JP2019005734A - Liquid discharge device and liquid discharge method - Google Patents

Abstract

To provide a technology of adjusting a discharge amount of a liquid during discharge operation.SOLUTION: A liquid discharge device includes: a nozzle for discharging a liquid; a liquid chamber having a nozzle communication hole communicating with the nozzle; an inflow passage which makes the liquid flow in the liquid chamber; a moving body which discharges the liquid from the nozzle by reciprocating toward the nozzle in the liquid chamber; an actuator which reciprocates the moving body; and a control part which controls the actuator and discharges the liquid from the nozzle by contacting a periphery of the nozzle communication hole with the moving body. The control part adjusts a liquid amount discharged from the nozzle by adjusting the liquid amount flowing from the inflow passage to the liquid chamber in a state that the periphery of the nozzle communication hole and the moving body are not in contact with each other.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a liquid ejection apparatus and a liquid ejection method.

  Conventionally, for example, a liquid ejection device described in Patent Document 1 includes a nozzle that ejects liquid droplets, a liquid chamber that communicates with the nozzle, a through-hole that communicates with the liquid chamber, and a plunger that is inserted through the through-hole. Prepare. In this liquid ejecting apparatus, the liquid is ejected from the nozzle by the inertia force by moving the plunger toward the nozzle while the liquid is supplied into the liquid chamber.

JP 2013-208613 A

  In the liquid ejecting apparatus of Patent Document 1, the amount of backward movement of the plunger after droplet ejection is regulated by a fixed stopper, and it is considered that the amount of ejected droplet is adjusted during the ejection operation. There wasn't. Therefore, there has been a demand for a technique capable of adjusting the liquid discharge amount during the discharge operation in the liquid discharge apparatus.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.

(1) According to one aspect of the present invention, a liquid ejection apparatus is provided. The liquid ejection apparatus includes a nozzle for ejecting liquid, a liquid chamber having a nozzle communication hole communicating with the nozzle, an inflow path through which the liquid flows into the liquid chamber, and the liquid chamber toward the nozzle. A moving body that discharges the liquid from the nozzle by reciprocating the nozzle, an actuator that reciprocates the moving body, and controlling the actuator to bring the periphery of the nozzle communication hole into contact with the moving body. And a controller that discharges the liquid from the nozzle, and the controller flows into the liquid chamber from the inflow path in a state where the periphery of the nozzle communication hole and the moving body are not in contact with each other. The amount of the liquid ejected from the nozzle is adjusted by adjusting the amount of the liquid. With such a liquid ejection device, the liquid ejection amount can be adjusted during the ejection operation.

(2) In the liquid ejection apparatus according to the above aspect, the control unit adjusts the pressure of the liquid flowing into the liquid chamber so that the periphery of the nozzle communication hole is not in contact with the moving body. The amount of the liquid flowing into the liquid chamber from the inflow path may be adjusted. With such a liquid discharge device, the liquid discharge amount can be adjusted during the discharge operation by adjusting the pressure of the liquid flowing into the liquid chamber.

(3) In the liquid ejection device according to the above aspect, the control unit adjusts a time during which the periphery of the nozzle communication hole and the moving body are not in contact with each other to thereby flow into the liquid chamber from the inflow path. The amount of liquid may be adjusted. In the case of such a liquid ejection apparatus, the liquid ejection amount can be adjusted during the ejection operation by adjusting the time during which the periphery of the nozzle communication hole is not in contact with the moving body.

(4) According to another aspect of the invention, a liquid ejection device is provided. The liquid ejection apparatus includes a nozzle for ejecting liquid, a liquid chamber having a nozzle communication hole communicating with the nozzle, an inflow path through which the liquid flows into the liquid chamber, and the liquid chamber toward the nozzle. A moving body that discharges the liquid from the nozzle by reciprocating the nozzle, an actuator that reciprocates the moving body, and controlling the actuator to bring the periphery of the nozzle communication hole into contact with the moving body. And a controller that discharges the liquid from the nozzle, and the controller controls the amount of gas flowing from the nozzle into the liquid chamber as the movable body is pulled up from the periphery of the nozzle communication hole. By adjusting, the amount of the liquid discharged from the nozzle is adjusted. With such a liquid ejection device, the liquid ejection amount can be adjusted during the ejection operation.

