Lever-Locked Collapsible Rollator Joints for Secure Folding
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Solution Overview
Problem
Existing foldable rollators lack a reliable and easy-to-operate locking mechanism that prevents rolling when engaged.
Innovation Solution
A collapsible rollator walker with a hand-operated locking mechanism using a lever-activated locking mechanism that secures the rollator in place, allowing it to be easily converted between open and closed positions using sliding joint members and crossbar members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is added to prevent rolling, then reliability is improved, but device complexity increases
Solution Approach 1:
The locking mechanism is integrated into the sliding joint member itself, combining the locking function with the existing structural component. The cam member is formed as part of the sliding joint member assembly, merging what could have been separate locking components into a unified structure that prevents rolling while maintaining simplicity.
Solution Approach 2:
The cam member is spring-biased to automatically engage with the locking surface when the sliding joint member is positioned in the locked position. This self-actuating mechanism uses the spring force to maintain locking without requiring additional actuators or complex control systems, improving reliability while keeping the device simple.
2Ease of operation
If a hand-operated locking mechanism is implemented, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The spring-biased cam member automatically engages with the locking surface when the sliding joint member is positioned in the locked position, eliminating the need for separate locking actions. The user simply needs to position the sliding joint member, and the spring mechanism handles the locking engagement automatically, improving ease of operation without adding complexity.
Solution Approach 2:
The locking function is extracted as a separate cam member that can be independently designed and positioned within the sliding joint member assembly. This modular approach allows the locking mechanism to be implemented with simple, discrete components rather than integrating complexity into the main structure.
3Adaptability or versatility
If the rollator is made collapsible for storage, then adaptability is improved, but reliability of locking decreases
Solution Approach 1:
The support members are designed to be pivotally connected, allowing dynamic transformation between extended (operational) and collapsed (storage) configurations. The locking mechanism using spring-biased cam members maintains reliability in both states by providing positive locking engagement that prevents unintended movement during operation and secures the collapsed structure during storage.
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 secure and user-friendly locking mechanism that enables easy conversion between operational and storage positions, enhancing usability for individuals with limited mobility and strength.
Implementation Method 1
a spring member (216) positioned within said first spring (212) and fixedly attached to a predetermined edge of said cam (211)
Implementation Method 2
a lever-activated locking mechanism that secures the rollator in place
Data Source
AI summary
Disclosed is a foldable locking rollator constructed and arranged to be pivotably operable between an open position and a closed storage position. The folding locking rollator assembly is comprised of a support structure having two spaced apart front support members and two rear support members. Each rear support member is pivotally attached to the ends of the front support members with hinge assemblies. The front support members each have a sliding joint member constructed and arranged to slide between the front support members ends. A set of crossbar members are pivotally connected at a predetermined point in an X-configuration. At least one sliding joint member is comprised of a locking mechanism constructed and arranged to be hand operated with a lever by the user.