Helmet Chinstrap Rotational Attachment and Impact Protection
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Solution Overview
Problem
Existing chinstraps for helmets often lack sufficient security and comfort, failing to effectively mount to helmet straps while providing adequate protection and wearability.
Innovation Solution
A chinstrap design featuring a chin cup with a protective structure and an attachment assembly that secures the chin cup to helmet straps using a combination of locking pins, sleeve members, and binding posts, allowing for rotational adjustment to maintain comfort and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing chinstrap fastening mechanisms are used, then the chinstrap can be attached to helmet straps, but the attachment lacks sufficient security and stability
Solution Approach 1:
The attachment assembly is divided into separate functional components: locking pins that engage with the helmet straps, sleeve members that provide structural support and attachment points, and binding posts that secure the chin cup. This segmentation allows each component to perform its specific function optimally while maintaining overall attachment security.
Solution Approach 2:
The sleeve members are designed to receive and nest the locking pins, creating a nested structure where the locking pins fit within the sleeve members. This nested configuration provides a compact yet secure attachment mechanism that maintains reliability without excessive complexity.
2Strength
If rigid protective structures are used in the chinstrap, then impact resistance is improved, but comfort and wearability deteriorate
Solution Approach 1:
The chinstrap employs different material properties in different regions: the protective structure uses rigid, impact-resistant materials where strength is needed, while the chin cup and contact surfaces use softer, more compliant materials where comfort is prioritized. This local differentiation of material quality resolves the contradiction between impact resistance and wearability.
Solution Approach 2:
The chinstrap integrates multiple materials with different properties into a composite structure. The protective structure combines rigid impact-resistant materials with softer cushioning layers, creating a composite that provides both impact protection and comfort during wear.
3Ease of operation
If the chinstrap attachment is made adjustable with rotational movement, then comfort and fit are improved, but the attachment stability may worsen
Solution Approach 1:
The attachment assembly incorporates controlled rotational movement through the relationship between the locking pins and sleeve members. This dynamic element allows the chinstrap to adjust to different positions and angles, improving comfort and fit, while the locking mechanism maintains stability when adjusted to the desired position.
Solution Approach 2:
The sleeve members act as intermediary elements between the locking pins and the chin cup structure. They provide a controlled interface that allows rotational adjustment while maintaining secure attachment, mediating between the need for adjustability and the requirement for stability.
Data Source
AI summary
A chinstrap for a helmet. The chinstrap includes a chin cup to receive a helmet wearer's chin and a protective structure for supporting the chin cup. The chinstrap also includes an attachment assembly to secure the chin cup to straps used to secure the chinstrap to the helmet.