EP0042131B1 - Bank of electric key switches - Google Patents

Bank of electric key switches Download PDF

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Publication number
EP0042131B1
EP0042131B1 EP81104409A EP81104409A EP0042131B1 EP 0042131 B1 EP0042131 B1 EP 0042131B1 EP 81104409 A EP81104409 A EP 81104409A EP 81104409 A EP81104409 A EP 81104409A EP 0042131 B1 EP0042131 B1 EP 0042131B1
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EP
European Patent Office
Prior art keywords
key
cover plate
bank
buttons
contacts according
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.)
Expired
Application number
EP81104409A
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German (de)
French (fr)
Other versions
EP0042131A1 (en
Inventor
Gerd Kammerer
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.)
Graesslin KG
Original Assignee
Dieter Graesslin Feinwerktechnik
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Publication date
Application filed by Dieter Graesslin Feinwerktechnik filed Critical Dieter Graesslin Feinwerktechnik
Publication of EP0042131A1 publication Critical patent/EP0042131A1/en
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Publication of EP0042131B1 publication Critical patent/EP0042131B1/en
Expired legal-status Critical Current

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    • 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

Definitions

  • the invention relates to an electrical key contact field according to the preamble of claim 1.
  • Such a key contact field is known from AT-A-356 185.
  • the aim is to arrange the necessary buttons for operating the key contacts as close as possible to one another so that the key contact field can be kept as small as possible or the largest possible key buttons can be used for a given area of the key contact field.
  • This can be achieved by attaching the identification of the keys to the key buttons themselves, as is the case with AT-A-356185 for the key contacts arranged in a square grid.
  • you When affixing the label, you must have as many differently labeled buttons as there are different labels when mounting the button contact fields.
  • the label is applied to the button buttons, it loses focus and recognizability due to the constant touch. For this reason, the markings are often placed next to the buttons on the cover plate. In this case, only one type of button needs to be kept ready when mounting the keypad.
  • this form of identification requires a relatively large distance between the key buttons.
  • buttons are known, the cross section of which has the shape of an elliptical or circular section.
  • these buttons are not in a basic grid of rectangular fields.
  • These are individually arranged buttons that are adapted to sections of a circle that result when a square is fitted into a circle. It is about the utilization of a certain shaped residual space.
  • the invention has for its object to develop an electrical key contact field of the type mentioned, in which the key buttons can be as close together as possible, without the labeling on the key buttons need to be attached, and in which an easily recognizable clear assignment of the labels to their Buttons is reached.
  • the button and the button hole have a circular section-like or similar shape
  • the complementary circular section or similar section that has remained in the cover plate can be used to identify the button. This results in a very clear assignment of the identification to the associated key for a key contact field. This impression of belonging is reinforced by the pulling out or lowering of the area of the cover plate surrounding the key button. Thanks to the invention, the key buttons can therefore be arranged very closely next to one another in a contact field, without there being any doubt as to the assignment of the labels printed on the cover plate or attached in some other way. There is no risk of the marking being abraded by operating fingers.
  • openings 15 are provided in the broken-out cover plate 11 shown for fourteen key buttons 13 lying side by side in rows.
  • the cross section of the key buttons and the key opening in the cover plate 11 have the shape of a circular section, the center angle a being approximately 250 °.
  • the area 17 of the cover plate lying within a circle 18 around the center point M of the circular section-shaped opening 15 is drawn out towards the operating side in the embodiment according to FIG. 2, namely with a convex spherical surface-shaped curvature in the embodiment shown. Accordingly, in the embodiments according to FIGS.
  • the area 19 of the cover plate lying around the opening 15 is lowered with respect to the main plane of the cover plate, with a concave spherical surface-shaped curvature in the exemplary embodiments shown.
  • This design of the cover plate shown in the figures makes the assignment of the identification to the associated key even clearer. If, as has been done in the exemplary embodiments, the operating surface of the button 13 is also spherical and the radius R T of this spherical surface is as large as the radius R A of the spherical surface of the advanced or lowered region 17 or 19, then this results optically an impression as if the identification of the key was applied to the side of a key with a circular cross-section.
  • the area 19 in FIG. 3 is preferably so far lowered with respect to the main plane of the cover plate 11 that when the button 13 is pressed, it forms a uniform spherical surface together with the lowered area 19.
  • the key buttons do not protrude beyond the main plane of the cover plate in the non-pressed state, so that they lie completely in a protective recess.
  • the markings can be printed on the cover plate, and only a single type of push button without a label is required to populate the cover plate.
  • FIG. 1 despite the relatively dense juxtaposition of the key buttons, there is a completely unambiguous assignment of the names to the keys. This assignment can be emphasized even more clearly by structuring the individual surface areas differently.
  • the button buttons 13 and the drawn-out or lowered areas 17, 19 surrounding the button buttons can have a high-gloss finish, while the other areas of the cover plate 11 have a matt surface.
  • the key buttons 13 shown in the figures and the key openings 15 do not necessarily have to be designed in the form of a circular segment.
  • the circular sections can also be modified into elliptical sections or have a similar shape.
  • the extended or lowered regions 17 and 19 do not need to have an arched shape. It is also conceivable that they protrude from or withdraw into the cover plate 11 in a cylindrical shape, that is to say with vertical surfaces.
  • the curvature of the surfaces of the key buttons 13 and / or of the extended or lowered areas 17, 19 pointing in the direction of operation can be designed to deepen towards the center.

