JPH0221062B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention includes a memory counter having a ring counter configuration as a tape counter, and a signal of a counter switch that switches according to the count value of the memory counter and a tape end signal. The present invention relates to a tape running control device that controls tape running based on a detection signal and performs an auto-stop operation and an auto-repeat operation.

[Conventional technology]

Conventionally, the electronic tape running control device of a tape recorder is equipped with a logic control circuit formed by combining gate circuits, flip-flop circuits, etc., and logic control circuits are controlled from each operation key such as playback, fast forward, rewind, and stop. Based on the operation signals input to the input terminals of each operation mode of the control circuit, the operation of the tape running motor and each plunger of the tape running drive mechanism is controlled to play, fast forward, rewind, stop running the tape, etc. control.

Further, this type of electronic tape running control device is disclosed in, for example, Japanese Patent Application Laid-Open No. 54-77109 (G11B15/
As described in 02), in order to perform automatic repeat play, etc., based on the tape end detection signal, the tape is automatically controlled to rewind mode to run in the opposite direction, and the tape counter is activated. Some devices have a function of automatically controlling the stop mode or playback mode and performing an auto-stop operation or an auto-repeat operation when the tape is rewound to a pre-specified position.

The tape counter is formed using a memory counter having a ring counter configuration called a bracket counter with a switch, for example, 3
When a digit memory counter is used, the counter counts down as the tape runs in the opposite direction due to rewinding, and the count value changes from "000" to "999". When the counter switch is turned on, the control circuit causes the tape running to stop or to play back.

On the other hand, Japanese Patent Application Laid-open No. 51-49705 (G11B15/18)
For example, when the count value of the tape counter (accumulating tachometer) reaches "000", the counter switch is turned on or off depending on the direction in which the tape is running at that time, and when the tape is running in the opposite direction. A plunger drive device is described for switching from a review operation to a stop operation or a playback operation, and for switching from a cue operation to a stop operation or a playback operation when the tape is running in the forward direction.

[Problem to be solved by the invention]

When using auto-stop and auto-repeat operations to locate the beginning of a song recorded on a tape, or perform automatic rewind playback, the auto-stop and auto-repeat operations allow you to select any position on the tape, regardless of the tape running direction. It is desirable to be able to auto-stop the tape, or to play the tape repeatedly from the start to the middle or from the middle to the end using auto-repeat.

However, the conventional tape running control device described in the above-mentioned Japanese Unexamined Patent Publication No. 54-77109, etc., operates in an operation mode based on the count value of the tape counter only in the rewinding mode in which the tape runs in the opposite direction. It is configured to perform auto-stop operation and auto-repeat operation by switching the
When the tape is in fast-forward mode or playback mode, in which the tape is running in the forward direction, the operation mode cannot be switched based on the count value of the tape counter. It is not possible to perform rewind or playback mode at any position on the tape during fast forwarding or forward playback, and it is also not possible to perform repeated playback by auto-repeat operation.

Furthermore, in the case of the plunger drive device described in the above-mentioned Japanese Patent Application Laid-Open No. 51-49705, the operation is switched only at the point where the count value of the tape counter becomes "000", for example, and the operation is switched at two points where the count value is different. Auto repeat operations that require switching cannot be performed.

The present invention is based on a simple switch,
Auto-stop operation and auto-repeat operation when running in both forward and reverse directions using only the tape end detection signal at the beginning and end of the tape, and when running in both forward and reverse directions using the tape end detection signal and counter switch signal. To provide a tape running control device that can freely perform auto-stop and auto-repeat operations, and can perform auto-stop at any position and repeated playback between the start or end and any position, regardless of the tape running direction. The purpose is to

[Means to solve the problem]

