JP6318085B2 - Drainage structure of electrical junction box - Google Patents

Description

  The present invention relates to a drainage structure for an electrical junction box in which a separate attachment body such as a control device is assembled to the electrical junction box main body and is connected by a connector.

  In an electrical junction box mounted on an automobile or the like, for example, a wiring board on which electronic components are mounted, an insulating board on which bus bars are mounted, and the like are accommodated. As one type, for example, as described in Japanese Patent Application Laid-Open No. 2008-172889 (Patent Document 1), an electronic control unit such as an ECU containing a control circuit is used as a separate mounting body, and this mounting body is electrically connected. The thing which was made detachable with respect to the box main body is known. According to such an electrical junction box, there is an advantage that the electronic control unit can be easily replaced or changed by making the electronic control unit a separate structure.

  By the way, in the electrical junction box composed of the assembly structure of the electrical junction box main body and the mounting body, the mounting surface of the electrical junction box main body and the overlapping surface of the mounting body superimposed on the mounting surface are in corresponding positions. Each connector is provided. Specifically, an opening is provided through the mounting surface of the electrical junction box body, and a part of the main body side connector protruding from the internal circuit board is projected to the outside through the opening. A mounting body side connector projects from the overlapping surface of the mounting body. When the mounting body is assembled to the electrical connection box body, the electrical circuit provided in the electrical connection box body and the electrical circuit provided in the mounting body are electrically connected to each other by connecting the body side connector and the mounting body side connector. Connected.

  However, in such an electrical junction box having a conventional structure, an opening is provided in the mounting surface of the electrical junction box body. Therefore, when the electrical junction box is submerged, water is introduced into the connector through the opening. There is a possibility of intrusion. On the other hand, the opening part of the electrical junction box main body is sometimes covered from the outside by an assembled body, and there is no specific drainage structure for water immersion from the opening part. Therefore, when the water that reaches the opening of the electrical junction box body through the gap between the opposing surfaces of the electrical junction box body and the mounting body enters the interior from the opening, the terminal of the connector on the body side is covered with water. There was a risk of problems such as short circuits.

JP 2008-172889 A

  The present invention has been made in the background as described above, and the problem to be solved is that even if water enters the inside from the opening of the electric connection box main body, the terminal of the main body side connector gets wet. It is an object of the present invention to provide a novel drainage structure for an electrical junction box that can prevent the occurrence of the problem.

A first aspect of the present invention comprises an electrical junction box present having a mounting surface to be assembled mounting member separate are superimposed, an opening is formed through the mounting surface of the electrical junction box body, before A body-side connector protruding from the circuit board of the electrical connection box body protrudes to the outside through the opening , and the attachment body is overlapped and assembled to the electrical connection box body to assemble the body-side connector and the a drainage structure of the connector is connected to Ru electrical connection box of the mounting side, the electrical junction box body, so the body-side connector is mounted on the vehicle so as to protrude horizontally from the opening and that one, the body-side connector includes a terminal connected to said circuit board, comprising a housing the terminal is accommodated positioned, the upper wall of said housing, said rotating from the projecting end portion of the main body side connector The pre SL terminal over the substrate together are covering from above, the upper surface of the top wall is characterized in that it comprises a lower inclined surface inclined downward toward the at least one side edge.

  According to this aspect, the upper wall of the housing of the main body side connector that protrudes horizontally from the opening when the electric junction box main body is mounted on the vehicle extends from the protruding end portion of the main body side connector to the circuit board. The terminal is covered from above. Thereby, even if water permeates from the opening of the electrical junction box body, the upper wall of the housing becomes a ridge and can prevent the terminal from being wetted. Moreover, since the upper surface of the upper wall is constituted by a lower inclined surface that is inclined downward toward at least one side edge, even if water enters the upper wall of the housing, the upper wall is promptly guided to the side edge. And drained downward.

