Combination Crutch Knee Walker Single Hinge Conversion
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Solution Overview
Problem
Existing combination crutch and knee walker devices do not allow users to conveniently switch between crutch and knee walker configurations without special tools or skillset, and knee walkers lack a mechanism to restrict wheel rotation, making them unsafe or inefficient on stairs and flat surfaces.
Innovation Solution
A combination crutch and knee walker device that converts between crutch and knee walker configurations through a single folding or expanding articulation, utilizing a pair of first support bars, a gear mechanism to restrict or enable roller rotation, and a panel that pivots to support the arm or knee, allowing seamless transition between ambulation aids without requiring special tools or skillset.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a combination crutch and knee walker device is designed to convert between configurations, then versatility is improved, but device complexity increases
Solution Approach 1:
The device is divided into modular components including first support bars, second support bars, a panel, and a gear mechanism that can independently function in both crutch and knee walker configurations. This segmentation allows each component to serve multiple purposes without requiring a complex integrated conversion system.
Solution Approach 2:
The first support bars, second support bars, and panel are designed to perform multiple functions - serving as structural supports in crutch mode and forming a mobile platform in knee walker mode. The gear mechanism universally controls wheel rotation in both configurations, eliminating the need for separate mechanisms for each mode.
2Reliability
If a gear mechanism is added to restrict wheel rotation, then safety is improved, but device complexity increases
Solution Approach 1:
The gear mechanism is designed to automatically engage and disengage based on the device configuration. When the second support bars are positioned parallel to the first support bars (crutch mode), the gear mechanism automatically restricts wheel rotation. When the second support bars are positioned at an angle (knee walker mode), the gear mechanism automatically allows free rotation, eliminating the need for manual control.
3Ease of operation
If a single folding articulation is used for conversion, then ease of operation is improved, but structural stability may worsen
Solution Approach 1:
The device employs a dynamic conversion process where the second support bars pivot relative to the first support bars through a hinged junction. This dynamic articulation allows smooth transition between configurations while maintaining structural integrity. The gear mechanism dynamically adjusts wheel rotation restriction based on the configuration, providing stability in each mode.
Data Source
AI summary
A combination crutch and knee walker device converts between a rolling knee walker configuration and a crutch configuration through a single folding or expanding articulation that requires no tools or skillset. The device includes a first support bar that forms the primary lever of support. A second support bar pivotally joins the first support bar at a hinged junction, generally three-quarters down from the top of the first support bar. The support bars fold and expand about the hinged junction to convert between crutch and knee walker. A panel hingedly joins at the hinged junction serving as a supportive platform for an upper body, such as the arm or the knee, depending on the crutch or knee walker configuration. Further, the mobility function, such as rolling rollers, will restrict or free rotation depending on the selected configuration of the device.