EP4528772A2 - Mécanisme de commutation dépendant de la température et commutateur dépendant de la température - Google Patents

Mécanisme de commutation dépendant de la température et commutateur dépendant de la température Download PDF

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Publication number
EP4528772A2
EP4528772A2 EP25156933.1A EP25156933A EP4528772A2 EP 4528772 A2 EP4528772 A2 EP 4528772A2 EP 25156933 A EP25156933 A EP 25156933A EP 4528772 A2 EP4528772 A2 EP 4528772A2
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EP
European Patent Office
Prior art keywords
temperature
switching mechanism
retaining ring
dependent
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP25156933.1A
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German (de)
English (en)
Other versions
EP4528772A3 (fr
Inventor
Marcel P. Hofsaess
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP4528772A2 publication Critical patent/EP4528772A2/fr
Publication of EP4528772A3 publication Critical patent/EP4528772A3/fr
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/04—Bases; Housings; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/64—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H2037/5454—Thermally-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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H2037/5463—Thermally-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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/04—Bases; Housings; Mountings
    • H01H37/06—Bases; Housings; Mountings to facilitate replacement, e.g. cartridge housing

Definitions

  • the present invention relates to a temperature-dependent switching mechanism for a temperature-dependent switch.
  • the present invention further relates to a temperature-dependent switch with such a temperature-dependent switching mechanism.
  • Temperature-dependent switches are already known in many different forms. An example of a temperature-dependent switch is shown in DE 10 2013 102 089 A1 revealed.
  • Such temperature-dependent switches are used in a conventional manner to monitor the temperature of a device.
  • the switch is brought into thermal contact with the device to be protected, for example, via one of its outer surfaces, so that the temperature of the device to be protected influences the temperature of the switching mechanism located inside the switch.
  • the switch is typically connected electrically in series via connecting cables into the supply circuit of the device to be protected, so that below the response temperature of the switch, the supply current of the device to be protected flows through the switch.
  • the switching mechanism is arranged inside the switch housing.
  • the switch housing is constructed in two parts. It has a lower part made of electrically conductive material (e.g. metal) which is firmly connected to a cover part made of likewise electrically conductive material (e.g. metal) with an insulating film in between.
  • the temperature-dependent switching mechanism arranged in the switch housing has a spring washer to which a movable contact part is attached, as well as a bimetallic disc which is slipped over the movable contact part.
  • the spring washer presses the movable contact part against a stationary counter contact which is arranged on the inside of the switch housing on the cover part.
  • the outer edge of the spring washer is supported in the lower part of the switch housing so that the electrical current flows from the lower part through the spring washer and the movable contact part into the stationary counter contact and from there into the cover part.
  • the temperature-dependent switching behavior of the switch is primarily due to the temperature-dependent bimetallic disc.
  • This is usually a multi-layer, active, sheet-metal component consisting of two, three, or four interconnected components with different thermal expansion coefficients.
  • the connection between the individual layers of metals or metal alloys in such bimetallic discs is usually materially bonded or positively bonded, achieved, for example, by rolling.
  • Such a bimetallic disc exhibits a first stable geometric configuration (low-temperature configuration) at low temperatures, below the response temperature of the bimetallic disc, and a second stable geometric configuration (high-temperature configuration) at high temperatures, above the response temperature of the bimetallic disc. Depending on the temperature, the bimetallic disc jumps from its low-temperature configuration to its high-temperature configuration in a hysteresis-like manner.
  • the bimetal disc If the temperature of the bimetal disc rises above its response temperature due to a temperature increase in the device to be protected, it switches from its low-temperature configuration to its high-temperature configuration.
  • the bimetal disc then works against the spring washer to lift the moving contact part from the stationary counter-contact, causing the switch to open and the device to be protected to be switched off and prevent it from heating up further.
  • the bimetal disc snaps back into its low-temperature configuration so that the switch is closed again as soon as the temperature of the bimetal disc drops below the so-called return temperature of the bimetal disc as a result of the cooling of the device to be protected.
  • the bimetal disc is mounted in its low-temperature configuration in the switch housing without mechanical forces, and the bimetal disc is not used to conduct the current.
  • This has the advantage that the bimetal disc has a longer service life and that the switching point, i.e., the response temperature of the bimetal disc, does not change even after many switching cycles.
  • the bimetallic disc is therefore preferably inserted into the switch housing as a loose component during manufacture.
  • the bimetallic disc for example, is placed over the contact part attached to the spring washer via a central through hole provided therein. Only when the switch housing is closed is the bimetallic disc then fixed in place and its position relative to the other components of the switching mechanism determined.
  • the production of such a switch, in which the bimetallic disc is inserted individually has proven to be cumbersome, as several steps are necessary to insert the switching mechanism into the switch housing.
  • the bimetal disc is therefore already connected (outside the housing) to the contact part attached to the spring washer.
  • the bimetal disc is slipped over the contact part and An upper collar of the contact part is then folded over.
  • the spring washer attached to the contact part, but the bimetallic disc is also held captive to it.
  • the switch mechanism consisting of the bimetallic disc, the spring washer, and the contact part, can thus be manufactured in advance as a semi-finished product, forming a captive unit that can be stored separately as bulk material. During switch manufacturing, the switch mechanism can then be inserted into the switch housing as a captive unit in a single step. This greatly simplifies switch production.
  • the spring washer is in the DE 10 2011 119 632 B3
  • Known switches are welded or soldered to the contact part in order to create the best possible electrical contact between the two components.
  • the switchgear is prefabricated as a semi-finished product and stored in bulk, the welded or soldered connection between the contact part and the spring washer can break. Such defective switches can then no longer be used.
  • a particular problem is that such a defect can only be detected after the switch has been assembled, since only then is a functional test of the switchgear possible.
  • the bimetallic disc, the spring washer, and the contact part form a captive unit even before installation in the switch housing. This unit can be inserted into the switch housing as a whole during production of the switch and can be stored in bulk in advance.
  • the contact part has a casing made of softer metal and a core made of electrically conductive, harder metal.
  • the bimetallic disc and the spring washer are plugged onto the casing and molded into the softer metal of the casing.
  • this type of connection often leads to the bimetallic disc and/or the spring washer becoming unintentionally detached from the contact part during storage of the switching mechanism.
  • the captive unit of the switching mechanism is achieved by connecting the bimetallic disc and the spring disc with a rivet.
  • this rivet can also form the movable contact part of the switching mechanism.
  • the rivet is constructed in two parts and has a rivet bolt that interacts with a hollow rivet or a rivet bolt with an attached counterholder. While this type of rivet connection between the spring disc and bimetallic disc has proven to be a mechanically long-lasting connection, the rivet connection has other disadvantages.
  • the bimetallic disc is usually clamped firmly to the rivet, which can lead to deformation and thus malfunctions of the bimetallic disc.
  • Storage of the switching mechanism in bulk form is therefore fundamentally possible.
  • damage to the switching mechanism during bulk storage cannot be ruled out.
  • the switching mechanism which can be pre-produced as a semi-finished product, should then also be as easy to use as possible in a temperature-dependent switch and enable its production with as few work steps as possible. Furthermore, the electrical contact between the switching mechanism and the external terminals of the switch should be improved.
  • the switching mechanism comprises an additional retaining ring, which acts as a kind of switching mechanism housing and surrounds the spring washer circumferentially, holding it captive. Since the spring washer and the bimetallic washer are also captive to the electrically conductive contact part, the aforementioned components of the switching mechanism—i.e., the bimetallic washer, the spring washer, and the contact part—are all captive (directly or indirectly) held to the retaining ring.
  • the switching mechanism can thus be pre-produced as a captive unit and is suitable for bulk storage.
  • the retaining ring surrounds the peripheral edge of the spring washer and holds the spring washer captive, the retaining ring protects the free, peripheral edge of the spring washer. This is particularly advantageous during bulk storage of the switchgear.
  • the retaining ring is made of an electrically conductive material (e.g., metal), it also simplifies the electrical contacting of the derailleur.
  • the retaining ring itself can act as an electrical contact.
  • the temperature-dependent switching mechanism simply needs to be inserted into a switch housing, and the retaining ring must be brought into electrical contact with one of the switch's two external terminals. In the simplest case, this can be achieved by surface contact, in which the switching mechanism according to the invention, with the retaining ring, is placed on a contact surface arranged in the switch housing.
  • the switching mechanism according to the invention can initially be pre-produced as a semi-finished product and then inserted as a whole into a switch housing. This not only Not only the positioning of the switchgear, but also the production of the temperature-dependent switch and the electrical contacting of the switchgear are simplified many times over.
