EP0058372A1 - Bimetalltemperaturschalter - Google Patents

Bimetalltemperaturschalter Download PDF

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Publication number
EP0058372A1
EP0058372A1 EP82100918A EP82100918A EP0058372A1 EP 0058372 A1 EP0058372 A1 EP 0058372A1 EP 82100918 A EP82100918 A EP 82100918A EP 82100918 A EP82100918 A EP 82100918A EP 0058372 A1 EP0058372 A1 EP 0058372A1
Authority
EP
European Patent Office
Prior art keywords
carrier
contact spring
temperature switch
switch according
lug
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Withdrawn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
EP82100918A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ag Limitor
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0058372A1 publication Critical patent/EP0058372A1/de
Withdrawn legal-status Critical Current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
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H2037/5481—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting the bimetallic snap element being mounted on the contact spring

Definitions

  • the invention relates to a bimetal temperature switch in miniature design with the features mentioned in the preamble of claim 1.
  • the two connecting lugs mostly sheet metal strips of a few tenths of a millimeter in thickness, are each fastened to the insulating plastic carrier by a hollow rivet.
  • the one connecting lug generally also represents the immovable contact piece
  • the contact spring with the movable contact piece attached to its free end is a separate component from its connecting lug, which is electrically conductively connected to the connecting lug. Since the contact spring must have special spring properties and, particularly in the case of a miniature construction, is of substantially thinner design than the connection lugs which are subjected to greater mechanical stress, the contact spring cannot simultaneously form the associated connection lug.
  • the contact spring is connected to its connecting lug simply by means of the hollow rivet with which the connecting lug is also fastened to the plastic carrier.
  • the contact spring and its connecting lug are placed one above the other and both are penetrated by the hollow rivet.
  • This type of fastening is not sufficiently strong, but it can happen that the rivet - triggered or 8 promotes through thermal expansion and deformation of the plastic carrier - loosens.
  • the result of this is poor contact between the contact spring and its associated terminal lug, which leads to an increased electrical contact resistance between the two.
  • the increased over qanos resistance in turn can lead to local overheating with temperatures that are above the switch-off temperature of the bimetal temperature switch.
  • the risk of overheating can turn a bimetal temperature switch as a means of limiting temperature into a means of increasing temperature, thereby transforming a safety device into a risk factor.
  • connection lugs can be quite varied. They can be designed as soldering lugs, screwable or rivetable lugs or also pluggable, for example provided with a pin-shaped connection end.
  • the two connecting lugs can be placed individually in an injection mold and then molded together. However, it is preferable to start with two connecting lugs which are initially connected in one piece and which are produced, for example, by a single stamping and shaping process in the predetermined angled shape.
  • the connecting lugs, which are still connected, can be adjusted particularly easily in the injection mold.
  • the necessary separation of the two connecting lugs is then carried out after the injection molding process, for example by means of a punching process.
  • the carrier is expediently provided in its central section - where the punching is to take place - at least with a reduced thickness or even with an opening. In any case, the carrier is provided with an opening after the punching process, which still has the advantage that for assembly and adjustment of the contact spring this is also easily accessible from the side facing the carrier (claim 7).
  • a snap disk is a bimetallic disk embossed into a curved shape, which abruptly changes its curvature from concave to convex or vice versa from convex to concave when the switching temperature is exceeded or fallen below.
  • Such a snap disk is usually held at its edge on the one hand between tabs which are cut out of the contact spring at the front and rear and bent up, while on the other hand on both sides next to the Contact spring two upstanding tabs are provided, which prevent the snap disk from slipping out of the side of the tabs cut out of the contact spring.
  • the side flaps can also be embedded in the carrier during the formation of the carrier by extrusion coating with the carrier material without an additional operation. But they can also be formed as extensions of the contact spring.
  • the bimetal temperature switch according to FIGS. 1-3 consists of a flat, elongated carrier 1 made of hard, electrically insulating plastic, in which two soldering lugs 2, 3 pointing in opposite directions are embedded at opposite ends.
  • the embedding is done because ß the solder lugs 2,3 are overmolded with the plastic of the carrier 1. This results in a positive connection between the carrier 1 and the solder lugs 2, 3, which is further reinforced by the fact that the solder lug sections embedded in the carrier 1 are angled several times.
  • solder lugs 2, 3, which are provided with soldering lugs 4, 5, are aligned with the underside 6 of the carrier 1
  • other parts 7, 8 of the soldering lugs 2, 3 are aligned with the upper side 9 of the carrier 1
  • the contact spring 10 is connected by spot welding to the soldering lug 2, specifically by two welding spots 13 lying symmetrically to the longitudinal axis of the switch.
  • the carrier 1 is provided with an opening 14 around the welding spots 13, die qleichzeitiq ensures that the carrier 1 is not inadmissibly heated during spot welding.
  • bimetallic snap disk 16 arranged on the outside of the contact spring 10.
  • the bimetal snap disc is i.w. Rectangular and is held on its two broad sides by the overlapping tabs 15, while the long sides of the bimetallic snap disk 16 aligned with the longitudinal edges of the contact spring 10 are held between two laterally raised tabs 17.
  • These lateral tabs 17 are extensions of the soldering lug 2, which extends beyond the welding points 13 towards the center of the carrier 1.
  • the bimetallic snap disk 16 shown convex in FIG. 2 changes its direction of curvature from convex to concave when the switching temperature is exceeded and, with its ends, rests under the tabs 15, while its middle part rests on one in the contact spring 10 embossed convex, is supported upward facing protrusion 18, and thereby the contact piece 11 from Ge q entrust Federation lifts 12th Below the contact spring 10 in the area around the bulge 18, the carrier 1 is provided with a further opening 19 which enables tools to access the contact spring 10 from below.
  • the corresponding opening 19 serves another purpose.
  • connecting lugs 2 and 3 which are initially connected in one piece, which are inserted as one piece into an injection mold and then encapsulated with plastic to form the carrier 1.
  • the initially connected connecting lugs 2 and 3 have the shape of a sheet metal strip from which the solder lugs 4 and 5 are punched out at the ends and from which two tabs between the solder lugs 4 and 5 are cut out, pointing to the solder lugs 4 and 5 immediately adjacent to them, and for formation of the solder tab parts 7 and 8 aligned with the top 9 of the carrier 1 are bent up in steps.
  • S p on both its subsequent opening 19 of the Träqers 1 the sheet metal strip having two lateral recesses provided in such a way that after the extrusion coating of the sheet metal strip, the two soldering lugs 2 and 3 are connected to one another only by a web crossing the opening 19 of the carrier 1.
  • a sheet metal strip shaped in this way can be produced from a flat sheet metal strip in only one operation.
  • the initially connected connecting lugs 2 and 3 are separated from one another in the area of the opening 19 of the carrier 1, most simply by punching out the web between the two connecting lugs 2 and 3.
  • the opening 19 is not necessarily from the beginning provided in the carrier 1, it can rather be formed by the same punching process by which the two connecting lugs 2 and 3 are separated from one another.
  • the carrier 1 is expediently shaped in such a way that it is at least reduced in thickness in the region of the later opening 19 before the punching process.
  • the advantage of this embodiment is that the connecting lugs in the injection mold can be adjusted more easily.
  • the opening 14 of the carrier 1 provided in the first embodiment is not provided in the second embodiment. Instead, the carrier 1 is kept very short and the connecting lug part 8, which is aligned with the upper side 9 of the carrier 1 and on which the contact spring 10 is fastened by two welding points 13, is above the outer edge of the carrier 1 and is located above the opening 20 of the terminal lug 2, from which the part 8 was cut out. In a corresponding manner, the terminal lug part 7 carrying the fixed contact 12 also rakes beyond the carrier 1.
  • the second exemplary embodiment differs from the first exemplary embodiment in a further feature, namely that, unlike in the first exemplary embodiment, the two tabs 17 are not designed as extensions of the connecting lug 2, but are part of the contact spring 10; the tabs 17 can be produced by leaving two lateral extensions when the contact spring 10 is punched out of the contact spring semi-finished product and then raising them.
  • the advantage of this measure is that the injection mold for the carrier 1 is easier.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Manufacture Of Switches (AREA)
EP82100918A 1981-02-11 1982-02-09 Bimetalltemperaturschalter Withdrawn EP0058372A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3104827 1981-02-11
DE19813104827 DE3104827A1 (de) 1981-02-11 1981-02-11 "bimetalltemperaturschalter"

