EP0295437B1 - Dispositif de bouton-poussoirs - Google Patents

Dispositif de bouton-poussoirs Download PDF

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Publication number
EP0295437B1
EP0295437B1 EP88107809A EP88107809A EP0295437B1 EP 0295437 B1 EP0295437 B1 EP 0295437B1 EP 88107809 A EP88107809 A EP 88107809A EP 88107809 A EP88107809 A EP 88107809A EP 0295437 B1 EP0295437 B1 EP 0295437B1
Authority
EP
European Patent Office
Prior art keywords
push button
button device
latching
guide body
head
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
EP88107809A
Other languages
German (de)
English (en)
Other versions
EP0295437A3 (en
EP0295437A2 (fr
Inventor
Jürgen Dipl.-Ing. Oelsch
Bertold Stürmer
Gerhard Hochgesang
Nicola Dipl.-Ing. Digiovinazzo
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.)
Preh GmbH
Original Assignee
Preh 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
Application filed by Preh GmbH filed Critical Preh GmbH
Priority to AT88107809T priority Critical patent/ATE98396T1/de
Publication of EP0295437A2 publication Critical patent/EP0295437A2/fr
Publication of EP0295437A3 publication Critical patent/EP0295437A3/de
Application granted granted Critical
Publication of EP0295437B1 publication Critical patent/EP0295437B1/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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/12—Push-buttons
    • H01H3/122—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor
    • H01H3/125—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor using a scissor mechanism as stabiliser

