JPH0377593B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field The present invention relates to an automatic function switching device that can automatically switch functions in an audio device. The present invention relates to an automatic function switching device in which the function is switched in response to the press of the playback button to perform tape playback and to reject the record player to a rest state. (b) Background of the Conventional Sound devices are known in which source equipment such as a radio tuner, tape deck, record player, etc. is electrically connected to an amplifier. In such devices, the amplifier is provided with a function switch for switching the source, and when selecting a desired source, first switch the function switch to the position corresponding to the source, and then Two operations are required: operating the operation knob for the desired sauce, which has the drawback of making the operation complicated. Therefore, in order to avoid complicated operations, an automatic function switching device has recently been proposed that allows source selection by simply operating the desired source's control knob without operating the amplifier's function switch. and is offered to the market.
However, the automatic function switching device switches the function when the play button on the tape deck is pressed during the performance of the record.
Although the tape can be played back, the record player remains in the playing state, which has the disadvantage of continuing unnecessary playing. By the way, the audio equipment is provided with a tape monitor switch for listening and comparing the output signal of a source device other than the tape deck with the signal recorded on the tape by the tape deck or the signal to be recorded. When the tape monitor switch is switched to the tape monitor side, the output signal of the source device whose playback operation has started will not be input to the amplifier unless the tape deck is placed in a recording state or a recording standby state. Therefore, even if the function is automatically switched, the tape monitor switch has the disadvantage that the sound of the desired source device cannot be heard unless the tape monitor switch is manually switched correctly. (c) Summary of the Invention The present invention provides that when a predetermined source device equipped with a stop circuit or a reject circuit is operated and an operation is performed to start another source device, the source device that has performed the operation start operation is stopped. The point is to start the operation, use the operation start signal generated from the source device to stop or reject the source device that has been in operation, and to switch the tape monitor switch in response to the operation start signal. Features. (D) Embodiment The figure shows an embodiment of the present invention, in which 1 is a tape deck, 2 is a radio tuner, 3 is a CD (compact disc) player, and 4 is a record player. Further, 5 is a diode circuit for stopping other source devices when a certain source device (for example, tape deck 1) is activated, and 6 is a diode circuit for generating a control signal for switching the tape monitor switch 7. 8 is a control circuit for automatic function switching, gates 9, 10 and 1
1 is an IC (integrated circuit), 12 is an amplifier, and 1
3 is a speaker. Next, the operation will be explained. When the tape monitor switch 7 is on the source side as shown, the monitor switch control terminal 14 is at "L" and the monitor switch drive section 15 is in a non-energized state. Now, when the start button of the record player 4 is pressed, the record player 4 starts operating to play the record, and an operation start signal is generated from the circuit 16 in the record player 4 that responds to the operation of the start button. , terminal 1 of IC 8
7. The operation start signal is also used as a stop signal for the tape deck 1 and the CD player 3, and is applied to the stop circuit 19 of the tape deck 1 through the diode 18 and the reject circuit 21 of the CD player 3 through the diode 20. operation is stopped,
The CD player 3 is then rejected. On the other hand, the operation start signal applied to the terminal 17 of the IC 8 is applied to the flip-flop circuit 23 via the input circuit 22. Therefore, an "H" signal is generated at the terminal 25 via the output circuit 24, which is
The voltage is applied to the gate 9, and the gate 9 becomes conductive. Therefore, the signal picked up from the record applied from the signal output terminal 26 of the record player 4 to the terminal 27 of the IC 8 is led out to the output terminal 28 via the gate 9, and is output via the contact of the tape monitor switch 7. The signal is applied to the amplifier 12 and the sound is emitted from the speaker 13. At that time, since the monitor switch control terminal 14 is at "L", the first transistor 29 of the control circuit 6 is off, and the operation start signal of the record player 4 is transmitted to the second transistor through the diode 30 and resistor 31. Even if the voltage is applied to the base of the transistor 32, the second transistor 32 is not turned on, the "H" signal is not applied to the terminal 33 of the IC 8 , and the tape monitor switch 7 remains in the source side state shown in the figure. There is. Regarding the output signal from the record player 4, only one channel is shown to simplify the explanation. When the playback button of the tape deck 1 is pressed in order to play back the tape during the above-mentioned record playing, the tape deck 1 starts playing, and the circuit 34 in the tape deck 1 that responds to the operation of the playback button starts the playback operation. An operation start signal is generated. Therefore, since the "L" signal is applied to the bases of the third and fourth transistors 35 and 36 of the control circuit 6 , and the third transistor 35 is off, the emitter of the fourth transistor 36 is connected to the base of the fourth transistor 36. When the operation start signal is applied, the fourth
