JP2011062069A - Battery type mobile phone charger with voice input/output terminal, and secondary battery type mobile phone charger with voice input/output terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy-to-use mobile phone charger that allows a voice signal to be input/output for e.g., handsfree phone call even during charging of a battery in a mobile phone. <P>SOLUTION: The battery type mobile phone charger is provided with a first connector for charging a battery in the mobile phone, and a second connector for voice signal input/output, which is attached independently of the first connector. A noise canceling switch circuit is provided to reduce the influence of noise generated when voice signal output and charging are performed simultaneously. To reduce an increasing power supply ripple, a constant voltage diode is added to the power supply system. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a battery-type mobile phone charger, and more particularly to a battery-type mobile phone charger with a voice input / output terminal having good voice quality.

  In a widely used mobile phone, in order to be able to talk without having to hold it directly by hand, it is possible to send audio to an external earphone or speaker, or to input audio from an external microphone. Many have output terminals. By using hands-free, you can talk while doing other tasks. As the demand for miniaturization of cellular phones has increased, the voice terminals are rarely provided alone, and are incorporated into, for example, a multi-pin charging connector (also called a jack).

As is well known, a mobile phone is charged by fitting the mobile phone into a folder (also called a stand) and supplying DC power to the folder. For example, in Patent Document 1, as shown in FIG. 3 of the document, DC power from an AC adapter is supplied via a charging terminal 19 provided in the vicinity of the exterior of the mobile phone. In this case, the AC adapter and the folder are connected by a multi-pin connector.
It is also widely known that a mobile phone has a multi-pin connector so that the multi-pin connector on the AC adapter side can be directly connected to allow charging without a folder when going out. The above-mentioned audio terminal is often taken into this connector. For example, Non-Patent Document 1 discloses an earphone microphone that is used by being connected to the connector for both charging and voice, and a connector thereof.

JP 2008-182576 A

HP of Tama Electronics Co., Ltd. [Search on July 24, 2009], <http://www.tamadenco.co.jp/goods-main/t-680.html>

  Conventionally, when the battery is charged using the multi-pin connector described above, since the voice terminal incorporated in the battery cannot be used, for example, a hands-free call can be made. could not. In addition, when using the voice terminal, the battery cannot be charged, and the battery runs out during a hands-free call.

Needless to say, the connector used for charging may have an audio signal input / output terminal. However, the charging connector with the audio jack has a problem that the usability when the audio terminal is not used is deteriorated.
In view of the above-described problems, an object of the present invention is to provide a battery-powered mobile phone charger with a voice input / output terminal that is easy to use and has good voice quality.

  In order to achieve the above object, the present invention provides a battery-powered mobile phone charger with a voice input / output terminal for charging a rechargeable battery built in a mobile phone device using a battery as a power source and for inputting or outputting a voice signal. A charging circuit for charging a rechargeable battery built in the mobile phone device using a power source from the battery, and an output power of the charging circuit is supplied, and the output power is supplied to the connected mobile phone device A first connector that outputs the audio signal supplied from the mobile phone device or the audio signal supplied to the mobile phone device even when the mobile phone device is connected to the first connector. And a second connector provided separately from the first connector.

  Further, the present invention is characterized in that the battery-powered mobile phone charger with voice input / output terminals includes a noise reduction circuit for reducing noise included in a voice signal supplied from the mobile phone device.

  Further, the present invention is characterized in that the battery-powered mobile phone charger with voice input / output terminals has a ripple removal circuit for reducing ripples included in the output of the charging circuit.

  The present invention also provides a battery-powered mobile phone charger with a voice input / output terminal for charging a rechargeable battery built in a mobile phone device using a secondary battery as a power source and for inputting or outputting a voice signal. A charging circuit for charging a rechargeable battery built in the mobile phone device using a power source from a secondary battery; a charging control circuit for charging the secondary battery; and the mobile phone device for the mobile phone device A first connector for supplying output power for charging a rechargeable battery built in the battery, and an input for outputting an audio signal supplied from the mobile phone device or an audio signal supplied to the mobile phone device. A second connector provided separately from the first connector having an output terminal and having an input terminal supplied with charging power from an external charger; and the external connector through the second connector From the charger The supplied charging power and charging power from the charging circuit are supplied to the first connector as charging power for charging a rechargeable battery built in the mobile phone device, and the mobile phone device is sufficiently charged. In some cases, a charge control circuit for charging the secondary battery by supplying the charging power supplied from the external charger via the second connector to the secondary battery, and from the mobile phone device It has an output terminal for outputting an audio output signal of the mobile phone device supplied through the first connector.

  Furthermore, the present invention is characterized in that the battery-powered mobile phone charger with voice input / output terminal includes a Bluetooth incoming unit for exchanging information with an external device having a communication function.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that it can provide the battery type mobile telephone charger with a voice input / output terminal with favorable voice quality, and can contribute to the improvement of the usability for a user.

1 is a circuit diagram of a battery-powered mobile phone charger according to an embodiment of the present invention. 1 is a first external view of a battery-powered mobile phone charger according to an embodiment of the present invention. It is a 2nd external view of the battery-type mobile phone charger in one Example of this invention. It is a circuit diagram of the battery-powered mobile phone charger in another embodiment of the present invention. 1 is a circuit block diagram of a battery-powered mobile phone charger using a secondary battery in one embodiment of the present invention. It is another circuit block diagram of the battery-type mobile phone charger using the secondary battery in one Example of this invention. It is another circuit block diagram of the battery-powered mobile telephone charger using the secondary battery in one Example of this invention. 1 is a circuit block diagram of a battery-powered mobile phone charger corresponding to a Bluetooth incoming call in one embodiment of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a circuit diagram of a battery-powered mobile phone charger according to an embodiment of the present invention. Reference numeral 1 denotes a DC power source such as a removable battery. A charging circuit 2 charges a battery built in a mobile phone (not shown). Reference numeral 3 denotes a switch circuit for removing noise from the voice. Reference numeral 4 denotes a jack for connecting an external earphone (not shown). Reference numerals 5 and 6 denote multi-pin connectors (here, 10 pins as an example), and a mobile phone to be charged is connected to a mail-type (also referred to as male) connector 5. The connector 6 is a female type (also referred to as a female type), and is connected to an earphone microphone as exemplified in Non-Patent Document 1. That is, either an earphone having a jack or an earphone microphone having a multi-pin connector can be used. Although the circles in the connectors 5 and 6 are not directly related to the present invention, they are connection terminals of the coaxial cable, and also have a function of making the vertical direction easy to understand when mated with an external connector.

  FIG. 2 is a first external view of a battery-powered mobile phone charger according to an embodiment of the present invention. FIG. 3 is a second external view of the battery-powered mobile phone charger in one embodiment of the present invention. FIG. 3 is drawn from an oblique upper side opposite to FIG. Reference numeral 51 denotes a movable lid, and reference numeral 7 denotes an exterior case, but the other components are given the same numbers when corresponding to FIG. The outer case 7 incorporates the battery 1, the charging circuit 2, and the switch circuit 3 of FIG. 1, and is provided with jacks 4 and connectors 5 and 6 as audio terminals at positions where they can be connected to external elements. .

  That is, as the first feature of the present invention, since the jack 4 and the connector 6 are provided independently of the connector 5, the audio terminal can be used even during charging, and the audio terminal is in use. Can also be charged. Moreover, since the jack 4 and the connector 6 are provided in the battery-powered mobile phone charger, there is no deterioration in usability as described above.

The operation of the charging circuit 2 will be described with reference to FIG.
A DC power source 1 including a dry battery is connected between battery terminals 21 (+ side) and 22 (− side). Reference numeral 23 denotes a step-up chopper circuit that boosts a DC voltage by a switching operation using the coil L1. For example, when the output of the DC power source 1 is 3 V (two dry batteries in series), a voltage boosted to about 5 V (no load) is obtained on the cathode side of the diode D1 for backflow prevention. The DC power supplied to pin 5 of connector 5 through fuse F1 charges a battery built in the mobile phone. During this charging, the user can make a hands-free call, for example, using the jack 4 or the audio terminal of the connector 6. Further, a positive voltage is applied to the base of the transistor Q2, and the LED is turned on to indicate that charging is in progress. Capacitances C2 and C3 are smoothing capacitors.

  By the way, when an audio signal is used during charging as described above, a new problem may occur. In mobile phones, the ground of the circuit that processes analog signals (hereinafter referred to as analog ground) and the ground of the circuit that processes digital signals (hereinafter referred to as digital ground) are provided separately on the circuit board. Both are short-circuited at the location. In addition, instead of directly short-circuiting, for example, the noise superimposed on the digital ground may be short-circuited through a filter for preventing rotation of the noise to analog ground. In the connector 5 of the cellular phone shown in FIG. 1, pin 1 is digital ground and pin 10 is analog ground. When charging the battery, by inserting the mobile phone into the connector 5, the analog ground and the digital ground on the charger side become common, and charging is started. For this reason, noise from the digital ground is superimposed on the audio signal output from the mobile phone to the jack 4 or the connector 6. That is, a matter that did not become a problem when charging and a call are not performed simultaneously appears as a new problem.

  In order to solve this problem, in this embodiment, a switch circuit 3 for noise removal is provided. If the voltage of the DC power supply 1 is equal to or higher than a predetermined value, a predetermined potential is applied to the gate of the switch circuit 3 composed of the N-type MOSFET pair via the transistor Q1, and the switch is turned on. The analog ground indicated by the ground mark in the drawing is short-circuited between pin 1 of connector 5 which is the digital ground of the mobile phone. For this reason, noise from the digital ground can be greatly reduced, and noise caused by the above-described matters is reduced from the audio signal output to the jack 4 and the connector 6.

  Furthermore, the provision of the above-described noise removing switch circuit 3 may cause a new problem. Since the switch circuit 3 is added as a new load to the power supply, ripple occurs in the power supply connected to pin 5 of the connector 5, and in the worst case, the mobile phone determines that the power supply is defective and shuts down (power OFF ) Therefore, in the present invention, the charging circuit 2 is provided with a constant voltage diode ZDI, and, for example, a Zener voltage is used to reduce a large amplitude ripple. The function of the constant voltage diode is to reduce ripples, which is different from the constant voltage operation when creating a low voltage power source from a high voltage power source. As described above, if the 5-pin DC voltage of the connector 5 is about 5V when there is no load, the Zener voltage may be about 5.6V. Note that the capacitor C3 in FIG. 1 also has a function of removing inherent noise generated by the constant voltage diode ZDI.

  In other words, in the present invention, as a second feature, the noise removal switch circuit 3 is used to eliminate the problem of noise during charging, thereby improving the quality of the audio signal. As the third feature, a constant voltage diode is used. By using ZDI to eliminate the occurrence of ripples, it is possible to satisfactorily use the audio signal being charged.

  Finally, of the pins of the connectors 5 and 6 shown in FIG. Pins 2 and 3 are audio outputs (2 channels). Pin 4 is a logic signal indicating whether the stereo mode is (Low) or not (High), and here, an example is shown in which it is connected to pin 10 (analog ground) of the connector 5 for use in the stereo mode. Pin 6 is a logic signal indicating whether or not an earphone or an earphone microphone is connected to the jack 4 or the connector 6, and pin 8 is a logic signal indicating the start or outgoing call. Pin 9 is an audio signal from a microphone, and is input from an earphone microphone connected to the connector 6, for example. In addition, since an earphone microphone is mainly connected to the connector 6, there is no need for a digital ground, and an example in which both the 1st pin and the 10th pin are analog grounds is shown.

  The embodiments described so far are merely examples and do not limit the present invention. For example, the circuit diagram of FIG. 1 is an example, and many variations are possible. The number of pins, the structure and the shape of the connectors 5 and 6 may be arbitrarily determined. Moreover, the external shape of FIG.2 and FIG.3 is an example, and can change many layouts of the connectors 5 and 6 and the jack 4. FIG. Although the case where a battery such as a dry battery is used as a power source for charging has been shown, the present invention can also be applied when an AC adapter or a high voltage DC power source is used. Either case is within the scope of the present invention.

Hereinafter, further different embodiments of the present invention will be described. In FIG. 1, a dry battery is used as the DC power source 1. Of course, it is premised that when the life of the dry battery is exhausted, it is replaced with another dry battery. Instead of the dry battery, a secondary battery such as a lithium ion battery that can be repeatedly charged and used may be used. When charging is necessary, remove it and charge with another charger.
For example, it may be a single-use type that has a built-in dry battery and does not require battery replacement. In this case, as shown in FIG. 4, the DC power source 1 is fixedly connected to the charging circuit 2, and the battery terminals 21 and 22 in FIG. 1 are not necessary.

Furthermore, in the following embodiment, a secondary battery such as a lithium ion battery or a lithium polymer battery is built in, and a secondary battery with a voice input / output terminal incorporating a charge control circuit for repeatedly charging and using the battery. A battery-powered mobile phone charger will be described.
In this case, a connector for supplying a power source for charging a built-in secondary battery from the outside is required. In this embodiment, this connector is not newly provided, but the increase in the number of parts is prevented by utilizing the pins of the female connector 6. That is, the connector 6 is shared not only as a voice input / output terminal but also as a connector for external charging.

  When an external power source for charging is connected, the connector 6 functions as an input terminal for a built-in secondary battery or a power source for charging a mobile phone connected to the connector 5 as described later. When the earphone microphone is connected, it functions as a voice input / output terminal to the mobile phone connected to the connector 5. Note that even when an external power supply for charging is connected to the connector 6, the sound output from the jack 4 can be used, so that the earphone connected to the jack 4 can obtain a sound with good quality with reduced noise. Can do.

  Next, an embodiment having a function of charging a built-in secondary battery will be described with reference to the drawings. FIG. 5 is a circuit block diagram of a battery-powered mobile phone charger using a secondary battery in one embodiment of the present invention. In FIG. 5, unlike FIG. 1, an LED lighting circuit and a smoothing capacitor are omitted to simplify the drawing. The secondary battery 11 is built-in and need not be removed. The booster circuit 230 includes peripheral components such as a coil L1 and a diode D1 in addition to the booster circuit 23 of FIG. The noise removal circuit 30 includes peripheral components such as the transistor Q1 in addition to the switch circuit 3 of FIG. The ripple limiting circuit 8 includes the Zener diode ZD1 shown in FIG. Further, a backflow prevention diode D2 and a charge control circuit 13 are newly added. In FIG. 1, the 5 pins of the connector 6 are empty pins, but in FIG. 5, DC power from an external charger (not shown) is supplied to the 5 pins. This DC power supply is supplied to the anode of the diode D2 and the charge control circuit 13.

  First, a state where a mobile phone is connected to the connector 5 and the external charger is connected to the connector 6 will be described. In this case, charging the built-in battery of the mobile phone has priority over the secondary battery 11 built in the battery-powered mobile phone charger. The DC power supplied from the 5th pin of the connector 6 is supplied to the mobile phone connected from the 5th pin of the connector 5 through the diode D2, and charges the secondary battery built in the mobile phone. The charging control circuit 13 has a current detection function for monitoring the charging current to the mobile phone flowing through the diode D2, and when the charging current to the mobile phone is larger than a predetermined value, the battery built in the mobile phone Is determined to be charging. At this time, the charging control circuit 13 functions so as not to supply the DC power supplied from the 5th pin of the connector 6 to the secondary battery 11 built in the battery-powered mobile phone charger. That is, if the battery built in the mobile phone is being charged, this is prioritized.

