JPH11215655A - Bus bar structure of electric connecting box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of laminated layers by accommodating in higher density the pattern area of bus bar to an electric connecting box. SOLUTION: In a bus bar structure accommodated in an electric connecting box where a tab terminal directed upward or downward is formed in the pattern area, other tab terminals 7c to 7i are welded adjacently to the pattern area of bus bar 7, in such a manner as forming at least a pair of upper and lower terminals or a pair of front and latter terminals or a pair of right and left terminals. As a result, the pattern area having enough space or width for erecting at least pair of tab terminals is no longer required and moreover another pattern area can be extended to these spaces. Accordingly, the pattern area can be formed in higher density, thereby reducing the number of laminated layers of bus bar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus bar structure housed in an electric junction box, and more particularly to a structure in which the number of layers is reduced by increasing the density of a pattern portion.

[0002]

2. Description of the Related Art An electrical junction box used for branch connection of a wire harness for automobiles to various electric components is designed such that branch connection points are concentrated in one place and wiring is rationally and economically connected. With the increase in the density of wire harnesses, various types have been developed according to vehicle types or applications.

[0005] As shown in FIG. 5, a bus bar 7 A is formed from a hoop material 6 by a press die as shown in FIG.
To 7C, and each of the bus bars 7A to 7C
The tab terminals 7a and 7b are cut and raised from the pattern portion in the vertical direction, and insulating plates 8A to 8C are interposed between the bus bars 7A to 7C, respectively. And a lower case 9B.

[0004] If one bus bar 7 as shown in FIG. 4 is taken as an example among the bus bars 7A to 7C, upward tab terminals 7a-1 to 7a-7 are provided at the ends of the pattern portion of the bus bar 7.
a-3 and downward tab terminals 7b-1 to 7b-4 are integrally formed.

[0005]

However, the long tab terminals 7a-1 to 7b-
In order to cut out 1 to 3, the tab terminal 7a
-1 and 7b-1 require a space for cutting and raising.

That is, as shown in FIG. 3A, after a pair of tab terminals 7a and 7b are punched out in a developed state on the side edge of the pattern portion of the bus bar 7, one of the tab terminals 7a is indicated by a two-dot chain line. In the case where the tab terminal 7b is bent upward as shown in the drawing and the other tab terminal 7b is bent downward as shown by a two-dot chain line to form a pair of upper and lower tabs, a large space is required for cutting and raising the tab terminals 7a and 7b. Become. Further, as shown in FIG. 3B, after a pair of upper and lower tab terminals 7a and 7b are punched out in a developed state inside the wide pattern portion of the bus bar 7, the tab terminals 7a are turned upward as shown by a two-dot chain line. When the tab terminal 7b is bent downward as shown by the two-dot chain line, a large pattern portion is needed to cut and raise the tab terminals 7a and 7b. Note that both tab terminals 7a, 7
b may be bent in the same direction to form a front and rear pair.

As described above, a large space or a wide pattern portion becomes a dead space due to the cut-and-raised pair of tab terminals 7a and 7b, and the bus bar 7 cannot be reduced in size and density. There was a problem that the number could not be reduced.

The present invention is most suitable for a bus bar to be accommodated in an electric junction box. In particular, the present invention provides a bus bar structure of an electric junction box in which the number of layers can be reduced by increasing the pattern density. .

[0009]

In order to solve the above-mentioned problems, the present invention provides a bus bar structure in which an upward or downward tab terminal is formed in a pattern portion and is accommodated in an electric junction box. Another object of the present invention is to provide a bus bar structure of an electric junction box, wherein separate tab terminals are welded to a pattern portion so that at least a pair of upper and lower sides, a pair of front and rear sides, or a pair of left and right sides are adjacent to each other.

According to the present invention, basically, the tab terminals are not integrally formed on the pattern portion of the bus bar, but the tab terminals are integrated with the end portion of the pattern portion where a wide space for cutting and raising is unnecessary. It may be formed. Then, separate tab terminals are welded to the bus bar pattern portions by a laser or the like so as to be at least one pair of upper and lower, front and rear, or left and right pairs.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. Note that the same components and operations as those of the prior art are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1A shows a bus bar structure according to the first embodiment, in which an upwardly bent tab terminal 7c is integrally formed at the end of the pattern portion of the bus bar 7, and a separate L terminal is bent. A tab terminal 7d is prepared, and the tab terminal 7d is directed downward, and the tab terminal 7e is brought close to the end of the pattern portion of the bus bar 7 so as to be in a symmetrical pair with the tab terminal 7e. Is welded by laser welding or the like.

FIG. 1B shows a bus bar structure according to the second embodiment, in which the tab terminal 7c unlike the first embodiment is not integrally formed at the end of the pattern portion of the bus bar 7.

Then, a pair of separate tab terminals 7d and 7e bent in an L-shape are prepared, and one of the tab terminals 7e faces upward, and the bent portion is provided on the upper surface of the end of the pattern portion of the bus bar 7. 7e 'is welded by laser welding or the like, and the other tab terminal 7d is directed downward so that it is close to the lower surface of the end of the pattern portion of the bus bar 7 so as to be in a symmetrical pair with the tab terminal 7e. Then, the margin 7d 'is welded by laser welding or the like a.

FIG. 2A shows a bus bar structure according to a third embodiment, in which a tab terminal 7 is provided in the middle of a pattern portion of the bus bar 7.
f, 7 g are welded or the like.

That is, a pair of separate tab terminals 7f, 7g bent in an L-shape are prepared, and the tab terminals 7f, 7g are turned upward, respectively, at predetermined intervals on the upper surface of the pattern portion of the bus bar 7. Then, the bending margins 7f 'and 7g' are welded by laser welding or the like a so as to be close to each other so as to be a symmetrical pair.

FIG. 2B shows a bus bar structure according to the fourth embodiment, in which a tab terminal 7 is provided in the middle of the pattern portion of the bus bar 7.
h, 7i are welded or the like.

That is, a pair of separate tab terminals 7h and 7i bent in an L-shape are prepared, and the tab terminals 7h and 7i are directed upward, respectively, and are separated from the upper surface of the pattern portion of the bus bar 7 by a predetermined distance. So that it is a symmetrical pair
The bending margins 7h 'and 7i' are welded by laser welding or the like a.

In each of the above-described embodiments, separate tab terminals 7 are provided on the pattern portion of the bus bar 7 so that at least a pair of upper and lower, a pair of front and rear, or a pair of left and right are provided close to each other.
Since each of c to 7i was welded by a laser or the like, at least a pair of tab terminals 7c, 7d, 7e, 7d, 7f, 7
It is not necessary to provide a large space or a wide pattern portion for cutting and raising g, 7h, 7i, etc., and another pattern portion can be added in these spaces. The number of stacked busbars can be reduced.

In each of the above embodiments, the pair of tab terminals 7c
7i are up and down, front and rear, and left and right, respectively, but may be appropriately combined such as upper front, upper left, lower rear, lower right and the like, and the tab terminals 7c to 7i It is not always necessary to provide one pair (two), and three or more may be used.

[0021]

As is clear from the above description, according to the present invention, a separate tab terminal is provided on a bus bar pattern portion so that at least a pair of upper and lower, front and rear, or left and right pairs are provided close to each other. By welding with each other, it is not necessary to provide a large wide space or a wide pattern portion for cutting and raising of at least a pair of tab terminals, and another pattern portion can be added to these spaces. Since the density of the portion can be increased, the number of stacked bus bars can be reduced.

Further, since the tab terminals are later welded to the bus bar pattern portion, the multilayer bus bars may have exactly the same shape, so that they can be molded with the same molding die and the cost of the mold can be reduced. Further, since the tab terminals can be welded to an arbitrary portion of the pattern portion of the bus bar, the degree of freedom in circuit design is improved, and it is easy to implement a grade.

[Brief description of the drawings]

FIG. 1A is an exploded perspective view of a bus bar structure according to a first embodiment of the present invention, and FIG. 1B is an exploded perspective view of a bus bar structure according to a second embodiment.

FIG. 2A is an exploded perspective view of a bus bar structure of a third embodiment, and FIG. 2B is an exploded perspective view of a bus bar structure of a fourth embodiment.

FIGS. 3A and 3B are perspective views of a conventional bus bar structure in an expanded state.

FIG. 4 is a perspective view of a conventional bus bar structure.

FIG. 5 is an exploded perspective view of a conventional bus bar processing and assembling procedure.

[Explanation of symbols]

 7 Bus bar 7c, 7d A pair of upper and lower tab terminals 7e, 7d A pair of upper and lower tab terminals 7f, 7g A pair of front and rear tab terminals 7h, 7i A pair of left and right tab terminals a Welding, etc.

Claims (1)

[Claims] 1. A busbar structure which is accommodated in an electric connection box and has upward or downward tab terminals formed in a pattern portion, wherein at least a pair of upper and lower, a pair of front and rear, or a right and left pair is provided in close proximity to the pattern portion of the busbar. To be a pair,
A bus bar structure for an electric junction box, wherein a separate tab terminal is welded.