JPH0363191B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a connecting terminal for manufacturing a flat-blade connecting terminal that can be used, for example, in a joint box for an automobile.

[Conventional technology]

Conventionally, circuit wiring members used in joint boxes for automobiles are made by punching and bending a metal plate 1 made of a copper plate or a brass plate using a press, as shown in FIGS. 4 and 5, for example, to form a bus bar. In most cases, the tab terminal 3 is formed with the terminal 2. Since the wiring member in this case constructs a circuit from the flat metal plate 1, a lot of time is spent on designing to accommodate many terminals in a predetermined space. However, due to its design, terminal 3
There is a limit to the arrangement of the tab terminals 3, for example, it is impossible to arrange the tab terminals 3 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 yield of material extraction in this case is poor;
In most cases, 50 to 70% of the material becomes scrap. Furthermore, press dies for punching and bending have the disadvantage that they become extremely expensive as the circuit becomes more complex.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a method for manufacturing a connecting terminal in which the connecting terminal can be formed by casting means and can be easily extracted from the mold.

[Summary of the Invention] The gist of the present invention to achieve the above-mentioned object is to make the thickness of the flat-blade connecting terminal tapered with different angles at the base and the tip, and to make the taper angle of the base part equal to the taper angle of the tip part. This method of manufacturing a connecting terminal is characterized by making the connecting terminal larger than the size of the connecting terminal and manufacturing the connecting terminal by casting.

[Embodiments of the invention]

The present invention will be explained in detail based on the embodiments shown in FIGS. 1 to 3.

In the connection part structure of the cast terminal manufactured by the method according to the present invention, as shown in FIG. 12 protrudes, and these conductive portions 11 and tab terminals 12 are integrally formed by casting means of zinc alloy, aluminum alloy, or the like. The entire structure is then plated if necessary.

In this case, the thickness of the conductive path 11 that requires a large current capacity is changed to increase the cross-sectional area, making it possible to adjust the current density without changing the overall volume. . Note that the connection structure shown in FIG. 1 has the same circuit configuration as the conventional example shown in FIG. The volume including the surrounding space required by the connection structure is reduced to about 60%, and even in the case of other shapes, the volume can be reduced by about 30 to 40%.

In this case, the size of the tab terminal 12 is, for example, 12 mm in length, 2.8 mm in width, 1.0 mm in thickness at the base 12a, and 0.8 mm in thickness at the tip 12b. It has a tapered shape that becomes thinner. This taper angle is particularly large on the base 12a side and small on the tip 12b side.
In the embodiment shown in FIG. 2, the taper angle is changed in two steps: 0.8 degrees on the base 12a side,
On the 2b side, it is 0.2 degrees.

In the embodiment shown in FIG. 3, the taper angle gradually changes over the entire length of the tab terminal 12. Even in this case, the taper angle on the base 12a side is larger than that on the tip 12b side.

By doing so, the tab terminal 12 can be easily extracted from the mold, and breakage during extraction is reduced compared to a case where the entire tab terminal is flat. Further, the contact with the mating connection terminal is mainly made by the tip end 12b, and since the taper angle thereof is minute, almost no electrical or mechanical problems occur.

〔Effect of the invention〕

As explained above, in the method for manufacturing a connecting terminal according to the present invention, a flat-blade connecting terminal manufactured by casting means is provided with a draft angle, and this taper angle is made different between the base and the distal end. The connecting terminal has the advantage that it is easy to pull out from the mold and also has good connection performance with a mating connecting terminal.

[Brief explanation of drawings]

Drawings 1 to 3 show an example of a connection part structure of a cast terminal manufactured by the method of manufacturing a connection terminal according to the present invention, and FIG. 1 is a perspective view thereof, FIG.
FIG. 3 is a perspective view of a tab terminal, FIG. 4 is a perspective view of a wiring member having a conventional tab terminal, and FIG. 5 is an explanatory diagram of material removal. Reference numeral 11 is a conductive path, 12 is a tab terminal, 12a is a base, and 12b is a tip.

Claims (1)

[Claims] 1. The thickness of the flat-blade connecting terminal is tapered at different angles at the base and tip, the taper angle of the base is larger than the taper angle of the tip, and it is manufactured by casting. A method for manufacturing a connecting terminal. 2. The method of manufacturing a connecting terminal according to claim 1, wherein the two taper angles are divided at an intermediate portion between the base portion and the tip portion. 3. Claim 1, wherein the two taper angles gradually change as they proceed from the base to the tip.
The method for manufacturing the connection terminal described in . 4. The method for manufacturing a connecting terminal according to claim 1, wherein the casting is performed using a zinc alloy or an aluminum alloy.