Liquid ejecting nozzle and liquid ejecting apparatus

Abstract

The invention provides a liquid ejecting nozzle and a liquid ejecting apparatus. A liquid ejection nozzle (1) is provided with: a liquid feeding member (2) in which a flow path (2a) through which a liquid (3) flows is formed; a nozzle member (5) in which at least one nozzle hole (5a) for spraying the liquid (3) in a continuous flow (3a) and converting the continuous flow (3a) into droplets (3b) is formed; a first member (4) which is provided with a flow path (4a) through which the liquid (3) can flow, is disposed between the liquid feeding member (2) and the nozzle member (5), and has one end (4b) inserted into the flow path (2a) of the liquid feeding member (2); a nozzle pressing member (6) that presses and fixes the nozzle member (5) to the first member (4); and a second member (7) fixed to the liquid delivery member (2) by pressing the liquid delivery member (2) from the outside of the liquid delivery member (2) with one end (4b) inserted into the flow path (2a).

Description

Technical Field

[0001] The invention relates to a liquid spraying nozzle and a liquid spraying device. Background Art

[0002] In the past, various liquid injection nozzles and liquid injection devices equipped with the liquid injection nozzles have been used. Among them, there is such a liquid injection nozzle, which is equipped with: a liquid delivery component, which forms a flow path for liquid to circulate inside; and a nozzle component, which forms a nozzle hole. For example, Patent Document 1 discloses a flushing nozzle, which inserts the front end of a hose into the hole of a mother body that passes through the center of the hole, and uses a curing agent to bond and fix the mother body and the front end of the hose, and then makes a plurality of nozzle holes pass through the rivet hardware / hose / inner hardware from the outer periphery of the mother body. The front end of the hose is configured to insert the inner hardware with the front end blocked into the front end of the hose, and the hose is tightened and fixed to the inner hardware from the outer periphery of the hose with a rivet hardware.

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 10-230190

[0004] However, although the flushing nozzle disclosed in Patent Document 1 can flush the inner surface of a pipe along the inner surface of the pipe having a complex bend, the flushing nozzle for this purpose needs to have a spherical body, etc., which makes the body larger than the hose and is prone to large-scale. In addition, when used for purposes other than flushing the inner surface of a pipe, it cannot be said that the structure can spray liquid with sufficient impact pressure. Thus, the conventional liquid spraying nozzle disclosed in Patent Document 1 cannot spray liquid with a strong impact pressure and cannot be miniaturized. Summary of the invention

[0005] The liquid injection nozzle of the present invention for solving the above-mentioned problems is characterized in that it comprises: a liquid supply component, which forms a flow path for liquid to circulate inside; a nozzle component, which forms at least one nozzle hole for spraying the liquid in a continuous flow and reducing the continuous flow to droplets; a first component, which is provided with a flow path through which the liquid can flow, and is arranged between the liquid supply component and the nozzle component, and one end of the first component is inserted into the flow path of the liquid supply component; a nozzle pressing component, which presses and fixes the nozzle component to the first component; and a second component, which is fixed to the liquid supply component by pushing the liquid supply component from the outside of the liquid supply component in a state where the one end is inserted into the flow path. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a cross-sectional view showing the liquid ejecting nozzle of Example 1.

[0007] Figure 2 This is a cross-sectional view showing a liquid ejecting nozzle according to Example 2.

[0008] Figure 3 This is a cross-sectional view showing a liquid ejecting nozzle according to Example 3.

[0009] Figure 4 This is a cross-sectional view showing a liquid ejecting nozzle according to a fourth embodiment.

[0010] Figure 5 This is an exploded view showing the liquid ejecting nozzle of the fourth embodiment.

[0011] Figure 6 This is a schematic diagram showing a liquid ejecting apparatus according to Example 5, which is an example of a liquid ejecting apparatus to which the liquid ejecting nozzles according to Examples 1 to 4 can be mounted.

[0012] Figure 7 This is a schematic diagram showing a liquid ejecting apparatus according to Example 6, which is an example of a liquid ejecting apparatus to which the liquid ejecting nozzles according to Examples 1 to 4 can be mounted.

[0013] Description of Reference Numerals

[0014] 1…Liquid jet nozzle; 1A…Liquid jet nozzle; 1B…Liquid jet nozzle; 1C…Liquid jet nozzle; 1D…Liquid jet nozzle; 2…Liquid delivery member; 2a…Flow path; 3…Liquid; 3a…Continuous flow; 3b…Liquid droplet; 4…First member; 4a…Flow path; 4b…One end; 4c…Concave and convex; 4d…Conical portion; 4e…Inclined portion; 5…Nozzle member; 5a…Nozzle hole; 6…Nozzle pressing member; 6a…Hole portion; 6b…Setting portion; 7…Second member; 7a…Jet tip portion; 7b… Hole portion; 7c…a portion; 8…a threaded fixing portion; 8A…a male thread portion; 8B…a female thread portion; 8C…a male thread portion; 8D…a female thread portion; 8E…a male thread portion; 8F…a female thread portion; 8G…a male thread portion; 8H…a female thread portion; 8I…a male thread portion; 8J…a female thread portion; 10…a liquid injection device; 10A…a liquid injection device; 10B…a liquid injection device; 11…a pump; 12…an extrusion mechanism; 13…a syringe; 14…a piston; R1…a position; R2…a position; R3…an opposing area. DETAILED DESCRIPTION

[0015] First, the present invention will be briefly described.

[0016] The first mode of the liquid injection nozzle of the present invention for solving the above-mentioned problems is characterized in that it comprises: a liquid supply component, which forms a flow path for liquid to circulate inside; a nozzle component, which forms at least one nozzle hole for spraying the liquid in a continuous flow and reducing the continuous flow to droplets; a first component, which is provided with a flow path through which the liquid can flow, and is arranged between the liquid supply component and the nozzle component, and one end of the first component is inserted into the flow path of the liquid supply component; a nozzle pressing component, which presses and fixes the nozzle component to the first component; and a second component, which is fixed to the liquid supply component by pushing the liquid supply component from the outside of the liquid supply component in a state where the one end is inserted into the flow path.

[0017] According to this method, liquid can be ejected in a continuous flow, and the continuous flow can be made into droplets, so that the liquid impacts an object. In this way, by ejecting liquid in a continuous flow, and making the continuous flow into droplets and impacting an object in the form of droplets, the impact pressure of the liquid is greatly improved compared with a structure that simply ejects liquid in a continuous flow and impacts in a continuous flow state. In addition, by setting a structure in which one end of a first component that fixes a nozzle component with a nozzle pressing component is inserted into a flow path, a second component is used to push the liquid delivery component from the outside of the liquid delivery component and fix it to the liquid delivery component, the liquid ejection nozzle can be miniaturized.

[0018] The second mode of the liquid injection nozzle of the present invention is a mode subordinate to the first mode, and is characterized in that, in the injection direction of the liquid, it has an injection front end separated from the nozzle hole by a first distance, and the first distance is longer than the dropletization distance from the nozzle hole to the dropletization of the ejected continuous flow.

[0019] According to this method, the first distance from the nozzle hole to the injection front end is longer than the dropletization distance. That is, the liquid is in a dropletized state when it is ejected from the injection front end. Therefore, even when the injection front end is brought close to the object, it is possible to suppress the liquid from impacting the object in a state before dropletization, that is, in a continuous flow state. Therefore, even when the injection front end is brought close to the object, the liquid can impact the object with a strong impact pressure.

[0020] A third aspect of the liquid ejecting nozzle of the present invention is an aspect dependent on the first or second aspect, and is characterized in that the second member is formed in a state where a portion of the second member bites into the liquid supply member at a position opposed to the first member across the liquid supply member.

[0021] According to this aspect, the second member is formed in a state where a portion of the second member is bitten into the liquid supply member at a position opposed to the first member across the liquid supply member. With such a structure, it is possible to suppress the second member from falling off relative to the liquid supply member.

[0022] The fourth mode of the liquid injection nozzle of the present invention is a mode subordinate to the third mode, and is characterized in that a female thread portion is provided on the second member at a position where the second member is opposite to the first member across the liquid supply member, and a male thread portion that engages with the female thread portion is provided on the liquid supply member.

[0023] According to this aspect, the second member is provided with a female thread at a position where the second member faces the first member across the liquid supply member, and the liquid supply member is provided with a male thread that fits with the female thread. This structure can effectively prevent the second member from falling off relative to the liquid supply member.

[0024] A fifth aspect of the liquid ejecting nozzle of the present invention is an aspect dependent on the first or second aspect, and is characterized in that the first member is formed so as to partially bite into the liquid supply member at a position opposed to the second member across the liquid supply member.

[0025] According to this aspect, the first member is formed in a state where a portion of the first member is bitten into the liquid supply member at a position opposed to the second member across the liquid supply member. With such a structure, it is possible to suppress the first member from falling off relative to the liquid supply member.

[0026] The sixth mode of the liquid injection nozzle of the present invention is a mode subordinate to the first or second mode, and is characterized in that, at a position where the first component and the second component are opposed and in contact, a female thread portion is provided on the second component, and a male thread portion that engages with the female thread portion is provided on the first component.

[0027] According to this aspect, at a position where the first component and the second component are facing and in contact, the second component is provided with a female thread portion, and the first component is provided with a male thread portion that fits with the female thread portion. With such a structure, it is possible to effectively prevent the second component from falling off relative to the first component.

[0028] The seventh mode of the liquid injection nozzle of the present invention is a mode subordinate to the first or second mode, and is characterized in that it has an opposing area in which the first component and the nozzle pressing component are opposed to each other, the first component is provided with a female threaded portion in the opposing area, and the nozzle pressing component is provided with a male threaded portion engaged with the female threaded portion in the opposing area.

[0029] According to this method, the first component is provided with a female threaded portion in the opposing area, and the nozzle pressing component is provided with a male threaded portion that engages with the female threaded portion in the opposing area. By setting such a structure, it is possible to effectively prevent the nozzle pressing component from being separated from the liquid injection nozzle, and it is possible to effectively prevent the nozzle pressing component from being separated and the nozzle component cannot be pressed and fixed to the first component.

[0030] An eighth aspect of the liquid jet nozzle of the present invention is an aspect subordinate to the first or second aspect, and is characterized in that the first member is provided with a tapered portion having a thinner tip at one end so that the flow path widens toward the tip.

[0031] According to this method, the first component is provided with a tapered portion with a thinner front end at one end, so that the flow path widens toward the front end. When the liquid flows from the liquid-feeding component into the flow path of the first component, turbulence is easily generated around one end of the first component due to the step difference between the liquid-feeding component and one end of the first component, and there is a risk that the flow rate of the liquid will be reduced when turbulence is generated. However, by setting such a structure, a tapered portion is provided at one end of the first component, which can reduce the step difference between the liquid-feeding component and one end of the first component, and can suppress the reduction in the flow rate of the liquid.

[0032] A liquid ejecting nozzle according to a ninth aspect of the present invention is an aspect dependent on the first or second aspect, and is characterized in that the second member is configured to cover the outside of the nozzle pressing member.

[0033] According to this embodiment, the second member is configured to cover the outside of the nozzle pressing member. This structure can easily prevent the nozzle pressing member from being separated from the liquid ejecting nozzle, and can easily prevent the nozzle pressing member from being separated and unable to press and fix the nozzle member to the first member.

[0034] A liquid ejecting device according to a tenth aspect of the present invention is characterized by comprising: a liquid ejecting nozzle belonging to the first or second aspect; and a pump connected to the liquid ejecting nozzle.

[0035] According to this aspect, a pump connected to the liquid ejecting nozzle is provided. With such a structure, the liquid can be appropriately sent to the nozzle member of the liquid ejecting nozzle, and the liquid can be ejected at a high ejection pressure.

[0036] The liquid ejection device according to an eleventh aspect of the present invention is characterized by comprising: a liquid ejection nozzle belonging to the first or second aspect; a syringe connected to the liquid ejection nozzle; and a piston for moving the syringe.

[0037] According to this aspect, the syringe connected to the liquid ejecting nozzle and the piston for moving the syringe are provided, so that the liquid can be appropriately sent to the nozzle member of the liquid ejecting nozzle with a simple structure.

[0038] Example 1

[0039] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The liquid jet nozzle 1 of the present invention can jet liquid 3 in a continuous flow 3a and convert the continuous flow 3a into droplets 3b, so that the liquid 3 in the form of droplets 3b impacts an object. Figure 1 A liquid ejecting nozzle 1A according to Example 1, which is an example of the liquid ejecting nozzle 1 of the present invention, will be described.

[0040] Figure 1 The liquid jet nozzle 1A of the present embodiment shown in the figure comprises: a liquid feeding member 2, which is a pipe made of resin, for example, and has a flow path 2a for liquid 3 to flow therein; and a nozzle member 5, which has at least one nozzle hole 5a formed therein for jetting the liquid 3 as a continuous flow 3a and converting the continuous flow 3a into droplets 3b. Figure 1 As shown, the liquid jet nozzle 1A of this embodiment includes a first component 4, which is provided with a flow path 4a through which the liquid 3 can flow, and is arranged between the liquid supply component 2 and the nozzle component 5, and one end 4b is pressed into the liquid supply component 2 and the other end 4b is inserted into the flow path 2a of the liquid supply component 2. Furthermore, the liquid jet nozzle 1A of this embodiment includes: a nozzle pressing component 6, which presses and fixes the nozzle component 5a to the first component 4; and a second component 7, which pushes the liquid supply component 2 from the outside of the liquid supply component 2 in a state where the one end 4b is inserted into the flow path 2a, and the second component 7 is fixed to the liquid supply component 2.

[0041] As in the liquid jet nozzle 1A of the present embodiment, by jetting the liquid 3 as a continuous flow 3a and converting the continuous flow 3a into droplets 3b to impact the object in the form of droplets 3b, the impact pressure of the liquid 3 is greatly increased compared to a structure in which the liquid 3 is simply jetted as a continuous flow 3a and the continuous flow 3a is maintained to impact the object. In addition, by setting a structure such as the liquid jet nozzle 1A of the present embodiment: in a state in which one end 4b of the first member 4 of the nozzle member 5 is fixed by the nozzle pressing member 6 and inserted into the flow path 2a, the liquid feeding member 2 is pushed from the outside of the liquid feeding member 2 by the second member 7, thereby the second member 7 is fixed to the liquid feeding member 2, the liquid jet nozzle 1 can be miniaturized.

[0042] In addition, if the liquid jet nozzle 1A of the present embodiment is used, the inner wall of a container that is long in height, such as a milk bottle, a wine bottle with a narrow mouth, and a bottle, can be efficiently rinsed. Generally, when rinsing a container that is long in height, the distance from the nozzle component 5 to the rinse object to which the droplet 3b drips becomes longer, so the jet speed of the droplet 3b is attenuated, and there is a risk that the rinse force is reduced due to the reduction in impact pressure. However, if a small liquid jet nozzle 1 such as the liquid jet nozzle 1A of the present embodiment is used, the droplet 3b can be made to impact the rinse object while the dripping distance is appropriately adjusted, and the reduction in the rinse force that may be caused by the structure of the liquid jet nozzle 1 can be suppressed.

[0043] It should be noted that in the liquid jet nozzle 1A of the present embodiment, the liquid delivery component 2 is a pipe made of a resin such as a polyamide synthetic resin or a polyetheretherketone resin. The liquid delivery component 2 can preferably use a pipe having a pressure resistance of 10 MPa or more and 20 MPa or less, an outer diameter of 1 mm or more and an inner diameter of 0.5 mm or more. In addition, in the liquid jet nozzle 1A of the present embodiment, the nozzle pressing component 6 is a metal rigid component having a circular ring shape and a hole portion 6a constituting a flow path of the liquid 3. However, the structures of the liquid delivery component 2 and the nozzle pressing component 6 are not particularly limited.

[0044] In addition, in the liquid jet nozzle 1A of the present embodiment, the first component 4 and the second component 7 are metal products, but there is no particular limitation on the material and shape of the first component 4 and the second component 7. Furthermore, in the liquid jet nozzle 1A of the present embodiment, the nozzle component 5 is a disk-shaped component made of a metal such as stainless steel or nickel with a large tensile strength, and is formed with one or more nozzle holes 5a of Φ0.01 to 0.15 mm, but there is no particular limitation on the material and shape of the nozzle component 5, and the shape and number of the nozzle holes 5a. Here, when the diameter of the hole portion 6a of the nozzle pressing component 6 is Φ0.5 mm, when the formation pitch between the nozzle holes 5a when arranging a plurality of nozzle holes 5a is in the range of 10 times or more of the diameter of the nozzle holes 5a or less than 0.2 mm, the number of holes that can be arranged is set according to the nozzle hole diameter 5a. The thickness of the nozzle component 5 can be set, for example, in the range of 0.05 mm or more and 0.5 mm or less, and the nozzle holes 5a can be formed by selecting a process such as drilling, etching or punching, and by forming in this way, a small liquid jet nozzle 1 can be manufactured.

[0045] Here, the flow path 4a of the first component 4 is preferably 10 times or more and 50 times or less of the diameter of the nozzle hole 5a, and more preferably 10 times or more and 20 times or less of the diameter of the nozzle hole 5a. In addition, it is preferred that the wall thickness of the second component 7 at the position R1 of the liquid-feeding component 2 is set to be 0.8 times or more and 1.2 times or less of the wall thickness of the liquid-feeding component 2. In addition, in order to prevent the liquid jet nozzle 1 from being too large, it is preferred that the outer diameter of the second component 7 at the position R1 of the liquid-feeding component 2 is set to be 1.4 times or less of the outer diameter of the liquid-feeding component 2. In addition, a hole portion 7b connected to the nozzle hole 5a of the nozzle component 5 and the hole portion 6a of the nozzle pressing component 6 is formed in the second component 7, but the diameter of the hole portion 7b is not particularly limited. However, it is preferred that the diameter of the hole portion 7b is larger than the diameter of the nozzle hole 5a.

[0046] In addition, if Figure 1As shown, in the liquid jet nozzle 1A of the present embodiment, the distance from the nozzle hole 5a in the jet direction A of the liquid 3 to the front end of the liquid jet nozzle 1A corresponds to the distance from the nozzle hole 5a in the jet direction A of the liquid 3 to the front end of the second component 7. In other words, the liquid jet nozzle 1A of the present embodiment is provided with a jet front end portion 7a separated from the nozzle hole 5a by a first distance L1 in the jet direction A of the liquid 3. In addition, as described above, the liquid jet nozzle 1A of the present embodiment is configured to jet the liquid 3 in a continuous flow 3a and convert the continuous flow 3a into droplets 3b, so that the liquid 3 can impact the flushing object 4 in the form of droplets 3b, but as Figure 1 As shown, the first distance L1 is configured to be longer than a dropletizing distance L2 from the nozzle hole 5a to when the ejected continuous flow 3a is transformed into droplets 3b.

[0047] The liquid jet nozzle 1A of the present embodiment is formed in such a structure, so even when the jet front end portion 7a is brought close to the object, it is possible to suppress the liquid 3 from hitting the object in the state of the continuous flow 3a before being transformed into droplets 3b. Therefore, the liquid jet nozzle 1A of the present embodiment can prevent the liquid 3 from hitting the object in the state of droplets 3b rather than the continuous flow 3a, even when the jet front end portion 7a is brought close to the object, and can prevent the liquid 3 from hitting the object with a strong impact pressure.

[0048] In addition, if Figure 1 As shown, in the liquid jet nozzle 1A of the present embodiment, the second member 7 is configured to cover the outer side of the nozzle pressing member 6 in the jet direction A and the circumferential direction intersecting the jet direction A. By setting the liquid jet nozzle 1A of the present embodiment in such a structure, it is possible to easily prevent the nozzle pressing member 6 from being detached from the liquid jet nozzle 1A, and it is possible to easily prevent the nozzle pressing member 6 from being detached and the nozzle member 5 from being pressed and fixed to the first member 4.

[0049] In addition, if Figure 1 As shown, in the liquid injection nozzle 1A of the present embodiment, the second component 7 is riveted by applying force from the outside, thereby generating a convex portion at a portion 7c of the second component 7 that bites into the liquid supply component 2 and the second component 7 is fixed to the liquid supply component 2. In other words, in the liquid injection nozzle 1A of the present embodiment, the second component 7 is formed in a state where a portion 7c bites into the liquid supply component 2 at a position R1 that is opposite to the first component 4 with the liquid supply component 2 interposed therebetween. By setting it as such a structure, it is possible to suppress the second component 7 from falling off relative to the liquid supply component 2. It should be noted that the state where a portion 7c bites into the liquid supply component 2 refers to the state where a portion 7c bites into the liquid supply component 2. Figure 1As shown, as long as the cross-sectional shape is a structure in which a portion 7c of the second component 7 enters the interior of the liquid-supplying component 2, in addition to the structure in which the second component 7 bites into the liquid-supplying component 2 by riveting, etc. as in the present embodiment, it can also be set as a structure in which spiral thread grooves or other concave-convex grooves are pre-arranged in the second component 7 and the liquid-supplying component 2 so that the concave-convex grooves of the two are interlocked.

[0050] In addition, if Figure 1 As shown, in the liquid jet nozzle 1A of the present embodiment, a concave-convex 4c is formed at a position where the second component 7 is riveted in the first component 4, that is, at a position R1 where the second component 7 in the first component 4 faces the first component 4. Therefore, in the liquid jet nozzle 1A of the present embodiment, the first component 4 is easily engaged with the liquid feeding component 2 and is not easily removed.

[0051] In other words, in the liquid jet nozzle 1A of the present embodiment, at the position where the first member 4 is formed with the concavo-convex 4c, i.e., at the position R1 opposite to the second member 7 across the liquid-feeding member 2, a portion of the liquid-feeding member 2 enters the concave portion of the concavo-convex 4c, thereby being in a state where a portion is bitten into the liquid-feeding member 2. By setting such a structure, it is possible to suppress the first member 4 from falling off relative to the liquid-feeding member 2. It should be noted that the state where a portion is bitten into the liquid-feeding member 2 means that as long as the cross-sectional shape is a structure in which a portion of the liquid-feeding member 2 enters the interior of the first member 4, for example, as a structure other than the present embodiment, it may be set to a structure in which concavo-convex such as a spiral thread groove is pre-set on the first member 4 and the liquid-feeding member 2, and the concavo-convex of the two are fitted together.

[0052] Example 2

[0053] Below, refer to Figure 2 The liquid ejecting nozzle 1B according to the second embodiment will be described. Figure 2 The liquid ejecting nozzle 1A of the first embodiment corresponds to Figure 1 The liquid jet nozzle 1B of this embodiment is the same as the liquid jet nozzle 1A of the first embodiment except for the structure described below. Therefore, the liquid jet nozzle 1B of this embodiment has the same features as the liquid jet nozzle 1A of the first embodiment except for the structure described below. Figure 2 The same components as those in the above-mentioned embodiment 1 are represented by the same figure marks and detailed descriptions are omitted.

