Anti-reflux ink cartridge
By designing the booster chamber, pressure reduction chamber and capillary structure of the anti-reflow ink cartridge, the problems of high sponge design cost and difficulty in installation detection are solved, and the stable delivery of ink and printing quality are achieved.
Patent Information
- Application Number
- CN202010430166.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-05-20
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2040-05-20
AI Technical Summary
In the existing inkjet printing technology, sponges are designed to prevent ink from reflowing, but are costly and difficult to detect installation quality, resulting in poor printing.
An anti-reflow ink cartridge is designed, including a housing, an ink outlet, and an air inlet. It is equipped with an ink storage chamber, a pressure reduction chamber, a pressure boost chamber and an anti-capillary structure. The ink outlet is connected to the pressure boost chamber and a pressure drop The cavity and ink storage cavity, the anti-capillary structure is close to the ink outlet side, is used to prevent ink from flowing back, and ensure the pressure balance inside the ink cartridge through the communication between the booster chamber and the pressure reduction chamber.
Effectively prevent ink from reflow and ink leakage, ensure printing quality, reduce the number of ink cartridge parts, reduce costs, and avoid ink dissipation and color mixing, improving printing stability.
Smart Images
Figure CN111469561B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of printer components, and in particular to an anti-backflow ink cartridge. Background Art
[0002] Inkjet printing is a relatively mature and widely used printing technology. Whether it is bubble or piezoelectric printing technology, the inkjet printing system generally needs to use some method to stably and controllably deliver the printed liquid medium to the print head. The commonly used method is to create a certain negative pressure in the ink cartridge. When printing, the ink in the ink cartridge is delivered to the print head under the action of the suction force of the print head; various methods can be used to create negative pressure in the ink cartridge, such as using a mechanical valve method to create negative pressure in the ink cartridge or using a porous material to absorb ink to create negative pressure in the ink cartridge; the mechanical valve required to maintain stable pressure requires very high precision, so most of the existing technologies use a porous material to absorb ink. This method has high requirements for the installation of the sponge. If the sponge is not installed properly, poor printing is likely to occur. It is also difficult to detect the installation quality of the sponge after the sponge is installed, so it is difficult to control the quality of the ink cartridge. Summary of the invention
[0003] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides an anti-backflow ink cartridge for solving the problem that sponge is used to prevent backflow in the prior art, but the design using sponge has high cost and it is difficult to detect the quality of sponge installation.
[0004] The technical solution adopted by the present invention to solve its technical problems is: an anti-backflow ink cartridge, comprising a shell, an ink outlet and an air inlet, an ink storage chamber is arranged in the shell, the ink outlet is arranged at the bottom of the shell, the air inlet is arranged at the top of the shell, and a pressure reduction chamber, a pressure boosting chamber and an anti-capillary structure are also arranged in the shell, and the ink outlet is connected to the ink storage chamber via the pressure boosting chamber, the pressure reduction chamber and the anti-capillary structure in sequence.
[0005] As a further improvement of the above solution, the pressurization chamber and the ink outlet are connected via a pressure reduction groove.
[0006] As a further improvement of the above solution, the anti-capillary structure is arranged on a side of the ink storage cavity close to the ink outlet.
[0007] As a further improvement of the above solution, the anti-capillary structure includes an ink absorption cavity, and the ink absorption cavity is connected with the ink storage cavity through an ink absorption port.
[0008] As a further improvement of the above solution, connecting ports are respectively provided on both sides of the bottom of the ink absorption chamber, one of the connecting ports is connected to the ink absorption port, and the other connecting port is connected to the pressure reduction chamber.
[0009] As a further improvement of the above solution, the pressurization chamber is connected to the ink outlet through a connecting groove.
[0010] As a further improvement of the above solution, the volume of the portion of the pressurization chamber close to the ink outlet is smaller than the volume of the portion far from the ink outlet.
