Patent ID: 7516926

Claim:
A suction disc unit for attaching a connecting member to a smooth surface, the unit comprising: a) a pressing lid having an inner side and an outer side, the inner side defining a receiving space and the outer side including a connecting seat protruding from a surface of the pressing lid for supporting the connecting member; b) a suction disc in the receiving space for engaging the smooth surface, the suction disc including a central link extending through and to the outside of the pressing lid; c) a stopper on the outer side of the pressing lid, the stopper being integrally formed with the connecting seat and including a lower end, wherein the stopper protrudes from an outer surface of the connecting seat at a position spaced from the pressing lid; d) the pressing lid further including a pressing rod having a pressing end and a connecting end, the connecting end being pivotally connected to the central link for permitting the pressing end to be pivoted between a first position and a second position; e) the connecting end including a first eccentric portion and a second eccentric portion adjacent thereto, the second eccentric portion being disposed beneath the stopper for engaging the lower end thereof; f) the first eccentric portion engaging the pressing lid against the suction disc and moving the central link away from the smooth surface for creating suction between the suction disc and the smooth surface when the pressing end is pivoted into the first position; and g) the second eccentric portion engaging the lower end of the stopper and moving the central link towards the smooth surface to release the pressing lid from the suction disc for reducing the amount of air between the suction disc and the smooth surface when the pressing end is pivoted into the second position.