EP3046126B1 - Switching device - Google Patents

Switching device Download PDF

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Publication number
EP3046126B1
EP3046126B1 EP15151138.3A EP15151138A EP3046126B1 EP 3046126 B1 EP3046126 B1 EP 3046126B1 EP 15151138 A EP15151138 A EP 15151138A EP 3046126 B1 EP3046126 B1 EP 3046126B1
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EP
European Patent Office
Prior art keywords
switching
switching device
housing
accordance
switching 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.)
Active
Application number
EP15151138.3A
Other languages
German (de)
French (fr)
Other versions
EP3046126A1 (en
Inventor
Peter GLÜCK
Albert Wasmeier
Karl Riedter
Manuel Da Silva
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
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 Rafi GmbH and Co KG filed Critical Rafi GmbH and Co KG
Priority to EP15151138.3A priority Critical patent/EP3046126B1/en
Priority to US14/994,624 priority patent/US10734173B2/en
Priority to CN201610022579.0A priority patent/CN105788920B/en
Publication of EP3046126A1 publication Critical patent/EP3046126A1/en
Application granted granted Critical
Publication of EP3046126B1 publication Critical patent/EP3046126B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/86—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the casing, e.g. sealed casings or casings reducible in size
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00—Tactile feedback
    • H01H2215/004—Collapsible dome or bubble

Definitions

  • the invention relates to a switching device according to the preamble of claim 1.
  • Such a switching device is for example the EP 2 645 391 A1 refer to.
  • a flexurally elastic and electrically conductive snap-action disc is provided, which is attached to a thin-walled body.
  • the snap-action disc and the body are fixedly mounted on the surface of a printed circuit board on which at least one electrical switching contact which projects in the direction of the snap-action disc from the printed circuit board is provided.
  • Such switching devices have proven themselves in practice, but have the disadvantage that they can be used exclusively in electrical equipment, which have a correspondingly large space on the circuit board, namely, in which the switching device is installed.
  • the switching device and the circuit board require a given space.
  • the housing and the switching element include a space that in the bottom of the housing at least one switching contact is provided and that the respective switching contact protrudes in the direction of the switching element and from the outer contour of the housing, it is ensured that the switching contact on the one hand to the outside is closed air and / or watertight and on the other hand, that the spatial dimensions of the housing can be configured so small that this can also be used in components in which only a small spatial extent for such switching devices is present.
  • these switching devices serve to verify the keys inserted in the lock so that they are authorized, to open the door lock. A plurality of such switching devices are thus positioned in the locking system such that only the key simultaneously actuates all of the switching devices having the correct access authorization for the lock.
  • the printed circuit board is positioned outside of the switching device, this takes up no space, but rather can be installed spatially removed from the respective switching device.
  • the molded into the housing of the switching device or glued or otherwise fastened there switch contacts are fixed to the housing and protrude both in the direction of the switching element and to the outside, so that they can be used as a conductor to evaluate the operation of the switching element electrically.
  • the switching element is connected by means of crimping or ultrasonic welding to the housing, because on the one hand, the switching element is firmly fixed to the housing and on the other hand, the transition areas between the switching element and the housing air or water-tight, so that the interior enclosed by the snap-action disc and the housing is completely sealed.
  • FIGS. 1a and 1b there is illustrated a switching device 1 by which a mechanically induced movement is converted into an electrical switching signal to control, for example, a machine tool or other electrical device.
  • the switching device 1 can be installed as a miniature component in a locking system or a lock of a door and operated by the teeth of a key.
  • the available space for the switching device 1 is dimensioned extremely small, so that the switching device 1 as a miniature version has a spatial extent of 3 to 3 millimeters or a diameter of about 3 millimeters.
  • the switching device 1 is made of a dimensionally stable and temperature-resistant plastic material produced housing 2 and a permanently connected thereto switching element 3.
  • the switching element 3 is either completely made of an electrically conductive material, such as a metal, or at least partially coated with an electrically conductive material ,
  • the switching element 3 is also referred to in the specialist literature as a snap-action disk, because the switching element 3 is pressed into the direction of movement 4 from the starting position, which is concavely curved outwards, into a convex curvature transferred and moved in the direction of a switching contact 11.
  • the switching contact 11 is an integral part of the housing. 2
  • the switching contact 11 may be configured as a ball or as a cylindrical, completely closed or tubular body.
  • the switching contact 11 may also be a web, a groove or similar formed, which form a positive connection with the housing 2. It is essential to the invention that the switching contact 11 is made of an electrically conductive material.
  • the switching contact 11 which in the embodiments of the FIGS. 1a and 1b is formed of two balls, is firmly embedded in the housing 2.
  • the contact contact 11 or the balls are embedded in such a way by the liquid plastic compound, so that the respective formed as a ball switching contact 11 is coated in the region of the housing 2.
  • the housing 2 has a flat bottom 6, from which the respective switching contact 11 projects.
  • the housing 2 and the switching element 3 form a completely air and / or watertight closed space 5, in which the respective switching contact 11 protrudes.
  • This comes into contact with the two switching contacts 11, so that an electrical short circuit is formed, whereby the electrical switching signal is formed.
  • an adhesive layer 21 is provided and the housing 2 has a vertically projecting from the bottom 12 wall 7, which occupies an L-shaped inner cross-sectional contour and a contact surface for having the switching element 3. Between the inside of the wall 7, the snap-action disc or the switching element 3 is positioned on the contact surface.
  • the adhesive layer 21 the switching element 3 is firmly and water or airtight connected to the housing 2, so that the snap disc or the switching element 3 in the region of the contact surface is not movable relative to the housing 2, but only the center of the switching element 3 in the direction of the switching contacts 11 is movable.
  • the snap disc or the switching element 3 has a dome or a dome-shaped cross-sectional contour in its center increases the stability of the switching element 3, because the dome stiffens the thin-walled switching element 3 and can also be moved simultaneously in the direction of the respective switching contact 11 ,
  • the adhesive layer 21 is replaced by an ultrasonic beading 22, through which a projection of the wall 7 is provided, which cooperates with the switching element 3 in a force-locking or form-fitting manner.
  • a firm connection is formed and, moreover, the gap between the housing 2 or its wall 7 and the switching element 2 is sealed in such a way that neither water nor gas particles can penetrate into the space 5.
  • Both variants of the FIGS. 1a . 1b or 2a and 2b have in common that the respective switching element 3 is freely accessible from the outside. Both the adhesive layer 21 and the ultrasonic beading 22 extend annularly in the outer region of the respective switching element 3.
  • FIG. 3 It is shown that the respective snap-action disc or the switching element 3 is completely covered by means of an actuating element 15.
  • the actuating element 15 is in the starting position of the switching element 3 on this and is shaped to the outside.
  • both the actuating element 15 and the switching element 3 in the direction of the respective switching contacts 11 is moved.
  • An electrical pulse is generated for example by the actuation of the switching element 3 in the direction of movement 4 and an electrical connection between two adjacent switching contacts 11.
  • the pulse is received by the switch contacts 11 and by means of a printed circuit board 13, on which a plurality of conductor tracks 14, for example, are arranged in a grid, and is forwarded in the usual technical way to an evaluation and control device, such as a microprocessor.
  • FIG. 4 It is shown that four feet 16 are formed on the bottom 6 of the circuit board 13 facing side of the switching device 1.
  • the respective switching device 1 can be firmly connected to the printed circuit board 13 via these feet 16.
  • the respective foot 16 By means of a weld, a solder joint, an adhesive bond, a clip connection or a Schaub connection the respective foot 16 may be connected to the circuit board 13, so that a firm locking between the housing 2 of the switching device 1 and the circuit board 13 is made.
  • the respective snap disc or the switching element 3 is completely covered by a cap 23.
  • the cap 23 completely or partially surrounds the wall 7 and a fixing ring 25 is formed on the wall 7 side facing the cap 23 so that the fixing ring 25 engages in a shoulder 24 in the wall 7 in the manner of an undercut.
  • the cap 23 is thus air-tightly and clipped by the fixing ring 25 on the switching device 1.
  • the cap 23 is in the starting position of the switching element 3 on this.
  • the cap 23 is formed of a deformable and elastic material, so that when the cap 23 is actuated in the direction of movement 4, both the cap 23 and the switching element 3 are moved in the direction of the respective switching contacts 11.
  • the contour of the fixing ring 25 is advantageously adapted to the contour of the shoulder 24 of the wall 7 and forms in the assembled state of the switching device 1 is a kind of undercut.
  • the contour of the fixing ring 25 and the paragraph 24 may have different shapes.
  • the paragraph 24 may be formed as a circumferential groove or protruding from the wall 7 web.
  • the number of feet 16 can be made freely and the feet 16 can also be configured as circular segments or as a continuous ring to connect to the circuit board 13.

Landscapes

  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Description

Die Erfindung bezieht sich auf eine Schaltvorrichtung nach dem Oberbegriff des Patentanspruches 1.The invention relates to a switching device according to the preamble of claim 1.

Eine derartige Schaltvorrichtung ist beispielsweise der EP 2 645 391 A1 zu entnehmen. Dort ist eine biegeelastische und elektrisch leitfähige Schnappscheibe vorgesehen, die an einem dünnwandigen Körper angebracht ist. Die Schnappscheibe und der Körper sind fest auf der Oberfläche einer Leiterplatte montiert, auf der mindestens ein elektrischer Schaltkontakt, der in Richtung der Schnappscheibe von der Leiterplatte absteht, vorgesehen ist.Such a switching device is for example the EP 2 645 391 A1 refer to. There, a flexurally elastic and electrically conductive snap-action disc is provided, which is attached to a thin-walled body. The snap-action disc and the body are fixedly mounted on the surface of a printed circuit board on which at least one electrical switching contact which projects in the direction of the snap-action disc from the printed circuit board is provided.

