CN1525613A

CN1525613A - Waterproof structure of electric junction box

Info

Publication number: CN1525613A
Application number: CNA2004100050238A
Authority: CN
Inventors: 江川雅利; 宏; 杉浦智宏
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 2003-02-21
Filing date: 2004-02-12
Publication date: 2004-09-01
Anticipated expiration: 2024-02-12
Also published as: JP2004254479A; CN100553058C

Abstract

To provide a waterproof structure of an electric junction box wherein a waterproof property can be enhanced by a simple construction. The body 20 of an electric junction box 10 is provided with external double walls 24a and 24 so that fitting edges 32a of covering members 30f and 30r positioned on the front side and the rear side of the electric junction box 10 are covered therewith. The external double walls 24a and 24 are so provided that the covering members 30f and 30r are contained therein. Thus, moisture that dropped on the front side of the electric junction box 10 flows outside the covering members 30f and 30r, and the moisture is prevented from entering the electric junction box 10. Even if moisture flows to the body 20 side along the covering members 30f and 30r, and enters the external double walls 24a and 24, the ingress of the moisture into the electric junction box 10 is prevented by the inner wall of the external double walls 24a and 24 provided on the body 20. Therefore, a waterproof effect is enhanced. (C)2004,JPO&NCIPI.

Description

The waterproof construction of electrical junction box

Technical field

The present invention relates to the waterproof construction of electrical junction box.

Background technology

Generally, use is arranged on enging cabin at the electrical junction box of the electric wiring of automobile more, but situation about being located in the car is also arranged.

At this moment, seldom directly contact with water, but carry out these years to car in carry out the situation of wet-cleaned (washing) and when in car, beverage being done to spill during diet and the air-conditioning pipe occur also requiring to prevent in the water immersion car under the situation of dewfall etc.

At the problems referred to above, as shown in Figure 6, open clear 55-129479 communique (with reference to the 1st page, Fig. 1) in fact and disclose the electrical junction box 100 that constitutes by body 101 and cover 102, and formation makes water not immerse an example of the waterproof construction 103 between body 101 and the cover 102.

Promptly as shown in Figure 7, the framework 104 of L i section is set on the perisporium 101a of body 101, forms endless groove 105 between the perisporium 101a of this framework 104 and body 101, the nappe 106 that covers framework 104 is set around cover 102 simultaneously.

Then, between the vertical base portion of framework 104 and nappe 106, leave suitable space, and the hang plate 107 of front end near the perisporium 101a of body 101 is set at the ora terminalis of nappe 106.

But, even in described electrical junction box 100,, between body 101 and cover 102, produce the gap when body 101 and cover 102 is shaped the back because " contraction " produces when being out of shape, also may immerse moisture content.

In order to address this problem, the spy opens the example that flat 11-41748 communique (with reference to the 1st, 3 page, Fig. 1) discloses waterproof construction as shown in Figure 8.

That is, this electrical junction box 110 is made of loam cake 111 and lower cover 112, forms skirt section 113 in the periphery bottom of loam cake 111, and forms the embeded slot 114 on inaccessible top.So that the perisporium 112a of lower cover 112 upper ends is entrenched in the embeded slot 114, and loam cake 111 is covered on the lower cover 112.Like this, form three layers of wall, realized water-proof function by skirt section 113 and lower cover 112.

But, in described electrical junction box 110, owing to carry out simultaneously as the lower cover 112 of body with as the location and the waterproof of the loam cake 111 of cover, so when lower cover 112 and loam cake 111 have " contraction " distortion, can produce lower cover 112 top perisporium 112a as shown in Figure 9 and hang on the step 113a in the middle of the skirt section 113 of loam cake 111, and make chimeric trouble mutually.

Summary of the invention

The purpose of this invention is to provide the waterproof construction that can improve the electrical junction box of water resistance by simple structure.

