JPH11141514A - Opening and closing member lock mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock mechanism capable of a sure rock movement through smooth operation by a simplified constitution. SOLUTION: When a lock pawl body 6 is pressed down, the lower slant portion 6a of the lock pawl body 6 abuts onto the upper end right portion of a lock arm body 10 so as to turn the lock arm body 10 counterclockwise against the energizing force of a wound spring 19. when the lock pawl body 6 is further pressed down so that the upper flat portion 6b of the lock pawl body 6 is moved to the lower side of a folded portion 10a provided at the upper end portion of the lock arm body 10, the rock arm body 10 is turned clockwise receiving the energizing force of the coiled spring 19, and the upper flat portion 6b of the lock pawl body 6 is engaged with the folded portion 10a of the lock arm body 10. In this engage state, the energizing force of the coiled spring 19 is applied to the engage portion so that the engage state can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to portable small electronic equipment and the like, and is an opening / closing member for locking a case body which opens and closes with respect to a main body case so as to be immovable with respect to the main body case. Related to the lock mechanism.

[0002]

2. Description of the Related Art Conventionally, in a portable electronic device, for example, as shown in FIGS. 7A and 7B, an LCD (liquid crystal display) display unit 3 is provided on a main body case 2 provided with a keyboard 1 and the like. In the case where the case body 4 provided with a member or the like is rotatably provided, an opening / closing member locking mechanism as described later is often provided in order to prevent the case body 4 from being carelessly moved. .

[0003] Numerous types of opening / closing member locking mechanisms have been proposed and implemented.
Some include lock means and unlock means described in Japanese Patent No. 3272, and others have a configuration as illustrated in FIG.

In FIG. 8, a lock claw body 6 is provided on the case body 4 side, and is further engaged with the lock claw body 6 on the main body case 2 side to inhibit the lock claw body 6 from moving upward. The lock member 7 provided with the locking portion 7a is provided so as to be movable in parallel and slidable. In the drawing, a solid line indicates a state at the time of disengagement (at the time of unlocking) enabling the lock claw body 6 to move upward, and a broken line indicates a state where the lock claw body 6 and the lock member 7 are engaged. (When locked).

In order to ensure the parallel movement of the lock member 7, guide pins 9 are provided on the main body case 2 side so as to loosely fit into a pair of horizontally long grooves 8 formed in the lock member 7, and guide the movement of the lock member 7. I'm trying to do it.

[0006]

In the above-mentioned prior art, in the configuration shown in FIG.
However, if the lock member 7 is warped, the lock member 7 may not be normally engaged depending on the degree of warp.

A guide pin 9 is loosely fitted into the horizontally long groove 8 as a guide for moving the lock member 7 in parallel. However, in order to accurately guide the parallel movement, at least a pair of the horizontally long groove 8 and the guide pin are used. 9 must be installed.
In addition, in order to improve the slidability, it is necessary to increase the distance between the guide pins 9. However, if the distance is too long, the lock member 7 is likely to be warped. There is a problem that the number of installations needs to be increased, and the configuration becomes incompatible with small devices.

It is an object of the present invention to provide an opening / closing member locking mechanism which can reliably perform a locking operation by a smooth operation with a simplified configuration.

[0009]

In order to achieve the above-mentioned object, the present invention provides a case for locking a case body which is opened and closed with respect to a main body case so as to be immovable with respect to the main body case when closed. An opening / closing member locking mechanism, wherein one of a lock member and a lock member that engages with the locked member and locks the locked member is provided on the main body case, and the other is provided on the case body. The lock member is provided so as to be rotatable with respect to a support shaft between a position where the lock member is engaged with the locked member and a position where the lock member is released, and the lock member and the locked member are further provided. An elastic member that elastically urges in the engaging direction is provided. With this configuration, the locking member rotates about the support shaft as a center fulcrum, thereby engaging and disengaging the locked member. Because its operation is reliably and smoothly, yet it engaged state when the lock is reliably maintained by the biasing force of the elastic member.

Further, according to the present invention, a guide groove is formed in the lock member, and the guide groove guides the rotation of the lock member and releases the engagement with the locked member. The release operation shaft member is loosely fitted,
With this configuration, since the rotation guide and the engagement release of the lock member are performed by one shaft member, the configuration is simplified, and the size and the space can be reduced.

Further, the present invention is characterized in that the lock member is formed of an elastic material so that the lock member can be disengaged by being bent by receiving an operation force from the guide and release operation shaft member. With this configuration, the engagement can be released by pressing the lock member, so that the operability can be improved, and the configuration of the engagement release is simplified, and the number of parts is reduced. be able to.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial cross-sectional front view showing a main part of an opening / closing member locking mechanism for explaining an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA of FIG. The mechanism is applied to a portable small electronic device as shown in FIG.
Members corresponding to the members described in FIG. 8 are denoted by the same reference numerals, and detailed description will be omitted.

In FIGS. 1 and 2, reference numeral 6 denotes a lock claw body as a locked member fixed to the case body 4 side; and 10 denotes a lock arm body as a lock member provided on the main body case 2 side as described later. , 11 is a side plate having a through hole 11a through which the locking claw body 6 can enter and exit and having a function such as a keyboard cover installed on the upper part of the main body case 2, and 12 is installed in the main body case 2. This is a frame for holding the constituent members.

The lock arm body 10 is made of an elastic plate and has flexibility in the direction of arrow A in FIG. 2, and has a lower end rotatably provided by a support shaft 15 fixed to the frame 12. Further, an arc-shaped guide groove 16 having the same center as the support shaft 15 is formed at an upper portion thereof.
The base 17a of the operating shaft 17 is loosely fitted to the shaft 6.
The base 17a is held on the frame 12 by a retaining ring 18. On the side of the operation shaft 17 opposite to the base 17a, an operation portion 17b is provided so as to be able to enter and exit the lateral hole 11b of the side plate 11.

