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EP0272696A2 - Interrupteur à bilame - Google Patents

Interrupteur à bilame Download PDF

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Publication number
EP0272696A2
EP0272696A2 EP87119088A EP87119088A EP0272696A2 EP 0272696 A2 EP0272696 A2 EP 0272696A2 EP 87119088 A EP87119088 A EP 87119088A EP 87119088 A EP87119088 A EP 87119088A EP 0272696 A2 EP0272696 A2 EP 0272696A2
Authority
EP
European Patent Office
Prior art keywords
switch according
contact
heating resistor
bimetal switch
insulating body
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.)
Withdrawn
Application number
EP87119088A
Other languages
German (de)
English (en)
Other versions
EP0272696A3 (fr
Inventor
Walter Hollweck
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.)
INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
Original Assignee
INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
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 INTER CONTROL Hermann Koehler Electrik GmbH and Co KG filed Critical INTER CONTROL Hermann Koehler Electrik GmbH and Co KG
Publication of EP0272696A2 publication Critical patent/EP0272696A2/fr
Publication of EP0272696A3 publication Critical patent/EP0272696A3/fr
Withdrawn legal-status Critical Current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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/504—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by thermal means

Definitions

  • the invention relates to a bimetallic switch with the features of the preamble of claim 1.
  • a bimetallic switch is known from German utility model G 86 17 033.3, which essentially consists of a flat, rectangular insulating body to which a plurality of electrical connection contact tabs are attached.
  • One side of the insulating body carries a contact spring which is provided with a moving contact at its free end.
  • the bimetal element is attached, which, depending on the convex or concave (in relation to the relative position to the insulating body) bulge, determines the switching position of the contact spring.
  • a fixed contact cooperating with the movement contact is also arranged on the insulating body. The fixed contact is electrically connected to the fixed end of the movement contact arranged under the contact spring heating resistor connected, which is thus short-circuited when the bimetal switch is closed and is only live when the contact spring is open.
  • the known bimetallic switch is disadvantageous in that the insulating body must be provided with a recess for the arrangement and contacting of the resistance, which recess accommodates the resistance.
  • the resistor is provided as a block-shaped PTC resistor body which is held between two spring elements which act on and contact it on its top and bottom. A large number of individual elements must therefore be brought into the final assembly position before the fastening rivets holding the individual elements together are placed. This requires a high level of mechanical effort if the switch is to be produced in an automated process.
  • such a switch is sensitive due to its relatively complex structure and is not entirely satisfactory with regard to the reciprocity of its switching behavior.
  • thermal relays have already become known which have a plurality of resistors which can be interconnected in different ways, as a result of which the known thermal relay can be used in a variety of ways.
  • the invention has for its object to provide a bimetal switch with the features of the preamble of claim 1 so that it can be manufactured in a simplified manner with improved operation.
  • the at least one heating resistor is designed in particular as a sheet resistor and is preferably arranged flat on one of the flat sides of the insulating material body, then it forms, together with the insulating material body, a layer composite body which can be prefabricated on a large industrial scale in a simple manner (claim 2).
  • This insulating material body with directly applied heating resistor can be upgraded to a bimetallic switch of various designs and functions in a relatively simple manner.
  • the one heating resistor can be used as a self-holding heating resistor if the bimetal switch is one with a self-holding device. If, for example, the bimetallic element is arranged so that the switch is open when the bimetallic is cold and closed when the bimetallic is heated, the switch can be used as a temperature monitor switch which, for example, interrupts a heating current path via a switching element connected downstream.
  • the heating resistor can be designed, in particular, as a thin-film resistor or also as a thick-film resistor, it being essential in any case that it forms a composite composite body that can be prefabricated on an industrial scale (also as NTC or PTC).
  • a plurality of heating resistors which form a layered composite body with the insulating material body, are provided, which can be applied together to the insulating material body during the production process and subsequently separated from one another by a separating groove.
  • the further heating resistor advantageously has a shorter length than the first heating resistor, and the connections of the two heating resistors run parallel to one another and at right angles to the longitudinal direction of the heating resistors. This results, so to speak, in an arrangement of the heating resistors and associated connection elements in the manner of two nested U-bends, which is very space-saving and also advantageous in terms of assembly when using the switch.
  • a switch designed in this way can, for example, be soldered to a circuit board, the switch surface being perpendicular to the circuit board surface.
  • the connections are preferably beyond an insulating body edge and can be easily inserted into the board during the assembly process. To further minimize the switch size, it is possible to use a resistor on the the contact spring facing and the other resistor to be arranged on the side of the insulating body facing away from the contact spring (claim 6).
  • the resistance layers advantageously extend into the region of the associated holding rivets which penetrate the insulating material body.
  • One of the holding rivets forms the fixed contact and at the same time serves as a holder for the first electrical connection, the other holding rivet holds the fixed end of the contact spring and holds the second electrical connection.
  • the electrical connections are tab tabs protruding from the insulating body on both sides or the soldering lugs already mentioned above.
  • Claims 12 and 13 relate to an embodiment of the bimetallic switch according to the invention which is advantageous for those cases in which different application areas, that is to say in particular different temperature ranges and / or different voltage ranges, are detected with one and the same switch or thermal relay and in this case the same switching conditions are achieved which are as reproducible as possible should be.
  • temperature ranges between -20 ° C and + 80 ° C and voltage ranges of approximately 186 V - 242 V are to be understood.
  • Claims 14 and 15 relate to a special application of the bimetal switch according to the invention as a power divider.
  • bimetal switch according to the invention as a power divider, that is to say the bimetal switch is an ideal replacement for power-dividing diodes.
  • the cycle ratio of such a power division can be set by the successive switch-on and switch-off processes with the aid of a variation of the resistance value of the heating resistor. It is also the possibility of achieving the desired cycle ratio with the aid of different bimetal disks while the resistance of the heating resistor remains the same, and in particular of varying this cycle ratio in the desired manner.
  • the cycle ratio can also be adjusted by making the substrate, i.e. the insulating body relatively large, that is oversized, which results in a relatively high heat dissipation, and that this insulating body is now divided into two areas, which a predetermined breaking point are connected to one another so that a first cycle time with a complete insulating body and a different, second cycle time with an insulating body reduced by the broken-off area can be set.
  • claim 16 relates to a further advantageous use of bimetal switches according to the invention in the form of their multiple arrangement on a carrier.
  • the bimetallic switch designated 1 in the drawing figures has an insulating body 2 on which a contact spring 3 is attached, which carries a movement contact 5 at its free end 4.
  • the bimetallic element 7 designed as a circular bimetallic disc is fastened by means of clamp elements.
  • a fixed contact 8 designed as a rivet head is provided on the insulating body 2 and is in electrical connection with the movement contact 5 in the closed contact position.
  • a heating resistor 9 which is designed as a sheet resistor arranged flat on the side of the insulating material body facing the contact spring 3 and with thermal contact with the insulating body 2, and together with the insulating body 2 forms a laminated body.
  • the heating resistor 9 covers the entire sock side 10 facing the contact spring and can be designed as a thin-film resistor.
  • the layer of the heating resistor 9 encompasses both the fixed contact 8 designed as a holding rivet and also a further rivet 11 holding the contact spring at its fastening end.
  • the resistance layer of the heating resistor 9 thus connects the fixed end 12 of the contact spring 3 electrically with the fixed contact 8.
  • the resistance layer has the same layer thickness over its entire extension area, ie the entire contact area on the base side, the resistance layer is of larger area than the contact spring area, which can be seen as a broken line from FIG. 2.
  • a metallic spacer is arranged, the thickness of which i. w. corresponds to the height of the fixed contact 8.
  • the spacer 13 can - as can be seen from FIG. 3 - be formed by the base-side end of a connecting element designed as a flat plug 14.
  • the resistance layer (heating resistor 9) is drawn relatively thick in FIG. 1, it actually only has a layer thickness of approximately 2 ⁇ - 20 ⁇ , has a heating power of approximately 0.5 W - 5 W, and can be applied to the one carrying it
  • Base side 10 evaporated, sputtered, printed, grown epidactically or layered as a pasty substance.
  • the layer can furthermore be provided with a laser-burned-in adjustment groove, not shown, transverse to the longitudinal direction of the layer.
  • the insulating material body 2 consists of oxide ceramic with good thermal conductivity.
  • the heating resistor 9 consists of a thick-film resistor, which is inextricably and thermally conductive connected to the surface of the insulating body carrying it.
  • the third exemplary embodiment shown in FIG. 4 shows a bimetallic switch which carries the resistance layer on the side of the insulating material body facing away from the contact spring. With this switch, it is very important that the layer and the insulating material body have a thermally highly conductive connection.
  • the insulating material body 2 is further encompassed at its fixed contact-side end 15 by a frame-like carrier part 16, on the inside 17 of which is opposite the fixed contact 8, a changeover contact surface 18 is arranged.
  • a recess 19 which reduces the thermal inertia of the insulating material body 2 is provided in the central region and is surrounded by an edge 21 which contributes to the bottom surface 20 of the switch.
  • thermally / electrically highly conductive layer in the form of a conductive silver layer 23 is arranged in the region of the rivets 11, 22 between the surfaces of the resistance layer and the rivet surfaces and / or insulating body surfaces.
  • the insulating body 30 is designed as a flat, rectangular disk which carries the contact spring 32 with bimetallic element 33 on its front 31 and a heating resistor 35 and a further heating resistor 36 on its rear 34.
  • the arrangement and contacting of the heating resistor 35 in relation to the holding rivet and the contact spring correspond to the arrangement and contacting of the heating resistor 9 according to the first drawing figures.
  • the further heating resistor 36 which is applied in parallel to the heating resistor 35 on the rear side 34 of the insulating body 30, is not connected to the contacts of the contact spring arrangement 32, but has separate connections, namely soldering lugs 37, which run essentially parallel to the connections of the heating element 35 designed as soldering lugs 38.
  • solder tab heating resistor arrangements 38-35-38 on the one hand and 37-36-37 on the other hand result in two interlocking U-bends.
  • connection elements are connected to the insulating body 30 by rivets 39 and connected to the ends of the associated heating resistors 35 and 36 by means of conductive silver layer sections 40.
  • FIGS. 7 and 8 differs from the embodiment according to FIGS. 5 and 6 essentially in that the insulating body 52 carries on its rear flat side 53 a heating resistor 50 consisting of a PTC thermistor, this PTC thermistor preferably in the form of a cylindrical disk 51, that is to say practically in tablet form.
  • a heating resistor 50 consisting of a PTC thermistor, this PTC thermistor preferably in the form of a cylindrical disk 51, that is to say practically in tablet form.
  • two electrical connection elements 54 and 55 are provided on the rear flat side 53 of the insulating material body 52, the one connection element simultaneously serving to hold the PTC thermistor 50.
  • This connecting element 54 is preferably designed in the form of a clamping bracket or a clamping spring, which has two obliquely directed arms 56 with hooks 57 in its upper region, by means of which the upper end of the connecting element 54 can be suspended over a corresponding edge of the insulating body 52.
  • connection element 54 The opposite end of this connection element 54, however, is firmly connected to the insulating body 52 by means of a rivet 39. Furthermore, this connection element 54 has in its clamp or spring-like area a convex deflection 58 with respect to the rear flat side of the insulating body 52 such that when the connecting element 54 is fastened to the insulating material body 52, the PTC thermistor 50 can be clamped below this deflection 58 in order to thereby to reach direct contact on the corresponding flat side 53.
  • the other electrical connection element 55 for the PTC thermistor 50 can preferably be substantially L-shaped, the one web of this connection element forming an intermediate layer between the facing surfaces of the PTC thermistor 50 and the insulating body flat side 53, while the other fin of the L- shaped connecting element is in turn connected by a rivet 39 to the insulating body 52.
  • this second electrical connection element 55 can also be applied in the form of a conductive silver layer to the flat side 53 of the insulating material in such a way that this conductive silver layer serves simultaneously as a contactor and as a heat exchanger into the ceramic material of the insulating body 52.
  • this heating resistor 50 in the form of a PTC thermistor, the realization of a thermal relay is made possible in which different temperature and / or different voltage ranges are reproducibly detected.
  • Fig. 10 shows an embodiment of a multiple arrangement of bimetallic switches, which are designed, for example, according to FIGS. 5 and 6 or 7 and 8, an insulating support 41 being provided in the form of a circuit board on which a plurality of bimetallic switches or thermal relays are plugged can.
  • the carrier 41 has conductor tracks 60 and 61 on its surface opposite the arrangement of the switches 1 (cf. FIG. 11), with which the electrical connections, that is to say the soldering lugs 37 and 38 of the individual switches 1, are connected.
  • plug-in openings 62 are provided in the area of these conductor tracks 60 and 61, which extend through the circuit board forming the carrier and which are used to insert the corresponding soldering tabs 37 and 38 of the switches 1.
  • bimetallic switches 1 in this way in the form of a multiple arrangement, complex control processes can also be implemented and / or different switches 1 can be combined with one another as desired ren, for example break contacts and / or make contacts, which makes it possible, for example, to use prewarning lamps, switching operations and the like. Like. to realize more.
  • FIG. 11 also shows, the conductor tracks 60 and 61 are applied to the back of the carrier 41 in such a way that the heating resistors 35 and 36 of all the switches 1 plugged onto the carrier 41 are connected in parallel.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
EP87119088A 1986-12-24 1987-12-23 Interrupteur à bilame Withdrawn EP0272696A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3644514 1986-12-24
DE19863644514 DE3644514A1 (de) 1986-12-24 1986-12-24 Bimetallschalter

Publications (2)

Publication Number Publication Date
EP0272696A2 true EP0272696A2 (fr) 1988-06-29
EP0272696A3 EP0272696A3 (fr) 1989-12-06

Family

ID=6317249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87119088A Withdrawn EP0272696A3 (fr) 1986-12-24 1987-12-23 Interrupteur à bilame

Country Status (4)

Country Link
US (1) US4862132A (fr)
EP (1) EP0272696A3 (fr)
CA (1) CA1276668C (fr)
DE (1) DE3644514A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507425A1 (fr) * 1991-04-05 1992-10-07 Uchiya Thermostat Co. Relais électrothermique à élément de chauffage à couche
EP0557744A1 (fr) * 1992-02-28 1993-09-01 Erbengemeinschaft Peter Hofsäss Interrupteur thermique
FR2688935A1 (fr) * 1992-03-17 1993-09-24 Knobel Lichttech Interrupteur thermique a lame bimetallique avec resistance de chauffage a couche epaisse.
EP0887826A2 (fr) * 1997-06-26 1998-12-30 Marcel Hofsäss Interrupteur à commande thermique avec pont de contact
EP0951041A2 (fr) * 1998-04-16 1999-10-20 Thermik Gerätebau GmbH Interrupteur à commande thermique
EP0951040A2 (fr) * 1998-04-16 1999-10-20 Thermik Gerätebau GmbH Interrupteur à commande thermique

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5182538A (en) * 1985-11-07 1993-01-26 Limitor Ag Bimetal thermoswitch
DE3842171A1 (de) * 1988-12-15 1990-06-28 Barlian Reinhold Verzoegerungsrelais
SE9003405D0 (sv) * 1990-10-25 1990-10-25 Backer Elektro Vaerme Elektriskt roervaermeelement och temperatursaekring
JP2585164B2 (ja) * 1992-07-07 1997-02-26 ウチヤ・サーモスタット株式会社 サーモプロテクタ
DE4300909C2 (de) * 1993-01-15 1997-02-06 Abb Patent Gmbh Thermischer Auslöser, insbesondere für einen Leitungsschutzschalter
DE4335639A1 (de) * 1993-10-13 1995-04-20 Eaw Relaistechnik Gmbh Thermoschalter mit Bimetallschnappscheibe und elektrischer/thermischer Verhinderung des automatischen Rückschnappens der Bimetallschnappscheibe
JP2791383B2 (ja) * 1994-06-10 1998-08-27 ウチヤ・サーモスタット株式会社 二重安全サーモスタット
DE19507105C1 (de) * 1995-03-01 1996-05-15 Hofsaes Geb Zeitz Ulrika Temperaturwächter
DE19514853C2 (de) * 1995-04-26 1997-02-27 Marcel Hofsaes Temperaturwächter mit einem bei Übertemperatur schaltenden Bimetall-Schaltwerk
IT1277949B1 (it) * 1995-12-18 1997-11-12 Texas Instr Control And Manufa Attuatore termico con ritardo di attuazione costante al variare della temperatura ambiente
DE19604939C2 (de) * 1996-02-10 1999-12-09 Marcel Hofsaes Schalter mit einem temperaturabhängigen Schaltwerk
DE19708436C2 (de) * 1997-03-01 1999-08-19 Hofsaes Temperaturabhängiger Schalter mit Kontaktbrücke und Verfahren zu dessen Herstellung
DE19752581C2 (de) * 1997-11-27 1999-12-23 Marcel Hofsaes Schalter mit einem temperaturabhängigen Schaltwerk
US6191680B1 (en) * 1998-02-23 2001-02-20 HOFSäSS MARCEL Switch having a safety element
DE19827113C2 (de) * 1998-06-18 2001-11-29 Marcel Hofsaes Temperaturabhängiger Schalter mit Stromübertragungsglied
DE19847209C2 (de) * 1998-10-13 2002-04-25 Marcel Hofsaes Schalter mit einem Isolierstoffträger
DE19847208C2 (de) * 1998-10-13 2002-05-16 Marcel Hofsaes Schalter mit einem Isolierstoffträger
JP4471479B2 (ja) * 2000-10-13 2010-06-02 ウチヤ・サーモスタット株式会社 サーマルプロテクタ
JP2004014434A (ja) * 2002-06-11 2004-01-15 Uchiya Thermostat Kk 直流電流遮断スイッチ
JP2005108585A (ja) * 2003-09-30 2005-04-21 Alps Electric Co Ltd 熱応動スイッチ
US7800477B1 (en) * 2007-03-20 2010-09-21 Thermtrol Corporation Thermal protector
DE112008003632B4 (de) * 2008-01-28 2023-04-06 Uchiya Thermostat Co., Ltd. Hitzeschutz
JP5000540B2 (ja) * 2008-01-31 2012-08-15 新光電気工業株式会社 スイッチング機能付配線基板
WO2009125458A1 (fr) * 2008-04-10 2009-10-15 ウチヤ・サーモスタット株式会社 Protecteur thermique à opération externe
CA2721512C (fr) * 2008-04-18 2016-12-13 Tyco Electronics Japan G.K. Dispositif de protection de circuit
DE102013108508A1 (de) * 2013-08-07 2015-02-12 Thermik Gerätebau GmbH Temperaturabhängiger Schalter
US10707475B2 (en) * 2015-12-18 2020-07-07 Bourns, Inc. Battery housing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1401964A (fr) * 1963-07-19 1965-06-11 Otter Controls Ltd Interrupteur électrique sensible à la température
GB1515356A (en) * 1976-08-02 1978-06-21 Emi Ltd Electric switch
DE2709175A1 (de) * 1977-03-03 1978-09-07 Inter Control Koehler Hermann Thermostat-kombination
FR2462013A1 (fr) * 1979-07-21 1981-02-06 Limitor Ag Interrupteur thermique temporise
EP0102574A2 (fr) * 1982-08-21 1984-03-14 Limitor AG Interrupteur de protection à bilame

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8411838U1 (de) * 1984-04-14 1984-07-26 Limitor GmbH, 7530 Pforzheim Bimetallschutzschalter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1401964A (fr) * 1963-07-19 1965-06-11 Otter Controls Ltd Interrupteur électrique sensible à la température
GB1515356A (en) * 1976-08-02 1978-06-21 Emi Ltd Electric switch
DE2709175A1 (de) * 1977-03-03 1978-09-07 Inter Control Koehler Hermann Thermostat-kombination
FR2462013A1 (fr) * 1979-07-21 1981-02-06 Limitor Ag Interrupteur thermique temporise
EP0102574A2 (fr) * 1982-08-21 1984-03-14 Limitor AG Interrupteur de protection à bilame

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507425A1 (fr) * 1991-04-05 1992-10-07 Uchiya Thermostat Co. Relais électrothermique à élément de chauffage à couche
US5233325A (en) * 1991-04-05 1993-08-03 Uchiya Thermosatat Co. Thermostat with filmy heater
EP0557744A1 (fr) * 1992-02-28 1993-09-01 Erbengemeinschaft Peter Hofsäss Interrupteur thermique
FR2688935A1 (fr) * 1992-03-17 1993-09-24 Knobel Lichttech Interrupteur thermique a lame bimetallique avec resistance de chauffage a couche epaisse.
EP0887826A2 (fr) * 1997-06-26 1998-12-30 Marcel Hofsäss Interrupteur à commande thermique avec pont de contact
EP0887826A3 (fr) * 1997-06-26 1999-06-09 Marcel Hofsäss Interrupteur à commande thermique avec pont de contact
EP0951041A2 (fr) * 1998-04-16 1999-10-20 Thermik Gerätebau GmbH Interrupteur à commande thermique
EP0951040A2 (fr) * 1998-04-16 1999-10-20 Thermik Gerätebau GmbH Interrupteur à commande thermique
EP0951040A3 (fr) * 1998-04-16 2000-07-26 Thermik Gerätebau GmbH Interrupteur à commande thermique
EP0951041A3 (fr) * 1998-04-16 2000-08-02 Thermik Gerätebau GmbH Interrupteur à commande thermique

Also Published As

Publication number Publication date
DE3644514C2 (fr) 1988-12-01
DE3644514A1 (de) 1988-07-07
US4862132A (en) 1989-08-29
EP0272696A3 (fr) 1989-12-06
CA1276668C (fr) 1990-11-20

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