JPH0219542B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder having two cassette mechanisms, a first and a second cassette mechanism, and when one mechanism is in a playback or recording state, the other mechanism is kept in a standby state. And, following playback or recording by one mechanism, playback or recording by the other mechanism is automatically possible, and furthermore, while one mechanism is operating, the other mechanism can be fast-forwarded or rewinded. The purpose is to provide a tape recorder.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The tape recorder of the present invention will be described below with reference to drawings of one embodiment. FIG. 1 is a schematic diagram of an embodiment of the tape recorder of the present invention,
A and B indicate the first and second cassette mechanisms, respectively. One end of the motor _M1 constituting the first mechanism A is grounded and the other end is the control terminal 3.
It is connected to the output terminal 2 of a switch circuit 4 having a switch circuit 4. The input terminal 1 of the switch circuit 4 is connected to the first
It is connected to the power supply Vcc through a switch _S11 that is turned on when the recording/playback, fast forward, or rewind buttons of mechanism A are pressed. On the other hand, one end of the motor _M2 constituting the second mechanism B is grounded, and the other end is a switch _S21 that is turned on when the recording/playback, fast forward, or rewind buttons of the second mechanism are pressed.
Connected directly to the power supply Vcc via. The control terminal 3 of the switch circuit 4 is connected to the other end of the motor _M2 of the second mechanism B via a switch _S12 that turns off when the fast forward or rewind button of the first mechanism A is pressed. ing.

The switch circuit 4 is configured to be turned off when a predetermined voltage is applied to the control terminal 3, and turned on in other states.

In the above embodiment, it is assumed that the second cassette mechanism B is now in playback operation via its playback button. In this case, switch _S21 is on and power supply voltage Vcc is applied to motor _M2 . In this state, when the playback button of the first cassette mechanism A is pressed, the switch _S11 is turned on, and the power supply voltage Vcc is applied to the input terminal 1 of the switch circuit 4. However, in this case the Switch S ₁₂
Since the switch circuit 4 is turned on and the power supply voltage Vcc is also applied to the control terminal 3, the switch circuit 4 is not turned on. Therefore, although the first mechanism A is mechanically in a regeneration state, no voltage is applied to the motor _M2 , and it is in a regeneration standby state. Next, it is assumed that the remaining amount of tape in the second cassette mechanism B becomes zero and the auto-stop operation is activated. In this case, since the switch _S21 is turned off, the voltage applied to the control terminal 3 of the switch circuit 4 also becomes zero, and the switch circuit 4 is turned on. Therefore, a voltage is applied to the motor _M1 of the first mechanism A, and the first cassette mechanism A starts the reproducing operation. Note that when the fast forward or rewind button of the first cassette mechanism A is pressed while the second cassette mechanism B is in playback operation, the switch _S12 is turned OFF, so the switch circuit 4 is immediately turned ON at that point. Therefore, a voltage is applied to the motor _M1 and the fast forwarding or rewinding operation is performed immediately.

As described above, according to the above embodiment, it is possible to perform continuous playback in which the playback operation of the first cassette mechanism A automatically starts when the playback operation of the second cassette mechanism B is completed. Even when mechanism B is playing, the first cassette mechanism A can independently perform rewinding and fast forwarding operations.

FIG. 2 shows another embodiment of the present invention in more detail. In this embodiment, not only continuous playback operation from the second cassette mechanism B to the first cassette mechanism A but also continuous playback operation from the second cassette mechanism B to the first cassette mechanism A is performed. In order to enable the connection operation from the cassette mechanism A to the second cassette mechanism B, switch circuits 4 and 8 having control terminals and switches S _{12 and 22} that turn off in conjunction with the fast forward and rewind buttons are installed, respectively. It is provided on the cassette mechanisms A and B. Furthermore, while the second cassette mechanism B is in the playback operation, the first cassette mechanism A performs fast-forwarding and rewinding operations, and when that operation is completed, the second cassette mechanism B further reliably performs the playback operation. switch for
S ₁₃ and switch S ₂₃ are provided. Switch S _13,23
is a switch that is turned off in conjunction with the operation of the fast forward/rewind buttons of the first and second mechanisms A and B, respectively, and the above-mentioned switch circuit S operates in the same way when the fast forward or rewind buttons are pressed. Switch S is always turned off earlier than switch S _{12, 22} , and when the fast forward/rewind button is returned to its original position (i.e. when the fast forward/rewind operation is completed), it is always slower than switch S _{12, 22} . Configured to turn on. Further, the switch circuits 4 and 8 include transistors Q ₁ to Q ₃ , Q ₄ to _{Q 6} and bias resistors R ₁ to
When control terminals _{3 and 7} are open or _grounded , transistors Q ₁ to Q ₃ and Q ₄ to _{Q 6} are turned on, respectively, and the switch is turned on. When current flows from the input terminals 1, 5 of the circuits 4, 8 to the output terminals 2, 6 and the power supply voltage Vcc is applied to the control terminals 3, 7, the transistor
Q ₁ to _{Q 3} and Q ₄ to _{Q 6} are both turned off, so that no current flows from input terminals 1 and 5 of switch circuits 4 and 8 to output terminals 2 and 6.

With this configuration, for example, while the first cassette mechanism A is playing a desired tape, the second cassette mechanism B can fast-forward or rewind another tape, and press the play button at the desired tape position. Then, after the tape in the first cassette mechanism A has finished playing, the tape in the second cassette mechanism B will automatically start playing.Similarly, after that, put another tape in the first cassette mechanism and press the play button. By doing so, when the tape reproduction of the second cassette mechanism B is completed, the reproduction of the tape of the first cassette mechanism A can be automatically started again.

In the embodiment shown in FIGS. 1 and 2, switches S12 _{and S22} are both turned off only when the fast forward and rewind buttons are pressed, but they can be turned off independently of the fast forward and rewind buttons. It is also possible to configure it so that it can be turned on and off manually. In this case, the first and second cassette mechanisms can be driven independently and simultaneously;
It is also possible to drive successively from the second to the first, and from the second to the first.

As is clear from the above embodiments, according to the present invention, not only can the first and second cassette mechanisms be automatically driven sequentially with a simple configuration, but also the high speed operation of the other mechanism can be performed even when one mechanism is in operation. Feed (fast forward, rewind) operations are possible, and the high speed feed operations can be performed independently. This is extremely advantageous in practice.

[Brief explanation of drawings]

FIG. 1 is a schematic electrical wiring diagram of one embodiment of the tape recorder of the present invention, and FIG. 2 is a more specific electrical wiring diagram of another embodiment. A, B...Cassette mechanism, _M1 , _M2 ...
Motor, 4, 8... switch circuit,
S _{11,12,12,22,13,23} ...Switch.

Claims (1)

[Scope of Claims] 1. A switch circuit having a control terminal is connected in series to a motor drive circuit of at least one of the two cassette mechanisms, the first and second, and a switch circuit having a control terminal is connected in series to the motor drive circuit of at least one of the two cassette mechanisms. A control signal corresponding to the motor driving state of the other mechanism is applied via a switch that turns off when the high-speed feed button is operated, and when the motor of the other mechanism stops, the above switch circuit operates immediately to turn off one mechanism. The tape recorder is configured such that the motor of one mechanism is rotationally driven, and when a high-speed feed button of one mechanism is operated while the motor of the other mechanism is rotating, the motor of one mechanism is also rotationally driven. 2. The tape recorder according to claim 1, further comprising a switch for manually forcibly turning on the switch circuit.