Helmet Rear Strap Deflection for Earmuff-Compatible Fit
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Solution Overview
Problem
Existing protective helmets with front and rear straps face difficulties in accommodating earmuffs due to rear straps intersecting with ear cups, leading to potential slippage or impaired fit when worn with earmuffs.
Innovation Solution
A deflecting arrangement that is freely movable relative to the helmet shell engages with the rear strap to deflect it away from the ear region, ensuring a secure fit even when earmuffs are worn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rear straps are guided over ear cups to avoid slippage, then strap security is improved, but the tight fit of the protective helmet is impaired
Solution Approach 1:
A deflecting arrangement is introduced as an intermediary element between the rear strap and the ear cups. This deflecting arrangement redirects the rear strap away from the ear cups, preventing direct contact while maintaining strap security and preserving the tight fit of the helmet.
2Adaptability or versatility
If rear straps are guided along the edge of ear cups, then earmuff compatibility is improved, but the risk of strap slippage increases
Solution Approach 1:
The deflecting arrangement serves as a mediator that redirects the rear strap away from the ear cups and earmuffs. This allows the helmet to be compatible with earmuffs while eliminating the risk of strap slippage by preventing the strap from contacting the ear cups altogether.
3Stability of the object's composition
If rear straps are guided over ear cups, then strap stability is improved, but the path of the rear strap intersects with earmuffs
Solution Approach 1:
The deflecting arrangement acts as an intermediary that stabilizes the rear strap by providing a defined path while simultaneously preventing intersection with earmuffs. The deflecting arrangement redirects the strap away from the ear region, enabling earmuff compatibility without compromising strap stability.
Data Source
AI summary
In an embodiment a protective helmet includes an outer shell configured for distributing impact forces, a strap arrangement comprising at least one front strap and at least one rear strap, respectively, configured for securing the protective helmet on a head of a wearer, wherein front fastening locations of the protective helmet, at which the at least one front strap is fastened, are arranged offset with respect to rear fastening locations of the protective helmet, at which the at least one rear strap is fastened, along a longitudinal direction of the protective helmet, and a deflecting arrangement configured for lying against the head when the at least one front strap is secured and the at least one rear strap is secured, wherein the deflecting arrangement is connected to the outer shell so as to be freely movable with respect thereto and is configured for engaging with the at least one rear strap such that the at least one rear strap is deflectable away from an ear region of the head.