EP2556522B1 - Electrical snap-action switch - Google Patents
Electrical snap-action switch Download PDFInfo
- Publication number
- EP2556522B1 EP2556522B1 EP12702186.3A EP12702186A EP2556522B1 EP 2556522 B1 EP2556522 B1 EP 2556522B1 EP 12702186 A EP12702186 A EP 12702186A EP 2556522 B1 EP2556522 B1 EP 2556522B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- action switch
- switch
- snap
- contact bridge
- 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.)
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- 125000006850 spacer group Chemical group 0.000 claims description 10
- 239000000969 carrier Substances 0.000 claims description 5
- 239000012777 electrically insulating material Substances 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 17
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
- H01H5/30—Energy stored by deformation of elastic members by buckling of disc springs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2025—Bridging contacts comprising two-parallel bridges
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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
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/20—Driving mechanisms
- H01H13/22—Driving mechanisms acting with snap action
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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
- H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
Definitions
- the invention relates to an electrical snap-action switch with a contact bridge which can be actuated via a switch plunger and a bistable spring arrangement, which can be connected in a first switch position to at least one first contact pair and in a second switch position to at least one second contact pair, wherein the spring arrangement has at least one each on both sides of the switch plunger Having spring arm, which furthermore in the event of breakage of one of the spring arms, the contact bridge is displaceable transversely to the direction of movement of the switching plunger to a Verschiebeendlage.
- lever elements are still provided for a positive opening in some applications. These lever elements are usually pivotable on the switch plunger and can be applied with one end to the contact bridge and lead with sufficient force on the switch plunger to a pressure of the contact bridge of the contacts and thus to a compulsive opening the switch position.
- an additional spring element in the snap-action switch can be integrated such that the position of the contact bridge is stabilized in this rest position by the force of this spring element.
- a disadvantage of in the DE 296 14 028 U1 indicated path is, however, that the voltage applied to breakage of a spring arm at the contact bridge moment is relatively low.
- the snap-action switch accelerating forces, the moment is not sufficient for a permanent opening of the switch positions. Especially when dynamic movements occur, it can therefore come to an undesirable displacement and / or rotation of the contact bridge and thus one of the switch positions are brought about unintentionally.
- This object is achieved in that a sliding ramp is provided in the displacement of the contact bridge, which spaced at break a spring arm at least one contact of the contact bridge in Verschiebeendlage of the associated contact of the respective contact pair.
- both the first and the second switching position of the snap-action switch is avoided.
- the contact bridge is spaced from the contact pair of the first and / or second switching position.
- the undamaged spring arm acts on the contact bridge in such a way that a positive opening of the snap-action switch is ensured even in the case of externally acting on the snap-action switch, in particular dynamic forces.
- the slide ramps are arranged on the contact bridge on both sides of the switch plunger.
- the arrangement of the slide ramps on the contact bridge a simple design of the slide ramps can be implemented.
- the contact bridge comprises two substantially mutually parallel contact carrier, which are spaced and connected via at least two electrically insulating spacers, wherein the spacers are arranged on both sides of the switch plunger and the slide ramps through the contact carrier protruding ends of the spacers are formed.
- the manufacturing effort for the slide ramps is further reduced.
- each contact of the contact pairs is spaced by a separate sliding ramp of the contact bridge.
- the slide ramps have a substantially wedge-shaped configuration, the distance between the contact bridge and the respective contact pair is constantly changed with increasing displacement when the contact bridge is displaced transversely to the direction of movement of the switch plunger. As a result, jerky movements of the contact bridge during the Movable avoidable and ensures a uniform guidance of the contact bridge in the Verschiebeendlage.
- the contacts of the contact pairs with a respective sliding ramp facing ramp are executable. Accordingly, the risk of wedging the contact bridge or the sliding bridge associated with this contact bridge is minimized with the respective contact of the contact pair.
- the ramp can be implemented in a simple manner as a result of a bending operation of the respective contact.
- the in the FIGS. 1 and 2 shown electric snap-action switch 1 comprises a switch plunger 2, which is arranged centrally in a housing 3 and in two areas of the Housing 3 is mounted axially displaceable.
- An upper and lower stop area 4 and 5 on the switch plunger 2 set the displacement of the switch plunger 2 fixed.
- rest position of the switching plunger 2 due to the spring force of a spring element 6 in an upper position in which the upper stop portion 4 rests on the housing 3, held.
- the two snap springs 7 are designed as two substantially omega-shaped spring arms and arranged substantially symmetrically to the direction of movement of the switch plunger 2.
- the other ends of the snap springs 7 in turn are each supported in a notch of a spacer 8.
- the two, also on both sides of the switch plunger 2 arranged spacers 8 form together with two contact carriers 9 a contact bridge 10.
- the spacers 8 serve to receive the two, substantially parallel to each other contact carrier 9.
- Die respective ends of the spacers 8 projecting beyond the contact carriers 9 are each designed as sliding ramps 11, the sliding ramps 11 comprising a substantially wedge-shaped flank and a substantially horizontally extending support area.
- the contact bridge 10 is connected via a contact carrier 9 with a first contact pair 12.
- the other contact carrier 9 is at the same time spaced from a second contact pair 13.
- individual contact elements 14 are also arranged on the contact carrier.
- the contacts of the first pair of contacts 12 are also partially bent, whereby in these areas a curved ramp is shown.
- the respective contact of the contact pairs 12 and 13 comprises two substantially V-shaped converging contact edges 15, which merge into a separate, horizontal support area 16.
- the snap springs 7 comprehensive spring arrangement is aligned so that when moving the switch plunger 2 transversely to the contact bridge 10, a snap-over of the contact bridge 10 takes place when a Umschnappéess is exceeded.
- the second switching position of the switching plunger 2 is moved by an actuating force against the spring force of the spring element 6, while changing the position of the snap springs 7 at the same time.
- the contact bridge 10 Upon reaching the predetermined by the construction of the snap springs 7 Umschnappluates, the contact bridge 10 snaps into a second switching position, wherein in this second switching position, a second contact pair 13 is connected via a contact carrier 9 and wherein the other contact carrier 9 is spaced from the first contact pair 12 , If the applied from the outside on the switch plunger 2 actuation force is interrupted in the connection, the switch plunger 2 is moved upwards again due to the force of the snap springs 7, whereby finally the contact bridge 10 snaps back into the first switching position.
- Fig. 2 illustrates the behavior of the invention, electrical snap-action switch 1 immediately after breaking one of the snap springs 7.
- the contact bridge 10 is here after breaking a snap spring 7 transversely to the direction of movement of the switch plunger 2 shifted until the slide ramps 11 according to the Fig. 2 at least at a contact of a contact pair 12 or 13 comes in a Verschiebeendlage to the plant. While the broken snap spring 7 can exert no more force on the contact bridge 10 immediately after breakage, the undamaged snap spring 7 relaxes and thus shifts due to the changing balance of forces, the contact bridge 10 transverse to the direction of movement of the switch plunger 2.
- the displacement of the contact bridge is important Impact of the slide ramp 11 on a contact of a contact pair 12 or 13 to a sliding of the substantially wedge-shaped edge of the slide ramp 11 and thus to a lifting of the contact bridge 10 of the respective contact of the contact pair 12 or 13.
- the sliding ramp 11 lies with a substantially horizontal running Support area flat on the horizontal bearing surface 16 of the contact of a contact pair 12 or 13 at.
- the displacement is in this case influenced essentially by the spring properties of the respective undamaged snap spring 7.
- a displacement limit 17 is further provided on the housing 3, at which the end faces of the contact carrier 9 come in a further displacement of the contact bridge 10 to the plant.
- the detailed view of the Fig. 3 illustrates the surface contact of the slide ramp 11 at the contact of the first pair of contacts 12.
- the contact here has two, substantially v-shaped converging contact edges 15 and two adjacent to these contact edges 15, horizontal bearing surfaces 16, the flat in the Verschiebeendlage shown abut the horizontal support region of the sliding ramp 11.
Landscapes
- Push-Button Switches (AREA)
- Slide Switches (AREA)
- Mechanisms For Operating Contacts (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Description
Die Erfindung betrifft einen elektrischen Schnappschalter mit einer über einen Schaltstößel und eine bistabile Federanordnung betätigbaren Kontaktbrücke, die in einer ersten Schaltstellung mit zumindest einem ersten Kontaktpaar und in einer zweiten Schaltstellung mit zumindest einem zweiten Kontaktpaar verbindbar ist, wobei die Federanordnung beidseitig des Schaltstößels jeweils mindestens einen Federarm aufweist, worüber ferner bei Bruch einer der Federarme die Kontaktbrücke quer zur Bewegungsrichtung des Schaltstößels bis hin zu einer Verschiebeendlage verschiebbar ist.The invention relates to an electrical snap-action switch with a contact bridge which can be actuated via a switch plunger and a bistable spring arrangement, which can be connected in a first switch position to at least one first contact pair and in a second switch position to at least one second contact pair, wherein the spring arrangement has at least one each on both sides of the switch plunger Having spring arm, which furthermore in the event of breakage of one of the spring arms, the contact bridge is displaceable transversely to the direction of movement of the switching plunger to a Verschiebeendlage.
Aus dem Stand der Technik sind zahlreiche elektrische Schnappschalter bekannt, in denen voneinander getrennte Kontaktpaare jeweils in einer von zwei Schaltstellungen über eine Kontaktbrücke miteinander verbindbar sind. Die Lage der Kontaktbrücke wird dabei über eine Betätigungseinheit beeinflusst, die zumeist einen quer zu der Kontaktbrücke angeordneten und beweglichen Schaltstößel sowie eine durch diesen Schaltstößel bedienbare Federanordnung umfasst. Die Federanordnung ist weiterhin mit der Kontaktbrücke direkt verbunden. Verschiedene Federanordnungen sind hier bereits umgesetzt, wobei sich insbesondere eine bistabile Federanordnung mit zwei Federarmen als besonders geeignet herausgestellt hat. Denn durch eine passende Gestaltung und Anordnung der Federarme dieser bistabilen Federanordnungen ist ein kurzzeitiges Umschalten, bei Überschreiten eines bestimmten Umschaltpunktes, von einer ersten in eine zweite Schaltstellung realisierbar, wobei in der ersten Schaltstellung ein erstes Kontaktpaar und in der zweiten Schaltstellung ein zweites Kontaktpaar über die Kontaktbrücke miteinander verbunden ist.Numerous electrical snap-action switches are known from the prior art, in which mutually separate contact pairs can be connected to each other in one of two switching positions via a contact bridge. The position of the contact bridge is influenced by an actuating unit, which usually comprises a transversely arranged to the contact bridge and movable switching plunger and operable by this switch plunger spring assembly. The spring arrangement is further connected directly to the contact bridge. Various spring arrangements have already been implemented here, wherein in particular a bistable spring arrangement with two spring arms has been found to be particularly suitable. Because a suitable design and arrangement of the spring arms of these bistable spring arrangements is a short-term switching, when a certain switching point, from a first to a second switching position realized, wherein in the first switching position, a first pair of contacts and in the second switching position, a second pair of contacts on the Contact bridge is connected to each other.
Da es bei derartigen Schnappschaltern aufgrund thermischer Überbelastung der Kontaktbereiche zu einem unerwünschten Verschweißen der Kontaktbrücke mit den Kontakten der Kontaktpaare kommen kann, sind in einigen Anwendungsfällen weiterhin Hebelelemente für eine Zwangsöffnung vorgesehen. Diese Hebelelemente sind meist über den Schaltstößel schwenkbar sowie mit einem Ende an der Kontaktbrücke anlegbar und führen bei ausreichender Krafteinleitung am Schaltstößel zu einem Abdrücken der Kontaktbrücke von den Kontakten und somit zu einem zwanghaften Öffnen der Schaltstellung. Um eine der Schaltstellungen als Ruhestellung auszuführen, kann ein zusätzliches Federelement in dem Schnappschalter derart integriert sein, dass die Lage der Kontaktbrücke in dieser Ruhestellung durch die Kraftwirkung dieses Federelementes stabilisiert wird.Since it can come in such snap-switches due to thermal overloading of the contact areas to an undesirable welding of the contact bridge with the contacts of the contact pairs, lever elements are still provided for a positive opening in some applications. These lever elements are usually pivotable on the switch plunger and can be applied with one end to the contact bridge and lead with sufficient force on the switch plunger to a pressure of the contact bridge of the contacts and thus to a compulsive opening the switch position. To perform one of the switching positions as a rest position, an additional spring element in the snap-action switch can be integrated such that the position of the contact bridge is stabilized in this rest position by the force of this spring element.
Die oben aufgeführten, elektrischen Schnappschalter haben jedoch den Nachteil, dass bei Bruch eines Federarmes miteinander verbundene Kontaktpaare nicht sicher voneinander beabstandet werden können, um somit die jeweiligen Schaltstellungen zu vermeiden. Es sind daher elektrische Schnappschalter aus der Praxis bekannt, bei denen eine bestimmte Endlage der Kontaktbrücke bei einem Federbruch herbeigeführt werden soll, in der weder die Kontaktpaare der ersten noch der zweiten Schaltstellung miteinander verbunden sind.However, the electrical snap-action switches listed above have the disadvantage that, when a spring arm breaks, mutually connected pairs of contacts can not be reliably separated from one another so as to avoid the respective switching positions. There are therefore known electrical snap-action switch in practice, in which a certain end position of the contact bridge is to be brought about in a spring break, in which neither the contact pairs of the first nor the second switching position are connected to each other.
So offenbart die
Ein Nachteil des in der
Es ist daher die Aufgabe der vorliegenden Erfindung, einen elektrischen Schnappschalter derart zu gestalten, dass eine erste und/oder eine zweite Schaltstellung vermeidende Zwangsöffnung auch bei dynamischen Bewegungen des Schnappschalters gewährleistet ist.It is therefore an object of the present invention to design an electrical snap-action switch such that a first and / or a second switching position avoiding positive opening is ensured even with dynamic movements of the snap-action switch.
Diese Aufgabe wird dadurch gelöst, dass im Verschiebeweg der Kontaktbrücke eine Gleitrampe vorgesehen ist, die bei Bruch eines Federarmes mindestens einen Kontakt der Kontaktbrücke in der Verschiebeendlage von dem zugehörigen Kontakt des jeweiligen Kontaktpaares beabstandet.This object is achieved in that a sliding ramp is provided in the displacement of the contact bridge, which spaced at break a spring arm at least one contact of the contact bridge in Verschiebeendlage of the associated contact of the respective contact pair.
Auf diese Weise ist es möglich, dass unmittelbar nach Bruch eines Federarmes und dem daraus resultierenden Verschieben der Kontaktbrücke sowohl die erste als auch die zweite Schaltstellung des Schnappschalters vermieden wird. Bei dem Abgleiten auf der im Verschiebeweg der Kontaktbrücke angeordneten Gleitrampe wird die Kontaktbrücke von dem Kontaktpaar der ersten und/oder zweiten Schaltstellung beabstandet. Zudem wirkt der unbeschädigte Federarm derart auf die Kontaktbrücke ein, dass eine Zwangsöffnung des Schnappschalters auch bei von außen auf den Schnappschalter einwirkenden, insbesondere dynamischen Kräften gewährleistet ist.In this way, it is possible that immediately after breakage of a spring arm and the resulting displacement of the contact bridge, both the first and the second switching position of the snap-action switch is avoided. When sliding on the slide arranged in the displacement of the contact bridge the contact bridge is spaced from the contact pair of the first and / or second switching position. In addition, the undamaged spring arm acts on the contact bridge in such a way that a positive opening of the snap-action switch is ensured even in the case of externally acting on the snap-action switch, in particular dynamic forces.
Vorteilhafte Ausführungsformen sind in den Unteransprüchen beansprucht und nachfolgend erläutert.Advantageous embodiments are claimed in the subclaims and explained below.
