Liquid container and liquid dispensing device

Abstract

To provide a liquid storage body that can suppress damage of a gusset part.SOLUTION: A liquid storage body includes: a liquid storage part for storing liquid therein; a gusset part which is formed along the liquid storage part and in which a lateral part of the liquid storage part is folded on an inner side of the liquid storage part; and a stopper part for coming into contact with other parts to suppress flexure that may be generated in the gusset part.SELECTED DRAWING: Figure 6

Description

Technical Field

[0004] ,

[0006] , ,

[0001] The present disclosure relates to a liquid container and a liquid discharge device.

Background Art

[0002] Patent Document 1 discloses an exterior body that houses a liquid container inside and protects the liquid container from impacts applied from the outside. Further, a liquid container housed in the exterior body is disclosed, in which a flange portion is bent inward of the liquid container while a pressing portion of the exterior body presses the flange portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the configuration of Patent Document 1, a dedicated exterior body for housing the liquid container is prepared, and the liquid container cannot be housed in the exterior body unless the flange portion of the liquid container is pressed by the pressing portion of the exterior body, and damage to the flange portion cannot be suppressed.

[0005] Therefore, the technology according to the present disclosure aims to provide a liquid container capable of suppressing damage to the flange portion without using a dedicated product.

Means for Solving the Problems

[0006] Book The liquid container according to the disclosure includes a liquid storage portion that stores liquid inside, a flange portion that is formed along the liquid storage portion and in which a side surface portion of the liquid storage portion is folded inward of the liquid storage portion, It has a stopper portion that protrudes outward from the gusset portion, and the stopper portion prevents bending that may occur in the gusset portion. by contacting other components Suppress restrain ru, ko and is characterized by the above. [Effects of the Invention]

[0007] According to the liquid container described herein, damage to the gusset can be suppressed without the need for a special product. [Brief explanation of the drawing]

[0008] [Figure 1] A schematic perspective view showing the external configuration of the liquid dispensing device. [Figure 2] A schematic exploded perspective view showing the assembly of the case and liquid container. [Figure 3] A schematic perspective view showing the configuration of the liquid container. [Figure 4] A cross-sectional view showing the structure of a conventional liquid container. [Figure 5] This diagram shows an example of how a conventional gusset comes into contact with other parts. [Figure 6] A diagram showing the configuration of the liquid container according to this embodiment. [Figure 7] A schematic diagram showing how the stopper protects the gusset. [Figure 8] A schematic cross-sectional view of a liquid container according to the second embodiment. [Figure 9] A schematic cross-sectional view of a liquid container according to the third embodiment. [Modes for carrying out the invention]

[0009] [First Embodiment] <Liquid discharge device> Figure 1 is a schematic perspective view showing the external configuration of the liquid dispensing device 10, which constitutes the liquid dispensing system. Figure 1 shows three arrows X, Y, and Z indicating mutually orthogonal directions. Arrows X, Y, and Z are also shown in other figures referenced herein as appropriate, corresponding to Figure 1.

[0010] The directions indicated by arrows X, Y, and Z correspond to the orientation of the liquid dispensing device 10 and the liquid container 100 when in normal use. The normal use of the liquid dispensing device 10 is when the liquid dispensing device 10 is placed on a horizontal plane. Hereinafter, the directions indicated by arrows X, Y, and Z will be referred to as the "X direction," "Y direction," and "Z direction," respectively. Of the X directions, one direction will be called the "+X direction," and the opposite direction of the +X direction will be called the "-X direction." Of the Y directions, one direction will be called the "+Y direction," and the opposite direction of the +X direction will be called the "-Y direction." Of the Z directions, one direction will be called the "+Z direction," and the opposite direction of the +X direction will be called the "-Z direction."

[0011] The X, Y, and Z directions will be explained in the order of Z, Y, and X. The Z direction is parallel to the direction of gravity. The -Z direction is the direction of gravity, and the +Z direction is the direction of anti-gravity. The Z direction coincides with the vertical direction (height direction) of the liquid dispensing device 10. In the following explanation, when we refer to the liquid dispensing device 10 and the liquid container 100 as "up" or "down," unless otherwise specified, it means the vertical direction relative to the direction of arrow Z, where "up" means the +Z direction and "down" means the -Z direction. Also, "horizontal direction" means the direction perpendicular to the Z direction.

[0012] The Y direction indicates the direction in which the liquid container 100 is attached to and detached from the liquid dispensing device 10, and coincides with the direction parallel to the front-to-back direction (depth direction) of the liquid dispensing device 10. The +Y direction indicates the direction in which the mounting unit 105, including the liquid container 100, is attached to the liquid dispensing device 10, and coincides with the direction from the front side to the rear side of the liquid dispensing device 10. The -Y direction indicates the direction in which the mounting unit 105 is removed from the liquid dispensing device 10, and coincides with the direction from the rear side to the front side of the liquid dispensing device 10. In the following description, when we refer to the liquid dispensing device 10 and the liquid container 100 as "front" or "rear," unless otherwise specified, we mean the front-to-back direction with respect to the direction of arrow Y, where "front" means the +Y direction and "rear" means the -Y direction.

[0013] The X direction indicates a direction parallel to the left - right direction (width direction) of the liquid ejection device 10. The - X direction coincides with the direction from the right side to the left side when facing the front surface of the liquid ejection device 10, and the + X direction coincides with the direction from the left side to the right side, conversely. In the following description, when referring to "right" or "left" regarding the liquid ejection device 10 and the liquid container 100, unless otherwise specified, it means the left - right direction based on the direction of arrow X. "Right" means the + X direction, and "left" means the - X direction.

[0014] In this embodiment, the liquid ejection device 10 is an inkjet printer, and the liquid ejection system is an inkjet - type printing system. The liquid consumed by ejection in the liquid ejection device 10 of this embodiment is ink. The ink may be, for example, pigment ink. The liquid ejection device 10 forms an image by ejecting ink droplets and recording ink dots on a medium to be processed. The medium to be processed is, for example, printing paper.

[0015] The liquid container 100 in this embodiment is a container that stores the ink ejected in the liquid ejection device 10. By attaching the liquid container 100 to the liquid ejection device 10, the liquid container 100 is connected to the liquid introduction part inside the liquid ejection device 10, and the ink is supplied to the ejection execution part by a pump.

[0016] <Assembly state of case 61 and liquid container 100>[[ID=1十三条]] Figure 2 is a schematic exploded perspective view showing the stage of assembling the case 61 and the liquid container 100. First, the schematic configuration of the case 61 will be described below, and then the schematic configuration of the liquid container 100 will be described.

[0017] <Case 61> The case 61 protects the liquid container 100 from impacts applied from the outside by housing the liquid container 100 inside during transportation and the like of the liquid container 100.

[0018] The case 61 has a roughly rectangular parallelepiped shape with the Y direction as its longitudinal direction. The case 61 is composed of a case body 61a, which is a hollow box with openings in the +Z and +Y directions, and a case lid 61b. The case 61 is made of a resin material such as polypropylene.

[0019] When considering logistics efficiency and the size of the liquid dispensing device 10, it is preferable that the size of the inside of the case 61 and the size of the liquid container 100 are approximately the same. However, manufacturing tolerances and clearances when fitting the liquid container 100 inside the case 61 should be taken into consideration.

[0020] <Liquid container 100> In this embodiment, the liquid container 100 is an ink pack. The liquid container 100 has a bag portion 110 and a connecting member 120. The liquid container 100 is a gusset-type ink pack composed of multiple films. The bag portion 110 is a container that has a liquid storage section inside for storing liquid. The bag portion 110 is flexible. The flexibility of the bag portion 110 may be such that it bends under its own weight, or it may maintain its shape under its own weight and bend when a load greater than its own weight is applied. The shape of the bag portion 110 is approximately rectangular when viewed from the Z direction, with the Y direction being the longitudinal direction. The bag portion 110 is joined by overlapping at least four sheet members and welding or bonding the outer edges of each sheet member.

