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EP0671752B1 - Clavier - Google Patents

Clavier Download PDF

Info

Publication number
EP0671752B1
EP0671752B1 EP95101840A EP95101840A EP0671752B1 EP 0671752 B1 EP0671752 B1 EP 0671752B1 EP 95101840 A EP95101840 A EP 95101840A EP 95101840 A EP95101840 A EP 95101840A EP 0671752 B1 EP0671752 B1 EP 0671752B1
Authority
EP
European Patent Office
Prior art keywords
housing
keyboard
bottom tray
feet
reinforcing webs
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
EP95101840A
Other languages
German (de)
English (en)
Other versions
EP0671752A3 (fr
EP0671752A2 (fr
Inventor
Jörg DITTRICH
Günter Greiner
Karl-Heinz Müller
Klaus Schuster
Günter MURMANN
Kurt Michel
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.)
ZF Electronics GmbH
Original Assignee
Cherry Mikroschalter GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19944408331 external-priority patent/DE4408331A1/de
Priority claimed from DE19944442073 external-priority patent/DE4442073C2/de
Application filed by Cherry Mikroschalter GmbH filed Critical Cherry Mikroschalter GmbH
Publication of EP0671752A2 publication Critical patent/EP0671752A2/fr
Publication of EP0671752A3 publication Critical patent/EP0671752A3/fr
Application granted granted Critical
Publication of EP0671752B1 publication Critical patent/EP0671752B1/fr
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
    • H01H13/702—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/705—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00—Facilitation of operation; Human engineering
    • H01H2217/028—Facilitation of operation; Human engineering on planes with different or alterable inclination, e.g. convex plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/008—Casings metallic

Definitions

  • the invention relates to a keyboard with inserted safety mats and Switching foils, and in particular such a keyboard with one on the Underside provided measure to increase the bending and Torsional stiffness and weight.
  • keyboard base plates In order to achieve greater flexural rigidity on keyboard base plates, is known, which is usually made of injection molded plastic material existing base plate with reinforcing elements in the form of ribs or Surrounds.
  • Modern keyboards such as be used for personal computers, have more compact and powerful due to the use Components meanwhile a very high degree of compactness and therefore accompanied by low weight.
  • Keyboards with pivoting housing feet are also known whose separate bearings are attached to the base plate.
  • a keyboard according to the preamble of claim 1 is e.g. known from GB-A-2 250 380.
  • the object of the present invention is a construction for a keyboard propose a switch mat and a multilayer switch film set contains, where too high a degree of complexity in the geometry of the keyboard housing is avoided, and by integrating the housing feet in the Base plate increased bending and torsional stiffness as well as a higher one Weight is achieved, with a relatively simple assembly of the individual Keyboard components are preserved.
  • the keyboard according to the invention is between the base plate and the lowest of the foils in the switching foil set a metal plate in a form-fitting manner Cutout inserted in the base plate and between the deformable Safety mat and the base plate clamped. Furthermore, the rigidity increased by the housing feet integrated in the base plate.
  • the multilayer Switching film set is provided with one or more openings which each have a buffer element integrated in one piece in the switch mat reaches through and on top of the metal plate or on the top of the bottom switching foil for Lying comes, and that the top of the keyboard housing on its inside is provided with ribs, of which at least a part on the top of this Buffer elements rests. This will make the safety mat in the area Buffer elements pressed onto the underlying metal plate, causing this fixed and the film set is stored essentially floating.
  • the keyboard is the underside of the lowest switching foil with conductor tracks and / or provided contact points that are in electrical contact with the underlying metal plate, on which this bottom switching film is pressed, with an advantageous increase in electromagnetic Shielding results.
  • Housing feet are in two or more of these reinforcing webs in one piece by means of bearing recesses on the reinforcing webs molded bearing journals.
  • the swiveling housing feet have one of their bearing recesses opposite, rounded support area and can be via a Angular range of at least 90 ° pivoted between two end positions be, by means of suitable locking devices in these End positions are fixed.
  • the shape and size of the case feet are like this matched to the reinforcing bars that there is no in the one end position Part of a housing foot wider than the footprint of the reinforcing webs from the base plate extends away and at the same time part of the support area in is on the same level as the footprint of the reinforcing webs. in the when unfolded, the case feet protrude from the base of the Reinforcing webs.
  • the pivotable housing feet with a non-slip bead which is designed so that in both end positions of the pivotable housing feet each a portion of this anti-slip bead the pad forms the maximum distance from the in the respective end position Has bottom plate and together with one in the front, the operator facing area of the keyboard lying anti-slip knob forms stable multi-point support.
  • Close to the reinforcement bars with swiveling housing feet can also each have several rib-shaped, different from the Base plate lifting webs may be attached, which are not up to the through the footprints of the reinforcement webs defined by the level Extend the base plate away. On the one hand, these serve as additional Reinforcing elements, and on the other hand they offer the operator the Possibility to put the fingertips on it when swiveling the housing feet support.
  • Fig. 1 shows a partial section through an inventive keyboard 1 with a in a recess in the base plate 4 positively inserted metal plate 2.
  • a multilayer switching foil set 3 rests on this metal plate.
  • individual key buttons 9 are mounted so that they can be moved vertically. These buttons are provided on their underside with plungers 49 that are on the top of one made of an elastomeric material Switch mat 7 in one piece integrated switching domes 47.
  • the switching mat 7 lies on the top of the top switching film.
  • the multilayer film set 3 is provided with openings in several places, in immerse the buffer elements 42 integrally integrated in the switching mat 7.
  • the inside of the upper housing part 8 is projecting downwards Stiffening ribs 46 are provided, of which at least a part on the Buffer elements 42 rests, and thereby to fix the switch mat 7 contributes.
  • the deformable switch mat 7 serves as tolerance compensation between the (rigid) metal plate 2 and the (rigid) stiffening ribs 46th
  • Fig. 2 shows the base plate 4 of the keyboard 1.
  • this Bottom plate On the underside of this Bottom plate are several reinforcing webs 15a, 15b and 15c attached in plan view show a substantially U-shaped structure and in one piece, z. B. are integrated by injection molding into the base plate 4, and in which additionally pivotable housing feet 14 are mounted in journals 28.
  • the Bearing journals are attached in the base area 36 of the reinforcing webs.
  • These reinforcing webs 15a, 15b and 15c are preferably located in the backwards (in normal working position, with the down on a Storage area on the base plate 4, area facing away from the operator) the bottom plate 4.
  • additional rib-shaped webs 16 may be attached.
  • buttons 9 When a button 9 is pressed, it presses the underlying button Switch dome 47 and presses the extension 47a of the switch dome on the the upper switching film 3a underneath, which, like the very bottom lying switching film 3c on the inside with electrically conductive tracks and especially in the areas directly below the tappets with contact points is provided.
  • spacer film 3b which the two outer films in one Keeps a distance from each other and thus electrical against each other isolated.
  • spacer film 3b In the area of the contact points at which the extensions 47a on the Press upper switching film 3a, but the spacer film 3b is with openings provided (due to the scale used not shown in Fig. 1, 3 and 4).
  • the extension 47a When the extension 47a is pressed onto the upper switching film 3a, it becomes on this switching film 3a below the extension 47a electrical Contact point through the opening in the spacer film 3b on a underlying electrical contact point on the lower switching film 3c pressed so that the electrical contact between the two switching foils 3a, 3c is closed at this point.
  • FIG. 4 shows a second section running parallel to the section in FIG. 1 in an enlarged section in the area of the dashed curve III the keyboard with an inserted metal plate.
  • the openings in Area of the buffer elements 42 can also be designed so that they are only by the run through the upper switching film 3a and the spacer film 3b, but not through the lower switching film 3c, resulting in a pressing of the lower switching film 3c leads to the metal plate 2.
  • FIG. 5 shows an enlarged section of the area around that in FIG. 2 left reinforcing web 15a, which with two journals 28 for Bearing of a housing foot 14 (shown in FIG. 2 at the reinforcing web 5c) and one lying essentially in the plane of the base plate 4 Locking tongue 33 and a standing area rising from this base plate 4 27 is provided.
  • FIG. 6 shows a section through the area shown in FIG. 5 along the line IV-IV.
  • the size and shape of the housing feet (not shown in FIG. 6) are matched to the reinforcing webs 15a, 15b and 15c in such a way that the housing feet do not protrude beyond the standing surface 27 of the reinforcing webs when folded.
  • the base plate 4 of the keyboard according to the invention rests with the base on the support surface indicated by the broken line a when the housing feet are folded in.
  • the operator can support a finger behind the rib-shaped webs 16 with the reinforcement webs 15a, 15c resting on the support surface a and slide another finger between the rib-shaped webs 16 and the support surface, around the to be pivoted in the reinforcing web 15a or 15c, folded housing foot 14.
  • FIG. 7 shows a side view of the keyboard 1, with a section through the reinforcing web 15a in order to show a housing foot both in the folded-in position 14a and in the unfolded position 14b.
  • the possible orientations of the support surfaces relative to the keyboard 1 with associated inclination angles ⁇ and ⁇ are indicated by dashed lines a and b .
  • the inclination angles .alpha. And .beta. are each determined by the anti-slip knob 22 located on the front of the keyboard 1 facing the operator and the position of the housing foot 14a or 14b.
  • the housing base is mounted in the bearing journal 28 and can be pivoted between the two end positions 14a and 14b shown in FIG. 7.
  • the housing base is provided with a slightly rounded support area 29 facing away from the journal 28, which is provided with a z. B. is provided in a groove running, anti-slip bead 19.
  • the size and shape of the housing base and this anti-slip bead 19 are matched to the reinforcing web 15 in such a way that the housing base does not protrude in the folded state 14a beyond the bearing surface a extending through the anti-slip knob 22 and the standing surface 27 of the reinforcing web 15. Section 19a of this anti-slip bead lies in the plane of the support surface a .
  • a housing foot 14a ensures that the keyboard 1 shows a pre-inclination towards the operator in the folded state of the housing foot, which is determined by the inclination angle ⁇ is, and that the keyboard is further supported by the resting of the portion 19a of the anti-slip bead 19 on the support surface a non-slip.
  • the inclination of the keyboard 1 to the new support plane b is now determined by the inclination angle ⁇ .
  • FIG. 8 and 9 show enlarged representations of a reinforcing web 15 with bearing pin 28 or a housing foot 14 that can be placed on the bearing journal 28 with the bearing recess 47.
  • the housing foot 14 is provided with two locking notches 18 on the outer circumference of its anchoring region 26 pivotably mounted on the bearing journal 28 , which are offset from one another by at least 90 ° along the circumference, and into which a locking rib 17, which is attached to the latching tongue 33 of the reinforcing web 15 shown in FIG. 8, engages, in order to thereby pivot the pivotable housing foot 14 in its two end positions 14a and 14b (see FIG 7) to fix.
  • the housing foot is provided with a knob 32 which rests on the inner wall 35 of the reinforcing web 15 when the housing foot 14 is folded out. Furthermore, the housing base 14 is rounded on its support area 29 facing away from the bearing recesses 37 and with a z. B. in a groove guided, partially circumferential, anti-slip bead 19 which, as explained in connection with FIG. 7, rests in both snap-in end positions 14a and 14b of the pivotable housing foot 14 on the respective level of the contact surface a and b and so for one keyboard provides increased slip resistance.
  • a slightly wedge-shaped cutout 38 is provided in the central longitudinal plane narrowest point is smaller than the diameter of the bearing recess.
  • the advantages of the invention are therefore inexpensive Increasing your own weight accompanied by an improvement in Torsion and bending stiffness in the interaction of the housing feet with a simple and play-free clamping of the metal plate without one complex geometry for stiffening grooves or beads in the keyboard housing require.
  • the metal plate also provides an easy way to Improve electromagnetic compatibility by adding one to their Bottom with electrical contacts provided lower switching film 3c on the Metal plate 2 is pressed.

Landscapes

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

Claims (9)

  1. Clavier (1) avec feuille souple à contacts (7) incorporée et plaquette multicouche à contacts (3) dans lequel, est intercalée, d'une façon parfaitement ajustée, entre la plaque de base (4) et la couche inférieure de la plaquette multicouche une plaquette métallique (2) vissée entre la feuille souple à contacts et la plaque de base (4),
       sur lequel, au dessus de la plaque de base (4) et dans la partie inférieure du boítier du clavier et faisant partie intégrante de celui-ci, sont disposées des pattes-supports (15) en forme de U et constituant une surface d'appui (27), différente du plan de cette plaque de base. et,
       sur lequel dans la zone de la base (36) des pattes-supports (15) sont placés des tourillons (28) pour la rotation des pieds basculants (14) du boítier
    caractérisé en ce,    que les pieds du boítier (14) peuvent être encliquetés sur des nervures (17), au moyen d'encoches (18), et
       que le circuit imprimé multicouche (3) comporte un ou plusieurs perçages traversant la totalité ou une partie seulement des couches de ce circuit imprimé, à travers lequel pénètre un élément de butée (42), constitué d'une seule pièce, intégré dans la feuille souple à contacts (7), venant reposer sur la face supérieure de la plaque métallique (2) ou sur la face supérieure de la couche inférieure du circuit imprimé.
  2. Clavier selon la revendication 1,
    caractérisé en ce, que la face inférieure de la couche inférieure du circuit imprimé (3c) reçoit des pistes conductrices et/ou des points de contact qui sont en contact électrique avec les plaques métalliques (2) placées au dessous.
  3. Clavier selon l'une des revendications 1 ou 2,
    caractérisé en ce,    que la partie supérieure du boítier (8) du clavier (1) comporte sur sa face interne, des barrettes (46) dont une partie au moins s'applique sur la face supérieure de l'élément de butée (42).
  4. Clavier selon l'une des revendications 1 à 3,
    caractérisé en ce,    qu'une partie au moins, des barrettes (46) de la partie supérieure (8) du boítier s'encliquette dans des crans (48) correspondants, disposés sur la plaque de base (4) et que les éléments de butée (42) sont situés directement au dessous de ce point d'encliquetage.
  5. Clavier selon l'une des revendications 1 à 4,
    caractérisé en ce,    qu' à leurs extrémités opposées aux ouvertures des paliers (37), les pieds (14) du boítier, ont une surface d'assise munie d'une garniture antiglissante (29),
       que les pieds (14) du boítier peuvent effectuer une rotation d'au moins 90° entre leurs deux positions extrêmes, et peuvent être maintenus en place dans ces positions extrêmes au moyen de dispositifs d'encliquetage appropriés.
       que la forme et la dimension des pieds s'adapte à celle des pattes supports (15) en sorte que, dans l'une des positions terminales, aucune partie de ces pieds (14) ne dépasse depuis la plaque de base (4) la surface d'appui (27) des pattes supports (15), et
       qu'à l'autre extrémité, une partie des pieds (14) du boítier s'étend depuis la plaque de base (4) au delà de la surface d'appui (27) des pattes supports (15).
  6. Clavier selon la revendication 1,
    caractérisé en ce,    que la garniture antiglissante (29) est insérée dans une rainure courant partiellement autour de la zone de revêtement, et
       que dans les deux positions extrêmes des pieds basculants
    (14), un partie de la zone de cette garniture antiglissante (19) constitue pour chacun d'eux la zone du pied (14) présentant dans sa position extrême respective, la distance maximale par rapport à la plaque de base (4).
  7. Clavier selon la revendication 5 ou 6,
    caractérisé en ce,    que les pieds basculants (14) comportent, dans leur position de fixation, deux encoches (18) dans lesquelles s'emboítent des nervures (17) disposées sur la plaque de base (4) ou dans les zones des bases (36) des pattes supports (15), et qui servent à maintenir en place les pieds (14) dans leurs positions d'extrémité respectives.
  8. Clavier selon l'une des revendication 1 à 7,
    caractérisé en ce,    qu'au voisinage des pattes supports (15) munies des pieds (14), sont disposés plusieurs supports formés d'un ensemble d'ailettes (16) se développant à partir de la plaque de base (4), et
       que ces supports formés d'un ensemble d'ailettes (16) ne dépassent pas, depuis la plaque de base (4), la surface définie par la surface d'appui (27) des pattes supports (15).
  9. Clavier selon la revendication 7,
    caractérisé en ce,    que, entre les branches des pattes supports (15) en forme de U, la plaque de base (4) est constituée par une languette à cran, pénétrant par son cran (17) dans les encoches (18) des pieds (14).
EP95101840A 1994-03-11 1995-02-10 Clavier Expired - Lifetime EP0671752B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19944408331 DE4408331A1 (de) 1994-03-11 1994-03-11 Tastatur mit schwenkbaren Gehäusefüßen
DE4408331 1994-03-11
DE19944442073 DE4442073C2 (de) 1994-11-25 1994-11-25 Tastatur mit Metallplatte
DE4442073 1994-11-25

Publications (3)

Publication Number Publication Date
EP0671752A2 EP0671752A2 (fr) 1995-09-13
EP0671752A3 EP0671752A3 (fr) 1998-03-11
EP0671752B1 true EP0671752B1 (fr) 2002-06-05

Family

ID=25934631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95101840A Expired - Lifetime EP0671752B1 (fr) 1994-03-11 1995-02-10 Clavier

Country Status (4)

Country Link
US (1) US5574446A (fr)
EP (1) EP0671752B1 (fr)
DE (1) DE59510220D1 (fr)
TW (1) TW305970B (fr)

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DE69529978T2 (de) * 1994-12-28 2004-01-29 Idec Izumi Corp Dünne schaltvorrichtung und anzeigevorrichtung mit schalter
US6031524A (en) * 1995-06-07 2000-02-29 Intermec Ip Corp. Hand-held portable data terminal having removably interchangeable, washable, user-replaceable components with liquid-impervious seal
US6492978B1 (en) * 1998-05-29 2002-12-10 Ncr Corporation Keyscreen
US5980135A (en) * 1998-09-22 1999-11-09 Acer Peripherals, Inc. Keyboard with an optional metal support for strengthening its structure
US6657146B1 (en) 2000-03-28 2003-12-02 Thomson Licensing, S.A. Button ball and alignment rib
KR100876626B1 (ko) * 2001-04-01 2008-12-31 인티그리스, 인코포레이티드 박형 웨이퍼 인서트
JP4119707B2 (ja) * 2002-08-02 2008-07-16 ポリマテック株式会社 キーパッド、樹脂キートップ用射出成形金型、および樹脂キートップの製造方法
US7629547B2 (en) * 2006-04-24 2009-12-08 Nokia Corporation Illuminating of an electrical device
CN101751128B (zh) * 2008-11-28 2011-10-26 华硕电脑股份有限公司 防止误动作的键盘模块
US7903398B2 (en) * 2009-05-11 2011-03-08 Dell Products L.P. Information handling system keyboard
JP4924738B2 (ja) * 2010-04-12 2012-04-25 カシオ計算機株式会社 キー装置、及び電子機器
TWI421892B (zh) * 2010-04-16 2014-01-01 Jensin Internat Technology Corp A keyboard with an illuminated light source
CN102592869A (zh) * 2012-01-17 2012-07-18 广东步步高电子工业有限公司 一种电子设备的按键装置及电子设备

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US4029916A (en) * 1975-04-18 1977-06-14 Northern Electric Company Limited Multi-contact push-button switch and plural embodiment for keyboard switch assembly
US4354068A (en) * 1980-02-04 1982-10-12 Texas Instruments Incorporated Long travel elastomer keyboard
IT1144971B (it) * 1981-10-21 1986-10-29 Olivetti & Co Spa Tastiera a contatti
US4560844A (en) * 1983-07-11 1985-12-24 Brother Kogyo Kabushiki Kaisha Key-holding structure of a keyboard with curved operating surface of keys
US4592528A (en) * 1984-05-22 1986-06-03 Northern Telecom Limited Leg assembly for a keyboard or the like
IT1187888B (it) * 1986-01-31 1987-12-23 Olivetti & Co Spa Dispositivo per regolare l inclinazione di una tastiera
US4814747A (en) * 1987-05-29 1989-03-21 Wathor J D Keyboard storage for a terminal
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GB2250380B (en) * 1990-11-27 1995-01-04 Ist Lab Ltd Switch apparatus
JP2557557Y2 (ja) * 1991-02-12 1997-12-10 ミネベア株式会社 キースイッチ
US5278557A (en) * 1991-02-19 1994-01-11 Key Tronic Corporation Cursor movement control key and electronic computer keyboard for computers having a video display
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US5438177A (en) * 1992-05-06 1995-08-01 Key Tronic Corporation Two-layer membrane switch

Also Published As

Publication number Publication date
US5574446A (en) 1996-11-12
EP0671752A3 (fr) 1998-03-11
TW305970B (fr) 1997-05-21
EP0671752A2 (fr) 1995-09-13
DE59510220D1 (de) 2002-07-11

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