Process cartridge

Abstract

The processing box includes a housing, a photosensitive drum, a developing roller, a powder feeding roller, a drive head, and a powder hopper. The photosensitive drum, developing roller, and powder feeding roller are rotatably supported on the housing. The axis of the photosensitive drum is parallel to but does not coincide with the axis of the drive head. The housing is provided with first and second positioning posts, the axis of the first positioning post coinciding with the axis of the photosensitive drum. The powder hopper is housed within the housing and has a powder outlet with a sealing film. Before the sealing film is removed, it is tightly attached to the welded sealing film plane at the edge of the powder outlet. The first distance b between the first edge of the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 5mm ≤ b ≤ 23mm. The first included angle g formed between the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 30° ≤ g ≤ 105°. Alternatively, the sixth included angle k formed between the sealing film and the plane passing through the axes of the first and second positioning posts satisfies -28° ≤ k ≤ 47°.

Description

Technical Field

[0001] This invention belongs to the field of electronic imaging technology, specifically relating to a toner processing box for an image forming device. Background Technology

[0002] A processing cartridge is a toner cartridge that is detachably installed into the main unit of an image forming device. As a single unit, the processing cartridge includes a toner hopper containing toner. The toner hopper has a toner outlet through which the developer is conveyed outwards. To prevent developer leakage and contamination, a sealing film is usually installed at the toner outlet before shipment to seal it and prevent developer leakage. In some processing cartridge products, the sealing film and the stirring blades located inside the toner hopper are integrated. When the stirring frame is driven, causing the stirring blades to rotate, the sealing film, which rotates with the stirring blades, is pulled away from the toner outlet. However, because the sealing film and the stirring blades are integrated, this can sometimes affect the rotation of the stirring frame, thus affecting the normal use of the processing cartridge. Summary of the Invention

[0003] The purpose of this invention is to provide a processing box with an externally pull-out sealing film, which allows the sealing film to be pulled out of the processing box during use, and avoids interference between the sealing film and other components inside the processing box, thus preventing the sealing film from being removed.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The processing box includes a housing, a photosensitive drum, a developing roller, a powder feeding roller, a drive head, and a powder hopper. The photosensitive drum, developing roller, and powder feeding roller are rotatably supported on the housing. The axis of the photosensitive drum is parallel to but does not coincide with the axis of the drive head. A first positioning post is provided on the housing, and the axis of the first positioning post coincides with the axis of the photosensitive drum. The powder hopper is housed within the housing and has a powder outlet. The powder outlet is covered with a removable sealing film. Before the sealing film is removed, the sealing film is tightly attached to the welded sealing film plane at the edge of the powder outlet to form a seal. The first distance b between the first edge of the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 5mm ≤ b ≤ 23mm. The first included angle g formed between the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 30° ≤ g ≤ 105°.

[0006] In some embodiments, the second included angle f formed between the plane passing through the axis of the photosensitive drum and the axis of the drive head and the plane passing through the axis of the photosensitive drum and the axis of the developing roller satisfies 30°≤f≤60°.

[0007] In some embodiments, the second distance 'a' between the second edge of the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 26mm ≤ a ≤ 34mm.

[0008] In some embodiments, the second edge of the sealing film is located below a plane passing through the axis of the powder feeding roller and the axis of the developing roller.

[0009] In some embodiments, the housing is further provided with a second positioning post and a third positioning post; when the processing box is installed in the image forming device, the plane formed by the axis of the second positioning post and the axis of the third positioning post is parallel to the guide rail plane in the image forming device on which the processing box is installed.

[0010] In some embodiments, the processing box is further provided with a powder dispensing blade, and the fourth included angle i formed between the blade plane of the powder dispensing blade and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 54°≤i≤82°.

[0011] In some embodiments, the processing box is further provided with a sealing scraper, and the fifth included angle j formed between the scraper plane of the sealing scraper and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 0°≤j≤35°.

[0012] In some embodiments, a powder outlet top wall connected to the welding sealing film plane is provided above the powder outlet away from the powder hopper cavity, and the tenth included angle e formed between the powder outlet top wall and the sealing film satisfies: 85°≤e≤160°.

[0013] As can be seen from the above technical solutions, for the toner outlet sealing film with an external pull structure, the processing box of the present invention uses the plane passing through the axis of the photosensitive drum and the axis of the drive head as a reference to optimize the internal structure of the processing box. By controlling the included angle between the sealing film and the plane involving the axes of components such as the photosensitive drum, drive head, and developing roller, and controlling the distance between the edge of the sealing film and the plane involving the axes of components such as the photosensitive drum, drive head, and developing roller, the sealing film, which is closely attached to the welding sealing film plane, will not be interfered with or blocked during the tearing and extraction process, and can be smoothly pulled out from the sealing film outlet. After the sealing film is pulled out, the developer can be discharged from the toner outlet under the action of the stirring frame. In particular, by controlling the included angle between the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head, the upper edge of the toner outlet can be basically located above the toner feeding roller. After the developer in the toner hopper is carried to the vicinity of the toner outlet by the stirring frame, it can fall smoothly onto the toner feeding roller under the action of gravity, thereby making the toner feeding uniform and the printing effect better.

[0014] To achieve the above objectives, the present invention also provides a processing cartridge, comprising a housing, a photosensitive drum, a developing roller, a powder feeding roller, a drive head, and a powder hopper. The photosensitive drum, developing roller, and powder feeding roller are rotatably supported on the housing. A first positioning post and a second positioning post are provided on the housing, the axis of the first positioning post coinciding with the axis of the photosensitive drum. The second positioning post is located above the first positioning post. The powder hopper is housed within the housing and has a powder outlet. The powder outlet has a removable sealing film. Before the sealing film is removed, the sealing film is tightly attached to the welded sealing film plane at the edge of the powder outlet to form a seal. The sixth included angle k formed between the sealing film and the plane passing through the axes of the first and second positioning posts satisfies -28°≤k≤47°.

[0015] In some embodiments, the third distance c between the second edge of the sealing film and the plane passing through the axis of the first positioning post and the axis of the second positioning post satisfies 34mm≤c≤42mm.

[0016] In some embodiments, the second edge of the sealing film is located below a plane passing through the axis of the developing roller and the axis of the developing roller.

[0017] In some embodiments, the seventh included angle m formed between the plane passing through the axis of the photosensitive drum and the axis of the developing roller and the plane passing through the axis of the first positioning post and the axis of the second positioning post satisfies 90°≤m≤110°.

[0018] In some embodiments, the processing box is further provided with a powder dispensing blade, and the eighth included angle n formed between the blade plane of the powder dispensing blade and the plane passing through the axis of the first positioning column and the axis of the second positioning column satisfies -4°≤n≤24°.

[0019] In some embodiments, the processing box is further provided with a sealing scraper, and the ninth included angle p formed between the scraper plane of the sealing scraper and the plane passing through the axis of the first positioning column and the axis of the second positioning column satisfies 55°≤p≤90°.

[0020] In some embodiments, a powder outlet top wall connected to the welding sealing film plane is provided above the powder outlet away from the powder hopper cavity, and the tenth included angle e formed between the powder outlet top wall and the sealing film satisfies: 85°≤e≤160°.

[0021] In some embodiments, a third positioning post is further provided on the housing; when the processing box is installed in the image forming device, the plane formed by the axis of the second positioning post and the axis of the third positioning post is parallel to the guide rail plane in the image forming device on which the processing box is installed.

[0022] As can be seen from the above technical solutions, for the powder outlet sealing film with an external pull structure, the processing box of the present invention uses the plane passing through the axis of the first positioning post and the axis of the second positioning post as a reference to optimize the internal structure of the processing box. By controlling the included angle between the sealing film and the plane involving the axes of components such as the positioning post, photosensitive drum, and developing roller, and by controlling the distance between the edge of the sealing film and the plane involving the axes of components such as the photosensitive drum, drive head, and developing roller, the sealing film, which is closely attached to the welding sealing film plane, will not be interfered with or blocked during the tearing and extraction process, and can be smoothly pulled out from the sealing film outlet. After the sealing film is pulled out, the developer can be discharged from the powder outlet under the action of the stirring frame. In particular, by controlling the included angle between the sealing film and the plane passing through the axis of the first positioning post and the axis of the second positioning post, the upper edge of the powder outlet can be basically located above the powder feeding roller. After the developer in the powder hopper is carried to the vicinity of the powder outlet by the stirring frame, it can fall smoothly onto the powder feeding roller under the action of gravity, thereby making the powder feeding uniform and the printing effect better.

[0023] To achieve the above objectives, the present invention also provides a processing cartridge, comprising a housing, a photosensitive drum, a developing roller, a powder feeding roller, a drive head, and a powder hopper. The photosensitive drum, developing roller, and powder feeding roller are rotatably supported on the housing. The axis of the photosensitive drum is parallel to but does not coincide with the axis of the drive head. A first positioning post is provided on the housing, and the axis of the first positioning post coincides with the axis of the photosensitive drum. The powder hopper is housed within the housing and has a powder outlet. The powder outlet is provided with a removable sealing film. Before the sealing film is removed, the sealing film is tightly attached to the welded sealing film plane at the edge of the powder outlet to form a seal on the powder outlet. The first edge and the second edge of the sealing film are respectively on both sides of a plane passing through the axis of the powder feeding roller and the axis of the developing roller.

[0024] In some embodiments, the projection of the first edge of the sealing film onto a plane passing through the axis of the powder feed roller and the axis of the developing roller is located between the axis of the powder feed roller and the axis of the developing roller, and is close to the axis of the powder feed roller.

[0025] In some embodiments, the projection of the second edge of the sealing film onto a plane passing through the axis of the powder feed roller and the axis of the developing roller is located outside the axis of the powder feed roller and the axis of the developing roller, and close to the axis of the powder feed roller.

[0026] In some embodiments, a powder outlet top wall connected to the welding sealing film plane is provided above the powder outlet away from the powder hopper cavity, and the tenth included angle e formed between the powder outlet top wall and the sealing film satisfies: 85°≤e≤160°.

[0027] In some embodiments, the width of the top wall of the powder outlet is 0.5 mm to 21 mm.

[0028] In some embodiments, the processing box is further provided with a powder dispensing blade, and the third included angle h formed between the blade plane of the powder dispensing blade and the sealing film satisfies: -51°≤h≤52°.

[0029] As can be seen from the above technical solutions, for the powder outlet sealing film with an external pull structure, the present invention optimizes the internal structure of the processing box. By controlling the positional relationship between the upper and lower edges of the sealing film and the axes of components such as the powder feeding roller and the developing roller, as well as designing structural parameters such as the distance between the powder dispensing knife and the powder outlet and the included angle between their respective planes, the sealing film, which is closely attached to the welding sealing film plane, will not be interfered with or blocked during the tearing and extraction process. It can be smoothly pulled out from the sealing film outlet. After the sealing film is pulled out, the developer can be discharged from the powder outlet under the action of the stirring rack. Attached Figure Description

[0030] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the processing box in Embodiment 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of the processing box from another angle in Embodiment 1 of the present invention;

[0033] Figure 3 This is a schematic diagram of the first side end of the processing box in Embodiment 1 of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the second side end of the processing box in Embodiment 1 of the present invention;

[0035] Figure 5 This is a schematic diagram of the processing box after the end cap on the second side has been removed according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram showing the separation of the powder hopper and waste powder hopper in the processing box of Embodiment 1 of the present invention;

[0037] Figure 7 This is a schematic diagram of the powder outlet of the powder hopper in Embodiment 1 of the present invention being sealed by a sealing film;

[0038] Figure 8 This is a schematic diagram of the powder outlet of the powder hopper after the sealing film has been removed, as shown in Embodiment 1 of the present invention.

[0039] Figure 9 This is a partial cross-sectional view of the processing box in Embodiment 1 of the present invention;

[0040] Figure 10 for Figure 9 An enlarged schematic diagram of part A in the middle;

[0041] Figure 11 This is a partial cross-sectional view of the processing box in Embodiment 2 of the present invention;

[0042] Figure 12 for Figure 11 Enlarged diagram of part B.

[0043] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Detailed Implementation

[0044] The present invention will now be described in detail with reference to the accompanying drawings. In describing the embodiments of the present invention, for ease of explanation, the drawings illustrating the device structure will be partially enlarged, not according to general proportions. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of the present invention. It should be noted that the drawings are simplified and use non-precise proportions, intended only to facilitate and clearly illustrate the embodiments of the present invention. Additionally, in the description of this application, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Terms such as "positive," "negative," "bottom," "upper," "lower," "front," "rear," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, not indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can also refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] Example 1

[0047] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The processing box in this embodiment includes a housing 1, inside which a powder hopper 1a and a waste powder hopper 1b are formed. Components such as a photosensitive drum 2, a developing roller 3, a powder feeding roller 4, and a stirring frame are disposed inside the housing 1 and are rotatably supported on the housing 1.

[0048] like Figure 1 As shown, the two ends of the housing 1 along the photosensitive drum axis L1 are the first end wall and the second end wall, respectively. In the first end wall (as shown in the figure) Figure 1 The lower side of the image forming device is provided with a first positioning post 1-1, a second positioning post 1-2, and a third positioning post 1-3, wherein the axis of the first positioning post 1-1 coincides with the axis L1 of the photosensitive drum. In this embodiment, the positioning post is a cylinder; in other embodiments, the positioning post can also be a prism, a hollow cylinder, or other irregularly shaped cylinder. The axis described in this invention is a straight line passing through the geometric center of any cross-section of the cylinder and parallel to the generatrix direction. The sealing film outlet of the sealing film 5 is provided on the first end wall of the housing 1. The function of the first, second, and third positioning posts is to assist in the positioning of the processing box when it is installed in the image forming device. In this embodiment, when the processing box is installed in the image forming device, the third plane s6 formed by the axis of the second positioning post 1-2 and the axis of the third positioning post 1-3 is parallel to the guide rail plane in the image forming device where the processing box is installed.

[0049] The second end wall of housing 1 (e.g.) Figure 2 A drive head 6 is provided on the upper side of the image forming device. The drive head 6 is used to receive the rotational driving force from the image forming device and transmit the rotational driving force directly or indirectly to the developing roller gear, the powder feeding roller gear, and the stirring frame gear through gear meshing, so as to drive the rotating components such as the developing roller 3, the powder feeding roller 4, and the stirring frame to rotate. A photosensitive drum gear is provided at the end of the photosensitive drum 2. The photosensitive drum gear is used to receive the rotational driving force from the image forming device, so as to make the photosensitive drum 2 rotate, and at the same time, it can also prevent the driving gear of the image forming device from moving along the axis. The axis of the drive head 6 is parallel to but does not coincide with the axis of the photosensitive drum L1. In this embodiment, the drive head 6 is provided on the powder hopper 1a.

[0050] like Figure 6 , Figure 7 , Figure 8 and Figure 9 , Figure 10 As shown, in this embodiment, the photosensitive drum 2 is rotatably supported on the waste toner hopper 1b. The first positioning post 1-1, the second positioning post 1-2, and the third positioning post 1-3 are all disposed on the end wall of the waste toner hopper 1b (shell 1). The axis of the first positioning post 1-1 coincides with the axis L1 of the photosensitive drum.

[0051] The powder hopper 1a is provided with a powder outlet 1c, through which the developer can be delivered to the outside of the powder hopper 1a. The outer edge of the powder outlet 1c forms a welding sealing plane s3 for welding sealing, such as... Figure 6As shown, the sealing film 5 is tightly attached to the welding sealing film plane s3 by welding, forming a seal for the powder outlet 1c. In this embodiment of the invention, when the sealing film 5 is tightly attached to the welding sealing film plane s3, it can be understood that the sealing film 5 and the welding sealing film plane s3 are coplanar, that is, the angle between the sealing film and the relevant plane is equal to the angle between the plane where the sealing film is located (the welding sealing film plane) and the relevant plane. Figure 7 As shown, the sealing film 5 has four edges: a first edge a1 (upper edge), a second edge a2 (lower edge), a third edge a3, and a fourth edge. The first edge a1 and the second edge a2 are parallel to the photosensitive drum axis L1 and are long edges; the third edge a3 and the fourth edge (not shown) are perpendicular to the first edge a1 and the second edge a2, and are short edges. In this embodiment, the first edge a1 is located above the powder outlet 1c, and the second edge a2 is located below the powder outlet 1c. That is, the first edge a1 is close to the first plane s1 passing through the photosensitive drum axis L1 and the drive head axis L2, and the second edge a2 is close to the intersection line of the welding sealing film plane s3 and the bottom wall of the housing 1. The second edge a2 is far from the first plane s1 passing through the photosensitive drum axis L1 and the drive head axis L2. Furthermore, the second edge a2 is located below the fifth plane s8 passing through the powder feeding roller axis and the developing roller axis. Determining the position of the second edge a2 indirectly defines the position of the lower edge of the powder outlet, facilitating the discharge of developer from the powder hopper.

[0052] The powder delivery roller 4 is located outside the developer hopper (hereinafter referred to as the powder hopper cavity), near the powder outlet 1c, and is used to transfer the developer discharged from the powder outlet 1c to the developing roller 3, which is arranged adjacent to the powder delivery roller 4. Figure 7 As shown, the powder hopper 1a is provided with a sealing scraper mounting surface s4 and a powder dispensing blade mounting surface s5. The sealing scraper mounting surface s4 is located on the bottom wall of the powder hopper 1a, below and in front of the powder outlet 1c. The powder dispensing blade mounting surface s5 is located on the left and right sides along the length of the powder outlet 1c (the length of the powder outlet is parallel to the axis of the photosensitive drum). A sealing scraper 7 is mounted on the sealing scraper mounting surface s4, located below the developing roller 3, and can seal the gap between the developing roller 3 and the bottom wall of the powder hopper 1a. A powder dispensing blade 8 is mounted on the powder dispensing blade mounting surface s5, located above the developing roller 3, with its free end in contact with the surface of the developing roller 3.

[0053] To ensure the sealing film 5 can be smoothly pulled out from the sealing film outlet without obstruction or interference, the first distance b between the first edge a1 of the sealing film 5 and the first plane s1 passing through the photosensitive drum axis L1 and the drive head axis L2 satisfies: 5mm ≤ b ≤ 23mm; and the first included angle g formed between the sealing film 5 and the first plane s1 passing through the photosensitive drum axis L1 and the drive head axis L2 satisfies: 30° ≤ g ≤ 105°. Simultaneously, by controlling the included angle between the sealing film and the plane passing through the photosensitive drum axis and the drive head axis, the toner outlet is positioned essentially above the toner feeding roller. The toner in the toner hopper, after being carried to the vicinity of the outlet by the stirring frame, can smoothly fall onto the toner feeding roller under gravity, resulting in uniform toner feeding and better printing quality. Furthermore, by limiting the position and angle of the upper edge of the toner outlet, interference with other structures due to an excessively high upper edge can be avoided, preventing poor toner dispensing.

[0054] In some embodiments, the second distance a between the second edge a2 of the sealing film and the first plane s1 passing through the photosensitive drum axis L1 and the drive head axis L2 satisfies: 26mm ≤ a ≤ 34mm. Determining this second distance range indirectly limits the position of the lower edge of the toner outlet, facilitating the discharge of developer from the toner cartridge. By limiting the position of the lower edge of the toner outlet, the toner feeding roller can fully absorb toner, thus better feeding toner to the developing roller.

[0055] In some embodiments, the distance d (i.e. the width of the sealing film 5) between the first edge a1 and the second edge a2 of the sealing film 5 is 12mm≤d≤21mm.

[0056] In some embodiments, the second included angle f formed between the first plane s1 passing through the photosensitive drum axis L1 and the drive head axis L2, and the second plane s2 passing through the photosensitive drum axis L1 and the developing roller axis, satisfies: 30°≤f≤60°. Limiting the range of the second included angle can prevent interference between the photosensitive drum and the developing roller, as well as between the developing roller and other components, and makes the structural design of the processing cartridge more reasonable.

[0057] In some embodiments, the fourth included angle i formed between the blade plane of the powder discharge blade 8 and the first plane s1 passing through the photosensitive drum axis L1 and the drive head axis L2 satisfies: 54°≤i≤82°.

[0058] In some embodiments, the fifth included angle j formed between the scraper plane of the sealing scraper 7 and the first plane of the photosensitive drum axis L1 and the drive head axis L2 satisfies: 0°≤j≤35°.

[0059] In some embodiments, the powder outlet 1c has a powder outlet top wall s5 that is integrally connected to the welding sealing film plane s3 above it away from the powder hopper cavity, and the tenth included angle e formed between the powder outlet top wall s5 and the sealing film 5 satisfies: 85°≤e≤160°.

[0060] Although the sealing film structure that can be pulled out from the processing box housing does not affect the normal use of other components inside the processing box after being pulled out, compared to the sealing film structure integrated with the stirring blade, the position of the powder outlet plane of the powder hopper (i.e., the welding sealing film plane) and its positional relationship with other parts need to be fully considered when designing the internal structure of the processing box to avoid interference with other components such as the sealing scraper, powder discharge knife, and powder feeding roller when the sealing film is pulled out, thus affecting the pulling out of the sealing film. In this embodiment, the first plane passing through the photosensitive drum axis L1 and the drive head axis L2 is used as a reference to design the angle of the sealing film (welding sealing film plane) and the distance between the edge of the sealing film and the relevant planes. Among them, the angle of the sealing film (welding sealing film plane) is particularly critical. By adjusting the included angle and positional relationship (distance) formed between it and each plane, the sealing film that is in close contact with the welding sealing film plane will not be interfered with or blocked during the tearing off of the welding sealing film plane and the extraction process. Meanwhile, the angles formed between the plane of the photosensitive drum axis L1 and the developing roller axis and the plane of the photosensitive drum axis L1 and the drive head axis L2, the angle formed between the scraper plane and the plane of the photosensitive drum axis L1 and the drive head axis L2, the angle formed between the top wall of the powder outlet and the sealing film, and the angle formed between the blade plane of the powder discharge knife and the sealing film are also to avoid interference between the developing roller, the powder discharge knife, the powder feeding roller, the sealing scraper, and other components after adjusting the sealing film outlet position.

[0061] Example 2

[0062] The main difference between this embodiment and embodiment 1 is that this embodiment uses the fourth plane s7 passing through the axis of the first positioning post and the axis of the second positioning post as a reference to design the angle of the sealing film (welding sealing film plane) and the distance between the edge of the sealing film and the relevant plane.

[0063] like Figure 1 , Figure 7 , Figure 11 and Figure 12 As shown, the processing box in this embodiment includes a housing 1, inside which a powder hopper 1a and a waste powder hopper 1b are formed. Components such as a photosensitive drum 2, a developing roller 3, a powder feeding roller 4, and a stirring frame are disposed inside the housing 1 and are rotatably supported on the housing 1.

[0064] like Figure 1 As shown, the two ends of the housing 1 along the photosensitive drum axis L1 are the first end wall and the second end wall, respectively. In the first end wall (as shown in the figure) Figure 1 The lower side of the housing 1 is provided with a first positioning post 1-1, a second positioning post 1-2, and a third positioning post 1-3, wherein the axis of the first positioning post 1-1 coincides with the axis of the photosensitive drum L1. The sealing film outlet of the sealing film 5 is provided on the first end wall of the housing 1. The drive head is provided on the second end wall of the housing 1.

