Photosensitive unit and process cartridge

Abstract

The utility model provides a kind of photosensitive unit and processing box, photosensitive unit includes waste powder bin shell, photosensitive drum and charging part, charging part is used to charge the surface of photosensitive drum, the surface of photosensitive drum is used to form latent electrostatic image, photosensitive drum and charging part are rotatably arranged in waste powder bin shell;Waste powder bin shell includes waste powder bin main body, first fixed part and second fixed part;First fixed part is used to fix cleaning doctor, cleaning doctor is used to clean waste powder remaining on photosensitive drum, second fixed part is used to fix support frame formed separately with waste powder bin shell, support frame is used to support waste powder cleaning part contacted with charging part, waste powder cleaning part is used to clean waste powder remaining on charging part;The cleaning doctor and support frame are not simultaneously mounted to waste powder bin main body, and the production cost of processing box can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of electronic imaging device technology, and in particular to a processing box. Background Technology

[0002] A processing cartridge is a consumable that can be detachably installed in an electrophotographic imaging device (hereinafter referred to as "imaging device"). The processing cartridge includes a housing and a photosensitive drum that is rotatably installed on the housing. The housing has a waste toner hopper for holding waste toner, and the photosensitive drum is used to form an electrostatic latent image on its surface.

[0003] After the imaging process is complete, waste toner typically remains on the surface of the photosensitive drum. Traditional waste toner disposal methods mainly rely on a cleaning scraper, which is installed at the waste toner hopper inlet to remove waste toner from the photosensitive drum surface. To ensure sealing performance, existing technologies require multiple sealing components, such as a sponge that uses its own elasticity to seal around the cleaning scraper, resulting in high production costs. Utility Model Content

[0004] This utility model provides a processing box that reduces the production cost of the processing box while cleaning up the waste toner from the photosensitive drum. The specific solution is as follows:

[0005] The photosensitive unit includes a waste toner hopper housing, a photosensitive drum, and a charging component. The charging component charges the surface of the photosensitive drum, which is used to form an electrostatic latent image. Both the photosensitive drum and the charging component are rotatably mounted in the waste toner hopper housing. The waste toner hopper housing includes a waste toner hopper body, a first fixing part, and a second fixing part. The first fixing part is used to fix a cleaning scraper, which is used to clean waste toner residue on the photosensitive drum. The second fixing part is used to fix a support frame that is separately formed from the waste toner hopper housing. The support frame is used to support a waste toner cleaning component that is in contact with the charging component. The waste toner cleaning component is used to clean waste toner residue on the charging component. The cleaning scraper and the support frame are not simultaneously installed to the waste toner hopper body.

[0006] In some embodiments, both the first fixing part and the second fixing part are connected to the main body of the waste powder bin, and the top of the second fixing part does not exceed the first fixing part in the vertical direction.

[0007] In some embodiments, when viewed along a direction intersecting the vertical direction, the support frame, waste powder cleaning component, and charging component are arranged in a top-to-bottom pattern.

[0008] In some embodiments, the support frame is detachably installed into the waste powder hopper housing, and the support frame and the second fixing part are fixedly connected by at least one of the following methods: shaft hole engagement, snap-fit ​​structure, and magnetic connection.

[0009] In some embodiments, the second fixing part includes a support column protruding downward from the waste powder hopper body in the vertical direction, and the support frame is provided with support holes corresponding to the support column.

[0010] In some embodiments, the second fixing part further includes at least one reinforcing plate, which is connected to the support column in the radial direction of the support column.

[0011] In some embodiments, the second fixing part is provided with a support hole, and the support frame is provided with a support column that protrudes in the lateral direction and corresponds to the support hole.

[0012] In some embodiments, a plurality of second fixing parts are provided, and the plurality of second fixing parts are mirror-arranged relative to the longitudinal center of the waste powder hopper body.

[0013] In some embodiments, two of the plurality of second fixing parts are located on the longitudinal sides of the waste powder body, and at least two second fixing parts are arranged near the longitudinal center of the waste powder silo body.

[0014] A processing cartridge, detachably mounted to an imaging device, is characterized by comprising a developing unit and a photosensitive unit as described above, the photosensitive unit and the developing unit being combined with each other; the developing unit includes a developing housing for containing unused toner and a developing roller rotatably disposed in the developing housing, the developing roller being used to supply toner to a photosensitive drum to develop an electrostatic latent image on the surface of the photosensitive drum. Attached Figure Description

[0015] Figure 1 This is a perspective view of the processing box involved in this utility model.

[0016] Figure 2 This is a perspective view of the processing cartridge hidden behind the developing housing, which is related to this utility model.

[0017] Figure 3 This utility model relates to a processing box edge Figure 1 A sectional view of section AA.

[0018] Figure 4 This is a perspective view of the waste powder silo shell involved in this utility model.

[0019] Figure 5 This is an exploded view of the processing box involved in this utility model, after the support frame, waste powder cleaning component, charging component and waste powder bin body are separated.

[0020] Figure 6 This utility model relates to a waste powder silo shell along... Figure 4 A sectional view of section AA. Detailed Implementation

[0021] Figure 1This is a perspective view of the processing box involved in this utility model; Figure 2 This is a perspective view of the processing cartridge hidden behind the developing housing, which is related to this utility model. Figure 3 This utility model relates to a processing box edge Figure 1 A sectional view taken at section AA. Figure 4 This is a perspective view of the waste powder silo shell involved in this utility model; Figure 5 This is an exploded view of the processing box involved in this utility model after the support frame, waste powder cleaning component, charging component and waste powder bin body are separated; Figure 6 This utility model relates to a waste powder silo shell along... Figure 4 A sectional view of section AA.

[0022] The processing cartridge C can be detachably installed into an imaging device (not shown), such as... Figure 1 As shown, the processing box C includes a photosensitive unit 10 and a developing unit 20 that are coupled together. The photosensitive unit 10 includes a waste toner hopper housing 6, a photosensitive drum 11, and a charging component 12. The charging component 12 is used to charge the surface of the photosensitive drum 11, and the surface of the photosensitive drum 11 is used to form an electrostatic latent image. Both the photosensitive drum 11 and the charging component 12 are rotatably disposed in the waste toner hopper housing 6. The photosensitive unit 10 is also provided with a reinforcing rib 60 for strengthening the toner hopper housing 6 and a waste toner hopper 61 for containing waste toner. The reinforcing rib 60 protrudes downward from the waste toner hopper housing 6 in the vertical direction. Viewed along the direction intersecting the front and rear directions, the reinforcing rib 60 and the waste toner hopper 61 are located on the front and rear sides of the waste toner hopper housing 6, respectively. The developing unit 20 includes a developing housing 21 for containing unused toner and a developing roller 23 rotatably disposed in the developing housing 21. The developing roller 23 is used to supply toner to the photosensitive drum 11 to develop the electrostatic latent image on the surface of the photosensitive drum 11. The photosensitive drum 11 rotates around a first rotation axis L1, and the developing roller 23 rotates around a second rotation axis L2. The rotation of the first rotation axis L1 and the second rotation axis L2 are parallel to each other.

[0023] The processing box C also includes a drive mechanism 4, which includes a photosensitive drum gear 41 and a developing roller gear 43 that mesh with each other. The photosensitive drum gear 41 is located at the longitudinal end of the photosensitive drum 11 and is used to receive driving force from the imaging device and drive the photosensitive drum 11 to rotate. The developing roller gear 43 is located at the longitudinal end of the developing roller 23 and is used to drive the developing roller 23 to rotate. The photosensitive drum 11 is in contact with the charging component 12. When the photosensitive drum 11 is driven to rotate by the photosensitive drum gear 41, the charging component 12 is driven to rotate by friction with the photosensitive drum 11. During the rotation of the charging component 12, the charging component 12 charges the surface of the photosensitive drum 11.

[0024] The processing cartridge C also includes a handle 5, which allows the user to install and remove the processing cartridge C. The handle 5 can be mounted on the photosensitive unit 10 or the developing unit 20. For ease of description, the direction parallel to the first rotation axis L1 is defined as the longitudinal direction / left-right direction. The processing cartridge C also has a transverse direction / front-back direction intersecting the longitudinal direction, and a vertical direction intersecting both the longitudinal and front-back directions, such as... Figure 1 As shown, the waste toner container housing 6 is located above the developing housing 21, and the waste toner container 61 is also located above the photosensitive drum 11. In the front-back direction, the photosensitive drum 11 and the handle 5 are located on both sides of the housing 2, and the photosensitive drum 11 is located in front of the handle 5. Preferably, the left-right direction, the front-back direction and the up-down direction are orthogonal.

[0025] After the imaging process is completed, waste powder will remain on the photosensitive drum 11. Simultaneously, because the charging component 12 is in contact with the photosensitive drum 11, the waste powder may adhere to the surface of the charging component 12. Figure 4 As shown, the waste toner container 61 includes a waste toner container body 62, a charging component bracket 63, and a first fixing part 64. The charging component bracket 63 supports the charging component 12, and the first fixing part 64 supports a cleaning scraper (not shown). The cleaning scraper is used to clean the waste toner residue on the photosensitive drum 11. The first fixing part 64 is provided with screw holes 64a, and the cleaning scraper is fixed to the first fixing part 64 by screws. The charging component bracket 63 is connected to the waste toner container body 62. Two charging component brackets 63 are provided and are located at the longitudinal ends of the waste toner container body 62 respectively. When viewed along the direction intersecting with the vertical direction, the first fixing part 64 protrudes downward from the waste toner container 61 in the vertical direction and is close to the charging component bracket 63. Two first fixing parts 64 are provided and are located between the two charging component brackets 63.

[0026] Furthermore, the waste powder bin 61 also includes a waste powder cleaning component 65, a support frame 66, and a second fixing part 67 for positioning and installing the support frame 66. The support frame 66 is detachably installed in the waste powder bin 61. Both the waste powder cleaning component 65 and the support frame 66 extend along the longitudinal direction of the processing box C. The waste powder cleaning component 65 contacts the charging component 12. The waste powder cleaning component 65 is used to clean the waste powder transferred from the photosensitive drum 11 to the charging component 12. Preferably, the waste powder cleaning component 65 is a sponge. The support frame 66 is separately formed from the waste powder bin shell 6. The cleaning scraper and the support frame 66 are not installed on the waste powder bin body 62 at the same time. The support frame 66 is used to support the waste powder cleaning component 65. When viewed along the direction intersecting with the vertical direction, the support frame 66, the waste powder cleaning component 65, and the charging component 33 are arranged in a top-to-bottom trend.

[0027] like Figure 5As shown, the second fixing part 67 is fixedly connected to the support frame 66. For example, the support frame 66 and the second fixing part 67 are fixedly connected through a shaft hole. Alternatively, the two can adopt a snap-fit ​​structure or magnetic connection as alternative fixing methods. The second fixing part 67 includes a support column 672 protruding downward from the waste powder hopper body 62 in the vertical direction. The support frame 66 is provided with a support hole 66a corresponding to the support column 672. Both the first fixing part 64 and the second fixing part 67 are connected to the waste powder hopper body 62. At least two second fixing parts 67 are provided, and multiple second fixing parts 67 are located close to the center of the waste powder hopper body. Specifically, multiple second fixing parts 67 are located between two first fixing parts 64. When viewed along the direction intersecting with the left and right directions, two of the multiple second fixing parts are located on the longitudinal sides of the waste powder body, and at least two second fixing parts are located close to the longitudinal center of the waste powder hopper body.

[0028] The second fixing part 67 also includes at least one reinforcing plate 671, which is used to strengthen the support column 672 and prevent the support column 672 from breaking. The reinforcing plate 671 is connected to the support column 672 in the radial direction of the support column 672. There is no restriction on its arrangement. Preferably, two reinforcing plates 671 are provided, and the two reinforcing plates 671 are arranged from front to back. The support column 671 is located between the two reinforcing plates 671, so that the reinforcing plates 671 provide more stable support for the support column 672. In other embodiments, the number of reinforcing plates can be more than two.

[0029] Viewed vertically, the top of the second fixing part 67 does not exceed the first fixing part 64, and the size of the support frame 66 does not exceed the shortest distance between the two first fixing parts 64 in the left-right direction. Specifically, the top of the second fixing part 67 does not exceed the surface of the first fixing part 64 used to support the cleaning scraper, so as to realize the universality of the waste powder container body 62. When the cleaning scraper needs to be installed in the photosensitive unit 10, the second fixing part 67 will not hinder the installation of the cleaning scraper. When the cleaning scraper does not need to be installed in the photosensitive unit 10, the first fixing part 64 will not hinder the installation of the support frame 66.

[0030] [Other Notes]

[0031] In some embodiments, the second fixing part 67 is provided with a support hole, and the support frame 66 is provided with a support column that protrudes in the lateral direction and corresponds to the support hole, as long as the second fixing part 67 and the support frame 66 can be fixedly installed.

[0032] In some embodiments, the processing box C is further provided with a sealing sheet for covering at least a portion of the waste powder cleaning component 65, thereby enhancing the sealing performance of the waste powder hopper 61.

[0033] [Beneficial Effects]

[0034] 1. When viewed along the front-back direction, the plurality of second fixing parts 67 are arranged in a non-equidistant and linear manner. Specifically, two of the plurality of second fixing parts 67 are located on both sides of the waste powder bin body 62 and are respectively set close to the first fixing part 64. The other second fixing parts 67 are close to the middle of the longitudinal direction of the waste powder bin body 62. The plurality of second fixing parts 67 form a left-right symmetry. This arrangement can optimize the force distribution.

