JPS6244349B2 - - Google Patents

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD The present invention relates to a tape recorder music selection device used in a tape recorder. BACKGROUND ART In recent years, there has been a strong demand for music selection for tape recorders. An example of a conventional music selection device for a tape recorder will be described below with reference to the drawings. FIG. 4 shows a conventional music selection device for a tape recorder. In FIG. 4, 1 is a signal input terminal, 2 is a song interval detection circuit, 41 is a transistor, and 42 is a solenoid (plunger). The operation of the tape recorder music selection device configured as described above will be described below.
First, a reproduction signal of a signal recorded on a magnetic tape is applied to the signal input terminal 1, an inter-song signal is detected by the inter-song signal detection circuit 2, and in addition to the output transistor 41 of this inter-song signal detection circuit 2, the inter-song signal is When a signal is output, the transistor 41 is turned on to operate the solenoid 42, and the solenoid 42 drives the stop switch of the tape recorder to stop it, and the force of this solenoid drives the play switch to start the play operation. Can be switched. Next, FIG. 5 shows a conceptual diagram of a conventional operation in which a stop or play operation is performed at the third song. A shift register 100 consisting of flip-flops FF1, FF2, and FF3 is added to FIG. 4. FF1 is activated by the first output signal of the inter-song signal detection circuit, and FF1 is activated by the second one.
It is also possible to operate the FF2 and the third FF3 to operate the transistor 41 and the solenoid 42 to perform a stop or play operation. Problems to be Solved by the Invention However, in the above configuration, the stop or play operation is only performed upon detection of the inter-music signal for the next first song. Furthermore, if a stop or play operation is to be performed upon detection of the inter-music signal of the third tune, three flip-flops must be used. In view of the above-mentioned problems, the present invention can be configured by using only two flip-flops to perform a stop or play operation based on the detection of a signal between songs of the third song, and furthermore, can be configured by using only two flip-flops. The present invention provides a music selection device for a tape recorder that can operate by detecting arbitrary inter-music signals. Means for Solving the Problems The music selection device of the present invention includes two flip-flop circuits that operate in a first state and a second state inverted from the first state, and an output of the first flip-flop circuit. In addition to the input of the second flip-flop circuit, the operation is controlled by the output of the first and second flip-flop circuits, and when the first and second flip-flop circuits are in the first state, the flip-flop circuit is turned on and the first or second flip-flop circuit is turned on. a first transistor that is turned off when the flip-flop circuit is inverted to a second state; a first indicator operated by the first transistor; and an output of the first flip-flop circuit that is inverted to a second state. When the second
, a third indicator operated by the output when the second flip-flop enters the second state, and a switch. Operation The present invention inverts the first flip-flop circuit from the first state to the second state by the generated first pulse signal by operating the switch configured as described above. The first
The first flip-flop circuit is returned to the first state by the second pulse signal, the second flip-flop circuit is inverted to the second state, and the first flip-flop circuit is left in the state by the third pulse signal. operates to bring the second flip-flop circuit into the first state;
The output pulse signal of the inter-track signal detector, which generates a pulse signal corresponding to a non-recorded area during reproduction of a magnetic tape, is applied to the first and second flip-flop circuits to change the second flip-flop circuit from the second state to the first state. state, and the first flip-flop circuit is set to the first state.
state to the second state, the second flip-flop circuit is kept in the first state by the next output pulse signal from the inter-song signal detector, the first flip-flop circuit is brought from the second state to the first state, and the first transistor is changed from the second state to the first state. is turned on to turn on the first display, and even if the next output pulse signal from the inter-song signal detector is applied while the first display is on, the states of the first and second flip-flop circuits will not change. The tape recorder can be kept in the first state, and the tape recorder can be stopped or started to play by detecting an inter-song signal of any one of the first, second, and third songs. Embodiment A music selection device for a tape recorder according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which a reproduction signal of a signal recorded on a magnetic tape is applied to a terminal 1, an inter-song signal detection circuit 2 detects an inter-song signal, a music selection circuit 4 selects a song, The control circuit 43 is controlled by the output of the music selection circuit 2 and the output signal of the inter-music signal detection circuit 2. This music selection circuit 4 uses a flip-flop circuit (hereinafter referred to as FF).
The FF shown in FIG. 1 uses a JK flip-flop circuit. When the clock input applied to the T terminal changes from a low voltage (hereinafter referred to as L) to a high voltage (hereinafter referred to as H), this J-KFF
Read the input conditions of the input applied to the terminal, and
When the clock input to the circuit changes from H to L, an output appears at the Q terminal according to the truth values shown in the table below. At this time, the output of the terminal shows a voltage opposite to the output of the Q terminal. Furthermore, when the reset input applied to the R terminal is set to L, the output of the Q terminal of the FF is reset to L and the output of the terminal is reset to H, regardless of other input conditions, thereby setting the FF to the first state. Here, the first state is when the output of the Q terminal is L and the output of the terminal is H, and the second state is when this is reversed and the output of the Q terminal is H and the output of the terminal is L. Further, tn shown in the table below represents the bit time before the clock, and tn+1 represents the bit time after the clock. Qn means that the state of the output of the Q terminal does not change even if a clock input is input, and "Qn" means that the state of the output of the Q terminal is inverted by the clock signal.

[Table] First, FF10 and FF14 are in the reset state, that is, Q
Assume that the output of the terminal is L and the output of the terminal is H. Then, L is applied to the emitter of the transistor 20 and H is applied to the base via the resistor 22, so that the transistor 20 becomes conductive and the first indicator 18 lights up. Here, a light emitting diode (LED) is used. This is the initial state. At this time, the outputs of the terminals of the FFs 10 and 14 to which the other second display 11 and third display 5 are connected are both H, so the displays 11 and 15 do not light up. When the switch 36 is then turned on, a charging current flows through the capacitor 34 through the resistor 33, and a negative pulse signal such as the E signal in FIG. 1 is applied to the T terminal of the FF 14 and the emitter of the transistor 28. At this time, the base of the transistor 28 is connected to the terminal of the FF14 via the resistor 31, and since the output of the terminal of the FF14 is H, the transistor 28 becomes conductive, and a negative voltage is applied to the terminal of the transistor 28 and the T terminal of the FF10. pulse signal is added. Then, from the truth value in the table above,
The J and K terminals of FF10 are both considered to be H in the double state (when the J and K terminals are not set to L, they are set to H)
FF10 is inverted. On the other hand, in the FF14, since the J terminal has been L and the K terminal have been H, the output of the Q terminal is L and the output of the terminal is H, so the state does not change. Then, the second indicator 11 lights up because the output of the terminal of the FF 10 becomes L. Display 15
does not light up because FF14 does not change. Further, the emitter of the transistor 20 remains at L, but the base of the transistor 20 is turned off because the output from the terminal of the FF 10 becomes L, and the first indicator 18 no longer lights up. That is, when the switch 36 is pressed once, the lighting position changes from the first display 18 to the second display 11. Then, when switch 36 is pressed again, the negative pulse signal becomes FF.
A negative pulse signal is added to the T terminal of FF 14 and the emitter of transistor 28, and is further applied to the T terminal of FF 10. Then, FF10 is inverted, and the output of the Q terminal becomes L and the output of the terminal becomes H. On the other hand, until now in FF14, the J terminal was H and the K terminal was L, so the output of the Q terminal was H and the output of the terminal was L.
This means that it has been reversed. Then, although the base of the transistor 20 is at H, the emitter is also at H, so the transistor 20 is turned off and the display 18 does not light up. Further, the output of the terminal of the FF 10 becomes H and the display 11 does not light up. Display 15 is FF
It lights up because the output of terminal 14 becomes L. That is, only the display 15 lights up. Then, when the switch 36 is turned on again, a negative pulse is applied to the T terminal of the FF14 and the emitter of the transistor 28, but since the base of the transistor 28 is L, the transistor 28 remains off, and the FF10
No negative pulse is applied to the T terminal of . Therefore
The state of the FF 10 does not change, and the display 11 remains off. On the other hand, in FF14, the J terminal is L and the K terminal is H, so the output of the Q terminal is L and the output of the terminal is H. Therefore, the display 15 is turned off.
