Processing box

Abstract

The utility model provides a processing box which comprises a developing unit, a photosensitive unit, a protective cover and a bolt, and the developing unit comprises a developing bin for accommodating a developing agent and a developing roller extending along a first direction of the processing box; the photosensitive unit extends along a first direction and rotatably supports a photosensitive drum and a charging roller, and the charging roller is in contact with the photosensitive drum; the protective cover is used for covering the photosensitive drum, is clamped with the processing box and is mounted in the second direction of the processing box; the plug pin is inserted between the charging roller and the photosensitive drum to separate the charging roller from the photosensitive drum, the plug pin is installed in the third direction of the processing box, the plug pin and the protective cover are arranged in a split mode and connected with the protective cover in a clamped mode, and the first direction, the second direction and the third direction intersect. The bolt and the protective cover are of a split structure, so that the bolt and the protective cover can be produced separately, the production efficiency is improved, and the cost is reduced.

Description

Technical Field

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

[0002] Electrophotographic imaging devices typically contain a process cartridge that is removably installed within the device. Existing process cartridges contain a charging roller that contacts and charges the photosensitive drum. If the process cartridge is left unused for an extended period while the charging roller remains in contact with the photosensitive drum, contamination can occur due to cross-diffusion between the two rollers. Furthermore, during bumpy transportation, the charging roller can easily collide with the drum, causing scratches and deformation on the roller surface, seriously affecting printing quality.

[0003] The existing method mainly uses a piece of black paper to separate the charging roller and the photosensitive drum. The disadvantage of this method is that the black paper can easily be folded during operation, causing uneven pressure and deformation on the roller surface of the charging roller, resulting in black spots during printing and affecting the printing quality. Utility Model Content

[0004] In order to solve the above technical problems in the prior art, the present invention is achieved through the following technical solutions:

[0005] According to one aspect of the present invention, a processing box is provided, which includes a developing unit, a photosensitive unit, a protective cover and a latch, the developing unit including a developing chamber for accommodating a developer and a developing roller extending along a first direction of the processing box; the photosensitive unit extends along the first direction and rotatably supports a photosensitive drum and a charging roller, the charging roller being in contact with the photosensitive drum; the protective cover is used to cover the photosensitive drum, the protective cover is engaged with the processing box and is installed along a second direction of the processing box; the latch is inserted between the charging roller and the photosensitive drum to separate the charging roller and the photosensitive drum, the latch is installed along a third direction of the processing box, the latch is separately arranged from the protective cover and is engaged with the protective cover, wherein the first direction, the second direction and the third direction intersect.

[0006] The processing box provided in this embodiment has the latch and the protective cover as separate structures, so that the two can be produced separately, which is beneficial to improving production efficiency and reducing costs.

[0007] Preferably, the latch further includes an insertion portion and an exposed portion, the exposed portion is rotatably connected to the insertion portion; the insertion portion is inserted between the photosensitive drum and the charging roller; the exposed portion is provided with a gripping portion and a snap-fit portion, and the snap-fit portion is snap-fitted with the protective cover.

[0008] Preferably, the latch is an integrally formed part, and an elastic portion is provided between the exposed portion and the inserted portion, so that the exposed portion can be rotated to the first direction and the snap-fit portion is snap-fitted with the protective cover.

[0009] Preferably, the latch includes a limiting portion connected between the inserting portion and the elastic portion, and the limiting portion is used to limit the latch during installation.

[0010] Preferably, the photosensitive unit is provided with an insertion port, the insertion port opens toward the third direction, the insertion portion is inserted into the insertion port, the limiting portion abuts against the insertion port, and the exposed portion is exposed from the insertion port.

[0011] Preferably, the latch includes a limiting portion connected between the insertion portion and the exposed portion, and the limiting portion is used to limit the latch during installation.

[0012] Preferably, the exposed portion is annular.

[0013] Preferably, the protective cover includes a cover body and a snap-on portion, the cover body is located at one end of the processing box in the second direction, the snap-on portion is located at one end of the protective cover in the third direction of the processing box, the pin is located at one end of the processing box in the third direction, and the snap-on portion is snapped into engagement with the snap-on fitting portion.

[0014] Preferably, the photosensitive drum is located above the charging roller, the charging roller includes a roller body and a roller shaft, and the latch is inserted between the roller shaft and the surface of the photosensitive drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the latch and the protective cover in the processing box provided by the utility model;

[0016] Figure 2 A structural schematic diagram of the latch and the protective cover in the processing box provided by the utility model from another perspective;

[0017] Figure 3 This is a structural diagram of the processing box provided by the present invention in which the latch is not engaged with the protective cover;

[0018] Figure 4 This is a schematic cross-sectional view of the joints between the latch, the photosensitive drum, and the charging roller in the processing cartridge provided by the present invention;

[0019] Figure 5 This is a schematic diagram of the exploded structure of the processing box provided by the utility model;

[0020] Figure 6 A schematic diagram of a portion of the structure of the processing box provided by the utility model;

[0021] Figure 7 This is a schematic structural diagram of a latch in a processing box provided by the present invention. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0023] It should be noted that the terms "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0024] In this utility model, unless otherwise specified or limited, the terms "installation," "connection," "fixation," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0025] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0026] In the above description, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0027] In order to better explain the process box, Figure 1 A coordinate system is established in which the length direction of the processing box is the first direction.

[0028] See Figures 1 to 7 The utility model provides a processing box, which includes a developing unit and a photosensitive unit 1, and the developing unit and the photosensitive unit 1 are rotatably connected. The developing unit includes a developing chamber for accommodating a developer and a developing roller, the developing roller is rotatably supported in the developing chamber, and the developing roller extends along a first direction, and the developing roller is used to receive the developer. The photosensitive unit 1 includes a charging roller 2 and a photosensitive drum 3, and the charging roller 2 and the photosensitive drum 3 are rotatably mounted on the photosensitive unit 1, and both the charging roller 2 and the photosensitive drum 3 extend along the first direction of the processing box. The charging roller 2 includes a roller body 21 and a roller shaft 22 that passes through the roller body 21 and extends from both ends of the roller body 21, and the photosensitive drum 3 is partially exposed outside the photosensitive unit, and the charging roller 2 is located below the photosensitive drum 3. The charging roller 2 contacts the photosensitive drum 3 to charge the photosensitive drum 3, so that the photosensitive drum 3 can absorb the charged developer on the developing roller.

[0029] The processing box also includes a drive assembly, which includes a photosensitive coupling 4 and a developing coupling 5. The photosensitive coupling 4 is connected to one end of the photosensitive drum 3 and receives a driving force to drive the photosensitive drum 3 to rotate. The developing coupling 5 is connected to one end of the developing roller and receives a driving force to drive the developing roller to rotate. The processing box also includes a first end cover 61 and a second end cover 62. The first end cover 61 and the second end cover 62 are covered at both ends of the processing box in a first direction. The first end cover 61 supports one end of the photosensitive drum 3 and covers at least a portion of the electrode component. The second end cover 62 covers at least a portion of the drive assembly. The second end cover 62 is provided with a through hole, which is used to expose the photosensitive coupling 4 and the developing coupling 5 to the outside of the second end cover 62, so that the photosensitive coupling 4 and the developing coupling 5 can receive the driving force of the electronic imaging device.

[0030] The photosensitive unit 1 also includes a photosensitive frame 7, which connects and secures the first end cap 61 and the second end cap 62. Insertion openings 71 are also provided at both ends of the photosensitive frame 7 in the first direction of the process cartridge. Insertion openings 71 open toward the third direction. The first direction, the second direction, and the third direction intersect with each other. Preferably, the first direction, the second direction, and the third direction are perpendicular to each other.

