JPS6338464Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a video tape cassette.

This kind of conventional video tape cassette has a first
As shown in FIGS. 3 to 3, in order to protect the pull-out portion T' of the magnetic tape T on which the loading post is hung during loading, a spring 2 The lid 3 is provided with a roughly U-shaped lid 3 which has the ability to rotate in the closing direction (left rotation direction in Fig. 2), and when not loaded, the lid 3 is closed by the action of the spring 2 to cover the drawer portion T'. The inner small protrusion 3b of the support arm 3a of the lid 3 is locked by the locking pawl lever 4 (which is pivotally attached to the outer surface 1a of the shell 1 and is provided with right-handed turning ability in FIG. 2 by the spring 2). This allows the closed state to be maintained even when subjected to impact, etc., and when loading, the lower end of the locking claw lever 4 is pushed by the relative movement of the fixed lever 5 on the deck side when inserting the cassette. The lock lever 4 is rotated to the left in FIG. 2 to release the lock from the lid 3, and the movable pin 6 on the deck side is raised and pressed against the lower edge of the side of the lid 3, thereby moving the lid 3 as shown in FIG. It was constructed so that it could be rotated to the right, that is, opened, to expose the drawer portion T'. However, in this tape cassette, in order to arrange the locking claw lever 4, a predetermined gap is formed between the outer surface 1a of the shell 1 and the inner surface of the support arm 3a of the lid 3, as shown in FIG. Since a fairly wide gap A is provided,
For example, if a strong force is applied from the direction of arrow B in Figure 3, the lid 3 will be greatly deformed and may eventually exceed its elastic limit and be permanently deformed or destroyed, resulting in the loading of the deck The problem was that it became impossible.

In view of the above problems, the present invention provides a video tape cassette in which a projection slightly shorter than the width of the gap is provided on the inner surface of the support arm of the lid so that the lid will not be permanently deformed even when subjected to strong force. However, the following description will be made based on the embodiment shown in FIG.
A protrusion 3c that is slightly shorter than the gap A is provided on the inner surface of the shell 1 at a position where it does not interfere with the fixed lever 5. Only a narrow gap C exists. Therefore, even if a strong force is applied from the direction of arrow B in FIG. 4, the head end surface of the protrusion 3C immediately comes into contact with the outer surface 1a of the shell 1, thereby suppressing the deformation of the lid 3 in small steps, that is, within the elastic limit. Since we want to make sure that there is
Permanent deformation or destruction of the material can be reliably prevented. In the above explanation, the protrusion is provided on the inner surface of the support arm 3a, but it may also be provided on the outer surface 1a of the shell to form a gap C between it and the inner surface of the support arm. good.

As mentioned above, the video tape cassette according to the present invention has an important practical advantage in that even if the lid is subjected to strong forces, permanent deformation or destruction of the lid is reliably prevented.

[Brief explanation of the drawing]

1 to 3 are respectively a perspective view, a side view, and a bottom view of a conventional video tape cassette, and FIG. 4 is a bottom view of an embodiment of a video tape cassette according to the present invention. 1... Ciel, 2... Spring, 3... Ritsudo, 3
a...Support arm portion, 3b...Small protrusion, 3c...Protrusion, 4...Latching claw lever, 5...Fixing lever, 6
...Moving pin.

Claims (1)

[Scope of utility model registration request] In a video tape cassette, a predetermined gap is provided between the outer surface of the shell and the inner surface of the support arm of the lid pivotally connected to the outer surface, the outer surface of the shell or the inner surface of the support arm. A video tape cassette characterized in that a protrusion slightly shorter than the width of the gap is provided on the top.