JPS6314350A - Program search mechanism for magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To bring a position of video recording start close to the reproduction start position after program search by providing the 2nd reproducing head arranged closely to a recording head on the tape running system in the reproducing state and detecting a program search signal recorded by the recording head. CONSTITUTION:In case of the video recording, the tape is moved from the stop state 2 into the reproducing state 1, and a video signal is recorded by a drum 5, and in this case, a program search signal is recorded by a program search recording head 3 for several seconds at the video recording start. In applying the program search for the recorded tape depending on the content, at first the fast feed/rewinding is applied at the halt state 2, the program search signal is detected by the 1st reproducing head 4a and the tape is stopped at that point of time. After the tape is brought into the reproducing state 1, the tape is rewound and the program search signal is detected by the 2nd reproducing head 4a, and the tape is fed forward to apply the conventional reproduction. Thus, the video recording start position and the reproducing position are made nearly the same to apply program search with high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cueing mechanism used in a magnetic recording/reproducing device, and particularly to improving the positional accuracy of cueing.

[Conventional technology]

FIG. 2 shows a conventional cueing device for this type of device.

In the figure, 1 represents the tape running state in the tape playback or recording mode (hereinafter referred to as the playback state), and 2
represents the tape running state (hereinafter referred to as the stopped state) in the tape stop, fast forward, one rewind mode. Reference numeral 3 denotes a magnetic erasing head which is provided in contact with the tape in the playback state and has the function of recording a cue signal on the tape (hereinafter referred to as a cue recording head). 4a is a head (hereinafter referred to as a first playback head) that detects the cue signal recorded by the cue recording head 3;

It is installed between the cassette and the tape of stop state B2, and is in contact with the tape in stop state 2. 5 is a drum for recording and reproducing video signals on tape.

6 records audio signals and control signals.

The bamboo head to be played, 7 is a cassette case.

Next, the operation will be explained. First, when recording in a magnetic recording/reproducing apparatus, the tape is moved from stop state 2 to play state 1, and a video signal is recorded by drum 5. In this case, a cue signal is recorded by the cue recording head 3 for several seconds before recording starts. When searching the beginning of a tape recorded according to the above-mentioned contents, first, fast forwarding and rewinding are performed in the stop state 2, and the first reproducing head 4a detects the beginning signal and stops the tape. By playing back from this state, it is possible to play back from the recording start position.

[Problem that the invention seeks to solve]

Since the conventional cueing mechanism is configured as described above,
There is a problem in that the recording start position and the playback start position after cueing are misaligned.

This invention was made in order to solve the above-mentioned problems, and it is possible to bring the recording start position closer to the playback start position after cueing, and it also uses a magnetic material that allows cueing even in the playback state. The purpose of this invention is to obtain a cueing mechanism for a recording/playback device.

[Means for solving problems]

The cueing mechanism according to the present invention includes a second playback head that is placed close to the recording head on the tape running system in the playback state and detects a cueing signal recorded by the recording head.

[For production]

The cueing mechanism in this invention has a second playback head near the first cue recording head, so that after loading the tape, the tape is fed backwards and the second playback head detects the cueing signal. You can move the recording start position and playback start position closer together.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a diagram of the cueing mechanism in Figure 1.

1 represents the tape running state in the tape playback or recording mode (hereinafter referred to as the playback state), and 2 represents the tape running state in the tape stop, fast forward, 1 rewind mode (hereinafter referred to as the stop state).

Reference numeral 3 denotes a magnetic erasing head which is provided so as to be in contact with the tape in the reproduction state 1, and has the function of recording a cue signal on the tape (hereinafter referred to as a cue recording head).

A head 4a (hereinafter referred to as the first playback head) detects the cue signal recorded by the cue recording head 3, and is installed between the cassette and the tape in the stopped state 2, and is in contact with the tape in the stopped state 2. It's Nishide. 5 is a drum for recording and reproducing video signals on tape, 6 is an AI (2 heads) for recording and reproducing audio signals and flight control signals, and 7 is a cassette case. 4b is the cue recording head 3.
This head 4b is installed near the cue recording head 3 and is in contact with the tape in the playback state 1.

Next, the operation will be explained. First, when recording in a magnetic recording/reproducing apparatus, the tape is moved from stop state 2 to play state 1, and a video signal is recorded by drum 5. In this case, a cue signal is recorded by the cue recording head 3 for several seconds before recording starts. When searching the beginning of a tape recorded according to the above-mentioned contents, first, fast forwarding and rewinding are performed in stop state 2, and the tape is stopped when a beginning signal is detected by the first playback head 4a. When reproduction is performed from this position, the position of the cue signal recorded by the cue recording head 3 is approximately at the position of the Mc head 6, and as a result, a shift of more than ten centimeters occurs between the recording start position and the playback start position.

Here, after the first playback head 4a performs cueing and puts the tape in playback state 1, the tape is fed backwards and when the cueing signal is detected by the second playback head 4b, the tape is fed forward. to perform normal playback. As a result, the recording start position and the playback position are almost the same, making it possible to cue with high precision. Since the second playback head 4b can be detected in the playback state 1 in this way, the second playback head 4b can be detected in the playback state 1.
You can also find the cue by fast forwarding and rewinding one reel.

This saves loading and unloading time, allowing for speedy cueing.

〔Effect of the invention〕

As explained above, according to the present invention, a second playback head is provided near the cue recording head, and after loading the tape, the tape is reversely fed and the second playback head outputs a cue signal. Since this feature allows detection, the recording start position and the playback position are at the same position, allowing for highly accurate cueing.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a cue mechanism of a magnetic recording/reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional cue mechanism. 1... Playing state, 2... Stopping state, 3... Cue recording head, 4a... First playback head, 4b...
Second playhead. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A recording head for recording cue signals, fast forwarding,
a first playback head that is installed on the tape running system in a rewinding state and detects a cue signal recorded by the recording head; and a second playback head that detects a cue signal recorded by the first playback head in a fast forward or rewind state, and after loading the tape, the first playback head detects the cue signal recorded by A cueing mechanism for a magnetic recording and reproducing apparatus, characterized in that a cueing signal recorded by a recording head is detected by a second reproducing head by reversing the recording head.