Optical scanner and image forming apparatus
First Claim
Patent Images
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 including a stress alleviating section, anda movable plate-side shaft section connecting the stress alleviating section and the movable plate, anda drive section-side shaft section connecting the stress alleviating section and the turnable drive section, andthe movable plate-side shaft section have a lower torsional stiffness than the drive section-side shaft section with comparing the movable plate-side shaft section with the drive section-side shaft section.
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Abstract
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.
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Citations
20 Claims
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1. An optical scanner comprising:
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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, and a shaft section which connects the movable plate and the turnable drive section, the shaft section including a stress alleviating section, and a movable plate-side shaft section connecting the stress alleviating section and the movable plate, and a drive section-side shaft section connecting the stress alleviating section and the turnable drive section, and the movable plate-side shaft section have a lower torsional stiffness than the drive section-side shaft section with comparing the movable plate-side shaft section with the drive section-side shaft section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification