JP2009051188A - Liquid discharge device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid discharge head capable of removing the liquid of the circumference of a liquid discharge hole without applying force to the circumference of the liquid discharge hole. <P>SOLUTION: The liquid discharge device includes: a flow path member having a liquid discharge hole surface on which a plurality of liquid flow paths and a plurality of liquid discharge holes communicating with the plurality of liquid flow paths through a plurality of liquid pressure chambers respectively are provided; and a liquid pressure device which pressurizes the liquid in the liquid pressure chamber. The flow path member has a plurality of air suction holes provided in the liquid discharge hole surface and a plurality of air flow paths communicating with the plurality of air suction holes and the liquid discharge device having a suction device sucking air in the plurality of air flow paths is used. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid ejection device, and more particularly to a liquid ejection device mounted on an ink jet printer used for recording characters and images.

  In recent years, recording apparatuses using an inkjet recording method, such as inkjet printers and inkjet plotters, are not only printers for general consumers, but also, for example, formation of electronic circuits, manufacture of color filters for liquid crystal displays, manufacture of organic EL displays It is also widely used for industrial applications.

  In such an ink jet recording type recording apparatus, a liquid discharge head for discharging a liquid is mounted as a print head, and this type of print head is applied to an ink flow path filled with ink. It is equipped with a heater as a pressure means, heated and boiled by the heater, pressurized with air bubbles generated in the ink flow path, and ejected as ink droplets from the ink ejection holes, and filled with ink A piezoelectric method is generally known in which a part of a wall of an ink flow path is bent and displaced by a displacement element, and ink in the ink flow path is mechanically pressurized and discharged as ink droplets from an ink discharge hole.

  In such an ink jet recording type recording apparatus, when ink is ejected, a part of the ink remains around the ink ejection hole, or once the ejected ink becomes a mist and near the ink ejection hole. It sometimes adhered. If ink adheres to the periphery of the ink ejection holes, the direction and speed of the ejected ink change due to the effect of the adhering ink, the position of the ink landing point changes, and the recording quality of the ink may deteriorate. there were.

In order to remove the adhered ink, it is known to perform wiping with a resin wiper. Further, it is known that a water-repellent film is formed around the ink discharge holes to make it difficult for ink to adhere (see, for example, Patent Document 1).
JP 2006-2057151 A

  However, although the liquid discharge head described in Patent Document 1 can remove the liquid, printing has to be stopped in order to operate the wiper, and the operation rate of the recording apparatus is deteriorated.

  In addition, although the liquid can be removed at the initial stage in the wiping, a force is frequently applied around the liquid discharge hole when wiping, so the water-repellent film around the liquid discharge hole gradually deteriorates as the wiping is repeated, There is also a problem that the frequency of the liquid adhering to the periphery of the liquid ejection hole is increased, and the frequency of wiping must be increased to cope with the frequency.

  Accordingly, an object of the present invention is to provide a liquid ejection apparatus capable of removing the liquid around the liquid ejection hole without applying a force around the liquid ejection hole.

  The liquid ejection device of the present invention includes a plurality of liquid flow paths and a flow having a plurality of liquid discharge holes formed on the surface of the liquid discharge holes, each of which communicates with the plurality of liquid flow paths via a plurality of liquid pressurization chambers. A liquid discharge apparatus comprising a passage member and a liquid pressurization device that pressurizes the liquid in the liquid pressurization chamber, wherein the flow path member is provided on the surface of the liquid discharge hole in the vicinity of the liquid discharge hole. A plurality of atmospheric suction holes, and suction devices communicating with the plurality of atmospheric suction holes through a plurality of atmospheric flow paths, respectively. It is characterized by sucking air.

  Moreover, it is preferable that a part of the liquid channel and a part of the atmospheric channel are opposed to each other with a diaphragm.

  Moreover, it is preferable that the said liquid discharge hole and the said air suction hole provided in the vicinity thereof are formed in the hollow part formed in the said liquid discharge hole surface.

  According to the liquid ejection device of the present invention, the plurality of liquid flow paths and the plurality of liquid ejection holes formed on the surface of the liquid ejection holes respectively connected to the plurality of liquid flow paths via the plurality of liquid pressurization chambers are provided. And a liquid pressurization device that pressurizes the liquid in the liquid pressurization chamber, wherein the flow path member is adjacent to the liquid discharge hole on the liquid discharge hole surface. A plurality of atmospheric suction holes provided, and suction devices communicating with the plurality of atmospheric suction holes through a plurality of atmospheric flow channels, respectively. By sucking the surrounding air, the liquid adhering to the periphery of the liquid discharge hole can be removed without applying a force to the liquid discharge hole.

  In addition, when a part of the liquid flow path and a part of the atmospheric flow path are opposed to each other through a vibration plate, the liquid discharge is stably performed because the atmospheric flow path functions as a damper when discharging the liquid. be able to. In addition, since these functions are commonly performed in the atmospheric flow path, the volume required in the flow path member can be reduced, and the interval between the liquid discharge holes can be shortened.

  In addition, when the liquid discharge hole and the air suction hole provided in the vicinity thereof are formed in a recess formed on the surface of the liquid discharge hole, the liquid discharge hole can be sucked with the same flow rate of air. The liquid around can be removed efficiently.

  Hereinafter, an embodiment of a liquid ejection apparatus of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a top view of a liquid discharge head used in the liquid discharge apparatus according to the present embodiment.

  The liquid discharge head 13 includes a flow path member 4 and a piezoelectric actuator 21 that is a liquid pressurizing device stacked on the flow path member 4. The piezoelectric actuator 21 has a trapezoidal shape, and is disposed on the upper surface of the flow path member 4 so that a pair of parallel opposing sides of the trapezoid is parallel to the longitudinal direction of the flow path member 4. In addition, two piezoelectric actuators 21 are arranged along each of two straight lines parallel to the longitudinal direction of the flow path member 4, that is, a total of four piezoelectric actuators 21 are arranged on the flow path member 4 as a whole. . The oblique sides of the piezoelectric actuators 21 adjacent on the flow path member 4 partially overlap in the width direction of the flow path member 4.

  A liquid channel 5 is formed inside the channel member 4. An opening 5 b of the liquid channel 5 is formed on the upper surface of the channel member 4. A total of ten openings 5 b of the liquid channel 5 are formed along each of two straight lines parallel to the longitudinal direction of the channel member 4. The opening 5b of the liquid flow path 5 is formed at a position that avoids an area where the four piezoelectric actuators 21 are arranged. The liquid channel 5 is supplied with liquid from a liquid tank (not shown) through the opening 5b.

  An air flow path 8 is formed inside the flow path member 4. An opening 8 b of the atmospheric flow path 8 is formed on the upper surface of the flow path member 4. A total of four openings 8 b in the atmospheric flow path are formed on the short side of each piezoelectric actuator 21. The opening 8 of the atmospheric flow path is formed at a position that avoids the area where the four piezoelectric actuators 21 are arranged. The air flow path 8 communicates with a suction device (not shown) through the opening 8b. By operating the suction device, air around an air suction hole 8a described later can be sucked through the air flow path 8. Yes.

  FIG. 2A is a partial vertical cross-sectional view of the liquid discharge head 13 used in the liquid discharge apparatus according to the present embodiment shown in FIG. A plurality of liquid discharge holes 1 are arranged in a matrix (that is, two-dimensionally and regularly) in the flow path member 4, and FIG. 2A is a sectional view around one liquid discharge hole 1. It is.

  In the flow path member 4, a plurality of liquid flow paths 5 and a plurality of liquid discharge holes 1 communicating with the plurality of liquid flow paths 5 via a plurality of liquid pressurizing chambers 6 are arranged in a matrix. The liquid pressurizing chambers 6 are also arranged in a matrix. The plurality of liquid discharge holes 1 are formed in the liquid discharge hole surface 7 which is the lower surface of the flow path member 4.

  A plurality of atmospheric suction holes 8a are formed in a matrix (that is, two-dimensionally and regularly) on the liquid discharge hole surface 7 of the flow path member 4, and are passed through the atmospheric flow path 8 and the opening 8b of the atmospheric flow path. Connected to a suction device (not shown). The air suction hole 8 a is provided in the vicinity of the liquid discharge hole 1.

The piezoelectric actuator 21 is configured by laminating a piezoelectric ceramic layer 21a, a common electrode 23a, a piezoelectric ceramic layer 21b, and a drive electrode 23b in this order from the flow path member 4 side. The piezoelectric actuators 21 are stacked so as to cover the plurality of liquid pressurizing chambers 6, and the drive electrodes 23 b are provided so as to be positioned immediately above the respective liquid pressurizing chambers 6. The drive electrode 23b can be provided at 100 pieces / cm ² or more. A connection electrode 23c is connected to each drive electrode 23b. The connection electrode 23c is formed up to a portion where the liquid pressurizing chamber 6 or the like is not formed in the channel member 4 immediately below, and is electrically connected to an external circuit (not shown). Connected to.

  The displacement element 25 is composed of the piezoelectric ceramic layer 21a, the common electrode 23a, the piezoelectric ceramic layer 21b, and the drive electrode 23b. When a drive voltage is applied to the connection electrode 23c from an external circuit, the displacement element 25 is displaced and liquid pressurization is performed. The volume of the chamber 6 changes, and the liquid in the liquid pressurizing chamber 6 is discharged from the liquid discharge hole 1. At this time, the piezoelectric ceramic layer 21a functions as a diaphragm.

  The reduced amount of liquid discharged from the liquid discharge hole 1 is supplied from a liquid tank (not shown) to the liquid pressurizing chamber 6 through the liquid flow path opening 5 b and the liquid flow path 5.

  Here, when the liquid is repeatedly ejected, a part of the liquid remains around the liquid ejection hole 1 or a part of the ejected liquid once becomes mist and adheres to the vicinity of the liquid ejection hole 1. In some cases, the direction and speed of the ejected liquid change due to the influence of the adhered liquid, and the position of the liquid landing point may change. In such a case, by operating the suction device and sucking the atmosphere (air) from the atmosphere suction hole 8a, the liquid adhering to the periphery of the liquid discharge hole 1 can be removed and a normal discharge state can be obtained. Atmospheric suction may be performed regularly so as not to be affected by the influence of the attached liquid, or may be continued weakly in order to prevent mist from adhering.

  By turning on and off the suction by an external control device, when the liquid is ejected, the suction of the atmosphere is stopped, and fluctuations in the liquid ejection direction and speed can be suppressed. Further, the removal of the liquid by suction does not involve a large mechanical operation such as the movement of the wiper, so it can be performed in an extremely short time, and the non-operation time of the liquid ejection device can be shortened.

  In order to effectively suck the liquid adhering to the periphery of the liquid discharge holes 1, it is preferable to provide the atmospheric suction holes 8 a near the liquid discharge holes 1, and the ends of the liquid discharge holes 1 and the atmospheric suction holes 8 a are preferable. The distance from the end of the hole is preferably 300 μm or less.

  The sucked liquid is sucked out of the liquid channel 4 through the atmospheric channel 8. The atmospheric flow path 8 provided in the flow path member 4 below one piezoelectric actuator 21 gathers in the flow path member 4 and is connected to the opening 8b of the atmospheric flow path provided near each piezoelectric actuator 21. Yes. By providing the opening 8b of the atmospheric flow path for each piezoelectric actuator 21, the variation in the suction flow rate of each atmospheric suction hole 8a can be reduced. The sucked liquid may be collected by a trap provided between the suction device and the flow path member 4.

  The matrix arrangement of the liquid pressurizing chambers 6 may be two-dimensional and regular such as a staggered arrangement in addition to the lattice arrangement. The staggered arrangement is preferable for reducing crosstalk because the distance between the liquid pressurizing chambers 6 can be increased.

  Next, another embodiment of the liquid ejection apparatus of the present invention will be described.

  Since the overall configuration of the liquid ejection apparatus is the same as that shown in FIG. 1, the configuration around the liquid ejection port 101 will be described with reference to a partial longitudinal sectional view of the liquid ejection head shown in FIG.

  In the flow path member 104, a plurality of liquid flow paths 105 and a plurality of liquid discharge holes 101 communicating with the plurality of liquid flow paths 105 via a plurality of liquid pressurizing chambers 106 are arranged in a matrix. The plurality of liquid discharge holes 101 are formed in the liquid discharge hole surface 107 which is the lower surface of the flow path member 104.

  A plurality of atmospheric suction holes 108a are formed in a matrix shape (that is, two-dimensionally and regularly) on the liquid discharge hole surface 107 of the flow path member 104, and the suction device is opened through the opening of the atmospheric flow path 108 and the atmospheric flow path. (Not shown).

  A part of the liquid flow path 105 and a part of the atmospheric flow path 108 face each other with the vibration plate 109 interposed therebetween.

The piezoelectric actuator 121 is configured by laminating a piezoelectric ceramic layer 121a, a common electrode 123a, a piezoelectric ceramic layer 121b, and a drive electrode 123b in this order from the flow path member 104 side. The piezoelectric actuators 121 are stacked so as to cover the plurality of liquid pressurizing chambers 106, and the drive electrodes 123b are provided so as to be positioned immediately above the respective liquid pressurizing chambers 106. The drive electrode 123b can be provided at 100 pieces / cm ² or more. A connection electrode 123c is connected to each drive electrode 123b, and the connection electrode 123c is formed up to a portion where the liquid pressurizing chamber 106 or the like is not formed in the channel member 104 immediately below, and is electrically connected to an external circuit (not shown). Connected to.

  The displacement element 125 is constituted by the piezoelectric ceramic layer 121a, the common electrode 123a, the piezoelectric ceramic layer 121b, and the drive electrode 123b. When a drive voltage is applied to the connection electrode 123c from an external circuit, the displacement element 125 is displaced and liquid pressurization is performed. The volume of the chamber 106 changes, and the liquid in the liquid pressurizing chamber 106 is discharged from the liquid discharge hole 101. At this time, the piezoelectric ceramic layer 121a functions as a diaphragm.

  When discharging a large amount of liquid from the liquid discharge hole 101, if the flow path resistance of the liquid flow path 104 is large, the supply of the liquid may not be in time and the liquid may not be discharged. By using a part of the diaphragm 109, when the liquid supply is temporarily not in time, the diaphragm 109 is deformed and the volume of the liquid flow path 105 is reduced so that the liquid can be discharged. Become.

  By making the vibration plate 109 a resin or metal thin plate, the deformation can be increased.

  In order to increase the amount of deformation of the diaphragm 109, it is preferable that the gap on the opposite side of the diaphragm 109 from the liquid flow path 105 communicates with the atmosphere. In some cases, mist entering from the atmosphere accumulates and obstructs deformation of the diaphragm 109.

  According to the liquid ejection apparatus of the present invention, the atmospheric flow path 108 functions in common for both the atmospheric suction and the damper, so that the volume required for the structure provided in the flow path member 104 can be reduced, and the liquid ejection The interval between the holes 101 can be shortened. In addition, since the liquid in the atmospheric flow path 108 can be removed by operating the suction device, even if the atmospheric flow path 108 is connected to the atmosphere, the deformation of the diaphragm 109 is inhibited by the mist of the liquid. Can be suppressed.

  Next, another embodiment of the liquid ejection apparatus of the present invention will be described.

  Since the overall configuration of the liquid ejection apparatus is the same as that shown in FIG. 1, the configuration around the liquid ejection port 201 will be described with reference to a partial longitudinal sectional view of the liquid ejection head shown in FIG.

  In the flow path member 204, a plurality of liquid flow paths 205 and a plurality of liquid discharge holes 201 communicating with the plurality of liquid flow paths 205 via a plurality of liquid pressurizing chambers 206 are arranged in a matrix. The plurality of liquid discharge holes 201 are formed in the liquid discharge hole surface 207 which is the lower surface of the flow path member 204. Here, it is a continuous surface from the lower surface of the flow path member 204.

  A plurality of atmospheric suction holes 208a are formed in a matrix (that is, two-dimensionally and regularly) on the liquid discharge hole surface 207 of the flow path member 204, and the suction device is provided through the atmospheric flow path 208 and the opening of the atmospheric flow path. (Not shown).

  The liquid discharge hole 201 and the atmospheric suction hole 208 are a recess 211 formed in the liquid discharge hole surface 207, specifically, a plate inside the flow path member among the plates 204a to 204k constituting the flow path member 204. 204a. Further, a portion immediately below the air suction hole 208 is covered with a plate 204 l constituting the flow path member 204. The liquid droplets ejected from the liquid ejection holes 201 fly without contacting the wall surfaces of the plates 204k and 204l.

  In other words, the liquid discharge hole 201 is formed in the atmospheric flow path extended from the basic atmospheric flow path 208.

  A part of the liquid flow path 205 and a part of the atmospheric flow path 208 are opposed to each other through the vibration plate 209.

The piezoelectric actuator 221 is configured by stacking a piezoelectric ceramic layer 221a, a common electrode 223a, a piezoelectric ceramic layer 221b, and a drive electrode 223b in this order from the flow path member 204 side. The piezoelectric actuators 221 are stacked so as to cover the plurality of liquid pressurizing chambers 206, and the drive electrodes 223 b are provided so as to be positioned immediately above the respective liquid pressurizing chambers 206. The driving electrode 223b can be provided at 100 / cm ² or more. A connection electrode 223c is connected to each drive electrode 223b, and the connection electrode 223c is formed up to a portion where the liquid pressurizing chamber 206 or the like is not formed in the channel member 204 immediately below, and is electrically connected to an external circuit (not shown). Connected to.

