Anti-attrition fixing assembly

Abstract

The utility model relates to a fixing component, and provides an anti-attrition fixing component which comprises a shell, a mounting seat, a paper guide seat, a paper guide roller group, a fixing rod, a clamping seat, a fixing roller and the like, mounting seats are fixedly arranged on the left side and the right side of the shell, a paper guide seat is connected between the front sides of the lower parts of the mounting seats, a paper guide roller group is rotatably arranged on the lower part of the paper guide seat, fixing rods are arranged on the upper parts of the mounting seats, clamping seats are arranged on the fixing rods in a penetrating manner, the lower parts of the clamping seats are rotatably buckled with the mounting seats on the same side, and a fixing roller is rotatably arranged between the clamping seats. According to the utility model, by adopting the separating claw integrally made of a new material and through the characteristic of the self-repairing surface of the separating claw, the worn surface of the separating claw can be kept in a smooth state in the continuous contact process of the separating claw and the fixing roller, so that carbon powder is prevented from being adsorbed by a rough friction surface generated after the metal or coating material of the traditional separating claw is worn; when the fixing roller does not reach the working temperature, the hard carbon powder blocks scrape and damage the surface of the fixing roller, the friction damage of the fixing roller is reduced, and the service life of the fixing assembly is prolonged.

Description

Technical Field

[0001] This utility model relates to a fixing assembly, and more particularly to a friction-reducing fixing assembly. Background Technology

[0002] The fusing assembly of printers and copiers mainly uses two structures: fusing film or fusing roller. Fusing film technology can achieve high fusing quality due to its uniform heat conduction characteristics, but its durability and cost control are challenged due to limitations in material properties and complex structure. While the fusing roller solution has the advantages of simple structure, low cost and durability, it relies on a contact separation mechanism in practical applications, and long-term operation can easily cause wear on the surface coating of the fusing roller, which limits its overall service life.

[0003] When printers are in use, the fusing assembly is under high temperature and high pressure for a long time. Although the existing mainstream fusing roller solutions are simple in structure and low in cost, the separation mechanism they rely on has significant defects: traditional contact separation claws need to be pressed against the surface of the fusing roller by springs, and rely on the high hardness and sharp edges of the coated material to achieve paper separation through reverse friction. Although the short-term anti-paper jam effect is acceptable, after long-term operation, the coating on the surface of the separation claws and the fusing roller will wear down severely, causing the coating to fall off; the rough friction surface of the worn separation claws will adsorb toner, and when the fusing roller is operating at low temperature, the unsoftened hard toner adhering to the separation claws will deepen the scratches on the surface of the fusing roller, which will seriously shorten the life of the fusing roller; while non-contact separation plates reduce physical wear through micro-gap design, they are easily affected by environmental humidity and paper type, and the risk of separation failure increases sharply in humid or thin paper scenarios.

[0004] In the existing technology, the contradictory relationship between the separating claw and the fixing roller is particularly prominent: while the contact pressure is needed to ensure the reliability of separation, the high rigidity of the materials and the large coefficient of friction result in the two being in a state of antagonistic wear for a long time. In addition, the design of more than two separating claws densely distributed further increases the friction area and accelerates the damage to the fixing roller coating. Although the production process of the high temperature resistant non-stick coating of the fixing roller has become mature, the material and structural shortcomings of the separation mechanism have become the core bottleneck restricting its service life. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the objective is to provide a friction-reducing fixing assembly. The technical solution is as follows: A friction-reducing fixing assembly includes a housing, mounting bases, a paper feed base, a paper guide roller assembly, fixing rods, mounting brackets, a fixing roller, an active pressure roller, a connecting plate, a mounting frame, and separation claws. Mounting bases are fixedly mounted on both the left and right sides of the housing. A paper feed base is connected between the lower front sides of the mounting bases. A paper guide roller assembly is rotatably mounted below the paper feed base. Fixing rods are mounted on the upper parts of the mounting bases, and mounting brackets are threaded through the fixing rods. The lower parts of the mounting brackets are rotatably fastened to the mounting bases on the same side. A fixing roller is rotatably mounted between the mounting brackets. An active pressure roller is rotatably mounted between the rear parts of the mounting bases. A connecting plate is located between the lower parts of the mounting bases. Mounting frames are mounted on both the left and right sides of the connecting plate. Separation claws are mounted on the mounting frames. The working surfaces of the upper parts of the separation claws are in contact with the surface of the fixing roller, and the separation claws are integrally made of polytetrafluoroethylene (PTFE) or PEEK material.

[0006] As a further preferred option, the separation claws are positioned to correspond to the non-graphic areas on both sides during the paper feeding process.

[0007] As a further preferred option, the contact width between the working surface of the separation claw and the fixing roller is 3mm-4mm.

[0008] As a further preferred option, the end of the separating claw is provided with an arc-shaped guide, the curvature of which matches the surface curvature of the fixing roller.

[0009] As a further preferred embodiment, it also includes elastic elements. The separating claws are rotatably mounted on the mounting frame, and the mounting frame is equipped with elastic elements. The separating claws are elastically connected to the mounting frame through the elastic elements, and the elastic elements provide the separating claws with a preset clamping force toward the fixing roller.

[0010] As a further preferred embodiment, it also includes a fixed base, a cleaning roller, a slider, a magnetic component, and a magnetic block. Fixed bases are installed on both the left and right sides of the lower part of the mounting base. Each fixed base has a groove. A slider is slidably installed in each groove. A cleaning roller is rotatably installed between the sliders. The cleaning roller makes rolling contact with the fixing roller. Each slider is equipped with a magnetic component, and a magnetic block is installed in each groove of the fixed base.

[0011] The present invention has the following advantages: 1. The present invention uses a separation claw made of polytetrafluoroethylene or PEEK material in one piece. Through its self-healing surface characteristics, the wear surface can remain smooth during continuous contact with the fuser roller. This not only avoids the adsorption of toner on the rough friction surface caused by the wear of metal or coating materials of traditional separation claws, but also prevents the scraping damage to the surface of the fuser roller caused by hard toner that has not been softened at high temperature when the fuser roller is working at low temperature. This reduces the friction damage to the fuser roller and greatly extends the service life of the fuser assembly.

[0012] 2. This utility model uses only two separating claws distributed on the left and right sides to correspond to the non-image areas of the paper. During the printing process, it maintains the function of separating the paper while reducing the number of separating claws to reduce the contact and wear area with the fuser roller. Even if the separating claws cause wear to the fuser roller, the integrity of the image area can be protected first, reducing interference with the printing quality.

[0013] 3. This utility model features a quick-release cleaning roller mechanism on the fixing assembly, allowing for rapid disassembly without the need for tools during maintenance. This significantly reduces maintenance time, avoids accidental damage to precision components during disassembly, and improves equipment lifespan and cleaning efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is an exploded view of the components of this utility model.

[0016] Figure 3 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0017] Figure 4 This is a three-dimensional structural diagram of the fixing roller and separating claw mechanism of this utility model.

[0018] Figure 5 This is an exploded view of the separating claw mechanism of this utility model.

[0019] Figure 6 This is an exploded view of the cleaning roller mechanism of this utility model.

[0020] Wherein: 1-shell, 2-mounting base, 21-paper feeder, 22-paper guide roller assembly, 3-fixing rod, 4-card holder, 5-fusing roller, 6-active pressure roller, 7-connecting plate, 71-mounting frame, 72-separation claw, 73-elastic element, 8-fixing base, 81-cleaning roller, 82-slider, 83-magnetic element, 84-magnetic block. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "setting," "installing," "connecting," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0022] Example 1

[0023] A friction-reducing fixing component, such as Figure 1-5 As shown, the assembly includes a housing 1, a mounting base 2, a paper feed seat 21, a paper guide roller assembly 22, a fixing rod 3, a retaining bracket 4, a fixing roller 5, an active pressure roller 6, a connecting plate 7, a mounting frame 71, and a separating claw 72. Mounting bases 2 are fixedly mounted on both the left and right sides of the housing 1 to provide structural support for the entire fixing assembly, ensuring that all components maintain a stable and precise positional relationship during operation. A fixing rod 3 is mounted on the upper part of each mounting base 2, and a retaining bracket 4 passes through each fixing rod 3. The lower part of the retaining bracket 4 is rotatably fastened to the mounting base 2 on the same side. During the installation of the fixing assembly, a spring is fitted over the fixing rod 3, and the spring is secured by fasteners. The card holder 4 is fixed to a fixed rod, and a continuous elastic pressure is applied to the upper part of the card holder 4 by a spring. This connection method allows the card holder 4 to adaptively brake and adjust its position on the mounting base 2 to accommodate paper of different sizes, while ensuring a firm connection between it and the mounting base 2. A fixing roller 5 is rotatably installed between the card holder 4 and an active pressure roller 6 is rotatably installed between the rear parts of the mounting base 2. The active pressure roller 6 and the fixing roller 5 are in contact to form a heating and pressurizing working area. The paper is fed downward from the upper part of the housing 1 between the fixing roller 5 and the active pressure roller 6. Under the action of heating and pressurization, the fixing process is completed, and the paper continues to be conveyed downward.

[0024] A connecting plate 7 is provided between the lower parts of the mounting base 2. Mounting brackets 71 are provided on both the left and right sides of the connecting plate 7. Separating claws 72 are installed on the mounting brackets 71. The working surface of the upper part of the separating claws 72 is in contact with the surface of the fuser roller 5. The separating claws 72 are made of polytetrafluoroethylene or PEEK material in one piece. This material has excellent wear resistance and self-lubricating properties, which can keep the friction surface smooth during long-term contact with the fuser roller 5. This effectively avoids the problem of toner adsorption on the rough surface caused by coating wear of traditional separating claws, thereby reducing scratch damage to the surface of the fuser roller 5 and greatly extending the service life of the fuser assembly.

[0025] like Figure 1-3 As shown, a paper feeder 21 is connected between the lower front side of the mounting base 2, and a paper feeding and conveying tool is provided on it. A paper guide roller group 22 is rotatably provided at the lower part of the paper feeder 21 so that the paper can be conveyed from the lower part out of the fixing area.

[0026] As the paper is conveyed downwards, it is guided by the separating claws 72 to smoothly detach from the surface of the fuser roller 5 and continue to be conveyed downwards. Finally, it is guided by the paper feeder 21 and the paper guide roller group 22 to the paper conveying line inside the printer for further conveying. The main function of the separating claws 72 is to prevent the paper from sticking to the fuser roller 5 due to various factors, thereby preventing paper jams. In addition, the position of the separating claws 72 corresponds to the non-image areas on both sides of the paper during printing. In this way, not only is the number of separating claws 72 reduced, and the contact and wear area with the fuser roller 5 is reduced, but the integrity of the image area is also prioritized, reducing interference with print quality.

[0027] The contact width between the working surface of the separating claw 72 and the fixing roller 5 is 3mm-4mm. This range is customized to meet different working conditions. This avoids excessive contact that could lead to increased friction and wear, and also prevents excessive contact that could cause paper separation failure. This provides a suitable contact surface for the separating claw 72 and the fixing roller 5. In addition, the end of the separating claw 72 is provided with an arc-shaped guide part. The arc of the guide part matches the curvature of the surface of the fixing roller 5, which allows the separating claw 72 to fit more tightly against the surface of the fixing roller 5, enhancing the guiding performance and reducing unnecessary stress concentration.

[0028] like Figure 4 and Figure 5 As shown, it also includes an elastic element 73. The separating claws 72 are all rotatably mounted on the mounting frame 71, and the mounting frame 71 is provided with an elastic element 73. The separating claws 72 are elastically connected to the mounting frame 71 through the elastic element 73. The elastic element 73 provides a preset clamping force for the separating claws 72 toward the fixing roller 5. This design not only ensures reliable contact between the separating claws 72 and the fixing roller 5, but also automatically adjusts the contact pressure and position according to the actual working conditions and wear, avoiding damage to the surface of the fixing roller 5 due to excessive pressure, and also reducing the wear of the separating claws 72 themselves.

[0029] Specifically, the separation claw 72, made of a new material in one piece, has the characteristic of self-healing surface. During continuous contact with the fuser roller 5, its wear surface can always remain smooth, effectively avoiding the problem of toner adsorption caused by the rough friction surface of traditional separation claws after wear of metal or coating materials. It avoids the traditional contact-type separation components. When the fuser roller 5 is working at low temperature, the scratching damage to the surface of the fuser roller 5 caused by hard toner clumps that have not reached the softening temperature is greatly reduced, thereby significantly reducing the friction damage of the fuser roller 5 and extending the service life of the fuser assembly. Finally, by designing two left and right distributed separation claws 72 corresponding to the non-image areas of the paper, while maintaining the paper separation function, the number of separation claws 72 and their contact and wear areas with the fuser roller 5 are reduced. Priority is given to protecting the integrity of the image area, reducing interference with print quality, and improving the overall working reliability and print quality of the fuser assembly.

[0030] Example 2

[0031] Based on Example 1, such as Figure 2 , Figure 3 and Figure 6 As shown, it also includes a fixed base 8, a cleaning roller 81, a slider 82, a magnetic component 83, and a magnetic block 84. Specifically, fixed bases 8 are installed on both the left and right sides of the lower part of the mounting base 2. The fixed base 8 has a sliding groove inside, and the slider 82 is slidably arranged in the sliding groove. The cleaning roller 81 is rotatably installed between the sliders 82. The cleaning roller 81 maintains rolling contact with the fixing roller 5, so that the residual toner or other impurities on the surface of the fixing roller 5 can be removed in real time during the paper transport process, ensuring the stability of the fixing effect.

[0032] In addition, such as Figure 6 As shown, each slider 82 is equipped with a magnetic component 83, and each groove of the fixed seat 8 is equipped with a magnetic block 84. The magnetic component 83 is attached to the magnetic block 84 on the same side. Through the magnetic force between the magnetic component 83 and the magnetic block 84, the cleaning roller 81 mechanism can be quickly assembled and disassembled.

[0033] After the paper passes between the fuser roller 5 and the active pressure roller 6 and is fixed, the cleaning roller 81, due to its rolling contact characteristics with the fuser roller 5, can promptly remove residual toner particles or other impurities from the surface of the fuser roller 5, preventing these residues from accumulating too much and affecting subsequent printing quality. At the same time, the magnetic structure allows the cleaning roller 81 to be quickly installed and removed from the slide groove. During operation, it remains fixed. When deep cleaning or replacement of the cleaning roller 81 is required, the slider 82 can be easily pulled out from the slide groove of the fixed seat 8, thereby driving the cleaning roller 81 away from the surface of the fuser roller 5. The entire process can be completed using only the magnetic force between the magnetic component 83 and the magnetic block 84, without the need for additional tools, greatly facilitating the user's daily maintenance operations.

[0034] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present application. Therefore, the content of this specification should not be construed as a limitation of the present application.

Claims

1. A friction-reducing fixing assembly, comprising a housing (1); Its features are: It also includes a mounting base (2), a paper feed seat (21), a paper guide roller assembly (22), a fixing rod (3), a clamping seat (4), a fixing roller (5), an active pressure roller (6), a connecting plate (7), a mounting frame (71), and a separating claw (72). Mounting bases (2) are fixedly provided on both the left and right sides of the housing (1). A paper feed seat (21) is connected between the lower front sides of the mounting base (2). A paper guide roller assembly (22) is rotatably provided at the lower part of the paper feed seat (21). A fixing rod (3) is provided on the upper part of the mounting base (2). A clamping seat (4) is passed through the fixing rod (3). The lower part of the card holder (4) is rotatably fastened to the mounting base (2) on the same side. The card holder (4) is rotatably provided with a fixing roller (5). The rear part of the mounting base (2) is rotatably provided with an active pressure roller (6). The lower part of the mounting base (2) is provided with a connecting plate (7). The left and right sides of the connecting plate (7) are provided with mounting brackets (71). The mounting brackets (71) are all equipped with separation claws (72). The working surface of the upper part of the separation claws (72) is in contact with the surface of the fixing roller (5). The separation claws (72) are made of polytetrafluoroethylene or PEEK material in one piece.

2. The anti-friction fixing assembly as described in claim 1, characterized in that: The separation claw (72) is positioned to correspond to the non-graphic areas on both sides during the paper feeding process.

3. The anti-friction fixing assembly as described in claim 2, characterized in that: The contact width between the working surface of the separating claw (72) and the fixing roller (5) is 3mm-4mm.

4. The anti-friction fixing assembly as described in claim 3, characterized in that: The separation claw (72) has an arc-shaped guide at its end, the curvature of which matches the surface curvature of the fixing roller (5).

5. A friction-reducing fixing assembly as described in claim 4, characterized in that: It also includes an elastic element (73), and the separation claws (72) are rotatably mounted on the mounting frame (71). The mounting frame (71) is provided with an elastic element (73). The separation claws (72) are elastically connected to the mounting frame (71) through the elastic element (73). The elastic element (73) provides the separation claws (72) with a preset clamping force toward the fixing roller (5).

6. The anti-friction fixing assembly as described in claim 5, characterized in that: It also includes a fixed base (8), a cleaning roller (81), a slider (82), a magnetic component (83), and a magnetic block (84). Fixed bases (8) are installed on the left and right sides of the lower part of the mounting base (2). Each fixed base (8) has a groove. Each groove has a slider (82) that slides in a sliding manner. The cleaning roller (81) is rotated between the sliders (82). The cleaning roller (81) rolls in contact with the fixing roller (5). Each slider (82) has a magnetic component (83). Each groove of the fixed base (8) has a magnetic block (84).

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