JPS60127551A - Operation control circuit of tape recorder - Google Patents

Abstract

PURPOSE:To make a continuous reproducing operation possible with simple constitution by releasing the temporary stop state of the other tape recorder in accordance with the switching operation of a switch which switches the reproducing state of one tape recorder to the stop state. CONSTITUTION:Switches 1 and 3 are closed when one and the other tape recorders are in the reproducing state respectively, and switches 1 and 3 are opened when they are in the stop state, and plungers 5 and 9 release the temporary stop state of one and the other tape recorders respectively by the suction operation. Plunger driving circuits 6 and 10 drive plungers 5 and 9, and a driving signal generating circuit 13 outputs a driving signal, which operates the circuit 10 for a prescribed time when the switch 1 is switched from the close state to the open state, and similarly, a driving signal generating circuit 16 outputs a driving signal to the circuit 6 when the switch 3 is switched. Stopping means 19 and 21 stop the applying operation of driving signals from circuits 16 and 13 to circuits 6 and 10 when switches 1 and 3 are in the open state respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a tape recorder, and particularly to a cutting control circuit for a tape recorder in which a first tape recorder and a second tape recorder are incorporated.

(B) Prior Art Recently, double tape recorders, in which two tape recorders are built into the same device, have become popular. Some of these double tape recorders include a dubbing operation in which the signal played by the first tape recorder is recorded in the second tape recorder, and when the playback operation of one tape recorder is completed, the playback operation of the other tape recorder is started. Some devices are configured to perform continuous playback operations. A method of continuous playback operation in which when the playback operation of one tape recorder is finished, the playback operation of the other tape recorder is started, was introduced in Japanese Patent Publication No. 54-256.
Generally, there is a method of controlling the rotational operation of an electric motor, as disclosed in Japanese Patent Publication No. 54-2566, and a method of mechanically canceling a temporary stop state, as disclosed in Japanese Patent Publication No. 54-2566. Further, such continuous playback operation is performed using an automatic stop device that detects when the magnetic tape reaches its end and switches the tape recorder from a playback operation state to a stop state.

(C) Object of the Invention The present invention provides an operation control circuit that can perform continuous reproduction operation with a simple configuration.

B) Structure of the Invention The present invention provides a tape recorder incorporating a first tape recorder and a second tape recorder each having a playback function, a pause function, and an automatic stop function. A first switch is opened when the tape recorder is in the active state and is in the stopped state, a second switch is closed when the second tape recorder is in the active state and is opened when the tape recorder is in the stopped state, and a second switch is opened when the second tape recorder is in the active state and is in the stopped state. 1
A first plunger for releasing the paused state of the tape recorder, a second plunger for releasing the paused state of the second tape recorder by a suction action, and a first plunger drive circuit provided to drive the first plunger. and when a second plunger drive circuit provided to drive the second plunger and the first switch are switched from the closed state to the open state, the second plunger
a first drive signal generation circuit that outputs a drive signal for operating the plunger drive circuit for a predetermined time; and a first drive signal generation circuit that operates the first plunger drive circuit for a predetermined time when the second switch is switched from a closed state to an open state. a second drive signal generation circuit that outputs a drive signal; and a first switch that blocks application of the drive signal from the second drive signal generation circuit to the first plunger drive circuit when the first switch is in an open state. and a second blocking means for blocking application of the drive signal from the first drive signal generation circuit to the second plunger drive circuit when the second switch is in an open state. .

(E) Embodiment The illustrated circuit is a simple embodiment of the operation control circuit of the present invention, and a switch for selecting whether or not to perform continuous reproduction operation is omitted. (1) is a first switch that is opened when the first tape recorder is in a playback state, a cut-off state, and a stop state;
It has a first terminal (1a) connected to a power source and a second terminal (1b) connected to ground. (3) is a second switch that is closed when the second tape recorder is in the playback state and opened when it is stopped, and the first terminal is connected to the power supply via the resistor (4). (3a
) and a second terminal (3b) which is grounded.

(5) C is a first plunger that releases the paused state of the first tape recorder by a suction operation; (2) is a first plunger drive circuit provided to drive the first plunger (5); One plunger (5) is composed of a drive transistor (7) connected as a load, a control transistor (8) connected to control the operation of the drive transistor (7), and the like. (9) is a second plunger that releases the paused state of the second tape recorder by suction operation;
a second provided to drive the plunger (9);
a plunger drive circuit, and the second plunger (9
) is connected as a load, and a control transistor (121, etc.) connected to control the operation of the drive transistor aυ.U is the first switch (1) of the first switch (1). Terminal (1
a) and the base of the control transistor α constituting the second plunger drive circuit, and when the first switch (1) is switched from the closed state to the open state, the control This is a first drive signal generation circuit that outputs a signal that makes the transistor 02 conductive for a predetermined period of time, and is composed of a capacitor α4) and a resistor αω.

