EP0110094A1 - Bouton poussoir pour la fermeture de contacts électriques - Google Patents

Bouton poussoir pour la fermeture de contacts électriques Download PDF

Info

Publication number
EP0110094A1
EP0110094A1 EP83110388A EP83110388A EP0110094A1 EP 0110094 A1 EP0110094 A1 EP 0110094A1 EP 83110388 A EP83110388 A EP 83110388A EP 83110388 A EP83110388 A EP 83110388A EP 0110094 A1 EP0110094 A1 EP 0110094A1
Authority
EP
European Patent Office
Prior art keywords
circuit board
key
housing
printed circuit
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Withdrawn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
EP83110388A
Other languages
German (de)
English (en)
Inventor
Alfred Dätzl
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.)
Wilhelm Ruf KG
Original Assignee
Wilhelm Ruf KG
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 Wilhelm Ruf KG filed Critical Wilhelm Ruf KG
Publication of EP0110094A1 publication Critical patent/EP0110094A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • H01H2215/00—Tactile feedback
    • H01H2215/004—Collapsible dome or bubble
    • H01H2215/012—Positioning of individual dome
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/054—Mounting of key housings on same printed circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/042—Snap coupling; Snap mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2233/00—Key modules
    • H01H2233/03—Key modules mounted on support plate or frame
    • H01H2233/034—Snap coupling

Definitions

  • the invention relates to a key for closing electrical contacts with a push rod, which is displaceably mounted within a key housing, by pressing which the electrical contact is closed, and to a keyboard formed from a plurality of such keys.
  • the present invention has for its object to provide a key or a keyboard that can be assembled in the simplest way and, if necessary, also dismantled again.
  • the key housing simply has to be plugged onto the printed circuit board in order to form a finished key. After the contact surfaces have all been arranged on the side of the circuit board which serves as the carrier plate and faces the button housing, there is no need to solder the contacts from the other side of the circuit board.
  • the conductor tracks and contact areas can be applied to carrier foils or the like, which are arranged between the key housing and the printed circuit board. According to an advantageous feature of the invention, however, the conductor tracks and the contact areas are preferably applied directly on one side of the circuit board.
  • an additional switching contact surface is provided, which is arranged at a distance from the two contact surfaces and can be brought into contact with them by pressing the push-button plunger in order to produce the electrical contact.
  • the additional switching contact surface is formed on a switching contact carrier part which rests on the printed circuit board and is held between the button housing and the printed circuit board when the push button housing is attached and locked.
  • the switch contact carrier part expediently has a flat base part and an upwardly curved switch dome, which carries the switch contact surface on its upper inner surface, the switch dome being arranged within the button housing and the base part being clamped between the button housing and the printed circuit board.
  • the switch contact carrier part only has to be placed on the circuit board to assemble the button and the button housing then has to be plugged onto the circuit board, the switch contact carrier part being automatically held in its desired position.
  • the assembly of the button is further simplified if, according to a further feature of the invention, the push button plunger can be inserted into the button housing from the side facing away from the printed circuit board.
  • an effective stop device is provided between the key housing and the push rod, which prevents the push rod from falling out of the push button housing when the push rod is inserted into the push button housing.
  • the feeler plunger can have at least one leg resilient transversely to the actuation direction of the feeler plunger, the lower end of which has an outwardly projecting nose which interacts with a stop surface formed on the button housing. In order to facilitate the insertion of the push rod into the push button housing, it can also be advantageous if the lower, outer end of the leg is beveled.
  • the button housing has resilient holding legs transverse to the actuating direction of the push button plunger, the free ends of which are provided with holding lugs on the other side of the Grasp the circuit board and hold the housing on the circuit board.
  • the resilient retaining legs can have bevels at their lower ends, so that when the button housing is plugged onto the circuit board, the retaining legs are pressed resiliently to the side by running up the chamfers on one side wall of the circuit board until the retaining lugs snap under the other side of the circuit board .
  • the button according to the invention is thus characterized by the simplest construction and extremely problem-free assembly.
  • the button consists of only four parts, namely the circuit board serving as the carrier plate, the switch contact carrier part, the button housing and the push button plunger.
  • the switch contact carrier part is placed on the circuit board, then the button housing is printed on the circuit board with the switch contact carrier part until the retaining legs snap into the back of the carrier plate, and finally the switch plunger is pressed into the button housing until the Snap the noses of the resilient legs behind the stop surface of the key housing. It is also particularly advantageous that the assembly can always be carried out from the same side of the carrier plate.
  • the keys according to the invention can be used in conjunction with a keyboard, in which case a common circuit board is provided for all keys, which has a plurality of openings in the grid of the keyboard, via which the keys can be plugged onto the circuit board.
  • the keys are arranged in one or more rows
  • the keys Housing have two opposite support legs
  • the key housings are arranged on the circuit board so that the support legs of two along a row of adjacent key housings face each other, with mutually facing support legs through each: a single opening in the circuit board.
  • the switch contact surfaces are formed on at least one carrier mat, the switch contact surface carrier mats having openings whose grid corresponds to the grid of the openings in the printed circuit board, the openings of the carrier mat lying above the openings in the printed circuit board.
  • the keyboard according to the invention is advantageously composed of a minimum of parts and can be assembled in the simplest way.
  • the carrier plate that gives the keyboard mechanical stability also carries the electrical wiring pattern and the contact surfaces.
  • the switch contact surface support mats only have to be placed on the circuit board in such a way that their two openings lie one above the other. Then the individual key housings are plugged onto the carrier plate, as a result of which the switch contact surface carrier mats are fixed in their position, and finally only the key plungers are still pressed into the key housing in the manner described above. Again, assembly can only be done from one side of the circuit board.
  • the individual keys of the keyboard can be released from the printed circuit board in the simplest way, for example by compressing the holding legs, attached to another location on the keyboard, or used in another way.
  • the keyboard according to the invention is therefore extremely versatile, universally applicable and offers great possibilities for variation.
  • the individual keys can easily be used again, for example, in the event of a defective printed circuit board.
  • the reference numeral 1 denotes a relatively rigid, rigid circuit board, which serves as a carrier plate for the button parts fastened thereon.
  • the circuit board 1 is electrically insulating and has on its upper side 2 a plurality of electrically conductive conductor tracks (not shown), which have contact surfaces 3, 4 applied to the circuit board 1, of which only a single pair in FIG. 1 is shown, are electrically connected.
  • the contact surfaces 3; 4 are arranged on the circuit board 1 in a certain grid, with each contact surface pair 3, 4 being assigned a key 5.
  • a switch contact surface 7 is pressed down until it rests on the contact surfaces 3, 4 and bridges these two contact surfaces to establish electrical contact between the contact surfaces 3, 4.
  • a switch contact surface 7 is pressed down until it rests on the contact surfaces 3, 4 and bridges these two contact surfaces to establish electrical contact between the contact surfaces 3, 4.
  • several, for example four, electrically separate contact surfaces can also be provided in the switching region of one switching contact surface.
  • a switch contact surface support mat 8 is arranged, which can in particular consist of silicone and is electrically insulating.
  • the switch contact surface carrier mat 8 consists of a flat, flat base part 9, which rests on the top 2 of the printed circuit board 1, and a plurality of switch domes 10, which are designed like suction cups, which are open at the bottom and are provided with the electrically conductive switch contact surface 7 on their upper inside are.
  • the switching dome 10 is provided with an upper lifting element 11, the base part 9, the switching dome 10 and the overstroke element 11 being formed in one piece.
  • the switching dome 10 together with the upper lifting element 11 is arranged on the circuit board 1 in such a way that the switching contact surface 7 lies opposite the contact surface pair 3, 4.
  • the circuit board 1 has a plurality of openings 12, with each key 5 being assigned two openings 12.
  • the openings 12 are arranged on the printed circuit board 1 at regular intervals, which correspond to the grid of the keyboard, the contact surface pairs 3, 4 being located approximately in the middle between two openings 12.
  • the switch contact surface carrier mats 8 likewise have openings 13 on their base part 9, the shape and the mutual spacing of which corresponds to the shape and the mutual spacing of the openings 12.
  • the carrier mat 8 is placed on the circuit board 1 so that the openings 12 and 13 are located one above the other.
  • a button housing 14 of essentially rectangular cross section is placed on the circuit board 1 above each pair of contact surfaces 3, 4 or above each switching dome 10.
  • the button housing 14 is open on its underside facing the printed circuit board 1.
  • a guide shaft 16 with a rectangular cross section is formed on the ceiling 15 of the key housing 14, the cross-sectional area of which is smaller than the cross-sectional area of the lower region of the key housing 14.
  • the two side walls of the key housing 14 lying parallel to the plane of the drawing are supported on the upper side 2 of the printed circuit board 1.
  • the two side walls of the key housing 14, which are perpendicular to the plane of the drawing, are designed as holding legs 17 which are molded onto the key housing 14 at their upper region, but are otherwise not connected to the key housing, so that, due to the elasticity of the plastic material of the key housing 14 or the holding legs 17 a resilient deformation of the holding legs 17, in particular their lower ends, is possible transversely to the direction of arrow A.
  • the holding legs 17 each extend through an opening 12 and serve to hold the key housing 14 on the printed circuit board 1. For this purpose, they are longer than the side walls of the key housing 14 lying parallel to the plane of the drawing and each point inwards at their lower ends directed retaining lug 18, which engage on the lower side 19 of the circuit board 1 and thereby hold or lock the button housing 14 on the circuit board 1.
  • the inner, mutually facing side surfaces of the retaining lugs 18 have bevels 20, which have the effect that, when the button housing 14 is plugged onto the printed circuit board 1, the holding legs 17 are automatically pushed apart by the interaction of the bevels 20 with the inner sides of the openings 12 to be facing one another until the button housing 14 is complete is placed on the circuit board, ie until they parallel to the drawing level.
  • the push rod 6 comprises a guide part 21 of essentially rectangular cross section, the outer dimensions of which are adapted to the inner cross section of the guide shaft 16 of the push button housing 14, so that the push rod 6 is displaceably mounted in the push button housing 14 in the direction of arrow A.
  • the tappet 6 At its upper end, the tappet 6 carries a widened head 22, the lower side of which forms a lower stop for the tappet 6 by interaction with the upper end of the guide shaft 16.
  • a transparent plastic cap can be placed on the head 22 of the tappet 6, the upper side of which can be provided with a tactile recess in an ergonomically advantageous manner, with a labeled or inscribable leaflet can be inserted, which serves to identify or designate the button.
  • the top of the head 22 itself can serve as a tactile surface, in which case it preferably has a tactile depression itself.
  • the two side walls of the push button plunger 6, which are parallel to the plane of the drawing, are also essentially rigid in the case of the push button 6, while the side walls perpendicular to this are formed in their lower regions as resilient legs 23, which are arranged on their upper part Are molded on the area of the push rod and due to the elasticity of the plastic material of the push rod are resilient at least in their lower region transverse to direction A.
  • the two legs 23 each have at their lower ends an outwardly projecting nose 24 which interacts with the lower inner edge 25 of the ceiling 15 of the key housing 14, so that the upper stop of the push rod 6 is thereby defined.
  • the outer sides of the lugs 24 facing away from one another have bevels 26 which cause the legs 23 to be compressed when the push-button plunger is inserted into the push-button housing.
  • the legs 23 snap outwards into the position shown in FIG. 1, as a result of which the push rod is held securely on the push button housing 4.
  • a stop surface 27 Arranged in the interior of the push rod 6 is a stop surface 27 which is fixedly connected to the push rod 6 and which is connected to the upper end of the upper lifting element 11 cooperates. Due to the elasticity of the upper stroke element 11 or the switching dome 10, the push rod 6 is shown in FIG. 1.
  • buttons are applied to the printed circuit board 1 in the desired key pattern.
  • a separate switch contact surface support mat 8 is provided for each row of buttons.
  • the lateral projections 28 of the carrier mat 8 serve for more precise positioning and holding of the key mat 8 and correspond in their shape to corresponding recesses on the lower edge of the side walls of the key housing, not shown, which lie parallel to the drawing plane according to FIG. 1.
  • the above-described keyboard is assembled in a very simple manner: First, the switching contact surface carrier mat 8 (or several thereof) is placed on the printed circuit board 1 such that the openings 13 match the openings 12. The individual key housings 14 are then pressed into their respective desired positions. Finally, the push button 2 is pressed into the guide shaft 16 of the button housing 14.
  • buttons are also very easy. For this purpose, only the push rod 6 has to be pulled out of the push button housing while overcoming the latching force of the legs 23 or the lugs 24 and the holding legs 17 have to be spread outwards from the back of the printed circuit board 1 so that the push button housing 14 is lifted upwards can. Of course, you can also proceed in reverse order.

Landscapes

  • Push-Button Switches (AREA)
EP83110388A 1982-11-05 1983-10-18 Bouton poussoir pour la fermeture de contacts électriques Withdrawn EP0110094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3240940 1982-11-05
DE19823240940 DE3240940A1 (de) 1982-11-05 1982-11-05 Taste zum schliessen elektrischer kontakte

Publications (1)

Publication Number Publication Date
EP0110094A1 true EP0110094A1 (fr) 1984-06-13

Family

ID=6177401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110388A Withdrawn EP0110094A1 (fr) 1982-11-05 1983-10-18 Bouton poussoir pour la fermeture de contacts électriques

Country Status (2)

Country Link
EP (1) EP0110094A1 (fr)
DE (1) DE3240940A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0461529A3 (en) * 1990-06-11 1992-08-05 Fujitsu Limited Push switch with improved actuator assembly
GB2264393A (en) * 1992-02-22 1993-08-25 Mckechnie Uk Ltd Keyboard
GB2271023A (en) * 1992-09-24 1994-03-30 Txc Corp Direction controller for a video game.
FR2803084A1 (fr) * 1999-12-27 2001-06-29 Itt Mfg Entpr S Inc Commutateur electrique a effet tactile fixe par emboitement elastique sur une plaque a circuits
WO2008009243A1 (fr) * 2006-07-17 2008-01-24 Siemens Aktiengesellschaft Poussoir servant à actionner un élément de commutation
EP1837888A3 (fr) * 2006-03-22 2009-03-25 TRW Automotive Electronics & Components GmbH & Co. KG Module de commutateur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4307613C2 (de) * 1993-03-06 1996-03-28 Deutsche Telephonwerk Kabel Anordnung für Tastaturen von Kommunikations-Endgeräten
DE19541380A1 (de) * 1995-11-07 1997-05-15 Teves Gmbh Alfred Schalter mit auf die Leiterplatte aufgerasteten Schaltmodulen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900712A (en) * 1973-02-23 1975-08-19 Brother Ind Ltd Keyboard switch arrangement
US3917917A (en) * 1973-08-23 1975-11-04 Alps Electric Co Ltd Keyboard pushbutton switch assembly having multilayer contact and circuit structure
GB2046996A (en) * 1979-04-11 1980-11-19 Electronic Components Ltd Electrical switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900712A (en) * 1973-02-23 1975-08-19 Brother Ind Ltd Keyboard switch arrangement
US3917917A (en) * 1973-08-23 1975-11-04 Alps Electric Co Ltd Keyboard pushbutton switch assembly having multilayer contact and circuit structure
GB2046996A (en) * 1979-04-11 1980-11-19 Electronic Components Ltd Electrical switch

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0461529A3 (en) * 1990-06-11 1992-08-05 Fujitsu Limited Push switch with improved actuator assembly
GB2264393A (en) * 1992-02-22 1993-08-25 Mckechnie Uk Ltd Keyboard
EP0558239A1 (fr) * 1992-02-22 1993-09-01 McKechnie UK Limited Commutateur à bouton-poussoirs
GB2271023A (en) * 1992-09-24 1994-03-30 Txc Corp Direction controller for a video game.
FR2803084A1 (fr) * 1999-12-27 2001-06-29 Itt Mfg Entpr S Inc Commutateur electrique a effet tactile fixe par emboitement elastique sur une plaque a circuits
WO2001048770A1 (fr) * 1999-12-27 2001-07-05 Itt Manufacturing Enterprises Inc. Commutateur electrique individuel etanche fixe par emboîtement sur une plaque a circuits
US6501036B2 (en) 1999-12-27 2002-12-31 Itt Manufacturing Enterprises, Inc. Sealed board-mounted electrical switch
EP1837888A3 (fr) * 2006-03-22 2009-03-25 TRW Automotive Electronics & Components GmbH & Co. KG Module de commutateur
US7638724B2 (en) 2006-03-22 2009-12-29 Trw Automotive Electronics & Components Gmbh & Co. Kg Switch module
WO2008009243A1 (fr) * 2006-07-17 2008-01-24 Siemens Aktiengesellschaft Poussoir servant à actionner un élément de commutation
CN101438362B (zh) * 2006-07-17 2013-02-20 西门子公司 用于操纵开关元件的挺杆

Also Published As

Publication number Publication date
DE3240940A1 (de) 1984-05-10

Similar Documents

Publication Publication Date Title
DE2235860C3 (de) Steuergerät mit mindestens einer elektrischen Kontaktsteuervorrichtung
DE3019886A1 (de) Fluessigkeits- und gasdichter schiebeschalter
DE8302660U1 (de) Tastenanordnung zur Auslösung von bestimmten Symbolen der Tastenoberfläche jeweils zugeordneten Schaltfunktionen oder Schaltsignalen.
EP0163874A2 (fr) Commutateur à touche
DE60101520T2 (de) Tastschalter mit Tastenkopf welcher auf- und abbewegbar ist und Verfahren zu seiner Herstellung
DE2515185B2 (de) Elektrischer Schnappschalter
DE2301853C3 (de) Tastschalter
EP0110094A1 (fr) Bouton poussoir pour la fermeture de contacts électriques
DE2943855A1 (de) Drucktaste
DE2951327A1 (de) Hermetisch dichte schaltervorrichtung
DE2531841C3 (de) Elektrischer Schnappschalter
DE3941712A1 (de) Drucktastenanordnung
DE2705756C2 (de) Druckknopfschalter für elektronische Tischrechner o.dgl.
DE2524287A1 (de) Elektrischer schalter
DE2950665A1 (de) Tastwahlblock fuer fernsprechgeraete
CH652269A5 (en) Quick mounting base made of plastic, for fixing an electrical device or printed-circuit board
DE2516527A1 (de) Aus einzelnen leuchttastern zusammengesetzte tastatur
EP0678885A1 (fr) Touche électrique
DE29820853U1 (de) Tastenkappe
DE2826262A1 (de) Tastenbrett mit drucktasten zur alphanumerischen steuerung fuer eine elektrische oder elektronische maschine
DE19836793C2 (de) Bedienelement zum selektiven Herstellen elektrischer Kontakte
DE2730659C2 (de) Tastschalter
DE2462035C3 (de) Tastatur
DE2830661C2 (de) Schalteinrichtung für elektrische Geräte
DE3107440A1 (de) Elektrischer schalter, insbesondere zur anordnung im schalthebelende eines lenkstockschalters

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19840607

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DAETZL, ALFRED