JPH06103887A - Method for assembling magnetron - Google Patents
Method for assembling magnetronInfo
- Publication number
- JPH06103887A JPH06103887A JP4247799A JP24779992A JPH06103887A JP H06103887 A JPH06103887 A JP H06103887A JP 4247799 A JP4247799 A JP 4247799A JP 24779992 A JP24779992 A JP 24779992A JP H06103887 A JPH06103887 A JP H06103887A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- yoke
- gasket
- ring
- magnetron
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、マグネトロンの組立
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a magnetron.
【０００２】[0002]
【従来の技術】従来、電子レンジ用マグネトロンは図４
〜図６に示すように構成され、発振部本体１の外周に複
数の冷却フィン２が取付けられている。この発振部本体
１の軸方向の両端には、それぞれ筒状金属容器９を介し
て入力部（図示せず）と出力部１０とが突設されてい
る。そして、各筒状金属容器９の周囲にはリング状永久
磁石３が配設されている。この永久磁石３に磁気的に接
続されて磁気回路を構成し、発振部本体１，冷却フィン
２，筒状金属容器９，永久磁石３等を取囲むように強磁
性体製の上部ヨ−ク５と下部ヨ−ク４とが配設されてい
る。このヨ−ク５，４は図示のように通常２つの部分に
分かれており、上記の各部材を組上げた後、上下の矢印
方向に所定の力で押付け、ねじ止めやかしめ等で上下の
各ヨ−ク５，４を固定している。2. Description of the Related Art A conventional magnetron for a microwave oven is shown in FIG.
~ As shown in FIG. 6, a plurality of cooling fins 2 are attached to the outer circumference of the oscillator body 1. An input section (not shown) and an output section 10 are provided at both ends in the axial direction of the oscillator main body 1 with a cylindrical metal container 9 interposed therebetween. A ring-shaped permanent magnet 3 is arranged around each cylindrical metal container 9. An upper yoke made of a ferromagnetic material is magnetically connected to the permanent magnet 3 to form a magnetic circuit, and surrounds the oscillator main body 1, the cooling fins 2, the cylindrical metal container 9, the permanent magnet 3 and the like. 5 and a lower yoke 4 are provided. As shown in the drawing, the yokes 5 and 4 are usually divided into two parts. After the above members are assembled, they are pressed with a predetermined force in the direction of the up and down arrows, and the upper and lower parts are fixed by screwing or caulking. The yokes 5 and 4 are fixed.
【０００３】この場合、出力部側においては筒状金属容
器９に接して金属製のガスケット受リング６が設けら
れ、このガスケット受リング６と上部ヨ−ク５の中央開
口部５ａとの間に、リング状導電体ガスケット７が設け
られ、ガスケット受リング６により保持されている。
尚、ガスケット７は、マグネトロンの出力部１０と電子
レンジのオ−ブンとの電気的結合を保つもので、通常は
真鍮やステンレスの細線を編んで作られている。In this case, on the output side, a metal gasket receiving ring 6 is provided in contact with the cylindrical metal container 9, and between the gasket receiving ring 6 and the central opening 5a of the upper yoke 5. A ring-shaped conductor gasket 7 is provided and held by the gasket receiving ring 6.
The gasket 7 keeps electrical connection between the output part 10 of the magnetron and the oven of the microwave oven, and is usually made by braiding fine wires of brass or stainless steel.
【０００４】図７に示すように、オ−ブン側には、ガス
ケット７の径と合ったリッジ部１１を持つ取付け孔１２
があり、ガスケット７に押付けて電気的接触を完全にす
る。しかし、このリッジ部１１の径が小さくて、ガスケ
ット７の内径に略等しい場合は、リッジ部１１のガスケ
ット７への食い込みと共にガスケット７内径部が変形
し、極端な場合、ガスケット受リング６との間に隙間が
生じるようになる。隙間が生じると、この隙間から高周
波電流が漏れる。又、放電が生じ、この発熱のためマグ
ネトロンの気密性が破られる恐れがある。これを防止す
るために、従来はガスケット７の下にガスケット受リン
グ６と接触させるべく、金属スペ−サを設けている。As shown in FIG. 7, a mounting hole 12 having a ridge portion 11 matching the diameter of the gasket 7 is provided on the oven side.
