JPS63250073A - Connection terminal for insertion - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an insertion connection terminal that can be used, for example, in a joint box for an automobile.

[Prior Art] Conventionally, circuit wiring members used in joint boxes for automobiles are made by punching a metal plate 1 made of a copper plate or a brass plate using a press, as shown in FIGS. 3 and 4, for example. In most cases, the bus bar 2 and tab terminal 3 are formed by bending. Since the wiring member in this case constructs a circuit from the flat metal plate 1, a lot of time is spent on designing for accommodating a large number of terminals within a predetermined space. However, there is a limit to the arrangement of the tab terminals 3 depending on the design. For example, it is impossible to arrange the tab terminals 3 vertically symmetrically at the same (IN) location across the bus bar 2. It is difficult to realize such a tab terminal 3, and it is inevitable that some volume will be sacrificed.As shown in Fig. 4, the yield of material in this case is poor, and in many cases 70%
It becomes scraps and becomes scrap. Furthermore, press dies for punching and bending have the disadvantage that they become extremely expensive as the circuit becomes more complex.

In order to solve this problem, the applicant has already filed a patent application in 1986-
No. 292172 and No. 292173 proposed an insertion connection terminal manufactured by casting means, but this insertion connection terminal tends to be easily broken due to its brittleness.

[Object of the Invention] An object of the present invention is to solve the above-mentioned problems and provide an insertion connection terminal that has good electrical connection performance with multiple contacts and is hard to break even when manufactured by casting means. There is a particular thing.

[Summary of the Invention] The gist of the present invention to achieve the above-mentioned object is to provide an insert characterized in that a protrusion is integrally formed along the longitudinal direction in the center of one side of the flat blade-like connecting end. This is a connection terminal for internal use.

[Embodiments of the Invention] The present invention will be explained in detail based on the embodiments shown in FIGS. 1 and 2.

In the present invention, as shown in FIG.
Approximately flat blade-shaped tab terminals 12 are protruded, and these conductive paths 11 and tab terminals 12 are integrally formed by casting means made of zinc alloy, aluminum alloy, or the like.

The entire body is 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. . The connection structure shown in FIG. 1 has the same circuit configuration as the conventional example shown in FIG.
The size of 2 is also shown at the same magnification, but overall the volume required by the insertion connection terminal including the surrounding space is approximately 6.
Even in the case of other shapes, the volume can be reduced by approximately 30 to 40%.

The size of the tab terminal 12 in this case is, for example, 12 m in length.
m, the width is 2.8 mm, the thickness of the tip 12a is 0.8 mm, and the thickness of the base is 0.9 mm, and as shown in an enlarged view in FIG. 2, the flat blade portion 12b has a draft that becomes thinner toward the tip. It is said to be tapered. A protruding portion 12c is formed along the longitudinal direction of the central portion of one side of the flat blade portion 12b.

As a result, since the tab terminal 12 has a taper, it can be easily extracted from the mold, and furthermore, the protruding portion 12c makes it easier to remove the tab terminal 12 from the mold when it is extracted or used, compared to a case where only the flat blade 12b is used. Less breakage. Also,
Contact with the mating female connecting terminal can be made using the protrusion 12c, and the electrical connection is also good.

Figures 5(a) and 5(b) show this tab terminal 12, respectively.
FIG. 2 is a perspective view and a cross-sectional view of a female connecting terminal 20 for connection with a female connecting terminal 20. FIG. This connection terminal 20 is made by punching and molding a thin metal plate, and its front end has a substantially rectangular cylindrical shape that receives the flat blade part 12b of the tab terminal 12, and the front side thereof has a protrusion 12c.
A slit portion 20a is provided for receiving the spring, and spring contact pieces 2 are provided upwardly on both sides of this slit portion 20a.
0b and 20b are folded back to sandwich the protruding portion 12c. Further, inside the connecting terminal 20, a movable contact piece 20c for contacting the flat blade portion 12M of the tab terminal 12 is provided. This movable contact piece 20c
cuts out the bottom 20d, with the free end facing forward. Note that 21 is an electric wire connected to the connection terminal 20 via a crimp piece 20e.

When the tab terminal 12 is inserted into the female connecting terminal 20, the protruding strip 12c of the tab terminal 12 elastically contacts the spring contact pieces 20b, 20b of the connecting terminal 20, and the flat blade portion 12b elastically contacts the movable contact piece 20c. Therefore, the electrical connection performance is extremely good.

In the above-described embodiment, the tab terminal 12 is manufactured by casting means, but it goes without saying that a similar shape may be formed by punching and bending an ordinary conductive metal plate. In this case, it is not necessary to provide the flat blade portion 12b with a taper angle.

Furthermore, even in this case, the female type connection terminal 20 shown in FIG. 5 can be used as the mating connection terminal.

[Effects of the Invention] As explained above, the insertion connection terminal according to the present invention has the effect of increasing the strength of the flat-blade-shaped connection end because the protrusion is provided, and furthermore, the contact point is Because of this increase, its electrical and mechanical reliability is high, and there is less instantaneous interruption due to vibration between it and the female connection terminal, and less heat generation at the contact portion.

[Brief explanation of the drawing]

1 and 2 of the drawings show an embodiment of the insertion connection terminal according to the present invention, FIG. 1 is a perspective view thereof, FIG. 2 is a perspective view of a tab terminal, and FIG. 3 is a conventional one. A perspective view of a wiring member having tab terminals, FIG. 4 is an explanatory diagram of material removal, and FIG. 5 (
FIG. 1A is a perspective view of a female connecting terminal used in cooperation with the connecting terminal according to the present invention, and FIG. 3B is a sectional view thereof. 11 is a conductive path, 12 is a tab terminal, 12a is a tip,
12b is a flat blade portion, 12c is a protrusion portion, and 20 is an m-type connecting terminal. N1 Figure 3 Figure 4 Figure 5 (Q) (b)

Claims (1)

[Scope of Claims] 1. An insertion connection terminal characterized in that a protrusion is integrally formed along the longitudinal direction in the center of one side of the flat blade-like connection end. 2. The insertion connection terminal according to claim 1, wherein the flat blade-shaped connection end is manufactured by casting means. 3. The insertion connection terminal according to claim 2, wherein the flat blade-like connection end has a thin tapered tip.