JPH0312203Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention relates to fuse boxes, and more specifically, it is designed to more effectively dissipate the heat generated by the fuse, and also to provide a waterproof function. This relates to a waterproof heat-dissipating fuse box.

[Conventional technology]

In conventional fuse boxes, heat generated by the current flowing through the fuse is radiated through the wire harness and the air inside the fuse box. For this reason, with waterproof fuseboxes that increase the degree of sealing inside the fusebox, almost no heat exchange through air can be expected, and in order to secure the amount of heat exchange through air in the fusebox, it is necessary to increase the internal volume of the fusebox. I had to. Therefore, this method cannot be implemented in a fuse box installed in a limited space.

[Purpose of invention]

This invention eliminates the drawbacks of the prior art mentioned above,
The object of the present invention is to use the box itself as a heat dissipating body to improve heat dissipation efficiency even in a closed fuse box with a small volume.

[Summary of the idea]

In order to achieve the above-mentioned object, this invention includes a case with a socket in which a plurality of fuses can be attached to a terminal fitting in parallel, a cover attached to the socket case via waterproof packing, and an elastic structure between the fuse and the cover. An electrically insulating heat transfer member having an electrically insulating heat transfer member is interposed to conduct heat generated by the fuse and the terminal fitting to the cover to cool the cover and prevent the fuse from being removed, and is connected to the terminal fitting of the socket. The lead wire is led out through a grommet in a watertight manner.

[Structure of the embodiment of the invention]

As shown in FIGS. 1 to 4 a and b, the waterproof heat dissipation type fuse box A of this invention is a bifurcated terminal fitting formed by injection molding using synthetic resin as a material and having a lead wire 6 attached thereto. 2 is inserted and fixed into the mounting hole 13, and a grommet 8 is installed to close the opening on the extraction side of the lead wire 6. A case 1 with a socket, a cover 3 attached to the case 1, and a pair of terminal fittings 2 are provided. It is composed of a fuse 4 to be inserted, a waterproof packing 7, and a resilient electrically insulating heat transfer member 5 made of rubber impregnated with heat radiation grease.

The case 1 with a socket is a case body 1 with a surrounding edge formed on one side as shown in FIGS. 1 to 4b.
1, a waterproof packing 7 is attached to the stepped part 14 of the case body 11, and approximately H-shaped attachment holes 13 for attaching the terminal fittings 2 are formed in two rows at a constant interval. It has a structure that is designed to create the following.

The cover 3 is made of a heat transfer material, and the cover body 31 has a U-shaped cross section and is large enough to be in contact with the stepped part 14 of the case body 11. The cover body 31 has a heat dissipation fin 32 on the top surface of the cover body 31 and the case body 11 on the outside. It has a structure in which mounting rings 33 that are engaged with the cover mounting claws 12 of 1 are respectively projected.

The heat transfer member 5 is formed of a plate-like member made of rubber impregnated with silicon-based heat dissipation grease, which has insulation properties, elasticity, and good thermal conductivity.

[Effect of invention]

The waterproof heat-dissipating fuse box A of this invention is
As shown in FIGS. 2a and 3b and 3a and 3b, the fuse 4 is connected to the terminal fitting 2 installed in the mounting hole 13 of the case body 11.
By attaching the elastic heat transfer member 5 described above to the inside of the cover 3 and locking the mounting ring 33 of the cover 3 to the cover mounting claw 12 of the case 1 with a socket, the top surface of the fuse 4 is configured to conduct elastic heat transfer. Heat generated by the fuse in contact with the member 5 is transmitted to the cover 3 through the member 5 and is actively radiated to the atmosphere via the heat radiation fins 32.

[Effect of idea]

As described above, this invention includes a case with a socket that allows multiple fuses to be attached in parallel to a terminal fitting, a cover that is attached to the case with the socket via waterproof packing, and a resilient material between the fuse and the cover. a lead connected to the terminal fitting of the socket, with an electrically insulating heat transfer member interposed therebetween to conduct the heat generated by the fuse and the terminal fitting to the cover to cool the cover and prevent the fuse from being removed; and a lead connected to the terminal fitting of the socket. Since the wire is led out through a grommet in a watertight manner, the heat generated by the fuse can be radiated through a heat transfer object at a rate ten to several hundred times higher than when air is used as the medium. ,
Not only can the fuse box itself be made smaller because it does not require the volume of air required for cooling, but it also has a waterproof structure that provides good insulation, and the fuse does not come out of the socket due to vibration. It is very advantageous against vibrations and shocks, and has the effect of being able to handle large current applications without increasing the size of the fuse box.

[Brief explanation of the drawing]

Figures 1 to 4 a and b each show an embodiment of this invention. Figure 1 is an exploded perspective view of a fuse box, and Figure 2 a is the structure of a case with a socket to which a terminal fitting is attached. Perspective view showing Figure 2b
is a perspective view of the terminal fitting, Figure 3a is a perspective view of the fuse attached to the case with socket, and Figure 3b is a perspective view of the terminal fitting.
4A is a perspective view of the fuse box, and FIG. 4B is a sectional view taken along line AA in FIG. 4A. 1... Case with socket, 2... Terminal fitting, 3
... Cover, 4 ... Fuse, 5 ... Elastic electrically insulating heat transfer member (thermal grease impregnated rubber),
6...Lead wire, 7...Waterproof packing, 8...
Grommet.

Claims (1)

[Scope of utility model registration request] A case 1 with a socket in which a fuse 4 is attached in parallel to a large number of terminal fittings 2, 2, a heat dissipation cover 3 attached to the fuse 1 with a socket via a waterproof packing 7, and the fuse 4 and the terminal fittings 2, 2. and a resilient electrically insulating heat transfer member 5 interposed between a heat dissipation cover 3 and a lead wire 6 connected to the terminal fittings 2, 2, which are led out of the case 1 with a socket in a watertight manner. Waterproof heat dissipation type fuse box.