JPH1152791A - Photoreceptor and image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent resonance between a photoreceptor drum and a cleaning blade without causing trouble such as the increase of cost and the deterioration of cleaning performance by attaching a vibration abosorbing member consisting of a specified elastic body mounted on a supporting body to the inside of the photoreceptor drum. SOLUTION: The vibration absorbing member 11 is attached to the inside of the photoreceptor drum 1. The member 11 is constituted by sticking the elastic body 12 having specified thickness and contact area with the inner surface of the drum onto the Myler(R) supporting body 13 having specified dimension in a longitudinal direction and a peripheral direction. Namely, the member 11 is attached by rounding the supporting body 13 along in a roll direction and inserting it so that the elastic body 12 may be brought into contact with the inner surface of the drum 1. Furthermore, the elastic body 12 whose rubber hardness is 10 deg. and whose foaming density is 180 kg/m<3> is used in this case. Therefore, the trouble such as the cost rising and the deterioration of the cleaning performance is not caused and the resonance between the drum 1 and the cleaning blade is effectively prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive member and an image forming apparatus, and more particularly, to a photosensitive member and an image forming apparatus in which resonance between a cleaning blade and a photosensitive drum is effectively prevented.

[0002]

2. Description of the Related Art Conventionally, in an image forming apparatus such as an electrophotographic copying machine, an electrostatic latent image formed on the surface of a photosensitive drum is developed using a developer to form a developer image. The developer image is transferred to the transfer paper, but there is a developer remaining on the surface of the photosensitive drum without being transferred. In order to remove the residual developer, a cleaning device having a cleaning blade is used. The cleaning blade usually rubs the surface of the photoconductor drum strongly on the contact surface of the photoconductor drum to remove the residual developer from the photoconductor drum.

When such an image forming apparatus is operated, there is a problem that the vibration frequency of the cleaning blade and the natural frequency of the photosensitive drum base tube coincide with each other to generate a resonance sound, thereby causing the photosensitive drum to vibrate. Occur. In order to prevent the generation of such resonance noise and the drum vibration, the drum base tube thickness, blade elasticity and linear pressure conditions are optimized, vibration-proof rubber is adhered to the inner surface of the flange, A method of inserting a corner support member or a mylar film has been adopted.

[0004]

However, if the conditions of the drum tube thickness, the blade elasticity, and the linear pressure are optimized, adverse effects such as a decrease in cleaning performance and an increase in the cost of the photosensitive member are likely to occur. Also, a sufficient effect can be obtained for preventing drum resonance noise when a rubber support is attached to the inner surface of the flange and a triangular support member or a Mylar film is inserted inside the photosensitive drum as a drum vibration insulator. Did not.

An object of the present invention is to provide a photoconductor and an image forming apparatus which effectively prevent the resonance of the vibration of the photoconductor drum and the cleaning blade under such circumstances.

[0006]

In order to solve the above-mentioned problems, the present invention (claim 1) provides a drum-shaped substrate, a photosensitive layer provided on the substrate, and a photosensitive layer of the substrate. An elastic body having a hardness of 10 degrees or less and a foaming density of 180 kg / m ³ or less provided in contact with the opposite side to the surface;
And a pressing member for pressing the elastic body against the substrate.

[0007] The present invention (claim 2) provides a drum-shaped substrate,
A photosensitive layer provided on the substrate, having a hardness of 10 degrees or less and a foaming density of 180 kg / m ³ or less provided in contact with the surface of the substrate opposite to the surface on which the photosensitive layer is provided;
A photoconductor, comprising: an elastic body having a thickness of less than 3 mm; and a pressing member for pressing the elastic body against the substrate.

[0008] The present invention (claim 3) provides a drum-shaped substrate,
A photosensitive layer provided on the substrate, having a hardness of 10 degrees or less and a foaming density of 180 kg / m ³ or less provided in contact with the surface of the substrate opposite to the surface on which the photosensitive layer is provided;
An elastic body having a thickness of less than 3 mm and a pressing member for pressing the elastic body against the substrate, wherein a contact area of the elastic body with respect to a substrate area on a side opposite to a side where the photosensitive layer is provided is provided. Provided is a photosensitive member having a ratio of 10% or more.

The present invention (claim 4) provides a drum-shaped substrate,
A photosensitive layer provided on the substrate, having a hardness of 10 degrees or less and a foaming density of 180 kg / m ³ or less provided in contact with the surface of the substrate opposite to the surface on which the photosensitive layer is provided;
An elastic body having a thickness of less than 3 mm, and a pressing member for pressing the elastic body against the substrate, wherein the elastic body has a length corresponding to the length of the drum-shaped substrate along the longitudinal direction of the drum-shaped substrate. Provided is a photosensitive member having a length of 50% or more.

[0010] The present invention (claim 5) provides a drum-shaped substrate,
A photosensitive layer provided on the substrate, and a photosensitive layer provided on the inner peripheral surface of the substrate opposite to the surface on which the photosensitive layer is provided.
An elastic body having a hardness of 0 degree or less and a foaming density of 180 kg / m ³ or less, a thickness of less than 3 mm, and pressing the elastic body against the substrate; A pressing member having a length along the longitudinal direction of at least 50% of the length of the drum-shaped substrate and having a length at least equal to the inner circumference of the drum-shaped substrate. provide.

The present invention (claim 6) provides a drum-shaped substrate,
A photosensitive layer provided on the substrate, and a photosensitive layer provided on the inner peripheral surface of the substrate opposite to the surface on which the photosensitive layer is provided.
An elastic body having a hardness of 0 degree or less and a foaming density of 180 kg / m ³ or less, a thickness of less than 3 mm, and pressing the elastic body against the substrate; A pressing member having a length of 50% or more of the length of the drum-shaped substrate along a longitudinal direction and having a length equal to or longer than the inner circumference of the drum-shaped substrate; The length of the drum-shaped substrate is 50% or more along the length of the drum-shaped substrate, and the ratio of the contact area to the inner peripheral area of the substrate is 10% or more. Provide a photoreceptor.

The present invention (claim 7) provides a cylindrical image carrier, a developing means for developing an electrostatic latent image on the cylindrical image carrier with a developer, and a method for developing the developed developer image. Transfer means for transferring onto a transfer material, cleaning means provided with a cleaning blade slidably in contact with the surface of the image carrier, and for removing a developer remaining on the image carrier after transfer, An image forming apparatus comprising a vibration absorbing member mounted in the cylindrical image carrier, wherein the vibration absorbing member is disposed on the support, and has a rubber hardness of 10 ° or less and a hardness of 180 kg. / M ³ and an elastic body made of foamed rubber having a foaming density of not more than ³ m, and the support is curved so that the elastic body is located outside and inserted into the cylindrical image carrier, and mounted. The elastic body is formed in the cylindrical shape by the repulsive force of the support. Pressed against the inner surface of the
Provided is an image forming apparatus characterized by being supported.

The present invention (claim 8) provides a cylindrical image carrier, a developing means for developing an electrostatic latent image on the cylindrical image carrier using a developer, and a method for developing the developed developer image. Transfer means for transferring onto a transfer material, cleaning means provided with a cleaning blade slidably in contact with the surface of the image carrier, and for removing a developer remaining on the image carrier after transfer, An image forming apparatus comprising a vibration absorbing member mounted in the cylindrical image carrier, wherein the vibration absorbing member is disposed on the support, and has a rubber hardness of 10 ° or less and a hardness of 180 kg. / M ³ and an elastic body made of foamed rubber having a foaming density of not more than ³ m, and the support is curved so that the elastic body is located outside and inserted into the cylindrical image carrier, and mounted. The elastic body is formed in the cylindrical shape by the repulsive force of the support. Pressed against the inner surface of the
The elastic body has a thickness of less than 3 mm, a ratio of a contact area of the elastic body to an area of an inner surface of the cylindrical image carrier is 10% or more, and a length of the elastic body is The dimension in the direction is 50% of the entire length of the cylindrical image carrier.
As described above, the image forming apparatus is characterized in that the elastic body is arranged at the axial center of the cylindrical image carrier.

According to a ninth aspect of the present invention, there is provided a cylindrical image carrier, a developing means for developing an electrostatic latent image on the cylindrical image carrier using a developer, and a developing means for developing the developed developer image. Transfer means for transferring onto a transfer material, cleaning means provided with a cleaning blade slidably in contact with the surface of the image carrier, and for removing a developer remaining on the image carrier after transfer, An image forming apparatus comprising a vibration absorbing member mounted in the cylindrical image carrier, wherein the vibration absorbing member is disposed on the support, and has a rubber hardness of 10 ° or less and a hardness of 180 kg. / M ³ and an elastic body made of foamed rubber having a foaming density of not more than ³ m, and the support is curved so that the elastic body is located outside and inserted into the cylindrical image carrier, and mounted. The elastic body is formed in the cylindrical shape by the repulsive force of the support. Pressed against the inner surface of the
Supported, the support has a thickness of 0.2 mm or less, its longitudinal dimension is 50% or more of the entire length of the cylindrical image carrier, and its circumferential dimension is Provided is an image forming apparatus, wherein the length is equal to or longer than the inner peripheral length of the cylindrical image carrier.

The image forming apparatus according to the present invention is characterized in that a vibration absorbing member is mounted in a cylindrical image carrier. This vibration absorbing member is one in which an elastic body is mounted on a support, and the support is curved by inserting the elastic body to the outside and inserted into a cylindrical image carrier. As described above, when the vibration absorbing member is mounted in the cylindrical image carrier, the elastic body is pressed against and supported by the inner surface of the cylindrical image carrier due to the repulsive force of the support.

In order for the vibration absorbing member thus constructed to effectively prevent resonance between the cylindrical image carrier and the cleaning blade, an elastic body attached to the support must be 10
It is necessary to be made of foamed rubber having a rubber hardness of not more than ° and a foaming density of not more than 180 kg / m ³ . If the rubber hardness and the foam density of the elastic body exceed the above-mentioned ranges, the adhesion between the inner surface of the cylindrical image carrier and the elastic body deteriorates, and a sufficient vibration-proof effect cannot be obtained. As a result, the resonance prevention effect is reduced, and the effect varies. As the elastic body used in the present invention, for example, foamed neoprene rubber or the like can be used. In addition, a mylar or the like can be used as the support.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a schematic configuration of an electrophotographic process unit of an image forming apparatus according to an embodiment of the present invention.

In FIG. 1, a photosensitive drum 1 (hereinafter referred to as a drum) as an image carrier is a conductive support, as is well known.
It has a photoconductive layer and an insulating layer as a basic configuration. A charging device 2 for uniformly charging the surface of the drum 1 around the drum 1 along the rotation direction indicated by the arrow α, the drum 1
A developing device 3 that develops the electrostatic latent image formed on the surface of the surface using a two-component developer composed of a toner and a carrier; a transfer device 4 that transfers a visible image developed on the drum 1 onto paper;
A pre-cleaning neutralization device 5 as a cleaning assisting function for neutralizing the toner remaining on the surface of the drum 1 after the transfer, and a drum cleaning device 6 for removing the residual toner are sequentially arranged.

A vibration absorbing member 11 is mounted inside the drum 1. As shown in FIG. 2, the vibration absorbing member 11 has an elastic body 12 having a thickness t and a contact area S with the inner surface of the drum adhered to a mylar support 13 having dimensions in the longitudinal direction X and the circumferential direction Y. It is attached. The vibration absorbing member 11 is mounted by rolling the mylar support 13 along the roll direction α, and inserting the elastic body 12 into close contact with the inner surface of the drum 1 as shown in FIG.

Next, the operation of the image forming apparatus thus configured will be described. First, the surface of the drum 1 is uniformly charged to an arbitrary charging potential by the charging device 2. Subsequently, the laser beam is oscillated from a laser oscillator (not shown) based on the image information, is modulated according to an input signal to a modulator (not shown), and is scanned by a rotating polygon mirror (polygon mirror: not shown). A laser beam 7 is applied to the surface of the drum 1 via an imaging lens (not shown). Drum 1
The surface potential of the irradiating part is reduced to about the residual potential due to light attenuation, and an electrostatic latent image is formed.

On the other hand, a constant bias voltage is applied to the developing roller 8 in the developing device 3, and when the drum 1 carrying the electrostatic latent image comes into contact with the developing roller 8, the drum 1 and the developing roller 8 Due to the potential difference therebetween, the toner adhering to the developing roller 8 by magnetic force adheres to a laser irradiation portion (residual potential portion) on the drum 1. As a result, the electrostatic latent image on the drum 1 is visualized.

Subsequently, the toner image on the drum 1 is transferred to a sheet (not shown) conveyed to the transfer device 4, and the toner image on the sheet is fixed by a fixing device (not shown). A fixing process is performed.

The residual transfer toner remaining on the surface of the drum 1 is subjected to AC static elimination by the pre-cleaning static eliminator 5, and
The drum 1 is separated from the drum 1 by the drum cleaning device 6. After cleaning, the electrostatic latent image on drum 1
The light is neutralized by the light neutralizing device 9 and then recharged by the charging device 2 to move to the next image forming process.

According to the present invention, in the image forming apparatus described above, in order to prevent generation of resonance noise between a cleaning blade (generally made of polyester urethane rubber) used as a drum cleaning means and a drum tube. A vibration absorbing member is mounted inside the drum 1.

As is well known, it is already known that the principle of the generation of the resonance sound is generated when the vibration frequency of the cleaning blade and the natural frequency of the drum tube coincide with each other, and has a temperature dependency.

Since the vibration of the cleaning blade changes depending on the frictional condition between the contact portion of the cleaning blade and the surface of the drum, when the amount of residual toner after transfer is extremely small, as in a blank paper print, the rotational torque of the drum is reduced. At the start of the start when the maximum is reached, the vibration is maximum.

On the other hand, in the case of the initial blade and the life blade, the vibration tends to deteriorate in the case of the life blade. This is because the nip width of the blade contact portion is widened due to the creep of the life blade and the rotational torque of the drum is reduced. The cause is considered to be the increase.

In an image forming apparatus having the same configuration as that of FIG. 1 except that no vibration absorbing member is attached,
When a cleaning blade made of highly elastic rubber was used at a linear pressure of 1.72 g / mm on a photosensitive drum having a drum tube thickness of 0.98 mm and a diameter of 60 mm, continuous white paper passing was performed by a life blade. Resonance was observed at restart.

As described above, in order to prevent the generation of resonance sound, conventionally, the thickness of the drum tube, the elastic modulus of the blade, and the linear pressure conditions have been optimized, and various types of vibration absorption have been incorporated in the drum tube. Measures such as placing the body were common.
Hereinafter, the respective effects and adverse effects will be described.

First, the relationship between the thickness of the drum tube and the resonance temperature margin is shown in FIG. The resonance temperature margin indicates a resonance limit temperature, and it is assumed that no resonance occurs at a temperature below the characteristic line in the graph of FIG. The actual operating temperature is
The upper limit indicates a rise in the temperature of the drum surface due to a rise in the temperature in the apparatus, which is 50 ° C. or lower in the image forming apparatus according to the present embodiment.

From the results shown in FIG. 3, the resonance temperature margin increases as the drum tube thickness increases. this is,
Because the natural frequency changed with the increase in drum mass,
It is considered that the resonance start temperature shifted to a higher temperature side.

However, the generally used shell thickness of 1.0 to 1.0
If the thickness is 2.0 mm, the vibration-proof effect is insufficient, and if the tube thickness is larger than that, the unit price of the drum is significantly increased, which is not practical.

FIG. 4 shows the relationship between the cleaning blade conditions and the resonance temperature margin. As shown in FIG. 4, it can be seen that the resonance temperature margin depends on the blade linear pressure and the blade elasticity. That is, when the blade linear pressure or the blade elasticity is low, the vibration frequency of the blade changes, so that the resonance temperature margin is expanded. However, at a linear pressure at which a sufficient effect is obtained, the cleaning performance at low temperatures deteriorates. .

Also, the low elastic blade has a resonance temperature margin expanded by about 13 ° C. as compared with the high elastic blade.
Since the rebound resilience is low and the drum contact surface is significantly worn, the cleaning performance at low temperatures is low. For this reason, it is necessary to set the linear pressure setting condition on the high linear pressure side as compared with the high elasticity blade, and as a result, the resonance sound preventing effect cannot be sufficiently obtained.

Conventionally, a rubber member (having a hardness of 65) is provided on the inner surface of the flange.
°), a triangular support member (AB
S material), Mylar film (t = 0.1m)
m) has been used. The relationship between the form of these vibration absorbers and the resonance temperature margin is shown in Table 1 below.

[0036]

[Table 1]

From Table 1 above, it can be seen that in the conventional methods, resonance sounds are generated at practical temperatures, and sufficient effects cannot be obtained. The reason will be described below. First, when a rubber member is attached to the inner surface of the flange, the vibration absorber is located at the end while the maximum position of the resonance amplitude of the drum is at the center, so that a sufficient vibration damping effect is obtained. Absent. In the method of inserting a triangular support member inside the raw tube,
Since there are three points of contact with the inner surface of the base tube, the contact area is small and the hardness is high, so that the vibration damping effect is small. Further, insertion itself is difficult, and mass productivity is poor. In the method of inserting a Mylar film (t = 0.1 mm),
Although the contact area is large, the mass of the mylar is extremely small, so that the vibration damping effect is small.

As described above, it is understood that it is difficult to prevent the resonance sound at a drum temperature of 50 ° C. or more without any adverse effect by the conventional method. In the image forming apparatus according to the present invention, as shown in FIG. 1, by mounting the vibration absorbing member 11 inside the drum 1, it is possible to effectively connect the drum and the cleaning blade without impairing other characteristics and performance. It has become possible to prevent resonance.

In the image forming apparatus according to this embodiment,
The elastic body used as the vibration absorbing member has the following features. With respect to the rubber hardness and foam density of the elastic body, if the hardness and the foam density are high, the adhesion to the inner surface of the drum tends to be deteriorated, and the effect of preventing resonance is reduced, and the effects are varied. On the other hand, a rubber hardness of 10 ° or less and a foam density of 18
When an elastic body of 0 kg / m ³ or less is used, the resonance preventing effect is favorably exhibited. Table 2 below shows the relationship between the rubber hardness and foam density of the elastic body and the adhesion to the drum inner surface.

[0040]

[Table 2]

As can be seen from Table 2, when an elastic body having a rubber hardness of 10 ° and a foam density of 180 kg / m ³ is used, excellent adhesion is exhibited.
^When it exceeds ³ , it can be seen that the adhesion deteriorates.

Next, the relationship between the size of the elastic body and the resonance temperature margin is shown in FIG. The area ratio of the elastic body represents the ratio of the elastic body contact area S to the area inside the drum. A sufficient vibration damping effect was obtained with the elastic body area ratio of 10%, but the resonance temperature margin was further increased to 40%. Continued to expand and became saturated after 40%.

Further, as described above, the arrangement and the dimension X in the longitudinal direction of the drum are excellent in the central portion where the amplitude is maximized and at 50% or more of the entire length of the drum because the vibration-proofing effect is significantly reduced at the ends as described above. Results were obtained.

As described above, as the size of the elastic body, the elastic body area ratio is 10% or more, the length in the longitudinal direction is 50% or more of the entire length of the drum, and the elastic body is arranged at the center of the drum. was gotten.

Next, the contact condition between the inner surface of the drum and the elastic body will be described. From FIG. 5, the thickness t of the elastic body is 3 m
When the area ratio is 20 m or more and the area ratio is 20% or more, the pressure applied by the mylar support cannot sufficiently adhere to the inner surface of the drum, so that the resonance temperature margin decreases and the drum rotates inside the drum to generate noise noise. The thickness is desirably less than 3 mm.

As for the thickness t, lengthwise direction X and circumferential direction Y of the mylar film used as the support, FIG. 5 shows that increasing the mylar thickness t improves the adhesion between the elastic body and the inner surface of the drum. However, the resonance temperature margin tends to increase, but if t exceeds 0.2 mm, there is no change in the anti-vibration effect, and insertion becomes difficult.

In addition, the longitudinal direction X of the drum of the Mylar film
About 50% of the entire drum length
It is preferable that the elastic body be in close contact with the drum in the circumferential direction Y at a length equal to or longer than the inner circumferential length of the drum, and the vibration-proof effect is good.

As described above, the contact condition is set as follows.
m, the support mylar thickness was 0.2 mm or less, the length of the mylar in the longitudinal direction was 50% or more of the entire length of the X drum, and the circumferential dimension was at least the inner peripheral length of the Y drum.

As described above, according to the image forming apparatus of the present embodiment, the conditions of the thickness of the drum tube, the elastic modulus of the blade, and the linear pressure can be optimized, and the drum which cannot be solved by the conventional vibration damping material can be eliminated. It has become possible to prevent the generation of resonance.

[0050]

As described above, according to the image forming apparatus of the present invention, since the vibration absorbing member made of the predetermined elastic body attached to the support is mounted in the photosensitive drum, the cost increases. It has become possible to effectively prevent resonance between the photosensitive drum and the cleaning blade without causing a problem of deterioration in cleaning performance.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration of an image forming apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a vibration absorbing member used in the image forming apparatus shown in FIG.

FIG. 3 is a characteristic diagram showing a relationship between the thickness of a drum tube and a resonance temperature margin.

FIG. 4 is a characteristic diagram showing a relationship between a cleaning blade condition and a resonance temperature margin.

FIG. 5 is a characteristic diagram showing a relationship between an area ratio of an elastic body and a resonance temperature margin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Photoreceptor drum, 2 ... Charging device 2, 3 ... Developing device, 4 ... Transfer device, 5 ... Static electricity removing device before cleaning, 6 ... Drum cleaning device, 7 ... Laser beam, 8 ... Developing roller, 9 ... Optical static electricity removing device Reference numeral 11 denotes a vibration absorbing member, 12 denotes an elastic body, and 13 denotes a mylar support.

Claims (9)

