JPH0356914U - - Google Patents
Info
- Publication number
- JPH0356914U JPH0356914U JP11753889U JP11753889U JPH0356914U JP H0356914 U JPH0356914 U JP H0356914U JP 11753889 U JP11753889 U JP 11753889U JP 11753889 U JP11753889 U JP 11753889U JP H0356914 U JPH0356914 U JP H0356914U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lever
- shutter blade
- position detection
- cam
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
Description
第１図及び第２図は本考案によるズームレンズ
用シヤツターのレンズ繰り出し機構の一実施例の
正面図及び断面図、第３図及び第４図は夫々上記
実施例の作動状態を示す要部平面図、第５図は上
記実施例におけるレンズ繰り出し用カムに作用す
る力の変化を示す図、第６図は従来例におけるレ
ンズ繰り出し用カムに作用する力の変化を示す図
である。
１……前枠、２……基板、３……ガイド軸、４
……ズーム環、５……ステツピングモータ、６…
…ピニオン、７……伝達ギヤ群、８……レンズ繰
り出し用カム、９……ストツパーダボ、１０……
ガイド軸、１１……後レンズ筒、１２……バネ、
１３……前レンズ筒、１４……焦点調整ピン、１
６……アクチユエータ、１７……シヤツター羽根
開閉レバー、１８，１９……シヤツター羽根、２
０……光検出素子、２１……レンズ位置検出レバ
ー、２２……バネ。
1 and 2 are a front view and a sectional view of an embodiment of the lens feeding mechanism of a zoom lens shutter according to the present invention, and FIGS. 3 and 4 are plane views of essential parts showing the operating state of the above embodiment, respectively. 5 are diagrams showing changes in the force acting on the lens feeding cam in the above embodiment, and FIG. 6 is a diagram showing changes in the force acting on the lens feeding cam in the conventional example. 1... Front frame, 2... Board, 3... Guide shaft, 4
...Zoom ring, 5...Stepping motor, 6...
...Pinion, 7...Transmission gear group, 8...Cam for feeding out lens, 9...Stopper dowel, 10...
Guide shaft, 11... Rear lens barrel, 12... Spring,
13...Front lens barrel, 14...Focus adjustment pin, 1
6... Actuator, 17... Shutter blade opening/closing lever, 18, 19... Shutter blade, 2
0...Photodetection element, 21...Lens position detection lever, 22...Spring.
Claims (1)
しめられるレンズ繰り出し用カムと、該レンズ繰
り出し用カムが若干レンズ繰り出し方向に回動し
た時それに追従回転してシヤツター羽根開閉レバ
ーの動きを許す状態となるレンズ位置検出レバー
と、前記シヤツター羽根開閉レバーによりシヤツ
ター羽根が前記ホームポジシヨンに対応する位置
から若干閉鎖方向に動いた時スタート位置検出信
号を発生する光検出素子と、スタート位置から測
定手段により測定されたカメラと被写体間の距離
に対応するパルス分駆動せしめられて前記レンズ
繰り出し用カムを回動せしめるステツピングモー
タとを備えたズームレンズ用シヤツターのレンズ
繰り出し機構において、上記レンズ位置検出レバ
ーをレンズ繰り出し方向に追従回転する方向に付
勢するバネを設けたことを特徴とするレンズ繰り
出し機構。 A lens advancing cam that is stopped at the home position by a stopper, and a lens position detection system that, when the lens advancing cam slightly rotates in the lens extending direction, rotates to follow it and allows movement of the shutter blade opening/closing lever. a lever, a photodetection element that generates a start position detection signal when the shutter blade moves slightly in the closing direction from the position corresponding to the home position by the shutter blade opening/closing lever, and a camera that detects the start position by the measuring means. and a stepping motor driven by a pulse amount corresponding to the distance between objects to rotate the lens extending cam, the lens position detection lever is moved in the lens extending direction. A lens extending mechanism characterized by being provided with a spring that biases the lens in the direction of follow-up rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11753889U JP2505431Y2 (en) | 1989-10-05 | 1989-10-05 | Lens extension mechanism of shutter for zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11753889U JP2505431Y2 (en) | 1989-10-05 | 1989-10-05 | Lens extension mechanism of shutter for zoom lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0356914U true JPH0356914U (en) | 1991-05-31 |
| JP2505431Y2 JP2505431Y2 (en) | 1996-07-31 |
Family
ID=31665753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11753889U Expired - Lifetime JP2505431Y2 (en) | 1989-10-05 | 1989-10-05 | Lens extension mechanism of shutter for zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2505431Y2 (en) |
-
1989
- 1989-10-05 JP JP11753889U patent/JP2505431Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2505431Y2 (en) | 1996-07-31 |
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