This creation is a kind of resetting structure improvement of knee joint,Comprising a knee joint and a resetting apparatus,The knee joint by a knee hold seat,One interconnecting piece,One connecting rod and a linkage cooperate to be pivotally connected and constitute,And the interconnecting piece has defined a perforation and a wears groove,And one pneumatic cylinder connection the what interconnecting piece on the inside of,And pull rod pivot joint what knee is held on the inside of seat above pneumatic cylinder,And below pneumatic cylinder in one playback seat what perforation of connection,One resetting apparatus include a ball set the what wears groove one end and with playback seat phase contact,Its resetting apparatus can correspond to kneed pivotal orientation,Ball is set to be rotated contact by playback seat,Resetting apparatus is allowed to be in compressive state,When knee joint reversely pivots,Ball can be made to be released the compressive state of the resetting apparatus,The elasticity that abundance can effectively be provided can improve the speed of knee joint reply,And knee joint free of demolition can be accustomed to being adjusted according to user.本創作係一種膝關節之復位結構改良，包含一膝關節以及一復位裝置，該膝關節係由一膝蓋承座、一連接部、一連桿和一連動裝置相互配合樞接構成，而該連接部界定有一穿孔及一穿槽，以及一氣壓缸連結於該連接部內側，且氣壓缸上方拉桿樞接於膝蓋承座內側，而氣壓缸下方連結一歸位座於該穿孔內，一復位裝置包含有一圓珠設於該穿槽一端且與歸位座相頂抵，其復位裝置能對應膝關節的樞轉方向，使圓珠受歸位座轉動頂抵，讓復位裝置呈壓縮狀態，當膝關節反向樞轉時，能使圓珠得以釋放該復位裝置的壓縮狀態，能有效提供充足之彈性能夠改善膝關節回復之速度，且免拆卸膝關節即能依使用者習慣進行調整。
