EP0172973B1 - Mechanismus für piezoelektrischer Zündeinrichtung - Google Patents

Mechanismus für piezoelektrischer Zündeinrichtung Download PDF

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Publication number
EP0172973B1
EP0172973B1 EP84420149A EP84420149A EP0172973B1 EP 0172973 B1 EP0172973 B1 EP 0172973B1 EP 84420149 A EP84420149 A EP 84420149A EP 84420149 A EP84420149 A EP 84420149A EP 0172973 B1 EP0172973 B1 EP 0172973B1
Authority
EP
European Patent Office
Prior art keywords
female body
sleeve
striker
ramp
sheath
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
Application number
EP84420149A
Other languages
English (en)
French (fr)
Other versions
EP0172973A1 (de
Inventor
Taiji Ohnishi
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.)
Swedish Match SA
Original Assignee
Swedish Match Consumer Products SA
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
Priority to US06/645,603 priority Critical patent/US4608508A/en
Application filed by Swedish Match Consumer Products SA filed Critical Swedish Match Consumer Products SA
Priority to DE8484420149T priority patent/DE3470210D1/de
Priority to EP84420149A priority patent/EP0172973B1/de
Priority to AT84420149T priority patent/ATE33302T1/de
Priority to ZA846976A priority patent/ZA846976B/xx
Priority to AU32796/84A priority patent/AU565394B2/en
Priority to CA000463011A priority patent/CA1224840A/fr
Publication of EP0172973A1 publication Critical patent/EP0172973A1/de
Application granted granted Critical
Publication of EP0172973B1 publication Critical patent/EP0172973B1/de
Expired 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 mechanism, in particular for a gas lighter, of the type comprising a female body of cylindrical bore in which is engaged a sheath of complementary external section containing, in order, from its outer end, a metal anvil serving as an electrode, a piezoelectric element and a metal stopper, while between the bottom of the female body and the inner end of the sheath are arranged two concentric helical springs, one outside of return of the sheath and bearing against the internal end of the latter, and the other detent interior bearing on a striker provided with two diametrically opposite lugs, each of which is engaged, on the one hand, in a window made in the adjacent wall of the female body, and, on the other hand, in a longitudinal guide slot formed in the sheath, opening at its internal end and each of which has a notch, one of which edge constitutes a notch for the attachment of the corresponding lug in which it is normally pushed by the action of a ramp formed in the transverse edge
  • FR-A-2 072 425 shows a mechanism of this type in which the cross section of the cylindrical bore of the female body and of the external perimeter of the sheath is circular, which implies mounting of the pins after engagement of the striker in the sheath and in the female body, with the beginning of compression of the helical springs for returning the sheath and for relaxing the striker.
  • the pins are constituted by a pin engaged in a hole provided, for this purpose, radially in the striker, which considerably increases the cost price of the striker and that of the mounting of the mechanism.
  • the present invention aims to remedy these drawbacks.
  • the cross section of the bore of the female body and that of the sleeve have a non-circular perimeter, so as to have a larger dimension in a direction which does not pass through the windows of the female body than in the other directions, and, on the other hand, the distance separating the free ends of the diametrically opposite lugs of the striker is less than the greatest aforementioned dimension of the cross section of the female body and sheath but greater than the distance separating the two windows from the female body.
  • the pins can be obtained directly from molding with the striker which can be engaged in the female body, after the two helical springs, with its pins oriented in the direction of the largest dimension of the bore of the female body and be pivoted in a direction perpendicular to the planes of the windows, when the pins are at the level of the windows.
  • the engagement of the striker in the female body can be carried out quite simply by pushing it with the interior end of the sheath, so that after the pivoting of the striker at the level of the windows, the longitudinal slots of the sheath can engage on the pins of the striker and thus achieve the locking of the mechanism as a result of the engagement, immediately after, of each pin in the notch of the associated slot.
  • the cross section of the bore of the female body and that complementary to the sheath have the shape of a double warhead.
  • the inner end of the latter has, on its edge and in the vicinity outlet of each longitudinal slot, on the side of the large dimension of its cross section, a ramp oriented so that, being applied against the corresponding lug, it tends to rotate the striker in the desired direction.
  • this mechanism essentially comprises a female body (2) inside which a cylindrical sheath (3) is slidably mounted, the outer end of the female body (2) being closed by an anvil (4) comprising one (5) of the ignition mechanism electrodes.
