JP2012055108A - Electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive electric connection box which includes a case body having high rigidity and high transportation efficiency while having a simple configuration.SOLUTION: The electric connection box 1 for an automobile includes: the case body 2 having a peripheral wall 20 formed to have a frame shape; and a single cassette block 3 to which a plurality of electrical components 11, 12 are fitted. The peripheral wall 20 is constituted by a double wall comprising an inner wall 21 and an outer wall 22 arranged leaving intervals with the inner wall 21, over the entire circumference. Both side faces 31a, 31b of the cassette block 3 face a pair of faces 21a, 21b of the inner wall 21 opposing to each other, respectively. Of the peripheral wall 20, the intervals K1, K2 between the inner wall 21 and the outer wall 22 at ends B, C located on the front side of the automobile are formed to be wider than intervals K3, K4, K5 between the inner wall 21 and the outer wall 22 at other portions.

Description

  The present invention relates to an electric junction box attached to an engine room of an automobile.

  A variety of electronic devices are mounted on automobiles. In order to supply electric power to these various electronic devices, an electric junction box is disposed at an appropriate position between the power source and the electronic device in the automobile (see, for example, Patent Document 1). FIG. 6 is an exploded view of a conventional electrical junction box.

  An electric junction box 201 shown in FIG. 6 includes a case main body 202 having a peripheral wall 220 formed in a frame shape, and a cassette block attached to the inside of the case main body 202 and mounted with a plurality of electric components such as fuses and relays. 203a, 203b, an upper cover (not shown) attached to the upper surface of the case body 202, and a lower cover (not shown) attached to the lower surface of the case body 202.

  The case main body 202 has a configuration in which the opposing walls of the peripheral wall 220 are connected by a plurality of bridges 221 in order to improve rigidity. With such a configuration of the case body 202, the electrical junction box 201 is provided with a plurality of the cassette blocks 203a and 203b. That is, in the electrical junction box 201, the inner side of the peripheral wall 220 is partitioned into a plurality of spaces by the bridge 221, and a single cassette block cannot be attached, and thus a plurality of cassette blocks 203a and 203b are used. ing.

JP 2007-31493 A

  However, the conventional electrical junction box 201 described above has the following problems when the cassette blocks 203a and 203b and the case main body 202 are transported from each manufacturing factory to an assembly factory or the like. First, in the case main body 202, the inner side of the peripheral wall 220 is partitioned into a plurality of spaces by the bridge 221. Therefore, other parts cannot be accommodated in the case main body 202 and transported, so that air can be used. There is a problem that transportation efficiency is low and transportation efficiency is poor. In addition, since there are a plurality of types of cassette blocks 203a and 203b, a plurality of types of packing materials must be prepared, and there is a problem that it takes much time and cost.

  Furthermore, in the above-described conventional electrical junction box 201, a mold having a complicated shape is required to manufacture the case main body 202 provided with the bridge 221, and a plurality of types of cassette blocks 203a and 203b are manufactured. In order to do so, a plurality of types of molds are required, which causes a problem that the manufacturing cost is very high.

  Accordingly, an object of the present invention is to provide an inexpensive electrical junction box having a case body having a simple structure and high rigidity and high transportation efficiency.

  In order to achieve the above object, an invention described in claim 1 is an electrical connection for an automobile comprising a case body having a peripheral wall formed in a frame shape, and a cassette block on which a plurality of electrical components are mounted. In the box, the peripheral wall is constituted by a double wall consisting of an inner wall and an outer wall spaced from the inner wall over the entire circumference, and the single cassette block is attached to the inside of the case body, The electric junction box is characterized in that both side surfaces of the cassette block face a pair of surfaces facing each other on the inner wall.

  The invention described in claim 2 is the invention described in claim 1, wherein, in the peripheral wall, an interval between the inner wall and the outer wall at an end portion positioned on the front side of the automobile is different from that in the other portion. It is characterized by being formed wider than the interval between the inner wall and the outer wall.

  According to the first aspect of the present invention, the peripheral wall is composed of a double wall consisting of an inner wall and an outer wall spaced apart from the inner wall over the entire circumference. The rigidity of the case body can be increased without providing a bridge that connects the opposing walls of each other, and the bridge can be eliminated. Therefore, a single cassette block can be attached to the inside of the case body in which the inside of the peripheral wall is not partitioned into a plurality of spaces by the bridge. Therefore, when transporting the case body to an assembly plant or the like, other parts can be accommodated in the case body and transported, and transport efficiency can be improved. Moreover, since this case main body is a simple structure in which the bridge is not provided, it can avoid that a metal mold | die becomes complicated shape and can reduce manufacturing cost. Therefore, it is possible to provide an inexpensive electrical junction box including a case body having a simple structure and high rigidity and high transportation efficiency.

  According to the second aspect of the present invention, the distance between the inner wall and the outer wall at the end portion of the peripheral wall positioned on the front side of the automobile is greater than the distance between the inner wall and the outer wall at other portions. Since the distance between the inner wall and the outer wall of the end portion serves as a cushion during a car collision, the impact of the collision can be absorbed.

It is a perspective view which shows the electrical junction box concerning one embodiment of this invention. FIG. 2 is an exploded view of the electrical junction box shown in FIG. 1. It is sectional drawing along the AA line in FIG. FIG. 2 is a plan view showing a state where an upper cover is removed from the case main body shown in FIG. 1. It is a top view in the state where a cassette block was removed from the case body shown in FIG. It is an exploded view of the conventional electrical junction box.

  An electrical junction box according to an embodiment of the present invention will be described with reference to FIGS. The electrical junction box of the present invention is attached to an engine room of an automobile and supplies power and transmits signals to various electronic devices mounted on the automobile. In the present specification, the junction block (junction box), the fuse block (fuse box), and the relay block (relay box) are collectively referred to as an electrical connection box.

  As shown in FIGS. 1 and 2, the electrical junction box 1 includes a case body 2 having a peripheral wall 20 formed in a frame shape, and is attached to the inside of the case body 2, and includes a fuse 11, a relay 12, a bus bar, and the like. The single cassette block 3 to which the plurality of electrical components are mounted, the upper cover 4 attached to the upper surface of the case main body 2, and the lower cover 5 attached to the lower surface of the case main body 202 are provided. In FIG. 2, illustration of electrical components mounted on the cassette block 3 is omitted.

  As shown in FIGS. 3 to 5, the case body 2 includes a peripheral wall 20 formed in a frame shape, and component mounting portions 23 and 24 to which the connector 13 and the relay 14 are directly mounted. Moreover, the surrounding wall 20 is comprised by the double wall which consists of the inner wall 21 and the outer wall 22 spaced apart from this inner wall 21 over the perimeter. Further, the component mounting portions 23 and 24 are provided on the surface of the inner wall 21. Such a case body 2 is made of a synthetic resin and is integrally formed by a well-known injection molding.

  In the electrical junction box 1 of the present invention, a single cassette block 3 is attached inside the case body 2. The cassette block 3 is formed in a block shape from a synthetic resin. As shown in FIG. 4, the cassette block 3 is configured such that both side surfaces 31 a and 31 b in the longitudinal direction of the cassette block 3 face a pair of opposite surfaces 21 a and 21 b on the inner wall 21 of the case body 2. It is attached to the case body 2.

  In other words, in the present invention, the peripheral wall 20 is constituted by a double wall consisting of the inner wall 21 and the outer wall 22 over the entire circumference, and a bridge that connects the opposing walls of the peripheral wall 20 is not provided as in the conventional product. However, since the rigidity of the case body 2 can be increased, the bridge is eliminated. And the inside of the surrounding wall 20 becomes a structure by which the single cassette block 3 is attached to the inside of the case main body 2 which is not partitioned by the bridge into several space.

  Therefore, when the case body 2 is transported from a manufacturing factory to an assembly factory or the like, other parts can be accommodated in the case body 2 and transported, and transport efficiency can be improved. Moreover, since this case main body 2 is a simple structure in which the bridge is not provided, it can avoid that a metal mold | die becomes a complicated shape and can reduce manufacturing cost. Further, since there is only one cassette block 3 used in the electrical junction box 1 of the present invention, that is, only one type, the manufacturing cost and the transportation cost are reduced as compared with the conventional product using a plurality of types of cassette blocks. Can be lowered.

  Furthermore, in this invention, as shown in FIG.4 and FIG.5, the space | intervals K1, K2 of the inner wall 21 and the outer wall 22 in the edge parts B and C located in the front side of a motor vehicle among the surrounding walls 20 of the case main body 2 are set. In other parts, the gaps K3, K4, K5 between the inner wall 21 and the outer wall 22 are formed wider. 4 and 5 indicate the front of the automobile. With such a configuration, the electric junction box 1 can absorb the impact of the collision by using the gaps K1 and K2 between the inner wall 21 and the outer wall 22 of the end portions B and C as cushions when the automobile collides. .

  In addition, since the peripheral wall 20 of the electrical junction box 1 of the present invention is formed of a double wall over the entire circumference, the heat generated by the electric wires and electrical components is transmitted from between the double walls to the electrical junction box 1. It can dissipate heat to the outside.

  As described above, according to the present invention, it is possible to provide an inexpensive electrical junction box 1 that includes the case body 2 having a simple configuration and high rigidity and high transportation efficiency.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

1 Electrical Junction Box 2 Case Body 3 Cassette Block 11 Fuse (Electrical Parts)
12 Relay (electric parts)
20 peripheral wall 21 inner wall 21a, 21b surface 22 outer wall 31a, 31b both sides

Claims (2)

In an electrical junction box for an automobile comprising a case body having a peripheral wall formed in a frame shape and a cassette block on which a plurality of electrical components are mounted,
The peripheral wall is composed of a double wall consisting of an inner wall and an outer wall spaced apart from the inner wall over the entire circumference,
A single cassette block is mounted inside the case body;
An electrical junction box, wherein both side surfaces of the cassette block face a pair of surfaces facing each other on the inner wall. The space between the inner wall and the outer wall at the end portion positioned on the front side of the automobile among the peripheral walls is formed wider than the distance between the inner wall and the outer wall in other portions. Item 3. An electrical junction box according to Item 1.

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