Optical Scanner Cover Assembly for Polygon Mirror Cleaning
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Solution Overview
Problem
High-speed rotation of the rotary polygon mirror in optical scanning devices leads to dust and dirt accumulation, reducing reflectance and affecting image quality, while existing cover solutions require removing the control substrate, risking positional changes and image defects.
Innovation Solution
An optical scanning device with a detachable cover member and engagement members that securely attach to the control substrate, maintaining positional accuracy and preventing dust intrusion, while allowing easy cleaning without disturbing the substrate's alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotary polygon mirror is rotated at high speed to increase scanning speed, then productivity is improved, but dust and dirt adhere to the reflecting surface causing reliability to deteriorate
Solution Approach 1:
A cover member is introduced as an intermediary component between the rotary polygon mirror and the external environment. This cover member selectively blocks dust and dirt from reaching the reflecting surface while allowing laser light to pass through, thus protecting reliability without compromising the high-speed rotation capability that ensures productivity
2Ease of operation
If the cover member is removed to clean the rotary polygon mirror, then ease of operation is improved, but the control substrate must be removed causing position and posture changes that deteriorate manufacturing precision
Solution Approach 1:
The attachment structure is segmented into two independent fastening systems: one set of engagement members secures the cover member to the control substrate, while another set secures the control substrate to the casing. This segmentation allows the cover member to be removed for cleaning operations without disturbing the control substrate's position, thus maintaining manufacturing precision while improving ease of operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents dust and dirt from adhering to the rotary polygon mirror, maintains image quality, and allows for easy cleaning without altering the substrate's position, thus avoiding image defects.
Implementation Method 1
a rotary polygon mirror that deflects the laser light
Data Source
AI summary
An optical scanning device configured to expose a charged surface of a photosensitive member to form an electrostatic latent image includes a light source configured to emit light, a deflector configured to deflect the light emitted from the light source, a driving unit configured to rotationally drive the deflector, a control substrate provided with the driving unit and the deflector and configured to control the driving unit, a cover member configured to cover the deflector, a casing on which the control substrate is mounted, a fixing portion configured to fix the control substrate to the casing, and a plurality of engagement members configured to jointly engage and fix the cover member and the control substrate to the casing such that the cover member is detachably attached.