Processing box

Abstract

The processing box at least comprises a powder bin for accommodating a developing agent, a stirring frame rotatably arranged in the powder bin, and a driving gear for receiving rotary driving force from image forming equipment, a stirring frame gear is arranged at the end part of the stirring frame; the driving gear is provided with a tooth part meshed with the stirring frame gear, and the minimum meshing distance between the tooth part and the stirring frame gear is 7.5 mm. The driving gear and the stirring frame gear are directly meshed, the driving gear does not drive the stirring frame gear to rotate through other intermediate transmission gears any more, the transmission ratio is increased, the rotating speed of the stirring frame is increased, the requirement for high-speed printing is met, and the printing quality is guaranteed. As an intermediate transmission gear is omitted, the space of the powder bin is equivalently increased, and the capacity of the developing agent can be increased; and meanwhile, the number of parts is reduced, the material cost is reduced, and the assembly process is simplified.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic imaging photography, and particularly relates to a processing cartridge used in an image forming apparatus. Background Art

[0002] A processing cartridge is a cartridge detachably loaded into a main body of an image forming apparatus. The processing cartridge includes a cartridge body having a powder chamber for accommodating a developer. A rotatable stirring frame is provided in the powder chamber. When the stirring frame rotates, the blades on the stirring frame rotate with the stirring frame to stir and convey the developer. The rotation of the existing stirring frame of the processing cartridge is realized by meshing a stirring frame gear provided at an end of the stirring frame with other transmission gears to transmit the rotational driving force. The driving gear usually transmits the rotational force to the stirring frame gear through multiple gears. More commonly, the rotational driving force is transmitted through two intermediate transmission gears. As shown in FIG., a stirring frame gear 101, a first transmission gear 102, a second transmission gear 103, and a driving gear 104 are provided at one end of a cartridge body 100. The stirring frame gear 101 is provided at an end of a stirring frame 105. When the stirring frame gear 101 rotates, it can drive the stirring frame 105 to rotate. The driving gear 104 meshes with the first transmission gear 102, the first transmission gear 102 meshes with the second transmission gear 103, and the second transmission gear 103 meshes with the stirring frame gear 101. Through multiple gears, the rotational force is transmitted to the stirring frame gear 101, the rotation of the stirring frame gear 101 is realized, and then the stirring frame is driven to work. This method has a large number of components, low transmission efficiency, and large assembly errors during assembly of multiple components, which will affect the printing quality. Figure 1 As shown in FIG., a stirring frame gear 101, a first transmission gear 102, a second transmission gear 103, and a driving gear 104 are provided at one end of a cartridge body 100. The stirring frame gear 101 is provided at an end of a stirring frame 105. When the stirring frame gear 101 rotates, it can drive the stirring frame 105 to rotate. The driving gear 104 meshes with the first transmission gear 102, the first transmission gear 102 meshes with the second transmission gear 103, and the second transmission gear 103 meshes with the stirring frame gear 101. Through multiple gears, the rotational force is transmitted to the stirring frame gear 101, the rotation of the stirring frame gear 101 is realized, and then the stirring frame is driven to work. This method has a large number of components, low transmission efficiency, and large assembly errors during assembly of multiple components, which will affect the printing quality. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a processing cartridge with a simple transmission structure and good printing effect.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solution:

[0005] A processing cartridge includes at least: a powder chamber for accommodating a developer, a stirring frame rotatably provided in the powder chamber, and a driving gear for receiving a rotational driving force from an image forming apparatus; a stirring frame gear is provided at an end of the stirring frame; the driving gear has a tooth portion meshing with the stirring frame gear, and the minimum meshing distance between the tooth portion and the stirring frame gear is 7.5 mm.

[0006] For the processing cartridge as described above, optionally, the maximum meshing distance between the tooth portion and the stirring frame gear is 19 mm.

[0007] For the processing cartridge as described above, optionally, the stirring frame gear is a spur gear, and the tooth portion of the driving gear is a straight tooth.

[0008] For the processing cartridge as described above, optionally, the transmission ratio between the driving gear and the stirring frame gear is greater than or equal to 0.3.

[0009] For the processing cartridge as described above, optionally, the number of teeth of the tooth part and the stirring frame gear are correspondingly 7 teeth and 23 teeth.

[0010] For the processing cartridge as described above, optionally, the number of teeth of the tooth part and the stirring frame gear are correspondingly 22 teeth and 55 teeth.

[0011] As can be seen from the above technical solutions, in the present utility model, the driving gear and the stirring frame gear are directly meshed, and the driving gear no longer drives the stirring frame gear to rotate through other intermediate transmission gears, increasing the transmission ratio, improving the rotation speed of the stirring frame, meeting the requirements of high-speed printing, and ensuring the printing quality. Moreover, since the intermediate transmission gear is omitted, it is equivalent to increasing the space of the powder cartridge, which can increase the capacity of the developer; at the same time, the number of parts is reduced, the material cost is lowered, and the assembly process is also simplified. Description of the Drawings

[0012] In order to more clearly illustrate the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a schematic diagram of the transmission structure of the stirring frame gear of the existing processing cartridge;

[0014] Figure 2 It is an exploded schematic diagram of the transmission structure of the stirring frame of the processing cartridge according to the embodiment of the present utility model;

[0015] Figure 3 It is a schematic diagram of the installation of the stirring frame gear of the processing cartridge according to the embodiment of the present utility model at the end of the processing cartridge.

[0016] The following will further describe in detail the specific embodiments of the present utility model with reference to the drawings. Specific Embodiments

[0017] The present utility model will be described in detail below with reference to the accompanying drawings. When describing the embodiments of the present utility model in detail, for the convenience of explanation, the drawings showing the device structure will be enlarged locally in a non-general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model here. It should be noted that the drawings are in a simplified form and all use non-precise proportions, only for the purpose of conveniently and clearly assisting in explaining the embodiments of the present utility model. At the same time, in the description of the present application, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features; terms such as "front", "back", "bottom", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0018] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" 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 directly connected, or indirectly connected through an intermediate medium, and can also be the communication inside two elements. It can be a wireless connection or a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0019] An image forming apparatus generally includes a main body and a processing cartridge detachably installed in the main body. The processing cartridge supplies a developer to a developing unit to develop an electrostatic latent image formed on a photosensitive device in the developing unit to form a visible image on a medium such as paper. The processing cartridge at least includes a powder hopper 1 for accommodating the developer. A stirring frame 2 is provided in the powder hopper 1, and stirring blades 3 are provided on the stirring frame 2. When the stirring frame 2 rotates, the stirring blades 3 are driven to rotate together, and the developer is stirred and conveyed by the stirring blades 3.

[0020] For the rotating components in the processing cartridge, such as the stirring frame and the developing roller, the transmission of the rotational driving force is achieved through gears. The various transmission gears of the processing cartridge are usually located on one side in the length direction of the processing cartridge and outside the upper sidewall in the length direction of the processing cartridge. A stirring frame gear 4 for driving the stirring frame 2 to rotate is provided at the end of the stirring frame 2. The stirring frame 2 is rotatably provided in the powder hopper 1 around its own axis, and one end of the stirring frame 2 extends out of the sidewall of the powder hopper 1 (processing cartridge). The stirring frame gear 4 is provided at the end of the stirring frame 2 extending out of the powder hopper 1 and is located outside the powder hopper 1 (processing cartridge).

[0021] The drive gear 5 and the agitator gear 4 are arranged on the same side, and the drive gear 5 is rotatably arranged on the outer wall of the processing cartridge. When the processing cartridge is installed on the image forming apparatus, the drive gear 5 cooperates with the rotary drive member on the image forming apparatus, and the rotary drive member can drive the drive gear 5 to rotate. The drive gear 5 has a tooth portion 5-1 meshing with the agitator gear 4 and a tooth portion (not labeled) meshing with other gears. In the present utility model, the drive gear 5 is directly meshed with the agitator gear 4, and the rotation of the agitator gear 4 is no longer driven by the multi-stage transmission of other intermediate transmission gears, reducing the number of parts, lowering the material cost of the product, and simplifying the assembly process. In addition, since the intermediate transmission gear is omitted, the space originally occupied by the intermediate transmission gear can be converted into the space in the powder cartridge, increasing the capacity of the powder cartridge, so that more developer can be accommodated. In this embodiment, the drive gear 5 also drives a developing roller gear (not shown).

