CA1052882A - Non-rotatable electrical contact pin - Google Patents
Non-rotatable electrical contact pinInfo
- Publication number
- CA1052882A CA1052882A CA228,509A CA228509A CA1052882A CA 1052882 A CA1052882 A CA 1052882A CA 228509 A CA228509 A CA 228509A CA 1052882 A CA1052882 A CA 1052882A
- Authority
- CA
- Canada
- Prior art keywords
- contact pin
- legs
- plane
- longitudinal axis
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/04—Pins or blades for co-operation with sockets
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
- Multi-Conductor Connections (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
ABSTRACT.
An electrical contact pin has a two-legged mounting portion for interference reception in a hole, the legs being shaped to prevent rotation of the contact pin as it is inserted into the hole.
An electrical contact pin has a two-legged mounting portion for interference reception in a hole, the legs being shaped to prevent rotation of the contact pin as it is inserted into the hole.
Description
105~882 This inYention relates to an electrical contact pin, and particularly to an electrical contact pin for mounting in a hole in, for example, a printed circuit board.
More particularly, this invention relates to an electrical contact pin of the type described and claimed in Canadian Patent Application No. 204,267 ~8395).
According to thisinvention there is provided an electrical contact pin comprising first and second terminal portions joined by an intermediate mounting portion comprising two legs which are separated along a plane including the longitudinal axis of the contact pin, the legs extending parallel to the longitudinal axis of the contact pin but being mutually offset and resiliently deformable towards each other in directions parallel to the plane including the longitudinal axis of the contact pin along which the legs are separated, the legs sliding across each other in the plane of separation during such deformation and the end of each leg adjacent the first terminal portion being so shaped that on insertion of the mounting portion into an interference fit hole with the first terminal portion leading, the contact pin has substantially no tendency to rotate about its longitudinal axis.
Embodiments of contact pin according to the invention will now be described by way of example with reference to the drawings, in which:-Figure 1 is a perspective view of a first embodiment with part broken away, Figure 2 is a side elevation of the contact pin of Figure l;
Figure 3 is an end Yiew of the contact pin of
More particularly, this invention relates to an electrical contact pin of the type described and claimed in Canadian Patent Application No. 204,267 ~8395).
According to thisinvention there is provided an electrical contact pin comprising first and second terminal portions joined by an intermediate mounting portion comprising two legs which are separated along a plane including the longitudinal axis of the contact pin, the legs extending parallel to the longitudinal axis of the contact pin but being mutually offset and resiliently deformable towards each other in directions parallel to the plane including the longitudinal axis of the contact pin along which the legs are separated, the legs sliding across each other in the plane of separation during such deformation and the end of each leg adjacent the first terminal portion being so shaped that on insertion of the mounting portion into an interference fit hole with the first terminal portion leading, the contact pin has substantially no tendency to rotate about its longitudinal axis.
Embodiments of contact pin according to the invention will now be described by way of example with reference to the drawings, in which:-Figure 1 is a perspective view of a first embodiment with part broken away, Figure 2 is a side elevation of the contact pin of Figure l;
Figure 3 is an end Yiew of the contact pin of
-2-8525 ', Figure 1; 105~88Z
Figure 4 is a perspective view of a second embodiment with part broken away;
Figure 5 is a side elevation of the contact pin o.
S Figure 4 prior to insertion into a hole;
Figure 6 is an end view on Figure 5;
~ igure 7 is a side elevation of the contact pin of Figure 4 after insertion into a hole; and Figure 8 is an end view on Figure 7. '.
The electrical contact pin 1 shown in Figures 1 to
Figure 4 is a perspective view of a second embodiment with part broken away;
Figure 5 is a side elevation of the contact pin o.
S Figure 4 prior to insertion into a hole;
Figure 6 is an end view on Figure 5;
~ igure 7 is a side elevation of the contact pin of Figure 4 after insertion into a hole; and Figure 8 is an end view on Figure 7. '.
The electrical contact pin 1 shown in Figures 1 to
3 comprises a first terminal portion 2 formed as a substantially rectangular cross-section post, a second terminal portion 3 formed as a substantially rectangular cross-section post, and an intermediate mounting portion
4 comprising two legs 5 and 6 which are separated along a plane 7 including the longitudinal axis of the contact pin 1. The legs 5 and 6 extend parallel to the longitudinal axis of the contact pin 1 but are mutually offset and disposed on opposite sides of the plane 7. The legs 5 and 6 have smoothly rounded longitudinal outer edses 8 and 9.
The second terminal portion 3 is formed with a pair of bosses 10 which provide a pair of shoulders 11 which face the mounting portion 4 and extend transversely of the longitudinal axis of the contact pin 1. The shoulders 11 serve to seat the contact pin 1 on the surface of, for example, a printed circuit board (not shown) in known manner.
As shown in Figure 3, the legs 5 and 6 initially define a lateral dimenslon which is greater than the d1amster of a hole, represented by a circle 12, ln, for lOS'~882 example, a printed circuit board, in which hole 12 the contact pin 1 is to be mounted. Thus, as the ~ounting portion 4 of the contact pin 1 is urged into the hole 12 the ]egs 5 and 6 are urged inwardly towards each other and slide across each other at the plane 7 until they are received in ~he hole 12, where they remain resiliently biased against the wall of the hole 12 to secure the contact pin 1 in the hole 12 prior to any subsequent soldering operation. The rounding of the edges 8 and 9 of the legs
The second terminal portion 3 is formed with a pair of bosses 10 which provide a pair of shoulders 11 which face the mounting portion 4 and extend transversely of the longitudinal axis of the contact pin 1. The shoulders 11 serve to seat the contact pin 1 on the surface of, for example, a printed circuit board (not shown) in known manner.
As shown in Figure 3, the legs 5 and 6 initially define a lateral dimenslon which is greater than the d1amster of a hole, represented by a circle 12, ln, for lOS'~882 example, a printed circuit board, in which hole 12 the contact pin 1 is to be mounted. Thus, as the ~ounting portion 4 of the contact pin 1 is urged into the hole 12 the ]egs 5 and 6 are urged inwardly towards each other and slide across each other at the plane 7 until they are received in ~he hole 12, where they remain resiliently biased against the wall of the hole 12 to secure the contact pin 1 in the hole 12 prior to any subsequent soldering operation. The rounding of the edges 8 and 9 of the legs
5 and 6 ensures that these edges do not unduly damage the wall of the hole 12, which may be metal plated, and also provides a relatively large surface area on the legs 5 and
6 for contact with the wall of the hole 12 to provide good electrical and mechanical connection.
Such a contact pin is substantially as described in the prior specification mentioned above, and is normally acceptable for use in most circumstances except where there must be substantially no rotation of the contact pin about its longitudinal axis when the mounting pin is urged into a hole, as the hole 12, as described.
In order that the contact pin should have substantially no tendency to so rotate, in the embodiment shown in Figures 1 to 3 the end of each leg 5 or 6 adjacent the first terminal portion 2 terminates in a point 13 lying in the plane 7 and on a surface 14 of the first terminal portion 2.
The angle between the plane 7 and the opposite surface 15 of each of the legs 5 and 6 at the point 13 is, as indicated, approximately 15 at the outer surface 16 of the legs 5 or 6, and approximately 23 at the surface 14 of the first terminal portion 2.
1C~5'~38Z
It has been found that with such a construction of contact pin the forces acting to urge the legs 5 and 6 towards each other as the mounting portion ~ is urged into a hole, as the hole 12, with the first terminal portion leading, act in substantially directly opposed manner, and thus there is substantially no tendency for the contact pin 1 to rotate about its longitudinal axis.
