EP0556426A1 - Ensemble d'interrupteur de clavier - Google Patents

Ensemble d'interrupteur de clavier Download PDF

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Publication number
EP0556426A1
EP0556426A1 EP92102761A EP92102761A EP0556426A1 EP 0556426 A1 EP0556426 A1 EP 0556426A1 EP 92102761 A EP92102761 A EP 92102761A EP 92102761 A EP92102761 A EP 92102761A EP 0556426 A1 EP0556426 A1 EP 0556426A1
Authority
EP
European Patent Office
Prior art keywords
elastic body
housing
plunger
key
switch assembly
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Withdrawn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
EP92102761A
Other languages
German (de)
English (en)
Inventor
Liao No. 6-4 Alley 85 Ping-Chieng
Shu Chien-Shih
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.)
Acer Inc
Original Assignee
Acer Inc
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 Acer Inc filed Critical Acer Inc
Priority to EP92102761A priority Critical patent/EP0556426A1/fr
Publication of EP0556426A1 publication Critical patent/EP0556426A1/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Withdrawn legal-status Critical Current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
    • H01H13/70—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
    • H01H13/702—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/705—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2233/00—Key modules
    • H01H2233/01—Key modules mounted on laykey
    • H01H2233/02—Key modules mounted on laykey captured between assembled parts of support
    • H01H2233/022—Key modules mounted on laykey captured between assembled parts of support with limited freedom

Definitions

  • the present invention relates generally to a switch assembly and more particularly to a switch assembly used in the keyboard of a portable computer.
  • a prior art switch assembly 2 for a notebook computer keyboard is shown in fig.1(a) and (b).
  • a plunger 21 is extended downward from a key cap 20 of the switch assembly 2.
  • One end of the plunger 21 has a detention means 211, and a support structure 24 is extended from the central bottom portion of the key cap 20.
  • the plunger 21 and the support structure 24 of the key cap 20 are received in the space inside the housing 23 and slide along the edge of the opening of the housing 23 reciprocally according to the depressing or releasing action of the user.
  • a mounting means 221 of an elastic body 22 is used for supporting the bottom of the supporting structure 24.
  • the elastic body 22 As the key cap 20 is depressed downward to a certain position, the elastic body 22 is deformed as shown in FIG.1(b).
  • the elastic body 22 has an actuating point 222 by which the contact point of encoder circuit is conducted when the supporting structure 24 is at its lowest position.
  • the encoder circuit of the computer keyboard is a known art and will not be disclosed further herein.
  • the switch assembly for use on a membrane switch preferably comprises: a housing, the housing has an open end sitting on the membrane switch, the other end of the housing has an passage; a key, the key has a key cap and a plunger extended from bottom of the key cap, one end of the plunger has a detention means, the plunger is received in space of the housing through the passage of the housing; and a elastic body, the elastic body is placed in the space of the housing and rested on the membrane switch, the elastic body has a mounting means; wherein the detention means is rested on the mounting means of the elastic body, and the key is moved reciprocally along the passage of the housing under the control of the user and elastic body.
  • FIG. 1(a) shows a cross section view of a switch assembly in accordance with the conventional art.
  • FIG 1(b) shows a cross section vies of the switch assembly of FIG 1(a) when depressed.
  • FIG. 1(c) shows bottom view of the key cap of FIG 1(a).
  • FIG. 2(a) shows a cross section view of a switch assembly in accordance with the present invention.
  • FIG. 2(b) shows bottom view of the key cap of FIG. 2(a).
  • the present invention comprises a housing 13, a key 1 and an elastic body 12.
  • the housing 13 has one open end sitting on the membrane switch 14.
  • the other end of the housing 13 has a passage.
  • the key 1 has a key cap 10 and a plunger 11 is extended downward from the bottom of the key cap 10.
  • the plunger 11 has a detention means 111 on its end.
  • the detention means 111 is detained by the edge of the passage of the housing 13 when the plunger 11 is moving upward due to the force of the elastic body 12. Therefore, the key 1 will not detached from the housing 13 under the operational condition.
  • the plunger 11 is moved reciprocally inside of the housing 13 along the passage of the housing under the action of the user.
  • the elastic body 12 is placed inside the housing 13 and rests on the membrane switch 14.
  • the elastic body 12 has a mounting means 121 and the detention means 111 of the plunger 11 rests thereon.
  • the diameter of the elastic body 12 may be made larger than that of the conventional art.
  • the contact diameter of the plunger 11 and the mounting means 121 is larger than in the conventional art so that a much better stability is achieved while the key of the present invention is depressed downward.

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  • Push-Button Switches (AREA)
EP92102761A 1992-02-19 1992-02-19 Ensemble d'interrupteur de clavier Withdrawn EP0556426A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92102761A EP0556426A1 (fr) 1992-02-19 1992-02-19 Ensemble d'interrupteur de clavier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92102761A EP0556426A1 (fr) 1992-02-19 1992-02-19 Ensemble d'interrupteur de clavier

Publications (1)

Publication Number Publication Date
EP0556426A1 true EP0556426A1 (fr) 1993-08-25

Family

ID=8209347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92102761A Withdrawn EP0556426A1 (fr) 1992-02-19 1992-02-19 Ensemble d'interrupteur de clavier

Country Status (1)

Country Link
EP (1) EP0556426A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6390699B1 (en) 1999-11-29 2002-05-21 Associate Technology Limited Keyboard with moveable base plate providing key travel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2309041A1 (de) * 1972-03-04 1973-09-06 Philips Nv Drucktastenbedienungselement mit durchschusskupplung
EP0078953A1 (fr) * 1981-11-06 1983-05-18 Inventio Ag Bouton poussoir pour interrupteur électrique
GB2130016A (en) * 1982-11-11 1984-05-23 Sharp Kk Electrical push button switch
EP0240791A2 (fr) * 1986-03-27 1987-10-14 Brother Kogyo Kabushiki Kaisha Dispositif interrupteur capacitif pour clavier
EP0423924A1 (fr) * 1989-09-27 1991-04-24 Hewlett-Packard Company Touche de commutateur à grand déplacement et rétroaction accentuée

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2309041A1 (de) * 1972-03-04 1973-09-06 Philips Nv Drucktastenbedienungselement mit durchschusskupplung
EP0078953A1 (fr) * 1981-11-06 1983-05-18 Inventio Ag Bouton poussoir pour interrupteur électrique
GB2130016A (en) * 1982-11-11 1984-05-23 Sharp Kk Electrical push button switch
EP0240791A2 (fr) * 1986-03-27 1987-10-14 Brother Kogyo Kabushiki Kaisha Dispositif interrupteur capacitif pour clavier
EP0423924A1 (fr) * 1989-09-27 1991-04-24 Hewlett-Packard Company Touche de commutateur à grand déplacement et rétroaction accentuée

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6390699B1 (en) 1999-11-29 2002-05-21 Associate Technology Limited Keyboard with moveable base plate providing key travel

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Withdrawal date: 19930806