JPS6095756A - Video tape recorder - Google Patents

Abstract

PURPOSE:To allow the titled video tape recorder to cope with both the Betamax and the VHS system cassette by arranging each drum of the Betamax and the VHS system on the same plane, detecting the system of the cassette and loading the cassette to the drum of the detected system. CONSTITUTION:The drum 1 for the Betamax system and drum 2 of the VHS system are arranged nearly on the same plane and a detecting mechanism 11 identifying the cassette 3 for the Betamax system cassette 3 and the cassette 4 for the VHS system depending on the difference in external size is provided. When the Betamax system cassette 3 is loaded, the detecting mechanism 11 identifies it, a microswitch 12 is turned off and the tape is brought into contact with the Betamax system drum 1 via tape guide pins 5-8. When the VHS system cassette 4 is loaded, the switch 12 is turned on and the cassette is brought into contact with the drum 2 via pins 9, 10. Thus, the video tape recorder is coped with any cassette of both the systems.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field and Prior Art] The present invention relates to the structure of a video tape recorder using a cassette type 172 inch wide magnetic tape.

Several methods of cassette videotapes and videotape recorders were devised during the development process, and the current standard is
= Two types are commercialized: evening type and VH8 type.

Conventionally, the Beta system and the VH8 system in this type of video tape recorder have different video recording formats on the videotape, and therefore, each system has been dedicated to each system and can only support a single system.

Therefore, a single video tape recorder can only record and play back Beta format sentences using only one of the VH8 formats. Video tape recorders had the disadvantage of not being able to record or play back.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a video tape recorder that is compatible with both Beta format cassettes and VH8 format cassettes.

[Structure of the invention]

A video tape recorder according to the present invention includes a drum having a rotating head for recording and reproducing video signals compatible with the Beta system;
■A drum with a rotary head for recording and reproducing video signals compatible with the IIS system is placed on the same plane as the cassette surface, and whether the cassette loaded in this device is for the Beta system or not. 7, and means for automatically loading a videotape.

[Explanation of Examples]

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 3.

FIG. 1 is a front view showing the positional relationship between a cassette and a drum according to an embodiment of the present invention, and FIG. 2 is a loading state of a video tape when a Beta system cassette is loaded into a video tape recorder according to the present invention. A front view showing
FIG. 3 is a front view showing the videotape loading state when a VH8 format cassette is loaded.

Figure ICk? 1 is a drum for the Beta system, and has a rotary head for recording and reproducing video signals of the Beta system. 21
This is a drum for the 1VH8 system, and has a rotating head for recording and reproducing video signals of the VH8 system.

3 is a cassette for the Beta system, and 4 is a cassette for the VH8 system. Video tapes 3a and 4a recorded or played back according to the respective systems are stored therein. 5, 6,
7, 8, 9.10 are tape guide pins, and an L/10-ding mechanism (not shown) allows the video tapes 3a, 4
a is brought into contact with a drum 1.2 having a rotary head corresponding to the respective method. Reference numeral 11 denotes a cassette-type detection mechanism, which rotates in accordance with the engagement of the outer shapes of the cassettes 3 and 4.

Reference numeral 12 denotes a microswitch, which detects whether the inserted cassettes 3 and 4 are for the Beta system or the VH8 system by turning the switch on and off as the detection mechanism 11 rotates.

As shown in FIG. 1, when #1 is loaded with a cassette 3 into this device, which has a drum 1 for the Beta system on the upper part of the same plane and a drum 2 for the VH8 system on the lower part, the detection mechanism 11 detects the cassette. It comes into contact with the side surface of 3. In this case, the microswitch 12 is turned off, and it is detected that the cassette 3 is for the Beta system. This detection result is sent to the loading mechanism by a signal to control the loading mechanism.

If the cassette 3 loaded in the recorder is for the Beta system, tape guide pins 5, 6,
7.8 brings the videotape 3a into contact with the Beta system drum l.

When a cassette 4 for the VH8 system is loaded into this device, the first detection mechanism 11 rotates in the vertical direction to turn on the microswitch 12, as shown in FIG. Based on this detection result, the loading mechanism uses tape guide pins 9 and 10 to bring the video tape 4a into contact with the VH8 system drum 2. - [Effect of the invention] As described above, according to the present invention, the drum for the beta system and the VH
By arranging the drums for the 8 formats on almost the same plane and providing means for detecting the cassette format and means for loading the videotape onto the corresponding drum, one videotape recorder can record the drums for the Beta format and the 8 format drum. It is possible to record and play back video tapes for the VH8 format.

[Brief explanation of the drawing]

1A is a front view showing the positional relationship between a cassette and a drum according to an embodiment of the present invention, and FIG. 2 is a loading state of a videotape when a Beta system cassette is loaded into a videotape recorder according to the present invention. FIG. 3 is a front view showing the videotape loading state when a VH8 format cassette is loaded. 1...Drum for Beta system 2...Drum for VH8 system 3...Cassette for Beta system 4...Cassette for VH8 system 5.6.7,8,9.10...Tape guide pin 11
...Detection mechanism 12...Microswitch applicant
NEC

Claims (1)

[Claims] In a cassette-type video tape recorder, there is a drum with a rotating head for recording and reproducing video signals for the base system, which is placed on the same plane as the cassette surface, and a VH8.
Video signal recording for the system: A drum with a rotating head for playback, a Teto that detects whether the cassette inserted into the recorder is for the Beta system or the VH8 system, and a 1. A videotape recorder comprising means for automatically loading a stored videotape onto a corresponding drum.