JPS58123678A - Electric contact pin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical contact pin, and more particularly to the structure of a mounting portion of an electrical contact pin that is mechanically fixed and electrically connected to a through-hole portion of a printed circuit board.

The structure of the mounting part in the conventional electrical contact bottle of this type that contacts the through-hole part of the printed circuit board is a metal plate made of conductive spring material that is cut and bent.
(See FIGS. 1(a) and 2(b)), hollow holes were provided in the mounting portion to make the beam portion flexible (see FIGS. 2(a) and 2(b)). However, in order to promote high-density mounting of electronic components on printed circuit boards, it is necessary to reduce the hole diameter of the through-hole section of the printed circuit board, and accordingly, the mounting section of the electrical contact bottle must be made smaller. became necessary.

However, miniaturizing the mounting part of these pins with conventional structure means that cutting and bending or hollow hole machining becomes difficult.
C, the mechanical strength of the leg weakens, which may cause buckling deformation during driving.

However, the object of the present invention is to make it possible to miniaturize the structure of the mounting part that is mechanically fixed to the through-hole part of the printed circuit board, to make the rigidity slightly smaller, and to make it possible to make the structure of the mounting part which is mechanically fixed to the through-hole part of the printed circuit board by making it possible to reduce the rigidity slightly and to make the structure of the mounting part alternately arranged on at least two opposing sides so as to make it elastic. By providing opposing recesses and arranging them in an accordion shape, it is possible to provide an electrical contact pin that is small, easy to manufacture, and has a stable connection.

The electrical contact pin according to the present invention is provided with alternately opposing recesses on at least two opposing sides of an intermediate mounting portion that fits into a through-hole portion of a printed circuit board, and a diagonal portion of a terminal adjacent to these recesses is provided with a terminal diagonal portion adjacent to the through-hole portion of the printed circuit board. The terminal is characterized in that a chamfered portion that comes into contact with the other terminal is provided on a diagonal portion of the other terminal.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 3(a) is a perspective view showing the first embodiment of the electrical contact pin according to the present invention, FIG. 3(b) is a cross-sectional view of the mounting portion when the connecting pin is inserted into the through hole, and FIG. Figure (C) is a sectional view of the mounting portion before insertion into the through hole.

Referring to FIGS. 3(a) to 3(C), the first
The electrical connection pin according to the embodiment has an intermediate mounting portion 1 for fitting and fixing into a through-hole portion of a printed circuit board, and triangular recesses 2, on two opposing sides of the mounting portion 1, respectively. 3 is provided and 11: is provided. These recesses are alternately arranged facing each other. In order for the terminal corners 45 adjacent to these triangular recesses to sufficiently abut the conductive through-hole portions 8 of the printed circuit board, chamfered portions 6 and 7 are formed at opposite corners of the terminals. This constitutes an accordion-shaped electrical contact pin 9 in which the cross-sectional shape of the rim attachment portion 1 can be elastically deformed.

Before the electrical contact pin 9 configured as described above is inserted into the through-hole portion 8 of the printed circuit board, the dimensions of the mounting portion 1 are equivalent to the inner diameter of the through-hole portion 8, as shown in FIG. 3(C). Although the relationship is large, by inserting it into the through-hole portion 8, the flexibility of the ShearCorp ion shape allows it to be elastically deformed, and the relationship shown in FIG. 3(b) is maintained. 8 can be inserted with a relatively light load without causing damage.

Furthermore, it becomes possible to accommodate slight variations in the inner diameter dimension of the through-hole portion 8. FIG. 4 shows the configuration when the electrical contact pin 9 is inserted into the through hole portion 8 of the printed circuit board 10.

Fig. 5 shows two triangular recesses 2/, each on two opposing sides.
3/ is shown in a sectional view of the electrical contact pin in the second embodiment of the present invention, in which when inserted into the through-hole portion 8, there is a diagonal terminal corner that is not chamfered in the direction of the arrow. Pressure force acts and compresses and deforms. FIGS. 6 and 7 also show the third and fourth electrical contact pins according to the present invention.
The cross-sectional shape of the mounting portion shows an embodiment of the present invention, in which angular recesses 2'' are arranged alternately and oppositely on two opposite sides of the contact pins.

3" and semicircular recesses 2/#, 3/// are provided.

When these are also inserted into the through-hole portion 8, they are elastically deformed under the pressure force in the direction of the arrow and come into mechanical and electrical contact with the through-hole portion 8. Note that it is also possible to provide appropriate recesses on the other two opposing sides of the mounting portion 1 of the electrical contact pin 9 to promote elastic deformation.

The electrical contact pin of the present invention described above may be used alone on a printed circuit board, or may be incorporated as a contact in a multi-pin connector.

As explained above, the present invention employs an accordion structure for the pin mounting portion, thereby increasing flexibility without reducing the effective rigidity as would be the case with cutting or drilling. Since it can be held, the insertion force of the printed circuit board can be reduced. In addition, 5- damage to the through-hole portion of the printed circuit board can be avoided, it can be easily manufactured by crushing with a press, etc., and an electrical contact pin with stable contact can be obtained at low cost.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b), FIGS. 2(a) and 2(b) are configuration diagrams showing examples of conventional electrical contact pins,
3(a) to 3(C) are block diagrams showing a first embodiment of the electrical contact pin according to the present invention, and FIG. 4 shows the electrical contact pin of the first embodiment through a printed circuit board. The figure inserted into the hole part, Fig. 5, Fig. 6, and Fig. 7 are the second figures of the present invention.
．． FIG. 7 is a configuration diagram showing third and fourth embodiments. 1...Mounting part, 2.2', 3.3'...
...triangular recess, 4. Death...Terminal corner, 6,7
... Chamfered part, 8 ... Through hole part, 9 ... Electrical contact pin, 10 ... Printed circuit board, 2', 3".・・・・・・Square recess 2 /
//. 3rd Part 4-Figure

Claims (1)

[Claims] providing alternately opposing recesses on at least two opposing sides of the intermediate mounting portion that fits into the through-hole portion of the printed circuit board;
An electrical contact pin characterized in that a chamfered portion is provided on another terminal diagonal portion so that a terminal diagonal portion adjacent to the recessed portion comes into contact with the through-hole portion.