JPS63221536A - Radio wave leak preventing device for magnetron - Google Patents
Radio wave leak preventing device for magnetronInfo
- Publication number
- JPS63221536A JPS63221536A JP5190487A JP5190487A JPS63221536A JP S63221536 A JPS63221536 A JP S63221536A JP 5190487 A JP5190487 A JP 5190487A JP 5190487 A JP5190487 A JP 5190487A JP S63221536 A JPS63221536 A JP S63221536A
- Authority
- JP
- Japan
- Prior art keywords
- flange
- magnetron
- case
- filter
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002265 prevention Effects 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 10
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 2
- 238000002788 crimping Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
Landscapes
- Microwave Tubes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はマグネトロンの電波漏洩防止装置に係わり、特
にマグネトロンから発生する高調波等の特定の強い雑音
電波の漏洩を抑制する雑音消去用フィルタ回路を格納す
るフィルタケースの構造に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetron radio wave leakage prevention device, and in particular to a noise canceling filter circuit that suppresses the leakage of specific strong noise radio waves such as harmonics generated from a magnetron. This concerns the structure of the filter case that stores the .
通常、マグネトロンの発振時には、その陰極回路部を伝
播してマグネトロンの発振基本波をはじめとする高調波
、さらにはVHF、UHF帯波などが外部へ不要輻射電
波として放射される。このため、マグネトロンにはこの
陰極回路部からの雑音電波を減衰消去させ、テレビ、ラ
ジオ、無線通信などへの影響をなくすような雑音消去用
フィルタ回路を取シ付けることが義務付けられている。Normally, when a magnetron oscillates, harmonics including the magnetron's oscillation fundamental wave, as well as VHF and UHF band waves, propagate through its cathode circuit and are radiated to the outside as unnecessary radio waves. For this reason, the magnetron is required to be equipped with a noise-cancelling filter circuit that attenuates and eliminates the noise radio waves from the cathode circuit and eliminates the influence on television, radio, wireless communications, etc.
このようなフィルタ回路は例えは特開昭55−4984
4号公報などにおいて開示されている。An example of such a filter circuit is Japanese Patent Application Laid-Open No. 55-4984.
This is disclosed in Publication No. 4, etc.
このようなフィルタ回路は、一般にはコイルとコンデン
サとの組合せからなるもので、これはマグネトロンの陰
極回路部の入力端子部にフィルタケースを設け、、この
フィルタケース内に収納配置されるが、従来のその取り
付は構造を図面をもとに詳細に説明する。Such a filter circuit generally consists of a combination of a coil and a capacitor.A filter case is provided at the input terminal of the magnetron's cathode circuit, and the filter circuit is housed within the filter case. The structure of the installation will be explained in detail based on the drawings.
第7図および第8図は従来のマグネトロンの電波漏洩防
止装置の構造を示す一部切り欠き平面図およびその要部
断面図で、要部以外は省略しである。これらの図におい
て、1は公知の内部構造を有しかつ高周波エネルギーを
出力するマグネトロン本体であり、このマグネトロ/本
体1にはその高周波出力部2および陰極入力部3側に円
板状の整磁板4,5を介して円環状の永久磁石6,7が
それぞれ配設され、磁気回路を形成する磁性材からなる
上ヨーク8と下ヨーク9との間に挾持されてネジ10に
より保持固定されている。また、このマグネトロン本体
1の外周部には周側面を包囲するラジェターフィン11
が嵌合配置されている。FIGS. 7 and 8 are a partially cutaway plan view and a sectional view of the main parts of the structure of a conventional magnetron radio wave leakage prevention device, and other parts are omitted. In these figures, 1 is a magnetron main body that has a known internal structure and outputs high-frequency energy, and this magnetron/main body 1 has a disk-shaped magnetic shunt on the high-frequency output section 2 and cathode input section 3 side. Annular permanent magnets 6 and 7 are disposed through plates 4 and 5, respectively, and are held and fixed by screws 10 between an upper yoke 8 and a lower yoke 9 made of magnetic material forming a magnetic circuit. ing. Further, on the outer circumference of the magnetron main body 1, a radiator fin 11 surrounding the circumferential side is provided.
are arranged in a mating manner.
さらにこのマグネトロン本体1の陽極入力部3には外部
へ漏洩する雑音電波を減衰消去させるコイル12とコン
デンサ13とからなるフィルタ回路14を収納させるフ
ィルタケース15および蓋16が取り付け固定され、こ
のフィルタ回路14はそのコイル12が陰極入力部3の
ステム17先端部に設けられた一対の陰極端子18に接
続され、コンデンサ13はフィルタケース15を貫通し
て外部にその他端部を突出させ、外部交流電源と接続さ
せる入力端子19が一体的に設けられている。Further, a filter case 15 and a lid 16 are attached and fixed to the anode input section 3 of the magnetron main body 1 to house a filter circuit 14 consisting of a coil 12 and a capacitor 13 that attenuate and eliminate noise radio waves leaking to the outside. 14, the coil 12 thereof is connected to a pair of cathode terminals 18 provided at the tip of the stem 17 of the cathode input section 3, and the capacitor 13 penetrates the filter case 15 with the other end protruding to the outside, and is connected to an external AC power source. An input terminal 19 to be connected to is integrally provided.
しかしながら、このように構成されるマグネトロンの電
波漏洩防止装置において、フィルタケース15内にフィ
ルタ回路14を収納した後にフィルタケース15の開口
周縁部と蓋16の周縁部とを組み合わせ、隙間が生じな
いようにかしめによシ密着嵌合される。However, in the magnetron radio wave leakage prevention device configured as described above, after the filter circuit 14 is housed in the filter case 15, the opening periphery of the filter case 15 and the lid 16 are combined to prevent a gap from forming. It is tightly fitted by caulking.
ところが、フィルタケース15内にはマグネトロンの発
振基本周波数2450MHzおよびその高調波成分が充
満してお9、僅かの隙間からこの樵の電波が漏洩する。However, the filter case 15 is filled with the magnetron's fundamental oscillation frequency of 2450 MHz and its harmonic components 9, and the radio waves from this woodcutter leak through a small gap.
したがって抑制すべき不要輻射電波の1/4波長のピッ
チで確実に電気的接触をもたせる必要がある。また、蓋
16が外れた場合には大きなエネルギーをもつ2450
F、1Hzの発蚤基本波の漏洩が生じ、人体に害を与
えることから、蓋16の抜去力に対しては十分な信頼性
をもたせる必要がある。Therefore, it is necessary to ensure electrical contact at a pitch of 1/4 wavelength of the unnecessary radiated radio waves to be suppressed. In addition, if the lid 16 comes off, 2450, which has a large amount of energy,
Since the leakage of the fundamental wave of 1 Hz noise may occur and cause harm to the human body, it is necessary to provide sufficient reliability with respect to the force with which the lid 16 is removed.
したがって本発明は前述した従来の問題に鑑みてなされ
たものであり、その目的は、フィルタケースとその蓋と
の電気的接触および抜去力機能を向上させ、信頼性を向
上させたマグネトロンの電波漏洩防止装置を提供するこ
とにある。Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its purpose is to improve the electrical contact between the filter case and its lid and the removal force function, and to improve the reliability of the magnetron's radio wave leakage. The object of the present invention is to provide a prevention device.
本発明に係わるマグネトロンの電波漏洩防止装置は、フ
ィルタケースの開口周縁部にフランジ部を設け、この7
2ンジ部の下部側でそのケース蓋と密着嵌合させるとと
もにフランジ部端面とケース蓋とをn次高調波のシ4の
ピッチを有するかしめ歯形で接触させるものである。The magnetron radio wave leakage prevention device according to the present invention includes a flange portion provided at the periphery of the opening of the filter case.
The lower part of the second flange part is tightly fitted with the case lid, and the end face of the flange part and the case lid are brought into contact with each other in a caulked tooth shape having a pitch of 4 of the n-th harmonic.
本発明においては、フランジ部がケース蓋の抜去力を係
止し、かしめ歯形の接触によりn次高調波の漏洩を抑制
する。In the present invention, the flange portion locks the removal force of the case lid, and the contact of the caulked teeth suppresses leakage of n-th harmonics.
以下、図面を用いて本発明の実施例を詳細に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
第1図は本発明によるマグネトロンの電波漏洩防止装置
の一実施例を示す要部断面図であり、前述の図と同一部
分には同一符号を付しその説明は省略する。同図におい
て、フィルタケース15の開口周縁部には第2図に拡大
断面図で示すようにその先端部を外側に折シ曲けたフラ
ンジ部15aが全周にわたって形成されている。一方、
これに対して蓋16の周縁部には前記7ランク部15a
を嵌入する空胴部を有する7ランク部16aが形成され
ている。そして、フィルタケース15内にフィルタ回路
14を収納した後、フィルタケース15の7ランク部1
5mと蓋16の7ランク部16a とを組み合わせて管
軸方向から機械的圧力を加えることによシ嵌合させる。FIG. 1 is a sectional view of a main part showing an embodiment of the electromagnetic wave leakage prevention device for a magnetron according to the present invention, and the same parts as those in the above-mentioned figures are given the same reference numerals, and the explanation thereof will be omitted. In the figure, a flange part 15a is formed around the entire circumference of the opening of the filter case 15, as shown in the enlarged cross-sectional view in FIG. 2, with its tip bent outward. on the other hand,
On the other hand, the peripheral edge of the lid 16 has the seventh rank portion 15a.
A 7-rank portion 16a is formed having a cavity into which the 7-rank portion 16a is inserted. After storing the filter circuit 14 in the filter case 15, the 7 rank section 1 of the filter case 15 is
5m and the 7-rank portion 16a of the lid 16 and are fitted together by applying mechanical pressure from the tube axis direction.
引き続き第3図に示すように蓋16の周辺溝部16bに
受は治具30t−配置し、第4図に示すようにn次高調
波のλ/4(波長〕のピッチで配列されたかしめ刃31
&を有するかしめ治具31を蓋16のフランジ部16a
外周面に矢印入方向に機械的圧力を加えてかしめること
により、第5図に示すようにフィルタケース15のフラ
ンジ部15a とケース蓋1Gのフランジ部16aとの
接触面にV字状のかしめ歯形20が形成され、フィルタ
ケース15のフランジ部15a端面とケース蓋16の7
ランク部16a 内面とが両者の周縁部にわたってn次
高調波のλ/4波長のピッチで接触されるとともにケー
ス蓋16のフランジ部16aがフィルタケース15のフ
ランジ部15a下側にかしめられ密着嵌合される。Subsequently, as shown in FIG. 3, a receiver jig 30t is placed in the peripheral groove 16b of the lid 16, and caulking blades are arranged at a pitch of λ/4 (wavelength) of the n-th harmonic as shown in FIG. 31
The crimping jig 31 having & is attached to the flange portion 16a of the lid 16.
By applying mechanical pressure to the outer peripheral surface in the direction of the arrow and caulking, a V-shaped caulking is formed on the contact surface between the flange portion 15a of the filter case 15 and the flange portion 16a of the case lid 1G, as shown in FIG. A tooth profile 20 is formed between the end face of the flange portion 15a of the filter case 15 and the 7 of the case lid 16.
The inner surface of the rank part 16a is brought into contact with the inner surface of the rank part 16a at a pitch of λ/4 wavelength of the n-th harmonic across their peripheral edges, and the flange part 16a of the case lid 16 is caulked to the lower side of the flange part 15a of the filter case 15 for a tight fit. be done.
このような構成によれば、フィルタケース15の開口周
縁部に7ランク部15a を設けてケース蓋16のフラ
ンジ部16m と密着嵌合させたことにより、フィルタ
ケース15のフランジ部15aがケース蓋16の抜は方
向に対してストッパとなるので、ケース蓋16の抜去力
を大幅に向上させることができる。また、フィルタケー
ス15の7279部15mとケース蓋16の7ランク部
16との接触面にn次高調波の94波長ピツチのかしめ
歯形20を形成して接触させたことにより、フィルタケ
ース15とケース蓋16との電気的接触が確実かつ完全
となシ、n次高調波の漏洩を大幅に低減させることがで
きる。According to such a configuration, the 7-rank portion 15a is provided at the opening peripheral edge of the filter case 15 and closely fitted with the flange portion 16m of the case lid 16, so that the flange portion 15a of the filter case 15 is connected to the case lid 16. Since the removal acts as a stopper in the direction, the removal force of the case lid 16 can be greatly improved. In addition, by forming a crimp tooth shape 20 with a pitch of 94 wavelengths of the n-th harmonic on the contact surface between the 7279 part 15m of the filter case 15 and the 7 rank part 16 of the case lid 16, the filter case 15 and the case are brought into contact. If electrical contact with the lid 16 is reliable and complete, leakage of n-th harmonics can be significantly reduced.
なお、前述した実施例において、フィルタケース15の
7ランク部15aはその先端部を外側に向けて形成した
場合について説明したが、第6図に示すように内側に向
けて形成しても同様の効果が得られることは勿論である
。In the above-mentioned embodiment, the case where the 7-rank part 15a of the filter case 15 was formed with its tip facing outward was explained, but the same effect can be obtained even if it is formed with the tip facing inward as shown in FIG. Of course, the effect can be obtained.
また、前述した実施例において、蓋16のフランジ部1
6aの外周面側にかしめ刃31aによるかしめ歯形20
を形成した場合について説明したが、同時Vζ内周面側
も同様なかしめ歯形20を形成することにより電気的接
触性をさらに向上させることができる。Further, in the embodiment described above, the flange portion 1 of the lid 16
A caulking tooth profile 20 formed by a caulking blade 31a is formed on the outer peripheral surface of 6a.
Although a case has been described in which a similar caulked tooth profile 20 is formed on the inner circumferential surface of Vζ at the same time, electrical contact can be further improved.
以上説明したように本発明によれば、フィルタケースの
開口周縁部にフランジ部を設け、該フランジ部の下側で
ケース蓋と密着嵌合させるとともに該フランジ部の端面
とケース蓋とをn次高調波のX/4波長のピッチを有す
るかしめ歯形で接触させたことにより、抜去力が大幅に
低減されるとともにn次高調波の漏洩が抑制され、品質
および信頼性の高いマグネトロンの電波漏洩防止装置が
得られるという極めて優れた効果が得られる。As explained above, according to the present invention, a flange is provided at the periphery of the opening of the filter case, and the flange is closely fitted with the case lid on the lower side of the flange, and the end face of the flange and the case lid are connected to the n-th order. By making contact with a caulked tooth shape with a pitch of X/4 wavelength of harmonics, the extraction force is significantly reduced and leakage of n-th harmonics is suppressed, resulting in high quality and reliable magnetron radio wave leakage prevention. An extremely excellent effect can be obtained in that the device is obtained.
第1図は本発明によるマグネトロンの電波漏洩防止装置
の一実施例を示す断面図、第2図および第3図はフィル
タケースの72ンジ部とケース蓋のフランジ部との嵌合
関係を示す要部拡大断面図、第4因はかしめ治具を示す
斜視図、第5図はフィルタケースのフランジ部とケース
蓋の7ランク部との電気的接触関係を示す要部拡大断面
図、第6図は本発明によるマグネトロンの電波漏洩防止
装置の他の実施例を示す要部拡大断面図、第7図。
第8図は従来のマグネトロンの電波漏洩防止装置の構造
を示す一部切欠き平面図、その要部断面図である。
3・・・・陰極入力部、12・・・・コイル、13・・
・・コンデンサ、14・・・・フィルタ回路、15−・
・拳フィルタケース、15a ・・・・フランジ部、1
6・・・・ケース蓋、16a・・自・7279部、16
b ・・・・周辺溝部、20・争・働かしめ歯形、30
争・e11受げ治具、31・・ψ・かしめ治具、31a
・・・・かしめ刃。FIG. 1 is a sectional view showing an embodiment of the magnetron radio wave leakage prevention device according to the present invention, and FIGS. 2 and 3 are main points showing the fitting relationship between the 72-inch portion of the filter case and the flange portion of the case lid. The fourth factor is a perspective view showing the caulking jig, FIG. 5 is an enlarged sectional view of the main part showing the electrical contact relationship between the flange of the filter case and the rank 7 part of the case lid, and FIG. 6 FIG. 7 is an enlarged sectional view of a main part showing another embodiment of the electromagnetic wave leakage prevention device for a magnetron according to the present invention. FIG. 8 is a partially cutaway plan view showing the structure of a conventional radio wave leakage prevention device for a magnetron, and a sectional view of the main part thereof. 3... Cathode input section, 12... Coil, 13...
...Capacitor, 14...Filter circuit, 15-...
・Fist filter case, 15a ... flange part, 1
6...Case lid, 16a...Original 7279 copies, 16
b ... Peripheral groove, 20, conflict, working tooth profile, 30
Conflict/e11 receiving jig, 31...ψ/caulking jig, 31a
...Caulking blade.
Claims (1)
たフイルタケース内に、コイルとコンデンサとからなる
フイルタ回路を収納し、ケース蓋により嵌合されたマグ
ネトロンの電波漏洩防止装置において、前記フイルタケ
ースの開口周辺部にフランジ部を設け、該フランジ部の
下側でケース蓋と密着嵌合させるとともに該フランジ部
の端面とケース蓋とをn次高調波のλ/4(波長)のピ
ツチを有するかしめ歯形で接触させたことを特徴とする
マグネトロンの電波漏洩防止装置。1. In a magnetron radio wave leakage prevention device in which a filter circuit consisting of a coil and a capacitor is housed in a filter case that is attached and fixed to the cathode input section of the magnetron main body, and is fitted with a case lid, the opening of the filter case A flange portion is provided at the periphery, and the lower side of the flange portion is tightly fitted with the case lid, and the end face of the flange portion and the case lid are formed into a caulked tooth shape having a pitch of λ/4 (wavelength) of the n-th harmonic. A magnetron radio wave leakage prevention device characterized in that the magnetron is brought into contact with the
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62051904A JP2690892B2 (en) | 1987-03-09 | 1987-03-09 | Magnetron |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62051904A JP2690892B2 (en) | 1987-03-09 | 1987-03-09 | Magnetron |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63221536A true JPS63221536A (en) | 1988-09-14 |
JP2690892B2 JP2690892B2 (en) | 1997-12-17 |
Family
ID=12899866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62051904A Expired - Fee Related JP2690892B2 (en) | 1987-03-09 | 1987-03-09 | Magnetron |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2690892B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5886592A (en) * | 1996-09-18 | 1999-03-23 | Tdk Corporation | Feedthrough ceramic capacitor having a grounding fitting for frictionally fixing the capacitor to a capacitor support |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50852U (en) * | 1973-05-02 | 1975-01-07 | ||
JPS6288359U (en) * | 1985-11-22 | 1987-06-05 |
-
1987
- 1987-03-09 JP JP62051904A patent/JP2690892B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50852U (en) * | 1973-05-02 | 1975-01-07 | ||
JPS6288359U (en) * | 1985-11-22 | 1987-06-05 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5886592A (en) * | 1996-09-18 | 1999-03-23 | Tdk Corporation | Feedthrough ceramic capacitor having a grounding fitting for frictionally fixing the capacitor to a capacitor support |
Also Published As
Publication number | Publication date |
---|---|
JP2690892B2 (en) | 1997-12-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |