Paper pick-up module

Abstract

A paper pick-up module. The paper pick-up module comprises a pick plate for loading paper, a pick-up roller disposed above the pick plate to contact and convey the paper, a first elastic member biasing the pick plate upward, a first cam rotatably disposed above the pick plate and contacting the pick plate to make the paper separated from the pick-up roller, a second cam disposed above the pick plate, contacting the pick plate and rotated with the first cam, and a second elastic member biasing the second cam. When the first cam is separated from the pick plate, the pick plate moves upward and contacts the second cam due to the biasing force of the first elastic member, and the rising speed of the pick plate is retarded by the biasing force of the second elastic member.

1 . A paper pick-up module, comprising: 
 a pick plate loading paper;    a pick-up roller disposed above the pick plate to contact and convey the paper;    a first elastic member biasing the pick plate upward enabling the paper to contact the pick-up roller;    a first cam rotatably disposed above the pick plate and moving the pick plate up and down by contacting with and separating from the pick plate to enable the pick-up roller to separate and contact the paper;    a second cam rotatably disposed above the pick plate and rotated by the first cam; and    a second elastic member biasing the second cam, wherein when the first cam rotates to separate from the pick plate, the pick plate moves upward to contact the second cam due to the bias force of the first elastic member, and rising speed of the pick plate is slowed down by the second elastic member biasing the second cam.    
   
   
       2 . The paper pick-up module as claimed in  claim 1 , wherein the first cam and the second cam rotate with respect to the same axis.  
   
   
       3 . The paper pick-up module as claimed in  claim 2 , wherein the pick-up roller, the first cam and the second cam rotate with respect to the same axis.  
   
   
       4 . The paper pick-up module as claimed in  claim 1 , wherein the second cam is adjacent to the first cam.  
   
   
       5 . The paper pick-up module as claimed in  claim 4  further comprising a coupling element disposed on the first cam, wherein when the first cam rotates, the coupling element contacts and rotates the second cam.  
   
   
       6 . The paper pick-up module as claimed in  claim 1 , wherein the pick plate comprises a first groove with which the first cam contacts to move the pick plate up and down.  
   
   
       7 . The paper pick-up module as claimed in  claim 6 , wherein the pick plate further comprises a second groove contacting the second cam.  
   
   
       8 . The paper pick-up module as claimed in  claim 7 , wherein the second groove is longer than the first groove.  
   
   
       9 . The paper pick-up module as claimed in  claim 1 , wherein the pick plate comprises a slot, and when the first cam enters the slot, the pick plate contacts the second cam.  
   
   
       10 . The paper pick-up module as claimed in  claim 1 , wherein the first elastic member is a compression spring.  
   
   
       11 . The paper pick-up module as claimed in  claim 1 , wherein the second elastic member is a torsion spring.