JPS6025741Y2 - Lid opening/closing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an opening/closing device for a cassette lid of a cassette tape recorder, etc., and is capable of reliably locking the lid even if the lid is warped or twisted.

In general, the cassette lid of a cassette tape recorder must be designed so that it will lock securely no matter what part of the lid is pressed, but the timing may be compromised due to actual warpage, twisting, or variations in the mounting position of the lid. It may not be possible to lock if it shifts or if the position you press it on is slightly off.

The present invention provides a lid opening/closing device that solves these conventional problems.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In the figure, 1 is a lid body that is rotated in the direction of arrow C in FIG. 5 is a hook board provided in the housing, 5 is a locking lever rotatably attached to the hook board 4 via a shaft 6, 7 is a claw provided at the tip of the locking lever 5, and 8 is a locking lever. This spring is suspended between the lever 5 and the hook base plate 4, and urges the locking lever 5 such that its pawl 7 always moves toward the locus of movement of the engagement protrusion 3.

Two step portions 3a and 3b as shown in FIG. 3 are formed at the corners of the engaging protrusion 3. As shown in FIG.

In the above configuration, when the lid 1 is closed in the direction of arrow B from the position shown by the solid line in FIG. The first
When rotated to the position shown by the two-dot chain line in the figure, the pawl 7 engages with the engaging protrusion 3 and becomes locked.

At this time, in order for the lid body 1 to be clamped, the corner portion 7a of the claw 7 needs to pass over the side surface 3c of the engagement protrusion 3.

Conventionally, the side surface 3c of the engagement protrusion 3 was formed of a simple flat surface, so if the lid 1 has a slight warp, the corner 7a of the claw 7 will bend to the side surface before the pressing force of the lid 1 is released. 3c, and as a result, the claw 7 is pushed out again in the direction of arrow C in FIG.

3b, even if the lid body 1 has some warpage, the claw 7 will reliably fit into the stepped portion 3a or 3 as shown in FIG.
b.

Therefore, it is possible to reliably prevent the situation in which the lock does not occur due to a slight timing shift, etc., as in the conventional case.

In addition to the above embodiment, as shown in FIG.
by 7 Ct 7 d may be provided.

In any case, when releasing the engagement between the engagement protrusion 3 and the locking lever 5, the hook board 4 may be slid in the direction of the arrow in FIG.

As described above, the present invention can reliably prevent locking errors of the lid body with a simple structure.

In particular, the present invention has a plurality of continuous steps on either of the mutually engaging surfaces of the engagement protrusion and the engagement lever, so even if the amount of warp or twist of the lid varies considerably, The lid can be reliably locked by any one of the plurality of consecutive step portions, and there is no problem of loosening of the engaged state, which occurs when the lid is engaged by a simple inclined portion.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a side view showing its operation in progress, Fig. 3 is a side view showing its main parts, and Fig. 4 is a side view of the second embodiment of the invention. FIG. 3 is a side view showing main parts. 1... Lid body, 3... Engaging protrusion, 3a,
3b...Stepped portion, 4...Hook board, 5
...Lock lever, 7...Claw, 8...
... Coil Sfring, 7b, 7c. 7d...Dan section.

Claims (1)

[Scope of utility model registration request] A lid body is rotatably attached to the housing and has an engaging protrusion on a part thereof, and a lid body is rotatably attached to the housing and is always biased in a direction perpendicular to the movement locus of the stop protrusion. What is claimed is: 1. A lid opening/closing device comprising: a locking lever, and a plurality of continuous step portions are provided on one of the mutually engaging surfaces of the engaging protrusion and the locking lever.