JP7042401B2 - Mounting structure of electrical junction box - Google Patents

Description

This specification discloses techniques for mounting electrical junction boxes.

Conventionally, an electric connection box attached to a vehicle is known. In Patent Document 1, a metal bracket is fixed to a panel plate of a vehicle by welding, bolting, or the like, and an electrical connection box is attached to this bracket. The box body of the electrical connection box is provided with an insertion hole for guiding the bracket and a lock arm that can be bent and deformed. When attaching the electrical junction box to the vehicle, by pushing the electrical junction box downward from above with respect to the bracket, the bracket enters the insertion hole of the box body, and the bracket is inserted into the locking protrusion of the lock arm. By engaging the holes, the electrical junction box is attached to the vehicle.

Japanese Unexamined Patent Publication No. 2003-23716

By the way, in the above configuration, it is necessary to shape the insertion hole in the box body of the electrical connection box and the locking projection of the lock arm according to the bracket. However, since the shape of the bracket is not uniform among different vehicle models, it is necessary to prepare a box body in which an insertion hole or the like having a shape corresponding to the shape of the bracket is formed. Therefore, there is a problem that the shape of the electric connection box cannot be made common and the manufacturing cost is high.

The techniques described herein have been completed on the basis of the above circumstances.
It is an object of the present invention to provide a mounting structure of an electrical junction box and an electrical junction box that can have a common shape for mounting the electrical junction box to a vehicle.

The mounting structure of the electrical junction box described in the present specification is a mounting structure of an electrical junction box for fixing the electrical junction box in which the circuit board is housed in the box body to the mounting portion of the vehicle, and the mounting is described above. The portion is fastened to a resin receiving portion that abuts on the electrical junction box and receives force from the electrical junction box when moving when the electrical junction box is attached, and a fastening member that can be fastened to the box body by a fastening member. The bottom wall of the box body on the mounting portion side is fastened to a resin engaging portion that can be engaged with the receiving portion when the electrical connection box is mounted. It is provided with a fastened portion that is fixed to the fastened portion by fastening the members.

The electrical connection box described in the present specification is an electrical junction box for fixing an electrical junction box in which a circuit board is housed in a box body to a mounting portion having a resin receiving portion and a fastening portion of a vehicle. The bottom wall of the box body on the mounting portion side is a resin engaging portion that engages with the receiving portion when the electrical connection box is mounted, and the fastening portion by a fastening member. It is provided with a fastened portion to be fastened and fixed to.

According to the above configuration, since the engaging portion of the electrical junction box engages with the receiving portion when moving when the electrical junction box is attached, the position when the fastened portion is fastened to the fastening portion by the fastening member. It becomes possible to easily perform the alignment. Here, since both the receiving part and the engaging part used for attaching the electric junction box are made of resin, the shape can be easily processed as compared with the metal bracket, and the receiving part can be received for a plurality of vehicle models. It becomes possible to make the shapes of the portion and the engaging portion common. Therefore, it becomes possible to make the shape for attaching the electric connection box to the vehicle common to different vehicle models.

The following embodiments are preferred as embodiments of the techniques described herein.
In a state where the fastened portion and the fastened portion are not fastened by the fastening member, the front end portion of the engaging portion is engaged with the receiving portion, and the front end portion side of the engaging portion is used as an axis. The electrical connection box can be rotated, and at least one of the mounting portion and the bottom wall is provided with a guide portion for guiding the rotation direction of the electrical connection box.

An insertion hole is formed in the fastened portion, and the guide portion can be inserted into the insertion hole.

The engaging portion has a plate shape, and the receiving portion is formed with a groove portion into which the engaging portion can enter.

On the contact surface between the groove wall of the groove portion and the engaging portion, between the groove wall and the engaging portion in a state where the fastened portion is arranged at a position where the fastening portion can be fastened to the fastening portion. Equipped with ribs to be sandwiched.

The engaging portion can enter the groove portion in a posture in which the electrical connection box is tilted with respect to the receiving portion.

A connector mounted on the circuit board and exposed from an opening of the box body is provided, the engaging portion is arranged on the connector side of the bottom wall, and the fastened portion is arranged with the connector side of the bottom wall. Is located on the other side.

According to the technique described herein, it is possible to standardize the shape for attaching the electrical junction box to the vehicle.

