Counting gear assembly and processing box

Abstract

The invention discloses a counting gear assembly and a processing box. The counting gear assembly comprises a gear support arranged on the end wall of a shell; the counting gear is arranged on the gear support and is of a full-tooth structure, and a first rib and a second rib are arranged on the counting gear; when the gear support rotates, the counting gear is driven to move between the meshing position and the separating position, and the counting gear and the driving gear synchronously rotate at the meshing position. In the rotation process of the counting gear, the first rib can be in contact with the guide rib and move along the guide rib, so that the counting gear moves towards the separation position; a gear holder return spring for moving the gear holder from the disengaged position to the engaged position; the limiting support can move between an initial position and a limiting position, and when the limiting support moves to the limiting position, the limiting support can make contact with the second rib and limit the counting gear; the limiting support reset spring enables the limiting support to move from the limiting position to the initial position. According to the invention, the counting gear can be automatically reset.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic imaging photography, and in particular relates to a counting gear assembly of a processing box used in an image forming device and the processing box. Background Art

[0002] Image forming devices such as laser printers and copiers usually have an image processing unit and a developing unit. The electrostatic latent image formed on the image processing unit is developed using a developer such as toner provided by the developing unit to form a visible image on a medium such as paper. The developing unit includes a processing box, which is a box that can be detachably installed in the main body of the image forming device. The processing box includes a powder bin for containing the developer. In order to facilitate users to judge the service life of the processing box, some processing boxes are provided with a counting gear, which can cooperate with the detection mechanism on the image forming device. When the processing box is installed in the machine, the image forming device resets the preset life value inside the image forming device by identifying the counting gear on the processing box. When the number of pages printed by the processing box reaches the preset life value, it is considered that the developer in the processing box has been consumed and the processing box cannot be used anymore. However, for some large-capacity processing cartridges, the developer capacity loaded is more than that of standard-capacity processing cartridges, and the preset life value of the image forming device is usually set according to the standard capacity and cannot be changed. When the number of printed pages reaches the preset life value, the image forming device prompts that the developer has been consumed, and the processing cartridge cannot be used further, which will cause the developer in the large-capacity processing cartridge to be not fully used and cause waste. In addition, for some processing cartridges that can be refilled with developer, since the counting gear cannot be reset, the processing cartridge cannot be reused, which increases the user's cost of use. Summary of the invention

[0003] The object of the present invention is to provide a counting gear assembly and a processing box in which the counting gear can be automatically reset.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A counting gear assembly is used in a processing box, the processing box includes a shell and a driving gear arranged on the end wall of the shell; the counting gear assembly includes: a gear bracket rotatably arranged on the end wall of the shell around a first axis; a counting gear with a full-tooth structure rotatably arranged on the gear bracket around a second axis, and the counting gear is provided with a first rib and a second rib; when the gear bracket rotates, the counting gear is driven to move between a meshing position and a separation position, the counting gear is meshed with the driving gear at the meshing position, and the counting gear is separated from the driving gear at the separation position ; guide ribs, during the rotation of the counting gear, the first rib can contact the guide ribs and move along the guide ribs to move the counting gear to the separation position; a gear bracket reset spring that moves the gear bracket from the separation position to the meshing position; a limit bracket, the limit bracket can move between an initial position and a limit position, and when the limit bracket moves to the limit position, the limit bracket can contact the second rib and limit the counting gear; a limit bracket reset spring that moves the limit bracket from the limit position to the initial position.

[0006] In some embodiments, the driving gear is a stirring frame gear disposed at the end of the stirring frame.

[0007] Furthermore, the counting gear is provided with a third rib extending radially along the counting gear, and the driving gear includes a first tooth portion meshing with the tooth portion of the counting gear and a second tooth portion meshing with the third rib; when in the meshing position, the third rib can mesh with the second tooth portion.

[0008] Furthermore, the diameter of the addendum circle of the first tooth portion is greater than the diameter of the addendum circle of the second tooth portion.

