JPS6216455B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder equipped with two tape running mechanisms, and an object of the present invention is to provide a tape recorder having two tape running mechanisms, and an object of the present invention is to provide a tape recorder having two tape running mechanisms. An object of the present invention is to provide a tape recorder capable of recording data using a traveling mechanism.

Generally, in a tape recorder equipped with two tape running mechanisms, a playback signal from the first tape running mechanism is added to the second tape running mechanism for recording. However, in most of the above-mentioned tape recorders, even when the first tape running mechanism on the playback side stops, the second tape running mechanism on the recording side continues to be in the recording state. I had to stop it manually.
If the second tape drive mechanism does not have an auto-stop mechanism that automatically stops the tape at the end, the recording state will continue, and the motor will continue to rotate even if the tape drive itself stops. In particular, when the power source is a battery, there is a problem of unnecessary consumption. Furthermore, if the second tape running mechanism on the recording side is not stopped even though the first tape running mechanism on the playback side has stopped, only the tape is running without being recorded in the second tape running mechanism. Therefore, it is necessary to find the recording start position again, which poses a problem that makes tape editing extremely difficult.

The present invention eliminates such conventional drawbacks, and the present invention will be described below with reference to drawings of embodiments.

The drawing shows an embodiment of the tape recorder of the present invention, and in the drawing, 1 is a first tape running mechanism, 2 is a second tape running mechanism, 3 is a playback circuit, 4 is a playback head, and 5 is a recording unit. The circuit 6 is a recording head. The first tape running mechanism 1 includes switches S ₁ and S ₂ that are turned on and off in conjunction with the operation of a playback button (not shown), and a motor that rotationally drives a capstan and a reel (not shown).
M ₁ and a drive circuit 7 for this motor M ₁ .
The drive circuit 7 of the motor _M1 includes a transistor _Q1 inserted on the ground side of the motor _M1 ,
The emitter is connected to the base of this transistor Q ₁ , and the collector and base are connected to resistors R ₁ and R ₂
The transistor _Q2 is connected to the power supply side of the motor _M1 through the switch S1, and is connected to the power supply +B through the switch _S1 . The reproducing circuit 3 is supplied with power +B via switches S ₁ and S ₂ . On the other hand, the tape running mechanism 2 includes a switch _S3 , which is turned on and off in conjunction with the operation of a record button and a playback button (not shown).
S ₄ , a motor M ₂ that rotationally drives a capstan and a reel (not shown), a drive circuit 8 for this motor M ₂ , and a control circuit 9 that controls the operation of this drive circuit 8. The drive circuit 8 for the motor _M2 includes a transistor _Q6 inserted into the ground side of the motor _M2 , an emitter connected to the base of the transistor _Q6 , and a collector and base connected via resistors _R6 and _R5 . The transistor _Q5 is connected to the power supply side of the motor _M2 , and is connected to the power supply +B via a switch _S3 . The recording circuit 5 is connected to the power supply + via switches S ₃ and S ₄ .
B is now being supplied. The control circuit 9 is composed of a transistor Q 4 inserted between the base and ground of the transistor Q ₅ constituting the drive circuit ₈ , and a transistor Q ₃ inserted between the base and emitter of the transistor Q ₄ . The base-collector connection point of the transistors Q ₃ and Q ₄ is connected to the power supply side of the motor M ₂ via a resistor R ₄ , and the base of the transistor Q ₃ is connected to the first tape via a resistor R ₃ . It is connected to the power supply side of the drive circuit 7 that constitutes the traveling mechanism 1.

