EP0074315A2 - Hermetically sealed, modular, tactile keyboard - Google Patents

Hermetically sealed, modular, tactile keyboard Download PDF

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Publication number
EP0074315A2
EP0074315A2 EP82401609A EP82401609A EP0074315A2 EP 0074315 A2 EP0074315 A2 EP 0074315A2 EP 82401609 A EP82401609 A EP 82401609A EP 82401609 A EP82401609 A EP 82401609A EP 0074315 A2 EP0074315 A2 EP 0074315A2
Authority
EP
European Patent Office
Prior art keywords
keyboard
housing
membrane
key
keys
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
EP82401609A
Other languages
German (de)
French (fr)
Other versions
EP0074315B1 (en
EP0074315A3 (en
Inventor
Rémy Bacon
Gérard Juery
Michel Naulin
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.)
Telemecanique SA
Original Assignee
Telemecanique Electrique 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
Priority to FR8116623 priority Critical
Priority to FR818116623A priority patent/FR2511941B1/en
Application filed by Telemecanique Electrique SA filed Critical Telemecanique Electrique SA
Publication of EP0074315A2 publication Critical patent/EP0074315A2/en
Publication of EP0074315A3 publication Critical patent/EP0074315A3/en
Application granted granted Critical
Publication of EP0074315B1 publication Critical patent/EP0074315B1/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J5/00Devices or arrangements for controlling character selection
    • B41J5/08Character or syllable selected by means of keys or keyboards of the typewriter type
    • B41J5/12Construction of key buttons
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70Switches 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
    • H01H13/7006Switches 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 comprising a separate movable contact element for each switch site, all other elements being integrated in layers
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00Layers
    • H01H2209/014Layers composed of different layers; Lubricant in between
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00Tactile feedback
    • H01H2215/004Collapsible dome or bubble
    • H01H2215/008Part of substrate or membrane
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00Tactile feedback
    • H01H2215/034Separate snap action
    • H01H2215/036Metallic disc
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00Legends
    • H01H2219/002Legends replaceable; adaptable
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00Legends
    • H01H2219/002Legends replaceable; adaptable
    • H01H2219/014LED
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00Actuators
    • H01H2221/024Transmission element
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00Actuators
    • H01H2221/066Actuators replaceable
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00Casings
    • H01H2223/03Separate key housing
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00Manufacturing
    • H01H2229/022Modular assembly
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00Manufacturing
    • H01H2229/042Snap coupling; Snap mounting

Abstract

The keyboard comprises a printed circuit (4) constituting an electrical connection and support means for a modular honeycomb spacer (3) comprising a plurality of square shaped aveoli (30), defined by partitions (31) and arranged according to rows and columns, contact modules (7) or indicator modules mounted on the printed circuit in the cells of the spacer, a waterproof and elastic membrane (1) integral with the spacer, keys cooperating with the modules contact by means of the portion of the keys external to said membrane, on which the finger acts, and means (105 FIG. 5, 9 FIG. 2) for achieving a tactile effect by rapid tilting.