Beim Durchdrücken der Schnappscheibe entsteht zwischen den beiden Schaltkontakten ein Kurzschluss, durch den ein elektrisches Signal generierbar ist, das mittels einer Auswerte- und Steuereinrichtung in ein elektrisches Schaltsignal umwandelbar ist.When the snap-action disk is pressed through, a short-circuit arises between the two switching contacts, by means of which an electrical signal can be generated, which can be converted into an electrical switching signal by means of an evaluation and control device.

Solche Schaltvorrichtungen haben sich in der Praxis zwar bewährt, weisen jedoch den Nachteil auf, dass diese ausschließlich in elektrischen Geräten verwendet werden können, die einen entsprechend groß bemessenen Bauraum auf der Leiterplatte aufweisen, in dem nämlich die Schaltvorrichtung einbaubar ist. Die Schaltvorrichtung und die Leiterplatte benötigen einen vorgegebenen Bauraum.Such switching devices have proven themselves in practice, but have the disadvantage that they can be used exclusively in electrical equipment, which have a correspondingly large space on the circuit board, namely, in which the switching device is installed. The switching device and the circuit board require a given space.

Zudem ist die Befestigung des Körpers und der Schnappscheibe an der Leiterplatte oftmals problematisch, denn solche Schaltvorrichtungen sollen in Umgebungen eingesetzt werden, in denen Verschmutzungen in flüssiger oder gasförmiger Zusammensetzung vorliegen, die dann zwischen den Körper und der Leiterplatte in Richtung des Schaltkontaktes eindringen und diesen verschmutzen, korrigieren oder anderweitig beschädigen.In addition, the attachment of the body and the snap-action disc on the circuit board is often problematic, because such switching devices are to be used in environments in which contaminants are in liquid or gaseous composition, which then penetrate between the body and the circuit board in the direction of the switching contact and pollute it , correct or otherwise damage.

Darüber hinaus ist die Herstellung solcher Schaltvorrichtungen äußerst kostenintensiv, da mehrere Herstellungsschritte zur Fertigung der Schaltvorrichtung und zu deren Fixierung an der Leiterplatte notwendig sind.In addition, the production of such switching devices is extremely expensive, since several manufacturing steps for the manufacture of the switching device and their fixation on the circuit board are necessary.

Es ist daher Aufgabe der Erfindung, eine Schaltvorrichtung der eingangs genannten Gattung derart weiterzubilden, dass diese einerseits einen erheblich reduzierten Bauraum aufweist und andererseits äußerst kostengünstig herstellbar ist und auf einfache und unkomplizierte Weise mit einer Leiterplatte verbunden werden kann, ohne dass die Leiterplatte den vorhandenen Bauraum für die Schaltvorrichtung beeinträchtigt bzw. diesen reduziert.It is therefore an object of the invention to develop a switching device of the type mentioned in such a way that on the one hand has a significantly reduced space and on the other hand is extremely inexpensive to produce and can be connected in a simple and straightforward way with a circuit board, without the circuit board the existing space compromised or reduced for the switching device.

Diese Aufgaben sind erfindungsgemäß durch die Merkmale des kennzeichnenden Teils 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 das Gehäuse und das Schaltelement einen Raum einschließen, dass in dem Boden des Gehäuses mindestens ein Schaltkontakt vorgesehen ist und dass der jeweilige Schaltkontakt in Richtung des Schaltelementes und aus der Außenkontur des Gehäuses übersteht, ist gewährleistet, dass der Schaltkontakt zum einen nach außen luft- und/oder wasserdicht verschlossen ist und zum anderen, dass die räumlichen Abmessungen des Gehäuses derart klein ausgestaltet sein können, dass dieses auch in Bauteilen eingesetzt werden kann, in denen lediglich eine geringe räumliche Ausdehnung für solche Schaltvorrichtungen vorhanden ist. Diese Schaltvorrichtungen dienen in Schließanlagen beispielweise nämlich dazu, die in das Schloss eingeführten Schlüssel zu verifizieren, so dass diese berechtigt sind, das Türschloss zu öffnen. Eine Vielzahl solcher Schaltvorrichtungen sind demnach in der Schließanlage derart positioniert, dass ausschließlich der Schlüssel sämtliche der Schaltvorrichtungen gleichzeitig betätigt, der die korrekte Zugangsberechtigung für das Schloss aufweist.Characterized in that the housing and the switching element include a space that in the bottom of the housing at least one switching contact is provided and that the respective switching contact protrudes in the direction of the switching element and from the outer contour of the housing, it is ensured that the switching contact on the one hand to the outside is closed air and / or watertight and on the other hand, that the spatial dimensions of the housing can be configured so small that this can also be used in components in which only a small spatial extent for such switching devices is present. For example, in lock systems, these switching devices serve to verify the keys inserted in the lock so that they are authorized, to open the door lock. A plurality of such switching devices are thus positioned in the locking system such that only the key simultaneously actuates all of the switching devices having the correct access authorization for the lock.

