JP2614568B2 - Remote control device for audio equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to audio equipment such as a disc player, and more particularly to a remote control device.

[0002]

2. Description of the Related Art Recently, an audio device called a headphone stereo, which is configured to reproduce and listen to a signal such as music reproduced from a disk player by headphones, has become widespread. Since such an audio device is generally used in a state in which the device main body is stored in a bag or the like, when switching the operation of the disc player, it is necessary to take out the device main body from the bag and perform the switching operation. Yes, very inconvenient. As a technique for improving such a point, there is a technique in which a remote control device for switching operation of a disc player is incorporated in headphones.

[0003]

In a disk player, it is possible to detect the number of a music piece for which a reproduction operation is being performed based on a signal recorded on the disk, and a display for displaying such a music piece number is provided. It is very convenient if the device is provided in the remote control unit. The present invention seeks to provide a remote control device incorporating such a display device.

[0004]

SUMMARY OF THE INVENTION A remote control device according to the present invention is incorporated in an audio equipment main body, controls the operation of a signal reproducing device, and controls a remote controller based on a signal obtained from the signal reproducing device. A first control circuit for transmitting data for display, a switching signal that is incorporated in the remote control unit and is supplied with operating power from the audio equipment body when a plug is inserted into the jack, and a switching signal accompanying a switching operation of an operation switch A second control circuit that sends the display data to the first control circuit, a display device that is incorporated in the remote control unit and that displays display data output from the first control circuit under the control of the second control circuit. And a reset circuit that operates when power is supplied to the remote control unit and resets the second control circuit.

[0005]

According to the present invention, when the reset operation of the second control circuit is performed by the reset circuit, the second control circuit sends a reset completion signal indicating that the reset operation has been performed to the first control circuit, The reset completion signal is the first
When input to the control circuit, the first control circuit sends display data to the second control circuit.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a remote control device according to the present invention; FIG. 1 is an electric circuit diagram incorporated in an audio equipment main body, and FIG.

In FIG. 1, reference numeral 1 denotes a signal reproducing device such as a disk player, which has a first output terminal 2 for outputting a left channel signal reproduced from a disk, and a second output terminal for outputting a right channel signal. 3 and a power supply terminal 4 to which an operation power is supplied. Reference numeral 5 denotes a first control circuit for controlling the operation of the signal reproducing apparatus 1; a power supply terminal 6 to which an operation power is supplied; an input / output terminal 7 for transmitting and receiving signals to and from a remote controller; A power control signal output terminal 8 for outputting an H (high) level signal when the device 1 is put into an operating state is provided, and a plurality of control signal paths are provided between the device 1 and the signal reproducing device 1. .

Reference numeral 9 denotes a first amplifier circuit which receives a left-channel reproduced signal output to a first output terminal 2 provided in the signal reproducing apparatus 1 and amplifies the signal.
Reference numeral 0 denotes a second amplifier circuit to which the right channel reproduction signal output to the second output terminal 3 is input and amplifies the signal. 11 is a battery housed in the main body of the audio equipment, 12
Is a booster circuit for boosting the voltage obtained from the battery 11 to a voltage value necessary for operating the signal reproducing device 1 and the first control circuit 5, and an output terminal 13 of the booster circuit is provided in the first control circuit 5. Connected to the power supply terminal 6.

Reference numeral 14 denotes a first power supply transistor whose emitter is connected to the output terminal 13 of the booster circuit 12 and whose collector is connected to the power supply terminal 4 provided in the signal reproducing device 1. Has the function of supplying the power obtained from the booster circuit 12 to the signal reproducing device when in the conductive state. Reference numeral 15 denotes a first control transistor whose collector is connected to the base thereof via a resistor 16 and whose emitter is grounded in order to control the operation of the first power supply transistor 14, and whose base is connected to the resistor 17. It is connected to a power control signal output terminal 8 provided in the first control circuit 5 via the power supply.

Reference numeral 18 denotes a second power supply transistor whose emitter is connected to the positive terminal of the battery 11 and whose collector is connected to the power supply terminals of the first amplifier circuit 9 and the second amplifier circuit 10. When the power is obtained from the battery 11 in the conductive state, the first amplifier 9
And an operation of supplying the signal to the second amplifier circuit 10. 1
Reference numeral 9 denotes a second control transistor whose collector is connected to its base via a resistor 20 and whose emitter is grounded in order to control the operation of the second power supply transistor 18, and whose base is connected to a resistor 21. It is connected to a power control signal output terminal 8 provided in the first control circuit 5 via the power supply.

