JP4566924B2 - Table for portable electronic device, audio device, and control method - Google Patents

Description

  The present invention relates to a table for a portable electronic device such as a mobile phone, an acoustic device including the table, and a method for controlling the table.

  An audio output circuit such as an audio circuit or a speaker is provided on a charging stand for charging a portable electronic device such as a mobile phone, and an acoustic signal generated in the portable electronic device connected to the charging stand is converted into sound by the speaker of the charging stand. A technique of converting and outputting is known (Patent Document 1). The power supply for the audio circuit is shared with the power supply for charging, and the audio circuit is supplied with power by connecting the AC adapter for charging to an external power supply.

In addition, a technique is known in which a switch that is pressed when the mobile phone is placed is provided on the charging stand, and the power supply circuit that reaches the output terminal portion of the charging stand is turned on only when the mobile phone is placed. (Patent Document 2).
JP 2003-079061 A JP 2003-289362 A

  However, the technique disclosed in Patent Document 1 causes various problems because power is supplied to the audio circuit even when the portable electronic device is not placed on the charging stand. For example, a noise current generated by the influence of external radio waves or the like may be amplified by an amplifier and output as a harsh sound from a speaker. Since power is supplied even when the audio circuit is not used, power is wasted. On the other hand, it is troublesome to connect or disconnect the charging base to or from the external power source every time the portable electronic device is placed on the charging base or removed from the charging base. In general, the charging base remains connected to the external power source. There are many cases.

  The technology of Patent Document 2 is a technology related to a power feeding structure to an output terminal connected to an input terminal on the mobile phone side, and a configuration in which a speaker is installed on a charging stand and sound is output from the speaker is completely disclosed and suggested. No attention has been paid to the problem of noise output from a speaker installed on the charging stand.

  An object of the present invention is to provide a table for a portable electronic device capable of appropriately supplying power to an acoustic output circuit in accordance with the mounting state of the portable electronic device, an acoustic device including the table, and control of the table It is to provide a method.

The table for the portable electronic device of the present invention is provided with a casing, a mounting portion provided on the casing, on which the portable electronic device can be mounted, and an external power source to which power from the external power source is input. A power input unit, an acoustic input unit to which an acoustic signal output from the portable electronic device mounted on the mounting unit is input, and an electric power input from the power input unit, An acoustic output unit that outputs the acoustic signal input from the input unit; a speaker that converts the acoustic signal output from the acoustic output unit into sound; and the power input unit Connected to the sound output means, and when the portable electronic device is placed on the placement portion, the power input portion and the sound output means are energized by being pressed toward the inside of the housing. The portable electronic device is placed on the placement unit. It said to be detached from the state pressing is released and a mechanical switch unit to cut off the energization.

Preferably, the sound output means is an amplification means for amplifying the sound signal input by the sound input unit.

Preferably, the portable electronic device includes a holding unit that holds the portable electronic device in a state where the power input unit and the sound output unit are energized when the portable electronic device is placed on the placement unit.

Preferably, the mechanical switch portion is provided so as to protrude from a bottom portion of the concave portion formed in the mounting portion, and corresponds to the concave portion when the portable electronic device is mounted on the mounting portion. And pressed by a protrusion disposed on the portable electronic device.

Preferably, the projection is provided outside the casing, and connected to the power input unit in parallel with the acoustic output unit via the mechanical switch unit, and input from the power input unit. wherein Ru comprising a power supply terminal for supplying power from an external power source to the portable electronic device.

The acoustic device of the present invention includes a portable electronic device capable of outputting an acoustic signal, a casing, a mounting portion provided in the casing, on which the portable electronic device can be mounted, and an external power source connected to the external power source. The power input unit to which the power is input, the acoustic input unit to which the acoustic signal output from the portable electronic device mounted on the mounting unit is input, and the power input by the power input unit operate. , sound output means for outputting the sound signal input by the sound input unit, a speaker for converting the acoustic signals output from the sound output means to the acoustic, with provided the mounting section, wherein the power input Connected to the sound output means, and when the portable electronic device is placed on the placement portion, the power input portion and the sound output means are energized by being pressed toward the inside of the housing. The portable electronic device is Having a stand comprising a mechanical switch unit to cut off the energization is released the pressing to be removed from the mounted state to.