[0021] The sheet members are made of a material that has flexibility, gas barrier properties, and liquid impermeability. Each sheet member may be made of a film material such as polyethylene terephthalate (PET), nylon, or polyethylene. Each sheet member may be made by laminating multiple films made of the aforementioned materials. In this case, for example, the outer layer may be made of a PET or nylon film with excellent impact resistance, and the inner layer may be made of a polyethylene film with excellent ink resistance. Furthermore, a layer to which aluminum or the like has been vapor-deposited may be added to the laminated structure.

[0022] The connecting member 120 is attached to the +Y direction end of the bag portion 110. The connecting member 120 is fixed to the front end (+Y direction side) of the mounting body 105 in the mounting direction. The connecting member 120 has the function of connecting to the connection receiving part of the corresponding liquid dispensing device 10 and the function of fixing the liquid container 100 to the case 61. The appearance of the connecting member 120 will be roughly described. The shape of the connecting member 120 is generally a roughly rectangular parallelepiped with the X direction as its longitudinal direction. The width of the connecting member 120 in the X direction is smaller than the width of the bag portion 110 in the X direction. The main body of the connecting member 120 is manufactured by molding a resin material such as polypropylene.

[0023] <Liquid container 100> Figure 3 is a schematic perspective view showing the configuration of the liquid container 100 according to this embodiment.

[0024] The bag portion 110 includes a bottom portion 201, a top portion 202, a first side member 503a, a second side member 503b, a first stopper member 505a, a third side member 504a, a fourth side member 504b, and a second stopper member 505b. The end of the first stopper member 505a on the +X side in the longitudinal direction is joined by being sandwiched between the first side member 503a and the second side member 503b. The end of the second stopper member 505b on the -X side in the longitudinal direction is joined by being sandwiched between the third side member 504a and the fourth side member 504b.

[0025] The bottom portion 201 is a bottom member positioned in the -Z direction (i.e., at the bottom surface position). The top portion 202 faces the bottom portion 201. The top portion 202 is a top member positioned in the +Z direction (i.e., at a higher position than the bottom portion 201) than the bottom portion 201. The first side member 503a is a side member that connects one end of the top portion 202 to one end of the first stopper member 505a. The second side member 503b is a side member that connects one end of the first stopper member 505a to one end of the bottom portion 201. The third side member 504a is a side member that connects the other end of the top portion 202 to one end of the second stopper member 505b. The fourth side member 504b is a side member that connects one end of the second stopper member 505b to the other end of the bottom portion 201. Hereinafter, unless there is a need to distinguish between the first side member 503a and the second side member 503b and the third side member 504a and the fourth side member 504b, they will simply be referred to as the "side portion". Similarly, unless there is a need to distinguish between the first stopper member 505a and the second stopper member 505b, they will simply be referred to as the "stopper portion". The side portion bends in accordance with changes in the amount of liquid in the liquid container 100. The liquid container 100 is formed along the bag portion 110 and has a gusset portion in which the side portion of the bag portion 110 is folded inward. The stopper portion suppresses bending that may occur in the gusset portion (i.e., the side portion) due to contact with other parts (for example, the case body 61a).

[0026] In the liquid container 100, if an impact is applied to the liquid container 100 from the outside of the case 61 (see Figure 2), the liquid inside the liquid container 100 may oscillate. This oscillation of the liquid inside the liquid container 100 causes the side surface to bend. Repeated bending of the side surface leads to fatigue accumulation in the side surface. This can potentially cause the side surface to break.

[0027] Furthermore, if the liquid inside the liquid container 100 oscillates, especially in the X direction, the inner wall surface of the case 61 and the side surface may come into contact. In this case, the surface of the side surface may be scraped or cracks may occur on the surface of the side surface. In other words, if the inner wall surface of the case 61 and the side surface come into contact, there is a risk that the side surface (i.e., the gusset) may be damaged.

[0028] Therefore, the liquid container 100 according to this embodiment has a stopper portion 505 that suppresses bending of the side portion.

[0029] <Regarding damage to the gusset area> To facilitate understanding of the stopper portion according to this embodiment, we will first describe the conventional liquid container 100. Note that components identical to or corresponding to those in the liquid container 100 according to this embodiment will be described using the same names and reference numerals.