Reference numeral 22 denotes a headphone jack into which a headphone plug is inserted, a first signal terminal 23 to which an output signal of the first amplifier circuit 9 is applied, and a second terminal to which an output signal of the second amplifier circuit 10 is applied. A second signal terminal 24, a ground terminal 25 that is grounded and contacts a ground plug terminal of the plug when the headphone plug is inserted, and an input / output terminal 7 provided in the first control circuit 5; Connected to the control terminal 26 which is in contact with the control plug terminal of the plug when the headphone plug is inserted and the output terminal 13 of the booster circuit 12 and the plug is inserted when the headphone plug is inserted. And a power supply terminal 27 that comes into contact with the power supply plug terminal.

As described above, the electric circuit incorporated in the main body of the audio equipment is constituted. Next, a headphone with a remote control will be described with reference to FIG.

[0013] In FIG 2, 28 is a headphone plug to be inserted into the headphone jack 22 provided to the acoustic apparatus body as described above, the first in contact with the first signal terminal 23 when it is inserted into the headphone jack 22 A signal plug terminal 29, a second signal plug terminal 30 that contacts the second signal terminal 24, a ground plug terminal 31 that contacts the ground terminal 25, a control plug terminal 32 that contacts the control terminal 26, and a power plug that contacts the power terminal 27. The terminal 33 is provided.

Reference numeral 34 denotes a first variable resistor for adjusting the signal level of the left channel, which is connected between the first signal plug terminal 29 and the ground plug terminal 31. Reference numeral 35 denotes a left channel speaker that emits a left channel signal, and is connected between the slider of the first variable resistor 34 and the ground plug terminal 31. A second variable resistor 36 adjusts the signal level of the right channel, and is connected between the second signal plug terminal 30 and the ground plug terminal 31. Reference numeral 37 denotes a right channel speaker that emits a right channel signal, and is connected between the slider of the second variable resistor 36 and the ground plug terminal 31.

Reference numerals 38, 39, 40, and 41 denote operation switches for reproduction, operation for stop, operation for fast-forward and operation for fast-return provided on the remote controller, and reference numeral 42 denotes a switching operation of each of the operation switches. And outputs a signal for switching the operation of the signal reproducing device 1 incorporated in the main body of the audio equipment in accordance with the display signal 43 and the display device 43 based on the display data transmitted from the first control circuit 5.
And a second control circuit for displaying a song number, etc., provided with an input / output terminal 44 connected to the control plug terminal 32, a power supply terminal 45 connected to the power plug terminal 33, and a reset terminal 46. I have. A reset circuit 47 operates for a predetermined time when power is supplied to the power plug terminal 33. The reset circuit 47 applies a reset signal to a reset terminal 46 provided in the second control circuit 42 to perform the second control. The circuit 42 is configured to perform a reset operation.

Reference numeral 48 is connected between the power plug terminal 33 and the ground plug terminal 31 and includes the booster circuit 1.
2 is a capacitor that is charged when the voltage output to the output terminal 13 is applied to the power plug terminal 33. When the headphone plug 28 is disconnected from the headphone jack 22 , the second control circuit 42 and the display It has the function of supplying power to keep the device 43 in the operating state for a predetermined time. Reference numeral 49 denotes a resistor connected between the output terminal 13 of the booster circuit 12 and the input / output terminal 7 of the first control circuit 5. The output and input operations of the signal by the input / output terminal 7 are not performed. At this time, the input / output terminal 7 has the function of holding the input / output terminal 7 at the H level.

In such a circuit configuration, the signal reproducing device 1
Is in the reproducing operation state, the number of the music being reproduced based on the signal recorded on the disc is changed to the first control circuit 5.
And display data based on the music number is output to the input / output terminal 7. And such display data is the second
When the display data is input to the input / output terminal 44 of the control circuit 42 and the display data is correctly received by the second control circuit 42, the song number based on the display data is displayed on the display device 43 and the second control A reception completion signal is output to the input / output terminal 44 of the circuit 42. As such a reception completion signal,
For example, the output level of the input / output terminal 44 is set to a first predetermined time L
A signal of (low) level is used.

The output operation of the display data from the first control circuit 5 to the second control circuit 42 is performed every time the number of the music to be reproduced changes, and the second control circuit 4
When the reception completion signal output from the display data 2 is not input to the input / output terminal 7 after transmission of the display data, the display data is repeatedly transmitted a predetermined number of times. When the reception completion signal is not input even if the display data is repeatedly transmitted a predetermined number of times from the first control circuit 5, the transmission operation of the display data is stopped. Further, when the transmission operation of the display data from the first control circuit 5 is stopped for a predetermined time after the reception completion signal is not received, the first control circuit 5 disconnects the headphone plug 28 from the headphone jack 22. The signal reproducing device 1 in the reproducing operation state is switched to the stop state, and the output signal of the power control signal output terminal 8 is inverted from the H level to the L level.

After the power supply voltage supplied to the second control circuit 42 and the display device 43 decreases and the second control circuit 42 and the display device 43 change to an inactive state, the headphone plug 28 is connected to the headphone jack 22 . When power is supplied to the remote control unit by the insertion, the reset circuit 47 is activated, and a reset signal is applied to the reset terminal 46 of the second control circuit 46. When the reset signal is input, the second control circuit 42 is reset. When the reset operation ends, a reset completion signal is output to the input / output terminal 44 of the second control circuit 42. As such a reset completion signal, for example, the output level of the input / output terminal 44 is set to a second level longer than the first predetermined time of the above-described reception completion signal.
A signal indicating that the signal is set to the L level for a predetermined time is used.

The reset completion signal output to the input / output terminal 44 of the second control circuit 42 is
When input to the input / output terminal 7 of the first control circuit 5, the display data is immediately output to the output terminal 7 of the first control circuit 5.

The present invention is configured as described above, and the operation will be described next. When the headphone plug 28 shown in FIG. 2 is inserted into the headphone jack 22 , the first signal plug terminal 29, the second signal plug terminal 30, the ground plug terminal 31, the control plug terminal 32, and the power plug terminal 3
3 come into contact with the first signal terminal 23, the second signal terminal 24, the ground terminal 25, the control terminal 26, and the power supply terminal 27, respectively.

In this state, when a power switch (not shown) provided on the audio equipment main body is closed, the power from the battery 11 is supplied to the booster circuit 12, so that the voltage of the output terminal 13 is increased. A voltage is output. The power output to the output terminal 13 of the booster circuit 12 is supplied to the power supply terminal 6 of the first control circuit 5 and is supplied to the second control circuit 42 via the power supply terminal 27 and the power supply plug terminal 33.
Is supplied to the power supply terminal 45. The reset signal output from the reset circuit 47 is applied to the reset terminal 46 of the second control circuit 42, and the reset operation of the second control circuit 42 is performed.

When the signal reproducing device is in a stopped state, a power control signal output terminal 8 provided in the first control circuit 5
, The L-level signal is output, so that the first control transistor 15 and the second control transistor 19 whose bases are connected to the power control signal output terminal 8 are in a non-conductive state. Therefore, the first control transistor 1
The first power supply transistor 14 and the second power supply transistor 18, which are connected to be controlled by the fifth control transistor 19 and the second control transistor 19, are in a non-conductive state, and the signal reproducing device 1 and the first amplifier circuit 9 And the second
Power is not supplied to the amplifier circuit 10.

When the reproduction operation switch 38 provided on the remote control operation unit is pressed and closed in the above-mentioned stopped state, the reproduction encoded in the input / output terminal 44 provided in the second control circuit 42 is performed. Is output. The switching signal for reproduction output to the input / output terminal 44 is supplied to the first terminal through the control plug terminal 32 and the control terminal 26.
The signal is input to an input / output terminal 7 provided in the control circuit 5. When a coded reproduction switching signal output from the second control circuit 42 is input to the input / output terminal 7, an H level signal is output to the power control signal output terminal 8 and a signal based on the code is output. A switching signal for putting the reproducing apparatus 1 into the reproducing operation state is output from the first control circuit 5.

When an H-level signal is output to the power control signal output terminal 8, the first control transistor 15 and the second control transistor 19 are biased and inverted to a conductive state. The second power supply transistor 18 is inverted to the conductive state. When the first power supply transistor 14 is turned on, the voltage output to the output terminal 13 of the booster circuit 12 is supplied to the power supply terminal 4 of the signal reproducing apparatus 1 through the emitter and the collector. Further, when the second power supply transistor 18 is inverted to a conductive state, a voltage from the battery 11 is supplied as an operating power supply for the first amplifier circuit 9 and the second amplifier circuit 10 between the emitter and the collector.

When power is supplied to the signal reproducing apparatus 1, the signal reproducing apparatus 1 becomes operable.
The switching signal output from the control circuit 5 causes the disc player constituting the signal reproducing apparatus 1 to enter a reproducing operation state. When the disc player enters the reproducing operation state, the left and right channel signals reproduced from the disc are output to the first output terminal 2 and the second output terminal 3 provided in the signal reproducing device 1.

The left channel signal output to the first output terminal 2 is input to the first amplifier circuit 9 and amplified, and then the first signal is transmitted through the first signal terminal 23 and the first signal plug terminal 29 to the first signal terminal. Applied to the variable resistor 34. Therefore, the signal of the left channel is applied to the left channel speaker 35 for sound emission, and the volume thereof is controlled by the first variable resistor 3.
4 is performed by sliding the slider. Also,
The right channel signal output to the second output terminal 3 is input to the second amplifier circuit 10 and amplified,
The second signal via the signal terminal 24 and the second signal plug terminal 30
Applied to the variable resistor 36. Therefore, the signal of the right channel is applied to the right channel speaker 37 to emit sound, and the sound volume is controlled by sliding the slider of the second variable resistor 36.

When the playback operation switch 38 provided on the remote controller is pressed and closed, the signal playback device 1 enters the playback operation state as described above, and the playback signal played back from the disc is listened to by the headphones. However, the data relating to the music number obtained from the disc in the reproducing operation state is input to the first control circuit 5. Such data is output to the input / output terminal 7 provided in the first control circuit 5 as display data.

The display data output to the input / output terminal 7 of the first control circuit 5 is input to the input / output terminal 44 of the second control circuit 42 via the control terminal 26 and the control plug terminal 32. When such display data is input to the input / output terminal 44, the signal detection operation is performed by the second control circuit 42. If the display data is correct data, the music based on the display data is performed. The number is displayed on the display device 43 and the input / output terminal 44 receives the reception completion signal L
A level signal is output for a first predetermined time. When such a reception completion signal is output, an L level reception completion signal is input to the input / output terminal 7 of the first control circuit 5.

When such a reception completion signal is input to the input / output terminal 7 of the first control circuit 5, the first control circuit 5 normally performs the operation of transmitting display data to the second control circuit 42. Therefore, the display data is not sent again. When such a reproducing operation is performed and the music reproduced from the disc ends, the reproducing operation of the next music starts.
When the reproduction operation of the next music starts, the data related to the music number obtained from the disc is changed, and display data based on the data is output to the input / output terminal 7 of the first control circuit 5. Such display data is the second data as described above.
The data is input to the input / output terminal 44 of the control circuit 42. If such data is correct data, the display device 43 displays the newly reproduced song number, and the input / output terminal 44 displays the reception completion signal. Is output and the above-described operation is performed.

[0031] While operation is performed when the above as sending and receiving operation of the display data is successful, then the second control circuit 42 by a discharge current of the headphone plug 28 is short i.e. condenser 48 the operating state A case will be described in which the headphone jack 22 is unplugged while it can be held.

When the output operation of the display data is not performed by the first control circuit 5 while the headphone plug 28 is disconnected from the headphone jack 22 , that is, when the music reproduced from the disk is not changed. The normal operation described above is continuously performed.

Next, a description will be given of a case where the display data is output from the first control circuit 5 while the headphone plug 28 is disconnected from the headphone jack 22 , that is, a case where the music reproduced from the disk is changed. I do.
When the music reproduced from the disc is changed while the headphone plug 28 is disconnected from the headphone jack 22 , display data is output to the input / output terminal 7 of the first control circuit 5. In such a state, since the reception completion signal is not input from the headphone jack 22, the display data is repeatedly output to the input / output terminal 7 of the first control circuit 5 at a predetermined interval. Therefore, when the headphone plug 28 is inserted into the headphone jack 22 in such a state, the second control circuit 42 provided in the remote control operation unit is in the operating state, and the display output from the first control circuit 5 is displayed. The song number is displayed on the display device 43 based on the application data, and a reception completion signal is output to the first control circuit 5. As a result of performing such an operation, the operation of repeatedly outputting display data of the first control circuit 5 is not performed, and a state is reached in which a normal reproduction operation is performed.

