Unloading and feeding device

An unloading and feeding device comprising:

• a driving mechanism comprising:
• a base plate having an edge;
• a movable assembly coupled to the base plate;
• a first limiting member coupled to the base plate;
• and
• a second limiting member coupled to the base plate, wherein the first limiting member and the second limiting member is positioned at opposite sides of the base plate, a distance between the first limiting member and the edge is smaller than the same between the second limiting member and the edge;
• a mounting member coupled to the movable assembly;
• two elastic assemblies coupled to the mounting member and positioned at opposite sides of the movable assembly, and corresponding to the first and second limiting members respectively;
• each of the elastic members comprising:
• a movable member extending through the mounting member;
• a rotating assembly coupled to the mounting member;
• a pressing member coupled to the rotating assembly;
• and
• a picking member coupled to the pressing member, wherein the rotating assembly is configured to rotate the pressing member and the picking member, enabling the pressing member to press one of the movable members of the two elastic assemblies, causing the movable member to protrude out of the mounting member;
• the movable assembly is configured to move the rotating assembly and the mounting member, enabling the movable member to protrude out of the mounting member to resist against the corresponding first or second limiting member.