In order to achieve the above object, in the tape running control device of the present invention, operation signals of a plurality of operation keys are inputted to input terminals of each operation mode, and the tape running is controlled by inputting signals from each of the input terminals. a logic control circuit that controls the drive mechanism and the running of the tape; a memory counter having a ring counter configuration that counts in the up direction and down direction respectively as the tape runs in the forward and reverse directions; The counter switch that is on when the most significant digit of the count value is 9, the off change of the counter switch when the tape is running in the forward direction, and the on change of the above counter switch when the tape is running in the reverse direction, respectively. a signal generation circuit that outputs a control signal by a signal generator; a first operation changeover switch that outputs or cuts off the control signal according to the operation; a control circuit consisting of a tape end detection signal input terminal to which a tape end detection signal is input when the tape is running; a flip-flop that is set according to the operation signals of the respective operation keys and the detection signal; and a set of the control circuit. an AND gate that outputs the control signal via the first operation changeover switch only during the operation; and a pulse signal triggered by the control signal and the detection signal of the detection signal input terminal via the AND gate. a one-shot circuit for outputting an output signal; a delay reset circuit for delaying the control signal via the first operation changeover switch and resetting the flip-flop immediately after the triggering of the one-shot circuit; a second operation changeover switch that switches output between a stop terminal and a repeat terminal and supplies the output signal of the stop terminal to a stop mode input terminal of the control circuit; and a repeat control gate section that supplies an output signal to a playback mode input terminal of the control circuit, and supplies an output signal of the repeat terminal during forward travel to a rewind mode input terminal of the control circuit. Technical measures are being taken.

[Effect]

In the tape running control device configured as described above, when the first operation changeover switch is switched to cut off the control signal of the signal generation circuit, when the tape is running in the forward direction and When the tape runs in the reverse direction based on the operation of the rewind operation key, the one-shot circuit is triggered only by the tape end detection signal, and at this time, if the second operation selector switch is switched to the stop terminal, the one-shot circuit is activated. Since the auto-stop operation is performed by the output signal of the tape, auto-stop is performed at the end or beginning of the tape.

In addition, if the second operation selector switch is switched to the repeat terminal, the repeat control gate section controls the output signal of the one-shot circuit so that the tape reaches the end of the tape during playback in the forward direction and enters the rewind mode. At the same time, the tape reaches the beginning of the tape while traveling in the reverse direction and is then run in the forward direction in playback mode, so the auto-repeat operation switches the operation mode at the beginning and end of the tape and plays repeatedly. It will be done.

On the other hand, when the first operation selector switch is switched to output the control signal of the signal generation circuit, the one-shot circuit is triggered at the beginning and end of the tape based on the tape end detection signal described above, and
One shot circuit based on the change of the most significant digit of the count value from "9" to "0" when traveling in the forward direction and from "0" to "9" of the most significant digit of the count value when traveling in the reverse direction. is triggered, and at this time, if the second operation selector switch is switched to the stop terminal, the one-shot circuit output signal based on the change in the most significant digit of the count value during forward and reverse travel will be activated. The tape is auto-stopped at an arbitrary position by an auto-stop operation, regardless of the running direction of the tape.

In addition, if the second operation selector switch is switched to the repeat terminal, the trigger of the one-shot circuit based on the change in the most significant digit of the count value during forward and reverse running, and the starting end of the tape,
By triggering the one-shot circuit based on the tape end detection signal at the end, partial repeat playback is performed by auto-repeat operation between the start or end of the tape and a position determined by the count value.

Note that when the one-shot circuit is triggered by a change in the most significant digit of the count value, the control circuit is delayed and reset by the flip-flop circuit immediately after the trigger, and the one-shot circuit is activated by reversing the running direction of the tape immediately after the trigger. Re-triggering is prevented and malfunctions are prevented.

〔Example〕

One embodiment will be described with reference to the drawings.

In the drawing, KS, KF, KP, and KR are operation keys for stop, fast forward, playback, and rewind, each of which is grounded at one end. Each consists of an automatic return switch and outputs a low-level operation signal. do.

For A1 to A4, one input terminal is each operation key KS for stop, fast forward, playback and rewind.
1st to 4th AND gates connected to KF, KP, and KR, LC stops, fast forwards, plays,
It is a logic control circuit in which the input terminals for each operation mode of rewinding are connected to the output terminals of the first to fourth AND gates A1 to A4, respectively, and the operation keys KF, for fast forwarding, playback, and rewinding are
When pressing KP and KR, the driver circuit described later,
Outputs a control signal to the display circuit and fast forwards.
In the playback and rewind operation modes, the signal output terminals OF, OP,
A high level signal is output from each OR.

