Walker Rack and Pinion Front Leg Adjustment
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Solution Overview
Problem
Conventional walkers are rigid and unable to adjust for uneven surfaces such as stairs, curbs, and sidewalks, limiting access for individuals with mobility limitations to places without ramps, lifts, or elevators.
Innovation Solution
A walker with a frame assembly and a rack and pinion system that allows selective vertical adjustment of the front legs relative to the back legs, enabling the device to engage and support the user on multiple surfaces, maintaining stability on uneven terrain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the walker is made rigid with fixed leg positions, then the structural stability and simplicity are improved, but the adaptability to uneven surfaces deteriorates
Solution Approach 1:
The walker employs a dynamic leg positioning system where the front legs can be selectively adjusted to different vertical positions relative to the back legs. This allows the walker to adapt its structure to match uneven surfaces such as stairs, curbs, and sidewalks, resolving the contradiction between structural stability and adaptability to varying terrains.
Solution Approach 2:
The walker's leg structure is segmented into adjustable front legs and fixed back legs, with intermediate members enabling selective vertical adjustment. This segmentation allows independent positioning of front legs to accommodate different surface elevations while maintaining overall structural integrity, addressing both stability and adaptability requirements.
2Ease of manufacture
If the walker structure is made simple and rigid, then the ease of manufacture and device complexity are improved, but the ability to traverse uneven surfaces deteriorates
Solution Approach 1:
The walker incorporates a dynamic adjustment mechanism using rack and pinion systems that allow selective vertical positioning of front legs. This mechanical solution provides adaptability to uneven surfaces while maintaining relatively simple manufacturing processes and structure, balancing ease of manufacture with enhanced functionality.
3Device complexity
If the walker has fixed leg positions, then the device complexity is reduced, but the accessibility to places with uneven surfaces deteriorates
Solution Approach 1:
The walker features selectively adjustable front legs that can be positioned at different vertical heights to accommodate stairs, curbs, and other uneven surfaces. This dynamic adjustment capability enhances accessibility while adding only moderate complexity through the use of intermediate members and adjustment mechanisms.
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 users to traverse uneven surfaces like stairs and curbs while maintaining balance and stability, allowing greater accessibility for individuals with mobility limitations.
Implementation Method 1
A walker with a frame assembly and a rack and pinion system that allows selective vertical adjustment of the front legs relative to the back legs
Data Source
AI summary
Walkers capable of adapting to surrounding environments, including stairs, curbs, sidewalks, and other surface or ground obstacles that have adjacent uneven surfaces. The walkers include a frame assembly having back legs, front legs, and a handlebar fixedly coupled to the back legs. Intermediate members respectively couple the front legs to the back legs and are configured for selective vertical adjustment of vertical positions of the front legs relative to the back legs and relative to at least a first surface engaged by lower ends of the back legs. After selective vertical adjustment of the vertical positions of the front legs, the front and back legs of the walker are capable of engaging and supporting the walker on the first surface engaged by the lower ends of the back legs and engaging and supporting the walker on at least a second surface engaged by lower ends of the front legs.