JPH07161095A - Video cassette recorder with automatic rewinding and reproducing function - Google Patents

Abstract

PURPOSE: To operate many VCRs with one person and save personnel expenditure by automatically rewinding a tape with only one time of a key pushing by a user and reproducing the tape from the beginning. CONSTITUTION: An auto rewinding/reproducing key 20 in a key array part is pushed after inserting a video tape wound about 1/2 length of the tape into a video cassette recorder A rewinding/reproducing signal is generated from the auto rewinding/reproducing key 20 and inputted into a micro computer 24 in a system control part. When looking at/listening to the video tape are finished, and an end signal is inputted into the micro computer 24, and converted into a second rewinding signal with the micro computer 24. When the video tape is rewound, a second start signal, sensed the starting point of the tape again with a start sensor 22, is generated. A motor is stopped to drive with a capstan motor driver 26 to stop the video tape due to the second start signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video cassette recorder, and more particularly to a video cassette recorder having an automatic rewind / playback function.

[0002]

2. Description of the Related Art Generally, video cassette recorders have
UTO REPEAT function, PA
USE / STILL (pause) function, G-CODE
(G code) We are pursuing what makes the video cassette recorder more convenient by adding a simple reservation function such as reservation. A conventional video cassette recorder has a rewind key and a play key, respectively. When using such a conventional video cassette recorder, the user prepares a tape containing a desired program and mounts it on the video cassette recorder. Next, after confirming that the tape is at the start position, the play key of the video cassette recorder is pressed to operate the video cassette recorder. If the tape is not rewound, the user will watch the program from the middle of the tape.

FIG. 1 is a block diagram showing the rewinding and reproducing operations in a conventional video cassette recorder. When the video tape is in the middle position, after the video tape is put in the video cassette recorder, the rewinding key 10 of the key array unit is pressed to watch the video tape from the first scene. Then, a rewind signal is generated from the rewind key 10 and transmitted to a microcomputer (hereinafter, referred to as "microcomputer") 12 of a system controller unit (hereinafter, referred to as "syscon unit") that checks and controls various system states. To be done. In the microcomputer 12, a control signal for controlling the capstan motor driver 14 is generated according to the state of the rewind key.
The rewinding control signal is the capstan motor driver 14
Drives a tape by driving a capstan motor (not shown) at a constant speed. The capstan motor driver 14 rotates the capstan motor at a constant speed so as to match the mode by the rewinding control signal from the microcomputer 12, thereby driving the pinch roller of the video cassette recorder to rewind the video tape. . When the video tape is rewound to the starting point, the tape leader (le) attached to the starting point of the video tape
The starter 16 that optically detects the ader) section using a photo diode detects the signal and outputs a signal to the microcomputer 12
Send to. Then, the microcomputer 12 sends a stop command to the capstan motor driver 14 according to the signal from the start sensor 16. The capstan motor driver 14 stops the capstan motor in response to the stop command signal to prevent the tape from being rewound and protects the tape.

Then, when the user presses the play key 18 to view the program, the state of the play key 18 is transmitted to the microcomputer 12. On the other hand, the cam switch 17 operates the LC motor driver 15 which determines the mode of the deck for storing the current video tape, and D
The eck is switched to the play mode so that the capstan motor driver 14 drives the motor at a constant speed adapted to the play mode, thereby driving the pinch roller. On the other hand, the microcomputer reproduces the video tape by driving the audio circuit, the video circuit, etc. by the reproduction signal.

[0005]

The conventional video cassette recorder described above is very inconvenient because it waits until the video tape is rewound to the starting point and then the reproduction key is pressed to operate it. In addition, in a person who operates a large number of video cassette recorders or in a sales office, such an operation takes time, which is also a factor of increasing labor costs.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic rewinding / reproducing function in which the tape is rewound to the starting point and automatically reproduced when the user presses the key once. It is to provide a video cassette recorder. The video cassette recorder of the present invention includes a rewinding / reproducing key that generates a rewinding / reproducing signal in response to a user's command, a start sensor that detects a starting point of a tape and generates a start signal, and the rewinding / reproducing signal. Receiving the start signal to generate a rewind command signal, and receiving the start signal to generate a reproduction control signal, and the rewind and reproduction control signal of the microcomputer to determine the Dec mode.
C motor driver, a cam switch for transmitting the current Deck state to the microcomputer, a capstan motor driver for driving the tape at a constant speed by the rewinding control and reproduction control signals of the microcomputer, receiving the reproduction control signal It is characterized in that it includes an audio / video circuit for reproducing audio and / or video signals of the tape.

According to a preferred embodiment of the present invention, the video cassette recorder further includes an end sensor for detecting the end of the tape and generating an end signal, and means for generating the rewinding control signal according to the end signal. be able to. In addition, the video cassette recorder may further include a display reproducing unit for displaying a user command and a video operating state according to the user command signal. When the tape is rewound by the rewind / playback signal, the start signal is detected at the start position. The start signal causes the microcomputer to generate the reproduction signal so that the tape is automatically reproduced. Therefore, the user can press the key once to automatically rewind the tape and replay the tape from the beginning, which makes the use of the product more convenient.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the accompanying drawings. FIG. 2 is a block diagram for explaining a video cassette recorder having an automatic rewinding and reproducing function according to an embodiment of the present invention. The video cassette recorder shown in the figure has a rewinding / reproducing key 20 for generating a rewinding / reproducing signal in response to a user's command, and a start sensor 2 for sensing a starting point of a tape and generating a start signal.
2. A microcomputer 24 that receives the rewinding / reproducing signal to generate a rewinding command signal and receives a start signal to generate a play control signal, and a deck for storing a tape according to the rewinding control and reproducing control signal of the microcomputer. LC motor driver 25 for controlling modes, above Dec
In response to the cam switch 27 for transmitting the current state of k to the microcomputer, the capstan motor driver 26 for driving the tape at a constant speed according to the rewinding control and playback control signal of the microcomputer, and the playback control signal. It includes audio / video circuitry 28 for reproducing the audio and / or video signals of the tape. Further, the video cassette recorder includes an end sensor 32 which detects the end point of the tape and generates an end signal.
The end signal is input to the microcomputer 24 and converted into a rewind signal. Also, the display unit 30 is provided for displaying the user command and the video operating state according to the user command signal.

The operation of the video cassette recorder according to the present invention will be described in detail below. After inserting the video tape whose tape is rolled up into about 1/2 into the video cassette recorder, press the auto rewind / playback key 20 in the key array section. Then, a rewind / playback signal is generated from the auto rewind / playback key 10 and input to the microcomputer 24 of the syscon unit. The system controller is equipped with a microcomputer 24 to check the system status of the video cassette recorder and generate a control signal according to a user's command. The state of the Deck is transmitted to the microcomputer 24 through the cam switch 27. The signal input to the microcomputer 24 is the microcomputer 2
At 4, the rewinding control signal is converted and transmitted to the capstan motor driver 26. A motor (not shown) of the capstan motor driver 26 is driven by the input rewinding control signal at a speed suitable for rewinding the tape, thereby driving a pinch roller to rewind the tape. At this time, the display section 30 indicates that the tape is in the rewinding state. When the video tape is rewound to the starting point, the start sensor 22 senses the leader of the tape attached to the starting point of the video tape by the photo diode and generates a start signal. The generated start signal is input to the microcomputer 24 and converted into a reproduction signal. that way,
The video cassette recorder generates a rewind stop signal while switching to the reproduction mode, and transmits the rewind stop signal to the capstan motor driver 26 to stop the drive motor and stop the tape rewind operation. The microcomputer 24
It is desirable to configure so that only one start signal sensed after the rewinding operation is converted into a reproduction signal.
Next, the microcomputer 24 sends a reproduction control signal to the capstan motor driver 26 by the reproduction signal to drive the motor so as to be wound at a speed suitable for tape reproduction, thereby driving the pinch roller at a constant speed.

On the other hand, the microcomputer 24 is operated by the reproduction signal.
Also drives the audio / video circuit 28 or the like to reproduce a video tape. At this time, the display unit 30
Displays the status that the video cassette recorder is operating. In addition, the LC motor driver 25 is driven by the rewinding control signal and the reproduction control signal of the microcomputer 24
Control the mode of eck. When you're done watching the videotape, watch the transparent end of the videotape.
At r portion), an end signal is generated by the photodiode of the end sensor 32. The end signal is input to the microcomputer 24 and converted from the microcomputer 24 into a second rewind signal. The second rewind signal drives the motor of the capstan motor driver 26 again to rewind the video tape. When the video tape is rewound, the starting point of the tape is sensed by the start sensor 32 again and a second start signal is generated. The second start signal is a second signal, which causes the capstan motor driver 26 to stop driving the motor and stop the video tape as in the conventional video cassette recorder.

[0011]

When the above-mentioned video cassette recorder of the present invention is used, a large number of VCRs can be operated by one person, which is convenient. This can save labor costs at a video store where one person has to operate many video cassettes. In addition, even at home where one cassette recorder is used, if the user presses only one key, the tape is automatically rewound and the tape can be played back from the starting point, which makes the use of the video cassette recorder more convenient. Although the present invention has been specifically described based on the above-described embodiments, the present invention is not limited to this, and modifications and improvements can be made within the scope of ordinary knowledge of those skilled in the art.

[0012]

[Brief description of drawings]

FIG. 1 is a block diagram showing a rewinding and reproducing operation in a conventional video cassette recorder.

FIG. 2 is a block diagram for explaining a video cassette recorder having an automatic rewinding and reproducing function according to the present invention.

[Explanation of symbols]

 20 Rewind / Play Key 22 Start Sensor 24 Microcomputer 26 Capstan Motor Driver 28 Audio / Video Circuit 30 Display 32 End Sensor

Claims (3)

[Claims] 1. A means for generating a rewinding / reproducing signal in response to a user's command; a start sensor for sensing a starting point of a tape to generate a start signal; a rewinding control signal receiving the rewinding / reproducing signal. To generate a playback control signal in response to the start signal; a capstan motor driver for driving the tape at a constant speed by the rewinding control or playback control signal of the microcomputer; An audio / video circuit for reproducing the audio and / or video signal of the tape, wherein when the tape is rewound by the rewinding / reproducing signal, the start signal is detected at a start position and the reproducing signal is generated. A video cassette recorder having an automatic rewinding and reproducing function characterized in that the above-mentioned tape is automatically reproduced. Order. 2. The video cassette recorder further comprises an end sensor for detecting an end point of a tape and generating an end signal, and means for generating the rewinding control signal according to the end signal. A video cassette recorder having the automatic rewinding and reproducing functions described. 3. The automatic winding apparatus according to claim 1, wherein the video cassette recorder further includes a display unit for displaying the user's command according to the user's command signal and a video operating state. Video cassette recorder with return and playback functions.