Training Bicycle Frame With Detachable Seat Stay for Chain Access
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Solution Overview
Problem
Existing training bicycles, particularly those for children, face difficulty in attaching and detaching the pedal unit and chain due to the presence of seat stays, which complicates chain installation requiring rear wheel removal.
Innovation Solution
A bicycle frame configuration that allows the seat stay on the side of the chain wheel to be freely attached and detached, enabling easy attachment and detachment of the chain and pedal unit, even with seat stays, through a design that includes a receiving member for the pedal unit, a chain stay with an inclined branch, and a chain cover with a through-hole for the chain stay, facilitating attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If seat stays are equipped on the bicycle frame, then the structural strength and stability are improved, but the ease of attaching and detaching the pedal unit and chain deteriorates
Solution Approach 1:
The bicycle frame is divided into fixed portions (main frame, chain stays, opposite seat stay) and a detachable portion (one seat stay on the chain wheel side). This segmentation allows the pedal unit to be accessed by removing only one seat stay, resolving the contradiction between maintaining overall structural strength and enabling easy pedal unit attachment/detachment.
2Stability of the object's composition
If seat stays are equipped on the bicycle frame, then the frame stability is improved, but the device complexity for chain installation increases
Solution Approach 1:
One seat stay is extracted as a detachable component from the otherwise fixed frame structure. This allows the chain and pedal unit to be installed or removed without requiring rear wheel removal, significantly simplifying the installation process while maintaining frame stability through the remaining fixed components.
3Ease of operation
If the bicycle is designed without seat stays, then the ease of pedal unit attachment is improved, but the structural strength and stability deteriorate
Solution Approach 1:
Instead of removing all seat stays, only one seat stay is segmented as detachable while the other remains fixed. This provides a compromise solution that maintains sufficient structural strength through the fixed components while enabling easy pedal unit attachment by removing just one seat stay.
Data Source
AI summary
A pedal unit attachable/detachable training bicycle that easily attach/detach a chain and a pedal unit to/from a training bicycle that has a seat stay. The pedal unit attachable/detachable training bicycle includes a bicycle frame having a receiving member provided at bottom of a seat tube to connect a pedal unit. The pedal unit, which is configured to detachably attach to the receiving member. A chain threaded between the pedal unit and a rear wheel. The bicycle frame is configured to enable a seat stay on side of the chain wheel to be freely attached to and detached from the bicycle frame.