US3819963A - High voltage generating piezoelectric igniter - Google Patents

High voltage generating piezoelectric igniter Download PDF

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Publication number
US3819963A
US3819963A US00327468A US32746873A US3819963A US 3819963 A US3819963 A US 3819963A US 00327468 A US00327468 A US 00327468A US 32746873 A US32746873 A US 32746873A US 3819963 A US3819963 A US 3819963A
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US
United States
Prior art keywords
high voltage
piezoelectric element
pivot
element unit
metal frame
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 - Lifetime
Application number
US00327468A
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English (en)
Inventor
K Kondo
A Ishii
H Takeuchi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 claimed from JP1972015167U external-priority patent/JPS5153903Y2/ja
Priority claimed from JP1972071924U external-priority patent/JPS5122864Y2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of US3819963A publication Critical patent/US3819963A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators

Definitions

  • ABSTRACT A static pressure type high voltage generating device of the kind in which a high voltage is generated by applying a static pressure to piezoel ec t ric elements and which has simple structure, requires only a small operating force and moreover is excellent in durability.
  • the present invention relates to a high voltage generating device in which a high voltage is generated by applying a static pressure to piezoelectric elements.
  • a piezoelectric element is employed to generate high voltage.
  • One is an impact type in which an impulsive force is applied instantaneously to a piezoelectric element and the other is a static pressure type in which a static pressure is applied to a piezoelectric element.
  • the impact type produces high voltage only once and therefore if an ignition system is constructed by employing a high voltage generating device of this type, the resultant ignition system will be suited for use with LP gas or town gas which is highly ignitable, but it will not be used with natural gas which is not easily ignitable.
  • the static pressure type produces high voltage continuously and therefore, if it is incorporated in an ignition system, the resultant ignition system has an advantage in that due to the occurrence of sparks by several discharges, the ignition can be effected positively.
  • a high voltage generating device which comprises a pivot mounted on one inner end of a metal frame and secured to operating levers, a ball mounted in a recess formed on the outer surface of the pivot, and a piezoelectric element unit held between a screw attached to the other end of the metal frame and the ball, whereby the piezoelectric element unit is deviated from the center line of the metal frame joining the pivot and the screw.
  • FIGS. 1 and 2 are sectional views showing an embodiment of a high voltage generating device according to the present invention
  • FIG. 3 is a plan view of the high voltage generating device shown in FIGS. 1 and 2;
  • FIG. 4 is a sectional view of a second embodiment of the high voltage generating device according to the present invention.
  • FIG. 5 is a plan view of FIG. 4;
  • FIG. 6 is a sectional view showing the conditions in the device of the second embodiment in operation
  • FIG. 7 shows a third embodiment having a further improvement according to the invention.
  • FIG. 8 shows a similar modification of the structure of FIG. 3.
  • numeral 1 designates a metal frame having formed therein a chamber 2 which is opened on both sides, and a pivot or cylindrical operating roller 3 is rotatably mounted on one inner end of the metal frame 1.
  • the pivot 3 is formed in a part of the outer surface thereof with a recess 5 into which is fit a pressure member 4, e.g., a cylindrical steel or steel ball.
  • a piezoelectric element unit 12 Disposed in the chamber 2 of the metal frame 1 is a piezoelectric element unit 12 comprising metal pads 6 and 7 provided on both ends of the unit, piezolelectric elements 8 and 9 disposed between the metal pads 6 and 7, a center terminal 10 disposed between the piezoelectric elements 8 and 9, and a housing 11 of a plastic resin, for example, in which the aforesaid members are encapsulated.
  • the metal pad 6 of the piezoelectric element unit 12 is formed with a recess 13 for receiving the steel ball 4, and the other metal pad 7 is formed with a recess for receiving the tip of a screw 14 threadedly secured to the other end of the metal frame 1.
  • One ends of operating levers l6 and 17 are secured to the ends of the pivot 3 and a lever roller 19 is mounted between the other ends of the operating levers 16 and 17 by means of a pin 18.
  • a high voltage lead wire 20 is taken out from the center terminal 10 of the piezoelectric element unit 12.
  • the piezoelectric element unit 12 is supported between the steel ball 4 and the screw 14 making a small angle with the center line of the metal frame 1, i.e., a line X-X' interconnecting the centers of the pivot 3 and the screw 14.
  • the piezoelectric elements 8 and 9 are compressed by an amount corresponding to the displacement thereof so that a high voltage can be continuously delivered from the high voltage lead wire 20.
  • the unit returns from the position of FIG. 2 to a the position shown in FIG. 1.
  • the piezoelectric elements 8 and 9 are brought back to the former condition from the previously compressed condition, the same high voltage as generated during the actuation period is also generated continuously during the restoration period.
  • the first embodiment of the high voltage generating device employs the steel ball combined with the pivot secured to the operating levers to effect the rotational displacement of the piezoelectric element unit, with a simplified structure, a static pressure can be applied to the piezoelectric element unit with a reduced loss of power and moreover a small operating force can result in the application of a large force to the piezoelectric element unit, thereby easily generating a high voltage.
  • the steel ball is employed as a means for transmitting the rotational displacement, very smooth movements of the component parts can be ensured.
  • the required operating force can be reduced and moreover the occurrence of fault can be reduced considerably thus making the device highly efficient in operation.
  • any other balls of conductive materials which are hard and not easily broken and highly rigid, may also be employed.
  • numeral 1 designates the metal frame and the cylindrical pivot 3 is rotatably mounted on one longitudinal end of the frame -1 which acts as a bearing for the pivot 3.
  • the pivot 3 is formed with the recess 5 on the outer surface thereof for receiving a part of the pressure member 4, e.g., a cylindrical member or a steel ball, and the metal pad attached onto the end face of the piezoelectric element 8 is likewise formed with a recess for receiving another part of the steel ball 4.
  • the piezoelectric element unit comprising the pivot 3, the piezoelectric element 8 and so on is assembled with the steel ball 4 being interposed therebetween.
  • a cylindrical rotatable pivot 3' and the metal pad 7 attached to the end face of the other piezoelectric element 9 are assembled, with a steel ball 4' interposed therebetween on g the other longitudinal end of the frame 1.
  • Numeral ll designates the housing containing the piezoelectric elements 8 and 9, 10 the center terminal, 20 the high voltage lead wire.
  • One side of the pivot 3 is abutted against the tip of the clamp screw 14 to adjust the amount of pressure to be applied to the piezoelectric element unit 12.
  • Numeral 21 designates a lock nut for fastening the clamp screw 14 to the frame 1.
  • the piezoelectric element unit 12 is held between the steel balls 4 and 4' making a small angle with the center line of the metal frame 1, i.e., a line joining the centers of the pivots 3 and 3'.
  • Numerals l6, l7 and 22 designate operating levers whose one ends are respectively secured to the ends of the pivots 3 and 3' to be joined together, and the operating levers 22 are connected to the operating levers 16 and 17 by a connecting pin 23.
  • Numeral 24 designates slots formed in the operating levers 16 and 17, in which the connecting pin 23 is moved slidingly.
  • Numeral l9 designates the lever roller for ensuring a smooth actuation provided at the other ends of the operating levers 16 and 17.
  • the high voltage generating device may be constructed as above described and since the ends of the piezoelectric element unit are adapted to be moved slidingly, as compared with the cases where one end of a piezoelectric element unit is fixed, a large strain can be developed in the piezoelectric elements with a smaller stroke and thus high voltage can be easily generated. Accordingly, in contrast to conventional devices, the stroke required for generating the same voltage can be reduced to about one half with resultant greater efficiency in operation. Furthermore, the sliding movements of the ends of the piezoelectric element unit result in a device which ensures an excellent sense of touch on the part of an operator and therefore its practical value is very great.
  • FIG. 7 illustrates a further improvement in which the dimension of a recess 25 (for receiving the pivot 3) formed in the inner end of the metal frame 1 is made larger than that of the pivot 3, for example as shown in FIGS. 7 or 8, so that when the operating levers 16 and 17 are actuated, the pivot 3 is rolled in the recess 25 thereby applying a pressure to the piezoelectric element 'unit.
  • the pivot 3 is rolled in the recess 25 thereby applying a pressure to the piezoelectric element 'unit.
  • pivot 3 rotates rolling along a surface 250 of the recess 25.
  • the same arrangement can also be incorporated in the embodiment of FIGS. 3 to 6 employing two steel balls, which is schematically shown in FIG. 8.
  • the effect of this arrangement is that while, in the embodiments shown respectively in FIGS. 1 to 3 and FIGS. 4 to 6, the mating recess and pivot are in bearing relation and therefore involve sliding friction, in this arrangement of H08. 7 or 8 the rolling contact is produced between the mating recess and pivot and thus the required operating force can be reduced and the operation of the device is further smoothed.
  • a high voltage generating device comprising a metal frame, a pivot mounted on one inner end of said metal frame and secured to a pair of operating levers, said pivot having a recess formed on an outer surface thereof, a ball mounted in said recess, a screw attached to the other end of said metal frame, and a piezoelectric element unit held between said screw and said ball, whereby said piezoelectric element unit is deviated with respect to the center line of said metal frame joining said pivot and said screw.
  • a high voltage generating device wherein the tip of said screw attached to the other end of said metal frame is fit into a recess formed in one of a pair of metal pads constituting part of said piezoelectric element unit.
  • a high voltage generating device wherein a second ball is disposed between said screw attached to the other end of metal frame and said piezoelectric element unit, a portion of said second ball being fit in a recess formed in one of a pair of metal pads constituting part of said piezoelectric element unit.
  • a high voltage generating device wherein a second pivot is disposed between said screw attached to the other end of said metal frame and said piezoelectric element unit, said second pivot having a recess formed in a portion thereof to receive a second ball fit in a recess formed in one of a pair of metal pads constituting part of said piezoelectric element unit, and a second pair of operating levers secured to said second pivot are joined together with said first pair of operating levers.
  • a high voltage generating device wherein a recess is formed in one inner end of said metal frame, and said pivot is rollably mounted in said recess formed in one inner end of said metal frame.
  • a high voltage generating device wherein a second pivot is disposed between said screw attached to the other end of said metal frame and said piezoelectric element unit, said second pivot having a recess formed in a portion thereof to receive a second ball fit in a recess formed in one of a pair of metal pads constituting part of said piezoelectric element unit, and a second pair of operating levers secured to said second pivot are joined together with said first pair of operating levers.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Transmission Devices (AREA)
US00327468A 1972-02-04 1973-01-29 High voltage generating piezoelectric igniter Expired - Lifetime US3819963A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1972015167U JPS5153903Y2 (de) 1972-02-04 1972-02-04
JP1972071924U JPS5122864Y2 (de) 1972-06-16 1972-06-16

