| 摘要 |
PURPOSE:To prevent the suspended matter of dust and trash, etc., sucked from a sucking port from sticking to the optical system of a light source, a mirror, a glass, etc., inside a device, in an image forming device incorporating a cooling fan. CONSTITUTION:In an electrophotographic copying device, optical equipments for forming an image 6, 7a. 7b, 10, etc., the sucking port 34, an exhausting part 33, and an air duct for forcibly discharging the outside air sucked from the sucking port 34 to the exhausting port 33, are formed, and an internal cooling fan 31 capable of cooling the optical equipments arranged inside the air duct is provided. Further, the copying device has a member 46 arranged in the vicinity of the sucking port 34. a member 47 arranged in the vicinity of the exhausting port 33, and a potential generator 44 for applying potentials having different polarities to these members 46 and 47, respectively, Thus, the suspended matter of the dust and trash, etc., from the sucking port 34 is prevented from sticking to the optical equipments. |
