EP1170833A1 - Connecteur pour câble coaxial avec un conducteur extérieur ondulé en hélice - Google Patents

Connecteur pour câble coaxial avec un conducteur extérieur ondulé en hélice Download PDF

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Publication number
EP1170833A1
EP1170833A1 EP00114568A EP00114568A EP1170833A1 EP 1170833 A1 EP1170833 A1 EP 1170833A1 EP 00114568 A EP00114568 A EP 00114568A EP 00114568 A EP00114568 A EP 00114568A EP 1170833 A1 EP1170833 A1 EP 1170833A1
Authority
EP
European Patent Office
Prior art keywords
ferrule
connector
outer conductor
cable
bushing
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.)
Withdrawn
Application number
EP00114568A
Other languages
German (de)
English (en)
Inventor
Jimmy Ciesla Henningsen
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.)
Amphenol Cabelcon ApS
Original Assignee
Cabel Con AS
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 Cabel Con AS filed Critical Cabel Con AS
Priority to EP00114568A priority Critical patent/EP1170833A1/fr
Publication of EP1170833A1 publication Critical patent/EP1170833A1/fr
Withdrawn legal-status Critical Current

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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
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H01R24/56—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency specially adapted to a specific shape of cables, e.g. corrugated cables, twisted pair cables, cables with two screens or hollow cables
    • H01R24/564—Corrugated cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0521—Connection to outer conductor by action of a nut

Definitions

  • the present invention relates to connectors for coaxial cables and more particularly to connectors for coaxial cables having a helically corrugated outer conductor as set forth in the preamble of claim 1.
  • Coaxial cables with a corrugated outer conductor are frequently used for radio frequency applications, and the use of a corrugated outer conductor increases the flexibility of the cable compared to a corresponding cable with a smooth outer conductor.
  • the corrugation of the outer conductor is made helical, thus for instance allowing a coaxial cable connector to the attached to an end of the cable by screwing the connector or a part hereof onto the outer conductor.
  • U.S. Patent No. 5,766,037 discloses a connector of the above kind where the attachment of one end of the corrugated outer conductor of the cable to the connector is accomplished by means essentially comprising a clamping back nut one end of which is provided with a number of radially resilient fingers, a radially inward portion of which are provided with threads matching the helical corrugation of the outer conductor, so that when the connector is assembled and mounted on the cable, said threads exert an inwardly directed pressure on the outer conductor.
  • the sleeve is inserted in the connector so that said end portion of the outer conductor becomes located in the gab thereby formed between one longitudinal end face of the conductor and said longitudinal end face of the sleeve.
  • the connector is finally assembled by screwing an outer bushing over that end of the connector, which is receiving the cable, said width of said gab is being reduced, thus retaining said end portion of the outer conductor firmly within said gab.
  • a firm and reliable electrical and mechanical connection between the outer conductor and the connector is thus only being established within the relatively limited region of the gab.
  • said retainment of the end of the outer conductor in said gab also results in an irreversible deformation of the end of the outer conductor.
  • a common disadvantage with all of the connectors mentioned above is that the final connection between the outer conductor and the corresponding part of the connector is obtained in such a manner that it results in a deformation of a part of the end of the outer conductor, which deformation has the detrimental effect of rendering it either impossible or at least difficult to remove the connector from the cable, once it has been attached to the connector, and furthermore that if the connector is actually removed from the cable, said end part of the outer conductor will be more or less damaged, so that the end of the cable must be prepared again prior to a succeeding application of a connector thereto. This may be difficult or even impossible in many circumstances.
  • a connector for a coaxial cable with a helically corrugated outer conductor according to the invention, where a firm and reliable electrical and mechanical connection between the connector and the outer conductor of the coaxial cable is obtained by screwing a rear part of the connector unto said outer conductor.
  • the rear part essentially comprises a tubular outer bushing (which can be attached to the remaining part of the connector, in the following referred to as the main body of the connector, during the final assembling of the connector), a ferrule placed coaxially inside said outer bushing, so that it can be displaced longitudinally within said outer bushing over a certain distance relative hereto, said ferrule being radially resilient over a part of its longitudinal extension, and engagement means placed between said outer bushing and said ferrule, such that when said ferrule is longitudinally located within a first region within said outer bushing, relative rotational movement between said ferrule and said outer bushing is prevented, and such that when said ferrule is not located within said first region, said ferrule is free to rotate relative to said outer bushing.
  • a portion of the inner circumferential surface of said ferrule is provided with threads matching the helically corrugated outer conductor, thereby making it possible to screw said ferrule unto an end of the outer conductor.
  • Extending radially inward said ferrule is furthermore provided with an inner circumferential protrusion located at one longitudinal end of said threads proximal to said main body, at which end of the ferrule this is not radially resilient, said protrusion providing a contact surface between the end of the outer conductor and the ferrule, when the outer conductor is screwed as far as possible into said ferrule.
  • the rear part is first displaced longitudinally relative to the end of the cable, until the ferrule becomes located in said first region inside the outer bushing, whereby the ferrule is prevented from rotation relative to the outer bushing. In this position, it is then possible to screw the rear part unto the outer conductor due to the presence of said threads inside the ferrule.
  • the end of the outer conductor reaches said inwardly directed inner circumferential protrusion provided in the ferrule, a firm electrical contact is established between the end of the outer conductor and this protrusion without causing deformation of the end of the outer conductor. It is hereafter possible to displace the outer conductor/the ferrule longitudinally relative to the outer bushing so that the ferrule leaves said first region, whereby it becomes possible to rotate the outer bushing relative to the cable.
  • the rear part is attached to the main body of the connector by screwing the outer bushing unto one end of the main body in a manner known per se.
  • the outer bushing is on a part of the inner circumferential surface hereof provided with means engaging corresponding means provided on the outer circumferential surface of the ferrule, such that when during this attachment of the rear part to the main body, a relative longitudinal displacement between the rear part and the main body takes place, said engagement causes said radially resilient part of the ferrule to be compressed around the outer conductor of the cable, thereby providing increased electrical and mechanical attachment between the outer conductor and the ferrule (and hence electrical contact from the outer conductor via the rear part of the connector to the main body of the connector).
  • a certain longitudinal extension of the inner circumferential surface of the ferrule which is radially resilient is provided with retaining means, so that said radial compression of the ferrule causes said retaining means to press against the jacket of the cable and thereby further contribute to a reliable attachment of the connector to the cable.
  • the connector comprises essentially two parts, the first of which is the main body 2 containing the centre terminal 1 of the connector, which centre terminal is to be electrically connected to the inner conductor 15 of the coaxial cable.
  • This connection is effected by means of an inner and outer compression means 8, 9 in a manner known per se, and which will therefore not be described further in this case.
  • the second main part of the connector is the tubular rear part of the connector comprising the outer bushing 12 of the connector.
  • the tubular main body 2 and the outer bushing 12 can be attached coaxially to each other and displaced in the longitudinal direction relative to each other by screwing the outer bushing 12 unto the main body 2 by means of threads 26 provided on a part of the outer circumferential surface of the main body 2 and corresponding threads 27 provided on a part of the inner circumferential surface of the outer bushing 12.
  • a tubular ferrule 11 Positioned coaxially within said outer bushing 12 and longitudinally slidable relative thereto, there is provided a tubular ferrule 11, which ferrule 11 over a certain longitudinal extension hereof is provided with a number of slits 21 (see figure 2 and 4) cut through the circumferential wall of the ferrule11. These slits 21 provide the ferrule 11 with radial resiliency over the major longitudinal extension of the ferrule 11. Furthermore, the inner circumferential surface of said ferrule 11 is over a certain longitudinal extension hereof provided with threads 22 corresponding to the thread provided by the helically corrugated outer conductor 16 of the coaxial cable. On the remainder of that part of the ferrule 11, which is provided with said slits 21, there is provided a number of inner circumferential protrusions 19 acting as retaining means for the jacket 17 of the coaxial cable.
  • FIG. 2 shows a side elevation view of the ferrule 11 used in this embodiment of the present invention.
  • the major part of the longitudinal extension of the ferrule 11 is provided with a number of slits 21 through the circumferential wall of the ferrule.
  • the ferrule 11 is provided with a conical collar 18 on the outer circumferential surface hereof and at the distal end of the ferrule 11 relative to the coaxial cable, the ferrule 11 is provided with a circumferential end collar 30, thus forming a first longitudinal portion 28 of the ferrule 11 between said conical collar 18 and said end collar 30 for receiving the tubular engagement means 10 to be described in the following.
  • the end face of the ferrule 11 furthest away from the end collar 30 is provided with a conical end portion 25.
  • tubular engagement means 10 coaxially surrounding said first longitudinal portion 28 is described.
  • the outer circumferential surface of the tubular engagement means 10 is made rugged, for instance by knurling or other suitable processes, with the object to provide increased friction between this surface and the corresponding part of the inner circumferential surface of the outer bushing 12 in order to maintain the engagement means 10 in its longitudinal position within the outer bushing 12.
  • the engagement means 10 is provided with longitudinally extending ribs 20, a number of which (in the present case 6, although other numbers of ribs can of cause also be used) are shown with reference to figure 5, which ribs 20, when the ferrule 11 is located within said first region relative to the outer bushing 12, are brought into engagement with that part of the slits 21 which are penetrating the conical collar 18, so that when the ferrule 11 is located within said first region relative to the outer bushing 12, a rotational movement of the ferrule 11 relative to the outer bushing 12 is prevented due to the engagement of the ribs 20 with the conical collar 18.
  • the ribs 20 are not in engagement with the conical collar 18, the ferrule 11 can freely rotate relative to the outer bushing 12.
  • the coaxial cable is suitably prepared so that the relative dimensions of the exposed parts of the inner conductor 15 and the corrugated outer conductor 16 as schematically indicated in figure 1 are obtained.
  • the length of exposed corrugated outer conductor, and hence the number of turns of the "thread" provided by the helical corrugation should correspond to the longitudinal dimension of that part of the inner circumferential surface of the ferrule 11, which shall receive said exposed part of the outer conductor 16.
  • the prepared cable is then inserted into the one end of the bushing 12 as indicated by the arrow A in figure 1 and displaced longitudinally inside the bushing 12 as far as possible, during which displacement the ferrule 11 slides within the engagement means 10 until a point, where said ribs 20 reach the end of the conical collar 18 facing the first portion 28 of the ferrule.
  • the above described engagement of the ribs 20 with the slits 21 through the conical collar 18 can now be effected by rotating the outer bushing 12 relative to the cable, until an audible click or tactile vibration is perceived, indicating that said engagement has been obtained.
  • the rear part is screwed unto the outer conductor 16 of the cable, until the end of the outer conductor 16 reaches a radially inner circumferential protrusion 31 of the ferrule 11 at point C in the figure.
  • a firm and reliable electrical contact between the inner circumferential protrusion 31 of the ferrule (and hence with the outer bushing and eventually with the main body of the connector) and the end face of the outer conductor 16 facing said inner circumferential protrusion 31 is finally obtained without any deformation being caused to the end of the outer conductor 16.
  • the outer bushing 12 is longitudinally displaced in a direction away from the cable, the ferrule 11 is brought out of engagement with the ribs 20 (i.e. out of said first region), whereafter it is possible to rotate the outer bushing freely relative to the cable, thus facilitating the final attachment between the rear part of the connector and the main body 2 hereof.
  • the main body 2 is screwed into the outer bushing 12 with the dual effect that the contact between the centre terminal 1 and the inner conductor 15 is obtained, and simultaneously that as the end face of the ferrule 11 facing away from the coaxial cable reaches the outer compression means 9, and the bushing 12 is still being advanced over the main body 2 in the direction of the arrow A, the conical part 23 on the inner circumferential surface of the outer bushing 12 slides over the inclined portion of the conical collar 18 on the outer circumferential surface of the ferrule 11, thus causing a radially inwardly directed compression of the ferrule 11, said compression being made possible by the presence of the longitudinal slits 21 in the ferrule 11.
  • said radially protruding inwardly directed conical part of the inner bushing 13 is sliding longitudinally over said conical end portion 25 of the ferrule 11and thereby presses said inner circumferential protrusions 19 on the ferrule 11 firmly against the jacket 17 of the coaxial cable.
  • the connector is now correctly mounted on the cable. In this final position of the rear part relative to the main body, the ribs 20 on the engagement means 10 are not in engagement with the slits 21 passing through the conical collar 18, so that even in this final stage, the connector can still be rotated relative to the cable.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
EP00114568A 2000-07-07 2000-07-07 Connecteur pour câble coaxial avec un conducteur extérieur ondulé en hélice Withdrawn EP1170833A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00114568A EP1170833A1 (fr) 2000-07-07 2000-07-07 Connecteur pour câble coaxial avec un conducteur extérieur ondulé en hélice

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00114568A EP1170833A1 (fr) 2000-07-07 2000-07-07 Connecteur pour câble coaxial avec un conducteur extérieur ondulé en hélice

Publications (1)

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EP1170833A1 true EP1170833A1 (fr) 2002-01-09

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EP00114568A Withdrawn EP1170833A1 (fr) 2000-07-07 2000-07-07 Connecteur pour câble coaxial avec un conducteur extérieur ondulé en hélice

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EP (1) EP1170833A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2122786A1 (fr) * 2007-02-22 2009-11-25 John MezzaLingua Associates, Inc. Connecteur à compression compact pour câble coaxial ondulé annulaire
US7690945B2 (en) 2007-11-21 2010-04-06 Corning Gilbert Inc. Coaxial cable connector for corrugated cable
CN102005653A (zh) * 2010-11-24 2011-04-06 江苏捷士通科技股份有限公司 一种射频天馈系统用射频同轴连接器
US8047870B2 (en) 2009-01-09 2011-11-01 Corning Gilbert Inc. Coaxial connector for corrugated cable
US8113878B2 (en) 2009-04-24 2012-02-14 Corning Gilbert Inc. Coaxial connector for corrugated cable with corrugated sealing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422549A1 (de) * 1984-06-18 1985-12-19 Georg Dr.-Ing. 8152 Feldkirchen-Westerham Spinner Stecker fuer koaxialkabel
US5944556A (en) * 1997-04-07 1999-08-31 Andrew Corporation Connector for coaxial cable
EP0975051A1 (fr) * 1998-07-24 2000-01-26 Cabel-Con A/S Connecteur pour câble coaxial ayant un filetage à pas multiples
US6080015A (en) * 1997-05-21 2000-06-27 See Sprl Method for connecting coaxial cables and connector for that purpose

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422549A1 (de) * 1984-06-18 1985-12-19 Georg Dr.-Ing. 8152 Feldkirchen-Westerham Spinner Stecker fuer koaxialkabel
US5944556A (en) * 1997-04-07 1999-08-31 Andrew Corporation Connector for coaxial cable
US6080015A (en) * 1997-05-21 2000-06-27 See Sprl Method for connecting coaxial cables and connector for that purpose
EP0975051A1 (fr) * 1998-07-24 2000-01-26 Cabel-Con A/S Connecteur pour câble coaxial ayant un filetage à pas multiples

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2122786A1 (fr) * 2007-02-22 2009-11-25 John MezzaLingua Associates, Inc. Connecteur à compression compact pour câble coaxial ondulé annulaire
CN101622762A (zh) * 2007-02-22 2010-01-06 约翰·梅扎林瓜联合有限公司 用于环形波纹同轴电缆的紧凑压缩连接件
EP2122786A4 (fr) * 2007-02-22 2010-12-22 Mezzalingua John Ass Connecteur à compression compact pour câble coaxial ondulé annulaire
US7690945B2 (en) 2007-11-21 2010-04-06 Corning Gilbert Inc. Coaxial cable connector for corrugated cable
US8047870B2 (en) 2009-01-09 2011-11-01 Corning Gilbert Inc. Coaxial connector for corrugated cable
US8113878B2 (en) 2009-04-24 2012-02-14 Corning Gilbert Inc. Coaxial connector for corrugated cable with corrugated sealing
CN102005653A (zh) * 2010-11-24 2011-04-06 江苏捷士通科技股份有限公司 一种射频天馈系统用射频同轴连接器

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