Liquid container and method of liquid injection into a liquid container

Abstract

The present application provides a liquid container capable of improving the reusability of the liquid container and a method of injecting liquid into the liquid container. The liquid container includes a container bag that contains liquid and a supply portion that is attached to the container bag. The supply portion includes a liquid supply port that is connectable to a supply tube of a liquid ejection device, a liquid supply flow path that connects an inside of the container bag and the liquid supply port, a liquid injection port that is capable of injecting liquid into the inside of the container bag independently of the liquid supply port, a liquid injection flow path that connects the liquid injection port and the inside of the container bag, and a valve structure that is capable of opening and closing the liquid injection flow path multiple times.

Description

Technical Field

[0001] This invention relates to a liquid container and a method for injecting liquid into the liquid container. Background Technology

[0002] For example, Patent Document 1 discloses a liquid container having a liquid holding bag and a liquid supply port, the liquid holding bag containing ink (an example of a liquid), and the liquid supply port for supplying the liquid contained in the liquid holding bag to a liquid dispensing device. In such a liquid container, a liquid injection port for injecting ink into the liquid holding bag is provided independently of the liquid supply port. As a liquid injection method for injecting liquid into such a liquid container, after ink is injected into the liquid holding bag via the liquid injection port, the liquid injection port is sealed by means of heat riveting or the like.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2014-233947

[0004] However, in such liquid containers, the liquid inlet is sealed after liquid is injected. Therefore, it is impossible to re-inject liquid into the container. Thus, improving the reusability of the liquid container is desirable. Summary of the Invention

[0005] The liquid container that solves the above-mentioned technical problems comprises: a container bag for containing liquid; and a supply unit installed in the container bag, the supply unit having: a liquid supply port for connecting to a supply pipe of a liquid ejection device; a liquid supply flow path connecting the interior of the container bag to the liquid supply port; a liquid injection port for injecting liquid into the interior of the container bag independently of the liquid supply port; a liquid injection flow path connecting the liquid injection port to the interior of the container bag; and a valve structure capable of being opened and closed multiple times in the liquid injection flow path.

[0006] The liquid injection method for solving the above-mentioned technical problems is a liquid injection method for a liquid container having a container bag for containing liquid and a supply part installed on the container bag. The supply part has: a liquid supply port that can be connected to a supply pipe of a liquid ejection device; a liquid supply flow path that connects the interior of the container bag to the liquid supply port; a liquid injection port that can inject liquid into the interior of the container bag independently of the liquid supply port; a liquid injection flow path that connects the liquid injection port to the interior of the container bag; and a valve structure that can be opened and closed multiple times in the liquid injection flow path. The liquid injection method includes: injecting liquid from an injection pipe different from the supply pipe into the interior of the container bag while the valve structure is open; and closing the valve structure after injecting liquid from the injection pipe into the interior of the container bag. Attached Figure Description

[0007] Figure 1 This is a schematic diagram showing the liquid ejection device according to the first embodiment.

[0008] Figure 2 This is a cross-sectional view showing the liquid container of the first embodiment.

[0009] Figure 3 This is a cross-sectional view showing the liquid container of the second embodiment.

[0010] Figure 4 This is a cross-sectional view showing the liquid container of the third embodiment.

[0011] Explanation of reference numerals in the attached figures

[0012] 10: Liquid ejection device; 11: Liquid ejection section; 12: Liquid ejection head; 13: Nozzle; 14: Conveying section; 20: Assembly section; 22: Supply flow path; 23: Supply pipe; 24: Injection pipe; 30: Liquid container; 32: Supply section; 33: Container bag; 51: Liquid supply section; 53: Liquid supply port; 54: Liquid supply flow path; 54A: Inner wall surface; 55: Second valve structure; 61: Liquid injection section; 63: Liquid injection port; 64: Liquid injection flow path; 64A: Inner wall surface; 65: First valve structure; 71: First spring component; 72: Second spring component; 73: Valve plug; 73A: One end; 73B: The other end; 74: Gasket; 75: Holding surface; 81: Elastic component; 88: Duckbill valve; 90: Medium. Detailed Implementation

[0013] First Implementation Method

[0014] Hereinafter, an embodiment of a liquid container and a method for injecting liquid into the liquid container will be described with reference to the accompanying drawings.

