Printing medium supply device and image forming apparatus having the same

摘要

A printing medium supply device and an image forming apparatus having the same are provided. The printing medium supply device may include a pickup unit and an adjustment unit. The pickup unit may include a shaft, a pickup roller spaced apart from the shaft to come into contact with printing media, a pickup holder to support the pickup roller, the pickup holder being rotated about the shaft to lift or lower the pickup roller, and a link member connected to the pickup holder so as to be rotated about the shaft. The adjustment unit may include a pressure member coming into contact with a pressure applied portion of the link member to rotate the link member by applying pressure thereto, and an elastic member elastically supported by the pressure member to transmit elastic force to the link member. This configuration ensures constant pickup pressure despite variation in the quantity of printing media.

主权项

1. A printing medium supply device comprising:
a pickup roller configured to come into contact with a printing medium; a pickup holder configured to support the pickup roller, the pickup holder being rotated about a shaft to lift or lower the pickup roller; a link member connected to the pickup holder so as to be rotated about the shaft; a pressure member coming into contact with a pressure applied portion of the link member to rotate the link member by applying pressure to the link member; and an elastic member elastically supported by the pressure member to transmit elastic force to the link member, wherein the pickup holder includes: a holder body configured to be pivotally rotated about the shaft; a holder rotating portion which has a cylindrical shape and which is coupled to the shaft at one side of the holder body; a holder support portion configured to support the pickup roller at the other side of the holder body; and wherein the link member protrudes from the holder rotating portion and has a cylindrical shape.