Patent ID: 8495801

Claim:
A clamping device comprising: a holding member including a space in which an item is adapted to be disposed therein, wherein the holding member includes a first arm and a second arm, wherein the holding member has a cross section including an open end, wherein the holding member has an outer peripheral wall in which first and second concaved cavities are recessed, and wherein the first concaved cavity is disposed in the first arm and the second concaved cavity is disposed in the second arm, respectively; and a tightening mechanism engaged with the holding member and operable to make the holding member clamp the item therein, wherein the holding member includes an inner peripheral wall, which delimits the space, embracing and abutting against an outer peripheral edge of the item; wherein the tightening mechanism includes a male coupling member and a female coupling member engaged with the male coupling member, with the male coupling member including a shaft having a head end and a tail end formed opposite to the head end, with the shaft inserted through the first concaved cavity of the first arm and the second concaved cavity of the second arm, with the head end engaged in the first concaved cavity and having an arcuate surface contacting with the arcuate surface of the first concaved cavity, with the female coupling member including a body including an engaging end engaged in the second concaved cavity, with the engaging end having an arcuate surface contacting with the arcuate surface of the second concaved cavity, with the first and second concaved cavities each having arcuate cross sections parallel to and circumferentially around the shaft defining an arcuate edge, wherein the first concaved cavity extends partially through the first arm, wherein the first arm includes a first slot extending perpendicular to the shaft from the first concaved cavity to the open end of the holding member; wherein the arcuate surface of the first concaved cavity and the arcuate surface of the head end of the male coupling member aligning the male coupling member in the first concaved cavity, and wherein the arcuate surface of the second concaved cavity and the arcuate surface of the engaging end of the female coupling member aligning the female coupling member in the second concaved cavity, wherein the shaft of the tightening member engaged with the female coupling member is insertable into and removable from the first concaved cavity through the first slot of the first arm and without having to disengage the female coupling member from the male coupling member; and wherein the space has a size that is varied by adjusting the tightening mechanism.