Light scanning device and image forming apparatus

摘要

A light scanning includes an adjusting unit that displaces the optical member to adjust the optical axis of the laser beam. The adjusting unit includes a shaft portion, a shaft supporting portion, a turning portion, a driving portion, and a turning damping unit. The shaft portion is configured to bidirectionally move in a first direction and in a second direction while turning. The first direction is a direction where the shaft portion approaches the optical member. The second direction is a direction where the shaft portion moves away from the optical member. The shaft supporting portion supports the shaft portion, and moves the shaft portion in accordance with turning of the shaft portion. The turning portion turns the shaft portion. The driving portion turns the turning portion. The turning damping unit damps a turning force applied to the shaft portion by an external force.

主权项

1. A light scanning device for irradiating a scan object with a laser beam that is emitted from a laser emitting portion and reflected on a rotating polygon mirror via an optical member having a long axis in a main-scanning direction, the optical member being mounted on a housing of the light scanning device so that one end of the optical member is an axis around which the other end portion of the optical member is turnable, the light scanning device comprising
an adjusting unit configured to turnably displace the other end portion of the optical member to adjust an optical axis of the laser beam, wherein the adjusting unit includes:
a shaft portion configured to bidirectionally move in a first direction and in a second direction while turning, the first direction being a direction where the shaft portion approaches the optical member, the second direction being a direction where the shaft portion moves away from the optical member;a shaft supporting portion that is secured to the housing of the light scanning device and that is configured to support the shaft portion, and move the shaft portion in accordance with turning of the shaft portion;a turning portion configured to turn the shaft portion;a driving portion configured to turn the turning portion; anda turning damping unit configured to damp a turning force, the turning force being applied to the shaft portion by an external force, wherein the light scanning device is configured to turnably displace the other end portion of the optical member in accordance with movement of the shaft portion in the first direction or the second direction.