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Spring / bicycle parts

Spring

This is a Waterproof System of Bicycle Seat.
When no one sitting, the seat will be bounced by the spring device of this system. So, rain will flow down the seat whose surface is made by water repellent material.When there is stress of rider,seat will turn back into their normal forms. So,rider can ride as usual.

University

Beijing Institute of Technology

Beijing Institute of Technology
Beijing, China

Ge Zhang,
Beijing Institute of Technology

Fenglin Xie,
Beijing Institute of Technology

Peng Li,
Beijing Institute of Technology

Ruquan Li,
Beijing Institute of Technology