[0035] 2. The processing box C is provided with a first fixing part 64 and a second fixing part 67. When it is necessary to produce a waste powder hopper shell 6 with a cleaning scraper, the waste powder hopper shell 6 is not equipped with a support frame 66. The user installs the cleaning scraper to the first fixing part 64. At the same time, sealing elements such as sponge and felt are arranged around the waste powder hopper 61, and the sealing is achieved by utilizing the elasticity of the sealing elements themselves. A part of the sealing element is located below the cleaning scraper. Specifically, the waste powder hopper body 62 is provided with a longitudinal sealing element mounting part 62c and a transverse sealing element mounting part 62d. Both the longitudinal sealing mounting part 62c and the transverse sealing mounting part 62d are used to support the sealing element, thereby preventing waste powder leakage. When it is necessary to produce a waste powder hopper housing 6 without a cleaning scraper, the user can directly install the support frame 66 onto the second fixing part 67, and then install the waste powder cleaning part 65 onto the support frame 66. This structure can be flexibly applied to various models without the need for additional molds for the waste powder hopper housing, thus reducing mold costs. For the factory, this simplifies the production process, and for the warehouse, it reduces storage management costs and improves management efficiency.

[0036] 3. When it is necessary to produce a waste powder hopper shell 6 without a cleaning scraper, the waste powder hopper shell 6 does not need to be equipped with sponge, felt, or sealing sheet, which saves materials and reduces the production cost of the treatment box C.

Claims

1. A photosensitive unit, comprising a waste toner hopper housing, a photosensitive drum, and a charging component, wherein the charging component charges the surface of the photosensitive drum, the surface of the photosensitive drum is used to form an electrostatic latent image, and both the photosensitive drum and the charging component are rotatably disposed within the waste toner hopper housing; characterized in that, The waste powder silo shell includes a waste powder silo body, a first fixing part, and a second fixing part; The first fixing part is used to fix the cleaning scraper, which is used to clean the waste powder remaining on the photosensitive drum. The second fixing part is used to fix the support frame formed separately from the waste powder container housing, which is used to support the waste powder cleaning component that is in contact with the charging component, and the waste powder cleaning component is used to clean the waste powder remaining on the charging component. The cleaning scraper and the support frame are not installed on the main body of the waste powder hopper at the same time.

2. The photosensitive unit according to claim 1, characterized in that, Both the first and second fixing parts are connected to the main body of the waste powder hopper, and along the vertical direction, the top of the second fixing part does not exceed the first fixing part.

3. The photosensitive unit according to claim 1, characterized in that, When viewed along the direction intersecting the vertical direction, the support frame, waste powder cleaning components, and charging components are arranged in a top-to-bottom pattern.

4. The photosensitive unit according to claim 3, characterized in that, The support frame is detachably installed into the waste powder hopper housing. The support frame and the second fixing part are fixedly connected by at least one of the following methods: shaft hole engagement, snap-fit ​​structure, and magnetic connection.

5. The photosensitive unit according to claim 4, characterized in that, The second fixing part includes a support column protruding downward from the main body of the waste powder silo in the vertical direction, and the support frame is provided with support holes corresponding to the support column.

6. The photosensitive unit according to claim 5, characterized in that, The second fixing part also includes at least one reinforcing plate, which is connected to the support column in the radial direction of the support column.

7. The photosensitive unit according to claim 4, characterized in that, The second fixing part is provided with a support hole, and the support frame is provided with a support column that protrudes in the lateral direction and corresponds to the support hole.

8. The photosensitive unit according to claim 2, characterized in that, Multiple second fixing parts are provided, and the multiple second fixing parts are arranged in a mirror image relative to the longitudinal center of the waste powder silo body.

9. The photosensitive unit according to claim 2, characterized in that, Two of the plurality of second fixing parts are located on the longitudinal sides of the waste powder body, and at least two second fixing parts are located near the longitudinal center of the waste powder silo body.

10. A processing box, detachably mounted to an imaging device, characterized in that, The device includes a developing unit and a photosensitive unit as described in any one of claims 1 to 9, wherein the photosensitive unit and the developing unit are combined with each other; the developing unit includes a developing housing for containing unused toner and a developing roller rotatably disposed in the developing housing, the developing roller being used to supply toner to the photosensitive drum to develop the electrostatic latent image on the surface of the photosensitive drum.

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