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EP0313674A1 - Thermal bimetallic switch - Google Patents

Thermal bimetallic switch Download PDF

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Publication number
EP0313674A1
EP0313674A1 EP87115719A EP87115719A EP0313674A1 EP 0313674 A1 EP0313674 A1 EP 0313674A1 EP 87115719 A EP87115719 A EP 87115719A EP 87115719 A EP87115719 A EP 87115719A EP 0313674 A1 EP0313674 A1 EP 0313674A1
Authority
EP
European Patent Office
Prior art keywords
switch according
bimetallic switch
contact
bimetallic
pin
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.)
Granted
Application number
EP87115719A
Other languages
German (de)
French (fr)
Other versions
EP0313674B1 (en
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 DE8714253U priority Critical patent/DE8714253U1/en
Priority to DE8787115719T priority patent/DE3783769D1/en
Priority to AT87115719T priority patent/ATE84911T1/en
Priority to EP87115719A priority patent/EP0313674B1/en
Publication of EP0313674A1 publication Critical patent/EP0313674A1/en
Application granted granted Critical
Publication of EP0313674B1 publication Critical patent/EP0313674B1/en
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 closed housing with a cover and a trough-shaped 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 .
  • the proposed bimetallic switch is widely used as a 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.
  • Thermal bimetallic 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 are too expensive.
  • thermobimetal switch with a closed housing 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 a domed thermobimetal snap disk, which is opposite the contact spring, are arranged, started and solved the problem in that a pin protrudes on the inside of the lower part of the housing, that the bimetallic snap disk sits loosely in the lower part, and that the bimetallic snap disk lies with the center of its concave side above the pin.
  • a bimetallic switch designed in this way is very easy to manufacture, assembly can be particularly quick and its operational reliability is high.
  • the pin on which the bimetallic snap disk rests is expediently formed on the inside of the lower part.
  • the lower part is advantageously elongated, rectangular and has two between one floor parallel side walls and an end wall connecting them.
  • the housing advantageously consists of a dark-colored, thermoplastic material, the heat capacity of which is low.
  • the bimetallic snap disk has a rectangular layout. This floor plan is easy to produce and gives favorable snap properties.
  • the contact tab is attached to the bottom of the lower part.
  • the contact lug is expediently inserted with a holding hole on a holding pin which is provided on the bottom of the lower part.
  • the contact lug is expediently riveted to the holding pin by thermal deformation of its head.
  • the contact spring with a fastening hole is placed on a fastening pin which is provided on the bottom of the lower part of the housing. This measure allows easy assembly.
  • the latter is riveted to the fastening pin, which in turn occurs through thermal deformation of the free end thereof.
  • the contact spring is expediently bent twice at right angles next to the fastening pin.
  • the inside of the cover advantageously carries a fitting bolt which engages in a fitting hole in the lower part of the housing. This clearly defines the mutual position of the cover and base.
  • the cover At the end of the housing 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 of the housing. 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 of the housing expediently has a slope. This slope serves to increase the mechanical strength of the housing 1 .
  • 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 produced 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 fastening 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.
  • 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 tab 4 is made of copper, brass or nickel silver and is just on the inside 13 of the bottom 10 of the lower part 2 and it is attached 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 formed 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 mounting pin 15 in opposite directions and it carries a mounting hole 37 with which it is inserted on the mounting pin 15. Due to thermal deformation of the end 38 of the fastening pin 15, the contact spring 6 is riveted to the lower part 2 of the housing 1 .
  • the copper conductors 39 of insulated, electrical feed 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 contact lug 4 , the bimetallic snap disk 5 and the contact spring 6 are inserted one after the other and one above the other in the lower part 2 of the housing 1 , the ends of the holding pin 14 and the fastening pin 15 being thermally deformed using a tool via the contact lug 4 and the contact spring 6 .
  • the lid 3 is put on and welded or glued all around to the lower part 2 , finally the casting compound 41 is filled.

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

Abstract

Thermal bimetallic switches are intended to be capable of production very cost-effectively and to have a high operating reliability. Known thermal bimetallic switches are admittedly reliable but their design is too complex. In order to simplify the production of a thermal bimetallic switch, to simplify its installation and to improve its operating reliability, the domed thermal bimetallic snap disc 5, located opposite the contact spring 6, is inserted loosely into the lower part 2 of the housing 1 and is located with its concave side 33 above a peg 12, which projects in the lower part 2. Thermal bimetallic switches are in widespread use as temperature monitors for electrical apparatuses of every type with the object of interrupting a circuit when a predetermined temperature is reached. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Thermobimetall­schalter, mit einem geschlossenen Gehäuse mit einem Deckel und einem wannenförmigen Unterteil, in wel­chem eine Kontaktfahne mit einem festen Kontakt und eine streifenförmige Kontaktfeder mit einem beweglichen Gegen­kontakt sowie eine gewölbte Thermobimetall-Schnappscheibe, die der Kontaktfeder gegenüberliegt, angeordnet sind.The invention relates to a bimetallic switch, with a closed housing with a cover and a trough-shaped 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 .

Der vorgeschlagene Thermobimetallschalter findet viel­fache Anwendung als Temperaturwächter für elektrische Geräte jeglicher Art - insbesondere von Hausgeräten - mit der Aufgabe, einen Stromkreis bei Erreichen einer vor­bestimmten Temperatur zu unterbrechen.The proposed bimetallic switch is widely used as a 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.

Thermobimetallschalter sind in den unterschiedlichsten Ausführungsformen bekannt und werden in großen Stückzah­len hergestellt. Hinsichtlich der Betriebssicherheit wer­den einerseits hohe Anforderungen an diese Schalter ge­stellt und die müssen sehr robust sein, andererseits sollen jedoch ihre Herstellkosten niedrig liegen. Bekannte Thermo­bimetallschalter sind zwar betriebssicher aber zu aufwen­dig konzipiert.Thermal bimetallic 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 are too expensive.

Es ist die Aufgabe der Erfindung, die Herstellung eines Thermobimetallschalters zu vereinfachen, dessen Montage zu erleichtern und seine Betriebssicherheit zu erhöhen.It is the object of the invention to simplify the manufacture of a bimetallic switch, to facilitate its assembly and to increase its operational safety.

Zur Lösung der gestellten Aufgabe wird von einem bekannten Thermobimetallschalter, mit einem geschlossenen Gehäuse mit einem Deckel und einem Unterteil, in dem eine Kontaktfahne mit einem festen Kontakt und eine streifen­förmige Kontaktfeder mit einem beweglichen Gegenkontakt sowie eine gewölbte Thermobimetall-Schnappscheibe, die der Kontaktfeder gegenüberliegt, angeordnet sind, ausgegangen und gelöst wird die Aufgabe dadurch, daß am Unterteil des Gehäuses innen ein Zapfen hervorsteht, daß die Thermo­bimetall-Schnappscheibe lose im Unterteil sitzt, und daß die Thermobimetall-Schnappscheibe mit der Mitte ihrer kon­kaven Seite über dem Zapfen liegt. Ein solchermaßen ausge­bildeter Thermobimetallschalter läßt sich sehr einfach her­stellen, die Montage kann besonders schnell vor sich gehen und seine Betriebssicherheit ist hoch.To solve the problem, a known thermobimetal switch, with a closed housing 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 a domed thermobimetal snap disk, which is opposite the contact spring, are arranged, started and solved the problem in that a pin protrudes on the inside of the lower part of the housing, that the bimetallic snap disk sits loosely in the lower part, and that the bimetallic snap disk lies with the center of its concave side above the pin. A bimetallic switch designed in this way is very easy to manufacture, assembly can be particularly quick and its operational reliability is high.

Zweckmäßig ist der Zapfen, auf welchem die Thermobimetall-­Schnappscheibe aufliegt, an der Innenseite des Unterteiles angeformt.The pin on which the bimetallic snap disk rests is expediently formed on the inside of the lower part.

Vorteilhaft ist der Unterteil länglich-rechteckig wannen­förmig ausgebildet und weist zwischen einem Boden zwei parallele Seitenwände sowie eine diese verbindende Stirn­wand auf.The lower part is advantageously elongated, rectangular and has two between one floor parallel side walls and an end wall connecting them.

Zur Verbesserung des Wärmedurchganges besteht das Gehäuse vorteilhaft aus einem dunkel eingefärbten, thermoplasti­schen Kunststoff, dessen Wärmekapazität gering ist.To improve the heat transfer, the housing advantageously consists of a dark-colored, thermoplastic material, the heat capacity of which is low.

Die Thermobimetall-Schnappscheibe weist einen rechteckigen Grundriß auf. Dieser Grundriß läßt sich einfach herstellen und ergibt günstige Schnapp-Eigenschaften.The bimetallic snap disk has a rectangular layout. This floor plan is easy to produce and gives favorable snap properties.

Nach einem weiteren Merkmal der Erfindung ist die Kontakt­fahne auf dem Boden des Unterteiles befestigt.According to a further feature of the invention, the contact tab is attached to the bottom of the lower part.

Zweckmäßig steckt die Kontaktfahne mit einem Halteloch auf einem Haltezapfen, welcher am Boden des Unterteiles vorgesehen ist.The contact lug is expediently inserted with a holding hole on a holding pin which is provided on the bottom of the lower part.

Zweckmäßig ist die Kontaktfahne am Haltezapfen durch ther­mische Verformung von dessen Kopf angenietet.The contact lug is expediently riveted to the holding pin by thermal deformation of its head.

In weiterer Ausgestaltung der Erfindung steckt die Kon­taktfeder mit einem Befestigungsloch auf einem Befestigungs­zapfen, welcher am Boden des Unterteiles des Gehäuses vor­gesehen ist. Diese Maßnahme gestattet eine einfache Montage.In a further embodiment of the invention, the contact spring with a fastening hole is placed on a fastening pin which is provided on the bottom of the lower part of the housing. This measure allows easy assembly.

Zur Halterung der Kontaktfeder am Unterteil des Gehäuses ist diese an dem Befestigungszapfen angenietet, was wiederum durch thermische Verformung von dessen freiem Ende geschieht.To hold the contact spring on the lower part of the housing, the latter is riveted to the fastening pin, which in turn occurs through thermal deformation of the free end thereof.

Zur Fixierung von ihrer Lage im Unterteil ist die Kontakt­feder zweckmäßig neben dem Befestigungszapfen zweimal ge­gensinnig rechtwinklig abgebogen.In order to fix their position in the lower part, the contact spring is expediently bent twice at right angles next to the fastening pin.

Vorteilhaft trägt der Deckel innenseitig einen Passbolzen welcher in ein Passloch im Unterteil des Gehäuses ein­greift. Damit ist die gegenseitige Lage von Deckel und Unterteil eindeutig festgelegt.The inside of the cover advantageously carries a fitting bolt which engages in a fitting hole in the lower part of the housing. This clearly defines the mutual position of the cover and base.

Als Abschluß des Gehäuses und zur zusätzlichen Halterung der Kontaktfahne und der Kontaktfeder weist der Deckel unterseits ein Wandteil auf, das neben dem Befestigungs­zapfen zwischen die beiden Seitenwände des Unterteiles eingreift.At the end of the housing 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.

Im Unterteil des Gehäuses können zwei gegenüberliegende Schultern vorgesehen sein. Diese Schultern dienen zur Führung der Kontaktfahne und der Kontaktfeder beim Ein­legen in das Unterteil während der Montage.Two opposite shoulders can be provided in the lower part of the housing. These shoulders serve to guide the contact lug and the contact spring when inserting it into the lower part during assembly.

Zweckmäßig weist der Boden des Unterteils des Gehäuses eine Schräge auf. Diese Schräge dient zur Erhöhung der mechanischen Festigkeit des Gehäuses 1.The bottom of the lower part of the housing expediently has a slope. This slope serves to increase the mechanical strength of the housing 1 .

Die Erfindung wird nachstehend an einem Ausführungsbei­spiel anhand der beigefügten Zeichnung näher erläutert. Es zeigen

  • Fig. 1 einen Thermobimetallschalter in einer Draufsicht bei aufgeschnittenem Deckel, in stark vergrößerter Darstellung;
  • Fig. 2 den Thermobimetallschalter nach Fi­gur 1 in einem Längsschnitt, geschnit­ten entlang der Linie II - II in Fi­gur 1.
The invention is explained below using an exemplary embodiment with reference to the accompanying drawings. Show it
  • Figure 1 is a thermobimetal switch in a plan view with the lid cut, in a greatly enlarged representation.
  • 2 shows the thermobimetal switch according to FIG. 1 in a longitudinal section, cut along the line II-II in FIG. 1.

