| 摘要 |
The invention relates to an image changing device, comprising a frame, an at least partially opening display case, within which is a device for winding and unwinding of posters, viewable from at least two different sides, or other advertisements, which may cooperate with a moving strip, whereby said strip may be unwound from a first roller, diverted around at least one deflector roller with a change of running direction and wound on a second roller. One of said rollers has a rigid embodiment and the other roller is provided with at least one pre-tensioned spring and at least one electric drive motor acting directly or indirectly on at least one of the rollers. |
