EP2175462B1 - Sealed switch - Google Patents

Sealed switch Download PDF

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Publication number
EP2175462B1
EP2175462B1 EP08017767.8A EP08017767A EP2175462B1 EP 2175462 B1 EP2175462 B1 EP 2175462B1 EP 08017767 A EP08017767 A EP 08017767A EP 2175462 B1 EP2175462 B1 EP 2175462B1
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EP
European Patent Office
Prior art keywords
protective cap
actuating head
ring
actuating
switch
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.)
Not-in-force
Application number
EP08017767.8A
Other languages
German (de)
French (fr)
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EP2175462A1 (en
Inventor
Peter GLÜCK
Albert Wasmeier
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.)
Rafi GmbH and Co KG
Original Assignee
Rafi GmbH and Co KG
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Publication date
Application filed by Rafi GmbH and Co KG filed Critical Rafi GmbH and Co KG
Priority to EP08017767.8A priority Critical patent/EP2175462B1/en
Publication of EP2175462A1 publication Critical patent/EP2175462A1/en
Application granted granted Critical
Publication of EP2175462B1 publication Critical patent/EP2175462B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • 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
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings

Definitions

  • the invention relates to a switch for converting a linear movement of a key into an electrical switching signal according to the preamble of claim 1.
  • switches have been successfully manufactured by the patent applicant for years under the name "Rafix” and placed on the market. These switches have been characterized in that the actuating head has a planar or planar trained actuating surface and that between the top of the actuating head and this protective cover covering an air gap is present. During actuation, therefore, the protective cap must first be pressed onto the surface of the actuating head, in order subsequently to cover the entire stroke together with the actuating head.
  • the cap Since production reasons, the cap has an annular protruding outward bulge in the outer edge region of the switch, it is therefore often on the operating level to dirt deposits that settle on the circumferential collar namely.
  • the haptic is impaired in the operation, because the additional stroke, which must cover the cap due to the existing air gap causes with increasing distance from the initial position of the cap a restoring force due to the self-adjusting bias due to the expansion of the protective cap arises, so that the force for generating the switching signal, ie immediately before reaching the switching point to size larger is the force pushing the protective cap and actuator out of their initial position. Due to the existing air gap between the surface of the actuating head and the underside of the protective cap therefore the switching characteristic or switching characteristic of the switch is affected, because in different positions different sized forces are applied for actuation.
  • a disadvantage in the attachment of the sealing film on the outside of the actuating head has been found that the sealing film covers the strokes of the actuating head and the probe. Thus, in the switching state, the sealing film is pressed into the interior of the housing and thus limits the stroke of the actuating head or the button.
  • the sealing foil changes the switching feel of the actuating head or of the pushbutton, since a return force is exerted on the pushbutton by the latter.
  • a joint-free curved surface of the protective cap is created so that soiling does not fit and can also be wiped off in a simple manner. Furthermore, there are no projections, beads or the like due to the present bias of the protective cap, which could serve as an attachment for soiling particles.
  • the protective cap Due to the shape of the actuating head according to the invention it is achieved that the protective cap has no unevenness or other deformations during the return deformation, ie after the discharge. Since such switches are subject to a variety of strokes during their life, the deformation of the cap is both of considerable aesthetic, as well as of considerable functional importance, because on the one hand, the life of the switch and the cap is increased and, secondly, the switch over a long time hermetically sealed to the outside, so that no impurities enter the interior of the switch.
  • FIG. 1 is a switch 1 for converting a linear movement of a key 3 in an electrical switching signal refer.
  • the switch 1 consists of a housing 2, which is designed as a tube, cylinder with different inner diameters, ie as a hollow body.
  • the key 3 is held axially guided, so that it acts by an externally acting actuating force from a as in FIG. 1 shown starting position in a as in FIG. 2 shown switching position can be transferred.
  • Such switches 1 are used, for example, in machine tools or the like.
  • the lifting movement and the generation of the switching contact by the axial feed movement of the key 3 is in the FIGS. 1 and 2 shown only schematically, because the object of the present invention is to encapsulate the interior of the housing 2 against the environment waterproof and at the same time to achieve optimum switching characteristics in the feed movement of the key 3.
  • an actuating head 4 is attached thereto.
  • the actuating head 4 is pushed over the thus fixed O-ring 12, so that the round actuating head 4 is widened in the region of the 0-ring 12 and consequently rests against this under pretension and is locked.
  • the actuating head 4 is outwardly dome or hemispherical curved, whereby a the outer surface of the actuating head 4 encompassing protective cap 5 is under pretension and therefore watertight rests on the outside of the actuating head 4 over its entire surface.
  • the protective cap 5 consists of a pliable plastic material, which is nevertheless adapted by the predetermined outer surface of the actuating head 4 in its shape to this.
  • the protective cap 5 is manufactured together with a ring 6 as a two-component plastic component in an injection molding process. Consequently, no parting line is created between the protective cap 5 and the ring 6; Rather, it is a plastic component, which consists of a flexurally soft area, namely the protective cap 5, and a fixed area, namely the ring 6. On the outside of the ring 6, a thread 7 is worked, which is fixed in a corresponding internal thread, which is provided on the inside of the housing 2.
  • a diaphragm 10 is provided, which is firmly clamped to the housing 2 and the key 3.
  • FIG. 2 Of the FIG. 2 is the actuated switching state of the key 3 based.
  • the protective cap 5 In this end or switching position, the protective cap 5 is transferred from its initial position into the electrical signal generating switching position.
  • the center position indicated by the reference numeral 13 indicates the position by which the protective cap 5 is transferred upon actuation.
  • the shape of the actuation head 4 and consequently the outwardly projecting maximum extent of the protective cap 5 from the central position 13 is represented by the variables a 1 and a 2 .
  • the stroke of the cap 5 is therefore composed of the way in the amount of a 1 and a 2 together with a 1 approximately a 2. This means that the switching characteristic of the button 3 is not hindered by the flexibility of the cap 5.
  • the bias voltage with which the protective cap 5 is held by the actuating head 4 does not counteract the actuating force and is of the same size when the protective cap 5 has reached its end position.
  • FIG. 2 can also be seen that in the transition region 11, ie between the clamping of the protective cap 5 on the ring 6 and the first contact point of the protective cap 5 on the actuating head 4, a deformation takes place.
  • a linear course is achieved, which in the end position according to FIG. 2 only slightly matched to an extremely flat trained parabola. Because of this formation of deformation over the stroke is achieved that the switching characteristic of the entire arrangement is not affected by the flexible design of the cap 5.
  • the protective cap 5 in the starting position according to FIG. 1 is applied over the entire surface on the outside of the actuating head 4, it is achieved that the protective cap 5 is pressed to the outside, so that no projections, crests or other undesirable elevations arise on this, on which dirt particles can be deposited. Furthermore, the surface of the protective cap 5 and the ring 6 is designed without joints, so that even in the transition region between these dirt deposits can not occur.

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  • Push-Button Switches (AREA)

Description

Die Erfindung bezieht sich auf einen Schalter zur Umwandlung einer linearen Bewegung einer Taste in ein elektrisches Schaltsignal nach dem Oberbegriff des Patentanspruches 1.The invention relates to a switch for converting a linear movement of a key into an electrical switching signal according to the preamble of claim 1.

Derartige Schalter werden von der Patentanmelderin seit Jahren erfolgreich unter der Bezeichnung "Rafix" hergestellt und in den Verkehr gebracht. Diese Schalter haben sich dadurch ausgezeichnet, dass der Betätigungskopf eine eben bzw. plan ausgebildete Betätigungsfläche aufweist und dass zwischen der Oberseite des Betätigungskopfes und der diese abdeckenden Schutzkappe ein Luftspalt vorhanden ist. Bei der Betätigung muss daher zunächst die Schutzkappe auf die Oberfläche des Betätigungskopfes gedrückt werden, um anschließend den gesamten Hubweg gemeinsam mit dem Betätigungskopf zurückzulegen.Such switches have been successfully manufactured by the patent applicant for years under the name "Rafix" and placed on the market. These switches have been characterized in that the actuating head has a planar or planar trained actuating surface and that between the top of the actuating head and this protective cover covering an air gap is present. During actuation, therefore, the protective cap must first be pressed onto the surface of the actuating head, in order subsequently to cover the entire stroke together with the actuating head.

Da herstellungsbedingt die Schutzkappe eine ringförmige nach außen abstehende Ausbuchtung im äußeren Randbereich des Schalters aufweist, kommt es daher auf der Betätigungsebene oftmals zu Schmutzablagerungen, die sich nämlich an dem umlaufenden Bund festsetzen.Since production reasons, the cap has an annular protruding outward bulge in the outer edge region of the switch, it is therefore often on the operating level to dirt deposits that settle on the circumferential collar namely.

Darüber hinaus ist die Haptik bei der Betätigung beeinträchtigt, denn der zusätzliche Hubweg, den die Schutzkappe aufgrund des vorhandenen Luftspaltes zurücklegen muss, führt dazu, dass sich mit zunehmendem Abstand von der Ausgangslage der Schutzkappe eine Rückstellkraft aufgrund der sich einstellenden Vorspannung wegen der Ausdehnung der Schutzkappe entsteht, so dass die Kraft zur Erzeugung des Schaltsignals, also unmittelbar vor Erreichen des Schaltpunktes, größer zu bemessen ist als die Kraft, die die Schutzkappe und dem Betätigungskopf aus ihrer Ausgangslage herausdrücken. Durch den vorhandenen Luftspalt zwischen der Oberfläche des Betätigungskopfes und der Unterseite der Schutzkappe wird daher die Schalteigenschaft bzw. Schaltcharakteristik des Schalters beeinträchtigt, denn in verschiedenen Positionen sind unterschiedlich groß bemessene Kräfte zur Betätigung aufzubringen.In addition, the haptic is impaired in the operation, because the additional stroke, which must cover the cap due to the existing air gap causes with increasing distance from the initial position of the cap a restoring force due to the self-adjusting bias due to the expansion of the protective cap arises, so that the force for generating the switching signal, ie immediately before reaching the switching point to size larger is the force pushing the protective cap and actuator out of their initial position. Due to the existing air gap between the surface of the actuating head and the underside of the protective cap therefore the switching characteristic or switching characteristic of the switch is affected, because in different positions different sized forces are applied for actuation.

Aus der DE G8630188.8 01 ist ein solcher Schalter zu entnehmen, dessen Betätigungskopf domförmig nach außen ausgestaltet ist. Auf der Außenseite des Betätigungskopfes ist eine Dichtfolie aufgeklebt, durch die der Übergangsbereich zwischen dem Betätigungskopf und dem Gehäuse des Schalters luftdicht verschlossen ist.From the DE G8630188.8 01 can be seen such a switch whose actuator head is designed dome-shaped to the outside. On the outside of the actuating head, a sealing film is glued, through which the transition region between the actuating head and the housing of the switch is hermetically sealed.

Als nachteilig bei der Anbringung der Dichtungsfolie auf der Außenseite des Betätigungskopfes hat sich herausgestellt, dass die Dichtungsfolie die Hubbewegungen des Betätigungskopfes bzw. des Tasters zurücklegt. Somit ist im Schaltzustand die Dichtungsfolie in das Innere des Gehäuses gedrückt und begrenzt folglich den Hubweg des Betätigungskopfes bzw. des Tasters.A disadvantage in the attachment of the sealing film on the outside of the actuating head has been found that the sealing film covers the strokes of the actuating head and the probe. Thus, in the switching state, the sealing film is pressed into the interior of the housing and thus limits the stroke of the actuating head or the button.

Darüber hinaus verändert die Dichtungsfolie die Schalthaptik des Betätigungskopfes bzw. des Tasters, da durch diese eine Rückstallkraft auf den Taster ausgeübt ist.In addition, the sealing foil changes the switching feel of the actuating head or of the pushbutton, since a return force is exerted on the pushbutton by the latter.

Es ist daher Aufgabe der Erfindung einen Schalter der eingangs genannten Gattung derart weiterzubilden, dass zum einen bei der Betätigung der Schutzkappe und des Betätigungskopfes eine einheitliche Schaltcharakteristik vorliegt, ohne dass unterschiedliche Kräfte über den Hubweg der Schutzkappe und des Betätigungskopfes aufzubringen sind und dass zum anderen eine Oberfläche der Schutzkappe gebildet ist, auf der Schmutzablagerungen aufgrund von Unebenheiten vermieden sind.It is therefore an object of the invention to develop a switch of the type mentioned in such a way that on the one hand in the operation of the cap and the actuating head a uniform switching characteristic is present without different forces on the stroke of the cap and the actuating head are applied and that on the other hand Surface of the protective cap is formed, are avoided on the dirt deposits due to bumps.

