Anchor Device Abutting Portion Displacement
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Solution Overview
Problem
Existing anchor devices require high loads to position an abutting portion on a second member, limiting the movement stroke and efficiency in coupling vehicle body and webbing sides.
Innovation Solution
The anchor device incorporates an abutting portion on the first member that rides up onto the second member, with the abutting portion's position displaced in the movement-width direction, reducing the required load and increasing the movement stroke, and optionally providing abutting portions on both sides of the second member to prevent relative displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the abutting portion is positioned directly above the second member's movement path, then the device size is reduced, but the load required to ride up onto the second member becomes excessively high
Solution Approach 1:
The patent applies dimensional change by displacing the abutting portion not only in the movement direction but also in the movement-width direction. This creates an offset position that is neither directly above nor directly beside the second member's path, effectively using a two-dimensional offset to resolve the force-stroke contradiction. The abutting portion is positioned at coordinates (x, y) where x is the displacement in movement direction and y is the displacement in movement-width direction, creating an optimized ride-up path.
Solution Approach 2:
The patent changes the positional parameters of the abutting portion relative to the second member. Specifically, it defines the position by two displacement parameters: displacement in the movement direction and displacement in the movement-width direction. By optimizing these parameters, the patent reduces the peak load while maintaining an acceptable movement stroke, transforming a single-parameter optimization problem into a two-parameter optimization.
2Force
If the abutting portion is displaced in the movement-width direction, then the movement stroke is lengthened and load is reduced, but the device size increases
Solution Approach 1:
The patent optimizes the positional parameters of the abutting portion by defining its location through displacements in both the movement direction and movement-width direction. This two-parameter optimization allows finding a balance point where the load is sufficiently reduced while the increase in device volume is minimized and acceptable.
3Stability of the object's composition
If abutting portions are provided on both movement-width direction sides of the second member, then relative displacement in the movement-width direction is suppressed, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the single abutting portion function into multiple discrete abutting portions positioned on both sides of the second member in the movement-width direction. Each abutting portion independently contacts the second member, and their combined action suppresses relative displacement more effectively than a single portion. This segmentation transforms a single-point contact into a distributed multi-point contact system.
Solution Approach 2:
The patent merges the functions of multiple abutting portions to achieve enhanced stability. The abutting portions on both sides work together in unison to constrain the second member's movement, combining their individual contact forces into a collective stabilizing effect that suppresses relative displacement in the movement-width direction.
Data Source
AI summary
An anchor device including: a first member that is coupled to one out of a vehicle body side or a webbing side; a second member that is coupled to the other out of the vehicle body side or the webbing side, and that is retained by the first member by being passed through the first member and being moved with respect to the first member; and an abutting portion that is provided to the first member and is configured to ride up onto the second member with a position where the second member abuts the abutting portion displaced in a movement-width direction of the second member and in the opposite direction to a movement direction of the second member when the second member is moved with respect to the first member.