EP1521288A3 - Magnetron for microwave oven - Google Patents

Magnetron for microwave oven Download PDF

Info

Publication number
EP1521288A3
EP1521288A3 EP04291898A EP04291898A EP1521288A3 EP 1521288 A3 EP1521288 A3 EP 1521288A3 EP 04291898 A EP04291898 A EP 04291898A EP 04291898 A EP04291898 A EP 04291898A EP 1521288 A3 EP1521288 A3 EP 1521288A3
Authority
EP
European Patent Office
Prior art keywords
sealing member
metallic sealing
insulating cylinder
magnetron
wall structural
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.)
Granted
Application number
EP04291898A
Other languages
German (de)
French (fr)
Other versions
EP1521288B1 (en
EP1521288A2 (en
Inventor
Masatoshi Toshiba Hokuto Elect. Co. Higashi
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.)
Toshiba Hokuto Electronics Corp
Original Assignee
Toshiba Hokuto Electronics Corp
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 Toshiba Hokuto Electronics Corp filed Critical Toshiba Hokuto Electronics Corp
Publication of EP1521288A2 publication Critical patent/EP1521288A2/en
Publication of EP1521288A3 publication Critical patent/EP1521288A3/en
Application granted granted Critical
Publication of EP1521288B1 publication Critical patent/EP1521288B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/14—Leading-in arrangements; Seals therefor
    • H01J23/15—Means for preventing wave energy leakage structurally associated with tube leading-in arrangements, e.g. filters, chokes, attenuating devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/44—Rod-type coupling devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H01J23/54—Filtering devices preventing unwanted frequencies or modes to be coupled to, or out of, the interaction circuit; Prevention of high frequency leakage in the environment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • H01J25/58—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having a number of resonators; having a composite resonator, e.g. a helix
    • H01J25/587—Multi-cavity magnetrons

Abstract

A magnetron for microwave oven comprising a metallic sealing member (19) forming a high frequency choke having a cylindrical double wall structural portion, an insulating cylinder (20) joined to the metallic sealing member (19) and an antenna lead (22) passing through the inside of both the metallic sealing member (19) and the insulating cylinder (20), a flat surface (19a) is provided on the annular joining region of the metallic sealing member (19) to the insulating cylinder (20), and further an inside tapered portion whose inner diameter varies gradually and gets dose to the antenna lead (22) is provided on the inner wall structural portion, which becomes a double wall structural portion, of the metallic sealing member (19) as is continuing into the annular flat surface.
EP04291898A 2003-07-30 2004-07-26 Magnetron for microwave oven Active EP1521288B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003203546A JP3944470B2 (en) 2003-07-30 2003-07-30 Magnetron for microwave oven
JP2003203546 2003-07-30

Publications (3)

Publication Number Publication Date
EP1521288A2 EP1521288A2 (en) 2005-04-06
EP1521288A3 true EP1521288A3 (en) 2008-01-09
EP1521288B1 EP1521288B1 (en) 2008-09-03

Family

ID=34262860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04291898A Active EP1521288B1 (en) 2003-07-30 2004-07-26 Magnetron for microwave oven

Country Status (5)

Country Link
EP (1) EP1521288B1 (en)
JP (1) JP3944470B2 (en)
KR (1) KR101010755B1 (en)
CN (1) CN100511565C (en)
DE (1) DE602004016261D1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4898234B2 (en) * 2006-01-30 2012-03-14 東芝ホクト電子株式会社 Magnetron
WO2010097882A1 (en) 2009-02-27 2010-09-02 パナソニック株式会社 Magnetron and microwave utilization device
JP5676980B2 (en) * 2010-08-31 2015-02-25 東芝ホクト電子株式会社 Magnetron and manufacturing method thereof
CN103531419B (en) * 2013-10-25 2016-02-10 电子科技大学 A kind of microwave heating magnetron tube core
JP6723043B2 (en) 2016-03-25 2020-07-15 東芝ホクト電子株式会社 Magnetron
CN109155223A (en) 2016-05-17 2019-01-04 东芝北斗电子株式会社 Magnetron

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61288347A (en) * 1985-06-14 1986-12-18 Toshiba Corp Magnetron for microwave oven
JPH04167334A (en) * 1990-10-31 1992-06-15 Toshiba Corp Magnetron for microwave oven
EP1391909A2 (en) * 2002-07-31 2004-02-25 Matsushita Electric Industrial Co., Ltd. Magnetron

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0648151A (en) * 1992-07-24 1994-02-22 Zexel Corp Air conditioner for vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61288347A (en) * 1985-06-14 1986-12-18 Toshiba Corp Magnetron for microwave oven
JPH04167334A (en) * 1990-10-31 1992-06-15 Toshiba Corp Magnetron for microwave oven
EP1391909A2 (en) * 2002-07-31 2004-02-25 Matsushita Electric Industrial Co., Ltd. Magnetron

Also Published As

Publication number Publication date
KR20050014696A (en) 2005-02-07
JP2005050572A (en) 2005-02-24
EP1521288B1 (en) 2008-09-03
CN100511565C (en) 2009-07-08
DE602004016261D1 (en) 2008-10-16
EP1521288A2 (en) 2005-04-06
KR101010755B1 (en) 2011-01-25
CN1577701A (en) 2005-02-09
JP3944470B2 (en) 2007-07-11

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