JPH0241212U

JPH0241212U -

Info

Publication number: JPH0241212U
Application number: JP11924488U
Authority: JP
Priority date: 1988-09-13
Filing date: 1988-09-13
Publication date: 1990-03-22
Anticipated expiration: 2003-09-13
Also published as: JPH0720646Y2

Description

[Brief explanation of drawings]

第１図は、本考案に係るズームレンズのズーム
駆動位置情報の伝達装置の一実施例の構成を上半
分が短焦点側に駆動された状態で示し、下半分が
長焦点側に駆動された状態で示す縦断面図、第２
図は、第１図中に示されるレンズ群のズームおよ
びフオーカス移動に伴う移動軌跡を示す特性図、
第３図は、第１図中に示される各種カム部材の展
開図、第４図は、第３図中に示される光軸規制部
材の動作を示す展開図、第５図は、第１図中に示
されるズーム駆動位置情報の伝達装置の背面図で
ある。１〜５……第１群レンズ〜第５群レンズ、６…
…固定枠、６ｅ……周回溝、８……駆動枠、８ｄ
……周回溝、８ｆ……回転規制溝、９……第１移
動枠、１０……支持部材、１０ａ……光軸方向位
置規制突起、１０ｂ……突状部、１１……接点ブ
ラシ、１３……接点基板、１５……レンズ枠、１
６……第１カムピン、１７……第２移動枠、１８
……第２カムピン、１９……第３移動枠、２０…
…レンズ枠、２１……第４移動枠、２２……第３
カムピン、２３……移動枠、２３Ａ……光軸規制
部材、２４……第４カムピン、２５……補助固定
枠、２６……フオーカス駆動枠、２７，３０……
出力歯車。 FIG. 1 shows the configuration of an embodiment of the zoom drive position information transmission device for a zoom lens according to the present invention, with the upper half driven toward the short focus side, and the lower half driven toward the long focus side. Longitudinal cross-sectional view shown in condition, 2nd
The figure is a characteristic diagram showing the movement trajectory accompanying the zoom and focus movement of the lens group shown in Fig. 1;
3 is a developed view of various cam members shown in FIG. 1, FIG. 4 is a developed view showing the operation of the optical axis regulating member shown in FIG. 3, and FIG. 5 is a developed view of the various cam members shown in FIG. 1. FIG. 3 is a rear view of the zoom drive position information transmission device shown in FIG. 1 to 5...1st group lens to 5th group lens, 6...
...Fixed frame, 6e... Circumferential groove, 8... Drive frame, 8d
... Circumferential groove, 8f... Rotation regulating groove, 9... First moving frame, 10... Supporting member, 10a... Optical axis direction position regulating projection, 10b... Projection, 11... Contact brush, 13 ... Contact board, 15 ... Lens frame, 1
6...First cam pin, 17...Second moving frame, 18
...Second cam pin, 19...Third moving frame, 20...
...Lens frame, 21...Fourth moving frame, 22...Third
Cam pin, 23... Moving frame, 23A... Optical axis regulating member, 24... Fourth cam pin, 25... Auxiliary fixed frame, 26... Focus drive frame, 27, 30...
output gear.

Claims

[Scope of utility model registration request]

A plurality of movable frames each of which is fixed to each of a plurality of lens groups forming a zoom lens optical system engages with the drive frame, and the drive frame is fitted in such a manner that it can rotate and slide relative to the fixed frame. By rotationally driving, the plurality of movable frames are moved by a predetermined amount in the direction of the optical axis to perform zoom driving, and by driving the drive frame in the direction of the optical axis, all or one of the plurality of movable frames are moved. In a zoom lens that performs focus drive by selectively moving a portion in the optical axis direction, a plurality of arc-shaped zoom drive information patterns are formed with the axial center of the drive frame as the center of the arc, and are arranged on the camera body side. A contact board and a contact brush that presses into contact with the zoom drive information pattern of this contact board are supported at one end, and the other end is prevented from moving in the optical axis direction with respect to the fixed frame and is only allowed to rotate. The rotational force of the drive frame is received by a rotation transmission means that is engaged with and supported by the axial position regulating means and is rotated integrally with the drive frame, but allows movement of the drive frame in the optical axis direction. 1. A device for transmitting zoom drive position information for a zoom lens, comprising: a rotating support member.