JPH0471266B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape cassette holding device in a cassette tape recorder.

BACKGROUND OF THE INVENTION Generally, in a cassette tape recorder, a cassette lid body rotatably supported on a tape recorder body is biased by a spring in the opening direction, and is mechanically locked when the lid is closed.

In this case, it is necessary to apply an urging force to the tape cassette toward the tape recorder body, and the cassette lid is often equipped with a tape cassette holding device provided with a holding spring for holding the tape cassette.

As shown in FIGS. 8 to 10, the conventional tape cassette holding device includes a pair of ribs 3, 3 provided on a jetty 6 of a cassette lid body 2 rotatably supported on a tape recorder body. A presser spring 4 made of a wire bent into a ring shape is inserted into a groove formed between the pair of guide ribs 3 and 6, and the overlapping portion 1 at both ends of the presser spring 4 is inserted between the pair of guide ribs 3 and 3.
By engaging with the engagement rib 5 protruding between the cassette cover 2 and the cassette cover 2, the presser spring 4 is prevented from coming off, and the overlapping portion 1 is received by a pair of receiving ribs 7, 7 protruding from the cassette lid 2. This prevents both ends of the presser spring 4 from being caught on the inner surface of the cassette lid 2.

Problems to be Solved by the Invention However, in such a conventional configuration, the presser spring 4 and the cassette lid body 2 do not have a rotation prevention mechanism, so the tape cassette may be attached and detached several times, or the tape cassette may be moved in the direction of the arrow a with a finger. When side pressure is applied, the presser spring 4 rotates in the direction of arrow a, and as shown in FIG. 7 and the guide rib 3, causing a problem in that the springiness is lost when pressed in the direction of arrow b.

Also, the end portion 9 of the overlapping portion 1 of the presser spring 4
There is a problem in that the retaining spring 4 easily comes off from the engaging rib 5, and when pulled in the direction of arrow c, the presser spring 4 easily comes off.

Means for Solving the Problems The tape cassette holding device of the present invention has a presser spring formed by bending a wire rod into a coil shape so that the ends overlap each other, and a jetty projecting from the inner surface of the cassette lid, and a pressing spring provided on the jetty. the presser spring is inserted into the concave groove between the pair of guide ribs, and the overlapping portion of the presser spring is engaged with an engagement rib provided on the jetty between the pair of ribs for preventing movement of the presser spring in the insertion direction, The presser spring is provided with bent portions located on the side surfaces of the engagement rib at both ends thereof.

Function: In the tape holding device of the present invention, since the circular holding spring has bent portions located on the side surfaces of the engagement ribs for preventing movement in the spring insertion direction at both ends, when the holding spring is attempted to rotate. When the tape cassette is pulled, the bend hits the side wall of the engaging rib, preventing it from rotating and coming off, so that the tape cassette can be held down with a stable holding force at all times.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

A first embodiment of the present invention will be described with reference to FIGS. 1 to 3. The presser spring 4 is a ring-shaped spring made by bending a spring wire material into a circle, and both ends 10 of the overlapping portion 1 of the spring are bent toward the center of the circle.

This presser spring 4 is a spring 4 as shown in FIG.
A jetty 6 of the cassette lid body 2 and a pair of guide ribs 3, 3 formed on the jetty 6 are shown from the overlapping portion 1 side.
1, and the overlapping portion 1 of the spring is engaged with the rib 5 for preventing movement in the spring insertion direction, as shown in FIG. Furthermore, the bent portion 1 in the direction of the center of the circle
0 and 10 are located on the side surface of the movement prevention rib 5. Therefore, even if force is applied to the presser spring 4 in the rotation direction and the tension direction, the bent portion 10,
10 hits the side wall of the movement prevention rib 5 and can prevent the presser spring 4 from rotating and coming off.

4 to 7 show other embodiments of the present invention, in which one or both sides of the bent portions 10, 10 of the presser spring 4 are directed outward from the circular center of the spring, or outward and inward. It is bent in the radial direction, and has a structure that functions similarly to the above embodiment.

Effects of the Invention As described above, according to the tape cassette holding device of the present invention, the holding spring, which is made by bending a wire rod into a coil shape so that its ends overlap each other, is used as a jetty protruding from the inner surface of the cassette lid. The presser spring is inserted into a groove between a pair of guide ribs provided on the jetty, and the overlapping portion of this presser spring is engaged with an engagement rib provided on the jetty between the pair of ribs to prevent the presser spring from moving in the insertion direction. The presser spring has bent portions located on the sides of the engaging rib at both ends, so that the presser spring will not come off even if force is applied to the presser spring in the rotational direction or the pulling direction.
A stable pressing force can always be applied to the tape cassette, which is extremely advantageous in practice.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a tape cassette holding device of the present invention, Fig. 2 is an assembled perspective view of the same device, Fig. 3 is a perspective view of a cassette tape recorder, and Fig. 4 is a perspective view of another embodiment of the invention. 5 is an assembled perspective view of the same device, FIG. 6 is a perspective view of still another embodiment of the present invention, FIG. 7 is an assembled perspective view of the same device, and FIG. 8 is a conventional tape cassette holder. A perspective view of the device, FIGS. 9 and 10 are assembled perspective views of the device. 1...Overlapping portion, 2...Cassette lid body, 3
... Guide rib, 4 ... Presser spring, 5 ... Engagement rib for preventing movement, 10 ... Bending portion.

Claims (1)

[Claims] 1. Insert a presser spring made by bending a wire rod into a ring shape so that its ends overlap each other into a groove between a jetty protruding from the inner surface of the cassette lid and a pair of guide ribs provided on this jetty, and The overlapping portions of the springs are engaged with engagement ribs provided on the jetty between the pair of ribs for preventing movement of the presser spring in the insertion direction, and both ends of the presser spring are attached to the side surfaces of the engagement ribs. 1. A tape cassette holding device characterized by having a bent portion for positioning.