JPH0224815U - - Google Patents
Info
- Publication number
- JPH0224815U JPH0224815U JP10289688U JP10289688U JPH0224815U JP H0224815 U JPH0224815 U JP H0224815U JP 10289688 U JP10289688 U JP 10289688U JP 10289688 U JP10289688 U JP 10289688U JP H0224815 U JPH0224815 U JP H0224815U
- Authority
- JP
- Japan
- Prior art keywords
- cam
- cam follower
- main body
- lens
- convex
- 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
- 230000003287 optical effect Effects 0.000 claims 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Lens Barrels (AREA)
Description
第１図〜第５図は、本考案の一実施例に係るレ
ンズ鏡胴のカム装置を示し、第１図はレンズ鏡胴
を示す一部省略断面図、第２図はカム装置におけ
るカムフオロワーの斜視図、第３図は該カムフオ
ロワーの動作を説明するために上記レンズ鏡胴を
展開した状態を示す展開図、第４図はカム筒の断
面図、第５図は上記カムフオロワーの一変形例を
示す斜視図である。
１……レンズマウント、２……固定筒、３……
回転筒（カム筒）、４……押さえ板、５……可動
枠（第１可動枠）、５ａ……座面、６……第２可
動枠、７，７′……カムフオロワー（第１カムフ
オロワー）、８……第２カムフオロワー、９……
取付けビス、２１……第１直進溝、２２……第２
直進溝、３１……凸状カム（第１カム）、３１ａ
……カム面、３２……第２カム、７１，７１′…
…接触子（カムフオロワーピン）、７１ａ，７１
ａ′……カム対応面、７２，７２′……カムフオ
ロワー本体、９１……カムフオロワー嵌合部、Ｌ
１……第１レンズ群、Ｌ２……第２レンズ群。
1 to 5 show a cam device for a lens barrel according to an embodiment of the present invention, FIG. 1 is a partially omitted sectional view showing the lens barrel, and FIG. 2 is a cam follower in the cam device. FIG. 3 is an exploded view showing the lens barrel in an expanded state to explain the operation of the cam follower, FIG. 4 is a sectional view of the cam barrel, and FIG. 5 is a modified example of the cam follower. FIG. 1...Lens mount, 2...Fixed tube, 3...
Rotating tube (cam tube), 4... Pressing plate, 5... Movable frame (first movable frame), 5a... Seating surface, 6... Second movable frame, 7, 7'... Cam follower (first cam follower) ), 8...second cam follower, 9...
Installation screw, 21...first straight groove, 22...second
Straight groove, 31...Convex cam (first cam), 31a
...Cam surface, 32...Second cam, 71, 71'...
...Contact (cam follower pin), 71a, 71
a'...Cam compatible surface, 72, 72'...Cam follower body, 91...Cam follower fitting part, L
1 ...first lens group, L2 ...second lens group.
Claims (1)
りに回転自在に設けられる回転筒３の内周面に形
設された凸状カム３１と、 上記回転筒３の内側に光軸方向に移動可に装着
されかつレンズＬ１を保持する可動枠５の外周面
に備えられた、上記凸状カム３１と協働するカム
フオロワー７とを備えたレンズ鏡胴のカム装置に
おいて、 上記カムフオロワー７は、上記可動枠５に回転
可に支持されたカムフオロワー本体７２と、該カ
ムフオロワー本体７２に設けられかつ上記凸状カ
ム３１のカム面３１ａに当接する曲面状のカム対
応面７１ａを有する一対の接触子７１，７１とを
備えてなり、 上記カム対応面７１ａが上記カムフオロワー本
体７２の回転中心軸に対して対称に位置している
ことを特徴とするレンズ鏡胴のカム装置。[Claims for Utility Model Registration] A convex cam 31 formed on the inner circumferential surface of a rotary tube 3 that is held immovably in the optical axis direction but rotatable around the optical axis; The lens barrel is equipped with a cam follower 7 that cooperates with the convex cam 31 and is provided on the outer peripheral surface of a movable frame 5 that is movably mounted inside the lens L1 and that holds the lens L1. In the cam device, the cam follower 7 includes a cam follower main body 72 rotatably supported by the movable frame 5, and a curved cam provided on the cam follower main body 72 and in contact with the cam surface 31a of the convex cam 31. A cam for a lens barrel, comprising a pair of contacts 71, 71 having surfaces 71a, and the cam corresponding surface 71a is located symmetrically with respect to the rotation center axis of the cam follower main body 72. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10289688U JPH075450Y2 (en) | 1988-08-03 | 1988-08-03 | Cam device for lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10289688U JPH075450Y2 (en) | 1988-08-03 | 1988-08-03 | Cam device for lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0224815U true JPH0224815U (en) | 1990-02-19 |
| JPH075450Y2 JPH075450Y2 (en) | 1995-02-08 |
Family
ID=31333224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10289688U Expired - Lifetime JPH075450Y2 (en) | 1988-08-03 | 1988-08-03 | Cam device for lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH075450Y2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04104112A (en) * | 1990-08-23 | 1992-04-06 | Canon Inc | Movement device for lens barrel |
| JPH0494002U (en) * | 1990-12-28 | 1992-08-14 | ||
| JP2009216880A (en) * | 2008-03-10 | 2009-09-24 | Canon Inc | Lens holding structure and photographing apparatus |
| JP2010197698A (en) * | 2009-02-25 | 2010-09-09 | Canon Inc | Lens barrel, and image capturing apparatus having the same |
-
1988
- 1988-08-03 JP JP10289688U patent/JPH075450Y2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04104112A (en) * | 1990-08-23 | 1992-04-06 | Canon Inc | Movement device for lens barrel |
| JPH0494002U (en) * | 1990-12-28 | 1992-08-14 | ||
| JP2009216880A (en) * | 2008-03-10 | 2009-09-24 | Canon Inc | Lens holding structure and photographing apparatus |
| JP2010197698A (en) * | 2009-02-25 | 2010-09-09 | Canon Inc | Lens barrel, and image capturing apparatus having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH075450Y2 (en) | 1995-02-08 |
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