  • a piezoelectric element (6) and a metal stopper (7) Inside this sheath are housed and fixed a piezoelectric element (6) and a metal stopper (7) whose retention and fixing in the sheaths (3) are ensured by a flange (8).
  • the outer perimeter of the female body (2) is square while the inner bore of the sleeve (3) is of circular section.
  • the internal extension (3a) of the sleeve (3) that is to say its extension beyond the stopper (7), has two slots (9) diametrically opposite and intended to serve as a guide for two pins (11) diametrically opposite of a striker (12) having the shape of a cylinder of circular section capable of sliding in the bore of the same section of the sleeve (3).
  • each longitudinal slot (9) of the sleeve (3) opens at the inner end of this sleeve (3) and has, in the vicinity of this end, a lateral notch (13) whose side (13a), closest to the free interior end of the sheath (3), serves as a retaining element for the striker (12), while its opposite side (13b) serves as a catch notch in the armed position of this striker (12), these two sides (13a) and (13b) of each notch (13) acting on one of the lugs (11) of the striker (12).
  • the female body (2) has, on each of two of its opposite walls corresponding to the wall parts of the sheath (3) comprising the longitudinal slots (9), a window (14) through which one of the pins (11) of the striker (12).
  • Each window (14) is wide enough to cover the corresponding longitudinal slot (9) and its lateral notch (13) so as not to hinder the movements of the pins (11) during the rotation of the striker (12) necessary for the operation of the mechanism.
  • the female body (2) contains two concentric helical springs (15) and (16) bearing on its bottom wall (2a) by one of their ends and respectively, against the striker (12) and against the inner end of the extension (3a) of the sheath (3).
  • the inner spring (15) constitutes the striker spring (12) while the outer spring (16) constitutes the return spring of the mechanism in the rest position.
  • each window (14) is inclined relative to the longitudinal axis of the mechanism so as to each constitute a ramp, respectively, for engagement (14) and for triggering (14b), these two ramps being inclined in the same direction in order to produce opposite effects.
  • the actuation of the mechanism consists in increasing the engagement of the sheath (3) in the female body (2) by displacement of one, of the other, or of these elements.
  • each lug (11) of the striker (12) bears against the bottom of the engagement ramp (14a) of the corresponding window (14).
  • This displacement has the effect of driving the lugs (11) out of the notches (13) and of bringing them into the longitudinal slots (9) with the elimination of any retention against the action of the detent spring (15) which has the effect of project the striker (12) against the stopper (7) thereby causing the spark due to the desired piezoelectric phenomenon.
  • each lug (11) of the striker (12) moves away from the ramp ( 14b) corresponding and comes into abutment against the latching ramp (14a) of the same window (14), which causes the immobilization of the striker (12) relative to the sheath (3) until the notches ( 13) appear to the right of the lugs (11).
  • the reaction of the ramps (14a) on the pins (11) tends to move them in the direction of the arrow (18), causing them to engage in the notches (13) with corresponding rotation of the striker (12).
  • the mechanism is then ready for a new actuation.
  • the object of the present invention is to allow the lugs (11) to be obtained directly in the manufacture of the striker (12) by molding or forging, so as to allow a considerable simplification of the assembly operations of the mechanism while reducing the cost of manufacture of its striker (12).
  • the common section of the internal bore of the female body (2) and the external face of the sleeve (3) has the shape of a double warhead giving it a corresponding transverse dimension to one of the diagonals of the square section of the female body (2) called large diameter (D) greater than all the other transverse dimensions.
  • the distance (L) separating the free ends of the pins (11) of the striker (12) is, on the one hand, less than the aforementioned large diameter (D) and, on the other hand, greater than the distance separating the internal faces of the walls of the female body (2) in which the windows (14) are formed.
  • the striker (12) can be engaged in the female body (2), after the springs (15) and (16), with its lugs (11) in alignment with the large diameter (D) as illustrated in FIG. 6, then, be pivoted by approximately 90 ° in the direction of the arrow (19) when the pins (11) are at the level of the windows (14). This engagement is done naturally by pushing the striker (12), and more precisely its lugs (11 using the sheath (3).
  • the inner end of the extension (3a) of the sheath (3) has, on each part of its edge located in the vicinity of the outlet of each longitudinal slot (9) and on the side of this slot not having the notch (13), a ramp (21) inclined in the direction of the longitudinal slot (9) considered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lock And Its Accessories (AREA)

Claims (3)

1. Piezoelektrischer Zündmechanismus mit einem Mutterkörper (2) mit einer zylindrischen Bohrung, in die eine Hülse (3) mit einem zum Querschnitt der Bohrung komplementären Aussenquerschnitt eingreift, welche, in der Reihenfolge von ihrem äusseren Ende aus betrachtet, einen als Elektrode dienenden metallischen Amboss (4), ein piezoelektrisches Element (6) und einen metallischen Puffer (7) enthält, wobei zwischen dem Boden (2a) des Mutterkörpers (2) und dem inneren Endbereich (3a) der Hülse (3) zwei konzentrische Schraubenfedern angeordnet sind, von denen die äussere (16) sich gegen den inneren Endbereich (3a) der Hülse (3) abstützt und die Rückholfeder der Hülse (3) bildet, während die innere Feder (15) als Auslösefeder dient und sich gegen einen Schlagbolzen (12) mit zwei diametral entgegengesetzten Nocken (11) abstützt, die jeweils einerseits mit einem in der Wandung des Mutterkörpers (2) angebrachten Fenster (14) und andererseits mit einem an der Hülse (3) vorgesehenen und in deren innerem Endbereich (3a) mündenden Längsführungsschlitz (9) in Eingriff stehen, wobei jeder dieser Längsführungsschlitze eine Kerbe (13) besitzt, die mit einem Rand (13b) eine Raste für das Verhaken der zugeordneten Nocke (11) bildet, in die diese normalerweise unter der Einwirkung einer Rampe (14a) hineingedrückt wird, die in dem von dem Boden (2a) des Mutterkörpers (2) am weitesten entfernten transversalen Rand des Fensters (14) angebracht ist und gegen die die Nocke (11) normalerweise von der Auslösefeder (15) gespannt wird, und von der sie durch eine an dem entgegengesetzten transversalen Rand des genannten Fensters (14) ausgebildeten Rampe (14a) abgeworfen wird, die in derselben Richtung geneigt ist wie die erstgenannte Rampe jedoch in entgegengesetzter Richtung wirkt und die an der die Nocke zur Anlage kommt, wenn der Zündmechanismus in der Richtung betätigt wird, die einer Vergrösserung des relativen Eingreifens der Hülse (3) in den Mutterkörper (2) und einer Kompression der beiden Federn (15, 16) entspricht, dadurch gekennzeichnet, dass einerseits der Querschnitt der Bohrung des Mutterkörpers (2) und derjenige der Hülse (3) einen nicht kreisförmigen Umfang haben, derart dass ihre Ausdehnung (D) in einer Richtung, die nicht durch die Fenster (14) des Mutterkörpers (2) verläuft, grösser ist als in den anderen Richtungen, und dass andererseits der Abstand (L) zwischen den freien Enden der diametral entgegengesetzten Nocken (11) des Schlagbolzens (12) kleiner ist als die genannte grösste Ausdehnung (D) des Querschnitts des Mutterkörpers (2) und der Hülse (3) jedoch grösser als der Abstand zwischen den beiden Fenstern (14) des Mutterkörpers (2).
2. Piezoelektrischer Zündmechanismus nach Anspruch 1, dadurch gekennzeichnet, dass der Querschnitt der Bohrung des Mutterkörpers. (2) und der komplementäre Querschnitt der Hülse (3) die Form eines doppelten Spitzbogens haben.
3. Piezoelektrischer Zündmechanismus nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der untere Endbereich (3a) der Hülse (3) an ihrer Schnittkante in der Nähe der beiden Längsführungsschlitze (9) auf der Seite ihrer grossen Querschnittsausdehnung (D) eine in Richtung auf den betrachteten Längsführungsschlitz geneigte Rampe (21) aufweist, die in der Eingriffsposition an einer der Nocken (11) des Schlagbolzens (12) zur Anlage kommen kann.
EP84420149A 1984-08-31 1984-08-31 Mechanismus für piezoelektrischer Zündeinrichtung Expired EP0172973B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US06/645,603 US4608508A (en) 1984-08-31 1984-08-29 Piezoelectric igniter, especially for a cigarette lighter or the like
DE8484420149T DE3470210D1 (en) 1984-08-31 1984-08-31 Piezoelectric igniter mechanism
EP84420149A EP0172973B1 (de) 1984-08-31 1984-08-31 Mechanismus für piezoelektrischer Zündeinrichtung
AT84420149T ATE33302T1 (de) 1984-08-31 1984-08-31 Mechanismus fuer piezoelektrischer zuendeinrichtung.
ZA846976A ZA846976B (de) 1984-08-31 1984-09-05
AU32796/84A AU565394B2 (en) 1984-08-31 1984-09-06 Piezoelectric cigarette lighter
CA000463011A CA1224840A (fr) 1984-08-31 1984-09-12 Mecanisme d'allumeur piezo-electrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP84420149A EP0172973B1 (de) 1984-08-31 1984-08-31 Mechanismus für piezoelektrischer Zündeinrichtung
ZA846976A ZA846976B (de) 1984-08-31 1984-09-05

Publications (2)

Publication Number Publication Date
EP0172973A1 EP0172973A1 (de) 1986-03-05
EP0172973B1 true EP0172973B1 (de) 1988-03-30

Family

ID=26095527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84420149A Expired EP0172973B1 (de) 1984-08-31 1984-08-31 Mechanismus für piezoelektrischer Zündeinrichtung

Country Status (2)

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EP (1) EP0172973B1 (de)
ZA (1) ZA846976B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2014189A6 (es) * 1989-08-02 1990-06-16 Laforest Sa Mecanismo piezoelectrico para encendedores de gas.
FR2650654B1 (fr) * 1989-08-02 1993-05-21 Laforest Sa Mecanisme piezo-electrique pour briquets a gaz
US5854530A (en) * 1996-12-18 1998-12-29 Bic Corporation Piezoelectric lighter which has a higher level of difficulty for operation
US6046528A (en) * 1997-11-03 2000-04-04 Bic Corporation Selectively actuatable piezoelectric ignition mechanism

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE759564A (fr) * 1969-11-28 1971-04-30 Junkers & Co Dispositif d'allumage piezoelectrique
FR2193955B1 (de) * 1972-07-28 1975-03-07 Genoud & Cie Ets
GB1473449A (en) * 1974-08-09 1977-05-11 Murata Manufacturing Co Piezoelectric igniter
FR2498740B1 (fr) * 1981-01-23 1987-07-03 Rv Const Elect Allumeur piezo-electrique du type a percussion et bouton-poussoir

Also Published As

Publication number Publication date
ZA846976B (de) 1985-03-21
EP0172973A1 (de) 1986-03-05

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