JPH05833B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a circuit wiring member used, for example, in a joint box for an automobile.

[Prior Art] Circuit wiring members conventionally used in joint boxes for automobiles are produced by punching and bending a metal plate 1 made of copper or brass using a press, as shown in FIGS. 4 and 5, for example. In most cases, the bus bar 2 and tab terminal 3 are formed by processing. In this case, since the circuit wiring member is constructed from a flat metal plate 1, a lot of time is spent designing how to efficiently accommodate many terminals within a given space. .

However, there is a limit to the arrangement of the terminals 3 due to the design, and for example, it is not possible to arrange the tab terminals vertically symmetrically at the same location with the bus bar 2 in between. Therefore, it is difficult to realize terminals 3 that are arranged in high density, and it is inevitable that a certain amount of volume will be sacrificed. As shown in FIG. 5, the material removal yield in this case is poor, and in many cases, 50 to 70% of the material becomes scrap.
Furthermore, a press die for bending is indispensable.

[Object of the Invention] An object of the present invention is to provide a method for manufacturing a circuit wiring member that eliminates the above-mentioned drawbacks and can manufacture a complicated circuit through a simple process.

[Summary of the invention] The gist of the present invention for achieving the above object is as follows:
A circuit characterized by comprising a first step of forming a flat board with tab terminals planted in necessary locations by casting means, and a second step of punching out predetermined locations of the board to form a circuit. This is a method for manufacturing a wiring member.

[Embodiments of the Invention] The method according to the present invention will be explained in detail based on the embodiments illustrated in FIGS. 1 to 3.

Figure 1 shows a substrate 1 manufactured in the first step by casting means made of zinc alloy, aluminum alloy, etc.
1, in which a plurality of tab terminals 12 protrude upward and downward from a planar substrate 11, respectively.

The substrate 11 manufactured by the first step in this way
On the other hand, if a press mold is used in the second step to punch out unnecessary parts as shown in Figure 2,
A circuit wiring member 13 having a predetermined circuit configuration is obtained. Moreover, the burrs generated in the first step can be removed at the same time by this second step.

FIG. 3 shows another circuit configuration, and is a perspective view of a circuit wiring member 13' manufactured by the first and second steps.

Note that the circuit wiring member 13' shown in FIG.
The circuit configuration is the same as the conventional example shown in FIG. The volume has been reduced by approximately 60%.

Also, even in the case of other shapes, generally 30~
Its volume can be reduced by about 40%. Casting involves pouring molten metal into a mold, etc., so spools and runners are generated in the process, and the punched parts generated in the second process become scrap, but the rate of scrap generation is lower than in conventional methods. There are few. In addition, these spools, runners,
Scrap can be recycled and effectively used in casting.

Note that among the parts to be punched out in the second step, a large punched part may be previously formed as a notch in the first step.

[Effects of the Invention] The method for manufacturing a circuit wiring member according to the present invention described above allows easier circuit design than the conventional punching method using a press, requires almost no bending allowance, and allows a large number of tab terminals to be formed at high heights. They can be arranged densely, and furthermore, they can be made smaller than conventional circuit wiring members. Furthermore, even if the circuit needs to be changed, the circuit board can be used as is and only the punching press die can be changed. Furthermore, compared to the case where the circuit portion is molded by casting means, the metal material is evenly distributed even to the ends of the circuit, resulting in better mechanical and electrical characteristics.

[Brief explanation of the drawing]

Drawings 1 to 3 show examples of members manufactured by the method for manufacturing circuit wiring members according to the present invention. A perspective view of a circuit wiring member according to the process,
FIG. 3 is a perspective view of a circuit wiring member according to another embodiment, and FIG. 4 is a perspective view of a conventional circuit wiring member.
FIG. 5 is an explanatory diagram of the material removal process. Reference numeral 11 is a board, 12 is a tab terminal, 13,1
3' is a circuit wiring member.

Claims (1)

[Claims] 1. A first step of forming a flat board with tab terminals planted in necessary locations by casting means, and a second step of punching out predetermined locations of the board to form a circuit. A method of manufacturing a circuit wiring member, characterized in that: 2. The method of manufacturing a circuit wiring member according to claim 1, wherein in the first step, a notch is provided in a part of the substrate.