EP0805465B1 - Flache mechanische Tastatur - Google Patents

Flache mechanische Tastatur Download PDF

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Publication number
EP0805465B1
EP0805465B1 EP97400991A EP97400991A EP0805465B1 EP 0805465 B1 EP0805465 B1 EP 0805465B1 EP 97400991 A EP97400991 A EP 97400991A EP 97400991 A EP97400991 A EP 97400991A EP 0805465 B1 EP0805465 B1 EP 0805465B1
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EP
European Patent Office
Prior art keywords
keys
key
principal
neighbouring
tertiary
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 - Lifetime
Application number
EP97400991A
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English (en)
French (fr)
Other versions
EP0805465A1 (de
Inventor
Jean-Loup Gillot
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.)
Orange SA
Original Assignee
France Telecom SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by France Telecom SA filed Critical France Telecom SA
Publication of EP0805465A1 publication Critical patent/EP0805465A1/de
Application granted granted Critical
Publication of EP0805465B1 publication Critical patent/EP0805465B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H13/84—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 characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00—Facilitation of operation; Human engineering
    • H01H2217/012—Two keys simultaneous considerations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00—Facilitation of operation; Human engineering
    • H01H2217/036—Plural multifunctional miniature keys for one symbol

Definitions

  • the present invention relates to a keyboard mechanical plan intended to be integrated in particular in handheld electronic or computer devices of microcomputer type or in telephones portable for example.
  • Mechanical keyboards are very common on the market. There are notably membrane keyboards, soft contact keyboards or keyboards touchscreen. See for example document DE-A-2 729 157.
  • Figures 1A to 1C illustrate three types of keyboards belonging to the prior art. These three keyboards are made to the same dimensions and the spacing E between the centers of two neighboring keys is constant from one keyboard to another. Only the width of the keys, noted respectively l A , l B and l C , varies from one keyboard to another. However, it is this dimension of the keys which plays a very large role in the value of the margin of error from which a user benefits around the center of a key on a keyboard.
  • the margin of error is defined geometrically as the size of a horizontal, or vertical, segment on which the center of the finger must be for the keystroke to be valid. This margin is in fact inversely proportional to the typing precision.
  • the value of the spacing E between the centers of two adjacent keys, for keyboards of reduced size intended for pocket devices is between 1 and 1.5 cm.
  • Figures 1A to 1C show the evolution of the margin of error, denoted m A , m B and m C , depending on the width of the keys. It appears that when the width l C of the keys is equal to E, the margin of error m C is minimal, that is to say that a user must be very careful not to hit on two keys simultaneously.
  • FIG. 1B illustrates an intermediate case where the value of l B is between E and Ed.
  • the present invention solves all of these problems since it offers a mechanical keyboard plan, intended to be integrated into a device pocket electronics with buttons between the main keys.
  • These keys secondary are movable and driven down by the main keys, when these are themselves driven down when typing by a user's finger. These secondary keys thus increase the striking surface and significantly improve typing comfort since the finger is never in contact with at least an angular edge of the main key.
  • keyboards having a surface flat, allows better readability of symbols which are written on the keyboard between two keys main contiguous. Indeed, in keyboards classic, the keys being in relief, during a use of the keyboard in an oblique position with respect to to the axis of vision of a user's eye, such symbols are partially hidden by the keys in relief.
  • FIG. 2 illustrates a first embodiment a keyboard designated by the reference 10.
  • This keyboard has main keys noted P which are ordered in matrix form. These main keys are separated from each other by mobile intermediate spaces also called secondary keys and noted S.
  • Each P key is therefore surrounded by four S keys.
  • the P key is mechanically linked to the four keys S that surround it, but it is quite possible to create a keyboard in which each P key is mechanically connected to only one, or two or three secondary keys.
  • the secondary keys show a hexagonal surface, but this shape is not essential and they can have surfaces of any other form.
  • the main keys P and secondary S are preferably at the same level of so that the surface of the keyboard at rest is completely flat.
  • the four main functions for operate the keys of a conventional keyboard are guiding the keys in their movement vertical, the reaction force allowing to bring back keys in high position, key lock in the high position, and the electrical contact. Both first listed functions are performed by means of of drive mechanisms.
  • each of these drive mechanisms is placed under each of keys.
  • these drive mechanisms are advantageously distributed between the main keys P and the keys secondary S. This distribution thus allows each main key P to train its four keys secondary neighbors down under the action of a press, and vice versa each secondary key S exercises a restoring force so as to bring its two adjacent main keys in the high position when no pressure is exerted on them.
  • the striking surface of a P key is increased and includes not only the touch main P but also the four keys neighboring secondary S.
  • This striking surface is designated by the reference 20 in Figure 2, it is octagonal and delimited by a thick black line.
  • This surface being flat, when a user taps on the corresponding main P key, even if his finger overlaps one or more secondary keys S neighboring it remains in contact with a flat surface, and does not rub, as on classic keyboards, on an angular edge of the fingerboard.
  • the problem of friction against an angular edge being avoided, the key size may be as small that we want.
  • the striking zone 20 thus created allows considerably reduce the number of faults strikes likely to occur. The striking of a text can then be run for a long time, without any discomfort for the user.
  • the size of the main keys is such that it makes it possible to minimize typing precision, that is to say to increase the margin of error from which a user benefits around the center of a P key.
  • the keys P can, without drawbacks, be smaller than the contact surface of a finger since the secondary keys make it possible to maintain a flat typing surface.
  • the width 1 of the main keys P is preferably between E, that is to say the value of the spacing between the centers of two contiguous keys P, and Ed.
  • their surface is between 0.04 and 1 cm 2 .
  • this surface can always be enlarged, and can for example reach a value equal to 1.5 cm 2 .
  • the secondary keys S are small enough that a "random" keystroke always results in the movement of at least one main key, regardless of the typing area. Consequently, the width of the secondary keys must be less than or equal to the diameter d of the contact surface of a finger. It is, for example, between approximately 0.2 cm and 0.7 cm.
  • FIG. 3A represents a sectional view of the keys on the rest, i.e. in the high position, while the Figure 3B shows a sectional view of the keys when pressed under the action of a pressing a main key.
  • the primary and secondary keys are based on a base 30.
  • the two types of button have common guide means 31.
  • the guide means 31 comprise at their upper end two pins 32. These pins 32 constitute upward locking means. They each act on cylinder 43 with a touch main, which is located between the means of guide 31 of this key, so as to block it in limit switch, when the main button goes up high position under the action of the restoring forces exerted under the secondary keys.
  • Elastic means 34 such as springs for example, are provided only under the secondary keys S so that they exert the restoring force f r intended to return the neighboring main keys to the high position.
  • electrical contacts 35 are only provided under the main P keys for allow to control the writing of characters correspondents registered on these keys. In principle, we prefer not to provide contact under the keys secondary S since these are not intended for order writing characters but only at increase the hitting area.
  • the secondary keys S appear under the shaped like an inverted U and have, at each end branches of the U, a tongue 41 for supporting the neighboring P keys. These tabs 41 thus allow to train the main keys they support towards the high position, under the action of the force of recall fr exerted by the spring 34.
  • the main P keys appear under the form a T and have, at each end of the horizontal bar of the T, a tongue 42.
  • Each tongue 42 rubs on the one hand against a means of guide 31, so as to ensure good support vertical of the P key when it is pressed, and presses on the other hand on a tongue 41 of a key S neighbor so as to train this S key towards the low when the button is pressed main.
  • These tabs 41 and 42 allow by consequent to mechanically connect a key main P with one or more secondary keys S.
  • FIG. 3B illustrates what happens when a pressure, designated by the letter F and represented by an arrow, is exerted on the central key P.
  • the tabs 42 of the P key then press the tabs 41 of the neighboring S keys.
  • the P key is pressed and therefore carries with it the neighboring secondary keys defining the striking zone while the other two P keys, located on either side of this striking zone, remain in the high position since no pressure is required. 'is exercised there.
  • the key P pressed then establishes contact with the electrical contacts 35 so as to control the writing of the character which corresponds to it.
  • the springs 34 placed under the secondary keys of the striking zone are compressed and exert a restoring force f r . This restoring force f r allows, when the pressure F is removed, to bring the key P pressed in the high position.
  • FIG. 4 illustrates a mode of realization of a keyboard according to the invention designated by the reference 100.
  • This keyboard also includes main keys denoted P 'ordered in form matrix.
  • These keys P ' are separated from each other by mobile intermediate spaces. These spaces There are two types of mobile intermediaries: rectangular spaces called secondary keys, denoted S ', and square spaces called keys tertiary, noted T. Each tertiary key T is framed by four secondary keys S 'and four main keys P ', the keys S' sharing the sides of the T key, and the P 'keys sharing the corners.
  • the shapes of the S 'and T keys are not limited to rectangular and square shapes, they depend in particular on the shape of the main keys as well as their arrangement which is not necessarily matrix.
  • the P ', S' and T keys are all on the same level so that the keyboard surface is flat.
  • the mechanisms buttons are distributed among the three types of keys. Therefore, when user presses a key P ', the latter brings with it, in its vertical movement, the corresponding striking zone defined by the four adjacent S 'keys and the four adjacent T keys. This typing area is highlighted by a thick black line and designated by the reference 200 on the figure 4.
  • the drive mechanisms are more particularly arranged so that the touch main P 'drives down the keys secondary S 'neighbors which are mechanically connected and which in turn lead the four neighboring T tertiary keys attached to them mechanically linked.
  • the four tertiary keys T exert a restoring force at each corner of the area typing and drag up the four keys S 'neighbors which are mechanically connected to it and which in turn lead to the P 'key which they frame and to which they are mechanically linked.
  • Blocking means make it possible to block the upward movement of the main key and the stabilize in high position.
  • the P 'key allows besides blocking the elevation of the secondary keys S ', which in turn block the elevation of the T keys, so that all the P ', S' and T keys are stabilized in an identical high position giving the keyboard a flat surface.
  • the width of the keys P ' is of the same order of size than that of the keys P of the keyboard 10 according to the first embodiment.
  • the dimensions of the secondary keys S 'and tertiary T are also small enough so that none of them can be dragged towards the down by a user's finger without at least one main keys P 'is also not.
  • Figures 5A and 5B respectively represent a section view A-A and a section view B-B of the keyboard 100 of Figure 4.
  • FIG. 5A more particularly illustrates the relationship between a main key P 'and two keys Are neighbors. These two types of keys have common 360 guide means. Of course, in a variant embodiment, these guide means can be specific to each type of key.
  • the guide means 360 comprise, at their upper end, locking means 370 against which abuts the lower end 403 of the main key P 'when it goes up high position.
  • the main key P ' has tabs 420 capable of pushing on tabs 410 secondary keys S 'so as to train them down, and to ensure the vertical maintenance of the key P 'by rubbing against the guide means 360.
  • the tongues 410 of the keys S ' push on the tabs 420 of the P 'key to bring the latter back to position high.
  • These tabs 410 and 420 make it possible to connect mechanically a key P 'with one or more keys secondary S '. 350 electrical contacts are provided on the base 300, under the key P '.
  • Figure 5B illustrates the relationship between a tertiary key T and two keys secondary S 'neighbors.
  • the two types of keys have common guide means 380.
  • An elastic means 390 such as a spring for example, is placed under the key T.
  • the keys S ' have tongues 415 capable of pushing on tongues 430 of the key T so as to drive the latter down, and ensuring a vertical hold of the key S 'by rubbing against the guide means 380.
  • the spring 390 exerts a restoring force f r .
  • the restoring force f r allows the tongues 430 of the key T to push on the tongues 415 of the keys S' in order to raise them to the high position.
  • These tongues 415 and 430 make it possible to mechanically connect a secondary key S 'to one or more tertiary key (s) T.
  • the keys S' then carry the key P 'with them by means of their tongues 410.
  • FIGS. 6A to 6D provide a better understanding the structure of the keyboard 100 since they represent top views of part of this keyboard at different stages of its manufacture.
  • FIG. 6A represents the guide means 360 common to the keys P 'and S', the guide means 380 common to keys S 'and T, the blocking means 370 main keys P 'and the spring 390 allowing to exercise the restoring force under a tertiary touch.
  • FIG. 4D illustrates the final stage of manufacture, when the main keys P 'are in place in their homes.
  • FIGS. 7A to 7D illustrate a variant of realization of this keyboard 100.
  • This variant consists in slightly tilting the contact zones between the main keys and the secondary keys and, similarly, between the secondary keys and the tertiary keys. This allows, when a main key P 1 is struck and the corresponding typing zone is pressed, the sixteen neighboring main and secondary keys to switch slightly towards the typing zone, and to simulate an elastic deformation of these keys framing the striking zone during the movement of the latter. Furthermore, this tilting of the sixteen keys adjacent to the typing zone offers a slightly concave shape complementary to the convex shape of a finger.
  • FIG. 7C shows the keys P 1 and S 1 when they are fully pressed. In this case, an additional force f 5 exerted by S 1 on the button P 2 makes it possible to stabilize the latter in its inclined position.
  • FIGS. 7A and 7D show the three types of keys at rest, when all the pairs of forces (f 1 , f 3 ) and (f 2 , f 4 ) are balanced.
  • This variant has a great advantage. Indeed, if the position of the finger coming hitting a striking area is sufficiently offset at the time of typing so that it touches one of the main keys next to the typing area, after switching this key, the position oblique it has acquired will prevent a contact electric can take place at the end of the race with the contacts 350 placed on the base 300 of the keyboard. Through therefore, the margin of error for typing is further increased.
  • the shape of the surface of the S and T keys defining the intermediate space is not essential, it can be either hexagonal, or square, cruciform or other. It is this form which determines the number of secondary keys and / or tertiary in relation to the number of keys main.
  • FIG. 8 which illustrates a variant of a keyboard, the number of secondary keys cruciform is equal to the number of main keys.
  • the number of S keys mechanically linked to a P key and the number of T keys mechanically connected to an S key are also not essentials. They are at least equal to 1. In the examples cited in the description these numbers were maximum and equal respectively to the number of keys S surrounding a P key and the number of S keys framing a T key.
  • the shape of the main keys is also not limited to the square, it can still be circular, hexagonal or lozenge for example.
  • An alternative embodiment also consists of slightly undulate the surface of the keyboard so that improve typing comfort.
  • the main keys have a slightly shaped concave, complementary to that of the finger. otherwise secondary keys, and tertiary keys when provided, have a convex shape so that there is no break in slope.
  • the keyboard surface therefore has a doubly aspect wave, along the vertical and horizontal axes; the horizontal axis being defined by the axis crossing the keyboard from left to right and the vertical axis being defined by the axis crossing the keyboard from top to bottom.
  • Another alternative embodiment consists in bringing together all the space between the keys main keys in a single secondary key able to be dragged down by each key main.
  • This unique secondary touch is brought back upwards by several springs placed for example at its four ends.
  • the keys main ones are also equipped with springs, low intensity, so that the keys that do not are not pressed at the time of typing remain in high position.
  • the advantage of this variant is the simplicity since the impact resistance is practically independent of the number of keys main hit simultaneously due to the large resistance linked to the secondary key.
  • On the other hand has the disadvantage of offering more inertia great when typing and setting movement of the secondary key, i.e. it requires more striking energy on the part of the user.
  • k would have to be equal to 2 but this case is impossible since k must remain less than [(l + 1) * (c + 1)] / (l * c) where l and c are the number of lines and keyboard columns and [(l + 1) * (c + 1)] the number of secondary keys, so that the total force attracting the keyboard at rest down is not greater to the force that pushes it up.
  • such an embodiment also allows, in the case where the contact areas between the keys are tilted, greatly increase the strength of lever causing the keys adjacent to the knock on the latter. Indeed, the springs in extension draw these keys down and feature more than one lever arm much larger than that of the force f2 exerted by the S2 key of the keyboard of FIG. 7B.

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  • Input From Keyboards Or The Like (AREA)

Claims (7)

  1. Flache mechanische Tastatur, bestimmt zur Integration in eine elektronische Taschenvorrichtung, umfassend:
    mehrere Haupttasten (P), von denen jede von einer oder mehreren Sekundärtasten (S) umgeben ist und mechanisch mit zumindest einer dieser Sekundärtasten verbunden ist, um eine Anschlagzone (20) zu definieren,
    Mitnehmer-Mechanismen der Haupttasten (P) und der Sekundärtasten (S), so dass jede Haupttaste (P) unter der Wirkung eines Drucks (F) diejenige(n) benachbarter) Sekundärtaste(n) nach unten zieht, die mit ihr verbunden ist (sind) und dass jede Sekundärtaste (S) eine Rückstellkraft (fr) ausübt, die fähig ist, die benachbarte(n) Haupttaste(n), die mit ihr mechanisch verbunden ist (sind), bei Fehlen eines auf diese letztere(n) ausgeübten Drucks in die obere Stellung zurückzubringen,
    elektrische Kontakte (35), vorgesehen unter jeder Haupttaste (P) und aktiviert durch Druck auf die entsprechende Haupttaste (P),
    dadurch gekennzeichnet,
    dass sie außerdem Tertiärtasten (T) umfasst, jede umgeben von vier Sekundärtasten (S) und vier Haupttasten (P) und mechanisch mit wenigstens einer Sekundärtaste (S) verbunden; und dadurch, dass die Mitnehmer-Mechanismen so zwischen den drei Tastentypen verteilt sind,
    dass jede Haupttaste (P) unter der Wirkung eines Drucks die mechanisch mit ihr verbundener) benachbarte(n) Sekundärtaste(n) nach unten mitnimmt, die ihrerseits die mit ihr mechanisch verbundene(n) benachbarte(n) Tertiärtaste(n) (T) mitnehmen; und dass jede Tertiärtaste (T) eine Rückstellkraft (fr) ausübt, die fähig ist, bei Fehlen von Druck die mechanisch mit ihr verbundene(n) benachbarte(n) Sekundärtaste(n) (S) in die obere Stellung zu bringen, die ihrerseits bei ihrer (ihren) Aufwärtsbewegung(en) die Haupttaste (P) mitnimmt (mitnehmen), mit der sie mechanisch verbunden ist (sind).
  2. Mechanische Tastatur nach Anspruch 1, dadurch gekennzeichnet, dass sie außerdem Aufwärts-Blockiereinrichtungen (370) der Haupttasten (P') umfasst.
  3. Mechanische Tastatur nach Anspruch 1, dadurch gekennzeichnet, dass die Mitnehmermechanismen umfassen:
    Führungseinrichtungen (360) für jeweils eine Taste oder gemeinsam für zwei aneinandergrenzende Tasten,
    elastische Einrichtungen (390), unter den Tertiärtasten (T) befindlich, welche die Rückstellkraft (fr) ausüben, die nacheinander die Sekundärtasten (S') und die benachbarten Haupttasten (P') in die obere Stellung zurückbringen.
  4. Mechanische Tastatur nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Sekundärtasten (S) und die Tertiärtasten (T) jeweils Unterstützungszungen (410) der benachbarten Haupttasten (P) und Überstützungzungen (430) der benachbarten Sekundärtasten (S) umfassen.
  5. Mechanische Tastatur nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Abmessungen der Sekundärtasten (S) und/oder Tertiärtasten (T) ausreichend klein sind, sodass keine von ihnen durch den Finger eines Benutzers mitgenommen werden kann, ohne dass auch wenigstens eine der benachbarten Haupttasten (P) mitgenommen wird.
  6. Mechanische Tastatur nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Kontaktzonen zwischen den Haupttasten (P) und den Sekundärtasten (S) und die Kontaktzonen zwischen den Sekundärtasten (S) und den Tertiärtasten (T) leicht geneigt sind, um beim Anschlagen einer Haupttaste (P) eine elastische Verformung der der entsprechenden Anschlagszone (20, 200) benachbarten Tasten zu simulieren.
  7. Mechanische Tastatur nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Oberfläche der Haupttasten (P) leicht konkav ist und die Oberfläche der Sekundärtasten (S) und Tertiärtasten (T) leicht konvex ist.
EP97400991A 1996-05-02 1997-05-02 Flache mechanische Tastatur Expired - Lifetime EP0805465B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9605515 1996-05-02
FR9605515A FR2748345B1 (fr) 1996-05-02 1996-05-02 Clavier mecanique plan

Publications (2)

Publication Number Publication Date
EP0805465A1 EP0805465A1 (de) 1997-11-05
EP0805465B1 true EP0805465B1 (de) 2000-08-16

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EP97400991A Expired - Lifetime EP0805465B1 (de) 1996-05-02 1997-05-02 Flache mechanische Tastatur

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US (1) US5861588A (de)
EP (1) EP0805465B1 (de)
DE (1) DE69702808T2 (de)
FR (1) FR2748345B1 (de)

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US7265745B1 (en) * 2000-04-27 2007-09-04 Intel Corporation Compact alphanumeric keyboard
BR0111232A (pt) * 2000-05-22 2004-07-27 Digit Wireless Llc Dispositivos de entrada e seu uso
CA2412243C (en) * 2001-11-23 2007-03-20 Research In Motion Limited Keyboard assembly for a mobile device
US7126498B2 (en) * 2002-02-27 2006-10-24 Digit Wireless, Llc Keypad construction
PT1509938E (pt) * 2002-05-23 2006-07-31 Digit Wireless Llc Bloco de teclas e interruptores de teclas
JP2005538456A (ja) * 2002-09-09 2005-12-15 デジット ワイヤレス，エルエルシー キーボードの改良
DE10257070B4 (de) * 2002-12-06 2004-09-16 Schott Glas Verfahren zur automatischen Bestimmung einer gültigen oder ungültigen Tasteneingabe
US7218247B2 (en) * 2003-08-21 2007-05-15 Chiou-Haun Lee Brief numerical keypad and its output method
US7953448B2 (en) * 2006-05-31 2011-05-31 Research In Motion Limited Keyboard for mobile device
US20060291936A1 (en) * 2005-06-28 2006-12-28 Perez Suni V Resource expander key
US8183478B2 (en) 2009-10-26 2012-05-22 Research In Motion Limited Key assembly for an electronic device having a connected keycap
FR2953037A1 (fr) * 2009-11-26 2011-05-27 Jean Loup Claude Gillot Clavier plat, mecanique et tactile
FR2955423A1 (fr) * 2010-01-21 2011-07-22 Gillot Jean Loup Claude Clavier mecanique et tactile
FR2964760B1 (fr) * 2010-09-15 2013-03-08 Jean Loup Claude Gillot Clavier plat dote a la fois de proprietes mecaniques et tactiles

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DE2729157C2 (de) * 1977-06-28 1984-10-18 Hans Widmaier Fabrik für Apparate der Fernmelde- und Feinwerktechnik, 8000 München Tastenanordnung zur Auslösung bestimmten Symbolen der Tastenoberfläche jeweils zugeordneter Schaltfunktionen oder Schaltsignale
DE8302660U1 (de) * 1983-02-01 1983-06-16 Hans Widmaier Fabrik Fuer Apparate Der Fernmelde- Und Feinwerktechnik, 8000 Muenchen Tastenanordnung zur Auslösung von bestimmten Symbolen der Tastenoberfläche jeweils zugeordneten Schaltfunktionen oder Schaltsignalen.
US4566078A (en) * 1983-03-30 1986-01-21 International Business Machines Corp. Concurrent multi-lingual use in data processing systems
NL186072C (nl) * 1987-06-30 1990-09-17 Ava Consult Bv Toetsenbord voor een woordschrijfmachine.
US5528235A (en) * 1991-09-03 1996-06-18 Edward D. Lin Multi-status multi-function data processing key and key array
US5612690A (en) * 1993-06-03 1997-03-18 Levy; David Compact keypad system and method

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Publication number Publication date
FR2748345B1 (fr) 1998-07-17
FR2748345A1 (fr) 1997-11-07
EP0805465A1 (de) 1997-11-05
US5861588A (en) 1999-01-19
DE69702808D1 (de) 2000-09-21
DE69702808T2 (de) 2001-02-22

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