Landscapes

  • Push-Button Switches (AREA)

Description

Die Erfindung betrifft ein elektrisches Tastenkontaktfeld gemäss dem Oberbegriff des Anspruches 1. Ein solches Tastenkontaktfeld ist bekannt aus der AT-A-356 185.The invention relates to an electrical key contact field according to the preamble of claim 1. Such a key contact field is known from AT-A-356 185.

Beim Bau von Tastenkontaktfeldern für die Dateneingabe ist man bestrebt, die erforderlichen Knöpfe zur Bedienung der Tastenkontakte möglichst dicht nebeneinander anzuordnen, damit das Tastenkontaktfeld möglichst klein gehalten werden kann bzw. bei gegebener Fläche des Tastenkontaktfeldes möglichst grosse Tastenknöpfe verwendet werden können. Dies ist erreichbar, wenn man die Kennzeichnung der Tasten auf den Tastenknöpfen selbst anbringt, wie dies aus der AT-A-356185 für die in einem quadratischen Gitter angeordneten Tastenkontakte der Fall ist. Bei dieser Anbringung der Kennzeichnung muss man bei der Montage der Tastenkontaktfelder so viele unterschiedlich gekennzeichnete Tastenknöpfe bereithalten, wie unterschiedliche Kennzeichnungen vorkommen. Ausserdem verliert bei Aufbringung der Kennzeichnung auf den Tastenknöpfen diese durch die ständige Berührung an Schärfe und Erkennbarkeit. Aus diesem Grunde werden die Kennzeichnungen häufig neben den Tastenknöpfen auf der Abdeckplatte angebracht. In diesem Falle braucht bei der Montage des Tastenfeldes nur eine Tastenknopfsorte bereitgehalten zu werden. Da jedoch die Zuordnung von Kennzeichnung und zugehörigem Tastenknopf eindeutig und leicht erkennbar sein muss, erfordert diese Form der Kennzeichnung einen relativ grossen Abstand zwischen den Tastenknöpfen.When building key contact fields for data entry, the aim is to arrange the necessary buttons for operating the key contacts as close as possible to one another so that the key contact field can be kept as small as possible or the largest possible key buttons can be used for a given area of the key contact field. This can be achieved by attaching the identification of the keys to the key buttons themselves, as is the case with AT-A-356185 for the key contacts arranged in a square grid. When affixing the label, you must have as many differently labeled buttons as there are different labels when mounting the button contact fields. In addition, when the label is applied to the button buttons, it loses focus and recognizability due to the constant touch. For this reason, the markings are often placed next to the buttons on the cover plate. In this case, only one type of button needs to be kept ready when mounting the keypad. However, since the assignment of identification and associated key button must be clear and easily recognizable, this form of identification requires a relatively large distance between the key buttons.

Aus der AT-A-356185 sind Tastenknöpfe bekannt, deren Querschnitt die Form eines Ellipsen-oder Kreisabschnittes haben. Diese Tastenknöpfe liegen jedoch nicht in einem Grundgitter aus rechteckigen Feldern. Es handelt sich um individuell angeordnete Tasten, die kreisabschnittsförmigen Feldern angepasst sind, die sich ergeben, wenn ein Quadrat in einen Kreis eingepasst wird. Es geht hier um die Ausnutzung eines in bestimmter Weise geformten Restraumes.From AT-A-356185 key buttons are known, the cross section of which has the shape of an elliptical or circular section. However, these buttons are not in a basic grid of rectangular fields. These are individually arranged buttons that are adapted to sections of a circle that result when a square is fitted into a circle. It is about the utilization of a certain shaped residual space.

Aus der DE-A-1 547 539 ist es bekannt, in der von einem Drehknopf begrenzten Kreisfläche zwei, drei oder vier Tastenknöpfe mit sektorförmigem Querschnitt anzuordnen. Beim Drücken jedes Tastenknopfes wird der einen Ring bildende Drehknopf mechanisch mit der dem gedrückten Tastenknopf zugeordneten Verstelleinrichtung gekoppelt. Auf diese Weise wird eine sehr raumsparende Vorrichtung für verstellbare Funktionen von beispielsweise Fernsehgeräten geschaffen.From DE-A-1 547 539 it is known to arrange two, three or four buttons with a sector-shaped cross section in the circular area delimited by a rotary knob. When each button is pressed, the rotary knob forming a ring is mechanically coupled to the adjustment device assigned to the pressed button. In this way, a very space-saving device for adjustable functions of, for example, television sets is created.

Der Erfindung liegt die Aufgabe zugrunde, ein elektrisches Tastenkontaktfeld der eingangs genannten Art zu entwickeln, bei dem die Tastenknöpfe möglichst dicht zusammenliegen können, ohne dass die Kennzeichnung auf den Tastenknöpfen angebracht zu werden braucht, und bei dem eine leicht erkennbare deutliche Zuordnung der Kennzeichnungen zu ihren Tasten erreicht wird.The invention has for its object to develop an electrical key contact field of the type mentioned, in which the key buttons can be as close together as possible, without the labeling on the key buttons need to be attached, and in which an easily recognizable clear assignment of the labels to their Buttons is reached.

Zur Lösung dieser Aufgabe wird ein elektrischer Tastenköntakt nach dem Oberbegriff des Anspruches 1 vorgeschlagen, welcher erfindungsgemäss die im kennzeichnenden Teil des Anspruches 1 genannten Merkmale hat.To solve this problem, an electrical key contact is proposed according to the preamble of claim 1, which according to the invention has the features mentioned in the characterizing part of claim 1.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen genannt.Advantageous developments of the invention are mentioned in the subclaims.

Dadurch, dass der Tastenknopf und das Tastenloch eine kreisabschnittsförmige oder ähnliche Form haben, kann zur Kennzeichnung der Taste der in der Abdeckplatte stehengebliebene komplementäre Kreisabschnitt oder ähnliche Abschnitt verwendet werden. Hierdurch ergibt sich bei einem Tastenkontaktfeld optisch eine sehr klare Zuordnung der Kennzeichnung zur zugehörigen Taste. Dieser Zugehörigkeitseindruck wird noch verstärkt durch das Hervorziehen oder Absenken des den Tastenknopf umgebenden Bereiches der Abdeckplatte. Dank der Erfindung können die Tastenknöpfe in einem Kontaktfeld daher sehr eng nebeneinander angeordnet werden, ohne dass Zweifel an der Zuordnung der auf der Abdeckplatte aufgedruckten oder in anderer Weise angebrachten Kennzeichnungen entstehen. Die Gefahr eines Abriebs der Kennzeichnung durch bedienende Finger ist nicht vorhanden.Due to the fact that the button and the button hole have a circular section-like or similar shape, the complementary circular section or similar section that has remained in the cover plate can be used to identify the button. This results in a very clear assignment of the identification to the associated key for a key contact field. This impression of belonging is reinforced by the pulling out or lowering of the area of the cover plate surrounding the key button. Thanks to the invention, the key buttons can therefore be arranged very closely next to one another in a contact field, without there being any doubt as to the assignment of the labels printed on the cover plate or attached in some other way. There is no risk of the marking being abraded by operating fingers.

Anhand des in den Figuren gezeigten Ausführungsbeispieles soll die Erfindung näher erläutert werden. Es zeigen

  • Fig. 1 ein Tastenfeld mit Tastenkontakten gemäss der Erfindung in Draufsicht,
  • Fig. 2 bis 4 einen Schnitt durch den oberen Teil eines Tastenknopfes mit umgebender Abdeckplatte längs der Linie A-B in Fig. 1 für drei verschiedene Ausführungsformen von Tastenknopf um umgebenden Abdeckplattenbereich.
Based on the embodiment shown in the figures, the invention will be explained in more detail. Show it
  • 1 shows a keypad with key contacts according to the invention in plan view,
  • Fig. 2 to 4 shows a section through the upper part of a button with surrounding cover plate along the line AB in Fig. 1 for three different embodiments of the button around the surrounding cover plate area.

In Fig. 1 sind in der herausgebrochenen dargestellten Abdeckplatte 11 Öffnungen 15 für vierzehn in Reihen nebeneinanderliegende Tastenknöpfe 13 vorgesehen. Der Querschnitt der Tastenknöpfe und die Tastenöffnung in der Abdeckplatte 11 haben die Form eines Kreisabschnittes, wobei der Mittelpunktswinkel a etwa 250° beträgt. Der innerhalb eines Kreises 18 um den Kreismittelpunkt M der kreisabschnittsförmigen Öffnung 15 liegende Bereich 17 der Abdeckplatte ist bei der Ausführungsform gemäss Fig. 2 zur Bedienungsseite hin hervorgezogen, und zwar mit einer konvexen kugelflächenförmigen Wölbung im gezeigten Ausführungsbeispiel. Entsprechend ist bei den Ausführungsformen gemäss Fig. 3 und 4 der um die Öffnung 15 liegende Bereich 19 der Abdeckplatte in bezug auf die Hauptebene der Abdeckplatte abgesenkt, und zwar mit einer konkaven kugelflächenförmigen Wölbung in den gezeigten Ausführungsbeispielen. Durch diese in den Figuren gezeigte Formgebung der Abdeckplatte wird die Zuordnung der Kennzeichnung zur zugehörigen Taste noch deutlicher. Wenn, wie in den Ausführungsbeispielen geschehen, auch die Bedienungsfläche des Tastenknopfes 13 kugelflächenförmig ausgebildet ist und der Radius RT dieser Kugelfläche ebenso gross ist wie der Radius RA der Kugelfläche des vorgezogenen bzw. abgesenkten Bereiches 17 bzw. 19, dann ergibt sich optisch ein Eindruck, als wenn die Kennzeichnung der Taste seitlich auf einer Taste mit kreisförmigem Querschnitt aufgebracht sei. Vorzugsweise ist der Bereich 17 in Fig. 2 so weit zur Bedienungsseite hin aus der Hauptebene der Abdeckplatte 11 hervorgezogen, dass bei gedrücktem Tastenknopf 13 dieser zusammen mit dem gewölbten Bereich 17 eine einheitliche kugelförmige Fläche bildet. Entsprechend ist der Bereich 19 in Fig. 3 vorzugsweise soweit in bezug auf die Hauptebene der Abdeckplatte 11 abgesenkt, dass bei gedrücktem Tastenknopf 13 dieser zusammen mit dem abgesenkten Bereich 19 eine einheitliche kugelförmige Fläche bildet.In Fig. 1, openings 15 are provided in the broken-out cover plate 11 shown for fourteen key buttons 13 lying side by side in rows. The cross section of the key buttons and the key opening in the cover plate 11 have the shape of a circular section, the center angle a being approximately 250 °. The area 17 of the cover plate lying within a circle 18 around the center point M of the circular section-shaped opening 15 is drawn out towards the operating side in the embodiment according to FIG. 2, namely with a convex spherical surface-shaped curvature in the embodiment shown. Accordingly, in the embodiments according to FIGS. 3 and 4, the area 19 of the cover plate lying around the opening 15 is lowered with respect to the main plane of the cover plate, with a concave spherical surface-shaped curvature in the exemplary embodiments shown. This design of the cover plate shown in the figures makes the assignment of the identification to the associated key even clearer. If, as has been done in the exemplary embodiments, the operating surface of the button 13 is also spherical and the radius R T of this spherical surface is as large as the radius R A of the spherical surface of the advanced or lowered region 17 or 19, then this results optically an impression as if the identification of the key was applied to the side of a key with a circular cross-section. The area 17 in FIG. 2 is preferably drawn out from the main plane of the cover plate 11 to the operating side to such an extent that when the button 13 is pressed, it forms a uniform spherical surface together with the curved area 17. Correspondingly, the area 19 in FIG. 3 is preferably so far lowered with respect to the main plane of the cover plate 11 that when the button 13 is pressed, it forms a uniform spherical surface together with the lowered area 19.

Bei den Ausführungsformen nach Fig. 3 und 4 ragen die Tastenknöpfe im nicht gedrückten Zustand nicht über die Hauptebene der Abdeckplatte hinaus, so dass sie vollständig in einer schützenden Versenkung liegen.In the embodiments according to FIGS. 3 and 4, the key buttons do not protrude beyond the main plane of the cover plate in the non-pressed state, so that they lie completely in a protective recess.

Beim Bau eines Tastenkontaktfeldes mit den Tastenkontakten gemäss der Erfindung können die Kennzeichnungen auf der Abdeckplatte aufgedruckt werden, und zur Bestückung der Abdeckplatte ist nur eine einzige, bezeichnungsfreie Druckknopfart erforderlich. Wie Fig. 1 zeigt, besteht trotz des verhältnismässig dichten Nebeneinanderliegens der Tastenknöpfe eine völlig zweifelsfreie Zuordnung der Bezeichnungen zu den Tasten. Diese Zuordnung kann noch deutlicher dadurch hervorgehoben werden, dass die einzelnen Oberflächenbereiche unterschiedlich strukturiert werden. So können beispielsweise die Tastenknöpfe 13 und die die Tastenknöpfe umgebenden hervorgezogenen oder abgesenkten Bereiche 17, 19 hochglänzend ausgeführt sein, während die übrigen Bereiche der Abdeckplatte 11 eine matte Oberfläche haben.When building a key contact field with the key contacts according to the invention, the markings can be printed on the cover plate, and only a single type of push button without a label is required to populate the cover plate. As shown in FIG. 1, despite the relatively dense juxtaposition of the key buttons, there is a completely unambiguous assignment of the names to the keys. This assignment can be emphasized even more clearly by structuring the individual surface areas differently. For example, the button buttons 13 and the drawn-out or lowered areas 17, 19 surrounding the button buttons can have a high-gloss finish, while the other areas of the cover plate 11 have a matt surface.

Es versteht sich, dass die in den Figuren gezeigten Tastenknöpfe 13 und die Tastenöffnungen 15 nicht unbedingt kreisabschnittsförmig ausgeführt zu sein brauchen. Die Kreisabschnitte können auch zu Ellipsenabschnitten abgewandelt sein oder eine ähnliche Form haben. Entsprechendes gilt für die die Tastenknöpfe umgebenden vorgezogenen bzw. abgesenkten Bereiche 17 bzw. 19. Selbstverständlich brauchen die hervorgezogenen bzw. abgesenkten Bereiche 17 bzw. 19 nicht eine gewölbte Form zu haben. Es ist auch denkbar, dass sie in zylindrischer Form, also mit senkrechten Flächen zur Abdeckplatte 11 aus dieser hervortreten oder in diese zurücktreten. Ferner kann die Wölbung der in Bedienungsrichtung weisenden Flächen der Tastenknöpfe 13 und/oder der vorgezogenen oder abgesenkten Bereiche 17, 19 sich zum Zentrum hin vertiefend ausgebildet sein.It goes without saying that the key buttons 13 shown in the figures and the key openings 15 do not necessarily have to be designed in the form of a circular segment. The circular sections can also be modified into elliptical sections or have a similar shape. The same applies to the extended or lowered regions 17 and 19 surrounding the key buttons. Of course, the extended or lowered regions 17 and 19 do not need to have an arched shape. It is also conceivable that they protrude from or withdraw into the cover plate 11 in a cylindrical shape, that is to say with vertical surfaces. Furthermore, the curvature of the surfaces of the key buttons 13 and / or of the extended or lowered areas 17, 19 pointing in the direction of operation can be designed to deepen towards the center.

Claims (11)

1. Electric bank of key contacts with the key contacts being arranged in a basic lattice of rectangular, preferably square fields, and with a cover plate (11) having openings (15) through which the key buttons (13) of the key contacts project to the service side, characterized in that said button openings (15) in the cover plate (11) and the cross sections of the key buttons (13) have the shape of a circular segment, an elliptical segment or a similarly shaped segment, and that the marking of the individual buttons is arranged by providing corresponding characters (0-9, S, M, U, L) on the cover plate (11) in the complementary segment of said circular and elliptical segment respectively.
2. Bank of key contacts according to claim 1, characterized in that the central angle (a) of the said segment is greater than 180°.
3. Bank of key contacts according to claim 2, characterized in that said central angle (a) is between 220 and 280°.
4. Bank of key contacts according to any of claim 1 to 3, characterized in that an area (17) of the cover plate (11), which is defined by a circle or an ellipse or a similar curve respectively lying concentric with respect to the circle centerpoint or .ellipse centerpoint respectively of the key openings (15) is bent out of the main plane of the cover plate to the service side, namely at most as far as the key buttons (13) project out of the main plane of the cover plate in their pressed-down condition.
5. Bank of key contacts according to claim 4, characterized in that the surface of said forwardly- bent areas (17) of said cover plate (11) around the key buttons are arched convexly, and that preferably spherical.
6. Bank of key contacts according to any of claim 1 to 3, characterized in that an area (19) of the cover plate (11), which is defined by a circle or an ellipse or a similar curve respectively lying concentric with respect to the circle centerpoint or ellipse centerpoint respectively of the key openings (15) is lowered with respect to the main plane of the cover plate, and that the key buttons do not project beyong the main plane of the cover plate in their not-pressed condition.
7. Bank of key contacts according to claim 6, characterized in that the surfaces of the lowered areas (19) of the cover plate (11) around the key buttons (13) are arched concavely, and that preferably spherical.
8. Bank of key contacts according to claim 6 or 7, characterized in that the lowered areas (19) are lowered to such an extent that in the pressed condition of the key buttons (13) there exists a stepless transition between the lowered area (19) and the service surface of the key buttons (13).
9. Bank of key contacts according to any of the preceding claims, characterized in that the service surface of the key buttons is arched convexly or concavely, and that preferably spherical.
10. Bank of key contacts according to claim 9, characterized in that the radius of the spherically or differently arched service surface of the key buttons and the radius of the spherically or differently arched areas of the cover plate which areas are bent forwardly or rearwardly around the key buttons are equally large.
11. Bank of key contacts according to any of the preceding claims, characterized in that the nonsymmetrical key openings and key buttons of the key contacts are all oriented so as to have the same angular position with respect to the cover plate (11) (figur 1).
EP81104409A 1980-06-18 1981-06-09 Bank of electric key switches Expired EP0042131B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE8016058U 1980-06-18
DE8016058U DE8016058U1 (en) 1980-06-18 1980-06-18 Electrical key contact
US06/270,312 US4420666A (en) 1980-06-18 1981-06-04 Electrical key contact

Publications (2)

Publication Number Publication Date
EP0042131A1 EP0042131A1 (en) 1981-12-23
EP0042131B1 true EP0042131B1 (en) 1985-01-16

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Application Number Title Priority Date Filing Date
EP81104409A Expired EP0042131B1 (en) 1980-06-18 1981-06-09 Bank of electric key switches

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Country Link
US (1) US4420666A (en)
EP (1) EP0042131B1 (en)
JP (1) JPS5725626A (en)
DE (1) DE8016058U1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140622B (en) * 1983-05-10 1987-04-08 Adco Ind Components A keyboard assembly
JPS62165619U (en) * 1986-04-11 1987-10-21
US5512721A (en) * 1993-09-28 1996-04-30 Unisurge, Inc. Autoclavable electrical switch assembly for use with a medical device and medical device using the same
US7056043B2 (en) * 2004-02-26 2006-06-06 Research In Motion Limited Keyboard for a mobile device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2459862A (en) * 1949-01-25 Ten keylentry mechanism
US1337217A (en) * 1916-02-04 1920-04-20 Nat Carbon Co Inc Battery-switch
DE1190066B (en) * 1963-01-30 1965-04-01 Telefunken Patent Push or slide key assembly
DE1547539A1 (en) * 1967-06-28 1970-07-23 Nordmende Control organ for setting or tuning means in electrical devices, preferably in electrical communication devices
US4024368A (en) * 1975-10-02 1977-05-17 Litton Systems, Inc. Switch assembly having selective actuation sensitivity
JPS5817269Y2 (en) * 1976-05-20 1983-04-07 セイコーエプソン株式会社 Exterior structure of electronic clock with calculator
FR2355367A1 (en) * 1976-06-17 1978-01-13 Otis Elevator Co Passenger lift pushbutton system - has movable and surrounding fixed flange forming spherical dome
US4128889A (en) * 1976-06-28 1978-12-05 Hoshidenki-Seizo Kabushiki Kaisha Pen type electronic digital calculator
US4292510A (en) * 1978-03-28 1981-09-29 Manfred Hild Keyboard for a miniature calculator
AT356185B (en) * 1978-06-21 1980-04-10 Kapsch Telephon Telegraph PUSH BUTTON SELECTOR FOR TELEPHONE APPARATUS OR THE LIKE.

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Publication number Publication date
EP0042131A1 (en) 1981-12-23
DE8016058U1 (en) 1980-09-25
US4420666A (en) 1983-12-13
JPS5725626A (en) 1982-02-10

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