JPH0216370Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a cooling mechanism for cooling, for example, a photosensitive drum of an electronic copying machine.

[Technical background of the invention]

For example, in an electronic copying machine, the recording material, such as a selenium-based or CDS-based photoreceptor, is a semiconductor, so changes in temperature, especially temperature increases, cause changes in characteristics and deterioration in quality. For this reason, conventionally, a cooling mechanism has been provided to draw outside air into the machine to cool the interior, particularly the photoreceptor.

[Problems with background technology]

However, with conventional cooling mechanisms, outside air is taken into the machine and blown onto the surface of the photoreceptor, so if the outside air is contaminated with, for example, cigarette smoke, ammonia gas, carbon dioxide gas, dust, etc., the photoreceptor will absorb static electricity. These contaminants are electrostatically attracted, changing the surface properties and often causing blurring or fogging in the image. Therefore, a dust filter is installed at the outside air intake to remove these contamination sources, but there are various problems such as a decrease in sustainability due to filter clogging, a decrease in cooling effect due to pressure loss, and an increase in cost.

[Purpose of invention]

The present invention was developed based on the above circumstances, and its purpose is to provide a cooling mechanism for a recording apparatus that can effectively cool an electrostatic latent image forming drum without contaminating it. There is a particular thing.

[Summary of the idea]

The present invention is designed to cool an electrostatic latent image forming drum without bringing cooling air into contact with its outer wall surface.

[Example of idea]

An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes a housing of an electronic copying machine as a recording device, and inside this there is a pair of photosensitive drums 2 as electrostatic latent image forming drums forming an enclosing member with a document table 6 and a bottom plate 7, which will be described later. It is rotatably installed between the side frames 3 and 4 of. This photosensitive drum 2 has a photosensitive surface 5 for forming an electrostatic latent image on its outer wall surface, and this
A document table 6 provided on the top surface, a bottom plate 7 provided on the bottom surface of the housing 1, and the pair of side frames 3,
It is surrounded by 4 mag. An opening 8 at one end of the photosensitive drum 2 protrudes from the side frame 3 and faces an air intake port 10 formed on one side of the housing 1 via a blower fan 9 serving as a blower. Further, the other end opening 11 of the photoreceptor drum 2 protrudes from the side frame 4 and faces an exhaust port 12 formed on the other side of the housing 1 . Further, the gap between the photosensitive drum 2 and the side frames 3 and 4 is made small, and a shield material 13 made of foamed urethane or the like is provided in the gap. Then, the outside air taken in from the air intake port 10 by the ventilation fan 9 is ventilated into the inside of the photoreceptor drum 2 and discharged from the exhaust port 12, and the air is not vented to the photosensitive surface 5 of the photoreceptor drum 2. The ventilation mechanism 14 is configured in this manner.

According to the above configuration, since the outside air passes through the inside of the photoreceptor drum 2 and does not come into contact with the photoreceptor surface 5, the photoreceptor surface 5 of the photoreceptor drum 2 is not contaminated by the outside air. A good image can be obtained.

[Effect of idea]

As explained above, according to the present invention, the electrostatic latent image forming drum can be cooled without bringing cooling air into contact with its surface. Therefore, it is possible to effectively cool the electrostatic latent image forming drum without contaminating it, resulting in excellent effects such as obtaining good images.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a configuration diagram schematically showing the internal structure, and FIG. 2 is a partially exploded perspective view. 2... Electrostatic latent image forming drum (photosensitive drum),
3, 4...Side frame (enveloping member), 6...
Original table (enveloping member), 7... Bottom plate (enveloping member), 9
... Ventilation fan (air blowing means), 14... Ventilation mechanism.

Claims (1)

[Scope of utility model registration request] It is characterized by comprising: a surrounding member that surrounds the outer periphery of the drum for forming an electrostatic latent image except for both ends; and a blowing means that is provided opposite to an opening at one end of the drum and blows air. A cooling mechanism in a recording device.