JPH0258207U - - Google Patents
Info
- Publication number
- JPH0258207U JPH0258207U JP13713988U JP13713988U JPH0258207U JP H0258207 U JPH0258207 U JP H0258207U JP 13713988 U JP13713988 U JP 13713988U JP 13713988 U JP13713988 U JP 13713988U JP H0258207 U JPH0258207 U JP H0258207U
- Authority
- JP
- Japan
- Prior art keywords
- cam
- optical axis
- lens group
- movable body
- cam follower
- 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 5
Landscapes
- Focusing (AREA)
- Lens Barrels (AREA)
Description
第１図および第２図は本考案の一実施例を示し
、第１図は本考案に係るカメラレンズ鏡筒のカム
機構を模式的に示す展開図、第２図はズームレン
ズの駆動機構を示す断面図である。
３……第１のレンズ群保持部材、５……回転筒
、５ｂ……カム孔、５ｃ……カム面、６……第２
のレンズ群保持部材、６ａ……カムフオロア、１
２……引張りばね。
1 and 2 show an embodiment of the present invention, FIG. 1 is an exploded view schematically showing a cam mechanism of a camera lens barrel according to the present invention, and FIG. 2 shows a drive mechanism of a zoom lens. FIG. 3...First lens group holding member, 5...Rotating tube, 5b...Cam hole, 5c...Cam surface, 6...Second
lens group holding member, 6a... cam follower, 1
2...Tension spring.
Claims (1)
、 該キー部材により回転を阻止されつつ光軸方向
に移動して第１のレンズ群を駆動する第１の移動
体と、 該第１の移動体と一体に前記光軸方向に移動可
能とされるとともに、前記カムに係合されるカム
フオロアを有し、前記所定方向の移動に伴つて該
カムフオロアが前記カム上の第１の位置と第２の
位置との間を運動することにより光軸回りに回転
するカム部材と、 該カム部材の光軸回りの回転に伴つて前記光軸
方向に移動して第２のレンズ群を前記第１のレン
ズ群に対して相対駆動する第２の移動体と、 前記第１の移動体が移動する際に該第１の移動
体が常に前記キー部材と当接するように該第１の
移動体を付勢するとともに、前記カムフオロアが
前記カム上の前記第１の位置と第２の位置との間
を往復運動する際に該カムフオロアが常に前記カ
ムと当接するように該カムフオロアを付勢する単
一の弾性体とを具備することを特徴とするカメラ
レンズ鏡筒のカム機構。[Claims for Utility Model Registration] A key member fixed to a camera body and having a cam; a first movable body that moves in the optical axis direction and drives a first lens group while being prevented from rotating by the key member; , a cam follower that is movable in the optical axis direction together with the first movable body and that is engaged with the cam, and as the cam follower moves in the predetermined direction, the cam follower moves along the first movable body on the cam. a cam member that rotates around the optical axis by moving between a first position and a second position; and a second lens that moves in the optical axis direction as the cam member rotates around the optical axis. a second movable body that drives the lens group relative to the first lens group; and a second movable body that drives the lens group relative to the first lens group; the cam follower so that the cam follower always comes into contact with the cam when the cam follower reciprocates between the first position and the second position on the cam; A cam mechanism for a camera lens barrel, comprising a single biasing elastic body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13713988U JPH0740969Y2 (en) | 1988-10-19 | 1988-10-19 | Cam mechanism of camera lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13713988U JPH0740969Y2 (en) | 1988-10-19 | 1988-10-19 | Cam mechanism of camera lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0258207U true JPH0258207U (en) | 1990-04-26 |
| JPH0740969Y2 JPH0740969Y2 (en) | 1995-09-20 |
Family
ID=31398293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13713988U Expired - Lifetime JPH0740969Y2 (en) | 1988-10-19 | 1988-10-19 | Cam mechanism of camera lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0740969Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005351982A (en) * | 2004-06-08 | 2005-12-22 | Canon Inc | Zoom lens barrel and camera |
-
1988
- 1988-10-19 JP JP13713988U patent/JPH0740969Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005351982A (en) * | 2004-06-08 | 2005-12-22 | Canon Inc | Zoom lens barrel and camera |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0740969Y2 (en) | 1995-09-20 |
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