  ADVANTAGE OF THE INVENTION According to this invention, the electric power feeding to an acoustic output circuit can be performed appropriately according to the mounting state of a portable electronic device.

(First embodiment)
FIG. 1 is a plan view partially including a perspective view showing a mobile phone unit 1 including a mobile phone 2 and a cradle device 3 according to the first embodiment of the present invention, and FIG. FIG. 1B shows the cellular phone 2 in the closed state, and FIG. 1C shows the cellular phone 2 in the opened state. The mobile phone 2 is an example of a portable electronic device, the cradle device 3 is an example of a table, and the mobile phone unit 1 is an example of an acoustic device.

  FIG. 2 is a plan view including a perspective view partially showing a state in which the mobile phone 2 is placed on the cradle device 3. FIG. 2 (a) shows a case where the mobile phone 2 is closed. b) shows a case where the cellular phone 2 is opened.

  3 is a side view including a perspective view partially showing a state where the mobile phone 2 is placed on the cradle device 3. FIG. 3A shows a case where the mobile phone 2 is in a closed state. b) shows a case where the cellular phone 2 is opened.

  The mobile phone 2 is configured to include a receiving case 5 and a transmitting case 6, and the receiving case 5 and the transmitting case 6 are connected to each other by connecting portions 7. 2 can be opened and closed with the connecting portion 7 as the center of rotation. The connecting portion 7 is configured by fitting a concave portion formed in the receiver housing 5 to a convex portion 6 c that protrudes toward the receiver housing 5 formed in the transmitter housing 6. The reception case 5 and the transmission case 6 are each formed in a substantially thin rectangular parallelepiped shape, are overlapped with each other in the closed state, and the outlines of the reception case 5 and the transmission case 6 substantially coincide with each other when viewed from the other case side. It is like that.

  The receiving case 5 is formed in a substantially thin rectangular parallelepiped shape by resin, for example. The receiving case 5 is provided with a display unit 9 for displaying an image on a facing surface facing the transmitting case 6 in the closed state. The display unit 9 is configured by, for example, a liquid crystal display. In addition, the receiving case 5 is provided with a speaker 39 for calling (see FIG. 5), and the sound outlet 10 of the speaker is provided on the opposite surface.

  The transmitter case 6 is formed in a substantially thin rectangular parallelepiped shape, for example, with resin. The transmission case 6 includes an operation unit 12 that receives user operations, a main antenna 13 and a sub-antenna 14 that transmit and receive radio waves, a speaker 15 that outputs a notification sound, a call microphone 35 (see FIG. 5), A sound collecting hole 16 of the microphone 35 and a sound emitting hole 17 of the speaker 15 are provided.

  The cradle device 3 includes a housing 18, a charger 52 (FIG. 1A) for supplying power to the cradle device 3, and a charging terminal for electrically connecting the cradle device 3 and the mobile phone 2. 20, 21 and an acoustic signal terminal 22, a speaker 23 that outputs sound based on an acoustic signal input from the mobile phone 2, a mechanical switch 41 for detecting the placement of the mobile phone 2, and the mobile phone 2 in a cradle. And an engaging portion 42 for holding the device 3.

  The charger 52 is an example of a power input unit, the charging terminals 20 and 21 are examples of a power supply terminal, the acoustic signal terminal 22 is an example of an acoustic input unit, the mechanical switch 41 is a power feeding suppression unit, and a detection unit. The engaging portion 42 is an example of a holding unit.

  The housing 18 includes, for example, a lower cover 18a that is placed on a desk or the like, and an upper cover 18b that covers the lower cover 18a. The lower cover 18a and the upper cover 18b are made of resin, for example. The upper cover 18b is placed on the lower cover 18a so as to be inclined with respect to the surface on which the housing 18 is placed, and the housing 18 as a whole is placed on the surface (desk surface or the like) on which the housing 18 is placed. It is formed in the trapezoid shape which has the inclined surface 18c which inclines.

  On the upper surface of the housing 18, a recess (mounting portion) 25 for mounting the mobile phone 2 is formed. The recess 25 is provided on the lower side of the inclined surface 18c. The concave portion 25 is formed in a shape to which the transmitter case 6 of the mobile phone 2 is fitted, and a bottom portion with which the rear surface 6a of the transmitter case 6 abuts is a surface (desk surface) on which the cradle device 3 is placed. Etc.). The cellular phone 2 is configured so that it can be placed on the cradle device 3 when the transmitter case 6 is fitted and inserted into the recess 25 with the connecting portion 7 side facing the upper side of the inclined surface 18c.

