JPH0248928U - - Google Patents
Info
- Publication number
- JPH0248928U JPH0248928U JP12819688U JP12819688U JPH0248928U JP H0248928 U JPH0248928 U JP H0248928U JP 12819688 U JP12819688 U JP 12819688U JP 12819688 U JP12819688 U JP 12819688U JP H0248928 U JPH0248928 U JP H0248928U
- Authority
- JP
- Japan
- Prior art keywords
- blade
- tip
- blades
- diaphragm device
- pedestal
- 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
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
Landscapes
- Diaphragms For Cameras (AREA)
Description
第１図は本考案の実施例に係る虹彩絞り装置の
分解斜視図である。第２図は第１図の虹彩絞り装
置の外観図である。第３図は第１図の虹彩絞り装
置の小絞り状態の平面図である。第４図は第１図
の虹彩絞り装置の開放状態の概略平面図である。
第５図は従来の絞り装置の小絞り状態の平面図で
ある。第６図は第５図の絞り装置の開放状態の概
略平面図である。
１０…台座、１１…サーボモータ、１２…取付
片、１９…駆動リング、２１…駆動ピン、２４…
嵌合リング、３２…固定ピン、３５〜４０…羽根
、３６ａ…先端側延展片、４０ａ…基端側延展片
。
FIG. 1 is an exploded perspective view of an iris diaphragm device according to an embodiment of the present invention. FIG. 2 is an external view of the iris diaphragm device shown in FIG. 1. FIG. 3 is a plan view of the iris diaphragm device of FIG. 1 in a small aperture state. FIG. 4 is a schematic plan view of the iris diaphragm device of FIG. 1 in an open state.
FIG. 5 is a plan view of a conventional aperture device in a small aperture state. FIG. 6 is a schematic plan view of the diaphragm device of FIG. 5 in an open state. DESCRIPTION OF SYMBOLS 10... Pedestal, 11... Servo motor, 12... Mounting piece, 19... Drive ring, 21... Drive pin, 24...
Fitting ring, 32...Fixing pin, 35-40...Blade, 36a...Distal side extension piece, 40a...Proximal side extension piece.
Claims (1)
台座に３枚以上の羽根を回動自在に軸着し、これ
らの羽根を開閉して開口径の調節を行うとともに
、１枚の羽根の先端部に他の羽根の下面に入り込
む先端側延展部を形成して羽根の重なり順序を一
定に維持するようにした虹彩絞り装置において、
前記他の羽根の軸着部側に基端側延展部を形成し
、羽根の全開時には前記１枚の羽根の先端側延展
部を前記基端側延展部で覆うようにするとともに
、羽根の絞り切り時には前記基端側延展部が台座
の外周に突設された羽根駆動手段の取り付け座の
輪郭内に突出されるようにしたことを特徴とする
虹彩絞り装置。 (2) 前記先端側延展部の長さは、羽根の絞り切
り状態において先端側延展部の先端が台座に形成
した開口の径内に留まる長さであることを特徴と
する実用新案登録請求の範囲第１項記載の虹彩絞
り装置。[Scope of Claim for Utility Model Registration] (1) Three or more blades are rotatably attached to an annular pedestal with an aperture through which light can pass, and the aperture diameter is adjusted by opening and closing these blades. In an iris diaphragm device, in which the blades are formed with a tip-side extension portion that enters the lower surface of another blade at the tip of one blade to maintain a constant overlapping order of the blades,
A proximal extending portion is formed on the shaft attachment portion side of the other blade, and when the blade is fully opened, the distal end extending portion of the one blade is covered by the proximal extending portion, and the aperture of the blade is An iris iris diaphragm device characterized in that, when cutting, the proximal end-side extended portion projects into the outline of a mounting seat of a blade driving means protruding from the outer periphery of the pedestal. (2) The length of the tip-side extended portion is such that the tip of the tip-side extended portion remains within the diameter of an opening formed in the pedestal when the blade is in a drawn-off state. The iris diaphragm device according to scope 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12819688U JPH0248928U (en) | 1988-09-30 | 1988-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12819688U JPH0248928U (en) | 1988-09-30 | 1988-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0248928U true JPH0248928U (en) | 1990-04-05 |
Family
ID=31381305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12819688U Pending JPH0248928U (en) | 1988-09-30 | 1988-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0248928U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003005248A (en) * | 2001-06-25 | 2003-01-08 | Canon Inc | Iris-type light quantity adjusting device, lens barrel and photographing device |
| US9007671B2 (en) | 2010-08-23 | 2015-04-14 | Canon Denshi Kabushiki Kaisha | Light-quantity control apparatus and optical apparatus |
| US9152013B2 (en) | 2012-08-24 | 2015-10-06 | Canon Denshi Kabushiki Kaisha | Light-quantity control apparatus and optical apparatus |
| JP2017187730A (en) * | 2016-03-31 | 2017-10-12 | キヤノン電子株式会社 | Light quantity adjustment device and optical apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61256333A (en) * | 1985-05-10 | 1986-11-13 | Matsushita Electric Ind Co Ltd | lens aperture device |
-
1988
- 1988-09-30 JP JP12819688U patent/JPH0248928U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61256333A (en) * | 1985-05-10 | 1986-11-13 | Matsushita Electric Ind Co Ltd | lens aperture device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003005248A (en) * | 2001-06-25 | 2003-01-08 | Canon Inc | Iris-type light quantity adjusting device, lens barrel and photographing device |
| US9007671B2 (en) | 2010-08-23 | 2015-04-14 | Canon Denshi Kabushiki Kaisha | Light-quantity control apparatus and optical apparatus |
| US9152013B2 (en) | 2012-08-24 | 2015-10-06 | Canon Denshi Kabushiki Kaisha | Light-quantity control apparatus and optical apparatus |
| JP2017187730A (en) * | 2016-03-31 | 2017-10-12 | キヤノン電子株式会社 | Light quantity adjustment device and optical apparatus |
| US10884316B2 (en) | 2016-03-31 | 2021-01-05 | Canon Denshi Kabushiki Kaisha | Light amount adjusting device and optical device |