EP0295437A2 - Push-button device - Google Patents

Push-button device Download PDF

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Publication number
EP0295437A2
EP0295437A2 EP88107809A EP88107809A EP0295437A2 EP 0295437 A2 EP0295437 A2 EP 0295437A2 EP 88107809 A EP88107809 A EP 88107809A EP 88107809 A EP88107809 A EP 88107809A EP 0295437 A2 EP0295437 A2 EP 0295437A2
Authority
EP
European Patent Office
Prior art keywords
guide member
guide body
button
stop surface
push button
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
EP88107809A
Other languages
German (de)
French (fr)
Other versions
EP0295437A3 (en
EP0295437B1 (en
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/en
Publication of EP0295437A2 publication Critical patent/EP0295437A2/en
Publication of EP0295437A3 publication Critical patent/EP0295437A3/en
Application granted granted Critical
Publication of EP0295437B1 publication Critical patent/EP0295437B1/en
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

  • the invention relates to a pushbutton device with a button head, which can be depressed from an operating position to a switching position for actuating an electrical switching contact, and with a guide body assigned to it on an arrangement carrying the switching contact, a guide member, such as scissors, between the button head and the guide body or bracket is arranged, which in the operating position and in the switching position engages with its first stop area in engagement slots of the guide body and with its other, second stop area in receptacles of the key top.
  • a guide member such as scissors
  • 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 the desired switching process is triggered regardless of the point at which the key head is depressed, without jamming or jamming of the key head interfering with this.
  • 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 for the pins (11, 13), 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 pushing in the direction of 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 moves 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 button head (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 button head (1) When the button (1) is depressed, the bumps (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). In the locked position, 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 portions (32, 32 '), which groove-shaped depressions (31, 31') of the key head (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.

Abstract

A push-button device, having a guide member (8) between a button head (1) and a guide body (3), is intended to be able to be assembled easily. In order to be able to fit the button head (1) carrying the guide member (8) onto the guide body (3) simply, a latching device (18, 22) holds the guide member (8) in a latched position. In the latched position, stop regions (11, 13) of the guide member (8) are located in front of engagement slots (24, 25). If the button head (1) is pressed down, the guide member (8) moves out of the latched position into the operating position. The stop regions (11, 13) pass into the engagement slots (24, 25). <IMAGE>

Description

Die Erfindung betrifft eine Drucktasteneinrichtung mit einem Tastenkopf, der zur Betätigung eines elektrischen Schaltkontakts aus einer Betriebs­stellung in eine Schaltstellung niederdrückbar ist, und mit einem diesem zugeordneten Führungskörper an einer den Schaltkontakt tragenden Anord­nung, wobei zwischen dem Tastenkopf und dem Führungskörper ein Führungs­glied, wie beispielsweise Schere oder Bügel, angeordnet ist, das in der Betriebsstellung und in der Schaltstellung mit seinem einen ersten Anschlagbereich in Eingriffsschlitze des Führungskörpers und mit seinem anderen, zweiten Anschlagbereich in Aufnahmen des Tastenkopfs eingreift.The invention relates to a pushbutton device with a button head, which can be depressed from an operating position to a switching position for actuating an electrical switching contact, and with a guide body assigned to it on an arrangement carrying the switching contact, a guide member, such as scissors, between the button head and the guide body or bracket is arranged, which in the operating position and in the switching position engages with its first stop area in engagement slots of the guide body and with its other, second stop area in receptacles of the key top.

Solche Drucktasteneinrichtungen sind bereits bekannt (DE-OS 33 29 698); dort ist das Führungsglied von einer Doppelschere gebildet. Dadurch ist auch bei vergleichsweise großen Tastenköpfen eine sichere Parallel­führung des Tastenkopfes gegenüber dem Führungskörper erreicht. Eine solche Parallelführung gewährleistet, daß unabhängig davon, an welcher Stelle der Tastenkopf niedergedrückt wird, der gewünschte Schaltvorgang ausgelöst wird, ohne daß ein Verkanten oder Verklemmen des Tastenkopfes dies behindert.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 the desired switching process is triggered regardless of the point at which the key head is depressed, without jamming or jamming of the key head interfering with this.

Es sind weiterhin Drucktasteneinrichtungen bekannt, bei denen als Führungsglied ein Bügel vorgesehen ist. Ein derartiges Führungsglied wird meist bei sehr langen Tastenköpfen verwendet.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.

Bei den bekannten Drucktasteneinrichtungen ist die Montage des das Führungsglied tragenden Tastenkopfes an den Führungskörper umständlich. Denn das bewegliche Führungsglied muß vom Rand in die Eingriffsschlitze des Führungskörpers eingeführt werden, wobei gleichzeitig der Tasten­kopf in einer ausgerichteten Lage gehalten werden muß.In the known push button devices, 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.

Aufgabe der Erfindung ist es, eine Drucktasteneinrichtung der eingangs genannten Art so zu verbessern, daß sich der Tastenkopf mit dem Führungsglied auf einfache Weise und ohne Beeinträchtigung benach­barter Einrichtungen an dem Führungskörper montieren und demontieren läßt. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß an der Drucktasteneinrichtung eine Rasteinrichtung ausgebildet ist, die das Führungsglied in einer Raststellung hält, daß in der Raststellung bei auf den Führungskörper aufgesetztem Tastenkopf der erste Anschlagbereich des Führungsgliedes vor Öffnungen der Eingriffsschlitze liegt und daß durch Niederdrücken des Tastenkopfes auf den Führungskörper das Führungsglied aus der Raststellung in die Betriebsstellung übergeht, wobei der erste Anschlagbereich in die Eingriffsschlitze gelangt.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.

Dadurch braucht hier vorteilhafterweise bei der Montage des Tastenkopfes am Führungskörper nicht manipuliert zu werden; außerdem sind hier keine besonderen Montagevorrichtungen nötig. Da die Montage in Betätigungs­richtung des Tastenkopfes von oben erfolgt, ist sie hier auch dann durchführbar, wenn in der Umgebung des Tastenkopfes bereits andere Tastenköpfe montiert sind.As a result, there is advantageously no need to manipulate when mounting the key head on the guide body; in addition, no special assembly devices are required here. Since the assembly is carried out from above in the direction of actuation of the button head, it can also be carried out here if other button heads are already installed in the vicinity of the button head.

Günstig ist auch, daß sich im Bedarfsfalle der Tastenkopf mit dem Führungsglied nach oben abziehen läßt. Dadurch ist nachträglich die Stellung des Tastenkopfes gegenüber dem Führungskörper, z.B. durch Ver­setzen oder Verdrehen des Tastenkopfes, veränderbar. Dies ist dann von Vorteil, wenn mit dem Tastenkopf wahlweise einer von mehreren, in dem Führungskörper vorgesehenen, oder von im Raster liegenden, benachbarten Schaltkontakten betätigbar ist.It is also favorable that, if necessary, 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.

Im folgenden werden Ausführungsbeispiele der Erfindung anhand von Zeichnungen näher erläutert. Es zeigen:

  • Figur 1 eine Drucktasteneinrichtung in Raststellung im Schnitt,
  • Figur 2 die Drucktasteneinrichtung in der Betriebsstellung im Schnitt,
  • Figur 3 eine Alternative zur Gestaltung des Tastenkopfes nach Figur 1,
  • Figur 4 eine weitere Alternative zur Gestaltung des Tastenkopfes nach Figur 1,
  • Figur 5 ein weiteres Ausführungsbeispiel der Drucktasteneinrichtung mit einem Bügel im Schnitt,
  • Figur 6 eine Aufsicht der Drucktasteneinrichtung nach Figur 5 im Schnitt,
  • Figur 7 ein weiteres Ausführungsbeispiel der Drucktasteneinrichtung mit einem Bügel
    und
  • Figur 8 eine Aufsicht auf die Drucktasteneinrichtung nach Figur 7 im Schnitt.
Exemplary embodiments of the invention are explained in more detail below with reference to drawings. Show it:
  • FIG. 1 shows a pushbutton device in the locking position in section,
  • FIG. 2 shows the pushbutton device in the operating position on average,
  • FIG. 3 shows an alternative to the design of the key head according to FIG. 1,
  • FIG. 4 shows a further alternative to the design of the key head according to FIG. 1,
  • FIG. 5 shows a further exemplary embodiment of the pushbutton device with a bracket in section,
  • FIG. 6 is a sectional view of the pushbutton device according to FIG. 5,
  • Figure 7 shows another embodiment of the push button device with a bracket
    and
  • Figure 8 is a plan view of the push button device of Figure 7 in section.

Eine Drucktasteneinrichtung weist einen Tastenkopf (1) auf. An diesem ist ein zylindrischer Tastenstößel (2) ausgebildet. Dem Tastenkopf (1) ist ein Führungskörper (3) zugeordnet, der aus gleichen symmetrisch ge­stalteten Führungskörperteilen (3′, 3˝ ) zusammengesetzt ist. Am Füh­rungskörper (3) ist eine Führungshülse (4) für den Tastenstößel (2) aus­gebildet. Der Führungskörper (3) ist an einer Platte (5) befestigt, an der eine Schaltfolie (6) angeordnet ist. Ein Schaltdom (7) der Schalt­folie (6) liegt im Grund der Führungshülse (4).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).

Zwischen dem Tastenkopf (1) und dem Führungskörper (3) ist als Führungsglied eine Schere (8) vorgesehen, die zwei Arme (9,10) aufweist. An den beiden Enden jedes Arms (9, 10) ist ein Zapfen (11 bis 14) ausge­bildet.Between the button head (1) and the guide body (3) 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).

Beim Ausführungsbeispiel nach den Figuren 1 bis 3 ist am Tastenkopf (1) eine Aufnahme (15) vorgesehen, in der eine Lagerschale (16) für den Zapfen (12) ausgeformt ist. Der Zapfen (12) ist damit in der Aufnahme (15) drehbar, jedoch unverschieblich gelagert.In the embodiment according to FIGS. 1 to 3, 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.

Am Tastenkopf (1) ist weiterhin eine Aufnahme (17) für den Zapfen (14) des Armes (10) vorgesehen. In der Aufnahme (17) ist ein Rastnocken (18) ausgeformt. Dieser bildet einerseits eine Anschlagfläche (19) und andererseits eine Anschlagfläche (20) für den Zapfen (14) (vgl. Figuren 1 bis 4).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).

Bei der Ausführung nach Figur 1 ist im Bereich der Gelenkstelle (21) der Schere (8) ein Anschlag (22) ausgebildet. Dieser verhindert, daß die Arme (9, 10) in Richtung der Pfeile (A) weiter aufeinander zubewegt werden können, als dies in Figur 1 dargestellt ist.In the embodiment according to FIG. 1, 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.

Bei den Ausführungsbeispielen nach den Figuren 3 und 4 ist anstelle des Anschlags (22) bei der Aufnahme (17) eine weitere Anschlagfläche (23) vorgesehen.In the exemplary embodiments according to FIGS. 3 and 4, a further stop surface (23) is provided instead of the stop (22) in the receptacle (17).

Beim Ausführungsbeispiel nach Figur 4 ist in der Aufnahme (15) anstelle der Lagerschale (16) ein Rastnocken (18) mit Anschlagflächen (19, 20) und eine Anschlagfläche (23) vorgesehen. Die Gestaltung der Aufnahme (15) entspricht also der Gestaltung der Aufnahme (17).In the exemplary embodiment according to FIG. 4, 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).

An dem Führungskörper (3) sind für die Zapfen (11, 13) Eingriffsschlitze (24, 25) ausgebildet, die einseitig Öffnungen (26, 27) aufweisen.On the guide body (3) engagement slots (24, 25) are formed for the pins (11, 13), which have openings (26, 27) on one side.

Die Funktionsweise der beschriebenen Einrichtung ist etwa folgende:The functioning of the described device is approximately as follows:

Vor der Montage des Tastenkopfes (1) an dem Führungskörper (3) wird die Schere (8) am Tastenkopf (1) in eine Raststellung gebracht. In der Rast­stellung ist der Arm (10) und damit auch der Arm (9) blockiert. Beim Ausführungsbeispiel nach Figur 1 ist dies dadurch erreicht, daß der Zapfen (14) an der Anschlagfläche (19) des Rastnockens (18) anliegt und die Arme (9, 10) am Anschlag (22) aneinander anstehen. Beim Ausführungs­beispiel nach Figur 3 ist dies dadurch erreicht, daß der Zapfen (14) zwischen der Anschlagfläche (19) und der Anschlagfläche (23) gehalten ist. Beim Ausführungsbeispiel nach Figur 4 ist dies dadurch erreicht, daß auch der Zapfen (12) in der Aufnahme (15) zwischen der Anschlag­fläche (19) und der Anschlagfläche (23) gehalten ist.Before mounting the button head (1) on the guide body (3), the scissors (8) on the button head (1) are brought into a detent position. In the locked position, the arm (10) and thus also the arm (9) is blocked. In the embodiment according to FIG. 1, 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). In the embodiment of Figure 3, this is achieved in that the pin (14) between the stop surface (19) and the stop surface (23) is held. In the exemplary embodiment according to FIG. 4, 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).

Der Tastenkopf (1) wird dann mit der Schere (8) in Raststellung ausge­richtet auf den Führungskörper (3) gesetzt. Dabei greift der Tasten­stößel (2) in die jeweilige Führungshülse (4). Die Zapfen (11,13) liegen bei den Öffnungen (26, 27) der Eingriffsschlitze (24,25) und stehen dann auf dem Grund der Eingriffsschlitze (24, 25) auf.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).

Anschließend wird dann in Richtung des Pfeiles (B) auf den Tastenkopf (1) gedrückt. Der Zapfen (14) schnappt dadurch über die Anschlagfläche (19) des Rastnockens (18) in die Aufnahme (17). Beim Ausführungsbeispiel nach Figur 4 schnappt auch der Zapfen (12) über die Anschlagfläche (19) des Rastnockens (18) der Aufnahme (15). Die Zapfen (11, 13) gelangen in die Eingriffsschlitze (24, 25). Der Tastenkopf (1) steht jetzt in seiner Betriebsstellung (vgl. Figur 2). Aus der Betriebsstellung ist der Tastenkopf (1) durch weiteres Drücken in Richtung des Pfeiles (B) in seine Schaltstellung zu bringen, in der der Tastenstößel (2) den Schalt­dom (7) so niederdrückt, daß in ihm angeordnete elektrische Kontakte geschlossen sind. Bei der Bewegung des Tastenkopfes (1) zwischen der Betriebstellung und der Schaltstellung verschieben sich die Zapfen (11, 13) in den Eingriffsschlitzen (24 bzw. 25) in Richtung der Pfeile (C). Der Zapfen (14) verschiebt sich entsprechend in der Aufnahme (17). Beim Ausführungsbeispiel nach Figur 4 verschiebt sich entsprechend auch der Zapfen (12) in der Aufnahme (15).Then press the button (1) in the direction of arrow (B). The pin (14) thus snaps over the stop surface (19) of the locking cam (18) into the receptacle (17). In the embodiment of Figure 4, the pin (12) snaps over the stop surface (19) of the locking cam (18) of the receptacle (15). The pins (11, 13) enter 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 pushing in the direction of 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. When the button head (1) moves between the operating position and the switching position, 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). In the embodiment according to FIG. 4, the pin (12) in the receptacle (15) also moves accordingly.

Die Rückstellung des Tastenkopfes (1) aus der Schaltstellung in die Betriebsstellung erfolgt durch die Federelastizität des Schaltdomes (7). Die Rückbewegung in die Betriebsstellung ist durch das Anschlagen des Zapfens (14) an der Anschlagfläche (20) des Rastnockens (18) begrenzt.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).

Soll der Tastenkopf (1) demontiert werden, dann wird er entgegen der Richtung des Pfeiles (B) hochgezogen. Dabei rastet der Zapfen (14) über die Anschlagfläche (20), so daß er wieder in die in Figur 1 dargestellte Lage gerät. In dieser Stellung liegen die Zapfen (11, 13) in den Öffnungen (26, 27), so daß sich der Tastenkopf (1) mit der Schere (8) von dem Führungskörper (3) abnehmen läßt. Die Schere (8) kann dabei von selbst in die Raststellung gelangen.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. In this position, the pins (11, 13) lie in the openings (26, 27) so that the button head (1) can be removed from the guide body (3) with the scissors (8). The scissors (8) can automatically move into the locked position.

Der Tastenkopf (1) mit der Schere (8) kann dann gegen den Führungs­körper (3) so gedreht werden, daß der Schaltstößel (2) in die Führungs­hülse (4′) des Führungskörperteils (3′) greift und dementsprechend einem anderen Schaltdom zugeordnet ist.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 .

Bei den Ausführungsbeispielen nach den Figuren 5 bis 8 ist das Führungsglied von einem Bügel (28) gebildet.In the exemplary embodiments according to FIGS. 5 to 8, the guide member is formed by a bracket (28).

Beim Ausführungsbeispiel nach Figur 5 und 6 weist der Bügel (28) Zapfen (12, 12′) auf, die in Aufnahmen (15) des Tastenkopfes (1) drehbar ge­lagert sind. An Schenkeln (29, 29′) des Bügels (28) sind Höcker (30,30′) ausgebildet, denen Vertiefungen (31, 31′) des Tastenkopfes (1) zugeord­net sind. Die Schenkel (29, 29′) sind weiterhin mit Zapfen (11, 11′) versehen. Für die Zapfen (11, 11′) sind an den Führungskörper (3) Ein­griffsschlitze (24, 24′) ausgebildet.In the embodiment of Figures 5 and 6, the bracket (28) has pins (12, 12 ') which are rotatably mounted in receptacles (15) of the key head (1). On legs (29, 29 ') of the bracket (28) 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'). For the pin (11, 11 ') on the guide body (3) engagement slots (24, 24') are formed.

In der Raststellung greifen die Höcker (30, 30′) in die Vertiefungen (31, 31′). Wird der Tastenkopf (1) auf den Führungskörper (3) aufge­setzt, dann liegen in der Raststellung des Bügels (28) die Zapfen (11, 11′) vor den Eingriffsschlitzen (24, 24′).In the locked position, 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).

Beim Niederdrücken des Tastenkopfes (1) lösen sich die Höcker (30, 30′) aus den Vertiefungen (31, 31′) und die Zapfen (11, 11′) gelangen in die Eingriffsschlitze (24, 24′). Der Tastenkopf (1) ist dann zwischen seiner Betriebsstellung und seiner Schaltstellung beweglich. Die Höcker (30, 30′) sind dabei in Freiräumen (32, 32′) frei verschieblich. Die Ver­tiefung (31, 31′) bildet die Anschlagflächen (19, 20, 23) für den Höcker (30). In der Raststellung liegt der Höcker (30) zwischen den Anschlag­flächen (19, 23). Beim Zurückgehen des Tastenkopfes (1) aus der Schalt­stellung trifft der Höcker (30) auf die Anschlagfläche (20). Ent­sprechendes gilt für den Höcker (30′).When the button (1) is depressed, the bumps (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). In the locked position, the hump (30) lies between the stop surfaces (19, 23). When the button head (1) returns from the switching position, the hump (30) hits the stop surface (20). The same applies to the hump (30 ').

Beim Ausführungsbeispiel nach den Figuren 7 und 8 ist der Bügel (28) ein Drahtbügel. Seine Enden bilden die Zapfen (11, 11′). Der Bügel (28) weist Schenkelabschnitte (32, 32′) auf, denen rillenförmige Vertiefungen (31, 31′) des Tastenkopfes (1) zugeordnet sind. In der Raststellung sind die Schenkelabschnitte (32, 32′) in die Vertiefungen (31, 31′) einge­rastet, die die genannten Anschlagflächen bilden. Die Funktionsweise entspricht dem oben Beschriebenen.In the embodiment of Figures 7 and 8, the bracket (28) is a wire bracket. Its ends form the pins (11, 11 '). The bracket (28) has leg portions (32, 32 '), which groove-shaped depressions (31, 31') of the key head (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.

Bezugszeichenliste 07/87 Pt. + GMReference number list 07/87 Pt. + GM

  • 1 Tastenkopf1 button head
  • 2 Tastenstößel2 push buttons
  • 3 Führungskörper3 guide bodies
  • 4 Führungshülse4 guide sleeve
  • 5 Platte5 plate
  • 6 Schaltfolie6 switching foil
  • 7 Schaltdom7 switch dome
  • 8 Schere8 scissors
  • 9 (Scheren-)Arm9 (scissors) arm
  • 10 (Scheren-)Arm10 (scissors) arm
  • 11 Zapfen11 cones
  • 12 Zapfen12 cones
  • 13 Zapfen13 cones
  • 14 Zapfen14 cones
  • 15 Aufnahme15 recording
  • 16 Lagerschale16 bearing shell
  • 17 Aufnahme17 recording
  • 18 Rastnocken18 locking cams
  • 19 Anschlagfläche19 stop surface
  • 20 Anschlagfläche20 stop surface
  • 21 Gelenkstelle21 joint
  • 22 Anschlag22 stop
  • 23 Anschlagfläche23 stop surface
  • 24 Eingriffsschlitz24 engagement slot
  • 25 Eingriffsschlitz25 engagement slot
  • 26 Öffnung26 opening
  • 27 Öffnung27 opening
  • 28 Bügel28 stirrups
  • 29 Schenkel29 legs
  • 30 Höcker30 humps
  • 31 Vertiefung31 deepening
  • 32 Freiraum32 free space
  • A BewegungsrichtungA direction of movement
  • B DruckrichtungB printing direction
  • C VerschieberichtungC direction of displacement

Claims (9)

1. Drucktasteneinrichtung mit einem Tastenkopf, der zur Betätigung eines elektrischen Schaltkontakts aus einer Betriebsstellung in eine Schaltstellung niederdrückbar ist und mit einem diesem zugeordneten Führungskörper an einer den Schaltkontakt tragenden Anordnung, wobei zwischen dem Tastenkopf und dem Führungskörper ein Führungsglied, wie beispielsweise Schere oder Bügel, angeordnet ist, das in der Betriebsstellung und in der Schaltstellung mit seinem einen, ersten Anschlagbereich in Eingriffsschlitze des Führungskörpers und mit seinem anderen, zweiten Anschlagbereich in Aufnahmen des Tasten­kopfs eingreift,
dadurch gekennzeichnet,
daß an der Drucktasteneinrichtung eine Rasteinrichtung (18, 31) aus­gebildet ist, die das Führungsglied (8, 28) in einer Raststellung hält, daß in der Raststellung bei auf den Führungskörper (3) aufgesetztem Tastenkopf (1) der erste Anschlagbereich (11, 13) des Führungsgliedes (8, 28) vor Öffnungen (26, 27) der Eingriff­schlitze (24, 24′, 25) liegt und daß durch Niederdrücken des Tastenkopfes (1) auf den Führungskörper (3) das Führungsglied (8, 28) aus der Raststellung in die Betriebsstellung übergeht, wobei der erste Anschlagbereich (11, 13) in die Eingriffsschlitze (24, 24′, 25) gelangt.1. Pushbutton device with a button head which can be depressed from an operating position into a switching position for actuation of an electrical switching contact and with a guide body assigned to it on an arrangement carrying the switching contact, a guide member, such as scissors or brackets, between the button head and the guide body. is arranged, which in the operating position and in the switching position engages with its one, first stop area in engagement slots of the guide body and with its other, second stop area in receptacles of the key top,
characterized,
that a latching device (18, 31) is formed on the pushbutton device, which holds the guide member (8, 28) in a latched position, ) of the guide member (8, 28) in front of openings (26, 27) of the engagement slots (24, 24 ', 25) and that by pressing the button (1) on the guide body (3) the guide member (8, 28) from the Locking position passes into the operating position, the first stop region (11, 13) entering the engagement slots (24, 24 ', 25). 2. Drucktasteneinrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Rasteinrichtung (18, 31) am Tastenkopf (1) ausgebildet ist.2. Push button device according to claim 1,
characterized,
that the locking device (18, 31) is formed on the key top (1). 3. Drucktasteneinrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Rasteinrichtung (18, 31) eine weitere Anschlagfläche (20) aufweist, die bei einer Tastenbetätigung verhindert, daß das Führungsglied (8, 28) von der Betriebsstellung in die Raststellung übergeht.3. Push button device according to claim 1 or 2,
characterized,
that the latching device (18, 31) has a further stop surface (20) which, when a button is pressed, prevents the guide member (8, 28) from changing from the operating position into the latched position. 4. Drucktasteneinrichtung nach Anspruch 3,
dadurch gekennzeichnet,
daß die Rasteinrichtung (18, 31) einen Rastnocken mit einer Anschlagfläche (19) und eine weitere Anschlagfläche (22, 23) auf­weist.4. push button device according to claim 3,
characterized,
that the locking device (18, 31) has a locking cam with a stop surface (19) and a further stop surface (22, 23). 5. Drucktasteneinrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß die weitere Anschlagfläche (22) an einem Arm (9) der Schere (8) ausgebildet ist.5. Push button device according to claim 4,
characterized,
that the further stop surface (22) is formed on an arm (9) of the scissors (8). 6. Drucktasteneinrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß die weitere Anschlagfläche (23) an der Aufnahme (17) des Tasten­kopfes (1) ausgebildet ist.6. Push button device according to claim 4,
characterized,
that the further stop surface (23) on the receptacle (17) of the key head (1) is formed. 7. Drucktasteneinrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß die Rasteinrichtung (18, 31) von einer Vertiefung für einen Schenkel (29) des Bügels (28) gebildet ist.7. Pushbutton device according to one of claims 1 to 6,
characterized,
that the locking device (18, 31) is formed by a recess for a leg (29) of the bracket (28). 8. Drucktasteneinrichtung nach Anspruch 7,
dadurch gekennzeichnet,
daß am Schenkel (29) ein der Vertiefung zugeordneter Höcker (30) vorgesehen ist.8. Push button device according to claim 7,
characterized,
that a hump (30) assigned to the depression is provided on the leg (29). 9. Drucktasteneinrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
daß ein Zapfen (12) eines Armes (9) der Schere (8) in seiner Auf­nahme (15) nur drehbar und ein Zapfen (14) des anderen Armes (10) in seiner Aufnahme (17) verschieblich ist.9. Pushbutton device according to one of claims 1 to 8,
characterized,
that a pin (12) of an arm (9) of the scissors (8) in its receptacle (15) is only rotatable and a pin (14) of the other arm (10) is displaceable in its receptacle (17).
EP88107809A 1987-06-13 1988-05-16 Push-button device Expired - Lifetime EP0295437B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88107809T ATE98396T1 (en) 1987-06-13 1988-05-16 PUSH BUTTON SETUP.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3719839A DE3719839C1 (en) 1987-06-13 1987-06-13 Push button setup
DE8708373U DE8708373U1 (en) 1987-06-13 1987-06-13
DE3719839 1987-06-13

Publications (3)

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

Family

ID=29737510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107809A Expired - Lifetime EP0295437B1 (en) 1987-06-13 1988-05-16 Push-button device

Country Status (5)

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

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EP0134509A2 (en) * 1983-08-17 1985-03-20 Preh-Werke GmbH &amp; Co. KG Push button
US4535210A (en) * 1984-04-18 1985-08-13 Illinois Tool Works Inc. Keyswitch stabilizing device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543649A2 (en) * 1991-11-19 1993-05-26 Brother Kogyo Kabushiki Kaisha Keyswitch assembly
EP0543649A3 (en) * 1991-11-19 1993-07-07 Brother Kogyo Kabushiki Kaisha Keyswitch assembly
US5278372A (en) * 1991-11-19 1994-01-11 Brother Kogyo Kabushiki Kaisha Keyboard having connecting parts with downward open recesses
US5280147A (en) * 1991-11-19 1994-01-18 Brother Kogyo Kabushiki Kaisha Keyswitch assembly with a key support limiting transverse, longitudinal and rotational movement of the key
US5278374A (en) * 1992-02-14 1994-01-11 Brother Kogyo Kabushiki Kaisha Assembly with an asymmetrical resilient spring
US5278371A (en) * 1992-02-14 1994-01-11 Brother Kogyo Kabushiki Kaisha Keyswitch assembly with support mechanism coupled to support plate beneath printed circuit board
EP0564230A1 (en) * 1992-03-30 1993-10-06 Brother Kogyo Kabushiki Kaisha Keyswitch assembly
US5329084A (en) * 1992-03-30 1994-07-12 Brother Kogyo Kabushiki Kaisha Keyswitch assembly
EP0619588A1 (en) * 1993-04-05 1994-10-12 Brother Kogyo Kabushiki Kaisha Key switch device
EP0652577A1 (en) * 1993-11-05 1995-05-10 Brother Kogyo Kabushiki Kaisha Key switch having elastic portions for facilitating attachment of scissors-type support linkage to keytop and holder, and removal of keytop from linkage

Also Published As

Publication number Publication date
US4902862A (en) 1990-02-20
EP0295437A3 (en) 1990-06-06
DE3719839C1 (en) 1988-10-13
JPS647441A (en) 1989-01-11
ES2046233T3 (en) 1994-02-01
EP0295437B1 (en) 1993-12-08
DE8708373U1 (en) 1987-08-13

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