JP7008185B2 - Magnetron and microwave heating device equipped with it - Google Patents

Magnetron and microwave heating device equipped with it Download PDF

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JP7008185B2
JP7008185B2 JP2019527658A JP2019527658A JP7008185B2 JP 7008185 B2 JP7008185 B2 JP 7008185B2 JP 2019527658 A JP2019527658 A JP 2019527658A JP 2019527658 A JP2019527658 A JP 2019527658A JP 7008185 B2 JP7008185 B2 JP 7008185B2
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magnetron
joint iron
frame
engaging
iron
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JPWO2019009173A1 (en
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健 石井
克彦 金田
雄一 水野
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Panasonic Intellectual Property Management Co Ltd
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    • 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
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/10—Magnet systems for directing or deflecting the discharge along a desired path, e.g. a spiral path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • 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
    • H01J23/12—Vessels; Containers
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F2003/103—Magnetic circuits with permanent magnets

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microwave Tubes (AREA)

Description

本開示は、解体困難なマグネトロンとこのマグネトロンを備えたマイクロ波加熱装置に関する。 The present disclosure relates to a magnetron that is difficult to disassemble and a microwave heating device equipped with this magnetron.

従来、マイクロ波発生装置であるマグネトロンは、機能面からその構造を分類すると、磁気回路部、冷却回路部、ＬＣフィルター回路部、および、コアチューブから構成される。コアチューブは、アンテナ部を有するトップシェル部と、陽極部と、陰極部とから構成される。 Conventionally, a magnetron, which is a microwave generator, is composed of a magnetic circuit unit, a cooling circuit unit, an LC filter circuit unit, and a core tube when the structure is classified from the functional aspect. The core tube is composed of a top shell portion having an antenna portion, an anode portion, and a cathode portion.

マグネトロンは、陽極部と陰極部との間に印加された直流エネルギーを、直交静電磁界が形成された陽極・陰極間の作用空間における電子運動を介して、高周波エネルギーに変換し、マイクロ波を発生する電子管である。マグネトロンは、発振効率が比較的高く大出力化が容易なことから、電子レンジなどのマイクロ波加熱装置のためのマイクロ波発生装置として広く用いられる（例えば、特許文献１参照）。 The magnetron converts the DC energy applied between the anode part and the cathode part into high-frequency energy through the electron motion in the working space between the anode and the cathode where the orthogonal electrostatic field is formed, and converts the microwave into microwaves. It is an electron tube that is generated. Magnetrons are widely used as microwave generators for microwave heating devices such as microwave ovens because of their relatively high oscillation efficiency and easy increase in output (see, for example, Patent Document 1).

図６は、従来のマグネトロンの斜視図である。図７は、従来のマグネトロンのコアチューブの断面図である。図８は、従来のマグネトロンのコアチューブを除く外装部品の断面図である。 FIG. 6 is a perspective view of a conventional magnetron. FIG. 7 is a cross-sectional view of a conventional magnetron core tube. FIG. 8 is a cross-sectional view of exterior parts excluding the core tube of a conventional magnetron.

これらの図において、一般的なマグネトロンのコアチューブ１９は、真空封止することにより形成される。マグネトロンの陰極部の中心部に、コイル状のフィラメント１が配置される。フィラメント１は、センターリード４とサイドリード５によって支持される。センターリード４は、フィラメント１の両端に設けられたエンドハット２、エンドハット３を介してサイドリード５に接続される。 In these figures, a typical magnetron core tube 19 is formed by vacuum sealing. A coil-shaped filament 1 is arranged at the center of the cathode portion of the magnetron. The filament 1 is supported by a center lead 4 and a side lead 5. The center lead 4 is connected to the side lead 5 via end hats 2 and end hats 3 provided at both ends of the filament 1.

マグネトロンの陽極部は、陽極円筒６と、陽極円筒６の内周面からフィラメント１に向かって突出するように設けられた偶数枚のベイン７とを備える。ベイン７は、フィラメント１と所定間隔を保つように設けられる。ベイン７と陽極円筒６の内周壁面との間で、空胴共振器８が構成される。 The anode portion of the magnetron includes an anode cylinder 6 and an even number of vanes 7 provided so as to project from the inner peripheral surface of the anode cylinder 6 toward the filament 1. The vane 7 is provided so as to maintain a predetermined distance from the filament 1. An air body resonator 8 is configured between the vane 7 and the inner peripheral wall surface of the anode cylinder 6.

陽極円筒６の管軸方向の両端部には、略同一形状ですり鉢状の一対の磁極部９、１０が対向するように配置される。入力部１２は、磁極部９の管軸方向の端部外側に設けられ、フィラメント１に加熱電力およびマグネトロン駆動用高電圧を供給する。出力部１１は、磁極部１０の管軸方向の端部外側に設けられ、陽極部に発生したマイクロ波を放射する。出力部１１、入力部１２により、真空壁で覆われたコアチューブ１９が構成される。 A pair of mortar-shaped magnetic pole portions 9 and 10 having substantially the same shape are arranged at both ends of the anode cylinder 6 in the tube axis direction so as to face each other. The input unit 12 is provided on the outside of the end portion of the magnetic pole portion 9 in the tube axis direction, and supplies heating power and a high voltage for driving a magnetron to the filament 1. The output unit 11 is provided on the outside of the end portion of the magnetic pole portion 10 in the tube axis direction, and radiates microwaves generated in the anode portion. The output unit 11 and the input unit 12 form a core tube 19 covered with a vacuum wall.

次に、コアチューブ１９以外の外装部品について説明する。一対の環状永久磁石１３、１４の一方の磁極面が、磁極部９、１０と磁気的に結合される。それとともに、一対の環状永久磁石１３、１４の他方の磁極面が、枠状継鉄１５、１６に磁気的に結合される。これにより、磁気回路が構成される。枠状継鉄１５、１６は、強磁性体から成り、断面が四角形状に組み合わされる。 Next, exterior parts other than the core tube 19 will be described. One magnetic pole surface of the pair of annular permanent magnets 13 and 14 is magnetically coupled to the magnetic pole portions 9 and 10. At the same time, the other magnetic pole surfaces of the pair of annular permanent magnets 13 and 14 are magnetically coupled to the frame-shaped joint irons 15 and 16. This constitutes a magnetic circuit. The frame-shaped joint irons 15 and 16 are made of a ferromagnet, and their cross sections are combined in a rectangular shape.

その結果、フィラメント１とベイン７との間に形成される電子運動空間１７に、直流磁界が供給される。 As a result, a DC magnetic field is supplied to the electron motion space 17 formed between the filament 1 and the vane 7.

上記マグネトロンにおいて、フィラメント１を加熱し、フィラメント１とベイン７との間に、所定の直流高電圧を印加することにより、フィラメント１からベイン７に向かって電子が放出される。 In the magnetron, electrons are emitted from the filament 1 toward the vane 7 by heating the filament 1 and applying a predetermined DC high voltage between the filament 1 and the vane 7.

この電子が、フィラメント１とベイン７との間の電子運動空間１７において、直交する電磁界の作用を受ける。この電子が、フィラメント１の周囲を旋回しながら周回し、ベイン７に向う。この電子が、分割されたベイン７内の空胴共振器８に生じた２，４５０ＭＨｚ帯の微弱なマイクロ波と相互作用を起こすことにより、空胴共振器８内に大なるマイクロ波が発生する。 These electrons are subjected to the action of orthogonal electromagnetic fields in the electron motion space 17 between the filament 1 and the vane 7. These electrons orbit around the filament 1 while swirling toward Bain 7. When this electron interacts with the weak microwave in the 2,450 MHz band generated in the cavity resonator 8 in the divided vane 7, a large microwave is generated in the cavity resonator 8. ..

空胴共振器８内に発生したマイクロ波は、ベイン７の一つと電気的に結合されたアンテナリード１８によって伝送され、出力部１１を介して電子レンジの加熱室内に放射される。 The microwave generated in the cavity resonator 8 is transmitted by the antenna lead 18 electrically coupled to one of the vanes 7 and radiated into the heating chamber of the microwave oven via the output unit 11.

米国特許第８２６４１５０号明細書U.S. Pat. No. 8,264,150

上記従来の構成において、コアチューブ１９以外の部品は、半永久的に使用可能である。このため、ネジ２１の脱着などの簡単な作業で、マグネトロンの解体、コアチューブ１９の交換が行える。従って、部品を純正でない部品に交換するなど、マグネトロンが製造業者が保証する範囲外の方法で使用されることがある。これが、不安定動作を引き起こし、寿命を短縮する。 In the above-mentioned conventional configuration, the parts other than the core tube 19 can be used semi-permanently. Therefore, the magnetron can be disassembled and the core tube 19 can be replaced by a simple operation such as attaching / detaching the screw 21. Therefore, magnetrons may be used in ways outside the manufacturer's warranty, such as replacing parts with non-genuine parts. This causes unstable operation and shortens the life.

本開示は、部品を破壊しない限り解体できない、信頼性の高いマグネトロンを提供することを目的とする。 The present disclosure is intended to provide a highly reliable magnetron that cannot be disassembled without destroying the parts.

本開示の一態様のマグネトロンは、永久磁石と、第１継鉄と第２継鉄とを接合して構成された継鉄とで構成された磁気回路を有する。本態様のマグネトロンはさらに、切欠き部と、突起状の爪部と、鉤状の係合突起と、孔部と、係合部とを有する。切欠き部は、第１継鉄の二つの端部の少なくとも一方の中央に形成される。爪部は、切欠き部内に第１継鉄と一体的に形成される。係合突起は、爪部の先端部に形成される。孔部は、爪部に対向するように第２継鉄の端部に形成される。係合部は、係合突起と係合することで第１継鉄と第２継鉄とを接合するように、孔部に設けられる。 The magnetron of one aspect of the present disclosure has a magnetic circuit composed of a permanent magnet and a joint iron formed by joining a first joint iron and a second joint iron. The magnetron of this embodiment further has a notch, a protruding claw, a hook-shaped engaging protrusion, a hole, and an engaging portion. The notch is formed in the center of at least one of the two ends of the first joint iron. The claw portion is integrally formed with the first joint iron in the notch portion. The engaging protrusion is formed on the tip of the claw portion. The hole portion is formed at the end portion of the second joint iron so as to face the claw portion. The engaging portion is provided in the hole portion so as to join the first joint iron and the second joint iron by engaging with the engaging protrusion.

本態様によれば、部品を純正でない部品に交換するなど、マグネトロンが製造業者の保証範囲外の方法で使用されないようにすることができる。これにより、不安定動作を抑制し、寿命の短縮を防止することができる。その結果、部品を破壊しない限り解体できない、信頼性の高いマグネトロンを提供することができる。 According to this aspect, the magnetron can be prevented from being used in a manner outside the manufacturer's warranty, such as replacing the part with a non-genuine part. As a result, unstable operation can be suppressed and the life can be prevented from being shortened. As a result, it is possible to provide a highly reliable magnetron that cannot be disassembled unless the parts are destroyed.

図１は、本開示の実施の形態１に係るマグネトロンの斜視図である。FIG. 1 is a perspective view of a magnetron according to the first embodiment of the present disclosure. 図２は、実施の形態１に係るマグネトロンのコアチューブを除く外装部品の断面図である。FIG. 2 is a cross-sectional view of an exterior component excluding the core tube of the magnetron according to the first embodiment. 図３は、入力側枠状継鉄の爪部を折り曲げる前の、実施の形態１に係るマグネトロンの部分拡大図である。FIG. 3 is a partially enlarged view of the magnetron according to the first embodiment before bending the claw portion of the input side frame-shaped joint iron. 図４Ａは、入力側枠状継鉄の爪部が折り曲げられ、外側から見た、実施の形態１に係るマグネトロンの部分拡大図である。FIG. 4A is a partially enlarged view of the magnetron according to the first embodiment, in which the claw portion of the input side frame-shaped joint iron is bent and viewed from the outside. 図４Ｂは、入力側枠状継鉄の爪部が折り曲げられ、内側から見た、実施の形態１に係るマグネトロンの部分拡大図である。FIG. 4B is a partially enlarged view of the magnetron according to the first embodiment, in which the claw portion of the input side frame-shaped joint iron is bent and viewed from the inside. 図５は、本開示の実施の形態２に係るマグネトロンの継鉄の部分拡大図である。FIG. 5 is a partially enlarged view of the joint iron of the magnetron according to the second embodiment of the present disclosure. 図６は、従来のマグネトロンの斜視図である。FIG. 6 is a perspective view of a conventional magnetron. 図７は、従来のマグネトロンのコアチューブの断面図である。FIG. 7 is a cross-sectional view of a conventional magnetron core tube. 図８は、従来のマグネトロンのコアチューブを除く外装部品の断面図である。FIG. 8 is a cross-sectional view of exterior parts excluding the core tube of a conventional magnetron.

本開示の第１の態様のマグネトロンは、永久磁石と、第１継鉄と第２継鉄とを接合して構成された継鉄とで構成された磁気回路を有する。本態様のマグネトロンはさらに、切欠き部と、突起状の爪部と、鉤状の係合突起と、孔部と、係合部とを有する。切欠き部は、第１継鉄の二つの端部の少なくとも一方の中央に形成される。爪部は、切欠き部内に第１継鉄と一体的に形成される。係合突起は、爪部の先端部に形成される。孔部は、爪部に対向するように第２継鉄の端部に形成される。係合部は、係合突起と係合することで第１継鉄と第２継鉄とを接合するように、孔部に設けられる。 The magnetron of the first aspect of the present disclosure has a magnetic circuit composed of a permanent magnet and a joint iron formed by joining a first joint iron and a second joint iron. The magnetron of this embodiment further has a notch, a protruding claw, a hook-shaped engaging protrusion, a hole, and an engaging portion. The notch is formed in the center of at least one of the two ends of the first joint iron. The claw portion is integrally formed with the first joint iron in the notch portion. The engaging protrusion is formed on the tip of the claw portion. The hole portion is formed at the end portion of the second joint iron so as to face the claw portion. The engaging portion is provided in the hole portion so as to join the first joint iron and the second joint iron by engaging with the engaging protrusion.

本開示の第２の態様のマグネトロンでは、第１の態様に加えて、爪部は、孔部の方向に屈曲する。 In the magnetron of the second aspect of the present disclosure, in addition to the first aspect, the claw portion bends in the direction of the hole portion.

本開示の第３の態様のマグネトロンでは、第１の態様に加えて、孔部は、内部に係合部が設けられてＬ字形状を有する。 In the magnetron of the third aspect of the present disclosure, in addition to the first aspect, the hole portion is provided with an engaging portion inside and has an L-shape.

本開示の第４の態様のマグネトロンでは、第１の態様に加えて、爪部は、複数の係合突起を有してＴ字形状を有し、孔部には、複数の係合突起がそれぞれ係合する複数の係合部が設けられる。 In the magnetron of the fourth aspect of the present disclosure, in addition to the first aspect, the claw portion has a plurality of engaging protrusions and has a T-shape, and the hole portion has a plurality of engaging protrusions. A plurality of engaging portions to be engaged with each are provided.

本開示の第５の態様は、第１の態様のマグネトロンを備えたマイクロ波加熱装置である。 A fifth aspect of the present disclosure is a microwave heating device provided with the magnetron of the first aspect.

以下、本開示の実施の形態について、図面を参照しながら説明する。 Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

（実施の形態１）
図１は、本開示の実施の形態１に係るマグネトロンの斜視図である。図２は、本実施の形態に係るマグネトロンのコアチューブを除く外装部品の断面図である。図３は、入力側枠状継鉄の爪部を折り曲げる前の、本実施の形態に係るマグネトロンの部分拡大図である。(Embodiment 1)
FIG. 1 is a perspective view of a magnetron according to the first embodiment of the present disclosure. FIG. 2 is a cross-sectional view of exterior parts excluding the core tube of the magnetron according to the present embodiment. FIG. 3 is a partially enlarged view of the magnetron according to the present embodiment before bending the claw portion of the input side frame-shaped joint iron.

図４Ａは、入力側枠状継鉄の爪部が折り曲げられ、外側から見た、本実施の形態に係るマグネトロンの部分拡大図である。図４Ｂは、入力側枠状継鉄の爪部が折り曲げられ、内側から見た、本実施の形態に係るマグネトロンの部分拡大図である。 FIG. 4A is a partially enlarged view of the magnetron according to the present embodiment, in which the claw portion of the input side frame-shaped joint iron is bent and viewed from the outside. FIG. 4B is a partially enlarged view of the magnetron according to the present embodiment when the claw portion of the input side frame-shaped joint iron is bent and viewed from the inside.

図１、図２に示すように、枠状継鉄１５は、断面がＵ字形状を有するように配置される。枠状継鉄１６は、断面が逆Ｕ字形状を有するように配置される。 As shown in FIGS. 1 and 2, the frame-shaped joint iron 15 is arranged so that the cross section has a U-shape. The frame-shaped joint iron 16 is arranged so that the cross section has an inverted U shape.

枠状継鉄１５と枠状継鉄１６とは、それらの端部が重なるように配置される。この状態で、枠状継鉄１５と枠状継鉄１６とを組み合わせることにより、四角形状の断面を有する筒状の枠状継鉄が形成される。本実施の形態では、枠状継鉄１５、１６は、第１継鉄、第２継鉄にそれぞれ相当する。 The frame-shaped joint iron 15 and the frame-shaped joint iron 16 are arranged so that their ends overlap with each other. In this state, by combining the frame-shaped joint iron 15 and the frame-shaped joint iron 16, a tubular frame-shaped joint iron having a quadrangular cross section is formed. In the present embodiment, the frame-shaped joint irons 15 and 16 correspond to the first joint iron and the second joint iron, respectively.

図３に示すように、枠状継鉄１５の二つの端部の略中央には、切欠き部１５１が形成される。切欠き部１５１内には、突起状の爪部２０１が枠状継鉄１５と一体的に形成される。爪部２０１の先端部には、鉤状の係合突起２０２が形成される。本実施の形態では、爪部２０１は接合部に相当する。 As shown in FIG. 3, a notch 151 is formed at substantially the center of the two ends of the frame-shaped joint iron 15. In the notch portion 151, a protruding claw portion 201 is integrally formed with the frame-shaped joint iron 15. A hook-shaped engaging protrusion 202 is formed at the tip of the claw portion 201. In the present embodiment, the claw portion 201 corresponds to the joint portion.

図１、図３に示すように、枠状継鉄１６の二つの両端部の略中央に、孔部１６１が形成される。図４Ａ、図４Ｂに示すように、孔部１６１は、枠状継鉄１５の爪部２０１に対向するように設けられる。孔部１６１内に係合部１６２が形成されるため、孔部１６１は略Ｌ字形状を有する。 As shown in FIGS. 1 and 3, a hole portion 161 is formed at substantially the center of both end portions of the frame-shaped joint iron 16. As shown in FIGS. 4A and 4B, the hole portion 161 is provided so as to face the claw portion 201 of the frame-shaped joint iron 15. Since the engaging portion 162 is formed in the hole portion 161, the hole portion 161 has a substantially L-shape.

マグネトロンを組み立てる時は、枠状継鉄１５に形成された孔を囲むように、枠状継鉄１５の内側中央部に環状永久磁石１３を置く。組み立てられたコアチューブ１９の入力側を、環状永久磁石１３および枠状継鉄１５に挿入する。コアチューブ１９の出力側を、環状永久磁石１４および枠状継鉄１６に挿入する。枠状継鉄１５、１６の重なり部分にリベットを打つことにより、枠状継鉄１５と枠状継鉄１６とを組み合わせると、四角形状の断面を有する筒状の枠状継鉄が形成される。 When assembling the magnetron, an annular permanent magnet 13 is placed in the inner central portion of the frame-shaped joint iron 15 so as to surround the hole formed in the frame-shaped joint iron 15. The input side of the assembled core tube 19 is inserted into the annular permanent magnet 13 and the frame-shaped joint iron 15. The output side of the core tube 19 is inserted into the annular permanent magnet 14 and the frame-shaped joint iron 16. By riveting the overlapping portion of the frame-shaped joint irons 15 and 16, when the frame-shaped joint iron 15 and the frame-shaped joint iron 16 are combined, a tubular frame-shaped joint iron having a square cross section is formed. ..

爪部２０１が孔部１６１の方向に約９０°、カシメにより折り曲げられて、孔部１６１の周縁部分に係合する。枠状継鉄１５の爪部２０１が枠状継鉄１６の孔部１６１に係合して、枠状継鉄１５、１６が固定されると、マグネトロンは解体できないようになる。 The claw portion 201 is bent by caulking at about 90 ° in the direction of the hole portion 161 to engage with the peripheral edge portion of the hole portion 161. When the claw portion 201 of the frame-shaped joint iron 15 engages with the hole portion 161 of the frame-shaped joint iron 16 and the frame-shaped joint irons 15 and 16 are fixed, the magnetron cannot be disassembled.

本実施の形態では、爪部２０１の折り曲げ角度は約９０°である。折り曲げ角度が９０°以上であれば、枠状継鉄１５、１６は確実に係合する。 In the present embodiment, the bending angle of the claw portion 201 is about 90 °. If the bending angle is 90 ° or more, the frame-shaped joint irons 15 and 16 are securely engaged.

このように、本実施の形態では、枠状継鉄１５と枠状継鉄１６との少なくとも一方に一体的に設けられた爪部２０１（接合部）の塑性変形（カシメ）により、枠状継鉄１５と枠状継鉄１６とが接合される。 As described above, in the present embodiment, the frame-shaped joint is formed by the plastic deformation (caulking) of the claw portion 201 (joint portion) integrally provided on at least one of the frame-shaped joint iron 15 and the frame-shaped joint iron 16. The iron 15 and the frame-shaped joint iron 16 are joined.

本実施の形態では、爪部２０１の先端部に、鉤状の係合突起２０２が形成される。係合突起２０２は、いわばＬ字形状を有する。しかし、爪部２０１はＴ字形状を有してもよい。この場合、孔部１６１内に二つの係合部１６２が形成されればよい。 In the present embodiment, a hook-shaped engaging protrusion 202 is formed at the tip of the claw portion 201. The engaging protrusion 202 has a so-called L-shape. However, the claw portion 201 may have a T-shape. In this case, it is sufficient that two engaging portions 162 are formed in the hole portion 161.

本実施の形態では、枠状継鉄１５、１６の重なり部分にリベットを打ち、枠状継鉄１５と枠状継鉄１６とを固定する。しかし、これに限定されるものではなく、例えば、タッピングねじにより、枠状継鉄１５と枠状継鉄１６とを固定してもよい。 In the present embodiment, rivets are placed on the overlapping portions of the frame-shaped joint irons 15 and 16 to fix the frame-shaped joint irons 15 and the frame-shaped joint irons 16. However, the present invention is not limited to this, and for example, the frame-shaped joint iron 15 and the frame-shaped joint iron 16 may be fixed by tapping screws.

以上のように、本実施の形態によれば、部品を純正でない部品に交換するなど、マグネトロンが製造業者の保証範囲外の方法で使用されないようにすることができる。これにより、不安定動作を抑制し、寿命の短縮を防止することができる。その結果、部品を破壊しない限り解体できない、信頼性の高いマグネトロンを提供することができる。 As described above, according to the present embodiment, it is possible to prevent the magnetron from being used by a method outside the manufacturer's warranty, such as replacing a part with a non-genuine part. As a result, unstable operation can be suppressed and the life can be prevented from being shortened. As a result, it is possible to provide a highly reliable magnetron that cannot be disassembled unless the parts are destroyed.

（実施の形態２）
以下、本開示の実施の形態２について説明する。以下の説明において、実施の形態１と同一または相当部分には同一符号を付し、重複する説明を省略する。(Embodiment 2)
Hereinafter, Embodiment 2 of the present disclosure will be described. In the following description, the same or corresponding parts as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.

図５は、本実施の形態に係るマグネトロンの継鉄の部分拡大図である。本実施の形態は、爪部２０３が折り曲げられて孔部１６３に係合するという点で、実施の形態１と同じである。しかしながら、本実施の形態は、以下の点で実施の形態１と相違する。 FIG. 5 is a partially enlarged view of the joint iron of the magnetron according to the present embodiment. The present embodiment is the same as the first embodiment in that the claw portion 203 is bent and engages with the hole portion 163. However, this embodiment differs from the first embodiment in the following points.

図５に示すように、本実施の形態において、爪部２０３には、係合突起２０２が設けられておらず、孔部１６３には、係合部１６２が設けられていない。本実施の形態では、爪部２０３は、９０°以上折り曲げられて、固着されることが好ましい。 As shown in FIG. 5, in the present embodiment, the claw portion 203 is not provided with the engaging protrusion 202, and the hole portion 163 is not provided with the engaging portion 162. In the present embodiment, it is preferable that the claw portion 203 is bent by 90 ° or more and fixed.

以上のように、本実施の形態によれば、部品を純正でない部品に交換するなど、マグネトロンが製造業者の保証範囲外の方法で使用されないようにすることができる。これにより、不安定動作を抑制し、寿命の短縮を防止することができる。その結果、部品を破壊しない限り解体できない、信頼性の高いマグネトロンを提供することができる。 As described above, according to the present embodiment, it is possible to prevent the magnetron from being used by a method outside the manufacturer's warranty, such as replacing a part with a non-genuine part. As a result, unstable operation can be suppressed and the life can be prevented from being shortened. As a result, it is possible to provide a highly reliable magnetron that cannot be disassembled unless the parts are destroyed.

本開示は、マグネトロンに適用可能である。 The present disclosure is applicable to magnetrons.

１ フィラメント
２、３ エンドハット
４ センターリード
５ サイドリード
６ 陽極円筒
７ ベイン
８ 空胴共振器
９、１０ 磁極部
１１ 出力部
１２ 入力部
１３、１４ 環状永久磁石
１５、１６ 枠状継鉄
１７ 電子運動空間
１８ アンテナリード
１９ コアチューブ
２１ ネジ
１５１ 切欠き部
１６１、１６３ 孔部
１６２ 係合部
２０１、２０３ 爪部
２０２ 係合突起1 Filament 2, 3 End hat 4 Center lead 5 Side lead 6 Anode cylinder 7 Bain 8 Empty body resonator 9, 10 Magnetic pole 11 Output part 12 Input part 13, 14 Circular permanent magnet 15, 16 Frame-shaped joint iron 17 Electronic motion Space 18 Antenna lead 19 Core tube 21 Screw 151 Notch 161, 163 Hole 162 Engagement part 201, 203 Claw part 202 Engagement protrusion

Claims (5)

永久磁石と、第１継鉄と第２継鉄とを接合して構成された継鉄とで構成された磁気回路を有するマグネトロンであって、
前記第１継鉄の二つの端部の少なくとも一方の中央に形成された切欠き部と、
前記切欠き部内に前記第１継鉄と一体的に形成された突起状の爪部と、
前記爪部の先端部に形成された鉤状の係合突起と、
前記爪部に対向するように前記第２継鉄の端部に形成された孔部と、
前記係合突起と係合することで前記第１継鉄と前記第２継鉄とを接合するように、前記孔部に設けられた係合部と、
を有する、マグネトロン。 A magnetron having a magnetic circuit composed of a permanent magnet and a joint iron formed by joining a first joint iron and a second joint iron .
A notch formed in the center of at least one of the two ends of the first joint iron,
A protruding claw portion integrally formed with the first joint iron in the notch portion,
A hook-shaped engaging protrusion formed on the tip of the claw and
A hole formed at the end of the second iron so as to face the claw portion, and a hole portion formed at the end portion of the second joint iron.
With the engaging portion provided in the hole portion so as to join the first joint iron and the second joint iron by engaging with the engaging protrusion,
Have a magnetron. 前記爪部が、前記孔部の方向に屈曲する、請求項１に記載のマグネトロン。 The magnetron according to claim 1 , wherein the claw portion bends in the direction of the hole portion . 前記孔部が、内部に前記係合部が設けられてＬ字形状を有する、請求項１に記載のマグネトロン。 The magnetron according to claim 1 , wherein the hole portion is provided with the engaging portion inside and has an L-shape . 前記爪部が、複数の前記係合突起を有してＴ字形状を有し、
前記孔部には、前記複数の前記係合突起がそれぞれ係合する複数の前記係合部が設けられた、請求項１に記載のマグネトロン。 The claw portion has a plurality of the engaging protrusions and has a T-shape.
The magnetron according to claim 1 , wherein the holes are provided with a plurality of engaging portions in which the plurality of engaging protrusions are engaged with each other . 請求項１に記載のマグネトロンを備えたマイクロ波加熱装置。 The microwave heating device provided with the magnetron according to claim 1.
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