Da die Leiterplatte außerhalb der Schaltvorrichtung positioniert ist, nimmt diese keinen Platz ein, sondern kann vielmehr räumlich entfernt von der jeweiligen Schaltvorrichtung eingebaut werden. Die in das Gehäuse der Schaltvorrichtung eingegossenen oder eingeklebten oder anderweitig dort befestigten Schaltkontakte sind fest an dem Gehäuse fixiert und ragen sowohl in Richtung des Schaltelementes als auch nach außen, so dass diese als Leiter verwendet werden können, um die Betätigung des Schaltelementes elektrisch auszuwerten.Since the printed circuit board is positioned outside of the switching device, this takes up no space, but rather can be installed spatially removed from the respective switching device. The molded into the housing of the switching device or glued or otherwise fastened there switch contacts are fixed to the housing and protrude both in the direction of the switching element and to the outside, so that they can be used as a conductor to evaluate the operation of the switching element electrically.

Es ist besonders vorteilhaft, wenn das Schaltelement mittels Bördelung oder Ultraschallschweißen mit dem Gehäuse verbunden ist, denn dadurch ist zum einen das Schaltelement fest mit dem Gehäuse fixiert und zum anderen sind die Übergangsbereiche zwischen dem Schaltelement und dem Gehäuse luft- bzw. wasserdicht verschlossen, so dass der von der Schnappscheibe und dem Gehäuse eingeschlossene Innenraum vollständig abgedichtet ist.It is particularly advantageous if the switching element is connected by means of crimping or ultrasonic welding to the housing, because on the one hand, the switching element is firmly fixed to the housing and on the other hand, the transition areas between the switching element and the housing air or water-tight, so that the interior enclosed by the snap-action disc and the housing is completely sealed.

In der Zeichnung sind drei erfindungsgemäße Ausführungsbeispiele einer Schaltvorrichtung dargestellt, die nachfolgend im Einzelnen erläutert ist. Im Einzelnen zeigt:

Figur 1a
eine Schaltvorrichtung mit einem Schaltelement und einem fest mit diesem verbundenen Gehäuse in dem zwei Schaltkontakte vorgesehen sind, die mit einer Leiterbahn, die benachbart zu dem Gehäuse angeordnet ist, verbunden ist, im Schnitt,
Figur 1b
die Schaltvorrichtung gemäß Figur 1a, in perspektivischer Ansicht von oben,
Figur 2a
die Schaltvorrichtung gemäß Figur 1a, bei der das Schaltelement mittels Ultraschallschweißen mit dem Gehäuse verbunden ist,
Figur 2b
die Schaltvorrichtung gemäß Figur 2a, in perspektivischer Ansicht von oben,
Figur 3
ein zweites Ausführungsbeispiel der Schaltvorrichtung gemäß Figur 1a mit einem zusätzlich am Gehäuse befestigten Betätigungselement,
Figur 4
das Gehäuse gemäß Figuren 1a und 2a, von unten, an dem vier Befestigungsfüße vorgesehen sind und
Figur 5
ein drittes Ausführungsbeispiel der Schaltvorrichtung gemäß Figur 1a mit einem zusätzlich über das Gehäuse gestülptes Betätigungselement in Form einer Kappe.
In the drawing, three embodiments of a switching device according to the invention are shown, which is explained in detail below. In detail shows:
FIG. 1a
a switching device having a switching element and a housing fixedly connected thereto in which two switch contacts are provided, which is connected to a conductor track, which is arranged adjacent to the housing, in section,
FIG. 1b
the switching device according to FIG. 1a , in a perspective view from above,
FIG. 2a
the switching device according to FIG. 1a in which the switching element is connected to the housing by means of ultrasonic welding,
FIG. 2b
the switching device according to FIG. 2a , in a perspective view from above,
FIG. 3
A second embodiment of the switching device according to FIG. 1a with an additionally attached to the housing actuator,
FIG. 4
the housing according to FIGS. 1a and 2a , from below, where four mounting feet are provided and
FIG. 5
a third embodiment of the switching device according to FIG. 1a with an additionally slipped over the housing actuator in the form of a cap.

In den Figuren 1a und 1b ist eine Schaltvorrichtung 1 abgebildet, durch die eine mechanisch ausgelöste Bewegung in ein elektrisches Schaltsignal umgewandelt ist, um beispielsweise eine Werkzeugmaschine oder ein sonstiges elektrisches Gerät zu steuern. Die Schaltvorrichtung 1 kann als Miniaturbauteil auch in einer Schließanlage oder einem Schloss einer Tür eingebaut sein und durch die Zacken eines Schlüssels betätigt werden. Der zur Verfügung stehende Bauraum für die Schaltvorrichtung 1 ist dabei äußerst gering bemessen, so dass die Schaltvorrichtung 1 als Miniaturausführung eine räumliche Ausdehnung von 3 auf 3 Millimeter oder einen Durchmesser von ca. 3 Millimeter aufweist.In the FIGS. 1a and 1b there is illustrated a switching device 1 by which a mechanically induced movement is converted into an electrical switching signal to control, for example, a machine tool or other electrical device. The switching device 1 can be installed as a miniature component in a locking system or a lock of a door and operated by the teeth of a key. The available space for the switching device 1 is dimensioned extremely small, so that the switching device 1 as a miniature version has a spatial extent of 3 to 3 millimeters or a diameter of about 3 millimeters.

Die Schaltvorrichtung 1 besteht aus einem formfesten und temperaturbeständigen Kunststoff-Werkstoff hergestellten Gehäuse 2 und einem fest mit diesem verbundenen Schaltelement 3. Das Schaltelement 3 ist entweder vollständig aus einem elektrisch leitfähigen Werkstoff, beispielsweise einem Metall, hergestellt oder zumindest bereichsweise mit einem elektrisch leitfähigen Werkstoff beschichtet. Das Schaltelement 3 wird in der Fachliteratur auch als Schnappscheibe bezeichnet, denn das Schaltelement 3 wird beim Betätigen in die Bewegungsrichtung 4 aus der Ausgangsposition, die konkav nach außen gekrümmt ist, in eine konvexe Krümmung überführt und in Richtung eines Schaltkontaktes 11 bewegt. Der Schaltkontakt 11 ist dabei fester Bestandteil des Gehäuses 2.The switching device 1 is made of a dimensionally stable and temperature-resistant plastic material produced housing 2 and a permanently connected thereto switching element 3. The switching element 3 is either completely made of an electrically conductive material, such as a metal, or at least partially coated with an electrically conductive material , The switching element 3 is also referred to in the specialist literature as a snap-action disk, because the switching element 3 is pressed into the direction of movement 4 from the starting position, which is concavely curved outwards, into a convex curvature transferred and moved in the direction of a switching contact 11. The switching contact 11 is an integral part of the housing. 2

Der Schaltkontakt 11 kann als Kugel oder als zylinderförmiger, vollständig geschlossener oder rohrförmiger Körper ausgestaltet sein. Dem Schaltkontakt 11 kann auch ein Steg, eine Nut oder vergleichbares angeformt sein, die einen Formschluss mit dem Gehäuse 2 bilden. Es ist erfindungswesentlich, dass der Schaltkontakt 11 aus einem elektrisch leitfähigen Werkstoff hergestellt ist.The switching contact 11 may be configured as a ball or as a cylindrical, completely closed or tubular body. The switching contact 11 may also be a web, a groove or similar formed, which form a positive connection with the housing 2. It is essential to the invention that the switching contact 11 is made of an electrically conductive material.

Der Schaltkontakt 11, der in den Ausführungsbeispielen der Figuren 1a und 1b aus zwei Kugeln gebildet ist, ist fest in das Gehäuse 2 eingebettet. Während der Herstellung des Schaltelementes 1 werden der Schalkontakt 11 bzw. die Kugeln derart durch die flüssige Kunststoffmasse eingebettet, so dass der jeweilige als Kugel ausgestaltete Schaltkontakt 11 im Bereich des Gehäuses 2 ummantelt ist.The switching contact 11, which in the embodiments of the FIGS. 1a and 1b is formed of two balls, is firmly embedded in the housing 2. During the production of the switching element 1, the contact contact 11 or the balls are embedded in such a way by the liquid plastic compound, so that the respective formed as a ball switching contact 11 is coated in the region of the housing 2.

Dabei ist es technisch zwingend erforderlich, dass der jeweilige Schaltkontakt 11 sowohl in Richtung des Schaltelementes 3 als auch aus dem Gehäuse 2 übersteht. Das Gehäuse 2 weist einen planen Boden 6 auf, von dem der jeweilige Schaltkontakt 11 übersteht.It is technically imperative that the respective switching contact 11 protrudes both in the direction of the switching element 3 and from the housing 2. The housing 2 has a flat bottom 6, from which the respective switching contact 11 projects.

Das Gehäuse 2 und das Schaltelement 3 bilden einen vollständig luft- und/oder wasserdicht geschlossenen Raum 5, in den der jeweilige Schaltkontakt 11 hineinragt. Beim Durchdrücken in die Bewegungsrichtung 4 des Schaltelementes 3 gelangt diese mit den beiden Schaltkontakten 11 in Berührung, so dass ein elektrischer Kurzschluss entsteht, wodurch das elektrische Schaltsignal gebildet ist.The housing 2 and the switching element 3 form a completely air and / or watertight closed space 5, in which the respective switching contact 11 protrudes. When pushing in the direction of movement 4 of the switching element 3, this comes into contact with the two switching contacts 11, so that an electrical short circuit is formed, whereby the electrical switching signal is formed.

