JPS61221483A - Lid opening and closing apparauts - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a lid opening/closing device for audio equipment, etc.

2. Description of the Related Art A conventional lid opening/closing device for an audio device, etc. has a compression spring 21 mounted inside a hinge 20 and a swinging piece 2, as shown in FIG.
2 is pressed by the movable piece 23 with the stored force of the compression spring 21, and the lid 3 is kept stationary by balancing with a couple of forces due to the weight of the lid 30 fixed by the swinging piece 22.

Because of the large size, it was difficult to incorporate it into small devices.

An object of the present invention is to provide a lid opening/closing device that can be incorporated into small-sized equipment.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention forms a hook-shaped protrusion near the rear end of the lid body in an arc shape centered on the axis of the hinge. A support member is fixed to the main body, and an L-shape is formed at the tip of the main body to allow the support member to accumulate force and open the lid at a predetermined angle when the lid is fully closed.

A locking portion is formed at one end of an abbreviated locking member that pivotally supports a torsion spring having a L-shaped arm, and is swung by engaging with the L-shaped arm of the torsion spring. A locking member is pivotally supported at a position that locks the hook-shaped protrusion of the support member when the lid is fully opened.

According to the above-described structure, when the torsion spring is fully closed, the torsion spring is released and the lid is opened by a predetermined angle, and when the lid is fully opened, the locking member locks the support member to keep the lid stationary.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. In FIG. 1, 1 is a main body, and a lid 3 is pivotally supported by a hinge 2. The lid 3 has a support member 4 having an arc shape centered on the axis of the hinge 2 and having a hook-shaped protrusion 401 at the tip.
is fixed, and the tip of the support member 4 is also inserted into an opening bored in the table board 101 of the main body 10.

On the side wall of the main body 1, there is a torsion spring 5 having an L-shaped arm 501 at its tip, and a torsion spring 6 having an oval shape and engaging with the L-shaped arm 501 of the torsion spring 6 at one end. A locking member 6 having a long hole 601 and a locking portion 602 formed at the other end is rotated by the biasing force of the L-shaped arm 501 of the torsion spring 5 when the lid 3 is opened and closed. A long hole 601 located within the movement range of the support member 4 and formed at one end of the locking member 6.
It is supported by a shaft 7.8 so as to be inserted into the shaft.

First, I will explain the operation when opening.

FIG. 2 shows the fully closed state, in which the support member 4 fixed to the lid 3 is further inserted through the opening of the table board 101 of the main body 1 by the closing movement of the lid 3, and the torsion spring 6 is activated. At the same time as the torsion spring 5 comes into contact with the L-shaped arm 501 and stores force, the locking member 6 that is engaged with the L-shaped arm 601 of the torsion spring 6 through the elongated hole 601 is rotated clockwise to close the locking portion. 602 is the support member 4
becomes a non-contact state.

If the lid 3 and the main body 1 are unlatched from the state shown in FIG. 2, for example, by operating the lid opening button, the lid 3
Due to the reaction force of the torsion spring 6, the L-shaped arm 501 pushes up the support member 4 and opens the lid 3 at a predetermined angle.
The locking member 6 engaged at 01 is rotated in the direction of the half-hour hand. The locking member 6 has a locking portion 602 formed at one end thereof in contact with the outer arc of the support member 4 .

After that, when the lid 3 is further opened, the hook-shaped protrusion 401 of the support member 4 resists the locking portion 602 of the locking member 6, which is biased in the direction of the half-hour hand by the torsion spring 5, against the biasing force of the torsion spring 5. It rotates and passes through the locking member 6 and comes into contact with the table board 101 of the main body 1, thereby preventing the opening movement. At this time, the locking member 6 is again urged in the direction of the half-hour hand by the torsion spring 5, and the locking portion 602 at one end locks the hook-shaped protrusion 401 of the support member 4, so that the lid 3 is closed as shown in FIG. is left fully open.

The following closing movement will be explained.

When force is applied to the lid 3 in the closing direction from the fully open state shown in FIG. 3, the force is transmitted to the support member 4.
01 rotates the locking portion 602 of the locking member 6 clockwise, the lock is released, and the force applied to the support member 4 is caused by the locking portion 602 of the locking member 6 biased by the torsion spring 5. The closing movement continues smoothly due to only the resistance force coming into contact with the outer arc of the support member 4.

Then, when the support member 4 comes into contact with the L-shaped arm 501 of the torsion spring 6 and the lid 3 is further closed, the torsion spring 6 accumulates force and at the same time the locking member 6 engaged with the elongated hole 601 is turned off. When the locking portion 602 is rotated in the direction, the locking portion 602 is out of contact with the outer arc of the support member 4, and only the reaction force of the torsion spring 60 acts on the support member 4, and the stored force of the torsion spring 5 is released. Sometimes there is no extra loss.

If the lid 3 is locked to the main body 1 in this state, the fully closed state is maintained.

Effects of the Invention In the present invention, the supporting member fixed to the lid and the locking member pivotally supported to the main body can each be configured in a plate shape, and the space occupied inside the main body can be kept to a minimum, which contributes to miniaturization of the equipment. It has great effects.

[Brief explanation of drawings]

Fig. 1 is an enlarged view of essential parts of a lid opening/closing device according to an embodiment of the present invention, Fig. 2 is a side view showing the opening/closing device in a fully closed state, and Fig. 3 is a side view showing the opening/closing device in a fully open state. FIG. 4 is a perspective view of a conventional lid opening/closing device. 1...Body, 3...Lid, 4...
・Support member, 5...Torsion spring, 6...
Locking member. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1116 Honbayashi 3...Lid 4...&Installation Parts Figure 3

Claims (1)

[Claims] a main body, a lid pivotally supported by a hinge, a support member having an arc shape centered on the axis of the hinge and having a hook-shaped protrusion at the tip and inserted into an opening drilled in the upper surface of the main body; a torsion spring that is fitted onto a support shaft fixed to the main body and has an L-shaped arm at its tip; 1. A lid opening/closing device comprising: a long hole that undergoes rocking due to torsion; and a locking member having a locking portion formed at the other end and pivotally supported by the main body.