A drain hole may be provided in the lower wall of the housing . As a result , even if water enters the inside of the housing, the water is quickly drained to the outside from the lower drainage hole according to the gravity, and the water is prevented from being accumulated in the housing and causing problems such as a short circuit. Has been.

  According to a second aspect of the present invention, in the first aspect, the downward inclined surface is directed from the center portion in the width direction of the upper surface of the upper wall of the housing toward the side edge portions on both sides in the width direction. And a pair of downwardly inclined surfaces inclined downward.

  According to this aspect, since the upper surface of the upper wall of the housing is configured by the pair of lower inclined surfaces that are inclined downward from the center toward both side edges, water can be applied to any part of the upper wall of the housing. Even if it flows down, it can be quickly led down and drained. In addition, since the separation distance between the highest part and the lowest part on the upper surface of the upper wall can be kept small, it is possible to maintain the weight balance of the entire upper wall and prevent problems such as resin sink marks during molding. can do.

  According to a third aspect of the present invention, in the one described in the first or second aspect, the lower wall of the housing is configured such that a plurality of the terminals are arranged in alignment in the width direction of the opening. The drainage hole penetrating through the terminal extends over the entire length of the terminal in the alignment direction and extends beyond the terminals located at both ends of the alignment direction, and is open to the circuit board side. It is what.

  According to this aspect, since the lower wall of the housing located below the plurality of terminals is completely eliminated at least at the base end side and the drainage hole is formed, water is temporarily provided inside the main body side connector. Even when it enters, it is possible to prevent the water that has reached the lower wall from coming into contact with the terminal, and to promote reliable drainage and prevention of short circuit.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, both side edges of the upper wall of the housing are connected to a base end portion of the upper wall. A housing fixing portion that extends in a length that does not reach the projecting end portion is provided so as to project upward on both side edge portions of the projecting end portion of the upper wall of the housing. A protruding wall is provided, and a protruding side edge portion of the upper wall located between the protruding wall and the housing fixing portion protrudes outward from the mounting surface of the electric junction box body. is there.

  According to this aspect, the water collected at the side edge due to the downward inclination of the upper wall of the housing is stopped by the housing fixing portion. On the other hand, the protruding end of the upper wall is provided with a protruding wall on the side edge side where water is collected, and water is prevented from entering the housing from the protruding end surface of the upper wall. As a result, the water adhering to the upper wall is guided to the protruding side edge of the upper wall located between the protruding wall and the housing fixing portion, and the water guided to the protruding side edge is It drains to the outside of the mounting surface. This can prevent water from entering the housing and the inside of the electrical junction box body more advantageously.

  According to the present invention, the upper wall of the housing of the main body side connector protruding in the horizontal direction from the opening extends from the protruding end portion of the main body side connector to the circuit board, and the terminals are covered from above. Thereby, even if water permeates from the opening, the upper wall of the housing becomes a wrinkle and the terminal can be prevented from getting wet. And since the upper surface of the upper wall is comprised by the downward inclined surface, even if water infiltrates into the upper wall of a housing, it will be guide | induced to a side edge part quickly and will be drained below. Furthermore, since the drain hole is formed through the lower wall of the housing, even if water enters the inside of the housing, the water is quickly drained from the lower drain hole to the outside according to gravity, and the water is stored inside the housing. Therefore, it is possible to prevent problems such as short circuits from occurring.

The perspective view which shows the assembly middle state of the electrical junction box which has the drainage structure of the electrical junction box as one Embodiment of this invention. The perspective view of the electrical-connection box main body shown in FIG. FIG. 3 is an exploded perspective view of the electric junction box body shown in FIG. 2. The perspective view of the main body side connector shown in FIG. The top view of the main body side connector protrudingly provided by the circuit board shown in FIG. FIG. 4 is a bottom view of a main body-side connector protruding from the circuit board shown in FIG. 3.

  Embodiments of the present invention will be described below with reference to the drawings.

  The electrical junction box 10 provided with the drainage structure of the electrical junction box according to one Embodiment of this invention is shown by FIGS. As shown in FIG. 1, the electrical junction box 10 includes an electrical junction box main body 12 and a separate mounting body 18 that is assembled by being superimposed on the mounting surface 16 of the electrical junction box main body 12 having the opening 14. I have. As shown in FIG. 3, the electrical junction box main body 12 is formed by an upper case 20 and a lower case 22, and a circuit board 24 is accommodated therein. In the following description, “upper” means the upper side in FIG. 1, and “lower” means the upper side in FIG.

  The upper case 20 is an integrally molded product formed of a synthetic resin, and has a substantially vertically long box shape that opens downward. As shown in FIGS. 2 to 3, a mounting surface 16 is formed on the upper surface of the upper case 20, and at one end side in the longitudinal direction of the mounting surface 16 (upper right side in FIGS. 2 to 3). A substantially horizontally long rectangular opening 14 extending along one end side is provided. On the other hand, in the mounting surface 16, both end portions in the width direction on one end side (upper right side in FIG. 2) where the opening 14 is provided and the other end side (lower left side in FIG. 2) opposite in the longitudinal direction. Is provided with a pair of support portions 26, 26. In addition, an engagement protrusion 30 (see FIG. 3) having a substantially triangular cross-section projecting outward is provided at the center of the side wall 28 on one end side of the mounting surface 16.

  The lower case 22 is an integrally molded product formed from a synthetic resin. As shown in FIGS. 2 to 3, the lower case 22 has substantially the same shape as the upper case 20 in a plan view, and has a substantially box shape that opens upward.

  The circuit board 24 has a plate shape having a vertically long rectangular shape substantially the same as the lower case 22 in plan view. Various electrical components such as a relay 32 and a resistor 34 are appropriately provided in the central portion of the circuit board 24 (see FIG. 3). On the other hand, on the one end side in the longitudinal direction of the circuit board 24 (in the diagonally upper right side in FIG. 3), a substantially horizontally long main body side connector 36 protruding upward is disposed along one end side. As shown in FIG. 3, the main body side connector 36 is connected to the circuit board 24 and electrically connected to the mounting body 18, and is formed in a substantially rectangular tube shape and accommodates the terminal 38. A synthetic resin housing 40 to be disposed is included. As shown in FIG. 2, the terminals 38 are arranged so as to be spread and aligned in the width direction of the openings 14.

  The main body side connector 36 is fixed to the circuit board 24 at both ends in the width direction. That is, as shown in FIG. 4 (FIG. 3), the main body side connector 36 extends at a length not extending from the base end portion 44 to the protruding end portion 46 at both side edges of the upper wall 42 of the housing 40. It is fixed by screwing a bolt (not shown) from the lower surface side of the circuit board 24 into the bolt hole 50 of the housing fixing portion 48 to be taken out. Furthermore, at the protruding end portion 46 of the upper wall 42 of the housing 40, a flat protruding wall 52 that protrudes upward is provided on both side edges in the longitudinal direction.

  In addition, in the main body side connector 36, as shown in FIG. 4, the upper surface 54 of the upper wall 42 of the housing 40 is directed from the central portion in the width direction toward the side edges on both sides in the width direction (in FIG. The direction indicated by the arrow) includes a pair of downward inclined surfaces 56 and 56 that are inclined downward. Further, as shown in FIG. 5, the upper wall 42 of the housing 40 is formed so as to extend from the protruding end portion 46 of the main body side connector 36 to the circuit board 24. Thereby, the terminal 38 erected on the circuit board 24 is covered with the upper wall 42 of the housing 40 from above. On the other hand, the lower wall 58 of the housing 40 is provided with a substantially rectangular drain hole 60 as viewed from the bottom opening toward the circuit board 24, as shown in FIG. The drain hole 60 is provided over the entire length of the terminal 38 in the alignment direction (left and right direction in FIG. 6), and extends to the range beyond the terminals 38 located at both ends of the alignment direction. Yes.

  Further, a fuse module 62 is provided on the other end side in the longitudinal direction of the circuit board 24 (lower left oblique side in FIG. 2). In the fuse module 62, a plurality of fuse mounting portions 64 are stacked in two stages in the vertical direction and formed in parallel in the longitudinal direction of the fuse module 62.

  Further, as shown in FIG. 2 (FIG. 3), side connection type connectors 66 are disposed on the side edge portions on both sides extending in the longitudinal direction of the circuit board 24. The side connection type connector 66 has a structure in which a plurality of board terminals (not shown) are inserted into a connector housing member 68 that is formed of synthetic resin and opens to the side of the electrical connection box 10. Then, the end portion of the board terminal protruding outward from the connector housing member 68 on the circuit board 24 side is bent in an L shape toward the circuit board 24 and soldered to the circuit board 24. It is connected to a printed wiring (not shown) formed on the circuit board 24.

  The circuit board 24 having such a configuration is accommodated between the upper case 20 and the lower case 22 to constitute the electrical junction box body 12. In this accommodated state, as shown in FIG. 2, the main body side connector 36 provided on the circuit board 24 protrudes to the outside, that is, the mounting surface 16 through the opening 14 opened in the mounting surface 16. Has been. Thereby, the protruding side edge portion 70 (see FIGS. 2 and 4) of the upper wall 42 located between the protruding wall 52 and the housing fixing portion 48 protrudes outward from the mounting surface 16.

  On the other hand, the attachment body 18 is an electronic control unit of a vehicle such as an ECU, and is attached to and electrically connected to the electrical junction box body 12 as shown in FIG. The electronic components such as the relay 32 mounted in the electrical junction box body 12 are controlled. The electrical junction box 10 in the present invention includes a junction block, a fuse box, a relay box, and the like.

  As shown in FIG. 1, the mounting body 18 has a structure in which a circuit board (not shown) is accommodated in a case 72 formed of synthetic resin. The case 72 has a rectangular shape substantially the same as the mounting surface 16 of the electrical junction box body 12 in plan view, and the bottom surface 74 of the case 72 is the mounting surface when the mounting body 18 is attached to the electrical junction box body 12. 16 is an overlapping surface.

  As shown in FIG. 1, the circuit board housed in the case 72 is provided with a mounting body side connector 76 that is connected to the main body side connector 36 provided on the circuit board 24 of the electrical junction box main body 12. Yes. The attachment body side connector 76 extends along one end side in the longitudinal direction of the case 72 (rightward in FIG. 1), and the bottom surface 74 of the case 72 is parallel to the attachment surface 16 of the electrical junction box body 12. In a state of facing the main body side connector 36 (see FIG. 2), the main body side connector 36 is protruded toward the main body side connector 36. That is, the attachment body side connector 76 protrudes from the bottom surface 74 that is the overlapping surface of the attachment body 18. In addition, an engagement frame body 80 that is connected to the upper end portion of the side wall 78 in a cantilever manner is projected downward from the side wall 78 on one end side in the longitudinal direction of the case 72. On the other hand, a pair of rotating portions 82 and 82 project outwardly from both ends on the other end side (left side in FIG. 1) opposite to one end side of the case 72.

  Assembling the electrical junction box main body 12 and the mounting body 18 having the above-described structure is as follows. First, the bottom surface 74 of the mounting body 18 faces the mounting surface 16 of the electrical junction box main body 12 as shown in FIG. In this orientation, the pair of rotating portions 82 and 82 are inserted into the pair of support portions 26 and 26 of the electrical junction box body 12. As a result, a pair of rotating portions 82 and 82 provided on the other end side of the attachment body 18 and a pair of support portions 26 and 26 provided on the other end side of the attachment surface 16 constitute a hinge mechanism. That is, the mounting surface 16 and the other end side of the mounting body 18 are rotatably assembled via a detachable hinge mechanism. Then, by rotating the mounting body 18 with the pair of rotating portions 82 and 82 as the center of rotation, the mounting body 18 is superimposed on the mounting surface 16 of the electrical junction box body 12 and assembled.

  As a result, the engagement frame body 80 provided on one end side of the attachment body 18 engages with the engagement protrusion 30 (see FIG. 3) provided on the one end side of the electrical junction box body 12, thereby The body 18 is fixed to the electrical junction box body 12 and the assembly is completed. In this assembled state, the attachment body side connector 76 provided on the attachment body 18 is inserted into the main body side connector 36 protruding from the attachment surface 16, and the terminal 38 disposed in the main body side connector 36 is provided. It is connected to a female terminal (not shown) disposed in the attachment body side connector 76. Thereby, the circuit board 24 of the electrical junction box main body 12 and the circuit board of the attachment body 18 are electrically connected. Further, a connector (not shown) is connected to the side connection type connector 66 provided in the electrical junction box body 12. In the electrical junction box 10 having such a structure, the electrical junction box main body 12 is mounted on the vehicle such that the main body side connector 36 projects from the opening 14 in the horizontal direction.

  According to such a drainage structure of the electrical junction box 10 according to the present embodiment, the upper wall 42 of the housing 40 is formed to extend from the protruding end 46 of the main body side connector 36 to the circuit board 24. Thereby, when the electrical connection box 10 is mounted on the vehicle, the terminal 38 erected on the circuit board 24 is covered with the upper wall 42 of the housing 40 from above. Therefore, even if water enters from the opening 14, it is possible to prevent the terminal 38 from being wetted by the upper wall 42 of the housing 40 becoming a trap. Moreover, the upper surface 54 of the upper wall 42 of the housing 40 is composed of a pair of downward inclined surfaces 56, 56 that are inclined downward from the central portion in the width direction toward the side edges on both sides in the width direction. Therefore, even if any part of the upper surface 54 is flooded, it can be quickly guided downward and drained.

  Further, the lower wall 58 of the housing 40 is cut out over the entire region where the terminals 38 are erected on the circuit board 24 side, so that a drain hole 60 is provided therethrough. That is, when the electrical junction box 10 is mounted on the vehicle, the lower wall 58 of the housing 40 located below the terminal 38 is completely eliminated on the circuit board 24 side, and the drain hole 60 is formed. Therefore, even if water enters the inside of the main body side connector 36, it is possible to prevent water from collecting in the lower wall 58 and coming into contact with the terminal 38, so that reliable drainage and short circuit prevention can be prevented. Can be encouraged.

  In addition, the housing fixing portions 48 are provided on both side edges of the upper wall 42 of the housing 40, and the protruding walls 52 are provided on both side edges of the protruding end 46 of the upper wall 42 of the housing 40. Thus, even if water enters from the opening 14 and reaches the upper wall 42 of the housing 40, the water is collected on both side edges by the downward inclined surface 56, and then between the protruding wall 52 and the housing fixing portion 48. It is drained to the outside from the protruding side edge portion 70 that is located at and protrudes outward from the mounting surface 16. Therefore, it is possible to prevent water from entering the housing 40 and the electrical junction box body 12 from the opening 14 more advantageously.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited at all by the specific description in this embodiment. For example, any other known configuration can be adopted as the configuration of the electrical junction box main body 12 and the attachment body 18 of the above embodiment. Moreover, in the said embodiment, although the upper surface 54 of the upper wall 42 of the housing 40 was comprised from a pair of downward inclined surface 56,56, it is one downward inclined surface which inclines below toward one side edge part. It may be constituted by.

  Furthermore, in the above-described embodiment, the drainage hole 60 is formed by cutting the lower wall 58 of the housing 40 on the circuit board 24 side. However, the protruding end portion side of the lower wall 58 of the housing 40 is further cut away. A drainage hole may be formed. Moreover, in the said embodiment, although it provided over the full length of the alignment direction of the terminal 38 in the lower wall 58 of the housing 40, you may make it provide only in the both ends side of the alignment direction where water collects.

10: electrical junction box, 12: electrical junction box body, 14: opening, 16: mounting surface, 18: mounting body, 24: circuit board, 36: body side connector, 38: terminal, 40: housing, 42: top Wall: 44: Base end portion, 46: Projection end portion, 48: Housing fixing portion, 52: Projection wall, 54: Upper surface, 56: Downward inclined surface, 58: Lower wall, 60: Drainage hole, 70: Projection side edge Part, 74: bottom surface (overlapping surface), 76: attachment side connector

Claims (7)

With an electrical connection box this body having a mounting surface mount separate are assembled superimposed,
Formed through the opening in the mounting surface of the electrical junction box body, the main body side connector projecting from the circuit board before Symbol electrical junction box body is projected to the outside through the opening,
Wherein a drainage structure of the body-side connector and the mounting side of the connector connected to Ru electrical connection box by assembling superimposed said mounting member to said electrical junction box body,
The electrical junction box body is mounted on a vehicle such that the body-side connector protrudes horizontally from the opening,
The body-side connector has a terminal connected to said circuit board, a housing the terminal is accommodated arranged,
Lower the upper wall of said housing, said with the projecting end portion of the main body side connector is covering the front Symbol terminals over the circuit board from above, the upper surface of the upper wall towards at least one side edge A drainage structure for an electrical junction box, characterized by including a downwardly inclined surface inclined toward the surface.   2. The lower inclined surface includes a pair of lower inclined surfaces that respectively incline downward from a central portion in the width direction of the upper surface of the upper wall of the housing toward the side edge portions on both sides in the width direction. The drainage structure of the electrical junction box described. 3. The drainage structure for an electrical junction box according to claim 1, wherein the lower inclined surface is inclined to reach the side edge portion of the upper surface of the upper wall. The drainage structure for an electrical junction box according to any one of claims 1 to 3, wherein a drainage hole is provided in a lower wall of the housing. A plurality of the terminals are arranged in a row extending in the width direction of the opening, while the drainage holes penetrating the lower wall of the housing extend over the entire length of the terminals in the alignment direction. The drainage structure for an electrical junction box according to claim 4 , wherein the drainage structure extends in a range beyond the terminals located at both ends of the direction and is opened to the circuit board side. On both side edge portions of the upper wall of the housing, a housing fixing portion that protrudes from the base end portion of the upper wall to a length that does not reach the protruding end portion is projected. Projecting walls projecting upward are provided on both side edge portions of the projecting end portion of the upper wall, and the projecting side of the upper wall located between the projecting wall and the housing fixing portion. The drainage structure for an electrical junction box according to any one of claims 1 to 5 , wherein an edge protrudes outward from the mounting surface of the electrical junction box main body. An electrical junction box main body and a separate mounting body that is assembled by being superimposed on the mounting surface of the electrical junction box main body,
An opening is formed through the mounting surface of the electrical connection box body, and a body-side connector protruding from the circuit board of the electrical connection box body projects outside through the opening, while the mounting body overlaps. The attachment side connector protrudes from the mating surface.
The electrical connection box drainage structure is configured such that the main body side connector and the mounting body side connector are connected by superimposing and assembling the attachment body on the electric connection box main body,
The electrical junction box body is mounted on a vehicle such that the body-side connector protrudes horizontally from the opening,
The main body side connector is configured to include a terminal connected to the circuit board and a housing in which the terminal is accommodated.
The upper wall of the housing extends from the projecting end of the main body side connector to the circuit board to cover the terminal from above, and the upper surface of the upper wall faces at least one side edge. It consists of a downward inclined surface that inclines downward,
A drainage hole is provided in the lower wall of the housing.
A drainage structure for an electrical junction box.

Images