Detachable scanning device

A detachable scanning device, used for scanning a document to be scanned, the detachable scanning device comprising:

• a power transmission module, comprising at least one of an automatic sheet feeding mechanism and a flat drag mechanism, the automatic sheet feeding mechanism comprising a channel roller group, the flat drag mechanism comprising a casing and a transferring part, wherein the transferring part is arranged in the casing to perform a reciprocating motion along a lateral direction;
• and
• a scanning module, detachably connected to the power transmission module, the scanning module comprising a housing and an image sensor, the image sensor movably disposed in the housing;
• wherein when the scanning module is connected to the automatic sheet feeding mechanism, the channel roller group is configured to transfer the document to be scanned along a scanning path to scan the document to be scanned by the image sensor;
• wherein when the scanning module is connected to the flat drag mechanism, the transferring part is configured to move the image sensor along the lateral direction from the housing into the casing to scan the document to be scanned.