Patent Publication Number: US-10328707-B2

Title: Liquid container

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims the priority based on Japanese Patent Applications No. 2017-035662 filed on Feb. 28, 2017, the disclosure of which is hereby incorporated by reference in their entirety. 
     BACKGROUND 
     1. Technical Field 
     The present invention relates to a liquid container. 
     2. Related Art 
     JP-A-2014-54787 discloses a liquid container that is mounted to a liquid consumption apparatus. 
     JP-A-2014-54787 is an example of related art. 
     Liquid containers are filled with liquid. Therefore, for example, when such a liquid container is dropped, impact that is transmitted to a liquid container is larger than in a case where a liquid container without liquid is dropped. The larger the impact that is transmitted to the liquid container is, the more likely that the constituent parts that constitute the liquid container and joint portions between the constituent parts will be damaged or break. In particular, a liquid container used for a liquid consumption apparatus that performs printing on large-sized paper is filled with a large amount of liquid, and thus such a problem is significant. Therefore, there is demand for a technique that makes it possible to mitigate impact on the liquid container when the liquid container is dropped or hits another object. 
     SUMMARY 
     The invention has been made in order to solve at least a portion of the above-described issue, and can be realized as the following mode. 
     1. According to one mode of the invention, a liquid container that contains liquid that is used in a liquid consumption apparatus is provided. This liquid container includes a liquid storage portion that is surrounded by a plurality of wall portions, and contains liquid therein, and a plurality of contact portions are provided on a first wall portion among the plurality of wall portions, the plurality of contact portions contact with terminals on-the-apparatus-side provided in the liquid consumption apparatus, when the liquid container is mounted in the liquid consumption apparatus. The plurality of contact portions are provided at a position close to a first edge side among the first edge side and a second edge side of the first wall portion, the first edge side and a second edge side are arranged face each other, at least some contact portions, from among the plurality of contact portions, form at least one column arranged along the first edge side, the liquid container includes protruding portions outward of outer contact portions that are the outermost contact portions in the column, and the protruding portions are provided between an end portion on the first edge side of the outer contact portions and the first edge side in a direction from the first edge side toward the column. With the liquid container having such a mode, the protruding portions are provided outward of the contact portions, and thus it is possible to mitigate impact on the contact portions constituting the liquid container. 
     2. In the liquid container in the above mode, the protruding portions may protrude more than the plurality of contact portions. In such a mode, it is possible to more effectively mitigate impact on the contact portions. 
     3. In the liquid container in the above mode, a second wall portion that intersects the first wall portion may be included, a liquid supply portion for supplying the liquid to the liquid consumption apparatus may be provided on the second wall portion, and the liquid supply portion may be provided on the second wall portion, at a position close to the first edge side of the first wall portion. In such a mode, the liquid supply portion, the contact portions, and the protruding portions are arranged so as to be gathered at a portion of the liquid container. Therefore, even if the size of the liquid storage portion is changed, the mounting compatibility of the liquid container to the liquid consumption apparatus can be easily maintained. 
     The invention can be realized in various modes in addition to the modes as the above-described liquid container. For example, the invention can be realized in modes such as a liquid consumption apparatus that has a liquid container, and a liquid consumption system that has a liquid container and a liquid consumption apparatus. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view showing a schematic configuration of a liquid consumption system. 
         FIG. 2  is a perspective view of a holder. 
         FIG. 3  is a perspective view showing a state where cartridges are mounted in the holder. 
         FIG. 4  is a bottom view of a cartridge. 
         FIG. 5  is a plan view of the cartridge. 
         FIG. 6  is a left side view of the cartridge. 
         FIG. 7  is a right side view of the cartridge. 
         FIG. 8  is a rear view of the cartridge. 
         FIG. 9  is a front view of the cartridge. 
         FIG. 10  is an explanatory view showing the concept of an ink detection process. 
         FIG. 11  is a perspective view of the cartridge. 
         FIG. 12  is an enlarged view of a region A in  FIG. 11 . 
         FIG. 13  is an enlarged view of a circuit substrate. 
         FIG. 14  is a diagram for illustrating an effect in this embodiment. 
         FIG. 15  is an enlarged view of a region C in  FIG. 14 . 
         FIG. 16  is a diagram showing a comparison example. 
         FIG. 17  is a perspective view showing the internal structure on the left wall portion side of the cartridge. 
         FIG. 18  is a diagram showing the internal structure on the left wall portion side of the cartridge. 
         FIG. 19  is a diagram showing the internal structure on the right wall portion side of the cartridge. 
         FIG. 20  is a cross-sectional view along XX-XX in  FIG. 18 . 
         FIG. 21  is a diagram showing a flow of atmospheric air in the cartridge. 
         FIG. 22  is a diagram showing a flow of ink in the cartridge. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     A. Configuration of Liquid Consumption System 
       FIG. 1  is a perspective view showing a schematic configuration of a liquid consumption system  100  in one embodiment of the invention. The liquid consumption system  100  in this embodiment has an inkjet printer  110  that is an example of a liquid consumption apparatus and cartridges  120  that are examples of a liquid container, as shown in  FIG. 1 . The printer  110  is a printer that can perform printing on large-sized paper exceeding an A4 size. 
     The cartridges  120  can contain ink that is an example of a liquid. The liquid consumption system  100  has a plurality of cartridges  120 . Note that in this embodiment, the printer  110  is equipped with four cartridges  120 . The liquid consumption system  100  can perform printing on a recording medium such as recording paper using ink that is an example of a liquid. Note that the number of cartridges  120  that can be mounted in the printer  110  is not limited to four, and one or more or any number of cartridges  120  can be adopted. 
     In  FIG. 1 , X, Y, and Z axes that are coordinate axes orthogonal to each other are given. In the figures shown hereinafter, the X, Y, and Z axes are given as necessary. The X, Y, and Z axes in the drawings correspond to the X, Y, and Z axes  FIG. 1 .  FIG. 1  illustrates a state where the liquid consumption system  100  is arranged on an XY plane defined by the X axis and the Y axis. In this embodiment, a state where the liquid consumption system  100  is arranged on the XY plane when the XY plane is made to match a horizontal flat surface is an in-use state of the liquid consumption system  100 . The orientation of the liquid consumption system  100  when the liquid consumption system  100  is arranged on the XY plane that is made to match a horizontal surface is called a usage orientation of the liquid consumption system  100 . 
     The Z axis is an axis orthogonal to the XY plane. In the in-use state of the liquid consumption system  100 , a +Z axis direction is the vertical upward direction. Also, in the in-use state of the liquid consumption system  100 , a −Z axis direction is the vertical downward direction in  FIG. 1 . The −Z axis direction is also a direction in which the cartridges  120  are mounted in the printer  110 . Note that regarding the X, Y, and Z axes, the direction of an arrow indicates a + (positive) direction, and a direction opposite to the direction of the arrow indicates a − (negative) direction. Note that the above-described four cartridges  120  are aligned in an X axis direction. Therefore, the X axis direction can also be defined as a direction in which the four cartridges  120  are arranged. 
     The printer  110  has a carriage  9 , a recording head  11 , and a holder  12 . The carriage  9  is configured to be movable reciprocally along the X axis direction. The recording head  11  and the holder  12  are mounted in the carriage  9 . The recording head  11  that is an example of a liquid jetting head is positioned in the −Z axis direction of the carriage  9 . The holder  12  is positioned in the +Z axis direction of the carriage  9 . The holder  12  is configured such that a plurality of cartridges  120  can be mounted thereto. The cartridges  120  are detachably mounted in the holder  12 . The carriage  9  is connected to a timing belt  13 . Motive power from a motor  14  is transmitted to the carriage  9  via the timing belt  13 . Accordingly, the carriage  9  can move reciprocally along the X axis. 
     In addition, in the printer  110 , motive power from a conveyance motor (not illustrated) is transmitted to a conveyance roller  15 . The conveyance roller  15  extends along the X axis. In the printer  110 , the motive power from the conveyance motor causes the conveyance roller  15  to rotate, and thus a recording medium can be conveyed in a Y axis direction. 
     Ink in the cartridges  120  mounted in the holder  12  is supplied to the recording head  11 . Nozzles that are open toward the recording medium side are formed in the recording head  11 . Ink supplied from the cartridges  120  to the recording head  11  is discharged as ink droplets from the nozzle openings of the recording head  11  to the recording medium. 
     The printer  110  further has a control unit  16  for controlling the above-described mechanisms. The recording head  11  is connected to the control unit  16  via the flexible cable  17 . In the liquid consumption system  100  having the above configuration, recording is performed on a recording medium by discharging ink droplets from the recording head  11  at a predetermined position while conveying the recording medium in the Y axis direction and reciprocally moving the carriage  9  along the X axis. 
     The printer  110  has a detection unit  91 . The detection unit  91  is connected to the control unit  16 . The control unit  16  can detect the remaining state of ink in a cartridge  120  using the detection unit  91 . In this embodiment, a configuration is adopted in which the remaining state of ink in a cartridge  120  is optically detected. With this configuration, the detection unit  91  has an optical element. In this embodiment, as an example of the optical element, an optical sensor that has a light emitting element and a light receiving element is adopted. A method for detecting the remaining state of ink using the detection unit  91  will be described later. 
     Here, a direction along the X axis is not limited to a direction that is perfectly parallel to the X axis, and also includes a direction that is inclined relative to the X axis due to an error, a tolerance, or the like, excluding a direction perpendicular to the X axis. Similarly, a direction along the Y axis is not limited to a direction that is perfectly parallel to the Y axis, and also includes a direction that is inclined relative to the Y axis due to an error, a tolerance, or the like, excluding a direction perpendicular to the Y axis. A direction along the Z axis is not limited to a direction that is perfectly parallel to the Z axis, and also includes a direction that is inclined relative to the Z axis due to an error, a tolerance, or the like, excluding a direction perpendicular to the Z axis. That is to say, a direction along an axis or a plane is not limited to a direction that is perfectly parallel to this axis or plane, and also includes a direction that is inclined relative to this axis or plane due to an error, a tolerance, or the like, excluding a direction perpendicular to this axis or plane. 
       FIG. 2  is a perspective view of the holder  12 .  FIG. 3  is a perspective view showing a state where the cartridges  120  are mounted in the holder  12 . As shown in  FIG. 2 , the holder  12  has a recessed portion  21 . The cartridges  120  are mounted in the recessed portion  21  of the holder  12 . In this embodiment, four cartridges  120  can be accommodated in the recessed portion  21 . Mounting positions corresponding to the four cartridges  120  that are mounted in the recessed portion  21  are defined in the recessed portion  21 . The four mounting positions are aligned along the X axis, in the recessed portion  21 . Accordingly, the four cartridges  120  are accommodated in the recessed portion  21  in a state of being aligned along the X axis. As shown in  FIG. 3 , in this embodiment, a cartridge  121  that is mounted furthest on a −X axis direction side of the holder  12  has a width along the X axis direction larger than other cartridges  122 . Black ink is contained in the cartridge  121 , for example, and cyan, magenta, and yellow ink is respectively contained in the cartridges  122 , for example. 
     Four ink introduction needles  23  are provided in a bottom portion  22  in the recessed portion  21 . The ink introduction needles  23  are examples of a liquid introduction needle. The number of ink introduction needles  23  provided in the recessed portion  21  is the same as the number of cartridges  120  that can be mounted in the holder  12 . The four ink introduction needles  23  protrude from the bottom portion  22  in the +Z axis direction. The four ink introduction needles  23  are aligned along the X axis. Ink contained in the cartridges  120  is supplied from the ink introduction needles  23  to the printer  110 . In other words, ink contained in the cartridges  120  is supplied to the recording head  11  via the ink introduction needles  23 . 
     The holder  12  has a first side wall  25 , a second side wall  26 , a third side wall  27 , and a fourth side wall  28 . The first side wall  25 , the second side wall  26 , the third side wall  27 , and the fourth side wall  28  intersect the bottom portion  22 , and protrude from the bottom portion  22  in the +Z axis direction. 
     The first side wall  25  and the second side wall  26  oppose each other along the Y axis so as to sandwich the ink introduction needle  23 . The first side wall  25  is positioned in a −Y axis direction relative to the ink introduction needles  23 . Also, the second side wall  26  is positioned in a +Y axis direction relative to the ink introduction needles  23 . The third side wall  27  and the fourth side wall  28  oppose each other along the X axis so as to sandwich the ink introduction needles  23 . The third side wall  27  is positioned in a −X axis direction relative to the ink introduction needles  23 . Moreover, the fourth side wall  28  is positioned in a +X axis direction relative to the ink introduction needles  23 . The bottom portion  22  is surrounded by the first side wall  25 , the second side wall  26 , the third side wall  27 , and the fourth side wall  28 . The recessed portion  21  is defined accordingly. 
     Note that the bottom portion  22  and the side walls  25  to  28  are not limited to flat walls, and may include recessions and protrusions, or may include a curved surface. Also, the side walls  25  to  28  do not need to be orthogonal to the bottom portion  22 , and it suffices for those side walls to intersect the bottom portion  22 . Moreover, two surfaces intersecting each other indicate a positional relationship in which the two surfaces are not parallel to each other. In addition to a case where two surfaces are in direct contact with each other, a relationship in which an extension of one surface and an extension of the other surface intersect each other is also expressed as “intersecting” even in a case of a positional relationship in which the two surfaces are not in direct contact and are separated from each other. The angle formed by two intersecting surfaces may be any of a right angle, an obtuse angle, and an acute angle. 
     The holder  12  has engaging portions  33  and contact mechanisms  34 . The engaging portions  33  and the contact mechanisms  34  are provided in correspondence with the cartridges  120  that can be mounted in the holder  12 . Specifically, in this embodiment, the holder  12  has four engaging portions  33  and four contact mechanisms  34 . The four engaging portions  33  are aligned along the X axis direction. The four contact mechanisms  34  are aligned along the X axis. 
     The engaging portions  33  are provided on the first side wall  25 . The engaging portions  33  are provided in the edge portion in the +Z axis direction of the first side wall  25 . The engaging portions  33  protrude from the first side wall  25  in the +Y axis direction. The engaging portions  33  are each configured to be engageable with an engagement portion  54  of a cartridge  120  (see  FIG. 6 ). Mounting of the cartridge  120  to the holder  12  is achieved by engaging the engagement portion  54  of the cartridge  120  with the engaging portion  33  of the holder  12 . 