[0031] The process cartridge further includes a protective cover 8, which extends along a first direction of the process cartridge and is mounted along a second direction of the process cartridge. The protective cover is used to cover the exposed portion of the photosensitive drum 3 to protect the photosensitive drum 3. The first direction intersects the second direction. The protective cover 8 includes a cover body 81 and a snap-fit portion 82. The cover body 81 covers the exposed portion of the photosensitive drum 3 and snap-fits to the process cartridge. Specifically, the cover body 81 is surrounded by snap-fit portions 811. Multiple snap-fit portions 811 snap-fit to the photosensitive frame 7, the first end cap 61, and the second end cap 62. The snap-fit portion 82 protrudes along the third direction of the process cartridge and is configured in a hook shape.

[0032] The process cartridge further includes latches 9, which are disposed at both ends of the process cartridge in the first direction and are mounted along the process cartridge in the third direction. Latch 9 is disposed on one side of the photosensitive frame 7 in the third direction. Because the photosensitive frame 7 has a larger area on one side in the third direction, this arrangement facilitates mounting of latch 9 on the process cartridge.

[0033] Specifically, the latch 9 includes an insertion portion 91 and an exposed portion 92. The exposed portion 92 is provided with a grip 921 for the user to grasp. The exposed portion 92 also includes a snap-fit portion 922 for engaging with the latch portion 82 to secure the latch 9. In this embodiment, the latch 9 is formed in an annular shape, with the grip 921 and snap-fit portion 922 formed on different sidewalls of the annular latch 9. In some embodiments, the exposed portion 92 may also be in the form of a sheet or block, with the grip 921 and snap-fit portion 922 formed at the same location on the latch. Compared to a sheet-shaped exposed portion 92, a pull ring-shaped exposed portion 92 allows the user to more securely grasp the exposed portion 92 when removing the latch 9, preventing slippage during removal. The insertion portion 91 is used to abut between the surface of the photosensitive drum 3 and the roller shaft 22 of the charging roller 2 to separate the photosensitive drum 3 from the charging roller 2, thereby preventing the charging roller 2 and the photosensitive drum 3 from contacting and being damaged.

[0034] When installing the latch 9, the grip portion 921 is used to insert the insertion portion 91 into the insertion opening 71 along the third direction of the process cartridge, bringing it into contact between the surface of the photosensitive drum and the roller shaft 22 of the charging roller 2. The snap-fitting portion 922 then engages the snap-fitting portion 82 of the protective cover 8. This prevents the latch 9 from shifting or falling out during transport of the process cartridge, ensuring that the latch 9 more stably separates the photosensitive drum 3 from the charging roller 2. When the user removes the protective cover along the second direction of the process cartridge, the exposed portion 92 of the latch 9 engages the snap-fitting portion 82 of the protective cover 8, allowing the latch 9 to be removed simultaneously with the protective cover 8, allowing the photosensitive drum 3 to contact the charging roller 2. The process cartridge can then be placed into the electronic imaging device for immediate use. This simple and convenient operation provides a good user experience. Of course, since the protective cover 8 and latch 9 are separate components connected by a snap-fit connection, they can also be removed separately.

[0035] Compared with the arrangement of the latch 9 and the protective cover 8 as an integrated structure, the processing box provided in this embodiment is provided with the latch 9 and the protective cover 8 as a separate structure, so that the two can be produced separately, which is conducive to improving production efficiency.

[0036] The exposed portion 92 is rotatably connected to the inserted portion 91. To install the latch, the exposed portion 92 is rotated around the inserted portion 91 from the third direction of the process cartridge to the first direction using the grip portion 921, and the snap-fit portion 922 is then snapped onto the snap portion 82. The rotatable arrangement of the exposed portion 92 and inserted portion 91 of the latch 9 facilitates production of the latch 9.

[0037] Preferably, the latch 9 is an integrally formed component, with an elastic portion 93 disposed between the exposed portion 92 and the inserted portion 91. The elasticity of the elastic portion 93 allows the exposed portion 92 to rotate to the first orientation and engage with the latch portion 82. The exposed portion 92 and the inserted portion 91 are integrally formed, which facilitates production and reduces labor and assembly costs. Alternatively, the exposed portion 92 and the inserted portion 91 are separate components, rotatably connected via a mating shaft.

