EP2242069A1 - Agencement de contact pour application à faible courant - Google Patents

Agencement de contact pour application à faible courant Download PDF

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Publication number
EP2242069A1
EP2242069A1 EP10004035A EP10004035A EP2242069A1 EP 2242069 A1 EP2242069 A1 EP 2242069A1 EP 10004035 A EP10004035 A EP 10004035A EP 10004035 A EP10004035 A EP 10004035A EP 2242069 A1 EP2242069 A1 EP 2242069A1
Authority
EP
European Patent Office
Prior art keywords
contact
arrangement according
piece
holder
moving
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Withdrawn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
EP10004035A
Other languages
German (de)
English (en)
Inventor
Thomas Freyermuth
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.)
Eaton Industries GmbH
Original Assignee
Eaton Industries GmbH
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 Eaton Industries GmbH filed Critical Eaton Industries GmbH
Publication of EP2242069A1 publication Critical patent/EP2242069A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/027—Composite material containing carbon particles or fibres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts

Definitions

  • the invention relates to a contact arrangement for low-current applications.
  • Contact pieces are known from the prior art, which can be produced from coal, graphite or graphite metal mixtures ( DE 844 197 B . DE 20 2005 015 319 U1 ), or in which the materials of the contact pairing are metallic and electrographite ( DD 242 767 B1 . GB 933 239 A ).
  • the invention relates to a contact arrangement comprising at least one fixed contact made of copper and a longitudinally movable contact with a contact bridge carrying the contact pieces.
  • the contacts of the longitudinally movable contact are made of silver graphite ( DE 1049472 AS).
  • graphite when graphite is used, this designation generally refers to one of the carbon materials used.
  • isostatically pressed graphite also known by the name iso-graphite
  • iso-graphite is preferably proposed for the contact pieces.
  • the contact arrangement is primarily a lift-off or bridge contact, comprising the at least one contact piece and a contact holder carrying the at least one contact piece.
  • contacts made of carbon material have an increased internal resistance (compared to metallic contacts), the proposed contact arrangements have technical and economic advantages in signal and auxiliary switch contacts with control currents of ⁇ 1 A and control voltages up to ⁇ 60 V.
  • control currents of ⁇ 1 A and control voltages up to ⁇ 60 V For example, carbon does not form oxides on its surface , and then only volatile CO 2 is produced .
  • a contact point may consist of a conventional AgNi contact.
  • the other contact point is provided with carbon material.
  • the AgNi contact may be corrugated and soldered, welded or riveted to the contact holder.
  • the contact of carbon material may consist of a round rod, a cuboid or a small plate, which is glued with graphite adhesive on the contact holder.
  • the second contact material may consist of 70% or more carbon material and a remainder of metal powder.
  • a composition is also called metal graphite or called metal-impregnated, for its preparation, mixtures of metal powders, in particular copper, tin or lead, with graphite, in particular natural graphite, pressed and then solidified by annealing or sintering.
  • the second contact material can also be made completely (100%) of carbon material.
  • At least one of the contact elements can be provided with a corrugation or grooves. Corrugations should also be present on the associated contact-making elements, preferably in such a way that the corrugations on the correspondingly assigned contact elements have an orientation rotated by 90 ° relative to one another.
  • the contact arrangement preferably has two fixed contacts, wherein the fixed contacts at least one contact piece of carbon material bridging the fixed contacts is assigned.
  • the or the contact piece (s) is / are attached to the contact bridge, with adhesive joints or mechanical brackets in question.
  • the material of the contact bridge may be metallic, ie conductive or insulating. Since at least one contact piece used is, which lies with its entire length on the contact bridge and bridges the fixed contacts in the closed state of the contact arrangement, the material of the contact bridge can also be an electrical insulator.
  • the at least one contact piece may be formed as a round rod or as a cuboidal plate.
  • the rods may be formed as a solid cylinder or as a half cylinder. In a half cylinder, the flat side of the half cylinder would be usable as an adhesive surface.
  • the at least one contact piece can be fastened to the contact bridge with at least one clip.
