JP2004072855A - Mounting structure of waterproof cover of electric connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof cover which waterproofs an electric connection box and is excellent in mountability. <P>SOLUTION: For the waterproof cover 13, shaft members 14 are stored via springs S in shaft storage chambers 13f pitted in both walls 13g projected from the plate-shaped body 13h, and the shaft members 14 are biased in projection state, while for a bracket 12 securing holes 12d for the shaft members 14 of the waterproof cover 13 are bored inside opposite walls 12e. Both walls 13g of the waterproof cover 13 are slid and set between both walls 12e of the bracket 12, and the spring S is shrunk by pressing the shaft member 14 with the wall 12e, whereby it can move inward and is accommodated in the shaft storage 13f. At the point when the shaft member 14 of the waterproof cover 13 and the securing hole 12d of the bracket 12 agree with each other, the spring S elongates and the shaft member 14 is set and secured in the securing hole 12d. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mounting structure for a waterproof cover of an electric junction box, and more particularly, to preventing water from entering a junction box for an automobile.
[0002]
[Prior art]
Some junction boxes mounted on automobiles are mounted below a duct of an air conditioner piped in the vehicle, and water droplets dripping from the duct cause a waterproof area of the junction box (for example, a connector housing portion or the like). It is necessary to take measures to prevent water from entering the area.
For example, as shown in FIG. 7, after the connector 2 of the terminal of the wire harness W / H is fitted into the connector accommodating portion 1 a provided on the upper surface of the case of the junction box 1, the waterproof sheet 3 is applied from above to the adhesive. And so on so that water droplets do not enter the connector housing portion 1a.
[0003]
[Problems to be solved by the invention]
However, according to the waterproof structure described above, water droplets that have fallen on the waterproof sheet 3 from the duct may drop to unexpected locations due to deformation of the waterproof sheet 3, or water may adhere to the back surface of the waterproof sheet 3. Water may enter the waterproof area. In addition, there is a case where the water dropped on the waterproof sheet 3 does not immediately flow out of the sheet 3 and stays on the sheet 3, and the staying water flows down at a stretch due to unexpected deformation of the waterproof sheet 3 and scatters to the waterproof area. It may be possible to do so.
Furthermore, if the worker forgets to attach the waterproof sheet 3 after fitting the connector 2 into the connector accommodating portion 1a of the junction box 1, there is a defect that water enters the waterproof area of the junction box 1 such as the connector accommodating portion 1a. There is also a problem that occurs.
[0004]
The present invention has been made in view of the above problems, and provides a waterproof cover that can be reliably drained so as not to be flooded in a waterproof area of a junction box (electric junction box) and has good attachment properties. The task is to prevent forgetting to work.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes a bracket on the upper surface side of the case of the electric junction box, and a waterproof cover made of synthetic resin attached to the bracket,
The waterproof cover projects the wall vertically from both sides of the substantially plate-shaped main body, accommodates the shaft member via a spring in a shaft accommodating chamber recessed in the wall, and accommodates the shaft member. While biasing to a protruding state,
The bracket has a mounting portion protruding from the vehicle body, and a locking hole for a shaft member of the waterproof cover is formed inside the opposing wall,
Both walls of the waterproof cover are slidably fitted between both walls of the bracket, and the shaft member of the waterproof cover is moved inward by contracting the spring at the wall of the bracket to accommodate the shaft. Department in the state of accommodation,
When the shaft member of the waterproof cover and the locking hole of the bracket coincide with each other, a spring is extended and the shaft member is fitted and locked in the locking hole. A cover mounting structure is provided.
[0006]
With the above configuration, the waterproof cover made of synthetic resin is attached as the cover of the electric connection box, so that the waterproofing can be stably and surely performed as compared with the conventional waterproof sheet.
Also, when assembling the waterproof cover, simply slide-fit both sides of the waterproof cover between both side walls of the bracket, and the protruding shaft member is pushed by the wall of the bracket to contract the spring. Since it fits in the shaft housing and is in a non-projecting state, the shaft of the waterproof cover does not hinder the mounting operation. This eliminates the need for the operator to slide the waterproof cover inward while forcibly bending both walls inward.
In addition, when the shaft member of the waterproof cover and the locking hole of the bracket match, the shaft member is automatically projected by a spring and fitted and locked in the locking hole.
Therefore, the mounting workability when mounting the waterproof cover on the bracket can be improved.
[0007]
It is preferable that the corner of the tip of the shaft member of the waterproof cover has a curved surface or a tapered shape.
[0008]
With the above configuration, when the waterproof cover is attached to the bracket, when the two walls of the waterproof cover are slid and inserted between the two walls of the bracket, the tip corner of the shaft member has a curved surface or a tapered shape. Thus, the protruding shaft member can be smoothly inserted without being caught by the insertion inlet portion on the bracket side, and the shaft member can be moved into the shaft housing portion.
Instead of providing the curved surface or the tapered portion on the shaft member side of the waterproof cover, the insertion workability may be improved by forming the insertion inlet portion of the mating bracket into a curved surface or a tapered shape.
[0009]
The waterproof cover covers the upper surface of the case by being rotatably attached to a bracket for fixing the electric connection box to a vehicle body,
The first connector is fitted into the connector accommodating portion on the upper surface of the case by rotating the waterproof cover toward the side surface of the case so that the connector accommodating portion on the side surface of the case cannot be fitted. And the second connector is fitted into the connector accommodating portion on the side of the case.
[0010]
With the above configuration, when the first connector is fitted into the connector accommodating portion on the upper surface of the case, the connector accommodating portion on the side surface of the case is hidden by the waterproof cover and cannot be fitted. When fitting the second connector, the waterproof cover must be turned to the upper surface side of the case.
Therefore, by performing the connector fitting operation, the worker can forcibly return the waterproof cover to the state of covering the upper surface of the case, and it is possible to prevent forgetting to return the rotating waterproof cover.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
1 and 2 show a junction box (electric connection box) 10 to which a waterproof cover 13 made of synthetic resin is attached.
As shown in FIG. 2, the junction box 10 accommodates a bus bar 15 and an ECU board 16 laminated inside the case to form a circuit, and includes a connector accommodating portion 11a-1 on a case side surface 11a and a case The connector housing 11b-1 is also provided on the upper surface 11b.
[0012]
A bracket 12 shown in FIG. 4 is attached to the case upper surface 11b. The bracket 12 includes a wall portion 12e above both sides, and a mounting portion 12a for attaching to a vehicle body at a tip end of the wall portion 12e. 12b protrudes.
As shown in FIGS. 4 and 5, a slide frame 12c of a shaft member 14, which will be described later, is provided on the wall 12e in parallel with the wall 12e, and a terminal end of the slide frame 12c is perpendicular to the wall 12e. A locking hole 12d is formed in the direction.
[0013]
A waterproof cover 13 shown in FIG. 3 is rotatably attached to the bracket 12.
The waterproof cover 13 protrudes below the wall 13g from both sides of the substantially plate-shaped main body 13h, and a shaft housing 13f is recessed at a lower end of the wall 13g, and a coil spring S is provided in the shaft housing 13f. The shaft member 14 is movably housed and locked via the shaft member 14.
[0014]
As shown in FIG. 3 (C), the shaft member 14 has a flange 14 a protruding from a rear end edge of a cylindrical shape, a projection 14 c provided from the center of the rear end face, and a rounded end provided at a tip corner. It is a part 14b.
The shaft accommodating portion 13f is recessed to have an inner diameter substantially the same as the outer diameter of the flange portion 14a of the shaft member 14, and a protruding portion 13i protrudes inward from a distal end edge of the shaft accommodating portion 13f.
With the projection of the shaft member 14 passing through the center of the coil spring S, the shaft member 14 is housed in the shaft housing portion 13f via the coil spring S and urged outward, and the flange portion 14a is The shaft member 14 is prevented from coming off by stopping at the protrusion 13i.
That is, as shown in FIG. 3D, the shaft member 14 can be pushed and moved into the shaft housing portion 13f by contracting the coil spring S.
[0015]
The main body portion 13h of the waterproof cover 13 has a valley portion 13b serving as a stagnation portion of water, and a bulge is provided at one end in the longitudinal direction of the valley portion 13b to serve as a water stop portion 13d. On the other end side, a rib 13c, which is shorter than the water stop portion 13d, protrudes upward, and a drop portion 13e formed continuously with the wall portion 13g at a position below the rib 13c protrudes downward.
One side of the main body 13h is provided with a closing portion 13a for concealing a part of the connector accommodating portion 11a-1 on the side surface 11a of the case. Is cut out.
[0016]
Next, an operation of attaching the waterproof cover 13 to the bracket 12 will be described.
As shown in FIG. 5A, with the shaft member 14 of the waterproof cover 13 slid on the slide frame 12 c of the bracket 12, both the wall portions 13 g of the waterproof cover 13 are slid onto the both wall portions 12 e of the bracket 12. Fit.
At this time, since the tip corner of the shaft member 14 is a curved surface portion 14b, the projecting shaft member 14 does not catch on the insertion entrance of the slide frame 12c, and the shaft member 14 contracts the coil spring S to accommodate the shaft. It fits smoothly into the portion 13f and becomes a non-projecting state.
[0017]
Note that a tapered portion may be provided instead of providing the curved surface portion 14b at the tip corner of the shaft member 14.
Also, instead of providing a curved surface or a tapered portion on the shaft member 14 side, the insertion inlet portion 12f 'of the slide frame 12c of the mating bracket 12 is formed as a curved surface or a tapered shape as shown in FIG. It does not matter.
[0018]
When the shaft member 14 of the waterproof cover 13 and the locking hole 12d of the bracket 12 match, the shaft member 14 is automatically protruded by the extension of the coil spring S and is fitted and locked in the locking hole 12d. .
Therefore, the mounting workability when mounting the waterproof cover 13 on the bracket 12 can be improved.
[0019]
Next, the operation of fitting the connector to the junction box 10 will be described.
FIGS. 1 and 2 show an initial state in which the waterproof cover 13 is tilted toward the case side surface 11a. From this state, a first connector (not shown) is fitted into the connector accommodating portion 11b-1 of the case upper surface 11b. Combine.
Next, since the uppermost connector accommodating portion 11a-1 of the case side surface 11a is partially hidden by the closing portion 13a of the waterproof cover 13 and cannot be fitted, the waterproof cover 13 is rotated toward the case upper surface 11b. After covering the case upper surface 11b shown by the two-dot chain line in FIG. 2, a second connector (not shown) is fitted into the connector accommodating portion 11a-1 on the case side surface 11a.
In other words, the connector fitting operation cannot be performed unless the waterproof cover 13 is rotated so as to cover the case upper surface 11b, so that the waterproof cover 13 is forgotten to be returned to the normal position (two-dot chain line in FIG. 2). It is preventing.
[0020]
Next, a drainage structure using the waterproof cover 13 will be described.
With the waterproof cover 13 in the normal position to cover the upper surface 11b of the case, water drops that have fallen on the surface of the waterproof cover 13 are collected in the valleys 13b, and the water drops 13d protruding to one side of the valleys 13b cause the water drops. Flows to the other side of the rib 13c.
The water droplets collected in the valley 13b stay on the valley 13b until the water level exceeds the rib 13c, and are evaporated.
[0021]
If the water level that exceeds the rib 13c is reached before the water droplets remaining in the valley 13b evaporate, the water flows out from the cut 13c-1 of the rib 13c along the falling part 13e.
At this time, since the groove 13e-1 is notched in the falling portion 13e, water is guided by the groove 13e-1 and flows down without fail.
In addition, it is preferable that the valley portion 13b is inclined so that the water enemy flows to the other side where the falling portion 13e is located.