[0022] In this embodiment, the number of teeth of the tooth portion 5-1 of the drive gear 5 is 12, the number of teeth of the agitator gear 4 is 36, and the transmission ratio is 0.333. Compared with the transmission structure in which the drive gear is transmitted through two intermediate gears, the transmission ratio is larger, and the rotation speed of the agitator 2 is faster, which can ensure sufficient powder supply and adapt to the faster printing speed of the printer. When the drive gear is transmitted through two intermediate transmission gears, the transmission ratio between the drive gear and the agitator gear is less than 0.2 (about 0.15), and the rotation speed of the agitator is relatively slow, which cannot keep up with the conveying requirement of the developer during high-speed printing. If the developer conveying amount is insufficient, the printed color will be light and unclear. However, in this application, the intermediate transmission gear is cancelled between the drive gear and the agitator gear, the transmission ratio is increased, and the rotation speed of the agitator is faster, which can provide more developer, meet the requirement of high-speed printing, and ensure the printing effect during high-speed printing.

[0023] Optionally, the tooth part 5-1 of the driving gear 5 in this embodiment is a straight tooth, and the stirring frame gear 4 is also a straight gear. Further, the minimum meshing distance between the tooth part 5-1 of the driving gear 5 and the stirring frame gear 4 (the meshing distance between the tooth part 5-1 of the driving gear 5 and the stirring frame gear 4 described in the present utility model refers to the distance between the central axis of the driving gear and the central axis of the stirring frame gear) is 7.5 mm. For example, the tooth part 5-1 of the driving gear 5 is provided with 7 teeth, and the stirring frame gear 4 is provided with 23 teeth; the transmission ratio is 0.304. In addition, under the condition of ensuring the minimum distance of 7.5 mm, the number of teeth of the tooth part 5-1 and the stirring frame gear 4 can also be adjusted as long as the transmission ratio between the two is greater than or equal to 0.3. The meshing distance between the tooth part 5-1 of the driving gear 5 and the stirring frame gear 4 should be greater than or equal to 7.5 mm to ensure that the stirring frame 2 will not interfere with the powder bin body, so as to achieve stable conveyance of the developer by the stirring frame. At the same time, based on the model of the printer and the space limitation of the printer, the processing cartridge cannot be infinitely large. On the premise of comprehensively considering the powder loading amount (powder cartridge space) and the printer space, the maximum meshing distance between the tooth part 5-1 of the driving gear 5 and the stirring frame gear 4 is 19 mm. For example, the tooth part 5-1 of the driving gear 5 is provided with 22 teeth, and the stirring frame gear 4 is provided with 55 teeth; the transmission ratio is 0.4. Similarly, under the condition of ensuring the maximum meshing distance of 19 mm, the number of teeth of the tooth part 5-1 and the stirring frame gear 4 can also be adjusted as long as the transmission ratio between the two is greater than or equal to 0.3. Correspondingly, when adjusting the meshing distance between the tooth part 5-1 of the driving gear 5 and the stirring frame gear 4, in order to realize the spatial structure, the size of the corresponding stirring frame blade is also correspondingly reduced or increased.

[0024] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A processing cartridge, comprising at least: A toner cartridge for accommodating toner, a stirring frame rotatably disposed in the toner cartridge, and a drive gear for receiving a rotational driving force from an image forming apparatus; a stirring frame gear is provided at an end of the stirring frame; It is characterized in that: The drive gear has a tooth portion meshing with the stirring frame gear, and a minimum meshing distance between the tooth portion and the stirring frame gear is 7.5 mm.

2. The processing cartridge according to claim 1, wherein: A maximum meshing distance between the tooth portion and the stirring frame gear is 19 mm.

3. The processing cartridge according to claim 1, wherein: The stirring frame gear is a spur gear, and the tooth portion of the drive gear is a straight tooth.

4. The processing cartridge according to claim 1, wherein: A transmission ratio between the tooth portion and the stirring frame gear is greater than or equal to 0.

3.

5. The processing cartridge according to claim 4, characterized in that: The number of teeth of the tooth portion and the stirring frame gear corresponds to 7 teeth and 23 teeth respectively.

6. The processing cartridge according to claim 4, wherein: The number of teeth of the tooth portion and the stirring frame gear corresponds to 22 teeth and 55 teeth respectively.

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