Patent ID: 8899580

Claim:
A sheet-like medium stack guiding device, comprising: at least one of a left limit plate and a right limit plate located at an outer end of a medium passage which is formed by a left passage plate and a right passage plate; and a driving mechanism being in a transmission connection with at least one of the left limit plate and the right limit plate, and adapted to drive at least one of the left limit plate and the right limit plate to move in a medium length direction; wherein the driving mechanism comprises a screw shaft and a screw driving motor which are connected together by a gear set, and wherein the screw shaft is provided with threads having opposite screwing directions at a left end and a right end thereof respectively, the left limit plate and the right limit plate are provided with nuts corresponding to the threads of the screw shaft respectively, and the screw shaft is slidably mounted between the left limit plate and the right limit plate so that the left limit plate and the right limit plate are driven to move towards or away from each other under the driving of the screw motor; two ends of a guiding shaft is fixed to the left passage plate and the right passage plate respectively, and the guiding shaft is configured to pass through the left limit plate and the right limit plate; and the left limit plate is coupled to a left guiding plate via a first left limit plate rotating shaft in such a manner to be rotatable and slidable in a guiding groove of the left guiding plate, the left guiding plate is rotatably connected to a left fixing plate via a second left guiding plate rotating shaft and a third left guiding plate rotating shaft, and the left fixing plate is fixed to the left passage plate; the right limit plate is coupled to a right guiding plate via a first right limit plate rotating shaft in such a manner to be rotatable and slidable in a guiding groove of the right guiding plate, the right guiding plate is rotatably connected to a right fixing plate via a second right guiding plate rotating shaft and a third right guiding plate rotating shaft, and the right fixing plate is fixed to the right passage plate.