JPH0528933A - Core for deflecting yoke and manufacture thereof - Google Patents
Core for deflecting yoke and manufacture thereofInfo
- Publication number
- JPH0528933A JPH0528933A JP18634491A JP18634491A JPH0528933A JP H0528933 A JPH0528933 A JP H0528933A JP 18634491 A JP18634491 A JP 18634491A JP 18634491 A JP18634491 A JP 18634491A JP H0528933 A JPH0528933 A JP H0528933A
- Authority
- JP
- Japan
- Prior art keywords
- core
- diameter end
- deflection yoke
- deflecting yoke
- outer peripheral
- 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.)
- Withdrawn
Links
Landscapes
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、テレビジョンなどに用
いられる受像管の電子ビームを偏向させる偏向ヨークに
用いる偏向ヨーク用コア及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke core used in a deflection yoke for deflecting an electron beam of a picture tube used in a television or the like, and a method for manufacturing the same.
【0002】[0002]
【従来の技術】従来、受像管の電子ビームを磁界によっ
て偏向させるための偏向ヨークに用いられる偏向ヨーク
用コア(以下コアと称する)の磁性材料としては、フェ
ライトが主として使用されている。2. Description of the Related Art Conventionally, ferrite has been mainly used as a magnetic material of a deflection yoke core (hereinafter referred to as a core) used in a deflection yoke for deflecting an electron beam of a picture tube by a magnetic field.
【0003】ところで設計した通りに正確な電子ビーム
を偏向させるためには、設計通りの正確な偏向磁界を発
生させる必要がある。この磁界は前記コアの寸法精度、
特に変形によって変化する。By the way, in order to deflect the electron beam accurately as designed, it is necessary to generate an accurate deflection magnetic field as designed. This magnetic field is due to the dimensional accuracy of the core,
Especially, it changes due to deformation.
【0004】図7は従来のコアの形状を示すもので、こ
のコア11は前記のようなフェライト材料からなり、一
端を小径端部12とし、他端を大径端部13とした円筒
状からなっている。この形状のコア11は、金型を用い
て成型工程で成型された後、焼成工程で焼成されること
により製造される。コア11の周囲には、図示しない水
平偏向コイル及び垂直偏向コイルが巻装されることにな
る。FIG. 7 shows the shape of a conventional core. This core 11 is made of a ferrite material as described above and has a cylindrical shape with one end having a small diameter end 12 and the other end having a large diameter end 13. Has become. The core 11 having this shape is manufactured by molding in a molding process using a mold and then firing in a firing process. A horizontal deflection coil and a vertical deflection coil (not shown) are wound around the core 11.
【0005】図8及び図9は図7のコア11の焼成工程
を説明するものである。予め図7の形状を有するように
成型されたコアの成型体11′は、図8に示すように支
持具20がガイド穴20Aに小径端部12′が下方とな
るように支持された状態で焼成処理が施される。FIG. 8 and FIG. 9 explain the firing process of the core 11 of FIG. As shown in FIG. 8, the core molded body 11 'previously molded to have the shape shown in FIG. 7 is in a state in which the support tool 20 is supported in the guide hole 20A so that the small diameter end 12' faces downward. A firing process is performed.
【0006】図8の焼成工程の初期の段階では、成型体
11′はその外周面14の位置aでガイド穴20Aに接
して支持されている。しかし焼成処理が進行するにつれ
て成型体11′は徐々に収縮されるので、焼成工程の終
期の段階では成型体11′はその自重によって下降する
ので、図9のように外周面14′の前記位置aより上方
の他の位置bでガイド穴20Aに接して支持されるよう
になる。In the initial stage of the firing step of FIG. 8, the molded body 11 'is supported in contact with the guide hole 20A at the position a on the outer peripheral surface 14 thereof. However, since the molded body 11 'gradually shrinks as the firing process progresses, the molded body 11' descends due to its own weight at the final stage of the firing process. Therefore, as shown in FIG. It comes into contact with and is supported by the guide hole 20A at another position b above a.