Top view showing the electrical junction box of the embodiment AA sectional view of FIG. BB sectional view of FIG. CC sectional view of FIG. Front view showing an electrical junction box An exploded perspective view of the electrical junction box A perspective view showing a state in which the engaging portion is engaged with the receiving portion when the electrical junction box is attached. Front view showing a state in which the engaging portion is engaged with the receiving portion when the electrical junction box is attached. FIG. 8 is a sectional view taken along the line DD. An enlarged view of the vicinity of the engaging portion and the receiving portion in FIG. A perspective view showing a state in which the electrical connection box is rotated from the state shown in FIG. 7 to the position where the fastened portion is placed on the fastened portion. A cross-sectional view showing a state in which the electrical connection box is rotated from the state shown in FIG. 9 to the position where the fastened portion is placed on the fastened portion. Enlarged view of the vicinity of the engaging portion and the receiving portion in FIG.

<Embodiment>
This embodiment will be described with reference to FIGS. 1 to 13. The electric connection box 10 is arranged in a power supply path between a power source such as a battery of a vehicle such as an electric vehicle or a hybrid vehicle and a load including a lamp or a motor. Hereinafter, the X direction in FIG. 1 will be described as forward, the Y direction as left, and the Z direction in FIG. 2 as upward.

As shown in FIGS. 2 and 3, in the vicinity of a device (not shown) mounted on a vehicle and performing a predetermined operation, for example, in order to generate a function related to the operation of the device or to protect the device. , A resin member 50 made of a plate-shaped synthetic resin is provided. The resin member 50 is fixed to the vehicle body in a shape (range) according to the purpose (function) of the internal device or the resin member itself. The resin member 50 is provided with a mounting portion 51 to which the electrical connection box 10 is mounted. The mounting portion 51 includes a receiving portion 52 made of synthetic resin, a fastening portion 59 for fastening with a screw BT as a fastening member, and a guide portion 60, as shown in FIG.

The receiving portion 52 is made of synthetic resin and is integrally formed with the resin member 50. As shown in FIG. 13, the receiving portion 52 is formed from a base portion 53 protruding on the surface of the resin member 50 and a front end portion of the base portion 53. An upright wall 55 that stands up upward and a locking wall 57 that projects rearward from the upper end of the upright wall 55 are provided, and the inside of the base 53, the upright wall 55, and the locking wall 57 is an electrical junction box 10 described later. It is said that the groove portion 58 into which the engaging portion 32 of the above enters.

On the upper surface of the base portion 53, a mounting portion 53B on which the engaging portion 32 can be mounted and an escape recess 53A that escapes so as not to come into contact with the engaging portion 32 are formed. The relief recess 53A extends in a groove shape in the left-right direction. The upper surface of the mounting portion 53B is arranged at a position higher than the bottom surface of the relief recess 53A, and is formed over the entire width of the base portion 53. A step portion is formed between the mounting portion 53B and the relief recess 53A. The locking wall 57 has a flat plate shape and is arranged on an XY plane, and the tip end (rear end) of the locking wall 57 is arranged in front of the front end of the mounting portion 53B.

As shown in FIG. 2, the fastening portion 59 has a columnar outer shape, and its axial direction protrudes in a direction orthogonal to the upper surface of the resin member 50. The height of the fastening portion 59 is higher than the height of the receiving portion 52 (the position of the upper end of the receiving portion 52), and when the electrical connection box 10 is arranged at the normal position (position in FIG. 2), electricity is generated. The bottom wall 23 of the connection box 10 is arranged parallel to the resin member 50 at a predetermined interval. A screw hole 59A to which a screw BT as a fastening member can be screwed is formed on the upper surface of the fastening portion 59 from above.

As shown in FIG. 3, the guide portion 60 has a columnar shape and is integrally formed with the resin member 50, and its axial direction is orthogonal to the upper surface of the resin member 50. The tip side of the guide portion 60 has a tapered shape. As shown in FIG. 4, the upper end 60A of the guide portion 60 is arranged at a position higher than the upper end of the fastening portion 59.

As shown in FIG. 6, the electrical connection box 10 includes a circuit board 11 to which the connector 13 is mounted and a box body 20 in which the circuit board 11 is housed. The circuit board 11 has, for example, a rectangular shape, and is a printed circuit board in which a conductive path made of copper foil or the like is formed on an insulating plate by a printed wiring technique. For example, electronic components are mounted on the lower surface of the circuit board 11. There is. The electronic component can be, for example, a FET (Field Effect Transistor), a coil, a capacitor, an IC (Integrated Circuit), or the like. The connector 13 includes a housing 14 made of synthetic resin and a connector terminal 15. A terminal fixing portion for fixing the connector terminal 15 is closed behind the square cylindrical hood portion in the housing 14 to which the mating connector can be fitted. The connector terminal 15 is made of copper, a copper alloy, or the like and is bent in a crank shape, and the rear end portion of the connector terminal 15 is soldered to a conductive path on the surface of the circuit board 11.

