JPH0586033B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a female connecting terminal that fits into a mating insertion connecting terminal and has a movable contact piece.

[Prior Art] This type of female connection terminal usually has a connection part at the front that receives the mating insertion connection terminal, and a wire crimping part at the back that connects the wire. It is formed by punching and bending a metal plate.

In this case, the connection part has a rectangular cylindrical shape surrounded by a bottom plate, two raised side plates on both sides of the bottom plate, and a top plate that is made by bending these side plates inward. A movable contact piece that is punched out and extends from the front end of the bottom plate is folded back inside, and a mating flat-blade-shaped insertion connection terminal is received between this movable contact piece and the top plate. It has been known.

That is, in the state before this connection terminal is bent and formed, the movable contact piece 1 as shown in FIG.
Since the connecting terminals extend in the longitudinal direction from the front end of the bottom plate 2, when cutting them out one after another from a single conductive metal plate 3, due to the presence of the movable contact piece 1. This requires wide dimensions overall. Therefore, the area of the conductive metal plate 3 required to make one connection terminal is quite large, and there is a problem in that the waste of material is correspondingly large. In addition, 4 and 5 are side plates, 6 and 7 are top plates, and 8
is the wire crimping part.

In order to eliminate this drawback, the applicant has proposed
He proposed the idea described in Publication No. 61-87475.
As shown in Fig. 8, this invention minimizes the waste of material by connecting the movable contact piece 1 to the side of the side plate 4 via a connecting piece, punching it out, and bending it from the side. It is something.

However, although this connection terminal is advantageous in terms of material removal, since the top plate 6 and the movable contact piece 1 are separated from each other left and right, the movable contact piece 1
It is difficult to firmly attach it to the top plate 6,
There is a high possibility that the movable contact piece 1 will not have sufficient strength, and the movable contact piece 1 will be deformed due to the prying force or the like exerted by the mating connection terminal. In addition, since the movable contact piece 1 is fixed to the top plate 6 last, it is difficult to design the pressing process, and the pressing speed cannot be increased.
There is also the problem that efficient manufacturing is not possible.

SUMMARY OF THE INVENTION An object of the present invention is to provide a connecting terminal that eliminates the above-mentioned drawbacks, reduces waste in material removal, and can easily and efficiently reinforce a movable contact piece.

[Means for Solving the Problems] In order to achieve the above object, in the connection terminal according to the present invention, a single conductive metal plate is punched and formed so that it is electrically connected to the mating insertion connection terminal in the front. In a connection terminal that is provided with a prismatic cylindrical connection part and a wire crimping part for connecting the wires at the rear, the connection part has a bottom plate, two side plates raised from both sides of the bottom plate, and A top plate further bent in the horizontal direction from one side is connected to the side of the top plate via a connecting piece, the connecting piece is folded back to overlap the inside of the top plate, and the top plate is placed on top of the top plate. has a movable contact piece fixed to the top plate by folding back a presser piece extending at the front end of the movable contact piece, and the movable contact piece is formed into an inverted mountain shape toward the inside, and the free end of the rear part thereof is fixed to the top plate. It is characterized in that the mating insertion connection terminal is engaged with a notch hole provided in the top plate and inserted between the movable contact piece and the bottom plate.

[Function] The connection terminal having the above configuration connects the movable contact piece to the top plate via the connecting piece, folds back the connecting piece to overlap the movable contact piece on the top plate, and then connects the holding piece to the movable contact piece. The front end of the movable contact piece is fixed by folding it over one side, and then the whole is bent.

[Example] The present invention will be described in detail based on the example illustrated in FIGS. 1 to 5.

FIG. 1 is a perspective view of a connection terminal according to the present invention, and FIG.
The figure shows a plan view, FIG. 3 a longitudinal cross-sectional view, and FIG. 4 a cross-sectional view. All parts of the connection terminal 11, including the front connection part 12 that receives the mating insertion connection terminal and the rear wire crimping part 13, are formed by bending a single conductive metal plate, and the wire crimping part 13 Similar to the conventional one, the core wire crimping part 14 and the covering crimping part 15 are each formed in a U-shape.

The connecting portion 12 includes a bottom plate 17 having two elastic contact portions 16 that bulge inward, side plates 18 and 19 that are continuous on both left and right sides of the bottom plate 17, and a top plate 20 formed by bending one of the side plates 18 in the horizontal direction. The movable contact piece 21 connected to the side of the top plate 20 is folded back and fixed inside the cylindrical shape. This movable contact piece 21 has a top plate 2.
An inverted mountain-shaped contact 21b is formed with the apex at the intermediate part between the base connected to the base 20 and the free end 21a. The front end portion of the movable contact piece 21 is fixed by a presser piece 20b extending forward. Then, the contact point 21b of the movable contact piece 21
A mating insertion contact terminal is inserted between the elastic contact portion 16 of the bottom plate 17 and the elastic contact portion 16 of the bottom plate 17.

Further, the upper part of the side plate 19 is raised higher than the top plate 20, and the tip of the fold 19a folded downward in an inverted U shape is in contact with the top plate 20. The end of the top plate 20 is connected to the side plate 19.
It is provided in and engages with the notch hole 19b. In addition,
Reference numeral 20c indicates a convex portion that bulges out from the top plate 20 into the connecting portion 12 in order to prevent excessive deformation of the movable contact piece 21.

Before the connection terminal 11 is bent and formed, it is punched out of a single conductive metal plate into a shape as shown in FIG. There, there is a bottom plate 17 having an elastic contact portion 16, side plates 18 and 19 connected to both left and right sides of the bottom plate 17, a top plate 20 connected to one side plate 18, and a connecting piece 22 extending laterally from the front end of the top plate 20. A movable contact piece 21 is formed which is continuous through the movable contact piece 21 .
Further, a core wire crimping part 14 and a covering crimping part 15 are formed at the rear of the bottom plate 17 and both side plates 18 and 19. A notch hole 20a is formed at the rear of the top plate 20, a pressing piece 20b is provided at the front of the top plate 20, and a projecting piece 20d is formed at the side of the top plate 20. A fold 19a that is folded back onto the top plate 20 is provided on the side of the side plate 19, and a cut hole 19b is formed in the fold 19a. Note that the dotted line indicates a bent portion.

In order to form the connection part 12 from the conductive metal plate punched out in this way, first, as shown in FIG. A contact point 21b is formed, and the movable contact piece 21 is overlapped with the top plate 20 by folding back the middle part of the connecting piece 22, and the free end 21a of the movable contact piece 21 is fitted into the notch hole 20a of the top plate 20. At the same time, the front end portion of the movable contact piece 21 is fixed by folding back the holding piece 20b extending from the top plate 20.

Next, the side plates 18 and 19 on both the left and right sides of the bottom plate 17 are bent inward, and the top plate 20 connected to the side plates 18 is further bent inward together with the movable contact piece 21.
The protruding piece 20d of the top plate 20 is inserted into the notch hole 19b of the side plate 19.
The upper end portion 19a of the side plate 19 is folded back into a substantially U-shape, and its tip abuts against the top plate 20. Note that the recess 20 of the top plate 20
c may be formed as appropriate during the above steps. Also,
To form the wire crimping part 13, the core wire crimping part 14 is
and bend the cover crimping portion 15 into a U-shape.

In the connection terminal 11 bent and formed in this way, the mating flat-blade-shaped insertion connection terminal (not shown) is connected to the elastic contact portion 1 of the movable contact piece 21 and the bottom plate 17.
6, but in that case, the elastic contact portion 16 is slightly elastically deformed, and the free end 21a of the movable contact piece 21 moves within the notch hole 20a, causing the movable contact piece 21 to undergo large elastic deformation. Therefore, the insertion connection terminal can be easily inserted. Also, at this time, the front end of the movable contact piece 21 is pressed down from above by the holding piece 20b of the top plate 20,
This will not cause any obstruction when inserting the mating connection terminal.

When the insertion connection terminal is inserted, the bottom plate 17
The insertion connection terminals are strongly pressed together by the elastic pressing force of both the elastic contact portion 16 and the movable contact piece 21, and a good conductive connection between the connection terminals can be obtained.

In the embodiment described above, the elastic contact portion 16 is provided on the bottom plate 17.
Although the elastic contact portion 16 is not necessarily required, a sufficient conductive connection can be obtained by inserting an insertion terminal between the flat bottom plate 17 and the movable contact piece 21. Furthermore, the presence or absence of the convex portion 20c, the position and shape of other locking members, etc.
It goes without saying that various changes can be made in addition to the embodiments.

[Effects of the Invention] As explained above, the connection terminal according to the present invention has the following effects:
The movable contact piece and the holding piece are connected to the top plate and punched out, the movable contact piece is folded back onto the top plate, and then the holding piece is folded back onto the movable contact piece, so the movable contact piece can be firmly attached to the top plate during bending and forming. At the same time, it becomes possible to assemble efficiently, and furthermore, it is possible to reduce waste in material removal.

[Brief explanation of the drawing]

Drawings 1 to 5 show one embodiment of the connection terminal according to the present invention, in which Fig. 1 is a perspective view, Fig. 2 is a plan view, Fig. 3 is a longitudinal sectional view, and Fig. 4 is a perspective view. is a cross-sectional view, FIG. 5 is a plan view of the conductive metal plate in the unfolded state, FIG. 6 is a perspective view of the movable contact piece superimposed on the top plate, and FIGS. 7 and 8 are the conventional FIG. 3 is a plan view of the conductive metal plate in a state where the connection terminals of FIG. 11 is a connection terminal, 12 is a connection part, 13 is a wire crimping part, 17 is a bottom plate, 18 and 19 are side plates, 20
is the top plate, 20a is the cutout hole, 20b is the holding piece, 2
1 is a movable contact piece, 21a is a free end, 21b is a contact point, and 22 is a connecting piece.

Claims (1)

[Claims] 1. A connection terminal in which a single conductive metal plate is punched and formed, and a square tube-shaped connection part is provided at the front for electrical connection with the mating insertion connection terminal, and a wire crimping part for connecting the electric wire is provided at the rear, The connection portion includes a bottom plate;
Two side plates raised from both sides of the bottom plate, a top plate further bent horizontally from one of the side plates, and connected to the sides of the top plate via a connecting piece, and the connecting piece is folded back. and a movable contact piece that is superimposed on the inside of the top plate and fixed to the top plate by folding back a presser piece extending on the front end of the top plate, the movable contact piece facing inward. The contact piece is formed into an inverted mountain shape, and its rear free end is locked in a notch hole provided in the top plate, and the mating insertion connection terminal is inserted between the movable contact piece and the bottom plate. A connection terminal characterized by: