Paper feeding device and multi-function printer using the same

Abstract

A paper feeding device and a multi-function printer using the same are provided. At least one paper is fed from a paper entrance toward a paper exit by the paper feeding device, and the paper feeding device includes a first feeding path, a second feeding path, a pickup roller component and a suction element. The first feeding path intersects with a first end of the second feeding path so as to form a first intersection. The pickup roller component is disposed on the first feeding path to feed the paper located at the paper entrance into the first feeding path. The suction element is disposed above the first intersection and provides a suction. When the paper passes through the pickup roller component and is located between the pickup roller component and the suction element, the suction element guides the paper closest to the suction element onto the first feeding path.

What is claimed is: 
     
         1 . A paper feeding device, adapted to feed at least one paper, wherein the feeding paper device provides the at least one paper to be fed from a paper entrance toward a paper exit, the paper feeding device comprising:
 a first feeding path;   a second feeding path, wherein the first feeding path intersects with a first end of the second feeding path, so as to form a first intersection;   a pickup roller component, disposed on the first feeding path to feed the at least one paper located at the paper entrance into the first feeding path; and   a suction element, disposed above the first intersection and providing a suction, wherein when the at least one paper passes through the pickup roller component and is located between the pickup roller component and the suction element, the suction element guides a paper closest to the suction element onto the first feeding path, in the meantime, another paper below the paper closest to the suction element enters the second feeding path.   
     
     
         2 . The paper feeding device according to  claim 1 , further comprising:
 a first paper sensor, located on the second feeding path, and detecting whether the at least one paper passes through the second feeding path.   
     
     
         3 . The paper feeding device according to  claim 1 , further comprising:
 a second paper sensor, located on the first feeding path, and detecting whether the at least one paper passes through the first feeding path.   
     
     
         4 . The paper feeding device according to  claim 1 , wherein the pickup roller component comprises:
 a pickup roller, disposed at the paper entrance; and   a separation roller component, located between the suction element and the pickup roller.   
     
     
         5 . The paper feeding device according to  claim 1 , further comprising:
 a paper-out roller component, disposed at the paper exit and located on the first feeding path, wherein the paper-out roller component rotates toward a first direction, so as to feed the at least one paper located at the first feeding path out of the paper exit.   
     
     
         6 . The paper feeding device according to  claim 1 , wherein a second end of the second feeding path relative to the first end intersects with the first feeding path so as to form a second intersection. 
     
     
         7 . The paper feeding device according to  claim 6 , further comprising:
 a third feeding path, connected between the paper exit and the second feeding path.   
     
     
         8 . The paper feeding device according to  claim 7 , wherein the paper-out roller component rotates toward a second direction, so as to enter the at least one paper into the second feeding path via the third feeding path, so that the at least one paper passes through the second intersection and re-enters into the first feeding path. 
     
     
         9 . The paper feeding device according to  claim 1 , wherein an air outlet of the suction element faces a high-temperature element, and is configured to guide a heat dissipation airflow onto the high-temperature element. 
     
     
         10 . A multi-function printer, comprising:
 a body, having a paper entrance and a paper exit;   a paper feeding device, providing at least one paper to be fed from the paper entrance toward the paper exit, the paper feeding device comprising:
 a first feeding path; 
 a second feeding path, wherein the first feeding path intersects with a first end of the second feeding path, so as to form a first intersection; 
 a pickup roller component, disposed on the first feeding path to feed the at least one paper located at the paper entrance into the first feeding path; and 
 a suction element, disposed above the first intersection and providing a suction, wherein when the at least one paper passes through the pickup roller component and is located between the pickup roller component and the suction element, the suction element guides a paper closest to the suction element onto the first feeding path, in the meantime, another paper below the paper closest to the suction element enters the second feeding path; and 
   an image processing unit, disposed inside the body and located on the first feeding path, so as to perform an image process on the paper passing through the first feeding path.   
     
     
         11 . The multi-function printer according to  claim 10 , wherein the paper feeding device further comprises:
 a first paper sensor, located on the second feeding path, and detecting whether the at least one paper passes through the second feeding path.   
     
     
         12 . The multi-function printer according to  claim 10 , wherein the paper feeding device further comprises:
 a second paper sensor, located on the first feeding path, and detecting whether the at least one paper passes through the first feeding path.   
     
     
         13 . The multi-function printer according to  claim 10 , wherein the pickup roller component comprises:
 a pickup roller, disposed at the paper entrance; and   a separation roller component, located between the suction element and the pickup roller.   
     
     
         14 . The multi-function printer according to  claim 10 , wherein the paper feeding device further comprises:
 a paper-out roller component, disposed at the paper exit and located on the first feeding path, wherein the paper-out roller component rotates toward a first direction, so as to feed the at least one paper located at the first feeding path out of the paper exit.   
     
     
         15 . The multi-function printer according to  claim 10 , wherein a second end of the second feeding path relative to the first end intersects with the first feeding path so as to form a second intersection. 
     
     
         16 . The multi-function printer according to  claim 15 , wherein the paper feeding device further comprises:
 a third feeding path, connected between the paper exit and the second feeding path.   
     
     
         17 . The multi-function printer according to  claim 16 , wherein the paper-out roller component rotates toward a second direction, so as to enter the at least one paper into the second feeding path via the third feeding path, so that the at least one paper passes through the second intersection and re-enters into the first feeding path. 
     
     
         18 . The multi-function printer according to  claim 10 , wherein an air outlet of the suction element faces a high-temperature element, and is configured to guide a heat dissipation airflow onto the high-temperature element.