EP0794546B1 - Schalter mit einem temperaturabhängigen Schaltwerk - Google Patents

Schalter mit einem temperaturabhängigen Schaltwerk Download PDF

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Publication number
EP0794546B1
EP0794546B1 EP97100576A EP97100576A EP0794546B1 EP 0794546 B1 EP0794546 B1 EP 0794546B1 EP 97100576 A EP97100576 A EP 97100576A EP 97100576 A EP97100576 A EP 97100576A EP 0794546 B1 EP0794546 B1 EP 0794546B1
Authority
EP
European Patent Office
Prior art keywords
switch
countercontact
anyone
switching mechanism
contact
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.)
Expired - Lifetime
Application number
EP97100576A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0794546A3 (de
EP0794546A2 (de
Inventor
Michael Becher
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 EP0794546A2 publication Critical patent/EP0794546A2/de
Publication of EP0794546A3 publication Critical patent/EP0794546A3/de
Application granted granted Critical
Publication of EP0794546B1 publication Critical patent/EP0794546B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches

Definitions

  • the present invention relates to a switch with a a temperature-dependent switchgear housing that has a lower part, on the inner bottom of a first Counter contact for the rear derailleur is arranged, as well as a Cover part closing bottom part includes, on the inside a second counter contact is provided for the switching mechanism, the switching mechanism depending on its temperature electrically conductive connection between the two mating contacts manufactures that can be contacted from the outside.
  • the housing has an electrical made of conductive material and a lower part closing lid part, which is made of insulating material is.
  • the rear derailleur is arranged in this housing Includes spring washer, which carries a movable contact part.
  • the spring washer works against a bimetallic snap washer, which is put over the movable contact part.
  • the bottom of the lower part serves as another counter contact for the rear derailleur.
  • the spring washer itself made of electrically conductive material is manufactured, it maintains the response temperature of the Switchgear for a low-resistance, electrically conductive connection between the mating contact on the cover part and the Mating contact on the lower part, the lower part from the outside is contacted. Now the temperature of the rear derailleur increases, the bimetallic snap disc snaps suddenly and pushes the movable contact part against the force of the Spring washer away from the mating contact of the cover, so that the electrical connection is interrupted.
  • Such switches are generally used for temperature monitoring used by electrical devices. As long as the temperature of the electrical device a predetermined response temperature does not exceed, the switch remains closed in line with the consumer to be protected is switched. Now the temperature of the consumer increases impermissible, the bimetallic snap disk snaps and thus interrupts the flow of electricity to the consumer.
  • the known switch has the disadvantage that its manufacture is relatively expensive. This is mainly due to the fact that after the counter contact after the manufacture of the cover part must be attached to the cover part, while at the same time for an electrically conductive connection through the wall of the cover part through to the outside. This happens after Kind of a rivet outside the lid in a head passes over, soldered to the strands, crimp connections etc. can. This assembly of the mating contact on the cover part takes place usually manually and is therefore very expensive.
  • Another switch is known from DE 21 21 802 A1, in whose housing is also a temperature-dependent as described above Rear derailleur is arranged.
  • Lid part and lower part are both pot-shaped and made made of electrically conductive material.
  • Both on the top as well as to the lower part are one-piece crimp connections integrally formed, whereby the crimp connection of the lower part through a corresponding notch in the wall of the upper part after extends outside.
  • an insulating film is arranged around the two housing parts electrically isolate from each other.
  • the temperature-dependent switching mechanism now contacts on the one hand over the spring washer the lower part and on the other hand over the Movable contact part, the cover part, so that an electrical there is a conductive connection between the two crimp connections, as long as the temperature of the switch mechanism is below the response temperature lies. If the temperature of the rear derailleur rises, so this electrical connection is made as described above interrupted.
  • the temperature-dependent switching mechanism includes one bimetal spring clamped on one side, at its free end maintains a moving contact that is below the response temperature of the rear derailleur with a fixed counter contact Is plant, which is arranged on the inside of the lid.
  • the bimetal spring is firmly clamped at its other end and connected to a resistor connected to the bottom of the Lower part runs.
  • a resistor connected to the bottom of the Lower part runs.
  • the button-like head merges into a flap that goes underneath the wall of the lower part runs through and next to the lower part merges into a connection flag.
  • this object is achieved with the above-mentioned Switch solved in that the lower part made of insulating material is made, the first counter contact through a wall of the Lower part can be contacted from the outside, and that Cover part is made of electrically conductive material as well at the same time acts as a second counter contact, the cover part is preferably inserted into the lower part and on or from an upper edge of the lower part is held.
  • the object on which the invention is based is achieved in this way completely solved. Because the lower part is now made of insulating material is made, no insulation sheet is required to cover a appropriate electrical insulation between the lower part and To worry about the cover part. Another advantage is that the cover part itself acts as a counter contact, so that when State of the art elaborate through-plating Cover part is omitted. This contacting from the outside can with the lower part much easier e.g. achieve by that a slot is provided in the wall of the lower part, through which a connecting part of the first mating contact follows extends outside.
  • the bottom part can be used as a pot with a Longitudinal slot are made in its outer wall, then the first counter contact only has to be inserted in such a way that its outwardly projecting connector lies in the slot. Then the bimetal rear derailleur is then preferably in reverse order as previously known and finally the lid part follows, which is on the edge of the Lower part is held directly, where e.g. locking lugs are provided.
  • the entire assembly of the new switch is therefore very simple, with relatively few components required be, so that the cost of the new switch as a result keep its simple construction very low.
  • the outer bottom of the lower part can be used as an insulating support surface be used so that the new switch is easier can be mounted on a device to be protected.
  • the first counter contact in the Lower part by casting or injection molding during manufacture of the lower part is held so captive that it is an integral part of the lower part.
  • the lower part is now e.g. as a plastic molded part can be manufactured, whereby during the Injection molding the first mating contact directly overmolded so that it becomes an integral part of the lower part.
  • this base is the attachment of the mating contact to the Bottom of the lower part realized, so that several Operations can be saved.
  • the first mating contact through the extrusion coating to the outside completely isolated so that a subsequent isolation by epoxy or an insulating cap, as was previously known, is eliminated.
  • the first counter contact an integrally formed, through a wall of the lower part externally projecting connector.
  • the advantage here is that both the assembly of the first counter contact on the lower part as well as its plated-through hole through the wall to the outside during the manufacture of the lower part can be implemented integrally in one work step.
  • the Mating contacts with molded connection parts can e.g. taped delivered on the line, whereupon a spraying machine one counter contact after the other with the lower housing part molded. Then all that has to be done in this lower part Bimetal rear derailleur are inserted, whereupon it then with the lid part is closed, the second at the same time Counter contact works. Overall, there are very few Manufacturing steps in the entire manufacture of the new Switch, so the cost of this switch is very low can be held.
  • the first counter contact is one electrically conductive ring or an electrically conductive Washer, wherein it is preferably designed as a stamped sheet metal part, on which the connector is integrally formed. Also the second counter contact is preferably used as a stamped sheet metal part molded connection part formed.
  • Disks and rings preferably as sheet metal stampings particularly easy and inexpensive to manufacture and easy to shed or overmolded, so that the manufacture of the lower part with integral counter contact arranged therein is inexpensive and easy to implement.
  • the connector then extends automatically after such production through a side wall of the lower part to the outside.
  • the first mating contact is designed as a ring
  • the result is there is a large free area of insulating material in the middle, with which the movable contact part of the bimetal rear derailleur can get into plant without it being an electrical Contact with the mating contact, so here on the otherwise required insulating washer between the Bimetal rear derailleur and the cover part can be dispensed with.
  • a electrically conductive spring washer which includes a movable Contact part carries and against a bimetallic snap disc works, which sits approximately in the middle on the movable contact part, wherein the spring washer with its edge on a mating contact supports and the movable contact part against the other Counter contact presses when the rear derailleur is below it Response temperature.
  • bimetallic rear derailleur are generally state of the art known in the art, they have the advantage that the Current flows through the spring washer, so that the bimetal snap disk undergoes no self-heating and thus not disadvantageous in terms of their response behavior or is influenced unpredictably. If such a rear derailleur is now located in the new switch, so the is supported Spring washer on the first counter contact and presses it movable contact part against the second counter contact. at The bimetallic snap disk snaps when the temperature of the rear derailleur rises around and now supports itself with its edge inside on the cover part and presses the movable contact part with the spring washer pointing down to the bottom of the lower part. If the first counter contact is now designed as a ring, so the movable contact part does not come with it now in plant, so that the electrical connection between external connections of the new switch is broken, though the spring washer with its edge on the inside of the cover part supported.
  • the first counter contact because of the better heat transfer is designed as a disc, so only an insulating disc inserted between the bimetallic snap disk and the cover part to make contact in the high temperature position Edge of the spring washer and second counter contact and thus one prevent unwanted short circuit.
  • the first Counter contact has an approximately central contact projection, with which the movable contact part of the rear derailleur below of whose response temperature is in the system.
  • the advantage here is that the rear derailleur, so to speak, "overhead" is inserted into the housing so that the spring washer below the response temperature with its edge on the Supported cover part.
  • An advantage of this arrangement is that easy assembly, because now the bimetal snap disc can be placed in the lower part where it may centered on the contact tab. Then the Spring washer inserted with welded-on contact part in the opening of the bimetallic snap disc also automatically centered so that the assembly of the new switch is now automatic is possible.
  • the lower part now overlaps the first Counter contact ring-shaped, so that an insulating contact area is formed on the first counter contact.
  • the cost advantage of the new switch is not only in the small number of assembly steps and the ability to be automated assembly, another advantage achieved that the insulating washer is now completely dispensed with can be.
  • This insulating washer must be in the prior art a whole range of requirements regarding dielectric strength etc. meet so that they are a very expensive component whose price is noticeable in the total price of the known Switches down. So now on this insulating washer can be dispensed with, this also reduces costs of the new switch once again considerably.
  • the cover part on an inner Shoulder of the lower housing part rests the edge of the Lower housing part preferably after inserting the cover part is hot stamped or welded.
  • a switch is shown at 10, in its housing 11, a temperature-dependent switching mechanism 12 is arranged.
  • Such switches are e.g. to monitor the temperature of electrically operated devices and to this Purpose electrically connected in series with the device.
  • the housing 11 comprises a lower part having a wall 13 14, on the inner bottom 15 of a first counter contact 16 for the switching mechanism 12 is arranged.
  • the lower part 14 is through a cover part 17 closed, on the inside 18 a second counter contact 19 is provided.
  • the cover part 17 is electrically conductive, so that it acts as a second counter contact.
  • the first mating contact 16 is designed as a ring 21, the Connection part 22 through a slot 23 in the wall 13 after extends outside.
  • the ring 21 inserted into the interior of the lower part 14 that the Connector 22 slides down through the slot 23.
  • This Slot 23 can be made very thin, so that it Function of the new switch is not affected. However, it is possible after inserting the first mating contact 16 Shed slot 23 or hot stamp.
  • the second mating contact 19 is designed as a disk 24 which with its edge 25 on an inner circumferential shoulder 26 of the lower part 14 supports.
  • the edge 25 of the disc 24 will surmounted by an edge 27 of the lower part 14.
  • locking lugs 28 are provided which the disc 24 captive hold on shoulder 26.
  • a connecting part 29 of the second counter-contact 19 is located within the edge 27 extends above where it can be contacted appropriately can.
  • the switching mechanism 12 comprises a spring washer 31 which is movable Contact part 32 carries that in the embodiment shown is welded to the spring washer 31.
  • the spring washer 31 is supported with its edge 33 on the ring 21 and presses in the low temperature position shown in Fig. 1 the movable contact part 32 against the disc 24, so that a total of 31 via the electrically conductive spring washer electrical connection between the connecting parts 22 and 29 will be produced.
  • a bimetallic snap disk 34 as well as an insulating washer 35.
  • FIG. 2 is another embodiment of the new Switch 10 shown, in which the first counter contact as Washer 37 is formed.
  • the disc 37 is on its edges overlapped annularly by the lower housing part 14, so that a insulating support area 38 is formed, which is the pane 37 also isolated at the top.
  • the disc 37 also has a contact projection approximately in the center 39, which points into the interior of the housing 11.
  • the counter contact 16 now molded in the manufacture of the lower part 14 or encapsulated so that it is an integral part of the lower part 14 is.
  • the bimetal rear derailleur is in FIG. 2 compared to FIG. 1 so to speak inserted "overhead” so that the movable contact part 32 with the low-temperature position shown in FIG the contact projection 39 is in plant.
  • the spring washer 31 supports with its edge 33 on the inside of the cover part 17, so that a conductive connection between the connection parts 22, 29 is produced, both of them laterally through the wall 13 of the lower part 14 extend.
  • the connecting part 29 is not in one in FIG. 2 discerning notch in the edge 27 so that it can be added can be used from above. It can be seen that the Edge 27 overlaps the disc 24 at its edge and thus it holds captive. This attachment is achieved that an originally straight edge 27 after the Inserting the disk 24 is hot stamped or hot welded is so that it at least partially overlaps the disc 24. If the edge 27 is pulled up accordingly, so much can Insulating material should be provided that the disc 24 after is insulated on the outside when the edge 27 is hot stamped.
  • this type of assembly becomes a switch completely insulated from the outside, from which only the two connecting parts 22 and 29 protrude. Since both counter contacts 16 and 19 as disks 37 and 24, respectively trained, is still a good thermal connection possible to the outside.
  • the switch 10 from FIG. 2 also to the insulating disk shown in FIG. 1 35 can be dispensed with. If now the rear derailleur 12 so is heated far that the bimetallic snap disk 34 in their high temperature position changes, so this is supported then on the insulating support area 38 and presses it movable contact part 32 away from the contact projection 39 until finally also the spring washer 31 from the concave shown jumps into a convex shape. Spring washer 31 and bimetallic snap washer 34 are now leaning against it with their edges isolating contact area 38, so that a possibly possible System in the area of the movable contact part 32 to the Cover part 17 does not cause an undesirable short circuit between the two connecting parts 22 and 29 leads.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Electric Clocks (AREA)
  • Switches With Compound Operations (AREA)
  • Pens And Brushes (AREA)
EP97100576A 1996-03-09 1997-01-16 Schalter mit einem temperaturabhängigen Schaltwerk Expired - Lifetime EP0794546B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19609310 1996-03-09
DE19609310A DE19609310C2 (de) 1996-03-09 1996-03-09 Schalter mit einem temperaturabhängigen Schaltwerk

Publications (3)

Publication Number Publication Date
EP0794546A2 EP0794546A2 (de) 1997-09-10
EP0794546A3 EP0794546A3 (de) 1998-10-28
EP0794546B1 true EP0794546B1 (de) 2003-05-07

Family

ID=7787814

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97100576A Expired - Lifetime EP0794546B1 (de) 1996-03-09 1997-01-16 Schalter mit einem temperaturabhängigen Schaltwerk

Country Status (8)

Country Link
US (1) US5864278A (da)
EP (1) EP0794546B1 (da)
AT (1) ATE239975T1 (da)
CA (1) CA2199302C (da)
DE (2) DE19609310C2 (da)
DK (1) DK0794546T3 (da)
ES (1) ES2197261T3 (da)
PT (1) PT794546E (da)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19748589C2 (de) * 1997-11-04 1999-12-09 Marcel Hofsaes Schalter mit einem temperaturabhängigen Schaltwerk
DE19752581C2 (de) * 1997-11-27 1999-12-23 Marcel Hofsaes Schalter mit einem temperaturabhängigen Schaltwerk
DE19919648C2 (de) 1999-04-30 2003-03-13 Marcel Hofsaess Gerät mit in einer Tasche vorgesehenem temperaturabhängigen Schaltwerk
EP1224714A2 (de) 1999-10-27 2002-07-24 Thermik Gerätebau GmbH Anschlussklemme
DE10110562C1 (de) * 2001-03-06 2002-12-19 Marcel Hofsaes Temperaturabhängiger Schalter mit aufgestempelter Kleberschicht
JP2006092825A (ja) * 2004-09-22 2006-04-06 Fuji Denshi Kogyo Kk 温度スイッチと温度スイッチの組立方法
DE102008048554B3 (de) 2008-09-16 2010-02-04 Hofsaess, Marcel P. Temperaturabhängiger Schalter
DE102009061050B4 (de) 2009-06-05 2019-09-05 Marcel P. HOFSAESS Bimetallteil und damit ausgestattete temperaturabhängige Schalter
DE102009025221A1 (de) 2009-06-05 2010-12-16 Hofsaess, Marcel P. Bimetallteil und damit ausgestattete temperaturabhängige Schalter
DE102009039948A1 (de) 2009-08-27 2011-03-03 Hofsaess, Marcel P. Temperaturabhängiger Schalter
GB2481240B (en) * 2010-06-17 2017-04-12 Otter Controls Ltd Thermally responsive electric switches
DE102011108660B3 (de) * 2011-06-28 2012-11-22 Thermik Gerätebau GmbH Selbsthaltender temperaturabhängiger Schalter
DE102011119637B4 (de) * 2011-11-22 2013-06-06 Marcel P. HOFSAESS Temperaturabhängiger Schalter mit einem temperaturabhängigen Schaltwerk sowie Verfahren zum Herstellen eines solchen Schalters
US9805588B2 (en) 2012-05-30 2017-10-31 Factory Mutual Insurance Company Wireless fire protection valve inspection and monitoring systems, and methods for automated inspection and monitoring of fire protection systems
DE102012110708A1 (de) 2012-11-08 2014-05-08 Thermik Gerätebau GmbH Schaltkappe mit integriertem temperaturabhängigen Schalter
ITMI20132139A1 (it) * 2013-12-19 2015-06-20 Electrica S R L Dispositivo di protezione per apparecchi elettrici, in particolare per motori elettrici, compressori e trasformatori
DE102014207174A1 (de) * 2014-04-15 2015-10-29 Siemens Aktiengesellschaft Kurzschlussvorrichtung zum automatischen Kurzschließen eines Transistors und Verfahren zu einem solchen Kurzschließen
DE102014116888B4 (de) 2014-11-18 2018-05-17 Thermik Gerätebau GmbH Temperaturabhängiger Schalter
DE102019110448A1 (de) * 2019-04-23 2020-10-29 Marcel P. HOFSAESS Temperaturabhängiger Schalter und Verfahren zur Herstellung eines temperaturabhängigen Schalters
DE102022120446B3 (de) 2022-08-12 2023-11-30 Marcel P. HOFSAESS Temperaturabhängiger Schalter

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2121802C3 (de) * 1971-05-03 1974-10-24 Thermik-Geraetebau Gmbh + Co, 7530 Pforzheim Temperaturwächter
US3818410A (en) * 1973-03-02 1974-06-18 Fasco Industries High voltage thermostat
DE3122899C2 (de) * 1981-06-10 1984-10-11 Peter 7530 Pforzheim Hofsäss Temperaturschalter
US4490704A (en) * 1983-09-14 1984-12-25 Therm-O-Disc, Incorporated Thermally responsive switching device
DE3710672C2 (de) * 1987-03-31 1997-05-15 Hofsaes Geb Zeitz Ulrika Temperaturwächter mit einem Gehäuse
DE8915123U1 (de) * 1989-12-23 1990-08-23 Hofsäss, Peter, 75181 Pforzheim Temperaturschalter
ES2071697T3 (es) * 1990-04-25 1995-07-01 Ulrika Hofsass Interruptor termico.
GB9109316D0 (en) * 1991-04-30 1991-06-19 Otter Controls Ltd Improvements relating to electric switches
DE4345350C2 (de) * 1993-10-30 1997-05-22 Hofsaes Geb Zeitz Ulrika Temperaturabhängiger Schalter sowie Verfahren für dessen Herstellung
US5489762A (en) * 1994-05-25 1996-02-06 Texas Instruments Incorporated Appliances having resistive heating elements and thermal protective apparatus used therewith

Also Published As

Publication number Publication date
PT794546E (pt) 2003-09-30
US5864278A (en) 1999-01-26
DE59710004D1 (de) 2003-06-12
CA2199302C (en) 1999-12-21
EP0794546A3 (de) 1998-10-28
DE19609310A1 (de) 1997-09-11
EP0794546A2 (de) 1997-09-10
DE19609310C2 (de) 1999-07-15
ES2197261T3 (es) 2004-01-01
ATE239975T1 (de) 2003-05-15
DK0794546T3 (da) 2003-06-02
CA2199302A1 (en) 1997-09-09

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