JP2004328842A - Electric connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connection box which can prevent a fault due to water even when water enters a case. <P>SOLUTION: This electric connection box 1 contains relays 6 in the case 7, a fuse mounting part 8b provided in the case 7 and at the upper position of the relays 6, and a fuse 9 detachably mounted at the fuse mounting part 8b above the case 7. The electric connection box 1 includes in the case 7 an inner cover 5 for covering the outer periphery of the relays 6 and a bus bar supporting resin 13, a drain route 20 provided on the outer surface of the inner cover 5 and the bus bar supporting resin 13, and drain ports 23, 24 provided out of the case 7 for draining the water flowing through the drain route 20 in the case 7. The drain route 20 is formed on the upper surface side of the bus bar supporting resin 13. The bottom communicates with the upper surface concave groove 21 of the oblique surface 21a and with the lowermost part of the oblique surface 21a of the upper surface groove 21, and with a side surface concave groove 22 formed on the side face of the inner cover 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric junction box that accommodates a fuse and a relay component in a case.
[0002]
[Prior art]
As this type of conventional electric connection box, there is one disclosed in Patent Document 1. As shown in FIG. 4, the electric connection box 50 includes a case 51 in which a relay component 52 is housed, and a fuse mounting portion 53 provided in the case 51 and above the relay component 51. The fuse 54 is detachable from the fuse mounting portion 53 from above the case 51.
[0003]
According to the electric connection box 50, there is an advantage that the state of the fuse 54 can be checked and the fuse 54 can be replaced from above the case 51.
[0004]
[Patent Document 1]
German Offenlegungsschrift 32 09 915 [0005]
[Problems to be solved by the invention]
However, in the conventional electric connection box 50, since the fuse mounting portion 53 is disposed in an exposed state on the upper surface side of the case 51, it is possible to prevent water droplets and the like due to condensation from entering the case 51 from the fuse mounting portion 53. Absent. When water enters the case 51, there is a problem that a failure occurs due to the water being applied to the relay component 52 or the like.
[0006]
Then, this invention is made in order to solve the above-mentioned subject, and an object of this invention is to provide the electric junction box which can prevent a failure by water even if water enters into a case.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is characterized in that a relay component is accommodated in a case, and a fuse mounting portion is provided in the case and at a position above the relay component, and the fuse mounting portion is provided above the case. An electrical junction box in which a fuse is more detachable, wherein a waterproof wall that covers an outer periphery of the relay component is provided in the case, and a drain path for flowing water downward is provided on an outer surface of the waterproof wall. The case is provided, and the case is provided with a drain port for discharging water flowing through the drain path to the outside of the case.
[0008]
In this electrical junction box, when water droplets or the like due to condensation enter the inside of the case from the fuse mounting portion, the water is drained to the outside through the drain port of the case through the drain passage in the case.
[0009]
According to a second aspect of the present invention, in the electrical junction box according to the first aspect, the drain path is formed on an upper surface side outside the waterproof wall, and water that has entered from the fuse mounting portion flows in, and the bottom surface has a lower surface. It is characterized by comprising an upper surface groove which is an inclined surface, and a side groove formed on the outer side surface of the waterproof wall and communicating with the lowermost part of the inclined surface of the upper surface groove.
[0010]
In this electric junction box, in addition to the operation of the first aspect, a drain channel can be created by forming the upper surface groove and the side groove on the outer surface of the waterproof wall.
[0011]
The invention according to claim 3 is the electrical junction box according to claim 2, wherein the drain port is a lower drain port opened at the lowest position of the side groove.
[0012]
In this electric connection box, in addition to the effect of the second aspect, all the water that has entered the case can be reliably drained to the outside of the case.
[0013]
According to a fourth aspect of the present invention, in the electrical junction box according to the third aspect, the drain port is an upper drain port opened at a lowermost position of the inclined surface.
[0014]
In this electric connection box, in addition to the effect of the invention of claim 3, water flowing on the inclined surface of the upper groove can be drained out of the case without flowing into the side groove.
[0015]
The invention according to claim 5 is the electrical junction box according to any one of claims 1 to 4, wherein the waterproof wall is a busbar supporting resin body that supports the other busbar, and the busbar supporting resin body is closer to the relay component. And an inner cover attached to the inner cover.
[0016]
In this electric junction box, the same operation as the operation of the invention of claims 1 to 4 can be obtained.
[0017]
The invention according to claim 6 is the electrical junction box according to claim 5, wherein the busbar supporting resin body and the internal cover overlap each other at a portion where the busbar supporting resin body and the internal cover overlap with each other. It is characterized in that a shape space is formed.
[0018]
In this electric junction box, in addition to the operation of the fifth aspect of the present invention, the busbar supporting resin body and the inner cover overlap because the busbar supporting resin body and the inner cover form a substantially wedge-shaped space that expands downward. When a water droplet flows into the portion, the substantially wedge-shaped space prevents the water droplet from entering the gap.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0020]
1 to 3 show an embodiment of the present invention. FIG. 1 is an exploded perspective view of an electric connection box 1, FIG. 2 is a partially cutaway front view of the electric connection box 1, and FIG. It is a line sectional view.
[0021]
As shown in FIGS. 1 to 3, the electric connection box 1 includes a busbar assembly 4 to which one busbar 2 and the other busbar 3 are assembled, and a busbar assembly 4 that is assembled to the busbar assembly 4. , A busbar 2, a busbar assembly 4, and a case 7 in which the internal cover 5 is accommodated, a fuse cavity 8 to be assembled above the case 7, and a protruding portion provided in the fuse cavity 8. And four fuses 9 attached to the fuse terminals 11 and 18 thus set. An arrow 30 in FIG. 3 indicates a state in which water that has entered the case 7 from the fuse mounting portion 8b is discharged through a drainage path inside the electric connection box 1.
[0022]
The bus bar 2 is formed by press-molding a rigid conductive sheet metal into a predetermined shape, a power terminal 10 is formed at a lower end, and a fuse terminal 11 is formed at four positions at an upper end.
[0023]
The busbar assembly 4 is formed by press-molding a rigid conductive sheet metal into a predetermined shape to form an integral prototype busbar, and insert molding the busbar support resin body 13 into the integral prototype busbar to produce an insert molded product. Then, a predetermined portion of the integral prototype bus bar of the insert molded product is cut to form the other bus bar 3 which is a desired relay wiring path body, and the coil 6a and the switch 6b of the relay component 6 are fixed to the other bus bar 3. Created. The bus bar assembly 4 thus produced has four sets of control terminals 16 and output terminals 17 formed at the lower end, and fuse terminals 18 formed at four places at the upper end.
[0024]
The inner cover 5 is assembled to the busbar supporting resin body 13 on the side of the relay component 6. The inner cover 5 and the busbar supporting resin body 13 cover the entire outer periphery of the coil 6 a and the switch 6 b of the four sets of relay components 6. That is, the inner cover 5 and the busbar supporting resin body 13 are configured as a waterproof wall that covers the entire periphery of the four relay components 6.
[0025]
The case 7 has a rectangular parallelepiped shape in which an upper surface side and a lower surface side are penetrated, and a lower portion is formed as a connector cavity 7a. In the case 7, one bus bar 2 and the other bus bar 3 are housed in an assembled state from an opening on the upper surface side. The power supply terminal 10 of one bus bar 2 and the four control terminals 16 and the output terminal 17 of the other bus bar 3 are arranged in the connector cavity 7a.
[0026]
The fuse cavities 8 are mounted on the upper surface side of the case 7, and are formed at four positions of the plate portion 8 a for closing the opening of the upper surface of the case 7 and the plate portion 21, and arranged at positions facing the fuse terminals 11 and 18 of each set. And a mounted fuse mounting portion 8b. An operator can attach and detach the fuse 9 from above the case 7 to each of the fuse mounting portions 8b.
[0027]
A drain passage 20 for flowing water downward is formed on the outer surfaces of the inner cover 5 and the busbar supporting resin body 13 which are the waterproof walls. The drainage path 20 is formed on the upper surface outside the busbar supporting resin body 13, and the water that has entered from the fuse mounting portion 8 b flows in, and the upper surface concave groove 21 having the inclined surface 21 a on the bottom surface. It is formed of a side groove 22 which is communicated with the lowermost part of the inclined surface 21a and is formed on the outer side surface of the inner cover 5. In addition, the case 7 is provided with a lower drain port (drain port) 23 and an upper drain port (drain port) 24 for discharging water flowing through the drain path 20 to the outside of the case 7, and is provided vertically below the lower drain groove 24. An extended groove is formed. The upper drain port 24 is opened at the lowest position of the inclined surface 21a of each upper surface concave groove 21 of the bus bar supporting resin body 13 when assembled, and is formed as a through hole penetrating the inner and outer surfaces. The lower drain port 23 is opened at the lowest position of each side groove 22 of the inner cover 5 when assembled.
[0028]
Further, an inclined surface 25 is provided on an outer side surface of the inner cover 5 at a portion where the bus bar supporting resin body 13 and the inner cover 5 overlap, and the bus bar supporting resin body 13 and the inner cover 5 form a substantially wedge-shaped space 26 expanding downward. Is formed.
[0029]
In the electric junction box 1, water drops are generated at a position above the electric connection box 1 due to dew condensation, or water is scattered at a position above the electric connection box 1 due to being wet by a vehicle, and the fuse mounting portion 8 b More water may enter the case 7. The water that has entered the case 7 from the fuse mounting portion 8b flows into the upper groove 21 of the busbar supporting resin body 13 and flows down the inclined surface 21a of the bottom surface by its own weight. Then, when reaching the lowermost position of the inclined surface 21a, the water is drained to the outside of the case 7 through the upper drain port 24 of the case 7. Water not drained from the upper drain port 24 flows down the side groove 22 of the inner cover 5 by its own weight, and when reaching the lowest position, is drained to the outside of the case 7 from the lower drain port 23 of the case 7. . As described above, even if water enters the case 47, the relay component 6 and the like do not get wet, so that a failure due to the water can be prevented.
[0030]
In the above embodiment, the drainage path 20 is formed on the upper surface side outside the busbar supporting resin body 13, the water that has entered from the fuse mounting portion 8 b flows in, and the upper surface concave groove 21 whose bottom surface is the inclined surface 21 a is formed. Since the upper surface groove 21 is formed of a side groove 22 formed on the outer side surface of the inner cover 5 and communicated with the lowermost portion of the inclined surface 21 a of the upper surface groove 21, the upper surface groove 21 And the drainage channel 20 can be created by forming the side groove 22 on the outer surface of the inner cover 5. Therefore, the drainage channel can be formed by only slightly changing the shape of the conventional busbar support resin body 13 and the inner cover 5. 20 can be easily created.
[0031]
In the above embodiment, one of the drain ports is the lower drain port 23 opened at the lowest position of the side groove 22, so that all the water that has entered the case 7 can be reliably drained out of the case 7. .
[0032]
In the above embodiment, the other one of the drainage ports is the upper drainage port 24 which is opened at the lowest position of the inclined surface 21a, so that the water flowing through the inclined surface 21a does not flow into the side groove 22 without flowing into the case. Since the water can be drained out of the case 7, the water can be quickly drained out of the case 7. Further, the amount of water passing through the side groove 22 can be reduced, and the probability of the relay component 6 or the like being wet is further reduced.
[0033]
Further, in the above embodiment, the busbar supporting resin body 13 and the slope 25 of the inner cover 5 form the substantially wedge-shaped space 26 that expands downward, so that the busbar supporting resin body 13 and the inner cover 5 overlap each other. When a water droplet flows, the substantially wedge-shaped space 26 prevents the water droplet from entering the gap.
[0034]
In the above embodiment, the waterproof wall is composed of the busbar supporting resin body 13 that supports the other busbar 3 and the internal cover 5 that is assembled to the side of the busbar supporting resin body 13 to which the relay component 6 is fixed. However, it goes without saying that the waterproof wall only needs to cover the entire outer periphery of the relay component 6.
[0035]
【The invention's effect】
As described above, according to the first aspect of the invention, the relay component is housed in the case and the fuse mounting portion is provided at an upper position, and the fuse can be detachably mounted on the fuse mounting portion from above the case. A waterproof wall covering the outer periphery of the relay component is provided in the case, and a drainage path for flowing water downward is provided on the outer surface of the waterproof wall, and the case is provided in the case. Is provided with a drain port for discharging the water flowing through this drain path to the outside of the case.If water droplets or the like due to condensation enter the inside of the case from the fuse mounting part, water passes through the drain path in the case, and the drain port of the case Since the water is further drained to the outside, even if water enters the case, a failure due to being wet can be prevented.
[0036]
According to the second aspect of the present invention, in the electrical junction box according to the first aspect, the drainage path is formed on the upper surface side outside the waterproof wall, the water that has entered from the fuse mounting portion flows in, and the bottom surface is inclined. The invention according to claim 1, wherein the upper surface groove is a surface and the side surface groove formed on the outer side surface of the waterproof wall and communicated with a lowermost portion of the inclined surface of the upper surface groove. In addition to the effect, the drainage channel can be created by forming the upper surface groove and the side groove on the outer surface of the waterproof wall, so the drainage channel can be easily created by slightly changing the design of the outside of the conventional waterproof wall it can.
[0037]
According to the third aspect of the present invention, in the electrical junction box according to the second aspect, the drain port is a lower drain port opened at the lowest position of the side groove. In addition, all the water that has entered the case can be reliably drained outside the case.
[0038]
According to the fourth aspect of the present invention, in the electrical junction box according to the third aspect, the drain port is an upper drain port opened at the lowest position of the inclined surface. In addition, since the water flowing on the inclined surface of the upper groove can be drained out of the case without flowing into the side groove, the water can be quickly drained out of the case. Further, the amount of water passing through the side groove can be reduced, and the probability of the relay parts and the like being wet is further reduced.
[0039]
According to the fifth aspect of the present invention, in the electrical junction box according to any one of the first to fourth aspects, the waterproof wall includes a busbar supporting resin body that supports the other busbar, and a relay component side of the busbar supporting resin body. , The same effect as the function of the invention of claims 1 to 4 can be obtained.
[0040]
According to the sixth aspect of the present invention, when the busbar supporting resin body and the inner cover form a substantially wedge-shaped space that expands downward, a water droplet flows into a portion where the busbar supporting resin body and the inner cover overlap. In addition, the substantially wedge-shaped space prevents water droplets from entering the gap.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention and is an exploded perspective view of an electric junction box.
FIG. 2 shows one embodiment of the present invention, and is a partially cutaway front view of the electric junction box.
FIG. 3 shows one embodiment of the present invention, and is a cross-sectional view taken along line AA of FIG. 2;
FIG. 4 is a sectional view of a conventional electric junction box.
[Explanation of symbols]
1 electrical connection box 3 other busbar 5 inner cover (waterproof wall)
6 Relay parts 7 Case 8b Fuse mounting part 9 Fuse 13 Busbar support resin body (waterproof wall)
Reference Signs List 20 drainage channel 21 upper surface concave groove 21a inclined surface 22 side concave groove 23 lower drain port 24 upper drain port

Claims (6)

A relay component is accommodated in the case, and a fuse mounting portion is provided in the case and at a position above the relay component, and a fuse is detachably attached to the fuse mounting portion from above the case. Electrical junction box,
A waterproof wall covering the outer periphery of the relay component is provided in the case, and a drain path for flowing water downward is provided on the outer surface of the waterproof wall, and the water flowing through the drain path is provided for the case. An electric connection box, wherein a drain port for discharging the case outside is provided. The electrical junction box according to claim 1,
The drainage path is formed on the upper surface side outside the waterproof wall, into which water that has entered from the fuse mounting portion flows, and has an upper surface concave groove having a bottom surface that is an inclined surface. An electric connection box, comprising: a downwardly communicating side groove formed on a side surface outside the waterproof wall. The electrical connection box according to claim 2,
The electrical junction box, wherein the drain port is a lower drain port opened at a lowermost position of the side groove. The electrical connection box according to claim 3, wherein
The electric junction box, wherein the drain port is an upper drain port opened at a lowermost position of the inclined surface. The electrical connection box according to claim 1, wherein:
The electric junction box, wherein the waterproof wall is composed of a busbar supporting resin body for supporting the other busbar, and an internal cover attached to the busbar supporting resin body on the relay component side. The electrical junction box according to claim 5, wherein
An electrical junction box, wherein a substantially wedge-shaped space extending downward is formed by the busbar supporting resin body and the inner cover at a portion where the busbar supporting resin body and the inner cover overlap.

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