  A displacement element 225 is constituted by the piezoelectric ceramic layer 221a, the common electrode 223a, the piezoelectric ceramic layer 221b, and the drive electrode 223b. When a drive voltage is applied to the connection electrode 223c from an external circuit, the displacement element 225 is displaced and liquid pressurization is performed. The volume of the chamber 206 changes, and the liquid in the liquid pressurizing chamber 206 is discharged from the liquid discharge hole 201. At this time, the piezoelectric ceramic layer 221a functions as a diaphragm.

  Since the liquid discharge hole 201 and the atmospheric suction hole 208 are formed in the recess formed in the liquid discharge hole surface 207, the liquid adhering to the periphery of the liquid discharge hole 201 can be efficiently sucked. Further, immediately below the atmospheric suction hole 208 is covered with a plate 204l, and the opening of the plate 204l is only around the trajectory of the liquid droplets ejected from the liquid ejection hole 201. The air flowing in the vicinity of the surface of the liquid discharge hole 201 can efficiently suck the liquid adhering to the periphery of the liquid discharge hole 201.

  The liquid ejecting apparatus in which the liquid pressurizing apparatus is a piezoelectric system has been described above, but the liquid pressurizing apparatus may be of another system such as a thermal head system.

  Next, the manufacturing method of the liquid discharge apparatus of the present invention will be described by taking the liquid discharge head shown in FIGS. 1 and 2A as an example. The liquid discharge head shown in FIGS. 2B and 2C can be manufactured in the same manner.

  By a general tape forming method such as a roll coater method or a slit coater method, a tape made of a piezoelectric ceramic and an organic composition is formed to produce a plurality of green sheets. An electrode paste to be the common electrode 23a is formed on a part of the green sheet by a printing method or the like. Further, if necessary, a via hole is formed in a part of the green sheet, and a via conductor is inserted into the via hole.

  Next, each green sheet is laminated to produce a laminate, and pressure adhesion is performed. After firing the pressure-bonded laminate in a high-concentration oxygen atmosphere, the drive electrode 23b is printed on the surface of the fired body using an organic gold paste and fired, and then the land 23c is printed using an Ag paste. Bake.

  Next, the flow path member 4 is obtained by a rolling method or the like, and the liquid discharge holes 1, the liquid pressurizing chamber 6, the liquid flow path 5 and the atmospheric flow path 8 are processed into predetermined shapes by etching into the plates 4a to 4i. Provided. The flow path member 4 is preferably formed of at least one selected from the group consisting of Fe—Cr, Fe—Ni, and WC—TiC, and particularly when ink is used as a liquid. Since it is desired to be made of a material having excellent corrosion resistance, an Fe-Cr system is more preferable.

  The piezoelectric actuator 21 and the flow path member 4 can be laminated and bonded via an adhesive layer, for example. A well-known adhesive layer can be used as the adhesive layer. However, in order not to affect the piezoelectric actuator 21 and the flow path member 4, an epoxy resin, a phenol resin, or a polyphenylene ether having a thermosetting temperature of 100 to 150 ° C. It is preferable to use at least one thermosetting resin adhesive selected from the group of resins. By heating to the thermosetting temperature using such an adhesive layer, the piezoelectric actuator 21 and the flow path member 4 can be heat-bonded, whereby the liquid discharge head 13 can be obtained. Furthermore, the liquid discharge device of the present invention can be manufactured by connecting a suction device to the opening 8b of the atmospheric flow path.

  As mentioned above, although one Embodiment of this invention was shown, it cannot be overemphasized that this invention can be applied not only to the embodiment mentioned above but what was changed and improved in the range which does not deviate from the summary of this invention.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited only to a following example.

The liquid discharge head shown in FIG. 1 and FIG. That is, a PbZrTiO ₃ system powder having an average particle size of 0.5 μm is mixed with a binder and an organic solvent to prepare a slurry of a piezoelectric material, and then a green having a thickness of 30 μm is formed by a roll coater method using the obtained slurry. A sheet was produced.

  On the other hand, Ag—Pd powder was blended so that the mixing ratio was Ag: Pd = 7: 3, and a predetermined amount of an organic binder and a solvent was mixed to prepare a conductive paste.