Der in der Zeichnung wiedergegebene Thermobimetallschal­ter besteht im wesentlichen aus einem allseits geschlosse­nen Gehäuse 1 mit einem Unterteil 2 und einem Deckel 3, einer Kontaktfahne 4, einer Thermobimetall-Schnappschei­be 5 einer Kontaktfeder 6.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 .

Das aus einem dunkel - vorzugsweise schwarz - eingefärbten Kunststoff durch Formpressen hergestellte Gehäuse 1 weist die Form eines langgestreckten Prismas mit techteckiger Grundfläche auf und ist allseitig geschlossen. Das Ge­häuse besteht aus dem Unterteil 2 und dem Deckel 3.The housing 1 produced 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 .

Das Unterteil 2 besitzt die Gestalt einer länglich-recht­eckigen, niederen Wanne und weist zwei parallele Seiten­wände 7 und 8 auf, die durch eine Stirnwand 9 miteinander verbunden sind. Zwischen den beiden Seitenwänden 7 und 8 erstreckt sich ein Boden 10, der eine Schräge 11 aufweist.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 floor 10, which has a slope 11, extends between the two side walls 7 and 8.

Am Unterteil 2 des Gehäuses 1 steht innen ein zylindrischer Zapfen 12 hervor. Dieser Zapfen 12 besitzt eine ballige Oberfläche und ist an der Innenseite 13 des Unterteiles 2 - und zwar auf der Schräge 11 des Bodens 10 - angeformt und er steht senkrecht zum Boden 10.On the lower part 2 of the housing 1 , 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.

Am Boden 10 des Unterteiles 2 ist nahe der Seitenwand 7 ein zylindrischer Haltezapfen 14 vorgesehen, welcher am Boden 10 angeformt ist. Desweiteren ist am Boden 10 auf der Schräge 11 ein zylindrischer Befestigungszapfen 15 angeordnet, welcher auf der Schräge 11 angeformt ist.At the bottom 10 of the lower part 2 near the side wall 7, a cylindrical retaining pin 14 is provided, which is molded onto the bottom 10. Furthermore, a cylindrical fastening pin 15 is arranged on the bottom 10 on the slope 11, which is integrally formed on the slope 11.

Im Unterteil 2 des Gehäuses 1 sind an der Stirnwand 9 zwei Schultern 16 und 17 angeformt, welche einander gegenüber liegen und die eine im Grundriß bogenförmige Ausnehmung 18 bilden.In the lower part 2 of the housing 1 , 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.

Der Deckel 3 des Gehäuses 1 besitzt einen länglich-recht­eckigen grundriß, welcher mit demjenigen des Bodens 10 übereinstimmt. Dieser Deckel 3 schließt das Unterteil 2 ab und ist an seinem äußeren Rand ringsum mit den Ober­kanten der Seitenwände 7 und 8 sowie der Stirnwand 9 ver­schweißt. Der Deckel 3 trägt an seiner Unterseite 19 ein Wandteil 20, welches im Grundriß L-förmig ausgebildet ist und neben dem Befestigungszapfen 15 und zwischen die beiden Seitenwände 7 und 8 des Unterteiles 2 formschlüs­sig eingreift.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 .

Der Deckel 3 trägt innen einen zylindrischen Passbolzen 21, der in ein Passloch 22 des Unterteiles 2 eingreift, das hinter der Schulter 17 vorgesehen ist.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.