MD and DC are a driver circuit for driving and controlling the tape running drive mechanism M and a display circuit for displaying the operation mode, respectively, based on control signals from the logic control circuit LC.

NA1 is a first NAND gate whose one input terminal is connected to the rewinding signal output terminal OR of the logic control circuit LC, whose other input terminal is grounded via the first resistor R1, and whose output terminal is connected to the third
It is connected to the other input terminal of AND gate A3. Both input terminals of NA2 are the playback signal output terminal OP of the logic control circuit LC, and the first resistor R
1, and the output terminal is connected to the other input terminal of the fourth AND gate A4, and a repeat control gate section is formed by the AND gates A3 and A4 and the NAND gates NA1 and NA2. There is.

Both input terminals of OR1 are signal output terminals for fast forwarding and playback of the logic control circuit LC.
This is a first OR gate for detecting the running state of the tape connected to OF and OP in the forward direction.

MS is a counter switch with one end grounded, and is attached to a 3-digit memory counter (not shown) with a ring counter configuration that counts up and down when the tape runs in the forward and reverse directions, respectively. It turns on when the most significant digit of the memory counter's count value changes from "8" to "9" and changes from "9" to "0".
is turned off due to a change in the value, and the count value becomes "900".
~ Remains on only when "999".

R2 is the DC power supply (+B) and counter switch
The second resistor for current limiting connected between the other end of the MS, NA3, has one input terminal as the first OR gate.
A third NAND gate connected to the output terminal of OR1, C1 and R3 are a first capacitor and a third resistor connected in series between the other end of the counter switch MS and the ground.
A connection point of the resistor R3 is connected to the other input terminal of the third NAND gate NA3, and a differentiating circuit is formed by the first capacitor C1 and the third resistor R3.

NA4 is the fourth NAND gate whose one input terminal is connected to the rewinding signal output terminal OR of the logic control circuit LC, and IV1 and C2 are the terminals connected between the other end of the counter switch MS and the other input terminal of the fourth NAND gate NA4. The first inverter and the second capacitor are connected in series between them, and R4 is a fourth resistor provided between the other input terminal of the fourth NAND gate NA4 and the ground, and together with the second capacitor C2, constitutes a differentiating circuit. .

NA5 has both input terminals as 3rd and 4th NAND gates
The fifth NAND gate connected to the output terminals of NA3 and NA4, respectively, SG is the third to fifth NAND gate NA3 to NA5, and the second to fourth resistor R2
˜R4, a signal generation circuit composed of first and second capacitors C1 and C2, and a first inverter IV1.

SW1 is a first operation selector switch whose first terminal a is open, whose second terminal b is connected to the output terminal of the fifth NAND gate NA5, and whose common terminal CO
is grounded via the fifth resistor R5.

TE is the tape end detection signal input terminal, OR
2 has 4 input terminals: operation keys KS, KF, KP, KR for stop, fast forward, playback and rewind.
A low-level active second OR gate for key operation detection is connected to each of the other ends, and OR3 is a third OR gate whose both input terminals are connected to the output terminal of the second OR gate OR2 and the detection signal input terminal TE, respectively. .

For FF, the set input terminal S is the third OR gate OR3
A5 is a control circuit consisting of an R-S flip-flop connected to the output terminal of A5, a fifth AND gate whose both input terminals are connected to the common terminal CO of the first operation changeover switch SW1 and the output terminal Q of the control circuit FF, R6 is the sixth resistor provided between the output terminal of the fifth AND gate A5 and the reset input terminal R of the control circuit FF, and C3 is the sixth resistor provided between the reset input terminal R of the control circuit FF and the ground. The time constant circuit of the sixth resistor R6 and the third capacitor C3 constitutes a delay reset circuit.

C4 and C7 are the fourth and seventh capacitors connected in series between the detection signal input terminal TE and the ground.
A fourth capacitor C4 and a seventh resistor R7
Configure a differentiating circuit.

Both input terminals of OR4 are the output terminal of the fifth AND gate A5, the fourth capacitor C4, and the seventh resistor R.
The fourth OR gate is connected to each of the connection points of 7, OS is a one-shot circuit whose input terminal is connected to the output terminal of the fourth OR gate OR4, and SW2 is a second circuit whose common terminal CO is connected to the output terminal of the one-shot circuit OS. It is an operation changeover switch, and the repeat terminal R is the first and second NAND gate NA1, NA.
The stop terminal S is connected to the other input terminal of the first AND gate A1 via the second inverter IV2. R8 is an eighth resistor provided between the stop terminal S of the second operation changeover switch SW2 and the ground.

Note that when the operation signals of the operation keys KS, KF, KP, and KR become low level, the logic control circuit LC operates at low level active.

Furthermore, the AND gates A1 to A4 act as OR gates for low level active operation.

In addition, a high-level tape end detection signal generated by the detection of the tape leader, etc. is input to the detection signal input terminal TE when the tape has run to the end in both the forward and reverse directions. be done.

Next, the operation of the above embodiment will be explained.

First, a case will be described in which the first operation changeover switch SW1 is switched to the first terminal a.

In this case, the first operation changeover switch SW1 is switched to cut off the control signal of the signal generation circuit SG, so the output signal of the fifth AND gate A5 is held at a low level, and the count value of the memory counter is independent of travel control. Become.

And operation key KF for fast forwarding or playback
Or, by the control of the logic control circuit LC based on the operation signal of KP, when the tape runs in the forward direction and reaches the end of the tape in fast forward or playback mode, and when the operation signal of the operation key KR for rewinding Based on logic control circuit
Under the control of the LC, when the tape runs in the reverse direction in the rewind mode and reaches the beginning of the tape, a tape end detection signal is input to the detection signal input terminal TE, and this detection signal causes the one-shot circuit OS to
is triggered, the output signal of the one-shot circuit OS becomes high level for a certain period of time.

At this time, if the second operation changeover switch SW2 is switched to the stop terminal S, the one shot circuit
The high level output signal of the OS is connected to the second inverter IV.
2, a low level signal is applied to the stop mode input terminal of the logic control circuit LC through the first AND gate A1, the logic control circuit LC switches the operation mode to the stop mode, and the tape is started. auto-stopped,
An autostop operation is performed at the start or end.

On the other hand, if the second operation selector switch SW2 is switched to the repeat terminal R, when the end of the tape is reached by forward playback, the high level output signal of the one-shot circuit OS causes the second When the output signal of the NAND gate NA2 becomes low level, the signal is applied to the rewind mode input terminal of the logic control circuit LC via the fourth AND gate A4, and the operation mode is changed by the logic control rewind LC. The mode is switched to rewind mode, and the tape is rewound by running in the reverse direction.

Furthermore, when the tape is rewound to the starting end by running in the reverse direction, the output signal of the first NAND gate NA1 becomes low level due to the high level output signal of the one shot circuit OS, and the signal is passed through the third AND gate A3. is applied to the playback mode input terminal of the logic control circuit LC, the logic control circuit LC switches the operation mode to playback, the tape runs in the forward direction and is played from the beginning, and the auto-repeat operation The tape is played repeatedly from the beginning.

Next, the operation when the first operation changeover switch SW1 is switched to the second terminal b and set to output the control signal of the signal generation circuit SG will be described.

First, the operation of the signal generation circuit SG will be explained.

When the tape runs in the forward direction in fast forward mode or playback mode, the memory counter counts up as the tape runs, and the count value changes from "999" to "000" depending on the up count. , when the most significant digit changes from "9" to "0", the counter switch MS shifts from on to off, and at this time, the third and fifth NAND gates NA3 and NA5 output a high-level control signal with a pulse waveform. is formed and output to the second terminal b.

