Rotatable Bicycle Seat Assembly for Upright Riding Stability
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Solution Overview
Problem
Bicycles with small wheels face handling issues, including instability and increased effort while riding standing due to lack of seat support, as existing designs either hinder standing or fail to provide adequate support for upright cycling.
Innovation Solution
A bicycle seat assembly rotatably connected to the bicycle frame, allowing lateral movement independent of steering, providing support and reducing strain by allowing the seat to move with the rider's leg position, thus enabling comfortable upright cycling and improved stability with small wheels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bicycle seat is firmly connected to the bicycle frame, then the cyclist has stable support, but the cyclist cannot ride while standing
Solution Approach 1:
The bicycle seat is made dynamically movable relative to the bicycle frame through a rotatable connection mechanism. The seat can rotate about a vertical axis and tilt forward/backward, allowing it to adapt between seated and standing riding positions. This dynamic capability enables the seat to move out of the way when standing and provide support when seated, resolving the contradiction between standing ability and seated support stability.
2Volume of moving object
If the bicycle uses small wheels (smaller than 16 or 20 inches), then the bicycle achieves compact size and maneuverability, but the front wheel becomes unstable and jiggles at lower speeds
Solution Approach 1:
The movable bicycle seat acts as a counterweight mechanism to stabilize the small front wheel. When the front wheel tends to jiggle, the cyclist can shift the seat position or tilt to create a counterbalancing moment that opposes the destabilizing forces. The seat's mobility allows it to function as an active counterweight, compensating for the reduced gyroscopic effect of small wheels and improving directional stability during fast cycling and obstacle traversal.
3Ease of operation
If the bicycle seat is pivotally connected to the seat tube, then the cyclist can adjust seating position, but riding while standing is still hindered by the saddle
Solution Approach 1:
The bicycle seat assembly is designed with multi-functionality to serve both seated and standing riding modes. The rotatable connection mechanism allows the seat to perform multiple functions: providing support when seated, moving aside when standing, and even assisting in steering when needed. This universal design eliminates the need to choose between standing capability and seating adjustment, as the seat adapts to fulfill different riding requirements.
4Ease of operation
If the bicycle seat is used as the steering device, then the bicycle can be steered, but the cyclist must generate additional tensions between the seat and waist/hips, making riding exhausting
Solution Approach 1:
The steering function is segmented and separated from the seat's primary support function. The rotatable connection mechanism allows the seat to rotate independently for steering purposes without requiring the cyclist to exert excessive force. The seat can be lightly tilted or rotated to initiate steering movements, and the small front wheel's quick response amplifies these subtle inputs, reducing the energy required compared to using the seat as the sole steering mechanism.
Data Source
AI summary
The invention relates to a bicycle, with a bicycle seat assembly rotatably connected to the bicycle. Rotation movement of the bicycle seat assembly is possible, seen in the driving direction, to the left and to the right side and is independent of the steering movement of the bicycle. The axis of rotation of the bicycle seat assembly is arranged in front of the axis of the bottom bracket, seen in the driving direction, and the seating surface of the bicycle seat is arranged behind the axis of the bottom bracket, seen in the driving direction. The rotatable bicycle seat assembly enables an upright riding position by dodging the cyclist's leg pedaling downwards through a rotational movement. At the same time it supports the hip side of the other leg. The driver is supported by the bicycle seat even in the upright riding position.