EP0134509A2 - Push button - Google Patents

Push button Download PDF

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Publication number
EP0134509A2
EP0134509A2 EP84108321A EP84108321A EP0134509A2 EP 0134509 A2 EP0134509 A2 EP 0134509A2 EP 84108321 A EP84108321 A EP 84108321A EP 84108321 A EP84108321 A EP 84108321A EP 0134509 A2 EP0134509 A2 EP 0134509A2
Authority
EP
European Patent Office
Prior art keywords
push button
movable
button according
scissors
immovable
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
EP84108321A
Other languages
German (de)
French (fr)
Other versions
EP0134509A3 (en
EP0134509B1 (en
Inventor
Jürgen Dipl.-Ing. Oelsch
Bertold Stürmer
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.)
Preh GmbH
Original Assignee
Preh 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 Preh GmbH filed Critical Preh GmbH
Priority to AT84108321T priority Critical patent/ATE47249T1/en
Publication of EP0134509A2 publication Critical patent/EP0134509A2/en
Publication of EP0134509A3 publication Critical patent/EP0134509A3/en
Application granted granted Critical
Publication of EP0134509B1 publication Critical patent/EP0134509B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/12—Push-buttons
    • H01H3/122—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor
    • H01H3/125—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor using a scissor mechanism as stabiliser

Definitions

  • the invention relates to a push button with an actuating surface on a movable key part, which is large compared to an electrical contact to be actuated, and with a guide device which guides the movable key part against an immovable key part, the guide device on the one hand on the movable and on the other is articulated to the immovable key part and the guide device transmits an actuating force exerted on an edge region of the actuating surface to an opposite edge region of the movable key part.
  • Such a push button is, for example, the "space bar" of a keyboard.
  • the guide device is formed by a swivel bracket which is articulated on the two button ends. When actuated at one end of the key, it takes the other end of the key with it, so that the switching of the electrical contact is largely independent of the location of the actuation of the key.
  • large-area keys are often provided in addition to the key mentioned, which cover an area which is a multiple of the predominant key size. With such buttons, it must be ensured that when the button is pressed, the assigned switch contact is always actuated in the same way, regardless of which button position is pressed. The button must not tend to jam.
  • Pushbuttons of the type mentioned at the outset often do not have their own resetting spring elements. They are often brought into their starting position by a restoring force, which also replaces the associated electrical contact. For example, rubber membranes are provided for this. In the case of large-area keys of the type mentioned, it must be ensured that the pushbutton safely returns to its starting position even if no own return spring is provided and the restoring force of the contact arrangement is small and does not attack the key at a central point.
  • the object of the invention is to propose a push button of the type mentioned, in which there is no risk of jamming or jamming, neither when actuating nor when resetting, even if the button is large in length and width compared to the contact to be actuated or the other buttons a keyboard.
  • the above object is achieved in that the guide device is formed by two scissors, the two arms of each scissor being rotatably connected on one axis, in that the two axes are kept in alignment with one another, in that the upper free ends of the four scissor arms are in four bearing positions of the movable button part are held in the actuating direction and are movable transversely thereto, the four bearing points including a rectangular area which largely coincides with the actuating area, and that the lower free ends of the four scissor arms are held on the immovable button part in the actuating direction and are movable transversely thereto.
  • the guide device formed by the double scissors ensures that when the button is pressed off-center, the other areas are taken parallel, so that the button does not tilt.
  • the switching behavior of the contact is not influenced by the guide device.
  • the guide device also ensures that the restoring force emanating from the electrical contact the spaced bearings is transmitted so that the button goes into its initial position without great friction losses and does not jam.
  • the double scissors do not require a large overall height, so that the actuating surface of the push button according to the invention can have the same height as the other buttons and can also be arranged on the same contact plate as this.
  • the arms of the scissors are combined in pairs to form a frame.
  • the axis of one pair of scissors is preferably gripped by fingers of the other pair of scissors. This results in a simple, coherent structure of the two scissors.
  • a push button 1 has a movable button part 2 and an immovable button part 3. This is placed on a base plate 4 of a keyboard.
  • the base plate 4 has bores 5 in which spring-elastic switching bodies 6 are arranged. Below the holes 5 switching chambers 7 of a switching film 8 are arranged. The electrically conductive coverings are provided in the switching chamber 7, which contact each other when one of the switching bodies 6 is actuated.
  • the movable key part 2 consists of a carrier 9 and a key cap 10 placed thereon. As can be seen in FIGS. 1 and 6, the actuating area of the key cap 10 is large in comparison with the spring-elastic switching body 6. The switching bodies 6 are thus distributed on the base plate 4 that the square keys mainly provided on the keyboard are tight.
  • a guide device is provided between the immovable button part 3 and the carrier 9. This consists of two scissors 11 and 12. In FIG. 1, the scissors 12 lie in the plane of the drawing behind the scissors 11 and are aligned with them in the view according to FIG.
  • the scissors 11 has two arms 13 and 14 which are pivotally connected in their center about an axis 17. Accordingly, arms 15 and 16 of the scissors 12 are pivotable about an axis 18. The axes 17 and 18 are aligned and are kept aligned. Pins 19 and 20 are formed on the upper free ends of the arms 13 and 14. Pins 21 and 22 are formed on the lower free ends of the arms 13 and 14. Accordingly, pins 23, 24 and 25 and 26 are formed on the arms 15 and 16.
  • 3 guide pockets 21 ', 22', 25 'and 26' are formed on the immovable button part for receiving the pins 21, 22, 25 and 26. These allow the pins to be displaced in direction A, but not in actuation direction B or reset direction R.
  • a cavity 27 is formed, which is provided for receiving the switching body 6.
  • An opening 28 adjoins the cavity 27.
  • the key part 3 has a guide sleeve 29 which is provided on the outside with locking lugs 30.
  • 3 guide strips 31 are arranged on the button part. Pins 32 are used for attachment to the base plate 4 (see Figures 2 and 3).
  • the carrier 9 has support tongues 19 ', 20', 23 'and 24' for the pins 19, 20 and 23 and 24.
  • a switching plunger 33 is formed, which fits through the opening 28 and protrudes into the cavity 27.
  • the carrier 9 has latching tongues 34 which are assigned to the latching lugs 30. Together with them, they limit the stroke of the support 9 relative to the button part 3.
  • a support 35 is also arranged on the support 9, which engages between the guide strips 31. With additional locking tongues 36 in addition to the strip 35 and corresponding locking lugs 37 on the outside of the guide strips 31, the stroke can be limited in addition to the locking pair 30, 34.
  • the carrier 9 has openings 38 for fixing the key cap 10 (cf. FIGS. 4 and 5).
  • Pins 39 which can be positively pressed into the openings 38, are formed on the underside of the key cap 10. It has a bolt 40 which engages through the carrier 9 into the guide sleeve 29.
  • 10 approaches 41 are distributed on the outer edge of the key cap, which hit the outer edge of the immovable key part 3 when the key 1 is pressurized.
  • the pins 19, 20, 23 and 24 are held so that they are in the transverse direction A, but not in Actuation direction B or reset direction R can move. As can be seen in FIG.
  • these four bearing points of the pins 19, 20, 23 and 24 enclose a rectangular area which largely coincides with the actuating area (base area of the key cap 10).
  • the rectangle circumscribed by the bearing points coincides with the larger part of the L-shaped actuating surface of the key cap 10.
  • the rectangle that defines the bearing pockets 21 ', 22', 25 is just as large as the rectangle that describes the bearing positions mentioned ', 26' circumscribe the formed bearing points of the lower pins 21, 22, 25 and 26.
  • the double scissors 11, 12 are composed of two identical frame parts.
  • One of the frame parts 42 is shown in FIGS. 8 and 9.
  • the frame part 42 forms the arms 13 and 15. Accordingly, the pins 19, 21 and 23, 25 are formed on it.
  • An axle stub 18 ' is formed on the frame part 42 in the vicinity of the arm 15.
  • the center of the arm 13 is in the vicinity of the Axis 17 interrupted and ends there in two fingers 43 which form a bearing shell 44 with a diameter equal to the stub axle 18 '.
  • the fingers 43 of the frame part 42 encompass the stub axle 17 'of the other frame part, while its fingers enclose the stub axle 18'.
  • the double scissors 11, 12 are created from only two components, the axes 17, 18 being aligned at the same time and forcibly moving with one another.
  • the restoring force of the switching body 6 acts on the switching plunger 33. Although this is located completely outside the center of the button 1, the movable button part 2 is reset in parallel. The restoring movement acts primarily on the finger 19. However, its arm 13 pulls the arm 14 and the axis 18 and thus also the arms 15 and 16 along the axis 17.
  • the described double scissors 11, 12 are constructed as plastic parts.
  • the double scissors can also be formed from wire.

