JPH0379814B2 - - Google Patents
Info
- Publication number
- JPH0379814B2 JPH0379814B2 JP57094858A JP9485882A JPH0379814B2 JP H0379814 B2 JPH0379814 B2 JP H0379814B2 JP 57094858 A JP57094858 A JP 57094858A JP 9485882 A JP9485882 A JP 9485882A JP H0379814 B2 JPH0379814 B2 JP H0379814B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- cylindrical
- electron gun
- cylindrical part
- radius
- 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
- 238000000465 moulding Methods 0.000 description 4
- 238000010409 ironing Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
- H01J29/503—Three or more guns, the axes of which lay in a common plane
Description
【発明の詳細な説明】
本発明は電子銃用電極、特にカラーブラウン管
のインライン式電子銃用の主レンズ電極に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrode for an electron gun, and particularly to a main lens electrode for an in-line electron gun of a color cathode ray tube.
従来、かかる主レンズ電極を一枚の平板に張り
出し加工、しごき加工およびバーリング加工など
を行なつて第１図に示すように３個の円筒部１
ａ，１ｂ，１ｃを有するレンズ部２ａ，２ｂ，２
ｃをインライン状に近接して一体成形して電極３
を形成することが行なわれている。しかしなが
ら、従来の方法によつて製作された主レンズ電極
は、各円筒部間の近接部分と、主レンズ電極の短
辺側の円筒部つけね部分と、主レンズ電極の長辺
側の円筒部つけね部分とでは各々張り出し加工お
よびしごき加工を受ける際の歪量が異なるので、
前記各部分のつけ根の板厚が円周上において異な
り、円筒部のつけ根部の真円度が低下し、フオー
カス特性が劣化するという欠点があつた。 Conventionally, such a main lens electrode is formed into a single flat plate by stretching, ironing, burring, etc. to form three cylindrical parts 1 as shown in FIG.
Lens parts 2a, 2b, 2 having a, 1b, 1c
The electrode 3 is formed by integrally molding the electrodes c in close proximity inline.
is being formed. However, the main lens electrode manufactured by the conventional method has three parts: a proximal part between each cylindrical part, a cylindrical base part on the short side of the main lens electrode, and a cylindrical part on the long side of the main lens electrode. Since the amount of strain when undergoing stretching and ironing is different for the base part,
There was a drawback that the plate thickness at the base of each portion differed on the circumference, reducing the roundness of the base of the cylindrical portion and deteriorating focus characteristics.
このような欠点を解消するため、本願出願人は
円筒部のつけ根の開口部にその開口端に向けて内
径が拡大したテーパ部を形成した電子銃電極を出
願済みである。これにより、円筒部の真円度が著
しく向上した。しかし、この方法によつて製作さ
れた電極は、試作の結果、せいぜい30μｍ前後の
真円度を出すのが限界であり、常に中央の円筒部
のテーパ部真円度が電極の短辺方向に楕円形状に
なることが判明した。これは円筒部近接部とその
他の部分では素材のスプリングバツク量が異なる
ためであると思われる。 In order to eliminate such drawbacks, the applicant of the present application has applied for an electron gun electrode in which a tapered part is formed in the opening at the base of the cylindrical part, the inner diameter of which increases toward the opening end. This significantly improved the roundness of the cylindrical portion. However, as a result of trial production, electrodes manufactured by this method have a limit of roundness of around 30 μm at most, and the roundness of the tapered part of the central cylindrical part always changes in the direction of the short side of the electrode. It turned out to be elliptical in shape. This is thought to be due to the difference in the amount of spring back of the material in the vicinity of the cylindrical part and in other parts.
本発明の目的は、円筒部つけ根の開口部の真円
度の向上が図れ、フオーカス特性の優れた電子銃
用電極を提供することにある。 An object of the present invention is to provide an electrode for an electron gun that can improve the circularity of the opening at the base of a cylindrical portion and has excellent focus characteristics.
以下、本発明を図示の実施例により説明する。
第２図は本発明になる電子銃用電極の一実施例を
示し、ａは平面図、ｂは断面図、第３図は中央円
筒部の断面を示し、ａは第２図ａのＡ−Ａ線断面
拡大図、ｂは第２図ａのＢ−Ｂ線断面拡大図であ
る。なお、第１図と同じまたは相当部分には同一
符号を付して説明する。第１図に示すように形成
された電極３に、第２図および第３図に示すよう
にプレス成形加工によつて円筒部１ａ〜１ｃのつ
け根の内周開口部にテーパ４を成形すると共に、
円筒部１ａ〜１ｃのつけ根の外周Ｒ部を下記する
ように各領域でそれぞれ異なる半径とする形状に
成形して電極５を形成してなる。前記円筒部１ａ
〜１ｃのつけ根の外周Ｒ部は、３個の円筒部１ａ
〜１ｃの長辺側の領域部分6aを半径R1に、両側
の円筒部１ａ，１ｃの短辺側の領域部分6bを半
径R2に、中央の円筒部１ｂの短辺側（他の円筒
部１ａ，１ｃとの近接側）のほぼ90度の範囲の領
域部分６ｃを半径R3に、かつ各領域部分６ａ，
６ｂ，６ｃの半径R1，R2，R3がR1＜R2＜R3を満
足するように形成されている。 Hereinafter, the present invention will be explained with reference to illustrated embodiments.
FIG. 2 shows an embodiment of the electron gun electrode according to the present invention, a is a plan view, b is a sectional view, FIG. 3 is a cross section of the central cylindrical part, and a is A--A in FIG. 2a. An enlarged cross-sectional view taken along the line A, and b is an enlarged cross-sectional view taken along the line B--B of FIG. 2a. Note that the same or equivalent parts as in FIG. 1 will be described with the same reference numerals. In the electrode 3 formed as shown in FIG. 1, a taper 4 is formed at the inner peripheral opening of the base of the cylindrical portions 1a to 1c by press molding as shown in FIGS. 2 and 3. ,
The electrode 5 is formed by molding the outer periphery R portion of the base of the cylindrical portions 1a to 1c into a shape having a different radius in each region as described below. Said cylindrical part 1a
The outer periphery R of the base of ~1c has three cylindrical parts 1a
The area 6a on the long side of ~1c has a radius of R 1 , the area 6b on the short side of both cylindrical parts 1a and 1c has a radius of R2 , and the short side of the central cylindrical part 1b (other cylinders) The area portion 6c in the range of approximately 90 degrees on the side adjacent to the portions 1a, 1c) has a radius of R 3 , and each area portion 6a,
The radii R 1 , R 2 , and R 3 of 6b and 6c are formed to satisfy R 1 <R 2 <R 3 .
今、一例として、ブラウン管のネツク部が22mm
φ用の電極で、各部寸法は、円筒部１ａ〜１ｃの
内径が3.9mmφ、円筒部１ａ〜１ｃのピツチが
4.75mm、素材板厚が0.33mm、円筒部１ａ〜１ｃの
高さが2.1mm、円筒部１ａ〜１ｃの肉厚が0.15mm
の電極について、R1＝0.05mm、R2＝0.2mm、R3＝
0.35mmになるように成形したところ、円筒部１ａ
〜１ｃの真円度は15〜20μｍ以内になつた。 Now, as an example, the neck part of a cathode ray tube is 22mm.
It is an electrode for φ, and the dimensions of each part are that the inner diameter of the cylindrical parts 1a to 1c is 3.9 mmφ, and the pitch of the cylindrical parts 1a to 1c is 3.9 mmφ.
4.75mm, material plate thickness is 0.33mm, height of cylindrical parts 1a to 1c is 2.1mm, wall thickness of cylindrical parts 1a to 1c is 0.15mm
For the electrodes, R 1 = 0.05mm, R 2 = 0.2mm, R 3 =
When molded to have a diameter of 0.35 mm, the cylindrical part 1a
The roundness of ~1c was within 15-20 μm.
このように、中央の円筒部１ｂのつけ根の外周
Ｒ部は、短辺側の領域部分６ｃの半径R3を長辺
側の領域部分６ａの半径R1より大きく形成して
なるので、従来のように全領域が均一のほぼ0.2
mmの半径に形成されているものに比べ、テーパ４
を形成するときの素材のスプリングバツク量が領
域部分６ｃにおいて小さくなり、真円度が向上す
る。 In this way, the outer periphery R of the root of the central cylindrical portion 1b is formed such that the radius R 3 of the region 6c on the short side is larger than the radius R 1 of the region 6a on the long side. so that the whole area is uniform approximately 0.2
Compared to those formed with a radius of mm, the taper is 4
The amount of spring back of the material when forming is reduced in the region 6c, and the roundness is improved.
第４図は第２図に示す電子銃用電極５を成形す
るための金型構造の一実施例を示す。テーパ４は
ポンチ１０に形成されたテーパ部１１によつて成
形される。また円筒部１ａ〜１ｃのつけ根の外周
Ｒ部の各領域部分６ａ〜６ｃの曲率半径R1、R2、
R3は、ダイ１２の下端部の上記各領域部分６ａ
〜６ｃに相当する部分に、R1＜R2＜R3を満足す
るように形成されたＲ部１３によつて成形され
る。なお、１４は下型ノツクアウト、１５は上型
ノツクアウト、１６は下型スプリング、１７は上
型スプリングを示す。 FIG. 4 shows an embodiment of a mold structure for molding the electron gun electrode 5 shown in FIG. The taper 4 is formed by a taper portion 11 formed on the punch 10. Furthermore, the radius of curvature R 1 , R 2 ,
R 3 is the area portion 6a at the lower end of the die 12.
-6c is formed by an R portion 13 formed so as to satisfy R 1 <R 2 <R 3 . Note that 14 represents a lower mold knockout, 15 represents an upper mold knockout, 16 represents a lower mold spring, and 17 represents an upper mold spring.
なお、上記実施例においては、両側の円筒部１
ａ，１ｃにおいてもつけ根の外周Ｒ部を長辺側と
短辺側で異なるように形成したが、少なくとも中
央部１ｂにおいて異なるようにすれば従来より優
れた効果が得られる。 In addition, in the above embodiment, the cylindrical portions 1 on both sides
In case a and 1c, the outer periphery R portion of the root is formed to be different on the long side and the short side, but if it is made different at least on the center portion 1b, a better effect than the conventional one can be obtained.
以上の説明から明らかな如く、本発明によれ
ば、中央部の円筒部のつけ根の外周Ｒ部は短辺側
を長辺側より大きく形成してなるので、円筒部つ
け根の開口部の真円度が向上し、フオーカス特性
の優れた電子銃用電極が得られる。 As is clear from the above description, according to the present invention, the short side of the outer periphery R of the base of the central cylindrical part is formed larger than the long side, so that the opening of the base of the cylindrical part is perfectly circular. An electrode for an electron gun with improved focus characteristics can be obtained.
第１図は従来の電子銃用電極を示し、ａは平面
図、ｂは断面図、第２図は本発明になる電子銃電
極の一実施例を示し、ａは平面図、ｂは断面図、
第３図は中央円筒部の断面を示し、ａは第２図ａ
のＡ−Ａ線断面拡大図、ｂは第２図ａのＢ−Ｂ線
断面拡大図、第４図は第２図に示す電子銃用電極
を成形するため金型構造の一実施例を示す断面図
である。
１ａ，１ｂ，１ｃ……円筒部、５……電極、６
ａ……３個の円筒部の長辺側の領域部分、６ｂ…
…両側の円筒部の短辺側の領域部分、６ｃ……中
央の円筒部の短辺側の領域部分。
FIG. 1 shows a conventional electron gun electrode, in which a is a plan view and b is a cross-sectional view. FIG. 2 is an embodiment of the electron gun electrode according to the present invention, in which a is a plan view and b is a cross-sectional view. ,
Figure 3 shows the cross section of the central cylindrical part, and a is Figure 2a.
b is an enlarged cross-sectional view taken along line A-A of FIG. 2a, and FIG. FIG. 1a, 1b, 1c... Cylindrical portion, 5... Electrode, 6
a... Area portion on the long side of the three cylindrical parts, 6b...
...A region portion on the short side side of the cylindrical portions on both sides, 6c…A region portion on the short side side of the central cylindrical portion.
Claims (1)
成形した電子銃用電極において、前記円筒部のつ
け根の内周開口部にテーパを成形すると共に、中
央の円筒部のつけ根の外周Ｒ部の曲率半径を前記
電極の短辺側の領域部分が前記電極の長辺側の領
域部分より大きくなるように形成してなる電子銃
用電極。1. In an electron gun electrode in which three cylindrical parts are integrally molded in close proximity to each other in line, a taper is formed at the inner circumferential opening at the root of the cylindrical part, and a taper is formed at the outer periphery R of the root of the central cylindrical part. An electrode for an electron gun, wherein the radius of curvature is formed so that a region on the short side of the electrode is larger than a region on the long side of the electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9485882A JPS58214254A (en) | 1982-06-04 | 1982-06-04 | Electrode for electron gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9485882A JPS58214254A (en) | 1982-06-04 | 1982-06-04 | Electrode for electron gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58214254A JPS58214254A (en) | 1983-12-13 |
| JPH0379814B2 true JPH0379814B2 (en) | 1991-12-20 |
Family
ID=14121725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9485882A Granted JPS58214254A (en) | 1982-06-04 | 1982-06-04 | Electrode for electron gun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58214254A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56116244A (en) * | 1980-02-18 | 1981-09-11 | Hitachi Ltd | Manufacturing method for electrode for electron gun |
-
1982
- 1982-06-04 JP JP9485882A patent/JPS58214254A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56116244A (en) * | 1980-02-18 | 1981-09-11 | Hitachi Ltd | Manufacturing method for electrode for electron gun |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58214254A (en) | 1983-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4429926A (en) | Thin-walled bearing bushings manufactured by a deep drawing process | |
| US6701603B2 (en) | Method of manufacturing yoke of electric rotating machine | |
| GB2142184A (en) | Electron gun for color picture tube | |
| JPH0379814B2 (en) | ||
| US3967639A (en) | Tire valve core | |
| US4044277A (en) | Mechanically assembled base for electric lamps | |
| JPS5911176B2 (en) | Electrode for electron gun | |
| JPH0443373B2 (en) | ||
| JPS6138733A (en) | Production of ball stud | |
| EP0710780B1 (en) | Installation ring for mounting pressurized fluid buffer device and fabrication method therefor | |
| JP4738956B2 (en) | Molding method for vehicle wheel | |
| JPS6149778B2 (en) | ||
| JP4131830B2 (en) | cap | |
| JPS6329779B2 (en) | ||
| JP2600942Y2 (en) | Shell type full roller bearing | |
| CN211195047U (en) | Upper punch and tabletting device with same | |
| JPS6236775B2 (en) | ||
| JPS5915775Y2 (en) | roller clutch | |
| US1325875A (en) | Electbic-iamp-socket cap | |
| JPH0777217A (en) | Manufacture of thrust ball bearing and race thereof | |
| JPS6120629A (en) | Burring method | |
| JPH05139320A (en) | Steering wheel core metal | |
| JPS6121372Y2 (en) | ||
| JPH05671A (en) | Core bar of steering wheel | |
| JP4345529B2 (en) | Manufacturing method of outer ring of shell type full complement roller bearing |