  Charging of the mobile phone is terminated when the end of charging is detected on the mobile phone side. When the charging current to the mobile phone becomes smaller than a predetermined value, the charging control circuit 13 determines that charging of the mobile phone is completed, and the DC power supplied from the 5 pin of the connector 6 is a battery type. The secondary battery 11 is supplied to the secondary battery 11 built in the mobile phone charger and charges the secondary battery 11. For example, the charging control circuit 13 may include a charging circuit having a constant current output and a control circuit for stopping charging when the charging current is smaller than a predetermined value. Thereby, if the secondary battery 11 is fully charged, the charging operation is terminated.

  When the external charger is connected to the connector 6, the user can monitor the sound from the mobile phone in stereo by connecting an earphone to the jack 4. This voice can be monitored in a good quality state by the action of the noise removing circuit 30 and the ripple limiting circuit 8 as described above.

  In the example of FIG. 5, even when the charging control circuit 13 is charging the secondary battery 11, if a cell phone with insufficient charging is connected to the connector 5, charging of the cell phone is started immediately. be able to. In this case, charging of the secondary battery 11 is stopped.

Further, as a further effect in the case of FIG. 5, there is a good power utilization efficiency. If the power from the secondary battery 11 is used when charging the mobile phone, the power is wasted by the loss generated in the booster circuit 230. On the other hand, in FIG. 5, when the external charger is connected to the connector 6, the power supplied from the charger is directly charged to the mobile phone without going through the booster circuit 230. There is an advantage that the above-mentioned loss does not occur.
Needless to say, when the external charger is not connected to the connector 6, the mobile phone connected to the connector 5 is charged with the power supplied from the secondary battery 11.

Further, in FIG. 5, unlike FIGS. 1 and 4, the 4 pins of the connector 6 are open and are not connected to the 4 pins of the connector 5. As described above, the logic signal indicating whether the audio is in the stereo mode (Low) or not (High) is connected to the 4th pin of the connector 5. Here, assuming that it is a stereo mode, it is directly connected to a 10-pin analog ground and set to Low. On the other hand, some of the chargers connected to the connector 6 are, for example, compatible with data communication, and have 4 pins as a power source for data communication. When such a charger is connected to the connector 6, the power supply is short-circuited to the 10-pin analog ground. Therefore, here, the 4 pins of the connector 6 are not connected to the 4 pins of the connector 5 as vacant pins.
Of course, also in FIG.1 and FIG.4, when there exists a possibility that the above-mentioned charger may be connected, it is good to open | release 4 pins of the connector 6 similarly.

  FIG. 6 is another circuit block diagram of a battery-powered mobile phone charger using a secondary battery according to an embodiment of the present invention. Here, unlike FIG. 5, an example is shown in which a connector 6A for connecting an external charger is provided separately from the connector 6 for connecting an earphone microphone. The 4 pins of the connector 6 are connected to the 4 pins of the connector 5 as in FIG. 1 and FIG. 4, but the 4 pins of the connector 6A are empty pins as in FIG. In FIG. 6, it is necessary to additionally provide a connector 6A as compared with FIG. 5, and this is not desirable in terms of space or cost, but the problem of the 4-pin described above can be solved similarly to FIG. In addition, it is possible to talk using the earphone microphone connected to the connector 6 while charging the mobile phone connected to the connector 5 with the charger connected to the connector 6A.