Then, the output of the FF10 terminal becomes H, and the output of FF14 becomes Q.
Since the terminal has become L, the transistor 20 becomes conductive, the indicator 18 lights up, and the initial state is restored. From the above, first display 1
If the number 8 is lit, when the switch 26 is operated once, the display 11 will be lit, and then the switch 36 will be lit.
It is possible to return to the original position and repeat the operation. For example, assume that the switch 36 is operated and the third display 15 is turned on. Then, a magnetic tape reproduction signal as shown in FIG. 2a is applied to terminal 1. H in this reproduction signal is a portion between songs where no music is recorded, and is a non-recorded portion.
The inter-song signal detection circuit 2 for detecting this unrecorded portion amplifies the signal shown in Fig. 2a, then rectifies it, and then rectifies the signal shown in Fig. 2b.
Convert to DC voltage as shown. Then, no DC voltage is output between the J degree curves. This creates a positive pulse signal as shown in c in Figure 2 with a width of a certain period of time (for example, 0.1 seconds) from the beginning of the J-degree interval.
This is output as the output of the inter-song signal detection circuit 2. Then, a positive pulse signal is applied to the bases of transistors 32 and 25. Then transistor 32
conducts, and the reset input to the R terminal of the FF 14 is set to L, so the FF 14 is reset, the output of the Q terminal becomes L, the output of the terminal becomes H, and the display 15 is turned off. On the other hand, the base of the transistor 26 is connected to the collector of the transistor 20 via a resistor 27, and at this time, the transistor 20 is off and the collector is at H level, and the transistor 26
is on. Then, since a positive signal is applied to the base of the transistor 25, the transistor 25 becomes conductive, and a negative pulse signal is applied to the T terminal of FF10, and FF10 is inverted and the output of the Q terminal becomes H.
The output of the terminal becomes L and the indicator 11 lights up. Furthermore, as shown in Figure 2, not only the inter-song signal of one unrecorded part, but also the second unrecorded part in the next unrecorded part as shown in Figure 3.
When a positive pulse signal of
is turned on and the FF 14 is reset. Since the FF 14 has been reset before, it continues to be in a non-inverted state, and the display 15 remains off, while the transistor 20 is also off, so the transistor 26 is on, and the transistor 25 is turned on. Then, a negative pulse is applied to the T terminal of the FF 10, the FF 10 is inverted, and the output of the Q terminal changes from H to L, and the output of the terminal changes from L to H, so the display 11 is turned off. With this, FF10, 14
When both are turned off, the transistor 20 becomes conductive and the indicator 18 lights up. When a third positive pulse is further applied to the transistors 25 and 32 from the inter-music signal detection circuit 2, the transistor 32 is turned on and the FF 14 continues to be reset. On the other hand, since the transistor 20 is on, the base of the transistor 26 becomes L, and since the transistor 26 is off, the transistor 25 is also off. Therefore, since a negative pulse signal is not applied to the T terminal of FF10, the output of the Q terminal of FF10 in the first state continues to be L and the output of the terminal continues to be H. ,1
Since the transistor 5 remains off, the transistor 20 turns on and the display 18 continues to turn on. That is, when the third display 15 is on, when the first inter-song signal is added, the third display 15 changes to lighting of the second display 11, and the second inter-song signal is added. Then, the second display 11 is turned off and the first display 18 is turned on, and when the third inter-song signal is added, the first display 18 continues to be lit. Thereafter, even when the fourth and fifth inter-musical signals are applied, the first display 18 continues to be lit. Therefore, the positive pulse from the output of the above-mentioned inter-song signal detection circuit 2 is connected to be applied to the transistor 41 of the control circuit 43 via the resistors 37 and 40. When the indicator 11 is lit, the transistor 20 is off, and the voltage at the collector of the transistor 20 is H. Therefore, the resistor 3 is connected to the base of the transistor 39.
