JPS63101912U - - Google Patents
Info
- Publication number
- JPS63101912U JPS63101912U JP19791586U JP19791586U JPS63101912U JP S63101912 U JPS63101912 U JP S63101912U JP 19791586 U JP19791586 U JP 19791586U JP 19791586 U JP19791586 U JP 19791586U JP S63101912 U JPS63101912 U JP S63101912U
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- lens
- lens barrel
- barrel
- cylindrical portion
- 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
- 230000003287 optical effect Effects 0.000 claims 8
Landscapes
- Lens Barrels (AREA)
Description
第１図は本考案によるズームレンズ鏡筒の一実
施例を示す縦断面図、第２図はその横断面図、第
３図はカム環の分解断面図、第４図は従来のズー
ムレンズ鏡筒の縦断面図を示している。
２０……カム環、２１ａ，２１ｂ……係合ピン
、２２，２３……レンズホルダー、２４……ズー
ム操作環、２５，２６……ガイドバー、２７……
固定鏡筒、２８……前側マスク板、２９……後側
マスク板。
Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the zoom lens barrel according to the present invention, Fig. 2 is a cross-sectional view thereof, Fig. 3 is an exploded cross-sectional view of the cam ring, and Fig. 4 is a conventional zoom lens barrel. A vertical cross-sectional view of the cylinder is shown. 20...Cam ring, 21a, 21b...Engaging pin, 22, 23...Lens holder, 24...Zoom operation ring, 25, 26...Guide bar, 27...
Fixed lens barrel, 28...front mask plate, 29...rear mask plate.
Claims (1)
ズを筒内に光軸方向移動可能に離隔して配置した
固定鏡筒と、該第１のレンズを保持するレンズホ
ルダから該固定鏡筒の筒壁を通して径方向に延び
る第１の係合部材と、該第２のレンズを保持する
レンズホルダから該固定鏡筒の筒壁を通して径方
向に延びる第２の係合部材と、内周壁面に該第１
の係合部材が係合する第１のカム溝と該第２の係
合部材が係合する第２のカム溝が光軸方向に沿つ
て離隔して形成され、該固定鏡筒に光軸方向移動
不能かつ光軸を中心として回転可能に内装された
筒状のカム部材と、該固定鏡筒に光軸方向移動不
能かつ光軸を中心として回転可能に外装されると
ともに該カム部材と連結された操作部材とを備え
、該カム部材は光軸方向に沿つて接合する第１の
円筒部と第２の円筒部とからなり、該第１の円筒
部と第２の円筒部とはその接合端面側に該第１の
カム溝および第２のカム溝の片半部分を夫々含む
ように分割形成したことを特徴とするズームレン
ズ鏡筒。 A fixed lens barrel in which a first lens for zooming or correction and a second lens are arranged in a cylinder so as to be movable in the optical axis direction, and a lens holder that holds the first lens to the fixed mirror. a first engaging member extending radially through the barrel wall of the tube; a second engaging member extending radially from the lens holder holding the second lens through the barrel wall of the fixed lens barrel; the first one on the wall
A first cam groove with which the engaging member engages and a second cam groove with which the second engaging member engages are formed spaced apart along the optical axis direction, and the optical axis is connected to the fixed lens barrel. a cylindrical cam member that is immovable in the direction of the optical axis and rotatable around the optical axis; a cylindrical cam member that is mounted on the fixed lens barrel and that is immovable in the direction of the optical axis and rotatable around the optical axis; and connected to the cam member; The cam member includes a first cylindrical portion and a second cylindrical portion that are joined along the optical axis direction, and the first cylindrical portion and the second cylindrical portion are 1. A zoom lens barrel, characterized in that the zoom lens barrel is divided into two halves of the first cam groove and the second cam groove on the joint end surface side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19791586U JPS63101912U (en) | 1986-12-23 | 1986-12-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19791586U JPS63101912U (en) | 1986-12-23 | 1986-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63101912U true JPS63101912U (en) | 1988-07-02 |
Family
ID=31158122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19791586U Pending JPS63101912U (en) | 1986-12-23 | 1986-12-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63101912U (en) |
-
1986
- 1986-12-23 JP JP19791586U patent/JPS63101912U/ja active Pending