| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rectilinear movement guide mechanism of a lens barrel, which has a structure simple and compact in an optical-axis direction and is capable of increasing a movement amount of a rectilinearly moving member in the optical-axis direction. <P>SOLUTION: In a rectilinear movement guide mechanism of a lens barrel including a rectilinearly moving member which is rectilinearly moved in an optical-axis direction by rotation of a rotating ring supported so as to be rotatable with respect to a fixing member, a movable rectilinear movement guide member is provided which can be rectilinearly moved in the optical-axis direction and is moved in the optical-axis direction relatively to the fixing member and the rectilinearly moving member by rotation of the rotating ring. The movable rectilinear movement guide member is provided with a movable guide part for rectilinearly guiding the rectilinearly moving member in the optical-axis direction, and the fixing member is provided with a fixed guide part for rectilinearly guiding the rectilinearly moving member in the optical-axis direction. A movement range of the linearly moving member rectilinearly guided by the movable guide part and a movement range of the rectilinearly moving member rectilinearly guided by the fixed guide part are mutually different while being partially overlapped. <P>COPYRIGHT: (C)2012,JPO&INPIT |