In a tape recorder with such a configuration, when the playback button is operated and the switches S ₁ and S ₂ are turned on, a resistor is connected to the base of the transistor Q ₂ that constitutes the drive circuit 7.
Bias is applied through R ₂ , so transistor Q ₂ turns on, and when this transistor Q ₂ turns on, bias is applied to the base of transistor Q ₁ through resistor R ₁ , so transistor Q ₁
is turned on, the motor _M1 is driven, and the first tape running mechanism 1 enters a playback state in which the tape is run at a constant speed. At this time, the reproducing circuit 3 is in operation as power is supplied through the switch S ₂ , and the signal detected by the reproducing head 4 is amplified and supplied to the second tape transport mechanism 2 . Next, when the playback button and the record button are operated to turn on the switches S ₃ and S ₄ , bias is applied to the base of the transistor Q ₅ that constitutes the drive circuit 8 through the resistor R ₅ , so the transistor Q ₅ is turned on. , when this transistor _Q5 is turned on, a bias is applied to the base of the transistor _Q6 through the resistor _R6 , so the transistor _Q6 is turned on, the motor _M2 is driven, and the second tape transport mechanism 1 moves the tape at a constant speed. It will be in a recording state where it will be running. Since the recording circuit 5 is in operation with power supplied through the switch _S4 , the reproduction signal from the first tape transport mechanism 1 can be recorded through the recording head 6. In this way, the first tape running mechanism 1
The playback signal from the second tape running mechanism 2
When the first tape running mechanism 1 releases the lock state of the playback button and enters the stop mode by operating a stop button (not shown) while recording is in progress, the switch is activated in response to the return operation of the playback button.
S ₁ and S ₂ are turned off, and since no bias is applied to the bases of transistors Q ₁ and Q ₂ , transistors Q ₁ and Q ₂ are turned off, and motor M ₁ stops rotating. Therefore, the reproduction signal from the first tape transport mechanism 1 is no longer supplied to the second tape transport mechanism 2. At this time, power is no longer supplied through the resistor R ₃ to the base of the transistor Q ₃ that constitutes the control circuit 9 of the motor drive circuit 8 that constitutes the second tape running mechanism 2.
Transistor Q ₃ is turned off, and when transistor Q ₃ is turned off, a bias is applied to the base of transistor Q ₄ through resistor R ₄ , so transistor Q ₄ is turned on. Then,
The base bias of the transistor _Q5 constituting the motor drive circuit 8 is pulled to ground potential due to the transistor _Q4 , and the transistor _Q5 is turned off.
When this transistor _Q5 turns off, the resistance
Bias is no longer applied to the base of transistor Q ₆ through R ₆ and transistor Q ₆ is turned off. Therefore, the driving power no longer flows to the motor _M2 , the rotation of the motor _M2 is stopped, and the second tape transport mechanism 2 is stopped. In this stopped state of the second tape running mechanism 2, the recording button of the second tape running mechanism 2 remains in the locked state, and this stopped state is temporary. Next, when the playback button of the first tape running mechanism 1 is operated again and the switches S ₁ and S ₂ are turned on, the first tape running mechanism 1 returns to the playback mode. At this time, power is supplied through the resistor _R3 to the base of the transistor _Q3 that constitutes the control circuit 9 of the motor drive circuit 8 that constitutes the second tape running mechanism 2, so that the transistor _Q3 is turned on. ₃ turns on, the base of transistor Q ₄ is pulled to the ground potential, so transistor Q ₄ turns off. Therefore, the transistor constituting the motor drive circuit 8
Q ₅ and Q ₆ are each turned on, and the drive current starts flowing through the motor M ₂ , so that the motor M ₂ starts rotating again. In this way, the second tape running mechanism 2 is released from the paused state and enters the recording mode again, so that the playback signal from the first tape running mechanism 1 can be recorded.

In the above embodiment, the operation of the motor drive circuit 8 of the second tape transport mechanism 2 is controlled by the control circuit 9 whose operation is controlled by the stop operation of the first tape transport mechanism 1. However, the control circuit 8 is a plunger that drives a release mechanism that releases the lock state of the playback button and the record button of the second tape drive mechanism 2, or the lock state of the playback button and the record button of the second tape drive mechanism 2. The release mechanism for releasing the lock may be used to control the operation of the activation plunger of the lock release mechanism that is driven using the rotational force of the motor. In this case, it goes without saying that the second tape running mechanism 2 will be in a stopped state with the playback and recording buttons unlocked.

As described above, according to the present invention, when the first tape running mechanism on the playback side is stopped, the second tape running mechanism on the recording side is also stopped. The operation of recording the playback signal using the second tape running mechanism and editing the tape becomes very simple, and when editing the tape, the second tape running mechanism is in a non-recording state. Since the tape is not run, there is no need for troublesome operations such as relocating the recording start position on the tape.

[Brief explanation of the drawing]

The drawing is a circuit diagram showing an embodiment of the tape recorder of the present invention. 1, 2... Tape running mechanism, 7, 8...
Motor drive circuit, 9...control circuit, _S1 to _S4 ...switch.

Claims (1)

[Claims] 1 comprises first and second tape running mechanisms, and includes a control circuit that is operated in response to a stop operation of the first tape running mechanism;
The tape running mechanism of the first tape running mechanism is set to a playback mode, the second tape running mechanism is set to a recording mode, and the playback signal from the first tape running mechanism is being recorded by the second tape running mechanism. A tape recorder characterized in that when the second tape running mechanism is stopped, the second tape running mechanism is stopped synchronously by the control circuit.