Actuator, optical scanner and image forming device
AssigneeSeiko Epson Corporation
InventorMitsuhiro YODA
Life of this patent
Estimating the term…
Abstract
An actuator includes a movable plate having a plate shape, a pair of axial parts that is elastically deformable and supporting the movable plate rotatable, and a tension adjuster adjusting tension on an axial direction of the pair of the axial parts and including a torsional axis that is formed jointly or integrally with one of the axial parts and disposed orthogonally to the axial direction of the axial parts, and a drive source that torsionally deforms the torsional axis, wherein the torsional axis is torsionally deformed through the action of the drive source and a spring constant of the pair of the axial parts is adjusted by adjusting the tension on the pair of the axial parts.
Claims3
An actuator, comprising:
- a movable plate having a plate shape;
- a pair of axial parts that is elastically deformable and supporting the movable plate rotatable;
- a tension adjuster adjusting tension on an axial direction of the pair of the axial parts;
- a driver rotating the movable plate including a permanent magnet, a coil and an electric current applicator;
- and
- a resonance frequency detector disposing on the one of the axial parts and detecting a resonance frequency of the movable plate while adjusting tension in the axial direction of the pair of axial parts.
An optical scanner, comprising:
- a movable plate having a plate shape and having a light reflecting part that has a light reflecting property and is disposed on a plate face of the movable plate;
- a pair of axial parts that is elastically deformable and supporting the movable plate rotatable;
- a tension adjuster adjusting tension on an axial direction of the pair of the axial parts;
- a driver rotating the movable plate including a permanent magnet, a coil and an electric current applicator;
- and
- a resonance frequency detector disposing on the one of the axial parts and detecting a resonance frequency of the movable plate while adjusting tension in the axial direction of the pair of axial parts.
An image forming device comprising:
- an optical scanner including:
- a movable plate having a plate shape and having a light reflecting part that has a light reflecting property and is disposed on a plate face of the movable plate;
- a pair of axial parts that is elastically deformable and supporting the movable plate rotatable;
- a tension adjuster adjusting tension on an axial direction of the pair of the axial parts;
- a driver rotating the movable plate including a permanent magnet, a coil and an electric current applicator;
- and
- a resonance frequency detector disposing on the one of the axial parts and detecting a resonance frequency of the movable plate while adjusting tension in the axial direction of the pair of axial parts.
Dependencies are inferred from the claim text.