  • Contact pieces in particular those in the form of round rods, may be held in sockets on or in the contact bridge.
  • the contact holder and the at least one contact piece of the moving contact can be formed in one piece.
  • contact holder and contact piece form a unit that can be connected to each other for example by gluing.
  • it can proceed that the carbon material of contact holder and contact piece has a uniform composition.
  • the invention assumes that the moving contact is machined (milled out) from a single piece of material of uniform composition.
  • the contact holder and / or the at least one contact piece should have a contour in the form of a rectangle in a plane perpendicular to the actuating direction of the contact arrangement. It can be formed on the parallel to the distance of the fixed contacts extending longitudinal sides of the rectangle formations that serve as a target or attack points for guides, brackets and / or attachments.
  • the pin lies centrally on the contact holder or the contact piece and extends, projecting from the surface of the contact holder or the contact piece parallel to the actuating direction of the contact arrangement.
  • the figures each show views of moving contacts T.
  • the moving contacts comprise at least one of the stationary contacts FK (see Fig. 1 ) associated contact piece.
  • the stationary contacts may be below or above a moving contact.
  • the contacts KQ, KS made of carbon material are drawn with hatching. They are held by a contact holder H or can be glued by means of graphite adhesive.
  • the contact bridges (also the contact holders or the contact pieces) generally have the shape of a rectangular parallelepiped.
  • semicircular notches S may be formed as guide grooves, which also serve as attack points or surfaces for brackets and / or attachments in addition to the cylindrical pin FF.
  • a contact bridge (moving contact) is shown, which is completely - so the carrier form and the edge formation - made of carbon material.
  • the entire moving contact thus contact holder H and contact piece KQ, KS are formed by a single cuboid body of Kohlenstofverstoff in length of the moving contact.
  • the contact piece in the integrally formed moving contact can also - unlike in Fig. 1 be designed round (as a half or full cylinder): see.
  • Fig. 4
  • the Fig. 2A shows a contact bridge, in the full length (aligned parallel to the fixed contacts) applied a plate KQ made of carbon material, for example, is glued.
  • the contact holder H can also be formed of an insulating material in such an arrangement.
  • an arrangement is shown in the drawing, in which two round rods KS are present parallel to each other, which are taken for example by a contact holder or glued to the contact holder.
  • the round rods each bridge the fixed contacts and can be used as a solid cylinder or as a semi-cylinder KS (as in Fig. 2B ) be formed.
  • the flat side of the half-cylinder can be used as an adhesive surface for attachment to the contact holder.
  • FIGS. 3, 4 and 5 each show an arrangement in which the at least one contact piece has a greater length than the contact holder H.
  • the contact piece projects beyond the contact holder on both sides.
  • FIG. 3 A method of attachment by means of two mounting brackets B for a small plate KQ made of carbon material is shown.
  • FIG. 4 an embodiment of a contact bridge is presented, in which a round rod KS made of carbon material is attached to the contact bridge with a contact holder H made of plastic. This completely eliminates adhesive bonds and associated contact resistance.
  • Fig. 5 is - comparable to Fig. 2 - A cuboidal plate KQ of carbon material accommodated in the contact bridge T, wherein the length of the plate KQ is greater than the length of the contact holder, so that the plate KQ the contact holder (also) surmounted on both sides. It is indicated by dashed lines that the plate can have different widths.
  • Such a contact holder made of plastic - after Fig. 5 - Can be made for example by molding the small plate KQ.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Contacts (AREA)
EP10004035A 2009-04-18 2010-04-16 Agencement de contact pour application à faible courant Withdrawn EP2242069A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009018035A DE102009018035A1 (de) 2009-04-18 2009-04-18 Kontaktanordnung für Schwachstromanwendungen

Publications (1)

Publication Number Publication Date
EP2242069A1 true EP2242069A1 (fr) 2010-10-20

Family

ID=42309528

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10004094.8A Not-in-force EP2242070B1 (fr) 2009-04-18 2010-04-16 Agencement de contact pour application à faible courant
EP10004035A Withdrawn EP2242069A1 (fr) 2009-04-18 2010-04-16 Agencement de contact pour application à faible courant

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP10004094.8A Not-in-force EP2242070B1 (fr) 2009-04-18 2010-04-16 Agencement de contact pour application à faible courant

Country Status (3)

Country Link
US (1) US8344276B2 (fr)
EP (2) EP2242070B1 (fr)
DE (1) DE102009018035A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1785618A (en) * 1920-04-09 1930-12-16 Gen Railway Signal Co Copper-carbon contact
DE844197C (de) 1941-07-18 1952-07-17 Eugen Dr-Ing Duerrwaechter Verfahren zur Herstellung von Unterbrecherkontakten aus kuenstlichen Kohlekoerpern und Graphitmetallkoerpern
DE1049472B (fr) 1959-01-29
GB933239A (en) 1959-07-13 1963-08-08 Licentia Gmbh A drum controller for electric motors
DD242767B1 (de) 1985-11-25 1989-10-25 Ilmenau Tech Hochschule Verfahren zum verbinden von schaltkontakten mit kontaktfedermaterial
DE19503184C1 (de) * 1995-02-01 1996-05-02 Degussa Werkstoff für elektrische Kontakte aus Silber-Kohlenstoff
EP1538643A2 (fr) * 2003-12-01 2005-06-08 Fuji Xerox Co., Ltd. Elément électrique , dispositif électrique, et procédé de fabrication d'un élément électrique et d'un dispositif électrique.
DE202005015319U1 (de) 2005-09-28 2006-02-02 Schunk Kohlenstofftechnik Gmbh Schalter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519872A (en) * 1946-11-19 1950-08-22 Gen Electric Electrical contact composition or the like
US5705297A (en) * 1996-03-04 1998-01-06 Bell Communications Research, Inc. Electrical connection for a polymeric laminate battery structure
JP3947307B2 (ja) * 1997-06-30 2007-07-18 株式会社鷺宮製作所 大電流用のマイクロスイッチ
JP2004022411A (ja) * 2002-06-18 2004-01-22 Mitsumi Electric Co Ltd 接点機構
FR2877763B1 (fr) * 2004-11-08 2007-03-16 Schneider Electric Ind Sas Pastille de contact destinee a un contact electrique mobile de disjoncteur, contact electrique mobile possedant une telle pastille et disjoncteur comportant un tel contact
CN102686768B (zh) * 2009-12-11 2016-02-03 Kgt石墨科技有限公司 衬底支承体

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049472B (fr) 1959-01-29
US1785618A (en) * 1920-04-09 1930-12-16 Gen Railway Signal Co Copper-carbon contact
DE844197C (de) 1941-07-18 1952-07-17 Eugen Dr-Ing Duerrwaechter Verfahren zur Herstellung von Unterbrecherkontakten aus kuenstlichen Kohlekoerpern und Graphitmetallkoerpern
GB933239A (en) 1959-07-13 1963-08-08 Licentia Gmbh A drum controller for electric motors
DD242767B1 (de) 1985-11-25 1989-10-25 Ilmenau Tech Hochschule Verfahren zum verbinden von schaltkontakten mit kontaktfedermaterial
DE19503184C1 (de) * 1995-02-01 1996-05-02 Degussa Werkstoff für elektrische Kontakte aus Silber-Kohlenstoff
EP1538643A2 (fr) * 2003-12-01 2005-06-08 Fuji Xerox Co., Ltd. Elément électrique , dispositif électrique, et procédé de fabrication d'un élément électrique et d'un dispositif électrique.
DE202005015319U1 (de) 2005-09-28 2006-02-02 Schunk Kohlenstofftechnik Gmbh Schalter

Also Published As

Publication number Publication date
EP2242070A1 (fr) 2010-10-20
EP2242070B1 (fr) 2015-07-08
DE102009018035A1 (de) 2010-10-28
US8344276B2 (en) 2013-01-01
US20100294634A1 (en) 2010-11-25

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