EP1191644A1 - Contact céramique tubulaire pour connecteur filtré - Google Patents

Contact céramique tubulaire pour connecteur filtré Download PDF

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Publication number
EP1191644A1
EP1191644A1 EP01000472A EP01000472A EP1191644A1 EP 1191644 A1 EP1191644 A1 EP 1191644A1 EP 01000472 A EP01000472 A EP 01000472A EP 01000472 A EP01000472 A EP 01000472A EP 1191644 A1 EP1191644 A1 EP 1191644A1
Authority
EP
European Patent Office
Prior art keywords
filter
contact
sleeve
rear end
adapter element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01000472A
Other languages
German (de)
English (en)
Other versions
EP1191644B1 (fr
Inventor
Philippe Guedeau
Jean-Pierre Picard
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.)
FCI SA
Original Assignee
FCI SA
Framatome Connectors International SAS
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 FCI SA, Framatome Connectors International SAS filed Critical FCI SA
Publication of EP1191644A1 publication Critical patent/EP1191644A1/fr
Application granted granted Critical
Publication of EP1191644B1 publication Critical patent/EP1191644B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters
    • H01R13/7197—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters with filters integral with or fitted onto contacts, e.g. tubular filters

Definitions

  • An object of the present invention is a tubular ceramic contact for filter connectors. It can be applied more particularly in the field of connectors, whether male or female, having one or more contacts such that each of the contacts has its own electrical filter. Connectors of this kind are preferably used in electronic instruments sensitive to undesired signals such as parasitic RF signals.
  • the advantage of the invention is that it proposes a connector in which the filters of the contacts can be easily withdrawn and replaced.
  • a contact provided with a filter has an elongated conductive part having a coupling extremity at a first end and a reception extremity at the second end.
  • the coupling extremity is generally opposite the reception extremity.
  • the reception extremity can receive, for example, a wire or a cable strand.
  • the filter contact On an intermediate part, between the first end and the second end, the filter contact has a filter mounted around the contact.
  • the filter is brittle, and the filter contact thus obtained is brittle.
  • the contacts are generally mounted permanently in a connector to ensure that there are no stresses on each of the different portions of the filter contact.
  • a connector of this kind poses a problem, especially when one of the contacts has to be replaced, for example when one of its ends is defective or when one of the filters is damaged.
  • the replacement of a filter contact inside a connector of this kind is a lengthy business inasmuch as it is difficult to handle small-sized elements, especially when they are brittle.
  • the total replacement of such connectors is costly, given the intrinsic cost of each of the filter contacts.
  • Such a contact comprises especially a detachable, front coupling part, a rear reception part which is also detachable, and a central stem provided with a filter, the central stem alone being anchored in the casing of the connector. Since the two parts, namely the front and rear parts, are detachable, it is easy to replace them.
  • the rear reception part is connected with the central stem by means of a union nut.
  • the coupling front part may be mounted by means of keying means and elastic bolts. These means may be positioned on the outer rim of a casing containing the filtered central stem.
  • the filtered central stem is preferably mounted in such a way that it is held at a front end of the casing, on the front part side, and similarly at a rear end of this central stem, on the rear part side.
  • the filtered central stem is held, for example, by a wall of the casing. This wall is preferably obtained by moulding an epoxy resin around the filter contact. A mounting of this kind is clearly irreversible.
  • a device of this kind is described especially in the document FR-A-2 464 581.
  • the advantage of the device is that the contacts compatible with the filter contact portion are individually detachable and replaceable. Should one of these reception and/or coupling parts be faulty, it can easily be changed.
  • this type of connector poses a problem since it is still impossible to access the filtered central stem to make a replacement if necessary. Indeed, the filtered central stem may be damaged during the connection and disconnection with the non-filtered front and rear parts, because of mishandling or deteriorating connections. In this case, it is always necessary to make a total replacement of the portion of the connector comprising especially the filtered central stem. Now this portion of the connector is the most expensive part.
  • a filter connector comprising a filter contact, such that the filter of this contact is easily detachable.
  • the filter is mounted so as to be sliding on the contact.
  • this filter is held on the contact by means of a spring to that is compressed between a retention bushing, mounted so as to be supported on the filter, and an adapter element.
  • This adapter element is held by mechanical means on a rear end of the contact.
  • This adapter means is preferably used as the reception extremity of a cable.
  • This spring, along with the retention bushing and the adapter element, are mounted so as to be sliding around the contact.
  • the simple withdrawal of the adapter element mounted at the end of the contact releases the spring and thus eliminates the compression force applied to the retention bushing of the filter. Since the filter is itself in a sliding position, it can be easily dismounted from the contact. Indeed, the filter is itself held around the contact between a ring of this contact and the retention bushing.
  • An object of the invention of a filter connector comprising a contact, a filter around this contact, when the filter is held between a shoulder of the contact and a sliding sleeve on the contact, this sleeve being held by means of a spring compressed between this sleeve and an adapter element mounted at a rear end of the contact.
  • Figure 1a shows a filter contact 1 according to the invention.
  • the contact 1 is designed to be mounted in a casing of a connector.
  • the contact 1 has a shape such that it is preferably elongated along an axis of orientation 2.
  • the contact 1 has a general cylindrical shape along this axis 2.
  • the contact 1 has chiefly a front end 3, a rear end 4 and an intermediate end 5 around which a filter 6 is mounted.
  • the intermediate portion 5 also has a cylindrical shape.
  • the front end 3 corresponds to a male pin but it can also correspond to a female receptacle.
  • the front end 3 corresponds to a coupling zone designed to be coupled with a complementary contact positioned for example in a complementary connector of the filter connector.
  • this constriction 9 improves the retaining of the contact 1 in an insulator of the connector designed to receive the contact 1. But above all, and in general, this constriction 9 attenuates the mechanical stresses on the filter during the connection/disconnection of the connector.
  • the front end 3 may have, at the constriction 9, a threaded part that gets engaged in a complementary nut presented in a rear part 10 of the shoulder 8.
  • the front end 3, which is the coupling zone may be mounted and dismounted from the filtered intermediate portion 5.
  • the contact 1 is obtained by moulding and is formed in one piece.
  • the terminal end of the front end 3 is gold-plated so as to improve the electrical performances and the quality of the connection made at this coupling zone.
  • the intermediate portion 5 has a diameter of the order of the diameter of the constriction 9. It therefore has a diameter smaller than the diameter of the shoulder 8. Since the intermediate portion 5 is preferably cylindrical, the filter 6 for its part is then also cylindrical and corresponds to a sleeve.
  • the rear end 4 is given a profile such that it is an exact prolongation of the intermediate portion 5 so as to enable a sliding from this rear end 4 towards the intermediate portion 5. It therefore has a same diameter and a same cylindrical shape as this portion 5.
  • the filtering sleeve 6 acts as a filter, it is preferably inserted from the rear end 4.
  • the filtering sleeve 6 can slide along the rear end 4 until it comes around the intermediate portion 5.
  • An inner diameter of the filtering sleeve 6 is that it is slightly greater than the outer diameter of the intermediate portion 5.
  • the filter 6 is not directly in contact with the intermediate portion 5.
  • the filtering sleeve 6 is in contact solely with the shoulder 8.
  • This shoulder 8 itself is in direct contact with the intermediate portion 5.
  • the shoulder 8 in particular has a rim 11 on which a border 12 of the filter 6 is supported.
  • the filtering sleeve 6 is made of ceramic. It is then perfectly symmetrical and has a total homogeneity of structure.
  • the filtering sleeve 6 may be obtained by a winding, on several layers, of a double foil comprising a first insulating foil 11 and a second conductive foil, the second conductive foil alone being connected with the contact 1 and the first insulating foil being connected to a ground.
  • the filtering sleeve 6 is held by means of a second insulating sleeve 13.
  • This insulating sleeve 13 works together with a spring 14.
  • the spring 14 is compressed between an adapter element 15 and the insulating sleeve 13.
  • the adapter element 15 is mounted at the level of the real end 4.
  • the second insulating sleeve 13 is inserted around the intermediate part 5 by sliding from the rear end 4.
  • the insulating sleeve 13 has a length such that it enables the walls of this insulating sleeve 13 to be positioned between the intermediate contact portion 5 and the filter 6. This ensures the perfect alignment and centring of the intermediate portion 5 in the middle of the filtering sleeve 6.
  • This insulating sleeve 13 has a flange 16 through it is possible to present a retention means at the second border 17 of the filter 6. This second border 17 is opposite the border 12. Furthermore, this flange 16 offers a support surface 18 on which the spring 14 can rest.
  • the spring 14 is furthermore held at an edge 19 of the adapter element 15. The spring 14 is compressed so as to retain the filtering sleeve 6 between the shoulder 8 and the flange 16. This edge 19 is preferably presented at a hole opening out into a cavity 20 of the adapter element 15, the cavity 20 receiving the rear end 4.
  • the adapter element 15 may for example be a shaft mounted on the rear end 4. For example, this shaft 15 is crimped or soldered to this rear end 4. Should the shaft 15 be simply crimped to the rear end 4, then it is possible to dismantle this adapter element.
  • the adapter element 15 has a second shaft 21 with a second end opposite the shaft compatible with the rear end 4, for example to receive a cable.
  • the contact 1 sets up a connection between a cable inserted at the rear end into the shaft 21 and a contact of a complementary connector of the front end 3.
  • the contact 1 described here above is an electrical assembly provided with a capacitor filter. Indeed, the current passing through the path 22 is filtered by a capacitor 23 parallel-mounted on this path 22. A plate of this capacitor 23 is connected to a ground 24.
  • the contact 1 has a Pi ( ⁇ ) filter.
  • the contact 1 comprises ferrites 25.
  • the ferrites 25 preferably have a tubular shape and are mounted around the contact 1 at the intermediate portion 5 in such a way that they are positioned between this intermediate portion 5 and the filter 6.
  • the insulating sleeve 13 then has a different shape.
  • the insulating sleeve 13 is conductive.
  • the insulating sleeve 13 no longer has long walls along the intermediate portion 5 so as to centre the contact 1 in the middle of the filter 6.
  • the insulating sleeve 13 has a narrowed portion 26 behind the flange 16. This narrowed portion 26 has a small length and extends slightly along the intermediate portion 5 between the contact 1 and the filter 6. In fact, the centring of the intermediate portion 5 in the middle of the filter 6 is guaranteed by means of the ferrites 25.
  • this insulating sleeve 13, on the other side of the flange 26, may have a narrowed and split part 27 that sets up the electrical continuity and lies partly along the rear end 4 of the contact 1.
  • the holding of the insulating sleeve 13 along the axis 2 does not damage the structure of the contact 1. Indeed, given the length of the contact 1, the insulating sleeve 13 thus permits a slight mobility of the contact 1 within the filter 6.
  • the insulating sleeve 13 also cooperates with the spring 14 and the adapter element 15 mounted around the rear end 4 of the contact 1. This shaft is similarly crimped or else soldered.
  • a ferrite tube 25 has a length such that it is totally masked by the filter 6. Furthermore, the length of the narrowed portion 26 is designed in such a way that the ferrite 25 is positioned so as to be centred with respect to the filter 6, along the axis 2. Thus, the structure of the filter proposed in figure 2a is perfectly symmetrical.
  • FIG. 2b The schematic diagram of the filter proposed by this configuration is shown in figure 2b. It also comprises the path 22 connected to the first capacitor 23, a plate of this capacitor 23 being connected to the ground 24, and series-connected with a coil 28 corresponding to the ferrite 25.
  • This: coil is parallel-connected with a second node 29 with a second capacitor 30.
  • the ferrite 25 therefore plays the role of the coil 28.
  • the coil 28 is series-connected with the path 22 conveying the current received by the contact 1. It has an electromagnetic shielding role.
  • the structure thus described truly corresponds to a Pi ( ⁇ ) filter.
  • the capacitors 26 and 30 each correspond to two half-capacitors of equal value.
  • the Pi ( ⁇ ) filter is a quadrupole filter, namely an inductive-effect filter. Its main purpose is high-frequency filtering and it additionally provides a shielding against disturbances conducted by the contact 1.
  • a Pi ( ⁇ ) filter is useful especially when the disturbances generated in the coupling zone are great. Furthermore it has the effect of counterbalancing the inductive effect of the spring 14.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
EP20010000472 2000-09-21 2001-09-19 Contact céramique tubulaire pour connecteur filtré Expired - Lifetime EP1191644B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0012062 2000-09-21
FR0012062A FR2814287B1 (fr) 2000-09-21 2000-09-21 Contact ceramique tubulaire pour connecteur filtre

Publications (2)

Publication Number Publication Date
EP1191644A1 true EP1191644A1 (fr) 2002-03-27
EP1191644B1 EP1191644B1 (fr) 2003-05-07

Family

ID=8854553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010000472 Expired - Lifetime EP1191644B1 (fr) 2000-09-21 2001-09-19 Contact céramique tubulaire pour connecteur filtré

Country Status (3)

Country Link
EP (1) EP1191644B1 (fr)
DE (1) DE60100254T2 (fr)
FR (1) FR2814287B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB691191A (en) * 1950-04-26 1953-05-06 Communications Patents Ltd Improved electrical couplings of the coaxial type
US3181044A (en) * 1962-11-14 1965-04-27 William C W Duncan Capacitor mount
US4264116A (en) * 1979-08-31 1981-04-28 The Bendix Corporation Filter connector with adaptor for quick disconnection
EP0698948A1 (fr) * 1994-08-26 1996-02-28 Fred Schmitt Connecteur électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB691191A (en) * 1950-04-26 1953-05-06 Communications Patents Ltd Improved electrical couplings of the coaxial type
US3181044A (en) * 1962-11-14 1965-04-27 William C W Duncan Capacitor mount
US4264116A (en) * 1979-08-31 1981-04-28 The Bendix Corporation Filter connector with adaptor for quick disconnection
EP0698948A1 (fr) * 1994-08-26 1996-02-28 Fred Schmitt Connecteur électrique

Also Published As

Publication number Publication date
FR2814287B1 (fr) 2004-12-17
DE60100254T2 (de) 2004-04-08
DE60100254D1 (de) 2003-06-12
EP1191644B1 (fr) 2003-05-07
FR2814287A1 (fr) 2002-03-22

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