JPH0955236A - Crimp contact - Google Patents

Abstract

(57) [Abstract] [Problem] Electric wires can be easily used without using a crimping tool.
In addition, the present invention provides a crimp contact that can be connected with increased reliability. An electric wire crimping portion includes a cylindrical socket portion 31 formed at one end of a contact body 32, and a U-shaped clip 33 that is fitted into the socket portion 31 with the electric wire terminal portion being sandwiched. The clip 33 is formed by bending a strip-shaped metal plate having a spring property into two, and the leg portion 33b facing the clip 33 has the core portion 11 of the electric wire 1.
It is characterized in that a core wire pressing projection 35a that bites into the cover and a coating pressing projection 36a that bites into the coating portion 12 are provided in a protruding manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crimp contact which is crimp-connected to an end portion of an electric wire having a core wire exposed by removing a coating.

[0002]

2. Description of the Related Art Conventionally, this type of crimp contact is generally known in which an electric wire crimp portion shown in FIG. 4 is formed on one end side. That is, FIG. 4A is a perspective view showing the electric wire crimping portion, and FIG. 4B is a perspective view showing a state where the electric wire is crimped to the electric wire crimping portion. The electric wire 1 includes a core portion 11 and a coating portion 12 that covers the core portion 11. On the other hand, the crimp contact 2 is formed by pressing a single conductive metal plate to provide a contact portion (not shown) on the front end side that comes into contact with the mating contact, and has a U-shaped cross section on the rear end side. An electric wire crimping portion 23 composed of a wire-shaped insulating coating crimping portion 21 and a core wire crimping portion 22 is formed.

Next, when crimping the electric wire 1 to the electric wire crimping portion 23 of the crimping contact 2, first, the covering portion 12 at the end portion of the electric wire 1 is removed to expose the core wire portion 11 by a predetermined length. The core wire portion 11 is positioned inside the core wire crimping portion 22, and the covering portion 12 is positioned at the insulating coating crimping portion 21. Then, a pressing force is applied to the wire crimping portion 23 using a crimping tool to crimp the insulating coating crimping portion 21 and the core wire crimping portion 22 in an arc shape inward as shown in FIG. 4B. Therefore, the crimp contact 2 is mechanically and electrically connected to the electric wire 1 in a state where the tip portions of the core wire crimping portion 22 and the insulating coating crimping portion 21 are embedded in the core wire portion 11 and the covering portion 12, respectively.

[0004]

However, in the crimp contact 2 described above, the electric wire 1 is formed by using the crimping tool.
Since it is configured to be crimped and connected, a crimping tool must be prepared each time crimping work is performed, which is very inconvenient. Further, when a manual crimping tool is used, the electric wire crimping portion 23 is plastically deformed, so that the electric wire crimping portion 23 must be operated with a strong force, resulting in poor workability. Further, the plastically deformed portion of the wire crimping portion 23 is easily deteriorated, and therefore, the caulking strength becomes weaker with the passage of time and the reliability is poor. Therefore,
The present invention has been made in order to solve the above-mentioned drawbacks, and provides a crimp contact capable of easily and reliably connecting an electric wire without using a crimping tool.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides a crimp contact having an electric wire crimping portion on one end side for crimping and connecting an electric wire terminal portion having a core wire portion exposed by removing a coating, the electric wire crimping portion being one end of a contact body. And a U-shaped clip that is inserted into the socket portion with the electric wire terminal portion being sandwiched, and the clip includes two strip-shaped metal plates having spring properties. It is formed by bending the wire into a pair, and the leg portions facing each other are provided with a core wire pressing projection that bites into the core wire portion of the wire end portion and a coating pressing projection that bites into the covering portion. When connecting an electric wire to the crimp contact of the present invention configured as described above, the clip inserts the electric wire end portion between the leg portions, and then the leg portion is elastically deformed and fitted into the socket portion of the contact body. To be done. As a result, the clip is fitted into the socket portion with the core wire pressing projection in the core wire portion and the cover pressing projection in the cover portion, and connects the electric wire to the contact body. In this way, the crimp contact is connected to the electric wire without using a crimping tool, so that it is not necessary to arrange the crimping tool during crimping work. Further, since it is not necessary to plastically deform the wire crimping portion, there is no fear that the caulking force will be weakened due to deterioration of the wire crimping portion as in the conventional example, and a crimping contact with improved reliability can be obtained.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an exploded perspective view of an electric wire crimping portion of a crimp contact of the present invention, which is shown together with an electric wire connected thereto. The crimp contact 3 is formed by pressing a conductive metal plate to form a contact portion (not shown) that comes into contact with a mating contact on the front end side, and a contact body 32 having a cylindrical socket portion 31 on the rear end, and a socket. Part 3
It is composed of a clip 33 which is fitted in the terminal 1 with the end portion of the electric wire 1 sandwiched therebetween, and the socket portion 31 and the clip 33 constitute an electric wire crimping portion 34.

The clip 33 is formed by bending a strip-shaped conductive metal plate into two and is formed in a U-shaped cross section. The clip 33 has legs 33b, from both ends of the curved portion 33a which is the closed end side.
33b is extended. Step portions 33c and 33c are provided at substantially middle positions in the extending direction of the leg portions 33b and 33b, and the curved portion 33a is bordered by the step portions 33c and 33c.
A core wire insertion portion 35 into which the core wire portion 11 of the electric wire 1 is inserted is provided between the side leg portions 33b, 33b, and the leg portion 33 on the opening end side is formed.
The coating insertion portion 36 into which the coating portion 12 is inserted between b and 33b.
It has become. The core wire insertion portion 35 has core wire pressing projections 35a, 35a that face each other and project inwardly at positions near the stepped portions 33c, 33c of the leg portions 33b, 33b.
Over the entire width of the stepped portions 33c, 33c
The engaging projections 35b, 3 are provided at a substantially intermediate position between the curved portion 33a and the curved portion 33a.
5b is projected outward. The covering insertion portion 36 has covering pressing protrusions 36a, 36a that face each other and project inwardly in the vicinity of the open ends of the legs 33b, 33b.
3b is formed over the entire width of
Hemispherical engaging projections 36b, 36b are provided outwardly at positions slightly displaced from the steps 6a, 36a toward the steps 33c, 33c. Incidentally, the core wire pressing protrusions 35a, 35a
Is set to be slightly larger than the outer diameter of the core wire portion 11, and the distance between the tips of the covering pressing protrusions 36a and 36a is set to be slightly larger than the outer diameter of the covering portion 12. There is.

On the other hand, the socket portion 31 on the side of the contact body 32 into which the clip 33 is fitted has a covering fixing portion 31a where the covering inserting portion 36 of the clip 33 is located and a core wire fixing portion 31b where the core wire inserting portion 35 is located. The cover fixing portion 31a and the core wire fixing portion 31b are the contact main body 32.
Are integrally formed in a square tubular shape in order from one end side. Engagement holes 31d and 31d that engage with the engagement protrusions 36b and 36b on the sheath insertion portion 36 side of the clip 33 are provided in the upper and lower wall portions of the sheath fixing portion 31a, and the core wire is provided in the upper and lower wall portions of the core wire fixing portion 31b. Engagement holes 31e, 31e that engage with the engagement protrusions 35b, 35b of the insertion portion 35 are respectively provided so as to penetrate therethrough.

