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EP3564978A1 - Commutateur d'allumage - Google Patents

Commutateur d'allumage Download PDF

Info

Publication number
EP3564978A1
EP3564978A1 EP18170620.1A EP18170620A EP3564978A1 EP 3564978 A1 EP3564978 A1 EP 3564978A1 EP 18170620 A EP18170620 A EP 18170620A EP 3564978 A1 EP3564978 A1 EP 3564978A1
Authority
EP
European Patent Office
Prior art keywords
ignition switch
wall portion
housing
contact
flexible wall
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Withdrawn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
EP18170620.1A
Other languages
German (de)
English (en)
Inventor
Mauro ANGELINI
Emanuele Sorrentino
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.)
Electrolux Appliances AB
Original Assignee
Electrolux Appliances AB
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 Electrolux Appliances AB filed Critical Electrolux Appliances AB
Priority to EP18170620.1A priority Critical patent/EP3564978A1/fr
Priority to PCT/EP2019/060397 priority patent/WO2019211126A1/fr
Publication of EP3564978A1 publication Critical patent/EP3564978A1/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Withdrawn legal-status Critical Current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
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H01H3/141—Cushion or mat switches
    • H01H3/142—Cushion or mat switches of the elongated strip type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings

Definitions

  • the present invention relates generally to the field of electric switches. More specifically, the present invention relates to an ignition switch for gas appliances.
  • Gas appliances comprising one or more ignition switches in order to provide a spark at a gas burner for igniting said gas burner are basically known.
  • the ignition switch may be operatively coupled with a knob of a gas tap in order to generate an ignition spark when pressing the knob. More in detail, the ignition switch allows to close an electrical circuit in which a spark generator is provided.
  • German patent DE 1 429 108 C3 discloses an ignition arrangement comprising mechanical transfer elements.
  • German patent application DE 196 10 522 A1 discloses an ignition switching mechanism comprising a switching element which is operatively coupled with a plurality of shafts of gas taps.
  • the invention relates to an ignition switch for a gas appliance.
  • the ignition switch comprises a housing and a first and a second contact portion included in an interior space of said housing.
  • Said housing comprises a flexible wall portion which at least partially confines said interior space of said housing.
  • At least one contact portion is operatively coupled with said flexible wall portion such that an electrical contact is achieved between the first and the second contact portion when deforming the flexible wall portion.
  • the flexible wall portion may be formed by a reversibly elastically deformable material.
  • Said ignition switch is advantageous because due to the flexible wall portion of the housing, the switching operation can be obtained by a deformation of the flexible wall portion. Thereby, the spillage resistance and the fields of application of the ignition switch are greatly increased.
  • the housing comprises a further wall portion, wherein said first and second contact portions are encapsulated between said flexible wall portion and said further wall portion.
  • the flexible wall portion and the further wall portion are connected in a fluid-tight manner, e.g. by gluing, moulding or similar connection methods.
  • the flexible wall portion and the further wall portion are connected without providing a gasket between said wall portions.
  • said flexible wall portion forms an upper portion of said housing.
  • said flexible wall portion comprises a U-like or essentially U-like shape.
  • the legs of the U-like shaped flexible wall portion can be bent outwardly thereby enabling a physical contact between the contact portions.
  • a contact portion is arranged at the flexible wall portion and the other contact portion is arranged at the further wall portion. Thereby, when deforming the flexible wall portion, the contact portions come closer to each other and get in physical contact.
  • one contact portion of said first and second contact portions comprises a planar contact pad.
  • Said planar contact portion may be provided at the flexible wall portion, specifically at the bottom portion of the U-like shaped flexible wall portion.
  • the planar contact pad may be provided at the further wall portion arranged opposite to the flexible wall portion.
  • one contact portion of said first and second contact portions comprises a convexly shaped contact section, wherein the curvature of the convexly shaped contact section is provided towards the other contact portion.
  • the ignition switch comprises an elongated and/or bar-like shape.
  • the ignition switch may extend along multiple gas taps which are arranged in a row and the pressing of one knob of said gas taps ensures a switching operation of the ignition switch.
  • the first and second contact portions are integrally formed and extend along the elongated and/or bar-like housing, specifically, along the whole or essentially the whole length of the interior space of the elongated and/or bar-like housing.
  • the ignition switch may comprise a single switch, specifically a micro-switch, and a switching operation caused by one gas tap corresponding with the ignition switch causes the same switching operation than a switching operation caused by another gas tap corresponding with the ignition switch.
  • the housing comprises two parallel branches which are distanced in a middle portion of the ignition switch by means of a gap in order to provide a passage for one or more gas tap shafts.
  • the one or more gas tap shafts can extend through the ignition switch and the reliability of ignition switch is further increased because switching means are provided at opposite sides of the gas tap shaft.
  • first and second contact portions are provided in both branches or only in one branch.
  • a pair of contact portions can be provided only at one side of the gas tap shaft or the contact portions are duplicated at both sides of the gas tap shaft.
  • the flexible wall portion is integrally formed and extends over both branches. Thereby, the spillage resistance of the ignition switch is further improved.
  • the further wall portion is integrally formed and extends over both branches. Thereby, the spillage resistance of the ignition switch is further improved.
  • the invention relates to a gas appliance comprising one or more gas taps and an ignition switch for igniting one or more gas burners, the ignition switch being configured according to any embodiment described before.
  • the gas appliance comprises multiple gas taps, wherein the ignition switch extends along said multiple gas taps, specifically along all gas taps of the appliance.
  • the ignition switch extends along said multiple gas taps, specifically along all gas taps of the appliance.
  • the ignition switch is placed below one or more knobs of said one or more gas taps such that the flexible wall portion of the ignition switch is deformed when pressing at least one knob.
  • switching operation is obtained by a direct impact of the knob on the flexible wall portion.
  • the switching operation can also be obtained by an indirect impact of the knob, e.g. by a transfer entity provided between the knob and the ignition switch.
  • Fig. 1 illustrates a schematic diagram of an arrangement of an ignition switch 1 and multiple gas taps 6 which interact with said ignition switch 1 for igniting gas burners (not shown in fig. 1 ) which are coupled with said gas taps 6.
  • the ignition switch 1 is adapted to be arranged below a knob 6.2 of the gas tap 6, said knob 6.2 being coupled with a valve portion of gas tap 6 via a gas tap shaft 6.1.
  • the arrangement of the ignition switch 1 with respect to the knob 6.2 is chosen such that, when pressing the knob 6.2, a lower surface of the knob 6.2 abuts against an upper portion of the ignition switch 1. Thereby, at least a portion of the ignition switch 1 is deformed causing a closure of an electrical contact within the ignition switch 1. Said closing of electrical contact causes an ignition spark at one or more gas burners.
  • the ignition switch 1 may span along multiple gas taps 6. More in detail, a single ignition switch 1 may comprise a longitudinal shape and may extend across multiple gas taps 6 such that multiple knobs 6.2 of gas taps 6 can interact with the ignition switch 1 as mentioned before.
  • Fig. 2 shows a partial cross-sectional view of an arrangement of a knob 6.2 and an ignition switch 1.
  • the ignition switch 1 comprises a housing 2. At least a portion of said housing 2 is made of a flexible material. So, in other words, the housing 2 comprises a flexible wall portion 2a made of a flexible, deformable material. Said material may be silicone, rubber, flexible plastic or a flexible, insulating composite or mixed material. In the shown embodiment, the flexible wall portion 2a forms the upper portion of the housing 2 which gets in contact with the knob 6.2. The flexible wall portion 2a may comprise a U-like shape which opens downwardly.
  • the housing 2 may further comprise a further wall portion 2b made of a rigid material. Said further wall portion 2b may form the lower portion of the housing 2, specifically a portion which is arranged below the flexible wall portion 2a.
  • the flexible wall portion 2a and the further wall portion 2b may confine an interior space 2.1 within said housing 2.
  • electrical switching means including at least a first contact portion 3 and a second contact portion 4 are provided.
  • the flexible wall portion 2a and the further wall portion 2b may be glued, molded or otherwise firmly bonded in order to achieve a hermetically sealing of electrical switching means included within the housing 2.
  • the flexible wall portion 2a and the further wall portion 2b may be connected such that a fluid-tight encapsulation of the first contact portion 3 and the second contact portion 4 is achieved. Said fluid-tight encapsulation is preferably obtained without any gaskets provided between the flexible wall portion 2a and the further wall portion 2b.
  • the first contact portion 3 is provided at the flexible wall portion 2a and the second contact portion 4 is provided at the further wall portion 2b.
  • the distance d between the first and second contact portion 3, 4 can be changed when pressing the knob 6.2 and the first and second contact portion 3, 4 can get in contact with each other (which results in a closed electrical contact).
  • the first and second contact portion 3, 4 may comprise different shapes.
  • one of the contact portions for example the first contact portion 3 which is provided at the flexible wall portion 2a, may comprise a planar shape, whereas the other contact portion, for example, the second contact portion 4, may comprise a convex shape.
  • the other contact portion may comprise an upwardly oriented curvature in order to improve the electrical contact when pressing the knob 6.2.
  • the contact portions 3, 4 may comprise a longitudinal shape and may extend along the longitudinal axis within the housing 2. So, in other words, the contact portions 3, 4 may be integrally formed and may extend along the whole or essentially along the whole length of the interior space 2.1 of the housing 2.
  • Fig. 3 and 4 illustrate a cross section of an ignition switch 1 in a non-deformed and a deformed state.
  • the flexible wall portion 2a is deformed and the contact portions are pressed against each other. Thereby a closed electrical contact is achieved which cause the generation of a spark by a spark generator.
  • the ignition switch 1 In case of removing the external forces, the ignition switch 1 returns into the position shown in Fig. 3 , i.e. the electrical contact is opened.
  • the restoring force may be applied solely by the flexible material of the flexible wall portion 2a, i.e. no spring element is required for opening the electrical contact.
  • the ignition switch 1 may be adapted such that one or more gas tap shafts 6.1 can be provided though the ignition switch 1. More in detail, the ignition switch 1 may comprise a first branch 2' and a second branch 2". Said branches 2', 2" may be arranged parallel or essentially parallel. Said branches 2', 2" are at least partially separated from each other such that one or more gas tap shafts 6.1 can be provided through one or more gaps 5. Said one or more gaps 5 may be arranged between said branches 2', 2".
  • the branches 2', 2" may be coupled by one or more bars 2.2.
  • the bars 2.2 may be arranged at or close to the free ends of the housing 2 of the ignition switch 1. Therefore, in the present case, the gap 5 essentially extends along the whole length of the ignition switch 1.
  • the bars 2.2 could also be provided at other positions, specifically only bridging the branches 2', 2" at the further wall portion 2b.
  • Fig. 5 shows the components of the ignition switch 1 in closer detail.
  • the flexible wall portion 2a and the further wall portion 2b may comprise a rectangular ring-like shape and may be adapted to form an interior space 2.1 which also comprises a rectangular ring-like shape.
  • Each contact portion 3, 4 may comprise two legs 3.1, 4.1 being arranged parallel to each other. One leg 3.1, 4.1 is provided in the first branch 2' and the further leg 3.1, 4.1 may be provided in the second branch 2".
  • the contact portions 3, 4 may be coupled at least at one free end of said legs 3.1, 4.1 based on a coupling portion in order to enable a common electrical contact of the legs 3.1, 4.1. Electrical wires may be provided through a passage in the housing 2 in order to enable an electrical coupling of the contact portions 3, 4.
  • Fig. 6 shows a gas appliance 10 including multiple gas taps 6 and an ignition switch 1 according to Fig. 5 .
  • the gas tap shafts 6.1 are provided through a gap 5 of the ignition switch 1 and the knobs 6 are provided above the flexible wall portion 2a of the ignition switch 1.
  • the lower portion of the housing 2 may rest on a fixed portion of the gas appliance housing or a housing of the gas taps 6. Thereby, when pressing one of the knobs 6.2, the flexible wall portion 2a of the housing 2 is deformed and the contact portions 3, 4 get in contact with each other.
  • the ignition switch 1 does not comprise a gap 5 between a pair of branches 2', 2" but comprises a bar-like shape without any opening for passage of gas tap shafts 6.1.
  • Such ignition switch 1 may be arranged below the one or more knobs 6.2 of the gas taps 6 in front of (similar to branch 2' in Fig. 6 ) or behind (similar to branch 2" in Fig. 6 ) the set of gas tap shafts 6.1.
  • Fig. 7 shows a further example embodiment of an ignition switch 1.
  • the housing 2 is formed by flexible material which circumferentially encompasses the first and second contact portion 3, 4. So in other words, not only a portion, specifically an upper portion of the housing 2 is made of a flexible material but also a lower portion.
  • the housing 2 may be partly inserted in a holder structure 8.
  • Said holder structure 8 may be, for example, made of a rigid material or a material with greater shore hardness than the flexible material of the housing 2.
  • the holder structure 8 may have a U-shape in order to receive and partly encompass the housing 2.
  • the housing 2 may be received with a lower portion in said holder structure 8.
  • the housing 2 may be clamped, form-fitted or otherwise fixed within the holder structure 8.
  • the housing 2 is fixed within the gas appliance, specifically fixed with respect to the knob 6.2 interacting with the ignition switch 1 in which said housing 2 is included.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
EP18170620.1A 2018-05-03 2018-05-03 Commutateur d'allumage Withdrawn EP3564978A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18170620.1A EP3564978A1 (fr) 2018-05-03 2018-05-03 Commutateur d'allumage
PCT/EP2019/060397 WO2019211126A1 (fr) 2018-05-03 2019-04-23 Commutateur d'allumage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18170620.1A EP3564978A1 (fr) 2018-05-03 2018-05-03 Commutateur d'allumage

