Patent Publication Number: US-10328700-B2

Title: Liquid ejecting head, liquid ejecting apparatus, and production method for liquid ejecting head

Description:
BACKGROUND 
     1. Technical Field 
     The present invention relates to a liquid ejecting head that includes three members adhered by adhesive, a liquid ejecting apparatus, and a production method for the liquid ejecting head. 
     2. Related Art 
     A liquid ejecting apparatus includes a liquid ejecting head and is capable of ejecting various kinds of liquids from the ejecting head. Examples of the liquid ejecting apparatus include image recording apparatuses, such as ink jet type printers and ink jet type plotters. The liquid ejecting apparatus is capable of accurately landing very small amounts of liquid at predetermined locations and, because of this advantage, is recently applied to various production apparatuses as well. For example, the liquid ejecting apparatus is applied to display production apparatuses that produce color filters of liquid crystal displays and the like, electrode forming apparatuses that form electrodes of organic electroluminescence (EL) displays, field emission displays (FEDs), etc., and chip production apparatuses that produce biochips (biochemical devices). While a recording head for an image recording apparatus ejects liquid-state inks, a color material ejecting head for a display production apparatus ejects solutions of color materials of red (R), green (G), blue (B), etc. Furthermore, an electrode material ejecting head for an electrode forming apparatus ejects an electrode material in a liquid state, and a bioorganic material ejecting head for a chip production apparatus ejects a solution of a bioorganic material. 
     A liquid ejecting head as described above includes a first retainer member that holds a head body provided with nozzles, a second retainer member adhered to the first retainer member, and a circuit substrate disposed in a space between the first retainer member and the second retainer member (see, for example, JP-A-2011-207181). The aforementioned space has an opening in a side surface of the first retainer member and the second retainer member and is tightly sealed by a protective member closing the opening. That is, the foregoing space is tightly sealed by the first retainer member, the second retainer member, and the protective member. 
     In the foregoing related-art configuration, there is possibility that variations of adhesives may result in impeded adhesion of a protective member or insufficient sealing of the internal space. Concretely, for example, as illustrated in  FIG. 16 , in a configuration formed by adhering a first retainer member  91  and a second retainer member  92  by a first adhesive  93  and then bringing a protective member  94  near (as indicated by an arrow in  FIG. 16 ) to the first retainer member  91  and the second retainer member  92  adhered to each other and adhering the protective member  94  thereto by a second adhesive  95 , if the amount of the first adhesive  93  happens to be large due to discrepancy, there is possibility that the first adhesive  93  may squeeze out from the space between the first retainer member  91  and the second retainer member  92  and harden on the outer sides thereof. The protrusion of the first adhesive  93  may possibly inhibit the protective member  94  from being adhered to the first retainer member  91  and the second retainer member  92 . In order to avoid this problem, it is conceivable to reduce the set amount of the first adhesive  93  applied so that the first adhesive  93  will not squeeze out despite such variations in the amount applied. However, this measure may possibly result in an excessively small amount of the first adhesive  93  applied due to variations such that, as illustrated in  FIG. 17 , the first adhesive  93  does not sufficiently fill the space between the first retainer member  91  and the second retainer member  92  but allows a gap (void)  96  to form between the first retainer member  91  and the second retainer member  92 . If such a gap  96  form, the internal space defined by the first retainer member  91 , the second retainer member  92 , and the protective member  94  communicates with an external space via the gap  96 . This may possibly allow undesired matter, such as ink or dust, to enter the internal space and stain and spoil a member disposed within the space, for example, a circuit substrate or the like. 
     SUMMARY 
     An advantage of some aspects of the invention is provision of a liquid ejecting head, a liquid ejecting apparatus, and a production method for the liquid ejecting head in which formation of a gap between members is inhibited. 
     A first aspect of the invention provides a liquid ejecting head that includes a head body provided with nozzles that eject a liquid, a first member that has a first surface and a second surface which intersects the first surface and that holds the head body at a location apart from the first surface and the second surface, a second member that has a third surface and that is adhered to the first surface of the first member by a first adhesive so that the third surface is along a planar direction of the second surface of the first member, a third member that is disposed so as to extend over the second surface and the third surface and that is adhered to the second surface and the third surface by a second adhesive, a space surrounded by the first member, the second member, the third member, the first adhesive, and the second adhesive, and an adhesive receiving portion that communicates with an intersection portion at which the first adhesive and the second adhesive contact and that accepts inflow of at least one of the first adhesive and the second adhesive. 
     According to this aspect of the invention, even when the amount of the first adhesive happens to be large at the time of adhering the first member and the second member, the first adhesive flows into the adhesive receiving portion, so that the first adhesive can be inhibited from squeezing out to the outsides of the first member and the second member. Therefore, the amount of the first adhesive can be increased so that the first adhesive more easily fills the joining portion between the first member and the second member. As a result, it is possible to inhibit formation of a gap between the first member and the second member. 
     In the foregoing liquid ejecting head according to the first aspect of the invention, the adhesive receiving portion may be at least partially defined by a chamfer that is formed on one of the first member and the second member and that extends from a first surface side toward a third member side. 
     According to this embodiment, the adhesive receiving portion can be easily formed. 
     In the foregoing liquid ejecting head, the adhesive receiving portion may be at least partially defined by a chamfer that is formed on the first member and that extends from a first surface side toward a third member side and a chamfer that is formed on the second member and that extends from the first surface side toward the third member side. 
     According to this embodiment, the adhesive receiving portion can be easily formed. Furthermore, because an increased amount of adhesive can be received by the adhesive receiving portion, it is possible to inhibit the first adhesive from squeezing out to the outsides of the first member and the second member even in the case where the amount of the first adhesive varies to a great extent. Therefore, the amount of the first adhesive can be further increased so that the first adhesive even more easily fills the joining portion between the first member and the second member. As a result, it is possible to further inhibit formation of a gap between the first member and the second member. 
     In the foregoing liquid ejecting head, the chamfer may have a curved surface. 
     According to this embodiment, the first adhesive or the second adhesive easily flows along the curved surface into the adhesive receiving portion. As a result, the adhesive receiving portion is more easily filled with either one or both of the first adhesive and the second adhesive, so that formation of a gap between the first member and the second member can be further inhibited. 
     Furthermore, in the foregoing liquid ejecting head, a dimension of the chamfer measured between a first surface-side end and a third member-side end on a space side of the chamfer may be different from a dimension of the chamfer measured between a first surface-side end and a third member-side end on an opposite side of the chamfer to the space. 
     This embodiment facilitates control of the squeezing-out of either one or both of the first adhesive and the second adhesive. That is, by making a size of the chamfer smaller (i.e., a dimension of the chamber measured between the first surface-side end and the third member-side end) on one of the space side of the chamfer and the opposite side of the chamfer to space on which it is desired to inhibit the squeezing-out of the adhesive, the squeezing-out of the adhesive to that side can be inhibited. As a result, for example, a defective condition in which the adhesive deposits on other component parts or the like can be inhibited and the reliability of the liquid ejecting head can be increased. 
     Furthermore, in the foregoing ejecting head, a first surface-side opening width of the adhesive receiving portion may be larger than a third member-side opening width of the adhesive receiving portion. 