Abstract

An improved key for typing keyboards or other terminal keyboards, which is substantially larger than the other keys and large compared with the contact to be actuated. In order to avoid tilting during out-of-center pressing, two shears are provided as a guiding means between the mobile and the immobile key parts. The shears are comprised of two frame parts pivoted about axes which are held aligned flush with each other. The shear arms provide four support points at their top free ends which enclose a rectangular surface which is practically congruent with the touch surface.

Description

Die Erfindung betrifft eine Drucktaste mit einer Betätigungsfläche an einem beweglichen Tastenteil, die groß im Vergleich zu einem zu betätigenden elektrischen Kontakt ist, und mit einer Führungseinrichtung, die das bewegliche Tastenteil gegenüber einem unbeweglichen Tastenteil führt, wobei die Führungseinrichtung einerseits an dem beweglichen und andererseits an dem unbeweglichen Tastenteil angelenkt ist und die Führungseinrichtung eine auf einen Randbereich der Betätigungsfläche ausgeübte Betätigungskraft auf einen gegenüberliegenden Randbereich des beweglichen Tastenteils überträgt.The invention relates to a push button with an actuating surface on a movable key part, which is large compared to an electrical contact to be actuated, and with a guide device which guides the movable key part against an immovable key part, the guide device on the one hand on the movable and on the other is articulated to the immovable key part and the guide device transmits an actuating force exerted on an edge region of the actuating surface to an opposite edge region of the movable key part.

Eine derartige Drucktaste ist beispielsweise die "Leertaste" einer Schreibtastatur. Bei einer solchen zwar schmalen jedoch langen Taste ist die Führungseinrichtung von einem Schwenkbügel gebildet, der an den beiden Tastenenden angelenkt ist. Bei einer Betätigung am einen Tastenende nimmt er das andere Tastenende mit, so daß das Schalten des elektrischen Kontakts weitgehend unabhängig von dem Ort der Betätigung der Taste ist. Bei Schreibtastaturen bzw. Ein- und Ausgabetastaturen von Terminals sind häufig neben der genannten Taste auch großflächige Tasten vorgesehen, die eine Fläche überdecken, die das Mehrfache der überwiegenden Tastengröße ist. Bei solchen Tasten muß sichergestellt sein, daß beim Drücken der Taste der zugeordnete Schaltkontakt immer in gleicher Weise betätigt wird, ganz unabhängig davon, auf welche Tastenstelle gedrückt wird. Dabei darf die Taste nicht zum Klemmen neigen.Such a push button is, for example, the "space bar" of a keyboard. With such a narrow but long button, the guide device is formed by a swivel bracket which is articulated on the two button ends. When actuated at one end of the key, it takes the other end of the key with it, so that the switching of the electrical contact is largely independent of the location of the actuation of the key. In the case of writing keyboards or input and output keyboards of terminals, large-area keys are often provided in addition to the key mentioned, which cover an area which is a multiple of the predominant key size. With such buttons, it must be ensured that when the button is pressed, the assigned switch contact is always actuated in the same way, regardless of which button position is pressed. The button must not tend to jam.

Drucktasten der eingangs genannten Art weisen häufig keine eigenen rückstellenden Federelemente auf. Sie werden oft durch eine Rückstellkraft in ihre Ausgangsstellung gebracht, die auch den zugehörigen elektrischen Kontakt ersetzt. Beispielsweise sind hierfür Gummimembranen vorgesehen. Bei großflächigen Tasten der genannten Art muß sichergestellt sein, daß die Drucktaste auch dann sicher in ihre Ausgangsstellung zurückgeht, wenn keine eigene Rückstellfeder vorgesehen ist und die Rückstellkraft der Kontaktanordnung klein ist und nicht an einer zentralen Stelle der Taste angreift. Aufgabe der Erfindung ist es, eine Drucktaste der eingangs genannten Art vorzuschlagen, bei der weder beim Betätigen noch beim Rückstellen die Gefahr eines Verkantens bzw. Verklemmens besteht, auch wenn die Taste nach Länge und Breite groß gegenüber dem zu betätigenden Kontakt bzw. den übrigen Tasten einer Tastatur ist.Pushbuttons of the type mentioned at the outset often do not have their own resetting spring elements. They are often brought into their starting position by a restoring force, which also replaces the associated electrical contact. For example, rubber membranes are provided for this. In the case of large-area keys of the type mentioned, it must be ensured that the pushbutton safely returns to its starting position even if no own return spring is provided and the restoring force of the contact arrangement is small and does not attack the key at a central point. The object of the invention is to propose a push button of the type mentioned, in which there is no risk of jamming or jamming, neither when actuating nor when resetting, even if the button is large in length and width compared to the contact to be actuated or the other buttons a keyboard.

Erfindungsgemäß ist obige Aufgabe dadurch gelöst, daß die Führungseinrichtung von zwei Scheren gebildet ist, wobei die beiden Arme jeder Schere an einer Achse drehbar verbunden sind, daß die beiden Achsen zueinander fluchtend ausgerichtet gehalten sind, daß die oberen freien Enden der vier Scherenarme an vier Lagerstellen des beweglichen Tastenteils in Betätigungsrichtung gehalten und quer dazu beweglich sind, wobei die vier Lagerstellen eine Rechteckfläche einschließen, die sich mit der Betätigungsfläche weitgehend deckt, und daß die unteren freien Enden der vier Scherenarme an dem unbeweglichen Tastenteil in Betätigungsrichtung gehalten und quer dazu beweglich sind.According to the invention, the above object is achieved in that the guide device is formed by two scissors, the two arms of each scissor being rotatably connected on one axis, in that the two axes are kept in alignment with one another, in that the upper free ends of the four scissor arms are in four bearing positions of the movable button part are held in the actuating direction and are movable transversely thereto, the four bearing points including a rectangular area which largely coincides with the actuating area, and that the lower free ends of the four scissor arms are held on the immovable button part in the actuating direction and are movable transversely thereto.

Die von der Doppelschere gebildete Führungseinrichtung stellt sicher, daß dann, wenn die Taste außermittig gedrückt wird, die anderen Bereiche parallel mitgenommen werden, so daß also die Taste nicht verkantet. Das Schaltverhalten des Kontakts wird durch die Führungseinrichtung nicht beeinflußt.The guide device formed by the double scissors ensures that when the button is pressed off-center, the other areas are taken parallel, so that the button does not tilt. The switching behavior of the contact is not influenced by the guide device.

Die Führungseinrichtung stellt ferner sicher, daß die vom elektrischen Kontakt ausgehende Rückstellkraft auf die beabstandeten Lagerstellen übertragen wird, so daß die Taste ohne große Reibungsverluste in ihre Ausgangsstellung geht und auch dabei nicht klemmt.The guide device also ensures that the restoring force emanating from the electrical contact the spaced bearings is transmitted so that the button goes into its initial position without great friction losses and does not jam.

Ein weiterer Vorteil der erfindungsgemäßen Drucktaste ist darin zu sehen, daß die Toleranzen der Führungseinrichtung keinen wesentlichen Einfluß auf das Bewegungsverhalten haben, so daß zwischen den Teilen ein relativ großes Spiel zugelassen werden kann.Another advantage of the push button according to the invention can be seen in the fact that the tolerances of the guide device have no significant influence on the movement behavior, so that a relatively large amount of play can be permitted between the parts.

Schließlich ist günstig, daß die Doppelschere keine große Bauhöhe benötigt, so daß die Betätigungsfläche der erfindungsgemäßen Drucktaste die gleich Höhenlage wie die anderen Tasten haben kann und auch auf der gleichen Kontaktplatte wie diese angeordnet sein kann.Finally, it is favorable that the double scissors do not require a large overall height, so that the actuating surface of the push button according to the invention can have the same height as the other buttons and can also be arranged on the same contact plate as this.

In bevorzugter Ausgestaltung der Erfindung sind die Arme der Scheren paarweise zu Rahmen zusammengefaßt. Vorzugsweise ist dabei die Achse der einen Schere von Fingern der jeweils anderen Schere umgriffen. Dadurch ist ein einfacher zusammenhängender Aufbau der beiden Scheren erreicht.In a preferred embodiment of the invention, the arms of the scissors are combined in pairs to form a frame. The axis of one pair of scissors is preferably gripped by fingers of the other pair of scissors. This results in a simple, coherent structure of the two scissors.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus der folgenden Beschreibung eines Ausführungsbeispiels und den Unteransprüchen. In der Zeichnung zeigen:

  • Figur 1 eine schematische Schnittansicht einer Drucktaste einer Tastatur,
  • Figur 2 einen Schnitt des unbeweglichen Tastenteils längs der Linie II-II nach Figur 3,
  • Figur 3 eine Aufsicht des unbeweglichen Tastenteils,
  • Figur 4 eine Unteransicht des Trägers des beweglichen Tastenteils,
  • Figur 5 einen Schnitt des Trägers längs der Linie V-V nach Figur 4,
  • Figur 6 eine Unteransicht der Tastenkappe des beweglichen Tastenteils,
  • Figur 7 einen Schnitt längs der Linie VII-VII nach Figur 6,
  • Figur 8 das eine Rahmenteil der Doppelschere in Aufsicht und
  • Figur 9 dessen Ansicht längs der Linie IX-IX nach Figur 8.
Further advantageous refinements of the invention result from the following description of an exemplary embodiment and the subclaims. The drawing shows:
  • FIG. 1 shows a schematic sectional view of a pushbutton on a keyboard,
  • FIG. 2 shows a section of the immovable button part along the line II-II according to FIG. 3,
  • FIG. 3 shows a top view of the immovable button part,
  • FIG. 4 shows a bottom view of the carrier of the movable key part,
  • FIG. 5 shows a section of the carrier along the line VV according to FIG. 4,
  • FIG. 6 shows a bottom view of the key cap of the movable key part,
  • 7 shows a section along the line VII-VII according to FIG. 6,
  • Figure 8 is a frame part of the double scissors in supervision and
  • 9 whose view along the line IX-IX of FIG. 8.

Eine Drucktaste 1 weist ein bewegliches Tastenteil 2 und ein unbewegliches Tastenteil 3 auf. Dieses ist auf eine Grundplatte 4 einer Tastatur gesteckt. Die Grundplatte 4 weist Bohrungen 5 auf, in denen federelastische Schaltkörper 6 angeordnet sind. Unterhalb der Bohrungen 5 sind Schaltkammern 7 einer Schaltfolie 8 angeordnet. In der Schaltkammer 7 sind die elektrisch leitenden Beläge vorgesehen, die sich beim Betätigen eines der Schaltkörper 6 kontaktieren.A push button 1 has a movable button part 2 and an immovable button part 3. This is placed on a base plate 4 of a keyboard. The base plate 4 has bores 5 in which spring-elastic switching bodies 6 are arranged. Below the holes 5 switching chambers 7 of a switching film 8 are arranged. The electrically conductive coverings are provided in the switching chamber 7, which contact each other when one of the switching bodies 6 is actuated.

Das bewegliche Tastenteil 2 besteht aus einem Träger 9 und einer auf diesen aufgesetzten Tastenkappe 10. Wie den Figuren 1 und 6 zu entnehmen ist die Betätigungsfläche der Tastenkappe 10 groß im Vergleich zu dem federelastischen Schaltkörper 6. Die Schaltkörper 6 sind so auf der Grundplatte 4 verteilt, daß die an der Tastatur überwiegend vorgesehenen quadratischen Tasten dicht stehen..The movable key part 2 consists of a carrier 9 and a key cap 10 placed thereon. As can be seen in FIGS. 1 and 6, the actuating area of the key cap 10 is large in comparison with the spring-elastic switching body 6. The switching bodies 6 are thus distributed on the base plate 4 that the square keys mainly provided on the keyboard are tight.

Zwischen dem unbeweglichen Tastenteil 3 und dem Träger 9 ist eine Führungseinrichtung vorgesehen. Diese besteht aus zwei Scheren 11 und 12. In Figur 1 liegt die Schere 12 in der Zeichenebene hinter der Schere 11 und fluchtet in der Ansicht nach Figur 1 mit dieser.A guide device is provided between the immovable button part 3 and the carrier 9. This consists of two scissors 11 and 12. In FIG. 1, the scissors 12 lie in the plane of the drawing behind the scissors 11 and are aligned with them in the view according to FIG.

Die Schere 11 weist zwei Arme 13 und 14 auf, welche in ihrer Mitte um eine Achse 17 schwenkbar verbunden sind. Dementsprechend sind Arme 15 und 16 der Schere 12 um eine Achse 18 schwenkbar. Die Achsen 17 und 18 fluchten miteinander und sind ausgerichtet gehalten. An den oberen freien Enden der Arme 13 und 14 sind Zapfen 19 bzw. 20 ausgebildet. An den unteren freien Enden der Arme 13 und 14 sind Zapfen 21 und 22 ausgebildet. Dementsprechend sind an den Armen 15 und 16 Zapfen 23, 24 sowie 25 und 26 ausgebildet.The scissors 11 has two arms 13 and 14 which are pivotally connected in their center about an axis 17. Accordingly, arms 15 and 16 of the scissors 12 are pivotable about an axis 18. The axes 17 and 18 are aligned and are kept aligned. Pins 19 and 20 are formed on the upper free ends of the arms 13 and 14. Pins 21 and 22 are formed on the lower free ends of the arms 13 and 14. Accordingly, pins 23, 24 and 25 and 26 are formed on the arms 15 and 16.

Zur Aufnahme der Zapfen 21, 22, 25 und 26 sind an dem unbeweglichen Tastenteil 3 Führungstaschen 21', 22', 25' und 26' ausgebildet. Diese gestatten eine Verschiebung der Zapfen in der Richtung A, jedoch nicht in Betätigungsrichtung B bzw. Rückstellrichtung R.3 guide pockets 21 ', 22', 25 'and 26' are formed on the immovable button part for receiving the pins 21, 22, 25 and 26. These allow the pins to be displaced in direction A, but not in actuation direction B or reset direction R.

An dem unbeweglichen Tastenteil 3 ist eine Höhlung 27 ausgebildet, die zur Aufnahme des Schaltkörpers 6 vorgesehen ist. An die Höhlung 27 schließt sich eine Öffnung 28 an. Das Tastenteil 3 weist eine Führungshülse 29 auf, die außen mit Rastnasen 30 versehen ist. Außerdem sind am Tastenteil 3 Führungsleisten 31 angeordnet. Stifte 32 dienen zur Befestigung an der Grundplatte 4 (vgl.Figuren 2 und 3).On the immovable button part 3, a cavity 27 is formed, which is provided for receiving the switching body 6. An opening 28 adjoins the cavity 27. The key part 3 has a guide sleeve 29 which is provided on the outside with locking lugs 30. In addition, 3 guide strips 31 are arranged on the button part. Pins 32 are used for attachment to the base plate 4 (see Figures 2 and 3).

Der Träger 9 weist Auflagezungen 19', 20', 23' und 24' für die Zapfen 19, 20 sowie 23 und 24 auf. Am Träger 9 ist ein Schaltstößel 33 ausgebildet, der durch die Öffnung 28 paßt und in die Höhlung 27 ragt. Der Träger 9 weist Rastzungen 34 auf, die den Rastnasen 30 zugeordnet sind. Sie begrenzen zusammen mit ihnen den Hub des Trägers 9 gegenüber dem Tastenteil 3. Am Träger 9 ist außerdem eine Leiste 35 angeordnet, welche zwischen die Führungsleisten 31 greift. Mit weiteren Rastzungen 36 neben der Leiste 35 und entsprechenden Rastnasen 37 außen an den Führungsleisten 31 kann der Hub zusätzlich zur Rastpaarung 30, 34 begrenzt werden. Außerdem weist der Träger 9 Öffnungen 38 zur Festlegung der Tastenkappe 10 auf (vgl. Figur 4 bzw. 5).The carrier 9 has support tongues 19 ', 20', 23 'and 24' for the pins 19, 20 and 23 and 24. On the carrier 9, a switching plunger 33 is formed, which fits through the opening 28 and protrudes into the cavity 27. The carrier 9 has latching tongues 34 which are assigned to the latching lugs 30. Together with them, they limit the stroke of the support 9 relative to the button part 3. A support 35 is also arranged on the support 9, which engages between the guide strips 31. With additional locking tongues 36 in addition to the strip 35 and corresponding locking lugs 37 on the outside of the guide strips 31, the stroke can be limited in addition to the locking pair 30, 34. In addition, the carrier 9 has openings 38 for fixing the key cap 10 (cf. FIGS. 4 and 5).

An die Tastenkappe 10 sind an ihrer Unterseite Stifte 39 angeformt, die formschlüssig in die Öffnungen 38 eindrückbar sind. Sie weist einen Bolzen 40 auf, der durch den Träger 9 hindurch in die Führungshülse 29 greift. Außerdem sind am Außenrand der Tastenkappe 10 Ansätze 41 verteilt, die bei Druckbeaufschlagung der Taste 1 auf den Außenrand des unbeweglichen Tastenteils 3 auftreffen. Zwischen Leistenstücken 19", 20", 23" und 24" und den Auflagezungen 19', 20', 23' und 24' sind die Zapfen 19, 20, 23 und 24 so gehalten, daß sie sich in Querrichtung A, jedoch nicht in Betätigungsrichtung B oder Rückstellrichtung R bewegen können. Wie Figur 6 zu entnehmen schließen diese vier Lagerstellen der Zapfen 19, 20, 23 und 24 eine Rechteckfläche ein, die sich mit der Betätigungsfläche (Grundfläche der Tastenkappe 10) weitgehend deckt. Das von den Lagerstellen umschriebene Rechteck deckt sich mit dem größeren Teil der L-förmigen Betätigungsfläche der Tastenkappe 10. Ebenso groß wie das Rechteck, das die genannten Lagerstellen umschreiben, ist auch das Rechteck, das die von den Führungstaschen 21', 22', 25', 26' gebildeten Lagerstellen der unteren Zapfen 21, 22, 25 und 26 umschreiben.Pins 39, which can be positively pressed into the openings 38, are formed on the underside of the key cap 10. It has a bolt 40 which engages through the carrier 9 into the guide sleeve 29. In addition, 10 approaches 41 are distributed on the outer edge of the key cap, which hit the outer edge of the immovable key part 3 when the key 1 is pressurized. Between ledge pieces 19 ", 20", 23 "and 24" and the support tongues 19 ', 20', 23 'and 24', the pins 19, 20, 23 and 24 are held so that they are in the transverse direction A, but not in Actuation direction B or reset direction R can move. As can be seen in FIG. 6, these four bearing points of the pins 19, 20, 23 and 24 enclose a rectangular area which largely coincides with the actuating area (base area of the key cap 10). The rectangle circumscribed by the bearing points coincides with the larger part of the L-shaped actuating surface of the key cap 10. The rectangle that defines the bearing pockets 21 ', 22', 25 is just as large as the rectangle that describes the bearing positions mentioned ', 26' circumscribe the formed bearing points of the lower pins 21, 22, 25 and 26.