【0007】このように位置aから位置bに移動すると
きは、焼成処理の進行につれてガイド穴20Aに接触し
ながら徐々に行われる。焼成工程が終了すると図7の形
状のコア11が得られることになる。The movement from the position a to the position b is gradually performed while contacting the guide hole 20A as the firing process progresses. When the firing process is completed, the core 11 having the shape shown in FIG. 7 is obtained.
【0008】[0008]
【発明が解決しようとする課題】ところで従来の偏向ヨ
ーク用コアでは、前記のように製造時の焼成工程におい
て支持具20のガイド穴20Aと接触しながら下降する
ときに、コアに不均一な応力が加わるようになるので、
完成したコアが変形されてしまうという問題がある。By the way, in the conventional deflection yoke core, when the core is lowered while being in contact with the guide hole 20A of the support tool 20 in the firing process during manufacturing as described above, the uneven stress is applied to the core. Will be added, so
There is a problem that the completed core is deformed.
【0009】このため前記のように正確な電子ビームを
偏向させるための条件を満足させることが困難となる。
この変形の対策として従来研削又は選別などを施すこと
が行われているが、歩留低下,コストアップなどにより
十分な成果が得られていない。Therefore, it becomes difficult to satisfy the conditions for deflecting an accurate electron beam as described above.
Conventionally, as a measure against this deformation, grinding or selection has been performed, but sufficient results have not been obtained due to a decrease in yield and an increase in cost.
【0010】本発明は以上のような問題に対処してなさ
れたもので、変形が生じない偏向ヨーク用コア及びその
製造方法を提供することを目的とするものである。The present invention has been made to solve the above problems, and an object of the present invention is to provide a deflection yoke core and a method of manufacturing the same for a deflection yoke.
【0011】[0011]
【課題を解決するための手段】上記目的を達成するため
に本発明の偏向ヨーク用コアは、両端がそれぞれ小径端
部と大径端部とからなる円筒状の偏向ヨーク用コアにお
いて、前記コアの前記両端部を結ぶ方向に沿って延在す
る緩衝用突起部を前記コアの外周面に沿って複数個設け
たことを特徴とするものである。In order to achieve the above object, the deflection yoke core of the present invention is a cylindrical deflection yoke core having opposite ends each having a small diameter end and a large diameter end. A plurality of cushioning projections extending along the direction connecting the both ends are provided along the outer peripheral surface of the core.
【0012】また、本発明の偏向ヨーク用コアの製造方
法は、両端部がそれぞれ小径端部と大径端部とからなる
円筒状の磁性材料を前記両端部を結ぶ方向に沿って延在
する緩衝用突起部を前記コアの外周面に沿って複数個設
けるように成型する工程と、前記磁性材料を前記緩衝用
突起部のみに触れるように支持具によって支持した状態
で焼成する工程とを含むことを特徴とするものである。Further, in the method for manufacturing the deflection yoke core of the present invention, a cylindrical magnetic material having both ends of a small diameter end and a large diameter end is extended along the direction connecting the both ends. A step of molding so as to provide a plurality of cushioning protrusions along the outer peripheral surface of the core; and a step of firing the magnetic material in a state of being supported by a support so as to touch only the cushioning protrusions. It is characterized by that.
【0013】[0013]
【作用】本発明の偏向ヨーク用コアの構成によれば、コ
アの小径端部と大径端部を結ぶ方向に沿って延在する緩
衝用突起部を前記コアの外周面に沿って複数個設けるよ
うにしたので、コア自身に応力が加わらないため変形は
生じない。According to the structure of the deflection yoke core of the present invention, a plurality of buffer protrusions extending along the direction connecting the small diameter end and the large diameter end of the core are provided along the outer peripheral surface of the core. Since the core is provided, no stress is applied to the core itself, so that no deformation occurs.
【0014】また、本発明の偏向ヨーク用コアの製造方
法によれば、前記両端部を結ぶ方向に沿って延在する緩
衝用突起部を前記コアの外周面に沿って複数個設けるよ
うに円筒状の磁性材料を成型した後、この成型体を前記
緩衝用突起部のみに接するように支持具によって支持し
た状態で焼成するようにしたので、焼成の際前記緩衝用
突起部によって応力を緩衝することによりコア自身へ応
力は加わらないため、変形のない偏向ヨーク用コアの製
造方法を提供することができる。Further, according to the method of manufacturing the deflection yoke core of the present invention, the cylinder is formed so as to provide a plurality of cushioning protrusions extending along the direction connecting the both ends along the outer peripheral surface of the core. After molding the magnetic material in the shape of a ring, the molded body is fired in a state of being supported by a supporting tool so as to be in contact only with the buffering protrusions, and therefore the stress is buffered by the buffering protrusions during firing. As a result, no stress is applied to the core itself, so that it is possible to provide a method for manufacturing a deflection yoke core without deformation.
【0015】[0015]
【実施例】以下図面を参照して本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【0016】図1は本発明の偏向ヨーク用コアの実施例
を示す斜視図で、本実施例コア1は例えばフェライト材
料からなり、一端を小径端部2とし、他端を大径端部3
として円筒状からなっている。このコア1のテーパー状
の外周面4には、前記小径端部2と大径端部3とを結ぶ
方向に沿って延在する、複数の緩衝用突起部5(5A,
5B,5C,…)がテーパー状の外周面4に沿って複数
個設けられている。FIG. 1 is a perspective view showing an embodiment of a core for a deflection yoke according to the present invention. The core 1 of the present embodiment is made of, for example, a ferrite material, and one end has a small diameter end portion 2 and the other end has a large diameter end portion 3.
It has a cylindrical shape. On the tapered outer peripheral surface 4 of the core 1, a plurality of buffer protrusions 5 (5A, 5A, 5A, 5A, 5A, 5A) extending along the direction connecting the small diameter end 2 and the large diameter end 3 are formed.
5B, 5C, ...) are provided along the tapered outer peripheral surface 4.
【0017】図2の断面図に示すように、緩衝用突起部
5はテーパー状の外周面4のほぼ中央部分に延在してお
り、この長さ寸法Lはコア1の寸法を後述するように、
焼成時に使用される支持具の寸法によって設定される。
また、図3に示すように一例として緩衝用突起部5の幅
寸法Wは0.3乃至5mm程度に、高さ寸法Hは0.3
乃至3mm程度に、角度θはできるだけ小さく設定され
る。なお、図1において6はコイル巻装用溝を示してい
る。As shown in the sectional view of FIG. 2, the cushioning protrusion 5 extends substantially in the central portion of the tapered outer peripheral surface 4, and the length L is the dimension of the core 1 which will be described later. To
It is set by the dimensions of the support used during firing.
Further, as shown in FIG. 3, as an example, the width dimension W of the buffering protrusion 5 is about 0.3 to 5 mm, and the height dimension H is 0.3.
The angle θ is set to be as small as possible to about 3 mm. In FIG. 1, reference numeral 6 indicates a coil winding groove.
【0018】このような本実施例によれば、コア1の外
周面4に複数の緩衝用突起部5を設けるようにしたの
で、応力はこの緩衝用突起部5によって緩衝されてコア
1自身には加わらないため変形は生じない。従って、電
子ビームを磁界によって偏向させる場合正確な電子ビー
ムを変更させるための条件を満足させることができる。
次に本実施例偏向ヨーク用コアの製造方法を説明する。According to the present embodiment as described above, since the plurality of buffer protrusions 5 are provided on the outer peripheral surface 4 of the core 1, the stress is buffered by the buffer protrusions 5 and the core 1 itself is stressed. Is not added, no deformation occurs. Therefore, when the electron beam is deflected by the magnetic field, it is possible to satisfy the conditions for changing the electron beam accurately.
Next, a method of manufacturing the deflection yoke core according to the present embodiment will be described.
【0019】先ず、図4に示すようにコア1となるフェ
ライト材料を用いて成型体1′を成型する。これには上
型7、中型8、下型9A,9B、枠型10から構成され
る金型を用いて、圧縮成型を行って成型体1′を成型す
る。この場合テーパー状の円周面4′に緩衝用突起部
5′が形成されるような形状の下型9Aを用いて成型を
行う。First, as shown in FIG. 4, a molded body 1'is molded using a ferrite material which will be the core 1. For this, a mold composed of an upper mold 7, a middle mold 8, lower molds 9A and 9B, and a frame mold 10 is used to perform compression molding to mold a molded body 1 '. In this case, molding is performed using the lower mold 9A having a shape such that the buffering projection 5'is formed on the tapered circumferential surface 4 '.
【0020】次にこのようにして得られた成型体1′を
用いて、図5及び図6のように焼成処理を行う。先ず、
成型体1′は図5のようにガイド穴20Aを有する支持
具20を用い、ガイド穴20Aに前記緩衝用突起部5′
の下方の位置(小径端部2′側の位置)Aが接するよう
に挿入して支持させる。Next, the molded body 1'obtained as described above is subjected to firing treatment as shown in FIGS. First,
The molded body 1'uses a support tool 20 having a guide hole 20A as shown in FIG. 5, and the buffer projection 5'is provided in the guide hole 20A.
Is inserted so that the position A (the position on the small-diameter end 2'side) A is in contact with.
【0021】このようにして焼成処理を施すと、焼成処
理が進行するにつれて成型体1′は徐々に収縮されるの
で、徐々に成型体1′は自重により下降する。そして、
図6に示すように、焼成工程の終期の段階では成型体
1′は、緩衝用突起部5′の前記位置Aより上方の位置
(大径端部3′側の位置)Bでガイド穴20Aに接する
ように移動して支持されるようになる。When the firing treatment is carried out in this manner, the molding 1'is gradually contracted as the firing treatment progresses, so that the molding 1'is gradually lowered by its own weight. And
As shown in FIG. 6, at the final stage of the firing step, the molded body 1'is provided with a guide hole 20A at a position B (position on the large diameter end 3'side) B above the position A of the buffer protrusion 5 '. It comes to be supported by moving to contact.
【0022】すなわち、焼成工程においては成型体1′
は初期の段階でも、終期の段階でもガイド穴20Aに接
するのは緩衝用突起部5′のみに維持される。このた
め、焼成工程において支持具20のガイド穴20Aと接
触しながら下降するときに生ずる不均一な応力は、緩衝
用突起部5′によって緩衝されるのでコア1′自身には
加わらない。従って、変形の生じていない偏向ヨーク用
コアを製造することができる。That is, in the firing step, the molded body 1 '
In both the initial stage and the final stage, it is maintained only by the cushioning projection 5'that contacts the guide hole 20A. For this reason, the non-uniform stress generated when descending while being in contact with the guide hole 20A of the support tool 20 in the firing step is buffered by the buffering protrusion 5 ', and thus is not applied to the core 1' itself. Therefore, it is possible to manufacture a deflection yoke core that is not deformed.
【0023】偏向ヨーク用コアの材料はフェライトに限
らず、通常用いられている磁性材料であれば特定のもの
に限らず使用することができる。The material of the deflection yoke core is not limited to ferrite, and any commonly used magnetic material may be used without particular limitation.
【0024】[0024]
【発明の効果】以上述べたように本発明の請求項1の構
成によれば、コアの外周面に複数の緩衝用突起部を設け
るようにしたので、コア自身に変形が生じない偏向ヨー
ク用コアを提供することができる。As described above, according to the structure of the first aspect of the present invention, since the plurality of cushioning protrusions are provided on the outer peripheral surface of the core, the core itself is not deformed. A core can be provided.
【0025】また、本発明の請求項2の構成によれば、
コア材料をこの外周面に複数の緩衝用突起部を設けるよ
うに成型した後、この成型体を緩衝用突起部のみに触れ
るように支持した状態で焼成するようにしたので、焼成
時生じる応力を緩衝用突起部により緩衝することができ
るため、変形の生じない偏向ヨーク用コアの製造方法を
提供することができる。According to the second aspect of the present invention,
After molding the core material so as to provide a plurality of cushioning projections on the outer peripheral surface, the molded body was baked while being supported so that only the cushioning projections were touched. Since it can be buffered by the buffering protrusion, it is possible to provide a method for manufacturing a deflection yoke core that does not deform.
【図1】本発明の偏向ヨーク用コアの実施例を示す斜視
図である。FIG. 1 is a perspective view showing an embodiment of a deflection yoke core of the present invention.
【図2】図1のA−A線に沿う断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図3】図1のB−B線に沿う断面図である。3 is a cross-sectional view taken along the line BB of FIG.
【図4】本発明の偏向ヨーク用コアの製造方法の成型工
程を説明する断面図である。FIG. 4 is a cross-sectional view illustrating a molding step of the method for manufacturing the deflection yoke core of the present invention.
【図5】本発明の製造方法の焼成工程を示す断面図であ
る。FIG. 5 is a cross-sectional view showing a firing step of the manufacturing method of the present invention.
【図6】本発明の製造方法の焼成工程を示す断面図であ
る。FIG. 6 is a cross-sectional view showing a firing step of the manufacturing method of the present invention.
【図7】従来の偏向ヨーク用コアを示す断面図である。FIG. 7 is a cross-sectional view showing a conventional deflection yoke core.
【図8】従来の製造方法を示す断面図である。FIG. 8 is a cross-sectional view showing a conventional manufacturing method.
【図9】従来の製造方法を示す断面図である。FIG. 9 is a cross-sectional view showing a conventional manufacturing method.
1 偏向ヨーク用コア 2 小径端部 3 大径端部 4 外周面 5 緩衝用突起部 20 支持具 20A ガイド穴 1 Core for deflection yoke 2 Small diameter end 3 Large diameter end 4 outer peripheral surface 5 Buffer projection 20 Support 20A guide hole
Claims (2)
らなる円筒状の偏向ヨーク用コアにおいて、前記コアの
前記両端部を結ぶ方向に沿って延在する緩衝用突起部を
前記コアの外周面に沿って複数個設けたことを特徴とす
る偏向ヨーク用コア。1. A cylindrical deflection yoke core having opposite ends, each having a small diameter end and a large diameter end, and a buffer protrusion extending along a direction connecting the both ends of the core. A plurality of deflection yoke cores are provided along the outer peripheral surface of the core.
からなる円筒状の磁性材料を前記両端部を結ぶ方向に沿
って延在する緩衝用突起部を前記コアの外周面に沿って
複数個設けるように成型する工程と、前記磁性材料を前
記緩衝用突起部のみに触れるように支持具によって支持
した状態で焼成する工程とを含むことを特徴とする偏向
ヨーク用コアの製造方法。2. A buffering protrusion extending along a direction connecting the both ends of a cylindrical magnetic material having a small-diameter end and a large-diameter end at both ends along an outer peripheral surface of the core. And a step of firing the magnetic material in a state of being supported by a support so that only the buffer protrusions are touched, and a step of molding the deflection yoke core. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18634491A JPH0528933A (en) | 1991-07-25 | 1991-07-25 | Core for deflecting yoke and manufacture thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18634491A JPH0528933A (en) | 1991-07-25 | 1991-07-25 | Core for deflecting yoke and manufacture thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0528933A true JPH0528933A (en) | 1993-02-05 |
Family
ID=16186718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18634491A Withdrawn JPH0528933A (en) | 1991-07-25 | 1991-07-25 | Core for deflecting yoke and manufacture thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0528933A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040009200A (en) * | 2002-07-22 | 2004-01-31 | 삼성전기주식회사 | Deflection yoke |
-
1991
- 1991-07-25 JP JP18634491A patent/JPH0528933A/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20040009200A (en) * | 2002-07-22 | 2004-01-31 | 삼성전기주식회사 | Deflection yoke |
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