| 摘要 |
An apparatus for adjusting tension according to the present invention comprises: (1) a guide member; (2) a spring member which is arranged along the longitudinal direction of the guide member; (3) a first pulley which is arranged to be movable along the guide member; (4) a plate which is arranged to be movable along the guide member; (5) a screw rod member which is extended in the opposite direction of the first pulley from the plate; and (6) a motor which controls the displacement of the screw rod member. One end portion and the other end portion of the spring member are arranged to be in contact with the first pulley and the plate, respectively. |