And presses against gasket 7 to complete electrical contact. However, when the diameter of the ridge portion 11 is small and is substantially equal to the inner diameter of the gasket 7, the inner diameter portion of the gasket 7 is deformed as the ridge portion 11 bites into the gasket 7, and in extreme cases, it may interfere with the gasket receiving ring 6. There will be a gap between them. When a gap is created, high frequency current leaks from this gap. Further, a discharge is generated, and this heat generation may damage the airtightness of the magnetron. In order to prevent this, conventionally, a metal spacer is provided below the gasket 7 to make contact with the gasket receiving ring 6.
【０００５】即ち、図４の場合は、ガスケット７と永久
磁石３との間に、ステンレス製の中央孔にフィンガ−を
有する金属スペ−サ１３を圧入嵌合させている。ステン
レスを用いるのは、耐熱性とクッション性を持たせるた
めである。又、図５の場合は、磁性体製の金属スペ−サ
１４を単に挾んだ構造である。強磁性体を使う理由は、
金属スペ−サ１４により磁気抵抗を小さくするためであ
る。又、図６の場合は、図５の金属スペ−サ１４の上に
更にステンレス製の金属スペ−サ１３を圧入嵌合させた
もので、図４および図５の構造の欠陥を補っている。That is, in the case of FIG. 4, a metal spacer 13 having a finger in a central hole made of stainless steel is press-fitted between the gasket 7 and the permanent magnet 3. The reason for using stainless steel is that it has heat resistance and cushioning properties. In the case of FIG. 5, the metal spacer 14 made of magnetic material is simply sandwiched. The reason for using ferromagnetic materials is
This is because the magnetic resistance is reduced by the metal spacer 14. In the case of FIG. 6, a metal spacer 13 made of stainless steel is further press-fitted onto the metal spacer 14 of FIG. 5 to compensate for the defects of the structures of FIGS. 4 and 5. .
【０００６】[0006]
【発明が解決しようとする課題】ところが上記従来の構
造では、図４の場合は、金属スペ−サ１３の材質がステ
ンレスのため耐熱性および鉛の防止、クッション性は良
好で信頼性もある。しかし、非磁性体のため、磁気回路
の永久磁石３面上部を欠くことになり、磁気抵抗が増
し、永久磁石３の磁気効率が低下する。又、値段も高
い。更に、図５の場合は、鉄等の強磁性体製の金属スペ
−サ１４で中央孔は単純な孔のため、接触が悪い。中央
孔に図４のようにフィンガ−を設ける方法は、耐熱性に
問題がある。図６の場合は、図４と図５を重ねたもの
で、信頼性，磁気効率的には完全であるが、２重のため
に構造が複雑で部品点数が多く、組立て性に問題があ
る。この発明は、以上のような不都合を解決するもので
あり、構造の簡略化と低廉化を図ったマグネトロンの組
立方法を提供することを目的とする。However, in the above-mentioned conventional structure, in the case of FIG. 4, the metal spacer 13 is made of stainless steel, so that the heat resistance and the prevention of lead and the cushioning property are good and reliable. However, since it is a non-magnetic material, the upper part of the surface of the permanent magnet 3 of the magnetic circuit is omitted, the magnetic resistance increases, and the magnetic efficiency of the permanent magnet 3 decreases. Also, the price is high. Further, in the case of FIG. 5, the contact is poor because the central hole is a simple hole in the metal spacer 14 made of a ferromagnetic material such as iron. The method of providing the finger in the central hole as shown in FIG. 4 has a problem in heat resistance. In the case of FIG. 6, it is a superposition of FIG. 4 and FIG. 5, which is complete in terms of reliability and magnetic efficiency, but the structure is complicated and the number of parts is large due to the double structure, and there is a problem in assembling. . SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned inconveniences, and an object thereof is to provide a magnetron assembling method with a simplified structure and low cost.
【０００７】[0007]
【課題を解決するための手段】この発明は、発振部本体
の一端に筒状金属容器を介して出力部を突設し、金属容
器の周囲にリング状永久磁石を設け、この永久磁石，発
振部本体等を取囲むようにヨ−クを配設し、このヨ−ク
の中央開口部にリング状導電ガスケットを設け、更にこ
のガスケットおよびヨ−クと永久磁石との間にリング状
金属スペ−サを挾む場合、金属スペ−サの開口近傍を予
め折曲げておき、この金属スペ−サをガスケットおよび
ヨ−クと永久磁石との間に挾んでヨ−クを締付け、折曲
げ部を水平状態に近づけて出力部の導電体壁に近接又は
密接させるマグネトロンの組立方法である。SUMMARY OF THE INVENTION According to the present invention, an output portion is provided to project from one end of an oscillator body through a cylindrical metal container, and a ring-shaped permanent magnet is provided around the metal container. A yoke is arranged so as to surround the main body of the section, a ring-shaped conductive gasket is provided in the center opening of the yoke, and a ring-shaped metal space is provided between the gasket and the yoke and the permanent magnet. -When sandwiching the solder, bend the vicinity of the opening of the metal spacer in advance and sandwich this metal spacer between the gasket and the yoke and the permanent magnet to tighten the yoke, and bend the bent portion. Is a method of assembling the magnetron, which is brought close to a horizontal state to be close to or in close contact with the conductor wall of the output section.
【０００８】[0008]
【作用】この発明によれば、組立て時は金属スペ−サの
中央孔の孔径が大きいので、出力部挿入の際に変形する
恐れがない。又、組立て後は、金属スペ−サはヨ−クと
永久磁石で挾まれ、発振部本体の発振と共に温度が上昇
すると、発振部本体の膨脹で一層押付け力が強まり、ガ
スケット受リングとの接触が強まる。According to the present invention, since the diameter of the central hole of the metal spacer is large at the time of assembly, there is no fear of deformation when the output portion is inserted. After assembly, the metal spacer is sandwiched between the yoke and the permanent magnet, and when the temperature rises as the oscillator body oscillates, the oscillator body expands, further increasing the pressing force and making contact with the gasket receiving ring. Becomes stronger.
【０００９】[0009]
【実施例】以下、図面を参照して、この発明の一実施例
を詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.
【００１０】この発明の組立方法により組立てられた電
子レンジ用マグネトロンは、図１に示すように構成さ
れ、従来例（図４〜図６）と同一箇所は同一符号を付す
ことにする。The magnetron for a microwave oven assembled by the assembling method of the present invention is constructed as shown in FIG. 1, and the same parts as those in the conventional example (FIGS. 4 to 6) are designated by the same reference numerals.
【００１１】即ち、発振部本体１の外周には複数の冷却
フィン２が取付けられている。この発振部本体１の軸方
向の両端には、それぞれ筒状金属容器９を介して入力部
（図示せず）と出力部１０とが突設されている。そし
て、各筒状金属容器９の周囲にはリング状永久磁石３が
配設されている。この永久磁石３に磁気的に接続されて
磁気回路を構成し、発振部本体１，冷却フィン２，筒状
金属容器９，永久磁石３等を取囲むように強磁性体製の
上部ヨ−ク５と下部ヨ−ク４とが配設されている。 更
に、上部ヨ−ク５の中央開口部５ａには、リング状のガ
スケット７が圧入嵌合され、金属導電体製のガスケット
受リング６により保持されている。このガスケット受リ
ング６は、出力部の一部を構成し金属容器９内に延びる
高調波チョ−ク用金属円筒（図では見えない）の先端部
である。That is, a plurality of cooling fins 2 are attached to the outer periphery of the oscillator body 1. An input section (not shown) and an output section 10 are provided at both ends in the axial direction of the oscillator main body 1 with a cylindrical metal container 9 interposed therebetween. A ring-shaped permanent magnet 3 is arranged around each cylindrical metal container 9. An upper yoke made of a ferromagnetic material is magnetically connected to the permanent magnet 3 to form a magnetic circuit, and surrounds the oscillator body 1, the cooling fins 2, the cylindrical metal container 9, the permanent magnet 3 and the like. 5 and a lower yoke 4 are provided. Further, a ring-shaped gasket 7 is press-fitted into the central opening 5a of the upper yoke 5 and held by a gasket receiving ring 6 made of a metal conductor. The gasket receiving ring 6 is a tip portion of a metal cylinder (not visible in the figure) for a harmonic choke which constitutes a part of the output portion and extends into the metal container 9.
【００１２】そして、ガスケット７と永久磁石３との間
には、鉄等の強磁性体製の金属スペ−サ１５が配設され
ている。この金属スペ−サ１５は図２および図３から明
らかなように、リング状にして中央孔には複数のフィン
ガ−１５ａが形成され、且つ永久磁石３の内径より大き
い径の箇所Ｂから永久磁石３方向へ折曲げられている。
具体的には、金属スペ−サ１５はその内径が組み立て前
の自然状態ではガスケット受リング６の外径より０．２
〜０．３ｍｍ大きく、組み立て後に上部ヨ−ク５と永久
磁石３とで挾まれ押し付けられた時、折曲げ部が水平状
態に近づき、その内径がガスケット受リング６の外径よ
りも０．１ｍｍ程小さくなるように設定されている。組
立て時には、金属スペ−サ１５をガスケット７および上
部ヨ−ク５との間に挾んで、矢印で示す上下方向の力で
上部ヨ−ク５を締付ける。すると、金属スペ−サ１５の
折曲げ部であるフィンガ−１５ａが矢印方向へ変形し、
水平状態又はそれに近づくようになって出力部即ちガス
ケット受リング６に近接又は密接する。この時、空隙１
６はなくなる。A metal spacer 15 made of a ferromagnetic material such as iron is disposed between the gasket 7 and the permanent magnet 3. As is apparent from FIGS. 2 and 3, the metal spacer 15 is formed in a ring shape and a plurality of fingers 15a are formed in the central hole, and the permanent magnet is formed from a portion B having a diameter larger than the inner diameter of the permanent magnet 3. It is bent in 3 directions.
Specifically, the metal spacer 15 has an inner diameter of 0.2 from the outer diameter of the gasket receiving ring 6 in a natural state before assembly.
~ 0.3mm larger, when folded and pressed by the upper yoke 5 and the permanent magnet 3 after assembly, the bent portion approaches a horizontal state, and the inner diameter is 0.1mm larger than the outer diameter of the gasket receiving ring 6. It is set to be small. At the time of assembly, the metal spacer 15 is sandwiched between the gasket 7 and the upper yoke 5, and the upper yoke 5 is tightened by the vertical force indicated by the arrow. Then, the finger 15a, which is the bent portion of the metal spacer 15, is deformed in the arrow direction,
When it comes to or near the horizontal state, it comes close to or close to the output portion, that is, the gasket receiving ring 6. At this time, void 1
6 is gone.
【００１３】この結果、組立て時は金属スペ−サ１５の
中央孔の孔径が大きいので、出力部１０挿入の際に変形
する恐れがない。又、組立て後は、金属スペ−サ１５は
ヨ−ク５と永久磁石３で挾まれ、発振部本体１の発振と
共に温度が上昇すると、発振部本体１の膨脹で一層押付
け力が強まり、ガスケット受リング６との接触が強ま
る。As a result, since the hole diameter of the central hole of the metal spacer 15 is large at the time of assembly, there is no risk of deformation when the output portion 10 is inserted. After assembly, the metal spacer 15 is sandwiched by the yoke 5 and the permanent magnet 3, and when the temperature rises as the oscillation body 1 oscillates, the oscillating body 1 expands to further increase the pressing force. The contact with the receiving ring 6 is strengthened.
【００１４】[0014]
【発明の効果】この発明によれば、ガスケットおよびヨ
−クと永久磁石との間に挾まれた金属スペ−サの開口近
傍を予め折曲げておき、この金属スペ−サをガスケット
およびヨ−クと永久磁石との間に挾んでヨ−クを締付
け、折曲げ部を水平状態に近づけて出力部に近接又は密
接させているので、磁気効率の低下もなく、動作中もガ
スケット受リングとの電気的接触も良好な組立て性が得
られ、部品点数も少なくいマグネトロンを提供出来る。According to the present invention, the vicinity of the opening of the metal spacer sandwiched between the gasket and the yoke and the permanent magnet is bent in advance, and the metal spacer is inserted into the gasket and the yoke. The yoke is clamped between the magnet and the permanent magnet to tighten the yoke, and the bent portion is brought close to the horizontal state to be close to or in close contact with the output portion. It is possible to provide a magnetron with good electrical assembling ability and a small number of parts.
【図１】この発明の一実施例に係るマグネトロンの組立
方法を示す縦断面図。FIG. 1 is a vertical sectional view showing a method of assembling a magnetron according to an embodiment of the present invention.
【図２】図１のＡ部を拡大して示す縦断面図。FIG. 2 is a longitudinal sectional view showing an enlarged part A of FIG.
【図３】図１のマグネトロンにおける金属スペ−サの開
口近傍を示す平面図。3 is a plan view showing the vicinity of an opening of a metal spacer in the magnetron shown in FIG.
【図４】従来のマグネトロンを示す縦断面図。FIG. 4 is a vertical sectional view showing a conventional magnetron.
【図５】従来の他のマグネトロンを示す縦断面図。FIG. 5 is a vertical sectional view showing another conventional magnetron.
【図６】従来の他のマグネトロンを示す縦断面図。FIG. 6 is a vertical cross-sectional view showing another conventional magnetron.
【図７】マグネトロンを電子レンジのオ−ブンに取付け
る状態を示す縦断面図。FIG. 7 is a vertical sectional view showing a state in which the magnetron is attached to an oven of a microwave oven.
１…発振部本体、２…冷却フィン、３…永久磁石、５…
上部ヨ−ク、６…ガスケット受リング、７…ガスケッ
ト、９…金属容器、１０…出力部、１５…金属スペ−
サ。1 ... Oscillator main body, 2 ... Cooling fin, 3 ... Permanent magnet, 5 ...
Upper yoke, 6 ... Gasket receiving ring, 7 ... Gasket, 9 ... Metal container, 10 ... Output part, 15 ... Metal space
Sa.
Claims (1)
て出力部を突設し、上記金属容器の周囲にリング状永久
磁石を設け、この永久磁石，上記発振部本体等を取囲む
ようにヨ−クを配設し、このヨ−クの中央開口部にリン
グ状導電ガスケットを設け、更にこのガスケットおよび
上記ヨ−クと上記永久磁石との間にリング状金属スペ−
サを挾むマグネトロンの組立方法において、 上記金属スペ−サの開口近傍を予め折曲げておき、該金
属スペ−サを上記ガスケットおよび上記ヨ−クと上記永
久磁石との間に挾んで上記ヨ−クを締付け、上記折曲げ
部を水平状態に近づけて上記出力部の導電体壁に近接又
は密接させることを特徴とするマグネトロンの組立方
法。1. An output part is projected from one end of the oscillator body via a cylindrical metal container, and a ring-shaped permanent magnet is provided around the metal container to surround the permanent magnet, the oscillator body, and the like. And a ring-shaped conductive gasket is provided in the center opening of the yoke, and a ring-shaped metal space is provided between the gasket and the yoke and the permanent magnet.
In a method of assembling a magnetron that sandwiches a rotor, the vicinity of the opening of the metal spacer is bent in advance, and the metal spacer is sandwiched between the gasket and the yoke and the permanent magnet. A method of assembling a magnetron, characterized by tightening a hook to bring the bent portion closer to a horizontal state to bring it closer or closer to the conductor wall of the output portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4247799A JPH06103887A (en) | 1992-09-17 | 1992-09-17 | Method for assembling magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4247799A JPH06103887A (en) | 1992-09-17 | 1992-09-17 | Method for assembling magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06103887A true JPH06103887A (en) | 1994-04-15 |
Family
ID=17168831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4247799A Pending JPH06103887A (en) | 1992-09-17 | 1992-09-17 | Method for assembling magnetron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06103887A (en) |
-
1992
- 1992-09-17 JP JP4247799A patent/JPH06103887A/en active Pending
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