LENS BARREL HAVING DUST-PROOF DRIP-PROOF FUNCTION
To provide a lens barrel that has a dust-proof drip-proof function, and can exert an optical performance by the adjustment in an alignment process and adjustment process.SOLUTION: A lens barrel includes: a lens mirror room for holding a lens; an adjustment cylinder used for optical adjustment of the...
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Zusammenfassung: | To provide a lens barrel that has a dust-proof drip-proof function, and can exert an optical performance by the adjustment in an alignment process and adjustment process.SOLUTION: A lens barrel includes: a lens mirror room for holding a lens; an adjustment cylinder used for optical adjustment of the lens mirror room; a front ring for fixing the lens mirror room; and a dust-proof drip-proof ring. The adjustment cylinder forms a lead cam, the center line of the lead cam forms an acute angle with respect to the line perpendicular to the optical axis of the lens, and the adjustment cylinder is located outside the radial direction of the lens with respect to the lens mirror room engaging with the lead cam. The dust-proof drip-proof ring is in contact with the lens mirror room in the radial direction, and is grasped between the front ring and the adjustment cylinder in the thrust direction.SELECTED DRAWING: Figure 1
【課題】防塵防滴機能を有し、調芯工程や調整工程において調整が施されることで光学性能を発揮することの出来るレンズ鏡筒を提供することができる。【解決手段】レンズを保持するレンズ鏡室と、前記レンズ鏡室の光学調整に用いる調整筒と、前記レンズ鏡室を固定するフロントリングと、防塵防滴リングを有したレンズ鏡筒において、前記調整筒は、リードカムを形成し、前記リードカムの中心線は前記レンズの光軸と垂直な線と鋭角をなし、前記リードカムと係合する前記レンズ鏡室に対して前記レンズのラジアル方向外側に位置し、前記防塵防滴リングは、前記ラジアル方向で前記レンズ鏡室と接し、スラスト方向で前記フロントリングと前記調整筒に挟持されることを特徴とするレンズ鏡筒。【選択図】図1 |
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