Adjustable Bicycle Seat Post With Ball Lock Height Positions
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Solution Overview
Problem
Current bicycle seat post adjustments require the rider to be off the bike and involve significant time and manipulation, making it inconvenient for accommodating different rider sizes and styles.
Innovation Solution
A seat post assembly with an outer and inner tube, where the inner tube is telescopically movable, and a locking mechanism using ball members and a sleeve actuated by a lever, allowing for quick and easy height adjustments without the need to dismount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional rigid seat post is used, then the structure is simple and reliable, but the adjustment requires significant time and manipulation and the rider must be off the bicycle
Solution Approach 1:
The seat post transitions from a static rigid structure to a dynamic adjustable structure with telescopic inner and outer tubes that can be quickly extended or retracted. The actuator mechanism enables the seat post to dynamically change its length while the rider is on the bicycle, resolving the contradiction between operational ease and time loss.
Solution Approach 2:
The actuator mechanism is designed to be operable by the rider during normal cycling without requiring dismounting or complex manipulation. The rider can independently adjust the seat post height on-the-fly, making the system self-servicing and eliminating the time penalty associated with traditional adjustment methods.
2Productivity
If a telescopic mechanism with multiple ball members is used, then rapid adjustment is enabled, but the device complexity increases
Solution Approach 1:
The locking mechanism is segmented into multiple independent ball members (first plurality and second plurality) that can engage with corresponding recesses at different positions. This segmentation allows the mechanism to lock at multiple discrete height positions while maintaining a relatively simple overall structure, enabling rapid adjustment without excessive complexity.
Solution Approach 2:
The actuator serves as an intermediary element that coordinates the movement of multiple ball members simultaneously. By using this single actuator to control all locking balls, the system achieves rapid adjustment without requiring complex individual control mechanisms for each ball, thus balancing productivity gains with acceptable device complexity.
Data Source
Figure 1A~1C
Figure 2A~2E
Figure 3A~3C
AI summary
A method and apparatus for a seat post assembly that is adjustable to an upper, intermediate, and lower seat post position using a locking member and a sleeve member coupled to an actuator for securing and releasing an inner tube with respect to an outer tube. The actuator may move the sleeve member to release the locking member from engagement with the outer tube to adjust the inner tube and thus the seat post assembly to the upper, intermediate, or lower seat post positions. The actuator and the sleeve may be biased into an initial position that urges the locking member into engagement with outer tube to lock the inner tube to the outer tube.