Female terminal

Details Female terminal Female terminal

1998-06-26

1999-11-02

Gellner, Michael L

Electrical connectors

Metallic connector or contact having movable or resilient...

Spring actuated or resilient securing part

439 83, H01R 1122

Patent

active

059759631

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

This invention relates to an improvement of a female terminal.


BACKGROUND ART

When, in order to secure a female terminal a to a mounting (inserting) hole c formed in a printed wiring board b, the board is dipped in a molten solder with a male-terminal inserting cylindrical portion d suitably locked, sometimes as shown in FIG. 4 the molten solder e on the edge of the mounting hole spreads to close the cylindrical portion d in a bridge-like form, and solidifies.
In view of the foregoing, an object of the invention is to provide a female terminal which is so designed in structure that the molten terminals will never close the male-terminal inserting cylindrical portion.


DISCLOSURE OF THE INVENTION

The foregoing object of the invention has been achieved by the provision of a female terminal which, with a male terminal inserting cylindrical portion thereof fixedly inserted in a mounting hole formed in a printed wiring board, is secured to the mounting hole; in which, according to the invention, recesses which are confronted with each other.
The above-described female terminal has at least a pair of notched recesses. Therefore, the molten solder 21, which otherwise spreads in a bridge-like form to close the cylindrical portion, is lowered in conformability; that is, its sticking force is decreased, so that it is dropped from the notched recesses. The remaining molten solder on the cylindrical portion is shifted towards the edges of the cylindrical portion except for the notched recesses by the surface tension thereof, and solidified. Therefore, the cylindrical portion, into which the male terminal is to be inserted, is not closed by the solder, yet the female terminal is fixedly mounted on the printed wiring board. This feature contributes to the improvement of productivity.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a female terminal 1, which constitutes a preferred embodiment of the invention.
FIG. 2. is a sectional view showing the female terminal 1 which is mounted on a printed wiring board.
FIG. 3 is a perspective view of a cylindrical portion of one modification of the female terminal of the invention.
FIG. 4 is a sectional view of a conventional female terminal.


PREFERRED EMBODIMENT OF THE INVENTION

A female terminal, a preferred embodiment of the invention, will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of the female terminal 1 according to the invention; FIG. 2 is a sectional view showing the female terminal 1 which is mounted on a printed wiring board; FIG. 3 is a perspective view of a cylindrical portion of one modification of the female terminal of the invention; and FIG. 4 is a sectional view of a conventional female terminal. The female terminal 1 is formed on a progressive press machine. That is, a conductive metal hoop material is punched into a part in a predetermined form, and the part thus obtained is bent. This bending work forms a vertically elongated cylindrical portion 2, into which a male terminal 10 is inserted.
The side surfaces 3 and 3 which are extended longitudinally in such a manner as to confront with each other, have clamping elastic pieces 4 and 4, respectively. The clamping elastic pieces 4 and 4 are formed as follows: That is, the clamping elastic pieces 4 and 4 have clamping portions 5 and 5 at the middle, and end portions 6 and 6 extended upwardly from the clamping portions 5 and 5. The clamping elastic pieces 4 and 4 are bent towards each other in such a manner that the distance between the clamping elastic pieces 4 and 4 are gradually smaller towards the clamping portions 5; i.e., it is smallest at their clamping portions 5 and 5, and the end portions 6 and 6 are inclined outwardly. A pair of side surfaces 3 and 3 of the cylindrical portion 2 which are confronted with each other, have two pairs of locking legs 7 (four locking legs 7) extended from their edges, respectively, in such a manner that they are confronted with each other. The remaining side surfaces 3a and 3a of the cy

REFERENCES:
patent: 3368188 (1968-02-01), Olsson
patent: 3601786 (1971-08-01), Brubaker
patent: 3717841 (1973-02-01), Mancini

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