JP2010041778A - Housing for electric apparatus for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a housing for an electronic apparatus for a vehicle, capable of improving waterproofness. <P>SOLUTION: The housing H for an electrical apparatus E for vehicle includes a lower case 10, having an opening portion 12 formed on the upper surface by a longitudinal wall 11, and an upper case 30 fitted to the upper surface side of the lower case 10. A protrusion 20 is provided along the opening edge of the opening portion 12 on the outer peripheral surface of the longitudinal wall 11 of the lower case 10, and a water-preventing wall 35, fitted to the outside of the protrusion 20 and having a lower end portion reaching lower than the lower wall of the protrusion 20, is provided on the lower end of the upper case 30, and the lower surface of the protrusion 20 is made to be an inclined surface 21 which lowers downward, as separating from the outer peripheral surface of the longitudinal wall 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a housing for an electric device for a vehicle mounted on a vehicle.

2. Description of the Related Art Conventionally, an electric junction box disposed in an engine room of an automobile is known as an example of a vehicle electric device (for example, Patent Document 1). The housing of the electrical junction box includes a lower case having an opening formed on the upper surface by a cylindrical vertical wall, and an upper case fitted on the upper surface side of the lower case. In this housing, the lower end portion of the upper case is fitted on the upper end portion of the lower case and overlapped in the inner and outer directions of the housing, thereby preventing water from entering from the fitting portions of both cases.
Japanese Patent Laid-Open No. 2000-4521

  By the way, when the engine room is subjected to high-pressure car washing, since the water pressure is not constant in all car wash machines, the car can be washed with high-pressure injection at a higher water pressure than expected. Then, in the above configuration, there is a concern that water flows into the gap between the fitting portions of the lower case and the upper case and enters the inside of the housing. For this reason, there has been a demand to improve the waterproofness of the housing of the vehicle electrical device.

  The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a housing for an electric device for a vehicle that can improve waterproofness.

  The present invention is a housing for a vehicular electrical apparatus comprising: a lower case having an opening formed on the upper surface thereof by a vertical wall; and an upper case fitted to the upper surface side of the lower case, wherein the lower case On the outer peripheral surface of the vertical wall, a protrusion is provided along the opening edge of the opening, and the lower end of the upper case is fitted to the outside of the protrusion, and the lower end is formed on the protrusion. A water-impervious wall that extends downward from the lower end portion is provided, and the lower surface of the ridge is characterized by an inclined surface that falls downward as the distance from the outer peripheral surface of the vertical wall increases.

  According to such a structure, the water which flew toward the fitting part of an upper case and a lower case hits a water-impervious wall and is bounced back. Further, even if water hitting the outer peripheral surface of the vertical wall of the lower case flows to the opening side along the outer peripheral surface of the vertical wall, the water hits the lower surface of the ridge and falls downward (opening portion) In the opposite direction). Accordingly, it is possible to prevent water from entering through the gap between the fitting portions of the upper case and the lower case, and thus improve the waterproofness of the housing of the vehicle electrical device.

  The vertical wall of the lower case may have an internal fitting wall that rises above the protrusion and fits inside the upper case. According to such a configuration, it is possible to more reliably prevent water from entering from the fitting portion between the upper case and the lower case, so that the waterproof property of the housing of the vehicle electrical device can be further improved. .

  ADVANTAGE OF THE INVENTION According to this invention, the housing of the electric equipment for vehicles which can aim at a waterproof improvement can be provided.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
The vehicle electrical device E in the present embodiment is a relay box disposed in an engine room of an automobile, and includes a power source (not shown) such as a battery, and on-vehicle electrical components (not shown) such as a headlamp and a wiper. Connected to each other, and performs energization and disconnection of various in-vehicle electrical components. Various electrical components (not shown) such as relays and connectors are accommodated in the housing H of the vehicle electrical device E. Hereinafter, in each component member, the upper side in FIG. 1 will be described as the upper side, and the lower side as the lower side.

The housing H includes a lower case 10 in which an opening 12 is formed on the upper surface by a vertical wall 11 that is continuous in a cylindrical shape, and an upper case 30 that fits on the upper surface side of the lower case 10.
The lower case 10 is made of a synthetic resin, and as shown in FIG. 2, the lower case 10 includes a bottom wall 13 and a vertical wall 11 standing upward from the peripheral edge thereof, and is formed in a container shape having an upper surface side opened. The planar shape is substantially rectangular (see also FIG. 4). The bottom wall 13 of the lower case 10 as a whole has an inclination that gradually rises from one end side in the longitudinal direction toward the other end side (the right side to the left side in FIG. 3). Further, the portion of the bottom wall 13 of the lower case 10 that is arranged on the lower side due to the inclination in the longitudinal direction has an inclination that rises from one end side in the short direction toward the other end side (left side to right side in FIG. 5). ing.

  The vertical wall 11 includes a long portion 14 that rises from both edges extending in the longitudinal direction of the peripheral edge of the bottom wall 13 and a short portion 15 that rises from both edges extending in the short direction. Thereafter, of the longitudinal portions 14 of the vertical wall 11, the longitudinal portion 14 disposed on the high side due to the inclination of the bottom wall 13 in the short direction is the high-order longitudinal portion 14U, and the longitudinal portion 14 disposed on the low side is the low-order longitudinal portion. 14S (see FIG. 5). Of the short portions 15 of the vertical wall 11, the short portion 15 arranged on the high side due to the inclination of the bottom wall 13 in the longitudinal direction is the high short portion 15 U, and the short portion 15 arranged on the low side is low. This is referred to as a short portion 15S (see FIG. 2).

  The height dimension of substantially half of the longitudinal portion 14 of the vertical wall 11 on the higher short side 15U side is substantially constant, and the upper end edge of this portion has a shape that descends along the inclination of the bottom wall 13 in the longitudinal direction. (See FIG. 3). In addition, the height dimension of substantially half of the longitudinal portion 14 of the vertical wall 11 on the lower short portion 15S side is gradually increased toward the lower short portion 15S, and the upper edge of this portion is substantially horizontal. ing. The upper end edge of the high-order longitudinal portion 14U and the upper end edge of the low-order longitudinal portion 14S are arranged at substantially the same height (see FIG. 5).

  Among the short portions 15 of the vertical wall 11, the higher short portion 15U has a substantially constant height dimension, and the upper edge of this portion is substantially horizontal (see FIG. 2). Of the short parts 15 of the vertical wall 11, the lower short part 15S is gradually increased in height from the high-order long part 14U toward the low-order long part 14S, and the upper edge of this part is substantially horizontal. .

  A harness insertion hole 16 is provided in the vertical wall 11. As shown in FIG. 4, the harness insertion hole 16 is provided at a substantially central position in the longitudinal direction of the lower longitudinal portion 14 </ b> S and a position near the lower longitudinal portion 14 </ b> S in the lower lateral short portion 15 </ b> S. The harness insertion hole 16 is notched downward from the upper edge of the vertical wall 11, and a harness lead-out path 17 extending toward the outside of the housing H is provided at the lower edge of the harness insertion hole 16. . Further, ribs 18 are erected from both side edges of each harness insertion hole 16 to both side edges of the harness lead-out path 17 (see FIG. 2). In addition, the rib 18 is inserted in the groove part 32A of the harness cover part 32 with which the upper case 30 was equipped (refer FIG. 9).

  A plurality of lock pieces 19 that are engaged with the upper case 30 are provided at the upper end of the vertical wall 11. Each lock piece 19 has a shape extending upward from the outer peripheral surface of the vertical wall 11, and is elastically deformable in the approaching / separating direction with respect to the vertical wall 11 (see FIG. 5).

  The upper case 30 is made of synthetic resin and includes a peripheral wall 31 that rises upward from the vertical wall 11 of the lower case 10. The upper case 30 is formed in a substantially cylindrical shape having an upper surface and a lower surface opened, and has a substantially rectangular shape that matches the lower case 10 in a plan view. Further, the lower end portion of the upper case 30 is inclined to gradually fall from one end side in the longitudinal direction toward the other end side as a whole in accordance with the shape of the lower case 10.

The upper case 30 has a component accommodating portion 37 that accommodates various electrical components. Further, the upper case 30 is provided with a harness cover portion 32 that covers the harness insertion hole 16 of the lower case 10 and the open side of the harness lead-out path 17.
As shown in FIG. 9, the upper case 30 is covered with a cover C that closes the upper opening of the upper case 30, and the cover C and the upper case 30 are sealed with a packing (not shown). Yes.

  Now, on the outer peripheral surface of the vertical wall 11 of the lower case 10, a ridge 20 is projected along the opening edge of the opening 12. The protrusion 20 is provided at a position below the opening edge of the opening 12 by a predetermined dimension, in other words, at a height position of the upper end of the lock piece 19 (see FIG. 5).

  The protrusion 20 protrudes outward from the outer peripheral surface of the vertical wall 11, and the protruding dimension is slightly larger than the thickness dimension of the vertical wall 11 of the lower case 10. The ridge 20 has substantially the same cross section over the entire circumference of the opening of the lower case 10, and the shape thereof is substantially trapezoidal. The upper surface of the ridge 20 is substantially perpendicular to the wall surface of the vertical wall 11, and the outer peripheral surface of the ridge 20 is substantially parallel to the wall surface of the vertical wall 11. In addition, the lower surface of the ridge 20 is an inclined surface 21 that is inclined downward as the distance from the outer peripheral surface of the vertical wall 11 decreases.

  The vertical wall 11 of the lower case 10 has an inner fitting wall 22 that rises above the ridge 20 and fits inside the upper case 30. The inner fitting wall 22 has a form in which a portion below the protrusion 20 in the vertical wall 11 is raised as it is, and the wall thickness dimension of the inner fitting wall 22 is the wall of the other portion of the vertical wall 11. It is substantially the same as the thickness dimension. The height dimension of the inner fitting wall 22 is substantially constant over the entire circumference of the opening 12. A taper portion 23 is formed on the upper surface of the inner fitting wall 22, and is inclined downward.

  On the other hand, an outer fitting wall 33 that fits outside the inner fitting wall 22 of the lower case 10 is provided at the lower end of the upper case 30 (see FIG. 10). The outer fitting wall 33 has a height dimension equivalent to the height dimension of the inner fitting wall 22 and a wall thickness dimension equivalent to the wall thickness dimension of the inner fitting wall 22. The inner fitting wall 22 and the outer fitting wall 33 are arranged so as to overlap in the inner and outer directions of the housing H over substantially the entire circumference of the opening 12 of the lower case 10. The inner fitting wall 22 and the outer fitting wall 33 face each other substantially in parallel and are arranged close to each other.

  The lower end of the external fitting wall 33 is a contact surface 34 that abuts against the upper surface of the protrusion 20 of the lower case 10 over substantially the entire circumference. The contact surface 34 is substantially perpendicular to the inner and outer surfaces of the outer fitting wall 33. The upper case 30 is held at a predetermined height with respect to the lower case 10 by the contact surface 34 contacting the upper surface of the ridge 20.

  Further, a water-impervious wall 35 fitted to the outside of the protrusion 20 is provided on the lower end of the upper case 30 over substantially the entire circumference. The water-impervious wall 35 is configured to hang downward from the outer surface of the lower end of the outer fitting wall 33, and is disposed along the outer surface of the ridge 20 (overlapping the ridge 20). The wall thickness dimension of the water shielding wall 35 is substantially the same as the wall thickness dimension of the outer fitting wall 33. Moreover, the height dimension of the impermeable wall 35 is set to a dimension equivalent to the height dimension of the outer fitting wall 33, in other words, approximately twice the height dimension of the outer surface of the protrusion 20. The lower end portion of the water-impervious wall 35 reaches below the lower end portion of the ridge 20 and is close to the root position of the lock piece 19 of the lower case 10 (the connection position between the lock piece 19 and the vertical wall 11) (FIG. 9). reference).

  At the lower end of the water-impervious wall 35, lock protrusions 36 that are engaged with the lock pieces 19 are provided at a plurality of locations corresponding to the lock pieces 19 (see FIG. 8). The lock protrusion 36 is provided so as to protrude outward from the outer surface of the water shielding wall 35. And the lower case 10 and the upper case 30 are assembled | attached integrally by the lock piece 19 elastically engaging with the lock protrusion 36 of the water-impervious wall 35 fitted to the outer side of the protrusion 20 from the outer side. Locked (see FIG. 9).

According to the present embodiment configured as described above, the following effects can be obtained.
The housing H of the vehicle electrical device E according to the present embodiment has a protrusion 20 protruding along the opening edge of the opening 12 on the outer peripheral surface of the vertical wall 11 of the lower case 10, and at the lower end of the upper case 30. A water-impervious wall 35 that is fitted to the outer side of the ridge 20 and has a lower end that extends below the lower end of the ridge 20 is provided. The inclined surface 21 is used.

  Therefore, when the engine room is subjected to high-pressure washing, the washing water scattered toward the fitting portion between the upper case 30 and the lower case 10 hits the water shielding wall 35 and is bounced back. Here, in the case where the water shielding wall 35 is not provided and the gap between the upper case and the lower case is opened to the side, the washing water can directly jump into the gap. There is concern about the ingress of water. However, in this embodiment, by providing the water shielding wall 35, the outer side of the gap between the upper case 30 and the lower case 10 (the gap formed between the ridge 20 and the outer fitting wall 33) is covered. Therefore, it is possible to prevent the cleaning water from jumping into the gap.

Further, when the washing water hits the outer peripheral surface of the vertical wall 11 of the lower case 10 with vigorous force, the cleaning water flows in four directions along the outer peripheral surface of the vertical wall 11. Of these, the water flowing upward (on the opening 12 side of the lower case 10) hits the lower surface (inclined surface 21) of the ridge 20, and is guided downward (in the direction opposite to the opening 12) by the inclination. Then, the water transmitted through the inclined surface 21 of the ridge 20 reaches the inner surface of the impermeable wall 35 and is discharged to the lower side of the impermeable wall 35 along the inner surface. Therefore, it is possible to prevent the water flowing along the outer peripheral surface of the vertical wall 11 of the lower case 10 from flowing into the gap between the water shielding wall 35 and the protrusion 20.
That is, according to the present embodiment, water can be prevented from entering through the gap between the fitting portions of the upper case 30 and the lower case 10, so that the waterproof property of the housing H of the vehicle electrical device E is improved. Can do.

  In addition, water can be prevented from entering the inside of the housing H by a water wall formed by the flow of high-pressure jet water. And the housing H will be in the state sealed by this water wall, and since the exterior of the housing H becomes a negative pressure compared with an inside, the effect which prevents flooding can further be improved.

  Further, the vertical wall 11 of the lower case 10 has an inner fitting wall 22 that rises above the protrusion 20 and fits inside the upper case 30. As a result, even if water enters the gap between the impermeable wall 35 and the protrusion 20, if the water does not rise substantially vertically to the upper end of the inner fitting wall 22, the inside of the housing H (lower case) 10), the intrusion of water can be prevented more reliably and the waterproofness of the housing H can be further improved. .

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

(1) In the above embodiment, the case where the present invention is applied to the housing H of the relay box has been described. However, the present invention is not limited to this, and the present invention can be applied to the housing of various electric devices for vehicles.
(2) In the above-described embodiment, the protrusion 20 is provided at a position below the opening edge of the opening 12 by a predetermined dimension. However, the protrusion is not limited thereto, and the protrusion is the position of the opening edge of the opening. May be provided.

Side view of housing according to this embodiment Perspective view of lower case Side view Top view Partially cutaway sectional view at the AA position in FIG. Side view of upper case Bottom view BB sectional view of FIG. Sectional view showing the cover on the housing Schematic showing the fitting part between the upper case and the lower case

Explanation of symbols

E ... Vehicle electrical equipment H ... Housing 10 ... Lower case 11 ... Vertical wall 12 ... Opening portion 20 ... Rid 21 ... Inclined surface 22 ... Internal fitting wall 30 ... Upper case 35 ... Water shielding wall

Claims (2)

A housing for a vehicle electrical device comprising: a lower case having an opening formed on an upper surface thereof by a vertical wall; and an upper case fitted to the upper surface side of the lower case,
On the outer peripheral surface of the vertical wall of the lower case, a protrusion is provided along the opening edge of the opening,
The lower end of the upper case is provided with a water-impervious wall that is fitted to the outside of the ridge and the lower end reaches below the lower end of the ridge,
A housing for an electric device for a vehicle, wherein the lower surface of the ridge is an inclined surface that is lowered downward as it is farther from the outer peripheral surface of the vertical wall. The vertical wall of the lower case includes an inner fitting wall that rises above the protrusion and fits inside the upper case.

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