EP0841674A1 - Elektrischer Taster - Google Patents

Elektrischer Taster Download PDF

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Publication number
EP0841674A1
EP0841674A1 EP97402606A EP97402606A EP0841674A1 EP 0841674 A1 EP0841674 A1 EP 0841674A1 EP 97402606 A EP97402606 A EP 97402606A EP 97402606 A EP97402606 A EP 97402606A EP 0841674 A1 EP0841674 A1 EP 0841674A1
Authority
EP
European Patent Office
Prior art keywords
key
contact
deformable
button
element according
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
EP97402606A
Other languages
English (en)
French (fr)
Other versions
EP0841674B1 (de
Inventor
Daniel Demari
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.)
Apem
Original Assignee
Apem
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 Apem filed Critical Apem
Publication of EP0841674A1 publication Critical patent/EP0841674A1/de
Application granted granted Critical
Publication of EP0841674B1 publication Critical patent/EP0841674B1/de
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
    • 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
    • H01H13/7006—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 comprising a separate movable contact element for each switch site, all other elements being integrated in layers

Definitions

  • the present invention relates to an electrical push button element which can be used, for example, with electrical keyboards to establish electrical contact and produce a particular command or control signal.
  • an element forming an electrical push button of the type comprising a key which can be inserted into a fixed body in order to deform a metallic contact cup from a determined stroke of the key and to establish an electrical contact.
  • this known push-button element is designed in such a way that the force for pressing the button depends solely on the force necessary to deform the electrical contact cup.
  • the invention provides an element forming an electrical push button comprising a key which can be inserted into a fixed body in order to deform a metallic contact cup from a determined stroke of the key and to establish an electrical contact, and which is characterized in that it comprises a part made of an elastically deformable material housed in the fixed body below the key so as to adjust, depending on the material used for the deformable part, the force of pressing the key to deform the contact cup.
  • the element key is supported, on the one hand, on a peripheral part of the part deformable by a lower face of a peripheral rim of the key formed in the lower part thereof and, on the other hand, by the reaction force of the deformable part, on a peripheral edge of the fixed body, which delimits an opening for passage of the key, by the upper face of the peripheral rim of the key.
  • the lower face of the peripheral rim of the key is in abutment on the deformable part by means of a circular bead secured to this face.
  • the key comprises a central stud bearing on the top of the contact cup and a height substantially equal to the thickness of the deformable part.
  • This deformable part is preferably in the form of a washer, the central hole of which contains the contact cup.
  • the deformable part comprises a base part on the upper face of which is supported the circular bead of the key and in contact on the top of the contact cup; a first annular projecting portion integral with the underside of the base portion and bearing on a portion forming the bottom of the fixed body so as to form with the base portion a housing for holding the contact cup; and a second annular projecting part secured to the upper face of the base part and pressing on the lower part of the key.
  • the base part of the deformable part comprises a central recess in the form of a concave spherical cap in which is housed the apex of the conjugate shape of the contact cup.
  • the first and second annular projecting parts have the same height and the second annular part is of a diameter less than that of the first annular part situated approximately in line with the circular bead.
  • the deformable part is made of foam or elastomeric material.
  • the invention also provides a keyboard device with at least one push button element as defined above and which is characterized in that the body of the push button element is fixed to a flexible membrane of the keyboard by the intermediate a rigid fixing plate located on the other side of the flexible membrane and the contact cup comprises several tabs connected to electrical contact points of the membrane connected to at least one particular electrical control or command circuit.
  • the keyboard device is used to control the audible warning circuit of a motor vehicle and is mounted in the steering wheel of this vehicle.
  • the flexible membrane of the keyboard device is arranged behind an air bag integrated into the vehicle's steering wheel.
  • the flexible membrane comprises four elements forming a push button respectively fixed substantially at the four corners thereof.
  • Figure 1 is a sectional view of an element forming an electrical push button according to a first embodiment of the invention.
  • FIG. 2 is a schematic view of a device forming a keyboard with several elements forming a push button according to a second embodiment of the invention and mounted behind the airbag integrated into the steering wheel of a motor vehicle.
  • Figure 3 is an enlarged view of the part circled in III of a push button element of the second embodiment of the invention.
  • FIG. 4 is a top view of a flexible membrane with at least one element forming an electrical push button of the invention which can be used in the device forming the keyboard of FIG. 2.
  • the element forming an electrical push button as shown in FIG. 1 is of the type comprising a body 1 of generally cylindrical shape fixed to a support 2, such as a printed circuit board, a flexible membrane, or the like, which can be part of a device forming keyboard; a key 3 retained in the fixed body 1 and which can sink axially therein to deform a metallic contact cup 4 from a determined stroke of the key 3 and establish an electrical contact.
  • the contact cup 4, housed in the body 1, comprises, as is known per se, a certain number of tabs (not shown), for example four in number, electrically connected respectively to metallic points of electrical contact of the support 2 connected to one or more particular electrical circuits via conductive tracks of the support 2 (not shown).
