CA1320996C - Environmentally protected emi shielded connector - Google Patents
Environmentally protected emi shielded connectorInfo
- Publication number
- CA1320996C CA1320996C CA000615454A CA615454A CA1320996C CA 1320996 C CA1320996 C CA 1320996C CA 000615454 A CA000615454 A CA 000615454A CA 615454 A CA615454 A CA 615454A CA 1320996 C CA1320996 C CA 1320996C
- Authority
- CA
- Canada
- Prior art keywords
- shell
- plug
- connector
- sleeve
- housing
- 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 - Fee Related
Links
- 239000004033 plastic Substances 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000003989 dielectric material Substances 0.000 claims description 5
- 230000000712 assembly Effects 0.000 abstract description 8
- 238000000429 assembly Methods 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000000945 filler Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6591—Specific features or arrangements of connection of shield to conductive members
- H01R13/65912—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable
-
- 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
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6581—Shield structure
-
- 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
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
-
- 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
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6581—Shield structure
- H01R13/6582—Shield structure with resilient means for engaging mating connector
- H01R13/6583—Shield structure with resilient means for engaging mating connector with separate conductive resilient members between mating shield members
- H01R13/6584—Shield structure with resilient means for engaging mating connector with separate conductive resilient members between mating shield members formed by conductive elastomeric members, e.g. flat gaskets or O-rings
-
- 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
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6591—Specific features or arrangements of connection of shield to conductive members
- H01R13/65912—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable
- H01R13/65918—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable wherein each conductor is individually surrounded by shield
-
- 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
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6591—Specific features or arrangements of connection of shield to conductive members
- H01R13/6592—Specific features or arrangements of connection of shield to conductive members the conductive member being a shielded cable
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
ENVIRONMENTALLY PROTECTED EMI SHIELDED CONNECTOR
ABSTRACT
An EMI shielded connector is provided having an exterior receptacle shell, plug housing and coupling member constructed of plastic. Metallic sleeves line the shell and housing interiors and enclose insert assemblies. The sleeves are releasably engaged at a joint connection to provide electrical continuity through the connector for EMI protection. A junction means may be used to enhance electrical communication at the joint connection and a sealing member is used for environmental protection of the connector interior parts.
ABSTRACT
An EMI shielded connector is provided having an exterior receptacle shell, plug housing and coupling member constructed of plastic. Metallic sleeves line the shell and housing interiors and enclose insert assemblies. The sleeves are releasably engaged at a joint connection to provide electrical continuity through the connector for EMI protection. A junction means may be used to enhance electrical communication at the joint connection and a sealing member is used for environmental protection of the connector interior parts.
Description
~32~
ENVIRONMENTALLY PROTECTED EMI S~IELDED CONN~CTOR
BACKGROUND OF THE INVENTION
Field of the Invention The invention relates to electrical connectors and, more particularly, to EMI shielded connectors which include protection against harsh corrosive conditions.
Descrlption of the Prior Art Effective connectors should be mechanically strong, light weight, low cost, corrosion resistant and display high levels of EMI shielding. In general, good EMI shielding comes from metals. Aluminum and its alloys have always been good choices because they are lightweight, highly conductive and readily machined into parts. Unfortunately, aluminum is also chemically reactive and is prone to significantly corrode in harsh environments.
Because of the above problems, composite plastic materials have been employed to form the connector housing. Since plastic is non-conductive, fillers were used to provide some degree of EMI
shielding. Great difficulty was incurred, however, in reating a sufficiently homogenous mixture of filler to provide effective shielding. This was because molding processes do not allow the necessary even distribution and physical contact between filler particles for achieving the desired overall conductivity.
~ n alternative to the composite plastic approach is shown in U.S. Patent No. 4,678,260. Here, a foraminous sleeve of metal or wire mesh is embedded in ~`
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~32~
the molded plastic housing. A portion o~ the sleeve is exposed to provide contact with other conductive parts which lead to a ground plane.
Difficulty with this approach is that sleeve openings or mesh size directly af~ect khe frequency level of E~I that can be effectively attenuated. Such a restriction greatly limits the usefulness of the device.
SUMMARY OF THE INVENTION
The present invention provides an EMI shielded electrical connector for terminating EMI shielded wires, the connector comprising: a plug housing constructed of a dielectric material having an outer end, a midportion and an inner end, the housing including a plug inner surface and a plug exterior surface; an electrically conductive plug sleeve located adjacent the inner surface having a forward section extending from proximate the outer end to a plug joint section proximate the midportion: a receptacle shell constructed of dielectric material adapted for engagement with the plug housing having an outer end portion and an inner end portion with a shell inner surface and shell outer surface; and, an electrically conductive shell sleeve located adjacent the shell inner surface having an outer part extending from proximate the outer end portion to a shell joint part, the shell joint part and the plug joint section forming a joint connectlon at a location proximate the plug housing midportion when the plug housing and receptacle shell are engaged.
In another aspect, the present invention provides an electrical connector comprising a plastic receptacle shell releasably engaged with a plastic plug ., - . . . ~ , ~ ' , , :
: : .
:~ 3 ~
housing, the housing having an outer end, a midportion and an inner end, the receptacle shell having an outer end portion and an inner end portion, the housing and shell each enclosing an insert containing means for terminating one or more cables, the shell having an inner metallic shell sleeve that includes a shell joint part, the housing having an inner metallic plug sleeve with a plug joint section located proximate the midportion, the sleeves being engaged at a joint connection proximate the midportion.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a fragmentary cross-sectional view showing the plug housing and receptacle shell assemblies of the invention connected together.
Fig. 2 is a fragmentary cross-sectional view showing the assemblies of Fig. 1 separated from each other.
Fig. 3 is a fragmentary cross-sectional view showing an alternative shielded cable connection to a modified receptacle snell assembly.
Fig. 4 is a view similar to Fig. ~ showing a second alternative shielded cable connection.
Fig. 5 is a fragmentary cross-sectional view showing a receptacle shell grounded to a panel.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
With particular reference to Figs. 1 and 2 of the drawings, the overall connector of the invention is shown by reference 10. The connector is preferably tubular in shape and consists of a plug housing assembly j !
, ", ~2~
12 and a shell assembly 14. Both assemblies releasably interfit with each other and are secured together with a coupling member 16. The plug housing assembly consists of a plug insert 45 enclosed by a plug housing 13 and the shell assembly consists of a shell insert 28 enclosed by a receptacle shell 15.
The receptacle shell is defined by an inner surface 17, an outer surface 18 with a inner end portion 19 and an outer end portion 20. The outer surface may include an outer flange 21 for use in attaching the shell to a cabinet panel or other grounded external support structure. It also includes one or more bosses 22 for connection with lip 23 of coupling member 16 for securing together the shell and plug assemblies.
The plug housing, receptacle shell and coupling member are constructed of a dielectric material such as plastic. This permits the use of low cost high volume manufacturing processes such as injection molding.
I,ocated adjacent the shell inner surface is an electrically conductive shell sleeve 24. The shell sleeve includes an outer part 25 proximate outer end portion 20 and extends inwardly to a shell joint part 26.
The shell joint part extends beyond the end of inner end portion 19.
~5 The shell sleeve is constructed of metal and provides a generally uniform interior diameter for enclosing shel] insert 28. As shown, outer part 25 is threadably attached to the shell sleeve main body 27 to facilitate securement by abutment with insert rib member 29.
The plug housing 13 is defined by an outer end 30, a midportion 31 and an inner end 32. It includes a plug inner surface 33 and an exterior sur~ace 34. The , , :
1~2B99~ ~
exterior surface provides plug thread means 35 for engagement with corresponding means on coupling member 16.
Positioned adjacent plug inner surface 33 is an electrically conductive plug sleeve 40. The plug sleeve provides a generally uniform interior diameter for enclosing plug insert 45. It includes a forward section 42 which is proximate outer end 30 and extends inwardly to a plug joint section 44 proximate the housing midportion 31. In the same manner as with the shell sleeve, forward section 42 may be threadablv attached to plug sleeve main body 43. This provides a convenient means for securement of plug insert 45 via abutment with insert rib 46.
When the plug housing and receptacle shell are connected, a joint is formed between the shell joint part 26 and plug joint section 44. This provides electrical communication between the respective sleeves and shields the insert assemblies from EMI. The joint connection shown in the drawings may be referenced as a lap joint, but other joint connections known in the art may be used suh as bayonet, twist lock, threads and the like.
With reference to the joint shown in Figs. 1 and 2, the plug housing inner surface 33 is offset radially outward proximate midportion 31. This accommodates a similar offset in plug sleeve 40 and allows the plug joint section to have a diameter greater than shell joint part 26. Note that the shell ~oint part extends axially from the sleeve main body with only a minor radially outward enlargement at its free end. As such, when the plug and receptacle assemblies are moved toyether, shown by arrows A in Fig. 2, the shell joint part will slide over and overlap the plug joint section.
:: : , - ; : -., ~
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- . -- ~- :
~ ~2Q~
To help insure good electrical communication at the joint connection, a junction means may be used.
This may comprise an electrically conductive ring member overlying at least a portion o~ the plug joint section.
As shown, the ring member comprises a metallic spring washer 48 forming an annular interface between the plug joint section and shell joint part.
The plug housing inner surface 33 further includes an annular recess 50 located outwardly from adjacent the joint connection and proximate i.nner end 32. The recess is adapted to accommodake a resili~nt environmental sealing member shown as O-ring 52. The sealing member is sized to resiliently engage the outer surface of shell joint part 26 to prevent unwanted contamination of the assembled parts.
In a manner known in the art, the insert assemblies primarily comprise a plastic body containing pin or socket contacts for terminating wires from cables.
~s shown, shell insert 28 terminates wires 5~ which are in electrical communication with socket contacts 56~
Plug insert 45 terminates wires 55 which electrically communicate with pin contacts 57. The pin contacts engage the socket contacts providing electrical continuity through the connector.
If the wires are assembled within a grounded outer conductive sheath for EMI protection, the sheath must be electrically connected to the sleeves of the plug housing and receptacle shell. As shown in Fig. 3, braided metal sheath 60 engages extended shell sleeve outer part 61. The sheath end overlies annular notch 62 and is secured therein by clamping means shown as shrink band 6~. An identical arrangement is used to secure a grounded conductive sheath around plug wires 55 to an -' . ' - ' ~ '';'"' :
1~2~9~
extended plug sleeve forward section (not shown). Other sheath connection means may be used such as those shown in U.S. Patent Nos. 4,579,415 and 4,468,080 which are herein incorporated by refer~nce.
With reference to Fig. 4, individual wires are shown as being protected with electrically conductive sheathes 66. In this case, each sheath is terminated with an insert part 67 which, in turn, engages correspondiny openings in a ground plane shown as shell plate 68. The plate overlies the outer face of shell insert 28 and is in electrical communication with extended shell sleeve outer part 61'. The shell plate is retained within the shell sleeve by leg projections 69 which frictionally engage corresponding grooves about the interior surface of outer part 61'. A plug face plate grounding plane identically arranged is utilized with the plug housing outer end. The combined face plates and sleeves provide continuous EMI shielding throughout the overall connector and wire connections.
Fig. 5 depicts grounding of the shell sleeve to an external support structure. This is accomplished with a grounding panel engagement means shown as jam-nut connector 71~ The connector is constructed of conductive material and includes an inner ring portion that directly engages the shell sleeve parts. Spaced outwardly is an integral radial flange 72 having an outer annular lip 73.
The lip has an end face 74 that enyayes bulkhead panel 75 and provides electrical communication from the receptacle shell to the grounded panel. Optionally, the end face may include one or more scratch points 76 to help insure electrical contack with the panel.
In place of outer flange 21, receptacle shell 15 is modified to coact with the jam-nut connector by , .
3~
providing an outer retainer section 70. This section includes a distal flange 77 which is spaced from lip 73 to allow for placement of a panel 0-ring seal 78. The retainer sPction is plastic and generally overlies the metal jam-nut connector for environmental protectionO
Jam-nut 79 engages threads 80 and functions to secure the overall assembly to the bulkhead panel.
In addition to the above-described embodiment, it will be appreciated that other panel engagement means could be used. For example, simple wires, conductive strips, metal plating on the shell receptacle exterior or conductors embedded within the molded shell receptacle could function to provide a grounding path from the shell sleeves.
While the invention has been described with respect to a preferred embodiment, it will be apparent to those skilled in the art that various modifications and improvements may be made without departing from the scope and spirit of the invention. Accordingly, it is to be understood that the invention is not to be limited by the specific illustrative embodiments, but only by the scope of the appended claims.
~ , , ' .:
~ . ;
: .
ENVIRONMENTALLY PROTECTED EMI S~IELDED CONN~CTOR
BACKGROUND OF THE INVENTION
Field of the Invention The invention relates to electrical connectors and, more particularly, to EMI shielded connectors which include protection against harsh corrosive conditions.
Descrlption of the Prior Art Effective connectors should be mechanically strong, light weight, low cost, corrosion resistant and display high levels of EMI shielding. In general, good EMI shielding comes from metals. Aluminum and its alloys have always been good choices because they are lightweight, highly conductive and readily machined into parts. Unfortunately, aluminum is also chemically reactive and is prone to significantly corrode in harsh environments.
Because of the above problems, composite plastic materials have been employed to form the connector housing. Since plastic is non-conductive, fillers were used to provide some degree of EMI
shielding. Great difficulty was incurred, however, in reating a sufficiently homogenous mixture of filler to provide effective shielding. This was because molding processes do not allow the necessary even distribution and physical contact between filler particles for achieving the desired overall conductivity.
~ n alternative to the composite plastic approach is shown in U.S. Patent No. 4,678,260. Here, a foraminous sleeve of metal or wire mesh is embedded in ~`
..
: , .
~32~
the molded plastic housing. A portion o~ the sleeve is exposed to provide contact with other conductive parts which lead to a ground plane.
Difficulty with this approach is that sleeve openings or mesh size directly af~ect khe frequency level of E~I that can be effectively attenuated. Such a restriction greatly limits the usefulness of the device.
SUMMARY OF THE INVENTION
The present invention provides an EMI shielded electrical connector for terminating EMI shielded wires, the connector comprising: a plug housing constructed of a dielectric material having an outer end, a midportion and an inner end, the housing including a plug inner surface and a plug exterior surface; an electrically conductive plug sleeve located adjacent the inner surface having a forward section extending from proximate the outer end to a plug joint section proximate the midportion: a receptacle shell constructed of dielectric material adapted for engagement with the plug housing having an outer end portion and an inner end portion with a shell inner surface and shell outer surface; and, an electrically conductive shell sleeve located adjacent the shell inner surface having an outer part extending from proximate the outer end portion to a shell joint part, the shell joint part and the plug joint section forming a joint connectlon at a location proximate the plug housing midportion when the plug housing and receptacle shell are engaged.
In another aspect, the present invention provides an electrical connector comprising a plastic receptacle shell releasably engaged with a plastic plug ., - . . . ~ , ~ ' , , :
: : .
:~ 3 ~
housing, the housing having an outer end, a midportion and an inner end, the receptacle shell having an outer end portion and an inner end portion, the housing and shell each enclosing an insert containing means for terminating one or more cables, the shell having an inner metallic shell sleeve that includes a shell joint part, the housing having an inner metallic plug sleeve with a plug joint section located proximate the midportion, the sleeves being engaged at a joint connection proximate the midportion.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a fragmentary cross-sectional view showing the plug housing and receptacle shell assemblies of the invention connected together.
Fig. 2 is a fragmentary cross-sectional view showing the assemblies of Fig. 1 separated from each other.
Fig. 3 is a fragmentary cross-sectional view showing an alternative shielded cable connection to a modified receptacle snell assembly.
Fig. 4 is a view similar to Fig. ~ showing a second alternative shielded cable connection.
Fig. 5 is a fragmentary cross-sectional view showing a receptacle shell grounded to a panel.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
With particular reference to Figs. 1 and 2 of the drawings, the overall connector of the invention is shown by reference 10. The connector is preferably tubular in shape and consists of a plug housing assembly j !
, ", ~2~
12 and a shell assembly 14. Both assemblies releasably interfit with each other and are secured together with a coupling member 16. The plug housing assembly consists of a plug insert 45 enclosed by a plug housing 13 and the shell assembly consists of a shell insert 28 enclosed by a receptacle shell 15.
The receptacle shell is defined by an inner surface 17, an outer surface 18 with a inner end portion 19 and an outer end portion 20. The outer surface may include an outer flange 21 for use in attaching the shell to a cabinet panel or other grounded external support structure. It also includes one or more bosses 22 for connection with lip 23 of coupling member 16 for securing together the shell and plug assemblies.
The plug housing, receptacle shell and coupling member are constructed of a dielectric material such as plastic. This permits the use of low cost high volume manufacturing processes such as injection molding.
I,ocated adjacent the shell inner surface is an electrically conductive shell sleeve 24. The shell sleeve includes an outer part 25 proximate outer end portion 20 and extends inwardly to a shell joint part 26.
The shell joint part extends beyond the end of inner end portion 19.
~5 The shell sleeve is constructed of metal and provides a generally uniform interior diameter for enclosing shel] insert 28. As shown, outer part 25 is threadably attached to the shell sleeve main body 27 to facilitate securement by abutment with insert rib member 29.
The plug housing 13 is defined by an outer end 30, a midportion 31 and an inner end 32. It includes a plug inner surface 33 and an exterior sur~ace 34. The , , :
1~2B99~ ~
exterior surface provides plug thread means 35 for engagement with corresponding means on coupling member 16.
Positioned adjacent plug inner surface 33 is an electrically conductive plug sleeve 40. The plug sleeve provides a generally uniform interior diameter for enclosing plug insert 45. It includes a forward section 42 which is proximate outer end 30 and extends inwardly to a plug joint section 44 proximate the housing midportion 31. In the same manner as with the shell sleeve, forward section 42 may be threadablv attached to plug sleeve main body 43. This provides a convenient means for securement of plug insert 45 via abutment with insert rib 46.
When the plug housing and receptacle shell are connected, a joint is formed between the shell joint part 26 and plug joint section 44. This provides electrical communication between the respective sleeves and shields the insert assemblies from EMI. The joint connection shown in the drawings may be referenced as a lap joint, but other joint connections known in the art may be used suh as bayonet, twist lock, threads and the like.
With reference to the joint shown in Figs. 1 and 2, the plug housing inner surface 33 is offset radially outward proximate midportion 31. This accommodates a similar offset in plug sleeve 40 and allows the plug joint section to have a diameter greater than shell joint part 26. Note that the shell ~oint part extends axially from the sleeve main body with only a minor radially outward enlargement at its free end. As such, when the plug and receptacle assemblies are moved toyether, shown by arrows A in Fig. 2, the shell joint part will slide over and overlap the plug joint section.
:: : , - ; : -., ~
.. : . ,: . . - . :
- . -- ~- :
~ ~2Q~
To help insure good electrical communication at the joint connection, a junction means may be used.
This may comprise an electrically conductive ring member overlying at least a portion o~ the plug joint section.
As shown, the ring member comprises a metallic spring washer 48 forming an annular interface between the plug joint section and shell joint part.
The plug housing inner surface 33 further includes an annular recess 50 located outwardly from adjacent the joint connection and proximate i.nner end 32. The recess is adapted to accommodake a resili~nt environmental sealing member shown as O-ring 52. The sealing member is sized to resiliently engage the outer surface of shell joint part 26 to prevent unwanted contamination of the assembled parts.
In a manner known in the art, the insert assemblies primarily comprise a plastic body containing pin or socket contacts for terminating wires from cables.
~s shown, shell insert 28 terminates wires 5~ which are in electrical communication with socket contacts 56~
Plug insert 45 terminates wires 55 which electrically communicate with pin contacts 57. The pin contacts engage the socket contacts providing electrical continuity through the connector.
If the wires are assembled within a grounded outer conductive sheath for EMI protection, the sheath must be electrically connected to the sleeves of the plug housing and receptacle shell. As shown in Fig. 3, braided metal sheath 60 engages extended shell sleeve outer part 61. The sheath end overlies annular notch 62 and is secured therein by clamping means shown as shrink band 6~. An identical arrangement is used to secure a grounded conductive sheath around plug wires 55 to an -' . ' - ' ~ '';'"' :
1~2~9~
extended plug sleeve forward section (not shown). Other sheath connection means may be used such as those shown in U.S. Patent Nos. 4,579,415 and 4,468,080 which are herein incorporated by refer~nce.
With reference to Fig. 4, individual wires are shown as being protected with electrically conductive sheathes 66. In this case, each sheath is terminated with an insert part 67 which, in turn, engages correspondiny openings in a ground plane shown as shell plate 68. The plate overlies the outer face of shell insert 28 and is in electrical communication with extended shell sleeve outer part 61'. The shell plate is retained within the shell sleeve by leg projections 69 which frictionally engage corresponding grooves about the interior surface of outer part 61'. A plug face plate grounding plane identically arranged is utilized with the plug housing outer end. The combined face plates and sleeves provide continuous EMI shielding throughout the overall connector and wire connections.
Fig. 5 depicts grounding of the shell sleeve to an external support structure. This is accomplished with a grounding panel engagement means shown as jam-nut connector 71~ The connector is constructed of conductive material and includes an inner ring portion that directly engages the shell sleeve parts. Spaced outwardly is an integral radial flange 72 having an outer annular lip 73.
The lip has an end face 74 that enyayes bulkhead panel 75 and provides electrical communication from the receptacle shell to the grounded panel. Optionally, the end face may include one or more scratch points 76 to help insure electrical contack with the panel.
In place of outer flange 21, receptacle shell 15 is modified to coact with the jam-nut connector by , .
3~
providing an outer retainer section 70. This section includes a distal flange 77 which is spaced from lip 73 to allow for placement of a panel 0-ring seal 78. The retainer sPction is plastic and generally overlies the metal jam-nut connector for environmental protectionO
Jam-nut 79 engages threads 80 and functions to secure the overall assembly to the bulkhead panel.
In addition to the above-described embodiment, it will be appreciated that other panel engagement means could be used. For example, simple wires, conductive strips, metal plating on the shell receptacle exterior or conductors embedded within the molded shell receptacle could function to provide a grounding path from the shell sleeves.
While the invention has been described with respect to a preferred embodiment, it will be apparent to those skilled in the art that various modifications and improvements may be made without departing from the scope and spirit of the invention. Accordingly, it is to be understood that the invention is not to be limited by the specific illustrative embodiments, but only by the scope of the appended claims.
~ , , ' .:
~ . ;
: .
Claims (12)
1. An EMI shielded electrical connector for terminating EMI shielded wires, said connector comprising: a plug housing constructed of a dielectric material having an outer end, a midportion and an inner end, said housing including a plug inner surface and a plug exterior surface;
an electrically conductive plug sleeve located adjacent said inner surface having a forward section extending from proximate said outer end to a plug joint section proximate said midportion;
a receptacle shell constructed of dielectric material adapted for engagement with said plug housing having an outer end portion and an inner end portion with a shell inner surface and shell outer surface; and, an electrically conductive shell sleeve located adjacent said shell inner surface having an outer part extending from proximate said outer end portion to a shell joint part, said shell joint part and said plug joint section forming a joint connection at a location proximate said plug housing midportion when said plug housing and receptacle shell are engaged.
an electrically conductive plug sleeve located adjacent said inner surface having a forward section extending from proximate said outer end to a plug joint section proximate said midportion;
a receptacle shell constructed of dielectric material adapted for engagement with said plug housing having an outer end portion and an inner end portion with a shell inner surface and shell outer surface; and, an electrically conductive shell sleeve located adjacent said shell inner surface having an outer part extending from proximate said outer end portion to a shell joint part, said shell joint part and said plug joint section forming a joint connection at a location proximate said plug housing midportion when said plug housing and receptacle shell are engaged.
2. The connector of claim 1 including a junction means forming an electrically conductive interface between said plug joint section and said shell joint part.
3. The connector of claim 2 wherein said plug joint section and said shell joint part form an overlapping joint with said junction means.
4. The connector of claim 3 wherein said junction means comprises a metallic ring member.
5. The connector of claim 1 wherein said plug housing inner surface includes an annular recess proximate said inner end, said recess containing a sealing member for engagement with said shell joint part.
6. The connector of claim 1 further including a plug ground plane in electrical communication with said plug sleeve and a shell ground plane in electrical communication with said shell sleeve.
7. The connector of claim 1 wherein said receptacle shell is provided with a grounding panel engagement means for mounting said receptacle shell to a grounded external support structure, said grounding panel engagement means being electrically coupled to said shell sleeve.
8. The connector of claim 7 wherein said engagement means comprises a jam-nut connector interconnecting said shell sleeve and said support structure.
9. An electrical connector comprising a plastic receptacle shell releasably engaged with a plastic plug housing, said housing having an outer end, a midportion and an inner end, said receptacle shell having an outer end portion and an inner end portion, said housing and shell each enclosing an insert containing means for terminating one or more cables, said shell having an inner metallic shell sleeve that includes a shell joint part, said housing having an inner metallic plug sleeve with a plug joint section located proximate said midportion, said sleeves being engaged at a joint connection proximate said midportion.
10. The connector of claim 9 wherein said joint connection includes a junction means forming an electrical interface between said sleeves.
11. The connector of claim 9 wherein said cables include an outer metallic sheath and each of said inserts are provided with a grounding plate for interconnecting said sheath with a respective metallic sleeve.
12. The connector of claim 9 wherein said receptacle shell includes a grounding engagement means for coupling said metallic shell sleeve to an external support structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US257,650 | 1981-04-27 | ||
| US25765088A | 1988-10-14 | 1988-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1320996C true CA1320996C (en) | 1993-08-03 |
Family
ID=22977168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000615454A Expired - Fee Related CA1320996C (en) | 1988-10-14 | 1989-09-29 | Environmentally protected emi shielded connector |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0363823A3 (en) |
| JP (1) | JPH02265182A (en) |
| KR (1) | KR900007140A (en) |
| AU (1) | AU617879B2 (en) |
| CA (1) | CA1320996C (en) |
| IL (1) | IL91937A0 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9010199U1 (en) * | 1990-07-05 | 1990-09-06 | Schaltbau GmbH, 81677 München | Plug for a slide-in connector set |
| JP2570350Y2 (en) * | 1991-09-13 | 1998-05-06 | 矢崎総業株式会社 | Shield connector |
| CH702687B1 (en) * | 2008-03-25 | 2011-08-31 | Rego Fix Ag | Pressing device. |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1285598A (en) * | 1969-11-13 | 1972-08-16 | British Insulated Callenders | Improvements in electric cables |
| GB1348806A (en) * | 1971-05-20 | 1974-03-27 | C S Antennas Ltd | Coaxial connectors |
| DE2725653A1 (en) * | 1977-06-06 | 1978-12-14 | Grote & Hartmann | Coaxial cable plug and socket connector - has insulation discs to locate connector components and withstand axial forces |
| US4330166A (en) * | 1979-08-16 | 1982-05-18 | Automation Industries, Inc. | Electrical connector substantially shielded against EMP and EMI energy |
| US4457574A (en) * | 1982-02-05 | 1984-07-03 | Automation Industries, Inc. | Electromagnetically shielded connector |
| US4529257A (en) * | 1983-02-22 | 1985-07-16 | International-Telephone & Telegraph Corp. | Combined electrical shield and environmental seal for electrical connector |
| US4674807A (en) * | 1986-03-03 | 1987-06-23 | Harvey Hubbell Incorporated | Shielded connector |
-
1989
- 1989-09-29 CA CA000615454A patent/CA1320996C/en not_active Expired - Fee Related
- 1989-10-05 EP EP19890118506 patent/EP0363823A3/en not_active Withdrawn
- 1989-10-11 IL IL91937A patent/IL91937A0/en unknown
- 1989-10-12 AU AU42852/89A patent/AU617879B2/en not_active Ceased
- 1989-10-14 KR KR1019890014771A patent/KR900007140A/en not_active Ceased
- 1989-10-16 JP JP1268861A patent/JPH02265182A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0363823A2 (en) | 1990-04-18 |
| KR900007140A (en) | 1990-05-09 |
| AU4285289A (en) | 1990-04-26 |
| IL91937A0 (en) | 1990-06-10 |
| JPH02265182A (en) | 1990-10-29 |
| EP0363823A3 (en) | 1990-10-31 |
| AU617879B2 (en) | 1991-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKLA | Lapsed |
Effective date: 19970804 |