This creation is a kind of knee joint structure-improved,It is held it includes a knee and links a Fastening device one end below seat,And reeded friction axle center is set in the Fastening device,And the what friction axle center two sides be sequentially equipped with fixed plate with convex block,And a gasket,And the fixed plate locks fixed plate connecting rod through a pair of of set screw,Another cooperation tension spring links the fixed plate connecting rod and interconnecting piece is used and provides a fixed plate restoring force for locking knee joint automatically,And link the Fastening device above interconnecting piece,And the interconnecting piece is equipped with a fixed plate locating slot and can install for the fixed plate connecting rod,Being adjusted by the fixed plate connecting rod position enables groove and convex block in being fitted and fixed with or unlocked state limits the friction axle center,And then state whether allowing user that knee can be selected to hold seat bending,And the fluency for allowing this to create between kneed flexibility ratio and walking movement is able to purpose that is unaffected and having both safety.本創作係一種膝關節改良結構，其包含一膝蓋承座下方連結一迫緊裝置一端，而該迫緊裝置中設有凹槽的磨擦軸心，且於該磨擦軸心兩側依序設有具有凸塊的固定板、以及一墊片，而該固定板透過一對定位螺絲將固定板連接桿鎖固，另配合拉簧連結該固定板連接桿與連接部藉以提供一使膝關節自動鎖定的固定板回復力，而連接部上方連結該迫緊裝置，且該連接部設有一固定板定位槽能供該固定板連接桿置設，藉由調整該固定板連接桿位置使凹槽與凸塊能呈嵌合固定或解鎖狀態來限制該磨擦軸心，進而讓使用者能選擇膝蓋承座彎曲與否的狀態，而讓本創作膝關節的靈活度以及步行動作間的流暢度得以不受影響並兼具安全性之目的。
