Abstract: An apparatus for supporting upon an underlying surface has an adjustable backing plate structure. The backing plate structure has a main backing plate, first and second connecting racks extending from respectively opposite sides of the main backing plate, and a supporting member connected to the first and second connecting racks. The support member is in the form of a roller and is movable between a first position extending in parallel spaced relation to an end of the main backing plate and a second position contacting a bottom surface of the main backing plate. Each of the first and second connecting racks has a locating end received in a slot of the main backing plate so as to be adjustably slidable therein.

Abstract: The present invention provides an adjustable backing plate structure, including a main backing plate, being defined into a plate surface and a bottom surface. A connecting rack includes a locating end and swinging end. The locating end is adapted to the main backing plate, and the swinging end extends to a predefined length. A supporting member is coupled with the swinging end of the connecting rack for synchronous displacement with the swinging end and is placed either underneath or laterally on the bottom surface of the main backing plate. The adjustable backing plate structure can be placed on any support, such as a table surface or two legs, the horizontal level or tilt angle with the displacement of the supporting member being adjusted to realize the benefit of desired ease-of-operation with improved applicability.

Abstract: An inclination-adjusting structure is mounted on a lower portion of a table structure. A coupling bracket is firmly mounted under a table plate. Several slide chutes are formed longitudinally on the coupling bracket. Several positioning holes are arranged in a row between two of the slide chutes. A disk-shaped plate is mounted under the coupling bracket. The disk-shaped plate has an arc-shaped surface. Two slide ribs are formed on the arc-shaped surface in locations corresponding to the slide chutes of the coupling bracket. A positioning pillar is mounted on the arc-shaped surface in the same direction as the positioning holes. The slide ribs are inserted into the slide chutes if the coupling bracket is coupled with the disk-shaped plate. The positioning pillar can be inserted into different positioning hole. In addition, an angle of inclination of the table plate is adjustable by shifting the coupling bracket.