Patent ID: 7954824

Claim:
A coupling device comprising, in combination: a body including a first end adapted to be coupled with a handle and a second end adapted for removably receiving an object, with the body including a compartment having a receiving space adapted for receiving the object, with the receiving space including an inner periphery having a slanted face that extends longitudinally outward and radially inward from an inner end of the receiving space, with the body further including a guide slot in a peripheral wall thereof, with the guide slot extending in a longitudinal direction parallel to a longitudinal axis of the body and in a radial direction to be in communication with the compartment; a follower mounted in the compartment and slidable in the longitudinal direction, with the follower including an inner end and an outer end, with the outer end of the follower including a radially outer side and a radially inner side distant to the slanted face, with the outer end of the follower further including a restraining hole extending from the radially outer side through the radially inner side, with the inner end of the follower including a transverse hole extending in a direction transverse to the longitudinal direction; a positioning member extending from the radially outer side through the restraining hole to the radially inner side, with the positioning member being slidable along the slanted face and having a maximum outer diameter larger than a minimum diameter of the restraining hole; a first elastic element mounted in the compartment and abutting against the follower; a release member mounted to the body; and a pin extending through the release member, the guide slot of the body, and the transverse hole of the follower such that movement of the release member in the longitudinal direction away from the receiving space causes longitudinal movement of the follower and the positioning member away from the receiving space to release the radial clamping force, allowing removal of the object from the receiving space; wherein the follower is biased outward by the first elastic element toward the receiving space when the object is inserted into the receiving space and moves the follower longitudinally inward, with the positioning member securely clamping the object in the receiving space between the follower, with a radial clamping force being imparted from the slanted face through the positioning member to the object.