| 摘要 |
An image-changing signboard comprising an upper and a lower horizontal frame member ( 12, 14 ) having a substantially U-shaped cross-section. A plurality of vertical bar-shaped display elements having a triangular cross-section are rotatably mounted in the upper and lower frame members. Individual gear units ( 26, 32 ) are mounted in one ( 12 ) of the horizontal frame members for rotating a respective display element ( 18 ). A drive motor ( 20 ) is connected to a common drive shaft ( 24 ) for simultaneously rotating respective gear units ( 26, 32 ). A plurality of gear units ( 26, 32 ) are mounted on a common mounting plate ( 22 ) so as to form a drive module, which is slidably mounted on tracks ( 40 ) in one ( 12 ) of the U-shaped horizontal frame members and which form a bottom plate bridging the gap between the legs of the frame member ( 12 ) and facing the signboard display.
|
