Liquid jet device

Abstract

To provide a liquid jet device configured to suction liquid jetted from a nozzle, through a suction port, which can suppress the suction port from adhering to an object due to the suction of the liquid.SOLUTION: A liquid jet device 1 comprises: a nozzle 3 that jets liquid L flowing from a nozzle hole 3a, in a jetting direction B along a first shaft AX; a liquid feeding pipe 7 through which the liquid L is fed to the nozzle 3; and a suction part 10 having a suction port 12a, which suctions the liquid L jetted from the nozzle 3, from the suction port 12a. The suction part 10 has an extended part 11 extended along the first shaft AX, and a bent part 12 joined to the extending part 11 and bent in a bending direction crossing the first shaft AX. In the bent part 12, the suction port 12a is formed at the opposite side of a side joined with the extended part 11, and the suction port 12a is positioned closer to the jetting direction B than the nozzle hole 3a, in a direction along the first shaft AX.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a liquid ejection apparatus. [Background technology]

[0002] Conventionally, various liquid injection devices have been used. Among them, there is a liquid injection device capable of sucking liquid injected from a nozzle through a suction port. For example, Patent Document 1 discloses a liquid injection device that has a suction tube concentrically arranged around a nozzle for sucking the injected liquid from above an object in order to improve the efficiency of crushing the object. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] WO2015 / 136883 publication Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a conventional liquid ejection device capable of sucking liquid ejected from a nozzle through a suction port, such as the liquid ejection device disclosed in Patent Document 1, for example, when ejecting liquid and sucking the liquid, the suction port may stick to the target object as the liquid is sucked in. When the suction port sticks to the target object, the liquid suction efficiency decreases, and the impact force of the liquid ejected from the nozzle against the target object decreases. [Means for solving the problem]

[0005] In order to solve the above problem, the liquid injection device of the present invention comprises a nozzle that ejects liquid from a nozzle hole in an injection direction along a first axis, a liquid transport pipe that transports the liquid to the nozzle, and a suction section having a suction port that sucks the liquid ejected from the nozzle through the suction port, wherein the suction section has an extension portion extending along the first axis and a bent portion that is connected to the extension portion and bent in a bending direction that intersects the first axis, and the suction port is provided on the side of the bent portion opposite to the side connected to the extension portion, and the suction port is positioned on the injection direction side of the nozzle hole in the direction along the first axis. [Brief description of the drawings]

[0006] [Figure 1] 1 is a schematic diagram illustrating a liquid ejecting apparatus according to a first embodiment. [Diagram 2] 2 is an enlarged view showing a nozzle and a suction unit of the liquid ejecting device of FIG. 1. [Diagram 3] 5 is a schematic diagram showing an example of the arrangement of a suction unit with respect to a target object. [Figure 4] FIG. 13 is a diagram for explaining a method for measuring the liquid suction efficiency. [Diagram 5] 11 is a graph showing the relationship between the angle between the bent portion and the object and the number of times the tape adheres to the object. [Figure 6] 11 is a graph showing the relationship between the angle between the bent portion and the object and the suction time. [Figure 7] FIG. 11 is a schematic diagram illustrating a liquid ejecting apparatus according to a second embodiment. [Figure 8] FIG. 11 is a schematic diagram illustrating a liquid ejecting apparatus according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] First, the present invention will be briefly described. In order to solve the above problem, a liquid injection device of a first aspect of the present invention comprises a nozzle that ejects liquid from a nozzle hole in an injection direction along a first axis, a liquid transport pipe that transports the liquid to the nozzle, and a suction section having a suction port that sucks the liquid ejected from the nozzle through the suction port, wherein the suction section has an extension portion extending along the first axis and a bent portion that is connected to the extension portion and bent in a bending direction that intersects the first axis, and the suction port is provided on the side of the bent portion opposite to the side connected to the extension portion, and the suction port is positioned on the injection direction side of the nozzle hole in the direction along the first axis.

[0008] According to this aspect, the suction unit has an extending portion extending along the first axis and a bending portion connected to the extending portion and bending in a bending direction intersecting the first axis, and the suction port of the bending portion is located on the ejection direction side of the nozzle hole in the direction along the first axis. With this configuration, it is possible to continue ejecting the liquid without the suction port facing the target object. Therefore, when the liquid is ejected onto the target object while being sucked in, it is possible to prevent the suction port from sticking to the target object as the liquid is sucked in.

