Paper kicking mechanism and printer utilizing the same

Abstract

A printer of the invention includes a main body, an exit roller and at least one kicking mechanism. The exit roller is rotatably disposed on the main body and comprises a shaft and a rolling portion disposed on the shaft and rotated by the shaft to send paper out of the main body. The kicking mechanism is joined to the shaft and periodically exceeds the exit roller in a paper exit direction to kick the paper from the exit roller.

1 . A paper kicking mechanism for a printer comprising a main body and an exit roller, comprising
 a kicker disposed between the main body and the exit roller and periodically to exceed the exit roller in a paper exit direction so as to kick the paper from the exit roller when the exit roller rotates;   a cam disposed on a shaft of the exit roller, abutting the kicker and rotated about the shaft to reciprocally move the kicker in the paper exit direction to periodically exceed the exit roller; and   an elastic element disposed between the kicker and the main body and biasing the kicker, whereby the kicker is maintained to abut the cam.   
     
     
         2 . The paper kicking mechanism as claimed in  claim 1 , wherein the elastic element is a spring. 
     
     
         3 . The paper kicking mechanism as claimed in  claim 1 , wherein when the point on the cam nearest to the shaft abuts the kicker, the kicker exceeds the exit roller. 
     
     
         4 . The paper kicking mechanism as claimed in  claim 2 , wherein the kicker is near the exit roller and comprises an abutting portion movably disposed on the main body and having a first surface abutting the cam and a second surface biased by the spring and a kicking portion connected to the abutting portion, and when the cam rotates to reciprocate the abutting portion, the kicking portion periodically exceeds the exit roller to kick to exit the paper from the exit roller. 
     
     
         5 . The paper kicking mechanism as claimed in  claim 4 , wherein the kicking portion comprises an upper kicking element connected to the first surface and a lower kicking element connected to the first surface, and the upper kicking element and the lower kicking element are curved and extends to surround the exit roller, and the upper kicking element periodically exceeds the exit roller to kick the paper from the exit roller. 
     
     
         6 . The paper kicking mechanism as claimed in  claim 5 , wherein the surface of the upper kicking element is sawtooth-shaped. 
     
     
         7 . A printer, comprising:
 a main body;   an exit roller rotatably disposed on the main body and comprising a shaft and a rolling portion disposed on the shaft and rotated by the shaft to send paper out of the main body;   at least one kicking mechanism joined to the shaft periodically exceeding the exit roller in a paper exit direction kicking the paper from the exit roller.   
     
     
         8 . The printer as claimed in  claim 7 , wherein the kicking mechanism comprises a kicker disposed between the main body and the shaft periodically exceeding the exit roller in the paper exit direction so as to kick the paper from the exit roller when the exit roller rotates. 
     
     
         9 . The printer as claimed in  claim 8 , wherein the kicking mechanism comprises:
 a cam disposed on a shaft, abutting the kicker and rotated about the shaft to move the kicker reciprocating in the paper exit direction to periodically exceed the exit roller; and   an elastic element disposed between the kicker and the main body and biasing the kicker, whereby the position of the kicker abutting the cam is maintained.   
     
     
         10 . The printer as claimed in  claim 9 , wherein the elastic element is a spring. 
     
     
         11 . The printer as claimed in  claim 9 , wherein when the point on the cam nearest to the shaft abuts the kicker, the kicker exceeds the exit roller. 
     
     
         12 . The printer as claimed in  claim 10 , wherein the kicker is near the exit roller and comprises an abutting portion movably disposed on the main body and having a first surface abutting the cam and a second surface biased by the spring and a kicking portion connected to the abutting portion, and when the cam rotates to reciprocate the abutting portion, the kicking portion periodically exceeds the exit roller to kick the paper from the exit roller. 
     
     
         13 . The printer as claimed in  claim 11 , wherein the kicking portion comprises an upper kicking element connected to the first surface and a lower kicking element connected to the first surface, and the upper kicking element and the lower kicking element are curved and extend to surround the exit roller, and the upper kicking element periodically exceeds the exit roller to kick the paper to exit the exit paper. 
     
     
         14 . The printer as claimed in  claim 13 , wherein the surface of the upper kicking element is sawtooth-shaped.