JPH0329143A - Operation control circuit for tape recorder - Google Patents

Abstract

PURPOSE:To easily search the using start position or the like of a magnetic tape by switching a tape recorder to a stop state when the count value of a counter circuit goes zero by the traveling of a magnetic tape in a memory stop operating state. CONSTITUTION:Respective operations of the tape recorder are switched in accordance with the switching operation of switches 1 to 5, and when the count value of the counter circuit 12 goes zero by the traveling operation of the magnetic tape in the memory stop state, the tape recorder is switched to a stop state. If a memory operation switch 5 is depressed when the tape recorder is in a memory stop non-operating state, the count value of the counter circuit 12 goes zero, the tape recorder is turned to the memory stop operating state, and if the switch 5 is depressed when the tape recorder is in the memory stop operating state, the tape recorder is switched to the memory stop non-operating state. Thus, the magnetic tape using start position or the like can simply be searched by utilizing the counter.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Industrial Application Field The present invention relates to a counter circuit that performs up-count and down-count operations on the number of pulse signals obtained by rotation of a reel shaft in accordance with the running direction of a magnetic tape. Concerning a tape recorder loaded with (b) Conventional technology Recording is performed using a tape recorder, and the recorded contents are checked by rewinding the magnetic tape to the recording start position and then performing a playback operation. Rewinding the magnetic tape to the recording start position is done while looking at the scale on the counter, but if the recorded content is long, the rewinding time will be longer, so it is easy to rewind the recording start position by missing the scale etc. I couldn't find it. As a technique that improves this point, there is a method of using a switch that opens and closes when the counter shows a predetermined value, for example, zero.
There is one disclosed in Japanese Patent No. -30270.

<C> Problems to be Solved by the Invention The technology disclosed in the above-mentioned publication has a problem in that it is expensive because it uses a counter with a switch.
Furthermore, recently, tape recorders equipped with an electronic counter that counts the number of pulse signals obtained by rotation of a reel shaft have become popular. The present invention aims to provide an operation control circuit that can easily find the starting position of a magnetic tape by using such an electronic counter. (2) Means for Solving the Problems The operation control circuit of the present invention includes a memory operation switch that is pressed during a memory stop operation and a memory stop release operation, a playback operation switch, a fast forward operation switch,
Each operation of the tape recorder is switched in response to switching operations of the rewind operation switch 7, the stop operation switch, and the memory operation switch note, and when the memory is in the stopped state, a counter circuit is activated by the running operation of the magnetic tape. It consists of a control circuit that switches the tape recorder to a stopped state when the count value reaches zero. (*) Function The present invention, when the memory operation switch is pressed while the tape recorder is in the memory stop non-operating state, sets the count value of the counter circuit to zero and causes the tape recorder to enter the memory stop operating state, When the memory operation switch is pressed while the recorder is in the memory stop operating state, the tape recorder is switched to the memory stop operating state.

(f) Embodiment The illustrated circuit is an embodiment of the operation control circuit of the present invention. In the same figure, (1), (2), (3), and <4> are a playback operation switch, a fast-forward operation switch, and a rewind operation that are pressed and opened during playback, fast forward, rewind, and stop operations, respectively. It is a switch and a stop operation switch, and is configured to be opened when the pressing force is cut off. <5> is a memory operation switch that is pressed and closed during memory stop operation and memory stop release operation, (number 6) is the playback operation switch (1), fast forward operation switch (2>), and rewind operation. This is a control circuit that performs switching operations of the tape recorder based on signals input manually by opening the switch (3), the stop operation switch (4), and the memory operation switch (5). (7) is the control circuit that performs the switching operation of the tape recorder. When the switch (1) is pressed and closed, the control circuit (
This is a playback switching circuit that becomes operational upon application of the playback drive signal output from 6>, and has the function of placing the tape recorder in the playback operation state. (8> is a fast-forward switching circuit that becomes operational when a fast-forward drive signal output from the control circuit (6) is applied when the fast-forward operation switch (2) is pressed and closed; the tape recorder (9).
) is a rewind switching circuit which is activated when a rewind drive signal outputted from the control circuit (6) is applied when the rewind operation switch (3) is pressed open; It has the effect of putting the rewinding operation state. Also, when the tape recorder is in each operating state, when the stop operation switch (4>) is pressed and closed, each drive signal output from the control circuit (6>) disappears, and the tape recorder is switched to the stopped state. (10) is a pulse signal generation circuit that generates a pulse signal in response to the rotation of the reel shaft (11);
) is a counter circuit that receives and counts the number of pulse signals outputted from the pulse signal generating circuit (10), and is in a state of playback and fast forward operation when the magnetic tape is running in the forward direction. When the magnetic tape is running in the opposite direction, that is, when the magnetic tape is in the rewinding state, the up-counting action is performed, and the down-counting action is performed by the control circuit (6>). .Furthermore, the counter circuit (12) is connected to the memory river operation switch (5).
When switched to the memory stop operation state by pressing and opening , a reset signal output from the control circuit (6) is applied to the reset terminal (13>) and the count value is reset to zero. ( 14) is a zero detection circuit which is activated by a signal output from the control circuit (6) when the tape recorder is in the memory stop operation state, and when the count value of the counter circuit (12) becomes zero due to the running of the magnetic tape. When the output terminal (15
) is configured to output a detection signal. When a detection signal is output to the output terminal (15) of the zero detection circuit (14), each drive signal output from the control circuit (6) disappears, and the tape recorder is switched from each operating state to a stopped state. In addition, when the memory is in the memory stop operation state, the memory operation switch
When 5> is pressed and closed, the tape recorder is switched to the memory stop non-operating state, and the zero detection circuit (14> becomes inactive.) The control circuit (16) is activated when the tape recorder is in the memory stop operating state. 6) a light emitting diode light-emitting diode that is turned on by a drive signal outputted from the circuit; (17) a reset switch that performs the reset operation of the counter circuit (12) regardless of the memory stop operation; and <18> the counter circuit. This is a display that displays the value counted by (12).In this embodiment, the recording operation switch that is pressed and closed during the recording operation and the switching circuit for the recording operation are omitted. The operation control circuit of the present invention is configured, and the operation of the circuit will be explained next.When the memory operation switch (5) is not operated, that is, when the memory is stopped and inactive, the regeneration operation switch (1) is activated. 〉, when the fast forward operation switch (2〉) and the rewind operation switch (3〉) are pressed and closed, the control circuit (6〉) switches on the playback switching circuit (7>), the fast forwarding switching circuit (8), and the rewinding switching circuit (6). A drive signal is output to the circuit (9), and the tape recorder is switched to each operating state by the switching operation of each switching circuit.When in each operating state, a pulse signal is generated as the reel shaft (11) rotates. Circuit (10
A pulse signal is output from the counter circuit (l2).
is input.

The counter circuit (12) performs an up-count operation when in the playback operation state and fast-forward operation state, and performs a down-count operation when in the rewind operation state, depending on the signal output from the control circuit (6). The count value is displayed on the display (18). When the stop control switch (4) is pressed and opened when the tape recorder is in each of the operating states described above, each switching circuit (7), (8).The drive signal output to (9) disappears, and each switching circuit (7), (8)
, (9) becomes inactive, so the tape recorder is switched to a stopped state. In addition, if the reset switch (17) is pressed and closed, the counter circuit (12)
You can reset the count value to zero.

The operation when the memory operation switch (5) is not operated is in the memory stop non-operation state, and the operation is performed as described above.Next, the operation when the memory operation switch (5) is operated will be explained. The pressing and closing operation of the memory operation switch (5) can be performed in either the stopped state or the operating state. When the memory operation switch (5) is pressed and closed, the control circuit (
6) The reset signal output from the counter circuit <1
A signal is applied to the reset terminal (13) provided at the counter circuit (12) to reset the count value of the counter circuit (12) to zero. Also, the zero detection circuit (14) detects the signal output from the control circuit (6). When the tape recorder enters the operating state, the light emitting diode (16) is turned on to indicate that the tape recorder is in the memory stop operating state.

For example, when the playback operation is in progress, at the beginning of the song you want to listen to again, press the memory operation switch (
When the press-close operation of 5> is performed, the above-mentioned operation is performed and the tape recorder enters the state of performing the memory stop operation. On the other hand, the reproduction operation of the tape recorder is not affected in any way, and the reproduction operation of the songs recorded on the magnetic tape is performed one after another.

Further, while the reproducing operation is being performed, the counter circuit (12) performs an up-counting operation, and the count value displayed on the display (18) increases. After performing such a playback operation, in order to play the song that you want to listen to again, first press and open the stop operation switch (4>) to stop the tape recorder.Switching operation to the stop state After performing this, when the rewind operation switch (3) is pressed to open, the control circuit (6) outputs a rewind drive signal, and the rewind switching circuit (9) causes the tape recorder to rewind. In this way, the rewinding operation of the magnetic tape is performed, and when the magnetic tape is in the rewinding operation state, the knoll shaft (11)
A pulse signal outputted from the pulse signal generation circuit (10) in accordance with the rotation of the counter circuit (12) is inputted to the counter circuit (12). Since the counter circuit (12) is in the state of performing a down-count operation when in such a rewinding operation state, the count value of the counter circuit (12>) decreases. When a down-count operation is performed and the count value becomes zero, a detection operation is performed by the zero detection circuit (14), and a detection signal accompanying zero detection is output to its output terminal (15). When the detection signal is output to the output terminal <15> of the circuit (14>), the drive signal output from the control circuit (6) to the rewind switching circuit (9>) disappears, and the rewind switching circuit As a result of the circuit (9) becoming inoperative, the tape recorder is switched to the stopped state.When the tape recorder is switched to the stopped state in this way, the position of the magnetic tape is at the beginning of the song that you want to listen to again. In such a state, when the playback operation switch (1) is pressed and opened to put the tape recorder into the playback mode, the playback operation of the song you want to listen to will start.In this way, the song you want to listen to again will be played. When the memory operation switch (5) is pressed open to put the tape recorder in the memory stop operation state, the memory operation switch (5) can be easily moved to the pressed and closed position by rewinding after the playback operation. You can deepen it.

As described above, the rewind operation performs the operation to find the position where the memory operation switch (5) is pressed open, but then the fast forward operation searches the position where the memory operation switch (5) is pressed and closed. The operation for searching will be explained.Such an operation involves, for example, recording a signal to the middle of the magnetic tape using a recording operation, then rewinding the magnetic tape and checking the recorded signal, and then the recording operation is interrupted. This is done when restarting the recording operation from the position of the magnetic tape.In other words, if the stop operation is performed while in the recording operation state, the recording operation state is canceled and the tape recorder is switched to the stop state.In such a stop state, , When the memory shooting switch (5> is pressed and opened), the counter circuit (12) is activated as described above.
At the same time, the zero detection circuit (14
> is in a state where it performs a detection operation. In such a state, when the rewind operation switch (3) is pressed and closed, a drive signal is output from the control circuit (6) to the rewind switching circuit (9), and the rewind switching circuit (9) changes its function. When the tape recorder is in the rewind operation state, the pulse signal output from the pulse signal generation circuit (10) is input to the counter circuit (12) and counted. When in the operating state, the counter circuit (12) is in a state of performing a down-count operation, so the count value of the counter circuit (12) decreases.When in the rewinding state, a stop operation is performed. When the tape recorder is switched to the stopped state, and the playback operation switch (1) is pressed and opened from the stopped state, the playback switching circuit (7) is activated and the tape recorder is put into the playback operation state.As a result. , the reproduction operation of the signal recorded on the magnetic tape by the recording operation is started, and the counter circuit (12) is switched to the state of up-counting operation, and its count value increases. A reproducing operation is performed, but when the count value of the counter circuit (12) becomes zero, a detection operation is performed by the zero detection circuit (14), and a detection signal accompanying zero detection is output to its output terminal (15). When a detection signal is output to the output terminal <l5> of the zero detection circuit (14), the control circuit (6)
As a result, the drive signal that had been output to the reproduction switching circuit (7) disappears, and the reproduction switching circuit (7) becomes inoperable. As a result, the tape recorder 1 is switched to the out-of-service state. When the magnetic tape is switched to the stopped state, the position of the magnetic tape becomes the position where the recording operation was interrupted, so if the recording operation is performed in such a state, it is possible to continue recording the signal from the position where the recording operation was interrupted. The operation when playing back and listening to all the signals recorded on the magnetic tape is performed as described above, but when starting the recording operation from the recording interruption position after playing back and listening to a part of the recorded signal, the playback operation All you have to do is perform a fast forward operation.

That is, when the fast-forward operation switch <2> is pressed and closed after playing back and listening to a part of the recorded signal, a drive signal is output from the control circuit <<6> to the fast-forward switching circuit (8>), and the fast-forwarding is started. The tape recorder is switched to the fast-forward operating state by the operation of the switching circuit (8). When in the fast-forward operation state, the counter circuit (12) is in an up-count operation state, and its count value increases as the magnetic tape runs. In this way, the magnetic tape is fast-forwarded, and the counter circuit (12)
When the count value becomes zero, a detection operation is performed by the zero detection circuit <14>, and as a result, the tape recorder is switched to the stopped state by the operation described above. Therefore, if a recording operation is performed after such an operation, the signal can be continuously recorded on the magnetic tape Lf from the position where the recording operation was interrupted.

As described above, the operation is performed when the memory is in the stop operation state, but when in such a state, the light emitting diode
6> is in the lit state, and the user can recognize that the tape recorder is in the memory stop operation state by the lighting of the light emitting diode (16). Further, when the memory operation switch (5) is pressed and closed while in the memory stop operation state, the memory stop operation state is canceled and the tape recorder is returned to the memory stop operation state. That is, the control circuit (6)
Due to the action of , the zero detection circuit (14) becomes inactive and the light emitting diode (16) is turned off.

In this embodiment, the present invention can be easily constructed by constructing the control circuit (6>, counter circuit (12), zero detection circuit (l4), etc. by a microcomputer. Also, the counter circuit (12) The reset operation by the reset switch (17), which is provided to reset the count value of , can be prohibited when the tape recorder is in the memory stop operation state.

(G) Effects of the Invention The operation control circuit of the present invention makes the count value of the counter circuit zero at the time of the memory stop operation, and when the count value of the counter circuit becomes zero due to the running of the magnetic tape in the memory stop operation state, the operation control circuit of the present invention Since the recorder is switched to a stopped state, it is possible to easily find the starting position of the magnetic tape, which is very convenient.

In addition, since an electronic counter is used as a counter, the manufacturing price does not increase significantly with the addition of functions compared to the case of using a special counter with a switch such as a mechanical counter. The operation control circuit of the present invention has the great effect of increasing commercial value.

[Brief explanation of drawings]

The illustrated circuit is an embodiment of the operation control circuit of the present invention. Explanation of main drawing numbers (1)... Operation switch for playback, <2)... Operation switch for fast forwarding, (3)... Operation switch for rewinding, (0... Operation switch for stopping, (5)...Memory operation switch, (6>...Control circuit, (
10)...Pulse signal generation circuit, <12>...Counter circuit, (14)...Zero detection circuit.

Claims (1)

[Claims] (1) In a tape recorder equipped with a counter circuit that performs up-count and down-count operations in accordance with the running direction of the magnetic tape, the number of pulse signals obtained by the rotation of the reel shaft is operated during memory stop operation and memory stop release operation. Each operation of the tape recorder is controlled in response to the switching operations of the memory operation switch, the playback operation switch, the fast forward operation switch, the rewind operation switch, the stop operation switch, and the memory operation switch that are pressed at the same time. and a control circuit that switches the tape recorder to a stopped state when the count value of the counter circuit becomes zero due to running of the magnetic tape when the memory is in the memory stopped state, and when the tape recorder is in the memory stopped and inoperable state, the control circuit switches the tape recorder to the stopped state. When the operation switch is pressed, the count value of the counter circuit is set to zero and the tape recorder is placed in a memory stop operation state, and when the memory operation switch is pressed while the tape recorder is in the memory stop operation state. An operation control circuit for a tape recorder, characterized in that the tape recorder is switched to a memory-stopped, non-operational state.