Die Doppelschere 11, 12 ist aus zwei identischen Rahmenteilen zusammengesetzt. Eines der Rahmenteile 42 ist in den Figuren 8 und 9 gezeigt. Das Rahmenteil 42 bildet die Arme 13 und 15. Dementsprechend sind an ihm die Zapfen 19, 21 und 23, 25 ausgebildet. Am Rahmenteil 42 ist in der Nähe des Armes 15 ein Achsstummel 18' ausgeformt. Die Mitte des Armes 13 ist in der Umgebung der Achse 17 unterbrochen und endet dort in zwei Fingern 43, die eine Lagerschale 44 mit einem dem Achsstummel 18' gleichen Durchmesser bilden. Zur Montage der Doppelschere 11, 12 wird ein dem Rahmenteil 42 gleiches Rahmenteil um 180° diesem gegenüber versetzt in jenes eingeschnappt. Dabei umgreifen die Finger 43 des Rahmenteils 42 den Achsstummel 17' des anderen Rahmenteils, wogegen dessen Finger den Achsstummel 18' umschließen. Dadurch ist die Doppelschere 11, 12 aus nur zwei Bauteilen geschaffen, wobei gleichzeitig die Achsen 17, 18 ausgerichtet sind und sich zwangsweise miteinander bewegen.The double scissors 11, 12 are composed of two identical frame parts. One of the frame parts 42 is shown in FIGS. 8 and 9. The frame part 42 forms the arms 13 and 15. Accordingly, the pins 19, 21 and 23, 25 are formed on it. An axle stub 18 'is formed on the frame part 42 in the vicinity of the arm 15. The center of the arm 13 is in the vicinity of the Axis 17 interrupted and ends there in two fingers 43 which form a bearing shell 44 with a diameter equal to the stub axle 18 '. To assemble the double scissors 11, 12, a frame part which is the same as the frame part 42 is snapped into it by 180 ° offset from it. The fingers 43 of the frame part 42 encompass the stub axle 17 'of the other frame part, while its fingers enclose the stub axle 18'. As a result, the double scissors 11, 12 are created from only two components, the axes 17, 18 being aligned at the same time and forcibly moving with one another.

Die Funktionsweise der beschriebenen Drucktaste ist etwa folgende:

  • Wird in einem Eckbereich in Betätigungsrichtung B auf die Tastenkappe 10 gedrückt, dann hat der der Druckstelle nächstliegende Zapfen die Tendenz nach unten zu gehen. Dabei wird der zugehörige Arm verschwenkt, wodurch sich dessen Achse, beispielsweise 17, nach unten bewegt. Dadurch wird der andere Arm im Gegensinn verschwenkt und also der entsprechende andere Zapfen mitgenommen. Darüber hinaus wird aber auch die andere Achse, beispielsweise 18, nach unten bewegt, so daß auch die beiden anderen Arme mit verschwenkt werden. Im Endergebnis bewegen sich also alle vier oberen Zapfen 19, 20, 23 und 24 gleichmäßig nach unten, so daß ganz unabhängig von der Druckstelle sich das bewegliche Tastenteil 2 parallel zur Grundplatte 4 nach unten bewegt. Ein Verklemmen in
den Führungen 29, 40; 31, 35 ist demnach nicht zu befürchten. Durch die gleichmäßige Abwärtsbewegung der Zapfen 19, 20, 23 und 24 bewegt sich mit dem Träger 9 dessen Schaltstößel 33 gleichmäßig auf den Schaltkörper 6 unabhängig von der Druckstelle. Ein sicheres Schalten ist damit gewährleistet.The function of the push button described is approximately as follows:
  • If the key cap 10 is pressed in a corner area in the actuation direction B, the pin closest to the pressure point has the tendency to go down. The associated arm is pivoted, causing its axis, for example 17, to move downward. As a result, the other arm is pivoted in the opposite direction and the corresponding other pin is taken along. In addition, the other axis, for example 18, is also moved downward, so that the other two arms are also pivoted. In the end result, all four upper pins 19, 20, 23 and 24 move down evenly, so that the movable key part 2 moves downward parallel to the base plate 4, regardless of the pressure point. A jamming in
the guides 29, 40; 31, 35 is therefore not to be feared. Due to the uniform downward movement of the pins 19, 20, 23 and 24, the switching plunger 33 moves with the carrier 9 uniformly onto the switching body 6 regardless of the pressure point. This guarantees safe switching.

Beim Loslassen der Tastenkappe 10 wirkt die Rückstellkraft des Schaltkörpers 6 auf den Schaltstößel 33. Obwohl dieser ganz außerhalb der Mitte der Taste 1 liegt, wird das bewegliche Tastenteil 2 parallel zurückgestellt. Dabei wirkt an sich die Rückstellbewegung in erster Linie auf den Finger 19. Dessen Arm 13 zieht jedoch über die Achse 17 den Arm 14 und die Achse 18 und damit auch die Arme 15 und 16 mit.When the button cap 10 is released, the restoring force of the switching body 6 acts on the switching plunger 33. Although this is located completely outside the center of the button 1, the movable button part 2 is reset in parallel. The restoring movement acts primarily on the finger 19. However, its arm 13 pulls the arm 14 and the axis 18 and thus also the arms 15 and 16 along the axis 17.

Die beschriebene Doppelschere 11, 12 (Figur 8, 9) ist als Kunststoffteil aufgebaut. Die Doppelschere kann auch aus Draht geformt sein.The described double scissors 11, 12 (FIGS. 8, 9) are constructed as plastic parts. The double scissors can also be formed from wire.

Claims (13)

1. Drucktaste mit einer Betätigungsfläche an einem beweglichen Tastenteil, die groß im Vergleich zu einem zu betätigenden elektrischen Kontakt ist, und mit einer Führungseinrichtung, die das bewegliche Tastenteil gegenüber einem unbeweglichen Tastenteil führt, wobei die Führungseinrichtung einerseits an dem beweglichen und andererseits an dem unbeweglichen Tastenteil angelenkt ist und eine auf einen Randbereich der Betätigungsfläche ausgeübte Betätigungskraft auf einen gegenüberliegenden Randbereich des beweglichen Tastenteils überträgt, dadurch gekennzeichnet, daß die Führungseinrichtung von zwei Scheren (11, 12) gebildet ist, wobei die beiden Arme (13, 14 bzw. 15, 16) jeder Schere (11, 12) an einer Achse (17 bzw. 18) drehbar verbunden sind, daß die beiden Achsen (17, 18) zueinander fluchtend ausgerichtet gehalten sind, daß die oberen freien Enden (19, 20, 23, 24) der vier Scherenarme (13 bis 16) an vier Lagerstellen des beweglichen Tastenteils (2) in Betätigungsrichtung (B) gehalten und quer dazu beweglich sind, wobei die vier Lagerstellen eine Rechteckfläche einschließen, die sich mit der Betätigungsfläche weitgehend deckt, und daß die unteren freien Enden (21, 22, 25, 26) der vier Scherenarme (13 bis 16) an dem unbeweglichen Tastenteil (3) in Betätigungsrichtung (B) gehalten und quer dazu beweglich sind.1. Pushbutton with an actuating surface on a movable key part, which is large compared to an electrical contact to be actuated, and with a guide device which guides the movable key part against an immovable key part, the guide device on the one hand on the movable and on the other hand on the immovable Button part is articulated and transmits an actuating force exerted on an edge area of the actuating surface to an opposite edge area of the movable button part, characterized in that the guide device is formed by two scissors (11, 12), the two arms (13, 14 and 15, 16) each pair of scissors (11, 12) is rotatably connected on an axis (17 or 18), that the two axes (17, 18) are kept in alignment with one another, that the upper free ends (19, 20, 23, 24 ) of the four scissor arms (13 to 16) held at four bearing points of the movable button part (2) in the actuation direction (B) and are movable transversely thereto, the four bearing points enclosing a rectangular area which largely coincides with the actuating area, and in that the lower free ends (21, 22, 25, 26) of the four scissor arms (13 to 16) on the immovable button part ( 3) are held in the direction of actuation (B) and are movable transversely thereto. 2. Drucktaste nach Anspruch 1, dadurch gekennzeichnet, daß die Arme (13 bis 16) der Scheren (11, 12) paarweise zu Rahmen (42) zusammengefaßt sind.2. Push button according to claim 1, characterized in that the arms (13 to 16) of the scissors (11, 12) in pairs are combined into frames (42). 3. Drucktaste nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Achse (17 bzw. 18) der einen Schere (11 bzw. 12) von Fingern (43) der jeweils anderen Schere umgriffen sind.3. Push button according to claim 1 or 2, characterized in that the axis (17 or 18) of the scissors (11 or 12) of fingers (43) of the other scissors are encompassed. 4. Drucktaste nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Achsen (17, 18) mittig an den Armen (13 bis 16) vorgesehen sind.4. Push button according to one of the preceding claims, characterized in that the axes (17, 18) are provided centrally on the arms (13 to 16). 5. Drucktaste nach einem der vorhergehenden Ansprüche 2 bis 4, dadurch gekennzeichnet, daß beide Scheren (11, 12) aus zwei identischen Rahmenteilen (42) zusammengesetzt sind.5. Push button according to one of the preceding claims 2 to 4, characterized in that both scissors (11, 12) are composed of two identical frame parts (42). 6. Drucktaste nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwischen dem beweglichen Tastenteil (2) und dem unbeweglichen Tastenteil (3) eine Verrastung (30, 34; 36, 37) vorgesehen ist.6. Push button according to one of the preceding claims, characterized in that a latching (30, 34; 36, 37) is provided between the movable button part (2) and the immovable button part (3). 7. Drucktaste nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das bewegliche Tastenteil (2) aus einem Träger (9) und einer diesen überdeckenden Tastenkappe (10) zusammengesetzt ist.7. Push button according to one of the preceding claims, characterized in that the movable key part (2) from a carrier (9) and a covering this key cap (10) is composed. 8. Drucktaste nach Anspruch 7, dadurch gekennzeichnet, daß ein Schaltstößel (33) zur Betätigung des elektrischen Kontaktes (6) an dem Träger (9) ausgebildet ist.8. Push button according to claim 7, characterized in that a switching plunger (33) for actuating the electrical contact (6) on the carrier (9) is formed. 9. Drucktaste nach einem der vorhergehenden Ansprüche 7 oder 8, dadurch gekennzeichnet, daß am unbeweglichen Tastenteil (3) eine Führungshülse (29) für einen Bolzen (40) der Tastenkappe (10) ausgebildet ist.9. Push button according to one of the preceding claims 7 or 8, characterized in that a guide sleeve (29) for a bolt (40) of the key cap (10) is formed on the immovable key part (3). 10. Drucktaste nach einem der vorhergehenden Ansprüche 7 bis 9, dadurch gekennzeichnet, daß an dem unbeweglichen Tastenteil (3) Führungsleisten (31) für eine Leiste (35) des Trägers (9) ausgebildet sind.10. Push button according to one of the preceding claims 7 to 9, characterized in that on the immovable button part (3) guide strips (31) for a strip (35) of the carrier (9) are formed. 11. Drucktaste nach Anspruch 9 und 10, dadurch gekennzeichnet, daß außen an der Führungshülse (29) und den Führungsleisten (31) Rastnasen (30, 37) für Rastzungen (34, 36) des Trägers (9) ausgebildet sind.11. Push button according to claim 9 and 10, characterized in that the outside of the guide sleeve (29) and the guide strips (31) locking lugs (30, 37) for locking tongues (34, 36) of the carrier (9) are formed. 12. Drucktaste nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Rückstellkraft für das bewegliche Tastenteil (2) auf den Schaltstößel (33) wirkt.12. Push button according to one of the preceding claims, characterized in that a restoring force for the movable button part (2) acts on the switching plunger (33). 13. Drucktaste nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Schaltstößel (33) außerhalb der Mitte der Betätigungsfläche liegt.13. Push button according to one of the preceding claims, characterized in that the switching plunger (33) lies outside the center of the actuating surface.
EP84108321A 1983-08-17 1984-07-14 Push button Expired EP0134509B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108321T ATE47249T1 (en) 1983-08-17 1984-07-14 PUSH BUTTON.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833329698 DE3329698A1 (en) 1983-08-17 1983-08-17 PRINT BUTTON
DE3329698 1983-08-17

Publications (3)

Publication Number Publication Date
EP0134509A2 true EP0134509A2 (en) 1985-03-20
EP0134509A3 EP0134509A3 (en) 1987-05-06
EP0134509B1 EP0134509B1 (en) 1989-10-11

Family

ID=6206768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108321A Expired EP0134509B1 (en) 1983-08-17 1984-07-14 Push button

Country Status (5)

Country Link
US (1) US4580022A (en)
EP (1) EP0134509B1 (en)
JP (1) JPS6062017A (en)
AT (1) ATE47249T1 (en)
DE (1) DE3329698A1 (en)

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EP0295437A2 (en) * 1987-06-13 1988-12-21 Preh-Werke GmbH & Co. KG Push-button device
EP0490023A1 (en) * 1990-12-10 1992-06-17 Siemens Nixdorf Informationssysteme Aktiengesellschaft Push-button device
EP0543649A2 (en) * 1991-11-19 1993-05-26 Brother Kogyo Kabushiki Kaisha Keyswitch assembly
EP0564230A1 (en) * 1992-03-30 1993-10-06 Brother Kogyo Kabushiki Kaisha Keyswitch assembly
US5278372A (en) * 1991-11-19 1994-01-11 Brother Kogyo Kabushiki Kaisha Keyboard having connecting parts with downward open recesses
US5278374A (en) * 1992-02-14 1994-01-11 Brother Kogyo Kabushiki Kaisha Assembly with an asymmetrical resilient spring
US5278371A (en) * 1992-02-14 1994-01-11 Brother Kogyo Kabushiki Kaisha Keyswitch assembly with support mechanism coupled to support plate beneath printed circuit board
FR2706647A1 (en) * 1993-06-16 1994-12-23 Martin Francois Command detection device for actuator
EP0935267A1 (en) * 1998-02-06 1999-08-11 Minebea Co., Ltd. Push button switch
EP2323149A1 (en) * 2009-06-26 2011-05-18 Oki Electric Industry Co., Ltd. Key switch structure

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JP3201102B2 (en) * 1993-11-05 2001-08-20 ブラザー工業株式会社 Key switch device and method of assembling the same
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DE9407412U1 (en) * 1994-05-04 1994-09-29 Chen Pao Chin Key switch for a computer
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EP0295437A2 (en) * 1987-06-13 1988-12-21 Preh-Werke GmbH & Co. KG Push-button device
EP0295437A3 (en) * 1987-06-13 1990-06-06 Preh-Werke Gmbh & Co. Kg Push-button device
EP0490023A1 (en) * 1990-12-10 1992-06-17 Siemens Nixdorf Informationssysteme Aktiengesellschaft Push-button device
EP0543649A2 (en) * 1991-11-19 1993-05-26 Brother Kogyo Kabushiki Kaisha Keyswitch assembly
EP0543649A3 (en) * 1991-11-19 1993-07-07 Brother Kogyo Kabushiki Kaisha Keyswitch assembly
US5280147A (en) * 1991-11-19 1994-01-18 Brother Kogyo Kabushiki Kaisha Keyswitch assembly with a key support limiting transverse, longitudinal and rotational movement of the key
US5278372A (en) * 1991-11-19 1994-01-11 Brother Kogyo Kabushiki Kaisha Keyboard having connecting parts with downward open recesses
US5278371A (en) * 1992-02-14 1994-01-11 Brother Kogyo Kabushiki Kaisha Keyswitch assembly with support mechanism coupled to support plate beneath printed circuit board
US5278374A (en) * 1992-02-14 1994-01-11 Brother Kogyo Kabushiki Kaisha Assembly with an asymmetrical resilient spring
EP0564230A1 (en) * 1992-03-30 1993-10-06 Brother Kogyo Kabushiki Kaisha Keyswitch assembly
US5329084A (en) * 1992-03-30 1994-07-12 Brother Kogyo Kabushiki Kaisha Keyswitch assembly
FR2706647A1 (en) * 1993-06-16 1994-12-23 Martin Francois Command detection device for actuator
EP0935267A1 (en) * 1998-02-06 1999-08-11 Minebea Co., Ltd. Push button switch
US6011227A (en) * 1998-02-06 2000-01-04 Minebea Co., Ltd. Push button switch
EP2323149A1 (en) * 2009-06-26 2011-05-18 Oki Electric Industry Co., Ltd. Key switch structure
EP2323149A4 (en) * 2009-06-26 2014-04-16 Oki Electric Ind Co Ltd Key switch structure

Also Published As

Publication number Publication date
ATE47249T1 (en) 1989-10-15
JPS6062017A (en) 1985-04-10
DE3329698C2 (en) 1988-01-28
EP0134509A3 (en) 1987-05-06
EP0134509B1 (en) 1989-10-11
DE3329698A1 (en) 1985-03-07
JPH0415967B2 (en) 1992-03-19
US4580022A (en) 1986-04-01

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