  • the housing of the temperature-dependent switch can be constructed much more simply than before. Essentially, only two external terminals need to be provided on the switch housing, which are electrically connected to each other via the switching mechanism according to the invention.
  • a temperature-dependent switch which has a temperature-dependent switching mechanism and a switch housing surrounding the switching mechanism, wherein the temperature-dependent switching mechanism is designed to switch, depending on its temperature, between a closed position in which the switching mechanism establishes an electrically conductive connection between a first external terminal and a second external terminal, and an open position in which the temperature-dependent switching mechanism separates the electrically conductive connection.
  • a clamping element is arranged in the base body and the circumferential edge of the spring washer is arranged between the clamping element and the base body.
  • the clamping element is preferably an annular clamping element that contacts the circumferential edge of the spring washer along its entire circumference and clamps it between itself and the base body of the retaining ring.
  • the clamping connection created by the clamping element preferably does not result in high contact pressure, but rather ensures loose clamping of the spring washer (with play) or at least clamping with a comparatively low clamping force on the spring washer. It is only important that the spring washer is held captive on the retaining ring and that electrical contact is established between the retaining ring and the spring washer. A clamping arrangement with an excessively high clamping force should, however, be avoided in order to prevent deformation of the spring washer.
  • the clamping element is made of an electrically insulating material, e.g. plastic.
  • the retaining ring does not touch the bimetallic disc. Instead, the retaining ring leaves a peripheral edge of the bimetallic disc freely accessible, at least from an upper side of the bimetallic disc.
  • the bimetallic disc is thus only indirectly held captively to the retaining ring via the contact part, but has no direct contact with it.
  • the mobility of the bimetallic disc is preferably not restricted by the retaining ring in either the closed or open position of the switch.
  • the retaining ring surrounds the circumferential edge of the spring washer at least partially from a circumferential side of the spring washer, an upper side of the spring washer running transversely to the circumferential side and an underside of the spring washer opposite the upper side.
  • the retaining ring completely surrounds the circumferential side of the spring washer, while only partially surrounding the top and bottom of the spring washer, namely in the area of the circumferential edge of the spring washer.
  • the retaining ring is designed to be relatively compact, so that it hardly increases the size of the switching mechanism itself compared to commercially available temperature-dependent switching mechanisms of this type. Since, as already mentioned, the additional retaining ring eliminates components on the switch housing and allows for a simpler switch housing design, the retaining ring also does not increase the size of the entire switch.
  • the circumferential edge of the spring washer is clamped in the retaining ring.
  • Attaching the spring washer to the retaining ring is therefore incredibly simple.
  • the clamping connection between the retaining ring and the spring washer ensures a mechanically stable connection of the switching unit, which is captively held together by the bimetallic disc, spring washer, contact element, and retaining ring.
  • the base body of the retaining ring extends around a central axis and defines a receiving pocket open towards the central axis, in which the clamping element and the circumferential edge of the spring washer are arranged.
  • This receiving pocket preferably runs at least along a circumferential section of the retaining ring.
  • the receiving pocket thus extends at least partially around the central axis of the base body of the retaining ring.
  • the receiving pocket can also extend all the way around, i.e., along the entire circumference around the central axis.
  • the receiving pocket is preferably substantially U- or J-shaped in cross-section.
  • U-shaped specifically means that the receiving pocket, viewed in cross-section, is formed by two parallel or substantially parallel legs connected by a transverse leg.
  • the two parallel or substantially parallel legs do not necessarily have to be the same length (hence the term J-shaped).
  • the receiving pocket formed by the base body of the retaining ring can have a "square" or "round” U- or J-shaped cross-section.
  • the pocket formed by the base body of the retaining ring allows for very easy installation of the rear derailleur.
  • the base body can be The clamping element can be bent around, and the spring washer can be subsequently positioned between the clamping element and the base body of the retaining ring.
  • the base body can be manufactured first, and the clamping element and spring washer can be inserted into it together or one after the other.
  • the base body of the retaining ring is preferably designed to be rotationally symmetrical.
  • the base body of the retaining ring is preferably a rotational body.
  • the base body is preferably designed as a single piece, i.e., as an integral component.
  • the bimetallic disc and the spring disc are arranged one above the other in a height direction, wherein a height of the contact part measured in the height direction is greater than a height of the retaining ring measured in the height direction.
  • the retaining ring is therefore very flat and therefore does not contribute at all, or only very slightly, to increasing the overall height of the switch.
  • the contact part is arranged centrally relative to the retaining ring and protrudes from it at least on a first side.
  • the retaining ring defines a central through-hole around which the base body of the retaining ring extends and in which the remaining components of the switching mechanism (bimetallic disc, spring washer, and contact part) are arranged. Due to the low height of the retaining ring, the contact part protrudes from it at least on a first side, and in some cases also on a second opposite side.
  • the retaining ring therefore does not restrict the spatial accessibility of the contact part. Accordingly, the electrical contacting of the contact part is not restricted by the retaining ring.
  • the contact part is surrounded by two opposing sides, i.e. accessible from its top and bottom, and is not surrounded by the retaining ring on these sides.
  • an inner diameter of the base body of the retaining ring is smaller than an outer diameter of the spring washer, but larger than an outer diameter of the bimetallic washer.
  • the mentioned inner and outer diameters respectively refer to a dimension of the retaining ring or the bimetallic disc or the spring disc, which is measured transversely, preferably perpendicularly to the height direction.
  • the contact part has a first component and a second component fastened to the first component, wherein a centrally arranged inner edge of the spring washer is clamped between the first and the second component, and wherein a centrally arranged inner edge of the bimetallic disc is arranged between the second component and the spring washer.
  • the contact part is therefore preferably constructed in two parts. While the spring washer is clamped between the two components of the contact part with its inner edge, the inner edge of the bimetallic disc is positioned between the inner edge of the spring washer and the second component and has some play. This, in turn, has a positive effect on the service life of the bimetallic disc, as it can be mounted without force in the closed position of the switch.
  • the present invention relates not only to the temperature-dependent switching mechanism, but also to a temperature-dependent switch in which the temperature-dependent switching mechanism according to the invention is used. It is therefore understood that the features of the above-mentioned embodiments as well as those in the The features defined in the dependent claims relating to the temperature-dependent switching mechanism also relate in the same or equivalent manner to the temperature-dependent switch according to the invention.
  • the switch housing has a lower part and a cover part fastened to the lower part and closing the lower part, wherein the lower part and the cover part are made of electrically insulating material.
  • the base and cover are both made of plastic. This offers a significant cost advantage compared to metal switch housing components.
  • the switch housing from electrically insulating material is possible, among other things, because the retaining ring of the switching mechanism is made of electrically conductive material and can thus function as an electrode of the switch or switching mechanism.
  • the retaining ring of the switching mechanism is made of electrically conductive material and can thus function as an electrode of the switch or switching mechanism.
  • at least one part of the switch housing or even both parts of the switch housing typically function as the electrode(s), so the corresponding part of the switch housing must then be made of electrically conductive material.
  • the retaining ring forms a first electrode, wherein the lower part carries the first electrode and a second electrode electrically connected to the second external terminal and keeps the two electrodes at a distance from one another along a height direction, wherein the first electrode is electrically connected to the first external terminal via a line connection element arranged in the lower part and aligned transversely to the two electrodes, and wherein the first and the second external terminal are guided through the lower part at the same height with respect to the height direction.
  • the cable connection element provided inside the switch housing according to this embodiment which electrically connects the retaining ring acting as the first electrode to the first external terminal within the switch, allows the two external terminals to be routed through the base at the same height, even though the two electrodes are arranged at a different height inside the switch. Arranging the two external terminals at the same height significantly simplifies the electrical connection of the switch.
  • the line connection element is preferably a separate component that acts as an electrical conductor carrier between the first electrode and the first external terminal. It is electrically connected internally to the first electrode, i.e., the retaining ring, and to the first external terminal.
  • it can be a conductive plate arranged in the lower part of the switch housing and located between the first electrode and the first external terminal.
  • the retaining ring rests on the line connecting element.
  • the electrical connection of the switchgear is thus extremely simple: the switchgear is inserted into the lower part of the switch housing in such a way that the retaining ring rests on the cable connection element. This contact creates a surface contact between the retaining ring and the cable connection element, ensuring a good and lasting contact of the switchgear.
  • the bimetallic disc is designed to change its shape depending on its temperature in order to switch the switching mechanism between the closed position and the open position, wherein the spring disc is designed to establish the electrically conductive connection in the closed position of the switching mechanism by being supported on the retaining ring and generating a mechanical contact pressure with which the contact part is pressed against a stationary counter-contact.
  • the retaining ring thus serves as the first electrode of the switching mechanism.
  • the stationary mating contact serves as the second electrode of the switching mechanism or is located on the second electrode of the switching mechanism.
