Patent ID: 8657280

Claim:
A paper-feeding device, comprising: an outer case, having a pair of first side-walls, a pair of openings and a pair of slots, wherein each of the openings and each of the slots are correspondingly disposed on each of the first side-walls and each of the slots is located on a corresponding opening; an inner case, located beside the pair of first side-walls of the outer case and having a second side-wall, wherein the second side-wall has a position-limiting rib and the position-limiting rib is protruding towards the first side-walls; and a retainer, located between the pair of first side-walls and having a body, a protrusion and a pivot, wherein the body has a top-portion and a retaining-portion, the protrusion is disposed at the top-portion and correspondingly located in the pair of slots, and the pivot is located between the protrusion and the retaining-portion and correspondingly locked in the openings, during a feeding paper process, the inner case moves relative to the outer case, the pivot of the retainer moves relative to the position-limiting rib, the retainer anticlockwise rotates around the pivot as the rotation center axis from a retaining position to a paper-feeding position, and the position-limiting rib interferes with the pivot of the retainer so as to fix the retainer at the paper-feeding position.