JP2009021910A - Rechargeable hearing aid, and charging device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rechargeable hearing aid which can be charged without contacting without making large a hearing aid using a secondary battery, and to provide a charging device therefor. <P>SOLUTION: The rechargeable hearing aid includes the secondary battery 9, a coil 6 serving as both a secondary coil for charging the secondary battery 9 and an induction coil for receiving a sound signal converted into a magnetic wave signal, a magnetic switch 8 switching the coil 6 between a secondary coil mode and an induction coil mode, and a charging circuit 7 connected to the coil 6 and secondary battery 9 through the magnetic switch 8. The charging device 2 which charges the rechargeable hearing aid is provided with a primary coil 25 for charging the secondary battery 9 without contacting and a magnet 26 for operating the magnetic switch 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rechargeable hearing aid including a secondary battery and a charging device for charging the rechargeable hearing aid.

  Conventionally, a hearing aid equipped with a secondary battery that is charged in a contact or non-contact manner is known (see, for example, Patent Document 1). Moreover, the technique which provided the secondary coil in the rechargeable battery is known (for example, refer patent document 2). Furthermore, hearing aids are known that include an induction coil that generates an electromotive force by receiving induction from a magnetic field caused by a magnetic wave leaking from a telephone handset or a voice current flowing through a loop coil (see, for example, Patent Document 3). ).

JP 2006-174336 A JP 2005-117748 A Japanese Patent Application Laid-Open No. 09-018998

  However, in order to charge the secondary battery in a non-contact manner, a secondary coil for charging is required. Therefore, when the secondary battery is applied to a hearing aid equipped with an induction coil, there is a problem that the hearing aid becomes large. . In addition, when the secondary coil is provided in the rechargeable battery, the battery itself becomes large, and thus there is a problem that the hearing aid becomes large.

  The present invention has been made in view of such problems of the prior art, and the object of the present invention is to charge non-contacting without using a large hearing aid using a secondary battery. It is an object of the present invention to provide a rechargeable hearing aid and a charging device thereof.

  In order to solve the above problems, an invention according to claim 1 includes a secondary battery, a secondary coil for charging the secondary battery, and a coil that also serves as an induction coil that receives a sound signal converted into a magnetic wave signal. And a switching means for switching the secondary coil mode and the induction coil mode of the coil, and a charging circuit connected to the coil and the secondary battery via the switching means.

  According to a second aspect of the present invention, in the rechargeable hearing aid according to the first aspect, the switching means is constituted by a magnetic switch.

  According to a third aspect of the present invention, in the rechargeable hearing aid according to the first aspect, the switching means is operated by a sound having a predetermined frequency or a sound having a predetermined pattern.

  According to a fourth aspect of the present invention, in the rechargeable hearing aid according to the first aspect, the switching means is activated when a key having a predetermined shape is inserted.

  According to a fifth aspect of the present invention, in the rechargeable hearing aid according to any one of the first to fourth aspects, a light emitting diode is provided, and the light emitting diode is turned on when charging of the secondary battery is completed.

  According to a sixth aspect of the present invention, in the rechargeable hearing aid according to any one of the first to fourth aspects, when the secondary battery is fully charged, a sound having a predetermined frequency or a sound having a predetermined pattern is output from the earphone. I decided to let them.

  The invention according to claim 7 is a charging device for charging the rechargeable hearing aid according to any one of claims 1 to 6, wherein a primary coil for charging the secondary battery in a non-contact manner is provided. Is.

  According to an eighth aspect of the present invention, in the charging device according to the seventh aspect of the present invention, the magnet for operating the switching means constituted by a magnetic switch is provided.

  According to a ninth aspect of the present invention, in the charging device according to the seventh aspect, there is provided a sound output means for outputting a sound for operating a switching means that is operated by a sound having a predetermined frequency or a sound having a predetermined pattern.

  According to a tenth aspect of the present invention, in the charging device according to the seventh aspect, a key for operating a switching means that operates when a key having a predetermined shape is inserted is provided.

  According to an eleventh aspect of the present invention, in the charging device according to any one of the seventh to tenth aspects, when a light emitting diode and a microphone are provided, and a sound having a predetermined frequency or a predetermined pattern is detected by the microphone. Charge stop means for stopping charging and charge stop notification means for turning on or blinking the light emitting diode when the charge stop means stops charging.