     According to this embodiment, even in the case where the amount of the first adhesive used to adhere the first member and the second member tends to vary greatly, it can be made more certain that the first adhesive will reach the adhesive receiving portion. As a result, formation of a gap between the first member and the second member can be further inhibited. 
     Furthermore, in the foregoing liquid ejecting head, the second adhesive in a liquid state prior to hardening may have lower viscosity than the first adhesive in a liquid state prior to hardening. 
     According to this embodiment, at the time of adhering the third member, it is easier for the second adhesive to fill a portion between the first member and the second member which is not filled with the first adhesive. As a result, formation of a gap between the first member and the second member can be more certainly inhibited. 
     A second aspect of the invention provides a liquid ejecting apparatus that includes any one of the above-described liquid ejecting heads. 
     According to this aspect of the invention, the reliability of the liquid ejecting apparatus can be increased. 
     A third aspect of the invention provides a production method for a liquid ejecting head that includes a head body provided with nozzles that eject a liquid, a first member that has a first surface and a second surface which intersects the first surface and that holds the head body at a location apart from the first surface and the second surface, a second member that has a third surface and that is adhered to the first surface of the first member by a first adhesive so that the third surface is along a planar direction of the second surface of the first member, a third member that is disposed so as to extend over the second surface and the third surface and that is adhered to the second surface and the third surface by a second adhesive, a space surrounded by the first member, the second member, the third member, the first adhesive, and the second adhesive, and an adhesive receiving portion that communicates with an intersection portion at which the first adhesive and the second adhesive contact and that accepts inflow of at least one of the first adhesive and the second adhesive. The production method includes a first adhering step of adhering the first member and the second member by the first adhesive, and a second adhering step of adhering the first member and the second member to the third member by the second adhesive after the first adhering step. 
     According to this aspect of the invention, a liquid ejecting head in which formation of a gap between the first member and the second member is inhibited can be created. 
    
    
     
       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 perspective view illustrating an internal configuration of a printer. 
         FIG. 2  is an exploded perspective view of a recording head. 
         FIG. 3  is a sectional view of the recording head. 
         FIG. 4  is a sectional view of a head body. 
         FIG. 5  is an enlarged perspective view of portions of the recording head. 
         FIG. 6  is an enlarged view of a region VI indicated in  FIG. 3 . 
         FIG. 7  is a sectional view describing a production method for a recording head. 
         FIG. 8  is a sectional view illustrating the production method for the recording head. 
         FIG. 9  is a sectional view illustrating the production method for the recording head. 
         FIG. 10  is an enlarged sectional view of portions of a recording head according to a second exemplary embodiment of the invention. 
         FIG. 11  is an enlarged sectional view of portions of a recording head according to a third exemplary embodiment. 
         FIG. 12  is an enlarged sectional view of portions of a recording head according to a fourth exemplary embodiment. 
         FIG. 13  is an enlarged sectional view of portions of a recording head according to a fifth exemplary embodiment. 
         FIG. 14  is an enlarged perspective view of portions of a head fixing member according to a sixth exemplary embodiment. 
         FIG. 15  is an enlarged perspective view of portions of a head fixing member according to a seventh exemplary embodiment. 
         FIG. 16  is an enlarged sectional view of portions of a related-art recording head, illustrating a configuration thereof. 
         FIG. 17  is an enlarged sectional view illustrating a configuration of the portions of the related-art recording head. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Exemplary embodiments of the invention will be described hereinafter with reference to the accompanying drawings. Although in the following exemplary embodiments, various limitations are described as preferred concrete examples of the invention, such examples of limitations do not actually limit the scope of the invention unless particular limitation of the invention is stated in the following description. The following description will be made in conjunction with an ink jet type printer (hereinafter, referred to simply as printer)  1  that is a kind of a liquid ejecting apparatus and an ink jet type recording head (hereinafter, referred to simply as recording head)  3  that is a kind of a liquid ejecting head mounted in the printer  1 , which are mere examples. 
       FIG. 1  is a perspective view illustrating an internal configuration of the printer  1 . The printer  1  is an apparatus that records an image or the like on a surface of a recording medium  2  (a kind of landing target), such as a recording sheet of paper, by ejecting an ink (a kind of liquid) to the surface of the recording medium  2 . As illustrated in  FIG. 1 , the printer  1  includes a recording head  3 , a carriage  4  to which the recording head  3  is attached, a carriage moving mechanism  5  that moves the carriage  4  in main scanning directions, a transporting mechanism  6  that moves the recording medium  2  in a subsidiary scanning direction, etc. The aforementioned ink is stored in an ink cartridge  7  that is provided as a liquid supply source. The ink cartridge  7  is detachably attached to the recording head  3 . Note that a configuration in which an ink cartridge is disposed on a main body side of the printer and the ink is supplied from the ink cartridge to the recording head via an ink supply tube can also be adopted. 
     The carriage moving mechanism  5  includes a timing belt  8 . The timing belt  8  is driven by an electric pulse motor  9  such as a direct-current (DC) motor. Therefore, when the electric pulse motor  9  is actuated, the carriage  4  is moved back and forth in the main scanning directions (along a width direction of the recording medium  2 ) while being guided by a guide rod  10  that extends in the printer  1 . The location of the carriage  4  in the main scanning directions is detected by a linear encoder (not depicted) that is a kind of a location information detection unit. The linear encoder sends a detection signal, that is, an encoder pulse (a kind of location information), to a control section of the printer  1 . 
     Next, the recording head  3  will be described.  FIG. 2  is an exploded perspective view of the recording head  3 .  FIG. 3  is a sectional schematic diagram of an end portion of the recording head  3 .  FIG. 4  is a schematic sectional diagram of a head body  12 . In the following description, a direction in which various members are stacked will be referred to as an up-down direction. 
     The recording head  3  according to this exemplary embodiment, as illustrated in  FIG. 2  and  FIG. 3 , includes the head body  12  that ejects an ink, a head fixing member  13  (corresponding to a first member in the invention) to which at least one head body  12  (five head bodies  12  in this exemplary embodiment) is fixed, a base member  14  (corresponding to a second member in the invention) provided on an upper side of the head fixing member  13  (on the opposite side thereof to the head bodies  12 ), a protective member  15  (corresponding to a third member in the invention) that is attached to side surfaces of the head fixing member  13  and the base member  14 , a needle holder  17  to which supply needles  16  are attached, etc. 
     Each supply needle  16  is a hollow needle-shaped member inserted into the ink cartridge  7 . A distal end portion of each supply needle  16  has an introduction hole (not depicted). Ink in the ink cartridge  7  is introduced to the recording head  3  through the introduction hole. In this exemplary embodiment, ten supply needles  16  are attached to an upper surface of the needle holder  17 . The needle holder  17  has therein flow paths (not depicted) that communicate with the supply needles  16 . The needle holder  17  is fixed to the base member  14  disposed that is disposed on a lower surface side of the needle holder  17  (on the opposite side thereof to the supply needles  16 ) via a sealing member  18 . That is, the sealing member  18  is sandwiched between the needle holder  17  and the base member  14 . The sealing member  18  is made up of an elastic body of, for example, an elastomer or a rubber, and provides a liquid-tight communication between flow paths within the needle holders  17  and corresponding flow paths (not depicted) provided within the base member  14 . 
