JPH06102800A - Image forming device - Google Patents

Abstract

PURPOSE:To enhance the efficiency of removing a foreign matter such as toner, etc., from an electrostatic charging member and an image carrier and the efficiency of the post treatment for the removed foreign matter without making a device main body complicated and large in size by arranging a cleaning member in contact with the electrostatic charging member also. CONSTITUTION:The surface of the image carrier 1 after transfer is cleaned by a cleaning brush 7 which is rotated in a direction shown by an arrow A, the same as the image carrier 1. And the cleaning brush 7 is in contact with an electrostatic charging roller 2, the toner and paper power remaining on the image carrier 1 after cleaning is performed, and the matter sticking on the roller after suspending as a foreign matter such as the toner, etc., in the device are cleaned by the cleaning brush 7 so as to removed. Furthermore, the foreign matter removed by the cleaning brush 7 is scraped into a tank for discarded toner 12 by a flicker bar 13 so as to be recovered. Thus, the foreign matter removed from the electrostatic charging roller 2 is prevented from sticking to the image carrier 7 and the electrostatic charging roller 2 again, so that the tank for discarded toner is not necessitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic image forming apparatus, and more particularly to an image forming apparatus for effectively removing foreign matter such as toner adhering to a charging member.

[0002]

2. Description of the Related Art Heretofore, in an electrophotographic image forming apparatus, a photoreceptor serving as an image carrier has been charged by a corona discharge method. However, this corona discharge method requires a power supply with a high voltage and a large current capacity, so that it is difficult to save space and reduce cost. Further, since ozone is generated, deterioration of the photoreceptor and adverse effects on the human body are caused. I have been concerned. Therefore, in order to solve these problems, in recent years, a contact charging type image forming apparatus has been developed in which a charging member to which a voltage is applied is brought into contact with the surface of the photoconductor to charge the photoconductor. However, in this contact charging method, since the charging member is pressed against the photoconductor with a certain pressure or more, foreign matter such as toner and paper dust remaining on the photoconductor after cleaning the photoconductor is the charging member. Adhered to the surface and caused a charging failure. To solve these problems, JOP2-27258, JOP3-017
In 79, there is proposed an image forming apparatus having a charging member cleaning member 14 for cleaning the charging member 2 provided in contact with the photoconductor 1 as shown in FIG.

[0003]

However, in the above-mentioned conventional image forming apparatus, a foreign matter collecting container 15 for collecting foreign matter such as toner removed from the charging member 2 by the charging member cleaning member 14 is separately required. As a result, the image forming apparatus becomes complicated and large in size. Further, if the foreign matter removed from the charging member 2 reattaches to the photoconductor 1 or the charging member 2, it may cause uneven charging. However, if the foreign matter collecting container 15 is not provided, the reattachment is prevented for the charging member. Cleaning member 14
There was a problem that the material or composition of the above had to be limited. Therefore, the present invention solves the above-mentioned conventional problems, removes foreign matter such as toner from the charging member and the image carrier, and post-processes the removed foreign matter without complicating and increasing the size of the apparatus main body. It is an object of the present invention to provide an image forming apparatus having a low cost and a simple structure, which can perform the above-mentioned operation more efficiently.

[0004]

According to a first aspect of the present invention, there is provided an image carrier for forming an electrostatic latent image, and a charging member which is charged while being in contact with the image carrier. And a cleaning member for cleaning the image carrier, the cleaning member is arranged in contact with the charging member. According to a second aspect of the present invention, the image carrier includes an image carrier for forming an electrostatic latent image, a charging member that is charged in contact with the image carrier, and a cleaning member for cleaning the image carrier. In the image forming apparatus, the cleaning member is a cleaning blade, and the tip of the cleaning blade is a contact portion with the image carrier, and the abdomen of the cleaning blade is a contact portion with the charging member. A charging member and a cleaning blade are arranged. Further, in claim 3, when the direction parallel to the axial direction of the image bearing member is the width direction and the direction orthogonal to this width direction is the length direction, the cleaning blade has this length. In the depth direction, a shape having a slight length from the contact portion with the charging member in the direction opposite to the tip end portion is formed.

According to a fourth aspect of the present invention, an image carrier for forming an electrostatic latent image, a charging member that is charged in contact with the image carrier, and a cleaning member for cleaning the image carrier. In the image forming apparatus including the above, the contacting / separating unit that allows the cleaning member to contact / separate with respect to both the image carrier and the charging member is provided.

Further, in claim 5 (or 6), a rotation detection means (or a sheet number detection means for detecting the number of copies) of the image carrier and a rotation state detection means for detecting the rotation state and the stationary state of the image carrier. And a contact / separation control means for controlling the drive of the contact / separation means based on the result.

According to a seventh aspect of the invention, in the image forming apparatus, the cleaning member is in contact with both the image carrier and the charging member, and a plurality of cleaning members are provided in the vicinity of the contact point with the charging member. A hole is provided, and further, according to claim 8 (or 9), a rotation detecting means (or a number detecting means for detecting the number of copies) of the image carrier and a cleaning member are vibrated. Vibrating means,
Vibration control means for controlling the drive of the vibration means based on the detection result of the rotation detection means.

[0008]

Therefore, in the present invention, since the cleaning member is arranged so as to contact not only the image bearing member but also the charging member, foreign matters such as toner removed from the charging member by the cleaning member are image bearing members. The foreign matter such as toner cleaned from the body and the foreign matter collected in the same foreign matter collection container and removed from the charging member do not redeposit on the image carrier or the charging member. Further, a foreign matter collecting container for the foreign matter removed from the charging member becomes unnecessary. Further, according to the second aspect, the tip of the cleaning blade is brought into direct contact with the surface of the image carrier to perform cleaning, so that the image carrier is more reliably cleaned. Since the abdomen of the cleaning blade serves as a contact portion with the charging member, the pressure is dispersed even when the contact pressure between the cleaning blade and the charging member is large, so that the charging member can be reliably cleaned without being damaged. Is done. Further, in the third aspect, in the length direction of the cleaning blade orthogonal to the width direction parallel to the axial direction of the image carrier, the length slightly longer from the contact portion with the charging member to the side opposite to the tip portion. Due to the shape having the depth, most of the foreign matter such as toner removed from the charging member is collected in the foreign matter collection container together with the foreign matter removed from the image carrier without remaining on the cleaning blade. .

Further, according to the present invention, after the image forming operation is completed, the cleaning member is brought into contact with both the image carrier and the charging member by the contacting / separating means, so that foreign matters such as toner remaining on them are removed. When the removed foreign matter is collected on the cleaning member, the cleaning member is separated from one or both of the image carrier and the charging member by the contacting / separating means to ensure the collected foreign matter (to the foreign matter collecting container). Drop it. Further, in claims 5 and 6, when the rotation detection means (or the number detection means for detecting the number of copies) detects the stationary state of the image carrier, the detection result is input to the contact / separation control means, and the contact / separation means is detected. The control unit drives the contacting / separating unit to separate the cleaning member from one or both of the image carrier and the charging member, thereby reliably dropping the foreign matter accumulated on the cleaning member (to the foreign matter collecting container). Further, in claim 7, since the cleaning member is brought into contact with both the image bearing member and the charging member, foreign matter such as toner falls on the cleaning member, but a plurality of foreign matters on the cleaning member do not accumulate. It falls from the hole (to the foreign material collection container). Further, in claims 8 and 9, since the cleaning member is brought into contact with both the image carrier and the charging member, foreign matter such as toner falls on the cleaning member, but the rotation detection means (or the number of sheets detection). Means) detects the stationary state of the image carrier,
The detection result is input to the vibration control means, and the vibration control means drives the vibration means to vibrate the cleaning member, so that the foreign matter on the cleaning member is more efficiently discharged from the plurality of holes on the cleaning member (the foreign matter. It will fall into the collection container).

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a drum-shaped organic photoconductor having a diameter of 40 mm. Around the photoconductor 1, a developing device 4, a transfer roller 5, a charging roller 2 which is a charging member to which a DC voltage is applied, a cleaning brush 7 which is a cleaning member for cleaning the surface of the photoconductor 1, and the cleaning brush 7. There is provided a cleaning device 6 including a flicker bar 13 for scraping off foreign matter such as toner attached to the toner, a waste toner tank 12 which is a foreign matter collecting container for storing the foreign matter, and the like. In this structure, the photoconductor 1 is charged by the charging roller 2 which is rotated in the direction of arrow A and a DC voltage is applied from a power source (not shown), and an electrostatic latent image is formed on the photoconductor 1 by exposure 3 by an exposure device (not shown). Is formed. The portion on which the electrostatic latent image is formed is developed by the developing device 4 and then transferred by the transfer roller 5 onto the transfer paper P fed from a paper feed portion (not shown), and then the transfer paper P is fixed by not shown. It is fixed by the device and discharged. On the other hand, the surface of the photoconductor 1 after transfer is cleaned by the cleaning brush 7 which also rotates in the direction of arrow A. Further, the cleaning brush 7 is in contact with the charging roller 2, and a foreign material such as toner or paper dust remaining on the photoconductor 1 after cleaning and toner floating in the apparatus adheres to the charging roller 2. The top deposits are removed by cleaning. Further, the foreign matter removed by the cleaning brush 7 is scraped off by the flicker bar 13 into the waste toner tank 12.
Collected here.

Next, an embodiment based on claim 2 will be described with reference to FIG. The overall configuration of this embodiment is claim 1.
This embodiment is similar to the embodiment described above, except that a cleaning blade 71 is provided instead of the cleaning brush 7. The cleaning blade 71 comes into contact with the photoconductor 1 at the tip portion 71a and comes into contact with the charging member 2 at the abdominal portion 71b to clean the respective contact portions. Foreign matter such as toner scraped off by the cleaning blade 71 is collected in the waste toner tank 12. In this configuration, when the cleaning blade 71 bends in the rotation direction of the photosensitive member 1 when the photosensitive member 1 rotates, and the contact pressure to the charging member 2 increases, the charging member 2 may be damaged (the charging member 2 is a photosensitive member). However, since it is in contact with the charging member 2 at the abdomen 71b of the blade 71, there is no risk of scratching.

Next, an embodiment based on claim 3 will be described with reference to FIG. The overall configuration of this embodiment is claim 2.
Similar to the embodiment described above, the cleaning blade 72 is in contact with the photoconductor 1 at the tip 72a and is in contact with the charging member 2 at the abdomen 72b, and cleans each. However, the cleaning blade 72 has a tip portion from the contact point of the charging member 2 in the blade length direction (the direction orthogonal to the blade width direction when the direction parallel to the axial direction of the photoconductor 1 is the blade width direction). It has a slight length d (for example, 3 mm) in the direction opposite to 72a. As a result, the foreign matter removed from the charging member 2 is collected in the waste toner tank 12 without remaining on the cleaning blade 72.

Next, an embodiment based on claim 4 will be described with reference to FIG. In the figure, reference numeral 1 is a drum-shaped organic photosensitive member having a diameter of 40 mm. Around the photoconductor 1, a developing device 4, a transfer roller 5, a charging roller 2 which is a charging member to which a DC voltage is applied, a cleaning blade 73 for cleaning the surface of the photoconductor 1, and a foreign substance collection for storing foreign substances. A cleaning device 6 including a waste toner tank 12 that is a container is provided. The cleaning blade 73 is supported by a supporting member 73a which is a contacting / separating means, and the supporting member 73a has a cutout portion 73b.
And 73c are provided. In this structure, the photoconductor 1 is charged by the charging roller 2 which is rotated in the direction of arrow A and a DC voltage is applied from a power source (not shown), and an electrostatic latent image is formed on the photoconductor 1 by exposure 3 by an exposure device (not shown). Is formed. The portion on which the electrostatic latent image is formed is developed by the developing device 4 and then transferred by the transfer roller 5 onto the transfer paper P fed from a paper feed portion (not shown), and then the transfer paper P is fixed by not shown. It is fixed by the device and discharged. At the time of image formation, the cleaning blade 73 is provided with a cutout portion 73b as shown in FIG.
Is controlled by a drive mechanism (contacting / separating means) not shown so that the toner is hung on the wall surface of the waste toner tank 12, and the photoconductor 1 and the charging roller 2 are brought into contact with each other with a predetermined pressure to remove foreign matters such as residual toner. To do. Further, as shown in FIG. 3B, by controlling the drive mechanism so that the cutout portion 73c is hooked on the wall surface of the waste toner tank 12, the cleaning blade 73 is separated from the photoconductor 1 and the charging roller 2, Foreign matter such as toner accumulated on the cleaning blade 73 is dropped into the waste toner tank 12 through the gap G created thereby.

Next, an embodiment based on claim 5 will be described with reference to FIG. In FIG. 7A, a rack gear 74a is attached to the rear end of the cleaning blade 74, and a gear 74b driven by the drive mechanism 8 meshes with the rack gear 74a. The rack gear 74a, the gear 74b, and the drive mechanism 8 (the drive mechanism 8 includes a contact / separation control means) constitute a contact / separation means. Then, a detector 9 which is a rotation detecting means for detecting the rotation and the stationary state of the photoconductor 1 is provided in the vicinity of the photoconductor 1, and the output terminal of the detector 9 is connected to the drive mechanism 8.

In this structure, when the detector 9 detects that the photoconductor 1 is stationary, the drive mechanism 8 is driven to rotate the gear 74b and the rack gear 74a. Move in the direction of arrow C. As a result, the cleaning blade 74 is separated from the photoconductor 1 and the charging roller 2, and foreign matter such as toner accumulated on the cleaning blade 74 is dropped into the waste toner tank 12 through the gap formed.

At this time, as shown in FIG. 6 (a), the charging roller 2 rotates along with the photosensitive member 1 (direction of arrow B).
When the toner is removed from the charging roller 2, the toner T removed from the charging roller 2 remains between the charging roller 2 and the cleaning blade 74. Therefore, the cleaning blade 74 is separated from both the photoconductor 1 and the charging roller 2 to remove the toner T. Drop it in the toner tank 12. Further, as shown in FIG. 3B, the charging roller 2 is in the opposite direction (arrow B ′) to the photoconductor 1.
When the toner T is removed from the charging roller 2, the toner T removed from the charging roller 2 remains between the photoconductor 1 and the cleaning blade 74. Therefore, the cleaning blade 74 is separated only from the photoconductor 1 to remove the toner T from the waste toner tank. 1
Drop to 2.

Next, an embodiment based on claim 6 will be described with reference to FIG. The construction of this embodiment is substantially the same as that of the embodiment of claim 5, except that a print counter 10 which is a sheet number detecting means for counting the number of copies is driven instead of the detector 9. It is a point connected to the mechanism 8. The operation of this configuration will be described with reference to the flowchart of FIG. First, in step 20, the print counter 10 counts the number of prints (the number of copies), and if it is, for example, "3000" or more,
Proceeding to step 22, the cleaning blade 74 is separated from both the photoconductor 1 and the charging roller 2 or the photoconductor 1 by the drive mechanism 8. On the other hand, if the number is "2000" or less, the control does not proceed. Further, in step 22, the cleaning blade 74 is moved to a predetermined position in the direction of arrow C, and the toner T on the cleaning blade 74 is dropped to the waste toner tank 12 during this time. And step 24
The cleaning blade 74 is again brought into contact with both the photoconductor 1 and the charging roller 2 with a predetermined pressure, the print counter 10 is reset to "0" in step 26, and the process returns to step 20 again to perform the above operation. Is repeated.

Next, an embodiment based on claim 7 will be described with reference to FIG. In FIG. 1A, the arrangement of the photoconductor 1, the charging roller 2, the cleaning blade 75, and the waste toner tank 12 is the same as that in the above-described embodiment, but as shown in FIG. In the case of rotating in the accompanying direction (arrow B direction), as shown in FIG.
The cleaning blade 75 has a charging roller contact portion 75.
A plurality of holes 75a penetrating the blade 75 are provided in the axial direction of the photoconductor 1 in the vicinity of b and on the side opposite to the contact part 75c for the photoconductor 1 with respect to the charging roller abutment part 75b. They are arranged in a line. In this configuration, the charging roller 2
The foreign matter such as toner removed from the toner does not collect on the side of the hole 75a but falls through the hole 75a to the waste toner tank 12, and the charging roller 2 contacting portion 75b of the cleaning blade 75 is always clean. To be kept. In addition, FIG.
As shown in (b), when the charging roller 2 rotates in the opposite direction (arrow B'direction) with respect to the photoconductor 1, the cleaning blade 76 is located near the charging roller contact portion 76b, A plurality of holes 76a penetrating the blade 76 are provided in a line in the axial direction of the photoconductor 1 on the side of the photoconductor 1 abutting part 76c with respect to the charging roller abutting part 76b.
In this structure, foreign matter such as toner removed from the charging roller 2 does not collect on the hole 76a side, and the hole 76a does not accumulate.
After passing through, the toner drops to the waste toner tank 12, and the vicinity of the charging roller 2 contact portion 76b of the cleaning blade 76 is always kept clean.

Next, an embodiment based on claim 8 will be described with reference to FIG. In the figure, when the charging roller 2 rotates in the opposite direction (direction of arrow B ′) with respect to the photoconductor 1, the photoconductor 1, the charging roller 2, and the cleaning blade 7
6. The arrangement of the waste toner tank 12 and the shape of the hole 76a provided in the cleaning blade 76 are the same as those of the embodiment of FIG. 9B, and in addition, the end of the cleaning blade 76 has a shape close to an ellipse. Then, a vibrating roller 11, which is a vibrating means having a rotating shaft, is provided at a position slightly deviated from the center. The vibrating roller 11 is rotationally driven by a drive mechanism 81 (a vibration control unit is included in the drive mechanism 81), and the drive mechanism 81 has a detector 9 for detecting the rotating and stationary state of the photoconductor 1. It is connected. In this configuration, when the detector 9 detects that the photoconductor 1 is stationary, it is input to the drive mechanism 81, and the cleaning blade 76 is slightly moved from both the photoconductor 1 and the charging roller 2 by another drive mechanism (not shown). Away from
The vibration roller 11 rotates. As a result, the cleaning blade 76 vibrates in the direction of the arrow D, and foreign matter such as toner removed from the charging roller 2 by this vibration is in the hole 7.
The waste toner tank 12 (not shown in the figure) passes through the hole 76a without accumulating on the 6a side, and the charging roller 2 contact portion 76b of the cleaning blade 76 is always kept clean. The same applies to the case where the charging roller 2 rotates in the rotation direction (the direction of arrow B) with respect to the photoconductor 1, but in this case, the cleaning blade 75 includes
As shown in (a), the photosensitive member 1 is located in the vicinity of the charging roller contact portion 75b, and is opposed to the charging roller contact portion 75b.
A hole 75a is provided on the side opposite to the contact portion 75c.

Next, an embodiment based on claim 9 will be described with reference to FIG. The construction of this embodiment is substantially the same as that of the embodiment of claim 8, except that the detector 9 is different.
Instead of the above, the print counter 10 for counting the number of copies as in the embodiment of FIG. 7 is connected to the drive mechanism 81 of the vibrating roller 11. In this configuration,
The print counter 10 counts the number of prints (the number of copies), and if the count is, for example, "3000" or more, the cleaning blade 74 is driven by another drive mechanism (not shown) to separate the photosensitive member 1 and the charging roller 2 from each other. Slightly separated from both, and vibrating roller 1 by drive mechanism 81
1 rotates. As a result, the cleaning blade 76
Vibrates in the direction of arrow D, and this vibration causes the charging roller 2 to
The foreign matter such as toner removed from the toner drops to the waste toner tank 12 (not shown in the figure) through the hole 76a without accumulating on the hole 76a side, and the charging roller 2 contact part 76b of the cleaning blade 76. The neighborhood is always kept clean. Then, the cleaning blade 76 is again brought into contact with both the photoconductor 1 and the charging roller 2 with a predetermined pressure, and then the print counter 10 is reset to "0".
The same applies to the case where the charging roller 2 rotates in the rotation direction (arrow B direction) with respect to the photoconductor 1, but the cleaning blade 75 in this case has the following structure as shown in FIG. In the vicinity of the charging roller contacting portion 75b, the contacting portion 7 for contacting the charging roller contacting portion 75b with the photoconductor 1
A hole 75a is provided on the side opposite to 5c.

[0021]

As described above, according to the first aspect, the cleaning member is arranged so as to contact not only the image carrier but also the charging member. Therefore, foreign matter such as toner removed from the charging member. Can be collected in the same waste toner tank together with foreign matter such as toner cleaned from the image carrier, and foreign matter removed from the charging member can be prevented from reattaching to the image carrier or the charging member. In addition, a waste toner tank for foreign matter removed from the charging member is not required, and space can be saved, and the foreign matter removed from the charging member can be easily processed. Further, since the cleaning member can be arranged in the waste toner tank, it is possible to achieve simplification, downsizing and cost reduction of the apparatus. Further, according to claim 2, since the cleaning member is a cleaning blade, and the tip portion of the cleaning blade serves as a contact portion with the image carrier,
The image carrier can be cleaned more reliably. Since the abdomen of the cleaning blade serves as a contact portion with the charging member, even if the contact pressure between the cleaning blade and the charging member becomes large, the charging member can be reliably cleaned without being damaged. . According to a third aspect of the present invention, the width direction is parallel to the axial direction of the image carrier of the cleaning blade, and in the length direction orthogonal to the width direction, from the contact portion with the charging member to the tip portion. Since it has a shape that has a slight length in the direction opposite to, the foreign matter such as toner removed from the charging member does not stay on the cleaning blade, but the waste toner that contains the foreign matter removed from the image carrier is stored. It is possible to prevent the foreign matters collected in the tank from reattaching to the image carrier and the charging member.

According to the present invention, the cleaning member is provided with the contacting / separating means for contacting / separating with respect to both the image carrier and the charging member. It is possible to reliably drop the remaining foreign matter into the waste toner tank, and to easily treat the foreign matter. According to claim 5 (or 6), the rotation detection means (or the number detection means for detecting the number of copies) for detecting the rotation and stationary state of the image carrier and the detection result of this rotation detection means are used. Since the contact / separation control means for controlling the contact / separation means is provided based on the above, it is possible to always keep the cleaning member free of foreign matter even if the user or the service person does not perform maintenance. Further, according to claim 7, since the cleaning member is brought into contact with both the image carrier and the charging member, and a plurality of holes are provided in the vicinity of the contact point with the charging member, the cleaning member is moved, etc. It is possible to drop foreign matter on the cleaning member into the waste toner tank through the plurality of holes and prevent foreign matter from accumulating on the cleaning member with a simple configuration without separately providing the mechanism. Further, according to claim 8 (or 9), in addition to the cleaning member having the plurality of holes, a rotation detecting means (or a sheet number detecting means for detecting the number of copies) of the image carrier is detected. means)
And a vibrating means for vibrating the cleaning member, and a vibration control means for controlling the drive of the vibrating means based on the detection result of the rotation detecting means, so that the user or the service person does not perform maintenance. With a simple configuration,
The effect is that the cleaning member can always be kept free of foreign matter.

[Brief description of drawings]

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

FIG. 2 is a schematic configuration diagram showing an image forming apparatus according to claim 2 of the present invention.

FIG. 3 is a schematic configuration diagram showing an image forming apparatus according to claim 3 of the present invention.

FIG. 4 is a schematic configuration diagram showing an image forming apparatus according to a fourth aspect of the present invention.

FIG. 5 is a schematic configuration diagram showing an image forming apparatus according to claim 5 of the present invention.

FIG. 6 is an explanatory view showing a position where foreign matter is accumulated in the embodiment of FIG.

FIG. 7 is a schematic configuration diagram showing an image forming apparatus according to claim 6 of the present invention.

8 is a flowchart showing a processing procedure in the embodiment of FIG.

FIG. 9 is a schematic configuration diagram showing an image forming apparatus according to claim 7 of the present invention.

FIG. 10 is a perspective view showing the cleaning member of the embodiment of FIG.

FIG. 11 is a perspective view showing an image forming apparatus according to claim 8 of the present invention.

FIG. 12 is a perspective view showing an image forming apparatus according to claim 9 of the present invention.

FIG. 13 is a schematic configuration diagram showing an image forming apparatus having a conventional cleaning member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image carrier 2 Charging member 9 Rotation detecting means 10 Number detecting means 11,81 Vibration means 71,72 Cleaning blades 71a, 72a Tip part 72a, 72b Abdomen part 7, 73, 74, 75, 76 Cleaning member 8, 73a, 74a , 74b Contact / separation means 75a, 76a Plural holes

Claims (9)

[Claims] 1. An image forming apparatus comprising: an image bearing member for forming an electrostatic latent image; a charging member that is charged in contact with the image bearing member; and a cleaning member for cleaning the image bearing member. In the apparatus, the cleaning member is arranged in contact with the charging member. 2. An image forming apparatus comprising: an image bearing member for forming an electrostatic latent image; a charging member that is charged while being in contact with the image bearing member; and a cleaning member for cleaning the image bearing member. In the apparatus, the cleaning member is a cleaning blade,
The image carrier, the charging member, and the cleaning blade are arranged such that the tip of the cleaning blade is in contact with the image carrier and the abdomen of the cleaning blade is in contact with the charging member. Image forming apparatus. 3. When the direction parallel to the axial direction of the image carrier of the cleaning blade is the width direction and the direction orthogonal to the width direction is the length direction, the cleaning blade is charged in the length direction with the electrostatic charge. The image forming apparatus according to claim 2, wherein the image forming apparatus has a shape having a small length from a contact portion with a member in a direction opposite to the tip end portion. 4. An image forming apparatus comprising: an image bearing member for forming an electrostatic latent image; a charging member that is charged in contact with the image bearing member; and a cleaning member for cleaning the image bearing member. The image forming apparatus according to claim 1, further comprising a contacting / separating unit that allows the cleaning member to contact and separate both the image carrier and the charging member. 5. A rotation detecting means for detecting a rotation and a stationary state of the image carrier, and a contact / separation controlling means for controlling driving of the contact / separating means based on a detection result of the rotation detecting means. The image forming apparatus according to claim 1, wherein: 6. A sheet number detection means for detecting the number of copies of the image forming apparatus, and a contact / separation control means for controlling the drive of the contact / separation means based on the detection result of the sheet number detection means. The image forming apparatus according to claim 1, wherein: 7. An image forming apparatus comprising: an image bearing member for forming an electrostatic latent image; a charging member that is charged in contact with the image bearing member; and a cleaning member for cleaning the image bearing member. In the apparatus, the cleaning member is in contact with both the image carrier and the charging member, and a plurality of holes are provided in the vicinity of a contact point with the charging member. . 8. A rotation detecting means for detecting a rotation and a stationary state of the image carrier, a vibrating means for vibrating a cleaning member, and a vibration control for controlling driving of the vibrating means based on a detection result of the rotation detecting means. The image forming apparatus according to claim 4, further comprising: 9. A number detecting means for detecting the number of copies of the image forming apparatus, a vibrating means for vibrating a cleaning member, and a vibration control for controlling driving of the vibrating means based on a detection result of the number detecting means. The image forming apparatus according to claim 4, further comprising: