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EP2874171B1 - Temperature-dependent switching device - Google Patents

Temperature-dependent switching device Download PDF

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Publication number
EP2874171B1
EP2874171B1 EP14187984.1A EP14187984A EP2874171B1 EP 2874171 B1 EP2874171 B1 EP 2874171B1 EP 14187984 A EP14187984 A EP 14187984A EP 2874171 B1 EP2874171 B1 EP 2874171B1
Authority
EP
European Patent Office
Prior art keywords
switching mechanism
mechanism according
temperature
snap
action disc
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
EP14187984.1A
Other languages
German (de)
French (fr)
Other versions
EP2874171A1 (en
Inventor
René Neumann
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.)
Thermik Geraetebau GmbH
Original Assignee
Thermik Geraetebau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thermik Geraetebau GmbH filed Critical Thermik Geraetebau GmbH
Publication of EP2874171A1 publication Critical patent/EP2874171A1/en
Application granted granted Critical
Publication of EP2874171B1 publication Critical patent/EP2874171B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/32Thermally-sensitive members
    • H01H37/52Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5427Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/32Thermally-sensitive members
    • H01H37/52Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/32Thermally-sensitive members
    • H01H37/52Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H2037/5445Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting with measures for avoiding slow break of contacts during the creep phase of the snap bimetal
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/32Thermally-sensitive members
    • H01H37/52Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H2037/5454Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting with separate spring biasing the bimetal snap element against the heat transfer surface
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/02Details
    • H01H37/32Thermally-sensitive members
    • H01H37/52Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H2037/5463Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting the bimetallic snap element forming part of switched circuit

Definitions

  • the present invention relates to a temperature-dependent switching mechanism with a bimetallic snap disk and a movable contact member and preferably a spring snap-action disc.
  • Such a temperature-dependent switching mechanism and a temperature-dependent switch equipped therewith are, for example, from the DE 43 45 350 A1 known.
  • the known temperature-dependent switch comprises a housing with a metallic lower part and a metallic cover part.
  • a temperature-dependent switching mechanism is housed, which produces an electrically conductive connection between the lower part and the cover part of the housing as a function of its temperature.
  • the rear derailleur is equipped with a spring snap-action disc and a bimetal snap-action disc.
  • the spring snap-action disc carries as a contact member a so-called movable contact part, which is pressed by the spring washer against a stationary counter contact inside of the cover part, which has a first contact surface forms. With its edge, the spring snap-action disc is supported on a second contact surface in the lower part of the housing, so that the electric current flows from the lower part through the spring snap-action disc and the movable contact part into the stationary counter-contact and from there into the cover part.
  • the lower part of the housing is pot-shaped, it has on its inner side a circumferential shoulder on which rests the spring snap-action disc of the temperature-dependent switching mechanism.
  • the spring snap disc carries a centrally welded contact part over which the bimetallic snap disk is slipped, so that it rests loosely on the spring snap disk.
  • the cover part of the housing rests on another circumferential shoulder of the lower part. Because the lower part and the cover part of the housing are made of electrically conductive material, an insulating film is arranged between them, the lower part and the cover part of the housing electrically insulated from each other.
  • the outer side of the cover part of the housing serves as a first external connection, where a first stranded wire is soldered.
  • the outer side of the lower part serves as a second outer terminal, where a terminal lug is attached, to which a second pigtail is soldered.
  • the known temperature-dependent switch is used to protect electrical equipment from overheating.
  • it is mounted on the device to be protected so that it is in thermal contact with the device.
  • the power supply circuit of the device is routed through the temperature-dependent switch by connecting a device connection cable to one of the external connections of the switch and the other external connection of the switch to the power supply for the device.
  • the temperature-dependent switch always assumes the temperature of the electrical device to be protected. If the temperature of the device now rises above a predetermined response temperature, the bimetallic snap-action disc jumps into its high-temperature position, in which it opens the switch, so that the supply circuit of the device is interrupted, which consequently can not heat up further.
  • the bimetallic snap-action disc is mounted mechanically force-free below its transition temperature, wherein the bimetallic snap disk is not used to conduct the operating current of the device to be protected.
  • the bimetallic snap discs have a long mechanical life, and that the switching point, so the transition temperature of the bimetallic snap disk, not changed even after many switching cycles.
  • the temperature-dependent switching mechanism may also comprise only a bimetallic snap-action disk which carries the movable contact part and thus carries the operating current.
  • a current transfer element in the form of a contact bridge or a contact plate is frequently used as the contact element, which is moved by a spring part, that is to say a spring snap-action disc and / or a bimetallic snap-action disc and carries two contact parts. which cooperate with two stationary mating contacts, which are electrically connected to the external terminals of the switch.
  • the operating current of the device to be protected flows from the first mating contact via the first contact part into the contact plate, through it to the second contact part and from this into the second mating contact.
  • the spring part is thus de-energized.
  • the temperature-dependent switching mechanism has a bimetallic snap-action disc and a spring snap-action disc, both of which are held captive on a movable contact part.
  • the bimetallic snap disk lies with its edge between a shoulder on an annular insulating ring and a cover of the housing.
  • Below the bimetallic snap disk is the spring snap disk, which is arranged with its edge loose between a lying on the inner bottom of the housing base contact ring and an electrically conductive spacer ring. The relative position of bimetallic snap disk and spring snap disk to each other can also be reversed.
  • the temperature-dependent switching mechanism has a bimetal snap-action disc and a spring snap-action disc, both of which are captively held on a contact plate which cooperates with two stationary mating contacts on the inside of the housing cover.
  • the arranged above the bimetallic snap disk spring snap-action disc is guided with its edge between an inner shoulder of the housing base and a ring arranged between the shoulder and the housing cover.
  • WO2010 / 139781 discloses a temperature-dependent switching mechanism according to the preamble of claim 1.
  • the present invention has the object, the known switching mechanism in such a way that simplifies the assembly of the thus equipped temperature-dependent switch, in particular, the switch itself can be constructed mechanically simpler and cheaper.
  • the switching mechanism has an annular frame in which the bimetallic snap disk and possibly provided spring snap-action disc are held captive.
  • a temperature-dependent switching mechanism can be constructed, as it were, like a pushbutton, ie with an annular frame in which the bimetallic snap disk or both snap disks are held captive, which preferably takes place over their edges in order to snap it over to allow the domes in their respective centers.
  • the or each snap-action disc is captively arranged in the annular frame, so that the switching mechanism can be pre-produced and tested without the complete assembly of a temperature-dependent switch itself is required.
  • the or each snap-action disc is mechanically protected from damage, so that the completed and tested new derailleur can be stored as bulk material, which is the prerequisite for a subsequent automatic assembly of equipped with the new rear derailleur switch.
  • the lower parts of a temperature-dependent switch equipped therewith can be made simpler, rotating parts, for example made of brass, are no longer necessary.
  • the lower part of a temperature-dependent switch which is designed with the new rear derailleur, therefore, an inexpensive deep-drawn part made of steel.
  • the mechanical protection of the or each snap-action by the annular frame also provides more freedom in shaping the housing of the equipped with the new rear derailleur temperature-dependent switch, since the snap discs are no longer aligned in the housing but with the annular frame and support.
  • the new rear derailleur can be inserted into a two-part housing as well as into a one-piece, so-called slide-in housing.
  • the new derailleur has only a bimetallic snap disk, which produces both the closing pressure and the operating current leads, it is particularly preferred if the new derailleur has a bimetallic snap disk and a spring snap disk, said both snap disc are arranged one above the other.
  • the annular frame does not necessarily have to be circular, it may also be oval, rectangular, square or oblong rounded. Corresponding shapes then also has the or each snap disc. This is particularly advantageous if the new rear derailleur is to be used in a plug-in housing.
  • the annular frame and the one or both snap-action disks are preferably of circular design.
  • the movable contact member may be either a contact bridge, on which two contact parts are arranged, which are electrically connected to each other via the contact bridge and each interact with a stationary counter contact, or a contact part, which cooperates with a stationary counter-contact, wherein the operating current then via a Snap disk flows.
  • the contact member may further be both a separate component, as well as be formed on the bimetal schnapps slice and / or the spring snap-action disc itself.
  • the annular frame can also compensate for height and curvature tolerances in the snap discs, so that no further action must be taken.
  • the frame can be designed so that its installation height can be readjusted by suitable deformation of the edge of the frame to compensate for installation tolerances.
  • the annular frame has an upper annular surface, and preferably has a lower annular surface, wherein more preferably the upper and lower annular surfaces are arranged parallel to each other and connected by a transverse to the annular surfaces, circumferential cylindrical surface.
  • the upper and / or lower annular surface and possibly the cylindrical surface can be made a contacting of the annular frame, so for example.
  • the electrical contact to a consisting of conductive material lower part or a test device.
  • a conical transition surface is arranged between the cylindrical surface and the lower annular surface.
  • This conical transition surface allows the insertion of the new rear derailleur in deep-drawn parts, in which the transition between the ground and the circumferential wall is not formed at right angles. So here is an advantage that structurally simple and inexpensive parts can be used for the equipped with the new rear derailleur switch.
  • the movable contact member is preferably formed as a movable contact part, which is arranged between the bimetallic snap disk and spring snap disk.
  • a snap-action disc is then firstly inserted into the annular frame, then the movable contact part is placed on the snap-action disc, and then the other snap-action disc is inserted into the frame, because the lower snap-action disc is already held in the frame during insertion of the movable contact part. makes the installation of the new rear derailleur very easy.
  • the snap-on disc can be kept simpler and more reliable than a loose snap-action disc, eliminating the risk that the snap-action disc will already be damaged during this assembly step.
  • the bimetallic snap disk is fixed captive with play on the movable contact member and preferably the spring snap disc is captively fixed to the movable contact member.
  • the three active components of the new switching mechanism so the bimetallic snap disk, the spring snap disc and the movable contact member need not be inserted sequentially in the annular frame, which is technically quite possible, but as a unit in the framework can be introduced. This facilitates the assembly of the new rear derailleur.
  • a lower circumferential shoulder is arranged in the frame, on which the bimetallic snap disk is supported at the transition in its low-temperature position with its edge, preferably inside the frame an upper circumferential shoulder is arranged, on which the spring snap-action disc is fixed over its edge.
  • the two shoulders used for the switching function are arranged inside in the annular frame, so that neither the edge of the bimetallic snap disk nor the edge of the spring snap-action disc protrudes upwards or downwards over the frame, if the rear derailleur, for example is tested outside a switch and is exposed to both high and low temperatures.
  • the spring snap-action disc In the low-temperature position, the spring snap-action disc is supported by its edge on the upper circumferential shoulder and pushes the movable contact member upwards, ie in the assembled switch against the or each stationary contact part.
  • the bimetallic snap disk is in this closed position without force below the spring snap disk.
  • the bimetallic snap disk presses with its edge from below against the spring snap-action disc and thus opens the switch.
  • the bimetallic snap disk When switching back to the low temperature position, the bimetallic snap disk first snaps around, whereby it is now supported with its edge on the lower shoulder because of the further lying at the lower annular surface movable contact member while the center of the spring-snap disc and with this the movable contact member pushes upwards, whereby the spring snap-action disc is pressed back into its first geometrically stable position in which it holds the switch electrically closed.
  • top or “above” is understood to mean a direction from the bimetallic snap disk to the stationary contact member, with a direction “downward” or “below” from the spring snap disk to the bimetal below it Snapping disk is understood.
  • the bimetallic snap-action disc is below the spring snap-action disc.
  • the upper shoulder is arranged in an inner circumferential groove in the frame in which the spring snap-action disc is fixed with its edge, wherein preferably the edge of the spring snap-action disc is engaged in the groove or alternatively by a the laying of the edge of the spring snap disc on the upper shoulder embossed projection is fixed.
  • the three active components are inserted individually or as an interconnected, for example via the movable contact member unit in the annular frame and then coined a projection on the edge of the spring snap-action disc.
  • the derailleur has a flat, blechianos power transmission member which is connected to the contact member designed as a movable contact part, wherein the current transmitting member is preferably connected to the annular frame.
  • connection to the annular frame can on the one hand take place in that the current transfer member rests with its edge on the lower shoulder, that is arranged on the side of the bimetallic snap disk.
  • the current transmission member may also be on the side of the spring snap-action disc and be arranged with its edge in the circumferential groove.
  • the current transmitting member When the current transmitting member is connected to both the movable contact member and the annular frame, it provides a permanent electrical connection between the movable contact member and the annular frame, so it is connected in electrically conductive annular frame to the spring snap disc, so to speak electrically in parallel and allows a higher strength of the flowing operating current.
  • the current transmitting member is arranged with its edge above the upper annular surface or below the lower annular surface.
  • the edge of the current transmission member may be fastened on the upper or lower annular surface, for example by spot welding.
  • the power transmission member When mounting a equipped with the new rear derailleur temperature-dependent switch, the power transmission member is clamped with its edge between the lower ring surface and the bottom of the housing base or between the upper annular surface and the inside of the lid.
  • edge of the current transmitting member is not attached to the upper or lower ring surface, the electrical contacting of the edge of the current transmitting member takes place only during the assembly of the equipped with the new rear derailleur switch.
  • the annular frame comprises electrically conductive material or electrically insulating material.
  • the annular frame itself When the annular frame itself is electrically conductive, the operating current of the device to be protected flows through the frame itself and through the spring snap-action disc or the bimetallic snap-action disc, if the spring snap-action disc is dispensed with in a simple switch, and by the latter movable contact part.
  • the frame is made of electrically insulating material, then the current is transmitted through the current transmission member, which is contacted as described above, or through the contact member designed as a contact bridge with two contact parts.
  • the current transfer member can then represent a small series resistance, so that it provides as a heating resistor for a current-dependent switching function. This is particularly useful when the power transmission member lies with its edge below the lower ring surface, because it is then in the immediate vicinity of the bimetallic snap disk, which is then effectively heated by the developed ohmic heat.
  • the spring snap-action disc which ensures the contact pressure between the movable contact part and the stationary mating contact when the switch is closed, is not heated up so much, which increases its service life.
  • the operating current flows through the movable contact part and the current transfer member, the spring snap-action disc is always de-energized, which also increases their life.
  • the annular frame comprises electrical resistance material, preferably at least one resistance layer.
  • the frame itself may, for example. From PTC material or other suitable material, where it depends on the interconnection and arrangement can serve as a self-holding resistor and / or as a series resistor for current-dependent switching.
  • a frame of resistance material can serve as a self-holding resistor.
  • annular frame with a resistance layer which is arranged on the upper annular surface, the lower annular surface and / or the cylindrical outer wall and serves as a self-holding resistor or series resistance for current-dependent switching.
  • the current transmission element can also be designed with a corresponding resistance value, so that it provides for current-dependent switching.
  • the rear derailleur can also serve to stabilize the housing, wherein the switching mechanism can also be used directly in a receiving opening in a device, as this in principle from the DE 195 06 342 C1 is known.
  • the present invention also relates to a temperature-dependent switch with a pot-like lower part, which is closed by a cover part, and with two external terminals, wherein in the switch, the new temperature-dependent switching mechanism is arranged, which, depending on its temperature, an electrically conductive connection between the two external connections manufactures.
  • the present invention relates to a temperature-dependent switch with a plug-in housing, on which two external connections are provided, wherein in the plug-in housing, the new temperature-dependent switching mechanism is used, which produces an electrically conductive connection between the two external connections as a function of its temperature.
  • Fig. 1 is designated by a temperature-dependent switching mechanism 10, which has a circular bimetallic snap disk 11 and arranged above the bimetallic snap disk 11 circular spring snap-action disc 12.
  • the bimetallic snap disk 11 and the spring snap disk 12 are arranged captive on a movable contact part 14.
  • the bimetallic snap disk 11 and the spring snap-action disc 12 are held captive in a likewise annular annular frame 15 which has an upper annular surface 16 and a lower annular surface 17 parallel thereto, which lies radially further inward than the upper annular surface 16 Ring surface 16 and the lower annular surface 17 are interconnected via a transverse to the annular surfaces 16, 17 extending cylindrical surface 18 and a conical transition surface 19 which extends inclined between the cylindrical surface 18 and the lower annular surface 17.
  • the movable contact member 14 projects upwardly above the upper annular surface 16, the lower annular surface 17 is downwardly over the movable Contact part 14 and in particular on the bimetallic snap disk 11 and the spring snap disk 12 before, so that when opening the rear derailleur 10, the movable contact member 14 does not project down over the lower annular surface 17, so that no special measures must be taken to a To prevent contact between the movable contact part 14 and an inner bottom of a switch equipped with the switch when the switch opens.
  • the bimetallic snap disk 11 rests with its edge 21 loosely on an inner, in the frame 15 encircling, annular lower shoulder 22.
  • the spring snap-action disc 12 lies with its edge 23 on an inner in the frame 15 annular circumferential, upper shoulder 24 which is formed in a groove 25 which is formed by the shoulder 24 and the edge 23 cross-projection 26.
  • the spring snap-action disc 12 is held captive in the groove 25 and thus in the frame 15 via its edge 23.
  • the spring snap-action disc sits captive but with play in a circumferential groove 28 which is arranged on the movable contact part 14.
  • the bimetallic snap-action disc 11 is held captive but with play.
  • the rear derailleur 10 can be tested before mounting in a switch and store as bulk material, because the edges 21, 23 of the snap discs 11, 12 are protected by the frame 15 and the spring snap-action disc 12 can be contacted via the frame 15.
  • the rear derailleur 10 may also have only one snap-action disc, namely the bimetal snap-action disc 11, which is then arranged in the frame 15, as it is in Fig. 1 for the spring snap-action disc 12 is shown.
  • the bimetallic snap disk 11 is then arranged with its edge 21 in the circumferential groove 25 and fixed so captive in the frame 15.
  • the bimetallic snap disk 11 then carries the movable contact part 14, on which it is arranged with its inner portion captive but with play in the circumferential groove 28.
  • FIG. 2 shown temperature-dependent rear derailleur 10 'is basically the same structure as the rear derailleur 10 Fig. 1 However, it is additionally provided with a sheet-like current transmission member 31 which is welded at its center 32 to the movable contact part 14.
  • the current transfer member 31 protrudes beyond the lower annular surface 17.
  • the edge 33 may be fixedly connected to the annular surface 17 by spot welding. Also, the rear derailleur 10 'can be tested before the shoring.
  • a temperature-dependent switch 35 is shown, which has a pot-like lower part 36 which is closed by a plate-like cover part 37.
  • the rear derailleur 10 ' is made Fig. 2 inserted so that the frame 15 with its cylindrical surface 18 inside in contact with a peripheral wall 38 of the lower part 36 and the peripheral wall 38 so stabilized.
  • the power transmission member 31 is clamped with its edge 33 between the lower annular surface 17 and an inner bottom 39 of the lower part 36.
  • the lower part 36 is a deep-drawn part, so that the transition between wall 38 and bottom 39 is not formed exactly, in particular not at right angles. Because the frame 15 has the conical transition surface 19, it can still be positioned exactly in the lower part 36.
  • an insulating film 41 which extends laterally between the cover member 37 and the wall 38 upwardly and is then pressed from above onto the cover member 37, to which the wall 38 was crimped at its upper edge 42 ,
  • the edge 42 presses on the cover part 37 and this on the insulating film 41 on the upper annular surface 16, whereby the frame 15 and thus the switching mechanism 10 'is fixedly mounted in the temperature-dependent switch 35 and at the same time the electrical contact between the inner bottom 39 of the lower part 36 and the edge 33 of the power transmission member 31 is made.
  • the annular frame 15 can be made here both of electrically conductive material and of electrically insulating material.
  • a stationary mating contact 44 is arranged, which in the in Fig. 3 shown closed state of the switch 35 is in contact with the movable contact part 14.
  • switching state is the bimetallic snap disk 11 forces in the rear derailleur 10 ', while the spring snap disk 12 is supported with its edge 23 in the groove 25 and the movable contact member 14 presses against the stationary counter contact 44. In this way, the electrical circuit between the stationary mating contact 44 and the existing here of electrically conductive material lower part 36 is closed, wherein the operating current of a device to be protected via the current transfer member 31 and possibly also via the spring snap disk 12 flows.
  • the switch 35 has two outer terminals, which are formed by the outer bottom 36 'of the lower part 36 and the outer surface 44' of the stationary mating contact 44. When switch 35 is closed, the two outer terminals 36 'and 44' are electrically conductively connected to one another.
  • annular frame 15 is made of an electrically insulating material, can be dispensed with the insert of the insulating film 41.
  • the operating current then flows when the switch 35 is closed only by the current transfer member 31, which heats up depending on their contact resistance.
  • the current transmitting member 31 is located on the side of the bimetallic snap disk 11, the evolving ohmic heat leads to rapid heating of the bimetallic snap disk 11, which ensures an accurate response of the switch 35 to an excessive operating current of a device to be protected.
  • the annular frame 15 consists of an electrically conductive material or is covered with a layer of an electrically conductive material, it represents a parallel resistor which is parallel to the switching mechanism 10 'both with the electrically conductive cover part 37 and with the electrically conductive lower part 36 is connected, although here is dispensed with the insert of the insulating film 41.
  • the self-holding resistor thus formed is short-circuited by the highly electrically conductive current transmitting member 31.
  • the switch 35 opens, the self-holding resistor formed by the annular frame 15 is now in series between the stationary mating contact 44 and the base 36, so that a residual current flows through the switch 35, which keeps the switching mechanism open until the power supply of is switched off to be protected electrical device.
  • the power transmission member 31 can provide as a heating resistor for a current-dependent switching.
  • the annular frame 15 may consist of electrically conductive material or, for example, on the cylindrical surface 18 or the lower annular surface 17 have an electrically conductive layer.
  • the frame 15 may be so covered with resistive material that it acts as a self-holding resistor.
  • the height of the frame 15 between the upper and lower annular surface 16, 17 may be chosen so that the movable contact member 14 does not come into contact with the bottom 39 when the switch 35 is open.
  • a current transfer member 31 which projects down over the lower annular surface 17, shows the Fig. 4 a plan view of the rear derailleur 10 Fig. 1 , which is now provided with a current transmitting member 45, which is connected on the one hand to the movable contact part 14 and on the other hand to the upper annular surface 16, under which it extends.
  • the current transfer member 45 could also extend over the upper annular surface 16, so that it would then be clamped in a switch 35 between the upper annular surface and the inner side 43 of the cover part 37.
  • the power transmission member 45 is permanently connected to both the movable contact member 14 and the frame 15, so that it serves not only the power transmission but also as an arc screen.
  • the current transmitting member 45 may also extend only to one side away from the movable contact member 14 so as to leave free a large area of the top of the spring snap-action disc.
  • Fig. 5 is an embodiment of the current transfer member 31 in a schematic plan view Fig. 2 shown.
  • the current transmitting member 31 is formed as a circular disc in which curved, spiral and radially outwardly extending slots 46, 47 are located. These slots 46, 47 reduce the spring action of the current transfer member 31, so that it does not counteract when switching the spring force of the bimetallic snap disk and the spring snap-action disc 12.
  • a plug-in housing 50 is shown with walls 51 of electrically insulating material which limit an insertion opening 52.
  • the rear derailleur 10 is made Fig. 1 inserted.
  • the frame 15 comes into contact with a bottom electrode 53 and the movable contact part 14 in abutment with a cover electrode 54th
  • Bottom electrode 53 and cover electrode 54 are formed on the inside of the walls 51 and connected in a manner not shown with external terminals 55 and 56, respectively.
  • the plug-in housing 50 can be used as a temperature-dependent switch, in which the switching mechanism 10 between the external terminals 56, 57 produces or opens an electrical connection depending on temperature.
  • the insertion housing 50 is part of a device to be protected, in which a pocket forms the insertion opening 52.
  • the external connections can then lead to windings or components between which the switching mechanism 10 establishes or opens a temperature-dependent electrical connection.
  • Fig. 7 is a schematic functional picture of the switch 35 Fig. 3 shown.
  • the switch 35 is closed, so that the operating current of the electrical appliance to be protected by the cover part 35 and the movable contact part 14, from this by the spring snap-action disc 12 and in parallel by the current transfer member 31, and then by the frame 15 and the lower part 36th flows.
  • the operating current flows only through the lid part 35 and the movable contact part 14, from the latter through the current transmitting member 31 and then through the lower part 36.
  • the insulating film 41 is replaced by a lying between the cover part 37 and frame 15 resistance layer 57.
  • the frame 15 is made of electrically conductive material.
  • the current flows as in the switch 35 Fig. 7 , However, if the switch 35 'is opened, a residual current flows through cover part 37, resistance layer 57, frame 15 and lower part 36. In the resistance layer 57, a sufficient ohmic heat develops, which prevents the bimetallic snap disk 11 from cooling below its return temperature. so that the switch 35 'remains open.
  • the frame 15 may also itself entirely or partially consist of resistance material in order to realize the self-holding function.
  • Fig. 9 the switch 35 is off Fig. 7 modified so that the power transmission member 31 is formed as a series resistor.
  • the frame 15 is electrically insulating, so that it is possible to dispense with the insulating film 41.
  • the operating current flows through cover part 37, movable contact member 14 and current transfer member 31 in the lower part 36.
  • the current transmission member 31 heated by the integrated series resistance at high current flow so far that the developed ohmic heat the switch 35 "already opens before the heat developed by the device to be protected heats it up to the point where it opens.
  • Fig. 10 the switch 35 is off Fig. 7 shown, but without Stromübertragungsglied 31.
  • the frame 15 is made of resistance material, so that it acts as a series resistor for current-dependent switching.
  • Fig. 11 is the switch 35 '"off Fig. 10 shown, wherein the frame 15 is electrically conductive here.
  • the insulating film 41 is as in the switch 35 'off Fig. 8 a resistance layer 57 is provided.
  • the frame 15 here as well may consist entirely or partially of resistance material in order to realize the self-holding function.
  • the switch 35 IV may still have a resistive layer 58 between the frame 15 and lower part 36, which provides series resistance for current-dependent switching, because he is 35 IV closed circuit in the circuit of the operating current and heats up at high current flow so far that the Switch 35 IV opens.
  • the resistance of the resistive layer 57 is much greater than that of the resistive layer 58.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)

Description

Die vorliegende Erfindung betrifft ein temperaturabhängiges Schaltwerk mit einer Bimetall-Schnappscheibe und einem beweglichen Kontaktglied sowie vorzugsweise einer Feder-Schnappscheibe.The present invention relates to a temperature-dependent switching mechanism with a bimetallic snap disk and a movable contact member and preferably a spring snap-action disc.

Ein derartiges temperaturabhängiges Schaltwerk sowie ein damit ausgestatteter temperaturabhängiger Schalter sind bspw. aus der DE 43 45 350 A1 bekannt.Such a temperature-dependent switching mechanism and a temperature-dependent switch equipped therewith are, for example, from the DE 43 45 350 A1 known.

Der bekannte temperaturabhängige Schalter umfasst ein Gehäuse mit einem metallischen Unterteil sowie einem metallischen Deckelteil. In dem Gehäuse ist ein temperaturabhängiges Schaltwerk untergebracht, das in Abhängigkeit von seiner Temperatur eine elektrisch leitende Verbindung zwischen dem Unterteil und dem Deckelteil des Gehäuses herstellt.The known temperature-dependent switch comprises a housing with a metallic lower part and a metallic cover part. In the housing, a temperature-dependent switching mechanism is housed, which produces an electrically conductive connection between the lower part and the cover part of the housing as a function of its temperature.

Das Schaltwerk ist mit einer Feder-Schnappscheibe und einer Bimetall-Schnappscheibe ausgestattet. Die Feder-Schnappscheibe trägt dabei als Kontaktglied ein so genanntes bewegliches Kontaktteil, das durch die Federscheibe gegen einen stationären Gegenkontakt innen an dem Deckelteil gedrückt wird, der eine erste Kontaktfläche bildet. Mit ihrem Rand stützt sich die Feder-Schnappscheibe auf einer zweiten Kontaktfläche im Unterteil des Gehäuses ab, so dass der elektrische Strom von dem Unterteil durch die Feder-Schnappscheibe und das bewegliche Kontaktteil in den stationären Gegenkontakt und von da in das Deckelteil fließt.The rear derailleur is equipped with a spring snap-action disc and a bimetal snap-action disc. The spring snap-action disc carries as a contact member a so-called movable contact part, which is pressed by the spring washer against a stationary counter contact inside of the cover part, which has a first contact surface forms. With its edge, the spring snap-action disc is supported on a second contact surface in the lower part of the housing, so that the electric current flows from the lower part through the spring snap-action disc and the movable contact part into the stationary counter-contact and from there into the cover part.

Das Unterteil des Gehäuses ist topfartig ausgestaltet, es weist an seiner Innenseite eine umlaufende Schulter auf, auf der die Feder-Schnappscheibe des temperaturabhängigen Schaltwerkes aufliegt.The lower part of the housing is pot-shaped, it has on its inner side a circumferential shoulder on which rests the spring snap-action disc of the temperature-dependent switching mechanism.

Die Feder-Schnappscheibe trägt zentrisch ein angeschweißtes Kontaktteil, über das die Bimetall-Schnappscheibe gestülpt ist, so dass diese lose auf der Feder-Schnappscheibe aufliegt.The spring snap disc carries a centrally welded contact part over which the bimetallic snap disk is slipped, so that it rests loosely on the spring snap disk.

Das Deckelteil des Gehäuses liegt auf einer weiteren umlaufenden Schulter des Unterteils auf. Weil Unterteil und Deckelteil des Gehäuses aus elektrisch leitfähigem Material gefertigt sind, ist zwischen ihnen eine Isolationsfolie angeordnet, die Unterteil und Deckelteil des Gehäuses elektrisch gegeneinander isoliert.The cover part of the housing rests on another circumferential shoulder of the lower part. Because the lower part and the cover part of the housing are made of electrically conductive material, an insulating film is arranged between them, the lower part and the cover part of the housing electrically insulated from each other.

Die Außenseite des Deckelteils des Gehäuses dient als erster Außenanschluss, dort ist eine erste Litze angelötet. Die Außenseite des Unterteils dient als zweiter Außenanschluss, dort ist eine Anschlussfahne befestigt, an die eine zweite Anschlusslitze angelötet ist.The outer side of the cover part of the housing serves as a first external connection, where a first stranded wire is soldered. The outer side of the lower part serves as a second outer terminal, where a terminal lug is attached, to which a second pigtail is soldered.

Der bekannte temperaturabhängige Schalter dient dazu, elektrische Geräte vor Überhitzung zu schützen. Zu diesem Zweck wird er so an dem zu schützenden Gerät montiert, dass er in thermischem Kontakt mit dem Gerät steht.The known temperature-dependent switch is used to protect electrical equipment from overheating. For this purpose, it is mounted on the device to be protected so that it is in thermal contact with the device.

