EP0396963B1 - Auswechselbares kodiertes Tastenfeld, welches alternierend befestbar ist an eine vom Benutzer konfigurierbare Tastatur zur Realisierung programmierbarer Tastaturfunktionen - Google Patents

Auswechselbares kodiertes Tastenfeld, welches alternierend befestbar ist an eine vom Benutzer konfigurierbare Tastatur zur Realisierung programmierbarer Tastaturfunktionen Download PDF

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Publication number
EP0396963B1
EP0396963B1 EP19900107849 EP90107849A EP0396963B1 EP 0396963 B1 EP0396963 B1 EP 0396963B1 EP 19900107849 EP19900107849 EP 19900107849 EP 90107849 A EP90107849 A EP 90107849A EP 0396963 B1 EP0396963 B1 EP 0396963B1
Authority
EP
European Patent Office
Prior art keywords
key
pad assembly
interchangeable
panel
key pad
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
EP19900107849
Other languages
English (en)
French (fr)
Other versions
EP0396963A2 (de
EP0396963A3 (de
Inventor
Thomas W. Finkle
Ralph M. Swanson
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0396963A2 publication Critical patent/EP0396963A2/de
Publication of EP0396963A3 publication Critical patent/EP0396963A3/de
Application granted granted Critical
Publication of EP0396963B1 publication Critical patent/EP0396963B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/066—Actuators replaceable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/01—Mounting on appliance
    • H01H2223/012—Snap mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/01—Mounting on appliance
    • H01H2223/014—Mounting on appliance located in recess
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/01—Mounting on appliance
    • H01H2223/028—Mounting on appliance detachable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/056—Keyboard or overlay identification features

Definitions

  • This invention relates to keyboards and, more particularly, to interchangeable key pad assemblies for providing at least a portion of a user keyboard.
  • one embodiment of the invention provides interchangeable key pad assemblies that are coded so that when they are alternately installed on a keyboard, one of a variety of programmable sets of keyboard functions is enabled for selection by user actuation of the keys.
  • One exemplary use of the invention is in association with molded rubber keyboards. Molded rubber keyboards have been used in combination with underlying printed circuit boards to provide a keyboard structure much less expensive than those where each key requires a separate push button member separately mounted in a frame.
  • Molded rubber keyboards usually comprise a rubber sheet integral with upwardly projecting rubber keys. Each rubber key is located above a recess in the sheet and its lower end includes such means as conductive rubber members for closing the switch contacts on the printed circuit board located directly below it.
  • the recesses form a diaphragm which acts to space the conductive rubber members above the printed circuit board, except when a particular key is pressed.
  • a keyboard assembly which has a printed circuit board providing a series of switch contacts and a molded rubber keyboard providing a rubber base sheet overlying the printed circuit board and having a series of rubber keys integral with the base sheet.
  • Each key has contacts on its bottom surface for closing each of the switch contacts when its key is depressed.
  • Stabilizing membranes prevent the keys from wobbling or binding. Although undesirable wobbling or binding is substantially eliminated, the keyboard is either a dedicated keyboard or one whose key functions are determined by the system to which the keyboard is mounted.
  • US-A-4 020 328 discloses an auxiliary keyboard apparatus that comprises a removable keyboard which has no structure for automatic configuration of the system. That is, this auxiliary keyboard apparatus is not coded. Therefore, this auxiliary keyboard apparatus requires manual data entry to an associated processor in order to identify different keyboards.
  • US-A-4 626 830 discloses a membrane keyboard in which there does exist a structure for keyboard coding.
  • the membrane keyboard comprises conductive traces between first and third pin positions and second and third pin positions, respectively, on the membrane. That is, the membrane keyboard disclosed in US-A-4 626 830 comprises a hard-wired coding structure integral with the membrane itself to effect direct electrical contact between the first and third pin positions and/or the second and third positions for keyboard coding.
  • DE-A-27 23 736 discloses a keyboard having an array of switches and an exchangeable cover plate.
  • the cover plate extends over a part of the switches to prevent an actuation of those switches which are not required for a specific keyboard function.
  • overlays have been used to provide the user with identification of key functions for programmable or customizable key sets. Overlays are commonly used on computer keyboards and calculators.
  • the typical overlay construction is a thin plastic sheet with screen-printed information. This material is not very durable and can be easily damaged.
  • overlays typically are not securely attached to the computer keyboards and calculators. Consequently, they are easily dislodged and slide from the keyboard, frustrating the user. Also, the functions of the keys are dedicated or determined by the computer or calculator since the overlay does not operatively interact with the system.
  • the invention is based on the object of providing a custom key panel which allows the key functions to be tailored to a desired mode of operation.
  • One embodiment of the present invention provides interchangeable key pad assemblies that are coded so that when they are alternately installed on a keyboard, one of a variety of programmable sets of keyboard functions is enabled for selection by user actuation of the keys.
  • Each key pad assembly has a durable construction and is securely attachable to the remainder of the keyboard.
  • Each key pad assembly is installed on the remainder of the keyboard and interfaces with the system with which the keyboard interacts, preferably a programmable system, to provide a custom key panel for the user so that key functions can be tailored to a desired selection of operations available to the user upon actuation of the keys.
  • the custom key panel in accordance with the invention is less prone to damage than an overlay, is securely attached, and imparts flexibility to the mechanical configuration of keys.
  • the flexibility in configuration provides the user only the necessary function keys for the particular application. This provides a less cluttered panel for an improved human interface.
  • the custom key panel in accordance with the invention is an assembly of parts that preferably allows an interchangeable key pad assembly to be associated with system keyboard means to provide one of a variety of sets of key functions available to the user.
  • the custom key panel provides direct execution of commands that typically are most frequently selected by the user.
  • the custom key panel does not make an electrical connection when plugged in. It mechanically actuates switches for addressing a processor in the system with a unique identification code for each interchangeable assembly. This provides a very reliable system.
  • the custom key panel 10 preferably comprises switch means 12 in the form of user selectable key means 14 and actuable key decoding means 16.
  • the custom key panel 10 also preferably comprises key means 18 selectively mountable in relation to the switch means 12 for actuating the switch means.
  • the key means 18 preferably comprises mechanical switch actuating means comprising at least one key 20 which is selectively actuable by the user.
  • the key means 18 also comprises key encoding means 22 which actuates the key decoding means 16 when the key means is mounted in relation to the switch means 12 for identifying the function selectable by the user when at least one key 20 is actuated by the user.
  • the switches 14 and 16 are preferably conductive rubber members 24 or pellets compression molded into a sheet 26 of non-conductive rubber, forming the keypad or matrix of switches.
  • the conductive members 24 are held above traces 28 on a printed circuit board 30 by the non-conductive rubber sheet 26. When a switch 14 or 16 is depressed, the conductive member 24 shorts the traces for that location and is acknowledged by the processor as a closed switch.
  • the six address switches are arranged in the same matrix as hole locations on a subpanel 32 of the custom key panel assembly.
  • the subpanel 32 can hold down an address switch 16 (ensuring closure) when there is no hole.
  • each address switch 16 allows overtravel or compression of the rubber actuator without exerting excessive force on the assembly. This ensures switch closure under worst case tolerance stack-up and bowing of the subpanel 32 and the keyboard.
  • the address switches 16 preferably have a small travel of 0.5 mm to closure, then a large overtravel of 3.0 mm.
  • the travel of standard key switches is typically 1.7 mm with no overtravel.
  • the custom key panel 10 preferably allows an interchangeable key pad assembly 18 to be plugged into a front bezel 40 of an electronic instrument, such as the HP 70004A modular measurement system display/mainframe, to provide one of a variety of sets of key functions available to the user.
  • the key pad assembly 18 is preferably retained in the bezel 40 by a mechanical spring 42.
  • the spring 42 is installed from the backside of the bezel 40 and is retained by the key pad.
  • the spring 42 latches over the edge of the subpanel 32 to retain the right side of the assembly.
  • the left side is sandwiched around a shelf 44 in the bezel 40.
  • the key pad assembly 18 is installed by aligning the left side to the shelf 44 on the bezel 40, then rotating the assembly around the shelf like a hinge until the spring 42 latches. The operation is similar to closing a door.
  • an opening 46 is provided in the front panel to insert a tool, such as a screwdriver blade.
  • a tool such as a screwdriver blade.
  • the spring 42 is forced away from the subpanel 32, which disengages the key pad assembly 18.
  • the key pad assembly 18 is then forced away from the key pad by another portion of the spring, and any residual force from the depressed address switches 16.
  • the key pad assembly 18 comes to rest at a sufficient distance away from the bezel 40 to provide finger clearance to grab the key pad assembly 18 for removal.
  • the key pad assembly 18 preferably utilizes conventional keycaps 50.
  • the keycaps 50 are typically double shot injection molded keys with nomenclature integral to the keycap. Each keycap presses onto an adapter 52 allowing the keycap to function in the key pad assembly 18.
  • Designers of custom key panels can modify these tools to create unique keycaps for each application.
  • the front panel can be screen-printed to provide any required identification of the key functions.
  • the keycaps are preferably captivated and can not fall out. This is accomplished by providing the subpanel 32 with apertures 60 into which the keycaps 50 connected to the adapters 52 are deposited. A front panel 62 having apertures 64 is then placed over the subpanel 32 and the keycaps 50 so that the apertures 64 align with the keycaps.
  • the front panel 62 also includes welded studs 66 in which are fitted spacers 68. The studs 66 extend through holes 70 in the subpanel 32, and nuts 72 are threaded on the studs to hold the key pad assembly 18 together.
  • the key pad assembly is rugged and durable enough to withstand damage during abusive handling outside of the instrument.
  • This invention has many advantages beyond what overlays can offer. Where flexibility, reliability, durability, and optimized human interface are desired, this invention is an ideal solution. There are numerous applications that can benefit from using a custom key panel in accordance with the present invention.
  • the address switches can be replaced by electrical address coding means, such as a diode matrix or read only memory.

Landscapes

  • Input From Keyboards Or The Like (AREA)
  • Push-Button Switches (AREA)

Claims (10)

  1. Ein kundenspezifisches Tastenbedienfeld (10), das durch eine aus einer Mehrzahl von austauschbaren Tastenfeldanordnungen konfiguriert ist, mit folgenden Merkmalen:
    einer gedruckten Schaltungsplatine (30) mit einer Mehrzahl von Sätzen von leitfähigen Elementen (28), die auf der Oberfläche eines dielektrischen Materials angebracht sind;
    einer elastomerischen Schicht (26) mit einer Mehrzahl von Aussparungen, die gegenüber der Mehrzahl von Sätzen von leitfähigen Elementen (28) der gedruckten Schaltungsplatine (30) positioniert sind;
    einer Mehrzahl von elastomerischen Tasten (14, 16), die ausgerichtet zu der Mehrzahl von Aussparungen in der Schicht (26) und in einem Abstand von der gedruckten Schaltungsplatine (30) positioniert sind, wobei jede Taste ein leitfähiges Bauglied (24) zum Schließen des Satzes der leitfähigen Elemente (28) auf der gedruckten Schaltungsplatine (30) ausgerichtet mit der Taste (14, 16) aufweist;
    wobei jede Aussparung eine Membran bildet, die wirkt, um jedes zugeordnete leitfähige Bauglied (24) über jedem Satz von leitfähigen Elementen (28) auf der gedruckten Schaltungsplatine (30) ausgerichtet mit der Aussparung zu beabstanden, es sei denn, daß eine spezielle elastomerische Taste (14, 16) gedrückt wird;
    wobei die Mehrzahl von elastomerischen Tasten (14, 16) eine Schalteinrichtung (12) bilden, die a) eine Benutzer-betätigbare Einrichtung (20, 50, 52, 14) und b) eine betätigbare Tastendecodiereinrichtung (16) aufweist, wobei die betätigbare Tastendecodiereinrichtung (16) zur Betätigung durch Koppeln einer austauschbaren Tastenfeldanordnung (18) mit der Mehrzahl von elastomerischen Tasten (14, 16) angeordnet ist; und
    wobei die austauschbare Tastenfeldanordnung (18), die dem kundenspezifischen Tastenbedienfeld (10) zugeordnet ist, folgende Merkmale aufweist:
    eine Frontplatte (62);
    eine Unterplatte (32);
    wobei mindestens eine Taste (20) durch die Frontplatte (62) vorsteht und selektiv durch den Benutzer betätigbar ist, um die Benutzer-betätigbare Einrichtung (20, 50, 52, 14) zu betätigen, nachdem die austauschbare Tastenfeldanordnung (18) mit der Schalteinrichtung (12) gekoppelt ist; und
    eine Tastencodiereinrichtung (22), die von der mindestens einen Taste (20) unabhängig ist, zum Betätigen der Tastendecodiereinrichtung (16), wenn die austauschbare Tastenfeldanordnung (18) mit der Mehrzahl von elastomerischen Tasten (14, 16) gekoppelt ist;
    wodurch die austauschbare Tastenfeldanordnung (18), wenn dieselbe dem kundenspezifischen Tastenbedienfeld (10) zugeordnet ist, einen Satz aus einer Mehrzahl von Sätzen von Tastenfunktionen schafft, die für den Benutzer verfügbar sind.
  2. Das kundenspezifische Tastenbedienfeld (10) gemäß Anspruch 1, wobei die austauschbare Tastenfeldanordnung (18) konfiguriert ist, um keine elektrische Verbindung herzustellen, wenn dieselbe in das kundenspezifische Tastenbedienfeld (10) eingesteckt ist, sondern Schalter (16) mechanisch betätigt, um den externen Prozessor mit einem einzigartigen Identifikationscode für die Tastenfeldanordnung (18) zu adressieren.
  3. Das kundenspezifische Tastenbedienfeld (10) gemäß Anspruch 1, das ferner einen Federhalter (42) aufweist, der dem kundenspezifischen Tastenbedienfeld (10) zugeordnet ist, um die austauschbare Tastenfeldanordnung (18) in dem kundenspezifischen Tastenbedienfeld (10) einzubauen.
  4. Das kundenspezifische Tastenbedienfeld (10) gemäß Anspruch 1, bei dem die mindestens eine Taste (20) einen Tastenadapter (52) aufweist, um zu ermöglichen, daß eine herkömmliche Taste in die austauschbare Tastenbedienfeldanordnung (18) aufgenommen werden kann.
  5. Das kundenspezifische Tastenbedienfeld (10) gemäß Anspruch 1, bei dem die Schalteinrichtung (12) ferner folgende Merkmale aufweist:
    eine Frontrahmeneinrichtung (40);
    die gedruckte Schaltungsplatine (30), die auf der Frontrahmeneinrichtung (40) befestigt ist;
    die elastomerische Schicht (26), die an der Frontrahmeneinrichtung (40) befestigt ist, die über der gedruckten Schaltungsplatine (30) liegt; und wobei die austauschbare Tastenfeldanordnung (18) in die Frontrahmeneinrichtung (40) eingesteckt wird, um einen Satz aus einer Mehrzahl von Sätzen von Tastenfunktionen zu schaffen, die für den Benutzer verfügbar sind.
  6. Das kundenspezifische Tastenbedienfeld (10) gemäß Anspruch 5, bei dem die austauschbare Tastenfeldanordnung (18) durch eine mechanische Feder (42) in der Frontrahmeneinrichtung (40) gehalten wird.
  7. Das kundenspezifische Tastenbedienfeld (10) gemäß Anspruch 6, bei dem die Frontrahmeneinrichtung (40) ein Gestell (44) aufweist und die austauschbare Tastenfeldanordnung (18) folgende Merkmale aufweist:
    eine erste Seite, wobei die erste Seite der austauschbaren Tastenfeldanordnung (18) Sandwich-artig um das Gestell (44) der Frontrahmeneinrichtung (40) angeordnet ist; und
    eine zweite Seite, wobei die mechanische Feder (42) über die zweite Seite der austauschbaren Tastenfeldanordnung (18) verriegelt ist, um die austauschbare Tastenfeldanordnung (18) zu halten.
  8. Das kundenspezifische Tastenbedienfeld (10) gemäß Anspruch 6 oder 7, bei dem die austauschbare Tastenfeldanordnung (18) ferner folgendes Merkmal aufweist:
    eine Öffnung (46), die über der mechanischen Feder (42) liegt, wenn die austauschbare Tastenfeldanordnung in der Frontrahmeneinrichtung (40) eingebaut ist, wobei die Öffnung (46) zum Einsetzen eines Werkzeugs angepaßt ist, um die Feder (42) aus dem Eingriff mit der austauschbaren Tastenfeldanordnung (18) zu nehmen, um die Tastenfeldanordnung (18) aus dem Eingriff zu nehmen.
  9. Das kundenspezifische Tastenbedienfeld (10) gemäß Anspruch 1, bei dem sechs binäre Tastencodiereinrichtungen (22) in der Form von abwechselnd nicht entspannten und entspannten Abschnitten der austauschbaren Tastenfeldanordnung (18) existieren.
  10. Das kundenspezifische Tastenbedienfeld (10) gemäß Anspruch 1, bei dem
    die Unterplatte (32) mindestens eine Öffnung (60) aufweist, in welche die mindestens eine Taste (20) abgelegt ist;
    die Frontplatte (62) mindestens eine Öffnung (64) aufweist, wobei die Frontplatte (62) über der Unterplatte (32) und der mindestens einen Taste (20) derart plaziert ist, daß die mindestens eine Öffnung (64) in der Frontplatte (62) mit der mindestens einen Taste (20) und der mindestens einen Öffnung (60) in der Unterplatte (32) ausgerichtet ist;
    und wobei die austauschbare Tastenfeldanordnung (18) ferner folgende Merkmale aufweist:
    Stifte (66), die auf der Frontplatte (62) befestigt sind;
    Abstandshalter (68), die auf den Stifte (66) befestigt sind, wobei sich die Stifte (66) durch Löcher in der Unterplatte (32) erstrecken; und
    Muttern (72), die gewindemäßig auf die Stifte (66) gedreht sind, um die mindestens eine Taste (20) zwischen der Unterplatte (32) und der Frontplatte (62) Sandwich-artig zu halten.
EP19900107849 1989-05-08 1990-04-25 Auswechselbares kodiertes Tastenfeld, welches alternierend befestbar ist an eine vom Benutzer konfigurierbare Tastatur zur Realisierung programmierbarer Tastaturfunktionen Expired - Lifetime EP0396963B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34882689A 1989-05-08 1989-05-08
US348826 1989-05-08

Publications (3)

Publication Number Publication Date
EP0396963A2 EP0396963A2 (de) 1990-11-14
EP0396963A3 EP0396963A3 (de) 1992-04-29
EP0396963B1 true EP0396963B1 (de) 1996-03-06

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Application Number Title Priority Date Filing Date
EP19900107849 Expired - Lifetime EP0396963B1 (de) 1989-05-08 1990-04-25 Auswechselbares kodiertes Tastenfeld, welches alternierend befestbar ist an eine vom Benutzer konfigurierbare Tastatur zur Realisierung programmierbarer Tastaturfunktionen

Country Status (3)

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EP (1) EP0396963B1 (de)
JP (1) JPH0315127A (de)
DE (1) DE69025641T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0397062A3 (de) * 1989-05-06 1991-12-27 Deutsche Airbus GmbH Einrichtung zum Schutz elektrischer Anlagen
US6144732A (en) * 1998-04-27 2000-11-07 Teledex Corporation Telephone case with easily reconfigured pushbutton keys
US7911200B2 (en) 2007-08-14 2011-03-22 Fluke Corporation Digital multimeter having case panel structure
JP4849649B1 (ja) * 2010-07-30 2012-01-11 川上産業株式会社 気泡シートからなる、印刷が施された、曲線形状の溶着面を有する、又は縫製によって成形された製品

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020328A (en) * 1975-12-16 1977-04-26 Ncr Corporation Auxiliary keyboard apparatus
US4066850A (en) * 1976-06-04 1978-01-03 Ncr Corporation Keyboard switch assembly having interchangeable cover plate, indicating layer and actuator switch assembly in any operative combination
DE8336889U1 (de) * 1983-12-22 1984-03-29 Siemens AG, 1000 Berlin und 8000 München Tastatur
US4626830A (en) * 1984-06-18 1986-12-02 Motorola, Inc. Membrane keyboard with identifying connectors

Also Published As

Publication number Publication date
JPH0315127A (ja) 1991-01-23
EP0396963A2 (de) 1990-11-14
DE69025641D1 (de) 1996-04-11
DE69025641T2 (de) 1996-07-18
EP0396963A3 (de) 1992-04-29

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