Walker Frame Stability via Lift Arm Locking Mechanism
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Solution Overview
Problem
Current mobility walkers with side-to-side folding mechanisms often spread apart under user pressure, interfere with stride, and have inadequate friction, limiting mobility and control during use, and require frequent replacement of worn-out friction feet.
Innovation Solution
A mobility walker with a folding frame assembly that converts between narrow and wide positions using lift arms, non-swiveling wheels, and high-stiction friction pads, along with forward-facing LED lights on handles, designed to maintain stability and control without structural interference with the user's stride.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the walker frame is designed to fold side-to-side for compact storage, then the storage compactness is improved, but the frame stability deteriorates because the frame spreads apart under user pressure
Solution Approach 1:
The patent implements a dynamic folding mechanism where the frame members are hinged to allow side-to-side folding for compact storage, while simultaneously incorporating a locking mechanism that engages when the frame is in the open position to prevent spreading under user pressure. This dynamic design allows the frame to transition between compact and stable states as needed.
Solution Approach 2:
The locking mechanism is designed to engage automatically or pre-positioned elements that counteract the spreading force before it can occur. The structural elements are positioned and configured to resist the outward force generated when users apply downward pressure on the hand grips, preventing the frame from spreading apart during use.
2Stability of the object's composition
If structural members are added to prevent frame spreading, then the frame stability is improved, but the user's stride capability deteriorates due to interference
Solution Approach 1:
The patent applies structural reinforcement and locking mechanisms specifically at critical locations where spreading forces occur (such as at the hinge points and connection joints) rather than adding continuous structural members throughout the entire frame. This localized approach provides necessary stability while leaving the lower portion of the frame open to allow unrestricted user stride.
Solution Approach 2:
The locking mechanism operates in a different spatial dimension or plane than the user's walking motion. The structural elements are positioned to resist spreading forces horizontally while maintaining vertical clearance and lateral space that does not interfere with the user's natural stride pattern during walking.
3Ease of manufacture
If traditional friction feet are used, then the manufacturing simplicity is improved, but the control performance deteriorates due to insufficient friction and frequent wear
Solution Approach 1:
The patent employs composite friction pads that combine materials with high friction coefficients and wear resistance properties. These composite materials provide superior grip and control performance compared to traditional single-material friction feet, while the modular design allows for easy replacement without complex manufacturing processes.
Solution Approach 2:
The friction pads are designed with optimized material properties and geometric parameters (such as surface area, texture, and composition) to maximize friction force and wear resistance. By changing the material parameters and physical characteristics of the friction surface, the patent achieves enhanced control performance and extended service life.
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 provides a compact, stable, and controlled walking experience by maintaining frame stability under user pressure, enhancing mobility and reducing friction-related issues, while allowing upright storage and improved control through adjustable LED lights.
Implementation Method 1
employs friction inducing pads to improve control of the forward motion of the walker
Data Source
AI summary
A mobility assisting walker device with a folding frame assembly, a pair of non-swiveling wheels, a pair of friction pads, a pair of support handles and a pair of lift arms is disclosed. The non-swivel wheels are mounted to the bottom front portion of the folding frame and the friction pads mounted to the bottom rear portion of the frame. The support handles are mounted to the top portion of the frame assembly. The lift arms are each attached to the outer slidable juncture of the frame. The folding frame assembly is capable of going from a narrow, storage position to a wide use position by a user raising or lowering the lift arms. The frame assembly configured to allow the user to have maximum stride capability while using the walker device. A preferred embodiment includes the friction pads are constructed from injection molded high sticktion TPE plastic.