Ink bag and printing equipment

Abstract

The utility model relates to the technical field of printing equipment, and discloses an ink bag and printing equipment, which comprise a body part, an ink conveying channel, an ink storage cavity, an ink outlet cavity, a cleaning channel and a piston assembly. When the printing nozzle needs to be cleaned, ink can be injected to the ink bag through the ink conveying pipeline, and the ink sequentially passes through the ink conveying channel, the cleaning channel, the cleaning opening in the cleaning channel and the ink outlet cavity and impacts the piston assembly in the ink outlet cavity, so that the piston assembly moves in the ink outlet cavity to block the ink inlet; and then the ink used for cleaning the printing nozzle can flow out through the ink outlet in the ink outlet cavity, so that the effect of cleaning the printing nozzle through the cleaning channel of the ink bag is achieved. Through the arrangement, maintenance and cleaning work of the printing spray head are facilitated, so that the printing effect is improved, and the problem of ink interruption or blockage of the printing spray head in the printing process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to an ink bag and a printing equipment. Background Art

[0002] Inkjet printing is a type of computer printing that recreates digital images by spraying ink droplets onto paper or plastic substrates. Inkjet printers are the most commonly used type of printer, ranging from expensive professional machines to small, inexpensive consumer models. With the development of technology, the demand for printers is increasing, and the application areas of printers are becoming wider and wider, and the types of printers are also increasing accordingly.

[0003] The ink sac is the core component of inkjet printing. The ink sac of most existing inkjet printers usually does not have the function of cleaning the nozzle. Of course, there are also a few inkjet printers that use external devices to draw ink to clean the nozzle, but the cleaning effect is poor. When the inkjet nozzle does not print for a long time, impurities or air are easily introduced into the nozzle of the nozzle. Impurities remaining in the nozzle of the nozzle can easily cause blockage, thereby affecting the inkjet printing effect. In addition, air enters the nozzle or ink sac through the nozzle of the nozzle, resulting in ink interruption or discontinuous inkjet printing during the inkjet printing process, thereby affecting the inkjet printing effect. Utility Model Content

[0004] The embodiments of the present utility model aim to provide an ink bag and a printing device to solve the technical problem in the prior art that the ink bag does not have the function of cleaning the inkjet nozzle, thereby resulting in poor inkjet printing effect.

[0005] The present invention solves the technical problem by adopting the following technical solutions:

[0006] An ink sac is provided for use in a printing device, wherein the printing device includes an ink supply pipeline and a print head, wherein the print head can generate a suction force on the ink sac during a printing operation, and the ink sac includes:

[0007] A main body, one end of which is connected to the ink supply pipe and the other end is connected to the print head;

[0008] an ink delivery channel, the ink delivery channel being provided in the main body and connected to the ink delivery pipeline;

[0009] an ink storage chamber, the ink storage chamber being disposed in the main body and communicating with the ink supply channel, a one-way valve being disposed between the ink storage chamber and the ink supply channel, the one-way valve being capable of preventing ink in the ink supply channel from flowing into the ink storage chamber when inkjet printing is not in progress;

[0010] An ink outlet cavity, the ink outlet cavity is provided in the main body, the ink outlet cavity includes an ink inlet, a cleaning port and an ink outlet, the ink inlet is connected to the ink storage cavity, and the ink outlet is connected to the print head;

[0011] a cleaning channel, one end of the cleaning channel being connected to the ink supply channel, and the other end of the cleaning channel being connected to the cleaning port;

[0012] A piston assembly is movably arranged in the ink outlet cavity to block the ink inlet or the cleaning port.

[0013] In some embodiments, the piston assembly includes an elastic member and a piston head;

[0014] The piston head is disposed in the ink outlet cavity and is in contact with the inner wall of the ink outlet cavity;

[0015] One end of the elastic member is connected to the piston head, and the other end is connected to the inner wall of the ink outlet cavity;

[0016] In an initial state, the piston head is located between the cleaning port and the ink outlet to block the cleaning port;

[0017] In the cleaning state, the ink entering the ink outlet cavity through the cleaning port can push the piston head to move between the ink inlet and the ink outlet to block the ink inlet, and after the cleaning work is completed, the elastic member drives the piston head to reset.

[0018] In some embodiments, the diameter of the piston head is substantially the same as the inner diameter of the ink outlet cavity.

[0019] In some embodiments, the ink storage chamber includes a filter chamber and an ink storage chamber, and the filter chamber is provided with a filter screen for filtering impurities in the ink;

[0020] One end of the filter chamber is connected to the ink supply channel, and the other end is connected to the ink storage chamber.

[0021] In some embodiments, a filter channel is provided on the filter chamber, one end of the filter channel is connected to the filter chamber, and the other end is connected to the ink storage chamber and the cleaning channel respectively.

[0022] In some embodiments, the ink storage chamber includes a first cavity and a second cavity, and the one-way valve is disposed between the first cavity and the second cavity. The one-way valve is configured to allow ink in the first cavity to flow into the second cavity during inkjet printing, and to restrict ink in the first cavity from flowing into the second cavity during non-printing or cleaning.

[0023] The first cavity is connected to the filtering channel;

[0024] The second cavity is connected to the ink inlet.

[0025] In some embodiments, the first cavity and the second cavity are located on opposite sides of the body portion.

[0026] In some embodiments, a first through hole and a second through hole are respectively provided at both ends of the filter channel, the filter channel is connected to the filter chamber through the first through hole, and the filter channel is respectively connected to the ink storage chamber and the cleaning channel through the second through hole.

[0027] In some embodiments, the body portion includes a first joint and a second joint;

[0028] One end of the first connector is connected to the ink supply pipe, and the other end is connected to the ink supply channel;

[0029] One end of the second joint is connected to the print head, and the other end is connected to the ink outlet cavity.

[0030] In addition, this embodiment provides a printing device, including:

[0031] An ink cartridge, the ink cartridge being used to store ink and comprising an ink delivery pipeline;

[0032] The ink sac as described in any of the above technical solutions, wherein one end of the ink sac is connected to the ink delivery pipe, so that ink is introduced into the ink sac through the ink delivery pipe for storage;

[0033] A printer includes a print head and a negative pressure component. The negative pressure component is arranged in the print head and connected to the ink sac, and is used to form negative pressure on the ink sac so that the ink in the ink sac enters the print head.

[0034] Compared to the prior art, the ink sac and printing device provided in the embodiments of the present invention are provided with a cleaning channel, one end of which is connected to the ink supply channel and the other end is connected to the cleaning port of the ink outlet chamber. A piston assembly is movably disposed in the ink outlet chamber. When the print head needs to be cleaned, ink can be poured into the ink sac through the ink supply channel. The ink can then pass through the ink supply channel, the cleaning channel, the cleaning port on the cleaning channel, and the ink outlet chamber in sequence. The piston assembly is impacted in the ink outlet chamber, causing the piston assembly to move in the ink outlet chamber to block the ink inlet. The ink used to clean the ink sac can then flow out through the ink outlet port on the ink outlet chamber, thereby achieving the effect of cleaning the print head through the cleaning channel of the ink sac. This arrangement facilitates maintenance and cleaning of the print head, avoids ink interruption or blockage of the print head during printing, improves print quality, reduces clogging of the ink sac or print head due to impurity accumulation, and extends the service life of the ink sac or print head. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] One or more embodiments are exemplarily illustrated by the figures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0036] Figure 1 This is a schematic structural diagram of the ink bag provided by the utility model;

[0037] Figure 2 This is a schematic structural diagram of the ink bag provided by the utility model from another angle;

[0038] Figure 3 This is a cross-sectional view of the ink bag provided by the present invention in the printing state;

[0039] Figure 4 It is a cross-sectional view of the ink bag provided by the utility model in the cleaning state.

[0040] Markings in the figure:

[0041] 100. Ink sac; 10. Main body; 11. First connector; 12. Second connector; 20. Ink supply channel; 30. Ink storage chamber; 31. One-way valve; 32. Filter chamber; 321. Filter channel; 3211. First through hole; 3212. Second through hole; 33. Ink storage chamber; 331. First cavity; 332. Second cavity; 40. Ink outlet chamber; 41. Ink inlet; 42. Cleaning port; 43. Ink outlet; 50. Cleaning channel; 60. Piston assembly; 61. Elastic member; 62. Piston head. DETAILED DESCRIPTION

[0042] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" used in this specification indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0044] The following combination Figures 1 to 4 , the ink bag 100 and the printing device provided in the embodiment of the present application are described in detail through specific examples.

[0045] It should be noted that the printing device (not shown in the figure) is mainly an industrial printer, and of course, it can also be an office printer.

[0046] Please also refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 1 This is a schematic structural diagram of the ink bag provided by the utility model; Figure 2 This is a schematic structural diagram of the ink bag provided by the utility model from another angle; Figure 3 This is a cross-sectional view of the ink bag provided by the present invention in the printing state; Figure 4This is a cross-sectional view of the ink bag provided by the present invention in the cleaned state. An ink bag 100 provided in one embodiment of the present invention is used in a printing device comprising an ink supply line and a print head. The print head generates a suction force on the ink bag 100 during printing. The ink bag 100 comprises a body 10, an ink supply channel 20, an ink storage chamber 30, an ink outlet chamber 40, a cleaning channel 50, and a piston assembly 60. One end of the main body 10 is connected to the ink supply pipeline, and the other end is connected to the printing nozzle; the ink supply channel 20 is arranged in the main body 10 and is connected to the ink supply pipeline; the ink storage chamber 30 is arranged in the main body 10 and is connected to the ink supply channel 20; the ink outlet chamber 40 is arranged in the main body 10, and the ink outlet chamber 40 includes an ink inlet 41, a cleaning port 42 and an ink outlet 43. The ink inlet 41 is connected to the ink storage chamber 30, and the ink outlet 43 is connected to the printing nozzle. A one-way valve 31 is provided in the ink storage chamber 30. The one-way valve 31 can prevent the ink in the ink supply channel 20 from flowing into the ink storage chamber 30 when the ink is not being printed, so as to avoid ink dripping on the surface of the printing nozzle when the printing is not working; one end of the cleaning channel 50 is connected to the ink supply channel 20, and the other end is connected to the cleaning port 42; the piston assembly 60 is movably arranged in the ink outlet chamber 40 to block the ink inlet 41 or the cleaning port 42.

[0047] The ink supply line can introduce ink into the main body 10 and, through the ink supply channel 20, introduce the ink into the ink storage chamber 30 for storage. When ink needs to be introduced into the print head for printing, the negative pressure assembly on the print head can be used to draw air from the ink bag 100, thereby creating a negative pressure within the ink outlet chamber 40 of the ink bag 100 and automatically opening the one-way valve 31. The one-way valve 31 is a conventional spring-loaded valve (not shown), and its specific structure and principle are not described in detail here. The opening of the one-way valve 31 allows ink to continuously flow into the ink storage chamber 30 through the ink supply channel 20 to replenish the negative pressure. Ink in the ink storage chamber 30 can then enter the ink outlet chamber 40 through the ink inlet 41 and be introduced into the print head through the ink outlet 43 on the ink outlet chamber 40, thereby performing inkjet printing. When inkjet printing is stopped, the one-way valve 31 resets and closes.

[0048] In this embodiment, the ink bag 100 is provided with a cleaning channel 50, one end of which is connected to the ink supply channel 20 and the other end is connected to the cleaning port 42 of the ink outlet chamber 40. A piston assembly 60 is movably disposed in the ink outlet chamber 40. When the print head needs to be cleaned, ink is poured into the ink bag 100 through the ink supply channel. The ink sequentially passes through the ink supply channel 20, the cleaning channel 50, the cleaning port 42 in the cleaning channel 50, and the ink outlet chamber 40. The ink then impacts the piston assembly 60 in the ink outlet chamber 40, causing the piston assembly 60 to move within the ink outlet chamber 40 to block the ink inlet 41. The ink used to clean the print head can then flow into the print head through the ink outlet 43 in the ink outlet chamber 40 and be ejected through its nozzles, thereby achieving the effect of cleaning the print head through the cleaning channel 50 of the ink bag 100. Such a setting facilitates the maintenance and cleaning of the print head, avoids ink shortage or blockage of the print head during the printing process, improves printing quality, reduces blockage of the ink sac 100 or the print head due to accumulation of impurities, and extends the service life of the ink sac 100 or the print head.

[0049] It should be noted that a one-way valve 31 is provided between the ink storage chamber 30 and the ink supply channel 20. In a normal, non-operating state (when no negative pressure is formed within the ink outlet chamber 40 or the ink storage chamber 30), the one-way valve 31 is closed, restricting the flow of ink from the ink supply channel 20 into the ink storage chamber 30. This prevents excess ink from flowing into the ink storage chamber 30 and into the ink outlet chamber 40, which could otherwise cause excess ink in the ink storage chamber 30 and ink outlet chamber 40 to drip through the print head due to gravity or other factors. This arrangement effectively prevents ink from being replenished to the ink storage chamber 30 when inkjet printing is not required, thereby preventing excess ink from leaking through the print head and causing waste or environmental pollution.

[0050] In some embodiments, the piston assembly 60 includes an elastic member 61 and a piston head 62; the piston head 62 is disposed in the ink outlet cavity 40 and fits against the inner wall of the ink outlet cavity 40; one end of the elastic member 61 is connected to the piston head 62, and the other end is connected to the inner wall of the ink outlet cavity 40; Figure 3 As shown, in the initial state, the piston head 62 is located between the cleaning port 42 and the ink outlet 43 to block the cleaning port 42; Figure 4 As shown, in the cleaning state, the ink entering the ink outlet cavity 40 through the cleaning port 42 can push the piston head 62 to move between the ink inlet 41 and the ink outlet 43 to block the ink inlet 41, so that the ink in the cleaning channel 50 of the ink bag 100 can flow into the print head through the cleaning port 42, the ink outlet cavity 40 and the ink outlet 43 in sequence and eject ink impurities or air, thereby cleaning the print head or the ink bag. After the cleaning work is completed, the elastic member 61 drives the piston head 62 to return to its original position to block the cleaning port 42.

[0051] When the elastic member 61 is in its natural position, the piston head 62 is positioned between the cleaning port 42 and the ink outlet 43, tightly blocking the cleaning port 42. During printing, the print head draws ink from the ink sac 100, creating a negative pressure within the ink outlet chamber 40 of the ink sac 100. Ink flows from the ink supply channel 20 through the one-way valve 31, the ink reservoir 30, and the ink inlet 41 into the ink outlet chamber 40, then flows through the ink outlet 43 to the print head for printing. Because the piston head 62 seals the cleaning port 42, ink is prevented from flowing into the cleaning channel 50, ensuring a stable and continuous ink supply during printing.

[0052] When the cleaning operation begins, the one-way valve 31 is closed. The air inflator above the ink bag is inflated, pressing down the ink, causing it to flow downward. The ink then flows sequentially through the ink delivery channel 20, the cleaning channel 50, and into the ink outlet chamber 40 through the cleaning port 42. As the ink continues to flow downward, pressure is applied to the piston head 62, overcoming the elastic force of the elastic member 61 and pushing the piston head 62 toward the ink inlet 41. When the piston head 62 moves between the ink inlet 41 and the ink outlet 43, the ink inlet 41 is blocked, preventing the ink entering the ink outlet chamber 40 through the ink inlet 41 from forming a thrust on the piston assembly 60. The ink in the ink bag 100 can be used to clean the print nozzle or the area near the ink outlet 43 and around the piston head 62, and the impurities and air in the print nozzle are ejected through the nozzle orifice. In addition, in the inkjet printing state, the one-way valve 31 will be opened, and the inflation device of the printing equipment will stop inflating. The ink in the ink bag 100 and the cleaning channel 50 will flow downward only by its own gravity. The ink cannot overcome the elastic force of the elastic member 61 and push the piston head 62 away by its own gravity. Therefore, in the inkjet printing state, the piston head 62 blocks the cleaning port 42, and the ink inlet 41 is open, which can ensure that the ink continues to flow out for supply during the printing process.

[0053] When the cleaning process is complete, ink injection stops. At this point, the elastic force of the elastic member 61 acts on the piston head 62 to reset it, moving it back to its initial position. The piston head 62 returns to a position between the cleaning port 42 and the ink outlet 43, re-blocking the cleaning port 42. The ink bag 100 returns to its initial printing state, ready for the next printing operation. Throughout the reset process, the elastic member 61 provides a stable reset force, ensuring that the piston head 62 accurately returns to its initial position, opening the ink inlet 41 and maintaining a normal ink supply path for the ink bag 100.

[0054] It should be noted that the elastic member 61 can be a commonly available spring on the market, and the specific model and size can be selected according to the size of the ink outlet cavity 40 .

[0055] In some embodiments, the diameter of the piston head 62 is substantially the same as the inner diameter of the ink outlet chamber 40, which ensures that the piston head 62 fits tightly against the inner wall of the ink outlet chamber 40. In this way, when printing, ink in the ink outlet chamber 40 can be completely prevented from entering the cleaning port 42, thereby avoiding interference with the normal printing ink supply. Figure 4 As shown, in the cleaning state, the piston head 62 blocks the ink inlet 41 , thereby preventing the ink in the ink outlet cavity 40 from flowing back into the second cavity 332 of the ink storage chamber 33 through the ink inlet 41 .

[0056] In the printing state, Figure 3 As shown, the piston head 62, having approximately the same diameter as the ink outlet chamber 40, substantially completely blocks the cleaning port 42 and the ink outlet chamber 40, forming a tight seal. This allows ink in the ink supply channel 20 to enter the second cavity 332 of the ink reservoir 33 only through the one-way valve 31, and then flow through the ink inlet 41 and the ink outlet chamber 40 to the print head for inkjet printing. Because the piston head 62 blocks the cleaning port 42, ink in the ink supply channel 20 cannot flow through the cleaning port 42 of the cleaning channel 50 into the ink outlet chamber 40, thereby preventing interference with inkjet printing.

[0057] In the cleaning state, when ink enters the cleaning port 42, due to the close fit between the piston head 62 and the ink outlet chamber 40, the pressure exerted by the ink on the piston head 62 can effectively push the piston head 62 toward the ink inlet 41. During the movement, because the piston head 62 has the same diameter as the ink outlet chamber 40, it always maintains good contact with the cavity wall, which can effectively prevent the ink in the ink outlet chamber 40 from flowing back into the second cavity 332 of the ink storage chamber 33 through the ink inlet 41. It also prevents the piston head 62 from being pushed to the middle position of the ink outlet chamber 40 by the opposite thrust, thereby causing the piston head 62 to block the ink outlet 43 and affect the flow of cleaning ink, thereby affecting the cleaning effect of the print head. After cleaning is completed, the elastic member 61 can smoothly push the piston head 62 back to its original position, resealing the cleaning port 42 and preparing for the next printing.

[0058] In some embodiments, the ink storage chamber 30 includes a filter chamber 32 and an ink storage chamber 33. The filter chamber 32 is provided with a filter screen for filtering impurities in the ink; one end of the filter chamber 32 is connected to the ink supply channel 20, and the other end is connected to the ink storage chamber 33.

[0059] When ink flows from the ink supply channel 20 into the ink bag 100, it first enters the filter chamber 32. During this process, the ink is blocked by the filter screen within the filter chamber 32. The filter screen has a specific pore size. Impurities larger than the pore size cannot pass through the filter screen and are intercepted on the side of the filter chamber 32 near the ink supply channel 20. For example, some large flocculent impurities or foreign dust particles may adhere to the filter screen surface or accumulate near the entrance of the filter chamber 32.

[0060] After being filtered by the filter, the clean ink can pass through the filter smoothly and flow from the filter chamber 32 into the ink storage chamber 33. In the ink storage chamber 33, the ink is temporarily stored, waiting to be supplied to the nozzle through the one-way valve 31 and the ink outlet cavity 40 for printing when the print nozzle is working. In this way, only pure ink participates in the subsequent printing process, effectively avoiding the adverse effects of impurities on the printing system. Through such a setting, the filter chamber 32 can effectively intercept impurities in the ink, such as flocculent impurities, dust particles, etc. The filtered ink is purer, which can significantly reduce the damage to the print nozzle caused by impurities and reduce the risk of nozzle clogging, thereby improving the printing quality and making the printed images and text clearer and more accurate.

[0061] In some embodiments, a filter channel 321 is provided on the filter chamber 32 , one end of the filter channel 321 is connected to the filter chamber 32 , and the other end is connected to the cleaning channel 50 , and the other end of the filter channel 321 is connected to the ink storage chamber 33 through a one-way valve 31 .

[0062] In some embodiments, the ink storage chamber 33 includes a first cavity 331 and a second cavity 332, and a one-way valve 31 is arranged between the first cavity 331 and the second cavity 332. The one-way valve 31 is used to allow the ink in the first cavity 331 to flow into the second cavity 332 in the inkjet printing state, and to limit the ink in the first cavity 331 from flowing into the second cavity 332 when the printing is not in progress or in the cleaning state; the first cavity 331 is connected to the filter channel 321; the second cavity 332 is connected to the ink inlet 41.

[0063] By dividing the ink storage chamber 33 into a first cavity 331 and a second cavity 332, and connecting them with a one-way valve 31, the direction of ink flow within the ink storage chamber 33 is more precisely controlled. This effectively prevents ink in the first cavity 331 from flowing into the second cavity 332 when not printing or in the cleaning state, thereby reducing the adverse effects that may arise from reverse flow of ink in the filter channel 321, the filter chamber 32, and the ink supply channel 20.

[0064] In some embodiments, the first cavity 331 and the second cavity 332 are disposed back to back and are respectively located on two opposite sides of the main body (10).

[0065] In this embodiment, since the first cavity 331 and the second cavity 332 are disposed opposite to each other, the ink storage capacity of the first cavity 331 and the second cavity 332 can be increased compared to when the first cavity 331 and the second cavity 332 are located on the same surface. Thus, the ink storage capacity of the ink bag 100 is increased.

[0066] In addition, it should be noted that transparent plastic films are covered on the opposite sides of the main body 10 to respectively cover the ink supply channel 20, the filter channel 321, the first cavity 331 of the ink storage chamber 33, the second cavity 332 of the ink storage chamber 33 and the cleaning channel 50. The main body 10 is made of an integrally molded plastic material, and the plastic films are respectively connected to the outer peripheral walls of each cavity part for sealing. Specifically, bonding or ultrasonic welding can be used. Of course, other existing conventional connection methods can also be used.

[0067] In some embodiments, a first through hole 3211 and a second through hole 3212 are respectively provided at both ends of the filter channel 321. The filter channel 321 is connected to the filter chamber 32 through the first through hole 3211, and the filter channel 321 is respectively connected to the first cavity 331 of the ink storage chamber 33 and the cleaning channel 50 through the second through hole 3212.

[0068] By providing a first through-hole 3211 and a second through-hole 3212 at each end of the filter channel 321, when ink enters the ink bag 100, it can enter the filter chamber 32 through the ink supply channel 20 for filtration. The filtered ink then enters the filter channel 321 through the first through-hole 3211 and flows through the second through-hole 3212 into the first cavity 331 and the cleaning channel 50. During inkjet printing, the one-way valve 31 is open, and the ink in the first cavity 331 flows through the one-way valve 31 into the second cavity 332 of the ink reservoir 33 for replenishment and supply. Furthermore, the second through-hole 3212 is also connected to the cleaning channel 50, eliminating the need for a separate small hole for connection to the cleaning channel 50. The second through-hole 3212 simultaneously connects the first cavity 331 of the ink reservoir 33 and the cleaning channel 50.

