| 摘要 |
A joint assembly adjusts the height of a bicycle saddle and includes an elongated seat tube member, a joint member made of a carbon-fiber composite material, a seat post, and a hoop member. The joint member has an upper connecting portion, a lower connecting portion, and a longitudinal receiving chamber formed through the joint member from the upper connecting portion to the lower connecting portion. The upper connecting portion has a plurality of open-ended slots formed therethrough. Each adjacent pair of the open-ended slots define a flexible plate therebetween. The seat tube member is inserted fittingly into the receiving chamber and has a plurality of open-ended slots aligned with the open-ended slots of the joint member, and a shoulder portion which abuts against the bottom surface of the lower connecting portion of the joint member. The seat post extends downward from the bicycle saddle to engage movably the seat tube member. The hoop member is sleeved on the upper connecting portion of the joint member so as to lock the seat post on the joint member.
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