Low-coverage-rate printing structure of selenium drum

Abstract

The utility model relates to the technical field of selenium drums, in particular to a low-coverage printing structure of a selenium drum. Comprising a toner inlet channel which is fixedly connected to the top of a shell and extends into a toner bin; the material conveying and stirring frame is rotationally connected into the powdered ink bin, and spiral frame structures with opposite spiral directions are arranged on the material conveying and stirring frame to form a bidirectional pushing structure; the first gear is fixedly connected to a part rotating shaft, close to the ink powder bin side, in the printing assembly; and the second gear is fixedly connected to the rotating shaft of the material conveying stirring frame, and the first gear and the second gear are meshed with each other to achieve power transmission. According to the utility model, through the continuous bidirectional stirring function of the conveying stirring frame, the powdered ink can be ensured to be uniformly distributed in the axial direction of the developing roller subsequently, so that the defects of strip blank, light color and the like on a printed page caused by local powder shortage are effectively eliminated, and the output uniformity and stability of a low-coverage-rate document are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a selenium drum technical field especially, relate to a structure of selenium drum low coverage printing. BACKGROUND

[0002] Selenium drum is the core imaging component of laser printing equipment, with the photosensitive characteristic of light guide material, digital information is converted into final paper image. It is mainly composed of photosensitive drum, charging roller, developing roller and toner bin etc., when working, the charging roller makes the photosensitive drum electrified first, then laser exposes on the photosensitive drum according to printing data, forms latent image. Developing roller delivers toner to photosensitive drum, forms toner image, finally through charging roller, toner image is transferred to paper and fixed, completes the whole printing process.

[0003] In part certain office scene, because long-term low coverage printing (such as small amount of text report, mail printing etc.), developing roller only consumes toner in its axis local area. And toner feeding structure is mostly delivered from the rear end to the front end of the bin, lacks effective axial stirring and distribution function, which leads to the serious localization and imbalance phenomenon of toner consumption in powder bin, that is, the consumed area cannot replenish toner in time, and the toner in the non-consumed area is long-term static accumulation. This situation can make the printing page appear strip-shaped blank or light color area, seriously affect the output quality. At the same time, due to uneven toner consumption, even if there is still toner in the bin, it cannot be effectively utilized due to distribution problem, causing obvious toner waste, not only greatly shortening the actual printing life of selenium drum, but also increasing the cost of single page printing. For this, users often need to manually shake selenium drum to temporarily alleviate the problem, but the operation is inconvenient, and there is the risk of toner leakage. UTILITY MODEL CONTENT

[0004] In order to overcome the shortcomings, the utility model aims at providing. The utility model provides a structure of selenium drum low coverage printing in view of the defects of prior art, to optimize the toner distribution efficiency under low coverage printing mode, so as to ensure the stability of printing quality.

[0005] The technical scheme is as follows: a structure for low-coverage printing of a selenium drum, comprising: a shell, which is divided into three sub-zones, an ink powder bin for storing new powder, a waste powder bin for collecting waste powder, and a mounting bin; a printing assembly arranged in the mounting bin in the shell, for taking out the ink powder in the ink powder bin to perform a printing operation, the core of which comprises a photosensitive drum, a developing roller, and a charging roller, and power transmission is achieved through gear sets meshing with each other; the structure further comprises: a powder inlet channel fixedly connected to the top of the shell and extending into the ink powder bin; a material conveying and stirring frame rotatably connected in the ink powder bin, which is provided with spiral frame structures with opposite spiral directions, forming a bidirectional pushing structure; a first gear fixedly connected to the shaft of a component of the printing assembly near the ink powder bin; and a second gear fixedly connected to the shaft of the material conveying and stirring frame, the first gear and the second gear meshing with each other to achieve power transmission.

[0006] As a further preferred scheme, the powder inlet channel is located at the central position of the ink powder bin, and two outlets are symmetrically formed at the end of the powder inlet channel.

[0007] As a further preferred scheme, the structure further comprises: at least three groups of blockage cleaning stirring frames rotatably connected in the waste powder bin and uniformly distributed along the axial direction of the waste powder bin, one end of each group of blockage cleaning stirring frames having a larger diameter than the other end, and the end with the larger diameter being arranged towards the opening of the waste powder bin; a third gear fixedly connected to the shaft of a component of the printing assembly near the waste powder bin, the third gear meshing with the existing gear structure inside the printing assembly; a transmission shaft rotatably connected in the waste powder bin; a bevel gear set correspondingly arranged between each group of blockage cleaning stirring frames and the transmission shaft, each group of bevel gear sets comprising two bevel gears meshing with each other perpendicularly, one of which is coaxially fixed with the smaller-diameter end of the blockage cleaning stirring frame, and the other of which is coaxially fixed with the transmission shaft; and a transmission belt set arranged between the transmission shaft and the third gear to achieve power transmission.

[0008] As a further preferred scheme, the structure further comprises: at least two groups of scrapers fixedly connected to the material conveying and stirring frame, in contact with the inner wall of the ink powder bin, and symmetrically arranged with the central axis of the material conveying and stirring frame as a reference.

[0009] As a further preferred scheme, the structure further comprises: a static electricity removing roller fixedly connected in the material conveying and stirring frame, connected to the shell through a conductive path, and removing static electricity on the material conveying and stirring frame through grounding.

[0010] As a further preferred scheme, the structure further comprises: a protective cover fixedly connected in the waste powder bin, for covering the bevel gear set.

[0011] The utility model has the following advantages: the utility model discloses a continuous bidirectional stirring function of the material conveying and stirring frame, ensures that toner can be evenly distributed in the axial direction of the developing roller, thereby effectively eliminating the strip-shaped blank, light color and other defects caused by local toner deficiency on the printed page, ensuring the uniformity and stability of low-coverage document output, and enabling all toner in the toner cartridge to be fully utilized, avoiding structural waste caused by the "tunnel effect", effectively consuming toner, and reducing the cost of single-page printing by increasing the actual number of printed pages.

[0012] The utility model discloses a rotating unblocking stirring frame for treating waste powder located at the waste powder bin opening, effectively preventing waste powder from accumulating near the waste powder bin opening and causing blockage, and using the conical structure of the unblocking stirring frame to push the waste powder from the opening to the deep part of the bin, preventing the waste powder from leaking out, thereby ensuring the use effect of the waste powder bin during the entire service life. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the whole structure schematic diagram of the utility model.

[0014] Fig. 2 It is the internal structure schematic diagram after the utility model is cut open.

[0015] Fig. 3 It is the connecting structure schematic diagram of the unblocking stirring frame of the utility model.

[0016] Label name in the drawing: 1 - shell, 2 - toner bin, 3 - powder inlet channel, 4 - first gear, 5 - second gear, 6 - material conveying and stirring frame, 7 - scraper, 8 - waste powder bin, 9 - third gear, 10 - transmission belt group, 11 - transmission shaft, 12 - bevel gear set, 13 - unblocking stirring frame, 14 - static electricity removing roller, 15 - protective cover, 16 - printing assembly. DETAILED DESCRIPTION

[0017] The technical solutions will be further described below in combination with specific embodiments, and it should be noted that the words such as up, down, left, right and the like indicating directions in the present text are only for the positions of the shown structures in the corresponding drawings. The serial numbers of the components in the present text, such as first, second and the like, are only used to distinguish the described objects, and do not have any sequence or technical meaning. The connection and coupling mentioned in the present application include direct and indirect connection (coupling) unless otherwise specified.

[0018] Embodiment: a structure for low-coverage printing of selenium drum, refer to Figs. 1-3, including: the shell 1, which is divided into three sub-zones for storing new powder toner bin 2, for collecting waste powder waste powder bin 8, and installation bin; print assembly 16, assembled in the installation bin in the shell 1, for taking out the toner bin 2 toner printing job, its core includes photosensitive drum, developing roller and charging roller, and power transmission through gear set meshing with each other, the structure into the printer, the printer will power to print assembly 16 to complete the printing job; powder channel 3, fixedly installed on the top of the shell 1, which is located in the central position of the toner bin 2, and extends into the toner bin 2, which can be supplemented by the powder channel 3, and the distal end is symmetrically provided with two exits for simultaneously and uniformly supplementing the toner bin 2 on both sides; material conveying and stirring frame 6, rotatably installed in the toner bin 2, which is provided with two groups of spiral structures with opposite spiral directions, forming a bidirectional pushing structure; first gear 4, fixedly installed on the shaft of the component near the toner bin 2 side of the print assembly 16, such as the developing roller; second gear 5, fixedly installed on the shaft of the material conveying and stirring frame 6, the first gear 4 and the second gear 5 are meshed with each other to realize power transmission.

[0019] When the printing job starts, the printer drives the print assembly 16 to operate, and the operating power is transmitted through the transmission structure of the first gear 4 and the second gear 5 to drive the material conveying and stirring frame 6 to rotate synchronously; and the two groups of reverse spiral structure on the material conveying and stirring frame 6 will form axial pushing force in opposite directions when rotating, so as to push the toner to continuously and uniformly move in both directions in the toner bin 2; which is embodied in that in the area where the toner stock is relatively large, the material conveying and stirring frame 6 will push the excess toner to the area where the toner stock is relatively small by directly contacting with the toner; and in the area where the toner stock is relatively small, it will receive the toner pushed from the other area; through this dynamic adjustment process, the toner in the toner bin 2 can finally maintain a uniform distribution state.

[0020] The structure ensures that the toner can be uniformly distributed in the axial direction of the developing roller through the continuous bidirectional stirring function of the material conveying and stirring frame 6, thereby effectively eliminating the defects such as strip-shaped blank and light color on the printed page caused by local powder shortage, and ensuring the uniformity and stability of low coverage document output; and all toner in the toner bin 2 can be fully utilized, avoiding structural waste caused by "tunnel effect", effectively consuming toner, and reducing the cost of single-page printing by increasing the actual number of printed pages.

[0021] Referring to Figs. 2-3The structure further comprises: five groups of jam-clearing stirring frames 13, which are rotatably installed in the waste powder bin 8 and evenly distributed along the axial direction of the waste powder bin 8, and adopt a conical structure, i.e., the diameter of one end is larger than that of the other end, and the end with the larger diameter is arranged towards the bin opening of the waste powder bin 8; a third gear 9, which is fixedly installed on the shaft of a component, such as a photosensitive roller, of the printing assembly 16 close to the side of the waste powder bin 8, and meshes with the existing gear structure inside the printing assembly 16 to obtain driving force from the printer; a transmission shaft 11, which is rotatably installed in the waste powder bin 8; five groups of bevel gear sets 12, which are correspondingly arranged between each group of jam-clearing stirring frames 13 and the transmission shaft 11, and each group of bevel gear sets 12 comprises two bevel gears that are perpendicular to each other and mesh with each other, one of which is coaxially fixed with the smaller-diameter end of the jam-clearing stirring frame 13, and the other of which is coaxially fixed with the transmission shaft 11; and a transmission belt set 10, which is assembled between the transmission shaft 11 and the third gear 9, and comprises two transmission wheels and a transmission belt wound between the transmission wheels, one of which is fixed on the transmission shaft 11, and the other of which is coaxially fixed with the third gear 9.

[0022] When the printing assembly 16 is working, power is sequentially transmitted through the third gear 9, the transmission belt set 10, the transmission shaft 11, and finally all the jam-clearing stirring frames 13 are driven to rotate synchronously by the bevel gear sets 12, so as to process the waste powder located at the bin opening of the waste powder bin 8, effectively prevent the waste powder from accumulating near the bin opening of the waste powder bin 8 and causing blockage, and push the waste powder from the bin opening to the deep part of the bin by the conical structure of the jam-clearing stirring frame 13, thereby preventing the waste powder from leaking out and ensuring the use effect of the waste powder bin 8 during the entire service life.

[0023] Referring to Figs. 2-3 The structure further comprises: two groups of scrapers 7, which are fixedly installed on the material conveying stirring frame 6, in contact with the inner wall of the toner bin 2, and symmetrically arranged with the central axis of the material conveying stirring frame 6 as the reference. While the material conveying stirring frame 6 rotates, the scrapers 7 rotate with it, and the edges thereof continuously scrape the inner wall of the toner bin 2, effectively stripping the toner attached to the bin wall of the toner bin 2 due to electrostatic factors, on the one hand, making the toner flow more smoothly and completely, and on the other hand, ensuring that there is no residual toner in the toner bin 2, thereby improving the use rate of toner.

[0024] Referring to Figs. 2-3 The structure further comprises: an electrostatic discharge roller 14, which is fixedly installed in the material conveying stirring frame 6 and connected to the housing 1 through a conductive path, and discharges the static electricity generated by the material conveying stirring frame 6 during rotation and stirring by grounding, so as to effectively avoid the "toner sticking" phenomenon caused by the toner adhering to the surface of the material conveying stirring frame 6, thereby reducing unnecessary toner waste, ensuring that the toner is efficiently conveyed to the developing roller to participate in printing, and further improving the use rate of toner.

[0025] Referring to Figs. 2-3Further comprising: a protective cover 15 fixedly installed in the waste powder bin 8, used for covering the bevel gear set 12, guaranteeing the smoothness and stability of the transmission structure, and ensuring that the clearing and stirring frame 13 can continuously and stably work.

[0026] The above has carried out the detailed introduction to the application, the principle and implementation mode of the application are set forth by applying specific examples in this paper, the above example is only used for helping understanding the method and core idea of the application; at the same time, for the general technical personnel in the art, according to the idea of the application, the specific implementation mode and application range will have the change, and the above is described, the content of the specification should not be understood as the limitation of the application.

Claims

1. A structure for low coverage printing of a selenium drum, comprising: The shell (1) is divided into three parts, a toner cartridge (2) for storing new powder, a waste powder cartridge (8) for collecting waste powder, and a mounting cartridge; a printing assembly (16) is arranged in the mounting cartridge in the shell (1) and is used for taking out toner in the toner cartridge (2) to perform a printing operation, and the core includes a photosensitive drum, a developing roller and a charging roller, and power transmission is achieved through gear engagement; characterized in that: the structure further comprises: a powder inlet channel (3) fixedly connected to the top of the shell (1) and extending into the toner cartridge (2); a material conveying and stirring frame (6) rotatably connected in the toner cartridge (2) and provided with spiral frame structures in opposite directions to form a bidirectional pushing structure; a first gear (4) fixedly connected to the shaft of a component of the printing assembly (16) near the toner cartridge (2); and a second gear (5) fixedly connected to the shaft of the material conveying and stirring frame (6), wherein the first gear (4) and the second gear (5) are engaged with each other to achieve power transmission.

2. The structure of low coverage printing of a selenium drum according to claim 1, wherein: The powder inlet channel (3) is located at the central position of the toner cartridge (2), and two outlets are symmetrically formed at the end of the powder inlet channel (3).

3. The structure of low coverage printing of a selenium drum according to claim 1, wherein: The structure further comprises: at least three groups of unblocking stirring frames (13) rotatably connected in the waste powder cartridge (8) and uniformly distributed along the axial direction of the waste powder cartridge (8), wherein one end has a larger diameter than the other end, and the end with the larger diameter is arranged towards the opening of the waste powder cartridge (8); a third gear (9) fixedly connected to the shaft of a component of the printing assembly (16) near the waste powder cartridge (8), wherein the third gear (9) is engaged with the existing gear structure inside the printing assembly (16); a transmission shaft (11) rotatably connected in the waste powder cartridge (8); a bevel gear set (12) correspondingly arranged between each group of unblocking stirring frames (13) and the transmission shaft (11), wherein each group of bevel gear sets (12) includes two bevel gears engaged with each other, one of which is coaxially fixed with the smaller diameter end of the unblocking stirring frame (13), and the other is coaxially fixed with the transmission shaft (11); and a transmission belt set (10) arranged between the transmission shaft (11) and the third gear (9) to achieve power transmission.

4. The structure of low coverage printing of a selenium drum according to claim 1, wherein: The structure further comprises: at least two groups of scrapers (7) fixedly connected to the material conveying and stirring frame (6) and in contact with the inner wall of the toner cartridge (2), and symmetrically arranged based on the central axis of the material conveying and stirring frame (6).

5. The structure of low coverage printing of a selenium drum according to claim 1, wherein: The structure further comprises: an electrostatic roller (14) fixedly connected in the material conveying and stirring frame (6) and connected to the shell (1) through a conductive path to discharge static electricity on the material conveying and stirring frame (6) through grounding.

6. The structure of low coverage printing of a selenium drum according to claim 3, wherein: The structure further comprises: a protective cover (15) fixedly connected in the waste powder cartridge (8) and used for covering the bevel gear set (12).

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