JPS5897107A - Switching device for acoustic equipment - Google Patents

Abstract

PURPOSE:To reproduce a tape with one touch immediately, after FM-recording, for example, by automatically switching an input selector circuit to a tape position, in interlocking with the operation switching a tape recorder into the reproducing state. CONSTITUTION:In closing a reproduction switch 12b of a tape recorder 2, a control circuit 11 is selected to the reproducing state, a plunger and a motor in a driving section 10 are driven with the output and the reproduction is performed. Simultaneously, a reproduction output terminal 11b is grounded and a light emitting diode 14 is illuminated for the display of the reproduction state. Further, a terminal 11a disconnected from ground, a transistor (TR)17 is turned on, and a tape terminal of a changeover circuit 7 is grounded via the TR17 while the switch 12b is closed. As a result, a flip-flop corresponding to the circuit 7 is inverted and a selector circuit 4 is switched to an input terminal 3c of a tape. As a result, reproducing signals can be outputted automatically by closing the reproduction switch only.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching device for audio equipment having a tape recorder, and is one in which an input selector circuit is automatically switched to the ten position when the tape recorder is switched to a playback state.

Conventionally, many audio devices have been used in which the playback signal from a cheese, record player, tape recorder, etc. is input to an amplifier (hereinafter commonly referred to as an amplifier), and the amplifier's selector circuit switches and reproduces the signal. In this case, in order to reproduce the tape, two switching operations must be performed: first, the tape recorder is switched to the playback state, and the amplifier's selector circuit is switched to the tape position. This method has the drawback that the switching operation is cumbersome, such as when you want to check the recording status by playing back immediately after recording an FM broadcast.

The present invention eliminates these conventional drawbacks and provides a switching device for audio equipment that automatically switches the amplifier's selector circuit to the tape position in conjunction with the operation of switching the tape recorder to the playback state. be.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is an amplifier, 2 is a tape recorder, and 3a to
3C is an input terminal into which playback signals from a tuner, record player, or tape recorder are input; 3d is an auxiliary input terminal;
4 is a selector circuit that electronically switches the input terminals 3a to 3d; 6 is a signal processing section that appropriately processes and amplifies the output of the selector circuit 4; 6 is a speaker; 7 is a switching circuit that switches and controls the selector circuit 3; 8a, 8b, 8c, and 8d are selector switches for manually instructing the switching of the tuner, record player, tape recorder, and auxiliary input; 9 is a backup power source for the switching circuit 7; 10a to 10d are pull-up resistors; 11 1171 is a control circuit that logic-controls the operation switching of tape recorder 2 such as recording, playback, stop, fast forward, rewind, etc. 1171 is a ground level when set to recording state, and is grounded at other times. The recording operation output terminal 11b becomes a disconnected state, and the playback operation output terminal 12a to 12e becomes the ground level when set to the playback state, and the playback operation output terminal becomes disconnected from the ground at other times. is for recording and playback.

Operation switches for manually instructing each operation of stop, fast forward, and rewind; 13 and 14 are light emitting diodes for recording and playback indicators; 15a to 15e are pull-up resistors; 16 is activated by the output of the control circuit 11. motor,
The driving section 17 including a plunger and the like is a transistor whose collector is connected to the tape selector switch 8c, whose emitter is connected to the playback switch 12b, and whose base is connected to the recording operation output terminal 11a of the control circuit 11.

The switching circuit 7 is composed of 70 multi-stage 7-lip switches, and when any of the selector switches 8a to 8d is closed, the corresponding flip-flop is inverted, an output appears at the corresponding output terminal, and the selector switch is turned on. It is configured to switch the circuit 3 to the corresponding input terminals 3a to 3d.

In the above configuration, during recording, one of the selector switches 88 to 8d is closed depending on the recording source. For example, when recording an FM broadcast from a tuner, the selector switch 8a of the tuner is closed. When the recording switch 12a and playback switch 12b of the tape recorder 2 are closed, the control circuit 11 is set to the recording state, and the plunger and motor of the drive section 16 are operated by the output thereof.

As a result, the FM broadcast signal output from the signal processing section 5 is inputted to the tape recorder 2 as a recording signal, and recording is performed. At this time, the recording operation output terminal 11a of the control circuit
Since the signal becomes the ground level, the transistor 17 is off, and the recording indicator light emitting diode 13 lights up to indicate the recording state. Note that since the playback operation output terminal 11b is at ground level only in the playback state, it is disconnected from the ground in the recording state with both the recording switch 12a and the playback switch 12b closed. The light emitting diode 14 does not light up.

Next, when playing, press the playback switch 1 on the tape recorder.
Close 2b. In this way, the control circuit 11 enters the regeneration state, and its output drives the plunger, motor, etc. in the drive section 16 to perform regeneration, and at the same time, the regeneration operation output terminal 11b of the control circuit 11 is grounded. level,
The light emitting diode 14 for the playback indicator lights up, and the 6
．． Displays that it is in playback status.

On the other hand, at this time, the recording operation output terminal 11a is disconnected from the ground, and the transistor 17 is turned on. For this reason, the tape terminal of the switching circuit 7 is grounded via the transistor 17 and the playback switch 12b during the period when the playback switch 12b is closed (actually a very short period of about 0.5 seconds). As a result, the corresponding flip-flop in the switching circuit 17 is inverted and the selector circuit 4 is switched to the tape input terminal 3c. Therefore, the playback signal from the tape recorder 2 is sent to the input terminal 3c, the selector circuit 4,
The signal is transmitted to the speaker 6 via the signal processing section 5.

In this way, during reproduction, simply by closing the reproduction switch 12b of the tape recorder 2, the selector circuit 4 can be automatically switched to the tape position and the reproduction signal of the tape recorder 2 can be output.

Incidentally, in the above embodiment, since the transistor 17 remains off when the power is turned off, the current from the backup power supply 9 of the switching circuit 7 flows into the control circuit 11 of the tape recorder 2.

There's nothing wrong with that.

Further, the amplifier 1 and tape recorder 2 shown in the drawings may be configured as separate devices or may be configured as one unit. It is also effective when remotely controlling the operation switches 12a to 1jd, etc.

As described above, the present invention is designed to automatically switch the input selector circuit to the tape position in conjunction with the operation of switching the tape recorder to the playback state.
When you want to check the recording status after recording an M broadcast, you can play the tape with a single touch, making it extremely easy to use.

[Brief explanation of the drawing]

The drawing is a circuit diagram of an embodiment of the present invention. 1...Amplifier, 2...Tape recorder, 3a-3d...Input terminal, 4...Selector circuit, 6...Signal processing Device, 6...
...Speaker, 7...Switching circuit, 8a to 8d.
... Selector switch, 9 ... Backup power supply, 11 ... Control circuit, 12a-12
c... Operation switch, 13, 14...
Light emitting diode for indicator, 16... Drive unit.

Claims (1)

[Claims] A selector circuit that switches signals from multiple program sources such as a tuner, a record player, and a tape recorder, a control circuit that switches and controls functions of the tape recorder such as recording and playback, and a selector circuit that switches signals from multiple program sources such as a tuner, record player, and tape recorder, and a control circuit that switches and controls functions of the tape recorder such as recording and playback. A switching device for audio equipment, comprising means for automatically switching a circuit to a tape position.