Diese Aufgaben sind erfindungsgemäß durch die Merkmale des kennzeichnenden Teiles von Patentanspruch 1 gelöst.These objects are achieved by the features of the characterizing part of claim 1.

Weitere vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous developments of the invention will become apparent from the dependent claims.

Dadurch, dass die Schutzkappe unter Vorspannung steht, da der Betätigungskopf dom- oder halbkugelförmig nach außen entgegen der Bewegungsrichtung des Schalters gewölbt ist, wird eine einheitliche Schaltcharakteristik erzeugt, denn unmittelbar bei dem Betätigen der Schutzkappe wird bereits der Betätigungskopf aus seiner Ausgangslage gedrückt. Während die Schutzkappe und der Betätigungskopf in Richtung des Schaltkontaktes bewegt werden, sind keine unterschiedlich groß bemessenen Betätigungskräfte aufzubringen, da die Schutzkappe zwischen einem oberen und einem unteren Ausdehnungspunkt bewegt wird, so dass keine zusätzlichen aufgrund einer Überdehnung der Schutzkappe entstehenden Rückstellkräfte auftreten.Characterized in that the protective cap is under bias, since the actuator head is domed or hemispherical outwardly against the direction of movement of the switch, a uniform switching characteristic is generated, because immediately upon actuation of the protective cap is already pressed from its initial position. While the protective cap and the actuating head are moved in the direction of the switching contact, no differently sized actuating forces are applied, since the protective cap is moved between an upper and a lower extension point, so that no additional due to overstretching of the protective cap resulting restoring forces occur.

Des Weiteren entsteht eine fugenfreie gekrümmte Oberfläche der Schutzkappe, so dass Verschmutzungen keine Anlage finden und zudem auf einfache Art und Weise abgewischt werden können. Des Weiteren sind keine Anformungen, Wülste oder dergleichen aufgrund der vorliegenden Vorspannung der Schutzkappe vorhanden, die als Anlage für Verschmutzungspartikel dienen könnten.Furthermore, a joint-free curved surface of the protective cap is created so that soiling does not fit and can also be wiped off in a simple manner. Furthermore, there are no projections, beads or the like due to the present bias of the protective cap, which could serve as an attachment for soiling particles.

Aufgrund der erfindungsgemäßen Form des Betätigungskopfes wird erreicht, dass die Schutzkappe bei der Rückverformung, also nach der Entlastung, keinerlei Unebenheiten oder sonstige Verformungen aufweist. Da derartige Schalter während ihrer Lebensdauer einer Vielzahl von Hubbewegungen unterliegen, ist die Verformungseigenschaft der Schutzkappe sowohl von erheblicher ästhetischer, als auch von erheblicher funktionaler Bedeutung, denn zum einen wird hierdurch die Lebensdauer des Schalters und der Schutzkappe erhöht und zum anderen ist der Schalter über einen langen Zeitraum luftdicht nach außen verschlossen, so dass in das Innere des Schalters keine Verunreinigungen eintreten.Due to the shape of the actuating head according to the invention it is achieved that the protective cap has no unevenness or other deformations during the return deformation, ie after the discharge. Since such switches are subject to a variety of strokes during their life, the deformation of the cap is both of considerable aesthetic, as well as of considerable functional importance, because on the one hand, the life of the switch and the cap is increased and, secondly, the switch over a long time hermetically sealed to the outside, so that no impurities enter the interior of the switch.

In der Zeichnung ist ein erfindungsgemäßes Ausführungsbeispiel dargestellt, das nachfolgend näher erläutert wird. Im Einzelnen zeigt:

Figur 1
einen Schalter mit einem Gehäuse, in dessen Inneren eine Taste axial beweglich gehalten ist, die von einem Betätigungskopf und einer Schutzkappe nach außen verschlossen ist, im Schnitt und im unbetätigten Zustand und
Figur 2
den Schalter gemäß Figur 1 im betätigten Zustand.
In the drawing, an inventive embodiment is shown, which will be explained in more detail below. In detail shows:
FIG. 1
a switch having a housing in the interior of which a key is axially movably held by an actuating head and a Protective cap is closed to the outside, in section and in the unactuated state and
FIG. 2
the switch according to FIG. 1 in the actuated state.

In Figur 1 ist ein Schalter 1 zur Umwandlung einer linearen Bewegung einer Taste 3 in ein elektrisches Schaltsignal zu entnehmen. Der Schalter 1 besteht dabei aus einem Gehäuse 2, das als Rohr, Zylinder mit unterschiedlichen Innendurchmessern, also als Hohlkörper, ausgestaltet ist. Im Inneren des Gehäuses 2 ist die Taste 3 axial geführt gehalten, so dass diese durch eine von außen einwirkende Betätigungskraft aus einer wie in Figur 1 gezeigten Ausgangslage in eine wie in Figur 2 dargestellten Schaltlage überführt werden kann. Derartige Schalter 1 werden beispielsweise in Werkzeugmaschinen oder dgl. eingesetzt.In FIG. 1 is a switch 1 for converting a linear movement of a key 3 in an electrical switching signal refer. The switch 1 consists of a housing 2, which is designed as a tube, cylinder with different inner diameters, ie as a hollow body. In the interior of the housing 2, the key 3 is held axially guided, so that it acts by an externally acting actuating force from a as in FIG. 1 shown starting position in a as in FIG. 2 shown switching position can be transferred. Such switches 1 are used, for example, in machine tools or the like.

Die Hubbewegung und die Erzeugung des Schaltkontaktes durch die axiale Zustellbewegung der Taste 3 ist in den Figuren 1 und 2 lediglich schematisch dargestellt, denn Aufgabe der vorliegenden Erfindung ist es, das Innere des Gehäuses 2 gegenüber der Umgebung wasserdicht zu kapseln und gleichzeitig eine optimale Schaltcharakteristik bei der Zustellbewegung der Taste 3 zu erreichen.The lifting movement and the generation of the switching contact by the axial feed movement of the key 3 is in the FIGS. 1 and 2 shown only schematically, because the object of the present invention is to encapsulate the interior of the housing 2 against the environment waterproof and at the same time to achieve optimum switching characteristics in the feed movement of the key 3.

Auf der nach außen abstehenden Stirnseite der Taste 3 ist ein Betätigungskopf 4 an dieser angebracht. Die Arretierung des Betätigungskopfes 4 an der Taste 3 erfolgt über einen umlaufenden O-Ring 12, der in eine in den Außenumfang der Taste 3 eingearbeitete Nut eingerastet ist. Der Betätigungskopf 4 wird über den derart fixierten O-Ring 12 geschoben, so dass der runde Betätigungskopf 4 im Bereich des 0-Ringes 12 aufgeweitet und folglich an diesem unter Vorspannung anliegt und arretiert ist.On the outwardly projecting front side of the key 3, an actuating head 4 is attached thereto. The locking of the actuating head 4 on the key 3 via a circumferential O-ring 12 which is engaged in an incorporated in the outer periphery of the key 3 groove. The actuating head 4 is pushed over the thus fixed O-ring 12, so that the round actuating head 4 is widened in the region of the 0-ring 12 and consequently rests against this under pretension and is locked.

Der Betätigungskopf 4 ist nach außen dom- bzw. halbkugelförmig gewölbt, wodurch eine die Außenfläche des Betätigungskopfes 4 umgreifende Schutzkappe 5 unter Vorspannung steht und demnach wasserdicht auf der Außenseite des Betätigungskopfes 4 vollflächig anliegt. Die Schutzkappe 5 besteht aus einem biegeweichen Kunststoffmaterial, das dennoch durch die vorgegebene Außenfläche des Betätigungskopfes 4 in seiner Formgebung an diese angepasst ist.The actuating head 4 is outwardly dome or hemispherical curved, whereby a the outer surface of the actuating head 4 encompassing protective cap 5 is under pretension and therefore watertight rests on the outside of the actuating head 4 over its entire surface. The protective cap 5 consists of a pliable plastic material, which is nevertheless adapted by the predetermined outer surface of the actuating head 4 in its shape to this.

Die Schutzkappe 5 ist zusammen mit einem Ring 6 als Zweikomponenten-Kunststoffbauteil in einem Spritzgussverfahren gefertigt. Zwischen der Schutzkappe 5 und dem Ring 6 entsteht folglich keine Trennfuge; vielmehr handelt es sich um ein Kunststoffbauteil, das aus einem biegeweichen Bereich, nämlich der Schutzkappe 5, und aus einem festen Bereich, nämlich dem Ring 6, besteht. An der Außenseite des Ringes 6 ist ein Gewinde 7 angearbeitet, das in ein damit korrespondierendes Innengewinde, das auf der Innenseite des Gehäuses 2 vorgesehen ist, befestigt ist.The protective cap 5 is manufactured together with a ring 6 as a two-component plastic component in an injection molding process. Consequently, no parting line is created between the protective cap 5 and the ring 6; Rather, it is a plastic component, which consists of a flexurally soft area, namely the protective cap 5, and a fixed area, namely the ring 6. On the outside of the ring 6, a thread 7 is worked, which is fixed in a corresponding internal thread, which is provided on the inside of the housing 2.

