JPH01164408U

JPH01164408U -

Info

Publication number: JPH01164408U
Application number: JP6047388U
Authority: JP
Priority date: 1988-05-07
Filing date: 1988-05-07
Publication date: 1989-11-16

Description

[Brief explanation of the drawing]

第１図〜第９図は、本考案の一実施例に係るレ
ンズ移動カム装置を示し、第１図はカメラの鏡胴
断面図、第２図はズームカム環の正面図、第３図
は第２図における―線断面図、第４図はズー
ムカム環の展開図、第５図はズーム回転環の正面
図、第６図は第５図における―線断面図、第
７図はズーム回転環の展開図、第８図は上記ズー
ムカム環とズーム回転環とを組合せた状態におけ
る展開図で、図中、Ａは長焦点時の組合せ展開図
、Ｂは中焦点時の組合せ展開図、Ｃは短焦点時の
組合せ展開図であり、第９図はズーム回転環とズ
ームカム環との組立て手順を示す説明図である。１…レンズマウント、２…保持環、３…ズーム
操作環、４…フオーカス操作環、５…第１レンズ
群移動枠、６…ズームカム環、７…円筒部材（ズ
ーム回転環）、８…固定筒、９…第２レンズ移動
枠、１０…ズーム環直進ガイド棒、１１…直進ガ
イド保持板、１２…フオーカスストツパー板、１
３…ＡＦ連動ギヤ、６１…前側カム部、６１ａ…
カム面、６２…後側カム部、６２ａ…カム面、６
３…ズーム環直進ガイド溝、６４…第１レンズ群
繰出し用ネジ、６５…カムフオロワー通過溝、７
１…回転連動部、７２…前側カムフオロワー、７
３…後側カムフオロワー。 1 to 9 show a lens moving cam device according to an embodiment of the present invention, in which FIG. 1 is a cross-sectional view of the lens barrel of the camera, FIG. 2 is a front view of the zoom cam ring, and FIG. 2 is a cross-sectional view taken along the line in FIG. 2, FIG. 4 is a developed view of the zoom cam ring, FIG. 5 is a front view of the zoom rotating ring, FIG. 6 is a sectional view taken along the line in FIG. Developed view, Figure 8 is a developed view of the above-mentioned zoom cam ring and zoom rotation ring in a combined state. FIG. 9 is an exploded view of the combination at the time of focusing, and FIG. 9 is an explanatory diagram showing the assembly procedure of the zoom rotation ring and the zoom cam ring. DESCRIPTION OF SYMBOLS 1... Lens mount, 2... Holding ring, 3... Zoom operation ring, 4... Focus operation ring, 5... First lens group moving frame, 6... Zoom cam ring, 7... Cylindrical member (zoom rotation ring), 8... Fixed barrel , 9... Second lens moving frame, 10... Zoom ring linear guide rod, 11... Straight guide holding plate, 12... Focus stopper plate, 1
3...AF interlocking gear, 61...front cam part, 61a...
Cam surface, 62... Rear cam part, 62a... Cam surface, 6
3...Zoom ring linear guide groove, 64...Screw for feeding out the first lens group, 65...Cam follower passage groove, 7
1... Rotation interlocking part, 72... Front cam follower, 7
3...Rear cam follower.

Claims

[Claims for Utility Model Registration] A fixed barrel 8 of the lens barrel, a zoom rotating ring 7 fitted on the outer periphery of the fixed barrel 8 so as not to be movable in the optical axis direction, and a zoom ring 7 fitted on the outer periphery of the zoom rotating ring 7. A lens moving cam device comprising a zoom cam ring 6 non-rotatably fitted to a rotating ring 7, and moving the zoom cam ring 6 back and forth in the axial direction by rotating the zoom rotating ring 7. A pair of convex cam followers 72 and 73 are formed on the outer surface of the cylindrical portion of the zoom rotation ring 7, front and back in the optical axis direction and integrally arranged along the circumferential direction without overlapping, and the zoom cam ring 6 is provided with: A front cam that is sandwiched between the pair of cam followers 72 and 73 and is located at the front and back in the optical axis direction and without overlapping along the circumferential direction, and has corresponding cam surfaces 61a and 62a in contact with each of the cam followers 72 and 73. Part 61
and a rear cam portion 62, and further includes, at the time of assembly,
A cam follower passage bottomed groove 65 through which one of the cam followers 72 can pass is formed along the optical axis direction at a position that does not interfere with each of the cam parts 61 and 62, and the zoom cam ring 6 passes through the cam follower passage bottomed groove 65. A cam device for moving a lens, characterized in that it can be assembled and connected from one direction through a cam device.