Liquid ejecting apparatus

Abstract

The invention relates to a liquid ejecting apparatus. The apparatus includes a tank and a wall. The canister includes a canister container and a membrane. The canister container includes a chamber. The chamber is capable of accommodating a liquid to be supplied to an ejection head provided to eject the liquid. The chamber has an opening at a side of the canister container. The contour of the opening is surrounded by a first rib. The membrane seals the opening. The wall is disposed at a position facing the membrane and includes a protruding portion protruding toward the membrane. The protruding portion faces a second rib disposed on the tank container and separated from the first rib. The protruding portion does not face the first rib.

Description

Technical Field

[0001] Some aspects of the embodiments relate to liquid ejection devices. Background Art

[0002] An inkjet recording apparatus (which is an example of a liquid ejecting apparatus) includes an ink tank capable of containing ink to be supplied to a recording head configured to eject liquid. In a structure according to the related art, generally, an ink tank is provided for each ink ejectable from the recording head, and the ink tanks are arranged in a row in one direction. In the ink tank according to the related art, a containing chamber configured to contain ink is formed by bonding a film to a tank container (one side of the tank container is open).

[0003] Japanese Patent Laid-Open No. 2016-168835 discloses a liquid ejecting apparatus having a structure in which a plurality of ink tanks are provided with sufficient gaps so that the respective films are not damaged due to the ink tanks contacting each other.

[0004] However, in the structure disclosed in Japanese Patent Laid-Open No. 2016-168835, since the tanks are arranged with sufficient intervals between them, there is a risk of an increase in the size of the equipment.

[0005] Aspects of the embodiments provide a liquid ejection apparatus capable of suppressing leakage of liquid while suppressing an increase in the size of the apparatus. Summary of the invention

[0006] A liquid ejection device includes a tank and a wall. The tank includes a tank container and a membrane. The tank container includes a chamber. The chamber is capable of accommodating liquid to be supplied to an ejection head configured to eject liquid. The chamber has an opening at a side of the tank container. The outline of the opening is surrounded by a first rib. The membrane seals the opening. The wall is arranged at a position facing the membrane and includes a protruding portion protruding toward the membrane. The protruding portion faces a second rib separated from the first rib and provided on the tank container. The protruding portion does not face the first rib.

[0007] Further features of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a perspective view of the recording apparatus according to the first embodiment.

[0009] Figure 2A , 2B is a side view showing the structure of the ink tank containing yellow ink according to the first embodiment.

[0010] Figure 3A , 3BIt is a view for explaining a rib to which a film is heat-fused in the ink tank according to the first embodiment.

[0011] Figure 4A , 4B 2 is a view for explaining the structure of the black / color ink tank according to the first embodiment.

[0012] Figure 5 is a perspective view of a housing, viewed from above, on which the ink tank according to the first embodiment can be fixed.

[0013] Fig. 6A , 6B 2 is a view for explaining the restriction of the Z-direction movement of the ink tank according to the first embodiment.

[0014] Fig. 7A , 7B It is a view for explaining the positional relationship between the ink tank and the housing according to the first embodiment.

[0015] Fig. 8A , 8B It is a view for explaining the structure of the ink tank and the shell according to the second embodiment.

[0016] Fig. 9A , 9B It is a view for explaining the structure of the ink tank and the shell according to the third embodiment. DETAILED DESCRIPTION

[0017] Embodiments of the present disclosure will be described below with reference to the accompanying drawings. However, the embodiments described below should not be construed as limiting the present disclosure. Not all features described in the embodiments must be combined to provide the solutions proposed in the present disclosure. The relative arrangement, shape, etc. of the components described in the embodiments are merely examples and are therefore not intended to limit the scope of the present disclosure.

[0018] The term "recording" used here includes not only the case of forming information with meaning (such as characters, graphics, etc.), but also various cases of forming images, designs, patterns, etc. (regardless of whether it has meaning) on ​​a recording medium, or the case of processing the medium. It is not important whether the "recorded" entity is visually perceptible to the human eye. Although it is assumed in this embodiment that the "recording medium" is paper, it can be cloth, a plastic sheet, a film, etc.

[0019] The term "ink" (sometimes referred to as "liquid") should also be given a broad interpretation, as is the case with the above-mentioned definition of "recording". Therefore, the term refers to a liquid that can be used to form an image, design, pattern, etc. on a recording medium by being applied to the recording medium, to process the recording medium, or to process the ink (for example, to coagulate a colorant contained in the ink applied to the recording medium or to make it insoluble). First embodiment

[0020] Figure 1 : is a perspective view of an inkjet recording device 50 (hereinafter referred to as "recording device 50"), which is an example of a liquid ejecting device to which the disclosed structure is applied. The recording device 50 includes a supply roller (not shown) configured to supply a recording medium (not shown), a conveying roller 1 configured to convey the recording medium, and a pressure roller 2 configured to rotate as a follower when driven by the rotation of the conveying roller 1. The recording medium is conveyed onto a pressure plate 3 while being sandwiched between the conveying roller 1 and the pressure roller 2. The conveying roller 1 is a metal roller having fine irregularities formed on its surface so as to generate a large frictional force. The pressure roller 2 is elastically pushed against the conveying roller 1 by a pusher (e.g., a spring) not shown.

[0021] The platen 3 supports the back side of the recording medium so as to maintain a fixed distance or a predetermined distance between the inkjet surface of the recording head 4 (jet head) configured to eject ink and the front side of the recording medium facing the inkjet surface. The recording medium supported by the platen 3 is discharged to the outside of the recording device 50 through an unillustrated discharge roller and a spur gear (spur) as a rotating member after an image is formed thereon by the recording head 4, and the spur gear is configured to rotate as a driven member when driven by the rotation of the discharge roller. The discharge roller is a rubber roller having a large friction coefficient. The spur gear is elastically pushed against the discharge roller by a pusher (e.g., a spring not shown).

[0022] The recording head 4 is mounted on the carriage 7, and can reciprocate in the X direction along the guide rails 5 and 6 arranged above and below itself by a driver (e.g., a motor not shown). When recording is performed on a recording medium, the recording head 4 ejects ink while moving along the carriage 7 in the X direction, so as to record a line of an image having a predetermined length in the Y direction. Thereafter, the recording medium is conveyed by a predetermined amount through the conveying roller 1 and the pinch roller 2. Then, the recording head 4 records a line of an image on the recording medium again.

[0023] The X direction and the Y direction are horizontal directions intersecting each other (orthogonal to each other in this embodiment), and the Z direction is a direction intersecting both the X direction and the Y direction (orthogonal to each other in this embodiment), and corresponds to the gravity direction.

[0024] The recording head 4 includes a device (e.g., a heating resistor element) configured to generate thermal energy as energy for ink ejection. A scheme that causes a change in the state of the ink by utilizing such thermal energy (film boiling) is used here. This achieves high-density and high-definition recording. The ejection scheme adopted by the recording head 4 is not limited to the thermal energy scheme. For example, other known schemes such as vibration energy may be used.

[0025] A plurality of nozzle rows for ejecting inks of different colors are provided for the corresponding colors in the recording head 4. A plurality of ink tanks 8 independent of each other are fixed to the main body of the apparatus in a manner corresponding to the colors of the ink ejected from the recording head 4. The ink tanks 8 are connected to the recording head 4 through a plurality of supply tubes 10 corresponding to the corresponding colors of the inks through a joint not shown. The ink contained in each ink tank 8 is supplied to a corresponding one of the nozzle rows of the recording head 4 through a corresponding one of the supply tubes 10 independently of the other supply tubes.

[0026] The recovery unit 11 is arranged at the non-recording area in a manner facing the ink ejection surface of the recording head 4. The non-recording area is an area located within the reciprocating range of the recording head 4 but outside the passing range of the conveyed recording medium. The recovery unit 11 includes: a cap configured to cover the ink ejection surface of the recording head 4; a suction mechanism configured to forcibly suck out ink from the recording head 4 while covering the ink ejection surface; and a wiper configured to wipe the ink ejection surface clean.

[0027] Each ink tank 8 is provided for ink of a corresponding color. Supply pipes 10 are connected to the ink tanks 8, respectively. An ink tank 8K containing black ink, an ink tank 8C containing cyan ink, an ink tank 8M containing magenta ink, and an ink tank 8Y containing yellow ink are provided in the recording device 50. These ink tanks are collectively referred to as ink tanks 8. Each ink tank 8 is fixed to a housing 301 provided in the recording device 50. In the present embodiment, for the ink tanks 8C, 8M, and 8Y all containing color inks, a common component design is adopted, and the shape of the ink tank 8K containing black ink is different from that of the other three ink tanks.

[0028] On the top of the ink tank 8, there is provided an inlet port 23 (see FIG. 2 ) through which a user injects ink from a container containing ink (e.g., from an ink bottle) into the ink tank 8. For each color of ink, a cover member 22 for sealingly closing the inlet port 23 is provided in an openable and closable manner.

[0029] The structure of the ink tank 8 according to the present embodiment will be described in detail below with reference to Figures 2, 3 and 6. Figure 2 is a set of side views showing the structure of an ink tank 8Y containing yellow ink. Figure 2A It is a side view of the left side of the ink tank 8Y when the recording apparatus 50 is viewed from the front. Figure 2B It is a side view of the right side of the ink tank 8Y when the recording apparatus 50 is viewed from the front.

[0030] Since the basic structure of the ink tanks other than the ink tank 8Y is the same as that of the ink tank 8Y, the description thereof is omitted. That is, although the description and drawings of the ink tanks refer to the ink tank 8Y, it is not limited to the ink tank only, and the description is also applicable to other ink tanks.

[0031] The ink injected through the inlet port 23 flows through the flow channel 141 and then enters the ink containing chamber 127 through the opening 142. The opening 126 provided in or near the bottom of the ink containing chamber 127 communicates with the pipe joint 24 connected to the supply pipe 10 through the communication channel 125. The pipe joint 24 also serves as an outlet portion through which the ink contained in the ink containing chamber 127 is discharged to the outside of the ink tank 8.

[0032] The left side surface of the ink containing chamber 127 is open. A film not shown is heat-fused on the left side surface to seal the opening so that the ink containing chamber 127 can contain ink. Similarly, the connecting passage 125 has a groove shape with an opening on the right side. Another film (the other film is not the film heat-fused on the ink containing chamber 127) is heat-fused thereon to hermetically close the opening; in this way, the connecting passage 125 serves as a flow passage through which ink can pass. That is, the ink tank 8 according to the present embodiment refers to a container in a state in which a film is heat-fused on a tank having the ink containing chamber 127 and the connecting passage 125.

[0033] The ink tank 8Y includes a buffer chamber that is communicated with the atmosphere and also serves as a storage chamber capable of accommodating ink overflowing from the ink storage chamber 127. For example, when the ink tank 8Y is turned over and changes position while the ink is contained in the ink storage chamber 127, ink may overflow from the ink storage chamber 127. In this case, each buffer chamber is configured to accommodate the overflowed ink. The ink tank 8Y includes a plurality of buffer chambers. All of the buffer chambers are designed to be located above the ink storage chamber 127 when the recording device 50 is in the use position.

[0034] The ink containing chamber 127 is communicated with the buffer chamber 131 through the opening 128. The buffer chamber 131 is communicated with the buffer chamber 133 through the flow passage 132. The buffer chamber 133 is communicated with the buffer chamber 135 through the flow passage 134. The buffer chamber 135 is communicated with the buffer chamber 137 through the flow passage 136. The buffer chamber 137 is communicated with the buffer chamber 139 through the flow passage 138. The buffer chamber 139 is communicated with the outside air through the air communication port 140.

[0035] The buffer chamber 131 opens in the direction opposite to the direction in which the ink containing chamber 127 opens. This opening of the buffer chamber 131 is formed by the film 203 (see Figure 3B ) is sealed, and the opening of the communication passage 125 is sealed by this film 203. On the other hand, the flow passage 132 opens in the same direction as the direction in which the ink accommodating chamber 127 opens. This opening of the flow passage 132 is sealed by the same film as the film that seals the opening of the ink accommodating chamber 127. That is, the buffer chamber 131 and the flow passage 132 are arranged so that their respective opening directions are opposite to each other.

[0036] The other buffer chambers 133, 135, 137, and 139 are opened in the same direction as the direction in which the ink accommodating chamber 127 is opened, and their openings are sealed by the same film as the film that seals the opening of the ink accommodating chamber 127. On the other hand, the flow passages 134, 136, and 138 are opened in the direction opposite to the direction in which the ink accommodating chamber 127 is opened, and their openings are sealed by the film 203 that seals the opening of the communication passage 125. That is, the buffer chambers 135, 137, and 139 are arranged so that their opening directions are opposite to the opening directions of the flow passages 134, 136, and 138, and each flow passage provides corresponding buffer-to-buffer communication.