[0030] Figure 4 shows the configuration of a conventional liquid container 100. Figure 4(a) is a schematic cross-sectional view of a conventional bag portion 110. As shown in Figure 4(a), the conventional bag portion 110 had a bottom portion 201 and a top portion 202. The conventional bag portion 110 had a first side portion 203 connecting one end of the bottom portion 201 and one end of the top portion 202, and a second side portion 204 connecting the other end of the bottom portion 201 and the other end of the top portion 202. The connections of each part in the conventional bag portion 110 were joined by heat welding or the like. The conventional side portions could also function as gussets. Figure 4(b) is a schematic enlarged view showing the bent state of the region c indicated by the dashed line in Figure 4(a). Figure 4(c) is a schematic enlarged view showing the expanded state of the region c indicated by the dashed line in Figure 4(a).

[0031] In conventional designs, if the liquid inside the bag portion 110 oscillates for any reason, the side portion repeatedly flexes and extends at angles such as θb shown in Figure 4(b) and θb' shown in Figure 4(c). This can damage the side portion, potentially leading to breakage of the bent portion.

[0032] Figure 5 shows an example of how the gusset portion of a conventional case comes into contact with the inside of the side wall of the case 61. When an external impact is applied while the liquid container 100 is stored in the case 61, the liquid inside the liquid container 100 oscillates. When the oscillating liquid causes the side portion of the bag 110 to bend, the apex of the gusset portion on the side portion may come into contact with the inner wall of the case body 61a. When the gusset portion comes into contact with the inner wall of the case body 61a, there is a risk that abrasion or cracks may occur on the surface of the apex of the gusset portion. In other words, when the gusset portion comes into contact with the inner wall of the case body 61a, there is a risk that the gusset portion will be damaged.

[0033] <Regarding the protection of the gusset area> Figure 6 shows the configuration of the liquid container 100 according to this embodiment. Figure 6(a) is a cross-sectional view taken along line VI-VI in Figure 2. In this embodiment, the other end of the first side member 503a, one end of the first stopper member 505a, and the other end of the second side member 503b are joined in advance. That is, the first stopper member 505a is sandwiched and joined between the first side member 503a and the second side member 503b. Subsequently, one end of the upper portion 202 and one end of the first side member 503a are joined, and one end of the bottom portion 201 and one end of the second side member 503b are joined. On the other hand, similarly on the opposite side portion, the other end of the third side member 504a, one end of the second stopper member 505b, and the other end of the fourth side member 504b are joined in advance. Subsequently, the other end of the top portion 202 and one end of the third side member 504a are joined to the other end of the bottom portion 201 and one end of the fourth side member 504b. One example of a joining method is heat welding. In this embodiment, the first side member 503a and the second side member 503b function as gussets on one end of the bag portion 110. Similarly, the third side member 504a and the fourth side member 504b function as gussets on the other end of the bag portion 110.

[0034] Figure 6(b) is a schematic enlarged view showing how the region c indicated by the dashed line in Figure 6(a) is bent. Figure 6(c) is a schematic enlarged view showing how the region c indicated by the dashed line in Figure 6(a) is stretched out.

[0035] Referring to Figures 4 and 6, the change in angle in the conventional gusset section and the change in angle in the gusset section of this embodiment can be compared and expressed by the following formula. (θb'-θb) / 2=θc'-θc (Formula 1)

[0036] However, this is conditional on the following relationship being true. θx=θy (Formula 2) θx'=θy' (Formula 3)

[0037] As described above, in this embodiment, the change in angle in the gusset portion is halved compared to the conventional design. In other words, in this embodiment, damage to the gusset portion is reduced compared to the conventional design. One end of the first stopper member 505a (the end on the +X direction side) is sandwiched and joined by the other end of the first side member 503a (the end on the +X direction side) and the other end of the second side member 503b (the end on the +X direction side). The area where the first stopper member 505a and the first side member 503a are joined is the same as the area where the first stopper member 505a and the second side member 503b are joined. The other end of the first stopper member 505a (the end on the -X direction side) protrudes outward (towards the -X direction side) from the joining surface of the first side member 503a and the first stopper member 505a and the second side member 503b. The upper limit of the length to which the first stopper member 505a protrudes is from the joint surface between the first side member 503a, the first stopper member 505a, and the second side member 503b to one end (the end on the -X direction side) of the top portion 202 and the bottom portion 201. The lower limit of the length to which the first stopper member 505a protrudes is preferably the same length as the width (length L in the figure) at the joint surface between the bottom portion 201 and the second side member 503b. The length of the joint surface between the top portion 202 and the first side member 503a is also the same length (length L).

