Processing box

Abstract

The utility model relates to a process cartridge detachably mounted in imaging equipment, which comprises a developing device frame used for accommodating a developing agent; the developing roller is rotatably arranged in the developing device frame and is used for carrying a developing agent; the powder feeding roller is rotatably arranged in the developing device frame and is used for conveying a developing agent to the developing roller; the first driving receiving part is connected with one end of the powder feeding roller and is used for receiving driving force from the imaging equipment; the driving force transmission assembly is arranged opposite to the first driving receiving part and is used for transmitting the driving force received by the first driving receiving part to the developing roller; wherein the speed of the surface of the powder feeding roller is not greater than that of the surface of the developing roller, so that the abrasion of the powder feeding roller is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electronic photographic imaging, in particular to a processing box which can be detachably installed in an electronic photographic imaging device. Background Art

[0002] Figure 1 It is a side view observed along the length direction of the existing process box, the process box 70 includes a developing unit 4 and a drum unit 26 connected to each other, wherein the developing unit 4 includes a developing device frame 31, a developing roller 25, a powder feeding roller 34, a stirring frame 36 and a powder discharge knife 35, the developing device frame 31 is used to accommodate the developer, the developing roller 25, the powder feeding roller 34 and the stirring frame 36 are all rotatably arranged in the developing device frame 31, the stirring frame 36 is used to stir the developer and transport the developer toward the powder feeding roller 34, the powder feeding roller 34 is in contact with the developing roller 25, and as the powder feeding roller 34 rotates, the developer is transported To the surface of the developing roller 25, the powder knife 35 is fixedly installed in the developing device frame 31 and contacts with the developing roller 25, and is used to adjust the developer thickness on the surface of the developing roller 25; the drum unit 26 includes a cleaning frame 27, a charging roller 2, a photosensitive drum 1 and a cleaning component 6, the charging roller 2 and the photosensitive drum 1 are both rotatably arranged in the cleaning frame 27, the charging roller 2 contacts with the photosensitive drum 1, and the charging roller 2 is used to charge the surface of the photosensitive drum 1, when the processing box 70 is developing, the developing roller 25 supplies the developer carried on its surface to the photosensitive drum 1, and the cleaning component 6 is used to remove the residual developer on the surface of the photosensitive drum 1.

[0003] Generally, the powder feeding roller 34 includes a powder feeding roller shaft 34j and a sponge portion 34a coated on the surface of the powder feeding roller shaft 34j. After the developing roller 25 supplies the developer to the photosensitive drum 1, the sponge portion 34a peels off the developer remaining on the surface of the developing roller 25 to improve the imaging quality of the processing box 70. To this end, the surface speed of the powder feeding roller 34 in the existing processing box is greater than the surface speed of the developing roller 25.

[0004] The applicant found in actual tests that if the powder feeding roller 34 rotates too fast, the wear of the sponge portion 34a may increase, thereby reducing the performance of the powder feeding roller 34 in conveying the developer to the surface of the developing roller 25 and the performance of stripping the developer from the surface of the developing roller 25. Utility Model Content

[0005] To this end, the processing box involved in the utility model adopts the following technical solutions to solve the above technical problems, specifically:

[0006] A processing box is detachably installed in an imaging device, and the processing box includes a developing device frame for accommodating a developer; a developing roller is rotatably arranged in the developing device frame for carrying the developer; a powder feeding roller is rotatably arranged in the developing device frame for feeding the developer to the developing roller; a first drive receiving part is connected to one end of the powder feeding roller and is used to receive a driving force from the imaging device; a driving force transmission assembly is arranged opposite to the first drive receiving part and is used to transmit the driving force received by the first drive receiving part to the developing roller; wherein the surface speed of the powder feeding roller is not greater than the surface speed of the developing roller.

[0007] In some embodiments, the diameter of the developer roller is the same as the diameter of the powder feed roller.

[0008] In some embodiments, the diameter of the developing roller and the diameter of the powder feeding roller are both 12 mm.

[0009] In some embodiments, the developing roller includes a developing roller shaft and a developing layer coated on the surface of the developing roller shaft, the powder feeding roller includes a powder feeding roller shaft and a sponge portion coated on the surface of the powder feeding roller shaft, the sponge portion is used to transport the developer to the developing layer and peel off the residual developer on the surface of the developing roller; the driving force transmission assembly includes a first gear and a second gear, the first gear is connected to the powder feeding roller shaft, the second gear is connected to the developing roller shaft, the first gear and the second gear are meshed, and the number of teeth of the first gear is greater than the number of teeth of the second gear.

[0010] In some embodiments, the number of teeth on the first gear is 23, and the number of teeth on the second gear is 21.

[0011] In some embodiments, the ratio of the speed of the surface of the developer roller to the speed of the surface of the powder feed roller is 1.09.