Der Versorgungsstromkreis des Gerätes wird über den temperaturabhängigen Schalter geführt, indem ein Anschlusskabel des Gerätes mit einem der Außenanschlüsse des Schalters und der andere Außenanschluss des Schalters mit der Spannungsversorgung für das Gerät verbunden wird.The power supply circuit of the device is routed through the temperature-dependent switch by connecting a device connection cable to one of the external connections of the switch and the other external connection of the switch to the power supply for the device.

Wegen der thermischen Ankopplung nimmt der temperaturabhängige Schalter stets die Temperatur des zu schützenden elektrischen Gerätes an. Erhöht sich die Temperatur des Gerätes jetzt über eine vorgegebene Ansprechtemperatur hinaus, so springt die Bimetall-Schnappscheibe in ihre Hochtemperaturstellung, in der sie den Schalter öffnet, so dass der Versorgungsstromkreis des Gerätes unterbrochen wird, das sich folglich nicht weiter aufheizen kann.Because of the thermal coupling, the temperature-dependent switch always assumes the temperature of the electrical device to be protected. If the temperature of the device now rises above a predetermined response temperature, the bimetallic snap-action disc jumps into its high-temperature position, in which it opens the switch, so that the supply circuit of the device is interrupted, which consequently can not heat up further.

Bei dieser Konstruktion ist die Bimetall-Schnappscheibe unterhalb ihrer Sprungtemperatur mechanisch kräftefrei gelagert, wobei die Bimetall-Schnappscheibe auch nicht zur Leitung des Betriebsstromes des zu schützenden Gerätes eingesetzt wird.In this construction, the bimetallic snap-action disc is mounted mechanically force-free below its transition temperature, wherein the bimetallic snap disk is not used to conduct the operating current of the device to be protected.

Dabei ist von Vorteil, dass die Bimetall-Schnappscheiben eine lange mechanische Lebensdauer aufweisen, und dass sich der Schaltpunkt, also die Sprungtemperatur der Bimetall-Schnappscheibe, auch nach vielen Schaltspielen nicht verändert.It is advantageous that the bimetallic snap discs have a long mechanical life, and that the switching point, so the transition temperature of the bimetallic snap disk, not changed even after many switching cycles.

Darüber hinaus ist es bekannt, derartige Schalter mit einem Parallelwiderstand zu versehen, der parallel zu den Außenanschlüssen geschaltet ist. Dieser Parallelwiderstand übernimmt bei geöffnetem Schalter einen Teils des Betriebsstroms und hält den Schalter auf einer Temperatur oberhalb der Sprungtemperatur, so dass sich der Schalter nach dem Abkühlen nicht automatisch wieder schließt. Derartige Schalter nennt man selbsthaltend.Moreover, it is known to provide such switches with a parallel resistor which is connected in parallel with the external terminals. When the switch is open, this parallel resistor takes over part of the operating current and keeps the switch at a temperature above the transition temperature, so that the switch does not automatically close again after cooling down. Such switches are called self-holding.

Weiter ist es bekannt, derartige Schalter mit einem Reihenwiderstand auszustatten, der von dem durch den Schalter fließenden Betriebsstrom durchflossen wird. Auf diese Weise wird in dem Reihenwiderstand eine ohmsche Wärme erzeugt, die proportional zum Quadrat des fließenden Betriebsstroms ist. Übersteigt die Stromstärke ein zulässiges Maß, so führt die Wärme des Reihenwiderstandes dazu, dass das Schaltwerk geöffnet wird.It is also known to provide such switches with a series resistance, which is traversed by the current flowing through the switch operating current. In this way, an ohmic heat is generated in the series resistor, which is proportional to the square of the flowing operating current. If the current exceeds a permissible level, the heat of the series resistance causes the switching mechanism to open.

Auf diese Weise wird ein zu schützendes Gerät bereits dann von seinem Versorgungsstromkreis abgeschaltet, wenn ein zu hoher Stromfluss zu verzeichnen ist, der noch gar nicht zu einer übermäßigen Erhitzung des Gerätes geführt hat.In this way, a device to be protected is already switched off from its supply circuit when too high current flow is recorded, which has not yet led to excessive heating of the device.

Abweichend von der Ausführung des Schalters gemäß der DE 43 45 350 A1 kann das temperaturabhängige Schaltwerk auch lediglich eine Bimetall-Schnappscheibe umfassen, die das bewegliche Kontaktteil trägt und somit den Betriebsstrom führt.Notwithstanding the design of the switch according to DE 43 45 350 A1 The temperature-dependent switching mechanism may also comprise only a bimetallic snap-action disk which carries the movable contact part and thus carries the operating current.

Wenn der temperaturabhängige Schalter besonders hohe Ströme führen soll, so wird häufig als Kontaktglied ein Stromübertragungsglied in Form einer Kontaktbrücke oder eines Kontakttellers eingesetzt, das von einem Federteil, also einer Feder-Schnappscheibe und/oder einer Bimetall-Schnappscheibe bewegt wird und zwei Kontaktteile trägt, die mit zwei stationären Gegenkontakten zusammenwirken, die mit den Außenanschlüssen des Schalters elektrisch verbunden sind.If the temperature-dependent switch is to carry particularly high currents, a current transfer element in the form of a contact bridge or a contact plate is frequently used as the contact element, which is moved by a spring part, that is to say a spring snap-action disc and / or a bimetallic snap-action disc and carries two contact parts. which cooperate with two stationary mating contacts, which are electrically connected to the external terminals of the switch.

Auf diese Weise fließt der Betriebsstrom des zu schützenden Gerätes von dem ersten Gegenkontakt über das erste Kontaktteil in den Kontaktteller, durch diesen hindurch zum zweiten Kontaktteil und von diesem in den zweiten Gegenkontakt. Das Federteil ist somit stromlos.In this way, the operating current of the device to be protected flows from the first mating contact via the first contact part into the contact plate, through it to the second contact part and from this into the second mating contact. The spring part is thus de-energized.

Es ist auch bekannt, an dem Federteil selbst, also beispielsweise der Bimetall-Schnappscheibe oder einer gegen ein Bimetallteil arbeitende Federschnappscheibe eine Kontaktbrücke auszubilden, die also kein gesondertes Bauteil ist. Dann fließt der Betriebsstrom durch die so ausgestattete Feder-Schnappscheibe.It is also known to form a contact bridge on the spring part itself, so for example, the bimetallic snap disk or working against a bimetal Federschnappscheibe, which is therefore not a separate component. Then the operating current flows through the so-equipped spring snap disk.

Alle diese verschiedenen Konstruktionsvarianten lassen sich mit dem erfindungsgemäßen Schalter realisieren.All these different design variants can be realized with the switch according to the invention.

Die Schaltfunktion des aus der DE 43 45 350 A1 bekannten Schaltwerkes kann erst zuverlässig getestet werden, wenn der Schalter vollständig montiert wurde.The switching function of the DE 43 45 350 A1 Known switching mechanism can only be reliably tested when the switch has been completely assembled.

Damit ist der sofort ersichtliche Nachteil verbunden, dass sowohl bei Problemen mit der Kontaktgabe des beweglichen Kontaktteils und/oder der Feder-Schnappscheibe als auch bei einer Fehlfunktion oder einem Fehleinbau der Bimetall-Schnappscheibe der gesamte Schalter verworfen werden muss.Thus, the immediately apparent disadvantage is associated that both in problems with the contact of the movable contact part and / or the spring snap-action disc as well as in case of malfunction or incorrect installation of the bimetallic snap disk, the entire switch must be discarded.

Obwohl das bekannte temperaturabhängige Schaltwerk sowie der damit ausgestattete, bekannte temperaturabhängige Schalter funktionell sämtlichen Anforderungen genügen, besteht daher ein Bedarf, die Testmöglichkeit und die Montage zu verbessern.Although the known temperature-dependent switching mechanism and the thus equipped, known temperature-dependent switch functionally meet all requirements, there is therefore a need to improve the testability and the installation.

Ein weiterer Nachteil bei dem bekannten Schalter ist darin zu sehen, dass zumindest das Unterteil des Gehäuses sehr präzise gefertigt sein muss, damit die Feder-Schnappscheibe sich mit ihrem Rand sicher auf der umlaufenden Schulter abstützen kann. Vor diesem Hintergrund sind die Unterteile des bekannten temperaturabhängigen Schalters Drehteile, in der Regel aus Messing, was zwar eine hochpräzise Fertigung bedeutet, jedoch mit hohen Produktions- und Stückkosten verbunden ist.Another disadvantage of the known switch is the fact that at least the lower part of the housing must be made very precisely so that the spring snap disc can be supported with its edge securely on the circumferential shoulder. Against this background, the lower parts of the known temperature-dependent switch turned parts, usually made of brass, which means a high-precision manufacturing, but is associated with high production and unit costs.

Obwohl sich derartige temperaturabhängige Schalter im Alltagseinsatz sehr bewährt haben, ist die Montage des Schalters doch zeitaufwändig und kostenintensiv, wobei ein Testen des bekannten Schalters nur nach vollständigem Zusammenbau möglich ist.Although such temperature-dependent switches have proven very successful in everyday use, the assembly of the switch is time-consuming and costly, with testing of the known switch is possible only after complete assembly.

Aus der DE 195 27 254 A1 ist ein temperaturabhängiger Schalter mit einem ein temperaturabhängiges Schaltwerk aufnehmenden Gehäuse bekannt. Das temperaturabhängige Schaltwerk weist eine Bimetall-Schnappscheibe und eine Feder-Schnappscheibe auf, die beide unverlierbar an einem beweglichen Kontaktteil gehalten sind. Die Bimetall-Schnappscheibe liegt mit ihrem Rand zwischen einer Schulter an einem ringförmigen Isolierring und einem Deckel des Gehäuses. Unterhalb der Bimetall-Schnappscheibe liegt die Feder-Schnappscheibe, die mit ihrem Rand lose zwischen einem auf dem inneren Boden des Gehäuseunterteils liegenden Kontaktring und einem elektrisch leitenden Distanzring angeordnet ist. Die relative Lage von Bimetall-Schnappscheibe und Feder-Schnappscheibe zueinander kann auch vertauscht werden.From the DE 195 27 254 A1 is a temperature-dependent switch with a temperature-dependent switching mechanism receiving housing known. The temperature-dependent switching mechanism has a bimetallic snap-action disc and a spring snap-action disc, both of which are held captive on a movable contact part. The bimetallic snap disk lies with its edge between a shoulder on an annular insulating ring and a cover of the housing. Below the bimetallic snap disk is the spring snap disk, which is arranged with its edge loose between a lying on the inner bottom of the housing base contact ring and an electrically conductive spacer ring. The relative position of bimetallic snap disk and spring snap disk to each other can also be reversed.

Aus dem DE 86 90 150 U1 ist es bekannt, eine rechteckige Bimetall-Schnappscheibe unterhalb einer Trägerplatte anzuordnen und dort mittels einer Halterung lose zu halten, deren Seitenwände die Seitenränder der Bimetall-Schnappscheibe übergreifen.From the DE 86 90 150 U1 It is known to arrange a rectangular bimetallic snap disk below a support plate and to hold loose there by means of a holder whose side walls engage over the side edges of the bimetallic snap disk.

Aus dem DE 20 2005 019 880 U1 ist es bekannt, eine runde Bimetall-Schnappscheibe unterhalb einer Wärmeübertragungsplatte anzuordnen und dort lose mit Hilfe von vier Haken zu halten, die den Rand der Bimetall-Schnappscheibe übergreifen.From the DE 20 2005 019 880 U1 It is known to arrange a round bimetallic snap disk below a heat transfer plate and there to hold loosely by means of four hooks which engage over the edge of the bimetallic snap disk.

Aus der DE 10 2011 119 633 B1 ist ein temperaturabhängiger Schalter mit einem ein temperaturabhängiges Schaltwerk aufnehmenden Gehäuse bekannt. Das temperaturabhängige Schaltwerk weist eine Bimetall-Schnappscheibe und eine Feder-Schnappscheibe auf, die beide unverlierbar an einem Kontaktteller gehalten sind, der mit zwei stationären Gegenkontakten innen an dem Gehäusedeckel zusammenwirkt. Die oberhalb der Bimetall-Schnappscheibe angeordnete Feder-Schnappscheibe ist mit ihrem Rand zwischen einer inneren Schulter des Gehäuseunterteils und einem zwischen der Schulter und dem Gehäusedeckel angeordneten Ring geführt.From the DE 10 2011 119 633 B1 is a temperature-dependent switch with a temperature-dependent switching mechanism receiving housing known. The temperature-dependent switching mechanism has a bimetal snap-action disc and a spring snap-action disc, both of which are captively held on a contact plate which cooperates with two stationary mating contacts on the inside of the housing cover. The arranged above the bimetallic snap disk spring snap-action disc is guided with its edge between an inner shoulder of the housing base and a ring arranged between the shoulder and the housing cover.

WO2010/139781 offenbart ein Temperaturabhängiges Schaltwerk nach dem Oberbegriff des Anspruchs 1. WO2010 / 139781 discloses a temperature-dependent switching mechanism according to the preamble of claim 1.

Vor diesem Hintergrund liegt der vorliegenden Erfindung die Aufgabe zugrunde, das bekannte Schaltwerk derart weiterzubilden, dass sich die Montage des damit ausgerüsteten temperaturabhängigen Schalters vereinfacht, insbesondere auch der Schalter selbst mechanisch einfacher und kostengünstiger aufgebaut sein kann.Against this background, the present invention has the object, the known switching mechanism in such a way that simplifies the assembly of the thus equipped temperature-dependent switch, in particular, the switch itself can be constructed mechanically simpler and cheaper.

Bei dem eingangs erwähnten temperaturabhängigen Schaltwerk wird diese Aufgabe erfindungsgemäß dadurch gelöst, dass das Schaltwerk einen ringförmigen Rahmen aufweist, in dem die Bimetall-Schnappscheibe und die ggf. vorgesehene Feder-Schnappscheibe unverlierbar gehalten sind.In the above-mentioned temperature-dependent rear derailleur, this object is achieved in that the switching mechanism has an annular frame in which the bimetallic snap disk and possibly provided spring snap-action disc are held captive.

Die Erfinder der vorliegenden Anmeldung haben nämlich erkannt, dass ein temperaturabhängiges Schaltwerk sozusagen wie ein Druckknopf aufgebaut sein kann, also mit einem ringförmigen Rahmen, in dem die Bimetall-Schnappscheibe oder beiden Schnappscheiben unverlierbar gehalten sind, was vorzugsweise über ihre Ränder erfolgt, um das Umschnappen der Schnappscheiben in ihren jeweiligen Zentren zu ermöglichen.The inventors of the present application have in fact recognized that a temperature-dependent switching mechanism can be constructed, as it were, like a pushbutton, ie with an annular frame in which the bimetallic snap disk or both snap disks are held captive, which preferably takes place over their edges in order to snap it over to allow the domes in their respective centers.

Mit dieser auf den ersten Blick konstruktiv aufwändigeren Konstruktion sind sehr viele Vorteile verbunden, die letztendlich dazu führen, dass mit dem neuen Schaltwerk ausgerüstete temperaturabhängige Schalter einfacher aufgebaut und montiert werden können.With this design, which at first glance is a structurally more complex design, there are many advantages that ultimately lead to the new one Derailleur equipped temperature-dependent switch can be easily assembled and mounted.

