Folding Bicycle Frame with Simultaneous Lock Release
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Solution Overview
Problem
Existing folding bicycles require the removal of multiple lock buckles for folding and unfolding, making the process complex and time-consuming.
Innovation Solution
A main frame design for folding bicycles that includes connecting and upper pipe fittings with hinge lock buckles, where a handle drives the simultaneous unlocking of both hinge lock buckles, allowing for simple and quick folding by rotating the connecting and lower pipe fittings relative to the upper pipe fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple lock buckles are used to secure the frame sections, then the reliability of the locked state is improved, but the device complexity and ease of operation deteriorate due to requiring multiple separate unlocking actions
Solution Approach 1:
The patent combines multiple lock buckles (first lock buckle and second lock buckle) into a single integrated locking mechanism. When the first pipe fitting is rotated relative to the main frame, both lock buckles are simultaneously engaged or disengaged through a shared transmission mechanism, allowing one operational action to control multiple locking points and thereby improving ease of operation while maintaining reliable locking of both frame sections.
Solution Approach 2:
The first pipe fitting serves multiple functions: it acts as both the first lock buckle (locking with the main frame via first limit block and first groove) and the second lock buckle (locking with the second pipe fitting via second limit block and second groove). This multi-functionality reduces the number of separate components needed and simplifies the unlocking operation to a single rotational action.
2Reliability
If multiple lock buckles are used to secure the frame sections, then the reliability of the locked state is improved, but the device complexity increases due to multiple separate locking mechanisms
Solution Approach 1:
The patent merges the first lock buckle and second lock buckle into a single integrated first pipe fitting assembly. The transmission mechanism within the first pipe fitting connects both locking functions, so that one rotational movement simultaneously operates both lock buckles. This reduces device complexity by eliminating the need for separate control mechanisms for each lock buckle while maintaining reliable dual-point locking.
Solution Approach 2:
The first pipe fitting is designed as a universal component that performs both locking functions: it locks with the main frame through the first limit block and first groove, and simultaneously locks with the second pipe fitting through the second limit block and second groove. This multi-functional design reduces the overall number of components and simplifies the locking mechanism structure.
3Ease of operation
If a single handle controls both lock buckles, then the ease of operation is improved by enabling simultaneous unlocking, but the device complexity increases due to the transmission mechanism required
Solution Approach 1:
The patent combines the control of both lock buckles into a single handle mechanism. The handle is transmission-connected to the first pipe fitting, and when rotated, it simultaneously drives both the first limit block and second limit block to engage or disengage from their respective grooves. This merging of control functions into one handle improves ease of operation while the transmission mechanism remains integrated within the existing frame structure.
Solution Approach 2:
The handle serves as a universal control element that operates both locking mechanisms through the first pipe fitting. A single rotational action of the handle transmits force through the connection to simultaneously control both the first lock buckle and second lock buckle, providing multi-functional control with a single component and minimizing additional transmission complexity.
Data Source
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AI summary
The present invention relates to the field of bicycles, and discloses a main frame for folding a bicycle and a folding bicycle, including the connecting pipe fitting, upper pipe fitting, lower pipe fitting, first and second hinge lock buckles and handles. The upper pipe fitting is installed on the connecting pipe, and the connecting pipe can be unfolded or folded relative to the upper pipe fitting. The lower pipe fitting is installed on the upper pipe fitting, and the lower pipe fitting can be unfolded or folded relative to the upper pipe fitting. The first hinge lock buckle is installed on the upper pipe fitting, and is used for lock the connecting pipe fitting when the connecting pipe fitting is unfolded relative to the upper pipe fitting. The second hinge lock buckle is installed on the upper pipe fitting, and is used to lock the lower pipe fitting when the lower pipe fitting is unfolded relative to the upper pipe fitting. The handle is connected with the first and second hinge lock buckles, and drives the unlocking of the first and second hinge lock buckles when the first hinge lock buckle locks the connecting pipe fitting and the second hinge lock buckle locks the lower pipe fitting, so that both the connecting pipe and the lower pipe fitting can be folded relative to the upper pipe fitting. In this way, the unlocking of the first and second hinge lock buckles can be completed at the same time through one action, and the folding operation of the folding bicycle can be completed quickly.