EP0024724B1 - Commutateur à bouton-poussoir pour la télécommunication - Google Patents

Commutateur à bouton-poussoir pour la télécommunication Download PDF

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Publication number
EP0024724B1
EP0024724B1 EP80105095A EP80105095A EP0024724B1 EP 0024724 B1 EP0024724 B1 EP 0024724B1 EP 80105095 A EP80105095 A EP 80105095A EP 80105095 A EP80105095 A EP 80105095A EP 0024724 B1 EP0024724 B1 EP 0024724B1
Authority
EP
European Patent Office
Prior art keywords
springs
plastic
contact
fact
press switch
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
Application number
EP80105095A
Other languages
German (de)
English (en)
Other versions
EP0024724A1 (fr
Inventor
Karl-Heinz Ing. grad. Niederhöfer
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.)
Tenovis GmbH and Co KG
Original Assignee
Telefonbau und Normalzeit 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 Telefonbau und Normalzeit GmbH filed Critical Telefonbau und Normalzeit GmbH
Priority to AT80105095T priority Critical patent/ATE5035T1/de
Publication of EP0024724A1 publication Critical patent/EP0024724A1/fr
Application granted granted Critical
Publication of EP0024724B1 publication Critical patent/EP0024724B1/fr
Expired 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
    • H01H13/10—Bases; Stationary contacts mounted thereon

Definitions

  • the invention relates to a pressure switch for telecommunications, in particular telephone technology, in which a button with a button shaft is guided in a housing and in which plastic springs are attached between the end of the button shaft and the contact spring so that the contact springs when the button is pressed indirectly via the Plastic springs are operated.
  • Known pressure switches are mostly provided with a button and a push-button shaft and act on contact springs which are arranged next to or below the push-button shaft. They have a high construction, require complex production and are particularly prone to contact bouncing.
  • a pressure switch is already known (DE-A1 2 615 217), in which resilient plastic parts are attached between the push-button shaft and the contact springs.
  • the plastic parts protrude downwards from a guide plate and are designed as short, cam-like tabs.
  • the contact points and the actuation points for the contact springs and the plastic springs are all in one plane. This version gives poor results in terms of bounce.
  • the invention is based on the object of designing a pressure switch of the type mentioned at the outset in such a way that a simple structure which is well suited for automatic assembly and has a low overall height is achieved and that, in particular, extensive freedom from bounce is achieved.
  • the plastic part is frame-shaped and a projecting shoulder with the two plastic springs is attached to a narrow side and that the contact springs overlap the shoulder with their middle part.
  • the plastic part is expediently fastened to the associated contact parts on a printed circuit board.
  • the pressure switch shown in FIGS. 1 to 3 has a housing 1 in which the button 2 is guided with the button shaft 3.
  • the key shaft is designed as a symmetrical cross and the guide takes place in a correspondingly designed opening 4.
  • the key button 2 is inserted from the outside into the housing 1 and has resilient hooks 5 with which it lies behind the edges 6 of recesses, so that it locks itself when installed.
  • the housing is attached to an underlying circuit board 7.
  • the plastic part 8 is frame-shaped and is provided on one narrow side with a projecting projection 9 on which plastic springs 10 and 11 are attached. Parallel to the plastic springs 10 and 11, contact springs 12 and 13 are arranged, which overlap the shoulder 9 with their bow-shaped central part 14. At point 15 they are connected to the circuit board 7.
  • contact strips 16 and 17 are attached in the frame-shaped plastic part, which carry noble metal contacts 18, while the contact springs 12, 13 are provided with noble metal contacts 19.
  • An actuating projection 20, which is at a distance from the contact points 18, 19, is injection molded onto each of the plastic springs 10, 11.
  • a return spring 22 After actuation, a return spring 22 returns the button to the rest position, so that the contact springs 12, 13 and plastic springs 10, 11 also assume their starting position.
  • the pressure switch can easily be strung together to form a key block, in which case the plastic parts 8 and the contact strips 16, 17 are combined to form a unit for several keys. Their electrical connection then takes place above the printed circuit boards mainly by means of metallic contact parts, so that conductor tracks are saved.

Landscapes

  • Push-Button Switches (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Claims (7)

1. Commutateur à bouton-poussoir pour les télécommunications, en particulier pour la téléphonie, dans lequel une touche (2) avec une tige de touche (3) est guidée dans un boîtier (1) et dans lequel des ressorts en plastique (10, 11) sont disposés entre l'extrémité de la tige de touche (3) et les ressorts de contact (12, 13) de telle façon que ces ressorts (12, 13) sont actionnés indirectement par l'intermédiaire des ressorts en plastique (10, 11) lors de l'enfoncement de la touche (2), caractérisé en ce que les ressorts en plastique (10, 11 ) et les ressorts de contact (12, 13) avec leurs contre-contacts (18) disposés sur des bandes de contact (16, 17) sont logés dans une pièce en plastique (8) fixée sous le boîtier (1), et en ce que le point d'actionnement de l'extrémité (21) de la tige de touche (3) pour les ressorts en plastique (10, 11) et une saillie d'actionnement (20) injectée en une seule pièce avec les ressorts en plastique (10, 11) pour les ressorts de contact (12, 13) sont observés dans le sens longitudinal des ressorts (10 à 13), disposés à distance des points de contact (18, 19).
2. Commutateur à bouton-poussoir selon la revendication 1, caractérisé en ce que la pièce en plastique (8) est réalisée en forme de cadre et comporte sur un petit côté un talon en saillie (9) avec les deux ressorts en plastique (10, 11), et que les ressorts de contact (12, 13) passent par-dessus le talon (9) en formant étrier dans leur partie centrale (14).
3. Commutateur à bouton-poussoir selon la revendication 1, caractérisé en ce que la pièce en plastique (8) avec les pièces de contact associées est fixée sur la plaque de conducteurs (7).
4. Commutateur à bouton-poussoir selon la revendication 1, caractérisé en ce que les pièces en plastique (8) et les bandes de contact (16, 17) pour plusieurs commutateurs sont rassemblées en un bloc.
5. Commutateur à bouton-poussoir selon la revendication 1, caractérisé en ce que l'extrémité (21) de la tige de touche (3) est en forme de coin et en ce qu'on obtient un point de pression plus ou moins fort pour l'actionnement en fonction de l'angle choisi pour l'extrémité en forme de coin (21).
6. Commutateur à bouton-poussoir selon la revendication 1, caractérisé en ce que la tige de touche (3) est réalisée en forme de croix symétrique et est ainsi guidée dans une ouverture (4) correspondante du boîtier (1).
7. Commutateur à bouton-poussoir selon la revendication 3, caractérisé en ce que la liaison électrique des commutateurs au-dessus de la plaque de conducteurs (7) s'effectue par l'intermédiaire des bandes de contact (16, 17).
EP80105095A 1979-09-03 1980-08-27 Commutateur à bouton-poussoir pour la télécommunication Expired EP0024724B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80105095T ATE5035T1 (de) 1979-09-03 1980-08-27 Druckschalter fuer die nachrichtentechnik.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2935557 1979-09-03
DE2935557A DE2935557C2 (de) 1979-09-03 1979-09-03 Druckschalter für die Nachrichtentechnik.

Publications (2)

Publication Number Publication Date
EP0024724A1 EP0024724A1 (fr) 1981-03-11
EP0024724B1 true EP0024724B1 (fr) 1983-10-12

Family

ID=6079938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105095A Expired EP0024724B1 (fr) 1979-09-03 1980-08-27 Commutateur à bouton-poussoir pour la télécommunication

Country Status (4)

Country Link
EP (1) EP0024724B1 (fr)
AT (1) ATE5035T1 (fr)
AU (1) AU6195080A (fr)
DE (1) DE2935557C2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3608703A1 (de) * 1986-03-15 1987-09-24 Siedle & Soehne S Schaltelement
FR2646434B2 (fr) * 1988-06-29 1991-08-30 Inst Francais Du Petrole Formulation d'additifs pour carburants comprenant au moins une composition obtenue a partir d'une hydroxymidazoline et d'une polyamine et son utilisation comme additif pour carburants

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2462034C3 (de) * 1974-08-22 1981-10-08 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen Zum Zusammensetzen von Tastaturen geeignete Taste
US3982081A (en) * 1974-09-04 1976-09-21 Amp Incorporated Keyboard assembly with overlapped flexible printed circuit cable switch
DE2615217A1 (de) * 1976-04-08 1977-10-20 Standard Elektrik Lorenz Ag Drucktastenschalter
IT1114143B (it) * 1977-09-12 1986-01-27 Sits Soc It Telecom Siemens Tastiera per sistemi di telecomunicazioni

Also Published As

Publication number Publication date
EP0024724A1 (fr) 1981-03-11
ATE5035T1 (de) 1983-10-15
DE2935557A1 (de) 1981-03-12
DE2935557C2 (de) 1983-03-31
AU6195080A (en) 1981-03-12

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