Definitions

  • Such push button devices are already known (DE-OS 33 29 698); there the guide link is formed by double scissors. As a result, reliable parallel guidance of the key head relative to the guide body is achieved even with comparatively large key heads. Such parallel guidance ensures that regardless of the point at which the key is depressed, the desired switching process is triggered without the key head jamming or jamming.
  • Pushbutton devices are also known in which a bracket is provided as a guide member. Such a guide member is mostly used with very long key heads.
  • the assembly of the button head carrying the guide member on the guide body is cumbersome. Because the movable guide member must be inserted from the edge into the engagement slots of the guide body, while the key top must be kept in an aligned position.
  • the object of the invention is to improve a push button device of the type mentioned in such a way that the button head with the guide member can be assembled and disassembled on the guide body in a simple manner and without impairing adjacent devices.
  • This object is achieved in that a latching device is formed on the push button device, which holds the guide member in a latching position, that in the latched position with the button head placed on the guide body, the first stop area of the guide member lies in front of openings in the engagement slots and that by depressing the button head on the guide body, the guide member passes from the latched position into the operating position, the first stop region coming into the engagement slots.
  • the button head can be pulled off with the guide member upwards. This means that the position of the button head relative to the guide body, e.g. can be changed by moving or turning the button head. This is advantageous if one of several switch contacts provided in the guide body or in the grid can be actuated with the button head.
  • a push button device has a button head (1).
  • a cylindrical key tappet (2) is formed on this.
  • the button head (1) is assigned a guide body (3) which is composed of the same symmetrically designed guide body parts (3 ', 3 ⁇ ).
  • a guide sleeve (4) for the key tappet (2) is formed on the guide body (3).
  • the guide body (3) is attached to a plate (5) on which a switching film (6) is arranged.
  • a switching dome (7) of the switching film (6) lies in the base of the guide sleeve (4).
  • a pair of scissors (8) is provided as a guide member, which has two arms (9, 10).
  • a pin (11 to 14) is formed at the two ends of each arm (9, 10).
  • a receptacle (15) is provided on the key top (1), in which a bearing shell (16) for the pin (12) is formed.
  • the pin (12) is thus rotatable in the receptacle (15), but is mounted immovably.
  • a receptacle (17) for the pin (14) of the arm (10) is also provided on the button head (1).
  • a locking cam (18) is formed in the receptacle (17). This forms on the one hand a stop surface (19) and on the other hand a stop surface (20) for the pin (14) (cf. FIGS. 1 to 4).
  • a stop (22) is formed in the region of the articulation point (21) of the scissors (8). This prevents the arms (9, 10) from being able to be moved further towards one another in the direction of the arrows (A) than is shown in FIG. 1.
  • a further stop surface (23) is provided instead of the stop (22) in the receptacle (17).
  • a latching cam (18) with stop faces (19, 20) and a stop face (23) is provided in the receptacle (15) instead of the bearing shell (16).
  • the design of the receptacle (15) thus corresponds to the design of the receptacle (17).
  • engagement slots (24, 25) are formed, which have openings (26, 27) on one side.
  • the scissors (8) on the button head (1) are brought into a detent position.
  • the arm (10) and thus also the arm (9) is blocked.
  • this is achieved in that the pin (14) bears on the stop surface (19) of the latching cam (18) and the arms (9, 10) abut one another on the stop (22).
  • this is achieved in that the pin (14) between the stop surface (19) and the stop surface (23) is held.
  • this is achieved in that the pin (12) is also held in the receptacle (15) between the stop surface (19) and the stop surface (23).
  • the key head (1) is then aligned with the scissors (8) in the locking position on the guide body (3).
  • the key tappet (2) engages in the respective guide sleeve (4).
  • the pins (11, 13) lie at the openings (26, 27) of the engagement slots (24, 25) and then stand on the bottom of the engagement slots (24, 25).
  • the button head (1) is now in its operating position (see FIG. 2). From the operating position, the button head (1) is pushed in by pressing the arrow (B) bring his switching position in which the push button (2) depresses the switching dome (7) so that electrical contacts arranged in it are closed.
  • the pins (11, 13) move in the engagement slots (24 and 25) in the direction of the arrows (C).
  • the pin (14) moves accordingly in the receptacle (17).
  • the pin (12) in the receptacle (15) also shifts accordingly.
  • the button head (1) is reset from the switching position to the operating position by the spring elasticity of the switching dome (7).
  • the return movement into the operating position is limited by the striking of the pin (14) on the stop surface (20) of the latching cam (18).
  • the key head (1) If the key head (1) is to be removed, it is pulled up in the opposite direction of the arrow (B).
  • the pin (14) snaps over the stop surface (20) so that it comes back into the position shown in FIG. 1.
  • the pins (11, 13) lie in the openings (26, 27) so that the key top (1) can be removed from the guide body (3) with the scissors (8).
  • the scissors (8) can automatically move into the locked position.
  • the button head (1) with the scissors (8) can then be rotated against the guide body (3) so that the switching plunger (2) engages in the guide sleeve (4 ') of the guide body part (3') and is accordingly assigned to another switching dome .
  • the guide member is formed by a bracket (28).
  • the bracket (28) has pins (12, 12 ') which are rotatably mounted in receptacles (15) of the key head (1).
  • humps (30, 30') are formed, which depressions (31, 31 ') of the button head (1) are assigned.
  • the legs (29, 29 ') are further provided with pins (11, 11').
  • engagement slots (24, 24') are formed for the pin (11, 11 ') on the guide body (3).
  • the humps (30, 30 ') engage in the depressions (31, 31'). If the button head (1) is placed on the guide body (3), then the pins (11, 11 ') are in front of the engagement slots (24, 24') in the latched position of the bracket (28).
  • the cusps (30, 30 ') disengage from the recesses (31, 31') and the pins (11, 11 ') enter the engagement slots (24, 24').
  • the button head (1) is then movable between its operating position and its switching position.
  • the humps (30, 30 ') are freely movable in free spaces (32, 32').
  • the recess (31, 31 ') forms the stop surfaces (19, 20, 23) for the hump (30).
  • the hump (30) lies between the stop surfaces (19, 23).
  • the button head (1) returns from the switching position, the hump (30) hits the stop surface (20). The same applies to the hump (30 ').
  • the bracket (28) is a wire bracket. Its ends form the pins (11, 11 ').
  • the bracket (28) has leg sections (32, 32 '), which groove-shaped depressions (31, 31') of the key top (1) are assigned. In the locked position, the leg sections (32, 32 ') are engaged in the recesses (31, 31') which form the abutment surfaces mentioned.
  • the mode of operation corresponds to that described above.

Landscapes

  • Push-Button Switches (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Claims (9)

