JPH09163552A - Electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the come-off of a hinge, and prevent the lowering of the engagement retaining force of the hinge. SOLUTION: In an electric connection box where the body 21 and one end side of a cover 22 are coupled with each other by a hinge 23, and a lock mechanism 24 is provided at the other end, a support wall 35 is provided outside the peripheral wall 28 of the body 21. Inside the tip of the support wall 35, a body-side hook 36 C-shaped in cross section whose recess 36a and tip 36b are directed in the direction X of closing a cover and which has secured an insertion port 37 with a fixed width between the tip 36b of itself and the peripheral wall 32 is made integrally. On the side of one end of the cover 22, a cover- side hook 46 C-shaped in cross section whose recess 46a and tip 46b are directed in Y direction of opening the cover is projected. On the base side of the cover- side hook 46, a position regulating groove 42 which fits on the tip of the peripheral wall 32 is provided. The hinge 23 is constituted by inserting the tip 46b of the cover-side hook 46 from the insertion port 37, and engaging the tips 46b and 36b of the opposite hooks 46 and 36 with each recess 36a and 46a of both hooks 36 and 46.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an electric junction box having a removable cover.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a conventional electric junction box disclosed in Japanese Utility Model Laid-Open No. 2-10721. This electrical junction box comprises a main body 1 and a cover 2, and one side wall 2a of the cover 2
A locking rod 3 is hung vertically in parallel with the one side wall 2a, and a locking rod holder 4 composed of matching holding pieces 4a, 4b for removably and detachably fitting the locking rod 3 is attached to the main body 1. The locking rod 3 is provided with a projection 5 that abuts against the upper part of the one holding piece 4a of the locking rod holder 4 when the cover 2 is opened, and the locking rod 3 is centered around the abutting point. Locking rod holder 4 in the direction of revolution
The opening 6 is provided.

[0003]

In the above-mentioned conventional electric connection box, since the locking rod 3 is only held by the elastic holding force of the pair of holding pieces 4a, 4b, the locking rod 3 is opened. When pulled up in the direction of 6 (the direction of opening the cover), it might come off. In addition, the locking rod 3 with the clamping force.
Since it is necessary to hold it so that it does not come off,
There is a problem that a large stress is constantly applied to a and 4b, the holding force is lowered due to deterioration, and the cover 2 is easily removed.

In view of the above circumstances, it is an object of the present invention to provide an electric junction box in which the hinge is unlikely to come off in the closed state and the holding force is not lowered.

[0005]

According to a first aspect of the present invention, there is provided a main body having an opening, and a cover closing the opening. One end of the main body and the cover are rotatably and detachably coupled via a hinge. In an electric connection box having a lock mechanism for locking the main body and the cover in the closed state on the other end side of the main body and the cover, the tip of the peripheral wall is located outside the peripheral wall located on the one end side of the opening of the main body. A support wall directed in the same direction as the main body is provided integrally with the main body, and a concave portion and a tip of the support wall are directed inside the tip of the support wall in a direction of closing the cover, and there is a constant gap between the tip of the support wall and the peripheral wall. A main body side hook having a C-shaped cross section, which secures an insertion opening, is continuously provided along the peripheral wall, while a cover side having a C-shaped cross section in which the concave portion and the tip end of the hook is directed to the one end side of the cover in the direction of opening the cover. Set the hook on the cover side On the base end side of the cover, a position regulation groove that fits at the tip of the peripheral wall from the middle of the closing operation of the cover to regulate the position of the cover side hook is provided, and the tip of the cover side hook is inserted from the insertion port. The hinge is formed by engaging the tips of the mating hooks with the recesses of both hooks.

In this electric connection box, the hinge can be constructed by inserting the cover side hook from the insertion port of the main body and engaging the main body side hook. By closing the cover in this state, the cover side hook rotates with respect to the main unit side hook, and the position restriction groove on the cover side fits into the tip of the peripheral wall of the opening of the main body during the operation of the cover side hook. Is locked while the lock mechanism is locked. When this cover is closed, C that constitutes the hinge
-Shaped hooks are engaged with each other and that state is maintained by the action of the position regulation groove, so even if a pulling force in the direction to open the cover is applied to the cover side hook, the hooks will not disengage and the hook cross section The engaged state is maintained by the rigidity determined by the shape. Further, by fitting the position regulating groove to the peripheral wall of the opening, the waterproof property of the portion is also secured.

