Paper ejection apparatus having a driving wheel moveable with an inner door

Abstract

A paper ejection apparatus of a multifunctional business machine having a driving wheel installed on a rotatable inner door allows the driving wheel to move with the inner door, and therefore provides sufficient space for cartridge replacement when the inner door is opened. A height difference between a platform and an end of a slit of the housing of the multifunctional business machine allows the driving wheel and an exit roller to have an interfering pre-stress in between when the inner door is closed. The driving wheel is not interfered by the exit roller when the inner door is opening, which prevents the driving wheel from deviating, imprecise homing, or even falling when the inner door is opening or closing.

1 . A paper ejection apparatus having a driving wheel moveable with an inner door, comprising:
 a housing having a first slit, the housing comprising a platform located at an end of the first slit, forming a height difference between the platform and the first slit;   an inner door rotatably connected to the housing, the inner door comprising a guiding shaft located on the platform capable of sliding along the first slit after the inner door is lifted by the height difference when opening the inner door;   an exit roller rotatably installed in the housing; and   a driving wheel rotatably installed on the inner door for being pushed against by the exit roller with interference when the guiding shaft is located on the platform, a gap existing between the driving wheel and the exit roller when the inner door is lifted by the height difference.   
     
     
         2 . The paper ejection apparatus of  claim 1  wherein the gap provides a non-interfering distance for the driving wheel and the exit roller, avoiding the driving wheel from being pushed against by the exit roller when the guiding shaft slides along the first slit. 
     
     
         3 . The paper ejection apparatus of  claim 1 , further comprising a second elastic element assembled with the driving wheel and fixed on the inner door with the two ends of the second elastic element, the second elastic element allowing the driving wheel installed on the inner door for moving close to or away from the inner door. 
     
     
         4 . The paper ejection apparatus of  claim 1  wherein the housing further comprising a spindle hole, the inner door further comprising a rotary shaft with one end rotatably disposed in the spindle hole, the rotary shaft, the guiding shaft, and the driving wheel being lifted by the height difference when the inner door is lifted by the height difference. 
     
     
         5 . The paper ejection apparatus of  claim 1  wherein the end of the first slit of the housing is higher than the platform. 
     
     
         6 . The paper ejection apparatus of  claim 1  wherein the inner door further comprising a restoring pin, the housing further comprising a second slit, the restoring pin extending through the second slit and sliding along the second slit when the inner door rotates along the first slit. 
     
     
         7 . The paper ejection apparatus of  claim 6  wherein the first slit and the second slit have an arc shape. 
     
     
         8 . The paper ejection apparatus of  claim 6 , further comprising a first elastic element connecting between the restoring pin and the housing for pulling the inner door. 
     
     
         9 . The paper ejection apparatus of  claim 8  wherein the first elastic element is a spring. 
     
     
         10 . The paper ejection apparatus of  claim 1  wherein the housing further comprising a protrusion for holding the inner door. 
     
     
         11 . The paper ejection apparatus of  claim 1  wherein the driving wheel is a star wheel. 
     
     
         12 . The paper ejection apparatus of  claim 1  wherein the driving wheel is a round wheel. 
     
     
         13 . The paper ejection apparatus of  claim 1  wherein the platform and the height difference between the platform and the first slit form an L shape.