JPH07245849A - Electronic connection box - Google Patents

Abstract

PURPOSE:To radiate the heat of a heating electric part so as to prevent the occurrence of a partial high-temperature part by arranging an elastic heat radiating part in contact with the heating electric heating part. CONSTITUTION:An electric box is constituted by accommodating heating electric parts 3 (relay, transformer, etc.) in a case 1, together with other scarcely heating electric parts. A heat radiating member 11, which is excellent in heat conductivity and elastic and has heat radiation fins, is interposed between the heating electric parts 3. For the heat radiating part 11, a material where inorganic powder fillers are mixed in large quantity to silicon rubber is used, and the length L is made larger than the contact face with the heating part 3, and the thickness D in width direction is set a little smaller than the interval between heating parts for the sake of heating fins, and it is press-fit between the heat radiation members 3. Hereby, the calorific value generated by the heating parts 3 is radiated efficiently, and the occurrence of partial high- temperature part is prevented, and parts are mounted in high density.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art As shown in FIG. 4, an electric junction box for an automobile accommodates a fuse 2, a relay 3 and other electric parts in a case 1, and these parts are used to form a predetermined circuit. The output electric wire 4 is connected directly or via a bus bar or a connector. In addition, the upper cover 5 is usually mounted on the component mounting side for waterproof and dustproof,
Further, a lower cover 6 is attached to the pull-out side of the electric wire 4 if necessary. The lower cover 6 is provided with an outlet 7 for the electric wire 4.

[0003]

In the above-mentioned electric junction box, the following problems have occurred with the increase in the number of electric components of automobiles in recent years. That is, the size of the electric connection box is limited due to the space of the installation place, and within that restriction, if the number of electric components of the vehicle increases, the number of heat-generating components such as fuses and relays increases, and the electric connection box increases. The density of the connection circuits inside is also high. In particular, the fusible part of the fuse and the coil part of the relay generate a large amount of heat. For this reason, not only the number of heat sources such as the heat-generating components and the terminal connecting portions increase, but also the amount of heat generation increases. As a result, there are problems that local overheating occurs to cause melting damage or deformation of the case body or the like, or heat is trapped inside the case, impairing the function of the fuse or relay.

[0004]

SUMMARY OF THE INVENTION The present invention provides an electric connection box which solves the above problems, and has elasticity in an electric connection box in which electric parts including heat generating electric parts are housed in a case. The heat dissipating component has a heat dissipating electric component and is arranged in contact with the heat generating electric component.

[0005]

Since the above-mentioned heat dissipation component has elasticity, the elasticity can be utilized to easily dispose the heat dissipation component between the high-density mounted heat-generating electric component and another electric component or the case wall. Can be installed. Further, the heat of the heat-generating electric component is conducted to the other electric component or the case wall through the heat radiating component and diffused, and at the same time transmitted to the surrounding atmosphere and diffused.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a partial perspective view of an embodiment of an electrical junction box according to the present invention. Reference numerals in the figure are the same as those in FIG. 4 used in the description of the conventional technique, and 11 is a heat dissipation component. The heat dissipation component 11 is formed of a resin material having good thermal conductivity and elasticity, and has a comb-like fin shape. The heat dissipation component 11 is a heat generating electrical component 2
Inserted in the space between the relays 3 by utilizing its elasticity,
The thickness D of the heat dissipation component 11
Is slightly larger than the interval between the relays 3 and 3.
In addition, the length L of the surface of the heat dissipation component 11 facing the relay 3
Is larger than the length of the surface of the relay 3. By doing so, the heat generated from the two relays 3 is generated by the heat dissipation component 11
This radiates heat to the surrounding space, preventing the generation of local high-temperature parts in the electrical junction box. Here, as the resin material having good thermal conductivity and elasticity, for example, silicone rubber in which a large amount of inorganic powder filler is filled is used.

FIG. 2 is a partial perspective view of another embodiment.
In the present embodiment, the heat dissipation component 12 is a thin plate made of metal (copper, aluminum, stainless steel, etc.) processed into a corrugated shape to form a ring, and has thermal conductivity and elasticity. This heat dissipation component 12 is bent at a right angle so that it contacts two surfaces of one relay 3 and one surface of the other relay 3 and is elastic in the gaps between the relays 3 and 3 and between the relay 3 and the case 1. It is inserted and retained by utilizing sex. Also in this embodiment, the thickness of the heat dissipation component 12 is set to be slightly larger than the width of the gap to be inserted, and the length thereof is longer than the length of the two surfaces of the relay 3 in contact therewith. The heat dissipation component 12 made of metal is not limited to the above embodiment, and may be a thin plate having a hollow structure.

FIG. 3 is a partial perspective view of still another embodiment. In this embodiment, the heat dissipation component 13 is composed of a mounting portion 13a having a hollow portion having good thermal conductivity and elasticity and a heat dissipation fin 13b. The heat dissipation component 13 is
The relay 3 is mounted by covering the mounting portion 13a. 14 is a lock claw attached to the mounting portion 13a, and 15 is a case 1
Lock hole provided on the base surface of the lock claw 14
Is inserted into the lock hole 15 to fix the heat dissipation component 13. The surface shape of the mounting portion 13a is not limited to be flat, and may be corrugated or the like. In this embodiment, the heat dissipation component 13 can be mounted only on a specific heat generating component.

[0009]

As described above, according to the present invention, in an electric connection box having an electric component including a heat generating electric component housed in a case, a heat radiating component having elasticity is brought into contact with the heat generating electric component. Since the heat dissipating components are arranged in a narrow space in the densely packed electrical junction box, the heat dissipating components can be easily mounted by using elasticity, and the heat of the heat generating electrical components can be diffused to locally There is an excellent effect that it is possible to prevent the generation of a typical high temperature portion.

[Brief description of drawings]

FIG. 1 is a partial perspective view of an embodiment of an electrical junction box according to the present invention.

FIG. 2 is a partial perspective view of another embodiment.

FIG. 3 is a partial perspective view of still another embodiment.

FIG. 4 is an exploded perspective view of an electric junction box.

[Explanation of symbols]

 1 Case 2 Fuse 3 Relay 4 Wire 5 Upper cover 6 Lower cover 7 Drawouts 11, 12, 13 Heat dissipation part 13a Mounting part 13b Heat dissipation fin 14 Lock claw 15 Lock hole

Claims (1)

[Claims] 1. An electric connection box comprising an electric component including a heat generating electric component housed in a case, wherein an elastic heat dissipating component is arranged in contact with the heat generating electric component. box.