JP2000228307A - Demagnetizing device - Google Patents
Demagnetizing deviceInfo
- Publication number
- JP2000228307A JP2000228307A JP2750499A JP2750499A JP2000228307A JP 2000228307 A JP2000228307 A JP 2000228307A JP 2750499 A JP2750499 A JP 2750499A JP 2750499 A JP2750499 A JP 2750499A JP 2000228307 A JP2000228307 A JP 2000228307A
- Authority
- JP
- Japan
- Prior art keywords
- degaussing
- coil
- demagnetizing
- shielding plate
- magnetic
- 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
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- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Conductive Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願の発明は、磁性部材に消
磁コイルが取り付けられている消磁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 degaussing device in which a degaussing coil is attached to a magnetic member.
【０００２】[0002]
【従来の技術】テレビジョン受像機やコンピュータディ
スプレイ等の陰極線管では、電子ビームに対するアパー
チャグリル等からの磁界の影響を低減させるために、消
磁コイルが設けられており、電源印加時に減衰交流電流
が消磁コイルに流されて、アパーチャグリル等が自動的
に消磁されている。また、電子ビームに対する地磁気等
の外部磁界の影響を低減させると共に消磁コイルによる
起磁力を増大させるために、陰極線管の側面が磁気遮蔽
板で囲われており、この磁気遮蔽板に消磁コイルが取り
付けられて、眼鏡型や８字型やＯリング型等の消磁コイ
ルが陰極線管の上下等に配置されている消磁装置が一般
的に採用されている。2. Description of the Related Art In a cathode ray tube such as a television receiver or a computer display, a degaussing coil is provided to reduce the effect of a magnetic field from an aperture grill or the like on an electron beam. The current is passed through the degaussing coil, and the aperture grill and the like are automatically degaussed. The side of the cathode ray tube is surrounded by a magnetic shielding plate to reduce the effect of external magnetic fields such as terrestrial magnetism on the electron beam and increase the magnetomotive force of the degaussing coil. The degaussing coil is attached to this magnetic shielding plate In addition, a degaussing apparatus in which a degaussing coil of an eyeglass type, a figure-eight type, an O-ring type or the like is disposed above and below a cathode ray tube is generally employed.
【０００３】図２、３は、この様な消磁装置の一従来例
を備えている陰極線管を示している。この陰極線管１１
のパネルのスカート部は鋼製の防爆補強バンド１２で締
め付けられており、この防爆補強バンド１２に消磁装置
１３が取り付けられている。消磁装置１３には鉄、鉄合
金、珪素鋼、ジンコート材等から成っている長方形の枠
状の磁気遮蔽板１４が備えられており、溝状のコイルホ
ルダ１５及び接着剤付きのスペーサ１６によって銅製の
消磁コイル１７が磁気遮蔽板１４の上辺部及び下辺部に
取り付けられている。FIGS. 2 and 3 show a cathode ray tube provided with a conventional example of such a degaussing device. This cathode ray tube 11
The skirt portion of the panel is fastened by a steel explosion-proof reinforcing band 12, and a demagnetizing device 13 is attached to the explosion-proof reinforcing band 12. The degaussing device 13 is provided with a rectangular frame-shaped magnetic shielding plate 14 made of iron, iron alloy, silicon steel, zinc coating material, or the like, and is made of copper by a groove-shaped coil holder 15 and a spacer 16 with an adhesive. Are mounted on the upper side and the lower side of the magnetic shielding plate 14.
【０００４】[0004]
【発明が解決しようとする課題】ところで、消磁装置１
３による消磁には一般に商用電源が用いられており、商
用電源周波数による減衰曲線を描く消磁コイル１７から
の減衰交流磁界によって磁気遮蔽板１４に力が加えられ
る。このため、消磁時に磁気遮蔽板１４が振動し、この
振動音が不快音として耳に聞こえる。The degaussing device 1
In general, a commercial power supply is used for degaussing by 3, and a force is applied to the magnetic shield plate 14 by an attenuated AC magnetic field from a degaussing coil 17 that draws an attenuation curve depending on the frequency of the commercial power supply. For this reason, the magnetic shielding plate 14 vibrates at the time of demagnetization, and this vibration sound is audible as unpleasant sound.
【０００５】図２、３に示した一従来例の消磁装置１３
では、接着剤付きのスペーサ１６で消磁コイル１７を磁
気遮蔽板１４に固定し、磁気遮蔽板１４の振動エネルギ
ーと消磁コイル１７の振動エネルギーとを互いに吸収さ
せることによって、磁気遮蔽板１４の振動を抑制してい
る。しかし、一従来例の消磁装置１３では、この様な構
造を採用しても、消磁時の不快音を十分には軽減させる
ことができなかった。従って、本願の発明は、磁性部材
の振動による消磁時の不快音が小さい消磁装置を提供す
ることを目的としている。A conventional degaussing device 13 shown in FIGS.
Then, the vibration of the magnetic shielding plate 14 is fixed by fixing the demagnetizing coil 17 to the magnetic shielding plate 14 with the spacer 16 with an adhesive and absorbing the vibration energy of the magnetic shielding plate 14 and the vibration energy of the demagnetizing coil 17 to each other. Restrained. However, in the conventional degaussing device 13, even if such a structure is employed, the unpleasant sound at the time of degaussing cannot be sufficiently reduced. Accordingly, it is an object of the present invention to provide a degaussing device in which unpleasant noise during degaussing due to vibration of a magnetic member is small.
【０００６】[0006]
【課題を解決するための手段】請求項１に係る消磁装置
では、消磁コイルが銅よりも質量密度の小さな材料から
成っているので、一般に銅から成っている通常の消磁コ
イルに比べて消磁コイルの質量が軽い。このため、消磁
時に消磁コイルから発生される減衰交流磁界によって磁
性部材に力が加えられて磁性部材が振動し、磁性部材と
この磁性部材に取り付けられている消磁コイルとが互い
に力を及ぼし合っても、消磁時における磁性部材の振動
の振幅が小さく、また、消磁コイルの材料や消磁装置や
消磁装置が取り付けられた装置等の質量が軽い。In the degaussing device according to the first aspect, the degaussing coil is made of a material having a lower mass density than copper, so that the degaussing coil is generally compared with a normal degaussing coil made of copper. Is light in weight. For this reason, force is applied to the magnetic member by the decaying AC magnetic field generated from the degaussing coil during degaussing, and the magnetic member vibrates, and the magnetic member and the degaussing coil attached to the magnetic member exert forces on each other. Also, the amplitude of the vibration of the magnetic member at the time of degaussing is small, and the mass of the material of the degaussing coil and the degaussing device and the device to which the degaussing device is attached are light.
【０００７】請求項２に係る消磁装置では、消磁コイル
が磁性部材に非固定的に取り付けられているので、磁性
部材に取り付けられている消磁コイルの質量が更に軽い
ことと実質的に同等であり、また、消磁コイルを磁性部
材に固定的に取り付けるための部品や作業が不要であ
る。In the degaussing device according to the second aspect, since the degaussing coil is fixedly attached to the magnetic member, the mass of the degaussing coil attached to the magnetic member is substantially equal to that of a lighter mass. Also, there is no need for parts or work for fixedly attaching the degaussing coil to the magnetic member.
【０００８】請求項３に係る消磁装置では、磁性部材が
陰極線管用の磁気遮蔽板であるので、磁性部材によって
消磁時の起磁力を増大させることができるのみならず地
磁気等の外部磁界が陰極線管に及ぼす影響を低減させる
こともできる。In the degaussing apparatus according to the third aspect, since the magnetic member is a magnetic shielding plate for a cathode ray tube, not only the magnetomotive force at the time of demagnetization can be increased by the magnetic member but also an external magnetic field such as terrestrial magnetism can be generated. Can be reduced.
【０００９】請求項４に係る消磁装置では、消磁コイル
がアルミニウムから成っており、アルミニウムは銅より
も安価で且つ容易に曲げ加工を施すことができる。この
ため、消磁コイルの製造コストが低く、また、複雑な形
状の消磁コイルを実現することができる。In the degaussing device according to the fourth aspect, the degaussing coil is made of aluminum, and aluminum can be bent at a lower cost and more easily than copper. Therefore, the manufacturing cost of the degaussing coil is low, and a degaussing coil having a complicated shape can be realized.
【００１０】[0010]
【発明の実施の形態】以下、本願の発明の一実施形態
を、図１を参照しながら説明する。図１は、本実施形態
の消磁装置を備えている陰極線管を示している。この陰
極線管１１のパネルのスカート部は鋼製の防爆補強バン
ド１２で締め付けられており、この防爆補強バンド１２
に消磁装置２１が取り付けられている。消磁装置２１に
は鉄、鉄合金、珪素鋼、ジンコート材等から成っている
長方形の枠状の磁気遮蔽板２２が備えられており、溝状
のコイルホルダ２３によってアルミニウム製で且つ眼鏡
型の消磁コイル２４が磁気遮蔽板２２の上辺部及び下辺
部に取り付けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows a cathode ray tube including the degaussing device of the present embodiment. The skirt portion of the panel of the cathode ray tube 11 is fastened with a steel explosion-proof reinforcing band 12.
The degaussing device 21 is attached to the. The degaussing device 21 is provided with a rectangular frame-shaped magnetic shielding plate 22 made of iron, iron alloy, silicon steel, zinc coating material, or the like. The coils 24 are attached to the upper side and the lower side of the magnetic shielding plate 22.
【００１１】ところで、磁気遮蔽板２２と消磁コイル２
４とを商用電源周波数付近の振動数で且つ同一の振幅で
振動させると、線状の消磁コイル２４よりも板状の磁気
遮蔽板２２の方が空気と接触している面積が大きいの
で、消磁コイル２４よりも磁気遮蔽板２２から聞こえる
音の方が遙かに大きい。このため、消磁時の不快音を小
さくするためには、磁気遮蔽板２２の振動を抑制するこ
とが重要である。The magnetic shielding plate 22 and the degaussing coil 2
4 is vibrated at a frequency near the commercial power frequency and at the same amplitude, the plate-shaped magnetic shielding plate 22 has a larger area in contact with air than the linear degaussing coil 24. The sound heard from the magnetic shielding plate 22 is much louder than the coil 24. Therefore, it is important to suppress the vibration of the magnetic shielding plate 22 in order to reduce the unpleasant sound at the time of demagnetization.
【００１２】一方、図２、３に示した一従来例の消磁装
置１３では、上述の様に、接着剤付きのスペーサ１６で
消磁コイル１７を磁気遮蔽板１４に固定し、磁気遮蔽板
１４の振動エネルギーと消磁コイル１７の振動エネルギ
ーとを互いに吸収させることによって、磁気遮蔽板１４
の振動を抑制している。On the other hand, in the conventional degaussing device 13 shown in FIGS. 2 and 3, the degaussing coil 17 is fixed to the magnetic shielding plate 14 by the spacer 16 with the adhesive as described above, By absorbing the vibration energy and the vibration energy of the demagnetizing coil 17 to each other, the magnetic shielding plate 14
Vibration is suppressed.
【００１３】しかし、磁気遮蔽板１４の振動エネルギー
を吸収した消磁コイル１７も振動し、この消磁コイル１
７が再び磁気遮蔽板１４を振動させる。そして、磁気遮
蔽板１４と消磁コイル１７とが互いに自由に力を及ぼし
合うと、夫々の振動の振幅は夫々の質量に反比例する。
この一従来例の消磁装置１３では、消磁コイル１７が銅
製であり、銅の質量密度が８．９３ｇｃｍ-3と比較的大
きいので、上述の様に、消磁時に磁気遮蔽板１４から聞
こえる不快音が大きかった。However, the degaussing coil 17 that has absorbed the vibration energy of the magnetic shielding plate 14 also vibrates, and this degaussing coil 1
7 vibrates the magnetic shielding plate 14 again. Then, when the magnetic shielding plate 14 and the degaussing coil 17 freely apply a force to each other, the amplitude of each vibration is inversely proportional to each mass.
In this conventional degaussing device 13, the degaussing coil 17 is made of copper, and the mass density of copper is relatively large at 8.93 gcm -3 , so that the unpleasant sound heard from the magnetic shield plate 14 during degaussing as described above. It was big.
【００１４】これに対して、本実施形態の消磁装置２１
では消磁コイル２４がアルミニウム製であり、アルミニ
ウムの質量密度は２．６９ｇｃｍ-3であり銅の質量密度
の１／３以下である。また、アルミニウムの導電率が
２．５×１０-8Ωｍであり銅の導電率が１．５５×１０
-8Ωｍであるので、アルミニウムの抵抗率は銅の抵抗率
の１．６倍程度でしかない。このため、消磁コイル１
７、２４の断面積同士が等しければ消磁コイル２４の質
量の方が当然に軽く、消磁コイル１７、２４の抵抗が同
程度になるまで消磁コイル２４の断面積を大きくしたと
しても依然として消磁コイル２４の質量の方が軽い。On the other hand, the degaussing device 21 of the present embodiment
In this case, the degaussing coil 24 is made of aluminum, and the mass density of aluminum is 2.69 gcm −3, which is 1/3 or less of the mass density of copper. The conductivity of aluminum is 2.5 × 10 −8 Ωm and the conductivity of copper is 1.55 × 10
-8 Ωm, the resistivity of aluminum is only about 1.6 times that of copper. Therefore, the degaussing coil 1
If the cross-sectional areas of the demagnetizing coils 24 are equal to each other, the mass of the degaussing coil 24 is naturally lighter. Is lighter in mass.
【００１５】しかも、図１と図２との比較からも明らか
な様に、本実施形態の消磁装置２１では、接着剤付きの
スペーサで消磁コイル２４が磁気遮蔽板２２に固定され
ておらず、コイルホルダ２３の数もコイルホルダ１５の
数より少ない。このため、磁気遮蔽板２２に取り付けら
れている消磁コイル２４の質量が更に軽いことと実質的
に同等であり、消磁時に磁気遮蔽板２２から聞こえる不
快音が小さいのみならず、接着剤付きのスペーサ及びコ
イルホルダ２３の部品コスト並びに磁気遮蔽板２２への
消磁コイル２４の取り付けコストも低い。Further, as is apparent from a comparison between FIG. 1 and FIG. 2, in the degaussing device 21 of the present embodiment, the degaussing coil 24 is not fixed to the magnetic shielding plate 22 by a spacer with an adhesive, The number of coil holders 23 is also smaller than the number of coil holders 15. For this reason, the mass of the degaussing coil 24 attached to the magnetic shielding plate 22 is substantially the same as that of the magnetic shielding plate 22, and not only is the unpleasant sound heard from the magnetic shielding plate 22 at the time of degaussing small, but also the spacer with the adhesive is used. Also, the cost of parts of the coil holder 23 and the cost of attaching the degaussing coil 24 to the magnetic shielding plate 22 are low.
【００１６】なお、以上の実施形態の消磁装置２１では
消磁コイル２４がアルミニウム製であるが、一従来例の
消磁装置１３における消磁コイル１７の材料である銅よ
りも質量密度の小さな導電体であれば、この様な導電体
が消磁コイル２４の材料になっていてもよい。また、以
上の実施形態の消磁装置２１では消磁コイル２４が眼鏡
型であるが、消磁コイル２４が８字型やＯリング型等で
あってもよい。また、以上の実施形態の消磁装置２１で
は磁気遮蔽板２２に消磁コイル２４が取り付けられてい
るが、磁気遮蔽板２２以外の磁性部材に消磁コイル２４
が取り付けられていてもよい。In the degaussing device 21 of the above embodiment, the degaussing coil 24 is made of aluminum. However, if the degaussing coil 13 of the conventional degaussing device 13 is made of a conductor having a lower mass density than copper, which is the material of the degaussing coil 17. For example, such a conductor may be the material of the degaussing coil 24. Further, in the degaussing device 21 of the above embodiment, the degaussing coil 24 is of an eyeglass type, but the degaussing coil 24 may be of a figure-eight or O-ring type. Although the degaussing coil 24 is attached to the magnetic shield plate 22 in the degaussing device 21 of the above embodiment, the degaussing coil 24 is attached to a magnetic member other than the magnetic shield plate 22.
May be attached.
【００１７】[0017]
【発明の効果】請求項１に係る消磁装置では、消磁時に
おける磁性部材の振動の振幅が小さいので、磁性部材の
振動による消磁時の不快音が小さい。また、消磁コイル
の材料や消磁装置そのものや消磁装置が取り付けられて
いる装置等の質量が軽いので、これらの輸送や取扱いが
容易である。In the degaussing apparatus according to the first aspect, the amplitude of the vibration of the magnetic member during degaussing is small, so that the unpleasant noise during degaussing due to the vibration of the magnetic member is small. Further, since the mass of the material of the degaussing coil, the degaussing device itself, the device to which the degaussing device is attached, and the like are light, transportation and handling thereof are easy.
【００１８】請求項２に係る消磁装置では、磁性部材に
取り付けられている消磁コイルの質量が更に軽いことと
実質的に同等であるので、磁性部材の振動による消磁時
の不快音が更に小さい。また、消磁コイルを磁性部材に
固定的に取り付けるための部品や作業が不要であるの
で、消磁装置の製造コストが低い。In the degaussing device according to the second aspect, since the mass of the degaussing coil attached to the magnetic member is substantially equal to that of a lighter one, unpleasant noise during degaussing due to vibration of the magnetic member is further reduced. In addition, since there is no need for a component or an operation for fixedly attaching the degaussing coil to the magnetic member, the manufacturing cost of the degaussing device is low.
【００１９】請求項３に係る消磁装置では、磁性部材に
よって消磁時の起磁力を増大させることができるのみな
らず地磁気等の外部磁界が陰極線管に及ぼす影響を低減
させることもできるので、画像品質の高い陰極線管を実
現することができる。In the degaussing device according to the third aspect, not only the magnetomotive force at the time of degaussing can be increased by the magnetic member but also the effect of an external magnetic field such as terrestrial magnetism on the cathode ray tube can be reduced, so that the image quality can be reduced. And a cathode ray tube having a high density can be realized.
【００２０】請求項４に係る消磁装置では、消磁コイル
の製造コストが銅よりもアルミニウムで低いので、消磁
装置の製造コストが低い。また、複雑な形状の消磁コイ
ルを銅よりもアルミニウムで容易に実現することができ
るので、効率的な消磁を行うことができる。また、製品
アセスメントが改善され、商品の更なる軽量化が図られ
る。In the degaussing device according to the fourth aspect, since the manufacturing cost of the degaussing coil is lower for aluminum than for copper, the manufacturing cost of the degaussing device is low. In addition, since a demagnetizing coil having a complicated shape can be easily realized by using aluminum rather than copper, efficient demagnetization can be performed. Further, the product assessment is improved, and the weight of the product is further reduced.
【図１】本願の発明の一実施形態の消磁装置を備えてい
る陰極線管の斜視図である。FIG. 1 is a perspective view of a cathode ray tube including a degaussing device according to an embodiment of the present invention.
【図２】本願の発明の一従来例の消磁装置を備えている
陰極線管の斜視図である。FIG. 2 is a perspective view of a cathode ray tube including a conventional degaussing device of the present invention.
【図３】一従来例の消磁装置を備えている陰極線管の分
解斜視図である。FIG. 3 is an exploded perspective view of a cathode ray tube including a conventional degaussing device.
２１…消磁装置、２２…磁気遮蔽板（磁性部材）、２４
…消磁コイル21: degaussing device, 22: magnetic shielding plate (magnetic member), 24
... Degaussing coil
───────────────────────────────────────────────────── フロントページの続き (72)発明者 三浦 伸一郎 東京都品川区北品川６丁目７番35号 ソニ ー株式会社内 Ｆターム(参考） 5C060 CM01 CM09 CN01 CN04 JA00 5G301 AA03 AB20 AD10 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shinichiro Miura 6-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 5C060 CM01 CM09 CN01 CN04 JA00 5G301 AA03 AB20 AD10
Claims (4)
いる消磁装置において、前記消磁コイルが銅よりも質量
密度の小さな材料から成っていることを特徴とする消磁
装置。1. A degaussing device in which a degaussing coil is attached to a magnetic member, wherein the degaussing coil is made of a material having a lower mass density than copper.
的に取り付けられていることを特徴とする請求項１記載
の消磁装置。2. The degaussing device according to claim 1, wherein said degaussing coil is fixedly attached to said magnetic member.
であることを特徴とする請求項１記載の消磁装置。3. The degaussing device according to claim 1, wherein said magnetic member is a magnetic shielding plate for a cathode ray tube.
ていることを特徴とする請求項１記載の消磁装置。4. The degaussing device according to claim 1, wherein said degaussing coil is made of aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2750499A JP2000228307A (en) | 1999-02-04 | 1999-02-04 | Demagnetizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2750499A JP2000228307A (en) | 1999-02-04 | 1999-02-04 | Demagnetizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000228307A true JP2000228307A (en) | 2000-08-15 |
Family
ID=12222980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2750499A Pending JP2000228307A (en) | 1999-02-04 | 1999-02-04 | Demagnetizing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000228307A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100766919B1 (en) * | 2001-10-16 | 2007-10-16 | 삼성에스디아이 주식회사 | Cathode ray tube |
-
1999
- 1999-02-04 JP JP2750499A patent/JP2000228307A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100766919B1 (en) * | 2001-10-16 | 2007-10-16 | 삼성에스디아이 주식회사 | Cathode ray tube |
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