EP0354340B1 - Tastatur - Google Patents

Tastatur Download PDF

Info

Publication number
EP0354340B1
EP0354340B1 EP89111945A EP89111945A EP0354340B1 EP 0354340 B1 EP0354340 B1 EP 0354340B1 EP 89111945 A EP89111945 A EP 89111945A EP 89111945 A EP89111945 A EP 89111945A EP 0354340 B1 EP0354340 B1 EP 0354340B1
Authority
EP
European Patent Office
Prior art keywords
front frame
circuit board
bottom part
keyboard
chararcterized
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
EP89111945A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0354340A3 (de
EP0354340A2 (de
Inventor
Paul Blaser
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.)
Digital Kienzle Computersysteme GmbH and Co KG
Original Assignee
Digital Kienzle Computersysteme GmbH and Co KG
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 Digital Kienzle Computersysteme GmbH and Co KG filed Critical Digital Kienzle Computersysteme GmbH and Co KG
Publication of EP0354340A2 publication Critical patent/EP0354340A2/de
Publication of EP0354340A3 publication Critical patent/EP0354340A3/de
Application granted granted Critical
Publication of EP0354340B1 publication Critical patent/EP0354340B1/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
    • H01H2223/00—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/054—Mounting of key housings on same printed circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/034—Positioning of layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/042—Snap coupling; Snap mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/044—Injection moulding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/024—Miscellaneous with inductive switch

Definitions

  • the invention relates to a keyboard with a key-carrying circuit board and a housing according to the preamble of claim 1.
  • Keyboards in particular those which, as autonomous aggregates, so to speak represent an auxiliary component of data processing systems, are expected to function without any doubt, to be exchangeable at any time or to be able to be integrated into an existing device configuration and to be inexpensive.
  • keyboards generally meet the aesthetic and functional quality requirements of the office environment. In harsh operating and operating conditions, these keyboards often have defects due to temperature-dependent Strains on. These are essentially due to the classic construction of the keyboards with several components bolted to each other like a story. In this respect, the construction of the known keyboards cannot meet the requirements of large-scale production with ultimately mechanical assembly.
  • a keyboard of the type specified in the preamble of claim 1 is known, for example, from DE-A-35 12 795.
  • This keyboard contains a cover plate with centering bolts provided in the edge area, which engage in corresponding centering openings in a keyboard support plate, on the underside of which the circuit board is attached.
  • the object of the present invention is therefore to optimize the construction of keyboards in such a way that, on the one hand, it meets the requirements for economical production and, on the other hand, the different operating conditions of the keyboards.
  • the keyboard according to the invention consists only of a front frame, a base part and a preassembled module, namely a printed circuit board directly equipped with keys, and that these Components are connected to each other only by snap connections.
  • the circuit board between the front frame and the base part when they are locked together, so to speak, "floating" is held, that is, the housing formed from the front frame and base part can z. B. stretch depending on the temperature, without causing stresses in the circuit board due to such expansion.
  • tolerance additions perpendicular to the key plane are also reduced, and the production lying in the key plane is reduced tolerances, the relatively rough design of the housing components produced by injection molding is largely ineffective with regard to the assembly of the keyboard.
  • an alignment element is formed on a central point of the front frame, for example on a web dividing the keyboard into individual key fields, which cooperates with an opening in the printed circuit board and, by providing relatively narrow tolerances for this connection, provides a relatively precise fixation of the two components at least in the direction of the largest dimension of the keyboard.
  • At least one further alignment element formed on the front frame and a further opening in the printed circuit board associated therewith are provided in order to form, so to speak, an anti-rotation device between the front frame and the printed circuit board or a fixation in a second dimension, the further opening in order to stretch against the central fixation to allow is designed as an elongated hole.
  • the front frame and base part takes place, so to speak, only on one line, namely along the greatest extent of the keyboard, which in particular ensures that the locking elements that are effective on this line are safe to engage.
  • the formation of alignment elements and locking elements such that both one and the same opening in the circuit board can be assigned is one further advantage of the invention.
  • the front frame is designed in such a way that it overlaps the edge of the trough-like base part with all-round spacing. In the same way, sufficient lateral clearance is also assigned to each latching connection.
  • the front frame and base part are designed as relatively simple parts, so that the molding effort is low.
  • FIGURE 1 shows an alphanumeric keyboard 1 with a letter, a number, a function and a so-called cursor keypad 2, 3, 4 and 5. Bars 7, 8 and 9 are formed on a front frame 6, which separate the individual keypads 2, 3, 4 and 5 from each other. With 10 together with the front frame 6 the housing of the keyboard 1 forming bottom part is designated.
  • FIG. 2 shows a perspective staggered arrangement of the rear and bottom views of the components forming the keyboard 1, namely the front frame 6, the trough-shaped bottom part 10 and a printed circuit board carrying the keys, of which FIG. 1 denotes 11 12.
  • FIG. 1 denotes 11 12.
  • the printed circuit board 12 mutually crossing, unspecified conductor tracks are applied, which form induction coils at the crossing points together with a hole in the printed circuit board. That is, in the selected embodiment, the signal is given inductively.
  • the individual, unspecified legs of the front frame 6 and the webs 7, 8 and 9 are profiled U-shaped, not least for reasons of injection molding, so that a peripheral outer wall 13 and inner wall parts, of which one designated by 14 are formed.
  • the inner wall portions 14 of the webs 7, 8 and 9 and the legs of the front frame 6 form the support for the printed circuit board 12, the end faces of the wall portions 14 preferably not being formed in one and the same plane and thus a point or section support the circuit board 12 is achieved.
  • tongues 15 and 16 are formed on the web 7, which represent alignment elements. These engage when placing the circuit board 12 through an opening 17 located in the circuit board 12 and, with respect to the larger dimension of the keyboard 1, bring about an exact, mutual positioning of the circuit board 12 and the front frame 6.
  • a latching hook 18 also formed on the web 7 forms together with one Rib 19 formed transversely to the web 7, a further alignment element which, together with an elongated hole 20 provided in the printed circuit board 12, brings about an exact fixing of the front frame 6 and printed circuit board 12 exclusively in the shorter dimension of the keyboard 1.
  • the opening 17 is also an elongated hole, specifically in the direction of the short dimension, further alignment and locking elements and an elongated hole corresponding to the alignment and locking elements 18, 19 and the elongated hole 20 are preferably provided symmetrically to the opening 17.
  • the formation of the alignment and locking elements is better apparent from FIGURE 5.
  • the rib 19 connects, as FIGURE 5 shows, the walls 14 of the web 7 and thus also serves as a stabilization.
  • the dash-dotted lines L1 and L2 symbolize the position of the lower edge of the elongated holes 17 and 20 in the printed circuit board 12 when it is assigned to the relevant front frame.
  • Pockets 21 are formed in the bottom part 10, into which the latching hooks 18 engage.
  • the opening 22 is assigned to the tongues 15 and 16, so that since the alignment elements 18, 19 are designed such that they also engage in the pockets 21, a mutual positioning of the bottom part 10 and the front frame 6 on a predetermined by the web 7 Line is done.
  • 23 and 24 designate two of three locking hooks formed on the base part 10, which engage in openings 25 and 26 in the wall parts 14 of the front frame 6 when the housing is joined together. Sufficient free space is provided on the side for all latching connections in the longitudinal direction of the keyboard 1.
  • supports 27, which each serve a recessed grip 28, are pivotally mounted in the bottom part 10 of the inclination adjustment of the keyboard 1.
  • a bulge 29 is formed in the base part 10, via which the keyboard 1, if necessary, additional units can be assigned.
  • FIGURE 3 From the sectional view FIGURE 3 it can be seen that 10 ribs 30 are formed in the bottom part, on which, when the housing components 6, 10 are locked together, the printed circuit board 12 rests and that the printed circuit board 12 only between the wall parts 14 of the front frame 6 and the ribs 30 is held or stored.
  • FIGURE 3 also shows that the front frame 6 encompasses the trough-shaped base part 10 at a distance on all sides.
  • the keys are 11 directly attached to the printed circuit board 12, ie the respective key base 31 is latched to the printed circuit board 12, for example, and the key head 32 is spring-mounted on the key base in a manner known per se by means of a suitable column guide.
  • the sectional view FIGURE 4 again shows the integrated construction of the alignment and locking elements 18, 19 formed on the web 7 and assigned to the opening 20 in the printed circuit board 12 and the pocket 21 in the base part 10.

