JPH1098862A - Disk drive motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk drive motor in which write and read errors of a signal on and from a disk are eliminated, by attenuating and absorbing a vibration and a noise generated from a motor body. SOLUTION: In the disk drive motor 1 for driving a disk 6 in a rotating shaft direction in response to attachment or detachment of the disk 1 to or from a disk body, a member such as a guide member to be engaged with a member of the body for moving is formed integrally with a motor frame 3 with a molding material, vibration or noise generated from the body 2 is attenuated or absorbed by the molding material by utilizing characteristics that the molding material has low rigidity. Thus, write and read errors of a signal on and from the disk 6 due to the vibration are prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive motor used in a magneto-optical disk drive.

[0002]

2. Description of the Related Art A conventional disk drive motor is integrated with a disk drive main body to constitute a disk drive device, and in combination with a member of the disk drive main body, can be moved in the direction of the rotation axis with respect to the disk. When a magazine containing a disk is mounted on the disk body, the disk moves to a disk clamp position to clamp and rotate the disk, and moves to a position where it does not interfere with the magazine when taking out the magazine. In the above configuration, since the disk drive motor moves when the magazine is attached or detached, the device can be made thinner than a disk drive device that moves the magazine with respect to the disk drive motor.

In such a disk drive motor, a motor body for rotating a disk and a motor body are attached.
Combined with the member of the disk body, when moving,
And a motor frame having a plurality of members for guiding and positioning the motor body (hereinafter, referred to as guide positioning members). In a conventional disk drive motor, the motor body has a flange fixed to the motor frame with screws or the like, and the plurality of guide positioning members are, for example, guide pins, guide holes, positioning reference surface members, and the like. Are made of metal, and are fixed to predetermined positions of the motor frame individually by caulking or the like. The bracket included in the motor body is fixed on the motor frame by swaging.

[0004]

Generally, a disk drive motor is required to be reduced in size and cost. The disk drive motor rotates by generating torque by the magnetic flux generated by the field magnet of the motor body and the current supplied to the stator, and the rotation is transmitted to the disk clamped on the disk clamp surface to rotate the disk, Signal writing and reading are performed via the disk.

In order to reduce the size of the disk drive motor, anisotropic magnets that generate a large magnetic flux even when the volume is small are employed. Anisotropic magnets generate a sufficient magnetic flux in the gap between the opposed stators even though they are small, but it is difficult to make the magnetic flux density distribution in the gap sinusoidal. This is because sine wave magnetization is difficult due to the strong anisotropy of the anisotropic magnet. If the magnetic flux density distribution in the gap is not sinusoidal, the harmonic components cause vibrations in the motor body and also generate noise due to the vibrations. Further, if the current supplied to the stator is not sinusoidal, vibration is generated by its harmonic components, and noise is generated at the same time. It is technically possible to supply a sine-wave current to the stator, but a sine-wave generator or the like is required, which increases the cost of the disk drive motor circuit.

As described above, if the disk drive motor and the circuit for the disk drive motor are reduced in size and cost, there is a problem that vibration occurs in the motor body. In a disk drive device, a write / read error occurs when vibration generated in a motor body is transmitted to a disk. In the conventional disk drive motor, the vibration of the motor body is transmitted to a motor frame, which is a rigid metal single plate, and the transmitted vibration is transmitted to a rigid metal guide positioning member. Since the guide positioning member is also combined with a rigid disk drive body member made of metal, the vibration is transmitted to the disk drive body as it is, and when the magazine is inserted, the vibration is also transmitted to the magazine, and the above writing is performed. -There is a problem that a read error occurs.

In addition, since the vibration of the motor main body is transmitted to the rigid combination of metal members as it is, there is also a problem that the noise increases. Further, the plurality of guide positioning members are separately made of metal, so that the cost is high. Further, since each of the plurality of guide positioning members is assembled at a predetermined position of the motor frame, the number of assembling steps is increased, the dimensional error of the members themselves, and the individual assembly In addition, there is a problem that the mounting error accompanying the above is integrated and the dimensional accuracy is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is small in size. Vibration generated in a motor body is attenuated and absorbed, thereby eliminating signal writing / reading errors in a disk drive. An object of the present invention is to provide a disk drive motor that is low in cost and has high dimensional accuracy by reducing the number of assembly steps and the number of members.

[0009]

The disk drive motor according to the present invention constitutes a disk drive unit integrally with the disk drive main body, and responds to the attachment / detachment of a magazine containing a disk to / from the disk drive main body. In a disk drive motor that moves in the direction of the rotation axis to a disk clamp position or a position that does not interfere with the magazine, a motor frame and a bracket provided on the motor frame and fixed to the motor frame are integrally formed. A rotating shaft rotatably supported by the bracket via a bearing, a disc clamping surface, a rotor including a field magnet, and a rotor facing the field magnet with a gap interposed therebetween. A motor body having a stationary stator; and A guide member that guides the motor body and moves in the direction of the rotation axis, and a positioning member that positions the magazine at a disk clamp position. A part or the whole of the positioning member is formed integrally with the motor frame by a molding material, or is fixed by integral molding.

According to a second aspect of the present invention, the guide member is a pin-shaped or cam-shaped first guide member and a hole-shaped second guide member, and the positioning member is a convex magazine positioning member. There is a feature. According to a third aspect of the present invention, in the disk drive motor, the bracket is formed integrally with the motor frame with a mold material serving as a bracket fixing portion.

According to a fourth aspect of the present invention, in the disk drive motor, the bracket fixing portion is provided with a pressure control groove or hole for contracting the molding. According to a fifth aspect of the present invention, in the disk drive motor, when the bracket is integrally formed with the motor frame, a gradient is provided on a flange portion of the bracket in order to increase a fixing force to the motor frame.

According to a sixth aspect of the present invention, in the disk drive motor, the stator is fixed on a ring member formed of a molding material on the motor frame. 8. The disk drive motor according to claim 7, wherein the disk drive motor is integrated with the disk drive main body to constitute a disk drive device, and the disk drive motor interferes with a disk clamp position or a magazine according to attachment / detachment of a magazine containing a disk to / from the disk drive main body. In a disk drive motor that moves in the direction of the rotation axis to a position where the motor frame does not move, a motor frame, a bracket provided on the motor frame, and fixed to the motor frame, and integrally rotating, a bearing is mounted on the bracket. A rotating shaft rotatably supported through the rotor, a disk clamping surface, a rotor including a field magnet, and a stator provided at a position facing the field magnet with a gap therebetween. A motor body, and a plurality of locations on the motor frame outside the motor body A convex reference surface member formed integrally with the motor frame by a molding material, the reference surface of which contacts the disk drive main body when the disk is clamped, and the disk clamp surface is attached to the disk. And a reference surface member for positioning in the rotation axis direction.

[0013] The disk drive motor according to claim 8, wherein the area of the reference surface is a contact surface to the disk drive main body portion of the reference surface member is 0.6mm ² ~6.5mm ^2. 10. The disk drive motor according to claim 9, wherein the disk drive motor is integrated with the disk drive main body to constitute a disk drive device, and interferes with a disk clamp position or a magazine according to attachment / detachment of a magazine containing a disk to / from the disk drive main body. In a disk drive motor that moves in the direction of the rotation axis to a position where the motor frame does not move, a motor frame, a bracket provided on the motor frame, and fixed to the motor frame, and integrally rotating, a bearing is mounted on the bracket. A motor body having a rotating shaft rotatably supported via a disk clamp surface, a rotor including a field magnet, and a stator provided at a position facing the field magnet with a gap therebetween. And a portion of the motor frame to which the bracket is attached Characterized in that the long hole to the outside is provided.

According to a tenth aspect of the present invention, the long hole is filled with a molding material.
According to the first aspect of the present invention, a member that guides the motor body and moves in the rotation axis direction and a positioning member that positions the magazine at the disk clamp position (hereinafter, these members are collectively referred to as a guide positioning member). It is positioned on the motor frame at one time, and is integrally formed with a molding material. Each member is plural, therefore, the number of parts is large, the positioning location is also a large number of points on the motor frame,
It is necessary to perform many positionings with high accuracy. In addition, the shape of each member is accurately combined with the members of the disk drive body to increase the positioning accuracy of the motor body,
Its dimensional accuracy also needs to be strictly suppressed.

According to the present invention, if a molding die for molding each member is manufactured with high precision, the positions of a large number of members can be accurately determined by one molding, and the shape and dimensional accuracy can be secured.
Since the guide positioning member of the present invention is formed of a molding material by so-called outsert molding with respect to the motor frame, there is no need to prepare parts in advance, except for some parts, so that the number of parts can be significantly reduced. it can. Further, since each member can be formed at once by one molding, instead of individually attaching each member, the number of steps can be greatly reduced. Further, since each member is formed or fixed by molding using the same molding die, there is almost no variation in dimensions between products.

The guide positioning member of the present invention is formed of a molding material on the motor frame, or is fixed on the motor frame by the molding material at the time of outsert. Therefore, although the vibration generated in the motor main body is transmitted to the motor frame, the guide positioning member combined with the disk drive main body is formed of a less rigid rigid material that is more flexible than metal, Or because it is fixed to the motor frame with mold material,
When transmitted to the disk drive main body via these members, it is greatly attenuated. Therefore, the vibration generated in the motor main body does not affect the disk drive main body, thereby eliminating a signal writing / reading error via the disk in the disk drive device and suppressing noise.

According to the second aspect of the present invention, the member that guides the motor body and moves the motor body in the direction of the rotation axis is composed of a pin-shaped or cam-shaped first guide member and a hole-shaped second guide member. . When the first guide member is pin-shaped, the pin is fixed on the motor frame by molding with a molding material, engages with a cam-shaped member provided on the disk drive main body, guides and moves the motor main body. .
Usually, a plurality of sets of pin-shaped members and cam-shaped members are provided. However, since all of the pin-shaped members are fixed to the motor frame by a flexible and low-rigid molding material, the pin-shaped members are generated in the motor body. The vibration is transmitted to the motor frame,
Vibration is greatly attenuated at the portion of the molding material that fixes the pins, and does not affect the disk drive body. As long as the engagement relationship between the cam and the pin is maintained, the same guide function is maintained even if the locations where the respective members are provided are reversed.
That is, a pin may be provided on the disk drive main body, and the cam may be formed on the motor frame by molding.
Also in this case, since the cam is a molding material, the vibration is attenuated, and the influence of the vibration does not affect the disk drive main body.

The second guide member has a hole shape and is integrally formed on a motor frame with a molding material. A member of the disk drive main body is engaged with the hole of the second guide member. When the disk drive motor moves, the second guide member slides with the member of the disk drive body to guide the motor body. By providing a plurality of second guide members, the motor body is prevented from rotating when the disk drive motor moves. Further, when the second guide member slides with respect to the member of the disk drive main body, since the material is a molding material, frictional resistance is low and smooth guide can be performed.

When a magazine containing a disk is mounted on the disk drive main body, a member for positioning the magazine can be provided on the motor frame by integral molding of a molding material. When the disk drive motor is at the disk clamp position, the convex portion of the magazine positioning member contacts the positioning concave portion of the magazine to position the magazine in the disk drive body. Because the magazine positioning member is also formed of a flexible mold material,
The transmission resistance of vibration is large, and the magazine does not affect the transmission. As described above, both the first guide member, the second guide member, and the magazine positioning member act to attenuate the vibration, so that the noise caused by the vibration can be suppressed low.
In addition, since these members are formed simultaneously by one molding, the number of assembling steps and member costs can be extremely reduced.

In the invention of claim 3, the bracket is fixed to the motor frame by molding a molding material. By integrally molding the molding material, the bracket can be fixed to the motor frame in a short time, and a caulking step is not required, so that the number of steps can be reduced. In order to fix the bracket to the motor frame by caulking, a precise jig is required, but it is not necessary in molding. Therefore, manufacturing costs can be reduced.

The bracket rotatably supports, via a bearing, a rotating shaft and a disk clamp surface integrated with the rotating shaft. Therefore, in order to reduce the deflection of the disk clamp surface, a high degree of perpendicularity is required when the bracket is fixed to the motor frame. In the present invention, since the bracket is fixed to the motor frame by molding, the required verticality can be obtained with good reproducibility if the molding die is manufactured with high precision.

According to the fourth aspect of the present invention, when the bracket is fixed to the motor frame, the molding material of the bracket fixing portion contracts, but the pressure accompanying the contraction is received by the molding die through the pressure control groove or hole. Also, unnecessary pressure is not applied to the bracket, and the accuracy of the components of the bracket is not impaired. According to the fifth aspect of the present invention, by providing a gradient at the flange portion of the bracket fixed to the motor frame by molding, the pressure at the time of the contraction of the molding material is received by the gradient portion of the bracket, and it is directed in the radial direction of the bracket. Since the pressure is converted to the axial pressure that presses the bracket against the motor frame, the degree of adhesion between the bracket and the motor frame is increased, the accuracy of the verticality of the bracket is improved, and the radial distortion of the bracket can be suppressed. . .

According to the sixth aspect of the present invention, the stator is fixed on a ring-shaped member made of a molding material formed on the motor frame by molding. Since the height of the ring-shaped member can be accurately maintained by molding, the size of the air gap between the stator surface fixed thereon and the opposing field magnet can be accurately determined. In addition, since the stator is fixed on a ring-shaped member that is more flexible than metal, when the vibration of the stator is transmitted to the motor frame, its magnitude is attenuated, and therefore, the vibration of the disk drive body is reduced. Eliminate the effect.

According to a seventh aspect of the present invention, a convex reference surface member serving as a reference surface for positioning the disk clamp surface with respect to the disk in the rotation axis direction of the disk drive motor at the time of disk clamping is formed integrally with the motor frame using a molding material. I do. When positioning the disk clamp surface, the reference surface of the reference surface member contacts the disk drive body. Therefore, the motor frame and the disk drive main body abut on each other with the reference surface member interposed therebetween. Since the reference surface member is made of a molding material as described above, the transmission resistance of vibration is large. Therefore, the vibration generated in the motor body is transmitted to the motor frame, but is attenuated by the reference plane member,
Prevents the effects of vibration on the disk drive body.
In addition, noise is suppressed to a low level by attenuating the vibration.

The height of the plurality of reference surface members can be made exactly the same by increasing the precision of the molding die. Therefore, the disk clamp surface of the motor frame and the motor body assembled on the motor frame and the disk The degree of parallelism with the drive main body is maintained with high precision. Therefore, the degree of parallelism between the disk in the magazine inserted into the disk drive main body and the disk clamp surface is also high, and disk clamping is performed accurately. Further, since the reference surface member is formed by molding at the same time as the guide positioning member and the like, the number of parts and the number of steps are not increased.

In the invention according to claim 8, the reference surface member
0.6m in contact surface area with the disk drive body
m^Two~ 6.5mm^TwoAnd The contact surface area is 0.6
mm ^TwoIf it is less than 1, due to wear due to the attachment and detachment of the disk,
High degree of parallelism between the disc and the disc clamp surface
And the area of the contact surface is 6.5 mm^TwoOver
Vibration damping by the reference surface member
This is because the effect is reduced. Therefore, the area of the contact surface is
Within the above range, properly adjust the parallelism accuracy and vibration damping effect.
Can be maintained.