  • the current flows through the retaining ring, the spring washer, the contact element, and the stationary mating contact.
  • the bimetallic disc In the closed position of the switch, however, the bimetallic disc is de-energized. This, in turn, has a positive effect on the service life of the bimetallic disc and thus on the service life of the switching mechanism.
  • Fig. 1 and 2 Each shows a schematic sectional view of an embodiment of a temperature-dependent switch according to the invention, in which a switching mechanism according to the invention is used.
  • the switch is designated in its entirety by the reference numeral 10.
  • Fig. 1 shows the closed position of switch 10.
  • Fig. 2 shows the open position of switch 10.
  • the switch 10 has a temperature-dependent switching mechanism 12 according to the invention.
  • the switching mechanism 12 is configured to switch the switch 10 from its closed position to its open position and vice versa depending on its temperature.
  • the switching mechanism 12 In the Fig. 1 In the closed position of the switch 10 shown, the switching mechanism 12 establishes an electrically conductive connection between the two external terminals 14, 16 of the switch 10. In the Fig. 2 In the open position of the switch 10 shown, however, the switching mechanism 12 separates the electrically conductive connection between the first external terminal 14 and the second external terminal 16.
  • the temperature-dependent switching mechanism 12 comprises a temperature-dependent bimetallic disc 18, a temperature-independent spring disc 20, a movable contact part 22, and a retaining ring 24.
  • the aforementioned components 18-24 of the switching mechanism 12 are captively connected to one another.
  • the spring washer 20 has a central hole through which the contact part 22 passes.
  • the inner edge 26 of the spring washer 20 is clamped to the contact part 22.
  • the contact part 22 is constructed in two parts and has a first component 28, which forms the main body of the contact part 22, and a second component 30, which is designed as a type of circumferential shoulder and is firmly connected to the first component 28 of the contact part 22.
  • the spring washer 20 is clamped with its inner edge 26 between the first component 28 and the second component 30 of the contact part 22.
  • the circumferential edge 32 of the spring washer 20 is held captively on the retaining ring 24.
  • the retaining ring 24 has a base body 34 and a clamping element 36 arranged in the base body 34.
  • the base body 34 of the retaining ring 24 is made of metal or another electrically conductive material.
  • This base body 34 is a rotationally symmetrical body that extends around a central axis 38 and forms a type of receiving pocket 40 in which the clamping element 36 and the circumferential outer edge 32 of the spring washer 20 are arranged.
  • the receiving pocket 40 formed by the base body 34 of the retaining ring 24 is, as shown in Fig. 1 and 2 shown, open toward the central axis 38 and substantially U- or J-shaped in cross-section.
  • the receiving pocket 40 formed by the base body 34 of the retaining ring 24 extends at least partially along the retaining ring 24. It may, but does not necessarily have to, run along the entire circumference of the retaining ring 24, as explained in more detail below.
  • the clamping element 36 is preferably a spacer ring, which is designed as a rotating body and is adapted to the shape of the retaining ring or the shape of the receiving pocket 40 formed by the base body 34. This spacer ring is preferably fitted precisely into the receiving pocket 40.
  • the spacer ring or the clamping element 36 is preferably made of an electrically insulating material, e.g., plastic.
  • the bimetal disc 18 While the spring washer 20 is clamped with its circumferential edge 32 between the base body 34 and the clamping element 36 of the retaining ring 24 and is clamped with its inner edge 26 to the contact part 22, the bimetal disc 18 is in the Fig. 1 shown closed position of the switching mechanism 12, it is mounted largely force-free.
  • the bimetallic disc 18 is arranged with its inner edge 42 between the second component 30 of the contact part 22, which is designed as a circumferential shoulder, and the spring washer 20. Due to this type of arrangement, the bimetallic disc 18 is held captive on the contact part 22, but with play.
  • the circumferential edge 44 projects into the interior of the switch and has no contact with the retaining ring 24 or with the switch housing 46 in which the switching mechanism 12 is arranged.
  • the circumferential edge 44 of the bimetallic disc 18 is thus freely accessible at least from the top side and is not covered by the retaining ring 24 from this side.
  • an inner diameter d 1 of the base body 34 of the retaining ring 24 is smaller than an outer diameter D 1 of the spring washer 20, but larger than an outer diameter D 1 of the bimetallic disc 18. This ensures that the spring washer 20 is held captively on the retaining ring 24 and cannot accidentally detach itself from it. On the other hand, this ensures that the bimetallic disc 18 does not collide with the retaining ring 24 during its temperature-dependent movement.
  • the base body 34 of the retaining ring 24 is designed as a single piece. It has a top wall 54, a bottom wall 56 integrally connected to the top wall 54 and running parallel thereto, and a side wall 58 running transversely to the top wall 54 and the bottom wall 56.
  • the side wall 58 connects the top wall 54 to the bottom wall 56 and is integrally connected to both.
  • top wall 54 and the bottom wall 56 of the base body 34 of the retaining ring 24 do not necessarily have to run all the way around. It is generally possible for the top wall 54 to run along the entire circumference of the base body 34 of the retaining ring 24. However, to avoid creases, it is advantageous if the top wall 54 of the base body 34 of the retaining ring 24 has several separate, bent segments 60 distributed in the circumferential direction, as shown in the plan view in Fig. 4 is shown.
  • the switching mechanism 12 is inserted as a whole into the switch housing 46 during the manufacture of the switch 10.
  • This switch housing 46 has a pot-shaped lower part 62, which is closed by a separately designed cover part 64.
  • the lower part 62 and the cover part 64 are made of electrically insulating material, e.g., plastic.
  • the upper edge 66 of the lower part 62 is stamped onto the cover part in a vacuum-tight manner.
  • the switch housing 46 itself does not serve for the electrical connection of the switching mechanism 12. Instead, the base body 34 of the retaining ring 24, which is made of electrically conductive material, functions as the first electrode 68.
  • a second electrode 70 is embedded in the lower part 62 of the switch housing 46. This second electrode 70 is integrally connected to the second external connection 16.
  • the second electrode 70 can, for example, be a metal sheet that is directly integrated into the lower part 62 of the switch housing 46.
  • the lower part 62 is manufactured as a plastic injection-molded part by overmolding the second electrode 70 during the manufacture of the switch 10.
  • the two electrodes 68, 70 of the switching mechanism 12 are held at a distance from each other in the vertical direction h by the lower part 62 of the switch housing 46.
  • the retaining ring 24 rests on a shoulder 72 formed inside the lower part and is simultaneously connected to a line connecting element 74 which is electrically connected to the first External terminal 14 is connected in surface contact.
  • This cable connection element 74 can be, for example, a cable plate or other electrical conductor that is integrated into the lower part 62 of the switch housing 46.
  • the line connecting element 74 electrically connects the base body 34 of the retaining ring 24, which functions as the first electrode 68 of the switching mechanism 12, to the first external terminal 14.
  • the first external terminal 14 is accordingly in the Fig. 1 and 2 shown sectional views "behind" the second external connection 16, since the first external connection 14 is arranged at the same height as the second external connection 16 and runs parallel to the second external connection 16. The latter is particularly evident when viewed in conjunction with the Fig. 3 shown top view of the switch 10.
  • the spring washer 20 In the closed position or low-temperature position of the switch 10 shown, the spring washer 20 is in its first configuration and the bimetallic disc 18 is in its low-temperature configuration. If, in this situation, the temperature of the device to be protected and thus the temperature of the switch 10 and the temperature of the bimetallic disc 18 increases to the response temperature of the bimetallic disc 18 or above this response temperature, the bimetallic disc 18 snaps from its Fig. 1 shown convex low-temperature position into its concave high-temperature position, which is Fig. 2 As shown, the bimetallic disc 18 rests with its outer edge 44 on the spring disc 20. As a result, the spring disc 20 bends upwards at its center, so that the spring disc 20 is released from its Fig. 1 shown, first stable geometric configuration into its Fig. 2 shown, snaps into the second geometrically stable configuration. This lifts the contact part 22 from the mating contact 76 and interrupts the electrically conductive connection between the two external terminals 14, 16.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
EP25156933.1A 2023-01-31 2024-01-19 Mécanisme de commutation dépendant de la température et commutateur dépendant de la température Pending EP4528772A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023102304.7A DE102023102304B4 (de) 2023-01-31 2023-01-31 Temperaturabhängiges Schaltwerk und temperaturabhängiger Schalter
EP24152794.4A EP4411778A1 (fr) 2023-01-31 2024-01-19 Mécanisme de commutation dépendant de la température et commutateur dépendant de la température

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EP4528772A2 true EP4528772A2 (fr) 2025-03-26
EP4528772A3 EP4528772A3 (fr) 2025-06-04

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EP24152794.4A Pending EP4411778A1 (fr) 2023-01-31 2024-01-19 Mécanisme de commutation dépendant de la température et commutateur dépendant de la température
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US (1) US20240258054A1 (fr)
EP (2) EP4411778A1 (fr)
JP (1) JP2024109104A (fr)
CN (1) CN118471734A (fr)
DE (1) DE102023102304B4 (fr)

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Publication number Priority date Publication date Assignee Title
DE2917482A1 (de) 1979-04-30 1980-11-06 Hofsass P Waermeschutzschalter
DE19919648A1 (de) 1999-04-30 2000-12-07 Marcel Hofsaess Gerät mit in einer Tasche vorgesehenem temperaturabhängigen Schaltwerk
DE102007014237A1 (de) 2007-03-16 2008-09-18 Hofsaess, Marcel P. Temperaturabhängiger Schalter und dafür vorgesehenes Schaltwerk
DE102011119632B3 (de) 2011-11-22 2013-04-11 Marcel P. HOFSAESS Temperaturabhängiges Schaltwerk
DE102013102089A1 (de) 2013-03-04 2014-09-04 Marcel P. HOFSAESS Temperaturabhängiger Schalter mit Isolierscheibe

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DE19527253B4 (de) * 1995-07-26 2006-01-05 Thermik Gerätebau GmbH Nach dem Baukastenprinzip aufgebauter Temperaturwächter
DE19527254C2 (de) * 1995-07-26 2000-01-20 Thermik Geraetebau Gmbh Temperaturwächter
DE19609577C2 (de) * 1996-03-12 1998-02-19 Thermik Geraetebau Gmbh Schalter mit einem temperaturabhängigen Schaltwerk
US6069551A (en) * 1997-05-02 2000-05-30 Therm-O-Disc, Incorporated Thermal switch assembly
DE19847208C2 (de) * 1998-10-13 2002-05-16 Marcel Hofsaes Schalter mit einem Isolierstoffträger
CN102007561B (zh) * 2008-04-18 2014-07-02 泰科电子日本合同会社 电路保护装置
DE102012112487A1 (de) * 2012-12-18 2014-06-18 Thermik Gerätebau GmbH Temperaturschutzschaltung
DE102013109291A1 (de) * 2013-08-27 2015-03-05 Thermik Gerätebau GmbH Temperaturabhängiger Schalter mit am Rand eingeklemmter Schnappscheibe
DE102013017232A1 (de) * 2013-10-17 2015-04-23 Thermik Gerätebau GmbH Temperaturabhängiges Schaltwerk
DE102014108518A1 (de) * 2014-06-17 2015-12-17 Thermik Gerätebau GmbH Temperaturabhängiger Schalter mit Distanzring
JP2016096119A (ja) * 2014-11-17 2016-05-26 株式会社小松ライト製作所 ブレーカー及びそれを備えた安全回路並びに２次電池回路。
DE102019125452B4 (de) * 2019-09-20 2021-04-22 Marcel P. HOFSAESS Temperaturabhängiger Schalter
DE102019125451B4 (de) * 2019-09-20 2021-04-08 Marcel P. HOFSAESS Temperaturabhängiger Schalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2917482A1 (de) 1979-04-30 1980-11-06 Hofsass P Waermeschutzschalter
DE19919648A1 (de) 1999-04-30 2000-12-07 Marcel Hofsaess Gerät mit in einer Tasche vorgesehenem temperaturabhängigen Schaltwerk
DE102007014237A1 (de) 2007-03-16 2008-09-18 Hofsaess, Marcel P. Temperaturabhängiger Schalter und dafür vorgesehenes Schaltwerk
DE102011119632B3 (de) 2011-11-22 2013-04-11 Marcel P. HOFSAESS Temperaturabhängiges Schaltwerk
DE102013102089A1 (de) 2013-03-04 2014-09-04 Marcel P. HOFSAESS Temperaturabhängiger Schalter mit Isolierscheibe

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Publication number Publication date
US20240258054A1 (en) 2024-08-01
JP2024109104A (ja) 2024-08-13
EP4528772A3 (fr) 2025-06-04
DE102023102304B4 (de) 2024-08-08
DE102023102304A1 (de) 2024-08-01
EP4411778A1 (fr) 2024-08-07
CN118471734A (zh) 2024-08-09

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