Von Vorteil ist es weiterhin, dass die Gleitrampen an der Kontaktbrücke beidseitig des Schaltstößels angeordnet sind. Durch die Anordnung der Gleitrampen an der Kontaktbrücke ist eine einfache Gestaltung der Gleitrampen umsetzbar. Zudem wird durch eine beidseitige Verteilung der Gleitrampen zum Schaltstößel gewährleistet, dass die Kontaktbrücke unabhängig von der quer zum Schaltstößel gerichteten Verschieberichtung der Kontaktbrücke von den jeweiligen Kontaktpaaren beabstandet ist.It is also advantageous that the slide ramps are arranged on the contact bridge on both sides of the switch plunger. The arrangement of the slide ramps on the contact bridge a simple design of the slide ramps can be implemented. In addition, it is ensured by a two-sided distribution of the slide ramps to the switch plunger, that the contact bridge is spaced apart from the respective contact pairs, regardless of the transverse direction of the switch plunger displacement direction of the contact bridge.
In einer weiteren Ausgestaltungsform ist es von Vorteil, dass die Kontaktbrücke zwei im Wesentlichen parallel zueinander verlaufende Kontaktträger umfasst, die über zumindest zwei elektrisch isolierende Distanzstücke beabstandet und verbunden sind, wobei die Distanzstücke auf beiden Seiten des Schaltstößels angeordnet sind und die Gleitrampen durch über die Kontaktträger hinausragende Enden der Distanzstücke gebildet sind. Bei einer derartigen Gestaltung der Gleitrampen wird der Herstellaufwand für die Gleitrampen weiter verringert. Außerdem ist jeder Kontakt der Kontaktpaare durch eine separate Gleitrampe von der Kontaktbrücke beabstandbar.In a further embodiment, it is advantageous that the contact bridge comprises two substantially mutually parallel contact carrier, which are spaced and connected via at least two electrically insulating spacers, wherein the spacers are arranged on both sides of the switch plunger and the slide ramps through the contact carrier protruding ends of the spacers are formed. With such a design of the slide ramps, the manufacturing effort for the slide ramps is further reduced. In addition, each contact of the contact pairs is spaced by a separate sliding ramp of the contact bridge.
Positiv ist es, wenn die Gleitrampen aus elektrisch isolierendem Material bestehen, da somit ein unerwünschter Stromübergang zwischen den Kontaktpaaren der verschiedenen Schaltstellungen vermieden wird.It is positive if the slide ramps consist of electrically insulating material, since thus an undesirable current transition between the contact pairs of the different switch positions is avoided.
Sind die Gleitrampen im Wesentlichen keilförmig ausgestaltet, wird der Abstand zwischen der Kontaktbrücke und dem jeweiligen Kontaktpaar bei einem Verschieben der Kontaktbrücke quer zur Bewegungsrichtung des Schaltstößels mit zunehmenden Verschiebeweg konstant verändert. Dadurch sind ruckartige Bewegungen der Kontaktbrücke während des Verschiebens vermeidbar und eine gleichmäßige Führung der Kontaktbrücke in die Verschiebeendlage gewährleistet.If the slide ramps have a substantially wedge-shaped configuration, the distance between the contact bridge and the respective contact pair is constantly changed with increasing displacement when the contact bridge is displaced transversely to the direction of movement of the switch plunger. As a result, jerky movements of the contact bridge during the Movable avoidable and ensures a uniform guidance of the contact bridge in the Verschiebeendlage.
Vorteilhafterweise sind die Kontakte der Kontaktpaare mit einer der jeweiligen Gleitrampe zugewandten Auflaufschräge ausführbar. Demnach wird die Gefahr eines Verkeilens der Kontaktbrücke oder des dieser Kontaktbrücke zugeordneten Gleitrampe mit dem jeweiligen Kontakt des Kontaktpaares minimiert.Advantageously, the contacts of the contact pairs with a respective sliding ramp facing ramp are executable. Accordingly, the risk of wedging the contact bridge or the sliding bridge associated with this contact bridge is minimized with the respective contact of the contact pair.
Wenn die Auflaufschrägen weiterhin gekrümmt verlaufen, kann die Auflaufschräge auf einfache Weise in Folge einer Biegebearbeitung des jeweiligen Kontaktes umgesetzt werden.If the ramps continue to be curved, the ramp can be implemented in a simple manner as a result of a bending operation of the respective contact.
