Scraper assembly and processing box

Abstract

The utility model relates to a scraper assembly and a processing box, and aims to reduce the cost and guarantee the powdered ink control efficiency and the printing quality of a selenium drum of a laser printer at the same time. The scraper assembly comprises a knife rest made of non-metal materials and a scraper installed in a scraper installation groove of the knife rest. The knife rest is made of light high-strength engineering plastic and has excellent wear resistance and corrosion resistance, and the production cost and the energy consumption of the printer are effectively reduced. And the scraper assembly is divided into a powder outlet scraper and a waste powder scraper which are respectively used for the developing unit and the photosensitive unit and are contacted with the developing roller and the photosensitive drum to ensure uniform output and effective removal of the powdered ink. The knife rest of the waste powder scraper is provided with a reinforcing part which comprises reinforcing ribs and reinforcing columns, so that the structural stability is improved. According to the scraper assembly and the processing box, through optimal design and material selection, the performance of the selenium drum is comprehensively improved, and the scraper assembly and the processing box have wide market application prospects.

Description

Technical Field

[0001] The utility model relates to the field of imaging printing, in particular to the technical field of a processing cartridge for an imaging printing device. Specifically, the utility model relates to a blade assembly in the processing cartridge. Background Art

[0002] As one of the core components of a laser printer, the main function of the processing cartridge is to carry toner and transfer it to the printing paper. During the operation of the processing cartridge, the blade assembly plays a crucial role. The blade assembly includes a waste toner blade and / or a powder outlet blade. The main function of the waste toner blade is to remove the excess toner on the surface of the processing cartridge, ensuring the uniform distribution of toner on the surface of the toner cartridge during each printing, thereby guaranteeing the printing quality. As one of the key components in the processing cartridge, the main function of the powder outlet blade is to scrape the toner on the surface of the developing roller, ensuring the uniformity and thickness of the toner layer, and enabling the toner to be evenly transported from the powder bin to the surface of the photosensitive drum.

[0003] Traditional blade assemblies mostly use metal materials such as steel or aluminum. Although metal blade assemblies have certain strength and wear resistance, they have high costs and large weights; moreover, metal materials are prone to rust in humid or corrosive environments, affecting the performance and lifespan of the blade assembly.

[0004] To solve the above problems, reduce costs and increase the lifespan of the blade assembly, the utility model patent proposes a blade assembly and a processing cartridge, which improve the material and structure of the blade assembly to achieve better cost reduction, higher durability, and stronger environmental adaptability. Summary of the Utility Model

[0005] The utility model patent aims to provide a blade assembly and a processing cartridge. The blade assembly solves the problems of high cost, large weight, and poor environmental adaptability existing in traditional metal blade assemblies by using a non-metal material knife holder and an optimized structural design. The following is a detailed description of the technical solution of this patent:

[0006] In a first aspect, an embodiment of the utility model provides a blade assembly. The blade assembly includes a waste toner blade and / or a powder outlet blade. The waste toner blade and / or the powder outlet blade include a blade and a knife holder. The knife holder in the utility model patent uses a non-metal material, preferably ABS (acrylonitrile-butadiene-styrene copolymer) or HIPS (high impact polystyrene), and it can also select a mixture of 5%-30% GF (glass fiber) in ABS (acrylonitrile-butadiene-styrene copolymer). These materials have good mechanical strength and hardness, and while effectively reducing the overall weight of the blade assembly, they make the blade assembly not easily bend.

[0007] The knife rest is provided with a blade mounting groove, and the blade is mounted in the blade mounting groove by means such as pasting / clamping. The shape and size of the blade mounting groove precisely match the outer shape of the blade to ensure that the blade can be stably mounted on the knife rest. Optionally, the inner wall of the mounting groove is smoothed to reduce the friction during the installation and use of the blade and reduce wear.

[0008] Optionally, the blade mounting groove and the knife rest are integrally formed. The advantages involved are: reducing the assembly process of the blade assembly or the processing cartridge, and making the structure of the blade assembly more delicate to ensure good printing quality.

[0009] In the present utility model, the blade is made of a flexible material, such as PU (polyurethane). The advantages of such a design are: the blade made of a flexible material can maintain good adhesion when contacting the photosensitive drum or the developing roller, improving the toner scraping efficiency; at the same time, during long-term use, the wear rate of the flexible material is relatively low, which helps to extend the service life of the blade.

[0010] Preferably, the design of the blade assembly takes into account the structural strength and stability, and a strengthening part is provided on the waste toner blade and / or the toner output blade. Optionally, the strengthening part can be a reinforcing rib and / or a reinforcing column.

[0011] The setting of the strengthening part improves the bearing capacity and anti-deformation ability of the knife rest. The design of the strengthening part not only enhances the structure of the knife rest, but also helps to improve the durability and service life of the blade assembly.

[0012] Preferably, the toner output blade further includes a protruding part that protrudes from the knife rest along the opposite direction of the blade installation. The protruding part is used to support the blade. At the same time, the protruding part can also prevent toner from accumulating between the knife rest and the blade.

[0013] Preferably, the waste toner blade further includes a concave part provided on the knife rest to provide more accommodation space for the waste toner scraped by the waste toner blade.

[0014] In a second aspect, an embodiment of the present utility model provides a processing cartridge, which includes the blade assembly of any one of the foregoing embodiments in the first aspect of the present utility model; the processing cartridge further includes a developing unit and a photosensitive unit.

[0015] Optionally, the developing unit includes a developing frame, a powder bin, and a developing roller. The toner output blade is installed in the developing unit and contacts the developing roller to control the toner output.

[0016] The developing frame is used to provide a stable support structure to ensure the stability of the developing unit. The powder bin is used to store toner and is designed with a structure that facilitates the flow of toner to ensure the smooth supply of toner. The developing roller cooperates with the toner output blade to achieve uniform distribution of toner.

[0017] Optionally, the photosensitive unit includes a photosensitive frame, a waste toner bin, and a photosensitive drum. The waste toner blade is installed in the photosensitive unit and contacts the photosensitive drum to remove excess toner.

[0018] The photosensitive frame is used to provide a stable support structure to ensure the stability of the photosensitive unit. The waste toner bin is used to collect the removed excess toner and is designed with a structure that facilitates waste toner collection and cleaning. The photosensitive drum cooperates with the waste toner blade to effectively remove the excess toner.

[0019] The present utility model adopts a knife rest made of non-metallic material, which effectively reduces the production cost of the blade assembly. The knife rest made of non-metallic material is lighter than the traditional metallic material, which helps to reduce the weight of the printing device. Through the precisely matched blade mounting groove and the flexible material blade, the toner scraping efficiency is improved, and good printing quality is ensured, effectively solving the problems of high cost, large weight, and poor environmental adaptability of the traditional metallic blade. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is a cross-sectional view of the blade assembly and the processing cartridge of the present utility model;

[0022] Figure 2 It is a schematic structural view of the powder discharging blade of the present utility model;

[0023] Figure 3 It is an exploded view of the powder discharging blade of the present utility model;

[0024] Figure 4 It is a schematic structural view of the waste toner blade of the present utility model;

[0025] Figure 5 It is an exploded view of the waste toner blade of the present utility model

[0026] Figure 6 It is a schematic structural view of another waste toner blade of the present utility model.

[0027] Explanation of the Reference Numerals in the Drawings:

[0028] 100 - Blade assembly;

[0029] 101 - Waste toner blade; 102 - Powder discharging blade; 103 - Blade; 104 - Knife rest; 105 - Blade mounting groove;

[0030] 106 - Reinforcement part; 106a - Reinforcing rib; 106b - Reinforcing column;

[0031] 104a - Groove part; 107 - Protrusion; 108 - Recess;

[0032] 200 - Processing cartridge;

[0033] 201 - Developing unit; 202 - Developing frame; 203 - Toner cartridge; 204 - Developing roller;

[0034] 205 - Photosensitive unit; 206 - Photosensitive frame; 207 - Waste toner bin; 208 - Photosensitive drum.

[0035] The realization, functional features and advantages of the present utility model will be further described in conjunction with embodiments with reference to the accompanying drawings. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, inside, outside, etc.) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0039] Embodiment:

[0040] Figure 1 It is a cross-sectional view of the doctor blade assembly and the processing cartridge of the present utility model; Figure 2 It is a structural schematic diagram of the toner doctor blade of the present utility model; Figure 3 It is an exploded view of the toner doctor blade of the present utility model; Figure 4 It is a structural schematic diagram of the waste toner doctor blade of the present utility model; Figure 5 It is an exploded view of the waste toner doctor blade of the present utility model; Figure 6This is a schematic structural diagram of another waste toner blade of the present utility model. In an embodiment of the present utility model, the blade assembly 100 includes: a waste toner blade 101 and / or a powder discharging blade 102. The waste toner blade 101 and / or the powder discharging blade 102 include a blade 103 and a blade holder 104. The processing cartridge 200 includes the blade assembly 100, a developing unit 201, and a photosensitive unit 205. The developing unit 201 includes a developing roller 204. The powder discharging blade 102 is disposed in the developing unit 201 and contacts the developing roller. The photosensitive unit 205 includes a photosensitive drum 208. The waste toner blade 101 is disposed in the photosensitive unit 205 and contacts the photosensitive drum 208.

[0041] In the patent of the present utility model, the blade holder 104 is made of a non-metallic material, preferably ABS (acrylonitrile-butadiene-styrene copolymer) or HIPS (high impact polystyrene). These materials not only have good mechanical strength and hardness, but also have the advantages of light weight, corrosion resistance, and easy processing. In addition, in order to further improve the strength and hardness of the blade holder, ABS (acrylonitrile-butadiene-styrene copolymer) mixed with 5%-30% GF (glass fiber) can also be selected. When the mixed GF (glass fiber) is less than 5%, the tensile strength does not meet the requirements. When the mixed GF (glass fiber) is more than 30%, the material becomes brittle and fragile. Therefore, selecting ABS (acrylonitrile-butadiene-styrene copolymer) mixed with 5%-30% GF (glass fiber) can effectively reduce the overall weight of the blade assembly 100 while making the blade assembly 100 have appropriate hardness and not easy to break.

[0042] As Figure 3 、 Figure 5 shown, the blade holder 104 is provided with a blade mounting groove 105. The blade 103 is mounted in the blade mounting groove 105 by means of pasting / clamping, etc. The shape and size of the blade mounting groove 105 precisely match the outer shape of the blade 103 to ensure that the blade 103 can be stably mounted on the blade holder 104. Optionally, in order to reduce the friction and wear of the blade during installation and use, the inner wall of the mounting groove 105 is also smoothed. This design not only improves the durability of the blade assembly 100, but also reduces the maintenance cost.

[0043] Preferably, in order to further improve the accuracy and stability of the blade assembly 100, the present utility model also adopts the technology of integrally forming the blade mounting groove 105 and the blade holder 104. This technology integrally forms the blade mounting groove 105 and the blade holder 104 into a whole by means of injection molding, die pressing, etc., reducing the assembly process and assembly error, and making the structure of the blade assembly 100 more delicate and compact. At the same time, the integrally formed design also enhances the strength and stiffness of the blade holder 104, improving the durability and service life of the blade assembly 100.

[0044] The blade 103 is the component in the blade assembly 100 that directly contacts the photosensitive drum 208 or the developing roller 204. The selection of its material has a direct impact on the printing quality. In this embodiment, a flexible material such as PU (polyurethane) is used as the material of the blade 103. This material has good elasticity and wear resistance, and can maintain good adhesion when contacting the photosensitive drum 208 or the developing roller 204, thereby improving the toner scraping efficiency. At the same time, the flexible material can also reduce the friction and wear between the blade 103 and the photosensitive drum 208 or the developing roller 204 to a certain extent, and extend the service life of the blade 103 and the photosensitive drum 208 / developing roller 204.

[0045] Preferably, in order to improve the structural strength and stability of the blade assembly 100, a reinforcing portion (106) is also provided on the blade holder in this embodiment. As Figures 4 to 6 , the reinforcing portion can adopt a reinforcing rib 106a, a reinforcing column 106b or other forms of reinforcing structures. These reinforcing structures can effectively improve the load-bearing capacity and anti-deformation ability of the blade holder 104, and ensure that the blade assembly 100 maintains stable performance during long-term use. When using the reinforcing column 106b to improve the load-bearing capacity and anti-deformation ability of the blade holder 104, the reinforcing column 106b can abut against the photosensitive frame 206.

[0046] Preferably, the toner blade 102 further includes a protruding portion 107. The protruding portion 107 protrudes from the blade holder 104 in the opposite direction to the installation direction of the blade 103. This design helps to support the blade 103 and prevent it from being displaced or deformed during operation. At the same time, the protruding portion 107 can also prevent toner from accumulating between the blade holder 104 and the blade 103 to a certain extent, and improve the scraping efficiency.

[0047] Optionally, as Figure 2 shown, a plurality of groove portions 104a are distributed on the toner blade 102. The function of the plurality of groove portions 104a is to reduce the material used as much as possible while ensuring the overall hardness of the blade.

[0048] Preferably, the waste toner blade 101 further includes a concave portion 108. The concave portion 108 is provided on the blade holder 104, providing more accommodation space for the waste toner scraped by the waste toner blade 101.

[0049] The processing cartridge 200 provided by the embodiment of the present invention includes the blade assembly 100 of the foregoing embodiment; and a developing unit 201 and a photosensitive unit 205.

[0050] Optionally, the developing unit 201 includes a developing frame 202, a powder bin 203 and a developing roller 204. The toner blade 102 is installed in the developing unit 201 and contacts the developing roller 204 to control the output amount of toner.

[0051] The developing frame 202 provides a stable support and mounting platform for fixing and accommodating other developing components. The developing frame 202 is usually made of a sturdy and durable material to ensure stable performance and structural integrity during the printing process. The toner cartridge 203 is used to store toner, which contains an appropriate amount of toner for printing. It is usually designed with a structure that facilitates the flow of toner, such as a powder feeding roller / stirring component (not shown in the figure), to ensure smooth supply of toner.

[0052] The powder discharging blade 102 is firmly fixed to the developing frame 202 by welding, pasting or other means, which is not limited here.

[0053] Optionally, the photosensitive unit 205 includes a photosensitive frame 206, a waste toner bin 207 and a photosensitive drum 208. The waste toner blade 101 is installed in the photosensitive unit 205 and contacts the photosensitive drum 208 to remove excess toner.

[0054] The photosensitive frame is used to fix and support components such as the photosensitive drum 208. Similar to the developing frame 202, the photosensitive frame 206 is also made of a sturdy and durable material to ensure stable performance and structural integrity during the printing process. The waste toner bin 207 is used to collect and process the excess toner scraped from the photosensitive drum 208. During the printing process, a certain amount of toner adheres to the surface of the photosensitive drum 208, part of which is the toner actually used for printing, while the other part is the excess or unused toner. The waste toner blade 101 scrapes off this excess toner from the photosensitive drum 208 and collects it into the waste toner bin 207 through a specific path. The photosensitive drum and the waste toner blade cooperate to effectively remove the excess toner.

[0055] The waste toner blade 101 is firmly fixed to the photosensitive frame 206 by welding, pasting or other means, which is not limited here.

[0056] The notch of the recess 108 on the blade holder 104 of the waste toner blade 101 faces the waste toner bin 207, and this design increases the amount of waste toner collected.

[0057] When the printing device starts to work, the photosensitive drum 208 or the developing roller 204 rotates at a set speed. The blade assembly 100 remains stationary, but its blade 103 contacts the photosensitive drum 208 or the developing roller 204 as they rotate.

[0058] As the photosensitive drum 208 or the developing roller 204 rotates, a certain amount of toner adheres to its surface. The blade 103 scrapes off the excess toner adhering to the surface of the photosensitive drum 208 or the developing roller 204 through physical friction. The toner scraped off by the waste toner blade 103 is then collected into the waste toner bin 207 through a specific path (such as a waste toner channel) for subsequent processing or recycling.

[0059] The utility model adopts a tool rest made of non-metallic material, which effectively reduces the production cost of the scraping blade assembly. The tool rest made of non-metallic material is lighter than the traditional metal material, which helps to reduce the weight of the printing device. Through the precisely matched blade mounting groove and the flexible material blade, the toner scraping efficiency is improved, and good printing quality is ensured, effectively solving the problems of high cost, large weight and poor environmental adaptability of the traditional metal scraping blade.

[0060] The above are only the preferred embodiments of the utility model, and do not limit the patent scope of the utility model. Any equivalent structural transformation made by using the content of the specification and drawings of the utility model under the inventive concept of the utility model, or direct / indirect application in other related technical fields shall be included in the patent protection scope of the utility model.

Claims

1. A scraper assembly, which can be installed in a processing box, characterized in that: The scraper assembly comprises: A tool holder, wherein the tool holder is made of non-metallic material; scraper; The blade holder comprises a scraper blade mounting groove, and the scraper blade is mounted in the scraper blade mounting groove; The knife holder and the scraper blade mounting groove are integrally formed.

2. The scraper assembly according to claim 1, characterized in that: The scraper assembly includes a powder discharge scraper and / or a waste powder scraper; The powder discharging scraper and / or the waste powder scraper comprises the blade holder and the scraper blade.

3. The scraper assembly according to claim 2, characterized in that: The blade holder of the waste powder scraper is provided with a reinforcement portion; The reinforcement part is a reinforcement rib and / or a reinforcement column.

4. The scraper assembly according to claim 2 or 3, characterized in that: The powder discharging scraper is provided with a protrusion, and the protrusion protrudes from the blade holder in the opposite direction of the installation of the scraper.

5. The scraper assembly according to claim 2 or 3, characterized in that: The waste powder scraper is provided with a recessed portion, and the recessed portion is arranged on the blade holder.

6. The scraper assembly according to claim 2, characterized in that: The scraper is made of PU material.

7. A processing box, comprising a developing unit and a photosensitive unit, characterized in that: The processing box comprises: The scraper assembly according to any one of claims 1 to 6, wherein the scraper assembly comprises a powder discharge scraper and / or a waste powder scraper; The developing unit comprises a developing frame, a powder bin and a developing roller; The powder discharging scraper is used to be installed in the developing unit, and at least a part of the powder discharging scraper is in contact with the developing roller; The photosensitive unit includes a photosensitive frame, a waste toner bin, and a photosensitive drum; The waste toner scraper is used to be installed in the photosensitive unit, and at least a portion of the waste toner scraper is in contact with the photosensitive drum.

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