JPS6010375B2 - Repeat device for tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a repeat device for a tape recorder that selects a desired song from among a large number of songs recorded on a tape and repeatedly reproduces the selected song.

If you find music you like while playing a recorded tape and want to play it again, Ichimo Fumi's tape recorder relies on the tape counter display to manually rewind the song. I stop rewinding at the beginning of the song and set it to play mode again, but it is difficult to rewind exactly to the beginning of the song, and sometimes I end up rewinding too much or not rewinding enough. It was only by repeating the mode and rewind mode several times that it was possible to locate the beginning of the song. The object of the present invention is that if you like the currently playing song out of a large number of recorded music and want to play it repeatedly, you can set the repeat by simply pressing the repeat spade while the song is playing. To provide a repeat device for a tape recorder, in which when the playback of a song ends, the song is automatically rewound accurately to the starting position, and then the song is automatically played again. be. The present invention will be described below based on illustrated embodiments.

In FIG. 1, when the regeneration switch S is pressed, the OR gate OR, , inverter IN, (
Below, regarding the gate circuit, "OR, one," IN, one,
rBU, 1 is connected to give a signal to the set terminal of the R-S flip-flop circuit FF, through ``AND, 1'', and further through OR, , IN, and then OR5 to the reset terminal of the R-S flip-flop circuit FF2 via
They are connected to the reset terminals of flip-flop circuit FF3 so as to provide signals respectively. Fast forward switch S
2 is configured to apply a signal to the set terminal of the flip-flop circuit FF2 via the OR4, to the IJ set terminal of the flip-flop circuit FF, and to the reset terminal of the flip-flop circuit FF3 via the OR6 by pressing the switch. It is connected to the. By pressing the rewind switch S3, OR2, I
to the set terminal of the flip-flop circuit FF3 through N2, to the IJ set terminal of the flip-flop circuit FF through OR2;
They are connected to the reset terminals of flip-flop circuit FF2 via OR5 so as to provide signals, respectively. The output terminal Q of the flip-flop circuit FF is applied as a reproduction mode setting signal to the control circuit of the tape recorder, the output terminal Q of the flip-flop circuit FF2 is applied as a fast-forward mode setting signal to the control circuit of the tape recorder,
The output terminal Q of the flip-flop circuit FF3 is applied as a rewind mode setting signal to the control circuit of the tape recorder. Each control circuit of a tape recorder controlled by each of these signals is, for example, disclosed in U.S. Pat.
As described in the specification of No. 5, it can be configured by an electromagnetic plunger, a speed control circuit for a tape drive motor, etc., but since these control circuits are not essential to the present invention, detailed circuit diagrams are not provided. is not depicted.
The repeat switch S4 is connected to apply a signal to the terminal C of the JK flip-flop circuit FF4 via IN3 when the switch is pressed.

The eject switch S5 is designed to give a signal to the control circuit of the tape recorder as an eject signal via the buffer BU, when the switch is pressed. OR5
Each flip-flop circuit FF, FF through 70R6
They are connected to the reset terminals of 27FF3 to give signals respectively. The signal output from the output terminal Q of the flip-flop circuit FF4 is applied as a repeat signal MR to the input terminals of AND2 and AND3, which will be described later.
The signal output from A, which will be described later, is a repeat signal MR.
It is designed to be applied to the input terminal of ND4. Equalizer amplifiers for the left and right channels of the audio circuit (not shown) of the tape recorder are branched from a predetermined audio circuit, and audio signals of the respective channels are applied to buffer amplifiers 1 and 2.

The outputs of the buffer amplifiers 1 and 2 are mixed and amplified by the amplifier 3 and added to the input state B of the re-multipipeter FF5. The amplifier 3 is designed to fully swing the audio signal to about the power supply voltage, and if there is an audio signal, the amplifier 3 outputs a signal at a level of '.
It is assumed that if there is no audio signal, a low level (hereinafter abbreviated as "L") signal is output. The time constant of the remulti FF5 is set to a constant time constant determined by the resistor R2 and the capacitor C2, and feedback is applied from the output terminal Q to the input terminal A via the diode D, so that
The pulse signal is oscillated at intervals corresponding to the above-mentioned time constant. The signal at the output terminal Q of the re-multi FF5 is “
It is designed to be applied to the clock signal input terminal of register 4 via AND, , IN4, and AND4, and to the input terminal of OR2 via AND, , IN4, and AND2.

However, AND, the gate is opened by the reproduction mode setting signal of the terminal Q of the flip-flop circuit FF, and
2 is the repeat signal MR of JK flip-flop FF4
The gate of AND4 is opened by the repeat signal MR of flip-flop FF4. Tape-in switch S6 closes and generates a signal when a tape cassette is inserted into a predetermined cassette loading chamber, and this signal is transmitted to BU2.
After that, it is differentiated by a differentiating circuit consisting of a resistor R and a capacitor C and taken out as a falling signal, and this falling signal is ORed as a tape-in signal TPW.
, , are applied to the reset terminal of the flip-flop FF4, the set terminal of the re-multi FF5, the reset terminal of the register 4, and the reset terminal of the counter 5, which will be described later.

The tape run switch S7 is a switch that can be repeatedly opened and closed by the rotation of the reel stand of a tape recorder, for example, and the switch S? A pulse signal generated by opening and closing of the up/down counter 5 is applied to the count signal input terminal of the up/down counter 5. The reproduction mode setting signal from flip-flop FF and the fast forward mode setting signal from flip-flop FF2 are respectively applied to counter 5 as an addition command signal via OR3, and the rewinding mode setting signal from flip-flop FF3 is applied to counter 5. It is designed to be added as a subtraction command signal. The output signal of the counter 5 is applied to a comparator 6 and also to a data input terminal of a register 4.
The register 4 is configured to store the count value of the counter 5 at that time every time a clock signal is applied via the AND 4, and to add this stored value to the comparator 6. The comparator 6 compares the counted value of the counter 5 with the stored value of the register 4, and outputs a signal when the two match. This signal is the rewind mode setting signal from flip-flop FF3 and the rewind mode setting signal from flip-flop FF3.
The IJ beat signal M from the terminal Q of 4 is applied to the input terminal of OR2 via AND3 which opens the gate. Next, the operation of the present invention configured as described above will be explained.

Now, when the tape cassette is inserted into the specified loading chamber, switch S6 is closed and BU2, low resistance R, and capacitor C are connected.
, and appears as a tape-in signal TPIN. This signal causes flip-flop FF4 to
, the counter 5, and the register 4 are reset, and the multi-FF 5 is set again, and the signal TP
IN is applied to the set terminal of flip-flop FF through OR, elbow, and flip-flop FF is set, a reproduction mode setting signal is output from terminal Q, and the tape recorder is set to reproduction mode. This starts playing the tape. Re-multi FF5 uses signal TP
A pulse signal is oscillated at regular intervals from the terminal Q according to a time constant set by the resistor R2 and the capacitor C2. This signal is a flip. AND, which opened the gate by the playback mode setting signal from the top FF, and the river 4.
The signal MR from flip-flop FF4 is applied to the clock signal input terminal of register 4 via AND4 whose gate is opened. On the other hand, flip-flop FF
, is applied to the counter 5 as an addition command signal via OR3, and sets the counter 5 to the addition mode.

As described above, when the tape is run and playback is started by setting the playback mode, the tape run switch S is pressed.
7 generates a pulse signal by opening and closing, and this signal is added to the counter 5, which counts this in the addition direction. The count value of counter 5 is added to comparator 6 and also to register 4 as a data signal. The register 4 records the count value of the counter 5 every time a pulse signal is sent from the flip-flop FF5, and adds this stored signal to the comparator 6. Even if playback is started by the tape running in this way, if it starts from the leader section of the tape or happens to start from a no-signal section between songs, the re-multi FF 5 will operate as described above. .

However, when the recorded signal starts playing,
The audio signals of both the left and right channels are applied to the amplifier 3 via buffer amplifiers 1 and 2, and the amplifier 3 amplifies the audio signals to the level of the power supply voltage at full swing. ” is added as a signal to stop the oscillation operation of the multi-FF 5. Therefore, the signal applied to the register 4 via AND4, AND4 is stopped, and the register 4 maintains its state while storing the count value of the counter 5 at the time when the last pulse signal was applied. When one song finishes playing in this way, since there is a silent section between the next song and the next song, the signal applied to the re-multi FF 5 via buffer amplifiers 1, 2 and 3 stops, and the re-multi FF 5 oscillates. Resume operation.

Incidentally, since the silent part between songs is usually set to about 5 seconds, if the time constant of the re-multi FF5 is set to, for example, 3 seconds, at least one of the re-multi FF 5 is set in the silent part between songs. A pulse signal is generated, and based on this pulse signal, the stored value of the register 4 is updated to the count value of the counter 5 at that time. Note that the time constant of the re-multi FF5 is not such that it can be set to an extremely short value as long as it is shorter than the time of silent parts between songs. ``In order to avoid malfunctions due to silent parts in this one song,
It is desirable to set the time to a value that is shorter than the time of the silent part between songs and as long as possible within the range, and it is considered that about 3 seconds is preferable after all. After a number of songs are played in this way, a favorite song is played, and if the user wants to play this song repeatedly, the repeat switch S4 is pressed while that song is being played. By pressing switch S4, a pulse signal is applied to terminal C of flip-flop FF4 via IN3, flip-flop FF4 is inverted, AND2 is opened, and A is
Close ND4. When the reproduction of the song is finished in this state, the multi-FF 5 re-emits at least one pulse signal in the silent part between the song and the next song, as described above. However, since this pulse signal is not applied to the register 4, the value stored in the register 4 remains at the count value of the counter 5 at the time when the reproduction of the song to be repeated starts. On the other hand, the pulse signal of the re-multi FF5 is applied to the set input terminal of the flip-flop FF3 via the AND2, the OR2 and the IN2, and sets the flip-flop FF3. On the other hand, flip-flops FF, FF2 have OR4 and OR5, respectively.
Since the above-mentioned pulse signal is applied as a reset signal via , each of them is in a reset state. At this time, a rewind mode setting signal is issued from the flip-flop FF3, and the tape recorder is switched to the rewind mode.
Since the rewind mode setting signal is applied to the counter 5 as a subtraction command signal, the counter 5 is switched to the subtraction mode and the tape run switch S is opened and closed by the rewind operation.
The counter 5 performs a subtraction operation in response to the pulse signal from the counter 7. When the rewinding operation progresses to the beginning of the song to be repeated, the counted value by the counter 5 and the stored value by the register 4 match, and the comparator 6 detects the coincidence of these two and outputs a signal. emits.

