JP6253961B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box that is mounted on an automobile and mainly performs power distribution.

  There are various types of electrical junction boxes mounted on automobiles. For example, a frame on which electronic components are mounted, an upper cover attached to the upper surface side of the frame, and a lower cover attached to the lower surface side of the frame; , There is a structure with. Also, in the electrical junction box having such a structure, in order to discharge rainwater that has entered the electrical junction box or water generated by condensation, a drain outlet is provided at the bottom of the electrical junction box, that is, the bottom surface of the lower cover. It is common to form through (for example, refer to Patent Document 1).

JP 2004-064873 A

  On the other hand, the electrical junction box may be fixed to the vehicle body in such a direction that one side surface of the upper cover, the frame, and the lower cover is the lowest part. In this case, it is desirable that the drain port is provided on one side surface of any member of the upper cover, the frame, and the lower cover. However, when a drain outlet is formed through one side of any one member of the upper cover, the frame, and the lower cover, there are the following problems.

  In order to form each member of the upper cover, the frame, and the lower cover, usually, a pair of molding dies that are in contact with and away from each other in the depth direction of the member are used. However, since it is necessary to further use a slide mold that slides in a direction perpendicular to the contact / separation direction of the pair of molding dies, there is a problem that the manufacturing cost increases.

  Furthermore, regardless of the orientation of the electrical junction box when it is fixed to the vehicle body, when the drain port is a simple through hole, water that has bounced off the vehicle body or the like may enter the electrical junction box from the drain port. There was a problem that there was.

  Therefore, an object of the present invention is to provide an electrical junction box that can make it difficult for water to enter the electrical junction box from a drain outlet and can suppress an increase in cost.

  The invention described in claim 1 includes a frame on which an electronic component is mounted and a cover attached to the frame, and an end of the frame-side outer wall and an end of the cover-side outer wall are overlapped. In the electrical junction box, one of the end portion of the outer wall on the frame side and the end portion of the outer wall on the cover side is formed in a concave shape from the overlapping surface with the other, and the one end surface and the overlapping surface A drain opening that is open in two directions is provided, and the drain outlet extends to a location where the opposite side of the end face does not overlap the other, and the drain outlet is provided on the bottom surface in a state of being fixed to the vehicle body. It is an electrical junction box.

  The invention described in claim 2 is the invention described in claim 1, wherein at least a part of the outer wall provided with the drainage port or at least a part of the outer wall closing the drainage port is the drainage. It is characterized by a downward slope toward the mouth.

  According to the first aspect of the present invention, the drain port provided in the bottom surface is not in the vertical direction, but in “one end surface direction (ie, horizontal direction)” and “overlapping surface direction (ie, above)”. Opening in two directions and the end face side of the opening in the overlapping surface direction is blocked by the other, so that the water that bounces off the vehicle body or the like hardly enters the electrical junction box from the drain port. Further, since the drain port is not a through hole, the frame and the cover can be formed by a simple molding die, and the cost increase can be suppressed.

  According to the invention described in claim 2, at least a part of the outer wall provided with the drain port or at least a part of the outer wall blocking the part of the drain port is formed in a downward slope toward the drain port. Therefore, the water in the electrical junction box can be guided to the drain outlet side by the structure.

It is a side view which shows the state by which the electric junction box concerning one Embodiment of this invention was fixed to the vehicle body. FIG. 2 is a perspective view of the electrical junction box shown in FIG. 1. It is sectional drawing along the AA line in FIG. It is an enlarged view of the B section in FIG. FIG. 3 is a perspective view showing a lower part of the frame shown in FIG. 2 in the drawing. It is an enlarged view of the C section in FIG. It is a perspective view of the cover located in the lower side in FIG. It is a cross-sectional perspective view along the DD line in FIG. It is an enlarged view of the E section in FIG. It is sectional drawing along the FF line in FIG.

  An “electric connection box” according to an embodiment of the present invention will be described with reference to FIGS. The electrical junction box 1 shown in FIGS. 1 to 3 is mounted on an automobile and mainly performs power distribution. As shown in FIG. 1, the electrical junction box 1 is fixed to a fixing part 99 extending in the vertical direction in the vehicle body. An arrow Y in FIG. 1 indicates a vertically downward direction, and an arrow Z and an arrow X orthogonal to the arrow Y indicate a horizontal direction.

  The electrical junction box 1 includes a frame 2, a first cover 3 attached to one side of the frame 2, and a second cover 4 attached to the other side of the frame 2 (corresponding to a “cover” in the claims). And a plurality of components housed in the case 10. A side surface of the case 10 is provided with a wire insertion hole 7 through which a plurality of wires are inserted. The frame 2, the first cover 3, and the second cover 4 are each made of synthetic resin, and are formed by a well-known injection molding.

  The frame 2 includes a cylindrical peripheral wall 21, a component mounting portion 24 provided on the inner side of the peripheral wall 21, a reinforcing portion 6 provided on the outer side of the peripheral wall 21, and an outer surface of the peripheral wall 21. And brackets 22 and 23 which are superposed on 99 and bolted.

  A pair of convex portions 27 are provided at the end of one side of the peripheral wall 21 and the side to which the first cover 3 is attached, and a latch receiver is provided at the end opposite to the peripheral wall 21 and the side to which the first cover 3 is attached. One section 28 is provided. As shown in FIGS. 5 and 10, a plurality of locking receiving portions 25 and a plurality of slits 26 are provided at the end of the peripheral wall 21 on the side where the second cover 4 is attached. The convex portion 27, the latch receiving portion 28, the latch receiving portion 25, and the slit 26 will be described later.

  A plurality of electronic components 11, 12, 13 such as relays, fuses and fusible links are mounted on one side of the component mounting portion 24, and a plurality of electric wires and bus bars are inserted on the other side of the component mounting portion 24 ( In FIGS. 1-10, illustration of an electric wire and a bus bar is abbreviate | omitted.)

  The reinforcing portion 6 includes a reinforcing wall 61 disposed on the outer side of the peripheral wall 21 with a space from the peripheral wall 21, and a plurality of reinforcing ribs 62 that connect the reinforcing wall 61 and the peripheral wall 21. The reinforcing portions 6 are provided at a plurality of locations on the frame 2.

  The first cover 3 is formed in a box shape having a plate portion 30 and a peripheral wall 31 erected from the outer edge of the plate portion 30. A pair of hooks 37 are provided at one end of the peripheral wall 31 and at the end of the frame 2, and one locking portion 38 is provided at the end opposite to the peripheral wall 31 and at the end of the frame 2.

  As shown in FIGS. 3 and 8, the first cover 3 is attached to the frame 2 and covers the side on which the electronic components 11, 12, and 13 of the component mounting portion 24 are mounted, and the end of the peripheral wall 31. Overlaps the end of the peripheral wall 21 of the frame 2. Further, the pair of hooks 37 are hooked on the pair of convex portions 27 provided on the peripheral wall 21, and the locking portions 38 are locked on the locking receiving portions 28 provided on the peripheral wall 21.

  As shown in FIG. 7, the second cover 4 is formed in a box shape having a plate portion 40 and a peripheral wall 41 erected from the outer edge of the plate portion 40. A plurality of locking portions 45 and a plurality of T-shaped ribs 46 are provided at the end of the peripheral wall 41 on the frame 2 side. The T-shaped rib 46 is composed of a plate piece 46a that extends in a cantilevered manner from the outer surface of the peripheral wall 41 to the frame 2 side, and a rib 46b that protrudes from the inner surface (surface on the peripheral wall 41 side) of the plate piece 46a. Yes.

  As shown in FIGS. 3 and 8, the second cover 4 is attached to the frame 2, covers the side of the component mounting portion 24 where the electric wires and bus bars (not shown) are inserted, and ends the peripheral wall 41. Overlaps the end of the peripheral wall 21 of the frame 2. Further, the end portion of the peripheral wall 41 is positioned inward of the end portion of the peripheral wall 21. Further, as shown in FIGS. 9 and 10, the plurality of locking portions 45 are locked to the plurality of locking receiving portions 25 provided on the peripheral wall 21, and the ribs 46 b of the plurality of T-shaped ribs 46 are connected to the peripheral wall 21. It is positioned in each slit 26 provided.

  The operation of the T-shaped rib 46 will be described in more detail. In the state where the second cover 4 is attached to the frame 2, the T-shaped rib 46 has the plate piece 46 a along the outer surface of the peripheral wall 21 and the rib 46 b positioned in the slit 26. As a result, rattling between the frame 2 and the second cover 4 in the arrow Y direction and the arrow Z direction is suppressed, and the rigidity of the case 10 is reinforced.

  Since the tip of the T-shaped rib 46 is positioned closer to the plate portion 40 than the tip of the locking portion 45, the locking portion 45 is locked when the second cover 4 is attached to the frame 2. By positioning with respect to the portion 25, each rib 46 b is positioned with respect to each corresponding slit 26. For this reason, the operator can attach the 2nd cover 4 to the flame | frame 2 without being aware of position alignment with each rib 46b and each slit 26. FIG.

  Further, since the locking portion 45 is structured to be locked to the locking receiving portion 25 while bending the locking receiving portion 25, when attaching the second cover 4 to the frame 2, the operator It is necessary to press the second cover 4 to the frame 2 side with a certain amount of force in order to lock the 45 to the lock receiving portion 25, but the T-shaped rib 46 may press any part of the frame 2. Since the structure is not deformed, even if the T-shaped rib 46 is provided, the pressing force when the second cover 4 is attached does not increase, and the burden on the operator is small.

  Such an electrical junction box 1 is fixed to the fixing portion 99 by bolting the brackets 22 and 23 to the fixing portion 99 in such a direction that the plate portion 40 of the second cover 4 faces the fixing portion 99. The In addition, the electrical connection box 1 has a drainage structure that drains rainwater that has entered the case 10 through the plurality of wires inserted through the wire insertion hole 7 or water generated in the case 10 due to condensation to the outside of the case 10. Have. Hereinafter, this drainage structure will be described.

  “The end of the peripheral wall 21 (corresponding to the frame-side outer wall of the claims)” and “the peripheral wall 41 (the cover-side outer wall of the claims) that are overlapped with each other on the bottom surface of the case 10 fixed to the fixing portion 99. A drain outlet 5 is provided at the “end portion of the peripheral wall 21” located on the outer side of the “end portion”. Moreover, the drain port 5 is provided in two places of the peripheral wall 21 edge part, as shown in FIG.

  As shown in FIGS. 3 to 6, the drain port 5 is formed to be concave from the overlapping surface 21 a with the end portion of the peripheral wall 41, and is an end surface 21 b (the end surface on the second cover 4 side) of the peripheral wall 21 end portion. ) And the overlapping surface 21a. Further, the drain port 5 extends to a portion where the end opposite to the end surface 21 b does not overlap the end of the peripheral wall 41. Further, the peripheral wall 41 is formed such that a portion 41 a located on the bottom surface of the case 10 in a state of being fixed to the fixing portion 99 is inclined downward toward the drain port 5.

  In the electrical junction box 1 having such a drainage structure, the water in the case 10 is discharged out of the case 10 through the drainage port 5 on the bottom surface of the case 10 as indicated by an arrow in FIG. On the bottom surface of the case 10, water is guided to the drain outlet 5 side by the portion 41 a of the peripheral wall 41 described above.

  The drainage port 5 is not opened in the vertical direction, but is opened in two directions: “the end surface 21b direction of the end portion of the peripheral wall 21 (that is, the horizontal direction)” and “the overlapping surface 21a direction (that is, the upper direction)”, and In the opening in the direction of the overlapping surface 21 a, the end surface 21 b side is closed by the end of the peripheral wall 41, so that the water that bounces off the vehicle body or the like hardly enters the case 10 from the drain port 5.

  Further, since the drainage port 5 is not a through-hole penetrating the peripheral wall 21, the frame 2 can be molded by a simple molding die, and an increase in cost can be suppressed. That is, in order to form a through hole in the peripheral wall 21, in addition to a pair of molding dies that are in contact with and away from the depth direction of the frame 2 (arrow X), in a direction that is orthogonal to the contact and separation direction (arrow Y) Although it is necessary to use a slide mold that slides, it is not necessary to use a slide mold because the drain port 5 is not a through hole.

  Further, in the electrical junction box 1, the bottom of the case 10 fixed to the fixing portion 99 is positioned outside the “end portion of the peripheral wall 21” and “end portion of the peripheral wall 31” overlapped with each other. The drain port 5 may be provided at the “end of the peripheral wall 31”.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

1 Electrical junction box 2 Frame 4 Second cover (cover)
5 Drain port 21 Perimeter wall (outer wall on the frame side)
21a Overlapping surface 21b End surface 41 Peripheral wall (Cover side outer wall)

Claims (2)

A frame on which an electronic component is mounted; and a cover attached to the frame;
In the electric junction box in which the end of the frame side outer wall and the end of the cover side outer wall are overlapped,
One of the end portion of the frame-side outer wall and the end portion of the cover-side outer wall, which is located outward, is recessed from the overlapping surface with the other and opens in two directions of the one end surface and the overlapping surface. A drain port is provided, and the drain port extends to a position where the side opposite to the end surface does not overlap the other side;
An electrical junction box, wherein the drain port is provided on a bottom surface in a state of being fixed to a vehicle body. The at least part of the outer wall provided with the drain port or at least a part of the outer wall blocking the part of the drain port is formed in a downward slope toward the drain port. The electrical junction box described.

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