Um das Schaftelement 3 fest und luft- bzw. wasserdicht mit dem Gehäuse 2 zu verbinden, ist eine Klebeschicht 21 vorgesehen und das Gehäuse 2 weist eine senkrecht von dem Boden 12 abstehende Wand 7 auf, die eine L-förmige Innenquerschnittskontur einnimmt und eine Anlagefläche für das Schaltelement 3 aufweist. Zwischen der Innenseite der Wand 7 ist die Schnappscheibe bzw. das Schaltelement 3 auf der Anlagefläche positioniert. Mittels der Klebeschicht 21 ist das Schaltelement 3 fest sowie wasser- bzw. luftdicht mit dem Gehäuse 2 verbunden, so dass die Schnappscheibe bzw. das Schaltelement 3 im Bereich der Anlagefläche nicht relativ zu dem Gehäuse 2 bewegbar ist, sondern lediglich das Zentrum des Schaltelementes 3 in Richtung der Schaltkontakte 11 bewegbar ist.In order to connect the shaft member 3 firmly and air-tight or watertight to the housing 2, an adhesive layer 21 is provided and the housing 2 has a vertically projecting from the bottom 12 wall 7, which occupies an L-shaped inner cross-sectional contour and a contact surface for having the switching element 3. Between the inside of the wall 7, the snap-action disc or the switching element 3 is positioned on the contact surface. By means of the adhesive layer 21, the switching element 3 is firmly and water or airtight connected to the housing 2, so that the snap disc or the switching element 3 in the region of the contact surface is not movable relative to the housing 2, but only the center of the switching element 3 in the direction of the switching contacts 11 is movable.

Dadurch, dass die Schnappscheibe bzw. das Schaltelement 3 in seinem Zentrum eine Kuppe oder eine domförmig ausgestaltete Querschnittskontur aufweist, erhöht sich die Stabilität des Schaltelementes 3, denn die Kuppe versteift das dünnwandige Schaltelement 3 und kann gleichzeitig zusätzlich in Richtung des jeweiligen Schaltkontaktes 11 bewegt sein.The fact that the snap disc or the switching element 3 has a dome or a dome-shaped cross-sectional contour in its center increases the stability of the switching element 3, because the dome stiffens the thin-walled switching element 3 and can also be moved simultaneously in the direction of the respective switching contact 11 ,

In den Figuren 2a und 2b ist die Klebeschicht 21 durch eine Ultraschallbördelung 22 ersetzt, durch die ein Überstand der Wand 7 geschaffen ist, der kraft- bzw. formschlüssig mit dem Schaltelement 3 zusammenwirkt. Zwischen dem Schaltelement 3 und dem Gehäuse 2 entsteht eine feste Verbindung und darüber hinaus ist der Spalt zwischen dem Gehäuse 2 bzw. dessen Wand 7 und dem Schaltelement 2 derart abgedichtet, so dass weder Wasser noch Gaspartikel in den Raum 5 eindringen können.In the FIGS. 2a and 2 B the adhesive layer 21 is replaced by an ultrasonic beading 22, through which a projection of the wall 7 is provided, which cooperates with the switching element 3 in a force-locking or form-fitting manner. Between the switching element 3 and the housing 2, a firm connection is formed and, moreover, the gap between the housing 2 or its wall 7 and the switching element 2 is sealed in such a way that neither water nor gas particles can penetrate into the space 5.

Beiden Ausführungsvarianten der Figuren 1a, 1b bzw. 2a und 2b ist gemeinsam, dass das jeweilige Schaltelement 3 von außen frei zugänglich ist. Sowohl die Klebeschicht 21 als auch die Ultraschallbördelung 22 verlaufen ringförmig im Außenbereich des jeweiligen Schaltelementes 3.Both variants of the FIGS. 1a . 1b or 2a and 2b have in common that the respective switching element 3 is freely accessible from the outside. Both the adhesive layer 21 and the ultrasonic beading 22 extend annularly in the outer region of the respective switching element 3.

In Figur 3 ist gezeigt, dass die jeweilige Schnappscheibe bzw. das Schaltelement 3 mittels eines Betätigungselementes 15 vollständig abgedeckt ist. Das Betätigungselement 15 liegt in der Ausgangsposition des Schaltelementes 3 auf diesem auf und ist nach außen geformt. Beim Betätigen des Betätigungselementes 15 in die Bewegungsrichtung 4 wird daher sowohl das Betätigungselement 15 als auch das Schaltelement 3 in Richtung der jeweiligen Schaltkontakte 11 bewegt.In FIG. 3 It is shown that the respective snap-action disc or the switching element 3 is completely covered by means of an actuating element 15. The actuating element 15 is in the starting position of the switching element 3 on this and is shaped to the outside. When actuating the actuating element 15 in the direction of movement 4, therefore, both the actuating element 15 and the switching element 3 in the direction of the respective switching contacts 11 is moved.