Referring now to Figures 4 to 8, the contact pin 17 here shown comprises a first terminal portion 18 formed as a circular cross-section post, a second terminal portion 19 formed as a circular cross-section post, and an intermediate mounting portion 20 comprising two legs 21 and 22 which are separated along a plane 23 including the longitudinal axis of the contact pin 17. The legs 21 and 22 extend parallel to the longitudinal axis of the contact pin 17, but are mutually offset and disposed on opposite sides of the plane 23. The second terminal portion 19 is formed with a pair of bosses 24 which provide a pair of shoulders 25 which face the mounting portion 20 and extend transversely of the longitudinal axis of the contact pin 17. The shoulders 25 serve to seat the contact pin 17 on the surface of, for example, a printed circuit board (not sho~m) in known manner.
As shown in Figures 5 and 6, the legs 21 and 22 initially define a lateral dimension which is greater than the diameter of a hole, represented by a circle 26 in Figures 6 and 8, in, for example, a printed circuit board, in which hole 26 the contact pin 17 is to be mounted. Thus, as the mounting portion 20 is urged into the hole 26, the legs 21 and 22 are urged inwardly towards each other and lOS'~88Z
slide across each other at the plane 23 until they are received in the hole 26 as shown in Figure 8, where they remain resiliently biased against the wall of the hole 26 to secure the contact pin 17 in the hole 26 prior to any subsequent soldering operation. The rounded surfaces of the legs 21 and 22 ensure that the legs 21 and 22 do not unduly damage the wall of the hole 26, which may be metal plated, and also provide a relatively large surface area on the legs 21 and 22 for contact with the wall of the hole 26 to provide good electrical and mechanical connection.
As Lndicated by the arrows in Figures 6 and 8, the forces acting to urge the legs 21 and 22 towards each other as the mounting portion 20 is urged into a hole, as the hole 26, with the first terminal portion i8 leading, act in substantially directly opposed manner and in the plane 23, and thus there is substantially no tendency for the contact pin 17 to rotate about its longitudinal axis.
Although in the embodiment of Figures 4 to 8 the contact is formed from circular cross-section stock, the contact pin can otherwise be formed from stock having an oval or an elliptical cross-section, the major and minor axes of the contact pin cross-section being slightly rotated with respect to the plane of separation of the legs of the mounting portion of the contact pin so that diagonally opposite quadrants of the mounting portion are of different shape. Preferably the plane of separation between the legs of the mounting portion is at a small angle to the plane including the minor axes of the contact pin cross-section.
When such a contact pin is inserted into a hole as - G - --` 105'~88Z
described above for the contact pin of Figures 4 to 8, only two sMall surface area portions of the quadrants of the legs displaced furthest from the centre of the contact pin, adjacent the plane of separation between the legs, will contact the wall of the hole, and thus the forces acting to urge the legs of the mounting portion towards each other are substantially directly opposed and act in the plane of separation of the legs. Thus, there is substantially no tendency for the contact pin to rotate as it is urged into a hole as described.
Such a contact pin is substantially as described in the prior specification mentioned above, and is normally acceptable for use in most circumstances except where there must be substantially no rotation of the contact pin about its longitudinal axis when the mounting pin is urged into a hole, as the hole 12, as described.
In order that the contact pin should have substantially no tendency to so rotate, in the embodiment shown in Figures 1 to 3 the end of each leg 5 or 6 adjacent the first terminal portion 2 terminates in a point 13 lying in the plane 7 and on a surface 14 of the first terminal portion 2.
The angle between the plane 7 and the opposite surface 15 of each of the legs 5 and 6 at the point 13 is, as indicated, approximately 15 at the outer surface 16 of the legs 5 or 6, and approximately 23 at the surface 14 of the first terminal portion 2.
1C~5'~38Z
It has been found that with such a construction of contact pin the forces acting to urge the legs 5 and 6 towards each other as the mounting portion ~ is urged into a hole, as the hole 12, with the first terminal portion leading, act in substantially directly opposed manner, and thus there is substantially no tendency for the contact pin 1 to rotate about its longitudinal axis.
