Liquid dispensing head and recording device

Abstract

To ensure that liquid supplied to a second flow path member stably flows into a pressure chamber through a through hole.SOLUTION: A liquid discharge head comprises a first flow path member, a second flow path member, and a pressure member. The first flow path member has a first surface, a second surface on the opposite side to the first surface, a plurality of discharge holes opening on the first surface, a supply flow path, a plurality of pressure chambers communicating with the supply flow path and the plurality of discharge holes, and a recovery flow path. The second flow path member overlaps the second surface, supplies liquid to the supply flow path, recovers liquid from the recovery flow path, and is formed by using resin. The plurality of pressure chambers are arranged in a plurality of rows along the second surface. The pressure member overlaps the second surface across the plurality of rows and across two or more pressure chambers within each row. The second flow path member has, on a third surface on the second surface side of the first flow path member, a recess extending across the plurality of rows and across two or more pressure chambers within each row, with the pressure member positioned in the recess.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a liquid ejection head and a recording apparatus.

Background Art

[0002] Conventionally, as a printing head, a liquid ejection head that performs various types of printing by ejecting a liquid onto a recording medium is known. As such a liquid ejection head, a first flow path member having a first surface, a plurality of ejection holes provided in the first surface, a plurality of pressure chambers respectively communicating with the plurality of ejection holes, and a second surface located on the opposite side of the first surface, a pressure member provided on the second surface, a second flow path member having a third surface, a fourth surface located on the opposite side of the third surface, a raised portion protruding from the fourth surface, and a first through hole provided in the raised portion are known. Thereby, the liquid supplied to the second flow path member is suppressed from flowing into the inside through the first through hole (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

[0004] The liquid ejection head of the present disclosure includes a first flow path member having a first surface, a plurality of ejection holes provided in the first surface, a plurality of pressure chambers respectively communicating with the plurality of ejection holes, and a second surface located on the opposite side of the first surface, a pressure member provided on the second surface, a third surface joined to a region of the second surface where the pressure member is not disposed, and a second flow path member having a through hole communicating with the plurality of pressure chambers, and a housing placed on the opposite side of the third surface with respect to the second flow path member, and the through hole opens on the opposite side of the second flow path member from the third surface and outside the housing.

[0005] The recording device of this disclosure is characterized by comprising the liquid discharge head, a transport unit for transporting a recording medium to the liquid discharge head, and a control unit for controlling the liquid discharge head. [Brief explanation of the drawing]

[0006] [Figure 1] (a) is a schematic side view showing a recording device including a liquid discharge head according to the first embodiment, and (b) is a schematic top view showing the recording device shown in (a). [Figure 2] This is an exploded perspective view of the liquid dispensing head according to the first embodiment. [Figure 3] (a) is a perspective view of the liquid discharge head in Figure 2, and (b) is a cross-sectional view of IIIb-IIIb in Figure 3(a). [Figure 4] (a) is an exploded perspective view of the head body, and (b) is a perspective view of the second flow channel member from the third surface. [Figure 5] (a) is a plan view of the second flow channel member and actuator substrate, and (b) is a bottom view of the first flow channel member and actuator substrate. [Figure 6] This is a plan view showing a magnified portion of Figure 5. [Figure 7] (a) is a plan view showing an enlarged portion of Figure 6, and (b) is a cross-sectional view taken along the line VIIb-VIIb in Figure 7(a). [Figure 8] (a) is a plan view of the second flow channel member, and (b) is a cross-sectional view of the liquid discharge head shown in enlargement. [Figure 9] The image shows a liquid discharge head according to the second embodiment, where (a) is a perspective view of the second flow channel member as seen from the third surface, and (b) is an enlarged cross-sectional view showing a part of the liquid discharge head according to the second embodiment. [Figure 10] This shows a liquid discharge head according to a third embodiment, and is a perspective view taken from the third surface side of the second flow channel member. [Figure 11] (a) is a plan view showing an enlarged portion of the liquid discharge head according to the third embodiment, and (b) is a cross-sectional view taken along the line XIb-XIb in Figure 11(a). [Modes for carrying out the invention]

[0007] <First Embodiment> A color inkjet printer 1 (hereinafter referred to as "printer 1") including a liquid ejection head 2 according to the first embodiment will be described with reference to Figure 1. The drawing shows the first direction D1, the second direction D2, the third direction D3, the fourth direction D4, the fifth direction D5, and the sixth direction D6. The first direction D1 is one side in the direction in which the first common flow path 20 and the second common flow path 24 extend, and the fourth direction D4 is the other side in the direction in which the first common flow path 20 and the second common flow path 24 extend. The second direction D2 is one side in the direction in which the first integrated flow path 22 and the second integrated flow path 26 extend, and the fifth direction D5 is the other side in the direction in which the first integrated flow path 22 and the second integrated flow path 26 extend. The third direction D3 is one direction perpendicular to the direction in which the first integrated channel 22 and the second integrated channel 26 extend, and the sixth direction D6 is the other direction perpendicular to the direction in which the first integrated channel 22 and the second integrated channel 26 extend.

[0008] The printer 1 moves the recording medium P relative to the liquid ejection head 2 by transporting it from the transport roller 74a to the transport roller 74b. The control unit 76 controls the liquid ejection head 2 based on image and character data to eject liquid toward the recording medium P, causing droplets to land on the recording medium P and printing on the recording medium P.

[0009] In this embodiment, the liquid ejection head 2 is fixed to the printer 1, and the printer 1 is a so-called line printer. Another embodiment of the recording device is a so-called serial printer.

[0010] A flat head mounting frame 70 is fixed to the printer 1 so as to be approximately parallel to the recording medium P. The head mounting frame 70 has 20 holes (not shown), and 20 liquid ejection heads 2 are mounted in each hole. Five liquid ejection heads 2 constitute one head group 72, and the printer 1 has four head groups 72.

[0011] The liquid ejection head 2 has an elongated shape extending from the second direction D2 to the fifth direction D5. Within one head group 72, three liquid ejection heads 2 are aligned along the second direction D2 to the fifth direction D5, while the other two liquid ejection heads 2 are positioned offset in the sixth direction D5. Adjacent liquid ejection heads 2 are arranged so that the printable area of ​​each liquid ejection head 2 connects from the second direction D2 to the fifth direction D5, or so that their ends overlap, enabling gap-free printing in the width direction of the recording medium P.

[0012] The four printhead groups 72 are arranged in the third direction D3 to the sixth direction D6. Each liquid ejection head 2 is supplied with ink from a liquid tank (not shown). Each liquid ejection head 2 belonging to one printhead group 72 is supplied with ink of the same color, and the four printhead groups print four colors of ink. The colors of the ink ejected from each printhead group 72 are, for example, magenta (M), yellow (Y), cyan (C), and black (K).

[0013] Note that the number of liquid ejection heads 2 installed in printer 1 may be as small as one if printing a single color within the printable area of ​​one liquid ejection head 2. The number of liquid ejection heads 2 included in head group 72, or the number of head group 72, can be changed as appropriate depending on the object to be printed and the printing conditions. For example, the number of head group 72 may be increased to print multiple colors. Also, by arranging multiple head group 72 that print the same color and printing alternately in the transport direction, the printing speed, i.e., the transport speed, can be increased. Alternatively, multiple head group 72 that print the same color may be prepared and arranged offset in the third direction D3 to increase the resolution in the width direction of the recording medium P.

[0014] Furthermore, in addition to printing colored ink, liquids such as coating agents may be printed to treat the surface of the recording medium P.

[0015] Printer 1 performs printing on a recording medium P. The recording medium P is in a state of being wound around a conveying roller 74a, passes between two conveying rollers 74c, and then passes under a liquid ejection head 2 mounted on a head mounting frame 70. Thereafter, it passes between two conveying rollers 74d and is finally collected by a conveying roller 74b.

[0016] As the recording medium P, in addition to printing paper, cloth or the like may be used. Further, Printer 1 may be configured to convey a conveying belt instead of the recording medium P, and the recording medium P may be, in addition to a roll shape, a sheet of paper, cut cloth, wood, or a tile placed on the conveying belt. Furthermore, a liquid containing conductive particles may be ejected from the liquid ejection head 2 to print wiring patterns of electronic devices or the like. Also, a predetermined amount of a chemical agent of a liquid or a liquid containing a chemical agent may be ejected from the liquid ejection head 2 toward a reaction vessel or the like to cause a reaction to produce chemicals.

[0017] In addition, a position sensor, a speed sensor, a temperature sensor, etc. may be attached to Printer 1, and the control unit 76 may control each part of Printer 1 according to the state of each part of Printer 1 that can be understood from the information of each sensor. In particular, when the ejection characteristics such as the ejection amount and ejection speed of the liquid ejected from the liquid ejection head 2 are affected by external factors, the drive signal for ejecting the liquid at the liquid ejection head 2 may be changed according to the temperature of the liquid ejection head 2, the temperature of the liquid in the liquid tank, or the pressure exerted by the liquid in the liquid tank on the liquid ejection head 2.

[0018] Next, the liquid ejection head 2 according to the first embodiment will be described with reference to FIGS. 2 to 8. In FIGS. 5 to 7, for the sake of clarity of the drawing, a flow path or the like that should be drawn with a broken line below other members is drawn with a solid line.

[0019] As shown in FIGS. 2 and 3, the liquid ejection head 2 includes a head body 2a, a housing 50, a heat sink 52, a wiring board 54, a pressing member 56, an elastic member 58, a signal transmission member 60, and a driver IC 62. Note that the liquid ejection head 2 only needs to include the head body 2a, and the housing 50, the heat sink 52, the wiring board 54, the pressing member 56, the elastic member 58, the signal transmission member 60, and the driver IC 62 do not necessarily have to be included.

[0020] The signal transmission member 60 is drawn out from the head body 2a of the liquid ejection head 2, and the signal transmission member 60 is electrically connected to the wiring board 54. A driver IC 62 for controlling the driving of the liquid ejection head 2 is provided on the signal transmission member 60. The driver IC 62 is pressed against the heat sink 52 by the pressing member 56 via the elastic member 58. Note that illustration of a support member for supporting the wiring board 54 is omitted.

[0021] The heat sink 52 can be formed of metal or an alloy, and is provided to radiate the heat of the driver IC 62 to the outside. The heat sink 52 is joined to the housing 50 with screws or an adhesive.

[0022] The housing 50 is placed on the head body 2a, and the housing 50 and the heat sink 52 cover each member constituting the liquid ejection head 2. The housing 50 includes openings 50a, 50b, 50c and a heat insulating portion 50d.

[0023] The openings 50a are respectively provided so as to face the third direction D3 and the sixth direction D6, and the heat sink 52 is arranged so as to close the openings 50a. The opening 50b opens downward, and the wiring board 54 and the pressing member 56 are arranged inside the housing 50 through the opening 50b. The opening 50c opens upward, and a connector (not shown) provided on the wiring board 54 is accommodated.

[0024] The heat-insulating section 50d is provided to extend from the second direction D2 to the fifth direction D5 and is positioned between the heat sink 52 and the head body 2a. This makes it difficult for the heat dissipated by the heat sink 52 to be transferred to the head body 2a. The housing 50 can be made of metal, alloy, or resin.

[0025] As shown in Figure 4(a), the head body 2a has a long shape extending from the second direction D2 to the fifth direction D5, and includes a first flow channel member 4, a second flow channel member 6, and a piezoelectric actuator substrate 40. The piezoelectric actuator substrate 40 and the second flow channel member 6 are provided on the first flow channel member 4. The piezoelectric actuator substrate 40 is placed in the dashed area E shown in Figure 4(a). The piezoelectric actuator substrate 40 is provided to pressurize a plurality of pressurizing chambers 10 (see Figure 7(b)) provided in the first flow channel member 4, and has a plurality of displacement elements 48 (see Figure 7(b)). The piezoelectric actuator substrate 40 having the displacement elements 48 that pressurize the pressurizing chambers 10 is the pressurizing member, and the pressurizing member will be described using the piezoelectric actuator substrate below.

[0026] The first flow channel member 4 has a flow channel formed inside, which guides the liquid supplied from the second flow channel member 6 to the discharge hole 8 (see Figure 7(b)). The first flow channel member 4 has a first surface 4-1 and a second surface 4-2, with the discharge hole 8 formed on the first surface 4-1. In addition, openings 20a and 24a are formed on the second surface 4-2.

[0027] The openings 20a are arranged along the second direction D2 to the fifth direction D5 and are located at the end of the second surface 4-2 in the third direction D3. The openings 24a are arranged along the second direction D2 to the fifth direction D5 and are located at the end of the second surface 4-2 in the sixth direction D6.

[0028] The second flow channel member 6 has a flow channel formed inside and guides liquid supplied from an external liquid tank to the first flow channel member 4. The second flow channel member 6 has a third surface 6-3 and a fourth surface 6-4, and the third surface 6-3 of the second flow channel member 6 rests on the second surface 4-2 of the first flow channel member 4.

[0029] The second flow channel member 6 is joined to the first flow channel member 4 via an adhesive (not shown) outside the mounting area E of the piezoelectric actuator substrate 40, which is shown by the dashed line. As a result, the first flow channel member 4 and the second flow channel member 6 are in communication with each other.

[0030] As shown in Figures 4 and 5, the second flow channel member 6 has a plurality of first through holes 6a, through holes 6b and 6c, a first opening 6d, openings 22a and 26a, and a raised portion 6e. The raised portion 6e has a connecting portion 6f that connects adjacent first through holes 6a. The first through holes 6a are provided in the raised portion 6e so as to extend from the second direction D2 to the fifth direction D5, and are located outside the mounting area E of the piezoelectric actuator substrate 40. A signal transmission member 60 is inserted through the first through holes 6a.

[0031] The through-hole 6b is located at the end of the second flow channel member 6 in the second direction D2, and supplies liquid from the liquid tank to the second flow channel member 6. The through-hole 6c is located at the end of the second flow channel member 6 in the fifth direction D5, and recovers liquid from the second flow channel member 6 into the liquid tank. The first opening 6d is provided on the third surface 6-3 of the second flow channel member 6, and the piezoelectric actuator substrate 40 is housed in the space formed by the first opening 6d and the first flow channel member 4.

[0032] The opening 22a is provided on the third surface 6-3 of the second flow channel member 6 and extends from the second direction D2 to the fifth direction D5. The opening 22a is formed at the end of the second flow channel member 6 in the third direction D3 and is located on the third direction D3 side of the first through hole 6a. The opening 22a communicates with the through hole 6b, and the opening 22a is sealed by the first flow channel member 4 to form the first integrated flow channel 22.

[0033] The opening 26a is provided on the third surface 6-3 of the second flow channel member 6 and extends from the second direction D2 to the fifth direction D5. The opening 26a is formed at the end of the second flow channel member 6 in the sixth direction D6 and is located on the sixth direction D6 side of the first through hole 6a. The opening 26a communicates with the through hole 6c, and the opening 26a is sealed by the first flow channel member 4 to form the second integrated flow channel 26.

[0034] The first integrated channel 22 is formed to extend from the second direction D2 to the fifth direction D5 and supplies liquid to the opening 20a of the first channel member 4. The second integrated channel 26 is formed to extend from the second direction D2 to the fifth direction D5 and recovers liquid from the opening 24a of the first channel member 4.

[0035] The raised portion 6e protrudes upward from the fourth surface 6-4 and is positioned higher than the fourth surface 6-4. The first through-hole 6a is provided in the raised portion 6e, and the height of the surface where the first through-hole 6a is formed is higher than that of the fourth surface 6-4 where the through-holes 6b and 6c are formed. As a result, even if liquid leaks onto the fourth surface 6-4 from the through-holes 6b and 6c, the leaked liquid is less likely to flow into the interior through the first through-hole 6a because the first through-hole 6a is provided in the raised portion 6e. The height of the raised portion 6e can be 1 to 5 mm, and a height of 1 mm or more makes it difficult for liquid to flow in from the first through-hole 6a.

[0036] The connecting portion 6f is provided to connect adjacent first through holes 6a and is formed to extend from the second direction D2 to the fifth direction D5. With the provision of the connecting portion 6f, the piezoelectric actuator substrate 40 is covered by the connecting portion 6f, making it difficult for liquid to adhere to the piezoelectric actuator substrate 40 located at the first opening 6d.

[0037] Furthermore, since the connecting portion 6f connects the first through holes 6a, the rigidity of the second flow channel member 6 can be increased, making it less likely for the second flow channel member 6 to deform.

[0038] With the above configuration, in the second flow channel member 6, the liquid supplied from the liquid tank to the through hole 6b is supplied to the first integrated flow channel 22, flows into the first common flow channel 20 through openings 20a and 22a, and the liquid is supplied to the first flow channel member 4. Then, the liquid recovered by the second common flow channel 24 flows into the second integrated flow channel 26 through openings 24a and 26a, and the liquid is recovered to the outside through the through hole 6c.

[0039] The first flow channel member 4 will be explained using Figures 5-7.

[0040] The first flow channel member 4 is formed by stacking multiple plates 4a to 4g and has a first surface 4-1 and a second surface 4-2. A piezoelectric actuator substrate 40 is placed on the second surface 4-2, and liquid is discharged from the discharge hole 8 provided on the first surface 4-1. The multiple plates 4a to 4g can be made of metal, alloy, or resin. Alternatively, the first flow channel member 4 may be integrally formed from resin without stacking the multiple plates 4a to 4g.

[0041] The first flow channel member 4 has a plurality of first common flow channels 20, a plurality of second common flow channels 24, and a plurality of individual units 15, and openings 20a and 24a are formed on the second surface 4-2.

[0042] The first common channel 20 is provided to extend from the first direction D1 to the fourth direction D4 and is formed to communicate with the opening 20a. In addition, multiple first common channels 20 are arranged in a row from the second direction D2 to the fifth direction D5.

[0043] The second common channel 24 is provided so as to extend from the fourth direction D4 to the first direction D1 and is formed to communicate with the opening 24a. Furthermore, multiple second common channels 24 are arranged in a line from the second direction D2 to the fifth direction D5 and are positioned between adjacent first common channels 20. Therefore, the first common channels 20 and the second common channels 24 are arranged alternately from the second direction D2 to the fifth direction D5.

[0044] The discharge unit 15 is provided between adjacent first common flow channels 20 and second common flow channels 24, and is formed in a matrix shape in the planar direction of the first flow channel member 4. The angles between the first direction D1 and the fourth direction D4 and the second direction D2 and the fifth direction D5 are greater than right angles. Therefore, the discharge unit 15 connected to the same first common flow channel 20 is positioned offset in the second direction D2, enabling printing to fill a predetermined area with pixels formed by the discharged liquid.

[0045] When the ejection holes 8 are projected in the third direction D3 and the sixth direction D6, 32 ejection holes 8 are projected within the range of a virtual line R, and within the virtual line R, each ejection hole 8 is spaced 360 dpi apart. As a result, if the recording medium P is transported in a direction perpendicular to the virtual line R and printing is performed, printing can be done at a resolution of 360 dpi.

[0046] As shown in Figure 7, the discharge unit 15 has a discharge port 8, a pressurizing chamber 10, a first individual flow path 12, and a second individual flow path 14. In the liquid discharge head 2, liquid is supplied from the first individual flow path 12 to the pressurizing chamber 10, and the second individual flow path 14 recovers the liquid from the pressurizing chamber 10.

[0047] The pressurized chamber 10 has a pressurized chamber body 10a and a partial flow channel 10b. The pressurized chamber body 10a is circular in shape when viewed from above, and the partial flow channel 10b extends downward from the center of the pressurized chamber body 10a. The pressurized chamber body 10a is configured to apply pressure to the liquid in the partial flow channel 10b by receiving pressure from a displacement element 48 provided on the pressurized chamber body 10a.

[0048] The pressurized chamber body 10a has a right-circular cylindrical shape, and its planar shape is circular. The circular planar shape allows for a large amount of displacement and a large change in the volume of the pressurized chamber 10 caused by the displacement.

[0049] The partial flow path 10b has a right-circular cylindrical shape with a diameter smaller than that of the pressurized chamber body 10a, and its planar shape is circular. When viewed from the second surface 4-2, the partial flow path 10b is positioned to fit within the pressurized chamber body 10a. The partial flow path 10b connects the pressurized chamber body 10a to the discharge port 8.

[0050] Furthermore, the partial flow path 10b may have a conical or trapezoidal shape with a decreasing cross-sectional area toward the discharge hole 8. This allows for increased flow resistance in the first common flow path 20 and the second common flow path 24, thereby reducing the difference in pressure loss.

[0051] The pressurized chambers 10 are arranged along both sides of the first common flow path 20, and the first common flow path 20 and the pressurized chambers 10 located on either side of it are connected via the first individual flow path 12. In addition, the pressurized chambers 10 are arranged along both sides of the second common flow path 24, and the second common flow path 24 and the pressurized chambers 10 located on either side of it are connected via the second individual flow path 14.

[0052] The first individual channel 12 connects the first common channel 20 and the pressurized chamber body 10a. The first individual channel 12 extends upward from the upper surface of the first common channel 20, then extends in the second direction D2 or the fifth direction D5, and is connected to the lower surface of the pressurized chamber body 10a.

[0053] The second individual channel 14 connects the second common channel 24 and the partial channel 10b. The second individual channel 14 extends from the lower surface of the second common channel 24 toward the second direction D2 or the fifth direction D5, then extends toward the first direction D1 or the fourth direction D4, and is connected to the side surface of the partial channel 10b.

[0054] With the above configuration, in the first flow channel member 4, the liquid supplied to the first common flow channel 20 through the opening 20a flows into the pressurized chamber body 10a via the first individual flow channel 12 and is supplied to the partial flow channel 10b, with some of the liquid being discharged from the discharge hole 8. The remaining liquid is then recovered from the partial flow channel 10b to the second common flow channel 24 via the second individual flow channel 14, and recovered from the first flow channel member 4 to the second flow channel member 6 through the opening 24a.

[0055] A piezoelectric actuator substrate 40, including displacement elements 48, is bonded to the upper surface of the first flow channel member 4, and each displacement element 48 is positioned on the pressurized chamber 10. The piezoelectric actuator substrate 40 occupies a region that is substantially the same shape as the group of pressurized chambers formed by the pressurized chamber 10. Furthermore, the openings of each pressurized chamber 10 are closed by bonding the piezoelectric actuator substrate 40 to the second surface 4-2 of the first flow channel member 4.

[0056] The piezoelectric actuator substrate 40 has a laminated structure consisting of two piezoelectric ceramic layers 40a and 40b, which are piezoelectric materials. Each of these piezoelectric ceramic layers 40a and 40b has a thickness of approximately 20 μm. Both of the piezoelectric ceramic layers 40a and 40b extend across multiple pressurized chambers 10.

[0057] These piezoelectric ceramic layers 40a and 40b are, for example, ferroelectric lead zirconate titanate (PZT), NaNbO3, BaTiO3, (BiNa)NbO3, and BiNaNb5O. 15 It consists of ceramic materials such as a diaphragm. The piezoelectric ceramic layer 40b acts as a diaphragm and does not necessarily have to be a piezoelectric material; instead, other non-piezoelectric ceramic layers or metal plates may be used.

[0058] The piezoelectric actuator substrate 40 has a common electrode 42, individual electrodes 44, and a connecting electrode 46 formed on it. The common electrode 42 is formed over almost the entire surface in the plane direction in the region between the piezoelectric ceramic layer 40a and the piezoelectric ceramic layer 40b. The individual electrodes 44 are positioned on the upper surface of the piezoelectric actuator substrate 40, facing the pressurizing chamber 10.

[0059] The portion of the piezoelectric ceramic layer 40a sandwiched between the individual electrodes 44 and the common electrode 42 is polarized in the thickness direction and forms a unimorph displacement element 48 that displaces when a voltage is applied to the individual electrodes 44. Therefore, the piezoelectric actuator substrate 40 has multiple displacement elements 48.

[0060] The common electrode 42 can be formed from a metallic material such as Ag-Pd, and its thickness can be approximately 2 μm. The common electrode 42 has a surface electrode for the common electrode (not shown) on the piezoelectric ceramic layer 40a, and the surface electrode for the common electrode is connected to the common electrode 42 via a via hole formed through the piezoelectric ceramic layer 40a, and is grounded and maintained at ground potential.

[0061] The individual electrode 44 is made of a metallic material such as Au, and has an individual electrode body 44a and an extension electrode 44b. As shown in Figure 7(a), the individual electrode body 44a is formed in a nearly circular shape when viewed from above, and is smaller than the pressurized chamber body 10a. The extension electrode 44b is drawn out from the individual electrode body 44a, and a connecting electrode 46 is formed on the extended extension electrode 44b.

[0062] The connecting electrode 46 is made of, for example, silver-palladium containing glass frit, and is formed in a convex shape with a thickness of about 15 μm. The connecting electrode 46 is electrically connected to an electrode (not shown) provided on the signal transmission member 60.

[0063] Next, the liquid discharge operation will be explained. The displacement element 48 is displaced by a drive signal supplied to the individual electrodes 44 via the driver IC 62 or the like, under control from the control unit 76. As a driving method, a so-called pull-and-drive method can be used.

[0064] The connection between the first flow channel member 4 and the second flow channel member 6 will be explained in detail using Figure 8. Note that the signal transmission member 60 is not shown in Figure 8(b).

[0065] The first flow channel member 4 and the second flow channel member 6 are connected by an epoxy adhesive (not shown), with the second surface 4-2 of the first flow channel member 4 and the third surface 6-3 of the second flow channel member 6 serving as the joining surfaces.

[0066] The second flow channel member 6 has a first integrated flow channel 22 and a second integrated flow channel 26 formed inside it, and the first integrated flow channel 22 and the second integrated flow channel 26 will be used as the first flow channel in the following description. The first integrated flow channel 22 is formed by a partition wall 22b and the second surface 4-2 of the first flow channel member 4. The second integrated flow channel 26 is formed by a partition wall 26b and the second surface 4-2 of the first flow channel member 4.

[0067] The fourth surface 6-4 of the second flow channel member 6 has a first portion 6-4a, a second portion 6-4b, and a third portion 6-4c. The first portion 6-4a is located on the first integrated flow channel 22 and the second integrated flow channel 26. The second portion 6-4b is located on the partition wall 22b of the first integrated flow channel 22 and the partition wall 26b of the second integrated flow channel 26. The third portion 6-4c is located outside the first opening 6d and is a portion other than the first portion 6-4a and the second portion 6-4b.

[0068] The raised portion 6e is provided projecting upward from the fourth surface 6-4 of the second flow channel member 6. In a plan view, the raised portion 6e is located at the center of the second direction D2, fifth direction D5, third direction D3, and sixth direction D6 of the fourth surface 6-4 of the second flow channel member 6. In a plan view, the outer circumference 7a of the raised portion 6e is located inward from the outer circumference 7b of the fourth surface 6-4. Also, the outer circumference of the first opening 6d is located inward from the outer circumference 7a of the raised portion 6e.

[0069] The method for connecting the first flow channel member 4 and the second flow channel member 6 will now be described. First, adhesive is applied to the third surface 6-3 of the second flow channel member 6, and it is placed on top of the second surface 4-2 of the first flow channel member 4 while aligning it. Next, the fourth surface 6-4 of the second flow channel member 6 is pressed using a predetermined jig to connect the first flow channel member 4 and the second flow channel member 6. Subsequently, while pressing the second flow channel member 6, a predetermined amount of heat is applied to harden the adhesive, and the first flow channel member 4 and the second flow channel member 6 are connected.

[0070] Here, when pressing the second flow channel member 6 from the fourth surface 6-4 side, the raised portion 6e protrudes from the fourth surface 6-4. Therefore, in order to connect the first flow channel member 4 and the second flow channel member 6, it is necessary to press both the upper surfaces of the fourth surface 6-4 and the raised portion 6e simultaneously. However, the fourth surface 6-4 and the raised portion 6e are of different heights, and it may not be possible to press them with a uniform force. As a result, a uniform pressing force cannot be applied to the joint surface between the first flow channel member 4 and the second flow channel member 6, which may lead to poor sealing of the joint surface between the first flow channel member 4 and the second flow channel member 6.

[0071] In contrast, in a plan view, the outer circumference 7a of the raised portion 6e of the liquid discharge head 2 is located inward from the outer circumference 7b of the fourth surface 6-4. Therefore, in a plan view, the fourth surface 6-4 of the second flow path member 6 surrounds the raised portion 6e. As a result, the first flow path member 4 and the second flow path member 6 can be connected by pressing only the fourth surface 6-4, and a uniform pressing force can be applied to the joint surface between the first flow path member 4 and the second flow path member 6. Therefore, the sealing performance between the first flow path member 4 and the second flow path member 6 can be improved.

[0072] In other words, by pressing only the fourth surface 6-4 surrounding the raised portion 6e, a uniform pressing force can be applied to the joint surface between the first flow channel member 4 and the second flow channel member 6, thereby improving the sealing performance of the joint surface between the first flow channel member 4 and the second flow channel member 6 corresponding to the fourth surface 6-4.

[0073] Note that the outer circumference 7a of the raised portion 6e refers to the outer edge of the raised portion 6e when viewed from above, and the outer circumference 7b of the fourth surface 6-4 refers to the outer edge of the fourth surface 6-4 when viewed from above.

[0074] Furthermore, the fourth surface 6-4 has a first portion 6-4a located on the first integrated channel 22 and the second integrated channel 26 that is formed flush with the surface. In other words, the fourth surface 6-4 has a first portion 6-4a located on the first integrated channel 22 and the second integrated channel 26 that is formed flat. As a result, the pressing force generated when pressing the second channel member 6 is applied uniformly to the first portion 6-4a provided on the fourth surface 6-4. Consequently, deformation is less likely to occur in the second channel member 6 located between the first portion 6-4a and the openings 22a and 26a, and deformation is less likely to occur in the first integrated channel 22 and the second integrated channel 26.

[0075] Therefore, the cross-sectional areas of the first integrated flow path 22 and the second integrated flow path 26 can be made nearly constant, the pressure loss to each discharge unit 15 (see Figure 7) can be made nearly constant, and variations in the discharge characteristics of the discharge unit 15 can be reduced.

[0076] Furthermore, the fourth surface 6-4 has a second portion 6-4b that is flush with the partition wall 22b of the first integrated channel 22 and the partition wall 26b of the second integrated channel 26. In other words, the fourth surface 6-4 has a second portion 6-4b that is flat with the partition wall 22b of the first integrated channel 22 and the partition wall 26b of the second integrated channel 26. As a result, the joint surface between the first channel member 4 and the second channel member 6 corresponding to the second portion 6-4b can be pressed with a uniform pressing force, and the sealing performance between the first channel member 4 and the second channel member 6 can be improved.

[0077] In other words, by directly pressing the second portion 6-4b against the joint surface between the first flow channel member 4 and the second flow channel member 6, which serves as the bonding surface, a uniform pressing force can be applied to the joint surface between the first flow channel member 4 and the second flow channel member 6, thereby improving the sealing performance between the first flow channel member 4 and the second flow channel member 6.

[0078] In particular, in the case of a second flow channel member 6 that is formed to be long from the second direction D2 to the fifth direction D5, the second flow channel member 6 may warp or bend in the direction from the second direction D2 to the fifth direction D5. In contrast, the liquid discharge head 2 has a second portion 6-4b that is formed flush with the surface, which allows the second portion 6-4b to be firmly pressed, thereby improving the sealing between the first flow channel member 4 and the second flow channel member 6.

[0079] Furthermore, the second flow channel member 6 has a first opening 6d on its fourth surface 6-4, and the piezoelectric actuator substrate 40 is housed in the space formed by the first opening 6d and the first flow channel member 4, with the fourth surface 6-4 located outside the first opening 6d being flush with the surface. In other words, the fourth surface 6-4 located outside the first opening 6d is formed flat. This allows a uniform pressing force to be applied to the joint surface between the first flow channel member 4 and the second flow channel member 6, and the space formed by the first opening 6d and the first flow channel member 4 can be sealed. As a result, when the piezoelectric actuator substrate 40 is placed in the space, the piezoelectric actuator substrate 40 can be sealed, reducing the possibility of damage to the liquid discharge head 2.

[0080] Furthermore, the statement that the fourth surface 6-4, the first part 6-4a, the second part 6-4b, and the third part 6-4c are formed flush with each other indicates that the fourth surface 6-4, the first part 6-4a, the second part 6-4b, and the third part 6-4c are formed flat, respectively, and that the flatness is 0.3 or less.

[0081] Furthermore, the second flow channel member 6 has a connecting portion 6f that connects adjacent first through holes 6a. Therefore, the reduction in rigidity caused by the provision of the first through holes 6a can be compensated for by the connecting portion 6f, making deformation of the second flow channel member 6 less likely. Consequently, the flatness of the fourth surface 6-4 of the second flow channel member 6 can be maintained, and the sealing performance between the first flow channel member 4 and the second flow channel member 6 can be improved.

[0082] Furthermore, since the connecting portion 6f is positioned above the piezoelectric actuator substrate 40, the piezoelectric actuator substrate 40 is covered by the connecting portion 6f, making it less likely for ink or ink mist to leak onto the piezoelectric actuator substrate 40 even if it enters from above the second flow channel member 6.

[0083] Furthermore, the signal transmission member 60 is pulled upward while in contact with the raised portion 6e that constitutes the first through hole 6a. As a result, the signal transmission member 60 is guided by the raised portion 6e and pulled upward. Consequently, the signal transmission member 60 can be easily pulled upward, improving the productivity of the liquid discharge head 2.

[0084] Although an example is shown in which the liquid discharge head 2 has multiple first through-holes 6a, it is not limited to this. The liquid discharge head 2 may have only one first through-hole 6a.

[0085] <Second Embodiment> The liquid discharge head 102 according to the second embodiment will be described with reference to Figure 9. Note that identical components are denoted by the same reference numerals.

[0086] The liquid discharge head 102 comprises a first flow channel member 4, a piezoelectric actuator substrate 40, a second flow channel member 106, a housing 150, a heat sink 152, and an elastic member 9. The second flow channel member 106 has a third surface 106-3, a fourth surface 106-4, a first through hole 106a, and a raised portion 106e. The connecting portion 106f comprises a first opening 106d opening towards the third surface 106-3 and a second opening 106g opening towards the third surface 106-3. The second opening 106g is provided in communication with the first opening 106d.

[0087] The connecting portion 106f is provided with a second opening 106g that opens to the third surface 106-3 side. This allows for weight reduction of the second flow channel member 106 while ensuring its rigidity. This is particularly useful when the liquid ejection head 102 is used in a serial printer.

[0088] Furthermore, the width of the partition wall 106f between the first through hole 106a and the second opening 106g of the connecting portion 106f is equal to the width of the partition wall 22b of the first integrated flow channel 22 and the partition wall 26b of the second integrated flow channel 26.

[0089] As a result, when the second flow channel member 106 is manufactured by injection molding, the resin filling speed of the partition wall 106f between the first through hole 106a and the second opening 106g of the connecting portion 106f, the partition wall 22b of the first integrated flow channel 22, and the partition wall 26b of the second integrated flow channel 26 can be made more uniform.

[0090] As a result, variations in thickness are less likely to occur in the connecting portion 106f, the partition wall 22b of the first integrated flow path 22, and the partition wall 26b of the second integrated flow path 26, making it possible to supply a second flow path member 106 that is less prone to deformation.

[0091] Furthermore, the statement that the thicknesses of partitions 106f, 22b, and 26b are equal includes manufacturing tolerances and is a concept that encompasses a range of ±15%.

[0092] The housing 150 is provided on the second flow channel member 106 and rests on the fourth surface 106-4, which is located outside the raised portion 106e. Therefore, compared to the case where the housing 150 is resting on the fourth surface 106-4 and the raised portion 106e, the height of the liquid discharge head 102 can be reduced, and the liquid discharge head 102 can be made smaller.

[0093] Furthermore, because the fourth surface 106-4 is formed flush with the surface, the housing 150 is stably mounted. As a result, stress is less likely to concentrate at the joint between the housing 150 and the second flow channel member 106, thereby improving the reliability of the liquid discharge head 102.

[0094] Furthermore, the elastic member 9 is provided adjacent to the outer circumference 107a of the raised portion 106e, and is provided so as to surround the outer circumference 107a while in contact with it. Therefore, when joining the housing 150 to the second flow channel member 106, even if the heat insulating portion 150d is pressed against the second flow channel member 106, the elastic member 9 will elastically deform, thereby reducing the possibility of damage to the heat insulating portion 150d.

[0095] Furthermore, since the elastic member 9 is provided so as to be in contact with the outer circumference 107a of the raised portion 106e, the sealing performance between the raised portion 106e and the housing 150 can be improved. The elastic member 9 can be formed from, for example, a resin material.

[0096] Furthermore, the elastic member 9 is in contact with the raised portion 106e and the fourth surface 106-4 of the second flow channel member 106. Therefore, even if the housing 150 is pressed against the raised portion 106e and the fourth surface 106-4, the possibility of damage to the housing 150 can be reduced.

[0097] In other words, when joining the housing 150 to the second flow channel member 106, or when joining the heat sink 152 to the housing 150, the housing 150 may be pressed toward the raised portion 106e or toward the fourth surface 106-4. However, since the elastic member 9 is in contact with both the raised portion 106e and the fourth surface 106-4 of the second flow channel member 106, damage to the housing 150 is unlikely.

[0098] Furthermore, the elastic member 9 is also provided between the housing 150 and the heat sink 152. This reduces the possibility of the heat sink 152 being damaged even when pressed against the raised portion 106e, and also improves the sealing performance of the opening 50a (see Figure 2) of the housing 150.

[0099] The elastic member 9 may be formed by applying and curing an epoxy resin, or an O-ring made of resin or metal may be used.

[0100] <Third Embodiment> The liquid discharge head 202 according to the third embodiment will be described with reference to Figures 10 and 11.

[0101] The second flow channel member 206 has a third surface 206-3, a fourth surface 206-4, a first through hole 206a, a raised portion 206e, and a connecting portion 206f.

[0102] The connecting portion 206f includes a first opening 206d opening to the third surface 206-3 side, a second opening 206g opening to the third surface 206-3 side, a third opening 206k, and a second through hole 206i. The second opening 206g is provided in communication with the first opening 206d.

[0103] The third opening 206k is provided to communicate with the first opening 206d and is provided separately from the second opening 206g. In a plan view, the third opening 206k is provided on the outside of the second opening 206g in the second direction D2 and on the outside in the fifth direction D5.

[0104] In a plan view, the connecting portion 207f has a third opening 206k located outside the second opening 206g. In other words, the third opening 206k is located outside the second opening 206g in the second direction D2 and outside in the fifth direction D5. As a result, when the second flow channel member 206 is manufactured by injection molding, even if resin is filled from the fifth direction D5 towards the second direction D2, a large amount of resin is less likely to flow into the connecting portion 207f. This makes it less likely for resin to be insufficient in the partition wall 206h formed by the first through hole 206a and the second opening 206g, the partition wall 22b of the first integrated flow channel 22, and the partition wall 26b of the second integrated flow channel 26.

[0105] In other words, the resin flowing from the fifth direction D5 towards the second direction D2 tends to flow more easily into the connecting section 206f, which has a larger cross-sectional area. However, the presence of the third opening 206k allows the cross-sectional area of ​​the partition wall 206h of the connecting section 206f to be brought closer to the cross-sectional area of ​​the partition walls 22b and 26b, thereby making the resin filling speed near the third opening 206k more uniform.

[0106] Furthermore, even when the resin is filled from the second direction D2 to the fifth direction D5, the same effect can be achieved because the third opening 206k is located on the outside of the second opening 206g in the second direction D2.

[0107] Furthermore, the third opening 206k does not necessarily have to be located on the outside of the second opening 206g in the second direction D2 and on the outside of the second opening 206g in the fifth direction D5 when viewed from above; it is sufficient if it is located upstream of the second opening 206g in the direction in which the resin is filled.

[0108] Furthermore, in a plan view, the wall constituting the third opening 206k has a recess 206j located on the opposite side from the second opening 206g. As a result, when resin is filled from the fifth direction D5 towards the second direction D2, the resin flows more easily into the connecting section 207f than into the partition walls 22b and 22d, making it less likely for resin to run out in the connecting section 207f. In other words, it is possible to ensure a sufficient amount of resin flows into the partition walls 22b and 26b while also allowing a sufficient amount of resin to flow into the connecting section 207f.

[0109] The second through-hole 206i is provided to communicate with the first opening 206d and is provided separately from the second opening 206g and the third opening 206k. The second through-hole 206i is provided between the second opening 206g and the third opening 206k.

[0110] The second through-hole 206i has a first portion 206i1 and a second portion 206i2. The first portion 206i1 is provided inward from the raised portion 206e of the second flow channel member 206. The second portion 206i2 is provided inward from one opening 206d of the second flow channel member 206. The first portion 206i1 and the second portion 206i2 are provided to communicate with each other.

[0111] The first part 206i1 is circular in shape when viewed from above. The second part 206i2 is rectangular in shape when viewed from above. When viewed from above, the second part 206i2 has vertices where its edges intersect, and these vertices are positioned opposite the second direction D2. The diagonals of the second part 206i2 are longer than the diameter of the first part 206i1. Therefore, when viewed from above, the second part 206i2 is larger than the first part 206i1.

[0112] The second portion 206i2 houses a fixing member 28. The fixing member 28 can be, for example, a nut, and is secured by a screw inserted from the side of the raised portion 206e. This allows the member provided on the second flow channel member 206 to be fixed to the second flow channel member 206.

[0113] In a plan view, the vertex of the second portion 206i2 is positioned opposite the second direction D2. Therefore, when the second flow channel member 206 is manufactured by injection molding, the flow of the supplied resin is less likely to be obstructed by the second through hole 206i. That is, after the supplied resin collides with the vertex, it flows along the edge of the second portion 206i2 to the partition wall 206h between the first through hole 206a and the second opening 206g. As a result, resin can be smoothly supplied to the partition wall 206h between the first through hole 206a and the second opening 206g. Therefore, the amount of resin supplied to the partition wall 206h is less likely to be insufficient.

[0114] Furthermore, the second portion 206i2 only needs to be polygonal in plan view, and is not limited to a rectangular shape. For example, it may be hexagonal. Also, the second through-hole 206i does not need to have the first portion 206i1 and the second portion 206i2, and may be polygonal columnar.

[0115] Although the first, second, and third embodiments have been described above, the present invention is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the invention.

[0116] For example, while an actuator substrate 40 has been given as an example of a pressurizing member, it is not limited to this. For example, a pressurizing member may be provided with a heating element in each pressurizing chamber 10, which heats the liquid inside the pressurizing chamber 10 with the heat from the heating element, and pressurizes due to the thermal expansion of the liquid.

[0117] Furthermore, while the base discharge head 2 is shown as supplying liquid from the through-hole 6b of the second flow channel member 6 and recovering the liquid that was not discharged from the through-hole 6c, it is not limited to this configuration. For example, the liquid may be supplied from the through-hole 6c of the second flow channel member 6 and the liquid that was not discharged from the through-hole 6b may be recovered.

[0118] The following concepts can be extracted from this disclosure. (Concept 1) A first flow channel member having a first surface, a plurality of discharge holes provided on the first surface, a plurality of pressurized chambers communicating with each of the plurality of discharge holes, and a second surface located on the opposite side of the first surface, A pressurizing member provided on the second surface, The device comprises a third surface, a fourth surface located opposite the third surface, a protruding portion projecting from the fourth surface, and a second flow channel member having a first through-hole provided in the protruding portion. The second flow channel member is provided on the second surface of the first flow channel member in a region where the pressurizing member is not located. A liquid dispensing head characterized in that, when viewed from above, the outer circumference of the raised portion is located inward from the outer circumference of the fourth surface. (Concept 2) The second flow channel member has a first flow channel inside, The liquid discharge head according to Concept 1, wherein the fourth surface is formed flush with the portion located on the first flow path. (Concept 3) The second flow channel member has partition walls that constitute the first flow channel, In a plan view, the liquid dispensing head according to Concept 2, wherein the portion of the fourth surface located on the partition wall is formed flush with the surface. (Concept 4) The second flow channel member has a first opening on the third surface, The pressurizing member is housed in the space formed by the first opening and the first flow channel member. A liquid dispensing head according to any one of concepts 1 to 3, wherein, in a plan view, the fourth surface located outside the first opening is formed flush with the surface. (Concept 5) The liquid discharge head according to any one of concepts 1 to 4, wherein the second flow channel member has a plurality of first through holes and has connecting portions that connect adjacent first through holes. (Concept 6) The liquid dispensing head according to Concept 5, wherein the connecting portion has a second opening on the third surface side. (Concept 7) In a plan view, the connecting portion has a third opening located outside the second opening, as described in Concept 6, for the liquid dispensing head. (Concept 8) A liquid dispensing head according to Concept 7, wherein, in a plan view, the partition wall constituting the third opening has a recess in the portion located on the opposite side from the second opening. (Concept 9) The second flow channel member is formed to be elongated in the first direction. The aforementioned connecting portion has a second through-hole for housing the fixing member. In plan view, the second through-hole has a polygonal shape, with its vertices located in the first direction, as described in Concept 8, for the liquid dispensing head. (Concept 10) The second flow channel member has a first flow channel inside, A liquid discharge head according to any one of concepts 6 to 9, wherein the thickness of the partition wall between the first through hole and the second opening of the connecting portion is equal to the thickness of the partition wall constituting the first flow path. (Concept 11) A liquid discharge head according to any one of concepts 1 to 10, wherein a signal transmission member for transmitting a signal to the pressurizing member is extended upward while in contact with the raised portion constituting the first through-hole. (Concept 12) A liquid dispensing head according to any one of concepts 1 to 11, further comprising a housing mounted on the fourth surface. (Concept 13) A liquid dispensing head according to any one of concepts 1 to 12, wherein, in plan view, an elastic member is arranged adjacent to the outer circumference of the raised portion. (Concept 14) The liquid dispensing head according to concept 13, wherein the elastic member is in contact with the raised portion and the fourth surface. (Concept 15) A liquid dispensing head as described in any one of Concepts 1 to 14, A transport unit that transports the recording medium to the liquid discharge head, A recording device characterized by comprising a control unit for controlling the liquid discharge head. [Explanation of Symbols]

[0119] 1. Color inkjet printer 2. Liquid dispensing head 2a... Head body 4. First flow channel member 4a~4g...plate 4-1...Front page 4-2...Second side 6,106,206...Second flow channel member 6a,106a,206a...1st through hole 6b,6c...Through hole 6d, 106d, 206d... First opening 6e,106e,206e...ridges 6f,106f,206f...Connection part 106g,206g...2nd opening 106h,206h...Bulkhead 206i...2nd through hole 206j...recess 206k...Third aperture 6-3,106-3,206-3...3rd page 6-4,106-4,206-4...Side 4 8...Discharge hole 10. Pressurized chamber 12. First individual channel 14. Second individual channel 15. Discharge Unit 20.. First common channel 22. First Integrated Channel (First Channel) 22a...Bulkhead 24. Second Common Channel 26. Second integrated channel (first channel) 26a...Bulkhead 40. Piezoelectric actuator substrate (pressure component) 48. Displacement element 50... cabinet 52...heat sink 76... Control Unit P... recording media

Claims

1. A first flow channel member is constructed by stacking multiple plates and has a first surface, a second surface opposite to the first surface, multiple discharge holes opening to the first surface, a third flow channel, multiple pressurizing chambers connected to the third flow channel and the multiple discharge holes, and a fourth flow channel. A second flow channel member overlapping the second surface via adhesive, Equipped with, The second flow channel member is A first channel connected to the third channel and made of resin, It has a second channel that leads to the third channel via the fourth channel, Each of the pressurized chambers that is connected to the third flow path is connected to the third flow path without passing through any other pressurized chamber. Liquid dispensing head.