As described above, the operation is performed when the headphone plug 28 is disconnected from the headphone jack 22 for a short time, but the second control circuit 42 keeps the operation state for a long time, that is, the discharge current of the capacitor 48. The operation in the case where there is no time to perform the operation will be described.

When the signal reproducing apparatus 1 is in the reproducing operation state, the headphone plug 28 is connected to the headphone jack 22.
, The power output to the output terminal 13 of the booster circuit 12 is supplied to the remote controller as described above. When the power supply operation is performed, the charging operation of the capacitor 48 is performed, and the second control circuit 42 and the display device 43 are operated.
Is supplied with operating power.

Further, as a result of the reset circuit 47 being activated to apply a reset signal to the reset terminal 46 of the second control circuit 42, the second control circuit 42 is reset. When the reset operation of the second control circuit 42 is performed, an L-level signal as a reset completion signal is output to the input / output terminal 44 for a second predetermined time. When such a signal is input to the input / output terminal 7 of the first control circuit 5, the first control circuit 5
Determines that the reset completion signal has been input from the length of the L level time. When the first control circuit 5 detects that the reset operation of the second control circuit 42 has been performed, display data is immediately output to the input / output terminal 7. Since such display data is input to the input / output terminal 44 of the second control circuit 42, the song number is displayed on the display device 43 based on the display data, and the reception completion signal is output to the first control circuit 5 , And the normal operation described above is performed thereafter.

When the signal reproducing device 1 is in the reproducing operation state, the headphone plug 28 is connected to the headphone jack 22.
Is performed as described above. Next, the operation when the headphone plug 28 is unplugged longer will be described. In such a case, not only is the reception completion signal not input to the input / output terminal 7 of the first control circuit 5 but also the reset completion signal is not input despite the transmission of the display data. Therefore, if such a state continues for a predetermined time, the first control circuit 5 determines that the headphone plug 28 has been disconnected from the headphone jack 22 . as a result,
A signal for switching to the stop state is output from the first control circuit 5 to the signal reproducing device 1, and the output signal of the power control signal output terminal 8 is inverted to L level.

When a switching signal for stopping is output from the first control circuit 5, the signal reproducing device 1 is switched to a stopped state. When the output signal of the power control signal output terminal 8 becomes L level, the first control transistor 15 and the second
Since the control transistor 19 is inverted to the non-conductive state,
The first power supply transistor 14 and the second power supply transistor 18 are inverted to a non-conductive state.
As a result, the power supply to the signal reproducing device 1, the first amplifier circuit 9, and the second amplifier circuit 10 is cut off, and the audio equipment main body returns to the original stopped state. As described above, when the headphone plug 28 is disconnected from the headphone jack 22 for a long time during the reproducing operation, the signal reproducing device 1 is switched to the stop state, so that not only the useless operation is not performed but also the waste of the capacity of the battery 11 is prevented. can do.

As described above, the switching operation to the reproduction operation state,
The music number display operation by the display device 43 and the operation when the headphone plug 28 is pulled out from the headphone jack 22 are performed, but when the fast-forward operation switch 40 and the fast-return operation switch 41 are pressed and closed, the second control circuit 42 is pressed. Since a coded switching signal is output to the first control circuit 5 to perform a switching operation to each operation state, a description thereof will be omitted. When the stop operation switch 39 is pressed and closed while the signal reproducing device 1 is in each operation state, a coded switching signal is output from the second control circuit 42 to the first control circuit 5. When a switching signal for such a stop is input to the first control circuit 5, the first control circuit 5
Since the signal reproducing device 1 is switched to the stop state by the operation of the control circuit 5 and the output signal of the power control signal output terminal 8 becomes L level, the signal reproducing device 1, the first amplifier circuit 9 and the second amplifier circuit 10 Power supply is cut off.

Although the present embodiment has been described with reference to an audio device using a headphone with a remote control provided with a remote control unit in a headphone, the present invention can be applied to an audio device using an independent remote control unit.

