JPH0815051B2 - Magnetron equipment - Google Patents
Magnetron equipmentInfo
- Publication number
- JPH0815051B2 JPH0815051B2 JP1471187A JP1471187A JPH0815051B2 JP H0815051 B2 JPH0815051 B2 JP H0815051B2 JP 1471187 A JP1471187 A JP 1471187A JP 1471187 A JP1471187 A JP 1471187A JP H0815051 B2 JPH0815051 B2 JP H0815051B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetron
- yoke plate
- magnetic pole
- sealing tube
- waveguide
- 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
Links
Landscapes
- Control Of High-Frequency Heating Circuits (AREA)
- Microwave Tubes (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、電子レンジ等の高周波加熱機器に用いられ
るマグネトロン装置、とくに、永久磁石を含む外部磁気
回路をマグネトロンに一体的に結合してなる内磁型のマ
グネトロン装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetron device used for high-frequency heating equipment such as a microwave oven, and in particular, an inner magnet integrally formed with an external magnetic circuit including a permanent magnet. Type magnetron device.
従来の技術 一般に、電子レンジ等に用いられる内磁型のマグネト
ロン装置は、第３図に示すように構成され、マグネトロ
ン１の陽極を形成する陽極筒体２は、その出力側の開口
端縁に金属製はと目状の封着管３を封着してなり、この
封着管３の先端部に金属製の排気管４が、セラミックか
らなる絶縁環５を介して突設されている。そして、陽極
筒体２の内面に設けられた陽極ベイン６から延び出たマ
イクロ波導出用導体７の先端部が、排気管４のピンチオ
フ部に挟持されており、排気管４に嵌着された金属製帽
体８がマイクロ波放出端子となる。また、陽極筒体２の
入力側の開口端縁に封着された金属製はと目状の封着管
９には、陰極端子導出用ステム10が封着されており、封
着管３のフランジ部3aの外面上に同軸的に設けられたフ
ェライト製円環状の永久磁石11は、封着管９のフランジ
部9aの外面上に同軸的に設けられたいま一つのフェライ
ト製円環状の永久磁石12および枠状継鉄13とともに、マ
グネトロン励磁用の外部磁気回路を形成している。な
お、封着管３のフランジ部3aは第１の磁極片14を覆って
おり、第１の磁極片14に向き合う第２の磁極片15は、封
着管９のフランジ部9aによって覆われている。2. Description of the Related Art In general, an inner magnet type magnetron device used in a microwave oven or the like is configured as shown in FIG. 3, and an anode cylinder 2 forming an anode of the magnetron 1 has an opening end on the output side thereof. A metal eyelet-shaped sealing tube 3 is sealed, and a metal exhaust tube 4 is projectingly provided at a tip portion of the sealing tube 3 via an insulating ring 5 made of ceramic. The tip of the microwave lead-out conductor 7 extending from the anode vane 6 provided on the inner surface of the anode cylinder 2 is sandwiched between the pinch-off portions of the exhaust pipe 4 and fitted into the exhaust pipe 4. The metal cap body 8 serves as a microwave emission terminal. In addition, the metal dovetail-shaped sealing tube 9 sealed at the input side opening edge of the anode cylinder 2 has the cathode terminal lead-out stem 10 sealed therein. The ferrite annular permanent magnet 11 coaxially provided on the outer surface of the flange portion 3a is another ferrite annular permanent magnet coaxially provided on the outer surface of the flange portion 9a of the sealing tube 9. The magnet 12 and the frame yoke 13 form an external magnetic circuit for magnetron excitation. The flange portion 3a of the sealing tube 3 covers the first magnetic pole piece 14, and the second magnetic pole piece 15 facing the first magnetic pole piece 14 is covered by the flange portion 9a of the sealing tube 9. There is.
枠状継鉄13は、平板状の継鉄板16と、その折り曲げタ
ブ部にねじ17を用いて結合された断面Ｕ字状の継鉄板18
とからなる断面ロ字状のもので、継鉄板16に穿設された
通孔16a内に嵌め込まれた円環状のガスケット19は金属
細線の編組体からなる。また、継鉄板18の底部にとりつ
けられた金属製のシールドケース20は、継鉄板18の底部
に穿設された通孔18aを貫通する封着管９の外周面に接
するエッジ付きの通孔を有し、ステム10およびその端子
ピンに接続された図外のLCフィルタ回路用チョークコイ
ル等を収容している。The frame-shaped yoke 13 includes a plate-shaped yoke plate 16 and a yoke plate 18 having a U-shaped cross section, which is connected to the bent tab portion thereof with a screw 17.
An annular gasket 19 having a square cross-section consisting of and fitted in a through hole 16a formed in the yoke plate 16 is made of a braided metal wire. Further, the metal shield case 20 attached to the bottom of the yoke plate 18 has a through hole with an edge that is in contact with the outer peripheral surface of the sealing tube 9 that penetrates the through hole 18a formed in the bottom of the yoke plate 18. It has a stem 10 and an LC filter circuit choke coil (not shown) connected to the terminal pin of the stem 10.
21は陰極、22は陽極筒体２の外周面に多段にとりつけ
られた多数の放熱フィン、23は電子レンジ等の加熱室に
連通する導波管で、その底面部に設けられた通孔の筒状
エッジ部23aがガスケット19の上面に圧接することによ
って、帽体８から放出されたマイクロ波が漏れなく前記
加熱室内に送りこまれるようになっている。24はマグネ
トロン装置とり付け用のねじを示す。Reference numeral 21 is a cathode, 22 is a large number of radiating fins mounted in multiple stages on the outer peripheral surface of the anode cylinder 2, and 23 is a waveguide communicating with a heating chamber such as a microwave oven. By pressing the cylindrical edge portion 23a against the upper surface of the gasket 19, the microwaves emitted from the cap body 8 are sent into the heating chamber without leaking. Reference numeral 24 indicates a screw for attaching the magnetron device.
発明が解決しようとする問題点 このような従来の構成によると、マグネトロンおよび
その外部磁気回路からなるマグネトロン装置が、導波管
に対して前述のようなガスケットを介して結合されるた
め、この結合部を通じて出力マイクロ波が装置外へ漏出
することはない。しかし、そのためには導波管の底板部
に形成された通孔の筒状エッジ部が円環状ガスケットの
上面に同軸的に位置し、かつ均等に圧接していなればな
らない。ところが実際には、電子レンジ等のセット内に
あらかじめ組み込まれている導波管に対してマグネトロ
ン装置をねじ止めによりとり付けることもあって、両者
間に位置ずれや傾斜を生じやすい。そして、これがマイ
クロ波の漏洩につながったり、出力インピーダンス特性
に少なからぬ影響を与えるという問題点があった。ま
た、長期間にわたる使用により、ガスケットに変形や劣
化を生じやすいという問題点もあった。Problems to be Solved by the Invention According to such a conventional configuration, the magnetron device including the magnetron and its external magnetic circuit is coupled to the waveguide through the gasket as described above. The output microwave does not leak out of the device through the section. However, for that purpose, the cylindrical edge portion of the through hole formed in the bottom plate portion of the waveguide must be coaxially positioned on the upper surface of the annular gasket and uniformly pressed against it. However, in practice, the magnetron device may be attached to the waveguide built in the set of a microwave oven or the like in advance by screwing, so that a positional shift or an inclination is likely to occur between the two. Then, there are problems that this leads to leakage of microwaves and has a considerable influence on the output impedance characteristic. In addition, there is a problem that the gasket is likely to be deformed or deteriorated after long-term use.
さらに、マグネトロンの小型化がすすむに伴い、枠状
継鉄および放熱フィンも小型となり、動作時における陽
極筒体および永久磁石の温度上昇を十分に抑制しきれ
ず、永久磁石の保磁力を温度上昇により減退させやすい
という問題点もあった。Furthermore, as the magnetron becomes smaller, the frame-shaped yoke and heat dissipation fins also become smaller, and it is not possible to sufficiently suppress the temperature rise of the anode cylinder and the permanent magnet during operation. There was also a problem that it was easy to decrease.
問題点を解決するための手段 本発明は、前述のような種々の問題点を解決すべくな
されたもので、本発明によると、陽極筒体の出力側開口
端縁に封着された封着管の筒状部を継鉄板の通孔に嵌入
せしめるとともに、この継鉄板を用いてマグネトロンの
出力部に対する導波管を形成せしめる。Means for Solving the Problems The present invention has been made to solve the above-mentioned various problems, and according to the present invention, a sealing member is sealed at the output side opening end edge of the anode cylinder. The tubular portion of the tube is fitted into the through hole of the yoke plate, and the yoke plate is used to form a waveguide for the output part of the magnetron.
作用 このように構成すると、前記継鉄板が外部磁気回路部
材としてのみならず、導波管部材をも兼ねるので、それ
だけ使用材料の節減ができるほか、マグネトロンの出力
部と導波管との二者間にガスケットを介在させる必要が
なくなる。そのうえ、前記二者が常に所定の位置関係を
保って一体に結合されるため、ここにセンターずれを生
じることによる前述のような弊害をなくすことができ
る。さらには、前記継鉄板を含む枠状継鉄が大熱容量の
導波管と一体化されることにより放熱効果を高め得、永
久磁石の温度上昇による保磁力減退を抑制せしめること
ができる。With this structure, the yoke plate serves not only as an external magnetic circuit member but also as a waveguide member, so that it is possible to reduce the amount of material used, and the magnetron output section and the waveguide are combined. There is no need to interpose a gasket between them. In addition, since the two members are always joined together while maintaining a predetermined positional relationship, it is possible to eliminate the above-mentioned harmful effects caused by the center deviation. Furthermore, since the frame-shaped yoke including the yoke plate is integrated with the large heat capacity waveguide, the heat dissipation effect can be enhanced, and the coercive force decline due to the temperature rise of the permanent magnet can be suppressed.
実施例 つぎに、本発明を図面に示した実施例とともに詳しく
説明する。EXAMPLES Next, the present invention will be described in detail with reference to the examples shown in the drawings.
第１図および第２図に示した本発明実施のマグネトロ
ン装置は、第３図に示した従来のマグネトロン装置にお
けると同様のマグネトロン１、永久磁石11,12、シール
ドケース20および放熱フィン22を有しており、これらに
は同一の符号が付してある。ただ、環状永久磁石11,12
とともに外部磁気回路を構成する鉄または鉄合金製の枠
状継鉄25が、比較的長大な平板状の第１継鉄板26と、こ
れとは位置27で溶接またはろう付けされた断面Ｕ字状の
第２継鉄板28とからなる点と、第１継鉄板26に形成され
ている返り付きの通孔26aが比較的径小の口径を有して
いて、マグネトロン１の陽極筒体２の出力側開口端縁に
封着された金属製はと目状の封着管３が、通孔26aに嵌
入している点と、第１継鉄板26が導波管29の底板部を形
成している点とにおいて従来の構成と異なる。なお、か
かるマグネトロン装置は、電子レンジの加熱室壁部30に
締め付けねじ31を用いてとり付けられている。The magnetron device of the present invention shown in FIGS. 1 and 2 has a magnetron 1, permanent magnets 11 and 12, a shield case 20 and a radiation fin 22 similar to those in the conventional magnetron device shown in FIG. The same reference numerals are given to them. However, annular permanent magnets 11,12
A frame-shaped yoke 25 made of iron or an iron alloy that constitutes an external magnetic circuit together with a relatively long flat plate-shaped first yoke plate 26 is welded or brazed at a position 27 with the U-shaped cross section. Of the anode cylinder 2 of the magnetron 1 having a relatively small diameter through the return hole 26a formed in the first yoke plate 26 and the second yoke plate 28 of the magnetron 1. The metal eyelet-shaped sealing tube 3 sealed to the side opening edge is fitted in the through hole 26a, and the first yoke plate 26 forms the bottom plate portion of the waveguide 29. This is different from the conventional configuration. The magnetron device is attached to the heating chamber wall portion 30 of the microwave oven by using the tightening screw 31.
上述の実施例では、第１継鉄板26を単一の平板で形成
したが、右半部で重ね合わされた長・短二枚の平板でも
って第１継鉄板を形成し、長大な方の左半部を加熱室壁
部30側へ突出させてもよい。また、第１継鉄板26でもっ
て導波管29の底板部のすべてを形成する要はないし、底
板部および側板部を併せ形成してもよい。In the above-described embodiment, the first yoke plate 26 is formed by a single flat plate, but the first yoke plate is formed by two long and short flat plates that are overlapped in the right half, and the longer left side is formed. You may make a half part protrude to the heating chamber wall part 30 side. Further, it is not necessary to form all of the bottom plate portion of the waveguide 29 with the first yoke plate 26, and the bottom plate portion and the side plate portion may be formed together.
発明の効果 本発明は前述のように構成されるので、第１継鉄板が
外部磁気回路部材と導波管部材とを兼ね、しかも、ガス
ケットを省略できることから、製造コストの低減をはか
ることができる。また、マグネトロンの出力部と導波管
との結合部に両者のセンターずれを生じることがなくな
り、前記結合部におけるマイクロ波の漏洩や出力インピ
ーダンスの不整合などを防止することができる。また、
装置の動作時のマグネトロンの温度上昇を、放熱フィン
および枠状継鉄のみならず、導波管によっても抑え得る
ことから、永久磁石の温度上昇に伴う保磁力減退を防止
することができる。EFFECTS OF THE INVENTION Since the present invention is configured as described above, the first yoke plate serves as both the external magnetic circuit member and the waveguide member, and since the gasket can be omitted, the manufacturing cost can be reduced. . Further, the center of the output part of the magnetron and the waveguide are not displaced from each other in the coupling part, and it is possible to prevent microwave leakage and output impedance mismatch in the coupling part. Also,
Since the temperature rise of the magnetron during the operation of the device can be suppressed not only by the radiation fins and the frame yoke but also by the waveguide, it is possible to prevent the coercive force from declining with the temperature rise of the permanent magnets.
第１図および第２図は本発明を実施したマグネトロン装
置の一部破断側面図および斜視図、第３図は従来のマグ
ネトロン装置の一部破断側面図である。 １……マグネトロン、２……陽極筒体、３……封着管、
11,12……永久磁石、25……枠状継鉄、26……第１継鉄
板、28……第２継鉄板、29……導波管。1 and 2 are partially cutaway side views and perspective views of a magnetron device embodying the present invention, and FIG. 3 is a partially cutaway side view of a conventional magnetron device. 1 ... Magnetron, 2 ... Anode cylinder, 3 ... Sealing tube,
11,12 ...... Permanent magnet, 25 ...... Frame yoke, 26 ...... First yoke plate, 28 ...... Second yoke plate, 29 ...... Waveguide.
Claims (1)
に封着された金属製はと目状封着管のフランジ部上に、
この封着管の筒状部を包囲する環状永久磁石を同軸的に
積み重ね、同永久磁石の一方の磁極を前記マグネトロン
の一方の磁極片に磁気的に結合せしめる一方、前記永久
磁石上に積み重ねられた継鉄板を含む枠磁継鉄により前
記永久磁石の他方の磁極を前記マグネトロンの他方の磁
極片に磁気的に結合せしめてなるマグネトロン装置にお
いて、前記封着管の筒状部を前記継鉄板の通孔に嵌入せ
しめるとともに、前記継鉄板を用いて前記マグネトロン
の出力部に対する導波管を形成せしめたことを特徴とす
るマグネトロン装置。Claim: What is claimed is: 1. On the flange portion of the metal eyelet-shaped sealing tube, which is sealed at the output side opening edge of the anode cylinder of the magnetron,
The annular permanent magnets surrounding the tubular portion of the sealing tube are coaxially stacked, and one magnetic pole of the permanent magnet is magnetically coupled to one magnetic pole piece of the magnetron, while being stacked on the permanent magnet. In a magnetron device in which the other magnetic pole of the permanent magnet is magnetically coupled to the other magnetic pole piece of the magnetron by a frame magnetized iron plate including a yoke plate, the tubular portion of the sealing tube is formed of the yoke plate. A magnetron device characterized in that it is fitted in a through hole and a waveguide is formed for the output part of the magnetron by using the yoke plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1471187A JPH0815051B2 (en) | 1987-01-23 | 1987-01-23 | Magnetron equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1471187A JPH0815051B2 (en) | 1987-01-23 | 1987-01-23 | Magnetron equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63181240A JPS63181240A (en) | 1988-07-26 |
| JPH0815051B2 true JPH0815051B2 (en) | 1996-02-14 |
Family
ID=11868738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1471187A Expired - Lifetime JPH0815051B2 (en) | 1987-01-23 | 1987-01-23 | Magnetron equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0815051B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5201711B2 (en) * | 2007-08-08 | 2013-06-05 | パナソニック株式会社 | Magnetron |
-
1987
- 1987-01-23 JP JP1471187A patent/JPH0815051B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63181240A (en) | 1988-07-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |