Cover Member Structure for PCB Protection and Stable Stacking
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Solution Overview
Problem
Existing light scanning apparatus cover members face challenges in maintaining transportation efficiency while preventing deformation and breakage, and in stabilizing the adjustment of light intensity due to the need for precise handling and potential contamination during assembly and operation.
Innovation Solution
A cover member design featuring a closing surface with protruding portions and a protection portion to safeguard the circuit board, allowing for stable stacking and efficient transportation, and ensuring the light intensity remains consistent by preventing accidental contact during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protection member is provided to cover the circuit board, then the circuit board is protected from contact and contamination, but the assembly operation becomes complicated requiring additional mounting steps
Solution Approach 1:
The protection portion is integrated into the cover member itself, merging the protection function with the existing cover structure. This eliminates the need for a separate protection member and its associated mounting steps, thereby protecting the circuit board without complicating the assembly operation.
Solution Approach 2:
The cover member is designed to serve multiple functions: it closes the opening of the housing and simultaneously provides protection for the circuit board through the integrated protection portion. This multi-functionality reduces the number of separate components and assembly steps required.
2Reliability
If a projecting portion is formed on the cover member to protect the circuit board, then the circuit board is protected, but stable stacking of multiple cover members is disabled reducing transportation efficiency
Solution Approach 1:
The protection portion is designed with specific local characteristics: the first opposed portion has a length that is shorter than the second opposed portion, creating a stepped configuration. This local quality difference allows the cover members to stack stably while maintaining circuit board protection, as the shorter first portion does not interfere with the stacking of multiple covers.
Solution Approach 2:
The protection portion extends in the depth direction from the closing surface, creating a three-dimensional stepped structure. This dimensional approach allows the cover members to stack stably on top of each other while the protection portion still effectively covers the circuit board area.
3Reliability
If the first opposed portion of the protection portion is made long to better protect the circuit board, then protection effectiveness increases, but stable stacking of cover members becomes difficult
Solution Approach 1:
The protection portion is designed with differentiated local dimensions: the first opposed portion has a length that is intentionally made shorter than the second opposed portion. This local quality difference creates a stepped configuration that provides adequate circuit board protection while maintaining stacking stability, as the shorter first portion allows proper nesting of multiple cover members.
Data Source
AI summary
A cover member to be attached to a housing including a bottom portion and a side wall, the cover member including: a closing surface configured to close an opening surrounded by the side wall; at least three protruding portions protruding from the closing surface so as to be located on an inside of the housing; and a protection portion configured to protect a circuit board fixed to the side wall, the protection portion having: a first opposed portion opposed to the circuit board and provided to stand on the closing surface; a second opposed portion opposed to the circuit board and protruding with respect to the first opposed portion away from the circuit board; and a connecting portion configured to connect the first opposed portion and the second opposed portion, wherein a length of the at least three protruding portions is larger than a length of the first opposed portion.