A toner cartridge with a limiting function
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI ORITONE INFOTECH CO LTD
- Filing Date
- 2025-09-19
- Publication Date
- 2026-06-30
Smart Images
Figure CN224436768U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of toner cartridge technology, specifically a toner cartridge with a limiting function. Background Technology
[0002] As consumable parts in electronic imaging devices such as laser printers, copiers, and fax machines, toner cartridges usually need to be replaced and recycled after the toner stored inside is used up. Existing toner cartridges have some shortcomings in use. In order to meet market needs, a toner cartridge with a limit function is needed.
[0003] The existing toner cartridges are cumbersome and inconvenient to disassemble and replace. They also lack a limit stop for the toner dispensing blade, making it difficult to ensure consistent blade placement, increasing defect rates and wasting resources. Furthermore, existing toner cartridges are not effective at cleaning excess toner from the photosensitive roller, failing to automatically scrape toner from the roller into the waste toner container, which can negatively impact print quality. In addition, replacing the photosensitive roller is inconvenient, easily leading to roller wear and affecting normal printer operation. Utility Model Content
[0004] The purpose of this utility model is to provide a toner cartridge with a limiting function to solve the problems mentioned in the background art, such as the inability to limit the toner dispensing blade during use, insufficient cleaning effect on excess toner on the surface of the photosensitive roller, and inconvenience in operation when replacing the photosensitive roller.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a toner cartridge with a limiting function, comprising a toner cartridge body, side covers installed on both sides of the toner cartridge body, a handle installed on the surface of the toner cartridge body, a photosensitive roller disposed inside the toner cartridge body, the photosensitive roller rotating in cooperation with the inner wall of the toner cartridge body, a developing roller disposed inside the toner cartridge body, the developing roller rotating in cooperation with the inner wall of the toner cartridge body, a fixing frame installed on the inner wall of the toner cartridge body, a bracket installed on the inner wall of the toner cartridge body, a convenient replacement mechanism provided on the surface of the toner cartridge body, a limiting mechanism provided on the surface of the fixing frame, and a residual toner cleaning mechanism provided on the surface of the photosensitive roller and the bracket.
[0006] Preferably, the surface of the toner cartridge body is provided with a cover, which is engaged with the interior of the toner cartridge body. The surface of the side cover is provided with a toner filling port, and the surface of the side cover is provided with a sealing plug. One end of the sealing plug extends into the interior of the toner filling port and contacts the inner wall of the toner filling port. The interior of the toner cartridge body is provided with a charging roller, which rotates with the inner wall of the toner cartridge body.
[0007] Preferably, the easy replacement mechanism consists of a mounting rod, a fastening bolt, a screw, and a mounting block. The surface of the side cover is provided with mounting rods. One end of the mounting rod passes through the side cover and the toner cartridge body in sequence and extends to one side of the photosensitive roller. The surface of the photosensitive roller is threaded with a fastening bolt. One end of the fastening bolt passes through the photosensitive roller and is fastened to the surface thread of the mounting rod.
[0008] Preferably, each of the mounting rods is fitted with a mounting block, and the mounting block is threaded with a screw, one end of which passes through the mounting block and is fastened to the threaded surface of the side cover.
[0009] Preferably, the limiting mechanism consists of a blade holder plate, a toner dispensing blade, a nail body, an adjusting slider, and a fixed slide groove. The surface of the fixed frame is provided with a blade holder plate, and the surface of the blade holder plate is equipped with a toner dispensing blade for controlling the amount of toner. The surface of the side cover is provided with a fixed slide groove, and the interior of the fixed slide groove is provided with an adjusting slider. The adjusting slider and the surface of the fixed slide groove slide in mutual sliding cooperation.
[0010] Preferably, the surface of the adjusting slider is threadedly connected to a nail body, one end of which penetrates the adjusting slider and is threadedly fastened to the inner wall of the fixing groove. The surface of the adjusting slider extends into the interior of the toner cartridge body and is fixed to the surface of the blade holder plate.