[0011] As a further improvement of the above scheme, it also includes an air inlet hole, which is arranged at the bottom of the ink storage cavity, and the air inlet hole is connected to the air inlet port through an air inlet groove.
[0012] As a further improvement of the above solution, a filter chip is further arranged between the air inlet hole and the air inlet groove.
[0013] As a further improvement of the above solution, an ink outlet cavity is provided between the ink outlet and the pressurization cavity.
[0014] The beneficial effects of the present invention are as follows: the ink outlet of the present invention is connected to the pressurization chamber, the pressure reduction chamber and the anti-capillary structure in sequence. The ink outlet may be set upward due to misoperation during transportation or storage. The anti-capillary structure can prevent ink from flowing back, avoiding ink leakage or even damage to the ink cartridge during transportation or storage; and the pressurization effect of the pressurization chamber is used to ensure rapid ink supply to the ink outlet, while the pressure reduction effect of the pressure reduction chamber is used to achieve low pressure control, avoiding ink loss and color mixing. In addition, the pressure balance inside the ink cartridge can be ensured by the connected design of the pressurization chamber and the pressure reduction chamber. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0016] Figure 1 is an internal structure diagram of an anti-backflow ink cartridge according to an embodiment of the present invention;
[0017] Figure 2 is a schematic structural diagram of an anti-backflow ink cartridge according to an embodiment of the present invention;
[0018] Figure 3 is a schematic structural diagram of an anti-backflow ink cartridge according to an embodiment of the present invention, in which the ink outlet faces upward;
[0019] Figure 4 It is a schematic structural diagram of an anti-backflow ink cartridge with an ink outlet placed sideways in an embodiment of the present invention.
[0020] Wherein: housing 100; ink storage chamber 101; pressure reducing chamber 102; pressure increasing chamber 103; pressure reducing groove 104; ink suction chamber 105; ink suction port 106; ink outlet 200; air inlet 300; air inlet hole 301; air inlet groove 302; filter chip 303; ink outlet chamber 400. DETAILED DESCRIPTION
[0021] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0022] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0024] Reference Figures 1 to 4The anti-backflow ink cartridge shown in the figure comprises a shell 100, and an ink outlet 200 and an air inlet 300 respectively arranged on the shell 100, wherein an ink storage chamber 101, a pressure reduction chamber 102, a pressure increase chamber 103 and an anti-capillary structure are arranged in the shell 100, the ink outlet 200 is arranged at the bottom of the shell 100, and the air inlet 300 is arranged at the top of the shell 100, and the ink outlet 200 is connected with the pressure increase chamber 103, the pressure reduction chamber 102, the anti-capillary structure and the ink storage chamber 101 in sequence. When in use, ink is stored in the ink storage chamber 101 and flows out through the anti-capillary structure, the pressure reduction chamber 102, the pressure increase chamber 103 and the ink outlet 200 in sequence to realize ink supply; however, when the ink cartridge is transported or stored, due to misoperation, the ink may be blocked by the ink. The anti-capillary structure can reduce ink blockage and avoid ink leakage or even damage to the ink cartridge. Specifically, when the ink outlet 200 is placed upward, since the pressurization chamber 103 and the pressure reduction chamber 102 are connected to the ink storage chamber 101, the ink in the pressurization chamber 103 and the pressure reduction chamber 102 is pumped into the ink storage chamber 101, resulting in a cavity in the pressurization chamber 103 and the pressure reduction chamber 102, thereby preventing ink from flowing out of the ink outlet 200. When in use, the ink outlet 200 is placed downward first, so that the ink flows into the pressurization chamber 103 and the pressure reduction chamber 102, ensuring that the ink can reach the ink outlet 200 in time when in use, avoiding the problem of color shortage in printing. When the ink outlet 200 is stored facing sideways, the anti-capillary structure can reduce ink blockage and avoid ink leakage or even damage to the ink cartridge. Specifically, when the ink outlet 200 is placed upward, since the pressurization chamber 103 and the pressure reduction chamber 102 are both connected to the ink storage chamber 101, the ink in the pressurization chamber 103 and the pressure reduction chamber 102 are pumped into the ink storage chamber 101, resulting in a cavity in the pressurization chamber 103 and the pressure reduction chamber 102, thereby preventing the ink from flowing out of the ink outlet 200. The capillary structure is immersed in the ink in the ink storage chamber 101, and it is difficult to form a loop, thereby ensuring that the ink outlet 200 does not leak ink; during the ink supply process, the pressure reduction chamber 102 can reduce the pressure of the ink on the print head to protect the print head and avoid the phenomenon of ink loss and color mixing of the print head. Specifically, the volume of the pressure reduction chamber 102 is smaller than the volume of the ink storage chamber 101. The ink in the ink storage chamber 101 first flows into the pressure reduction chamber 102 through the anti-capillary structure, and then the pressure reduction chamber 102 supplies ink to the ink outlet 200 to achieve pressure reduction. That is to say, due to the large volume of the ink outlet chamber 400, the pressure provided to the ink outlet 200 is too high, which is easy to cause ink loss. The pressure reduction chamber 102 is set between the ink storage chamber 101 and the ink outlet 200 of the present invention. 2 can effectively reduce the pressure of the ink outlet 200, thereby avoiding the ink drop phenomenon caused by the instantaneous increase of the ink outlet pressure; and the pressure-reducing chamber 102 is connected to the pressure-increasing chamber 103, and the pressure-increasing chamber 103 provides the print head with sufficient pressure to achieve rapid ink supply and ensure the smoothness of printing, and the pressure-reducing chamber 102 and the pressure-increasing chamber 103 are connected to form a mutually related and mutually restricted relationship, thereby ensuring the pressure balance of the entire ink cartridge; the present invention adopts an anti-capillary structure to prevent ink reflux, cancels the conventional structural design using sponges, reduces the number of parts of the ink cartridge, and reduces the manufacturing cost; and the structure in which the pressure-reducing chamber 102 and the pressure-increasing chamber 103 are connected can effectively avoid ink leakage and solve the ink supply problem, thereby improving the performance of stable printing.
[0025] In some embodiments, reference Figure 1 and Figure 2 As shown, the boost chamber 103 and the pressure reduction chamber 102 are connected via a pressure reduction groove 104. The pressure reduction groove 104 may be tubular and connect the bottom of the pressure reduction chamber 102 and the top of the boost chamber 103. The purpose is to prevent the boost chamber 103 from providing excessive ink supply pressure. The ink is transported through the pressure reduction groove 104 to achieve a stable and rapid ink supply effect.
[0026] In some embodiments, reference Figure 1 and Figure 2 As shown, the anti-capillary structure is arranged on one side of the film storage cavity near the ink outlet 200, and the anti-capillary structure includes an ink absorption cavity 105, which is connected with the film storage cavity through an ink absorption port 106. Specifically, connecting ports are respectively arranged on both sides of the bottom of the ink absorption cavity 105, one of which is connected with the ink absorption port 106, and the other ink absorption port 106 is connected with the pressure reduction cavity 102. The function of the ink absorption cavity 105 is that when the ink outlet 200 is placed upward, the ink absorption cavity 105 can block the anti-capillary pressure reduction cavity 102 and the ink storage cavity 101 from being connected through the anti-capillary structure, thereby ensuring that ink is difficult to flow from the ink storage cavity 101 into the pressure reduction cavity 102 and the pressurization cavity 103, thereby avoiding the problem of ink leakage.
[0027] In some embodiments, the boost chamber 103 is connected to the ink outlet 200 through a connecting groove, and an ink outlet chamber 400 is also provided between the ink outlet 200 and the boost chamber 103, that is, the boost chamber 103 and the ink outlet chamber 400 are connected through a connecting groove, and the connecting groove may be a sealed tubular shape, and the ink may flow from the boost chamber 103 to the ink outlet 200 along the connecting groove. Specifically, the connecting groove may extend upward from the bottom of the boost chamber 103 to the top of the shell 100, and then extend downward after bending to be connected with the ink outlet 200, so as to increase the length of the connecting groove. The purpose is to ensure that the ink at the bottom of the boost chamber 103 is absorbed to avoid residual ink in the boost chamber 103.
[0028] In some embodiments, reference Figure 2 As shown, the volume of the boost chamber 103 near the ink outlet 200 is smaller than the volume of the portion away from the ink outlet 200. In other embodiments, the boost chamber 103 may be in the shape of an inverted cone or an inverted prism with a larger top and a smaller bottom.
[0029] In some embodiments, reference Figures 1 to 4As shown, the shell 100 also includes an air inlet hole 301. Specifically, the air inlet hole 301 is arranged at the bottom of the ink storage chamber 101. The air inlet hole 301 is connected with the air inlet port 300 through an air inlet groove 302. The air inlet groove 302 can be in a sealed tubular shape, and the air inlet groove 302 is at least bent from the top to the bottom of the shell 100. The purpose is to increase the length of the air inlet groove 302 to avoid ink leakage accidents; further, a filter chip 303 is also arranged between the air inlet hole 301 and the air inlet groove 302. The filter chip 303 can be arranged in the air inlet hole 301. The purpose is to make the ink adhere to the surface of the filter chip 303 to form surface tension, so that it is difficult for the ink to leak out from the air inlet hole 301 and the air inlet groove 302, while the outside air can enter through the air inlet port 300 along the air inlet groove 302, so that a certain negative pressure is maintained in the ink storage chamber 101.
[0030] It should be noted that the connection channel between the anti-capillary structure and the decompression chamber 102 may be a thin tube channel, and further, a capillary channel with a smaller diameter may be used.
[0031] The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments. As long as the technical effects of the present invention are achieved by any same or similar means, they should fall within the protection scope of the present invention.
Claims
1. A backflow prevention ink cartridge, characterized in that: The invention comprises a shell, an ink outlet and an air inlet, wherein an ink storage chamber is arranged in the shell, the ink outlet is arranged at the bottom of the shell, the air inlet is arranged at the top of the shell, a pressure reduction chamber, a pressure boost chamber and an anti-capillary structure are also arranged in the shell, the ink outlet is connected with the ink storage chamber via the pressure boost chamber, the pressure reduction chamber and the anti-capillary structure in sequence, the pressure boost chamber and the pressure reduction chamber are connected via a pressure reduction groove, the volume of the part of the pressure boost chamber close to the ink outlet is smaller than the volume of the part far from the ink outlet, and the invention also comprises an air inlet, the air inlet is arranged at the bottom of the ink storage chamber, and the air inlet is connected with the air inlet via an air inlet groove, the air inlet groove is in a sealed tubular shape, and the air inlet groove is at least bent from the top to the bottom of the shell, an ink outlet chamber is also arranged between the ink outlet and the pressure boost chamber, and the pressure boost chamber and the ink outlet chamber are connected via a connecting groove.
2. The anti-backflow ink cartridge according to claim 1, characterized in that: The anti-capillary structure is arranged in the ink storage cavity at one side close to the ink outlet.
3. The anti-backflow ink cartridge according to claim 1 or 2, characterized in that: The anti-capillary structure comprises an ink absorption cavity, and the ink absorption cavity is communicated with the ink storage cavity through an ink absorption port.
4. The anti-backflow ink cartridge according to claim 3, characterized in that: Connecting ports are respectively arranged on both sides of the bottom of the ink absorption cavity, one of the connecting ports is communicated with the ink absorption port, and the other connecting port is communicated with the pressure reduction cavity.
5. The anti-backflow ink cartridge according to claim 1, characterized in that: The pressurizing chamber is communicated with the ink outlet through a connecting groove.
6. The anti-backflow ink cartridge according to claim 1, characterized in that: A filter chip is also arranged between the air inlet hole and the air inlet groove.