[0009] Furthermore, the outer end of the counting gear is provided with the first rib protruding radially outward along the counting gear, and the inner side of the counting gear is provided with the second rib protruding in a direction parallel to the axis of the counting gear; the guide rib is provided on the inner wall of the gear end cover of the processing box.

[0010] In some embodiments, a limiting portion is provided on the gear bracket, and a limiting protrusion is provided on the end wall of the processing box; when the gear bracket moves to the meshing position, the limiting portion is blocked by the limiting protrusion, so that the gear bracket cannot exceed the meshing position.

[0011] The present invention also provides a processing box, including a shell and a gear end cover arranged at the end of the shell, the shell includes a powder bin for accommodating the developer, and a stirring frame is arranged in the powder bin; it also includes the aforementioned counting gear assembly, the driving gear and the counting gear are located on the outside of the shell and are arranged at the same side end of the shell, and are covered by the gear end cover.

[0012] In some embodiments, a first assembly column protruding outward in an axial direction parallel to the stirring frame is provided on the end wall of the shell, the gear bracket is sleeved on the first assembly column, and the axis of the first assembly column is the first axis; a second assembly column parallel to the first assembly column is provided on the gear bracket, the counting gear is sleeved on the second assembly column, and the axis of the second assembly column is the second axis.

[0013] In some embodiments, the guide ribs are arc-shaped ribs.

[0014] It can be seen from the above technical scheme that the counting gear assembly of the present invention sets the counting gear on a rotatable gear bracket, and the gear bracket drives the counting gear to move between the meshing position and the separation position. When in the meshing position, the counting gear rotates with the stirring frame gear to realize the detection of the processing box falling into the machine for installation. In the separation position, the counting gear does not rotate with the stirring frame gear and is limited by the limiting bracket. After the recognition of the preset value of the processing box life is completed once, the limiting bracket automatically returns to the initial position, and the counting gear automatically returns to the meshing position. After installation, it can be recognized by the detection mechanism of the image forming device again, and the preset value of the life can be reset, so as to continue to use the remaining developer in the processing box, or the processing box can be refilled with developer and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a partial structural schematic diagram of a processing box according to an embodiment of the present invention;

[0017] Figure 2 It is a side view of the process box of the embodiment of the present invention after removing the gear end cover;

[0018] Figure 3 This is a schematic diagram of the structure of a counting gear according to an embodiment of the present invention;

[0019] Figure 4 It is a schematic structural diagram of another angle of the counting gear in an embodiment of the present invention;

[0020] Figure 5 This is a schematic structural diagram of a gear end cover according to an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of the gear of the stirring frame according to an embodiment of the present invention;

[0022] Figure 7 It is a schematic diagram of the front cover of the printer after the process cartridge is installed in the machine according to the embodiment of the present invention;

[0023] Figure 8 It is a schematic diagram of the case where the gear of the stirring frame drives the counting gear to rotate until the first rib contacts the guide inclined surface during the use of the processing cartridge of the present invention;

[0024] Fig. 9 for Figure 8 A partial enlarged schematic diagram of part A;

[0025] Fig.10 It is a schematic diagram of the separation of the stirring frame gear and the counting gear during the use of the processing box of the present invention;

[0026] Fig.11 for Fig.10 A partial enlarged schematic diagram of part B;

[0027] Fig.12 It is a schematic diagram of the counting gear being restricted from rotating by the limiting bracket when the counting gear is in the separated position during the use of the processing cartridge of the present invention;

[0028] Fig.13 for Fig.12 A partial enlarged schematic diagram of part C in the middle;

[0029] Fig.14 This is a schematic diagram of releasing the limit on the counting gear after the limit bracket is reset after opening the front cover of the printer.

[0030] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with the accompanying drawings. When describing the embodiments of the present invention in detail, for the convenience of explanation, the drawings representing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. It should be noted that the drawings are simplified in form and use non-precise proportions, which are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention. At the same time, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated; the terms "positive", "negative", "bottom", "upper", "lower", "front", "back", "left", "right", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two elements, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 and Figure 2 As shown, the processing box of this embodiment includes a shell 1, and the shell 1 has a powder bin for accommodating developer, and the powder bin is provided with a stirring frame 3 that can rotate around its own axis. The two ends of the shell 1 along the axial direction of the stirring frame are respectively provided with a gear end cover 2 and a conductive end cover (not shown). A stirring frame gear 4 and a counting gear 5 and other gears, such as a photosensitive drum gear, an intermediate transmission gear, etc. are provided on one end wall of the shell 1. For the convenience of explanation, the gear that directly meshes with the counting gear and drives the counting gear to rotate is defined as a driving gear. The driving gear of this embodiment is the stirring frame gear 4.

[0034] The stirring frame gear 4 is arranged at the end of the stirring frame 3. When the stirring frame gear 4 rotates, it can drive the stirring frame 3 to rotate, so that the stirring frame 3 can stir and transport the developer in the powder bin. The stirring frame gear 4 and the counting gear 5 are both arranged on the outside of the housing 1 and covered by the gear end cover 2. The counting gear assembly of this embodiment includes a counting gear 5, a gear bracket 6, a gear bracket reset spring 7, a limit bracket 8, a limit bracket reset spring 9 and a guide rib 2a.

[0035] The counting gear 5 of this embodiment is directly meshed with the stirring frame gear 4, so that the counting gear 5 can rotate synchronously with the stirring frame gear 4. In other embodiments, the counting gear 5 can also be indirectly meshed with the stirring frame gear 4 through the transmission of other transmission gears, and rotate synchronously with the stirring frame gear 4. In this case, the driving gear is an intermediate transmission gear or other gear that is directly meshed with the counting gear. The following description takes the structure of the stirring frame gear as an example to illustrate the structure of the driving gear. When the driving gear is other gears, the structure adopted can refer to the structure of the stirring frame gear.

[0036] The counting gear 5 of this embodiment is a full-tooth gear, that is, the outer circumferential edge of the counting gear 5 is evenly distributed with meshing teeth connected end to end. The counting gear 5 is arranged on the end wall of the housing 1 through the gear bracket 6. In this embodiment, a first assembly column 1a protruding outward along the axial direction parallel to the stirring frame is arranged on the end wall of the housing 1. The gear bracket 6 is sleeved on the first assembly column 1a and can rotate around the axis (first axis) of the first assembly column 1a. When the gear bracket 6 rotates, the counting gear 5 moves with the gear bracket 6.

[0037] When the gear bracket 6 rotates around the first axis, it can drive the counting gear 5 to move to the meshing position or to the separation position. The meshing position is the position where the counting gear 5 rotates synchronously with the stirring frame gear 4, and the separation position is the position where the counting gear 5 does not rotate with the stirring frame gear 4.

[0038] The counting gear 5 of this embodiment is directly meshed with the stirring frame gear 4. When the gear bracket 6 rotates until the counting gear 5 is in the meshing position, the counting gear 5 and the stirring frame gear 4 are meshed together. At this time, the stirring frame gear 4 can drive the counting gear 5 to rotate synchronously. When the gear bracket 6 rotates until the counting gear 5 is in the separation position, the counting gear 5 and the stirring frame gear 4 are separated from each other (see Fig.10 and Fig.11 ), the stirring frame gear 4 cannot drive the counting gear 5 to rotate synchronously.

[0039] A gear bracket reset spring 7 is provided between the gear bracket 6 and the end wall of the housing 1, and the gear bracket reset spring 7 can provide a force for the gear bracket 6 to move from the disengaged position to the engaged position. The gear bracket reset spring 7 of this embodiment is a torsion spring, and other forms of elastic elements can also be used in other embodiments, as long as they can provide a reset force for the gear bracket 6.

[0040] The gear bracket 6 is provided with a second assembly column 6a, which is parallel to the first assembly column 1a. The counting gear 5 is sleeved on the second assembly column 6a and can rotate around the axis (second axis) of the second assembly column 6a.

[0041] like Figure 4 and Figure 5As shown, a first rib 5a protruding outwardly in the radial direction of the counting gear 5 is provided at the outer end portion of the counting gear 5 (the side of the counting gear 5 away from the end wall of the housing 1 is the outer side). The function of the first rib 5a is to cooperate with the guide rib 2a on the gear end cover 2 to push the counting gear 5 (gear bracket 6) away from the stirring frame gear 4.