Um das Innere des Gehäuses 2, insbesondere zwischen dem Übergangsbereich der Taste 3 und dem Schaltkontakt, zusätzlich abzudichten und auch um die Taste 3 im Inneren zusätzlich abzustützen, ist eine Membrane 10 vorgesehen, die an dem Gehäuse 2 und der Taste 3 fest eingespannt ist.In order to additionally seal the interior of the housing 2, in particular between the transition region of the key 3 and the switching contact and also to support the key 3 in the interior, a diaphragm 10 is provided, which is firmly clamped to the housing 2 and the key 3.

Der Figur 2 liegt der betätigte Schaltzustand der Taste 3 zugrunde. In dieser Endoder Schaltposition wird die Schutzkappe 5 aus ihrer Ausgangsposition in die das elektrische Signal erzeugende Schaltlage überführt. Die mit der Bezugsziffer 13 gekennzeichnete Mittellage gibt dabei die Position an, durch die die Schutzkappe 5 bei Betätigen überführt wird. Die Form des Beätigungskopfes 4 und folglich die nach außen abstehende maximale Ausdehnung der Schutzkappe 5 aus der Mittellage 13 ist mit den Variablen a1 und a2 dargestellt. Der Hubweg der Schutzkappe 5 setzt sich demnach aus dem Weg in Höhe von a1 und a2 zusammen, wobei a1 angenähert a2. Dies bedeutet, dass die Schaltcharakteristik der Taste 3 durch die Flexibilität der Schutzkappe 5 nicht behindert wird. Die Vorspannung, mit der die Schutzkappe 5 durch den Betätigungskopf 4 gehalten ist, wirkt der Betätigungskraft nicht entgegen und ist gleich groß bemessen, wenn die Schutzkappe 5 ihre Endposition erreicht hat.Of the FIG. 2 is the actuated switching state of the key 3 based. In this end or switching position, the protective cap 5 is transferred from its initial position into the electrical signal generating switching position. The center position indicated by the reference numeral 13 indicates the position by which the protective cap 5 is transferred upon actuation. The shape of the actuation head 4 and consequently the outwardly projecting maximum extent of the protective cap 5 from the central position 13 is represented by the variables a 1 and a 2 . The stroke of the cap 5 is therefore composed of the way in the amount of a 1 and a 2 together with a 1 approximately a 2. This means that the switching characteristic of the button 3 is not hindered by the flexibility of the cap 5. The bias voltage with which the protective cap 5 is held by the actuating head 4 does not counteract the actuating force and is of the same size when the protective cap 5 has reached its end position.

Aus Figur 2 kann auch entnommen werden, dass im Übergangsbereich 11, also zwischen der Einspannung der Schutzkappe 5 an dem Ring 6 und dem ersten Auflagepunkt der Schutzkappe 5 an dem Betätigungskopf 4, eine Verformung stattfindet. In der Ausgangsposition der Schutzkappe 5 gemäß Figur 1 ist ein linearer Verlauf erreicht, der in der Endposition gemäß Figur 2 lediglich geringfügig an einer äußerst flach ausgebildeten Parabel angeglichen ist. Aufgrund dieser Ausbildung der Verformung über den Hubweg wird erreicht, dass die Schaltcharakteristik der gesamten Anordnung durch die flexible Ausgestaltung der Schutzkappe 5 nicht beeinflusst wird.Out FIG. 2 can also be seen that in the transition region 11, ie between the clamping of the protective cap 5 on the ring 6 and the first contact point of the protective cap 5 on the actuating head 4, a deformation takes place. In the starting position of the protective cap 5 according to FIG. 1 a linear course is achieved, which in the end position according to FIG. 2 only slightly matched to an extremely flat trained parabola. Because of this formation of deformation over the stroke is achieved that the switching characteristic of the entire arrangement is not affected by the flexible design of the cap 5.

