Self-locking Connecting Rod for Double-folded Rollator
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Solution Overview
Problem
Folding and unfolding of double-folded rollators is cumbersome and requires multiple operation steps, resulting in an unstable structure that needs manual locking, making it difficult to achieve quick folding and unfolding.
Innovation Solution
A connecting rod self-locking structure comprising a cross pipe, main frame bottom pipes, a folding plastic seat, connecting rods, a torsion spring, and a drawstring mechanism that allows for automatic self-locking and easy folding of the vehicle by utilizing a connecting rod hook and limiting column, ensuring stability and convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If manual locking mechanism is used, then the structure stability is improved, but the operation complexity increases
Solution Approach 1:
The connecting rod hook automatically locks itself onto the limiting column through elastic deformation when the main frame bottom pipe is pulled outward, eliminating the need for manual locking operations. The system serves itself by using the pulling force to trigger the locking mechanism inherently.
Solution Approach 2:
The connecting rod hook is pre-positioned and pre-loaded with elastic energy from the torsion spring before the unfolding action begins. When the main frame bottom pipe is pulled, the locking action occurs automatically at the right moment without requiring additional manual steps.
2Reliability
If multiple operation steps are required, then the locking reliability is improved, but the folding and unfolding speed decreases
Solution Approach 1:
The locking mechanism performs the locking function automatically through the elastic deformation of the connecting rod hook, which engages with the limiting column without requiring multiple manual operations. This single-action self-locking process maintains reliability while dramatically increasing speed.
Solution Approach 2:
The locking function is separated from the unfolding action, allowing the main frame bottom pipe to be pulled outward while the connecting rod hook independently performs the locking operation through elastic deformation, achieving both speed and reliability.
3Ease of operation
If automatic self-locking mechanism is implemented, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The connecting rod hook uses its own elastic deformation, driven by the torsion spring, to achieve automatic locking. The system leverages the existing structural components and forces already present in the mechanism, adding minimal complexity while maximizing ease of operation.
Solution Approach 2:
The connecting rod hook changes its shape parameter through elastic deformation when pulled outward, transforming from a relaxed state to a locked state by engaging with the limiting column. This parameter change is driven by the existing torsion spring force.
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 structure enables quick and stable folding and unfolding of the rollator, with automatic self-locking preventing collapse and facilitating easy handling by reducing the number of operation steps required.
Implementation Method 1
the connecting rod hook is connected to the connecting rod via a torsion spring
Data Source
AI summary
The present invention discloses a connecting rod self-locking structure for a double-folded rollator, comprising a cross pipe and two sets of main frame bottom pipes arranged in parallel to the left and right. A folding plastic seat is movably mounted on the top of the front end of the main frame bottom pipe via a pin shaft, two sides of the bottom of the folding plastic seat are clamped on the side edge of the main frame bottom pipe, the bottom of the cross pipe is movably connected to the folding plastic seat, a connecting rod hook is connected to a connecting rod via a torsion spring, and a limiting column for the connecting rod hook to be buckled is further provided on the upper part of the cross pipe.