Development of 4-Bar Linkage Orthotic Knee Joint

4절 연쇄 보조기무릎관절의 개발

  • 김장환 (한서대학교 의료보장구학과) ;
  • 이진복 (한서대학교 의료보장구학과)
  • Received : 2011.10.17
  • Accepted : 2011.10.31
  • Published : 2011.12.28


This study aims to develop the stance-control typed 4-bar linkage orthotic knee joint that replace the locked orthotic knee joint for the disabled with poliomyelitis and muscle weakness of lower limb. Unlike the existing stance-control orthotic knee joint, there are no needs of electric power, connecting circuit, bulky compomnets, etc, because this 4-bar linkage orthotic knee joint is controled by geometric locking. To evaluate the 4-bar linkage orthotic knee joint, a subject participated in this study who has been diagnosed with lower limb poliomyelitis and have used locked type orthotic knee joint. In the results of analysis of subject's gait using 3-dimentional motion analysis system, this 4-bar linkage orthotic knee joint provide the stability during stance phase and knee flexion during swing phase.


Poliomyelitis;Muscle Weakness;Locked Type Orthotic Knee Joint;4-bar Linkage;Stance-contol Type


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