EP0090549A2 - Electrical contact assembly - Google Patents
Electrical contact assembly Download PDFInfo
- Publication number
- EP0090549A2 EP0090549A2 EP83301454A EP83301454A EP0090549A2 EP 0090549 A2 EP0090549 A2 EP 0090549A2 EP 83301454 A EP83301454 A EP 83301454A EP 83301454 A EP83301454 A EP 83301454A EP 0090549 A2 EP0090549 A2 EP 0090549A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- wire barrel
- electrical
- receptacle
- electrical contact
- contact assembly
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 abstract description 8
- 230000037431 insertion Effects 0.000 abstract description 8
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 6
- 239000010931 gold Substances 0.000 description 6
- 229910052737 gold Inorganic materials 0.000 description 6
- 238000007747 plating Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Images
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
- H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
- H01R13/187—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket
-
- 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
- H01R13/10—Sockets for co-operation with pins or blades
- H01R13/11—Resilient sockets
- H01R13/111—Resilient sockets co-operating with pins having a circular transverse section
-
- 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
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
- H01R13/42—Securing in a demountable manner
- H01R13/426—Securing by a separate resilient retaining piece supported by base or case, e.g. collar or metal contact-retention clip
Definitions
- This invention relates to electrical connectors and more particularly to an electrical contact assembly for use in electrical connectors.
- a known type of electrical contacts are those that are formed as screw machine parts from bar stock.
- the bar stock from which these electrical contacts are machined has to be hard enough to enable them to be subject to screw machine operations which can present problems when electrical conductors are crimped thereto due to the wire barrels breaking.
- These entire contacts are evenly gold plated thereover because they cannot be selectively gold plated. The insertion force when a pin is inserted thereinto is quite high.
- Another type of known electrical contact assembly includes a screw machine wire barrel onto which is crimped a telescoped receptacle and hood.
- This type of contact can be selectively plated but a major drawback is aligning the receptacle and hood and simultaneously crimping them onto the wire barrel as properly aligned and concentric members.
- the wire barrel is a screw machine part and, due to its configuration, cannot be readily cold formed.
- the wire barrel would also be subject to breakage when crimped onto an electrical conductor because of the hardness of the metal if not subjected to annealing. The insertion force is not believed to be too low. Crimping of the receptacle onto the wire barrel does not provide a good mechanical and electrical connection and limits the diameter of the receptacle.
- the hood contains no beveled lead-in surface for the pin.
- an electrical contact assembly comprises a wire barrel onto which an electrical conductor is connected along with a receptacle contact member covered by a hood member.
- a C-shaped section of the receptacle is frictionally secured in a bore of the wire barrel with the hood member surrounding the receptacle and being crimped onto the wire barrel.
- the hood has a beveled lead-in entrance to facilitate insertion of a pin contact member into electrical connection with the receptacle contact member at a substantially low insertion force.
- Figures 1 through 5 illustrate the electrical contact assembly 10 of the present invention with Figure 6 showing an electrical connector EC in which the electrical contact assemblies are secured for matable connection with a similar electrical connector (not shown).
- Electrical contact assembly 10 includes a wire barrel 12, a receptacle contact member 14, and a hood member 16.
- Wire barrel 12 can be a screw machine part or it can be made in accordance with cold-forming techniques in accordance with conventional practices. If wire barrel 12 is made as a screw machine part, copper alloy material is used, whereas if it is formed in accordance with cold-forming techniques, soft copper is used. It is preferable that soft copper be used so that wire barrel 12 can be cold-formed and it can be readily crimped onto electrical conductor 18.
- Wire barrel 12 is provided with a bore 20 in which electrical conductor 18 is disposed for electrical connection therewith.
- a sight hole 22 is located in wire barrel 12 to make certain that electrical conductor 18 has been properly positioned within bore 20 prior to it being connected thereto.
- An annular shoulder 24 is located adjacent the front end of wire barrel 12 next to annular recess 26.
- a bore 28 extends inwardly from the front end of wire barrel 12.
- Receptacle contact member 14 is a stamped and formed member that is preferably stamped from beryllium copper and includes a C-shaped section 30 which frictionally engages bore 28 of wire barrel 12 to form an excellent mechanical and electrical connection therewith thereby securing contact member 14 therewithin.
- the resilient characteristics of C-shaped section 30 adds to the retention characteristics of C-shaped section 30 in bore 28.
- Tapered channel-shaped section 32 extends between C-shaped section 30 and cylindrical section 34 and has arcuate-shaped contact-engaging members 36 extending outwardly therefrom which taper towards each other toward the front ends thereof.
- Contact member 14 is selectively plated in the electrical contact area only on the inside surfaces of contact-engaging members 36 with a heavy gold plating, and the rest of the contact member is flash plated. The selective gold plating can be done on the material before stamping and forming of contact member 14 takes place.
- Hood member 16 is a stainless steel cylindrical member which has its inner end crimped into annular recess 26, whereas its front end has a beveled surface 38 for facilitating insertion of pin contact member 40 into electrical contact with receptacle contact member 14. Hood member 16 protects contact member 14 and prevents spring contact-engaging members 36 from being overstressed.
- the electrical contact assembly of the present invention has a low insertion force because receptacle contact member 14 is a stamped and formed part. This is a significant factor when a large number of receptacle contact members are to be electrically connected with pin contact members. Another important factor is the saving that takes place on selective gold plating because only heavy gold plating takes place on the internal surfaces of contact-engaging members 36 whereas the rest of contact member 14 and wire barrel 12 are flash plated.
- Figure 7 illustrates electrical contact assembly 10 secured in a passageway 42 in dielectric mounting block 44 of electrical connector EC by means of lances 46 of clip member 48 engaging shoulder 24 to prevent withdrawal of contact assembly 10.
- Shoulder 24 is limited in its inner movement within passageway 42 by surface 50 interposed between the larger and smaller diameter sections of passageway 42.
- Another dielectric block 52 abuts against block 44 and has a passageway 54 extending therethrough and in which part of the wire barrel of the contact assembly is disposed and along which part of electrical conductor 18 extends; the diameter of passageway 54 at the intersection between passageways 42 and 54 is smaller in diameter than passageway 42 to maintain clip member 44 in passageway 42.
- An epoxy material or the like can be placed in passageway 54 to seal the wire barrel and its termination to conductor 18.
Landscapes
- Connector Housings Or Holding Contact Members (AREA)
- Multi-Conductor Connections (AREA)
Abstract
Description
- This invention relates to electrical connectors and more particularly to an electrical contact assembly for use in electrical connectors.
- A known type of electrical contacts are those that are formed as screw machine parts from bar stock. The bar stock from which these electrical contacts are machined has to be hard enough to enable them to be subject to screw machine operations which can present problems when electrical conductors are crimped thereto due to the wire barrels breaking. These entire contacts are evenly gold plated thereover because they cannot be selectively gold plated. The insertion force when a pin is inserted thereinto is quite high.
- Another type of known electrical contact assembly includes a screw machine wire barrel onto which is crimped a telescoped receptacle and hood. This type of contact can be selectively plated but a major drawback is aligning the receptacle and hood and simultaneously crimping them onto the wire barrel as properly aligned and concentric members. The wire barrel is a screw machine part and, due to its configuration, cannot be readily cold formed. The wire barrel would also be subject to breakage when crimped onto an electrical conductor because of the hardness of the metal if not subjected to annealing. The insertion force is not believed to be too low. Crimping of the receptacle onto the wire barrel does not provide a good mechanical and electrical connection and limits the diameter of the receptacle. The hood contains no beveled lead-in surface for the pin.
- According to the present invention, an electrical contact assembly comprises a wire barrel onto which an electrical conductor is connected along with a receptacle contact member covered by a hood member. A C-shaped section of the receptacle is frictionally secured in a bore of the wire barrel with the hood member surrounding the receptacle and being crimped onto the wire barrel. The hood has a beveled lead-in entrance to facilitate insertion of a pin contact member into electrical connection with the receptacle contact member at a substantially low insertion force.
- FIGURE 1 is a perspective and exploded view of an electrical contact assembly.
- FIGURE 2 is a perspective view of an assembled electrical contact assembly with an electrical pin contact exploded therefrom.
- FIGURE 3 is a cross-sectional view of the assembled electrical contact assembly.
- FIGURE 4 is a cross-sectional view taken along line 4-4 of Figure 1.
- FIGURE 5 is a cross-sectional view taken along line 5-5 of Figure 3.
- FIGURE 6 is a perspective view showing an electrical connector in which the electrical contact assemblies are mounted.
- FIGURE 7 is a cross-sectional view showing the electrical contact assembly secured in an opening of the electrical connector.
- Figures 1 through 5 illustrate the
electrical contact assembly 10 of the present invention with Figure 6 showing an electrical connector EC in which the electrical contact assemblies are secured for matable connection with a similar electrical connector (not shown).Electrical contact assembly 10 includes awire barrel 12, areceptacle contact member 14, and ahood member 16. -
Wire barrel 12 can be a screw machine part or it can be made in accordance with cold-forming techniques in accordance with conventional practices. Ifwire barrel 12 is made as a screw machine part, copper alloy material is used, whereas if it is formed in accordance with cold-forming techniques, soft copper is used. It is preferable that soft copper be used so thatwire barrel 12 can be cold-formed and it can be readily crimped ontoelectrical conductor 18. -
Wire barrel 12 is provided with abore 20 in whichelectrical conductor 18 is disposed for electrical connection therewith. Asight hole 22 is located inwire barrel 12 to make certain thatelectrical conductor 18 has been properly positioned withinbore 20 prior to it being connected thereto. Anannular shoulder 24 is located adjacent the front end ofwire barrel 12 next toannular recess 26. Abore 28 extends inwardly from the front end ofwire barrel 12. -
Receptacle contact member 14 is a stamped and formed member that is preferably stamped from beryllium copper and includes a C-shaped section 30 which frictionally engages bore 28 ofwire barrel 12 to form an excellent mechanical and electrical connection therewith thereby securingcontact member 14 therewithin. The resilient characteristics of C-shaped section 30 adds to the retention characteristics of C-shaped section 30 inbore 28. Tapered channel-shaped section 32 extends between C-shaped section 30 andcylindrical section 34 and has arcuate-shaped contact-engaging members 36 extending outwardly therefrom which taper towards each other toward the front ends thereof.Contact member 14 is selectively plated in the electrical contact area only on the inside surfaces of contact-engagingmembers 36 with a heavy gold plating, and the rest of the contact member is flash plated. The selective gold plating can be done on the material before stamping and forming ofcontact member 14 takes place. - Hood
member 16 is a stainless steel cylindrical member which has its inner end crimped intoannular recess 26, whereas its front end has abeveled surface 38 for facilitating insertion ofpin contact member 40 into electrical contact withreceptacle contact member 14. Hoodmember 16 protectscontact member 14 and prevents spring contact-engagingmembers 36 from being overstressed. - The electrical contact assembly of the present invention has a low insertion force because
receptacle contact member 14 is a stamped and formed part. This is a significant factor when a large number of receptacle contact members are to be electrically connected with pin contact members. Another important factor is the saving that takes place on selective gold plating because only heavy gold plating takes place on the internal surfaces of contact-engagingmembers 36 whereas the rest ofcontact member 14 andwire barrel 12 are flash plated. - Figure 7 illustrates
electrical contact assembly 10 secured in apassageway 42 indielectric mounting block 44 of electrical connector EC by means oflances 46 ofclip member 48 engagingshoulder 24 to prevent withdrawal ofcontact assembly 10.Shoulder 24 is limited in its inner movement withinpassageway 42 bysurface 50 interposed between the larger and smaller diameter sections ofpassageway 42. Anotherdielectric block 52 abuts againstblock 44 and has apassageway 54 extending therethrough and in which part of the wire barrel of the contact assembly is disposed and along which part ofelectrical conductor 18 extends; the diameter ofpassageway 54 at the intersection betweenpassageways passageway 42 to maintainclip member 44 inpassageway 42. An epoxy material or the like can be placed inpassageway 54 to seal the wire barrel and its termination toconductor 18.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36415382A | 1982-03-31 | 1982-03-31 | |
US364153 | 1999-07-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0090549A2 true EP0090549A2 (en) | 1983-10-05 |
EP0090549A3 EP0090549A3 (en) | 1985-08-07 |
EP0090549B1 EP0090549B1 (en) | 1987-07-01 |
Family
ID=23433260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19830301454 Expired EP0090549B1 (en) | 1982-03-31 | 1983-03-16 | Electrical contact assembly |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0090549B1 (en) |
JP (1) | JPS58209016A (en) |
CA (1) | CA1196072A (en) |
DE (1) | DE3372312D1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0326447A2 (en) * | 1988-01-29 | 1989-08-02 | Amphenol Corporation | Socket contact for an electrical connector |
EP0471971A1 (en) * | 1990-08-01 | 1992-02-26 | Otto Dunkel Gmbh Fabrik Für Elektrotechnische Geräte | Pin-socket unit |
EP0635904A2 (en) * | 1993-07-22 | 1995-01-25 | The Whitaker Corporation | Electrical terminal for use with short circuit spring contacts |
FR2772994A1 (en) * | 1997-12-23 | 1999-06-25 | Cinch Connecteurs Sa | FEMALE ELECTRIC CONTACT MEMBER |
FR2775389A1 (en) * | 1998-02-24 | 1999-08-27 | Radiall Sa | Electrical contact terminal for multi-terminal connector |
EP1107378A1 (en) * | 1999-11-30 | 2001-06-13 | Preci-Dip Durtal SA | Contact member for an electrical connector |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE705639A (en) * | 1966-11-23 | 1968-03-01 | ||
FR2031260A5 (en) * | 1969-02-03 | 1970-11-13 | Int Standard Electric Corp | |
FR2507021A1 (en) * | 1981-06-01 | 1982-12-03 | Itt Composants Instr | SLEEVE FOR FEMALE ELECTRIC CONTACT AND MANUFACTURING METHOD FOR OBTAINING SAME |
-
1983
- 1983-03-11 CA CA000423457A patent/CA1196072A/en not_active Expired
- 1983-03-16 EP EP19830301454 patent/EP0090549B1/en not_active Expired
- 1983-03-16 DE DE8383301454T patent/DE3372312D1/en not_active Expired
- 1983-03-31 JP JP5675783A patent/JPS58209016A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE705639A (en) * | 1966-11-23 | 1968-03-01 | ||
FR2031260A5 (en) * | 1969-02-03 | 1970-11-13 | Int Standard Electric Corp | |
FR2507021A1 (en) * | 1981-06-01 | 1982-12-03 | Itt Composants Instr | SLEEVE FOR FEMALE ELECTRIC CONTACT AND MANUFACTURING METHOD FOR OBTAINING SAME |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0326447A2 (en) * | 1988-01-29 | 1989-08-02 | Amphenol Corporation | Socket contact for an electrical connector |
EP0326447A3 (en) * | 1988-01-29 | 1991-07-17 | Amphenol Corporation | Socket contact for an electrical connector |
EP0471971A1 (en) * | 1990-08-01 | 1992-02-26 | Otto Dunkel Gmbh Fabrik Für Elektrotechnische Geräte | Pin-socket unit |
EP0635904A2 (en) * | 1993-07-22 | 1995-01-25 | The Whitaker Corporation | Electrical terminal for use with short circuit spring contacts |
EP0635904A3 (en) * | 1993-07-22 | 1996-04-03 | Whitaker Corp | Electrical terminal for use with short circuit spring contacts. |
KR100332892B1 (en) * | 1993-07-22 | 2002-11-27 | 더 휘태커 코포레이션 | Electric terminal |
EP0926766A1 (en) * | 1997-12-23 | 1999-06-30 | Connecteurs Cinch | Electrical female contact member |
FR2772994A1 (en) * | 1997-12-23 | 1999-06-25 | Cinch Connecteurs Sa | FEMALE ELECTRIC CONTACT MEMBER |
FR2775389A1 (en) * | 1998-02-24 | 1999-08-27 | Radiall Sa | Electrical contact terminal for multi-terminal connector |
WO1999044261A1 (en) * | 1998-02-24 | 1999-09-02 | Radiall | Electrical connector contact pin |
US6475039B1 (en) | 1998-02-24 | 2002-11-05 | Radiall | Electrical connector contact pin |
EP1107378A1 (en) * | 1999-11-30 | 2001-06-13 | Preci-Dip Durtal SA | Contact member for an electrical connector |
US6264508B1 (en) | 1999-11-30 | 2001-07-24 | Preci-Dip Durtal Sa | Female type contact piece enabling electrical contact with a male element |
Also Published As
Publication number | Publication date |
---|---|
EP0090549B1 (en) | 1987-07-01 |
JPS58209016A (en) | 1983-12-05 |
EP0090549A3 (en) | 1985-08-07 |
CA1196072A (en) | 1985-10-29 |
DE3372312D1 (en) | 1987-08-06 |
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