  Incidentally, in the embodiment of FIG. 5, there may occur a problem that noise is superimposed on the audio signal again. This will be described. When the external charger described above is connected to the connector 6, the power supply noise of the charger itself may be superimposed on the 10 pin of the connector 6, that is, the analog ground. Since this noise is superimposed on the ground of the jack 4, it causes a problem that it is heard as noise in the headphones connected to the jack 4. In the case of FIG. 6, it is possible to prevent noise from appearing in the headphones connected to the jack 4 by connecting the 10 pin of the connector 6A to the 1 pin of the connector 5, that is, the digital ground. However, in the case of FIG. 5, further circuit improvements are required. This will be described with reference to FIG.

  FIG. 7 is still another circuit block diagram of a battery-powered mobile phone charger using a secondary battery according to an embodiment of the present invention. The difference is that a second noise removing circuit 9 is added as compared with FIG. For example, the second noise removal circuit 9 may have a small relay switch having two contacts as shown by being surrounded by a broken line in the figure, and if a predetermined effect can be obtained, it has a transistor switch. You may do it.

  Normally, the two relay switches are connected to the side indicated by the black dots as shown, and the battery-powered mobile phone charger is in the same state as in FIG. When DC power for charging is supplied to the 5 pin of the connector 6 from an external charger, the coil of the relay switch is excited via the backflow prevention diode D3. On the contrary, it is connected to the side indicated by a white dot. Accordingly, the 10-pin analog ground of the connector 5, that is, the ground of the jack 4 can be released from the ground of the external charger connected to the 1-pin and 10-pin of the connector 6, and the headphones connected to the jack 4 can be opened. There is an effect that noise is not superimposed on the voice.

Next, further embodiments of the present invention will be described.
FIG. 8 is a circuit block diagram of a battery-powered mobile phone charger corresponding to Bluetooth incoming calls in one embodiment of the present invention. Compared with FIG. 7, a feature is that a Bluetooth incoming unit 100 is added.

  Bluetooth refers to a short-range communication standard for digital devices that has been established in recent years. For example, when a mobile phone in a bag placed on a train shelf receives an incoming call, a Bluetooth incoming call notification is sent to the Bluetooth incoming unit worn by the owner based on the Bluetooth standard. Informs the owner of the incoming call by voice or vibration. In addition, various applications are considered such as the owner sending an instruction to disconnect communication from the Bluetooth receiving unit to the mobile phone based on the Bluetooth standard.

  In FIG. 8, the Bluetooth incoming unit 100 is activated by, for example, a slide type power switch 100C. For example, the antenna 100A receives a notification that a mobile phone has received an incoming call by communication based on the Bluetooth standard. Then, the Bluetooth receiving unit 100 turns on or blinks the photodiode 100B, for example, and notifies the mobile phone owner of the incoming call to the mobile phone. When the owner presses the one-shot type reset switch 100D, for example, the notification of the incoming call is terminated.

  Currently, the problem with the Bluetooth receiving unit is that the power consumption is large, and the user has to frequently charge the built-in rechargeable battery. Alternatively, the built-in rechargeable battery must have a large capacity. Further, in the connector 5 of FIG. 7, charging not only the mobile phone but also the Bluetooth receiving unit requires a long time to charge both of them individually, and the user needs to frequently change the equipment to be charged. There is. Of course, it is necessary to reduce the current consumption of the Bluetooth receiving unit itself, but since wireless communication requires a predetermined transmission power, there is a limit, and it is important to obtain improvement measures from the viewpoint of usability.

