JPH0249054U - - Google Patents
Info
- Publication number
- JPH0249054U JPH0249054U JP12796088U JP12796088U JPH0249054U JP H0249054 U JPH0249054 U JP H0249054U JP 12796088 U JP12796088 U JP 12796088U JP 12796088 U JP12796088 U JP 12796088U JP H0249054 U JPH0249054 U JP H0249054U
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- ferromagnetic material
- hollow
- permanent magnets
- shape
- 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
- 239000003302 ferromagnetic material Substances 0.000 claims 2
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 229910000828 alnico Inorganic materials 0.000 claims 1
- 230000005291 magnetic effect Effects 0.000 claims 1
Description
第１図および第２図は各々本考案の実施例を示
す要部正面図および要部縦断面図、第３図は従来
の例を示す要部縦断面図である。
１：永久磁石、２：ヨーク、２ａ：溝。
FIGS. 1 and 2 are a front view and a vertical cross-sectional view of a main part showing an embodiment of the present invention, respectively, and FIG. 3 is a vertical cross-sectional view of a main part showing a conventional example. 1: Permanent magnet, 2: Yoke, 2a: Groove.
Claims (1)
て両端面に磁極を設け中空円筒形に形成してなる
２個の永久磁石を異極を対向させて配設し、強磁
性材料により中空円板状に形成したヨークを介し
て前記永久磁石を同軸上に連結し、一方の永久磁
石の他の端面に強磁性材料により中空円板状に形
成したヨークを固着すると共に、これらのヨーク
に円周方向を分断するような溝を設け、他方の永
久磁石の内側および端部外方に２個のコイルを同
軸上に設けたことを特徴とするフオーカスマグネ
ツト。 Two permanent magnets made of alnico magnet alloy, magnetized in the axial direction and formed into a hollow cylindrical shape with magnetic poles on both end faces, are arranged with different poles facing each other, and a hollow disc is made of a ferromagnetic material. The permanent magnets are coaxially connected through yokes formed in a shape, and a yoke formed in a hollow disk shape made of a ferromagnetic material is fixed to the other end face of one permanent magnet. A focus magnet characterized in that a groove is provided to divide the direction, and two coils are coaxially provided inside the other permanent magnet and outside the end thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988127960U JPH0720832Y2 (en) | 1988-09-29 | 1988-09-29 | Focus magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988127960U JPH0720832Y2 (en) | 1988-09-29 | 1988-09-29 | Focus magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0249054U true JPH0249054U (en) | 1990-04-05 |
| JPH0720832Y2 JPH0720832Y2 (en) | 1995-05-15 |
Family
ID=31380859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988127960U Expired - Lifetime JPH0720832Y2 (en) | 1988-09-29 | 1988-09-29 | Focus magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720832Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57199154A (en) * | 1981-06-03 | 1982-12-07 | Sony Corp | Electromagnetic focusing device for cathode-ray tube |
| JPS62100673U (en) * | 1985-12-16 | 1987-06-26 | ||
| JPS62290048A (en) * | 1986-05-01 | 1987-12-16 | Hitachi Metals Ltd | Forcus magnet |
-
1988
- 1988-09-29 JP JP1988127960U patent/JPH0720832Y2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57199154A (en) * | 1981-06-03 | 1982-12-07 | Sony Corp | Electromagnetic focusing device for cathode-ray tube |
| JPS62100673U (en) * | 1985-12-16 | 1987-06-26 | ||
| JPS62290048A (en) * | 1986-05-01 | 1987-12-16 | Hitachi Metals Ltd | Forcus magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0720832Y2 (en) | 1995-05-15 |
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