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CA1181504A - Cover arrangement with shielding and strain relief means - Google Patents

Cover arrangement with shielding and strain relief means

Info

Publication number
CA1181504A
CA1181504A CA000416504A CA416504A CA1181504A CA 1181504 A CA1181504 A CA 1181504A CA 000416504 A CA000416504 A CA 000416504A CA 416504 A CA416504 A CA 416504A CA 1181504 A CA1181504 A CA 1181504A
Authority
CA
Canada
Prior art keywords
arrangement
cable
connector
side wall
insert
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
Application number
CA000416504A
Other languages
French (fr)
Inventor
Robert G. Dickie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northern Technologies Ltd
Original Assignee
Northern Technologies Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Northern Technologies Ltd filed Critical Northern Technologies Ltd
Priority to CA000416504A priority Critical patent/CA1181504A/en
Priority to JP22196083A priority patent/JPS59146174A/en
Priority to DE19833342996 priority patent/DE3342996C2/en
Application granted granted Critical
Publication of CA1181504A publication Critical patent/CA1181504A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46Bases; Cases
    • H01R13/516Means for holding or embracing insulating body, e.g. casing, hoods
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46Bases; Cases
    • H01R13/502Bases; Cases composed of different pieces
    • H01R13/512Bases; Cases composed of different pieces assembled by screw or screws
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591Specific features or arrangements of connection of shield to conductive members
    • H01R13/6592Specific 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)

Abstract

ABSTRACT OF THE DISCLOSURE

The invention relates to a novel cover arrange-ment for a connector at the end of a cable connected to the connector with an electrical shielding and strain relief means provided in the cover arrangement, In accordance with the invention electrical shielding and the size of the strain relief means is made adjustable by the use of inserts so that the cover arrangement is adapted to hold and provide strain relief for a variable number of cable sizes while maintaining shielding inte-grity, Strain relief means also includes means for gripping the cable.

Description

The invention relates to a novel cover arrange-ment fo~ a connector at the end of a cable connected to the connector. More specifically, the invention relates to such an arrangement which provides a novel strain relief means, and which may also provide electrical shielding, In modern electronics systems, the connection between one black box and another typically requires a large number of wires. To facilitate such connections, each box is outfitted with one or more single connector terminals having a large number of connection points.
The wires for connecting the black boxes are bound in a cable and each cable end is terminated in a connector such as, for example, a sub-miniature D Type 25 pin con-nector, by connecting the wires of the cable to their respective pins of the connectors.
New legislation in the United States from the federal communications commission concerning electro-magnetic emissions (EMI) and radio frequency emissions (RFI) of electronic products and their accessories necessitates electrical shielding via highly conductive materials and cabinetry cabling and other accessories potentially able to radiate EMI or RFI.
The cable ends and their respective connectors must then be covered for esthetic reasons, for electrical shielding against EMI or RFI and for the protection against the environment, i.e,, grasping when connecting or disconnecting the connector. As the connections between the wires of the cable ends and ~he respective connectors are relatively fragile, if someone attempts to disconnect the cable from the black box by yanking on the cable instead of pulling on the cover arrangement there is a possibility that some of the wires will be disconnected from their respective pins, To protect against this, the cover arrangement must include a strain relief means. With such a strain relief means, when the wire is yanked, the force of the yank would be transmitted to the strain relief means and then to the cover arrangement rather than to the connected ends of the wires, Accordingly the strain relief means must be disposed between the connector and the cabl~
extruding outwardly of the connect cover arrangement. The cover arrangements are typically boxed like arrangements with an opening ~or holding the connector in one wall thereof and an opening for which the cable can pass in another wall thereof. m e box like arrangements are usu-ally made in two mating halves, In assembling the cover arrangement, the connector along with the connected cable is disposed in one half and the other half is then mounted on the first half the two meeting cover halves are held together by screws or other means. The shielding integrity must be maintained between the cover arrangement and the cable, In the cable there is a criss-cross arrangement of wires typically known as braid which surrounds all the inner wires, This braid totally enshrouds the inner wlres and thus providing electromagnetic radio frequency emissions protection, This braid must be electrically connected to the cover.
In existing cover arrangements the opening through which the cable passed was approximately 5% smaller than the diameter above the cables and braid. To provide strain relief when the two halves of the covers were closed there would be a slight compression of the cable and assuming that the t~o cover halves were a highly conductive metal or metal-like material the same clamping force that provided strain relief would be contacting the braid thus providing electrical continuity between the cover and the cable, The problem with this method is that for every different cable size one requires different size covers.
In the sub-miniature D 25 position connector series manufacturers typically supply five different cover groups to accommodate the various sizes of cables typically used, Another arrangement which is currently used employs small metal mechanical clip which is attached to the cable braid via two screws and then hooked into the interior of a connector cover, Although this method provides adequate strain relief the tightness and complete-ness of the electrical seal is not adequate for high frequency and high power EMI and RFI, Another disadvan-tage of this type of cover arrangement is that because of the increased amount of parts,labour to assemble the product is drastically increased, A further cover arrangement for a connector is described in Applicant's co-pending Canadian Application Ser, No, 395,745, filed February ,8, 1982 and Application Ser, No. 401,296, filed April 20, 1982, It is therefore an object of the invention to provide a cover arrangement for a connector and the end of a cable connected to said connector which overcomes the above disadvantages, It is a further object of the invention to provide such an arrangement which is inexpensive to produce and assemble, It is a still further object of the invention to provide such an arrangement with a strain relief means which can accommodate different sized cable while providing good shielding integrity It is a still further object of the invention to provide such strain relief means within the arrange-ment wherein the arrangement comprises two half members ~he strain relief means comprising at least one compression insert for placement in the interior of one of the half members ~hich insert contacts and clamps the cable and allows the cable braid to make complete and positive contact with the half members when the arrangement is in its closed position.
In accordance with a specific embodiment of the invention there is provided a cover arrangement for a con-nector and the end of a cable connected to the connector and extending rearwardly from the connector through the cover arrangement and outwardly therefrom. The cover arrangement includes a first half member and a mating second half member forming together, when in a closed position, an enclosure having a hollow interior, a front side wall and at least one other side wall. A front open-ing in the front side wall is provided for holdingly receiving the connector so that the front face of the connector faces outwardly of the cover arrangement. A
second opening is provided in the other side wall. A
cylindrical passage communicates with the second opening and is formed in the interior OL the cover arrangement The cable is adapted to extend outwardly of the cover arrangement through the cylindrical passage. An insert member is adapted to be holdingly received in the cylindrical passage, The cable includes a shielded braid, the shielded braid being wrapped around the insert member whereby to provide electrical shielding for the arrangement.
The invention will be better understood by an examination of the following description together with the accompanying drawings in which:
FIGURE 1 is a top view of the cover arrangement, FIGURE 2 is a rear view of the cover arrangement, FIGURE 3 is an inside view of one half member of the cover arrangement' FIGURE 4 is a section through an assembled cover arrangement including a cable, an insert, and shielding braid, and FIGURES 5A to 5C illustrate different insert members.
Referring now to the drawings, the cover arrange-ment, illustrated generally at 1, includes a first half 2Q member 3 and a second half member 5. Figure 2 illustrates the arrangement in its closed position, wherein the arrangement is box-like in shape. The arrangement is maintained in its closed position by screws through screw holes 7. The two half members may be hingedly connected along one side edge or constitute two separate pieces.
Flanges 9 are provided for connecting the arrangement to, for example, a circuit board or an enclosure.
The assembled arrangement includes a front side wall 11 and a rear side wall 13. As seen in Figure 4, the front side wall includes an opening 12 wherein is disposed .~.

the connector so that the front face of the connector faces outwardly of the cover arrangement.
Extending outwardly from the rear side wall 13 is a cylindrical extension 15. As seen in Figure 4, the cable 27 extends outwardly from the cylindrical extension 15, The extension 15 is formed, in one half integral with the first half member and, in the other half, integral with the second half member, As seen in Figure 3, the cylindrical extension includes a semi-annular groove 17 and two gripping means 19. These are also shown in Figure 4.
Referring to Figures 5A to 5C, it can be seen that the inserts comprise cylindrical members 21 each of which has at least a collar portion 23, Some of the inserts also include sleeve portions 25, As can be seen, as the inside diameter of the insert decreases, the sleeve members become thicker. Alter-natively, as the internal diameter increases, the sleeve members become thinner, When the internal diameter in-creases to a large enough diameter, as in Figure 5A, then the sleeve member completely disappears.
As seen in Figure 4, the cable 27 includes a plurality of wires 29, the front ends of which are connected to the connector which is not shown in the drawings. The insert member 21 is disposed in the cylindrical extension 15 such that the collar 23 is disposed in the groo~e 17.
The size of the insert will, of course, depend on the size of the cable. That is, the smaller the diameter of the cable, the smaller the inner diameter of the insert, When the insert is of such a size as to include sleeves 25, then braided shielding 31 can be wrapped around the outer perlphery of the sleeves. This will provide necessary shielding for the arrangement.
The inner diameter of the insert is selected so as to be somewhat smaller than the outer diameter of the cable. Thus/ the insert will clamp the cable to provide strain relief at the outer end of the cylindrical extension.
The gripping rings will both grip the shielding and also provide an extra amount of clamping action of the insert on the cable.
If the insert is of the type illustrated in Figure 5A, i.e., including only a collar, then the shielding will be folded back over the collar.

5~

SUPPLEMENTARY DISCLOSURE
A further embodiment of the invention will be better understood by an examination of the following description together with the accompanying drawing in which:
FIGURE 6 illustrates a second embodiment of the invention.
Although the above description relates to an embodiment including a plurality of inserts, it is o~
course possible that the cable size will be known before-hand. In this case, only a single insert, corresponding to that cable size, need be provided. However, in accordance with the invention, this is a useful embodiment in that it still provides shielding when the insert includes both the collar portion 23 and the sleeve portion 25. As above-mentioned in this embodiment including only a single insert with a sleeve portion, the braided shielding 31 is wrapped around the outer periphery of the sleeve as illustrated in Figure 4.
Although in the above, Applicant has described an embodiment including a cylindrical extension 15, such a cylindrical extension is not a necessary part of the invention, Instead, the rear side wall 13 can be disposed flush with the opening 12 as illustrated in Figure 6. As can be seen in Figure 6, in the latter embodiment, the passage 18 once again communicates with the opening 12, In all other respects, the latter embodiment is identical to the embodiment illustrated in Figures 1 to 5 herewith. Specifically, it can be used with a plurality of inserts, or a single insert can be provided which includes both the collar and the sleeve and which permits wra~ping of the braid 31 around the sleeve.

8 - c 3~

.5~

Although particular embodiments have been des-cribed, this was for the purpose of illustrating, but not limiting, the invention. Various modifications, which will come readily to the mind of one skilled in the art, are within the scope of the invention as defined in the appended claims.

_ g _

Claims (14)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follow:-
1. A cover arrangement for a connector and the end of a cable connected to said connector and extending rear-wardly from said connector through said cover arrangement and outwardly therefrom, comprising:
a first half member and a mating second half member forming together, when in a closed position, an enclosure having a hollow interior, a front side wall and at least one other side wall;
a front opening in said front side wall for holdingly receiving said connector so that the front face of said connector faces outwardly of said cover arrange-ment, a second opening in said other side wall, a cylindrical passage communicating with said second opening and formed in the interior of said cover arrangement, said cable being adapted to extend outwardly of said cover arrangement through said cylindrical passage;
a plurality of different sized cylindrical inserts;
groove means in said cylindrical passage and adjacent the free end thereof and adapted to receive said inserts, whereby, when an insert is disposed in said groove means, and said arrangement is closed, said insert contacts said cable whereby to clamp said cable and provide strain relief.
2. An arrangement as defined in claim 1 wherein said cylindrical passage comprises one portion thereof formed with said first half member and the remaining portion thereof formed with said second half member.
3. An arrangement as defined in claim 2 wherein said other side wall comprises the rear side wall.
4. An arrangement as defined in claim 3 and including gripping rings disposed in the interior of said cylindrical extension and inwardly of said groove means.
5. An arrangement as defined in claim 4 wherein said cylindrical insert comprises a sleeve means extending from said collar means;
said sleeve means extending into said cylindrical extension beyond said collar means.
6, An arrangement as defined in claim 5 wherein said cable comprises a shielded braid;
said shielded braid being wrapped around said sleeve whereby to provide electrical shielding for said arrangement.
7. An arrangement as defined in claim 5 wherein a cylindrical extension overlies said cylindrical passage CLAIMS SUPPORTED BY THE SUPPLEMENTARY DISCLOSURE
8. A cover arrangement for a connector and the end of a cable connected to said connector and extending rear-wardly from said connector through said cover arrangement and outwardly therefrom, comprising:
a first half member and a mating second half member forming together, when in a closed position, an enclosure having a hollow interior, a front side wall and at least one other side wall;
a front opening in said front side wall for holdingly receiving said connector so that the front face of said connector faces outwardly of said cover arrange-ment;
a second opening in said other side wall;
a cylindrical passage communicating with said second opening and formed in the interior of said cover arrangement, said cable being adapted to extend outwardly of said cover arrangement through said cylindrical passage;
an insert member adapted to be holdingly received in said cylindrical passage;
wherein said cable comprises a shielded braid;
said shielded braid being wrapped around said insert member whereby to provide electrical shielding for said arrangement.
9. An arrangement as defined in claim 8 wherein said cylindrical passage comprises one portion thereof formed with said first half member and the remaining portion thereof formed with said second half member.
10. An arrangement as defined in claim 9 wherein said other side wall comprises the rear side wall.
11. An arrangement as defined in claim 10 and includ-ing gripping rings disposed in the interior of said cylindrical extension and inwardly of said groove means.
12. An arrangement as defined in claim 11 wherein said cylindrical insert comprises a sleeve means extending from said collar means;
said sleeve means extending into said cylindrical extension beyond said collar means,
13. A cover arrangement for a connector and the end of a cable having a shielded braid, said cable being connected to said connector and extending therefrom, comprising:
a first half member and a mating second half member forming together, when in a closed position, an enclosure having a front side wall and at least one other side wall;
a front opening in said front side wall for holdingly receiving said connector so that the front face of said connector faces outwardly of said cover arrangement;
a cylindrical passage facing outwardly from said other side wall through which said cable is adapted to extend outwardly of said cover arrangement;
said cylindrical passage comprising one portion thereof formed with said first half member and the remain-ing portion thereof formed with said second half member;
a cylindrical insert;

groove means in the interior of said cylindrical passage and adjacent the free end thereof and adapted to receive said insert;
said insert being disposed in said groove means, said insert contacting said cable when said arrangement is closed, whereby to clamp said cable and provide strain relief, and said shielded braid being wrapped around said insert to provide electrical shielding for said arrange-ment.
14. The cover arrangement recited in claim 13 wherein said insert is in compression between said cable and said groove and wherein said compression makes positive contact between said cable braid which is folded back over the outside of said insert and said half member, thus provid-ing positive electrical connection and strain relief.
CA000416504A 1982-11-26 1982-11-26 Cover arrangement with shielding and strain relief means Expired CA1181504A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA000416504A CA1181504A (en) 1982-11-26 1982-11-26 Cover arrangement with shielding and strain relief means
JP22196083A JPS59146174A (en) 1982-11-26 1983-11-25 Cover unit
DE19833342996 DE3342996C2 (en) 1982-11-26 1983-11-28 Cover device for an electrical connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000416504A CA1181504A (en) 1982-11-26 1982-11-26 Cover arrangement with shielding and strain relief means

Publications (1)

Publication Number Publication Date
CA1181504A true CA1181504A (en) 1985-01-22

Family

ID=4124032

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000416504A Expired CA1181504A (en) 1982-11-26 1982-11-26 Cover arrangement with shielding and strain relief means

Country Status (3)

Country Link
JP (1) JPS59146174A (en)
CA (1) CA1181504A (en)
DE (1) DE3342996C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842549A (en) * 1987-04-16 1989-06-27 Amp Incorporated Dual diameter cable strain relief

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712810A1 (en) * 1997-03-26 1998-10-01 Whitaker Corp Cable plug arrangement
JP2002343491A (en) * 2001-05-21 2002-11-29 Furukawa Electric Co Ltd:The Shield connector
DE102012000137B4 (en) * 2012-01-06 2013-08-22 Auto-Kabel Managementgesellschaft Mbh Electric cable, method for producing an electric cable, and welding device for producing an electric cable

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3999830A (en) * 1975-07-18 1976-12-28 Amp Incorporated High voltage connector with bifurcated metal shell
DE2613907C3 (en) * 1976-03-31 1980-06-26 Siemens Ag, 1000 Berlin Und 8000 Muenchen Arrangement for shielding a plug connection
US4108527A (en) * 1977-06-23 1978-08-22 Amp Incorporated Strain relief assembly
CA1117199A (en) * 1979-07-03 1982-01-26 Lawrence G. Novotny Electrical connector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842549A (en) * 1987-04-16 1989-06-27 Amp Incorporated Dual diameter cable strain relief

Also Published As

Publication number Publication date
JPS59146174A (en) 1984-08-21
DE3342996C2 (en) 1996-09-05
DE3342996A1 (en) 1984-06-20

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Legal Events

Date Code Title Description
MKEC Expiry (correction)
MKEX Expiry
MKEX Expiry

Effective date: 20021126