Patent ID: 7905536

Claim:
A clamp structure for a tonneau cover, mounted to one of at least two frame sections of the tonneau cover for releasably securing the frame sections on a cargo bed of a pick-up truck, the clamp comprising: a foundation rail connected to one of the frame sections, and having two side grooves formed on two side surfaces of the foundation rail, and a recess formed between the two side grooves; a sliding block having two side hangers extended into the two side grooves and slidably moving along the two side grooves, and a pivotal portion received in the recess; a clamp bolt having a first pivotal end pivotally connected to the pivotal portion of the sliding block, and a second pivotal section; a grip element movably mounted on the clamp bolt and having an engaging portion; and a handle pivotally connected to the second pivotal section of the clamp bolt and having a cam surface to abut against the grip element, so as to control the engaging portion of the grip element to engage with a surface of a bed wall of the pick-up truck.