[Claims] 1. A drum-shaped substrate, a photosensitive layer provided on the substrate, and a hardness of 10 kg or less and 180 kg provided in contact with a surface of the substrate opposite to a surface provided with the photosensitive layer.
A photosensitive member, comprising: an elastic body having a foaming density of / m ³ or less; and a pressing member for pressing the elastic body against the substrate. 2. A drum-shaped substrate, a photosensitive layer provided on the substrate, and a hardness of less than 10 degrees and 180 kg provided in contact with the surface of the substrate opposite to the surface provided with the photosensitive layer.
A photoreceptor comprising: an elastic body having a foaming density of not more than / m ³ and a thickness of less than 3 mm; and a pressing member for pressing the elastic body against the substrate. 3. A hardness of less than 10 degrees and a hardness of 180 kg provided in contact with the drum-shaped substrate, the photosensitive layer provided on the substrate, and the side opposite to the surface of the substrate provided with the photosensitive layer.
An elastic body having a foam density of not more than ³ m / m ³ and a thickness of less than 3 mm, and a pressing member for pressing the elastic body against the substrate, and a base opposite to the side on which the photosensitive layer is provided A photoconductor, wherein the ratio of the contact area of the elastic body to the area is 10% or more. 4. A drum-shaped substrate, a photosensitive layer provided on the substrate, and a hardness of less than 10 degrees and 180 kg provided in contact with the surface of the substrate opposite to the surface provided with the photosensitive layer.
/ M ³ or less, having an elastic body having a foam density of less than 3 mm and a pressing member for pressing the elastic body against the substrate, wherein the elastic body extends in a longitudinal direction of the drum-shaped substrate. A length of the photosensitive member along the length of the drum-shaped substrate is 50% or more. 5. A hardness of 10 degrees or less provided in contact with a drum-shaped substrate, a photosensitive layer provided on the substrate, and an inner peripheral surface of the substrate opposite to the surface provided with the photosensitive layer. And 1
It has a foaming density of 80 kg / m ³ or less and a thickness of 3 mm.
Less than an elastic body, and pressing the elastic body against the substrate, having a thickness of 0.2 mm or less and a length of 50% or more of the length of the drum-shaped substrate along the longitudinal direction of the drum-shaped substrate. And a pressing member having a length equal to or longer than the inner circumference of the drum-shaped substrate. 6. A hardness of 10 degrees or less provided in contact with a drum-shaped substrate, a photosensitive layer provided on the substrate, and an inner peripheral surface of the substrate opposite to the surface on which the photosensitive layer is provided. And 1
It has a foaming density of 80 kg / m ³ or less and a thickness of 3 mm.
Less than an elastic body, and pressing the elastic body against the substrate, having a thickness of 0.2 mm or less and a length of 50% or more of the length of the drum-shaped substrate along the longitudinal direction of the drum-shaped substrate. And a pressing member having a length equal to or more than the inner circumference of the drum-shaped substrate, wherein the elastic body is at least 50% of the length of the drum-shaped substrate along the longitudinal direction of the drum-shaped substrate. Wherein the ratio of the contact area to the inner peripheral area of the base is 10% or more. 7. A cylindrical image carrier, developing means for developing an electrostatic latent image on the cylindrical image carrier using a developer, and transfer for transferring the developed developer image onto a transfer material Cleaning means having cleaning means for slidingly contacting the surface of the image carrier and removing a developer remaining on the image carrier after transfer; and An image forming apparatus comprising a mounted vibration absorbing member, wherein the vibration absorbing member is disposed on the support, and has a rubber hardness of 10 ° or less and a foam density of 180 kg / m ³ or less. And an elastic body made of foamed rubber having
The support is bent by bending the support so that the elastic body is located outside, and is inserted by inserting the support into the cylindrical image carrier. The elastic body is mounted on the inner surface of the cylindrical image support by a repulsive force of the support. An image forming apparatus characterized in that the image forming apparatus is pressed against and supported by the image forming apparatus. 8. A cylindrical image carrier, developing means for developing an electrostatic latent image on the cylindrical image carrier using a developer, and transfer for transferring the developed developer image onto a transfer material Cleaning means having cleaning means for slidingly contacting the surface of the image carrier and removing a developer remaining on the image carrier after transfer; and An image forming apparatus comprising a mounted vibration absorbing member, wherein the vibration absorbing member is disposed on the support, and has a rubber hardness of 10 ° or less and a foam density of 180 kg / m ³ or less. And an elastic body made of foamed rubber having
The support is bent by bending the support so that the elastic body is located outside, and is inserted by inserting the support into the cylindrical image carrier. The elastic body is mounted on the inner surface of the cylindrical image support by a repulsive force of the support. The elastic body has a thickness of less than 3 mm, and the ratio of the contact area of the elastic body to the area of the inner surface of the cylindrical image carrier is 10% or more; The longitudinal dimension of the elastic body is
The image forming apparatus is characterized in that the elastic body is 50% or more of the entire length of the cylindrical image carrier, and the elastic body is arranged at a central portion in the axial direction of the cylindrical image carrier. 9. A cylindrical image carrier, developing means for developing an electrostatic latent image on the cylindrical image carrier using a developer, and transfer for transferring the developed developer image onto a transfer material Cleaning means having cleaning means for slidingly contacting the surface of the image carrier and removing a developer remaining on the image carrier after transfer; and An image forming apparatus comprising a mounted vibration absorbing member, wherein the vibration absorbing member is disposed on the support, and has a rubber hardness of 10 ° or less and a foam density of 180 kg / m ³ or less. And an elastic body made of foamed rubber having
The support is bent by bending the support so that the elastic body is located outside, and is inserted by inserting the support into the cylindrical image carrier. The elastic body is mounted on the inner surface of the cylindrical image support by a repulsive force of the support. The support has a thickness of 0.2 mm or less, and its longitudinal dimension is 50% or more of the entire length of the cylindrical image carrier, and its circumferential dimension is The image forming apparatus is characterized in that the size is equal to or longer than the inner peripheral length of the cylindrical image carrier.