According to the ninth aspect of the present invention, by providing a long hole outside the portion of the motor frame to which the bracket is attached, the rigidity of the motor frame is reduced, the transmission resistance of vibration is increased, and the vibration generated in the motor body is reduced. Is attenuated by the elongated holes to prevent transmission to the disk drive body. In particular, it prevents a vibration in a frequency band that causes a writing or reading error from being transmitted to the disk drive body. A plurality of elongated holes may be provided as long as the strength of the motor frame is not impaired. By providing a plurality of slots, the rigidity of the motor frame is further reduced, and by reducing the rigidity, the energy of vibration can be converted into heat energy and the vibration can be absorbed. The position where the long hole is provided may be outside the mounting portion of the bracket, but in particular, it is more effective if provided between the reference surface members or between the reference surface member and the bracket. In this manner, noise can be suppressed to a low level by preventing transmission of vibration to the disk main body.

According to the tenth aspect of the present invention, by filling the long holes with a molding material, transmission of vibration and accompanying noise can be more effectively prevented.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a detailed embodiment of the present invention, an example in which the present invention is applied to a general magneto-optical disk drive will be described. The magneto-optical disk drive device includes a disk drive main body having a mechanism for mounting a magazine containing a magneto-optical disk as a recording medium and having an optical system for reading information on the disk, and a disk drive main body. A disk drive motor for rotating and driving the magneto-optical disk in the magazine, and a function of making the disk drive motor approach the magazine by using a force acting on the magazine when the magazine is mounted on the disk drive body. A disk drive motor moving mechanism, and the present invention relates to a disk drive motor constituting a magneto-optical disk drive device.
The configuration of the disk drive motor and the configuration excluding the optical system in the disk drive main body, specifically, the illustration other than the configuration of a part of the disk drive main body mechanically connected to the disk drive motor is shown. Description is omitted.

(First Embodiment) A first embodiment will be described with reference to FIGS. FIG. 1 is a partial cross-sectional view of the disk drive motor 1 and a part of the disk drive main body according to the present embodiment as viewed from the front (in a direction opposite to the side where the magazine 5 is inserted), and the magazine 5 is mounted. FIG. 2 shows a state where the magazine 5 is not mounted (when the magazine 5 is not mounted) (a position where the magazine 5 is mounted is indicated by a two-dot chain line in relation to other members). FIG. 2 is a right side view of FIG. FIG. 4 is a partial cross-sectional view of the disk drive motor 1 and a part of the disk drive main body according to the present embodiment as viewed from the front, showing a state in which the magazine 5 is mounted (when mounted), and FIG. FIG. 5 is a plan view of the disk drive motor 1, and FIG.
7 is a cross-sectional view of the motor body, FIG. 7 is a cross-sectional view of the motor frame, FIG. 8 is a cross-sectional view taken along line BB of FIG. 7, FIG. 9 is a right side view of FIG. , FIG. 11 shows D- in FIG.
D sectional view, FIG. 12 is an enlarged view showing details of the second guide member.

As shown in FIG. 1, the disk drive motor 1 according to the present embodiment can be moved up and down by a disk drive motor moving mechanism (not shown) so as to be vertically movable.
(Both are shown by two-dot chain lines). All members constituting the disk drive motor 1 are arranged on a motor frame 3 made of a single plate made of a steel plate. Among them, the center is a motor body 2 assembled on the motor frame 3. is there.

On the upper part of the motor body 2, a disk clamping surface 16 for attracting and clamping the magneto-optical disk 6 housed in the magazine 5 by magnetic force is provided by a metal chassis 4 on which the magazine 5 is mounted. And are provided in parallel. A metal slide plate 10 is attached to the lower surface of the chassis 4 so as to be slidable in parallel with the lower surface of the chassis 4 and in a direction perpendicular to the paper surface. Slide cams 7a and 7b which are bent vertically by press working and extend to the disk drive motor 1 side are provided integrally, and a slide cam 7c (shown in the drawing) is provided on the back side of the paper surface of the slide cam 7a. However, a slide cam 7d (not shown) is similarly provided integrally on the back side of the paper surface of the slide cam 7a.

The slide cams 7a, 7b, 7c, 7
The shape of d is the same, and taking a slide cam 7a as an example, as shown in FIG. 2, a cam surface including a slope portion inclined with respect to the chassis 4 and a parallel portion parallel with the chassis 4. 7a1 and other slide cams 7
b, 7c and 7d have the same cam surface 7b as the cam surface 7a1.
1, 7c1 and 7d1 (not shown) are provided, and the slide plate 10 including the slide cams 7a to 7d is urged by a spring (not shown) in the direction opposite to the arrow.

The cam surface 7a1 is engaged with a stainless steel guide pin 11a, which is a first guide member provided on the motor frame 3, and the other cam surfaces 7b1, 7c1, 7d1 , Guide pins 11 for each
b, 11c and 11d are engaged. The arrangement of the guide pins 11a to 11d is as shown in FIG. 5, and the slide cams 7a, 7b, 7c, 7d are arranged and formed on the slide plate 10 in accordance with the arrangement of the guide pins 11a to 11d. .

Next, a structure for fixing the guide pins 11a to 11d on the motor frame 3 will be described.
The fixing structures of the guide pins 11a to 11d are all the same, and taking the guide pin 11b as an example, as shown in FIG.
The guide pin 11b is fixed to the motor frame 3 via a guide pin fixing portion 12b formed by outsert molding using a polyacetal resin as a material without directly contacting the motor frame 3. As shown in FIG. 5, the guide pins 11a, 11c, 11d also have guide pin fixing portions 12a, 12c, 12d.
It is similarly fixed to the motor frame 3 by d.

The guide pin fixing portions 12a, 12b,
12c, 12d and guide pins 11b, 11c, 11d
A first guide member, which is a guide member according to claims 1 and 2, is provided at two corners (lower left and right) of the motor frame 3 together with these first guide members. Second guide members 13a, 13 serving as members
b is formed.

The second guide members 13a and 13b are formed by outsert molding so as to be integrated with the motor frame 3. Since these structures are the same except that they are bilaterally symmetric, one of them is one. The second guide member 13a will be described as an example with reference to FIG. As shown in FIG. 12, the second guide member 13a has cutouts 13a3, 13a4, and holes 13a2 (FIG. 12 respectively) provided at the corners of the motor frame 3 by machining such as pressing.
So that a guide hole 13a1 which is a through hole smaller than the hole 13a2 is formed coaxially with the hole 13a2 by a pin of the molding die so as to be formed as a through hole by a pin of the molding die. It is formed by filling a resin by outsert molding, and has a guide hole 13a.
In FIG. 1, a metal post 8a extending vertically and fixed to the chassis 4 shown in FIG. 1 is slid, so that the size of the guide hole 13a1 is finished so that the post 8a can slide without play. Have been.

According to this configuration, since the metal column 8a slides on the hollow slide surface formed in the inner diameter portion of the resin guide hole 13a1, its frictional resistance can be kept low, and it can be integrally formed by outsert molding. Hole 1
The resin filled in 3a2 and the notches 13a3 and 13a4 functions as a reinforcing portion of the second guide member 13a.

The other second guide member 13b has the same structure, and is fixed to the chassis 4 in a guide hole 13b2 (not shown) of the second guide member 13b in the same manner as the column 8a. The metal support 8b slides. By the way, as shown in FIG. 2, the second guide member 13a is engaged with the column 8a at a position away from the chassis 4.

FIG. 3 shows a positional relationship between the support 8a and the like and the guide member 13a and the like at the time of mounting. The guide 13a and the like slide with respect to the support 8a and move perpendicularly to the direction of the chassis 4. It stops at a predetermined position near the chassis 4. Similarly, FIG.
Shows a state in which the sliding with the column 8a has been completed and stopped at a position close to the chassis 4.

The column 8a of the second guide member 13a and the like
The slide movement with respect to the like is performed simultaneously with the movement of the first guide member such as the guide pin 11a by engagement with the slide cam 7a or the like, and the movement of these guide members is performed by the motor to which these guide members are attached. Since the frame 3 is moved in a direction perpendicular to the direction of the chassis 4 of the disk drive body, that is, in the direction of the rotation axis, the disk clamp surface 16 of the motor body 2 on the motor frame 3 does not interfere with the magazine as described above. To the disk clamp position.

The movement of the disk clamp surface 16 is the first
The guide member 11a and the second guide member 13a guide the chassis 4 and the disk 6 in the magazine 5 mounted on the chassis 4 without moving, tilting or rotating. It is done while maintaining the state. In FIG. 1, motor contact surfaces 9 a and 9 b of a metal disk drive main body are provided integrally with the chassis 4 on the chassis 4.

On the motor frame 3, the motor contact surface 9
a, 9b, a cylindrical reference surface member 15
a and 15b are formed on the motor frame 3 by outsert molding of a polyacetal resin. At the time of mounting, as shown in FIG. 3, the motor abutting surfaces 9a and 9b abut against the reference surface members 15a and 15b, thereby positioning the motor main body 2 with respect to the disk 6.

That is, when the magazine 5 containing the disk 6 is mounted in the chassis 4 of the disk drive main body, the motor is dimensioned so that the disk clamp surface 16 of the motor main body 2 comes into contact with the disk 6 in the magazine. The dimensions of the contact surface 9a and the like and the reference surface member 15a and the like are determined.
Further, although not shown, a yoke made of a magnetic material is provided near the center of the lower surface of the disk 6. The yoke is attracted by a field magnet 28 of the motor body 2, which will be described later, and the motor clamp surface 16 is not shown. The disc 6 and the disc clamping surface 16 come into close contact with each other, so that the disc 6 and the disc clamping surface 16 come into close contact with each other.

If the suction force is too strong or too weak, the disk clamping of the motor body 2 is not performed properly, but the motor contact surface 9a and the reference surface member 15a operate properly. As a result, the disc 6 and the motor main body 2 are positioned so that the disc is clamped smoothly. Although not shown, another motor contact surface 9c is provided integrally with the chassis 4, and a corresponding reference surface member 15c is provided on the motor frame as described later. The above-mentioned positioning will be performed at a location.

When viewed from the direction of FIG. 1, both ends of the motor frame 3 have cylindrical and convex magazine guide members 14a and 14b as positioning members for positioning the magazine.
Are formed by outsert molding of polyacetal resin similarly to the second guide member 13a and the like, and are fixed on the motor frame 3. Magazine guide members 14a, 1
When mounted, as shown in FIG. 3 and FIG. 4, the holes 4b pass through holes (not shown) of the chassis 4 and come into contact with positioning holes provided in the magazine 5. Therefore, the magazine 5 inserted into the chassis 4 of the motor drive main body is guided by the magazine guide members 14a and 14b in a direction parallel to the chassis 4, and is positioned in the insertion direction.

In FIGS. 2 and 4, reference numeral 17 denotes a convex magazine detection switch for detecting whether or not the magazine 5 is mounted. At the position in FIG. 2 where the magazine 5 is not mounted, the magazine detection switch 17 is under the chassis and is in an off state. However, when the magazine 5 in FIG. The magazine detection switch 17 is pressed by the wall and turned on,
By inputting the signal to a control circuit (not shown), the motor main body 2 of the disk drive motor 1 can be energized, and a rotor of the motor main body 2 to be described later can start rotating. Therefore, the magazine 5 is mounted, the disk 6 is clamped on the motor clamping surface 16 as described above, and the positioning is performed. At the same time, the rotor is brought into a rotatable state.
The actual rotation starts.

FIG. 5 is a plan view of the disk drive motor 1 in the present embodiment. In FIG. 1, the motor body 2 is disposed substantially at the center of the motor frame 3, and the motor clamp surface 16 and the rotating shaft 26 are shown.
When viewed from the direction of FIG. 5, a member disposed on the right side of the motor body 2 electrically connects a winding coil 31, a Hall element 32a, etc., which is a stator of the motor body 2 to be described later, and an external control circuit (not shown). This is a flexible substrate 18 having a pattern to be electrically connected, extending to the lower surface of the motor main body 2 and fixed, and also fixed to the motor frame 3 by fixing screws 19.

On the motor frame 3, guide pins 11a, 11b, 11c and 11d serving as first guide members are provided.
Guide pin fixing portions 12a, 1 of a molded article of polyacetal resin are provided at positions for engaging the slide cams 7a, 7b, 7c, 7d of the disk drive main body (not shown).
It is fixed by 2b, 12c, 12d, and is arranged so as to protrude from the end face of the motor frame 3. On the other hand, the slide cams 7a to 7d (not shown)
The slide plate 10 is press-bent at a position where the slide plate 10 can be engaged with 1a to 11d, so that both dimensions are optimized, and the dimensions are determined so that the motor body 2 can be guided when moving. .

The magazine guide members 14a and 14b are also provided on the motor frame 3 at positions where they contact the positioning holes of the magazine 5 when the magazine guide members 14a and 14b are mounted. Further, the second guide members 13a and 13b are also provided on the motor frame 3 at positions where they engage with the columns 8a and 8b fixed to the chassis 4 (not shown). Reference surface members 15a, 15a are provided outside the motor body 2 so as to surround the motor body 2.
b, 15c at positions corresponding to the motor contact surfaces 9a, 9b, 9c of the chassis 4 (not shown).
It is provided above.

The reference surface member 15a is provided outside the motor body 2
Slots 21a and 21b, which are arc-shaped through-grooves, are opened between the motor frame 3 and the space between the motor frame 3 and the space between the motor frames 3 and 15c. The line connecting the guide pin 11a and the guide pin 11b passes through the middle of the line connecting the reference surface member 15c and the reference surface member 15a and the reference surface member 15b, and guides outside the circle connecting the reference surface members 15a to 15c. Since the pin 11a and the guide pin 11b are arranged, 3
The reference surfaces of the reference surface members 15a to 15c evenly contact the three motor contact surfaces 9a to 9c of the chassis 4,
Accurate positioning is possible.

FIG. 6 is a sectional view taken along line AA of FIG. FIG. 6 mainly shows a cross section of the motor body 2. FIG.
As shown in (1), a bracket 22 made of stainless steel is attached to a hole formed in the motor frame 3 and is fixed to the motor frame 3 so as to be perpendicular to the motor frame 3 by a bracket fixing portion 23 which is a molded body of polyacetal resin. Have been. Ball bear rigs 24 and 25 are adhesively fixed to the inner surface of the bracket 22. The ball bearings 24 and 25 rotatably support a rotating shaft 26 made of stainless steel.

A rotor frame 27 made of aluminum is press-fitted into the rotating shaft 26, and is integrated with the rotating shaft 26 and rotated. The upper surface of the rotor frame 27 is the disk clamping surface 16, and the lower surface is bonded to a ring-shaped field magnet 28 made of neodymium sintered magnet. A rotor yoke 29 made of a plated steel plate, which is a magnetic material, is arranged on an outer peripheral portion of the field magnet 28.
It is bonded to the field magnet 28 and the rotor frame 27. The rotor yoke 29 covers the outer peripheral surface and a part of the upper surface of the field magnet 28, and prevents the magnetic flux leaking from the field magnet 28 from entering the disk 6.
Is shielded. In the present embodiment, the rotor is constituted by the rotating shaft 26, the rotor frame 27, the disk clamp surface 16, which is a part thereof, the field magnet 28, and the rotor yoke 29.