  As shown in FIGS. 3A and 3B, the depth of the recess 25 is substantially equal to or less than the thickness of the transmitter case 6. Therefore, even if the cellular phone 2 is opened and closed while the cellular phone 2 is placed in the recess 25, the periphery of the recess 25 of the inclined surface 18c does not contact the receiving housing 5, and the opening and closing of the cellular phone 2 is obstructed. I can't.

  The charger 52 is constituted by an AC adapter, and is connected to an electric circuit inside the housing 18 by a cord 19. The charger 52 includes a power supply terminal 52a. When the power supply terminal 52a is inserted into a power supply receptacle for supplying commercial frequency power, power from an external power supply is input. The charger 52 converts an alternating current supplied from an external power source into a direct current having an appropriate voltage, and supplies power to the circuit board inside the housing 18 via the cord 19.

  A connector 53 is provided at the end of the cord 19 on the housing 18 side. The connector 53 can be connected to or removed from the connector (not shown) provided on the housing 18, and can be connected to or removed from the connector (not shown) provided on the mobile phone 2. In other words, the mobile phone 2 can be directly charged by the charger 52 by connecting the connector 53 to the mobile phone 2.

  The charging terminals 20, 21 are provided so as to protrude from the bottom of the recess 25, and when the mobile phone 2 is fitted and inserted into the recess 25, the charging terminals 37 ( (See FIG. 5).

  The acoustic signal terminal 22 is provided so as to protrude from the bottom of the recess 25. Further, the charging terminals 20 and 21 are provided adjacent to each other. When the mobile phone 2 is fitted and inserted into the recess 25, the acoustic signal terminal 22 contacts and is connected to an acoustic signal terminal (output unit) 36 (see FIG. 5) provided in the transmitter case 6 of the mobile phone 2. The

  The speaker 23 is provided above the inclined surface 18c with respect to the recess 25. The speaker 23 is disposed so that the sound emitting surface faces the back surface of the inclined surface 18c (facing upward), and the inclined surface 18c is configured to emit sound for emitting sound output from the speaker 23. A sound hole 24 is provided.

  FIG. 4 is a diagram for explaining the mechanical switch 41 and the engaging portion 42. FIG. 4 (a) shows the back surface 6a side of the connection portion 7 side end portion of the transmitting housing 6 (with the receiving housing 5 in the closed state). FIG. 4B is a perspective view of the opposite side of the opposite surface, the side placed on the placement surface of the recess 25 of the cradle device 3, and FIG. 4B is a cross-sectional view in the direction of arrows IVb-IVb in FIG. FIG. 4C is a cross-sectional view taken along line IVc-IVc in FIG.

  As shown in FIG. 4 (a), a projection 6b is formed on the back surface 6a of the transmitting case 6 so as to protrude to the back side (the side opposite to the receiving case 5). For example, a camera module 61 and an infrared communication unit 62 are provided inside the protrusion 6b, and an opening window for the camera module 61 and an opening window for the infrared communication unit 62 are formed on the surface of the protrusion 6b. ing. In the transmitting case 6, on the side opposite to the protruding portion 6 b (the receiving case 5 side), a convex portion 6 c (see FIG. 1 etc.) constituting the connecting portion 7 protrudes toward the receiving case 5 side. The protrusion 6b is, for example, the same size as the convex portion 6c in the rotation axial direction (left and right direction in FIG. 1), and protrudes in the direction orthogonal to the rotation axis (up and down direction in FIG. 1). It is formed slightly larger than the part 6c.

  Further, as shown in FIG. 4A, an engagement hole 6 h for engaging with the engagement portion 42 of the cradle device 3 is formed on the end surface of the transmission housing 6 on the connection portion 7 side. . The engagement holes 6h are formed in, for example, a rectangular shape, and are provided on both sides of the protrusion 6b.