Die oder jede Schnappscheibe ist in dem ringförmigen Rahmen unverlierbar angeordnet, so dass das Schaltwerk vorproduziert und geprüft werden kann, ohne dass die komplette Montage eines temperaturabhängigen Schalters selbst erforderlich ist.The or each snap-action disc is captively arranged in the annular frame, so that the switching mechanism can be pre-produced and tested without the complete assembly of a temperature-dependent switch itself is required.

Durch den ringförmigen Rahmen wird die oder jede Schnappscheibe dabei mechanisch vor Beschädigungen geschützt, so dass die komplettierten und geprüften neuen Schaltwerke als Schüttgut zwischengelagert werden können, was die Voraussetzung für eine anschließende automatische Montage der mit dem neuen Schaltwerk ausgestatteten Schalter ist.Through the annular frame, the or each snap-action disc is mechanically protected from damage, so that the completed and tested new derailleur can be stored as bulk material, which is the prerequisite for a subsequent automatic assembly of equipped with the new rear derailleur switch.

Weil die oder jede Schnappscheibe jetzt in dem ringförmigen Rahmen angeordnet ist, können die Unterteile eines damit ausgestatteten temperaturabhängigen Schalters einfacher aufgebaut sein, Drehteile beispielsweise aus Messing sind nicht mehr erforderlich.Because the or each snap-action disc is now arranged in the annular frame, the lower parts of a temperature-dependent switch equipped therewith can be made simpler, rotating parts, for example made of brass, are no longer necessary.

Vorzugsweise ist das Unterteil eines temperaturabhängigen Schalters, der mit dem neuen Schaltwerk ausgestaltet ist, daher ein preiswertes Tiefziehteil aus Stahl.Preferably, the lower part of a temperature-dependent switch, which is designed with the new rear derailleur, therefore, an inexpensive deep-drawn part made of steel.

Der mechanische Schutz der oder jeder Schnappscheibe durch den ringförmigen Rahmen bietet auch mehr Freiheit bei der Formgebung der Gehäuse der mit dem neuen Schaltwerk ausgestatteten temperaturabhängigen Schalter, da sich die Schnappscheiben nicht mehr in dem Gehäuse sondern mit dem ringförmigen Rahmen ausrichten und abstützen.The mechanical protection of the or each snap-action by the annular frame also provides more freedom in shaping the housing of the equipped with the new rear derailleur temperature-dependent switch, since the snap discs are no longer aligned in the housing but with the annular frame and support.

Das neue Schaltwerk kann sowohl in ein zweiteiliges Gehäuse als auch in ein einteiliges, sog. Einschubgehäuse eingelegt werden.The new rear derailleur can be inserted into a two-part housing as well as into a one-piece, so-called slide-in housing.

Während es erfindungsgemäß auch vorgesehen ist, dass das neuen Schaltwerk lediglich eine Bimetall-Schnappscheibe aufweist, die sowohl den Schließdruck herstellt als auch den Betriebsstrom führt, ist es besonders bevorzugt, wenn das neue Schaltwerk eine Bimetall-Schnappscheibe und eine Feder-Schnappscheibe aufweist, wobei beide Schnappscheibe übereinander angeordnet sind.While it is also provided according to the invention that the new derailleur has only a bimetallic snap disk, which produces both the closing pressure and the operating current leads, it is particularly preferred if the new derailleur has a bimetallic snap disk and a spring snap disk, said both snap disc are arranged one above the other.

Der ringförmige Rahmen muss dabei nicht zwingend kreisrund ausgebildet sein, er kann auch oval, rechteckig, quadratisch oder länglich abgerundet ausgebildet sein. Entsprechende Formen weist dann auch die oder jede Schnappscheibe auf. Dies ist insbesondere dann von Vorteil, wenn das neue Schaltwerk in ein Einschubgehäuse eingesetzt werden soll.The annular frame does not necessarily have to be circular, it may also be oval, rectangular, square or oblong rounded. Corresponding shapes then also has the or each snap disc. This is particularly advantageous if the new rear derailleur is to be used in a plug-in housing.

Wird das neue Schaltwerk dagegen in einen üblichen temperaturabhängigen Schalter mit einem zweiteiligen Gehäuse aus Unterteil und Deckelteil eingesetzt, so sind der ringförmige Rahmen und die eine oder beide Schnappscheiben vorzugsweise kreisrund ausgebildet.On the other hand, if the new switching mechanism is inserted into a conventional temperature-dependent switch with a two-part housing comprising the lower part and the cover part, then the annular frame and the one or both snap-action disks are preferably of circular design.

Das bewegliche Kontaktglied kann dabei entweder eine Kontaktbrücke sein, auf der zwei Kontaktteile angeordnet sind, die über die Kontaktbrücke elektrisch miteinander verbunden sind und jeweils mit einem stationären Gegenkontakt zusammenwirken, oder ein Kontaktteil, das mit einem stationären Gegenkontakt zusammenwirkt, wobei der Betriebsstrom dann über eine Schnappscheibe fließt.The movable contact member may be either a contact bridge, on which two contact parts are arranged, which are electrically connected to each other via the contact bridge and each interact with a stationary counter contact, or a contact part, which cooperates with a stationary counter-contact, wherein the operating current then via a Snap disk flows.

Dabei kann das Kontaktglied ferner sowohl ein gesondertes Bauteil sein, als auch an der Bimetall-Schnapsscheibe und/oder der Feder-Schnappscheibe selbst ausgebildet sein.In this case, the contact member may further be both a separate component, as well as be formed on the bimetal schnapps slice and / or the spring snap-action disc itself.

Bei einem mit dem neuen Schaltwerk ausgestatteten temperaturabhängigen Schalter kann der ringförmige Rahmen zudem Höhen- und Wölbungstoleranzen bei den Schnappscheiben ausgleichen, so dass dazu keine weiteren Maßnahmen ergriffen werden müssen.In a equipped with the new rear derailleur temperature-dependent switch, the annular frame can also compensate for height and curvature tolerances in the snap discs, so that no further action must be taken.

Der Rahmen kann dabei so ausgestaltet sein, dass seine Einbauhöhe durch geeignete Verformung des Randes des Rahmens nachjustiert werden kann, um Einbautoleranzen auszugleichen.The frame can be designed so that its installation height can be readjusted by suitable deformation of the edge of the frame to compensate for installation tolerances.

Eine derartige nachträgliche Justierbarkeit ist im Stand der Technik bisher nicht bekannt und technisch auch nicht möglich gewesen.Such subsequent adjustability has hitherto not been known in the prior art and technically also not possible.

Die der Erfindung zugrundeliegende Aufgabe wird auf diese Weise vollkommen gelöst.The problem underlying the invention is completely solved in this way.

Dabei ist es bevorzugt, wenn der ringförmige Rahmen eine obere Ringfläche aufweist, und vorzugsweise eine untere Ringfläche aufweist, wobei weiter vorzugsweise die obere und die untere Ringfläche parallel zueinander angeordnet und durch eine quer zu den Ringflächen verlaufende, umlaufende Zylinderfläche miteinander verbunden sind.It is preferred if the annular frame has an upper annular surface, and preferably has a lower annular surface, wherein more preferably the upper and lower annular surfaces are arranged parallel to each other and connected by a transverse to the annular surfaces, circumferential cylindrical surface.

Diese Maßnahmen sind konstruktiv von Vorteil, sie ermöglichen ein Einspannen des ringförmigen Rahmens nicht nur in dem montierten temperaturabhängigen Schalter sondern auch bereits zum Prüfen außerhalb eines Schalters, ohne dass die Gefahr besteht, dass die in dem Rahmen aufgenommenen Schnappscheiben beschädigt werden.These measures are structurally advantageous, they allow a clamping of the annular frame not only in the mounted temperature-dependent switch but also already for testing outside a switch, without the risk that the recorded in the frame snap discs are damaged.

Über die obere und/oder untere Ringfläche sowie ggf. die Zylinderfläche kann eine Kontaktierung des ringförmigen Rahmens erfolgen, also bspw. der elektrische Kontakt zu einem aus leitfähigem Material bestehenden Unterteil oder einer Prüfeinrichtung.About the upper and / or lower annular surface and possibly the cylindrical surface can be made a contacting of the annular frame, so for example. The electrical contact to a consisting of conductive material lower part or a test device.

Dabei ist es bevorzugt, wenn zwischen der Zylinderfläche und der unteren Ringfläche eine konische Übergangsfläche angeordnet ist.It is preferred if a conical transition surface is arranged between the cylindrical surface and the lower annular surface.

Diese konische Übergangsfläche ermöglicht das Einlegen des neuen Schaltwerkes in tiefgezogene Unterteile, bei denen der Übergang zwischen dem Boden und der umlaufenden Wand nicht exakt rechtwinklig ausgebildet ist. Hier ist also von Vorteil, dass konstruktiv einfache und preiswerte Unterteile für die mit dem neuen Schaltwerk ausgestatteten Schalter verwendet werden können.This conical transition surface allows the insertion of the new rear derailleur in deep-drawn parts, in which the transition between the ground and the circumferential wall is not formed at right angles. So here is an advantage that structurally simple and inexpensive parts can be used for the equipped with the new rear derailleur switch.

Das bewegliche Kontaktglied ist dabei vorzugsweise als bewegliches Kontaktteil ausgebildet, das zwischen Bimetall-Schnappscheibe und Feder-Schnappscheibe angeordnet ist.The movable contact member is preferably formed as a movable contact part, which is arranged between the bimetallic snap disk and spring snap disk.

Bei der Montage wird dann zunächst eine Schnappscheibe in den ringförmigen Rahmen eingelegt" dann das bewegliche Kontaktteil auf die Schnappscheibe gelegt, und dann die andere Schnappscheibe in den Rahmen eingesetzt. Weil die untere Schnappscheibe während des Einlegens des beweglichen Kontaktteils bereits in dem Rahmen gehalten ist, gestaltet sich die Montage des neuen Schaltwerkes sehr einfach.During assembly, a snap-action disc is then firstly inserted into the annular frame, then the movable contact part is placed on the snap-action disc, and then the other snap-action disc is inserted into the frame, because the lower snap-action disc is already held in the frame during insertion of the movable contact part. makes the installation of the new rear derailleur very easy.

An dem ringförmigen Rahmen lässt sich die unter Schnappscheibe nämlich einfacher und zuverlässiger halten als eine lose Schnappscheibe, wobei auch die Gefahr beseitigt ist, dass die Schnappscheibe schon bei diesem Montageschritt beschädigt wird.On the ring-shaped frame, the snap-on disc can be kept simpler and more reliable than a loose snap-action disc, eliminating the risk that the snap-action disc will already be damaged during this assembly step.

Allgemein ist es bevorzugt, wenn die Bimetall-Schnappscheibe unverlierbar mit Spiel an dem beweglichen Kontaktglied festgelegt ist und vorzugsweise die Feder-Schnappscheibe unverlierbar an dem beweglichen Kontaktglied festgelegt ist.In general, it is preferred if the bimetallic snap disk is fixed captive with play on the movable contact member and preferably the spring snap disc is captively fixed to the movable contact member.

Bei dieser Maßnahme ist von Vorteil, dass die drei aktiven Bauteile des neuen Schaltwerkes, also die Bimetall-Schnappscheibe, die Feder-Schnappscheibe und das bewegliche Kontaktglied nicht nacheinander in den ringförmigen Rahmen eingelegt werden müssen, was technisch durchaus möglich ist, sondern als Einheit in den Rahmen eingebracht werden können. Dies erleichtert die Montage des neuen Schaltwerkes.In this measure, it is advantageous that the three active components of the new switching mechanism, so the bimetallic snap disk, the spring snap disc and the movable contact member need not be inserted sequentially in the annular frame, which is technically quite possible, but as a unit in the framework can be introduced. This facilitates the assembly of the new rear derailleur.

Allgemein ist es weiter bevorzugt, wenn innen in dem Rahmen eine untere umlaufende Schulter angeordnet ist, auf der sich die Bimetall-Schnappscheibe beim Übergang in ihrer Tieftemperaturstellung mit ihrem Rand abstützt, wobei vorzugsweise innen in dem Rahmen eine obere umlaufende Schulter angeordnet ist, an der die Feder-Schnappscheibe über ihren Rand festgelegt ist.In general, it is further preferred if inside a lower circumferential shoulder is arranged in the frame, on which the bimetallic snap disk is supported at the transition in its low-temperature position with its edge, preferably inside the frame an upper circumferential shoulder is arranged, on which the spring snap-action disc is fixed over its edge.

Hier ist von Vorteil, dass die beiden für die Schaltfunktion verwendeten Schultern innen in dem ringförmigen Rahmen angeordnet sind, so dass weder der Rand der Bimetall-Schnappscheibe noch der Rand der Feder-Schnappscheibe nach oben oder unten über den Rahmen vorsteht, wenn das Schaltwerk bspw. nach außerhalb eines Schalters geprüft wird und dabei sowohl hohen als auch tiefen Temperaturen ausgesetzt wird.Here it is advantageous that the two shoulders used for the switching function are arranged inside in the annular frame, so that neither the edge of the bimetallic snap disk nor the edge of the spring snap-action disc protrudes upwards or downwards over the frame, if the rear derailleur, for example is tested outside a switch and is exposed to both high and low temperatures.

In der Tieftemperaturstellung, stützt sich die Feder-Schnappscheibe mit ihrem Rand an der oberen umlaufenden Schulter ab und drückt dabei das bewegliche Kontaktglied nach oben, im zusammengebauten Schalter also gegen das oder jedes stationäre Kontaktteil. Die Bimetall-Schnappscheibe ist in dieser Schließstellung kräftefrei unterhalb der Feder-Schnappscheibe.In the low-temperature position, the spring snap-action disc is supported by its edge on the upper circumferential shoulder and pushes the movable contact member upwards, ie in the assembled switch against the or each stationary contact part. The bimetallic snap disk is in this closed position without force below the spring snap disk.

Beim Umschalten in der Hochtemperaturstellung drückt die Bimetall-Schnappscheibe mit ihrem Rand von unten gegen die Feder-Schnappscheibe und öffnet so den Schalter.When switching in the high-temperature position, the bimetallic snap disk presses with its edge from below against the spring snap-action disc and thus opens the switch.

Beim Zurückschalten in die Tieftemperaturstellung schnappt zuerst die Bimetall-Schnappscheibe um, wobei sie sich jetzt wegen des weiter bei der unteren Ringfläche liegenden beweglichen Kontaktglieds mit ihrem Rand auf der unteren Schulter abstützt und dabei über ihr Zentrum das Zentrum der Feder-Schnappscheibe und mit dieser das bewegliche Kontaktglied nach oben drückt, wodurch die Feder-Schnappscheibe wieder in ihre erste geometrisch stabile Lage gedrückt wird, in der sie den Schalter elektrisch geschlossen hält.When switching back to the low temperature position, the bimetallic snap disk first snaps around, whereby it is now supported with its edge on the lower shoulder because of the further lying at the lower annular surface movable contact member while the center of the spring-snap disc and with this the movable contact member pushes upwards, whereby the spring snap-action disc is pressed back into its first geometrically stable position in which it holds the switch electrically closed.

Nach diesem Umschalten liegt die Bimetall-Schnappscheibe wieder kräftefrei in dem Rahmen.After this switching, the bimetallic snap disk is again free of forces in the frame.

Im Rahmen der vorliegenden Erfindung wird unter "oben" oder "oberhalb" eine Richtung von der Bimetall-Schnappscheibe auf das stationäre Kontaktglied zu verstanden, wobei unter "unten" oder "unterhalb" eine Richtung von der Feder-Schnappscheibe auf die unter ihr liegende Bimetall-Schnappscheibe zu verstanden wird.In the context of the present invention, the term "top" or "above" is understood to mean a direction from the bimetallic snap disk to the stationary contact member, with a direction "downward" or "below" from the spring snap disk to the bimetal below it Snapping disk is understood.

Im Gegensatz zu dem Schaltwerk aus der eingangs erwähnten DE 43 45 350 C2 liegt erfindungsgemäß die Bimetall-Schnappscheibe unterhalb der Feder-Schnappscheibe.In contrast to the rear derailleur from the above-mentioned DE 43 45 350 C2 According to the invention, the bimetallic snap-action disc is below the spring snap-action disc.

Dabei ist es bevorzugt, wenn die obere Schulter in einer innen in dem Rahmen umlaufenden Nut angeordnet ist, in der die Feder-Schnappscheibe mit ihrem Rand festgelegt ist, wobei vorzugsweise der Rand der Feder-Schnappscheibe in die Nut eingerastet ist oder alternativ durch einen nach dem Auflegen des Randes der Feder-Schnappscheibe auf die obere Schulter geprägtem Vorsprung festgelegt ist.It is preferred if the upper shoulder is arranged in an inner circumferential groove in the frame in which the spring snap-action disc is fixed with its edge, wherein preferably the edge of the spring snap-action disc is engaged in the groove or alternatively by a the laying of the edge of the spring snap disc on the upper shoulder embossed projection is fixed.

Diese Maßnahme ist zum einen für die Funktion von Vorteil, denn der Rand der Feder-Schnappscheibe ist nach oben und unten festgelegt, kann sich jedoch in der Nut radial nach außen ausdehnen, so dass die Feder-Schnappscheibe beim Umspringen von ihrer einen in die andere geometrisch stabile Lage nicht mechanisch belastet wird.This measure is on the one hand for the function of advantage, because the edge of the spring-snap disc is fixed up and down, but can expand radially outward in the groove, so that the spring-snap disc when jumping from one to the other geometrically stable position is not mechanically stressed.

Diese Maßnahmen sind aber auch hinsichtlich der Montage des Schaltwerkes von Vorteil, weil nämlich die Feder-Schnappscheibe in dem einen Fall lediglich durch Herunterdrücken in die Nut eingerastet wird.However, these measures are also in terms of the assembly of the switching mechanism advantageous because namely the spring snap-action disc is locked in the one case only by pressing down into the groove.

Im anderen Fall werden zunächst die drei aktiven Bauteile einzeln oder als miteinander beispielsweise über das bewegliche Kontaktglied verbundene Einheit in den ringförmigen Rahmen eingelegt und dann ein Vorsprung über den Rand der Feder-Schnappscheibe geprägt.In the other case, first the three active components are inserted individually or as an interconnected, for example via the movable contact member unit in the annular frame and then coined a projection on the edge of the spring snap-action disc.

Durch das Umprägen des Vorsprings kann dabei gleichzeitig die Einbauhöhe des ringförmigen Rahmens justiert werden.By over-embossing of the projection while the installation height of the annular frame can be adjusted at the same time.

In einer Weiterbildung ist es dann bevorzugt, wenn das Schaltwerk ein flaches, blechartiges Stromübertragungsglied aufweist, das mit dem als bewegliches Kontaktteil ausgebildeten Kontaktglied verbunden ist, wobei das Stromübertragungsglied vorzugsweise mit dem ringförmigen Rahmen verbunden ist.In a further development, it is preferred if the derailleur has a flat, blechartiges power transmission member which is connected to the contact member designed as a movable contact part, wherein the current transmitting member is preferably connected to the annular frame.

Die Verbindung zu dem ringförmigen Rahmen kann dabei einerseits dadurch erfolgen, dass das Stromübertragungsglied mit seinem Rand auf der unteren Schulter aufliegt, also auf der Seite der Bimetall-Schnappscheibe angeordnet ist.The connection to the annular frame can on the one hand take place in that the current transfer member rests with its edge on the lower shoulder, that is arranged on the side of the bimetallic snap disk.

Das Stromübertragungsglied kann auch auf Seite der Feder-Schnappscheibe liegen und mit seinem Rand in der umlaufenden Nut angeordnet sein.The current transmission member may also be on the side of the spring snap-action disc and be arranged with its edge in the circumferential groove.

Bei diesen Maßnahmen ist von Vorteil, dass sich beim Öffnen und/oder Schließen eines mit dem neuen Schaltwerk ausgestatteten temperaturabhängigen Schalters ausbildende Lichtbögen nicht zu den Schäden führen, wie dies ohne dieses Stromübertragungsglied erfolgt. Aus diesem Grund ist das Stromübertragungsglied von der Funktion her ein Lichtbogenschirm, wie es in der nicht vorveröffentlichten DE 10 2013 101 393 ausführlich beschrieben ist.In these measures, it is advantageous that when opening and / or closing a equipped with the new switching mechanism temperature-dependent switch forming arcs do not lead to the damage, as is done without this power transmission element. For this reason, the power transmission member in terms of function is an arc screen, as in the not pre-published DE 10 2013 101 393 is described in detail.

Gerade zum Ende der Lebensdauer eines temperaturabhängigen Schaltwerks wandert nämlich der Fußpunkt des Lichtbogens vom beweglichen Kontaktteil auf das Federteil ab, was wegen dessen extrem geringer Dicke dann irgendwann dazu führt, dass Löcher in das Federteil gebrannt werden oder größere Mengen an Metalloxid dort abgelagert werden.Especially at the end of the life of a temperature-dependent rear derailleur namely migrates from the base of the arc of the movable contact part on the spring part, which eventually because of its extremely small thickness causes holes are burned in the spring part or larger amounts of metal oxide are deposited there.

Schon eine lediglich bereichsweise Abdeckung der Oberseite des Federteiles ergibt wider Erwarten einen Schutz sowohl vor herumspritzenden Funken und Metalloxiden als auch vor dem direkten Kontakt mit dem Lichtbogenfuß.Even a partial coverage of the top of the spring member results contrary to expectations, a protection against spattering sparks and metal oxides as well as from direct contact with the arc root.

Erstaunlicherweise führt diese extrem einfache Maßnahme dazu, dass die Lebensdauer der neuen Schalter bei ansonsten gleicher Konstruktion und gleicher Stromstärke verlängert wird, wobei sich sogar herausgestellt hat, dass sich gleichzeitig die maximal zu führende Stromstärke und die Lebensdauer eines mit dem neuen Schaltwerk ausgestatteten Schalters vergrößern lassen.Surprisingly, this extremely simple measure leads to the fact that the life of the new switch is extended with the same construction and the same current strength, although it has even been found that at the same time increase the maximum current rating and lifetime of a switch equipped with the new derailleur.

Wenn das Stromübertragungsglied sowohl mit dem beweglichen Kontaktteil als auch mit dem ringförmigen Rahmen verbunden ist, stellt es eine permanente elektrische Verbindung zwischen dem beweglichen Kontaktteil und dem ringförmigen Rahmen dar, ist also bei elektrisch leitfähigem ringförmigen Rahmen zu der Feder-Schnappscheibe sozusagen elektrisch parallel geschaltet und ermöglicht eine höhere Stärke des fließenden Betriebsstromes.When the current transmitting member is connected to both the movable contact member and the annular frame, it provides a permanent electrical connection between the movable contact member and the annular frame, so it is connected in electrically conductive annular frame to the spring snap disc, so to speak electrically in parallel and allows a higher strength of the flowing operating current.

Alternativ ist es auch möglich, dass das Stromübertragungsglied mit seinem Rand oberhalb der oberen Ringfläche oder unterhalb der unteren Ringfläche angeordnet ist.Alternatively, it is also possible that the current transmitting member is arranged with its edge above the upper annular surface or below the lower annular surface.

Dies bedeutet, dass das Stromübertragungsglied nicht vollständig innerhalb des ringförmigen Rahmens liegt. Der Rand des Stromübertragungsgliedes kann dabei auf der oberen oder unteren Ringfläche beispielsweise durch Punktschweißen befestigt sein.This means that the power transmission member is not completely within the annular frame. The edge of the current transmission member may be fastened on the upper or lower annular surface, for example by spot welding.

Bei der Montage eines mit dem neuen Schaltwerk ausgerüsteten temperaturabhängigen Schalters wird das Stromübertragungsglied so mit seinem Rand zwischen der unteren Ringfläche und dem Boden des Gehäuseunterteiles oder zwischen der oberen Ringfläche und der Innenseite des Deckels eingeklemmt.When mounting a equipped with the new rear derailleur temperature-dependent switch, the power transmission member is clamped with its edge between the lower ring surface and the bottom of the housing base or between the upper annular surface and the inside of the lid.

Wenn der Rand des Stromübertragungsgliedes nicht an die obere bzw. untere ringfläche angeheftet ist, erfolgt die elektrische Kontaktierung des Randes des Stromübertragungsgliedes erst endgültig bei der Montage des mit dem neuen Schaltwerk ausgerüsteten Schalters.If the edge of the current transmitting member is not attached to the upper or lower ring surface, the electrical contacting of the edge of the current transmitting member takes place only during the assembly of the equipped with the new rear derailleur switch.

Allgemein ist es bevorzugt, wenn der ringförmige Rahmen elektrisch leitfähiges Material oder elektrisch isolierendes Material umfasst.In general, it is preferred if the annular frame comprises electrically conductive material or electrically insulating material.

Wenn der ringförmige Rahmen selbst elektrisch leitfähig ist, fließt der Betriebsstrom des zu schützenden Gerätes durch den Rahmen selbst und durch die Feder-Schnappscheibe oder die Bimetall-Schnappscheibe, falls bei einem einfachen Schalter auf die Feder-Schnappscheibe verzichtet wird, und von dieser durch das bewegliche Kontaktteil.When the annular frame itself is electrically conductive, the operating current of the device to be protected flows through the frame itself and through the spring snap-action disc or the bimetallic snap-action disc, if the spring snap-action disc is dispensed with in a simple switch, and by the latter movable contact part.

Ist der Rahmen dagegen aus elektrisch isolierendem Material, so erfolgt die Stromübertragung durch das Stromübertragungsglied, das wie oben beschrieben kontaktiert wird, oder durch das als Kontaktbrücke mit zwei Kontaktteilen ausgebildete Kontaktglied.If, on the other hand, the frame is made of electrically insulating material, then the current is transmitted through the current transmission member, which is contacted as described above, or through the contact member designed as a contact bridge with two contact parts.

Das Stromübertragungsglied kann dann einen kleinen Reihenwiderstand darstellen, so dass es als Heizwiderstand für eine stromabhängige Schaltfunktion sorgt. Dies ist besonders dann sinnvoll, wenn das Stromübertragungsglied mit seinem Rand unterhalb der unteren Ringfläche liegt, weil es sich dann in unmittelbarer Nähe der Bimetall-Schnappscheibe befindet, die durch die entwickelte ohmsche Wärme dann effektiv aufgeheizt wird.The current transfer member can then represent a small series resistance, so that it provides as a heating resistor for a current-dependent switching function. This is particularly useful when the power transmission member lies with its edge below the lower ring surface, because it is then in the immediate vicinity of the bimetallic snap disk, which is then effectively heated by the developed ohmic heat.

Ferner ist dann von Vorteil, dass sich die Feder-Schnappscheibe, die bei geschlossenem Schalter für den Kontaktdruck zwischen dem beweglichen Kontaktteil und dem stationären Gegenkontakt sorgt, nicht so sehr aufgeheizt wird, was ihre Lebensdauer erhöht.Furthermore, it is then advantageous that the spring snap-action disc, which ensures the contact pressure between the movable contact part and the stationary mating contact when the switch is closed, is not heated up so much, which increases its service life.

Wenn der Rahmen aus elektrisch isolierendem Material besteht, fließt der Betriebsstrom durch das bewegliche Kontaktteil und das Stromübertragungsglied, die Feder-Schnappscheibe ist als immer stromlos, was ihre Lebensdauer ebenfalls erhöht.When the frame is made of electrically insulating material, the operating current flows through the movable contact part and the current transfer member, the spring snap-action disc is always de-energized, which also increases their life.

Weiter ist es bevorzugt, wenn der ringförmige Rahmen elektrisches Widerstandsmaterial, vorzugsweise zumindest eine Widerstandsschicht umfasst.It is further preferred if the annular frame comprises electrical resistance material, preferably at least one resistance layer.

Der Rahmen kann dabei selbst bspw. aus PTC-Material oder einem sonstigen geeigneten Material bestehen, wobei er je nach Verschaltung und Anordnung als Selbsthaltewiderstand und/oder als Reihenwiderstand für stromabhängiges Schalten dienen kann.The frame itself may, for example. From PTC material or other suitable material, where it depends on the interconnection and arrangement can serve as a self-holding resistor and / or as a series resistor for current-dependent switching.

Auch wenn das Kontaktglied als Kontaktteller mit zwei Kontaktteilen ausgebildet ist, kann ein Rahmen aus Widerstandsmaterial als Selbsthaltewiderstand dienen.Even if the contact member is designed as a contact plate with two contact parts, a frame of resistance material can serve as a self-holding resistor.

Es ist auch möglich, den ringförmigen Rahmen mit einer Widerstandsschicht zu versehen, die auf der oberen Ringfläche, der unteren Ringfläche und/oder der zylindrischen Außenwand angeordnet ist und als Selbsthaltewiderstand bzw. Reihenwiderstand für stromabhängiges Schalten dient.It is also possible to provide the annular frame with a resistance layer which is arranged on the upper annular surface, the lower annular surface and / or the cylindrical outer wall and serves as a self-holding resistor or series resistance for current-dependent switching.

Alternativ oder zusätzlich kann auch das Stromübertragungsglied mit einem entsprechenden Widerstandswert ausgestaltet werden, so dass es für stromabhängiges Schalten sorgt.Alternatively or additionally, the current transmission element can also be designed with a corresponding resistance value, so that it provides for current-dependent switching.

Je nach Material des ringförmigen Rahmens kann das Schaltwerk auch zur Stabilisierung des Gehäuses dienen, wobei das Schaltwerk auch unmittelbar in eine Aufnahmeöffnung in einem Gerät eingesetzt werden kann, wie dies prinzipiell aus der DE 195 06 342 C1 bekannt ist.Depending on the material of the annular frame, the rear derailleur can also serve to stabilize the housing, wherein the switching mechanism can also be used directly in a receiving opening in a device, as this in principle from the DE 195 06 342 C1 is known.

Weil alle funktionsrelevanten Prüfungen bereits an dem noch nicht in einen temperaturabhängigen Schalter eingebautem Schaltwerk erfolgen können, werden die Ausschusskosten ferner erheblich gesenkt.Because all functionally relevant tests can already be made on the rear derailleur, which has not yet been installed in a temperature-dependent switch, the scrap costs are also considerably reduced.

Vor diesem Hintergrund betrifft die vorliegende Erfindung auch einen temperaturabhängigen Schalter mit einem topfartigen Unterteil, das von einem Deckelteil verschlossen ist, und mit zwei Außenanschlüssen, wobei in dem Schalter das neue temperaturabhängige Schaltwerk angeordnet ist, das in Abhängigkeit von seiner Temperatur eine elektrisch leitende Verbindung zwischen den beiden Außenanschlüssen herstellt.Against this background, the present invention also relates to a temperature-dependent switch with a pot-like lower part, which is closed by a cover part, and with two external terminals, wherein in the switch, the new temperature-dependent switching mechanism is arranged, which, depending on its temperature, an electrically conductive connection between the two external connections manufactures.

