Optical Scanning Device Lower Frame Wall Segmentation
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Solution Overview
Problem
The deformation of retaining walls in optical scanning devices due to biasing members can compromise the precise positioning of optical elements, such as f-theta lenses, leading to inadequate support and image formation issues.
Innovation Solution
The optical scanning device incorporates a scanner frame with a lower frame structure that includes multiple walls and a biasing member, where the f-theta lens is pressed against the first wall between the connecting positions of the second and third walls, distributing the biasing force across multiple supports to prevent deformation and ensure precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a biasing member presses the optical element against the retaining wall, then the optical element is supported and positioned, but the retaining wall deforms due to the pressing force
Solution Approach 1:
The retaining wall is divided into multiple segments (first retaining wall, second retaining wall, third retaining wall) that are connected to the frame at different positions. This segmentation distributes the pressing force from the biasing member across multiple connection points, preventing deformation of any single wall segment while maintaining optical element positioning.
Solution Approach 2:
The retaining walls are extended in multiple directions (first wall extends in first direction, second wall extends in second direction, third wall extends in third direction) to create a three-dimensional support structure. This multi-directional arrangement distributes the pressing force across different spatial dimensions, enhancing overall structural stability.
2Manufacturing precision
If the retaining wall is made more rigid to prevent deformation, then positioning precision improves, but the device complexity increases
Solution Approach 1:
The multiple retaining walls serve multiple functions simultaneously: they provide positioning support for the optical element, distribute the pressing force from the biasing member, and maintain structural rigidity. This multi-functionality achieves precise positioning without requiring overly complex individual components.
Solution Approach 2:
The first, second, and third retaining walls are merged into a unified frame structure that works together to support the optical element. The biasing member is integrated with this multi-wall structure, combining the positioning function with the force distribution function in a single coordinated system.
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
This configuration enhances the rigidity of the retaining walls, preventing deformation and ensuring the f-theta lens is accurately supported, thereby maintaining precise image formation and scanning performance.
Implementation Method 1
The biasing member presses the optical element against the first wall
Data Source
AI summary
In an optical scanning device, a lower frame includes a first wall contacting an optical element, a second wall connected to a second-wall connecting portion of the first wall, a third wall connected to a third-wall connecting portion of the first wall, and a biasing member having a first end contacting the optical element and a second end supported by a scanner frame to press the optical element against the first wall. The second wall extends in a traverse direction angled with respect to a direction in which the first wall extends. The third wall extends in a direction facing away from an optical element side of the first wall on which the optical element is located. The optical element is in contact with at least one position of the first wall which position is between the second-wall connecting position and the third-wall connecting position.