Cleaning scraper

Abstract

The utility model discloses a cleaning scraper which comprises a scraper shaft, the two ends of the scraper shaft are connected with a powder box side plate through bearings, the two ends of the scraper shaft penetrate through the powder box side plate and are provided with hand wheels outwards, and locking structures are arranged between the hand wheels and the side plate. At least three knife rests are uniformly distributed and fixed in the circumferential direction of the knife shaft, scrapers are adhered to the knife rests, the scrapers are in contact with the surface of the photosensitive drum, and the plane where the scrapers in contact with the photosensitive drum are located passes through the axis of the knife shaft and the axis of the photosensitive drum. The cleaning scraper has the advantages that the cleaning scraper is of a multi-blade rotating structure, the equipment dismounting frequency is reduced, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser printers, in particular to a cleaning scraper. Background Art

[0002] With the continuous development of laser printing technology, the requirements for printing speed and printing quality are getting higher and higher, which has led to the increasing popularity of the use of chemical polymer toner. Chemical toner has a high degree of sphericity and a small particle size distribution, which brings high quality to the printed images.

[0003] However, chemical toner with a high degree of sphericity and a small particle size distribution will also make it difficult to clean the residual toner on the surface of the photosensitive drum, causing the charging roller to be contaminated by the residual toner on the surface of the photosensitive drum. As the number of printed pages increases, the toner adhered to the surface of the charging roller continues to accumulate, causing the charging roller to charge the photosensitive drum unevenly, and the printed graphics to have uneven concentration. If this problem occurs, the equipment needs to be disassembled, the cleaning scraper removed, and the cleaning scraper wiped to remove the toner deposited on the cleaning scraper. However, the end of the equipment involves multiple gear transmissions. After disassembly, it is difficult to assemble, which can easily cause damage to the equipment. Disassembly takes a long time and requires the use of tools such as screwdrivers, which is extremely inconvenient to operate. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by this patent application is how to provide a cleaning scraper with a multi-piece rotating structure to reduce the frequency of disassembly of the equipment and improve the user experience.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A cleaning scraper comprises a blade shaft, both ends of the blade shaft are connected to the side plates of a powder box through bearings, both ends of the blade shaft pass through the side plates of the powder box and are provided with hand wheels outwardly, and a locking structure is provided between the hand wheels and the side plates;

[0007] At least three knife racks are evenly distributed and fixed around the knife shaft. A scraper is bonded to the knife rack. The scraper contacts the surface of the photosensitive drum. The plane where the scraper contacts the photosensitive drum passes through the axis of the knife shaft and the axis of the photosensitive drum.

[0008] In this way, when the printer prints with uneven density or needs to add powder, the powder box of the printer is disassembled, and then the hand wheel is turned to drive the knife shaft to rotate, and then the scraper facing the photosensitive drum is switched, and then the powder box is returned to the printer to continue printing. This can reduce the chance of disassembling the powder box and is more suitable for general users. There are at least three knife holders, which can better avoid frequent disassembly of the powder box and better extend the service life of the powder box. After the knife shaft is adjusted into place, the locking structure locks the position of the knife shaft, so that the scraper can better scrape the residual toner on the surface of the photosensitive drum. The plane where the scraper contacts the photosensitive drum passes through the axis of the knife shaft and the axis of the photosensitive drum, so that the scraper can rotate along the knife shaft and can scrape the toner on the photosensitive drum.

[0009] Among them, the locking structure includes a through hole arranged on the hand wheel, and the side panel of the powder box is provided with a threaded blind hole, and a bolt is passed through the through hole and connected to the threaded blind hole by a thread, the number of the threaded blind holes is the same as the number of the tool holder, and when the scraper contacts the surface of the photosensitive drum, the through hole is arranged opposite to one of the threaded blind holes.

[0010] Wherein, the blade holder is U-shaped, and the scraper is bonded inside the blade holder.

[0011] Among them, both ends of the knife shaft are circumferentially protruding with supports with the same number as the knife holders, the supports are located between the two knife holders, the supports are fixed with an internal threaded tube, a glass bead screw is installed in the internal threaded tube, the side panel of the powder box is provided with a slot that can be engaged with the glass bead of the ball screw, and the supports are provided with a clearance hole opposite to the glass bead; when the scraper contacts the surface of the photosensitive drum, the glass bead of the glass bead screw is engaged in the slot.

[0012] When the scraper is in contact with the photosensitive drum, the length of the portion of the blade holder located at the upper end of the scraper is greater than the length of the portion of the blade holder located at the lower end of the scraper.

[0013] In summary, the cleaning scraper has a multi-piece rotating structure, which reduces the frequency of disassembly of the equipment and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic structural diagram of a cleaning scraper.

[0015] Figure 2 This is a schematic diagram of a cleaning scraper described in the utility model after removing the powder box side plate, hand wheel and locking structure.

[0016] Figure 3 Schematic diagram of the scraper and the blade holder. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "upper, lower" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0018] like Figure 1-3 As shown, a cleaning scraper comprises a blade shaft 1, both ends of which are connected to a powder box side plate 2 through bearings, and both ends of the blade shaft pass through the powder box side plate and are outwardly mounted with hand wheels 3, and a locking structure is provided between the hand wheels and the side plate;

[0019] At least three knife racks 4 are evenly distributed and fixed around the knife shaft. A scraper 5 is bonded to the knife rack. The scraper contacts the surface of the photosensitive drum. The plane of the scraper in contact with the photosensitive drum passes through the axis of the knife shaft and the axis of the photosensitive drum.

[0020] In this way, when the printer prints with uneven density or needs to add powder, the powder box of the printer is disassembled, and then the hand wheel is turned to drive the knife shaft to rotate, and then the scraper facing the photosensitive drum is switched, and then the powder box is returned to the printer to continue printing. This can reduce the chance of disassembling the powder box and is more suitable for general users. There are at least three knife holders, which can better avoid frequent disassembly of the powder box and better extend the service life of the powder box. After the knife shaft is adjusted into place, the locking structure locks the position of the knife shaft, so that the scraper can better scrape the residual toner on the surface of the photosensitive drum. The plane where the scraper contacts the photosensitive drum passes through the axis of the knife shaft and the axis of the photosensitive drum, so that the scraper can rotate along the knife shaft and can scrape the toner on the photosensitive drum.

[0021] During implementation, the locking structure includes a through hole provided on the hand wheel, a threaded blind hole provided on the side plate of the powder box, and a bolt 6 is passed through the through hole and connected to the threaded blind hole by thread. The number of the threaded blind holes is the same as the number of the tool holder. When the scraper contacts the surface of the photosensitive drum, the through hole is arranged opposite to one of the threaded blind holes. When the tool shaft rotates into place, the bolt is opposite to the threaded blind hole, and the bolt is screwed into the threaded blind hole to lock the position of the tool shaft.

[0022] During implementation, the blade holder is U-shaped, and the scraper is bonded inside the blade holder, so that the scraper can be easily installed.

[0023] During implementation, both ends of the knife shaft are circumferentially protruding with supports 7 of the same number as the knife holders. The supports are located between the two knife holders. The supports are fixed with an internal threaded barrel 8, and a glass bead screw is installed in the internal threaded barrel. The side plate of the powder box is provided with a slot that can be engaged with the glass bead of the ball screw, and the supports are provided with a clearance hole facing the glass bead 9; when the scraper contacts the surface of the photosensitive drum, the glass bead of the glass bead screw is engaged in the slot. Through the setting of the glass bead screw, it is engaged with the slot, and the knife shaft can be rotated in place to provide better feedback.

[0024] During implementation, when the scraper contacts the photosensitive drum, the length of the portion of the blade holder located at the upper end of the scraper is greater than the length of the portion of the blade holder located at the lower end of the scraper. By setting the upper portion longer and the lower portion shorter, the scraper is better supported, so that the scraper can better scrape off the toner and avoid turning over.

[0025] Finally, it should be noted that those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

Claims

1. A cleaning scraper, characterized in that: It includes a knife shaft, both ends of which are connected to the side plates of the powder box through bearings, and both ends of the knife shaft pass through the side plates of the powder box and are equipped with hand wheels outwardly, and a locking structure is provided between the hand wheels and the side plates; At least three knife racks are evenly distributed and fixed around the knife shaft. A scraper is bonded to the knife rack. The scraper contacts the surface of the photosensitive drum. The plane where the scraper contacts the photosensitive drum passes through the axis of the knife shaft and the axis of the photosensitive drum.

2. A cleaning blade according to claim 1, characterized in that: The locking structure includes a through hole arranged on the hand wheel, and the powder box side panel is provided with a threaded blind hole. Bolts are passed through the through hole and connected to the threaded blind hole by threads. The number of the threaded blind holes is the same as the number of the tool holder. When the scraper contacts the surface of the photosensitive drum, the through hole is arranged opposite to one of the threaded blind holes.

3. A cleaning blade according to claim 2, characterized in that: The blade holder is U-shaped, and the scraper is bonded inside the blade holder.

4. A cleaning blade according to claim 1, characterized in that: Both ends of the knife shaft are circumferentially protruding with supports with the same number as the knife holders, the supports are located between the two knife holders, the supports are fixed with an internal threaded tube, a glass bead screw is installed in the internal threaded tube, the side panel of the powder box is provided with a slot that can be engaged with the glass bead of the ball screw, and the supports are provided with a clearance hole opposite to the glass bead; when the scraper contacts the surface of the photosensitive drum, the glass bead of the glass bead screw is engaged in the slot.

5. A cleaning blade according to claim 1, characterized in that: When the scraper is in contact with the photosensitive drum, the length of the portion of the blade holder located at the upper end of the scraper is greater than the length of the portion of the blade holder located at the lower end of the scraper.

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