JP2567991Y2 - Remote control device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control (hereinafter simply referred to as "remote control") device such as a headphone stereo, and more particularly to a remote control device suitable for reducing the number of connection lines connecting a remote control device and a main body set. .

[0002]

2. Description of the Related Art Conventionally, many remote control devices provided in the middle of a headphone cord of an audio device, for example, a headphone stereo, etc., have been provided in a block diagram shown in FIG.
In the figure, 1 is a headphone, 3 is a display mounted on the remote controller 10, 4 is a microcomputer (hereinafter simply referred to as a microcomputer) built in the remote controller 10, 7 is a microcomputer built in the main body set, and 8 is a microcomputer built in the main body set. A / D conversion circuit, 10 is a remote control unit provided in the middle of the headphone cord, 11
Denotes a main body set of the audio equipment, 12 denotes a resistance attenuator constituted by a key switch or the like, and J1 to J12 denote input / output terminals of connection lines connecting the remote control unit 10 and the main body set 11.

For example, a headphone stereo body set 11
L / Rch stereo signal is supplied to the remote control unit 10 in the middle of the headphone cord via the input / output terminals J3 and J4, and the volume level is adjusted by the variable resistors VR1 and VR2 provided inside the remote control unit 10. The remote control unit 10 outputs to the headphones 1 via the input / output terminals J1 and J2 so that the user can listen to music and the like from the headphones 1.

On the other hand, the operation of the main body set 11 can be set by operating the resistance attenuator 12 provided in the remote control unit 10. The adjustment setting level of the resistance attenuator 12 is supplied to the A / D conversion circuit 8 of the main body set 11 via the input / output terminal J12, converted into a digital signal, and input to the microcomputer 7 of the main body set 11.

The microcomputer 7 operates the main body set 11 based on the set level data of the resistor attenuator 12, for example, the mode setting operation of the main body cassette mechanism (not shown) and the L / Rch stereo signal level adjuster (see FIG. (Not shown), and at the same time, the operation setting data of the main body set 11 is supplied to the microcomputer 4 of the remote control unit 10 through the input / output terminals J10 and J11. Based on the supplied operation setting data, the microcomputer 4 can control the display 3 to display the operation state of the main body set 11.

[0006] As described above, the headphone stereo body is set by the remote control unit 10 provided in the middle of the headphone cord.
11 remote control of the operating state and volume level.

[0007]

However, the conventional headphone stereo remote control device described above has a
Since a large number of connection lines are required between the remote control unit 10 and the stereo signal connection line, such as a data connection line for connecting the microcomputers 4 and 7 to each other and a setting level signal connection line for the resistor attenuator 12, the headphone cord is thick. However, it is difficult to use, and the cost of the wire for the headphone cord increases.

Further, input / output terminals for connecting a large number of connection lines are required, so that the space factor of the remote controller 10 is deteriorated and the weight of the remote controller 10 is increased.

The present invention has been made in view of the above points, and has as its object to provide a remote control device which eliminates the drawbacks of the conventional example and reduces the number of connection lines between the main body set and the remote control unit. There.

[0010]

The remote control device according to the present invention includes a resistor attenuator, a display, and a first control unit connected to a main body set via a connection line .
A / D conversion circuit is provided in the main body set.
The controls the operation state of the main body set by the resistor attenuator setting value input via the A / D converter circuit, said first control means to the second outputting operation state data of the main body set In a remote control device having a control means, an output of the second control means is provided.
A first resistor connected to the data line, the main body set
And the first control is provided to the remote control unit.
A switching circuit provided at the input of the means and this switch
Providing a second resistor connected to the input of the switching circuit;
Connection line for connecting a first resistor and the second resistor
A connection point between the first resistor and the second resistor;
The above-mentioned resistance attenuator provided between the ground and the above-mentioned connection
The A / D conversion circuit connected to a point, wherein the operation state of the switching circuit does not change at the minimum set voltage of the resistance attenuator, and the resistance attenuator is at least one resistor. And a key switch provided between the resistor and the ground, and the last resistor connected to the ground is a variable resistor.

[0011]

According to this invention, a remote control provided in the middle of a headphone cord of an audio device has a resistance attenuator composed of a key switch, a variable resistor, and the like. The digital signal is supplied to the conversion circuit and converted into a digital signal. The microcomputer of the main body set detects the set level of the resistor attenuator. The microcomputer sets the operation mode of the main unit set based on the detection data to control the operation state, or controls the volume level and the like, and operates the operation state of the main unit set via a resistor provided on the output data line of the main unit set. And setting data such as volume level to the remote controller.

The setting data of the main body set is supplied to a microcomputer built in the remote control unit via a switching circuit provided at the input of the remote control unit. The operating status of the set and the volume level can be displayed.

In other words, in the signal and data transfer between the main unit set and the remote control unit, the above-described resistance attenuator setting signal and the operation state data of the main unit set can be transferred by the common connection line. Can be reduced.

[0014]

FIG. 1 is a block diagram showing an embodiment of a remote control device provided in the middle of a headphone cord of an audio apparatus according to the present invention, for example, a headphone stereo. The same parts as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, reference numeral 2 denotes a remote control unit provided in the middle of a headphone cord, 5 denotes a resistance attenuator constituted by a key switch and a variable resistor, 6 denotes a headphone stereo body set, and Q1 denotes a switching provided at an input of the remote control unit 2. Circuit.

The resistance attenuator 5 of the remote controller 2 is shown in FIG.
It is composed of resistors R4 to R7, key switches S1 to S4, and a variable resistor VR, as described above.It is possible to set an arbitrary setting level by stepwise adjustment by the key switches S1 to S4 and continuous adjustment by the variable resistor VR. This resistance attenuator 5
The output signal of the set level (DC voltage signal described later) is converted into a digital signal by the A / D conversion circuit 8 of the main unit set 6 via the input / output terminal J5 and supplied to the microcomputer 7.

On the other hand, the microcomputer 7 of the main body set 6 controls the operation state of the main body set 6 and at the same time, the operation state of the main body set 6 is connected to the output terminal DATA-0 of the microcomputer 7 by a resistor.
Output via R3. That is, for example, when DATA-0 is at the H level, the DATA-0 terminal becomes almost the V _DD voltage of the microcomputer 7 and A
The input voltage of the / D conversion circuit 8 is a DC voltage value divided by the resistance value of the resistor R3 and the resistance attenuator 5 of the remote control unit 2, and the divided voltage is input through the A / D conversion circuit 8. The microcomputer 7 can determine the setting state of the resistance attenuator 5 of the remote controller 2.

The switching circuit Q1 of the remote controller 2
The resistor R2 provided at the input of the resistor A2 has a high resistance and does not affect the set voltage of the resistor attenuator 5, but the switching circuit Q1 is set to be turned ON even at the minimum set voltage of the resistor attenuator 5. ing. That is, when the output terminal DATA-0 of the microcomputer 7 is set to the H level, the switching circuit Q1 always operates ON, and the output data of the switching circuit Q1 is supplied to the microcomputer 4.

As described above, one connection line of the input / output terminal J5 transmits the set DC voltage signal of the resistance attenuator 5 from the remote controller 2 and at the same time, the DATA-0 of the microcomputer 7 which judges the operation state of the main body set 6. Output data is sent from the terminal to the microcomputer 4 via the switching circuit Q1 of the remote controller 2.

The microcomputer 4 is provided with the operation state data of the main body set 6.
The operation state can be displayed by controlling the display 3 in accordance with the input of the data. For example, when the cassette mode of the main body set 6 is set by operating the key switches S1 to S4 of the resistance attenuator 5, the set DC voltage level of the key switches S1 to S4 of the resistance attenuator 5 is changed via the A / D conversion circuit 8. The microcomputer 7 makes a judgment and controls the cassette mode changeover switch (not shown) of the main body set 6 to set the cassette mode. At the same time, the data of the cassette mode setting is sent to the remote controller 2 from the DATA-0 terminal of the microcomputer 7. Send out,
The microcomputer 4 of the remote controller 2 can display the cassette mode on the display 3.

When the set level changes by operating the variable resistor VR of the resistance attenuator 5 to change the volume level of the main body set, the set DC voltage level of the resistance attenuator 5 is changed to A / D in the same manner as described above. The microcomputer 7 makes a determination via the conversion circuit 8 and controls the volume level adjuster of the main body set 6.
Data to the remote controller 2, and the volume level value can be displayed on the display 3 of the remote controller 2.

As described above, the user listening to the headphone stereo can set the operating state of the main body set 6 by operating the resistance attenuator 5 of the remote controller 2 provided in the middle of the headphone cord. This operation state can be confirmed on the display 3 of the same remote control unit 2.

The A / D conversion circuit 8 of the main unit set 6 of the remote control device described above may be a window comparator for detecting the set level of the resistance attenuator 5, and the switching circuit Q1 of the remote control unit 2 is provided with the resistance attenuator 5 Alternatively, a comparator that operates with the minimum set DC voltage value may be used.

[0024]

[Effects of the Invention] As described above, according to the invention of the present application,
Remote control where the main unit set and the remote control unit are connected via a connection line
In the remote control device, there is an effect that signals and data transfer between the main body set and the remote controller can be transferred by one shared connection line.

As described above, since the number of connection lines of the remote control unit of the headphone stereo can be reduced, the cost of the headphone cord can be reduced, and the number of input / output terminals of the connection line can be reduced, so that the space for the remote control unit can be reduced. There is also an effect that the factor is improved.

Moreover, it can be composed of only a transistor and a resistor, and has excellent features such as a simple structure and easy implementation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a remote control device according to the present invention.

FIG. 2 is a block diagram showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Headphone 2 Remote control part (remote control part) provided in the middle of headphone cord 3 Indicator of remote control part 4 Microcomputer (microcomputer) built in remote control part 5 Resistance attenuator of remote control part 6 Body set of audio equipment 7 Built in body set Microcomputer (microcomputer) 8 A / D conversion circuit inside the main unit set Q1 Switching circuit provided for remote controller input

Claims (2)

(57) [Scope of request for utility model registration] A remote attenuator, a display, and a first control unit connected to the main body set via a connection line .
A / D conversion circuit is provided in the main body set.
The controls the operation state of the main body set by the resistor attenuator setting value input via the A / D converter circuit, said first control means to the second outputting operation state data of the main body set In a remote control device having a control means, a first control means connected to an output data line of the second control means is provided.
Of the remote control
A switch provided at the input of the first control means in the roll section
Connected to the input of this switching circuit
A second resistor is provided, and the first resistor and the second resistor are provided.
A connection line for connecting a resistor, the first resistor, and the
The resistor A provided between the connection point with the resistor 2 and the ground
Attenuator and the A / D converter connected to the connection point
Consists of a circuit, the remote control apparatus characterized by being configured such that the operation state of the switching circuit does not change at the minimum set voltage of the resistance attenuator. 2. The resistance attenuator includes at least one resistor and a key switch provided between the resistor and a ground, and the last resistor connected to the ground is a variable resistor. The remote control device according to claim 1, wherein