Abstract: A winding device includes a hand crank, a securing substrate plate, and two unidirectional gears pivotally coupled between the hand crank and the substrate plate by a pivot member. A pivot member is inserted, in one operation, through axial holes of pivot mounting portions of the hand crank and the securing substrate plate, and through a semicircular through holes of the unidirectional gears to pivotally couple the hand crank with the securing substrate plate and unidirectional gears. The pivot member includes two semi-circular pivot portions that are disposed parallel and opposite to each other. Each pivot portion is formed by curling and bending a plate into a semi-circular structure. The pivot portion includes a curved face and two curled portions disposed on an inner side of the curved face. The curled portions have end portions curling in opposite directions and abutting the inner side of the curved face at different points so as to increase the bending strength of the curved face.

Abstract: A dining table consists of a locating frame which is supported by a frame support and is provided with a sliding mechanism mounted thereon to permit opening and closing of a first table top. A second table top is held between two fastening supports of the locating frame on the frame support. The sliding mechanism comprises two slide rail members. Each slide rail member has two slide plates and a frame strip. Each slide plate has four slide wheels and a traction unit fastened on the slide plate. Each slide plate of the two slide plates are slidably engaged on each of the two frame strips of the sliding mechanism. The second table top can be activated to extract or retract in an opening between the first table top after it has been opened on the sliding mechanism.