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WO2019009173A1 - Magnetron and microwave heating device equipped with same - Google Patents

Magnetron and microwave heating device equipped with same Download PDF

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Publication number
WO2019009173A1
WO2019009173A1 PCT/JP2018/024536 JP2018024536W WO2019009173A1 WO 2019009173 A1 WO2019009173 A1 WO 2019009173A1 JP 2018024536 W JP2018024536 W JP 2018024536W WO 2019009173 A1 WO2019009173 A1 WO 2019009173A1
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WO
WIPO (PCT)
Prior art keywords
yoke
magnetron
frame
shaped
present
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.)
Ceased
Application number
PCT/JP2018/024536
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French (fr)
Japanese (ja)
Inventor
石井　健
克彦 金田
雄一 水野
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 Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management 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
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to CN201880041041.1A priority Critical patent/CN110770873B/en
Priority to JP2019527658A priority patent/JP7008185B2/en
Priority to EP18828642.1A priority patent/EP3651179A4/en
Publication of WO2019009173A1 publication Critical patent/WO2019009173A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

Definitions

  • the present disclosure relates to a magnetron that is difficult to disassemble and a microwave heating apparatus provided with the magnetron.
  • the structure of the magnetron which is a microwave generator, is classified from the functional aspect, it is composed of a magnetic circuit unit, a cooling circuit unit, an LC filter circuit unit, and a core tube.
  • the core tube is composed of a top shell portion having an antenna portion, an anode portion, and a cathode portion.
  • the magnetron converts direct current energy applied between the anode part and the cathode part into high frequency energy through electronic motion in the working space between the anode and the cathode where the orthogonal electrostatic magnetic field is formed, and microwaves It is an electron tube that occurs.
  • a magnetron is widely used as a microwave generator for a microwave heating apparatus such as an microwave oven, since the oscillation efficiency is relatively high and the output can be easily increased (for example, see Patent Document 1).
  • FIG. 6 is a perspective view of a conventional magnetron.
  • FIG. 7 is a cross-sectional view of a core tube of a conventional magnetron.
  • FIG. 8 is a cross-sectional view of the exterior component excluding the core tube of the conventional magnetron.
  • the core tube 19 of a general magnetron is formed by vacuum sealing.
  • a coiled filament 1 is disposed at the center of the cathode of the magnetron.
  • the filament 1 is supported by the center lead 4 and the side leads 5.
  • the center lead 4 is connected to the side lead 5 via an end hat 2 and an end hat 3 provided at both ends of the filament 1.
  • the anode part of the magnetron comprises 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 vanes 7 are provided to keep a predetermined distance from the filament 1.
  • a cavity resonator 8 is formed between the vane 7 and the inner peripheral wall surface of the anode cylinder 6.
  • a pair of bowl-shaped magnetic pole portions 9 and 10 having substantially the same shape are disposed to face each other.
  • the input unit 12 is provided outside the end in the tube axis direction of the magnetic pole unit 9 and supplies the heating power and the high voltage for driving the magnetron to the filament 1.
  • the output portion 11 is provided outside the end portion of the magnetic pole portion 10 in the tube axis direction, and radiates the microwave generated in the anode portion.
  • the output unit 11 and the input unit 12 constitute a core tube 19 covered with a vacuum wall.
  • the frame-shaped yokes 15, 16 are made of a ferromagnetic material and are combined in a rectangular shape in cross section.
  • the filament 1 is heated and electrons are emitted from the filament 1 toward the vane 7 by applying a predetermined high DC voltage between the filament 1 and the vane 7.
  • the electrons are subjected to the action of orthogonal electromagnetic fields in the electron motion space 17 between the filament 1 and the vane 7.
  • the electrons orbit around the filament 1 and travel to the vane 7.
  • the electrons interact with the weak microwaves of the 2,450 MHz band generated in the cavity resonator 8 in the divided vane 7 to generate large microwaves in the cavity resonator 8. .
  • the microwaves generated in the cavity resonator 8 are transmitted by the antenna lead 18 electrically coupled to one of the vanes 7 and radiated into the heating chamber of the microwave oven through the output section 11.
  • parts other than the core tube 19 can be used semipermanently. Therefore, disassembly of the magnetron and replacement of the core tube 19 can be performed by a simple operation such as removal of the screw 21. Therefore, the magnetron may be used in a manner beyond the manufacturer's warranty, such as replacing the part with a non-genuine part. This causes unstable operation and shortens the life.
  • the present disclosure aims to provide a reliable magnetron which can not be disassembled unless parts are destroyed.
  • the magnetron of the present embodiment has a magnetic circuit composed of a permanent magnet and a yoke formed by joining a first yoke and a second yoke.
  • the first yoke and the second yoke are joined by plastic deformation of the joint portion integrally provided on at least one of the first yoke and the second yoke.
  • 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 the exterior component excluding the core tube of the magnetron in accordance with the first embodiment.
  • FIG. 3 is a partially enlarged view of the magnetron according to the first embodiment before bending the claws of the input side frame-shaped yoke.
  • FIG. 4A is a partially enlarged view of the magnetron according to Embodiment 1, viewed from the outside, in which the claws of the input side frame-like yoke are bent.
  • FIG. 4B is a partially enlarged view of the magnetron according to Embodiment 1, viewed from the inside when the claws of the input side frame-shaped yoke are bent.
  • 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 the exterior component excluding the core tube of the magnetron in accordance with
  • FIG. 5 is a partially enlarged view of a yoke of a magnetron according to a second embodiment of the present disclosure.
  • FIG. 6 is a perspective view of a conventional magnetron.
  • FIG. 7 is a cross-sectional view of a core tube of a conventional magnetron.
  • FIG. 8 is a cross-sectional view of the exterior component excluding the core tube of the conventional magnetron.
  • the magnetron of the first aspect of the present disclosure has a magnetic circuit composed of a permanent magnet and a yoke formed by joining a first yoke and a second yoke.
  • the first yoke and the second yoke are joined by plastic deformation of the joint portion integrally provided on at least one of the first yoke and the second yoke.
  • the first yoke and the second yoke are joined by caulking.
  • the first yoke has a claw that is a joint.
  • the second yoke has a hole.
  • the claws are bent by caulking, and the claws engage with the holes.
  • the first yoke has a claw that is a joint.
  • the pawl has an engagement protrusion.
  • the second yoke has a hole and an engaging portion provided in the hole. The claw portion is bent by caulking, and the engagement protrusion engages with the engagement portion.
  • a fifth aspect of the present disclosure is a microwave heating apparatus provided with the magnetron of the first aspect.
  • 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 the exterior component 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 the claws of the input side frame-like yoke are bent.
  • FIG. 4A is a partially enlarged view of the magnetron according to the present embodiment, as viewed from the outside, in which the claws of the input side frame-shaped yoke are bent.
  • FIG. 4B is a partially enlarged view of the magnetron according to the present embodiment, as viewed from the inside, in which the claws of the input side frame-shaped yoke are bent.
  • the frame-shaped yoke 15 is arrange
  • the frame-shaped yokes 16 are arranged such that the cross section has an inverted U-shape.
  • the frame-shaped yoke 15 and the frame-shaped yoke 16 are arranged such that their ends overlap. In this state, by combining the frame-shaped yoke 15 and the frame-shaped yoke 16, a cylindrical frame-shaped yoke having a rectangular cross section is formed. In the present embodiment, the frame-shaped yokes 15 and 16 correspond to the first yoke and the second yoke, respectively.
  • a notch 151 is formed substantially at the center between the two ends of the frame-shaped yoke 15.
  • a projecting claw portion 201 is integrally formed with the frame-shaped yoke 15.
  • a hook-like engagement protrusion 202 is formed at the tip of the claw portion 201.
  • the claw portion 201 corresponds to a joint portion.
  • a hole 161 is formed substantially at the center of the two end portions of the frame-shaped yoke 16. As shown in FIGS. 4A and 4B, the hole portion 161 is provided to face the claw portion 201 of the frame-shaped yoke 15. Since the engaging portion 162 is formed in the hole 161, the hole 161 has a substantially L shape.
  • an annular permanent magnet 13 is placed at the inner central portion of the frame-shaped yoke 15 so as to surround the hole formed in the frame-shaped yoke 15.
  • the input side of the assembled core tube 19 is inserted into the annular permanent magnet 13 and the frame-shaped yoke 15.
  • the output side of the core tube 19 is inserted into the annular permanent magnet 14 and the frame-like yoke 16.
  • the claw portion 201 is bent by caulking at about 90 ° in the direction of the hole portion 161 and engaged with the peripheral portion of the hole portion 161.
  • the bending angle of the claw portion 201 is approximately 90 degrees. If the bending angle is 90 ° or more, the frame-shaped yokes 15, 16 are engaged reliably.
  • the frame-like joint is formed by plastic deformation (caulking) of the claw portion 201 (joint portion) integrally provided on at least one of the frame-like yoke 15 and the frame-like yoke 16.
  • the iron 15 and the frame-shaped yoke 16 are joined.
  • a hook-like engagement protrusion 202 is formed at the tip of the claw portion 201.
  • the engagement protrusion 202 has a so-called L shape.
  • the claw portion 201 may have a T shape.
  • two engaging portions 162 may be formed in the hole portion 161.
  • a rivet is hit on the overlapping portion of the frame-shaped yokes 15 and 16 to fix the frame-shaped yoke 15 and the frame-shaped yoke 16.
  • the present invention is not limited to this.
  • the frame-shaped yoke 15 and the frame-shaped yoke 16 may be fixed by a tapping screw.
  • the magnetron As described above, according to the present embodiment, it is possible to prevent the magnetron from being used by a method out of the manufacturer's guarantee, such as replacing the part with a non-genuine part. Thereby, unstable operation can be suppressed and shortening of the life can be prevented. As a result, it is possible to provide a reliable magnetron which can not be disassembled unless parts are destroyed.
  • Embodiment 2 of the present disclosure will be described.
  • the same or corresponding portions as in the first embodiment will be denoted by the same reference numerals, and overlapping descriptions will be omitted.
  • FIG. 5 is a partially enlarged view of the yoke of the magnetron according to the present embodiment.
  • the present embodiment is the same as the first embodiment in that the claws 203 are bent and engaged with the holes 163. However, the present embodiment is different from the first embodiment in the following points.
  • the engaging projection 202 is not provided in the claw portion 203, and the engaging portion 162 is not provided in the hole portion 163.
  • the claws 203 be bent by 90 ° or more and fixed.
  • the magnetron As described above, according to the present embodiment, it is possible to prevent the magnetron from being used by a method out of the manufacturer's guarantee, such as replacing the part with a non-genuine part. Thereby, unstable operation can be suppressed and shortening of the life can be prevented. As a result, it is possible to provide a reliable magnetron which can not be disassembled unless parts are destroyed.
  • the present disclosure is applicable to a magnetron.

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

Abstract

A magnetron according to an embodiment comprises a magnetic circuit configured from a permanent magnet (13, 14) and a yoke configured by joining a first yoke (15) and a second yoke (16) together. The first yoke (15) and the second yoke (16) are joined together by means of plastic deformation of a joint portion (201) with which at least one of the first yoke (15) and the second yoke (16) is integrally provided. According to the present embodiment, the magnetron can be prevented from being used by a method outside the scope of warranty by the manufacturer, such as replacing a component with a non-genuine component. In this way, unstable operations can be suppressed and a decrease in lifetime can be prevented. Accordingly, it is possible to provide a highly reliable magnetron that cannot be disassembled without destruction of components.

Description

マグネトロンとこれを備えたマイクロ波加熱装置Magnetron and microwave heating apparatus equipped with the same

　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 apparatus provided with the 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, when the structure of the magnetron, which is a microwave generator, is classified from the functional aspect, it is composed of a magnetic circuit unit, a cooling circuit unit, an LC filter circuit unit, and a core tube. 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 direct current energy applied between the anode part and the cathode part into high frequency energy through electronic motion in the working space between the anode and the cathode where the orthogonal electrostatic magnetic field is formed, and microwaves It is an electron tube that occurs. A magnetron is widely used as a microwave generator for a microwave heating apparatus such as an microwave oven, since the oscillation efficiency is relatively high and the output can be easily increased (for example, see 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 core tube of a conventional magnetron. FIG. 8 is a cross-sectional view of the exterior component excluding the core tube of the 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, the core tube 19 of a general magnetron is formed by vacuum sealing. A coiled filament 1 is disposed at the center of the cathode of the magnetron. The filament 1 is supported by the center lead 4 and the side leads 5. The center lead 4 is connected to the side lead 5 via an end hat 2 and an end hat 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 part of the magnetron comprises 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 vanes 7 are provided to keep a predetermined distance from the filament 1. A cavity resonator 8 is formed 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。 At both ends in the axial direction of the anode cylinder 6, a pair of bowl-shaped magnetic pole portions 9 and 10 having substantially the same shape are disposed to face each other. The input unit 12 is provided outside the end in the tube axis direction of the magnetic pole unit 9 and supplies the heating power and the high voltage for driving the magnetron to the filament 1. The output portion 11 is provided outside the end portion of the magnetic pole portion 10 in the tube axis direction, and radiates the microwave generated in the anode portion. The output unit 11 and the input unit 12 constitute 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 pole face of the pair of annular permanent magnets 13 and 14 is magnetically coupled to the pole parts 9 and 10. At the same time, the other magnetic pole faces of the pair of annular permanent magnets 13 and 14 are magnetically coupled to the frame-shaped yokes 15 and 16. Thus, a magnetic circuit is configured. The frame-shaped yokes 15, 16 are made of a ferromagnetic material and are combined in a rectangular shape in cross section.

　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 above-mentioned magnetron, the filament 1 is heated and electrons are emitted from the filament 1 toward the vane 7 by applying a predetermined high DC 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。 The electrons are subjected to the action of orthogonal electromagnetic fields in the electron motion space 17 between the filament 1 and the vane 7. The electrons orbit around the filament 1 and travel to the vane 7. The electrons interact with the weak microwaves of the 2,450 MHz band generated in the cavity resonator 8 in the divided vane 7 to generate large microwaves 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 microwaves generated in the cavity resonator 8 are transmitted by the antenna lead 18 electrically coupled to one of the vanes 7 and radiated into the heating chamber of the microwave oven through the output section 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 conventional configuration, parts other than the core tube 19 can be used semipermanently. Therefore, disassembly of the magnetron and replacement of the core tube 19 can be performed by a simple operation such as removal of the screw 21. Therefore, the magnetron may be used in a manner beyond the manufacturer's warranty, such as replacing the part with a non-genuine part. 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 aims to provide a reliable magnetron which can not be disassembled unless parts are destroyed.

　本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では、第１継鉄と第２継鉄との少なくとも一方に一体的に設けられた接合部の塑性変形により、第１継鉄と第２継鉄とが接合される。 The magnetron of the present embodiment has a magnetic circuit composed of a permanent magnet and a yoke formed by joining a first yoke and a second yoke. In the magnetron of this aspect, the first yoke and the second yoke are joined by plastic deformation of the joint portion integrally provided on at least one of the first yoke and the second yoke.

　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, it is possible to prevent the magnetron from being used in a manner out of the manufacturer's warranty, such as replacing parts with non-genuine parts. Thereby, unstable operation can be suppressed and shortening of the life can be prevented. As a result, it is possible to provide a reliable magnetron which can not be disassembled unless 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 the exterior component excluding the core tube of the magnetron in accordance with 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 claws of the input side frame-shaped yoke. 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 Embodiment 1, viewed from the outside, in which the claws of the input side frame-like yoke are bent. 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 Embodiment 1, viewed from the inside when the claws of the input side frame-shaped yoke are bent. 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 a yoke of a magnetron according to a 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 core tube of a conventional magnetron. 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 the exterior component excluding the core tube of the 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では、第１継鉄と第２継鉄との少なくとも一方に一体的に設けられた接合部の塑性変形により、第１継鉄と第２継鉄とが接合される。 The magnetron of the first aspect of the present disclosure has a magnetic circuit composed of a permanent magnet and a yoke formed by joining a first yoke and a second yoke. In the magnetron of this aspect, the first yoke and the second yoke are joined by plastic deformation of the joint portion integrally provided on at least one of the first yoke and the second yoke.

