kafo orthotosis

Modified Ring Lock Knee Joint (Orthotic Perspective) The modified ring lock knee joint is a mechanically refined stance-control component used in knee–ankle–foot orthoses to provide secure knee stabilization during weight bearing while allowing intentional, user-controlled knee flexion during sitting or gait transitions. Unlike conventional drop locks, the ring lock employs a circular locking ring integrated into the joint axis. In the modified design, the ring geometry, engagement angle, and release path are optimized to reduce accidental disengagement and improve tactile feedback for the user. Locking occurs automatically when the knee reaches terminal extension, converting the joint into a rigid column that enhances stance-phase safety. The modification typically focuses on: Improved ergonomics: Easier reach and smoother release motion for users with limited hand strength or dexterity Controlled engagement: Reduced play and noise through refined tolerances Durability: Reinforced contact surfaces to withstand repetitive load cycles