Hinge assembly including power-transmission member and knee brace including the hinge assembly

In one embodiment of the invention, hinge assembly is hinge plate has at least one upper fastening holes and at least one lower fastening holes; It is connected so as to be rotatable to any one of the upper coupling hole, an upper rotating member connected to the upper arm; Are connected so as to be rotatable in any one of the lower coupling hole, the lower rotating member is connected to the lower arm; And including getting the wound side to the outer peripheral surface of the upper rotary member becomes the other side is wound on the outer peripheral surface of the lower rotary member, the power transmission member (power-transmission member) for transmitting power between the upper rotating member and the lower rotary member do. Upper arm, lower arm, upper member, the lower member, a power transmitting member, the knee brace