Printer

Abstract

A printer. The printer comprises a base having an incline surface for paper on which a depression is formed, a shaft disposed above the incline surface, an arm pivoted on the shaft, a pick-up roller disposed on the tip of the arm, and a free arm with one end pivoted on the arm and the other end free. When the paper on the incline surface runs out, the free arm is rotated and the free end enters and abuts the depression, whereby the arm is supported by the free arm to maintain an appropriate distance to the incline surface.

1 . A printer, comprising: 
 a base having an incline surface for paper on which a depression is formed;    a shaft disposed above the incline surface;    an arm pivoted on the shaft;    a pick-up roller disposed on the tip of the arm; and    a free arm with one end pivoted on the arm and the other end free, wherein when the paper on the incline surface runs out, the free arm is rotated and the free end enters and abuts the depression, whereby the arm is supported by the free arm to maintain an appropriate distance from the incline surface.    
   
   
       2 . The printer as claimed in  claim 1 , wherein the free arm is rotated by gravity, whereby the free end enters the depression.  
   
   
       3 . The printer as claimed in  claim 1  further comprising an elastic element disposed between the arm and the free arm and biasing the free arm, wherein when the paper on the incline surface runs out, the free arm rotates and the free end enters the depression.  
   
   
       4 . The printer as claimed in  claim 3 , wherein the elastic element comprises a torsion spring.  
   
   
       5 . The printer as claimed in  claim 3 , wherein the elastic element comprises an expansion spring with one end disposed on the arm and the other end disposed on the free arm.  
   
   
       6 . The printer as claimed in  claim 4 , wherein the free arm comprises a post on which the torsion spring is disposed.  
   
   
       7 . The printer as claimed in  claim 1 , wherein the arm comprises a hole and the free arm comprises a shaft element inserted into the hole, whereby the free arm is pivoted on the arm.  
   
   
       8 . The printer as claimed in  claim 1 , wherein the arm comprises a shaft element and the free arm comprises a hole into which the shaft element is inserted, whereby the free arm is pivoted on the arm.  
   
   
       9 . The printer as claimed in  claim 8  further comprising a pin connecting the shaft element and the hole.  
   
   
       10 . The printer as claimed in  claim 1 , wherein the arm comprising a transmission mechanism driven by the shaft to rotate the pick-up roller to pick up the paper.