A sealing structure of a developing roller

Abstract

The utility model relates to a kind of sealing structure of developing roller, including, toner cartridge, waste powder box and developing roller;The front end of waste powder box is provided with the opening of developing roller avoidance, developing roller is located in opening along left-right direction;The lower end of toner cartridge is provided with through-hole for the carbon powder outflow, waste powder box is located at the lower end of toner cartridge and blocks through-hole;Waste powder box is equipped with the flow guide groove of the carbon powder in toner cartridge being guided to the upper portion of developing roller on the upper side wall opposite to through-hole, the left and right sides of flow guide groove are all equipped with the baffle of preventing carbon powder flying out, the upper end of two baffles is all fixedly connected with toner cartridge, lower end is respectively slidably connected with the one side wall of developing roller in circular;Drive shaft is further provided in flow guide groove for driving carbon powder to flow to developing roller;The sealing structure of developing roller provided by the utility model effectively avoids the phenomenon that carbon powder leaks out of toner cartridge during the operation of printer, improves the overall sealing of device.

Description

Technical Field

[0001] This utility model relates to the field of laser printer technology, and in particular to a sealing structure for a developing roller. Background Technology

[0002] Laser printers are common office equipment, operating on the basis of electrophotographic technology. They use a laser beam to write image information onto a photosensitive drum, then electrostatically attract toner to form the image. Finally, heat fixation transfers the image onto paper. Laser printers offer advantages such as high printing speed and low cost, and are widely used in offices and homes. The developing roller is a crucial component of the laser printer's toner cartridge; its main function is to attract toner onto the surface of the photosensitive drum, forming a visible toner image.

[0003] During the process of the developing roller transferring toner from the toner cartridge to the surface of the photosensitive drum, toner leakage may occur due to the gap between the developing roller and the toner cartridge that allows toner particles to pass through, affecting the cleanliness and normal operation of the printer. Therefore, a developing roller sealing structure that can solve the above problem is proposed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a sealing structure for a developing roller, which can effectively solve the aforementioned problems.

[0005] To achieve the above requirements, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A sealing structure for a developing roller is provided, including a toner cartridge, a waste toner cartridge, and a developing roller. The front end of the waste toner cartridge has an opening to avoid the developing roller, and the developing roller is disposed in the opening along the left-right direction. The lower end of the toner cartridge has a through hole for toner to flow out, and the waste toner cartridge is disposed at the lower end of the toner cartridge and blocks the through hole. The upper side wall of the waste toner cartridge opposite to the through hole has a guide groove to guide the toner in the toner cartridge to the upper part of the developing roller. Both sides of the guide groove have baffles to prevent toner from flying out. The upper ends of the two baffles are fixedly connected to the toner cartridge, and the lower ends are slidably connected to a circular side wall of the developing roller. A drive shaft for driving the toner to flow to the developing roller is also provided in the guide groove.

[0007] The present invention discloses a sealing structure for a developing roller, wherein a flow divider is provided on the drive shaft for dividing the toner, one end of the flow divider is provided on the side wall of the drive shaft, and the other end extends away from the rotation direction of the drive shaft.

[0008] The present invention discloses a sealing structure for a developing roller, wherein a strip-shaped guide silicone is fixedly connected to the lower side wall of the front end of the guide groove; the guide silicone is arranged along the length direction of the developing roller; and the end of the guide silicone away from the guide groove is located at the upper part of the developing roller.

[0009] The present invention discloses a sealing structure for a developing roller, wherein the waste toner box is further provided with a cleaning component for cleaning the developing roller.

[0010] This utility model discloses a sealing structure for a developing roller, wherein the cleaning component includes a cleaning roller for cleaning the developing roller; the cleaning roller includes a cylindrical roller body, a roller shaft coaxially disposed on the roller body, and a sponge layer sleeved on the outer peripheral side wall of the roller body; the roller shaft is horizontally disposed in the waste toner box, and the two ends of the roller shaft are respectively rotatably connected to the two opposite side walls of the waste toner box; when installed in place, the sponge layer is tangent to the outer side wall of the developing roller.

[0011] The present invention relates to a sealing structure for a developing roller, wherein a baffle is provided on the lower side wall of the opening to prevent toner from flying out.

[0012] The present invention discloses a sealing structure for a developing roller, wherein the roller shaft of the developing roller is made of a non-conductive coating material, and the roller body of the developing roller is made of a semi-conductive rubber material.

[0013] The beneficial effects of this utility model are as follows:

[0014] The developing roller sealing structure provided by this utility model places a portion of the developing roller inside the waste toner box, allowing the developing roller to adsorb and transport toner in a relatively enclosed environment during rotation. This prevents toner from leaking onto other parts of the printer due to excessive gaps during transport, thus maintaining the cleanliness of the printer's interior and ensuring normal and stable operation. The guide channel and drive shaft design allow toner to flow out of the toner box and be accurately and smoothly transported along the guide channel to the upper part of the developing roller. The drive shaft controls the quantity and speed of toner transport, not only preventing leakage caused by toner accumulation but also reducing toner residue and waste during transport. Furthermore, baffles are provided on both sides of the guide channel to prevent toner from flying out, ensuring the sealing and reliability of print quality. This effectively improves the printer's print quality and has good practicality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a right sectional view of the sealing structure of a developing roller according to this utility model.

[0017] Figure 2 yes Figure 1 Enlarged view of point A.

[0018] Figure 3 This is a front view of the waste toner box in the sealing structure of a developing roller according to this utility model.

[0019] Figure 4 This is a right view of the sealing structure of a developing roller according to this utility model.

[0020] In the diagram: 1. Toner box; 10. Through hole; 2. Waste toner box; 20. Opening; 21. Guide groove; 22. Baffle; 23. Guide silicone; 24. Baffle; 3. Developing roller; 30. Slide groove; 4. Drive shaft; 40. Flow divider; 400. Hard part; 401. Soft part; 5. Cleaning assembly; 50. Roller body; 51. Roller shaft; 52. Sponge layer. Detailed Implementation

[0021] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0024] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] A preferred embodiment of the present invention provides a sealing structure for a developing roller 3, such as... Figures 1-4 As shown, the device includes a toner cartridge 1, a waste toner cartridge 2, and a developing roller 3. The front end of the waste toner cartridge 2 has an opening 20 to avoid the developing roller 3, and the developing roller 3 is located in the opening 20 in a left-right direction. The lower end of the toner cartridge 1 has a through hole 10 for toner to flow out, and the waste toner cartridge 2 is located at the lower end of the toner cartridge 1 and blocks the through hole 10. The upper side wall of the waste toner cartridge 2 opposite to the through hole 10 has a guide groove 21 to guide the toner in the toner cartridge 1 to the upper part of the developing roller 3. Both sides of the guide groove 21 have baffles 22 to prevent toner from flying out. The upper ends of the two baffles 22 are fixedly connected to the toner cartridge 1, and the lower ends are slidably connected to the circular side wall of the developing roller 3. The guide groove 21 also has a drive shaft 4 to drive the toner to flow to the developing roller 3. The drive shaft 4 is electrically connected to an external motor whose rotation speed can be controlled.

[0027] In this embodiment, the drive shaft 4 is provided with a flow divider 40 for diverting toner. One end of the flow divider 40 is disposed on the side wall of the drive shaft 4, and the other end extends away from the rotation direction of the drive shaft 4. The flow divider 40 includes a rigid part 400 disposed on the shaft body of the drive shaft 4, and a soft part 401 disposed along the length direction of the rigid part 400. The soft part 401 is made of silicone. Figure 1 When viewed from the perspective of the drive shaft 4, the drive shaft 4 rotates clockwise; there are multiple, preferably 10, flow dividers 40, and the angle between each flow divider 40 and the drive shaft 4 is preferably 30 degrees; when the flow divider 40 rotates to the side wall of the guide groove 21, the soft part 401 of the flow divider 40 contacts the side wall of the guide groove 21. The soft part 401 has the ability to deform elastically and can deform accordingly within a period of time to prevent the toner from falling from the flow divider 40 into the guide groove 21. The rotation speed of the drive shaft 4 can be controlled to control the speed at which the toner falls into the guide groove 21, and good sealing performance is achieved in this process.

[0028] During operation, the drive shaft 4 rotates, and the toner in the toner cartridge 1 falls into the gap between two adjacent flow dividers 40 facing the toner cartridge 1. The drive shaft 4 continues to rotate, and the soft part 401 of the flow divider 40, which abuts against the side wall of the guide channel 21, reaches its maximum deformation and slides from the side wall of the guide channel 21 into the guide channel 21. At this time, the toner in the gap between this flow divider 40 and its adjacent flow divider 40 falls into the guide channel 21. Multiple flow dividers 40 repeat this action until the toner in the guide channel 21 accumulates to a certain amount, contacts the upper part of the developing roller 3, and is absorbed by the developing roller 3. At this time, although there is toner accumulated in the guide channel 21, the toner is blocked by the baffle 22 on the side wall of the guide channel 21, and is absorbed by the developing roller 3 as soon as it flows out of the guide channel 21. There is no problem of toner leakage or falling out.

[0029] In this embodiment, a long strip of guiding silicone 23 is fixedly connected to the lower side wall of the front end of the guide groove 21; the guiding silicone 23 is arranged along the length direction of the developing roller 3; the end of the guiding silicone 23 away from the guide groove 21 is located on the upper part of the developing roller 3; the guiding silicone 23 further prevents toner from leaking from the gap between the developing roller 3 and the guide groove 21, and the length of the guiding silicone 23 is longer than the length of the cleaning roller, so even if the toner falls from the guiding silicone 23, it will fall into the waste toner box 2 and will not contaminate the sponge layer 52 on the cleaning roller.

[0030] In this embodiment, the roller body 50 of the developing roller 3 has a circular side wall with a sliding groove 30 for the lower end of the baffle 22 to slide therein. The sliding groove 30 is annular and coaxially arranged with the roller body 50.

[0031] In this embodiment, the waste powder box 2 is also equipped with a cleaning component 5 for cleaning the developing roller 3.

[0032] In this embodiment, the cleaning component 5 includes a cleaning roller for cleaning the developing roller 3; the cleaning roller includes a cylindrical roller body 50, a roller shaft 51 coaxially disposed on the roller body 50, and a sponge layer 52 sleeved on the outer peripheral side wall of the roller body; the roller shaft 51 is horizontally disposed in the waste toner box 2, and the two ends of the roller shaft 51 are respectively rotatably connected to the two opposite side walls of the waste toner box 2; when installed in place, the sponge layer 52 is tangent to the outer side wall of the developing roller 3; it is used to wipe the waste toner off the developing roller 3, and the wiped waste toner automatically falls into the waste toner box 2 and will not fall into the printer inside during operation.

[0033] In this embodiment, a baffle 24 is provided on the lower side wall of the opening 20 to prevent toner from flying out, further preventing waste toner leakage from the waste toner box 2.

[0034] In this embodiment, the roller shaft of the developing roller 3 is made of a non-conductive coating material, such as an aluminum oxide coating, and the roller body of the developing roller is made of a semi-conductive rubber material. This design can ensure that the friction charge of the developing roller body is at a high level, so that the amount of powder applied when the developing roller body contacts the photosensitive drum is large, thereby solving the problem of light color and gray background caused by the developing roller 3.

[0035] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A seal structure of a developing roller, characterized by, The device includes a toner cartridge, a waste toner cartridge, and a developing roller. The waste toner cartridge has an opening at its front end to avoid the developing roller, and the developing roller is positioned within the opening in a left-right direction. The lower end of the toner cartridge has a through-hole for toner to flow out, and the waste toner cartridge is located at the lower end of the toner cartridge and blocks the through-hole. The upper sidewall of the waste toner cartridge opposite the through-hole has a guide groove that directs the toner from the toner cartridge to the upper part of the developing roller. Both sides of the guide groove have baffles to prevent toner from flying out; the upper ends of the two baffles are fixedly connected to the toner cartridge, and the lower ends are slidably connected to a circular sidewall of the developing roller. A drive shaft is also provided within the guide groove to drive the toner to flow towards the developing roller.

2. The seal structure for a developer roller according to claim 1, wherein The drive shaft is provided with a flow divider plate for diverting toner. One end of the flow divider plate is located on the side wall of the drive shaft, and the other end extends away from the rotation direction of the drive shaft.

3. The seal structure for a developer roller according to claim 1, wherein A long strip of guiding silicone is fixedly connected to the lower side wall of the front end of the guide groove; the guiding silicone is arranged along the length direction of the developing roller; the end of the guiding silicone away from the guide groove is located on the upper part of the developing roller.

4. The seal structure for a developer roller according to claim 1, wherein The waste powder box is also equipped with a cleaning component for cleaning the developing roller.

5. The seal structure for a developer roller according to claim 4, wherein The cleaning assembly includes a cleaning roller for cleaning the developing roller; the cleaning roller includes a cylindrical roller body, a roller shaft coaxially disposed on the roller body, and a sponge layer sleeved on the outer peripheral side wall of the roller body; the roller shaft is horizontally disposed inside the waste toner box, and the two ends of the roller shaft are respectively rotatably connected to the two opposite side walls of the waste toner box; when installed in place, the sponge layer is tangent to the outer side wall of the developing roller.

6. The seal structure for a developer roller according to claim 1, wherein The lower sidewall of the opening is provided with a baffle to prevent carbon powder from flying out.

7. The seal structure for a developer roller according to claim 1, wherein The developing roller shaft is made of a non-conductive coating material, and the developing roller body is made of a semi-conductive rubber material.

Images