  As shown in FIGS. 1 (a) and 4 (b), the bottom of the recess 25 of the cradle device 3 is formed with a protrusion recess 25a into which the protrusion 6b of the transmitter case 6 is fitted. . The depth of the protruding portion recess 25a is set to be substantially equal to the protruding amount of the protruding portion 6b, and the transmitting case 6 is inserted into the protruding portion recess 25a, whereby the protruding portion 6b is inserted. Is supported by the bottom of the concave portion 25a for the projecting portion, and a relatively wide range other than the projecting portion 6b of the back surface 6a of the transmission case 6 is supported by the bottom of the concave portion 25. A mechanical switch 41 is provided in the projection recess 25a.

  As shown in FIG. 4B, the mechanical switch 41 includes a key top 43, a movable contact 44 pressed by the key top 43, a first fixed contact 45 that contacts the movable contact 44, and the movable contact 44. And a second fixed contact 46 which can be contacted or separated. The key top 43 is an example of a pressed part, and the movable contact 44 is an example of a blocking operation part.

  The key top 43 is formed of, for example, resin, and protrudes from an opening formed at the bottom of the protrusion recess 25a, and a position retracted from the position to the inside of the casing of the cradle device 3 (downward on the paper surface). You can move forward and backward. The amount of protrusion of the key top 43 is regulated by the flange 43a that engages with the bottom inner surface of the protrusion recess 25a. For example, the key top 43 is set to a size that does not protrude from the protrusion recess 25a. The key top 43 may protrude from the protrusion recess 25a.

  The movable contact 44 is formed as a dome-shaped disc spring by a conductive member such as metal, and supports the key top 43 with a convex surface. The first fixed contact 45 is provided on a circuit board 47 provided in the housing 18 of the cradle device 3 and supports the edge of the movable contact 44. The second fixed contact 46 is provided on the circuit board 47 and is disposed at the center of the movable contact 44.

  When the transmitter case 6 of the mobile phone 2 is placed in the recess 25 of the cradle device 3 and the protrusion 6b of the transmitter case 6 is fitted into the protrusion recess 25a of the recess 25, the protrusion 6b becomes the key top. 43, and the key top 43 is pressed by the weight of the mobile phone 2. The central portion of the movable contact 44 is pressed by the key top 43, and the movable contact 44 is elastically deformed so that the central portion approaches the circuit board 47 side, and abuts against the second fixed contact 46 while generating a click feeling. As a result, the first fixed contact 45 and the second fixed contact 46 are electrically connected via the movable contact 44.

  On the other hand, when the transmitter case 6 is removed from the recess 25, the movable contact 44 returns to a position away from the second fixed contact 46 by its own restoring force. At this time, the key top 43 is also urged by the movable contact 44 to return to a position where it protrudes from the bottom of the protrusion recess 25a. Then, the first fixed contact 45 and the second fixed contact 46 are electrically disconnected.

  As shown in FIGS. 1 (a) and 4 (b), the engaging portion 42 is a wall portion 25w on the upper side of the inclined surface 18c of the recess 25 of the cradle device 3 (upper side of the paper surface in FIG. 1 (a)). Is provided. As shown in FIG. 4C, the engaging portion 42 advances and retreats between a position protruding from the opening opening in the wall portion 25w and a position retracted from the position to the inside of the housing of the cradle device 3. A possible engaging member 48 and a spring 49 for urging the engaging member 48 toward the protruding position are provided.

  The engaging member 48 is formed of, for example, a resin, and has a rectangular shape when viewed from the forward / backward direction (viewed from the left and right direction in FIG. 4C), and a protruding portion when viewed from a direction orthogonal to the forward / backward direction. Is formed. The spring 49 is formed of, for example, a metal coil spring, and is supported at an appropriate position of the casing 18 of the cradle device 3 to urge the engaging member 48. The spring 49 may be other urging means such as a leaf spring formed of metal or resin.

  When the transmitting case 6 of the mobile phone 2 is inserted into the recess 25 of the cradle device 3, the engaging member 48 is pushed into the inside of the cradle device 3 by the transmitting case 6 in the middle. When the transmitter case 6 is further inserted into the recess 25 and the protrusion 6b of the transmitter case 6 moves to a position where the mechanical switch 41 is pressed and turned on, the engagement hole 6h of the transmitter case 6 is It moves to the position of the engaging part 42, and the engaging member 48 is inserted into the engaging hole 6h by the biasing force of the spring 49. Thereby, the engaging member 48 and the engaging hole 6h are engaged, and the transmitting housing 6 is held by the cradle device 3.

