JPS6360480A - Recorder - Google Patents

Abstract

PURPOSE:To reduce 'squeak' without deteriorating the cleaning capacity of a cleaning blade by absorbing a sound generated in a photosensitive drum, by forming a specific sound absorbing layer on the inside surface of a cylindrical base can body for constituting a base body of a photosensitive drum. CONSTITUTION:A photosensitive drum 2 is provided with a cylindrical base can body 3, a photosensitive layer 4 which has been formed on the outside surface of this base ban body, and a sound absorbing layer 5 which can absorb a sound generated in the inside of the photosensitive drum 2 due to a vibration of a cleaning blade 11, by being formed on the inside surface of its base can body. The sound absorbing layer 5 is formed on the inside surface of the photosensitive drum 2 by a one liquid type paint whose main component is an acryl resin, and can absorb a sound generated in the inside of the photosensitive drum 2 due to a vibration of the cleaning blade 11 by unevenness of the surface of the sound absorbing layer 5, therefore, after all, a sound of the whole photosensitive drum 2 is reduced, and generation of 'squeak' of the blade 11 accompanied with a discomfort sense can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field This invention relates to a recording device, and in particular to reducing the sound (usually referred to as "squeak") generated on a photoreceptor drum due to the vibration of a cleaning blade. ``Relating to a recording device that can be cut.''

(B) Prior Art In conventional recording apparatuses, a latent image formed on a photosensitive drum is developed by a developing device and transferred onto recording paper. However, the toner on the photoreceptor drum is not completely transferred onto the recording paper, and a portion remains on the photoreceptor drum. Some of the toner remaining on the photoreceptor drum is cleaned by pressing a cleaning blade (made of an elastic material such as a rubber plate) onto the photoreceptor drum (for example, as disclosed in Japanese Patent Laid-Open No. 56-150782). (see official bulletin).

(c) Problems to be Solved by the Invention However, since the photoreceptor drum rotates and the cleaning blade is in elastic pressure contact with the surface of the photoreceptor drum, vibrations are likely to occur in the cleaning blade; Since the photoreceptor drum is usually constructed in a hollow shape, the photoreceptor drum resonates and generates an unpleasant resonance sound, so-called "squeal".Of course, if the pressure contact force of the cleaning blade against the photoreceptor drum surface is weakened, the resonance can be suppressed. The sound will be lower, but in this case, the cleaning ability of the cleaning blade will be reduced.

(d) Means for Solving the Problems and Their Effects This invention comprises a photoreceptor drum and a cleaning blade supported so as to come into pressure contact with the photoreceptor drum, and the photoreceptor drum is formed into a cylindrical can. It consists of a photosensitive layer formed on the outer surface of the drum, and a sound absorbing layer formed on the inner surface of the drum, which has many irregularities on its surface and can absorb sound generated inside the drum due to the irregularities. It is a recording device.

In other words, this invention absorbs the sound generated inside the photoreceptor drum by forming a specific sound-absorbing layer on the inner surface of the cylindrical can that constitutes the base of the photoreceptor drum. It is possible to reduce the overall sound of the photoreceptor drum, that is, the unpleasant "squeak" without reducing the cleaning ability.

In the present invention, the sound absorption layer is a layer that is formed on the inner surface of the cylindrical blank body of the photoreceptor drum, has many irregularities on its surface, and can absorb sound generated within the photoreceptor drum due to the irregularities. , specifically, a soft or hard synthetic resin layer with a large number of fine uneven patterns embossed or squeezed on the surface;
Preferable examples include a flocked layer.

The former embossed synthetic resin layer is, for example, a soft synthetic resin layer (e.g., a soft synthetic resin layer (for example, 0, whose main component is acrylic resin, vinyl chloride resin, polyethylene resin, etc.) at the stage of the material of the cylindrical can body of the photoreceptor drum. 02 to 0.08 M l!i) may be formed by coating and then embossed with an engraving roll to form irregularities on the surface (for example,
Pattern paints such as ``Leatherton'' and ``Leather Satin'' of ``Polinal'' manufactured by Ohashi Chemical Industry Co., Ltd.) or molded cast films formed by direct casting on patterned belts or patterned rolls, or engraved rolls immediately after rolling. Following the manufacture of calendered films, sheets and leather cloths that are embossed by
Alternatively, an embossed sheet or leather cloth formed by compressing and embossing between grain plates, or an extruded sheet formed by embossing after exiting an extruder may be attached to the inner surface of the photoreceptor drum's can body. good.

For the latter flocking layer, specifically, a sticky, slow-drying adhesive (for example, an elastomer adhesive) is applied to a synthetic resin base layer or a base fabric, and a flock (short laN, for example, length 0
．． Preferred examples include a layer that is sprayed with a layer of 5 to 6 mm) and fixed on the adhesive layer, has a finish resembling a suede surface or a felt surface, and is adhered to the inner surface of the indexing body of the photoreceptor drum.

(e) Examples The present invention will be described in detail below based on examples shown in the drawings. Note that this invention is not limited to this.

First, in FIG. 2, the recording device F includes a photosensitive drum 2,
A cleaning blade 11 and a collection box 10 that supports the cleaning blade so as to be in pressure contact with the photoreceptor drum 2 and that collects waste toner removed from the surface of the photoreceptor drum 2 by the pressure contact of the cleaning blade.
It is equipped with Note that 6 is an optical system, 7 is a developing unit,
8 is a transfer unit, 9 is a recording paper supply cassette, and 1 is a recording paper conveyance unit.

The photosensitive drum 2 includes a cylindrical can body 3, a photosensitive layer 4 formed on the outer surface of the conductive body, and a photosensitive layer 4 formed on the inner surface of the exposed body. The body drum 2 mainly consists of a sound absorbing layer 5 that can absorb sounds generated inside the body drum 2.

The sound absorbing layer 5 is formed on the inner surface of the photoreceptor drum 2 using a one-component paint whose main component is acrylic resin.

The easily formed surface irregularities of the sound absorbing layer 5 can absorb the sound generated inside the photoreceptor drum 2 due to the vibration of the cleaning blade 11, so that the overall sound of the photoreceptor drum 2 is eventually reduced. It is possible to prevent the occurrence of the unpleasant "sniff" of the blade. Of course, this effect of preventing the occurrence of "squeal" can be obtained without reducing the cleaning ability of the cleaning blade.

(F) Effects of the Invention According to this invention, the sound generated within the photoreceptor drum is absorbed, and the overall sound of the photoreceptor drum, that is, the noise that causes discomfort, is reduced without reducing the cleaning ability of the cleaning blade. can be reduced.

[Brief explanation of drawings]

FIG. 1 is an explanatory sectional view of a main part showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the basic configuration of the embodiment. 2...Photosensitive drum, 3...Cylindrical can body, 4...Photosensitive layer, 5...
・Sound absorption layer, 10...Collection box, 11...Cleaning blade. Figure 1

Claims (1)

[Claims] 1. A photoreceptor drum and a cleaning blade supported to be brought into pressure contact with the photoreceptor drum, the photoreceptor drum further comprising a cylindrical blank body and an outer surface of the blank body. A recording device comprising: a photosensitive layer; and a sound absorbing layer formed on the inner surface of the drum body, which has many irregularities on its surface, and can absorb sound generated within the drum due to the irregularities.