Patent ID: 8251757

Claim:
A clamp comprising: a main shaft comprising: a base portion comprising a first end surface and a second end surface at opposite ends thereof, the base portion defining a first receiving hole, the first receiving hole tapering from the second end surface toward the first end surface, and a guide bar extending from an inner sidewall of the base portion in the first receiving hole away from the first end surface; a clamping sleeve arranged around the guide bar, the clamping sleeve comprising an outer sidewall tapering away from the first end surface, the outer sidewall being configured for allowing a cable to wind; an elastic element arranged around the guide bar; and a securing cap threadedly coupled to the guide bar, the securing cap configured for being rotatably operated to press the elastic element toward the clamping sleeve, such that the elastic element pushes the clamping sleeve against the base portion to clamp the cable between the outer sidewall of the clamping sleeve and the inner sidewall of the base portion.