JP2002116661A - Electrophotographic photosensitive body, image forming method utilizing it, image forming device and process cartridge for image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an electrophotographic photosensitive body where a high quality image without any unevenness in the image can be obtained by decreasing oscillating noise generated in a contact electrifying method and oscillating noise of a cleaning blade. SOLUTION: In the electrophotographic photosensitive body provided with a photosensitive layer on a conductive cylindrical state supporting body with an outside diameter that is <=50 mm and provided with an oscillation suppressing member inside the cylindrical state supporting body, cylindricality of the electrophotographic photosensitive body is <=0.03 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic photosensitive member, and more particularly, to an electrophotographic photosensitive member having a vibration-suppressing member inside a cylindrical conductive support.

[0002]

2. Description of the Related Art Conventionally, as a method for charging an electrophotographic photosensitive member, a corona discharge method has been widely used, but this method has a drawback that ozone is generated. Therefore, in recent years, a contact charging method in which a charging member such as a roller is brought into contact with an electrophotographic photosensitive member to perform direct charging instead of a corona discharge method has become mainstream. The generation of ozone in the contact charging system is greatly reduced as compared with the corona discharge system.

In such a charging method of the contact charging system, an AC voltage is often superimposed in addition to a DC voltage in order to perform charging uniformly. However, when an AC voltage is superimposed, since the electrophotographic photoreceptor and the contact charging member are in contact with each other, there is a problem that an oscillating electric field formed therebetween vibrates them, thereby generating abnormal noise. Conventionally, in order to reduce the noise, the frequency of the AC voltage has been reduced. However, such means tends to cause charging unevenness, and there is a limit in increasing the speed of the electrophotographic apparatus.
Vibration noise also occurs when cleaning is performed by bringing the cleaning blade into contact with the surface of the electrophotographic photosensitive member.

As a conventional noise reduction means as described above, Japanese Unexamined Utility Model Publication No. Sho 62-127567 discloses that a member for absorbing or suppressing vibration is provided on the inner surface of a photosensitive body. In Japanese Patent Application Laid-Open No. 3-105348, a viscoelastic member is filled, and in Japanese Patent Application Laid-Open No. Hei 5-35049, a viscoelastic member is filled. A method of reducing the resonance sound with the contact charger by setting the ratio of the body weight / contact charger weight to 1.2 or more is disclosed in Japanese Patent Application Laid-Open No. 5-35166. Japanese Patent Application Laid-Open No. 5-18839 discloses a method in which an elastic member in which a lump heavier than an elastic member is dispersed is filled in the photosensitive member to contact the photosensitive member. Low resonance sound with charger How to have, also JP-A 5-333
No. 668 discloses that the ratio of the charger weight / photoconductor weight is 1.0.
The following describes a method for reducing resonance noise with a contact charger. In addition, many methods for preventing vibration noise have been proposed, such as putting a metal inside a photoconductor.

[0005]

However, although these methods are effective to some extent, the structure of the material to be filled into the photoreceptor may be complicated, or the photoreceptor may not be used depending on the filling. There are problems such as deformation and image unevenness. In addition, there is a method of fixing them using an adhesive material as a method of mounting them, but this method causes deterioration of accuracy due to distortion of the photoconductor caused by curing and shrinking of the adhesive material, dripping of the adhesive material, unusual odor, etc. There is also a problem.

The present invention reduces vibration noise generated by the above-described contact charging system and vibration noise generated when a cleaning blade is brought into contact with the surface of an electrophotographic photosensitive member to perform cleaning. It is an object of the present invention to provide an electrophotographic photoreceptor capable of obtaining an image of (1).

[0007]

Means for Solving the Problems The present inventors have studied the above problems and specified the outer diameter and cylindricity of the support of an electrophotographic photosensitive member in which a vibration suppressing member was inserted inside a cylindrical support. The present invention has been found to be able to reduce the above-described vibration noise and to provide an electrophotographic photoreceptor which can prevent the deformation of the photoreceptor due to the vibration suppressing member and the occurrence of image unevenness caused by the vibration suppression member, which have been disadvantages so far. Reached. That is, according to the present invention, first, the outer diameter is 50 m.
m or less, the electrophotographic photosensitive member having a photosensitive layer on a conductive cylindrical support having a vibration suppression member inside the cylindrical support has a cylindricity of 0.03 mm or less. An electrophotographic photosensitive member is provided. With such a configuration, silence is high,
It is possible to obtain a high-quality electrophotographic photosensitive member without image unevenness. The reason is that, when the outer diameter of the cylindrical support is not specified, as the outer diameter increases with the same thickness, the accuracy of the electrophotographic photosensitive member due to the vibration suppressing member is reduced, thereby causing image unevenness. I was As a result of studying to solve this phenomenon, it was confirmed that sufficient effects could not be obtained unless the outer diameter of the cylindrical support was 50 mm or less and the cylindricity of the electrophotographic photosensitive member was 0.03 mm or less. Was.

Secondly, there is provided an electrophotographic photosensitive member according to the first aspect, wherein the thickness of the conductive cylindrical support is 1 mm or less. Under the above conditions, the case where the thickness of the cylindrical support is 1 mm or less is very effective. When the thickness exceeds this, the improvement effect when the vibration suppressing member is inserted is small.

Thirdly, there is provided an electrophotographic photosensitive member according to the first or second aspect, wherein the thickness of the vibration suppressing member is 2 mm or more. The vibration suppressing effect is more effective as the weight of the vibration suppressing member increases, and the thickness of the vibration suppressing member is preferably 2 mm or more.

Fourthly, in the electrophotographic photoreceptor described in the first, second or third aspect, the vibration suppressing member is a resin containing 5% or more of an increasing material. Is provided. When the thickness of the vibration suppressing member is the same, the effect is greater as the weight is larger, and a resin containing 5% or more of the filler material is very effective. When the vibration suppressing member is a resin, the adhesion between the inner surface of the cylindrical support and the vibration suppressing member is enhanced.

Fifth, in the electrophotographic photosensitive member described in the fourth aspect, the vibration suppressing member has a cylindrical shape, and the outer diameter of the vibration suppressing member is larger than the inner diameter of the cylindrical support. An electrophotographic photosensitive member is provided, which is elastically deformed and inserted into a body, and is fixed to the cylindrical support without using an adhesive material. The outer diameter of the vibration suppressing member is larger than the inner diameter of the cylindrical support, and the elastically deformed and inserted member has a higher adhesion, so that the adhesive material does not need to be used for fixing the vibration suppressing member, and the adhesive material sags. It does not cause a decrease in accuracy due to distortion of the electrophotographic photoreceptor generated at the time of abnormal odor, curing of the adhesive material, and shrinkage.

Sixth, in the electrophotographic photosensitive member described in the fifth aspect, the vibration suppressing member having a thickness of a (mm) has a thermal deformation temperature of the vibration suppressing member of T (° C.) and a processing time of t (° C.). mi
n), T ± 5 (° C.), 5a ≦ t ≦ 30a (m
An electrophotographic photoreceptor characterized by being heat-treated in (in). When the vibration suppression member is inserted inside the cylindrical support and stored in a high-temperature storage environment or a high-temperature and low-temperature environment, the outer diameter of the vibration suppression member decreases, and the adhesion to the cylindrical support decreases. However, rattling may occur inside the support. However, by performing heat treatment on the vibration suppressing member in advance under the above conditions, the outer diameter can be prevented from being reduced due to internal stress, and a good adhesion state can be maintained.

Seventh, in an image forming method using an electrophotographic photoreceptor and repeating at least processes of charging, image exposure, development, transfer, cleaning and charge removal, the photoreceptor is described in the above first to sixth aspects. An image forming method characterized by any one of the electrophotographic photosensitive members is provided. The image forming process using the electrophotographic photoreceptor of the present invention can provide an image forming method which can form a high quality image with high silentness and no image unevenness.

Eighth, in an image forming apparatus including at least an electrophotographic photosensitive member, a charging unit, an image exposing unit, a developing unit, a transferring unit, a cleaning unit, and a discharging unit, the electrophotographic photosensitive member is the first photosensitive member. An image forming apparatus, which is any one of the electrophotographic photoreceptors described in any one of the first to sixth aspects, is provided. By using the electrophotographic photoreceptor of the present invention to form an image forming apparatus, an image forming apparatus that can form a high-quality image with high silence and without image unevenness can be obtained.

Ninth, a process cartridge for an image forming apparatus including at least an electrophotographic photosensitive member, wherein the electrophotographic photosensitive member is any one of the electrophotographic photosensitive members described in the first to sixth aspects above A process cartridge for an image forming apparatus is provided. The process cartridge for an image forming apparatus using the electrophotographic photoreceptor of the present invention is used to form a process cartridge for an image forming apparatus having high silence and capable of forming a high-quality image with no image unevenness. Is obtained.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The electrophotographic photoreceptor provided in the present invention has a photosensitive layer inside a cylindrical support and a vibration suppressing member 2 inserted therein as shown in FIG. Examples of the cylindrical support include metals such as aluminum, nickel, copper, iron, and zinc;
Alternatively, a cylindrical conductive support made of an alloy thereof, a conductive plastic, or the like can be used. The outer diameter of the cylindrical support is 50 mm or less, the thickness of the support is 1 mm or less, and the cylindricity of the electrophotographic photosensitive member is 0.03.
When it is less than mm, the excellent effects of the present invention can be obtained. The outer diameter of the cylindrical support is not particularly limited, but is not less than the outer diameter of the practical photoreceptor. Also, the lower the cylindricity, the better,
Usually, when the vibration suppressing member is inserted inside the drum, the cylindricity tends to deteriorate.

As the vibration suppressing member 2, a cylindrical shape or a cylindrical shape having a slit as shown in FIGS. 2 and 3 is preferable. The vibration suppressing member formed of the resin contained above and having a thickness of a (mm), when the thermal deformation temperature of the vibration suppressing member is T (° C.) and the processing time is t (min), T ± 5 ( C), preferably a resin heat-treated at 5a ≦ t ≦ 30a (min), and further, the outer diameter of the vibration suppressing member is elastically deformed to be larger than the inner diameter of the cylindrical support, and inserted. Preferably, no adhesive material is used. The upper limit of the wall thickness of the vibration suppressing member 2 is not less than R / 2 with respect to the inner diameter R of the support body, because if it is too thick, it becomes a cylinder. In addition, mica is preferable as the extending material, but metals such as iron and aluminum can also be used. The upper limit of the content of the weight-increasing material is preferably 45% or less from the viewpoint of the stability of the resin containing the material and the vibration suppressing member.
The resin used is, in addition to ABS resin, PE
T resin, POM resin, PBT resin, PC resin and the like are preferable.

Next, an image forming method and an image forming apparatus according to the present invention will be described with reference to the drawings. FIG. 4 is a conceptual diagram for explaining the image forming process and the image forming apparatus of the present invention. In FIG. 4, the electrophotographic photoreceptor 11 has a drum shape, and the vibration suppressing member described in the present invention is inserted inside the cylindrical support. Charger 1
3. As the pre-transfer charger 17, the transfer charger 20, the separation charger 21, and the pre-cleaning charger 23, known means such as a corotron, a scorotron, a solid state charger (solid state charger), and a charging roller are used.

Light sources such as the image exposure unit 15 and the neutralizing lamp 12 include a fluorescent lamp, a tungsten lamp, a halogen lamp, a mercury lamp, a sodium lamp, and a light emitting diode (LE).
D), semiconductor lasers (LD), electroluminescence (EL), and other general light-emitting materials can be used. Then, in order to irradiate only light in a desired wavelength range, various filters such as a sharp cut filter, a band pass filter, a near infrared cut filter, a dichroic filter, an interference filter, and a color temperature conversion filter can be used. Such a light source or the like irradiates the electrophotographic photosensitive member with light by providing a transfer step, a charge removal step, a cleaning step, or a pre-exposure step using light irradiation in addition to the step shown in FIG.

The toner developed on the electrophotographic photosensitive member 11 by the developing unit 16 is transferred to the transfer paper 19, but not all of the toner is transferred, and the toner remaining on the electrophotographic photosensitive member 11 is not transferred. Also occurs. Such toner is removed from the electrophotographic photosensitive member by the fur brush 24 and the cleaning brush 25. Cleaning is
The cleaning may be performed only with a cleaning brush or a cleaning blade, and a known brush is used.

When a positive (negative) charge is applied to the electrophotographic photosensitive member and image exposure is performed, a positive (negative) electrostatic latent image is formed on the surface of the electrophotographic photosensitive member. If this is developed with toner of negative (positive) polarity, a positive image can be obtained, and if it is developed with toner of positive polarity, a negative image can be obtained. A known method is applied to the developing means, and a known method is also used for the charge removing means.

The illustrated electrophotographic process is an example of an embodiment of the present invention, and other embodiments are of course possible. On the other hand, in the light irradiation step, image exposure, pre-cleaning exposure, and charge removal exposure are shown, but in addition, pre-transfer exposure, pre-exposure of image exposure and other known light irradiation steps are provided, and the electrophotographic photosensitive member is provided. Light irradiation can also be performed.

