WO1998057396A1 - Kontaktstift - Google Patents
Kontaktstift Download PDFInfo
- Publication number
- WO1998057396A1 WO1998057396A1 PCT/DE1998/001439 DE9801439W WO9857396A1 WO 1998057396 A1 WO1998057396 A1 WO 1998057396A1 DE 9801439 W DE9801439 W DE 9801439W WO 9857396 A1 WO9857396 A1 WO 9857396A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- section
- contact
- press
- contact pin
- sections
- Prior art date
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
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/50—Fixed connections
- H01R12/51—Fixed connections for rigid printed circuits or like structures
- H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
- H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
- H01R12/585—Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board
Definitions
- the invention relates to a contact pin for solder-free fastening in metallized perforations of electrical printed circuit boards with an at least partially elastically deformable press-in section which has contact clips which each have a web section, the web sections being oriented towards one another.
- Such a contact pin is known from DE 38 04 041 AI.
- the known contact pin comprises a shaft section and an at least partially elastically deformable press-in section, the press-in section having contact brackets between which an elastically deformable connecting web which is interrupted in sections to increase the elasticity extends.
- Web sections formed in the interrupted section of the connecting web are oriented towards one another and extend between the contact brackets which run in a V-shape in the press-in section in order to facilitate the insertion of the press-in section into the perforation. Pressing in the continuous section of the connecting web following the web sections, however, leads to a sudden reduction in the elastic deformability of the press-in section and thus to an undesirable sudden increase in the contact pressure.
- the contact pin has a concave lengthways and Circumferentially rounded contact bracket, which are spaced apart by a needle-like elongated hole. Due to the concave and rounded design of the contact bracket, high holding forces can be generated in the perforations of printed circuit boards, while at the same time avoiding damage to the metal coating of the perforations. Due to the concave design of the contact bracket, however, there are different contact pressures in the longitudinal direction, which can be undesirable in particular in the case of multilayer printed circuit boards.
- the elastic deformability of the press-in section is an important property in the case of solderless insertion. If the elastic deformability is too low, hole tolerances resulting from the production of printed circuit boards can no longer be compensated for. There is also the risk of damaging the metal coating of the perforation when cracks are inserted or even tearing when inserting the contact pin, so that a possibly necessary exchange of the contact pin or a repair are made more difficult. In addition, metal chips can be formed by the insertion, which can produce undesired electrical connections at other locations on the printed circuit board.
- the invention has for its object to provide a contact pin of the type mentioned, which can be inserted into a perforation with defined press-in forces, so that damage to a hole coating, which adversely affects the electrical properties, is avoided, and its press-in section at the same time for formation gas-tight connections generated sufficiently high holding forces.
- the object is achieved with a contact pin of the type mentioned at the outset in that the web sections are designed as tapered wedge sections which are aligned with one another with their tapered end regions such that the wedge sections slide past one another at least in sections when the press-in section is inserted.
- An expedient development of the contact pin consists in providing, on the wedge sections, convex sliding sides on which the wedge sections slide past one another.
- the transversely offset wedge sections abut against one another section by section with the edges of their end regions in such a way that there is a linear contact with one another.
- the wedge sections abut each other before insertion such that there is a flat contact on their sliding surfaces.
- the wedge sections of a further embodiment can be designed asymmetrically and have non-contact sides facing away from one another, which differ from the slip-on sides and have differently inclined, mutually angled sections.
- the contact clips have insertion shoulders for sliding into the associated perforation, into the area of which the wedge sections of the contact clips extend.
- the wedge sections preferably extend over a substantial part of the press-in section.
- the contact clips can run parallel, concave or reduce the cross-section of the contact pin towards one another.
- the contact clips have rounded contours to protect the hole coating.
- the contact pin also comprises a shaft in addition to the press-in section. section which adjoins one end of the press-in section, and an insertion section which extends from the end of the press-in section opposite the shaft section.
- the shaft section and the insertion section have a smaller transverse diameter with respect to the press-in section, so that the press-in section extends beyond the shaft section and the insertion section.
- stop shoulders are provided on the contact pin, at least in sections at right angles to the longitudinal direction, for supporting a press-in auxiliary device.
- the stop shoulders are formed on the end of the press-in section adjoining a shaft section in a section of shaft transition shoulders.
- FIG. 1 is a side view of an embodiment of a contact pin according to the invention
- Fig. 2 shows a cross section of the contact pin of FIG. 1 in the central region of a press-in section before insertion into a hole in a circuit board and 3 shows the cross section of the contact pin according to FIG. 2 in the central region of the press-in section after insertion into a perforation.
- the contact pin 1 shown by way of example in FIG. 1 comprises a shaft section 2, an insertion section 3 adjoining the shaft section 2 and an insertion section 4 which is arranged on the end of the pressing section 3 opposite the shaft section 2.
- the shaft section 2 is tapered like a truncated wedge at its free end and, depending on the application of the contact pin 1, can be pressed into a plastic body or overmolded with plastic over a certain length. In such an area of the plastic section 2 surrounded by plastic, an inflexible embossing can be applied to increase the holding force.
- This can be designed such that, for example in the case of a 2, 4-wing embossing, a 2, 4 harpoon embossing or the like, it leads to a section-wise increase in the circumference of the shaft section 2, or, for example in the case of a notch, a section-wise reduction of the circumference of the shaft section 2.
- the insertion section 4 has centering shoulders 5 that are arranged to center the contact pin 1 with respect to a printed circuit board perforation, not shown.
- the centering shoulders 5 pass into an intermediate section 6 adjoining the press-in section 3, the diameter of which essentially corresponds to that of the Shaft section 2 corresponds.
- the shaft section 2 and the insertion section 4 have a rectangular cross section in the illustrated embodiment. However, the cross-section could also be designed differently, for example cylindrical.
- the press-in section 3 has a first contact clip 7 and a second contact clip 8, the contact clips 7, 8 projecting beyond the contour of both the shaft section 2 and the insertion section 4, so that at the end of the press-in section adjoining the shaft section 2 tes 3 shaft transition shoulders 9 and insertion shoulders 10 are formed on the end adjoining the insertion section 4.
- a central region 11 of the press-in section 3 extends between the shaft transition shoulders 9 and the insertion shoulders 10.
- the contact brackets 7, 8 have wedge sections 12, 13 which are aligned with one another and extend over the entire central region 11 into the region of the introduction school - extend into 10.
- the shaft transition shoulders 9 run at least in sections at right angles to the shaft section 2 to support a press-in auxiliary device, so that acting press-in forces are absorbed.
- a shaft transition surface 14 extends from the wedge sections 12, 13 in the direction of the shaft section 2.
- a first centering transition surface 15 extends in the direction of the centering shoulders 5 and one on it subsequent second centering transition surface 16.
- the wedge sections 12, 13 furthermore each have mutually facing, concave sliding sides 19, 20 and non-contact sides 21, 22 facing away from one another.
- the non-contact sides 21, 22 each comprise an inner, relatively flat rising flat section 23 and a more inclined steep section 24 in the outer region.
- outer bracket surfaces 25, 26 are formed which are circumferentially rounded to avoid chip formation during the insertion of the press-in section 3 and merge into the wedge sections 12, 13 with respective bracket edge curves 27, 28.
- 3 shows a cross section of the contact pin 1 according to FIG. 1 and FIG. 2 after insertion into a printed circuit board perforation 30 lined with a hole coating 29 of a printed circuit board 31.
- the wedge sections 12, 13 were joined to one another by insertion along their sliding sides 19, 20 sliding past each other so that there is a flat contact between the sliding sides 19, 20.
- the contact pin 1 is first brought up to the printed circuit board perforation 30 and centered with respect to the latter by the centering shoulder 5 of the insertion section 4.
- the contact pin 1 can now be inserted into the printed circuit board perforation 30 without generating an inward perforation pressure until the circumference of the insertion shoulders 10 corresponds to the diameter of the printed circuit board perforation 30.
- Due to the V-shaped configuration of the insertion shoulders 10, the circumference of the contact brackets 7, 8 increases in the direction of the central region 11.
- the embrasure forces furthermore cause the contact clips 7, 8 to move towards one another and the wedge sections 12, 13 to be displaced relative to one another in such a way that they slide past one another on their sliding sides 19, 20, a flat contact being formed.
- the concave rise of the sliding sides 19, 20 has the effect that the surface frictional forces of this flat contact increase when the contact clips 7, 8 are moved further towards one another. Since the surface frictional forces are opposite to the direction of movement of the wedge sections 12, 13, they accordingly reduce the elastic deformability of the press-in section 3, so that the contact pressure of the contact clips 1, 8 increases as a function of the circumference of the contact clips 7, 8.
- the change in the elastic deformability of the press-in section 3 and thus both the holding force of the contact pin 1 in the printed circuit board perforation 30 and the press-in and push-out forces required for insertion or replacement are determined in the contact pin 1 according to the invention by the slope of the sliding-on sides 19, 20.
- the holding force and the pressing-in or pressing-out force can be changed in a simple manner and, for example, be adapted to different boundary conditions such as changed basic material properties.
- the slope of the slide-on sides 19, 20 towards the shaft section 2 can increase, for example, if greater holding forces should be required for use in this area.
- the slope of the sliding-on sides 19, 20 in the middle of the press-in section 3 is less than at the edge regions of the wedge sections 12, 13, so that a graph occurring when the contact brackets 7, 8 are curved serves the contact pressure in the printed circuit board perforation 30 is compensated.
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
- Multi-Conductor Connections (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Lead Frames For Integrated Circuits (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT98934800T ATE213363T1 (de) | 1997-06-12 | 1998-05-22 | Kontaktstift |
DE59803073T DE59803073D1 (de) | 1997-06-12 | 1998-05-22 | Kontaktstift |
EP98934800A EP0988667B1 (de) | 1997-06-12 | 1998-05-22 | Kontaktstift |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19724703A DE19724703C1 (de) | 1997-06-12 | 1997-06-12 | Kontaktstift |
DE19724703.2 | 1997-06-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998057396A1 true WO1998057396A1 (de) | 1998-12-17 |
Family
ID=7832188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/001439 WO1998057396A1 (de) | 1997-06-12 | 1998-05-22 | Kontaktstift |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0988667B1 (de) |
AT (1) | ATE213363T1 (de) |
DE (2) | DE19724703C1 (de) |
WO (1) | WO1998057396A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4452986B2 (ja) * | 2003-10-27 | 2010-04-21 | 住友電装株式会社 | 測定装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3783433A (en) * | 1971-01-18 | 1974-01-01 | Litton Systems Inc | Solderless electrical connection system |
US4606589A (en) * | 1984-01-12 | 1986-08-19 | H & V Services | Compliant pin |
EP0279061A1 (de) * | 1987-02-20 | 1988-08-24 | GTE Products Corporation | Nachgiebiger Einpressstift |
EP0422831A1 (de) * | 1989-10-13 | 1991-04-17 | Minnesota Mining And Manufacturing Company | Einpresskontaktstift |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4230384A (en) * | 1979-03-05 | 1980-10-28 | International Telephone And Telegraph Corporation | Electrical contact |
US4363529A (en) * | 1980-07-25 | 1982-12-14 | Amp Incorporated | Terminal having improved mounting means |
DE8816798U1 (de) * | 1988-02-10 | 1990-09-27 | Harting Elektronik Gmbh, 4992 Espelkamp | Stiftförmiges Kontaktelement zur Befestigung in Leiterplattenbohrungen |
DE19508133C2 (de) * | 1995-03-08 | 1997-02-13 | Kostal Leopold Gmbh & Co Kg | Stiftförmiges Kontaktelement |
-
1997
- 1997-06-12 DE DE19724703A patent/DE19724703C1/de not_active Expired - Lifetime
-
1998
- 1998-05-22 EP EP98934800A patent/EP0988667B1/de not_active Expired - Lifetime
- 1998-05-22 WO PCT/DE1998/001439 patent/WO1998057396A1/de active IP Right Grant
- 1998-05-22 AT AT98934800T patent/ATE213363T1/de not_active IP Right Cessation
- 1998-05-22 DE DE59803073T patent/DE59803073D1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3783433A (en) * | 1971-01-18 | 1974-01-01 | Litton Systems Inc | Solderless electrical connection system |
US4606589A (en) * | 1984-01-12 | 1986-08-19 | H & V Services | Compliant pin |
EP0279061A1 (de) * | 1987-02-20 | 1988-08-24 | GTE Products Corporation | Nachgiebiger Einpressstift |
EP0422831A1 (de) * | 1989-10-13 | 1991-04-17 | Minnesota Mining And Manufacturing Company | Einpresskontaktstift |
Also Published As
Publication number | Publication date |
---|---|
ATE213363T1 (de) | 2002-02-15 |
EP0988667A1 (de) | 2000-03-29 |
EP0988667B1 (de) | 2002-02-13 |
DE59803073D1 (de) | 2002-03-21 |
DE19724703C1 (de) | 1999-02-18 |
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