Processing box

Abstract

The utility model provides a processing box which is detachably installed in an electrophotographic imaging device, the processing box comprises a developing unit, the developing unit comprises a developing frame body, a developing roller and a powder feeding roller, the developing roller and the powder feeding roller are rotatably arranged in the developing frame body, and the developing frame body is used for containing carbon powder. The developing roller is provided with a developing roller shaft and a developing layer covering the outer surface of the developing roller shaft, the powder feeding roller is provided with a powder feeding roller shaft and a powder feeding layer covering the outer surface of the powder feeding roller shaft, and the powder feeding roller is used for conveying carbon powder to the developing layer; a matching hole allowing the powder feeding roller to be mounted is formed in the developing frame body; the developing unit further comprises a driving end bracket arranged at one end of the developing frame body; the matching hole comprises a large-size part and a small-size part which are communicated with each other, the minimum size of the large-size part is larger than the diameter of the powder feeding roller, and the maximum size of the small-size part is smaller than the diameter of the powder feeding roller; the driving end bracket is used for being matched with the matching hole and supporting the powder feeding roller; according to the scheme, the powder feeding roller is smoothly arranged in the developing frame body, the service life of the powder feeding roller is prolonged, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic photographic imaging, in particular to a processing box. Background Art

[0002] A processing box is an essential component of an electronic photographic imaging device. There is currently a processing box that can be detachably installed in the electronic photographic imaging device, including a drum unit for accommodating waste developer and a developing unit for accommodating developer; the drum unit includes a drum frame and a photosensitive drum rotatably arranged in the drum frame, the developing unit includes a developing frame and a developing roller rotatably arranged in the developing frame, the developing roller is used to provide developer to the photosensitive drum, thereby developing the electrostatic latent image on the photosensitive drum; the developing unit also includes a powder feeding roller rotatably arranged in the developing frame, the powder feeding roller includes a powder feeding roller shaft and a sponge coated on the outer surface of the powder feeding roller shaft, the sponge is used to transport developer to the developing roller.

[0003] In the prior art, a matching hole allowing the powder feed roller to be installed is provided on the developing frame. In order to allow the developing roller to be installed in the developing frame through the matching hole, usually no glue is applied to one end of the powder feed roller so that a portion of the sponge can be movable and deformed relative to the powder feed roller shaft. However, during the rotation of the powder feed roller, a portion of the sponge cannot rotate synchronously with the powder feed roller shaft. Moreover, when the powder feed roller is installed in the developing frame for multiple times, the non-sticky portion will pull the sticky portion, causing the sponge originally adhered to the powder feed roller shaft to move, thereby causing powder feeding defects. Utility Model Content

[0004] The main purpose of the utility model is to provide a processing box, which can stably support a powder feeding roller, and the powder feeding roller has a long service life and low cost.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical scheme: a processing box is detachably installed in an electronic photographic imaging device, the processing box includes a developing unit, the developing unit includes a developing frame and a developing roller and a powder feeding roller rotatably arranged in the developing frame, the developing frame is used to accommodate carbon powder, the developing roller has a developing roller shaft and a developing layer coated on the outer surface of the developing roller shaft, the powder feeding roller has a powder feeding roller shaft and a powder feeding layer coated on the outer surface of the powder feeding roller shaft, the powder feeding layer contacts the developing layer and is used to transport carbon powder to the developing layer; the developing frame is provided with a matching hole allowing the powder feeding roller to be installed; the developing unit also includes a driving end bracket arranged at one end of the developing frame; the matching hole includes a large-size portion and a small-size portion that are interconnected, the minimum size of the large-size portion is larger than the diameter of the powder feeding roller, and the maximum size of the small-size portion is smaller than the diameter of the powder feeding roller; the driving end bracket is used to cooperate with the matching hole and support the powder feeding roller.

[0006] Furthermore, the small-size portion is provided with a protrusion for preventing the developing roller from moving along the rotation axis direction.

[0007] Further, in a direction intersecting the rotation axis of the developing roller, the protrusion is closer to the developing roller than the large-sized portion.

[0008] Furthermore, the driving end bracket includes a bracket body and an extending portion having a mounting portion extending from the bracket body; the powder feeding roller shaft is supported by the mounting portion.

[0009] Furthermore, the mounting portion is configured as a through hole.

[0010] Furthermore, the driving end bracket also includes a first through hole formed on the bracket body, and the powder feeding roller shaft is exposed through the first through hole.

[0011] Furthermore, a mounting cavity is formed in the extension portion and is located between the first through hole and the mounting portion. The mounting cavity is used to mount a sealing member, and the sealing member is used to prevent carbon powder in the developing frame from overflowing from the mounting portion.

[0012] Furthermore, the extension portion is provided with an avoidance groove cooperating with the protrusion.

[0013] Furthermore, the driving end bracket also has a second through hole formed on the bracket body, and the second through hole is used to support the developing roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 and Figure 2 It is a three-dimensional diagram of the processing box involved in the utility model.

[0015] Figure 3 The utility model is an exploded schematic diagram of a photosensitive drum in a processing box.

[0016] Figure 4 The utility model relates to a processing box edge Figure 2 Sectional view after cutting along the AA direction.

[0017] Figure 5 The utility model is a three-dimensional diagram of a developing unit of a processing box installed with a driving end bracket.

[0018] Figure 6 The utility model is a schematic diagram of an exploded view of a developing unit driving end bracket and a developing frame in a processing box.

[0019] Figure 7 and Figure 8 It is a stereoscopic diagram of a driving end bracket of a developing unit in a processing box involved in the utility model. DETAILED DESCRIPTION

[0020] The following further describes in detail the structure and other aspects of the processing box involved in the present invention through specific implementations and with reference to the accompanying drawings.

[0021] like Figure 1 and Figure 2 As shown, the processing box 1 in this embodiment can be detachably installed in an electronic photographic imaging device (hereinafter referred to as "imaging device"), and the processing box 1 includes a developing unit 10 for accommodating toner and a drum unit 20 for accommodating waste toner; the developing unit 10 includes a developing frame 11 and a developing roller 12 rotatably arranged in the developing frame 11, and the developing frame 11 is used to accommodate toner; the drum unit 20 includes a drum frame 21 and a photosensitive drum 22 rotatably arranged in the drum frame 21; the developing roller 12 is used to supply toner to the photosensitive drum 22, and the processing box 1 adopts a contact development method, and the developing roller 12 and the photosensitive drum 22 are always in contact with each other.

[0022] To make the following description clearer, the extension direction of the rotation axis of the developing roller 12 is defined as the first direction / left-right direction, the direction intersecting the first direction is defined as the second direction / front-back direction, the developing roller 12 and the photosensitive drum 22 are arranged along the second direction, the end where the photosensitive drum 22 is located is defined as the front side, and the end where the developing roller 12 is located is defined as the rear side.

[0023] like Figure 1 As shown, the developing unit 10 includes a developing roller gear 122 coaxially arranged with the developing roller 12; Figure 3 As shown, the photosensitive drum 22 includes a photosensitive cylinder 22a and a driving force receiving member 22b fixed at the end of the photosensitive cylinder 22a. The driving force receiving member 22b is fixedly connected to the photosensitive cylinder 22a, and is used to receive the driving force output by the imaging device, and drives the developing roller 12 to rotate by engaging with the developing roller gear 122.

[0024] like Figure 4 As shown, the developing roller 12 also includes a developing roller shaft 121 and a developing layer 123 coated on the outer surface of the developing roller shaft 121, and the developing layer 123 is used to carry carbon powder. The developing unit 10 also includes a powder feeding roller 13 rotatably arranged in the developing frame 11, and the powder feeding roller 13 includes a powder feeding roller shaft 131 and a powder feeding layer 132 coated on the outer surface of the powder feeding roller shaft 131, and the powder feeding layer 132 contacts the developing layer 123, and the powder feeding layer 132 transports carbon powder to the developing layer 123; preferably, the powder feeding layer 132 is configured as a sponge.

[0025] like Figure 5-Figure 8As shown, the developing frame 11 is also provided with a matching hole 111 for allowing the powder feeding roller 13 to be installed in the developing frame 11, and the matching hole 111 includes a large-sized portion 111a and a small-sized portion 111b which are interconnected, wherein the minimum size of the large-sized portion 111a is larger than the diameter of the powder feeding roller 13, and the maximum size of the small-sized portion 111b is smaller than the diameter of the powder feeding roller 13, thereby ensuring that the powder feeding roller 13 can be smoothly installed. Specifically, along the first direction, the entire powder feeding layer 132 is bonded to the powder feeding roller shaft 131 by glue, and there is no need to make one end of the powder feeding layer 132 and the corresponding position of the powder feeding roller shaft 131 non-sticky, resulting in that when the powder feeding roller 13 is installed in the developing frame 11 multiple times, the non-sticky portion will pull the sticky portion, causing the powder feeding layer 132 originally adhered to the powder feeding roller shaft 131 to move, thereby causing powder feeding defects.

[0026] The developing unit 10 further includes a driving end bracket 30 for supporting the developing roller 12 and the powder feeding roller 13. The driving end bracket 30 is arranged at the driving end and includes a bracket body 31 and a first through hole 32 and a second through hole 33 formed on the bracket body 31. The first through hole 32 is used to support the powder feeding roller 13, and the second through hole 33 is used to support the developing roller 12. The driving end bracket 30 further includes an extension portion 321 extending to the left from the bracket body 31. The extension portion 321 is arranged around the circumference of the first through hole 32, and a mounting portion 322 that cooperates with the powder feeding roller shaft 131 is formed on the extension portion 321. The mounting portion 322 is used to allow the powder feeding roller shaft 131 to enter ; Since the minimum size of the large-size portion 111a of the matching hole 111 is larger than the diameter of the powder feeding roller 13, after the powder feeding roller 13 is installed to the developing frame 11, the powder feeding roller shaft 131 located at the driving end is not supported by the large-size portion 111a, resulting in the part of the powder feeding roller 13 located at the driving end and the part located at the non-driving end being not on the same horizontal line. The mounting portion 322 cooperates with the powder feeding roller shaft 131, thereby supporting the part of the powder feeding roller 13 located at the driving end, and along the first direction, the powder feeding roller 13 as a whole is on the same horizontal line; the extension portion 321 cooperates with the matching hole 111, and is used to stably and accurately position the driving end bracket 30 on the developing frame 11 through the extension portion 321.

[0027] An installation cavity 323 is formed in the extension portion 321, and along the first direction, the installation cavity is located between the first through hole 32 and the installation portion 322, and the first through hole 32, the installation cavity 323 and the installation portion 322 are sequentially connected; the installation cavity 323 is used to install a seal, and the seal is used to prevent the carbon powder in the developing frame 11 from overflowing from the installation portion 323, thereby not only contaminating the developing unit 10 but also wasting the carbon powder. The seal can be set to a sealing cotton or a sealing gasket, etc.

[0028] Along the second direction, the extension portion 321 is provided with an avoidance groove 34; the developing unit 10 also includes a protrusion 112 arranged in the small-size portion 111b of the matching hole 111, and along the direction intersecting the rotation axis of the developing roller 12, the protrusion 112 is closer to the developing roller 12 than the large-size portion 111a. When the driving end bracket 30 is installed, the protrusion 112 enters the avoidance groove 34, so that the driving end bracket 30 is stably installed on the developing frame 11. At the same time, the cooperation between the protrusion 112 and the avoidance groove 34 can also prevent the driving end bracket 30 from rotating and limit the powder feeding roller 14 from moving along the first direction.

[0029] As described above, the minimum size of the large-size portion 111a provided on the developing frame 11 is larger than the diameter of the powder feeding roller 13, so that the powder feeding layer 132 of the powder feeding roller 13 can be smoothly installed in the developing frame 11 when it is completely bonded to the powder feeding roller shaft 131 by glue, thereby extending the service life of the powder feeding roller 13 and reducing the user cost.

Claims

1. A process cartridge, detachably mounted in an electronic photographic imaging device, the process cartridge comprising a developing unit, the developing unit comprising a developing frame, a developing roller and a powder feeding roller rotatably arranged in the developing frame, the developing frame being used to contain toner, the developing roller comprising a developing roller shaft and a developing layer coated on the outer surface of the developing roller shaft, the powder feeding roller comprising a powder feeding roller shaft and a powder feeding layer coated on the outer surface of the powder feeding roller shaft, the powder feeding layer being in contact with the developing layer and being used to feed toner to the developing layer; The developing frame is provided with a matching hole allowing the powder feeding roller to be installed; the developing unit also includes a driving end bracket arranged at one end of the developing frame; It is characterized in that The matching hole includes a large-sized portion and a small-sized portion which are interconnected, the minimum size of the large-sized portion is larger than the diameter of the powder feeding roller, and the maximum size of the small-sized portion is smaller than the diameter of the powder feeding roller; the drive end bracket is used to match with the matching hole and support the powder feeding roller.

2. The process cartridge according to claim 1, wherein: The small-size portion is provided with a protrusion for preventing the developing roller from moving along the rotation axis direction.

3. The process cartridge according to claim 2, wherein: In a direction intersecting the rotation axis of the developing roller, the protrusion is closer to the developing roller than the large-sized portion.

4. The process cartridge according to claim 3, wherein: The driving end bracket comprises a bracket main body and an extending portion having a mounting portion extending from the bracket main body; the powder feeding roller shaft is supported by the mounting portion.

5. The process cartridge according to claim 4, wherein: The mounting portion is configured as a through hole.

6. The process cartridge according to claim 4, wherein: The driving end bracket also includes a first through hole formed on the bracket body, and the powder feeding roller shaft is exposed through the first through hole.

7. The process cartridge according to claim 6, wherein: The extending portion is formed with a mounting cavity located between the first through hole and the mounting portion, the mounting cavity is used to mount a sealing member, and the sealing member is used to prevent carbon powder in the developing frame from overflowing from the mounting portion.

8. The process cartridge according to claim 4, wherein: The extension portion is provided with an avoidance groove matched with the protrusion.

9. The process cartridge according to claim 6, wherein: The driving end bracket also has a second through hole formed on the bracket body, and the second through hole is used to support the developing roller.

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