JP6611366B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box.

  Conventionally, there is an electrical junction box having an engaging portion that engages with a structure. Patent Document 1 discloses a technique of an electrical connection box in which a locking clip protruding from one side wall of a case of an electrical connection box is inserted and locked into a locking hole of a vehicle body panel and fixed by cantilever support. Yes.

JP 2008-104329 A

  There is still room for improvement in suppressing rattling at the engaging portion.

  An object of the present invention is to provide an electrical junction box capable of suppressing backlash at an engaging portion.

  An electrical junction box according to the present invention includes a housing that accommodates an electronic component, and the housing is fixed to a first support portion of the structure, and a second support of the structure. An engagement portion that is inserted into a hole portion of the portion and engages with the second support portion, and an abutment portion that abuts on the structure at a position between the fixed portion and the engagement portion, And the engaging portion protrudes from the insertion portion in a direction intersecting the insertion direction into the hole, and the insertion portion is inserted into the hole. A locked portion that is locked by the second support portion in a state of being inserted into the first support portion, the fixed portion being fixed to the first support portion, and the contact portion being the structure , And the engaging portion engages with the second support portion to give a rotational moment to the housing, and the rotational moment is Serial to the insertion direction, characterized in that the action of opposite forces relative to the insertion portion.

  The electrical junction box according to the present invention includes a housing that houses electronic components. The housing is engaged with the fixed portion fixed to the first support portion of the structure and the hole inserted into the second support portion of the structure to engage with the second support portion. And a contact portion that contacts the structure at a position between the fixed portion and the engagement portion. The engaging portion protrudes from the insertion portion in the direction intersecting the insertion direction into the hole portion and the insertion portion to be inserted into the hole portion, and the second support is provided with the insertion portion being inserted into the hole portion. A locked portion that is locked by the portion.

  The fixed part is fixed to the first support part, the contact part is in contact with the structure, and the engagement part is engaged with the second support part, so that a rotational moment is applied to the housing. Applies a force in a direction opposite to the insertion direction to the insertion portion. According to the electrical junction box of the present invention, it is possible to press the locked portion toward the second support portion by the rotational moment, and there is an effect that rattling can be suppressed.

FIG. 1 is a perspective view of an electrical junction box according to the embodiment. FIG. 2 is a side view of the electrical junction box according to the embodiment. FIG. 3 is another perspective view of the electrical junction box according to the embodiment. FIG. 4 is an exploded perspective view of the housing according to the embodiment. FIG. 5 is a perspective view of a fixed portion according to the embodiment. FIG. 6 is a side view of the left engaging portion according to the embodiment. FIG. 7 is a cross-sectional view of the left engaging portion according to the embodiment. FIG. 8 is a side view of the right engagement portion according to the embodiment. FIG. 9 is a cross-sectional view of the right engaging portion according to the embodiment. FIG. 10 is a side view showing fixing of the fixed portion to the first support portion. FIG. 11 is a side view showing a state before the left engagement portion is engaged with the second support portion. FIG. 12 is a side view of a state in which the contact portion is in contact with the second support portion. FIG. 13 is a side view of a state in which the engaging portion is engaged with the second support portion. FIG. 14 is an explanatory diagram of the moment applied to the housing. FIG. 15 is a side view of the housing according to the first modification of the embodiment.

  Hereinafter, an electrical junction box according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[Embodiment]
The embodiment will be described with reference to FIGS. 1 to 14. The present embodiment relates to an electrical junction box. 1 is a perspective view of an electrical junction box according to the embodiment, FIG. 2 is a side view of the electrical junction box according to the embodiment, FIG. 3 is another perspective view of the electrical junction box according to the embodiment, and FIG. FIG. 5 is a perspective view of a fixed portion according to the embodiment, FIG. 6 is a side view of a left engagement portion according to the embodiment, and FIG. 7 is a perspective view of the embodiment. FIG. 8 is a side view of the right engaging portion according to the embodiment, and FIG. 9 is a sectional view of the right engaging portion according to the embodiment. 7 shows a VII-VII cross section of FIG. 4, and FIG. 9 shows a IX-IX cross section of FIG.

  The electrical junction box 1 of this embodiment is attached to a structure and is held by the structure. In the present embodiment, the attachment target of the electrical junction box 1 is a vehicle such as an automobile. As shown in FIGS. 1 to 3, the electrical junction box 1 has a housing 2 that houses electronic components. The overall shape of the housing 2 of the present embodiment is a rectangular parallelepiped.

  As shown in FIG. 4, the housing 2 has a frame 10 and a lower cover 30. The housing 2 of the present embodiment is fixed to the vehicle body in such a posture that the frame 10 is positioned above the lower cover 30 in the vehicle vertical direction Z. The frame 10 includes a main body part 11, electric wire insertion parts 12 and 13, and a fixed part 14. The main body 11, the wire insertion parts 12 and 13, and the fixed part 14 are integrally formed of synthetic resin or the like. The main body 11 is a rectangular tube-shaped component. The cross-sectional shape of the main body 11 of this embodiment is a rectangle. In the following description, “width direction W” indicates a longitudinal direction of a rectangle which is a cross-sectional shape of the main body 11. Further, “depth direction D” indicates a short direction of the rectangle. The width direction W and the depth direction D are orthogonal to each other. Further, the vehicle vertical direction Z is orthogonal to the width direction W and the depth direction D.

  The main body 11 includes a first wall 11a, a second wall 11b, a third wall 11c, and a fourth wall 11d. The first wall portion 11 a and the second wall portion 11 b face each other in the width direction W of the frame 11. The third wall portion 11 c and the fourth wall portion 11 d face each other in the depth direction D of the frame 11. In the following description, in the width direction W, the second wall portion 11b side when viewed from the first wall portion 11a is referred to as “right side”, and the first wall portion 11a side when viewed from the second wall portion 11b. This is referred to as “left side”. Further, in the depth direction D, the fourth wall 11d side when viewed from the third wall portion 11c is referred to as a “back side”, and the third wall portion 11c side when viewed from the fourth wall portion 11d is referred to as “front surface”. Referred to as “side”.

  The main body 11 has a storage chamber 11e for storing electronic components. The accommodating chamber 11e is provided with an engagement mechanism that engages with the electronic component and holds the electronic component. For example, electronic components such as relays and fuses are held in the storage chamber 11e.

  A plurality of insertion portions 11 f are provided on the outer surface of the main body portion 11. A protrusion 31f of the lower cover 30, which will be described later, is inserted into the insertion part 11f. A claw portion that engages with the protrusion 31f is formed on the inner side surface of the insertion portion 11f. The wire insertion portions 12 and 13 are cylindrical or semi-cylindrical components that protrude from the main body 11. For example, an electric wire connected to the power source side of the vehicle, an electric wire connected to an electrical component, or the like is inserted into the electric wire insertion portions 12 and 13. In the electrical junction box 1 of the present embodiment, the wire insertion portions 12 and 13 are arranged diagonally in the main body 11.

  The fixed portion 14 is fixed to the first support portion 101 of the vehicle. The fixed portion 14 of the present embodiment engages with the first support portion 101 while sliding. The fixed portion 14 is disposed on the fourth wall portion 11 d of the main body portion 11, that is, the wall portion on the back side. The fixed portion 14 is disposed at the center in the width direction W of the fourth wall portion 11d. As shown in FIGS. 3 and 5, the fixed portion 14 includes a pair of guide portions 15 and 16, a protruding portion 17, and a pair of ribs 18 and 19. The pair of guide portions 15, 16 extends along the vehicle vertical direction Z and faces each other in the width direction W of the electrical junction box 1. Each of the guide portions 15 and 16 is a component portion having an L-shaped cross section and protrudes from the outer surface of the fourth wall portion 11d.

  The guide portion 15 has a protruding wall portion 15a and an opposing wall portion 15b. The protruding wall portion 15a protrudes from the fourth wall portion 11d in a direction orthogonal to the fourth wall portion 11d. The opposing wall portion 15b protrudes toward the guide portion 16 from the tip of the protruding wall portion 15a. The facing wall portion 15b faces the fourth wall portion 11d in the depth direction D. The guide portion 16 has a protruding wall portion 16a and an opposing wall portion 16b. The protruding wall portion 16a protrudes from the fourth wall portion 11d in a direction orthogonal to the fourth wall portion 11d. The opposing wall portion 16b protrudes toward the guide portion 15 from the tip of the protruding wall portion 16a. The facing wall portion 16b faces the fourth wall portion 11d in the depth direction D. The ends of the opposing wall portions 15b and 16b in the guide portions 15 and 16 are opposed to each other in the width direction W. That is, the guide portions 15 and 16 have L-shaped tips protruding toward the other side.

  The pair of ribs 18 and 19 are disposed between the pair of guide portions 15 and 16 in the width direction W. The pair of ribs 18 and 19 extend along the vehicle vertical direction Z and face each other in the width direction W. Each of the ribs 18 and 19 has a flat plate shape and protrudes from the outer surface of the fourth wall portion 11d. The ribs 18 and 19 protrude toward the tips of the opposing wall portions 15b and 16b of the guide portions 15 and 16.

  The protrusion 17 is disposed between the ribs 18 and 19 in the width direction W. The projecting portion 17 projects from the outer surface of the fourth wall portion 11d. An engaging projection 17a is provided at the tip of the protruding portion 17 in the protruding direction. The engagement protrusion 17 a protrudes from the tip surface 17 b of the protrusion 17. The engagement protrusion 17 a protrudes in the depth direction D from the tips of the ribs 18 and 19.

  Referring to FIG. 4, the lower cover 30 is a cover member that closes an opening below the frame 10. The lower cover 30 includes a main body 31, leg portions 32 and 33, a wire insertion portion 34, and an engagement portion 35. The main body 31, the leg portions 32 and 33, and the wire insertion portion 34 are integrally formed of synthetic resin or the like. The main body 31 is a plate-shaped component having a rectangular shape in plan view.

  The main body 31 includes a first side wall part 31a, a second side wall part 31b, a third side wall part 31c, a fourth side wall part 31d, and a bottom wall part 31e. Each side wall part 31a, 31b, 31c, 31d protrudes from the edge part of the bottom wall part 31e toward the direction intersecting the bottom wall part 31e. The first side wall 31a and the second side wall 31b face each other in the width direction W. The third side wall 31c and the fourth side wall 31d face each other in the depth direction D. The side wall portions 31a, 31b, 31c, and 31d are wall portions corresponding to the wall portions 11a, 11b, 11c, and 11d of the frame 11.

  The side wall portions 31 a, 31 b, 31 c, and 31 d are fitted with the opening below the frame 10. On the outer side surfaces of the side wall portions 31a, 31b, 31c, and 31d, strip-shaped protrusion portions 31f are provided, respectively. The protrusion 31f protrudes upward from the upper ends of the side walls 31a, 31b, 31c, and 31d. The protrusion 31f has an engagement recess 31g. The protruding portion 31f is inserted into the insertion portion 11f of the frame 10 from below. The protrusion 31f is locked by engaging the claw provided in the insertion portion 11f with the engagement recess 31g of the protrusion 31f. Each protrusion 31f engages with the corresponding insertion portion 11f, whereby the lower cover 30 is assembled to the frame 10 and fixed to the frame 10.

  The wire insertion part 34 corresponds to the wire insertion part 13 of the frame 10. The electric wire insertion portion 34 is a semi-cylindrical component that protrudes from the main body 31. The wire insertion part 34 is combined with the insertion part 13 of the frame 10 to form a cylindrical part.

  The left leg portion 32 and the right leg portion 33 are disposed on the side wall portion 31 c on the front surface side of the main body 31. That is, the leg parts 32 and 33 are arrange | positioned with respect to the storage chamber 11e at the front side. The left leg 32 is provided at the left end of the third side wall 31c. The left leg portion 32 protrudes from the third side wall portion 31c toward the front surface side in the depth direction D. The right leg 33 is provided at the right end of the third side wall 31c. The right leg 33 protrudes obliquely rightward from the third side wall 31c toward the front side. In other words, the right leg 33 protrudes away from the left leg 32 as it goes from the proximal end to the distal end.

  The engaging part 35 has a left engaging part 36 and a right engaging part 37. The left engagement portion 36 protrudes downward from the left leg portion 32. The right engaging portion 37 protrudes downward from the right leg portion 33. As shown in FIG. 3, the engaging portion 35 engages with holes 103 and 104 provided in the second support portion 102 of the vehicle. The left engagement portion 36 engages with the left hole 103. The right engagement portion 37 engages with the right hole portion 104. The 2nd support part 102 is a panel which comprises the vehicle body of a vehicle, for example. The two holes 103 and 104 are formed in the same panel, for example.

  As shown in FIG. 6, the left engagement portion 36 includes an insertion portion 38 and locked portions 39 and 40. The insertion portion 38 is a cylindrical component and protrudes from the bottom surface 32a of the left leg portion 32 toward the lower side of the vehicle vertical direction Z. The locked portions 39 and 40 protrude from the outer peripheral surface of the insertion portion 38. The pair of locked portions 39 and 40 are disposed at positions symmetrical with respect to the central axis of the insertion portion 38. The back side locked portion 39 protrudes from the back side position of the insertion portion 38 toward the back side. The front side locked portion 40 protrudes from the front side position in the insertion portion 38 toward the front side.

  As shown in the sectional view of FIG. 7, the locked portions 39 and 40 protrude obliquely upward from the distal end portion of the insertion portion 38. The locked portions 39 and 40 are plate-shaped or column-shaped components, respectively, and one end is connected to the distal end of the insertion portion 38. The insertion portion 38 is provided with a groove 38a extending along the central axis C1 of the insertion portion 38. One end of the locked portions 39 and 40 is connected to the bottom of the groove 38a, and the other end protrudes from the groove 38a. The rear side locked portion 39 is inclined so as to move away from the insertion portion 38 toward the back side as it goes from the proximal end connected to the insertion portion 38 to the distal end. The front side locked portion 40 is inclined so as to move away from the insertion portion 38 toward the front side as it goes from the proximal end connected to the insertion portion 38 to the distal end.

  The locked portions 39 and 40 have tapered surfaces 39a and 40a and contact surfaces 39b and 40b. The tapered surfaces 39a and 40a are inclined with respect to the central axis C1 of the insertion portion 38. More specifically, the taper surface 39a of the back side locked portion 39 is inclined so as to move away from the central axis C1 toward the back side as it goes from the proximal end to the distal end of the back side locked portion 39. ing. The taper surface 40a of the front side locked portion 40 is inclined so as to move away from the central axis C1 toward the front side as it goes from the proximal end to the distal end of the front side locked portion 40.

  The contact surfaces 39b and 40b are provided on the distal end side of the locked portions 39 and 40 with respect to the tapered surfaces 39a and 40a. The contact surfaces 39b and 40b are inclined so as to be separated from the central axis C1 toward the distal end side of the locked portions 39 and 40. The contact surfaces 39 b and 40 b contact the inner peripheral surface of the left hole 103 when the left engagement part 36 is engaged with the left hole 103.

  Locked surfaces 39c and 40c are provided between the tapered surfaces 39a and 40a and the contact surfaces 39b and 40b. The locked surfaces 39c and 40c are stepped surfaces that are directed toward the central axis C1 from the tapered surfaces 39a and 40a toward the contact surfaces 30b and 40b. In other words, the locked surfaces 39 c and 40 c are surfaces that face the upper side in the vehicle vertical direction Z and are surfaces that face the proximal end side of the insertion portion 38. The locked surfaces 39 c and 40 c are surfaces that are locked by the second support portion 102 when the left engagement portion 36 is engaged with the left hole 103. Since the locked surfaces 39c and 40c are locked by the second support portion 102, the left engagement portion 36 is restricted from moving in the removal direction. In the to-be-latched parts 39 and 40, the thickness on the distal end side from the to-be-latched surfaces 39c and 40c is thinner than the thickness on the base end side from the to-be-latched surfaces 39c and 40c.

  The bottom surface 32 a of the left leg 32 is inclined with respect to the depth direction D. The bottom surface 32a is inclined to the upper side in the vehicle vertical direction Z as it goes to the front side. In other words, the bottom surface 32 a is inclined so as to go upward in the vehicle vertical direction Z as it moves away from the fixed portion 14 of the frame 10 toward the front surface side. Corresponding to the inclination of the bottom surface 32a, the insertion portion 38 is inclined with respect to the vehicle vertical direction Z. The insertion portion 38 is inclined so as to go to the front side as it goes to the vehicle lower side. In other words, the insertion portion 38 is inclined so as to be directed toward the front surface side toward the distal end in the protruding direction protruding from the bottom surface 32a.

  A contact portion 41 is provided on the left leg portion 32. The contact part 41 is a protrusion protruding from the bottom surface 32a. The contact portion 41 is disposed on the back side with respect to the left engagement portion 36. That is, the contact portion 41 is disposed between the left engagement portion 36 and the fixed portion 14 of the frame 10. The contact portion 41 is, for example, a rib extending linearly along the width direction W. The position of the contact portion 41 in the depth direction D is a position on the back side with respect to the back side locked portion 39 and in the vicinity of the back side locked portion 39.

  As shown in FIG. 8, the right engagement portion 37 includes an insertion portion 44 and locked portions 45 and 46. The insertion portion 44 is a cylindrical component and protrudes from the bottom surface 33a of the right leg 33 toward the lower side of the vehicle vertical direction Z. The locked portions 45 and 46 protrude from the outer peripheral surface of the insertion portion 44. The pair of locked portions 45 and 46 are disposed at positions symmetrical with respect to the central axis C <b> 2 of the insertion portion 44. The back side locked portion 45 protrudes from the back side position of the insertion portion 44 toward the back side. The front side locked portion 46 protrudes from the front side position of the insertion portion 44 toward the front side.

  As shown in the cross-sectional view of FIG. 9, the locked portions 45 and 46 protrude obliquely upward from the distal end portion of the insertion portion 44. The locked portions 45 and 46 are plate-like or columnar constituent portions, respectively, and one end is connected to the tip of the insertion portion 44. The insertion portion 44 is provided with a groove 44 a that extends along the central axis C <b> 2 of the insertion portion 44. One end of the locked portions 45 and 46 is connected to the bottom of the groove 44a, and the other end protrudes from the groove 44a. The rear side locked portion 45 is inclined so as to move away from the insertion portion 44 toward the back side as it goes from the proximal end connected to the insertion portion 44 to the distal end. The front side locked portion 46 is inclined so as to move away from the insertion portion 44 toward the front side as it goes from the proximal end connected to the insertion portion 44 to the distal end.

  The locked portions 45 and 46 have tapered surfaces 45a and 46a and contact surfaces 45b and 46b. The tapered surfaces 45 a and 46 a are inclined with respect to the central axis C <b> 2 of the insertion portion 44. More specifically, the taper surface 45a of the back side locked portion 45 is inclined so as to move away from the central axis C2 toward the back side as it goes from the proximal end to the distal end of the back side locked portion 45. ing. The taper surface 46a of the front side locked portion 46 is inclined so as to move away from the central axis C2 toward the front side as it goes from the proximal end to the distal end of the front side locked portion 46.

  The contact surfaces 45b and 46b are provided on the front end side of the locked portions 45 and 46 with respect to the tapered surfaces 45a and 46a. The contact surfaces 45b and 46b are inclined so as to move away from the central axis C2 toward the distal ends of the locked portions 45 and 46. The contact surfaces 45 b and 46 b contact the inner peripheral surface of the right hole 104 when the right engagement portion 37 is engaged with the right hole 104.

  Locked surfaces 45c and 46c are provided between the tapered surfaces 45a and 46a and the contact surfaces 45b and 46b. The locked surfaces 45c and 46c are stepped surfaces that move toward the central axis C2 from the tapered surfaces 45a and 46a toward the contact surfaces 45b and 46b. In other words, the locked surfaces 45 c and 46 c are surfaces that face the upper side in the vehicle vertical direction Z and are surfaces that face the proximal end side of the insertion portion 44. The locked surfaces 45 c and 46 c are surfaces that are locked by the second support portion 102 when the right engaging portion 37 is engaged with the right hole portion 104. In the to-be-latched parts 45 and 46, the thickness on the distal end side from the to-be-latched surfaces 45c and 46c is thinner than the thickness on the base end side from the to-be-latched surfaces 45c and 46c.

  The bottom surface 33 a of the right leg 33 is inclined with respect to the depth direction D. The bottom surface 33a is inclined to the upper side in the vehicle vertical direction Z as it goes to the front side. In other words, the bottom surface 33a is inclined so as to go upward in the vehicle vertical direction Z as it moves away from the fixed portion 14 of the frame 10 toward the front surface side. Corresponding to the inclination of the bottom surface 33a, the insertion portion 44 is inclined with respect to the vehicle vertical direction Z. The insertion portion 44 is inclined so as to go to the front side as it goes to the vehicle lower side. In other words, the insertion portion 44 is inclined so as to be directed toward the front surface side toward the distal end in the protruding direction protruding from the bottom surface 33a.

  A contact portion 47 is provided on the right leg 33. The contact part 47 is a protrusion protruding from the bottom surface 33a. The contact portion 47 is disposed on the back side of the right engagement portion 37. That is, the abutting portion 47 is disposed between the right engaging portion 37 and the fixed portion 14 of the frame 10. The contact portion 47 is, for example, a rib extending linearly along the width direction W. The direction in which the contact portion 47 extends may be a direction orthogonal to a line connecting the fixed portion 14 and the right engagement portion 37. The position of the contact portion 47 in the depth direction D is a position closer to the back side than the back side locked portion 45 and a position near the back side locked portion 45.

  The first support portion 101 and the second support portion 102 shown in FIG. 3 and the like are structures to which the electrical junction box 1 is fixed. The 1st support part 101 and the 2nd support part 102 are formed with metals, such as a steel plate, for example. The first support portion 101 is a rectangular plate-shaped component. The first support portion 101 extends upward along the vehicle vertical direction Z. The first support portion 101 may be, for example, a part of a panel constituting the vehicle body of the vehicle or a bracket fixed to the panel. The upper end side of the first support portion 101 is a free end, and the lower end side is fixed to the vehicle body. A through hole 101 a is formed near the upper end of the first support portion 101.

  The second support portion 102 is a plate-shaped component. The left engaging portion 36 and the right engaging portion 37 may be fixed to the same member or may be fixed to separate members. The second support portion 102 extends in the vehicle front-rear direction and the vehicle width direction, and is typically orthogonal to the vehicle vertical direction Z. The second support part 102 is formed with a left hole part 103 and a right hole part 104. The hole portions 103 and 104 are through holes that respectively penetrate the second support portion 102 in the plate thickness direction. The holes 103 and 104 are formed so that they can be inserted through the engaging portions 36 and 37, respectively. The shape of the holes 103 and 104 in the present embodiment is a circular shape corresponding to the cross-sectional shape of the insertion portions 38 and 44.

  The electrical junction box 1 is assembled to the vehicle body with the lower cover 30 assembled to the frame 10. The housing 2 is fixed to the vehicle body by engaging the fixed portion 14 with the first support portion 101 and then engaging the engaging portion 35 with the second support portion 102. Is done.

  As shown in FIG. 10, the fixed portion 14 of the housing 2 is engaged with the first support portion 101 while sliding from the upper side to the lower side in the vehicle vertical direction Z. The first support portion 101 is inserted between the guide portions 15 and 16. As shown in FIG. 3, the first support portion 101 is guided by the opposing wall portions 15 b and 16 b of the guide portions 15 and 16 and the ribs 18 and 19. When the fixed portion 14 is pressed toward the lower side of the vehicle vertical direction Z, the engagement protrusion 17a of the protrusion 17 is engaged with the through hole 101a. When the engagement protrusion 17a is engaged with the through hole 101a, the engagement of the fixed portion 14 with the first support portion 101 is completed. The opposing wall portions 15 b and 16 b sandwich the first support portion 101 between the ribs 18 and 19 and restrict relative movement of the housing 2 in the depth direction D with respect to the first support portion 101. The engagement protrusion 17 a restricts relative movement of the housing 2 in the vehicle vertical direction Z with respect to the first support portion 101.

  When the fixed portion 14 is engaged with the first support portion 101, the engagement portion 35 is engaged with the second support portion 102. FIG. 11 is a side view showing the left engagement portion 36 when the fixed portion 14 is engaged with the first support portion 101. The electrical junction box 1 of the present embodiment is configured such that the engaging portion 35 does not engage with the second support portion 102 when the fixed portion 14 engages with the first support portion 101. For example, when the fixed portion 14 is engaged with the first support portion 101, a part of the left engagement portion 36 is inserted into the left hole 103 and the left engagement portion 36 and the second support portion 102 are inserted. And the housing 2 are designed so that they do not reach the engaged state.

  From the state shown in FIG. 11, the case 2 is bent and deformed by applying a downward force F <b> 1 in the vehicle vertical direction Z to the left leg 32, and the left engagement portion 36 is moved to the left hole 103. It is inserted further. The electrical junction box 1 of the present embodiment is configured such that the contact portions 41 and 47 contact the second support portion 102 before the engagement portions 36 and 37 engage with the second support portion 102. Has been. Referring to FIG. 12, when the left engagement portion 36 is inserted into the left hole 103, the contact portion 41 is second before the front side locked portion 40 is locked. The support part 102 is contacted. Here, the locked state of the front side locked portion 40 means a state where the locked surface 40 c passes through the left hole 103, that is, the locked surface 40 c is lower than the lower side surface 102 a of the second support portion 102. This is a state located below the vehicle vertical direction Z.

  As shown in FIG. 12, the locked surface 40 c does not pass through the left hole 103 at the timing when the contact portion 41 contacts the second support portion 102. In other words, the front-side locked portion 40 is in a state where the tapered surface 40 a is in contact with the inner peripheral surface of the left hole 103. From this state, when a force F1 that presses downward in the vehicle vertical direction Z is further applied, the housing 2 is further bent and deformed, and the front side locked portion 40 is in a locked state. Engagement of the left engagement portion 36 with the second support portion 102 is completed when the front side engaged portion 40 is in the locked state. The engagement of the right engagement portion 37 with the second support portion 102 is performed in the same manner.

  FIG. 13 is a side view showing a state in which the left engagement portion 36 and the right engagement portion 37 are engaged with the second support portion 102. The casing 2 is given rotational moments M1 and M2. The rotational moment M1 is a rotational moment acting on the left leg portion 32. Since the contact portion 41 is in contact with the second support portion 102, the rotational moment M1 biases the front side portion of the left leg 32 toward the upper side in the vehicle vertical direction Z with respect to the contact portion 41. To do. Accordingly, a force F2 directed upward in the vehicle vertical direction Z is applied to the left engagement portion 36 by the rotational moment M1. In other words, the rotational moment M <b> 1 causes a force F <b> 2 in the direction opposite to the insertion direction with respect to the left hole 103 to act on the insertion portion 38 of the left engagement portion 36. By this force F <b> 2, the locked surface 40 c of the front side locked portion 40 is pressed toward the lower side surface 102 a of the second support portion 102.

  Therefore, the contact portion 41 and the locked surface 40c sandwich the second support portion 102 from both sides in the vehicle vertical direction Z by the rotational moment M1. A so-called zero touch state is realized in which a gap between the contact portion 41 and the locked surface 40c and the second support portion 102 does not substantially occur. By the rotation moment M1, the contact portion 41 and the locked surface 40c are pressed toward the second support portion 102, so that the backlash between the left engagement portion 36 and the second support portion 102 is substantially reduced. Will not occur.

  The rotational moment M <b> 2 is a rotational moment that acts on the right leg 33. Since the contact portion 47 is in contact with the second support portion 102, the rotational moment M2 biases the front side portion of the right leg 33 from the contact portion 47 toward the upper side in the vehicle vertical direction Z. To do. Therefore, a force F3 directed upward in the vehicle vertical direction Z is applied to the right engagement portion 37 by the rotational moment M2. In other words, the rotational moment M <b> 2 causes a force F <b> 3 in the direction opposite to the insertion direction with respect to the right hole portion 104 to act on the insertion portion 44 of the right engagement portion 37. By this force F <b> 3, the locked surface 46 c of the front side locked portion 46 is pressed toward the lower side surface 102 a of the second support portion 102.

  Therefore, the contact portion 47 and the locked surface 46c sandwich the second support portion 102 from both sides in the vehicle vertical direction Z by the rotational moment M2. A so-called zero touch state is realized in which a gap between the contact portion 47 and the locked surface 46c and the second support portion 102 does not substantially occur. By the rotation moment M2, the contact portion 47 and the locked surface 46c are pressed toward the second support portion 102, so that the play between the right engagement portion 37 and the second support portion 102 is substantially reduced. Will not occur.

  Thus, the electrical junction box 1 of this embodiment can reduce the backlash between the engaging part 35 and the 2nd support part 102, and can reduce the vibration of the housing | casing 2. FIG. By reducing the vibration, the electronic components, the engaging portion 35, and the like housed in the housing chamber 11e are protected from vibration. Due to the bending deformation of the housing 2, tension is applied to the locks (locked surfaces 40c, 46c) of the front side locked portions 40, 46, and rattling is unlikely to occur.

  As described above, the electrical junction box 1 of the present embodiment has the housing 2 that accommodates electronic components. The housing 2 includes a fixed portion 14, an engagement portion 35, and contact portions 41 and 47. The fixed portion 14 is fixed to the first support portion 101 of the structure. The engaging portion 35 is inserted into the holes 103 and 104 included in the second support portion 102 of the structure and engages with the second support portion 102. The contact portions 41 and 47 contact the structure at a position between the fixed portion 14 and the engagement portion 35.

  The engaging portion 35 has insertion portions 38 and 44 to be inserted into the hole portions 103 and 104, and locked portions 40 and 46. The locked portions 40 and 46 protrude from the insertion portions 38 and 44 in a direction crossing the insertion direction into the holes 103 and 104. The locked portions 40 and 46 are locked by the second support portion 102 in a state where the insertion portions 38 and 44 are inserted into the holes 103 and 104.

  The fixed portion 14 is fixed to the first support portion 101, the contact portions 41 and 47 are in contact with the structure, and the engagement portion 35 is engaged with the second support portion 102, so that the housing 2 is engaged. Rotational moments M1 and M2 are applied. The rotational moments M1 and M2 cause forces F2 and F3 in the direction opposite to the insertion direction to act on the insertion portions 38 and 44. According to the electrical connection box 1 of the present embodiment, the locked portions 40 and 46 can be maintained in the locked state by the second support portion 102 by the forces F2 and F3 caused by the rotational moments M1 and M2. Therefore, the electrical junction box 1 of this embodiment can suppress the play between the engaging part 35 and the second support part 102, and can suppress vibration.

  The housing 2 of the present embodiment includes a storage chamber 11e that stores electronic components. The to-be-fixed part 14 and the engaging part 35 are arrange | positioned on the mutually different side on both sides of the storage chamber 11e. The fixed portion 14 disposed on one side with respect to the storage chamber 11 e is fixed to the first support portion 101 and is held by the first support portion 101. The engaging portion 35 disposed on the other side with respect to the storage chamber 11 e engages with the second support portion 102. By suppressing the backlash between the engaging portion 35 and the second support portion 102, the entire backlash of the electrical junction box 1 is also suppressed as described below.

  In the electrical junction box 1 of the present embodiment, as shown in FIG. 14, a rotational moment M3 acts on the fixed portion 14. Due to the rotational moment M3, a force F4 directed toward the front surface acts on the fixed portion 14. The opposing wall portions 15 b and 16 b are pressed toward the first support portion 101 by this force F4. As a result, backlash between the fixed portion 14 and the first support portion 101 is suppressed. Therefore, in the electrical junction box 1 of the present embodiment, play between the vehicle body and the vehicle body is suppressed at the three engagement points with the vehicle body. The opposing wall portions 15b and 16b of the fixed portion 14 of the present embodiment are opposed to the first support portion 101 from the side opposite to the engaging portion 35 side in the depth direction D. The opposing wall portions 15b and 16b can be brought into surface contact with the first support portion 101 by the force F4 and appropriately suppress the play between the first support portion 101 and the opposing wall portions 15b and 16b.

  The housing 2 of the present embodiment includes leg portions 32 and 33 that protrude toward the opposite side to the fixed portion 14 side. The contact portions 41 and 47 and the engaging portion 35 are provided on the bottom surfaces 32 a and 33 a of the leg portions 32 and 33. The bottom surfaces 32 a and 33 a are opposed surfaces that face the second support portion 102. The left leg portion 32 is provided with a left engagement portion 36 and a contact portion 41 corresponding to the left engagement portion 36. The right leg 33 is provided with a right engaging portion 37 and a contact portion 47 corresponding to the right engaging portion 37. Since the engaging portions 36 and 37 and the corresponding contact portions 41 and 47 are provided on the same leg portions 32 and 33, it is easy to design the bending deformation in the housing 2. For example, desired rotational moments M1, M2, and M3 are easily generated by bending and deforming the leg portions 32 and 33.

  Moreover, in the electrical junction box 1 of this embodiment, the contact parts 41 and 47 are protrusions protruding from the bottom surfaces 32 a and 33 a of the leg parts 32 and 33. Such protrusion-shaped contact portions 41 and 47 can suppress variations in fulcrum positions of the rotational moments M1 and M2.

[First Modification of Embodiment]
A first modification of the embodiment will be described. FIG. 15 is a side view illustrating the main part of the housing according to the first modification of the embodiment. The case 2 of the first modified example is different from the above embodiment in that the bottom surfaces 32 a and 33 a of the leg portions 32 and 33 are parallel to the depth direction D. Even in such a configuration, it is possible to apply the rotational moments M1 and M2 and keep the locked surfaces 40c and 46c in contact with the second support portion 102. In addition, when the 2nd support part 102 is a board parallel to the depth direction D, it is preferable that the contact parts 41 and 47 are protrusions which protrude from the bottom surfaces 32a and 33a.

[Second Modification of Embodiment]
A second modification of the embodiment will be described. The aspect in which the fixed part 14 is engaged with the first support part 101 is not limited to the illustrated aspect. For example, the fixed portion 14 may be engaged with the first support portion 101 by a fastening member such as a screw. The to-be-fixed part 14 may be engaged with the 1st support part 101 by the locking mechanism of the aspect different from illustration.

  The number of the engaging portions 35 is not limited to two. For example, the engaging portion 35 may further include other engaging portions in addition to the left engaging portion 36 and the right engaging portion 37. The number of the engaging portions 35 may be one.

  The shape and arrangement of the contact portions 41 and 47 are not limited to those illustrated. The contact portions 41 and 47 may be bent portions or stepped portions of the leg portions 32 and 33 instead of the protrusions such as ribs.

  The contents disclosed in the above embodiments and modifications can be executed in appropriate combination.

DESCRIPTION OF SYMBOLS 1 Electrical junction box 2 Housing | casing 10 Frame 11 Main body part 11e Storage chamber 11f Insertion part 12, 13 Electric wire insertion part 14 Fixed part 15,16 Guide part 15a, 16a Projection wall part 15b, 16b Opposite wall part 17 Protrusion part 17a Joint projection 18, 19 Rib 30 Lower cover 31 Main body 31a First side wall portion 31b Second side wall portion 31c Third side wall portion 31d Fourth side wall portion 31e Bottom wall portion 31f Protruding portion 31g Engaging recess 32 Left leg portion 33 Right leg portion 34 Electric wire insertion part 35 Engagement part 36 Left side engagement part (engagement part)
37 Right engagement part (engagement part)
38 Insertion part 39 Back side locked part 40 Front side locked part 39a, 40a Tapered surface 39b, 40b Abutting surface 39c, 40c Locked surface 41 Abutting part 44 Insertion part 45 Back side locked part 46 Front side locked portion 45a, 46a Tapered surface 45b, 46b Contact surface 45c, 46c Locked surface 47 Contact portion 101 First support portion 101a Through hole 102 Second support portion 102a Lower side surface 103 Left side hole portion 104 Right hole C1, C2 Center axis F1 Lower force F2, F3 Upper force F4 Front force

Claims (3)

It has a housing that houses electronic components,
The housing is
The body,
A fixed portion disposed on the main body and fixed to the first support portion of the structure;
An engaging portion that is disposed in the main body and is inserted into a hole of the second support portion of the structure and engages with the second support portion;
An abutting portion disposed on the main body and abutting against the structure at a position between the fixed portion and the engaging portion;
Have
The engaging portion protrudes from the insertion portion toward an insertion portion to be inserted into the hole portion and a direction intersecting the insertion direction into the hole portion, and the insertion portion is inserted into the hole portion. A locked portion locked by the second support portion in a state,
The fixed portion is fixed to the first support portion, the contact portion is in contact with the structure, and the engagement portion is engaged with the second support portion to rotate with respect to the housing. A moment is applied,
The housing is configured such that the engagement portion can be engaged with the second support portion by bending and deforming the main body in a state where the contact portion is in contact with the structure.
The rotation moment is generated by bending deformation of the main body, and a force in a direction opposite to the insertion direction is applied to the insertion portion. The housing includes a storage chamber for storing electronic components,
The electrical connection box according to claim 1, wherein the fixed portion and the engaging portion are arranged on different sides with respect to the storage chamber. The housing includes a leg portion protruding toward the opposite side to the fixed portion side,
The electrical connection box according to claim 1, wherein the engagement portion and the contact portion are provided on a facing surface of the leg portion that faces the second support portion.

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