This creation is a kind of chain compacting structure of wheelchair of related what,Mean a kind of idle pulley structure on what wheelchair,The wheelchair include a carrier base,One transmission shaft group,One gear set,One chain and an idle pulley group,Wherein transmission shaft group is pivoted on what carrier base,And the gear system is arranged in what transmission shaft group,And chain is set on what gear set and cooperates actuation with it,The carrier base is equipped with the idle pulley group of adjustment chain elasticity again,The another transmission shaft group is respectively equipped with a pedal group and a wheel tool group,By above-mentioned structure,When what uses wheelchair,Trample action is carried out to pedal group,Wheelchair is set to move,As be used for a long time or other users in use,Chain elasticity is set to make moderate change through idle pulley group,Thereby reach and quickly adjusts and be not easy the practical improvement loosened.本創作為有關於一種輪椅之鍊條迫緊結構，係指一種用於輪椅上之惰輪結構，該輪椅包含有一支架座、一傳動軸組、一齒輪組、一鍊條及一惰輪組，其中傳動軸組樞設於支架座上，且該齒輪組係套設於傳動軸組上，而鍊條設於齒輪組上且與其配合作動，又該支架座上設有調整鍊條鬆緊度之惰輪組，另該傳動軸組分別設有一踏板組及一輪具組，藉由上述之結構，於使用輪椅時，對踏板組進行踩踏動作，使輪椅得以移動，如長期使用或其他使用者使用時，透過惰輪組使鍊條鬆緊度作適度變化，藉此達成快速調整且不易鬆脫之實用進步性。
