EP0035189A1 - Druckknopf für ein Steuertastenfeld und Verfahren zur Herstellung eines solchen Druckknopfes - Google Patents

Druckknopf für ein Steuertastenfeld und Verfahren zur Herstellung eines solchen Druckknopfes Download PDF

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Publication number
EP0035189A1
EP0035189A1 EP81101212A EP81101212A EP0035189A1 EP 0035189 A1 EP0035189 A1 EP 0035189A1 EP 81101212 A EP81101212 A EP 81101212A EP 81101212 A EP81101212 A EP 81101212A EP 0035189 A1 EP0035189 A1 EP 0035189A1
Authority
EP
European Patent Office
Prior art keywords
piston
button
contact
push button
mold
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
EP81101212A
Other languages
English (en)
French (fr)
Other versions
EP0035189B1 (de
Inventor
Jean-François Daroux
Hervé Allmendinger
Gilbert Schneider
Guy Wotling
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.)
ALE International SAS
Original Assignee
Telic Alcatel SA
La Telephone Industrielle et Commerciale Telic Alcatel SA
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 Telic Alcatel SA, La Telephone Industrielle et Commerciale Telic Alcatel SA filed Critical Telic Alcatel SA
Publication of EP0035189A1 publication Critical patent/EP0035189A1/de
Application granted granted Critical
Publication of EP0035189B1 publication Critical patent/EP0035189B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • 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
    • H01H13/14—Operating parts, e.g. push-button
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/02—Energy stored by the attraction or repulsion of magnetic parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/036—Return force
    • H01H2221/04—Return force magnetic

Definitions

  • the present invention relates to a push button for a control keyboard, comprising at least one pair of electrical contacts brought into contact by acting on the push button, and to a method for manufacturing such a push button.
  • the components of a push button are usually assembled either by crimping the metal parts on the body of the push button, or by nesting the metal parts between two plastic parts.
  • the object of the invention is to simplify manufacture, by simultaneously positioning and calibrating the different parts constituting the push button.
  • the subject of the invention is a push button for a control keyboard, comprising at least one pair of electrical contacts secured to a support part and brought into contact by acting on the push button, a button body constituted by a sliding piston.
  • a cover the cover having a magnetic surface cooperating with a metal counter plate integral with the piston to constitute a magnetic return device for the push button, characterized in that the electrical contact support part and the metal counter plate are assembled on the piston of the button by overmolding.
  • FIGS. 1 and 2 there is shown a keyboard 1 provided with its identical pushbuttons 2 arranged in several rows above a printed circuit 3 with outputs 4. One of the push-buttons is shown in section in Figure 2.
  • This push button is shown in enlarged view in ' Figure 3 with its separate elements and in Figure 4 after assembly of its elements. It comprises a button head 2 which may possibly consist of two parts 5 and 7 obtained during a double injection molding operation, for example, in order to mark the key; the lower part 7 is mounted by clipping onto a vertical piston 6, forming the body of the button, by means of two hooks 8 formed on the edge of the piston ,. which engage in two notches 10 formed inside the head.
  • This piston 6 is slidably mounted in a cylinder 9 forming a guide barrel. The latter is integral with the cover 11 of the keyboard and clearly protrudes above the upper level of the cover.
  • the counter plate 14 and the contact parts 15 are assembled at the base of the piston 6 by means of an insulating head 18 produced during the molding of the button piston, as will be seen below.
  • the shape of the counterplate 14 is shown in Figure 5; it comprises a central orifice 19 for the passage of the piston 6 and the cutouts 20, 21 making it possible to pre-wire the contact blades 16 and 17 during assembly.
  • the shape of the contact piece 15 is shown in Figure 6; it includes a central part 22 provided with an orifice 50 for the passage of the piston 6 and two lateral tabs 16, 17 forming contact springs and terminated by contact pads 23, 24 intended to come into contact with metallized pads of the circuit printed 3 (fig. 4).
  • Figure 4 shows the push button in the rest position. In this position, the piston 6 is held in the high position by magnetic attraction between the metal counter plate 14 and the magnetic sheet 13. If the push button is pressed, the counter plate 14 is detached from the magnetic sheet 13 and closing of the contacts 23, 24 with the printed circuit 3. When the push button is released, the latter rises with an abrupt movement ensuring an abrupt rupture of the contact.
  • the barrel 9 while guiding the piston 6 makes it possible to obtain a seal against the run-off of a liquid on the top of the cover 11.
  • the fixing by overmolding of the contact piece 15 and the counter-plate 14 on the piston 6 of the button ensures perfect retention of the contact springs and a guarantee of good establishment of the electrical contact.
  • the clipping of the button head 2 on the piston of the button ensures both a good fixing of these elements as well as a possibility of interchanging the button heads.
  • FIG. 7 illustrates the process for overmolding the blades of contact on the push-button piston by means of a two-part mold 25, 26, as shown, which ensures, during the molding of the piston, the overmolding of the counterplate 14 and of the contact piece 15.
  • the metal counter plates 14 and the contact pieces 15 are presented in the form of continuous strips between the two half-shells 25, 26 of the mold.
  • the lower half-shell 26 has a housing in the shape of the contact piece 15, having a central stud 27 for the central hole 50 of the contact piece 15 and two lateral passages 28, 29 for receiving the two lateral branches 16 respectively. , 17 of the contact part. These lateral corridors have their inclined bottom so as to allow the bending of the lateral branches 16, 17 of the contact part when the mold is closed.
  • the upper half-shell 25 ′ has the complementary shape.
  • the lower half-shell 26 also has six punches 31 for fixing the contact piece 15, so that the metal counter plate 14 and the contact piece 15 are in perfect contact with one another.
  • the upper half-shell 25 comprises a vertical housing 32, in which the button piston 6 is molded, and two pins 33 for guiding the parts. These two pins 33 pass through holes 34 in the strip of counter plates, then through holes 35 in the strip of contact pieces, then slide in two lateral grooves 36 in the lower half-shell 26 so as to position these four elements one above the other.
  • the third phase consists of injecting plastic material into the mold. Once this material has cooled sufficiently, after demolding and cutting the counter-plates and contact parts at their intermediate connections in the strips, a push button assembled with its counter-plate and its contact part is obtained.
  • a cavity 32 by means of the stud 27 is formed at the base of the piston so as to allow it to be grasped and moved in the transfer chain, during the assembly operation of the control keyboard.
  • the counterplate 14 with two lugs 39 on which the corners 41 of the contact piece will be folded down to reinforce the fixing of these pieces to one another.
  • the plastic material includes these pins which ensures good support after cooling.
  • the invention applies to any keyboard with push-buttons for electric or electronic machines. It also applies to an isolated push button, the keyboard then comprising only one pair of contacts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Push-Button Switches (AREA)
  • Manufacture Of Switches (AREA)
EP81101212A 1980-02-27 1981-02-20 Druckknopf für ein Steuertastenfeld und Verfahren zur Herstellung eines solchen Druckknopfes Expired EP0035189B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8004307 1980-02-27
FR8004307A FR2476900A1 (fr) 1980-02-27 1980-02-27 Bouton-poussoir pour clavier de commande et procede de realisation

Publications (2)

Publication Number Publication Date
EP0035189A1 true EP0035189A1 (de) 1981-09-09
EP0035189B1 EP0035189B1 (de) 1984-07-04

Family

ID=9239038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101212A Expired EP0035189B1 (de) 1980-02-27 1981-02-20 Druckknopf für ein Steuertastenfeld und Verfahren zur Herstellung eines solchen Druckknopfes

Country Status (5)

Country Link
EP (1) EP0035189B1 (de)
JP (1) JPS56136417A (de)
DE (1) DE3164499D1 (de)
ES (1) ES8206086A1 (de)
FR (1) FR2476900A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544545A1 (fr) * 1983-04-18 1984-10-19 Gerard Michel Clavier de commande de dispositifs electriques ou electroniques
EP0189132A2 (de) * 1985-01-22 1986-07-30 Lexmark International, Inc. Tastaturgerät mit Kontakten mit magnetischer Schnappbetätigung
GB2183916A (en) * 1985-11-13 1987-06-10 Devlin Electronics Limited Improvements relating to keypads
FR2602909A1 (fr) * 1986-08-14 1988-02-19 Schoeller & Co Elektrotech Procede pour la fabrication d'une disposition de contacteurs a touche et disposition de contacteurs a touche
US20120025935A1 (en) * 2010-07-30 2012-02-02 Hon Hai Precision Industry Co., Ltd. Magnetic switch apparatus
DE102017114189A1 (de) * 2017-06-27 2018-12-27 Cherry Gmbh Trägerelement für eine Tastatur, Tastatur und Verfahren zum Herstellen einer Tastatur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB926353A (en) * 1958-12-08 1963-05-15 Kooperativa Foerbundet Improvements in key mechanisms particularly for operating electrical contact means

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6815907A (de) * 1968-11-08 1970-05-12
FR2044038A5 (de) * 1969-05-05 1971-02-19 Crouzet & Cie
GB1326963A (en) * 1971-03-03 1973-08-15 Burgess Micro Switch Co Ltd Operating members for snapaction switches and a method of making said members
US3826885A (en) * 1972-06-23 1974-07-30 Wild Rover Corp Pushbutton switch having spider-shaped contact contact carrier
DE2313750A1 (de) * 1973-03-20 1974-10-03 Leo Dr Steipe Schalter oder druckkontakt mit energiespeicher und sprungstelle
US3942145A (en) * 1974-09-03 1976-03-02 Teletype Corporation Snap-action switch
US3934104A (en) * 1974-09-23 1976-01-20 Stout Glenn M Push-button switch
FR2395546A2 (fr) * 1977-06-22 1979-01-19 Serras Paulet Edouard Clavier de commande alphanumerique a touches enfoncables pour machine electrique ou electronique
JPS5256377A (en) * 1976-11-06 1977-05-09 Matsushita Electric Ind Co Ltd Method of manufacturing push type switch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB926353A (en) * 1958-12-08 1963-05-15 Kooperativa Foerbundet Improvements in key mechanisms particularly for operating electrical contact means

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544545A1 (fr) * 1983-04-18 1984-10-19 Gerard Michel Clavier de commande de dispositifs electriques ou electroniques
EP0189132A2 (de) * 1985-01-22 1986-07-30 Lexmark International, Inc. Tastaturgerät mit Kontakten mit magnetischer Schnappbetätigung
EP0189132A3 (en) * 1985-01-22 1989-03-22 International Business Machines Corporation Magnetically snap actuated contact keyboard apparatus
GB2183916A (en) * 1985-11-13 1987-06-10 Devlin Electronics Limited Improvements relating to keypads
GB2183916B (en) * 1985-11-13 1990-02-07 Devlin Electronics Limited Improvements relating to telephone keypads
FR2602909A1 (fr) * 1986-08-14 1988-02-19 Schoeller & Co Elektrotech Procede pour la fabrication d'une disposition de contacteurs a touche et disposition de contacteurs a touche
US20120025935A1 (en) * 2010-07-30 2012-02-02 Hon Hai Precision Industry Co., Ltd. Magnetic switch apparatus
DE102017114189A1 (de) * 2017-06-27 2018-12-27 Cherry Gmbh Trägerelement für eine Tastatur, Tastatur und Verfahren zum Herstellen einer Tastatur

Also Published As

Publication number Publication date
EP0035189B1 (de) 1984-07-04
JPS56136417A (en) 1981-10-24
FR2476900A1 (fr) 1981-08-28
ES499831A0 (es) 1982-06-16
DE3164499D1 (en) 1984-08-09
FR2476900B1 (de) 1982-06-25
ES8206086A1 (es) 1982-06-16

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