Bicycle Seat Post Assembly with Fluid Biasing and Pivoting Lock
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Solution Overview
Problem
Existing adjustable bicycle seat post assemblies are often difficult to operate due to resistance created by the positioning mechanism, making it hard for cyclists to efficiently adjust the seat height during riding.
Innovation Solution
A bicycle seat post assembly featuring a telescopic design with a fluid chamber generating a biasing force and a positioning structure that includes a support member, a positioning member, a control unit, and a position maintaining member, allowing for easy adjustment without resistance by pivoting and engaging mechanisms that maintain the positional relationship between the tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a positioning mechanism is added to maintain seat position, then the seat height can be maintained, but the operation becomes difficult due to resistance
Solution Approach 1:
The positioning member is designed to dynamically change its engagement state with the position maintaining member. During adjustment, the positioning member disengages from the position maintaining member, eliminating resistance and enabling smooth telescopic movement. Once adjustment is complete, the positioning member automatically re-engages to maintain the selected position, thus resolving the contradiction between position maintenance and ease of operation.
Solution Approach 2:
The positioning mechanism operates periodically rather than continuously. The positioning member engages with the position maintaining member only at discrete moments when position maintenance is needed, while remaining disengaged during adjustment phases. This periodic engagement pattern eliminates continuous resistance during operation while still providing reliable position maintenance when required.
2Ease of operation
If excessive spring force is used to overcome positioning resistance, then the seat can be adjusted, but the operation becomes difficult and requires excessive force
Solution Approach 1:
The system performs preliminary action by automatically disengaging the positioning member from the position maintaining member before the user applies adjustment force. This preliminary disengagement removes the positioning resistance in advance, allowing the user to adjust the seat height with minimal force without needing to overcome excessive spring force.
3Adaptability or versatility
If a telescopic design with positioning mechanism is used, then seat height adjustment is enabled, but resistance is created during movement
Solution Approach 1:
The positioning mechanism transitions from a static engaged state to a dynamic state where the positioning member can freely move and disengage. During telescopic movement, the positioning member is designed to automatically disengage from the position maintaining member, eliminating resistance and enabling smooth adjustment while maintaining adaptability for position maintenance when needed.
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 enables easier operation of the seat post by minimizing resistance during telescopic movement, allowing cyclists to adjust the seat height efficiently without the need for excessive spring force, improving usability and operational ease.
Implementation Method 1
a fluid chamber including a compressible fluid to generate a biasing force to expand the first tube and second tube relative to each other
Data Source
AI summary
A bicycle seat post assembly includes first and second tubes, which are telescopically arranged, a fluid chamber, which includes a compressible fluid to generate a force to expand the first and second tubes relative to each other, and a positioning structure. The positioning structure includes a support member on one of the first tube and the second tube, a positioning member that pivots about an axis between a first position and a second position, a control unit, which is connected to the positioning member to move the positioning member between the first position and the second position, and a position maintaining member, which is provided on the other of the first tube and the second tube. The position maintaining member includes an engaging portion that engages with the positioning member to maintain a positional relationship between the first and second tubes.