Light Scanning Apparatus Dust-Proof Member Groove Design
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Solution Overview
Problem
The degradation of sealability in light scanning apparatuses due to deformation of the upper cover and fatigue of the sealing member, leading to reduced dust-proof performance and image quality issues in high-speed image forming processes.
Innovation Solution
A light scanning apparatus with a dust-proof member featuring an abutment portion and non-abutment portions with a groove, which reduces the repulsion force and prevents deformation-induced gaps, maintaining sealability and dust-proof performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing member is pressed to secure sealability, then dust-proof performance is improved, but the upper cover deforms and the sealing member fatigues
Solution Approach 1:
The dust-proof member is designed with differentiated regions: an abutment portion that contacts the optical box and non-abutment portions with grooves that do not contact. This local differentiation allows the abutment portion to provide sealing while the grooved non-abutment portions absorb repulsion forces, preventing deformation of the upper cover and fatigue of the sealing member.
2Stability of the object's composition
If the upper cover is fastened with screws to reduce deformation, then structural stability is improved, but the sealing member still experiences fatigue degradation
Solution Approach 1:
The dust-proof member incorporates grooves in the non-abutment portions to locally absorb repulsion forces, reducing the overall stress on the sealing member and preventing fatigue degradation while maintaining structural stability.
Solution Approach 2:
The grooves in the non-abutment portions act as pre-designed stress relief zones that absorb repulsion forces before they can cause fatigue degradation of the sealing member, providing beforehand cushioning against the harmful effects of continuous pressing.
3Reliability
If the upper cover deforms from initial use, then dust-proof performance degrades, but the problem occurs early rather than over time
Solution Approach 1:
The grooved non-abutment portions are specifically designed to absorb repulsion forces from the initial pressing operation, preventing deformation of the upper cover even during first use, thereby maintaining dust-proof performance from the start.
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 degradation in the degree of sealing and maintains dust-proof performance by dissipating repulsion forces, ensuring consistent image quality and extended apparatus lifespan.
Implementation Method 1
there may occur deformation of the upper cover due to a repulsion force of the pressed sealing member
Data Source
AI summary
Provided is a light scanning apparatus, including: a light source; a rotary polygon mirror; an optical member guiding a light beam; an optical box on which the light source is mounted and which contains the rotary polygon mirror and the optical member; a cover covering an opening of the optical box; a fixation unit fixing the cover on the optical box; the cover having a dust-proof member which is sandwiched between the cover and a side wall of the optical box; and the dust-proof member including an abutment portion against which the side wall is brought into abutment, and non-abutment portions provided on both sides of the abutment portion and separated from the side wall, and the dust-proof member including a groove in one of the non-abutment portions which is located on a side opposite to another one located on a side where the fixation unit is provided.