[0015] Composition of liquid ejection device 10

[0016] like Figure 1 As shown, the liquid ejection device 10 is configured to perform printing by ejecting liquid onto the medium 90. The liquid ejection device 10 can also be an inkjet printer that performs printing by ejecting ink, an example of a liquid, onto the medium 90. The medium 90 can be, for example, paper, cloth, vinyl material, plastic parts, metal parts, etc.

[0017] The liquid ejection device 10 includes a liquid ejection section 11. The liquid ejection section 11 is configured to eject liquid into a medium 90. The liquid ejection section 11 includes a liquid ejection head 12. The liquid ejection head 12 ejects liquid into the medium 90. The liquid ejection head 12 is configured to eject the liquid contained in the liquid container 30 described below.

[0018] The liquid ejector head 12 has multiple nozzles 13. The liquid ejector head 12 ejects liquid from each of the multiple nozzles 13 onto the medium 90 for printing. The liquid ejector head 12 can be either serial or row-type. In a serial type, printing is performed by ejecting liquid onto the medium 90 while the liquid ejector head 12 is moving. In a row-type type, the liquid ejector head 12 is positioned as an elongated strip along the width of the medium 90, and printing is performed by ejecting liquid onto the medium 90.

[0019] The liquid ejection device 10 may also include a conveying section 14. The conveying section 14 is configured to convey the medium 90. The conveying section 14 conveys the medium 90 (not shown) to the liquid ejection head 12. The conveying section 14 conveys the medium 90 printed by the liquid ejection head 12 to the outside of the liquid ejection device 10. The conveying section 14 may also include a roller.

[0020] The liquid dispensing device 10 may also include an assembly section 20. The assembly section 20 allows for the assembly and disassembly of the liquid container 30. The assembly section 20 may also allow for the assembly of multiple liquid containers 30 corresponding to the color of the liquid. The liquid container 30 holds the liquid supplied to the liquid dispensing head 12. The liquid container 30 may also be an ink cartridge.

[0021] The liquid dispensing device 10 may also include a supply flow path 22. The liquid dispensing device 10 may also include multiple supply flow paths 22 corresponding to the color of the liquid. The supply flow path 22 is a flow path for supplying liquid from the liquid container 30 mounted on the assembly section 20 to the liquid dispensing head 12. When the liquid container 30 is mounted on the assembly section 20, the upstream end of the supply flow path 22 is connected to the liquid container 30. The downstream end of the supply flow path 22 is connected to the liquid dispensing head 12.

[0022] The liquid ejection device 10 includes a supply pipe 23. The supply pipe 23 is located at the upstream end of the supply flow path 22. The supply pipe 23 can be inserted into the liquid container 30 mounted on the assembly part 20. The supply pipe 23 may also be a supply needle. The liquid ejection device 10 may also include a pump (not shown) that supplies liquid from the liquid container 30 to the liquid ejection head 12. The supply flow path 22 may also utilize a water head to supply liquid.

[0023] An injection tube 24 can be inserted into the liquid container 30, which has been removed from the assembly part 20. The injection tube 24 is different from the supply tube 23. The injection tube 24 is a component used to inject liquid into the liquid container 30. By inserting the injection tube 24 into the liquid container 30, liquid can be injected into the liquid container 30 from a liquid injection container (not shown). The injection tube 24 may also have the same shape as the supply tube 23.

[0024] Composition of liquid container 30

[0025] like Figure 2 As shown, the liquid container 30 includes a supply section 32 and a container bag 33. The container bag 33 contains the liquid. The container bag 33 is made of, for example, a flexible material. The container bag 33 is bag-shaped.

[0026] The supply unit 32 is a component used to supply the liquid contained in the container bag 33 to the outside. The supply unit 32 is installed on the container bag 33. Specifically, the supply unit 32 seals the opening area of ​​the container bag 33. The supply unit 32 is installed on the container bag 33, for example, by heat fusion. Thus, the container bag 33 is sealed.

[0027] The supply unit 32 includes a liquid supply unit 51. The liquid supply unit 51 is configured to supply liquid from the container 33 to the outside. When the liquid container 30 is mounted on the assembly unit 20, the liquid supply unit 51 supplies liquid from the container 33 to the liquid dispensing device 10.

[0028] The liquid supply unit 51 has a liquid supply port 53 and a liquid supply flow path 54. That is, the supply unit 32 has a liquid supply port 53 and a liquid supply flow path 54. The liquid supply port 53 communicates with the interior of the receiving bag 33 through the liquid supply flow path 54.

[0029] The liquid supply port 53 can be connected to the supply pipe 23 of the liquid ejection device 10. In particular, when the liquid container 30 is assembled into the assembly part 20, the supply pipe 23 is inserted into the liquid supply port 53. Before the liquid container 30 is assembled into the assembly part 20, the liquid supply port 53 can also be sealed with a membrane.

[0030] The liquid supply path 54 connects the interior of the receiving bag 33 to the liquid supply port 53. The liquid supply path 54 may also be equipped with a check valve in the orientation in which liquid will not leak from the interior of the receiving bag 33 through the liquid supply port 53.

[0031] The liquid supply unit 51 may also include a second valve structure 55. That is, the supply unit 32 may also include a second valve structure 55. The second valve structure 55 is provided in the liquid supply flow path 54. The second valve structure 55 is a valve structure capable of being opened and closed multiple times in the liquid supply flow path 54. The second valve structure 55 is opened by the insertion of the supply pipe 23. The second valve structure 55 is closed by the removal of the supply pipe 23. Alternatively, the gasket 74 described below may be pressed into the inner wall surface 54A constituting the liquid supply flow path 54.

[0032] The second valve structure 55 may also include a second spring component 72. The second valve structure 55 may also be a valve structure including the second spring component 72. The second valve structure 55 closes the valve due to the elastic force of the second spring component 72. The second valve structure 55 opens the valve by overcoming the elastic force of the second spring component 72.

[0033] The supply unit 32 includes a liquid injection unit 61. The liquid injection unit 61 is configured to inject liquid into the receiving bag 33.

[0034] The liquid injection unit 61 includes a liquid injection port 63 and a liquid injection flow path 64. That is, the supply unit 32 also includes a liquid injection port 63 and a liquid injection flow path 64. The liquid injection port 63 is provided independently of the liquid supply port 53. The liquid injection port 63 communicates with the interior of the receiving bag 33 via the liquid injection flow path 64. When injecting liquid into the receiving bag 33, the injection tube 24 is inserted into the liquid injection port 63. The liquid injection port 63 is configured to inject liquid into the interior of the receiving bag 33 via the liquid injection flow path 64. Before the liquid container 30 is assembled to the assembly unit 20, the liquid injection port 63 can also be sealed with a membrane.

[0035] The liquid injection path 64 connects the liquid injection port 63 to the interior of the receiving bag 33. The liquid injection path 64 may also be equipped with a check valve in the orientation in which liquid will not leak from the interior of the receiving bag 33 through the liquid injection port 63.

[0036] The liquid injection unit 61 may also include a first valve structure 65. That is, the supply unit 32 may also include a first valve structure 65. The first valve structure 65 is provided in the liquid injection flow path 64. The first valve structure 65 is a valve structure capable of being opened and closed multiple times in the liquid injection flow path 64. The first valve structure 65 is opened by the insertion of the injection pipe 24. The first valve structure 65 is closed by the removal of the injection pipe 24.

[0037] The first valve structure 65 may also include a first spring component 71. The first valve structure 65 may also be a valve structure including the first spring component 71. The first valve structure 65 closes the valve due to the elastic force of the first spring component 71. The first valve structure 65 opens the valve by overcoming the elastic force of the first spring component 71.

[0038] In detail, the first valve structure 65 includes a first spring component 71, a valve plug 73, and a gasket 74. The gasket 74 is made of an elastic material such as rubber or an elastomer. The gasket 74 is disposed at the end of the liquid injection flow path 64. The gasket 74 is pressed into the inner wall surface 64A that constitutes the liquid injection flow path 64.

[0039] The valve plug 73 performs the opening and closing action of the first valve structure 65. The valve plug 73 is disposed in the liquid injection flow path 64. The valve plug 73 is positioned further inside the gasket 74 in the liquid injection flow path 64. One end 73A of the valve plug 73 can contact the gasket 74. The other end 73B of the valve plug 73 is inserted into the first spring member 71. The valve plug 73 can slide along the liquid injection flow path 64.

[0040] A first spring component 71 is disposed in the liquid injection flow path 64. The first spring component 71 is positioned further inward than the valve plug 73 in the liquid injection flow path 64. The other end 73B of the valve plug 73 is inserted into the first spring component 71. The first spring component 71 applies an elastic force to the valve plug 73 toward the gasket 74.

[0041] The liquid injection section 61 has a retaining surface 75. The retaining surface 75 is disposed in the liquid injection flow path 64. The retaining surface 75 is the inner wall surface of the liquid injection flow path 64. The retaining surface 75 is the surface that retains the first spring member 71.

