Helmet Protective Layer Rupture for Rotational Impact
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Solution Overview
Problem
Existing helmets fail to effectively address rotational brain injuries due to complex structures and reduced linear impact absorption capabilities, with previous solutions being difficult to assemble or requiring a complete round outer shell for efficient force guidance.
Innovation Solution
A helmet with a protective layer that absorbs normal components through compression and ruptures when tangential components exceed a threshold, using closed-cell foam with varying densities and protuberances to distribute and mitigate impact forces, ensuring visible degradation upon impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If rigid rupturing means are used to absorb tangential component, then rotational impact protection is improved, but linear impact absorption capability is reduced
Solution Approach 1:
The protective layer incorporates localized weak zones with reduced material density or structural integrity at specific positions. These weak zones are strategically placed to rupture preferentially under tangential loading, absorbing rotational impact energy through controlled failure while the surrounding stronger material maintains linear impact protection capability.
2Object-affected harmful factors
If complex arrangement of shock absorbers and connectors is used, then rotational impact protection is improved, but assembly difficulty increases
Solution Approach 1:
The protective layer integrates multiple functions into a single monolithic structure. The shock-absorbing material itself contains embedded weak zones that perform both the shock absorption and the rotational impact protection functions, eliminating the need for separate connectors and assembly steps while maintaining the protective effectiveness.
3Object-affected harmful factors
If outer shell is completely round to guide impact force, then tangential force absorption is improved, but manufacturing complexity increases
Solution Approach 1:
The outer shell maintains a simple, manufacturable overall shape while incorporating localized weak zones with modified geometry or material properties. These local modifications are sufficient to guide and concentrate tangential forces into the rupture zones without requiring the entire shell to be completely round or complex in shape.
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 effectively reduces rotational brain injuries by absorbing tangential forces through controlled rupture, maintaining linear impact absorption capabilities and ensuring the helmet's unsuitability for further use after significant impact, thus preventing continued wear.
Implementation Method 1
a protective layer configured to, when the helmet is impacted by a force, absorb the normal component thereof by compression
Implementation Method 2
rupture when the tangential component of the force exceeds a predefined threshold
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
According to an embodiment, the invention relates to helmet (100) for protecting a wearer's head (107) comprising a protective layer (106) configured to, when the helmet (100) is impacted by a force (105), absorb the normal component (102) thereof by compression and rupture (211, 212, 510, 601) when the tangential component (103) of the force exceeds a predefined threshold.