[0011] Preferably, the residual powder cleaning mechanism consists of a connecting rod, a mounting frame, screws, elastic clips, and a scraper. The surface of the frame is provided with a connecting rod, and the surface of the connecting rod is equipped with a mounting frame. One end of the frame extends into the interior of the mounting frame, and the surface of the frame is equipped with an elastic clip that engages with the inner wall of the mounting frame.
[0012] Preferably, the mounting frame is threaded with screws, one end of which passes through the mounting frame and is threaded onto the surface of the frame. The connecting rod is fitted with a scraper for cleaning waste powder from the surface of the photosensitive roller, and the inner wall of the scraper is in contact with the surface of the photosensitive roller.
[0013] Compared with the prior art, the beneficial effects of this utility model are: the toner cartridge with limiting function not only ensures that the installation position of the toner blade remains consistent during use, thus reducing the product defect rate and saving resources, but also allows the toner cartridge to automatically scrape the toner on the surface of the photosensitive roller into the waste toner container during use, without affecting the printer's printing effect. Furthermore, it makes it convenient for users to replace the worn photosensitive roller, avoiding the impact of photosensitive roller wear on the normal operation of the printer.
[0014] 1. By setting a limiting mechanism, the user can loosen the pin on the surface of the adjusting slider and then pull the pin, causing the pin to move the blade holder plate and the powder dispensing blade, thereby adjusting the position of the blade holder plate and the powder dispensing blade to determine the distance between the powder dispensing blade and the developing roller. Subsequently, the user tightens the pin on the surface of the adjusting slider, and the powder dispensing blade is fixed inside the fixed slide groove under the action of the pin, thereby fixing the position of the blade holder plate and the powder dispensing blade and preventing displacement of the blade holder plate and the powder dispensing blade. This realizes the function of limiting the powder dispensing blade of the toner cartridge, so that the installation position of the powder dispensing blade can be kept consistent when the toner cartridge is used, thereby reducing the product defect rate and saving resources.
[0015] 2. Equipped with a residual toner cleaning mechanism, the elastic clips on the frame surface automatically engage with the inner wall of the mounting bracket, positioning the mounting bracket in place. After installation, the user tightens the screws on the mounting bracket surface, which, in turn, installs the mounting bracket and connecting rod onto the frame surface. When the photosensitive roller is working, some excess toner adheres to its surface. The connecting rod and scraper work together to scrape the excess toner from the photosensitive roller surface into the waste toner bin. If the user needs to replace the connecting rod and scraper, the user loosens the screws on the mounting bracket surface and pulls the connecting rod and scraper downwards, moving the elastic clips away from the inner wall of the mounting bracket. This allows the connecting rod, mounting bracket, and scraper to be removed from the frame surface for replacement, ensuring effective removal of excess toner from the photosensitive roller surface. This achieves the function of the toner cartridge cleaning excess toner from the photosensitive roller surface, enabling the toner cartridge to automatically scrape the toner from the photosensitive roller surface into the waste toner bin during use, without affecting the printer's printing quality.
[0016] 3. With a convenient replacement mechanism, the user removes the cover from the surface of the toner cartridge, loosens the fastening bolts on the surface of the photosensitive roller, loosens the screws on the surface of the mounting block, and then pulls the mounting rod to move it away from the toner cartridge body. At this point, the mounting rod is away from the surface of the photosensitive roller. The user can then pull the photosensitive roller to remove it from the inside of the toner cartridge body for replacement. This feature enables convenient replacement of the photosensitive roller in the toner cartridge, allowing users to easily replace the worn photosensitive roller and preventing printer malfunctions caused by roller wear. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0018] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model;
[0019] Figure 3 This is an enlarged side view sectional diagram of the present invention;
[0020] Figure 4 For the present utility model Figure 2 An enlarged structural diagram of the mechanism for easy replacement;
[0021] Figure 5 For the present utility model Figure 3 Enlarged schematic diagram of the middle limit mechanism;
[0022] Figure 6 For the present utility model Figure 3 An enlarged schematic diagram of the waste powder cleaning mechanism.
[0023] In the diagram: 1. Toner cartridge body; 101. Side cover; 102. Cover; 103. Handle; 104. Toner filling port; 105. Sealing plug; 106. Fixing frame; 107. Developing roller; 108. Photosensitive roller; 109. Charging roller; 110. Frame; 2. Easy replacement mechanism; 21. Mounting rod; 22. Fastening bolt; 23. Screw; 24. Mounting block; 3. Limiting mechanism; 31. Blade holder plate; 32. Toner dispensing blade; 33. Nail body; 34. Adjusting slider; 35. Fixing groove; 4. Residual toner cleaning mechanism; 41. Connecting rod; 42. Mounting frame; 43. Screw; 44. Elastic clip; 45. Scraper. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. 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 an indirect connection through an intermediate medium. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.
[0025] The present invention provides a toner cartridge with a limiting function, the structure of which is as follows: Figure 1 and Figure 2 As shown, the device includes a toner cartridge body 1, side covers 101 mounted on both sides of the toner cartridge body 1, a cover 102 provided on the surface of the toner cartridge body 1, the cover 102 engaging with the interior of the toner cartridge body 1, a handle 103 mounted on the surface of the toner cartridge body 1, a toner filling port 104 provided on the surface of the side covers 101, and a sealing plug 105 provided on the surface of the side covers 101, one end of the sealing plug 105 extending into the interior of the toner filling port 104 and contacting the inner wall of the toner filling port 104. The toner cartridge body 1 has a photosensitive roller 108 inside, which rotates and engages with the inner wall of the toner cartridge body 1. The toner cartridge body 1 also has a developing roller 107 inside, which rotates and engages with the inner wall of the toner cartridge body 1. The toner cartridge body 1 also has a charging roller 109 inside, which rotates and engages with the inner wall of the toner cartridge body 1. A fixing frame 106 and a bracket 110 are installed on the inner wall of the toner cartridge body 1.
[0026] Furthermore, such as Figure 2 and Figure 4 As shown, the surfaces of the toner cartridge body 1, side cover 101, and photosensitive roller 108 are provided with a convenient replacement mechanism 2. The convenient replacement mechanism 2 consists of a mounting rod 21, a fastening bolt 22, a screw 23, and a mounting block 24. The surface of the side cover 101 is provided with a mounting rod 21. One end of the mounting rod 21 passes through the side cover 101 and the toner cartridge body 1 and extends to one side of the photosensitive roller 108. The surface of the photosensitive roller 108 is threaded with a fastening bolt 22. One end of the fastening bolt 22 passes through the photosensitive roller 108 and is threadedly fastened to the surface of the mounting rod 21. The surface of the mounting rod 21 is provided with a mounting block 24. The surface of the mounting block 24 is threaded with a screw 23. One end of the screw 23 passes through the mounting block 24 and is threadedly fastened to the surface of the side cover 101.
[0027] In practice, the user removes the cover 102 from the surface of the toner cartridge body 1, then loosens the fastening bolts 22 on the surface of the photosensitive roller 108, then loosens the screws 23 on the surface of the mounting block 24, and then pulls the mounting rod 21, causing the mounting rod 21 to move away from the interior of the toner cartridge body 1. At this time, the mounting rod 21 moves away from the surface of the photosensitive roller 108. The user then pulls the photosensitive roller 108 to remove it from the interior of the toner cartridge body 1 and replaces the photosensitive roller 108, thus realizing the function of conveniently replacing the photosensitive roller 108 in the toner cartridge.
[0028] Furthermore, such as Figure 3 and Figure 5As shown, the surface of the fixing frame 106 is provided with a limiting mechanism 3. The limiting mechanism 3 consists of a blade holder plate 31, a toner dispensing blade 32, a nail body 33, an adjusting slider 34, and a fixing groove 35. The surface of the fixing frame 106 is provided with a blade holder plate 31. A toner dispensing blade 32 for controlling the amount of toner is installed on the surface of the blade holder plate 31. A fixing groove 35 is opened on the surface of the side cover 101. An adjusting slider 34 is provided inside the fixing groove 35. The adjusting slider 34 and the surface of the fixing groove 35 slide against each other. A nail body 33 is threadedly connected to the surface of the adjusting slider 34. One end of the nail body 33 passes through the adjusting slider 34 and is threadedly fastened to the inner wall of the fixing groove 35. The surface of the adjusting slider 34 extends into the interior of the toner cartridge body 1 and is fixed to the surface of the blade holder plate 31.
