Web Adjuster Nonlinear Gripping Features Prevent Misalignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional web adjusters for seat belts and child seats often experience web misalignment due to the tendency of the web to slide sideways when pulled at an angle, which can reduce the load-carrying capability and increase stress during use.
Innovation Solution
The web adjuster incorporates nonlinear web gripping features, such as alternating recessed and raised portions on the frame's edges, to prevent the web from sliding sideways, combined with a tilt-lock mechanism that allows tension adjustment by tilting the adjuster, ensuring secure attachment and maintaining web tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the web is pulled at an angle through a conventional web adjuster, then the web can be adjusted for tension, but the web slides sideways causing misalignment and reduced load-carrying capability
Solution Approach 1:
The frame edge is designed with an asymmetric nonlinear shape featuring alternating recessed and raised portions. This asymmetric geometry creates differential friction zones that prevent symmetric sideways sliding while allowing the web to be pulled through for tension adjustment. The raised portions act as friction barriers that engage differently depending on pull direction, blocking lateral movement while permitting forward motion.
Solution Approach 2:
The frame edge incorporates a nonlinear curved profile rather than a straight edge. This curvature, with its alternating recessed and raised portions, creates a path that guides the web through the adjuster while preventing deviation from the intended trajectory. The curved geometry naturally resists sideways displacement through geometric constraint combined with friction.
2Adaptability or versatility
If the web adjuster allows free web movement for tension adjustment, then the web can be easily repositioned, but the web may become misaligned and stressed
Solution Approach 1:
The frame edge is designed with locally differentiated features - alternating recessed and raised portions with different friction characteristics. The raised portions create high-friction zones that prevent sideways movement, while the overall nonlinear shape allows controlled web passage for tension adjustment. This local variation in friction quality enables simultaneous adaptability and strength.
3Device complexity
If the frame has a straight edge for web passage, then the structure is simple, but the web slides sideways under angled loads
Solution Approach 1:
The frame edge transitions from a simple straight line to a nonlinear curved profile with alternating recessed and raised portions. This curved geometry, while more complex than a straight edge, provides inherent guidance that prevents sideways sliding through geometric constraint and differential friction, significantly improving web alignment reliability.
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 effectively prevents web misalignment and maintains the load-carrying capability of the web by creating friction and interference, ensuring the web remains securely in place even under load, enhancing safety and usability.
Implementation Method 1
The solution effectively prevents web misalignment and maintains the load-carrying capability of the web by creating friction and interference
Data Source
AI summary
Web adjusters and other web connecting devices for use with restraint systems are described herein. In some embodiments, web adjusters, such as tilt-lock web adjusters, can include web gripping features on an edge portion of a web aperture to prevent a web that is joined to the web adjuster from sliding or otherwise moving to one side of the web aperture or the other when the web is pulled in a direction that is not perpendicular to the edge. In some embodiments, the web gripping features can include alternating recessed and raised edge portions.