2. The fourth channel is connected to the third channel via the plurality of pressurized chambers. The liquid dispensing head according to claim 1.

3. Each of the aforementioned multiple pressurized chambers is The pressurized chamber body, It has a partial flow path that extends from the pressurized chamber body toward the first surface, has a diameter smaller than the diameter of the pressurized chamber body, and connects the pressurized chamber body and the discharge hole, The first flow channel member is A plurality of first individual channels extending from the third channel to a plurality of pressurized chamber bodies, It has a plurality of second individual channels extending from a plurality of the aforementioned partial channels to the fourth channel. The liquid dispensing head according to claim 2.

4. Each of the plurality of first individual flow paths opens to the side of the first surface of the pressurized chamber body, Each of the plurality of second individual channels opens to the side surface of the partial channel. The liquid dispensing head according to claim 3.

5. The first flow channel member has a plurality of first individual flow channels extending from the third flow channel to the plurality of pressurized chambers, Each of the plurality of first individual channels has a portion in its extension from the third channel to the pressurizing chamber that has a cross-sectional area smaller than the cross-sectional area of ​​the portion of the first individual channel extending from the third channel and the cross-sectional area of ​​the portion of the first individual channel extending from the pressurizing chamber. A liquid dispensing head according to any one of claims 1 to 4.

6. The first flow channel member has a plurality of second individual flow channels extending from the plurality of pressurized chambers to the fourth flow channel, Each of the plurality of second individual channels has a portion that extends from the plurality of pressurized chambers to the fourth channel, having a cross-sectional area smaller than the portion of the second individual channel that extends from the fourth channel. A liquid dispensing head according to any one of claims 1 to 5.

7. The first flow channel member is In the planar perspective view of the second surface, a plurality of the third channels extend in parallel to each other, It has multiple openings that are open to the second surface and lead to the multiple third flow channels, The first channel has grooves extending along the plurality of openings on the surface of the second channel member that overlaps with the second surface. A liquid dispensing head according to any one of claims 1 to 6.

8. Equipped with a pressurizing member, The second flow channel member has a recess on the third surface on the side of the first flow channel member, and the pressurizing member is located in the recess. A liquid dispensing head according to any one of claims 1 to 7.

9. In the planar perspective view of the second surface, the pressurizing member and the recess extend across the plurality of pressurizing chambers. The liquid dispensing head according to claim 8.

10. In the planar perspective view of the second surface, the pressurizing member and the recess extend across the plurality of pressurizing chambers, which include two or more pressurizing chambers aligned in a first direction and two or more pressurizing chambers aligned in a second direction intersecting the first direction. The liquid dispensing head according to claim 9.

11. A first flow channel member comprising a plurality of stacked plates, having a first surface, a second surface opposite to the first surface, a plurality of discharge holes opening to the first surface, a third flow channel, a plurality of pressurizing chambers connected to the third flow channel and the plurality of discharge holes, and a fourth flow channel, A second flow channel member overlapping the second surface via adhesive, A pressurizing member is provided, Equipped with, The second flow channel member is A first channel connected to the third channel and made of resin, A second channel that leads to the third channel via the fourth channel, It has a recess that opens to the third surface on the side of the first flow channel member and where the pressurizing member is located, The second flow channel member has a raised portion on the fourth surface opposite to the first flow channel member that overlaps the entire recess in a planar perspective view of the fourth surface. Liquid dispensing head.

12. The second flow channel member is A through hole that leads to the third channel via the first channel, It has a through hole that leads to the fourth channel via the second channel. A liquid dispensing head according to any one of claims 1 to 11.

13. The first channel, the third channel, the plurality of pressurized chambers, the fourth channel, and the second channel are configured to form a circulating channel through which these channels pass in sequence. A liquid dispensing head according to any one of claims 1 to 12.

14. The second flow channel member is injection molded. A liquid dispensing head according to any one of claims 1 to 13.

15. A first flow channel member is constructed by stacking multiple plates and has a first surface, a second surface opposite to the first surface, multiple discharge holes opening to the first surface, a third flow channel, multiple pressurizing chambers connected to the third flow channel and the multiple discharge holes, and a fourth flow channel. A second flow channel member overlapping the second surface via adhesive, Equipped with, The second flow channel member is The first channel is connected to the third channel and is in contact with the resin, It has a second channel that leads to the third channel via the fourth channel, Each of the pressurized chambers that is connected to the third flow path is connected to the third flow path without passing through any other pressurized chamber. Liquid dispensing head.

16. Equipped with a pressurizing member, The aforementioned multiple pressurizing chambers are arranged in multiple rows along the second surface, The pressurizing member overlaps the second surface across the plurality of rows and across two or more pressurizing chambers within each row. The second flow channel member has a recess on the third surface of the first flow channel member on the second surface side, which extends across the plurality of rows and across two or more pressurizing chambers within each row, and the pressurizing member is located in the recess. The first channel and the second channel extend along the second surface, In a plan view, the first channel and the second channel do not overlap each other. A liquid dispensing head according to any one of claims 1 to 15.

17. Equipped with a pressurizing member, The aforementioned multiple pressurizing chambers are arranged in multiple rows along the second surface, The pressurizing member overlaps the second surface across the plurality of rows and across two or more pressurizing chambers within each row. The second flow channel member has a recess on the third surface of the first flow channel member on the second surface side, which extends across the plurality of rows and across two or more pressurizing chambers within each row, and the pressurizing member is located in the recess. The first flow channel member has a plurality of first individual flow channels extending from the third flow channel to the plurality of pressurized chambers, and a plurality of second individual flow channels extending from the plurality of pressurized chambers to the fourth flow channel. A liquid dispensing head according to any one of claims 1 to 16.

18. Equipped with a pressurizing member, The aforementioned multiple pressurizing chambers are arranged in multiple rows along the second surface, The pressurizing member overlaps the second surface across the plurality of rows and across two or more pressurizing chambers within each row. The second flow channel member has a recess on the third surface of the first flow channel member on the second surface side, which extends across the plurality of rows and across two or more pressurizing chambers within each row, and the pressurizing member is located in the recess. The first channel and the second channel extend along the second surface, In the second flow channel member, the portion constituting the first flow channel, the portion constituting the second flow channel, and the portion constituting the recess are integrally injection-molded. A liquid dispensing head according to any one of claims 1 to 17.

19. A liquid dispensing head according to any one of claims 1 to 18, A transport unit that transports the recording medium to the liquid discharge head, A control unit for controlling the liquid discharge head, A recording device equipped with the following features.

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