| 摘要 |
PURPOSE:To prevent the turning-down trouble due to the sharp transfer of body weight by carrying out the secure locking in the application of body weight during walking and releasing the locking surely when the body weight is removed. CONSTITUTION:Since, when a leg kicks forwardly, the perfect extension of the engagement parts 4 and 5 of the upper and lower leg members 1 and 2 is suppressed because of the elasticity of a rubber sleeve 12, and a pendulum lock member 7 can not intrude into a lock receiving member 8, and a locked state is not generated. On the contrary, when body weight is applied in the state where the leg kicks forwardly, the upper and lower leg members 1 and 2 perfectly extend against the elasticity of the rubber sleeve 11. When the kick angle of the leg exceeds a certain angle, the center of gravity of the pendulum lock member 7 exceeds an instable neutral point, and the supporting part 12 of the lock receiving member 8 doen sot suppress the leftward swing of the pendulum lock member 7, and the lock state is realized. In this lock state, even if the body weight sharply transfers or walking is suppressed, the body weight can be surely supported. |