     The head fixing member  13 , as illustrated in  FIGS. 2 and 3 , is disposed so that the base member  14  is attached to an upper surface side of the head fixing member  13  and the head bodies  12  are held on a lower surface side of the head fixing member  13  (i.e., a portion thereof apart from the portion thereof to which the base member  14  is joined and also apart from a portion thereof to which the protective member  15  is joined). In this exemplary embodiment, the head fixing member  13  has on its upper surface a first accommodating recess portion  48  that sinks downward halfway in the thickness of the head fixing member  13 . A first circuit substrate  49  is housed in the first accommodating recess portion  48 . In other words, the first accommodating recess portion  48  is surrounded by a first partition wall  50  extending upward from a bottom surface of the first accommodating recess portion  48 . In this exemplary embodiment, the first partition wall  50  is provided on three of four sides around the first accommodating recess portion  48 , that is, three sides other than a side to which the protective member  15  is attached. That is, the first accommodating recess portion  48  has an opening in a side surface on the side to which the protective member  15  is attached. Furthermore, the first accommodating recess portion  48  has an upper surface-side opening closed and sealed by the base member  14  and a protective member  15 -side opening covered by the protective member  15 . The first accommodating recess portion  48  communicates with a second accommodating recess portion  55  (described later) of the protective member  15  and forms together therewith a accommodating space  51  (corresponding to a space in the invention). The first circuit substrate  49  is sealed in the accommodating space  51 . With regard to joining portions of the base member  14 , the head fixing member  13 , and the protective member  15 , a detailed description will be given later. 
     An interior of the head fixing member  13  is provided with substrate insertion holes  52  that individually correspond to the head bodies  12  and that penetrate the head fixing member  13  in its thickness direction. An upper end of each substrate insertion hole  52  has an opening in a bottom surface of the first accommodating recess portion  48 . In this exemplary embodiment, five substrate insertion holes  52  are provided corresponding to the five head bodies  12 . Flexible substrates  35  (described later) extending out of the head bodies  12  are inserted through the substrate insertion holes  52  and connected to the first circuit substrate  49  that is disposed in the first accommodating recess portion  48 . Furthermore, an interior of the head fixing member  13  is provided with a plurality of ink flow paths  53 . An upper end portion of each ink flow path  53  stands upward from the bottom surface of the first accommodating recess portion  48  and is connected to corresponding flow paths that are provided within the base member  14 . The first circuit substrate  49  is provided with through holes (not depicted) corresponding to the ink flow paths  53  that stand upward in the first accommodating recess portion  48 . Therefore, the upper end portions of the ink flow paths  53  are able to communicate with the corresponding flow paths provided within the base member  14 , without being impeded by the first circuit substrate  49 . Lower end portions of the ink flow paths  53  are connected to liquid introducing paths  21  of the head bodies  12  (described later). 
     The protective member  15  is disposed along a side of the head fixing member  13  and the base member  14  (along the right side of the two members in  FIGS. 2 and 3 ) and attached to side surfaces of the head fixing member  13  and the base member  14  on that side. This protective member  15  is provided with the second accommodating recess portion  55  of which a base member  14  side (or a head fixing member  13  side) and an upper side (i.e., the side remote from the head bodies  12 ) are open. That is, the second accommodating recess portion  55  is surrounded by a second partition wall  57  that stands on edges of three sides of four sides of a face of the second accommodating recess portion  55  which faces the side surface of the head fixing member  13  and the side surface of the base member  14 . The second accommodating recess portion  55  has a base member  14 -side opening closed and sealed by the head fixing member  13  and the base member  14 . A lower end portion of the base member  14 -side opening communicates with the first accommodating recess portion  48  and forms together therewith the accommodating space  51 . In short, the accommodating space  51  is surrounded by the head fixing member  13 , the base member  14 , the protective member  15 , and adhesive adhering these members (concretely, a first adhesive  59  and a second adhesive  60  described later). 
     In this exemplary embodiment, the second accommodating recess portion  55  houses therein a second circuit substrate  56 . In other words, the second circuit substrate  56  is disposed between the protective member  15  and the base member  14 . Specifically, the second circuit substrate  56  is disposed on the side surface of the base member  14 , and the protective member  15  is attached so as to cover the second circuit substrate  56 . Thus, the second circuit substrate  56  can be protected by the protective member  15 . The second circuit substrate  56  is connected at its lower end portion (concretely, at a communicating portion between the first accommodating recess portion  48  and the second accommodating recess portion  55 ) to the first circuit substrate  49 . Note that the first circuit substrate  49  and the second circuit substrate  56  can be directly connected, for example, by coupling connectors provided on the two substrates, or indirectly connected via a wiring member or the like. A connector  58  is provided on an upper end portion of the second circuit substrate  56 . The connector  58  is exposed to the upper side opening of the second accommodating recess portion  55  and is therefore connectable to external wiring. That is, the accommodating space  51  has an opening that is formed at a side of the base member  14  and above the recording head  3  so as to expose the connector  58 . Thus, although the accommodating space  51  has an opening above the recording head  3 , ink is unlikely to enter an interior of the accommodating space  51  because the side to which ink is ejected (discharged) is downward from the recording head  3 . Note that, of the opening portion of the accommodating space  51 , a portion around the connector  58  may be closed by a resin or the like. That is, the accommodating space  51  may be tightly sealed. In this manner, entrance of ink into the accommodating space  51  can be more certainly inhibited. 
     Next, the head bodies  12  will be described. In this exemplary embodiment, each of the head bodies  12 , as illustrated in  FIG. 4 , has a configuration in which a nozzle plate  23 , a flow path substrate  29 , piezoelectric elements  32  (a kind of actuator), a closure plate  33 , a compliance substrate  37 , etc. are stacked, and is mounted in a head case  19 . 
     In this exemplary embodiment, the head case  19  is a box-shaped member made of a synthetic resin. As illustrated in  FIG. 4 , a central portion of the head case  19  is provided with an insertion space  20  that is elongated along a nozzle row direction. The insertion space  20  is a space into which the flexible substrate  35  is inserted and which penetrates the head case  19  in its plate thickness direction. The insertion space  20  communicates with a connecting space  36  of the closure plate  33  that is joined below the head case  19 . Inside the head case  19  there are provided liquid introducing paths  21  through which ink flows. Lower ends of the liquid introducing paths  21  connect to common liquid chambers  26  described below. In this exemplary embodiment, the liquid introducing paths  21  are formed at both sides of the insertion space  20  in a direction orthogonal to the nozzle row direction. In a lower surface of the head case  19 , portions that face the common liquid chambers  26  are each provided with a compliance space  22  that is formed so as not to inhibit flexible deformation of a closure film  39  that demarcates an upper surface of the adjacent common liquid chamber  26 . 
     The flow path substrate  29  on which the piezoelectric elements  32  lie is a substrate made of silicon (e.g., a silicon single crystal substrate) that is elongated along the nozzle row direction. As illustrated in  FIG. 4 , the flow path substrate  29  is provided with two communicating portions  27  elongated in a longitudinal direction of the flow path substrate  29 . Each communicating portion  27  communicates with a corresponding one of through hole portions  42  of the closure plate  33  and forms together therewith a common liquid chamber  26 . In a portion of the flow path substrate  29  sandwiched between the two communicating portions  27  there are plurality of pressure chambers  30  that are provided side by side along the nozzle row direction. The pressure chambers  30  are arranged in two rows corresponding to the two communicating portions  27 . Each pressure chamber  30  communicates with the adjacent communicating portion  27  via a corresponding one of supply paths  28  that have a narrower width than the pressure chambers  30 . The two rows of the pressure chambers  30  are shifted from each other in position in the nozzle row direction by half an arrangement pitch corresponding to an arrangement of nozzles  24 . 
     The nozzle plate  23  is fixed to a lower surface of the flow path substrate  29  (an opposite side surface thereof to the piezoelectric elements  32 ) via an adhesive or the like. The nozzle plate  23  is made of a silicon substrate (e.g., a silicon single crystal substrate) and provided with a plurality of nozzles  24  that are formed in the nozzle plate  23  so as to communicate one-to-one with the pressure chambers  30 . Specifically, in the nozzle plate  23 , the nozzles  24  (hereinafter, sometimes referred to as rows of nozzles) are provided (formed) side by side linearly (in other words, in rows) in the longitudinal direction of the nozzle plate  23 . The nozzles  24  (rows of nozzles) formed side by side are aligned equidistantly with a pitch that corresponds to a dot formation density, from a nozzle  24  at an end to a nozzle  24  at the opposite end in the longitudinal direction. In this exemplary embodiment, two nozzle rows are formed corresponding to the two rows of the pressure chambers  30 . The two nozzle rows are shifted in position from each other by half the pitch in an arrangement direction of the nozzles  24  (i.e., a nozzle row direction). More specifically, the nozzles  24  of one of the two rows and the nozzles  24  of the other row are shifted in position in the nozzle row direction so as to alternate with each other. 
     A vibrations plate  31  lies on an upper surface of the flow path substrate  29  (the opposite surface thereof to the nozzle plate  23 ). The vibration plate  31  is made up of, for example, an elastic film formed from silicon dioxide (SiO 2 ) on the upper surface of the flow path substrate  29  (i.e., the opposite surface thereof to the closure plate  33 ) and an insulator film formed from zirconium dioxide (ZrO 2 ) on the elastic film. This vibration plate  31  closes and seals upper openings of spaces that are to form the pressure chambers  30 . In other words, the vibration plate  31  demarcates an upper surface of the pressure chamber  30 . Portions of the vibration plate  31  that correspond to the pressure chambers  30  (more specifically, the upper openings of the pressure chambers  30 ) function as displacement portions that are displaced in a direction away from or toward a nozzle  24  as a corresponding one of the piezoelectric elements  32  flexurally deforms. Specifically, portions of the vibration plate  31  that correspond to the upper openings of the pressure chambers  30  serve as drive regions that are permitted to flexurally deform. 
     Deformation (displacement) of the drive region (displacement portion) changes the volume of the pressure chamber  30  and therefore causes pressure changes in the ink in the pressure chamber  30 . By utilizing such pressure changes, ink inside the pressure chamber  30  can be ejected through the nozzle  24 . Of the vibration plate  31 , portions that correspond to the communicating portions  27  have been removed to form openings. 
     In the upper surface of the vibration plate  31  (more specifically, the opposite surface of the vibration plate  31 , more concretely, the insulation film, to the flow path substrate  29 ), regions that correspond to the pressure chambers  30  are provided with the piezoelectric elements  32  laid thereon. In this exemplary embodiment, the piezoelectric elements  32  are so-called flexure mode piezoelectric elements. The piezoelectric elements  32  are aligned side by side in the nozzle row direction, corresponding individually to the nozzles  24 . Each of the piezoelectric elements  32  is formed by, for example, a lower electrode layer that forms an individual electrode, a piezoelectric body layer, and an upper electrode layer that forms a common electrode are sequentially stacked in that order from the surface of the vibration plate  31 . Note that, depending on conditions of a drive circuit or wiring, the lower electrode layer may be formed as a common electrode and the upper electrode layer may be formed as an individual electrode. As for each piezoelectric element  32  configured as described above, when an electric field according to a potential difference between the lower electrode layer and the upper electrode layer is applied between the two electrodes, the piezoelectric element  32  flexurally deforms in a direction away from the nozzle  24  or a direction toward the nozzle  24 . Lead wires (not depicted) extend out from the piezoelectric elements  32  toward a region on the vibration plate  31  between the two rows of pressure chambers  30  (i.e., between the two rows of piezoelectric elements  32 ). An opposite end portion of each lead wire to the piezoelectric element  32  is connected to the flexible substrate  35 . 
     The closure plate  33  is joined to the upper surface of the vibration plate  31  and has, in regions adjacent to the piezoelectric elements  32 , piezoelectric element accommodating spaces  34  whose size is such as not to inhibit the displacement of the piezoelectric elements  32 . Corresponding to the two rows of the piezoelectric elements  32 , two piezoelectric element accommodating spaces  34  are formed. Between the two piezoelectric element accommodating spaces  34 , a connecting space  36  is formed by removing a corresponding portion of the closure plate  33  that extends across the plate thickness of the closure plate  33 . The connecting space  36  communicates with the insertion space  20  of the head case  19 . Inside the connecting space  36  there is disposed an end portion of the flexible substrate  35  inserted through the insertion space  20 . The closure plate  33  has, at locations corresponding to the elongated communicating portions  27  of the flow path substrate  29 , through hole portions  42  that penetrate the thickness of the closure plate  33  and that are elongated along the nozzle row direction. In this exemplary embodiment, two through hole portions  42  are provided corresponding to the two communicating portions  27 . Each through hole portion  42  communicates with a corresponding one of the communicating portions  27  and forms together therewith a common liquid chamber  26 . That is, the through hole portions  42  define spaces that form upper portions of the common liquid chambers  26 . 
     The compliance substrate  37  seals upper surfaces of the through hole portions  42  and partitions the common liquid chambers  26 . The compliance substrate  37  is made up of a stack of a closure film  39  having flexibility and a fixture substrate  38  made of a hard material such as a metal. In this exemplary embodiment, the compliance substrate  37  is joined to the upper surface of the closure plate  33 , in a posture with the closure film  39  disposed at a lower side (i.e., at the closure plate  33  side). The compliance substrate  37  has, at locations corresponding to the insertion space  20 , an opening that penetrates the thickness of the compliance substrate  37  so as to provide communication between the insertion space  20  and the connecting space  36 . Furthermore, at locations on the compliance substrate  37  which correspond to the liquid introducing paths  21 , openings penetrate the thickness of the compliance substrate  37  so as to provide communication between the liquid introducing paths  21  and the common liquid chambers  26 . Of the portions of the compliance substrate  37  that face the common liquid chambers  26 , portions other than the openings that provide communication between the liquid introducing path  21  and the common liquid chamber  26  are formed as closure portions  43  that are made up of only the closure film  39  by removing the fixture substrate  38 . Each closure portion  43  functions as a compliance portion that absorbs pressure changes in the ink within an adjacent one of the common liquid chambers  26 . 
     As illustrated in  FIGS. 2 to 4 , a fixture plate  45  is attached to lower surfaces of the head bodies  12  (i.e., lower surfaces of the nozzle plates  23 ). In this exemplary embodiment, the fixture plate  45  is produced from a plate member that has electroconductivity, such as a stainless steel plate, and is bent upward (to the head fixing member  13  side) at locations apart from the nozzle plates  23 . A portion of the fixture plate  45  that is parallel to the nozzle plates  23  is provided with a plurality of nozzle exposing openings  46  corresponding to the head bodies  12 . The fixture plate  45  is in contact with peripheral edge portions of the nozzle plate  23 , with the nozzle exposing openings  46  exposing the nozzles  24 . Due to this arrangement, the fixture plate  45  and the nozzle plates  23  are electrically connected. 
     Next, joining portions between the base member  14 , the head fixing member  13 , and the protective member  15  will be described.  FIG. 5  is an enlarged perspective view of portions of the recording head  3 .  FIG. 6  is an enlarged view of a region VI illustrated in  FIG. 3 . That is,  FIG. 6  is an enlarged sectional view of portions of the recording head  3 . In  FIG. 5 , the protective member  15  is indicated by interrupted lines. 
     As illustrated in  FIG. 5  and  FIG. 6 , the base member  14  and the head fixing member  13  are adhered to each other by a first adhesive  59 . Concretely, the first adhesive  59  adheres a flat upper surface of the head fixing member  13 , that is, an upper surface of the first partition wall  50  (hereinafter, referred to as first surface  61 ), and a flat lower surface of the base member  14 . In short, the base member  14  is adhered to the first surface  61  of the head fixing member  13  by the first adhesive  59 . In this exemplary embodiment, the first adhesive  59  is provided in an outer perimeter region around the first accommodating recess portion  48 . That is, the base member  14  and the head fixing member  13  are adhered by the first adhesive  59 , on three sides of the four sides around the first accommodating recess portion  48 , the three sides being other than the side to which the protective member  15  is attached. Thus, an outer perimeter region around the first accommodating recess portion  48 , excluding the protective member  15 -side opening, is sealed. 
     Furthermore, the base member  14  and the head fixing member  13  are adhered to the protective member  15  by a second adhesive  60 . Concretely, the second adhesive  60  adheres a protective member  15 -side flat side surface of the head fixing member  13 , that is, a surface thereof that intersects (orthogonally in this exemplary embodiment) the first surface  61  (which hereinafter will be referred to as second surface  62 ), and a protective member  15 -side flat side surface of the base member  14 , that is, a surface thereof extending substantially flush or parallel with the second surface  62  (which hereinafter will be referred to as third surface  63 ), and a base member  14 -side (or head fixing member  13 -side) flat surface of the protective member  15 , that is, an end surface of the second partition wall  57  (which hereinafter will be referred to as fourth surface  64 ). In short, the fourth surface  64  of the protective member  15  is disposed along the second surface  62  and the third surface  63 , which extends in planar directions of the second surface  62 , and is adhered to the second surface  62  and the third surface  63  by the second adhesive  60 . In this exemplary embodiment, the second adhesive  60  is provided in an outer perimeter region around the second accommodating recess portion  55 . That is, the second surface  62  and the third surface  63  are adhered to the fourth surface  64  by the second adhesive  60 , on three sides of the four sides around the second accommodating recess portion  55 , the three sides being other than the upper side of the second accommodating recess portion  55 . Thus, the second accommodating recess portion  55 , which is in communication with the first accommodating recess portion  48 , is sealed on its outer perimeter region, except the upper opening of the second accommodating recess portion  55 . Therefore, the accommodating space  51 , except its upper opening, is closed and sealed by the head fixing member  13 , the base member  14 , the protective member  15 , the first adhesive  59 , and the second adhesive  60 . 
     A portion that includes an intersection portion  66  at which the first adhesive  59  and the second adhesive  60  substantially intersect each other (i.e., an intersection portion  66  at which a joining surface between the head fixing member  13  and the base member  14  and a joining surface of the head fixing member  13  and the base member  14  with the protective member  15  intersect each other, that is, an intersection portion  66  across which the head fixing member  13  and the base member  14  face each other, the head fixing member  13  and the protective member  15  face each other, and the base member  14  and the protective member  15  face each other) is provided with an adhesive receiving space  67  (corresponding to an adhesive receiving portion in the invention) which communicates with the intersection portion  66  and into which at least one of the first adhesive  59  and the second adhesive  60  can flow. In this exemplary embodiment, the adhesive receiving space  67  is formed by obliquely chamfering the head fixing member  13  from a first surface  61  side toward a second surface  62  side (i.e., a third member side). In other words, a corner portion of the head fixing member  13  at which the first surface  61  and the second surface  62  intersect (a second surface  62 -side edge of the first surface  61 ) is chamfered, that is, beveled, to provide the corner portion with the adhesive receiving space  67 . Thus, since the adhesive receiving space  67  is formed by chamfering, it becomes easy to form the adhesive receiving space  67  and therefore it becomes easy to manufacture the head fixing member  13 . Note that in this exemplary embodiment, the chamfer is formed so as to slope downward at an angle of substantially 45 degrees to the first surface  61 . 
     The adhesive receiving space  67  is a space that is filled with either one or both of the first adhesive  59  and the second adhesive  60  depending on variations in the amount of the first adhesive  59  (the amount applied). That is, which of the adhesives fills the adhesive receiving space  67  changes depending on the amount of the first adhesive  59  (the amount applied) at the time of fixing the head fixing member  13  and the base member  14  to each other. For example, when the amount of the first adhesive  59  is small, e.g., a designed lower-limit value, the first adhesive  59  substantially does not flow into the adhesive receiving space  67  and the adhesive receiving space  67  is filled with the second adhesive  60 . On the other hand, when the amount of the first adhesive  59  is large, e.g., a designed upper-limit value, the first adhesive  59  flows into the adhesive receiving space  67  so as to substantially fill up the adhesive receiving space  67 . Furthermore, when the amount of the first adhesive  59  is an intermediate value between the designed lower-limit value and the designed upper-limit value, the first adhesive  59  flows into a part of the adhesive receiving space  67  so as to partially fill the adhesive receiving space  67  and the other part of the adhesive receiving space  67  is filled with the second adhesive  60 . Note that the first adhesive  59  and the second adhesive  60  may be the same adhesive or different adhesives. The first adhesive  59  and the second adhesive  60  may be, for example, an epoxy-based adhesive, a silicon-based adhesive, etc. In short, the first adhesive  59  and the second adhesive  60  may be any adhesive as long as the adhesive is in a liquid state before hardening. 
     Next, a production method for the recording head  3 , in particular, a method for joining the head fixing member  13 , the base member  14 , and the protective member  15 , will be described in detail.  FIGS. 7 to 9  are sectional views of portions illustrating a production method for the recording head  3 . 
     First, the head bodies  12  and the like are fixed to the head fixing member  13 , the first circuit substrate  49  is disposed in the first accommodating recess portion  48 , and the flexible substrates  35  are connected to the first circuit substrate  49 . Then, the process proceeds to a first adhering step of adhering the head fixing member  13  and the base member  14  to each other. Specifically, first, the first adhesive  59  in a state prior to hardening is applied to the head fixing member  13  (concretely, to the first surface  61 , which defines side edges of the first accommodating recess portion  48 ). Next, as illustrated in  FIG. 7 , either one or both of the head fixing member  13  and the base member  14  are moved relatively to each other in such a direction (see an arrow in  FIG. 7 ) that the base member  14  approaches the head fixing member  13 . Thus, the head fixing member  13  and the base member  14  are adhered to each other, with the first adhesive  59  sandwiched therebetween. Specifically, until a predetermined time needed for the first adhesive  59  to harden elapses, relative positions of the head fixing member  13  and the base member  14  are maintained. At this time, as illustrated in  FIG. 8 , the first adhesive  59  is pressed and spread between the head fixing member  13  and the base member  14  so as to occupy a predetermined location between the head fixing member  13  and the base member  14  and fill a space therebetween. Note that even if the amount of the first adhesive  59  happens to be large due to variation in the application of the adhesive, some of the first adhesive  59  flows into the adhesive receiving space  67 , so that the first adhesive  59  can be inhibited from squeezing out to the outer sides of the head fixing member  13  and the base member  14 . In the exemplary embodiment, although in the first adhering step, the first adhesive  59  is applied to the head fixing member  13  side, this is not restrictive. For example, the first adhesive  59  may be applied to the base member  14  side or may also be applied to both the head fixing member  13  side and the base member  14  side. 
     After the head fixing member  13  and the base member  14  are adhered together in the first adhering step, the second circuit substrate  56  is connected to the first circuit substrate  49  and the second circuit substrate  56  is attached to the side surface of the base member  14 . Next, the process proceeds to a second adhering step of adhering the head fixing member  13  and the base member  14  to the protective member  15 . Specifically, first, the second adhesive  60  in a state prior to hardening is applied to the protective member  15  (concretely, to the fourth surface  64 , which defines side edges of the second accommodating recess portion  55 ). Then, as illustrated in  FIG. 9 , either a stacked member obtained by stacking the head fixing member  13  and the base member  14  or the protective member  15  or both of them are moved relatively to each other in such a direction (see an arrow in  FIG. 9 ) that the protective member  15  approaches the head fixing member  13  (or the base member  14 ). Thus, the head fixing member  13  and the base member  14  are adhered to the protective member  15 , with the second adhesive  60  sandwiched therebetween. That is, until a predetermined time needed for the second adhesive  60  to harden elapses, the relative positions of the protective member  15  and the stack of the head fixing member  13  and the base member  14  are maintained. At this time, the second adhesive  60  is pressed and spread between the protective member  15  and the head fixing member  13  and between the protective member  15  and the base member  14  so as to occupy predetermined locations between the head fixing member  13  and the protective member  15  and between the base member  14  and the protective member  15  and fill spaces therebetween. In the case where the adhesive receiving space  67  is not filled with the first adhesive  59 , the second adhesive  60  flows into the adhesive receiving space  67  (in the case where the first adhesive  59  has flown into and hardened in a portion of the adhesive receiving space  67 , the second adhesive  60  flows into the rest of the adhesive receiving space  67 ) so that the adhesive receiving space  67  is filled. On the other hand, in the case where the adhesive receiving space  67  is already filled with the first adhesive  59 , the second adhesive  60  fills a space between the head fixing member  13  and the protective member  15  and a space between the base member  14  and the protective member  15  so as to cover the first adhesive  59 . In this manner, the adhesive receiving space  67  is filled with adhesive (either one or both of the first adhesive  59  and the second adhesive  60 ) That is, in the intersection portion  66 , the first adhesive  59  and the second adhesive  60  are continuous without a gap. In the exemplary embodiment, although in the second adhering step, the second adhesive  60  is applied to the protective member  15  side, this is not restrictive. For example, the second adhesive  60  may be applied to the head fixing member  13  and the base member  14  or may also be applied to the head fixing member  13 , the base member  14 , and the protective member  15 . 
     Because the adhesive receiving space  67  is formed between the head fixing member  13  and the base member  14 , an excess amount of the first adhesive  59  applied to adhere the head fixing member  13  and the base member  14 , if there is any excess, will flow into the adhesive receiving space  67 , so that the first adhesive  59  can be inhibited from squeezing out to the outsides of the head fixing member  13  and the base member  14 . Therefore, the amount of the first adhesive  59  can be increased so that the first adhesive  59  more easily fills the joining portion between the head fixing member  13  and the base member  14 . As a result, it is possible to inhibit formation of a gap between the head fixing member  13  and the base member  14 . Furthermore, even when the amount of the first adhesive  59  happens to be small due to variation or the like so that the first adhesive  59  hardly flows into the adhesive receiving space  67 , the second adhesive  60  flows into and fills the adhesive receiving space  67 , so that formation of a gap in the intersection portion  66  can be inhibited. Thus, a periphery of the accommodating space  51  surrounded by the head fixing member  13 , the base member  14 , and the protective member  15  is sealed by the first adhesive  59  and the second adhesive  60  so that entrance of undesired matters, such as ink or dust, into the accommodating space  51  from outside the recording head  3  can be inhibited. Therefore, the staining and spoiling of the first circuit substrate  49  and the second circuit substrate  56  disposed in the accommodating space  51  can be inhibited. 
     Finally, the base member  14 , the needle holder  17 , etc. are attached to complete making the recording head  3 . Note that the production method for the recording head  3  is not limited to the foregoing method but may be any method as long as the method includes performing the first adhering step in which the head fixing member  13  and the base member  14  are adhered and then performing the second adhering step in which the head fixing member  13  and the base member  14  are adhered to the protective member  15 . For example, after the first adhering step, the head bodies  12 , the first circuit substrate  49 , etc., may be attached to the head fixing member  13 . Furthermore, before the second adhering step, the base member  14 , the needle holder  17 , etc. may be attached. 
     When the first adhesive  59  and the second adhesive  60  are different adhesives, it is desirable that the second adhesive  60  in the liquid state have lower viscosity than the first adhesive  59  in the liquid state. That is, it is desirable that the viscosity of the second adhesive  60  in the liquid state prior to hardening be lower than the viscosity of the first adhesive  59  in the liquid state prior to hardening. Due to this desirable setting, when the protective member  15  is adhered in the second adhering step, it is easier for the second adhesive  60  to fill a space between the head fixing member  13  and the base member  14  which includes the adhesive receiving space  67  and which is not filled with the first adhesive  59 . As a result, formation of a gap between the head fixing member  13  and the base member  14  can be more certainly inhibited. 
     The configuration of the adhesive receiving space  67  is not limited to the configuration illustrated above as an example in conjunction with the first exemplary embodiment but various other configurations can also be adopted for the adhesive receiving space  67 . For example, an adhesive receiving space  67  in a second exemplary embodiment illustrated in  FIG. 10  is formed by obliquely chamfering a base member  14  from the first surface  61  side toward the second surface  62  side (i.e., to the third member side). In other words, by chamfering a corner portion of the base member  14  at which the surface that is adhered to the first surface  61  of the head fixing member  13  intersects the third surface  63 , a vicinity of the corner portion is provided with the adhesive receiving space  67 . In this exemplary embodiment, this chamfer is formed with an obliquely ascending angle of substantially 45 degrees to the first surface  61 . The adhesive receiving space  67  in this exemplary embodiment, similar to that in the first exemplary embodiment, is filled with adhesive (either one or both of the first adhesive  59  and the second adhesive  60 ). Thus, in this exemplary embodiment, too, since the adhesive receiving space  67  is formed between the head fixing member  13  and the base member  14 , the first adhesive  59 , even if applied in a large amount to adhere the head fixing member  13  and the base member  14 , is inhibited from squeezing out to the outer sides of the head fixing member  13  and the base member  14 . Therefore, the amount of the first adhesive  59  can be increased so that the first adhesive  59  more easily fills the joining portion between the head fixing member  13  and the base member  14 . As a result, it is possible to inhibit formation of a gap between the head fixing member  13  and the base member  14 . Incidentally, other configurations are the same as those in the foregoing first exemplary embodiment and will not be described again here. 
     An adhesive receiving space  67  in a third exemplary embodiment illustrated in  FIG. 11  is formed by chamfering both a head fixing member  13  and a base member  14 . Specifically, the head fixing member  13  is obliquely chamfered from the first surface  61  toward the second surface  62 , and the base member  14  is obliquely chamfered from the first surface  61  side to the third surface  63  side. That is, in this exemplary embodiment, the adhesive receiving space  67  is a space extending from the head fixing member  13  to the base member  14 . The chamfer of the head fixing member  13 , similarly to that in the first exemplary embodiment, is formed with an obliquely descending angle of substantially 45 degrees to the first surface  61 . The chamfer of the base member  14 , similar to that in the second exemplary embodiment, is formed with an obliquely ascending angle of substantially 45 degrees to the first surface  61 . Furthermore, the adhesive receiving space  67  in this exemplary embodiment, similar to that in the first exemplary embodiment, is filled with adhesive (either one or both of the first adhesive  59  and the second adhesive  60 ). According to this exemplary embodiment, an adhesive receiving space  67  having a large capacity can be easily formed. Since an increased amount of adhesive can be received by the adhesive receiving space  67 , it is possible to inhibit the first adhesive  59  from squeezing out to the outer sides of the head fixing member  13  and the base member  14  even in the case where the amount of the first adhesive  59  varies to a great extent. Therefore, the amount of the first adhesive  59  can be further increased so that the first adhesive  59  even more easily fills the joining portion between the head fixing member  13  and the base member  14 . As a result, it is possible to further inhibit formation of a gap between the head fixing member  13  and the base member  14 . Incidentally, other configurations are the same as those in the foregoing first exemplary embodiment and will not be described again here. 
     An adhesive receiving space  67  in a fourth exemplary embodiment illustrated in  FIG. 12  is formed by chamfering a head fixing member  13  into a round shape from the first surface  61  side toward the second surface  62  side. That is, in this exemplary embodiment, the chamfer has a curved surface. The adhesive receiving space  67  in this exemplary embodiment, similar to that in the foregoing first exemplary embodiment, is filled with adhesive (either one or both of the first adhesive  59  and the second adhesive  60 ). According to this exemplary embodiment, the first adhesive  59  or the second adhesive  60  easily flows along the curved surface into the adhesive receiving space  67 . As a result, the adhesive receiving space  67  is more easily filled with either one or both of the first adhesive  59  and the second adhesive  60 , so that formation of a gap between the head fixing member  13  and the base member  14  can be further inhibited. Incidentally, other configurations are the same as those in the foregoing first exemplary embodiment and will not be described again here. Note that the chamfer in the second exemplary embodiment and the chamfers in the third exemplary embodiment described above can also be formed into round shapes as in this exemplary embodiment. 
     A adhesive receiving space  67  in a fifth exemplary embodiment illustrated in  FIG. 13  is formed by obliquely chamfering a head fixing member  13  from the first surface  61  side toward the second surface  62  side so that an opening width a on the first surface  61  side is larger than an opening width b on the second surface  62  side (i.e., the protective member  15  side). Note that the opening width a on the first surface  61  side (the first surface  61 -side opening width a) mentioned herein is a dimension of an opening region facing the first surface  61  side of the adhesive receiving space  67  which is measured in a direction perpendicular to the second surface  62  (or a direction perpendicular to the fourth surface  64 ). In other words, the first surface  61 -side opening width a is a distance between a first surface  61 -side end of the chamfer and a second surface  62 -side end of the same chamber which is measured in the direction perpendicular to the second surface  62 . On the other hand, the opening width b on the second surface  62  side (the second surface  62 -side opening width b) is a dimension of an opening region facing the second surface  62  side of the adhesive receiving space  67  which is measured in a direction perpendicular to the first surface  61 . In other words, the second surface  62 -side opening width b is a distance between the first surface  61 -side end and the second surface  62 -side end of the chamfer which is measured in the direction perpendicular to the first surface  61 . In short, the chamfer in this exemplary embodiment has a gently descending slope with respect to the first surface  61 . The adhesive receiving space  67  in this exemplary embodiment, similar to that in the foregoing first exemplary embodiment, is filled with adhesive (either one or both of the first adhesive  59  and the second adhesive  60 ). In this exemplary embodiment, since the first surface  61 -side opening width a is larger than the second surface  62 -side opening width b, the first surface  61 -side end of the chamfer is located farther apart from the second surface  62  (from the protective member  15 ). That is, the adhesive receiving space  67  can be formed up to a location farther apart from the second surface  62 . Therefore, even in the case where the amount of the first adhesive  59  used to adhere the head fixing member  13  and the base member  14  tends to vary greatly, it can be made more certain that the first adhesive  59  will reach the adhesive receiving space  67 . For example, even when the amount of the first adhesive  59  applied is small so that, in the space between the head fixing member  13  and the base member  14 , the first adhesive  59  does not reach the second surface  62  or the third surface  63 , the first adhesive  59  is more likely to reach the adhesive receiving space  67 . Then, at the time of adhering the protective member  15 , the second adhesive  60  fills the adhesive receiving space  67 . Therefore, formation of a gap between the head fixing member  13  and the base member  14  can be further inhibited. Incidentally, other configurations are the same as those in the foregoing first exemplary embodiment and will not be described again here. Furthermore, the dimensions of the chamfers illustrated as examples in the foregoing exemplary embodiments can also be set in the same manner as the dimension of the chamfer in this exemplary embodiment. 
     By the way, although in the foregoing exemplary embodiments, the chamfers are each uniform in shape along a direction parallel to the first surface  61  and parallel to the second surface  62 , this is not restrictive. For example, in a head fixing member  13  in a sixth exemplary embodiment illustrated in  FIG. 14  and a head fixing member  13  in a seventh exemplary embodiment illustrated in  FIG. 15 , a chamfer is formed so as to change in shape (size) in a direction parallel to the first surface  61  and the second surface  62 . 
     Concretely, with regard to the chamfer in the sixth exemplary embodiment illustrated in  FIG. 14 , a dimension c of the chamfer measured between a first surface  61 -side end and a second surface  62 -side end (i.e., a protective member  15 -side end) on the accommodating space  51  side (i.e., the inner side) is larger than a dimension d of the chamfer measured between a first surface  61 -side end and a second surface  62 -side end (i.e., a protective member  15 -side end) on the opposite side of the chamfer to the accommodating space  51  (i.e., the outer side of the chamfer). Furthermore, in this exemplary embodiment, the chamfer is formed so that the dimension between the first surface  61 -side end and the second surface  62 -side end (i.e., the protective member  15 -side end) becomes gradually smaller from the accommodating space  51  side toward the opposite side (the outer side). This configuration can inhibit the first adhesive  59  from squeezing out to the side remote from the accommodating space  51  (i.e., to the outer side) when the head fixing member  13  and the base member  14  are adhered. This also can inhibit the second adhesive  60  from squeezing out to the side remote from the accommodating space  51  (i.e., to the outer side) when the protective member  15  is adhered. As a result, as illustrated in  FIG. 14 , even in the case where, for example, a screw hole  69  for fixing the head fixing member  13  and the carriage  4  to each other is provided at the outer side of the first partition wall  50 , the adhesive (the first adhesive  59  or the second adhesive  60 ) can be inhibited from depositing in or near the screw hole  69 . As a result, an inconvenient situation in which the inserting or fastening of a screw into the screw hole  69  is impeded by the adhesive can be substantially avoided. Therefore, the reliability of the recording head  3  can be increased. 
     With regard to the chamfer in the seventh exemplary embodiment illustrated in  FIG. 15 , a dimension of the chamfer measured between a first surface  61 -side end and a second surface  62 -side end (i.e., a protective member  15 -side end) on the opposite side of the chamfer to the accommodating space  51  (i.e., on the outer side of the chamfer) is substantially zero. That is, in this exemplary embodiment, too, a dimension e of the chamfer measured between a first surface  61 -side end and a second surface  62 -side end (i.e., a protective member  15 -side end) on the accommodating space  51  side (i.e., the inner side) of the chamfer is larger than the dimension of the chamfer measured between the first surface  61 -side end and the second surface  62 -side end (i.e., the protective member  15 -side end) on the opposite side of the chamfer to the accommodating space  51  (on the outer side of the chamfer). Furthermore, in this exemplary embodiment, too, the chamfer is formed so that the dimension of the chamfer between the first surface  61 -side end and the second surface  62 -side end (i.e., the protective member  15 -side end) becomes gradually smaller from the accommodating space  51  side to the opposite side (the outer side). This configuration can inhibit the first adhesive  59  from squeezing out to the side remote from the accommodating space  51  (i.e., to the outer side) when the head fixing member  13  and the base member  14  are adhered. This also can inhibit the second adhesive  60  from squeezing out to the side remote from the accommodating space  51  (i.e., to the outer side) when the protective member  15  is adhered. As a result, even in the case where, for example, a screw hole  69  for fixing the head fixing member  13  and the carriage  4  to each other is provided at the outer side of the first partition wall  50 , the adhesive (the first adhesive  59  or the second adhesive  60 ) can be inhibited from depositing in or near the screw hole  69 . As a result, an inconvenient situation in which the inserting or fastening of a screw into the screw hole  69  is impeded by the adhesive can be substantially avoided. Therefore, the reliability of the recording head  3  can be increased. 
     Note that the configurations of the chamfers in the second to fifth exemplary embodiments illustrated in  FIGS. 10 to 13  and the configurations of the chamfers in the sixth and seventh exemplary embodiments illustrated in  FIGS. 14 and 15  can be combined. Furthermore, the dimension (i.e., the size) of the chamfer between the first surface  61 -side end and the second surface  62 -side end may be smaller at the accommodating space  51  side than the side remote from the accommodating space  51  according to design. Thus, by changing the size of the chamfer according to design, control of the squeeze-out of the adhesive can be facilitated. That is, by making the chamfer smaller in size on one of the accommodating space  51  side and the side remote from the accommodating space  51  on which it is desired to inhibit the squeezing-out of the adhesive the squeezing-out of the adhesive to that side can be inhibited. As a result, for example, a defective condition in which the adhesive deposits on other component parts or the like can be inhibited and the reliability of the recording head  3  can be increased. 
     Although in the foregoing exemplary embodiments, the accommodating space  51  is made up of the first accommodating recess portion  48  that houses the first circuit substrate  49  and the second accommodating recess portion  55  that houses the second circuit substrate  56  as an example configuration, this does not limit the invention. For example, a configuration in which neither a second circuit substrate nor a second accommodating recess portion is provided and a first accommodating recess portion is sealed by a base member and a protective member may be adopted. In this case, the protective member may be a flat platy member that does not define a second accommodating recess portion. Furthermore, a first accommodating recess portion may be formed on the base member side. Further, although in the foregoing exemplary embodiments, the adhesive receiving space  67  is formed on either one or both of the head fixing member  13  side and the base member  14  side, this is not restrictive. For example, a configuration in which an adhesive receiving space is formed on a protective member can also be adopted. 
     Further, although in the foregoing exemplary embodiments, the driving elements that cause pressure changes in the ink in the pressure chambers are so-called flexural vibration type piezoelectric elements as an example, this is not restrictive. For example, so-called longitudinal vibration type piezoelectric elements, heating elements, and various actuators, such as electrostatic actuators that change the capacity of the pressure chambers by using electrostatic force can also be adopted. Furthermore, although in the foregoing exemplary embodiments, an example of the recording head is a so-called serial head that ejects ink while scanning (moving back and forth) in directions (main scanning directions) that intersect the transport direction of recording media (subsidiary scanning direction), this is not restrictive. The invention is also applicable to a printer that includes a so-called line head in which a plurality of recording heads are arranged in the recording medium width direction. 
     Furthermore, although the foregoing description has been given in conjunction with the ink jet type recording head  3  provided as an example of a liquid ejecting head, the invention is also applicable to other types of liquid ejecting heads that include flow path members. For example, the invention is also applicable to, for example, color material ejecting heads for use in producing color filters of liquid crystal displays and the like, electrode material ejecting heads for use in forming electrodes of organic electroluminescence (EL) displays, field emission displays (FEDs), etc., bioorganic material ejecting heads for use in producing bio-chips (biochemical devices), etc. A color material ejecting head for a display production apparatus ejects solutions of various color materials of red (R), green (G), blue (B), etc. as kinds of liquid. Furthermore, an electrode material ejecting head for an electrode forming apparatus ejects an electrode material in a liquid state as a kind of liquid and a bioorganic material ejecting head for a chip production apparatus ejects a solution of a bioorganic material as a kind of liquid. 
     The entire disclosure of Japanese Patent Application No. 2017-032041, filed Feb. 23, 2017 is expressly incorporated by reference herein.