JPH08111592A - Locking mechanism of sliding cover - Google Patents

Abstract

PURPOSE: To provide a mechanism capable of easily mounting a cover on a connecting box main body in a sliding manner and locking it. CONSTITUTION: A locking mechanism is composed of a locking groove 5 provided to a connecting box main body and a locking pawl 7 which is provided to a cover which confronts the connecting box main body and engaged with the locking groove in a sliding manner, wherein the locking groove 5 is composed of an insertion opening 8 wider than the locking pawl 7, a guide sloping wall 9 which decreases gradually inwards in width starting from the insertion opening 8, a press-fit space 12 as wide as the locking pawl 7 and continuously connected to the guide sloping wall 9, and a bearing/stopping wall 10 which is located at the terminal of the press-fit space 12 and the locking pawl 7 is made to bear against. The locking groove 5 is possessed of a sloping bottom wall hollowed out in the closing direction of a cover and located at a position corresponding to the guide sloping wall 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock mechanism for a slide-type cover which allows a cover to be slidably mounted and locked on a connection box body.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional sliding cover locking mechanism disclosed in Japanese Utility Model Laid-Open No. 63-140679. In this lock mechanism, a guide groove 23 is provided in the upper and lower walls 22 of a case (junction box body) 21 made of synthetic resin, and a lock convex portion 24 is formed in the guide groove 23. The slide type cover 25 is provided with a rail portion 26 for the guide groove 23, and the rail portion 26 is provided with an engaging concave portion 27 for the lock convex portion 24.

The cover 25 is slidably engaged with the case 21 from the side, and the lock convex portion 24 is fitted into the engaging concave portion 27 in a state where the rail portion 26 is engaged with the guide groove 23. As a result, the cover 25 is locked and fixed to the case 21.

[0004]

However, in the above-mentioned conventional lock mechanism, when the cover 25 is mounted on the case 21, the upper and lower rail portions 26 are formed in the narrow guide groove 23.
There was a problem that the work was troublesome because it had to be aligned. Further, when the lock of the cover 25 with respect to the case 21 (the engagement between the lock convex portion 24 and the engagement concave portion 27) is released, the cover 25 has to be twisted or the like, and the work of removing the cover 25 is troublesome. There was also a problem.

In view of the above points, it is an object of the present invention to provide a slide cover locking mechanism that can easily perform the lock operation of the cover and can easily unlock the cover. To do.

[0006]

To achieve the above object, the present invention provides a lock groove portion provided in a connection box body,
A lock pawl provided on the cover for the connection box body and configured to slidably engage with the lock groove, the lock groove having an insertion opening wider than the lock pawl, and an inward opening from the insertion opening. A guide slanted wall that gradually narrows, and a press-fitting space that has the same width as the lock claw following the guide slanted wall,
It is based on a lock mechanism of a slide-type cover, which is formed at the end of the press-fitting space and has an abutment stop wall for abutting the lock claw. A mechanism in which the lock groove portion has an inclined bottom wall dug down in the cover closing direction at a position corresponding to the guide inclined wall is also effective.

[0007]

When the cover is mounted, the lock claw is inserted into the insertion opening of the lock groove portion and slid in the lock groove portion in the lateral (orthogonal insertion direction) direction. The lock claw is guided to the press-fitting space along the guide slanted wall, press-fitted and locked in the press-fitted space, abuts against the contact stop wall, and is stopped and fixed. Further, the lock claw moves laterally along the guide slanted wall and descends along the slanted bottom wall, so that the cover comes into close contact with the connection body and closes.
The cover is detached by sliding the cover in the opposite direction to the above.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an electric junction box body (relay block body) having a sliding cover locking mechanism according to the present invention, and FIG. 2 shows a cover attached to the electric junction box body. The electric junction box body 1 is made of synthetic resin, and has a plurality of cavities 3 for accommodating relays (not shown) inside the outer peripheral wall 2. On the outer side of the outer peripheral wall 2, substantially trough-shaped lock groove portions 5 for the cover 4 made of synthetic resin are formed in three places in this example so as to project. The cover 4
The front end of the peripheral wall 6 faces the front end of the outer peripheral wall 2 of the connection box body 1.

The lock groove portions 5 are formed at two locations outside the front wall portion 2a of the outer peripheral wall 2 and at one location outside the rear wall portion 2b parallel to the front wall portion 2a. The lock claw 7 can be slid and inserted by having an upward insertion opening 8 for the member 7, a tapered guide inclined wall 9 for press-fitting, and an abutment stop wall 10. Further, the lock claws 7 are formed so as to hang down from the lower ends of the front wall portion 6a and the rear wall portion 6b of the cover 4 corresponding to the lock groove portions 5, and horizontally from the insertion opening of the lock groove toward the contact stop wall. It has an extended claw portion.

FIG. 3 shows a state in which the lock claw 7 of the cover 4 is engaged with the lock groove portion 5 of the connection box body 1.
The lock groove portion 5 extends in parallel along the outer peripheral wall 2 to form the wide insertion opening 8, and the widening wall 1 and the widening wall 1.
1. The guide inclined wall 9 that is inclined inward from 1 toward the outer peripheral wall 2 and the reduced width that forms a narrow press-fit space 12 that extends from the end of the guide inclined wall 9 in parallel with the outer peripheral wall 2. It has a wall 13 and the abutment stop wall 10 that connects the reduced width wall 13 and the outer peripheral wall 2 at the end of the press-fitting space 12.
The inner surface of each of the wall portions 9, 11, 13 is inclined in a tapered chamfered shape.

The width S ₁ of the insertion opening 8 is wider than the width (plate thickness) S ₃ of the lock claw 7, and the width S ₂ of the press-fit space 12 is set to be equal to or smaller than the width S ₃ of the lock claw 7. It Further, as shown in FIG. 4, the bottom wall 14 corresponding to the insertion opening 8 is shallowly and horizontally formed, and the bottom wall (sloping bottom wall) 15 corresponding to the guide slanting wall 9 is tapered gradually and gradually. The bottom wall 16 that is deeply dug down and corresponds to the press-fitting space 12 is formed deeply and horizontally.

The lock claw 7 shown in FIG. 3 has a width S ₃ at the base end.
The width (plate thickness) of the tip of the claw 7a may be slightly smaller than that of the claw 7a, and the claw 7a may have a shape in which the width gradually increases toward the base end. A tapered inclined portion 7b is formed on the upper end of the claw portion 7a. As shown in FIG. 4, the height H of the claw portion 7a toward the base end is set to be approximately the same as the gap between the contact stop portion 10 and the horizontal bottom wall 16.

When the cover 4 is attached, the lock claw 7
Is first inserted into the lock groove portion 5 through the wide insertion opening 8 and then the cover 4 is moved in the protruding direction of the lock claw 7, so that the lock claw 7 is pushed into the press-fitting space 12 along the inclined guide wall 9. It is guided to the inside of the width-decreasing wall 13 and moves downward along the inclined bottom wall 15 as shown in FIG. As a result, the lock claw 7 is press-fitted and locked between the reduced width wall 13 and the outer peripheral wall 2, and at the same time, the cover 4 moves in the closing direction so that the tip of the peripheral wall 6 of the cover 4 moves to the outer peripheral wall 2 of the connection box body 1. Stick it to the tip.

Finally, as shown in FIG. 4, the claw portion 7a of the lock claw 7 is fitted between the abutment stop wall 10 and the horizontal bottom wall 16, and the abutment stop wall 10 stops and locks the lock claw 7. Then, rattling in the front, rear, upper, and lower directions, that is, the lock claw 7 in the width S ₃ direction and the height H direction is prevented. When the lock pawl 7 is inserted into the insertion opening 8, since the insertion opening 8 is wider than the lock pawl 7, it is not necessary to align the lock pawl 7 with the insertion opening 8, and the cover 4 is connected to the junction box body. 1
The workability is good because it may be slightly deviated.

In order to detach the cover 4 from the junction box body 1, the cover 4 is slid in a direction opposite to the above with a slight force so that the lock claw 7 in the press-fit space 12 is removed.
The press-fitting is released, and it is easily released.

[0016]

As described above, according to the present invention, since the insertion opening of the guide groove portion of the connection box body is formed wider than the lock pawl of the cover, the lock pawl can be easily inserted into the guide groove portion. Therefore, even if the position of the cover with respect to the junction box body is not sufficient, the cover can be reliably attached. The lock claw inserted from the insertion opening into the guide groove is guided to the press-fitting space along the guide slanted wall and is press-fitted and locked therein, so that the cover can be locked easily and securely without rattling. Further, by sliding the cover in the opposite direction with a slight force, the press-fitting lock is released, and the cover can be easily separated from the connection box body.

[Brief description of drawings]

FIG. 1 is a plan view showing a connection box body provided with a lock mechanism for a slide-type cover according to the present invention.

FIG. 2 is a perspective view showing a cover of the same.

FIG. 3 is an exploded perspective view of essential parts showing a lock mechanism of a slide-type cover.

FIG. 4 is a view showing an engagement state of a lock claw with a lock groove portion;
2 is a cross-sectional view taken along line AA of FIG.

FIG. 5 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 1 Connection Box Main Body 4 Cover 5 Lock Groove 7 Lock Claw 8 Insertion Opening 9 Guide Inclined Wall 10 Contact Stop Wall 12 Press Fit Space 15 Inclined Bottom Wall

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Takahashi 100 Kanayama, Ichiriyama-cho, Kariya city, Aichi Toyota Auto Body Co., Ltd.

Claims (2)

[Claims] 1. A lock groove portion provided in a connection box body,
A lock pawl provided on the cover for the connection box body and configured to slidably engage with the lock groove, the lock groove having an insertion opening wider than the lock pawl, and an inward opening from the insertion opening. A guide slanted wall that gradually narrows, and a press-fitting space that has the same width as the lock claw following the guide slanted wall,
A lock mechanism for a slide-type cover, which is configured by an abutment stop wall located at the end of the press-fitting space and abutting the lock claw. 2. The lock mechanism for a slide type cover according to claim 1, wherein the lock groove portion has an inclined bottom wall dug down in the cover closing direction at a position corresponding to the guide inclined wall. .