[0009] A second aspect of the liquid injection device of the present invention is an aspect dependent on the first aspect, and is characterized in that the nozzle is configured to be able to eject the liquid in a continuous flow and convert the continuous flow into droplets to collide the liquid against a target object.

[0010] According to this aspect, the nozzle is configured to be capable of ejecting a liquid in a continuous stream and converting the continuous stream into droplets to collide with an object. In this manner, by ejecting a liquid in a continuous stream and converting the continuous stream into droplets to collide with an object in the form of droplets, it is possible to dramatically improve the collision force of the liquid compared to a configuration in which the liquid is simply ejected in a continuous stream and collided with the object as a continuous stream.

[0011] A third aspect of the liquid injection device of the present invention is an aspect dependent on the second aspect, and is characterized in that the distance along the first axis from the nozzle hole to the suction port is longer than the droplet formation distance until the continuous flow is formed into droplets.

[0012] According to this aspect, the distance along the first axis from the nozzle hole to the suction port is longer than the distance it takes for the continuous flow to turn into droplets. Therefore, even when the bent portion is in contact with the object, the liquid can be collided with the object in the form of droplets rather than a continuous flow. In other words, the liquid can be collided with the object with a strong impact force while the suction portion effectively sucks in the liquid around the object.

[0013] A fourth aspect of the liquid injection device of the present invention is an aspect dependent on any one of the first to third aspects, and is characterized in that the inner angle of the bending portion relative to the first axis is greater than or equal to 80° and less than 180°.

[0014] According to this aspect, the inner angle of the bent portion relative to the first axis is equal to or greater than 80° and less than 180°. In such a configuration, for example, when liquid is ejected perpendicularly (90°) to the target surface of the object against which the liquid is to be collided, the suction port is not at 90° (directly facing) the target surface, and the bending angle of the bent portion relative to the target surface is up to -10°. By making the bending angle of the bent portion relative to the target surface equal to or greater than -10° and less than 90°, the liquid on the target surface can be sucked in particularly efficiently while preventing the suction port from sticking to the target object.

[0015] A liquid ejecting device according to a fifth aspect of the present invention is an aspect dependent on any one of the first to third aspects, characterized in that the nozzle hole has a hole diameter of 10 μm or more and 120 μm or less.

[0016] According to this aspect, the nozzle hole has a diameter of 10 μm or more and 120 μm or less. With this configuration, the impact force of the liquid ejected from the nozzle against the target object can be improved.

[0017] A sixth aspect of the liquid ejection device of the present invention is an aspect dependent on any one of the first to third aspects, and is characterized in that it includes a liquid delivery section that imparts a transport force to transport the liquid to the nozzle.

[0018] According to this aspect, the liquid delivery section is provided for applying a delivery force for delivering the liquid to the nozzle. With this configuration, the liquid can be delivered to the nozzle in an optimal manner, and the delivery force applied allows the liquid to be sprayed from the nozzle with strong pressure.

[0019] A seventh aspect of the liquid injection device of the present invention is an aspect dependent on the sixth aspect, and is characterized in that the liquid delivery section has a cylinder and a piston, and imparts the conveying force to the liquid stored in the cylinder by moving the piston relative to the cylinder.

[0020] According to this aspect, the liquid delivery unit has a cylinder and a piston, and applies a conveying force to the liquid stored in the cylinder by moving the piston relative to the cylinder. By using a liquid delivery unit configured in this way, it is possible to suppress pulsation of the liquid sprayed from the nozzle.

[0021] [Example 1] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. First, an overview of a liquid ejection device 1A of Example 1, which is an example of the liquid ejection device 1 of the present invention, will be described with reference to Figs. 1 and 2. The liquid ejection device 1A of this example is capable of ejecting a liquid L in a continuous flow L1, and also converting the continuous flow L1 into droplets L2, and causing the liquid L to collide with an object O in the form of droplets L2. However, the liquid ejection device 1 is not limited to this, and may be configured to be capable of causing the liquid L to collide with an object O in the form of a continuous flow L1, or may be configured to eject the liquid L in the form of droplets L2 from the beginning, and cause the liquid L to collide with an object O in the form of droplets L2.

[0022] As shown in Fig. 1, the liquid ejecting device 1A of this embodiment includes a nozzle 3 that ejects liquid L from a nozzle hole 3a shown in Fig. 2 in an ejection direction B along a first axis AX. The liquid ejecting device 1A of this embodiment also includes a liquid transport pipe 7B that transports the liquid L to the nozzle 3. The liquid ejecting device 1A of this embodiment also includes a suction unit 10 that has a suction port 12a shown in Fig. 2 and sucks the liquid L ejected from the nozzle 3 through the suction port 12a.

[0023] The liquid injection device 1A of this embodiment also includes a pump 2 (pump 2A) having a cylinder 21 in which a liquid chamber 23 and an air chamber 24 are provided, and a piston 22 that can move inside the cylinder 21 in directions A1 and A2. The liquid injection device 1A of this embodiment also includes a liquid storage section 4 in which the liquid L is stored, and a compressed air tank 5 in which compressed air is stored. Here, the liquid storage section 4 is connected to a liquid transport pipe 7A that is a liquid transport pipe 7 that transports the liquid L to the liquid chamber 23. The compressed air tank 5 is connected to an air transport pipe 8A that is an air transport pipe 8 that transports air to the air chamber 24. The liquid injection device 1A of this embodiment is configured to transport the liquid L that has already been transported from the liquid storage section 4 to the liquid chamber 23 to the nozzle 3 by transporting compressed air from the compressed air tank 5 to the air chamber 24 and moving the piston 22 in direction A1.

[0024] Furthermore, the liquid ejection device 1A of this embodiment includes a suction pump 6 connected to an air transport pipe 8B that transports the air sucked by the suction unit 10. The suction pump 6 is configured to be able to suck the liquid L sucked by the suction unit 10 together with the air.

[0025] The suction unit 10 will be described in detail below with reference to Fig. 2 to Fig. 7. In the liquid ejection device 1A of this embodiment, as shown in Fig. 2, the suction unit 10 has an extending portion 11 extending along the first axis AX, and a bent portion 12 connected to the extending portion 11 and bent in a bending direction intersecting the first axis AX. Here, the bent portion 12 is provided with a suction port 12a on the side opposite to the side connected to the extending portion 11, and is configured so that the suction port 12a is located on the injection direction B side of the nozzle hole 3a in the direction along the first axis AX.

[0026] The liquid ejecting device 1A of the present embodiment is configured in this manner, so that the liquid L can be continuously ejected from the nozzle 3 in a state in which the suction port 12a does not face directly opposite the target surface Of of the target O. Therefore, when the liquid L is ejected from the nozzle 3 onto the target O while being sucked by the suction unit 10, the liquid ejecting device 1A of the present embodiment can prevent the suction port 12a from sticking to the target surface Of of the target O as the liquid L is sucked by the suction unit 10.

[0027] 2, the nozzle 3 of the liquid ejection device 1A of this embodiment is configured to eject the liquid L as a continuous flow L1, and to convert the continuous flow L1 into droplets L2 so that the liquid L collides with the object O. In this way, by ejecting the liquid L as a continuous flow L1, and converting the continuous flow L1 into droplets L2 so that the droplets L2 collide with the object O, it is possible to dramatically improve the collision force of the liquid L compared to a configuration in which the liquid L is simply ejected as a continuous flow L1 and caused to collide as the continuous flow L1, or a configuration in which the liquid L is ejected in the form of droplets L2 from the beginning and caused to collide with the object O in the form of droplets L2.

[0028] 2, in the liquid ejection device 1A of this embodiment, the distance D1 along the first axis AX from the nozzle hole 3a to the suction port 12a is configured to be longer than the droplet formation distance D2 until the continuous flow L1 turns into droplets L2. Therefore, for example, as shown in FIG. 2, even in a state where the bent portion 12 is in contact with the object O, the liquid L can be collided with the object O as droplets L2 rather than the continuous flow L1. That is, the liquid L can be collided with the object O with a strong collision force while the suction unit 10 effectively sucks in the liquid L around the object O.

[0029] Note that distance D1 along the first axis AX from nozzle hole 3a to suction port 12a means the distance along the first axis AX from nozzle hole 3a to the part of suction port 12a that is farthest from nozzle hole 3a, as shown in Fig. 2. Also, droplet formation distance D2 can be changed depending on the hole diameter of nozzle hole 3a, the flow rate of liquid L, and the injection pressure, but is preferably set to 150 mm or less.

[0030] Hereinafter, actual measurement examples of the droplet formation distance D2 when the hole diameter of the nozzle hole 3a, the flow rate of the liquid L, and the injection pressure are changed in the configuration of the liquid ejecting device 1A of this embodiment will be shown. Note that the following are all actual measurement examples when the nozzle 3 has one nozzle hole 3a. However, the present invention is not limited to a configuration in which the nozzle 3 has one nozzle hole 3a, and the nozzle 3 may have multiple nozzle holes 3a.

[0031] First, the following Table 1 shows actual measurement examples of the droplet formation distance D2 when the nozzle hole 3a has a hole diameter of 120 μm and the flow rate and injection pressure of the liquid L are changed.

[0032] [Table 1]

[0033] Next, the following Table 2 shows actual measurement examples of the droplet formation distance D2 when the nozzle hole 3a has a hole diameter of 80 μm and the flow rate and injection pressure of the liquid L are changed.

[0034] [Table 2]

[0035] Next, the following Table 3 shows actual measurement examples of the droplet formation distance D2 when the nozzle hole 3a has a hole diameter of 50 μm and the flow rate and injection pressure of the liquid L are changed.

[0036] [Table 3]

[0037] Next, the following Table 4 shows actual measurement examples of the droplet formation distance D2 when the nozzle hole 3a has a hole diameter of 30 μm and the flow rate and injection pressure of the liquid L are changed.

[0038] [Table 4]

[0039] Next, the following Table 5 shows actual measurement examples of the droplet formation distance D2 when the nozzle hole 3a has a hole diameter of 23 μm and the flow rate and ejection pressure of the liquid L are changed.

[0040] [Table 5]

[0041] Next, the following Table 6 shows an example of actual measurements of the droplet formation distance D2 when the flow rate and ejection pressure of the liquid L are changed when the nozzle hole 3a has a hole diameter of 10 μm.

[0042] [Table 6]

[0043] As shown in Tables 1 to 6, the droplet generation distance D2 can be changed by changing the hole diameter of the nozzle hole 3a, the flow rate of the liquid L, and the injection pressure.

[0044] Here, the inner angle Θ1 of the bent portion 12 with respect to the first axis AX is preferably 80° or more and less than 180°. In such a configuration, for example, when the liquid L is ejected perpendicular (90°) to the target surface Of of the object O against which the liquid L is to be collided, that is, when the nozzle 3 and the suction unit 10 are arranged so that the first axis AX is perpendicular (90°) to the target surface Of, the suction port 12a is not 90° (directly facing) to the target surface Of, and the bending angle Θ2 of the bent portion 12 with respect to the target surface Of is up to -10°. By making the bending angle Θ2 of the bent portion 12 with respect to the target surface Of -10° or more and less than 90°, the liquid L of the target surface Of can be particularly efficiently sucked while preventing the suction port 12a from sticking to the object O.

[0045] In addition, the liquid ejection device 1A of this embodiment can also be configured to eject the liquid L obliquely onto the target surface Of by arranging the nozzle 3 and the suction unit 10 so that the first axis AX is oblique to the target surface Of, as shown in Fig. 2, for example. Depending on the shape and arrangement of the target object O, it may be easier for the user to work if the liquid L is ejected obliquely onto the target surface Of. And, by being configured as described above, the liquid ejection device 1A of this embodiment can eject the liquid L obliquely onto the target surface Of, while suitably suctioning the liquid L ejected onto the target object O.

[0046] However, even when the liquid L is jetted obliquely to the target surface Of, it is preferable that the bending angle Θ2 of the bent portion 12 with respect to the target surface Of be greater than or equal to -10° and less than 90°. This is because the liquid L jetted to the target object O can be particularly suitably sucked in while jetting the liquid L obliquely to the target surface Of. Note that, when the bending angle Θ2 of the bent portion 12 with respect to the target surface Of is 90°, this corresponds to the bent portion 12 not being bent with respect to the extending portion 11.

