Scanning Exposure Device Cover Fixed Position Arrangement
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Solution Overview
Problem
Scanning exposure devices face issues due to housing deformation caused by heat expansion, leading to distortion and variations in scan width, affecting image formation accuracy.
Innovation Solution
A scanning exposure device design featuring a cover with paired fixed positions on the sidewalls, arranged such that the main scanning direction passes between them, to counteract the expansion forces and maintain rigidity, preventing distortion and maintaining consistent scan width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the housing and cover are fixed together with fixed positions arranged parallel to the main scanning direction, then the structure is simple and easy to manufacture, but the housing deforms due to heat expansion causing scan width variation
Solution Approach 1:
The fixed positions on the cover are arranged asymmetrically with respect to the main scanning direction. Specifically, the first fixed position is located at a first position on the first sidewall and the second fixed position is located at a second position on the second sidewall, where the arrangement is not symmetric about the centerline parallel to the main scanning direction. This asymmetric arrangement creates a mechanical constraint that counteracts the thermal expansion forces, preventing the housing deformation that would otherwise cause scan width variation.
2Stability of the object's composition
If the cover is fixed at multiple positions, then the structural stability improves and housing deformation is reduced, but the manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The cover is designed with different local properties at different fixed positions. The first fixed position and the second fixed position are strategically located at specific local areas of the sidewalls where they provide the most effective constraint against thermal expansion. This localized optimization allows the structure to achieve maximum stability with minimal fixed positions, simplifying both manufacturing and assembly while effectively preventing housing deformation.
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 stabilizes the housing and reflecting members, reducing scan width variations and improving image formation accuracy by managing thermal expansion and maintaining structural integrity.
Implementation Method 1
a reflecting member that has a width extending from a first end to a second end in a main scanning direction, to reflect a light irradiated by an irradiating unit
Implementation Method 2
Such a housing and cover may expand and be deformed due to heat
Data Source
AI summary
A scanning exposure device includes: a reflecting member that reflects a light irradiated by an irradiating unit; a housing that has a bottom, a first sidewall, a second sidewall, and an aperture opening in a direction of a light reflected by the reflecting member; a cover that covers the aperture, forms a passing portion that allows the light reflected by the reflecting member to pass through, and provides a first fixed position at which the housing is fixed on the first sidewall and a second fixed position, paired with the first fixed position, at which the housing is fixed on the second sidewall, wherein the first fixed position and the second fixed position are arranged such that the main scanning direction passes between them.