Adjustable Helmet Shell With Flexible Portions for Snug Fit
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Solution Overview
Problem
Conventional protective helmets are mass-produced and often fail to fit a variety of head shapes and sizes, leading to discomfort and inconvenience, especially in youth sports where players may share helmets or experience changes in hairstyle or haircut.
Innovation Solution
A helmet shell with flexible side and rear portions that outwardly flex to accommodate different head sizes and shapes, featuring a base member and a hingedly attached flap member, or a single-piece design with slots allowing for expansion, and limiting straps to maintain a snug fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional mass-produced helmets are used, then manufacturing cost and simplicity are improved, but fit accuracy and comfort deteriorate
Solution Approach 1:
The helmet shell incorporates flexible portions that can dynamically deform outward when worn, allowing the same rigid shell structure to adapt to different head shapes and sizes. This dynamic flexibility resolves the contradiction by maintaining manufacturing simplicity while achieving personalized fit.
Solution Approach 2:
The shell's geometric parameters change through controlled deformation of flexible portions. By allowing these portions to flex outward, the internal volume and shape of the shell adapt to match different wearer head contours, improving fit accuracy without complicating the manufacturing process.
2Adaptability or versatility
If adjustable liners or dial-fit systems are added, then fit accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The shell is segmented into rigid and flexible portions, with the flexible portions strategically placed in regions requiring deformation. This segmentation allows the shell to self-adjust without requiring separate adjustable liners or complex dial-fit mechanisms, thereby maintaining simplicity while achieving adaptability.
Solution Approach 2:
The flexible portions of the shell automatically deform and conform to the wearer's head shape through simple outward flexing action. This self-adjusting mechanism eliminates the need for complex external adjustment systems like dial-fit mechanisms or removable liners, reducing overall device complexity.
3Strength
If the shell is made rigid for structural integrity, then strength is improved, but adaptability to different head shapes deteriorates
Solution Approach 1:
The shell structure is divided into rigid portions that maintain structural integrity and flexible portions that enable shape adaptation. This segmentation allows different regions of the same shell to serve different functions: rigidity where needed for strength, flexibility where needed for adaptability.
Solution Approach 2:
Different portions of the shell have different mechanical properties. The rigid portions provide structural strength and protection, while the flexible portions provide local adaptability to conform to the wearer's head shape. This local differentiation of material properties resolves the contradiction between overall rigidity and local flexibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The helmet shell adjusts to provide a secure and comfortable fit for various head shapes and sizes, ensuring a snug fit without requiring expensive or complex adjustment mechanisms.
Implementation Method 1
the helmet shell may include gaps or slots between the side and rear portions of the shell to facilitate outward flexing of those regions when a wearer dons the helmet
Data Source
AI summary
A helmet with an adjustable helmet shell is provided for use in sports including baseball and softball. The helmet shell is expandable and contractable to fit a variety of head shapes and sizes, and hairstyles. The helmet shell may be a single, molded piece or it may include a base member and a flap member. Gaps or slots may be located between flexible side portions and a flexible rear portion of the helmet shell. The slots facilitate outward deflection of the side portions and the rear portion when the helmet is donned. The helmet shell may be biased toward a smaller size such that once the helmet shell is expanded by the force of a wearer's head, it contracts to fit snugly and securely.