Cleaning scraper for selenium drum

Abstract

The utility model discloses a cleaning scraper for a selenium drum, which comprises a blade and a knife rest, and the knife rest comprises a knife holder and a pressing plate; the tool apron comprises a supporting plate, a limiting plate and a plurality of limiting arms arranged at intervals, the limiting plate is fixedly connected with one end of the supporting plate, the blade is placed on the supporting plate, the end, away from a cutting edge, of the blade abuts against the limiting plate, one end of each limiting arm is fixedly connected with the limiting plate, and the limiting arms are located above the supporting plate. The pressing plate is located above the blade, and the two sides of the pressing plate are attached to the blade and the limiting arm correspondingly. The two sides of the supporting plate are bent upwards to form inner edges, the two sides of the pressing plate are bent downwards to form outer edges, threaded holes are formed in the two sides of the inner edges in a penetrating mode, counter bores are formed in the outer edges right opposite to the threaded holes, and the inner edges and the outer edges are connected through bolts. The two ends of the limiting plate are bent in the direction away from the cutting edge to form mounting ends, and mounting holes are formed in the mounting ends. The cleaning scraper for the selenium drum has the advantages that the blade is convenient to replace, the cost is reduced, and the operation is simple.

Description

Technical Field

[0001] This utility model relates to the field of laser printer technology, and in particular to a cleaning scraper for toner cartridges. Background Technology

[0002] Currently, contact-type developing drums are used in laser printers. The laser printing process can be divided into seven steps: charging, exposure, transfer, fixing, cleaning, and static elimination. Five of these steps revolve around the drum. First, the charging roller applies a negative charge to the surface of the photosensitive drum. After the photosensitive drum is charged, when the laser beam shines on its surface, the charge on the irradiated area disappears, while the charge on the unirradiated area remains unchanged. This creates a latent electrostatic image due to the potential difference between the exposed and unexposed areas. Meanwhile, the toner from the toner cartridge is induced to become negatively charged by the charged toner delivery roller. The developing roller, often a metal-core rubber roller, has high resistance. When voltage is applied, the charged toner on the delivery roller transfers to the relatively higher-potential developing roller. The toner ejector blade maintains a very small gap with the developing roller and is also subjected to an alternating voltage. This continuous vibration activates the toner and scrapes it into a thin, uniform layer. Next, as the negatively charged toner travels with the photosensitive drum to the vicinity of the printing paper, it is attracted to the paper surface by the positively charged transfer roller. In the fixing unit, pressure-activated thermal melting is used to immerse the molten toner into the printing paper, forming a fixed image. Next, a cleaning blade scrapes any remaining toner from the photosensitive drum surface into the waste toner container, ensuring a clean photosensitive drum for the next printing cycle. Finally, in the next printing cycle, the charging roller charges the surface of the photosensitive drum, effectively eliminating any residual charge from the previous printing cycle.

[0003] The cleaning scrapers currently used for toner cartridges consist of a scraper holder and a blade. During the production process, the blade is directly glued to the scraper holder. The blade is extremely prone to wear during use. Once worn, the entire cleaning scraper must be replaced, and the scraper holder is discarded, increasing maintenance costs and wasting resources. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this patent application is how to provide a cleaning scraper for toner cartridges that is easy to replace blades, reduces costs, and is simple to operate.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A cleaning scraper for toner cartridges includes a blade and a blade holder for mounting the blade, wherein the blade has a cutting edge at an end located outside the blade holder, and the blade holder includes a blade base and a pressure plate;

[0007] The blade holder includes a support plate, a limiting plate, and several spaced-apart limiting arms. The limiting plate is fixedly connected to one end of the support plate and is perpendicular to the support plate. The blade is placed on the support plate and the end of the blade away from the cutting edge abuts against the limiting plate. One end of the limiting arm is fixedly connected to the limiting plate and is located above the support plate. The pressure plate is located above the blade and its two sides are respectively in contact with the blade and the limiting arm.

[0008] The two sides of the support plate are bent upward to form an inner edge, and the two sides of the pressure plate are bent downward to form an outer edge. The outer edge is located outside the inner edge. Threaded holes are provided through the two sides of the inner edge, and countersunk holes are provided on the outer edge opposite the threaded holes. The inner edge and the outer edge are connected by bolts. The two ends of the limiting plate are bent away from the blade to form mounting ends, and mounting holes are provided on the mounting ends.

[0009] In this way, the mounting ends are formed by bending the two ends of the limiting plate. The blade holder is then fixed inside the toner cartridge with screws, and the blade is used to scrape off the residual toner on the photosensitive roller. During assembly, the blade holder and pressure plate are fitted together, and then inserted between the support plate and the limiting arm. The blade and pressure plate abut against the limiting plate, which limits their installation. Finally, the pressure plate is fixed to the support plate with bolts, pressing the blade firmly. The limiting arm also prevents the blade from warping or deforming under pressure, thus extending its service life and improving the scraping effect of residual toner.

[0010] The blade has several spaced transverse grooves at its upper end, and the pressure plate has several protruding ribs at its lower end that engage with the transverse grooves. The length direction of the ribs is parallel to the length direction of the blade. When the blade engages with the pressure plate, the ribs are located within the transverse grooves, and the length direction of the ribs is parallel to the length direction of the blade, preventing the blade from being pulled out between the pressure plate and the support plate. This makes the blade installation more stable and facilitates better installation of the blade.