　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、第１継鉄と第２継鉄とがカシメにより接合される。 In the magnetron of the second aspect of the present disclosure, in addition to the first aspect, the first yoke and the second yoke are joined by caulking.

　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、第１継鉄が、接合部である爪部を有する。第２継鉄が孔部を有する。爪部がカシメにより折り曲げられ、爪部が孔部に係合する。 In the magnetron of the third aspect of the present disclosure, in addition to the first aspect, the first yoke has a claw that is a joint. The second yoke has a hole. The claws are bent by caulking, and the claws engage with the holes.

　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、第１継鉄が、接合部である爪部を有する。爪部が係合突起を有する。第２継鉄が、孔部と、孔部に設けられた係合部とを有する。爪部がカシメにより折り曲げられ、係合突起が係合部に係合する。 In the magnetron according to the fourth aspect of the present disclosure, in addition to the first aspect, the first yoke has a claw that is a joint. The pawl has an engagement protrusion. The second yoke has a hole and an engaging portion provided in the hole. The claw portion is bent by caulking, and the engagement protrusion engages with the engagement portion.

　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 apparatus 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 the exterior component 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 the claws of the input side frame-like yoke are bent.

　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, as viewed from the outside, in which the claws of the input side frame-shaped yoke are bent. FIG. 4B is a partially enlarged view of the magnetron according to the present embodiment, as viewed from the inside, in which the claws of the input side frame-shaped yoke are bent.

　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 to FIG. 1, FIG. 2, the frame-shaped yoke 15 is arrange | positioned so that a cross section may have a U-shape. The frame-shaped yokes 16 are arranged such 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 yoke 15 and the frame-shaped yoke 16 are arranged such that their ends overlap. In this state, by combining the frame-shaped yoke 15 and the frame-shaped yoke 16, a cylindrical frame-shaped yoke having a rectangular cross section is formed. In the present embodiment, the frame-shaped yokes 15 and 16 correspond to the first yoke and the second yoke, 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 substantially at the center between the two ends of the frame-shaped yoke 15. In the notch portion 151, a projecting claw portion 201 is integrally formed with the frame-shaped yoke 15. At the tip of the claw portion 201, a hook-like engagement protrusion 202 is formed. In the present embodiment, the claw portion 201 corresponds to a 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 161 is formed substantially at the center of the two end portions of the frame-shaped yoke 16. As shown in FIGS. 4A and 4B, the hole portion 161 is provided to face the claw portion 201 of the frame-shaped yoke 15. Since the engaging portion 162 is formed in the hole 161, the hole 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 at the inner central portion of the frame-shaped yoke 15 so as to surround the hole formed in the frame-shaped yoke 15. The input side of the assembled core tube 19 is inserted into the annular permanent magnet 13 and the frame-shaped yoke 15. The output side of the core tube 19 is inserted into the annular permanent magnet 14 and the frame-like yoke 16. When a frame-shaped yoke 15 and a frame-shaped yoke 16 are combined with each other by riveting the overlapping portions of the frame-shaped yokes 15 and 16, a cylindrical frame-shaped yoke having a rectangular 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 and engaged with the peripheral portion of the hole portion 161. When the claws 201 of the frame-shaped yoke 15 engage with the holes 161 of the frame-shaped yoke 16 and the frame-shaped yokes 15 and 16 are fixed, the magnetron can not 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 approximately 90 degrees. If the bending angle is 90 ° or more, the frame-shaped yokes 15, 16 are engaged reliably.

　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。 Thus, in the present embodiment, the frame-like joint is formed by plastic deformation (caulking) of the claw portion 201 (joint portion) integrally provided on at least one of the frame-like yoke 15 and the frame-like yoke 16. The iron 15 and the frame-shaped yoke 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-like engagement protrusion 202 is formed at the tip of the claw portion 201. The engagement protrusion 202 has a so-called L shape. However, the claw portion 201 may have a T shape. In this case, two engaging portions 162 may be 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, a rivet is hit on the overlapping portion of the frame-shaped yokes 15 and 16 to fix the frame-shaped yoke 15 and the frame-shaped yoke 16. However, the present invention is not limited to this. For example, the frame-shaped yoke 15 and the frame-shaped yoke 16 may be fixed by a tapping screw.

　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 out of the manufacturer's guarantee, such as replacing the part with a non-genuine part. Thereby, unstable operation can be suppressed and shortening of the life can be prevented. As a result, it is possible to provide a reliable magnetron which can not be disassembled unless 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。 Second Embodiment
Hereinafter, Embodiment 2 of the present disclosure will be described. In the following description, the same or corresponding portions as in the first embodiment will be denoted by the same reference numerals, and overlapping descriptions 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 yoke of the magnetron according to the present embodiment. The present embodiment is the same as the first embodiment in that the claws 203 are bent and engaged with the holes 163. However, the present embodiment is different 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 engaging projection 202 is not provided in the claw portion 203, and the engaging portion 162 is not provided in the hole portion 163. In the present embodiment, it is preferable that the claws 203 be 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 out of the manufacturer's guarantee, such as replacing the part with a non-genuine part. Thereby, unstable operation can be suppressed and shortening of the life can be prevented. As a result, it is possible to provide a reliable magnetron which can not be disassembled unless 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 a magnetron.

　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 DESCRIPTION OF SYMBOLS 1 filament 2, 3 end hat 4 center lead 5 side lead 6 anode cylinder 7 bain 8 cavity resonator 9, 10 magnetic pole part 11 output part 12 input part 13, 14 annular permanent magnet 15, 16 frame-like yoke 17 electronic motion Space 18 antenna lead 19 core tube 21 screw 151 notches 161 and 163 holes 162 engaging portions 201 and 203 claws 202 engaging protrusions

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において、
　前記第１継鉄と前記第２継鉄との少なくとも一方に一体的に設けられた接合部の塑性変形により、前記第１継鉄と前記第２継鉄とが接合された、マグネトロン。 In a magnetron having a magnetic circuit comprising a permanent magnet and a yoke constructed by joining a first yoke and a second yoke,
A magnetron, wherein the first yoke and the second yoke are joined by plastic deformation of a joint integrally provided on at least one of the first yoke and the second yoke. 　前記第１継鉄と前記第２継鉄とがカシメにより接合された、請求項１に記載のマグネトロン。 The magnetron according to claim 1, wherein the first yoke and the second yoke are joined by caulking. 　前記第１継鉄が、前記接合部である爪部を有し、
　前記第２継鉄が孔部を有し、
　前記爪部がカシメにより折り曲げられ、前記爪部が前記孔部に係合する、請求項１に記載のマグネトロン。 The first yoke has a claw portion which is the joint portion,
The second yoke has a hole,
The magnetron according to claim 1, wherein the claws are bent by caulking and the claws engage with the holes. 　前記第１継鉄が、前記接合部である爪部を有し、
　前記爪部が係合突起を有し、
　前記第２継鉄が、孔部と、前記孔部に設けられた係合部とを有し、
　前記爪部がカシメにより折り曲げられ、前記係合突起が前記係合部に係合する、請求項１に記載のマグネトロン。 The first yoke has a claw portion which is the joint portion,
The claw portion has an engagement protrusion;
The second yoke includes a hole and an engagement portion provided in the hole;
The magnetron according to claim 1, wherein the claw portion is bent by caulking, and the engagement protrusion engages with the engagement portion. 　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。 A microwave heating apparatus comprising the magnetron according to claim 1.
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