EP0435131A1 - Tastatur mit festgehaltenen Tasten - Google Patents

Tastatur mit festgehaltenen Tasten Download PDF

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Publication number
EP0435131A1
EP0435131A1 EP90124541A EP90124541A EP0435131A1 EP 0435131 A1 EP0435131 A1 EP 0435131A1 EP 90124541 A EP90124541 A EP 90124541A EP 90124541 A EP90124541 A EP 90124541A EP 0435131 A1 EP0435131 A1 EP 0435131A1
Authority
EP
European Patent Office
Prior art keywords
keys
support
plane
keyboard
framework
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
EP90124541A
Other languages
English (en)
French (fr)
Other versions
EP0435131B1 (de
Inventor
Christian Bourel
Jean-Paul Pholoppe
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.)
ALE International SAS
Original Assignee
Alcatel Business Systemes SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Business Systemes SA filed Critical Alcatel Business Systemes SA
Publication of EP0435131A1 publication Critical patent/EP0435131A1/de
Application granted granted Critical
Publication of EP0435131B1 publication Critical patent/EP0435131B1/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
    • H01H2233/00—Key modules
    • H01H2233/002—Key modules joined to form button rows
    • H01H2233/004—One molded part
    • H01H2233/006—Separating individual keys after mounting

Definitions

  • the present invention relates to a keyboard with captive keys, that is to say a keyboard which holds the keys as soon as they are in place, regardless of its orientation.
  • keyboards essentially comprise a support provided with cells and keys which are introduced into these cells.
  • the support is a simple plate pierced with a hole for each key; the keys each have a body whose section is slightly less than that of the hole, this body ending at one of its ends by a shoulder whose section is greater than that of the hole.
  • the keys are inserted, shoulder up, in the substantially horizontal plate. This provision prohibits turning over the plate during assembly or disassembly of the device, without having removed the keys before.
  • a first solution consists in fixing a mask on the face of the support by which the keys have been introduced. This mask has openings whose geometry coincides with that of the cells of the support, these openings having a reduced dimension compared to the shoulder of the keys.
  • the term "shoulder" should be understood, in general, like any mechanical stop device.
  • This solution adds two steps in the manufacture of the keyboard, the realization of the mask and its fixing, which generates a complication of the process and an additional cost.
  • a second solution is to use a click system. In such a system or two elements must snap, an element carries at least one elastic blade provided with a hook, this hook coming to be embedded in a cavity of the other element.
  • the assembly of the two elements requires, first, that the blade deviates from its rest position. This travel must therefore be taken into account, which increases the size of the device.
  • the hooks have a minimum dimension which is a function of manufacturing constraints. This minimum dimension does not allow make certain types of keyboard which have small dimensions and / or whose keys are very close to each other.
  • the elements (the support and the key) of the keyboard are made by molding, the shaping of the hook leads to making an undercut mold. This complicates the development of the mold, if however the small dimensions of the element considered do not prohibit making such a mold for technological reasons.
  • the present invention thus relates to a keyboard with captive keys, the implementation of which is not affected by the limitations set out above.
  • the fixing means comprise rivets secured to the support which cooperate with eyelets secured to the frame, the heads of the rivets being crushed after the juxtaposition of the frame and the support.
  • the breaking surfaces are substantially parallel to the bases of the keys with which they are associated.
  • the keyboard with captive keys of the invention comprises a support and a cluster of keys.
  • the intermediate plane defines the thickness of the support 1 relative to the outside plane outside the zone where the cells 2 appear, while the support plane corresponds to a reinforced thickness of this support in the vicinity of the cells.
  • These cells which extend from the external plane 3 to the support plane 5 are delimited by walls 6 perpendicular to these planes.
  • Rivets 7 the function of which will be explained later, are projecting from the support plane 5.
  • the frame of the cluster has its base on the lower plane while the keys extend from the rupture plane to the upper plane with the exception of certain projections.
  • a key 11 comprises a body 15 which has the shape of a beveled rectangular parallelepiped on its upper face and whose base inscribed in the rupture plane 14, has dimensions slightly smaller than those of a cell 2.
  • Two stops 17, 18 form protrusions on each short side of the body 15 perpendicular to its base. They extend from a level between the lower plane 12 and the rupture plane to a stop level between the rupture plane and the upper plane. In addition, the length of the base of the body 15 increased by twice the thickness of these stops is greater than the length of a cell 2.
  • Two protrusions 19 form protrusions on each long side of the body 15 perpendicular to its base. They extend from the rupture plane to the abutment level defined above, which defines their thicknesses. In addition, the width of the base of the body 15 increased by twice the thickness of these protrusions is greater than the width of a cell 2.
  • a key 11 is connected to the framework 10 only by a part of each protuberance 19 in the rupture plane.
  • the intersection of the projections of the protuberance and the framework 10 in this plane defines a rupture surface 20 whose dimensions are small with respect to those of the protuberance, in particular its thickness.
  • This breaking surface corresponds to the smallest section achievable on the assembly constituted by a key 11 and the framework 10. It is oriented, in this case, parallel to the breaking plane, which represents a particular case of the invention .
  • the cluster of keys appears in its entirety in FIG. 4 where it is represented seen from below, that is to say on the lower plane side 12.
  • the keys 11 are arranged in five rows of three units, like the cells 2, of way to coincide with these.
  • the framework 10 of the cluster comprises six cross members 21, 22, 23, 24, 25, 26 delimiting these rows and two parallel beams 28, 29 joining these cross members outside the keys 11.
  • the crosspieces and the beams are delimited by the lower plane 12 and the rupture plane 13.
  • Each cross member comprises, facing the protrusions 19 of the keys 11, studs 30 projecting and overlapping these protrusions on the rupture surfaces 20 previously defined.
  • These nipples are delimited by the lower plane and the rupture plane, which defines their thicknesses.
  • a rupture surface has dimensions which are small compared to those of a nipple, in particular its thickness.
  • eyelets 33 On the periphery of the framework 10, that is to say on the end crosspieces 21, 26 and on the beams 28, 29, are arranged eyelets 33 whose axis is perpendicular to the plane of the keyboard, these eyelets being projecting outward from the cluster.
  • FIGS. 5 and 6 represent the central button 11 of the first row of the cluster with the portions of the crosspieces 21, 22 which face it, respectively seen from below and views in section.
  • a rib 35 which has not been drawn in FIG. 4, extends all along the crosspieces and beams along the medians of these. It is perpendicular to the fracture plane 13 and, having a uniform thickness, develops from this plane to a contact plane 36.
  • This contact plane 36 is located between the stop level, stops 17, 18 and protuberances 19, and the upper plane 14.
  • An eyelet 33 also extends from the rupture plane 13 to the contact plane 36. It comprises a cavity 39 which opens onto the rupture plane and which is extended by a bore 40 of a reduced diameter compared to the size of the cavity. This bore opens onto the contact plane 36 by flaring. Its diameter is slightly greater than that of the rivets 7 which appear on the support 1.
  • the eyelets 33 in an amount equal to the rivets 7, are arranged on the cluster so as to coincide with the latter when the keys 11 coincide with the cells 2.
  • the set of eyelet-rivet pairs constitutes an example of fastening means for the framework 10 to the support 1.
  • These fixing means can use any other known assembly technique such as gluing, hot deformation, etc.
  • the final realization of the keyboard requires two operations, the fixing of the framework 10 to the support 1 and the separation of the keys 11 from the framework.
  • the fixing of the frame to the support is carried out in a simple manner by crushing the heads of the rivets 7, which can be carried out with a single tool.
  • the two steps of assembling the keyboard were presented as successive to improve the clarity of the presentation. These two stages can be carried out using a single tool which, during its movement, begins by detaching the keys and ends by crushing the heads of the rivets 7.
  • the chronology of the two phases is practically imperative because, when a rivet is crushed it is difficult to advance the tool again without risking damaging this rivet or the eyelet associated with it.
  • rupture surfaces 20 which in the example presented are parallel to the rupture plane can take a different inclination if they are sufficiently distant from a plane perpendicular to this rupture plane, a condition necessary for the keys to remain captive of the frame support.

