JPS63100655A - Cylinder fitting device - Google Patents

Abstract

PURPOSE:To secure the accuracy of the relative position between a cylinder and a cassette and to reduce costs by integrally forming guide pins positioning when a tape cassette is loaded on a cylinder fitting base. CONSTITUTION:The guide pins 2 and 2a position the tape cassette 5 placed on a chassis 3 in the direction of XY, while the guide pins 2, 2a, 2b, 2c position it in the height direction. A pull-out member 7 pulls the tape 6 out of the cassette 5, which roughly comes into contact with the cylinder 4 loaded onto the cylinder fitting base 1 fixed on the chassis 3 with a screw. Hence a signal is transmitted and received. Since the guide pins are integrally formed on the fitting base 1, the side of the chassis 3 requires no guide pin. Consequently, compared with the constitution that guide pins are fitted to the side of the chassis, no cumulative assembly error occurs, thereby easily securing accuracy, Moreover the man-hour can be reduced to reduce the costs.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is magnetic recording and reproducing! The present invention relates to a cylinder mounting device suitable for use in a household VTR, in particular.

[Conventional technology]

In household VTRs, a method is generally used in which a cylinder 4 containing a rotating magnetic head is fixed to a cylinder mounting base 1, and this is fixed to a chassis 5, as shown in FIG. Also, place the tape cassette 5 on the chassis 3.
t, to the cylinder 4 [The positioning of the tape cassette 5 during recording and reproduction is performed by a guide pin 2, which is a separate piece, and which is installed in the chassis 5 or the like. Therefore, cylinder mounting base 1. In addition to the chassis 3, a guide pin 2 is required.

Further, as shown in FIG. 4, during recording/reproduction, a tape 6 pulled out from a tape cassette 5 is attached to the cylinder 4 and is run to exchange signals. The relative positional accuracy of the tape cassette 5 and the tape cassette 5 is very important for tape running.

[Problem that the invention seeks to solve]

As mentioned above, in the conventional example, the cylinder mounting base.

A guide pin is required in addition to the chassis, which poses an obstacle to reducing the number of parts by 11j and reducing costs.

In addition, in order to ensure relative positional accuracy between the cylinder and tape cassette, not only the dimensions of each individual component but also the mounting and fixing must be highly accurate. The drawback was that it had to be maintained.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a cylinder device that is low in cost and provides a highly accurate mechanism v4 configuration.

[Means for resolving the problems] In order to achieve the above object, the present invention has a configuration in which a guide pin for positioning a tape cassette is integrally molded on a cylinder mounting base on which a cylinder is placed.

[Effect]

Since the guide pin is integrally molded into the cylinder mounting base,
There is no need for a separate piece of guide pin, reducing the number of parts and cost by OT.

In addition, the relative positional accuracy of the cylinder and tape cassette is improved because the cylinder mounting part and guide pin are integrally molded.
By ensuring relative dimensional accuracy between the two, it is easy to
Furthermore, stable dimensional accuracy can be ensured.

〔Example〕

EMBODIMENT OF THE INVENTION One embodiment of the present invention will be described using FIGS. VM1 to 3.

FIG. 1 is a perspective view of the cylinder mounting base, FIG. 2 is an exploded perspective view of the main parts of the VTR mechanism, and FIG. 5 is a plan view of the main parts of the VTR machine f register. In the figure, the tape cassette 5 placed on the chassis 6 is positioned in five dimensions by the guide pin 2 and the other kite bins 28.2b and 2C. Pulling out member 7 from the positioned tape cassette 5
a.

The tape 6 is pulled out by 7b and attached to the cylinder 4 to transmit and receive signals. The cylinder 4 is tilted at a predetermined angle and attached to a cylinder mounting base 1, and the cylinder mounting base 1 is fixed to the chassis 3 with screws.

As shown in FIG. 1, the above-mentioned guide pin 2 is integrally molded on the cylinder mounting base 1, and the guide pin 2 is not required on the chassis 3 side.

Also, as mentioned above, ff1t! of tape cassette 5! Positioning is performed using guide pins 2t 2aa 2b, 2c. However, positioning in the X and Y directions is performed using guide pins 22a, and positioning in the height direction is performed using guide pins 2+ 2".
e 2b, 2C. Here, what is important for the load when the tape is running as shown in FIG.
The relative positional accuracy of the dimension in the height direction of the guide pin 20 force set mounting surface 24 closest to and the dimension in the height direction of the cylinder a mounting surface 14 is important. As shown in Fig. 1, since the guide pin 2 and the cassette a mounting surface 2a are integrally molded on the cylinder mounting base 1, cumulative assembly errors can be ignored compared to the conventional configuration in which the guide pin is mounted on the chassis side. It also makes it easier to manage accuracy.

〔Effect of the invention〕

According to the present invention, the guide pin can be removed from the number of parts;
Since the number of assembly steps can also be reduced, it is effective in reducing costs.

Furthermore, it is easy to ensure relative positional accuracy between the cylinder and the tape cassette, and it is also easy to manage the degree of sliding.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a cylinder mounting base according to an embodiment of the present invention;
2 is an exploded perspective view of a main part of a VTR mechanism according to an embodiment of the present invention, FIG. 3 is a plan view of a main part of a VTR mechanism according to an embodiment of the present invention, and FIG. 4 is a conventional VTR- →A plan view of the main parts of the structure. FIG. 5 is an exploded perspective view of the main parts of the conventional VTR4 structure. 1... Cylinder mounting base 2... Guide pin 5... Tape cassette

Claims (1)

[Claims] 1. A cylinder mounting device for a magnetic recording and reproducing device, characterized in that a guide pin for positioning when a tape cassette is placed is integrally molded on a cylinder mounting base on which the cylinder is mounted.