EP1137030A1 - Unité de commutation pour des moyens de sécurité dans des appareils menagers - Google Patents

Unité de commutation pour des moyens de sécurité dans des appareils menagers Download PDF

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Publication number
EP1137030A1
EP1137030A1 EP01106430A EP01106430A EP1137030A1 EP 1137030 A1 EP1137030 A1 EP 1137030A1 EP 01106430 A EP01106430 A EP 01106430A EP 01106430 A EP01106430 A EP 01106430A EP 1137030 A1 EP1137030 A1 EP 1137030A1
Authority
EP
European Patent Office
Prior art keywords
bimetal strip
spring
strip
ptc resistor
switching unit
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
EP01106430A
Other languages
German (de)
English (en)
Other versions
EP1137030B1 (fr
Inventor
Oton Leban
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.)
Illinois Tool Works Inc
Original Assignee
Metalflex Druzba Za Proizvodnjo Industrijske Opreme d o o
ITW Appliance Components doo
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 Metalflex Druzba Za Proizvodnjo Industrijske Opreme d o o, ITW Appliance Components doo filed Critical Metalflex Druzba Za Proizvodnjo Industrijske Opreme d o o
Publication of EP1137030A1 publication Critical patent/EP1137030A1/fr
Application granted granted Critical
Publication of EP1137030B1 publication Critical patent/EP1137030B1/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
    • H01H37/10—Compensation for variation of ambient temperature or pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/06—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts

Definitions

  • the invention concerns an electric switching unit for a security means in household appliances, wherein a PTC resistor is inserted between a bistable switching spring, whereto a security means blocking element is attached, and a bimetal strip and wherein, at a possible elevated temperature of the appliance, the PTC resistor displacement towards the bistable switching spring as accomplished by the bimetal strip is compensated for in a more precise manner.
  • the applicant manufactures a security means for use in household appliances. It is provided with a suitable electric switching unit.
  • This unit comprises a PTC resistor, a bimetal strip connected to a first connecting terminal of the unit, a compensating bimetal strip and a bistable switching spring, which is connected to a second connecting terminal of the unit.
  • the bistable switching spring is composed of a strip spring and a hoop spring, which at one end are rigidly joined to each other and fastened to a casing of the electric switching unit, whereas, close to the free end, they are elastically joined by a coupling spring.
  • the PTC resistor is inserted between the bimetal strip and the strip spring, the position of which is decisive for the jumping over of the hoop spring from one stable position into another one, and it has an electric contact with both of them.
  • a security means blocking element is inclinably mounted to the free end of the hoop spring.
  • the ends of the bimetal strip are leaned against the ends of the compensating bimetal strip which compensates for the PTC resistor displacement due to the elevated appliance temperature,
  • the proximity of the compensating bimetal strip to the PTC resistor and a good thermal contact therewith through both ends of the bimetal strip result in the compensating bimetal strip being too strongly influenced by the PTC resistor temperature, which overshadows the influence of the appliance temperture.
  • the technical problem to be solved by the present invention is how to improve the sensing of the appliance temperature by means of a compensating bimetal strip so that by a properly placing it with respect to a bimetal strip the influence of the temperature of a PTC resistor supported by the bimetal strip is reduced.
  • An electric switching unit and provided for a security means in household appliances is represented in the Figure in sectional view. It comprises a PTC resistor 1, a bimetal strip 2 connected to a first connecting terminal of the electric switching unit, a compensating bimetal strip 21 and a bistable switching spring 3, which is connected to a second connecting terminal of the electric switching unit.
  • the bistable switching spring 3 is made up of a strip spring 31 and a hoop spring 32.
  • the springs 31 and 32 are rigidly joined to each other at one end and fastened to a casing of the electric switching unit, whereas, close to the free end they are elastically joined by a coupling spring 33.
  • the hoop spring 32 of the bistable switching spring 3 jumps over from one stable position into another one.
  • the PTC resistor 1 is inserted between the bimetal strip 2, preferentially in the middle of the bimetal strip 2, and the strip spring 31, the position of which is decisive for the jumping over of the bistable switching spring 3.
  • the PTC resistor 1 has an electric contact with the bimetal strip 2 and also with the hoop spring 32 through a contact 311 mounted thereon.
  • a security means blocking element 4 is inclinably mounted to the free end of the hoop spring 32, which is provided with a movable contact 321 close to said free end.
  • a first end of the bimetal strip 2 is leaned against an adjusting screw 22 and the second end thereof is leaned against the compensating bimetal strip 21, preferentially in the middle of the compensating bimetal strip 21, both ends of which are leaned against the casing of the electric switching unit.
  • the electric current tlows through the PTC resistor 1 warming it up.
  • the bimetal strip 2 which is in touch with the PTC resistor 1, gets warm too and pushes the PTC resistor 1 towards the strip spring 31.
  • the strip spring 31 undergoes a certain displacement, the hoop spring 32 jumps over into another stable position and the blocking element 4 is moved in direction 41 to a blocking position.
  • the compensating bimetal strip 21 compensates for the said displacement for a contribution resulting from the elevated appliance temperature. Therefore the PTC resistor 1 should only slightly influence the temperature of the compensating bimetal strip 21. Namely, the compensating bimetal strip 21 must sense the temperature of the appliance wherein the security means is placed. This is accomplished by the length of the bimetal strip 2 sufficiently exceeding the diameter of the PTC resistor 1 so that the warmed up PTC resistor 1 does not exert too Strong influence upon the compensating bimetal strip 21.

Landscapes

  • Thermally Actuated Switches (AREA)
  • Thermistors And Varistors (AREA)
  • Fire-Detection Mechanisms (AREA)
EP20010106430 2000-03-23 2001-03-22 Unité de commutation pour des moyens de sécurité dans des appareils menagers Expired - Lifetime EP1137030B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SI200000081 2000-03-23
SI200000081A SI20537A (sl) 2000-03-23 2000-03-23 Električni stikalni sklop za varnostno pripravo v stroju

Publications (2)

Publication Number Publication Date
EP1137030A1 true EP1137030A1 (fr) 2001-09-26
EP1137030B1 EP1137030B1 (fr) 2003-02-19

Family

ID=20432627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010106430 Expired - Lifetime EP1137030B1 (fr) 2000-03-23 2001-03-22 Unité de commutation pour des moyens de sécurité dans des appareils menagers

Country Status (4)

Country Link
EP (1) EP1137030B1 (fr)
DE (1) DE60100104T2 (fr)
ES (1) ES2192550T3 (fr)
SI (1) SI20537A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1550759A2 (fr) * 2003-12-18 2005-07-06 ITW Metalflex d.o.o. Tolmin Dispositif de sécurité dans un appareil ménager
EP1645706A2 (fr) * 2004-10-06 2006-04-12 ITW Metalflex d.o.o. Tolmin Verrouillage de sécurité pour une porte d'appareil ménager
WO2006095241A1 (fr) 2005-03-08 2006-09-14 Itw Metalflex, Druzba Za Proizvodnjo Delov Za Gospodinjske Aparate, D.O.O. Dispositif de blocage pour la porte d'un appareil menager electrique, en particulier la porte d'une machine a laver
WO2008044132A3 (fr) * 2006-10-13 2008-08-21 Itw Metalflex Druzba Za Proizv Dispositif de blocage destine a la porte d'un appareil electromenager electrique, en particulier la porte d'une machine a laver
WO2013151964A1 (fr) 2012-04-03 2013-10-10 Illinois Tool Works Inc. Dispositif de verrouillage de porte avec commutateur de détection de porte intégré

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110106668B (zh) * 2019-06-11 2021-06-15 温州天健电器有限公司 电动门锁通断电控制装置、门锁、洗衣机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702454A (en) * 1971-09-24 1972-11-07 Montec Corp Ambient compensated time delay switch
EP0682352A2 (fr) * 1994-05-12 1995-11-15 SAMUEL MONTAGU & CO. LIMITED (as Security Trustee of DIAMOND H CONTROLS LIMITED) Régulateur d'énergie

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702454A (en) * 1971-09-24 1972-11-07 Montec Corp Ambient compensated time delay switch
EP0682352A2 (fr) * 1994-05-12 1995-11-15 SAMUEL MONTAGU & CO. LIMITED (as Security Trustee of DIAMOND H CONTROLS LIMITED) Régulateur d'énergie

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1550759A2 (fr) * 2003-12-18 2005-07-06 ITW Metalflex d.o.o. Tolmin Dispositif de sécurité dans un appareil ménager
EP1550759A3 (fr) * 2003-12-18 2009-08-26 ITW Metalflex d.o.o. Tolmin Dispositif de sécurité dans un appareil ménager
EP1645706A2 (fr) * 2004-10-06 2006-04-12 ITW Metalflex d.o.o. Tolmin Verrouillage de sécurité pour une porte d'appareil ménager
EP1645706A3 (fr) * 2004-10-06 2008-04-02 ITW Metalflex d.o.o. Tolmin Verrouillage de sécurité pour une porte d'appareil ménager
WO2006095241A1 (fr) 2005-03-08 2006-09-14 Itw Metalflex, Druzba Za Proizvodnjo Delov Za Gospodinjske Aparate, D.O.O. Dispositif de blocage pour la porte d'un appareil menager electrique, en particulier la porte d'une machine a laver
WO2008044132A3 (fr) * 2006-10-13 2008-08-21 Itw Metalflex Druzba Za Proizv Dispositif de blocage destine a la porte d'un appareil electromenager electrique, en particulier la porte d'une machine a laver
WO2013151964A1 (fr) 2012-04-03 2013-10-10 Illinois Tool Works Inc. Dispositif de verrouillage de porte avec commutateur de détection de porte intégré

Also Published As

Publication number Publication date
EP1137030B1 (fr) 2003-02-19
DE60100104D1 (de) 2003-03-27
DE60100104T2 (de) 2004-01-29
SI20537A (sl) 2001-10-31
ES2192550T3 (es) 2003-10-16

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