For reaching described purpose, the waterproof construction of electrical junction box of the present invention has: the terminal box body, and it has first perisporium that peristome is set; Cover, its chimeric described terminal box body, and have first that covers described peristome and the second portion that covers this perisporium outside extending setting with the described first perisporium parallel direction; In described first perisporium, the position of upside at least at the electrical junction box that is positioned at the state of setting forms second perisporium so that and the described first perisporium parallel direction extend to be provided with and and this first perisporium between form the gap of at least a portion of the second portion of described cover embedding.

In this structure, the moisture content in that the electrical junction box upside drips by the flows outside of cover, can prevent that moisture content from immersing electrical junction box inside.

Even moisture content flows to the inboard of second perisporium along cover, also can stop moisture content to immerse to electrical junction box is inner by first perisporium.

The second portion of described cover preferably is at least 5mm to the chimeric length in described gap.

Like this, in the double wall part that is formed by first perisporium and second perisporium, it is long that body and cover overlap length in chimeric direction, so waterproof reliably.

Described second perisporium also can extend the position of the first that is set to corresponding described cover.

Like this, because second perisporium covers the second portion of cover on full duration, so moisture content is difficult to can improve water resistance attached on the cover.

At least following structure also can be adopted in the position that is positioned at upside of described electrical junction box: promptly, and in the bight of described terminal box body, to the re-entrant angle portion of the inboard depression of this terminal box body.

Be detained moisture content when re-entrant angle portion is positioned at upside easily,, can improve the water resistance at this position by described double-wall structure being set in re-entrant angle portion.

Description of drawings

Fig. 1 is the exploded perspective view of waterproof construction one embodiment of expression electrical junction box of the present invention;

Fig. 2 is the amplification profile that is illustrated in the outside double wall portion of II-II line position among Fig. 1;

Fig. 3 is the amplification profile of the variation of the outside double wall of expression portion;

Fig. 4 is the front elevation of expression electrical junction box user mode;

Fig. 5 is the key diagram that is illustrated in the bight formation re-entrant angle portion situation of electrical junction box;

Fig. 6 is the stereogram of an example of the electrical junction box of prior art;

Fig. 7 is the profile of the VII-VII line position of Fig. 6;

Fig. 8 is another routine stereogram of the electrical junction box of expression prior art;

Fig. 9 is the profile of the problem points of the electrical junction box in the presentation graphs 8.

Embodiment

Below describe the example of the waterproof construction of electrical junction box of the present invention with reference to the accompanying drawings in detail.

As shown in Figure 1, electrical junction box 10 of the present invention has: body 20, and it has peristome 21f, 21r on the two sides, front and back; A pair of

cover

30f, 30r, it is entrenched togather, with the front and back peristome 21f that covers this body 20, two outsides of 21r.Body 20 and cover 30f, 30r etc. are generally formed by synthetic resin.This electrical junction box 10 with two peristome 21f, the 21r of for example body 20 roughly along the state of vertical plane and be used.

Be provided for installing the electric component folding and unfolding district 22 of various electric components in the inside of body 20, be located at the both sides, front and back of chimeric direction (direction of arrow among Fig. 1) as

cover

30f, 30r in its periphery body wall portion 23.

In body wall portion 23, under the user mode of electrical junction box 10, becoming the 23U of body wall portion of upside at least, constitute the outer wall 24a of outside double wall portion and inwall 24b two direction settings before and after separately.

In addition, also can outer wall 24a and inwall 24b be set full week.

As shown in Figure 1, inboard cover 30r, for the peristome 21r that covers described body 20 inboards has the base plate 31r that is roughly rectangle, in the periphery of this base plate 31r, wall 32r and base plate 31r at right angles (chimeric direction) are provided with.

Different places on wall 32r are provided with breach 33a, 33b, prevent and be located at the interference of installation bracket 34 in the electric component folding and unfolding district 22 of body 20, and have the electric wire connecting junction lid that covers the electric wire connecting junction that is installed in electric component folding and unfolding district 22.

In addition, for the peristome 21f of the face side that covers body 20, the cover 30f of face side has the shape identical with the cover 30r of described inboard, and in the periphery of base plate 31f, wall 32f is along chimeric direction setting.

In addition, on cover 30f, interfere for the electric component that prevents and be located in the electric component folding and unfolding district 22, the shape of corresponding electric component is provided with recess 35 and breach 36a, 36b.

As shown in Figure 2, between outer wall 24a and inwall 24b, be provided with certain clearance 25 by the outside double wall portion that is located at that outer wall 24a on the body 20 and inwall 24b constitute, in this gap 25, by the chimeric ora terminalis 32a of the front end of

chimeric wall

32f, 32r as

cover

30f, 30r respectively,

cover

30f, 30r are placed structure between outer wall 24a and the inwall 24b and form.

In addition, at the lateral surface of inwall 24b embedding is set and ends projection 26, prevent that the embedding anti-avulsion of

cover

30f, 30r from falling.

In addition, as shown in Figure 2, outer wall 24a conduct and the wall 32f of

cover

30f, 30r, the length L that 32r overlaps will guarantee more than 5mm at least.

As shown in Figure 3, the root as the front end 24c of the outer wall 24a of chimeric direction end preferably can arrive

cover

30f, 30r promptly arrives the position of the lateral surface 31a of base plate 31f, 31r, and covers the whole width of the outside of

cover

30f, 30r.

More than, waterproof construction according to described electrical junction box, because in the outside double wall portion that the user mode setting is made of outer wall 24a on the body 20 that is being positioned at upside and inwall 24b,

cover

30f, 30r are entrenched between outer wall 24a and the inwall 24b, so can improve the water resistance between body 20 and cover 30f, the 30r.

In addition, the waterproof construction of electrical junction box of the present invention is not limited to described embodiment, can carry out suitable distortion, improvement.

For example,, the situation of the wall 23U of the upside of body 20 being arranged to approximate horizontal and using has been described, but equally also can as shown in Figure 4 the state of the such up inclination in bight 27 has been used at described each embodiment.At this moment, can form the double wall bilge construction equally at the 23U of both sides body wall portion, the 23U that clip bight 27 and the described upside body wall 23U of portion.

In addition, as shown in Figure 5, imagination forms the re-entrant angle portion 28 of depression to the inside in the bight 27 of electrical junction box 10, in use this re-entrant angle portion 28 is configured under the situation of upside, can form the double wall bilge construction in re-entrant angle portion 28 at least.

Can improve water resistance like this in the re-entrant angle portion 28 of easy occluded water.At this moment, the 23U of body wall portion, the 23U in re-entrant angle portion 28 both sides also realizes waterproof as dual structure.

In addition, as shown in Figure 1, illustrated on the two sides, front and back of body 20 at described embodiment peristome 21f, 21r have been set, cover the situation of two peristome 21f, 21r by a pair of

cover

30f, 30r, in addition, be equally applicable to only peristome 21 is set, and cover the situation of these peristomes 21 by a cover 30 in the front (or back) of body 20.

At this moment, form double wall portion, the ora terminalis of the wall 32 of cover 30 is entrenched in the gap 25 between outer wall 24a and the inwall 24b outer wall 24a and inwall 24b to be set to the front side of body 20 extension mode.

Claims

1, a kind of waterproof construction of electrical junction box wherein, has:

The terminal box body, it has first perisporium that peristome is set;

Cover, its chimeric described terminal box body, and have first that covers described peristome and the second portion that covers this perisporium outside extending setting with the described first perisporium parallel direction;

In described first perisporium, the position of upside at least at the electrical junction box that is positioned at the state of setting forms second perisporium so that and the described first perisporium parallel direction extend to be provided with and and this first perisporium between form the gap of at least a portion of the second portion of described cover embedding.

2, the waterproof construction of electrical junction box as claimed in claim 1, the second portion of described cover is at least 5mm to the chimeric length in described gap.

3, the waterproof construction of electrical junction box as claimed in claim 2, described second perisporium extends the position of the first that is set to corresponding described cover.

4, the waterproof construction of electrical junction box as claimed in claim 1, the position that is positioned at upside at least of described electrical junction box are formed in the bight of described terminal box body and the re-entrant angle portion of caving in to this terminal box body inboard.