Patent Publication Number: US-9403369-B2

Title: Flow channel member, liquid ejecting head, and liquid ejecting apparatus

Description:
The entire disclosure of Japanese Patent Application Nos. 2012-131407, filed Jun. 8, 2012, and 2013-065266, filed Mar. 26, 2013 are incorporated by reference herein. 
     TECHNICAL FIELD 
     The present invention relates to a flow channel member, a liquid ejecting head, and a liquid ejecting apparatus. 
     BACKGROUND ART 
     As an example of a liquid ejecting head, there is an ink jet type recording head which includes a head main body ejecting an ink, and a flow channel member having an ink flow channel supplying the ink to each nozzle opening of the head main body (for example, refer to PTL  1 ). For example, the head main body has a manifold where the ink is stored, directs the ink into each pressure generation chamber communicating with the manifold, and deforms the pressure generation chamber using power generation means such as a piezoelectric element so as to eject a liquid from nozzles. 
     As the flow channel member, there is one which includes a first member and a second member with a seal member interposed therebetween such that a closed space is formed between the surfaces of the first member and the second member, and the seal member. Within the closed space, an ink flow channel is configured such that a first flow channel disposed on the first member and a second flow channel disposed on the second member communicate with each other, and the opposing surfaces on the periphery of the ink flow channel are bonded to each other with an adhesive. 
     CITATION LIST 
     Patent Literature 
     [PTL 1] JP-A-2007-260948 
     SUMMARY OF INVENTION 
     Technical Problem 
     In such a flow channel member, there is a possibility that, due to a cured adhesive or changes in an environmental temperature, air inside the closed space may expand and infiltrate into the ink flow channel by passing through the adhesive. The air that has infiltrated into the ink flow channel may become bubbles, which may cause poor ink ejection. 
     Furthermore, in some cases, an outward open channel which discharges the air inside a head main body outward is disposed in the flow channel member. Specifically, a compliance substrate absorbing pressure changes inside a manifold and a compliance space so as not to inhibit deformation of the compliance substrate are disposed in the head main body. Thus, the flow channel member includes the one which has the outward open channel communicating outward. In such an ink jet type recording head, since the compliance space communicates outward via the outward open channel, the deformation of the compliance substrate is not inhibited. 
     The outward open channel is formed to meander within the flow channel member. If diffusion resistance is increased in the outward open channel by allowing such meandering, excessive evaporation of moisture is suppressed in the ink of the manifold. 
     However, in order to form the meandering outward open channel, it is necessary to provide a predetermined space in the flow channel member. Therefore, a problem arises that the ink jet type recording medium head may be increased in size. 
     The problem described above is similarly present even in the flow channel member mounted on other devices and is not limited to the flow channel member mounted on the ink jet type recording head. 
     The invention aims to provide a flow channel member, a liquid ejecting head, and a liquid ejecting apparatus which can suppress bubbles from being mixed into a liquid and can be decreased in size. 
     Solution to Problem 
     In order to solve the above problems, according to an aspect of the invention, there is provided a flow channel member which includes a first member having a first flow channel to be connected to liquid supply means for supplying a liquid; a second member having a second flow channel downstream from the first flow channel, and being joined to the first member; a first joining section arranged on joining surfaces where the first member and the second member oppose each other, enclosing openings of the first flow channel and the second flow channel; a second joining section arranged on the joining surfaces, and enclosing the first joining section; and an air chamber accumulating air between the first joining section and the second joining section, in which a communication channel allowing the air chamber to communicate outward is disposed inside at least any one of the first member and the second member. 
     In this aspect, the air inside the air chamber defined in the flow channel member comes to have the same pressure as that of the outside, and thereby expanding and high pressurizing due to changes in a temperature are suppressed. Therefore, it is possible to suppress infiltration of the air inside the air chamber into the first joining section, which results from a higher pressure than the outside, and to suppress permeation of the air into a liquid flow channel. Since the air is not mixed into the liquid flow channel in this manner, it is possible to supply the head main body with the liquid having no bubble mixed. In addition, since the flow channel member does not have a meandering air flow channel for imparting diffusion resistance, it is possible to decrease the flow channel member in size. 
     Here, it is preferable that the communication channel of the first member do not have a pressure adjustment section adjusting a pressure inside the air chamber, and the communication channel of the first member be capable of communicating with the pressure adjustment section disposed in the liquid supply means to be attached to the first member. Accordingly, since the liquid supply means is allowed to have the pressure adjustment section adjusting the pressure inside the air chamber, the pressure adjustment section may not be formed in the flow channel member. In this manner, it is possible to decrease the flow channel member in size. 
     In addition, it is preferable that the pressure adjustment section release the air outward and impart diffusion resistance to the circulating air. Accordingly, it is possible to adjust the pressure in the air chamber. 
     In addition, it is preferable that the first flow channel have a vertical flow channel penetrating the first member in a thickness direction and a horizontal flow channel disposed on the joining surfaces and communicating with the vertical flow channel. Accordingly, since the liquid flow channel has the horizontal flow channel, it is possible to shorten the length of the liquid flow channel in the thickness direction and thereby it is possible to decrease the size of the flow channel member in the thickness direction. 
     In addition, it is preferable that the first joining section have a higher air permeability or vapor permeability of a liquid than any one among the second joining section, the first member and the second member. Accordingly, it is possible to suppress permeation of water vapor, using the second joining section, the first member and the second member, by securing resistance to the liquid such that the liquid in the liquid flow channel may not leak out from the first joining section. 
     In addition, according to another aspect of the invention, there is provided a liquid ejecting head including the above-described flow channel member and a head main body. 
     In this aspect, it is possible to achieve the liquid ejecting head which can suppress the bubble mixing into the liquid and can be decreased in size. 
     In addition, it is preferable that the head main body have a plurality of nozzles ejecting a liquid, a manifold which becomes a common storage section for the liquid to be supplied to the nozzles, a flexible compliance section partially defining the manifold, and a compliance space disposed to oppose the compliance section, and the compliance space communicate with the air chamber. Accordingly, the compliance space communicates outward via the communication channel and the outward open channel. In this manner, it is possible to keep favorable deformation of the compliance section and to suppress excessive evaporation of the moisture of the liquid inside the manifold. 
     In addition, it is preferable that a flow channel communicating with the compliance space and the air chamber do not include a pressure adjustment section adjusting a pressure inside the air chamber. Accordingly, it is possible to decrease the size of the flow channel member since the pressure adjustment section is not disposed in the flow channel. 
     Furthermore, according to still another aspect of the invention, there is provided a liquid ejecting apparatus including the above-described liquid ejecting head. 
     In this aspect, it is possible to achieve the liquid ejecting apparatus which can suppress the bubble mixing into the liquid and can be decreased in size. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is an exploded perspective view illustrating a head according to Embodiment 1. 
         FIG. 2  is a top view illustrating a main portion of a flow channel member according to Embodiment 1. 
         FIG. 3  is a bottom view illustrating the main portion of the flow channel member according to Embodiment 1. 
         FIG. 4  is a cross-sectional view illustrating the flow channel member according to Embodiment 1. 
         FIG. 5  is a cross-sectional view illustrating the main portion of the flow channel member according to Embodiment 1. 
         FIG. 6  is a cross-sectional view illustrating the head according to Embodiment 1. 
         FIG. 7  is a perspective view illustrating an elastic member according to Embodiment 1. 
         FIG. 8  is a cross-sectional view illustrating a head main body according Embodiment 1. 
         FIG. 9  is an exploded perspective view illustrating a head according to Embodiment 2. 
         FIG. 10  is a top view illustrating a flow channel member according to Embodiment 2. 
         FIG. 11  is a bottom view illustrating the flow channel member according to Embodiment 2. 
         FIG. 12  is a cross-sectional view illustrating the head according to Embodiment 2. 
         FIG. 13  is a cross-sectional view illustrating a head according to Embodiment 3. 
         FIG. 14  is a cross-sectional view illustrating a main portion of a flow channel member according to Embodiment 4. 
         FIG. 15  is a cross-sectional view illustrating a head according to Embodiment 5. 
         FIG. 16  is a schematic diagram of a recording apparatus according to embodiments. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Embodiment 1 
     The invention will be described in detail based on exemplary embodiments. An ink jet type recording head is an example of a liquid ejecting head, and is also simply referred to as a head. An ink jet type recording apparatus is an example of a liquid ejecting apparatus. 
       FIG. 1  is an exploded perspective view of a head according to the present embodiment,  FIG. 2  is a top view illustrating a main portion of a flow channel member according to the embodiment,  FIG. 3  is a bottom view illustrating the main portion of the flow channel member according to the embodiment,  FIG. 4  is a cross-sectional view illustrating the flow channel member according to the embodiment, and  FIG. 5  is a cross-sectional view illustrating the main portion of the flow channel member according to the embodiment. 
     As illustrated in  FIG. 1 , a head  1  includes a flow channel member  90  which an ink cartridge  100 , a liquid storage unit storing an ink as a liquid, is attached to and detached from, and a head main body  10  fixed to the flow channel member  90 . 
     The flow channel member  90  includes an attachment member  50  (a first member) having a first flow channel  51  to be connected to the ink cartridge  100 , and a flow channel plate  80  (a second member) having a second flow channel  81  to be connected to the head main body  10 , and is provided with a liquid flow channel  95  with which the first flow channel  51  and the second flow channel  81  communicate. 
     The attachment member  50  has a cartridge mounting unit  52  (an opposite side surface to the head main body  10 ) on which the ink cartridge  100  is mounted. In the embodiment, four ink cartridges  100  are mounted on the cartridge mounting unit  52 . 
     The cartridge mounting unit  52  is configured such that the periphery thereof is surrounded by walls  53  where in a pair of mutually opposing wall surfaces of the walls  53 , one wall surface has a first engagement hole  54  penetrating in the thickness direction. In addition, the other wall  53  opposing one wall  53  having the first engagement hole  54  has a second engagement hole  55  penetrating in the thickness direction. A first engagement hook  104  and a second engagement hook  105  of the ink cartridge  100  engage with the first engagement hole  54  and the second engagement hole  55 . 
     The cartridge mounting unit  52  is provided with partitioning plates  56  partitioning a region on which four ink cartridges  100  are mounted. That is, in the cartridge mounting unit  52 , four regions are formed by three partitioning plates  56 . 
     As illustrated in  FIGS. 2, 4 and 5 , in each region of the cartridge mounting unit  52 , which is partitioned by the partitioning plates  56 , a first flow channel  51  is formed. The first flow channel  51  includes a vertical flow channel  51   a  penetrating the cartridge mounting unit  52  in the thickness direction (a stacking direction of the attachment member  50  and the flow channel plate  80 ) and a horizontal flow channel  51   b  communicating and being parallel with the vertical flow channel  51   a.    
     Specifically, a recess  57  is disposed on a surface of the cartridge mounting unit  52 . A cylindrical attachment portion  58  is disposed inside the recess  57 . The vertical flow channel  51   a  is formed inside the attachment portion  58 . A filter  59  is disposed so as to cross the vertical flow channel  51   a  in an opening on the attachment portion  58 . 
     As illustrated in  FIGS. 1, 4 and 5 , the flow channel plate  80 , an example of the second member, is a member with a flat plate shape and has the second flow channel  81  penetrating in the thickness direction. 
     Joining surfaces where the attachment member  50  and the flow channel plate  80  oppose each other are respectively referred to as a first joining surface  61  and a second joining surface  82 . That is, a surface to which the flow channel plate  80  of the attachment member  50  is joined is the first joining surface  61 , and a surface to which the attachment member  50  of the flow channel plate  80  is joined is the second joining surface  82 . 
     Specifically, as illustrated in  FIGS. 3, 4 and 5 , an accommodation section  65  which is a recess accommodating the flow channel plate  80  is disposed in the attachment member  50 . A surface to which the flow channel plate  80  of the accommodation section  65  is joined becomes the first joining surface  61 . 
     A groove-shaped recess  51   c  continuous to the vertical flow channel  51   a  is formed on the first joining surface  61 . If the flow channel plate  80  is joined to the first joining surface  61 , the recess  51   c  is sealed and thereby the horizontal flow channel  51   b  is formed by the recess  51   c  and the flow channel plate  80 . Then, if the first flow channel  51  (the horizontal flow channel  51   b ) communicates with the second flow channel  81  of the flow channel plate  80 , which is located downstream, the liquid flow channel  95  is formed. 
     A first joining section and a second joining section are formed on the first joining surface  61  and the second joining surface  82 , respectively. Here, the joining section represents a section where the first joining surface  61  and the second joining surface  82  are joined to each other. 
     The first joining section is arranged on the first joining surface  61  and the second joining surface  82 , and encloses the first flow channel  51  and the second flow channel  81 . In the embodiment, an adhesive  69  is used as the first joining section. 
     The second joining section is arranged on the first joining surface  61  and the second joining surface  82 , and encloses the first joining section. In the embodiment, a seal member  71  is used as the second joining section. 
     Specifically, these adhesive  69  and seal member  71  are configured as follows. 
     As illustrated in  FIGS. 3, 4 and 5 , on the first joining surface  61  of the attachment member  50 , a first annular boss portion  66  and a second annular boss portion  67  enclosing the outer side of the first boss portion  66  are disposed at an opening edge portion of the first flow channel  51  (the recess  51   c ). In the first boss portion  66  and the second boss portion  67 , any one top surface comes into contact with the second joining surface  82  of the flow channel plate  80 . 
     A lower bottom surface (a surface which does not come into contact with the second joining surface  82 ) located lower than the first boss portion  66  and the second boss portion  67  is disposed between the first boss portion  66  and the second boss portion  67 . The bottom surface, the first boss portion  66  and the second boss portion  67  form a first annular groove  68 . 
     The adhesive  69  is disposed inside the first groove  68 , and the first joining surface  61  of the attachment member  50  and the second joining surface  82  of the flow channel plate  80  are adhered using the adhesive  69 . 
     In this manner, the adhesive  69  (the first joining section) disposed in the first groove  68  is arranged between the first joining section  61  and the second joining section  82 , and encloses openings of the first flow channel  51  (the recess  51   c ) and the second flow channel  81 . Such disposing the adhesive  69  allows reliable sealing on a connecting surface between the first flow channel  51  and the second flow channel  81 . 
     Furthermore, a second annular groove  70  enclosing the first groove  68  is disposed at the outer side of the first groove  68  on the first joining surface  61 . The annular seal member  71  is fitted into the second groove  70 . The seal member  71  (the second joining section) disposed in the second groove  70  in this manner is arranged between the first joining surface  61  and the second joining surface  82 , and encloses the adhesive  69 . 
     If the seal member  71  encloses the adhesive  69  in this manner, an air chamber  85  is formed between the first joining surface  61  and the second joining surface  82 . That is, the air chamber  85  is a space formed between the adhesive  69  inside the first groove  68  and the seal member  71  inside the second groove  70 , and is a space between the first joining surface  61  and the second joining surface  82 . 
     In the embodiment, the first groove  68  and the second groove  70  are formed, and then the adhesive  69  and the seal member  71  are respectively arranged. However, the first groove  68  and the second groove  70  may not necessarily be formed. That is, the air chamber  85  may be directly formed using the adhesive  69  and the seal member  71 . 
     On the other hand, a communication channel  96  penetrating in the thickness direction is disposed at the attachment member  50 . The communication channel  96  allows the air chamber  85  to communicate outward. Specifically, the communication channel  96  is formed at the attachment member  50  by forming a through-hole so as to communicate with the air chamber  85 . The air chamber  85  is open to the outside atmosphere. Details of a configuration where the air chamber  85  is open to the atmosphere and operation effect will be described later. 
     Further, it is preferable that the adhesive  69  (the first joining section) have a higher air permeability or vapor permeability than any one among the seal member  71  (the second joining section), the attachment member  50  (the first member) and the flow channel plate  80  (the second member). Here, the air permeability means a property which allows the gas to permeate, but does not allow the liquid to permeate. In addition, the vapor permeability means a property which allows the vapor to permeate which is evaporated from moisture components and others of the ink (the liquid) flowing in the liquid flow channel  95 . 
     In general, the adhesive with ink resistance has the high air permeability and high vapor permeability. One with such a property is used as the adhesive  69 , whereas the other one with the lower air permeability and vapor permeability than the adhesive  69  is used as the seal member  71 , the attachment member  50  and the flow channel plate  80 . In case of this configuration, the adhesive  69  allows reliable ink resistance such that the ink does not leak out from the liquid flow channel  95 , and using the seal member  71  enables the vapor permeability to be suppressed. 
       FIG. 6  is a cross-sectional view illustrating the head to which the ink cartridge is attached. As illustrated in  FIG. 6 , the ink cartridge  100  is attached to the flow channel member  90 . 
     The ink cartridge  100  has a hollow box shape, and inside thereof, stores the ink (the liquid) to be supplied to the head main body  10 . A rib  101  with a cylindrical shape is disposed on the bottom surface of the ink cartridge  100 , and a supply port  102  supplying the ink inside the ink cartridge  100  to the flow channel member  90  is disposed at the inner side of the rib  101 . A supply portion  103  is disposed inside the supply port  102 . The supply portion  103  comes into pressurizing contact with the filter  59  of the flow channel member  90 , and supplies the ink inside the ink cartridge  100  to the liquid flow channel  95  of the flow channel member  90 . As such a supply portion  103 , it is possible to use, for example, porous materials or non-woven fabric such as cotton-like pulp, macromolecule absorbing polymer and urethane foam. 
     In addition, the ink cartridge  100  has the first engagement hook  104  to be inserted to the first engagement hole  54  disposed on the wall  53  of the attachment member  50 , and the second engagement hook  105  which is disposed at the opposite surface side to the first engagement hook  104  and to be inserted to the second engagement hole  55  on the wall  53  disposed on the wall  53  of the attachment member  50 . 
     The second engagement hook  105  is integrally formed with the ink cartridge  100  such that one end portion is fixed to the supply portion  103  side of a side surface of the ink cartridge  100  and the other end portion becomes a free end. In this manner, the second engagement hook  105  is elastically deformable toward the side surface of the ink cartridge  100 . 
     The ink cartridge  100  is attached to the attachment member  50  in the following manner. At first, the first engagement hook  104  side of the ink cartridge  100  is first obliquely inserted into the wall  53  of the attachment member  50  and then the first engagement hook  104  is inserted to the first engagement hole  54 . Next, in a state where the first engagement hook  104  of the ink cartridge  100  is inserted to the first engagement hole  54 , the ink cartridge  100  is rotated as a fulcrum of the first engagement hook  104 . In this manner, the ink cartridge  100  is inserted into the wall  53 . Then, the ink cartridge  100  is fixed to the cartridge mounting unit  52  of the flow channel member  90  by bringing the second engagement hook  105  into contact with the second engagement hole  55 . Detaching the ink cartridge  100  from the second engagement hole  55  is performed by elastically deforming the second engagement hook  105  to the ink cartridge  100  side. 
     The filter  59  covering the liquid flow channel  95  (the first flow channel  51 ) is disposed at the attachment portion  58  to which the ink cartridge  100  is connected. The filter  59  is intended to remove foreign substances or air bubbles contained in the ink. For example, it is possible to use a sheet-like one where a plurality of micro-pores is formed by finely knitted metal or resin fibers, or one where a plurality of micro-pore is allowed to penetrate a sheet-like metal or resin member and the like. Further, non-woven fabric may be used as the filter  59 , and the material used for the filter is not particularly limited. 
     In addition, as illustrated in  FIGS. 2, 5 and 6 , a diaphragm  62  dividing the recess  57  is disposed at the outer side of the attachment portion  58 . Within the recess  57 , an outer side recess divided by the diaphragm  62  is referred to as a groove for sealing  63  and an inner side recess divided by the diaphragm  62  is referred to as a groove for releasing atmosphere  64 . An annular elastic member  110  is attached to the groove for sealing  63 . Further, above-described communication channel  96  is open in the groove for releasing atmosphere  64 . 
       FIG. 7  is a perspective view illustrating an elastic member. The elastic member  110  is formed from elastic materials such as rubber and elastomer, and the cross-sectional shape thereof has a C-shape opening to the bottom side of the groove for sealing  63 . 
     Specifically, in the elastic member  110 , a second elastic portion  112  with a cylindrical shape is connected to the inner peripheral side of a first elastic portion  111  formed in a flat plate shape and an annular shape. In addition, a third elastic portion  113  with a cylindrical shape is connected to the outer peripheral side of the first elastic portion  111 . Then, the inner diameter of the second elastic portion  112  is sized for being in substantially close contact with the outer periphery of the attachment portion  58  and the diaphragm  62 . In addition, the inner diameter of the third elastic portion  113  is sized for being in substantially close contact with the inner periphery of the recess  57 . 
     As illustrated in  FIG. 6 , the elastic member  110  is attached to the groove for sealing  63  so as to accommodate the attachment portion  58  at the inner side of the second elastic portion  112  (refer to  FIG. 7 ). On the other hand, the rib  101  disposed in the ink cartridge  100  is annularly disposed opposing the elastic member  110 , and the supply portion  103  is located inside thereof. 
     In the ink cartridge  100  attached to the attachment member  50 , the supply portion  103  is in pressurizing contact with the filter  59 . In this manner, the supply port  102  of the ink cartridge  100  and the first flow channel  51  (the liquid flow channel  95 ) communicate with each other, and thereby the ink can be supplied from the ink cartridge  100  to the liquid flow channel  95 . In addition, the rib  101  is in pressurizing contact with the elastic member  110 . In such a manner that the elastic member  110  is elastically deformed, the reaction force improves airtightness between the rib  101  and the elastic member  110  and ensures a sealing property between the supply portion  103  and the first flow channel  51 . 
     The head main body  10  to which the ink is supplied by the ink cartridge  100  and the flow channel member  90  will be described.  FIG. 8  is a cross-sectional view of the head main body according to the embodiment. 
     The head main body  10  includes a flow channel formation substrate  12  which is an example of a flow channel substrate having a plurality of pressure generation chambers  11 , a nozzle plate  14  where a plurality of nozzles  13  communicating with each of the pressure generation chambers  11  is drilled, and a flow channel unit  16  provided with a vibrating plate  15  disposed on the opposite side surface to the nozzle plate  14  of the flow channel formation substrate  12 . The head main body  10  further includes a piezoelectric element unit  18  having a piezoelectric element  17  disposed in a region corresponding to each of the pressure generation chambers  11  on the vibrating plate  15 , and a case head  20  having an accommodation section  19  which is fixed onto the vibrating plate  15  and accommodates the piezoelectric element unit  18 . 
     In the flow channel formation substrate  12 , on a surface layer portion of one surface side thereof, the pressure generation chambers  11  are divided by diaphragms and juxtaposed in the width direction thereof in plural numbers. In the outer side of each row of the pressure generation chambers  11 , a manifold  22  to which the ink is supplied via an ink introduction channel  43  disposed at the case head  20  is disposed by penetrating the flow channel formation substrate  12  in the thickness direction. Then, the manifold  22  and each of the pressure generation chambers  11  communicate with each other via an ink supply channel  23 , and the ink is supplied to each of the pressure generation chambers  11  via the ink introduction channel  43 , the manifold  22  and the ink supply channel  23 . In addition, at the opposite end portion side to the manifold  22  of the pressure generation chambers  11 , a nozzle communication hole  24  penetrating the flow channel formation substrate  12  is formed. In the embodiment, the flow channel formation substrate  12  is configured to have a single crystal silicon substrate, and the above-described pressure generation chambers  11  disposed on the flow channel formation substrate  12  are formed by etching the flow channel formation substrate  12 . 
     The nozzle plate  14  in which nozzles  13  are drilled is joined to one surface side of the flow channel formation substrate  12 , and each of the nozzles  13  communicates with each of the pressure generation chambers  11  via the nozzle communication hole  24  disposed on the flow channel formation substrate  12 . 
     In addition, the vibrating plate  15  is joined to the other surface side of the flow channel formation substrate  12 , that is, the opening surface side of the pressure generation chambers  11 , and each of the pressure generation chambers  11  is sealed by the vibrating plate  15 . 
     For example, the vibrating plate  15  is formed to have an elastic film  25  formed from an elastic member such as a resin film and a composite plate with a support plate  26  formed from metal such as SUS, for example, which supports the elastic film  25 , and the elastic film  25  side is joined to the flow channel formation substrate  12 . 
     In addition, within a region opposing each of the pressure generation chambers  11  of the vibrating plate  15 , an island  27  with which a distal end of the piezoelectric element  17  comes into contact is disposed. A distal end surface of the piezoelectric element  17  is joined to the island  27  using the adhesive  30 . That is, a thin wall portion  28  having a thinner thickness than other regions is formed in a region opposing the peripheral portion of each of the pressure generation chambers  11  of the vibrating plate  15 , and each island  27  is disposed at the inner side of the thin wall portion  28 . In addition, in the embodiment, in a region opposing the manifold  22  of the vibrating plate  15 , similarly to the thinner wall portion  28 , the support plate  26  is removed by etching to dispose a compliance portion  29  configured to substantially have an elastic film only. Further, the compliance portion  29 , when a pressure change occurs inside the manifold  22 , absorbs the pressure change by deforming the elastic film  25  of the compliance portion  29 , and serves to usually maintain a constant pressure inside the manifold  22 . 
     The piezoelectric element  17  is integrally formed in one piezoelectric element unit  18 . That is, each piezoelectric element  17  is formed in such a manner that a piezoelectric element formation member  34  is formed in which a piezoelectric material  31 , electrode formation materials  32  and  33  are longitudinally and alternately pinched in a sandwich shape and stacked, and then the piezoelectric element formation member  34  is cut and divided to have a comb-like shape corresponding to each of the pressure generation chambers  11 . In other words, a plurality of piezoelectric elements  17  is integrally formed. Then, an inactive region which does not contribute to vibrations of the piezoelectric elements  17  (the piezoelectric element formation member  34 ), that is, a base end side of the piezoelectric elements  17  is firmly fixed to a fixed substrate  35 , and the piezoelectric elements  17  are fixed to the case head  20  via the fixed substrate  35 . 
     In addition, in the vicinity of the base end side of the piezoelectric elements  17 , a flexible wiring substrate  37  supplying signals for driving each of the piezoelectric elements  17  is connected to an opposite side surface to the fixed substrate  35 , and the piezoelectric elements  17  (the piezoelectric element formation member  34 ), the fixed substrate  35  and the flexible wiring substrate  37  configure the piezoelectric element unit  18 . 
     The accommodation section  19  penetrating in the thickness direction in a region relatively opposing the island  27  is disposed in the case head  20 . The entire piezoelectric element units  18  are accommodated in the accommodation section  19 . As described above, the distal end of the piezoelectric elements  17  comes into contact with the island  27  of the vibrating plate  15  to be fixed thereto, and the fixed substrate  35  is fixed to the case head  20  using the adhesive  39 . 
     A wiring substrate  41  having a plurality of conductive pads  40  to which each wiring  36  of the flexible wiring substrate  37  is individually connected is fixed onto the case head  20 , and the accommodation section  19  of the case head  20  is substantially closed by the wiring substrate  41 . In the wiring substrate  41 , an opening  42  with a slit shape is formed in a region opposing the accommodation section  19  of the case head  20 , and the flexible wiring substrate  37  is drawn outward of the accommodation section  19  from the opening  42  of the wiring substrate  41 . 
     For example, the flexible wiring substrate  37  is configured to have a chip on film (COF) on which a drive IC (not illustrated) for driving the piezoelectric elements  17  is mounted. Then, each wiring  36  of the flexible wiring substrate  37  is connected to the corresponding electrode formation materials  32  and  33  configuring the piezoelectric elements  17 , at the base end side, using solder, anisotropic conductive material or the like, for example. On the other hand, each wiring  36  is joined to each of the conductive pads  40  of the wiring substrate  41 , at the distal end side. Specifically, in a state where the distal end of the flexible wiring substrate  37 , which is drawn outward of the accommodation section  19  from the opening  42  of the wiring substrate  41 , is bent along the surface of the wiring substrate  41 , each wiring  36  is joined to each of the conductive pads  40  of the wiring substrate  41 . 
     The head main body  10  as described above is attached to the flow channel member  90  (refer to  FIGS. 1 and 4 ), and the ink introduction channel  43  is connected to the liquid flow channel  95 . That is, the ink is supplied to the manifold  22  from the ink cartridge  100  via the liquid flow channel  95  of the flow channel member  90  and the ink introduction channel  43 . Then, in the head main body  10 , the ink is distributed to each of the pressure generation chambers  11  via the ink supply channel  23 . In fact, applying a voltage to the piezoelectric elements  17  causes the piezoelectric elements  17  to contract. In this manner, the vibrating plate  15  is deformed along with the piezoelectric elements  17  so as to expand a volume in each of the pressure generation chambers  11 , and thereby the ink is drawn into the pressure generation chambers  11 . After the inside including the nozzles  13  is filled with the ink, the voltage applied to the electrode formation materials  32  and  33  of the piezoelectric elements  17  is released according to recording signals supplied via the wiring substrate  41 . In this manner, the piezoelectric elements  17  are stretched to return to their original state, and the vibrating plate  15  is also deformed to return to its original state. As a result, the volume in the pressure generation chambers  11  contracts to increase the pressure inside the pressure generation chambers  11 , and thereby ink droplets are ejected from the nozzles  13 . 
     In addition, a compliance space  45  is disposed in a region opposing the compliance portion  29  of the case head  20 . The compliance space  45  communicates with a connection channel  44  which is a through hole disposed at the case head  20 . Then, the connection channel  44  communicates outward via a gap between the head main body  10  and the attachment member  50 . 
     In this manner, since the compliance space  45  communicates outward, it is possible for the compliance portion  29  to be deformed well corresponding to a pressure change in the manifold  22 . 
     Here, with reference to  FIG. 6 , a configuration will be described in detail where the air chamber  85  defined in the flow channel member  90  is allowed to communicate outward via the communication channel  96 . 
     A pressure adjustment section is disposed in the ink cartridge  100 . The pressure adjustment section is a section having a function of adjusting a pressure in the air chamber  85 . More specifically, the section communicates with the air chamber  85  to release the air in the air chamber  85  outward, adjusts the pressure inside the air chamber  85  to an atmospheric pressure, and has a diffusion resistance to the air. 
     In the embodiment, as an example of the pressure adjustment section, an outward open channel  106  is disposed inside the ink cartridge  100 . 
     One opening of the outward open channel  106  is disposed at a position opposing the groove for releasing atmosphere  64  of the flow channel member  90 , and the other opening is disposed on the upper surface side of the ink cartridge  100  (the opposite side to the cartridge mounting unit  52 ). That is, the outward open channel  106  communicates with a space  86  (a space located inward from the joining surface between the rib  101  and the elastic member  110 , between the ink cartridge  100  and the attachment member  50 ) formed in such a manner that the rib  101  and the elastic member  110  are in pressurizing contact with each other, and allows the space  86  to be connected outward. 
     In addition, the outward open channel  106  is formed to be elongated and partially meandering. Since the outward open channel  106  is shaped like this, it is possible to increase the diffusion resistance to the air circulating in the outward open channel  106 . It is possible to optionally set the pressure in the air chamber  85  by adjusting the shape of the outward open channel  106  and appropriately setting the diffusion resistance. Further, the outward open channel  106  does not need the pressure adjustment section, but may be a flow channel allowing the air chamber  85  to communicate outward. 
     If the ink cartridge  100  is attached to the attachment member  50  in this manner, the outward open channel  106  communicates with the communication channel  96  which is open in the groove for releasing atmosphere  64  of the flow channel member  90 . That is, the air chamber  85  communicates outward via the communication channel  96 , the groove for releasing atmosphere  64  and the outward open channel  106  in this order. 
     In this manner, in the head  1  according to the embodiment, the air chamber  85  communicates outward via the communication channel  96  and the outward open channel  106 , and the internal pressure thereof is adjustable. Therefore, it is possible to maintain a constant pressure by suppressing that temperature changes causes the inside of the air chamber  85  to have an extremely higher pressure or lower pressure as compared to the atmospheric pressure. Accordingly, it is possible to suppress infiltration of the air inside the air chamber  85  into the adhesive  69 , which results from a higher pressure than the outside, and to suppress permeation of the air into the liquid flow channel  95 . 
     In this manner, since the ink inside the liquid flow channel  95  does not allow the air to be mixed from the air chamber  85 , it is possible to suppress poor ink ejection by suppressing mixed bubbles in the ink. As the flow channel member  90  according to the embodiment, it is possible to supply the ink to other members (in the embodiment, the head main body  10 ) without allowing the air to be mixed into the liquid flow channel  95  formed from a plurality of members from the air chamber  85  formed on the joining surface of the members. 
     In addition, in the head  1  according to the embodiment, the outward open channel  106  is disposed in the ink cartridge  100 . Accordingly, it is not necessary to dispose a very long flow channel corresponding to the outward open channel  106 , at the flow channel member  90  side, and thereby it is possible to decrease the flow channel member  90  in size. Since as the flow channel member  90  according to the embodiment, a flow channel (corresponding to the outward open channel  106 ) is not disposed for the gas discharged from other members (in the embodiment, the head main body  10 ), it is possible to decrease the size that much. 
     Furthermore, the flow channel member  90  is configured such that the liquid flow channel  95  partially has the vertical flow channel  51   a  and the horizontal flow channel  51   b . That is, it is possible to receive the ink from the supply portion  103  of the ink cartridge  100  using the vertical flow channel  51   a , to circulate the ink in any horizontal direction using the horizontal flow channel  51   b , and to supply the ink to the head main body  10  via the second flow channel  81 . Accordingly, regardless of a position (in the embodiment, a position of the attachment portion  58 ) connected by the supply portion  103  of the ink cartridge  100 , it is possible to attach the head main body  10  to the flow channel member  90  at any position. 
     In addition, since the horizontal flow channel  51   b  is disposed between the attachment member  50  and the flow channel plate  80 , it is possible to reduce the thickness of the flow channel member  90 . If a liquid flow channel is disposed at an integrated flow channel member, in order to circulate the ink in any horizontal direction from the attachment portion  58  to which the supply portion  103  of the ink cartridge  100  is connected, the liquid flow channel is required to be tilted with respect to the thickness direction of the flow channel member. However, in this case, the thickness of the flow channel member is increased as much as a tilted amount of the liquid flow channel. 
