JPS5852308B2 - terminal fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a female terminal used in electrical wiring connectors for automobiles and the like.

Conventionally, this type of terminal is known as shown in FIG.

In other words, a female terminal 2 is mounted inside a plastic Nouji Puffer 1, and by inserting a male terminal 3 into this female terminal, a conductor 4 connected to the female terminal is connected to the male terminal. The conducting wire 5 is electrically connected.

The female terminal as a whole is provided with an electrical connection portion 2a for connecting a conductive wire 4 to the rear end portion of a terminal body 2 made of a roughly rectangular conductive metal plate.

Further, both eye parts 3 at the center of the terminal body are bent along the longitudinal direction of the terminal body to form gripping parts 7, 7 which slide into contact with the male terminal 3.

Furthermore, the tip 8 of the flat plate part 6 located in front of the terminal body is folded back toward the surface of the flat plate part 6 as shown in FIG. 1B, and this folded tip part 8 has a male terminal 3
A protrusion 10 that engages with the locking hole 9 is provided in a protruding manner.

Therefore, after inserting the male terminal into the female terminal as described above, if a large pulling force is applied in the direction A for some reason, the tip 8 will rise in the direction of the mouth and be separated from the surface of the flat plate 60, and the tip A strong stress may be concentrated on the folded portion 11 of 8, causing it to break and break, and furthermore, there is a risk that the ends of the conductors 4 and 5, which are connected to both terminals 2 and 3, respectively, may break and become stuck. .

Even if the pulling force is canceled midway through, plastic deformation will occur at the tip, making electrical contact more likely to occur.

The object of the present invention is to provide a female terminal that overcomes the above-mentioned drawbacks.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 2 to 5.

In this embodiment, the same parts as in the conventional example are given the same reference numerals to simplify the explanation.

A terminal 13 according to the invention is supported in a plastic housing 12 via a support arm (lance) 12a of the housing.

Further, in this housing 12, a slit 15 is cut in the clay wall of the terminal storage chamber 14, thereby forming an operating piece 16 that can be elastically deformed in the vertical direction.

The female terminal 13 according to the present invention has a connecting portion 17 for connecting the conductive wire 4 at the rear end of the terminal body made of a conductive metal plate having a generally rectangular shape, and a connecting portion 17 for connecting the conductor 4 to the terminal body. Both side edge portions are bent toward the surface of the terminal body along the longitudinal direction of the terminal body to form a pair of clamping portions 18, 18.

Furthermore, a pair of guide pieces 20 and 20 are formed near both ends of the flat plate portion 19 of the terminal body in the width direction (width direction of the terminal body), respectively, and are cut and raised toward the back side.

Among the downwardly extending edges of both guide pieces 20, 20, the edges on the rear side of the terminal body are inclined edges 2Qa, 2 which are inclined toward the front side of the terminal body as shown in the figure.
0a, thereby giving an appropriate inclination angle θ for guiding.

On the other hand, the tip portion 21 of the flat plate portion 19 of the terminal main body has a width d smaller than the width of the flat plate portion 190, and has a pair of rectangular protrusions at mutually corresponding positions at both ends in the width direction. The horizontal plates 22 and 22 are provided, and the distal end portions 21 are bent toward the back surface of the flat plate portion 19 so as to form a slightly larger bent portion 23, and are overlapped with each other.

In addition, in this state, the rain horizontal plate 22.22 has an edge 22a which is on the front side of the terminal body among the edges of the rain horizontal plate 22.22.

22a is the inclined edge 2Qa of both the guide pieces 20, 20;
, 20a, respectively.

Notch holes 24 and 25 are bored in the housing, the center portion of the terminal body, and the flat plate portion 19, and one of the notch holes 24 and 25 has a tip portion 21
A projecting piece 21a formed by bending the end of the notch at a substantially right angle protrudes, and in the other notch hole 25, a protrusion 26 cut and raised at the tip 21 projects upward from the surface of the notch hole 250.

The length of the protrusion 26 projecting from the surface of the notch hole 25 and the length h2 of the guide piece 20 are set to have a relationship of hl<h2.

However, when the male terminal 3 is inserted into the female terminal 13 from the direction of arrow C, the protrusion 2 of the tip 21 of the female terminal 13 will fit into the locking hole 9 drilled at the tip of the male terminal.
6 are engaged, and the male terminal 3 is connected to the flat plate portion 190.
It is elastically supported between the surface and the clamping part 18.

On the other hand, if you want to release the engagement between the female terminal and the male terminal, press the operating piece 16 in the direction of arrow E in FIG.
If the protrusion 21a at the end of the tip 21 is pushed down,
The engagement between the protrusion 26 and the locking hole 9 is released.

By the way, when a male terminal is inserted into a female terminal, a large pulling force is applied between these terminals in the direction of A for some reason. In this case, the tip 210 and both horizontal plates 22 , both edges 22a,
22a to the inclined edges 20a, 20 of both guide pieces 20.20.
Since they are each integrally guided along a, the tip 2
1 is slightly displaced in the direction of arrow A.

The amount of displacement of the tip portion 21 is elastically absorbed by the bent portion 23.

In addition, when a larger pulling force is applied in the direction of arrow A, that is, a larger pulling force close to the breaking load of the conductors 4 and 5, the rain horizontal plates 22 and 22 move toward the inclined edge 20.
Since it is largely displaced obliquely downward along lines a and 20a, the engagement between the protrusion 26 and the locking hole 9 is released, thereby protecting the conductors 4 and 5, and also preventing the housing protrusion 26 from being damaged by shearing. .

In addition, in the above embodiment, the inclination angle θ is determined as appropriate depending on the coefficient of friction between the inclined edge 20a and the edge 22a of the horizontal plate 22, the breaking load of the conductors 4 and 5, etc. .

As detailed above, the present invention includes bending the tip end of the flat plate part of the female terminal body toward the back surface of the flat plate part, overlapping them, and punching a cutout hole in the flat plate part.
and a protrusion protruding from the notch hole is formed on the tip, and a pair of horizontal plates are formed protruding from both ends in the width direction of the tip, and a pair of horizontal plates are formed on the flat plate portion to guide the rain horizontal plates obliquely downward. Since a guide piece is formed and the length h2 of both guide pieces is set larger than the protrusion length h1 of the protrusion, even if a large external force is applied to pull out the male terminal, the tip part will not touch the horizontal plate. This is allowed by diagonally downward displacement due to the action of the guide piece, and the amount of displacement of the callus is absorbed by the bending part, so there is no possibility that the tip would be deformed or the protrusion would be destroyed like in the past. Never.

In particular, in this invention, when a large pulling force close to the breaking load of the conducting wire is applied, the engagement between the protrusion and the locking hole is released, so that the conducting wire itself is protected, and various other excellent effects are achieved.

[Brief explanation of drawings]

Fig. 1 shows a conventional example, Fig. 1A is a perspective view explaining the configuration, Fig. 1B is an explanatory view when the connection of the contact is forcibly released, and Figs. 2 to 5 The drawings show an embodiment of the present invention, in which Fig. 2 is an exploded perspective view, Fig. 3 is a plan view, Fig. 4 is a sectional view taken along the fV-fV line in Fig. 3, and Fig. 5
The figure is a perspective view of the terminal body. 3...Male type terminal, 13...Female type terminal, 19...
- Flat plate part, 20... Guide piece, 20a... Inclined edge part, 21... Tip part, 22... Horizontal plate, 24, 25.
...Notch hole, 26...Protrusion, hl...Protrusion length,
h2...Length.

Claims (1)

[Claims] 1. A wire connection part is provided at the rear of the conductive metal plate, and both edges of the central part of the metal plate are bent toward the surface of the metal plate along the longitudinal direction of the metal plate to form a male terminal. In a terminal fitting in which a pair of gripping portions that come into sliding contact are formed, and the tip portion of a flat plate portion located at the front of the metal plate is folded back, the tip portion 21 of the flat plate portion 19 of the metal plate is folded back. The flat plate part is bent toward the back surface and overlapped, and a notch hole 25 is formed in the flat plate part, and the metal plate is cut at a position on the rear side of the metal plate relative to the clamping part. A notch hole 24 is formed, and a protrusion 26 is formed at the tip end to protrude from the surface of the notch hole 25 of the flat plate part with a projecting length h1. A protruding piece 21a is formed by bending so as to protrude from the surface of the notch hole 24 formed at the rear position,
On the other hand, a pair of horizontal plates 22 are formed protruding from mutually corresponding positions on both widthwise ends of the tip part, and on the other hand, the flat plate part has an inclined edge 20a that guides the rain horizontal plate obliquely downward.
A pair of guide pieces 20 are formed in a protruding manner, and the length h2 of both guide pieces is equal to the protrusion length h of the protrusion.
1. A terminal fitting characterized by being set larger than 1.