A negative pressure refill ink cartridge

Abstract

This utility model discloses a negative pressure refill ink cartridge, relating to the field of ink cartridge technology. The cartridge includes an ink cartridge with a manual negative pressure pump fixedly connected to its top via an opening. A one-way exhaust valve is fixedly connected to the output port of the manual negative pressure pump. A locking interface is provided on the top of the ink cartridge, and a sealing cover is locked in place. Positioning plates are fixedly connected to both side walls of the sealing cover. Positioning ports are fixedly connected to both ends of the top of the ink cartridge, and the positioning plates at both ends engage with the corresponding positioning ports. The ink cartridge provided by this utility model facilitates quick ink refilling and eliminates air bubbles, while also allowing for quick disassembly and cleaning. This solves the problems of existing negative pressure refill ink cartridges, such as cumbersome ink refilling operations, ink overflow, air bubble residue, and slow ink filling due to their sealed structure, as well as the difficulty in cleaning the interior due to the difficult disassembly of the outer shell.

Description

Technical Field

[0001] This utility model relates to the field of ink cartridge technology, specifically to a negative pressure filling ink cartridge. Background Technology

[0002] A negative pressure filling cartridge is a filling ink supply device that uses internal negative pressure and external suction to balance ink flow through pipes from the ink outlet to the printhead.

[0003] Existing negative pressure refill ink cartridges typically employ a sealed structure to maintain an internal negative pressure environment for stable ink supply. However, this structure makes ink refilling cumbersome. When users need to refill ink, they often have to operate through a tiny ink filling hole. During the ink filling process, issues such as ink overflow and air bubbles can easily occur, and the ink filling speed can be slow, seriously affecting efficiency and failing to meet users' needs for quick and convenient ink refilling. Furthermore, due to the sealing requirements of negative pressure refill ink cartridges, their outer shells usually adopt an integrated design or a complex assembly structure, making disassembly difficult. When the ink cartridge becomes clogged, has residual impurities, or requires deep cleaning, users cannot open the cartridge to perform effective cleaning operations. This not only affects the lifespan and print quality of the ink cartridge but may also lead to premature cartridge failure, increasing usage costs and wasting resources. Utility Model Content

[0004] In view of the problems existing in the current negative pressure filling ink cartridge, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a negative pressure filling ink cartridge, which solves the problems of existing negative pressure filling ink cartridges, such as cumbersome ink replenishment operation, easy ink overflow, air bubble residue and slow ink filling, and difficulty in cleaning the inside due to the sealing structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A negative pressure filling ink cartridge includes an ink cartridge, a manual negative pressure pump fixedly connected to the top of the ink cartridge through an opening, a one-way exhaust valve fixedly connected to the output port of the manual negative pressure pump, a snap-fit ​​interface on the top of the ink cartridge and a sealing cover plate snap-fitted therein, positioning plates fixedly connected to both side walls of the sealing cover plate, positioning ports fixedly connected to both ends of the top of the ink cartridge, the positioning plates at both ends snap-fitting with the corresponding positioning ports, and limiting mechanisms fixedly connected to the positioning plates are provided in the cavities at both ends of the top of the ink cartridge.

[0008] A conical ink fountain is fixedly connected to the side wall of the ink cartridge. A threaded connection port is provided on the side wall of the conical ink fountain. A first threaded end is fixedly connected to the inlet of the ink cartridge. A threaded cap is threadedly connected to the outer wall of the first threaded end. A connecting hose is fixedly connected to one end of the threaded cap. A suction head is fixedly connected to one end of the connecting hose. A protective sealing cap is threadedly connected to the wall of the suction head. A filter mechanism is provided at the inlet end of the ink cartridge cavity.

[0009] Preferably, the limiting mechanism includes a limiting port, a limiting rod, a second spring, an adjusting groove, and a lever. Limiting ports are provided on the side walls of the positioning plates at both ends. Limiting rods are slidably connected to the top cavities of the ink cartridge. The rod walls of the limiting rods at both ends are sleeved with second springs. The other ends of the limiting rods at both ends are inserted into the corresponding limiting ports. Adjusting grooves are provided at both ends of the top of the ink cartridge, and levers are slidably connected to them. The side walls of the levers at both ends are fixedly connected to the rod walls of the corresponding limiting rods.

