CA1196072A - Electrical contact assembly - Google Patents
Electrical contact assemblyInfo
- Publication number
- CA1196072A CA1196072A CA000423457A CA423457A CA1196072A CA 1196072 A CA1196072 A CA 1196072A CA 000423457 A CA000423457 A CA 000423457A CA 423457 A CA423457 A CA 423457A CA 1196072 A CA1196072 A CA 1196072A
- Authority
- CA
- Canada
- Prior art keywords
- section
- wire barrel
- electrical
- electrical contact
- receptacle
- 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
- H01R13/15—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
Abstract
ABSTRACT:
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 contact member is frictionally secured in a bore of the wire barrel with the hood member surrounding the receptacle contact member 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.
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 contact member is frictionally secured in a bore of the wire barrel with the hood member surrounding the receptacle contact member 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.
Description
ELECTRICAL CONTAC-r ASSEMBLY
This inverltiorl 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 machtned 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 gokJ plated thereover because they cannot be selectively gold plated. The insertion force when a pin is ins~rted 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 draw~ack is aligning the receptacle and hood and sirnultaneously crimping thern c~nto the wire barrel as properly aligned and concentric ~ernbers. The wire barrel is a screw machine part and, due to its configura~ion, cannot be readily cold formed. The wire barrel would also be subject to breakage when crirnped onto an electrical c~nductor 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 receptac]e. The hood contains no beveled lead in surface for the pin.
According to the present invention, an elec-trical contact assembly comprises a wire barrel onto which an electrical conduc-tor is connected along with a receptacle contact member covered by a hood member. A C~shaped section of the receptacle is fric-tional]y secured in a bore of the wire barrel with the hood mem-ber 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.
More broadly, the present invention provides an elec-trical conLact assembly comprising: a wire barrel member formed as a screw machine member or a cold-formed member and having a rearward section to be terminated to a conductor and bore means extending inwardly from a front end; and an electrical contact member stamped and formed and having a contact section and a securing sectionl said securing section being frictionally dis-posed in said bore means thereby being mechanically secured there~
in in electrical engagement therewith.
The invention will now be described in greater detail with reference to the accompanying drawings, in which:
@ FIGURE 1 is a perspective and exploded view of an elec-- trical contact assembly.
~2~
FIGURE 2 is a perspective view of an assembled electrical contact assembly with an electrical pin contact exploded there-from.
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 con-nector i.n which the electrical contact assemblies are moun-ted.
FIGURE 7 is a cross-sectional view showing the electrical contact assembly secured in an opening of the electrical connec-tor.
Figures 1 through 5 illustrate the electrical con-tact assembly 10 of the present invention with Figure 6 showing an electrical connector EC in -2a-lL ~L4~ 9'~
which th~ electrical contact assemblies are secured for matable connection with a sirnilar electrical connector ~not shown). Electrical contact assembly 10 includes a wirc barrel 12, a receptaclc contact ~-nember 14, anrl a hoocl member 16.
Wire barrel 12 can be a screw machine part or it can be mac~e 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 50 that wire barrel 12 can be cold-formed and it can be readily crimped onto electrical conductor i 8 .
Wire barrel 12 is provided with a bore 20 in which electrical conductor 18 is disposeci for electrical connection therewit~1. A sight hole 22 is located in wire barrel 12 to make certain that electrical conductor 18 has been properiy 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.
F~eceptacle contact member 1 l1 is a stamped and formed rnember that is preferably stamped from beryllium copper and includes a C-shaped section 30 which frictionally engages bore 2B 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 outwarclly therefrom which taper towarcls each other toward the front ends thereof. Contact rnember 14 is selectively plated in the elect~ ;cai colltact area only on the inside sur faces of contact-engaginy members 36 with a heavy ~old plating, ar~d the rest of the contact mernber is flash plated. The selective gold plating can be done on the material before stamping and forminy oF contact member 14 takes place.
~ lood member 16 is a stainless steel cylindrical member which has its inner end crimped into annular recess 26, whereas its front encl has a beveled surface 3B 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 ancl 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 ~old plating because only heavy gold plating takes place on the internal surfaces of contact-en~aging members 36 whereas the rest of contact member 14 and wire barrei 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 wlthdrawal 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 acJainst bloclc LILI and has a passa~eway 51~ ~xtendincJ
therelhrouqh and In which part of the wire barrel of the contact assembly is clisposed ancl alony which part o~ electrical conductor 18 exter-cis; .he diameter of passageway 5LI at the intersection between passageways 42 and 54 is smaller in diameter than passayeway 42 to rnaintain clip rnember 44 in passacJeway 4~. ~\n epoxy material or the like can be placed in passageway 54 to seal the wire barrel and its termination to conductor 18.
This inverltiorl 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 machtned 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 gokJ plated thereover because they cannot be selectively gold plated. The insertion force when a pin is ins~rted 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 draw~ack is aligning the receptacle and hood and sirnultaneously crimping thern c~nto the wire barrel as properly aligned and concentric ~ernbers. The wire barrel is a screw machine part and, due to its configura~ion, cannot be readily cold formed. The wire barrel would also be subject to breakage when crirnped onto an electrical c~nductor 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 receptac]e. The hood contains no beveled lead in surface for the pin.
According to the present invention, an elec-trical contact assembly comprises a wire barrel onto which an electrical conduc-tor is connected along with a receptacle contact member covered by a hood member. A C~shaped section of the receptacle is fric-tional]y secured in a bore of the wire barrel with the hood mem-ber 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.
More broadly, the present invention provides an elec-trical conLact assembly comprising: a wire barrel member formed as a screw machine member or a cold-formed member and having a rearward section to be terminated to a conductor and bore means extending inwardly from a front end; and an electrical contact member stamped and formed and having a contact section and a securing sectionl said securing section being frictionally dis-posed in said bore means thereby being mechanically secured there~
in in electrical engagement therewith.
The invention will now be described in greater detail with reference to the accompanying drawings, in which:
@ FIGURE 1 is a perspective and exploded view of an elec-- trical contact assembly.
~2~
FIGURE 2 is a perspective view of an assembled electrical contact assembly with an electrical pin contact exploded there-from.
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 con-nector i.n which the electrical contact assemblies are moun-ted.
FIGURE 7 is a cross-sectional view showing the electrical contact assembly secured in an opening of the electrical connec-tor.
Figures 1 through 5 illustrate the electrical con-tact assembly 10 of the present invention with Figure 6 showing an electrical connector EC in -2a-lL ~L4~ 9'~
which th~ electrical contact assemblies are secured for matable connection with a sirnilar electrical connector ~not shown). Electrical contact assembly 10 includes a wirc barrel 12, a receptaclc contact ~-nember 14, anrl a hoocl member 16.
Wire barrel 12 can be a screw machine part or it can be mac~e 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 50 that wire barrel 12 can be cold-formed and it can be readily crimped onto electrical conductor i 8 .
Wire barrel 12 is provided with a bore 20 in which electrical conductor 18 is disposeci for electrical connection therewit~1. A sight hole 22 is located in wire barrel 12 to make certain that electrical conductor 18 has been properiy 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.
F~eceptacle contact member 1 l1 is a stamped and formed rnember that is preferably stamped from beryllium copper and includes a C-shaped section 30 which frictionally engages bore 2B 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 outwarclly therefrom which taper towarcls each other toward the front ends thereof. Contact rnember 14 is selectively plated in the elect~ ;cai colltact area only on the inside sur faces of contact-engaginy members 36 with a heavy ~old plating, ar~d the rest of the contact mernber is flash plated. The selective gold plating can be done on the material before stamping and forminy oF contact member 14 takes place.
~ lood member 16 is a stainless steel cylindrical member which has its inner end crimped into annular recess 26, whereas its front encl has a beveled surface 3B 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 ancl 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 ~old plating because only heavy gold plating takes place on the internal surfaces of contact-en~aging members 36 whereas the rest of contact member 14 and wire barrei 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 wlthdrawal 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 acJainst bloclc LILI and has a passa~eway 51~ ~xtendincJ
therelhrouqh and In which part of the wire barrel of the contact assembly is clisposed ancl alony which part o~ electrical conductor 18 exter-cis; .he diameter of passageway 5LI at the intersection between passageways 42 and 54 is smaller in diameter than passayeway 42 to rnaintain clip rnember 44 in passacJeway 4~. ~\n epoxy material or the like can be placed in passageway 54 to seal the wire barrel and its termination to conductor 18.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An electrical contact assembly of the type including a wire barrel member to which an electrical conductor is to be con-nected and a telescoped receptacle contact member and hood member secured onto the wire barrel member characterized in that said wire barrel member is formed as a screw machine member or a cold-formed member having a rearward section to be terminated to a conductor and bore means extending inwardly from a front end;
said receptacle contact member is a stamped and formed member and has a receptacle contact section and a securing section friction-ally secured in said bore means in said wire barrel member; and said hood member has an inner end secured onto said wire barrel member and covering said receptacle contact section.
said receptacle contact member is a stamped and formed member and has a receptacle contact section and a securing section friction-ally secured in said bore means in said wire barrel member; and said hood member has an inner end secured onto said wire barrel member and covering said receptacle contact section.
2. An electrical contact assembly as set forth in claim 1 characterized in that said securing section is C-shaped.
3. An electrical contact assembly as set forth in claim 1 characterized in that said receptacle section has arcuate-shaped contact-engaging members tapering toward each other toward the front end of said hood member.
4. An electrical contact assembly as set forth in claim 3 characterized in that said receptacle section includes a tapered channel-shaped section and a cylindrical section containing said contact-engaging members.
5. An electrical contact assembly as set forth in claim 1 characterized in that said hood member has a beveled inner sur-face at a front end thereof.
6. An electrical contact assembly comprising: a wire barrel member formed as a screw machine member or a cold-formed member and having a rearward section to be terminated to a conductor and bore means extending inwardly from a front end; and an electrical contact member stamped and formed and having a contact section and a securing section, said securing section being frictionally disposed in said bore means thereby being mechanically secured therein in electrical engagement therewith.
7. An electrical contact assembly as set forth in claim 6 wherein said securing section is C-shaped.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US36415382A | 1982-03-31 | 1982-03-31 | |
| US364,153 | 1982-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1196072A true CA1196072A (en) | 1985-10-29 |
Family
ID=23433260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000423457A Expired CA1196072A (en) | 1982-03-31 | 1983-03-11 | Electrical contact assembly |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0090549B1 (en) |
| JP (1) | JPS58209016A (en) |
| CA (1) | CA1196072A (en) |
| DE (1) | DE3372312D1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4780097A (en) * | 1988-01-29 | 1988-10-25 | Amphenol Corporation | Socket contact for an electrical connector |
| DE4024456A1 (en) * | 1990-08-01 | 1992-02-06 | Dunkel Otto Gmbh | Electric spring contact and bush component - has projecting pin for PCB connection with two stamped-out slots and shoulder limiting depth of insertion |
| GB9315160D0 (en) * | 1993-07-22 | 1993-09-08 | Amp Gmbh | Electrical terminal for use with short circuit spring contacts |
| FR2772994B1 (en) * | 1997-12-23 | 2003-06-20 | Cinch Connecteurs Sa | FEMALE ELECTRIC CONTACT MEMBER |
| FR2775389B1 (en) * | 1998-02-24 | 2000-05-05 | Radiall Sa | CONTACT PIN OF AN ELECTRICAL CONNECTOR |
| DE69908953T2 (en) | 1999-11-30 | 2004-05-19 | Preci-Dip Durtal Sa | Contact member for an electrical connector |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1508317A (en) * | 1966-11-23 | 1968-01-05 | Contact device for electrical connectors | |
| US3564487A (en) * | 1969-02-03 | 1971-02-16 | Itt | Contact member for electrical connector |
| 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
Also Published As
| Publication number | Publication date |
|---|---|
| EP0090549A2 (en) | 1983-10-05 |
| EP0090549B1 (en) | 1987-07-01 |
| JPS58209016A (en) | 1983-12-05 |
| DE3372312D1 (en) | 1987-08-06 |
| EP0090549A3 (en) | 1985-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |