Helmet Shield Rotation Stopper for Stable Indexed Positioning
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Solution Overview
Problem
Existing motorcycle helmets lack a stable mechanism to stop the shield at a predetermined position during rotation.
Innovation Solution
A shield rotation control mechanism using a support member and a stopper means with elasticity, featuring a protruding portion that slides along a slot and hooks to securely position the shield, enhanced by noise-absorbing members and serrated portions for stable fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shield rotation mechanism is provided without a stopper means, then the shield can rotate freely, but the shield cannot be stably stopped at a predetermined position
Solution Approach 1:
A stopper means is introduced as an intermediary component between the support member and base member. The stopper means includes a protruding portion that engages with a slot in the base member, acting as a mediator to provide stable stopping positions without requiring complex locking mechanisms. The elastic force from the elastic means drives the stopper means to engage with the slot, achieving reliable positioning through this intermediate element.
Solution Approach 2:
The rotation control mechanism is segmented into distinct functional components: the support member for holding the shield, the stopper means for providing stopping force, the elastic means for generating elastic force, and the slot for guiding movement. This segmentation allows each component to perform its specific function efficiently, with the stopper means being a simple yet effective element that provides stable positioning without adding overall system complexity.
2Reliability
If a rigid stopper mechanism is used to stop the shield, then the shield can be firmly positioned, but noise is generated during rotation and stopping
Solution Approach 1:
The stopper means is designed with elastic properties, changing the physical parameter of rigidity to flexibility. The elastic means provides a flexible stopping action rather than a rigid impact, allowing the protruding portion to gradually engage with the slot and reduce impact noise while still achieving firm positioning. The elastic force allows for smooth engagement and disengagement, minimizing harmful noise during operation.
3Device complexity
If the stopper means is directly coupled to the base member, then the structure is simple, but the shield cannot be reliably stopped at predetermined positions during rotation
Solution Approach 1:
The stopper means serves as an intermediary component between the support member and base member, providing reliable stopping at predetermined positions. The stopper means includes a protruding portion that engages with a slot in the base member, acting as a mediator to translate the elastic force into controlled positioning actions. This intermediate element ensures reliable stopping without requiring direct coupling or complex mechanisms.
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 mechanism allows the shield to be stably stopped at predetermined positions, providing secure and noise-reduced operation during rotation.
Implementation Method 1
an elastic force is provided toward the base member, wherein the stopper means is rotatably coupled to the support member around a rotation axis, and wherein the stopper means includes an elastic means to provide the elastic force to rotate the stopper means around the rotation axis in one direction
Implementation Method 2
when the support member rotates with respect to the base member, the protruding portion slides along the slot
Implementation Method 3
a noise absorber member is present between the stopper means and the base member
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
The present disclosure relates to a shield rotation controlling means. The shield rotation controlling means according to the present disclosure comprises: a support member (100) supporting a shield (20) and rotating about a base member (300); and a stopping means (200) coupled to the support member (100) and provided with elasticity in the direction of the base member (300), the support member (100) stopped by means of the elasticity of the stopping means (200).