JPH03129934U

JPH03129934U -

Info

Publication number: JPH03129934U
Application number: JP3786390U
Authority: JP
Priority date: 1990-04-09
Filing date: 1990-04-09
Publication date: 1991-12-26
Anticipated expiration: 2005-04-09
Also published as: JP2521864Y2

Description

[Brief explanation of drawings]

第１図は、この考案の実施例によるレンズ移動
装置の構成を示す側断面図、第２図は、第１図の
Ｘ−Ｘ線矢視方向断面をさらに一部破断して示す
断面図、第３図は、カム部材とその関連部材との
関係を示す背面図、第４図は、第３図のＹ−Ｙ線
断面を展開して示す説明図である。１……鏡胴カバー、２……固定鏡胴、２ａ……
鏡胴取付枠、２ｂ……鏡胴リング、２ｃ……フラ
ンジ部、４……案内リング、５……第１の送りね
じ、６，１５……歯車、７……接触子、９……コ
イルばね、１１……前群移動枠、１２，１８……
レンズ枠、１３……前群レンズ群、１４……第２
の送りねじ、１７……後群移動枠、１９……後群
レンズ群、２０ａ，２０ｂ……ガイド棒、２１…
…駆動リング、２２，２６……内歯歯車、２３…
…第１のモータ、２５……カム部材、２７……減
速歯車、２８……第２のモータ、３０……カム面
。 FIG. 1 is a side sectional view showing the configuration of a lens moving device according to an embodiment of the invention, FIG. 2 is a sectional view further partially broken away from the cross section taken along the line X--X in FIG. FIG. 3 is a rear view showing the relationship between the cam member and its related members, and FIG. 4 is an explanatory diagram showing a developed cross-section taken along the line Y--Y in FIG. 3. 1... Lens barrel cover, 2... Fixed lens barrel, 2a...
Lens barrel mounting frame, 2b... Lens barrel ring, 2c... Flange portion, 4... Guide ring, 5... First feed screw, 6, 15... Gear, 7... Contact, 9... Coil Spring, 11... Front group moving frame, 12, 18...
Lens frame, 13...Front lens group, 14...Second
feed screw, 17... Rear group moving frame, 19... Rear group lens group, 20a, 20b... Guide rod, 21...
...Drive ring, 22, 26...Internal gear, 23...
...first motor, 25...cam member, 27...reduction gear, 28...second motor, 30...cam surface.

Claims

[Scope of claim for utility model registration] A lens moving device that changes magnification or focuses by relatively moving a plurality of lens groups in the optical axis direction, which is rotatable toward the inner wall of a fixed lens barrel and is rotatable in the optical axis direction. a first feed screw that is movably disposed to the main body, has a gear and a contact, and is biased by a spring toward the side where the contact is provided; An arbitrary first lens group of the plurality of lens groups attached to the first movable frame via a lens frame, and a first lens group that is rotatable toward the inner wall side of the fixed lens barrel and that is disposed immovably and is attached via a lens frame to a second feed screw having a gear, and a second moving frame screwed to the second feed screw. an arbitrary second lens group; a guide rod that guides the movement of the first movable frame and the second movable frame in the optical axis direction; and an inner peripheral portion of the fixed lens barrel having a substantially annular shape. a drive ring that is rotatably supported by the drive ring and that gears of the first and second feed screws mesh with gears provided on the inner or outer periphery; and a drive ring that meshes with the gears of the drive ring and rotationally drives the drive ring. 1 motor, a gear is formed on at least a part of the motor, a cam surface is formed on the end surface to come into contact with a contact at the tip of the first feed screw, and the motor is rotatably mounted on the inner circumference of the fixed lens barrel. a supported cam member; and a second motor that rotationally drives the cam member through its gear and a reduction gear; rotating the second feed screw to relatively linearly displace the first and second lens groups in the optical axis direction, and at the same time rotating the cam member at a reduced speed by rotating the second motor; A lens moving device characterized in that the first feed screw is moved in the optical axis direction by the cam surface, and the first lens group is moved by an inflection displacement in combination with the linear displacement movement. .