Patent ID: 7121026

Claim:
An advertisement billboard comprising: at least one polyhedral column and a driving mechanism provided on a frame; wherein each plane of the polyhedral column is an exhibiting board having an obverse side and a reverse side, and is capable of rotating using a spindle provided at the upper and lower end of the exhibiting board, respectively; each obverse side of the exhibiting board outwardly displays an advertisement in sequence and automatically deviates after the obverse side passes through a front of the advertisement billboard; and each reverse side of the exhibiting boards outwardly displays an advertisement when the polyhedral column rotates for a second revolution, thereby enabling the advertisement billboard to display a multiple of planar advertisements, wherein the driving mechanism further comprising: upper and lower turnables disposed at the upper and lower ends of the polyhedral column; axis openings provided for pivotally connecting for rotation at corresponding locations to the spindle of the exhibiting board; a driven gear further provided where the spindle is inserted through a corresponding axis opening at the upper and lower turnables having centers thereof pivotally disposed at the frame for rotation; a driving wheel assembly disposed at the frame and consisted of a plurality of gears and drive shafts, and a turnable gear provided correspondingly at one of the centers of the upper and lower turnables, so as to drive and rotate the turnable gear when the gears and drive shafts are impelled and rotated for further rotating the polyhedral column such that the exhibiting boards and driven gears circle around the center fo the polyhedral column, respectively; and a plurality of retaining flanges disposed at the periphery of the upper or lower turnable correspondingly to the driven gear, such that the locations of the retaining flanges are exactly at the circumference of the driven gear in circular motions when the driven gear circles around the center of the upper or lower turnables resulted from rotation of the upper and lower turnables; and after the driven gear passed through one of the retaining flanges, the driven gear deviates an angle relative to the turnable due to the contact with and blocking of one of the retaining flanges, and further simultaneously deviating the spindle and the exhibiting board relative to the turnable.