In einer vorteilhaften Ausgestaltung ist es denkbar, dass die Kontakte der Kontaktpaare mit je zwei im Wesentlichen v-förmig aufeinander zulaufenden Kontaktflanken ausgeführt sind, wobei an die Kontaktflanken jeweils eine horizontale Auflagefläche anschließt, an welcher die entsprechende Gleitrampe in einer Verschiebeendlage flächig aufliegt. Durch diese flächige Auflage kann ein Verkippen der Kontaktbrücke unter dynamischem Einsatz des Schnappschalters vermieden werden.In an advantageous embodiment, it is conceivable that the contacts of the contact pairs are each designed with two substantially V-shaped mutually tapered contact edges, wherein the contact flanks each followed by a horizontal bearing surface on which the corresponding slide ramp rests flat in a Verschiebeendlage. By this flat support tilting of the contact bridge can be avoided with dynamic use of the snap switch.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispieles mithilfe von Figuren in einer Zeichnung näher erläutert.The invention will be explained in more detail using an exemplary embodiment with reference to figures in a drawing.
Es zeigen:
- Fig. 1
- einen Querschnitt durch einen erfindungsgemäßen Schnappschalter in einer als Ruhestellung ausgeführten ersten Schaltstellung,
- Fig. 2
- den Schnappschalter aus
Fig. 1 unmittelbar nach Bruch eines der Federarme und - Fig. 3
- eine Detailansicht eines in der Ebene III-III von
Fig. 2 geführten Schnittes.
- Fig. 1
- a cross section through a snap-action switch according to the invention in a first switching position designed as a rest position,
- Fig. 2
- the snap-action switch off
Fig. 1 immediately after breakage of one of the spring arms and - Fig. 3
- a detail view of one in the level III-III of
Fig. 2 guided cut.
Die Figuren sind lediglich schematischer Natur und dienen nur dem Verständnis der Erfindung. Die gleichen Elemente werden mit denselben Bezugszeichen versehen.The figures are merely schematic in nature and are only for the understanding of the invention. The same elements are given the same reference numerals.
Der in den
Etwa in der Mitte des Schaltstößels 2 sind zwei sich gegenüberliegende Kerben am Schaltstößel 2 angebracht, wobei jede dieser Kerben zur Aufnahme eines der Enden zweier beidseitig des Schaltstößels 2 angeordneten Schnappfedern 7 dient. Die beiden Schnappfedern 7 sind als zwei im Wesentlichen omegaförmige Federarme ausgeführt und im Wesentlichen symmetrisch zur Bewegungsrichtung des Schaltstößels 2 angeordnet.Approximately in the middle of the switch plunger 2, two opposing notches on the switch plunger 2 are mounted, each of these notches for receiving one of the ends of two arranged on both sides of the switch plunger 2
Die anderen Enden der Schnappfedern 7 stützen sich wiederum jeweils in einer Kerbe eines Distanzstückes 8 ab. Die beiden, ebenfalls beidseitig des Schaltstößels 2 angeordneten Distanzstücke 8 bilden zusammen mit zwei Kontaktträgern 9 eine Kontaktbrücke 10. Neben dem Verbinden der Kontaktbrücke 10 mit den Schnappfedern 7, dienen die Distanzstücke 8 zur Aufnahme der beiden, im Wesentlichen parallel zueinander verlaufenden Kontaktträger 9. Die jeweiligen über die Kontaktträger 9 hinausragenden Enden der Distanzstücke 8 sind jeweils als Gleitrampen 11 ausgebildet, wobei die Gleitrampen 11 eine im Wesentlichen keilförmig verlaufende Flanke und einen im Wesentlichen horizontal verlaufenden Auflagebereich umfasst.The other ends of the
In der in
Im Weiteren sind am Gehäuse 3, den Stirnflächen der Kontaktträger 9 gegenüberliegende Verschiebebegrenzungen 17 vorgesehen, die den quer zur Bewegungsrichtung des Schaltstößels 2 verlaufenden Verschiebeweg der Kontaktbrücke 10 begrenzen.Furthermore, on the housing 3, the end faces of the