The image forming means as described above may be fixedly incorporated in a copying machine, a facsimile, or a printer, or may be incorporated in the apparatus in the form of a process cartridge. What is a process cartridge?
This is one device (part) that incorporates an electrophotographic photosensitive member and further includes a charging unit, an exposing unit, a developing unit, a transferring unit, a cleaning unit, and a discharging unit. Although there are many shapes and the like of the process cartridge, a general example is shown in FIG. The electrophotographic photosensitive member 26 has a vibration suppressing member inserted inside the cylindrical support.

[0024]

Next, the present invention will be described in more detail by way of examples. However, the present invention is not limited by the following examples. In the examples, all parts are parts by weight.

Example 1 A coating solution for forming an undercoat layer, a coating solution for a charge generation layer, and a coating solution for forming a photosensitive layer were formed on an aluminum cylindrical support having an outer diameter of 30 mm, a length of 340 mm, and a thickness of 1.5 mm. The coating solution for the charge transfer layer was sequentially applied by dip coating and dried to form a photosensitive layer on an aluminum cylindrical support. [Coating liquid for undercoat layer] Titanium oxide (TiO ₂ ) 3 parts Thermosetting resin 5 parts Methyl ethyl ketone 20 parts (undercoat layer thickness 4.5 μm) [Coating liquid for charge generation layer] The following structural formula (I) ) 10 parts of charge generating material

[0026]

Embedded image Polyvinyl butyral resin 4 parts Methyl ethyl ketone 700 parts (Charge generating layer thickness 0.2 μm) [Coating liquid for charge transfer layer] Charge transfer material represented by the following structural formula (II) 7 parts

[0027]

Embedded image Polycarbonate resin 10 parts Dichloromethane 100 parts (Charge transfer layer thickness 28 μm) A cylindrical aluminum having an outer diameter of 27 mm, a length of 200 mm and a wall thickness of 1.5 mm was inserted as a vibration suppressing member into the drum prepared as above, and a gap was formed. Then, an epoxy-based adhesive was permeated and fixed, and a flange was press-fitted to obtain an electrophotographic photosensitive member having a cylindricity of 0.03 mm. In addition, the cylindricity was measured along the longitudinal direction of the electrophotographic photosensitive member by using a roundness measuring device manufactured by Tokyo Seimitsu Co., Ltd. to determine the cylindricity. The obtained electrophotographic photosensitive member was mounted on a Ricoh NX710, and noise measurement and halftone image check were performed. As an evaluation method, a 2 × 2 dot pattern was output, and the presence or absence of image unevenness caused by cylindricity was examined. Further, a microphone was set around the NX710 in the no-floor room, and the sound power was measured. Table 1 shows the results.

Example 2 The thickness of the aluminum cylindrical support of Example 1 was 0.75 mm,
An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 1, except that the outer diameter of the vibration suppressing member was changed to 28.5 mm. Table 1 shows the results.

Example 3 In Example 2, the vibration suppressing member was changed to a cylindrical ABS resin having a thickness of 3.5 mm and having a slit, and the cylindricity was 0.02.
An electrophotographic photoreceptor was prepared and evaluated in the same manner as in Example 2 except that the thickness was 5 mm. Table 1 shows the results.

Example 4 An electrophotographic photoreceptor was prepared and evaluated in the same manner as in Example 3, except that the vibration suppressing member contained 20% by weight of mica. Table 1 shows the results.

Example 5 In Example 4, the outer diameter of the vibration suppressing member was 28.7 mm.
Example 4 except that the cylindricity was changed to 0.02 mm.
An electrophotographic photosensitive member was prepared and evaluated in the same manner as in the above. Table 1 shows the results. In the embodiment, the inner diameter of the drum is 28.5 m.
The outer diameter of the vibration suppressing member is 28.7 mm, which is larger than m, and is slit. Therefore, when the outer periphery of the vibration suppressing member is pressed with a finger, it can be elastically deformed by an amount corresponding to the slit. When released, it could be fixed inside the drum without any adhesive due to the restoring force. By inserting the vibration suppressing member by elastically deforming it in this way, workability is improved, and since no adhesive material is used for fixing, distortion generated when the adhesive material is hardened or shrunk is eliminated, further improving image quality. Was obtained, and there was no dripping of the adhesive material and no unpleasant odor.

Example 6 In Example 5, 90 ° C. for 60 minutes while maintaining the outer diameter of the cylindrical ABS resin vibration suppressing member having a thickness of 3.5 mm and having a thickness of 3.5 mm (heat deformation temperature of 90 ° C.) at 28.7 mm. Then, an electrophotographic photoreceptor was prepared and evaluated in the same manner as in Example 5 except that a vibration suppressing member cooled after the heat treatment was used.
Table 1 shows the results. When the obtained photoreceptor was repeatedly subjected to environmental storage at 60 ° C. and −40 ° C. (12 hours each) for one week, the outer diameter of the vibration suppressing member was avoided even after the environmental storage, and there was no backlash. The same effect as before environmental preservation was obtained.

Comparative Example 1 A coating liquid for an undercoat layer, a coating liquid for a charge generating layer, and a charge as in Example 1 were formed on an aluminum cylindrical support having an outer diameter of 80 mm, a length of 340 mm, and a thickness of 1.5 mm. The coating solution for the moving layer was successively applied by dip coating and dried to form a photosensitive layer on an aluminum cylindrical support. The drum has an outer diameter of 2 as a vibration suppressing member.
A cylindrical cork having a thickness of 7.0 mm, a length of 200 mm, and a thickness of 1.5 mm was inserted and flange-pressed to produce an electrophotographic photosensitive member having a cylindricity of 0.05 mm. The obtained electrophotographic photosensitive member was subjected to noise measurement and halftone image check in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 2 An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 2 except that the cylindricity was changed to 0.05 mm. Table 1 shows the results.

Reference Example 1 In Example 5, the outer diameter of the 3.5 mm-thick cylindrical ABS resin vibration suppressing member (heat deformation temperature: 90 ° C.) having a slit of 3.5 mm was kept at 70 ° C., 5 ° An electrophotographic photosensitive member was prepared and evaluated in the same manner as in Example 5, except that a heat treatment was performed for one minute, and then the cooled vibration suppressing member was used. Table 1 shows the results. When the obtained photoreceptor was subjected to high-temperature storage at 60 ° C. for one week and repeated environmental storage at 60 ° C. and −40 ° C. (each 12 hours) for one week, the outer diameter of the vibration suppressing member was reduced, and the rattle was reduced. Occurred, and the same effect as before environmental preservation was not obtained.

[0036]

[Table 1] (Note) The * mark in the row of the shape of the vibration suppression member indicates that it is cylindrical with slits.

[0037]

As described above, the invention of claim 1 has a photosensitive layer on a conductive cylindrical support having an outer diameter of 50 mm or less,
In the electrophotographic photosensitive member having a vibration suppressing member inside the cylindrical support, the cylindricity of the electrophotographic photosensitive member is 0.03.
mm or less, vibration noise can be reduced, and a high-quality electrophotographic photosensitive member without image unevenness can be obtained. That is, if the outer diameter of the cylindrical support is not more than 50 mm and the cylindricity of the electrophotographic photoreceptor is not more than 0.03 mm, the accuracy of the electrophotographic photoreceptor is reduced by the vibration suppressing member, and image unevenness occurs. Not enough effect

According to the second aspect of the present invention, since the thickness of the conductive cylindrical support is 1 mm or less, it is very effective in the above-mentioned effect. If the thickness exceeds 1 mm, the vibration suppressing member is inserted. The improvement effect at the time is small.

According to the third aspect of the present invention, since the thickness of the vibration suppressing member is 2 mm or more, a good effect can be obtained by combining the vibration suppressing effect with the weight of the vibration suppressing member.

According to the fourth aspect of the present invention, since the vibration suppressing member is a resin containing a material of 5% or more in weight, the vibration suppressing effect is very good and the adhesion between the inner surface of the cylindrical support and the vibration suppressing member is improved. Is also good.

According to a fifth aspect of the present invention, the vibration suppressing member has a cylindrical shape, and the outer diameter of the vibration suppressing member is larger than the inner diameter of the cylindrical support, and is elastically deformed and inserted into the cylindrical support. In addition, since it is fixed to the cylindrical support without using an adhesive material, the adhesion to the inner surface of the cylindrical support is increased, and it is not necessary to use the adhesive material for fixing the vibration suppressing member. There is no sacrificing odor, no hardening of the adhesive material, and no decrease in accuracy due to distortion of the electrophotographic photoreceptor generated during shrinkage.

According to a sixth aspect of the present invention, the vibration suppressing member comprises:
When the heat deformation temperature is T (° C.) and the processing time is t (min) at a wall thickness a (mm), T ± 5 (° C.), 5a ≦ t ≦ 3
Since the heat treatment is performed at 0 a (min), the outer diameter is prevented from being reduced due to the internal stress, and a good adhesion state can be maintained.

According to a seventh aspect of the present invention, there is provided an image forming method using the electrophotographic photoreceptor of the present invention. Therefore, it is possible to form a high quality image with reduced vibration noise and no image unevenness. it can.

Since the invention of claim 8 is an image forming apparatus using the electrophotographic photoreceptor of the present invention, it is possible to form a high quality image with reduced vibration noise and no image unevenness. it can.

According to a ninth aspect of the present invention, there is provided a process cartridge for an image forming apparatus using the electrophotographic photosensitive member according to the present invention, which forms a high quality image with reduced vibration noise and without image unevenness. can do.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an electrophotographic photoreceptor having a photosensitive layer on the surface of a cylindrical support and a vibration suppression member inserted therein.

FIG. 2 is a side view and a front view of a slit-shaped cylindrical vibration suppressing member.

FIG. 3 is a perspective sectional view of an electrophotographic photosensitive member in which a photosensitive layer is inserted on the surface of a cylindrical support and a cylindrical vibration suppressing member having a slit is inserted therein.

FIG. 4 is a conceptual diagram illustrating an image forming method and an image forming apparatus according to the present invention.

FIG. 5 is a schematic sectional view illustrating an example of a process cartridge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conductive cylindrical support + photosensitive layer 2 Vibration suppression member 3 Cylindrical vibration suppression member with slit (with split) 4 Slit 5 Cylindrical vibration suppression member with slit 11, 26 Photoconductor 12 Static elimination lamp 13, 27 Charger 14 Eraser 15 image exposure unit 16 developing unit 17 pre-transfer charger 18 registration roller 19 transfer paper 20 transfer charger 21 separation charger 22 separation claw 23 pre-cleaning charger 24 fur brush 25, 28 cleaning brush 29 image exposure unit 30 development roller

Claims (9)

[Claims] 1. An electrophotographic photosensitive member having a photosensitive layer on a conductive cylindrical support having an outer diameter of 50 mm or less and having a vibration suppressing member inside the cylindrical support, wherein the cylinder of the electrophotographic photosensitive member is provided. An electrophotographic photosensitive member having a degree of 0.03 mm or less. 2. The electrophotographic photosensitive member according to claim 1, wherein the thickness of the conductive cylindrical support is 1 mm or less. 3. The electrophotographic photosensitive member according to claim 1, wherein the thickness of the vibration suppressing member is 2 mm or more. 4. The electrophotographic photosensitive member according to claim 1, wherein the vibration suppressing member is a resin containing a material that increases by 5% or more. 5. The electrophotographic photosensitive member according to claim 4, wherein the vibration suppressing member has a cylindrical shape, and the outer diameter of the vibration suppressing member is larger than the inner diameter of the conductive cylindrical support. An electrophotographic photoreceptor, wherein the photoreceptor is elastically deformed and inserted into a body, and is fixed to the cylindrical support without using an adhesive material. 6. The electrophotographic photosensitive member according to claim 5, wherein the vibration suppressing member having a thickness a (mm) has a heat deformation temperature of the vibration suppressing member of T (° C.) and a processing time of t (min). An electrophotographic photosensitive member that has been heat-treated at T ± 5 (° C.) and 5a ≦ t ≦ 30a (min). 7. An image forming method using an electrophotographic photosensitive member, wherein at least charging, image exposure, development, transfer, cleaning and charge elimination processes are repeated, wherein the photosensitive member is any one of claims 1 to 6. An image forming method, which is a photographic photoreceptor. 8. At least an electrophotographic photosensitive member, charging means,
An image forming apparatus comprising an image exposing unit, a developing unit, a transferring unit, a cleaning unit, and a discharging unit, wherein the electrophotographic photosensitive member is the electrophotographic photosensitive member according to any one of claims 1 to 6. Image forming apparatus. 9. A process cartridge for an image forming apparatus comprising at least an electrophotographic photosensitive member, wherein the electrophotographic photosensitive member is any one of the electrophotographic photosensitive members according to claim 1. And process cartridge.