Spring Buffered Occipital Cradle for Headgear Pressure Distribution
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Solution Overview
Problem
Existing head safety products, such as face shields and welding helmets, often suffer from poor fit, stability, and comfort due to inadequate distribution of pressure across the head, leading to discomfort and difficulty in adjustment.
Innovation Solution
A spring-buffered cradle with a concave inner surface is mounted on the horizontal band of the headgear, featuring leaf springs that absorb tension and distribute pressure more evenly, allowing for a flexible and self-adjusting fit that conforms to the head shape, particularly engaging the occipital area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid cradle is used in headgear, then structural stability is improved, but pressure distribution and comfort deteriorate
Solution Approach 1:
The patent employs a flexible cradle component with integrated leaf springs that can bend and deform to adapt to the contours of the user's head. This flexible structure replaces rigid components, allowing the cradle to conform to individual head shapes while distributing pressure evenly across the contact surface, thereby resolving the contradiction between structural stability and pressure distribution.
Solution Approach 2:
The leaf springs within the cradle are designed with varying thicknesses and lengths to create different stiffness parameters in different regions. This gradient design allows the cradle to be more compliant in areas requiring pressure distribution while maintaining adequate structural support in other areas, effectively balancing stability and comfort.
2Ease of manufacture
If a fixed cradle design is used, then manufacturing simplicity is improved, but adaptability to different head shapes deteriorates
Solution Approach 1:
The flexible cradle with leaf springs is manufactured as a single integrated component using injection molding or similar processes. The flexibility is achieved through the geometric design of the leaf springs rather than complex assembly, maintaining manufacturing simplicity while enabling the cradle to adapt to various head shapes and sizes through its inherent compliance.
Solution Approach 2:
The cradle design serves multiple functions simultaneously: it provides structural support, distributes pressure, adapts to different head shapes, and accommodates adjustments to the headgear. This multi-functionality is achieved through the flexible leaf spring structure that can perform all these roles within a single component, eliminating the need for multiple specialized parts.
3Strength
If tension is concentrated at specific points on the head, then attachment strength is improved, but comfort and stability deteriorate
Solution Approach 1:
The flexible cradle distributes attachment forces across a broader area of the head by conforming to the head's surface and spreading the load through its compliant structure. This prevents stress concentration at discrete points while maintaining secure attachment, resolving the contradiction between attachment strength and comfort.
Solution Approach 2:
The cradle is pre-formed with a contoured shape that anticipates the natural curvature of the head. This preliminary shaping ensures that when the headgear is worn, the forces are automatically distributed along the pre-configured load paths in the leaf springs, preventing stress concentration before it can occur during use.
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 solution enhances the fit, stability, and comfort of headgear by evenly distributing pressure, allowing for easy donning and doffing without frequent adjustments, while being adaptable to both new and existing headgear designs.
Implementation Method 1
A buffer spring is coupled between the cradle and the horizontal band to buffer or absorb the tension between the horizontal band and the head and more equally distribute pressure across the head
Data Source
AI summary
A headgear for a head safety product such as a face shield, hardhat or welding helmet includes a spring buffered cradle mounted on the horizontal band of the headgear to improve the fit, function, stability and comfort of the headgear. The cradle is flexible and has a concave inner surface contoured to conform to the shape of the head. A spring element is coupled between the cradle and the horizontal band to buffer the tension between the band and the head and more equally distribute pressure across the head. In a preferred embodiment, an occipital cradle includes two leaf springs coupled to the rear portion of the horizontal band.