JPS61184570A - Static electricity recording device - Google Patents

Abstract

PURPOSE:To minimize the driving resistance of an image holding body and to postpone significantly the replacing period of a developing agent scattering preventing member by forming the surface, in which at least the developing agent scattering preventing member contacts with the image holding body, with a resin foaming body covered with a fluorine resin film. CONSTITUTION:At both sides of an aperture part facing a developing unit, a cleaning unit 7 and an image holding body 1, a developing agent scattering preventing member 8 is provided so as to contact with the surface of the image holding body. for the developing agent scattering preventing member 8, one surface of a prism-shaped substrate 8a composed of a polyurethane sponge is covered, a fluorine resin film layer 8b is provided, at the rear surface of the opposite side, a pressure sensitive adhesive 8c is provided and the member is provided by sticking to a developing unit 4 and the cleaning unit 7 by the pressure sensitive adhesive 8c. The fluorine resin film layer 8b minimizes the friction coefficient to the image holding body 1 of the developing scattering preventing member 8, minimizes the friction and for this, a poly four-ethylene fluoride film is preferably used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrostatic recording device, and more particularly, the present invention relates to an electrostatic recording device, and more particularly, an opening facing an image carrier surface of a process unit that stores developer, that is, a developing unit or a cleaning unit. The present invention relates to an electrostatic recording device in which developer scattering prevention members are provided on both sides of the image carrier and come into contact with the surface of the image carrier.

[Prior art]

In an electrostatic recording device, developer scattering prevention members made of flocked material or resin foam are not provided on both sides of the opening facing the image carrier surface of the developing unit or cleaning unit in which developer is stored. ing. The developer scattering prevention member made of flocked material does not have a perfect scattering prevention effect, and as the recording device continues to be used for a little longer, stains due to developer scattering become noticeable, and it also comes into strong contact with the image carrier surface. This has the disadvantage that the transplanted hair is more likely to fall out. On the other hand, a developer scattering prevention member made of a resin foam has an excellent scattering prevention effect, but has a large contact friction with the image carrier, which increases the resistance when driving the image carrier, and is also prone to wear. It has the disadvantage that it becomes damaged so that it needs to be replaced in a relatively short period of time.

[Purpose of the invention]

The present invention has been made in order to eliminate the drawbacks of the electrostatic recording device described above, and in particular, by eliminating the above-mentioned drawbacks of the developer scattering prevention member made of resin foam, it is possible to Reduces the occurrence of stains due to agent scattering,
Further, the present invention provides an electrostatic recording device in which the driving resistance of the image carrier is reduced, and the replacement cycle of the developer scattering prevention member can be significantly extended.

[Structure of the invention]

The present invention provides an electrostatic recording device in which a developer scattering prevention member is provided on both sides of an opening facing the image carrier surface of a process unit for storing developer, the developer scattering prevention member being in contact with the image carrier surface. The electrostatic recording device is characterized in that it is made of a resin foam whose surface that contacts an image carrier is coated with a fluororesin film, and this structure achieves the above object.

〔Example〕

The present invention will be explained below with reference to illustrated examples.

FIG. 1 is a side view of the main components of an example of an electrostatic recording device of the present invention, and FIG. 2 is a perspective view of an example of a developer scattering prevention member.

In FIG. 1, numeral 1 is charged by a charger 2, subjected to image exposure 3 on the charged surface to form an electrostatic image, developed into a toner image by a developing unit 4, and transferred to a transfer device. 5, the recording paper with the transferred toner image is separated by a separator 6, and the residual toner after the transfer is removed by a cleaning unit 7. unit 4
Developer scatter prevention members 8 as shown in FIG. 2 are provided on both sides of the openings of the cleaning unit 7 facing the image carrier 1 so as to be in contact with the surface of the image carrier 1.

The developer scattering prevention member 8 shown in FIG. 2 has a fluororesin film layer 8b provided on one side of a prismatic base 8a made of Moltoprene, that is, a polyurethane substrate.
A pressure-sensitive adhesive layer 8C is provided on the back surface on the opposite side thereof, and is attached to the developing unit 4 and the cleaning unit 7 by the pressure-sensitive adhesive layer 8C.

Note that the fluororesin film layer 8b reduces the coefficient of friction of the developer scattering prevention member 8 with respect to the image carrier 1, and
Since K is something that reduces wear, polytetrafluoroethylene film is preferably used.

Further, although a normal film is used as the film, the film may be a foam film.

〔Effect of the invention〕

In the electrostatic recording device of the present invention, by using the developer scattering prevention member as described above in the developing unit and the cleaning unit, a fluororesin film with a small coefficient of friction comes into contact with the surface of the image carrier. Therefore, the resistance given to the rotation of the image bearing member is small, the developer scattering prevention member is less likely to wear out, and the developer scattering prevention member is excellent in the effect of preventing the developer from scattering, resulting in an excellent effect of reducing the occurrence of stains due to developer scattering. .

The present invention is not limited to the above-mentioned examples, and the image carrier may Even if the surface outside the face plate that comes into contact with the unit is also covered with a fluororesin film, or if the developer scattering prevention member is attached separately using adhesive, etc., it is provided only on one side of the developing unit or cleaning unit. But that's fine.

[Brief explanation of drawings]

FIG. 1 is a side view of the main components of an example of the electrostatic recording device of the present invention, and FIG. 2 is a perspective view of an example of a developer scattering prevention member. 1... Image carrier, 4... Development unit,
7...Cleaning unit, 8...Developer scattering prevention member, 8a...Substrate, 8b...Fluororesin film layer, 8C...Pressure sensitive adhesive layer.

Claims (3)

[Claims] (1) In an electrostatic recording device in which developer scattering prevention members are provided in contact with the image carrier surface on both sides of an opening facing the image carrier surface of a process unit that stores developer, the number of the developer scattering prevention members is small. An electrostatic recording device characterized in that it is made of a resin foam whose surface that contacts an image carrier is covered with a fluororesin film. (2) The electrostatic recording apparatus according to claim 1, wherein the process unit is a developing unit. (3) The electrostatic recording device according to claim 1, wherein the process unit is a cleaning unit.