  1. Dispositif à bouton-poussoir, comprenant une tête de poussoir (1) pouvant être enfoncée d'une position d'utilisation à une position d' enclenchement, en vue de l'actionnement d'un contact de commutation électrique, ainsi qu'un corps de guidage (3) qui est associé à ladite tête sur un agencement supportant le contact de commutation, dispositif dans lequel est interposé, entre la tête de poussoir (1) et le corps de guidage (3), un organe de guidage (8, 28), qui consiste par exemple en un croisillon articulé ou en un étrier et qui, dans la position d'utilisation et dans la position d'enclenchement, s'engage par l'une de ses zones de butée, c'est-à-dire sa première zone de butée (11, 13), dans des fentes de pénétration (24, 24', 25) du corps de guidage (3) et, par son autre zone de butée, c'est-à-dire sa seconde zone de butée (12, 14), dans des logements de la tête de poussoir (1),
    caractérisé par le fait
    qu'un dispositif d'encliquetage (18, 31), ménagé sur le dispositif à bouton-poussoir, retient l'organe de guidage (8, 28) dans une position encliquetée ; par le fait que dans la position encliquetée, lorsque la tête de poussoir (1) est mise en place sur le corps de guidage (3), la première zone de butée (11, 13) de l'organe de guidage (8, 28) se trouve devant des ouvertures (26, 27) des fentes de pénétration (24, 24', 25) ; et par le fait que l'organe de guidage (8, 28) passe de la position encliquetée à la position d'utilisation suite à un enfoncement de la tête de poussoir (1) sur le corps de guidage (3), la première zone de butée (11, 13) parvenant alors dans les fentes de pénétration (24, 24', 25).
  2. Dispositif à bouton-poussoir selon la revendication 1,
    caractérisé par le fait
    que le dispositif d'encliquetage (18, 31) est ménagé sur la tête de poussoir (1).
  3. Dispositif à bouton-poussoir selon la revendication 1 ou 2,
    caractérisé par le fait
    que le dispositif d'encliquetage (18, 31) présente une surface de butée supplémentaire (20) ayant pour effet d'empêcher, lors d'un actionnement du poussoir, que l'organe de guidage (8, 28) passe de la position d'utilisation à la position encliquetée.
  4. Dispositif à bouton-poussoir selon la revendication 3,
    caractérisé par le fait
    que le dispositif d'encliquetage (18, 31) comprend un mentonnet d'encliquetage muni d'une surface de butée (19), et une surface de butée supplémentaire (22, 23).
  5. Dispositif à bouton-poussoir selon la revendication 4,
    caractérisé par le fait
    que la surface de butée supplémentaire (22) est ménagée sur un bras (9) du croisillon articulé (8).
  6. Dispositif à bouton-poussoir selon la revendication 4,
    caractérisé par le fait
    que la surface de butée supplémentaire (23) est façonnée sur le logement (17) de la tête de poussoir (1).
  7. Dispositif à bouton-poussoir selon l'une des revendications 1 à 6,
    caractérisé par le fait
    que le dispositif d'encliquetage (18, 31) est formé par une creusure destinée à une branche (29) de l'étrier (28).
  8. Dispositif à bouton-poussoir selon la revendication 7,
    caractérisé par le fait
    qu'une protubérance (30), affectée à la creusure, est prévue sur la branche (29).
  9. Dispositif à bouton-poussoir selon l'une des revendications 1 à 8,
    caractérisé par le fait
    qu'un téton (12) d'un bras (9) du croisillon articulé (8) peut uniquement tourner dans son logement (15), et un téton (14) de l'autre bras (10) peut coulisser dans son logement (17).
EP88107809A 1987-06-13 1988-05-16 Dispositif de bouton-poussoirs Expired - Lifetime EP0295437B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88107809T ATE98396T1 (de) 1987-06-13 1988-05-16 Drucktasteneinrichtung.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3719839 1987-06-13
DE8708373U DE8708373U1 (de) 1987-06-13 1987-06-13 Drucktasteneinrichtung
DE3719839A DE3719839C1 (de) 1987-06-13 1987-06-13 Drucktasteneinrichtung

Publications (3)

Publication Number Publication Date
EP0295437A2 EP0295437A2 (fr) 1988-12-21
EP0295437A3 EP0295437A3 (en) 1990-06-06
EP0295437B1 true EP0295437B1 (fr) 1993-12-08

Family

ID=29737510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107809A Expired - Lifetime EP0295437B1 (fr) 1987-06-13 1988-05-16 Dispositif de bouton-poussoirs

Country Status (5)

Country Link
US (1) US4902862A (fr)
EP (1) EP0295437B1 (fr)
JP (1) JPS647441A (fr)
DE (2) DE8708373U1 (fr)
ES (1) ES2046233T3 (fr)

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JP3941041B2 (ja) * 2002-03-25 2007-07-04 ミネベア株式会社 キースイッチのスタビライザー機構
TWM343860U (en) * 2008-04-18 2008-11-01 Darfon Electronics Corp Keyswitch and keyboard
CN101834593A (zh) * 2009-03-10 2010-09-15 鸿富锦精密工业（深圳）有限公司 按键结构
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TWI442434B (zh) * 2011-11-30 2014-06-21 Wistron Corp 按鍵結構及應用其之鍵盤結構
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Also Published As

Publication number Publication date
EP0295437A3 (en) 1990-06-06
EP0295437A2 (fr) 1988-12-21
DE8708373U1 (de) 1987-08-13
ES2046233T3 (es) 1994-02-01
US4902862A (en) 1990-02-20
DE3719839C1 (de) 1988-10-13
JPS647441A (en) 1989-01-11

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