JPH0739047A - Drainage structure for protector - Google Patents

Abstract

PURPOSE:To provide a construction for surely preventing the infiltration of water into a water prevention box from a pattern-draw hole for lock claw forming of protector when a harness guide-out protector is adhered to a waterproof box such as junction box. CONSTITUTION:In a construction for adhering a protector 1 to a water prevention box such as junction box with a lock claw 4, a water draining guide rib 3 is attached by slanting a drainage guide rib 3 toward a side gutter portion 15 of a protector 1 directly below a lock claw forming pattern-draw hole 5 provided at the protector 1. Also, a projected streak 13 across the overall length is provided at the upper portion of the front end of the guide rib.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents water from entering a waterproof box such as a junction box through a die-cutting hole for forming a lock claw of the protector when the protector for harness is attached. It is related to the structure.

[0002]

5 to 6 show a conventional assembling structure of a waterproof box and a harness lead-out protector (refer to Japanese Utility Model Laid-Open No. 2-110920). The waterproof box (junction box) 22 has a relay, a fuse and the like (not shown) built therein, and leads their lead wires (not shown) from the opening 23. A protector 24 made of synthetic resin is attached to the waterproof box so as to face the opening 23.

The protector 24 is composed of a rectangular lid portion 25 for the opening portion 23 and a harness insertion portion 26 connected to the lower portion of the lid portion 25. A lock claw 28 for the frame wall 27 at the opening edge of the waterproof box 22 is provided on the upper portion of the lid portion 25, and the lock claw 28 engages with an engagement hole 29 of the frame wall 27 to keep the protector 24 in the waterproof box. 22
Join and fix to.

However, in the above-mentioned conventional structure, water penetrates into the waterproof box 22 through the die-cutting hole 30 of the protector 24 for molding the lock claw 28 as shown by an arrow B in FIG. There was a concern that it would adversely affect electrical parts.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a structure in which water does not enter the waterproof box through the die-cutting hole for forming the lock claw of the protector. .

[0006]

In order to achieve the above object, the present invention has a structure in which a protector is attached to a waterproof box such as a junction box by a lock claw, and a mold for forming a lock claw provided on the protector is provided. Basically, a guide rib for drainage is provided right below the cutout hole so as to be inclined toward the side groove portion of the protector.

[0007]

The water droplets that have penetrated into the protector through the die-cutting holes fall onto the guide ribs and are discharged to the outside from the side groove portions of the protector along the guide ribs. This prevents water from entering the waterproof box.

[0008]

1 to 4 show an embodiment of the drainage structure of a protector according to the present invention. This structure is characterized in that an inner wall 2 of a protector 1 made of a synthetic resin is provided with a guide rib 3 inclined in a mountain shape for drainage, which is located immediately below a die-cutting hole 5 for a lock pawl 4.

As in the conventional case, the protector 1 has a rectangular lid 8 facing the opening 7 (FIG. 4) of the waterproof box 6 and a harness insertion portion for accommodating a wire harness (not shown) drawn out from the opening 7. 9 and 9. The lid 8
Has a frame-shaped side wall 10 and a substantially rectangular bulging portion 12 that bulges inward from the upper wall 11 and the inner wall 2. The lock claw 4
Are formed in a pair on the left and right of the upper wall 11 with the claws 4a facing downward, and a pair of die-cutting holes 5 are formed in the inner wall 2 so as to face the claws 4a.
Is formed.

The mountain-shaped inclined guide rib 3 is formed so as to project from the inner wall 2 between the bulging portion 12 and the upper wall 11, and is located immediately below the die-cutting hole 5. A ridge 13 is formed over the entire length of the front end of the guide rib 3 so that water drops 14 (FIG. 1) that have dropped from the die-cutting hole 5 onto the guide rib 3 do not drip to the waterproof box 6 side.

Further, a vertical side groove portion 15 is formed between the both side walls 10 and the bulging portion 12, and both end portions 3a of the guide rib 3 are bulged via a hanging portion 3b bent downward. Part 1
2 which is continuous with the upper end 12a of the guide rib 3 and has a space 16 above the guide rib 3.
Are communicated with the side groove portion 15. The water droplets 14 that have dropped onto the guide ribs 3 pass through the side groove portions 15 as shown by arrow B and are discharged to the outside from an opening (not shown) of the harness insertion portion 9.

A pair of locking claws 17 (FIG. 1) are formed on both side walls 10 of the lid portion 8. Since the claw portion 17a of the lock claw 17 is formed outward, no die-cutting hole is required. Then, as shown in FIG. 4, the lock claws 4 and 17 are engaged with the engaging holes 18 on the waterproof box 6 side to fix the protector 1 to the waterproof box 6. It is also possible to minimize the intrusion of water by bringing the tip 19a of the frame wall 19 (FIG. 4) having the engaging hole 18 of the waterproof box 6 into close contact with the die-cutting hole 5.

[0013]

As described above, according to the present invention, the water that has penetrated into the protector through the die-cutting hole for forming the lock claw is guided to the guide ribs and discharged from the side groove portion to the outside.
Water does not enter the waterproof box, and electric parts such as relays and fuses are reliably protected from damage by water.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a drainage structure for a protector according to the present invention.

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

FIG. 3 is an enlarged perspective view showing a portion B of FIG.

FIG. 4 is a vertical cross-sectional view of a main part in a state where the protector is assembled to the waterproof box.

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

FIG. 6 is a longitudinal sectional view of a main part of the same state where the protector is assembled to the waterproof box.

[Explanation of symbols]

 1 protector 3 guide rib 4 lock claw 5 die-cutting hole 6 waterproof box 13 ridge 15 side groove

Claims (2)

[Claims] 1. In a structure in which a protector is attached to a waterproof box such as a junction box with a lock claw, a drainage guide rib is provided in a side groove portion of the protector just below a die release hole for molding the lock claw provided in the protector. A drainage structure for the protector, which is provided so as to be inclined toward the user. 2. The drainage structure for the protector according to claim 1, wherein a protrusion extending over the entire length of the guide rib is provided on the upper portion of the front end of the guide rib.