Die Kontaktfahne 4 besteht aus Kupfer, Messing oder Neu­silber und liegt eben auf der Innenseite 13 des Bodens 10 des Unterteiles 2 auf und sie ist dort befestigt. Diese Kontaktfahne 4 weist einen langen, geraden Schenkel 24 auf, der in einen ebenfalls geraden, under einem stumpfen Winkel abgeknickten Schenkel 25 übergeht, dessen Ende 26 in die Ausnehmung 18 hineinragt. Zu ihrer Befestigung weist die Kontaktfahne 4 ein Halteloch 27 auf, mit welchem sie auf dem Haltezapfen 14 des Unterteiles 2 steckt und durch thermische Verformung des freien Endes des Haltezapfens 14 angenietet ist.The contact tab 4 is made of copper, brass or nickel silver and is just on the inside 13 of the bottom 10 of the lower part 2 and it is attached 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. For their attachment, 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.

Am Ende 26 der Kontaktfahne 4 ist eine kleine Scheibe aus Silber oder einem anderen Kontaktmaterial als fester kontakt 28 einplattiert.At the end 26 of the contact lug 4 , a small disk made of silver or another contact material is plated as a fixed contact 28.

Die Thermobimetall-Schnappscheibe 5 besitzt einen im we­sentlichen rechteckigen Grundriß mit zwei parallelen Längs­seiten 29 und 30 sowie zwei schwach gekrümmt ausgebildeten Schmalseiten 31 und 32; diese Thermobimetall-Schnappschei­be 5 ist schwach gewölbt und sie springt unter Erwärmung bei einer vorgesehenen Temperatur um.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.

Die Thermobimetall-Schnappscheibe 5 ist lose in das Unter­teil 2 zwischen die Seitenwände 7 und 8, die Schultern 17 und 18 sowie den Befestigungszapfen 15 eingelegt und sie liegt der Kontaktfeder 6 gegenüber. Die Thermobimetall-­Schnappscheibe 5 liegt somit zwischen der Kontaktfahne 4 und der Kontaktfeder 6.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 .

Mit der Mitte ihrer konkaven Seite 33 liegt die Thermobi­metall-Schnappscheibe 5 auf dem Zapfen 12 auf. Schnappt die Thermobimetall-Schnappscheibe 5 infolge Temperatur­erhöhung um, wird die konkave Seite 33 konvex und der der Ausnehmung 18 gegenüberliegende Rand der Thermobi­metall-Schnappscheibe 5 drückt die vorgespannte Kontakt­feder 6 hoch, sodaß der Kontakt geöffnet wird.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.

Die aus einem federelastischen Material hergestellte Kon­taktfeder 6 ist im Grundriß leicht trapezförmig aus­ gebildet und sie geht in eine schmale Anschlußfahne 34 über. An ihrem freien Ende 35 trägt die Kontaktfeder 6 einen Gegenkontakt 36, welcher angenietet ist und mit dem festen Kontakt 28 zusammenarbeitet. Das Ende 35 ragt in die Ausnehmung 18 des Unterteiles 2 hinein.The contact spring 6 made of a resilient material is slightly trapezoidal in plan formed 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 .

Die Kontaktfeder 6 ist dicht neben dem Befestigungs­zapfen 15 zweimal gegensinnig rechtwinklig abgebogen und sie trägt ein Befestigungsloch 37, mit dem sie auf dem Befestigungszapfen 15 steckt. Durch thermische Verfor­mung des Endes 38 des Befestigungszapfens 15 ist die Kon­taktfeder 6 am Unterteil 2 des Gehäuses 1 angenietet.The contact spring 6 is bent twice at right angles next to the mounting pin 15 in opposite directions and it carries a mounting hole 37 with which it is inserted on the mounting pin 15. Due to thermal deformation of the end 38 of the fastening pin 15, the contact spring 6 is riveted to the lower part 2 of the housing 1 .

Am freien Ende des geraden Schenkels 24 der Kontaktfah­ne 4 und an der Anschlußfahne 34 der Kontaktfeder 6 sind die Kupferleiter 39 von isolierten, elektrischen Zufüh­rungslitzen 40 durch Löten oder Schweißen befestigt. Der Hohlraum zwischen den Enden der beiden Seitenwände 7 und 8 des Unterteiles 2 und der Außenseite des Wandteiles 20 des Deckels 3 ist mit einer elektrisch isolierenden, wärme­unempfindlichen Vergußmasse 41 ausgefüllt.At the free end of the straight leg 24 of the contact lug 4 and on the connecting lug 34 of the contact spring 6 , the copper conductors 39 of insulated, electrical feed 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.