  On the other hand, when the transmitter case 6 is lifted from the recess 25 of the cradle device 3, the engaging member 48 resists the biasing force of the spring 49 toward the inside of the cradle device 3 by the transmitter case 6. And the engagement between the engagement member 48 and the engagement hole 6h is released.

  FIG. 5 is a block diagram showing a schematic configuration of a signal processing system of the mobile phone unit 1.

  The mobile phone 2 includes a control unit 31 that controls operations of various electronic elements, a communication processing unit 32 for performing wireless communication, an acoustic processing unit 33 that performs processing related to acoustic output, and a charging circuit 34. Yes. In addition to the above, the mobile phone 2 includes various means such as an image processing unit that converts the video data from the control unit 31 into a video signal and outputs the video signal to the display unit 9.

  The control unit 31 is configured by an IC including, for example, a CPU, ROM, RAM, and the like. The CPU executes a program recorded in the ROM, and based on a signal from the operation unit 12, the communication processing unit 32, acoustic It controls the operation of the processing unit 33 and the like.

  The communication processing unit 32 includes a high frequency circuit, and performs wireless communication using radio waves. Specifically, the communication processing unit 32 modulates various data such as acoustic data and image data processed by the control unit 31 and transmits the data via the main antenna 13. In addition, the communication processing unit 32 demodulates a signal received via the main antenna 13 and the sub antenna 14 and outputs the demodulated signal to the control unit 31 and the like.

  The acoustic processing unit 33 outputs the acoustic signal from the microphone 35 to the control unit 31. The acoustic processing unit 33 mixes and amplifies an acoustic signal transmitted from another mobile phone via the communication processing unit 32 and the control unit 31, an acoustic signal based on music data stored in the control unit external storage device, and the like. For example, the output is made to the speaker 39 for calling, the speaker 15 used for notification, and the sound signal terminal 36.

  The charging circuit 34 converts the electric power supplied to the charging terminal 37 into electric power having an appropriate voltage and supplies the electric power to a battery 38 as a power source of the mobile phone 2. Further, charging (power supply) to the battery 38 is started or the charging is interrupted according to the charging state of the battery 38 or the like.

  The cradle device 3 includes an amplifier 51. The amplifier 51 is an example of sound output means and amplification means. The amplifier 51 amplifies the acoustic signal input from the mobile phone 2 via the acoustic signal terminal 22 and outputs the amplified signal to the speaker 23. The speaker 23 converts the acoustic signal output from the amplifier 51 into sound and outputs the sound.

  The DC power input to the charger 52 and supplied to the circuit inside the casing 18 of the cradle device 3 via the cord 19 is output to the charging terminals 20 and 21 and also to the amplifier 51. The amplifier 51 is supplied with power from the charger 52 and operates.

  FIG. 6 is a circuit diagram around the amplifier 51. In FIG. 6, the internal configuration of the amplifier 51 is shown in a conceptual block diagram. Details of bypass capacitors and the like are omitted.

  The amplifier 51 is configured by, for example, a so-called differential output type amplifier circuit, and amplifies an electric signal input to the input terminal 51b by a pair of transistors 55 (shown as one block in FIG. 6). Output from the first output terminal 51c and the second output terminal 51f. The input terminal 51 b is connected to the acoustic signal terminal 22. The first output terminal 51 c and the second output terminal 51 f are connected to the speaker 23.

  The amplifier 51 applies the voltage applied to the power supply terminal 51e to the transistor 55, and amplifies the electrical signal input to the input terminal 51b. The transistor 55 amplifies the acoustic signal with an amplification factor according to the voltage applied from the power supply terminal 51e. In other words, the amplification operation of the transistor 55 is suppressed according to the suppression of power supply. The power supply terminal 51 e is connected to the charger 52. A mechanical switch 41 is provided between the power supply terminal 51 e and the charger 52. The reference potential is obtained by the GND terminal 51d.

  Application of voltage from the power supply terminal 51e to the transistor 55 is controlled by application of voltage from the control terminal 51a. For example, a switching element 56 is provided between the power supply terminal 51e and the transistor 55. The switching element 56 is configured such that when a voltage higher than a predetermined potential is applied to the control terminal 51a, the power supply terminal 51e and the transistor 55 are provided. And the power supply terminal 51e and the transistor 55 are brought into a non-conduction state when a voltage higher than a predetermined potential is not applied to the control terminal 51a. Therefore, the transistor 55 is switched between an operating state and a non-operating state by applying a voltage to the control terminal 51a. The control terminal 51a is connected to the charger 52. In the present embodiment, the control terminal 51a and the switching element 56 may be omitted.

  The operation of the portable electronic unit 1 will be described.

  When the transmitter case 6 of the mobile phone 2 is placed in the recess 25 of the cradle device 3 in a state where the charger 52 is connected to an external power source, the protruding portion 6b of the transmitter case 6 is connected to the cradle device 3. When the mechanical switch 41 is pressed, the mechanical switch 41 is turned on. As a result, power is supplied from the charger 52 to the charging terminal 20 to charge the mobile phone 2, and power is supplied from the charger 52 to the power supply terminal 51 e and the control terminal 51 a of the amplifier 51. It becomes an operation state. When an acoustic signal is input from the mobile phone 2 to the input terminal 51b of the amplifier 51 via the acoustic signal terminal 22, the acoustic signal amplified by the transistor 55 is transmitted via the first output terminal 51c and the second output terminal 51f. Are output to the speaker 23, converted into sound by the speaker 23, and emitted.

  On the other hand, when the mobile phone 2 is removed from the recess 25, the mechanical switch 41 is turned off. As a result, the supply of power from the charger 52 to the charging terminal 20 is cut off, and the supply of power to the amplifier 51 is also cut off, so that the amplifier 51 becomes inactive.

  According to the above embodiment, the mechanical switch 41 that suppresses the power supply from the charger 52 to the amplifier 51 when the cellular phone 2 is not placed in the recess 25 of the cradle device 3 is provided. Various adverse effects caused by supplying power to the amplifier 51 despite the fact that the cellular phone 2 is not placed are alleviated. For example, even if a noise current is generated by radio waves or the like, the noise current is not amplified by the amplifier 51 and emitted from the speaker 23.

  Since the mechanical switch 41 detects the placement of the mobile phone 2 and the power supply to the amplifier 51 is released when the placement of the mobile phone 2 is detected, the automatic switch is automatically applied according to the placement of the mobile phone 2. Thus, the power supply to the amplifier 51 is controlled conveniently.

  The key top 43 of the mechanical switch 41 protruding from the concave portion 25 of the cradle device 3 is pressed by the placement of the mobile phone 2, and the movable contact 44 abuts on the second fixed contact 46, thereby placing the mobile phone 2. Since the detection and release of the stop of the power supply to the amplifier 51 are performed, the configuration is simple compared to the case where the placement of the mobile phone 2 is detected by an optical sensor or the like.

  When the mobile phone 2 is placed in the recess 25 of the cradle device 3, the engaging portion 42 holds the mechanical switch 41 in the depressed state 25, so that the mobile phone 2 is securely placed. At the same time, the supply of power to the amplifier 51 is stopped.

  The mechanical switch 41 is disposed in a protrusion recess 25 a formed in the recess 25 of the cradle device 3, and is pressed by the protrusion 6 b of the transmitter case 6 when the mobile phone 2 is placed in the recess 25. Since the mobile phone 2 is not placed, the possibility of malfunction caused by being pressed when the mobile phone 2 is not placed is reduced.

  The mechanical switch 41 stops supply of power to the amplifier 51 and also stops supply of power to the charging terminal 20 when the mobile phone 2 is not placed. For this reason, for example, safety is improved and power consumption is also reduced.

(Second Embodiment)
FIG. 7 is a circuit diagram around an amplifier according to the second embodiment of the present invention. In addition, about the structure similar to 1st Embodiment, the code | symbol same as 1st Embodiment or the code | symbol of 1st Embodiment is attached | subjected and shown, and illustration and description are abbreviate | omitted.

  The second embodiment is different from the first embodiment in that the operation command terminal 123 is provided in the cradle device, and the operation command terminal 123 and the control terminal 51a are connected. The operation command terminal 123 is an example of an operation command signal input unit. Further, the mechanical switch 41 is omitted. However, the mechanical switch 41 may be provided also in the second embodiment.

  In the second embodiment, power supply to the transistor 55 is allowed when a voltage of a predetermined potential or higher is applied to the operation command terminal 123, and power supply to the transistor 55 is suppressed when voltage is not applied. Is done.

  The operation command terminal 123 is, for example, arranged around the positions where the charging terminals 20 and 21 and the acoustic signal terminal 22 shown in FIG. 1 are arranged, and the mobile phone 2 ′ is carried by being placed in the recess 25 of the cradle device 3 ′. It is connected to an operation command terminal 136 provided on the telephone 2 '.

  The control unit 31 ′ of the mobile phone 2 ′ appropriately outputs an operation command signal that is an electric signal having a predetermined potential or higher to the operation command terminal 136.

  For example, the control unit 31 ′ always outputs an operation command signal to the operation command terminal 136. In this case, the mobile phone 2 ′ is placed in the recess 25 of the cradle device 3, that is, the operation command terminal 136 of the mobile phone 2 ′ is connected to the operation command terminal 123 of the cradle device 3 ′. The command signal is input to the operation command terminal 123, and power supply to the transistor 55 is allowed. Further, by removing the cellular phone 2 ′ from the recess 25, power supply to the transistor 55 is suppressed.

  For example, the control unit 31 ′ outputs an operation command signal to the operation command terminal 136 when outputting an acoustic signal from the acoustic processing unit 33. Specifically, for example, the control unit 31 ′ manages activation and processing of various functions, and while a specific function for outputting sound such as a music reproduction function and a movie reproduction function is activated, or An operation command signal is output during a specific process in which sound is output, such as outputting a notification sound from a MIDI sound source in response to an incoming call or performing communication for a call. The function and processing for outputting the operation command signal may be selected by the user or may be selectable by the user.

  In the second embodiment, the transistor 55 of the amplifier 51 functions as an acoustic output unit that controls power feeding, and the switching element 56 functions as a power feeding suppression unit. In addition, the switching element 56 detects whether the mobile phone 2 ′ is placed or not based on the presence / absence of an operation command signal, and it can be said that the transistor 55 and the charger 52 are in a conductive state or a non-conductive state. The element 56 functions as a detecting unit and a blocking unit.

  According to the second embodiment described above, when the mobile phone 2 ′ is not placed on the cradle device 3 ′, the operation command signal is not input to the cradle device 3 ′, and the supply of power to the transistor 55 is stopped. Therefore, as in the first embodiment, the adverse effect of supplying power to the transistor 55 is eliminated although the mobile phone 2 'is not placed.

  When the operation command signal is output when the acoustic signal is output from the acoustic processing unit 33, the mobile phone 2 'is placed on the cradle device 3' and the sound is transmitted from the speaker 23. Since power is supplied to the transistor 55 only when output is necessary, the power supplied to the transistor 55 can be minimized.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The mobile electronic device is not limited to a mobile phone as long as it can output an acoustic signal. For example, a notebook computer, a PDA, or a game machine may be used. The cradle only needs to include a speaker that converts an acoustic signal output from the portable electronic device into sound, and is not limited to a charging stand. For example, a speaker-dedicated device that does not have a charging function may be used.

  The sound input unit is not limited to a terminal connected to the mobile phone as long as an acoustic signal is input from the mobile electronic device mounted on the mounting unit. For example, an acoustic signal from a portable electronic device may be input by infrared communication.

  The external power supply may be any power supply that supplies power to the sound output means of the pedestal, and is not limited to one that supplies AC power at a commercial frequency such as a power plant. For example, a battery that can be mounted on a pedestal may be used, or an electric power generated by an internal combustion engine of an automobile may be supplied.

  The acoustic output means may be any device that outputs an acoustic signal input from the portable electronic device via the acoustic input unit and performs the output operation using the power input in the power input unit. The amplifier is not limited to an amplifier combined with a transistor. For example, an equalizer or a filter that changes the frequency characteristics of the acoustic signal may be used, or a mixer that mixes a plurality of acoustic signals may be used. The acoustic signal from the acoustic input unit may or may not be changed. Note that whether or not the sound output means is operating with the supplied power is, for example, whether or not the current flow in the sound output means is changed when power is not supplied. It can be determined by whether or not the acoustic signal output from the acoustic output means has changed (including the case where no acoustic signal is output from the acoustic output means when power is not supplied).

  The power feeding suppression means can reduce the power supplied to the sound output means when the portable electronic device is not placed, with respect to the power supplied to the sound output means when the portable electronic device is placed. It may be anything, and is not limited to one that completely stops the supply of power. If the supplied power can be suppressed to some extent, the waste of power, the volume of noise, and the like are reduced, and the effects of the present invention are achieved.

  The detection means for detecting the placement of the portable electronic device is not limited to a contact type switch such as a mechanical switch. For example, a non-contact type sensor such as a light detection sensor or a magnetic sensor may be used. The blocking means is not limited to one that mechanically opens and closes the circuit, such as a mechanical switch. For example, a field effect transistor may be used.

1 is a front view including a perspective view partially illustrating a mobile phone and a cradle device of a mobile electronic unit according to a first embodiment of the present invention. FIG. 2 is a front view including a perspective view of a part of the portable electronic unit shown in FIG. 1 in a state where the mobile phone is placed on a cradle device. The side view which includes a perspective view in a part which shows the portable electronic unit of Drawing 1 in the state where a cellular phone was laid in a cradle device. The figure explaining the mechanical switch and engagement part of the cradle apparatus of FIG. The block diagram which shows the structure of the signal processing system of the portable electronic unit of FIG. The circuit diagram around the amplifier of the cradle apparatus of FIG. The circuit diagram around the amplifier of the cradle apparatus concerning the 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cell-phone unit (acoustic device), 2 ... Cell-phone (mobile electronic device), 3 ... Cradle device (table), 22 ... Acoustic signal terminal (acoustic input part), 23 ... Speaker, 25 ... Recessed part (mounting) Part), 51... Amplifier (acoustic output means), 41... Mechanical switch (power feeding suppression means), 52.

Claims (6)

A housing,
A mounting portion provided in the housing and capable of mounting a portable electronic device;
A power input unit that is connected to an external power supply and receives power from the external power supply;
An acoustic input unit to which an acoustic signal output from the portable electronic device mounted on the mounting unit is input;
Sound output means that operates with the power input in the power input unit and outputs the acoustic signal input in the sound input unit;
A speaker for converting the sound signal output from the sound output means into sound;
It is provided between the power input unit and the sound output means, and is provided in the mounting unit, and when the portable electronic device is mounted on the mounting unit, it is pressed toward the inside of the housing. A mechanical switch unit that energizes the power input unit and the sound output unit, and releases the pressure when the portable electronic device is removed from a state of being mounted on the mounting unit, and interrupts the energization; A stand for a portable electronic device, comprising: The sound output unit, stand in a portable electronic device according to claim 1, characterized in that the amplifying means for amplifying the sound signal input by the sound input unit. The portable electronic device has holding means for holding the portable electronic device in a state where the power input unit and the sound output unit are energized when the portable electronic device is placed on the placement unit. Item 3. A stand for a portable electronic device according to claim 1 or 2 . The mechanical switch portion is provided so as to protrude from a bottom portion of a concave portion formed in the mounting portion, and the portable electronic device corresponds to the concave portion when the portable electronic device is placed on the mounting portion. The table for portable electronic equipment according to any one of claims 1 to 3, wherein the stage is pressed by a protrusion provided on the equipment. Protruding outside the housing, connected to the power input unit in parallel with the acoustic output means via the mechanical switch unit, and from the external power source input at the power input unit stand for a portable electronic device according to any one of claims 1 to 4 to the power, characterized in that Ru comprising a power supply terminal for supplying to said portable electronic device. A portable electronic device capable of outputting an acoustic signal;
A case, a placement unit provided in the case, on which a portable electronic device can be placed, a power input unit that is connected to an external power source and receives power from the external power source, and placed on the placement unit In addition, an acoustic input unit to which an acoustic signal output from the portable electronic device is input, an acoustic output that operates by power input from the power input unit and outputs the acoustic signal input from the acoustic input unit Means, a speaker for converting the sound signal output from the sound output means into sound , provided in the mounting portion, and connected between the power input portion and the sound output means, wherein the portable electronic device is When placed on the mounting section, the power input section and the sound output means are energized by being pressed toward the inside of the housing, and the portable electronic device is placed on the mounting section. Once removed, the pressure is released Acoustic apparatus characterized by having placed the base comprises a mechanical switch unit to cut off the serial current.

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