[0012] In some embodiments, the developing roller includes a developing roller shaft and a developing layer coated on the surface of the developing roller shaft, the powder feeding roller includes a powder feeding roller shaft and a sponge portion coated on the surface of the powder feeding roller shaft, the sponge portion is used to transport the developer to the developing layer and peel off the residual developer on the surface of the developing roller; the driving force transmission assembly includes a first gear, a second gear and an intermediate gear, the first gear is connected to the powder feeding roller shaft, the second gear is connected to the developing roller shaft, and the first gear and the second gear are meshed through at least one intermediate gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a side view observed along the length direction of the conventional process box.

[0014] Figure 2 and Figure 3 It is a three-dimensional diagram of some components in the processing box involved in the utility model. DETAILED DESCRIPTION

[0015] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0016] Figure 2 and Figure 3 It is a stereoscopic diagram of some components of the processing box involved in the utility model. For the sake of ease of understanding, in the processing box described below, the same structure as the background technology will be directly quoted, and the same components as the background technology will be numbered the same.

[0017] First continue to refer to Figure 1 Describe the specific structure of the process box 70, which can be detachably mounted to the image forming device, and the process box 70 will be Figure 1 The posture shown is installed to the imaging device, and the gravity direction G is downward. At this time, the photosensitive drum 1 is located above the processing box 70; the developing device frame 31 includes a developer accommodating portion 31c and a developing chamber 31b distributed in the up and down directions, and a partition wall 31d is arranged therebetween. At the same time, the partition wall 31d is provided with an opening 31e, and the developer accommodating portion 31c and the developing chamber 31b are connected through the opening 31e, and the developing chamber 31b is located above the developer accommodating portion 31c.

[0018] The stirring frame 36 is rotatably arranged in the developer accommodating portion 31c, and the powder feeding roller 34 and the developing roller 25 are rotatably arranged in the developing chamber 31b. The stirring frame 36 stirs the developer and transports the developer to the developing chamber 31b through the opening 31e. The powder feeding roller 34 and the developing roller 25 are in contact with each other, so that the powder feeding roller 34 can transport the developer in the developing chamber 31b to the developing roller 25; the developing roller 25 includes a developing roller shaft 25j and a developing layer 25a coated on the surface of the developing roller shaft 25j, the sponge portion 34a is used to transport the developer to the developing layer 25a, and the developing layer 25a is used to carry the developer.

[0019] like Figure 2 As shown, the processing box 70 also includes a first drive receiving portion 23 and a second drive receiving portion 16. The first drive receiving portion 23 is arranged at the end of the powder feeding roller 34 and is connected to one end of the powder feeding roller 34. Specifically, the first drive receiving portion 23 is connected to the powder feeding roller shaft 34j, and the second drive receiving portion 16 is arranged at the end of the photosensitive drum 1. When the processing box 70 is developed in the imaging device, the first drive receiving portion 23 and the second drive receiving portion 16 respectively receive driving force from the imaging device, so that the powder feeding roller 34 and the photosensitive drum 1 can be driven respectively; further, the processing box 70 also includes a driving force transmission component 200 arranged opposite to the first drive receiving portion 23, as shown in FIG. Figure 3As shown, the driving force transmission component 200 includes a first transmission member 201, a second transmission member 202 and a third transmission member 203. The first transmission member 201 is connected to the powder feeding roller shaft 34j, the second transmission member 202 is connected to the developing roller shaft 25j, and the third transmission member 203 is connected to the stirring frame 36. When the first transmission member 201, the second transmission member 202 and the third transmission member 203 are combined with each other, the driving force received by the first drive receiving part 23 can be transmitted to the developing roller 25 and the stirring frame 36. Finally, the developing roller 25, the powder feeding roller 34 and the stirring frame 36 are all driven.

[0020] In some embodiments, the driving force transmission component 200 also includes at least one of a first intermediate transmission component 204 and a second intermediate transmission component 205. In particular, when the stirring frame 36 is arranged away from the developing roller 25 / the powder feeding roller 34, the driving force of the first drive receiving part 23 is transmitted to at least one of the first intermediate transmission component 204 and the second intermediate transmission component 205 through the first transmission component 201, and then transmitted to the third transmission component 203 by at least one of the first intermediate transmission component 204 and the second intermediate transmission component 205; based on this concept, the number of intermediate transmission components in the driving force transmission component 200 can be even greater to ensure that the stirring frame 36 can stably receive the driving force.

[0021] For ease of description, the extension direction of the developing roller 25 / powder feeding roller 34 / stirring frame 36 / photosensitive drum 1 is defined as the longitudinal direction, the side where the first drive receiving portion 23 is located is the right side of the processing box 70, and the side where the driving force transmission assembly 200 is located is the left side of the processing box 70.

[0022] In the present invention, the surface speed of the powder feeding roller 34 is set to be no greater than the surface speed of the developing roller 25 to reduce the wear of the powder feeding roller 34 / sponge portion 34a. For ease of understanding, the above-mentioned transmission members are all taken as gears as an example, and the following schemes can be specifically adopted:

[0023] Option 1, by adjusting the tooth ratio of the first transmission member / first gear 201 and the second transmission member / second gear 202, the number of teeth of the first gear 201 is greater than the number of teeth of the second gear 202. Preferably, the number of teeth of the first gear 201 is 23, and the number of teeth of the second gear 202 is 21. At the same time, the diameter ratio of the developing roller 25 and the powder feeding roller 34 is adjusted. In a preferred embodiment, the diameters of the developing roller 25 and the powder feeding roller 34 are both set to 12 mm. Finally, the speed ratio of the surface of the developing roller 25 to the surface of the powder feeding roller 34 is 1.09.

[0024] Solution 2: The first gear 201 and the second gear 202 are not directly meshed (a way of combining), but the speed is converted through at least one intermediate gear, and then the second gear 202 is driven by the intermediate gear. The specific design can be based on the rotation speed requirement of the developing roller 25, that is, the first gear 201 and the second gear 202 are meshed through at least one intermediate gear.

[0025] As described above, the powder feeding roller 34 also has the function of stripping the residual developer on the surface of the developing roller 25. When the speed of the surface of the powder feeding roller 34 is reduced, the stripping effect may be reduced. For this reason, under the above-mentioned inventive concept, the pore size, density or material of the sponge portion 34a in the powder feeding roller 34 involved in the utility model can also be adjusted according to design requirements to enhance the strength of the powder feeding roller 34 in stripping the residual developer on the surface of the developing roller 25, or, the roughness of the surface of the developing roller 25 can be adjusted to make the residual developer less likely to be adsorbed on the surface of the developing roller 25, for example, by reducing the roughness of the surface of the developing roller 25, so that even if the speed of the surface of the powder feeding roller 34 is reduced, the residual developer on the surface of the developing roller 25 is more easily stripped by the powder feeding roller 34.

[0026] In the above description, the processing box 70 includes both the developing unit 4 and the drum unit 26, which can be called an integrated processing box. According to the inventive concept of the present utility model, the above technical solution can also be applied to a product called a split processing box, in which the processing box 70 will only include the developing unit 4, and the drum unit 26 can be pre-installed to the imaging device, or the developing unit 4 and the drum unit 26 are first combined in a detachable manner to form a combination, and then the combination is detachably installed to the imaging device.

Claims

1. A process cartridge, detachably mounted in an image forming apparatus, characterized in that: Processing box includes: A developing device frame for accommodating a developer; A developing roller is rotatably disposed in the developing device frame and is used for carrying a developer; A powder feeding roller is rotatably arranged in the developing device frame and is used for feeding the developer to the developing roller; A first drive receiving portion connected to one end of the powder feeding roller and used to receive a driving force from the imaging device; A driving force transmission assembly, arranged opposite to the first driving receiving portion, and used for transmitting the driving force received by the first driving receiving portion to the developing roller; The surface speed of the powder feeding roller is not greater than the surface speed of the developing roller.

2. The process cartridge according to claim 1, wherein: The diameter of the developing roller is the same as the diameter of the powder feeding roller.

3. The process cartridge according to claim 2, wherein: The diameter of the developing roller and the diameter of the powder feeding roller are both 12mm.

4. The process cartridge according to any one of claims 1 to 3, characterized in that: The developing roller comprises a developing roller shaft and a developing layer coated on the surface of the developing roller shaft, and the powder feeding roller comprises a powder feeding roller shaft and a sponge portion coated on the surface of the powder feeding roller shaft, wherein the sponge portion is used to transport the developer to the developing layer and peel off the residual developer on the surface of the developing roller; The driving force transmission component includes a first gear and a second gear, the first gear is connected to the powder feeding roller shaft, the second gear is connected to the developing roller shaft, the first gear and the second gear are meshed, and the number of teeth of the first gear is greater than the number of teeth of the second gear.

5. The process cartridge according to claim 4, wherein: The number of teeth of the first gear is 23, and the number of teeth of the second gear is 21.

6. The process cartridge according to claim 4, wherein: The ratio of the speed of the surface of the developer roller to the speed of the surface of the powder feed roller was 1.

09.

7. The process cartridge according to any one of claims 1 to 3, characterized in that: The developing roller comprises a developing roller shaft and a developing layer coated on the surface of the developing roller shaft, and the powder feeding roller comprises a powder feeding roller shaft and a sponge portion coated on the surface of the powder feeding roller shaft, wherein the sponge portion is used to transport the developer to the developing layer and peel off the residual developer on the surface of the developing roller; The driving force transmission component includes a first gear, a second gear and an intermediate gear, wherein the first gear is connected to the powder feeding roller shaft, the second gear is connected to the developing roller shaft, and the first gear and the second gear are meshed through at least one intermediate gear.

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