  The invention according to claim 12 is the charging device according to any one of claims 7 to 11, wherein the charging set unit for setting the rechargeable hearing aid to charge the secondary battery is a drying case or a drying device. It also serves as.

According to the invention which concerns on Claim 1, a secondary battery can be charged non-contactingly, without enlarging a hearing aid.

According to the second aspect of the invention, since the induction coil and the secondary coil are automatically switched by the magnetic switch, the secondary battery can be charged only by setting the rechargeable hearing aid in the charging device.

  According to the third aspect of the invention, since the induction coil and the secondary coil are automatically switched at a predetermined frequency or a predetermined pattern, the secondary battery can be simply set by setting the rechargeable hearing aid in the charging device. Can be charged.

  According to the fourth aspect of the present invention, since the induction coil and the secondary coil are automatically switched by simply inserting a key having a predetermined shape, the secondary battery can be installed only by setting the rechargeable hearing aid in the charging device. Can be charged.

  According to the fifth aspect of the invention, since the completion of charging is notified by light, even a hearing-impaired person can easily recognize the completion of charging.

  According to the sixth aspect of the present invention, since the sound of a predetermined frequency or the sound of a predetermined pattern is output from the earphone, the configuration is easy.

  According to the invention which concerns on Claim 7, a secondary battery can be charged non-contactingly, without enlarging a hearing aid.

  According to the eighth aspect of the invention, since the induction coil and the secondary coil are automatically switched by the magnetic switch, the secondary battery can be charged only by setting the rechargeable hearing aid in the charging device.

  According to the invention of claim 9, since the induction coil and the secondary coil are automatically switched at a predetermined frequency or sound with a predetermined pattern, the secondary battery can be obtained simply by setting the rechargeable hearing aid to the charging device. Can be charged.

  According to the invention of claim 10, since the induction coil and the secondary coil are automatically switched only by inserting a key having a predetermined shape, the secondary battery can be installed only by setting the rechargeable hearing aid to the charging device. Can be charged.

  According to the invention which concerns on Claim 11, even if it is non-contact charge, overcharge can be prevented, without mounting new components on the secondary side.

  According to the invention of claim 12, since the hearing aid can be dried while being charged, it is convenient for the wearer.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a block diagram of the first embodiment of the present invention, FIG. 2 is a layout diagram of the rechargeable hearing aid in the first embodiment, FIG. 3 is a block diagram of the second embodiment, and FIG. Is a layout diagram of the rechargeable hearing aid in the second embodiment, FIG. 5 is a block diagram of the third embodiment, FIG. 6 is a layout diagram of the rechargeable hearing aid in the third embodiment, and FIG. 7 is an outline of the charging device. It is explanatory drawing.

  As shown in FIGS. 1 and 2, the first embodiment of the present invention includes a rechargeable hearing aid 1 and a charging device 2 that charges the rechargeable hearing aid 1. The rechargeable hearing aid 1 includes a microphone 3, a DSP (Digital Signal Processor) 4, an earphone 5, a coil 6 that doubles as an induction coil and a secondary coil for charging, a charging circuit 7, a magnetic switch 8, a secondary battery 9, an operation unit 10, A light emitting diode (LED) 11 is provided. The rechargeable hearing aid 1 can be applied in either an ear shape or an ear hook shape.

  The DSP 4 constitutes a hearing aid processing unit 12, a setting storage unit 13, a setting switching unit 14, a switch switching unit 15, a voltage monitoring unit 16, a coil switching switch 17, and a charging circuit switching switch 18. The coil changeover switch 17 and the charging circuit changeover switch 18 may not be configured by the DSP 4 but may be configured by separate circuits.

  In the normal use mode (induction coil mode), the coil changeover switch 17 works to connect the hearing aid processing unit 12 and the coil 6. Whether the signal input from the microphone 3 or the signal input from the coil 6 is to be used or mixed is determined by the setting switching unit 14 by the operation of the operation unit 10 of the user by the setting switching unit 14. Control to switch. Further, the charging circuit changeover switch 18 is opened. The power of the secondary battery 9 is supplied to the DSP 4.

  In the charging mode (secondary coil mode), the coil changeover switch 17 works to connect the coil 6 and the charging circuit 7. The charging circuit changeover switch 18 functions to connect the secondary battery 9 and the charging circuit 7. At that time, power is supplied from the secondary battery 9 to the DSP 4, and the DSP 4 is in an operating state.

  The charging device 2 includes a control unit 20, a microphone 21, an operation unit 22, a light emitting diode (LED) 23, a charging circuit 24, a primary coil 25, a magnet 26, and a power supply unit (not shown). Further, the charging device 2 is formed with a charging set portion (not shown) for setting the rechargeable hearing aid 1 during charging.

  The operation of the first embodiment of the present invention configured as described above will be described. First, the rechargeable hearing aid 1 is set in the charging set unit of the charging device 2. It is only necessary to place the rechargeable hearing aid 1 on the charging set unit. Then, the magnetic switch 8 provided in the rechargeable hearing aid 1 reacts to the magnet 26 provided in the charging device 2, and the rechargeable hearing aid 1 is switched from the normal use mode to the charging mode.

  In the charging mode, the charging circuit switch 18 connects the secondary battery 9 and the charging circuit 7, and the coil switching switch 17 connects the charging circuit 7 and the coil 6. Even in the charging mode, power is supplied from the secondary battery 9 to the DSP 4. In the charging mode, the coil 6 functions as a secondary coil for charging. When an operation for starting charging is performed with the operation unit 22 of the charging device 2, a current supplied from a power supply unit (not shown) flows to the primary coil 25, and passes through the coil 6 and the charging circuit 7 of the rechargeable hearing aid 1. Then, charging of the secondary battery 9 is started.

  When the rechargeable hearing aid 1 is switched from the normal use mode to the charging mode, the switch switching unit 15 sends a signal informing the hearing aid processing unit 12 that the charging mode has been switched, and the hearing aid processing unit 12 A sound having a predetermined pattern can be output from the earphone 5. The sound output from the earphone 5 may be an ultrasonic wave. When the microphone 21 of the charging device 2 receives the sound from the earphone 5 and recognizes that the rechargeable hearing aid 1 is in the charging mode, the charging is automatically performed without performing the operation of starting charging with the operation unit 22. It can also be started.

  The voltage monitoring unit 16 monitors the voltage of the secondary battery 9. When the secondary battery 9 is sufficiently charged, a voltage completion signal is output from the voltage monitoring unit 16 to the switch switching unit 15 to switch from the charging mode to the normal use mode. As described above, the DSP 4 determines that the secondary battery 9 is sufficiently charged and switches from the charging mode to the normal use mode, thereby preventing heat generation due to overcharging of the secondary battery 9.

  In addition, a charging completion signal can be output from the voltage monitoring unit 16 to the hearing aid processing unit 12, and a sound having a predetermined frequency or a sound having a predetermined pattern can be output from the earphone 5. The sound output from the earphone 5 may be an ultrasonic wave. Thereafter, the power source of the rechargeable hearing aid 1 can be automatically turned off. Further, the LED 11 provided in the rechargeable hearing aid 1 can be turned on to notify that the charging of the secondary battery 9 is completed.

  When the microphone 21 provided in the charging device 2 receives a sound output from the earphone 5, the charging device 2 finishes the charging operation and turns on the LED 23 to notify that the charging of the secondary battery 9 is completed. To do.

  Next, as shown in FIGS. 3 and 4, the second embodiment of the present invention includes a rechargeable hearing aid 31 and a charging device 32 that charges the rechargeable hearing aid 31. The rechargeable hearing aid 31 includes a microphone 3, a DSP (Digital Signal Processor) 4, an earphone 5, a coil 6 serving as both an induction coil and a secondary coil for charging, a charging circuit 7, a secondary battery 9, an operation unit 10, a light emitting diode (LED) ) 11. The rechargeable hearing aid 31 can be applied in either an ear shape or an ear hook shape.

  The DSP 4 constitutes a hearing aid processing unit 12, a setting storage unit 13, a setting switching unit 14, a switch switching unit 15, a voltage monitoring unit 16, a coil switching switch 17, and a charging circuit switching switch 18. The coil changeover switch 17 and the charging circuit changeover switch 18 may not be configured by the DSP 4 but may be configured by separate circuits.

  In the normal use mode (induction coil mode), the coil changeover switch 17 works to connect the hearing aid processing unit 12 and the coil 6. Whether the signal input from the microphone 3 or the signal input from the coil 6 is to be used or mixed is determined by the setting switching unit 14 by the operation of the operation unit 10 of the user by the setting switching unit 14. Control to switch. Further, the charging circuit changeover switch 18 is opened. The power of the secondary battery 9 is supplied to the DSP 4.

  In the charging mode (secondary coil mode), the coil changeover switch 17 works to connect the coil 6 and the charging circuit 7. The charging circuit changeover switch 18 functions to connect the secondary battery 9 and the charging circuit 7. At that time, power is supplied from the secondary battery 9 to the DSP 4, and the DSP 4 is in an operating state.

  The charging device 32 includes a control unit 20, a microphone 21, an operation unit 22, a light emitting diode (LED) 23, a charging circuit 24, a primary coil 25, a speaker 27, and a power supply unit (not shown). Further, the charging device 32 is formed with a charging set portion (not shown) for setting the rechargeable hearing aid 31 during charging.

  The operation of the second embodiment of the present invention configured as described above will be described. First, the rechargeable hearing aid 31 is set in the charging set unit of the charging device 32. It is only necessary to place the rechargeable hearing aid 31 on the charging set unit. When a charging preparation operation is performed by the operation unit 22 provided in the charging device 32, a sound of a predetermined frequency or a sound of a predetermined pattern is emitted from the speaker 27. The sound output from the speaker 27 may be an ultrasonic wave. When the rechargeable hearing aid 31 receives the sound output from the speaker 27 by the microphone 3, it is recognized by the hearing aid processing unit 12, and the rechargeable hearing aid 31 is switched from the normal use mode to the charging mode.

  In the charging mode, the charging circuit switch 18 connects the secondary battery 9 and the charging circuit 7, and the coil switching switch 17 connects the charging circuit 7 and the coil 6. Even in the charging mode, power is supplied from the secondary battery 9 to the DSP 4. In the charging mode, the coil 6 functions as a secondary coil for charging. When an operation for starting charging is performed at the operation unit 22 of the charging device 32, a current supplied from a power supply unit (not shown) flows to the primary coil 25, and passes through the coil 6 and the charging circuit 7 of the rechargeable hearing aid 31. Then, charging of the secondary battery 9 is started.

  Further, when the rechargeable hearing aid 31 is switched from the normal use mode to the charging mode, the switch switching unit 15 sends a signal notifying the hearing aid processing unit 12 that the switching to the charging mode has been performed, and the hearing aid processing unit 12 A sound having a predetermined pattern can be output from the earphone 5. The sound output from the earphone 5 may be an ultrasonic wave. Then, when the microphone 21 of the charging device 32 receives the sound from the earphone 5 and recognizes that the rechargeable hearing aid 31 is in the charging mode, the operation unit 22 automatically performs charging without performing the charging start operation. It can also be started.

  The voltage monitoring unit 16 monitors the voltage of the secondary battery 9. When the secondary battery 9 is sufficiently charged, a voltage completion signal is output from the voltage monitoring unit 16 to the switch switching unit 15 to switch from the charging mode to the normal use mode. As described above, the DSP 4 determines that the secondary battery 9 is sufficiently charged and switches from the charging mode to the normal use mode, thereby preventing heat generation due to overcharging of the secondary battery 9.

  In addition, a charging completion signal can be output from the voltage monitoring unit 16 to the hearing aid processing unit 12, and a sound having a predetermined frequency or a sound having a predetermined pattern can be output from the earphone 5. The sound output from the earphone 5 may be an ultrasonic wave. Thereafter, the power source of the rechargeable hearing aid 31 can be automatically turned off. Further, the LED 11 provided in the rechargeable hearing aid 31 can be turned on to notify that the charging of the secondary battery 9 is completed.

  And if the microphone 21 provided in the charging device 32 receives the sound which the earphone 5 outputs, the charging device 32 will complete | finish charge operation and will light LED23, and it will alert | report that the charge of the secondary battery 9 was completed. To do.

  Next, as shown in FIGS. 5 and 6, the third embodiment of the present invention includes a rechargeable hearing aid 41 and a charging device 42 that charges the rechargeable hearing aid 41. The rechargeable hearing aid 41 includes a microphone 3, a DSP (Digital Signal Processor) 4, an earphone 5, a coil 6 that doubles as an induction coil and a secondary coil for charging, a charging circuit 7, a secondary battery 9, an operation unit 10, a light emitting diode (LED) 11) A push button switch 19 is provided. The case 43 of the rechargeable hearing aid 41 is formed with a key insertion slot 44 into which only a key having a predetermined shape can be inserted, and the push button switch 19 is disposed in the back thereof. The rechargeable hearing aid 41 can be applied in either an ear shape or an ear hook shape.

  The DSP 4 constitutes a hearing aid processing unit 12, a setting storage unit 13, a setting switching unit 14, a switch switching unit 15, a voltage monitoring unit 16, a coil switching switch 17, and a charging circuit switching switch 18. The coil changeover switch 17 and the charging circuit changeover switch 18 may not be configured by the DSP 4 but may be configured by separate circuits.

  In the normal use mode (induction coil mode), the coil changeover switch 17 works to connect the hearing aid processing unit 12 and the coil 6. Whether the signal input from the microphone 3 or the signal input from the coil 6 is to be used or mixed is determined by the setting switching unit 14 by the operation of the operation unit 10 of the user by the setting switching unit 14. Control to switch. Further, the charging circuit changeover switch 18 is opened. The power of the secondary battery 9 is supplied to the DSP 4.

  In the charging mode (secondary coil mode), the coil changeover switch 17 works to connect the coil 6 and the charging circuit 7. The charging circuit changeover switch 18 functions to connect the secondary battery 9 and the charging circuit 7. At that time, power is supplied from the secondary battery 9 to the DSP 4, and the DSP 4 is in an operating state.

  The charging device 42 includes a control unit 20, a microphone 21, an operation unit 22, a light emitting diode (LED) 23, a charging circuit 24, a primary coil 25, a key 29, and a power supply unit (not shown). Further, the charging device 42 is formed with a charging set portion (not shown) for setting the rechargeable hearing aid 41 during charging. The key 29 is erected on the charging set portion, and the shape thereof may be a cylinder or a polygonal column, and the cross section may be a star shape, an arrow shape, or a front and rear circular shape column, and there is no particular limitation.

  The operation of the third embodiment of the present invention configured as described above will be described. First, the rechargeable hearing aid 41 is set in the charging set unit of the charging device 42. Here, setting the rechargeable hearing aid 41 refers to an operation of inserting the key 29 erected in the charge setting portion into the key insertion port 44 of the rechargeable hearing aid 41. When the key 29 is inserted into the key insertion slot 44 and the push button switch 19 is pressed, the rechargeable hearing aid 41 is switched from the normal use mode to the charge mode.

  In the charging mode, the charging circuit switch 18 connects the secondary battery 9 and the charging circuit 7, and the coil switching switch 17 connects the charging circuit 7 and the coil 6. Even in the charging mode, power is supplied from the secondary battery 9 to the DSP 4. In the charging mode, the coil 6 functions as a secondary coil for charging. When an operation for starting charging is performed at the operation unit 22 of the charging device 42, a current supplied from a power supply unit (not shown) flows to the primary coil 25 and passes through the coil 6 and the charging circuit 7 of the rechargeable hearing aid 41. Then, charging of the secondary battery 9 is started.

  Further, when the rechargeable hearing aid 41 is switched from the normal use mode to the charging mode, the switch switching unit 15 sends a signal notifying the hearing aid processing unit 12 that the charging mode has been switched, so that the hearing aid processing unit 12 generates a sound of a predetermined frequency or A sound having a predetermined pattern can be output from the earphone 5. The sound output from the earphone 5 may be an ultrasonic wave. When the microphone 21 of the charging device 42 receives the sound from the earphone 5 and recognizes that the rechargeable hearing aid 41 is in the charging mode, the charging is automatically performed without performing the operation of starting charging with the operation unit 22. It can also be started.

  The voltage monitoring unit 16 monitors the voltage of the secondary battery 9. When the secondary battery 9 is sufficiently charged, a voltage completion signal is output from the voltage monitoring unit 16 to the switch switching unit 15 to switch from the charging mode to the normal use mode. As described above, the DSP 4 determines that the secondary battery 9 is sufficiently charged and switches from the charging mode to the normal use mode, thereby preventing heat generation due to overcharging of the secondary battery 9.

  In addition, a charging completion signal can be output from the voltage monitoring unit 16 to the hearing aid processing unit 12, and a sound having a predetermined frequency or a sound having a predetermined pattern can be output from the earphone 5. The sound output from the earphone 5 may be an ultrasonic wave. Thereafter, the power source of the rechargeable hearing aid 41 can be automatically turned off. Further, the LED 11 provided in the rechargeable hearing aid 41 can be turned on to notify that the charging of the secondary battery 9 is completed.

  When the microphone 21 provided in the charging device 42 receives a sound output from the earphone 5, the charging device 42 ends the charging operation and turns on the LED 23 to notify that the charging of the secondary battery 9 is completed. To do.

  Further, as shown in FIG. 7A, the charging set portion of the charging devices 2, 32, and 42 for setting the rechargeable hearing aids 1, 31, and 41 can be a dry case 45. 46 is a desiccant. Further, as shown in FIG. 7B, the charging set unit is a drying chamber 47, and the charging devices 2, 32, and 42 are integrated with the dry air blowing device 48, so that the charging devices 2, 32, and 42 become the drying device. 49 can also be used. In this way, the rechargeable hearing aid 1, 31, 41 can be dried while being charged, which is convenient for the wearer.

  According to the present invention, it is possible to charge the secondary battery in a non-contact manner simply by setting the rechargeable hearing aid in the charging device, and the wearer is released from the troublesome work of battery replacement. Demand expansion is expected.

Block configuration diagram of the first embodiment Layout diagram of the rechargeable hearing aid in the first embodiment Block configuration diagram of the second embodiment Layout diagram of the rechargeable hearing aid in the second embodiment Block configuration diagram of the third embodiment Layout diagram of the rechargeable hearing aid in the third embodiment In the schematic explanatory diagram of the charging device, (a) when the charging set unit is a drying case, (b) is when the charging set unit is a drying chamber

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,31,41 ... Rechargeable hearing aid, 2,32,42 ... Charging device, 3,21 ... Microphone, 4 ... DSP, 5 ... Earphone, 6 ... Coil, 7,24 ... Charging circuit, 8 ... Magnetic switch, 9 ... secondary battery, 10, 22 ... operation unit, 11, 23 ... light emitting diode (LED), 12 ... hearing aid processing unit, 13 ... setting storage unit, 14 ... setting switching unit, 15 ... switch switching unit, 16 ... voltage monitoring , 17 ... Coil changeover switch, 18 ... Charging circuit changeover switch, 19 ... Push button switch, 20 ... Control part, 25 ... Primary coil, 26 ... Magnet, 27 ... Speaker, 29 ... Key, 43 ... Case, 44 ... Key Insertion port 45... Drying case 46. Desiccant 47. Drying chamber 48. Dry air blower 49.

Claims (12)

A secondary battery, a secondary coil for charging the secondary battery, a coil that also serves as an induction coil that receives a sound signal converted into a magnetic wave signal, and a secondary coil mode and an induction coil mode of the coil are switched. A rechargeable hearing aid comprising switching means and a charging circuit connected to the coil and the secondary battery via the switching means. The rechargeable hearing aid according to claim 1, wherein the switching unit includes a magnetic switch. The rechargeable hearing aid according to claim 1, wherein the switching means is operated by a sound having a predetermined frequency or a sound having a predetermined pattern. The rechargeable hearing aid according to claim 1, wherein the switching means is activated when a key having a predetermined shape is inserted. The rechargeable hearing aid according to any one of claims 1 to 4, wherein a light emitting diode is provided, and the light emitting diode is turned on when charging of the secondary battery is completed. The rechargeable hearing aid according to any one of claims 1 to 4, wherein when charging of the secondary battery is completed, a sound having a predetermined frequency or a sound having a predetermined pattern is output from the earphone. hearing aid. A charging device for charging the rechargeable hearing aid according to any one of claims 1 to 6, further comprising a primary coil for charging a secondary battery in a non-contact manner. The charging device according to claim 7, further comprising a magnet for actuating the switching means constituted by a magnetic switch. 8. The charging apparatus according to claim 7, further comprising a sound output means for outputting a sound for operating a switching means that operates according to a sound having a predetermined frequency or a sound having a predetermined pattern. The charging device according to claim 7, further comprising a key for operating switching means that operates when a key having a predetermined shape is inserted. The charging device according to any one of claims 7 to 10, comprising a light-emitting diode and a microphone, and charging stop means for stopping charging when a sound having a predetermined frequency or a sound having a predetermined pattern is detected by the microphone. A charging device comprising charging stop notification means for turning on or blinking the light emitting diode when the charging stopping means stops charging. The charging device according to any one of claims 7 to 11, wherein the charging set unit for setting the rechargeable hearing aid to charge the secondary battery also serves as a drying case or a drying device. Charging device.

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