WO2013038587A1 - Lamp - Google Patents

Abstract

A lamp (1) comprises a light emitting unit (14b), a power source line (23a) which configures a power supply path to the light emitting unit (14b), a metal cap (50) which is formed in a cylindrical shape which is closed on end and with a screw groove (51a) disposed on the inner circumference face of the metal cap (50), and a circuit case (60) further comprising a metal cap attachment part (63) to which the metal cap (50) is attached. The metal cap attachment part (63) has a cylindrical shape and has a screw peak (61) protruding on the outer circumference face which is capable of screwing together with the screw groove (51a). The screw peak (61) is formed in a shape in which a plurality of notch parts (60a) aligns in the cylindrical axis direction. The power source line (23a) follows the inner side of the metal cap attachment part (63) and is folded back from the aperture (66) of the metal cap attachment part (63) along the outer circumference face (63a), and is positioned in a state in which the power source line (23a) passes through the inner side of each of the notch parts (60a), with the power source line (23a) being sandwiched between the metal cap attachment part (63) and the metal cap (50) thereupon. The central axis of the power source line (23a) which is present within the notch parts (60a) is in a lower location than the top part of the screw peak (61).

Description

lamp

The present invention relates to a lamp, and more particularly to a structure for reducing assembly defects.

Conventionally, a lamp is provided with a light emitting unit such as a light emitting diode (LED), and a power supply line for supplying power to the light emitting unit is assembled between a base and a base mounting unit having a housing for housing the light emitting unit. A light bulb-shaped lamp has been proposed in which the base is screwed to the base mounting portion in such a manner as to be held between the two (see Patent Document 1).

An example of this type of bulb-shaped lamp is shown in FIGS. 11 (a) and (b). FIG. 11B is an enlarged perspective view of a portion surrounded by an alternate long and short dash line B1 in FIG.

As shown in FIGS. 11A and 11B, the lamp 1000 includes a casing 1010 formed of a metal in a cylindrical shape, and a light emitting unit disposed on one end side of the casing 1010 in the cylinder axial direction ( A power supply circuit 1020 for supplying power to the power source, a globe 1040 attached so as to cover the light emitting portion at one end of the housing 1010 in the cylinder axial direction, and the power source disposed inside the housing 1010 A circuit holder 1060 for housing the circuit 1020 and a bottom end attached to a portion (hereinafter referred to as a “cap attachment portion”) 1063 of the circuit holder 1060 projecting from the other end of the housing 1010 to the outside of the housing 1010 A cylindrical base 1050 and an insulating member 1052 interposed between the housing 1010 and the base 1050 are provided.

Here, the base 1050 is composed of a shell 1050a constituting a side wall, an eyelet 1050c disposed substantially at the center of the bottom, and an insulator portion 1050b interposed between the shell 1050a and the eyelet 1050c. A screw groove 1051a (see FIG. 12) is provided spirally on the inner peripheral surface of the shell 1050a. On the other hand, on the outer peripheral surface 1063a of the mouthpiece attachment portion 1063, a helical screw thread 1061 capable of being screwed into the screw groove 1051a is provided in a protruding manner. In the screw thread 1061, two notches 1060 a are provided along the axial direction of the mouthpiece attaching portion 1063. Further, two power supply lines 1023 a and 1023 b for receiving power supply from the base 1050 are led out from the power supply circuit 1020.

Here, the power supply line 1023a is drawn from the opening 1066 of the mouthpiece attachment portion 1063 through the inside of the mouthpiece attachment portion 1063 and is folded back from the opening 1066 toward the outer peripheral surface 1063a of the mouthpiece attachment portion 1063 and intersects the screw thread 1061. It is disposed along the outer peripheral surface 1063a of the mouthpiece attachment portion 1063 so as to pass through the inside of the notch 1060a. The power supply wire is generally a coated wire in which a core wire is coated with an insulating material. In the power supply line 1023 a, the portion where the insulator is peeled off and the core wire is exposed is disposed along the outer peripheral surface 1063 a of the mouthpiece attachment portion 1063. On the other hand, the power supply line 1023 b is soldered to the eyelet portion 1050 c.

Then, by screwing the screw groove 1051a of the shell 1050a to the screw thread 1061 of the mouthpiece attachment portion 1063 (see arrow AR1 in FIG. 11), the power supply line 1023a is sandwiched between the mouthpiece attachment portion 1063 and the mouthpiece 1050. The base 1050 is attached to the base attachment portion 1063 in a state where

JP, 2010-153220, A

By the way, as shown in FIG. 11B, a notch 1060a is formed in the screw thread 1061 and the power supply line 1023a is placed on the notch 1060a. On the other hand, as shown in FIG. 12, the power supply line 1023a has a height R from the deepest part 1061c of the notch 1060a to the central axis of the power supply line 1023 from the deepest part 1061c of the notch 1060a to the top 1061b of the screw thread 1061. The part of the power supply line 1023 a protrudes from the top portion 1061 b of the screw thread 1061. Then, in a state in which the screw cap 1050 is screwed to the screw cap mounting portion 1063, the shell 1050a abuts on a portion (see area P1 in FIG. 12) projecting from the top portion 1061b of the screw thread 1061 in the extension direction of the power supply line 1023a. . Therefore, when the base 1050 is tightened again, the shell 1050a moves in the direction of the arrow A1 in FIG. As a result, the shell 1050a is brought into pressure contact with the power supply line 1023a, and mechanical and electrical connection between the shell 1050a and the power supply line 1023a is established.

However, in the lamp 1000, when the base 1050 is retightened, the shell 1050a is in sliding contact with the power supply line 1023a, and a force is applied to the power supply line 1023a in the extending direction of the screw thread 1061 (arrow AR2 in FIG. 13A). reference). Then, as shown in FIG. 13B, the power supply line 1023a rides on the top portion 1061b of the screw thread 1061. If the cap 1050 is tightened again in this state, the cap 1050 is distorted and deformed. Thus, if the base 1050 is deformed, the base 1050 will be difficult to fit in a socket such as a lighting fixture.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a lamp capable of preventing deformation of a base during a process of assembling the lamp.

In order to achieve the above object, the lamp according to the present invention is formed into a light emitting portion, a power supply line constituting a power supply path to the light emitting portion, and a cylindrical shape with a bottom and a screw groove is provided on the inner peripheral surface. The base has a base and a base mounting portion to which the base is attached, and a housing for housing the light emitting unit. The base mounting portion has a cylindrical shape and a screw thread that can be screwed into a screw groove on the outer peripheral surface. Protrusively provided, a plurality of notches are formed side by side in the cylinder axis direction in the screw thread, and the power supply line is folded back from the open end of the mouthpiece mounting portion to the outer peripheral surface side through the inside of the mouthpiece mounting portion, It is disposed in a state where it passes through the inside of each notch, and in that state is sandwiched between the mouthpiece attachment portion and the mouthpiece, and further, the central axis of the power supply line present in the notch is lower than the top of the screw mountain In position.

According to this configuration, when the base is screwed to the base mounting portion, the power supply line is folded back to the outer peripheral surface of the base mounting portion and is disposed to pass through the inside of each notch, and between the base mounting portion and the base Caught in Then, in a state where the power supply line is disposed inside the cutout, the base of the base is attached by the central axis of the power supply line being at a lower position in the height direction of the screw compared to the top of the screw. When screwing to a part, even if a force is applied to the power supply line in a direction along the screw, the power supply line can be prevented from running on the screw pile, so the power supply line is screwed up during the lamp assembly process. It is possible to prevent the deformation of the mouthpiece due to retightening the mouthpiece in a state where it rides on the top of the.

The lamp which concerns on embodiment is shown, (a) is a disassembled perspective view, (b) is the enlarged view of the principal part enclosed with the dashed-dotted line B1 in (a). Sectional view of the lamp according to the embodiment The lamp which concerns on embodiment is shown, (a) is principal part sectional drawing, (b) is the figure which expanded the part enclosed with dashed-dotted line B2 in (a), (c) is the direction which saw (b), Is a cross-sectional view seen from the orthogonal direction It is a figure for demonstrating the principal part of the lamp | ramp which concerns on embodiment, (a) is principal part sectional drawing of the lamp | ramp which concerns on embodiment, (b) is principal part sectional drawing of the lamp which concerns on a comparative example. The lamp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a) The lamp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a) The lamp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a) The lamp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a) The lamp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a) The lamp which concerns on a modification is shown, (a) is principal part sectional drawing, (b) is sectional drawing seen from the direction orthogonal to the direction which looked at (a) The lamp which concerns on a prior art example is shown, (a) is a disassembled perspective view, (b) is the enlarged view of the principal part enclosed with the dashed-dotted line B1 in (a). The lamp which concerns on a prior art example is shown, (a) is principal part sectional drawing, (b) is the figure which expanded the part enclosed with dashed-dotted line B2 in (a). The lamp which concerns on a prior art example is shown, (a) is a perspective view, (b) is principal part sectional drawing

Embodiment
<Structure>
Hereinafter, the structure of the lamp 1 according to the present embodiment will be described.

FIG. 1 (a) is an exploded perspective view of the lamp 1, and FIG. 1 (b) is an enlarged view of a main part surrounded by an alternate long and short dash line B1 in FIG. 1 (a). FIG. 2 is a cross-sectional view of the lamp 1. In FIG. 2, it is assumed that an alternate long and short dash line drawn along the vertical direction of the drawing shows the lamp axis J of the lamp, the upper part of the drawing is the front of the lamp 1 and the lower part of the drawing is the rear of the lamp 1. Further, in this specification, “in a plan view” means the case of looking in the rear direction of the lamp 1 from the front of the lamp 1.

As shown in FIG. 1A and FIG. 2, the lamp 1 has a cylindrical housing 10, a base 12 disposed in the front end 10 a of the housing 10, and a base 12. A light emitting module 14 disposed on the upper side, a first reflecting member 16 mounted on a module substrate 14 a constituting a part of the light emitting module 14, and a second reflecting member 18 disposed inside the reflecting member 16 A power supply circuit 20 disposed inside the housing 10 for supplying power to the light emitting module 14, a globe 40 attached to the front end 10a of the housing 10 so as to cover the light emitting module 14, and a power supply circuit 20. Power supply lines 23a and 23b derived from the circuit holder 60 housing the power supply circuit 20, and a portion of the circuit holder 60 that protrudes from the rear side of the case 10 to the outside of the case 10 (hereinafter referred to as "die mounting portion" Name) attached to And a bottomed cylindrical cap 50. Here, a housing for housing the light emitting module 14 from the housing 10, the globe 40 and the circuit holder 60 is configured.

<Case>
The housing 10 is formed in a cylindrical shape by a metal such as aluminum, and has a cylindrical shape which is open at both ends and reduced in diameter from the front to the rear. Further, the base 12 and the opening side end 41 of the globe 40 are accommodated in the front side end 10 a of the housing 10. The housing 10 is not limited to one formed of metal, and may be formed of a conductive resin or the like.

<Base>
The base 12 has a disk shape in which a through hole 12a having a circular shape in plan view is penetrated at a substantially central portion. The base 12 is disposed such that the axis of the through hole 12 a coincides with the lamp axis J. Therefore, the front surface and the rear surface of the base 12 orthogonal to the lamp axis J are both substantially annular. The outer peripheral side surface 12 b of the base 12 is tapered according to the shape of the inner peripheral surface 10 b of the housing 10, and is in surface contact with the inner peripheral surface 10 b of the housing 10. The light emitting module 14, the first reflecting member 16 and the second reflecting member 18 are disposed on the front side of the base 12. The light emitting module 14, the first reflecting member 16 and the second reflecting member 18 are fastened together to the base 12 by, for example, screws. The base 12 is formed of a metal such as aluminum. The base 12 is not limited to one formed of metal, and may be formed of a heat conductive resin or the like.

<Light emitting module>
The light emitting module 14 includes a module substrate 14 a and a plurality of light emitting units 14 b disposed on the module substrate 14 a. The light emitting portion 14 b is formed by sealing the semiconductor light emitting element with a sealing body. Here, the semiconductor light emitting element is an LED for emitting blue light, and the sealing body is made of a silicone resin mixed with phosphor particles for converting the wavelength of blue light into yellow light. Then, a part of the blue light emitted from the semiconductor light emitting element is wavelength-converted to yellow light by the sealing body, and white light generated by mixing the unconverted blue light and the converted yellow light is the light emitting portion 13 It is emitted from The light emitting unit 14 b may use, for example, an EL element (electric luminescence element).

The module substrate 14a is formed in a substantially annular shape, and has a tongue portion 14c extending inward from one position of the inner peripheral edge. The tongue piece 14c is provided with a power supply terminal 14d for supplying power, which is supplied from the power supply circuit 20, to the light emitting unit 14b.

<First Reflective Member>
The first reflection member 16 includes a substantially cylindrical main body portion 16a opened on both sides, and a substantially annular attachment portion 16b provided at the rear open end of the main body portion 16a. Here, the main body portion 16 a has a substantially cylindrical shape having a larger outer diameter on the front side than on the rear side, and the cylinder axis thereof coincides with the lamp axis J. The outer peripheral surface of the main body portion 16a is substantially annular when the front side is viewed from the rear side along the lamp axis J, and the front side of the plurality of light emitting portions 14b annularly disposed on the module substrate 14a Cover a part. Moreover, the 2nd reflection member 18 is arrange | positioned inside the attachment part 16b. The first reflection member 16 is formed of a resin such as polycarbonate. The first reflection member 16 may be made of metal or the like.

<Second reflective member>
The second reflection member 18 includes a substantially cylindrical main body portion 18a and a bottomed cylindrical lid portion 18b closing the front side opening of the main body portion 18a. On the front side of the outer peripheral surface of the main body portion 18a, a collar portion 18c projecting in a direction perpendicular to the lamp axis J direction is formed over the entire circumference. Thereby, the main body portion 18a can reflect the light emitted from the light emitting portion 14b in the direction orthogonal to the lamp axis J on the outer peripheral surface.

<Power supply circuit>
The power supply circuit 20 is for supplying power to the light emitting module 14, and includes a circuit board 20a and various electronic components 20b mounted on the circuit board 20a. The power supply circuit 20 is housed in the circuit holder 60 and fixed to the circuit holder 60 by screwing, bonding, engagement or the like.

Further, from the power supply circuit 20, power supply lines 23a and 23b for receiving the power supply from the base 50 are derived. The power supply lines 23a and 23b and the twisted pair wiring 24 are formed of a coated electric wire in which a metal core wire is covered with an insulating material, and is formed in a circular shape in cross section. Further, from the power supply circuit 20, a twist pair wiring 24 for supplying power to the light emitting module 14 is derived. The twisted pair wiring 24 is inserted into the through hole 12 a of the base 12 and connected to the power supply terminal 14 d of the module substrate 14 a.

<Globe>
The globe 40 has a shape that simulates a bulb of an A-shaped bulb that is a general bulb shape, and the light emitting module 14 is obtained by press-fitting the opening side end 41 of the globe 40 into the front side end 10 a of the housing 10. It is being fixed to the housing | casing 10 in the state which covered the front of. In addition, the shape of the glove 40 is not limited to the shape which imitated the bulb | ball of A-shaped light bulb, What kind of shape may be sufficient. Furthermore, the lamp 1 may be configured not to include a glove. The glove 40 may be fixed to the housing 10 by an adhesive or the like.

The inner surface of the globe 40 is subjected to a diffusion process (for example, a diffusion process using silica, a white pigment, or the like) for diffusing light emitted from the light emitting module. The light incident on the inner surface 42 of the glove 40 is transmitted through the glove 40 and taken out of the glove 40.

<Cap>
The base 50 is a member for receiving power from the light fixture socket when the lamp 1 is attached to the light fixture and turned on. The type of the base 50 is an E26 base which is an Edison type. The base 50 includes a substantially cylindrical shell 50a, an eyelet 50c disposed substantially at the center of the bottom, and an insulator portion 50b interposed between the shell 50a and the eyelet 50c.

Here, the power supply line 23a is electrically connected to the shell 50a in a state where the portion where the insulator is peeled off and the core wire inside is exposed contacts the shell 50a. The details of the structure for electrically connecting the power supply line 23a to the shell 50a will be described later. The power supply line 23b is electrically connected to the eyelet 50c by soldering.

FIG. 3A shows a cross-sectional view of the base 50. As shown in FIG. 3A, a screw groove 51a is provided on the inner peripheral surface of the shell 50a of the base 50. Further, on the outer peripheral surface of the shell 50a, a male screw portion in which a portion corresponding to the screw groove 51a is a screw thread is provided.

In addition, the insulator portion 52 is interposed between the base 50 and the housing 10 in a state of being fitted to the base attachment portion 63. The insulating member 52 is annularly formed of an insulating material such as a synthetic resin.

<Circuit holder>
The circuit holder 60 has a substantially cylindrical shape with both sides open. The circuit holder 60 is continuous with the main body 65 located inside the housing 10, the lid 67 covering the front opening of the main body 65, and the rear end of the main body 65, and the rear side of the housing 10 And a mouthpiece attaching portion 63 projecting outward from the above. The circuit holder 60 is formed of an insulating material such as a synthetic resin.

Here, a through hole 67 a penetrating in the thickness direction is provided in a substantially central portion of the lid portion 67, and the twisted pair wiring 24 derived from the power supply circuit 20 is inserted. The twisted pair wiring 24 is further inserted through the through hole 12 a of the base 12 and connected to the power supply terminal 14 d provided on the module substrate 14 a.

Most of the power supply circuit 20 is accommodated in the main body 65. On the other hand, the mouthpiece attachment portion 63 positioned on the rear side of the main body portion 65 has the opening 66 on the rear side closed by the mouthpiece 50 being externally fitted. Further, a part of the power supply circuit 20 is housed inside the mouthpiece mounting portion 63.

A screw thread 61 capable of being screwed into the screw groove 51 a of the screw cap 50 is provided in the screw cap mounting portion 63. Then, the screw groove 51a on the inner peripheral surface of the shell 50a of the base 50 is screwed into the screw thread 61 of the base mounting portion 63 (see the arrow AR1 in FIG. 1A). Attached to

Further, as shown in FIG. 1 (b), two notches 60 a are provided in the screw thread 61 along the axial direction of the base attachment 63.

Here, FIG. 3 (b) shows an enlarged view of a region surrounded by a dashed dotted line B2 in FIG. 3 (a), and in FIG. 3 (c), a direction orthogonal to the direction of viewing the cross section of FIG. 2 shows a cross-sectional view as viewed from the side.

As shown in FIG. 3C, in the notch 60a, the width dimension WD in the extension direction of the screw thread 61 is larger than the external dimension of the power supply line 23a.

Here, the power supply line 23a is drawn from the opening 66 of the mouthpiece attachment portion 63 through the inside of the mouthpiece attachment portion 63 and bent back from the opening 66 to the outer peripheral surface 63a side of the mouthpiece attachment portion 63 and intersects the screw thread 61. And it is arrange | positioned along the outer peripheral surface 63a of the nozzle | cap | die attaching part 63 in the form which passes along the inner side of the notch 60a. Then, when the base 50 is screwed into the base attachment portion 63, the power supply line 23 a is sandwiched between the base attachment portion 63 and the base 50. Here, the portion of the power supply wire 23a which is sandwiched between the mouthpiece attachment portion 63 and the mouthpiece 50 is a portion where the insulating material is peeled off and the outer surface of the core wire is exposed.

Further, a slit 63b1 having a width substantially the same as the outer diameter of the power supply line 23a and a slit 63b1 continuous with the slit 63b1 at a part of the rear side end 63c of the mouthpiece attachment portion 63 A guide portion 63b2 is formed to guide the line 23a into the slit 63b1.

Here, as shown in FIGS. 3B and 3C, the central axis of the power supply line 23a is lower than the top 61b of the screw thread 61 in the height direction A2 of the screw thread 61. . In other words, the height R (radius of the power supply line 23a) from the deepest part 61c of the notch 60a to the central axis of the power supply line 23 is higher than the height T from the deepest part 61c of the notch 60a to the top of the screw mountain 61 Also, the power supply line 23 a does not protrude outside the top 61 b of the screw thread 61. Then, in a state in which the cap 50 is screwed to the cap mounting portion 63, an area between the two screw threads 61 adjacent to each other in the cylinder axial direction of the cap mounting portion 63 is the inner circumferential surface of the shell 50a (a region in FIG. Contact the power supply line 23a at P2). Here, when the base 50 is tightened again, the shell 50a moves in the direction of the arrow A1 in FIG. Thus, the shell 50a and the power supply line 23a are electrically connected in a state where the shell 50a is in pressure contact with the power supply line 23a.

By the way, in the lamp 1, when the base 50 is tightened again, the shell 50a is in sliding contact with the power supply line 23a, and a force is applied to the power supply line 23a in the extending direction of the screw thread 61. On the other hand, in the lamp 1, the central axis of the power supply line 23 a is at a lower position in the height direction A 2 of the screw thread 61 compared to the top 61 b of the screw thread 61. Movement in the circumferential direction is restricted by Thus, the power supply line 23a can be prevented from running on the screw thread 61, so that the cap 50 is additionally tightened in a state where the power supply line 23a is sandwiched between the insulating member 52 and the upper end edge of the shell 50a. Can prevent the base 50 from being deformed.

Further, as shown in FIG. 3, in the lamp 1, in the outer peripheral surface of the mouthpiece mounting portion 63, the skirt portion (the outer circumference surface of the mouthpiece mounting portion 63) 63 a of the screw thread 61 and the deepest portion 61 c of the notch 60 a are screws. They coincide in the height direction of the mountain 61. That is, the site where the power supply line 23a is placed is flat. Thus, the contact area between the outer peripheral surface 63a of the mouthpiece attachment portion 62 and the power supply line 23a can be increased as compared to the lamp 1000 (see FIGS. 11 to 13). On the other hand, the frictional force against the force applied in the extension direction of the screw thread 61 is increased. Accordingly, the movement of the power supply line 23a in the extension direction of the screw thread 61 can be strongly restricted.

Furthermore, as shown in FIG. 3, in the lamp 1, both side surfaces 61 a in the direction along the screw thread 61 of the notch 60 a are orthogonal to the outer peripheral surface 63 a of the mouthpiece mounting portion 63.

FIG. 4A is an enlarged view of the notch 60a of the lamp 1 according to the present embodiment, and FIG. 4B is an enlarged view of the notch 560a of the lamp according to the comparative example. Here, as shown in FIG. 4A, in the case of the lamp 1, both side surfaces 61 a in the direction along the screw thread 61 of the notch 60 a are orthogonal to the outer peripheral surface 63 a of the mouthpiece mounting portion 63. That is, the inclination angle θ1 of the side surface 61a with respect to the outer peripheral surface 63a is approximately 90 °. Therefore, even if force PW1 of a predetermined magnitude is applied to power supply line 23a in the extending direction of screw thread 61, the force component applied to power supply line 23a in the height direction of screw thread 61 is substantially zero. It has become. On the other hand, as shown in FIG. 4B, in the case of the lamp according to the comparative example, both side surfaces 561a in the direction along the screw thread 561 of the cutout portion 560a are inclined with respect to the outer peripheral surface 563a of the mouthpiece mounting portion 563. There is. That is, the inclination angle θ2 of the side surface 561a with respect to the outer peripheral surface 563a is 90 ° or less. Therefore, when a force PW1 of a predetermined magnitude is applied to the power supply line 23a in the extending direction of the screw thread 61, a force component PW2 applied in the height direction of the screw thread 61 to the power supply line 23a is generated. The power supply line 23a moves upward along the side surface 561a.

As described above, when power PW1 is applied to power supply line 23a in the extending direction of screw thread 61, in the direction along screw thread 561 of notch 560a as in the comparative example shown in FIG. 4 (b). The force PW2 applied in the height direction of the screw thread 61 is extremely small (approximately zero) as compared with a configuration in which both side surfaces 561a are tapered with respect to the outer peripheral surface 563a of the mouthpiece attachment portion 563. Therefore, it is difficult for the power supply line 23a to run on the screw pile 61.

By the way, as described above, in the lamp 1, the slit 63 b 1 and the guide portion 63 b 2 continuous with the slit 63 b 1 are formed in a part of the rear end portion 63 c of the mouthpiece attaching portion 63. As a result, the power supply line 23a is fixed to the front end of the slit 63b1, and it is not necessary for the operator to hold the power supply line 23a against the outer peripheral surface 63a of the mouthpiece mounting portion 63 in the assembly process of the lamp 1. The efficiency of the assembling work of the lamp 1 can be improved. Further, by fixing the power supply line 63a to the front end portion of the slit 63b1, it is possible to prevent the position of the power supply line 23a from moving when the base 50 is screwed to the base attachment portion 63. Furthermore, by having the guide portion 63b2 continuous to the slit 63b1, the work of fitting the power supply line 23a into the slit 63b1 becomes easy, so that the efficiency of the assembling work of the lamp 1 can be improved.

<Modification>
(1) In the embodiment, although the example in which the plurality of notches 60a are provided in the screw thread 61 has been described, the present invention is not limited to this. For example, as shown in FIG. 5, the groove 64 may be formed to pass through the bottom of the notch 60 a in the outer peripheral surface of the mouthpiece mounting portion 63. In this case, even if the radius of the cross-sectional circular power supply line 23a is larger than the height of the screw thread 61, the height T1 from the bottom of the groove 64 to the top 61b of the screw thread 61 It can be made higher than the height R to the central axis. Thus, the central axis of the power supply line 23a is at a lower position in the height direction A2 of the screw thread 61 than the top portion 61b of the screw thread 61, so the power supply line 23a is an extension of the screw thread 61 by the screw thread 61. It is possible to further suppress that the movement in the direction is restricted and the power supply line 23a gets on the screw mountain 61.

(2) In the modification described in (1), the example in which the groove 64 is formed in a rectangular shape in cross section has been described, but the present invention is not limited to this. For example, as shown in FIG. 6, the groove 264 may be formed in a triangular shape in cross section. Here, the height T2 from the deepest part 264c of the groove 264 to the top 61b of the screw thread 61 is higher than the height R2 from the deepest part 264c of the groove 264 to the central axis of the power supply line 23. Thus, the central axis of the power supply line 23a is at a lower position in the height direction A2 of the screw thread 61 than the top portion 61b of the screw thread 61, so the power supply line 23a is an extension of the screw thread 61 by the screw thread 61. Movement in the direction is restricted.

In addition, the groove 264 is formed in a triangular shape in cross section, whereby the power supply line 23 a is guided to a substantially central portion of the groove 264. Therefore, the power supply line 23a is less likely to move in the groove 264 as compared with the configuration in which the bottom of the groove 64 is flat (see FIG. 5), so that generation of torsion in the power supply line 23a can be suppressed.

Further, as shown in FIG. 7, the groove 364 may be formed in a wedge shape in cross section. Here, the height T3 from the deepest portion 364c of the groove 364 to the top portion 61b of the screw thread 61 is higher than the height R3 from the deepest portion 364c of the groove 364 to the central axis of the power supply line 23a.

(3) In the embodiment, an example in which the cutaway portion 60a is formed in a rectangular shape in cross section has been described, but the present invention is not limited to this. For example, as shown in FIG. 8, the bottom of the notch 260a may have an inclined surface. In this case, the power supply line 23a is guided along the inclined surface of the notch 260a to the approximate center of the notch 260a. Therefore, the power supply line 23a is less likely to move within the cutaway section 260a as compared with the configuration in which the bottom of the cutaway section 60a (the deepest part 61c of the cutaway section 60a) is flat (see FIG. 3). Can be suppressed. Here, the height T4 from the deepest portion 261c of the notch portion 260a to the top portion 61b of the screw thread 61 is higher than the height R4 from the deepest portion 261c of the notch portion 260a to the central axis of the power supply line 23a.

(4) In the embodiment, on the outer peripheral surface of the mouthpiece attachment portion 63, the bottom of the screw thread 61 (the outer circumference surface of the mouthpiece attachment portion 63) 63a and the deepest portion 61c of the notch 60a Although an example in which the directions match (that is, the portion where the power supply line 23a is placed is flat) has been described, the present invention is not limited to this. For example, as shown in FIG. 9, the projection 65 may be provided at a portion other than the notch 60 a in the skirt portion (the outer peripheral surface of the mouthpiece attachment portion 63) 63 a of the screw thread 61. In this case, with the cap 50 screwed to the cap mounting portion 63, the inner peripheral surface of the shell 50a is the power supply line 23a in the region between the two threads 61 adjacent in the axial direction of the cap mounting portion 63. Since the contact easily occurs, it is possible to suppress the occurrence of the contact failure between the base 50 and the power supply line 23a.

(5) In the embodiment, the example in which the thickness of the shell 50a of the base 50 is uniform has been described, but the present invention is not limited to this. For example, as shown in FIG. 10, the thickness of the portion 50a2 in contact with the power supply line 23a may be thicker than the thickness of the bottom portion 50a1 of the screw groove 51a. In this case, a region between two screw grooves 51a adjacent to each other in the cylinder axial direction of the sleeve 50 on the inner peripheral surface of the shell 50a (see region P3 in FIG. 10). ) Makes it easy to abut the power supply line 23a, so that the occurrence of contact failure between the base 50 and the power supply line 23a can be suppressed.

(6) In the embodiment, an example is described in which the cutaway portion 60a is orthogonal to the outer peripheral surface 63a of the mouthpiece attachment portion 63 in the direction along the screw thread 61, but is limited thereto is not. The inclination angle of the side surface 61a with respect to the outer peripheral surface 63a is such that the power supply line 23a does not run on the screw pile 61 even when a force is applied to the power supply line 23a in the extension direction of the screw pile It may be designed at an angle.

(7) In the embodiment, the example in which the two notches 60a are provided along the cylinder axis direction of the mouthpiece attachment portion 63 in the screw thread 61 has been described, but the present invention is not limited to this. For example, the two notches 60a may be offset from each other in the circumferential direction of the mouthpiece attachment portion 63.

(8) In the embodiment, an example in which the lamp 1 is a so-called LED lamp using an LED has been described, but the present invention is not limited to this. For example, other lamps such as a fluorescent lamp and an electrodeless discharge lamp It may be.

(9) In the embodiment, an example in which the housing includes the housing 10, the globe 40, and the circuit holder 60 has been described. However, other configurations are possible as long as the light emitting module 14 can be accommodated and the base attachment portion is provided. It may be a configuration. For example, the configuration may be such that the circuit holder 60 is exposed to the outside without the housing 10. Alternatively, the housing 10, the base 20, and the circuit holder 60 have a structure integrally formed of a heat conductive resin or the like, and the structure and the globe 40 constitute a housing. It is also good.

(10) In the embodiment, although the case where the housing has a bulb shape has been described, the present invention is not limited to this. For example, the shape of a spotlight such as a halogen lamp with a reflecting mirror or a lamp for downlight use may be simulated.

REFERENCE SIGNS LIST 1 lamp 10 housing 12 base 14 light emitting module 14 b light emitting unit 16 first reflecting member 18 second reflecting member 20 power circuit 23 a, 23 b power wire 24 twisted pair wiring 40 globe 50 clasp 50 a shell 50 b insulator portion 50 c eyelet 51 a screw groove 52 insulation member 60 circuit holder 60a notch 61 screw thread 61a side 61b top 61c deepest part 63a foot (peripheral surface)
66 opening

Claims (8)

A light emitting unit,
A power supply line that constitutes a power supply path to the light emitting unit;
A base formed in a bottomed cylindrical shape and provided with a screw groove on an inner circumferential surface,
It has a mouthpiece attaching part to which the above-mentioned mouthpiece is attached, and it has a housing which stores the above-mentioned light-emitting part inside,
The screw cap has a cylindrical shape, and a screw thread which can be screwed into the screw groove is projected on the outer peripheral surface,
In the screw thread, a plurality of notches are formed in line in the cylinder axis direction,
The power supply line is folded back from the open end of the mouthpiece mounting portion to the outer peripheral surface side through the inside of the mouthpiece mounting portion, and is disposed in a state passing through the inside of each of the notches. Be sandwiched between the base and
Furthermore, the central axis of the power supply line present in the notch is lower than the top of the screw. The lamp according to claim 1, wherein the plurality of cutouts are arranged along a cylinder axial direction of the mouthpiece mounting portion. The skirt portion of the screw mountain and the deepest portion of the notch in the outer peripheral surface of the mouthpiece attachment portion coincide with each other in the height direction of the screw mountain. Description lamp. The lamp according to any one of claims 1 to 3, wherein both side surfaces in a direction along the screw thread of the notch portion are orthogonal to the outer peripheral surface of the mouthpiece mounting portion. The lamp according to claim 3, wherein a groove is formed to pass through the bottom of each of the notches in the outer peripheral surface of the mouthpiece mounting portion. The lamp according to claim 5, wherein the depth from the bottom of the screw thread to the deepest part of the groove is smaller than the maximum value of the outer dimension of the power supply line. The lamp according to claim 5 or 6, wherein the groove has a surface intersecting with the outer peripheral surface of the mouthpiece mounting portion. The projection portion is formed on the outer peripheral surface of the mouthpiece attachment portion at a foot portion of the screw mountain and at least a portion on which the power supply line is mounted. The lamp described in.

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