EP0163586A2 - Piezoelektrische Zündvorrichtung - Google Patents

Piezoelektrische Zündvorrichtung Download PDF

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Publication number
EP0163586A2
EP0163586A2 EP85420078A EP85420078A EP0163586A2 EP 0163586 A2 EP0163586 A2 EP 0163586A2 EP 85420078 A EP85420078 A EP 85420078A EP 85420078 A EP85420078 A EP 85420078A EP 0163586 A2 EP0163586 A2 EP 0163586A2
Authority
EP
European Patent Office
Prior art keywords
sheath
sleeve
anvil
stopper
piezoelectric element
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Withdrawn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
EP85420078A
Other languages
English (en)
French (fr)
Other versions
EP0163586A3 (de
Inventor
Ichikawa Masaharu
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.)
Intermatch SA
KK Piem Riken
PIEM RIKEN KK
Original Assignee
Intermatch SA
KK Piem Riken
PIEM RIKEN KK
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 Intermatch SA, KK Piem Riken, PIEM RIKEN KK filed Critical Intermatch SA
Publication of EP0163586A2 publication Critical patent/EP0163586A2/de
Publication of EP0163586A3 publication Critical patent/EP0163586A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/002—Igniters using electrically-produced sparks using piezoelectric elements

Definitions

  • the present invention relates to a piezoelectric ignition device, in particular, although not exclusively, for a gas lighter.
  • the piezoelectric ignition devices generally comprise a tubular sheath mounted axially movable between two extreme positions, respectively extended and retracted, in a tubular body closed by a bottom, at one of its ends, this tubular sheath containing, starting from its outer end, an anvil made of electrically conductive material, a piezoelectric element and a cylindrical element forming a stopper, also made of an electrically conductive material, these three members being axially connected to the sheath by being pressed axially, one against the other, a striker associated with spring means being provided to strike against the stopper at the end of the re-entering stroke of the sleeve, the first part of which is used to band the associated spring means to the striker while other spring means normally tend to return and maintain the sheath in its extreme out position.
  • the axial immobilization of the metal cylinder is generally obtained by an internal shoulder of the bore of the sheath while those of the piezoelectric element and the anvil are generally obtained using an adhesive resin.
  • the layer formed by the adhesive resin has the advantage of constituting a good insulator between the two poles of the piezoelectric element, but it also has the drawback of being long and difficult to install, of being fragile, to break easily and, by its rigidity, to limit the deformations of the piezoelectric element which has the effect of weakening the electric power of the piezoelectric element until rendering the igniter unusable.
  • the present invention aims to remedy all these drawbacks.
  • the internal transverse dimensions of the sheath are slightly smaller than the transverse dimensions of the stopper, the piezoelectric element and the anvil, so that their axial fixation in the sheath is ensured by simple wedging or radial stress, used to generate their axial pressurization.
  • the sheath is made of an elastically deformable material improving the radial stressing of the three members.
  • a material which is perfectly suitable for making up the sheath is a polyamide or a polyacetaJ.
  • the anvil carries at least one radial notch and, on the other hand, the sheath has a lateral window capable of receiving and retaining the notch of the anvil after axial tensioning of the sheath.
  • this device essentially comprises a tubular body (2) closed, at one of its ends, by a bottom (2a) and in which is mounted a tubular sheath (3) axially movable between two extreme positions, exit and return respectively.
  • the figure of the drawing shows the body (2) and the sleeve (3) in the extended position of the sleeve (3) relative to the body (2). It is further specified that the axial movement of the sheath (3) relative to the body (2) is relative, that is to say that it can result either from a displacement of the sheath (3), or from a displacement of the body (2).
  • anvil (4) Inside the sheath (3) are housed, starting from the outer end of the latter, an anvil (4) of metal or other electrically conductive material, a piezoelectric element (5) and a stopper (6) also made of metal or other electrically conductive material.
  • the anvil (4) carries, at its end corresponding to the external end of the sheath (3), a radial tab (7) constituting one of the electrodes of this ignition device.
  • an axially movable striker (8) Inside the inner end of the sheath (3) and of the body (2), is also housed an axially movable striker (8), with which is associated a helical spring (9) compressed between it and the bottom (2a ) of the body (2).
  • this device results from the increase in the mutual engagement of the sheath (3) and of the body (2) against the springs (9) and (11), which are compressed by this increase in engagement means, not described here, having the effect of allowing the striker (8) to be driven by the sheath (3) to the vicinity of its re-entrant end of travel and its release when the sheath (3) reaches its end of travel re-entrant, so that the rebound of the spring (9) projects the striker (8) against the stopper (6).
  • These means are described in detail in European patent application No. 84420149.1 in the name of the Applicant.
  • the object of the present application relates to the axial fixing of the anvil (4), of the piezoelectric element (5) and of the stopper (6) in the sheath (3), it being recalled that this axial position must allow axial pressurization of these three elements, that is to say generate between them an axial stress.
  • the external transverse dimensions of the anvil (4), of the piezoelectric element (5) and the stopper (6) are slightly greater than those of each bore of the sleeve (3), respectively (3a) and (3b), provided to receive them. It follows that the engagement of these three organs (4,5,6) in the sleeve (3) generates, on each of them, a radial stress intended to ensure its axial fixing and also making it possible to generate between them the axial stress necessary for the operation of this device.
  • the axial immobilization of the stopper (6) in the direction of the arrow (12) is advantageously obtained by a shoulder (13) provided inside the bore (3b) of the sleeve ( 3) and cooperating with a shoulder (6a) of the stopper (6).
  • the conditions of axial stressing of the members (4,5,6) are improved by the use, for the production of the sheath (3), of a deformable elastic material such as, for example, a polyamide or a polyacetal.
  • a piezoelectric ignition device of simple constitution is thus obtained, easy to manufacture, since it is no longer necessary to inject an adhesive with all the drawbacks associated with this injection and which, moreover, has the advantage to allow regular and unsurprising manufacturing and, therefore, to obtain a reliable device and safe operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Lighters Containing Fuel (AREA)
  • Measuring Fluid Pressure (AREA)
EP85420078A 1984-05-28 1985-04-29 Piezoelektrische Zündvorrichtung Withdrawn EP0163586A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1984077093U JPS60190056U (ja) 1984-05-28 1984-05-28 圧電点火器に於ける圧電素子取付装置
JP77093/84U 1984-05-28

Publications (2)

Publication Number Publication Date
EP0163586A2 true EP0163586A2 (de) 1985-12-04
EP0163586A3 EP0163586A3 (de) 1986-12-17

Family

ID=13624164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85420078A Withdrawn EP0163586A3 (de) 1984-05-28 1985-04-29 Piezoelektrische Zündvorrichtung

Country Status (5)

Country Link
EP (1) EP0163586A3 (de)
JP (1) JPS60190056U (de)
AU (1) AU4301585A (de)
DK (1) DK203885A (de)
PT (1) PT80442B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650654A1 (fr) * 1989-08-02 1991-02-08 Laforest Sa Mecanisme piezo-electrique pour briquets a gaz

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2674004B1 (fr) * 1991-03-13 1995-12-08 Laforest Bic Sa Mecanisme piezo-electrique pour briquets a gaz.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1182762A (en) * 1968-02-16 1970-03-04 Brush Clevite Company Ltd Piezoelectric Unit
GB1302025A (de) * 1969-01-10 1973-01-04
GB1319101A (en) * 1970-06-05 1973-06-06 Vernitron Ltd Piezoelectric units and igniter devices
US3771943A (en) * 1971-03-23 1973-11-13 Ranson Corp Lighter
FR2270526B1 (de) * 1974-05-09 1978-06-02 Rv Const Electriques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650654A1 (fr) * 1989-08-02 1991-02-08 Laforest Sa Mecanisme piezo-electrique pour briquets a gaz

Also Published As

Publication number Publication date
JPS60190056U (ja) 1985-12-16
DK203885D0 (da) 1985-05-08
AU4301585A (en) 1985-12-05
EP0163586A3 (de) 1986-12-17
PT80442A (fr) 1985-06-01
DK203885A (da) 1985-11-29
PT80442B (fr) 1986-10-28

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Inventor name: MASAHARU, ICHIKAWA