[0041]

The remote control device of the present invention
When power is supplied to the remote controller, a second control circuit provided to control the operation of the display device is reset by the function of the reset circuit, and when the second control circuit is reset, the second control circuit is reset. In addition to the configuration in which the first control circuit provided in the audio device body is configured to output a reset completion signal indicating that the reset operation has been performed, the first control circuit receives the reset completion signal. At this time, since the first control circuit is configured to output the display data, when the plug is inserted into the jack, the second control circuit outputs the second data.
After the reset operation of the control circuit is performed, the output operation of the display data from the first control circuit to the second control circuit is quickly performed. Therefore, the user can quickly recognize and confirm necessary display data because the information signal obtained from the signal reproducing device and the signal indicating the operation state are displayed on the display device.

Further, according to the present invention, when a plug is inserted into a jack, a capacitor which is charged by a current supplied from the audio equipment main body is provided in the remote control unit, and when the plug is pulled out of the jack, the capacitor is discharged. Since the second control circuit and the display device provided in the remote control unit are maintained in the operating state for a predetermined time by the current, if the plug is inserted into the jack within the predetermined time, the contents displayed on the display device are displayed. Is maintained as it is, the display operation of the music number and the like can be performed normally. Therefore, when the audio device is in the operating state, no problem occurs if the plug is accidentally pulled out of the jack for a short time, and the present invention is very effective in increasing the commercial value of the audio device. Is big.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram incorporated in an audio equipment main body constituting the present invention.

FIG. 2 is an electric circuit diagram showing a connection relation of headphones with a remote controller.

[Explanation of symbols]

Reference Signs List 1 signal reproducing device 5 first control circuit 11 battery 22 headphone jack 23 first signal terminal 24 second signal terminal 25 ground terminal 26 control terminal 27 power supply terminal 28 headphone plug 29 first signal plug terminal 30 second signal plug terminal 31 ground Plug terminal 32 Control plug terminal 33 Power plug terminal 42 Second control circuit 43 Display device 47 Reset circuit 48 Capacitor

Claims (2)

(57) [Claims] 1. A plug provided on a remote control unit is inserted into a jack provided on a main body of an audio equipment, and an operation switch provided on the remote control unit is operated to be incorporated into the main body of the audio equipment. An audio device configured to control the operation of the signal reproducing device, the remote controller being incorporated in the audio device main body, controlling the operation of the signal reproducing device, and controlling the operation of the signal reproducing device based on a signal obtained from the signal reproducing device. A first control circuit for transmitting display data to the unit, and when a plug is inserted into the jack while being incorporated in the remote control unit, operating power is supplied from a power supply incorporated in the audio equipment body, and A second control circuit for transmitting a switching signal accompanying the switching operation of the operation switch to the first control circuit; A display device for displaying display data output from the first control circuit by the control operation of the second control circuit; and the jack and plug in the remote control unit
Power become more and reset circuit for resetting the Rutotomoni the second control circuit at a predetermined time operating state when supplied through the reset operation of the second control circuit by the reset circuit with a power supply start to the remote control unit When the reset is completed, the second control circuit sends a reset completion signal to the first control circuit. When the reset completion signal is received by the first control circuit, the first control circuit sends the reset completion signal to the second control circuit. A remote control device for audio equipment, wherein display data is transmitted to the remote controller. 2. A plug provided in a remote control unit is inserted into a jack provided in the audio device main body, and an operation switch provided in the remote control unit is operated to be incorporated in the audio device main body. In an audio device configured to control the operation of the signal reproducing device,
A first device that is incorporated in the audio equipment main body, controls the operation of the signal reproducing device, and sends display data to the remote controller based on a signal obtained from the signal reproducing device.
When the control circuit is incorporated in the remote control unit and the plug is inserted into the jack, the operation power is supplied from the power supply incorporated in the audio equipment main body, and a switching signal accompanying a switching operation of an operation switch is transmitted. A second control circuit for sending to the first control circuit, a display device incorporated in the remote control unit and displaying display data output from the first control circuit by a control operation of the second control circuit; A capacitor provided in the remote control unit and charged by a current supplied from the audio equipment main body when a plug is inserted into the jack, and the plug is disconnected from the jack when the signal reproducing device is in an operating state. the discharge current of the capacitor when the
Supply as operating power to the second control circuit and the display device
And, remote control device of the acoustic equipment is characterized in that so as to hold the second control circuit and a display device for a predetermined time operating state I or more.