Transistor 36 turns on and diode 37
An "H" signal will be applied to the terminal 33 of the IC 8 through the terminal 33 of the IC 8. Therefore, the flip-flop circuit 38 is inverted, an "H" signal is generated at the terminal 14 via the output circuit 39, and the monitor switch drive section 1
5 is excited, and the contact of the tape monitor switch 7 is switched to the tape monitor side opposite to that shown. Incidentally, as the flip-flop circuits 23, 38, 40 and 41, set-reset type flip-flop circuits are used, and due to the action of the input circuit 22,
The other flip-flop circuits are configured so that when an "H" signal is applied to one of the terminals 17, 33, 42 and 43, the other flip-flop circuits are reset. At the same time, the tape deck 1 operation start signal is sent to the CD player 3 as a stop signal by the diode 44.
and is applied to the record player 4 via a diode 45. Therefore, the reject circuit 21 of the CD player 3 and the reject circuit 46 of the record player 4 are activated, and the record player 4 which is in the playing state is rejected and becomes the rest state. Therefore, the signal picked up from the tape obtained at the output terminal 47 of the tape deck 1 is applied to the amplifier via the contact of the tape monitor switch 7, and at the same time the record player is rejected. When listening to the radio using the radio tuner 2, when the band selection switch or station selection switch of the tuner 2 is operated, an operation start signal is generated from the circuit 48 that responds to the operation, and a signal is sent to the terminal 43 of the IC 8 . diode 49
The voltage is applied to the base of the second transistor 32 of the control circuit 6 via the voltage. At that time, if the contact of the tape motor switch 7 is on the source side as shown in the figure, the signal obtained at the terminal 14 of the IC 8 is "L", and since the first transistor 29 of the control circuit 6 is off, the second Transistor 32 is not turned on, and the contacts of tape monitor switch 7 remain in the state shown. Further, if the contact of the tape monitor switch 7 is on the tape monitor side opposite to that shown in the figure, the signal obtained at the terminal 14 of the IC 8 is "H", and the first transistor 29 of the control circuit 6 is turned on. Therefore, when the operation start signal is applied, the second transistor 32 is also turned on, an "H" signal is applied to the terminal 33 of the IC 8 , the terminal 14 becomes "L", and the drive section 15 is de-energized. state, and the contact of the tape monitor switch 7 is switched to the source side. Therefore, regardless of the state of the tape monitor switch 7, the gate 11 becomes conductive in response to the operation start signal applied to the terminal 43 of the IC 8 , and the radio tuner 2
The output signal is from the terminal 50 of the IC 8 to the gate 11,
The signal is applied to the speaker 13 via the tape monitor switch 7 and the amplifier 12, and the speaker 13 generates a sound corresponding to the radio signal. The operation start signal of the radio tuner 2 is applied as a stop signal to the tape deck 1 via the diode 51, to the CD player 3 via the diode 52, and to the record player 4 via the diode 53 as a stop signal, as in the case of other source devices. source equipment that is in operation is stopped or rejected. The operation of the CD player 3 is substantially the same as that of the record player 4, and the explanation will be omitted. (e) Effects As described above, the automatic function switching device according to the present invention stops the operation of another source device when the operation of another source device is started while a predetermined source device equipped with a stop circuit or a reject circuit is in operation. Since the operation start signal generated from the source device that performed the start operation is used to stop or reject the source device that has been in operation, unnecessary performance operations are prevented without requiring manual operation. Moreover, since the tape monitor switch is automatically switched in response to the operation start signal, the desired sound can be heard simply by starting the operation of the source equipment used, making it easy to operate and excellent. be.

[Brief explanation of drawings]

The figure is a circuit diagram showing one embodiment of the present invention. Explanation of main drawing numbers, 1... Tape deck, 4...
Record player, 5 ...Diode circuit, 6 ...
...Control circuit, 7...Tape monitor switch, 8
……I C.

Claims (1)

[Claims] 1 Tape deck, radio tuner, and CD that generate operation start signals in response to operation start operations.
Source equipment such as players and record players,
Each source device is provided with a stop circuit that changes the operating state to a stopped state when the operation start signal is applied, or a reject circuit that changes the operating state to a reject state, and a signal from the source device other than the tape deck is supplied. , a function changeover switch that selects one signal from among the supplied signals in response to the operation start signal;
A tape monitor switch that selects either the signal selected by the function changeover switch or the signal from the tape deck in response to the operation start signal, and an amplifier that amplifies the signal selected by the tape monitor switch. An operation start signal generated from the source device on which the start operation has been performed switches the function changeover switch and the tape monitor switch so that the signal from the source device is supplied to the amplifier, and the operation start operation is performed. The operation start signal is applied to the stop circuit or reject circuit provided in each source device other than the source device on which the operation start operation was performed in order to put the source device other than the source device in the stop state or reject state. An automatic function switching device characterized by: