JPS5951715B2 - electrical contact pins - Google Patents

Abstract

1505895 Two-part couplings; contact pins AMP Inc 11 June 1975 [21 June 1974] 24946/75 Addition to 1470007 Heading H2E A contact pin is similar to that of Specification 1,470,007, but has the offset legs 5, 6 each terminating in a point 13 on a respective side 14 of terminal 2 to inhibit any tendancy of the pin to rotate as it is inserted into a hole in a printed circuit board. In another embodiment rotation is inhibited by the use of semi-circular (Figs. 4-8, not shown), cross-section legs.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to electrical contact pins, and more particularly to electrical contact pins for mounting in holes in printed circuit boards and the like.

Furthermore, the present invention is disclosed in Japanese Patent No. 1216717 (Japanese Patent Publication No. 5814
No. 1633) This invention relates to an improvement of the electrical contact pin of the form shown in the specification, and relates to an electrical contact pin that is prevented from rotating when inserted into a hole. According to one characteristic of the invention, the invention comprises a first terminal part and a second terminal part connected to each other by an intermediate mounting part, said intermediate mounting part extending along a plane containing the longitudinal axis of the electrical contact pin. comprising two legs separated from each other by the electrical contact pin, said legs extending parallel to the longitudinal axis of said electrical contact pin but offset from each other and elastically disposed toward each other along said plane. An electrical contact pin capable of being deformed into an electrical contact pin, characterized in that the end of each leg proximate to the first terminal portion terminates in a point in one plane of the plane and the first terminal portion. Electrical contact pins are provided.

According to another feature of the invention, the invention further comprises a first terminal part and a second terminal part connected to each other by an intermediate mounting part, said intermediate mounting part including a longitudinal axis of said electrical contact pin. comprising two legs separated from each other along a plane;
In an electrical contact pin, the legs extend parallel to the longitudinal axis of the electrical contact pin but are offset from each other and are elastically deformable towards each other along the plane, the first terminal portion and the second terminal portion also has a circular cross section, and each of the legs has a semicircular cross section, such that the forces acting on the legs when inserting the electrical contact pin into the opening are in substantially opposite directions. It has An electrical contact pin is provided.

Two characteristics of the electrical contact pin of the invention will be explained below for respective embodiments with reference to the accompanying drawings. The electrical contact pin 1 shown in FIGS. 1 to 3 has a first terminal part 2 formed as a post of substantially rectangular cross-section and a second terminal part 2 likewise formed as a post of substantially rectangular cross-section. part 3 and an intermediate attachment part 4.

The intermediate mounting part 4 contains two legs 5, 6 which are spaced apart from each other along a plane 7 containing the longitudinal axis of the contact pin 1. The legs 5, 6 extend parallel to the longitudinal axis of the contact pin 1, but are mutually offset and on either side of the plane 7.
The legs 5, 6 are inclined at an angle of less than 30° about the axis of the plane 7 from the bifurcation point of both legs, and reach the peripheral edge of the legs.
The legs 5, 6 have smoothly curved longitudinal outer edges 8, 9. The second terminal part 3 has l pairs of bosses 10 with scraps 11 facing the mounting part 4. The waste portion 11 extends transversely with respect to the longitudinal axis of the contact pin 1 . The waste portion 11 is removed by a known method, for example. This serves to seat the contact pins 1 on the surface of a lint circuit board (not shown). As shown in Figure 3,
The legs 5, 6 initially have a lateral dimension that is larger than the diameter of the opening 12, for example in a printed circuit board, in which the contact pin 1 is mounted.

Therefore, when the mounting part 4 of the contact pin 1 is pushed into the hole 12, the legs 5, 6 are pressed inwardly towards each other and slid along the plane 7 to be received in the hole 12. After the contact pin 1 is inserted into the hole 12, both legs 5 and 6 are soldered.
It remains resiliently engaged with the wall of the hole 12 to secure it therein. Since the outer edges 8, 9 of the legs 5, 6 are curved, they do not unduly damage the walls of the holes 12, which may be metal plated. At the same time, a relatively large surface area is provided on the legs 5, 6 by the outer edges 8, 9 which can come into contact with the wall of the hole 12, so that a good electrical and mechanical connection is obtained. Such a contact pin is disclosed in the above-mentioned patent No. 12167.
17 (Japanese Patent Publication No. 58-41633), but the contact pin is substantially rotated about its longitudinal axis when the contact pin is pushed into the aforementioned hole 12, for example. Suitable for use in such a way that it is not possible to do so.

In order to prevent the contact pin from being able to rotate about its longitudinal axis, in the embodiment shown in FIGS. are legs 5 and 6
are separated from each other and reach a pointed end 13 lying on a plane 7 containing the longitudinal axis of the contact pin 1 and on the surface 14 of the first terminal part 2 . The angle between the opposing surface 15 of each leg 5, 6 and the plane 7 at the tip 13 is as shown in FIG.
or approximately 15° at the outer surface 16 of the leg 6 and approximately 23° at the surface 14 of the first terminal portion 2.

According to the contact pin having such a structure, when the mounting portion 4 is pushed into the hole 12 with the first terminal portion 2 in advance, the inclined leg surface forming the tip portion 13 first engages with the hole 12. , the sharp side edges of this inclined leg surface are inserted into the hole 12 in strong abutment against the wall of the hole 12 so as to prevent axial rotation of the contact pin, and act to bring the legs 5 and 6 closer to each other. Since the forces act in substantially opposite directions, the contact pin 1 does not substantially tend to rotate about its longitudinal axis.

In the process of inserting the contact pin, the surface 1 of both legs 5 and 6
By the time the part containing 5 completely passes through the hole 12 while preventing the axial rotation of the contact pin as described above, the legs 5 and 6 have come close enough to each other, and in further insertion, both legs 5
, 6 strongly abut against the wall of the hole 12, so that no rotation of the contact pin occurs. Referring now to FIGS. 4 to 8, the contact pin 17 shown in the figure has a first terminal portion 18 formed as a post having a circular cross section, and a second terminal portion 18 similarly formed as a post having a circular cross section. section 19 and an intermediate attachment section 20.

The intermediate mounting portion 20 is located in a plane 2 containing the longitudinal axis of the contact pin 17.
two legs 2 having a semicircular cross section separated from each other along 3;
Contains 1,22. The legs 21, 22 extend parallel to the longitudinal axis of the contact pin 17, but are offset from each other on either side of the plane 23. The second terminal part 19 has a pair of bosses 24 provided with scraps 25 which extend transversely with respect to the longitudinal axis of the contact pin 17 facing the intermediate mounting part 20 . The scrap portion 25 serves in a known manner to seat the contact pin 17 on the surface of, for example, a printed circuit board (not shown). As shown in FIGS. 5 and 6, the legs 2], 2
The lateral dimension of 2 is larger than the diameter of the hole 26 shown in FIGS. 6 and 8, such as a hole in a printed circuit board, in which the contact pin 17 is mounted. Therefore, the mounting portion 20 is connected to the hole 26.
When pushed inward, the legs 21, 22 are forced inwardly toward each other and slide relative to each other across plane 23 until they are received within hole 26, as shown in FIG. At this point, the leg 21
, 22 continue to be resiliently biased against the wall of the hole 26 before the soldering operation is carried out, so that the contact pin 17 remains in the hole 26.
fixed inside. The curved surfaces of the legs 21 and 22 prevent the legs 21 and 22 from unduly damaging the wall of the hole 26, which may be plated with metal, and also prevent the legs 21 and 22 from coming into contact with the wall of the hole 26. By providing a relatively large contact area on 22, good electrical and mechanical contact is obtained. For example, the first terminal portion 18 is placed in front of the mounting portion 20 with instruction number 2.
6, the forces acting to bring the legs 21, 22 closer to each other, as indicated by the arrows in FIGS. 6 and 8, are in substantially opposite directions in the plane 23. , so that the contact pin 17 does not substantially try to rotate about its longitudinal axis.