Dadurch, dass die Schutzkappe 5 in der Ausgangsposition gemäß Figur 1 vollflächig auf der Außenseite des Betätigungskopfes 4 anliegt, wird erreicht, dass die Schutzkappe 5 nach außen gedrückt wird, so dass auf dieser keine Anformungen, Kuppen oder sonstige unerwünschte Erhebungen entstehen, an denen sich Schmutzpartikel ablagern können. Des Weiteren ist die Oberfläche der Schutzkappe 5 und des Ringes 6 fugenlos ausgestaltet, so dass auch im Übergangsbereich zwischen diesen Schmutzablagerungen nicht eintreten können.Characterized in that the protective cap 5 in the starting position according to FIG. 1 is applied over the entire surface on the outside of the actuating head 4, it is achieved that the protective cap 5 is pressed to the outside, so that no projections, crests or other undesirable elevations arise on this, on which dirt particles can be deposited. Furthermore, the surface of the protective cap 5 and the ring 6 is designed without joints, so that even in the transition region between these dirt deposits can not occur.

Claims (4)

  1. A switch (1) for converting a linear movement of a momentary-contact button (3) into an electrical switching signal, with a housing (2) by means of which the momentary-contact button (3) held within the housing (2) is supported in an axially movable manner, with an actuating head (4) firmly connected to the momentary-contact button (3) and with a protective cap (5) made of a flexible plastic material covering the actuating head (4) and sealing it outwardly, in which the actuating head (4) has a dome or hemispherical-shaped outward curvature projecting opposite to the actuating direction (8) of the key (3) and in which a preload force acting on the protective cap (5) is generated by the actuating head (4), as a result of which the protective cap (5) is held in air-tight contact under preload against the surface of the actuating head (4) when not actuated.
    characterised in that,
    the protective cap (5) is formed onto a ring (6), that the protective cap (5) and the ring (6) are produced from a two-component plastic, that the protective cap (5) and the ring (6) are manufactured using the injection moulding process, that the protective cap (5) is configured in the transitional area (11) between the actuating head (4) and the ring (6) in such a way that the stroke distance to be covered by the protective cap (5) is compensated for during the axial actuating of the actuating head (4).
  2. The switch device in accordance with Claim 1,
    characterised in that,
    the outer wall of the ring (6) has a thread (7) worked into it, which can be screwed onto a thread provided on the inside surface of the housing (2).
  3. The switch in accordance with Claim 1 or 2, characterised in that,
    the ring (6) is produced from a firm plastic material.
  4. The switch in accordance with Claim 1, characterised in that,
    the protective cap (5) has an approximately linear profile in the transitional area (11) between the support on the actuating head (4) and the ring (6).
EP08017767.8A 2008-10-10 2008-10-10 Sealed switch Not-in-force EP2175462B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08017767.8A EP2175462B1 (en) 2008-10-10 2008-10-10 Sealed switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08017767.8A EP2175462B1 (en) 2008-10-10 2008-10-10 Sealed switch

Publications (2)

Publication Number Publication Date
EP2175462A1 EP2175462A1 (en) 2010-04-14
EP2175462B1 true EP2175462B1 (en) 2013-12-11

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ID=40404989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08017767.8A Not-in-force EP2175462B1 (en) 2008-10-10 2008-10-10 Sealed switch

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EP (1) EP2175462B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108985380A (en) * 2018-07-25 2018-12-11 西南交通大学 A kind of goat fault recognition method based on clustering ensemble

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011118178B3 (en) * 2011-11-10 2013-05-16 Eao Ag Illuminated, water and dustproof switching element
CN110598750B (en) * 2019-08-14 2021-09-28 卡斯柯信号有限公司 Working condition identification method based on switch machine action curve similarity characteristics

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8630188U1 (en) 1986-11-11 1987-07-30 Schurter GmbH, 79346 Endingen Modular push button
FR2904889B1 (en) * 2006-08-09 2009-08-21 Peugeot Citroen Automobiles Sa DEVICE FOR ELECTRICALLY CONTROLLING THE OPENING OF AN OPENING OF A VEHICLE AND CONTROL BUTTON THAT CAN BE USED IN THIS DEVICE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108985380A (en) * 2018-07-25 2018-12-11 西南交通大学 A kind of goat fault recognition method based on clustering ensemble
CN108985380B (en) * 2018-07-25 2021-08-03 西南交通大学 Point switch fault identification method based on cluster integration

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