Description

  • The subject of the invention is a waterproof modular keyboard with a tactile effect.
  • It is particularly applicable to short stroke keyboards for numerically controlled machines, programmable logic controllers, typewriters and word processors.
  • It is known, in order to produce thin waterproof keyboards and at low cost, to deposit by screen printing a conductive ink on one side of a plastic sheet, the other side of which contains the inscriptions corresponding to the characters, to start depositing again. conductive ink on one side of another flexible plastic sheet, to join the two sheets together so that the two faces covered with conductive ink meet face to face, separated by a thin film of air of a few tenths of millimeter. In this way, a thin, waterproof keyboard is obtained, which can be easily cleaned, but whose reliability is unacceptable for use on industrial products.
  • In addition, this type of keyboard has the major drawback of not having a stroke allowing the operator to realize without display means, by simple tactile sensation, if his action has been taken into account by the machine connected to the keyboard.
  • There are also reliable and robust keyboards of the typewriter type with mobile keys having large strokes of the order of 4 mm and making it possible to realize without means of visualization, by simple tactile sensation, that the key has been pressed. . However, these keyboards, because of their large stroke, are not waterproof and easy to maintain.
  • The invention combines the advantages of these different keyboards, while eliminating their respective drawbacks.
  • The invention enables a reliable, waterproof, easy-to-maintain, robust, modular keyboard to be produced at low cost.
  • According to the invention the keyboard comprises a printed circuit 4 constituting an electrical connection and support means for a modular honeycomb spacer 3 comprising a plurality of cells 30, of square shape, defined by partitions 31 and arranged in rows and columns, contact modules 7 or indicator modules mounted on the printed circuit in the cells of the spacer, a waterproof and elastic membrane 1 secured to the spacer, keys cooperating with the contact modules by means of the portion keys above said membrane on which the finger acts and means 105 FIG. 5, 9 FIG. 2 to achieve a tactile effect by rapid tilting.
  • Other features and advantages of the invention will become apparent in the light of the detailed description below.
  • In the accompanying drawings:
    • Figure 1 is a top view of a keyboard resting via a membrane on an associated modular spacer.
    • Figure 2 is a sectional view of a first embodiment of the keyboard.
    • Figure 3 is a sectional view of a contact module.
    • Figure 4 is a top view of the contact module.
    • Figure 5 is a sectional view of a second embodiment of the keyboard.
    • Figure 6 is a sectional view of a double button.
    • Figure 7 is a sectional view of a single key using another embodiment of a modular and waterproof membrane.
    • Figure 8 is a top view of a button with indicator.
    • Figure 9 is a diagonal sectional view of the same button with indicator.
    • Figure 10 is a sectional view of a fixed indicator.
    • Figure 11 is a perspective view of the sealing membrane.
    • Figure 12 is a perspective view of a first method of mounting the button on the membrane.
    • Figure 13 is a perspective view of a second method of mounting the button.
    • Figure 14 is a sectional view of a second embodiment of the membrane used with the second method of mounting the button.
  • FIG. 1 represents a set of keys 8 resting on a membrane 1 partially removed to reveal a spacer 3 on which the key-membrane assembly rests. This modular honeycomb spacer 3 obtained by molding comprises a plurality of cells 30 arranged in rows and columns. This plurality of housings or cells of square shape are defined by partition walls 31 comprising pre-cutouts 32 so as to modify the dimension of a cell and to obtain cells having several modules of length. In these housings or cells, contact modules or indicator modules are available depending on the type of keyboard that one wishes to make and, in cooperation with these contact modules, square keys with alphanumeric characters or other signs corresponding to the keyboard that we want to achieve. Depending on the type of keyboard that one wishes to achieve, all or part of the modular honeycomb spacer is used.
  • As we will see later, the use of this spacer in combination with the modular elements constituting a keyboard makes it possible to obtain keyboards easily adaptable to demand.
  • FIG. 2 is a sectional view of a first embodiment of a waterproof short-stroke keyboard, in which a printed circuit 4 serves as a means of electrical connection with an apparatus and the keyboard, and as support for a plurality of contact modules 7 arranged on the circuit according to adequate spacings and secured to the printed circuit by solder points also making the electrical connections between the pins 77, 78 of the module and the printed circuit.
  • Holes 40 provided at suitable locations in the printed circuit allow a modular spacer 3 made of thermoplastic, formed by partitions arranged so as to delimit a succession of square cells arranged in a matrix network, by crimping or by screw. come to house the contact modules.
  • A notch 39 is provided on the periphery of each housing formed by four partitions, to allow the mounting of a dome 9 constituted by a curved sheet, of elastic metal, cut according to the shape of a housing.
  • A flat and waterproof membrane 1 made of transparent polyurethane is glued or welded over the entire surface formed by the partitions of the spacer. On this membrane is applied another interchangeable membrane 2 consisting of a sheet of mylar or polycarbonate which comprises, as required, opaque areas or transparent areas. On this interchangeable membrane are reported by gluing or ultrasonic welding of the keys 8, in thermoplastic or any other similar material, bearing the desired alphanumeric inscriptions for the keyboard.
  • In certain housings of the spacer, a contact module is replaced by an indicator module constituted by an electroluminescent diode 6 mounted in a support 5 and connected to the printed circuit by soldering. Four angles 13 are arranged at the periphery of the printed circuit and secured to the latter to stiffen the entire structure.
  • Figures 3 and 4 show a contact module used in the keyboard of Figure 1 or 5, comprising a polycarbonate housing 74 of circular shape provided with two holes in the bottom of the housing to allow passage of two pins 77, 78 of material conductor, fitted with contact heads. The bottom of the housing also includes two bosses 70, 71 FIG. 4. A contact blade 75, constituted by a thin sheet of conductive material, comes to rest in the housing bearing on the bosses 70, 71 and the pin 77 so that at rest the electrical connection between the pins 77 and 78 is not established, while in the working position it will be established. A thin waterproof polycarbonate film constituting a membrane 76 is glued or welded to the housing 74.
  • This type of contact module, used for keyboards of the type in FIG. 2 or in FIG. 5, has the advantage of not having a tactile effect due to the passage of a hard point. This contact module therefore avoids superimposing a tactile effect due to the module, to the tactile effect of the dome 9 of FIG. 2 or of the boss 105 of FIG. 5.
  • The housing 74 has on its periphery a circular rib 79.
  • In operation when the operator presses a key on the keyboard, the membranes 1 and 2 deform, the dome 9 flexes up to a certain limit while opposing an increasing resistance force until the moment when it suddenly switches to the position shown in dotted lines to act on the membrane of the contact module and bring the contact blade 75 into contact with the pins 77 and 78. The sudden tilting of the blade provides a tactile effect which allows the operator to feel that his action has been taken into account. The membrane 1 seals the keyboard while the membrane 2 with the keys allows the adaptation of the configuration of the keyboard to demand and its interchangeability. A waterproof modular keyboard with an interchangeable front face and a tactile effect has thus been created. This keyboard will be mounted against the internal face of the housing 12 of the device of which it is a part so that the seal between the housing and the keyboard is achieved by tightening the membrane 1. The holding in place of the membrane 2 is secured by another means, clamp or clip.
  • FIG. 5 represents another embodiment of a waterproof modular keyboard with tactile effect and with a greater stroke than the previous one, in which there is a support constituted by a printed circuit 4, on which contact modules 7 have been mounted at the locations corresponding to the housings of a modular spacer 3 which are fixed on the printed circuit by means of screws 22 for example. The modular spacer 3 can also be fixed to the printed circuit by crimping or any other fixing means. This modular spacer 3 comprises, like the previous spacer, partitions 31 separating the housings from the pre-cutouts 32 for detaching several partitions and obtaining housings with dimensions adapted to the keys and in addition to the housing covers 33 connected to the partitions delimiting the housing, by a thin veil 34 allowing by pressing on the cover to detach the cover from the grid and to obtain an opening at the location chosen to place a button 30. The partitions of the grid have a flat lower face in contact with the circuit printed, an upper face in which a longitudinal groove 35 is formed and two lateral faces each comprising a vertical portion 36 and an inclined portion 37 forming with the vertical portion 36 a shoulder 38.
  • The face of the covers, outside the housings, is in a plane parallel to the plane in which the upper faces of the partitions are situated.
  • A membrane 1 made of polyurethane or any other elastic and waterproof material that can be easily molded has bosses 100 in the form of a trunk of pyramid 105 with a square base, the upper base of which cooperates with a key or rests on the upper face of the associated cover in the case where there is no key, and whose lower base is secured to the spacer by longitudinal and transverse ribs 101 which are fixed in the grooves 35 of the spacer 3 by gluing, crimping, welding or any other suitable means .
  • The upper base of the membrane boss has a bead 102 sealing with the key 8 which is mounted on this upper base after having made a cruciform notch 107 in the membrane, as shown in Figures 11 and 12 to allow the passage of the latching head 84 of the key 8 with the assembly part 11, comprising a collar 110 which limits the movement of the part 11 coming into abutment against the shoulder 38. The collar also cooperates with the vertical faces 36 of the partitions closing the housing to form a means for guiding the button when the latter is moves vertically.
  • Thus by removing the covers of the housings where one wishes to put keys and by mounting the keys that one desires in the desired locations one obtains a waterproof keyboard which from modular elements can have the arrangement and the number of keys that the we wish.
  • The seal between the keyboard and the housing 12 of the device using the keyboard is ensured by tightening the membrane against the housing 12 for example by means of a device such as that shown in FIG. 5 comprising a nut 122 welded to the housing, a flange 120 and a screw 121.
  • In operation, when a key is pressed, the sides of the boss compress until the membrane suddenly takes the shape of the reverse pyramid as shown in FIG. 4, thus creating a tactile effect. In this second position, the key presses on the contact dome and establishes the electrical connection between the pins 77 and 78. As soon as the key is released, the membrane returns to its initial shape. In places where there is no key, the cover 33 supports the boss of the membrane and prevents the membrane from being pushed in. A keyboard is thus obtained allowing the operator to feel the operations carried out by touch.
  • FIG. 6 represents the production and mounting of a multiple key, for example a double key. For this, a double key 81 of length equal to twice the length of a single key plus the distance separating two adjacent keys is produced. This double button has two latching heads 84 which are mounted by means of two assembly parts 11 on the membrane integral with the grid 3 from which a intermediate partition where you want to mount the double button.
  • FIG. 7 shows a variant of the second method of mounting a unitary button with label housing. The partitions 31 of the spacer 3 do not have a shoulder 38 but have on their vertical parts 36 an extension 360 constituting a circular opening in which a contact module is fixed by snap-fastening of the rib 79 with a corresponding groove 361. The assembly part 11 does not have a collar but a guide surface 112 and is assembled by snap-fastening with the button 8 label holder, constituted in a manner known per se by a body 85 comprising in a housing 88 a label protector 85 made of material transparent and a label 87.
  • The body 85 of the key and the connecting part 11 after assembly, tighten, so as to seal between the key and the membrane, a bead 102 formed at the periphery of an opening obtained in the membrane in the way represented in FIGS. 13 and 14. A tongue 104 makes it possible to remove a piece of pre-cut membrane according to the pre-cut 103 of square shape and to obtain an opening 106 which allows the mounting of a key as shown in the figure 7.
  • FIG. 8 represents a top view of a square shaped button having in a corner of the button a transparent circular window 83 for an indicator and a label protector 86 of circular shape adapted to the shape of the finger.
  • FIG. 9 represents a diagonal section view of the button with indicator mounted on the keyboard in a housing comprising in addition to the contact module 7 a support 51 for light-emitting diode 6 mounted in an opening 41 made in the printed circuit. Assembly part 11 mounted in the housing has a skylight 111 opposite the diode and the transparent window provided on the button.
  • FIG. 10 shows the mounting of a fixed indicator in an opening provided for a key in which a support 51 for light-emitting diode 6 has been mounted on the printed circuit. A cabochon made of transparent material 23 of shape suitable for cutting out the membrane and comprising on its lateral faces 25 a groove 24 in which the bead 102 of the membrane is clamped by an internal collar 114 provided on the assembly part which just snaps onto the cap. An outer flange 113 and the lateral faces 25 prevent any movement of the cap relative to the grid. Thus thanks to these different modular elements, grids and membranes which have predetermined dimensions, it will be possible to produce watertight keyboards, with or without sight glass, and suitable for all types of application. It is obvious that in these different embodiments it will be possible to stiffen the structure by mounting an angle 13 on the printed circuit.
  • It goes without saying that various modifications can be made to the embodiments described and shown, without departing from the spirit of the invention.
  • It goes without saying that any modification within the reach of those skilled in the art and any combination of the different elements between them, are also part of the spirit of the invention.