(5) In the liquid ejecting apparatus according to the above aspect, the control unit adjusts a distance that the moving body separates from the nozzle, thereby pulling up the moving body from the periphery of the nozzle communication hole. The amount of gas flowing into the liquid chamber may be adjusted. In the case of such a liquid ejection device, the liquid ejection amount can be adjusted during the ejection operation by adjusting the distance that the moving body is separated from the nozzle.

(6) In the liquid ejection device according to the above aspect, the control unit adjusts a speed at which the moving body moves away from the nozzle, thereby pulling up the moving body from the periphery of the nozzle communication hole. The amount of gas flowing into the liquid chamber may be adjusted. In the case of such a liquid ejection apparatus, the liquid ejection amount can be adjusted during the ejection operation by adjusting the speed at which the moving body moves away from the nozzle.

(7) In the liquid ejection device according to the above aspect, the liquid ejecting apparatus includes a plurality of the nozzles, a plurality of the moving bodies corresponding to each of the nozzles, and a plurality of the actuators. The actuator may be controlled. With such a liquid ejection device, the liquid ejection amount can be adjusted for each nozzle.

  The present invention can be realized in various forms other than the form as the liquid ejection apparatus described above. For example, the present invention can be realized in the form of a liquid discharge method executed by the liquid discharge device, a computer program for controlling the liquid discharge device, a non-temporary tangible recording medium on which the computer program is recorded, and the like.

It is explanatory drawing which shows schematic structure of the liquid discharge apparatus of this invention. It is explanatory drawing which shows schematic structure of a head part. It is explanatory drawing which shows a discharge control process. It is explanatory drawing which shows the discharge control process of 3rd Embodiment. It is explanatory drawing which shows the discharge control process of 4th Embodiment. It is explanatory drawing which shows schematic structure of the head part of 5th Embodiment.

A. First embodiment:
FIG. 1 is an explanatory diagram showing a schematic configuration of a liquid ejection apparatus 100 according to the first embodiment of the present invention. The liquid ejection device 100 includes a tank 10, a pressure pump 20, an inflow path 30, a head section 40, an outflow path 50, a liquid storage section 60, a negative pressure generation source 70, a control section 80, a circulation A road 90.

  The tank 10 contains a liquid. As the liquid, for example, ink having a predetermined viscosity is accommodated. Examples of the predetermined viscosity include 50 mPa · s to 40,000 mPa · s at room temperature (25 ° C.). The liquid in the tank 10 is supplied to the head unit 40 through the inflow path 30 by the pressure pump 20. For example, the pressure pump 20 applies a pressure of 10 to 100 atmospheres to the liquid. The liquid supplied to the head unit 40 is discharged by the head unit 40. The operation of the head unit 40 is controlled by the control unit 80.

  The liquid that has not been ejected by the head unit 40 is discharged to the liquid storage unit 60 through the outflow path 50. A negative pressure generation source 70 that can be configured by various pumps is connected to the liquid reservoir 60. The negative pressure generation source 70 sucks liquid from the head unit 40 through the outflow path 50 by setting the inside of the liquid storage unit 60 to a negative pressure. The pressurizing pump 20 and the negative pressure generating source 70 have a function of generating a differential pressure between the inflow path 30 and the outflow path 50 to supply the liquid to the inflow path 30, and are constant in the liquid flowing into the head unit 40. It also has a function of adjusting the pressure of the liquid in the liquid chamber 42 (FIG. 2) by applying pressure. Note that either the pressurizing pump 20 or the negative pressure generating source 70 may be omitted, and the pressure of the liquid in the liquid chamber 42 may be adjusted by either the pressurizing pump 20 or the negative pressure generating source 70 alone. . As described above, in the present embodiment, since the liquid that has not been ejected from the head unit 40 is discharged from the head unit 40 to the outflow path 50, the sedimentation component in the liquid is prevented from accumulating in the head unit 40. be able to.

  In the present embodiment, the liquid storage unit 60 and the tank 10 are connected by a circulation path 90. The liquid stored in the liquid storage unit 60 is returned to the tank 10 through the circulation path 90 and supplied again to the head unit 40 by the pressurizing pump 20. The circulation path 90 may be provided with a pump for sucking liquid from the liquid reservoir 60. The circulation path 90 may be omitted, and the liquid ejection device 100 may be configured not to circulate the liquid.

  FIG. 2 is an explanatory diagram showing a schematic configuration of the head unit 40. The lower part of FIG. 2 is assumed to be downward in the direction of gravity. The head unit 40 includes a nozzle 41, a liquid chamber 42, an actuator 43, a seal member 48, and a moving body 49.

  The liquid chamber 42 is a room to which liquid is supplied. The liquid chamber 42 has a nozzle communication hole 44 that communicates with a nozzle 41 for discharging liquid to the outside. The liquid chamber 42 is connected to an inflow path 30 that is a flow path for allowing the liquid to flow into the liquid chamber 42 and an outflow path 50 that is a flow path for allowing the liquid to flow out of the liquid chamber 42. In the present embodiment, the nozzle 41 is a cylindrical space, and the liquid chamber 42 is a substantially cylindrical space. The lower end portion of the liquid chamber 42 has a tapered shape in which the cross-sectional area decreases as it goes downward. In the present embodiment, the nozzle 41 and the liquid chamber 42 are configured by forming a space in the metal material.

  A moving body 49 that discharges liquid from the nozzle 41 by reciprocating toward the nozzle 41 is provided in the liquid chamber 42. In the present embodiment, the moving body 49 is a substantially columnar metal member, and its tip is formed in a substantially hemispherical shape. An annular seal member 48 for suppressing liquid from leaking from the liquid chamber 42 is disposed around the moving body 49 at the upper end portion of the liquid chamber 42.

  An actuator 43 that reciprocates the moving body 49 is connected to the upper end of the moving body 49. In the present embodiment, a piezoelectric element is used as the actuator 43. The piezoelectric element has a configuration in which a plurality of piezoelectric materials are stacked, and the length in the stacking direction changes when a voltage is applied to each piezoelectric material. In the state where the piezo element is elongated and becomes the longest, the moving body 49 moves downward, the tip of the moving body 49 comes into contact with a part of the liquid chamber 42 around the nozzle communication hole 44, and the nozzle 41. Occlude. On the other hand, in a state where the piezo element is not extended, the moving body 49 moves upward, and the tip portion of the moving body 49 is separated from the periphery of the nozzle communication hole 44. When the moving body 49 moves upward, the liquid in the liquid chamber 42 flows into the nozzle 41. In the present embodiment, the distance that the moving body 49 moves, that is, the length that the actuator 43 extends is, for example, 50 to 100 μm.

  The control unit 80 (FIG. 1) is configured as a computer having a CPU and a memory, and implements various processes by executing a control program stored in the memory. For example, the control unit 80 controls the actuator 43 to realize a discharge control process for discharging the liquid from the nozzle 41 by bringing the moving body 49 into contact with the periphery of the nozzle communication hole 44. The control program may be recorded on various tangible recording media that are not temporary.

  FIG. 3 is an explanatory diagram showing the discharge control process. FIG. 3 shows an ejection control process when ejecting one drop of liquid. For this reason, when liquid is continuously discharged, the discharge control process is continuously repeated while adjusting the discharge amount of each drop by the control unit 80. In FIG. 3, the upper side shows a case where the discharge amount of one drop is small, and the lower side shows a case where the discharge amount of one drop is large.

  As shown in FIG. 3, first, at timing Ta <b> 0 immediately before the moving body 49 moves upward, the control unit 80 controls the actuator 43 so that the moving body 49 moves downward. For this reason, the tip of the moving body 49 comes into contact with the periphery of the nozzle communication hole 44 to block the nozzle 41. At timing Ta0, the nozzle 41 is filled with liquid.

  Next, when the control unit 80 controls the actuator 43, the moving body 49 moves upward. Therefore, the tip of the moving body 49 is not in contact with the periphery of the nozzle communication hole 44, and negative pressure corresponding to the volume that the moving body 49 is raised is generated in the nozzle 41, so that the liquid in the nozzle 41 is liquid. The chamber 42 is once pulled up. In a state where the distal end portion of the moving body 49 is not in contact with the periphery of the nozzle communication hole 44, the liquid in the inflow path 30 is brought into the liquid chamber 42 by the pressure applied to the liquid in the inflow path 30 from the pressurizing pump 20. To be supplied. Note that the timing Ta1 indicates the timing immediately after the moving body 49 has finished moving upward.

  In the present embodiment, the control unit 80 adjusts the amount of liquid flowing into the liquid chamber 42 from the inflow path 30 by adjusting the time during which the tip of the moving body 49 is not in contact with the periphery of the nozzle communication hole 44. The amount of liquid ejected from the nozzle 41 is adjusted. Timing Ta <b> 2 when the control unit 80 starts moving the moving body 49 downward by controlling the actuator 43 when the discharge amount of one drop of liquid discharged from the nozzle 41 is small and when the discharge amount of one drop is large. Is different.

  As shown in the upper side of the drawing of FIG. 3, when reducing the discharge amount of one drop, the control unit 80 shortens the time from timing Ta0 to timing Ta2. By doing so, the time from the timing Ta0 to the timing Ta3 when the moving body 49 contacts the periphery of the nozzle communication hole 44, that is, the tip of the moving body 49 is not in contact with the periphery of the nozzle communication hole 44. Time is shortened. As a result, the amount of liquid flowing into the liquid chamber 42 from the inflow path 30 is reduced, and the amount of liquid discharged from the nozzle 41 is reduced.

  On the other hand, as shown in the lower side of the drawing in FIG. 3, when increasing the discharge amount of one drop, the control unit 80 shortens the time from the timing Ta0 to the timing Ta2 compared to reducing the discharge amount of one drop. By doing so, the time during which the tip of the moving body 49 is not in contact with the periphery of the nozzle communication hole 44 becomes longer. As a result, the amount of liquid flowing into the liquid chamber 42 from the inflow path 30 increases, and the amount of liquid discharged from the nozzle 41 increases.

  As described above, according to the liquid ejection device 100 of the present embodiment, the amount of liquid flowing into the liquid chamber 42 from the inflow path 30 in a state where the periphery of the nozzle communication hole 44 and the moving body 49 are not in contact with each other. By adjusting, the amount of liquid ejected from the nozzle 41 can be adjusted. For this reason, the liquid discharge amount can be adjusted during the discharge operation in the liquid discharge apparatus 100. As a result, according to the liquid ejection device 100, it is possible to change the ejection amount in stages, finely adjust each ejection amount, and adjust the ejection amount of each droplet during the ejection operation. Become.

B. Second embodiment:
The second embodiment differs from the first embodiment in a method for adjusting the amount of liquid flowing from the inflow path 30 into the liquid chamber 42. In the second embodiment, the control unit 80 adjusts the amount of liquid flowing into the liquid chamber 42 from the inflow path 30 by adjusting the pressure of the liquid flowing into the liquid chamber 42.

  In the second embodiment, as shown in the upper side of the drawing of FIG. 3, when the discharge amount of one drop is reduced, the control unit 80 causes the state from timing Ta0 to timing Ta3, that is, the tip of the moving body 49 to communicate with the nozzle. In a state where it is not in contact with the periphery of the hole 44, the pressure of the liquid flowing into the liquid chamber 42 is reduced. Specifically, the control unit 80 controls the pressurizing pump 20 to reduce the pressure of the liquid flowing into the liquid chamber 42. As a result, the amount of liquid flowing into the liquid chamber 42 from the inflow path 30 is reduced, and the amount of liquid discharged from the nozzle 41 is reduced.

  On the other hand, as shown in the lower side of the drawing in FIG. 3, when increasing the discharge amount of one drop, the control unit 80 discharges one drop in a state where the tip of the moving body 49 is not in contact with the periphery of the nozzle communication hole 44. The pressure of the liquid flowing into the liquid chamber 42 is increased as compared with the case where the amount is decreased. Specifically, the control unit 80 increases the pressure of the liquid flowing into the liquid chamber 42 by controlling the pressurizing pump 20. As a result, the amount of liquid flowing into the liquid chamber 42 from the inflow path 30 increases, and the amount of liquid discharged from the nozzle 41 increases.

  As described above, according to the second embodiment, the liquid discharge amount can be adjusted during the discharge operation by adjusting the pressure of the liquid flowing into the liquid chamber 42.

C. Third embodiment:
The third embodiment differs from the first embodiment in a method for adjusting the amount of liquid ejected from the nozzle 41. Here, in the first embodiment and the second embodiment, the control unit 80 adjusts the amount of liquid discharged from the nozzle 41 by adjusting the amount of liquid flowing into the liquid chamber 42 from the inflow path 30. ing. On the other hand, in the third embodiment and the fourth embodiment to be described later, the control unit 80 reduces the amount of gas flowing into the liquid chamber 42 from the nozzle 41 as the moving body 49 is pulled up from the periphery of the nozzle communication hole 44. By adjusting, the amount of liquid discharged from the nozzle 41 is adjusted.

  In the third embodiment, the control unit 80 adjusts the amount of gas flowing into the liquid chamber 42 by controlling the actuator 43 to adjust the distance that the moving body 49 moves away from the nozzle 41.

  FIG. 4 is an explanatory diagram illustrating a discharge control process according to the third embodiment. As shown in the upper side of the drawing of FIG. 4, when reducing the ejection amount of one drop, the control unit 80 controls the actuator 43 to increase the distance that the moving body 49 moves away from the nozzle 41 at the timing Ta1. As a result, the amount of gas flowing into the liquid chamber 42 increases. As a result, since the amount of gas flowing into the liquid chamber 42 is increased at the timing Ta2 at which the moving body 49 starts to move downward, the discharge amount of the liquid discharged from the nozzle 41 at the timing Ta3. Get smaller.

  On the other hand, as shown in the lower side of the drawing in FIG. 4, when increasing the discharge amount of one drop, the control unit 80 causes the moving body 49 to move away from the nozzle 41 at the timing Ta <b> 1 as compared to reducing the discharge amount of one drop. Reduce the distance. Thereby, the amount of gas flowing into the liquid chamber 42 is reduced. As a result, since the amount of gas flowing into the liquid chamber 42 is reduced at the timing Ta2, the discharge amount of the liquid discharged from the nozzle 41 is increased at the timing Ta3.

  As described above, according to the third embodiment, the nozzle 41 is adjusted by adjusting the amount of gas flowing into the liquid chamber 42 from the nozzle 41 as the moving body 49 is pulled up from the periphery of the nozzle communication hole 44. The amount of liquid discharged from the liquid is adjusted. For this reason, the liquid discharge amount can be adjusted during the discharge operation in the liquid discharge apparatus 100.

D. Fourth embodiment:
The fourth embodiment differs from the third embodiment in a method of adjusting the amount of gas flowing from the nozzle 41 into the liquid chamber 42 as the moving body 49 is pulled up from the periphery of the nozzle communication hole 44. . In the fourth embodiment, the control unit 80 adjusts the amount of gas flowing into the liquid chamber 42 by adjusting the speed at which the moving body 49 moves away from the nozzle 41.

  FIG. 5 is an explanatory diagram illustrating a discharge control process according to the fourth embodiment. As shown on the upper side of the drawing of FIG. 5, when the discharge amount of one drop is reduced, the control unit 80 increases the speed at which the moving body 49 moves away from the nozzle 41. That is, the time from the timing Ta0 immediately before the moving body 49 moves upward to the timing Ta1 immediately after the moving body 49 finishes moving upward is shortened. As a result, the negative pressure generated in the nozzle 41 increases, and the amount of gas flowing into the liquid chamber 42 increases. For this reason, the gas amount flowing into the liquid chamber 42 is increased at the timing Ta2 at which the moving body 49 starts to move downward, and the discharge amount of the liquid discharged from the nozzle 41 is decreased at the timing Ta3.

  On the other hand, as shown in the lower side of the drawing of FIG. 5, when increasing the discharge amount of one drop, the control unit 80 slows the speed at which the moving body 49 moves away from the nozzle 41 than when reducing the discharge amount of one drop. . That is, the time from timing Ta0 to timing Ta1 is lengthened. Thereby, the negative pressure generated in the nozzle 41 is reduced, and the amount of gas flowing into the liquid chamber 42 is reduced. For this reason, the gas amount flowing into the liquid chamber 42 is reduced at the timing Ta2, and the discharge amount of the liquid discharged from the nozzle 41 is increased at the timing Ta3.

  As described above, according to the fourth embodiment, the moving body 49 is lifted from the periphery of the nozzle communication hole 44 by adjusting the speed at which the moving body 49 moves away from the nozzle 41, and the liquid chamber is moved from the nozzle 41 to the liquid chamber. The amount of gas flowing into 42 can be adjusted. For this reason, it is possible to adjust the amount of liquid discharged from the nozzle 41, and it is possible to adjust the amount of liquid discharged during the discharge operation in the liquid discharge apparatus 100.

E. Fifth embodiment:
FIG. 6 is an explanatory diagram showing a schematic configuration of a head unit 40A of the fifth embodiment. The fifth embodiment is different from the first embodiment in the configuration of the head portion 40A, but is otherwise the same. The fifth embodiment includes a plurality of nozzles 41a, 41b, and 41c, and a plurality of moving bodies 49a, 49b, and 49c and actuators 43a, 43b, and 43c corresponding to the respective nozzles 41a to 41c. Moreover, in 5th Embodiment, the control part 80 controls each actuator 43a-43c for every nozzle 41a-41c.

  By doing in this way, according to 5th Embodiment, the discharge amount of a liquid can be adjusted for every nozzle 41a-41c. Note that the control unit 80 may collectively control the actuators 43a to 43c. The fifth embodiment is a mode in which the liquid chambers 42a, 42b, and 42c are arranged in parallel through the flow paths 45 and 46, but is not limited thereto, and the liquid chambers 42a, 42b, and 42c are connected to the inflow path 30 and It is good also as an aspect connected with the outflow channel 50 directly.

F. Other embodiments:
<Other embodiment 1>
In the second embodiment, the pressure of the liquid is adjusted by the pressurizing pump 20, but the present invention is not limited to this, and the pressure of the liquid may be adjusted by the negative pressure generating source 70. 70 may adjust the pressure of the liquid.

<Other embodiment 2>
In the first to fourth embodiments, the amount of liquid ejected from the nozzle 41 is adjusted by different methods. However, the present invention is not limited to this, and the liquid ejected from the nozzle 41 by a method combining the above-described methods. You may adjust the amount. For example, the amount of liquid ejected from the nozzles may be adjusted by a method combining the method described in the first embodiment and the method described in the third embodiment.

<Other embodiment 3>
The present invention is not limited to a liquid ejecting apparatus that ejects ink, but can be applied to any liquid ejecting apparatus that ejects liquid other than ink. For example, the present invention is applicable to the following various liquid ejection devices.
(1) An image recording apparatus such as a facsimile apparatus.
(2) A color material discharge device used for manufacturing a color filter for an image display device such as a liquid crystal display.
(3) An electrode material discharge device used for electrode formation such as an organic EL (Electro Luminescence) display and a surface emission display (Field Emission Display, FED).
(4) A liquid ejection device that ejects a liquid containing a bio-organic material used for biochip manufacture.
(5) Sample discharge device as a precision pipette.
(6) A lubricating oil discharge device.
(7) Resin liquid discharge device.
(8) A liquid ejection device that ejects lubricating oil pinpoint to precision machines such as watches and cameras.
(9) A liquid ejection apparatus that ejects a transparent resin liquid such as an ultraviolet curable resin liquid onto a substrate in order to form a micro hemispherical lens (optical lens) used for an optical communication element or the like.
(10) A liquid discharge apparatus that discharges an acidic or alkaline etchant to etch a substrate or the like.
(11) A liquid discharge apparatus including a liquid discharge head that discharges another arbitrary minute amount of liquid droplets.

  The “droplet” refers to the state of the liquid ejected from the liquid ejecting apparatus, and includes those that are tailed in the form of particles, tears, or threads. The “liquid” here may be any material that can be consumed by the liquid ejection device. For example, the “liquid” may be a material in a state in which the substance is in a liquid phase, such as a material in a liquid state having high or low viscosity, and sol, gel water, other inorganic solvents, organic solvents, solutions, Liquid materials such as liquid resins and liquid metals (metal melts) are also included in the “liquid”. Further, “liquid” includes not only a liquid as one state of a substance but also a liquid obtained by dissolving, dispersing or mixing particles of a functional material made of a solid such as a pigment or metal particles in a solvent. Typical examples of the liquid include ink and liquid crystal. Here, the ink includes various liquid compositions such as general water-based ink and oil-based ink, gel ink, and hot-melt ink.