On the other hand, when the tape runs in the opposite direction in rewind mode, the memory counter counts down as the tape runs, and the count value changes from "000" to "999" as the tape runs. , when the most significant digit changes from "0" to "9",
Counter switch MS transitions from off to on,
At this time, the fourth and fifth NAND gates NA4,
A high-level control signal with a pulse waveform is formed by NA5 and output to the second terminal b.

Next, the control circuit FF controls any operation key.
When KS, KF, KP, and KR are pressed, they are set by the operation signal via the second and third OR gates OR2 and OR3.

In other words, when a key operation is performed, the control circuit
FF is set, and at this time, the output signal of the output terminal Q of the control circuit FF becomes high level, and the fifth AND gate A5 is held on.

Therefore, the control signal of the signal generation circuit SG input to the second terminal b during the setting of the control circuit FF is
5th AND gate A5 and 4th OR gate OR
Trigger the one-shot circuit OS through 4.

Therefore, when the first operation changeover switch SW1 is switched to the second terminal b, the control signal of the signal generation circuit SG and the tape when the count value changes from "999" to "000" while traveling in the forward direction. The one-shot circuit OS is triggered by the tape end detection signal when the tape has traveled to the end of the tape. The one shot circuit OS is triggered by the tape end detection signal when the tape reaches the starting end.

When the second operation selector switch SW2 is switched to the stop terminal S, the logic is activated based on the first high-level output signal of the one-shot circuit OS, regardless of whether the vehicle is traveling in the forward or reverse direction. The operation mode is switched to the stop mode by the control circuit LC, and the tape is automatically stopped.

Therefore, when the second operation changeover switch SW2 is switched to the stop terminal S, auto-stop operations in both forward and reverse directions based on changes in the count value can be used to auto-stop fast-forwarding, playback, or rewinding. At the end of a certain song, reset the memory counter and set the count value to ``000''.
After rewinding with the settings set to 000'', that is, at the end of the specified song, the tape will automatically stop and playback will automatically stop.

Also, if you reset the memory counter at the beginning of the desired song, rewind the tape to the beginning, start playback, play several songs, and then switch to fast forward, the count value will change to When the number changes from ``999'' to ``000,'' tape running stops and automatic cueing of the desired song is performed.

On the other hand, if the second operation changeover switch SW2 is switched to repeat terminal b, the count value changes from "999" to "000" during playback in the forward direction or the tape runs to the end. The operation mode is switched to rewind mode and the tape runs in the opposite direction, and when the count value changes from "000" to "999" while running in the reverse direction due to rewinding, or when the tape runs to the beginning of the tape, the operation starts. The mode is switched to playback mode and the tape runs in the forward direction.

By the way, the control signal of the signal generation circuit SG via the fifth AND gate A5 is delayed by the delay reset circuit and supplied to the reset input terminal R of the control circuit FF, and immediately after the one-shot circuit OS is triggered, The control circuit FF is reset and the fifth AND gate A5 is turned off.

Therefore, for example, the count value is "999" due to the up count based on the forward direction of playback.
Immediately after changing from to "000" and entering rewind mode, the down count based on rewind will cause
Even if the count value changes from "000" to "999", the one-shot circuit OS is not triggered, and rewinding continues, and when the tape runs in the opposite direction to the beginning and the tape end detection signal is input, the one-shot circuit OS is not triggered. The circuit OS is triggered to enter playback mode.

That is, when the one-shot circuit OS is triggered by the control signal of the signal generation circuit SG via the fifth AND gate A5 when traveling in the forward or reverse direction, the control circuit FF is reset, so that the signal immediately after the traveling reversal is The triggering of the one-shot circuit OS based on the control signal of the generation circuit SG is blocked, and when the tape has run to the beginning or end, the one-shot circuit OS is triggered by the tape end detection signal.

Note that the reset control circuit FF receives the tape end detection signal or any of the operation keys KS,
It is reset again by the KF, KP, and KR operation signals.