A ring-shaped auxiliary yoke 30 is provided at a position facing the field magnet 28 in the direction of the rotation axis, and is fixed on the motor frame 3. The auxiliary yoke 30 is made of an electromagnetic steel plate and serves as a magnetic path of a magnetic flux generated by the field magnet 28. The auxiliary yoke 30 is formed by laminating thin plates to reduce eddy current loss. On the upper surface of the auxiliary yoke 30, the flexible substrate 18 is fixed on the auxiliary yoke 30 with a spacer 33 provided with a double-sided adhesive with an insulator therebetween. The winding coil 31 is fixed on the flexible board 18 and faces the field magnet 28 with a gap therebetween. A Hall element 32 for detecting a magnetic pole of a magnetized field magnet 28 is provided on the flexible substrate 18 similarly to the winding coil 31.
a is fixed. Although not shown, another Hall element 32 b is fixed on the flexible substrate 18.

FIG. 7 is a plan view of the disk drive motor 1 with the motor body 2 and the flexible board 18 removed from the members shown in FIG. However, the bracket 22 shown in FIG. 6 is shown in FIG. Most of the members illustrated in FIG. 7 are members illustrated in FIG. 5, and thus redundant description will be omitted, and only main portions will be described with reference to cross-sectional views and the like. In FIG. 7, reference numeral 20 denotes a screw hole for fixing the flexible substrate 18 to the motor frame 3.

FIG. 8 is a cross-sectional view taken along the line BB of FIG. In FIG. 8, a convex magazine guide member 14 a is formed at the right end by outsert molding of a polyacetal resin by cutting out a part of the motor frame 3, and is fixed to the motor frame 3. Since only the resin portion shown in FIG. 8 has a low fixing strength, as shown in FIG. 7, a long hole is formed in the motor frame 3 in the vertical direction when viewed from the illustrated direction of the magazine guide member 14a. At this time, resin is filled at the same time, and the magazine guide reinforcing portion 14a1 is provided to secure the fixing strength. Similarly, the magazine guide member 14b is provided with a magazine guide reinforcing portion.

In FIG. 8, a hole is formed in a part of the motor frame 3 on the left side of the second guide member 13a, and the reference surface member 15a is formed by outsert molding.
It is stuck to. On the left side of the reference surface member 15a, a bracket 22 is fixed to the motor frame 3 by a bracket fixing portion 23 which is a molded body of polyacetal resin. FIG. 10 is an enlarged view of this portion, which is a cross-sectional view taken along the line CC in FIG. In FIG. 10, the bracket 22 has a hollow cylindrical shape for accommodating the ball bearings 24 and 25 and the rotating shaft 26 rotatably supported by the ball bearings 24 and 25, and a flange having a slope 22a at a lower portion thereof. Is provided. The bracket 22 is mounted so as to be applied to a hole formed in the motor frame 3 by a flange portion or the like, and a bracket fixing portion 2 made of resin is formed around the flange by outsert molding.
3 and fixed to the motor frame 3. The bracket fixing part 23 on the right side in the figure is the motor frame 3
Is cut out, and resin is filled into the notched portion to enhance the fixing force. A groove 23a for pressure control is provided in the bracket fixing portion, and a part of a large pressure generated at the time of injection pressure or cooling shrinkage (molding shrinkage) is received by a molding die. To prevent the bracket 22 from being distorted. The gradient 22a of the flange of the bracket 22 converts the pressure in the radial direction of the bracket 22 during shrinkage of the resin into an axial method to increase the degree of adhesion of the bracket 22 to the motor frame 3, thereby increasing the motor of the bracket 22. The accuracy of the verticality with respect to the frame 3 can be improved. The bracket fixing portion 23 is provided with a groove 23a for pressure control. However, even in the case of a hole instead of a groove, the injection pressure and the contraction pressure are similarly received by the molding die, and the pressure is increased in the radial direction of the bracket. It can be prevented from joining.

In FIG. 8, the hole on the left side of the bracket 22 is a cross section of the long hole 21b in FIG. 7, and is filled with resin. In FIG. 8, a guide pin 11b and a guide pin fixing portion 12b as a first guide member are shown at the left end. A part of the motor frame 3 is cut out, a resin is filled in the cutout part and the periphery thereof, and outsert molding is performed to form a guide pin fixing part 12b, and the guide pin 11b is fixed to the motor frame 3. As shown in FIG. 7, the motor frame 3 is provided with reinforcing portions 12b1 each having a hole formed in the motor frame 3 above and below the guide pin fixing portion 12b.
The resin of the reinforcing portion 12b1 is formed integrally with the resin of the fixed portion 12b on the back surface of the motor frame 3. Therefore,
The guide pin 11b is securely fixed to the motor frame 3. The other guide pins 11a, 11c and 11d are similarly fixed to the motor frame 3 by guide pin fixing portions 12a, 12c and 12d, respectively.

FIG. 11 is a sectional view taken along the line DD in FIG. In FIG. 11, the motor frame 3 is cut out by press working or the like, and the cut-out portion is filled with resin, and the reference surface member 15c is outsert molded. Reference numeral 15c denotes a reference surface member having an upper surface serving as a reference surface, which is formed in a cylindrical shape. The reference surface is formed to have a diameter of 2 mm and an area of about 3.14 mm ² .

15c1 and 15c2 are reference surface members 15c.
And is integrated with the reference surface member 15c on the back surface of the motor frame 3 and functions to securely fix the reference surface member 15c to the motor frame. In the figure, reference numeral 34 denotes a pin gate of a molding die when the reference surface member 15c is molded, and is indicated by a two-dot chain line. The pin gate 34 is provided below the reinforcing portion 15c2 because sinks and the like occur in the vicinity of the gate and the dimensional accuracy is reduced. Therefore, the pin gate 34 is disposed at a position away from the reference surface member 15c.
2 through the groove on the lower surface of the motor frame 3 and the reference surface member 1
5c is filled with resin, and the reference surface member 15c
To prevent the influence of sink marks and the like, and secure the dimensional accuracy such as the parallelism and the height of the upper surface of the reference surface member 15c serving as the reference surface with the motor drive main body. As described above, the shape of the reference surface member 15c is set such that the area of the reference surface is approximately 3.1.
Although the cylindrical shape is 4 mm ² , other shapes may be used as long as the shape is convex and the area of the reference surface in contact with the disk drive main body is a predetermined size.

FIG. 9 is a right side view of FIG. The fixing portion 12c of the guide pin 11c, the magazine guide member 14a, the guide pin 11a and the guide pin fixing portion 12a, the bracket 22, and the second guide member 13a are illustrated.
A portion indicated by a reference numeral 13a3 is a portion in which a notch of the motor frame 3 is filled with a resin to serve as a reinforcing portion of the second guide member 13a.

The operation of the above configuration will be described. The disk drive motor 1 in the present embodiment is a so-called axial gap type three-phase brushless coreless motor. A field magnet 28 for generating torque and a winding coil 31 serving as a stator are opposed to each other in a rotation axis direction, that is, an axial direction. The field magnet is magnetized to 12 poles in its thickness direction. , And three-phase driving is possible.
The Hall element 3 detects the magnetic pole of the field magnet 28.
Two phases 2a and 32b are for two phases, and the other phase is detected by arithmetic processing. Further, the stator does not include the core and includes only the coil winding 31. Therefore, the disk drive motor 1 in the present embodiment is a motor of the above type.

Next, the operation of the disk drive motor 1 when the magazine is not mounted and when the magazine is mounted will be described. As described above, when the magazine is not mounted, as shown in FIG. 1, the disk clamp surface 16 which is the uppermost surface of the motor body 2 is at a position retracted from the chassis 4 surface on which the magazine 5 is mounted. Does not hinder mounting. That is, the disk drive motor 1 is at a position where it does not interfere with the magazine 5. In this state, in FIG. 2, since the slide plate 10 is urged by a spring (not shown) in the direction opposite to the direction of the arrow, the guide pins 11a to 11d are moved by the slide cams 7a to 7d.
The motor body 2 is placed on a plane portion parallel to the chassis 4 such as the cam surface 7a1 of d. As a result, the motor body 2 is located farthest from the chassis 4 in the rotation axis direction.

When the magazine 5 is mounted on the chassis 4,
The direction of the force for mounting the magazine 5 is reversed by the disk drive motor moving mechanism, and transmitted to the slide plate 10. That is, when the magazine 5 is mounted on the motor body 2 (in the direction opposite to the arrow in FIG. 2),
The slide plate 10 is pushed by the disk drive motor moving mechanism in the direction of the arrow in FIG. 2 against the urging of the spring.

With this movement, the guide pins 11a to 11d, which are the first guide members, move along the slopes such as the cam surfaces 7a1 of the slide cams 7a to 7d. Therefore, the motor body 2 on the motor frame 3 also moves in the same direction, so that the uppermost disk clamp surface 16 passes through the hole of the chassis 4 and approaches the disk surface in the magazine 5. Then, as shown in FIG. At this time, the guide pins 11a to 11d have moved to the ends of the slopes such as the cam surface 7a1 as shown in FIG.

The second guide members 13a, 13b are also supported by the columns 8a, 8b simultaneously with the movement of the guide pins 11a to 11d.
Slide along. At this time, the columns 8a and 8b are made of metal, and the corresponding guide holes 13b1 and 13b2 are made of resin, so that the frictional resistance can be kept small. Also, the second guide members 13a, 13b and the columns 8a, 8b
Prevents rotation of the motor body 2 during movement. As described above, the first guide members 11a to 11d
And the second guide members 13a and 13b engage with the slide cams 7a to 7d and the columns 8a and 8b, respectively, so that the disk clamping surface 16 of the motor body 2 is parallel to the chassis 4 and therefore the magazine to be mounted. 5 in a state parallel to the disk 6 and serves to move the disk in the rotation axis direction.

When the disk clamp surface 16 is in contact with the disk 6, the magnetic flux of the field magnet 28 reaches a yoke made of a magnetic material near the center of the lower surface of the disk 6 (not shown), and attracts the disk 6 as described above. Then, the disk 6 is fixed to the disk clamping surface 16, that is, clamped. At this time, the disk drive motor is at the disk clamp position.

At the disk clamp position, the disk drive motor 1 is set in a rotatable state by the magazine detection switch 17, and a write or read command from the disk drive unit causes the Hall element 32a,
32b detects the magnetic pole of the field magnet 28, determines the magnetic pole position of another phase by arithmetic processing, and allows a three-phase current to flow through the nine winding coils 31 as the stator in a predetermined direction. The torque is generated between the magnetic flux of the field magnet 28 and the rotor of the motor body 2 is rotated. That is, the disk drive motor 1 is rotated. Therefore, the disk 6 clamped on the disk clamp surface 16 also rotates, and desired writing or reading is performed. In this case, the field magnet 28 has two functions of clamping the disk 6 and generating torque in the disk drive motor 1. The three-phase current has a rectangular waveform so that the motor drive circuit is inexpensive.

As described above, a neodymium sintered magnet is used for the field magnet 28. The neodymium sintered magnet is a magnetic anisotropic magnet and has an extremely high magnetic flux density as an anisotropic property. Therefore, even with the same motor output, the magnet can be downsized, which contributes to downsizing of the motor. In this embodiment, the disk drive motor 1 uses a resin having low rigidity in a portion where the disk drive motor 1 is engaged with the disk drive main body and the magazine 5, and the vibration generated in the motor main body 2 is transmitted through the motor frame 3 to the disk drive main body. The motor frame 3 supporting the motor body 2 is provided with a long hole to reduce the rigidity of the motor frame 3 and to absorb and attenuate vibration. I have.

That is, the guide pins 11a to 11d as the first guide members are fixed to the guide pin fixing portion 1 as a resin molded body.
The second guide members 13a and 13b, the magazine guide members 14a and 14b, and the reference surface members 15a and 15c are also formed on the motor frame 3 by resin moldings. Even when these members come into contact with the disk drive main body and the magazine 5, the vibration is greatly reduced or absorbed by the resin portion having low rigidity and high vibration transmission resistance and transmitted to the disk drive main body. Has been prevented. The motor frame 3 is made of a steel plate and is originally a rigid member. However, by providing the slots 21a and 21b, its rigidity is reduced, and the slots function to absorb vibration. Therefore, the vibration is reduced and absorbed, so that the noise is also reduced.

In this embodiment, the motor frame 3
All the members formed or fixed on the resin by integral molding are formed or fixed by a single molding. Therefore, the number of assembling steps can be significantly reduced, and the number of parts can be reduced because parts formed by resin molding do not need to be prepared in advance. Further, if the molding die is manufactured with high accuracy, the positional accuracy of each member on the motor frame 3 and the dimensional accuracy of the members can be made high. For example, the reference surface members 15a to 15c do not need to be prepared in advance, and the molding is performed in consideration of the gate position, so that dimensional accuracy is high. Regarding the molding position, the notch for forming the reference surface member 15a and the like of the motor frame 3 and the groove on the back surface are formed by pressing, so that the pressing die and the resin forming die can be formed with high precision. If manufactured, the accuracy of the position can be increased. This applies not only to the reference surface member 15a and the like, but also to other members such as the bracket 22.

In the present embodiment, a resin material for molding such as a first guide member, a second guide member, a positioning member, a reference surface member, etc., which forms or fixes each member on the motor frame 3 by integral molding. Was used as a polyacetal resin, but other resin materials such as polycarbonate, polybutylene terephthalate, and the like can provide similar effects. Further, in the present embodiment, the first guide member 11a and the like are pin-shaped, the slide cam 7a and the like are provided on the chassis 4 of the disk main body, and both are engaged with each other to guide the disk drive motor 1 when moving. Had the effect of
Conversely, the same operation and effect can be obtained by providing a guide pin on the chassis 4 side and molding a slide cam as a first guide member on the motor frame with resin.

In the present embodiment, the second guide members 13a and 13b are formed on the motor frame 3 by outsert molding of resin, and the resin holes serve as guides.
Although it has been described that the second guide members 13a and 13b are engaged with the other disk drive main bodies even if the second guide members 13a and 13b are metal holes opened in the motor frame 3 due to an assembly process or the like. If the member to be mounted is made of resin or fixed with resin, the vibration generated in the motor main body 2 is sufficiently reduced, and the influence of the vibration does not affect the disk drive main body.

Similarly, the first guide members 11a to 11d
Even if the fixing portions 12a to 12d are not made of resin, the influence of vibration on the disk drive main body can be prevented if the member engaging with the other disk drive main body is made of resin. Further, in the present embodiment, the first guide member, the second guide member, the positioning member, and the reference surface member are made of a member that engages with the disk drive main body made of resin, and are integrally formed with the motor frame, or the motor is made of resin. Fixed to the frame,
Furthermore, by providing a long hole in the motor frame, the vibration of the motor body was reduced, but without providing the long hole, the member engaging with the disk drive body was made of resin and integrated with the motor frame. Alternatively, even if it is fixed to the motor frame with resin, the influence of vibration on the disk drive body can be prevented.

Further, the influence of vibration on the disk drive main body can be prevented only by providing the long hole without making the member engaging with the disk drive main body made of resin or fixing the member to the motor frame with resin. In the present embodiment, the motor type is the axial gap type. However, the present invention can be implemented as a radial gap by changing the configuration of the motor main body 2. (Embodiment 2) Embodiment 2 will be described with reference to FIG. In the figure, the same members as those in the first embodiment are denoted by the same reference numerals and corresponded. In addition, only different parts from the first embodiment will be described, and overlapping description will be omitted.

FIG. 13 is a sectional view of the motor body 2.
The second embodiment differs from the first embodiment in that the auxiliary yoke 30 in the first embodiment is omitted and the motor yoke 3 is used instead. The motor frame 3 acting as an auxiliary yoke serves as a magnetic path of a magnetic flux generated by the field magnet 28. In addition, the motor body 2 becomes thinner by the amount of omitting the auxiliary yoke, and the disk drive motor 1 becomes thinner. Also, the height of the bracket 22 is reduced by the height of the auxiliary yoke, and the ball bearings 24, 2 fixed to the inner surface of the bracket 22 are provided.
5 also adopts a thin type, and ball bearings 24, 25
The height of the rotating shaft 26 that is rotatably supported via the shaft is also reduced. The configuration other than the above is the same as that of the first embodiment.

The effects of this embodiment are that the disk drive motor can be made thinner and that the cost can be reduced by eliminating the auxiliary yoke, and the other effects are the same as those of the first embodiment. (Embodiment 3) Embodiment 3 will be described with reference to FIG. In the figure, the same members as those in the first embodiment are denoted by the same reference numerals and corresponded. In addition, only different parts from the first embodiment will be described, and overlapping description will be omitted. FIG. 14 is a plan view of the disk drive motor 1 excluding the motor body 2 other than the bracket 22 and the flexible substrate 18, similarly to FIG. 7 in the first embodiment.

As shown in FIG. 14, the reference surface members 15a to 15a
On the side of the bracket 22 of 15c (inside), the reference surface member 15
a to 15c.
Three long holes 35a, 35b, and 35c formed so as to extend outside 1a and 21b are added. The three long holes 35a to 35c are filled with a molded article of polyacetal resin, like the long holes 21a and 21b. The configuration other than the above is the same as that of the first embodiment.

The effect of this embodiment is that three long holes 35a are provided.
By adding ~ 35c, the rigidity of the motor frame 3 is further reduced, and the vibration generated in the motor main body 2 is absorbed more by the increase in the length of the long hole portion than in the first embodiment. If the long hole is provided on the motor frame 3 at a proper position and in a proper size, writing to a disc,
Vibration in a frequency band that affects reading can be eliminated. In the present embodiment, this is an appropriate example, and the vibration is almost completely absorbed with further care. In addition, noise caused by vibration is almost completely eliminated.

(Fourth Embodiment) A fourth embodiment will be described with reference to FIGS. 15 and 16, the same members as those in the first embodiment are denoted by the same reference numerals and correspond to each other. In addition, only different parts from the first embodiment will be described, and overlapping description will be omitted. FIG. 15 is a plan view of the disk drive motor 1 according to the present embodiment, and FIG.
6 is a cross-sectional view taken along the line EE of FIG.

In FIG. 16, reference numeral 36 denotes a so-called sheet coil which is a stator. The sheet coil 31 has a coil pattern formed in a sheet-like epoxy resin which is an insulator, so that the stator can be made thinner than a wound coil. The seat coil 36 is a double ring member 37a, 37b concentrically formed of polyacetal resin on the motor frame 3 and integrally formed with the motor frame 3.
It is placed on top and glued. On the lower surface of the sheet coil 36, the flexible substrate 18 is attached and arranged on the sheet coil. The ring member 37a is integrated with a reference surface member 38b disposed outside the ring member 37a and is formed of polyacetal resin. The reference surface member 38b has a cylindrical shape as in the first embodiment, but has a higher height and a hollow interior. The reason why the inside is hollow is to prevent the dimensional accuracy of the reference surface member 38b from being reduced due to sink marks or the like during molding and to ensure the height dimensional accuracy of the ring member 37a. As shown in FIG. 15, at the position equidistant from the center of the motor body 2, other reference surface members 38a and 38c having the same shape are arranged by integral molding of the motor frame 3 and resin as in the first embodiment. I have. Although not shown, the motor contact surface of the disk drive main body (not shown) with which the reference surface member 38b and the like abut also has a shape corresponding to the shape of the reference surface member 38b and the like.

The inner ring member 37b is a bracket 39
And is molded with resin. The bracket 39 is the bracket 2 of the first embodiment.
2, the bracket fixing portion 40 has a groove 4 for controlling pressure at the time of resin contraction or the like as in the first embodiment.
Since 0a is provided, it is not affected by radial pressure.

On the left side of FIG. 16, a flexible substrate fixing portion 41 formed on the motor frame 3 integrally with the ring member 37a using polyacetal resin is arranged. The flexible substrate fixing portion 41 is also a reference surface member 38b.
Similarly to the above, the notch of the motor frame 3 is filled with resin to be integrally formed with the motor frame 3, and has a hollow portion at the center. The reason why the hollow portion is provided is that the ring member 38 is provided.
This is for ensuring the height dimensional accuracy of a. The flexible substrate fixing section 41 is for mounting the flexible substrate 18 and holding the sheet coil 36 mounted on the flexible substrate 18 flat.

The operation according to the above configuration is the same as that of the first embodiment, since the winding coil 31 has become the sheet coil 36, but both have almost the same operation. The effect of the present embodiment is that the height dimension of the ring members 37a and 37b becomes high if the molding die is manufactured with high precision.
The sheet coil 36 mounted on the surface 7a, 37b is parallel to the surface of the field magnet and can improve the positional accuracy. The ring members 37a, 37b are formed of resin, and the vibration transmission resistance is low. Since the vibration generated by the stator, that is, the sheet coil 36 is large, the motor frame 3
This prevents transmission to the disk drive main body via the above. Further, the sheet coil 36 is the winding coil 3
1, the field magnet 28 and the auxiliary yoke 30
There is also an effect that the air gap between them can be shortened.

(Fifth Embodiment) A fifth embodiment will be described with reference to FIG. In the figure, the same members as those in the first embodiment or the fourth embodiment are denoted by the same reference numerals and corresponded. In addition, only different portions from the first and fourth embodiments will be described, and overlapping description will be omitted. FIG. 17 mainly shows the motor body 2 of the disk drive motor 1. In FIG. 17, a cylindrical rotor ring 27a extends from the rotor frame 27 in the direction of the motor shaft 3 in the direction of the rotation axis, and a ring-shaped auxiliary yoke 42 is attached to a tip end thereof. The surface of the auxiliary yoke 42 is parallel to the surface of the field magnet 28, and the sheet coil 36 serving as a stator and the flexible substrate 18 are provided between the auxiliary yoke 42 and the lower surface of the field magnet 28.
Are arranged. In the present embodiment,
The rotor comprises a rotating shaft 26, a disk clamp surface 16, a rotor frame 27 including a rotor ring 27a, a field magnet 28, and a rotor yoke 29.
Rotate around the center. Therefore, the auxiliary yoke 4
2 differs from the other embodiments in that it rotates as a part of the rotor.

Unlike the fourth embodiment, the stator 36 and the flexible board 18 are supported only by the ring member 37a, and there is no ring member 37b. Bracket 43
Has a known configuration and is adhered to the motor frame 3.
The reference surface member 38b is the same as that of the fourth embodiment, and is integrated with the ring member 37a, and the other reference surface members 38a, 38
The motor frame 3 and resin are integrally formed with the motor frame 3 in the cut-out portion together with c. The configuration other than the above is the same as that of the first embodiment.

The operation of the above configuration is almost the same as that of the first embodiment, except that the auxiliary yoke 42 rotates. The effect of the present embodiment is that the auxiliary yoke 42 rotates integrally with the field magnet 28, so that the auxiliary yoke 42 does not cross the magnetic flux generated by the field magnet 28, so that there is no eddy current loss. The point is that the efficiency of the disk drive motor 1 is improved as compared with the embodiment.

[0088]

According to the present invention, a disk drive motor is moved to engage with a part of a disk drive main body provided on a motor frame, and a member or a magazine for guiding and positioning the motor main body is positioned. The parts to be mounted and the reference plane members are molded integrally with the motor frame using a low-rigidity molding material, or are fixed to the motor frame with a molding material, which significantly reduces vibration and noise generated in the motor body. Since the vibration is absorbed by providing a damped hole and providing an elongated hole in the motor frame, the influence of the vibration on the disk drive main body is prevented, and thus the influence of the vibration on the disk drive is eliminated. Writing and reading errors can be prevented, and noise due to vibration can be extremely low.

As described above, since the vibration generated in the motor body is not transmitted to the disk drive device,
It is possible to employ a small anisotropic magnet having a high magnetic flux density for the disk drive motor, and the disk drive motor can be downsized. Since the guide member for movement, the positioning member of the magazine, the reference surface member, and the like provided on the motor frame are integrally formed or fixed with the motor frame by one molding, the disk drive motor is manufactured. The number of parts and man-hours can be greatly reduced, and the cost of the disk drive motor can be reduced.

Since the guide member for movement, the positioning member of the magazine, the reference surface member, and the like provided on the motor frame are integrally molded or fixed on the motor frame by a high-precision molding die, each member is The positioning accuracy and the dimensional accuracy of the disk drive motor can be made high, so that the movement of the disk drive motor can be made smooth and the positioning of the disk and the magazine can be made accurate.

By setting the position and size of the reference surface member to high precision, the positioning of the disk clamping surface during disk clamping is made accurate, the force for adsorbing and fixing the disk to the disk clamping surface is made appropriate, and the disk drive device is mounted. Can be smoothly attached and detached.

[Brief description of the drawings]

FIG. 1 is a front view of a disk drive motor in a position not interfering with a magazine in the first embodiment.

FIG. 2 is a right side view of FIG. 1 in the first embodiment.

FIG. 3 is a front view of a disk drive motor at a disk clamp position in the first embodiment.

FIG. 4 is a right side view of FIG. 3 in the first embodiment.

FIG. 5 is a plan view of the disk drive motor according to the first embodiment.

FIG. 6 is a cross-sectional view of a motor body according to the first embodiment.

FIG. 7 is a plan view of the motor frame and members provided thereon according to the first embodiment.

FIG. 8 is a cross-sectional view showing a BB cross section of FIG. 7 in the first embodiment.

FIG. 9 is a side view of the motor frame and members provided thereon according to the first embodiment.

FIG. 10 is a cross-sectional view showing a CC cross section of FIG. 7 in the first embodiment.

FIG. 11 is a cross-sectional view showing a DD cross section of FIG. 7 in the first embodiment.

FIG. 12 is an enlarged view showing a second guide member according to the first embodiment.

FIG. 13 is a sectional view of a motor body according to the second embodiment.

FIG. 14 is a plan view of a motor frame and members provided thereon according to the third embodiment.

FIG. 15 is a plan view of a disk drive motor according to a fourth embodiment.

FIG. 16 is a sectional view of a motor body according to the fourth embodiment.

FIG. 17 is a sectional view of a motor body according to the fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disk drive motor 2 Motor main body 3 Motor frame 4 Chassis 5 Magazine 6 Disk 7a, 7b Slide cam 8a, 8b Support 10 Slide plate 11a-11d First guide member 13a, 13b Second guide member 14a, 14b Magazine positioning Members 15a to 15c Reference surface member 16 Disc clamp surface 21a, 21b Slot 22 Bracket 24 Ball bearing 25 Ball bearing 26 Rotating shaft 28 Field magnet 30, 42 Auxiliary yoke 31 Winding coil 36 Sheet coil 37a, 37b Ring member

Claims (10)

[Claims] A disk drive device integrally formed with the disk drive main body, wherein a magazine accommodating a disk is attached to and detached from the disk drive main body;
In a disk drive motor that moves in the direction of a rotation axis to a disk clamp position or a position that does not interfere with a magazine, a motor frame; and a bracket provided on the motor frame and fixed to the motor frame, integrally rotating. A rotating shaft rotatably supported by the bracket via a bearing, a disk clamp surface, a rotor including a field magnet, and a position facing the field magnet with a gap therebetween. A motor body having a stator; and a guide member that is combined with a part of the disk drive body during the movement, guides the motor body, and moves the magazine in a rotation axis direction. A positioning member for positioning, the guide member and the positioning Disk drive motor, wherein a portion of the wood or all are fixed or are molded integrally with the molding material to said motor frame, or by integral molding. 2. The method according to claim 1, wherein said guide member is a pin-shaped or cam-shaped first guide member and a hole-shaped second guide member, and said positioning member is a convex magazine positioning member. Item 10. The disk drive motor according to Item 1. 3. The disk drive motor according to claim 1, wherein said bracket is formed of a molding material serving as a bracket fixing portion and is integrally formed with said motor frame. 4. The disk drive motor according to claim 3, wherein said bracket fixing portion is provided with a groove or a hole for controlling pressure for molding shrinkage. 5. The disk drive according to claim 1, wherein when the bracket is integrally formed with the motor frame, a gradient is provided on a flange portion of the bracket to increase a fixing force to the motor frame. motor. 6. The disk drive motor according to claim 1, wherein said stator is fixed on a ring member formed of a molding material on said motor frame. 7. A disk drive unit is formed integrally with a disk drive main body, and is rotated to a disk clamp position or a position that does not interfere with the magazine in accordance with attachment / detachment of a magazine containing disks to / from the disk drive main body. A disk drive motor moving in the axial direction, comprising: a motor frame; a bracket provided on the motor frame and fixed to the motor frame; and rotating integrally with the bracket, the bracket being rotatable via a bearing. A motor body comprising: a rotating shaft supported by the motor; a disk clamping surface; a rotor including a field magnet; and a stator provided at a position opposed to the field magnet with a gap therebetween. A plurality of locations on the motor frame outside the motor body, Tafuremu and a convex reference plane member molded integrally, and the reference surface when the disc clamp is brought into contact with the disk drive main body portion,
A disk drive motor, comprising: a reference surface member for positioning the disk clamp surface with respect to the disk in a rotation axis direction. 8. An area of a reference surface, which is a contact surface of the reference surface member with a disk drive main body, is 0.6 mm ^{2 to} 6.5.
8. The disk drive motor according to claim 7, wherein the diameter is mm ² . 9. A disk drive unit is formed integrally with a disk drive main unit, and a magazine accommodating a disk is attached to and detached from the disk drive main unit.
In a disk drive motor that moves in the direction of a rotation axis to a disk clamp position or a position that does not interfere with a magazine, a motor frame; and a bracket provided on the motor frame and fixed to the motor frame, integrally rotating. A rotating shaft rotatably supported by the bracket via a bearing, a disk clamp surface, a rotor including a field magnet, and a position facing the field magnet with a gap therebetween. A disk drive motor, comprising: a motor body having a stator; and a slot provided outside a portion of the motor frame to which the bracket is attached. 10. The disk drive motor according to claim 9, wherein said elongated hole is filled with a molding material.