  Next, a green sheet coated with the conductive paste and a green sheet not coated with the electrode paste are laminated, heat is applied to form a mother laminate, and the mother laminate is cut to obtain a laminate. And was fired by holding at 1000 ° C. for 2 hours in an oxygen atmosphere to form a piezoelectric actuator body.

  Next, a metal paste containing Au as a main component was screen-printed on one surface of the piezoelectric actuator body and baked at 750 ° C. to form a drive electrode portion.

  Further, a metal paste containing Ag as a main component was screen-printed and baked at 600 ° C. to form a connection electrode electrically connected to an external circuit, and the piezoelectric actuator 21 was completed.

  Next, a Fe—Cr alloy is formed into a plate shape by a rolling method, and a liquid discharge hole 1, a liquid pressurizing chamber 6, a liquid flow path 5 and an atmospheric flow path 8 are formed by etching to form the plates 4 a to 4 i. Produced. These were joined with an epoxy resin to produce the flow path member 4, and the piezoelectric actuator 21 was further joined with an epoxy adhesive to obtain the liquid discharge head 13 shown in FIG. Further, a suction device was connected to this to obtain a liquid ejection device.

  Similarly, the liquid discharge head shown in FIGS. 2B and 2C was manufactured, and a suction device was connected to the liquid discharge head to obtain a liquid discharge device.

  These liquid ejection devices can remove the liquid around the liquid ejection holes by operating the suction device, and can eject liquid droplets from the liquid ejection holes at a stable speed and direction even when liquid ejection is repeated. It was. Further, in the liquid discharge apparatus using the liquid discharge head shown in FIG. 2B and FIG. 2C, the liquid discharge is not interrupted even when a more sudden liquid discharge operation is performed. . Furthermore, in the liquid ejection apparatus using the liquid ejection head shown in FIG. 2C, the liquid around the liquid ejection holes can be stably removed even with a smaller amount of suction in the atmosphere.

FIG. 3 is a top view showing a liquid discharge head used in the liquid discharge apparatus according to one embodiment of the present invention. FIG. 2A is a partial vertical step view of the liquid ejection head illustrated in FIG. 1. FIG. 4B is a partial vertical step view of a liquid discharge head used in a liquid discharge apparatus according to another embodiment of the present invention. (C) is a partial longitudinal view of a liquid discharge head used in a liquid discharge apparatus according to another embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 101, 201 ... Liquid discharge hole 4, 104, 204 ... Flow path member 4a-4i, 104a-104j, 204-204k ... Plate 5, 105, 205 ... Liquid flow path 5b. ..Opening of liquid flow path 6, 106, 206 ... Liquid pressurizing chamber 7, 107, 207 ... Liquid discharge hole surface 8, 108, 208 ... Air flow path 8a, 108a, 208a ... Atmospheric suction hole 8b ... Opening of atmospheric flow path 109, 209 ... Diaphragm 211 ... Recessed portion 13, 113, 213 ... Liquid discharge head 21, 121, 221 ... Piezo actuator 21a, 121a 221a: Piezoelectric ceramic layer (diaphragm)
21b, 121b, 221b ... Piezoelectric ceramic layers 23a, 123a, 223a ... Common electrodes 23b, 123b, 223b ... Drive electrodes 23c, 123c, 223c ... Connection electrodes 25, 125, 225 ... Displacement element

Claims (3)

A plurality of liquid flow paths and flow path members each having a plurality of liquid discharge holes formed in a liquid discharge hole surface, which are in communication with the plurality of liquid flow paths via a plurality of liquid pressurization chambers; A liquid ejecting apparatus comprising a liquid pressurizing apparatus for pressurizing a liquid in a room, wherein the flow path member includes a plurality of atmospheric suction holes provided on the surface of the liquid ejecting hole in the vicinity of the liquid ejecting hole; A suction device communicating with the plurality of atmospheric suction holes through a plurality of atmospheric flow paths, respectively, and the suction device sucks the atmosphere around the plurality of atmospheric suction holes. Liquid ejecting device. The liquid ejection apparatus according to claim 1, wherein a part of the liquid flow path and a part of the atmospheric flow path are opposed to each other via a vibration plate. 3. The liquid ejection device according to claim 1, wherein the liquid ejection hole and the atmospheric suction hole provided adjacent to the liquid ejection hole are formed in a recess formed in the surface of the liquid ejection hole.

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