Optical scanner and image forming apparatus

摘要

An optical scanner includes: a light reflecting section having light reflectivity; a movable plate which includes the light reflecting section and can be displaced; four link sections connected to the movable plate; and a supporting section supporting the four link sections. The four link sections are provided on an outer circumference of the movable plate at 90-degree intervals along a circumferential direction of the movable plate in a plan view. Each link section includes a turnable drive section, and a shaft section which connects the movable plate and the drive section. The shaft section is bent and deformed in a thickness direction of the movable plate by turning the drive section.

主权项

1. An optical scanner comprising:
a light reflecting section; a movable plate provided to the light reflecting section; four link sections connected to the movable plate; and a supporting section supporting the four link sections, the four link sections are provided on an outer circumference of the movable plate at 90-degree intervals along a circumferential direction of the movable plate in an X-Y plane view, each link section includes:
a turnable drive section, anda shaft section which connects the movable plate and the turnable drive section, the shaft section being bendable and deformable in a thickness direction of the movable plate by turning the turnable drive section, and the shaft section including a stress alleviating section, wherein the stress alleviating sections each have a pair of deformation sections, and one of the pair of deformation sections is connected to a movable plate-side shaft section, and the other of the pair of deformation sections is connected to a drive section-side shaft section, and the stress alleviating sections each have a non-deformable section provided between the pair of deformation sections, the non-deformable section extending in a direction parallel to an extending direction of the deformation section, and being torsionally non-deformable about a central axis thereof.