JP2018001444A - Liquid container and liquid injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that in a conventional liquid container, it is difficult to reduce the possibility of occurrence of liquid leakage.SOLUTION: A liquid container comprises: a first chamber surrounded by a plurality of walls and capable of containing liquid; a liquid infusion port for infusing the liquid into the first chamber, an atmosphere open port opened to the atmosphere; a liquid delivery port for delivering the liquid from the first chamber; an atmospheric air introduction port formed in a first wall that is different from the wall forming the top surface among the plurality of walls surrounding the first chamber; and an atmosphere communication passage that provides communication between the atmosphere open port and the atmospheric air introduction port. The atmospheric air introduction port is formed at a position separated from corners where the first wall and the other walls intersect with each other.SELECTED DRAWING: Figure 22

Description

  The present invention relates to a liquid container, a liquid ejecting apparatus, and the like.

  Conventionally, an ink jet printer is known as an example of a printer. In an inkjet printer, printing on a print medium can be performed by ejecting ink, which is an example of a liquid, from a print head onto a print medium such as print paper. Conventionally, such an ink jet printer is known to supply ink from a tank unit to an ejection head (for example, Patent Document 1).

JP-A-2015-131434

  The tank described in Patent Document 1 is an example of a liquid container and has a configuration in which a case made of synthetic resin and a flexible sheet member are joined. The case is provided with a wall that partitions an ink storage portion that can store ink, an air communication path that can introduce air into the ink storage portion, and the like. By bonding the sheet member to the wall, the ink containing portion and the atmosphere communication path are blocked by the sheet member. That is, the ink storage portion and the atmosphere communication path of the tank are partitioned by the wall provided in the case and the sheet member joined to the case. The sheet member can be regarded as one wall that partitions the ink storage portion. In the tank described above, the connecting portion between the ink containing portion and the atmosphere communication path overlaps with an intersecting portion (corner portion) of two walls that intersect each other among the walls that define the ink containing portion. In such a tank, the ink easily flows through the intersection of the two walls, so that the ink in the ink storage portion easily enters the atmosphere communication path. When this occurs, it is conceivable that the ink in the ink container leaks out of the tank through the atmosphere communication path. That is, in the conventional liquid container, it is difficult to reduce the possibility of liquid leakage.

  The present invention can solve at least a part of the problems described above, and can be realized as the following forms or application examples.

  [Application Example 1] A first chamber surrounded by a plurality of walls and capable of containing a liquid, a liquid inlet for injecting the liquid into the first chamber, an air opening opening to the atmosphere, A liquid outlet for discharging the liquid from the first chamber; an air inlet formed in a first wall different from a wall constituting the top surface of the plurality of walls surrounding the first chamber; and the atmosphere An atmosphere communication path that communicates between the opening and the atmosphere introduction port, and the atmosphere introduction port is formed at a position separated from a corner where the first wall and the other wall intersect. A liquid container characterized by that.

  In this liquid container, the air introduction port is formed at a position separated from the corner where the first wall and the other wall intersect. For this reason, it is difficult for the liquid moving along the corner where the first wall and the other wall meet in the first chamber to reach the air inlet. Thereby, the possibility that the liquid in the first chamber leaks out of the liquid container through the atmosphere communication path can be reduced.

  Application Example 2 In the above-described liquid container, a wall facing the first wall among the plurality of walls is formed of a film.

  In this liquid container, the first wall faces a wall made of a film. For this reason, since the air introduction port is separated from the film, it is possible to suppress the liquid that has traveled through the film from reaching the air introduction port.

  Application Example 3 In the above liquid container, the atmosphere communication path includes a second chamber, and the second chamber flows into the first chamber from the atmosphere opening port through the atmosphere introduction port. In this path, the liquid container is located upstream of the first chamber.

  In this liquid container, since the second chamber is located upstream from the first chamber, the liquid that has flowed out of the first chamber into the atmosphere communication path can be easily retained in the second chamber. Thereby, the possibility that the liquid in the first chamber leaks out of the liquid container via the atmosphere communication path can be further reduced.

  Application Example 4 In the liquid container described above, in the first chamber, at least a part of the outer periphery of the atmosphere introduction port in the first wall, and from the first wall to the opposite side in the first chamber. A liquid container, wherein a projecting convex portion is formed.

  In this liquid container, since the convex portion is formed around the atmosphere introduction port, the liquid in the first chamber is difficult to reach the atmosphere introduction port. Thereby, the possibility that the liquid in the first chamber leaks out of the liquid container via the atmosphere communication path can be further reduced.

  Application Example 5 In the above liquid container, the convex portion has a cylindrical shape surrounding the entire circumference of the atmosphere introduction port.

  In this liquid container, since the convex portion surrounds the entire circumference of the atmosphere introduction port, the liquid in the first chamber is more difficult to reach the atmosphere introduction port.

  Application Example 6 In the liquid container described above, the atmosphere communication path includes a communication channel connected to the atmosphere introduction port, the atmosphere introduction port has a circular shape, and has a diameter inside the atmosphere introduction port. Is the same as the width of the cross-sectional opening of the communication channel.

  In this liquid container, when the liquid in the first chamber enters the communication channel from the air inlet, the liquid that has entered the communication channel tends to return to the first chamber.

  Application Example 7 In the liquid container described above, the first wall in the first chamber further includes a first inner surface, and a second inner surface that protrudes inward of the first chamber from the first inner surface, A liquid container, wherein the air introduction port is opened on the second inner surface.

  In this liquid container, since the air introduction port is opened to the second inner surface that protrudes inward from the first inner surface in the first chamber, the liquid in the first chamber does not easily reach the atmosphere introduction port. Thereby, the possibility that the liquid in the first chamber leaks out of the liquid container via the atmosphere communication path can be further reduced.

  Application Example 8 In the above liquid container, the liquid outlet is formed on a side facing the first wall.

  In this liquid container, since the liquid in the first chamber flows toward the liquid outlet port located on the side facing the air inlet port, the possibility of liquid leaking from the air opening port through the air inlet port is reduced. Can do.

  Application Example 9 A liquid container according to the above-described liquid container, further including a second convex portion surrounding the atmosphere opening.

  In this liquid container, the liquid that has flowed out from the atmosphere opening port can be easily retained by the second projections by the second projection part surrounding the atmosphere opening port.

  Application Example 10 In the above liquid container, the plurality of walls include a visual recognition wall capable of visually confirming the liquid level in the first chamber, and the visual recognition wall is horizontal in the usage posture of the liquid container. An upper limit mark extending in a direction intersecting the direction is provided, and an upper limit mark indicating an upper limit of the amount of the liquid that can be injected into the first chamber is provided on the viewing wall. A liquid container, characterized in that it is also located above.

  In this liquid container, since the atmosphere introduction port is located above the upper limit mark, even if the liquid in the first chamber reaches the upper limit mark, the liquid in the first chamber hardly reaches the atmosphere introduction port. Thereby, the possibility that the liquid in the first chamber leaks out of the liquid container via the atmosphere communication path can be further reduced.

  Application Example 11 In the above liquid container, the plurality of walls include a visual recognition wall capable of visually confirming the liquid level in the first chamber, and the visual recognition wall is horizontal in the usage posture of the liquid container. An upper limit mark extending in a direction intersecting the direction is provided, and an upper limit mark indicating an upper limit of the amount of the liquid that can be injected into the first chamber is provided on the viewing wall, and the volume of the second chamber is A liquid container, wherein a liquid level in one room is equal to or larger than a volume of the liquid when the upper limit mark is reached.

  In this liquid container, even if the liquid in the first chamber flows out to the atmosphere communication path, the liquid in the first chamber can be received in the second chamber. For this reason, since the liquid that has flowed out of the first chamber into the atmosphere communication passage is easily retained in the second chamber, the possibility that the liquid in the first chamber leaks out of the liquid container through the atmosphere communication passage can be further reduced. it can.

  Application Example 12 In the above-described liquid container, the posture of the liquid container is directed downward with the viewing wall from the state in which the liquid in the first chamber reaches the upper limit mark in the use posture. The liquid container is characterized in that the air inlet is located above the liquid level of the liquid in the first chamber when the air inlet is changed.

  In this liquid container, even if the posture of the liquid container is changed from the state in which the liquid in the first chamber reaches the upper limit mark in the usage posture to the posture in which the viewing wall faces downward, the liquid in the first chamber is at the air inlet. Difficult to reach. Therefore, even if the posture of the liquid container is changed to a posture in which the viewing wall faces downward, it is possible to reduce the possibility that the liquid in the first chamber leaks out of the liquid container through the atmosphere communication path.

  Application Example 13 In the liquid container, the liquid inlet is provided on a second wall extending in a direction intersecting the first wall among the plurality of walls, and the liquid inlet and the air introduction A liquid container comprising a plate wall protruding from the second wall to the inside of the first chamber between the mouth and the mouth.

  In this liquid container, since the plate wall is provided between the liquid inlet and the air inlet, the scattered liquid adheres to the air inlet when the liquid is injected from the liquid inlet into the first chamber. Can be kept low.

  Application Example 14 A liquid ejecting head capable of ejecting liquid and a liquid container capable of supplying liquid to the liquid ejecting head, the liquid container being surrounded by a plurality of walls and capable of containing the liquid One chamber, a liquid inlet for injecting the liquid into the first chamber, an air opening for opening to the atmosphere, a liquid outlet for discharging the liquid from the first chamber, and the first chamber An air inlet formed in a first wall different from the wall constituting the top surface among the plurality of walls surrounding the atmosphere, and an air communication path communicating between the air opening and the air inlet, And the atmosphere introduction port is formed at a position separated from a corner where the first wall and the other wall intersect.

  In this liquid ejecting apparatus, in the liquid container capable of supplying the liquid to the liquid ejecting head, the air introduction port is formed at a position separated from the corner where the first wall and the other wall intersect. For this reason, it is difficult for the liquid moving along the corner where the first wall and the other wall meet in the first chamber to reach the air inlet. Thereby, the possibility that the liquid in the first chamber leaks out of the liquid container through the atmosphere communication path can be reduced.

FIG. 3 is a perspective view illustrating a main configuration of the printer according to the embodiment. FIG. 3 is a perspective view illustrating a main configuration of the printer according to the embodiment. FIG. 3 is a perspective view illustrating a main configuration of the printer according to the embodiment. The perspective view which shows the tank unit in this embodiment. FIG. 3 is a plan view illustrating a main configuration of the printer according to the embodiment. The perspective view which shows a part of tank unit in this embodiment. The perspective view which shows the cap in this embodiment. Sectional drawing in the AA in FIG. The figure when a part of tank unit in this embodiment is seen in the X-axis direction. The perspective view which shows a part of tank unit and the container for ink injection | pouring in this embodiment. The figure when a part of tank unit and the container for ink injection in this embodiment are seen in the X-axis direction. The perspective view which shows the tank in this embodiment. The perspective view which shows the tank in this embodiment. The perspective view which shows the tank in this embodiment. The disassembled perspective view which shows the tank in this embodiment. The disassembled perspective view which shows the tank in this embodiment. The figure which shows the external appearance of the case of the tank in this embodiment. The figure which shows the external appearance of the case of the tank in this embodiment. The figure which shows the external appearance of the tank in this embodiment. The figure which shows the external appearance of the tank in this embodiment. The figure which shows typically the flow path of the tank in this embodiment. The figure which shows the external appearance of the tank in this embodiment. Sectional drawing explaining the communicating port in the modification 1. FIG. Sectional drawing explaining the communicating port in the modification 2. FIG. Sectional drawing explaining the communicating port in the modification 3. FIG. Sectional drawing explaining the communicating port in the modification 4. FIG. The figure explaining the schematic structure of the tank in the modification 5. FIG. Sectional drawing explaining the cylinder wall of the tank in this embodiment. FIG. 3 is a plan view illustrating a main configuration of the printer according to the embodiment.

  Embodiments will be described with reference to the drawings. In addition, in each drawing, in order to make each structure the size which can be recognized, the structure and the scale of a member may differ.

  As shown in FIG. 1, the printer 1 according to the present embodiment includes a printing unit 3 that is an example of a liquid ejecting apparatus, a tank unit 4 provided on the side of the printing unit 3, and a scanner unit 5. ing. The printing unit 3 has a housing 6. The housing 6 constitutes the outer shell of the printing unit 3. Inside the housing 6, a mechanism unit (described later) of the printing unit 3 is accommodated. The tank unit 4 includes a housing 7 and a plurality (two or more than two) tanks 10. The plurality of tanks 10 are accommodated in the housing 7. For this reason, the plurality of tanks 10 are provided in the printing unit 3. In the present embodiment, four tanks 10 are provided. The housing 6, the housing 7, and the scanner unit 5 constitute an outer shell of the printer 1. As the printer 1, a configuration in which the scanner unit 5 is omitted can be adopted. The printer 1 can perform printing on a printing medium P such as printing paper with ink which is an example of a liquid. The print medium P is an example of a medium on which printing is performed. The tank 10 is an example of a liquid container.

  Here, in FIG. 1, XYZ axes, which are coordinate axes orthogonal to each other, are attached. The XYZ axes are also attached to the drawings shown thereafter as necessary. In this case, the XYZ axes in each figure correspond to the XYZ axes in FIG. FIG. 1 shows a state in which the printer 1 is arranged on the XY plane defined by the X axis and the Y axis. In the present embodiment, the state in which the printer 1 is arranged on the XY plane in a state where the XY plane coincides with the horizontal plane is the use state of the printer 1. The posture of the printer 1 when the printer 1 is arranged on the XY plane that is aligned with the horizontal plane is referred to as a usage posture of the printer 1.

  In the following, when the X-axis, Y-axis, and Z-axis are described in the drawings and descriptions showing the components and units of the printer 1, the components and units are incorporated (mounted) in the printer 1 Means the X-axis, Y-axis, and Z-axis. In addition, the posture of each component or unit in the usage posture of the printer 1 is referred to as the usage posture of the component or unit. In the following description, the printer 1 and its components, units, and the like will be described in their respective usage postures unless otherwise specified.

  The Z axis is an axis orthogonal to the XY plane. In the use state of the printer 1, the Z-axis direction is the vertical upward direction. When the printer 1 is in use, the −Z-axis direction is the vertically downward direction in FIG. In each of the XYZ axes, the direction of the arrow indicates the + (positive) direction, and the direction opposite to the direction of the arrow indicates the-(negative) direction. The four tanks 10 described above are arranged along the Y axis. For this reason, the Y-axis direction can also be defined as the direction in which the four tanks 10 are arranged.

  The printing unit 3 is provided with a paper discharge unit 21. In the printing unit 3, the print medium P is discharged from the paper discharge unit 21. In the printing unit 3, the surface on which the paper discharge unit 21 is provided is a front surface 22. The front surface 22 of the printing unit 3 and the front surface 22 of the scanner unit 5 are located in the same plane. That is, the front surface 22 of the printer 1 includes the front surface 22 of the printing unit 3 and the front surface 22 of the scanner unit 5.

  In the printer 1, a vertically upward surface of the scanner unit 5 is an upper surface 23. The tank unit 4 is provided on a side portion that faces the X-axis direction among the side portions that intersect the front surface 22 and the upper surface 23. The housing 7 is provided with a window portion 25. The window portion 25 is provided on the side surface 28 that intersects the front surface 26 and the upper surface 27 in the housing 7. Here, the front surface 26 of the tank unit 4 faces the same direction as the front surface 22 of the printer 1 (in the present embodiment, the Y-axis direction). The front surface 26 of the tank unit 4 is located in the same plane as the front surface 22 of the printer 1. That is, the front surface 26 of the tank unit 4 is located in the same plane as the front surface 22 of the printing unit 3. Thereby, in the external appearance of the printer 1, the unevenness | corrugation between the printing unit 3 and the tank unit 4 can be reduced, Therefore When it transfers the printer 1, it can make it hard to collide with the surrounding environment.

  In the tank unit 4, the window portion 25 is light transmissive. And the four tanks 10 mentioned above are provided in the position which overlaps with the window part 25. As shown in FIG. The tank 10 is provided with an ink containing portion 29. In the tank 10, the ink is stored in the ink storage unit 29. The window portion 25 is provided at a position overlapping the ink storage portion 29 in the tank 10. For this reason, the operator who uses the printer 1 can visually recognize the ink storage portions 29 of the four tanks 10 through the casing 7 through the window portion 25. In the present embodiment, the window portion 25 is provided as an opening formed in the housing 7. The operator can visually recognize the four tanks 10 through the window 25 that is an opening. In addition, the window part 25 is not limited to opening, For example, you may be comprised with the member which has a light transmittance.

  In the present embodiment, at least a part of the wall of the ink containing portion 29 facing the window portion 25 of each tank 10 is light transmissive. The ink in the ink containing portion 29 can be visually recognized from the light transmissive portion of each ink containing portion 29. Therefore, the operator can visually recognize the amount of ink in the ink containing portion 29 of each tank 10 by visually recognizing the four tanks 10 through the window portion 25. That is, in the tank 10, at least a part of the portion facing the window portion 25 can be used as a visual recognition portion that can visually recognize the amount of ink. Therefore, the operator can visually recognize the visual recognition parts of the four tanks 10 through the casing 7 through the window part 25. Note that all of the walls of the ink containing portion 29 may have light transmittance. Further, in the tank 10, all the portions facing the window portion 25 can be used as a visual recognition portion that can visually recognize the amount of ink.

  In the printer 1, the printing unit 3 and the scanner unit 5 are overlapped with each other. In a state where the printing unit 3 is used, the scanner unit 5 is positioned vertically above the printing unit 3. As shown in FIG. 2, the scanner unit 5 is a flat bed type, and includes a document cover 31 that rotates so as to be openable and closable, and a document placement surface 32 that is exposed when the document cover 31 is opened. Yes. In FIG. 2, a state in which the document cover 31 is opened is shown. The scanner unit 5 has an image sensor (not shown) such as an image sensor. The scanner unit 5 can read an image drawn on a document such as a sheet placed on the document placement surface 32 as image data via an image sensor. For this reason, the scanner unit 5 functions as an image reading device.

  As shown in FIG. 3, the scanner unit 5 is configured to be rotatable with respect to the printing unit 3. The scanner unit 5 also has a function as a lid of the printing unit 3. The operator can rotate the scanner unit 5 with respect to the printing unit 3 by lifting the scanner unit 5 in the Z-axis direction. Thereby, the scanner unit 5 that functions as a lid of the printing unit 3 can be opened with respect to the printing unit 3. FIG. 3 shows a state in which the scanner unit 5 is opened with respect to the printing unit 3.

  As shown in FIG. 3, the printing unit 3 has a mechanism unit 41. The mechanism unit 41 has a printing unit 42. In the printing unit 3, the printing unit 42 is accommodated in the housing 6. The printing unit 42 performs printing with ink on the print medium P transported in the Y-axis direction by a transport device (not shown). A transport device (not shown) intermittently transports the print medium P in the Y-axis direction. The printing unit 42 is configured to be capable of reciprocating along the X axis by a moving device (not shown). The tank unit 4 supplies ink to the printing unit 42. In the printer 1, at least a part of the tank unit 4 protrudes outside the housing 6. The printing unit 42 is housed in the housing 6. Thereby, the printing unit 42 can be protected by the housing 6.

  Here, the direction along the X-axis is not limited to a direction completely parallel to the X-axis, and includes directions inclined due to errors, tolerances, etc., except for a direction orthogonal to the X-axis. Similarly, the direction along the Y-axis is not limited to a direction completely parallel to the Y-axis, and includes directions inclined due to errors, tolerances, etc., except for a direction orthogonal to the Y-axis. The direction along the Z-axis is not limited to a direction completely parallel to the Z-axis, and includes directions inclined due to errors, tolerances, etc., except for a direction orthogonal to the Z-axis. In other words, the direction along any axis or plane is not limited to a direction completely parallel to any axis or plane, but may be due to errors, tolerances, etc., except for a direction perpendicular to any axis or plane. Including tilted direction.

  The tank unit 4 has a tank 10. In the present embodiment, the tank unit 4 has a plurality of (four in the present embodiment) tanks 10. The plurality of tanks 10 are located outside the casing 6 of the printing unit 3. The plurality of tanks 10 are accommodated in the housing 7. Thereby, the tank 10 can be protected by the housing 7. The housing 7 is located outside the housing 6. The housing 7 is fixed to the housing 6 with screws. That is, the tank unit 4 is fixed to the printing unit 3 with screws.

  In the present embodiment, the tank unit 4 has a plurality (four) of tanks 10. However, the number of tanks 10 is not limited to four, and three, less than three, and more than four may be employed.

  Furthermore, in this embodiment, the some tank 10 is comprised separately from each other. However, the configuration of the tank 10 which is an example of the liquid container is not limited to this. As a configuration of the liquid container, a configuration in which a plurality of tanks 10 are integrated to form one liquid container may be employed. In this case, a single liquid container is provided with a plurality of liquid containers. The plurality of liquid storage portions are individually partitioned from each other and configured to store different types of liquids. In this case, for example, different color inks can be individually stored in the plurality of liquid storage portions. As a method of integrating a plurality of tanks 10 into a single liquid container, there are a method in which a plurality of tanks 10 are joined or joined together, a method in which a plurality of tanks 10 are integrated by integral molding, and the like. Can be mentioned.

  As shown in FIG. 3, an ink supply tube 43 is connected to each tank 10. The ink in the tank 10 is supplied from the tank unit 4 to the printing unit 42 via the ink supply tube 43. The printing unit 42 is provided with a print head (not shown) that is an example of a liquid ejecting head. The print head has a nozzle opening (not shown) directed to the print medium P side. The print head is a so-called ink jet print head. The ink supplied from the tank unit 4 to the printing unit 42 via the ink supply tube 43 is supplied to the print head. Then, the ink supplied to the printing unit 42 is ejected as ink droplets toward the target print medium P from the nozzle opening of the print head.

  In the above example, the printing unit 3 and the tank unit 4 are illustrated as separate configurations. That is, in the above example, the housing 7 and the housing 6 are separate from each other. However, a configuration in which the housing 7 and the housing 6 are integrated may be employed. That is, the tank unit 4 can be included in the configuration of the printing unit 3. When the housing 7 and the housing 6 are integrated, it can be said that the plurality of tanks 10 are accommodated in the housing 6 together with the printing unit 42 and the ink supply tube 43.

  Further, the arrangement location of the tank 10 is not limited to the side portion side of the housing 6 in the X-axis direction. For example, the front side of the housing 6 in the Y-axis direction may be employed as the location where the tank 10 is disposed.

  In the printer 1 having the above-described configuration, ink droplets are ejected to the print head of the printing unit 42 at a predetermined position while the printing medium P is conveyed in the Y-axis direction and the printing unit 42 is reciprocated along the X-axis. By doing so, printing is performed on the print medium P.

  The ink is not limited to either water-based ink or oil-based ink. The water-based ink may be either an ink having a structure in which a solute such as a dye is dissolved in an aqueous solvent or an ink having a structure in which a dispersoid such as a pigment is dispersed in an aqueous dispersion medium. The oil-based ink may be either one having a configuration in which a solute such as a dye is dissolved in an oil-based solvent or one having a configuration in which a dispersoid such as a pigment is dispersed in an oil-based dispersion medium.

  In the tank unit 4, a mark 44 is added to the tank 10 as shown in FIG. 4. Moreover, the tank 10 has the injection | pouring part 45 and the visual recognition surface 46 which is an example of the visual recognition part mentioned above. In the tank 10, ink can be injected into the tank 10 from the outside of the tank 10 through the injection unit 45. The injection unit 45 communicates with the ink storage unit 29 of the tank 10. The injection part 45 includes a cylinder part 45A and an ink introduction port 45B. The cylinder portion 45 </ b> A has a cylindrical structure and protrudes upward from the tank 10. The ink introduction port 45B is an opening located at the upper end of the cylindrical portion 45A. The ink introduction port 45B opens upward. The operator can access the injection part 45 of the tank 10 from the outside of the casing 7 by opening the cover 47 of the casing 7. The cover 47 is configured to be rotatable to the main body 52A via a hinge. Note that the upper direction is not limited to the vertical upper direction, and includes a direction inclined with respect to the vertical direction except the horizontal direction. Similarly, the downward direction is not limited to the vertically downward direction, and includes directions inclined with respect to the vertical direction except for the horizontal direction.

  The viewing surface 46 faces the window portion 25. The operator can visually recognize the amount of ink in the ink containing portion 29 of each tank 10 by visually recognizing the visual recognition surface 46 of the tank 10 through the window portion 25. The amount of ink in each tank 10 is one piece of information regarding ink. The indicator 44 indicates information related to ink. In the present embodiment, the marker 44 is provided on the viewing surface 46 of the tank 10.

  Examples of the indicator 44 indicating information related to ink include an upper limit mark 48 and a lower limit mark 49. In the present embodiment, an upper limit mark 48 and a lower limit mark 49 are added to the viewing surface 46 of the tank 10. The operator can grasp the amount of ink in the tank 10 using the upper limit mark 48 and the lower limit mark 49 as marks. The upper limit mark 48 indicates a measure of the amount of ink that does not overflow from the injection portion 45 when ink is injected from the injection portion 45. The lower limit mark 49 indicates a measure of the amount of ink when prompting ink injection. A configuration in which at least one of the upper limit mark 48 and the lower limit mark 49 is provided in the tank 10 may be employed.

  Note that a scale or the like indicating the amount of ink in each tank 10 may be employed as the indicator 44 indicating information related to ink. A configuration in which a scale is added to the upper limit mark 48 and the lower limit mark 49, a configuration in which the upper limit mark 48 and the lower limit mark 49 are omitted, and only a scale is added may be employed. In addition, as the indicator 44 indicating the information regarding the ink, an indicator indicating the type of ink stored in each tank 10 may be employed. For example, an indicator 44 indicating the color of the ink can be cited as the type of ink. Examples of the indicator 44 indicating the ink color include “Bk” indicating black ink, “C” indicating cyan ink, “M” indicating magenta ink, and “Y” indicating yellow ink. Various signs 44, such as a character and a display by a color, are mentioned.

  As illustrated in FIG. 4, the housing 7 includes a first housing 51 and a second housing 52. The first housing 51 is located in the −Z axis direction with respect to the plurality of tanks 10. The second housing 52 is located in the Z-axis direction relative to the first housing 51 and covers the plurality of tanks 10 from the Z-axis direction of the first housing 51. The plurality of tanks 10 are covered with a first housing 51 and a second housing 52. The second housing 52 includes a main body 52 </ b> A and a cover 47. The main body 52 </ b> A covers at least a part of the portion excluding the injection portion 45 of the tank 10. The main body 52A is an example of a housing. The cover 47 is located at the end of the second housing 52 in the X-axis direction. The cover 47 constitutes a part of the side surface 28 facing in the X-axis direction. As shown in FIG. 4, the cover 47 is configured to be rotatable with respect to the main body 52 </ b> A of the second housing 52. A configuration in which the main body 52 </ b> A covers all parts of the tank 10 except for the injection part 45 can also be adopted.

  When the cover 47 is opened with respect to the main body 52A of the second housing 52, the injection portions 45 of the plurality of tanks 10 are exposed. Thereby, the operator can access the injection part 45 of the tank 10 from the outside of the housing 7. The ink inlet 45B is sealed with a cap 53. When ink is injected into the tank 10, the ink is injected after the cap 53 is removed from the injection portion 45 and the ink introduction port 45B is opened. In the printer 1, the ink introduction port 45 </ b> B faces upward from the horizontal direction in the usage posture.

  The cap 53 is provided for each ink inlet 45B. That is, in the present embodiment, the number of ink inlets 45B and the number of caps 53 are the same number (four in this embodiment). In the following description, when the four caps 53 are individually identified, the four caps 53 are referred to as a cap 53A, a cap 53B, a cap 53C, and a cap 53D, respectively. The cap 53 is detachable from the main body 52A, and is not an essential configuration in the printer 1 according to the present embodiment.

  Further, in the tank unit 4, a tray 54 is provided on the main body 52A. The cap 53 removed from the injection part 45 can be placed on the receiving tray 54. In the present embodiment, the tray 54 is provided for the purpose of placing the cap 53 removed from the injection portion 45 on the tray 54. A receiving tray 54 is provided for each ink inlet 45B. That is, in the present embodiment, the number of ink inlets 45B and the number of trays 54 are the same number (four in this embodiment). A plurality (four in this embodiment) of ink inlets 45B are arranged along the Y axis. A plurality (four in this embodiment) of trays 54 are also arranged along the Y axis.

  In the following, when the four trays 54 are individually identified, the four trays 54 are denoted as a tray 54A, a tray 54B, a tray 54C, and a tray 54D, respectively. In the following, when the four ink introduction ports 45B are individually identified, the four ink introduction ports 45B are respectively an ink introduction port 45B1, an ink introduction port 45B2, an ink introduction port 45B3, and an ink introduction port 45B4. It is written. Of the four ink inlets 45B, the ink inlet 45B1 is located most in the Y-axis direction. That is, the four ink introduction ports 45B are arranged in the order of the ink introduction port 45B4, the ink introduction port 45B3, the ink introduction port 45B2, and the ink introduction port 45B1 from the −Y-axis direction to the Y-axis direction.

  The tray 54A and the cap 53A are associated with the ink inlet 45B1. The tray 54B and the cap 53B are associated with the ink introduction port 45B2, the tray 54C and the cap 53C are associated with the ink introduction port 45B3, and the tray 54D and the cap 53D are associated with the ink introduction port 45B4.

  The main body 52A of the second housing 52 has a covering portion 71 as shown in FIG. The covering portion 71 is a portion covered with the cover 47 in a state where the cover 47 is closed with respect to the main body 52A. The covering portion 71 includes a wall 72 facing the X-axis direction and a wall 73 facing the direction intersecting the wall 72. The wall 72 is located in the −X axis direction with respect to the side surface 28. The wall 73 is located in the −Z-axis direction with respect to the upper surface 27 (FIG. 3). Four openings 74 are formed in the covering portion 71. Each of the four openings 74 is formed corresponding to the arrangement of the tank 10. The opening 74 is formed at a position over the wall 72 and the wall 73 across the intersection of the wall 72 and the wall 73. The injection part 45 of the tank 10 is exposed from the main body 52 </ b> A through the opening 74.

  Further, the covering portion 71 is provided with a recess 81. The recess 81 is provided in a direction that is recessed from the wall 72 in the −X axis direction. The recess 81 is provided for each ink inlet 45B. In the following description, when the four concave portions 81 are individually identified, the four concave portions 81 are referred to as a concave portion 81A, a concave portion 81B, a concave portion 81C, and a concave portion 81D, respectively. At this time, the concave portion 81A is associated with the ink inlet 45B1, the concave portion 81B is associated with the ink inlet 45B2, the concave portion 81C is associated with the ink inlet 45B3, and the concave portion 81D is associated with the ink inlet 45B4. . The recess 81 overlaps the ink inlet 45B and the tray 54 when the main body 52A is viewed from the front, that is, when the main body 52A is viewed in the −X-axis direction. In other words, when the main body 52 </ b> A is viewed from the front, the ink inlet 45 </ b> B and the tray 54 that are associated with each other are located in a region that overlaps the recess 81.

  Each recess 81 is provided with an inclined wall 82. For this reason, the main body 52 </ b> A having the four concave portions 81 is provided with four inclined walls 82. The inclined wall 82 is inclined with respect to the wall 72. In the present embodiment, the wall 72 extends along the YZ plane. For this reason, the inclined wall 82 is inclined with respect to the YZ plane. The inclined wall 82 is inclined in the direction toward the −X axis direction as it descends from above, that is, from the Z axis direction toward the −Z axis direction. In other words, the inclined wall 82 is inclined toward the inside of the housing 7 as it descends from above, that is, toward the printing unit 3 (FIG. 3) as it descends from above.

  In the following description, when the four inclined walls 82 are individually identified, the four inclined walls 82 are referred to as an inclined wall 82A, an inclined wall 82B, an inclined wall 82C, and an inclined wall 82D, respectively. At this time, the inclined wall 82A is associated with the ink introduction port 45B1, the inclined wall 82B is associated with the ink introduction port 45B2, the inclined wall 82C is associated with the ink introduction port 45B3, and the inclined wall 82D is associated with the ink introduction port 45B4. Is associated with. The wall 72 of the main body 52 </ b> A corresponds to the side wall having the inclined wall 82.

  When the printer 1 is viewed from the Z-axis direction in the usage posture of the printer 1, the tray 54 and the ink inlet 45 </ b> B are aligned in the first direction along one side 83 of the printer 1 as shown in FIG. 5. In the present embodiment, the first direction along one side 83 of the printer 1 corresponds to the Y-axis direction. Here, the four ink inlets 45B are located in the area of the printer 1 as shown in FIG. That is, the four ink inlets 45B are located in the −X axis direction from the one side 83 of the printer 1, that is, closer to the printing unit 3 than the one side 83.

  Then, as seen in FIG. 5, the direction of the main body 52 </ b> A in the second direction with respect to the side 83 is defined as a second direction that intersects the first direction along the side 83 and is directed from the side 83 toward the ink inlet 45 </ b> B. A wall 72 is located. In the present embodiment, the second direction that intersects the first direction along the one side 83 and faces the ink introduction port 45B from the one side 83 corresponds to the −X axis direction. Further, the side wall located in the second direction from the ink introduction port 45B corresponds to the wall 72 of the main body 52A.

  The main body 52A is provided with a connecting portion 84 as shown in FIG. A mooring portion (described later) provided on the cap 53 (FIG. 4) is connected to the connecting portion 84. The connecting portion 84 is provided for each ink inlet 45B. That is, in the present embodiment, four connection portions 84 are provided. In the following description, when the four connection portions 84 are individually identified, the four connection portions 84 are referred to as a connection portion 84A, a connection portion 84B, a connection portion 84C, and a connection portion 84D, respectively. At this time, the connection portion 84A is associated with the ink introduction port 45B1, the connection portion 84B is associated with the ink introduction port 45B2, the connection portion 84C is associated with the ink introduction port 45B3, and the connection portion 84D is associated with the ink introduction port 45B4. Is associated with.

  In the main body 52 </ b> A, the connection portion 84 is provided in the recess 81. The connecting portion 84 has a shape of a protrusion protruding from the recess 81 in the X-axis direction. In the present embodiment, the protruding amount of the connecting portion 84 in the X-axis direction is within the depth of the recessed portion 81. For this reason, the connecting portion 84 does not protrude beyond the depth of the recess 81. In the recess 81, the connection portion 84 is provided on the inclined wall 82. That is, in the present embodiment, the connecting portion 84 protrudes from the inclined wall 82 in the X-axis direction. Note that the inclined wall 82 is not limited to a flat surface, and a surface including unevenness or a curved surface may be employed.

  Here, the cap 53 is provided with a mooring portion 85 as shown in FIG. The cap 53 includes a covering portion 86, a seal portion 87, a skirt portion 88, and a grip portion 89, as shown in FIG. 8 which is a cross-sectional view taken along line AA in FIG. The cap 53 is made of a material which is rich in flexibility and elasticity and hardly allows liquid or gas to pass therethrough. Examples of the material constituting the cap 53 include rubber and elastomer.

  The covering portion 86 has a size and shape that can cover the ink inlet 45B from above. In the present embodiment, the covering portion 86 constitutes a plate-like portion that can cover the ink inlet 45B from above. The seal part 87 protrudes from the covering part 86. In the present embodiment, the seal portion 87 protrudes in a cylindrical shape from the covering portion 86, and the inside is configured to be hollow. The seal portion 87 can be inserted into the ink introduction port 45B, and closes the ink introduction port 45B while being inserted into the ink introduction port 45B. The seal portion 87 and the ink introduction port 45B are in an interference fit relationship. That is, when the seal portion 87 is press-fitted into the ink introduction port 45B, the ink introduction port 45B is closed. Thereby, when the ink inlet 45B is closed with the cap 53, the airtightness between the ink inlet 45B and the seal portion 87 is improved.

  In the following, the state where the ink introduction port 45B is closed by inserting the seal portion 87 into the ink introduction port 45B may be expressed as the state where the cap 53 is attached to the injection unit 45. In the following, when there is no particular notice, the state in which the cap 53 is attached to the injection portion 45 indicates a state in which the ink introduction port 45B is closed by inserting the seal portion 87 into the ink introduction port 45B. When the ink introduction port 45B is closed with the cap 53, the seal portion 87 is inserted into the ink introduction port 45B. Therefore, the ink in the tank 10 or the ink attached to the cylinder portion 45A may adhere to the seal portion 87. is there.

  The skirt portion 88 is located outside the seal portion 87 when the cover portion 86 is viewed from the seal portion 87 side, and protrudes from the cover portion 86. The direction in which the skirt portion 88 protrudes from the covering portion 86 is the same as the direction in which the seal portion 87 protrudes from the covering portion 86. The amount that the skirt portion 88 protrudes from the covering portion 86 is larger than the amount that the seal portion 87 protrudes from the covering portion 86. That is, the skirt portion 88 protrudes from the seal portion 87. For this reason, for example, even if the ink scatters from the seal portion 87 due to the momentum when the cap 53 having the ink adhered to the seal portion 87 is pulled out from the ink introduction port 45B, the scattered ink is easily captured by the skirt portion 88. Thereby, the convenience of the cap 53 can be improved.

  In the present embodiment, when the covering portion 86 is viewed from the seal portion 87 side, the skirt portion 88 is provided over a region surrounding the seal portion 87. However, the embodiment is not limited to the form in which the skirt portion 88 protrudes from the seal portion 87 over the entire circumference of the region surrounding the seal portion 87. A configuration in which the skirt portion 88 is partially cut may be employed. Even in such a configuration, an effect of reducing ink scattering can be obtained.

  When the seal portion 87 is inserted into the ink introduction port 45 </ b> B, the cylinder portion 45 </ b> A is positioned between the seal portion 87 and the skirt portion 88. In other words, when the seal portion 87 is inserted into the ink inlet 45 </ b> B, the cylinder portion 45 </ b> A is sandwiched between the seal portion 87 and the skirt portion 88. The skirt portion 88 and the cylinder portion 45A may be in an interference fit relationship or a clearance fit relationship. In other words, the setting may be such that the skirt portion 88 is press-fitted into the cylindrical portion 45A, or the gap between the skirt portion 88 and the cylindrical portion 45A may be set with the seal portion 87 inserted into the ink introduction port 45B.

  The grip part 89 is provided on the side opposite to the seal part 87 side of the covering part 86. The grip portion 89 protrudes from the covering portion 86 toward the side opposite to the seal portion 87 side. The operator can hold the grip portion 89 and attach / detach the cap 53 to / from the injection portion 45.

  The mooring portion 85 extends from the covering portion 86 in a bar shape. The mooring portion 85 extends from the covering portion 86 in a direction intersecting with the direction in which the seal portion 87 protrudes. A connected portion 91 is provided at the end of the mooring portion 85 opposite to the covering portion 86 side. The connected portion 91 protrudes from the mooring portion 85 in a cylindrical shape. In the present embodiment, the direction in which the connected portion 91 protrudes from the mooring portion 85 is the same as the direction in which the seal portion 87 protrudes from the covering portion 86. A recessed portion 92 is formed inside the connected portion 91 that protrudes in a cylindrical shape.

  By inserting the connecting portion 84 (FIG. 6) of the main body 52 </ b> A into the concave portion 92 of the connected portion 91, the mooring portion 85 is anchored to the connecting portion 84 of the main body 52 </ b> A. In the present embodiment, the concave portion 92 and the connection portion 84 are in an interference fit relationship. That is, when the connecting portion 84 is press-fitted into the recess 92, the connected portion 91 is connected to the connecting portion 84. Thereby, since the fixing force of the to-be-connected part 91 with respect to the connection part 84 can be heightened, when the anchoring part 85 is anchored to the connection part 84, the cap 53 cannot fall easily from the main body 52A.

  As described above, in the present embodiment, the connection portion 84 is provided on the inclined wall 82 in the recess 81. For this reason, when the mooring part 85 of the cap 53 is moored to the connection part 84, it can reduce that the mooring part 85 protrudes in the X-axis direction from the wall 72 of the main body 52A.

  In the present embodiment, the cap 53 can be attached to the injection portion 45 as shown in FIG. 4 with the mooring portion 85 anchored to the connection portion 84. Further, the cap 53 removed from the injection portion 45 can be placed on the receiving tray 54 while the mooring portion 85 is moored at the connection portion 84. That is, in the present embodiment, the mooring portion 85 associates the cap 53 with a length that allows the cap 53 to be attached to the injection portion 45 and the cap 53 that is removed from the injection portion 45 in a state where the mooring portion 85 is anchored to the connection portion 84. It has a length that can be placed on the received tray 54.

  In a state where the mooring portion 85 is moored to the connection portion 84, as shown in FIG. 9, one cap 53 can be placed only on the associated tray 54 among the four trays 54. Further, in a state where the mooring portion 85 is moored to the connection portion 84, one cap 53 can be attached only to the corresponding injection portion 45 among the four injection portions 45. That is, the movable range of the cap 53 in a state where the mooring portion 85 is moored to the connection portion 84 is a range between the associated ink introduction port 45B and the associated tray 54. One of the requirements for realizing this is that when the main body 52A is viewed from the front, that is, when the main body 52A is viewed in the −X-axis direction, the position P1 along the Y-axis direction of the connecting portion 84 is the position P2 and the position P3. It is between.

  This is because the position P1 along the first direction of the connecting portion 84 is the position P2 along the first direction of the tray 54 and the ink inlet 45B when the printer 1 is viewed from vertically above in the usage posture of the printer 1. This corresponds to being between the position P3 along the first direction. The position P <b> 2 is a position along the Y-axis direction of the tray 54 associated with the connection portion 84. The position P3 is a position along the Y-axis direction of the ink introduction port 45B associated with the connection portion 84. Here, the position P2 is the position of the end of the tray 54 in the -Y axis direction. The position P3 is the position of the end of the ink inlet 45B in the Y-axis direction. Thereby, when the printer 1 is viewed from vertically above in the usage posture of the printer 1, it is easy to align the distance from the connection portion 84 to the tray 54 and the distance from the connection portion 84 to the ink introduction port 45B. According to this requirement, the movable range of the cap 53 can be set to a range between the associated ink inlet 45B and the associated tray 54.

  Further, in the present embodiment, when the main body 52A is viewed from the front, that is, the main body 52A is viewed in the −X-axis direction, the position P1 along the Y-axis direction of the connecting portion 84 is between the position P4 and the position P5. is there. The position P4 is the center position of the tray 54 associated with the connecting portion 84. The position P5 is the center position of the ink inlet 45B. This is because when the printer 1 is viewed from vertically above in the usage posture of the printer 1, the position along the first direction of the connecting portion 84 is the center position along the first direction of the tray 54 and the first position of the ink inlet 45 </ b> B. This corresponds to being between the center position along one direction. Thereby, when the printer 1 is viewed from vertically above in the usage posture of the printer 1, the distance from the connection portion 84 to the tray 54 and the distance from the connection portion 84 to the ink inlet 45 </ b> B can be more easily aligned. According to this requirement, the length of the mooring portion 85 can be configured to be short while maintaining the movable range of the cap 53 within the range between the associated ink introduction port 45B and the associated tray 54. . Thereby, it is easy to reduce the slack of the mooring portion 85.

  In the present embodiment, as shown in FIG. 10, the ink stored in the ink injection container 94 can be injected into the tank 10. The ink injection container 94 is provided with a nozzle portion 95 that can discharge ink. The nozzle part 95 has a tubular structure. The ink in the ink injection container 94 is discharged out of the ink injection container 94 through the nozzle portion 95. The operator inserts the nozzle portion 95 of the ink injection container 94 into the ink introduction port 45B with the cap 53 removed from the injection portion 45, and then tanks the ink in the ink injection container 94 from the injection portion 45 to the tank. Inject into 10.

  Here, the ink injection container 94 is provided with a positioning portion 96 as shown in FIG. In the present embodiment, the positioning portion 96 is provided outside the tubular nozzle portion 95. The positioning portion 96 contacts the tip (outer end) of the ink introduction port 45B when the nozzle portion 95 is inserted into the ink introduction port 45B, and the degree of insertion of the nozzle portion 95 into the ink introduction port 45B (both nozzle insertion) Positioning). In the present embodiment, when the nozzle portion 95 is inserted into the ink introduction port 45B, the positioning portion 96 can come into contact with the tip (outer end) of the cylindrical portion 45A constituting the ink introduction port 45B. Accordingly, the position of the ink injection container 94 relative to the tank 10 when the nozzle portion 95 of the ink injection container 94 is inserted into the ink introduction port 45B is easily regulated.

  Thus, when the positioning portion 96 comes into contact with the tip of the cylindrical portion 45A constituting the ink introduction port 45B, there is a gap between the ink injection container 94 and the connection portion 84. Accordingly, it is easy to avoid contact with the connected portion 91 of the cap 53 connected to the connecting portion 84 when the positioning portion 96 of the ink injection container 94 is brought into contact with the ink introduction port 45B. As a result, when the ink is injected into the tank 10 by the ink injection container 94, it is easy to avoid the obstruction of the connected portion 91 and the connecting portion 84, so that the injection is easy.

  As illustrated in FIG. 12, the tank 10 includes a surface 101, a surface 102, a surface 103, a surface 104, a surface 105, a surface 106, and a surface 107. The surfaces 101 to 107 are surfaces facing outward in the tank 10. Further, as shown in FIG. 13, the tank 10 has a surface 108, a surface 109, a surface 110, a surface 111, a surface 112, a surface 113, a surface 114, and a surface 115. . Each of the surfaces 108 to 115 is a surface facing outward in the tank 10. Moreover, the tank 10 has the surface 116, as shown in FIG. The surface 116 is a surface facing outward in the tank 10.

  The surface 101 to the surface 116 constitute an outer shell of the tank 10. Each of the surfaces 101 to 116 is not limited to a flat surface. The surface 101 to the surface 116 may include unevenness, a step, a curved surface, and the like. In addition, protrusions may be formed on the surfaces 101 to 116.

  As shown in FIG. 12, the surface 101 is set to the visual recognition surface 46 described above. On the surface 101, an upper limit mark 48 and a lower limit mark 49, which are examples of the sign 44, are provided. The upper limit mark 48 and the lower limit mark 49 protrude from the surface 101 and are examples of the above-described protrusions. The surface 101 faces in the X axis direction. The surface 101 extends along the YZ plane.

  The surface 102 is located at a position in the Z-axis direction of the surface 101 and intersects the surface 101. The surface 102 is inclined with respect to the XY plane and the YZ plane. The surface 102 is inclined in the direction toward the Z axis direction from the surface 101 toward the −X axis direction. An injection portion 45 is provided on the surface 102. The injection part 45 is inclined in accordance with the inclination of the surface 102. For this reason, the cylindrical portion 45 </ b> A is also inclined in accordance with the inclination of the surface 102. The ink inlet 45B is also inclined in accordance with the inclination of the surface 102.

  In addition, a wall 121 is provided on the surface 102. The surrounding wall 121 is provided in a tubular shape outside the injection portion 45 and surrounds the injection portion 45 from the outside. The surrounding wall 121 protrudes upward from the surface 102. The surrounding wall 121 is also inclined in accordance with the inclination of the surface 102. For this reason, the surrounding wall 121 protrudes from the surface 102 in the same direction as the direction in which the cylindrical portion 45 </ b> A protrudes from the surface 102. The cylinder portion 45A and the surrounding wall 121 are also examples of protrusions.

  The surface 103 faces the X-axis direction and extends along the YZ plane. The surface 103 is located at a position in the Z-axis direction of the surface 102 and intersects the surface 102. Further, the surface 103 is located at a position in the −X axis direction with respect to the surface 101. The surface 104 is located at a position in the Z-axis direction of the surface 103 and intersects the surface 103. The surface 104 is inclined with respect to the XY plane and the YZ plane. The surface 104 is inclined in the direction toward the X axis direction from the surface 103 toward the Z axis direction.

  The surface 105 faces the X-axis direction and extends along the YZ plane. The surface 105 is located at a position in the Z-axis direction of the surface 104 and intersects the surface 104. Further, the surface 105 is located at a position in the X-axis direction from the surface 103 and is located at a position in the −X-axis direction from the surface 101. That is, when the tank 10 is viewed in the Y-axis direction, the surface 105 is located between the surface 101 and the surface 103. The surface 106 is located at a position in the −X axis direction of the surface 105, and intersects the surface 105 at a position in the Z axis direction rather than the surface 104. The surface 106 faces the Z-axis direction and extends along the XY plane.

  An air release portion 122 is provided on the surface 106. The air release part 122 protrudes from the surface 106 in the Z-axis direction. The atmosphere opening portion 122 is formed with an atmosphere opening 123 that opens in the Z-axis direction. A cylindrical wall 124 is provided on the surface 106. The cylinder wall 124 is provided in a cylindrical shape outside the atmosphere opening portion 122 and surrounds the atmosphere opening portion 122 from the outside. The cylindrical wall 124 protrudes from the surface 106 in the Z-axis direction. Further, a fixed portion 125 is provided on the surface 106. The fixed portion 125 protrudes from the surface 106 in the Z-axis direction. Note that the atmosphere opening portion 122, the cylindrical wall 124, and the fixed portion 125 are also examples of protrusions.

  The surface 107 is located at a position in the −Y-axis direction of the surfaces 101 to 106 and intersects the surfaces 101 to 106. The surface 107 faces the −Y axis direction and extends along the XZ plane.

  Note that the surface extending along the XZ plane is not limited to a surface extending completely parallel to the XZ plane, and includes surfaces inclined due to errors, tolerances, etc., except for a surface orthogonal to the XZ plane. Similarly, the surface extending along the YZ plane is not limited to a surface extending completely parallel to the YZ plane, and includes surfaces inclined due to errors, tolerances, etc., except for a surface orthogonal to the YZ plane. The surface extending along the XY plane is not limited to a surface extending completely parallel to the XY plane, and includes surfaces inclined due to errors, tolerances, etc., except for a surface orthogonal to the XY plane.

  Further, the fact that two surfaces intersect each other means that the two surfaces are not parallel to each other. In addition to the case where two surfaces are in direct contact with each other, there is also a case where the extension of one surface and the extension of the other surface intersect even in a positional relationship where they are not in direct contact with each other It is said to intersect. The angle formed by the two intersecting surfaces may be a right angle, an obtuse angle, or an acute angle.

  Of the faces facing outward in the tank 10, the face 108 faces downward as shown in FIG. 13. The surface 108 is inclined with respect to the XY plane and the YZ plane. The surface 108 is located at a position in the −Z-axis direction of the surface 101 (FIG. 12) and the surface 107, and intersects the surface 101 and the surface 107. The surface 108 is inclined in the direction toward the −Z axis direction from the Y axis direction toward the −Y axis direction. Further, the surface 108 is inclined in the direction toward the −Z axis direction from the X axis direction toward the −X axis direction.

  Legs 126 are provided on the surface 108 as shown in FIG. In the present embodiment, a plurality of leg portions 126 are provided. The leg 126 protrudes from the surface 108 in the −Z axis direction. The leg 126 is utilized for positioning and fixing when the tank 10 is disposed in the first housing 51 (FIG. 4). The leg part 126 is also an example of the protrusion mentioned above.

  As shown in FIG. 13, the surface 109 faces in the −X axis direction and extends along the YZ plane. The surface 109 is located at a position in the Z-axis direction of the surface 108 and intersects the surface 108. A protruding portion 127 is provided on the surface 109. The overhanging portion 127 is located at the end of the surface 109 in the −Y axis direction. The projecting portion 127 projects from the surface 109 in the −X axis direction. In the present embodiment, the overhanging portion 127 is provided over a region along the Z axis at the end portion in the −Y axis direction of the surface 109. The back surface of the overhanging portion 127, that is, the surface on the −Y-axis direction side of the overhanging portion 127 corresponds to the surface 107 shown in FIG.

  As shown in FIG. 13, the overhanging portion 127 faces the Y-axis direction and extends along the XZ plane. An ink supply unit 128 is provided at the end of the overhanging portion 127 in the −Z-axis direction. The ink supply unit 128 protrudes from the overhanging portion 127 in the Y-axis direction. An ink supply port 129 that opens in the Y-axis direction is formed in the ink supply unit 128. In the present embodiment, the ink supply tube 43 (FIG. 3) is connected to the ink supply unit 128. The ink in the tank 10 is supplied from the ink supply port 129 to the printing unit 42 (FIG. 3) via the ink supply tube 43. The ink supply port 129 corresponds to a liquid outlet port.

  Further, as shown in FIG. 13, a tube holding portion 131 and a rib 132 are provided on the surface 109. The tube holding part 131 protrudes from the surface 109 in the −X axis direction. The rib 132 also protrudes from the surface 109 in the −X axis direction. The tube holding part 131 and the rib 132 are also examples of the protrusions described above. The tube holding part 131 has an annular appearance and has a form in which a part is cut out. The tube holding part 131 is configured such that the ink supply tube 43 (FIG. 3) can be inserted. The ink supply tube 43 can be held by the tube holding part 131. Thereby, for example, when the printer 1 is assembled, the ink supply tube 43 can be fixed and piped easily.

  As shown in FIG. 13, the surface 110 faces the −Z-axis direction and extends along the XY plane. The surface 110 is located at a position in the Z-axis direction of the surface 109 and intersects the surface 109. The overhanging portion 127 is a series extending from the surface 109 to the surface 110. The surface 111 faces the −X axis direction and extends along the YZ plane. The surface 111 is located at a position in the Z-axis direction of the surface 110 and intersects the surface 110. Further, the surface 111 is located in the −X axis direction from the surface 109. The overhanging portion 127 is continuous from the surface 109 to the surface 110 and the surface 111. Ribs 133 are provided on the surface 111. The rib 133 protrudes from the surface 111 toward the −X axis direction. The rib 133 is also an example of the protrusion described above.

  The surface 112 faces the −X axis direction and extends along the YZ plane. The surface 112 is located at a position in the −Z-axis direction of the surface 106 illustrated in FIG. 12 and intersects the surface 106. As shown in FIG. 13, the surface 112 is positioned in the X-axis direction with respect to the surface 111, and is positioned in the −X-axis direction with respect to the surface 109.

  Here, in the tank 10, the surface 116 is located between the surface 111 and the surface 112 as shown in FIG. 14. The surface 116 faces the Z-axis direction and extends along the XY plane. The surface 116 is located at a position in the Z-axis direction of the surface 111 and is located at a position in the −Z-axis direction of the surface 112. The surface 116 intersects the surface 111 at the end of the surface 111 in the Z-axis direction, and intersects the surface 112 at the end of the surface 112 in the −Z-axis direction. The surface 112 intersects the surface 106 on the side opposite to the surface 116 side, that is, on the Z-axis direction side. The overhanging portion 127 extends from the surface 111 to the surface 106 through the surface 116 and the surface 112. As shown in FIG. 12, the overhanging portion 127 extends from the surface 106 to the surface 104 through the surface 105. In other words, the overhanging portion 127 continues from the surface 109 (FIG. 13) to the surface 104 through the surface 110, the surface 111, the surface 116 (FIG. 14), the surface 112, the surface 106, and the surface 105 (FIG. 12). It is extended.

  As shown in FIG. 13, the surface 113 faces the Y-axis direction and extends along the XZ plane. The surface 113 is located at a position in the Y-axis direction of the surface 108 and the surface 109, and intersects the surface 108 and the surface 109. The surface 114 faces the Y-axis direction and extends along the XZ plane. The surface 114 is located at a position in the Y-axis direction of the surface 109 and intersects the surface 109. Further, the surface 114 is located at a position in the Z-axis direction of the surface 113.

  The surface 115 faces the Y-axis direction and extends along the XZ plane. The surface 115 is located at the position of the surface 110, the surface 111, the surface 112, and the surface 116 (FIG. 14) in the Y-axis direction. The surface 115 intersects the surface 110, the surface 111, the surface 112, and the surface 116 (FIG. 14). As shown in FIG. 13, the surface 114 is located between the surface 113 and the surface 115. The surface 114 is located at a position in the −Y axis direction with respect to the surface 113 and the surface 115. Hereinafter, the surfaces 113 to 115 may be collectively referred to as the front surface 135. The front surface 135 is a surface facing the Y axis direction in the tank 10.

  As illustrated in FIG. 15, the tank 10 includes a case 137 and a sheet member 138 that is an example of a film. The case 137 is made of, for example, a synthetic resin such as nylon or polypropylene. The sheet member 138 is formed into a film shape with a synthetic resin (for example, nylon, polypropylene, etc.) and has flexibility. Note that the surface of the sheet member 138 that faces in the −Y-axis direction corresponds to the surface 107 (FIG. 12) of the tank 10.

  As shown in FIG. 15, the case 137 has a recess 141, a recess 142, a recess 143, a recess 144, a recess 145, a recess 146, a recess 147, a recess 148, and a recess 149. Has been. In the case 137, the concave portions 141 to 149 are formed in a direction that is concave in the Y-axis direction. In the case 137, the recesses 141 to 149 are open toward the -Y axis direction. The recessed portions 141 to 149 are partitioned from each other by a partition wall to be described later. The case 137 is provided with a joint 151. In FIG. 15, the joint 151 is hatched for easy understanding of the configuration. The joint portion 151 is provided at the end portion on the −Y-axis direction side of the partition wall that divides each of the concave portions 141 to 149.

  The sheet member 138 has a size and shape that covers the recesses 141 to 149. The sheet member 138 is joined to the joining portion 151. In this embodiment, the case 137 and the sheet member 138 are joined by welding. When the sheet member 138 is joined to the case 137, each of the recesses 141 to 149 is closed by the sheet member 138. A space surrounded by the concave portion 141 and the sheet member 138 is configured as the ink containing portion 29. As described above, in the tank 10, ink is stored in the ink storage portion 29.

  Moreover, the tank 10 has the waterproof ventilation film 152 and the sheet | seat member 153, as shown in FIG. The waterproof breathable film 152 is made of a material having a high waterproof property against liquid, that is, a low liquid permeability and a high breathability, and is formed in a film shape. The waterproof ventilation film 152 is an example of a waterproof ventilation member. The sheet member 153 is formed into a film shape with a synthetic resin (for example, nylon, polypropylene, etc.) and has flexibility. In the tank 10, the surface of the sheet member 153 facing the Y-axis direction corresponds to the surface 115 (FIG. 13) of the tank 10.

  As shown in FIG. 16, the case 137 has a recess 154, a recess 155, a recess 156, a recess 157, and a recess 158. In the case 137, the recesses 154 to 158 are formed in a direction that is recessed in the −Y axis direction. In the case 137, the recesses 154 to 158 open toward the Y-axis direction. The recess 154 is formed inside the recess 155. Of the recesses 154 to 158, the recesses 155 to 158 are partitioned from each other by a partition wall 161. The recess 154 is partitioned from the recess 155 by the partition wall 162.

  The partition wall 161 and the partition wall 162 are provided in a bank shape on the surface 114. The partition wall 161 and the partition wall 162 protrude from the surface 114 in the Y-axis direction. In the tank 10, recesses 155 to 158 are formed by bank-shaped partition walls 161 protruding from the surface 114 in the Y-axis direction. Further, in the tank 10, a recess 154 is formed by a bank-shaped partition wall 162 projecting from the surface 114 in the Y-axis direction. That is, the recesses 155 to 158 have a configuration in which the surface 114 is the bottom surface and the bottom surface is surrounded by the partition wall 161. The recess 154 has a configuration in which the surface 114 is the bottom surface and the bottom surface is surrounded by the partition wall 162. Note that the partition wall 161 also projects in the Y-axis direction from the partition wall 162. For this reason, the recess 154 is accommodated in the recess 155.

  The ends of the partition wall 161 and the partition wall 162 on the Y axis direction side are set as joints 163. The waterproof breathable film 152 has a size and shape that covers the recess 154 and the partition wall 162. The waterproof breathable film 152 is joined to the joining portion 163 of the partition wall 162. Thereby, the recess 154 is closed by the waterproof breathable film 152. The sheet member 153 has a size and shape that covers the recesses 155 to 158 and the partition wall 161. The sheet member 153 is joined to the joining portion 163 of the partition wall 161. Thereby, the recesses 155 to 158 are closed by the sheet member 153. In the present embodiment, the waterproof breathable film 152 and the sheet member 153 are each joined to the joining portion 163 by welding.

  As shown in FIG. 17, the case 137 includes a partition wall 171, a partition wall 172, a partition wall 173, a partition wall 174, a partition wall 175, and a partition wall 176. The partition wall 171 to the partition wall 176 define the recess 141. Further, the case 137 includes a partition 177, a partition 178, a partition 179, a partition 180, a partition 181, a partition 182, a partition 183, a partition 184, a partition 185, a partition 186, a partition 187, A partition 188 and a partition 189 are provided.

  Here, as described above, the space surrounded by the concave portion 141 and the sheet member 138 is configured as the ink containing portion 29. The recess 141 is partitioned by partition walls 171 to 176. The ink containing portion 29 is configured by closing the concave portion 141 defined by the partition walls 171 to 176 with the sheet member 138. For this reason, the partition 171 to the partition 176 and the sheet member 138 can be defined as walls that partition the ink containing portion 29 that is an example of the first chamber. The ink containing portion 29 is surrounded by the partition walls 171 to 176 and a plurality of walls of the sheet member 138. Of the plurality of walls of the partition walls 171 to 176 and the sheet member 138, the partition wall 171 corresponds to the first wall. Moreover, the sheet member 138 which is an example of a film corresponds to a wall facing the first wall. Of the plurality of walls of the partition walls 171 to 176 and the sheet member 138, the partition wall 172 corresponds to the visual recognition wall. Further, the surface of the partition wall 176 on the concave portion 141 side corresponds to the top surface.

  The partition wall 171 and the partition walls 176 to 179 define the recess 142. The partition wall 171, the partition wall 176, the partition wall 177, the partition wall 179, and the partition wall 180 define the recess 143. The partition wall 171, the partition wall 177, the partition wall 181, the partition wall 182, and the partition wall 183 define the recess 144. The partition wall 171, the partition wall 181, the partition wall 185, the partition wall 187, and the partition wall 188 define the recess 145. The partition wall 171, the partition wall 185, the partition wall 186, the partition wall 187, and the partition wall 188 define the recess 146. The partition wall 171, the partition wall 181, the partition wall 184, the partition wall 186, the partition wall 187, the partition wall 188, and the partition wall 189 define the recess 147.

  The partition wall 171 extends along the XZ plane. The surface on the Y-axis direction side of the partition wall 171 corresponds to the surface 113 and the surface 114 shown in FIG. As illustrated in FIG. 17, the partition walls 172 to 176 intersect the partition wall 171. The partition walls 172 to 176 protrude from the partition wall 171 in the −Y axis direction.

  The partition 172 is located at the end of the partition 171 on the X-axis direction side and extends along the YZ plane. The surface of the partition wall 172 opposite to the concave portion 141 side, that is, the surface of the partition wall 172 on the X-axis direction side corresponds to the surface 101 shown in FIG. As described above, the surface 101 is set to the viewing surface 46. For this reason, the ink in the recessed part 141 can be visually recognized through the partition 172. The partition wall 172 is an example of a visual recognition wall. As illustrated in FIG. 17, the partition wall 173 is provided at a position facing the partition wall 172 with the recess 141 interposed therebetween. The partition wall 173 extends along the YZ plane. A surface of the partition wall 173 opposite to the concave portion 141 side, that is, a surface of the partition wall 173 on the −X axis direction side corresponds to the surface 109 illustrated in FIG. 13.

  As shown in FIG. 17, the partition 174 is located at the end of the partition 171 on the −Z axis direction side. A surface of the partition 174 opposite to the concave portion 141 side, that is, a surface of the partition 174 on the −Z-axis direction side corresponds to the surface 108 illustrated in FIG. 13. The partition 174 is inclined with respect to the XZ plane. The partition wall 174 is also inclined with respect to both the XY plane and the YZ plane.

  As shown in FIG. 17, the partition wall 175 is provided at a position opposite to the partition wall 174 across the recess 141. The partition wall 176 is also provided at a position opposite to the partition wall 174 with the recess 141 interposed therebetween. The partition wall 175 is located at the position of the partition wall 176 in the X-axis direction. The partition wall 175 is inclined with respect to both the XY plane and the YZ plane. The partition 175 is orthogonal to the XZ plane. The partition 176 extends along the XY plane. The surface of the partition 175 opposite to the concave portion 141 side, that is, the surface of the partition 175 on the Z-axis direction side corresponds to the surface 102 shown in FIG.

  The surface 102 is provided with the injection portion 45 described above. That is, the injection part 45 is provided in the partition wall 175. The cylindrical portion 45A of the injection portion 45 is provided on the surface 102 of the partition wall 175, and protrudes from the surface 102 toward the side opposite to the concave portion 141 side. An ink introduction port 45B is opened at the upper end of the cylinder portion 45A opposite to the surface 102 side. On the other hand, an ink injection port 45C is opened at a surface of the partition wall 175 opposite to the surface 102, that is, at an intersecting portion where the surface of the partition wall 175 on the concave portion 141 side intersects the cylindrical portion 45A. The ink injection port 45 </ b> C is an opening that opens toward the concave portion 141 in the partition wall 175 in the injection portion 45. The ink injected from the ink introduction port 45B flows from the ink injection port 45C into the concave portion 141 (ink storage unit 29) through the cylindrical portion 45A. The ink injection port 45C corresponds to a liquid injection port.

  The partition wall 172 intersects the partition wall 175 at the end in the Z-axis direction. The partition wall 172 intersects the partition wall 174 at the end in the −Z axis direction. The partition wall 173 intersects the partition wall 176 at the end in the Z-axis direction. The partition wall 173 intersects the partition wall 174 at the end in the −Z axis direction. The partition wall 175 intersects the partition wall 176 at the end in the −X axis direction. With the above structure, the partition walls 172 to 176 surround a part of the partition wall 171. Thereby, the recessed part 141 which makes the partition 171 the bottom is comprised.

  The partition wall 177 that defines the recess 142 is provided at a position opposite to the partition wall 176 with respect to the recess 142, that is, at a position in the Z-axis direction relative to the partition wall 176. The partition wall 177 extends along the XY plane. The partition wall 178 is located at the position in the X-axis direction of the recess 142 and extends along the YZ plane. The surface of the partition wall 178 opposite to the concave portion 142 side, that is, the surface of the partition wall 178 on the X-axis direction side corresponds to the surface 103 shown in FIG. As illustrated in FIG. 17, the partition 179 is provided at a position on the opposite side of the partition 178 with respect to the recess 142, that is, at a position in the −X axis direction with respect to the partition 178. The partition wall 179 extends along the YZ plane.

  The partition 178 intersects the partition 176 at the end in the −Z axis direction. The partition 178 intersects the partition 177 at the end in the Z-axis direction. The partition 179 intersects the partition 176 at the end in the −Z axis direction. The partition 178 intersects the partition 177 at the end in the Z-axis direction. With the above structure, the partition walls 176 to 179 surround a part of the partition wall 171. Thereby, the recessed part 142 which makes the partition 171 the bottom is comprised. The recess 142 is located on the Z-axis direction side of the recess 141.

  The partition wall 180 that defines the recess 143 is provided at a position on the opposite side of the partition wall 179 across the recess 143, that is, at a position in the −X axis direction relative to the partition wall 179. The partition wall 180 extends along the YZ plane. A surface of the partition wall 180 opposite to the concave portion 143 side, that is, a surface of the partition wall 180 on the −X axis direction side corresponds to the surface 111 illustrated in FIG. 13. As shown in FIG. 17, the partition 176 and the partition 177 reach the partition 180 from the position in the X-axis direction across the partition 179 in the −X-axis direction from the partition 179. The partition wall 180 intersects the partition wall 176 at the end in the −Z-axis direction. The partition wall 180 intersects the partition wall 177 at the end in the Z-axis direction.

  With the above structure, the partition wall 176, the partition wall 177, the partition wall 179, and the partition wall 180 surround a part of the partition wall 171. Thereby, the recessed part 143 which makes the partition 171 the bottom is comprised. The recess 143 is located on the −X axis direction side of the recess 142 with the partition wall 179 interposed therebetween. That is, the recess 142 and the recess 143 share the partition wall 179. The recess 142 and the recess 143 also share the partition wall 176 and the partition wall 177. The recess 143 is located on the Z axis direction side with respect to the recess 141.

  The partition wall 181 that defines the recess 144 is provided at a position opposite to the partition wall 177 across the recess 144, that is, at a position in the Z-axis direction relative to the partition wall 177. The partition wall 181 extends along the XY plane. The partition wall 182 is located at the position of the recess 144 in the X-axis direction. The partition 182 is inclined with respect to both the XY plane and the YZ plane. The partition 182 is orthogonal to the XZ plane. The surface of the partition wall 182 opposite to the concave portion 144 side, that is, the surface of the partition wall 182 on the X-axis direction side corresponds to the surface 104 shown in FIG. As illustrated in FIG. 17, the partition wall 183 is located at the position of the recess 144 in the −X axis direction. The partition wall 183 extends along the YZ plane.

  With the above structure, the partition wall 177, the partition wall 181, the partition wall 182, and the partition wall 183 surround a part of the partition wall 171. Thereby, the recessed part 144 which uses the partition 171 as a bottom part is comprised. The recess 144 is located on the Z-axis direction side of the recess 142 and the recess 143 with the partition wall 177 interposed therebetween. That is, the recess 142, the recess 143, and the recess 144 share the partition wall 177.

  The partition wall 185 that partitions the recess 145 is provided at a position opposite to the partition wall 181 across the recess 145, that is, at a position in the Z-axis direction relative to the partition wall 181. The partition wall 185 extends along the XY plane. The partition wall 188 is located at the position in the X-axis direction of the recess 145 and extends along the YZ plane. The partition 188 extends from the partition 181 beyond the partition 185 in the Z-axis direction. The surface of the partition 188 opposite to the concave portion 145, that is, the surface of the partition 188 on the X-axis direction side corresponds to the surface 105 shown in FIG. As shown in FIG. 17, the partition wall 187 is provided at a position opposite to the partition wall 188 across the recess 145, that is, at a position in the −X axis direction from the partition wall 188. The partition wall 187 extends along the YZ plane. The partition 187 extends from the partition 181 beyond the partition 185 in the Z-axis direction.

  The partition 185 intersects the partition 188 at the end in the X-axis direction. The partition wall 185 intersects the partition wall 187 at the end in the −X axis direction. The partition wall 187 intersects the partition wall 181 at the end in the −Z axis direction. The partition wall 181 intersects the partition wall 188 at the end in the X-axis direction. With the above structure, the partition 181, the partition 185, the partition 187, and the partition 188 surround a part of the partition 171. Thereby, the recessed part 145 which makes the partition 171 the bottom is comprised. The recess 145 is located on the Z axis direction side of the recess 144.

  The partition wall 186 that defines the recess 146 is provided at a position opposite to the partition wall 185 across the recess 146, that is, at a position in the Z-axis direction relative to the partition wall 185. The partition wall 186 extends along the XY plane. The partition 187 reaches the partition 186 from the partition 181 across the partition 185 in the Z-axis direction. The partition 186 intersects the partition 188 at the end in the X-axis direction. The partition 186 intersects the partition 187 at the end in the −X axis direction. With the above structure, the partition 185, the partition 186, the partition 187, and the partition 188 surround a part of the partition 171. Thereby, the recessed part 146 which makes the partition 171 the bottom is comprised. The recess 146 is located on the Z-axis direction side of the recess 145 with the partition wall 185 interposed therebetween. That is, the recess 145 and the recess 146 share the partition 185. The recess 145 and the recess 146 also share the partition 188 and the partition 187.

  The partition wall 189 that defines the recess 147 is provided at a position opposite to the partition wall 181 across the recess 147, that is, at a position in the Z-axis direction relative to the partition wall 181. The partition wall 189 is located in the Z-axis direction with respect to the recess 145 and the recess 146. That is, the partition 189 is located in the Z-axis direction with respect to the partition 186. The partition wall 189 extends along the XY plane. The surface of the partition wall 189 opposite to the concave portion 147 side, that is, the surface of the partition wall 189 on the Z-axis direction side corresponds to the surface 106 shown in FIG. As shown in FIG. 17, the partition 184 is located at the position in the −X axis direction of the recess 147 and extends along the YZ plane. A surface of the partition 184 opposite to the concave portion 147 side, that is, a surface on the −X axis direction side of the partition 184 corresponds to the surface 112 illustrated in FIG. 13.

  The partition 184 intersects the partition 181 at the end in the −Z axis direction. The partition 184 intersects the partition 189 at the end in the Z-axis direction. The partition wall 189 intersects the partition wall 188 at the end in the X-axis direction. With the above structure, the partition 181, the partition 187, the partition 186, the partition 188, the partition 189, and the partition 184 surround a part of the partition 171. Thereby, the recessed part 147 which makes the partition 171 the bottom is comprised. The recess 147 is located on the Z-axis direction side of the recess 144. Note that the recess 145 and the recess 146 are surrounded by a partition 181, a partition 188, a partition 189, and a partition 184, as shown in FIG. For this reason, the concave portion 145 and the concave portion 146 can be regarded as being located in the concave portion 147.

  The recess 148 and the recess 149 are provided in the overhanging portion 127. As shown in FIG. 17, the recesses 148 and 149 are located outside the recesses 141 to 147 when the case 137 is viewed in the Y-axis direction. The concave portion 148 and the concave portion 149 are provided in a groove shape in the overhanging portion 127.

  The recess 148 is partitioned from the recess 143 by a partition wall 180 and a partition wall 176. The recess 148 is partitioned from the recess 141 by a partition wall 173. The concave portion 148 is connected to the concave portion 144 at a portion intersecting the partition wall 177. That is, the concave portion 148 is connected to the concave portion 144 at the connection portion 201 that opens toward the inside of the concave portion 144 at a portion that intersects the partition wall 177.

  The recess 148 extends from the connecting portion 201 along the partition wall 180 in the −Z-axis direction, rotates at a portion where the partition wall 180 and the partition wall 176 intersect, and extends along the partition wall 176 in the X-axis direction. Yes. The connection portion 201 rotates and extends in the −Z axis direction before reaching the partition wall 173, and further rotates in the Z axis direction and extends in the Z axis direction along the partition wall 173. The recess 148 intersects the partition wall 176 and is connected to the recess 143. That is, the concave portion 148 is connected to the concave portion 143 at the connection portion 202 that opens toward the inside of the concave portion 143 at a portion that intersects the partition wall 176.

  The concave portion 148 is connected to the concave portion 144 at the connecting portion 201 and is connected to the concave portion 143 at the connecting portion 202. Therefore, the recess 144 and the recess 143 are connected via the recess 148.

  As shown in FIG. 17, the recess 149 is located outside the recess 147 when the case 137 is viewed in the Y-axis direction. The recess 149 is partitioned from the recess 147 by a partition wall 184, a partition wall 189, and a partition wall 188. Further, the recess 149 is partitioned from the recess 145 and the recess 146 by a partition wall 188.

  The recess 149 is connected to the recess 147 at a portion where the partition 184 and the partition 181 intersect. The concave portion 149 is connected to the concave portion 147 at a connection portion 203 that opens toward the inside of the concave portion 147 in a portion of the partition wall 184 that intersects the partition wall 181. The recess 149 extends from the connecting portion 203 along the partition 184 in the Z-axis direction, turns around the partition 184 and the partition 189, and extends along the partition 189 in the X-axis direction. .

  The recess 149 rotates at a portion where the partition 189 and the partition 188 intersect, extends in the −Z-axis direction along the partition 188, and is connected to the recess 144 at a portion where the partition 188 and the partition 177 intersect. ing. That is, the concave portion 149 is connected to the concave portion 144 at the connection portion 204 that opens toward the inside of the concave portion 144 at a portion of the partition wall 188 that intersects the partition wall 177. The concave portion 149 is connected to the concave portion 147 at the connecting portion 203 and is connected to the concave portion 144 at the connecting portion 204. Therefore, the recess 144 and the recess 147 are connected via the recess 149.

  With the above configuration, the recess 147 and the recess 143 are connected via the recess 149, the recess 144, and the recess 148. Further, the recess 145 and the recess 146 are connected via a notch 205 formed in the partition 185.

  Note that the concave portion 154, the concave portion 155, and the concave portion 156 shown in FIG. 16 are provided in a region opposite to the concave portion 145, the concave portion 146, and the concave portion 147 in the partition wall 171 shown in FIG. That is, the recess 154, the recess 155, and the recess 156 illustrated in FIG. 16 are provided in regions overlapping the recess 145, the recess 146, and the recess 147 with the partition wall 171 illustrated in FIG.

  Here, as shown in FIG. 17, the partition wall 171 is provided with a communication hole 211, a communication hole 212, a communication hole 213, a communication hole 214, a communication hole 215, a communication hole 216, and a communication hole 217. It has been. The communication hole 211 is provided in the recess 146. The communication hole 212 is provided in the recess 145. The communication hole 213 is provided in the recess 147. The communication hole 214 is provided in the recess 143. The communication hole 215 and the communication hole 216 are provided in the recess 142. The communication hole 217 is provided in the recess 141. The communication holes 211 to 217 pass through the partition wall 171.

  As shown in FIG. 18, the communication hole 211 in the recess 146 passes through the partition wall 171 and communicates with the recess 154. Here, the partition wall 189 is formed with a communication port 218 communicating with the atmosphere opening port 123. The communication port 218 is an opening that opens at the intersection of the partition wall 189 where the atmosphere opening portion 122 intersects. The communication port 218 opens toward the inside of the recess 155. The partition 189 is shared by the recess 155 and the recess 147 shown in FIG. The recess 147 and the recess 155 are partitioned by a partition wall 219 protruding into the recess 147. In addition, the recessed part 155 is connected to the recessed part 154 through the waterproof ventilation film 152, as shown in FIG.

  The recess 154 communicates with the recess 146 shown in FIG. 17 through the communication hole 211. The communication hole 212 in the recess 145 communicates with the recess 156 as shown in FIG. A communication hole 213 also communicates with the recess 156. That is, the communication hole 212 communicates with the recess 147 shown in FIG. 17 via the recess 156 and the communication hole 213. The communication hole 214 in the recess 143 communicates with the recess 158 as shown in FIG.

  A communication hole 215 also communicates with the recess 158. That is, the communication hole 214 communicates with the recess 142 shown in FIG. 17 via the recess 158 and the communication hole 215. A communication hole 216 communicates with the recess 142. As shown in FIG. 18, the communication hole 216 communicates with the recess 157. The recess 157 communicates with the recess 141 shown in FIG. 17 through the communication hole 217.

  A recess 221 is provided on the −X axis direction side of the recess 141 and on the −Z axis direction side of the recess 148. The recess 221 is connected to the recess 141 at a portion of the partition wall 173 that intersects the partition wall 174. A communication port 222 is formed in the recess 221. The communication port 222 communicates with the ink supply port 129 via the ink supply unit 128 shown in FIG.

  When the sheet member 138 is joined to the case 137 having the above-described configuration, the concave portion 141 is configured as the ink containing portion 29 as shown in FIG. The recess 142 is configured as a buffer chamber 231, the recess 143 is configured as a buffer chamber 232, the recess 144 is configured as a buffer chamber 233, the recess 145 is configured as a buffer chamber 234, and the recess 146 is configured as a buffer chamber 235. The recess 147 is configured as the buffer chamber 236.

  In addition, the recess 148 is configured as the communication path 241, the recess 149 is configured as the communication path 242, and the notch 205 is configured as the communication path 243. The buffer chamber 231 to the buffer chamber 236 and the communication path 241 to the communication path 243 constitute a part of the atmosphere communication path 245. Note that FIG. 19 shows a case in which the case 137 is seen through the sheet member 138 for easy understanding of the configuration. Further, the joint portion 151 is hatched.

  Here, a support portion 246 is provided in the ink containing portion 29 as shown in FIG. The support portion 246 is provided on the partition wall 171. The support portion 246 protrudes from the partition wall 171 in the −Y axis direction. The support portion 246 is separated from each of the partition wall 172, the partition wall 173, the partition wall 174, the partition wall 175, and the partition wall 176. The support portion 246 has a plate-like appearance that extends along the YZ plane. The protruding amount of the support portion 246 from the partition wall 171 is set to be equal to the protruding amount of the partition walls 172 to 176 from the partition wall 171. And in the support part 246, the junction part 151 is provided in the opposite side to the partition 171 side, ie, the edge part of the -Y-axis direction. That is, in the tank 10, the sheet member 138 is also joined to the joint portion 151 of the support portion 246. According to this configuration, the deformation of the sheet member 138 can be restricted by the support portion 246.

  When the waterproof breathable film 152 (FIG. 16) and the sheet member 153 are joined to the case 137, the air communication path 245 is formed on the Y axis direction side of the partition wall 171, that is, on the front surface 135 of the tank 10 as shown in FIG. Part of A part of the atmosphere communication path 245 configured on the front surface 135 of the tank 10 is a region surrounded by the recess 155, the recess 156, the recess 157, the recess 158, and the sheet member 153. In addition, a part of the atmosphere communication path 245 configured on the front surface 135 of the tank 10 includes a region surrounded by the recess 154 (FIG. 16) and the waterproof ventilation film 152. The atmosphere communication path 245 also includes an atmosphere opening part 122.

  As described above, in the tank 10, the atmosphere communication path 245 is formed from the atmosphere opening port 123 to the communication hole 217 in the ink storage unit 29 shown in FIG. 19. The atmosphere communication path 245 allows communication between the atmosphere opening 123 and the communication hole 217. Accordingly, the tank 10 is configured to be able to introduce the atmosphere into the ink containing portion 29 from the atmosphere communication path 245. That is, the atmosphere communication path 245 communicates with the ink storage unit 29. Therefore, in the tank 10, a flow path that connects the ink supply port 129 (FIG. 13) from the atmosphere opening port 123 through the ink storage unit 29 is configured. An air communication path 245 is included in a part of this flow path.

  When the waterproof breathable film 152 and the sheet member 153 are joined to the case 137, a region surrounded by the recess 155 and the sheet member 153 is configured as a buffer chamber 251 as shown in FIG. A region surrounded by the recess 154 and the waterproof breathable film 152 is configured as a buffer chamber 252. In addition, a region surrounded by the recess 156 and the sheet member 153 is configured as a communication path 253, and a region surrounded by the recess 157 and the sheet member 153 is configured as a communication path 254, and is surrounded by the recess 158 and the sheet member 153. The region is configured as a communication path 255. As described above, the atmosphere communication path 245 includes the atmosphere opening portion 122, the buffer chamber 251, the communication path 253 to the communication path 255.

  The communication path 253 is located in the −Z axis direction of the buffer chamber 251 and extends along the X axis. The communication path 253 communicates between the communication hole 212 and the communication hole 213. The communication path 255 is located in the −Z-axis direction with respect to the communication path 253, and communicates between the communication hole 214 and the communication hole 215. The communication hole 214 and the communication hole 215 are located in the −Z axis direction with respect to the communication path 253. The communication hole 214 is located in the −X axis direction with respect to the communication hole 215. The communication path 255 extends from the communication hole 214 in the Z-axis direction, rotates at a position in the −Z-axis direction of the communication path 253, and extends in the X-axis direction. The communication path 255 rotates at a position in the −X axis direction of the communication hole 212, extends in the −Z axis direction, and reaches the communication hole 215.

  The communication path 254 is located in the −Z-axis direction with respect to the communication path 253, and communicates between the communication hole 216 and the communication hole 217. The communication hole 216 and the communication hole 217 are located in the −Z axis direction with respect to the communication path 253. The communication hole 216 and the communication hole 217 are located in the −X-axis direction with respect to the communication hole 215 and are located in the X-axis direction with respect to the communication hole 214. The communication path 254 extends in the Z-axis direction while meandering from the communication hole 216. The communication path 254 rotates at a position in the −Z-axis direction of the communication path 253 and extends in the −Z-axis direction to reach the communication hole 217. As shown in FIG. 20, the communication path 255 goes around the outside of the communication path 254. In the tank 10, the meandering of the communication path 254 can easily suppress the evaporation of the liquid component of the ink in the ink storage unit 29 (FIG. 19).

  The flow path from the atmosphere opening port 123 to the ink supply port 129 will be described with reference to a schematic diagram. Here, in order to facilitate understanding, a flow path from the atmosphere opening port 123 to the ink supply port 129 will be schematically described. The direction from the atmosphere opening port 123 toward the ink supply port 129 is the direction in which the fluid flows. This direction is used as a reference for “upstream” and “downstream”. That is, the atmosphere opening port 123 side is the upstream side with respect to the ink supply port 129, and the ink supply port 129 side is the downstream side with respect to the atmosphere opening port 123. As shown in FIG. 21, the flow path 260 from the atmosphere opening port 123 to the ink supply port 129 includes an atmosphere communication path 245, an ink storage unit 29, and an ink supply unit 128.

  The buffer chamber 251 is provided on the downstream side of the atmosphere opening part 122. Note that the opening on the buffer chamber 251 side in the atmosphere opening portion 122 is a communication port 218. The buffer chamber 251 is an area surrounded by the recess 155 of the case 137 and the sheet member 153. The buffer chamber 252 is provided on the downstream side of the buffer chamber 251. The buffer chamber 252 is an area surrounded by the recess 154 and the waterproof breathable film 152. The buffer chamber 252 is located in the buffer chamber 251. The atmosphere can move between the buffer chamber 251 and the buffer chamber 252 through the waterproof ventilation film 152.

  The buffer chamber 235 is provided on the downstream side of the buffer chamber 252. The buffer chamber 235 is an area surrounded by the recess 146 of the case 137 and the sheet member 138. The buffer chamber 252 and the buffer chamber 235 communicate with each other through a communication hole 211 that penetrates the partition wall 171 of the case 137. Note that the opening on the buffer chamber 252 side in the communication hole 211 is referred to as a communication port 261. The communication port 261 corresponds to a connection port between the buffer chamber 252 and the communication hole 211. Further, the opening on the buffer chamber 235 side in the communication hole 211 is referred to as a communication port 262. The communication port 262 corresponds to a connection port between the buffer chamber 235 and the communication hole 211.

  The buffer chamber 234 is provided on the downstream side of the buffer chamber 235. The buffer chamber 234 is an area surrounded by the recess 145 of the case 137 and the sheet member 138. The buffer chamber 235 and the buffer chamber 234 communicate with each other through the communication path 243 of the case 137. The communication path 243 is an area surrounded by the notch 205 formed in the partition 185 (FIG. 17) and the sheet member 138. An opening on the buffer chamber 235 side in the communication path 243 is denoted as a communication port 263. The communication port 263 corresponds to a connection port between the buffer chamber 235 and the communication path 243. In addition, the opening on the buffer chamber 234 side in the communication path 243 is referred to as a communication port 264. The communication port 264 corresponds to a connection port between the buffer chamber 234 and the communication path 243.

  The communication path 253 is provided on the downstream side of the buffer chamber 234. The communication path 253 is an area surrounded by the recess 156 of the case 137 and the sheet member 153. The buffer chamber 234 and the communication path 253 communicate with each other through a communication hole 212 that penetrates the partition wall 171 of the case 137. An opening on the buffer chamber 234 side in the communication hole 212 is denoted as a communication port 265. The communication port 265 corresponds to a connection port between the buffer chamber 234 and the communication hole 212. Further, the opening on the communication path 253 side in the communication hole 212 is referred to as a communication port 266. The communication port 266 corresponds to a connection port between the communication path 253 and the communication hole 212.

  The buffer chamber 236 is provided on the downstream side of the communication path 253. The buffer chamber 236 is an area surrounded by the recess 147 of the case 137 and the sheet member 138. The communication path 253 and the buffer chamber 236 communicate with each other through a communication hole 213 that penetrates the partition wall 171 of the case 137. An opening on the communication path 253 side in the communication hole 213 is denoted as a communication port 267. The communication port 267 corresponds to a connection port between the communication path 253 and the communication hole 213. Further, the opening on the buffer chamber 236 side in the communication hole 213 is referred to as a communication port 268. The communication port 268 corresponds to a connection port between the buffer chamber 236 and the communication hole 213.

  The buffer chamber 233 is provided on the downstream side of the buffer chamber 236. The buffer chamber 233 is an area surrounded by the recess 144 of the case 137 and the sheet member 138. The buffer chamber 236 and the buffer chamber 233 communicate with each other through the communication path 242 of the case 137. The communication path 242 is an area surrounded by the recess 149 (FIG. 17) of the case 137 and the sheet member 138. An opening on the buffer chamber 236 side in the communication path 242 is a connection portion 203. In addition, the opening on the buffer chamber 233 side in the communication path 242 is a connection portion 204.

  The buffer chamber 232 is provided on the downstream side of the buffer chamber 233. The buffer chamber 232 is a region surrounded by the recess 143 of the case 137 and the sheet member 138. The buffer chamber 233 and the buffer chamber 232 communicate with each other via the communication path 241 of the case 137. The communication path 241 is an area surrounded by the recess 148 (FIG. 17) of the case 137 and the sheet member 138. An opening on the buffer chamber 233 side in the communication path 241 is a connection portion 201. In addition, the opening on the buffer chamber 232 side in the communication path 241 is the connection portion 202.

  The communication path 255 is provided on the downstream side of the buffer chamber 232. The communication path 255 is an area surrounded by the recess 158 of the case 137 and the sheet member 153. The buffer chamber 232 and the communication path 255 communicate with each other through a communication hole 214 that penetrates the partition wall 171 of the case 137. An opening on the buffer chamber 232 side in the communication hole 214 is denoted as a communication port 269. The communication port 269 corresponds to a connection port between the buffer chamber 232 and the communication hole 214. Further, the opening on the communication path 255 side in the communication hole 214 is referred to as a communication port 270. The communication port 270 corresponds to a connection port between the communication path 255 and the communication hole 214.

  The buffer chamber 231 is provided on the downstream side of the communication path 255. The buffer chamber 231 is an area surrounded by the recess 142 of the case 137 and the sheet member 138. The communication path 255 and the buffer chamber 231 communicate with each other through a communication hole 215 that penetrates the partition wall 171 of the case 137. The opening on the communication path 255 side in the communication hole 215 is referred to as a communication port 271. The communication port 271 corresponds to a connection port between the communication path 255 and the communication hole 215. Further, the opening on the buffer chamber 231 side in the communication hole 215 is referred to as a communication port 272. The communication port 272 corresponds to a connection port between the buffer chamber 231 and the communication hole 215.

  The communication path 254 is provided on the downstream side of the buffer chamber 231. The communication path 254 is an area surrounded by the recess 157 (FIG. 18) of the case 137 and the sheet member 153. The buffer chamber 231 and the communication path 254 communicate with each other through a communication hole 216 that penetrates the partition wall 171. An opening on the buffer chamber 231 side in the communication hole 216 is referred to as a communication port 273. The communication port 273 corresponds to a connection port between the buffer chamber 231 and the communication hole 216. In addition, the opening on the communication path 254 side in the communication hole 216 is referred to as a communication port 274. The communication port 274 corresponds to a connection port between the communication path 254 and the communication hole 216.

  The ink storage unit 29 is provided on the downstream side of the communication path 254. The ink containing portion 29 is a region surrounded by the concave portion 141 of the case 137 and the sheet member 138. The communication path 254 and the ink containing portion 29 communicate with each other through a communication hole 217 that penetrates the partition wall 171. The opening on the communication path 254 side in the communication hole 217 is referred to as a communication port 275. The communication port 275 corresponds to a connection port between the communication path 254 and the communication hole 217. In addition, the opening on the ink containing portion 29 side in the communication hole 217 is referred to as a communication port 276. The communication port 276 corresponds to a connection port between the ink storage unit 29 and the communication hole 217. The communication port 276 corresponds to an air introduction port. Thereby, the atmosphere communication path 245 allows the atmosphere opening port 123 and the communication port 276 to communicate with each other.

  An ink supply unit 128 is provided on the downstream side of the ink storage unit 29. An opening on the ink storage unit 29 side of the ink supply unit 128 is a communication port 222. The communication port 222 corresponds to a connection port between the ink storage unit 29 and the ink supply unit 128. The ink supply port 129 is an opening of the ink supply unit 128 opposite to the ink storage unit 29 side. In the tank 10, the flow path 260 from the atmosphere opening port 123 to the ink supply port 129 has the above-described configuration.

  When the ink in the ink storage unit 29 is supplied to the printing unit 42 (FIG. 3) via the ink supply port 129, the amount of ink in the ink storage unit 29 decreases. When the amount of ink in the ink storage unit 29 decreases, the pressure in the ink storage unit 29 tends to be lower than the atmospheric pressure. In the present embodiment, an air communication path 245 from the air opening 123 to the communication hole 217 communicates with the ink containing portion 29. For this reason, when the amount of ink in the ink container 29 decreases and the pressure in the ink container 29 becomes lower than the atmospheric pressure, the atmosphere can be introduced into the ink container 29 via the atmosphere communication path 245. As a result, the pressure in the ink containing portion 29 is easily maintained at atmospheric pressure.

  At this time, the atmosphere introduced into the ink containing portion 29 flows into the buffer chamber 251 from the atmosphere opening port 123 through the atmosphere opening portion 122. The air flowing into the buffer chamber 251 flows into the buffer chamber 252 through the waterproof ventilation film 152. The air flowing into the buffer chamber 252 flows into the buffer chamber 235 from the communication port 261 through the communication port 262 of the communication hole 211. The air flowing into the buffer chamber 235 flows into the buffer chamber 234 from the communication port 263 through the communication port 264 of the communication path 243.

  The air flowing into the buffer chamber 234 flows into the communication path 253 from the communication port 265 through the communication port 266 of the communication hole 212. The air that has flowed into the communication passage 253 flows into the buffer chamber 236 from the communication port 267 through the communication port 268 of the communication hole 213. The air that has flowed into the buffer chamber 236 flows into the buffer chamber 233 from the connection portion 203 through the connection portion 204 of the communication path 242. The air that has flowed into the buffer chamber 233 flows into the buffer chamber 232 from the connection portion 201 through the connection portion 202 of the communication path 241.

  The air that has flowed into the buffer chamber 232 flows into the communication path 255 from the communication port 269 through the communication port 270 of the communication hole 214. The air flowing into the communication path 255 flows into the buffer chamber 231 from the communication port 271 through the communication port 272 of the communication hole 215. The air flowing into the buffer chamber 231 flows into the communication path 254 from the communication port 273 through the communication port 274 of the communication hole 216. The air that has flowed into the communication path 254 flows from the communication port 275 through the communication port 276 of the communication hole 217 into the ink storage unit 29.

  In the tank 10, as shown in FIG. 22, the communication port 276 is formed in a position separated from the corner portion 281 where the partition wall 171 intersects with another wall in the ink containing portion 29. The other walls that intersect with the partition 171 in the ink containing portion 29 are the partition 172 to the partition 176. In the tank 10, the communication port 276 is formed at a position separated from the corner portion 281 where these walls and the partition wall 171 intersect. Accordingly, the ink moving along the corner portion 281 where the partition wall 171 and the other wall intersect in the ink containing portion 29 is difficult to reach the communication port 276. As a result, it is possible to reduce the possibility that the ink in the ink storage unit 29 leaks out of the tank 10 through the atmosphere communication path 245.

  Here, it has been found that a capillary phenomenon may occur in the corner portion where the partition wall 172 to the partition wall 176 of the case 137 intersect with the sheet member 138 in the ink containing portion 29. That is, in the tank in which the air inlet is provided at the corner where the partition wall 172 to the partition wall 176 intersect with the sheet member 138, the ink stored in the ink storage unit 29 is the boundary portion between the wall of the case 137 and the sheet member 138. May enter the atmosphere communication path 245. When this occurs, it is conceivable that the ink in the ink containing portion 29 leaks out of the tank through the atmosphere communication path 245. Note that the portion where the capillary phenomenon appears is not limited to the corner where the wall of the case 137 and the sheet member 138 intersect. The sheet member 138 can be regarded as one wall that partitions the ink containing portion 29. Therefore, the capillary phenomenon can be manifested at the intersecting portion (corner portion) of the two walls that intersect each other among the walls that define the ink containing portion 29.

  In the tank 10, since the communication port 276 is formed at a position separated from the corner portion 281, it is possible to suppress the ink that has traveled up the corner portion 281 due to capillary action from reaching the communication port 276. As a result, it is possible to reduce the possibility that the ink in the ink storage unit 29 leaks out of the tank 10 through the atmosphere communication path 245.

  Further, in the tank 10, a wall facing the partition wall 171 in which the communication port 276 is formed is configured by a sheet member 138. For this reason, since the communication port 276 is separated from the sheet member 138, it is possible to suppress the ink transmitted through the sheet member 138 from reaching the communication port 276 to a low level. In general, the liquid is more easily moved (slidable) in the sheet member 138 than in the resin material constituting the case 137. Since the communication port 276 can be separated from the sheet member 138 in which the liquid easily moves, the ink is more difficult to reach the communication port 276. The sheet member 138 corresponds to a film.

  In the tank 10, the atmosphere communication path 245 includes a buffer chamber 231, a buffer chamber 232, a buffer chamber 233, a buffer chamber 234, a buffer chamber 235, and a buffer chamber 236. The buffer chamber 231, the buffer chamber 232, the buffer chamber 233, the buffer chamber 234, the buffer chamber 235, and the buffer chamber 236 are located upstream of the ink storage unit 29. According to this configuration, the ink that has flowed out of the ink containing portion 29 into the atmosphere communication path 245 can be easily retained in the buffer chamber 231 to the buffer chamber 236. Thereby, the possibility that the ink in the ink containing portion 29 leaks out of the tank 10 through the atmosphere communication path 245 can be further reduced. The buffer chamber 231, the buffer chamber 232, the buffer chamber 233, the buffer chamber 234, the buffer chamber 235, and the buffer chamber 236 correspond to the second chamber.

  In the tank 10, the width D1 of the cross-sectional opening of the communication passage 254 (FIG. 20) connected to the circular communication port 276 is the same as the diameter D2 inside the communication port 276. Note that the same is not limited to completely the same, and includes mismatches caused by errors, tolerances, and the like. The width of the cross-sectional opening of the communication path 254 is an inner width in a direction orthogonal to the flow direction when the fluid flows through the communication path 254. For example, as shown in FIG. 20, a region extending in the Z-axis direction from the communication hole 217 in the communication path 254 corresponds to the inner width along the X-axis direction. Since the inner diameter of the communication port 276 is the same as the width of the cross-sectional opening of the communication channel 254, the ink that has entered the communication channel 254 when the ink in the ink containing portion 29 enters the communication channel 254 from the communication port 276. Is easy to return to the ink container 29. The communication path 254 corresponds to a communication flow path.

  Further, in the tank 10, the ink supply port 129 is located at a position in the −Y axis direction from the partition wall 171, that is, on the side facing the partition wall 171 as shown in FIG. 16. As a result, the ink in the ink containing portion 29 flows toward the ink supply port 129 located on the side facing the communication port 276. In other words, the ink in the ink container 29 flows in a direction away from the communication port 276. For this reason, the possibility of ink leaking from the atmosphere opening port 123 through the communication port 276 can be reduced.

  Further, in the tank 10, as shown in FIG. 12, a cylindrical wall 124 surrounding the atmosphere opening 123 is provided. Thereby, the cylinder wall 124 surrounding the atmosphere opening port 123 makes it easy for the ink flowing out from the atmosphere opening port 123 to be retained by the tube wall 124. The cylindrical wall 124 corresponds to the second convex portion.

  In the tank 10, as shown in FIG. 22, an upper limit mark 48 is provided on the partition wall 172 extending in the direction (Z-axis direction) intersecting the horizontal direction (Y-axis direction) in the use posture. In the tank 10, the communication port 276 is located above the upper limit mark 48. Thereby, even if the ink in the ink storage unit 29 reaches the upper limit mark 48, the ink in the ink storage unit 29 does not easily reach the communication port 276. Thereby, the possibility that the ink in the ink containing portion 29 leaks out of the tank 10 through the atmosphere communication path 245 can be further reduced.

  Further, in the tank 10, the total volume of the buffer chamber 231, the buffer chamber 232, the buffer chamber 233, the buffer chamber 234, the buffer chamber 235, and the buffer chamber 236 is the upper limit mark 48. Is equal to or larger than the ink volume when the ink volume is reached. As a result, even if the ink in the ink storage unit 29 flows out to the atmosphere communication path 245, the ink in the ink storage unit 29 can be received in the buffer chamber 231 to the buffer chamber 236. For this reason, since the ink that has flowed out of the ink storage unit 29 into the atmosphere communication path 245 can be easily retained in the buffer chamber 231 to the buffer chamber 236, the ink in the ink storage unit 29 is placed outside the tank 10 through the atmosphere communication path 245. The possibility of leakage can be further reduced.

  Further, in the tank 10, when the ink in the ink containing portion 29 reaches the upper limit mark 48 in the use posture, the communication port 276 is opened when the posture of the tank 10 is changed to a posture in which the partition wall 172 is directed downward. The ink container 29 is located above the ink level. Accordingly, even if the posture of the tank 10 is changed from the state in which the ink in the ink containing portion 29 reaches the upper limit mark 48 in the use posture to the posture in which the partition wall 172 faces downward, the ink in the ink containing portion 29 remains. It is difficult to reach the communication port 276. Therefore, even if the posture of the tank 10 is changed to a posture in which the partition wall 172 faces downward (in other words, a posture in which the partition wall 172 is directed to the installation surface (XY plane) of the printer 1), the ink in the ink containing portion 29 remains in the atmosphere. The possibility of leaking out of the tank 10 through the communication path 245 can be reduced.

  Further, in the tank 10, as shown in FIG. 22, the partition wall 176 extending in the direction intersecting with the partition wall 171 is provided with a plate wall 282 protruding from the partition wall 176 to the inside of the ink containing portion 29 (−Y axis direction). Can also be employed. The plate wall 282 is provided between the ink injection port 45 </ b> C and the communication port 276. The plate wall 282 separates the ink inlet 45C from the communication port 276. Accordingly, when ink is injected from the ink injection port 45 </ b> C into the ink storage portion 29, it is possible to suppress the scattered ink from adhering to the communication port 276, and the ink can leak out of the tank 10 from the communication port 276. Can be further reduced. The plate wall 282 may be provided between the ink injection port 45C and the communication port 276, and may be provided in the partition wall 175, for example. The partition 175 and the partition 176 correspond to the second wall.

(Modification 1)
In the tank 10, as shown in FIG. 23, which is a cross-sectional view illustrating the communication port 276 in the first modification, the communication port 276 is located inwardly of the ink containing portion 29 (−Y axis direction) than the first inner surface 285 of the partition wall 171. The structure formed in the 2nd inner surface 286 which protruded in FIG. Note that the cross-sectional view shown in FIG. 23 corresponds to the cross-sectional view taken along the line BB in FIG. In the example shown in FIG. 23, the surface of the partition wall 171 on the ink containing portion 29 side has a first inner surface 285 and a second inner surface 286. The first inner surface 285 and the second inner surface 286 have a step in the Y-axis direction. The second inner surface 286 protrudes in the −Y axis direction from the first inner surface 285. The communication port 276 opens on the second inner surface 286. In this configuration, since the communication port 276 is opened to the second inner surface 286 that protrudes inward from the first inner surface 285 into the ink storage unit 29, the ink in the ink storage unit 29 is difficult to reach the communication port 276. Become. Thereby, the possibility that the ink in the ink containing portion 29 leaks out of the tank 10 through the atmosphere communication path 245 can be further reduced.

(Modification 2)
Further, in the tank 10, as shown in FIG. 24, a convex portion that protrudes from the partition wall 171 to the opposite side in the ink storage portion 29 on a part of the outer periphery of the communication port 276 in the partition wall 171 in the ink storage portion 29. A configuration provided with 287 can also be adopted. In the tank 10, the opposite side from the partition wall 171 in the ink containing portion 29 is the −Y axial direction side from the partition wall 171, and is the sheet member 138 (FIG. 15) side. In this configuration, since the convex portion 287 is formed around the communication port 276, it becomes difficult for the ink in the ink containing portion 29 to reach the communication port 276. Thereby, the possibility that the ink in the ink containing portion 29 leaks out of the tank 10 through the atmosphere communication path 245 can be further reduced.

(Modification 3)
In the tank 10, as shown in FIG. 25, a configuration in which the convex portion 287 has a cylindrical shape surrounding the entire circumference of the communication port 276 can be adopted. In this configuration, since the convex portion 287 surrounds the entire circumference of the communication port 276, it becomes more difficult for the ink in the ink storage unit 29 to reach the communication port 276.

(Modification 4)
In the tank 10, as shown in FIG. 26, a configuration in which a communication port 276 is formed in the second inner surface 286 and a cylindrical convex portion 287 surrounding the entire circumference of the communication port 276 may be employed. According to this configuration, the ink in the ink containing portion 29 is less likely to reach the communication port 276.

(Modification 5)
The tank 10 is not limited to the structure and shape described above. As the tank 10, for example, as shown in FIG. 27, a structure in which an air chamber 289 is formed in the ink containing portion 29 can be adopted. In the tank 10 of the modified example 5, a space is formed above the ink 291 in a state where the ink 291 in the ink containing portion 29 reaches the upper limit mark 48. In the tank 10 of the modified example 5, the space formed above the ink 291 is configured as an atmospheric chamber 289. A communication port 276 is opened in the wall 293 of the case 292. The wall 293 corresponds to the first wall and is provided at a position facing the sheet member 294. The case 292 is made of the same material as the case 137, and the sheet member 294 is made of the same material as the sheet member 138.

  Also in the tank 10 of the modified example 5, the communication port 276 is formed at a position separated from the corner portion 281 where the wall 293 and the other wall intersect in the ink containing portion 29. The wall 293 in which the communication port 276 is opened faces the sheet member 294, and the communication port 276 is separated from the sheet member 294. In the tank 10 of the modified example 5, a configuration in which a plate wall 282 is provided between the ink injection port 45C and the communication port 276 may be employed.

  In the tank 10, as shown in FIG. 22, the partition 174 is inclined so as to descend downward from the partition 172 toward the partition 173. In other words, the partition wall 174 is inclined so as to be lowered in the −Z-axis direction toward the −X-axis direction. Moreover, the partition 174 is inclined so as to descend downward from the partition 171 toward the sheet member 138 (FIG. 15). In other words, the partition wall 174 is inclined so as to be lowered in the −Z-axis direction toward the −Y-axis direction. Therefore, the tank 10 includes a partition wall 172, a partition wall 173 that faces the partition wall 172, and a partition wall 174 that connects the partition wall 172 and the partition wall 173. The partition wall 171 includes the partition wall 174, the partition wall 172, and the partition wall 173. The sheet member 138 intersects the partition wall 174, the partition wall 172, and the partition wall 173. The partition wall 174 is inclined downward from the partition wall 172 toward the partition wall 173, and is directed from the partition wall 171 toward the sheet member 138. It can be expressed that the ink supply unit 128 is provided at the lowermost part of the partition wall 174.

  That is, the partition wall 174 is inclined so as to descend from the corner portion 281 between the partition wall 171 and the partition wall 172 toward the ink supply unit 128. In other words, the partition 174 is inclined along a diagonal line from the corner 281 between the partition 171 and the partition 172 toward the ink supply unit 128 when viewed in plan in the −Z-axis direction. According to this configuration, the ink in the ink storage unit 29 flows toward the ink supply unit 128 along the inclination of the partition wall 174. Thereby, it is difficult for ink to remain in the partition wall 174, and the remaining amount of ink in the ink containing portion 29 can be reduced. Furthermore, if the partition 174 is subjected to a process that exhibits liquid repellency with respect to the ink or a process that exhibits lyophilicity, the remaining amount of ink in the ink container 29 can be further reduced.

  In the tank 10, as shown in FIG. 13, a plurality of legs 126 are provided on the surface 108 of the partition wall 174 facing the −Z axis direction. In the tank 10, as shown in FIG. 22, the plurality of leg portions 126 differ in the amount of protrusion from the partition wall 174 depending on the position in the X-axis direction. The plurality of leg portions 126 have different amounts of protrusion from the partition 174 depending on the position in the Y-axis direction. This is due to the inclination of the partition 174. That is, in the tank 10, the protruding amount of the leg portion 126 decreases along the inclination of the partition wall 174, that is, from the corner portion 281 between the partition wall 171 and the partition wall 172 toward the ink supply unit 128. Thereby, even if the partition 174 is inclined, the use posture of the tank 10 can be maintained.

  In the tank 10, as shown in FIG. 16, the ink supply unit 128 is provided on the Y-axis direction side of the overhanging portion 127, and protrudes from the overhanging portion 127 in the Y-axis direction. According to this configuration, the degree of freedom of piping of the ink supply tube 43 (FIG. 3) connected to the ink supply unit 128 can be increased.

  Further, in the tank 10, as shown in FIG. 14, a cylindrical wall 124 that surrounds the atmosphere opening portion 122 is provided. In the printer 1, the airtight performance of the tank 10 may be tested while the tank 10 is incorporated in the printer 1. In the test of the airtight performance of the tank 10, a method is adopted in which pressure leakage is tested by pressurizing one of the pressure in the injection part 45 and the cylindrical wall 124 while the injection part 45 and the cylindrical wall 124 are closed. Is done. At this time, the cylindrical wall 124 can be utilized. Since the cylindrical wall 124 has a wider opening than the atmosphere opening part 122, it is less mechanically difficult to close the cylinder wall 124 than to close the atmosphere opening part 122.

  As shown in FIG. 28, a seal member 301 made of rubber or elastomer is pressed against the cylindrical wall 124. At this time, it is possible to allow the positional accuracy of the seal member 301 to close the cylindrical wall 124 having a wide opening, rather than closing the atmosphere opening portion 122. In this respect, it is less mechanically difficult to close the cylindrical wall 124 than to close the air opening portion 122. And the pressure in the tank 10 is raised by supplying compressed air in the state which obstruct | occluded the cylinder wall 124 with the sealing member 301. FIG. As a mechanism for moving the seal member 301 up and down, for example, a vertical movement mechanism such as a cylinder can be employed.

  When the sealing member 301 is pressed against the cylindrical wall 124, the position of the tank 10 is easily displaced by the pressing by the sealing member 301. As shown in FIG. 14, the tank 10 is provided with a fixed portion 125. The fixed part 125 has a shape cut out in a U-shape. In the tank 10, the fixed portion 125 is fixed to the casing 6 of the printer 1 with a screw. Thereby, it is easy to suppress that the position of the tank 10 is easily shifted due to the pressing by the seal member 301.

  In the tank 10, the fixed portion 125 is provided on the surface 106 corresponding to the top plate portion of the tank 10. With this configuration, since the tank 10 is fixed at a position close to the uppermost portion, it is easy to effectively suppress the position from being easily displaced by pressing by the seal member 301. The fixing of the fixed portion 125 is not limited to screw fixing, and various fixing methods such as engagement by hooks, bonding such as adhesion and welding, and the like can be adopted. Further, the shape of the cylindrical wall 124 is not limited to a cylindrical shape, and various shapes such as an elliptical shape and a polygonal shape can be adopted.

  In the printer 1 according to the present embodiment, as illustrated in FIG. 29, the printing unit 42 is configured to be able to reciprocate in a movable region between the standby position 311 and the folding position 312. The ink supply tube 43 connected to the tank 10 and the printing unit 42 is configured to be able to advance and retract flexibly following the reciprocating movement of the printing unit 42. In FIG. 29, the scanner unit 5 (FIG. 3) and the housing 7 are not shown for easy understanding of the configuration.

  In each of the above-described embodiments and examples, the liquid ejecting apparatus may be a liquid ejecting apparatus that consumes by ejecting, discharging, or applying a liquid other than ink. Note that the state of the liquid ejected as a minute amount of liquid droplets from the liquid ejecting apparatus includes a granular shape, a tear shape, and a thread-like shape. The liquid here may be any material that can be consumed by the liquid ejecting apparatus. For example, it may be in a state in which the substance is in a liquid phase, such as a liquid with high or low viscosity, sol, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals (metal melts ). Further, not only a liquid as one state of a substance but also a substance in which particles of a functional material made of a solid such as a pigment or a metal particle are dissolved, dispersed or mixed in a solvent is included. As a typical example of the liquid, in addition to the ink described in each of the above embodiments, a liquid crystal or the like can be given. Here, the ink includes general water-based inks and oil-based inks, and various liquid compositions such as gel inks and hot melt inks. Further, sublimation transfer ink can be used as the ink. The sublimation transfer ink is an ink containing a sublimation color material such as a sublimation dye. In the printing method, such a sublimation transfer ink is ejected onto a transfer medium by a liquid ejecting apparatus, the transfer medium is brought into contact with the printing material, heated to sublimate the color material, and transferred to the printing material. The substrate is a T-shirt, a smartphone, or the like. As described above, if the ink includes a sublimable color material, printing can be performed on various printed materials (printing media). As a specific example of the liquid ejecting apparatus, for example, a liquid containing a material such as an electrode material or a color material used for manufacturing a liquid crystal display, an EL (electroluminescence) display, a surface emitting display, or a color filter in a dispersed or dissolved form. There is a liquid ejecting apparatus for ejecting the liquid. Further, it may be a liquid ejecting apparatus that ejects a bio-organic matter used for biochip manufacturing, a liquid ejecting apparatus that ejects liquid as a sample that is used as a precision pipette, a printing apparatus, a micro dispenser, or the like. In addition, transparent resin liquids such as UV curable resin to form liquid injection devices that pinpoint lubricant oil onto precision machines such as watches and cameras, and micro hemispherical lenses (optical lenses) used in optical communication elements. May be a liquid ejecting apparatus that ejects the liquid onto the substrate. Further, it may be a liquid ejecting apparatus that ejects an etching solution such as acid or alkali in order to etch a substrate or the like.

  The present invention is not limited to the above-described embodiments and examples, and can be realized with various configurations without departing from the spirit of the present invention. For example, the technical features in the embodiments and examples corresponding to the technical features in each embodiment described in the summary section of the invention may be used to solve part or all of the above-described problems, or In order to achieve part or all of the effects, replacement or combination can be performed as appropriate. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

  DESCRIPTION OF SYMBOLS 1 ... Printer, 3 ... Printing unit, 4 ... Tank unit, 5 ... Scanner unit, 10 ... Tank, 29 ... Ink storage part, 42 ... Printing part, 43 ... Ink supply tube, 45 ... Injection | pouring part, 45A ... Tube part, 45B: Ink introduction port, 45C ... Ink injection port, 46 ... Viewing surface, 47 ... Cover, 48 ... Upper limit mark, 49 ... Lower limit mark, 122 ... Atmospheric release portion, 123 ... Atmospheric release port, 124 ... Cylindrical wall, 125 ... Fixed part, 126 ... Leg part, 128 ... Ink supply part, 129 ... Ink supply port, 137 ... Case, 138 ... Sheet member, 141-149 ... Recessed part, 171-189 ... Partition, 231-236 ... Buffer chamber, 261- 276 ... Communication port, 281 ... Corner, 282 ... Plate wall, 285 ... First inner surface, 286 ... Second inner surface, 287 ... Projection, P ... Printing medium.

Claims (14)

A first chamber surrounded by a plurality of walls and capable of containing a liquid;
A liquid inlet for injecting the liquid into the first chamber;
An air opening that is open to the atmosphere;
A liquid outlet for extracting the liquid from the first chamber;
Of the plurality of walls surrounding the first chamber, an air inlet formed in a first wall different from the wall constituting the top surface;
An atmosphere communication path communicating between the atmosphere opening and the atmosphere introduction port,
The atmosphere introduction port is formed at a position separated from a corner where the first wall and the other wall intersect.
A liquid container characterized by that. The liquid container according to claim 1,
Of the plurality of walls, the wall facing the first wall is made of a film,
A liquid container characterized by that. The liquid container according to claim 1 or 2,
The atmosphere communication path includes a second chamber;
The second chamber is located on the upstream side of the first chamber in the path of the atmosphere flowing into the first chamber from the atmosphere opening port through the atmosphere introduction port.
A liquid container characterized by that. In the liquid container according to any one of claims 1 to 3,
In the first chamber, a convex portion that protrudes from the first wall to the opposite side of the first chamber is formed on at least a part of the outer periphery of the atmosphere introduction port in the first wall.
A liquid container characterized by that. The liquid container according to claim 4.
The convex portion has a cylindrical shape surrounding the entire circumference of the atmosphere introduction port,
A liquid container characterized by that. The liquid container according to any one of claims 1 to 5,
The atmosphere communication path includes a communication channel connected to the atmosphere introduction port,
The atmosphere inlet has a circular shape,
The inner diameter of the air inlet is the same as the width of the cross-sectional opening of the communication channel.
A liquid container characterized by that. The liquid container according to any one of claims 1 to 6,
Furthermore,
In the first chamber, the first wall has a first inner surface, and a second inner surface that protrudes inward of the first chamber from the first inner surface,
The air inlet is opened in the second inner surface;
A liquid container characterized by that. In the liquid container according to any one of claims 1 to 7,
The liquid outlet is formed on the side facing the first wall,
A liquid container characterized by that. In the liquid container according to any one of claims 1 to 8,
Furthermore, it has a second convex portion surrounding the atmosphere opening,
A liquid container characterized by that. In the liquid container according to any one of claims 1 to 9,
The plurality of walls include a viewing wall capable of visually recognizing the liquid level in the first chamber,
The viewing wall extends in a direction intersecting the horizontal direction in the usage posture of the liquid container,
The viewing wall is provided with an upper limit mark indicating an upper limit of the amount of the liquid that can be injected into the first chamber,
The atmosphere introduction port is located above the upper limit mark,
A liquid container characterized by that. The liquid container according to claim 3.
The plurality of walls include a viewing wall capable of visually recognizing the liquid level in the first chamber,
The viewing wall extends in a direction intersecting the horizontal direction in the usage posture of the liquid container,
The viewing wall is provided with an upper limit mark indicating an upper limit of the amount of the liquid that can be injected into the first chamber,
The volume of the second chamber is equal to or larger than the volume of the liquid when the liquid level in the first chamber reaches the upper limit mark,
A liquid container characterized by that. The liquid container according to claim 10,
When changing the posture of the liquid container from the state in which the liquid in the first chamber reaches the upper limit mark in the use posture to a posture in which the viewing wall is directed downward,
The air inlet is positioned above the liquid level of the liquid in the first chamber;
A liquid container characterized by that. The liquid container according to any one of claims 1 to 12,
The liquid inlet is provided in a second wall extending in a direction intersecting the first wall among the plurality of walls.
A plate wall protruding from the second wall to the inside of the first chamber is provided between the liquid inlet and the air inlet.
A liquid container characterized by that. A liquid jet head capable of jetting liquid;
A liquid container capable of supplying liquid to the liquid ejecting head,
The liquid container is
A first chamber surrounded by a plurality of walls and capable of containing a liquid;
A liquid inlet for injecting the liquid into the first chamber;
An air opening that is open to the atmosphere;
A liquid outlet for extracting the liquid from the first chamber;
Of the plurality of walls surrounding the first chamber, an air inlet formed in a first wall different from the wall constituting the top surface;
An atmosphere communication path communicating between the atmosphere opening and the atmosphere introduction port,
The atmosphere introduction port is formed at a position separated from a corner where the first wall and the other wall intersect.
A liquid ejecting apparatus.

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