EP1168390A1 - Interrupteur électrique auto-ouvrant - Google Patents

Interrupteur électrique auto-ouvrant Download PDF

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Publication number
EP1168390A1
EP1168390A1 EP00830459A EP00830459A EP1168390A1 EP 1168390 A1 EP1168390 A1 EP 1168390A1 EP 00830459 A EP00830459 A EP 00830459A EP 00830459 A EP00830459 A EP 00830459A EP 1168390 A1 EP1168390 A1 EP 1168390A1
Authority
EP
European Patent Office
Prior art keywords
switch
contacts
opening
control means
thrust 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.)
Withdrawn
Application number
EP00830459A
Other languages
German (de)
English (en)
Inventor
Antonio Coppola
Vincenzo Pascucci
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.)
Signal Lux Italia SpA
Original Assignee
Signal Lux Italia SpA
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 Signal Lux Italia SpA filed Critical Signal Lux Italia SpA
Priority to EP00830459A priority Critical patent/EP1168390A1/fr
Publication of EP1168390A1 publication Critical patent/EP1168390A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/50—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring
    • H01H3/503—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring making use of electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection

Definitions

  • the present invention relates to a self-opening electric switch of the type comprising a manually-actuated mechanism adapted to selectively dispose the electric contacts of the switch in a closed and open position and an electromagnetically-actuated device which is adapted, when in a powered condition, to keep the contacts in a closed position, provided the latter have been manually closed and, when in a condition of power absence, to automatically move said contacts to an open position.
  • a switch of the self-opening type avoids an undesired starting of the apparatus itself taking place when power comes back.
  • a self-opening switch avoids occurrence of an automatic restarting of the apparatus to which it is connected when the intervention conditions of the pressure switch or thermostat are no longer present.
  • the self-opening electric switches of known type comprise, in addition to a manually-actuated mechanism adapted to dispose the electric contacts in a closed or open position, an electromagnetically-actuated device adapted, when in a powered condition, to keep said contacts in a closed position, provided the latter have been previously manually closed, and to automatically move the same contacts to an open position, when in a condition of power absence.
  • the required electromagnet for keeping the contacts to the closed position takes up space and therefore causes a non-negligible bulkiness of the electric switch on the whole, making it difficult to insert it in particular types of appliances.
  • the technical task underlying the present invention is to devise a self-opening electric switch capable of substantially eliminating the above mentioned drawbacks.
  • Another important aim of the invention is to devise a self-opening switch of easy construction starting from structures of standard single-pole or double-pole switches with the addition of few components.
  • Switch 1 comprises a manually-actuated mechanism 2, of known type, adapted to selectively dispose the electric contacts 3 to an open position (see Figs. 1 and 3) and to a closed position (see Figs. 2 and 4).
  • the manually-actuated mechanism 2 comprises an oscillating key 4 rotatably in engagement, at a hinging pin 5, with a base body 6 with which fixed electrical terminals 7 are made integral.
  • the oscillating key 4 is capable by itself, as in any switch not of the self-opening type, to allow the necessary thrust to be reached so as to dispose the electric contacts that have been correctly pressed to a closed and/or open position.
  • Switch 1 further comprises an electromagnetically-actuated device 8 which, when in a powered condition, is intended to keep contacts 3 to a closed position, provided these contacts have been manually closed by the oscillating key 4 and, when in a condition of power absence, is intended to automatically bring said contacts to an open position.
  • an electromagnetically-actuated device 8 which, when in a powered condition, is intended to keep contacts 3 to a closed position, provided these contacts have been manually closed by the oscillating key 4 and, when in a condition of power absence, is intended to automatically bring said contacts to an open position.
  • the electromagnetically-actuated device 8 comprises control means 9 for switch opening adapted to exert on the manually-actuated mechanism 2 and more specifically on the oscillating key 4, a force capable of causing rotation of the oscillating key around the hinging pin 5 in a direction corresponding to opening of the contacts.
  • the electromagnetically-actuated device comprises hooking means 10 movable between a first position, corresponding to the open-contact position (see Figs. 1 and 3), in which said means does not interfere with the opening control means 9, and a second position corresponding to the closed-contact position, in which the operating efficiency of the control means 9 is inhibited (see Figs. 2 and 4).
  • This second position of the hooking means 10 is maintained by an electromagnet 11 in a powered condition.
  • the opening control means 9 comprises a pusher defined by a thrust pin 12, in working contact with the oscillating key 4 and a first spring element 13 defined by a cylindrical spiral pressure spring wound around the thrust pin itself.
  • the thrust pin 12 and spring 13 are slidably fitted in a through hole 14 formed in the base body 6; spring 13 is retained at a first end thereof by an end protuberance 12a of the thrust pin 12 and at a second end thereof by a portion 15 jutting out into the through hole 14. Practically, spring 13 is interposed between the thrust pin 12 and the base body 6 and causes a tendency of the former to push the oscillating key 4 towards a position corresponding to opening of the contacts.
  • the hooking means 10 comprises a locking element 16 movable transversely of the translation direction of the thrust pin 12 from said first position in which it interferes with the thrust pin and said second position in which it locks translation of the latter, thereby inhibiting the operating efficiency of the opening control means 9.
  • the locking element 16 consists of a bar hinged at one end thereof on an oscillation axis, not shown, parallel to the translation direction of the thrust pin 12, and insertable in a stop seating 12b of said pin defined by an annular recess disposed at an end 12c opposite to the end protuberance 12a.
  • the end 12c and annular recess 12b come out of the through hole 14 when the oscillating key 4 is in a position corresponding to closure of the contacts (see Figs. 2 and 4).
  • rotation of bar 16 around its oscillation axis is delimited by a recess 17 disposed at a plate-shaped portion 18 rigid with the base body 6.
  • the locking bar 16 is operatively connected with a lever control member 17 hinged on the base body 6 around a rotation axis 20 substantially parallel to the axial direction of the bar itself.
  • the lever control member 19 comprises a first arm 19a having an end 19b in engagement with the locking bar 16 and a second arm 19c intended to be attracted by the electromagnet 11.
  • a second spring element 21 is interposed between the base body 6a and the lever control member 19 and it consists of a pull or compression spring for example, which is adapted to keep the lever control member 19, and the locking bar 16 connected thereto, in said first position of non-interference with the thrust pin 12.
  • the thrust pin 12 is pressed, against the action of the first spring 13 which is thus compressed, by the oscillating key 4 itself that makes the end 12c and the stop seating 12b come out of the through hole 14.
  • the electromagnet 11 is powered and, by attracting the second arm 19c of the lever control member 19, it overcomes the force of the second spring 21 and causes rotation of said second arm, which will give rise to displacement of the locking bar 16 that is inserted into the stop seating 12b of the thrust pin 12. In this way the thrust pin 12 is locked and the first spring 13 is prevented from exerting its spring action tending to bring the oscillating key 4 back to the open position (see Figs. 2 and 4).
  • the second spring 21 brings the lever control member 19 and the locking bar 16 back to the position of non-interference with the thrust pin 12 that therefore, being free to slide in the through hole 14, follows displacement of the oscillating key 4 against which it is pressed by the first spring 13.
  • the electromagnet 11 If a mains voltage failure occurs or if for any other reason the electromagnet 11 is no longer power-supplied, for example due to the fact that this electromagnet is also connected to a circuit in which passage of current is linked to a physical parameter such as a pressure, temperature or time parameter, the locking bar 16, which is no longer retained in the stop seating 12b by the electromagnet force, moves and releases the thrust pin 12 that, under the action of the first spring 13, exerts pressure against the oscillating key 4 bringing it back to the open position.
  • a physical parameter such as a pressure, temperature or time parameter
  • the switch contacts will at all events remain in an open position, and they will be able to go back to the closed position only by a new manual intervention on the oscillating key 4.
  • the invention achieves important advantages.
  • the electromagnet of the switch of the invention can therefore be of smaller bulkiness and lower cost as compared with the switches of the known art.
  • the concerned self-opening switch is practically made up of a standard single-pole or double-pole switch to which the above disclosed electromagnetically-actuated device is added.
  • the self-opening switch made in accordance with the invention can merely constitute a modified construction version of the already planned and tested devices.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
EP00830459A 2000-06-30 2000-06-30 Interrupteur électrique auto-ouvrant Withdrawn EP1168390A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00830459A EP1168390A1 (fr) 2000-06-30 2000-06-30 Interrupteur électrique auto-ouvrant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00830459A EP1168390A1 (fr) 2000-06-30 2000-06-30 Interrupteur électrique auto-ouvrant

Publications (1)

Publication Number Publication Date
EP1168390A1 true EP1168390A1 (fr) 2002-01-02

Family

ID=8175389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00830459A Withdrawn EP1168390A1 (fr) 2000-06-30 2000-06-30 Interrupteur électrique auto-ouvrant

Country Status (1)

Country Link
EP (1) EP1168390A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7722444B2 (en) 2005-05-13 2010-05-25 Black & Decker Inc. Angle grinder
CN104576207A (zh) * 2014-12-19 2015-04-29 宁波保税区明德工业设计有限公司 一种开关控制装置
US10354822B2 (en) 2013-10-22 2019-07-16 Marquardt Verwaltungs-Gmbh Electrical switch, in particular a switch for an electrical power tool
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2342184A1 (fr) * 1976-02-26 1977-09-23 Seima Commutateur pour indicateur de changement de direction de vehicule
EP0591679A1 (fr) * 1992-10-08 1994-04-13 Schulte-Elektrotechnik GmbH & Co. KG Commutateur électrique avec contrôle de courant

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2342184A1 (fr) * 1976-02-26 1977-09-23 Seima Commutateur pour indicateur de changement de direction de vehicule
EP0591679A1 (fr) * 1992-10-08 1994-04-13 Schulte-Elektrotechnik GmbH & Co. KG Commutateur électrique avec contrôle de courant

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7722444B2 (en) 2005-05-13 2010-05-25 Black & Decker Inc. Angle grinder
US8087976B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Trigger assembly for angle grinder
US8087977B2 (en) 2005-05-13 2012-01-03 Black & Decker Inc. Angle grinder
US10354822B2 (en) 2013-10-22 2019-07-16 Marquardt Verwaltungs-Gmbh Electrical switch, in particular a switch for an electrical power tool
CN104576207A (zh) * 2014-12-19 2015-04-29 宁波保税区明德工业设计有限公司 一种开关控制装置
CN104576207B (zh) * 2014-12-19 2017-08-18 宁波保税区明德工业设计有限公司 一种开关控制装置
US10818450B2 (en) 2017-06-14 2020-10-27 Black & Decker Inc. Paddle switch

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