JP2554625Y2 - Electrical junction box mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an electric junction box used for wiring in a vehicle.

[0002]

2. Description of the Related Art FIG. 2 shows a general structure of an electric junction box for an automobile. The electrical connection box 11 has a fuse
Components such as 13 and relay 14 are accommodated, and input / output wires 15 are connected via busbars and connectors to form a predetermined circuit in these components. The upper cover 16 is provided on the component mounting side of the case body 12 for waterproofing and dustproofing.
Is attached, and a lower cover 17 is attached to the lead-out side of the electric wire 15.

[0003]

[Problems to be Solved by the Invention] In the electric junction box having such a configuration, with the increase of automotive electric components in recent years,
The following problems have occurred. That is, the electrical junction box
Due to the space of the installation location, its size is limited, and as the number of automotive electrical components increases under these restrictions, the number of heat-generating components such as fuses and relays increases, and the density of connection circuits in the electrical junction box also increases. Become.

[0004] As a result, the number of heat-generating parts such as heat-generating parts and terminal connection parts increases, and the temperature inside the electric connection box increases. This impairs the functions of various parts, melts and thermally deforms the case body and the cover. And other problems. SUMMARY OF THE INVENTION An object of the present invention is to provide an electric junction box mounting structure that can suppress a rise in temperature in an electric junction box in view of the above problems.

[0005]

When the electric junction box is mounted at a predetermined position in the automobile, it is necessary to connect the ground circuit conductor of the electric junction box to the body of the automobile. Conventionally, this connection is made by a bracket. Was. The present invention is intended to suppress the temperature rise in the electric connection box by giving a heat radiation effect to this connection route. That is, in the present invention , the heat absorbing portion of the heat pipe is electrically connected to the earth circuit conductor of the electric connection box.
Connected to the body of the car,
Are electrically connected .

[0006]

The function of the heat pipe in the present invention is to efficiently transmit the heat trapped in the electric junction box to the body side and to dissipate heat, and as a connection conductor for earthing the earth circuit conductor of the electric junction box to the body. Function.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In the figure, 11 is an electric junction box, 21 is a body of an automobile, and 22 is a heat pipe.

The electric connection box 11 has the same structure as that of the related art, and includes a case body 12 for mounting components such as relays (not shown), an upper cover (not shown), a lower cover 17, a bus bar 23 forming a connection circuit, and a ground circuit. And an insulating plate 25 for interlayer insulation. The bus bar 24 for the ground circuit is a ground terminal 24 protruding outside the case body 12.
a.

As is well known, the heat pipe 22 is formed by sealing a working fluid under reduced pressure in a metal tube whose both ends are sealed. The working fluid inside the heat pipe 22 absorbs heat on the heat absorbing part 27 side and evaporates. The heat is transferred from one end to the other end with extremely high efficiency by repeating the process of moving to the lower heat dissipating part 28 side, radiating heat there and liquefying, then traveling down the inner surface of the tube and returning to the heat absorbing part 27 again. It has the function to do.

The heat pipe 22 has a heat absorbing side terminal 29 at one end.
However, the heat radiation side terminal 30 is integrally formed at the other end, and the heat absorption side terminal 29 is the ground terminal 24a of the ground circuit bus bar 24.
The heat radiation side terminals 30 are fixed to the body 21 by screws (not shown).

Accordingly, the ground circuit bus bar 24 is electrically connected to the body 21 by the heat pipe 22. The temperature of the earth circuit bus bar 24 rises due to the heat generated in the electric connection box 11, and the heat is transported to the body 21 side by the heat pipe 22 with high efficiency and is radiated there. Is suppressed, and as a result, the temperature inside the electric connection box 11 is suppressed.

[0012]

As described above, according to the present invention, the heat inside the electric connection box can be efficiently released to the body side by the heat pipe and the temperature rise inside the electric connection box can be suppressed.
It is possible to prevent the functional failure of various parts due to the temperature rise, the erosion and deformation of the case body and the like, and the heat pipe has the effect of performing a double connection with the earth circuit conductor of the electric connection box and the body.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an electric junction box mounting structure according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a conventional electric junction box.

[Explanation of symbols]

11: Electrical connection box 12: Case body 17: Lower cover
21: Car body 22: Heat pipe 24: Bus bar for ground circuit (ground circuit conductor) 24a: Ground terminal 29: Heat absorbing terminal 30: Radiating terminal

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-30414 (JP, A) JP-A-2-17818 (JP, A) Full-open sho 57-114748 (JP, U) Real-open sho 63- 113765 (JP, U) Fully open 1986-612731 (JP, U) Fully open 1-2000017 (JP, U) Fully open 3-3-1919 (JP, U) Fully open 56-48361 (JP, U) Japanese Utility Model Showa 60-174296 (JP, U) Japanese Utility Model Showa 61-71846 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A heat pipe is connected to an earth circuit conductor of an electric connection box.
Electrically connect the heat absorbing part of the
An electric junction box mounting structure, wherein a heat radiating portion of a heat pipe is electrically connected.