JPS61284855A - Video tape recorder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cassette type video tape recorder.

BACKGROUND OF THE INVENTION In recent years, video tape recorders have become rapidly popular, but there is a demand for not only improved image quality but also improved operability. In addition, since it has become possible to record for long periods of time, various methods have been devised to find the location you want to watch.

The conventional video tape recorder having the above-mentioned video tape position search function will be described below with reference to the drawings.

FIGS. 4 and 6 are diagrams showing the tape state during loading and unloading of a conventional video tape recorder. In these figures, 1 is a rotating head cylinder equipped with a rotating magnetic head for recording and playback, 2 is a fixed magnetic head for recording and playback, 3 is a cassette, 4 is a video tape,
sa and sb are loading posts, 6 is a pinch roller,
7 is a capstan, sa and sb are guide rollers, 9IL
.

9b is a reel.

Regarding the conventional video tape recorder configured as described above, the entire video tape position search operation will be explained below.

First, when searching while watching the playback image, fast forward and rewind the videotape at the videotape position (loading state) shown in Figure 4. Loading Dapos)s
a, sb, rotating head cylinder 1, guide roller sa
, sb, fast forwarding and rewinding cannot be done very quickly in consideration of tape damage. If fast forwarding and rewinding is to be performed quickly, it is necessary to put the disc in a deotave state (unloading state) as shown in FIG. However, in this case, the reproduced image cannot be viewed. Some videotape recorders are equipped with a counter that corresponds to the rotation of the pinch roller and real time, but it is difficult to use the counter if you do not use the counter after placing the videotape in the cassette at the beginning or end of winding. It won't happen.

Counters are useless if you are searching for a videotape that has already been wound on both reels.

Problems to be Solved by the Invention As mentioned above, the conventional configuration has the disadvantage that fast-forward playback cannot be accelerated due to tape loading. In addition, when fast forwarding or rewinding in the unloading state, there is also a drawback that it is not possible to search the entire absolute position of the videotape from an intermediate state.

In view of the above-mentioned problems, the present invention forms a loading state in which only the fixed magnetic head for audio recording and playback is in contact, and uses signals from the fixed magnetic head for audio recording and playback to enable quick absolute position search of the tape. It aims to provide a tape recorder.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention brings a videotape from a cassette set at a predetermined position into contact with a rotating head cylinder and a magnetic head capable of recording and reproducing position information. and a second state in which the magnetic head is pulled out so as to be in contact with the magnetic head capable of recording and reproducing the positional information without contacting the rotary head cylinder, and In this case, the magnetic head searches for the position of the tape.

Effects of the present invention With the above-described configuration, it is possible to quickly perform fast forwarding and rewinding while obtaining positional information of the videotape, and the absolute position of the tape can be easily known.

Embodiments Hereinafter, video tape recorders according to embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a loading state during a tape position search according to an embodiment of the present invention. 1 is a rotating head cylinder, 3 is a cassette, 4 is a video tape, 51L.

6b is a loading post, 6 is a pinch roller, 7 is a cab stan, all, Bb is a guide roller, 9a, 9
b is a reel, 10 is a magnetic head for recording and reproducing audio, and 11 is a movable pinch roller for searching.

The audio recording/reproducing magnetic head 10 and the movable search pinch roller 11 are movable in conjunction with each other as clearly shown in FIG.

1'-IL/7'l? 'Ra LIT4m
-W -h -A-10'Mselfb D tears/7'l
The operation of the search mechanism of the L/4;, A-==- recorder will be explained below with reference to FIGS. 1 and 2.

FIG. 2 shows the state of the videotape and the positions of the movable pinch roller 11 and the audio recording/playback magnetic head 1o during unloading according to the present invention. roller 1
1 and the audio recording/reproducing magnetic head 10 are loaded together with the video chip 14 into a position as shown in FIG. 1 (indicated by a broken line in FIG. 2).

In this case, the video tape 4 is not loaded up to the rotary head cylinder 1.

As described above, according to the present embodiment, the magnetic head 1o for audio recording and reproduction enables quick fast forwarding and rewinding while detecting prerecorded position information and because loading is smooth. The absolute position of the tape can be easily determined.

FIG. 3 shows the state during normal image recording and reproduction, in which case the movable pinch roller 11 functions as a guide roller. Furthermore, if the audio recording/reproducing magnetic head 1o is a video tape recorder having a rotary head for audio on the rotary head cylinder 1, it may be a magnetic head dedicated to position search.

If this is not the case, the location information and audio will be multiplexed and recorded.

Effects of the Invention As described above, according to the present invention, it is possible to obtain the excellent effect that the absolute position of the tape can be quickly found.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the search mode state of the embodiment of the present invention, FIG. 2 is a schematic diagram showing the unloading state of the embodiment, and FIG. 3 is the reproduction and recording state of the embodiment. FIGS. 4 and 6 are schematic diagrams showing the loading state and unloading state of the conventional example. 1... Rotating head cylinder, 3...
Cassette, 4...Video tape, SA, SB.
... Loading post, 6 ... Pinch roller, 7 ... Capstan, 10 ...
・Magnetic head for recording and reproducing audio, 11... Movable pinch roller for searching.

Claims (1)

[Claims] a first state in which a video tape is pulled out from a cassette set at a predetermined position so as to come into contact with a rotating head cylinder and a magnetic head capable of recording and reproducing position information;
The rotating head is configured to be able to take a second state in which it is pulled out so as to be in contact with a magnetic head capable of recording and reproducing the positional information without contacting the cylinder, and in the second state, the magnetic head moves the video A video tape recorder characterized in that it is configured to perform a tape position search.