Lens holder

Abstract

Abstract PURPOSE:To enable holding of a lens in the state of having a slight offcenter by using elastic pieces in constituting the lens contact part of a retaining ring or the lens contact part of a frame. CONSTITUTION:Since a retaining ring 1 is fitted and inserted into a frame 3, both exist in the rotationally symmetrical position with respect to certain one straight line l. The alignment of the optical axis of the lens 2 to the straight line l results in holding of the lens 2 without offcenter. If the ring 1 is pushed forward into the frame 3, respective elastic pieces 12 are deformed along the contact surface 2a of the lens 2. The pieces 12 are elastically deformed so as to increase the bore of the contact part with the lens 2 in the case in which the contact surface 2a with the pieces 2a is convex. When the ring 1 is pushed beyond certain depth, the respective engaging pieces 11 of a main body 10 open to restore the shape prior to the deformation in the front side part 30a of the frame 3 owing to the elasticity of the pieces themselves and engage with the step 31 of the frame 3 by which the ring 1 is fixed to the frame 3 and the lens 2 is held between the pieces 12 of the ring 1 and the lens barrel part 32 of the frame 3.

Inventors

• 👤 Makio Yamada
• 👤 山田　満喜男

Bibliographic Details