JPS6246435U - - Google Patents
Info
- Publication number
- JPS6246435U JPS6246435U JP13728085U JP13728085U JPS6246435U JP S6246435 U JPS6246435 U JP S6246435U JP 13728085 U JP13728085 U JP 13728085U JP 13728085 U JP13728085 U JP 13728085U JP S6246435 U JPS6246435 U JP S6246435U
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- aperture
- base
- magnet
- coil
- 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
- 230000004907 flux Effects 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims 5
- 238000013459 approach Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Diaphragms For Cameras (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Description
第１図乃至第５図は先行技術を説明するもので
、第１図は絞り装置の概要を示す斜視図、第２図
はその駆動部概略断面図、第３図は磁束密度の状
態を説明する駆動部の部分拡大図、第４図はその
磁束密度の特性図、第５図は可動部材に生起する
回転力の状態を示す特性図である。第６図乃至第
１１図は本考案の実施例を示すもので、第６図は
本考案に係わる絞り装置の分解斜視図、第７図は
第６図に全体記号で示す駆動部材の分解斜視図
、第８図はその駆動部概略断面図、第９図ａ，ｂ
は可動部材の左右のコイルに関与する磁場の磁束
密度状態を示す特性図、第１０図は可動部材に生
起する回転力の状態を示す特性図である。
Figures 1 to 5 explain the prior art, with Figure 1 being a perspective view showing an overview of the aperture device, Figure 2 being a schematic sectional view of its drive section, and Figure 3 explaining the state of magnetic flux density. FIG. 4 is a characteristic diagram of its magnetic flux density, and FIG. 5 is a characteristic diagram showing the state of rotational force generated in the movable member. 6 to 11 show embodiments of the present invention. FIG. 6 is an exploded perspective view of the throttle device according to the invention, and FIG. 7 is an exploded perspective view of the drive member shown by the general symbol in FIG. 6. Figure 8 is a schematic sectional view of the drive part, Figure 9 a, b
10 is a characteristic diagram showing the magnetic flux density state of the magnetic field involved in the left and right coils of the movable member, and FIG. 10 is a characteristic diagram showing the state of the rotational force generated in the movable member.
Claims (1)
れた絞り羽根を開閉制御する駆動装置を、前記光
軸開口の周りの基盤上で光軸方向に揺動自在に軸
承され、かつその軸承部と異なつた左右の頂点部
にコイルを有する可動部材と、このコイルに対向
し前記基盤上の光軸開口周りに設けられた磁石と
、前記コイルを介し前記磁石に対向し該磁石と磁
気的ループを形成したヨークとから構成した絞り
装置に於いて、 上記光軸方向に揺動するコイルが基盤側に近づ
くに連れ該コイルに作用する磁束密度が大きくな
るように上記ヨークと磁石との間隔を狭くしたこ
とを特徴とするカメラ用絞り装置。[Scope of Claim for Utility Model Registration] A driving device for controlling the opening and closing of aperture blades that are freely openable and closable in an optical axis aperture provided on a base, is swung in the optical axis direction on a base around the optical axis aperture. a movable member that is freely supported on its shaft and has coils at left and right apexes different from the shaft bearings; a magnet that faces the coil and is provided around the optical axis opening on the base; In an aperture device composed of a yoke that faces the magnet and forms a magnetic loop, the magnetic flux density acting on the coil that swings in the optical axis direction increases as the coil approaches the base. An aperture device for a camera, characterized in that the distance between the yoke and the magnet is narrowed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13728085U JPH0228503Y2 (en) | 1985-09-07 | 1985-09-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13728085U JPH0228503Y2 (en) | 1985-09-07 | 1985-09-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6246435U true JPS6246435U (en) | 1987-03-20 |
| JPH0228503Y2 JPH0228503Y2 (en) | 1990-07-31 |
Family
ID=31041186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13728085U Expired JPH0228503Y2 (en) | 1985-09-07 | 1985-09-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0228503Y2 (en) |
-
1985
- 1985-09-07 JP JP13728085U patent/JPH0228503Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0228503Y2 (en) | 1990-07-31 |
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