EP0643408B1 - Interrupteur à bouton-poussoir - Google Patents

Interrupteur à bouton-poussoir Download PDF

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Publication number
EP0643408B1
EP0643408B1 EP94107338A EP94107338A EP0643408B1 EP 0643408 B1 EP0643408 B1 EP 0643408B1 EP 94107338 A EP94107338 A EP 94107338A EP 94107338 A EP94107338 A EP 94107338A EP 0643408 B1 EP0643408 B1 EP 0643408B1
Authority
EP
European Patent Office
Prior art keywords
arm
guide
push button
switch
switch rod
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.)
Expired - Lifetime
Application number
EP94107338A
Other languages
German (de)
English (en)
Other versions
EP0643408A1 (fr
Inventor
Karl-Heinz Bauer
Anton Rüttiger
Gerold Eckert
Edgar Maisch
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.)
Preh GmbH
Original Assignee
Preh 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 Preh GmbH filed Critical Preh GmbH
Publication of EP0643408A1 publication Critical patent/EP0643408A1/fr
Application granted granted Critical
Publication of EP0643408B1 publication Critical patent/EP0643408B1/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
    • 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
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/20—Driving mechanisms
    • 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
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • 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
    • H01H13/023—Light-emitting indicators

Definitions

  • the invention relates to a push button switch with a switching plunger, at the stroke of which a pressure point, a contact and a restoring voltage are generated under spring action according to the preamble of claim 1.
  • Such pushbutton switches are described in DE-GM 81 14 214, DE 35 20 848 A1, EP 0 074 004 A2, EP 0 123 818 A1 and EP 0 515 943 A2. These have their own spring elements for the functions: pressure point generation, contacting and resetting. The construction and assembly work is accordingly large. In addition, difficulties arise when the switching stroke of the switching plunger is only small and it should be ensured that the pressure point is before the switching point during the stroke.
  • the object of the invention is to propose a pushbutton switch of the type mentioned, in which, with a simple structure and with a short stroke, reliable contact actuation is achieved after a pressure point has been overcome.
  • the one-piece spring element takes over the functions of generating the pressure point, making contact or opening the contact and resetting the switching plunger.
  • the construction and assembly costs are low.
  • the spring element is also easy to manufacture as a stamped and bent part.
  • a very small construction of the pushbutton switch is possible due to the spring element.
  • a housing 1 is arranged on a circuit board 2, on which u. a. two guide surfaces 4, 5 to be connected by means of a push button switch 3.
  • the push button switch 3 has a switching plunger 6.
  • a finger 7 of the switching plunger 6 protrudes through the housing 1 and can be acted upon by an actuator 8.
  • a rib 9 is formed on the switching plunger 6 and lies in a recess 10 in the housing 1.
  • the switching plunger 6 can also be guided laterally at points 11, 12 of the housing 1 (cf. FIG. 3). In any case, the switching plunger 6 is guided with low friction in the longitudinal direction.
  • a boom 13 is formed on the switching plunger 6 and is provided with an opening 14.
  • a slope 15 is formed on the housing 1, on which the boom 13 slides in the manner described in more detail below.
  • the pushbutton switch 3 has a one-piece spring element 16, which is made from a stamped and bent part, for example from partially gold-plated V2A steel.
  • the spring element forms two hairpin-shaped curved guide legs 17, 18, which extend through the opening 14 of the switching plunger 6 and are inserted into a receptacle 19 of the housing 1.
  • the guide leg 17 merges into a connecting leg 20 which sits on the guide surface 4 in an electrically contacting manner. To improve the contact, beads can be formed on the connecting leg 20.
  • a resilient return arm 21 adjoins in a hairpin shape, the free end 22 of which rests against a knob 23 of the arm 13 of the switching plunger 6.
  • an oblique step 24 is formed on the guide leg 18 below the arm 13.
  • a resilient contact arm 26 of the spring element 16 is above the guide surface 5 in the starting position.
  • the contact arm 26 can also end in two or more contact fingers.
  • the switching plunger 6 In the starting position (FIG. 1), the switching plunger 6 is held upwards by means of the resetting arm 21 which is under prestress. The switching plunger 6 thereby finds a stop on the housing 1. Is then pressed on the actuator 8 in the direction of arrow (A), then the edge 28 of the opening 14 presses on the inclined step 24, so that the guide leg 18 pivots toward the guide leg 17, whereby a bias between the guide legs 17,18 arises. A tactile force is to be applied. The pressure increase is shown in the diagram of FIG. 7 in area (a).
  • step 24 When the edge 28 has reached the end of step 24 (cf. FIG. 2), the pressure point (D) (cf. FIG. 7) has been reached. Until then, the plunger has moved in the direction of arrow (B).
  • a lug 30 of the switching plunger 6 strikes the contact arm 26 so that it deforms, as a result of which the contact pressure is increased (cf. FIG. 4).
  • This pressure range is designated by (d) in the diagram according to FIG. 10.
  • the contact pressure (P) of the contact arm 26 on the guide surface 5 is greater than the pressure at the pressure point (D).
  • the stroke of the switching plunger 6 is between 1 mm and 2 mm, in the diagram according to FIG. 10 approximately 1.2 mm.
  • the pressure point (D) is reached at 0.25 mm.
  • the actuator 8 is tiltably mounted on the housing 1 in the exemplary embodiment (see FIGS. 3, 5). It can be tilted about a projection 31 which faces an actuating surface 32 for the finger 7 of the switching plunger 6.
  • a light guide 33 is fastened to the actuating element 8 and faces an LED light source 34 of the circuit board 2.
  • the switching plunger 6 can also be switched with other actuators 8.
  • the circuit board 2 is provided with openings associated with the pushbutton switch 3 or that a soldered connection must be made.
  • the contacting of the guide surfaces 4, 5 takes place by simply pressing on the pushbutton switch 3, in particular the connecting leg 20 and, in the case of switching, its contact arm 26.
  • the tilting movement of the switching plunger 6 in the direction of arrow (C) after reaching the pressure point (D) is not achieved by the bevel 15 and a corresponding shaping of the arm 13.
  • the tilting movement is advantageous because, when the opening 14 is removed from the force applied to the finger 7, it leads to reduced friction and enables a high contact pressure (P).
  • a formation 35 is formed at the lower end of the guide leg 17 in order to produce this tilting movement, which, after reaching the pressure point (D), meets an edge 36 of the opening 14 opposite the edge 28.
  • the one-piece spring element 16 also takes over the function of tilt control of the switching plunger 6.

Landscapes

  • Push-Button Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)

Claims (4)

  1. Interrupteur à bouton-poussoir comportant un poussoir de commutation (6), lors de la course de poussée duquel un déplacement de commutation et une tension mécanique de rappel sont provoqués et un élément élastique (16) en une seule pièce, bon conducteur de l'électricité, qui forme d'une part un bras (26) de contact mobile et d'autre part un bras (21) de rappel élastique qui s'appuie sur le poussoir de commutation (21), des branches de guidage (18) élastiques, courbées en forme d'épingle à cheveux, étant formées sur l'élément élastique (16) entre le bras de contact (26) et le bras de rappel (21), et au moins un gradin incliné (24) étant formé sur la branche de guidage qui se raccorde au bras de contact (26), gradin sur lequel agit le poussoir de commutation (6) lors de sa course, avec un pivotement de la branche de guidage (18), et de ce fait du bras de contact (26), le bras de contact étant associé à une première surface de contact (5) d'une platine (2) et une branche de liaison (20) de l'élément élastique (16) reliant le bras de rappel (21) à l'une des branches de guidage étant en appui sur une deuxième surface (18) de contact de l'interrupteur à bouton-poussoir (3); la branche de liaison (20) présentant, avec le bras de rappel (21), une forme d'épingle à cheveux, caractérisé en ce que le poussoir de commutation (6) est guidé dans le sens longitudinal dans la direction d'actionnement (B) et est susceptible d'être mis en basculement obliquement par rapport à la direction d'actionnement (B), en ce qu'après le passage du gradin (24) il est guidé par une rampe (15) ou par une proéminence (35) située sur une branche de guidage (17) et en ce qu'il pousse l'une (18) des branches de guidage plus loin contre l'autre branche de guidage (17), si bien que le bras de contact (26) se rabat sur la surface conductrice (5).
  2. Interrupteur à bouton-poussoir selon la revendication 1, caractérisé en ce que le poussoir de commutation (6) présente une saillie en forme d'équerre (13) comportant un ajour (14) dans lequel passent les branches de guidage (17, 18), les branches de guidage (17, 18) étant situées près du dispositif d'actionnement (b) agissant sur le poussoir de commutation (6).
  3. Interrupteur à bouton-poussoir selon l'une des revendications précédentes, caractérisé en ce que le poussoir de commutation (6) présente une dent (30) qui exerce une poussée sur le bras de contact (26) appliqué sur la surface de contact (5).
  4. Interrupteur à bouton-poussoir selon la revendication 3, caractérisé en ce que la poussée, avec laquelle le poussoir de commutation (6) exerce une poussée du bras de contact (26) sur la surface de contact (5), est supérieure à la poussée exercée au point de poussée (D).
EP94107338A 1993-09-09 1994-05-11 Interrupteur à bouton-poussoir Expired - Lifetime EP0643408B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4330576A DE4330576C1 (de) 1993-09-09 1993-09-09 Tastschalter
DE4330576 1993-09-09

Publications (2)

Publication Number Publication Date
EP0643408A1 EP0643408A1 (fr) 1995-03-15
EP0643408B1 true EP0643408B1 (fr) 1997-07-30

Family

ID=6497283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94107338A Expired - Lifetime EP0643408B1 (fr) 1993-09-09 1994-05-11 Interrupteur à bouton-poussoir

Country Status (5)

Country Link
US (1) US5545864A (fr)
EP (1) EP0643408B1 (fr)
JP (1) JPH07169364A (fr)
DE (1) DE4330576C1 (fr)
ES (1) ES2106405T3 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2742575B1 (fr) * 1995-12-19 1998-01-09 Europ Equip Menager Dispositif a touche sensitive
US5821490A (en) * 1996-07-26 1998-10-13 Yazaki Corporation Push button switch module
FR2753832B1 (fr) * 1996-09-26 1998-10-23 Interrupteur electrique pour la detection de l'introduction d'une cle dans un antivol de vehicule automobile
US5983026A (en) * 1998-06-11 1999-11-09 Eastman Kodak Company One-time-use camera with variable format film encoder
DE19834375C1 (de) * 1998-07-30 1999-12-09 Preh Elektro Feinmechanik Leiterplatte
DE10250262A1 (de) 2001-11-02 2003-05-15 Marquardt Gmbh Elektrischer Schalter
DE10237207B3 (de) * 2002-08-14 2004-02-05 Braun Gmbh Tastschalter
DE102010026516B4 (de) * 2010-07-08 2013-04-11 Austriamicrosystems Ag Feder für einen Drucktaster, Federanordnung und Tasteranordnung
DE102015200177B4 (de) 2015-01-09 2022-12-08 Volkswagen Aktiengesellschaft Bedienelement zur Auswahl eines Betriebsmodus eines Fahrzeugs

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2450742C2 (de) * 1974-10-25 1984-02-02 J.& J. Marquardt, 7201 Rietheim-Weilheim Elektrischer Schalter
DE2510902C3 (de) * 1975-03-13 1979-10-04 J. & J. Marquardt, 7201 Rietheim Elektrischer Schalter
DE2556461A1 (de) * 1975-12-15 1977-06-16 Baer Elektrowerke Kg Elektrischer schalter
DE2729216C2 (de) * 1977-06-29 1979-08-02 Adam Opel Ag, 6090 Ruesselsheim Schalter für die Betätigung einer elektrischen Leuchte in Fahrzeugen, insbesondere Kraftfahrzeugen
AU531859B2 (en) * 1979-03-10 1983-09-08 Amp Incorporated Electrical switch
DE8114214U1 (de) * 1981-05-14 1981-11-05 Fa. Leopold Kostal, 5880 Lüdenscheid Drucktastenschalter
DE3135655A1 (de) * 1981-09-09 1983-03-24 Rafi Gmbh & Co Elektrotechnische Spezialfabrik, 7981 Berg "drucktaster fuer elektrische geraete"
DE8309913U1 (de) * 1983-04-05 1985-03-28 Dr. Eugen Sasse GmbH Bauelemente für die Elektronik, 8540 Schwabach Tastaturtaste, insbesondere für Fernsprechtastenapparate
KR900002525Y1 (ko) * 1984-07-11 1990-03-30 알프스덴기 가부시기 가이샤 푸시 버튼 스위치
DE3622962A1 (de) * 1986-07-09 1988-01-21 Schadow Rudolf Gmbh Drucktastenschalter, insbesondere tastschalter
CH671648A5 (en) * 1987-02-13 1989-09-15 Contraves Ag Electric contact device for keyboard switch - uses double armed contact element between pushbutton operating element and fixed counter contact pin
US4789764A (en) * 1987-12-21 1988-12-06 Illinois Tool Works Inc. Pushbutton switch with resilient extensible pivotable contact element
ES2077913T3 (es) * 1991-05-27 1995-12-01 Marquardt Gmbh Pulsador.
DE9314076U1 (de) * 1993-09-17 1993-11-25 Wang Kun Chu Taste für eine Computertastatur

Also Published As

Publication number Publication date
JPH07169364A (ja) 1995-07-04
US5545864A (en) 1996-08-13
EP0643408A1 (fr) 1995-03-15
DE4330576C1 (de) 1994-11-10
ES2106405T3 (es) 1997-11-01

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