[0047] Here, Fig. 3 shows cases where the bending angle Θ2 of the bending portion 12 with respect to the target surface Of is 90°, 45°, 15°, 0°, -5°, and -10°. The experimental results of the suction efficiency using the suction unit 10 with these bending angles Θ2 are shown below. As shown in Fig. 4, the experiment was performed from the viewpoint of how many times the bending portion 12 sticks to the target surface Of (Fig. 5) and how many seconds it takes for the liquid above the target surface Of to be sucked up (Fig. 6) when the target object O is placed in the petri dish 30 and the petri dish 30 is filled with liquid L, and the suction pressure is set to 2 kPa, 10 kPa, and 20 kPa, and suction is performed using each of the suction units 10 with bending angles Θ2 of 90°, 45°, 15°, 0°, -5°, and -10°.

[0048] As shown in Fig. 5, the number of times the liquid stuck to the target decreased as the bending angle Θ2 was changed to 90°, 45°, 15°, 0°, -5°, and -10°, indicating that the liquid was efficiently suctioned. Also, as shown in Fig. 6, the suction time became shorter as the bending angle Θ2 was changed to 90°, 45°, 15°, 0°, and -5°, indicating that the liquid was efficiently suctioned. In this experiment, the object O used was of low flexibility, so when the bending angle Θ2 was set to -10°, the liquid above the target surface Of did not disappear entirely. However, when a highly flexible object O was used, the results when the bending angle Θ2 was set to -10° were equivalent to those when the bending angle Θ2 was set to -5°.

[0049] Here, the diameter of the nozzle hole 3a is preferably 10 μm or more and 120 μm or less. With such a configuration, it is possible to improve the impact force of the liquid L sprayed from the nozzle 3 against the object O. Furthermore, it is particularly preferable that the diameter of the nozzle hole 3a is 10 μm or more and 120 μm or less, the flow rate of the liquid L is 0.2 mL / min or more and 70 mL / min or less, the diameter of the suction port 12a is 0.5 mm or more and 5.0 mm or less, the suction pressure is 2 kPa or more and 20 kPa or less, and the bending angle Θ2 is -10° or more and less than 90°.

[0050] [Example 2] A liquid injection device 1B of Example 2 will be described below with reference to FIG. 7. FIG. 7 is a diagram corresponding to FIG. 1 showing the liquid injection device 1A of Example 1. The liquid injection device 1B of this example is similar to the liquid injection device 1A of Example 1 except for the configuration described below. Therefore, the liquid injection device 1B of this example has the same characteristics as the liquid injection device 1A of Example 1 except for the points described below. Therefore, in FIG. 7, components common to Example 1 above are indicated by the same reference numerals, and detailed descriptions will be omitted.

[0051] 7, in liquid injection device 1B of the present embodiment, the configuration of pump 2 (pump 2B) is different from the configuration of pump 2A of liquid injection device 1A of Example 1, and liquid storage section 4 connected to liquid chamber 23 as provided in liquid injection device 1A of Example 1 is not provided. Instead, liquid injection device 1B of the present embodiment has a liquid inlet port (not shown), and liquid chamber 23 is configured to be larger than liquid injection device 1A of Example 1, and the amount of liquid L stored in liquid chamber 23 in advance is increased. With such a configuration, liquid injection device 1B of the present embodiment can have a simpler device configuration than liquid injection device 1A of Example 1.

[0052] [Example 3] A liquid injection device 1C of Example 3 will be described below with reference to FIG. 8. FIG. 8 is a diagram corresponding to FIG. 1 showing the liquid injection device 1A of Example 1. The liquid injection device 1C of this example is similar to the liquid injection device 1 of Examples 1 and 2 except for the configuration described below. Therefore, the liquid injection device 1C of this example has similar features to the liquid injection device 1 of Examples 1 and 2 except for the points described below. Therefore, in FIG. 8, components common to Examples 1 and 2 are indicated by the same reference numerals, and detailed descriptions are omitted.

[0053] As shown in FIG. 8, in the liquid injection device 1C of this embodiment, the configuration of the pump 2 (pump 2C) is different from the configuration of the pump 2A of the liquid injection device 1A of the embodiment 1 and the pump 2B of the liquid injection device 1B of the embodiment 2, and the liquid injection device 1C of this embodiment does not have a liquid storage section 4 connected to the liquid chamber 23 as provided in the liquid injection device 1A of the embodiment 1, and further does not have a compressed air tank 5 connected to the air chamber 24 as provided in the liquid injection device 1A of the embodiment 1 and the liquid injection device 1B of the embodiment 2. Instead, the liquid injection device 1C of this embodiment is provided with a pump 2C having a piston 22 that can be manually moved by a user relative to a cylinder 21 in the directions A1 and A2. With such a configuration, the liquid injection device 1C of this embodiment can have a simpler device configuration than the liquid injection device 1A of the embodiment 1 and the liquid injection device 1B of the embodiment 2.

[0054] As described above, the liquid ejecting device 1 of the first to third embodiments includes the pump 2 as a liquid delivery unit that imparts a conveying force for conveying the liquid L to the nozzle 3. With such a configuration, the liquid L can be suitably conveyed to the nozzle 3, and the conveying force is imparted, so that the liquid L can be ejected from the nozzle 3 with strong pressure.

[0055] Moreover, the pump 2 of each of the liquid ejecting devices 1 of Examples 1 to 3 has a cylinder 21 and a piston 22, and is configured to impart a conveying force to the liquid L stored in the cylinder 21 by moving the piston 22 relative to the cylinder 21. By using a liquid delivery section configured in this way, it is possible to suppress pulsation of the liquid L ejected from the nozzle 3.

[0056] The present invention is not limited to the above-mentioned embodiments, and can be realized in various configurations without departing from the spirit of the present invention. The technical features in the embodiments corresponding to the technical features in each aspect described in the Summary of the Invention can be appropriately replaced or combined in order to solve some or all of the above-mentioned problems or to achieve some or all of the above-mentioned effects. Furthermore, if a technical feature is not described as essential in this specification, it can be appropriately deleted. [Explanation of symbols]

[0057] Reference Signs List 1...liquid injection device, 1A...liquid injection device, 1B...liquid injection device, 1C...liquid injection device, 2...pump (liquid delivery section), 2A...pump, 2B...pump, 2C...pump, 3...nozzle, 3a...nozzle hole, 4...liquid storage section, 5...compressed air tank, 6...suction pump, 7...liquid transport pipe, 7A...liquid transport pipe, 7B...liquid transport pipe, 8...air transport pipe, 8A...air transport pipe, 8B...air transport pipe, 10...suction section, 11...extension section, 12...bent section, 12a...suction port, 21...cylinder, 22...piston, 23...liquid chamber, 24...air chamber, 30...petri dish, L...liquid, L1...continuous flow, L...liquid droplet, O...object, Of...object surface

Claims

1. a nozzle that ejects liquid from a nozzle hole in an ejection direction along a first axis; a liquid transport pipe that transports the liquid to the nozzle; a suction unit having a suction port and configured to suck the liquid jetted from the nozzle through the suction port, The suction portion has an extending portion extending along the first axis and a bending portion connected to the extending portion and bent in a bending direction intersecting the first axis, A liquid injection device characterized in that the suction port is provided on the opposite side of the bent portion to the side connected to the extended portion, and the suction port is located on the injection direction side of the nozzle hole in the direction along the first axis.

2. The liquid ejection apparatus according to claim 1 , The nozzle is configured to be able to eject the liquid in a continuous stream and to convert the continuous stream into droplets so as to collide the liquid against a target object.

3. 3. The liquid ejection apparatus according to claim 2, A liquid ejecting apparatus, comprising: a nozzle hole; a suction port; a nozzle hole extending along the first axis; a nozzle hole extending along the first axis;

4. 4. The liquid ejection apparatus according to claim 1, A liquid ejecting device, wherein an interior angle of the bent portion relative to the first axis is equal to or greater than 80° and less than 180°.

5. 4. The liquid ejection apparatus according to claim 1, The liquid ejecting apparatus according to claim 1, wherein the nozzle hole has a diameter of 10 μm or more and 120 μm or less.

6. 4. The liquid ejection apparatus according to claim 1, A liquid ejecting apparatus comprising: a liquid delivery section that applies a delivery force for delivering the liquid to the nozzle.

7. 7. The liquid ejection apparatus according to claim 6, The liquid ejection device according to the present invention, characterized in that the liquid delivery section has a cylinder and a piston, and imparts the transport force to the liquid stored in the cylinder by moving the piston relative to the cylinder.

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