[0011] The pallet and the limiting plate are integrally formed, which facilitates manufacturing.

[0012] The limiting arm is welded to the limiting plate for easy assembly.

[0013] The upper end of the limiting arm is provided with a slope, which reduces the overall weight of the scraper assembly.

[0014] In summary, the cleaning scraper for toner cartridges has the advantages of easy blade replacement, reduced costs, and simple operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a cleaning scraper for toner cartridges according to the present invention.

[0016] Figure 2 for Figure 1 The exploded diagram.

[0017] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0018] Figure 4 This is a schematic diagram of the pressure plate. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that directional terms such as "upper," "lower," "top," and "bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0020] like Figure 1-4 As shown, a cleaning scraper for toner cartridges includes a blade 1 and a blade holder for mounting the blade. The blade has a cutting edge at the end located outside the blade holder. The blade holder includes a blade base and a pressure plate 2.

[0021] The blade holder includes a support plate 3, a limiting plate 4, and several spaced limiting arms 5. The limiting plate is fixedly connected to one end of the support plate and is perpendicular to the support plate. The blade is placed on the support plate and the end of the blade away from the cutting edge abuts against the limiting plate. One end of the limiting arm is fixedly connected to the limiting plate and the limiting arm is located above the support plate. The pressure plate is located above the blade and its two sides are respectively attached to the blade and the limiting arm.

[0022] The two sides of the pallet are bent upward to form an inner edge 6, and the two sides of the pressure plate are bent downward to form an outer edge 7. The outer edge is located outside the inner edge. Threaded holes 8 are provided through the two sides of the inner edge, and countersunk holes 9 are provided on the outer edge opposite the threaded holes. The inner edge and the outer edge are connected by bolts 10. The two ends of the limiting plate are bent away from the blade to form mounting ends 11, and mounting ends are provided with mounting holes 12.

[0023] In this way, the mounting ends are formed by bending the two ends of the limiting plate. The blade holder is then fixed inside the toner cartridge with screws, and the blade is used to scrape off the residual toner on the photosensitive roller. During assembly, the blade holder and pressure plate are fitted together, and then inserted between the support plate and the limiting arm. The blade and pressure plate abut against the limiting plate, which limits their installation. Finally, the pressure plate is fixed to the support plate with bolts, pressing the blade firmly. The limiting arm also prevents the blade from warping or deforming under pressure, thus extending its service life and improving the scraping effect of residual toner.

[0024] In specific implementation, the upper end of the blade is provided with several spaced transverse grooves 13, and the lower end of the pressure plate is provided with several protruding ribs 14 that engage with the transverse grooves. The length direction of the ribs is parallel to the length direction of the blade. When the blade is engaged with the pressure plate, the ribs are located within the transverse grooves, and the length direction of the ribs is parallel to the length direction of the blade, preventing the blade from being pulled out between the pressure plate and the support plate, making the installation of the blade more stable and achieving better installation of the blade.

[0025] In practice, the pallet and the limiting plate are integrally formed, which facilitates manufacturing.

[0026] In practice, the limiting arm is welded to the limiting plate for easy assembly.

[0027] In practice, the upper end of the limiting arm is provided with an inclined surface to reduce the overall weight of the scraper assembly.

[0028] Finally, it should be noted that those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A cleaning scraper for a toner cartridge, comprising a blade (1) and a blade holder for mounting the blade, wherein the blade has a cutting edge at its end located outside the blade holder, characterized in that, The tool holder includes a tool holder and a pressure plate (2); The blade holder includes a support plate (3), a limiting plate (4), and several spaced limiting arms (5). The limiting plate is fixedly connected to one end of the support plate and is perpendicular to the support plate. The blade is placed on the support plate and the end of the blade away from the cutting edge abuts against the limiting plate. One end of the limiting arm is fixedly connected to the limiting plate and is located above the support plate. The pressure plate is located above the blade and its two sides are respectively attached to the blade and the limiting arm. The two sides of the pallet are bent upward to form an inner edge (6), and the two sides of the pressure plate are bent downward to form an outer edge (7). The outer edge is located outside the inner edge. Threaded holes (8) are provided through the two sides of the inner edge. Countersunk holes (9) are provided on the outer edge opposite the threaded holes. The inner edge and the outer edge are connected by bolts (10). The two ends of the limiting plate are bent away from the blade to form mounting ends (11). Mounting ends are provided with mounting holes (12).

2. A cleaning scraper for a toner cartridge according to claim 1, characterized in that, The upper end of the blade is provided with several spaced transverse grooves (13), and the lower end of the pressure plate is provided with several protruding ribs (14) that engage with the transverse grooves. The length direction of the ribs is parallel to the length direction of the blade.

3. A cleaning scraper for a toner cartridge according to claim 2, characterized in that, The tray and the limiting plate are integrally formed.

4. A cleaning scraper for a toner cartridge according to claim 3, characterized in that, The limiting arm is welded to the limiting plate.

5. A cleaning scraper for a toner cartridge according to claim 4, characterized in that, The upper end of the limiting arm is provided with an inclined surface.

Images