According to a second aspect of the present invention, there is provided the electrical junction box according to the first aspect, in which one longitudinal end of one of the main body side hook and the cover side hook is abutted against both longitudinal direction ends of the other hook. One of the features is that a rib is provided to prevent displacement in one longitudinal direction.

In this electric connection box, the hooks are positioned in the longitudinal direction by the ribs, so that the cover side hook and the main body side hook are prevented from being disengaged from each other.

A third aspect of the present invention is the electrical junction box according to the first or second aspect, characterized in that a chamfered portion is provided on the outer surface of the distal end of the peripheral wall into which the position regulating groove is fitted.

In this electric junction box, since the chamfered portion is provided on the peripheral wall into which the position regulating groove fits, the position regulating groove does not hit the corner of the peripheral wall when the cover is closed, and the electric connection box can be fitted easily. . Further, unnecessary sliding is eliminated when the cover is opened and closed, so unnecessary wear can be reduced.

A fourth aspect of the present invention is the electrical junction box according to any one of the first to third aspects, in which the peripheral wall located on the other side of the opening of the main body is on the other side of the cover provided with the lock mechanism. A feature is that a position regulating groove that fits at the tip is provided.

In this electric junction box, since the position regulating groove is also provided on the lock side, the lock can be surely positioned, so that the lock can be facilitated and the lock can be prevented from coming off.

[0013]

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

FIG. 1 is a sectional view of an essential part of an electric junction box 20 of the embodiment, and FIG. 2 is a plan view thereof (however, the cover 22 is shown by a chain double-dashed line). It should be noted that FIG.
It is an arrow sectional view, the same figure (b) is an enlarged sectional view of a lock mechanism 24 part, and the same figure (c) is an enlarged sectional view of a hinge 23 part.

The electric junction box 20 comprises a main body 21 having an opening 28 and a cover 22 closing the opening 28. One end of the main body 21 and the cover 22 are rotatably and detachably coupled via a hinge 23, and the other end of the lock mechanism 2 locks the main body 21 and the cover 22 in a closed state.
Four. The cover 22 is fitted so as to cover the opening 28 of the main body 21 from above, and the arrow X direction (downward) in FIG. 1 is the direction in which the cover 22 is closed, and the Y direction (upward) is in the direction in which the cover 22 is opened. is there.

As shown in FIG. 1, the peripheral wall 32 located at one end side (the right end side in the figure) of the opening 28 of the main body 21 is the main body 21.
Is extended to the upper end of the side wall 31 of which the tip is directed in the direction X for opening the cover 22. A chamfered portion 33 is provided on the outer surface of the tip of the peripheral wall 32. On the outer side of the peripheral wall 32, there is provided a support wall 35 whose front end is directed in the same direction as the front end of the peripheral wall 32.
2, the support wall 35 extends from the upper end of an L-shaped wall 34 extending from the side wall 31.

Inside the tip of the support wall 35, a main body side hook 36 having a C-shaped cross section is continuously provided. This hook 36
The recess 36a and the tip 36b are attached downward (in the X direction), and an insertion port 37 is secured between the tip 36b of itself and the peripheral wall 32 at a constant interval. Also, the support wall 3
A space 38 of a predetermined size is secured between the 5 and the peripheral wall 32.

On the other hand, the cover 22 has a peripheral wall 41 fitted in the opening 22, and a recess 46a and a tip 46 are provided outside the peripheral wall 41 on one end side (the right end side in FIG. 1) of the cover 22.
Section C in which b is directed to the opposite side (upper side) from the main body side hook 36
A character-shaped cover-side hook 46 is provided so as to project. On the base end side of the cover-side hook 46, a position-regulating groove 42 that is fitted to the tip of the peripheral wall 32 during the operation of closing the cover 22 and thereby regulates the position of the cover-side hook 46 is provided. The position regulating groove 42 is set to have a width that fits into the peripheral wall 32 with a slight clearance (or almost no clearance), and is bent outward from the peripheral wall 41 of the cover 22 and the upper end of the peripheral wall 41. It is composed of a bottom wall 43 and a hook base end wall 44 continuous with the groove bottom wall 43 and continuous with the cover side hook 46.

Further, as shown in FIG. 2, a pair of longitudinal ends of the cover side hook 46 abut against both longitudinal ends of the main body side hook 36 to prevent the cover side hook 46 from being displaced in the longitudinal direction. Ribs 47, 47 are provided. The ribs may be provided not at both ends of the cover side hook 46 but at both ends of the main body side hook.

Then, from the insertion port 37 to the cover side hook 4
6 is inserted into the recesses 36a and 46a of the hooks 36 and 46, and the tips 46b of the mating hooks 46 and 36 are
The hinge 23 is constituted by engaging 36b.

Further, the other end side of the opening 28 of the main body 21 (see FIG.
The peripheral wall 52 located on the left side of the center is the side wall 51 of the main body 21.
Is provided on the upper part of the cover 22 and the tip thereof is directed in the direction Y for opening the cover 22. A chamfered portion 53 is provided on the outer surface of the tip of the peripheral wall 52. On the outside of this peripheral wall 52, the tip is attached to the peripheral wall 52.
The locking wall 55 directed in the opposite direction (downward) from the tip of the is provided in parallel with the peripheral wall 52 in a state where a constant insertion port 58 is secured between the locking wall 55 and the peripheral wall 52. This locking wall 55 is the side wall 5
It is connected to the free end of the L-shaped wall 54 extending from 1.
A chamfered portion 57 is provided at an upper end corner portion of the locking wall 55 located at the entrance of the insertion port 58. Further, the L-shaped wall 54 is provided with an insertion hole 56 for a lock releasing jig.

On the other hand, on the outer side of the peripheral wall 41 on the other end side (the left end side in FIG. 1) of the cover 22, there is provided a lock side position regulating groove 62 which is fitted to the peripheral wall 52 of the main body 21 when the cover 22 is closed. It is provided. The position regulation groove 62 is formed in the peripheral wall 5
The width is set so as to fit with a slight gap with respect to 2, and the peripheral wall 41 of the cover 22, the groove bottom wall 63 that is bent outward from the upper end of the peripheral wall 41, and the groove bottom wall 63 are connected to each other. It is composed of a vertical wall 64 that can be inserted into the insertion port 58. A flexible lock arm 65 is provided at the same position as the vertical wall 64, and when inserted into the tip of the lock arm 65 from the insertion port 58, the tip (lower end) of the locking wall 55. An engagement protrusion 66 that engages is provided, and the lock arm 65 having the engagement protrusion 66 and the locking wall 55 provided in the main body 21 constitute the lock mechanism 24.

Next, the operation will be described.

In the electric junction box 20, when the opening 28 of the main body 21 is closed by the cover 22, first, the tip 46b of the cover side hook 46 is attached to the hinge 23 of the main body 21.
It is inserted into the side insertion port 37 and engaged with the main body side hook 36, thereby forming the hinge 23. At this time, rib 4
Since the positioning of the hooks 36, 46 in the longitudinal direction is performed by 7, the engaging positions of the hooks 36, 46 do not shift.

Then, in this state, the cover 22 is operated in the closing direction to rotate the cover side hook 46 with respect to the main body side hook 36. At that time, in the middle of the operation, the position regulating groove 42 on the hinge 23 side is fitted into the tip of the peripheral wall 32 of the opening 28 of the main body 21, whereby the position of the cover 22 is regulated and the lock arm 65 is disposed on the lock mechanism 24 side. Insert 58
Is inserted into. Then, the locking protrusion 6 of the lock arm 65
6 is engaged with the lower end of the locking wall 55, and the cover 22 is attached to the main body 21.
It is locked with the opening 28 closed.

When the cover 22 is closed, the main body side hook 36 and the cover side hook 46 that form the hinge 23 are engaged with each other, and the engaged state is due to the action of the position regulating groove 42. Is maintained,
Even if a pulling force in the opening direction is applied to the cover 22, especially on the hinge 23 side, the engagement of the hooks 36 and 46 is not disengaged, and the engagement state is maintained by the rigidity determined by the cross-sectional shape of the hooks 36 and 46. Therefore, as compared with the case of maintaining the engaged state of the hinge by the elastic clamping force as in the conventional example, the hinge 23 is less likely to deteriorate and can be detached, but the holding force of the hinge 23 does not decrease.

The hinge 23 side and the lock mechanism 24 are also provided.
Since the cover 22 is reliably positioned by the side position regulating grooves 42 and 62, the lock mechanism 24 can be easily engaged, the hinge 23 is prevented from coming off, and the cover 22 is surely prevented from falling off. It can be resolved. In addition, the waterproofness is ensured by fitting the position regulating grooves 42, 62 and the peripheral walls 32, 52 of the openings.

Further, since the chamfered portion 33 is provided on the outer surface of the distal end of the peripheral wall 32 on the hinge 23 side, when the cover 22 is closed,
The position regulating groove 42 does not hit the corner of the peripheral wall 32, and can be fitted easily. Similarly, the locking mechanism 24
Since the chamfered portions 53 and 57 are also provided on the side, the vertical wall 64 and the lock arm 65 at the tip of the cover 22 are easily fitted, and the workability is improved. Moreover, unnecessary sliding is eliminated in those portions, and unnecessary wear can be reduced.

[0029]

As described above, according to the first aspect of the present invention, since the hinge for connecting the cover and the main body is constituted by the engagement of the C-shaped hook, the hinge can be formed with the cover closed. There is no danger of it coming off. Further, since the hook engagement state is maintained by the rigidity determined by the cross-sectional shape of the hook, it is less likely to deteriorate and the holding force is not reduced as compared with the case where the hinge engagement state is maintained by the elastic clamping force. . Further, since the cover is positioned by the position regulation groove, the cover can be easily locked, the hinge can be prevented from coming off, and the cover can be reliably prevented from coming off. Further, by fitting the position regulation groove and the peripheral wall of the opening, it is possible to ensure the waterproof property of that portion.

According to the second aspect of the present invention, the engagement of the hook can be prevented from being disengaged by the rib, and the cover does not fall off even if the lock is disengaged.

According to the third aspect of the invention, since the chamfered portion is provided on the peripheral wall into which the position regulating groove is fitted, the workability in closing the cover can be improved and unnecessary wear can be prevented.

According to the fourth aspect of the present invention, since the position regulating groove is also provided on the lock side, it is possible to facilitate the lock and prevent the lock from coming off.

[Brief description of the drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention,
(A) is an overall sectional view, (b) is an enlarged sectional view of a lock mechanism 24 part, and (c) is an enlarged sectional view of a hinge 23 part.

FIG. 2 is a plan view of the main body according to the embodiment of the present invention.

FIG. 3 is a perspective view of a main part of a conventional electric junction box.

4 is a cross-sectional view showing an assembled state of the electric junction box of FIG.

[Explanation of symbols]

 20 Electrical Junction Box 21 Main Body 22 Cover 23 Hinge 24 Lock Mechanism 28 Opening 32 Peripheral Wall 33 Chamfering Part 35 Supporting Wall 36 Cover Side Hook 36a Recess 36b Tip 37 Insert Port 42 Position Limiting Groove 46 Body Side Hook 46a Recess 46b Tip 47 Rib 52 peripheral wall 62 lock side position regulating groove

Claims (4)

[Claims] 1. A main body having an opening, and a cover closing the opening, one end side of the main body and the cover being rotatably and detachably coupled via a hinge, and the main body and the other end side of the cover, In an electric junction box having a lock mechanism for locking the cover in a closed state, on the outer side of the peripheral wall located at the one end side of the opening of the main body,
A support wall whose tip is directed in the same direction as the tip of the peripheral wall is integrally provided with the main body, and inside the tip of the support wall, the recess and the tip of the support wall are directed toward the direction of closing the cover, and the tip of the support wall and the peripheral wall. Body-side hooks having a C-shaped cross section with a constant gap between them are continuously provided along the peripheral wall, while the recess and the tip of the cover are directed to the one end side of the cover in the direction to open the cover. A cover side hook having a C-shaped cross section is projected, and the base side of the cover side hook is fitted to the tip of the peripheral wall from the middle of the closing operation of the cover, thereby regulating the position of the cover side hook. An electrical junction box characterized in that the hinge is formed by providing a groove, inserting the tips of the cover side hooks from the insertion port, and engaging the tips of the mating hooks with the recesses of both hooks. 2. The electrical junction box according to claim 1, wherein one of the main body side hook and the cover side hook is abutted on both longitudinal ends of the other hook, and the other hook is abutted on both longitudinal ends thereof. An electrical junction box, characterized in that it is provided with ribs for preventing the hooks from being displaced in the longitudinal direction. 3. The electrical junction box according to claim 1, wherein a chamfered portion is provided on the outer surface of the distal end of the peripheral wall into which the position regulation groove fits. 4. The electrical junction box according to claim 1, wherein the tip of a peripheral wall located on the other side of the opening of the main body is fitted to the other side of the cover provided with the lock mechanism. An electrical junction box characterized by having a lock side position regulating groove.