Since the H voltage is applied through the transistor 8, the transistor 39 is turned on, and the connection point between the resistors 37 and 40 is set to the L voltage, the positive pulse of the inter-music signal is not applied to the base of the transistor 41. However, when the first indicator 11 lights up, the transistor 20 is turned on, and the collector of the transistor 20 becomes an L voltage, and the transistor 39 is turned off. As a result, a positive pulse of the inter-music signal is applied to the base of the transistor 41 of the control circuit 43, turning on the transistor 41 and operating the solenoid 42 (plunger) connected to the collector of the transistor 41. The stop switch of the tape recorder can be driven to stop the tape recorder, and the play switch can be driven by the force of this solenoid to switch to play operation. Generally, during the cue operation that detects the playback signal during fast forwarding,
The song selection circuit 4 and the inter-song signal detection circuit 2 are often operated during the review operation that detects the playback signal in the rewind state. Sometimes you want to stop at the beginning or end of a song. At this time, press the switch 36 to display the third display 15.
Set it so that it lights up. When the inter-song signal comes twice, the first indicator 11 lights up. At this time, to prevent the transistor 39 from turning off immediately, a capacitor 51 is placed between the base of the transistor 39 and the ground, and the positive inter-track signal is connected to the base of the transistor 39 for a time longer than the pulse width of the detection signal. A pulse is applied and transistor 4
1 is turned on and operates a solenoid 42 (plunger) connected to the collector of the transistor 41. This solenoid 42 drives the tape recorder's stop switch to stop it, and the force of this solenoid operates the play switch. It can be driven and switched to play operation. Generally, the song selection circuit 4 and the inter-song signal detection circuit 2 are often operated during the cue operation to detect the playback signal during fast forwarding and the review operation to detect the playback signal during the unwinding state. When you want to run from the beginning of a later song, or when you
Sometimes you want to stop at the beginning or end of a song. At this time, the switch 36 is pressed to set the third display 15 to light up. When the inter-song signal comes twice, the first indicator 11 lights up.
At this time, to prevent the transistor 39 from turning off immediately, a capacitor 51 is placed between the base of the transistor 39 and the ground, and the base of the transistor 39 is maintained for a time longer than the pulse width of the detection signal. At the time of the third detection signal, the transistor 39 is off, so the detection signal is applied to the transistor 41, operating the solenoid, turning on the play switch of the tape recorder, and turning off the switch 45 to perform the play operation. When the player is playing, the inter-song example detection circuit 2 and the song selection circuit 4 are kept inactive to continue the playing state. On the other hand, when it is desired to stop the third pulse, a solenoid can be used to drive a stop switch to stop the tape recorder. To select the second song from now on, press the second display 1.
When the switch 36 is set to turn on the switch 1, the same operation occurs. On the other hand, when selecting the next first song, it is preferable to set the switch 30 so that the first display 18 is turned on. When you want to select a song by turning on the power switch 45, a charging current flows through the capacitor 5 through the resistor 5, turning on the transistor 8, and the reset input to the R terminal of FF10 becomes L, turning FF10 off. The output of the Q terminal is L and the output of the terminal is _L1 , so the J terminal of the FF14 is L and the K terminal is H, so the FF14 is also in the first state, and the transistor 20 is turned on. , the first display 18 is turned on. In this state, when an inter-song signal is received, the first song can be selected.
Also, when the first display 18 is on and an inter-song signal is input, simply adding a pulse signal to the control circuit 43
The reason why the transistor 26 is turned off so that no signal is applied to the T terminal of the FF 10 is to prevent malfunction. If there is no transistor 26, when the first display 18 is turned on, an inter-song signal is input to select a song and control the play state or stop state, and at the same time a signal is applied to the T terminal of the FF 10 and the second display 11 is turned on. This is because the music selection operation on the first display 18 will cause the second display 11 to operate. In this way, the transistor 26 is provided so that the music selection operation can be performed only when the first display 18 is always lit. On the other hand, to explain the capacitor 29, the second
switch 36 when the display 11 is on.
When you want to turn on the third display 15 by operating
If FF14 is inverted before FF10 and changes from the first state to the second state, transistor 2
The base of transistor 8 becomes L, and while the signal is not sufficiently applied to the T terminal of FF10, transistor 28
may turn off and the FF 10 may not change from the second state to the first state. Therefore, at this time
FF10 enters the second state and the second and third indicators 1
A malfunction may occur in which both lights 1 and 15 light up. For this purpose, a capacitor 29 is added between the base of the transistor 28 and the ground, and the transistor 29 is connected so that even if the FF 14 changes from the first state to the second state, a sufficient pulse signal is applied to the T terminal of the FF 10.
