Bicycle Seatpost Assembly with Electric Actuator Control
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Solution Overview
Problem
Current bicycle seatpost assemblies lack the ability to dynamically adjust length based on user preferences and riding conditions, limiting comfort and performance.
Innovation Solution
A bicycle seatpost system incorporating an electric actuator and remote controller that allows for adjustable length changes via control signals generated based on user input duration, direction, and mode, enabling customizable adjustment periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-length seatpost is used, then the structure is simple and reliable, but the adaptability to different riding conditions and user preferences is poor
Solution Approach 1:
The seatpost transitions from a fixed-length static structure to a dynamic adjustable structure. The inner tube can move relative to the outer tube, allowing the seatpost length to be adjusted based on riding conditions and user preferences, directly resolving the contradiction between simplicity and adaptability.
Solution Approach 2:
The seatpost is divided into multiple segments: an outer tube, an inner tube, and a locking mechanism. This segmentation allows the seatpost to maintain a simple fixed structure when locked while enabling adjustment when needed, balancing structural simplicity with adaptability.
2Ease of operation
If manual adjustment mechanisms are used, then the device complexity is reduced, but the ease of operation and precision of adjustment are limited
Solution Approach 1:
The manual mechanical adjustment mechanism is replaced with an electric actuator system. The actuator receives electrical signals to adjust the seatpost length automatically, providing easier operation and more precise control without requiring complex manual cranks or levers.
Solution Approach 2:
A control unit acts as an intermediary between the user input and the actuator. The control unit processes adjustment requests and sends appropriate signals to the actuator, simplifying the user interface while maintaining precise control over the adjustment mechanism.
3Adaptability or versatility
If the seatpost length is made variable, then the adaptability improves, but the reliability and stability during riding may be compromised
Solution Approach 1:
The seatpost employs a dynamic locking mechanism that transitions between locked and unlocked states. When locked, the inner tube is firmly secured relative to the outer tube, ensuring stability and reliability during riding. When unlocked, adjustment is enabled, thus resolving the contradiction between stability and adjustability.
4Ease of operation
If multiple control modes are added to the remote controller, then the ease of operation and adaptability improve, but the device complexity increases
Solution Approach 1:
The remote controller is designed with multi-functionality, incorporating multiple operating parts that can perform different control functions. Each operating part can be configured for different adjustment modes, allowing a single device to handle various control scenarios without requiring multiple separate controllers, thus balancing flexibility with complexity.
Data Source
AI summary
A bicycle seatpost system comprises an electric actuator, a remote controller, and a seatpost controller. The seatpost controller is configured to control the electric actuator to change a state of the bicycle seatpost assembly to an adjustable state based on one of a first control signal and a second control signal. The remote controller includes a first operating part configured to receive a first user input and a second operating part configured to receive a second user input. The remote controller is configured to generate the first control signal having a constant signal length regardless of an operation period of the first user input. The remote controller is configured to generate the second control signal having a signal length corresponding to the operation period of the second user input.