Publications (1)

Publication Number Publication Date
US3819963A true US3819963A (en) 1974-06-25

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ID=26351276

Family Applications (1)

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US00327468A Expired - Lifetime US3819963A (en) 1972-02-04 1973-01-29 High voltage generating piezoelectric igniter

Country Status (7)

Country Link
US (1) US3819963A (de)
AR (1) AR198651A1 (de)
AT (1) AT323876B (de)
CA (1) CA963949A (de)
FR (1) FR2170211B1 (de)
GB (1) GB1396081A (de)
IT (1) IT980408B (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912953A (en) * 1973-03-20 1975-10-14 Pilutti Edoardo Device for sources of piezoelectric ignition
US4112322A (en) * 1975-12-23 1978-09-05 Luigi Venturi Piezoelectric gas igniter using open frame
US4158215A (en) * 1977-06-27 1979-06-12 B.P.T. S.P.A. Piezoelectric spark generator, particularly for gas igniters
US4402524A (en) * 1979-06-07 1983-09-06 Marker-Patentverwertungsgesellschaft Mbh Battery-charging generator for electronic ski binding
US5400975A (en) * 1993-11-04 1995-03-28 S. C. Johnson & Son, Inc. Actuators for electrostatically charged aerosol spray systems
US5726522A (en) * 1995-02-27 1998-03-10 Japan Smoking Articles Corporate Association Device for generating high voltage
US5798601A (en) * 1995-06-08 1998-08-25 Hansen; James M. Adjustable retrofit ignition kit for portable gas appliances
US6580177B1 (en) 1999-06-01 2003-06-17 Continuum Control Corporation Electrical power extraction from mechanical disturbances
US6655035B2 (en) 2000-10-20 2003-12-02 Continuum Photonics, Inc. Piezoelectric generator
US20050037862A1 (en) * 2003-08-14 2005-02-17 Hagood Nesbitt W. Method and apparatus for active control of golf club impact
US6995496B1 (en) 1999-06-01 2006-02-07 Continuum Photonics, Inc. Electrical power extraction from mechanical disturbances
US20080129151A1 (en) * 2006-12-02 2008-06-05 Rastegar Jahangir S Piezoelectric generators for munitions fuzing and the like
US20090121587A1 (en) * 2007-11-13 2009-05-14 The Boeing Company Energy shuttle based high energy piezoelectric apparatus and method
US20140252918A1 (en) * 2011-11-09 2014-09-11 Murata Manufacturing Co.,Ltd. Piezoelectric Power Generating Device
US11981204B2 (en) 2018-09-05 2024-05-14 Behr-Hella Thermocontrol Gmbh Vehicle operating unit with tactile feedback

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0136526Y2 (de) * 1984-12-26 1989-11-07
FR2597273B1 (fr) * 1986-04-11 1990-11-16 Commissariat Energie Atomique Paratonnere a dispositif piezoelectrique d'amorcage de l'effet corona

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1076275A (en) * 1963-02-27 1967-07-19 Sapphire Molectric Ltd Improvements in and relating to ignition devices

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912953A (en) * 1973-03-20 1975-10-14 Pilutti Edoardo Device for sources of piezoelectric ignition
US4112322A (en) * 1975-12-23 1978-09-05 Luigi Venturi Piezoelectric gas igniter using open frame
US4158215A (en) * 1977-06-27 1979-06-12 B.P.T. S.P.A. Piezoelectric spark generator, particularly for gas igniters
US4402524A (en) * 1979-06-07 1983-09-06 Marker-Patentverwertungsgesellschaft Mbh Battery-charging generator for electronic ski binding
US5400975A (en) * 1993-11-04 1995-03-28 S. C. Johnson & Son, Inc. Actuators for electrostatically charged aerosol spray systems
WO1995012455A1 (en) * 1993-11-04 1995-05-11 S.C. Johnson & Son, Inc. Actuators for electrostatically charged aerosol spray systems
US5726522A (en) * 1995-02-27 1998-03-10 Japan Smoking Articles Corporate Association Device for generating high voltage
US5798601A (en) * 1995-06-08 1998-08-25 Hansen; James M. Adjustable retrofit ignition kit for portable gas appliances
US6580177B1 (en) 1999-06-01 2003-06-17 Continuum Control Corporation Electrical power extraction from mechanical disturbances
US6995496B1 (en) 1999-06-01 2006-02-07 Continuum Photonics, Inc. Electrical power extraction from mechanical disturbances
US20040108724A1 (en) * 2000-10-20 2004-06-10 Continuum Control Corporation, A Massachusetts Corporation Piezoelectric generator
US6909224B2 (en) 2000-10-20 2005-06-21 Continuum Photonics, Inc. Piezoelectric generator
US6655035B2 (en) 2000-10-20 2003-12-02 Continuum Photonics, Inc. Piezoelectric generator
US20050037862A1 (en) * 2003-08-14 2005-02-17 Hagood Nesbitt W. Method and apparatus for active control of golf club impact
US7780535B2 (en) 2003-08-14 2010-08-24 Head Technology Gmbh, Ltd. Method and apparatus for active control of golf club impact
US20100292024A1 (en) * 2003-08-14 2010-11-18 Head Usa, Inc. Method and apparatus for active control of golf club impact
US20080129151A1 (en) * 2006-12-02 2008-06-05 Rastegar Jahangir S Piezoelectric generators for munitions fuzing and the like
US7701120B2 (en) * 2006-12-02 2010-04-20 Omnitek Partners Llc Piezoelectric generators for munitions fuzing and the like
US20090121587A1 (en) * 2007-11-13 2009-05-14 The Boeing Company Energy shuttle based high energy piezoelectric apparatus and method
US7741757B2 (en) * 2007-11-13 2010-06-22 The Boeing Company Energy shuttle based high energy piezoelectric apparatus and method
US20140252918A1 (en) * 2011-11-09 2014-09-11 Murata Manufacturing Co.,Ltd. Piezoelectric Power Generating Device
US9350273B2 (en) * 2011-11-09 2016-05-24 Murata Manufacturing Co., Ltd. Piezoelectric power generating device having a stress applying member
US11981204B2 (en) 2018-09-05 2024-05-14 Behr-Hella Thermocontrol Gmbh Vehicle operating unit with tactile feedback

Also Published As

Publication number Publication date
AR198651A1 (es) 1974-07-15
DE2305277A1 (de) 1973-08-16
IT980408B (it) 1974-09-30
CA963949A (en) 1975-03-04
AT323876B (de) 1975-08-11
GB1396081A (en) 1975-05-29
FR2170211A1 (de) 1973-09-14
DE2305277B2 (de) 1975-12-18
FR2170211B1 (de) 1977-08-19

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