The embodiment of FIG. 8 is characterized in that the Bluetooth incoming unit 100 is built in the battery-powered mobile phone charger of this embodiment, and the Bluetooth incoming unit 100 is operated with DC power supplied from the secondary battery 11. . The Bluetooth incoming unit 100 may use DC power from the secondary battery 11 as an operating power supply, or may be charged with DC power from the secondary battery 11 after a built-in rechargeable battery is used as the operating power supply. . As a result, the user only needs to be aware of charging the mobile phone, and the usability can be greatly improved. This embodiment has one feature in that the Bluetooth incoming unit that needs to be repeatedly charged with a battery is incorporated in a charger to improve usability.
In the embodiments shown in FIG. 5 to FIG. 8, further modified embodiments can be considered within the scope of the present invention. For example, in FIG. 5, the ripple limiting circuit 8 may be provided on the side close to the connector 5 of the diode D2. The connection between the mobile phone and the battery-powered mobile phone charger is not limited to the connector but may be a cable, and the shape of the connector is not limited. Either case is within the scope of the present invention.

  1: DC power supply, 2: charging circuit, 3: switch circuit, 4: jack, 5: connector, 6: connector, 7: exterior case, 8: ripple limiting circuit, 9: second noise removing circuit, 11: two Secondary battery, 13: charge control circuit, 30: noise removal circuit, 100: Bluetooth incoming unit.

Claims (8)

A battery-powered mobile phone charger with a voice input / output terminal for charging a rechargeable battery built in a mobile phone device using a battery as a power source and inputting or outputting a voice signal,
A charging circuit for charging a rechargeable battery built in the mobile phone device using a power source from the battery;
A first connector which is supplied with output power of the charging circuit and supplies the output power to the connected mobile phone device;
Even when the mobile phone device is connected to the first connector, the audio signal supplied from the mobile phone device is output or the audio signal supplied to the mobile phone device is input. A battery-powered mobile phone charger with a voice input / output terminal, comprising: a second connector provided separately from the first connector.   The battery-powered mobile phone charger with a voice input / output terminal according to claim 1, further comprising a noise reduction circuit for reducing noise included in a voice signal supplied from the mobile phone device. Battery-powered mobile phone charger with terminal.   The battery-powered mobile phone charger with a voice input / output terminal according to claim 2, further comprising a ripple removal circuit for reducing a ripple included in the output of the charging circuit. Mobile phone charger. A rechargeable battery type mobile phone charger with a voice input / output terminal for charging a rechargeable battery built in a mobile phone device using a secondary battery as a power source and inputting or outputting a voice signal,
A charging circuit for charging a rechargeable battery built in the mobile phone device using a power source from the secondary battery;
A charge control circuit for charging the secondary battery;
A first connector for supplying output power for charging a rechargeable battery built in the mobile phone device to the mobile phone device;
An input terminal having an input / output terminal for inputting an audio signal supplied from the mobile phone device or an audio signal supplied to the mobile phone device, and being supplied with charging power from an external charger. A second connector provided separately from the first connector comprising:
The charging power supplied from the external charger via the second connector and charging power from the charging circuit are used as charging power for charging a rechargeable battery built in the mobile phone device. When the mobile phone device is sufficiently charged, the charging power supplied from the external charger is supplied to the secondary battery via the second connector. A charge control circuit for charging the battery;
Charging a secondary battery type mobile phone with a voice input / output terminal, comprising: an output terminal for outputting a voice output signal of the mobile phone device supplied from the mobile phone device via the first connector vessel.   5. The secondary battery type mobile phone charger with a voice input / output terminal according to claim 4, further comprising a noise reduction circuit for reducing noise contained in a voice signal supplied from the mobile phone device. Secondary battery type mobile phone charger with input / output terminals.   5. The secondary battery type mobile phone charger with voice input / output terminal according to claim 4, further comprising a ripple removal circuit for reducing a ripple included in the output of the charging circuit. Secondary battery type mobile phone charger.   5. The secondary battery type mobile phone charger with a voice input / output terminal according to claim 4, further comprising a second noise reduction circuit for reducing noise supplied from an external charger. Secondary battery type mobile phone charger with terminal.   5. The secondary battery type mobile phone charger with voice input / output terminal according to claim 4, further comprising a Bluetooth incoming unit for exchanging information with an external device having a communication function. Secondary battery type mobile phone charger.

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