[0042] When the injection tube 24 is not inserted into the liquid injection port 63, the elastic force from the first spring member 71 causes one end 73A of the valve plug 73 to contact the gasket 74. This closes the first valve structure 65.

[0043] When the injection tube 24 is inserted into the liquid injection port 63, the injection tube 24 overcomes the elastic force from the first spring member 71, causing the valve plug 73 to slide such that one end 73A of the valve plug 73 separates from the gasket 74. This opens the first valve structure 65.

[0044] In particular, it is possible to inject liquid into the container bag 33 multiple times via the liquid injection port 63, including a first injection of liquid into the liquid container 30 and a second and subsequent injection of liquid into the liquid container 30.

[0045] Thus, as a liquid injection method for injecting liquid into the liquid container 30, the first valve structure 65 is opened by inserting the injection tube 24 into the liquid injection port 63. With the first valve structure 65 open, liquid from the injection tube 24 can be injected into the interior of the container bag 33. After the liquid from the injection tube 24 has been injected into the interior of the container bag 33, the injection tube 24 is pulled out from the liquid injection port 63. This closes the first valve structure 65.

[0046] Functions and effects of the first implementation method

[0047] The function and effects of the first embodiment are explained.

[0048] (1-1) The supply unit 32 includes a liquid inlet 63, a liquid injection flow path 64, and a first valve structure 65. The first valve structure 65 can be opened and closed multiple times in the liquid injection flow path 64. According to this configuration, the liquid container 30 can be injected with liquid from the liquid inlet 63 into the container bag 33 multiple times. Thus, liquid can be injected into the liquid container 30 multiple times. Therefore, the reusability of the liquid container 30 can be improved.

[0049] In particular, even without opening and sealing the opening in the receiving bag 33 each time liquid is injected, liquid can be injected into the liquid container 30 multiple times. Even without sealing and opening the sealed liquid injection port 63 after injecting liquid into the receiving bag 33, liquid can be injected into the liquid container 30 multiple times. Even without injecting liquid through the liquid supply port 53, liquid can be injected into the liquid container 30 multiple times.

[0050] (1-2) The first valve structure 65 is opened by inserting the injection tube 24. The first valve structure 65 is closed by pulling out the injection tube 24. According to this configuration, the first valve structure 65 can be opened and closed by inserting and pulling out the injection tube 24.

[0051] (1-3) The first valve structure 65 closes the valve by the elastic force of the first spring member 71. The first valve structure 65 opens the valve by overcoming the elastic force of the first spring member 71. The second valve structure 55 closes the valve by the elastic force of the second spring member 72. The second valve structure 55 opens the valve by overcoming the elastic force of the second spring member 72. According to this configuration, the first valve structure 65 and the second valve structure 55 can be opened and closed by using the first spring member 71 and the second spring member 72 respectively.

[0052] Second Implementation Method

[0053] Next, the second embodiment will be described. In the following description, for configurations that are the same as those in the previously described embodiments, repeated descriptions will be omitted or simplified, while configurations that are different from those in the previously described embodiments will be described.

[0054] like Figure 3 As shown, in the second embodiment, the first valve structure 65 may also include an elastic member 81. The elastic member 81 may be, for example, rubber. The elastic member 81 can be pressed into the liquid injection port 63. The elastic member 81 can be pressed into the liquid injection flow path 64.

[0055] The elastic member 81 is fixed to the inside of the liquid injection port 63 in a manner that blocks the liquid injection flow path 64. The elastic member 81 can also be placed at any position in the liquid injection flow path 64, as long as the inside of the receiving bag 33 can be isolated from the outside. The elastic member 81 is fixed to the inside of the liquid injection port 63 by means of heat riveting or the like. The injection tube 24 can also be a tube with a sharp tip.

[0056] The first valve structure 65 opens by passing through the elastic member 81 via the injection tube 24. This allows liquid to be injected into the receiving bag 33 via the liquid injection port 63. The first valve structure 65 closes by closing the through hole formed by the injection tube 24 when it is pulled out of the elastic member 81. This isolates the interior of the receiving bag 33 from the exterior.

[0057] The function and effects of the second implementation method

[0058] The function and effects of the second embodiment are explained.

[0059] (2-1) The first valve structure 65 includes an elastic member 81 that can be pressed into the liquid inlet 63. The first valve structure 65 opens by passing through the elastic member 81 via the injection tube 24. With this configuration, the first valve structure 65 can open and close the liquid inlet 63 even without using the first spring member 71, the valve plug 73, and the gasket 74. Thus, the first valve structure 65 can be constructed with fewer components.

[0060] Third Implementation Method

[0061] Next, the third embodiment will be described.

[0062] like Figure 4 As shown, in the third embodiment, the first valve structure 65 can also be a duckbill valve 88. The duckbill valve 88 can be pressed into the liquid inlet 63. The duckbill valve 88 can be pressed into the liquid injection flow path 64. The duckbill valve 88 is a check valve that allows liquid to pass through in the direction of liquid injection from the liquid inlet 63 into the receiving bag 33. The liquid injection section 61 may also be equipped with a check valve other than the duckbill valve 88 to replace the duckbill valve 88.

[0063] When using the duckbill valve 88, the first valve structure 65 opens the duckbill valve 88 by utilizing the inflow pressure of the liquid. That is to say, the first valve structure 65 can also open the valve by starting liquid delivery and close the valve by stopping liquid delivery.

[0064] The function and effects of the third implementation method

[0065] The function and effects of the third embodiment are explained.

[0066] (3-1) The first valve structure 65 is a duckbill valve 88. With this configuration, the first valve structure 65 can open and close the liquid inlet 63 even without using the first spring component 71, the valve plug 73, and the gasket 74. Therefore, the valve structure can be constructed with fewer components. Furthermore, liquid can be injected even without using the injection pipe 24.

[0067] Change Example

[0068] This embodiment can be modified and implemented as follows. This embodiment and the following modifications can be combined and implemented to the extent that they do not contradict each other technically.

[0069] In the first embodiment, the first valve structure 65 and the second valve structure 55 may be the same structure, or they may be different structures, such as having different sizes. In the first embodiment, the liquid supply section 51 and the liquid injection section 61 may also have the same configuration. The first spring component 71 and the second spring component 72 may also be the same type of component.

[0070] In the second embodiment, the elastic member 81 only needs to be able to close the through hole formed by the injection tube 24 by pressing force. The elastic member 81 may also be an elastic material such as an elastomer.

[0071] In the third embodiment, liquid can also be injected into the receiving bag 33 by inserting the injection tube 24 into the liquid injection port 63. In the third embodiment, air bubbles can also be expelled from the inside of the receiving bag 33 by inserting a flow path tube (not shown) into the liquid injection port 63. In the third embodiment, the mechanism for expelling air bubbles from the inside of the receiving bag 33 in the supply unit 32 can also be provided independently of the liquid injection unit 61. Therefore, the expulsion of air bubbles from the inside of the receiving bag 33 can be performed without inserting the injection tube 24 from the liquid injection port 63.

[0072] The second valve structure 55 can also be any structure. Even if the second valve structure 55 uses the second spring component 72, it may not be the same as the first valve structure 65 using the first spring component 71. The second spring component 72 may be the same as the first spring component 71 or different from the first spring component 71.

[0073] The liquid container 30 can also be housed within the housing. The housing is configured to expose the liquid supply port 53. The housing can also be configured to expose the liquid inlet port 63. The liquid container 30 can also be fitted with a handle for gripping. The liquid container 30 can also be fitted with an adapter to assist in fitting it to the mounting part 20.

[0074] Liquids can be arbitrarily selected as long as they can be recorded on the medium 90 by adhering to it. For example, inks also include substances obtained by dissolving, dispersing, or mixing functional material particles composed of solid substances such as pigments and metal particles in a solvent, including various compositions such as water-based inks, oil-based inks, gel inks, and hot-melt inks.

[0075] As used in this specification, the term "at least one" means one or more of the desired options. For example, when there are two options, "at least one" means only one option or both options. As another example, when there are three or more options, "at least one" means only one option or any combination of two or more options.

[0076] appendix

[0077] The following describes the technical concept and its effects derived from the above-described embodiments and modifications. This technical concept and its effects can be combined with each other within a technically compatible framework.

[0078] [1] A liquid container includes: a container bag for containing liquid; and a supply unit installed in the container bag, the supply unit having: a liquid supply port for connecting to a supply pipe of a liquid ejection device; a liquid supply flow path for connecting the interior of the container bag to the liquid supply port; a liquid injection port for injecting liquid into the interior of the container bag independently of the liquid supply port; a liquid injection flow path for connecting the liquid injection port to the interior of the container bag; and a valve structure for opening and closing multiple times in the liquid injection flow path.

[0079] According to this configuration, the liquid container can be injected with liquid multiple times from the liquid inlet into the container bag. Therefore, liquid can be injected into the liquid container multiple times, thus improving the reusability of the liquid container.

[0080] [2] In the above-described liquid container, the valve structure opens by inserting an injection pipe, which is different from the supply pipe, and closes by pulling out the injection pipe. According to this configuration, the valve structure can be opened and closed by inserting and pulling out the injection pipe.

[0081] [3] In the above-mentioned liquid container, the supply part has a second valve structure, which can be opened and closed multiple times in the liquid supply flow path. The valve structure is a first valve structure. The first valve structure closes the valve by the elastic force of the first spring component and opens the valve by overcoming the elastic force of the first spring component. The second valve structure closes the valve by the elastic force of the second spring component and opens the valve by overcoming the elastic force of the second spring component.

[0082] According to this configuration, the first valve structure and the second valve structure can be opened and closed using the first spring component and the second spring component respectively.

[0083] [4] In the above-described liquid container, the valve structure includes an elastic member that can be pressed into the liquid inlet, and the valve is opened by passing through the elastic member via the injection pipe. According to this configuration, compared with the case where the valve structure uses a spring member, the valve structure can be constructed with fewer parts.

[0084] [5] In the above-described liquid container, the valve structure is a duckbill valve. According to this configuration, compared with the case where the valve structure uses a spring component, the valve structure can be constructed with fewer components.

[0085] [6] A method for injecting liquid into a liquid container, the liquid container comprising a container bag for containing liquid and a supply part installed on the container bag, the supply part comprising: a liquid supply port for connection to a supply pipe of a liquid ejection device; a liquid supply flow path for connecting the interior of the container bag to the liquid supply port; a liquid injection port for injecting liquid into the interior of the container bag independently of the liquid supply port; a liquid injection flow path for connecting the liquid injection port to the interior of the container bag; and a valve structure for opening and closing multiple times in the liquid injection flow path, the liquid injection method comprising: injecting liquid from an injection pipe different from the supply pipe into the interior of the container bag while the valve structure is open; and closing the valve structure after injecting liquid from the injection pipe into the interior of the container bag. According to this configuration, the same effect as [1] can be achieved.

Claims

1. A liquid container, characterized in that, have: Container bag, for holding liquids; and The supply unit is installed in the container bag. The supply unit has: The liquid supply port can be connected to the supply pipe of the liquid ejection device; A liquid supply path connects the interior of the containment bag to the liquid supply port; The liquid inlet is capable of injecting liquid into the interior of the containment bag independently of the liquid supply inlet; A liquid injection path connects the liquid injection port to the interior of the containment bag; as well as The valve structure is capable of being opened and closed multiple times in the liquid injection flow path.

2. The liquid container according to claim 1, characterized in that, The valve structure opens by inserting an injection pipe, which is different from the supply pipe, and closes by pulling out the injection pipe.

3. The liquid container according to claim 2, characterized in that, The supply unit has a second valve structure, which can be opened and closed multiple times in the liquid supply flow path. The valve structure is the first valve structure. The first valve structure closes the valve by the elastic force of the first spring component and opens the valve by overcoming the elastic force of the first spring component. The second valve structure closes the valve by the elastic force of the second spring component and opens the valve by overcoming the elastic force of the second spring component.

4. The liquid container according to claim 2, characterized in that, The valve structure includes an elastic component that can be pressed into the liquid injection port, and the valve is opened by passing through the elastic component via the injection tube.

5. The liquid container according to claim 1, characterized in that, The valve structure is a duckbill valve.

6. A method for injecting liquid into a liquid container, characterized in that, The liquid container includes a container bag for containing liquid and a supply section installed in the container bag. The supply unit has: The liquid supply port can be connected to the supply pipe of the liquid ejection device; A liquid supply path connects the interior of the containment bag to the liquid supply port; The liquid inlet is capable of injecting liquid into the interior of the containment bag independently of the liquid supply inlet; A liquid injection path connects the liquid injection port to the interior of the containment bag; as well as The valve structure allows for multiple opening and closing within the liquid injection path. The liquid injection method includes: With the valve structure open, liquid from an injection pipe different from the supply pipe is injected into the interior of the containment bag; as well as The valve structure is closed after liquid from the injection tube is injected into the interior of the containment bag.

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