Media conveying apparatus

Abstract

A media conveying apparatus includes a roller provided rotatably around a rotation shaft, a drive shaft mechanically coupled to the rotation shaft, a holder holding the rotation shaft and the drive shaft, a driving source, and a drive coupling to transmit a driving force from the driving source to the drive shaft. The holder has a swing shaft about which the holder swings, and a distance between the drive shaft and the swing shaft is smaller than a distance between the rotation shaft and the swing shaft.

1 . A media conveying apparatus comprising:
 a roller provided rotatably around a rotation shaft;   a drive shaft mechanically coupled to the rotation shaft;   a holder holding the rotation shaft and the drive shaft, the holder having a swing shaft about which the holder swings;   a driving source; and   a drive coupling to transmit a driving force from the driving source to the drive shaft,   wherein a distance between the drive shaft and the swing shaft is smaller than a distance between the rotation shaft and the swing shaft.   
     
     
         2 . The media conveying apparatus according to  claim 1 , further comprising a guide to guide a medium,
 wherein a distance between the drive shaft and the guide is larger than a distance between the swing shaft and the guide.   
     
     
         3 . The media conveying apparatus according to  claim 1 ,
 wherein the drive coupling includes a universal joint.   
     
     
         4 . The media conveying apparatus according to  claim 3 , further comprising another drive shaft located outside the holder and is rotated by the driving source,
 wherein the universal joint couples the drive shaft and said another drive shaft in a tiltable manner.   
     
     
         5 . The media conveying apparatus according to  claim 1 ,
 wherein the swing shaft is located on the same side as the roller with respect to a virtual plane defined by extending a nip plane of the roller in a media conveyance direction.   
     
     
         6 . The media conveying apparatus according to  claim 1 , further comprising a torque limiter on the rotation shaft. 
     
     
         7 . The media conveying apparatus according to  claim 1 , further comprising an electromagnetic clutch to control a load applied to the roller through the drive coupling. 
     
     
         8 . The media conveying apparatus according to  claim 1 ,
 wherein the distance between the rotation shaft and the swing shaft is smaller than a diameter of the roller.