EP0275517B1 - Überstromschutz-Schnappschalter für Haushaltsgeräte - Google Patents

Überstromschutz-Schnappschalter für Haushaltsgeräte Download PDF

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Publication number
EP0275517B1
EP0275517B1 EP87118881A EP87118881A EP0275517B1 EP 0275517 B1 EP0275517 B1 EP 0275517B1 EP 87118881 A EP87118881 A EP 87118881A EP 87118881 A EP87118881 A EP 87118881A EP 0275517 B1 EP0275517 B1 EP 0275517B1
Authority
EP
European Patent Office
Prior art keywords
contact
quick release
release according
overload
current
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
EP87118881A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0275517A2 (de
EP0275517A3 (en
Inventor
Rolf Pirdzuns
Wolfgang Dr. Polligkeit
Michael Dr. Schluckebier
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.)
Vorwerk and Co Interholding GmbH
Original Assignee
Vorwerk and Co Interholding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vorwerk and Co Interholding GmbH filed Critical Vorwerk and Co Interholding GmbH
Priority to AT87118881T priority Critical patent/ATE83337T1/de
Publication of EP0275517A2 publication Critical patent/EP0275517A2/de
Publication of EP0275517A3 publication Critical patent/EP0275517A3/de
Application granted granted Critical
Publication of EP0275517B1 publication Critical patent/EP0275517B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/04—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrothermal opening

Definitions

  • the invention relates to an overcurrent protection snap-action switch for household appliances, in particular floor care devices, with contact-fixing fixed on one side, which at the same time contains the power connection and, on the other hand, with an interrupter contact part, the contact system also being designed as a power connection and the contact spring by means of a metal center strip in one of two end positions is held by the metal central strip is subjected to tension, is designed as a resistance element and the metal edge strips are prestressed, so that when the resistance element is cold, the contacts snap into contact and when the resistance element heats up due to current flow, the contacts snap into a de-energized position with separation and after the resistance element has cooled down the original contact position can be restored by means of an externally actuated reset button.
  • overcurrent protection snap-action switches have the purpose of suddenly protecting household appliances, in particular floor care devices, from overcurrent damage when the electric motor is blocked, by automatically interrupting the power supply immediately and restoring the normal operating state only after manual reset.
  • Such overcurrent protection snap-action switches are known from DE-PS 1 513 242.
  • This document describes such a switch of the type mentioned in the introduction, in which two movable contact arms are arranged in parallel, the ends of which are on the one hand in a two-part receptacle and which are free floating opposite side carries a contact.
  • the thin central tongue is electrically conductive at a connection point, but is only positively fixed.
  • the contact side transfers the electrical energy to the second connection point by means of spring pressure via a contact.
  • the thin central tongue forms an electrical resistance element which expands in accordance with the value exceeding the nominal current and can snap the free contact from its first end position into the de-energized position with the contact pieces separated.
  • the reset is carried out by means of a reset that can be operated manually from the outside.
  • the invention has for its object to provide an overcurrent protection snap-action switch of the type mentioned, which, while avoiding the aforementioned shortcomings, ensures a safe, long-lasting switching time in the aforementioned devices, the arc occurring only being conducted to the designated locations and the mechanical stress on the thin central tongue is reduced.
  • the contact spring (1) finds its position in the adjustable contact receptacle (14), which consists of the contact bottom (14a) and the contact top (14b). Between the two is in the rear area divided prism hole (15), into which adjusting mandrels (16) of different diameters are introduced in order to keep the contact area (27) constant.
  • Fig. 2 the front view of the contact bottom (14a) is shown.
  • the U-shaped outer webs (2a, 2b) of the contact spring (1) are inserted into the receptacles (13a, 13b) flattened on one side and held in a form-fitting manner.
  • the thin center tongue (3) then lies in the V-shaped notch (28) and is hung behind the upper part of the connection pole (24) in the contact area (27) with the retaining web (2a), so that the contact spring (1) is mechanically defined held in the adjustable contact receptacle (14) and electrically connected to the connection pole (24).
  • the contact spring (1) On the opposite side, the contact spring (1) is kept free and carries on its contact support surface (6) the contact (7), with its contact support surface (6 '), which in its working end position rests against the front area (10) of the contact tongue and thus the current flow guaranteed to the connection pole (25).
  • an overcurrent protection switch (19) according to the invention is shown, in which the contact spring (1), the adjustable contact (14) and the fixed contact tongue with the associated mating contact (7) are installed on the inside.
  • the contact (14) is supported against a base (20) and carries a return spring (21) for the reset button (22) in the abutment area (20a).
  • This reset button (22) is recessed in the area of the thin center tongue (3) so that its longer side webs (23) come into contact with the U-shaped outer webs (2a, 2b) of the contact spring (1) when the button (22) is pressed reach.
  • the outer webs (2a, 2b) are pressed down, whereas the thin central web (3) is held in the contact (14).
  • the outer webs (2a, 2b) snap through and the contact (7) closes with the fixed contact tongue, so that an electrical contact between the connection poles (24 and 25) is established.
  • the contact spring (1) increases as a result of a fault in the consumer (not shown here)
  • the thin central tongue (3) heats up due to resistance and expands.
  • the contact spring (1) snaps back into the previous state and separates the contacts (9) and (7) from one another.
  • the molding (4) in the U-bottom (5) of the outer webs (2a, 2b) is subjected to bending.
  • the contact support surface (6) of the contact (7) is designed in the shape of a spherical segment and the front area (10) of the contact tongue is surrounded by an insulating piece (11) integrally molded on the switch housing (12). This ensures that the arc (18) cannot move in the direction of the thin center tongue (3).

Landscapes

  • Thermally Actuated Switches (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Tumbler Switches (AREA)
  • Push-Button Switches (AREA)
EP87118881A 1987-01-17 1987-12-19 Überstromschutz-Schnappschalter für Haushaltsgeräte Expired - Lifetime EP0275517B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87118881T ATE83337T1 (de) 1987-01-17 1987-12-19 Ueberstromschutz-schnappschalter fuer haushaltsgeraete.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3701275 1987-01-17
DE19873701275 DE3701275A1 (de) 1987-01-17 1987-01-17 Ueberstromschutz-schnappschalter fuer haushaltsgeraete

Publications (3)

Publication Number Publication Date
EP0275517A2 EP0275517A2 (de) 1988-07-27
EP0275517A3 EP0275517A3 (en) 1990-01-03
EP0275517B1 true EP0275517B1 (de) 1992-12-09

Family

ID=6319009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87118881A Expired - Lifetime EP0275517B1 (de) 1987-01-17 1987-12-19 Überstromschutz-Schnappschalter für Haushaltsgeräte

Country Status (6)

Country Link
US (1) US4821009A (enrdf_load_stackoverflow)
EP (1) EP0275517B1 (enrdf_load_stackoverflow)
JP (1) JPS63190223A (enrdf_load_stackoverflow)
AT (1) ATE83337T1 (enrdf_load_stackoverflow)
DE (2) DE3701275A1 (enrdf_load_stackoverflow)
ES (1) ES2037066T3 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004001781A1 (en) * 2002-06-25 2003-12-31 Gerard Industries Pty Ltd Improved electrical switch

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2115086T3 (es) * 1993-03-17 1998-06-16 Ellenberger & Poensgen Interruptor proteccion.
US5420561A (en) * 1994-01-21 1995-05-30 Littlefuse, Inc. Breaker or resettable fuse device
CN102931019B (zh) * 2012-10-25 2015-05-20 昌辉汽车电器（黄山）股份公司 一种组合开关控制变光功能的机械结构

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD35990A (enrdf_load_stackoverflow) *
US2200108A (en) * 1938-08-10 1940-05-07 Heinemann Circuit Breaker Comp Blow-out mechanism
US2913557A (en) * 1956-10-22 1959-11-17 Westinghouse Electric Corp Circuit interrupter
US3037102A (en) * 1961-02-06 1962-05-29 Schmidinger Joseph Snap switch
JPS494706B1 (enrdf_load_stackoverflow) * 1964-12-30 1974-02-02
DE2621478B2 (de) * 1976-05-14 1978-03-02 Siemens Ag, 1000 Berlin Und 8000 Muenchen Lichtbogenlöscheinrichtung für Gleichstromschaltgeräte
US4325046A (en) * 1980-04-04 1982-04-13 B/K Patent Development, Inc. Circuit breaker
FR2491676A1 (fr) * 1980-10-03 1982-04-09 Thomson Csf Relais electromagnetique
HU184008B (en) * 1982-07-29 1984-06-28 Huetoegepgyar Bimetal switch particularly for protecting compressor motors of refrigerators
GB2125626B (en) * 1982-08-07 1986-04-03 Terence Henry Taylor Arc interruption in air break switch
DE3337562A1 (de) * 1983-10-15 1985-04-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Loescheinrichtung fuer einen leitungsschutzschalter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004001781A1 (en) * 2002-06-25 2003-12-31 Gerard Industries Pty Ltd Improved electrical switch

Also Published As

Publication number Publication date
DE3783025D1 (de) 1993-01-21
ES2037066T3 (es) 1993-06-16
DE3701275A1 (de) 1988-07-28
EP0275517A2 (de) 1988-07-27
JPS63190223A (ja) 1988-08-05
EP0275517A3 (en) 1990-01-03
DE3701275C2 (enrdf_load_stackoverflow) 1990-05-31
US4821009A (en) 1989-04-11
ATE83337T1 (de) 1992-12-15

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