JPH01135410U - - Google Patents
Info
- Publication number
- JPH01135410U JPH01135410U JP3118088U JP3118088U JPH01135410U JP H01135410 U JPH01135410 U JP H01135410U JP 3118088 U JP3118088 U JP 3118088U JP 3118088 U JP3118088 U JP 3118088U JP H01135410 U JPH01135410 U JP H01135410U
- Authority
- JP
- Japan
- Prior art keywords
- cam
- follower
- cam follower
- lens barrel
- movement
- 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
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Lens Barrels (AREA)
Description
第１図〜第３図は本考案の一実施例を示し、第
１図および第２図は第１のレンズ群が広角端位置
および望遠端位置にあるときのズームレンズ鏡筒
をそれぞれ示す説明図であり、ａがレンズ鏡筒の
縦断面、ｂがそのｂ―ｂ線断面を示す。第３図は
、第１、第２のレンズ群の移動軌跡を示す図であ
り、ａが広角時、ｂは望遠時である。
３：第１のレンズ群保持部材、５：回転筒、５
ｂ：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、１１：縮みばね
、１２：引張りばね。
1 to 3 show an embodiment of the present invention, and FIGS. 1 and 2 are explanations showing the zoom lens barrel when the first lens group is at the wide-angle end position and the telephoto end position, respectively. FIG. 3A shows a vertical cross section of the lens barrel, and b shows a cross section thereof taken along the line bb. FIG. 3 is a diagram showing the movement trajectories of the first and second lens groups, where a indicates the wide-angle mode and b indicates the telephoto mode. 3: First lens group holding member, 5: Rotating tube, 5
b: cam hole, 5c: cam surface, 6: second lens group holding member, 6a: cam follower, 11: compression spring, 12: tension spring.
Claims (1)
往復運動するカムフオロアを有し、前記カム部材
の移動に伴うカムの運動により該カムフオロアを
介して駆動される移動体とを備え、該移動体によ
つてレンズまたは鏡筒を駆動するカメラレンズ鏡
筒のカム機構において、 前記カムフオロアが前記カム上の第１の位置と
第２の位置との間で往復運動するときに該カムフ
オロアが常にカムと当接するようにカムフオロア
を付勢する第１の弾性体と、 前記カムの運動による前記第１の位置と第２の
位置との間で前記カムフオロアが往復運動する際
に前記第１の弾性体により前記カム部材に作用す
る負荷の変動を軽減すべく前記カムを前記カムフ
オロアに向けて付勢する第２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 cam member having a cam, and a cam follower that reciprocates between a first position and a second position on the cam, the movement of the cam accompanying the movement of the cam member. and a movable body driven by the movable body via the cam follower, the cam mechanism for a camera lens barrel in which the movable body drives a lens or a lens barrel, wherein the cam follower is located between a first position on the cam and a first position on the cam. a first elastic body that biases the cam follower so that the cam follower always comes into contact with the cam when reciprocating between the second position; and the first position and the second position due to the movement of the cam; a second elastic body that urges the cam toward the cam follower in order to reduce fluctuations in the load applied to the cam member by the first elastic body when the cam follower reciprocates between A cam mechanism for a camera lens barrel that is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3118088U JPH0643768Y2 (en) | 1988-03-08 | 1988-03-08 | Cam mechanism of camera lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3118088U JPH0643768Y2 (en) | 1988-03-08 | 1988-03-08 | Cam mechanism of camera lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01135410U true JPH01135410U (en) | 1989-09-18 |
| JPH0643768Y2 JPH0643768Y2 (en) | 1994-11-14 |
Family
ID=31256851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3118088U Expired - Lifetime JPH0643768Y2 (en) | 1988-03-08 | 1988-03-08 | Cam mechanism of camera lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0643768Y2 (en) |
-
1988
- 1988-03-08 JP JP3118088U patent/JPH0643768Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0643768Y2 (en) | 1994-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0192618U (en) | ||
| JPH01135410U (en) | ||
| JPS6098805U (en) | Zoom lens cam mechanism | |
| JPH0258207U (en) | ||
| JPS614914U (en) | lens barrel | |
| JPH01171412U (en) | ||
| JPH0477116U (en) | ||
| JPS62184512U (en) | ||
| JPS58115708U (en) | lens barrel | |
| JPS5891709U (en) | Straight guide mechanism of helicoid device | |
| JPS6074116U (en) | Lens barrel distance adjustment device | |
| JPS59149107U (en) | Floating lens feeding mechanism | |
| JPS60135710U (en) | zoom lens barrel | |
| JPS6080406U (en) | zoom lens barrel | |
| JPS6011313U (en) | Zoom lens structure that allows for extremely close-up photography | |
| JPS615366U (en) | fuel injection pump | |
| JPS58115706U (en) | lens barrel | |
| JPS58166604U (en) | Internal anti-reflection structure of zoom lens | |
| JPS591007U (en) | shift lens device | |
| JPS58144311U (en) | Autofocus camera lens extension mechanism | |
| JPH0213214U (en) | ||
| JPH0289412U (en) | ||
| JPS6443315U (en) | ||
| JPH02142807U (en) | ||
| JPS5812753U (en) | cam mechanism |