     On the other hand, since the liquid flow channel  95  has the horizontal flow channel  51   b , it is possible to decrease the length of the liquid flow channel  95  in the thickness direction, and thereby it is possible to decrease the size of the head  1  and the flow channel member  90  according to the embodiment in the thickness direction. 
     Embodiment 2 
     In Embodiment 1, the outward open channel  106  is formed in each ink cartridge  100  and each outward open channel  106  is allowed to communicate with the air chamber  85  formed around each liquid flow channel  95 . In Embodiment 2, a head  1 A will be described in which without forming the air chamber  85  for each liquid flow channel  95 , there is provided a flow channel member  90 A allowing the air chamber  85  to communicate with the outward open channel  106  disposed in one ink cartridge  100  by setting the air chamber  85  to be shared with a plurality of the liquid flow channels  95 . 
       FIG. 9  is an exploded perspective view of a head according to the present embodiment,  FIG. 10  is a top view illustrating a flow channel member according to the embodiment,  FIG. 11  is a bottom view illustrating the flow channel member according to the embodiment, and  FIG. 12  is a cross-section view of the head according to the embodiment. Further, the same reference numerals are given to the same elements as those in Embodiment 1, and the repeated description will be omitted. 
     As illustrated in  FIG. 9 , one ink cartridge  100  and three ink cartridges  100 A are attached to the attachment member  50 . The ink cartridge  100 A has the same configuration as the ink cartridge  100  except that the outward open channel  106  is not disposed. That is, the outward open channel  106  is disposed in one ink cartridge  100  only among four. 
     As illustrated in  FIG. 10 , the communication channel  96  is disposed at the attachment member  50 . The communication channel  96  is open inside the groove for releasing atmosphere  64  of the attachment portion  58  to which the ink cartridge  100  is attached. 
     On the other hand, with regard to three attachment portions  58  to which the ink cartridge  100 A is attached, the communication channel  96  is not open inside the groove for releasing atmosphere  64 . 
     As illustrated in  FIGS. 11 and 12 , four first grooves  68  formed from the first boss portion  66  and the second boss portion  67  are formed for each of the first flow channels  51  (the recess  51   c ) on the first joining surface  61  of the attachment member  50 . The adhesive  69  (the first joining section) is disposed at the first grooves  68 , similarly to Embodiment 1. That is, the adhesive  69  is formed so as to enclose the first flow channel  51  and the second flow channel  81 . 
     Then, one air chamber  85 A is formed by allowing the air chambers around the first joining section, which correspond to each color of the ink, to communicate with each other. On the other hand, a second groove  70 A is formed to enclose all of the first groove  68  and the air chamber  85 A on the first joining surface  61 . A seal member  71  (the second joining portion) is disposed at the second groove  70 A. That is, the seal member  71  is formed to enclose each adhesive  69 . 
     The flow channel plate  80  having the second joining surface  82  is joined to the first joining surface  61  where the adhesive  69  is disposed at the first groove  68  and the seal member  71  is disposed at the second groove  70 A. In this manner, one air chamber  85 A is formed outside the adhesive  69 , that is, inside the seal member  71 , between the attachment member  50  and the flow channel plate  80 . 
     In addition, on the first joining surface  61  of the attachment member  50 , the communication channel  96  is open outside the adhesive  69 , that is, inside the seal member  71 . Therefore, the air chamber  85 A communicates outward via the communication channel  96  and the outward open channel  106  of the ink cartridge  100 . 
     As described above, in a head  1 A according to the embodiment, one common air chamber  85 A is formed around each liquid flow channel  95 . Since even the air chamber  85 A of this aspect communicates outward similarly to Embodiment 1, the inner pressure thereof is adjustable. Therefore, it is possible to maintain a constant pressure by suppressing that temperature changes causes the inside of the air chamber  85 A to have an extremely higher pressure or lower pressure as compared to the atmospheric pressure. Accordingly, it is possible to suppress infiltration of the air inside the air chamber  85 A into the adhesive  69 , which results from a higher pressure than the outside, and to suppress permeation of the air into the liquid flow channel  95 . 
     In this manner, since the ink inside the liquid flow channel  95  does not allow the air to be mixed from the air chamber  85 A, it is possible to suppress poor ink ejection by suppressing mixed bubbles in the ink. As the flow channel member  90  according to the embodiment, it is possible to supply the ink to other members (in the embodiment, the head main body  10 ) without allowing the air to be mixed into the liquid flow channel  95  formed from a plurality of members from the air chamber  85 A formed on the joining surface of the members. 
     In addition, since the common air chamber  85 A is formed around each liquid flow channel  95 , it is possible to have a simpler structure compared to a case where the air chamber is formed for each liquid flow channel  95 , and thereby it is possible to reduce labors and costs required for processing and the like. 
     Embodiment 3 
     In Embodiment 1, the compliance space  45  of the head main body  10  is open outward via the connection channel  44  (refer to  FIG. 8 ). In Embodiment 3, a head  1 B will be described in which the compliance space  45  communicates with the air chamber  85 . 
       FIG. 13  is a cross-sectional view of the head according to the present embodiment. Further, the same reference numerals are given to the same elements as those of Embodiment 1, and the repeated description will be omitted. 
     The head  1 B includes the flow channel member  90 , a flow channel plate  120  and the head main body  10 . The flow channel plate  120  is a member joining the flow channel member  90  and the head main body  10 , by being arranged therebetween. 
     The wiring substrate  41  of the head main body  10  is joined to a surface of the head main body  10  side of the flow channel plate  120 . In addition, the conductive pad  40  disposed at the wiring substrate  41  and a recess  121  accommodating the wiring  36  connected to the conductive pad  40  is formed on the surface. 
     The flow channel plate  120  has a liquid flow channel  122 . The liquid flow channel  122  is a through hole which is open in both surfaces of the flow channel plate  120 , in which one opening communicates with the liquid flow channel  95  (the second flow channel  81 ) and the other opening communicates with the ink introduction channel  43  of the head main body  10 . That is, the ink is configured to be supplied from the liquid flow channel  95  to the manifold  22  (refer to  FIG. 8 ) via the liquid flow channel  122  and the ink introduction channel  43 . 
     In addition, a first atmosphere open channel  83  is disposed at the flow channel plate  80  and a second atmosphere open channel  123  is disposed at the flow channel plate  120 . The first atmosphere open channel  83  is a through hole which is open in both surfaces of the flow channel plate  80 , and the second atmosphere open channel  123  is a through hole which is open in both surfaces of the flow channel plate  120 . 
     One opening of the first atmosphere open channel  83  communicates with the air chamber  85 , and one opening of the second atmosphere open channel  123  communicates with the connection channel  44  of the head main body  10 . In this manner, a flow channel is formed from the first atmosphere open channel  83 , the second atmosphere open channel  123  and the connection channel  44 , in which the compliance space  45  communicates with the air chamber  85 . 
     The compliance space  45  (refer to  FIG. 8 ) communicates with the air chamber  85  via such a flow channel, and further is open to the atmosphere, sequentially passing through the communication channel  96 , the space  86  and the outward open channel  106 . 
     Since the compliance space  45  is open to the outer atmosphere, the compliance portion  29  can be deformed well corresponding to a pressure change in the manifold  22  similarly to Embodiment 1. 
     Here, there is a possibility that the moisture contained in the ink inside the manifold  22  (refer to  FIG. 7 ) may be evaporated to permeate the compliance portion  29  and discharged outward via the air chamber  85  to thicken the ink. 
     However, the outward open channel  106  is configured such that the pressure in the air chamber  85  is adjustable, and has the diffusion resistance to the air. Therefore, excessive evaporation of the moisture from the compliance portion  29  is suppressed. 
     In addition, a third atmosphere open channel  84  is disposed at the flow channel plate  80 , and a fourth atmosphere open channel  124  is disposed at the flow channel plate  120 . The third atmosphere open channel  84  is a through hole which is open in both surfaces of the flow channel plate  80  and the fourth atmosphere open channel  124  is a through hole which is open in both surfaces of the flow channel plate  120 . 
     One opening of the third atmosphere open channel  84  communicates with the air chamber  85  and one opening of the fourth atmosphere open channel  124  communicates with the recess  121  of the flow channel plate  120 . The recess  121  communicates with the accommodation section  19  of the head main body  10  via the opening  42  of the wiring substrate  41 . That is, the accommodation section  19  communicated with the air chamber  85  via the third atmosphere open channel  84 , the fourth atmosphere open channel  124  and the recess  121 . 
     In this manner, the accommodation section  19  is open to the atmosphere via the air chamber  85  and the outward open channel  106 . Accordingly, it is possible to obtain favorable deformation of the elastic film  25  using the piezoelectric elements  17 . Incidentally, if the accommodation section  19  is a sealed space, there is a possibility that the deformation of the elastic film  25  may be inhibited due to the pressure in the accommodation section  19 . 
     Here, the pressure generation chamber  11  is located below the accommodation section  19 , being separated from the elastic film  25  (refer to  FIG. 8 ). Depending on the pressure inside the accommodation section  19 , the moisture contained in the ink inside the pressure generation chamber  11  is evaporated to permeate the elastic film  25  and discharged outward via the air chamber  85  and the like. If the evaporation of the moisture continues, there is a possibility that the ink may be thickened. 
     However, the outward open channel  106  is configured such that the pressure in the air chamber  85  is adjustable, and has the diffusion resistance to the air. Therefore, excessive evaporation of the moisture from the elastic film  25  is suppressed, and thereby thickening of the ink is suppressed. 
     In the above-described head  1 B according to the embodiment, the compliance space  45  and the accommodation section  19  are configured to open to the atmosphere via the air chamber  85 . Accordingly, it is possible to obtain favorable deformation of the compliance portion  29  and the elastic film  25 . Then, since the outward open channel  106  functions as the pressure adjustment section, excessive evaporation of moisture from the compliance portion  29  and the elastic film  25  is suppressed, and thereby thickening of the ink is suppressed. 
     In addition, in the head  1 B, the air chamber  85 , the communication channel  96  and the outward open channel  106  are also used for dual purposes, as a flow channel for allowing the compliance space  45  to communicate outward. Therefore, it is possible to simplify the configuration which allows the compliance space  45  to be open to the atmosphere, and thereby it is possible to achieve cost reduction of the head  1 B. 
     Embodiment 4 
     In Embodiment 1, the first joining portion is set to the adhesive  69  and the second joining portion is set to the seal member  71  (refer to  FIG. 5 ). In Embodiment 4, a head  1 C will be described in which both the first joining portion and the second joining portion are set to the adhesive. 
       FIG. 14  is a cross-sectional view illustrating a main portion of a flow channel member according to the present embodiment. Further the same reference numerals are given to the same elements as those of Embodiment 1, and the repeated description will be omitted. 
     As illustrated in  FIG. 14 , the adhesive  69  is disposed between the first joining surface  61  and the second joining surface  82 , as the first joining portion enclosing the openings of the first flow channel  51  (the recess  51   c ) and the second flow channel  81 . Furthermore, an adhesive  72  is disposed inside the second groove  70 , as the second joining portion enclosing the adhesive  69 . 
     In a case where both the first joining portion and the second joining portion are configured using the adhesive in this manner, it is preferable to use an adhesive with high ink (liquid) resistance such as a silicone-based adhesive, as the adhesive  69  of the first joining portion, and to use an adhesive with low air or vapor permeability such as an epoxy-based adhesive, as the adhesive  72  of the second joining portion. 
     Using the adhesive with the high ink (liquid) resistance is because it is suitable for the first joining portion enclosing the liquid flow channel  95 . In addition, using the adhesive with low air or vapor permeability is because it is possible to ensure airtightness in the air chamber  85 . 
     Although not illustrated, both the first joining portion and the second joining portion may be configured to have the seal member  71 . In addition, the first joining portion may be configured to have the seal member  71  and the second joining portion may be configured to have the adhesive. 
     Embodiment 5 
     In Embodiment 1, the outward open channel  106  which is elongated and meandering is used for the pressure adjustment section (refer to  FIG. 6 ). In Embodiment 5, a head  1 D will be described which uses a filter as the adjustment section. 
       FIG. 15  is a cross-sectional view illustrating the head according to the present embodiment. Further, the same reference numerals are given to the same elements as those in Embodiment 1, and the repeated description will be omitted. 
     The ink cartridge  100  has a flow channel  108 . The flow channel  108  is open to the attachment member  50  side of the ink cartridge  100 , and the opening communicates with the space  86  formed in such a manner that the rib  101  and the elastic member  110  are in pressurizing contact with each other. In addition, a recess  107  having a wider opening than the flow channel  108  is formed on an upper surface (an opposite side upper surface to the attachment member  50 ) of the ink cartridge  100 , and the flow channel  108  is open inside the recess  107 . 
     As the pressure adjustment section according to the embodiment, a filter  106 D is disposed so as to close the opening of the recess  107 . Specifically, the filter  106 D is adhered to cover the recess  107 , and the filter  106 D is fixed to the ink cartridge  100  in such a manner that a joining substrate  109  is joined onto the filter  106 D. Further, the joining substrate  109  has an opening which is substantially the same shape as the opening of the recess  107 , and the opening and the recess  107  are separated from each other by the filter  106 D. 
     The filter  106 D has air permeability. Although the material is not particularly limited, it is possible to use porous materials such as cotton-like pulp, macromolecule absorbing polymer and urethane foam, or non-woven fabric, for example. 
     Since the filter  106 D has the air permeability in this manner, the air chamber  85  communicates outward via the communication channel  96 , the flow channel  108  and the filter  106 D. 
     In addition, the filter  106 D functions as the diffusion resistance to the air circulating outward from the flow channel  108 . Therefore, it is possible to optionally adjust the pressure in the air chamber  85  by appropriately designing a degree of the air permeability of the filter  106 D, for example, by appropriately selecting the material. 
     In this manner, in the head  1 D according to the embodiment, similarly to Embodiment 1, the air chamber  85  communicates outward via the communication channel  96 , the flow channel  108  and the filter  106 D and the inner pressure thereof is adjustable. Therefore, it is possible to maintain a constant pressure by suppressing that temperature changes causes the inside of the air chamber  85  to have an extremely higher pressure or lower pressure as compared to the atmospheric pressure. Accordingly, it is possible to suppress infiltration of the air inside the air chamber  85  into the adhesive  69 , which results from a higher pressure than the outside, and to suppress permeation of the air into the liquid flow channel  95 . 
     In this manner, since the ink inside the liquid flow channel  95  does not allow the air to be mixed from the air chamber  85 , it is possible to suppress poor ink ejection by suppressing mixed bubbles in the ink. As the flow channel member  90  according to the embodiment, it is possible to supply the ink to other members (in the embodiment, the head main body  10 ) without allowing the air to be mixed into the liquid flow channel  95  formed from a plurality of members from the air chamber  85  formed on the joining surface of the members. 
     Another Embodiment 
     Hitherto, exemplary embodiments of the invention have been described, but a basic configuration of the invention is not limited to those described above. For example, the configurations in Embodiments 1 to 5 described above may be combined, and may be combined with the following modification example. 
     In the flow channel member  90  according to Embodiments 1 to 5, the air chamber  85  communicates outward via the communication channel  96  and the outward open channel  106  (the filter  106 D) as the pressure adjustment section disposed in the ink cartridge  100 , but the invention is not limited to such an aspect. That is, the communication channel  96  may not communicate with the outward open channel  106  of the ink cartridge  100  or the filter  106 D, but may be open to any position. For example, the communication channel  96  may be open to a surface of the attachment member  50  such as the cartridge mounting section  52 . Even in this case, it is possible to suppress infiltration of the air inside the air chamber  85  into the liquid flow channel  95 . 
     Furthermore, the communication channel  96  is formed at the attachment member  50  side configuring the flow channel member  90 , but may be formed at the liquid channel plate  80  side. 
     In addition, the liquid flow channel  95  has the horizontal flow channel  51   b , but is not necessarily limited to this aspect. That is, the first flow channel (corresponding to the vertical flow channel  51   a ) penetrating the attachment member  50  in the thickness direction and the second flow channel  81  of the flow channel plate  80  are directly connected to form the liquid flow channel  95 . Even in this case, the air chamber  85  is defined by the adhesive (the first joining section) disposed so as to enclose the openings of the first flow channel and the second flow channel, the seal member  71  (the second joining section, but it may be the adhesive) outside the adhesive, the first joining surface  61  and the second joining surface  82 . Since the air chamber  85  is allowed to communicate outward using the communication channel  96 , the same operation effect as that of Embodiment 1 can be achieved. 
     The pressure generation unit that generates pressure changes in the ink of the pressure generation chamber  11  is not limited to the one described in Embodiment 1. For example, it is possible to use the one in which heating elements are arranged in the liquid flow channel and the ink droplets are ejected from the nozzle using bubbles generated by heat of the heating elements, or a so-called electrostatic actuator which ejects the ink droplets from the nozzle by generating an electrostatic force between the vibrating plate and the electrode and deforming the vibrating plate using the electrostatic force. 
     In addition, the head  1  of one embodiment described above configures a part of the ink jet type recording head unit including the ink flow channel communicating with the ink cartridge and the like, and is mounted on the ink jet type recording apparatus.  FIG. 16  is a schematic diagram illustrating an example of the ink jet type recording apparatus. 
     In the ink jet type recording apparatus I illustrated in  FIG. 16 , the head  1  is disposed such that the ink cartridge  100  configuring an ink supply unit is attachable and detachable, and a carriage  3  on which the head  1  is mounted is disposed to be axially movable to a carriage shaft  5  attached to an apparatus main body  4 . The head  1  ejects black ink composition and color ink composition, for example. 
     Then, since a drive force of a drive motor  6  is transmitted to the carriage  3  via a plurality of gears (not illustrated) and a timing belt  7 , the carriage  3  on which the head  1  is mounted is caused to move along the carriage shaft  5 . On the other hand, a platen  8  is disposed in the apparatus main body  4  along the carriage shaft  5 , and a recording sheet S which is a recording medium such as a sheet of paper fed by a feed roller (not illustrated) is transported by being wound around the platen  8 . 
     Furthermore, in the above-described example, the head  1  including the flow channel member  90  has been described, but the invention is also applicable to the ink jet type recording apparatus where the flow channel member  90  is disposed at a part except for the head  1 . Specifically, in a case of the ink jet type recording apparatus where an ink tank which is a liquid storage unit storing the ink is not mounted on the carriage  3 , but is fixed to the apparatus main body  4  such that the ink tank and a head main body  10  are connected to each other using a tubular supply pipe, the above-described flow channel member  90  may be disposed in a place where the ink tank is installed, for example. 
     In addition, in the above-described ink jet type recording apparatus I, the one in which the head  1  is mounted on the carriage  3  so as to move in a main scanning direction is exemplified, but is not particularly limited thereto. For example, the invention is also applicable to a so-called line type recording apparatus which performs printing only by moving the recording sheet S such as a sheet of paper in a sub-scanning direction, with the head  1  being fixed. 
     Furthermore, the invention is broadly intended for overall manufacturing methods of the liquid ejecting head, and for example is also applicable to manufacturing methods of a recording head such as various ink jet type recording heads used in an image recording apparatus of a printer, a color material ejecting head used in manufacturing color filter of a liquid crystal display, an electrode material ejecting head used in forming an electrode of an organic EL display or a field emission display (FED) and a bio-organic compound ejecting head used in manufacturing a bio-chip. 
     In addition, the invention is not limited to the flow channel member to be mounted on the liquid ejecting head and the liquid ejecting apparatus, but is also applicable to the flow channel to be mounted on other devices. 
     REFERENCE SIGNS LIST 
     I: ink jet type recording apparatus (liquid ejecting apparatus) 
       1 : head (liquid ejecting head) 
       10 : head main body 
       29 : compliance portion 
       45 : compliance space 
       50 : attachment member 
       51 : first flow channel 
       51   a : vertical flow channel 
       51   b : horizontal flow channel 
       61 : first joining surface 
       69 : adhesive (first joining section) 
       71 : seal member (second joining section) 
       80 : flow channel plate (second member) 
       81 : second flow channel 
       82 : second joining surface 
       85 : space 
       90 : flow channel member 
       95 : liquid flow channel 
       96 : communication channel 
       100 : ink cartridge 
       106 : outward open channel (pressure adjustment section)