Ein elektrischer Impuls ist beispielsweise durch das Betätigen des Schaltelementes 3 in die Bewegungsrichtung 4 und einer elektrischen Verbindung zwischen zwei benachbarten Schaltkontakten 11 generiert. Der Impuls wird von den Schaltkontakten 11 und mittels einer Leiterplatte 13, auf der eine Vielzahl von Leiterbahnen 14, beispielsweise gitterförmig angeordnet sind, aufgenommen und wird im üblicher technischer Weise an eine Auswerte- und Steuereinrichtung, beispielsweise ein Mikroprozessor, weitergeleitet.An electrical pulse is generated for example by the actuation of the switching element 3 in the direction of movement 4 and an electrical connection between two adjacent switching contacts 11. The pulse is received by the switch contacts 11 and by means of a printed circuit board 13, on which a plurality of conductor tracks 14, for example, are arranged in a grid, and is forwarded in the usual technical way to an evaluation and control device, such as a microprocessor.

In Figur 4 ist gezeigt, dass am Boden 6, der zur Leiterplatte 13 zugewandten Seite der Schaltvorrichtung 1, vier Füße 16 angeformt sind. Die jeweilige Schaltvorrichtung 1 kann fest mit der Leiterplatte 13 über diese Füße 16 verbunden sein. Mittels einer Schweißnaht, einer Lötverbindung, einer Klebeverbindung, einer Klippverbindung oder einer Schaubverbindung kann der jeweilige Fuß 16 mit der Leiterplatte 13 verbunden sein, so dass eine feste Arretierung zwischen dem Gehäuse 2 der Schaltvorrichtung 1 und der Leiterplatte 13 hergestellt ist.In FIG. 4 It is shown that four feet 16 are formed on the bottom 6 of the circuit board 13 facing side of the switching device 1. The respective switching device 1 can be firmly connected to the printed circuit board 13 via these feet 16. By means of a weld, a solder joint, an adhesive bond, a clip connection or a Schaub connection the respective foot 16 may be connected to the circuit board 13, so that a firm locking between the housing 2 of the switching device 1 and the circuit board 13 is made.

In der Figur 5 ist gezeigt, dass die jeweilige Schnappscheibe bzw. das Schaltelement 3 durch eine Kappe 23 vollständig abgedeckt ist. Die Kappe 23 umgreift ganz oder teilweise die Wand 7 und ein Fixierring 25 ist auf der der Wand 7 zugewandten Seite derart an der Kappe 23 angeformt, dass der Fixierring 25 in einen Absatz 24 in die Wand 7 eingreift nach Art einer Hinterschneidung. Die Kappe 23 ist somit durch den Fixierring 25 luft- und flüssigkeitsdicht auf die Schaltvorrichtung 1 aufgeklipst. Die Kappe 23 liegt in der Ausgangsposition des Schaltelementes 3 auf diesem auf. Die Kappe 23 ist aus einem verformbaren und elastischen Materials gebildet, so dass beim Betätigen der Kappe 23 in die Bewegungsrichtung 4 sowohl die Kappe 23 als auch das Schaltelement 3 in Richtung der jeweiligen Schaltkontakte 11 bewegt sind.In the FIG. 5 It is shown that the respective snap disc or the switching element 3 is completely covered by a cap 23. The cap 23 completely or partially surrounds the wall 7 and a fixing ring 25 is formed on the wall 7 side facing the cap 23 so that the fixing ring 25 engages in a shoulder 24 in the wall 7 in the manner of an undercut. The cap 23 is thus air-tightly and clipped by the fixing ring 25 on the switching device 1. The cap 23 is in the starting position of the switching element 3 on this. The cap 23 is formed of a deformable and elastic material, so that when the cap 23 is actuated in the direction of movement 4, both the cap 23 and the switching element 3 are moved in the direction of the respective switching contacts 11.

Die Kontur des Fixierringes 25 ist vorteilhafter Weise an die Kontur des Absatzes 24 der Wand 7 angepasst und bildet im zusammengebauten Zustand der Schaltvorrichtung 1 eine Art Hinterschneidung. Die Kontur des Fixierringes 25 bzw. des Absatzes 24 kann unterschiedliche Formen aufweisen. Auch kann der Absatz 24 als umlaufende Nut oder als von der Wand 7 abstehender Steg ausgeformt sein.The contour of the fixing ring 25 is advantageously adapted to the contour of the shoulder 24 of the wall 7 and forms in the assembled state of the switching device 1 is a kind of undercut. The contour of the fixing ring 25 and the paragraph 24 may have different shapes. Also, the paragraph 24 may be formed as a circumferential groove or protruding from the wall 7 web.

Die Anzahl der Füße 16 kann frei gestaltet werden und die Füße 16 können auch als Kreissegmente bzw. als ein durchgehender Ring ausgestaltet sein, um diesen mit der Leiterplatte 13 zu verbinden.The number of feet 16 can be made freely and the feet 16 can also be configured as circular segments or as a continuous ring to connect to the circuit board 13.