[0042] like Figure 6 As shown, a guide rib 2a is provided on the inner wall of the gear end cover 2. The guide rib 2a is a rib protruding from the inner wall of the gear end cover 2. The function of the guide rib 2 is to cooperate with the first rib 5a to make the counting gear 5 leave the stirring frame gear 4. When the counting gear 5 rotates, the first rib 5a will contact the guide rib 2a during the rotation process (see Fig. 9 ), and moves along the guide rib 2a. During the movement of the first rib 5a along the guide rib 2a, the counting gear 5 is pushed outward, so that the gear bracket 6 rotates around the first axis. The gear bracket 6 drives the counting gear 5 disposed thereon to gradually separate from the stirring frame gear 4. Fig.11 shown.

[0043] In this embodiment, the first rib 5a is arranged along the radial direction of the counting gear 5, and the guide rib 2a is arranged on the inner wall of the gear end cover 2, in order to facilitate processing and reduce the interference of components. In other embodiments, the first rib 5a can also be arranged along other directions, and the guide rib 2a can also be arranged on the end wall of the processing box, as long as the counting gear can leave the stirring frame gear through the cooperation of the first rib 5a and the guide rib 2a. The guide rib 2a can be a section of arc rib or a section of inclined surface, and the arc rib can make the movement of the counting gear smoother.

[0044] Continue to refer to Figure 4 and Figure 5 A second rib 5b protruding in a direction parallel to the axis of the counting gear 5 is provided on the inner side of the counting gear 5. The second rib 5b cooperates with the limiting bracket 8 to limit the rotation of the counting gear 5. In other embodiments, the second rib 5b may also protrude in the radial direction of the counting gear 5, as long as it can be blocked by the limiting bracket 8 to achieve limiting.

[0045] The limit bracket 8 can be arranged on the end wall of the shell 1 in a translational manner, and the movement direction of the limit bracket 8 is close to or away from the counting gear 5. A limit bracket reset spring 9 is arranged between the limit bracket 8 and the end wall of the shell 1. The limit bracket 8 can move between the initial position and the limit position. In the initial position, the limit bracket 8 will not limit the counting gear 5. In the limit position, the limit bracket 8 can limit the counting gear 5. The function of the limit bracket reset spring 9 is to provide a force for the limit bracket 8 to reset to the initial position. When the limit bracket 8 is in the initial position, it will not contact the second rib 5b, so it will not limit the rotation of the counting gear 5. When the limit bracket 8 moves forward to the limit position, the front end of the limit bracket 8 will extend forward, and the counting gear 5 will rotate to the second rib 5b due to inertia in the separation position and be blocked by the limit bracket 8, or the gear bracket 6 will reset and rotate to drive the counting gear 5 to move to the second rib 5b and be blocked by the limit bracket 8. The counting gear 5 cannot continue to rotate or move. Fig.12 shown.

[0046] When the limit bracket reset spring 9 pushes the limit bracket 8 backward, the limit bracket 8 moves to the initial position, that is, the limit bracket 8 moves in the direction away from the counting gear 5. When the limit bracket 8 leaves the second rib 5b, the counting gear 5 will no longer be limited. At this time, the gear bracket 6 drives the counting gear 5 to move to the meshing position under the action of the gear bracket reset spring 7. When the gear bracket 6 drives the counting gear 5 to move to the meshing position, the counting gear 5 is not limited by the limit bracket 8, and after re-engaging with the stirring frame gear 4, it rotates synchronously with the stirring frame gear 4.

[0047] As a preferred embodiment, in order to prevent the counting gear 5 from jumping teeth when it returns to the meshing position and re-engages with the stirring frame gear 4, a third rib 5c extending radially along the counting gear 5 is provided on the inner side of the counting gear 5. The function of the third rib 5c is to mesh with the stirring frame gear 4, drive the counting gear to rotate, and prevent the counting gear from jumping teeth.

