EP0855728B1 - Pushbutton - Google Patents

Pushbutton Download PDF

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Publication number
EP0855728B1
EP0855728B1 EP98100414A EP98100414A EP0855728B1 EP 0855728 B1 EP0855728 B1 EP 0855728B1 EP 98100414 A EP98100414 A EP 98100414A EP 98100414 A EP98100414 A EP 98100414A EP 0855728 B1 EP0855728 B1 EP 0855728B1
Authority
EP
European Patent Office
Prior art keywords
pushbutton
housing
button
push button
actuating element
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
EP98100414A
Other languages
German (de)
French (fr)
Other versions
EP0855728A2 (en
EP0855728A3 (en
Inventor
Ingo Dipl.-Ing. Bally (Fh)
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP0855728A2 publication Critical patent/EP0855728A2/en
Publication of EP0855728A3 publication Critical patent/EP0855728A3/en
Application granted granted Critical
Publication of EP0855728B1 publication Critical patent/EP0855728B1/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
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/52—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state immediately upon removal of operating force, e.g. bell-push switch

Definitions

  • the present invention relates to a push button according to the preamble of Claim 1.
  • Such a pushbutton is known from G 85 10 147, with the key cap Spring elements are molded.
  • the object of the present invention is to improve the push button.
  • Push button according to the features of the patent claim 1 reached.
  • Favorable spring properties with a small overall width of the Pushbuttons can be easily implemented in terms of production, if that Has spring element to at least one spring arm, which is essentially in a Level, meandering along the longitudinal axis of the actuating element extends.
  • the spring is then particularly robust and inexpensive for bending or Torsional stresses designed if the spring arm is not only in one plane, but in all three levels, possibly similar to a helix, along the Connecting element extends.
  • the pushbuttons can be spaced a short distance apart are held together in the housing.
  • the actuating element advantageously has a latching element for holding the Push button in the housing. This allows the push button to be installed in the housing First be held captive in this, before the housing cover with the appropriate openings for the push button mounted on the housing becomes.
  • the touch element or in particular the actuator has a stop through which the displacement of the push button is limited inside the housing.
  • the push button is advantageously under tension mounted in the housing or the front panel.
  • the push button is advantageously made in one piece using injection molding technology and from plastic.
  • the demolding direction is for the injection molding production of the push button perpendicular to Oriented longitudinal axis of the actuator and the push button in this regard undercut free. Two simple designs can thus be used in the production Tool halves without slider or other aids by linear expansion generate the complete push button ready for installation.
  • a housing 1 In or on a housing 1 is a housing 1 forming or covering sections Front panel 3 attached (not shown).
  • the housing 1 faces behind the front panel 3 a plate-shaped bracket section 5.
  • Behind this inside the housing 1 a circuit board 7 is arranged at a distance from the front panel 3.
  • On the circuit board 7 is a short-stroke key 9 fastened with the aid of a in the housing 1 or the front panel 3rd held push button 11 is actuated from plastic.
  • the front panel 3 has a circular aperture 13 and in a corresponding Extension has the holding section 5 of the housing 1 in the direction of the Printed circuit board 7 to tapered sleeve 15.
  • the one-piece push button 11 projects with a push button head 17, on which a push button cap 19 is fastened, into the aperture 13 or out of this to the front.
  • An annular shoulder 21 of the cap 19 engages behind the front panel 3 and secures the push button 11 captively in the housing 1 when the Front panel 3 is attached to the housing 1.
  • the pushbutton rod 23 has a stop disk 25 which is connected to a corresponding paragraph 26 of the housing 1 or the bracket portion 5 as a path limitation serves for the push button 11.
  • a stop disk 25 which is connected to a corresponding paragraph 26 of the housing 1 or the bracket portion 5 as a path limitation serves for the push button 11.
  • two spring slots 27 formed as a damping element in the axial Load the push button 11 serve.
  • the spring slots 27 or the thereby formed Damping element in the key rod 23 is prevented in the case of less favorable Housing and push button tolerances when pressing the push button 11 on the short-stroke key 9 too much force is exerted on them.
  • a stylus bead 29 is formed on the stylus rod 23. This is the push button 11 captive in the sleeve 15 of the housing 1 by inserting it before the push button 11 with the attached cap 19 by mounting the front panel 3 finally is fixed in the housing 1.
  • this has a spring element 31.
  • This is formed by two spring arms 33, which are on both sides of the push rod 23 essentially parallel to this from the probe head 17 up to the stop disk 25 extend and end there freely.
  • the spring arms 33 are meandering and are supported with their free end section on the mounting section 5 of the housing.
  • the pushbutton 11 is mounted under tension behind the front panel 3, whereby a defined fit of the push button 11 and a pleasant operating feeling are achieved.
  • the Spring arms 33 are formed in the area of the probe head 17 and stabilize them three-dimensional meandering extension of the pushbutton 11 during its displacement movement in the housing 1.
  • the push button 11 with all its functional elements is formed in one piece and in Injection molding technology manufactured.
  • the spring elements 33 or Spring slots 27 designed so that a production with the simplest tools without Slider is possible.
  • the push button 11 is in relation to a direction of removal (arrows in Fig. 2) perpendicular to the longitudinal axis of the push rod 23 formed without undercuts.

Landscapes

  • Push-Button Switches (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Massaging Devices (AREA)
  • Eye Examination Apparatus (AREA)

Description

Die vorliegende Erfindung betrifft einen Drucktaster nach dem Oberbegriff des Patentanspruches 1.The present invention relates to a push button according to the preamble of Claim 1.

Ein derartiger Drucktaster ist bekannt aus der G 85 10 147, wobei an die Tastenkappe Federelemente angespritzt sind.Such a pushbutton is known from G 85 10 147, with the key cap Spring elements are molded.

Weitere Drucktaster gemäß dem Oberbegriff des Patentanspruches 1 sind bekannt aus den Druckschriften US 4,463,237 sowie EP 0 407 754 A2.Other push buttons according to the preamble of claim 1 are known from the publications US 4,463,237 and EP 0 407 754 A2.

Ein weiterer Drucktaster ist bekannt aus der deutschen Offenlegungsschrift DE 30 37 448 A1, wobei der Aufbau des Drucktasters sowie dessen Einbau in das Gehäuse aufwendig und umständlich sind.Another pushbutton is known from German Offenlegungsschrift DE 30 37 448 A1, the structure of the push button and its installation in the housing being complex and are cumbersome.

Aufgabe der vorliegenden Erfindung ist es, den Drucktaster zu verbessern.The object of the present invention is to improve the push button.

Erfindungsgemäß ist dies bei einem Drucktaster gemäß den Merkmalen des Patentanspruchs 1 erreicht. Günstige Federeigenschaften bei gleichzeitig geringer Baubreite des Drucktasters können fertigungstechnisch einfach realisiert werden, wenn das Federelement zu mindestens einen Federarm aufweist, der sich im wesentlichen in einer Ebene erstreckend, mäanderförmig entlang der Längsachse des Betätigungselementes erstreckt. Die Feder ist dann besonders robust und günstig für Biege- bzw. Torsionsbeanspruchungen ausgelegt, wenn sich der Federarm nicht nur in einer Ebene, sondern in allen drei Ebenen, ggfs. ähnlich einer Schraubenlinie, entlang des Verbindungselementes erstreckt. Die Drucktaster können mit geringem seitlichen Abstand zueinander im Gehäuse gehaltert werden.According to the invention, this is the case with a push button according to the features of the patent claim 1 reached. Favorable spring properties with a small overall width of the Pushbuttons can be easily implemented in terms of production, if that Has spring element to at least one spring arm, which is essentially in a Level, meandering along the longitudinal axis of the actuating element extends. The spring is then particularly robust and inexpensive for bending or Torsional stresses designed if the spring arm is not only in one plane, but in all three levels, possibly similar to a helix, along the Connecting element extends. The pushbuttons can be spaced a short distance apart are held together in the housing.

Vorteilhafterweise weist das Betätigungselement ein Rastelement auf zum Haltern des Drucktasters im Gehäuse. Dadurch kann der Drucktaster beim Einbau in das Gehäuse zunächst unverlierbar in diesem gehaltert werden, bevor anschließend die Gehäuseblende mit den entsprechenden Öffnungen für den Drucktaster an das Gehäuse montiert wird. The actuating element advantageously has a latching element for holding the Push button in the housing. This allows the push button to be installed in the housing First be held captive in this, before the housing cover with the appropriate openings for the push button mounted on the housing becomes.

Gemäß einer bevorzugten Ausführungsform weist das Tastelement oder insbesondere das Betätigungselement einen Anschlag auf, durch den der Verschiebeweg des Drucktasters ins Innere des Gehäuses begrenzt ist. Bei entsprechender Dimensionierung der Gehäusegeometrie bzw. des Drucktasters kann so sichergestellt werden, dass auch bei starkem Druck auf das Tastelement eine Beschädigung des zu betätigenden Kontaktes oder der zu betätigenden Taste ausgeschlossen ist, die beispielsweise auf einer Leiterplatte gehäusefest angeordnet sind.According to a preferred embodiment, the touch element or in particular the actuator has a stop through which the displacement of the push button is limited inside the housing. With appropriate dimensioning of the Housing geometry or the push button can be ensured that even with strong pressure on the sensing element damage the contact to be actuated or the button to be pressed is excluded, for example on a circuit board are fixed to the housing.

Um eine definierte Stellung des Drucktasters in der Frontblende und ein angenehmes Bediengefühl gewährleisten zu können, ist der Drucktaster vorteilhafterweise unter Vorspannung im Gehäuse bzw. der Frontblende montiert.To a defined position of the push button in the front panel and a pleasant one To be able to guarantee operating feeling, the push button is advantageously under tension mounted in the housing or the front panel.

Vorteilhafterweise ist der Drucktaster einteilig in Spritzgießtechnik und aus Kunststoff hergestellt. Um die Fertigungstechnik besonders einfach gestalten zu können, ist die Entformungsrichtung für die spritzgießtechnische Herstellung des Drucktasters senkrecht zur Längsachse des Betätigungselementes orientiert und der Drucktaster diesbezüglich hinterschnittfrei ausgebildet. Bei der Herstellung können also zwei einfach ausgestaltete Werkzeughälften ohne Schieber oder andere Hilfsmittel durch lineares Auseinanderfahren den vollständigen Drucktaster einbaufertig erzeugen.The push button is advantageously made in one piece using injection molding technology and from plastic. In order to make the manufacturing technology particularly simple, the demolding direction is for the injection molding production of the push button perpendicular to Oriented longitudinal axis of the actuator and the push button in this regard undercut free. Two simple designs can thus be used in the production Tool halves without slider or other aids by linear expansion generate the complete push button ready for installation.

Nachfolgend ist anhand schematischer Darstellungen ein Ausführungsbeispiel des erfindungsgemäßen Drucktasters beschrieben:Below is an embodiment of the invention based on schematic representations Push button described:

Es zeigen

Fig. 1
eine schematisierte abschnittsweise Schnittdarstellung des in ein Gehäuse eingebauten Drucktasters und
Fig. 2
in einer perspektivischen Ansicht in vergrößertem Maßstab den Drucktaster.
Show it
Fig. 1
a schematic sectional view of the push button installed in a housing and
Fig. 2
the push button in a perspective view on an enlarged scale.

In bzw. an einem Gehäuse 1 ist eine das Gehäuse 1 abschnittsweise bildende oder bedeckende Frontblende 3 befestigt (nicht gezeigt). Das Gehäuse 1 weist hinter der Frontblende 3 einen plattenförmigen Halterungsabschnitt 5 auf. Hinter diesem im Inneren des Gehäuses 1 ist mit Abstand zur Frontblende 3 eine Leiterplatte 7 angeordnet. Auf der Leiterplatte 7 ist eine Kurzhubtaste 9 befestigt, die mit Hilfe eines im Gehäuse 1 bzw. der Frontblende 3 gehalterten Drucktasters 11 aus Kunststoff betätigbar ist.In or on a housing 1 is a housing 1 forming or covering sections Front panel 3 attached (not shown). The housing 1 faces behind the front panel 3 a plate-shaped bracket section 5. Behind this inside the housing 1 a circuit board 7 is arranged at a distance from the front panel 3. On the circuit board 7 is a short-stroke key 9 fastened with the aid of a in the housing 1 or the front panel 3rd held push button 11 is actuated from plastic.

Die Frontblende 3 weist eine kreisförmige Blendenöffnung 13 und in entsprechender Verlängerung weist der Haltungsabschnitt 5 des Gehäuses 1 eine sich in Richtung auf die Leiterplatte 7 zu konisch verjüngende Hülse 15 auf. Der einstückige Drucktaster 11 ragt mit einem Tasterkopf 17, auf dem eine Tasterkappe 19 befestigt ist, in die Blendenöffnung 13 bzw. aus dieser heraus nach vorne. Eine ringförmige Schulter 21 der Kappe 19 hintergreift die Frontblende 3 und sichert den Drucktaster 11 unverlierbar im Gehäuse 1, wenn die Frontblende 3 an dem Gehäuse 1 befestigt ist. Vom Tasterkopf 17 aus erstreckt sich eine Tasterstange 23 von der Frontblende 3 weg ins Innere des Gehäuses 1. Etwa im Mittelbereich der Tasterstange 23 weist diese eine Anschlagscheibe 25 auf, die mit einem entsprechenden Absatz 26 des Gehäuses 1 bzw. des Halterungsabschnittes 5 als Wegbegrenzung für den Drucktaster 11 dient. Im Anschluß an die Anschlagscheibe 25 sind in der Tasterstange 23 zwei Federschlitze 27 ausgebildet, die als Dämpfungselement bei axialer Belastung des Drucktasters 11 dienen. Durch die Federschlitze 27 bzw. das dadurch gebildete Dämpfungselement in der Tastenstange 23 wird verhindert, daß im Falle ungünstiger Gehäuse- und Drucktastertoleranzen beim Drücken des Drucktasters 11 auf die Kurzhubtaste 9 zuviel Kraft auf diese ausgeübt wird.The front panel 3 has a circular aperture 13 and in a corresponding Extension has the holding section 5 of the housing 1 in the direction of the Printed circuit board 7 to tapered sleeve 15. The one-piece push button 11 projects with a push button head 17, on which a push button cap 19 is fastened, into the aperture 13 or out of this to the front. An annular shoulder 21 of the cap 19 engages behind the front panel 3 and secures the push button 11 captively in the housing 1 when the Front panel 3 is attached to the housing 1. One extends from the probe head 17 Pushbutton rod 23 away from the front panel 3 into the interior of the housing 1. Approximately in the middle the pushbutton rod 23 has a stop disk 25 which is connected to a corresponding paragraph 26 of the housing 1 or the bracket portion 5 as a path limitation serves for the push button 11. Following the stop plate 25 are in the Pushbutton rod 23 two spring slots 27 formed as a damping element in the axial Load the push button 11 serve. Through the spring slots 27 or the thereby formed Damping element in the key rod 23 is prevented in the case of less favorable Housing and push button tolerances when pressing the push button 11 on the short-stroke key 9 too much force is exerted on them.

Im Bereich des dem Tasterkopf 17 gegenüberliegenden Endabschnittes des Drucktasters 11 ist an der Tasterstange 23 eine Tasterwulst 29 ausgeformt. Mit dieser ist der Drucktaster 11 in der Hülse 15 des Gehäuses 1 durch Einstecken unverlierbar halterbar, bevor der Drucktaster 11 mit der aufgesteckten Kappe 19 durch das Montieren der Frontblende 3 endgültig in dem Gehäuse 1 fixiert ist.In the area of the end section of the push button 11 opposite the push button head 17 a stylus bead 29 is formed on the stylus rod 23. This is the push button 11 captive in the sleeve 15 of the housing 1 by inserting it before the push button 11 with the attached cap 19 by mounting the front panel 3 finally is fixed in the housing 1.

Zur federnden Betätigung des Drucktasters 11 weist dieser ein Federelement 31 auf. Dieses ist durch zwei Federarme 33 gebildet, die sich beiderseits der Tasterstange 23 im wesentlichen parallel zu dieser vom Tasterkopf 17 aus bis auf Höhe der Anschlagscheibe 25 erstrecken und dort frei enden. Die Federarme 33 sind mäanderförmig ausgebildet und stützen sich mit ihrem freien Endabschnitt an dem Halterungsabschnitt 5 des Gehäuses ab. Dabei ist der Drucktaster 11 unter Vorspannung hinter der Frontblende 3 montiert, wodurch ein definierter Sitz des Drucktasters 11 und ein angenehmes Bediengefühl erreicht sind. Die Federarme 33 sind im Bereich des Tasterkopfes 17 angeformt und stabilisieren durch ihre dreidimensional mäanderförmige Erstreckung den Drucktaster 11 bei dessen Verschiebebewegung in dem Gehäuse 1.For the resilient actuation of the push button 11, this has a spring element 31. This is formed by two spring arms 33, which are on both sides of the push rod 23 essentially parallel to this from the probe head 17 up to the stop disk 25 extend and end there freely. The spring arms 33 are meandering and are supported with their free end section on the mounting section 5 of the housing. The pushbutton 11 is mounted under tension behind the front panel 3, whereby a defined fit of the push button 11 and a pleasant operating feeling are achieved. The Spring arms 33 are formed in the area of the probe head 17 and stabilize them three-dimensional meandering extension of the pushbutton 11 during its displacement movement in the housing 1.

Der Drucktaster 11 mit all seinen Funktionselementen ist einstückig ausgebildet und in Spritzgießtechnik hergestellt. Dabei sind insbesondere die Federelemente 33 oder die Federschlitze 27 derart gestaltet, daß eine Herstellung mit einfachsten Werkzeugen ohne Schieber möglich ist. Dazu ist der Drucktaster 11 bzgl. einer Entformungsrichtung (Pfeile in Fig. 2) senkrecht zur Längsachse der Tasterstange 23 hinterschnittfrei ausgebildet.The push button 11 with all its functional elements is formed in one piece and in Injection molding technology manufactured. In particular, the spring elements 33 or Spring slots 27 designed so that a production with the simplest tools without Slider is possible. For this purpose, the push button 11 is in relation to a direction of removal (arrows in Fig. 2) perpendicular to the longitudinal axis of the push rod 23 formed without undercuts.

Claims (7)

  1. Pushbutton with a button element, which can be arranged in a housing panel to be displaceable, for actuation of a button or a contact which is arranged behind the housing panel at a spacing therefrom to be fixed relative to the housing, wherein an actuating element can be pressed by the button element against the resistance of a spring element, which is supported at the housing, at the button or the contact, and the spring element (31) is formed integrally with the button element (17) and/or the actuating element (23), characterised in that the spring element (21) comprises at least one spring arm (33) which extends substantially in one plane and extends in meander-shape along the actuating element (23).
  2. Pushbutton according to claim 1, characterised in that the actuating element (23) comprises a detent element (29) for retaining the pushbutton (11) in the housing (1).
  3. Pushbutton according to one of the preceding claims, characterised in that the button element (17) or the actuating element (23) has an abutment (25) for limitation of the displacement travel of the pushbutton (11) in the housing (1).
  4. Pushbutton according to one of the preceding claims, characterised in that the pushbutton (11) is mounted in the housing (1) under bias.
  5. Pushbutton according to one of the preceding claims, characterised in that the spring arm (33) extends in meander-shape in all three planes along the actuating element (23).
  6. Pushbutton according to one of the preceding claims, characterised in that the pushbutton (11) is produced integrally by injection moulding, particularly from plastics material.
  7. Pushbutton according to claim 5 in conjunction with claim 6, characterised in that the mould removal direction for the production of the pushbutton (11) by injection moulding is oriented perpendicularly to the longitudinal axis of the actuating element (23) and that the pushbutton (11) is constructed to be free of undercuts with respect thereto.
EP98100414A 1997-01-23 1998-01-12 Pushbutton Expired - Lifetime EP0855728B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29701148U DE29701148U1 (en) 1997-01-23 1997-01-23 Push button
DE29701148U 1997-01-23

Publications (3)

Publication Number Publication Date
EP0855728A2 EP0855728A2 (en) 1998-07-29
EP0855728A3 EP0855728A3 (en) 1999-05-26
EP0855728B1 true EP0855728B1 (en) 2004-09-15

Family

ID=8034961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98100414A Expired - Lifetime EP0855728B1 (en) 1997-01-23 1998-01-12 Pushbutton

Country Status (2)

Country Link
EP (1) EP0855728B1 (en)
DE (2) DE29701148U1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29904519U1 (en) * 1999-03-12 2000-08-24 AEG Hausgeräte GmbH, 90429 Nürnberg Control device for arrangement in the control panel of large household appliances or the like.
EP2282317B1 (en) * 2009-07-29 2015-09-30 Electrolux Home Products Corporation N.V. Push button switch assembly
DK2824685T3 (en) 2013-07-11 2016-01-04 Rafi Gmbh & Co Kg Power device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4463237A (en) * 1983-04-13 1984-07-31 Wico Corporation Pushbutton assembly with integral bias means
DE8510147U1 (en) * 1985-04-04 1987-05-07 Siemens AG, 1000 Berlin und 8000 München Keycap for a keyboard arranged in a housing
DE8908429U1 (en) * 1989-07-11 1989-08-24 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth Keyset

Also Published As

Publication number Publication date
EP0855728A2 (en) 1998-07-29
DE29701148U1 (en) 1997-04-17
DE59811930D1 (en) 2004-10-21
EP0855728A3 (en) 1999-05-26

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