  • the deformation by the button 3 of the cup 4 causes the latter to come into contact with a central point of electrical contact to circulate current between the various electrical contact points associated respectively with the tabs of the cup.
  • the body 1 is fixed to the membrane 2 by means of a rigid plate or fixing base 5 situated on the side of the membrane 2 opposite to that where the body 1 rests so that this membrane is sandwiched between the body 1 and the fixing plate 5, which can be circular.
  • the attachment of the body 1 to the plate 5 can be carried out by small cylindrical metallic axes (not shown) force fitted into the plate 5 and the body 1 by crossing the membrane 2 transversely thereto as symbolized by the dashed lines. in figure 1.
  • the push-button element also comprises a part 6 made of an elastically deformable material housed in the body 1 between the button 3 and the support 2 forming the bottom of the body 1 so as to adjust, depending on the material used for the deformable part 6, the force of pressing the button 3 to deform the contact cup 4.
  • the deformable part 6 is made of a foam plastic material which at the same time seals the element forming a push button.
  • the deformable part 6 is preferably in the form of a washer, in the central hole 6a of which is housed and maintained the contact cup 4.
  • the key 3 is supported on an upper peripheral part of the deformable part 6 by a lower face of a peripheral rim 3a of the key 3 formed in the lower part of this key and, on the other hand, by the reaction force of the deformable part 6, on a peripheral edge 1a of the body 1, which delimits an opening 1b for passage of the cylindrical external part 3b of the key, by the upper face of the peripheral rim 3a of this key.
  • the lower face of the peripheral rim 3a of the key 3 is in abutment on the deformable part 6 by means of a circular bead 7 secured to this face.
  • the key 3 also comprises a central cylindrical stud 8 bearing on the top of the contact cup 4 and of a height substantially equal to the thickness of the deformable part 6.
  • the operator To deform the contact cup 4 and thus establish an electrical contact by it on the support 2, the operator must exert an effort on the key 3 predetermined penetration dependent on the material used to make the deformable part 6.
  • the force required to press the key 3 and deform the metal cup 4 is also changed.
  • the material of the part 6 is defined in the factory according to the desired pressing force of the key.
  • FIG. 2 represents in a nonlimiting manner the particular application of a device forming a keyboard of the flexible membrane type of the kind of that represented in FIG. 1 for controlling an electrical sound warning circuit of a motor vehicle, the device forming a keyboard then being mounted in the steering wheel thereof, preferably behind the air bag system housed in a housing 9 integrated into the steering wheel.
  • the flexible membrane of this keyboard device can comprise a certain number of elements forming a push-button of the type represented in FIG. 1, for example four elements forming a push-button fixed respectively to four corners of the membrane as will be seen with reference to Figure 4 so as to allow the driver of the motor vehicle to use the audible warning device by actuating, by pressing on the steering wheel, one of these four elements.
  • FIG. 2 in conjunction with FIG. 3, shows another possible embodiment of each element forming a push button of the invention which can be mounted on the membrane 2 in place of the element of FIG. 1.
  • the deformable part 6 comprises a base part 6b on the upper face of which is supported the circular bead 7 of the key 3, the part 6b being in contact on the top of the contact cup 4; a first annular projecting part 6c secured to the underside of the base part 6b of the part 6 and bearing on the membrane 2 so as to form with the base part 6b a housing for holding the contact cup 4; and a second annular projecting part 6d secured to the upper face of the base part 6b and resting on the lower part of the key 3 comprising the annular rim 3a.
  • the first and second annular projecting parts 6c, 6d have the same height and the second annular part 6d is of a smaller diameter than that of the first annular part 6c which is situated approximately in line with the circular bead 7.
  • the base part 6b of the deformable part 6 comprises a central recess 6e in the form of a concave spherical cap in which is housed the apex of conjugate form of the contact cup 4 so as to positively hold the cup under the deformable part 6.
  • Each circular fixing plate 5 of a push-button element fixed to the membrane 2 is embedded in a recess of conjugate shape 10 produced in the upper surface of a plate 11 for fixing the assembly to the steering wheel with the membrane 2 resting on this upper face.
  • FIG. 4 represents a flexible membrane 2 of a device forming a keyboard mounted in the steering wheel of a motor vehicle for actuating the audible warning device thereof.
  • This figure shows the membrane 2 provided with a complete push button element fixed to the right corner and whose body 1, the key 3 can be seen, as well as, by transparency, the fixing plate or base 5.
  • the other elements forming push-buttons located respectively in the other three corners of the membrane 2 have not been completely represented, since only the metallic contact cup 4 of each of them is visible and comprises the four tabs 4a electrically connected to the electrical contact points corresponding 12 which can be seen in part in FIG. 4 and which are electrically connected to the conductive tracks 13 etched in the membrane 2.
  • the conductive tracks 13 are connected to a sheet 14 with conductive connecting tracks 15 connected to the electrical signaling circuit of the motor vehicle so as to activate the latter when one of the keys 3 of a push button element is pressed.
  • the push button element described above of the invention has a pressing force on its corresponding button independent of the electrical contact and / or of the mechanism for controlling this contact, unlike the known push button elements.
  • the deformable part of this element effectively suppresses the vibrations of the corresponding cup capable of inducing parasitic noise.
  • the push button element of the invention can be applied to any type of keyboard for forming so-called tactile keys.
EP97402606A 1996-11-06 1997-10-31 Elektrischer Taster Expired - Lifetime EP0841674B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9613536A FR2755534B1 (fr) 1996-11-06 1996-11-06 Element formant bouton-poussoir electrique
FR9613536 1996-11-06

Publications (2)

Publication Number Publication Date
EP0841674A1 true EP0841674A1 (de) 1998-05-13
EP0841674B1 EP0841674B1 (de) 2002-06-19

Family

ID=9497378

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97402606A Expired - Lifetime EP0841674B1 (de) 1996-11-06 1997-10-31 Elektrischer Taster

Country Status (6)

Country Link
US (1) US6008460A (de)
EP (1) EP0841674B1 (de)
JP (1) JPH10188722A (de)
KR (1) KR19980042158A (de)
FR (1) FR2755534B1 (de)
NO (1) NO975098L (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019063371A1 (fr) * 2017-09-27 2019-04-04 Autoliv Development Ab Système de commande d`avertisseur sonore de vehicule

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000215754A (ja) 1999-01-26 2000-08-04 Nec Shizuoka Ltd 電子機器の操作ボタン構造
JP3773743B2 (ja) * 2000-02-29 2006-05-10 三洋電機株式会社 電気かみそり
FR2913810B1 (fr) * 2007-03-13 2009-05-22 Crouzet Automatismes Soc Par A Dispositif de detection et siege comportant un tel dispositif
TWM317614U (en) * 2007-03-27 2007-08-21 Darfon Electronics Corp Keyboard
US8302988B2 (en) 2008-03-10 2012-11-06 Hendrickson Usa, L.L.C. Suspension assembly with tie-plate
JP4747377B2 (ja) * 2008-06-06 2011-08-17 Ｓｍｋ株式会社 押釦ユニット
JP5249827B2 (ja) * 2009-03-17 2013-07-31 アルプス電気株式会社 スイッチ用可動接点およびスイッチ装置
US8939466B2 (en) 2010-02-23 2015-01-27 Judco Partnership, Llc Airbag frame apparatus
US8491003B2 (en) * 2010-02-23 2013-07-23 Judco Manufacturing, Inc. Airbag frame apparatus
USD672287S1 (en) 2010-09-05 2012-12-11 Hendrickson Usa, L.L.C. Frame-hanger-to-frame-hanger tie-plate
USD672286S1 (en) 2010-09-05 2012-12-11 Hendrickson Usa, L.L.C. Suspension assembly
US8262112B1 (en) 2011-07-08 2012-09-11 Hendrickson Usa, L.L.C. Vehicle suspension and improved method of assembly
AU2012282874B2 (en) 2011-07-08 2014-09-25 Hendrickson Usa, L.L.C. Vehicle suspension and improved method of assembly
US9004512B2 (en) 2011-07-08 2015-04-14 Hendrickson Usa, L.L.C. Shear spring useful for vehicle suspension
USD700113S1 (en) 2012-07-06 2014-02-25 Hendrickson Usa, L.L.C. Suspension assembly
USD700112S1 (en) 2012-07-06 2014-02-25 Hendrickson Usa, L.L.C. Progressive rate spring for a suspension
US9085212B2 (en) 2013-03-15 2015-07-21 Hendrickson Usa, L.L.C. Vehicle suspension
US9150071B2 (en) 2013-07-25 2015-10-06 Hendrickson Usa, L.L.C. Frame hanger for vehicle suspension
NO2854296T3 (de) 2013-09-27 2018-05-12

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4304973A (en) * 1978-12-11 1981-12-08 Otis Elevator Company Rugged low force switch apparatus
WO1982001100A1 (en) * 1980-09-17 1982-04-01 Ncr Co Keyboard and method of producing a keyboard
EP0446088A1 (de) * 1990-03-08 1991-09-11 Sextant Avionique Schalter mit Berührungseffekt und diesen Schalter verwendende Tastatur
EP0461529A2 (de) * 1990-06-11 1991-12-18 Fujitsu Limited Druckschalter mit verbessertem Betätigungsglied

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US3921750A (en) * 1973-07-16 1975-11-25 Max Shames Vehicle brake warning light system accelerator pedal switch
US4029916A (en) * 1975-04-18 1977-06-14 Northern Electric Company Limited Multi-contact push-button switch and plural embodiment for keyboard switch assembly
US4031348A (en) * 1975-11-20 1977-06-21 Microma Incorporated Push-button assembly switch for watches
US4170104A (en) * 1976-12-01 1979-10-09 Citizen Watch Company Limited Switch mechanism for wristwatch
FR2504721A1 (fr) * 1981-04-22 1982-10-29 Telecomm El Aeronaut Maritime Dispositif formant panneau pour clavier et/ou touches individuelles ou boutons-poussoirs associes
US4386254A (en) * 1981-06-15 1983-05-31 Timex Corporation Rocker switch
US4417294A (en) * 1981-08-28 1983-11-22 Illinois Tool Works Inc. Capacitive keyswitch
JPH0436522Y2 (de) * 1987-05-20 1992-08-28
US5199557A (en) * 1988-01-28 1993-04-06 Mec A/S Method of producing an electric or electronic component, a method of producing a key and a key
US4934735A (en) * 1988-12-12 1990-06-19 General Motors Corporation Switch assembly for modular occupant restraint system
CH677552A5 (de) * 1989-04-10 1991-05-31 Sulzer Ag
US5765860A (en) * 1996-02-16 1998-06-16 Autoliv Asp, Inc. Apparatus for mounting an inflatable vehicle occupant restraint module to a vehicle steering wheel
US5767466A (en) * 1996-07-24 1998-06-16 Ut Automotive Dearborn, Inc. Flexible switch for a vehicle steering wheel assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4304973A (en) * 1978-12-11 1981-12-08 Otis Elevator Company Rugged low force switch apparatus
WO1982001100A1 (en) * 1980-09-17 1982-04-01 Ncr Co Keyboard and method of producing a keyboard
EP0446088A1 (de) * 1990-03-08 1991-09-11 Sextant Avionique Schalter mit Berührungseffekt und diesen Schalter verwendende Tastatur
EP0461529A2 (de) * 1990-06-11 1991-12-18 Fujitsu Limited Druckschalter mit verbessertem Betätigungsglied

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019063371A1 (fr) * 2017-09-27 2019-04-04 Autoliv Development Ab Système de commande d`avertisseur sonore de vehicule
CN111132874A (zh) * 2017-09-27 2020-05-08 奥托立夫开发公司 车辆喇叭控制系统
US11548439B2 (en) 2017-09-27 2023-01-10 Autoliv Development Ab Vehicle horn control system

Also Published As

Publication number Publication date
US6008460A (en) 1999-12-28
NO975098D0 (no) 1997-11-05
NO975098L (no) 1998-05-07
JPH10188722A (ja) 1998-07-21
KR19980042158A (ko) 1998-08-17
FR2755534A1 (fr) 1998-05-07
FR2755534B1 (fr) 1998-12-11
EP0841674B1 (de) 2002-06-19

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