Landscapes

  • Input From Keyboards Or The Like (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Circuits Of Receivers In General (AREA)
  • Telephone Function (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Telephone Set Structure (AREA)
EP90124541A 1989-12-28 1990-12-18 Tastatur mit festgehaltenen Tasten Expired - Lifetime EP0435131B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8917344 1989-12-28
FR8917344A FR2656735B1 (fr) 1989-12-28 1989-12-28 Clavier a touches captives.

Publications (2)

Publication Number Publication Date
EP0435131A1 true EP0435131A1 (de) 1991-07-03
EP0435131B1 EP0435131B1 (de) 1995-06-21

Family

ID=9389083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90124541A Expired - Lifetime EP0435131B1 (de) 1989-12-28 1990-12-18 Tastatur mit festgehaltenen Tasten

Country Status (6)

Country Link
EP (1) EP0435131B1 (de)
AT (1) ATE124166T1 (de)
DE (1) DE69020322T2 (de)
DK (1) DK0435131T3 (de)
ES (1) ES2073500T3 (de)
FR (1) FR2656735B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0725411A3 (de) * 1995-02-02 1998-04-01 VERDA s.r.l. Elektrischer Schalter und Verfahren zu seiner Herstellung
EP1978534A2 (de) 2007-04-04 2008-10-08 BSH Bosch und Siemens Hausgeräte GmbH Tastatur für ein Haushaltgerät und Verfahren für deren Einbau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008010217B3 (de) * 2008-02-20 2009-09-10 Preh Gmbh Schalttafelanordnung mit Bedien- und Abdeckteil aus einem gemeinsamen Grundteil sowie ein Kraftfahrzeug und ein Haushaltsgerät damit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860771A (en) * 1973-10-29 1975-01-14 Chomerics Inc Keyboard switch assembly with dome shaped actuator having associated underlying contactor means
EP0064041A1 (de) * 1981-04-09 1982-11-03 Telefonaktiebolaget L M Ericsson Verfahren zur Herstellung eines Drucktastenfeldes
EP0091284A2 (de) * 1982-04-02 1983-10-12 Ing. C. Olivetti & C., S.p.A. Tastatur mit Kontakten und Verfahren zu ihrer Herstellung
US4609791A (en) * 1984-12-20 1986-09-02 Itt Corporation Flexible diaphragm keypad and method of manufacture
US4638151A (en) * 1984-05-25 1987-01-20 Canon Kabushiki Kaisha Keyboard of an electronic apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860771A (en) * 1973-10-29 1975-01-14 Chomerics Inc Keyboard switch assembly with dome shaped actuator having associated underlying contactor means
EP0064041A1 (de) * 1981-04-09 1982-11-03 Telefonaktiebolaget L M Ericsson Verfahren zur Herstellung eines Drucktastenfeldes
EP0091284A2 (de) * 1982-04-02 1983-10-12 Ing. C. Olivetti & C., S.p.A. Tastatur mit Kontakten und Verfahren zu ihrer Herstellung
US4638151A (en) * 1984-05-25 1987-01-20 Canon Kabushiki Kaisha Keyboard of an electronic apparatus
US4609791A (en) * 1984-12-20 1986-09-02 Itt Corporation Flexible diaphragm keypad and method of manufacture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0725411A3 (de) * 1995-02-02 1998-04-01 VERDA s.r.l. Elektrischer Schalter und Verfahren zu seiner Herstellung
EP1978534A2 (de) 2007-04-04 2008-10-08 BSH Bosch und Siemens Hausgeräte GmbH Tastatur für ein Haushaltgerät und Verfahren für deren Einbau
EP1978534A3 (de) * 2007-04-04 2009-10-28 BSH Bosch und Siemens Hausgeräte GmbH Tastatur für ein Haushaltgerät und Verfahren für deren Einbau

Also Published As

Publication number Publication date
DE69020322T2 (de) 1995-11-02
DE69020322D1 (de) 1995-07-27
FR2656735B1 (fr) 1996-04-26
DK0435131T3 (da) 1995-10-30
FR2656735A1 (fr) 1991-07-05
ES2073500T3 (es) 1995-08-16
EP0435131B1 (de) 1995-06-21
ATE124166T1 (de) 1995-07-15

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