Landscapes

  • Input From Keyboards Or The Like (AREA)
EP89111945A 1988-08-12 1989-06-30 Tastatur Expired - Lifetime EP0354340B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3827430 1988-08-12
DE3827430A DE3827430C2 (de) 1988-08-12 1988-08-12 Tastatur
DE8810271U DE8810271U1 (de) 1988-08-12 1988-08-12 Tastatur mit einer Tasten tragenden Leiterplatte und einem Gehäuse

Publications (3)

Publication Number Publication Date
EP0354340A2 EP0354340A2 (de) 1990-02-14
EP0354340A3 EP0354340A3 (de) 1991-05-15
EP0354340B1 true EP0354340B1 (de) 1995-03-08

Family

ID=25871064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111945A Expired - Lifetime EP0354340B1 (de) 1988-08-12 1989-06-30 Tastatur

Country Status (3)

Country Link
US (1) US5001307A (enrdf_load_stackoverflow)
EP (1) EP0354340B1 (enrdf_load_stackoverflow)
DE (2) DE3827430C2 (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3827430C2 (de) * 1988-08-12 1996-02-08 Kienzle Digital Computersyst Tastatur
JPH04169917A (ja) * 1990-05-07 1992-06-17 Toshiba Corp 携帯型電子機器
DE4029232A1 (de) * 1990-09-14 1992-03-19 Vedder Gmbh Geb Vorrichtung zur verbindung von mehreren elektrotechnischen installationsgeraeten
USD347629S (en) 1991-09-23 1994-06-07 Ncr Corporation Keyboard
DE9113293U1 (de) * 1991-10-25 1992-11-19 Cherry Mikroschalter Gmbh, 8572 Auerbach Tastatur mit verschnappten Gehäusehälften
GB2272405B (en) * 1992-11-12 1995-12-06 Rockwell International Corp Control console for a telephone system
US5428502A (en) * 1993-12-01 1995-06-27 Chicony Electronics Co., Ltd. Keyboard frame assembly mounting hardware having hooks, bridge strips, and locating stub rods
US5486058A (en) * 1994-08-09 1996-01-23 Allen; Donald E. Continuous touch keyboard
TW413781B (en) * 1998-06-26 2000-12-01 Acer Peripherals Inc Push-button keyboard capable of being installed with strengthened plates having different thickness
DE20110507U1 (de) * 2001-06-27 2002-09-05 Grote & Hartmann GmbH & Co KG, 42369 Wuppertal Kontaktiervorrichtung
US20030201915A1 (en) * 2002-04-24 2003-10-30 Anderson Charles S. Computer keyboard
TW200928672A (en) * 2007-12-21 2009-07-01 Asustek Comp Inc Keyboard module and electronic device having the same
US9640346B2 (en) * 2015-09-11 2017-05-02 Dongguan Zen-tech Electronic Technology Co., Ltd. Keyboard

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7417008U (de) * 1974-05-15 1974-09-12 Cannon Electric Gmbh Gehäuse zur Aufnahme eines integrierten Schaltungsbausteines
DE3135139A1 (de) * 1981-09-04 1983-03-24 Siemens AG, 1000 Berlin und 8000 München Bedienungsgeraet mit eingabetastatur
US4467150A (en) * 1982-02-24 1984-08-21 Digital Equipment Corporation Electronic keyboard
KR900006479Y1 (ko) * 1983-04-20 1990-07-26 부라더 고오교 가부시기가이샤 키보드
DE3319334C1 (de) * 1983-05-27 1984-09-13 Siemens Ag Verriegelvorrichtung fuer ein zweiteiliges Tastaturgehaeuse
US4560845A (en) * 1983-10-20 1985-12-24 Brother Kogyo Kabushiki Kaisha Keyboard
DE8410365U1 (de) * 1984-04-03 1984-06-20 Nixdorf Computer Ag, 4790 Paderborn Bedienungsfeld für elektrische und elektronische Geräte
US4605828A (en) * 1984-05-29 1986-08-12 International Business Machines Corporation Membrane keyboard switch mounting
US4524249A (en) * 1984-06-01 1985-06-18 Texas Instruments Incorporated Keyboard switch assembly
DE3512795C1 (de) * 1985-04-10 1986-10-23 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Tastatur, insbesondere für Fernmeldevermittlungsanlagen
US4671688A (en) * 1985-10-02 1987-06-09 Honeywell Inc. Shielded keyboard
US4760217A (en) * 1987-02-04 1988-07-26 Brother Kogyo Kabushiki Kaisha Keyboard having lower casing with integral upraised portion for supporting PC board, and key switch having air vent in PC board
JPH0629857Y2 (ja) * 1987-05-22 1994-08-10 沖電気工業株式会社 キ−ボ−ド装置
DE3827430C2 (de) * 1988-08-12 1996-02-08 Kienzle Digital Computersyst Tastatur

Also Published As

Publication number Publication date
DE8810271U1 (de) 1988-09-29
EP0354340A3 (de) 1991-05-15
DE3827430C1 (enrdf_load_stackoverflow) 1989-10-05
DE3827430C2 (de) 1996-02-08
EP0354340A2 (de) 1990-02-14
US5001307A (en) 1991-03-19

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