JPS5832226Y2 - connector terminal - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a connector terminal formed by fixing metal contact members used in various connectors.

Conventional connector terminals include those in which the contact part of the terminal member is bent into a semicircular shape and precious metal plating is applied to the entire terminal or only the contact part, and the contact part of the terminal member bent into a semicircular shape. Some have a structure in which a hemispherical metal contact member is welded to the part.

The former type of button has the disadvantages of uneconomical plating of precious metals or technical difficulties and poor productivity of selectively plating only the contact parts with precious metals, so the latter type of button in which the metal contact members are individually provided is generally used. ing.

However, with the latter connector terminal, another problem that does not occur with the former connector terminal is that when the connector to be connected is fitted into the plug part, the contact of the connector to be connected directly contacts the contact member having a small curvature. Therefore, a great deal of pressure is required when inserting it.

The present invention was made to eliminate all the disadvantages of the above two types of connector terminals, and by improving the structure of the plug part of the terminal member, the advantages of the individual arrangement of the metal contact members are taken advantage of. It is an object of the present invention to provide a connector terminal in which a contact of a connector to be connected can be easily inserted without damaging it.

The present invention provides a connector terminal in which a contact member that contacts an inserted contact is fixed to a plug part bent into a predetermined shape, and a recess is provided at the apex of the plug part, and the recess is provided with a recess. It is characterized in that the contact member is fixed and the contact surface of the contact member is located on the circumference of the plug portion.

This will be explained below with reference to the drawings.

Fig. 1 is a perspective view showing an example of a commonly used connector, Fig. 2 is a sectional view taken along line A-A shown in Fig. 1, and Fig. 3 is a conventional connector terminal in contact with a to-be-connected object. FIG. 3 is a diagram showing a state in which a child is inserted (only one connector terminal is shown).

The buttons in each figure are 1: housing, 2: connector terminal, 2
3 is a metal contact member welded to the plug part 2a of the connector terminal 2; 4 is a groove for fixing the terminal; 5 is a contact of the connector to be connected; 5a is a contact The chamfered portions of child 5 are shown.

As shown in Fig. 3, the plug part 2 is bent into a semicircular shape.
When inserting a contact 5 to be connected into a connector terminal 2 formed by welding a hemispherical metal contact member 3 to a, the chamfered portion 5a of this contact 5 directly contacts the metal contact member 3 having a small curvature. While moving in the direction of arrow X.

FIG. 4 is a view showing an embodiment of the connector terminal of the present invention, and shows a state in which a contact of a connector to be connected is inserted.

In this figure, 2b indicates a recess provided in the plug part 2a, and other symbols have the same names as in FIG. 3.

As shown in Fig. 4, the plug part 2 is bent into a semicircular shape.
A recess 2b is formed at the apex of a, and a metal contact member 3 is welded to this recess 2b, and the tip of the metal contact member 3 approximately coincides with the circumference R that is formed by bending the plug part 2a. The connector terminal 2 is configured so as to.

As a result, in the process of inserting the contact 5 of the to-be-connected connector between the connector terminals 2, the chamfered portion 5a provided on the contact 5 is cut into the plug portion 2a of the connector terminal 2, which has a large curvature.
The vehicle rides on the vehicle and moves forward in the direction of arrow X.

An embodiment of the connector terminal according to the present invention and an example of the configuration of the conventional connector terminal have been described above, and the connector terminal configured as in the present invention facilitates insertion of the contact of the connector.

In other words, the ability to reduce the insertion force will be supplemented below with reference to FIGS. 5 and 6.

When the contact 20 to be connected is inserted into the connector terminal contact portion (hemispherical contact member or plug portion) 10 having a radius of curvature r, as can be understood by referring to FIG.
Contact pressure PIIi Component force P in the normal direction acting parallel to the Y-axis
r and a component force Pe in the contact direction.

Furthermore, the force (insertion force) F for inserting the contactor 20 acts in parallel to the X axis, and a component force Fr in the normal direction and a component force F in the tangential direction.
e exists.

Here, if μ is the coefficient of friction between the connector terminal contact portion 10 and the contact 20, and θ is the angle formed by the normal to the Y axis (contact insertion angle), then there is a distance Fθ−Pθ=p ( F, r+P r ) holds true.

This relational expression is Fcosθ−Psinθ=μ(Fsinθ
+P cos θ), which can be rearranged as follows.

Thereby, the insertion force F of the contactor 20 with respect to the connector terminal contact portion 10 that affects the radius of curvature r, that is, the insertion angle θ can be determined.

In addition, in equation (a), the insertion angle θ is from O to tan-1-
! It is an increasing function that can take values μ between -.

Next, each connector terminal contact portion 10 has a radius of curvature r1
and F2 (rl<F2), the contact 2 required
The insertion forces F1 and F2 of 0 will be explained with reference to FIG.

In this case, the final contact force between the connector terminal contact portion 10 and the contact 20 should be the same regardless of the radius of curvature (i.e., even if the radius of curvature is increased and the insertion force is decreased, the final contact force will be the same regardless of the radius of curvature). Therefore, the contact pressure P in the above equation 1aa) is assumed to be constant.

That is, as shown in FIG. 6, the radius of curvature r1. r2 In either case, the contactor 20 must be inserted into the contact portion 10 at a position on line a and have a final contact position on line b.

Therefore, the insertion force in the case of the contact portion 10 with the radius of curvature r1 and the insertion force in the case of the contact portion 10 with the radius of curvature r2 are as follows.

Here, each contact insertion angle θ1. Paying attention to θ2, as is clear from the figure, since the relationship between the two is θ1>θ2, the insertion force F1 is greater than the insertion force F□2.

In other words, the larger the curvature of the connector terminal contact portion 100, the easier it is to insert the contact 20.

As explained above, the present invention has been developed by configuring the connector terminal so that the contact surface of the thin metal contact material is arranged on the circumference of the plug part that has been bent into a predetermined shape. Connector contacts can be easily inserted without sacrificing the advantages of individual arrangement.

In addition, the connector terminal according to the present invention allows the bending of the plug part and the concave part for arranging the contact member to be easily formed using a press process from two sheets of material, and furthermore, the thickness of the plate in all parts is made uniform. The configurability also facilitates setting the mechanical stresses required for contact action.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a commonly used connector, Figure 2 is a sectional view taken along the line A-A shown in Figure 1, and Figure 3 is a conventional connector terminal connected to a connector. FIG. 4 is a diagram showing an embodiment of the connector terminal of the present invention, and FIGS. 5 and 6 are diagrams showing how the contact of the connector to be connected is inserted into the connector terminal contact portion. It is a figure explaining the relationship between the curvature of a connector terminal contact part and contact insertion force in the case of insertion. 1...Housing, 2...Connector terminal, 2a...
・Connection part, 2b... recessed part, 3... metal contact member, 4
...Groove for terminal fixing, 5...Contact of connector to be connected, 5a...Chamfer of contact.

Claims (1)

[Scope of utility model registration request] In a connector terminal in which a contact member that contacts an inserted contact is fixed to a plug part bent into a predetermined shape, a recess is provided at the apex of the plug part, and the contact member is fixed to the recess. A connector terminal characterized in that the contact surface of the contact member is located on the circumference formed by the plug portion.