Therefore, when the second operation changeover switch SW2 is switched to the repeat terminal R, the combination of the tape running direction, the control signal of the signal generation circuit SG, and the trigger order of the one shot circuit OS of the tape end detection signal is Based on the alignment, by reproducing and rewinding the auto-repeat operation, auto-repeat playback can be performed on the portion between the beginning or end of the tape and any position set by the count value.

Therefore, for example, if you reset the memory counter to the count value "000" at the end of a song that starts from the beginning of the tape, then rewind to the beginning of the tape and start playback, the count at the beginning of the tape will be If the value is ``450'', the value is counted up from ``450'' during playback, and when it changes from ``999'' to ``000'', that is, when the specified position on the tape is reached, the signal generation circuit
A control signal is output from the SG to enter rewind mode, and playback is repeated from the beginning again, allowing the desired song to be played repeatedly.

Also, for example, if you start playback after resetting the memory counter at the beginning of a song that starts in the middle of the tape, when the end of the tape is reached, the rewind mode will be entered and the count value will change from "000" to "999". When it reaches , it will switch back to play mode,
In this case as well, a desired song can be played repeatedly.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

When the first operation selector switch is switched to cut off the control signal of the signal generation circuit, the one-shot circuit is triggered only by the tape end detection signal, and at this time, based on the switching of the second operation selector switch, the one-shot circuit is triggered at the beginning or end of the tape. When auto-stop and auto-repeat playback from the beginning to the end are performed, and the second operation selector switch is switched to output the control signal of the signal generation circuit, the one-shot circuit is activated by the tape end detection signal and the control signal of the signal generation circuit. At this time, based on the switching of the second operation selector switch, auto-stop at any position specified by the count value when running in both forward and reverse directions, and the start or end of the tape and the count value. Since auto-repeat playback can be performed between any specified position,
With the simple operation of switching the first and second operation selector switches, when the tape is running in either the forward or reverse direction, the tape can stop running at any position, including the start and end, by auto-stop operation, It is possible to perform automatic playback stop, automatic cueing, etc., and it is also possible to repeatedly play a section of any length from the beginning or end of the tape by auto-repeat operation.

[Brief explanation of drawings]

The drawing is a wiring diagram of one embodiment of the tape running control device of the present invention. KS, KF, KP, KR...Operation keys, LC...Logic control circuit, MS...Counter switch, SG...Signal generation circuit, OS...One shot circuit, SW1, SW2...1st, 2nd operation Changeover switch, FF...control circuit, A5...AND gate, R...repeat terminal, S...stop terminal.

Claims (1)

[Scope of Claims] 1. Operation signals from a plurality of operation keys are input to input terminals for each operation mode, and the tape travel drive mechanism is controlled by the signal input from each input terminal to control tape travel. a logic control circuit; a memory counter having a ring counter configuration that counts up and down respectively as the tape runs in the forward and reverse directions; a counter switch that is turned on when the tape is running in the forward direction; and a signal generation circuit that outputs control signals depending on the off-state of the counter switch when the tape is running in the forward direction and the on-state change of the counter switch when the tape is running in the reverse direction. a first operation changeover switch which can be operated to output or cut off the control signal, and a tape end detection signal is input when the tape has run to the end by running in the forward direction and in the reverse direction. a tape end detection signal input terminal; a control circuit comprising a flip-flop that is set by the operation signals of the respective operation keys and the detection signal; a one-shot circuit that is triggered by the control signal via the AND gate and the detection signal of the detection signal input terminal and outputs a pulse signal; and the first operation switching. a delay reset circuit that delays the control signal via a switch and resets the flip-flop immediately after the trigger of the one-shot circuit; and an output signal that switches the output signal of the one-shot circuit to a stop terminal and a repeat terminal by operation. a second operation changeover switch that supplies the output signal of the stop terminal to the stop mode input terminal of the control circuit; and a second operation changeover switch that supplies the output signal of the repeat terminal when traveling in the reverse direction to the regeneration mode input of the control circuit. 1. A tape running control device comprising: a repeat control gate section which supplies a signal from the repeat terminal to a rewind mode input terminal of the control circuit when the tape is running in the forward direction.