Helmet Headband Threaded Adjustment for Precise Centering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing helmet headband adjustment mechanisms are complex, expensive, and not always practical for easy and precise fitting.
Innovation Solution
A helmet with a headband that uses a first and second adjustment device, each comprising a rotary actuator, main and secondary threaded sections, and nuts, allowing for independent or simultaneous adjustment of the headband circumference through a helical linkage system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a ratchet system with multiple predefined notches is used to adjust the headband circumference, then the headband can be adjusted to fit different head sizes, but the adjustment mechanism becomes complex and expensive to implement
Solution Approach 1:
The patent applies parameter changes by transitioning from discrete notch-based adjustment to continuous threaded rod adjustment. The threaded rod allows the headband circumference to be varied continuously by rotating the rod, which moves the occipital portion of the headband along the threading. This provides infinite adjustment possibilities within the threading range, eliminating the need for multiple predefined notches while reducing mechanical complexity.
2Adaptability or versatility
If a cord with a clamp is used to deform the neckband portion to adjust circumference, then the rear portion of the headband becomes adjustable, but the adjustment mechanism remains complex and only adjusts one portion
Solution Approach 1:
The patent applies segmentation by dividing the headband into two separate adjustable portions: the front portion and the rear portion (occipital portion). Each portion has its own independent adjustment mechanism (threaded rod), allowing both portions to be adjusted separately to achieve optimal fit. This segmented approach provides more comprehensive adjustment capability compared to deforming only the neckband portion.
3Adaptability or versatility
If threaded sections are used to act on two occipital ends of the headband to modulate circumference, then the headband can be adjusted, but the adjustment device becomes fixed within the shell limiting position flexibility
Solution Approach 1:
The patent applies dynamics by making the threaded rods removable and replaceable rather than fixed within the shell. The threaded rods can be taken out and new ones with different threading characteristics can be inserted to change the adjustment characteristics. This dynamic configuration allows the adjustment device to adapt to different user needs and head shapes, providing greater position flexibility while maintaining adjustment capability.
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 easy, precise, and continuous adjustment of the headband circumference, improving fit and comfort by maintaining the helmet's centering on the user's median frontal plane.
Implementation Method 1
The adjustment device has a threaded section and a nut that forms a helical linkage with the threaded section
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A headband (2) comprises a band (5) forming part of a ring around the user's head. An adjustment device (6) adjusts the circumference of the ring by moving one end of the band (5), which is fixed to an anchor point (9) movable relative to the body. A rotary actuator (10) is functionally linked to the adjustment device (6) by means of a transmission such that the rotation of the rotary actuator (10) causes the anchor point (9) to move. The adjustment device (6) comprises a threaded section (11) and a nut (12). Since the nut (12) and the threaded section (11) form a helical connection, the rotation of the rotary actuator (10) causes the nut (12) to move along the threaded section (11). The nut (12) or the threaded section (11) moves along a longitudinal axis of the threaded section (11) and supports the anchor point (9).