Media handling mechanism

Abstract

The Media Handling Mechanism application to Media Handling devices includes pickup roller, cam and feed roller. The feed roller feeds the media, then the pickup roller presses the media with friction pad, and picks up the media by rotating motion. The Media Handling Mechanism applies to kinds of the media of different size and thickness. This simple design not only decreases the cost, but also the working efficiency is improved.

What is claimed is:  
     
         1 . A media handling mechanism adopted for use on a media handling device for conveying media contained in a media tray, comprising: 
 a conveying unit rotationally installed in the media handling device including a pickup roller and a cam connected together; and    a friction pad movably located on one side of the conveying unit;    wherein the conveying unit rotates to drive the cam to contact the friction pad to form a gap of a predetermined distance to receive a selected number of the media and the pick-up roller presses the friction pad to pickups the media and carry the media away from the media tray and move the media into the media handling device.    
     
     
         2 . The media handling mechanism of  claim 1 , wherein the pick-up roller and the top surface of the cam are spaced for a predetermined distance.  
     
     
         3 . The media handling mechanism of  claim 1  further having a driving module to provide kinetic energy required by the conveying unit for rotation.  
     
     
         4 . The media handling mechanism of  claim 1 , wherein the pick-up roller and the cam are integrally formed.  
     
     
         5 . The media handling mechanism of  claim 1  further having a first elastic element located on a bottom section of the friction pad to provide a returning elastic force to press the friction pad when the friction pad is depressed.  
     
     
         6 . The media handling mechanism of  claim 5 , wherein the first elastic element is a spring.  
     
     
         7 . The media handling mechanism of  claim 1  further having a realigning element pivotally located on one side of the conveying unit for stopping the media contained in the media tray from entering into the conveying unit.  
     
     
         8 . The media handling mechanism of  claim 7  further having a driven cam rotationally located on one side of the realigning element to press the realigning element to turn to a predetermined angle.  
     
     
         9 . The media handling mechanism of  claim 7 , wherein the realigning element is a realigning hook.  
     
     
         10 . The media handling mechanism of  claim 1  further having a media feeding module for feeding the media fed by the conveying unit to move continuously and prevent media jam from occurring.  
     
     
         11 . The media handling mechanism of  claim 10 , wherein the media feeding module is a feed roller.  
     
     
         12 . The media handling mechanism of  claim 10 , wherein the friction pad is made from rubber.  
     
     
         13 . The media handling mechanism of  claim 1  further having a lifting plate movably located in the media tray.  
     
     
         14 . The media handling mechanism of  claim 13  further having a second elastic element located on a bottom side of the media tray to provide an axial elastic force to lift the lifting plate to a predetermined distance to feed the media held in the media tray into the conveying unit.  
     
     
         15 . The media handling mechanism of  claim 14 , wherein the second elastic element is a spring.