  The present invention is not limited to the above-described embodiment, and can be realized with various configurations without departing from the spirit of the present invention. For example, the technical features of the embodiments corresponding to the technical features in each embodiment described in the summary section of the invention are intended to solve part or all of the above-described problems, or part of the above-described effects. Or, in order to achieve the whole, it is possible to replace or combine as appropriate. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

    DESCRIPTION OF SYMBOLS 10 ... Tank, 20 ... Pressure pump, 30 ... Inflow path, 40, 40A ... Head part, 41, 41a, 41b, 41c ... Nozzle, 42, 42a, 42b, 42c ... Liquid chamber, 43, 43a, 43b, 43c ... Actuator, 44 ... Nozzle communication hole, 45 ... Flow path, 48 ... Seal member, 49, 49a, 49b, 49c ... Moving body, 50 ... Outflow path, 60 ... Liquid reservoir, 70 ... Negative pressure generating source, 80 ... Control unit, 90 ... circulation path, 100 ... liquid ejection device

Claims (8)

A liquid ejection device comprising:
A nozzle for discharging liquid;
A liquid chamber having a nozzle communication hole communicating with the nozzle;
An inflow path through which the liquid flows into the liquid chamber;
A moving body that discharges the liquid from the nozzle by reciprocating toward the nozzle in the liquid chamber;
An actuator for reciprocating the moving body;
A controller that controls the actuator to discharge the liquid from the nozzle by bringing the moving body into contact with the periphery of the nozzle communication hole; and
The controller is discharged from the nozzle by adjusting the amount of the liquid flowing into the liquid chamber from the inflow path in a state where the periphery of the nozzle communication hole and the moving body are not in contact with each other. A liquid ejection apparatus for adjusting the amount of the liquid. The liquid ejection device according to claim 1,
The controller adjusts the pressure of the liquid flowing into the liquid chamber, and flows into the liquid chamber from the inflow path in a state where the periphery of the nozzle communication hole and the moving body are not in contact with each other. A liquid ejection apparatus for adjusting the amount of the liquid. The liquid ejection device according to claim 1 or 2, wherein
The liquid ejecting apparatus, wherein the control unit adjusts an amount of the liquid flowing into the liquid chamber from the inflow path by adjusting a time during which the periphery of the nozzle communication hole is not in contact with the moving body. A liquid ejection device comprising:
A nozzle for discharging liquid;
A liquid chamber having a nozzle communication hole communicating with the nozzle;
An inflow path through which the liquid flows into the liquid chamber;
A moving body that discharges the liquid from the nozzle by reciprocating toward the nozzle in the liquid chamber;
An actuator for reciprocating the moving body;
A controller that controls the actuator to discharge the liquid from the nozzle by bringing the moving body into contact with the periphery of the nozzle communication hole; and
The control unit adjusts an amount of gas flowing from the nozzle into the liquid chamber as the moving body is pulled up from the periphery of the nozzle communication hole, thereby controlling the amount of the liquid discharged from the nozzle. The liquid ejection device to be adjusted. The liquid ejection device according to claim 4,
The control unit adjusts a distance that the moving body moves away from the nozzle, thereby adjusting an amount of gas flowing from the nozzle into the liquid chamber as the moving body is pulled up from the periphery of the nozzle communication hole. A liquid ejection device. The liquid ejection device according to claim 4 or 5, wherein
The controller adjusts an amount of gas flowing from the nozzle into the liquid chamber as the movable body is pulled up from the periphery of the nozzle communication hole by adjusting a speed at which the movable body is separated from the nozzle. A liquid ejection device. The liquid ejection device according to any one of claims 1 to 6,
A liquid ejecting apparatus having a plurality of the nozzles, a plurality of the moving bodies corresponding to each of the nozzles, and a plurality of the actuators, wherein the control unit controls the actuator for each of the nozzles. A nozzle for discharging liquid;
A liquid chamber having a nozzle communication hole communicating with the nozzle;
An inflow path through which the liquid flows into the liquid chamber;
A moving body that discharges the liquid from the nozzle by reciprocating toward the nozzle in the liquid chamber;
An actuator for reciprocating the moving body;
A liquid discharge method executed by a liquid discharge apparatus that discharges the liquid from the nozzle by controlling the actuator to bring the periphery of the nozzle communication hole into contact with the moving body,
In a state where the periphery of the nozzle communication hole and the moving body are not in contact with each other, the amount of the liquid discharged from the nozzle is adjusted by adjusting the amount of the liquid flowing into the liquid chamber from the inflow path. The liquid ejection method to be adjusted.

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