| 摘要 |
<p>Disclosed is a billboard. The billboard comprises an outer frame (10), hollow triangular advertising prisms (20) each having surfaces provided with advertising patterns and both ends which are rotatably supported by upper and lower bars of the outer frame; a pair of rotation support sections (40, 50) for rotatably supporting both ends of each hollow triangular advertising prism, one of the rotation support sections having a triangular driving piece; a belt (60) for drivably surrounding apexes and sides of triangular driving pieces; a slot (67) defined through the belt so that one apexes of the triangular driving pieces can be temporarily inserted into and removed out of the slot and thereby the triangular driving pieces can be rotated inside the belt without being hindered; and a power transmitting section rotated integrally with the belt to sequentially rotate the triangular driving pieces.</p> |
