Dovetail Closing Member for Accurate Semiconductor Light Source Sealing
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Solution Overview
Problem
Existing electronic devices, such as projectors, face challenges in maintaining high positioning accuracy and dustproofness when attaching semiconductor light emitting elements due to the interference of seal members, which can lead to improper positioning and reduced attaching accuracy.
Innovation Solution
The use of dovetail-shaped engaging and engagement portions between the fixing target portions and closing members, where the inner circumferential surface of the closing member is brought into abutment with the outer surface of the fixing object member, and the outer surface of the closing member is abutted with the inner surface of the wall portion, facilitating a secure and accurate attachment while preventing compression in the insertion direction, thus reducing torsion and enhancing sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a closing member is used to seal the fixing target portion, then dustproofness is improved, but positioning accuracy deteriorates due to interference with the fixing object member
Solution Approach 1:
The closing member is divided into two functional parts: a sealing portion that contacts the fixing object member for dustproof sealing, and a closing portion that engages with the fixing target portion. This segmentation allows the sealing function and positioning function to be separated, eliminating interference between them and resolving the contradiction between dustproofness and positioning accuracy.
2Object-affected harmful factors
If the closing member compresses the fixing object member to enhance sealing, then dustproofness is improved, but positioning accuracy deteriorates due to compression in the insertion direction
Solution Approach 1:
The closing member applies compression force locally at the sealing portion that contacts the fixing object member, while the closing portion engages with the fixing target portion to prevent overall compression in the insertion direction. This local quality approach ensures sealing effectiveness without compromising positioning accuracy.
3Stability of the object's composition
If the closing member is designed to engage with the fixing target portion, then structural stability is improved, but positioning accuracy deteriorates due to torsion during attachment
Solution Approach 1:
The closing member features an asymmetric dovetail-shaped engagement portion with a slope angle that is optimized to receive the fixing object member without causing torsion during attachment. The asymmetric design allows the closing member to engage securely with the fixing target portion while maintaining positioning accuracy by preventing rotational forces.
Data Source
AI summary
An electronic device includes a fixing object member, a case including a fixing target portion that includes a wall portion having a dovetail-shaped engaging target portion and to which the fixing object member is fixed, and a closing member including a dovetail-shaped engagement portion configured to be brought into engagement with the dovetail-shaped engaging target portion and in which an inner circumferential surface thereof is brought into abutment with an outer circumferential surface of the fixing object member and an outer circumferential surface thereof is brought into abutment with an inner circumferential surface of the wall portion.