Patent Publication Number: US-8534801-B2

Title: Liquid ejecting system and liquid accommodating container

Description:
BACKGROUND 
     1. Technical Field 
     The present invention relates to a liquid ejecting system and a liquid accommodating container. 
     2. Related Art 
     There is an existing ink jet printer as one type of a liquid ejecting system (hereinafter, referred to as “printer”). The printer performs printing by ejecting ink (liquid) onto a recording medium arranged on a platen through a plurality of nozzles of a liquid ejecting head (hereinafter, referred to as “head”) mounted on a carriage. 
     In such printer, a plurality of ink cartridges are supported by a cartridge holder in a detachable manner so that ink of each color is supplied to a head. Each ink cartridge has pieces of information such as a type, a color, and a remaining amount of ink accommodated in each ink cartridge and the pieces of information are transmitted and received between each ink cartridge and a printer main body to manage printing operations. 
     Therefore, a circuit substrate on which a semiconductor storage unit capable of storing the information is mounted is included in each ink cartridge. When the ink cartridges are attached to the cartridge holder, each ink cartridge is electrically connected to a printer main body so as to transmit and receive the information to and from the printer main body. 
     For example, in JP-A-2003-152297, a projection portion is formed on an attachment portion of a circuit substrate mounted on each ink cartridge at a downstream side in the direction that the ink cartridge is attached to a cartridge holder. The project portion projects in a surface direction of the circuit substrate. Therefore, an end of the circuit substrate is prevented from being made to be into direct contact with connector terminals arranged in the cartridge holder, thereby preventing the end of the circuit substrate from being chipped off and being damaged. 
     However, in JP-A-2003-152297, when the circuit substrate and the connector terminals are connected to each other in a slide contact manner, if there are dusts on a slide contact path, there is a risk that the dusts adhere to the connector terminals and get into between the circuit substrate and the connector terminals. This causes insufficient contact between the circuit substrate and the connector terminals. Therefore, data cannot be transmitted and received between the semiconductor storage unit mounted on the circuit substrate and the connector terminals. Accordingly, there arises a problem that a printer cannot be normally operated or being the like. 
     When a projection portion is formed on the attachment portion of the circuit substrate, if the circuit substrate is connected to the connector terminals in a slide contact manner, the surface of the projection portion is rubbed with the connector terminals. Therefore, when the projection portion is formed with a resin material, for example, the material of the projection portion is scratched off. Then, the scratched resin material becomes dusts in a powder form and adheres to the connector terminals. Therefore, there is a risk that the above problem does occur. 
     SUMMARY 
     An advantage of some aspects of the invention is to provide a liquid ejecting system and a liquid accommodating container which eliminates an electrical conduction failure between a circuit substrate and a connector terminal and can ensure a normal printing operation. 
     A liquid ejecting system according to an aspect of the invention includes a liquid ejecting head which ejects liquid, a container holder to which a liquid accommodating container main body is detachably attached, a connector terminal which is attached to a side face of the container holder, which is in parallel with an attachment direction of the liquid accommodating container main body, and a movement member which is provided in the container holder and moves a circuit substrate, which is movably provided on a side face along the attachment direction of the liquid accommodating container main body, from a position at which the circuit substrate is separated from the connector terminal to a position at which the circuit substrate makes contact with the connector terminal when the liquid accommodating container main body is attached to the container holder. 
     With the liquid ejecting system, when the liquid accommodating container main body is attached to the container holder, the movement of the movement member in the attachment direction makes the circuit substrate move from a position at which the circuit substrate is separated from the connector terminal to a position at which the circuit substrate makes contact with the connector terminal. Therefore, the circuit substrate can be made not to be in contact with any portions until the circuit substrate makes contact with the connector terminal. Therefore, even when there are dusts on a slide contact path as in the existing technique, a problem that the dusts adhere to the connector terminal and get into between the circuit substrate and the connector terminal does not occur. Further, even when a projection portion is formed on an attachment portion of the circuit substrate, a problem that the surface of the projection portion is rubbed with the connector terminal and the material of the projection portion is scratched off does not occur. Accordingly, a liquid ejecting system which eliminates an electrical conduction failure between the circuit substrate and the connector terminal and can ensure a normal printing operation can be provided. 
     In the above liquid ejecting system, it is preferable that the movement member be a position restriction pin which restricts the position of the liquid accommodating container main body. 
     With the liquid ejecting system, the movement member moves the circuit substrate from the position at which the circuit substrate is separated from the connector terminal to the position at which the circuit substrate makes contact with the connector terminal and functions as a position restriction pin which restricts the position of the liquid accommodating container main body. That is to say, by adding a function as a movement member to the position restriction pin, the circuit substrate can be moved from the position at which the circuit substrate is separated from the connector terminal to the position at which the circuit substrate makes contact with the connector terminal when the liquid accommodating container main body is attached to the container holder. Accordingly, a movement member is not required to be separately provided in addition to the position restriction pin. This makes it possible to suppress an apparatus from being increased in size. 
     In the above liquid ejecting system, it is preferable that the position restriction pin include a convex portion which makes contact with the circuit substrate when the liquid accommodating container main body is attached to the container holder, and the liquid accommodating container main body include a position restriction hole into which the position restriction pin is inserted and the position restriction hole include a concave portion corresponding to the convex portion. 
     With the liquid ejecting system, by providing the convex portion on the position restriction pin, the circuit substrate can be moved from the position at which the circuit substrate is separated from the connector terminal to the position at which the circuit substrate makes contact with the connector terminal when the liquid accommodating container main body is attached to the container holder. Further, the position restriction hole in the liquid accommodating container main body includes the concave portion corresponding to the convex portion. Therefore, the movement member can move along the concave portion. Accordingly, the position restriction pin can be operated as a movement member with a simple configuration. 
     In the above liquid ejecting system, it is preferable that the circuit substrate rotationally operate from a state where a surface which makes contact with the connector terminal is tilted with respect to the attachment direction to a state where the surface is in parallel with the attachment direction when the liquid accommodating container main body is attached to the container holder. 
     With the liquid ejecting system, a rotational movement mechanism of the circuit substrate is easily accommodated in the liquid accommodating container main body. To be more specific, a moving space of the circuit substrate can be made smaller in comparison with a case where the circuit substrate is not rotationally operated (for example, a configuration in which the circuit substrate is moved in a slide manner). Therefore, a space for providing a slide mechanism is not required. This makes it possible to suppress an apparatus from being increased in size. 
     A liquid accommodating container according to another aspect of the invention includes a liquid accommodating container main body which accommodates liquid, and a circuit substrate which is provided on a side face of the liquid accommodating container main body. In the liquid accommodating container, the circuit substrate can move in a direction for being separated from the liquid accommodating container main body when the liquid accommodating container main body is attached to a container holder to which the liquid accommodating container main body is detachably attached. 
     With the liquid accommodating container, the circuit substrate can move in the direction of being separated from the liquid accommodating container main body when the liquid accommodating container main body is attached to the container holder. Therefore, the circuit substrate can be made not to be in contact with any portions until the circuit substrate moves to a predetermined position (makes contact with the connector terminal). Accordingly, a liquid accommodating container which eliminates an electrical conduction failure between the circuit substrate and the connector terminal and can ensure a normal printing operation, can be provided. 
     A liquid ejecting apparatus according to still another aspect of the invention includes a liquid ejecting head which ejects liquid, a container holder to which the above liquid accommodating container main body is detachably attached, a connector terminal which is provided on a side face of the container, and a movement member which is provided in the container holder and moves the circuit substrate from a position at which the circuit substrate is separated from the connector terminal to a position at which the circuit substrate makes contact with the connector terminal when the liquid accommodating container main body is attached to the container holder. 
     With the liquid ejecting apparatus, when the liquid accommodating container main body is attached to the container holder, movement of the movement member in the attachment direction makes the circuit substrate move from a position at which the circuit substrate is separated from the connector terminal to a position at which the circuit substrate makes contact with the connector terminal. Therefore, the circuit substrate can be made not to be in contact with any portions until the circuit substrate makes contact with the connector terminal. Accordingly, a liquid ejecting apparatus which eliminates an electrical conduction failure between the circuit substrate and the connector terminal and can ensure a normal printing operation, can be provided. 
     A liquid ejecting system according to still another aspect of the invention includes a liquid ejecting head which ejects liquid, a liquid accommodating container main body which accommodates the liquid, a container holder to which the liquid accommodating container main body is detachably attached, a first circuit substrate which is fixed to a side face along an attachment direction of the liquid accommodating container main body, a first connector terminal which is movably provided on a side face of the container holder, which is in parallel with the attachment direction, and a movement member which is provided in the liquid accommodating container main body at a downstream side in the attachment direction and moves the first connector terminal from a position at which the first connector terminal is separated from the first circuit substrate to a position at which the first connector terminal makes contact with the first circuit substrate when the liquid accommodating container main body is attached to the container holder. 
     With the liquid ejecting system, when the liquid accommodating container main body is attached to the container holder, movement of the movement member in the attachment direction makes the first connector terminal move from a position at which the first connector terminal is separated from the first circuit substrate to a position at which the first connector terminal makes contact with the first circuit substrate. Therefore, the first connector terminal can be made not to be in contact with any portions until the first connector terminal makes contact with the first circuit substrate. Therefore, even when there are dusts on a slide contact path as in the existing technique, a problem that the dusts adhere to the connector terminal and get into between the circuit substrate and the connector terminal does not occur. Further, even when a projection portion is formed on an attachment portion of the circuit substrate, a problem that the surface of the projection portion is rubbed with the connector terminal and the material of the projection portion is scratched off does not occur. Accordingly, a liquid ejecting system which eliminates an electrical conduction failure between the circuit substrate and the connector terminal and can ensure a normal printing operation can be provided. 
     In the above liquid ejecting system, it is preferable that the first connector terminal rotationally operate from a state where a surface which makes contact with the first circuit substrate is tilted with respect to the attachment direction to a state where the surface is in parallel with the attachment direction when the liquid accommodating container main body is attached to the container holder. 
     With the liquid ejecting system, a rotational mechanism of the first connector terminal is easily accommodated in the container holder. To be more specific, the moving space of the first connector terminal can be made smaller in comparison with a case where the first connector terminal is not rotationally operated (for example, a configuration in which the first connector terminal is moved in a slide manner). Therefore, a space for providing a slide mechanism is not required. This makes it possible to suppress an apparatus from being increased in size. 
     In the above liquid ejecting system, it is preferable that the first connector terminal include a plurality of contact portions each of which is arranged at a position which is different from each other in the attachment direction. 
     With the liquid ejecting system, when the liquid accommodating container main body is attached to the container holder, each of the contact portions makes contact with the first circuit substrate with a time interval. Therefore, before the liquid accommodating container main body is completely attached to the container holder, various pieces of information corresponding to each contact portion can be acquired in advance. 
     In the above liquid ejecting system, it is preferable that the system further include a second circuit substrate which is fixed to a side face of the container holder, which is in parallel with the attachment direction, and a second connector terminal which is movably provided on a side face of the container holder, which is in parallel with the attachment direction, and electrically connected with the first connector terminal, and the second connector terminal move from a position at which the second connector terminal is separated from the second circuit substrate to a position at which the second connector terminal makes contact with the second circuit substrate when the first connector terminal moves from the position at which the first connector terminal is separated from the first circuit substrate to the position at which the first connector terminal makes contact with the first circuit substrate when the liquid accommodating container main body is attached to the container holder. 
     With the liquid ejecting system, when the liquid accommodating container main body is attached to the container holder, and when the first connector terminal is moved by the movement of the movement member in the attachment direction, the second connector terminal is moved from a position at which the second connector terminal is separated from the second circuit substrate to a position at which the second connector terminal makes contact with the second circuit substrate. Therefore, the second connector terminal can be made not to be in contact with any portions until the second connector terminal makes contact with the second circuit substrate. Accordingly, a liquid ejecting system which eliminates an electrical conduction failure between the second circuit substrate and the second connector terminal and can ensure a normal printing operation can be provided. 
     A liquid ejecting apparatus according to still another aspect of the invention includes a liquid ejecting head which ejects liquid, a container holder to which a liquid accommodating container main body accommodating the liquid is detachably attached, a first connector terminal which is provided on a side face of the container holder. In the liquid ejecting apparatus, the first connector terminal can move in the direction for making contact with the liquid accommodating container main body when the liquid accommodating container main body is attached to the container holder. 
     With the liquid ejecting apparatus, when the liquid accommodating container main body is attached to the container holder, the first connector terminal can move in the direction for making contact with the liquid accommodating container main body. Therefore, the first connector terminal can be made not to be in contact with any portions until the first connector terminal makes contact with the liquid accommodating container main body. Accordingly, a liquid ejecting apparatus which eliminates an electrical conduction failure on the first connector terminal and can ensure a normal printing operation can be provided. 
     A liquid accommodating container according to still another aspect of the invention includes the above liquid accommodating container main body, a first circuit substrate which is fixed to a side face of the liquid accommodating container main body, and a movement member which is provided in the liquid accommodating container main body at a downstream side in an attachment direction that the liquid accommodating container main body is attached to the container holder and moves the first connector terminal from a position at which the first connector terminal is separated from the first circuit substrate to a position at which the first connector terminal makes contact with the first circuit substrate when the liquid accommodating container main body is attached to the container holder. 
     With the liquid accommodating container, when the liquid accommodating container main body is attached to the container holder, movement of the movement member in the attachment direction makes the first connector terminal move from a position at which the first connector terminal is separated from the first circuit substrate to a position at which the first connector terminal makes contact with first circuit substrate. Therefore, the first connector terminal can be made not to be in contact with any portions until the first connector terminal makes contact with the first circuit substrate. Accordingly, a liquid accommodating container which eliminates an electrical conduction failure between the first circuit substrate and the first connector terminal and can ensure a normal printing operation can be provided. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements. 
         FIG. 1  is a schematic perspective view illustrating a configuration of a liquid ejecting system according to the invention when seen from a front side. 
         FIG. 2  is a schematic perspective view illustrating a configuration of the liquid ejecting system when seen from a rear side. 
         FIG. 3  is a schematic cross-sectional view illustrating an internal configuration of the liquid ejecting system. 
         FIG. 4  is a perspective view illustrating a container holder. 
         FIGS. 5A and 5B  are front views illustrating the container holder. 
         FIG. 6  is a perspective view illustrating a liquid accommodating container. 
         FIG. 7  is an exploded perspective view illustrating the liquid accommodating container. 
         FIG. 8  is a schematic cross-sectional view illustrating a circuit substrate and an attachment portion thereof according to a first embodiment. 
         FIG. 9  is a schematic cross-sectional view illustrating a connector terminal and a movement member according to the first embodiment. 
         FIGS. 10A through 10C  are schematic cross-sectional views illustrating a moving state of the circuit substrate according to the first embodiment. 
         FIG. 11  is a schematic view illustrating a circuit substrate and an attachment portion according to a second embodiment. 
         FIG. 12  is a schematic plan view illustrating a connector terminal and a movement member according to the second embodiment. 
         FIGS. 13A through 13C  are schematic cross-sectional views illustrating a moving state of the circuit substrate according to the second embodiment. 
         FIG. 14  is a perspective view illustrating a container holder according to a third embodiment. 
         FIG. 15  is a front view illustrating the container holder according to the third embodiment. 
         FIG. 16  is a perspective view illustrating a liquid accommodating container according to the third embodiment. 
         FIG. 17  is an exploded perspective view illustrating the liquid accommodating container according to the third embodiment. 
         FIG. 18  is a schematic cross-sectional view illustrating a first circuit substrate and an attachment portion thereof according to the third embodiment. 
         FIG. 19  is a schematic cross-sectional view illustrating a connector terminal and an attachment portion thereof according to the third embodiment. 
         FIGS. 20A through 20C  are schematic cross-sectional views illustrating a moving state of the connector terminal according to the third embodiment. 
         FIGS. 21A and 21B  are schematic views illustrating a connector terminal and an attachment portion thereof according to a fourth embodiment. 
         FIG. 22  is a schematic plan view illustrating a first circuit substrate according to the fourth embodiment. 
         FIGS. 23A through 23C  are schematic cross-sectional views illustrating a moving state of the connector terminal according to the fourth embodiment. 
         FIGS. 24A and 24B  are schematic views illustrating a connector terminal and an attachment portion thereof according to a fifth embodiment. 
         FIGS. 25A through 25C  are schematic cross-sectional views illustrating a moving state of the connector terminal according to the fifth embodiment. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Hereinafter, embodiments of the invention are described with reference to drawings. The embodiments illustrate an aspect of the invention and are not intended to limit the invention. The embodiments can be arbitrarily modified within a range of the technical scope of the invention. In the drawings, scales and numbers of components in each configuration are different from those in a practical configuration in order to make each configuration understood easily. 
     First Embodiment 
       FIG. 1  is a schematic perspective view illustrating a configuration of a liquid ejecting system  1  according to an embodiment when seen from a front side.  FIG. 2  is a schematic perspective view illustrating a configuration of the liquid ejecting system  1  when seen from a rear side. 
     Hereinafter, description is given based on an XYZ orthogonal coordinate system as illustrated in  FIG. 1 . In the XYZ orthogonal coordinate system, the X direction and the Y direction are in parallel with the direction of a plane on which the liquid ejecting system  1  is arranged. The Z direction is orthogonal to the plane on which the liquid ejecting system  1  is arranged. In practice, an XY plane is set to be a plane which is in parallel with a horizontal plane and the Z direction is set to be an upward vertical direction. In the embodiment, an attachment direction in which ink cartridges (liquid accommodating containers)  90  are attached to a cartridge holder (container holder)  80  is set to be the Y direction (−Y direction) and a scanning direction of a liquid ejecting head  21   a  is set to be the X direction. 
     As illustrated in  FIG. 1 , the liquid ejecting system  1  is an ink jet large format printer (LFP) which performs recording onto a recording paper having a relatively large size such as A1 size or B1 size (defined by JIS), for example. The liquid ejecting system  1  includes a printer main body (liquid ejecting apparatus)  2  and a leg portion  3 . The liquid ejecting system  1  is configured such that the leg portion  3  is detachably fixed to the printer main body  2 . Hereinafter, description is given by using an ink jet printer as an example of a liquid ejecting system. 
     The liquid ejecting system  1  includes a liquid ejecting head  21   a , ink cartridges  90  (ink cartridge main bodies  91 ) (see,  FIG. 6 ), a cartridge holder  80 , circuit substrates  100  (see,  FIG. 6 ), connector terminals  110 , and movement members  95  (see,  FIGS. 5A and 5B ). The liquid ejecting head  21   a  ejects ink (liquid). The ink cartridges (ink cartridge main bodies  91 ) accommodate the ink. The ink cartridges  90  are detachably attached to the cartridge holder  80 . The circuit substrates  100  are movably provided on side faces of the ink cartridges  90  along an attachment direction in which the ink cartridges  90  are attached to the cartridge holder  80  (hereinafter, referred to as attachment direction). The connector terminals  110  are attached to a side face of the cartridge holder  80 , which is in parallel with the attachment direction. The movement members  95  are provided in the cartridge holder  80 . Further, the movement members  95  move the circuit substrates  100  from positions at which the circuit substrates  100  are separated from the connector terminals  110  to positions at which the circuit substrates  100  make contact with the connector terminals  110  when the ink cartridges  90  are attached to the cartridge holder  80 . 
     Each ink cartridge  90  includes an ink cartridge main body  91  and the circuit substrate  100  and is used in the liquid ejecting system  1 . The printer main body  2  includes the liquid ejecting head  21   a , the cartridge holder  80 , the connector terminals  110 , and the movement members  95  and is used in the liquid ejecting system  1 . That is to say, the printer main body  2  is an apparatus obtained by removing the ink cartridges  90  from the liquid ejecting system  1 . 
     The printer main body  2  includes a paper feeding unit  10 , a recording unit  20  and a paper discharge unit  30 . The paper feeding unit  10  is provided above the recording unit  20  so as to project to a rear face side (+Y direction side). A roll paper holder  11  and a roll paper cover  12  are provided in the paper feeding unit  10 . 
     The roll paper holder  11  is a portion on which one roll-form recording paper (hereinafter, referred to as roll paper) is placed and is provided in the paper feeding unit  10 . The roll paper holder  11  includes spindle portions  13  and spindle receiving portions  14 ,  15 . The spindle portions  13  are shaft members for holding a roll paper and are extended in the X direction. Roll paper press portions are provided on the spindle portions  13 . With the roll paper press portions, a roll paper held by the spindle portions  13  is pressed from both sides so as not to be positionally deviated. The spindle receiving portions  14 ,  15  are bearing portions which support the spindle portions  13  in a rotatable manner. 
     The roll paper cover  12  is a swing-type cover member which can be opened and closed and is attached to an outer side of the paper feeding unit  10 . The roll paper cover  12  is supported such that the entire cover can be rotationally moved. The roll paper cover  12  can be made in an open state by pressing up a lower portion of the roll paper cover  12  and can be made in a close state by pressing down the lower portion thereof. In  FIG. 1 , the roll paper cover  12  is in the open state. The roll paper cover  12  covers the roll paper holder  11  when the roll paper cover  12  is in the close state. 
     The recording unit  20  includes a carriage  21 , a carriage movement mechanism  22 , a flexible flat cable (FFC)  23 , the cartridge holder (container holder)  80 , ink tubes  25 , a cover member  26 , an operation panel  27 , a capping mechanism  28 , and a waste liquid collecting portion  29 . The recording unit  20  further includes a controller  70  (see,  FIG. 3 ), a paper feeding roller (not shown) and the like in addition to the above members. The controller  70  controls operations of each component in the liquid ejecting system  1 . 
     The carriage  21  is a holding member which holds the liquid ejecting head  21   a  and can be moved in the main scanning direction (X direction) by the carriage movement mechanism  22 . The liquid ejecting head  21   a  has a liquid ejecting head for black ink, which discharges black ink, and a plurality of liquid ejecting heads for color inks, which discharge ink of each color such as light yellow, yellow, light cyan, cyan, light magenta, magenta, and so on. The liquid ejecting head  21   a  includes pressure generation chambers and nozzle openings which communicate with the pressure generation chambers. Ink is stored in each pressure generation chamber. Ink droplets are ejected onto a roll paper through each nozzle opening by pressurizing each pressure generation chamber, in which ink is stored, at a predetermined pressure. 
     The carriage movement mechanism  22  has a rail  22   a  and a carriage belt  22   b . The carriage  21  is coupled to the carriage belt  22   b . If the carriage belt  22   b  moves in the main scanning direction, the carriage  21  is guided by the rail  22   a  so as to reciprocate in the main scanning direction. 
     The FFC  23  is a cable which electrically connects the liquid ejecting head  21   a  and the controller  70 . One end of the FFC  23  is connected to a connector of the liquid ejecting head  21   a  while the other end thereof is connected to a connector of the controller  70 . A recording signal from the controller  70  is transmitted to the liquid ejecting head  21   a  through the FFC  23 . 
     The cartridge holder  80  includes the ink cartridges (see,  FIG. 6 ) therein. The ink cartridges  90  are cartridges which accommodate ink of each color (black, light yellow, yellow, light cyan, cyan, light magenta, magenta and the like) ejected from the liquid ejecting head  21   a.    
     The ink tubes  25  are tube members which connect the liquid ejecting head  21   a  and the ink cartridges  90  and are separately provided for each color. An ink pressure-supply mechanism (not shown) is connected to each of the ink tubes  25 . Therefore, ink of each color pressurized by the ink pressure-supply mechanism is transmitted to the liquid ejecting head  21   a  from each ink cartridge  90 . 
     The cover member  26  has a front cover  26   a  and an upper cover  26   b . The front cover  26   a  is provided at a front face of the recording unit  20  so as to cover the carriage  21 , the carriage movement mechanism  22 , the ink tubes  25 , and the like. The front cover  26   a  can be made in an open state by being pressed down and can be made in a close state by being pressed up. In  FIG. 1 , the front cover  26   a  is in the open state. The upper cover  26   b  is provided at an upper portion of the recording unit  20  so as to cover a paper feeding roller (not shown) and the like. The upper cover  26   b  can be made in an open state by being pressed up and can be made in a close state by being pressed down. In  FIG. 1 , the upper cover  26   b  is in the close state. 
     The operation panel  27  is an operation portion for operating the liquid ejecting system  1 . The operation panel  27  is provided on a right side (+X direction side) of the upper cover  26   b  of the recording unit  20  in  FIG. 1 . A display screen  27   a  and various types of buttons (not shown) are arranged on the operation panel  27  so that a user can operate the buttons while checking the display screen. The display screen  27   a  is formed by a liquid crystal attachment, for example. For example, information relating to a printing operation, information relating to exchange of ink, and information relating to an amount of ink supplied to the waste liquid collecting portion  29  are displayed on the display screen  27   a  of the operation panel  27 . 
     The capping mechanism  28  is a maintenance mechanism for preventing viscosity of ink in the vicinity of the nozzle openings of the liquid ejecting head  21   a  from being increased, as illustrated in  FIG. 2 . A suction mechanism is attached to the capping mechanism  28  so as to suck ink adhered to the nozzle openings. 
     The waste liquid collecting portion  29  is a portion in which waste liquids are collected. The waste liquids include ink sucked by the capping mechanism  28 , ink used when ink is initially filled into the liquid ejecting head  21   a , washing liquid used when an ink supply flow system up to the liquid ejecting head  21   a  is washed, and the like, for example. The waste liquid collecting portion  29  is provided under the capping mechanism  28  at a rear face side (+Y direction side) of the printer main body  2  as illustrated in  FIG. 2 . A waste liquid unit  60  is detachably attached to the waste liquid collecting portion  29 . 
     The paper discharge unit  30  is provided at a lower side of the recording unit  20  and has a paper discharge roller (not shown) and a paper discharge guide  31   b . The paper discharge roller is provided so as to abut against a roll paper. A roll paper is transmitted through the paper discharge roller in the sub scanning direction (direction perpendicular to the main scanning direction). The paper discharge guide  31   b  is provided so as to project to the front side (−Y direction side) of the recording unit  20 . A roll paper is guided through the paper discharge guide  31   b  in the sub scanning direction. 
     The leg portion  3  includes two supporting columns  42  having rollers  41  for moving the liquid ejecting system  1  and a reinforcing bar  43  bridging the supporting columns  42 . The recording unit  20  is screwed so as to be fixed to upper portions of the supporting columns  42 . A predetermined space is provided between the supporting columns  42  such that a paper reception attachment is arranged. The paper reception attachment receives a roll paper discharged from the paper discharge unit  30 . 
       FIG. 3  is a schematic cross-sectional view illustrating an internal configuration of the liquid ejecting system  1 . 
     As illustrated in  FIG. 3 , a paper transportation path  50  from the paper feeding unit  10  toward the paper discharge unit  30  through the recording unit  20  is provided so as to be tilted from an upper rear face side (+YZ direction side) to a lower front face side (−YZ direction side) of the liquid ejecting system  1 . The paper transportation path  50  includes a paper feeding guide  51 , a paper feeding roller  52 , driven rollers  53 , a platen  54 , a paper suction portion  55 , and a paper discharge guide  31   b . The paper feeding guide  51  is flat and is arranged from the paper feeding unit  10  to the recording unit  20 . The paper feeding roller  52  and the driven rollers  53  are arranged so as to be opposed to each other and can be made to be in contact with and to be separated from each other. The platen  54  is a paper transportation guiding portion which is flat and is opposed to the liquid ejecting head  21   a  mounted on the carriage  21 . The paper suction portion  55  is flat and is provided between the recording unit  20  and the paper discharge unit  30 . The paper discharge guide  31   b  is provided in the paper discharge unit  30 . 
     Each surface of the paper feeding guide  51  and the paper discharge guide  31   b  acts as a paper transportation surface. A surface of the paper suction portion  55  acts as a paper transportation surface and a paper suction surface. The paper suction portion  55  includes suction ports (medium suction portions)  55   a ,  55   b ,  55   c . The suction ports  55   a ,  55   b ,  55   c  are formed such that a plurality of suction ports are arranged in parallel in the main scanning direction and arranged in three rows in the sub scanning direction. The external air is sucked through each of the suction ports  55   a ,  55   b ,  55   c  by a fan  57  provided in the recording unit  20 . Therefore, a roll paper transported on the paper suction portion  55  is attracted. 
     A surface of the platen  54  acts as a paper transportation guiding surface and as a paper suction surface. The platen  54  includes a plurality of suction ports  54   a  which are alternately arranged in parallel in the main scanning direction. The external air is sucked through each of the suction ports  54   a  by the fan  57  arranged in the recording unit  20 . Therefore, a roll paper transported on the platen  54  is attracted. Accordingly, even when a width of a roll paper is large in particular, the roll paper is reliably sucked over the entire width thereof on the platen  54  so as to be made to be in a substantially flat form at the time of recording. 
     A space  56  is provided between the platen  54  and the suction portion  55 . The external air is sucked through the space  56  by the fan  57  so that a roll paper transported on the space  56  is attracted. The platen  54  is divided so as to correspond to the size of a roll paper in the width direction. For example, the platen  54  is divided into seven with a width of 4 inches each. For example, an ink absorbent such as a sponge or a nonwoven fabric is provided on each divided portion. 
       FIG. 4  is a perspective view illustrating the cartridge holder  80  to which liquid accommodating containers are attached.  FIGS. 5A and 5B  are front views illustrating the cartridge holder  80  as illustrated in  FIG. 4 .  FIG. 5A  is a front view illustrating the cartridge holder  80 .  FIG. 5B  is an enlarged front view illustrating the movement member  95 . 
     As illustrated in  FIG. 4  and  FIGS. 5A and 5B , the cartridge holder  80  includes an L-shaped holder main body  81 , and a U-shaped frame body  82 . The frame body  82  includes a pair of supporting side walls  82   a ,  82   a  and a ceiling wall  82   b  which links upper ends of the supporting side walls  82   a ,  82   a.    
     The holder main body  81  includes a substrate  81   a  having a rectangular shape when seen from above and a wall body  81   b  which is attached to an upper surface of the substrate  81   a  at a rear side. The substrate  81   a  is a supporting table on which the ink cartridges  90  are placed in parallel when the ink cartridges  90  are attached to the cartridge holder  80 . A plurality of guide rails  83  are extended in row on the substrate  81   a  so as to be in parallel with the Y direction. The guide rails  83  guide the ink cartridges  90  when the ink cartridges  90  are attached/detached to/from the cartridge holder  80 . An inner portion of the cartridge holder  80  is partitioned into five cartridge slots  89 A,  89 B,  89 C,  89 D,  89 E by the guide rails  83 . The cartridge slots  89 A through  89 E function as container attachment portions which accommodate the ink cartridges  90  separately to each color. 
     The wall body  81   b  is opened to the +Y direction side and a rectangular ceiling plate  81   c  is attached to an upper end of the wall body  81   b . Slider members  84  are provided on the wall body  81   b . The slider members  84  are biased to the front side (+Y direction) by biasing units (not shown). That is to say, the slider members  84  are biased in the direction opposite to the attachment direction (−Y direction) of the ink cartridges  90 . Inner end surfaces (XZ surfaces)  84   a  of the slider members  84  are surfaces against which ends of the cartridge slots  89 A through  89 E at the downstream side (−Y direction side) in the attachment direction abut. The slider members  84  are positioned at the front side (+Y direction side) with forces of the biasing units when the ink cartridges  90  are not attached to the cartridge slots  89 A through  89 E. 
     If the ink cartridges  90  are inserted into the cartridge slots  89 A through  89 E, the slider members  84  are moved to the inner side (−Y direction) while being pressed by the front faces of the ink cartridges  90  (faces at the downstream side in the attachment direction). If the ink cartridges  90  are completely attached to the cartridge slots  89 A through  89 E, the slider members  84  stop at predetermined positions. The slider members  84  apply biasing forces in the direction opposite to the attachment direction to the attached ink cartridges  90  by the biasing units all the time. That is, the slider members  84  apply biasing forces to the attached ink cartridges  90  even when the ink cartridges  90  are attached to the cartridge slots  89 A through  89 E. The biasing forces act on the ink cartridges  90  so as to press them out to the front side when the ink cartridges  90  are detached from the cartridge slots  89 A through  89 E. 
     The movement members  95 , position restriction pins  85 , air communication ports  86 , ink supply pins  87 , identification members  88   a  through  88   e  are provided on the wall body  81   b  of the cartridge slots  89 A through  89 E. The connector terminals  110  are fixed to the wall body  81   b  of the cartridge slots  89 A through  89 E. The connector terminals  110  are electrically connected to the circuit substrates  100  (see,  FIG. 6 ) which are movably provided in the ink cartridges  90 . 
     The movement members  95  are provided at upper sides of the cartridge slots  89 A through  89 E and the position restriction pins  85  are provided at lower sides of the cartridge slots  89 A through  89 E. Each movement member  95  includes a main body  95   a  and a convex portion  95   b . The convex portion  95   b  makes contact with the circuit substrate  100  when each ink cartridge  90  is attached to the cartridge holder  80 . The main body  95   a  has a circular shape and the convex portion  95   b  has a rectangular shape when seen from the front side. 
     The movement members  95  and the position restriction pins  85  are members for restricting positions of the ink cartridges  90 . That is to say, the movement members  95  move the circuit substrates  100  from positions at which the circuit substrates  100  are separated from the connector terminals  110  to positions at which the circuit substrates  100  make contact with the connector terminals  110 . At the same time, the movement members  95  function as position restriction pins which restrict positions of the ink cartridges  90 . 
     The air communication ports  86  are provided to be close to the position restriction pins  85  at lower portions in the cartridge slots  89 A through  89 E. The air communication ports  86  are ports for supplying the air to pairs of the movement members  95  located at an upper position and the position restriction pins  85  located at a lower position, and the ink cartridges  90 . The movement members  95  and the position restriction pins  85  are inserted into position restriction holes  98 ,  99  of the ink cartridges  90 , respectively. 
     The ink supply pins  87  are provided to be close to the movement members  95  at upper sides in the cartridge slots  89 A through  89 E. The ink supply pins  87  are pins for supplying inks from the ink cartridges  90  to the liquid ejecting head  21   a  (see,  FIG. 1 ) through the ink tubes  25  (see,  FIG. 1 ). 
     The identification members  88   a  through  88   e  are provided in the cartridge slots  89 A through  89 E, respectively. The identification members  88   a  through  88   e  are provided at positions between the movement members  95  at the upper sides and the air communication ports  86 . The identification members  88   a  through  88   e  are members for preventing the ink cartridges  90  from being mistakenly attached. 
     Convex-concave fitting portions are formed in front ends of the identification members  88   a  through  88   e . On the other hand, identification portions  94  (see,  FIG. 6 ) corresponding to shapes of the convex-concave fitting portions in the identification members  88   a  through  88   e  are formed in front end faces in the ink cartridges  90  in the insertion direction. Although the shapes of the identification portions  94  are not illustrated in detail in the drawings, the shapes are different depending on the types of the ink cartridges  90 . 
     That is to say, each convex-concave fitting portion of each of the identification members  88   a  through  88   e  can be fitted into the identification portion  94  of one ink cartridge  90  only and cannot be fitted into the identification portions  94  of other ink cartridges  90 . In such a manner, the liquid ejecting system  1  according to the embodiment is configured such that the ink cartridges  90  are not mistakenly attached by combinations of the convex-concave fitting portions of the identification members  88   a  through  88   e  and the identification portions  94  of the ink cartridges  90 . 
     The connector terminals  110  are made to be in contact with the circuit substrates  100  provided on the ink cartridges  90  so as to be electrically connected thereto when the ink cartridges  90  are attached to the cartridge slots  89 A through  89 E. Details of the circuit substrate  100  and the connector terminal  110  are described later. 
       FIG. 6  is a perspective view illustrating the ink cartridge  90 .  FIG. 7  is an exploded perspective view of the ink cartridge  90  as illustrated in  FIG. 6 . 
     As illustrated in  FIG. 6  and  FIG. 7 , each ink cartridge  90  includes a flattened ink cartridge main body (liquid accommodating container main body)  91  having a substantially rectangular parallelepiped shape and the circuit substrate  100 . 
     A bag accommodating portion  91   a  having a substantial box shape and a detection unit accommodating portion  91   b  are formed in the ink cartridge main body  91 . An upper portion of the bag accommodating portion  91   a  is opened. The detection unit accommodating portion  91   b  is positioned at a front face side (−Y direction side) of the bag accommodating portion  91   a . Further, an ink pack  92  as a liquid accommodating chamber is accommodated in the bag accommodating portion  91   a . A liquid remaining amount detection unit  93  in which an ink supply port  93   a  (liquid supply port) is provided is accommodated in the detection unit accommodating portion  91   b.    
     The liquid remaining amount detection unit  93  is attachable/detachable to/from the ink cartridge main body  91 . A remaining amount detection sensor (sensor using a piezoelectric element) (not shown) is provided in the liquid remaining amount detection unit  93 . The remaining amount detection sensor is a sensor for detecting a remaining amount of ink in the ink cartridge  90 . 
     A cover  96  covering the bag accommodating portion  91   a  and the detection unit accommodating portion  91   b  is attached to the ink cartridge main body  91 . The ink cartridges  90  are attached to the cartridge slots  89 A through  89 E in an upright manner. 
     In the embodiment, there are five types of ink cartridges  90 . Inks of five colors which are different from each other are stored in the ink packs  92  of the five ink cartridges  90 , respectively. Only types of inks stored in the ink packs  92  and shapes of the above identification portions  94  are different from each other and other configurations are the same among these five ink cartridges  90 . 
     The ink supply port  93   a  and an air inflow port  97  are provided in a front end face (face at the −Y direction side) of each ink cartridge  90 . The ink supply port  93   a  is connected to an ink discharge port  92   a  of the ink pack  92 . 
     Next, ink supply from the ink packs  92  to the liquid ejecting head  21   a  is described. If the ink cartridges  90  are attached to the cartridge slots  89 A through  89 E, the above ink supply pins  87  are inserted into the ink supply ports  93   a . The ink supply pins  87  are connected to the liquid ejecting head  21   a  through the ink tubes  25 . 
     If the ink cartridges  90  are attached to the cartridge slots  89 A through  89 E, the air inflow ports  97  are inserted into the above air communication ports  86 . The air communication ports  86  are connected to pressure pumps through pressurized air supply paths (not shown). The pressure pumps supply pressurized air to the bag accommodating portions  91   a  through the pressurized air supply paths, the air communication ports  86 , and the air inflow ports  97  so that the ink packs  92  are pressurized. If the ink packs  92  are pressurized, inks flowing out from the ink discharge ports  92   a  of the ink packs  92  are supplied to the liquid ejecting head  21   a  through the ink supply ports  93   a.    
     A pair of position restriction holes  98 ,  99  are provided in the front end face (face at the −Y direction side) of each ink cartridge  90  so as to be separated from each other. 
     Next, positional restriction by the position restriction holes  98 ,  99  and the above pairs of the movement members  95  and the position restriction pins  85  is described. If the ink cartridges  90  are inserted into the cartridge slots  89 A through  89 E, front ends of the movement members  95  and the position restriction pins  85  are fitted into the position restriction holes  98 ,  99 , respectively. Thereafter, if the ink cartridges  90  are further inserted to inner sides of the cartridge slots  89 A through  89 E, the ink cartridges  90  are moved based on the movement members  95  and the position restriction pins  85 . 
     If the ink cartridges  90  are completely attached to the cartridge slots  89 A through  89 E, the position restriction holes  98 ,  99  and the pairs of the movement members  95  and the position restriction pins  85  are fitted, respectively. Therefore, positions of the ink cartridges  90  in the direction along the front end faces thereof are determined so that the movements of the ink cartridges  90  are restricted. 
     Each of one position restriction holes  98  is set to be a shape substantially corresponding to a cross-sectional shape perpendicular to an axial direction of the movement member  95  at the upper side. That is, each position restriction hole  98  is set to be a shape including a concave portion corresponding to the convex portion  95   b  of the movement member  95 . Each of the other position restriction holes  99  is set to be a shape substantially corresponding to a cross-sectional shape perpendicular to an axial direction of the position restriction pin  85  at the lower side. That is, each position restriction hole  99  is set to be a long elongated hole in the height direction (Z direction) of the ink cartridge main body  91 . By setting each of the other position restriction holes  99  to be a long elongated hole in such a manner, a dimensional tolerance or the like can be easily allowed while keeping the positioning accuracy. 
     Each circuit substrate  100  is provided on a side face (face at the +Z direction side) of each ink cartridge (ink cartridge main body  91 ) along the attachment direction (−Y direction) in a rotationally movable manner. In other words, each circuit substrate  100  is provided on a side face of the ink cartridge  90 , which is in parallel with the attachment direction, in a rotationally movable manner. It is to be noted that being in “parallel” with the attachment direction includes both of a case of being in perfectly parallel with the attachment direction and a case of being in substantially parallel with the attachment direction. A rotational movement mechanism of each circuit substrate  100  is accommodated in the ink cartridge main body  91 . The rotational movement mechanism of the circuit substrate  100  is described in detail later. 
       FIG. 8  is a schematic cross-sectional view illustrating the circuit substrate  100  and an attachment portion thereof.  FIG. 8  illustrates a side end (end at the +Z direction side) of the ink cartridge  90 , which is in parallel with the downstream side (−Y direction side) in the attachment direction. 
     As illustrated in  FIG. 8 , the circuit substrate  100  includes a circuit element portion  101 , a circuit substrate main body  104 , a supporting portion  106 , a supporting shaft  107 , and a guiding portion  108 . The circuit element portion  101  is attached in a concave portion  101   b  formed in the circuit substrate main body  104  at a side end (end at the +Z direction side). Thus, a position of the circuit element portion  101  is defined. 
     An electrode pad  101   a  which is electrically connected to the connector terminal  110  (see,  FIG. 9 ), which will be described later, is formed on a surface (surface at the +Z direction side) of the circuit element portion  101 . The electrode pad  101   a  is electrically connected to the above remaining amount detection sensor. A circuit pattern (not shown) is formed and electrically connected with the electrode pad  101   a . The circuit pattern is covered by a solder resist film (not shown), for example. A memory element  102  such as EEPROM is mounted on a rear face (face at the −Z direction side) of the circuit element portion  101 . The memory element  102  is a member for recording pieces of information such as an ink remaining amount and a usage history of the cartridge, for example. The memory element  102  is firmly fixed to the rear face of the circuit element portion  101  with a mold resin  103 . 
     The circuit substrate  100  is movably provided on a side face (face at the +Z direction side) of the ink cartridge  90  (ink cartridge main body  91 ), which is in parallel with the attachment direction (−Y direction). The circuit substrate  100  rotationally moves about the supporting shaft  107  as a center axis. The supporting shaft  107  supports the supporting portion  106 . The supporting shaft  107  is a bar-shaped member extended in the X direction and is positioned at a center portion of the supporting portion  106 . Both ends of the supporting shaft  107  are fixed to the ink cartridge main body  91 . The circuit substrate  100  rotationally operates from a state where a surface which makes contact with the connector terminal  110  is tilted with respect to the attachment direction (−Y direction) to a state where the surface is in parallel with the attachment direction when the ink cartridge  90  is attached to the cartridge holder  80 . In  FIG. 8 , a state where the circuit substrate  100  is in parallel with the attachment direction is illustrated for convenience. 
     The guiding portion  108  is provided on a side end (end at the −Z direction side) of the circuit substrate main body  104 . An end of the guiding portion  108  at the downstream side in the attachment direction is sloped in a tapered form. The circuit substrate  100  rotationally operates by the movement member  95  which makes contact with the guiding portion  108  and moves when the ink cartridge  90  is attached to the cartridge holder  80 . 
     A projection portion  105  is formed on a side end (end at the +Z direction side) of the circuit substrate main body  104  at the downstream side in the attachment direction so as to be close to the circuit element portion  101 . The projection portion  105  is formed so as to project to a surface side (+Z direction side) of the circuit substrate  100 . The projection portion  105  functions for preventing the end (end at the −Y direction side) of the circuit element portion  101  from making contact with the connector terminal  110  (see,  FIG. 9 ), which will be described later. To be more specific, when the circuit substrate main body  104  is formed with a glass epoxy material, if the connector terminal  110  makes direct contact with the circuit substrate main body  104 , the following problem arises. That is, a problem that the end of the circuit element portion  101  is chipped off or being the like and damaged arises. Therefore, it is so configured that the end of the circuit element portion  101  does not make contact with the connector terminal  110 . 
     When the circuit substrate and the connector terminal are connected to each other in a slide contact manner, if there are dusts on a slide contact path, there is a risk that the dusts adhere to the connector terminal and get into between the circuit substrate and the connector terminal. This causes insufficient contact between the circuit substrate and the connector terminal. Therefore, data cannot be transmitted and received to and from a memory element (semiconductor storage unit) mounted on the circuit substrate. Accordingly, there arises a problem that a printer cannot be normally operated or being the like. When a projection portion is formed on an attachment portion of the circuit substrate, if the circuit substrate is connected to the connector terminal in a slide contact manner, a surface of the projection portion is rubbed with the connector terminal. Therefore, when the projection portion is formed with a resin material, for example, the material of the projection portion is scratched off. Then, the resin material becomes dusts in a powder form and adheres to the connector terminal. Therefore, there is a risk that the above problem does occur. 
     Then, the liquid ejecting system  1  according to the invention includes the circuit substrates  100 , the connector terminals  110 , and the movement members  95 . The circuit substrates  100  are movably provided on side faces of the ink cartridge main bodies  91 , which are in parallel with the attachment direction. The connector terminals  110  are attached to the cartridge holder  80  which is in parallel with the attachment direction. The movement members  95  are provided on the cartridge holder  80  and move the circuit substrates  100  from positions at which the circuit substrates  100  are separated from the connector terminals  110  to positions at which the circuit substrates  100  make contact with the connector terminals  110  when the ink cartridge main bodies  91  are attached to the cartridge holder  80 . With this, an electrical conduction failure between the circuit substrates  100  and the connector terminals  110  is eliminated and a normal printing operation can be ensured in the liquid ejecting system  1 . Hereinafter, the connector terminals  110  and the movement members  95  are described in detail with reference to  FIG. 9 . 
       FIG. 9  is a schematic cross-sectional view illustrating the connector terminal  110  and the movement member  95 .  FIG. 9  illustrates a side end (end at the −Z direction side) of the cartridge holder  80 , which is in parallel with the downstream side (−Y direction side) in the attachment direction. 
     As illustrated in  FIG. 9 , the connector terminal  110  is attached to a side face of the cartridge holder  80 , which is in parallel with the attachment direction. To be more specific, a base end of the connector terminal  110  is supported by a surface of a wall body  81   b  on the +Y direction side and is attached thereto so as to be elastically swingable. The connector terminal  110  is formed with an elastic metal material such as copper. 
     A contact portion  110   a  which is electrically connected to the electrode pad  101   a  of the circuit substrate  100  is formed on a surface (surface at the −Z direction side) of the connector terminal  110 . The contact portion  110   a  is provided at a position corresponding to the electrode pad  101   a . The connector terminal  110  is electrically connected to a control circuit in the printer main body  2  through a wiring (not shown). 
     A base end of the movement member  95  is supported by a surface of the wall body  81   b  on the +Y direction side. The movement member  95  is arranged at a position opposed to the connector terminal  110  so as to be separated therefrom by a predetermined distance. An end of the convex portion  95   b  of the movement member  95  at the upstream side in the attachment direction is sloped in a tapered form. The movement member  95  moves the circuit substrate  100  from a position at which the circuit substrate  100  is separated from the connector terminal  110  to a position at which the circuit substrate  100  makes contact with the connector terminal  110  when the ink cartridge  90  is attached to the cartridge holder  80 . 
     With such configuration, when the ink cartridge  90  is attached to the cartridge holder  80 , the electrode pad  101   a  of the circuit substrate  100  makes contact with the contact portion  110   a  of the connector terminal  110 . Therefore, the memory element  102  and the remaining amount detection sensor are electrically connected to a control circuit in the printer main body  2  through the circuit substrate  100 . This makes it possible to control operations of the memory element  102  and the remaining amount detection sensor from the side of the printer main body  2 . 
       FIGS. 10A through 10C  are schematic cross-sectional views illustrating a moving state of the circuit substrate  100  in the first embodiment.  FIG. 10A  is a view illustrating a state before the ink cartridge  90  is attached to the cartridge holder  80 .  FIG. 10B  is a view illustrating a state when the ink cartridge  90  is being attached to the cartridge holder  80 .  FIG. 10C  is a view illustrating a state after the ink cartridge  90  is completely attached to the cartridge holder  80 . In  FIGS. 10A through 10C , the position restriction hole  98  into which the movement member  95  is inserted is not illustrated for sake of convenience. 
     Then, a moving state of the circuit substrate  100  is described in which the circuit substrate  100  is moved from the position at which the circuit substrate  100  is separated from the connector terminal  110  to the position at which the circuit substrate  100  makes contact with the connector terminal  110  when the ink cartridge  90  is attached to the cartridge holder  80 . 
     At first, as illustrated in  FIG. 10A , a state before the ink cartridge  90  is attached to the cartridge holder  80 , that is, a state before the movement member  95  makes contact with the circuit substrate  100  is considered. In this case, the circuit substrate  100  is tilted with respect to the attachment direction at a predetermined angle. To be more specific, a posture of the circuit substrate  100  is held by a holding member (not shown) such as a stopper in a state where an end thereof (end at the −YZ direction side) gets into the ink cartridge main body  91 . The movement member  95  is positioned at a lower side (−Z direction side) with respect to the supporting shaft  107  of the circuit substrate  100 . The projection portion  105  is separated from the contact portion  110   a  of the connector terminal  110  by a predetermined distance. 
     Next, as illustrated in  FIG. 10B , a state when the ink cartridge  90  is being attached to the cartridge holder  80 , that is, a state when the movement member  95  makes contact with the circuit substrate  100  to move the circuit substrate  100  is considered. The movement member  95  is positioned at a lower side (−Z direction side) with respect to the supporting shaft  107  of the circuit substrate  100  in a state before the ink cartridge  90  is attached to the cartridge holder  80 . Therefore, the movement member  95  is inserted into the position restriction hole  98  (see,  FIG. 7 ). Thereafter, if the movement member  95  makes contact with the guiding portion  108  at the lower side of the circuit substrate  100  and moves in the attachment direction, the circuit substrate  100  rotationally moves about the supporting shaft  107  in the clockwise direction. That is to say, the circuit substrate  100  rotationally moves from a state where the circuit substrate  100  is tilted with respect to the attachment direction at a predetermined angle such that an angle gradient thereof becomes smaller. 
     The position restriction hole  98  has a concave portion corresponding to the convex portion  95   b  of the movement member  95 . Therefore, the movement member  95  can move along the concave portion. Both of an end of the guiding portion  108  at the downstream side in the attachment direction and an end of the convex portion  95   b  of the movement member  95  at the upstream side in the attachment direction are sloped in a tapered form. Therefore, the circuit substrate  100  rotationally moves smoothly. 
     The projection portion  105  is separated from the contact portion  110   a  by a predetermined distance in a state before the ink cartridge  90  is attached to the cartridge holder  80 . Therefore, the projection portion  105  does not make contact with any portions in a moving process of the movement member  95 . Further, the contact portion  110   a  does not make contact with any portions until the contact portion  110   a  makes contact with the electrode pad  101   a.    
     Therefore, even when there are dusts on a slide contact path as in the existing technique, a problem that the dusts adhere to the connector terminal and get into between the circuit substrate and the connector terminal does not occur. Further, even when a projection portion is formed on an attachment portion of the circuit substrate, a problem that a surface of the projection portion is rubbed with the connector terminal and the material of the projection portion is scratched off does not occur. 
     As illustrated in  FIG. 10C , a state after the ink cartridge  90  is completely attached to the cartridge holder  80  will be considered. In this case, the circuit substrate  100  is in parallel with the attachment direction. That is, the electrode pad  101   a  of the circuit substrate  100  makes contact with the contact portion  110   a  of the connector terminal  110 . Therefore, the memory element  102  and the remaining amount detection sensor are electrically connected to the control circuit in the printer main body  2  through the circuit substrate  100 . This makes it possible to control operations of the memory element  102  and the remaining amount detection sensor from the side of the printer main body  2 . 
     With the liquid ejecting system  1  according to the embodiment, when the ink cartridge  90  is attached to the cartridge holder  80 , the movement of the movement member  95  in the attachment direction makes the circuit substrate  100  move from a position at which the circuit substrate  100  is separated from the connector terminal  110  to a position at which the circuit substrate  100  makes contact with the connector terminal  110 . Therefore, the circuit substrate  100  can be made not to be in contact with any portions until the circuit substrate  100  makes contact with the connector terminal  110 . Therefore, even when there are dusts on a slide contact path as in the existing technique, a problem that the dusts adhere to the connector terminal and get into between the circuit substrate and the connector terminal does not occur. Further, even when a projection portion is formed on an attachment portion of the circuit substrate, a problem that a surface of the projection portion is rubbed with the connector terminal and the material of the projection portion is scratched off does not occur. Accordingly, the liquid ejecting system  1  which eliminates an electrical conduction failure between the circuit substrate  100  and the connector terminal  110  and can ensure a normal printing operation can be provided. 
     With this configuration, the movement member  95  moves the circuit substrate  100  from the position at which the circuit substrate  100  is separated from the connector terminal  110  to the position at which the circuit substrate  100  makes contact with the connector terminal  110  while functioning as a position restriction pin which restricts a position of the ink cartridge  90 . That is to say, since the movement member  95  is a position restriction pin, by adding a function as a movement member to the position restriction pin, the circuit substrate  100  can be moved from the position at which the circuit substrate  100  is separated from the connector terminal  110  to the position at which the circuit substrate  100  makes contact with the connector terminal  110  when the ink cartridge  90  is attached to the cartridge holder  80 . Accordingly, the movement member  95  is not required to be separately provided in addition to the position restriction pin. This makes it possible to suppress an apparatus from being increased in size. 
     With this configuration, by providing the convex portion  95   b  to the position restriction pin as the movement member  95 , the circuit substrate  100  can be moved from the position at which the circuit substrate  100  is separated from the connector terminal  110  to the position at which the circuit substrate  100  makes contact with the connector terminal  110  when the ink cartridge  90  is attached to the cartridge holder  80 . Further, the position restriction hole  98  of the ink cartridge  90  includes a concave portion corresponding to the convex portion  95   b . Therefore, the movement member  95  can be moved along the concave portion. Accordingly, the position restriction pin can be operated as the movement member  95  with a simple configuration. 
     With this configuration, when the ink cartridge  90  is attached to the cartridge holder  80 , the circuit substrate  100  rotationally operates from a state where the circuit substrate  100  is tilted with respect to the attachment direction at a predetermined angle to a state where the circuit substrate  100  is in parallel with the attachment direction. Therefore, a rotational movement mechanism of the circuit substrate  100  is easily accommodated in the ink cartridge main body  91 . To be more specific, a moving space of the circuit substrate  100  can be made smaller in comparison with a case where the circuit substrate  100  is not rotationally operated (for example, a configuration in which the circuit substrate  100  is moved in a slide manner). Therefore, a space for providing a slide mechanism is not required. This makes it possible to suppress an apparatus from being increased in size. 
     With the ink cartridge  90  according to the embodiment, the circuit substrate  100  can be made not to be in contact with any portions until the circuit substrate  100  makes contact with the connector terminal  110  since the ink cartridge  90  is used in the above liquid ejecting system  1 . Accordingly, the ink cartridge  90  which eliminates an electrical conduction failure between the circuit substrate  100  and the connector terminal  110  and can ensure a normal printing operation can be provided. 
     With the printer main body  2  according to the embodiment, the connector terminals  110  can be made not to be in contact with any portions until the circuit substrate  100  makes contact with the connector terminal  110  since the printer main body  2  is used in the above liquid ejecting system  1 . Accordingly, the printer main body  2  which eliminates an electrical conduction failure between the circuit substrate  100  and the connector terminal  110  and can ensure a normal printing operation can be provided. 
     In the embodiment, the movement member  95  makes contact with the guiding portion  108  of the circuit substrate  100  so as to move the circuit substrate  100 . However, the configuration is not limited thereto. For example, the movement member  95  may move the circuit substrate  100  without making contact with the guiding portion  108 . To be more specific, magnetic members such as magnets are used for the movement member  95  and the guiding portion  108  and the circuit substrate  100  can be moved with a magnetic force generated between the movement member  95  and the guiding portion  108  even in a case where the movement member  95  and the circuit substrate  100  are separated from each other. 
     At this time, a force attracting each other may act between the movement member  95  and the guiding portion  108  (for example, magnets having polarities opposite to each other may be used). Alternatively, a force repelling each other may act between the movement member  95  and the guiding portion  108  (for example, magnets having the same polarity may be used). When the force attracting each other acts between the movement member  95  and the guiding portion  108 , a magnetic member is arranged at the side at which the connector terminal  110  is arranged (upper side (+Z direction side) with respect to the supporting shaft  107  of the circuit substrate  100 ). When the force repelling each other acts between the movement member  95  and the guiding portion  108 , a magnetic member is arranged at a side opposite to the side at which the connector terminal  110  is arranged (lower side (−Z direction side) with respect to the supporting shaft  107  of the circuit substrate  100 ). Thus, a magnetic force is required to act therebetween such that the circuit substrate  100  is made closer to the connector terminal  110 . 
     In the embodiment, the circuit substrate  100  is attached to an end of the ink cartridge main body  91  at the +Z direction side. However, the configuration is not limited thereto. For example, the circuit substrate  100  may be attached to an end of the ink cartridge main body  91  at the −Z direction side or attached to an end of the ink cartridge main body  91  at the +X direction side or an end thereof at the −X direction side. That is to say, it is sufficient that the circuit substrate  100  is movably provided on a side face of the ink cartridge main body  91 , which is in parallel with the attachment direction. 
     In the embodiment, a base end of the connector terminal  110  is supported by a face of the wall body  81   b  on the +Y direction side. However, the configuration is not limited thereto. For example, a rear face of the connector terminal  110  (face opposite to the side at which the contact portion  110   a  is formed) may be supported by a face of the ceiling plate  81   c  at the −Z direction side. That is to say, it is sufficient that the connector terminal  110  is arranged at a position corresponding to a position at which the circuit substrate  100  is arranged and fixed to a side face of the cartridge holder  80 , which is in parallel with the attachment direction. 
     In the embodiment, the movement member  95  is formed such that the main body  95   a  is circular and the convex portion  95   b  is rectangular when seen from the front side. However, the shape of the movement member  95  is not limited thereto. For example, the shape of the movement member  95  (main body  95   a , convex portion  95   b ) may be various shapes such as a circular shape, an elliptical shape, a rectangular shape, a star shape or a shape obtained by combining these shapes. 
     In the embodiment, a case where the circuit substrate  100  rotationally moves about the supporting shaft  107  has been described as an example. However, the configuration is not limited to the case. Hereinafter, a movement mechanism of the circuit substrate, which is different from that in the embodiment, is described with reference to  FIG. 11  and  FIG. 12 . 
     Second Embodiment 
       FIG. 11  is a schematic view illustrating a circuit substrate and an attachment portion thereof according to the second embodiment.  FIG. 12  is a schematic plan view illustrating a connector terminal and a movement member according to the second embodiment.  FIG. 11  corresponds to  FIG. 8  and illustrates a side end (end at the +Z direction side) of the ink cartridge  90 , which is in parallel with the downstream side (−Y direction side) in the attachment direction. 
       FIG. 12  corresponds to  FIG. 9  and illustrates a side end (end at the −Z direction side) of the cartridge holder  80 , which is in parallel with the downstream side (−Y direction side) in the attachment direction. A rotational movement configuration in the embodiment is different from that in the first embodiment in a point that the circuit substrate  100  slides based on the supporting shaft  107  as a base axis. In  FIG. 11  and  FIG. 12 , the same reference numerals denote the same components as those in  FIG. 8  and  FIG. 9  and detailed description thereof is not repeated. 
     As illustrated in  FIG. 11 , the circuit substrate  100  is movably provided on a side face (face at the +Z direction side) of the ink cartridge  90  (ink cartridge main body  91 ), which is in parallel with the attachment direction (−Y direction). Guide holes  109  which hold the supporting shaft  107  in a slidable manner are formed in the ink cartridge main body  91 . The guide holes  109  are elongated holes extended in the Z direction. The circuit substrate  100  slides along the guide holes  109  based on the supporting shaft  107  which supports the supporting portion  106  as a base axis. Both ends of the supporting shaft  107  are held by the guide holes  109  of the ink cartridge main body  91 . The circuit substrate  100  slides from a state where a surface which makes contact with the connector terminal  110  is located at a position in the −Z direction to a state where the surface is located at a position in the +Z direction when the ink cartridge  90  is attached to the cartridge holder  80 . In  FIG. 11 , the state in which the circuit substrate  100  is located at a position in the −Z direction is illustrated for convenience. 
     As illustrated in  FIG. 12 , a base end of a movement member  195  is supported by a surface of the wall body  81   b  on the +Y direction side. The movement member  195  is arranged at a position facing the connector terminal  110  so as to be separated therefrom by a predetermined distance. The movement member  195  includes a main body  195   a  and a convex portion  195   b . The convex portion  195   b  makes contact with the circuit substrate  100  when the ink cartridge  90  is attached to the cartridge holder  80 . An end of the convex portion  195   b  of the movement member  195  at the upstream side in the attachment direction is sloped in a tapered form. The height of the convex portion  195   b  (a distance from an upper surface of the main body  195   a  to a top of the convex portion  195   b ) is substantially the same as the length of the guide holes  109  of the ink cartridge main body  91 . The movement member  195  moves the circuit substrate  100  from a position at which the circuit substrate  100  is separated from the connector terminal  110  to a position at which the circuit substrate  100  makes contact with the connector terminal  110  when the ink cartridge  90  is attached to the cartridge holder  80 . 
       FIGS. 13A through 13C  are schematic cross-sectional views illustrating a moving state of the circuit substrate  100  in the second embodiment.  FIG. 13A  is a view illustrating a state before the ink cartridge  90  is attached to the cartridge holder  80  and corresponds to  FIG. 10A .  FIG. 13B  is a view illustrating a state when the ink cartridge  90  is being attached to the cartridge holder  80  and corresponds to  FIG. 10B .  FIG. 13C  is a view illustrating a state after the ink cartridge  90  is completely attached to the cartridge holder  80  and corresponds to  FIG. 10C . In  FIGS. 13A through 13C , a position restriction hole into which the movement member  195  is inserted is not illustrated for sake of convenience. 
     Then, a moving state of the circuit substrate  100  is describe in which the circuit substrate  100  is moved from the position at which the circuit substrate  100  is separated from the connector terminal  110  to the position at which the circuit substrate  100  makes contact with the connector terminal  110  when the ink cartridge  90  is attached to the cartridge holder  80 . 
     At first, as illustrated in  FIG. 13A , a state before the ink cartridge  90  is attached to the cartridge holder  80 , that is, a state before the movement member  195  makes contact with the circuit substrate  100  is considered. In this case, the circuit substrate  100  is lowered in the −Z direction by a predetermined distance. To be more specific, a posture of the circuit substrate  100  is held by a holding member (not shown) such as a stopper in a state where an end thereof (end at the −Z direction side) gets into the ink cartridge main body  91 . A tapered portion of the convex portion  195   b  of the movement member  195  is located at a position facing a tapered portion of the guiding portion  108  of the circuit substrate  100 . The projection portion  105  is separated from the contact portion  110   a  of the connector terminal  110  by a predetermined distance. 
     Next, as illustrated in  FIG. 13B , a state when the ink cartridge  90  is being attached to the cartridge holder  80 , that is, a state when the movement member  195  makes contact with the circuit substrate  100  to move the circuit substrate  100  is considered. The tapered portion of the convex portion  195   b  of the movement member  195  is located at a position facing the tapered portion of the guiding portion  108  of the circuit substrate  100  in a state before the ink cartridge  90  is attached to the cartridge holder  80 . Therefore, the movement member  195  is inserted into the position restriction hole (not shown), and thereafter, if the movement member  195  makes contact with the guiding portion  108  at the lower side of the circuit substrate  100  and moves in the attachment direction, the circuit substrate  100  slides in the +Z direction based on the supporting shaft  107  as a base axis. That is to say, the circuit substrate  100  slides from a state where the circuit substrate  100  is separated with respect to the attachment direction by a predetermined distance to a state such that the distance becomes smaller. 
     Both of an end of the guiding portion  108  at the downstream side in the attachment direction and an end of the convex portion  195   b  of the movement member  195  at the upstream side in the attachment direction are sloped in a tapered form. Therefore, the circuit substrate  100  slides smoothly. 
     The projection portion  105  is separated from the contact portion  110   a  by a predetermined distance in a state before the ink cartridge  90  is attached to the cartridge holder  80 . Therefore, the projection portion  105  does not make contact with any portions during the movement of the movement member  195 . Further, the contact portion  110   a  does not make contact with any portions until the contact portion  110   a  makes contact with the electrode pad  101   a.    
     As illustrated in  FIG. 10C , a state after the ink cartridge  90  is completely attached to the cartridge holder  80  is considered. In this case, the circuit substrate  100  is in a state where the circuit substrate  100  has moved up in the +Z direction. That is, the electrode pad  101   a  of the circuit substrate  100  makes contact with the contact portion  110   a  of the connector terminal  110 . Therefore, the memory element  102  and the remaining amount detection sensor are electrically connected to the control circuit in the printer main body  2  through the circuit substrate  100 . This makes it possible to control operations of the memory element  102  and the remaining amount detection sensor from the side of the printer main body  2 . 
     Third Embodiment 
     A liquid ejecting system  1  according to the embodiment includes a liquid ejecting head  21   a , ink cartridges  90  (ink cartridge main bodies  91 ) (see,  FIG. 16 ), a cartridge holder  80 , first circuit substrates  300  (see,  FIG. 16 ), first connector terminals  121 , and movement members  295 . The liquid ejecting head  21   a  ejects ink (liquid). The ink cartridges  90  (ink cartridge main bodies  91 ) accommodate the ink. The ink cartridges  90  are detachably attached to the cartridge holder  80 . The first circuit substrates  300  are fixed to side faces of the ink cartridges  90 , which are along an attachment direction in which the ink cartridges  90  are attached to the cartridge holder  80  (hereinafter, referred to as attachment direction). The first connector terminals  121  are movably provided on a side face of the cartridge holder  80 , which is in parallel with the attachment direction. The movement members  295  are provided on the ink cartridges  90  at the downstream side in the attachment direction. Further, the movement members  295  move the first connector terminals  121  from positions at which the first connector terminals  121  are separated from the first circuit substrates  300  to positions at which the first connector terminals  121  make contact with the first circuit substrates  300  when the ink cartridges  90  are attached to the cartridge holder  80 . 
     The printer main body  2  includes the liquid ejecting head  21   a , the cartridge holder  80  and the first connector terminals  121  and is used in the liquid ejecting system  1 . That is to say, the printer main body  2  is an apparatus obtained by removing the ink cartridges  90  from the liquid ejecting system  1 . Each ink cartridge  90  includes the ink cartridge main body  91 , the first circuit substrate  300 , and the movement member  295 , and is used in the liquid ejecting system  1 . 
       FIG. 14  is a perspective view illustrating the cartridge holder  80  to which a liquid accommodating container is attached.  FIG. 15  is a front view illustrating the cartridge holder  80  as illustrated in  FIG. 14 . 
     Pairs of positioning pins  285   a ,  285   b , air communication ports  86 , ink supply pins  87 , identification members  88   a  through  88   e  are provided on a wall body  81   b  of cartridge slots  89 A through  89 E. Second circuit substrates  310  are fixed to the wall body  81   b  of the cartridge slots  89 A through  89 . The second circuit substrates  310  are electrically connected to the first circuit substrates  300  (see,  FIG. 16 ) which are provided in the ink cartridges  90 . 
     The pairs of positioning pins  285   a ,  285   b  are provided on upper and lower portions in the cartridge slots  89 A through  89 E, respectively. The pairs of positioning pins  285   a ,  285   b  are members for positioning the ink cartridges  90 . 
     The air communication ports  86  are provided to be close to the positioning pins  285   b  at lower sides in the cartridge slots  89 A through  89 E. The air communication ports  86  are ports for supplying the air to the pairs of positioning pins  285   a  located at an upper position and  285   b  located at a lower position, and the ink cartridges  90 . Each pair of positioning pins  285   a ,  285   b  are inserted into positioning holes  298 ,  299  of each ink cartridge  90 , respectively. 
     The ink supply pins  87  are provided to be close to the positioning pin  285   a  at upper sides in the cartridge slots  89 A through  89 E. The ink supply pins  87  are pins for supplying inks from the ink cartridges  90  to the liquid ejecting head  21   a  (see,  FIG. 1 ) through the ink tubes  25  (see,  FIG. 1 ). 
     The identification members  88   a  through  88   e  are provided in the cartridge slots  89 A through  89 E, respectively. The identification members  88   a  through  88   e  are provided at positions between the positioning pins  285   a  at the upper sides and the air communication ports  86 . The identification members  88   a  through  88   e  are members for preventing the ink cartridges  90  from being mistakenly attached. 
     The second circuit substrates  310  are made to be in contact with the first circuit substrates  300  provided in the ink cartridges  90  so as to be electrically connected thereto when the ink cartridges  90  are attached to the cartridge slots  89 A through  89 E. Detailed configurations of the first circuit substrates  300  and the second circuit substrates  310  are described below. 
       FIG. 16  is a perspective view illustrating the ink cartridge  90 .  FIG. 17  is an exploded perspective view illustrating the ink cartridge  90  as illustrated in  FIG. 16 . 
     As illustrated in  FIG. 16  and  FIG. 17 , each ink cartridge  90  includes a flattened ink cartridge main body (liquid accommodating container main body)  91  having a substantially rectangular parallelepiped shape, the first circuit substrate  300  and the movement member  295 . 
     The pair of positioning holes  298 ,  299  are provided in a front face (face at the −Y direction side) of the ink cartridge  90  so as to be separated from each other. 
     Positioning by the positioning holes  298 ,  299  and the above pairs of positioning pins  285   a ,  285   b  is described. If the ink cartridges  90  are inserted into the cartridge slots  89 A through  89 E, front ends of the positioning pins  285   a ,  285   b  are fitted into the positioning holes  298 ,  299 , respectively. Thereafter, if the ink cartridges  90  are further inserted to inner sides of the cartridge slots  89 A through  89 E, the ink cartridges  90  move based on the positioning pins  285   a ,  285   b.    
     If the ink cartridges  90  are completely attached to the cartridge slots  89 A through  89 E, the positioning holes  298 ,  299  and the pairs of the positioning pins  285   a ,  285   b  are fitted, respectively. Thus, positions of the ink cartridges  90  in the direction along the front end faces thereof are determined so that the movements of the ink cartridges  90  are restricted. 
     Each of one positioning holes  298  is set to be a shape (circular) substantially corresponding to a cross-sectional shape perpendicular to an axial direction of the positioning pin  285   a  at the upper side. Each of the other positioning holes  299  is set to be a shape substantially corresponding to a cross-sectional shape perpendicular to an axial direction of the positioning pin  285   b  at the lower side. That is, the positioning hole  299  is set to be an elongated hole in the height direction (Z direction) of the ink cartridge main body  91 . By setting each of the other positioning holes  299  to be an elongated hole in such a manner, a dimensional tolerance or the like can be easily allowed while keeping the positioning accuracy. 
     The first circuit substrate  300  is fixed to a side face (face at the +Z direction side) of the ink cartridge  90  (ink cartridge main body  91 ) along the attachment direction (−Y direction). In other words, the first circuit substrate  300  is fixed to a side face of the ink cartridge  90 , which is in parallel with the attachment direction. It is to be noted that being in “parallel” with the attachment direction includes both of a case of being in perfectly parallel with the attachment direction and a case of being in substantially parallel with the attachment direction. The first circuit substrate  300  is provided at a position close to the movement member  295 . 
       FIG. 18  is a schematic cross-sectional view illustrating the first circuit substrate  300  and an attachment portion thereof.  FIG. 18  illustrates a side end (end at the +Z direction side) of the ink cartridge  90 , which is in parallel with the downstream side (−Y direction side) in the attachment direction. 
     As illustrated in  FIG. 18 , the first circuit substrate  300  is attached in a concave portion  303  formed at a side end (end at the +Z direction side) of the ink cartridge main body  91 . Therefore, a position of the first circuit substrate  300  is defined. A first electrode pad  300   a  which is electrically connected to the first connector terminal  121  (see,  FIG. 19 ), which will be described later, is formed in a surface (surface at the +Z direction side) of the first circuit substrate  300 . The first electrode pad  300   a  is electrically connected to the above remaining amount detection sensor. A circuit pattern (not shown) is formed and electrically connected with the first electrode pad  300   a . The circuit pattern is covered by a solder resist film (not shown), for example. A memory element  301  such as EEPROM is mounted on a rear face (face at the −Z direction) of the first circuit substrate  300 . The memory element  301  is a member for recording pieces of information such as an ink remaining amount and a use history of the cartridge, for example. The memory element  301  is firmly fixed to the rear face of the first circuit substrate  300  with a mold resin  302 . 
     The movement member  295  is provided in a corner portion of the ink cartridge main body  91  at the downstream side (at the −Y direction side) in the attachment direction. The movement member  295  moves the first connector terminal  121  (see,  FIG. 19 ) from a position at which the first connector terminal  121  is separated from the first circuit substrate  300  to a position at which the first connector terminal  121  makes contact with the first circuit substrate  300  when the ink cartridge  90  is attached to the cartridge holder  80 . 
     A projection portion  105  is formed between the first circuit substrate  300  and the movement member  295  on a side end of the ink cartridge main body  91  (end at the +Z direction side). The projection portion  105  is formed so as to project to a surface side (+Z direction side) of the first circuit substrate  300 . The projection portion  105  functions for preventing the end (end at the −Y direction side) of the first circuit substrate  300  from making contact with the first connector terminal  121  (see,  FIG. 19 ) which will be described later. To be more specific, when the substrate main body of the first circuit substrate  300  is formed with a glass epoxy material, if the first connector terminal  121  makes direct contact with the first circuit substrate  300 , the following problem arises. That is, a problem that the end of the first circuit substrate  300  is chipped off or being the like and damaged is generated. Therefore, it is so configured that the end of the first circuit substrate  300  does not make contact with the first connector terminal  121 . 
     The liquid ejecting system  1  according to the invention includes the first circuit substrates  300 , the first connector terminals  121  and the movement members  295 . The first circuit substrates  300  are fixed to side faces of the ink cartridge main bodies  91 , which are in parallel with the attachment direction. The first connector terminals  121  are movably provided on a side face of the cartridge holder  80 , which is in parallel with the attachment direction. The movement members  295  are provided in the ink cartridge main bodies  91  at the downstream side in the attachment direction. Then movement members  295  move the first connector terminals  121  from positions at which the first connector terminals  121  are separated from the first circuit substrate  300  to positions at which the first connector terminals  121  make contact with the first circuit substrate  300  when the ink cartridge main bodies  91  are attached to the cartridge holder  80 . With this, an electrical conduction failure between the first circuit substrates  300  and the first connector terminals  121  is eliminated and a normal printing operation can be ensured in the liquid ejecting system  1 . Hereinafter, the first connector terminal  121  and an attachment portion thereof are described in detail with reference to  FIG. 19 . 
       FIG. 19  is a schematic cross-sectional view illustrating the first connector terminal  121  and the attachment portion thereof.  FIG. 19  illustrates a side end (end at the −Z direction side) of the cartridge holder  80 , which is in parallel with the downstream side (−Y direction side) in the attachment direction. 
     As illustrated in  FIG. 19 , the first connector terminal  121  is movably provided on a side face of the cartridge holder  80 , which is in parallel with the attachment direction. To be more specific, the first connector terminal  121  is provided on a face (face at the −Z direction side) of a rotational substrate  123  at the upstream side (+Y direction side) with respect to a supporting shaft  124  in the attachment direction. The rotational substrate  123  constitutes a rotational member  120  which rotationally moves about the supporting shaft  124  as a center axis. The first connector terminal  121  rotationally operates from a state where a surface which makes contact with the first circuit substrate  300  is tilted with respect to the attachment direction (−Y direction) to a state where the surface is in parallel with the attachment direction when the ink cartridge  90  is attached to the cartridge holder  80 . 
     The first connector terminal  121  is formed with an elastic metal material such as copper. A first contact portion  121   a  which is electrically connected to the first electrode pad  300   a  of the first circuit substrate  300  is formed on a surface (surface at the −Z direction side) of the first connector terminal  121 . The first contact portion  121   a  is provided at a position corresponding to the first electrode pad  300   a . The supporting shaft  124  is a bar-shaped member extended in the X direction and is positioned at a center portion of the rotational substrate  123 . Both ends of the supporting shaft  124  are fixed to the cartridge holder  80 . 
     The second circuit substrate  310  is fixed to a side face of the cartridge holder  80 , which is in parallel with the attachment direction. To be more specific, a base end of the second circuit substrate  310  is supported by and fixed to a face of the wall body  81   b  on the +Y direction side. An opening  111  is formed in the second circuit substrate  310  at the +Y direction side. Therefore, the rotational member  120  can freely rotationally move from a state where the rotational member  120  is tilted with respect to the attachment direction at a predetermined angle to a state where the rotational member  120  is in parallel with the attachment direction. A second electrode pad  310   a  which is electrically connected to a second connector terminal  122 , which will be described later, is formed on a surface (surface at the −Z direction side) of the second circuit substrate  310 . 
     The second connector terminal  122  is movably provided on a side face of the cartridge holder  80 , which is in parallel with the attachment direction, and electrically connected with the first connector terminal  121 . The second connector terminal  122  moves from a position at which the second connector terminal  122  is separated from the second circuit substrate  310  to a position at which the second connector terminal  122  makes contact with the second circuit substrate  310  at the following timing. That is, the second connector terminal  122  moves as described above when the first connector terminal  121  moves from a position at which the first connector terminal  121  is separated from the first circuit substrate  300  to a position at which the first connector terminal  121  makes contact with the first circuit substrate  300 , when the ink cartridge  90  is attached to the cartridge holder  80 . 
     To be more specific, the second connector terminal  122  is provided on the other surface (surface at the +Z direction side) of the rotational substrate  123  at the downstream side (at the −Y direction side) with respect to the supporting shaft  124  in the attachment direction. The second connector terminal  122  rotationally operates from a state where a surface which makes contact with the second circuit substrate  310  is tilted with respect to the attachment direction (−Y direction) to a state where the surface is in parallel with the attachment direction when the ink cartridge  90  is attached to the cartridge holder  80 . 
     The second connector terminal  122  is formed with an elastic metal material such as copper like the first connector terminal  121 . The second connector terminal  122  is arranged so as to correspond to the second electrode pad  310   a  of the second circuit substrate  310 . A second contact portion  122   a  which is electrically connected to the second electrode pad  310   a  of the second circuit substrate  310  is formed on a surface (surface at the +Z direction side) of the second connector terminal  122 . The second contact portion  122   a  is provided at a position corresponding to the second electrode pad  310   a.    
     With such a configuration, when the ink cartridge  90  is attached to the cartridge holder  80 , the first electrode pad  300   a  of the first circuit substrate  300  makes contact with the first contact portion  121   a  of the first connector terminal  121 . In the same manner, the second electrode pad  310   a  of the second circuit substrate  310  makes contact with the second contact portion  122   a  of the second connector terminal  122 . Thus, a memory element  301  and a remaining amount detection sensor are electrically connected to a control circuit in the printer main body  2  through the first circuit substrate  300 . This makes it possible to control operations of the memory element  301  and a remaining amount detection sensor from the side of the printer main body  2 . 
       FIGS. 20A through 20C  are schematic cross-sectional views illustrating a moving state of the connector terminals  121 ,  122  in the third embodiment.  FIG. 20A  is a view illustrating a state before the ink cartridge  90  is attached to the cartridge holder  80 .  FIG. 20B  is a view illustrating a state when the ink cartridge  90  is being attached to the cartridge holder  80 .  FIG. 20C  is a view illustrating a state after the ink cartridge  90  is completely attached to the cartridge holder  80 . 
     When the ink cartridge  90  is attached to the cartridge holder  80 , the first connector terminal  121  is moved from a position at which the first connector terminal  121  is separated from the first circuit substrate  300  to a position at which the first connector terminal  121  makes contact with the first circuit substrate  300 . At the same time, the second connector terminal  122  is moved from a position at which the second connector terminal  122  is separated from the second circuit substrate  310  to a position at which the second connector terminal  122  makes contact with the second circuit substrate  310 . Hereinafter, moving states of the movement member  295  and the rotational member  120  will be described. 
     At first, as illustrated in  FIG. 20A , a state before the ink cartridge  90  is attached to the cartridge holder  80 , that is, a state before the movement member  295  makes contact with the rotational member  120  is considered. In this case, the rotational member  120  is tilted with respect to the attachment direction at a predetermined angle. To be more specific, a posture of the rotational member  120  is held by a holding member (not shown) such as a stopper in a state where an end thereof (end at the +Y direction side) gets into the opening  111 . The movement member  295  is positioned at a lower side (−Z direction side) with respect to the supporting shaft  124  of the rotational member  120 . The projection portion  105  is separated from the first contact portion  121   a  of the first connector terminal  121  by a predetermined distance. 
     Next, as illustrated in  FIG. 20B , a state when the ink cartridge  90  is being attached to the cartridge holder  80 , that is, a state when the movement member  295  makes contact with the rotational member  120  to move the rotational member  120  is considered. The movement member  295  is positioned at a lower side (−Z direction side) with respect to the supporting shaft  124  of the rotational member  120  in a state before the ink cartridge  90  is attached to the cartridge holder  80 . Therefore, if the movement member  295  makes contact with a lower side of the rotational member  120  and moves in the attachment direction, the rotational member  120  rotationally moves about the supporting shaft  124  in the clockwise direction. That is to say, the rotational member  120  rotationally moves from a state where the rotational member  120  is tilted with respect to the attachment direction at a predetermined angle to a state such that an angle gradient thereof becomes smaller. 
     The projection portion  105  is separated from the first contact portion  121   a  by a predetermined distance in a state before the ink cartridge  90  is attached to the cartridge holder  80 . Therefore, the projection portion  105  does not make contact with any portions during the movement of the movement member  295 . Further, the first contact portion  121   a  does not make contact with any portions until the first contact portion  121   a  makes contact with the electrode pad  300   a.    
     Therefore, even when there are dusts on a slide contact path as in the existing technique, a problem that the dusts adhere to the connector terminal and get into between the circuit substrate and the connector terminal is not generated. Further, even when a projection portion is formed on an attachment portion of the circuit substrate, a problem that a surface of the projection portion is rubbed with the connector terminal and the material of the projection portion is scratched off does not occur. 
     As illustrated in  FIG. 20C , a state after the ink cartridge  90  is completely attached to the cartridge holder  80  will be considered. In this case, the rotational member  120  is in parallel with the attachment direction. That is, the first electrode pad  300   a  of the first circuit substrate  300  makes contact with the first contact portion  121   a  of the first connector terminal  121 . In the same manner, the second electrode pad  310   a  of the second circuit substrate  310  makes contact with the second contact portion  122   a  of the second connector terminal  122 . Thus, the memory element  301  and the remaining amount detection sensor are electrically connected to the control circuit in the printer main body  2  through the first circuit substrate  300 . This makes it possible to control operations of the memory element  301  and the remaining amount detection sensor from the side of the printer main body  2 . 
     With the liquid ejecting system  1  according to the embodiment, when the ink cartridge  90  is attached to the cartridge holder  80 , the movement of the movement member  295  in the attachment direction makes the connector terminal  121  move from a position at which the connector terminal  121  is separated from the first circuit substrate  300  to a position at which the connector terminal  121  makes contact with the first circuit substrate  300 . Therefore, the first connector terminal  121  can be made not to be in contact with any portions until the first connector terminal  121  makes contact with the first circuit substrate  300 . Therefore, even when there are dusts on a slide contact path as in the existing technique, a problem that the dusts adhere to the connector terminal and get into between the circuit substrate and the connector terminal is not generated. Further, even when a projection portion is formed on an attachment portion of the circuit substrate, a problem that a surface of the projection portion is rubbed with the connector terminal and the material of the projection portion is scratched off is not generated. Accordingly, the liquid ejecting system  1  which eliminates an electrical conduction failure between the first circuit substrate  300  and the first connector terminal  121  and can ensure a normal printing operation can be provided. 
     With this configuration, when the ink cartridge  90  is attached to the cartridge holder  80 , the first connector terminal  121  rotationally operates from a state where the first connector terminal  121  is tilted with respect to the attachment direction at a predetermined angle to a state where the first connector terminal  121  is in parallel with the attachment direction. Therefore, a rotational movement mechanism of the first connector terminal  121  is easily accommodated in the cartridge holder  80 . To be more specific, a moving space of the first connector terminal  121  can be made smaller in comparison with a case where the first connector terminal  121  is not rotationally operated (for example, a configuration in which the first connector terminal  121  is moved in a slide manner). Therefore, a space for providing a slide mechanism is not required to be provided. This makes it possible to suppress an apparatus from being increased in size. 
     With this configuration, when the ink cartridge  90  is attached to the cartridge holder  80 , and when the first connector terminal  121  is moved by the movement of the movement member  295  in the attachment direction, the second connector terminal  122  is moved from a position at which the second connector terminal  122  is separated from the second circuit substrate  310  to a position at which the second connector terminal  122  makes contact with the second circuit substrate  310 . Therefore, the second connector terminal  122  can be made not to be in contact with any portions until the second connector terminal  122  makes contact with the second circuit substrate  310 . Accordingly, the liquid ejecting system  1  which eliminates an electrical conduction failure between the second circuit substrate  310  and the second connector terminal  122  and can ensure a normal printing operation can be provided. 
     With the printer main body  2  according to the embodiment, the first connector terminal  121  can be made not to be in contact with any portions until the first connector terminal  121  makes contact with the ink cartridge  90  since the printer main body  2  is used in the above liquid ejecting system  1 . Accordingly, the printer main body  2  which eliminates an electrical conduction failure in the first connector terminal  121  and can ensure a normal printing operation can be provided. 
     With the ink cartridge  90  according to the embodiment, the first connector terminal  121  can be made not to be in contact with any portions until the first connector terminal  121  makes contact with the first circuit substrate  300  since the ink cartridge  90  is used in the above liquid ejecting system  1 . Accordingly, the ink cartridge  90  which eliminates an electrical conduction failure between the first circuit substrate  300  and the first connector terminal  121  and can ensure a normal printing operation can be provided. 
     In the embodiment, the movement member  295  makes contact with the rotational member  120  so as to move the rotational member  120 . However, the configuration is not limited thereto. For example, the movement member  295  may move the rotational member  120  without making contact with the rotational member  120 . To be more specific, magnetic members such as magnets are used for the movement member  295  and the rotational member  120  so that the rotational member  120  can be moved with a magnetic force generated between the movement member  295  and the rotational member  120  even in a case where the movement member  295  and the rotational member  120  are separated from each other. 
     At this time, a force attracting each other may act between the movement member  295  and the rotational member  120  (for example, magnets having polarities opposite to each other may be used). Alternatively, a force repelling each other may act between the movement member  295  and the rotational member  120  (for example, magnets having the same polarity may be used). When the force attracting each other acts between the movement member  295  and the rotational member  120 , a magnetic member is arranged at the side at which the first connector terminal  121  of the rotational member  120  is arranged (right side (+Y direction side) with respect to the supporting shaft  124 ). When the force repelling each other acts between the movement member  295  and the rotational member  120 , a magnetic member is arranged at an opposite side to the side at which the first connector terminal  121  of the rotational member  120  is arranged (left side (−Y direction side) with respect to the supporting shaft  124 ). Thus, a magnetic force is required to act such that the first connector terminal  121  is made closer to the first circuit substrate  300 . 
     In the embodiment, the first circuit substrate  300  is attached to an end of the ink cartridge main body  91  at the +Z direction side. However, the configuration is not limited thereto. For example, the first circuit substrate  300  may be attached to an end of the ink cartridge main body  91  at the −Z direction side or attached to an end of the ink cartridge main body  91  at the +X direction side or an end thereof at the −X direction side. That is to say, it is sufficient that the first circuit substrate  300  is fixed on a side face of the ink cartridge main body  91 , which is in parallel with the attachment direction. 
     In the embodiment, a base end of the second circuit substrate  310  is supported by and fixed to a face of the wall body  81   b  on the +Y direction side. However, the configuration is not limited thereto. For example, a rear face of the second circuit substrate  310  (face opposite to the side at which the second electrode pad  310   a  is formed) may be supported by a face of the ceiling plate  81   c  at the −Z direction side. That is to say, it is sufficient that the second circuit substrate  310  is arranged at a position corresponding to the position at which the first circuit substrate  300  is arranged and fixed to a side face of the cartridge holder  80 , which is in parallel with the attachment direction. 
     In the embodiment, the first contact portion  121   a  of the first connector terminal  121  provided on the rotational member  120  is arranged at the same position in the attachment direction (one position when viewed with a cross section) and the first connector terminal  121  and the first circuit substrate  300  are electrically conducted to each other at one location. However, the configuration is not limited thereto. Hereinafter, an electrical conduction mechanism between the first connector terminal and the first circuit substrate, which is different from that in the embodiment, is described with reference to  FIGS. 21A and 21B  and  FIG. 22 . 
     Fourth Embodiment 
       FIGS. 21A and 21B  are schematic views illustrating a connector terminal and an attachment portion thereof according to the fourth embodiment.  FIG. 22  is a schematic plan view illustrating a first circuit substrate according to the fourth embodiment.  FIG. 21A  corresponds to  FIG. 19  and illustrates a side end (end at the −Z direction side) of the cartridge holder  80 , which is in parallel with the downstream side (−Y direction side) in the attachment direction.  FIG. 21B  is a plan view illustrating a rotational member  220  according to the fourth embodiment when seen from the side at which a first connector terminal  221  is arranged (−Z direction side). In the embodiment, the first connector terminal  221  is different from the first connector terminal  121  according to the third embodiment in a point that a plurality of contact portions arranged at positions which are different from each other in the attachment direction are included. In  FIGS. 21A and 21B , the same reference numerals denote the same components as those in  FIG. 19  and detailed description thereof is not repeated. 
     As illustrated in  FIGS. 21A and 21B , the first connector terminal  221  is movably provided on a side face of the cartridge holder  80 , which is in parallel with the attachment direction. To be more specific, the first connector terminal  221  is provided on a face (face at the −Z direction side) of a rotational substrate  223  at the upstream side (+Y direction side) with respect to a supporting shaft  224  in the attachment direction. The rotational substrate  223  constitutes the rotational member  220  which rotationally operates about the supporting shaft  224  as a center axis. The first connector terminal  221  rotationally moves from a state where a surface which makes contact with a first circuit substrate  200  (see,  FIG. 22 ) is tilted with respect to the attachment direction (−Y direction) to a state where the surface is in parallel with the attachment direction when the ink cartridge  90  is attached to the cartridge holder  80 . 
     A downstream side contact portion  221   a  and upstream side contact portions  221   b ,  221   c  are formed on a surface of the first connector terminal  221  (surface at the −Z direction side). The downstream side contact portion  221   a  is positioned at the downstream side in the attachment direction. The upstream side contact portions  221   b ,  221   c  are positioned at the upstream side in the attachment direction. A total of three contact portions including one downstream side contact portion  221   a  and two upstream side contact portions  221   b ,  221   c  positioned at the upstream side in the attachment direction are formed on the first connector terminal  221 . The height of the downstream side contact portion  221   a  is higher than the heights of the upstream side contact portions  221   b ,  221   c . The height of the downstream side contact portion  221   a  indicates a distance from a surface of the rotational member  220  to a top of the downstream side contact portion  221   a . The heights of the upstream side contact portions  221   b ,  221   c  indicate distances from a surface of the rotational member  220  to tops of the upstream side contact portions  221   b ,  221   c , respectively. The first connector terminal  221  is formed with an elastic metal material such as copper as in the above first connector terminal  121 . 
     As illustrated in  FIG. 22 , the first circuit substrate  200  includes a downstream side electrode pad  200   a  which is positioned at the downstream side in the attachment direction and upstream side electrode pads  200   b ,  200   c  which are positioned at the upstream side in the attachment direction. The first circuit substrate  200  includes a total of three electrode pads including one downstream side electrode pad  200   a  and two upstream side electrode pads  200   b ,  200   c . Each of the electrode pads  200   a ,  200   b ,  200   c  is electrically connected to a remaining amount detection sensor. A circuit pattern (not shown) is formed and electrically connected with the electrode pads  200   a ,  200   b ,  200   c . The circuit pattern is covered by a solder resist film  204 , for example. 
     Thus, the downstream side contact portion  221   a  which is electrically connected to the downstream side electrode pad  200   a , the upstream side contact portion  221   b  which is electrically connected to the upstream side electrode pad  200   b  and the upstream side contact portion  221   c  which is electrically connected to the upstream side electrode pad  200   c  are formed on the surface (surface at the −Z direction side) of the first connector terminal  221 . Note that the downstream side electrode pad  200   a , the upstream side electrode pad  200   b , and the upstream side electrode pad  200   c  are provided in the first circuit substrate  200 . The contact portions  221   a ,  221   b ,  221   c  are provided at positions corresponding to the electrode pads  200   a ,  200   b ,  200   c , respectively. 
     A second circuit substrate  310  is fixed to a side face of the cartridge holder  80 , which is in parallel with the attachment direction. An opening  111  is formed in the second circuit substrate  310  at the +Y direction side. A second electrode pad  310   a  which is electrically connected to a second connector terminal  222  is formed on a surface of the second circuit substrate  310  (surface at the −Z direction side). 
     The second connector terminal  222  is movably provided on a side face of the cartridge holder  80 , which is in parallel with the attachment direction, and electrically connected with the first connector terminal  221 . The second connector terminal  222  moves from a position at which the second connector terminal  222  is separated from the second circuit substrate  310  to a position at which the second connector terminal  222  makes contact with the second circuit substrate  310  at the following timing. That is, the second connector terminal  222  moves as described above when the first connector terminal  221  moves from a position at which the first connector terminal  221  is separated from the first circuit substrate  200  to a position at which the first connector terminal  221  makes contact with the first circuit substrate  200  when the ink cartridge  90  is attached to the cartridge holder  80 . 
     The second connector terminal  222  is formed with an elastic metal material such as copper like the first connector terminal  221 . The second connector terminal  222  is arranged so as to correspond to the second electrode pad  310   a  of the second circuit substrate  310 . A second contact portion  222   a  which is electrically connected to the second electrode pad  310   a  of the second circuit substrate  310  is formed on a surface (surface at the +Z direction side) of the second connector terminal  222 . The second contact portion  222   a  is provided at a position corresponding to the second electrode pad  310   a.    
     With this configuration, when the ink cartridge  90  is attached to the cartridge holder  80 , at first, the downstream side electrode pad  200   a  of the first circuit substrate  200  makes contact with the downstream side contact portion  221   a  of the first connector terminal  221 . Then, the upstream side electrode pads  200   b ,  200   c  of the first circuit substrate  200  make contact with the upstream side contact portions  221   b ,  221   c  of the first connector terminal  221 . In the same manner, the second electrode pad  310   a  of the second circuit substrate  310  makes contact with the second contact portion  222   a  of the second connector terminal  222 . Therefore, a memory element and a remaining amount detection sensor are electrically connected to a control circuit in the printer main body  2  through the first circuit substrate  200 . This makes it possible to control operations of the memory element and the remaining amount detection sensor from the side of the printer main body  2 . 
       FIGS. 23A through 23C  are schematic cross-sectional views illustrating moving states of the connector terminals  221 ,  222  according to the fourth embodiment.  FIG. 23A  corresponds to  FIG. 20A  and is a view illustrating a state before the ink cartridge  90  is attached to the cartridge holder  80 .  FIG. 23B  corresponds to  FIG. 20B  and is a view illustrating a state when the ink cartridge  90  is being attached to the cartridge holder  80 .  FIG. 23C  corresponds to  FIG. 20C  and is a view illustrating a state after the ink cartridge  90  is completely attached to the cartridge holder  80 . 
     When the ink cartridge  90  is attached to the cartridge holder  80 , the first connector terminal  221  is moved from a position at which the first connector terminal  221  is separated from the first circuit substrate  200  to a position at which the first connector terminal  221  makes contact with the first circuit substrate  200 . At the same time, the second connector terminal  222  is moved from a position at which the second connector terminal  222  is separated from the second circuit substrate  310  to a position at which the second connector terminal  222  makes contact with second circuit substrate  310 . Moving states of the movement member  295  and the rotational member  220  will be described next. 
     At first, as illustrated in  FIG. 23A , a state before the ink cartridge  90  is attached to the cartridge holder  80 , that is, a state before the movement member  295  makes contact with the rotational member  220  is considered. In this case, the rotational member  220  is tilted with respect to the attachment direction at a predetermined angle. The movement member  295  is positioned at a lower side (−Z direction side) with respect to the supporting shaft  224  of the rotational member  220 . The projection portion  105  is separated from the downstream side contact portion  221   a  of the first connector terminal  221  by a predetermined distance. 
     Next, as illustrated in  FIG. 23B , a state when the ink cartridge  90  is being attached to the cartridge holder  80 , that is, a state when the movement member  295  makes contact with the rotational member  220  to move the rotational member  220  is considered. The movement member  295  is positioned at a lower side (−Z direction side) with respect to the supporting shaft  224  of the rotational member  220  in a state before the ink cartridge  90  is attached to the cartridge holder  80 . Therefore, if the movement member  295  makes contact with a lower side of the rotational member  220  and moves in the attachment direction, the rotational member  220  rotationally moves about the supporting shaft  224  in the clockwise direction. That is to say, the rotational member  220  rotationally moves from a state where the rotational member  220  is tilted with respect to the attachment direction at a predetermined angle to a state such that an angle gradient thereof becomes smaller. 
     The projection portion  105  is separated from the downstream side contact portion  221   a  by a predetermined distance in a state before the ink cartridge  90  is attached to the cartridge holder  80 . Therefore, the projection portion  105  does not make contact with any portions during the movement of the movement member  295 . Further, the downstream side contact portion  221   a  does not make contact with any portions until the downstream side contact portion  221   a  makes contact with the downstream side electrode pad  200   a.    
     The height of the downstream side contact portion  221   a  is higher than the heights of the upstream side contact portions  221   b ,  221   c . Therefore, the downstream side contact portion  221   a  makes contact with the first circuit substrate  200  (downstream side electrode pad  200   a ) earlier than the upstream side contact portions  221   b ,  221   c  during the movement of the movement member  295 . 
     Therefore, the downstream side contact portion  221   a  can be made to be into electrically contact with the downstream side electrode pad  200   a  during the attachment before the ink cartridge  90  is completely attached to the cartridge holder  80 . Accordingly, a memory element and a remaining amount detection sensor are electrically connected to a control circuit in the printer main body  2  through the first circuit substrate  20  during the attachment. Accordingly, for example, pieces of information including an ink remaining amount, an ink expiration date, and adequacy of the ink cartridge  90  can be previously checked during the attachment. 
     As illustrated in  FIG. 23C , a state after the ink cartridge  90  is completely attached to the cartridge holder  80  is considered. In this case, the rotational member  220  is in parallel with the attachment direction. That is to say, the downstream side electrode pad  200   a  of the first circuit substrate  200  makes contact with the downstream side contact portion  221   a  of the first connector terminal  221 . The upstream side electrode pads  200   b ,  200   c  make contact with the upstream side contact portions  221   b ,  221   c . At this time, the height of the downstream side contact portion  221   a  is substantially the same as the heights of the upstream side contact portions  221   b ,  221   c . This is because the first connector terminal  221  is formed with an elastic metal material. In the same manner, the second electrode pad  310   a  of the second circuit substrate  310  makes contact with the second contact portion  222   a  of the second connector terminal  222 . Therefore, a memory element and a remaining amount detection sensor are electrically connected to a control circuit in the printer main body  2  through the first circuit substrate  200 . This makes it possible to control operations of the memory element and the remaining amount detection sensor from the side of the printer main body  2 . 
     With the liquid ejecting system  1  according to the embodiment, a plurality of contact portions  221   a ,  221   b ,  221   c  are formed on the first connector terminal  221  at positions which are different from each other in the attachment direction. Therefore, when the ink cartridge  90  is attached to the cartridge holder  80 , each of the contact portions  221   a ,  221   b ,  221   c  makes contact with the first circuit substrate  200  with a time interval. To be more specific, at first, the downstream side contact portion  221   a  and the downstream side electrode pad  200   a , which are provided so as to correspond to each other at the downstream side in the attachment direction, make contact with each other. Subsequently, the upstream side contact portions  221   b ,  221   c  and the upstream side electrode pads  200   b ,  200   c  make contact with each other, respectively. Therefore, before the ink cartridge  90  is completely attached to the cartridge holder  80 , various pieces of information (for example, an ink remaining amount, an ink expiration date, and adequacy of the ink cartridge  90 ) corresponding to each of the contact portions  221   a ,  221   b ,  221   c  can be previously acquired. 
     In the above embodiment, the posture of the rotational member is held by a holding member (not shown) such as a stopper in a state where an end thereof (end at the +Y direction side) gets into the opening portion. However, the configuration is not limited thereto. Hereinafter, a holding mechanism of the rotational member which is different from that in the above embodiment is described with reference to  FIGS. 24A and 24B . 
     Fifth Embodiment 
       FIGS. 24A and 24B  are schematic views illustrating a connector terminal and an attachment portion thereof according to the fifth embodiment.  FIG. 24A  corresponds to  FIG. 19  and illustrates a side end (end at the −Z direction side) of the cartridge holder  80 , which is in parallel with the downstream side (−Y direction side) in the attachment direction.  FIG. 24B  is a plan view illustrating a second circuit substrate  210  according to the fifth embodiment when seen from the side (−Z direction side) at which second electrode pads  210   a  are arranged. In the embodiment, the second circuit substrate  210  is different from the second circuit substrate  310  according to the third embodiment in a point that the second circuit substrate  210  has a function as a stopper which holds the posture of a rotational member. In  FIGS. 24A and 24B , the same reference numerals denote the same components as those in  FIG. 19  and detailed description thereof is not repeated. 
     As illustrated in  FIGS. 24A and 24B , a first connector terminal  321  is movably provided on a side face of the cartridge holder  80 , which is in parallel with the attachment direction. To be more specific, the first connector terminal  321  is provided on a face (face at the −Z direction side) of a rotational substrate  323  at the upstream side (+Y direction side) with respect to a supporting shaft  324  in the attachment direction. The rotational substrate  323  constitutes a rotational member  320  which rotationally operates about the supporting shaft  324  as a center axis. The first connector terminal  321  rotationally operates from a state where a surface which makes contact with the first circuit substrate  300  (see,  FIG. 25 ) is tilted with respect to the attachment direction (−Y direction) to a state where the surface is in parallel with the attachment direction when the ink cartridge  90  is attached to the cartridge holder  80 . 
     The first connector terminal  321  is formed with an elastic metal material such as copper. A first contact portion  321   a  which is electrically connected to a first electrode pad  300   a  of a first circuit substrate  300  is formed on a surface (surface at the −Z direction side) of the first connector terminal  321 . The first contact portion  321   a  is provided at a position corresponding to the first electrode pad  300   a . The supporting shaft  324  is a bar-shaped member extended in the X direction and is positioned at a center portion of the rotational substrate  323 . Both ends of the supporting shaft  324  are fixed to the cartridge holder  80 . 
     The second circuit substrate  210  is fixed to a side face of the cartridge holder  80 , which is in parallel with the attachment direction. To be more specific, the second circuit substrate  210  includes a stopper portion  212  which holds a posture of the rotational member  320  and a supporting portion  211  which supports the stopper portion  212 . A U-shaped groove  213  is formed between the stopper portion  212  and the supporting portion  211 . The stopper portion  212  can be elastically deformed based on a base end (end at the downstream side in the attachment direction) of the groove  213 . The second circuit substrate  210  is formed with an elastic insulating material, for example. The second electrode pads  210   a  which are electrically connected to a second connector terminal  322 , which will be described later, are formed on a surface (surface at the −Z direction side) of the second circuit substrate  210 . 
     A base end of the second circuit substrate  210  is supported by and fixed to a face of the wall body  81   b  on the +Y direction side. The second circuit substrate  210  is set to have a length such that an end thereof at the +Y direction side does not make contact with the rotational member  320 . Therefore, the rotational member  320  can be freely rotationally moved from a state where the rotational member  320  is tilted with respect to the attachment direction at a predetermined angle to a state where the rotational member  320  is in parallel with the attachment direction. 
     The second connector terminal  322  is movably provided on a side face of the cartridge holder  80 , which is in parallel with the attachment direction, and electrically connected with the first connector terminal  321 . The second connector terminal  322  becomes to be in contact with the second circuit substrate  210  while the first connector terminal  321  moves from a position at which the first connector terminal  321  is separated from the first circuit substrate  300  to a position at which the first connector terminal  321  makes contact with the first circuit substrate  300  when the ink cartridge  90  is attached to the cartridge holder  80 . 
     To be more specific, the second connector terminal  322  is provided on the other surface of the rotational substrate  323  (surface at the +Z direction) at the downstream side (at the −Y direction side) with respect to the supporting shaft  324  in the attachment direction. Second contact portions  322   a  which are electrically connected to the second electrode pads  210   a  of the second circuit substrate  210  are formed on a surface (surface at the +Z direction side) of the second connector terminal  322 . The second contact portions  322   a  are provided at positions corresponding to the second electrode pads  210   a . The heights of the second contact portions  322   a  are higher than the height of the second contact portion  122   a  according to the third embodiment. The heights of the second contact portions  322   a  indicate distances from a surface of the rotational member  320  to tops of the second contact portions  322   a . The height of the second contact portion  122   a  indicates a distance from a surface of the rotational member  120  to a top of the second contact portion  122   a . The second contact portions  322   a  make contact with the second circuit substrate  210  so that a posture of the rotational member  320  is held in a tilted state at a predetermined angle. 
     When the ink cartridge  90  is attached to the cartridge holder  80 , the second connector terminal  322  rotationally operates from a state where a surface which makes contact with the second circuit substrate  210  is tilted with respect to the attachment direction (−Y direction) to a state where the surface is in parallel with the attachment direction. 
     The second connector terminal  322  is formed with an elastic metal material such as copper like the first connector terminal  321  and is arranged so as to correspond to the second electrode pads  210   a  of the second circuit substrate  210 . 
     With such configuration, the second circuit substrate  210  functions as a stopper which holds a posture of the rotational member until the ink cartridge  90  is attached to the cartridge holder  80 . 
       FIGS. 25A through 25C  are schematic cross-sectional views illustrating moving states of the connector terminals  321 ,  322  according to the fifth embodiment.  FIG. 25A  is a view illustrating a state before the ink cartridge  90  is attached to the cartridge holder  80  and corresponds to  FIG. 20A .  FIG. 25B  is a view illustrating a state when the ink cartridge  90  is being attached to the cartridge holder  80  and corresponds to  FIG. 20B .  FIG. 25C  is a view illustrating a state after the ink cartridge  90  is completely attached to the cartridge holder  80  and corresponds to  FIG. 20C . 
     When the ink cartridge  90  is attached to the cartridge holder  80 , the first connector terminal  321  is moved from a position at which the first connector terminal  321  is separated from the first circuit substrate  300  to a position at which the first connector terminal  321  makes contact with the first circuit substrate  300 . At the same time, the second connector terminal  322  is moved in a state where the second connector terminal  322  is in contact with the second circuit substrate  210 . Moving states of the movement member  295  and the rotational member  320  will be described next. 
     At first, as illustrated in  FIG. 25A , a state before the ink cartridge  90  is attached to the cartridge holder  80 , that is, a state before the movement member  295  makes contact with the rotational member  320  is considered. In this case, the rotational member  320  is tilted with respect to the attachment direction at a predetermined angle. To be more specific, the second contact portions  322   a  are formed so as to make contact with the second circuit substrate  210  in a state where the rotational member  320  is tilted at a predetermined angle (heights of the second contact portions  322   a  become high). The stopper portion  212  is tilted to the −Z direction side. Therefore, a posture of the rotational member  320  is held by the stopper portion  212  of the second circuit substrate  210  in a state where an end thereof (end at the +Y direction side) ascends. The movement member  295  is positioned at the lower side (−Z direction side) with respect to the supporting shaft  324  of the rotational member  320 . The projection portion  105  is separated from the first contact portion  321   a  of the first connector terminal  321  by a predetermined distance. 
     Next, as illustrated in  FIG. 25B , a state when the ink cartridge  90  is being attached to the cartridge holder  80 , that is, a state when the movement member  295  makes contact with the rotational member  320  to move the rotational member  320  is considered. The movement member  295  is positioned at a lower side (−Z direction side) with respect to the supporting shaft  324  of the rotational member  320  in a state before the ink cartridge  90  is attached to the cartridge holder  80 . Therefore, if the movement member  295  makes contact with the rotational member  320  at the lower side and moves in the attachment direction, the rotational member  320  rotationally moves about the supporting shaft  324  in the clockwise direction. That is to say, the rotational member  320  rotationally moves from a state where the rotational member  320  is tilted with respect to the attachment direction at a predetermined angle to a state such that a gradient angle thereof becomes smaller. 
     The projection portion  105  is separated from the first contact portion  321   a  by a predetermined distance in a state before the ink cartridge  90  is attached to the cartridge holder  80 . Therefore, the projection portion  105  does not make contact with any portions during the movement of the movement member  295 . Further, the first contact portion  321   a  does not make contact with any portions until the first contact portion  321   a  makes contact with the first electrode pad  300   a.    
     As illustrated in  FIG. 25C , a state after the ink cartridge  90  is completely attached to the cartridge holder  80  is considered. In this case, the rotational member  320  is substantially in parallel with the attachment direction. At this time, the stopper portion  212  is in contact with the second contact portions  322   a  so as to be in a tilted state in the +Z direction side. That is, the first electrode pad  300   a  of the first circuit substrate  300  makes contact with the first contact portion  321   a  of the first connector terminal  321 . The second electrode pads  210   a  of the second circuit substrate  210  are in contact with the second contact portions  322   a  of the second connector terminal  322  in advance. Therefore, a memory element  301  and a remaining amount detection sensor are electrically connected to a control circuit in the printer main body  2  through the first circuit substrate  300 . This makes it possible to control operations of the memory element  301  and the remaining amount detection sensor from the side of the printer main body  2 . 
     The entire disclosure of Japanese Patent Application Nos. 2010-034749, filed Feb. 19, 2010, 2010-036946, filed Feb. 23, 2010 are expressly incorporated by reference herein.