[0038] The latch 9 also includes a stopper 94, which is connected between the insertion portion 91 and the exposed portion 92 and serves to hold the latch 9 in place during installation. During installation, the insertion portion 91 is inserted into the insertion opening 71, where it abuts between the surface of the photosensitive drum 3 and the roller shaft 22 of the charging roller 2. The stopper 94 is restrained by the insertion opening 71 to prevent the latch 9 from being inserted too far into the insertion opening 71, ensuring that the exposed portion 92 securely engages the latch portion 82. Specifically, the stopper 94 is located between the insertion portion 91 and the elastic portion 93, which is located between the stopper 94 and the exposed portion 92. When the stopper 94 is restrained by the insertion opening 71, the exposed portion 92 is deformed by the elastic portion 93 between the stopper 94 and the exposed portion 92. The stopper 94 can also cooperate with a portion of the photosensitive frame other than the insertion opening to hold the latch 9 in place.

[0039] The above are only some embodiments of the present invention. Those skilled in the art will appreciate that, without departing from the inventive concept of the present invention, they may make various modifications and improvements, or freely combine the above technical solutions, including freely combining the technical features of the different embodiments described above, all of which fall within the scope of protection of the present invention.

Claims

1. A process cartridge, characterized in that: include: a developing unit comprising a developing chamber for accommodating a developer and a developing roller extending along a first direction of the process cartridge; a photosensitive unit extending along the first direction and rotatably supporting a photosensitive drum and a charging roller, wherein the charging roller contacts the photosensitive drum; A protective cover, used for covering the photosensitive drum, wherein the protective cover is engaged with the process cartridge and installed along the second direction of the process cartridge; A latch is inserted between the charging roller and the photosensitive drum to separate the charging roller and the photosensitive drum. The latch is installed along the third direction of the processing box. The latch is separately provided with the protective cover and is engaged with the protective cover, wherein the first direction, the second direction and the third direction intersect.

2. The process cartridge according to claim 1, wherein: The latch further comprises an insertion portion and an exposed portion, wherein the exposed portion is rotatably connected to the insertion portion; The insertion portion is inserted between the photosensitive drum and the charging roller; The exposed portion is provided with a gripping portion and a snap-fitting portion, and the snap-fitting portion is snap-fitted with the protective cover.

3. The process cartridge according to claim 2, wherein: The latch is an integrally formed part, and an elastic part is provided between the exposed part and the inserted part, so that the exposed part can be rotated to the first direction and the snap-fit part is snap-fitted with the protective cover.

4. The process cartridge according to claim 3, wherein: The latch further includes a limiting portion connected between the inserting portion and the elastic portion, and the limiting portion is used to limit the latch during installation.

5. The process cartridge according to claim 4, wherein: The photosensitive unit is provided with an insertion port, the insertion port is opened toward the third direction, the insertion portion is inserted into the insertion port, the limiting portion abuts against the insertion port, and the exposed portion is exposed from the insertion port.

6. The process cartridge according to claim 2, wherein: The latch includes a limiting portion connected between the insertion portion and the exposed portion, and the limiting portion is used to limit the latch during installation.

7. The process cartridge according to claim 2, wherein: The exposed portion is annular.

8. The process cartridge according to any one of claims 2 to 7, wherein: The protective cover includes a cover body and a snap-on portion, the cover body is located at one end of the processing box in the second direction, the snap-on portion is located at one end of the protective cover in the third direction of the processing box, the latch is located at one end of the processing box in the third direction, and the snap-on portion is snapped into engagement with the snap-on fitting portion.

9. The process cartridge according to any one of claims 1 to 7, wherein: The photosensitive drum is located above the charging roller. The charging roller includes a roller body and a roller shaft. The latch is inserted between the roller shaft and the surface of the photosensitive drum.

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