Lens Barrel Helicoidal Screw Crest Reinforcement
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Solution Overview
Problem
Conventional lens barrels are prone to damage when subjected to shocks in the optical axis direction due to the lack of effective reinforcement for the crest of the helicoidal screw, which is typically made of resin and lacks sufficient strength.
Innovation Solution
A lens barrel design featuring a reinforcement structure made of a different material, such as metal, integrated into the crest of the helicoidal screw, which engages with a groove in a circumferential direction, providing enhanced durability and resistance to shocks without the need for glue or complex press-fitting processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the crest of the helicoidal screw is made from resin material to match the cylindrical member, then the manufacturing process is simplified and cost is reduced, but the strength and resistance to shock damage is insufficient
Solution Approach 1:
The patent applies composite materials by combining resin and metal in the crest of the helicoidal screw. The crest includes a resin portion matching the cylindrical member material and a metal reinforcement structure embedded within it. This composite structure provides both the manufacturing simplicity of resin molding and the shock resistance of metal, resolving the contradiction between ease of manufacture and strength.
2Strength
If a metal reinforcement structure is added to the crest of the helicoidal screw to improve shock resistance, then the strength is enhanced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges the metal reinforcement structure with the resin crest through integrated molding. The metal reinforcement is embedded within the resin material during the molding process, creating a unified component rather than separate parts requiring assembly. This merging approach enhances strength while minimizing manufacturing complexity by combining materials in a single production step.
3Strength
If the entire crest of the helicoidal screw is made from metal to maximize strength, then the shock resistance is improved, but the manufacturing cost and processing difficulty increase significantly
Solution Approach 1:
The patent applies local quality by providing metal reinforcement only in specific critical areas of the crest where shock resistance is most needed, rather than making the entire crest from metal. The metal reinforcement structure is strategically positioned within the resin crest to provide strength where required while maintaining cost-effectiveness and ease of manufacture for the remaining portions.
Data Source
AI summary
A lens barrel is provided. The lens barrel includes a first cylinder that includes at least one continuous groove on an interior surface thereof. The at least one continuous groove includes a trough of a helicoidal screw and a circumferential groove formed in a circumferential direction with respect to the first cylinder and formed in continuation with the trough of the helicoidal screw. The lens barrel also includes a second cylinder that includes a crest of a helicoidal screw that engages with the trough of the helicoidal screw and the circumferential groove and that is formed on outer circumference of the second cylinder. The crest of the helicoidal screw is formed of first material. A part of the crest of the helicoidal screw includes a reinforcement structure formed of a second material that is a different material from the first material.