JPS6360481A - Recorder - Google Patents

Abstract

PURPOSE:To reduce a resonance sound of a photosensitive drum based on a vibration of a cleaning blade, and to reduce 'squeak' by inserting by pressure a specific buffer body into the inside of a cylindrical base can body for constituting a base body of a photosensitive drum. CONSTITUTION:A photosensitive drum 2 is mainly formed by a cylindrical aluminum base can body 3, a photosensitive layer 4 which has been formed on the outside surface of this base can body, and a buffer body 5 which is inserted by pressure into its base can body, and reduces a resonance sound of the photosensitive drum 2, caused by a vibration of a cleaning blade 11. The buffer body 5 is a cylindrical sponge, and constituted so that the outside diameter D of its free state, and the length L are Larger than the inside diameter (d) of the base can body 3 of the photosensitive drum 2, and smaller than the length l of the same base can body 3, respectively, and inserted by pressure into about the center of the base can body 3. In this way, a resonance sound of the photosensitive drum 2, based on a vibration of the cleaning blade 11 is reduced, and discomfortable 'squeak' can be prevented without deteriorating the cleaning capacity of the cleaning blade 11.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a recording device, and in particular to a recording device that can reduce the resonance sound (usually referred to as “squeal”) of a photoreceptor drum caused by the vibration of a cleaning blade. Regarding equipment.

(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 normally constructed in a hollow shape, the photoreceptor drum generates an unpleasant resonance sound, so-called "squeal".Of course, if the pressure 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 furthermore, the photoreceptor drum has a photoreceptor on its outer surface. A cylindrical can body with layers formed thereon, and a substantially cylindrical body whose outer diameter in a free state is larger than the inner diameter of the bare can body, and which is press-fitted into the conductive body and is photosensitive based on the vibration of a cleaning blade. This recording device includes a buffer body that can reduce the resonance sound of the body drum.

That is, the present invention can reduce the resonance sound of the photoreceptor drum caused by the movement of the cleaning blade by press-fitting a specific buffer into the inside of the cylindrical can that constitutes the base of the photoreceptor drum. Thereby, the overall sound of the photoreceptor drum, that is, the unpleasant "squeal" can be reduced without reducing the cleaning ability of the cleaning blade.

In this invention, a specific buffer is press-fitted inside the cylindrical cable can of the photosensitive drum. As a buffer,
A substantially cylindrical porous elastic body, cotton-like body, or paper structure,
Moreover, the outer diameter in the free state is larger than the inner diameter of the cylindrical can body.

The buffer is press-fitted (pushed) coaxially into the cylindrical body of the photoreceptor drum to reduce resonance noise of the photoreceptor drum caused by vibrations of the cleaning blade.

The porous elastic body is made of soft polyurethane resin, soft polyethylene resin, etc. with a foam density of 0.02 to 0.0.
Examples include closed or open-celled foams with a weight of 4 (l), preferably 0.025 to 0.035g4. Specific preferable examples of open-celled foams include sponges. In this case, the outer diameter of the buffer is 5 to 20 of the inner diameter of the raw can body of the body drum
It is desirable to set it to % increase.

Next, as the cotton-like material, glass wool is preferable, and 10 to 5
0KQ4 is 4 to 1 of the internal volume of the photoreceptor drum.
It is preferable to use an increase of 0%. On the other hand, preferable examples of the paper structure include a so-called one-sided corrugated board rolled up in layers, a paper honeycomb structure, and the like.

Specifically, an example of the former is one in which C liner is used for corrugated board paper and SCP (semi-chemical valve) is used for board paper.

(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. 3, 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.

As shown in FIGS. 1 and 2, the photosensitive drum 2 includes a cylindrical aluminum can body 3, a photosensitive layer 4 formed on the outer surface of the can body, and a cleaning blade 11. It mainly consists of a buffer 5 that can reduce the resonance sound of the photoreceptor drum 2 caused by the vibration of the photoreceptor drum 2.

The buffer body 5 is a cylindrical sponge whose outer diameter in its free state is larger than the inner diameter d of the raw can body 3 of the photosensitive drum 2, and whose length is equal to the length of the raw can body 3. They are each configured to be smaller than ρ, and are press-fitted approximately in the center of the raw can body 3 as shown in FIG. Specifically, [) = 62mm, d = 58m
m, L=50mm, and Q=230mm. The thickness of the aluminum can body 3 is 1 mm, and the photosensitive layer 4 includes a pigment layer of 17 μm mainly composed of an organic pigment and a synthetic resin, and a carrier transfer layer mainly composed of a synthetic resin and a 7-mer organic photoconductive compound. This is a coating layer consisting of two layers.

In this way, the resonance sound of the photosensitive drum 2 caused by the vibration of the cleaning blade 11 can be reduced, thereby preventing unpleasant "squealing" without reducing the cleaning ability of the cleaning blade 11.

Different from the above embodiments, as a shock absorber, a single-sided corrugated cardboard is wound as shown in FIG. can be used.

(f) Effects of the Invention According to the present invention, it is possible to reduce the resonance sound of the photoreceptor drum based on the imaging of the cleaning blade, thereby reducing the overall sound of the photoreceptor drum, that is, the noise of the entire photoreceptor drum without reducing the cleaning ability of the cleaning blade. It is possible to reduce the "squeal" that gives pleasure.

[Brief explanation of the drawing]

Fig. 1 is an explanatory sectional view of essential parts showing one embodiment of the present invention, Fig. 2 is an explanatory perspective view of a buffer body, Fig. 3 is an explanatory diagram of the overall configuration of the embodiment, and Figs. 4 and 5 are illustrations of other embodiments. FIG. 2 is a diagram corresponding to FIG. 2 showing an example. F... Recording device, 2... Photosensitive drum, 3... Aluminum can body, 4... Photosensitive layer, 5... buffer body,
10...Collection box, 11...Cleaning blade.

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 with a photoreceptor layer formed on its outer surface. , has a substantially cylindrical shape and has an outer diameter in a free state that is equal to or larger than the inner diameter of the raw can body, and is press-fitted into the raw can body to reduce resonance noise of the photoreceptor drum due to vibration of the cleaning blade. A recording device consisting of a buffer that can be used. 2. The recording device according to claim 1, wherein the buffer is a porous elastic body or a cotton-like body. 3. The recording device according to claim 2, wherein the buffer is a sponge. 4. The recording device according to claim 2, wherein the buffer is glass wool.