EP0313674B1 - Thermo-rupteur bimétallique - Google Patents

Thermo-rupteur bimétallique Download PDF

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Publication number
EP0313674B1
EP0313674B1 EP87115719A EP87115719A EP0313674B1 EP 0313674 B1 EP0313674 B1 EP 0313674B1 EP 87115719 A EP87115719 A EP 87115719A EP 87115719 A EP87115719 A EP 87115719A EP 0313674 B1 EP0313674 B1 EP 0313674B1
Authority
EP
European Patent Office
Prior art keywords
base portion
contact
bimetallic thermostatic
switch according
bimetallic
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
EP87115719A
Other languages
German (de)
English (en)
Other versions
EP0313674A1 (fr
Inventor
Hans Peter Bojer
Wolfgang Dipl.-Ing. Geiger
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.)
Temtech-Temperatur-Technik Hans Peter Bojer
Original Assignee
Temtech-Temperatur-Technik Hans Peter Bojer
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 Temtech-Temperatur-Technik Hans Peter Bojer filed Critical Temtech-Temperatur-Technik Hans Peter Bojer
Priority to AT87115719T priority Critical patent/ATE84911T1/de
Priority to DE8714253U priority patent/DE8714253U1/de
Priority to EP87115719A priority patent/EP0313674B1/fr
Priority to DE8787115719T priority patent/DE3783769D1/de
Publication of EP0313674A1 publication Critical patent/EP0313674A1/fr
Application granted granted Critical
Publication of EP0313674B1 publication Critical patent/EP0313674B1/fr
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

Definitions

  • the invention relates to a bimetallic switch, with a cover and a lower part, in which a contact lug with a fixed contact and a strip-shaped contact spring with a movable mating contact as well as an arched bimetallic snap disk, which is opposite the contact spring, are arranged, with the lower part inside a pin protrudes, the bimetallic snap disk sits loosely in the lower part and the bimetallic snap disk lies with the center of its concave side over the pin.
  • the proposed bimetallic switch is widely used as a simple temperature monitor for electrical devices of all kinds - in particular domestic appliances - with the task of interrupting a circuit when a predetermined temperature is reached.
  • Thermobimetal switches are known in a wide variety of designs and are manufactured in large quantities. With regard to operational safety, high demands are placed on these switches on the one hand and they have to be very robust, on the other hand, however, their manufacturing costs should be low. Known thermal bimetallic switches are designed to be reliable, but they are too complex.
  • thermal switch has become known from DE-A-31 41 226, which, to increase the protective function, contains two bimetal elements of different setting temperatures arranged in parallel, which independently of one another contribute to the opening and closing process of two separate contact springs, which ensures double overtemperature protection.
  • This thermal switch requires relatively high manufacturing costs and cumbersome installation and is therefore not very suitable for simple applications.
  • a bimetallic switch with a bimetallic snap disk which actuates a contact spring which cooperates with a fixed contact is also known.
  • the object of the invention is to design a bimetallic switch that is simple to manufacture and reliable and whose parts are easy to assemble.
  • the lower part is elongated rectangular trough-shaped and has two parallel side walls and a front wall connecting them between a bottom, that the bimetallic snap disk has a rectangular outline, that the contact tab with a holding hole is on a holding pin, which on Bottom of the lower part is provided, and that the contact spring is inserted with a fastening hole on a fastening pin which is provided on the bottom of the lower part.
  • Such a bimetallic switch designed in this way is very easy to manufacture, assembly can be particularly quick, its operational reliability is high, and all of its electrical and mechanical parts are protected against contact and impact.
  • the contact lug is expediently riveted to the holding pin by thermal deformation of its head.
  • the contact spring is expediently bent twice at right angles next to the fastening pin.
  • the lid advantageously carries a fitting bolt on the inside, which engages in a fitting hole in the lower part. This clearly defines the mutual position of the cover and base.
  • the cover At the end of the housing formed and for additional holding of the contact lug and the contact spring, the cover has a wall part on the underside, which engages in addition to the fastening pin between the two side walls of the lower part.
  • Two opposite shoulders can be provided in the lower part. These shoulders serve to guide the contact lug and the contact spring when inserting it into the lower part during assembly.
  • the bottom of the lower part expediently has a slope. This slope serves to increase the mechanical strength of the housing.
  • the thermal bimetallic switch shown in the drawing essentially consists of a housing 1 closed on all sides with a lower part 2 and a cover 3 , a contact lug 4 , a thermal bimetallic snap disk 5 and a contact spring 6 .
  • the housing 1 which is made from a dark - preferably black - colored plastic by compression molding, has the shape of an elongated prism with a polygonal base and is closed on all sides.
  • the housing consists of the lower part 2 and the cover 3 .
  • the lower part 2 has the shape of an elongated, rectangular, lower trough and has two parallel side walls 7 and 8, which are connected to one another by an end wall 9.
  • a cylindrical pin 12 protrudes on the inside.
  • This pin 12 has a spherical surface and is on the inside 13 of the lower part 2 - Formed on the slope 11 of the floor 10 - and it is perpendicular to the floor 10.
  • a cylindrical retaining pin 14 is provided, which is molded onto the bottom 10. Furthermore, a cylindrical mounting pin 15 is arranged on the bottom 10 on the slope 11, which is integrally formed on the slope 11.
  • two shoulders 16 and 17 are formed on the end wall 9, which lie opposite one another and which form an arcuate recess 18 in plan view.
  • the lid 3 of the housing 1 has an elongated rectangular plan, which corresponds to that of the bottom 10. This cover 3 closes the lower part 2 and is welded all around at its outer edge to the upper edges of the side walls 7 and 8 and the end wall 9.
  • the lid 3 carries on its underside 19 a wall part 20 which is L-shaped in plan and engages in a form-fitting manner next to the fastening pin 15 and between the two side walls 7 and 8 of the lower part 2 .
  • the lid 3 carries a cylindrical fitting bolt 21 inside, which engages in a fitting hole 22 of the lower part 2 , which is provided behind the shoulder 17.
  • the contact lug 4 is made of copper, brass or nickel silver and lies flat on the inside 13 of the bottom 10 of the lower part 2 and is fastened there.
  • This contact tab 4 has a long, straight leg 24, which is also in a straight, at an obtuse angle bent leg 25 merges, the end 26 protrudes into the recess 18.
  • the contact tab 4 has a holding hole 27, with which it is inserted on the holding pin 14 of the lower part 2 and is riveted by thermal deformation of the free end of the holding pin 14.
  • a small disk made of silver or another contact material is plated as a fixed contact 28.
  • the bimetallic snap disk 5 has an essentially rectangular plan with two parallel long sides 29 and 30 and two narrow sides 31 and 32 of weakly curved design; this bimetallic snap disk 5 is slightly curved and it jumps around under heating at an intended temperature.
  • the bimetallic snap disk 5 is loosely inserted into the lower part 2 between the side walls 7 and 8, the shoulders 17 and 18 and the fastening pin 15 and is opposite the contact spring 6 .
  • the bimetallic snap disk 5 is thus between the contact lug 4 and the contact spring 6 .
  • the bimetallic snap disk 5 With the center of its concave side 33, the bimetallic snap disk 5 rests on the pin 12. If the bimetallic snap disk 5 snaps due to an increase in temperature, the concave side 33 becomes convex and the edge of the bimetallic snap disk 5 opposite the recess 18 pushes the prestressed contact spring 6 up, so that the contact is opened.
  • the contact spring 6 made of a resilient material is slightly trapezoidal in plan and it merges into a narrow connecting lug 34. At its free end 35, the contact spring 6 carries a counter contact 36, which is riveted and cooperates with the fixed contact 28. The end 35 protrudes into the recess 18 of the lower part 2 .
  • the contact spring 6 is bent twice at right angles next to the fastening pin 15 in opposite directions and it carries a fastening hole 37 with which it is inserted on the fastening pin 15.
  • the contact spring 6 is riveted to the lower part 2 of the housing 1 by thermal deformation of the end 38 of the fastening pin 15.
  • the copper conductors 39 of insulated, electrical supply strands 40 are fastened by soldering or welding.
  • the cavity between the ends of the two side walls 7 and 8 of the lower part 2 and the outside of the wall part 20 of the cover 3 is filled with an electrically insulating, heat-insensitive casting compound 41.
  • the assembly of the proposed bimetallic switch is simply in front of you.
  • the tab 4 , the bimetallic snap-action disc 5 and the contact spring 6 are inserted one after the other and one above the other into the lower part 2 of the housing 1 , the ends of the holding pin 14 and of the fastening pin 15 being thermally deformed with a tool via the contact tab 4 and the contact spring 6 will.
  • the lid 3 is put on and welded or glued all around to the lower part 2 , finally the casting compound 41 is filled.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)

Claims (8)

  1. Thermorupteur bimétallique avec un boîtier fermé (1), avec un capot (3) et une partie inférieure (2), dans laquelle sont disposés une barrette de contact (4) avec un contact fixe et un ressort de contact (6) en forme de ruban avec un contre-contact mobile, ainsi qu'un bilame à déclic (5) cintré, qui se situe en vis-à-vis du ressort de contact (6), un pivot (12) dépassant de l'intérieur de la partie inférieure (2), le bilame à déclic (5) reposant librement dans la partie inférieure (2) et se situant, par le centre de sa partie concave, sur le pivot (12), caractérisé en ce que la partie inférieure (2) est réalisée en forme de cuve rectangulaire et allongée, et présente deux parois latérales parallèles (7 et 8) sur un fond (10), reliées par une paroi frontale (9), en ce que le bilame à déclic (5) présente une vue en plan essentiellement rectangulaire, en ce que la barrette de contact (4) s'emmanche par un trou de maintien (27) sur une goupille de maintien (14), prévue sur le fond (10) de la partie inférieure (2), et en ce que le ressort de contact (6) s'emmanche par un trou de fixation (37) sur une goupille de fixation (15), prévue sur le fond (10) de la partie inférieure (2).
  2. Thermorupteur bimétallique suivant la revendication 1, caractérisé en ce que la barrette de contact (4) est rivée sur la goupille de maintien (14).
  3. Thermorupteur bimétallique suivant l'une des revendications 1 et 2, caractérisé en ce que le ressort de contact (6) est rivé sur la goupille de fixation (15).
  4. Thermorupteur bimétallique suivant la revendication 3, caractérisé en ce que le ressort de contact (6) est plié deux fois à angle droit, en sens contraire, à côté de la goupille de fixation (15).
  5. Thermorupteur bimétallique suivant les revendications 1 à 4, caractérisé en ce que le capot (3) supporte un axe d'ajustage (21) côté interne, qui s'engage dans un trou d'ajustage (22), dans la partie inférieure (2).
  6. Thermorupteur bimétallique suivant les revendications 1 à 5, caractérisé en ce que le capot (3) présente une section de paroi (20) côté inférieur, qui s'engage entre les deux parois latérales (7 et 8) de la partie inférieure (2), à côté de la goupille de fixation (15).
  7. Thermorupteur bimétallique suivant les revendications 1 à 6, caractérisé par deux épaulements en vis-à-vis (16 et 17), prévus dans la partie inférieure (2).
  8. Thermorupteur bimétallique suivant les revendications 1 à 7, caractérisé en ce que le fond (10) de la partie inférieure (2) présence une obliquité (11).
EP87115719A 1987-10-27 1987-10-27 Thermo-rupteur bimétallique Expired - Lifetime EP0313674B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT87115719T ATE84911T1 (de) 1987-10-27 1987-10-27 Thermobimetallschalter.
DE8714253U DE8714253U1 (fr) 1987-10-27 1987-10-27
EP87115719A EP0313674B1 (fr) 1987-10-27 1987-10-27 Thermo-rupteur bimétallique
DE8787115719T DE3783769D1 (de) 1987-10-27 1987-10-27 Thermobimetallschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8714253U DE8714253U1 (fr) 1987-10-27 1987-10-27
EP87115719A EP0313674B1 (fr) 1987-10-27 1987-10-27 Thermo-rupteur bimétallique

Publications (2)

Publication Number Publication Date
EP0313674A1 EP0313674A1 (fr) 1989-05-03
EP0313674B1 true EP0313674B1 (fr) 1993-01-20

Family

ID=25952148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115719A Expired - Lifetime EP0313674B1 (fr) 1987-10-27 1987-10-27 Thermo-rupteur bimétallique

Country Status (2)

Country Link
EP (1) EP0313674B1 (fr)
DE (1) DE8714253U1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8801497U1 (fr) * 1988-02-06 1988-07-07 Limitor Gmbh, 7530 Pforzheim, De
JP2733499B2 (ja) * 1994-12-09 1998-03-30 ウチヤ・サーモスタット株式会社 サーモスタット
JPH09106804A (ja) * 1995-10-09 1997-04-22 Wako Denshi Kk 電池の安全装置
DE19546005C2 (de) * 1995-12-09 1999-07-08 Hofsaes Marcel Schalter mit einem temperaturabhängigen Schaltwerk
DE19705154C2 (de) * 1997-02-11 1999-06-02 Thermik Geraetebau Gmbh Temperaturabhängiger Schalter mit einem Bimetall-Schaltwerk
US6633222B2 (en) * 2000-08-08 2003-10-14 Furukawa Precision Engineering Co., Ltd. Battery breaker

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US332290A (en) * 1885-12-15 scheurman
US3322920A (en) * 1963-09-09 1967-05-30 Therm O Disc Inc Thermostatic control having magnified movement of snap member
DE7638018U1 (de) * 1976-12-04 1977-04-28 Eberle Werke Kg, 8500 Nuernberg Elektrisches Schaltgerät
JPS5798930A (en) * 1980-12-10 1982-06-19 Matsushita Electric Works Ltd Temperature switch
DE3104827A1 (de) * 1981-02-11 1982-08-19 Limitor AG, 8022 Zürich "bimetalltemperaturschalter"
DE3319227A1 (de) * 1983-05-27 1984-11-29 Microtherm Gmbh, 7530 Pforzheim Thermoschalter

Also Published As

Publication number Publication date
DE8714253U1 (fr) 1987-12-17
EP0313674A1 (fr) 1989-05-03

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