Referring now to Figures 4 to 8, the contact pin 17 here shown comprises a first terminal portion 18 formed as a circular cross-section post, a second terminal portion 19 formed as a circular cross-section post, and an intermediate mounting portion 20 comprising two legs 21 and 22 which are separated along a plane 23 including the longitudinal axis of the contact pin 17. The legs 21 and 22 extend parallel to the longitudinal axis of the contact pin 17, but are mutually offset and disposed on opposite sides of the plane 23. The second terminal portion 19 is formed with a pair of bosses 24 which provide a pair of shoulders 25 which face the mounting portion 20 and extend transversely of the longitudinal axis of the contact pin 17. The shoulders 25 serve to seat the contact pin 17 on the surface of, for example, a printed circuit board (not sho~m) in known manner.
As shown in Figures 5 and 6, the legs 21 and 22 initially define a lateral dimension which is greater than the diameter of a hole, represented by a circle 26 in Figures 6 and 8, in, for example, a printed circuit board, in which hole 26 the contact pin 17 is to be mounted. Thus, as the mounting portion 20 is urged into the hole 26, the legs 21 and 22 are urged inwardly towards each other and lOS'~88Z
slide across each other at the plane 23 until they are received in the hole 26 as shown in Figure 8, where they remain resiliently biased against the wall of the hole 26 to secure the contact pin 17 in the hole 26 prior to any subsequent soldering operation. The rounded surfaces of the legs 21 and 22 ensure that the legs 21 and 22 do not unduly damage the wall of the hole 26, which may be metal plated, and also provide a relatively large surface area on the legs 21 and 22 for contact with the wall of the hole 26 to provide good electrical and mechanical connection.
As Lndicated by the arrows in Figures 6 and 8, the forces acting to urge the legs 21 and 22 towards each other as the mounting portion 20 is urged into a hole, as the hole 26, with the first terminal portion i8 leading, act in substantially directly opposed manner and in the plane 23, and thus there is substantially no tendency for the contact pin 17 to rotate about its longitudinal axis.
Although in the embodiment of Figures 4 to 8 the contact is formed from circular cross-section stock, the contact pin can otherwise be formed from stock having an oval or an elliptical cross-section, the major and minor axes of the contact pin cross-section being slightly rotated with respect to the plane of separation of the legs of the mounting portion of the contact pin so that diagonally opposite quadrants of the mounting portion are of different shape. Preferably the plane of separation between the legs of the mounting portion is at a small angle to the plane including the minor axes of the contact pin cross-section.
When such a contact pin is inserted into a hole as - G - --` 105'~88Z
described above for the contact pin of Figures 4 to 8, only two sMall surface area portions of the quadrants of the legs displaced furthest from the centre of the contact pin, adjacent the plane of separation between the legs, will contact the wall of the hole, and thus the forces acting to urge the legs of the mounting portion towards each other are substantially directly opposed and act in the plane of separation of the legs. Thus, there is substantially no tendency for the contact pin to rotate as it is urged into a hole as described.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An electrical contact pin comprising first and second terminal portions joined by an intermediate mounting portion comprising two legs which are separated along a plane including the longitudinal axis of the contact pin, the legs extending parallel to the longitudinal axis of the contact pin but being mutually offset and resiliently deformable towards each other in directions parallel to the plane including the longitudinal axis of the contact pin along which the legs are separated, the legs sliding across each other in the plane of separation during such deformation, and the end of each leg adjacent the first terminal portion being so shaped that on insertion of the mounting portion into an interference fit hole with the first terminal portion leading, the contact pin has substantially no tendency to rotate about its longitudinal axis.
2. A contact pin as claimed in Claim 1, in which the first and second terminal portions are of similar circular cross-section, and the legs are each of semi-circular cross-section.
3. A contact pin as claimed in Claim 1, in which the first and second terminal portions are substantially rectangular in cross-section and in which the end of each leg adjacent the first terminal portion terminates in a point lying in the plane including the longitudinal axis of the contact pin along which the legs are separated and on a surface of the first terminal portion.
4. A contact pin as claimed in Claim 3, in which the angle between the plane of separation of the legs and the opposite surface of each leg at the end of each leg adjacent the first terminal portion is in each case approximately 15° at the outer surface of the leg and approximately 23° at the surface of the first terminal portion.
5. A contact pin as claimed in Claim 1 formed from stock having an oval or elliptical cross-section, the major and minor axes of the contact pin cross-section being slightly rotated with respect to the plane of separations of the legs so that diagonally opposite quadrants of the mounting portion are of different shape.
6. A contact pin as claimed in Claim 5, in which the plane of separation between the legs of the mounting portion is at a small angle to the plane including the minor axes of the contact pin cross-section.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US48157774A | 1974-06-21 | 1974-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1052882A true CA1052882A (en) | 1979-04-17 |
Family
ID=23912512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA228,509A Expired CA1052882A (en) | 1974-06-21 | 1975-06-04 | Non-rotatable electrical contact pin |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5951715B2 (en) |
| BR (1) | BR7503905A (en) |
| CA (1) | CA1052882A (en) |
| DE (1) | DE2525640C2 (en) |
| ES (1) | ES438726A2 (en) |
| FR (1) | FR2275902A2 (en) |
| GB (1) | GB1505895A (en) |
| IT (1) | IT1046588B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5776895A (en) * | 1980-10-30 | 1982-05-14 | Kel Kk | Circuit board pin |
| JPS6016073B2 (en) * | 1981-05-30 | 1985-04-23 | ケル株式会社 | connector |
| DE3221844A1 (en) * | 1982-01-19 | 1984-12-06 | Allied Corp., Morris Township, N.J. | PRESS CONTACT |
| US4475780A (en) * | 1982-04-16 | 1984-10-09 | Buckbee-Mears Company | Compliant electrical connector |
| AU565072B2 (en) * | 1982-05-24 | 1987-09-03 | Amp Incorporated | Contact element |
| JPS593477U (en) * | 1982-06-29 | 1984-01-10 | 富士通株式会社 | terminal structure |
| DE3572894D1 (en) * | 1984-12-04 | 1989-10-12 | Amp Inc | Method of making an electrical terminal having a compliant retention section |
| DE3909310A1 (en) * | 1989-03-21 | 1990-09-27 | Unimet Gmbh | Contact pin |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1615681A1 (en) * | 1967-01-27 | 1970-06-18 | Amp Inc | Electrical connector pin and method for its manufacture |
-
1975
- 1975-05-30 IT IT23945/75A patent/IT1046588B/en active
- 1975-06-04 CA CA228,509A patent/CA1052882A/en not_active Expired
- 1975-06-09 DE DE2525640A patent/DE2525640C2/en not_active Expired
- 1975-06-11 GB GB24946/75A patent/GB1505895A/en not_active Expired
- 1975-06-18 JP JP50073249A patent/JPS5951715B2/en not_active Expired
- 1975-06-20 BR BR5016/75D patent/BR7503905A/en unknown
- 1975-06-20 FR FR7519422A patent/FR2275902A2/en active Granted
- 1975-06-20 ES ES438726A patent/ES438726A2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1505895A (en) | 1978-03-30 |
| IT1046588B (en) | 1980-07-31 |
| FR2275902A2 (en) | 1976-01-16 |
| DE2525640A1 (en) | 1976-01-08 |
| ES438726A2 (en) | 1977-03-16 |
| FR2275902B2 (en) | 1981-09-25 |
| BR7503905A (en) | 1976-07-06 |
| DE2525640C2 (en) | 1983-12-22 |
| JPS5113986A (en) | 1976-02-03 |
| JPS5951715B2 (en) | 1984-12-15 |
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