8 on-time to eliminate malfunctions. Also, the output point G of the terminal of FF10 and the K of FF14
The connection line to the terminal input can be omitted since the same operation will occur even without it. This is because, at this time, the input to the K terminal of the FF 14 is always regarded as an H voltage. Effects of the Invention As described above, the present invention provides the first state and the first state.
The output of the first flip-flop circuit is applied to the input of the second flip-flop circuit, and the operation is controlled by the outputs of the first and second flip-flop circuits. , the first and second flip-flop circuits are turned on when they are in the first state;
Or, the second flip-flop circuit is inverted and the second flip-flop circuit is inverted.
a first transistor that is turned off when the state is
A first display device operated by this first transistor and an output of the first flip-flop circuit are connected to a second display device.
a second indicator operated by the output when the second flip-flop is in the second state; a third indicator operated by the output when the second flip-flop is in the second state; and a switch. Therefore, it is possible to use a simple configuration of two flip-flops, which is smaller than the conventional three flip-flops used for selecting three songs. Generally J-K
Unlike flip-flops, which use 50 to 60 transistors and resistors, flip-flops are constructed with fewer flip-flops and are easier to construct.

[Brief explanation of the drawing]

FIG. 1 is a wiring diagram showing an embodiment of the music selection device for a tape recorder according to the present invention, FIGS. 2 and 3 are waveform diagrams for explaining the operation of the device, and FIGS. FIG. 2 is a block diagram of a music selection device for a tape recorder. 2...Song signal detection circuit, 4...Tuning selection circuit,
5, 29, 34, 51... Capacitor, 8, 2
0,25,26,28,39,41...Transistor, 10,14...Flip-flop circuit, 1
1, 15, 18...Display device.

Claims (1)

[Claims] 1. Two flip-flop circuits that operate in a first state and a second state inverted from the first state, and an output of the first flip-flop circuit is applied to an input of the second flip-flop circuit. , first, second
The operation is controlled by the output of the flip-flop circuit,
a first transistor that is turned on when the first and second flip-flop circuits are in a first state and turned off when the first or second flip-flop circuit is inverted and is in a second state; a first indicator operated by the transistor of the first flip-flop circuit; a second indicator operated by the output of the first flip-flop circuit when the output is inverted to the second state; The third indicator is activated by this output when the switch is turned on, and the first flip-flop circuit is changed from the first state to the second state by the first pulse signal generated by the switch operation.
The second flip-flop circuit is inverted to the first state, and the second flip-flop circuit is returned to the first state by the second pulse signal, and the second flip-flop circuit is inverted to the second state. a first operating means operable to put the first and second flip-flop circuits in the first state by a third pulse signal; an inter-song signal detector, which applies the output pulse signal of the inter-song signal detector to the first and second flip-flop circuits to change the second flip-flop circuit from the second state to the first state.
state, changes the first flip-flop circuit from the first state to the second state, causes the second flip-flop circuit to remain in the first state by the next output pulse signal from the inter-track signal detector, and changes the first flip-flop circuit from the first state to the second state. The second state is changed to the first state, the first transistor is turned on and the first indicator is turned on, and when the first indicator is on, the next output pulse signal from the inter-song signal detector is 1. A music selection device for a tape recorder, characterized in that the state of the first and second flip-flop circuits remains in the first state even when a song is added. 2. Apply the output pulse signal from the inter-track signal detector to the bases of the second and third transistors, connect the collector of the second transistor to the reset signal input part of the second flip-flop circuit, and connect the collector of the second transistor to the reset signal input part of the second flip-flop circuit. The collector is connected to the signal input of the first flip-flop, and the third transistor is deactivated only when the first indicator is activated by the first transistor, and the output pulse signal from the inter-track detector is 2. The music selection device for a tape recorder according to claim 1, wherein the music selection device is configured to be added to a control circuit for changing the operation of the magnetic recording/reproducing device.