Patent ID: 8882377

Claim:
An image forming apparatus comprising: a body including an image forming part to form an image on a printing medium; and a printing medium feeding cassette including a cassette body, a knock-up plate supported in the cassette body for supporting printing media, and an aligning unit for aligning printing media loaded on the knock-up plate, the aligning unit having a force receiving portion and a first engaging portion movable by the force receiving portion to releasably engage with a second engaging portion of the cassette body, wherein, when a push force is applied in a first adjustment direction to the force receiving portion to move the aligning unit in the first adjustment direction, the force receiving portion rotates about a single fulcrum and moves the first engaging portion upward with respect to and towards the single fulcrum by the rotation of the force receiving portion causing the first engaging portion to be released from the second engaging portion, and wherein, when a pull force is applied in a second adjustment direction which is opposite to the first adjustment direction to the force receiving portion to move the aligning unit in the second adjustment direction, the force receiving portion rotates about the single fulcrum and moves the first engaging portion upward with respect to and towards the single fulcrum by the rotation of the force receiving portion causing the first engaging portion to be released from the second engaging portion.