[0037] Due to the above structure, when the ink tank 8Y is turned over with its left side (the side with the opening of the ink containing chamber 127) facing downward, its flow channels reach the upper position. That is, even if the ink is contained in the buffer chamber 133 in this state, the flow channel 134 is located above the surface height of the ink contained in the buffer chamber 133. This hinders the movement of the ink from the buffer chambers to the flow channels, thereby suppressing the ink from leaking to the outside from the ink tank 8Y. The structure described here is applicable not only to the ink tank 8Y, but also to the ink tank 8K, the ink tank 8C and the ink tank 8M.

[0038] FIG. 3 is a set of views for explaining a rib to which the film 203 is heat-fused in the ink tank 8Y. Figure 3A It is a right side view of the ink tank 8Y. The contour rib 201 is arranged on the right side surface of the ink tank 8Y, and the contour rib 201 defines the contour of the opening constituting the connecting channel 125, the buffer chamber 131 and the flow channels 134, 136, 138 and 141. In addition, ribs 202a and ribs 202b are arranged on the right side surface of the ink tank 8Y. Both ribs 202a and ribs 202b are arranged in a manner of protruding outward from the outer wall forming the ink containing chamber 127. In the present embodiment, both ribs 202a and ribs 202b have a linear shape extending along the Y direction. Ribs 202a and ribs 202b are spaced apart from each other along the Z direction. In the following description, ribs 202a and ribs 202b are sometimes collectively referred to as ribs 202.

[0039] Figure 3B 1 is a side view of the vicinity of the rib 202 when the ink tank 8Y is viewed from the downstream side in the Y direction. As described above, the film 203 is welded to the right side surface of the ink tank 8Y. Specifically, the film 203 is heat-welded to the contour rib 201 and the rib 202.

[0040] This joint seals the communication channel 125, the buffer chamber 131, and the flow channels 134, 136, 138, and 141 surrounded by the profile rib 201. Moreover, since the protruding heights of the profile rib 201 and the rib 202 are made uniform by the process of heat-melting the film 203, the right side surface of the ink tank 8Y joined to the film 203 is set to a flat surface without steps.

[0041] The fixing of each ink tank 8 to the recording apparatus 50 (housing 301) will be described below with reference to FIGS. 4 and 5. FIG. Figure 4A It is a perspective view of the ink tank 8K viewed from below. Figure 4B 8Y is a perspective view of the ink tank 8Y viewed from below. In the present embodiment, the ink tank 8Y is taken as an example because the structure of the ink tanks 8M and 8C is the same as that of the ink tank 8Y. However, the present disclosure can be applied to the case where the structure is different between different ink tanks. Figure 5 It is a perspective view of the housing 301 observed from above, and each ink tank 8 can be fixed on the housing 301.

[0042] The projection 8a, the projection 8b and the boss 8h are provided on the bottom surface of each ink tank 8. The rib 8e is provided on the ink tank 8K. The rib 8f (which can be engaged with the rib 8e) is formed on each of the ink tanks 8C, 8M and 8Y. The portion 8g to be fastened is also provided on the ink tank 8K.

[0043] A contact surface 301a that contacts and engages with the protrusion 8a, a contact surface 301b that contacts and engages with the protrusion 8b, and a hole 301c that engages with the boss 8h are provided in the housing 301. Their engagement restricts the movement of the corresponding ink tank 8 in the XY direction (horizontal direction) and the Z direction (gravity direction). With the above structure, each ink tank 8 can be temporarily fixed to the housing 301 only by attaching the ink tank to the housing 301 from above, thereby making the assembly work easier.

[0044] The restriction of the movement of each ink tank 8 along the Z direction will be described below with reference to FIG. 6 . Fig. 6A Each ink tank is 8 from Figure 5 The shown state is a perspective view of a state in which the camera is attached to the housing 301. Figure 6B is along Fig. 6A A cross-sectional view along line VIB-VIB.

[0045] When the ink tank 8 is attached to the housing 301, the user performs the attachment of the ink tank 8K for black ink after first performing the attachment of the ink tanks 8C, 8M, and 8Y for color inks. Since the attachment of the ink tank 8K is performed last, the ribs 8e are arranged above the ribs 8f, as shown in FIG. Figure 6B Therefore, the movement of the rib 8f of each of the ink tanks 8C, 8M and 8Y in the Z direction is restricted by the rib 8e of the ink tank 8K.

[0046] Furthermore, a fastening portion 301g corresponding to the portion 8g to be fastened of the ink tank 8k is formed on the housing 301 (see Figure 5 The portion 8g to be fastened is fastened to the fastening portion 301g using screws 25. Fig. 6A With the above structure, the movement of each ink tank 8 relative to the housing 301 along the Z direction can be restricted.

[0047] FIG. 7 is a set of views for explaining the positional relationship between the ink tank 8 attached to the housing 301 and the housing 301 . Fig. 7A It is a side view of the positional relationship between the ink tank 8 (in this embodiment, the ink tank 8Y) and the housing 301 as viewed from the downstream side in the Y direction. Figure 7B It is a perspective view of the shell 301 observed from the downstream side and from above along the Y direction, and the shell 301 is in a state where the ink tank 8 is not attached thereto.

[0048] The housing 301 includes a wall portion 301d facing the ink tank 8Y and a protruding portion 301e protruding from the wall portion 301d. Figure 7B As shown, the protruding portion 301e has a linear shape extending in the Z direction, and in this embodiment is formed as three protruding lines spaced apart from each other in the Y direction. The protruding portion 301e is provided at a position so that it faces the rib 202 of the ink tank 8Y, that is, at a lower position in the Z direction. Therefore, the protruding portion 301e is provided at a position where it does not face the profile rib 201.

[0049] That is, the distance 303 between the protruding portion 301e and the film 203 welded to the rib 202 is shorter than the distance 302 between the wall portion 301d and the film 203 welded to the profile rib 201. This structure makes it easier for the film 203 of the ink tank 8 to contact the protruding portion 301e than to contact the wall portion 301d when the ink tank 8 or the housing 301 moves due to, for example, an impact applied when transporting the recording device 50. Therefore, it is possible to prevent damage to the film 203 (which is welded to the profile rib 201 constituting each buffer chamber capable of accommodating ink and each flow channel), thereby suppressing leakage of liquid from the ink tank 8.

[0050] Furthermore, with the above-described structure, there is no need to provide a protective member between the film 203 (ink tank 8) and the housing 301. Therefore, compared with a case where a protective member is provided or a case where the ink tank 8 and the housing 301 are arranged with a sufficient spacing therebetween, it is possible to make the distance between the ink tank 8 and the housing 301 shorter, thereby reducing the size of the recording apparatus 50 with a simple and low-cost structure. Second embodiment

[0051] The second embodiment will be described below. The same structures as those of the first embodiment will not be described repeatedly. Fig. 8 is a view for explaining the structures of the ink tank 8 and the housing 301 according to the second embodiment. Fig. 8A 8Y is a right side view of the ink tank 8Y. In this embodiment, in addition to the ribs 202a and 202b of the first embodiment, ribs 202c and 202d are provided. The ribs 202c and 202d are provided at the upper portion of the ink tank 8Y. In the following description, the ribs 202a, 202b, 202c and 202d will also be collectively referred to as ribs 202.

[0052] Figure 8B 2 is a side view of the vicinity of the rib 202 when the ink tank 8Y is viewed from the downstream side in the Y direction. In the second embodiment, the protruding portion 301e of the housing 301 is also provided at a position corresponding to the ribs 202c and 202d. Since the rib 202 and the protruding portion 301e are also provided at positions different from those of the first embodiment described here, the effect of suppressing the leakage of the liquid from the ink tank 8 can be further improved. Third embodiment

[0053] FIG. 9 is a view for explaining the structure of the ink tank 8 and the housing 301 according to the third embodiment. Fig. 9A and 9B It is a right side view of ink tank 8Y. Fig. 9B It is indicated in Fig. 9A In the first embodiment, the structure in which the plurality of ribs 202 and the plurality of projections as the projecting portions 301e are provided has been described.

[0054] In this embodiment, a plurality of ribs 202 are provided (in Fig. 9A In the example, three ribs) are provided, and only a single protrusion is provided as the protruding portion 301e facing them (in Fig. 9A In the present embodiment, the rib 202 has a linear shape extending in the Z direction, and the protruding portion 301e has a linear shape extending in the Y direction. Since the rib 202 and the protruding portion 301e extend in directions orthogonal to each other, the same effect as the first embodiment can be produced without providing a plurality of protrusions.

[0055] Fig. 9B Shows the provision of a single rib 202 and the provision of multiple protrusions (in Fig. 9B , three protrusions) as the protruding portion 301e facing the rib (by Fig. 9B The dotted line in the figure shows the structure of Fig. 9B In the illustrated variation, the rib 202 has a linear shape extending in the Y direction, and the protruding portion 301e has a linear shape extending in the Z direction. Also in this variation, the same effects as those of the first embodiment can be expected.

[0056] Although the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A liquid ejection device, comprising: a tank, the tank comprising a tank container and a membrane, the tank container comprising a chamber, the chamber being configured to contain a liquid to be supplied to an injection head, the injection head being configured to inject the liquid, the chamber having an opening at a side of the tank container, the contour of the opening being surrounded by a first rib, the membrane sealing the opening; a wall arranged at a position facing the membrane and including a protruding portion protruding toward the membrane, wherein The protruding portion faces a second rib provided on the tank container, and The protruding portion does not face the first rib.

2. The liquid ejecting device according to claim 1, wherein: A plurality of protrusions as protruding portions are provided on the wall.

3. The liquid ejecting device according to claim 1, wherein: The protruding portion has a linear shape extending in the direction of gravity.

4. The liquid ejecting device according to claim 1, wherein: A plurality of second ribs are each provided on the tank container as a second rib.

5. The liquid ejecting device according to claim 1, wherein: The second rib has a linear shape extending in the horizontal direction.

6. The liquid ejecting device according to claim 1, wherein: The tank container further includes an outlet portion through which the liquid contained in the chamber is discharged, and a passage through which the chamber communicates with the outlet portion, and the passage has an opening in a direction opposite to the opening of the chamber, and The opening of the channel is sealed by a second membrane different from the membrane.

7. The liquid ejecting apparatus according to claim 1, wherein: An inlet is arranged on the tank container, and liquid is injected into the chamber through the inlet.

8. The liquid ejecting device according to claim 1, further comprising: A tube through which the liquid contained in the chamber is supplied to the ejection head.

9. The liquid ejecting device according to claim 1, wherein: The tank container further includes a second chamber having an opening in a direction opposite to the opening of the chamber and configured to contain air, the opening of the second chamber being sealed by a second film different from the film.

10. The liquid ejecting device according to claim 1, further comprising: The injection head.

11. A liquid tank for assembly in a liquid ejection device, the liquid ejection device comprising a wall having a protruding portion protruding from the wall, the liquid tank comprising: a tank container including a chamber configured to contain a liquid for supplying the liquid to an ejection head of a liquid ejection device, the chamber having an opening at a side of the tank container; a first rib, the first rib protruding outwardly from an outer wall of a wall forming the chamber, the first rib protruding from a side of the wall opposite to the chamber, wherein a contour of the opening is surrounded by the first rib; a second rib protruding outwardly from an outer wall of the wall forming the chamber, the second rib protruding from a side of the wall opposite the chamber; and a membrane that seals the opening and is engaged with the first rib and the second rib; Wherein, once the tank is assembled in the liquid ejection device, the gap between the first rib and the wall of the liquid ejection device is larger than the gap between the second rib and the protruding portion of the wall of the liquid ejection device.

12. The liquid tank according to claim 11, wherein: The plurality of second ribs are each provided on the tank container as a second rib.

13. The liquid tank according to claim 11, wherein: The or each second rib may have a linear shape extending in a horizontal direction when assembled.

14. The liquid tank according to claim 11, wherein: The tank container also includes an outlet portion and a channel, wherein the liquid contained in the chamber is discharged through the outlet portion, the chamber is connected to the outlet portion through the channel, and the channel has an opening in a direction opposite to the opening of the chamber, and the opening of the channel is sealed by a second membrane different from the membrane.

15. The liquid tank according to claim 11, wherein: The tank container further includes a second chamber having an opening in a direction opposite to the opening of the chamber and configured to contain air, the opening of the second chamber being sealed by a second film different from the film.

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