JPS63130714U

JPS63130714U -

Info

Publication number: JPS63130714U
Application number: JP2268587U
Authority: JP
Priority date: 1987-02-20
Filing date: 1987-02-20
Publication date: 1988-08-26

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例の構成を示すバリ
フオーカスレンズ鏡胴の概略断面図、第２図は、
第１図中に示される各種カム部材を展開して示す
展開図、第３図は、第１図中に示される各種レン
ズの変倍移動とフオーカス移動を示す線図である
。１，３……固定鏡胴、２……連結部材、４，１
１……変倍駆動枠、４ａ，４ｂ，１１ａ，１１ｂ
，１１ｃ……第１ないし第５カム溝、５，８，１
２，１５，１８……第１ないし第５群レンズ、６
，９，１３，１６，１９……第１ないし第５移動
枠、７，１０，１４，１７，２０……第１ないし
第５カムピン、２１，２２，２４……中継カムピ
ン、２３……直進枠、２５……フオーカス駆動枠
、２７……フオーカス駆動モータ、２９……変倍
駆動モータ、３１……ストツパーピン、４０……
近距離ストツパーカム面。 FIG. 1 is a schematic cross-sectional view of a variable focus lens barrel showing the configuration of an embodiment of the present invention, and FIG.
FIG. 3 is an exploded view showing the various cam members shown in FIG. 1, and a diagram showing the magnification movement and focus movement of the various lenses shown in FIG. 1. 1, 3... Fixed lens barrel, 2... Connecting member, 4, 1
1... variable power drive frame, 4a, 4b, 11a, 11b
, 11c...first to fifth cam grooves, 5, 8, 1
2, 15, 18...first to fifth group lenses, 6
, 9, 13, 16, 19... 1st to 5th moving frame, 7, 10, 14, 17, 20... 1st to 5th cam pin, 21, 22, 24... Relay cam pin, 23... Straight forward Frame, 25... Focus drive frame, 27... Focus drive motor, 29... Magnification variable drive motor, 31... Stopper pin, 40...
Close-range stopper cam surface.

Claims

[Scope of utility model registration request]

Each of the plurality of lens groups is fixed, and a plurality of cam grooves each engage with a cam pin provided in each of a plurality of movable frames that are arranged to be slidable in the optical axis direction with respect to the fixed lens barrel are provided. The plurality of lens groups are driven to change the magnification by integrally rotating and driving a plurality of variable power drive frames rotatable with respect to the fixed lens barrel by a variable power drive motor, By driving only a predetermined variable power drive frame among the variable power drive frames with a focusing drive motor, only the lens group that engages with the predetermined variable power drive frame is driven in the optical axis direction to perform focusing drive. In the variable focus lens barrel, there is a stopper pin fixed to the fixed lens barrel, and a stopper pin provided on the predetermined variable power drive frame so as to abut the stopper pin at a position corresponding to the closest distance during variable power driving. A varifocus lens barrel characterized by comprising a distance stopper cam.