EP0780863A2 - Dispositif pour l'établissement d'une connexion électrique - Google Patents

Dispositif pour l'établissement d'une connexion électrique Download PDF

Info

Publication number
EP0780863A2
EP0780863A2 EP96120451A EP96120451A EP0780863A2 EP 0780863 A2 EP0780863 A2 EP 0780863A2 EP 96120451 A EP96120451 A EP 96120451A EP 96120451 A EP96120451 A EP 96120451A EP 0780863 A2 EP0780863 A2 EP 0780863A2
Authority
EP
European Patent Office
Prior art keywords
circuit board
pressure
domes
dome
contact
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
EP96120451A
Other languages
German (de)
English (en)
Other versions
EP0780863B1 (fr
EP0780863A3 (fr
Inventor
Werner Mayer
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.)
Harman Becker Automotive Systems GmbH
Original Assignee
Becker 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 Becker GmbH filed Critical Becker GmbH
Publication of EP0780863A2 publication Critical patent/EP0780863A2/fr
Publication of EP0780863A3 publication Critical patent/EP0780863A3/fr
Application granted granted Critical
Publication of EP0780863B1 publication Critical patent/EP0780863B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
    • H01H23/02—Details
    • H01H23/12—Movable parts; Contacts mounted thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2213/00—Venting
    • H01H2213/002—Venting with external pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00—Tactile feedback
    • H01H2215/004—Collapsible dome or bubble

Definitions

  • the present invention relates to a device for establishing an electrical connection between adjacent conductor locations of a circuit board with a contact mat made of a substantially flat part, one flat side of which is arranged on the circuit board, and of molded domes, protruding beyond the other flat side, of pressure domes. which are each provided on their non-projecting side with a contact surface facing the circuit board and are displaceable relative to the flat part of the contact mat against an elastic restoring force between a rest position and a contact position electrically connecting the adjacent conductor locations of the circuit board.
  • Devices of this type are increasingly being used for electrical switching operations, since these devices can be produced inexpensively and can be switched directly on the circuit board, so that external switching and connecting means are omitted. It is important with these devices that they have a high level of operational reliability and a long service life, especially if they are used in facilities in motor vehicles such as car radios.
  • the invention is therefore based on the object of developing the device of the type mentioned at the outset such that these disadvantages do not occur.
  • the functionality is to be improved by largely preventing contamination from being sucked into the contact area between the pressure dome and the circuit board.
  • This object is achieved in that the space between the contact surface of a pressure dome and the circuit board is connected via a ventilation channel to the side of the contact mat facing away from the circuit board.
  • the air displaced from the contact space escapes through the ventilation duct into the space between the contact mat and the actuating element, which is largely free of impurities, etc. because no chips or the like in the manufacture of the actuators. arise.
  • the pressure dome returns to its rest position, the air for the contact space is sucked in through the ventilation duct from this largely contamination-free space between the contact mat and the actuating element. In this way, clogging of the contact area with impurities is largely prevented and the functionality of the device is guaranteed for a long time.
  • the ventilation duct is preferably formed in the pressure dome, in particular in the form of a central recess which opens into the top of the pressure dome pointing away from the circuit board.
  • the ventilation duct can thus be designed with a large cross section and a large length. This large volume of the ventilation channel ensures that the ventilation actually takes place largely via the ventilation channel and that air is prevented from being sucked in from the area between the contact mat and the circuit board.
  • the pressure domes are provided on their upper side with a projecting spring element which serves to support an actuating device for the pressure dom.
  • these spring elements also prevent the device from rattling by hitting the actuating device on the pressure dome during actuation.
  • the spring elements are preferably formed on the pressure dome without an undercut. In this way, a one-piece production of the spring elements with the pressure dome and in particular the entire contact mat is made possible. The manufacturing costs of the device are kept low in this way.
  • the shaping of the spring elements also has the advantage that separate unfolding elements are eliminated.
  • the spring elements are designed as spring tabs, which form the mouth opening for the ventilation channel between them.
  • the pressure domes are provided on their upper side with a central elevation projecting above the upper side.
  • This increase can be formed in particular by a dome-shaped or wave-shaped or by a roof-like beveled design of the top of the pressure domes.
  • This configuration results in a non-flat contact surface between the pressure mandrel and the actuating element.
  • this has the advantage that the contact surface of the actuating element rolls on the associated contact surface of the pressure dome. This ensures that the force is always introduced into the pressure dome essentially centrally and shear forces are avoided, as they occur when the surface of the pressure dome is flat.
  • the rocker-type actuation device cannot slide along the pressure dome.
  • sliding elements are therefore interposed between the contact mat and the actuating element, which is technically complex and cost-intensive.
  • the initially flat contact pad between the actuating element and the pressure dome merges into a line-like contact pad when the known devices are actuated, the contact line running outside the center of the pressure dome. Strong shear forces therefore occur which can lead to the pressure dome tilting.
  • Actuation element be provided with an elevation which acts centrally on the top of the pressure dome. In this case, too, the force is introduced into the pressure dome centrally, so that the occurrence of shear forces is largely prevented.
  • the pressure domes are essentially oval in cross section, the longitudinal axis of the oval extending in the direction of the connecting line of the pressure domes of the pair .
  • This configuration of the pressure domes of such a pair prevents the pressure domes from tilting due to shear forces which can occur when the rocker-like element is actuated. This ensures proper actuation of the pressure dome, including the tactile feedback normally associated with it
  • Another advantage of this embodiment is that the force-displacement diagram usual with simple buttons is also observed with rocker-type actuators can be, even if the pivot point of the rocker is a large distance from the circuit board.
  • the pressure dome 1 shown in FIGS. 1 and 2 essentially has the shape of a cylinder with an oval base and is provided with a central recess 2.
  • two spring tabs 4 are formed, which essentially have a semi-dome-like shape and form an opening 5 between them, which is connected to the central recess 2 of the pressure dome 1.
  • an apron 6 is formed around it, which connects the pressure dome to the flat part 7 of the contact mat, which is not shown here.
  • the underside 8 of the pressure dome 1 is designed as a contact surface and is set back in relation to the underside 9 of the flat part 7 of the contact mat. In this way, the contact surface 8 is at a distance from the circuit board when the underside 9 of the contact mat is seated on a circuit board.
  • the apron 6 in the lower region of the pressure dome 1 is elastic and acts as a restoring element which holds the pressure dome 1 in its rest position, in which the contact surface 8 is at a distance from the circuit board, not shown here.
  • the restoring force is overcome, a tactile feedback to the user is usually generated.
  • the spring tabs 4 on the top 3 of the pressure dome 1 are designed without undercuts and can therefore be produced in one piece with the pressure dome 1 and the contact mat. Due to their elasticity, the spring tabs 4 act on the one hand as tolerance compensation between the actuating element and the pressure dome and on the other hand prevent rattling when the pressure dome is actuated.
  • the pressure mandrels are designed in accordance with FIGS. 1 and 2.
  • Shown in more detail here is the rocker-type actuating element 11, which is seated with a section 12 in a guide receptacle 13.
  • the section 12 is supported on the two pressure domes 1 and is tilted in one direction or the other relative to the guide receptacle 13 when the rocker 11 is actuated via the section 14.
  • the rocker 11 is further provided with a projection 15 which, when the rocker is actuated, is supported on a support 16 with a curved section and rolls on it .
  • the two pressure domes 1 are provided on their top 3 with a curvature formed by the spring tabs 4, on which an attack surface 17 of the rocker 11 engages.
  • the engagement surface 17 therefore rolls on the spring tabs 4 of the pressure domes 1, whereby the generation of shear forces on the pressure domes 1 is largely prevented.
  • This and the oval design of the pressure domes 1 prevent the pressure domes 1 from tilting when actuated by the rocker 11, and ensures correct actuation, combined with tactile feedback by overcoming the restoring force of the aprons 6.
  • the force-displacement diagram of the pressure domes 1 in the rocker 11 therefore corresponds to the force-displacement diagram of a pressure dome actuated by a simple button, and thus also the haptics.
  • Silicone is preferably used for the contact mat, which has proven to be advantageous in terms of manufacture, durability and operational safety.

Landscapes

  • Push-Button Switches (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
EP96120451A 1995-12-20 1996-12-19 Dispositif pour l'établissement d'une connexion électrique Expired - Lifetime EP0780863B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19547566 1995-12-20
DE19547566A DE19547566C1 (de) 1995-12-20 1995-12-20 Vorrichtung zum Herstellen einer elektrischen Verbindung

Publications (3)

Publication Number Publication Date
EP0780863A2 true EP0780863A2 (fr) 1997-06-25
EP0780863A3 EP0780863A3 (fr) 1998-07-22
EP0780863B1 EP0780863B1 (fr) 2001-09-12

Family

ID=7780645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96120451A Expired - Lifetime EP0780863B1 (fr) 1995-12-20 1996-12-19 Dispositif pour l'établissement d'une connexion électrique

Country Status (3)

Country Link
EP (1) EP0780863B1 (fr)
AT (1) ATE205631T1 (fr)
DE (2) DE19547566C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002056746A (ja) * 2000-08-07 2002-02-22 Alps Electric Co Ltd 可動接点付きシート及びシートスイッチ
US6765158B1 (en) * 2003-05-08 2004-07-20 Lear Corporation Low profile switch with flat wire harness

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603756A (en) * 1970-01-29 1971-09-07 Sperry Rand Corp Snap action switch
CH656018A5 (de) * 1983-09-19 1986-05-30 Siemens Ag Albis Tastschalter.
FR2576450A1 (fr) * 1985-01-22 1986-07-25 Hutchinson Clavier a elements de commande integres et auto-centres par rapport a sa face avant
US4654488A (en) * 1986-03-26 1987-03-31 Northern Telecom Limited Push and rocker action switch
DE3831314A1 (de) * 1988-09-15 1990-03-29 Hagenuk Telecom Gmbh Abdeckmatte fuer schaltungstraeger

Also Published As

Publication number Publication date
EP0780863B1 (fr) 2001-09-12
EP0780863A3 (fr) 1998-07-22
DE59607677D1 (de) 2001-10-18
DE19547566C1 (de) 1997-04-17
ATE205631T1 (de) 2001-09-15

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