This creation is a kind of knee joint structure improvement,It includes an interconnecting piece,One Fastening device and a knee hold seat and are connected,And a shaft is further provided in Fastening device,This shaft what center is that origin forms first to fourth quadrant,The shaft center has a groove,The groove can install between the what first quartile and fourth quadrant,And the connecting rod that a both ends are spherical,Its front end to be directly pivotally connected the what groove,Hou end is then pivotally connected possessed buffer unit in what interconnecting piece,To simplify pivot joint part and step,And limited between the shaft and the angle theta Jie's what third quadrant and fourth quadrant of interconnecting piece by connecting rod,Make Fastening device be able to cooperate knee to hold in seat and interconnecting piece what walking movement,Allow this create kneed flexibility ratio and walking movement between fluency be able to it is unaffected.本創作係一種膝關節結構改良，其包含一連接部、一迫緊裝置以及一膝蓋承座相連結，而迫緊裝置中更設有一轉軸，此轉軸於中心為原點形成第一至第四象限，該轉軸中央具有一凹槽，該凹槽能置設於該第一象限與第四象限之間，而一兩端呈圓球狀的連桿，其前端用以直接樞接於該凹槽，後端則樞接於連接部內所具有的緩衝裝置，用以簡化樞接零件與步驟，並藉由連桿限制該轉軸與連接部之夾角θ介於第三象限與第四象限之間，使迫緊裝置能配合膝蓋承座以及連接部於步行動作中，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。
