Sealing felt for developing roller and developing unit
By designing a sealing felt that is in contact with the developing roller and the powder output scraper, the problem of toner cartridge carbon powder leakage is solved, efficient sealing is achieved, printing quality and equipment stability are improved, and production costs are reduced.
Patent Information
- Application Number
- CN202422417325.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-08
AI Technical Summary
During the printing process, the existing toner cartridges have a gap between the felt, the developing roller and the powder output knife, which affects the printing quality and causes toner waste. The existing solutions are costly or difficult.
A sealing felt for developing rollers is designed, including a contact part and abutment part, and a high-temperature resistant Teflon felt layer is used to contact the developer roller and the powder output scraper. The seal is achieved through an integrated backsheet layer and an adhesive layer, and combined with the optimization of the development unit structure, it prevents toner leakage.
Effectively prevent toner leakage, improve printing quality, reduce production costs, simplify assembly difficulty, avoid toner pollution, and improve equipment operation stability.
Smart Images
Figure CN223272779U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printing equipment, in particular to a sealing felt for a developing roller and a developing unit. Background Art
[0002] Currently, toner cartridges on the market all use a felt seal to prevent toner leakage. However, due to the low precision of existing production and processing equipment, the dimensions of the felt produced are subject to variations. This can cause gaps between the felt surface and the developer roller and powder blade, and even between the felt end and the toner cartridge rubber. During the printing process, toner can leak through these gaps, affecting print quality, contaminating the printer, and wasting toner.
[0003] To this end, manufacturers generally either adopt the method of modifying production and processing equipment to improve processing accuracy, but this method is difficult to implement and costly; or they adopt the method of deliberately increasing the processing size, but the size processed in this way is often too large, making assembly more difficult or affecting the normal operation of the printer (for example: pressing the developing roller or causing the powder knife to tilt), or even making it impossible to install and directly scrapped. In view of this, researchers in this field have designed a sealing felt and developing unit for the developing roller. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a sealing felt for a developing roller and a developing unit.
[0005] The technical solution of the present invention is as follows: on the one hand, the present invention discloses a sealing felt for a developing roller, comprising a felt body, the felt body comprising a contact portion and an abutment portion integrally formed on both sides of the contact portion, the contact portion and the abutment portion both comprising a film layer and a felt layer arranged on the upper surface of the film layer.
[0006] It can be seen from the above solution that the felt layer is used to receive toner to prevent toner from leaking out and affecting the printing quality, the contact layer is used to contact the developing roller, and the abutting portion is used to contact the powder discharging scraper.
[0007] The material of the backsheet layer is woven fabric, and the material of the felt layer is Teflon felt. It can be seen that the Teflon felt is a high-temperature resistant material.
[0008] The height of the felt layer is 1.0-1.3 mm.
[0009] The lower surface of the negative film layer is provided with an adhesive layer, and a release film is attached to the bottom of the adhesive layer. Thus, the adhesive layer is used to attach the felt body to the developing unit.
[0010] On the other hand, the utility model discloses a developing unit, comprising a developing frame, a developing roller, a powder discharge scraper, and a felt body. The developing roller is rotatably connected to the developing frame, the powder discharge scraper is disposed in front of the developing roller, and the felt body is attached to both sides of the powder discharge scraper, with the felt layer disposed toward the developing roller. It can be seen that the powder discharge scraper is disposed in front of the developing roller, and as the developing roller rotates, the powder discharge scraper scrapes off excess carbon powder on the developing roller.
[0011] The developing roller includes a roller shaft and a roller body sleeved on the outer layer of the roller shaft. The two ends of the roller shaft pass through the roller body. The felt layer is arranged toward the end of the roller body. The contact portion contacts the outer arc surface of the two ends of the roller body.
[0012] The powder scraper includes a powder scraper holder and a powder scraper blade mounted on the powder scraper holder. The powder scraper is parallel to the developer roller, and the powder scraper blade is positioned relative to the roller body. The powder scraper holder is provided with mounting holes on both sides of the powder scraper blade, and the abutment portion laterally contacts the outer cross-section of the powder scraper blade. Thus, the powder scraper holder is mounted and fixed to the developer holder via the mounting holes. The felt body contacts the outer cross-section of the powder scraper blade via the abutment portion, thereby achieving a seal between the powder scraper and the developer roller, preventing toner leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural diagram of the utility model;
[0014] Figure 2 It is a structural diagram of the utility model;
[0015] Figure 3 It is a structural diagram of the utility model; DETAILED DESCRIPTION
[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.
[0017] like Figures 1 to 3As shown, on the one hand, the utility model discloses a sealing felt for a developing roller, comprising a felt body 1, wherein the felt body 1 comprises a contact portion 11 and abutting portions 12 integrally formed on both sides of the contact portion 11, wherein the contact portion 11 and the abutting portion 12 both comprise a base film layer 2 and a felt layer 3 arranged on the upper surface of the base film layer 2, wherein the material of the felt layer 3 comprises woven cloth and Teflon felt, and the height of the felt layer 3 is 1.0 to 1.3 mm, and an adhesive layer is provided on the lower surface of the base film layer 2, and a release film 21 is attached to the bottom of the adhesive layer. In this embodiment, the felt body 1 is torn off the release film 21 and then attached for use, and the felt layer 3 realizes the sealing of the developing roller in the developing unit, and the height of the felt layer 3 is 1.0 to 1.3 mm, which saves production costs compared with the 3 mm felt currently available on the market.
[0018] On the other hand, the utility model discloses a developing unit, which includes a developing frame 4, a developing roller 5, a powder scraper 6 and the felt body 1. The developing roller 5 is rotatably connected to the developing frame 4, the powder scraper 6 is arranged on the front side of the developing roller 5, the felt body 1 is attached to both sides of the powder scraper 6, the felt layer 3 is arranged toward the developing roller 5, and the developing roller 5 includes a roller shaft 51 and a roller body 52 sleeved on the outer layer of the roller shaft 51. Both ends of the roller shaft 51 pass through the roller body 52. The felt layer 3 is arranged toward the end of the roller body 52, and the contact portion 11 contacts the outer arc surface of the two ends of the roller body 52. The powder scraper 6 includes a powder blade holder 61 and a powder blade 62 arranged on the powder blade holder 61. The powder scraper 6 is parallel to the developing roller 5, and the powder blade 62 is arranged corresponding to the roller body 52. The powder blade holder 61 is provided with mounting holes 611 on both sides of the powder blade 62, and the side of the abutment portion 12 contacts the cross section of the outer end of the powder blade 62. In this embodiment, movable limiting grooves 41 are provided on both sides of the developing frame 4 to adapt to the roller shaft 51. A gap is formed between the developing roller 4 and the blade edge of the powder scraper 6 for controlling the thickness of the carbon powder layer on the developing roller 5.
[0019] Finally, it should be emphasized that the above description is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A sealing felt for a developing roller, comprising a felt body (1), characterized in that: The felt body (1) comprises a contact portion (11) and abutment portions (12) integrally formed on both sides of the contact portion (11); the contact portion (11) and the abutment portions (12) both comprise a base film layer (2) and a felt layer (3) arranged on the upper surface of the base film layer (2).
2. A sealing felt for a developing roller according to claim 1, characterized in that: The material of the felt layer (3) includes woven cloth and Teflon felt.
3. The sealing felt for a developing roller according to claim 1, wherein: The height of the felt layer (3) is 1.0-1.3 mm.
4. The sealing felt for a developing roller according to claim 1, wherein: An adhesive layer is provided on the lower surface of the bottom sheet layer (2), and a release film (21) is attached to the bottom of the adhesive layer.
5. A developing unit comprising the sealing felt for a developing roller according to any one of claims 1 to 4, characterized in that: The developing unit comprises a developing frame (4), a developing roller (5), a powder discharging scraper (6) and the felt body (1); the developing roller (5) is rotatably connected to the developing frame (4) via a movable limiting groove (41); the powder discharging scraper (6) is arranged on the front side of the developing roller (5); the felt body (1) is attached to both sides of the powder discharging scraper (6); and the felt layer (3) is arranged toward the developing roller (5).
6. The developing unit according to claim 5, wherein: The developing roller (5) comprises a roller shaft (51) and a roller body (52) sleeved on the outer layer of the roller shaft (51); both ends of the roller shaft (51) pass through the roller body (52); the felt layer (3) is arranged toward the end of the roller body (52); and the contact portion (11) contacts the outer arc surface of the two end portions of the roller body (52).
7. The developing unit according to claim 6, wherein: The powder discharging scraper (6) comprises a powder discharging scraper frame (61) and a powder discharging blade (62) arranged on the powder discharging scraper frame (61); the powder discharging scraper (6) is parallel to the developing roller (5); the powder discharging blade (62) is arranged corresponding to the roller body (52); the powder discharging scraper frame (61) is provided with mounting through holes (611) on both outer sides of the powder discharging blade (62); and the side of the abutting portion (12) contacts the outer end cross section of the powder discharging blade (62).