[0048] like Figure 6As shown, the stirring frame gear 4 (driving gear) has a first tooth portion 4a meshing with the tooth portion of the counting gear 5 and a second tooth portion 4b that can mesh with the third rib 5c. The diameter of the tooth top circle of the first tooth portion 4a is greater than the diameter of the tooth top circle of the second tooth portion 4b. The counting gear 5 mainly rotates synchronously with the stirring frame gear 4 by meshing with the first tooth portion 4a and the tooth portion on the counting gear 5. When the counting gear 5 returns to the meshing position, the third rib 5c on the counting gear 5 can mesh with the second tooth portion 4b on the stirring frame gear 4, and the second tooth portion 4b drives the counting gear 5 to rotate through the meshing with the third rib 5c. When the counting gear 5 and the first tooth portion 4a of the stirring frame gear 4 are meshed together, the counting gear is driven to rotate synchronously through the meshing of the first tooth portion 4a and the counting gear 5, so as to avoid tooth skipping between the counting gear 5 and the stirring frame gear.

[0049] In order to prevent the gear bracket 6 from moving too much when resetting to the meshing position, causing the stirring frame gear 4 and the counting gear 5 to mesh too tightly, such as Figure 1 and Fig.12 As shown, a limiting portion 6b is provided on the gear bracket 6, and a limiting protrusion 1b is provided on the end wall of the housing 1 (processing box). When the gear bracket 6 is reset to the meshing position under the action of the gear bracket reset spring 7, the limiting protrusion 1b can block the limiting portion 6b, so that the gear bracket 6 cannot rotate beyond the meshing position, ensuring that the stirring frame gear 4 and the counting gear 5 are in the right meshing position and will not be too close to affect the transmission.

[0050] The following describes the use of the processing box installation machine and the reset process of the counting gear in this embodiment in conjunction with the accompanying drawings. In the following description, the image forming device is described as a printer.

[0051] like Figure 7 As shown, after the process cartridge is loaded into the printer and the printer front cover 100 is closed, the printer front cover 100 will push the limit bracket 8 forward to the limit position, and when the limit bracket 8 is in the initial position, the front end of the limit bracket 8 will not extend forward to the position where it can contact the second rib 5b, and will not limit the rotation / movement of the counting gear 5; when the printer front cover 100 is closed, the printer front cover 100 will push the limit bracket 8 forward, and the limit bracket reset spring 9 will be squeezed when the limit bracket 8 moves forward; at this time, the counting gear 5 is in the meshing position, that is, it can be meshed with the stirring frame gear 4;

[0052] When the printer is started, the stirring frame gear 4 receives the rotational driving force from the printer and rotates, and drives the counting gear 5 to rotate synchronously. Figure 2 As shown; after the counting gear 5 rotates, it can cooperate with the detection mechanism on the printer to realize the identification of the process cartridge and reset the preset life value of the printer;

[0053] When the counting gear 5 rotates until the first rib 5a contacts the guide rib 2a on the inner wall of the gear end cover 2, the process of separating the counting gear 5 and the stirring frame gear 4 is started. Figure 8 and Fig. 9 As shown, with the help of the shape of the guide rib 2a, the first rib 5a contacts the guide rib 2a and moves along the guide rib 2a, which will gradually push the counting gear 5 away from the stirring frame gear 4. Since the counting gear 5 is installed on the gear bracket 6 that can rotate around the first axis, the gear bracket 6 rotates around the first axis and drives the counting gear 5 to leave the stirring frame gear 4 and separate from the stirring frame gear 4, as shown in FIG. Fig.10 and Fig.11 As shown, after separation, the counting gear 5 no longer rotates with the stirring frame gear 4, which will not affect the recognition of the detection device inside the printer, and the processing box can be used normally; even if the counting gear 5 rotates due to inertia after separation from the stirring frame gear 4, the limiting bracket 8 will also clamp the second rib 5b, limiting the counting gear 5 from continuing to rotate, such as Fig.12 As shown;

