JPH0697550B2 - Tape cassette - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a newly proposed tape cassette for digital audio.

2. Description of the Related Art In recent years, digital audio tape cassettes have been proposed and commercialized.

The proposed new tape cassette will be described below with reference to the drawings.

FIG. 7 is a top perspective view of the proposed tape cassette, in which 1 is a cassette body, 2 is a rotating lid for rotating and opening the front opening, and 3 is a sliding opening in the bottom of the cassette body. A sliding lid that opens and closes and is locked at the opening and closing 2 position is always spring-biased in the closing direction. Reference numeral 4 is a notch provided at the lower edge of the rotary lid 2, and the front edge of the sliding lid 3 is seen inside the notch. Reference numeral 5 is also a notch provided on the lower edge of the rotary lid 2, and communicates with a slide lid locking release projection guide groove provided on the lower surface of the slide lid 3.
FIG. 8 is a bottom perspective view thereof. In the figure, 6 is an unlocking projection guide groove, 7 and 8 are locking holes, and 9 is a locking claw provided at the tip of an elastic arm formed integrally with the cassette body 1 on the lower surface of the cassette body 1. , Always urged outward. FIG. 9 is a side view showing an open state of the sliding lid 3 and the rotating lid 2, and FIG. 10 is a side sectional view of the unlocking projection guide groove portion.

In use, the tape cassette constructed as described above is normally inserted into the cassette holder with the rotating lid 2 as the front side, and the locking claw 9 is pushed up by the sliding lid locking release projection provided in the cassette holder. Then, the locking to the closed position is released, and the sliding lid comes into contact with the sliding lid opening protrusion and stays there at the subsequent insertion, and only the cassette body is further inserted to release the sliding lid. , Complete the insertion in the fully opened state. From this state, the cassette holder moves to the playing position together with the tape cassette, and the rotating lid is opened during the movement. When removing the cassette, the cassette holder is returned from the playing position to the position at the time of insertion, and the tape cassette is pushed out or taken out to release the lock of the sliding lid to the open position and the return force. To be closed.

Problems to be Solved by the Invention However, in the above-described configuration, the sliding lid can be smoothly returned to the closed position while being used due to warpage and deformation of components, wear of sliding portions, fatigue of springs, and the like. Some are gone. When such a tape cassette is used, there is a problem in that the sliding lid remains open in the taken-out state, which is not preferable for protecting the tape.

In view of the above problems, the present invention provides a cassette holder in which the sliding lid is always closed when the tape cassette is taken out from the cassette holder.

Means for Solving the Problems In order to solve the above problems, the tape cassette of the present invention has a sliding lid that is opened and closed by sliding the bottom opening and is locked at both open and closed positions, and a lower surface of the sliding lid. It is provided with a structure called a lock release projection guide groove bottom surface having an uneven surface.

Operation According to the present invention, the sliding lid locking release projection is made of a soft elastic high friction material such as rubber and is higher than the depth of the locking release projection guide groove on the cassette holder side. By forming it so that it abuts on the bottom of the guide groove, not only is the lock released, but the slide lid is temporarily locked and held when the tape cassette is removed from the cassette holder, and the slide lid is completely removed. It will be taken out in a closed state.

Example A tape cassette according to an example of the present invention will be described below. FIG. 1 shows a side cross section of a lock release projection guide groove portion of a tape cassette according to a first embodiment of the present invention. In FIG. 1, reference numeral 10 denotes an uneven surface provided on the bottom surface of the unlocking projection guide groove 6. FIG. 2 is a bottom view thereof.

With this configuration, the engagement with the lock release projection formed of a soft elastic and high friction material such as rubber is ensured, and the sliding lid can be reliably closed when the cassette is taken out.

FIG. 3 shows a partial side cross-section of the second embodiment of the present invention, in which the concave and convex shapes are serrated to reduce the frictional engagement force when the tape cassette is inserted and to reduce the frictional engagement force when the tape cassette is taken out. It is made larger so that it can be closed more reliably.

FIG. 4 is a bottom view of a side surface of the unlocking projection guide groove having an uneven surface, and it is also attempted to utilize abutting engagement with the side surface of the unlocking projection made of a soft elastic high friction material such as rubber. To do. FIG. 5 is a side sectional view thereof.

FIG. 6 is a bottom view of the case where both the bottom surface and the side wall surface are uneven.

In the drawings, the uneven surface is formed by a plurality of linear unevenness orthogonal to the length direction of the guide groove 6, but the invention is not limited to this. Is also good.

EFFECTS OF THE INVENTION As described above, according to the present invention, a sliding lid that opens and closes a bottom opening by sliding and is locked at both open and closed positions, and an unlocking protrusion guide in which an uneven surface is formed on the lower surface of the sliding lid. By providing the groove bottom surface, when used in a cassette holder having a sliding lid locking release projection formed of a soft elastic and high friction material such as rubber, the sliding lid can be reliably closed when the cassette is taken out.

[Brief description of drawings]

FIG. 1 is a side sectional view of an unlocking projection guide groove portion of a tape cassette according to the first embodiment of the present invention, FIG. 2 is a bottom view thereof, FIGS. 3, 4, 5, and 6 FIG. 7 is a bottom view and a side sectional view of another embodiment, FIG. 7 is a top perspective view of the proposed tape cassette, FIG. 8 is a bottom perspective view thereof, and FIG. 9 is a sliding lid and a rotating lid. FIG. 10 is a side view showing an open state, and FIG. 10 is a side sectional view of the unlocking projection guide groove portion. 1 ... Cassette body, 2 ... Rotating lid, 3 ... Sliding lid, 6
…… Lock release projection guide groove, 7,8 …… Lock hole, 9 …… Lock claw, 10,11,12 …… Rough surface.

Claims (3)

[Claims] 1. A slide lid for opening and closing a bottom opening by sliding to be locked at both open and close positions, and a lock release projection guide groove bottom surface having a concave and convex surface on the bottom surface of the slide lid. Tape cassette characterized by. 2. The tape cassette according to claim 1, wherein the uneven surface is formed by a plurality of linear unevenness parallel to a direction orthogonal to the length direction of the unlocking projection guide groove. 3. The tape cassette according to claim 2, wherein streak-shaped irregularities are formed from the bottom surface of the unlocking projection guide groove to the side wall of the groove.