EP2166553A1 - Commutateur électrique - Google Patents

Commutateur électrique Download PDF

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Publication number
EP2166553A1
EP2166553A1 EP08016331A EP08016331A EP2166553A1 EP 2166553 A1 EP2166553 A1 EP 2166553A1 EP 08016331 A EP08016331 A EP 08016331A EP 08016331 A EP08016331 A EP 08016331A EP 2166553 A1 EP2166553 A1 EP 2166553A1
Authority
EP
European Patent Office
Prior art keywords
housing part
switch according
sealing
circuit board
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.)
Withdrawn
Application number
EP08016331A
Other languages
German (de)
English (en)
Inventor
Peter Leng
Oliver Schmidt
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP08016331A priority Critical patent/EP2166553A1/fr
Publication of EP2166553A1 publication Critical patent/EP2166553A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/86—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the casing, e.g. sealed casings or casings reducible in size
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/002—Casings sealed

Definitions

  • the invention relates to an electrical switch with a housing upper part and a housing lower part comprising housing and with a flexible switching mat with arranged in each a dome-like region movable contact elements, which are acted upon by at least one upper part mounted on the housing actuator and arranged on one under the switching mat PCB interact existing stationary contact elements, wherein the switching mat rests with its underside surface on the printed circuit board held on the lower housing part and in its edge region has a circumferential sealing zone.
  • Such a switch is from the DE 199 61 728 C1 known.
  • the sealing zone which serves to seal the housing, has a molded on the outer edge of the flexible switching mat, in cross-section mushroom-shaped sealing extension.
  • the sealing extension is taken in fixing the upper housing part on the lower housing part under application of pressing forces between a molded onto the upper housing part first sealing ridge and integrally formed on the lower housing part further sealing ridge.
  • the two sealing webs are circumferential to the outer wall formed on the outer wall or the outer wall of the housing lower part and have at their mutually facing end face in each case a cross-sectionally V-shaped sealing contour.
  • the sealing extension is thus fixed in a form-fitting manner between the sealing contour of a sealing web and the sealing contour of the other sealing web under interference fit.
  • a disadvantage are the relatively high demands to be considered in the prior art switch, which must be made to the manufacturing tolerances of the two housing parts and cause a significant cost.
  • Another disadvantage is the need for relatively high pressing forces, which are required to achieve
  • the invention is based on the object in an electrical switch of the type mentioned to eliminate the disadvantages mentioned in connection with the prior art switch as far as possible.
  • the sealing zone is designed as a sealing lip which sealingly cooperates with an axially extending, in the upper housing part cross wall of the housing base or fixing the upper housing part on the lower housing part under application of pressing forces between the end face of the wall and a radially inwardly extending, at least partially circumferential surface of the housing upper part is fixed by clamping.
  • the sealing lip on the end face of the wall sealingly and has at its edge an annular sealing surface which cooperates with the inner surface of the upper housing part
  • the sealing zone has a downwardly directed axial sealing collar, which at least partially surrounds the edge region of the printed circuit board.
  • the height of the wall is slightly larger than the distance of the circuit board from the bottom of the housing lower part.
  • the housing base serves as a reference surface for the positioning of the circuit board.
  • the lower housing part is supported with its outer edge region on the end face of the upper housing part when fixing the upper housing part to the lower housing part.
  • the upper housing part is provided with a plurality of sealing webs, which bear sealingly under the exertion of pressing forces on the switching mat.
  • At least one opening is provided in the switching mat, which is the removal of Fluids without capillary action is used.
  • a tubular extension which extends through an opening in the circuit board and a bore in the lower housing part and the surface sealingly bears against the printed circuit board and the lower housing part. Due to the optimal effect of this drainage measure, the reliability of the switch is increased.
  • the upper housing part and the lower housing part are firmly connected to each other by means of a positive connection.
  • the positive connection is expediently designed as a latching connection.
  • the electrical switch has a fixed electrical contact elements and movable electrical contact elements receiving and preferably made of plastic housing 1, in which at least one not shown actuating element is adjustably mounted, which is to adjust the loading of the movable contact elements starting from a neutral position in at least one functional position ,
  • the housing 1 essentially comprises an upper housing part 2 and a lower housing part 3. At the lower housing part 3, an electrical circuit board 4 is fixed in place.
  • the lower housing part 3 preferably serves as a reference surface for the positioning of the printed circuit board 4 in the housing 1.
  • the movable electrical contact elements are each arranged in a dome-like region 5 of a flexibly designed switching mat 6, which bears against the surface of the printed circuit board 4.
  • the associated, also not shown stationary contact elements are provided at designated locations of the circuit board 4.
  • the switching mat 6 has in its outer edge region on a sealing zone 7, which in the in Fig. 1 shown embodiment is designed as a cross-sectionally triangular-shaped sealing lip 8.
  • the sealing lip 8 cooperates with a projecting into the interior of the upper housing part 2 in wall 9 of the lower housing part 3, which serves to connect the lower housing part 3 with the upper housing part 2. Sonach the sealing forces act laterally.
  • the mentioned connection of the two housing parts 2, 3 is designed as a latching connection, the latching projections 11 are integrally formed on the outside of the wall 9 and engage in corresponding recesses 12 in the upper housing part 2.
  • the lower housing part 3 abuts with its edge region 22 on the end face of the upper housing part 2.
  • the switching mat 6 When fixing the upper housing part 2 on the lower housing part 3, the switching mat 6 is pressed by applying pressing forces on the upper side of the printed circuit board 4.
  • the sealing zone 7 or the sealing lip 8 seals against the inner surface of the wall 9.
  • Adjoining the sealing lip 8 is a downwardly extending sealing collar 10, which serves to seal the edge region of the printed circuit board 4.
  • narrow sealing webs 13, 14 are formed on the underside of the upper housing part 2.
  • an opening 16 in the flexible Switching mat 6 is provided, to which a tubular extension 17 connects.
  • the extension 17 extends through a further, formed in the circuit board 4 opening 18 and a formed in a molded on the housing part 3 projection 19 cylindrical bore 20 therethrough and forms an open to the atmosphere drainage channel 21st
  • the switching mat 6 has a collar 25 running perpendicular to its surface, at the upper edge of which a sealing lip 7 forming a flat sealing lip 28 connects.
  • the outer surface of the collar 25 abuts radially against the inner surface of the wall 9.
  • the arrangement of the sealing lip 28 is realized such that the sealing lip 28 in the determination of the upper housing part 2 on the lower housing part 3 between the end face of the wall 9 and a radially inwardly extending, at least partially circumferential surface 29 of the upper housing part 2 is fixed by clamping.
  • the compression forces required for the sealing effect are determined by the design dimensions of the upper housing part 2 and the lower housing part 3, in particular by the position of the lower edge portion 22 of the lower housing part 3 and the position of the locking projections 11 relative to the lower boundary of the recesses 12 in the upper housing part 2.
  • Fig. 3 illustrated third embodiment of the switch largely corresponds to the in Fig. 2 shown second embodiment.
  • the sealing lip 29 is at its outer edge provided with a sealing surface 30 which bears against the inner surface of the upper housing part 2.
  • Fig. 3 denoted by the letter "a".
  • FIG. 4 Another embodiment of the positive connection between the upper housing part 2 and lower housing part 3 is finally in Fig. 4 shown.
  • the outer region of the wall 9 is supported on a reference edge 31 integrally formed on the upper housing part 2.
  • Fig. 4 denoted by the letter "b”.

Landscapes

  • Push-Button Switches (AREA)
EP08016331A 2008-09-17 2008-09-17 Commutateur électrique Withdrawn EP2166553A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08016331A EP2166553A1 (fr) 2008-09-17 2008-09-17 Commutateur électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08016331A EP2166553A1 (fr) 2008-09-17 2008-09-17 Commutateur électrique

Publications (1)

Publication Number Publication Date
EP2166553A1 true EP2166553A1 (fr) 2010-03-24

Family

ID=40343633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08016331A Withdrawn EP2166553A1 (fr) 2008-09-17 2008-09-17 Commutateur électrique

Country Status (1)

Country Link
EP (1) EP2166553A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3312126A1 (de) * 1983-04-02 1984-10-11 Ing. Gerhard Dekorsy GmbH, 7760 Radolfzell Taste fuer ein in tastrichtung bewegbares schaltelement
US5260532A (en) * 1991-11-01 1993-11-09 United Technologies Automotive, Inc. Sealed housing for a remote switching device
DE19817369A1 (de) * 1997-05-07 1998-11-12 Marquardt Gmbh Anordnung von Schaltern
EP1032004A2 (fr) * 1999-02-25 2000-08-30 Valeo Electronique Dispositif de commutation étanche
DE19961728C1 (de) 1999-12-21 2001-08-30 Kostal Leopold Gmbh & Co Kg Elektrischer Schalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3312126A1 (de) * 1983-04-02 1984-10-11 Ing. Gerhard Dekorsy GmbH, 7760 Radolfzell Taste fuer ein in tastrichtung bewegbares schaltelement
US5260532A (en) * 1991-11-01 1993-11-09 United Technologies Automotive, Inc. Sealed housing for a remote switching device
DE19817369A1 (de) * 1997-05-07 1998-11-12 Marquardt Gmbh Anordnung von Schaltern
EP1032004A2 (fr) * 1999-02-25 2000-08-30 Valeo Electronique Dispositif de commutation étanche
DE19961728C1 (de) 1999-12-21 2001-08-30 Kostal Leopold Gmbh & Co Kg Elektrischer Schalter

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