Patent ID: 8336872

Claim:
A paper feeding module, adapted to a scanning device, wherein the scanning device has a paper feeding path for transmitting papers, the paper feeding module comprising: a first shaft, having a first stopping block; a first ring-shape structure, rotatably covering the first shaft and having a second stopping block and a third stopping block, wherein the first shaft drives the first ring-shape structure to rotate while the second stopping block is pushed by the first stopping block; a paper picking roller, rotatably covering the first shaft, being located on the paper feeding path, and having a fourth stopping block, wherein the first ring-shape structure drives the paper picking roller to rotate while the fourth stopping block is pushed by the third stopping block; and a paper feeding roller, disposed on the paper feeding path, wherein when one paper transmitted in the paper feeding path contacts the picking roller and the paper feeding roller simultaneously, the fourth stopping block divorces from the third stopping block along a tangential direction of the first shaft, and the picking roller and the paper feeding roller rotate with a same tangential speed, wherein the first ring-shape structure is suitable for rotating relatively to the first shaft to drive the second stopping block to divorce from the first stopping block, wherein the first ring-shape structure comprises a first lantern ring and a second lantern ring, the first lantern ring rotatably covers the first shaft and has the second stopping block and a fifth stopping block, the second lantern ring rotatably covers the first shaft and has the third stopping block and a sixth stopping block, and the first lantern ring drives the second lantern ring to rotate while the sixth stopping block is pushed by the fifth stopping block.