| 摘要 |
<p>A housing tube device and an imaging device that have a support means for supporting two or more optical part holding frames for holding optical parts, the support means supporting the optical part holding frames so that they are individually linearly movable in an optical axis direction. The housing tube device has two or more optical part holding frames having first guiding grooves at which optical parts are held and that are extended in an optical axis direction and arranged in parallel to each other; a housing tube for receiving the two or more optical part holding frames such that the frames are arranged in the optical axis direction with their optical axes aligned and having second guiding grooves facing the first guiding grooves; and rolling body units rollably interposed between the first guiding grooves and the second guiding grooves. Between adjacent optical part holding frames of the two or more optical part holding frames, the positions of the first guiding grooves and the second guiding grooves, and rolling body units interposed between the guiding grooves are displaced from each other in the circumferential direction of the optical parts so that they are alternately received between each other. The entire housing tube device can be downsized without increasing the outer diameter of the housing tube device.</p> |
