JPS628128Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is based on a round socket contact having a cantilevered contact spring piece, by forming the other cylindrical part except the contact spring part so as to have an annular constriction. The present invention relates to a round socket contact having a structure to prevent excessive deformation, in which the overall length of the contact spring piece is shortened and the free end of the contact spring piece is formed to fit inside the inner edge of the cylinder.

Conventionally, in the case of round socket contacts that are formed by rolling a plate material, the cantilever contact spring piece, which is provided by punching out a part of a cylinder, is insufficient in both thickness and width, making it weak in strength and difficult to fit the connector. When the mating pin contact enters obliquely during detachment and the spring piece is strained, the spring piece is greatly deformed and exceeds its elastic limit and does not return to its original position, making it impossible to obtain an appropriate contact force.

This invention was made in order to improve the above-mentioned drawbacks, and it forms a stopper for preventing excessive deformation of the contact spring piece without using an auxiliary member.

Next, an embodiment of this invention will be described based on the drawings. FIGS. 1A, 1B and 1C are three side views of the socket contact 1 of this embodiment, in which two annular constrictions 13 are provided in the cylindrical portion 12 excluding the contact spring piece 11. The tip 111 of the contact spring piece 11 enters into the cylinder as shown by the broken line in FIG. 1b, and its end overlaps with the inner edge of the cylinder. FIG. 1d is a longitudinal sectional view of the socket contact 1, and FIG. The lower end 112 of the contact spring piece 11 has an arcuate shape, and the cylindrical inner edge 14 that receives this portion is also crushed to form a recess, which is provided as necessary. Figure 2 shows the shape of the blank before the actual socket contact was formed. After the contact spring piece 11 is formed as shown in FIG. . Thereafter, by forming a cylinder, the socket contact 1 shown in FIG. 1 is obtained. If the amount of shrinkage is not so large, the contact spring piece 11 may be removed by punching out only both sides of the spring piece 11 and shearing it at the positions indicated by broken lines, as shown in FIG. 2b. FIG. 3 is a cross-sectional view of the pin contact 2 inserted into the socket contact 1, in which the lower end 112 of the contact spring piece deforms toward the cylindrical inner edge 14 and exerts the restoring force of the spring on the pin contact 2, causing the pin Contact spring piece 1 receives contact 2 on the opposite side
1 is the bottom 131 of the annular constriction 13 mentioned above.

FIG. 4 shows another example.
FIG. 5 shows another embodiment in which the free end of the contact spring piece is oriented in the opposite direction to that of the previous example.
In addition, it is also possible to use a plurality of contact spring pieces, to extend the annular constriction to the outside, or to deform both the inside and outside.

The present invention has the above configuration, but in order to improve the drawback that the socket contact having a cantilever type contact spring piece is easily deformed by prying due to misalignment when inserting and removing the mating pin contact,
By providing an annular constriction in the part other than the contact spring piece, the cylindrical part is shortened and the inner edge of the cylinder functions as a stopper when the contact spring piece is excessively deformed.
This is extremely advantageous because it can be formed entirely by pressing only without using any other auxiliary members.

[Brief explanation of the drawing]

Figure 1 shows a front view of the socket contact of the present invention, b a bottom view, c a side view, d a vertical sectional view, and e
FIG. Fig. 2a is a blank view of the socket contact shown in Fig. 1 before molding, Fig. 2b is an example of how the contact spring piece is taken when blank, and Fig. 3 is a cross section of the socket contact of the present invention with a pin contact inserted. figure. FIG. 4 is a sectional view of an example in which the annular constriction is widened, and FIG. 5 is a sectional view of an example in which the direction of the contact spring piece is opposite to that of the above example. DESCRIPTION OF SYMBOLS 1... excessive deformation prevention contact, 2... mating pin contact, 11... contact spring piece, 12... cylindrical part, 13... annular constriction, 14... cylindrical inner edge,
111...Tip of contact spring piece.

Claims (1)

[Scope of utility model registration request] In a round socket contact having a cantilevered contact spring piece, an annular constriction is provided in the cylindrical portion excluding the contact spring piece, and the free end of the contact spring piece enters into the inner edge of the cylinder, and the inner edge of the cylinder engages the stopper of the contact spring piece. A round socket contact with a structure that prevents excessive deformation.