Publications (1)

Publication Number Publication Date
EP3564978A1 true EP3564978A1 (fr) 2019-11-06

Family

ID=62116265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18170620.1A Withdrawn EP3564978A1 (fr) 2018-05-03 2018-05-03 Commutateur d'allumage

Country Status (2)

Country Link
EP (1) EP3564978A1 (fr)
WO (1) WO2019211126A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1429108A1 (de) 1963-02-06 1968-11-28 Imp Werke Gmbh Hochspannungszuendeinrichtung fuer Gasherde
EP0767475A2 (fr) * 1995-10-05 1997-04-09 Bridgestone Corporation Contact câble
DE19610522A1 (de) 1996-03-18 1997-09-25 Haschkamp Joachim Zündschaltvorrichtung für Gasherde
US20020178574A1 (en) * 2001-04-17 2002-12-05 Burgess Lester E. Pressure actuated switching device and transfer method for making same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1429108A1 (de) 1963-02-06 1968-11-28 Imp Werke Gmbh Hochspannungszuendeinrichtung fuer Gasherde
EP0767475A2 (fr) * 1995-10-05 1997-04-09 Bridgestone Corporation Contact câble
DE19610522A1 (de) 1996-03-18 1997-09-25 Haschkamp Joachim Zündschaltvorrichtung für Gasherde
US20020178574A1 (en) * 2001-04-17 2002-12-05 Burgess Lester E. Pressure actuated switching device and transfer method for making same

Also Published As

Publication number Publication date
WO2019211126A1 (fr) 2019-11-07

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