Claims (15)

  1. A switching device (1) for converting a mechanical movement into an electrical switching signal, comprising a housing (2) with a base (6) and a wall (7) projecting at right angles from the base (6) and an electrical switching element (3) configured as a snap disc that is connected to the housing (2) and can be moved relative to it, in which case the housing (2) and the switching element (3) enclose a space (5),
    characterised in that,
    the snap disc or the switching element (3) is positioned on a contact surface on an inside of the wall (7), that at least two switching contacts (11) are provided in the base (6) of the housing (2) and that the particular switching contacts (11) project in the direction of the switching element (3) and out of the outer contour of the base (6).
  2. The switching device (1) in accordance with Claim 1,
    characterised in that,
    the switching contact (11) is configured as a ball or a cylindrically shaped conductor made of an electrically conductive material.
  3. The switching device (1) in accordance with Claim 1 or 2,
    characterised in that,
    the particular switching contact (11) is embedded in the base (6) of the housing (2) and is firmly connected to it.
  4. The switching device (1) in accordance with Claim 3,
    characterised in that,
    the particular switching contact (11) is inserted into a passage opening worked into the base (6) of the housing (2), and is glued into this passage opening.
  5. The switching device (1) in accordance with Claim 3,
    characterised in that,
    the particular switching contact (11) is connected to the housing (2) during manufacture of the base (6) in the injection moulding process.
  6. The switching device (1) in accordance with one of the aforementioned claims,
    characterised in that,
    at least one foot (16) is provided on the base (6) and at a distance from it, in which case the foot (16) can be connected to an external component, preferably a circuit board (13).
  7. The switching device (1) in accordance with Claim 6,
    characterised in that,
    the foot (16) is connected to the external components, and that the material of the housing (2) is made of a temperature-resistant and dimensionally stable substance.
  8. The switching device (1) in accordance with one of the aforementioned claims,
    characterised in that,
    the switching element (3) is connected by means of a glued connection (21) or ultrasonic flanging (22).
  9. The switching device (1) in accordance with Claim 8,
    characterised in that,
    the glued connection (21) or the ultrasonic flanging (22) has a ring shape, and that the switching element (3) can be freely accessed from outside.
  10. The switching device (1) in accordance with one of the aforementioned claims,
    characterised in that,
    the switching element (3) is configured as a snap disc with an additional dome pointing upwards.
  11. The switching device (1) in accordance with one of the aforementioned claims,
    characterised in that,
    the switching element (3) has at least one zone with a concave curvature towards the outside which can be bent elastically when the switching element (3) is actuated in the direction of the particular switching contact (11).
  12. The switching device (1) in accordance with one of the aforementioned claims,
    characterised in that,
    a pressure piece is attached to the housing (2) which is arranged adjacent to the particular switching element (3), by means of which the switching element (3) can be activated when the pressure piece is advanced axially.
  13. The switching device (1) in accordance with one of the aforementioned claims,
    characterised in that,
    the housing (2) has external dimensions in the range between one and three millimetres in diameter or an edge length from one to three millimetres.
  14. The switching device (1) in accordance with one of the aforementioned claims,
    characterised in that,
    an actuating element (15) or a cap (23) is firmly arranged on the side of the switching element (3) facing away from the housing (2), and transfers a movement of the actuating element in the movement direction (4) onto the switching element (3).
  15. The switching device (1) in accordance with Claim 14,
    characterised in that,
    the actuating element (15) or the cap (23) partially or entirely encloses the wall (7) of the switching device (7), that a shoulder (24) is formed onto the wall (7) and a fixing ring (25) is formed onto the side of the actuating element (15) or the cap (23) facing away from the wall (7), and that the shoulder (24) and the fixing ring (25) make a clip-on connection in the form of an undercut in the assembled condition, in such a way that the actuating element (15) or the cap (23) is held in a positional orientation on the switching device (1).
EP15151138.3A 2015-01-14 2015-01-14 Switching device Active EP3046126B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP15151138.3A EP3046126B1 (en) 2015-01-14 2015-01-14 Switching device
US14/994,624 US10734173B2 (en) 2015-01-14 2016-01-13 Switching device
CN201610022579.0A CN105788920B (en) 2015-01-14 2016-01-14 Switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15151138.3A EP3046126B1 (en) 2015-01-14 2015-01-14 Switching device

Publications (2)

Publication Number Publication Date
EP3046126A1 EP3046126A1 (en) 2016-07-20
EP3046126B1 true EP3046126B1 (en) 2018-10-10

Family

ID=52350007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15151138.3A Active EP3046126B1 (en) 2015-01-14 2015-01-14 Switching device

Country Status (3)

Country Link
US (1) US10734173B2 (en)
EP (1) EP3046126B1 (en)
CN (1) CN105788920B (en)

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Publication number Priority date Publication date Assignee Title
USD809467S1 (en) * 2015-03-23 2018-02-06 Citizen Electronics Co., Ltd. Switch
USD807835S1 (en) * 2015-06-30 2018-01-16 Whirlpool Corporation Button

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JP2002352657A (en) * 2001-05-25 2002-12-06 Shin Etsu Polymer Co Ltd Member for push-button switch and manufacturing method therefor
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Also Published As

Publication number Publication date
US10734173B2 (en) 2020-08-04
EP3046126A1 (en) 2016-07-20
CN105788920B (en) 2021-03-02
US20160203925A1 (en) 2016-07-14
CN105788920A (en) 2016-07-20

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