A process cartridge and an image forming apparatus

Abstract

The utility model provides processing box and image forming device, including box body, photosensitive drum, it rotatablely sets up on the box body, separate component, it is used for separating and conveying paper on photosensitive drum, at least two separate components install on the box body, guide part, it is used for guiding paper, the guide part sets up in one side of separate component. The processing box and image forming device of the utility model, through the cooperation of separate component and guide part, can separate and convey various paper type paper smoothly, avoid the appearance of paper jam, improve user experience.

Description

Technical Field

[0001] This utility model relates to the field of electronic imaging equipment, specifically to a processing box and an image forming apparatus. Background Technology

[0002] In conventional image forming apparatuses, during electrophotographic image forming, a toner image is formed on a photosensitive drum based on the image or image information of the original document. The toner image formed on the photosensitive drum is electrostatically transferred onto paper by a transfer roller. After the paper with the toner image transferred is separated from the surface of the photosensitive drum by a separation claw, it is fixed by a fuser to form an image.

[0003] To prevent paper from getting caught in the processing tray and causing a paper jam, three separation claws are typically installed on the tray to separate the paper. These three claws are spaced a certain distance apart. If the distance between the claws is too large, the claws at both ends will be unable to handle smaller ends of the paper, such as A5 paper; if the distance is too small, it will be difficult to stably handle larger ends of the paper, such as A3 paper. This can cause paper misalignment or paper jams, reducing user experience and affecting image quality. Utility Model Content

[0004] In order to solve the above-mentioned technical problems in the prior art, the present invention provides a processing box and an image forming device, which solves the problem of paper shifting or paper jam caused by the distance between the separating claws being too large or too small.

[0005] The objective of this utility model is achieved through the following solution:

[0006] A processing box, comprising:

[0007] Box body;

[0008] A photosensitive drum, which is rotatably mounted on the housing;

[0009] A separation assembly for separating paper conveyed on the photosensitive drum, at least two of the separation assemblies are mounted on the housing;

[0010] A guide component for guiding the paper is disposed on one side of the separation assembly.

[0011] In the processing box described above, the guide member is perpendicular to the axis of the photosensitive drum in the paper conveying direction.

[0012] In the processing box described above, the guide component is a plate-shaped protrusion.

[0013] The processing box described above has two guide components.

[0014] As described above, the guide component of the processing box is capable of guiding A4 paper types fed from the short side, A5 paper types fed from the long side, and letter paper types.

[0015] As described above, the processing box has three separation components, which are equidistantly mounted on the box body.

[0016] As described above, in the processing box, the separation component includes a separation claw. During the paper conveying process, the paper first passes through the tip of the separation claw and then through the guide component.

[0017] In the processing box described above, the guide member is disposed between two adjacent separating components, and when the paper is guided by the guide member, the separating component is higher than the guide member in a direction orthogonal to the paper surface.

[0018] As described above, in the processing box, the separation component is mounted on the box body by snaps or screws.

[0019] A printing apparatus is also provided, comprising the processing cartridge described in any of the preceding claims.

[0020] This invention provides a guide component on one side of the separation component. Through the cooperation of the separation component and the guide component, various types of paper can be smoothly conveyed and separated, avoiding paper jams and improving the user experience. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the processing box in this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the separating component in this utility model;

[0024] Figure 3 This is a front view of the processing box in this utility model.

[0025] Figure 4 yes Figure 3 Cross-sectional view. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] As described in the background section, the paper with the toner image transferred onto it is separated from the surface of the photosensitive drum by separation claws. To prevent the paper from being wound into the processing cartridge and causing a paper jam, three separation claws are typically installed on the processing cartridge to separate the paper, and these three separation claws are spaced a certain distance apart. The inventors have discovered that if the distance between the separation claws is too large, the separation claws at both ends may be unable to transport the smaller ends of the paper, such as A5 paper; if the distance between the separation claws is too small, it is difficult to stably transport larger paper, such as A3 paper. This can cause paper misalignment or paper jams, reducing the user experience.

[0029] To address the aforementioned problems, this utility model provides a processing box and an image forming apparatus. The processing box includes a box body, a photosensitive drum, separation components, and a guide component. The photosensitive drum is rotatably mounted on the box body. The separation components separate the paper conveyed on the photosensitive drum, and at least two separation components are mounted on the box body. The guide component guides the paper and is disposed on one side of the separation components. Through the cooperation of the separation components and the guide component, various paper types can be smoothly conveyed and separated, avoiding paper jams and improving the user experience.

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0031] like Figure 1 and Figure 3As shown, this embodiment of the present invention provides a processing box 1, including a box body 2, a photosensitive drum 3, a separation assembly 4, a charging roller, a cleaning roller, a static elimination section, a developing assembly (not shown), a waste toner hopper, and a waste toner discharge screw 6, etc. The photosensitive drum 3 is rotatably mounted on the box body 2, and the developing assembly is connected to the photosensitive drum 3 assembly. The box body 2 includes a first end cover 21 and a second end cover 22, which are respectively installed at both ends in the length direction of the processing box 1. The two shafts of the photosensitive drum 3 are supported by the first end cover 21 and the second end cover 22, respectively.