Ferner betrifft die vorliegende Erfindung einen temperaturabhängigen Schalter mit einem Einschubgehäuse, an dem zwei Außenanschlüsse vorgesehen sind, wobei in das Einschubgehäuse das neue temperaturabhängige Schaltwerk eingesetzt ist, das in Abhängigkeit von seiner Temperatur eine elektrisch leitende Verbindung zwischen den beiden Außenanschlüssen herstellt.Furthermore, the present invention relates to a temperature-dependent switch with a plug-in housing, on which two external connections are provided, wherein in the plug-in housing, the new temperature-dependent switching mechanism is used, which produces an electrically conductive connection between the two external connections as a function of its temperature.

Weitere Vorteile ergeben sich aus der Beschreibung und der beigefügten Zeichnung.Further advantages will become apparent from the description and the accompanying drawings.

Es versteht sich, dass die vorstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Ausführungsbeispiele der Erfindung sind in der beigefügten Zeichnung dargestellt und werden in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Fig. 1
ein erstes Ausführungsbeispiel eines Schaltwerkes mit ringförmigen Rahmen, in schematischer, geschnittener Darstellung;
Fig. 2
ein weiteres Ausführungsbeispiel des neuen Schaltwerkes in einer Darstellung wie Fig. 1;
Fig. 3
in einer schematischen geschnittenen Seitenansicht einen temperaturabhängigen Schalter, der mit dem Schaltwerk aus Fig. 2 ausgerüstet ist;
Fig. 4
eine Draufsicht auf das Schaltwerk aus Fig. 1, jedoch mit zusätzlichem Stromübertragungsglied;
Fig. 5
eine schematische Draufsicht auf das Stromübertragungsglied aus Fig. 2;
Fig. 6
in einer schematischen geschnittenen Seitenansicht einen Einschubgehäuse, das mit dem Schaltwerk aus Fig. 1 ausgerüstet ist;
Fig. 7
ein schematisches Funktionsbild des Schalters aus Fig. 3;
Fig. 8
eine Darstellung wie in Fig. 7, jedoch mit einem Selbsthaltwiderstand;
Fig. 9
eine Darstellung wie in Fig. 7, jedoch mit einem Reihenwiderstand für stromabhängiges Schalten;
Fig. 10
eine Darstellung wie in Fig. 8, jedoch mit Reihenwiderstand für stromabhängiges Schalten und ohne Stromübertragungsglied; und
Fig. 11
eine Darstellung wie in Fig. 10, jedoch ohne Reihenwiderstand aber mit Selbsthaltewiderstand.
Embodiments of the invention are illustrated in the accompanying drawings and are explained in more detail in the following description. Show it:
Fig. 1
a first embodiment of a switching mechanism with annular frame, in a schematic, sectional representation;
Fig. 2
another embodiment of the new switching mechanism in a representation like Fig. 1 ;
Fig. 3
in a schematic sectional side view of a temperature-dependent switch, with the rear derailleur Fig. 2 is equipped;
Fig. 4
a plan view of the rear derailleur Fig. 1 but with additional power transmission element;
Fig. 5
a schematic plan view of the current transmission member Fig. 2 ;
Fig. 6
in a schematic sectional side view of a plug-in housing, with the rear derailleur Fig. 1 is equipped;
Fig. 7
a schematic functional picture of the switch Fig. 3 ;
Fig. 8
a representation like in Fig. 7 but with a self-holding resistance;
Fig. 9
a representation like in Fig. 7 but with a series resistance for current-dependent switching;
Fig. 10
a representation like in Fig. 8 but with series resistance for current dependent switching and without current transfer element; and
Fig. 11
a representation like in Fig. 10 , but without series resistance but with self-holding resistance.

In Fig. 1 ist mit 10 ein temperaturabhängiges Schaltwerk bezeichnet, das eine kreisförmige Bimetall-Schnappscheibe 11 sowie eine oberhalb der Bimetall-Schnappscheibe 11 angeordnete kreisförmige Feder-Schnappscheibe 12 aufweist. Die Bimetall-Schnappscheibe 11 und die Feder-Schnappscheibe 12 sind unverlierbar an einem beweglichen Kontaktteil 14 angeordnet.In Fig. 1 is designated by a temperature-dependent switching mechanism 10, which has a circular bimetallic snap disk 11 and arranged above the bimetallic snap disk 11 circular spring snap-action disc 12. The bimetallic snap disk 11 and the spring snap disk 12 are arranged captive on a movable contact part 14.

Die Bimetall-Schnappscheibe 11 sowie die Feder-Schnappscheibe 12 sind unverlierbar in einem ebenfalls kreisförmigen ringförmigen Rahmen 15 gehalten, der eine obere Ringfläche 16 sowie eine dazu parallele untere Ringfläche 17 aufweist, die radial weiter innen liegt, als die obere Ringfläche 16. Die obere Ringfläche 16 und die untere Ringfläche 17 sind über eine quer zu den Ringflächen 16, 17 verlaufende Zylinderfläche 18 sowie eine konische Übergangsfläche 19 miteinander verbunden, die geneigt zwischen der Zylinderfläche 18 und die untere Ringfläche 17 verläuft.The bimetallic snap disk 11 and the spring snap-action disc 12 are held captive in a likewise annular annular frame 15 which has an upper annular surface 16 and a lower annular surface 17 parallel thereto, which lies radially further inward than the upper annular surface 16 Ring surface 16 and the lower annular surface 17 are interconnected via a transverse to the annular surfaces 16, 17 extending cylindrical surface 18 and a conical transition surface 19 which extends inclined between the cylindrical surface 18 and the lower annular surface 17.

Während das bewegliche Kontaktteil 14 nach oben über die obere Ringfläche 16 vorsteht, steht die untere Ringfläche 17 nach unten über das bewegliche Kontaktteil 14 und insbesondere über die Bimetall-Schnappscheibe 11 sowie die Feder-Schnappscheibe 12 vor, so dass beim Öffnen des Schaltwerkes 10 das bewegliche Kontaktteil 14 nicht nach unten über die untere Ringfläche 17 vorragt, so dass keine besonderen Maßnahmen getroffen werden müssen, um einen Kontakt zwischen dem beweglichen Kontaktteil 14 und einem inneren Boden eines mit dem Schaltwerk ausgestatteten Schalters zu verhindern, wenn der Schalter öffnet.While the movable contact member 14 projects upwardly above the upper annular surface 16, the lower annular surface 17 is downwardly over the movable Contact part 14 and in particular on the bimetallic snap disk 11 and the spring snap disk 12 before, so that when opening the rear derailleur 10, the movable contact member 14 does not project down over the lower annular surface 17, so that no special measures must be taken to a To prevent contact between the movable contact part 14 and an inner bottom of a switch equipped with the switch when the switch opens.

Die Bimetall-Schnappscheibe 11 liegt mit ihrem Rand 21 lose auf einer innen in dem Rahmen 15 umlaufenden, ringförmigen unteren Schulter 22 auf.The bimetallic snap disk 11 rests with its edge 21 loosely on an inner, in the frame 15 encircling, annular lower shoulder 22.

Die Feder-Schnappscheibe 12 liegt mit ihrem Rand 23 auf einer innen in dem Rahmen 15 ringförmig umlaufenden, oberen Schulter 24 auf, die in einer Nut 25 ausgebildet ist, die durch die Schulter 24 sowie einen den Rand 23 übergreifenden Vorsprung 26 gebildet ist.The spring snap-action disc 12 lies with its edge 23 on an inner in the frame 15 annular circumferential, upper shoulder 24 which is formed in a groove 25 which is formed by the shoulder 24 and the edge 23 cross-projection 26.

Auf diese Weise ist die Feder-Schnappscheibe 12 über ihren Rand 23 unverlierbar in der Nut 25 und somit in dem Rahmen 15 gehalten.In this way, the spring snap-action disc 12 is held captive in the groove 25 and thus in the frame 15 via its edge 23.

An ihrem inneren Abschnitt 27 sitzt die Feder-Schnappscheibe unverlierbar aber mit Spiel in einer umlaufenden Nut 28, die an dem beweglichen Kontaktteil 14 angeordnet ist.At its inner portion 27, the spring snap-action disc sits captive but with play in a circumferential groove 28 which is arranged on the movable contact part 14.

Zwischen der Feder-Schnappscheibe 12 und einer an dem beweglichen Kontaktteil umlaufenden Schulter 29 ist die Bimetall-Schnappscheibe 11 unverlierbar aber mit Spiel gehalten.Between the spring snap-action disc 12 and a circumferential shoulder 29 on the movable contact part, the bimetallic snap-action disc 11 is held captive but with play.

Das Schaltwerk 10 lässt sich schon vor dem Verbauen in einen Schalter testen und als Schüttgut lagern, weil die Ränder 21, 23 der Schnappscheiben 11, 12 durch den Rahmen 15 geschützt sind und die Feder-Schnappscheibe 12 über den Rahmen 15 kontaktiert werden kann.The rear derailleur 10 can be tested before mounting in a switch and store as bulk material, because the edges 21, 23 of the snap discs 11, 12 are protected by the frame 15 and the spring snap-action disc 12 can be contacted via the frame 15.

Wie eingangs erwähnt, kann das Schaltwerk 10 auch nur eine Schnappscheibe aufweisen, nämlich die Bimetall-Schnappscheibe 11, die dann so in dem Rahmen 15 angeordnet wird, wie es in Fig. 1 für die Feder-Schnappscheibe 12 gezeigt ist. Die Bimetall-Schnappscheibe 11 ist dann mit ihrem Rand 21 in der umlaufenden Nut 25 angeordnet und so unverlierbar in dem Rahmen 15 festgelegt. Ferner trägt die Bimetall-Schnappscheibe 11 dann das bewegliche Kontaktteil 14, an dem sie mit ihrem inneren Abschnitt unverlierbar aber mit Spiel in der umlaufenden Nut 28 angeordnet ist.As mentioned above, the rear derailleur 10 may also have only one snap-action disc, namely the bimetal snap-action disc 11, which is then arranged in the frame 15, as it is in Fig. 1 for the spring snap-action disc 12 is shown. The bimetallic snap disk 11 is then arranged with its edge 21 in the circumferential groove 25 and fixed so captive in the frame 15. Furthermore, the bimetallic snap disk 11 then carries the movable contact part 14, on which it is arranged with its inner portion captive but with play in the circumferential groove 28.

Das in Fig. 2 gezeigte temperaturabhängige Schaltwerk 10' ist prinzipiell genauso aufgebaut wie das Schaltwerk 10 aus Fig. 1, es ist jedoch zusätzlich noch mit einem blechartigen Stromübertragungsglied 31 versehen, das an seinem Zentrum 32 an das bewegliche Kontaktteil 14 angeschweißt ist.This in Fig. 2 shown temperature-dependent rear derailleur 10 'is basically the same structure as the rear derailleur 10 Fig. 1 However, it is additionally provided with a sheet-like current transmission member 31 which is welded at its center 32 to the movable contact part 14.

Mit seinem Rand 33 ragt das Stromübertragungsglied 31 über die untere Ringfläche 17. Der Rand 33 kann durch Punktschweißen mit der Ringfläche 17 fest verbunden sein. Auch das Schaltwerk 10' lässt sich so vor dem Verbauen testen.With its edge 33, the current transfer member 31 protrudes beyond the lower annular surface 17. The edge 33 may be fixedly connected to the annular surface 17 by spot welding. Also, the rear derailleur 10 'can be tested before the shoring.

In Fig. 3 ist ein temperaturabhängiger Schalter 35 gezeigt, der ein topfartiges Unterteil 36 aufweist, das von einem tellerartigen Deckelteil 37 verschlossen ist.In Fig. 3 a temperature-dependent switch 35 is shown, which has a pot-like lower part 36 which is closed by a plate-like cover part 37.

In das Unterteil 36 ist das Schaltwerk 10' aus Fig. 2 so eingelegt, dass der Rahmen 15 mit seiner Zylinderfläche 18 innen in Anlage mit einer umlaufenden Wand 38 des Unterteils 36 ist und die umlaufende Wand 38 so stabilisiert.In the lower part 36, the rear derailleur 10 'is made Fig. 2 inserted so that the frame 15 with its cylindrical surface 18 inside in contact with a peripheral wall 38 of the lower part 36 and the peripheral wall 38 so stabilized.

Durch das Einlegen des Schaltwerkes 10' in das Unterteil 36 wird das Stromübertragungsglied 31 mit ihrem Rand 33 zwischen der unteren Ringfläche 17 und einem inneren Boden 39 des Unterteils 36 eingeklemmt.By inserting the rear derailleur 10 'in the lower part 36, the power transmission member 31 is clamped with its edge 33 between the lower annular surface 17 and an inner bottom 39 of the lower part 36.

Das Unterteil 36 ist ein Tiefziehteil, so dass der Übergang zwischen Wand 38 und Boden 39 nicht exakt, insbesondere nicht rechtwinklig ausgebildet ist. Weil der Rahmen 15 die konische Übergangsfläche 19 aufweist, lässt er sich dennoch exakt in dem Unterteil 36 positionieren.The lower part 36 is a deep-drawn part, so that the transition between wall 38 and bottom 39 is not formed exactly, in particular not at right angles. Because the frame 15 has the conical transition surface 19, it can still be positioned exactly in the lower part 36.

Auf der oberen Ringfläche 16 des Rahmens 15 liegt eine Isolierfolie 41 auf, die sich seitlich zwischen dem Deckelteil 37 und der Wand 38 nach oben erstreckt und dann von oben auf das Deckelteil 37 zugedrückt ist, wozu die Wand 38 an ihrem oberen Rand 42 umgebördelt wurde.On the upper annular surface 16 of the frame 15 is an insulating film 41 which extends laterally between the cover member 37 and the wall 38 upwardly and is then pressed from above onto the cover member 37, to which the wall 38 was crimped at its upper edge 42 ,

Auf diese Weise drückt der Rand 42 auf das Deckelteil 37 und dieses über die Isolierfolie 41 auf die obere Ringfläche 16, wodurch der Rahmen 15 und damit das Schaltwerk 10' fest in dem temperaturabhängigen Schalter 35 montiert ist und gleichzeitig der elektrische Kontakt zwischen dem inneren Boden 39 des Unterteils 36 sowie dem Rand 33 des Stromübertragungsgliedes 31 hergestellt ist.In this way, the edge 42 presses on the cover part 37 and this on the insulating film 41 on the upper annular surface 16, whereby the frame 15 and thus the switching mechanism 10 'is fixedly mounted in the temperature-dependent switch 35 and at the same time the electrical contact between the inner bottom 39 of the lower part 36 and the edge 33 of the power transmission member 31 is made.

Der ringförmige Rahmen 15 kann hier sowohl aus elektrisch leitfähigem Material als auch aus elektrisch isolierendem Material gefertigt sein.The annular frame 15 can be made here both of electrically conductive material and of electrically insulating material.

An einer Innenseite 43 des Deckelteils 37 ist ein stationärer Gegenkontakt 44 angeordnet, das in dem in Fig. 3 gezeigten geschlossenen Zustand des Schalters 35 in Anlage mit dem beweglichen Kontaktteil 14 ist.On an inner side 43 of the cover part 37, a stationary mating contact 44 is arranged, which in the in Fig. 3 shown closed state of the switch 35 is in contact with the movable contact part 14.

In dem in Fig. 3 gezeigten Schaltzustand liegt die Bimetall-Schnappscheibe 11 kräftefrei in dem Schaltwerk 10' ein, während die Feder-Schnappscheibe 12 sich mit ihrem Rand 23 in der Nut 25 abstützt und das bewegliche Kontaktteil 14 gegen den stationären Gegenkontakt 44 drückt. Auf diese Weise ist der elektrische Stromkreis zwischen dem stationären Gegenkontakt 44 und dem hier aus elektrisch leitfähigem Material bestehenden Unterteil 36 geschlossen, wobei der Betriebsstrom eines zu schützenden Gerätes über das Stromübertragungsglied 31 und ggf. auch über die Feder-Schnappscheibe 12 fließt.In the in Fig. 3 shown switching state is the bimetallic snap disk 11 forces in the rear derailleur 10 ', while the spring snap disk 12 is supported with its edge 23 in the groove 25 and the movable contact member 14 presses against the stationary counter contact 44. In this way, the electrical circuit between the stationary mating contact 44 and the existing here of electrically conductive material lower part 36 is closed, wherein the operating current of a device to be protected via the current transfer member 31 and possibly also via the spring snap disk 12 flows.

Der Schalter 35 weist zwei Außenanschlüsse auf, die durch den äußeren Boden 36' des Unterteils 36 und die außenliegende Fläche 44' des stationären Gegenkontaktes 44 gebildet werden. Bei geschlossenem Schalter 35 sind die beiden Außenanschlüsse 36' und 44' elektrisch leitend miteinander verbunden.The switch 35 has two outer terminals, which are formed by the outer bottom 36 'of the lower part 36 and the outer surface 44' of the stationary mating contact 44. When switch 35 is closed, the two outer terminals 36 'and 44' are electrically conductively connected to one another.

Wenn sich die Temperatur des Schalters 35 über die Umschalttemperatur der Bimetall-Schnappscheibe 11 hinaus erhöht, so bewegt sich diese mit ihrem Rand 21 in Fig. 3 nach oben und drückt von unten gegen die Feder-Schnappscheibe 12. Dabei zieht sie das bewegliche Kontaktteil 14 von dem stationären Gegenkontakt 44 weg nach unten, bis die Feder-Schnappscheibe 12 von ihrer in Fig. 3 gezeigten einen stabilen geometrischen Konfiguration in ihre andere stabile geometrische Konfiguration umspringt, in der sie das bewegliche Kontaktteil 14 in einem Abstand zu dem stationären Gegenkontakt 44 hält.If the temperature of the switch 35 increases beyond the switching temperature of the bimetallic snap disk 11, so this moves with its edge 21 in Fig. 3 upwards and presses from below against the spring snap-action disc 12. It pulls the movable contact member 14 of the stationary counter-contact 44 away down until the spring snap-action disc 12 of her in Fig. 3 shown a stable geometric configuration in its other stable geometric configuration umspringt in which it keeps the movable contact part 14 at a distance to the stationary mating contact 44.

Wenn sich die Temperatur des Schalters 35 wieder absenkt, so springt zuerst die Bimetall-Schnappscheibe wieder in ihre in Fig. 3 gezeigte Konfiguration. Weil das bewegliche Kontaktteil 14 jetzt weiter unten in Richtung des Bodens 39 liegt, gelangt die Bimetall-Schnappscheibe 11 dabei mit ihrem Rand 21 in Anlage mit der umlaufenden Schulter 22 und drückt bei weiterer Formänderung über das Zentrum der Feder-Schnappscheibe 12 das bewegliche Kontaktteil 14 auf den stationären Gegenkontakt 44 zu. Dabei wird auch die Feder-Schnappscheibe 12 in ihrer Mitte nach oben gebogen, bis sie wieder in ihre in Fig. 3 gezeigte stabile geometrische Konfiguration umspringt, in der sie das bewegliche Kontaktteil 14 gegen den stationären Gegenkontakt 44 drückt.When the temperature of the switch 35 lowers again, so first jumps the bimetallic snap disk back in their in Fig. 3 shown configuration. Because the movable contact member 14 is now further down in the direction of the bottom 39, the bimetallic snap disk 11 comes with its edge 21 in abutment with the peripheral shoulder 22 and presses upon further change in shape over the center of the spring snap disk 12, the movable contact part 14th to the stationary counter contact 44 to. In this case, the spring snap-action disc 12 is bent in its center up until they return to their in Fig. 3 shown stable geometric configuration in which it presses the movable contact member 14 against the stationary mating contact 44.

In diesem Schaltzustand ist die Bimetall-Schnappscheibe 11 wieder kräftefrei gelagert.In this switching state, the bimetallic snap disk 11 is again stored without force.

Wenn der ringförmige Rahmen 15 aus einem elektrisch isolierenden Material besteht, kann auf die Einlage der Isolierfolie 41 verzichtet werden. Der Betriebsstrom fließt dann bei geschlossenem Schalter 35 nur durch das Stromübertragungsglied 31, das sich je nach ihrem Durchgangswiderstand dabei aufheizt.If the annular frame 15 is made of an electrically insulating material, can be dispensed with the insert of the insulating film 41. The operating current then flows when the switch 35 is closed only by the current transfer member 31, which heats up depending on their contact resistance.

Weil das Stromübertragungsglied 31 auf der Seite der Bimetall-Schnappscheibe 11 liegt, führt die sich entwickelnde ohmsche Wärme zu einem schnellen Aufheizen der Bimetall-Schnappscheibe 11, was ein genaues Ansprechen des Schalters 35 auf einen zu hohen Betriebsstrom eines zu schützenden Gerätes sicherstellt.Because the current transmitting member 31 is located on the side of the bimetallic snap disk 11, the evolving ohmic heat leads to rapid heating of the bimetallic snap disk 11, which ensures an accurate response of the switch 35 to an excessive operating current of a device to be protected.

Weil die Feder-Schnappscheibe 12 bei dieser Ausführung stromlos bleibt, zeigt sie eine lange Lebensdauer.Because the spring snap-action disc 12 remains de-energized in this design, it shows a long life.

Sofern der ringförmige Rahmen 15 aus einem elektrisch leitfähigen Material besteht oder mit einer Schicht aus einem elektrisch leitfähigen Material belegt ist, stellt er einen Parallelwiderstand dar, der parallel zu dem Schaltwerk 10' sowohl mit dem elektrisch leitfähigen Deckelteil 37 als auch mit dem elektrisch leitfähigen Unterteil 36 verbunden ist, wenn auch hier auf die Einlage der Isolierfolie 41 verzichtet wird.If the annular frame 15 consists of an electrically conductive material or is covered with a layer of an electrically conductive material, it represents a parallel resistor which is parallel to the switching mechanism 10 'both with the electrically conductive cover part 37 and with the electrically conductive lower part 36 is connected, although here is dispensed with the insert of the insulating film 41.

Solange das Schaltwerk geschlossen ist, ist der so gebildete Selbsthaltewiderstand durch das gut elektrisch leitfähige Stromübertragungsglied 31 kurzgeschlossen. Wenn der Schalter 35 jedoch öffnet, liegt der durch den ringförmigen Rahmen 15 gebildete Selbsthaltewiderstand jetzt in Reihe zwischen dem stationären Gegenkontakt 44 und dem Unterteil 36, so dass ein Reststrom durch den Schalter 35 fließt, der das Schaltwerk solange geöffnet hält, bis die Spannungsversorgung des zu schützenden elektrischen Gerätes abgeschaltet wird.As long as the rear derailleur is closed, the self-holding resistor thus formed is short-circuited by the highly electrically conductive current transmitting member 31. However, when the switch 35 opens, the self-holding resistor formed by the annular frame 15 is now in series between the stationary mating contact 44 and the base 36, so that a residual current flows through the switch 35, which keeps the switching mechanism open until the power supply of is switched off to be protected electrical device.

Zusätzlich kann das Stromübertragungsglied 31 als Heizwiderstand für ein stromabhängiges Schalten sorgen.In addition, the power transmission member 31 can provide as a heating resistor for a current-dependent switching.

In einer Abwandlung kann bei dem Schalter aus Fig. 3 auch das Schaltwerk 10 aus Fig. 1 eingesetzt werden, so dass der Stromfluss dann ausschließlich durch die Feder-Schnappscheibe 12 erfolgt.In a modification may be at the switch off Fig. 3 also the rear derailleur 10 Fig. 1 are used, so that the current flow then takes place exclusively by the spring snap-action disc 12.

Auch in diesem Fall kann der ringförmige Rahmen 15 aus elektrisch leitfähigem Material bestehen oder bspw. auf der Zylinderfläche 18 oder der unteren Ringfläche 17 eine elektrisch leitfähige Schicht aufweisen.Also in this case, the annular frame 15 may consist of electrically conductive material or, for example, on the cylindrical surface 18 or the lower annular surface 17 have an electrically conductive layer.

Auf diese Weise würde dann ein Reihenwiderstand gebildet, der in Reihe zu der Feder-Schnappscheibe 12 geschaltet ist und auf die eingangs geschilderte Weise für ein stromabhängiges Schalten des Schalters 35 sorgt.In this way, a series resistor would then be formed, which is connected in series with the spring snap disk 12 and provides in the manner described above for a current-dependent switching of the switch 35.

Ferner kann der Rahmen 15 so mit Widerstandsmaterial belegt sein, dass er als Selbsthaltewiderstand wirkt.Further, the frame 15 may be so covered with resistive material that it acts as a self-holding resistor.

Die Höhe des Rahmens 15 zwischen oberer und unterer Ringfläche 16, 17 kann dabei so gewählt sein, dass das bewegliche Kontaktteil 14 bei geöffnetem Schalter 35 nicht in Anlage mit dem Boden 39 gelangt.The height of the frame 15 between the upper and lower annular surface 16, 17 may be chosen so that the movable contact member 14 does not come into contact with the bottom 39 when the switch 35 is open.

Während in Fig. 2 ein Stromübertragungsglied 31 gezeigt ist, das nach unten über die untere Ringfläche 17 übersteht, zeigt die Fig. 4 eine Draufsicht auf das Schaltwerk 10 aus Fig. 1, das jetzt mit einem Stromübertragungsglied 45 versehen ist, das einerseits mit dem beweglichen Kontaktteil 14 und andererseits mit der oberen Ringfläche 16 verbunden ist, unter die es sich erstreckt.While in Fig. 2 a current transfer member 31 is shown, which projects down over the lower annular surface 17, shows the Fig. 4 a plan view of the rear derailleur 10 Fig. 1 , which is now provided with a current transmitting member 45, which is connected on the one hand to the movable contact part 14 and on the other hand to the upper annular surface 16, under which it extends.

Alternativ könnte das Stromübertragungsglied 45 sich auch über die obere Ringfläche 16 erstrecken, so dass es dann in einem Schalter 35 zwischen oberer Ringfläche und Innenseite 43 des Deckelteils 37 eingeklemmt wäre.Alternatively, the current transfer member 45 could also extend over the upper annular surface 16, so that it would then be clamped in a switch 35 between the upper annular surface and the inner side 43 of the cover part 37.

Bei dem Schaltwerk 10 aus Fig. 4 ist das Stromübertragungsglied 45 jedoch permanent sowohl mit dem beweglichen Kontaktteil 14 als auch mit dem Rahmen 15 verbunden, so dass es nicht nur der Stromübertragung sondern auch als Lichtbogenschirm dient.In the rear derailleur 10 off Fig. 4 However, the power transmission member 45 is permanently connected to both the movable contact member 14 and the frame 15, so that it serves not only the power transmission but also as an arc screen.

Das Stromübertragungsglied 45 kann sich auch nur zu einer Seite von dem beweglichen Kontaktteil 14 weg erstrecken, um so einen großen Bereich der Oberseite der Feder-Schnappscheibe frei zu lassen.The current transmitting member 45 may also extend only to one side away from the movable contact member 14 so as to leave free a large area of the top of the spring snap-action disc.

In Fig. 5 ist in einer schematischen Draufsicht ein Ausführungsbeispiel für das Stromübertragungsglied 31 aus Fig. 2 gezeigt. Das Stromübertragungsglied 31 ist als kreisförmige Scheibe ausgebildet, in der sich gebogene, spiralförmig und radial nach außen verlaufende Schlitze 46, 47 befinden. Diese Schlitze 46, 47 reduzieren die Federwirkung des Stromübertragungsgliedes 31, so dass es beim Schalten der Federkraft der Bimetall-Schnappscheibe und der der Feder-Schnappscheibe 12 nicht entgegenwirkt.In Fig. 5 is an embodiment of the current transfer member 31 in a schematic plan view Fig. 2 shown. The current transmitting member 31 is formed as a circular disc in which curved, spiral and radially outwardly extending slots 46, 47 are located. These slots 46, 47 reduce the spring action of the current transfer member 31, so that it does not counteract when switching the spring force of the bimetallic snap disk and the spring snap-action disc 12.

In Fig. 6 ist ein Einschubgehäuse 50 mit Wänden 51 aus elektrisch isolierendem Material gezeigt die eine Einschuböffnung 52 begrenzen. In die Einschuböffnung 52 ist das Schaltwerk 10 aus Fig. 1 eingeschoben. Dabei gelangt der Rahmen 15 in Anlage mit einer Bodenelektrode 53 und das bewegliche Kontaktteil 14 in Anlage mit einer Deckelelektrode 54.In Fig. 6 a plug-in housing 50 is shown with walls 51 of electrically insulating material which limit an insertion opening 52. In the insertion opening 52, the rear derailleur 10 is made Fig. 1 inserted. In this case, the frame 15 comes into contact with a bottom electrode 53 and the movable contact part 14 in abutment with a cover electrode 54th

Bodenelektrode 53 und Deckelelektrode 54 sind innen an den Wänden 51 ausgebildet und auf nicht gezeigte Weise mit Außenanschlüssen 55 bzw. 56 verbunden.Bottom electrode 53 and cover electrode 54 are formed on the inside of the walls 51 and connected in a manner not shown with external terminals 55 and 56, respectively.

Das Einschubgehäuse 50 kann so als temperaturabhängiger Schalter verwendet werden, in dem das Schaltwerk 10 zwischen den Außenanschlüssen 56, 57 temperaturabhängig eine elektrische Verbindung herstellt oder öffnet.The plug-in housing 50 can be used as a temperature-dependent switch, in which the switching mechanism 10 between the external terminals 56, 57 produces or opens an electrical connection depending on temperature.

Es ist auch möglich, dass das Einschubgehäuse 50 Teil eines zu schützenden Gerätes ist, in dem eine Tasche die Einschuböffnung 52 bildet. Die Außenanschlüsse können dann zu Wicklungen oder Bauteilen führen, zwischen denen das Schaltwerk 10 temperaturabhängig eine elektrische Verbindung herstellt oder öffnet.It is also possible that the insertion housing 50 is part of a device to be protected, in which a pocket forms the insertion opening 52. The external connections can then lead to windings or components between which the switching mechanism 10 establishes or opens a temperature-dependent electrical connection.

In Fig. 7 ist ein schematisches Funktionsbild des Schalters 35 aus Fig. 3 gezeigt. Der Schalter 35 ist geschlossen, so dass der Betriebsstrom des zu schützenden elektrischen Gerätes durch das Deckelteil 35 und das bewegliche Kontaktteil 14, von diesem durch die Feder-Schnappscheibe 12 und parallel durch das Stromübertragungsglied 31, und dann durch den Rahmen 15 und das Unterteil 36 fließt.In Fig. 7 is a schematic functional picture of the switch 35 Fig. 3 shown. The switch 35 is closed, so that the operating current of the electrical appliance to be protected by the cover part 35 and the movable contact part 14, from this by the spring snap-action disc 12 and in parallel by the current transfer member 31, and then by the frame 15 and the lower part 36th flows.

Wenn der Rahmen aus elektrisch isolierendem Material besteht, fließt der Betriebsstrom folglich nur durch das Deckelteil 35 und das bewegliche Kontaktteil 14, von diesem durch das Stromübertragungsglied 31 und dann durch das Unterteil 36.Consequently, when the frame is made of electrically insulating material, the operating current flows only through the lid part 35 and the movable contact part 14, from the latter through the current transmitting member 31 and then through the lower part 36.

Auf die Isolierfolie 41 kann dann verzichtet werden.On the insulating film 41 can then be dispensed with.

Bei dem Schalter 35' aus Fig. 8 ist die Isolierfolie 41 gegen eine zwischen Deckelteil 37 und Rahmen 15 liegende Widerstandsschicht 57 ausgetauscht. Der Rahmen 15 besteht aus elektrisch leitfähigem Material. Im geschlossenen Zustand fließt der Strom wie bei dem Schalter 35 aus Fig. 7. Wird der Schalter 35' jedoch geöffnet, so fließt ein Reststrom durch Deckelteil 37, Widerstandsschicht 57, Rahmen 15 und Unterteil 36. Dabei entwickelt sich in der Widerstandsschicht 57 eine hinreichende ohmsche Wärme, die ein Abkühlen der Bimetall-Schnappscheibe 11 unter ihre Rücksprungtemperatur verhindert, so dass der Schalter 35' geöffnet bleibt.At the switch 35 'off Fig. 8 the insulating film 41 is replaced by a lying between the cover part 37 and frame 15 resistance layer 57. The frame 15 is made of electrically conductive material. When closed, the current flows as in the switch 35 Fig. 7 , However, if the switch 35 'is opened, a residual current flows through cover part 37, resistance layer 57, frame 15 and lower part 36. In the resistance layer 57, a sufficient ohmic heat develops, which prevents the bimetallic snap disk 11 from cooling below its return temperature. so that the switch 35 'remains open.

Statt einer Widerstandsschicht 57 kann der Rahmen 15 auch selbst ganz oder teilweise aus Widerstandsmaterial bestehen, um die Selbsthaltefunktion zu realisieren.Instead of a resistive layer 57, the frame 15 may also itself entirely or partially consist of resistance material in order to realize the self-holding function.

In Fig. 9 ist der Schalter 35 aus Fig. 7 so abgewandelt, dass das Stromübertragungsglied 31 als Reihenwiderstand ausgebildet ist. Der Rahmen 15 ist elektrisch isolierend, so dass auf die Isolierfolie 41 verzichtet werden kann.In Fig. 9 the switch 35 is off Fig. 7 modified so that the power transmission member 31 is formed as a series resistor. The frame 15 is electrically insulating, so that it is possible to dispense with the insulating film 41.

Im geschlossenen Zustand des Schalters 35' fließt der Betriebsstrom durch Deckelteil 37, bewegliches Kontaktteil 14 und Stromübertragungsglied 31 in das Unterteil 36. Dabei heizt sich das Stromübertragungsglied 31 durch den integrierten Reihenwiderstand bei zu hohem Stromfluss so weit auf, dass die entwickelte ohmsche Wärme den Schalter 35" bereits öffnet, bevor die von dem zu schützenden Gerät entwickelte Wärme ihn soweit aufheizt, dass er öffnet.In the closed state of the switch 35 ', the operating current flows through cover part 37, movable contact member 14 and current transfer member 31 in the lower part 36. In this case, the current transmission member 31 heated by the integrated series resistance at high current flow so far that the developed ohmic heat the switch 35 "already opens before the heat developed by the device to be protected heats it up to the point where it opens.

In Fig. 10 ist der Schalter 35 aus Fig. 7 gezeigt, jedoch ohne Stromübertragungsglied 31. Dafür ist der Rahmen 15 aus Widerstandsmaterial, so dass er als Reihenwiderstand für stromabhängiges Schalten wirkt.In Fig. 10 the switch 35 is off Fig. 7 shown, but without Stromübertragungsglied 31. For the frame 15 is made of resistance material, so that it acts as a series resistor for current-dependent switching.

Im geschlossenen Zustand des Schalters 35"' fließt der Betriebsstrom durch Deckelteil 37, bewegliches Kontaktteil 14, Feder-Schnappscheibe 12 und Rahmen 15 in das Unterteil 36. Dabei heizt sich der Rahmen 15 durch den integrierten Reihenwiderstand bei zu hohem Stromfluss so weit auf, dass die entwickelte ohmsche Wärme den Schalter 35" bereits öffnet, bevor die von dem zu schützenden Gerät entwickelte Wärme ihn soweit aufheizt, dass er öffnet.In the closed state of the switch 35 "'the operating current flows through cover part 37, movable contact part 14, spring snap-action disc 12 and frame 15 in the lower part 36. In this case heats up the frame 15 by the integrated series resistance at high current flow so far on that the developed ohmic heat the Switch 35 "already opens before the heat developed by the device to be protected heats it up so far that it opens.

In Fig. 11 ist der Schalter 35'" aus Fig. 10 gezeigt, wobei der Rahmen 15 hier elektrisch leitend ist. Statt der Isolierfolie 41 ist wie bei dem Schalter 35' aus Fig. 8 eine Widerstandsschicht 57 vorgesehen.In Fig. 11 is the switch 35 '"off Fig. 10 shown, wherein the frame 15 is electrically conductive here. Instead of the insulating film 41 is as in the switch 35 'off Fig. 8 a resistance layer 57 is provided.

I m geschlossenen Zustand des Schalters 35IV fließt der Betriebsstrom durch Deckelteil 37, bewegliches Kontaktteil 14, Feder-Schnappscheibe 12 und Rahmen 15 in das Unterteil 36.In the closed state of the switch 35 IV , the operating current flows through cover part 37, movable contact part 14, spring snap-action disc 12 and frame 15 into the lower part 36.

Wenn der Schalter 35IV öffnet, so fließt ein Reststrom durch Deckelteil 37, Widerstandsschicht 57, Rahmen 15 und Unterteil 36. Dabei entwickelt sich in der Widerstandsschicht 57 eine hinreichende ohmsche Wärme, die ein Abkühlen der Bimetall-Schnappscheibe 11 unter ihre Rücksprungtemperatur verhindert, so dass der Schalter 35' geöffnet bleibt.When the switch 35 opens IV , a residual current flows through the cover part 37, resistance layer 57, frame 15 and lower part 36. In the resistance layer 57, sufficient ohmic heat develops, which prevents cooling of the bimetallic snap disk 11 below its return temperature that the switch 35 'remains open.

Statt einer Widerstandsschicht 57 kann der Rahmen 15 auch hier selbst ganz oder teilweise aus Widerstandsmaterial bestehen, um die Selbsthaltefunktion zu realisieren.Instead of a resistive layer 57, the frame 15 here as well may consist entirely or partially of resistance material in order to realize the self-holding function.

Zusätzlich kann der Schalter 35IV noch eine Widerstandsschicht 58 zwischen Rahmen 15 und Unterteil 36 aufweisen, die als Reihenwiderstand für stromabhängiges Schalten sorgt, weil er bei geschlossenem Schalter 35IV im Stromkreis des Betriebsstromes liegt und sich bei zu hohem Stromfluss so weit aufheizt, dass der Schalter 35IV öffnet.In addition, the switch 35 IV may still have a resistive layer 58 between the frame 15 and lower part 36, which provides series resistance for current-dependent switching, because he is 35 IV closed circuit in the circuit of the operating current and heats up at high current flow so far that the Switch 35 IV opens.

Der Widerstandswert der Widerstandsschicht 57 ist dabei sehr viel größer als der der Widerstandsschicht 58.The resistance of the resistive layer 57 is much greater than that of the resistive layer 58.

Claims (26)

  1. Temperature-dependent switching mechanism comprising a bimetal snap-action disc (11) and a movable contact member (14),
    characterized in that the switching mechanism (10, 10') comprises an annular frame (15), in which the bimetal snap-action disc (11) is captively held.
  2. Switching mechanism according to Claim 1, characterized in that is comprises a spring snap-action disc (12) captively held in said annular frame (15).
  3. Switching mechanism according to Claim 1 or 2, characterized in that the annular frame (15) has an upper ring surface (16).
  4. Switching mechanism according to anyone of Claims 1 to 3, characterized in that the annular frame (15) has a lower ring surface (17).
  5. Switching mechanism according to Claim 3 and 4, characterized in that the upper ring surface (16) and the lower ring surface (17) are arranged parallel to one another and are interconnected by a peripheral cylinder surface (18) running transversely to the ring surfaces (16, 17).
  6. Switching mechanism according to Claim 5, characterized in that a conical transition surface (19) is arranged between the cylinder surface (18) and the lower ring surface (17).
  7. Switching mechanism according to anyone of Claims 2 to 6, characterized in that the contact member is a movable contact part, which is arranged between the bimetal snap-action disc (11) and the spring snap-action disc (12).
  8. Switching mechanism according to anyone of Claims 1 to 7, characterized in that the bimetal snap-action disc (11) is fixed captively with play to the movable contact member (14).
  9. Switching mechanism according to anyone of Claims 2 to 8, characterized in that the spring snap-action disc (12) is fixed captively to the movable contact member (14).
  10. Switching mechanism according to anyone of Claims 2 to 9, characterized in that a lower peripheral shoulder (22) is arranged internally in the frame (15), on which shoulder the bimetal snap-action disc (11) is supported via its rim (21) during the transition into its low-temperature position.
  11. Switching mechanism according to anyone of Claims 2 to 10, characterized in that an upper peripheral shoulder (24) is arranged inwardly in the frame, on which shoulder the spring snap-action disc (12) is fixed via its edge (23).
  12. Switching mechanism according to Claim 11, characterized in that the upper shoulder (24) is arranged in a groove (25) running peripherally internally in the frame (15), in which groove the spring snap-action disc (12) is fixed via its edge (23).
  13. Switching mechanism according to Claim 12, characterized in that the rim (23) of the spring snap-action disc (12) is latched into the groove (25).
  14. Switching mechanism according to Claim 11, characterized in that the rim (23) of the spring snap-action disc (12) is fixed by a protrusion (26) shaped once the rim (23) of the spring snap-action disc (12) has been placed on the upper shoulder (24).
  15. Switching mechanism according to anyone of Claims 1 or 3 to 6, characterized in that a groove running peripherally internally in the frame (15) is provided, in which groove the bimetall snap-action disc (11) is fixed via its rim (21).
  16. Switching mechanism according to anyone of Claims 1 to 15, characterized in that it comprises a current transfer member (31), which is connected to the contact member formed as a movable contact part (14).
  17. Switching mechanism according to Claim 16, characterized in that the current transfer member (31) is connected to the annular frame (15).
  18. Switching mechanism according to Claim 16 or 17, characterized in that the current transfer member (31) is arranged between the upper and the lower ring surface (16, 17).
  19. Switching mechanism according to Claim 16 or 17, characterized in that the current transfer member (31) is arranged with its rim (33) above the upper ring surface (16).
  20. Switching mechanism according to Claim 16 or 17, characterized in that the current transfer member (31) is arranged with its rim (33) below the lower ring surface (17).
  21. Switching mechanism according to anyone of Claims 1 to 20, characterized in that the annular frame (15) comprises electrically conductive material.
  22. Switching mechanism according to anyone of Claims 1 to 20, characterized in that the annular frame (15) comprises electrically insulating material.
  23. Switching mechanism according to anyone of Claims 1 to 22, characterized in that the annular frame (15) comprises electrical resistance material, preferably at least one resistive layer (57, 58).
  24. Temperature-dependent switch comprising a pot-like lower part (36), which is closed by a cover part (37), and comprising two outer connections (36', 44'), wherein the temperature-dependent switching mechanism (10, 10') according to anyone of Claims 1 to 23 is arranged in the switch (35), and said temperature-dependent switching mechanism, depending on the temperature thereof, produces an electrically conductive connection between the two outer connections (36', 44').
  25. Switch according to Claim 24, characterized in that the lower part (36) is a deep-drawn part.
  26. Temperature-dependent switch comprising an slip-in housing (50), on which two outer connections (56, 57) are provided, wherein the temperature-dependent switching mechanism (10, 10') according to anyone of Claims 1 to 23 is inserted into the slip-in housing (50), and said temperature dependent switching mechanism, depending on the temperature thereof, produces an electrically conductive connection between the two outer connections (56, 57).
EP14187984.1A 2013-10-17 2014-10-07 Temperature-dependent switching device Active EP2874171B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201310017232 DE102013017232A1 (en) 2013-10-17 2013-10-17 Temperature-dependent derailleur

Publications (2)

Publication Number Publication Date
EP2874171A1 EP2874171A1 (en) 2015-05-20
EP2874171B1 true EP2874171B1 (en) 2016-03-30

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EP14187984.1A Active EP2874171B1 (en) 2013-10-17 2014-10-07 Temperature-dependent switching device

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US (1) US10256061B2 (en)
EP (1) EP2874171B1 (en)
CN (1) CN104576193A (en)
DE (1) DE102013017232A1 (en)
DK (1) DK2874171T3 (en)
ES (1) ES2579378T3 (en)
HK (1) HK1206483A1 (en)
HU (1) HUE029674T2 (en)
PL (1) PL2874171T3 (en)

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DE102014108518A1 (en) 2014-06-17 2015-12-17 Thermik Gerätebau GmbH Temperature-dependent switch with spacer ring
DE102019128367B4 (en) * 2019-10-21 2021-06-10 Marcel P. HOFSAESS TEMPERATURE DEPENDENT SWITCH
DE102022118405B3 (en) * 2022-07-22 2023-08-24 Marcel P. HOFSAESS Temperature-dependent switching mechanism and temperature-dependent switch with such a switching mechanism
DE102022118402B3 (en) * 2022-07-22 2023-08-24 Marcel P. HOFSAESS Temperature dependent switching mechanism, temperature dependent switch and method for manufacturing a temperature dependent switching mechanism
DE102022120446B3 (en) 2022-08-12 2023-11-30 Marcel P. HOFSAESS Temperature dependent switch
DE102022120447B3 (en) 2022-08-12 2023-11-30 Marcel P. HOFSAESS Temperature dependent switch
DE102022120445B3 (en) 2022-08-12 2023-11-30 Marcel P. HOFSAESS Temperature dependent switch
DE102022134380B3 (en) * 2022-12-21 2024-02-08 Marcel P. HOFSAESS Temperature-dependent switching mechanisms and temperature-dependent switches with such a switching mechanism
DE102023102304B4 (en) * 2023-01-31 2024-08-08 Marcel P. HOFSAESS Temperature-dependent switching mechanism and temperature-dependent switch
DE102023005419A1 (en) 2023-01-31 2024-10-02 Marcel P. HOFSAESS Temperature-dependent switching mechanism and temperature-dependent switch
DE102023104830B3 (en) 2023-02-28 2024-05-16 Marcel P. HOFSAESS Temperature dependent switch

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Also Published As

Publication number Publication date
HK1206483A1 (en) 2016-01-08
US10256061B2 (en) 2019-04-09
CN104576193A (en) 2015-04-29
EP2874171A1 (en) 2015-05-20
DE102013017232A1 (en) 2015-04-23
PL2874171T3 (en) 2016-09-30
US20150109092A1 (en) 2015-04-23
DK2874171T3 (en) 2016-07-18
ES2579378T3 (en) 2016-08-10
HUE029674T2 (en) 2017-03-28

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