KR910004444Y1 - Automatic eject circuit on recording end - Google Patents

Abstract

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Description

Automatic eject circuit when recording of VTR is completed

1 is a circuit diagram of the present invention.

2 is an output waveform diagram of each part of FIG.

* Explanation of symbols for main parts of the drawings

10: sensor detection terminal 100: timer display circuit

101: Micom 102: Digitron

200: standby circuit 300: rewind mode performance circuit

400: control circuit 500: stop mode execution circuit

600: ejector circuit 601: loading motor

SW: Timer switch FF ₁ , FF ₂ : Flip-flop

TR ₁ -TR ₃ : Transistor NOR: Noah Gate

AND ₁ , AND ₂ : AND gate D ₁ -D ₄ : diode

R ₁ -R ₇ : Resistor C ₁ : Capacitor

The present invention relates to an automatic ejection circuit when the recording of the VTR is completed to reduce the hassle and time during playback by using the VTR to automatically eject the program after the rewind operation is completed.

Conventionally, when the program is scheduled recording with the VTR, the power is turned off after the recording is completed. Therefore, in order to replay the recorded program, it was necessary to turn on the power and then perform the rewinding operation. This method was cumbersome and has a long time to regenerate because it requires manual key manipulation.

In view of this, the present invention sets the recording time and detects the setting of the timer using the T flip-flop, and detects the end of the timer using the noah gate and the flip-flop to automatically perform the rewind mode. And the start sensor (START SENSOR) to detect the completion of the rewinding operation by converting to the stop mode to stop the tape, and also to operate the loading motor (SORDING MOTOR) to draw the tape, which is attached to the accompanying drawings By explaining it is as follows.

As shown in FIG. 1, a timer switch SW, a resistor R ₁ , a microcomputer 101, and a digitron 102 are used to set a recording time after a timer is set according to an input pulse by switching. The timer display circuit 100 which is to be terminated afterward is composed of a T flip-flop (FF ₁ ), a diode (D ₁ ), a capacitor (C ₁ ), a resistor (R ₂ ) (R ₃ ), and a transistor (TR ₁ ). Is set to the standby circuit 200 to maintain the standby state for performing the rewind mode, the NOA gate (NOR), diode (D ₂ ), resistor (R ₄ ), T flip-flop (FF ₂ ) It is connected to each of the rewind mode performing circuit 300 to sense the end to perform the rewind mode, and the standby circuit 200 is connected to the rewind terminal (REW) through the rewind mode performing circuit 300 and the sensor detection terminal ( 10) is a transistor (TR _2), a resistance (R ₅₎ is composed of (R _6), a diode (D ₃₎ reverse operation is completed Consists detected by using the stop and the control circuit 400 for generating a control signal for the eject operation is carried out that in the AND gate (AND ₁₎ and a diode (D ₄₎ performs the stop mode, such that the tape is stopped in response to the control signal The circuit 500 includes an AND gate AND ₂ , a transistor TR ₃ , a resistor R ₇ , and a loading motor 601, which are switched according to the control signal to operate the loading motor to eject the tape. The rewind mode execution circuit 300 is connected to the circuit 600, respectively, and is connected to the stop terminal STOP through the stop mode execution circuit 500, and is configured to be connected to the eject circuit 600.

Referring to the effect of the present invention configured as described above in detail.

First, after setting the time required for the reservation recording and pressing the timer switch SW of the timer display circuit 100 to apply a pulse as shown in FIG. 2a, the pulse is applied to the standby circuit 200 and the microcomputer As a result, the microcomputer 101 operates to output a high signal as shown in FIG. 2B. Thus, the high signal is applied to the timer light emitting unit of the digitron 102 to perform a recording operation. A timer is set and the high signal is applied to one input terminal of the NOR gate NOR of the rewind mode performing circuit 300.

In addition, the pulse is T flip-flop (FF _1), a clock pulse terminal (CK) is applied, and the by the clock pulse T flip-flop (FF _1), so that the operation of the T flip-flop by the application in the wait circuit 200 A high signal is output from the output terminal Q of (FF ₁ ), as shown in FIG. 2C, and the high signal is a derivative composed of a capacitor C ₁ and a resistor R ₂ through a diode D ₁ . since the applied to the circuit, because the signal is slightly delayed by the differentiating circuit is applied to the base terminal of the transistor (TR ₁₎ This causes the transistor (TR ₁₎ conduction from the collector terminal of the transistor (TR ₁₎ is the 2d FIG. As shown in FIG. 5, the low signal is output and the low signal is applied to the other input terminal of the NOR gate NOR of the rewind mode performing circuit 300, so that the rewind mode performing circuit 300 is in a standby state.

When all of the reserved recording is completed in the above state, as shown in FIG. 2B, since the low signal is output from the microcomputer 101 of the timer display circuit 100, the low signal is applied to the digitron 102 to emit the timer. And the low signal is applied to one input terminal of the NOR gate NOR, the low signal output from the standby signal 200 and the NOR gate NOR from FIG. As described above, a high signal is output and the high signal is applied to one input terminal of the AND gate AND ₂ of the eject circuit 600 and at the same time, the T flip-flop FF ₂ is provided through the diode D ₂ and the resistor R ₄ . ) of the clock is applied to the pulse terminal (CK) the T flip-flop (the so thereby varying the output of the FF ₂₎ T flip-flop (high as from an output terminal (Q) of the FF ₂₎ are shown in the 2f FIG. Signal output And that the high signal is carried out automatically at the rewind operation, so applying a reverse terminal (REW).

On the other hand, when the rewinding operation is completed as described above, the start sensor detects the high signal as shown in FIG. 2g through the sensor detecting terminal 10 and the high signal is applied to the resistance of the control circuit 400 ( Since it is applied to the base terminal of the transistor TR ₂ through R ₅ ), the transistor TR ₂ is turned on to output a high signal from the emitter terminal of the transistor TR ₂ , and the high signal is a diode D _3. Is applied to the clear terminal CLR of the flip-flop (FF ₂ ) through) so that the T flip-flop (FF ₂ ) is reset and the low signal from the output terminal (Q) as shown in FIG. Is output and the inverted output terminal of the T flip-flop (FF ₂ ) The high signal output from the input terminal is applied to one input terminal of the AND gate AND ₁ of the stop mode execution circuit 500, and the high signal output from the control circuit 400 passes through the diode D ₄ . AND ₁ ) is applied to the other input terminal of the AND gate (AND ₁ ), and as shown in FIG. 2h, a high signal is output and applied to the stop terminal (STOP) as shown in FIG. 2h. Will be performed.

Meanwhile, the high signal output from the control circuit 400 is applied to the other input terminal of the AND gate AND ₂ of the eject circuit 600, and the rewind mode execution circuit is applied to one input terminal of the AND gate AND ₂ . Since the high signal 300 is output from the NOR gate NOR, a high signal is output from the AND gate AND ₂ as shown in FIG. 2i, and the high signal is transmitted through a resistor R ₇ . (TR _3), so is applied to the base terminal of the transistor (TR ₃₎ one of the flows through the current to the transistor (TR ₃₎ and the loading motor 601 to the ground, and operate the the loading motor 601 which The tape is ejected automatically.

As described above, the present invention has the effect of reducing the time until the recorded program is played by automatically ejecting the tape after the rewinding operation is performed at the same time as the recording of the program is completed. There is an effect that can improve the function of the VTR to eliminate the hassle.

Claims (2)

After the timer is set and the timer is set according to the input pulse by switching, the timer display circuit 100 and the flip-flop FF ₁ are operated in accordance with the input pulse. The rewind mode performing circuit 300 and the rewind operation are configured to sense the type of timer using the standby circuit 200 maintaining the standby state and the output of the microcomputer, and to perform the rewind operation using the flip-flop FF ₂ . The control circuit 400 generates a control signal for stopping and performing an eject operation upon detection of completion and a stop mode execution circuit 500 for stopping the tape according to the control signal and the loading motor by switching according to the control signal. It consists of an ejection circuit 600 which allows the tape to be ejected by operating so that the tape is automatically rewound and ejected after recording is completed. Automatically eject when recording circuit of the VTR completed as claimed. The method of claim 1, wherein the standby circuit 200 connects a diode D ₁ , a capacitor C ₁ , a resistor R ₂ , R ₃ , and a transistor TR ₁ to a T flip-flop FF ₁ . And the output of the flip-flop FF ₁ is delayed, and the rewind mode execution circuit 300 includes a diode D ₂ , a resistor R ₄ , and a T at a noar gate NOR for detecting the end of a timer. The flip-flop FF ₂ is connected to each other, and the eject circuit 600 is configured by connecting an AND gate AND ₂ , a transistor TR ₃ , and a resistor R ₇ to the loading motor 601. Automatic eject circuit when VTR recording is completed.