Movable Forehead Shield for Ballistic Helmet Visor Interference
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Solution Overview
Problem
The use of a forehead shield with a ballistic protective helmet often prevents the conventional visor from being opened due to spatial interference, leading to reduced wearing comfort and increased torque on the helmet.
Innovation Solution
A forehead shield that is attached to the helmet in a displaceable manner, allowing the visor to move freely when opened or closed, eliminating the need for the visor to slide over the shield and maintaining wearing comfort by using a removable and slidable attachment mechanism, such as an enclosure or rail system, with Velcro applications for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a forehead shield is attached to the helmet cap using a fixed method, then the protective effect is improved, but the visor cannot be opened due to spatial interference
Solution Approach 1:
The patent applies a dynamic attachment mechanism where the forehead shield can move relative to the helmet cap. The shield is connected via a mounting mechanism that allows displacement in at least one degree of freedom, enabling the shield to move when the visor opens or closes, thus eliminating spatial interference while maintaining protective coverage.
2Ease of operation
If the visor is designed to slide over the front shield, then the visor can be opened, but the weight and extended lever arm increase the torque on the helmet, reducing wearing comfort
Solution Approach 1:
Instead of designing the visor to slide over a fixed shield, the patent makes the shield itself dynamic. The shield moves with the visor motion, allowing a conventional visor design without extended lever arms or additional sliding mechanisms, thereby maintaining wearing comfort.
3Device complexity
If a conventional visor is used with a fixed forehead shield, then the visor design is simple, but the shield prevents the visor from being opened
Solution Approach 1:
The patent resolves this contradiction by making the forehead shield dynamic rather than modifying the visor. The shield's ability to move relative to the helmet cap allows a conventional, simple visor design to function properly without spatial interference.
4Weight of moving object
If the forehead shield is made detachable using Velcro attachment, then the shield can be removed to reduce weight, but the attachment strength may be insufficient for high-impact situations
Solution Approach 1:
The patent combines detachable attachment (e.g., Velcro) with a dynamic mounting mechanism. The Velcro allows easy attachment and removal for weight reduction, while the dynamic mounting mechanism ensures the shield remains securely positioned during use and provides sufficient stability for protective function.
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
Enables the use of a conventional visor with a forehead shield without compromising safety or comfort, allowing for adaptable ballistic protection and easy conversion between visor-equipped and visor-less configurations, while preventing mechanical processing that could diminish the shield's protective effect.
Implementation Method 1
Velcro applications, for example, are preferred as fastening options
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
The present invention relates to a forehead shield (3) for a ballistic protective helmet (2), which is arranged to move with the visor when the visor (4) of the protective helmet is opened and closed.