JPS6017049Y2 - Tape recorder mode switching control device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mode switching control device for a tape recorder.
To provide a mode switching control device which allows easy mode switching operation by interlocking a switch for taking out a monitor signal during recording and taking out a reproduced signal during playback with a mode selection switch.

A conventional tape recorder in which a recording system circuit and a reproduction system circuit are each provided independently has a switch circuit and a mode selection manual switch that switch to take out a monitor signal during recording and a reproduction signal during playback, respectively. Since the switch circuit is configured to operate, the switching circuit and the manual mode selection switch must be operated separately when switching modes, which has the disadvantage of being troublesome to operate.

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings.

The figure shows a circuit diagram of an embodiment of a mode switching control device for a tape recorder according to the present invention.

In the figure, during recording, when the recording switch 1d of the mode selection manual switch 1 is closed, the voltage from the power supply 1 is applied to the mode selection circuit 2 via the switch 1d, and the output recording control signal is is a recording control circuit (not shown)
is supplied to put the tape recorder into recording mode.

On the other hand, the recording control signal from the mode selection circuit 2 is supplied to the differentiating circuit 4 via the OR circuit 3, and its output signal is supplied as a trigger signal to the set terminal of the flip-flop 5 to activate it.

The signal from flip-flop 5 is supplied to transistor Q, turning it on, activating relay 6, and
Contact (switch) Sl.

S2 is connected to the terminal side.

As a result, the audio signal from the input terminal 7 or the microphone input terminal 8 is transmitted to the variable resistor VR1, the amplifier 9, the switch S1,
The signal is taken out as a monitor signal from a power terminal 11 via a variable resistor (volume) VR2 and an amplifier 10, and is also supplied to a recording head 13 via amplifiers 9 and 12 to be recorded on a tape.

Further, by connecting the switch S2 to the terminal side, voltage from the power source 11 is applied to the light emitting diode 14, causing it to emit light, thereby indicating that it is on the monitor side.

When entering pause mode or switch mode in this state, when switch 1e or switch 1f is closed, the output control signal of mode selection circuit 2 is supplied to the pause control circuit or stop control circuit (both not shown), and the respective mode is switched. Make it.

On the other hand, the output control signal is supplied to the differentiating circuit 4 via the OR circuit 3, and the trigger signal is supplied to the set terminal of the flip-flop 5, but since the flip-flop 5 is in the set state at the time of recording mentioned above, Transistor Q remains in the on state, which causes switches S□,
S2 remains connected to terminal S2.

. During playback, when the reuse switch 1a is closed, a playback control signal is taken out from the mode selection circuit 2 and sent to the playback control circuit (
(not shown) to set the playback mode.

On the other hand, the reproduction control signal from the mode selection circuit 2 is output to the OR circuit 1.
5 to a differentiating circuit 16, and its output signal is supplied as a trigger signal to the reset terminal of the flip-flop 5 to reset it.

By resetting the flip-flop 5, the transistor Q is turned off, and the contacts S1. of the relay 6 are turned off. S2 is switched and connected to the terminal a side.

As a result, the reproduction signal from the reproduction head 17 is transmitted to the amplifier 1.
8, the signal is taken out from the output terminal 11 via the switch S1, the volume VR2, and the amplifier 10.

Further, by connecting the switch S2 to the terminal a side, a voltage from the power source of 10 V is applied to the light emitting diode 19, causing it to emit light, thereby indicating that it is on the tape side.

When fast forwarding or rewinding, switch 1b or 1c
When the circuit is closed, a control signal from the mode selection circuit 2 is supplied to each control circuit to set the respective mode in the same manner as above, and is also supplied to the reset terminal of the flip-flop 5 via the OR circuit 5 and the differentiator circuit 16. and switch S1. S
2 is connected to the terminal a side.

In this way, when the switch S1 is connected to the playback circuit side (terminal a) during fast forwarding or rewinding, it is convenient for monitoring and cueing.

Here, when the switch 1d is closed and the recording mode is in effect, if it is not desired to take out the monitor signal from the output terminal 11, the switch 20 is closed.

As a result, the voltage from the power source 11 is supplied to the OR circuit 15 to reset the flip-flop 5, and the switch S is connected to the terminal a side.

As a result, even if the tape recorder is in the recording mode, the monitor signal is not taken out from the output terminal 11.

Also, if you simply want to monitor the source signal, switch 2
1 is closed, the flip-flop 5 is set, the present invention S4 is connected to the terminal side, and the source signal is taken out from the output terminal 11.

Note that since the device of the present invention uses OR circuits 3 and 15, the switch S□ is the switch 1d corresponding to the recording system circuit.
1e and the switches 1a to 1c corresponding to the reproduction system circuits, the terminal side of the circuit system corresponding to the switch that is closed first is connected preferentially to the terminal side of the circuit system, and this state can be maintained.

However, if desired, switch 20 may be used as described above.
．． 21, the holding state of the switch S□ can be changed as appropriate.

As described above, the mode switching control device for a tape recorder according to the present invention includes a switch connected to selectively output a recording signal from a recording circuit and a reproduction signal from a reproduction circuit to an output terminal, and a plurality of modes. a mode selection circuit that extracts each control signal corresponding to the mode in order to obtain a mode, and a recording circuit that connects the above output terminal to the recording system circuit according to at least the recording mode control signal, and at least according to the playback, fast forwarding, and rewinding mode control signal. It consists of a switch drive circuit that switches and connects the above switch to connect the playback system circuit and the output terminal, so the switch that takes out the monitor signal during recording and the playback signal during playback corresponds to the selection of each mode. The tape recorder has the advantage of being easier and more reliable in switching modes than conventional tape recorders.

[Brief explanation of the drawing]

The figure is a circuit diagram of an embodiment of a mode switching control device for a tape recorder according to the present invention. 1...Mode selection manual switch, 1a...
...Playback switch, 1b...Fast forward switch, 1c...Rewind switch, 1d...
...Recording switch, 1e...Pause switch, 1f...Stop switch, 2...
...Mode selection circuit, 3,15...OR circuit,
4, 16... Differential circuit, 5... Flip-flop, 6... Relay, 7, 8...
・Input terminal, 11... Output terminal, 3... Recording head, 17... Playback head, S□...
·switch.

Claims (1)

[Scope of utility model registration request] In a mode switching control circuit for a tape recorder that switches and controls modes of a tape recorder in which a recording circuit and a reproduction circuit are provided independently, a recording signal of the recording circuit and a reproduction signal of the reproduction circuit are output. A switch connected to selectively take out the terminal, a mode selection circuit that takes out each control signal corresponding to the mode to obtain a plurality of modes such as recording, playback, fast forward, rewind, stop, etc.; The mode selection circuit connects the recording system circuit and the output terminal in accordance with at least a recording mode control signal, and connects the reproduction system circuit and the output terminal in accordance with at least a playback, fast forward, and rewind mode control signal. A tape recorder mode switching control device consisting of a switch drive circuit that switches and connects switches.