JP2010220366A - Electrical junction box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vertically attached type electrical junction box having a new structure capable of efficiently preventing an electrical junction box body from being wet with water coming from a vehicle panel. <P>SOLUTION: The electrical junction box has a structure in which a fixing part 46 to the vehicle panel 14 is provided on one end of an attaching leg 16 constituted differently from the electrical junction box body 12, detachable engagement parts 34, 66 are provided between the lower surface of the other end of the attaching leg 16 and the upper end of the electrical junction box body 12, and a drainage groove 44 extending from the other end side toward the one end side and opening on the vehicle panel 14 side is formed on the upper surface of the attaching leg 16. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electrical junction box mounted on an automobile or the like, and more particularly, to an electrical junction box having a moisture prevention structure in an electrical junction box body.

  An electric junction box is generally provided on an electric circuit in an automobile or the like. This electrical junction box incorporates a wiring board, a control board, and the like, and is mounted in an appropriate place such as a vehicle compartment or an engine room.

  By the way, the intrusion of water into the electrical junction box causes great damage to the electrical circuit. Therefore, the mounting location is set so that the electrical junction box is not wetted, but it is extremely difficult to completely avoid the wetted water.

  For such a problem, Patent Document 1 (Japanese Patent Laid-Open No. 2000-13957) proposes a waterproof structure in which a large-sized prevention cover that covers the entire upper portion of the electrical junction box is attached to the electrical junction box. ing.

  However, when a large waterproof cover is attached to the electrical junction box, problems such as an increase in the number of parts and associated manufacturing costs and an increase in the assembly work process cannot be avoided. In addition, since the installation space for the electrical junction box requires a larger installation space due to the installation of the waterproof cover, it is difficult to adopt in reality.

  Moreover, even if the upper part of the electrical junction box is covered with the waterproof cover, it is difficult to avoid rain water or the like from reaching the electrical junction box through the vehicle body panel. That is, even if it is possible to prevent the water from directly falling on the electrical junction box with the waterproof cover, the rainwater etc. that has traveled through the vehicle body panel is not attached to the bracket or the like as long as the electrical junction box is fixedly supported by the vehicle body panel. It is difficult to avoid reaching the electric junction box through the fixed support portion.

  There is also a vertical mounting type electric connection box in which an electric connection box body is mounted facing a vertical wall portion of a vehicle panel such as a partition panel or a side panel positioned at the foot of the front seat of the passenger compartment. In this vertical mounting type electric junction box, since it is attached to the vehicle panel with a bracket projecting from the electrical junction box main body, as described in Patent Document 1, brackets are provided projecting around the body case and the waterproof cover, respectively. It is difficult to adopt the two in terms of structure.

JP 2000-13957 A

  The present invention has been made in the background as described above, and the place to solve the problem can effectively prevent the electrical connection box body from being wetted by water that travels along the vehicle panel. The object is to provide a vertically mounted electrical junction box having a novel structure.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible.

  The present invention provides a vertical mounting type electrical connection in which an electrical junction box body is disposed opposite to a vertical wall portion of a vehicle panel and is attached to the vehicle panel by a plurality of mounting legs protruding from the electrical junction box body. In the box, at least one of the mounting legs is a separate structure from the electrical junction box main body, and a fixing portion to the vehicle panel is provided at one end of the mounting leg, and the other end of the mounting leg is provided. A detachable engaging portion is provided between the lower surface and the upper end of the electric junction box body, and the upper surface of the mounting leg portion extends from the other end side toward the one end side and extends toward the vehicle panel side. It is characterized in that an open drainage groove is formed.

  In the electrical junction box of the present invention, the drainage groove formed on the upper surface of the mounting leg portion extends from the other end side of the mounting leg portion toward the one end side and opens to the vehicle panel side. For this reason, the water transmitted from the vehicle panel to the mounting leg can be caused to flow to the vehicle panel side by the drainage groove. Thereby, it becomes possible to prevent the electrical junction box main body from being wetted by water transmitted from the vehicle panel to the mounting leg.

  In addition, a contact plate that is superimposed on a vertical wall portion of the vehicle panel is provided at a fixing portion of the mounting leg to the vehicle panel so as to fix the contact plate to the vehicle panel, and at the upper end surface of the contact plate, the vehicle panel The aspect which formed the water stop protrusion which is spaced apart from and extended in parallel with a vehicle panel is employ | adopted suitably. Therefore, the water stop projection formed on the upper end surface of the contact plate can prevent water from being transmitted from the vehicle panel to the mounting leg.

  Furthermore, the drainage groove is formed in the center portion in the width direction of the upper surface of the mounting leg portion, and the upper surface of the mounting leg portion is provided with an inclination inclined downward from both sides in the width direction toward the drainage groove. Are preferably employed. Thereby, the induction | guidance | derivation to the drainage groove of the water transmitted to the attachment leg part can be performed efficiently.

  Furthermore, the aspect in which the water stop wall is formed in the edge part by the side of the electrical junction box main body in a drain groove is employ | adopted suitably. Thereby, the transmission of the water collected in the drainage groove to the electric junction box body can be avoided.

  Moreover, the aspect by which the inclination inclined downward toward the vehicle panel side from the electric junction box main body side is attached | subjected to the bottom face of a drainage groove | channel is employ | adopted suitably. Thereby, drainage of the water collected in the drainage groove to the vehicle panel side can be performed efficiently.

  Furthermore, a widened portion is formed at the other end of the mounting leg portion so as to cover the entire upper end surface of the electric junction box main body, and the engagement leg portion is interposed between the lower surface of the widened portion and the upper end of the electric junction box main body. A mode in which the joint portion is formed is preferably employed. Thereby, the water | moisture content of the electrical-connection box main body by the water which transmitted to the attachment leg part can be avoided effectively.

  Furthermore, the aspect in which the mounting leg portion has a widened shape in which the width dimension gradually increases from the one end side fixed to the vehicle panel toward the other end side attached to the electric junction box body, Preferably employed. That is, since the mounting leg portion is widened and the flow path area is increased, even if water flows to the electric junction box body side through the upper surface of the attachment leg portion, the water reaches the electric junction box body. Be disturbed.

  Moreover, you may employ | adopt the aspect in which the attachment leg part has a connection board part extended in a horizontal direction between the opposing surfaces of a vehicle panel and an electrical-connection box main body. Thereby, the electrical junction box body can be separated from the vehicle panel. As a result, even when water flows along the upper surface of the mounting leg portion toward the electrical junction box body, it is possible to prevent water from reaching the electrical junction box body.

The top view which shows the electrical junction box as one Embodiment of this invention. The upper side view of the same electrical junction box. Sectional drawing which expands and shows the principal part of the III-III direction in FIG. It is sectional drawing which expands and shows the principal part of the IV-IV direction in FIG. 2, Comprising: Sectional drawing which shows the attachment state to the vehicle panel of an electrical-connection box. It is a bottom view of the electrical junction box main body which comprises the electrical junction box, Comprising: The bottom view which expands and shows an engagement lock part. The top view of the bracket which comprises the same electrical junction box. The front view of the bracket. VIII-VIII sectional drawing in FIG.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 4 show an electrical junction box 10 as an embodiment of the present invention. The electrical connection box 10 is configured by two brackets 16 and 18 as two mounting legs provided on the electrical connection box body 12 in a state where the electrical connection box body 12 is opposed to the vertical wall portion of the vehicle panel 14. This is a vertical mounting type attached to the panel 14. In the following description, the up and down direction means the up and down direction in FIG. 1 as a general vertical direction.

  More specifically, as shown in FIG. 5, the electrical junction box main body 12 includes a hollow case, and a wiring board and the like are accommodated in the case. In the case, a rectangular inner case 20 and a rectangular outer case 26 having a peripheral wall 24 that is slightly larger than the peripheral wall 22 of the inner case 20 are overlapped with each other on each opening side, and the peripheral wall 24 of the outer case 26 is overlapped. It is assembled in a state in which the peripheral wall 22 of the inner case 20 is fitted therein. In addition, the connection terminal to the external electrical circuit of the electrical circuit accommodated and formed in the electrical junction box main body 12 is formed in the case as a connector connection part etc.

  In addition, a fitting rib 30 projects from the short side wall surface 28 of the electrical junction box body 12 (outer case 26) at the center in the length direction. In the present embodiment, the fitting rib 30 protruding from the peripheral wall 22 of the inner case 20 is inserted into the notch 32 formed in the peripheral wall 24 of the outer case 26, so that the peripheral wall 24 of the outer case 26 is It protrudes from the outer peripheral surface (the outer peripheral surface of the electrical junction box body 12). Furthermore, on both sides of each short side wall 28 sandwiching the fitting rib 30 in the length direction, an engagement lock portion 34 is provided.

  The engagement lock portion 34 has a block shape that protrudes on the short side wall surface 28 as a whole, and a central groove 36 that extends in the height direction of the short side wall surface 28 is formed on the protruding front end surface. A plate-like elastic locking piece 38 is provided in the central groove 36. The plate-like elastic locking piece 38 is directed from one end in the length direction of the central groove 36 toward the other end (toward the right side in FIG. 3, which is opposite to the bottom surface of the electrical junction box body 12). The elastic piece has an extended cantilever structure.

  Further, the engagement lock portion 34 is formed with case side engagement grooves 42 and 42 in portions constituting both side walls 40 and 40 of the central groove 36. These case-side engagement grooves 42, 42 open to both sides of the engagement lock portion 34 (both sides in the circumferential direction of the short side wall surface 28) and extend in parallel with the central groove 36. The case-side engagement groove 42 is opened at the front end side in the height direction of the short side wall surface 28, which is the insertion side of brackets 16 and 18 described later.

  Brackets 16 and 18 having a separate structure are assembled to the electrical junction box body 12. The electrical junction box body 12 has the vertical direction in FIG. 1 as the vertical vertical direction and the horizontal direction as the horizontal direction with the bottom surface of the inner case 20, which is the bottom surface, facing the vertical wall portion of the vehicle panel 14. In this manner, the vehicle panel 14 is fixedly supported via the brackets 16 and 18. That is, the electrical connection box 10 is a vertically mounted type that is supported by the vehicle panel 14 in an upright state.

  In the present embodiment, the drainage groove 44 is formed in the bracket 16 located on the upper side in the state of being attached to the vertical wall portion of the vehicle panel 14. Hereinafter, the bracket 16 will be described with reference to FIGS.

  In the bracket 16, a panel side fixing portion 46 as a fixing portion to the vehicle panel 14 and a case side fixing portion 48 attached to the electric junction box main body 12 are integrally formed at both ends of the main body portion 50 as a connecting plate portion. ing.

  The panel-side fixing part 46 has a contact plate 54 that is superimposed on the fixing seat part 52 of the vehicle panel 14. A bolt insertion hole 56 is formed in the contact plate 54, and the panel side fixing portion 46 is fixed to the vehicle panel 14 by a fixing bolt inserted through the bolt insertion hole 56 ( (See FIG. 4). On the upper end surface of the contact plate 54, a water stop protrusion 58 is provided that extends along the edge opposite to the contact surface to the fixed seat 52.

  The main body 50 is formed so as to extend substantially perpendicularly from the contact plate 54 of the panel-side fixing portion 46. The main body 50 has a width that is gradually increased toward the distal end in the extending direction.

  In the present embodiment, reinforcing ribs 60, 60 extending along both widthwise edge portions of the main body 50 are formed across the contact plate 54 and the main body 50. Thereby, the strength of the bracket 16 is ensured.

  A case side fixing portion 48 is formed on the extending distal end side of the main body portion 50. The case-side fixing portion 48 extends on both sides of the main body portion 50 in the width direction. In particular, in the present embodiment, the case-side fixing portion 48 has a size that covers the entire short-side wall surface 28 of the electrical junction box main body 12, and the case-side fixing portion 48 constitutes a widened portion.

  Further, a fitting groove 62 is formed on the lower surface side of the case side fixing portion 48 at a position corresponding to the fitting rib 30 of the electrical junction box body 12. The fitting groove 62 has a cross-sectional shape corresponding to the fitting rib 30, and extends straight in the extending direction of the main body portion 50 that is an assembling direction to the electrical connection box main body 12. The fitting groove 62 is open on both sides in the extending direction.

  Furthermore, locking engagement portions 64 are formed on the lower surface side of the case side fixing portion 48 on both sides of the fitting groove 62 in the width direction (left and right direction in FIG. 7). The locking engagement portion 64 has a pair of bracket-side engagement grooves 66 and 66 extending straight in the direction of assembly to the electrical junction box body 12 on both sides in the width direction. These bracket-side engagement grooves 66 and 66 have wall portions 68 and 68 that are located on both sides in the width direction of the lock engagement portion 64 and are directed inward in the width direction of the lock engagement portion 64. Thus, the openings are formed to face each other.

  A locking groove 70 extending between the pair of bracket-side engaging grooves 66 and 66 is formed in the center portion in the width direction of the locking engaging portion 64. A locking projection 72 that protrudes from the bottom surface of the groove is formed at one end of the locking groove 70 (an end on the assembly side to the electrical junction box body 12).

  Furthermore, on the upper surface of the bracket 16, the main body portion 50 extends in a substantially constant cross-sectional shape from the abutting plate 54 of the panel side fixing portion 46 to the extending end of the case side fixing portion 48. A central protrusion 74 that extends straight in the direction is provided. A drainage groove 44 is formed so as to extend along the central protrusion 74 on both sides in the width direction across the central protrusion 74.

  A water blocking wall 76 is provided at the end of the case side fixing portion 48 in the drainage groove 44. On the other hand, the end of the panel side fixing portion 46 in the drainage groove 44 penetrates the contact plate 54 in the thickness direction. The opening end surface of the drainage groove 44 in the contact plate 54 is located on the water blocking wall 76 side of the contact surface of the contact plate 54 with respect to the fixed seat portion 52, thereby being separated from the vehicle panel 14. Further, the bottom surface of the drainage groove 44 is an inclined surface that gently falls from the case side fixing portion 48 toward the panel side fixing portion 46. Furthermore, the upper surface of the bracket 16 is an inclined surface that descends toward the drainage groove 44 on each of both sides in the width direction across the central protrusion 74.

  The bracket 16 is assembled to the electric junction box body 12 so that the fitting rib 30 of the electric junction box body 12 and the fitting groove 62 of the bracket 16 are fitted, and the engagement lock of the electric junction box body 12 is engaged. The portion 34 and the locking engagement portion 64 of the bracket 16 are fitted.

  The bracket 16 is assembled to the electrical junction box body 12 by sliding the bracket 16 with respect to the electrical junction box body 12 from the bottom surface side in the height direction of the electrical junction box body 12 so that the fitting rib 30 is connected to the electrical junction box body 12. By inserting into the fitting groove 62 from the bottom surface side of the main body 12, the fitting rib 30 is fitted into the fitting groove 62, and the engagement lock portion 34 is inserted into the locking groove 70 of the locking engagement portion 64. Then, the engagement lock portion 34 is fitted into the locking groove 70 of the lock engagement portion 64.

  In the state where the bracket 16 is assembled to the electrical junction box body 12 as described above, the fitting rib 30 is located at the end of the fitting groove 62 opposite to the insertion side of the fitting rib 30. Further, one side wall of the bracket side engaging groove 66 in the locking engaging portion 64 is fitted to each of the pair of case side engaging grooves 42 and 42 in the engaging lock portion 34. Further, the plate-like elastic locking piece 38 is locked to the locking projection 72. Thereby, the displacement to the direction which the bracket 16 detaches | leaves from the electrical junction box main body 12 is blocked | prevented. It should be noted that the state of locking of the plate-like elastic locking piece 38 to the locking protrusion 72 can be released by elastically deforming the free end of the plate-like elastic locking piece 38 toward the bottom surface side of the locking groove 70.

  As is clear from the above description, in the present embodiment, the engagement lock portion 34 and the lock engagement portion 64 constitute an engagement portion. Further, in a state where the bracket 16 is assembled to the electrical junction box body 12, the entire short side wall surface 28 of the electrical junction box body 12 is covered by the case side fixing portion 48 of the bracket 16 (see FIGS. 1 to 3). ). Furthermore, the bottom surface of the drainage groove 44 is lowered toward the vehicle panel 14 while the bracket 16 is attached to the vehicle panel 14, and the drainage groove 44 is opened toward the vehicle panel 14. The opening end surface of the drainage groove 44 toward the vehicle panel 14 is located away from the vehicle panel 14 (see FIG. 4).

  The lower bracket 18 is different in appearance from the upper bracket 16 but has the same mounting structure to the electrical junction box body 12. Further, the lower bracket 18 has a bolt insertion hole 80 formed in a mounting plate portion 78 overlapped at a predetermined position of the vehicle panel 14, and the vehicle panel 14 is fixed by a fixing bolt inserted into the bolt insertion hole 80. It is supposed to be fixed to.

  In the electrical junction box 10, a drainage groove 44 is formed on the upper surface of the bracket 16 positioned above the electrical junction box body 12 in a state of being attached to the vehicle panel 14, and the drainage groove 44 is formed on the vehicle panel 14 side. Therefore, the water transmitted from the vehicle panel 14 to the bracket 16 can be drained from the drainage groove 44 to the vehicle panel 14 side. Thereby, it becomes possible to avoid the flooding of the electrical junction box main body 12.

  In particular, in the present embodiment, the drainage groove 44 is provided along the central protrusion 74 and the upper surface of the bracket 16 is inclined to the drainage groove 44 from both sides in the width direction. Thus, the water that has been transferred to the bracket 16 can be efficiently collected in the drainage groove 44.

  In addition, since the end of the drainage groove 44 on the side of the electrical junction box main body 12 is stopped at the water stop wall 76, it is possible to prevent the water collected in the drainage groove 44 from being transmitted to the electrical junction box main body 12. I can do it.

  Furthermore, since the bottom surface of the drainage groove 44 is an inclined surface that descends toward the vehicle panel 14, the water collected in the drainage groove 44 can be made to easily flow toward the vehicle panel 14.

  Furthermore, in the present embodiment, the width of the main body 50 gradually increases as the main body 50 moves from the panel-side fixing portion 46 to the case-side fixing portion 48, so that the flow path area is increased. Even if water flows to the electric junction box main body 12 side through this, it can be prevented that the electric junction box main body 12 is reached.

  Moreover, in this embodiment, since the case side fixing | fixed part 48 has covered the whole short side wall surface 28 of the electrical junction box main body 12, it can prevent effectively that water splashes on the electrical junction box main body 12. FIG.

  Furthermore, in this embodiment, since the water stop protrusion 58 is provided on the edge of the upper end surface of the contact plate 54 on the side opposite to the vehicle panel 14, the water transmitted through the vehicle panel 14 is transmitted to the main body 50. Can be prevented.

  As mentioned above, although one Embodiment of this invention was explained in full detail, for example, an engaging part is not limited to the structure as described in the said embodiment. Further, the shape and number of drainage grooves, the arrangement location, and the like are not limited to the above-described embodiment, and can be arbitrarily set.

  Furthermore, in the above-described embodiment, the upper surface of the bracket 16 may be lowered not only toward the drainage groove 44 but also from the case side fixing portion 48 to the panel side fixing portion 46. Thereby, transmission of water to the electrical junction box body 12 can be more effectively prevented.

10: Electrical junction box, 12: Electrical junction box body, 14: Vehicle panel, 16: Bracket (attachment leg), 18: Bracket (attachment leg), 34: Engagement lock part (engagement part), 44: Drainage groove, 46: Panel side fixing part (fixing part to vehicle panel), 48: Case side fixing part (widening part), 50: Main body part (connection plate part), 54: Contact plate, 60: Water stop protrusion , 66: locking engaging portion (engaging portion), 82: water blocking wall

Claims (7)

An electrical connection box of a vertical mounting type in which an electrical connection box main body is disposed opposite to a vertical wall portion of a vehicle panel and is attached to the vehicle panel by a plurality of mounting legs protruding from the electrical connection box main body. ,
At least one of the mounting legs is a separate structure from the electrical junction box body, and a fixing portion to the vehicle panel is provided at one end of the mounting leg, and the other end of the mounting leg An detachable engaging portion is provided between the lower surface of the portion and the upper end of the electric junction box body, while the upper surface of the mounting leg portion is directed from the other end side toward the one end portion side. An electrical junction box characterized in that a drainage groove is formed which extends and opens on the vehicle panel side.   An abutment plate that is superimposed on a vertical wall portion of the vehicle panel is provided at a portion of the mounting leg that is fixed to the vehicle panel so as to fix the contact plate to the vehicle panel, and an upper end surface of the abutment plate. The electrical junction box according to claim 1, wherein a water stop protrusion is formed apart from the vehicle panel and extending in parallel with the vehicle panel.   The drainage groove is formed in a central portion in the width direction of the upper surface of the mounting leg portion, and the upper surface of the mounting leg portion is provided with an inclination inclined downward from both sides in the width direction toward the drainage groove. The electrical junction box according to claim 1 or 2.   The electrical junction box according to any one of claims 1 to 3, wherein a water blocking wall is formed at an end of the drainage groove on the electrical junction box main body side.   The electrical junction box according to any one of claims 1 to 4, wherein a bottom surface of the drainage groove is inclined downward from the electrical junction box body side toward the vehicle panel side.   The mounting leg portion has a widened shape in which a width dimension gradually increases from one end side fixed to the vehicle panel toward the other end side attached to the electric junction box body. The electrical junction box according to any one of 1 to 5.   The electrical connection box according to any one of claims 1 to 6, wherein the mounting leg portion includes a connecting plate portion extending in a horizontal direction between opposing surfaces of the vehicle panel and the electrical connection box main body.

Images