Patent ID: 8926103
Filing Date: 2015-01-06
Classification: G03B

Abstract:
1. A barrier mechanism including a barrier blade group having at least two barrier blades which are rotatably retained by a single spindle, at least one barrier blade among the barrier blades being configured to be driven to rotate, and the rest of the barrier blades being configured to rotate following the rotation of the driven barrier blade, the barrier mechanism placed on a front face of an optical lens, the barrier mechanism configured the barrier mechanism comprising: an elastic member provided to the spindle substantially coaxially with a rotating center of the barrier blade group, and configured to generate torque for driving the one barrier blade to rotate; and a frame member formed of two plate-shaped members each including an aperture serving as a window for opening the effective optical path of the optical lens, and configured to house the barrier blade group and the elastic member between the two plate-shaped members, wherein the spindle includes a flange portion configured to separate the barrier blade group from the elastic member in a direction of an optical axis.