WO2008041651A1 - Acoustic device, table, and mobile terminal device - Google Patents

Abstract

Provided is an acoustic device which includes a mobile terminal device and a table and outputs a control signal for controlling an amplifier from the mobile terminal device to the table. The acoustic device (1) includes: a mobile telephone (2) having a ground terminal and a control signal output; and a cradle (3) having a ground reception terminal and a control signal input terminal. When the mobile telephone (2) is put on the cradle (3), the electric connection between the ground terminal and the ground reception terminal is made earlier than the electric connection between the control signal output terminal and the control signal input terminal.

Description

 Specification

 Acoustic device, stand, and portable terminal device

 Technical field

 [0001] The present invention relates to a mobile terminal device such as an audio device, a cradle, and a mobile phone.

 Background art

 Conventionally, when charging a battery of a mobile phone that is a mobile terminal device, the mobile phone is charged by being inserted into a table. By the way, in recent years, with the development of music distribution services using mobile phones, opportunities for playing music on mobile phones are increasing. In addition to playing music on a mobile phone with a speaker when carried, it is also required to play back the speaker even when it is charged.

 [0003] On the other hand, there is a stand for a mobile phone device having a charging function for charging a secondary battery of a mobile phone, an amplifying unit for amplifying an audio signal from the mobile phone, and the amplifying unit. There has been proposed a pedestal equipped with a speaker for emitting an amplified audio signal outward (see, for example, Patent Document 1).

 Patent Document 1: JP 2002-101177 A

 Disclosure of the invention

 Problems to be solved by the invention

 [0004] The pedestal of Patent Document 1 is configured to supply power from the adapter to the amplifying unit, and power is always supplied to the amplification unit. Therefore, there is a problem when power is wasted. In order to prevent this problem, it is necessary to provide a separate control circuit for the cradle. It is not preferable to place new parts on a cradle that requires downsizing, and the cradle is expensive. There was also. Further, when the control circuit is not provided on the cradle side, when the mobile terminal device is placed on the cradle, the electrical connection between the ground terminal of the mobile terminal device and the ground receiving terminal of the cradle is There was a problem that noise was generated due to the slower electrical connection between the control signal output terminal and the control signal input terminal of the pedestal.

[0005] An object of the present invention is to provide an acoustic device that includes a mobile terminal device and a pedestal having an amplification unit, and that outputs a control signal for controlling the amplification unit on the cradle side from the mobile terminal device. To do.

 [0006] Further, according to the present invention, when a portable terminal device having a ground terminal and a control signal output terminal is placed on a cradle having a ground receiving terminal and a control signal input terminal, the ground terminal and the ground receiving terminal are provided. It is an object of the present invention to provide an acoustic device configured such that the electrical connection between the control signal output terminal and the control signal input terminal is faster than the electrical connection. Means for solving the problem

 [0007] The present invention provides a pedestal comprising: an amplifying unit that amplifies an input acoustic signal; and a speaker that outputs the amplified acoustic signal output from the amplifying unit to the outside; An audio signal input to the amplifying unit and a mobile terminal device that outputs a control signal for controlling the amplifying unit to the cradle, wherein the mobile terminal device includes the audio signal An acoustic signal output terminal for outputting a signal, a control signal output terminal for outputting the control signal, and a ground terminal, and the pedestal is an acoustic signal input terminal electrically connected to the acoustic signal output terminal And a control signal input terminal electrically connected to the control signal output terminal, and a ground receiving terminal electrically connected to the ground terminal, and the portable terminal device is placed on the table When the gran Electrical connection between terminals and the ground receiving terminals, relates to an acoustic device configured to be connected before the electrical connection of the control signal output terminal and the control signal input terminal.

 [0008] The mounting table includes a concave mounting portion that receives a mounting surface of the mobile terminal device on a bottom surface, and the acoustic input terminal, the control signal input terminal, and the ground receiving terminal are as described above. It is preferable that they are respectively arranged at predetermined positions at the same height from the bottom surface of the mounting portion, and the tip of the ground receiving terminal protrudes from the tip of the control signal input terminal.

[0009] The mounting table includes a concave mounting portion that receives a mounting surface of the portable terminal device on a bottom surface, and the acoustic input terminal, the control signal input terminal, and the ground receiving terminal are as described above. The mounting surface is disposed at a predetermined position at the same height from the bottom surface of the mounting portion, and the acoustic signal output terminal, the control signal output terminal, and the ground terminal are the above-described mounting surface on a surface continuous with the above-described mounting surface. And the tip of the ground terminal protrudes from the tip of the control signal output terminal. Is preferred.

 [0010] The mounting table includes a concave mounting portion that receives a mounting surface of the mobile terminal device on a bottom surface, and the acoustic input terminal, the control signal input terminal, and the ground receiving terminal are as described above. It is preferable that the bottom surface force and the height of the ground receiving terminal are higher than the height of the control signal input terminal from the bottom surface.

 [0011] The mounting table includes a concave mounting portion that receives a mounting surface of the mobile terminal device on a bottom surface, and the acoustic input terminal, the control signal input terminal, and the ground receiving terminal are as described above. The acoustic signal output terminal, the control signal output terminal, and the ground terminal are respectively disposed on a surface continuous with the mounting surface, and the mounting surface of the ground terminal. The distance from the control signal output terminal is preferably shorter than the distance from the mounting surface described above.

 [0012] Preferably, the mobile terminal device includes a charging terminal for a secondary battery, and the pedestal includes a power feeding terminal electrically connected to the charging terminal.

 [0013] The mobile terminal device includes a control unit, a playback unit, and a speaker. When the mobile terminal device is placed on the pedestal, the playback unit transmits a low-frequency sound signal to the sound source. It is preferable to output to the signal output terminal and output as sound waves from the speaker of the pedestal, and to output the sound signals of the high frequency range and the middle frequency range outward from the speaker of the portable terminal device.

 [0014] The present invention provides a concave mounting portion that receives the mounting surface of the mobile terminal device at the bottom surface, and the mobile terminal device that is disposed at a predetermined position at the same height from the bottom surface of the mounting portion. An acoustic signal input terminal electrically connected to the acoustic signal output terminal, a control signal input terminal electrically connected to the control signal output terminal of the portable terminal device, and a ground terminal of the portable terminal device A ground receiving terminal connected to each other, and the tip of the ground receiving terminal relates to a mounting base protruding from the tip of the control signal input terminal.

[0015] Preferably, the tip of the ground receiving terminal protrudes from the tip of the acoustic signal input terminal. [0016] The present invention is electrically connected to a concave mounting portion that receives the mounting surface of the mobile terminal device at the bottom surface, and an acoustic signal output terminal of the mobile terminal device that is disposed on a side surface of the mounting portion. An acoustic signal input terminal, a control signal input terminal electrically connected to a control signal output terminal of the mobile terminal device, a ground receiving terminal electrically connected to a ground terminal of the mobile terminal device, Each of the ground receiving terminals has a height from the bottom surface that is higher than a height of the control signal input terminal from the bottom surface.

 [0017] Preferably, the height of the ground receiving terminal from the bottom surface is higher than the height of the acoustic signal input terminal from the bottom surface! /.

 [0018] The present invention includes an acoustic signal output terminal that outputs an acoustic signal, a control signal output terminal that outputs the control signal, and a ground terminal, and the acoustic signal output terminal and the control signal output The terminal and the ground terminal are respectively arranged at predetermined positions at the same distance from the mounting surface on a surface continuous with the mounting surface mounted on the mounting table, and the tip of the ground terminal is The present invention relates to a portable terminal device that protrudes from a tip of the control signal output terminal.

[0019] The present invention includes an acoustic signal output terminal that outputs an acoustic signal, a control signal output terminal that outputs the control signal, and a ground terminal, and the acoustic signal output terminal and the control signal output The terminal and the ground terminal are disposed on a surface that is continuous with the mounting surface mounted on the mounting table, and the distance from the mounting surface of the ground terminal is the same as that of the control signal output terminal. The present invention relates to a mobile terminal device shorter than a distance from a surface.

 In the present invention, in calculating the height and distance from each terminal of the control signal input terminal, the ground receiving terminal, and the acoustic signal input terminal to the bottom surface of the mounting portion, for example, the bottom surface is curved. In such a case, assume a plane parallel to the horizontal plane that touches the apex of the curved part, and the height and distance from this plane to each terminal! /

In the present invention, in calculating the distance from each terminal of the control signal output terminal, the ground terminal, and the acoustic signal output terminal to the mounting surface, for example, when the mounting surface is curved, Assuming a plane that is in contact with the apex of the curved portion and parallel to the horizontal plane as the mounting surface, the distance from this mounting surface to each terminal is described. The invention's effect

 [0022] According to the present invention, it is possible to provide an acoustic device that includes a portable terminal device and a pedestal having an amplifying unit, and that outputs a control signal for controlling the amplifying unit on the portable terminal device. .

 [0023] Further, the amplification unit of the cradle can be driven by the mobile terminal device being placed on the cradle based on the control signal output from the control signal output terminal of the mobile terminal device. Wasteful power consumption can be reduced.

 [0024] When a portable terminal device having a ground terminal and a control signal output terminal is placed on a cradle having a ground receiving terminal and a control signal input terminal, the electrical connection between the ground terminal and the ground receiving terminal is performed. It is possible to provide an acoustic device that is configured such that the mechanical connection is made earlier than the electrical connection between the control signal output terminal and the control signal input terminal. Therefore, it is possible to suppress the generation of noise from the speaker when placing the mobile terminal device on the cradle.

 Brief Description of Drawings

 FIG. 1 is an external perspective view of an acoustic device according to an embodiment of the present invention.

 [Fig. 2] An external perspective view of the mobile phone opened.

 FIG. 3 shows an external perspective view of the cellular phone folded.

 [Figure 4] A perspective view of the cradle is shown.

 FIG. 5 is a diagram illustrating a cross section of the cradle of FIG.

 FIG. 6 is a diagram illustrating a mechanism in which a cradle side terminal group in a cradle projects.

 FIG. 7 is a block diagram illustrating the electrical configuration of the acoustic device.

 FIG. 8 is a flowchart for explaining the operation of the acoustic device.

 Explanation of symbols

[0026] 1 Acoustic device

 2 Mobile phone

 3 Clade Nore

 20 Mounting surface

 21 Operation side housing

22 Display side housing 31 Place

 32 Holding member

 33 Bottom (bottom of mounting part 31)

 41a Acoustic signal input terminal

 41b Control signal input terminal

 41c Feeding terminal

 41d Ground receiving terminal

 50 Bottom (bottom of cradle 3)

 61a Acoustic signal output terminal

 61b Control signal output terminal

 61c charging terminal

 61d Ground terminal

 220 Control unit

 250 speakers (cell phone 2 side)

 310 Amplifier

 320 Speaker (cradle 3 side)

 330 Power terminal

 BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Hereinafter, the power S for explaining a mobile phone as a mobile terminal device, the present invention is not limited to this, and other mobile terminals such as a personal digital assistant (PDA), a notebook computer, a digital camera, and a small audio player It may be a device. Moreover, although the cradle which mounts a portable terminal device on an upper surface as a pedestal is demonstrated as an installation stand, this invention is not limited to this, The aspect which mounts a portable terminal device is not limited to this. It may be a different cradle.

FIG. 1 shows an external perspective view of an acoustic device 1 according to an embodiment of the present invention. As shown in FIG. 1, an acoustic device 1 according to the present embodiment includes a foldable mobile phone 2 as a mobile terminal device and a cradle 3 as a dome-shaped table. In the folded state The mobile phone 2 is placed so as to be inserted into a placement portion 31 formed on the upper surface of the cradle 3.

 FIG. 2 shows an external perspective view in a state where the mobile phone 2 is opened. FIG. 3 shows an external perspective view of the cellular phone 2 in a folded state. As shown in FIG. 2, the mobile phone 2 includes an operation unit side body 21 having a rectangular planar shape, and a display unit side body 22 having a rectangular planar shape. The operation unit side body 21 is folded in such a manner that a voice uttered by the user of the mobile phone 2 during a call and the inner operation button group 24 disposed on the inner surface 21a that is a surface facing the display unit side body 22 in a folded state. It is equipped with a voice input unit 26 to be input and a speaker (speaker 250 in FIG. 7) for outputting linger sounds and music information. The inner operation button group 24 is a function setting operation button 24 a for operating various settings and various functions such as a phone book function and a mail function, and an input operation for inputting a telephone number and characters such as mail. The button 24b and determination operation buttons 24c for performing selection and scrolling in various operations and selecting and determining a music to be played back are configured.

 [0030] The operation unit side body 21 includes a battery (not shown) disposed on an outer surface 21b that is a surface opposite to the inner surface 21a, and a mobile phone side terminal group (not shown). The mobile phone side terminal group is composed of an acoustic signal output terminal that outputs an acoustic signal, a control signal output terminal that outputs a control signal that controls an amplification unit of the cradle 3 described later, a charging terminal, and a ground terminal. The

 [0031] The display unit side body 22 is disposed on an inner side surface 22a that is a surface facing the operation unit side body 21 in a folded state, such as a liquid crystal display or an organic EL display for displaying various information. An inner display unit 27 and a voice output unit 29 that outputs the voice of the other party of the call are provided.

 Further, the upper end portion of the operation unit side body 21 and the lower end portion of the display unit side body 22 are connected to each other via a hinge mechanism 23 so as to be opened and closed. By relatively rotating (turning) the operation unit side case 21 and the display unit side case 22 connected via the hinge mechanism 23, the mobile phone 2 is connected to the operation unit side case 21 and the display unit. The side housing 22 is in an open state (open state), or the operation unit side housing 21 and the display unit side housing 22 are folded (folded state).

FIG. 3 shows an external perspective view of the cellular phone 2 in a folded state. As shown in Figure 3, The mobile phone 2 includes a group of outer operation buttons 25 arranged on the outside in a folded state !, and an outer display unit 28 arranged substantially at the center of the outer surface 22b of the display unit side body 22. Prepare. The outer operation button group 25 is arranged so as to surround the outer display unit 28 of the display unit side body 22, and performs determination and scrolling in various operations and selection operation button 25a for selecting and determining a music to be played back. And function setting operation buttons 25b and 25c for operating various functions such as various settings, telephone book functions and mail functions. Here, the outer operation button group 25 and the outer display section 28 are exposed to the outside even when placed on the cradle 3 shown in FIG. In the present embodiment, the so-called foldable mobile phone 2 is described, but the operation unit side body 21 and the display unit side body 22 that are not foldable are overlapped. One of the cases can be slid in one direction, or one case can be rotated around an axis along the overlapping direction of the operation unit side case 21 and the display side case 22 Alternatively, a rotating (turn) type or a type (straight type) in which the operation unit side body 21 and the display unit side body 22 are arranged in one case and do not have a connecting part may be used.

 [0034] FIG. 4 shows an oblique view of the appearance of the cradle 3 as a cradle. FIG. 5 is a diagram illustrating a cross section of the cradle 3 of FIG. FIG. 6 is a diagram illustrating a mechanism in which the cradle side terminal group of the cradle 3 protrudes. As shown in FIG. 4, the cradle 3 includes a concave placement portion 31 on which the mobile phone 2 is placed, a tale dollar side terminal group 41 disposed at the same height from the bottom surface 33 of the placement portion 31, and Is provided. Here, the mobile phone 2 is placed so that the placement surface 20 in FIG. 3 is in contact with the bottom surface 33, and the outer surface 21b of the operation unit side body 21 faces the cradle side terminal group 41 side. And placed.

 [0035] As shown in FIG. 5, the cradle 3 includes a speaker (not shown) disposed inside, and a plurality of speaker holes 51 disposed on the bottom surface 50 and emitting sound waves output from the speaker outward. Yeah. The cradle 3 includes a holding member 32 that is disposed inside and holds the cradle side terminal group 41.

As shown in FIG. 6, the holding member 32 includes a protrusion 40 disposed on one end of the surface, holding portions 45 and 46 that hold the cradle-side terminal group 41, and holding portions 45 and 46. The formed clade nozzle side terminal group 41 includes openings 45a and 46a that are passed through from the back side to the front side and project, and a rotating shaft 49 that is disposed on the side surface. As shown in FIG. 5, the holding member 32 is a bearing (not shown). The rotating shaft 49 is pivotally supported by the bracket.

[0037] The cradle side terminal group 41 includes an acoustic signal input terminal 41a, a control signal input terminal 41b, a power supply terminal 41c, and a ground receiving terminal 41d. The acoustic signal input terminal 41a and the control signal input terminal 41b are disposed so as to protrude from the opening 45a, and the power supply terminal 41c and the ground receiving terminal 41d are disposed so as to protrude from the opening 46a. In the cradle-side terminal group 41, the tip of the ground receiving terminal 41d is configured to protrude to the most surface side.

 [0038] Further, each terminal constituting the cradle side terminal group 41 is formed so as to protrude to one side by bending a wire-like member, and a predetermined portion continuous with each terminal portion is shown in FIG. Is arranged so as to be wound around the outer periphery of the fixed shaft 53. Thus, each terminal elastically deforms with the fixed shaft 53 as a fixed point, and functions as a so-called panel terminal.

 As shown in FIG. 6, the cradle side terminal group 41 is arranged on the other end side with the protrusion 40 and the rotation shaft 49 interposed therebetween. The protrusion 40 and the cradle side terminal group 41 in the holding member 32 are configured to be able to protrude from the inside of the cradle 3 to the outside (inside the placement portion 31). Specifically, as shown in FIG. 5, the protrusion 40 is disposed so as to protrude from the protrusion opening 40a formed on the bottom surface of the concave mounting portion 31, and the cradle-side terminal group 41 is mounted. The terminal 31 is disposed so as to protrude from the terminal opening group 410 formed on the side surface of the portion 31. Further, the holding member 32 is urged by a urging member (not shown) in a direction in which the protruding portion 40 protrudes from the bottom surface of the placement portion 31.

[0040] Here, the operation of the holding member 32 when the mobile phone 2 is placed on the cradle 3 will be described. First, the mobile phone 2 in the folded state shown in FIG. 3 is placed so as to be inserted into the concave placement portion 31 in the cradle 3, so that the placement surface 20 of the mobile phone 2 becomes the placement portion 31. Push down the protrusion 40 that protrudes from the bottom 33 of the cradle 3 to the inside of the cradle 3. As a result, as shown in FIG. 6, the protrusion 40 side of the holding member 32 rotates about the rotation shaft 49 in the direction of arrow F1, and the opposite end of the protrusion 40 rotates in the direction of arrow F2. To do. By this rotation operation, the cradle side terminal group 41 protrudes from the side surface of the placement unit 31 into the placement unit 31 and is electrically connected to the mobile phone side terminal group. Yes

 FIG. 7 is a block diagram for explaining the electrical configuration of the acoustic device 1. As shown in FIG. 7, the acoustic device 1 is configured such that the cradle 3 performs predetermined charging on the mobile phone 2 and outputs an acoustic signal and a control signal from the mobile phone 2 to the cradle 3.

 Specifically, the mobile phone 2 includes an antenna 205 that receives high-frequency electromagnetic waves, a radio unit 210 that amplifies the received high-frequency electromagnetic waves and demodulates the received audio data, and a battery (not shown). The mobile phone 2 includes a display unit 27, 28, operation button groups 24, 25, a storage unit 230, a playback unit 240 that converts predetermined music data into an acoustic signal, and a control unit 220 that controls these. And a speaker 250 that outputs an acoustic signal from the reproduction unit 240 as a sound wave.

 [0043] The cradle 3 includes an amplifying unit 310, a speaker 320 that outputs the acoustic signal amplified by the amplifying unit 310 as a sound wave, a primary power source for supplying power to the amplifying unit 310 and charging the mobile phone 2. And a power supply terminal 330 connected via an AC adapter (not shown).

In acoustic device 1, mobile phone side terminal group 61 in mobile phone 2 and cradle side terminal group 41 in cradle 3 are electrically connected. Specifically, the cellular phone 2 includes an acoustic signal output terminal 61a that outputs an acoustic signal from the reproduction unit 240, and a control signal output terminal 61b that outputs a control signal for controlling the amplification unit 310 from the control unit 220. A charging terminal 61c for charging a battery (not shown) and a ground terminal 61d are provided. The cradle 3 supplies power supplied from the power terminal 330 to the acoustic signal input terminal 41a that inputs an acoustic signal to the amplifier 310, the control signal input terminal 41b that inputs a control signal to the amplifier 310, and the mobile phone 2. A power supply terminal 41c to be supplied and a ground receiving terminal 41d are provided. Then, the acoustic signal output terminal 61a and the acoustic signal input terminal 41a are electrically connected, the control signal output terminal 61b and the control signal input terminal 41b are electrically connected, and the charging terminal 61c and the power feeding terminal 41c are connected. Electrical connection is established, and the ground terminal 6 Id and the ground receiving terminal 4 Id are electrically connected. As a result, the acoustic signal and control signal output from the mobile phone 2 are input to the amplifying unit 310. In the cradle 3, the amplifying unit 310 is controlled by the control signal and is output as a sound wave from the amplified acoustic signal force S speaker 320. It is.

 Here, the operation of the acoustic device 1 will be described based on the flowchart of FIG. First, in step S1, the inner operation button group 24 of the mobile phone 2 shown in FIG. 2 is operated to select and determine a predetermined song from the song list displayed on the inner display unit 27, and the mobile phone 2 is loaded. To play music. As a result, the music data of the selected music stored in the storage unit 230 is converted into an acoustic signal by the playback unit 240 and is emitted by the speaker 250.

Next, in step S 2, the cellular phone 2 is folded as shown in FIG. 3 and placed on the placement unit 31 of the cradle 3 as shown in FIG. In step S3, the placement surface 20 of the mobile phone 2 pushes down the protruding portion 40 protruding from the bottom surface 33 of the placement portion 31. The cradle side terminal group 41 protrudes into the mounting portion 31 by the projection 40 being pushed down.

 [0047] By step S4, first, the ground receiving terminal 41d contacts the ground terminal 61d and is electrically connected. Subsequently, in step S5, the acoustic signal input terminal 41a is brought into contact with and electrically connected to the acoustic signal output terminal 61a. At the same time, the control signal input terminal 41b contacts and is electrically connected to the control signal output terminal 61b. At the same time, the power feeding terminal 41c is in contact with and electrically connected to the charging terminal 61c.

 [0048] In step S6, charging of a battery (not shown) in the mobile phone 2 is started, and a low-frequency sound signal is output from the playback unit 240 via the sound signal output terminal 61a under the action of the control unit 220. The signal is output to the amplification unit 310.

 [0049] Through step S7, the sound signal in the middle / high range is emitted from the speaker 250 on the mobile phone 2 side, and the sound signal in the low range is emitted from the speaker 320 on the cradle 3 side. Here, the low sound range and the mid-high sound range can be divided, for example, using ΙΚΗζ as a reference.

 [0050] In step S8, the outer operation button group 25 shown in FIG. 1 is used to select / determine a song different from the song being played while viewing the song list displayed on the outer display unit 28, and change the song. . For the changed music, the low range is emitted from the speaker 320 on the cradle 3 side, and the middle and high range is emitted from the speaker 250 on the mobile phone 2 side.

[0051] In step S9, the mobile phone 2 is separated from the cradle 3. In step S10, the acoustic signal input terminal 41a is separated from the acoustic signal output terminal 61a. At the same time, control signal The input terminal 41b is separated from the control signal output terminal 61b. At the same time, the power feeding terminal 41c is separated from the charging terminal 61c. In step S11, the ground receiving terminal 41d is finally separated from the ground terminal 6Id.

 [0052] In step 12, under the action of the control unit 220, the playback unit 240 outputs an acoustic signal in the entire range to the speaker 250 on the mobile phone 2 side. As a result, the entire sound range of the music is emitted from the speaker 250 on the mobile phone 2 side.

 According to the present embodiment, there is provided an audio device 1 that includes a mobile phone 2 and a cradle 3 and outputs a control signal for controlling the amplification unit 310 of the tardle 3 from the mobile phone 2 to the cradle 3 side. I can do it. Furthermore, the acoustic device 1 is configured such that the electrical connection between the ground terminal 61d and the ground receiving terminal 41d is made earlier than the electrical connection between the control signal output terminal 61b and the control signal input terminal 41b. be able to. Accordingly, it is possible to suppress the occurrence of noise such as pop sound from the speaker when the mobile terminal device is placed on the cradle.

 [0054] When the mobile phone 2 is placed on the cradle 3, the middle and high frequencies are emitted from the speaker 250 on the cellular phone 2 side, and the low frequencies are emitted from the speaker 320 on the cradle 3 side. It can cover the whole range and achieve good balance! / Acoustic characteristics.

 [0055] In addition, by configuring the speaker 320 of the cradle 3 to emit a low frequency range, the speaker 320 can be disposed so as to face the bottom surface 50 of the stale dollar 3, and the speaker hole 51 is provided on the bottom surface 50. be able to. As a result, the degree of freedom in design of the cradle 3 is improved, and sound can be output from all directions by emitting sound from the flat bottom surface 50. In addition, the dust and drip resistance of the cradle 3 is improved.

[0056] The preferred embodiment of the present embodiment has been described above, but the present invention is not limited to the above-described embodiment, and can be implemented in various forms. For example, in this embodiment, the cradle is configured so that the electrical connection force between the ground terminal 61d and the ground receiving terminal 41d is made earlier than the electrical connection between the control signal output terminal 61b and the control signal input terminal 41b. Force that is configured so that the tip of the ground receiving terminal 41d on the 3 side protrudes the most. Not limited to this, so that the terminal surface of the ground terminal 61d on the mobile phone 2 side protrudes from the terminal surface of the control signal output terminal 61b. The ground receiving terminal 41d is more than the control signal input terminal 41b. It may be configured to project upward, and the ground terminal 6 Id and the ground receiving terminal 41 d may be connected first.

 In the present embodiment, the cradle-side terminal group 41 is a force configured to protrude when the mobile phone 2 is placed. Not limited to this, the cradle-side terminal group 41 is placed in the placement portion 31. It may be fixed. In this case, the height from the bottom surface 33 of the ground receiving terminal 41d is configured to be higher than the height from the bottom surface 33 of the control signal input terminal 41b. Thus, when the mobile phone 2 is placed so as to be inserted into the placement portion 31 of the cradle 3, the electrical connection force S between the ground terminal 61 d and the ground receiving terminal 4 Id, the control signal output terminal 6 lb And the electrical connection between the control signal input terminal 41b and the control signal input terminal 41b.

 [0058] Further, the control signal output terminal can be obtained by making the distance from the mounting surface 20 of the ground terminal 6 Id on the mobile phone 2 side shorter than the distance from the mounting surface 20 of the control signal output terminal 6 lb. Faster than electrical connection between 6 lb and control signal input terminal 41b. For example, only the ground terminal 61d can be arranged at a position close to the mounting surface 20, or the terminal group can be arranged obliquely so that the ground terminal 61d is arranged at a position close to the mounting surface 20. .

Claims

The scope of the claims  [1] A cradle including an amplifying unit that amplifies an input acoustic signal and a speaker that outputs an amplified acoustic signal output from the amplifying unit to the outside; An audio device including: an audio signal input to a unit; and a portable terminal device that outputs a control signal for controlling the amplification unit to the table,  The portable terminal device includes an acoustic signal output terminal that outputs the acoustic signal, a control signal output terminal that outputs the control signal, and a ground terminal.  The pedestal is electrically connected to the acoustic signal input terminal electrically connected to the acoustic signal output terminal, the control signal input terminal electrically connected to the control signal output terminal, and the ground terminal. A ground receiving terminal,  When the mobile terminal device is placed on the cradle, the electrical connection between the ground terminal and the ground receiving terminal is prior to the electrical connection between the control signal output terminal and the control signal input terminal. An acoustic device configured to be connected.  [2] The mounting table includes a concave mounting portion that receives a mounting surface of the mobile terminal device on a bottom surface,  The acoustic input terminal, the control signal input terminal, and the ground receiving terminal are respectively disposed at predetermined positions at the same height from the bottom surface of the mounting portion,  The acoustic device according to claim 1, wherein the tip of the ground receiving terminal protrudes from the tip of the control signal input terminal. [3] The mounting table includes a concave mounting portion that receives a mounting surface of the mobile terminal device on a bottom surface,  The acoustic input terminal, the control signal input terminal, and the ground receiving terminal are respectively disposed at predetermined positions at the same height from the bottom surface of the mounting portion,  The acoustic signal output terminal, the control signal output terminal, and the ground terminal are respectively disposed at predetermined positions at the same distance from the mounting surface on a surface continuous with the mounting surface, and The acoustic device according to claim 1, wherein a tip protrudes from a tip of the control signal output terminal. [4] The mounting table is a concave mounting unit that receives a mounting surface of the mobile terminal device on a bottom surface. With  The acoustic input terminal, the control signal input terminal, and the ground receiving terminal are each disposed on a side surface of the mounting portion,  2. The acoustic device according to claim 1, wherein a height of the ground receiving terminal from the bottom surface is higher than a height of the control signal input terminal from the bottom surface. [5] The mounting table includes a concave mounting portion that receives a mounting surface of the mobile terminal device on a bottom surface,  The acoustic input terminal, the control signal input terminal, and the ground receiving terminal are each disposed on a side surface of the mounting portion,  The acoustic signal output terminal, the control signal output terminal, and the ground terminal are respectively disposed on a surface that is continuous with the mounting surface.  The acoustic device according to claim 1 or 4, wherein a distance of the ground terminal from the mounting surface is shorter than a distance of the control signal output terminal from the mounting surface. [6] The acoustic device according to claim 1,  The mobile terminal device includes a charging terminal for a secondary battery,  The acoustic device includes a power supply terminal that is electrically connected to the charging terminal. [7] The acoustic device according to claim 1,  The mobile terminal device includes a control unit, a playback unit, and a speaker.  When the mobile terminal device is placed on the cradle, the playback unit outputs a low-frequency sound signal to the acoustic signal output terminal and outputs it as a sound wave from the speaker of the cradle. And a sound device that outputs a sound signal in the middle sound range outward from the speaker of the mobile terminal device. [8] A concave mounting portion that receives a mounting surface on the bottom surface of the mobile terminal device; An acoustic signal input terminal electrically connected to an acoustic signal output terminal of the mobile terminal device disposed at a predetermined position at the same height from the bottom surface of the placement unit; and a control signal output of the mobile terminal device A control signal input terminal electrically connected to the terminal, and a ground receiving terminal electrically connected to the ground terminal of the mobile terminal device, The tip of the ground receiving terminal is placed so as to protrude from the tip of the control signal input terminal. 9. The pedestal according to claim 8, wherein the tip of the ground receiving terminal protrudes from the tip of the acoustic signal input terminal. [10] A concave mounting portion that receives a mounting surface on the bottom surface of the mobile terminal device;  An acoustic signal input terminal that is electrically connected to an acoustic signal output terminal of the mobile terminal device that is respectively disposed on a side surface of the placement unit, and is electrically connected to a control signal output terminal of the mobile terminal device. A control signal input terminal and a ground receiving terminal electrically connected to the ground terminal of the mobile terminal device,  A height of the ground receiving terminal from the bottom surface is higher than a height of the control signal input terminal from the bottom surface. 11. The pedestal according to claim 10, wherein a height of the ground receiving terminal from the bottom surface is higher than a height of the acoustic signal input terminal from the bottom surface. [12] An acoustic signal output terminal that outputs the acoustic signal, a control signal output terminal that outputs the control signal, and a ground terminal,  The acoustic signal output terminal, the control signal output terminal, and the ground terminal are respectively disposed at predetermined positions at the same distance from the mounting surface on a surface continuous with the mounting surface mounted on the mounting table. And a portable terminal device in which a tip of the ground terminal protrudes from a tip of the control signal output terminal. [13] An acoustic signal output terminal that outputs the acoustic signal, a control signal output terminal that outputs the control signal, and a ground terminal,  The acoustic signal output terminal, the control signal output terminal, and the ground terminal are arranged on a surface that is continuous with a placement surface placed on a pedestal,  The distance from the mounting surface of the ground terminal is shorter than the distance from the mounting surface of the control signal output terminal.