(f) is connected between the first terminal (3a) of the second switch (3) and the base of the control transistor (8) constituting the first plunger drive circuit (5), and This is a second drive signal generation circuit that outputs a signal that makes the control transistor (8) conductive for a predetermined time when the second switch (3) is switched from the closed state to the open state, and includes a capacitor (17) and a resistor a to It is composed of Ql is a control transistor whose base is connected to the first terminal (1a) via a resistor (c20) and whose collector constitutes a first pusher drive circuit so as to be controlled by the opening/closing operation of the first switch (1). (8
) and whose emitter is grounded, the control transistor (8) for controlling the drive signal from the second drive signal generation circuit.
It has the function of controlling the application operation of the base.

01), the base is connected to the first terminal (3) via the resistor (24) in order to be controlled by the opening/closing operation of the second switch (3).
a control transistor Q21 connected to a) and whose collector constitutes the second Brazier drive circuit (to);
A second blocking transistor is connected to the base of the control transistor (120) and has an emitter grounded.
It has the function of controlling the application operation to the base. Although the operation control circuit of the present invention is configured as described above, each of the first and second tape recorders according to the present invention has an automatic stop device that automatically stops the tape recorder when the magnetic tape has traveled to the end. It is equipped with

The present invention is configured as described above, and next, continuous reproduction operation will be explained. First of all, data 2 from the first tape recorder.
Continuous playback operation to a tape recorder will be explained.

Such an operation is performed by placing the first tape recorder in a playback state and placing the second tape recorder in a paused state in the playback state. In such a state, both the first switch (]) and the second switch (3) are in a closed state, and therefore the first blocking transistor u9 and the second blocking transistor (1, 'IJ are both in a non-conducting state). be.

In addition, the first plunger drive circuit (the control transistor (8) constituting the phrase and the drive transistor (the force is in a non-conducting state) whose operation is controlled by the control transistor (8), and the second plunger drive circuit The control transistor (121) constituting the ribs and the control transistor (drive transistor θ1 whose operation is controlled by 121) are in a non-conductive state.

The reproduction operation of the first tape recorder is performed in this state, but when the magnetic tape reaches the end, the reproduction operation is canceled by the action of the automatic stop device and the first tape recorder is returned to the stopped state. When the first tape recorder is returned to the stopped state, the first switch (1), which was in the closed state, is opened. When the first switch (1) is opened, a charging current flows through the capacitor 04 that constitutes the first drive signal generation circuit 0, and the charging current flows through the resistor e to the second plunger drive circuit. A bias current flows to the base of the control transistor 02 for a predetermined time. As a result, the control transistor (12+) is reversed to a conductive state, and along with this reversal, the drive transistor 0υ is reversed to a conductive state for a predetermined period of time.When the drive transistor Ql+ is reversed to a conductive state, it is connected to its collector as a voltage The second plunger (9), which is
The suction operation of the second plunger (9) releases the second tape recorder from the paused state, and starts the reproduction operation of the second tape recorder. When the second tape recorder is performing the playback operation, the first switch (1) is open and the first blocking transistor (19) is in a conductive state. When the magnetic tape reaches the end, the automatic stop device cancels the playback operation and starts the second playback operation.
The tape recorder is returned to a stopped state. Second
When the tape recorder is returned to the stopped state, the second switch (3), which was in the open state, is opened. The second
When the switch (3) is opened, the second drive signal generation circuit (
A charging current flows through the capacitor 〇η constituting the first plunger drive circuit (layer 8), but in such a state, the first blocking transistor 4 is in a conductive state, so that the charging current flows through the control transistor 〇η constituting the first plunger drive circuit (layer 8). ), so that the control transistor (8) and the drive transistor (the force is not reversed into conduction) and the first plunger (5) connected as a load to the collector of the drive transistor (7). ) does not perform a suction operation.After the continuous reproduction operation from the first tape recorder to the second tape recorder is performed in this way, both the first tape recorder and the second tape recorder come to a stopped state.

As described above, the continuous playback operation from the first tape recorder to the second tape recorder is performed. Next, the continuous playback operation from the second tape recorder to the first tape recorder will be explained. This operation is performed by placing the second tape recorder in a playback state and placing the first tape recorder in a paused state in the playback state.

In such a state, the first switch (1) and the second switch (
3) are both in the closed state, therefore the first blocking transistor fi-yu and the second blocking transistor (2+)F
Both i are in a non-conducting state. The reproduction operation of the second tape recorder is carried out in this state, but when the magnetic tape has run to the end, the reproduction operation is canceled by the action of the automatic stop device and the second tape recorder is returned to the stopped state. When the second tape recorder is returned to the stopped state, the second switch (3), which was in the closed state, is opened. When the second switch (3) is opened, a charging current flows through the capacitor (1'O) constituting the second drive signal generating circuit (to), and the charging current flows through the resistor C24 to the first plunger. A bias magnetic current flows through the base of the control transistor (8) constituting the drive circuit for a predetermined period of time. As a result, the control transistor (8) is reversed to a conductive state, and along with the reversal operation, the drive transistor (force is The drive transistor (a first plunger (5) connected as a load to its collector when the force is reversed to a conductive state for a predetermined period of time)
is made to perform suction operation. As a result, the first tape recorder is released from the paused state by the suction operation of the first plunger (5), and the reproduction operation of the first tape recorder is started. When the first tape recorder is performing a reproduction operation, the second switch (3) is open and the second blocking transistor (21) is in a conductive state. The first tape recorder starts playing, and when the magnetic tape reaches its end, the automatic stop device cancels the playing and returns the first tape recorder to its stopped state. When the first tape recorder is returned to the stopped state, the first tape recorder, which was in the open state,
The switch (11 is opened. When the first switch (11 is opened, the capacitor 04 constituting the first drive signal generation circuit α) is charged with a current of t111, but in this state, the second blocking transistor c !1) is in a conductive state, the charging current VT does not flow to the base of the control transistor 02 constituting the second Pushinger drive circuit. Therefore, the control transistor Q and the drive transistor 00 are never turned on, and the second plunger (9), which is connected as a load to the collector of the drive transistor Q1, does not perform a suction operation. After the continuous playback operation from the second tape recorder to the first cheap recorder is performed in this way, both the first tape recorder and the second tape recorder are brought to a stopped state.

As described above, since the continuous playback operation from the first tape recorder to the second tape recorder and the continuous playback operation from the second tape recorder to the first tape recorder are performed, when one tape recorder is in the playback operation state, By repeating the operation of causing the other tape recorder to pause in the playback mode, it is possible to repeat the continuous playback operation. In addition, in this explanation, continuous playback was performed to the other tape recorder by switching to the stopped state by the automatic stop device when the magnetic tape ended, but it is not possible to switch the tape recorder to the stopped state by the stop operation. It goes without saying that continuous playback operation to the other tape recorder can also be performed by using the above method.

(F) Effects of the Invention The operation control circuit of the present invention has a plunger-like suction operation built into the other tape recorder by the opening/closing operation of a switch that is switched when one tape recorder is switched from the playback state to the stop state. The system is characterized in that the suspension state is canceled by the suction operation, and this has the advantage that the configuration is simpler compared to a method that mechanically releases the pause condition. have. Furthermore, when one tape recorder is in a stopped state, even if the other tape recorder is switched from a playback state to a stop state, the blocking means prevents the application of a drive signal to the plunger drive circuit. will not malfunction,
The present invention is most suitable as an operation control circuit for a tape recorder having a continuous playback function.

[Brief explanation of the drawing]

The illustrated circuit is one embodiment of the operation control circuit of the present invention. Explanation of main drawing numbers (1)...1st switch, (3)...2nd switch, (5)...1st pusher, (9...1st switch
Plunger drive circuit, (9)...Second plunger, (+01.,, Second plunger drive circuit, 0
...First drive signal generation circuit, (Panel...Second drive signal generation circuit, (1!1...First blocking transistor, (21)...Second blocking transistor.

Claims (1)

[Claims] (1) In a tape recorder incorporating a first tape recorder and a second tape recorder each having a playback function, a pause function, and an automatic stop function, the first tape recorder is in the playback state, the cutoff state is in the stop state, and the tape recorder is stopped. a first switch that is opened when the second tape recorder is in the playback state, a second switch that is closed when the second tape recorder is in the playback state, and a second switch that is opened when the second tape recorder is in the stop state; a first plunger for releasing a stopped state; a second pusher for releasing a second tape recorder from a paused state by a suction operation; a first pusher drive circuit provided to drive the first plunger; 2 plunger drive (
a second plunger drive circuit provided;
a first drive signal generation circuit that outputs a drive signal for operating the second plunger drive circuit for a predetermined period of time when the switch is switched from the closed state to the open state; a second drive signal generation circuit that outputs a drive signal to operate the first Pushinger drive circuit for a predetermined time when switched; and a drive signal from the second drive signal generation circuit when the first switch is in an open state. a first blocking means for blocking one operation of application to the first plunger drive circuit, and a drive signal from the first drive signal generation circuit to the @2 plunger drive circuit when the second switch is in an open state. an operation control circuit for a tape recorder, comprising a second blocking means for blocking an application operation of the tape recorder.