Patent ID: 8403282

Claim:
A clamp device comprising: a frame including a supporting portion formed on one end thereof, wherein the supporting portion has a curved surface adapted for abutting against a handle tube, and a clamping unit pivotally connected to the frame and including a first side and a second side opposite to the first side, with each of the first and second sides forming a slant, with the tangent plane of the slant crossing a center of the curved surface of the supporting portion, with the clamping unit including two clamping elements, wherein each clamping element has a connecting portion on one end, a coupling portion on the other end opposite to the connecting portion, and a curved portion between the connecting portion and the coupling portion; wherein the clamping unit is pivotally moved between an open position and a clamping position, wherein the two clamping elements are detached from each other in the open position and the two clamping elements are close to each other in the clamping position; and wherein the slant of each of first and second side abuts with one of the two clamping elements in the open position and prevents the curved portions of the clamping element from interfering with the frame and enlarges a moving area of the two clamping elements.