JP2003217785A - Manufacturing method of connecting terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the mechanical characteristic of a movable contact piece. <P>SOLUTION: One conductive metal plate is punched, whereby A bottom plate 24, side plates 25 and 26 having locking holes 25a and 26a, respectively, top plates 27 and 28, a presser piece 29 continued to the front of the bottom plate 24, and a movable contact piece 30 continued to the front side edge of the bottom plate 24 through the bridge piece 29 on the side of the top plate 27 to have protruding pieces 30a and 30b, and extended in the rolling direction of a conductive metal plate are formed by punching the conductive metal plate. The movable contact piece 30 is bent in a reverse mountain shape in a contact part 30c and overlapped on the bottom plate 24, the side plates 25 and 26 are raised up to freely fit the protruding pieces 30a and 30b to the locking holes 26a and 25a, and the top plates 27 and 28 are mutually overlapped to form a terminal connecting part 22 having a square section. The overlapped connecting pieces 29 are cut in cut parts 30b and 30c. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a female connecting terminal for receiving a mating male connecting terminal.

[0002]

2. Description of the Related Art Conventionally, it has been customary to incorporate a movable contact piece in the connecting portion of a female type connecting terminal to enhance resilience at the time of connection when a mating insertion end is inserted. In many cases, the movable contact piece is formed by inserting a separate strip, and in some cases, the movable contact piece is simultaneously formed from the same conductive metal plate when press-molding the connection terminal.

For example, as disclosed in Japanese Unexamined Patent Publication No. 7-106043, it is manufactured by simultaneously punching out a movable connecting piece from a hoop-shaped conductive metal plate and bending the punched conductive metal plate. That is, as shown in FIG. 4, the punched body 1 punched in the punching step mainly includes the terminal connecting portion 2 and the wire crimping portion 3. The terminal connecting portion 2 includes a bottom plate 4, side plates 5 and 6 connected to both sides of the bottom plate 4, top plates 7 and 8 respectively connected to the side plates 5 and 6, and a bridge on the side of the top plate 7. A movable contact piece 10 that is connected to the front portion of the bottom plate 7 via the tangler piece 9 is formed.

In the punched body 1 formed in this manner, the movable contact piece 10 is folded back on the bottom plate 4 in the next bending step, and thereafter, the other parts are bent at the dotted line portions, as shown in FIG.
Although it is formed as a connection terminal as shown in the cross-sectional view of FIG. 1, the bridging piece 9 is cut in the process.

[0005]

However, in the above-mentioned conventional example, the movable contact piece 10 has the bottom plate 4, the side plates 5 and 6,
Similar to the top plates 7 and 8, the long side direction is arranged orthogonal to the longitudinal direction of the conductive metal plate when punching from the hoop-shaped conductive metal plate.

The hoop-shaped conductive metal plate is manufactured by rolling, and the properties as a spring material generally have anisotropy, and the mechanical properties of the spring material in the direction perpendicular to the rolling direction are inferior to those in the same direction, There is a problem in the spring characteristics and durability of the movable contact piece 10 having the long side direction in the direction orthogonal to the rolling direction shown in the conventional example.

It is an object of the present invention to provide a method of manufacturing a connection terminal which solves the above-mentioned problems and improves the spring characteristics and durability of the movable contact piece.

[0008]

In order to achieve the above object, a method of manufacturing a connecting terminal according to the present invention comprises a method of continuously punching and folding a hoop-shaped conductive metal plate whose rolling direction is the longitudinal direction by a forming press machine. In a method of manufacturing a connection terminal in which connection terminals are bent to form connection terminals one after another, a bottom plate arranged in a long side direction orthogonal to a longitudinal direction of the conductive metal plate, and both sides connected to both sides of the bottom plate in parallel with the bottom plate. A plate and a top plate arranged in parallel with these side plates and connected to at least one of the side plates and the bottom plate, the side plate, or the top plate connected via a bridging piece, and the long side direction thereof is the conductive metal plate. Forming a movable contact piece that is aligned with the longitudinal direction of the conductive metal plate, bending the bridging piece to stack the movable contact piece on the bottom plate, and standing both side plates. Raise the top plate with water Forming a connecting portion for receiving the mating connection end of the square cross section by bending the, characterized in that it consists of a step of cutting the bridge 絡片.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail based on the embodiments shown in FIGS. FIG. 1 shows a connection terminal 1 from a hoop-shaped conductive metal plate 11 whose longitudinal direction is the rolling direction.
It is a conceptual diagram of the state which punched out 2. The conductive metal plate 11 is in the shape of a hoop that is connected in the longitudinal direction P, and the individual connection terminals 12 are successively formed along the hoop while being connected by the connecting portion 13.

FIG. 2 is a development view of the punched body 21 in the embodiment. The punching body 21 is mainly the terminal connecting portion 2 at the front end.
2 and the electric wire crimping portion 23 at the rear end, and the central axis direction CC of the connection terminal is orthogonal to the rolling P of the conductive metal plate. Further, in the wire crimping portion 23, the wire core wire crimping piece 23a and the wire covering crimping piece 23b which are sequentially connected to the rear of the bottom plate 24 are connected.
To form.

The terminal connecting portion 22 has a bottom plate 24 having a long side direction orthogonal to the longitudinal direction P of the conductive metal plate 11 and provided with a projecting portion 24a, and side plates connected in parallel to the bottom plate 24 on both sides thereof. 25, 26 and these side plates 25, 26
Top plates 27 and 28 that are connected to the sides in parallel with the bottom plate 2
A movable contact piece 30 extending from the front edge of No. 4 through the bridging piece 29 in parallel with the rolling direction P of the conductive metal plate 11 at right angles to the long side direction of the bottom plate 24 is provided.

Further, locking holes 25a and 26a are provided in the central portions of the side plates 25 and 26, and a stabilizer piece 25 is provided in the rear portion.
b and 26b are formed respectively. And the movable contact piece 3
Ear-shaped protrusions 30a and 30b are formed on both side edges of 0, respectively.

Further, one top plate 28 is attached to the other top plate 2
7 is formed, and a cut-down portion 28a is formed behind the top plate 28.

By bending each dotted line portion of the punched body 21 thus formed, a terminal connecting portion 22 as shown in the vertical sectional view of FIG. 3 is formed. First, the movable contact piece 30 is bent in an inverted chevron shape at the contact portion 30c, and the bridging piece 29 is folded back at the obliquely folded portion 29a, so that the movable contact piece 30 is overlaid on the bottom plate 24. After that, the side plates 25 and 26 are respectively raised on both sides of the bottom plate 24, and the projecting pieces 30a and 30b of the movable contact piece 30 are engaged with the locking holes 26a and 2 of the side plates 26 and 25, respectively.
5a is loosely fitted in each.

Further, one of the top plates 28 is bent horizontally, and then the other top plate 27 is superposed on the top plate 28, and the squeezing portion 27 is formed.
a and 28a are overlapped. After that, the bridge pieces 29 that have been stacked are cut at the cut portions 29b and 29c to form the rectangular tube-shaped terminal connection portion 22. The stabilizer pieces 25b and 26b are raised together with the side plates 25 and 26, the electric wire core wire crimping piece 23a and the electric wire covering crimping piece 23b are respectively raised to form the U-shaped electric wire crimping portion 23,
At the time of use, the electric wire W is crimp-connected as shown in FIG.

In the connection terminal thus formed, when the mating connecting end (not shown) is inserted between the lowering portion 28a of the top plate 28 and the movable contact piece 30, the contact portion 30c of the movable contact piece 30 moves downward. When pressed, the movable contact piece 30 bends, and the projecting pieces 30a and 30b move vertically in the locking holes 25a and 26a. Both ends 30d and 31e of the free ends slide on the bottom plate 24, and excessive bending of the movable contact piece 30 is restricted by the locking holes 25a and 26a and the protrusion 24a of the bottom plate 24.

In the embodiment, the bridging piece 29 is used.
Although it extends from the bottom plate 24, the bridging pieces 29 may be extended from the side plates 25 and 26 or the top plates 27 and 28 although the shape and length of the bridging piece 29 are different.

[0018]

As described above, in the method of manufacturing the connection terminal according to the present invention, the long side direction of the movable contact piece is formed in the direction coinciding with the rolling direction of the conductive metal plate. A connection terminal with excellent durability can be obtained.

[Brief description of drawings]

FIG. 1 is a conceptual diagram when a connection terminal is manufactured from an electric metal plate.

FIG. 2 is a development view of the punched body according to the embodiment.

FIG. 3 is a vertical sectional view of an assembled connection terminal.

FIG. 4 is a development view of a punched body of a conventional example.

FIG. 5 is a vertical cross-sectional view of the assembled connection terminal.

[Explanation of symbols]

21 punched body 22 terminal connection 23 Wire crimping part 24 Bottom plate 25,26 Side plate 27, 28 Top plate 29 Bridge fragment 30 Moving contact piece

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshikazu Tanaka             529-1 Toyohamakita, Nerima-ku, Tokyo Ryosei             Denso Co., Ltd. (72) Inventor Makoto Enari             529-1 Toyohamakita, Nerima-ku, Tokyo Ryosei             Denso Co., Ltd. F-term (reference) 5E063 GA03 GA05 XA02

Claims (3)

[Claims] 1. A method of manufacturing a connection terminal, wherein a hoop-shaped conductive metal plate having a longitudinal direction as a rolling direction is continuously punched and bent by a forming press machine to form connection terminals one after another. A bottom plate arranged in the long side direction so as to be orthogonal to the longitudinal direction of the, and both side plates connected to both sides thereof in parallel with the bottom plate, and a top plate arranged in parallel with these side plates and connected to at least one side plate, A step of punching the conductive metal plate to form a movable contact piece that is connected from any one of the bottom plate, the side plate, and the top plate through a bridging piece and has its long side direction aligned with the longitudinal direction of the conductive metal plate. And a step of folding the bridging piece to stack the movable contact piece on the bottom plate, and a connecting portion for receiving the mating connecting end having a rectangular cross section by raising the both side plates and horizontally bending the top plate. And a step of forming And a step of cutting the bridging piece. 2. The method of manufacturing a connection terminal according to claim 1, wherein locking pieces are projected on both sides of the movable contact piece, and locking holes for locking the locking pieces are provided in the side plate. 3. The method for manufacturing a connection terminal according to claim 1, wherein both ends of the movable contact piece are free sliding ends.