[0010] Preferably, the filtering mechanism includes a second threaded end, a threaded cover, a filter screen, and a defoaming screen. The second threaded end is fixedly connected to the inlet of the ink cartridge. The outer side wall of the second threaded end is threadedly connected to the threaded cover. The side wall of the threaded cover is fixedly connected to the filter screen through an opening. A defoaming screen is snapped between the second threaded end and the threaded cover.

[0011] Preferably, an insertion port is provided on the inner side wall of one end of the ink cartridge, and one end of the protective sealing cap is inserted into the insertion port.

[0012] Furthermore, a transparent observation plate is fixedly connected to the side wall of the ink cartridge through an opening.

[0013] Preferably, the interior of the ink cartridge is provided with a ceramic anti-stick coating.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] 1. This utility model utilizes a manual negative pressure pump in conjunction with a one-way exhaust valve to flexibly adjust the internal negative pressure of the ink cartridge, precisely control the ink replenishment amount, prevent ink overflow, and prevent air backflow, effectively solving the problem of slow ink filling, achieving efficient and stable ink filling, and ensuring smooth ink supply for printing.

[0016] 2. This utility model utilizes a limiting mechanism to enable quick disassembly and assembly of the sealing cover, simplifying the ink refill process. The filter mechanism employs a threaded connection design, facilitating the disassembly and cleaning of the filter screen and anti-foaming screen, preventing impurities and foam from affecting the printing effect. The ceramic anti-stick coating prevents ink residue buildup, reducing the difficulty of internal cleaning and improving the overall ease of ink cartridge maintenance.

[0017] 3. This utility model utilizes a transparent observation plate to facilitate real-time monitoring of the remaining ink level and provides timely reminders to replenish the ink. The design of the protective sealing cap and insertion port prevents dust from contaminating the ink and avoids the loss of the sealing cap. The design of the snap-fit ​​and threaded connection structure makes operation simple, significantly improving the convenience and reliability of ink cartridge use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a side sectional view of the present invention;

[0021] Figure 3 This is a front sectional view of the present invention;

[0022] Figure 4 This is a three-dimensional sectional view of the filter mechanism of this utility model;

[0023] Figure 5 This is a partial perspective view of the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Ink cartridge; 2. Manual negative pressure pump; 3. One-way exhaust valve; 4. Clip interface; 5. Sealing cover; 6. Positioning plate; 7. Positioning port; 8. Conical ink fountain; 9. Threaded connection port; 10. First threaded end; 11. Threaded cap; 12. Connecting hose; 13. Suction tube head; 14. Protective sealing cap; 15. Limiting port; 16. Limiting lever; 17. Second spring; 18. Adjusting slide; 19. Paddle; 20. Second threaded end; 21. Threaded cover; 22. Filter screen; 23. Anti-fog screen; 24. Insertion port; 25. Transparent observation plate. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model discloses a negative pressure filling ink cartridge.

[0028] This utility model provides, for example Figure 1-5The negative pressure filling ink cartridge shown includes an ink cartridge 1. A manual negative pressure pump 2 is fixedly connected to the top of the ink cartridge 1 through an opening. A one-way exhaust valve 3 is fixedly connected to the output port of the manual negative pressure pump 2. A snap-fit ​​interface 4 is opened on the top of the ink cartridge 1, and a sealing cover plate 5 is snapped into it. Positioning plates 6 are fixedly connected to both side walls of the sealing cover plate 5. Positioning ports 7 are fixedly connected to both ends of the top of the ink cartridge 1. The positioning plates 6 at both ends snap into the corresponding positioning ports 7. A limiting mechanism is provided in the cavity at both ends of the top of the ink cartridge 1 and is fixedly connected to the positioning plates 6.

[0029] A conical ink fountain 8 is fixedly connected to the side wall of ink cartridge 1. A threaded connection port 9 is provided on the side wall of the conical ink fountain 8. A first threaded end 10 is fixedly connected to the inlet of ink cartridge 1. A threaded cap 11 is threadedly connected to the outer wall of the first threaded end 10. A connecting hose 12 is fixedly connected to one end of the threaded cap 11. A suction head 13 is fixedly connected to one end of the connecting hose 12. A protective sealing cap 14 is threadedly connected to the wall of the suction head 13. A filter mechanism is provided at the inlet end of the ink cartridge 1. Using a manual negative pressure pump 2 and a one-way exhaust valve 3, the internal negative pressure of ink cartridge 1 can be manually adjusted. During ink replenishment, ink overflow due to improper pressure can be effectively prevented. The one-way exhaust valve 3 prevents air backflow, ensuring stable negative pressure inside ink cartridge 1, achieving precise ink filling, and solving the problem of slow ink filling. The design of a snap-fit ​​and limit mechanism ensures that the sealing cover 5 and the ink cartridge are properly aligned. The tight connection of cartridge 1 improves the sealing performance of cartridge 1 and prevents ink leakage. Compared with traditional complex sealing structures, it is easier to disassemble and install, simplifying ink refilling operations. The filter mechanism located at the input end inside the cavity of cartridge 1 and the threaded connection structure make it easier to connect and disassemble the components, facilitating ink refilling and equipment maintenance. The suction head 13, in conjunction with the manual negative pressure pump 2, enables efficient ink suction. The protective sealing cap 14 effectively prevents dust and impurities from entering cartridge 1, ensuring ink cleanliness. The filter mechanism filters ink impurities and foam, preventing impurities and air bubbles from affecting printing quality. This solves the problems of existing negative pressure refill cartridges, such as cumbersome ink refilling operations, easy ink overflow, air bubble residue, slow ink filling, and difficulty in cleaning the inside due to the difficult disassembly of the outer shell.

[0030] To enable quick disassembly and installation of the sealing cover 5, such as Figure 1 and 3The limiting mechanism includes a limiting port 15, a limiting rod 16, a second spring 17, an adjusting groove 18, and a lever 19. Limiting ports 15 are provided on the side walls of both end positioning plates 6. Limiting rods 16 are slidably connected to the top end cavities of the ink cartridge 1. The second spring 17 is sleeved on the rod walls of both end limiting rods 16. The other ends of both end limiting rods 16 are inserted into the corresponding limiting ports 15. Adjusting grooves 18 are provided on both ends of the top of the ink cartridge 1, and levers 19 are slidably connected thereto. The side walls of the levers 19 are fixedly connected to the corresponding rod walls of the limiting rods 16. By using the levers 19 to move the limiting rods 16, the sealing cover 5 can be quickly disassembled and installed. This simplifies operation and reduces the difficulty of cleaning the interior due to the difficulty in disassembling the outer shell. Furthermore, the second spring 17 provides elastic support, ensuring stable insertion of the limiting rods 16 and the limiting ports 15, further improving the sealing effect.

[0031] To facilitate the filtering of impurities and foam, and to make disassembly, replacement, and cleaning easier, such as Figure 2 and 4 As shown, the filtration mechanism includes a second threaded end 20, a threaded cap 21, a filter screen 22, and an anti-foaming screen 23. The second threaded end 20 is fixedly connected to the inlet of the ink cartridge 1. The threaded cap 21 is threadedly connected to the outer wall of the second threaded end 20. The filter screen 22 is fixedly connected to the side wall of the threaded cap 21 through an opening. The anti-foaming screen 23 is snapped between the second threaded end 20 and the threaded cap 21. The filter screen 22 can effectively intercept solid impurities in the ink, and the anti-foaming screen 23 can eliminate foam generated by ink flow, preventing foam from entering the printing equipment and causing blockage or printing defects. At the same time, the threaded connection method facilitates disassembly and cleaning, ensuring long-term stable filtration effect.

[0032] To facilitate the secure placement of the protective sealing cap 14 when not in use, such as Figure 2 As shown, an insertion port 24 is provided on the inner side wall of one end of the ink cartridge 1. One end of the protective sealing cap 14 is inserted into the insertion port 24. With the help of the insertion port 24, this design allows the protective sealing cap 14 to be fixedly placed when not in use, thus preventing it from being lost.

[0033] To facilitate visual observation of the remaining ink level in ink cartridge 1, such as Figure 2 As shown, a transparent observation plate 25 is fixedly connected to the side wall of ink cartridge 1 through an opening. The remaining ink level in ink cartridge 1 can be directly observed using the transparent observation plate 25, which facilitates timely ink replenishment and avoids affecting printing work due to insufficient ink.

[0034] To avoid ink residue buildup, such as Figure 1-3 As shown, the interior of ink cartridge 1 is equipped with a ceramic anti-stick coating. This ceramic anti-stick coating can prevent ink from adhering to the inner wall of ink cartridge 1, avoid ink residue accumulation, facilitate cleaning of the inside of ink cartridge 1, and reduce ink flow resistance to ensure smooth ink output.

[0035] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A negative pressure refillable ink cartridge, comprising an ink cartridge (1), characterized in that, The top of the ink cartridge (1) is fixedly connected to a manual negative pressure pump (2) through an opening. The output port of the manual negative pressure pump (2) is fixedly connected to a one-way exhaust valve (3). The top of the ink cartridge (1) is provided with a snap-fit ​​interface (4) and a sealing cover plate (5) is snap-fitted therein. Positioning plates (6) are fixedly connected to both side walls of the sealing cover plate (5). Positioning ports (7) are fixedly connected to both ends of the top of the ink cartridge (1). The positioning plates (6) at both ends snap-fitted to the corresponding positioning ports (7). Limiting mechanisms that are fixedly connected to the positioning plates (6) are provided in the cavities at both ends of the top of the ink cartridge (1). The side wall of the ink cartridge (1) is fixedly connected to a conical ink outlet (8), and the side wall of the conical ink outlet (8) is provided with a threaded connection port (9). The inlet of the ink cartridge (1) is fixedly connected to a first threaded end (10), and the outer wall of the first threaded end (10) is threadedly connected to a threaded cap (11). One end of the threaded cap (11) is fixedly connected to a connecting hose (12), and one end of the connecting hose (12) is fixedly connected to a suction head (13). The wall of the suction head (13) is threadedly connected to a protective sealing cap (14). The inlet of the ink cartridge (1) is provided with a filter mechanism.

2. The negative pressure filling ink cartridge according to claim 1, characterized in that, The limiting mechanism includes a limiting port (15), a limiting lever (16), a second spring (17), an adjusting groove (18), and a lever (19). The side walls of the positioning plates (6) at both ends are provided with limiting ports (15). The top two cavities of the ink cartridge (1) are slidably connected to the limiting lever (16). The rod walls of the limiting levers (16) at both ends are sleeved with the second spring (17). The other ends of the limiting levers (16) at both ends are inserted into the corresponding limiting ports (15). The top two ends of the ink cartridge (1) are provided with adjusting grooves (18) and are slidably connected with levers (19). The side walls of the levers (19) at both ends are fixedly connected to the rod walls of the corresponding limiting levers (16).

3. A negative pressure filling ink cartridge according to claim 1, characterized in that, The filtering mechanism includes a second threaded end (20), a threaded cap (21), a filter screen (22), and a defoaming screen (23). The second threaded end (20) is fixedly connected to the inlet of the ink cartridge (1). The threaded cap (21) is threadedly connected to the outer wall of the second threaded end (20). The filter screen (22) is fixedly connected to the side wall of the threaded cap (21) through an opening. The defoaming screen (23) is snapped between the second threaded end (20) and the threaded cap (21).

4. A negative pressure filling ink cartridge according to claim 1, characterized in that, The ink cartridge (1) has an insertion port (24) on its inner side wall at one end, and one end of the protective sealing cap (14) is inserted into the insertion port (24).

5. A negative pressure filling ink cartridge according to claim 1, characterized in that, A transparent observation plate (25) is fixedly connected to the side wall of the ink cartridge (1) through an opening.

6. A negative pressure filling ink cartridge according to claim 1, characterized in that, The ink cartridge (1) has a ceramic anti-stick coating inside its cavity.

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