Paper transmission apparatus

Abstract

A paper transmission apparatus includes a paper-in mechanism including a first roller, a paper-out mechanism including a second roller, a gear assembly, and a swing member. The swing member is connected to the first roller to the gear assembly. The first roller is rotatable along a first direction to rotate the swing member, and the swing member is capable of moving the gear assembly to be meshed with the second roller, to accelerate a rotating speed of the second roller being greater than a rotating speed of the first roller. The first roller is rotatable along a second direction opposite to the first direction to rotate the swing arm, and the swing arm is capable of moving the gear assembly to be meshed with the second roller, to decelerate the rotating speed of the second roller being smaller than the rotating speed of the firs roller.

What is claimed is: 
     
         1 . A paper transmission apparatus comprising:
 a paper-in mechanism comprising a first roller;   a paper-out mechanism comprising a second roller;   a gear assembly meshed with the first roller; and   a swing member connecting the first roller to the gear assembly,   wherein the first roller is rotatable along a first direction to rotate the swing member, the swing member is configured to move the gear assembly to be meshed with the second roller, to accelerate a rotating speed of the second roller to be greater than a rotating speed of the first roller; the first roller is rotatable along a second direction opposite to the first direction to rotate the swing member, the swing member is configured to move the gear assembly to be meshed with the second roller, and to decelerate the rotating speed of the second roller to be smaller than the rotating speed of the first roller.   
     
     
         2 . The paper transmission device of  claim 1 , wherein the paper-in mechanism comprises a paper-in shaft, the first roller is secured to the paper-in shaft rotated with the first roller, and the swing member is pivotally secured to the paper-in shaft. 
     
     
         3 . The paper transmission device of  claim 2 , wherein the swing member comprises a swing arm, the swing arm defines a rotating hole, and the paper-in shaft and an inner wall of the rotating hole are frictionally contacted. 
     
     
         4 . The paper transmission device of  claim 3 , wherein the swing member further comprises a firs pivot post, the gear assembly comprises a first gear and a connecting arm, and the first pivot post extends through the first gear to be engaged in the connecting arm. 
     
     
         5 . The paper transmission device of  claim 4 , wherein the first gear is meshed with the first roller and the second roller, and capable of accelerating the rotating speed of the second roller when the first roller is rotated along the first direction. 
     
     
         6 . The paper transmission device of  claim 4 , wherein the swing member further comprises a second pivot post, the gear assembly further comprises a second gear, and the second pivot post extends through the second gear to be engaged in the connecting arm. 
     
     
         7 . The paper transmission device of  claim 6 , wherein the second gear is meshed with the first roller and the second roller, and capable of decelerating the rotating speed of the second roller when the first roller is rotated along the second direction. 
     
     
         8 . The paper transmission device of  claim 6 , wherein the first pivot post and the second pivot post are located on the swing arm, and the first pivot post, the second pivot post, and the rotating hole are arranged at three corners of an equilateral triangle area. 
     
     
         9 . The paper transmission device of  claim 6 , wherein the paper-out mechanism comprises a paper-out shaft, and the second roller is secured to the paper-out shaft rotated with the second gear. 
     
     
         10 . A printer device comprising:
 a base;   a paper-in mechanism attached to the base and comprising a first roller;   a paper-out mechanism attached to the base and comprising a second roller;   a gear assembly comprising a first gear and a second gear; and   a swing member connecting the first roller to the gear assembly,   wherein the first roller is rotatable along a first direction to rotate the swing member, the swing member is configured to move the gear assembly to mesh the first gear with the second roller, to accelerate a rotating speed of the second roller to be greater than a rotating speed of the first roller; the first roller is rotatable along a second direction opposite to the first direction to rotate the swing member, the swing member is configured to move the gear assembly to mesh the second gear with the second roller, to decelerate the rotating speed of the second roller to be smaller than the rotating speed of the first roller.   
     
     
         11 . The printer device of  claim 10 , wherein the paper-in mechanism comprises a paper-in shaft, the first gear is secured to the paper-in shaft rotated with the first gear, and the swing member is pivotally secured to the paper-in shaft. 
     
     
         12 . The printer device of  claim 11 , wherein the swing member comprises a swing arm, the swing arm defines a rotating hole, and the paper-in shaft and an inner wall of the rotating hole are frictionally contacted. 
     
     
         13 . The printer device of  claim 12 , wherein the swing member further comprises a first pivot post, the gear assembly further comprises a connecting arm, and the first pivot post extends through the first gear to be engaged in the connecting arm. 
     
     
         14 . The printer device of  claim 13 , wherein the swing member further comprises a second pivot post, and the second pivot post extends through the second gear to be engaged in the connecting arm. 
     
     
         15 . The printer device of  claim 14 , wherein the first pivot post and the second pivot post are located on the swing arm, and the first pivot post, the second pivot post, and the rotating hole are arranged at three corners of an equilateral triangle area. 
     
     
         16 . The printer device of  claim 10 , wherein the paper-out mechanism comprises a paper-out shaft, and the second gear is secured to the paper-out shaft rotated with the second gear. 
     
     
         17 . The printer device of  claim 11 , wherein the base defines a first receiving slot, and the paper-in shaft is received in the first receiving slot. 
     
     
         18 . The printer device of  claim 16 , wherein the base defines a second receiving slot parallel to the first receiving slot, and the paper-out shaft is received in the second receiving slot.