     The contact mechanisms  34  are provided on the first side wall  25 . On the first side wall  25 , the contact mechanisms  34  are positioned above the bottom portion  22 . The contact mechanisms  34  each have a plurality of on-the-apparatus-side pad-shaped terminals  35 . The plurality of terminals  35  on the apparatus-side have on-the-apparatus-side contact portions that are electrically connected to contact portions  58  of the cartridge  120  (see  FIG. 12 ). The contact portions  58  of the cartridge  120  are electrically connected to the control unit  16  of the printer  110  via the contact mechanism  34 . Note that in this embodiment, the terminals  35  on the apparatus-side are pad-shaped terminals, but may have any shape. For example, the terminals  35  on the apparatus-side may be pin-shaped terminals that extend from the bottom portion  22  along the first side wall  25  in the +Z axis direction, and have on-the-apparatus-side contact portions on the +Y axis direction side of the end portion on the +Z axis direction. 
     On the +X axis direction side and the −X axis direction side of the contact mechanism  34 , on-the-apparatus-side projections  36  protruding from the first side wall  25  on the +Y axis direction side are provided at positions sandwiching the contact mechanism  34 . The projections  36  on the apparatus-side are fitted in recesses  37  provided outward of protruding portions  70  (see  FIG. 12 ) provided in the cartridge  120 , and restrict movement in the X axis direction of the vicinity of the contact portions  58  of the cartridge  120 . This suppresses contact failure between the contact mechanism  34  and the contact portions  58  on the cartridge  120  side. 
     B. Configuration of Appearance of Cartridge 
       FIG. 4  is a bottom view of the cartridge  121 . As shown in  FIG. 4 , the cartridge  121  has a bottom wall portion  41 .  FIG. 4  illustrates a state where the cartridge  121  is seen in planar view in the +Z axis direction. 
       FIG. 5  is a plan view of the cartridge  121 . As shown in  FIG. 5 , the cartridge  121  has an upper wall portion  42 .  FIG. 5  illustrates a state where the cartridge  121  is seen in planar view in the −Z axis direction. 
       FIG. 6  is a left side view of the cartridge  121 . The cartridge  121  has a left wall portion  43  as shown in  FIG. 6 .  FIG. 6  illustrates a state where the cartridge  121  is seen in planar view in the +X axis direction. 
       FIG. 7  is a right side view of the cartridge  121 . The cartridge  121  has a right wall portion  44  as shown in  FIG. 7 .  FIG. 7  illustrates a state where the cartridge  121  is seen in planar view in the −X axis direction. 
       FIG. 8  is a rear view of the cartridge  121 . The cartridge  121  has a rear wall portion  45  as shown in  FIG. 8 .  FIG. 8  illustrates a state where the cartridge  121  is seen in the +Y axis direction in planar view. The rear wall portion  45  is also referred to as a “first wall portion”, and the bottom wall portion  41  ( FIG. 4 ) is also referred to as a “second wall portion”. 
       FIG. 9  is a front view of the cartridge  121 . The cartridge  121  has a front wall portion  46  as shown in  FIG. 9 .  FIG. 9  illustrates a state where the cartridge  121  is seen in the −Y axis direction in planar view. 
     The bottom wall portion  41 , the upper wall portion  42 , the left wall portion  43 , the right wall portion  44 , the rear wall portion  45 , and the front wall portion  46  of the cartridge  121  that have been described above are not limited to flat walls, and may include recessions and protrusions, or may include a curved surface. Also, the number of wall portions of the cartridge  121  is not limited to six, and may be constituted by more wall portions. In addition, the words “bottom”, “upper”, “left”, “right”, “rear”, and “front” are words for distinguishing the wall portions, and the directions of the wall portions do not have to correspond to the directions indicated by these words. 
     The bottom wall portion  41  and the upper wall portion  42  intersect the Z axis. The bottom wall portion  41  and the upper wall portion  42  oppose each other. The upper wall portion  42  is positioned in the +Z axis direction relative to the bottom wall portion  41 . The left wall portion  43  and the right wall portion  44  intersect the X axis. The left wall portion  43  and the right wall portion  44  oppose each other. The right wall portion  44  is positioned in the +X axis direction relative to the left wall portion  43 . The rear wall portion  45  and the front wall portion  46  intersect the Y axis. The rear wall portion  45  and the front wall portion  46  oppose each other. The front wall portion  46  is positioned in the +Y axis direction relative to the rear wall portion  45 . The bottom wall portion  41  and the upper wall portion  42  each intersect the left wall portion  43 , the right wall portion  44 , the rear wall portion  45  and the front wall portion  46 . The left wall portion  43  and the right wall portion  44  each intersect the rear wall portion  45  and the front wall portion  46 . 
     A liquid storage portion  47  (see  FIG. 6 ) is formed inside a region surrounded by the six wall portions  41  to  46  of the cartridge  121 . In the cartridge  121 , ink is contained in the liquid storage portion  47 . In other words, in the cartridge  121 , ink is contained inside the region surrounded by the wall portions  41  to  46 . 
     A lever  52  and a circuit substrate  53  are provided in the rear wall portion  45  ( FIG. 8 ). The lever  52  protrudes from the rear wall portion  45  in the −Y axis direction, and extends in the +Z axis direction. 
     The above-described engagement portion  54  is provided on the lever  52  (see  FIG. 7 ). The engagement portion  54  is formed in a portion of the lever  52  facing the opposite side to the rear wall portion  45  side, and protrudes toward the opposite side to the rear wall portion  45  side. Mounting of the cartridge  121  to the holder  12  is achieved by engaging the end portion in the +Z axis direction of the engagement portion  54  with the end portion in the −Z axis direction of the engaging portion  33  ( FIG. 2 ) of the holder  12 . Accordingly, as a result of the end portion in the +Z axis direction of the engagement portion  54  being engaged with the end portion in the −Z axis direction of the engaging portion  33 , displacement of the cartridge  121  relative to the carriage  9  can be restricted. In addition, the cartridge  121  can be removed from the holder  12  by releasing engagement between the engagement portion  54  of the lever  52  and the engaging portion  33  of the holder  12  in a state where mounting of the cartridge  121  to the carriage  9  is complete. Mounting/dismounting of the cartridge  121  to/from the carriage  9  is achieved in this manner. 
     An atmospheric air opening port  66 , a liquid supply portion  51  and a unit for detection  92  are provided on the bottom wall portion  41  ( FIG. 4 ). The atmospheric air opening port  66  is an opening for introducing atmospheric air into the liquid storage portion  47 . The atmospheric air opening port  66  will be described later in detail. 
     On the bottom wall portion  41 , the liquid supply portion  51  is provided at a position close to an edge side S 1  ( FIG. 8 ) of the rear wall portion  45 . Ink in the liquid storage portion  47  in the cartridge  121  is supplied to the ink introduction needle  23  ( FIG. 2 ) of the holder  12  via the liquid supply portion  51 . The liquid supply portion  51  is a known liquid supply mechanism configured by housing, in a cylindrical supply port  65  formed in the bottom wall portion  41 , an annular sealing member into which the ink introduction needle  23  is inserted, a valve body that can come into contact with the sealing member and is pressed up by the ink introduction needle  23 , and a spring member that biases the valve body toward the sealing member. 
     The unit for detection  92  has an optical part. In this embodiment, a prism  93  (see  FIG. 10 ) is adopted as an example of the optical part. The unit for detection  92  penetrates the bottom wall portion  41 , and is embedded in the liquid storage portion  47 . In addition, in this embodiment, window portions  95  ( FIG. 2 ) are formed in the holder  12 . The window portions  95  are each formed at a position overlapping the unit for detection  92  of the cartridge  121  along the Z axis in a state where the cartridge  121  is mounted in the holder  12 . The detection unit  91  shown in  FIG. 1  is provided at a position overlapping a locus of the unit for detection  92  when the carriage  9  is moved along the X axis. An Ink detection process is then carried out at a position at which the unit for detection  92  and the detection unit  91  overlap each other along the Z axis. 
       FIG. 10  is an explanatory view showing the concept of an ink detection process. When detection processing is carried out, a light beam  96  from the light emitting element of the detection unit  91  is incident to the unit for detection  92  via the window portion  95  as shown in  FIG. 10 . At this time, if the liquid level of ink in the liquid storage portion  47  is higher than reflective faces  97 , the light beam  96  that is incident in the prism  93  exits the prism  93  from the reflective faces  97 . Therefore, if the liquid level of ink in the liquid storage portion  47  is higher than the reflective faces  97 , the light receiving element of the detection unit  91  cannot detect light. In this case, the control unit  16  of the printer  110  determines that there is ink. On the other hand, if the liquid level of ink in the liquid storage portion  47  is lower than the reflective faces  97 , the light beam  96  that is incident in the prism  93  is reflected off the reflective faces  97  and then exits the prism  93  toward the detection unit  91 . Therefore, if the liquid level of ink in the liquid storage portion  47  is lower than the reflective faces  97 , the light receiving element of the detection unit  91  can detect light. In this case, the control unit  16  of the printer  110  determines that there is no ink. 
       FIG. 11  is a perspective view of the cartridge  121 .  FIG. 12  is an enlarged view of a region A in  FIG. 11 .  FIG. 13  is an enlarged view of the circuit substrate  53 . As shown in  FIG. 13 , the cartridge  121  has a plurality of contact portions  58 . The contact portions  58  are provided on the rear wall portion  45  (the first wall portion). In this embodiment, the circuit substrate  53  with a plurality of terminals  57  is provided on the rear wall portion  45 , and the contact portions  58  are respectively configured as portions of the regions of the terminals  57 . The contact portions  58  come into contact with the terminals  35  on the apparatus-side ( FIG. 2 ) provided in the printer  110  in a state where the cartridge  121  is mounted in the printer  110 . The terminals  57  or the contact portions  58  may be directly provided on the rear wall portion  45  instead of the circuit substrate  53 . In this embodiment, the circuit substrate  53  is fixed to the cartridge  121  by respectively fitting columnar projections (bosses)  73  and  74  provided on the rear wall portion  45 , into a boss hole  71  and a boss groove  72  provided on the circuit substrate  53 , and heat caulking at least one of the projections  73  and  74 . Note that the circuit substrate  53  may be fixed to the cartridge  121  using an adhesive. 
     At least one of the terminals  57  is electrically connected to a storage (not illustrated) provided on the back face of the circuit substrate  53 . In a state where the cartridge  121  is mounted in the holder  12 , the storage provided on the circuit substrate  53  of the cartridge  121  and the control unit  16  of the printer  110  ( FIG. 1 ) are electrically connected to each other via a contact portion  58 . Accordingly, various types of information is exchanged between the storage provided to the circuit substrate  53  of the cartridge  121  and the control unit  16  of the printer  110 . 
     As shown in  FIGS. 8 and 11 , the rear wall portion  45  is substantially rectangular in planar view, and has a plurality of edge sides S 1 , S 2 , S 3 , and S 4  that constitute the outer periphery of the rear wall portion  45 . The edge side S 1  (first edge side S 1 ) opposes the edge side S 2  (second edge side S 2 ) in the Z axis direction, and the edge side S 3  opposes the edge side S 4  in the X axis direction. The circuit substrate  53  is provided at a position closer to the first edge side S 1  out of the first edge side S 1  and the second edge side S 2 . In other words, the contact portions  58  are provided at positions closer to the first edge side S 1 . The first edge side S 1  is a side along the X axis direction, furthest on the −Z axis direction side of the rear wall portion  45 . Note that in a case where recessions and protrusions directed in the −Z axis direction exist in the edge portion on the −Z axis direction of the rear wall portion  45 , the first edge side S 1  is a virtual straight line that is in contact with a portion protruding furthest in the −Z axis direction, and runs along the X axis direction (see  FIG. 13 ). Similarly, in a case where recessions and protrusions directed in the +Z axis direction exist in the edge portion on the +Z axis direction of the rear wall portion  45 , the second edge side S 2  is a virtual straight line that is in contact with a portion protruding furthest in the +Z axis direction, and runs along the X axis direction. 
     As shown in  FIG. 13 , at least some of the contact portions  58  forms at least one row arranged along the first edge side S 1 . In this embodiment, the contact portions  58  form two rows R 1  and R 2  along the first edge side S 1 . The cartridge  121  has the protruding portions  70  that are outward, in the X axis direction, of outer contact portions  58 A, which are the outermost contact portions  58  in the rows R 1  and R 2 . In this embodiment, one of the protruding portions  70  is provided outward, in the −X axis direction, of the outer contact portion  58 A on the −X axis direction side, and the other protruding portion  70  is provided outward, in the +X axis direction, of the outer contact portion  58 A on the +X axis direction side. Accordingly, in this embodiment, the two protruding portions  70  are provided at positions sandwiching all of the contact portions  58  in the X axis direction. In this embodiment, two protruding portions  70  are provided, but one or three or more protruding portions  70  may be provided. In the case of providing only one protruding portion  70 , the protruding portion  70  is preferably provided on a wall portion side closer to the contact portions  58  (in this embodiment, on the right wall portion  44  side), among the left wall portion  43  and the right wall portion  44  that intersect the rear wall portion  45 . Note that in this embodiment, the contact portions  58  form the two rows R 1  and R 2  along the first edge side S 1 , but any number of rows may be formed, and only one row, namely the row R 1  may be formed, for example. In addition, for example, some of the contact portions  58  of the row R 1  shown in  FIG. 13  may form a row. Specifically, the position of some of the contact portions  58  of the row R 1  may be shifted in the +Z axis direction or the −Z axis direction, for example. 
     The protruding portions  70  are provided between end portions  58 T on the first edge side S 1  side of the outer contact portions  58 A and the first edge side S 1 , in a direction from the first edge side S 1  toward the rows R 1  and R 2 . Accordingly, the protruding portions  70  are provided between the end portions  58 T in the −Z axis direction of the outer contact portions  58 A and the first edge side S 1 , in the Z axis direction. Also, in this embodiment, the protruding portions  70  are provided between the terminals  57  furthest on the −Z axis direction side and the first edge side S 1 , in the Z axis direction. In addition, in this embodiment, the protruding portions  70  are provided between the circuit substrate  53  and the first edge side S 1 . Note that, as long as the protruding portions  70  are provided between the end portions  58 T on the −Z axis direction side of the outer contact portions  58 A and the first edge side S 1 , the shape of the protruding portions  70  is not limited to the shape in this embodiment, and may be a shape extending to a position overlapping at least one of the terminals  57  of the circuit substrate  53  in the Z axis direction, for example, or another shape. 
     Furthermore, in this embodiment, as shown in  FIG. 12 , the protruding portions  70  protrude past the contact portions  58 . More specifically, the protruding portions  70  protrude on the −Y axis direction side relative to the contact portions  58 . 
     In this embodiment, the protruding portions  70  are substantially rectangular parallelepiped. In this embodiment, the protruding portions  70  are formed by raising a portion of the rear wall portion  45 . However, the protruding portions  70  may be formed by raising, in the −Y axis direction, a portion of the edge portion in the −Y axis direction of the right wall portion  44  that is a wall intersecting the rear wall portion  45 , for example. In addition, constituent elements that constitute the protruding portions  70  may be attached to the cartridge  121 . 
       FIG. 14  is a diagram for illustrating an effect in this embodiment.  FIG. 15  is an enlarged view of a region C in  FIG. 14 .  FIG. 16  is a diagram showing a comparison example. As shown in  FIG. 14 , in a case where the cartridge  121  is dropped onto a fall surface FS from a corner thereof, an impact load is input intensively from the corner, and thus if a constituent part is arranged in the vicinity of the corner, there is a possibility that the constituent part will be damaged or break. Therefore, if the protruding portions  70  are not provided at a corner as in the comparison example shown in  FIG. 16 , the circuit substrate  53  will come into direct contact with the fall surface FS, and there is the possibility that the circuit substrate  53  and the terminals  57  provided on the circuit substrate  53  or the contact portions  58  will be damaged or break. However, in this embodiment, the protruding portions  70  are provided in the vicinity of a corner of the cartridge  121  as shown in  FIG. 15 , and thus the circuit substrate  53  will not come into direct contact with the fall surface FS. Therefore, according to this embodiment, it is possible to mitigate the impact on the cartridge  121  when the cartridge  121  is dropped, hits another object, or the like, and suppress damage or breakage of the circuit substrate  53 , the terminals  57 , and the contact portions  58  that are constituent parts constituting the cartridge  121 . In addition, according to this embodiment, it is also possible to suppress damage or breakage of the joint portion between the circuit substrate  53  and the cartridge  121 . In particular, the cartridge  121  is filled with a larger amount of ink than the cartridge  122 , and thus impact transmitted to the cartridge  121  is likely to be large when the cartridge  121  is dropped. Therefore, an effect of mitigating impact using the protruding portions  70  becomes particularly significant. 
     In addition, in this embodiment, as shown in  FIGS. 12 and 13 , the protruding portions  70  are provided outward of the contact portions  58  in the X axis direction, and thus it is possible to suppress contact of the protruding portions  70  with the terminal  35  on the apparatus-side provided in the holder  12  when mounting the cartridge  121  to the holder  12  from the +Z axis direction in the −Z axis direction. Therefore, the cartridge  121  can be smoothly mounted to the holder  12 . In addition, it is possible to suppress contact of the protruding portions  70  with the terminal  35  on the apparatus-side when mounting the cartridge  12 , and thus it is possible to suppress chipping of the protruding portions  70  due to the terminal  35  on the apparatus-side when mounting the cartridge  12 . Therefore, the adherence of shavings of the protruding portions  70  to the contact portions  58  is suppressed. Therefore, it is possible to suppress the occurrence of contact failure between the terminal  35  on the apparatus-side and the contact portions  58 . In addition, in this embodiment, the protruding portions  70  are provided outward of the circuit substrate  53  in the X axis direction, and thus, in a case where the cartridge  121  falls on the right wall portion  44  or the left wall portion  43 , it is possible to suppress the circuit substrate  53  from directly hitting the fall surface FS. Furthermore, in this embodiment, the protruding portions  70  are not provided over the entire outer periphery of the circuit substrate  53 , and thus the assemblability of the circuit substrate  53  to the cartridge  121  is not hampered by the protruding portions  70 . 
     In addition, according to this embodiment, the protruding portions  70  protrude past the contact portions  58  in the −Y axis direction, and thus it is possible to more effectively mitigate the impact on the contact portions  58 . Note that the height of the protruding portions  70  may be the same as that of the contact portions  58 . Also with such a configuration, it is possible to reduce the possibility that the circuit substrate  53  or the contact portions  58  will come into direct contact with the fall surface FS and be damaged or break in a case where the cartridge  121  is dropped on a corner thereof. 
     In addition, in this embodiment, the liquid supply portion  51  is provided in the bottom wall portion  41 , and the liquid supply portion  51  is provided at a position on the edge side S 1  side of the bottom wall portion  41 . Accordingly, in this embodiment, at a position in the rear wall portion  45  close to the right wall portion  44  and the bottom wall portion  41 , the liquid supply portion  51 , the contact portions  58  and the protruding portions  70  are provided at positions close to each other. Therefore, for example, even if the sizes in the X axis direction and the Z axis direction of the cartridge  121  are changed in order to change the ink capacity of the cartridge  121 , the positions of the liquid supply portion  51 , the contact portions  58 , and the protruding portions  70  do not need to be changed. Therefore, the mounting compatibility of the cartridge  121  to the printer  110  can be easily maintained. As a result, for example, the structure in a region B enclosed using a broken line in  FIG. 11  can be shared by the cartridge  121  and the cartridge  122 . 
     C. Internal Configuration of Cartridge 
       FIG. 17  is a perspective view showing the internal structure on the left wall portion  43  side of the cartridge  121 .  FIG. 18  is a diagram showing the internal structure on the left wall portion  43  side of the cartridge  121 . Hereinafter, the left wall portion  43  side of the cartridge  121  is referred to as a “front side”. 
     A Rib  130  having various shapes is formed on the front side of the cartridge  121 . A film  68 A (see  FIG. 20 ) that covers the entire front side of the cartridge  121  is welded to the front side of the cartridge  121 , and a lid member (not illustrated) is then attached to the cartridge  121  over the film  68 A, whereby the left wall portion  43  is formed. Note that the lid member may be omitted. Chambers such as an atmospheric air chamber  131 , a first tank chamber  132 , a second tank chamber  133 , and a third tank chamber  134 , which will be described later, are sectioned and formed in the cartridge  121  by welding the film  68 A to the edge faces on the front side of the bottom wall portion  41 , the upper wall portion  42 , the rear wall portion  45 , and the front wall portion  46 , as well as the edge faces on the front side of the rib  130 . As shown in  FIG. 17 , the first tank chamber  132 , the second tank chamber  133 , and the third tank chamber  134  constitute the above-described liquid storage portion  47 . In  FIG. 18 , thick black lines are used to indicate portions to which the film  68 A is welded. Note that in addition to a film covering the entirety front side of the cartridge  121 , a film (not illustrated) that only sections and forms a prism chamber  135  is separately welded to the prism chamber  135  shown in  FIG. 18 . The unit for detection  92  (the prism  93 ) is arranged on the bottom portion of the prism chamber  135 . 
       FIG. 19  is a diagram showing the internal structure on the right wall portion  44  side of the cartridge  121 . Hereinafter, the right wall portion  44  side of the cartridge  121  is referred to as a “back side”. 
     A plurality of grooves are formed on the back side of the cartridge  121 . By welding a film  68 B (see  FIG. 20 ) to the back side of the cartridge  121 , these grooves form a meandering path  153 , a gas-liquid separation chamber  151  and communication paths, which will be described later, between the cartridge  121  and the film  68 B. In  FIG. 19 , thick black lines are used to indicate portions to which the film  68 B is welded. 
     A differential pressure chamber  150  and the gas-liquid separation chamber  151  are formed on the back side of the cartridge  121 . The differential pressure chamber  150  accommodates a known differential pressure mechanism (not illustrated) including a valve member and a spring. A bank  152  is formed in the internal walls that surround the bottom face of the gas-liquid separation chamber  151 , and a gas-liquid separation film (not illustrated) is attached to the bank  152 . 
       FIG. 20  is a cross-sectional view along XX-XX in  FIG. 18 . A groove  136  is provided in the lowest bottom portion of the third tank chamber  134  formed on the front side of the cartridge  121 . This groove is referred to as a “residue prevention groove  136 ”. The residue prevention groove  136  is provided in order to prevent ink from remaining in the liquid storage portion  47 . In this embodiment, one residue prevention groove  136  is provided in the bottom portion of the third tank chamber  134 . The bottom face of the residue prevention groove  136  is substantially horizontal. In addition, when the residue prevention groove  136  is viewed from the +Z axis direction side, the shape of a flow path of the residue prevention groove  136  is a straight line. In addition, a cross-sectional shape of the residue prevention groove  136  is rectangular. 
       FIG. 21  is a diagram showing a flow of atmospheric air in the cartridge  121 . Hereinafter, first, a flow of atmospheric air that flows into the cartridge  121  will be described with reference to  FIGS. 18, 19, and 21  prior to a flow of ink in the cartridge  121 . Atmospheric air flows in the cartridge  121  generally through the atmospheric air opening port  66 , the meandering path  153 , the gas-liquid separation chamber  151 , the atmospheric air chamber  131 , and the first tank chamber  132  in the stated order. 
     Atmospheric air introduced from the atmospheric air opening port  66  ( FIG. 19 ) enters, through the meandering path  153  provided on the back side of the cartridge  121 , the gas-liquid separation chamber  151  provided in an upper portion of the back side of the cartridge  121 . The meandering path  153  is formed to meander and to be thin and long such that the distance from the atmospheric air opening port  66  to the liquid storage portion  47  is long. Accordingly, it is possible to suppress the evaporation of water in ink in the liquid storage portion  47 . The gas-liquid separation chamber  151  allows the penetration of atmospheric air from the meandering path  153  to the liquid storage portion  47 , using the function of a gas-liquid separation film (not illustrated) provided therein, but does not allow the penetration of ink from the liquid storage portion  47  to the meandering path  153 . Therefore, the gas-liquid separation chamber  151  suppresses the flow of ink that has flowed backward from the liquid storage portion  47  upstream, to the upstream side of the gas-liquid separation chamber  151 . 
     The gas-liquid separation chamber  151  is in communication with the first tank chamber  132  ( FIG. 18 ) provided on the front side of the cartridge  121 , through several chambers and communication paths provided on the back side and the front side of the cartridge  121 . Specifically, atmospheric air introduced through the gas-liquid separation chamber  151  enters, from an opening  151   h  ( FIG. 19 ) provided in the gas-liquid separation chamber  151 , a first spare atmospheric air chamber  170  ( FIG. 18 ) provided above the first tank chamber  132  of the front side of the cartridge  121 , and enters, from an opening  170   h  provided in the first spare atmospheric air chamber  170 , the end portion on the +Y axis direction side of a first communication path  171  ( FIG. 19 ) provided above the differential pressure chamber  150  on the back side of the cartridge  121  and extending in the Y axis direction. Furthermore, the atmospheric air then enters, from an opening  171   h  provided in the end portion on the −Y axis direction side of the first communication path  171 , a second spare atmospheric air chamber  172  ( FIG. 18 ) provided at the corner at which the rear wall portion  45  on the front side of the cartridge  121  and the upper wall portion  42  intersect. The atmospheric air then enters, from an opening  172   h  provided in the second spare atmospheric air chamber  172 , the end portion on the −Y axis direction side of a second communication path  173  ( FIG. 19 ) that is provided above the first communication path  171  on the back side of the cartridge  121 , and from an opening  173   h  provided in the end portion on the +Y axis direction side of the second communication path  173  that extends in the Y axis direction and is shorter than the first communication path  171 , an upper portion of the atmospheric air chamber  131  ( FIG. 18 ) provided along the rear wall portion  45  of the front side of the cartridge  121 . 
     The atmospheric air in the atmospheric air chamber  131  enters, through an opening  131   h  provided in a lower portion of the atmospheric air chamber  131 , the end portion on the −Y axis direction side and the −Z axis direction side of a third communication path  174  ( FIG. 19 ) provided on the back side of the cartridge  121 , and flows into the first tank chamber  132  ( FIG. 18 ) provided on the front side of the cartridge  121 , through an opening  174   h  provided in the end portion on the +Y axis direction side and the +Z axis direction side of the third communication path  174 . As the ink in the liquid storage portion  47  is consumed, atmospheric air accordingly flows into the liquid storage portion  47  through the opening  174   h  provided in the first tank chamber  132 . 
       FIG. 22  is a diagram showing the flow of ink in the cartridge  121 . In the cartridge  121 , ink generally flows through the first tank chamber  132 , the second tank chamber  133 , the third tank chamber  134 , the residue prevention groove  136 , the prism chamber  135 , the differential pressure chamber  150 , and the liquid supply portion  51  in the stated order. The flow of ink in the cartridge  121  will be described in detail below with reference to  FIGS. 18 and 19 . 
     Ink in the first tank chamber  132  ( FIG. 18 ) enters, from an opening  132   h  provided in the bottom portion of the first tank chamber  132 , the end portion on the −Y axis direction side of a fourth communication path  175  ( FIG. 19 ) extending in the Y axis direction on the back side of the cartridge  121 , and enters, from an opening  175   h  provided in the end portion on the +Y axis direction side of the fourth communication path  175 , a lower portion on the −Y axis direction side of the second tank chamber  133  ( FIG. 18 ) provided on the front side of the cartridge  121 . Ink in the second tank chamber  133  enters, through a slit  133   s  provided in the end portion on the +Y axis direction side of the rib  130  constituting the bottom wall of the second tank chamber  133 , a fifth communication path  176  provided below the second tank chamber  133  and extending in the Y axis direction. The ink that has entered the fifth communication path  176  enters, through an opening  176   h  provided in the end portion on the −Y axis direction side of the fifth communication path  176 , the end portion on the +Z axis direction side and the −Y axis direction side of a sixth communication path  177  ( FIG. 19 ) provided on the back side of the cartridge  121 . The ink that has entered the sixth communication path  177  enters, through an opening  177   h  provided in the end portions on the −Z axis direction side and the +Y axis direction side of the sixth communication path  177 , the vicinity of the end portion in the +Y axis direction of the third tank chamber  134  ( FIG. 18 ) provided on the front side of the cartridge  121 . The third tank chamber  134  is arranged on the −Z axis direction side relative to the first tank chamber  132  and the second tank chamber  133 . 
     The third tank chamber  134  has the largest space in the liquid storage portion  47 . The liquid storage portion  47  is divided into three spare chambers  134 A,  134 B and  134 C ( FIG. 17 ) by the two ribs  130 A and  130 B that extend along the Z direction. The three spare chambers  134 A,  134 B and  134 C are aligned from the −Y axis direction toward the +Y axis direction in the stated order. The three spare chambers  134 A,  134 B and  134 C are in communication with each other via slits provided in the upper ends and the lower ends of the ribs  130 A and  130 B. The residue prevention groove  136  shown in  FIG. 20  is provided in the bottom portion of the spare chamber  134 B at the center among these spare chambers. In addition, the prism chamber  135  ( FIG. 18 ) is arranged on the back side (the +X axis direction side) of the spare chamber  1346 . The bottom faces of the spare chamber  1346  and the spare chamber  134 C are substantially horizontal, while the bottom face of the spare chamber  134 A that is farthest from the opening  177   h  from which ink is introduced is inclined downward toward the residue prevention groove  136  provided in the spare chamber  134 B. Therefore, ink remaining in the spare chamber  134 A is suppressed. Note that the bottom portions of the spare chamber  134 B and the spare chamber  134 C may also be inclined downward toward the residue prevention groove  136 . In addition, in this embodiment, as shown in  FIG. 20 , a bottom portion  134 L of the third tank chamber  134  is inclined downward toward the film  68 A welded to the front side of the cartridge  121 . Therefore, it is possible to allow ink in the third tank chamber  134  to effectively flow to the residue prevention groove  136 . 
     The ink in the third tank chamber  134  enters, through the residue prevention groove  136 , the end portions on the −Z axis direction side and the −Y axis direction side of a seventh communication path  178  ( FIG. 19 ) provided on the rear side of the cartridge  121 . The ink that has entered the seventh communication path  178  enters, through an opening  178   h  provided in the end portions on the +Z axis direction side and the +Y axis direction side of the seventh communication path  178 , an upper portion of the prism chamber  135  ( FIG. 18 ) on the front side of the cartridge  121 . A plurality of ribs for trapping air bubbles included in the ink in the prism chamber  135  are provided in the prism chamber  135 . 
     The ink in the prism chamber  135  travels downward in the prism chamber  135  in the −Z axis direction, and comes into contact with the surface of the prism  93  ( FIG. 10 ), and after that, enters, through an opening  135   h  ( FIG. 19 ) provided in a lower portion of the back side of the prism chamber  135 , the end portion on the −Y axis direction side of an eighth communication path  179  that is provided on the back side of the cartridge  121 , and extends in the Y axis direction. The ink that has entered the eighth communication path  179  enters, through an opening  179   h  provided in the end portion on the +Y axis direction side of the eighth communication path  179 , the end portion on the +Y axis direction side of a ninth communication path  180  ( FIG. 18 ) that is provided on the front side of the cartridge  121 , and extends in the Y axis direction. The ink that has entered the ninth communication path  180  enters, through an opening  180   h  provided in the end portion on the −Y axis direction side of the ninth communication path  180 , the end portions on the −Z axis direction side and the +Y axis direction side of a tenth communication path  181  ( FIG. 19 ) provided in the back side of the cartridge  121 . The ink that has entered the tenth communication path  181  enters, through an opening  181   h  that is provided in the end portions on the +Z axis direction side of the −Y axis direction side of the tenth communication path  181 , and is adjacent to the differential pressure chamber  150 , the end portions on the +Z axis direction side and the +Y axis direction side of an 11 th  communication path  182  ( FIG. 18 ) provided on the front side of the cartridge  121 . The ink that has entered the 11 th  communication path  182  enters, through an opening  182   h  provided in the end portions on the −Z axis direction side and the −Y axis direction side of the 11 th  communication path  182 , the differential pressure chamber  150  ( FIG. 19 ) provided on the back side of the cartridge  121 . 
     A valve member (not illustrated) in the differential pressure chamber  150  is configured to open when the pressure on the liquid supply portion  51  side drops, and close when the pressure rises. When ink is jetted from the recording head  11  and the pressure on the liquid supply portion  51  is lowered, the valve member opens, and ink in the 11th communication path  182  upstream of the differential pressure chamber  150  enters, through an opening  150   h  provided in the differential pressure chamber  150 , a 12 th  communication path  183  ( FIG. 18 ) provided on the front side of the cartridge  121  and extending in the Z axis direction. The ink that has entered the 12 th  communication path  183  reaches, through an opening  183   h  provided at the end portion on the −Z axis direction side of the 12th communication path  183 , the liquid supply portion  51 . 
     As shown in  FIGS. 17 and 18 , in this embodiment, the liquid storage portion  47  has a lateral rib  191  conforming to the bottom wall portion  41 . Specifically, in the second tank chamber  133  arranged at a corner at which the front wall portion  46  and the upper wall portion  42  of the cartridge  121  intersect, the lateral rib  191  that extends from the end portion in the −Y axis direction of the second tank chamber  133  to the end portion in the +Y axis direction is provided along the Y axis direction. The lateral rib  191  is provided in the center portion of the second tank chamber  133  in the Z axis direction. In addition, in this embodiment, the liquid storage portion  47  has lengthwise ribs  192  along the rear wall portion  45 . Specifically, in the second tank chamber  133 , two lengthwise ribs  192  extending from the end portion in the +Z axis direction of the second tank chamber  133  to the end portion in the −Z axis direction are provided along the Z axis direction. The two lengthwise ribs  192  are arranged to be aligned in the Y axis direction and intersect the lateral rib  191 . At least one of a lateral rib  191  and a lengthwise rib  192  is also referred to as a “peeling prevention rib”. In this embodiment, the lateral rib  191  and the lengthwise ribs  192  are not welded to the film  68 A that is welded to the entire front side of the cartridge  121 . In addition, the lateral rib  191  and the lengthwise ribs  192  are formed to have a height along the X axis direction lower than the other rib  130 , so as to not come in contact with the film  68 A. In other words, the height (length) along the X axis direction of the lateral rib  191  and the lengthwise ribs  192  is larger than the distance from the edge faces in the −X axis direction of the lateral rib  191  and the lengthwise ribs  192  to the film  68 A. 
     Rectangular slits  191   s  for circulating ink in the Z axis direction are provided in the edge portions in the −X axis direction of a portion of the lateral rib  191  that is in contact with the front wall portion  46  and portions of the lateral rib  191  that are in contact with the lengthwise ribs  192 . In addition, rectangular slits  192   s  for circulating ink in the Y axis direction are also provided in the end portion in the +Z axis direction and the end portion in the −Z axis direction of each of the lengthwise ribs  192 . The distance from the edge faces in the −X axis direction of the lateral rib  191  and the lengthwise rib  192  to the film  68 A is smaller than the distance from the edge faces in the −X axis direction of the slits  191   s  and  192   s  to the film  68 A. 
     According to the cartridge  121  of this embodiment, the lateral rib  191  and the lengthwise ribs  192  are provided in the second tank chamber  133 , and thus in cases such as where the cartridge  121  is dropped, the lateral rib  191  and the lengthwise ribs  192  receive the movement of ink in the second tank chamber  133 , and suppress rapid movement of the ink. Therefore, impact on the welding portion between the rib  130  that sections the second tank chamber  133  and the film  68 A as ink moves is mitigated. As a result, it is possible to suppress peeling of the film  68 A from the rib  130 . 
     In particular, the cartridge  121  of this embodiment is internally partitioned into the tank chambers  132 , 133  and  134 , and the volume of the third tank chamber  134  that is positioned at the lowest position among those chambers is the largest. Therefore, more ink is contained on the liquid supply portion  51  side provided in a lower portion of the cartridge  121 , the weight on the liquid supply portion  51  side is larger, and thus there is a high risk that the cartridge  121  will fall on the liquid supply portion  51  side. If the cartridge  121  falls on the liquid supply portion  51  side, a large amount of ink will flow backward through communication paths upon being dropped, and ink moves toward the second tank chamber  133  that is at a position opposite to the liquid supply portion  51 . At this time, in this embodiment, the lateral rib  191  is provided inside the second tank chamber  133 , and thus impact caused by this movement of ink is suppressed, and it is possible to suppress peeling, from the rib  130 , of the film  68 A that sections and forms the second tank chamber  133 . 
     In addition, in this embodiment, the height (length) in the X axis direction of the lateral rib  191  is longer than the distance from the edge face in the −X axis direction of the lateral rib  191  to the film  68 A, and thus when the cartridge  121  falls, movement of ink in the gravity direction can be effectively received. In addition, in this embodiment, the space from edge face in the −X axis direction of the lateral rib  191  to the film  68 A is smaller than the distance from the edge face in the −X axis direction of the slits  191   s  provided on the lateral rib  191  to the film  68 A, and thus when the cartridge  121  falls, the movement of ink in the gravity direction can be effectively received. 
     In addition, in this embodiment, the lateral rib  191  and the lengthwise ribs  192  are not joined to the film  68 A. Therefore, it is possible to suppress tearing of the film  68 A from these joint portions in a case where ink is frozen and is inflated, for example. In addition, in this embodiment, the lateral rib  191  and the lengthwise ribs  192  are not in contact with the film  68 A. Therefore, during a process of welding the film  68 A to the rib  130 , it is possible to suppress erroneous welding of the film  68 A to the lateral rib  191  and the lengthwise ribs  192 . In addition, the lateral rib  191  and the lengthwise ribs  192  are not in contact with the film  68 A, and thus when depressurizing the entire cartridge  121  at the time of shipping the cartridge  121 , the film  68 A can be supported without any stress using the lateral rib  191  and the lengthwise ribs  192 . 
     D. Modified Examples 
     Modified Example 1 
     In the above embodiment, one residue prevention groove  136  is provided in the bottom portion of the third tank chamber  134 . However, any number of residue prevention grooves  136 , and any shape and arrangement location of the residue prevention groove  136  may be adopted. For example, two or more residue prevention grooves  136  may be provided, and may be provided in a tank chamber other than the third tank chamber  134 . In addition, a cross-sectional shape of the residue prevention groove  136  may be rectangular, and may be partially curved. In addition, when viewed from the +Z axis direction side, the residue prevention groove  136  may be straight or curved. In addition, the bottom face of the residue prevention groove  136  may be horizontal, and may be inclined so as to be deeper toward the seventh communication path  178  which is connected thereto. In addition, the residue prevention groove  136  may be configured as a thin groove through which ink is made to flow through capillary action. 
     Modified Example 2 
     In the above embodiment, both the lateral rib  191  and the lengthwise ribs  192  are provided in the second tank chamber  133 . However, the lateral rib  191  or one of the lengthwise ribs  192  may be omitted. In addition, in the second tank chamber  133 , a plurality of lateral ribs may be provided so as to be aligned in the Z axis direction, and one or three or more lengthwise ribs may be provided so as be aligned in the Y axis direction. 
     Modified Example 3 
     In the above embodiment, the lateral rib  191  and the lengthwise ribs  192  are provided in the second tank chamber  133  arranged at a position in the corner opposite to the liquid supply portion  51 . However, the lateral rib  191  and at least one of the lengthwise ribs  192  may be provided in at least one of the first tank chamber  132 , the second tank chamber  133 , and the third tank chamber  134 . 
     Modified Example 4 
     In the above embodiment, the lateral rib  191  and the lengthwise ribs  192  are not welded to the film  68 A. However, the film  68 A may be welded to the lateral rib  191  and at least one of the lengthwise ribs  192 . In addition, the lateral rib  191  and at least one of the lengthwise ribs  192  may simply come into contact with the film  68 A without being welded. 
     Modified Example 5 
     In the above embodiment, the lateral rib  191  is provided along the Y axis direction. However, as long as movement of ink in the gravity direction can be prevented, the lateral rib  191  may be inclined relative to the Y axis direction within the range of ±15°, for example. In addition, the position of the lateral rib  191  is not limited to the center in the Z axis direction of the second tank chamber  133 , and may be arranged at a position close to one of the end portions in the Z axis direction. 
     Modified Example 6 
     In the above embodiment, the distance from the edge face in the −X axis direction of the lateral rib  191  and the lengthwise ribs  192  to the film  68 A is shorter than the depth along the Z axis direction of the slits  191   s  and  192   s  provided in the lateral rib  191  and the lengthwise ribs  192 . However, the distance from the edge face in the −X axis direction of the lateral rib  191  and the lengthwise ribs  192  to the film  68 A may be longer than the depth along the Z axis direction of the slits  191   s  and  192   s  provided in the lateral rib  191  and the lengthwise ribs  192 . 
     Modified Example 7 
     In the above embodiment, the liquid supply portion  51  is provided on the bottom wall portion  41 . However, the liquid supply portion  51  may be provided on any of the left wall portion  43 , the right wall portion  44 , and the front wall portion  46 . 
     Modified Example 8 
     The invention is not limited to an inkjet printer and a cartridge thereof, and can also be applied to any liquid consumption apparatus that consumes a liquid other than ink and a cartridge (liquid container) used for such a liquid consumption apparatus. For example, the invention can be applied as a cartridge used for various liquid ejection apparatuses as follows:
         1. an image recording apparatus such as a facsimile apparatus,   2. a color material ejection apparatuses used for manufacturing color filters for an image display device such as a liquid crystal display,   3. an electrode material ejection apparatuses used for forming electrodes for an organic EL (Electro Luminescence) display, an FED (Field Emission Display), and the like,   4. a liquid ejection apparatus that ejects a liquid containing biological organic matter used for manufacturing biochips,   5. a sample ejection apparatus serving as a precision pipette,   6. a lubricant ejection apparatus,   7. a resin liquid ejection apparatus,   8. a liquid ejection apparatus that ejects a lubricant onto precision instruments such as time pieces and cameras with pinpoint accuracy,   9. a liquid ejection apparatus that ejects a transparent resin liquid such as an ultraviolet-curing resin liquid onto a substrate in order to form, for example, a hemispherical micro lens (optical lens) used in an optical communication element or the like,   10. a liquid ejection apparatus that ejects an acid or alkali etching solution in order to etch a substrate or the like, and   11. a liquid ejection apparatus provided with a liquid consumption head for discharging a minute amount of any other liquid droplets.       

     Note that “liquid droplets” refer to a state of a liquid that is discharged from a liquid ejection apparatus, and includes a liquid in the form of particles, tears, or threads that leave a trail. It suffices for the “liquid” to be a material that can be consumed by the liquid ejection apparatus. For example, it suffices for the “liquid” to be a material in a state where the substance is in the liquid phase, and the “liquid” includes materials in a liquid state such as high- or low-viscosity liquids, and materials in a liquid state such as sols, gel waters, other inorganic solvents, organic solvents, solutions, liquid resins, and liquid metals (molten metals). The “liquid” also includes not only liquids in the form of one state of a substance, but also solvents into which particles of a functional material composed of a solid matter such as a pigment or metal particles has been dissolved, dispersed or mixed, and the like. Representative examples of liquids include ink, such as was described in the above embodiment, liquid crystal and the like. Herein, the term “ink” encompasses a variety of compositions in the form of a liquid, such as general water-soluble inks and oil-soluble inks as well as gel inks, and hot melt inks. 
     The invention is not limited to the above embodiment and modified examples, and can be achieved as various configurations without departing from the gist of the invention. For example, the technical features in the embodiment and modified examples that correspond to the technical features in the modes described in the summary of the invention may be replaced or combined as appropriate in order to solve a part of, or the entire foregoing problem, or to achieve some or all of the above-described effects. The technical features that are not described as essential in the specification may be deleted as appropriate.