Media pick-up device of media dispenser

Abstract

Disclosed is a media pickup device of a media dispenser which can use various kinds of media having different thickness by varying an overlap amount between a feeding roller and a separating roller. To this end, the device comprises: a feeding roller and a separating roller arranged with a predetermined interval for separating media discharged from a media cassette sheet by sheet and feeding; and a variable means for varying an overlap amount between the feeding roller and the separating roller according to thickness of media.

What is claimed is:  
     
         1 . A media pickup device of a media dispenser comprising: 
 a feeding roller and a separating roller arranged with a predetermined interval for separating media discharged from a media cassette sheet by sheet and feeding; and    a variable means for varying an overlap amount between the feeding roller and the separating roller according to thickness of media.    
     
     
         2 . The device of  claim 1 , wherein a one-way clutch which makes the separating roller maintain a static state in a direction where media pass and rotate in the opposite direction thereof is installed at a rotation shaft of the separating roller.  
     
     
         3 . The device of  claim 1 , wherein the variable means comprises: 
 a supporting bracket for supporting both ends of the rotation shaft of the separating roller;    a supporting shaft for rotatably supporting another side of the supporting bracket; and    a torsion spring installed between the supporting shaft and the supporting bracket for providing a predetermined elastic force to push the separating roller to the feeding roller.    
     
     
         4 . The device of  claim 3 , wherein one side of the supporting bracket is fixed to both ends of the rotation shaft of the separating roller, another side thereof is rotatably supported by being inserted to the supporting shaft, and a stopper for determining an initial overlap amount between the feeding roller and the separating roller is formed at one side thereof.  
     
     
         5 . The device of  claim 4 , wherein the stopper is prolonged from one side of the supporting bracket and blocked by a blocking pin fixed to a base plate.  
     
     
         6 . The device of  claim 3 , wherein an initial overlap amount between the feeding roller and the separating roller is set on the basis of a case that thickness of the media is minimum.  
     
     
         7 . The device of  claim 3 , wherein the torsion spring is wound on the supporting shaft, and is formed as a coil spring of which one end is fixed on the supporting shaft and another end is fixed to the supporting bracket.  
     
     
         8 . A media pickup device of a media dispenser comprising: 
 a feeding roller and a separating roller arranged with a predetermined interval for separating media discharged from a media cassette sheet by sheet and feeding;    a variable means for varying an overlap amount between the feeding roller and the separating roller according to thickness of media; and    an adjusting unit for adjusting a maximum overlap amount between the feeding roller and the separating roller.    
     
     
         9 . The device of  claim 8 , wherein the variable means for varying the overlap amount comprises: 
 a supporting bracket for supporting both ends of the rotation shaft of the separating roller;    a supporting shaft for fixing another side of the supporting bracket and being rotatably supported by a base plate; and    a tension spring connected to one side of the supporting shaft for pushing the separating roller to the feeding roller.    
     
     
         10 . The device of  claim 9 , wherein the tension spring is a coil spring connected between a connection bracket fixed to one side of the supporting shaft and a connection rod fixed to the base plate.  
     
     
         11 . The device of  claim 10 , wherein a stopper for determining an initial overlap amount between the feeding roller and the separating roller is contacted on a front surface of the connection frame, and an adjusting unit for adjusting a maximum overlap amount between the feeding roller and the separating roller is installed at a rear surface of the connection frame.  
     
     
         12 . The device of  claim 11 , wherein the adjusting unit comprises an adjusting bracket fixed to a base plate, and an adjusting bolt screw-engaged to the adjusting bracket and thus contacted to the rear surface of the connection frame for adjusting a maximum rotation amount of the supporting shaft.  
     
     
         13 . A media pickup device of a media dispenser comprising: 
 a feeding roller and a separating roller arranged with a predetermined interval for separating media discharged from a media cassette sheet by sheet and feeding;    a tension spring for pushing the separating roller to the feeding roller in order to vary an overlap amount therebetween according to thickness of media; and    a tension adjusting means for adjusting tension of the tension spring.    
     
     
         14 . The device of  claim 13 , wherein one side of a supporting bracket supports both ends of the rotation shaft of the separating roller, another side thereof is fixed to a supporting shaft, the supporting shaft is rotatably supported by a base plate, a connection frame is fixed at one side of the supporting shaft, and the tension adjusting means supports the tension spring at one side of the connection frame.  
     
     
         15 . The device of  claim 14 , wherein the tension adjusting means is an adjusting bolt for adjusting tension of a spring by being inserted to a through hole formed at the connection frame and screw-engaged to the base plate.  
     
     
         16 . The device of  claim 15 , wherein the tension spring is a coil spring supported at a bolt head of the adjusting bolt and a lateral surface of the connection frame.  
     
     
         17 . The device of  claim 14 , wherein a stopper for determining an initial overlap amount between the feeding roller and the separating roller by limiting movement of the connection bracket is contacted on a front surface of the connection bracket, and an adjusting unit for adjusting a maximum overlap amount between the feeding roller and the separating roller by adjusting rotation amount of the rotation shaft is installed at a rear surface of the connection bracket.  
     
     
         18 . The device of  claim 17 , wherein the adjusting unit comprises an adjusting bracket fixed to a base plate, and an adjusting bolt screw-engaged to the adjusting bracket and thus contacted to a rear surface of the connection frame for adjusting a maximum rotation amount of the supporting shaft.  
     
     
         19 . A media dispenser comprising: 
 a media pickup unit for discharging media stored in a media cassette by separating sheet by sheet;    a media feeding unit for feeding the media discharged through the media pickup unit; and    is a media discharging unit for discharging the media fed through the media feeding unit to outside,    in which the media pickup unit comprises: 
 a feeding roller and a separating roller for separating media discharged from the media cassette sheet by sheet and feeding; and  
 a variable means for varying an overlap amount between the feeding roller and the separating roller according to thickness of media by being connected to the separating roller.  
   
     
     
         20 . The media dispenser of  claim 19 , wherein the variable means comprises: 
 a supporting bracket for supporting both ends of the rotation shaft of the separating roller;    a supporting shaft for rotatably supporting another side of the supporting bracket; and    a torsion spring installed between the supporting shaft and the supporting bracket for providing a predetermined elastic force to push the separating roller to the feeding roller.    
     
     
         21 . The media dispenser of  claim 20 , wherein one side of the supporting bracket is fixed to both ends of the rotation shaft of the separating roller, another side thereof is rotatably supported by being inserted to the supporting shaft, and a stopper for determining an initial overlap amount between the feeding roller and the separating roller is formed at one side thereof.