The output signal of the comparator 6 is passed through the AND3 whose gate has already been opened by the beat signal M from the flip-flop FF4 and the rewind mode setting signal, and then the OR. ，
It is applied to the set signal input terminal of flip-flop FF via IN, to invert the flip-flop.
On the other hand, since the above signals are applied as reset signals to flip-flops FF2 and FF3 via OR5 and OR6, respectively, they are reset. Here, a playback mode setting signal is issued from the flip-flop FF, and the tape recorder is switched to the playback mode.
It operates as explained above. Repeat switch S4
If you press switch S4 again, flip-flop FF4 will be reversed again, thereby canceling the repeat, but if you leave switch S4 alone without pressing it again, the same song will be repeated over and over again. It will be played again.

Note that the re-multi FF5 can achieve the purpose of repeat by emitting one pulse signal in the silent part between songs, but the reason why we purposely made the pulse oscillate at intervals of about 3 seconds is because the tape Since the silent section in the nori-goo section is much longer than the silent section between songs, assuming that only one pulse is emitted in the onomatopoeic section, when repeating the song recorded next to the leader section, the leader section This is to eliminate the inconvenience that the beginning of the song never appears during repeat playback due to the inconvenience of being rewound an extra part.

This will be further explained in detail with reference to FIG. In Figure 2, the area from the start to point C is the leader section. If the re-multi FF5 is such that it emits only one pulse in the onomatopoeic part due to a certain time constant, the re-multi FF5 will emit a pulse signal only at point A in the leader part, and will not emit a pulse signal in the other parts. Does not emit a signal. Then, the playback of the song ends at point D, and after that a certain period of time (for example, 3
A single pulse signal is emitted at point E, which has elapsed (seconds), and rewinding is started based on this signal, but since this winding is now done up to point A, the longer the leader, the more When the song is rewound and played repeatedly, the leader section is also played back, meaning that the beginning of the song never appears. In this respect, in the present invention, re-multi FF5
Since it emits pulses at intervals of about 3 seconds, pulses are emitted at each time point A, B, and C in the reader section, and among these, at the last time point C, register 4 stores the count value of counter 5. From then on, the repeat play is performed up to point C, and as soon as the repeat play is successful, the desired song is played back.In addition, in the illustrated embodiment,
Fast-forwarding, rewinding, and playback operations can be performed with simple manual operations.

First, to perform fast forwarding, switch S2 is pressed. As a result, the flip-flop FF2 is set and a fast-forward mode setting signal is generated, and the fast-forward mode is switched to this, and the flip-flops FF and OFF3 are reset and do not generate any signals. To perform rewinding next time as well, press the switch S3. As a result, flip-flop FF3 is set and a rewind mode setting signal is generated, switching to the rewind mode, and flip-flops FF, FF2 are reset and do not generate any signals. To switch from fast forward or rewind mode to playback mode, press switch S. As a result, flip-flops FF, FF, are set, a reproduction mode setting signal is issued, and the reproduction mode is switched to, and flip-flops FF2, FF3 are set.
will be reset and will not emit any signal. Furthermore, to eject the tape cassette, press the switch. As a result, an eject signal is generated, which resets each flip-flop FF, FF2, FF3 and stops all previous operations.Furthermore, the eject signal is applied to the control circuit of the tape recorder to eject the tape cassette. As explained above, according to the present invention, a desired song can be automatically replayed and replayed with a simple operation, eliminating the need for repeated manual rewinding and replaying as in conventional tape recorders. It is extremely convenient, especially as a tape recorder for driving lessons.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation of the same embodiment. S41...Repeat switch, FF5...Pulse oscillator (re-multipiperator), AND. ...
...First gate, AND2...Second gate, AND4...Third gate, 4...Register, 5...
...Counter, 6...Comparator. Rare 1st library 2nd drawing

Claims (1)

[Claims] 1. A pulse oscillator that oscillates a pulse signal at regular time intervals and stops the oscillation when an audio signal from tape playback is input, and a first gate that allows the signal from the pulse oscillator to pass when in the playback mode. a second gate that opens in response to a repeat command signal and allows the signal from the first gate to pass through as a rewind command signal; and a second gate that opens the gate and allows the signal from the first gate to pass when the repeat command is released. 3 gate, a counter that counts in the addition direction or subtraction direction depending on the tape running length and the tape running direction, a register that stores the counted value of the counter by the signal from the third gate, and A repeat device for a tape recorder comprising a comparator that compares a count value with a value stored in a register and issues a reproduction command signal when the two match.