Funktionsgemäß ist die die Schnappfedern 7 umfassende Federanordnung so ausgerichtet, dass bei einem Verschieben des Schaltstößels 2 quer zur Kontaktbrücke 10 ein Umschnappen der Kontaktbrücke 10 bei Überschreiten eines Umschnapppunktes erfolgt. Für ein Schalten der zweiten Schaltstellung wird der Schaltstößel 2 durch eine Betätigungskraft entgegen der Federkraft des Federelementes 6 bewegt, während sich gleichzeitig die Lage der Schnappfedern 7 verändert. Bei Erreichen des durch die Konstruktion der Schnappfedern 7 vorgegebenen Umschnapppunktes, schnappt die Kontaktbrücke 10 in eine zweite Schaltstellung um, wobei in dieser zweiten Schaltstellung ein zweites Kontaktpaar 13 über einen Kontaktträger 9 verbunden ist und wobei der andere Kontaktträger 9 von dem ersten Kontaktpaar 12 beabstandet ist. Wird die von außen auf den Schaltstößel 2 aufgebrachte Betätigungskraft im Anschluss unterbrochen, wird der Schaltstößel 2 aufgrund der Kraftwirkung der Schnappfedern 7 erneut nach oben verschoben, wodurch schließlich die Kontaktbrücke 10 zurück in die erste Schaltstellung umschnappt.Functionally, the snap springs 7 comprehensive spring arrangement is aligned so that when moving the switch plunger 2 transversely to the
Die Detailansicht der
Claims (8)
- Electrical snap-action switch (1), comprising a contact bridge (10) which can be actuated by a switching plunger (2) and a bistable spring arrangement and which is connectable in a first switch position to at least one first contact pair (12) and in a second switch position to at least one second contact pair (13), wherein the spring arrangement has at least one spring arm on both sides of the switching plunger (2), by means of which, in addition, the contact bridge (10) is movable transversely with respect to the movement direction of the switching plunger (2) up to a movement end position in the event of breakage of one of the spring arms, characterized in that a sliding ramp (11) is provided in the movement path of the contact bridge (10), which sliding ramp (11) spaces apart at least one contact of the contact bridge (10) in the movement end position from the associated contact of the respective contact pair (12, 13) in the event of breakage of one spring arm.
- Electrical snap-action switch (1) according to claim 1, characterized in that the sliding ramps (11) on the contact bridge (10) are arranged on both sides of the switching plunger (2).
- Electrical snap-action switch (1) according to one of the preceding claims, characterized in that the contact bridge (10) comprises two contact carriers (9) which run substantially parallel towards each other and which are spaced apart and connected by at least two electrically insulating spacers (8), wherein the spacers (8) are arranged on both sides of the switching plunger (2) and the sliding ramps (11) are formed by ends of the spacers (8) protruding over the contact carriers (9).
- Electrical snap-action switch (1) according to one of the preceding claims, characterized in that the sliding ramps (11) are made of an electrically insulating material.
- Electrical snap-action switch (1) according to one of the preceding claims, characterized in that the sliding ramps (11) are substantially wedge-shaped.
- Electrical snap-action switch (1) according to one of the preceding claims, characterized in that the contacts of the contact pairs (12 and 13) can be realized with a slope which faces the respective sliding ramp (11).
- Electrical snap-action switch (1) according to claim 6, characterized in that the slopes have a curvature.
- Electrical snap-action switch (1) according to one of the preceding claims, characterized in that the contacts of the contact pairs (12 and 13) are each realized with two contact flanks (15) running towards each other substantially v-shaped, wherein the contact flanks (15) are each joined by a horizontal supporting surface on which the corresponding sliding ramp (11) lies face to face in a movement end position.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011014294A DE102011014294B3 (en) | 2011-03-17 | 2011-03-17 | Electric snap-action switch |
PCT/EP2012/000381 WO2012123052A1 (en) | 2011-03-17 | 2012-01-27 | Electrical snap-action switch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2556522A1 EP2556522A1 (en) | 2013-02-13 |
EP2556522B1 true EP2556522B1 (en) | 2013-09-11 |
Family
ID=45562273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12702186.3A Active EP2556522B1 (en) | 2011-03-17 | 2012-01-27 | Electrical snap-action switch |
Country Status (8)
Country | Link |
---|---|
US (1) | US9236201B2 (en) |
EP (1) | EP2556522B1 (en) |
CN (1) | CN103503102B (en) |
BR (1) | BR112013009187B1 (en) |
DE (1) | DE102011014294B3 (en) |
RU (1) | RU2533191C2 (en) |
WO (1) | WO2012123052A1 (en) |
ZA (1) | ZA201300568B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8653913B2 (en) * | 2012-05-31 | 2014-02-18 | Te Connectivity India Private Limited | Fully rated contact system having normally open contact and normally closed contacts |
DE102015212818A1 (en) * | 2015-07-08 | 2017-01-12 | Te Connectivity Germany Gmbh | Contact bridge arrangement for an electrical switching element |
CN109935478B (en) * | 2019-01-04 | 2023-10-24 | 厦门宏发汽车电子有限公司 | Mechanical switch with contact isolation safety |
DE102021105359A1 (en) | 2021-03-05 | 2022-09-08 | Bauch Engineering Gmbh & Co. Kg | Switches, in particular snap-action switches |
DE102022119929A1 (en) | 2022-08-08 | 2024-02-08 | Schaltbau Gmbh | Snap switch |
WO2024078744A1 (en) * | 2022-10-14 | 2024-04-18 | Eaton Intelligent Power Limited | Slider device for use in a switching mechanism |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH580862A5 (en) * | 1973-08-16 | 1976-10-15 | Sodeco Compteurs De Geneve | |
US3973094A (en) * | 1975-04-28 | 1976-08-03 | Allen-Bradley Company | Two-stage snap-action switch |
FR2332605A1 (en) * | 1975-11-24 | 1977-06-17 | Telemecanique Electrique | SNAP-OFF ELECTRIC SWITCH |
DE2618312A1 (en) * | 1976-04-27 | 1977-11-17 | Kissling Gmbh | Snap action changeover switch - has moving contact bridge and spring loaded lower fixed contacts designed to ensure contact separation on operation |
RU2052853C1 (en) * | 1992-05-06 | 1996-01-20 | Организация арендаторов Орловского производственного объединения "Промприбор" | Pressure relay |
CN2259680Y (en) * | 1995-06-30 | 1997-08-13 | 李庆尧 | Snap-action stroke switch |
DE29614028U1 (en) * | 1996-08-13 | 1997-12-11 | Schaltbau AG, 81677 München | Snap switch with housing |
CN2354225Y (en) * | 1998-12-28 | 1999-12-15 | 西安沙尔特宝电气有限公司 | Quick-action switch with forced cut-off function |
US6518528B2 (en) * | 2001-04-11 | 2003-02-11 | Rockwell Automation Technologies, Inc. | Limit switch with direct opening action |
RU2242817C1 (en) * | 2003-04-14 | 2004-12-20 | Закрытое акционерное общество "ОРЛЭКС" | Snap switch |
CN2631022Y (en) * | 2003-07-01 | 2004-08-04 | 陈国梁 | Electronic speed control switch for single-phase electric tool |
-
2011
- 2011-03-17 DE DE102011014294A patent/DE102011014294B3/en not_active Expired - Fee Related
-
2012
- 2012-01-27 US US14/005,819 patent/US9236201B2/en active Active
- 2012-01-27 WO PCT/EP2012/000381 patent/WO2012123052A1/en active Application Filing
- 2012-01-27 CN CN201280013481.9A patent/CN103503102B/en active Active
- 2012-01-27 EP EP12702186.3A patent/EP2556522B1/en active Active
- 2012-01-27 RU RU2013102121/07A patent/RU2533191C2/en active
- 2012-01-27 BR BR112013009187-8A patent/BR112013009187B1/en active IP Right Grant
-
2013
- 2013-01-22 ZA ZA2013/00568A patent/ZA201300568B/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN103503102A (en) | 2014-01-08 |
BR112013009187A2 (en) | 2016-07-26 |
RU2533191C2 (en) | 2014-11-20 |
BR112013009187B1 (en) | 2020-12-22 |
US20140001020A1 (en) | 2014-01-02 |
US9236201B2 (en) | 2016-01-12 |
ZA201300568B (en) | 2014-03-26 |
DE102011014294B3 (en) | 2012-03-29 |
WO2012123052A1 (en) | 2012-09-20 |
CN103503102B (en) | 2016-01-20 |
EP2556522A1 (en) | 2013-02-13 |
RU2013102121A (en) | 2014-07-27 |
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