One end 19a of the support shaft 15 is fixed to a part of the lock arm body 10, and the other end 19b is connected to the operating shaft 1
A wound spring 19 as an elastic member elastically contacting in the radial direction is wound. The helical spring 19 is set to have a resilient force to open outward (in the direction of arrow B in FIG. 1), and is elastic so as to rotate the lock arm body 10 clockwise about the support shaft 15. It is energizing.

Next, the operation of the lock mechanism having the above structure will be described with reference to FIGS.
This will be described with reference to FIG.

FIGS. 1 and 2 show a state where the case body 4 is opened with respect to the main body case 2 and each member is free. In this state, the lock arm body 10 applies the urging force of the winding spring 19. As a result, the left end of the guide groove 16 (see FIG. 1) is received by the operation shaft 1
7 is in contact with the base 17a and cannot rotate. And the upper part of the lock arm body 10 is installed facing the through-hole 11a.

FIG. 3 is a front view of FIG. 3 and FIG.
The state of the sectional view taken along the line A shows one state of the lock operation process. When the case body 4 is closed with respect to the main body case 2, the lock claw body 6 is pushed down, and the lower inclined portion 6a of the lock claw body 6 is pressed.
Is in contact with the right upper end of the lock arm body 10 and the coil spring 1
9 to rotate the lock arm body 10 counterclockwise. When the lock claw body 6 is further pushed down and the upper flat portion 6b of the lock claw body 6 moves below the bent portion 10a provided at the upper end of the lock arm body 10, the biasing force of the winding spring 19 is received. As a result, the lock arm body 10 rotates clockwise, and the lock claw body 6 engages with the lock arm body 10.

In the engaged state, the upper flat portion 6b of the lock claw body 6 comes into contact with the bent portion 10a of the lock arm body 10, and the upward movement of the lock claw body 6 is prevented, so that the lock state is brought into the locked state. Since the urging force of 19 is applied to the engagement portion, this locked state is maintained.

FIG. 5 is a front view of FIG. 5 and FIG.
6A shows a state of the unlocking process. In FIG. 6, when the operating shaft 17 is pressed inward, the lock arm body 10 is elastically deformed and bent. Is held by the support shaft 15, the upper portion moves inward, and therefore the upper bent portion 1 of the lock arm body 10 is moved.
0a comes off the upper flat portion 6b of the lock claw body 6. When the case body 4 is lifted with respect to the main body case 2 in this state,
Since the lock claw body 6 is unlocked, it can move upward together with the case body 4. Thereafter, when the pressing on the operating shaft 17 is released, the lock arm body 10 returns to the state shown in FIG. 2 by its own elasticity.

As described above, in the lock mechanism of the present embodiment, the engagement and disengagement with the lock claw body 6 are performed by the rotation of the lock arm body 10 about the support shaft 15 as a fulcrum. The operation is assured and smooth, and the engagement state at the time of locking is reliably maintained by the urging force of the winding spring 19.

The guide groove 16 of the lock arm body 10
The base 17a of the operating shaft 17 is loosely fitted to the shaft, so that the operating shaft 17 also serves as a guide member for the rotation of the lock arm body 10, thereby simplifying the configuration, miniaturizing and saving space. Can be achieved.

Further, since the lock arm body 10 is formed of an elastic material, the lock arm body 10 can be disengaged by pressing the lock arm body 10. Therefore, the operability is reduced, and the structure for disengaging the lock arm body 10 is improved. It ’s easy,
The number of parts can be reduced.

[0025]

As described above, according to the opening / closing member locking mechanism of the present invention, the operation can be performed reliably and smoothly, and the locked state can be reliably maintained.

Further, since the configuration is simplified, the size and space can be reduced and the number of parts can be reduced.
Moreover, the practical effect is large, such as the operability is improved.

[Brief description of the drawings]

FIG. 1 is a front partial cross-sectional view showing a main part of an opening / closing member locking mechanism for explaining an embodiment of the invention;

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a front view of the opening / closing member locking mechanism in FIG. 1 in a locking process.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a front view of the opening / closing member locking mechanism in FIG. 1 in a lock releasing process;

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is a perspective view for explaining the opening and closing operation of a general portable electronic device.

FIG. 8 is a configuration diagram showing a conventional opening / closing member locking mechanism.

[Explanation of symbols]

 2 Body Case 4 Case Body 6 Lock Claw Body 10 Lock Arm Body 11 Side Plate 12 Frame 15 Support Shaft 16 Guide Groove 17 Operation Shaft 17a Base 17b Operation Unit 19 Winding Spring

Claims (3)

[Claims] A locked member engages with the locked member to lock the case body that opens and closes relative to the main body case in a state where the case body is opened and closed with respect to the main body case when closed. An opening / closing member locking mechanism, wherein one of a locking member for locking a locking member is provided on the main body case, and the other is provided on the case body, wherein the locking member is provided on a support shaft and the locked member is provided. And a resilient member for resiliently biasing in a direction in which the lock member and the locked member are engaged with each other. An opening / closing member locking mechanism. 2. A guide groove portion is formed in the lock member, and a guide and release operation shaft for guiding rotation of the lock member and releasing engagement with the locked member in the guide groove portion. 2. The opening / closing member locking mechanism according to claim 1, wherein the member is loosely fitted. 3. The lock member is made of an elastic material so that the lock member can be disengaged by being bent by receiving an operation force from the guide and release operation shaft member. An opening / closing member locking mechanism according to claim 2.