Claims (12)

1. Keypad keyboard intended to be mounted in the housing of an apparatus and comprising: a printed circuit board serving as a support and connection means for a multiplicity of modular switches housed in housings, placed side by side and actuated each by a pusher guided axially to receive and transmit the displacements of a cooperating key, deformable means being associated with each key-switch-switch assembly to communicate a tactile sensation to the user,
characterized in that the guidance of each of said pushers (84) is ensured by an assembly part (11) sliding in a cell (30) which belongs to a flat spacer (3) and which surrounds the housing of the modular switch (7) corresponding, a deformable membrane (1) which receives on its opposite faces the pusher (84) and a key (8), being fixed on partitions (31) of the spacer, placed around this cell.
2. Keyboard according to claim 1, further comprising indicator modules (3) mounted on the printed circuit in other cells of the spacer, characterized in that said deformable means consist of a metal dome (9, Figure 2) placed in the cell between the switch and the deformable membrane (1), that said deformable membrane (1) is transparent, the keys (8, FIG. 2) are interchangeable and glued or welded onto an interchangeable sheet (2, Figure 2) which has transparent areas opposite the indicator modules (3) and opaque areas.
3. Keyboard according to claim 2,
characterized in that the deformable means consist of bosses in the form of a pyramid trunk (105) arranged on said deformable membrane (1) itself, said bosses having their lower base secured to the inter flat height rod (3) and their mobile upper base supporting keys (8, FIG. 5), said bosses being associated with mounting means (84, 11, 102) for sealing keys and guide means (110, 36 ) keys when moving.
4. Keyboard according to claim 3,
characterized in that the means for tightly fitting the keys consist of a bead (102) integral with the deformable membrane (1) clamped between a bearing surface of the key (8) and a bearing surface of a part assembly (11) fixed to the key by snap-fastening (84), said assembly part comprising a surface (110, 112) cooperating with the vertical faces of the partitions in order to guide the key in its movements.
5. Keyboard according to claim 4,
characterized in that the key comprises a circular housing (88), a label (87) placed in this housing and covered by a label protector (86) fitting in the housing.
6. Keyboard according to claim 5,
characterized in that the button is of substantially square shape and comprises in a corner a window (83) for sight glass.
7. Keyboard according to one of claims 1 to 6, characterized in that the bottom of the housing of each modular switch comprises two bosses (70, 71) and is crossed by two contact pins (77, 78), a blade metal contact (75) being disposed in abutment on the bosses (70, 71) and a membrane (76) covering the housing.
8. Keyboard according to claim 7,
characterized in that the external surface of said housing comprises a circular rib (79, FIG. 3) cooperating with a groove (361, FIG. 7) provided on the lateral faces (36) of the partitions of the housings.
9. Keyboard according to one of claims 2 to 8, characterized in that an indicator module comprises an electroluminescent diode (6) mounted on a support (5).
10. Keyboard according to claim 3,
characterized in that said deformable membrane (1) has pre-cut openings having the shape and substantially the size of the keys.
11. Keyboard according to claim 10,
characterized in that a sight glass (23) is mounted in an opening (106) in the membrane.
12. Keyboard according to one of claims 1 to 11, characterized in that said keyboard is mounted in a sealed manner in the housing of a device for use, by tightening the deformable membrane (1) against the internal face of the outer wall of the device housing.
EP82401609A 1981-09-01 1982-08-31 Hermetically sealed, modular, tactile keyboard Expired EP0074315B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR8116623 1981-09-01
FR818116623A FR2511941B1 (en) 1981-09-01 1981-09-01 Modular, waterproof, touchpad keyboard

Publications (3)

Publication Number Publication Date
EP0074315A2 true EP0074315A2 (en) 1983-03-16
EP0074315A3 EP0074315A3 (en) 1983-10-05
EP0074315B1 EP0074315B1 (en) 1986-06-04

Family

ID=9261822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401609A Expired EP0074315B1 (en) 1981-09-01 1982-08-31 Hermetically sealed, modular, tactile keyboard

Country Status (7)

Country Link
US (1) US4471189A (en)
EP (1) EP0074315B1 (en)
JP (1) JPH0373973B2 (en)
CA (1) CA1194962A (en)
DE (1) DE3271560D1 (en)
FR (1) FR2511941B1 (en)
NO (1) NO160633C (en)

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FR2562286A1 (en) * 1984-03-28 1985-10-04 Telemecanique Electrique Keyboard with multi-cell metal support plate
FR2562320A1 (en) * 1984-03-28 1985-10-04 Telemecanique Electrique Modular switch for computer system
FR2566574A1 (en) * 1984-06-26 1985-12-27 Tabur Caoutchouc Keyboard for control box of an electrical device
WO1986003053A1 (en) * 1984-11-09 1986-05-22 Marquardt Gmbh Electric component such as a keyboard or similar
FR2587833A1 (en) * 1985-09-21 1987-03-27 Rheinmetall Gmbh Multiple pushbutton switch panel for machine control
US4671688A (en) * 1985-10-02 1987-06-09 Honeywell Inc. Shielded keyboard
GB2269054A (en) * 1992-07-20 1994-01-26 Digitran Co Moisture-sealed switch assembly
EP0585536A1 (en) * 1992-09-02 1994-03-09 PROTO EL S.r.l. An anti-vandal hermetically sealed push-button panel
EP0657908A2 (en) * 1993-12-07 1995-06-14 AT&T Corp. Rubber dome/mylar switch
EP0729164A3 (en) * 1995-02-21 1998-03-18 Preh-Werke GmbH & Co. KG Keyboard with protection sheet
WO1998050930A1 (en) * 1997-05-07 1998-11-12 Marquardt Gmbh Switching arrangement
WO2015021560A1 (en) 2013-08-16 2015-02-19 Blackberry Limited Double pre-loaded deflection webs for keypad

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DE69133364T2 (en) * 1990-10-30 2004-12-09 Teikoku Tsushin Kogyo Co. Ltd., Kawasaki Method of making a button
US5080155A (en) * 1990-12-28 1992-01-14 Hooleon Corporation Keyboard enclosure
US5138119A (en) * 1991-03-15 1992-08-11 Lucas Duralith Corporation Backlit tactile keyboard with improved tactile and electrical characteristics
JPH04349316A (en) * 1991-05-24 1992-12-03 Matsushita Electric Ind Co Ltd Waterproof switch for electronic equipment
US5300742A (en) * 1992-09-23 1994-04-05 Huang Hai Long Waterproof structure for computer key switch
EP0685860A1 (en) * 1994-06-03 1995-12-06 Hewlett-Packard Company Full travel, sealed, fully backlighted keyboard
US5684513A (en) * 1995-07-17 1997-11-04 Decker; Mark Randall Electronic luminescence keyboard system for a portable device
US6215420B1 (en) * 1999-01-06 2001-04-10 Coach Master Int'l Corp. Keyboard (I)
JP2000215754A (en) * 1999-01-26 2000-08-04 Nec Shizuoka Ltd Operating button structure for electronic equipment
US6064019A (en) * 1999-04-27 2000-05-16 Buchan; Brian D. Resilient switch cover with integral actuator button
JP3773743B2 (en) * 2000-02-29 2006-05-10 三洋電機株式会社 Electric razor
US6962454B1 (en) 2000-04-04 2005-11-08 Costello Pamella A Keyboard protective cover
JP4460739B2 (en) * 2000-08-23 2010-05-12 ポリマテック株式会社 Film integrated key top
US6797902B2 (en) 2001-06-27 2004-09-28 Sotai Ltd. Illuminable computer keyboard
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US6635838B1 (en) 2002-06-24 2003-10-21 Brent A. Kornelson Switch actuating device and method of mounting same
US7057126B1 (en) * 2005-05-31 2006-06-06 Sunwave Technology Corp. Press button light emitting structure
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US20100232861A1 (en) * 2009-03-12 2010-09-16 Panasonic Corporation Protective sheet and input device
US8183478B2 (en) * 2009-10-26 2012-05-22 Research In Motion Limited Key assembly for an electronic device having a connected keycap
US8822858B2 (en) * 2011-02-09 2014-09-02 Apple Inc. Keyboard design
CN103681061A (en) * 2012-09-11 2014-03-26 罗技欧洲公司 Key frame module for flexible keyboard
CN103809681A (en) * 2012-11-15 2014-05-21 鸿富锦精密工业(深圳)有限公司 Electronic device drain structure
JP6669799B2 (en) * 2018-04-02 2020-03-18 レノボ・シンガポール・プライベート・リミテッド Keyboard device and electronic equipment

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FR2562286A1 (en) * 1984-03-28 1985-10-04 Telemecanique Electrique Keyboard with multi-cell metal support plate
FR2562320A1 (en) * 1984-03-28 1985-10-04 Telemecanique Electrique Modular switch for computer system
FR2566574A1 (en) * 1984-06-26 1985-12-27 Tabur Caoutchouc Keyboard for control box of an electrical device
WO1986000462A1 (en) * 1984-06-26 1986-01-16 Tabur Caoutchouc (Societe Anonyme) Keyboard for the control box of an electric apparatus
US4710597A (en) * 1984-06-26 1987-12-01 Tabur Caoutchouc Keyboard for the control box of an electric apparatus
AU582171B2 (en) * 1984-06-26 1989-03-16 Tabur Caoutchouc (Societe Anonyme) Keyboard for the control box of an electronic apparatus
WO1986003053A1 (en) * 1984-11-09 1986-05-22 Marquardt Gmbh Electric component such as a keyboard or similar
FR2587833A1 (en) * 1985-09-21 1987-03-27 Rheinmetall Gmbh Multiple pushbutton switch panel for machine control
US4671688A (en) * 1985-10-02 1987-06-09 Honeywell Inc. Shielded keyboard
GB2269054B (en) * 1992-07-20 1996-04-17 Digitran Co A key switch assembly
GB2269054A (en) * 1992-07-20 1994-01-26 Digitran Co Moisture-sealed switch assembly
EP0585536A1 (en) * 1992-09-02 1994-03-09 PROTO EL S.r.l. An anti-vandal hermetically sealed push-button panel
EP0657908A3 (en) * 1993-12-07 1997-04-02 At & T Corp Rubber dome/mylar switch.
EP0657908A2 (en) * 1993-12-07 1995-06-14 AT&T Corp. Rubber dome/mylar switch
EP0729164A3 (en) * 1995-02-21 1998-03-18 Preh-Werke GmbH & Co. KG Keyboard with protection sheet
WO1998050930A1 (en) * 1997-05-07 1998-11-12 Marquardt Gmbh Switching arrangement
US6204459B1 (en) 1997-05-07 2001-03-20 Marquardt Gmbh Switching arrangement
WO2015021560A1 (en) 2013-08-16 2015-02-19 Blackberry Limited Double pre-loaded deflection webs for keypad
CN105637606A (en) * 2013-08-16 2016-06-01 黑莓有限公司 Double pre-loaded deflection webs for keypad
EP3033759A4 (en) * 2013-08-16 2016-08-03 Blackberry Ltd Double pre-loaded deflection webs for keypad
US9823754B2 (en) 2013-08-16 2017-11-21 Blackberry Limited Method of forming a keypad assembly
CN105637606B (en) * 2013-08-16 2018-12-11 黑莓有限公司 Double preloadings of keypad deflect web

Also Published As

Publication number Publication date
CA1194962A1 (en)
FR2511941B1 (en) 1988-02-05
NO160633B (en) 1989-01-30
NO160633C (en) 1989-05-10
JPH0373973B2 (en) 1991-11-25
JPS5853120A (en) 1983-03-29
US4471189A (en) 1984-09-11
EP0074315A3 (en) 1983-10-05
DE3271560D1 (en) 1986-07-10
CA1194962A (en) 1985-10-08
EP0074315B1 (en) 1986-06-04
FR2511941A1 (en) 1983-03-04
NO822937L (en) 1983-03-02

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