[0069] In some embodiments, the main body 10 includes a first connector 11 and a second connector 12; one end of the first connector 11 is connected to the ink supply pipe, and the other end is connected to the ink supply channel 20; one end of the second connector 12 is connected to the print head, and the other end is connected to the ink outlet cavity 40.

[0070] The first connector 11 is used to guide the ink into the ink supply line, and then enter the main body 10 through the ink supply line. The ink in the ink outlet cavity 40 enters the second connector 12 through the ink outlet 43 and is introduced into the print head through the second connector 12 for printing.

[0071] The present invention also provides a printing device comprising an ink cartridge (not shown), the aforementioned ink sac 100, and a printer (not shown). The ink cartridge is used to store ink and includes an ink supply line; one end of the ink sac 100 is connected to the ink supply line so that ink is introduced into the ink sac 100 through the ink supply line for storage; the printer includes a print head and a negative pressure assembly, which is disposed within the print head and connected to the ink sac 100 to create negative pressure within the ink sac 100 so that the ink in the ink sac 100 enters the print head.

[0072] Ink in the ink cartridge flows through the first connector 11 to the ink delivery channel 20 of the ink sac 100. Because the ink cartridge is typically positioned vertically above the ink sac 100, the ink flows smoothly into the ink sac 100 under its own gravity. The ink sac 100 receives and stores ink from the ink cartridge, serving as both temporary storage and buffering filtration.

[0073] When the printer begins printing, the negative pressure assembly on the print head begins operating. This creates a lower pressure environment than the internal pressure of the ink sac 100, generating negative pressure within the sac. This pressure differential draws the ink within the sac 100 through the second connector 12 and toward the print head. Following the received print command, the print head ejects the ink in precise droplets onto paper or other print media, completing the printing process.

[0074] In this embodiment, the ink sac 100 is provided with a cleaning channel 50, one end of which is connected to the ink supply channel 20 and the other end is connected to the cleaning port 42 of the ink outlet chamber 40. A piston assembly 60 is movably disposed in the ink outlet chamber 40. When the print head 100 needs to be cleaned, ink is poured into the ink sac 100 through the ink supply channel. The ink sequentially passes through the ink supply channel 20, the cleaning channel 50, the cleaning port 42 in the cleaning channel 50, and the ink outlet chamber 40. The ink then impacts the piston assembly 60 in the ink outlet chamber 40, causing the piston assembly 60 to move within the ink outlet chamber 40, blocking the ink inlet 41 and opening the cleaning port 42. Ink for cleaning the print head can then flow into the print head through the ink outlet port 43 in the ink outlet chamber 40 and be ejected through its nozzles, thereby achieving the effect of cleaning the print head through the cleaning channel 50 of the ink sac 100. Such a setting facilitates the maintenance and cleaning of the print head, avoids ink shortage or blockage of the print head during the printing process, improves printing quality, reduces blockage of the ink sac 100 or the print head due to accumulation of impurities, and extends the service life of the ink sac 100 or the print head.

[0075] It should be noted that the ink bag 100 provided in the embodiment of the present invention only shows the part related to the technical problem to be solved by the embodiment of the present invention. It can be understood that the ink bag 100 provided in the embodiment of the present invention also includes other structures for realizing the functions of the ink bag 100, including but not limited to ink detection structure, structure for distinguishing multiple colors of ink, etc.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ink sac (100) applied to a printing device, wherein the printing device comprises an ink delivery pipeline and a printing nozzle, wherein the printing nozzle can generate a suction force on the ink sac (100) during a printing operation, wherein: The ink bag (100) comprises: A main body (10), one end of the main body (10) is connected to the ink supply pipe, and the other end is connected to the print head; an ink delivery channel (20), the ink delivery channel (20) being arranged on the main body (10) and connected to the ink delivery pipeline; an ink storage cavity (30), the ink storage cavity (30) being arranged in the main body (10) and being in communication with the ink supply channel (20), a one-way valve (31) being provided between the ink storage cavity (30) and the ink supply channel (20), the one-way valve (31) being capable of preventing ink in the ink supply channel (20) from flowing into the ink storage cavity (30) when inkjet printing is not in progress; an ink outlet cavity (40), the ink outlet cavity (40) being arranged on the main body (10), the ink outlet cavity (40) comprising an ink inlet (41), a cleaning port (42) and an ink outlet (43), the ink inlet (41) being connected to the ink storage cavity (30), and the ink outlet (43) being connected to the print head; a cleaning channel (50), one end of the cleaning channel (50) being in communication with the ink supply channel (20), and the other end of the cleaning channel (50) being in communication with the cleaning port (42); A piston assembly (60) is movably disposed in the ink outlet cavity (40) to block the ink inlet (41) or the cleaning port (42).

