Foldable Frame With Z-Shape Linkage for Compact Folding
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Solution Overview
Problem
Conventional foldable frames for commuting tools have insufficient volume shrinkage rates and complex folding/unfolding procedures, which can lead to inefficiency and potential damage or injury.
Innovation Solution
A foldable structure incorporating a supporting pipe, first and second driving rods, and a movable assembly that allows the frame to be converted between unfolded and folded configurations by pivoting the driving rods and movable pipe, forming a Z-shape when folded, thereby simplifying the folding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional foldable structure is used, then the frame can be folded and carried, but the volume shrinkage rate is insufficient
Solution Approach 1:
The patent employs dynamic linkage mechanisms where the driving rods and connecting members can pivot and rotate relative to each other. This allows the frame to transition smoothly between unfolded and folded states, achieving compact volume reduction while maintaining operational simplicity through natural mechanical motion
Solution Approach 2:
The foldable structure is designed with nested components where the front wheel frame, handlebar frame, and driving rods are arranged to fold into each other. When folded, these components form a compact Z-shaped configuration that maximizes volume shrinkage while keeping the folding procedure straightforward
2Ease of operation
If a conventional foldable structure is used, then the frame can be folded, but the folding procedure is complicated
Solution Approach 1:
The frame structure is pre-configured with pivot points, connecting members, and driving rods positioned such that folding and unfolding require minimal user intervention. The components are arranged in advance to enable automatic alignment and engagement during the folding process, reducing both time and complexity
Solution Approach 2:
Multiple folding functions are combined into a single integrated mechanism. The driving rods simultaneously control the folding of both front wheel frame and handlebar frame, allowing the entire folding operation to be completed through one simple action rather than multiple separate steps
3Reliability
If a conventional foldable structure is used, then the frame can be folded, but incorrect procedure could cause breaking or injuries
Solution Approach 1:
The patent incorporates safety features built into the mechanical structure itself, such as controlled pivot points and guided motion paths for the driving rods and connecting members. These design elements prevent incorrect folding sequences or excessive forces from causing damage or injury, providing inherent protection without adding complex control systems
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 design enhances the volume shrinkage rate of the folded frame and simplifies the folding/unfolding procedure, reducing time and risk of damage.
Implementation Method 1
when the movable pipe moves from the first position to the second position on the supporting pipe along the reference axis, the movable pipe pulls the at least one first driving rod to pivot around the first pivot point in a first rotation direction through the first connecting member and pulls the at least one second driving rod to pivot around the second pivot point in a second rotation direction through the second connecting member
Data Source
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AI summary
A frame with a foldable structure (100, 200, 300) includes a front wheel frame (20), a handlebar frame (30), and a foldable structure (10) including a supporting pipe (11) defined with a reference axis (L1), a movable assembly (12), a first driving rod (13), and a second driving rod (14). The front wheel frame (20) is for installing a front wheel (21) and is pivotally connected to the handlebar frame (30). The movable assembly (12) includes a first connecting member (122), a second connecting member (123), and a movable pipe (121) fitting around the supporting pipe (11) and being movable between a first position (P1) and a second position (P2) along the reference axis (L1). An end of the first driving rod (13) is pivotally connected to the supporting pipe (11). Another end of the first driving rod (13) is pivotally connected to the front wheel frame (20). An end of the second driving rod (14) is pivotally connected to the supporting pipe (11). Another end of the second driving rod (14) is installed with a rear wheel (40).