In the embodiment shown in FIGS. 4 to 8, the contact pin is formed from a material with a cross-section, but it can also be formed from a material with an oval or oval cross-section, in which case the contact pin has a cross-section of By slightly rotating the major and minor axes of the contact pin with respect to the plane separating the legs of the attachment portion from each other, diagonally opposite quadrants of the attachment portion may assume different configurations.

Preferably, the plane separating the legs of the attachment part is slightly inclined with respect to the plane containing the short axis of the cross section of the contact pin. When such a contact pin is inserted into the hole described with respect to the contact pin of FIGS. 4 to 8, only the two narrow areas of the quadrants of the legs that are moved furthest from the center of the contact pin are Since the legs contact the wall of the hole adjacent to the plane separating the legs from each other, the forces acting to bring the legs of the mounting part closer to each other are directed in substantially opposite directions and the plane separating the legs from each other act within.

Therefore, when the contact pin is pushed into the above-mentioned hole, the contact pin does not substantially rotate.Additional relationship The present invention is within the scope of the claims of original patent No. 1216717 (Japanese Patent Publication No. 58-41633). Inventions described in the column
That is, it has an elongate mounting portion adapted to be received in an opening in a base body and secured to the base body, the mounting portion having a longitudinal extension so as to provide a pair of legs joined at opposite ends. sheared along a plane, said legs being offset apart from each other in a direction parallel to the sheared plane so that they are aligned with each other on either side of a plane perpendicular to said shear plane and containing the longitudinal axis of said attachment part. In an electrical contact pin having a portion offset parallel to An invention in which the main part of the invention is "electrical contact pins, characterized in that they are elastically deformed towards each other so as to slide over the entire length of the legs", In addition to achieving the same purpose as the invention,
Since the contact pin has an improved structure so that it does not rotate when inserted into the hole, it falls under the invention that satisfies the requirements of Article 31, Item 1 of the Patent Law.

[Brief explanation of the drawing]

1 is a partially cutaway perspective view of an embodiment of the electrical contact pin of the first invention, FIG. 2 is a side elevational view of the electrical contact pin shown in FIG. 1, and FIG. 3 is an electrical contact pin shown in FIG. 1. end view of contact pin,
FIG. 4 is a partially cutaway perspective view of an embodiment of the electrical contact pin of the second invention, and FIG. 5 shows the electrical contact pin shown in FIG. 4 in a state before it is inserted into the hole. FIG. 6 is a perspective view of the pin, FIG. 6 is a cross-sectional view of the leg of the pin before the electrical contact pin is inserted into the hole, and FIG. 7 is a perspective view of the electrical contact pin shown in FIG. FIG. 8 is a perspective view of the pin shown after it has been inserted into the hole, and FIG. 8 is a cross-sectional view of the leg of the electrical contact pin after it has been inserted into the hole. 1, 17... Electric contact pin, 2, 18...
...First terminal part, 3, 19... Second terminal part, 7, 23... Surface, 4, 20... Intermediate mounting part, 12, 26... ...hole, 5, 21...
... Leg part, 13... Point part, 6, 22...
···leg.

Claims (1)

Claims: 1. A first terminal portion and a second terminal portion that are connected to each other by an intermediate attachment portion, the intermediate attachment portion being connected to each other along a plane containing the longitudinal axis of the electrical contact pin. two separate legs extending parallel to the longitudinal axis of the electrical contact pin but offset from each other and elastically deforming towards each other along the plane; In a possible electrical contact pin, the end of each of the legs 5, 6 proximate to the first terminal part 2 has a point 13 in the plane 7 and in one face 14 of the first terminal part 2. Electrical contact pins characterized by finishing. 2 comprising a first terminal and a second terminal portion connected to each other by an intermediate mounting portion, said intermediate mounting portions being separated from each other along a plane containing the longitudinal axis of the electrical contact pin;
an electrical contact comprising legs extending parallel to the longitudinal axis of the electrical contact pin but offset from each other and elastically deformable toward each other along the plane; In the pin, the first terminal portion 18 and the second terminal portion 19 have the same circular cross section, and each of the legs 21, 22 has a semicircular cross section, so that the electrical contact pin is inserted into the opening. An electrical contact pin characterized in that the forces acting on both legs 21 and 22 have substantially opposite directions.