JP5114240B2 - In-vehicle electrical junction box - Google Patents

Description

  The present invention relates to an on-vehicle electrical junction box. Specifically, a wire harness connected to an internal circuit of the relay box is accommodated in the relay box, and the wire harness is pulled out to be connected to the relay unit by a connector. The present invention relates to an electrical connection box that houses and assembles a relay unit in a component housing portion provided in the relay box later.

  In an electrical junction box composed of a relay box mounted on a vehicle, as shown in FIG. 8A, the wire harness W / H for connecting the internal circuit of the relay box 1 and the relay unit 2 is It is placed on the bottom wall 4a of the lower cover 4 below the receiving unit 1a for the relay unit. In the vehicle assembly plant, the wire harness W / H is pulled out from the relay box 1, the connector 3 at the tip of the wire harness W / H is connected to the relay unit 2, and then the relay unit as shown in FIG. 8B. 2 may be accommodated in the accommodating portion 1a as a retrofit.

  In the relay box 1, when the wire harness W / H is pulled out from the bottom wall 4a of the lower cover 4 below the housing portion 1a, the wire harness W / H falls on the bottom wall 4a of the lower cover below the housing portion 1a. Since the connector 3 is housed in a state, it is difficult to grasp the connector 3, and when the connector 3 is entangled with the electric wire, it is caught and is difficult to take out. Moreover, even if it takes out, there may be a case where the length of the electric wire becomes insufficient due to the entanglement crossing between the electric wires, and there is a problem in that workability is poor.

As a holding structure for an electric wire drawn out from an electric junction box, the present applicant provides an electric wire holding structure shown in FIG. 9 in Japanese Patent Laid-Open No. 2001-45635 (Patent Document 1).
In the electric wire holding structure, a fixed arm 6 and a movable arm 7 project from the outer surface of the lower case 5 to provide a wire harness insertion space 8, and a wire harness insertion port 8 a is provided between the ends of the arms 6 and 7. Provided, the wire harness W / H is pushed from the insertion port 8a, and the wire harness W / H is supported in the insertion space 8 with three points (P1, P2, P3) supported without rattling when the vehicle is running.

  As described above, the wire harness support structure for the electrical junction box disclosed in Patent Document 1 is used in a state in which the wire harness is supported at three points in the insertion space 8 and along the outer surface of the electrical junction box. It is. Therefore, it is not housed in the relay box until it is connected to the relay unit, and pulled out of the relay box and connected to the relay unit when the vehicle is assembled. Therefore, the wire harness can be easily detached from the insertion space 8. Therefore, it cannot be applied when pulling out.

JP 2001-45635 A

  The present invention has been made in view of the above problems. A wiring harness for connection with a retrofitted electrical component such as a relay unit is accommodated in an electrical connection box such as a relay box, and the wire harness is pulled out to be electrically connected. It is an object of the present invention to make it possible to easily pull out a wire harness in an electrical junction box that accommodates the electrical component in a component accommodating portion after connecting the component and the connector.

In order to solve the above problems, the present invention provides a component housing part for a retrofitted electrical component on one side of a case body of an electrical junction box, and the component housing part has an internal circuit of the case body and the retrofitted electrical component. The wire harness is accommodated, the wire harness is pulled out before inserting the electrical component, and the connector attached to the end of the wire harness is connected to the electrical component, and then the electrical component is inserted into the component accommodating portion. In the in-vehicle electrical junction box
Provided is a wire harness temporary holding groove formed of an arc-shaped groove formed by cutting out at an upper end portion of one side wall of the component housing portion , and an insertion side opening of the wire harness temporary holding groove is formed from an outer diameter of the wire harness. The wire harness can be inserted by being pushed in from the insertion side opening, and the wire harness held in the wire harness temporary holding groove can be pulled from the insertion side opening to be removed,
A plurality of connectors are connected to the ends of the wire group of the wire harness, and the wire groups connected to the plurality of connectors are taped and bundled at a lower portion of the wire harness temporary holding groove, A group of wires connected to one connector or one wire is temporarily held in the wire harness temporary holding groove so as to be detachable so that all the connectors can be positioned above the wire harness temporary holding groove. An electrical junction box for in-vehicle use is provided.

  As described above, in the present invention, the wire harness drawn out on the bottom wall of the lower cover below the component housing portion provided in the case main body is not only placed in a state of being dropped on the bottom wall of the lower cover. The connector connection side is pulled out along the side wall of the component housing portion and is held by the wire harness temporary holding groove so that the connector is always positioned above the component housing portion of the case body. Therefore, when the wire harness is pulled out and connected to the electrical component and the connector, it is not necessary to pull out the connector from the bottom wall side of the lower cover, and it is possible to prevent the connector from entering the bottom of the lower cover and becoming difficult to find. In addition, the wire harness can be prevented from being entangled and caught, and there is no shortage of the wire length when the wire harness is pulled out, and the workability of assembling the electric junction box to the vehicle can be improved.

  The wire harness temporary holding groove is an arc-shaped groove cut out at the upper end of the side wall of the component housing portion, and the arc opens the insertion side opening to be smaller than the outer diameter of the wire harness and opens the wire harness. The wire harness held in the wire harness temporary holding groove can be pulled out from the opening and removed.

That is, since the wire harness side can be deformed by its elasticity, the wire harness is temporarily inserted into and pulled out from the wire harness temporary holding groove by using this elastic deformation. The harness can be temporarily held without being detached from the opening. Therefore, the temporary holding groove only needs to be an arc-shaped groove as described above, and it is not necessary to provide a movable arm and be elastically deformable as in Patent Document 1, and it is easy to temporarily hold the wire harness. A mechanism can be provided.
Further, since the wire harness temporary holding groove is formed by notching the upper end of the side wall of the component housing portion, the volume of the component housing portion does not need to be increased from the size that can accommodate the electrical component. The temporary holding state of the wire harness can be stabilized.

  By providing necks slightly projecting in an arc shape on both sides of the opening of the wire harness temporary holding groove, it is possible to reliably prevent the wire harness from being removed after insertion, and to force the wire harness even during removal. It can be pulled out without any problems.

A plurality of connectors are connected to the ends of the wire group of the wire harness, and the wire groups connected to the plurality of connectors are taped and bundled at a lower portion of the wire harness temporary holding groove, provisionally holding the one connector wire group or one wire which is connected to the above wire harness temporary holding groove, and said all connectors can Rukoto is positioned above the wire harness temporary holding groove configuration, the temporary The electrical component can be connected at the holding position.

When temporarily holding the one wire or multiple wires are connected to one connector of the plurality of connectors attached to the wire group of the wire harness drawn out to the outside temporary holding groove, the wire group of the connector and the tape The connector connected to the wire group wound and bundled can also be held above the component housing portion.
Thus, it is not necessary to hold all the electric wires constituting the wire harness through the temporary holding groove, and hold one electric wire of the wire group, preferably a thick wire, through the temporary holding groove. Just leave it. Therefore, the wire harness temporary holding groove can be reduced, and it is only necessary to form a small temporary holding groove on the upper wall of the side wall of the component housing portion, and it is necessary to newly provide a space for providing the wire harness temporary holding mechanism. There is no.

  The electrical junction box of the present invention is composed of, for example, a relay box, and the electrical component housed in the relay box is composed of a relay unit.

As described above, according to the present invention, by inserting the root position of the connector connection portion of the wire harness into the wire harness temporary holding groove formed at the upper end of the side wall of the component housing portion, the connector is always above the component housing portion. Can be positioned. Therefore, there is no need to search for a connector when pulling out the wire harness, and it is possible to prevent the occurrence of a shortage of the wire length by preventing the wire from becoming entangled or caught. Connector connection workability can be improved.
In addition, since the wire harness temporary holding groove is inserted / held / removed using the elastic deformability of the wire harness, there is no need for a complicated structure or deformability on the side of the temporary holding groove, thereby reducing the manufacturing cost. Can do.

  Furthermore, a group of wires or one wire connected to one of the plurality of connectors is temporarily held in a wire harness temporary holding groove, and the other wires are temporarily held by bundling the temporarily held wires with a tape. The groove can be minimized, and the space saving and miniaturization of the electrical junction box can be measured.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 6 show an in-vehicle relay box 10 of the present invention.
As shown in FIGS. 1 to 3, the relay box 10 includes a case main body 11 containing an internal circuit such as a bus bar (not shown), a lower cover 12 attached to the case main body 11, and an upper cover (not shown). It has. After the lower cover 12 is locked to the case main body 11, the upper cover is put on the case main body 11 to be locked.

The case body 11 has a plurality of relays 15 and fuses 16 mounted on the upper surface thereof, and is connected to an internal circuit composed of a bus bar (not shown) housed in the case body 11.
Further, as shown in FIG. 1, a component accommodating portion 21 that accommodates the relay unit 13 retrofitted is provided on one side of the case main body 11 so as to be surrounded by a peripheral wall.
A wire harness 19 that connects the internal circuit and the relay unit 13 is drawn out and housed on the bottom wall 12 a of the lower cover 12 below the component housing portion 21.
A connector 29 (29A to 29C) is connected to the end of the wire harness 19, and after the wire harness 19 is pulled out and connected to the relay unit 13, the relay unit 13 indicated by cross diagonal lines in FIG. It is assembled in the component housing part 21 as a retrofit.

  As described above, the component housing portion 21 is formed from a vertically long vertical opening space surrounded by the inner wall 21a, the outer wall 21d, and the left and right side walls 21b and 21c that are continuous with the inner and outer walls 21a and 21d. The bottom wall 12a of the lower cover 12 is located below the lower opening.

  A wire harness temporary holding groove (hereinafter abbreviated as a temporary holding groove) 23 is provided in the upper end of the right side wall 21b in the vertical direction surrounding the component housing portion 21 so as to penetrate in the vertical direction. The temporary holding groove 23 has an arc shape in a plan view, and an insertion side opening 26 is opened laterally. The dimension L1 of the insertion opening 26 is smaller than the diameter L2 of the temporary holding groove 23.

  As shown in FIG. 4B, the temporary holding groove 23 has a diameter L2 that can fit and hold the single thickest electric wire 50 in the wire harness 19A connected to the connector 29A. Yes. The dimension L1 of the insertion side opening 26 is set to a dimension that allows the insulating covering portion of the thick wire 50 to be bent and inserted.

  As described above, the wire harness 19 connected to the internal circuit of the case body 11 includes the three wire harnesses 19A to 19C connected to the three connectors 29A, 29B, and 29C. The wire harnesses 19A to 19C are connected to the temporary harnesses 19A to 19C. The tape 30 is wound and bundled below the position temporarily held by the holding groove 23.

  As shown in FIG. 2, the wire harnesses 19 </ b> A to 19 </ b> C pulled out from the lower side of the inner wall 21 a of the case body 11 are pulled out on the bottom wall 12 a of the lower cover 12 below the component housing portion 21 and folded on the bottom wall 12 a. The wire harnesses 19A to 19C on the connection side with the connectors 29A to 29C are pulled up along the inner surface of the right side wall 21b, and the thick wire 50 is pushed into the temporary holding groove 23 from the insertion opening 26. And temporarily hold it so that it can be detached.

  As described above, when the thick wire 50 is inserted into the temporary holding groove 23 and temporarily held, the connector 29A connected to the thick wire 50 is connected to the temporary holding groove 23 as shown in FIGS. It is held upward and is located above the component housing part 21 of the case body 11. In addition, the wire harness 19 </ b> A connected to the connector 29 </ b> A and the other connectors 29 </ b> B and 29 </ b> C bound by the tape 30 are also lifted above the component housing portion 21 of the case body 11. And the electric wire group by the side of the connector connection of wire harness 19A-19C connected to these connectors 29A-29C will be temporarily hold | maintained in the position along the right side wall 21 of the accommodating part 21. FIG.

  In the vehicle assembly process, the relay unit 13 pulls out the wire harnesses 19A to 19C from the relay box 10 and connects them to the connectors 29A to 29C of the wire harnesses 19A to 19C. Inserted and assembled. In a state in which the relay unit 13 is inserted and assembled in the component housing portion 21, the connectors 29 </ b> A to 29 </ b> C of the wire harness 19 are connected to the connectors on the lower end surface of the relay unit 13, and the lower portion of the component housing portion 21 and the case body 11. The lower cover 12 is housed in the lower cover.

In the operation process of connecting the wire harnesses 19A to 19C to the relay unit 13, the connectors 29A to 29C of the terminals of the wire harnesses 19A to 19C are located above the component housing portion 21 of the case main body 11, so that these connectors 29A to 29C can be easily gripped. That is, there is no need to search for and pull out a connector that has fallen on the bottom wall of the lower cover.
In addition, if the thick wire 50 of the wire harness 19A is pulled to the side that comes out of the temporary holding groove 23 in the gripped state, the temporary holding state is canceled and the wire harnesses 19A to 19B can be easily pulled out from the relay box 10. Can be.

  As described above, in the relay box 10 of the present invention, the wire harness 19 is not only placed on the bottom wall 12a of the lower cover 12 below the component housing portion 21 and stored, but also connected to the connectors 29A to 29C. The group is pulled out along the side wall 21 b of the component housing portion 21, the connectors 29 </ b> A to 29 </ b> C are positioned above the temporary holding groove 23, and the thick wire 50 in the wire group of the wire harness 19 is pushed into the temporary holding groove 23. Since it is held, the three connectors 29 </ b> A to 29 </ b> C of the wire harness 19 can be temporarily held in a state of being pulled out to the upper part of the component housing portion 21 of the case body 11.

  As described above, since the connectors 29A to 29C are temporarily held on the upper portions of the case main body 11 and the lower cover 12, the operator puts his hand on the bottom wall side of the lower cover 12 below the component housing portion 21 and searches for the connector. It does not take time and effort. In addition, the wire group of the wire harness 19 accommodated in a folded state on the bottom wall 12a of the lower cover 12 has the connection side with the connectors 29A to 29C drawn upward, so that the wires are not entangled or caught. The connection workability with the relay unit 13 can be improved.

Further, since the thick electric wire 50 held in the temporary holding groove 23 can compress the insulating resin coating layer, the temporary holding groove 23 can be easily pushed through the insertion side opening 26 having a width L1 smaller than the outer diameter of the thick electric wire 50. Can be inserted in. And after insertion, although it does not fall off by elastic restoration of the insulating coating layer of the thick wire 50, it can be temporarily held in a detachable state.
When the thick wire 50 is detached from the temporary holding groove 23 and the wire harness 19 is pulled outward, the thick wire 50 is easily detached without being damaged by pulling the thick wire 50 from the insertion side opening 26. be able to.

Furthermore, by making the temporary holding groove 23 into the shape, the temporary holding groove 23 does not need to be given elastic force to be deformed, and can be easily provided in the case body 11 by integral molding.
Furthermore, since the temporary holding groove 23 is cut out from the inner surface side of the side wall 21b, an external force is hardly applied to the temporary holding groove 23, and the temporary holding state of the wire harness 19 can be stabilized.

  Even when a plurality of connectors 29A to 29C are connected to the wire harness 19, only one electric wire connected to one connector 29A is temporarily held in the temporary holding groove 23, and the other electric wire groups 19B and 19C are Since the tape is wound around the electric wire group 19A below the temporary holding groove 23, all the connectors 29A to 29C can be positioned above the temporary holding groove 23, and the size of the temporary holding groove 23 can be reduced. By providing the wire harness temporary holding mechanism, the relay box 10 is not enlarged.

  The present invention is not limited to the above embodiment, and the electric wire inserted and held in the wire harness temporary holding groove 23 is not a single thick wire, but a plurality of wires connected to one connector 29A as shown in FIG. An electric wire may be inserted and held. In this case, the size of the wire harness temporary holding groove 23 is set to the outer diameter of the plurality of electric wire groups. Moreover, the opening of the wire harness temporary holding groove may open upward or downward.

It is a perspective view of the relay box which concerns on embodiment of this invention. It is a perspective view which shows the state which connected the wire harness to the internal circuit of the relay box of FIG. It is a top view of the state which attached the relay unit to the relay box. The wire harness temporary holding groove | channel is shown, (A) is an expansion perspective view, (B) is a schematic plan view which shows the state at the time of the electric wire group insertion to a wire harness temporary holding groove | channel. It is explanatory sectional drawing which shows the wire harness of the components accommodating part before attaching a relay unit. It is a principal part expansion perspective view which shows the accommodation state of a wire harness. (A) and (B) are drawings which show a modification. It is a figure which shows the prior art example of a relay block. It is drawing which shows the prior art example of an electric wire holding structure.

Explanation of symbols

10 Relay box (electrical connection box)
11 Case body 12 Lower cover 13 Relay unit (electrical part)
21 Component housing part 19 (19A-19C) Wire harness 29A-29C Connector 23 Wire harness temporary holding groove

Claims (2)

A component housing portion for a retrofitted electrical component is provided on one side of the case body of the electrical junction box, and a wire harness that connects the internal circuit of the case body and the retrofitted electrical component is housed in the component housing portion, and the electrical component In the in-vehicle electrical connection box for inserting the electrical component into the component housing portion after pulling out the wire harness before insertion of the connector and connecting the connector attached to the terminal of the wire harness with the electrical component,
Provided is a wire harness temporary holding groove formed of an arc-shaped groove formed by cutting out at an upper end portion of one side wall of the component housing portion , and an insertion side opening of the wire harness temporary holding groove is formed from an outer diameter of the wire harness. The wire harness can be inserted by being pushed in from the insertion side opening, and the wire harness held in the wire harness temporary holding groove can be pulled from the insertion side opening to be removed,
A plurality of connectors are connected to the ends of the wire group of the wire harness, and the wire groups connected to the plurality of connectors are taped and bundled at a lower portion of the wire harness temporary holding groove, A group of wires connected to one connector or one wire is temporarily held in the wire harness temporary holding groove so as to be detachable so that all the connectors can be positioned above the wire harness temporary holding groove. In-vehicle electrical junction box. The in- vehicle electrical junction box according to claim 1, wherein the electrical junction box is a relay box, and the electrical component is a relay unit .

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