[0029] During implementation, the amount of toner transferred to the surface of the photosensitive roller 108 is controlled by the combined action of the blade holder plate 31 and the toner dispensing blade 32. During use, the blade holder plate 31 and the toner dispensing blade 32 need to be positioned to prevent positional changes in the toner dispensing blade 32 from affecting the amount of toner delivered to the surface of the photosensitive roller 108, thus further impacting printer operation. At this point, the user loosens the pin 33 on the surface of the adjusting slider 34 and then pulls the pin 33, causing it to move the blade holder plate 31 and the toner dispensing blade 32, thereby adjusting their positions and determining the distance between the toner dispensing blade 32 and the developing roller 107. Subsequently, the user tightens the pin 33 on the surface of the adjusting slider 34, fixing the toner dispensing blade 32 inside the fixing groove 35 under the action of the pin 33, thus fixing the positions of the blade holder plate 31 and the toner dispensing blade 32 and preventing displacement, thereby achieving the function of limiting the toner dispensing blade 32 by the toner cartridge.
[0030] Furthermore, such as Figure 3 and Figure 6 As shown, the photosensitive roller 108 and the frame 110 are provided with a residual powder cleaning mechanism 4. The residual powder cleaning mechanism 4 consists of a connecting rod 41, a mounting frame 42, a screw 43, an elastic clip 44, and a scraper 45. The surface of the frame 110 is provided with a connecting rod 41, and the surface of the connecting rod 41 is equipped with a mounting frame 42. One end of the frame 110 extends into the interior of the mounting frame 42. The surface of the frame 110 is equipped with an elastic clip 44, which engages with the inner wall of the mounting frame 42. The surface of the mounting frame 42 is threaded with a screw 43, one end of which passes through the mounting frame 42 and is threadedly fastened to the surface of the frame 110. The surface of the connecting rod 41 is equipped with a scraper 45 for cleaning waste powder from the surface of the photosensitive roller 108. The inner wall of the scraper 45 is in contact with the surface of the photosensitive roller 108.
[0031] During implementation, the user removes the side cover 101 from the surface of the toner cartridge body 1, and then places the mounting bracket 42 on the surface of the frame 110. The elastic clips 44 on the surface of the frame 110 automatically snap into the inner wall of the mounting bracket 42, positioning the mounting bracket 42 in the correct installation position. After installation, the user tightens the screws 43 on the surface of the mounting bracket 42. Under the action of the screws 43, the mounting bracket 42 and the connecting rod 41 are installed on the surface of the frame 110. When the photosensitive roller 108 is working, some excess toner will adhere to its surface. This excess toner is then transferred to the connecting rod 41 and the wiper blade 45. Under the combined action, excess abrasive powder on the surface of the photosensitive roller 108 is scraped off into the waste toner compartment. If the user needs to replace the connecting rod 41 and the scraper 45, the user loosens the screw 43 on the surface of the mounting bracket 42 and then pulls down the connecting rod 41 and the scraper 45, so that the elastic clip 44 is away from the inner wall of the mounting bracket 42, thereby removing the connecting rod 41, the mounting bracket 42 and the scraper 45 from the surface of the frame 110 for replacement, so as to ensure the scraping effect of excess abrasive powder on the surface of the photosensitive roller 108, so as to realize the function of the toner cartridge to clean excess toner on the surface of the photosensitive roller 108.
[0032] Working Principle: In use, first place the toner cartridge body 1 in the designated position. The user installs the side cover 101 on the surface of the toner cartridge body 1. Under the action of the developing roller 107, the toner in the toner compartment is transferred to the surface of the developing roller 107. Under the action of the charging roller 109, the surface of the photosensitive roller 108 is charged. At the end of the cycle, the charging roller 109 removes the remaining charge from the surface of the photosensitive roller 108. The amount of toner transferred to the surface of the photosensitive roller 108 is controlled by the combined action of the blade plate 31 and the toner dispensing blade 32. During use, the blade plate 31 and the toner dispensing blade 32 need to be limited to prevent the position of the toner dispensing blade 32 from changing and affecting the amount of toner delivered to the surface of the photosensitive roller 108, thus further affecting the use of the printer. At this time, the user... Loosen the nail 33 on the surface of the adjusting slider 34, and then pull the nail 33 to move the blade holder plate 31 and the powder outlet blade 32, thereby adjusting the position of the blade holder plate 31 and the powder outlet blade 32 to determine the distance between the powder outlet blade 32 and the developing roller 107. Then, the user tightens the nail 33 on the surface of the adjusting slider 34. Under the action of the nail 33, the powder outlet blade 32 is fixed inside the fixing groove 35, thereby fixing the position of the blade holder plate 31 and the powder outlet blade 32 and preventing displacement of the blade holder plate 31 and the powder outlet blade 32. This achieves the function of limiting the powder outlet blade 32 by the toner cartridge, so that the installation position of the powder outlet blade 32 can be kept consistent when the toner cartridge is used, thereby reducing the product defect rate and saving resources.
[0033] Subsequently, the user removes the side cover 101 from the surface of the toner cartridge body 1, and then places the mounting bracket 42 on the surface of the frame 110. The elastic clip 44 on the surface of the frame 110 automatically snaps into the inner wall of the mounting bracket 42, positioning the mounting bracket 42 in the correct installation position. After installation, the user tightens the screws 43 on the surface of the mounting bracket 42. Under the action of the screws 43, the mounting bracket 42 and the connecting rod 41 are installed on the surface of the frame 110. When the photosensitive roller 108 is working, some excess toner will stick to its surface. Under the combined action of the connecting rod 41 and the scraper 45, the excess toner on the surface of the photosensitive roller 108 is scraped off into the waste toner bin. Inside the frame, if the user needs to replace the connecting rod 41 and the scraper 45, the user loosens the screw 43 on the surface of the mounting bracket 42, and then pulls down the connecting rod 41 and the scraper 45, so that the elastic clip 44 is away from the inner wall of the mounting bracket 42, thereby removing the connecting rod 41, the mounting bracket 42 and the scraper 45 from the surface of the frame 110 for replacement, so as to ensure the scraping effect of excess powder on the surface of the photosensitive roller 108, so as to realize the function of the toner cartridge to clean the excess toner on the surface of the photosensitive roller 108, so that the toner cartridge can automatically scrape the toner on the surface of the photosensitive roller 108 to the waste toner container when in use, and will not affect the printing effect of the printer.
[0034] Subsequently, most malfunctions of the toner cartridge body 1 are caused by surface wear of the photosensitive roller 108, affecting the printer's printing effect. The user removes the cover 102 from the surface of the toner cartridge body 1, then loosens the fastening bolts 22 on the surface of the photosensitive roller 108, and then loosens the screws 23 on the surface of the mounting block 24. The user then pulls the mounting rod 21, causing it to move away from the interior of the toner cartridge body 1. At this point, the mounting rod 21 is away from the surface of the photosensitive roller 108. The user then pulls the photosensitive roller 108 to remove it from the interior of the toner cartridge body 1 and replace it. This allows for convenient replacement of the photosensitive roller 108 in the toner cartridge, making it easier for the user to replace the worn photosensitive roller 108 and preventing the printer from being affected by wear on the photosensitive roller 108. This completes the use of the toner cartridge.
[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A toner cartridge with a limiting function, comprising a toner cartridge body (1), characterized in that: Side covers (101) are installed on both sides of the toner cartridge body (1). A handle (103) is installed on the surface of the toner cartridge body (1). A photosensitive roller (108) is installed inside the toner cartridge body (1). The photosensitive roller (108) rotates with the inner wall of the toner cartridge body (1). A developing roller (107) is installed inside the toner cartridge body (1). The developing roller (107) rotates with the inner wall of the toner cartridge body (1). A fixing frame (106) is installed on the inner wall of the toner cartridge body (1). A frame (110) is installed on the inner wall of the toner cartridge body (1). A convenient replacement mechanism (2) is provided on the surface of the toner cartridge body (1), the side covers (101), and the photosensitive roller (108). A limit mechanism (3) is provided on the surface of the fixing frame (106). A residual toner cleaning mechanism (4) is provided on the surface of the photosensitive roller (108) and the frame (110).
2. A toner cartridge with a limiting function according to claim 1, characterized in that: The surface of the toner cartridge body (1) is provided with a cover (102), which is engaged with the interior of the toner cartridge body (1). The surface of the side cover (101) is provided with a toner filling port (104), and the surface of the side cover (101) is provided with a sealing plug (105). One end of the sealing plug (105) extends into the interior of the toner filling port (104) and contacts the inner wall of the toner filling port (104). The interior of the toner cartridge body (1) is provided with a charging roller (109), which rotates with the inner wall of the toner cartridge body (1).
3. A toner cartridge with a limiting function according to claim 1, characterized in that: The convenient replacement mechanism (2) consists of a mounting rod (21), a fastening bolt (22), a screw (23), and a mounting block (24). The surface of the side cover (101) is provided with mounting rods (21). One end of the mounting rod (21) passes through the side cover (101) and the toner cartridge body (1) in sequence and extends to one side of the photosensitive roller (108). The surface of the photosensitive roller (108) is threaded with a fastening bolt (22). One end of the fastening bolt (22) passes through the photosensitive roller (108) and is threadedly fastened to the surface of the mounting rod (21).
4. A toner cartridge with a limiting function according to claim 3, characterized in that: Mounting blocks (24) are mounted on the surface of each mounting rod (21). Screws (23) are threaded onto the surface of each mounting block (24). One end of each screw (23) passes through the mounting block (24) and is threaded onto the surface of the side cover (101).
5. A toner cartridge with a limiting function according to claim 1, characterized in that: The limiting mechanism (3) consists of a blade holder plate (31), a powder dispensing blade (32), a nail body (33), an adjusting slider (34), and a fixed slide groove (35). The surface of the fixed frame (106) is provided with a blade holder plate (31), and the surface of the blade holder plate (31) is equipped with a powder dispensing blade (32) for controlling the amount of toner. The surface of the side cover (101) is provided with a fixed slide groove (35), and the interior of the fixed slide groove (35) is provided with an adjusting slider (34). The adjusting slider (34) and the surface of the fixed slide groove (35) slide against each other.
6. A toner cartridge with a limiting function according to claim 5, characterized in that: The surface of the adjusting slider (34) is threaded with a nail body (33). One end of the nail body (33) passes through the adjusting slider (34) and is threadedly fastened to the inner wall of the fixed slide groove (35). The surface of the adjusting slider (34) extends into the interior of the toner cartridge body (1) and is fixed to the surface of the knife holder plate (31).
7. A toner cartridge with a limiting function according to claim 1, characterized in that: The residual powder cleaning mechanism (4) consists of a connecting rod (41), a mounting bracket (42), screws (43), elastic clips (44), and a scraper (45). The surface of the frame (110) is provided with a connecting rod (41), and the surface of the connecting rod (41) is equipped with a mounting bracket (42). One end of the frame (110) extends into the interior of the mounting bracket (42). The surface of the frame (110) is equipped with an elastic clip (44), and the elastic clip (44) engages with the inner wall of the mounting bracket (42).
8. A toner cartridge with a limiting function according to claim 7, characterized in that: The mounting bracket (42) is threaded with screws (43), one end of which passes through the mounting bracket (42) and is threadedly fastened to the surface of the frame (110). The connecting rod (41) is equipped with a scraper (45) for cleaning waste powder from the surface of the photosensitive roller (108), and the inner wall of the scraper (45) is in contact with the surface of the photosensitive roller (108).