Dust-Proof Case With Elastic Lid For Projector Light Source
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Solution Overview
Problem
Existing projector designs face challenges in achieving consistent dust-proof performance due to the reliance on post-assembly seal members, which increase fabrication time and are sensitive to the skill level of assembly personnel, leading to varying dust-proof effectiveness across the outer circumferential portions of the light source unit case.
Innovation Solution
A dust-proof case design featuring a lid member with an elastic portion that includes corner and straight-line portions, where the circumferential cross-sectional area is narrower at the corner portions than at the straight-line portions, providing uniform adhesion force and enhanced dust-proofing capabilities by integrating the elastic member into the lid member's structure before assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tape-like seal member is affixed to an edge portion of a top panel after assembly, then dust-proof performance can be enhanced, but the number of manhours for fabrication increases and dust-proof performance varies depending on assembly skill level
Solution Approach 1:
The elastic member is attached in advance to the outer circumference of the top panel during the panel fabrication process, rather than being affixed after assembly. This preliminary action integrates the sealing function into the panel manufacturing stage, reducing subsequent assembly steps and standardizing the dust-proof performance across all units regardless of assembler skill level.
Solution Approach 2:
The invention merges the top panel structure with the elastic seal member by attaching the seal member to the panel's outer circumference during fabrication. This integration combines the structural panel and sealing function into a single standardized component assembly, eliminating the need for separate post-assembly sealing operations.
2Reliability
If a tape-like seal member is affixed to an edge portion of a top panel, then dust-proof performance can be enhanced, but the dust-proof performance differs depending on outer circumferential portions of the top panel
Solution Approach 1:
The elastic member is designed with non-uniform cross-sectional dimensions, where the circumferential cross-sectional area at corner portions is smaller than at straight-line portions. This local variation compensates for geometric differences in the panel's outer circumference, ensuring that the abutment force and sealing pressure are uniform across all portions including corners and straight edges, thereby achieving consistent dust-proof performance throughout.
3Manufacturing precision
If the circumferential cross-sectional area of the elastic portion is made narrower at corner portions than at straight-line portions, then uniform adhesion force is achieved, but the elastic portion geometry becomes more complex
Solution Approach 1:
The elastic member incorporates localized geometric variations where corner portions have smaller circumferential cross-sectional areas compared to straight-line portions. This targeted local modification optimizes the distribution of abutment force across the panel's outer circumference, ensuring uniform sealing pressure while maintaining overall geometric simplicity through a straightforward cross-sectional area variation pattern.
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 enhances dust-proof performance by ensuring consistent sealing across the light source unit case, reducing the risk of dust intrusion and simplifying the assembly process, while maintaining accurate fixation of optical members and light source devices within the case.
Implementation Method 1
an elastic portion that is in abutment with an inner surface of the wall portion and rested on the lid member resting surface
Data Source
AI summary
A dust-proof case includes a case main body having a lid member resting surface that is formed on an outer circumferential portion and a wall portion that is formed on an outer circumferential side of the lid member resting surface, and a lid member having a lid member main body having a plurality of corner portions and an elastic portion that is in abutment with an inner surface of the wall portion that is formed on an outer circumference of the lid member main body and rested on the lid member resting surface, and the elastic portion includes the plurality of corner portions and a straight-line portion in a circumferential shape thereof, and a circumferential cross-sectional area of the elastic portion is narrower at the corner portion than at the straight-line portion.