JPH11234791A - Electronic device with speaker changeover switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker changeover electronic device where connection of built-in speakers is disconnected depending on the kind of a microphone connecting to the device. SOLUTION: The speaker changeover electronic device consists of a main body 1 with a built-in speaker and a microphone section 2 with a built-in speaker that connects to the main body 1. First resistors R3 with different resistance to indicate the presence of the built-in speaker are provided to the microphone section 2. When the microphone section 2 connects to the main body 1, the main body 1 detects the presence of the 1st resistors R3 to discriminate the speaker built-in microphone section 2 and the main body 1 inactivates the operation of a speaker 105 built in itself.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to electronic equipment,
In particular, the present invention relates to a speaker-switching electronic device in which a speaker built-in microphone unit is connected to a speaker built-in main body and one of the speakers is selectively operated.

[0002]

2. Description of the Related Art In a wireless communication device, a speaker and a microphone are essential functions for performing voice communication.
Usually, both a speaker and a microphone are often mounted on a wireless device main body. On the other hand, a configuration in which a speaker and a microphone are externally used is often used in terms of reducing the weight and size of the wireless device body. For example, a radio transceiver with a built-in speaker in the microphone unit and no speaker in the radio unit, or a radio device with a speaker in the radio unit and a speaker in the microphone unit have become widespread. . Since it is necessary to restrict sound output to one speaker, if there are two or more speakers, only one of the speakers must be operated.

FIG. 3 shows an example of the configuration of the former one of the above wireless devices. FIGS. 4 and 5 show examples of the latter wireless device.

In the radio shown in FIG. 3, a radio signal received by an antenna ANT is subjected to reception demodulation processing by a reception high frequency demodulation circuit 11 and amplified by an amplifier 12, and then to a speaker terminal S.
The sound is output from the speaker 21 of the microphone unit 2 with a built-in speaker through P. On the other hand, microphone 2
The sound input from 2 is amplified by the amplifier 14 of the main unit 1 through the microphone terminal MIC, is subjected to transmission modulation by the transmission modulation circuit 13, and is transmitted from the antenna ANT.

[0005] In such a wireless device, since no speaker is mounted on the main body 1 side, only the speaker built in the microphone operates when the microphone is connected, so that no problem occurs.

However, in the latter radio, two speakers are connected, so that only one of the speakers must be controlled to operate. In this case, in a conventional wireless device for selectively operating only one speaker in this case, as shown in FIG. 4, when a plug 23 built in the microphone unit 2 is inserted into the main body 1, the main body responds to the insertion. 1 employs a mechanical switch for controlling the opening and closing of the contact of a switch 16 built in the device 1 to disconnect the connection to the speaker 15 built in the main body.

[0007] Further, in the wireless device having the configuration shown in FIG. 5, an electronic switch 17 is provided on the main body 1 side, and when the microphone section 2 is connected, the electronic switch or the mechanical switch 17 is operated to perform manual operation. To disconnect the connection to the built-in speaker 15 to the amplifier 18 side.

[0008]

As described above, in the conventional wireless device, when connecting a microphone with a built-in speaker, as shown in FIG. A configuration in which the internal body switch is turned ON / OFF by inserting and removing the main body 23 and a configuration in which the internal body switch 17 is manually turned ON / OFF as shown in FIG. 5 are employed.

However, a wireless device using a mechanical switch that responds to plug insertion / removal as shown in FIG. 4 does not pose a problem when the wiring of the speaker microphone is small, but a switch for remote control is provided in the microphone section. In many cases, the number of wirings is increased, and in this case, it is difficult to cope.

[0010] Further, in the radio device shown in FIG. 5, manual operation is required every time the microphone unit is used.
There is a problem that it is complicated. Such a problem occurs not only in a wireless device but also in an electronic device having a similar microphone unit.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a speaker-switching electronic device capable of disconnecting a built-in speaker according to the type of a connected microphone unit.

Another object of the present invention is to provide a speaker-switchable electronic device capable of determining the operation of a remote control switch of a connected microphone unit.

[0013]

In order to solve the above-mentioned problems, a speaker switching electronic device according to the present invention employs the following characteristic configuration.

(1) A speaker-switching electronic device in which a speaker-containing microphone section is connected to a speaker-containing body to selectively operate any one of the speakers, a first one for indicating a built-in speaker having a different resistance value. When the microphone section is connected to the main body, the presence of the first resistor is detected, the microphone section is determined to be the speaker built-in microphone section, and the built-in speaker operation of the main body is turned off. Characteristic switchable electronic equipment.

(2) At least one second resistor for indicating a remote control switch operation is provided in the microphone unit, and when the presence of the second resistor is detected, the corresponding remote control switch operation is identified (1). ) Speaker-switchable electronic device.

(3) The microphone unit is provided with a display for displaying operation, and a resistor corresponding to a display having a resistance value different from the second resistance is provided. (1) The speaker-switchable electronic device that detects the presence of a speaker.

(4) The electronic device of (1) to (3), wherein each of the resistance values is determined by detecting a divided voltage based on a voltage supplied from the main body.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram showing an example of application of a speaker switching electronic device according to an embodiment of the present invention to a wireless device.

In FIG. 1, a radio reception signal received by an antenna ANT is transmitted to a reception high-frequency demodulation circuit 10 in a main body 1.
1. The high-frequency reception demodulation processing is performed by the microcomputer 1
Terminal 102a of speaker switching circuit 102 controlled by 0
Alternatively, the signal is output to the amplifier 103 for the built-in speaker 105 or the amplifier 104 for the speaker 201 of the microphone unit 2 via the interface 102b.

On the other hand, the microphone 2 of the microphone section 2
02 is input to the amplifier 11 in the main unit 1.
After being amplified by 1, the signal is modulated by the transmission modulation circuit 112 and transmitted from the antenna ANT.

The power source 106 of the main body 1 is connected to an external power source B.
In response to the ATT, the power supply VL is supplied to an LED provided in the microphone unit 2 and turned on to display the connection state and the operation state of the microphone unit 2, and the power supply VC to the microcomputer 107 is supplied.

The microcomputer 107 has a BUS corresponding to the presence or absence of a reception signal from the reception high-frequency demodulation circuit 101.
Upon receiving the Y signal, the control signal is output to the base of the transistor constituting the switch 110 to turn on the LED when the signal is received. When the switch 110 is turned on, the LED is turned on because the power supply VL is supplied to the LED via the resistor R9.

In this embodiment, the microphone section 2 is provided with a REM terminal and an LED terminal.

One REM terminal has three switches S
A remote switch 203 connected in series with resistors R4 and R5 having different resistance values is connected to the switches SW1 and SW2 so that data corresponding to W1 to SW3 can be transmitted. A different resistor may be connected to the switch SW3, but is not connected in this example. Since the pull-up resistor is connected to the main body 1 side, the divided voltage differs depending on the pressed switch. By detecting the divided voltage, the pressed switch can be identified.

The remote switch 203 is also connected with a resistor R3 for judging whether or not a speaker is provided. The resistor R3 divides the voltage of the REM terminal when the switch is not turned on and changes the voltage when the switch is turned off. Judgment resistance R3
, That is, whether or not the microphone unit with speaker 2 is connected.

Similarly to the REM terminal, the LED terminal is connected in series with the switches SW4 and SW5 to a resistor R7 having a different resistance value so that one switch can transmit data corresponding to three switches SW4 to SW6. The remote switch 204 to which R8 is connected is connected. A different resistor may be connected to the switch SW6, but is not connected in this example. Since the pull-up resistor is connected to the main body 1 side, the divided voltage differs depending on the pressed switch. By detecting the divided voltage, the pressed switch can be identified.

A resistor R6 for the same purpose as that of the remote switch 203 is connected to the remote switch 204, and is used to detect the connection state.

In FIG. 1, a power supply VC is supplied to a REM terminal via a resistor R1. The voltage of the REM terminal is converted into a digital voltage by an A / D converter 108 and supplied to a microcomputer 107. Is done. Also, L
The power supply VC is also supplied to the ED terminal via the resistor R2. The voltage of the LED terminal is converted into a digital voltage by the A / D converter 109 and supplied to the microcomputer 107.

The microcomputer 107 monitors the voltages of the remote control terminal, the REM terminal, and the LED terminal, and determines the type of the microphone (microphone with built-in speaker or BU) connected to the main body 1 by the following operation.
SY display LED built-in microphone).

More specifically, the microcomputer 1
07 is connected to the REM terminal or the LED terminal according to the state of the resistor R3, the resistor R4, the resistor R5, or no resistor, or the resistor R6, the resistor R7, the resistor R8, or no resistor, depending on the voltage of the REM terminal or the LED terminal. Since the divided voltage appearing is different, the frame 230, ie, the microphone with a built-in speaker or the frame 240, ie, LE
The ON operation state of the switches SW1 to SW3 or the switches SW4 to SW6 can be determined based on whether the microphone has the D built-in microphone. FIG. 2 shows an example of determination based on the detected REM terminal or LED terminal voltage. In FIG. 2, the reference voltages Va, Vb, Vc, and Vd are values that divide the space between the ground GND of the VC output from the power supply 106 determined based on the resistors R3 to R8 into six.

In the above-described embodiment of the present invention, the determination as shown in FIG. 2 is performed according to the divided voltage by each resistor. (1) When the voltage of the REM terminal or LED terminal is between VC and Va, the switch is turned off.
/ Microphone is not connected (R3 or R6 is not detected). That is, the microphone is not connected or the microphone without the resistor R3 or R6 is connected, and the switches SW1 and SW2 or the switches SW4 to SW4 to
SW6 is determined to be OFF. (2) When it is between Va and Vb, the switch is turned off
/ Microphone connected (R3 or R6 detected)
Is determined. (3) When it is between Vb and Vc, it is determined that the switch SW1 is ON or the switch SW4 is ON. (4) If it is between Vc and Vd, it is determined that switch SW2 is ON or SW5 is ON. (5) When it is between Vd and GND, switch SW3
Is ON or SW6 is ON.

Each of the above-described determination processes is executed at predetermined time intervals, and the type of the connected microphone is identified.

In the case of the above (2), it is determined that the microphone with an external speaker is connected, and the speaker switching circuit 102 is controlled to turn on the terminal 102a,
b is turned off.

In the above description of the embodiment, the pull-up and pull-down of the detection circuit may be reversed, and the switches may be of a switching type having neither ON mode. In the above description, switching is performed by inserting a switch on the input side using two amplifiers. However, if a switch is inserted on the output side of the amplifier, the current of the switch increases,
Only one switch is required.

[0035]

As described above, according to the electronic apparatus of the present invention, the type of the connected microphone can be easily determined only by connecting the microphone to the main body. Therefore, parts such as a switch for switching between the built-in speaker and the like are not required, and a special operation is not necessary. Therefore, a special effect in terms of economy and operability can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an example in which a speaker switching electronic device according to an embodiment of the present invention is applied to a wireless device.

FIG. 2 is a diagram illustrating an example of determination based on a detected REM terminal or LED terminal voltage in the embodiment.

FIG. 3 is a configuration diagram illustrating an example of a conventional wireless device.

FIG. 4 is a configuration diagram illustrating another example of a conventional wireless device.

FIG. 5 is a composition diagram showing still another example of the conventional wireless device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reception high-frequency demodulation circuit 2 microphone section 11, 101 reception high-frequency demodulation circuit 12, 14, 18, 103, 104, 111 amplifier 13, 112 transmission modulation circuit 15, 21, 105, 201 speaker 16 switch 17 mechanical switch 22, 202 Microphone 102 Speaker switching circuit 106 Power supply circuit 107 Microcomputer 108, 109 A / D converter 110 Switch 203, 204 Remote switch

Claims (4)

[Claims] 1. A speaker-switching electronic device in which a speaker-containing microphone section is connected to a speaker-containing body to selectively operate any one of the speakers, a first speaker-indicating electronic device having different resistance values. When the microphone section is connected to the main body, the presence of the first resistor is detected, the microphone section is determined to be a microphone section with a built-in speaker, and the operation of the built-in speaker is turned off. Speaker-switching electronic device. 2. The microphone unit according to claim 1, wherein at least one second resistor for indicating a remote control switch operation is provided in said microphone unit, and when the presence of said second resistor is detected, the corresponding remote control switch operation is identified. A speaker switching electronic device according to claim 1. 3. The microphone unit is provided with a display for displaying an operation, and a resistor corresponding to a display having a resistance value different from the second resistance is provided. The speaker-switchable electronic device according to claim 1, wherein the electronic device detects presence. 4. The speaker-switching electronic device according to claim 1, wherein the determination of each resistance value is performed by detecting a divided voltage based on a voltage supplied from the main body.