Selenium drum capable of being preheated

Abstract

The utility model discloses a selenium drum capable of being preheated, which relates to the technical field of selenium drums and comprises a drum frame, a charging roller and a photosensitive drum core, the charging roller and the photosensitive drum core are parallel to each other and rotatably mounted on the drum frame, the photosensitive drum core comprises a drum barrel, a drum disc and a transmission gear, and a heating wire is wound on a connecting rod in the drum barrel, is connected with the charging roller in parallel and is fixed at two ends of the drum frame through a connecting column; according to the utility model, accurate and efficient preheating can be realized, the optimal working state can be quickly achieved, the problems of slow temperature rise of the photosensitive drum core and poor quality of the first printed toner cartridge at low temperature or at the beginning of startup of the conventional toner cartridge are solved, the preheating time is shortened, and the printing starting speed and quality are improved; and through a unique heat conduction and air mixing structure, such as a metal heat conduction cylinder on the inner wall of the drum and different fan blades, hot air is effectively stirred, the temperature is uniform, the printing stability is guaranteed, the energy-saving and environment-friendly advantages are achieved, heating of key components is focused, energy consumption is reduced, the rejection rate caused by the printing quality problem is reduced, cost is saved, and the environment-friendly concept is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of selenium drum, especially a selenium drum with preheating function. BACKGROUND

[0002] In modern office and various printing operation scenes, the selenium drum as the core imaging component of the laser printer, its performance is directly related to the printing quality and efficiency;The selenium drum structure under the prior art is mainly composed of a drum frame, a charging roller, a photosensitive drum core, a carbon powder bin and a developing roller;In terms of working principle, the charging roller first gives the photosensitive drum core uniform charge, and then laser scanning forms an electrostatic latent image on the drum core surface, based on the electrostatic adsorption principle, the developing roller transfers the carbon powder in the carbon powder bin to the latent image area of the drum core, and finally the carbon powder is transferred to the paper by the transfer device to complete printing.

[0003] However, the existing selenium drum has obvious defects;In low temperature environment or initial stage of starting, the problem is particularly prominent;The photosensitive drum core is mostly made of organic photoconductive material, and its photoelectric properties are extremely sensitive to temperature;At low temperature, the activity of the material decreases, and the electron mobility decreases, resulting in uneven distribution of the charge on the surface of the drum core, which greatly reduces the adsorption and transfer effect of the carbon powder;This directly causes the quality problems such as blurred characters, light color, image detail loss, etc. when printing the first or first few files;In order to make the photosensitive drum core reach the appropriate working temperature, the traditional way relies on the heat generated by the printer itself to slowly accumulate, or relies on natural heating, which takes a long time;For modern users who pursue efficient office, each printing waiting means an increase in time cost;Whether it is the frequent file output demand in the office or the urgent task in the peak period of photo and text printing shop, the long preheating waiting time seriously affects the smoothness and efficiency of the work process;Therefore, the present application provides a selenium drum with preheating function. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a selenium drum with preheating function, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] The utility model provides a preheatable selenium drum, including drum frame and parallel charging roller and photosensitive drum core, charging roller and photosensitive drum core all rotate installation on drum frame, photosensitive drum core is by drum cylinder, drum disc and transmission gear constitute, drum disc and transmission gear are coaxial installation respectively in both sides of drum cylinder, the coaxial installation of drum cylinder inner chamber has connecting rod, the periphery of connecting rod is wound and is connected with heating wire, heating wire and both ends of charging roller are connected in parallel, the both ends of connecting rod are coaxially connected with connecting column, two connecting columns are fixedly installed in both ends of drum frame, coaxially set up second round hole on drum disc, coaxially set up first round hole on transmission gear, two connecting columns are coaxially rotatably connected in first round hole and second round hole respectively.

[0007] Preferably, the inner wall of the drum cylinder is coaxially connected with a first metal heat-conducting cylinder or a second metal heat-conducting cylinder.

[0008] Preferably, the inner ring of the second metal heat-conducting cylinder is densely curved inward to form a plurality of first curved fan blades and a plurality of second curved fan blades, and the curved surfaces of the first curved fan blades and the second curved fan blades face opposite directions.

[0009] Preferably, one side of the connecting column is parallel to a temperature sensor, the temperature sensor and the heating wire are connected in parallel, and the outer ends of the two connecting columns are fixedly connected with second conductive magnetic suction heads, and the two second conductive magnetic suction heads are connected with both ends of the heating wire.

[0010] Preferably, the two ends of the charging roller are connected with conductive sheets between the two second conductive magnetic suction heads, and the two conductive sheets are fixedly installed on both ends of the drum frame, one side of the conductive sheet is fixedly installed with two first conductive magnetic suction heads, one of the first conductive magnetic suction heads is connected with one end of the charging roller, and the other first conductive magnetic suction head is connected with the second conductive magnetic suction head.

[0011] Preferably, the inner ring of the first metal heat-conducting cylinder is curved inward to form a plurality of strip-shaped fan blades.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. Precise and efficient preheating, improving printing start-up speed and quality

[0014] 1.1 Quickly Reaching Optimal Working Condition: In existing technologies, toner cartridges require a relatively long time for the photosensitive drum core to reach the appropriate working temperature in low-temperature environments or during the initial startup phase, resulting in poor print quality for the first few pages. This preheatable toner cartridge, by incorporating a heating wire inside the photosensitive drum core, can precisely heat the drum core, allowing it to quickly reach its optimal working temperature. This means that high-quality printed documents can be output immediately after the printer is started, significantly reducing warm-up time and meeting users' needs for rapid printing.

[0015] 1.2 Optimized Toner Adsorption and Transfer: The temperature of the photosensitive drum core plays a crucial role in the adsorption and transfer of toner. This technology uses a temperature sensor to precisely control the temperature of the photosensitive drum core, ensuring uniform surface charge distribution and enhancing its toner adsorption capacity. During the transfer process, the toner can be transferred to the paper more clearly and completely, reducing problems such as blurred text and image distortion caused by temperature incompatibility, and improving print quality.

[0016] 2. Uniform heating design ensures printing stability.

[0017] 2.1 Unique Heat Conduction and Air Mixing Structure: Traditional toner cartridges are prone to uneven temperature distribution during heating, affecting print consistency. This toner cartridge features a first and second metal heat-conducting cylinder on the inner wall of the drum, equipped with fan blades of different shapes. The strip-shaped fan blades of the first metal heat-conducting cylinder and the first and second curved fan blades with opposite orientations inside the second metal heat-conducting cylinder effectively agitate the heated air inside the drum when the drum core rotates, ensuring uniform heat diffusion and preventing localized overheating or undercooling. This guarantees consistent temperature across all parts of the photosensitive drum core, maintaining stable print quality throughout continuous printing and reducing print quality fluctuations caused by temperature differences.

[0018] 3. Energy-saving and environmental protection advantages

[0019] 3.1 Reduced energy consumption: Compared with some existing technologies that heat the entire drum unit over a large area, this technology concentrates the main heat source on the key component, the photosensitive drum core, reducing unnecessary heat loss and energy consumption. In the current context of advocating energy conservation and emission reduction, this energy-saving design not only conforms to the concept of environmental protection but also saves users operating costs.

[0020] 3.2 Reduced scrap rate: Due to precise temperature control and good printing stability, the Benco preheating toner cartridge greatly reduces paper waste and scrap caused by printing quality problems, which reflects environmental benefits and also reduces the user's consumable costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is an exploded view of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the first metal heat-conducting cylinder in this utility model;

[0024] Figure 4 This is a schematic diagram of the heating wire in this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the second metal heat-conducting cylinder in this utility model.

[0026] In the diagram: 1. Drum cylinder; 2. Drum plate; 3. Conductive sheet; 4. First electromagnetic chuck; 5. Transmission gear; 6. Second electromagnetic chuck; 7. Connecting post; 8. First round hole; 9. Second round hole; 10. Temperature sensor; 11. First metal heat-conducting cylinder; 12. Strip fan blade; 13. Heating wire; 14. Connecting rod; 15. Second metal heat-conducting cylinder; 16. First curved fan blade; 17. Second curved fan blade. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0028] like Figures 1-5 As shown, a preheatable toner cartridge includes a drum frame, a charging roller, a photosensitive drum core, a toner cartridge, and a developing roller. The toner cartridge is detachably mounted on the drum frame. The charging roller, photosensitive drum core, and developing roller are all rotatably connected to the drum frame. The drum frame is used to support and fix other components. The charging roller uniformly charges the surface of the photosensitive drum core, giving it a certain charge. The photosensitive drum core is the core of imaging. After laser scanning, it forms an electrostatic latent image based on the degree of exposure, adsorbing toner from the toner cartridge to complete development. However, in traditional toner cartridges, the photosensitive drum core and toner have poor activity in low-temperature environments or at the initial stage of power-on, resulting in affected print quality.

[0029] refer to Figure 1 , Figure 2 and Figure 4 It can be seen that the photosensitive drum core is composed of a drum cylinder 1, a drum plate 2 and a transmission gear 5. The drum plate 2 and the transmission gear 5 are coaxially mounted on both sides of the drum cylinder 1. A connecting rod 14 is coaxially installed in the inner cavity of the drum cylinder 1, and an electric heating wire 13 is wound around its periphery. The electric heating wire 13 is connected in parallel with both ends of the charging roller. The connecting posts 7 at both ends of the connecting rod 14 are fixed to both ends of the drum frame. The drum plate 2 and the transmission gear 5 are provided with a second round hole 9 and a first round hole 8, and the connecting posts 7 are coaxially rotatably connected to them.

[0030] refer to Figure 3 and Figure 5It can be seen that the inner wall of the drum 1 is coaxially fixedly attached to the first metal heat-conducting cylinder 11 or the second metal heat-conducting cylinder 15. The inner ring of the first metal heat-conducting cylinder 11 is fixedly connected with a number of inwardly curved strip-shaped fan blades 12. The inner ring of the second metal heat-conducting cylinder 15 is fixedly connected with a number of dense first curved fan blades 16 and second curved fan blades 17 with opposite bending directions.

[0031] refer to Figure 2 and Figure 4 It can be seen that a temperature sensor 10 is provided on one side of the connecting post 7. The temperature sensor 10 is connected in parallel with the heating wire 13. A second electromagnetic suction head 6 is fixedly connected to the outer end of the connecting post 7. The two second electromagnetic suction heads 6 are connected to the two ends of the heating wire 13. The two ends of the charging roller are connected to the second electromagnetic suction heads 6 through the conductive sheet 3. The conductive sheet 3 is fixed at both ends of the drum frame, and a first electromagnetic suction head 4 is provided on it, which is respectively connected to the charging roller and the second electromagnetic suction head 6.

[0032] It should be added that a membrane heating element can be fitted onto the inner wall of the drum frame and covered with a dustproof film for overall heating of the drum cavity.

[0033] In this invention, when the photosensitive drum core needs to be preheated, the temperature sensor 10, the heating wire 13, the charging roller, and the photosensitive drum core work simultaneously. The heating wire 13 is energized and heats up. At this time, the charging roller and the photosensitive drum core rotate, driving the first metal heat-conducting cylinder 11 or the second metal heat-conducting cylinder 15 to rotate synchronously. The strip-shaped fan blades 12 of the first metal heat-conducting cylinder 11 and the first curved fan blades 16 and the second curved fan blades 17 of the second metal heat-conducting cylinder 15 can mix the hot air inside the drum cylinder 1. The latter can also mix the air at both ends of the inner cavity of the drum cylinder 1, making the heating more uniform.

[0034] Heating the photosensitive drum core separately allows for precise temperature control, enabling it to quickly reach the optimal operating temperature and improve print quality. This is suitable for quickly starting printing tasks and is relatively energy-efficient. Meanwhile, the film heating element on the drum frame heats the entire inner cavity of the drum, stabilizing the internal environment and promoting uniform toner distribution, thus improving the uniformity and stability of continuous printing.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A preheatable toner cartridge, comprising a drum frame and parallel charging rollers and photosensitive drum cores, wherein the charging rollers and photosensitive drum cores are rotatably mounted on the drum frame, and the photosensitive drum core is composed of a drum cylinder (1), a drum plate (2), and a transmission gear (5), wherein the drum plate (2) and the transmission gear (5) are coaxially mounted on both sides of the drum cylinder (1), characterized in that: A connecting rod (14) is coaxially installed in the inner cavity of the drum (1). A heating wire (13) is wound around the outer periphery of the connecting rod (14). The heating wire (13) and the two ends of the charging roller are connected in parallel. The two ends of the connecting rod (14) are coaxially connected to a connecting post (7). The two connecting posts (7) are respectively fixedly installed at the two ends of the drum frame. A second round hole (9) is coaxially provided on the drum plate (2). A first round hole (8) is coaxially provided on the transmission gear (5). The two connecting posts (7) are coaxially rotatably connected in the first round hole (8) and the second round hole (9) respectively.

2. The preheatable toner cartridge according to claim 1, characterized in that: The inner wall of the drum (1) is coaxially connected to either a first metal heat-conducting cylinder (11) or a second metal heat-conducting cylinder (15).

3. The preheatable toner cartridge according to claim 2, characterized in that: The inner ring of the second metal heat-conducting cylinder (15) is densely curved inward and has several first curved fan blades (16) and several second curved fan blades (17), with the curved surfaces of the first curved fan blades (16) and the second curved fan blades (17) facing opposite directions.

4. The preheatable toner cartridge according to claim 1, characterized in that: A temperature sensor (10) is arranged parallel to one side of the connecting post (7). The temperature sensor (10) and the heating wire (13) are connected in parallel. The outer ends of the two connecting posts (7) are fixedly connected to a second electromagnetic suction head (6). The two second electromagnetic suction heads (6) are respectively connected to the two ends of the heating wire (13).

5. The preheatable toner cartridge according to claim 4, characterized in that: The charging roller has conductive plates (3) connected to two second electromagnetic suction heads (6) at both ends. The two conductive plates (3) are fixedly installed at both ends of the drum frame. Two first electromagnetic suction heads (4) are fixedly installed on one side of the conductive plate (3). One first electromagnetic suction head (4) is connected to one end of the charging roller, and the other first electromagnetic suction head (4) is connected to a second electromagnetic suction head (6).

6. The preheatable toner cartridge according to claim 2, characterized in that: The inner ring of the first metal heat-conducting cylinder (11) is bent inward and has several strip-shaped fan blades (12).

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