Optical scanning device

Abstract

An optical scanning device with a dustproof function includes a shell defining a first receiving room and a second receiving room communicating with the first receiving room through an open window defined on the shell for scanning light beams passing therethrough. An optical scanning module is mounted in the first receiving room. A glass platform is located on the second receiving room at a position facing the open window for insulating the first receiving room from the outside of the shell. A correcting plate is stuck on the bottom of the glass platform. Such structure of the optical scanning device enables the glass platform to be firstly assembled with the shell in a dustless chamber, which prevents the suspending dust from falling in the first receiving room and attaching to the optical scanning module during the subsequent assembly process and ensures the scanning quality of the optical scanning device.

1 . An optical scanning device, comprising:
 a shell defining a receiving room and an open window for scanning light beams passing therethrough;   an optical scanning module mounted in the receiving room of the shell; and   a glass platform located on the shell at a position facing the open window for insulating the receiving room from the outside of the shell.   
   
   
       2 . The optical scanning device as claimed in  claim 1 , wherein the optical scanning module is a charge coupled device used to convert an optical signal into a digital signal. 
   
   
       3 . The optical scanning device as claimed in  claim 1 , further comprising a correcting plate stuck on the bottom of the glass platform. 
   
   
       4 . The optical scanning device as claimed in  claim 1 , wherein the shell defines a second receiving room above the receiving room, the open window is defined between the receiving room and the second receiving room to make the receiving room communicate with the second receiving room. 
   
   
       5 . The optical scanning device as claimed in  claim 4 , wherein the top of the second receiving room defines a locating groove in an inner side thereof, the glass platform is mounted in the locating groove. 
   
   
       6 . The optical scanning device as claimed in  claim 1 , wherein the optical scanning device is adapted to be used in a double-side scanner comprising two of the optical scanning devices, the two optical scanning devices are respectively named a first optical scanning device and a second optical scanning device, and the second optical scanning device is inversely disposed above the first optical scanning device, the two optical scanning devices face each other. 
   
   
       7 . The optical scanning device as claimed in  claim 6 , wherein each of the two optical scanning devices further comprises a correcting plate stuck on the bottom of the glass platform, the correcting plate of the first optical scanning device faces the open window of the second optical scanning device, and the correcting plate of the second optical scanning device faces the open window of the first optical scanning device.