EP3229255B1 - Commutateur thermique - Google Patents

Commutateur thermique Download PDF

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Publication number
EP3229255B1
EP3229255B1 EP17172229.1A EP17172229A EP3229255B1 EP 3229255 B1 EP3229255 B1 EP 3229255B1 EP 17172229 A EP17172229 A EP 17172229A EP 3229255 B1 EP3229255 B1 EP 3229255B1
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EP
European Patent Office
Prior art keywords
plunger
temperature
snap
spring element
spring
Prior art date
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Active
Application number
EP17172229.1A
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German (de)
English (en)
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EP3229255A1 (fr
Inventor
Marcel P. Hofsaess
Hans-Christian Liehr
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
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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
    • H01H37/32—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
    • 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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • 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
    • H01H2037/549—Details of movement transmission between bimetallic snap element and contact
    • 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
    • H01H37/5418—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting using cantilevered bimetallic snap elements

Definitions

  • the present invention relates to a temperature-dependent switch with a first and a second external connection, the first and second external connection being fixed to an insulator body, the first and second external connection being designed as a first or second connection plate, the two connection plates protruding from the insulator body, and the insulator body is arranged in a housing, having a stationary contact part which is electrically conductively connected to the first external connection, a movable contact part which cooperates with the stationary contact part and is fastened to a spring part which is electrically conductively connected to the second external connection, and which the movable contact part presses against the stationary contact part, a bimetallic part and a plunger arranged between the bimetallic part and the spring part, the bimetallic part exerting compressive forces on the spring part via the plunger when a switching temperature is exceeded and dadu rch the movable contact part lifts off the stationary contact part, and wherein the spring part has a first and a second leg, the movable contact part is fixed to the first
  • Such a switch is from EP 2 511 930 A1 known.
  • the well-known switch is a temperature protection switch, in which the switching movement of a bimetallic disc transmits compressive forces via a plunger to a current-carrying spring part, which acts as a closing spring here.
  • the closing spring carries a movable contact part which presses it against a stationary contact part when the switch is closed.
  • the stationary contact part and closing spring are each connected to a connecting plate.
  • the two connecting plates are fixed to an insulator body, from which they protrude laterally.
  • the temperature protection switch has a flat housing from which the two connection plates protrude as external connections.
  • Such temperature-dependent switches are used in a known manner to protect electrical devices from overheating.
  • the switch is electrically connected in series with the device to be protected via its two external connections and is mechanically arranged on the device in such a way that it is thermally connected to it.
  • a temperature-dependent switching mechanism consisting of a spring snap-action disc, a bimetallic snap-action disc and a movable contact part is arranged in a housing, which when the switch is closed is in contact with a stationary contact part on the inside of the upper part, which is plated through to a first connection on the upper part on the outside.
  • the conductive lower part serves as the second connection.
  • the operating current of the device to be protected flows through the two contact parts and the spring snap-in disc into the lower part.
  • the one from the DE 44 28 226 C1 known switch is provided with a heating resistor which is electrically arranged in series with the external connections and ensures a current-dependent switching function.
  • the operating current of the device to be protected thus flows constantly through this heating resistor, which can be dimensioned in such a way that when a certain operating current is exceeded, it ensures that the bimetallic snap-action disc is heated to a temperature above its response temperature, so that the switch opens at an increased operating current before the device to be protected has overheated.
  • the circuit is closed and the device to be protected is supplied with power via the switch. If the temperature rises above a permissible value, either as a result of an excessively high operating current or as a result of the device to be protected being overheated, the bimetal snap-action disc deforms, causing the spring snap-action disc to move from its first stable geometric configuration in which it holds the moving contact part presses against the stationary contact part, jumps into its second stable geometric configuration, in which it lifts the movable contact part from the stationary contact part. The switch is opened and the power supply to the device to be protected is interrupted.
  • the now de-energized device can then cool down again.
  • the switch that is thermally coupled to the device also cools down again and then closes again automatically. While such a switching behavior can make sense to protect e.g. a hair dryer, this is not desirable wherever the device to be protected must not be switched on again automatically after it has been switched off in order to avoid damage. This applies, for example, to electric motors that are used as drive units.
  • a so-called self-holding resistor is therefore often provided, which is electrically parallel to the connections, as is also the case in DE 44 28 226 C1 is described.
  • the self-holding resistor When the switch is open, the self-holding resistor is electrically in series with the device to be protected, through which only a harmless residual current flows because of the resistance value of the self-holding resistor.
  • this residual current is sufficient to heat up the self-holding resistor to such an extent that it radiates heat that keeps the bimetallic snap-action disk at a temperature above its switching temperature.
  • the temperature-dependent switching mechanism can also only include a bimetallic snap-action disc, which carries the movable contact part and thus carries the operating current.
  • the rear derailleur can also include a bimetallic spring tongue, as in the DE 198 16 807 A1 is described. At its free end, this bimetallic spring tongue carries a movable contact part which interacts with a stationary mating contact. The stationary mating contact is electrically connected to the first terminal, with the second terminal being electrically connected to the clamped end of the bimetal spring tongue.
  • the bimetallic spring tongue conducts the operating current of the electrical device to be protected.
  • a current transmission element in the form of a contact bridge or a contact plate is often used, which is moved by a spring part and carries two contact parts which interact with two stationary mating contacts; see for example the DE 26 44 411 A1 .
  • 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 this to the second contact part and from there into the second mating contact.
  • the spring part is thus de-energized. It is also known to use the spring part itself, for example a bimetal snap-action disc or a spring snap-action disc working against a bimetal part, as a contact bridge which carries the operating current.
  • the known switches must be able to reliably protect motors both in limit operation at maximum permissible power and when the rotor is locked. Two tests are usually carried out to check whether the switch is capable of doing this.
  • the motor is connected to the operating voltage when the rotor is locked, which means that an operating current flows through the motor that is three to five times higher than the usual operating current.
  • the switch In addition to good thermal coupling, the switch must also meet the required number of switching cycles, which should be at least 3,000 for typical requirements as described above.
  • the bimetallic disc is also arranged in a recess on an outside of the insulator body in order to thermally decouple it from the current-carrying closing spring on the one hand and to enable good thermal coupling of the bimetallic disc to the device to be protected on the other.
  • the temperature-dependent switching mechanism used in the known switch is in principle constructed like a so-called thermostat switch, which is used to regulate the temperature of a device equipped with it, for example a heating plate to regulate the temperature.
  • thermostatic switches can be found in the following intellectual property rights: DE 31 36 312 A1 , DE 196 37 706 A1 , US 3,972,016A , US 4,669,182A , US 5,059,937A and U.S. 2004/0066269 A1 .
  • the US 3,931,603A shows a temperature monitor with bimetal snap-action disc, spring washer and contact bridge.
  • a bolt acts between the bimetal snap-action disc and the spring washer, one end of which is attached to the bimetal snap-action disc.
  • the spring washer is located at the other end of the bolt, with a contact bridge being arranged on the bolt between the spring washer and the bimetallic snap-action disk and a compression spring being arranged between the contact bridge and the bimetallic snap-action disk.
  • the bimetallic snap-action disc presses the bolt in the direction of two stationary mating contacts, against which the contact bridge rests under the force of the compression spring, which is supported on the bimetallic snap-action disc at the other end.
  • the DE 26 25 102 A also shows a temperature-dependent switch with bimetallic snap-action disc, spring snap-action disc and contact bridge, in which a plunger is connected at one end to the spring snap-action disc and at its other end to the contact bridge, which interacts with two stationary mating contacts.
  • a bimetallic snap-action disk On the side of the spring snap-action disk remote from the plunger, a bimetallic snap-action disk is arranged, which lies loosely below the spring snap-action disk below its switching temperature, so that the switch is closed.
  • a switching plunger is provided above the contact bridge and is arranged on an actuating button via a second bistable spring snap-action disk.
  • the switching plunger presses against the contact bridge when the switch is open.
  • the actuating force of the second spring snap-action disc is less than the sum of the actuating forces of the first spring snap-action disc and the bimetal snap-action disc, so that when the actuating button is pressed into the housing, the second spring snap-action disc snaps into its inactive position when the bimetal Snap disk is above its switching temperature.
  • a temperature-dependent switch in which a bimetallic snap-action disc acts via a plunger on a switching arm which carries a movable contact part at its free end which interacts with a stationary counter-contact.
  • the bimetallic snap disk is secured by a spring washer on a shoulder of the temperature sensitive switch housing.
  • the spring washer enables the bimetal snap-action disc to snap over and dampens the movement of the bimetal snap-action disc during switching processes and is intended to improve the heat exchange between the bimetal snap-action disc and the housing.
  • a temperature-dependent switch in which a bimetallic disc, when its response temperature is exceeded, exerts a tensile force on a spring arm that presses a movable contact part against a stationary contact, thereby lifting the movable contact part from the stationary contact.
  • a temperature-dependent switch in which a bimetallic disc, when its response temperature is exceeded, exerts a tensile force on a spring arm which presses a movable contact part against a stationary contact, thereby lifting the movable contact part from the stationary contact.
  • a temperature-dependent switch in which a bimetal disc, when its response temperature is exceeded, exerts a compressive force on a spring arm which presses a movable contact part against a stationary contact, thereby lifting the movable contact part from the stationary contact.
  • this object is achieved with the switch mentioned at the outset in that the tappet is arranged between the spring part and the bimetallic part in such a way that it transmits compressive and tensile forces from the bimetallic part to the spring part.
  • the plunger in contrast to the known switch, now transmits the movement of the bimetal part to the spring part not only when the switch is opened but also when the switch is closed, the closing speed is increased, which according to the invention is no longer determined only by the spring part, i.e. the closing spring .
  • the inventors of the present application did not take the suggested route of influencing the formation of the arc itself or redesigning the spring part, but instead increased the switching dynamics of the known switch by providing a forced coupling between the closing spring and the bimetallic part.
  • This forced coupling is achieved in a structurally simple and inexpensive manner in that the plunger not only transmits a compressive force from the bimetal part to the spring part when opening in a known manner, but also transmits a tensile force from the bimetal part to the spring part when closing.
  • This measure increases the closing speed of the switch, which, contrary to expectations, already significantly reduces contact wear, especially when switching high currents, which, according to the inventor of the present application, already significantly increases the service life, ie the number of switching cycles.
  • the actuating force of the spring part is not increased, but rather an additional closing force is applied by the bimetallic disc.
  • the opening speed of the switch is not negatively influenced, because when opening, the bimetallic disc only has to overcome the previous closing force of the spring part.
  • the switch comprises a spring snap-in part that transmits compressive and tensile forces to the spring part via the plunger.
  • the additional spring snap part not only further increases the closing speed, but also increases the opening speed.
  • the bimetal part first presses against the spring snap part until it suddenly snaps into its other configuration and works together with the actuating force of the bimetal part against the closing force of the spring part and opens the switch quickly.
  • the new switch withstands the required number of switching cycles even with high switching currents.
  • a “spring snap-in part” is understood to be a spring part that has two stable geometric configurations, as is generally known for spring snap-in disks in temperature-dependent switches.
  • the spring snap part is pushed by the bimetallic part from one of its geometrically stable configurations in the direction of the other until the spring snap part suddenly snaps over completely.
  • the switch can each be provided with a heating resistor for defined current-dependent switching and optionally also with a self-holding resistor so that the open switch does not cool down and closes again automatically.
  • the spring snap part and the bimetallic part are arranged at a first end of the plunger and the spring part at a second end of the plunger, the plunger preferably having a shank which has a tapered section at its first end, the opposite the tapered section carries a head that is widened, the bimetal part and optionally the spring snap-in part with their respective through hole being arranged on the tapered section in such a way that the bimetal part and the optionally provided spring snap-in part are held with play between the head and the shaft, and more preferably the tappet has a shank which has a tapered portion at its second end, which carries a head which is widened relative to the tapered portion, the spring part having a through hole being arranged on the tapered portion in such a way that the spring part has play between the head and the shaft is held.
  • the tapered portion may be integrally formed with the head or the shank, either by inserting the tapered portion into a blind hole provided in the well, or by fitting the head over the tapered portion.
  • the head can also be designed as a rivet, the bolt of which is inserted into a blind hole provided in the tapered section.
  • the bimetal part is designed as an elongated tongue which is arranged on its opposite narrow sides between two abutments which are opposite one another in the longitudinal direction of the plunger
  • the spring snap-in part is designed as an elongated tongue which is arranged on its opposite narrow sides in each case is arranged between two abutments which are opposite one another in the longitudinal direction of the plunger
  • the bimetal part is designed as a bimetal disc which is arranged at its edge between two abutments which are opposite one another in the longitudinal direction of the plunger
  • the spring snap-in part is a spring Snap disk is formed, which is arranged at its edge between two abutments, which are opposite in the longitudinal direction of the plunger.
  • a “disk” is understood to mean a generally round, circular, oval or rounded part.
  • the housing has an upper side and an underside that are connected to one another via narrow sides, and the housing has an opening on one of its narrow sides and is plugged onto the insulator body with this opening, more preferably the two legs for interrupting a conductive connection between the two connection plates of the ram are bent apart, more preferably the second leg rests against the second connection plate, more preferably the insulator body is composed of two part-bodies, and the two connection plates lie between the two part-bodies.
  • the bimetal part is arranged in a depression on an outside of the insulator body, more preferably the spring snap-in part is arranged in a depression on an outside of the insulator body, and finally a ring inserted from the outside is provided in the depression, which acts as an abutment is used for the spring snap part and/or the bimetallic part
  • the present invention also relates to a switch of the type mentioned at the outset, which has a spring snap-in part that presses the plunger against the spring part at least when the switching temperature is exceeded.
  • the spring snap-in part and the bimetallic part are preferably arranged at a first end of the plunger and the spring part is arranged at a second end of the plunger, with the spring snap-in part and the bimetallic part preferably being connected to the plunger in such a way that they transmit compressive and tensile forces to the plunger, More preferably, the plunger has a shaft which has a tapered section at its first end, which carries a head that is widened compared to the tapered section, the bimetal part and the spring snap-in part with their respective through hole being arranged on the tapered section in such a way that the bimetal part and the spring catch are held with play between the head and the shaft.
  • the bimetal part is arranged between the plunger and the spring snap-in part.
  • the advantage here is that the spring snap part is on the outside of the bimetal part and protects it.
  • the spring snap part is arranged between the plunger and the bimetallic part.
  • the external bimetallic part can be thermally well coupled to a device to be protected, it being also advantageous that even without forced coupling between the plunger and the bimetallic part as well as the spring snap-in part, the bimetallic part can retain the spring snap-in part lying above it in the direction of the plunger Opening the switch causes it to snap very quickly.
  • FIG. 1 shows a first exemplary embodiment of a very schematically illustrated temperature-dependent switch 10, which comprises a first and a second external connection 11, 12 and a switching mechanism 14, which establishes or opens an electrically conductive connection between the external connections 11, 12 depending on the temperature.
  • the switching mechanism 14 comprises a stationary contact part 15 which is electrically conductively connected to the first external connection 11 and a movable contact part 16 which interacts with the stationary contact part 15 and is attached to a spring part 17 which is electrically conductively connected to the second external connection 12 and acts as a closing spring , which presses the movable contact part 16 against the stationary contact part 15.
  • the spring part 17 is designed as a leaf spring which is fixed in the region of the second external connection 12 to a diagrammatically illustrated insulator body 18 to which the first external connection 11 and the stationary contact part 15 are also fixed.
  • the switching mechanism 14 further comprises a bimetal part 19 and a plunger 21 arranged between the bimetal part 19 and the spring part 17.
  • the spring part 17 and the bimetal part 19 are arranged at opposite ends 20a and 20b of the plunger 21.
  • the bimetallic part 19 presses the plunger 21 against the spring part 17 when a switching temperature is exceeded and thereby lifts the movable contact part 16 from the stationary contact part 15 .
  • the bimetallic part 19 is designed in the embodiment shown as an elongated tongue, which is arranged on its opposite narrow sides 22 and 23 with sufficient mechanical play for snapping between two opposite abutments 25, 26 in the longitudinal direction 24 of the plunger 21.
  • the upper abutments 25 are part of the insulator body 18, while the lower abutments 26 are designed as a fastening ring for the bimetal part 19.
  • the plunger 21 is connected to the spring part 17 and the bimetallic part 19 via an upper head 27 and a lower head 28 in tension and compression.
  • a tapered section 31 is provided between a shaft 29 of the plunger 21 and the lower head 28, on which the bimetallic part 17 sits with play.
  • the spring part 17 can also be fixed to the plunger 21 with play.
  • the head 27 and the head 28 are made wider than the tapered section 31 and the shaft 29, respectively.
  • the shank 29 of the plunger is guided in a through hole 30 arranged in the insulating part 18 in order to protect it from tilting and/or jamming.
  • the switch 10 is closed.
  • the spring part 17 presses the movable contact part 16 onto the stationary contact part 15 so that the circuit is closed between the two external terminals 11, 12 and the operating current of a device to be protected flows through the spring part 17.
  • the narrow sides 22, 23 of the bimetal part which is in its first geometric configuration, rest against the upper abutments 25 and thus support the closing pressure with which the movable contact part 16 is pressed onto the stationary contact part 15.
  • the bimetal part 17 folds over into its other geometric configuration in such a way that the narrow sides 22, 23 come into contact with the lower abutment 26, so that the bimetal part 17 pushes the plunger 21 in 1 up along the arrow 32 presses.
  • the plunger 21 pushes the spring part 17 upwards so that the movable contact part 16 is lifted off the stationary contact part 15 and the circuit is opened.
  • the temperature of the bimetal part 19 drops again, it jumps back into its first geometric configuration, which is shown in 1 is shown. It exerts a downward tensile force on the spring part 17 via the plunger along the arrow 32, as a result of which the closing speed at which the movable contact part 16 is placed back onto the stationary contact part 15 is increased compared to a design of the switching mechanism 14 in which the bimetal part 19 exerts only a compressive force on the spring part 17.
  • a spring snap-in part 33 is arranged at the end 20b of the plunger 21, the opposite narrow sides 34 and 35 of which also lie between the abutments 25 and 26 with play.
  • the spring snap-in part also sits with play on the tapered section 31 of the plunger 21, so that it can exert compressive and tensile forces on the spring part 17 via the plunger.
  • the spring snap-in part 33 can be arranged either between the bimetal part 19 and the plunger 21, or on the side of the bimetal part 19 facing away from the plunger 21, as is shown in FIGS Figures 1 to 5 is shown.
  • the spring snap part 33 further increases the switching dynamics of the switching mechanism 14 .
  • the closing speed is determined in the manner described above further increased, because when the switch 10 is closed, the spring snap-in part 33 jumps from its one stable configuration, in which the narrow sides 34, 35 bear against the abutments 26, back into its other stable configuration, in which the narrow sides are supported on the abutments 25 .
  • the spring snap part 33 like the bimetallic part 19 exerts a tensile force on the spring part 17 via the plunger 21 .
  • the switching of the spring snap part 33 between its two stable geometric configurations is triggered by the temperature-dependent switching of the bimetallic part 19 between its two geometric configurations.
  • the spring snap member 33 also exerts a compressive force on the spring member 17 via the plunger 21, the opening speed at which the movable contact member 16 lifts away from the stationary contact member 15 when the switch 10 is opened by snapping the bimetallic member 19 is also increased.
  • FIG. 2 shows an exploded view for a specific embodiment of the switch 10 from 1 .
  • the switch 10 includes a two-part insulator body 18 having an upper part 18a and a lower part 18b.
  • the first external connection 11 is designed as a connection plate 36 which carries the stationary contact part 15 .
  • the second external connection 12 is in the form of a connection plate 37 which is electrically connected to the spring part 17 which here has a first leg 38 to which the movable contact part 16 is fixed.
  • the spring part 17 also has a second leg 39 which runs parallel to the first leg 38 and has a laterally protruding side wing 41 which comes into contact with the second connecting plate 37 during assembly.
  • connection plates 36, 37 and the spring part 17 on top of them are clamped between the upper part 18a and the lower part 18b of the insulator body 18 in such a way that the connection plates 36, 37 are laterally out protruding from the insulator body 18, as seen in the plan view of the assembled switch 10 in Fig 4 can be seen.
  • the insulator body 18 is then inserted into an in 2 pushed to recognizable flat housing 42 that has a top 43 and a bottom 44, which are connected to each other via narrow sides 45, wherein the housing has an opening 46 on one of its narrow sides 45 and is plugged with this opening 46 on the insulator body 18, like it in 3 can be seen.
  • the bimetal part 19 is designed as a bimetal disk 47 and the spring snap-in part 33 as a spring snap-in disk 48 . Both discs have an edge 51 or 52 and are arranged in a recess 53 which is open to the outside and which is arranged on the lower outer side 18c of the lower part 18b, so that they are supported on peripheral abutments 25a or 25b of the lower part 18 b when the Switch 10 is closed.
  • a ring 54 is used, which engages over the edges 51, 52 radially inward and forms the abutment 26 on which the bimetallic disc 47 and the spring snap-action disc 48 are supported with their edges 51 and 52, respectively, when they are the Open switch 10.
  • edges 51 and 52 are guided with mechanical play between the abutments 25 and 26, so that the bimetallic disc 47 and the spring snap-in disc 48 can expand when they snap from one geometric configuration to the other.
  • the tappet 21 includes the shaft 29 with the lower tapered section 31, on which the bimetallic disc 47 and the spring snap-in disc 48 with their respective through-hole 55 and 56 are plugged with play.
  • the plunger 21 passes through the through hole 30 formed in the base 18b.
  • the head 27 has a bolt 57 and the head 28 has a bolt 58 .
  • the bolt 57 sits in an upper blind hole 61 in the shank 29, the bolt 58 in a lower blind hole 62 in the tapered section 31.
  • the heads 27 and 28 are designed to be wider than the bolts 57 and 59 and the shank 29 in diameter.
  • the first leg 38 has a through hole 63 with which it is arranged on the bolt 57 with play.
  • first leg 38 and the bimetallic disc 47 and the spring snap-in disc 48 are connected to one another under tension and pressure.
  • FIG 5 is in a second embodiment a switch 10 ⁇ and in 6 in a third exemplary embodiment, a switch 10" is shown, in each case in a representation as in FIG 1 .
  • the same reference numerals denote identical features with identical properties, so that because of the basic structure and the basic function on the above description of the 1 is referenced.
  • the switch 10 ⁇ off figure 5 has only the lower head 28, via which the bimetallic part 19 and the spring snap-in part 33 are connected to the plunger 21 in such a way that they move it along the arrow 32 in figure 5 move up and down as the bimetal member 19 and, as a result, the spring snap member 33 snaps from its respective one to the other geometric configuration.
  • the spring part 17 bears against the upper end 20a of the plunger 21, so that when the switch 20a is opened it is pushed upwards very quickly by the combined compressive force of the bimetallic part 19 and the spring part 33.
  • the bimetal part 19 jumps into its in figure 5 shown configuration back and pulls the plunger 21 down. Because the spring snap-in part 33 is also connected to the plunger 21, during this process it is first pressed down where the plunger 21 engages it, until it also snaps into its in figure 5 other stable geometric configuration shown.
  • the spring member 17 is not actively pulled down by the plunger 17 because the head 27 from 1 is not provided here. Nevertheless, the switch 10' closes faster than a switch without forced coupling between the plunger 21 and the bimetal part 19 and the spring snap part 33, because the plunger 21 is moved downwards so quickly that it does not offer any resistance to the closing movement of the spring part 17.
  • both the opening speed and the closing speed are therefore increased compared to a switch in which only one bimetal part 19 is provided, which is also not positively coupled to the plunger 21.
  • the insulator body 18 When assembling, the insulator body 18 is first joined together so that the two connection plates 36, 37 and the spring part 17 are clamped between the upper part 18a and the lower part 18b.
  • the plunger 21 is then captively connected to the bimetal part 19 and the spring snap part 33 via the head 28, and this unit thereafter in 2 inserted from below into the preassembled insulator body 18, ie into the depression 53 in the lower part 18b.
  • the plunger is passed with its upper end 20a through the through-hole 30 and comes into contact with the first leg 38 with its upper end 20a.
  • switch 10" At the switch 10" off 6 the lower head 28 is also dispensed with.
  • switch 10" has bimetal part 19 below spring snap-in part 33.
  • both heads 27, 28 are missing, there is no risk here either of the ram 21 tilting or jamming because it is guided in the through-hole 30.
  • the bimetal part 19 If the temperature of the bimetal part 19 increases beyond its transition temperature, the bimetal part 19 jumps from the in 6 shown low-temperature configuration into its other geometric configuration. In doing so, it presses in the middle of the spring snap-in part 33, which is thereby gradually bent up in its center until it suddenly snaps into its other geometrically stable configuration and, together with the bimetallic part 19, pushes the plunger into 6 suddenly pushed upwards.
  • the spring part 17 rests against the upper end 20a of the plunger 21, so that when the switch 20a is opened it is also pushed up very quickly here by the combined compressive force of the bimetal part 19 and the spring part 33.
  • the spring part 17 is not actively pulled down by the plunger 17 because the head 27 is off 1 not provided here either. Nevertheless opens the switch 10 ⁇ is not only quicker than a switch without a spring snap-in part 33, it can also close quicker if designed accordingly. This faster closing is due to the fact that the bimetallic part 19 is moved downwards so quickly as a result of the spring snap-in part 33 snapping over that it no longer offers any resistance to the plunger 21 when the plunger 21 is pushed all the way down again into its in 6 shown position is moved.
  • the insulator body 18 is assembled so that the two connecting plates 36, 37 and the spring part 17 are clamped between the upper part 18a and the lower part 18b.
  • the plunger 21 is then passed through the through hole 30 with its upper end 20a and comes into contact with the first leg 38 with its upper end 20a.

Claims (16)

  1. Commutateur dépendant de la température comprenant une première et une deuxième borne extérieure (11, 12), la première et la deuxième borne extérieure (11, 12) étant fixées à un corps d'isolateur (18), la première et la deuxième borne extérieure (11, 12) étant réalisées sous la forme d'une première ou d'une deuxième tôle de raccordement (36, 37), les deux tôles de raccordement (36, 37) faisant saillie hors du corps d'isolateur (18), et le corps d'isolateur (18) étant disposé dans un boîtier (43), comprenant une pièce de contact fixe (15) reliée de manière électriquement conductrice à la première borne extérieure (11), une pièce de contact mobile (16) qui coopère avec la pièce de contact fixe (15), laquelle est fixée à une pièce formant ressort (17), qui est reliée électriquement à la deuxième borne extérieure (12) et pousse la pièce de contact mobile (16) contre la pièce de contact fixe (15), une pièce bimétallique (19) et un poussoir (21) disposé entre la pièce bimétallique (19) et la pièce formant ressort (17), la pièce bimétallique (19), en cas de dépassement d'une température de commutation, exerçant par le biais du poussoir (21) des forces de pressage sur la pièce formant ressort (17) et soulevant ainsi la pièce de contact mobile (16) de la pièce de contact fixe (15), et la pièce formant ressort (17) possédant une première et une deuxième branche (38, 39), la pièce de contact mobile (16) étant fixée à la première branche (38), la deuxième branche (39) étant reliée électriquement à la deuxième tôle de raccordement (37) et le poussoir (21) étant disposé entre la première branche (38) et la pièce bimétallique (19),
    caractérisé en ce que le poussoir (21) est disposé entre la pièce formant ressort (17) et la pièce bimétallique (19) de telle sorte qu'il transmet les forces de pressage et de traction de la pièce bimétallique (19) à la pièce formant ressort (17).
  2. Commutateur dépendant de la température selon la revendication 1, caractérisé en ce qu'il comporte une pièce d'enclenchement de ressort (33) qui transmet des forces de pressage et de traction à la pièce formant ressort (17) par le biais du poussoir (21).
  3. Commutateur dépendant de la température selon la revendication 2, caractérisé en ce que la pièce d'enclenchement de ressort (33) et la pièce bimétallique (19) sont disposées à une première extrémité (20b) du poussoir (21) et la pièce formant ressort (17) à une deuxième extrémité (20a) du poussoir (21).
  4. Commutateur dépendant de la température selon l'une des revendications 1 à 3, caractérisé en ce que le poussoir (21) possède une tige (29) qui, à sa première extrémité (20b), possède une portion rétrécie (31) qui porte une tête (28) élargie par rapport à la portion rétrécie (31), la pièce bimétallique (19) et éventuellement la pièce d'enclenchement de ressort (33) étant disposées sur la portion rétrécie (31) avec leur trou de passage (55, 56) respectif de telle sorte que la pièce bimétallique (19) et éventuellement la pièce d'enclenchement de ressort (33) sont maintenues avec un certain jeu entre la tête (28) et la tige (29).
  5. Commutateur dépendant de la température selon la revendication 3 ou 4, caractérisé en ce que le poussoir (21) possède une tige (29) qui, à sa deuxième extrémité (20a), possède une portion rétrécie (57) qui porte une tête (27) élargie par rapport à la portion rétrécie (57), la pièce formant ressort (17 ; 38) étant disposée sur la portion rétrécie (57) avec un trou de passage (63) de telle sorte que la pièce formant ressort (17) est maintenue avec un certain jeu entre la tête (27) et la tige (29).
  6. Commutateur dépendant de la température selon l'une des revendications 1 à 5, caractérisé en ce que la pièce bimétallique (19) est réalisée sous la forme d'une languette allongée qui, au niveau de ses côtés étroits (22, 23) opposés, est respectivement disposée entre deux paliers de butée (25, 26) qui sont mutuellement opposés dans le sens longitudinal (24) du poussoir (21).
  7. Commutateur dépendant de la température selon l'une des revendications 2 à 6, caractérisé en ce que la pièce d'enclenchement de ressort (33) est réalisée sous la forme d'une languette allongée qui, au niveau de ses côtés étroits (34, 35) opposés, est respectivement disposée entre deux paliers de butée (25, 26) qui sont mutuellement opposés dans le sens longitudinal (24) du poussoir (21).
  8. Commutateur dépendant de la température selon l'une des revendications 1 à 5 ou 7, caractérisé en ce que la pièce bimétallique (19) est réalisée sous la forme d'une rondelle bimétallique (47) qui, au niveau de son bord (51), est disposée entre deux paliers de butée (25a, 54) qui sont mutuellement opposés dans le sens longitudinal (24) du poussoir (21).
  9. Commutateur dépendant de la température selon l'une des revendications 2 à 6 ou 8, caractérisé en ce que la pièce d'enclenchement de ressort (33) est réalisée sous la forme d'une rondelle d'enclenchement de ressort (48) qui, au niveau de son bord (52), est disposée entre deux paliers de butée (25b, 54) qui sont mutuellement opposés dans le sens longitudinal (24) du poussoir (21).
  10. Commutateur dépendant de la température selon l'une des revendications 1 à 9, caractérisé en ce que le boîtier (42) possède un côté supérieur (43) et un côté inférieur (44), lesquels sont reliés l'un à l'autre par des côtés étroits (45), et le boîtier possède, au niveau de l'un de ses côtés étroits (45), une ouverture (46) et est enfiché sur le corps d'isolateur (18) avec cette ouverture (46).
  11. Commutateur dépendant de la température selon l'une des revendications 1 à 10, caractérisé en ce que les deux branches (38, 39) sont écartées l'une de l'autre par flexion par le poussoir (21) en vue d'interrompre une liaison conductrice entre les deux tôles de raccordement (36, 37).
  12. Commutateur dépendant de la température selon l'une des revendications 1 à 11, caractérisé en ce que la deuxième branche (39) repose contre la deuxième tôle de raccordement (37).
  13. Commutateur dépendant de la température selon l'une des revendications 1 à 12, caractérisé en ce que le corps d'isolateur (18) est constitué de deux corps partiels (18a, 18b), et les deux tôles de raccordement (36, 37) reposent entre les deux corps partiels (18a, 18b).
  14. Commutateur dépendant de la température selon l'une des revendications 1 à 13, caractérisé en ce que la pièce bimétallique (19) est disposée dans une cavité (53) sur un côté extérieur (18c) du corps d'isolateur (18).
  15. Commutateur dépendant de la température selon l'une des revendications 1 à 14, caractérisé en ce que la pièce d'enclenchement de ressort (33) est disposée dans une cavité (53) sur un côté extérieur (18c) du corps d'isolateur (18).
  16. Commutateur dépendant de la température selon la revendication 14 ou 15, caractérisé en ce qu'une bague (54) introduite depuis l'extérieur est présente dans la cavité (53), laquelle sert de palier de butée pour la pièce d'enclenchement de ressort (33) et/ou la pièce bimétallique (19).
EP17172229.1A 2013-08-07 2014-08-04 Commutateur thermique Active EP3229255B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013108504.0A DE102013108504C5 (de) 2013-08-07 2013-08-07 Temperaturabhängiger Schalter
EP14179631.8A EP2843680B1 (fr) 2013-08-07 2014-08-04 Commutateur thermique

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP14179631.8A Division EP2843680B1 (fr) 2013-08-07 2014-08-04 Commutateur thermique

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EP3229255A1 EP3229255A1 (fr) 2017-10-11
EP3229255B1 true EP3229255B1 (fr) 2023-03-22

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EP17172229.1A Active EP3229255B1 (fr) 2013-08-07 2014-08-04 Commutateur thermique

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DE (1) DE102013108504C5 (fr)
DK (1) DK2843680T3 (fr)
ES (1) ES2637659T3 (fr)
PL (1) PL2843680T3 (fr)

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Publication number Priority date Publication date Assignee Title
JP6997685B2 (ja) * 2018-07-31 2022-01-18 ボーンズ株式会社 電流遮断装置、安全回路及び２次電池パック
CN109064700B (zh) * 2018-08-27 2024-04-02 佛山市高明毅力温控器有限公司 一种电气火灾报警器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2309207A (en) * 1938-10-14 1943-01-26 Honeywell Regulator Co Electric switch
US3972016A (en) 1974-06-28 1976-07-27 Therm-O-Disc Incorporated Thermostat
US3931603A (en) * 1974-09-19 1976-01-06 Robertshaw Controls Company Temperature responsive electrical switch construction and method of making the same
CH604148A5 (fr) 1976-02-09 1978-08-31 Wirth Gallo & Co
DE2625120C3 (de) * 1976-06-04 1980-04-10 Peter 7530 Pforzheim Hofsaess Elektrischer Temperaturschutzschalter
DE7630734U1 (de) * 1976-10-01 1977-01-20 Hofsaess, Peter, 7530 Pforzheim Temperaturwächter
CH607300A5 (fr) * 1976-11-23 1978-11-30 Limitor Ag
DE2917482C2 (de) * 1979-04-30 1982-11-25 Peter 7530 Pforzheim Hofsäss Übertemperaturschutzschalter
GB2092384A (en) 1981-01-29 1982-08-11 Elmwood Sensors Thermostats
US4669182A (en) 1984-01-23 1987-06-02 Therm-O-Disc, Incorporated Method of gaging a snap disc condition sensor
US4908596A (en) * 1989-02-17 1990-03-13 Therm-O-Disc, Incorporated Thermostat assembly
US5059937A (en) 1990-10-23 1991-10-22 Therm-O-Disc, Incorporated Switch assembly
DE4428226C1 (de) 1994-08-10 1995-10-12 Thermik Geraetebau Gmbh Temperaturwächter
US5703560A (en) 1995-09-11 1997-12-30 Elmwood Sensors, Inc. Thermostat with one-piece reset mechanism and contact assembly
DE19816807C2 (de) 1998-04-16 2000-06-08 Thermik Geraetebau Gmbh Temperaturabhängiger Schalter
DE19919648C2 (de) * 1999-04-30 2003-03-13 Marcel Hofsaess Gerät mit in einer Tasche vorgesehenem temperaturabhängigen Schaltwerk
US6597274B1 (en) 2000-05-30 2003-07-22 Therm-O-Disc, Incorporated Bimetal snap disc thermostat with heaters
DE102007014237A1 (de) * 2007-03-16 2008-09-18 Hofsaess, Marcel P. Temperaturabhängiger Schalter und dafür vorgesehenes Schaltwerk
DE102011016896C5 (de) * 2011-04-13 2016-10-27 Tmc Sensortechnik Gmbh Temperaturschutzschalter
US20130057381A1 (en) * 2011-09-06 2013-03-07 Honeywell International Inc. Thermostat and method

Also Published As

Publication number Publication date
EP2843680A2 (fr) 2015-03-04
DE102013108504B4 (de) 2015-02-19
EP2843680B1 (fr) 2017-05-31
DE102013108504A1 (de) 2015-02-12
PL2843680T3 (pl) 2017-10-31
EP3229255A1 (fr) 2017-10-11
EP2843680A3 (fr) 2015-07-08
DK2843680T3 (en) 2017-09-04
ES2637659T3 (es) 2017-10-16
DE102013108504C5 (de) 2018-11-15

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