2. The ink bag (100) according to claim 1, characterized in that: The piston assembly (60) includes an elastic member (61) and a piston head (62); The piston head (62) is disposed in the ink outlet cavity (40) and is in contact with the inner wall of the ink outlet cavity (40); One end of the elastic member (61) is connected to the piston head (62), and the other end is connected to the inner wall of the ink outlet cavity (40); In an initial state, the piston head (62) is located between the cleaning port (42) and the ink outlet (43) to block the cleaning port (42); In the cleaning state, the ink entering the ink outlet chamber (40) through the cleaning port (42) can push the piston head (62) to move between the ink inlet (41) and the ink outlet (43) to block the ink inlet (41), and after the cleaning work is completed, the elastic member (61) drives the piston head (62) to reset.

3. The ink bag (100) according to claim 2, characterized in that: The diameter of the piston head (62) is substantially the same as the inner diameter of the ink outlet cavity (40).

4. The ink bag (100) according to claim 1, characterized in that The ink storage chamber (30) includes a filter chamber (32) and an ink storage chamber (33), and the filter chamber (32) is provided with a filter screen for filtering impurities in the ink; One end of the filter chamber (32) is connected to the ink supply channel (20), and the other end is connected to the ink storage chamber (33).

5. The ink bag (100) according to claim 4, characterized in that: The filter chamber (32) is provided with a filter channel (321), one end of the filter channel (321) is communicated with the filter chamber (32), and the other end is respectively connected to the ink storage chamber (33) and the cleaning channel (50).

6. The ink bag (100) according to claim 5, characterized in that: The ink storage chamber (33) comprises a first cavity (331) and a second cavity (332); the one-way valve (31) is arranged between the first cavity (331) and the second cavity (332); the one-way valve (31) is used to allow the ink in the first cavity (331) to flow into the second cavity (332) in an inkjet printing state, and to restrict the ink in the first cavity (331) from flowing into the second cavity (332) in a non-printing state or a cleaning state; The first cavity (331) is connected to the filtering channel (321); The second cavity (332) is connected to the ink inlet (41).

7. The ink bag (100) according to claim 6, characterized in that: The first cavity (331) and the second cavity (332) are respectively located on two opposite sides of the main body (10).

8. The ink bag (100) according to claim 5, characterized in that: A first through hole (3211) and a second through hole (3212) are respectively provided at both ends of the filter channel (321); the filter channel (321) is connected to the filter chamber (32) through the first through hole (3211); and the filter channel (321) is respectively connected to the ink storage chamber (33) and the cleaning channel (50) through the second through hole (3212).

9. The ink bag (100) according to claim 1, characterized in that: The main body (10) includes a first joint (11) and a second joint (12); One end of the first joint (11) is connected to the ink supply pipe, and the other end is connected to the ink supply channel (20); One end of the second connector (12) is connected to the print head, and the other end is connected to the ink outlet cavity (40).

10. A printing device, characterized in that: include: An ink cartridge, the ink cartridge being used to store ink and comprising an ink delivery pipeline; The ink sac (100) according to any one of claims 1 to 9, wherein one end of the ink sac (100) is connected to the ink supply pipe, so that ink is introduced into the ink sac (100) through the ink supply pipe for storage; A printer comprising a print head and a negative pressure component, wherein the negative pressure component is arranged in the print head and connected to the ink sac (100) and is used to form a negative pressure on the ink sac (100) so that the ink in the ink sac (100) enters the print head.

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