[0054] When the number of pages printed by the printer reaches the preset life value, indicating that the developer in the process box has been consumed, the front cover 100 of the printer is opened, and the printer is turned on. Fig.14 As shown, the printer front cover 100 no longer presses the limit bracket 8, and the limit bracket 8 retreats and moves away from the counting gear 5 under the action of the limit bracket reset spring 9. After the limit bracket 8 leaves the second rib 5b, the counting gear 5 and the gear bracket 6 are no longer limited, and the gear bracket 6 moves to the meshing position with the counting gear 5 under the action of the gear bracket reset spring 7, thereby realizing the reset of the counting gear; the processing box is taken out and reinstalled, and after the stirring frame gear 4 drives the counting gear 5 to rotate and is recognized by the detection mechanism of the printer, the printer resets the preset life value, and the remaining developer in the powder bin can continue to be used, and will not be limited by the standard capacity and unable to use the remaining developer, causing waste.

[0055] If the number of pages printed by the printer reaches the preset life value again, indicating that the developer in the processing box has been consumed, the above process can be repeated until the developer in the processing box is completely consumed.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A counting gear assembly, used in a processing box, wherein the processing box comprises a housing and a driving gear disposed on an end wall of the housing; It is characterized in that include: A gear support rotatably disposed on the end wall of the housing about a first axis; A counting gear with a full tooth structure rotatably arranged on the gear bracket around a second axis, wherein the counting gear is provided with a first rib and a second rib; when the gear bracket rotates, the counting gear is driven to move between a meshing position and a disengagement position, wherein the counting gear is meshed with the driving gear at the meshing position, and the counting gear is disengaged from the driving gear at the disengagement position; A guide rib, wherein the first rib can contact the guide rib and move along the guide rib during the rotation of the counting gear, so that the counting gear moves toward the separation position; a gear bracket return spring for moving the gear bracket from the disengaged position to the engaged position; A limiting bracket, wherein the limiting bracket can move between an initial position and a limiting position, and when the limiting bracket moves to the limiting position, the limiting bracket can contact the second rib and limit the counting gear; A limit bracket return spring enables the limit bracket to move from the limit position to the initial position.

2. The counting gear assembly according to claim 1, characterized in that: The driving gear is a stirring frame gear arranged at the end of the stirring frame.

3. The counting gear assembly according to claim 2, characterized in that: The counting gear is provided with a third rib extending radially along the counting gear, and the driving gear includes a first tooth portion meshing with the tooth portion of the counting gear and a second tooth portion meshing with the third rib; in the meshing position, the third rib can mesh with the second tooth portion.

4. The counting gear assembly according to claim 3, characterized in that: The diameter of the addendum circle of the first tooth portion is greater than the diameter of the addendum circle of the second tooth portion.

5. The counting gear assembly according to claim 2, characterized in that: The outer end of the counting gear is provided with the first rib protruding outward in the radial direction of the counting gear, and the inner side of the counting gear is provided with the second rib protruding in the direction parallel to the axis of the counting gear; The guide ribs are arranged on the inner wall of the gear end cover of the processing box.

6. The counting gear assembly according to claim 1, characterized in that: A limiting portion is arranged on the gear bracket, and a limiting protrusion is arranged on the end wall of the processing box; when the gear bracket moves to the meshing position, the limiting portion is blocked by the limiting protrusion, so that the gear bracket cannot exceed the meshing position.

7. A processing box, comprising a housing and a gear end cover arranged at the end of the housing, wherein the housing comprises a powder bin for accommodating a developer, and a stirring frame is arranged in the powder bin; characterized in that: It also includes a counting gear assembly as described in any one of claims 1 to 6, wherein the driving gear and the counting gear are located outside the housing and are arranged at the same side end of the housing and are covered by the gear end cover.

8. The process cartridge according to claim 7, wherein: The end wall of the shell is provided with a first assembly column protruding outward in an axial direction parallel to the stirring frame, the gear bracket is sleeved on the first assembly column, and the axis of the first assembly column is a first axis; The gear bracket is provided with a second assembly column parallel to the first assembly column, the counting gear is sleeved on the second assembly column, and the axis of the second assembly column is the second axis.

9. The process cartridge according to claim 8, wherein: The guide ribs are arc-shaped ribs.

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