Die Montage des vorgeschlagenen Thermobimetallschalters gent einfach vor sich. Es werden nacheinander und überein­ander in das Unterteil 2 des Gehäuses 1 die Kontaktfahne 4, die Thermobimetall-Schnappscheibe 5 und die Kontaktfeder 6 eingelegt wobei die Enden des Haltezapfens 14 sowie des Be­festigungszapfens 15 über der Kontaktfahne 4 und der Kontakt­feder 6 mit einen Werkzeug thermisch verformt werden. Der Deckel 3 wird aufgesetzt und ringsum mit dem Unterteil 2 verschweißt oder verklebt, zuletzt wird die Vergußmasse 41 eingefüllt.The assembly of the proposed bimetallic switch is simply in front of you. The contact lug 4 , the bimetallic snap disk 5 and the contact spring 6 are inserted one after the other and one above the other in the lower part 2 of the housing 1 , the ends of the holding pin 14 and the fastening pin 15 being thermally deformed using a tool via the contact lug 4 and the contact spring 6 . The lid 3 is put on and welded or glued all around to the lower part 2 , finally the casting compound 41 is filled.

Claims (14)

1. Thermobimetallschalter, mit einem geschlosse­nen Gehäuse mit einem Deckel und einem wannenförmigen Unterteil, in welchem eine Kontaktfahne mit einem festen Kontakt und eine streifenförmige Kontaktfeder mit einem beweglichen Gegenkontakt sowie eine gewölbte Thermobi­metall-Schnappscheibe, die der Kontaktfeder gegenüber­liegt, angeordnet sind, dadurch gekenn­zeichnet, daß am Unterteil (2) des Gehäuses (1) innen ein Zapfen (12) hervorsteht, daß die Thermobimetall-­Schnappscheibe (5) lose im Unterteil (2) sitzt und daß die Thermobimet, daß der Zapfen (12) an der Innenseite (13) des Unterteiles (2) angeformt ist.1.Bimetallic switch, with a closed housing with a cover and a trough-shaped 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 a curved thermobimetal snap disk, which is opposite the contact spring, are arranged, characterized in that that on the lower part ( 2 ) of the housing ( 1 ) a pin (12) protrudes on the inside, that the bimetallic snap disk ( 5 ) is loosely seated in the lower part ( 2 ) and that the bimetube that the pin (12) on the inside (13 ) of the lower part ( 2 ) is formed. 3. Thermobimetallschalter nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß der Unterteil (2) länglich-rechteckig wannenförmig ausgebildet ist und zwischen einem Boden (10) zwei parallele Seiten­wände (7 und 8) sowie eine diese verbindende Stirnwand (9) aufweist.3. Bimetallic switch according to claims 1 or 2, characterized in that the lower part ( 2 ) is elongated-rectangular trough-shaped and between a bottom (10) has two parallel side walls (7 and 8) and a connecting end wall (9). 4. Thermobimetallschalter nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß das Gehäuse (1) aus einem dunkel eingefärbten, thermoplasti­schen Kunststoff besteht.4. bimetallic switch according to claims 1 to 3, characterized in that the Housing ( 1 ) consists of a dark-colored, thermoplastic. 5. Thermobimetallschalter nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Thermobimetall-Schnappscheibe (5) einen rechteckigen Grundriß aufweist.5. Bimetallic switch according to claims 1 to 4, characterized in that the bimetallic snap disk ( 5 ) has a rectangular plan. 6. Thermobimetallschalter nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet,,daß die Kontaktfahne (4) auf dem Boden (10) des Unterteiles (2) befestigt ist.6. bimetallic switch according to claims 1 to 5, characterized in that the contact tab ( 4 ) on the bottom (10) of the lower part ( 2 ) is attached. 7. Thermobimetallschalter nach Anspruch 6, dadurch gekennzeichnet, daß die Kontaktfahne (4) mit einem Halteloch (27) auf einem Halte­zapfen (14) steckt, welcher am Boden (10) des Untertei­les (2) vorgesehen ist.7. bimetallic switch according to claim 6, characterized in that the contact tab ( 4 ) with a holding hole (27) on a holding pin (14) which is provided on the bottom (10) of the lower part ( 2 ). 8. Thermobimetallschalter nach Anspruch 7, dadurch gekennzeichnet, daß die Kontaktfahne (4) am Haltezapfen (14) angenietet ist.8. Bimetallic switch according to claim 7, characterized in that the contact tab ( 4 ) on the retaining pin (14) is riveted. 9. Thermobimetallschalter nach den Ansprüchen 1 bis 8, dadurch gekennzeichnet, daß die Kontaktfeder (6) mit einem Befestigungsloch (37) auf einem Befestigungszapfen (15) steckt, welcher am Bo­den (10) des Unterteiles (2) vorgesehen ist.9. bimetallic switch according to claims 1 to 8, characterized in that the contact spring ( 6 ) with a mounting hole (37) on a mounting pin (15) which is provided on the bottom (10) of the lower part ( 2 ). 10. Thermobimetallschalter nach Anspurch 9, dadurch gekennzeichnet, daß die Kontaktfeder (6) am Befestigungszapfen (15) angenietet ist.10. Bimetallic switch according to Anspurch 9, characterized in that the contact spring ( 6 ) is riveted to the mounting pin (15). 11. Thermobimetallschalter nach Anspruch 10, dadurch gekennzeichnet, daß die Kontaktfeder (6) neben dem Befestigungszapfen (15) zwei­mal, gegensinnig rechtwinklig abgebogen ist.11. Bimetallic switch according to claim 10, characterized in that the contact spring ( 6 ) next to the mounting pin (15) is bent twice, in opposite directions at right angles. 12. Thermobimetallschalter nach den Ansprüchen 1 bis 11, dadurch gekennzeichnet, daß der Deckel (3) innenseitig einen Passbolzen (21) trägt, wel­cher in ein Passloch (22) im Unterteil (2) eingreift.12. Bimetallic switch according to claims 1 to 11, characterized in that the cover ( 3 ) on the inside carries a fitting bolt (21) which engages in a fitting hole (22) in the lower part ( 2 ). 13. Thermobimetallschalter nach den Ansprüchen 1 bis 12, dadurch gekennzeichnet, daß der Deckel (3) unterseits ein Wandteil (20) aufweist, das neben dem Befestigungszapfen (15) zwischen die beiden Seitenwände (7 und 8) des Unterteiles (2) eingreift.13. Bimetallic switch according to claims 1 to 12, characterized in that the cover ( 3 ) on the underside has a wall part (20) which engages in addition to the fastening pin (15) between the two side walls (7 and 8) of the lower part ( 2 ). 14. Thermobimetallschalter nach den Ansprüchen 1 bis 13, dadurch gekennzeichne, daß im Unterteil (2) des Gehäuses (1) gegenüberliegende Schultern (16 und 17) vorgesehen sind.14. Bimetallic switch according to claims 1 to 13, characterized in that in the lower part ( 2 ) of the housing ( 1 ) opposite shoulders (16 and 17) are provided. 15. Thermonimetallschalter nach den Ansprüchen 1 bis 14, dadurch gekennzeichnet, daß der Boden (10) des Unterteiles (2) des Gehäuses (1) eine Schräge (11) aufweist.15. Thermonimetal switch according to claims 1 to 14, characterized in that the bottom (10) of the lower part ( 2 ) of the housing ( 1 ) has a slope (11).
EP87115719A 1987-10-27 1987-10-27 Thermal bimetallic switch Expired - Lifetime EP0313674B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8714253U DE8714253U1 (en) 1987-10-27 1987-10-27 Thermobimetal switch
DE8787115719T DE3783769D1 (en) 1987-10-27 1987-10-27 THERMOBI METAL SWITCH.
AT87115719T ATE84911T1 (en) 1987-10-27 1987-10-27 THERMAL BIMETAL SWITCH.
EP87115719A EP0313674B1 (en) 1987-10-27 1987-10-27 Thermal bimetallic switch

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8714253U DE8714253U1 (en) 1987-10-27 1987-10-27 Thermobimetal switch
EP87115719A EP0313674B1 (en) 1987-10-27 1987-10-27 Thermal bimetallic switch

Publications (2)

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

Family

ID=25952148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87115719A Expired - Lifetime EP0313674B1 (en) 1987-10-27 1987-10-27 Thermal bimetallic switch

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EP (1) EP0313674B1 (en)
DE (1) DE8714253U1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19547526A1 (en) * 1994-12-09 1996-06-13 Uchiya Thermostat thermostat
EP0773595A1 (en) * 1995-10-09 1997-05-14 Wako Electronics Co., Ltd. Safety device for use in secondary battery
DE19546005A1 (en) * 1995-12-09 1997-06-12 Hofsaes Marcel Switch with a temperature-dependent switching mechanism
DE19705154A1 (en) * 1997-02-11 1998-08-20 Thermik Geraetebau Gmbh Temperature-dependent switch with a bimetal switch mechanism
US6633222B2 (en) * 2000-08-08 2003-10-14 Furukawa Precision Engineering Co., Ltd. Battery breaker

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Publication number Priority date Publication date Assignee Title
DE8801497U1 (en) * 1988-02-06 1988-07-07 Limitor GmbH, 7530 Pforzheim Bimetal temperature switch

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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 (en) * 1976-12-04 1977-04-28 Eberle Werke Kg, 8500 Nuernberg Electrical switchgear
DE3141226A1 (en) * 1980-12-10 1982-06-24 Matsushita Electric Works Ltd., Kadoma, Osaka "THERMAL SWITCH"
EP0058372A1 (en) * 1981-02-11 1982-08-25 Limitor AG Thermal switch with bimetallic element
EP0126957A2 (en) * 1983-05-27 1984-12-05 Microtherm GmbH Thermostatic switch

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* 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 (en) * 1976-12-04 1977-04-28 Eberle Werke Kg, 8500 Nuernberg Electrical switchgear
DE3141226A1 (en) * 1980-12-10 1982-06-24 Matsushita Electric Works Ltd., Kadoma, Osaka "THERMAL SWITCH"
EP0058372A1 (en) * 1981-02-11 1982-08-25 Limitor AG Thermal switch with bimetallic element
EP0126957A2 (en) * 1983-05-27 1984-12-05 Microtherm GmbH Thermostatic switch

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19547526C2 (en) * 1994-12-09 2000-01-05 Uchiya Thermostat Bimetal temperature switch
DE19547526A1 (en) * 1994-12-09 1996-06-13 Uchiya Thermostat thermostat
US5766793A (en) * 1995-10-09 1998-06-16 Wako Electronics Co., Ltd. Safety device for use in secondary battery
EP0773595A1 (en) * 1995-10-09 1997-05-14 Wako Electronics Co., Ltd. Safety device for use in secondary battery
US5867084A (en) * 1995-12-09 1999-02-02 Hofsaess; Marcel Switch having a temperature-dependent switching mechanism
EP0778599A3 (en) * 1995-12-09 1998-05-27 Marcel Hofsäss Switch with a temperature sensitive switching mechanism
DE19546005C2 (en) * 1995-12-09 1999-07-08 Hofsaes Marcel Switch with a temperature-dependent switching mechanism
DE19546005A1 (en) * 1995-12-09 1997-06-12 Hofsaes Marcel Switch with a temperature-dependent switching mechanism
DE19705154A1 (en) * 1997-02-11 1998-08-20 Thermik Geraetebau Gmbh Temperature-dependent switch with a bimetal switch mechanism
EP0858090A3 (en) * 1997-02-11 1999-05-26 Thermik Gerätebau GmbH Thermostat switch with a bimetal switch device
DE19705154C2 (en) * 1997-02-11 1999-06-02 Thermik Geraetebau Gmbh Temperature-dependent switch with a bimetal switch mechanism
US6064295A (en) * 1997-02-11 2000-05-16 Thermik Geratebau Gmbh Temperature-dependent switch having a bimetallic switching mechanism
US6633222B2 (en) * 2000-08-08 2003-10-14 Furukawa Precision Engineering Co., Ltd. Battery breaker

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Publication number Publication date
DE8714253U1 (en) 1987-12-17
EP0313674B1 (en) 1993-01-20

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