JPH0338861Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a lid locking mechanism for an openable case of a headphone type audio cassette tape recorder or other electronic equipment.

<Prior Art> For example, the case of a conventional headphone type audio cassette tape recorder consists of a bottom cover 2' and a top cover 1', as shown in the simplified sectional view of FIG. , is pivoted by a hinge 13 etc. so that it can be opened and closed, and on the other side edge, via a locking mechanism B' consisting of a locking arm 6' and a release knob 5' for sliding the locking arm. , the locking protrusion 1'a of the upper lid 1' is removably locked to the locking arm 6',
The bottom cover 2' is kept in a closed state.

The locking mechanism B' is slidable in the direction of arrow A into a knob sliding hole 2'b formed in the bottom cover 2', as shown in an enlarged longitudinal cross-sectional perspective view of the main part in FIG. A locking support piece 5'a hangs down from the inner end of the lower piece of the release knob 5', which has a U-shaped cross section and is fitted in the knob sliding hole 2'b, and the inner end of the upper piece has a A locking arm 6' is provided to protrude upward, and a locking protrusion 6'a that locks to a locking protrusion 1'a of the upper lid 1' is bent and raised at its base end. One end of a coil spring 8 is fixed to the release knob 5', and the other end of the coil spring 8 is fixed to a stopper piece 7' fixed to a mounting plate 7 protruding from the bottom cover 2'. , the release knob 5' is always biased toward the base.

To open the top cover 1', when the release knob 5' is slid in the direction of arrow A against the biasing force, the locking arm 6' at the inner end also slides and the locking protrusion 6'a is opened. Since the upper lid is disengaged from the locking protrusion 1'a, the upper lid 1' opens upward.

During this time, the release knob 5' is restored toward the base by the biasing force.

In the figure, reference numeral 3 is a cassette half, and 4 is a battery.

<Problems to be solved by the invention> As is clear from FIG. and release knob 5'
It is provided in the center of the case in consideration of the sliding stroke. Therefore, the depth dimension _W1 of the product was larger than the reference dimension W by the dimension D.

The present invention aims to improve the lid locking mechanism that reduces the depth of the product with a simple structure and reliable operation.

<Means for solving the problem> The present invention utilizes a space corresponding to the protrusion size of the protrusions protruding from both ends of a container such as a cassette tape housed in a case to lock the lid locking mechanism. Arms are provided on both sides of the case and connected by connecting rods, and one of the locking arms is equipped with a spring that applies biasing force in the locking direction and a release knob for releasing the lock. , the release knob is fixed to the case and can be operated outside the case.

<Operation> By pressing the release knob against the biasing force of the spring in the locking direction, the two integrally connected locking arms are released from the top cover, allowing the case to be opened. .

<Examples> The present invention will be described in detail below with reference to illustrated examples.

The lid locking mechanism of the present invention is explained in detail with reference to the drawings.
FIG. 1 is a simplified longitudinal sectional side view showing the depth of the case, FIG. 2 is an enlarged perspective view showing the main part of the lid locking mechanism, and FIG. 3 is a simplified longitudinal sectional front view showing the case width.

In FIG. 2, reference numerals 9 and 9 indicate locking arms, which are made of flat rods, and each of which has a locking protrusion 1a of the upper lid 1 at its upper end.
The retaining protrusion 9a that is engaged with the
They are integrally fixed and connected by a connecting rod 11 of the book.
One of the locking arms 9 has a release knob 5 protruding from the upper part of the outer surface in a direction opposite to the locking protrusion 9a, and a lower end thereof has a release knob 5.
A dragonfly spring 10 is attached with one end fixed to the bottom cover 2, the other end fixed to the protrusion 9b of the locking arm 9, and the center part pivoted to the end 11a of the connecting rod 11. It is configured to be rotatably supported on the receiving portion 2a of the.

As shown in FIGS. 1 and 3, the locking mechanism B utilizes a space having a protrusion dimension C of the protrusions 3a, 3a on both sides of the cassette half 3, which serves as the storage body, on the opposite side of the hinge 13. Then, the receiving parts 2a, 2 of the bottom cover 2
a, and the dragonfly spring 10 always urges each of the engagement protrusions 9a in the direction of engagement with each of the engagement protrusions 1a of the top cover 1, and the case is installed in the case with a slight inward slope. It is being The release knob 5 is the third
As shown in the figure, it protrudes outside the case, and its pressing force in the direction of releasing the lid is transmitted equally to both locking arms through a connecting rod against a spring. Moreover, after the locking is released, the locking arm 9 is connected to the dragonfly spring 1.
0 returns it to its original position. When the lid is closed, the top lid 1
is due to the pressing force, and the locking protrusion 1a moves to the locking protrusion 9a.
It is pushed down against the biasing force along the inclined surface of the outer end, and is engaged in the state shown in FIG.

<Effects of the invention> The lid locking mechanism of the invention having the above configuration is installed in the width H direction of the case by utilizing the space of the protrusion dimension of the protrusion of the container, and the spring fulcrum is also located at the corner angle. Since it is located in the dead space of the internal space, the depth dimension does not exceed the standard dimension, and the case can be made smaller without requiring a large depth dimension for the locking mechanism unlike conventional cases. Materials are therefore also reduced. Further, due to its structure, the locking arms are provided oppositely on both sides and are locked to both sides of the case top lid, so that the lid can be kept in a closed state reliably.

[Brief explanation of the drawing]

FIG. 1 is a simplified vertical sectional side view of a case having a lid locking mechanism of the present invention, FIG. 2 is an enlarged perspective view of the main part of the lid locking mechanism, and FIG. Fig. 4 is an enlarged partial longitudinal sectional perspective view showing an example of a conventional lid locking mechanism, and Fig. 5 is a simplified vertical sectional side view of a case having the conventional lid locking mechanism. It is. 1... Top lid, 1a... Engaging ridge, 2... Bottom cover,
3... Container (cassette half), 3a... Protrusion,
5... Release knob, 9... Locking arm, 9a... Locking protrusion piece, 10... Spring, 11... Connection rod.

Claims (1)

[Scope of utility model registration request] In the case of a headphone type audio cassette tape recorder or other electronic device, which consists of a top cover and a bottom cover that are pivotally connected at one end so that they can be opened and closed, and which stores objects such as cassette tapes inside, the bottom cover at the other end of the case is a pair of locking arms that lock and support the top lid on the other end side, a spring that always urges the locking arms in the top lid locking direction, and a lower end of both of the locking arms that are connected to each other to fix the spring. A locking mechanism consisting of a connecting rod and a release knob that rotates a locking arm against an urging force is positioned and fixed in a space corresponding to the size of the protrusion of the protrusions on both sides of the accommodated object into the case. A lid locking mechanism for a case, which eliminates the need for a space for attaching the locking mechanism.