Bicycle Fender Quick-Release via Linear Pressing Control
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Solution Overview
Problem
Conventional bicycle fender quick-release fixing structures are complex, prone to misalignment, and can be damaged due to rotational operation, making them difficult to assemble and disassemble, and costly to maintain.
Innovation Solution
A simply structured quick-release fixing structure comprising a mounting member with penetrating holes and cutting grooves, an engaging member with arc-shaped cutting grooves, and a U-shaped control member that engages in a transverse direction, allowing for easy assembly and disassembly via pressing operations, enhancing structural strength and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control member is rotated to engage with the fender, then the fender can be fixed to the front fork, but misalignment occurs and the structure becomes complex
Solution Approach 1:
Instead of rotating the control member to achieve engagement, the patent inverts the approach by using a pressing operation that moves the control member linearly. The control member is pressed in the longitudinal direction to simultaneously engage with multiple engaging blocks, eliminating the need for rotation and preventing misalignment between the fender and wheel.
Solution Approach 2:
The patent divides the engagement function into multiple independent engaging blocks distributed around the control member. Each engaging block can independently engage with corresponding structures on the fender, allowing the system to achieve stable fixation without requiring precise rotational alignment, thus simplifying the overall structure.
2Ease of operation
If the handle portion is pulled to rotate the control member, then the fender can be installed or disassembled, but the engaging structures are likely to be damaged
Solution Approach 1:
The patent inverts the operational mechanism from pulling/rotating to pressing/moving linearly. The control member is designed to be pressed in the longitudinal direction rather than pulled for rotation. This pressing operation distributes force evenly across multiple engaging blocks, preventing concentration of stress that would lead to damage, while maintaining ease of operation.
Solution Approach 2:
The control member incorporates elastic pieces that provide dynamic response to the pressing operation. The elastic pieces allow the control member to flex and adapt to engagement forces, distributing the mechanical stress and preventing damage to the engaging structures while maintaining operational simplicity.
3Reliability
If the control member is rotated for operation, then the fender can be fixed, but disc member and connecting member are needed to prevent wear, increasing cost
Solution Approach 1:
The patent extracts and eliminates the disc member and connecting member from the conventional structure. By inverting the operation from rotation to linear pressing, the control member directly engages with the engaging blocks without requiring intermediate protective components, reducing the total number of parts while maintaining wear resistance through the elastic pieces.
Solution Approach 2:
The control member is designed to perform multiple functions: it provides the pressing operation for engagement, incorporates elastic pieces for wear protection, and directly interfaces with engaging blocks. This multi-functionality eliminates the need for separate disc members and connecting members, simplifying the structure while maintaining reliability.
Data Source
AI summary
A quick-release fixing structure for a fender of a bicycle is provided with a mounting member fixed to the front fork, an engaging member fixed on the fender, and a U-shaped control member. The mounting member is formed with an elastic piece, a receiving cavity, and two penetrating holes which have two cutting grooves in communication with the receiving cavity and the penetrating holes. The engaging member is received in the receiving cavity of the mounting member and formed with two arc-shaped cutting grooves for mating with the arc-shaped cutting grooves of the mounting member. The control member is inserted in the penetrating holes and formed with two arc-shaped grooves. The quick-release fixing structure is capable of assembling the fender onto the front fork of bicycle or disassembling it therefrom by a simple pressing operation.