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公开(公告)号：US10914964B2
公开(公告)日：2021-02-09
申请号：US16374849
申请日：2019-04-04
申请人： KOWA COMPANY, LTD.
发明人： Hirofumi Yagi
摘要： A lens barrel detachably attached to a camera body includes a fixed tube section that has a base end installed at the camera body, and a top end, a first pitch screw section being formed on an inner peripheral surface of the top end; a movable tube section that is a tube member configured to hold a plurality of lens and has a second pitch screw section on the movable tube side formed at an outer peripheral surface, and is located so as to be movable inside the fixed tube section in such a state that the second pitch screw section is threadedly engaged with the first pitch screw section, the plurality of lens including two group of lenses, a first group and a second group, held within the movable tube section. The movable tube section having a fixed diaphragm plate that is detachable.
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公开(公告)号：US10295839B2
公开(公告)日：2019-05-21
申请号：US15317192
申请日：2015-04-27
申请人： KOWA COMPANY, LTD
发明人： Hirofumi Yagi
摘要： [Problem] To make it possible to prevent vibrations or the like from causing focus or zoom slippage or the like in a lens that is mounted to a camera body that is used in a fixed location outdoors for many years for security purposes or is used inside a building that is subject to a variety of variations, such as a camera that is used for quality-checking purposes or the like at a production site in a factory.[Solution] The lens barrel (1) in this invention has the following: a fixed tube section (10) that is mounted to a camera body (B); a movable tube section (20) that is movably screwed to the fixed tube section (10); and a nut member (12) that, screwed to the movable tube section (20), is energized towards top end (10b) of the fixed tube section (10). The nut member (12) acts as a double nut, making it possible to inhibit rotation of the fixed tube section (10) and the movable tube section (20) relative to each other, preventing focus or zoom slippage or the like.
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