[0054] like Figure 2As shown, in the liquid injection nozzle 1B of the present embodiment, the first component 4 is provided with a tapered portion 4d having a thinner front end at one end 4b, so that the flow path 4a widens as it goes toward the front end, in other words, as it goes toward the opposite direction of the injection direction A. When the liquid 3 flows from the liquid supply component 2 into the flow path 4a of the first component 4, turbulence is easily generated around the one end 4b of the first component 4 due to the step difference between the liquid supply component 2 and the one end 4b of the first component 4, and there is a risk that the flow velocity of the liquid 3 is reduced when the turbulence is generated. However, by providing the tapered portion 4d at the one end 4b of the first component 4 as in the liquid injection nozzle 1B of the present embodiment, the step difference between the liquid supply component 2 and the one end 4b of the first component 4 can be reduced, and the flow velocity of the liquid 3 can be suppressed from being reduced.

[0055] In the liquid jet nozzle 1B of this embodiment, the angle θ of the tapered portion 4d relative to the flow path 2a is about 30°. Although this angle is not particularly limited, it is preferably 30° or less in order to effectively exert the turbulence suppression effect or to avoid a sharp decrease in the cross-sectional area of ​​the flow path of the liquid 3.

[0056] Example 3

[0057] Below, refer to Figure 3 The liquid ejecting nozzle 1C according to the third embodiment will be described. Figure 3 The liquid ejecting nozzle 1A of the first embodiment corresponds to Figure 1 The liquid jet nozzle 1C of this embodiment is the same as the liquid jet nozzle 1A of the first embodiment except for the structure described below. Therefore, the liquid jet nozzle 1C of this embodiment has the same features as the liquid jet nozzle 1A of the first embodiment except for the structure described below. Figure 3 The same components as those in the above-mentioned embodiment 1 are represented by the same figure marks and detailed descriptions are omitted.

[0058] like Figure 3 As shown, in the liquid jet nozzle 1C of this embodiment, at a position R1 where the second component 7 is opposed to the first component 4 across the liquid supply component 2, a female thread portion 8B is provided on the second component 7, and a male thread portion 8A engaged with the female thread portion 8B is provided on the liquid supply component 2. By setting such a structure, it is possible to effectively prevent the second component 7 from falling off relative to the liquid supply component 2.

[0059] In addition, if Figure 3As shown, in the liquid jet nozzle 1C of the present embodiment, the first component 4 has an opposing region R3 opposing the nozzle pressing component 6, the first component 4 is provided with a female threaded portion 8D in the opposing region R3, and the nozzle pressing component 6 is provided with a male threaded portion 8C engaged with the female threaded portion 8D in the opposing region R3. By setting such a structure, it is possible to effectively prevent the nozzle pressing component 6 from being detached from the liquid jet nozzle 1, and it is possible to effectively prevent the nozzle pressing component 6 from being detached and being unable to press and fix the nozzle component 5 to the first component 4.

[0060] In addition, if Figure 3 As shown, in the liquid jet nozzle 1C of this embodiment, at the position R2 where the first component 4 and the second component 7 are opposed and in contact, a female thread portion 8F is provided on the second component 7, and a male thread portion 8E engaged with the female thread portion 8F is provided on the first component 4. By setting such a structure, it is possible to effectively suppress the second component 7 from falling off relative to the first component 4.

[0061] In addition, when assembling the liquid jet nozzle 1C of this embodiment, the following sequence is followed: first, after installing the nozzle component 5, the female thread portion 8D and the male thread portion 8C are engaged to fix the first component 4 and the nozzle pressing component 6, then the female thread portion 8F and the male thread portion 8E are engaged to fix the first component 4 and the second component 7, and finally the female thread portion 8B and the male thread portion 8A are engaged to fix the second component 7 and the liquid feeding component 2. In addition, the screw fixing portion 8 in which the female thread portion and the male thread portion are engaged and fixed is not limited to the position and number as in the liquid jet nozzle 1C of this embodiment. For example, the male thread portion 8A and the female thread portion 8B, as well as the male thread portion 8C and the female thread portion 8D may be omitted, and only the female thread portion 8F of the second component 7 and the male thread portion 8E of the first component 4 may be provided as the screw fixing portion 8. If such a screw fixing portion 8 is provided, any component of the liquid jet nozzle 1 is not easily detached.

[0062] Example 4

[0063] Below, refer to Figure 4 and Figure 5 The liquid ejecting nozzle 1D according to the fourth embodiment will be described. Figure 4 The liquid ejecting nozzle 1A of the first embodiment corresponds to Figure 1 The liquid jet nozzle 1D of this embodiment is the same as the liquid jet nozzle 1 of Embodiments 1 to 3 except for the structure described below. Therefore, the liquid jet nozzle 1D of this embodiment has the same features as the liquid jet nozzle 1 of Embodiments 1 to 3 except for the structure described below. Figure 4 and Figure 5 The same components as those in the above-mentioned embodiments 1 to 3 are represented by the same figure marks, and detailed descriptions are omitted.

[0064] like Figure 4 and Figure 5 As shown, the liquid jet nozzle 1D of this embodiment is different from the liquid jet nozzle 1 of Examples 1 to 3 in the shape of each component except the liquid supply component 2 and the nozzle component 5. Specifically, the liquid jet nozzle 1D of this embodiment includes: a liquid supply component 2 having the same structure as the liquid supply component 2 of the liquid jet nozzle 1 of Examples 1 and 2; a nozzle component 5 having the same structure as the nozzle component 5 of the liquid jet nozzle 1 of Examples 1 to 3. In addition, it includes: a first component 4 and a second component 7, which are male threaded joint components having a male threaded portion 8I and inserted into the inner diameter portion of the liquid supply component 2; and a nozzle pressing component 6, which is a pressure retaining structure having a female threaded portion 8J fitted with the male threaded portion 8I.

[0065] The liquid jet nozzle 1D of this embodiment has a hard pipe made of polyamide synthetic resin or polyetheretherketone resin as the liquid delivery member 2, and a pipe sleeve as the joint member, i.e., a first member 4, is pressed into the inner diameter portion of the liquid delivery member 2, i.e., the flow path 2a. Figure 4 and Figure 5 As shown, in the liquid ejecting nozzle 1D of this embodiment, an inclined surface 4e which becomes thinner toward the front end is formed at one end 4b of the first member 4 so as to facilitate pressing the first member 4 into the liquid feeding member 2.

[0066] Here, if Figure 5 As shown, a male threaded portion 8G is provided on the first member 4, and a female threaded portion 8H that fits with the male threaded portion 8G is provided on the second member 7. Therefore, after the first member 4 is pressed into the liquid feeding member 2, the second member 7 is tightened to the first member 4. In addition, after the nozzle member 5 is set on the setting portion 6b provided in the nozzle pressing member 6, the nozzle pressing member 6 is rotated relative to the male threaded portion 8I of the first member 4 to tighten the female threaded portion 8J, thereby forming the liquid ejecting nozzle 1D of this embodiment.

[0067] By setting such a structure, the nozzle member 5 having the nozzle hole 5a formed therein can be easily loaded, unloaded and replaced, and the nozzle member 5 can be easily flushed and replaced with respect to the nozzle member 5 having the nozzle hole 5a having different nozzle diameters, nozzle numbers and nozzle hole shapes. In addition, a large number of low-cost liquid jet nozzles 1 can be provided, and can be used as a disposable component in a wide range of fields such as industrial and civilian uses. In addition, the material of each component is set to a sterilizable material, etc., so that each component can be applied to medical use, thereby also being applicable to medical use. In addition, the liquid jet nozzle 1D of this embodiment is configured to be able to spray liquid at a maximum of about 10 MPa.

[0068] In addition, if Figure 4As shown, in the liquid jetting nozzle 1D of the present embodiment, the distance from the nozzle hole 5a in the jetting direction A of the liquid 3 to the front end of the nozzle pressing member 6, i.e., the first distance, is shorter than the dropletizing distance from the nozzle hole 5a to the point where the jetted continuous flow 3a is transformed into droplets 3b. However, it is more preferable that the nozzle pressing member 6 is configured as follows, for example Figure 4 In the structure shown by the dotted line portion, the first distance is made longer than the droplet formation distance from the nozzle hole 5a to the point where the ejected continuous flow 3a is formed into droplets 3b by forming the hole portion 6a of the nozzle pressing member 6 longer.

[0069] Example 5

[0070] Hereinafter, a liquid ejection apparatus 10A according to a fifth embodiment, which is an example of a liquid ejection apparatus 10 to which the liquid ejection nozzles 1 according to the first to fourth embodiments can be mounted, will be described. Figure 6 1 is a schematic diagram showing a liquid ejection device 10A of this embodiment to which the liquid ejection nozzles 1 of the first to fourth embodiments can be mounted. The liquid ejection device 10A of this embodiment can be mounted with the liquid ejection nozzles 1 of the first to fourth embodiments. Figure 6 The same components as those in the above-mentioned embodiments 1 to 4 are represented by the same figure marks, and detailed descriptions are omitted.

[0071] like Figure 6 As shown, in the liquid ejection device 10A of this embodiment, there are provided: the liquid ejection nozzle 1 of any one of the embodiments 1 to 4; and the pump 11 connected to the liquid ejection nozzle 1. By setting such a structure, the liquid 3 can be appropriately sent to the nozzle member 5 of the liquid ejection nozzle 1, and the liquid 3 can be ejected with a strong ejection pressure.

[0072] Example 6

[0073] Hereinafter, a liquid ejection device 10B according to a sixth embodiment, which is an example of a liquid ejection device 10 to which the liquid ejection nozzles 1 according to the first to fourth embodiments can be mounted, will be described. Figure 7 1 is a schematic diagram showing a liquid ejection device 10B of this embodiment to which the liquid ejection nozzles 1 of the first to fourth embodiments can be mounted. The liquid ejection device 10B of this embodiment can be mounted with the liquid ejection nozzles 1 of the first to fourth embodiments. Figure 7 The same components as those in the above-mentioned embodiments 1 to 4 are represented by the same figure marks, and detailed descriptions are omitted.

[0074] like Figure 7As shown, in the liquid injection device 10B of this embodiment, there are: the liquid injection nozzle 1 of any one of the embodiments 1 to 4; the syringe 13 connected to the liquid injection nozzle 1; and the piston 14 for moving the syringe 13. It should be noted that the syringe 13 connected to the liquid injection nozzle 1 and the piston 14 for moving the syringe 13 form an extrusion mechanism 12, and the extrusion mechanism 12 extrudes the liquid 3 stored in the syringe 13 toward the liquid injection nozzle 1. This extrusion mechanism 12 composed of the syringe 13 and the piston 14 is a simple structure that can be used once, so the liquid injection device 10B of this embodiment has a simple structure and can appropriately deliver the liquid 3 to the nozzle part 5 of the liquid injection nozzle 1.

[0075] The present invention is not limited to the above-mentioned embodiments, and can be implemented in various structures within the scope of its purpose. The technical features in the embodiments corresponding to the technical features of the various modes described in the summary of the invention can be appropriately replaced or combined to solve part or all of the above-mentioned problems or achieve part or all of the above-mentioned effects. In addition, if the technical features are not described as essential elements in this specification, they can be appropriately deleted.

Claims

1. A liquid spray nozzle, characterized in that: have: A liquid delivery component, forming a flow path for liquid to flow therein; a nozzle member formed with at least one nozzle hole that ejects the liquid in a continuous stream and converts the continuous stream into droplets; a first component having a flow path through which the liquid can flow, and arranged between the liquid-feeding component and the nozzle component, wherein one end of the first component is inserted into the flow path of the liquid-feeding component; A nozzle pressing component, pressing and fixing the nozzle component to the first component; as well as The second member is fixed to the liquid supply member by pressing the liquid supply member from the outside of the liquid supply member in a state in which the one end is inserted into the flow path.

2. The liquid injection nozzle according to claim 1, characterized in that: In the ejection direction of the liquid, a jetting front end is provided at a first distance from the nozzle hole, The first distance is longer than a dropletization distance from the nozzle hole to when the ejected continuous flow is dropletized.

3. The liquid injection nozzle according to claim 1 or 2, characterized in that: The second member is formed in a state where a portion of the second member is bitten into the liquid supply member at a position opposed to the first member across the liquid supply member.

4. The liquid injection nozzle according to claim 3, characterized in that: The second member is provided with a female thread portion at a position where the second member faces the first member across the liquid supply member, and the liquid supply member is provided with a male thread portion that fits with the female thread portion.

5. The liquid injection nozzle according to claim 1 or 2, characterized in that: The first member is formed in a state where a portion of the first member bites into the liquid supply member at a position opposed to the second member across the liquid supply member.

6. The liquid injection nozzle according to claim 1 or 2, characterized in that: At a position where the first member and the second member face each other and contact each other, the second member is provided with a female thread portion, and the first member is provided with a male thread portion that fits with the female thread portion.

7. The liquid injection nozzle according to claim 1 or 2, characterized in that: The first member has an opposing region opposing the nozzle pressing member, The first component is provided with a female threaded portion in the opposing region, The nozzle pressing member is provided with a male thread portion in the facing region that is engaged with the female thread portion.

8. The liquid injection nozzle according to claim 1 or 2, characterized in that: The first component is provided with a tapered portion having a thinner front end at the one end, so that the flow path widens toward the front end.

9. The liquid injection nozzle according to claim 1 or 2, characterized in that: The second member is configured to cover the outside of the nozzle pressing member.

10. A liquid ejection device, characterized in that: have: The liquid ejecting nozzle according to claim 1 or 2; and A pump is connected to the liquid spraying nozzle.

11. A liquid ejection device, characterized in that: have: The liquid injection nozzle according to claim 1 or 2; a syringe connected to the liquid injection nozzle; and The piston moves the syringe.

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