Sheet feed mechanism of printer, and printer

Abstract

A sheet feed mechanism of a printer includes a sheet feed roller arranged so as to be rotatable about an axis in a direction orthogonal to a sheet conveying direction in plan view such that its apex is made to face a sheet conveying path on the downstream side in the sheet conveying direction, a sheet pressure-contact member arranged to be capable of pressing a sheet against the sheet feed roller, and a sheet trailing end guide portion having a guide surface which gradually guides a trailing end of the sheet released from abutment on the sheet feed roller toward the downstream in the sheet conveying direction.

1 . A sheet feed mechanism of a printer comprising:
 a sheet feed roller arranged so as to be rotatable about an axis in a direction orthogonal to a sheet conveying direction such that an apex of the sheet fee roller is made to face a sheet conveying path on a downstream side in the sheet conveying direction;   a sheet pressure-contact member arranged to be capable of pressing a sheet against the sheet feed roller; and   a sheet trailing end guide portion having a guide surface which gradually guides a trailing end of the sheet released from abutment on the sheet feed roller toward the downstream in the sheet conveying direction.   
   
   
       2 . The sheet feed mechanism of a printer according to  claim 1 ,
 wherein the sheet trailing end guide portion is formed at least at one of both axial ends of the sheet feed roller so as to project a sheet guide surface constituting the sheet conveying path to be lower than the apex of the sheet feed roller, and so as to project toward the downstream in the sheet conveying direction farther than a downstream end of the sheet feed roller in the sheet conveying direction.   
   
   
       3 . The sheet feed mechanism of a printer according to  claim 1 ,
 wherein a plurality of the sheet feed rollers are arranged in series in the direction orthogonal to the sheet conveying direction, and one or a plurality of sheet feed rollers corresponding to the width dimensions of sheets are used to convey the sheets, and   wherein the sheet trailing end guide portion is formed at least at one of both axial ends of each of the sheet feed rollers so as to project a sheet guide surface constituting the sheet conveying path to be lower than the apex of each of the sheet feed rollers, and so as to project toward the downstream in the sheet conveying direction farther than a downstream end of each of the sheet feed rollers in the sheet conveying direction.   
   
   
       4 . The sheet feed mechanism according to  claim 2 , wherein the sheet trailing end guide portion is formed as a circular-arc convex portion in a section in the sheet conveying direction. 
   
   
       5 . The sheet feed mechanism according to  claim 3 ,
 wherein the sheet trailing end guide portion is formed as a circular-arc convex portion in a section in the sheet conveying direction.   
   
   
       6 . A printer comprising the sheet feed mechanism according to  claim 1 . 
   
   
       7 . A printer comprising the sheet feed mechanism according to  claim 2 . 
   
   
       8 . A printer comprising the sheet feed mechanism according to  claim 3 .