[0022]
In this way, by intentionally setting the drain path of the water drops that have fallen on the surface of the waterproof cover 13, the water drops that have fallen from the waterproof cover 13 are transferred to the waterproof area of the junction box 10 (for example, the connector housing section). It can be prevented from flooding.
[0023]
【The invention's effect】
As is apparent from the above description, according to the present invention, since the waterproof cover made of synthetic resin is attached as the cover of the electric connection box, waterproofing can be stably achieved as compared with the conventional waterproof sheet.
Also, when assembling the waterproof cover, simply slide the two wall portions of the waterproof cover between the two side walls of the bracket, and the protruding shaft member is pushed by the bracket wall portion and the shaft is contracted by the spring contraction. Since it is accommodated in the housing portion and is in a non-projecting state, the shaft of the waterproof cover does not hinder the mounting operation. Then, when the shaft member of the waterproof cover and the locking hole of the bracket match, the shaft member is automatically projected by a spring and fitted and locked in the locking hole. Therefore, workability when attaching the waterproof cover to the bracket can be improved.
[0024]
In addition, since the tip corner of the shaft member has a curved surface or a tapered shape, the protruding shaft member is inserted without being caught in the insertion port on the bracket side, and the shaft member is smoothly moved into the shaft housing portion. be able to.
Further, when the waterproof cover is rotatably attached and the connector housing on the side of the case cannot be fitted when the case is rotated to the side of the case, when the second connector is fitted. In addition, the waterproof cover must be turned to the upper surface side of the case, so that forgetting to return the turning waterproof cover can be prevented.
[Brief description of the drawings]
FIG. 1 is a front view of a junction box (electric junction box) according to an embodiment of the present invention in which a bracket and a waterproof cover are attached.
FIG. 2 is a right sectional view of FIG.
3A is a front view of a waterproof cover, FIG. 3B is a side view, and FIGS. 3C and 3D are enlarged views of a main part.
FIG. 4 is a front view of a bracket.
5A is a cross-sectional view when the waterproof cover is inserted into the bracket, and FIG. 5B is a cross-sectional view after insertion locking.
FIG. 6 is a sectional view of a main part showing a modification.
FIG. 7 is a drawing showing a conventional example.
[Explanation of symbols]
10. Junction box (electric junction box)
11 Case 11a Side surface 11a-1 Connector accommodating portion 11b Upper surface 11b-1 Connector accommodating portion 12 Bracket 12c Slide groove 12d Locking hole 13 Waterproof cover 13f Shaft housing chamber 13g Wall portion 14 Shaft member 14b Curved surface portion S Spring

Claims (3)

A bracket is provided on the upper surface side of the case of the electric connection box, and a waterproof cover made of synthetic resin is attached to the bracket,
The waterproof cover projects the wall vertically from both sides of the substantially plate-shaped main body, accommodates the shaft member via a spring in a shaft accommodating chamber recessed in the wall, and attaches the shaft member. While biasing to a protruding state,
The bracket has a mounting portion protruding from the vehicle body, and a locking hole for a shaft member of the waterproof cover is formed inside the opposing wall,
The two walls of the waterproof cover are slidably fitted between the two walls of the bracket, and the shaft member of the waterproof cover is moved inward by contracting the spring at the wall of the bracket to accommodate the shaft. In the department,
When the shaft member of the waterproof cover and the locking hole of the bracket coincide with each other, a spring is extended and the shaft member is fitted and locked in the locking hole. Cover mounting structure. The mounting structure for a waterproof cover of an electrical junction box according to claim 1, wherein a corner portion of the distal end of the shaft member of the waterproof cover has a curved surface or a tapered shape. The waterproof cover covers the upper surface of the case by being rotatably attached to a bracket for fixing the electric connection box to a vehicle body,
The first connector is fitted into the connector accommodating portion on the upper surface of the case while the connector accommodating portion on the side surface of the case is disengaged by rotating the waterproof cover toward the side surface of the case. The mounting structure for a waterproof cover of an electric connection box according to claim 1 or 2, wherein the second connector is fitted into the connector accommodating portion on the side surface of the case by rotating to the side.

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