Next, when connecting the electric wire 1 to the crimp contact 3 having the above-described structure, first, as shown in FIG. 1, the covering portion 12 at the end portion of the electric wire 1 is removed to expose the core wire portion 11 for a predetermined length. At this time, the exposed dimension of the core wire portion 11 is determined by the core wire insertion portion 35.
Is set to be slightly smaller than the length. After that, electric wire 1
The end portion of the core wire is inserted into the clip 33, the cut end surface 12a of the covering portion 12 is brought into contact with the step portion 33c, and the core wire inserting portion 35
The core portion 11 is provided inside, and the covering portion 12 is provided inside the covering insertion portion 36.
Position. In this state, when the clip 33 is inserted into the socket portion 31 of the contact body 32 with the curved portion 33a side first, the core wire insertion portion 35 of the clip 33 passes through the covering fixing portion 31a and then to the core wire fixing portion 31b. The coating insertion portion 36 reaches the coating fixing portion 31a. When inserted, the leg portions 33b, 33b on the core wire insertion portion 35 side become the core wire fixing portion 31.
b on the upper and lower wall portions, and also on the cover insertion portion 36 side leg portions 33b,
Since 33b abuts against and is pressed against the upper and lower wall portions of the covering and fixing portion 31a, the leg portions 33b and 33b are elastically bent in a direction toward each other. This allows the legs 3
Core pressing protrusions 35a, 35a projecting from 3b, 33b
To the core wire portion 11 and the coating pressing projections 36a and 36a to the coating portion 12 to fix the wire end portion in the clip 33. Further, the clip 33 is pushed in, and the engagement protrusions 35b and 35b of the core wire insertion portion 35 are engaged with the engagement holes 3 of the core wire fixing portion 31b.
1e, 31e, and the engagement protrusion 36 of the coating insertion portion 36
b and 36b are engaging holes 31d and 31d of the covering fixing portion 31a.
, The clip 33 is fixed by the elastic return force of the legs 33b and 33b so that the clip 33 does not come out of the socket 31, and the electric wire 1 is connected to the socket 31 of the contact body 32 through the clip 33. To be done. Next, in another embodiment shown in FIG. 3A, only the core wire fixing portion 31b is provided in the socket portion 31 of the contact body 32, and the core wire insertion portion 3 of the clip 33 is provided as shown in FIG. 3B.
The wiring 1 is connected by inserting 5 and the above configuration is used when a load such as a tensile force applied to the connecting portion of the electric wire 1 is small.

[0010]

As is apparent from the above description, in the crimp contact according to the present invention, the clip into which the electric wire end portion is inserted is pushed into the socket portion of the contact body and elastically deformed, so that the clip is eaten into the electric wire end portion. The electric wire is connected to the contact body. Since the electric wire can be connected to the contact without using a crimping tool in this manner, the trouble of arranging the crimping tool during work is eliminated. Further, since the electric wire can be connected to the contact without plastically deforming the electric wire crimping portion, there is no fear of weakening the caulking force due to deterioration of the electric wire crimping portion as in the conventional example, and a crimping contact with increased reliability can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a crimped state of the contact of FIG.

3A is an exploded perspective view showing another embodiment of the present invention, and FIG. 3B is a sectional view showing a crimped state of the contact shown in FIG. 3A.

FIG. 4A is a perspective view showing a conventional example, and FIG.
Perspective view showing the crimped state of the contacts in the figure

[Explanation of symbols]

 3 Crimp contact 31 Socket part 31d, 31e Engagement hole 32 Contact body 33 Clip 33b, 33b Leg part 34 Electric wire crimp part 35a Core wire pressing protrusion 36a Coated pressing protrusion

Claims (1)

[Claims] 1. A crimp contact having an electric wire crimping portion on one end side for crimping and connecting an electric wire terminal portion whose coating is removed and whose core wire portion is exposed, wherein the electric wire crimping portion is formed on one end side of a contact body. And a U-shaped clip that is inserted into the socket portion while sandwiching the wire end portion, and the clip is formed by bending a strip-shaped metal plate having a spring property into two, A crimp contact characterized in that a core wire pressing projection that bites into the core wire portion of the electric wire terminal portion and a coating pressing projection that bites into the coating portion are provided on the opposing legs, respectively.