EP0074004A2 - Intérrupteur à poussoir pour appareillage électrique - Google Patents

Intérrupteur à poussoir pour appareillage électrique Download PDF

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Publication number
EP0074004A2
EP0074004A2 EP82107694A EP82107694A EP0074004A2 EP 0074004 A2 EP0074004 A2 EP 0074004A2 EP 82107694 A EP82107694 A EP 82107694A EP 82107694 A EP82107694 A EP 82107694A EP 0074004 A2 EP0074004 A2 EP 0074004A2
Authority
EP
European Patent Office
Prior art keywords
housing part
lower housing
pressure piece
spring
push button
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Withdrawn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
EP82107694A
Other languages
German (de)
English (en)
Other versions
EP0074004A3 (fr
Inventor
Rolf Dipl.-Ing. Kreeb
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.)
Rafi GmbH and Co KG
Rafi GmbH and Co Elektrotechnische Spezialfabrik
Original Assignee
Rafi GmbH and Co KG
Rafi GmbH and Co Elektrotechnische Spezialfabrik
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 Rafi GmbH and Co KG, Rafi GmbH and Co Elektrotechnische Spezialfabrik filed Critical Rafi GmbH and Co KG
Publication of EP0074004A2 publication Critical patent/EP0074004A2/fr
Publication of EP0074004A3 publication Critical patent/EP0074004A3/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Withdrawn legal-status Critical Current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
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members

Definitions

  • the invention relates to a pushbutton for electrical devices, which consists of a lower housing part and a push piece which can be displaced relative to the force of a compression spring, which cooperates with switching contacts by means of a contact bridge and which can be used in particular for typing keyboards.
  • Pushbuttons of this type are known in numerous configurations and have also proven themselves very well in practice. Since the force of the compression spring to be overcome when the pressure piece is actuated increases linearly, it is not readily possible to determine in which adjustment range of the pressure piece the contacts come into contact. Sometimes, since the contact is not assigned a pressure point, no switching is triggered by inadequate adjustments of the pressure piece.
  • a pushbutton equipped with such a snap-action circuit thus has a pressure point since the force of the tension spring holding the contact element has to be overcome, but the construction effort is considerable. In addition, since several links work together, malfunctions can occur. With this button, the pressure point can only be set relatively softly, so that it is sometimes not fixed precisely enough.
  • the pressure point assigned to the pressure piece should be precisely defined.
  • the construction effort with which this can be accomplished is to be kept extremely low, so that not only economical production, but also high operational reliability and a long service life as well as a versatile usability are provided.
  • this is achieved with a push button of the aforementioned type in that a further bow-shaped, in the neutral position of the push button between the lower housing part and the pressure piece to the longitudinal axis of the inclined spring is used, which is supported at one end on the lower housing part and at the other end on the pressure piece and can be pivoted by this about the support on the lower housing part beyond a perpendicular dead center position.
  • the bow spring in the form of an oval, preferably with two circular arc-shaped sections lying opposite one another, the long sides of which form the ends supported on the lower housing part and the pressure piece, and one of the long sides being divided into two end pieces. In this way, not only is there a centering, but the pressure force to be overcome can also be selected to be relatively large.
  • the compression spring can also be designed as a semicircular ring, on which the ends that are supported on the lower housing part and the pressure piece, preferably running parallel to one another, are formed.
  • a bow spring Due to the installation of a bow spring in a pushbutton according to the invention, its pressure piece is assigned a precisely defined pressure point, so that faulty actuations are almost impossible. If the bow-shaped spring is pivotably inserted between the lower housing part and the pressure piece, the bow spring is pivoted around the support on the lower housing part by pressing down the pressure piece and simultaneously tensioned until it is in an axis-perpendicular position to the adjustment direction of the pressure piece. The force required to adjust it increases disproportionately according to the selected spring and drops sharply as soon as the bow spring is pivoted beyond the dead center position after the pressure point has been exceeded. The contact can thus be made immediately after overcoming the pressure point, which is determined by the amount of the counterforce of the bow spring.
  • the contact system of the push button is not influenced by the bow spring provided according to the invention. Even with a higher actuating force, which can be determined by the force of the compression spring, and a force that can be determined and thus selected by the bow spring to overcome the dead center, a low contact force can be provided in order to protect the contacts.
  • the force with which the contacts are brought into contact with the system can always be kept constant. The contact force is therefore to be selected independently of the actuation of the push button.
  • a compression spring 1 0 displaceable pressure piece 6 which is provided with a contact bridge 11 cooperating with the contacts 4 and 5.
  • the pressure piece 6 is in this case formed from a cap 7 and an intermediate piece 8, which has a molded-on pin 9 which 3-engages in a guide bore provided in the lower housing part 2.
  • the contact bridge 11, which connects the contacts 4 and 5, is inserted in a groove 13 and is subjected to constant contact force by springs 12 which are also arranged in the groove.
  • a bow-shaped spring 21 is inserted between the pressure element 6 and the lower housing part 2 and is arranged inclined to the longitudinal axis A in the starting position of the pressure element 6. 2, 4 and 6, the compression spring 21 is oval and consists of two circular arc pieces 22 and 22 ', which are connected on one side by a leg 24, on the other side projecting legs 23 and 23 'molded onto this.
  • the intermediate piece 24 and the legs 23 and 23 'thus form the ends of the bow spring 21, which are supported on the pressure piece 6 and the lower housing part 2 .
  • projecting tabs 1 4 are attached to the ring part 2 'placed on the lower housing part 2, in which slot-like recesses 25 and 25' for the legs 23 and 23 'are incorporated. And in the intermediate piece 8 a recess 26 is provided, in which the bow spring 21 is inserted with the leg 24. The bow spring 21 can thus be tensioned by the adjustment movement of the pressure piece 6.
  • the actuating force increases disproportionately in the curve region a), namely up to the dead center position of the bow spring 21, at b the actuation force drops since the bow spring 21 is relaxed after the dead center has been exceeded, except for the determined by the linear curve part c, which corresponds to the pressure force of the compression spring 1 0 .
  • the return of the pressure piece 6 is accomplished as soon as no more pressure force is exerted on it by the compression spring 10.
  • the compression spring 10 it is of course to be dimensioned in its spring force such that the force of the bow spring 21 is overcome.
EP82107694A 1981-09-09 1982-08-23 Intérrupteur à poussoir pour appareillage électrique Withdrawn EP0074004A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813135655 DE3135655A1 (de) 1981-09-09 1981-09-09 "drucktaster fuer elektrische geraete"
DE3135655 1981-09-09

Publications (2)

Publication Number Publication Date
EP0074004A2 true EP0074004A2 (fr) 1983-03-16
EP0074004A3 EP0074004A3 (fr) 1985-05-22

Family

ID=6141189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107694A Withdrawn EP0074004A3 (fr) 1981-09-09 1982-08-23 Intérrupteur à poussoir pour appareillage électrique

Country Status (3)

Country Link
EP (1) EP0074004A3 (fr)
DE (1) DE3135655A1 (fr)
HU (1) HU185727B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4330576C1 (de) * 1993-09-09 1994-11-10 Preh Elektro Feinmechanik Tastschalter
DE4316068A1 (de) * 1993-05-13 1994-11-24 Reinshagen Kabelwerk Gmbh Elektrischer Schnappschalter
DE102019108956A1 (de) * 2019-04-05 2020-10-08 Cherry Gmbh Tastenmodul für eine Tastatur, Tastatur und Verfahren zum Versehen eines Tastenstößels mit einem Drahtbügel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR645931A (fr) * 1927-12-20 1928-11-05 Ed Spengler Et H Chenu Perfectionnements aux interrupteurs à bouton-poussoir pour installations électriques
FR1211621A (fr) * 1957-08-31 1960-03-17 Philips Nv Interrupteur à axe de commande coulissant
US3641292A (en) * 1970-11-27 1972-02-08 Matsushita Electric Ind Co Ltd Pull-push-type switch
GB1309710A (en) * 1971-12-06 1973-03-14 Standard Telephones Cables Ltd Push button units
FR2228286A2 (fr) * 1971-12-06 1974-11-29 Int Standard Electric Corp
FR2251901A1 (fr) * 1973-11-17 1975-06-13 Deutsche Telephonwerk Kabel
FR2266916A1 (en) * 1974-04-08 1975-10-31 Siemens Ag Bistable snap-action indent mechanism - for use with valves and relays has split ring springs in groove in periphery of actuator shaft

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2942720C2 (de) * 1979-10-23 1982-05-27 Standard Elektrik Lorenz Ag, 7000 Stuttgart Drucktaste mit Schnappwirkung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR645931A (fr) * 1927-12-20 1928-11-05 Ed Spengler Et H Chenu Perfectionnements aux interrupteurs à bouton-poussoir pour installations électriques
FR1211621A (fr) * 1957-08-31 1960-03-17 Philips Nv Interrupteur à axe de commande coulissant
US3641292A (en) * 1970-11-27 1972-02-08 Matsushita Electric Ind Co Ltd Pull-push-type switch
GB1309710A (en) * 1971-12-06 1973-03-14 Standard Telephones Cables Ltd Push button units
FR2228286A2 (fr) * 1971-12-06 1974-11-29 Int Standard Electric Corp
FR2251901A1 (fr) * 1973-11-17 1975-06-13 Deutsche Telephonwerk Kabel
FR2266916A1 (en) * 1974-04-08 1975-10-31 Siemens Ag Bistable snap-action indent mechanism - for use with valves and relays has split ring springs in groove in periphery of actuator shaft

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316068A1 (de) * 1993-05-13 1994-11-24 Reinshagen Kabelwerk Gmbh Elektrischer Schnappschalter
US5577604A (en) * 1993-05-13 1996-11-26 Delphi Automotive Systems Deutschland Gmbh Electrical snap-action switch
DE4330576C1 (de) * 1993-09-09 1994-11-10 Preh Elektro Feinmechanik Tastschalter
US5545864A (en) * 1993-09-09 1996-08-13 Preh-Werke Gmbh & Co. Kg Push switch
DE102019108956A1 (de) * 2019-04-05 2020-10-08 Cherry Gmbh Tastenmodul für eine Tastatur, Tastatur und Verfahren zum Versehen eines Tastenstößels mit einem Drahtbügel

Also Published As

Publication number Publication date
DE3135655A1 (de) 1983-03-24
EP0074004A3 (fr) 1985-05-22
HU185727B (en) 1985-03-28

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

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18D Application deemed to be withdrawn

Effective date: 19860123

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KREEB, ROLF, DIPL.-ING.