[0038] One end of the second stopper member 505b (the end on the -X direction) is sandwiched and joined by the other end of the third side member 504a (the end on the -X direction) and the other end of the fourth side member 504b (the end on the -X direction). The area where the second stopper member 505b and the third side member 504a are joined is the same as the area where the second stopper member 505b and the fourth side member 504b are joined. The other end of the second stopper member 505b (the end on the +X direction) protrudes outward (towards the +X direction) from the joining surface of the third side member 504a, the second stopper member 505b, and the fourth side member 504b. The upper limit of the length to which the second stopper member 505b protrudes is from the joint surface of the third side member 504a, the second stopper member 505b, and the fourth side member 504b to the other end (the end on the +X direction side) of the top portion 202 and the bottom portion 201. The lower limit of the length to which the second stopper member 505b protrudes is preferably the same length as the width (length L in the figure) at the joint surface of the bottom portion 201 and the fourth side member 504b. The length of the joint surface of the top portion 202 and the third side member 504a is also the same length (length L).

[0039] <Effect of causing the stopper portion 505 to protrude from the inside to the outside of the bag portion 110> Figure 7 is a schematic diagram showing how the stopper portion 505 protects the gusset portion.

[0040] As shown in Figure 7, when the liquid container 100 is housed in the case 61 and an impact is applied from the outside, the liquid agitates inside the bag portion 110. In this embodiment, even if the liquid agitates inside the bag portion 110, when one gusset portion bends, the stopper portion 505 of the other gusset portion acts as a stopper, preventing the other gusset portion from contacting the inner wall of the case body 61a. In the illustrated example, when one gusset portion (the third side member 504a and the fourth side member 504b) bends, the first stopper member 505a of the other gusset portion (the first side member 503a and the second side member 503b) functions as a stopper. The first stopper member 505a contacts the inner wall of the case body 61a, preventing the first side member 503a and the second side member 503b from contacting the inner wall of the case body 61a. In other words, the first stopper member 505a protects the first side member 503a and the second side member 503b. The stopper portion 505 may be made of the same material (for example, film) as the material that constitutes the side portion.

[0041] <Summary> As described above, in this embodiment, when one gusset portion bends, the stopper portion of the other gusset portion contacts the inner wall of the case body 61a. This reduces fatigue accumulated by repeated bending of the gusset portion and damage caused by the gusset portion directly contacting the inner wall of the case body 61a. Therefore, with the liquid container 100 according to this embodiment, damage to the gusset portion can be suppressed without using a special part. Furthermore, if the material constituting the stopper portion and the material constituting the bag portion 110 are made of the same material, an inexpensive liquid container 100 can be provided. Moreover, if the material constituting the stopper portion includes a material that is harder than the material constituting the bag portion 110, the rigidity will be increased and reliability will be higher than when the stopper portion and the bag portion 110 are made of the same material.

[0042] [Second Embodiment] This embodiment aims to provide a more reliable and inexpensive liquid container 100. Hereinafter, components similar to those in the first embodiment will be described using the same reference numerals, and their descriptions will be omitted. The focus will be on the differences from the first embodiment.

[0043] Figure 8 is a schematic cross-sectional view of the liquid container 100 according to this embodiment. The following description assumes that the container was cut along the cutting line corresponding to line VI-VI in Figure 2. As shown in Figure 8, the bag portion 110 according to this embodiment has a fifth side portion 803 and a sixth side portion 804.

[0044] The fifth side portion 803 has a third stopper portion 805a. The sixth side portion 804 has a fourth stopper portion 805b. In this embodiment as well, when there is no need to distinguish between the fifth side portion 803 and the sixth side portion 804, they are simply referred to as side portions. Similarly, when there is no need to distinguish between the third stopper portion 805a and the fourth stopper portion 805b, they are simply referred to as stopper portions.

[0045] In this embodiment, the side portion is folded back to create a joining area. Then, the stopper portion is sandwiched inside the joining area. By joining the stopper portion sandwiched in the joining area, the stopper portion is fixed to the side portion. After that, the top portion 202 and the bottom portion 201 are joined to the side portion. Specifically, the fifth side portion 803 is folded back to create a joining area. Then, the third stopper portion 805a is sandwiched inside the joining area. Note that the portion of the fifth side portion 803 that sandwiches and covers the third stopper portion 805a is called the first cover portion 806a. Similarly, the sixth side portion 804 is folded back to create a joining area. Then, the fourth stopper portion 805b is sandwiched inside the joining area. Note that the portion of the sixth side portion 804 that sandwiches and covers the fourth stopper portion 805b is called the second cover portion 806b. Hereinafter, unless there is a need to distinguish between the first cover portion 806a and the second cover portion 806b, they will simply be referred to as the "cover portion".

[0046] With this configuration, even if a crack occurs due to a malfunction when joining the side portion and the stopper portion, the stopper portion is covered from the inside by the cover portion. Therefore, leakage of liquid from the gap at the joint surface between the side portion and the stopper portion can be suppressed. Similarly, even if the joint between the side portion and the stopper portion is damaged due to repeated bending of the side portion, leakage of liquid from the gap at the joint surface between the side portion and the stopper portion can be suppressed. This increases reliability compared to the first embodiment. Furthermore, since each side portion is composed of a single component, costs can be reduced. As described above, in this embodiment, by sandwiching the stopper portion with the side portion and covering it from the inside, the risk of liquid leakage from the joint surface between the side portion and the stopper portion can be reduced. Therefore, with the configuration according to this embodiment, a more reliable and inexpensive liquid container 100 can be provided.

[0047] [Third Embodiment] This embodiment aims to provide a more reliable and inexpensive liquid container 100. Hereinafter, components similar to those in the first embodiment will be described using the same reference numerals, and their descriptions will be omitted. The focus will be on the differences from the first embodiment.

[0048] Figure 9 is a schematic cross-sectional view of the liquid container 100 according to this embodiment. The following description assumes that the container was cut along the cutting line corresponding to the line VI-VI in Figure 2. As shown in Figure 9, the bag portion 110 according to this embodiment has a seventh side portion 903, an eighth side portion 904, a fifth stopper portion 905a, and a sixth stopper portion 905b. The fifth stopper portion 905a is formed by folding back the seventh side portion 903. The sixth stopper portion 905b is formed by folding back the eighth side portion 904.

[0049] To form the stopper portion, first, the side portion is folded from the inside to the outside of the bag portion 110 (referred to as the "first fold") to create a joining area. Next, the side portion is further extended to the outside of the bag portion 110, and then folded back from the outside to the inside of the bag portion 110. Subsequently, at the same position as the first fold, it is folded again from the inside to the outside of the bag portion 110. In this embodiment, the stopper portion is formed by folding the side portion from the inside to the outside of the bag portion 110 at least twice, and from the outside to the inside of the bag portion 110 at least once. In other words, in this embodiment, the side portion is folded back at least three times.

[0050] This allows the inside of the stopper section to have a four-layer structure using a single side section. The joints of the side sections are joined by heat welding or the like, as in the embodiment described above. Subsequently, the bottom section 201 and the top section 202 are joined to the side section.

[0051] In this embodiment, the number of parts can be reduced by folding back one side portion to form a stopper portion. As described above, by making the inside of the stopper portion a four-layer structure using one side portion, it is possible to provide a liquid container 100 that is even more reliable and inexpensive than the first embodiment.

[0052] [Other embodiments] In the first embodiment, the inner wall of the case body 61a did not have a cushioning material, but a cushioning material (for example, a sponge member) may be provided on the inner wall of the case body 61a to mitigate the impact when the stopper part comes into contact with the inner wall of the case body 61a.

[0053] In the first embodiment, the material constituting the stopper portion 505 and the material constituting the side portion were the same material, but the material constituting the stopper portion 505 may include a different material from that of the side portion. Specifically, the material constituting the stopper portion 505 may include a resin member (for example, polypropylene) that is harder than the film. With this configuration, the strength of the stopper portion 505 can be improved.

[0054] This embodiment includes the following configurations and methods.

[0055] <Configuration 1> A liquid container, A liquid storage section that contains liquid inside, A gusset portion formed along the liquid storage portion, wherein the side portion of the liquid storage portion is folded inward towards the liquid storage portion, A stopper portion that suppresses bending that may occur in the gusset portion due to contact with other parts, A liquid container characterized by having the following features.

[0056] <Configuration 2> The liquid storage section has a bottom surface and an upper surface facing the bottom surface. The side portion connects the bottom portion and the top portion. The liquid container described in Configuration 1.

[0057] <Structure 3> The stopper portion protrudes outward from the gusset portion, A liquid container as described in configuration 1 or configuration 2.

[0058] <Structure 4> The stopper portion is formed by folding the side portion at least twice from the inside to the outside of the liquid storage portion, and at least once from the outside to the inside of the liquid storage portion. A liquid container as described in any one of the three components (Composition 1 to Composition 3).

[0059] <Composition 5> The material constituting the stopper portion includes a material different from that of the side portion. A liquid container as described in any one of the items 1 to 4 of the configuration.

[0060] <Composition 6> The stopper portion is made of a material that is more rigid than the side portion. The liquid container described in configuration 5.

[0061] <Composition 7> The stopper portion is fixed by being sandwiched using the side portion. A liquid container as described in any one of the items 1 to 6 of the configuration.

[0062] <Structure 8> The side portion is composed of a first side member and a second side member different from the first side member. The stopper portion is sandwiched and joined between the first side member and the second side member. A liquid container as described in any one of the items 1 through 7 of the configuration.

[0063] <Composition 9> The liquid containment section is made of a flexible film. A liquid container as described in any one of the eight components.

[0064] <Composition 10> The stopper portion is in contact with the inside of the case that houses the liquid container. A liquid container as described in any one of the items 1 through 9 of the configuration.

[0065] <Composition 11> A liquid container described in any one of the configurations 1 to 10, A case for housing the liquid container described in any one of the items 1 to 10 of the configuration, A liquid dispensing device characterized by having the following features. [Explanation of symbols]

[0066] 201 Bottom part 202 Top part 503a First side member 503b Second side member 504a Third side member 504b Fourth side member 505a First stopper member 505b Second stopper member

Claims

1. A liquid container, A liquid storage section that contains liquid inside, A gusset portion formed along the liquid storage portion, wherein the side portion of the liquid storage portion is folded inward towards the liquid storage portion, A stopper portion that protrudes outward from the gusset portion, It has, The stopper portion suppresses the bending that may occur in the gusset portion by contacting other parts. A liquid container characterized by the following features.

2. The liquid storage section has a bottom surface and an upper surface facing the bottom surface. The side portion connects the bottom portion and the top portion. The liquid container according to claim 1.

3. The stopper portion is formed by folding the side portion at least twice from the inside to the outside of the liquid storage portion and at least once from the outside to the inside of the liquid storage portion. A liquid container according to claim 1 or 2.

4. The material constituting the stopper portion includes a material different from that of the side portion. A liquid container according to claim 1 or 2.

5. The stopper portion is made of a material that is more rigid than the side portion. The liquid container according to claim 4.

6. The stopper portion is fixed by being sandwiched using the side portion. A liquid container according to claim 1 or 2.

7. The side portion is composed of a first side member and a second side member different from the first side member. The stopper portion is sandwiched and joined between the first side member and the second side member. A liquid container according to claim 1 or 2.

8. The liquid containment section is made of a flexible film. A liquid container according to claim 1 or 2.

9. The stopper portion is in contact with the inside of the case that houses the liquid container. A liquid container according to claim 1 or 2.

10. A liquid container according to claim 1 or 2, A case for housing the liquid container described in claim 1 or 2, A liquid dispensing device characterized by having the following features.

Images