JPH0541332U - Electric connection box for automobile - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electric connection box for an automobile, which has a waterproof and dustproof function and also has a function of radiating the hot air to the outside to radiate the heat. [Structure] An automobile electric vehicle including an outer frame housing 1 and lids 15 and 6, in which electric components such as a fuse 3 and a relay 2 are housed in the outer frame housing 1 and lids 15 and 6. In the connection box, the outer frame housing 1 and the lids 15 and 6 or the outer frame housing 1
One of the lids 15 and 6 is at least partially formed of a gas-permeable and waterproof material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric junction box used for wiring in a car.

[0002]

[Prior art]

 As shown in FIG. 2, an electric junction box for an automobile has electrical components such as a relay 2 and a fuse 3 mounted in an outer frame housing 1 and is packaged to form a predetermined circuit in these components. Connect the output electric wire 4 directly or via a bus bar or connector, attach the upper lid 5 to the component mounting surface for waterproof and dustproof, and attach the lower lid 6 to the electric wire 4 drawing surface side. It was done. The lower lid 6 is provided with an electric wire outlet 7 for drawing the electric wire 4 out of the connection box. Molded resins such as polypropylene are generally used for these constituent members.

[0003]

[Problems to be solved by the device]

 In the electrical junction box configured as described above, the following problems have arisen with the increase in automobile electrical components in recent years. In other words, the size of the electrical junction box is limited due to the space of the installation site, and if the number of electrical components for automobiles increases under such restrictions, the number of heat-generating components such as fuses and relays increases, and the electrical junction box also increases. The density of the internal connection circuits also increases. In particular, the fusible part of the fuse and the coil part of the relay generate extremely large amounts of heat. For this reason, not only the number of heat sources such as heat-generating components and terminal connection parts increases, but also the amount of heat generated increases. As a result, there was a problem that local overheating occurred and hot air was trapped inside the sealed junction box, impairing the functions of fuses and relays.

[0004]

[Means and actions for solving the problem]

 The present invention provides an electric junction box for an automobile that solves the above-mentioned problems. It is composed of an outer casing and a lid, and the outer casing and the lid are provided with electrical parts such as fuses and relays. In the housed electrical connection box for an automobile, the outer frame housing and the lid body, or one of the outer frame housing and the lid body is wholly or partially formed of a gas permeable and waterproof material. It is characterized by that. As described above, if the outer frame body and the lid body, or one or both of the outer frame body and the lid body are made of a gas-permeable and waterproof material, the functions of waterproofing and dustproofing are achieved. It is possible to let the hot air inside the junction box escape to the outside while maintaining.

[0005]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is an exploded perspective view of an embodiment of an automobile electrical junction box according to the present invention. In the figure, 1 is an outer frame housing, 2 is a relay, 3 is a fuse, 4 is an electric wire, 15 is an upper lid, 6 is a lower lid, and 7 is a wire outlet. The upper lid 15 is formed as an integrally formed body, and the upper surface 15a thereof is formed of a porous material having pores through which high-temperature air inside the junction box is likely to come out and moisture does not enter from the outside. ing. Specifically, it is made of a fluororesin or a polyolefin resin material having excellent waterproofness with pores. The size of the pores is preferably 25 mesh or more and 1000 mesh or less. The reason is that large pores of less than 25 mesh easily allow moisture to enter, and small pores of more than 10,000 mesh do not allow air to pass easily. As described above, when the upper surface 15a of the upper lid 15 is provided with the pores, the hot air that has risen in the connection box can easily escape to the outside. The upper lid 15 is not limited to the one integrally molded as described above, and may be formed by drawing a fluororesin or a polyolefin resin by solvent extraction or foaming. Further, a base cloth made by weaving natural fibers, artificial fibers or glass fibers may be coated with a fluororesin to be molded. Further, the porous material portion and the other portion of the upper lid body 15 may be formed separately and integrated later by an appropriate method. Further, it goes without saying that the portion where the porous material portion is provided is not limited to the upper surface of the upper lid, and may be provided in the outer frame housing or the lower lid.

[0006]

As described above, according to the present invention, an automobile including an outer frame body and a lid body, in which electric components such as fuses and relays are housed in the outer frame body and the lid body. In the electrical connection box for use, since the outer casing and the lid, or one of the outer casing and the lid, is wholly or partly formed of a gas-permeable and waterproof material. It has the excellent effects of having the function of waterproof and dustproof and allowing the hot air inside to escape to the outside.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of an electric connection box for an automobile according to the present invention.

FIG. 2 is an exploded perspective view of a conventional electric connection box for an automobile.

[Explanation of symbols]

 1 Outer Frame Housing 2 Relay 3 Fuse 4 Electric Wire 5, 15 Upper Lid 6 Lower Lid 7 Electric Wire Outlet 15a Top

Claims (1)

[Scope of utility model registration request] 1. An electric connection box for an automobile, comprising an outer frame body and a lid body, wherein electrical components are housed in the outer frame body and the lid body. An electric junction box for an automobile, wherein one or both of the frame housing and the lid is formed of a material that is gas permeable and waterproof.