JPS642373Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a notch structure provided on the wire crimp portion of a crimp type contact.

Crimp-type contacts used in connectors are usually punched out of an elastic metal plate and press-molded as shown in FIG. 1, and a connection section consisting of an electric wire crimping section 1 and a covering crimping section 2 is electrically connected by crimping the electric wire. The wire is crimped in the wire crimping section 1 by wrapping the inserted wire 3 together with the lower portion 12 inwardly by a pair of opposing side walls 11, 11', as shown in FIG. Conventionally, considering the rolling curvature, if the material is relatively thick, it is difficult to wrap it inward and crimping is difficult, so the same plate thickness is used at the expense of crimpability, or the plate thickness is increased by two or three steps. However, deformed materials had high material costs and were uneconomical. Furthermore, as devices have become smaller in size, the winding curvature has become smaller and smaller, making it difficult to crimp small contacts using jigs.

Therefore, the present invention was created with the aim of eliminating the above-mentioned drawbacks, and it has good crimping properties even when thick material is used without using irregularly shaped materials, and the work can be easily performed. It is.

The present invention is a crimp-type contact that electrically connects electric wires by crimping, and has a contact notch structure in which multiple notches with different groove depths are provided on opposing side walls of the wire crimping part. The feature is that the crimping can be performed reliably without any damage.

The present invention will be described below using examples with reference to the drawings. FIG. 3 shows an embodiment of the wire crimping part of the present invention. Notches 13 having different depths of grooves parallel to the wire insertion direction (arrow direction) are formed on opposite side walls 11 and 11' of the wire crimping part 1. A plurality of these are provided at regular intervals. side wall 11,1
The end surfaces 11a, 11a' of the cylindrical member 1' are pressed so as to be tapered. FIG. 4 shows a partial cross section of the wire crimping part, in which a notch ₁₃ , which is a groove with a depth _t1 , is provided in a side wall 11 having a thickness t0. In other words, the thickness of the plate at the notch 13 is t ₀ - _{t 1} , and if this is set as t ₂ , then the plate with thickness t ₀ has a moment of inertia of area with thickness t ₂ , and has an apparent thickness of t ₂ . You will get a similar effect. Further, providing a notch in the metal plate has the advantage of increasing flexibility during crimping, which generates concentrated stress at the notch. In the wire crimping part shown in FIG.
Notches 1 arranged from the a' side to the lower part 12 side
The depths of grooves 3 and 13' are made shallower in sequence.
When a wire is crimped to the wire crimping part having such a structure, the wire crimping part starts to bend from the notch part where the groove is deep, that is, from the end surfaces 11a, 11a' of the side walls 11, 11'. Start by winding up the wires and crimping them. The depth of the groove of the notches 13, 13' is formed to be shallower toward the lower part 12, and the rigidity of the side wall on the lower part 12 side is greater. 12
This has the effect of preventing the sides from opening outward. Also, Figure 5b
Notches 13, 1 formed in the wire crimping part shown in
3' is the notch 13 of the wire crimping part shown in FIG. 5a,
13', the end surfaces 11a, 13' of the side walls 11, 11'
The depth of the groove is gradually increased from the 11a' side toward the lower part 12. The wire crimping section having the structure shown in FIG. 5b is effective when used for connecting wires having a large outer diameter. When crimping and connecting electric wires having a large outer diameter, it is necessary to form a large opening angle between the side walls 11 and 11'. When the opening angle between the side wall 11 and the side wall 11' increases, in the wire crimping process,
Before the end faces 11a, 11a' of the side walls 11, 11' are bent and winding of the electric wire begins, the intermediate portions of the side walls 11, 11' may be bent inward. Therefore, if a notch structure is used as shown in Figure 5b,
Since the side walls 11, 11' tend to curve in the portions near the lower portion 12, when crimping is started with the crimping tool, the opening angle of the side walls 11, 11' gradually becomes smaller.
Furthermore, as the crimping process progresses, the side walls 11, 11' wrap around the electric wires and crimp them along the crimping curved surface of the crimping tool, so that the intermediate portions of the side walls 11, 11' do not bend due to buckling deformation. Lower part 1 of wire crimping part
Although the rigidity of the side walls 11, 11' on the second side is smaller than that of the structure shown in Fig. 5a, the rigidity of the side walls on the end faces 11a, 11a' side is large, so after crimping is completed, the electric wire should be tightly wound and connected. I can do it. In this embodiment, notches 13, 13' are provided inside the side walls 11, 11' of the wire crimping part 1, but the notches 13, 13' are provided inside the side walls 11, 11'
The same effect can be obtained even if the notch is provided on the outside of the side wall 1', or the notch is provided on the inside and outside of the side wall, shifted by half a pitch.

As described above, the notch structure of the contact according to the present invention is achieved by providing a plurality of notches parallel to the stretching direction of the wire to be crimped on the inside or outside of the side wall of the crimping part of the contact, and having grooves of different depths. It is possible to change the thickness of the upper plate, lowering the moment of inertia of area and increasing flexibility. Even with thick plates, the same effect as thinning the plate by the depth of the groove can be obtained. Therefore, it is possible to easily crimp even thick materials and small contacts without using irregularly shaped materials as in the conventional method, which has an extremely excellent effect.

Although the above description has been made using a specific embodiment, the present invention is not limited thereto, and includes various design modifications within the scope of the present invention, such as application to the crimp portion of a pin contact.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional contact; Figure 2 is a perspective view of a conventional contact;
The figure is a sectional view showing the crimping part, FIG. 3 is a partial perspective view showing an embodiment of the present invention, showing the wire crimping part, and FIG. 4 is a partially enlarged view showing the principle of the present invention.
FIGS. 5a and 5b are enlarged sectional views of the wire crimping part of the embodiment of the present invention. 1...Wire crimping part, 11, 11'...Side wall, 1
2...low part, 13...notch, 3...electric wire.

Claims (1)

[Scope of utility model registration request] In a crimp-type contact that electrically connects electric wires by crimping, a plurality of notches extending parallel to the stretching direction of the wire to be crimped are arranged on opposing side walls of the wire crimping part, and the depth of the groove of each notch is The notch structure of the contact is characterized by different characteristics.