Scanning Optical Device Positioning on a Reinforced Crossing Wall
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Solution Overview
Problem
Conventional scanning optical devices face accuracy issues during positioning due to deformation of side walls, leading to improper alignment with the main body of the image-forming apparatus.
Innovation Solution
The scanning optical device incorporates a frame with a positioning part on a strengthened crossing wall, comprising first and second walls, ensuring precise alignment and stability by engaging with the support plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a protrusion is provided on a side wall for positioning, then positioning function is achieved, but positioning accuracy deteriorates due to wall deformation
Solution Approach 1:
The patent applies local quality by providing reinforcement ribs specifically at the positioning part location on the side wall, rather than reinforcing the entire frame structure. This localized reinforcement maintains positioning function while preventing deformation at the critical positioning area, thereby resolving the contradiction between achieving positioning function and maintaining positioning accuracy
Solution Approach 2:
The side wall is segmented into reinforced and non-reinforced portions through the addition of reinforcement ribs. The reinforcement ribs create distinct structural zones where the positioning part area is strengthened while other areas maintain their original design, allowing the positioning function to be preserved with improved accuracy
2Volume of moving object
If side wall is made thin for compact design, then device size is reduced, but structural stability deteriorates leading to positioning errors
Solution Approach 1:
The frame structure uses local quality by implementing reinforcement ribs only at specific critical areas (positioning parts and connection areas) rather than uniformly thickening the entire frame. This allows the majority of the frame to remain thin for compactness while critical areas gain the necessary structural stability
Solution Approach 2:
The frame is segmented into thin-walled sections for compactness and locally reinforced sections for stability. The reinforcement ribs create a composite structure where thin walls provide compact size while strategically placed reinforced zones provide the necessary structural stability for accurate positioning
Data Source
AI summary
A scanning optical device includes a light source, a deflector, a scanning optical system, and a frame. The deflector includes a polygon mirror rotatable about an axis extending in a first direction to deflect light beam from the light source. The scanning optical system is configured to form an image on an image plane using the light beam from the polygon mirror. The light source, the deflector, and the scanning optical system are fixed to the frame. The frame includes: a base wall on which the deflector is mounted; a first wall extending from the base wall toward one side in the first direction; a crossing wall extending in a direction crossing the first direction from the first wall; a second wall extending toward another side in the first direction from the crossing wall; and a positioning part provided on the crossing wall.