Publications (1)

Publication Number Publication Date
EP0058372A1 true EP0058372A1 (de) 1982-08-25

Family

ID=6124562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100918A Withdrawn EP0058372A1 (de) 1981-02-11 1982-02-09 Bimetalltemperaturschalter

Country Status (2)

Country Link
EP (1) EP0058372A1 (enrdf_load_stackoverflow)
DE (1) DE3104827A1 (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0069861A3 (de) * 1981-07-15 1984-10-17 INTER CONTROL Hermann Köhler Elektrik GmbH u. Co. KG Temperaturschalter für elektrisch beheizte Geräte
EP0181573A3 (en) * 1984-11-06 1987-06-16 Inter Control Hermann Kohler Elektrik Gmbh U. Co. Kg Temperature switch, particularly thermal release
EP0313674A1 (de) * 1987-10-27 1989-05-03 Temtech-Temperatur-Technik Hans Peter Bojer Thermobimetallschalter
EP0290199A3 (en) * 1987-04-30 1990-08-01 Texas Instruments Incorporated Circuit interrupter device and method for making
GB2290169A (en) * 1994-06-10 1995-12-13 Uchiya Thermostat Double safety thermostat
WO1996036981A1 (de) * 1995-05-15 1996-11-21 Inter Control Hermann Köhler Elektrik GmbH & Co. KG Elektrische schaltvorrichtung
US6515571B2 (en) * 2000-04-17 2003-02-04 Uchiya Thermostat Co., Ltd. Thermal protector
CN101288142B (zh) * 2005-10-14 2010-12-01 打矢恒温器株式会社 温度开关
GB2481263A (en) * 2010-06-17 2011-12-21 Otter Controls Ltd Terminal for a thermally responsive electric switch

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3304121C2 (de) * 1983-02-08 1992-07-23 Bojer, Hans Peter, 7530 Pforzheim Bimetallschalter
DE3703826A1 (de) * 1987-02-07 1988-08-18 Limitor Ag Elektrischer thermobimetallschalter
ES2005863A6 (es) * 1987-04-01 1989-04-01 Martinez Martinez Remedios Perfeccionamientos en los dispositivos protectores electrotemicos
GB9100186D0 (en) * 1991-01-04 1991-02-20 Otter Controls Ltd Improvements relating to thermally responsive electric switches
DE19501231C2 (de) * 1995-01-17 1998-01-29 Inter Control Koehler Hermann Thermisch betätigbare Vorrichtung mit Bimetall-Element
CN106463302B (zh) 2015-04-28 2018-06-08 打矢恒温器株式会社 热保护器
CN113770499B (zh) * 2021-09-29 2025-04-04 苏州聚天合科技有限公司 一种电阻焊的焊接治具

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB903807A (en) * 1960-04-04 1962-08-22 Eric Hardman Taylor Improvements in or relating to thermosensitive switches
DE1924701A1 (de) * 1968-05-15 1969-11-27 Otter Controls Ltd Thermisch ansprechender Schnappschalter
DE2052935A1 (de) * 1969-12-09 1971-07-15 Electrovac Thermischer Schalter und Verfahren zu dessen Herstellung
GB1420218A (en) * 1972-04-15 1976-01-07 Lucas Electrical Co Ltd Electric switch
DE2821457A1 (de) * 1978-05-17 1979-11-22 Inter Control Koehler Hermann Temperaturschalter fuer elektrisch beheizte geraete
GB2021322A (en) * 1978-05-17 1979-11-28 Inter Control Koehler Hermann Temperature-sensitive switch for electrically heated appliances
DE2904341A1 (de) * 1979-02-06 1980-08-14 Inter Control Koehler Hermann Temperaturschalter fuer elektrisch beheizte geraete

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2831198C2 (de) * 1978-07-15 1982-11-04 Limitor AG, 8022 Zürich Bimetalltemperaturschalter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB903807A (en) * 1960-04-04 1962-08-22 Eric Hardman Taylor Improvements in or relating to thermosensitive switches
DE1924701A1 (de) * 1968-05-15 1969-11-27 Otter Controls Ltd Thermisch ansprechender Schnappschalter
DE2052935A1 (de) * 1969-12-09 1971-07-15 Electrovac Thermischer Schalter und Verfahren zu dessen Herstellung
GB1420218A (en) * 1972-04-15 1976-01-07 Lucas Electrical Co Ltd Electric switch
DE2821457A1 (de) * 1978-05-17 1979-11-22 Inter Control Koehler Hermann Temperaturschalter fuer elektrisch beheizte geraete
GB2021322A (en) * 1978-05-17 1979-11-28 Inter Control Koehler Hermann Temperature-sensitive switch for electrically heated appliances
DE2904341A1 (de) * 1979-02-06 1980-08-14 Inter Control Koehler Hermann Temperaturschalter fuer elektrisch beheizte geraete

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0069861A3 (de) * 1981-07-15 1984-10-17 INTER CONTROL Hermann Köhler Elektrik GmbH u. Co. KG Temperaturschalter für elektrisch beheizte Geräte
EP0181573A3 (en) * 1984-11-06 1987-06-16 Inter Control Hermann Kohler Elektrik Gmbh U. Co. Kg Temperature switch, particularly thermal release
EP0290199A3 (en) * 1987-04-30 1990-08-01 Texas Instruments Incorporated Circuit interrupter device and method for making
EP0313674A1 (de) * 1987-10-27 1989-05-03 Temtech-Temperatur-Technik Hans Peter Bojer Thermobimetallschalter
GB2290169A (en) * 1994-06-10 1995-12-13 Uchiya Thermostat Double safety thermostat
US5659285A (en) * 1994-06-10 1997-08-19 Uchiya Thermostat Co. Double safety thermostat having movable contacts disposed in both ends of a resilient plate
GB2290169B (en) * 1994-06-10 1998-12-09 Uchiya Thermostat Double safety thermostat
WO1996036981A1 (de) * 1995-05-15 1996-11-21 Inter Control Hermann Köhler Elektrik GmbH & Co. KG Elektrische schaltvorrichtung
US6515571B2 (en) * 2000-04-17 2003-02-04 Uchiya Thermostat Co., Ltd. Thermal protector
CN101288142B (zh) * 2005-10-14 2010-12-01 打矢恒温器株式会社 温度开关
GB2481263A (en) * 2010-06-17 2011-12-21 Otter Controls Ltd Terminal for a thermally responsive electric switch
GB2481263B (en) * 2010-06-17 2017-03-01 Otter Controls Ltd Thermally responsive electric switches

Also Published As

Publication number Publication date
DE3104827C2 (enrdf_load_stackoverflow) 1991-09-12
DE3104827A1 (de) 1982-08-19

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19830730

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DER ERFINDER HAT AUF SEINE NENNUNG VERZICHTET.