JPS6445827U

JPS6445827U -

Info

Publication number: JPS6445827U
Application number: JP14193687U
Authority: JP
Priority date: 1987-09-16
Filing date: 1987-09-16
Publication date: 1989-03-20

Description

[Brief explanation of the drawing]

第１図〜第４図は本考案に係るフアインダ装置
の一実施例を説明する図で、第１図はその斜視図
、第２図はその正面図、第３図はフアインダ装置
の動作説明図、第４図は歯車の配置図である。第
５図は従来のフアインダ装置の一例を示す斜視図
、第６図はその正面図である。１４：移動部材、１８：ラツク部、２０：ピニ
オン、２４：ばね、３７：駆動歯車、２８：ヘリ
コイド、４０：拡散板、４２：発光部、４６：第
１の対物レンズ、５０：第２の対物レンズ、５２
：アルバダレンズ、５４：フレームガラス、５６
：接眼レンズ、１２２：伝達歯車、１２２ａ：歯
部、１２２ｂ：切欠歯、１２２ｃ：平坦部、１３
２：出力側歯車、１３４：盛土部、１３６：入力
側歯車、ＬＸ：光軸、ＬＳ：レンズ光学系、ＦＤ
：フアインダ装置。 1 to 4 are views for explaining an embodiment of the finder device according to the present invention, FIG. 1 is a perspective view thereof, FIG. 2 is a front view thereof, and FIG. 3 is an explanatory diagram of the operation of the finder device. , FIG. 4 is a diagram showing the arrangement of gears. FIG. 5 is a perspective view showing an example of a conventional finder device, and FIG. 6 is a front view thereof. 14: Moving member, 18: Rack part, 20: Pinion, 24: Spring, 37: Drive gear, 28: Helicoid, 40: Diffusion plate, 42: Light emitting part, 46: First objective lens, 50: Second Objective lens, 52
: Arvada lens, 54: Frame glass, 56
: Eyepiece, 122: Transmission gear, 122a: Teeth, 122b: Notch tooth, 122c: Flat part, 13
2: Output side gear, 134: Embankment part, 136: Input side gear, LX: Optical axis, LS: Lens optical system, FD
:Finder device.

Claims

[Claims for Utility Model Registration] 1. A drive gear for driving a drive lens barrel, and an input side gear that meshes with the drive gear is carved on the outer peripheral surface, and is driven to obtain at least first and second focal lengths. a driving lens barrel rotationally driven by a gear; a lens optical system that moves back and forth along the optical axis as the driving lens barrel rotates to obtain the first and second focal lengths; and rotation of the driving lens barrel. and a finder device for setting first and second finder optical systems corresponding to first and second focal lengths in conjunction with the rotation of the drive lens barrel. A transmission gear is provided for transmitting the information to the finder device, and an output gear is provided on the drive lens barrel to mesh with the transmission gear, and a meshing portion between the output gear and the transmission gear is connected to the drive gear and the input gear. A finder drive device for a multifocal camera, characterized in that the meshing portions of the two are aligned in a line in a direction perpendicular to the optical axis. 2. The viewfinder drive device for a multi-focal camera according to claim 1, wherein the output gear is provided to overlap a part of the input gear. 3. The finder drive device for a multi-focal camera according to claim 1, wherein the output gear extends in a circumferential direction of the input gear.