Flip-Up Helmet Visor Coupling With Position Memory
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Solution Overview
Problem
Existing protective helmets with flip-up mechanisms often result in the visor inadvertently changing positions during pivoting, leading to discomfort and aerodynamic inefficiencies due to the visor being fixed relative to the chin part, causing it to close unexpectedly.
Innovation Solution
A coupling mechanism that 'remembers' the visor's previous position relative to the chin part, allowing it to return to its original position after pivoting, providing a memory function for the visor's position during chin part movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the visor is fixed relative to the chin part, then the chin part and visor move together during pivoting, but the visor inadvertently changes position and closes unexpectedly, leading to discomfort and aerodynamic inefficiencies
Solution Approach 1:
The coupling mechanism is divided into separate functional components: a first coupling element connected to the chin part, a second coupling element connected to the visor, and a memory element that stores the visor's initial position. This segmentation allows independent control of the chin part pivoting while maintaining visor position stability through the memory function.
Solution Approach 2:
The memory element provides feedback about the visor's initial position to the coupling mechanism. When the chin part is pivoted and returned to its initial position, the memory element enables the visor to return to its original position rather than remaining in an intermediate or closed state, thus preventing unexpected visor closure.
2Adaptability or versatility
If the chin part is pivoted to the upper position with the visor in the open position, then the visor either remains in its position relative to the helmet shell or moves further towards the open position, but the chin part and visor move towards each other causing the visor to close when the chin part returns
Solution Approach 1:
The memory element stores the visor's initial position before the chin part is pivoted to the upper position. This preliminary recording of the position state ensures that when the chin part returns to its initial position, the visor can be reliably restored to its original position rather than moving to an unpredictable state.
Solution Approach 2:
The coupling mechanism acts as an intermediary between the chin part and the visor. It decouples their movements by allowing the chin part to pivot independently while the visor remains stationary or moves minimally, preventing the unwanted interaction where the visor closes when the chin part returns to its initial position.
3Stability of the object's composition
If the visor is moved to the closed position with the chin part in the upper position, then the visor maintains its position relative to the chin part, but pivoting the chin part back to the lower position causes the visor to follow and close, which does not correspond to the state before pivoting
Solution Approach 1:
The memory element provides feedback about the visor's position state to the coupling mechanism. When the chin part is pivoted back to its initial position, this feedback enables the visor to return to its original position rather than following the chin part's movement, thus preventing loss of position information and restoring the initial state.
Solution Approach 2:
The memory element creates a copy or record of the visor's initial position. This copied position information is used by the coupling mechanism to restore the visor to its original state after the chin part has been pivoted, effectively copying the initial position configuration rather than allowing the visor to follow the chin part's movement.
Data Source
AI summary
A motorcycle helmet, having a helmet shell, a chin part for covering a chin portion of a wearer, and a visor, uses a coupling mechanism by means of which the chin part is fastened to the helmet shell and pivotable between a lower position and an upper position. With the chin part in the lower position, by means of the coupling mechanism, the visor can assume a respective pivoting position between a closed position and an open position. The coupling mechanism is further designed, upon pivoting of the chin part from the upper position into the lower position after the chin part has previously been pivoted from the lower position into the upper position, to cause the visor to occupy a pre-pivoting position differing from the closed position, which pre-pivoting position the visor occupied before the pivoting of the chin part from the lower position into the upper position.