[0065] The photosensitive drum 2 is rotatably supported on the toner hopper 1a. The first positioning post 1-1, the second positioning post 1-2, and the third positioning post 1-3 are all located on the end wall of the waste toner hopper 1b (shell 1). The axis of the first positioning post 1-1 coincides with the axis L1 of the photosensitive drum, and the second positioning post 1-2 is located above the first positioning post 1-1. In this embodiment, when the processing cartridge is installed in the image forming apparatus, the third plane s6 formed by the axes of the second positioning post 1-2 and the third positioning post 1-3 is parallel to the guide rail plane on which the processing cartridge is installed in the image forming apparatus.

[0066] The powder container 1a is provided with a powder outlet 1c, through which the developer can be delivered to the outside of the powder container 1a. The outer edge of the powder outlet 1c forms a welding sealing film plane s3 for welding sealing film. The sealing film 5 is welded tightly onto the welding sealing film plane s3, forming a seal over the powder outlet 1c. Figure 7 As shown, the sealing film 5 has four edges: a first edge a1, a second edge a2, a third edge a3, and a fourth edge. The first edge a1 and the second edge a2 are parallel to the photosensitive drum axis L1 and are long edges; the third edge a3 and the fourth edge (not shown) are perpendicular to the first edge a1 and the second edge a2, and are short edges. In this embodiment, the first edge a1 is located above the powder outlet 1c, and the second edge a2 is located below the powder outlet 1c. That is, the first edge a1 is close to the first plane s1 passing through the photosensitive drum axis L1 and the drive head axis L2, and the second edge a2 is close to the intersection line of the welding sealing film plane s3 and the bottom wall of the housing 1. The second edge a2 is far from the first plane s1 passing through the photosensitive drum axis L1 and the drive head axis L2. Furthermore, the second edge a2 is located below the fifth plane s8 passing through the powder feeding roller axis and the developing roller axis.

[0067] The powder feeding roller 4 is located on the outside of the powder hopper cavity, near the powder outlet 1c. For example... Figure 7 As shown, the powder hopper 1a is provided with a sealing scraper mounting surface s4 and a powder dispensing blade mounting surface s5. The sealing scraper mounting surface s4 is located on the bottom wall of the powder hopper 1a, below and in front of the powder outlet 1c. The powder dispensing blade mounting surface s5 is located on the left and right sides along the length of the powder outlet 1c. A sealing scraper 7 is mounted on the sealing scraper mounting surface s4, located below the developing roller 3, and can seal the gap between the developing roller 3 and the bottom wall of the powder hopper 1a. A powder dispensing blade 8 is mounted on the powder dispensing blade mounting surface s5, located above the developing roller 3, with its free end in contact with the surface of the developing roller 3.

[0068] In order to ensure that the sealing film 5 can be smoothly pulled out from the sealing film outlet, that is, the sealing film outlet is not blocked or interfered with, the sixth included angle k formed between the welding sealing film plane s3 and the fourth plane s7 passing through the axis of the first positioning post and the axis of the second positioning post satisfies: -28°≤k≤47°.

[0069] In some embodiments, the fourth distance q between the first edge a1 of the sealing film 5 and the fourth plane s7 passing through the axes of the first and second positioning posts satisfies: 22mm ≤ q ≤ 41mm. The third distance c between the second edge a2 of the sealing film 5 and the fourth plane s7 passing through the axes of the first and second positioning posts satisfies: 34mm ≤ c ≤ 42mm. Further, the distance d between the first edge a1 and the second edge a2 of the sealing film 5 is 12mm to 21mm. The second edge a2 of the sealing film 5 is located below the fifth plane s8 passing through the axes of the powder feeding roller and the developing roller. By limiting the position and angle of the upper edge of the powder outlet, it is possible to avoid the upper edge being too high and interfering with other structures, resulting in poor powder output; by limiting the position of the lower edge of the powder outlet, the powder feeding roller can fully adsorb toner, so as to better feed toner to the developing roller.

[0070] In some embodiments, the seventh included angle m formed between the second plane s2 passing through the photosensitive drum axis L1 and the developing roller axis and the fourth plane s7 passing through the first positioning post axis and the second positioning post axis satisfies: 90°≤m≤110°.

[0071] In some embodiments, the eighth included angle n formed between the blade plane of the powder discharge blade 8 and the fourth plane s7 passing through the axis of the first positioning post and the axis of the second positioning post satisfies: -4°≤n≤24°.

[0072] In some embodiments, the ninth included angle p formed between the scraper plane of the sealing scraper 7 and the fourth plane s7 passing through the axis of the first positioning post and the axis of the second positioning post satisfies: 55°≤p≤90°.

[0073] In some embodiments, the powder outlet 1c has a powder outlet top wall s5 that is integrally connected to the top of the welding sealing film plane s3, and the tenth included angle e formed between the powder outlet top wall s5 and the sealing film 5 satisfies: 85°≤e≤160°.

[0074] As can be seen from the above technical solutions, for the powder outlet sealing film with an external pull structure, the processing box of the present invention uses the plane passing through the axis of the first positioning post and the axis of the second positioning post as a reference to optimize the internal structure of the processing box. By controlling the included angle between the sealing film and the plane involving the axes of components such as the positioning post, photosensitive drum, and developing roller, and by controlling the distance between the edge of the sealing film and the plane involving the axes of components such as the photosensitive drum, drive head, and developing roller, the sealing film, which is closely attached to the welding sealing film plane, will not be interfered with or blocked during the tearing and extraction process, and can be smoothly pulled out from the sealing film outlet. After the sealing film is pulled out, the developer can be discharged from the powder outlet under the action of the stirring frame. In particular, by controlling the included angle between the sealing film and the plane passing through the axis of the first positioning post and the axis of the second positioning post, the upper edge of the powder outlet can be basically located above the powder feeding roller. After the developer in the powder hopper is carried to the vicinity of the powder outlet by the stirring frame, it can fall smoothly onto the powder feeding roller under the action of gravity, thereby making the powder feeding uniform and the printing effect better. Meanwhile, the angles formed between the plane passing through the photosensitive drum axis L1 and the developing roller axis and the plane passing through the first positioning column axis and the second positioning column axis, the angle formed between the scraper plane and the plane passing through the first positioning column axis and the second positioning column axis, the angle formed between the top wall of the powder outlet and the sealing film, and the angle formed between the blade plane of the powder outlet knife and the sealing film are also to avoid interference between the developing roller, powder outlet knife, powder feeding roller, sealing scraper and other components after adjusting the sealing film outlet position.

[0075] Example 3

[0076] like Figures 1 to 5 The processing box shown in this embodiment includes a housing 1. Inside the housing 1, a powder hopper 1a and a waste powder hopper 1b are formed. Components such as a photosensitive drum 2, a developing roller 3, a powder feeding roller 4, and a stirring frame are disposed inside the housing 1 and rotatably supported on the housing 1. The axis L1 of the photosensitive drum is parallel to but does not coincide with the axis L2 of the drive head.

[0077] The housing 1 has a first end wall and a second end wall at its two ends along the photosensitive drum axis L1. A first positioning post 1-1, a second positioning post 1-2, and a third positioning post 1-3 are provided on the first end wall. The axis of the first positioning post 1-1 coincides with the photosensitive drum axis L1. A drive head 6 is provided on the second end wall of the housing 1. The drive head 6 receives the rotational driving force from the image forming device and transmits the rotational driving force directly or indirectly to the developing roller gear, the powder feeding roller gear, the stirring frame gear, and the photosensitive drum gear through gear meshing, thereby driving the rotating components such as the developing roller 3, the powder feeding roller 4, the stirring frame, and the photosensitive drum 2 to rotate.

[0078] like Figure 6 and Figure 7As shown, the powder hopper 1a is provided with a powder outlet 1c, and the powder outlet 1c is provided with a removable sealing film 5. The sealing film 5 is tightly attached to the welded sealing film plane s3 at the edge of the powder outlet, forming a seal for the powder outlet. Figure 7 As shown, the sealing film 5 has four edges: a first edge a1, a second edge a2, a third edge a3, and a fourth edge. The first edge a1 and the second edge a2 are parallel to the photosensitive drum axis L1 and are long edges. The third edge a3 and the fourth edge (not shown) are perpendicular to the first edge a1 and the second edge a2, and are short edges. In this embodiment, the first edge a1 and the second edge a2 are located on opposite sides of the plane passing through the developing roller axis and the toner feeding roller axis, respectively. Because the sealing film edge is approximately close to the toner outlet edge, this indirectly defines the positional relationship between the upper and lower edges of the toner outlet and the toner feeding roller. This ensures that the upper edge of the toner outlet is essentially above the toner feeding roller, which facilitates the developer in the toner hopper being carried to the vicinity of the toner outlet by the stirring frame and then falling smoothly onto the toner feeding roller under gravity, resulting in uniform toner feeding and better printing quality. Simultaneously, by defining the position of the lower edge of the toner outlet, the toner feeding roller can fully absorb toner, thus better feeding toner to the developing roller.

[0079] Furthermore, the projection of the first edge a1 onto the plane passing through the axis of the powder feeding roller and the axis of the developing roller is located between the axis of the powder feeding roller and the axis of the developing roller, and is close to the axis of the powder feeding roller 4. The projection of the second edge a2 onto the plane passing through the axis of the powder feeding roller and the axis of the developing roller is located outside the axis of the powder feeding roller and the axis of the developing roller, and is close to the axis of the powder feeding roller 4.

[0080] like Figure 7 As shown, the powder hopper 1a is provided with a sealing scraper mounting surface s4 and a powder dispensing blade mounting surface s5. The sealing scraper mounting surface s4 is located on the bottom wall of the powder hopper 1a, below and in front of the powder outlet 1c. The powder dispensing blade mounting surface s5 is located on the left and right sides along the length of the powder outlet 1c. A sealing scraper 7 is mounted on the sealing scraper mounting surface s4, located below the developing roller 3, and can seal the gap between the developing roller 3 and the bottom wall of the powder hopper 1a. A powder dispensing blade 8 is mounted on the powder dispensing blade mounting surface s5, located above the developing roller 3, with its free end in contact with the surface of the developing roller 3. A powder outlet top wall s5, integrally connected to the welding sealing film plane, is provided above the powder outlet, away from the powder hopper cavity. The tenth included angle e formed between the powder outlet top wall s5 and the sealing film 5 satisfies: 85°≤e≤160°.

[0081] In some embodiments, the width of the top wall of the powder outlet is 0.5 mm to 21 mm.

[0082] In some embodiments, the third included angle h formed between the blade plane of the powder dispensing blade 8 and the sealing film 5 satisfies: -51°≤h≤52°.

[0083] As can be seen from the above technical solutions, for the powder outlet sealing film with an external pull-out structure, this invention optimizes the internal structure of the processing box. By controlling the positional relationship between the upper and lower edges of the sealing film and the axes of components such as the powder feeding roller and the developing roller, as well as designing structural parameters such as the distance between the powder dispensing blade and the powder outlet and the included angle between their respective planes, the sealing film, which is tightly attached to the welding sealing film plane, will not be interfered with or obstructed during the tearing and extraction process, and can be smoothly pulled out from the sealing film outlet. After the sealing film is pulled out, the developer can be discharged from the powder outlet under the action of the stirring rack. At the same time, limiting the included angle between the top wall of the powder outlet and the sealing film, the width of the top wall of the powder outlet, and the included angle between the blade plane of the powder dispensing blade and the sealing film are also to avoid interference with other components such as the powder dispensing blade and the powder feeding roller after adjusting the sealing film outlet position.

[0084] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A processing box, comprising a housing, a photosensitive drum, a developing roller, a powder feeding roller, a drive head, and a powder hopper, wherein the photosensitive drum, developing roller, and powder feeding roller are rotatably supported on the housing; the axis of the photosensitive drum is parallel to but not coincident with the axis of the drive head; a first positioning post is provided on the housing, the axis of the first positioning post being coincident with the axis of the photosensitive drum; the powder hopper is housed within the housing, the powder hopper is provided with a powder outlet, and the powder outlet is provided with a removable sealing film; before the sealing film is removed, the sealing film is tightly adhered to the welded sealing film plane at the edge of the powder outlet to form a seal against the powder outlet; characterized in that... The first distance b between the first edge of the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 5mm≤b≤23mm; The first included angle g formed between the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 30°≤g≤105°.

2. The processing box according to claim 1, characterized in that, The second edge of the sealing film is located below the plane passing through the axis of the powder feeding roller and the axis of the developing roller.

3. The processing box according to claim 2, characterized in that, The second distance 'a' between the second edge of the sealing film and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 26mm ≤ a ≤ 34mm.

4. The processing box according to claim 1, 2, or 3, characterized in that, The second included angle f formed between the plane passing through the axis of the photosensitive drum and the axis of the drive head and the plane passing through the axis of the photosensitive drum and the axis of the developing roller satisfies 30°≤f≤60°.

5. The processing box according to claim 1, 2, or 3, characterized in that, The housing is also provided with a second positioning post and a third positioning post; when the processing box is installed in the image forming device, the plane formed by the axis of the second positioning post and the axis of the third positioning post is parallel to the guide rail plane in the image forming device on which the processing box is installed.

6. The processing box according to claim 1, 2, or 3, characterized in that, The processing box is also equipped with a powder dispensing blade, and the fourth included angle i formed between the blade plane of the powder dispensing blade and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 54°≤i≤82°.

7. The processing box according to claim 1, 2, or 3, characterized in that, The processing box is also provided with a sealing scraper, and the fifth included angle j formed between the scraper plane of the sealing scraper and the plane passing through the axis of the photosensitive drum and the axis of the drive head satisfies 0°≤j≤35°.

8. The processing box according to claim 1, 2, or 3, characterized in that, Above the powder outlet, away from the powder hopper cavity, is a powder outlet top wall connected to the welding sealing film plane. The tenth included angle e formed between the powder outlet top wall and the sealing film satisfies: 85°≤e≤160°.

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