Headwear Snap-Back Adjustment Mechanism with Dual-Material Overmold
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Solution Overview
Problem
Existing headwear adjustment mechanisms, such as those using elastic bands or Velcro straps, often compromise between durability and comfort, with harder plastics providing durability but causing discomfort due to their rigidity.
Innovation Solution
The integration of a dual-material snap-back adjustment mechanism, where a harder plastic spine with posts is overmolded with a softer elastomeric material, allowing for secure engagement and reduced contact pressure through apertures, combined with a textile layer for added comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If harder plastic is used for the adjustment mechanism, then durability is improved, but comfort deteriorates due to rigidity
Solution Approach 1:
The adjustment mechanism uses a composite structure combining a hard plastic spine for structural integrity and durability with a softer elastomeric overmolded material for comfort. This dual-material approach allows the connection members to maintain strength while reducing contact pressure on the wearer's head.
Solution Approach 2:
Different parts of the adjustment mechanism have different material properties: the internal spine uses hard plastic for durability, while the external surface uses soft elastomeric material for comfort. This local differentiation of material quality resolves the contradiction between durability and comfort.
2Object-affected harmful factors
If softer material is used for the adjustment mechanism, then comfort is improved, but durability deteriorates
Solution Approach 1:
The composite material structure allows the soft elastomeric overmold to provide comfort while the hard plastic spine underneath maintains structural strength and durability. The combination ensures neither comfort nor durability is sacrificed.
Solution Approach 2:
The hard plastic spine provides localized structural support and durability where needed, while the soft elastomeric material provides comfort at the contact surfaces. This spatial differentiation of material properties resolves the contradiction.
3Adaptability or versatility
If elastic bands or Velcro straps are used, then adjustability is improved, but structural integrity deteriorates
Solution Approach 1:
The adjustment mechanism is segmented into discrete connection members with specific engagement features (posts and apertures). This segmentation allows for adjustable positioning while maintaining the structural integrity of each individual component through the hard plastic spine.
Solution Approach 2:
The patent replaces elastic bands or Velcro straps with a rigid snap-fit connection system using posts and apertures. This mechanical substitution provides adjustability through discrete positioning while maintaining superior structural integrity compared to flexible materials.
Data Source
AI summary
Adjustment mechanisms for items of headwear are disclosed. An adjustment mechanism for an item of headwear includes a first connection member secured to a first side of an opening formed into a backside of the piece of headwear and a second connection member secured to a second side of the opening opposite the first side. The first connection member includes a first plastic portion having a first spine extending from a first base, and a first moldable portion secured to the first plastic portion. The first spine has a plurality of posts. The second connection member includes a second plastic portion comprising a second spine extending from a second base, and a corresponding second moldable portion secured to the second plastic portion. The second spine has a plurality of apertures. A portion of the posts of the first connection member is selectively received into the apertures.