JPH038307U

JPH038307U -

Info

Publication number: JPH038307U
Application number: JP6963989U
Authority: JP
Priority date: 1989-06-14
Filing date: 1989-06-14
Publication date: 1991-01-25

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案よりなるレンズ鏡筒の構成概要
一例を示した縦断面図、第２図は同レンズ鏡筒の
側面断面図、第３図及び第４図は従来のレンズ鏡
筒の一例を示した縦断面図、第５図〜第７図は従
来の他のレンズ鏡筒を示した図であり、第５図は
縦断面図、第６図はギア連係関係を模式的に説明
する図、第７図はレンズ鏡筒の側面断面図である
。１……固定外装、２……固定鏡胴、３……レン
ズ保持枠、４……回転部材（マニユアルリング）
、５……表示窓、６……回転部材、７，８……連
動板、９……固定鏡胴、１２……保持部材、１３
……回転軸部材、１４……ギア、１５……フリク
シヨンスプリング、２０……切換ノブ、２１……
ギア、３４……駆動モータ。 Fig. 1 is a vertical sectional view showing an example of the general configuration of a lens barrel according to the present invention, Fig. 2 is a side sectional view of the same lens barrel, and Figs. 3 and 4 are examples of conventional lens barrels. FIG. 5 to FIG. 7 are views showing other conventional lens barrels, FIG. 5 is a vertical cross-sectional view, and FIG. 6 schematically explains gear linkage. 7 are side sectional views of the lens barrel. 1... Fixed exterior, 2... Fixed lens barrel, 3... Lens holding frame, 4... Rotating member (manual ring)
, 5... Display window, 6... Rotating member, 7, 8... Interlocking plate, 9... Fixed lens barrel, 12... Holding member, 13
... Rotating shaft member, 14 ... Gear, 15 ... Friction spring, 20 ... Switching knob, 21 ...
Gear, 34... Drive motor.

Claims

【実用新案登録請求の範囲】１撮影光軸回りに回転可能でかつ共に内歯ギア
又は外歯ギアが形成されている一方及び他方の二
つの大径ギアであつて、回転によつてレンズ保持
枠を光軸方向に移動させる上記一方の大径ギア、
及び手動回転操作のために設けられた上記他方の
大径ギアと、これら二つの大径ギアのギアに対向
して径方向の位置調整が可能に鏡筒固定部に組み
付けられた小径ギアの保持部材とを備えたレンズ
鏡筒であつて、この保持部材には、上記大径ギア
の母線方向に沿つて第１及び第２の二位置間で移
動可能に設けられていて、かつ上記一方の大径ギ
アと常時連係回転するギアをもつた伝達系切換え
用の回転軸部材と、モータにより回転される駆動
ギアと、上記第１の位置で上記他方の大径ギアに
係合し、かつ上記第２の位置で上記駆動ギアに係
合するように上記回転軸部材と同一軸上に設けら
れた係脱ギアとが一体に組み付けられていること
を特徴とするレンズ鏡筒。２上記小径ギアの保持部材に、駆動ギアの駆動
用モータが一体に組み付けられていることを特徴
とする請求項１に記載したレンズ鏡筒。３上記回転軸部材が、鏡筒外部から手動操作可
能の位置切換手段に連係されていることを特徴と
する請求項１又は２に記載したレンズ鏡筒。[Claims for Utility Model Registration] 1. Two large-diameter gears, one and the other of which are rotatable around the photographing optical axis and both of which are formed with internal gears or external gears, which hold the lens by rotation. one of the large diameter gears mentioned above that moves the frame in the optical axis direction;
and holding the other large-diameter gear provided for manual rotation operation, and a small-diameter gear assembled to the lens barrel fixing part so as to be able to adjust its position in the radial direction in opposition to these two large-diameter gears. a member, the holding member is provided so as to be movable between two positions, first and second, along the generatrix direction of the large-diameter gear; a rotating shaft member for transmission system switching having a gear that constantly rotates in conjunction with the large-diameter gear; a drive gear rotated by a motor; A lens barrel characterized in that a locking/disengaging gear provided on the same axis as the rotating shaft member is integrally assembled so as to engage with the driving gear at a second position. 2. The lens barrel according to claim 1, wherein a drive motor for the drive gear is integrally assembled with the holding member for the small diameter gear. 3. The lens barrel according to claim 1 or 2, wherein the rotating shaft member is linked to a position switching means that can be manually operated from outside the lens barrel.