JP2514378Y2 - Electrical junction box - Google Patents

Description

[Detailed description of the device]

[0001]

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

[0002]

2. Description of the Related Art A general structure of an electric junction box for an automobile is shown in FIG. The electrical connection box is a case 11 in which parts such as a fuse 12 and a relay 13 are housed, and an electric wire 14 for input / output for forming a predetermined circuit is connected to these parts via a bus bar or a connection terminal. Is. An upper cover 15 is mounted on the component mounting side of the case 11 for waterproof and dustproof, and a lower cover 16 is mounted on the lead-out side of the electric wire 14.

[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
The size is limited due to the space of the installation place, and if the number of electrical components of the car increases under the restriction, the number of parts such as fuses and relays increases, and the density of the connection circuit in the electric junction box also increases. .

As a result, the number of heat generating points such as the component itself and the connecting portion of the component terminal increases, and the overall temperature rise due to this tends to cause local overheating at the connecting portion of the component terminal. The terminals of fuses and other parts are plugged in and connected to the connection terminals housed in the case's connection terminal housing, so if the connection part locally overheats, the case's connection terminal housing may be melted or thermally deformed. And there is a problem in terms of reliability.

[0005]

SUMMARY OF THE INVENTION The present invention provides an electric junction box which solves the above-mentioned problems. One of the means is to form a large number of connection terminal housing parts in a case, In an electric junction box in which connection terminals for connecting parts such as fuses are housed in each connection terminal housing part, the heat absorption part of the heat pipe is installed by contacting a large number of connection terminal housing parts inside the case. The heat dissipating part is located outside the case (claim 1).

With this configuration, when heat is generated in any of the connection terminal housings, the heat is absorbed by the heat absorbing portion of the heat pipe via the connection terminal housings.
Since the heat pipe efficiently transports the heat to the outside of the case to radiate heat, the temperature rise in the connection terminal housing is suppressed, and local overheating can be prevented.

Another means of solving the above-mentioned problems is an electric device in which a large number of connecting terminal housings are formed in a case and connecting terminals for connecting parts such as fuses are housed in each connecting terminal housing. In the connection box, the entire length of the heat pipe is installed by contacting a large number of connection terminal housings in the case (claim 2).

In this way, when a high temperature part and a low temperature part occur in a large number of connection terminal housing parts, the temperature of each part is leveled by the heat transport function of the heat pipe. It is possible to prevent overheating.

In order to enhance the thermal conductivity from the connection terminal housing to the heat pipe, it is desirable that the space between the two is filled with resin.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 and 2 show an embodiment of the invention of claim 1. This electrical junction box is a so-called fuse block, in which a large number of connection terminal housing parts 21 are formed in the case 11, and the connection terminals 22 (only one part is shown and the others are omitted) are housed in each connection terminal housing part 21 and connected. The terminal 24 of the fuse 23 is inserted and connected to the terminal 22.

When viewed from the bottom side of the case 11, the connection terminal housing portions 21 are formed in two rows corresponding to the pair of terminals 24 of the fuse 23 (see FIG. 2), and each pair of connection terminal housing portions is formed. A groove 25 is formed between 21 (between a pair of terminals 24 of the fuse 23). The feature of this electric junction box is that the heat absorbing portion 27 of the heat pipe 26 is fitted into the groove 25. That is, the heat absorbing portion 27 of the heat pipe 26 is in contact with the connecting terminal housing portions 21 on both sides. Further, the heat radiation portion 28 of the heat pipe 26 is projected to the outside of the case 11, and heat radiation fins 29 are formed there.

As is well known, the heat pipe 26 is a metal tube whose both ends are hermetically sealed, in which the working fluid is sealed under reduced pressure. The heat is transferred from one end side to the other end side with extremely high efficiency by repeating the process of moving to the low heat dissipation part 28 side, radiating and liquefying there, and then returning to the heat absorption part 27 side again along the inner surface of the pipe. It has a function to do.

Therefore, in the electric connection box having the above-mentioned structure, the terminal 24 of the fuse 23 and the connection terminal in the housing portion 21 are connected.
If heat is generated at the connection with 22 or fuse 23
When the above-mentioned connection portion is heated by the heat generated in step S1, the heat is absorbed by the heat absorption portion 27 of the heat pipe 26 through the connection terminal housing portion 21, and the heat pipe 22 efficiently and efficiently
Since it is transported to the outside and radiated from the heat radiating portion 28, it is possible to suppress the temperature rise of the connection terminal housing portion 21 and the above-mentioned connection portion.

3 and 4 show another embodiment of the invention of claim 1. This electrical junction box is a so-called relay block in which a case 11 has a fuse connection terminal housing portion 21, a relay connection terminal housing portion 31, and the like. Also in the case of this electric connection box, by fitting the heat absorbing portion 27 of the heat pipe 26 into the groove 25 between the fuse connecting terminal housing portions 21 arranged in two rows, each connecting terminal housing portion 21 and the heat pipe 26 is inserted. Contact the heat absorbing part 27 of
Moreover, the heat dissipation portion 28 of the heat pipe 26 is projected outside the case 11. The heat radiation effect of the heat pipe 26 is the same as that of the above-mentioned embodiment.

5 and 6 show an embodiment of the invention of claim 2. In this electric junction box, the structure of the case 11 is the same as that of the embodiment shown in FIGS. 1 and 2, but the mounting structure of the heat pipe 26 is different. That is, by fitting the entire length of the heat pipe 26 into the groove 25 between the fuse connecting terminal housing portions 21 arranged in two rows, a large number of connecting terminal housing portions 21 and the heat pipe 26 are brought into contact with each other. .

In this way, when the temperature of a part of the connection terminal housing portion 21 becomes high, the heat is generated by the heat pipe 26.
Since it is dispersed in the other connecting terminal housing portion 21 by the heat transporting function, the temperature of each portion is leveled and, as a result, the local temperature rise can be suppressed.

7 and 8 show an embodiment of the invention of claim 3. This electric junction box has the same structure as that of the case 11 and the mounting structure of the heat pipe 26 as in the embodiment shown in FIGS. 1 and 2, but has a space between the connection terminal housing portion 21 and the heat pipe 26. To remove it, use resin 32 in the groove 25.
Is filled and solidified. It is desirable that the resin 32 has as high thermal conductivity as possible, and, for example, a resin having high thermal conductivity mixed with metal powder or the like can be used.

According to the above configuration, the connection terminal housing portion 21
The heat conductivity between the heat pipe and
The heat dissipation characteristics of 26 can be further improved. Note that this structure can also be applied to the electric junction box shown in FIGS. 5 and 6.

[0019]

As described above, according to the present invention, when the temperature of the connection terminal housing portion of the case rises, the heat can be efficiently dissipated to the outside by the heat pipe, or can be dispersed to another. Further, there is an effect that the temperature rise of the connection terminal housing portion can be suppressed and the melting damage or thermal deformation of the connection terminal housing portion can be prevented.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an electric junction box according to the invention of claim 1.

FIG. 2 is a bottom view of the electrical junction box of FIG.

FIG. 3 is a front view showing another embodiment of the electrical junction box according to the invention of claim 1.

FIG. 4 is a bottom view of the electrical junction box of FIG.

FIG. 5 is a front view showing an embodiment of an electric junction box according to the invention of claim 2.

6 is a bottom view of the electrical junction box of FIG.

FIG. 7 is a front view showing an embodiment of an electrical junction box according to the invention of claim 3.

8 is a bottom view of the electrical junction box of FIG.

FIG. 9 is a perspective view showing an example of a conventional electrical junction box.

[Explanation of symbols]

11: Case 21: Connection terminal housing 22: Connection terminal 23: Fuse 24: Terminal 25: Groove 26: Heat pipe 27: Heat absorption part 28: Heat dissipation part 29: Heat dissipation fin
32: Resin

Claims (3)

(57) [Scope of utility model registration request] 1. An electric connection box in which a large number of connection terminal housings are formed in a case, and connection terminals for connecting parts such as fuses are housed in each connection terminal housing.
An electric junction box characterized in that a heat absorbing part of a heat pipe is installed in contact with a large number of connection terminal housing parts inside a case, and a heat radiating part of the heat pipe is located outside the case. 2. An electric connection box in which a large number of connection terminal housing parts are formed in a case, and connection terminals for connecting parts such as fuses are housed in each connection terminal housing part.
An electric junction box, wherein the entire length of a heat pipe is installed by contacting a large number of connection terminal housings inside a case. 3. A resin is filled in a space between the connection terminal housing portion and the heat pipe.
Or the electric connection box described in 2.