[0032] The processing cartridge 1 includes at least two separation components 4, and in this embodiment, three. The separation components 4 are used to separate the paper being conveyed on the photosensitive drum 3 to prevent the paper from being caught inside the processing cartridge 1 during conveying. Figure 2 As shown, the separating component 4 consists of a separating claw 41, a fixing plate 42, a paper feeding roller 43, and a torsion spring 44. To fix the separating component 4 to the box body 2, the fixing plate is provided with a buckle 45. The separating component 4 is installed and limited on the box body 2 by the buckle 45. The box body 2 is provided with a corresponding engaging part that cooperates with the buckle 45. The engaging part and the box body 2 are integrally formed. Alternatively, in some other embodiments, the separating component 4 can also be installed and fixed with screws. Similarly, the box body is provided with corresponding screw holes that cooperate with the screws.

[0033] Furthermore, the three separation components 4 are equidistantly mounted on the housing 2. When the separation components 4 are in place, the tips of the separation claws 41 contact the surface of the photosensitive drum 3. During normal printing, the photosensitive drum 3 drives the paper to rotate. When the paper comes into contact with the tips of the separation claws 41, it moves along the edge of the separation claws 41, then contacts the paper feed rollers 43 and separates from the photosensitive drum 3, thereby achieving the separation of the paper from the photosensitive drum 3.

[0034] like Figure 1 and Figure 3 As shown, the processing box 1 also includes guide components 5, which are used to guide the paper and are located on one side of the separation components 4. Specifically, there are two guide components 5, which are respectively located inside the separation components 4 at both ends. The distance between the two guide components 5 is L, which is 200.9 mm in this embodiment. When the printing paper size is too small, the end of the paper cannot contact the separation components 4 at both ends, so the paper will be guided and conveyed by the guide components 5 and the separation components 4 located between the two guide components 5. The cooperation of the two guide components 5 and the separation components 4 can guide A4 paper types with short-side feeding, A5 paper types with long-side feeding, and letter paper types. Larger paper types such as A3 paper types and A4 paper types with long-side feeding can be conveyed and separated by the three separation components 4.

[0035] Furthermore, the guide component 5 is a near-trapezoidal plate-shaped protrusion, and in the paper feeding direction, the guide component 5 is perpendicular to the axis of the photosensitive drum 3. While guiding the paper, the guide component 5 can prevent the paper from tilting, thus ensuring print quality.

[0036] Furthermore, to ensure smooth separation even for smaller sheets of paper, during normal printing, the photosensitive drum 3 rotates the paper. The paper first contacts the tip of the separating claw 41 and moves along the edge of the separating claw 41, then is guided by the guide component 5. Specifically, the paper is guided by the inclined surface of the guide component 5. Figure 4 As shown, since the guide component 5 may accumulate dust during the printing process, when the paper is guided by the inclined surface of the guide component 5, it will move along the inclined surface to contact the paper feed roller 43. At this time, in the direction orthogonal to the paper surface, the separation component 4 is higher than the guide component 5. Specifically, the paper feed roller 43 is higher than the guide component 5. This allows the paper to be smoothly separated and guided by the three separation claws 41, while also preventing the paper from contacting the guide component 5 and being contaminated, and also preventing the paper from being lifted up by the guide component 5.

[0037] Furthermore, the present invention is not limited to embodiments such as those described above. In order to effectively separate and guide the paper, the installation position, number, and distance L of the guide component 5 can be adjusted according to the size of the printed paper and the installation position of the separating claw, thereby achieving similar effects as described above.

[0038] The above are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A processing box, comprising: Box body; A photosensitive drum is rotatably mounted on the housing; A separation assembly for separating paper conveyed on the photosensitive drum, at least two of the separation assemblies are mounted on the housing; A guide component for guiding the paper is disposed on one side of the separation assembly.

2. The processing box according to claim 1, characterized in that, In the paper conveying direction, the guide component is perpendicular to the axis of the photosensitive drum.

3. The processing box according to claim 1, characterized in that, The guide component is a plate-shaped protrusion.

4. The processing box according to claim 2, characterized in that, The number of guide components is two.

5. The processing box according to claim 4, characterized in that, The guide component can guide A4 paper types that are fed from the short side, A5 paper types that are fed from the long side, and letter paper types.

6. The processing box according to any one of claims 1-5, characterized in that, The number of separation components is three, and the three separation components are installed equidistantly on the box body.

7. The processing box according to claim 6, characterized in that, The separation component includes a separation claw. During the paper conveying process, the paper first passes through the tip of the separation claw and then through the guide component.

8. The processing box according to claim 7, characterized in that, The guide component is disposed between two adjacent separating components. When the paper is guided by the guide component, the separating component is higher than the guide component in a direction orthogonal to the paper surface.

9. The processing box according to claim 8, characterized in that, The separation component is mounted on the housing by clips or screws.

10. An image forming apparatus, characterized in that, Includes the processing box as described in any one of claims 1-9.

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