The box body 20 is made of synthetic resin, and as shown in FIG. 6, includes a square tubular accommodating member 21 in which the circuit board 11 is accommodated, and a cover 39 for covering the opening 22A of the accommodating member 21. The accommodating member 21 is provided in a flat square cylinder-shaped square cylinder portion 22, an extension portion 28 extending rearward of the square cylinder portion 22, and a lower side of the square cylinder portion 22, and is engaged with a receiving portion 52. It is provided with a mating engaging portion 32.

The side of the square tube portion 22 facing the resin member 50 is a flat plate-shaped bottom wall 23. A pair of left and right side wall portions 24 stand up from the bottom wall 23, and the upper ends of the pair of side wall portions 24 are connected by a ceiling wall 26. As shown in FIG. 2, the rear end portion of the square tube portion 22 is closed by the rear wall 27, and the front end portion is formed with an opening 22A from which the connector 13 is led out. The opening 22A has a rectangular shape through which the circuit board 11 to which the connector 13 is mounted can be inserted.

As shown in FIG. 6, a lock convex portion 25 projects outward from the front end portion of the outer surface of each side wall portion 24. The lock convex portion 25 has a shape that protrudes outward in a stepped shape and has a shape in which the protruding dimension becomes smaller in an inclined shape toward the front side.

As shown in FIGS. 2 and 3, the extending portion 28 has a rectangular flat plate-shaped portion 29 and a square tubular portion that stands up from the peripheral portion of the plate-shaped portion 29 and surrounds the region of the plate-shaped portion 29. It is provided with an extension wall 31 of the above. The plate-shaped portion 29 is provided on the rear end portion side of the bottom wall 23, and a plurality of circular insertion holes 29A and 29B are formed through. In the insertion holes 29A and 29B, the fastening hole 29A and the plurality of guide holes 29B are arranged in the left-right direction, and the guide holes 29B are arranged on both the left and right sides of the fastening hole 29A. The shaft portion of the screw BT is inserted into the fastening hole 29A, and the hole edge of the fastening hole 29A is screwed as the fastened portion 30 between the head of the screw BT and the fastening portion 59 on the vehicle side. One guide portion 60 arranged at a position corresponding to the vehicle type is inserted into one of the plurality of guide holes 29B to guide the moving direction when the electrical connection box 10 is attached.

As shown in FIGS. 2 and 12, the engaging portion 32 protrudes below the bottom wall 23 and supports between the bottom wall 23 and the mounting portion 53B, and below and supports the bottom wall 23. Two (s) partition walls 34 protruding in front of the wall 33 and arranged at intervals in the left-right direction, and a covering extending in the left-right direction extending in a direction orthogonal to the plate surfaces of the support wall 33 and the partition wall 34. The locking wall 36 is provided.

The support wall 33 has a rectangular flat plate shape, has a plate surface (YZ plane) orthogonal to the plate surface (XY plane) of the bottom wall 23, and is mounted on the mounting portion 53B and mounted on the bottom wall 23. The distance between the part 53B and the portion 53B is maintained. The two partition walls 34 are both flat and have a plate surface (YZ plane) orthogonal to the plate surface of the bottom wall 23, and the front side of the lower end portion of each partition wall 34 is cut with an inclined corner. It is said to be the notched portion 34A that was notched. The locked wall 36 has a flat plate shape extending in the left-right direction, and a pair of left and right ribs 37 extend in the front-rear direction on the upper surface 36A of the locked wall 36. Each rib 37 is formed in a mountain shape in cross section over the entire length in the front-rear direction of the locked wall 36.

The cover 39 is made of synthetic resin, and as shown in FIG. 6, a rectangular lead-out hole 39A from which the connector 13 is led out is formed through, and a pair of lock protrusions are formed at the end portion in the width direction. A pair of frame-shaped locked portions 40 that are locked to the 25 are provided. The locked portion 40 is flexible and deformable, and the cover 39 is restricted from being detached by locking the lock convex portion 25 to the hole edge of the locked hole 40A.

The assembly of the electric connection box 10 will be described.
Solder paste is applied to the land on the surface of the circuit board 11, and the connector 13 is mounted on the circuit board 11 by, for example, reflow soldering. Next, the circuit board 11 to which the connector 13 is mounted is inserted into the opening 22A of the box body 20 from the side opposite to the connector 13 side, and the entire circuit board 11 is inserted along the guide groove 24A (FIG. 6) on the inner surface of the box body 20. It is housed in the box body 20. Next, when the operator assembles the cover 39 to the box body 20 so that the connector 13 is led out from the lead-out hole 39A of the cover 39, the electrical connection box 10 is formed.

The attachment of the electric connection box 10 to the attachment portion 51 of the vehicle will be described.
As shown in FIGS. 7 and 9, the electrical connection box 10 moves from the connector 13 side to the receiving portion 52 side in an inclined posture so that the rear side is far from the resin member 50. Then, the locked wall 36 of the engaging portion 32 enters the groove portion 58 of the receiving portion 52, and as shown in FIG. 10, the lower end of the partition wall 34 abuts on the mounting portion 53B by the notch portion 34A and enters. It is arranged in the relief recess 53A without being restricted. Then, the partition wall 34 or the support wall 33 abuts on the receiving portion 52, and the rib 37 of the locked wall 36 abuts on the locking wall 57, so that the engaging portion 32 is in a front stop state and moves forward. Movement is restricted. Next, in this state, the electric connection box 10 is rotated clockwise with the receiving portion 52 as an axis. Then, as shown in FIGS. 3 and 4, the guide portion 60 protruding from the resin member 50 is inserted into the guide hole 29B of the box body 20 to guide the rotation direction of the electrical connection box 10, and FIG. 12 As shown in the above, the plate-shaped portion 29 in the extending portion 28 of the box body 20 is placed on the fastening portion 59. At this time, as shown in FIG. 13, the rib 37 of the locked wall 36 is sandwiched between the rib 37 and the locking wall 57, and the rib 37 and the locking wall 57 are in a state of elastic deformation or plastic deformation, and are locked. A reaction force is generated between the wall 57 and the locked wall 36. In this state, the shaft portion of the screw BT is passed through the fastening hole 29A of the plate-shaped portion 29 and the screw hole 59A of the fastening portion 59 and screwed, so that the box body 20 engages with the receiving portion 52 and the fastening portion 59. The electrical junction box 10 is fixed to the mounting portion 51 (FIG. 2).

According to this embodiment, the following actions and effects are exhibited.
It is a mounting structure of the electrical junction box 10 for fixing the electrical junction box 10 in which the circuit board 11 is housed in the box body 20 to the mounting portion 51 of the vehicle, and the mounting portion 51 is for mounting the electrical junction box 10. A resin receiving portion 52 that comes into contact with the electric junction box 10 and receives force from the electric junction box 10 during movement, and a fastening portion 59 that can be fastened to the box body 20 by a screw BT (fastening member). The bottom wall 23 on the mounting portion 51 side of the box body 20 is provided with a resin engaging portion 32 that can be engaged with the receiving portion 52 in a front-stopped state when the electrical connection box 10 is mounted. It includes a fastened portion 30 that is fixed to the fastened portion 59 by fastening the screw BT.

According to the present embodiment, the engaging portion 32 of the electrical connection box 10 engages with the receiving portion 52 in a front-stopped state when the electrical connection box 10 is attached, and therefore the engaged portion 32 is engaged with the fastening member. It becomes possible to easily perform the positioning when fastening the 30 to the fastening portion 59. Here, since the receiving portion 52 and the engaging portion 32 used for mounting the electrical connection box 10 are both made of synthetic resin, the shape can be easily processed as compared with the metal bracket, and a plurality of parts can be processed. It becomes possible to make the shapes of the receiving portion 52 and the engaging portion 32 common for the vehicle type of the above.

Further, in a state where the fastened portion 30 and the fastened portion 59 are not fastened by the screw BT, the front end portion of the engaging portion 32 is engaged with the receiving portion 52, and the front end portion side of the engaging portion 32 is used as a shaft. The electrical connection box 10 can be rotated, and a guide portion 60 for guiding the rotation direction of the electrical connection box 10 is provided on at least one of the mounting portion 51 and the bottom wall 23.
By doing so, the guide unit 60 can guide the moving direction of the electric connection box 10 when the electric connection box 10 is attached, so that the workability of the attachment of the electric connection box 10 can be improved.

Further, on the contact surface between the groove wall of the groove portion 58 and the engaging portion 32, between the groove wall and the engaging portion 32 in a state where the fastened portion 30 is arranged at a position where it can be fastened to the fastening portion 59. It is provided with a rib 37 sandwiched between the two.
By doing so, the position of the electrical connection box 10 can be maintained by the reaction force generated between the groove wall of the groove portion 58 and the engaging portion 32 when the rib 37 is crushed.

The engaging portion 32 can enter the groove 58 in a posture in which the electrical connection box 10 is tilted with respect to the receiving portion 52.
By doing so, the workability of attaching the electric connection box 10 can be improved.

The connector 13 mounted on the circuit board 11 and exposed from the opening of the box body 20 is provided, the engaging portion 32 is arranged on the connector 13 side of the bottom wall 23, and the fastened portion 30 is on the connector 13 side of the bottom wall 23. It is located on the opposite side of the.
It is preferable that the connector 13 is arranged on the lower side so that the vehicle is not affected by water droplets or the like. According to the above embodiment, when such a connector 13 is arranged on the lower side, the fastened portion 30 is arranged on the upper side. Therefore, the work of fastening the fastened portion 30 with the screw BT is performed. It is possible to improve the sex.

<Other embodiments>
The techniques described herein are not limited to the embodiments described above and in the drawings, and for example, the following embodiments are also included in the technical scope of the techniques described herein.
(1) The box body 20 is entirely made of synthetic resin, but the present invention is not limited to this. For example, in the box body, the engaging portion 32 may be made of synthetic resin, and the square tube portion 22 or the like may be made of metal.

(2) The electrical connection box 10 is configured to be mounted on the vehicle with the connector 13 facing downward, but the present invention is not limited to this, and the electrical junction box 10 may be mounted on the vehicle in another orientation.

(3) The plate-shaped locked wall 36 of the engaging portion 32 is inserted into the groove portion 58 of the receiving portion 52, but the present invention is not limited to this. For example, a groove is provided in the engaging portion of the electrical junction box, a plate-shaped locking wall is provided in the receiving portion of the mounting portion, and the locking wall on the vehicle side is inserted into the groove portion of the engaging portion on the electrical junction box side. It may be configured to engage.

(4) Although the mounting portion 51 is configured to provide the guide portion 60, it may be configured not to provide the guide portion 60.
(5) The locked wall 36 is configured to include the rib 37, but may be configured not to include the rib 37.

10: Electrical connection box 11: Circuit board 13: Connector 20: Box body 28: Extensions 29A, 29B: Insertion holes 30: Fastened parts 32: Engagement parts 36: Locked walls 37: Ribs 50: Resin member 51: Mounting part 52: Receiving part 57: Locking wall 58: Groove part 59: Fastening part 60: Guide part BT: Screw (fastening member)

Claims (6)

It is a mounting structure of an electrical junction box for fixing an electrical junction box in which a circuit board is housed in a box body to a vehicle mounting portion.
The mounting portion can be fastened to the box body by a fastening member with a resin receiving portion that abuts on the electrical connection box and receives force from the electrical connection box when moving when mounting the electrical connection box. With a fastening part,
The bottom wall of the box body on the mounting portion side is fastened to the resin engaging portion that can be engaged with the receiving portion when the electrical connection box is mounted, and the fastening member is fastened. With a fastened part that is fixed to the part ,
The engaging portion is plate-shaped and has a plate shape.
An electrical junction box mounting structure in which a groove into which the engaging portion can enter is formed in the receiving portion . In a state where the fastened portion and the fastened portion are not fastened by the fastening member, the front end portion of the engaging portion is engaged with the receiving portion, and the front end portion side of the engaging portion is used as an axis. The electrical junction box can be rotated,
The mounting structure for an electrical connection box according to claim 1, wherein a guide portion for guiding the rotation direction of the electrical connection box is provided on at least one of the mounting portion and the bottom wall. The mounting structure for an electrical junction box according to claim 2, wherein the fastened portion is formed with an insertion hole, and the guide portion is capable of being inserted into the insertion hole. On the contact surface between the groove wall of the groove portion and the engaging portion, between the groove wall and the engaging portion in a state where the fastened portion is arranged at a position where the fastening portion can be fastened to the fastening portion. The mounting structure for an electrical junction box according to any one of claims 1 to 3, further comprising a rib to be sandwiched. The mounting of the electrical connection box according to any one of claims 1 to 4 , wherein the engaging portion can enter the groove portion in an inclined posture with respect to the receiving portion. Construction. It is mounted on the circuit board and has a connector exposed from the opening of the box body.
One of claims 1 to 5 , wherein the engaging portion is arranged on the connector side of the bottom wall, and the fastened portion is arranged on the side of the bottom wall opposite to the connector side. The mounting structure of the electrical junction box described in the section.

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