LIQUID EJECTION NOZZLE AND LIQUID EJECTION DEVICE

A liquid ejection nozzle that has a nozzle hole and ejects a liquid from the nozzle hole in a ejection direction toward a target subject includes a nozzle plate having the nozzle hole, and a pressing member having a through hole having a diameter larger than a diameter of the nozzle hole at a position corresponding to the nozzle hole in the ejection direction and configured to press the nozzle plate from a downstream side in the ejection direction.

The present application is based on and claims priority from JP Application Serial Number 2021-059711, filed Mar. 31, 2021, the disclosure of which is hereby incorporated by reference herein in its entirety.

BACKGROUND

1. Technical Field

The present disclosure relates to a liquid ejection nozzle and a liquid ejection device.

2. Related Art

Conventionally, a liquid ejection nozzle that ejects a liquid from a nozzle hole toward a target subject is used. For example, JP-A-2018-103173 discloses a handpiece capable of ejecting a fluid jet from a nozzle element. The handpiece of JP-A-2018-103173 is an example of a liquid ejection nozzle in which a liquid is ejected from a nozzle hole toward a target subject, but as described above, there are various types of liquid ejection nozzles that eject a liquid from a nozzle hole toward a target subject.

As a liquid ejection nozzle that ejects a liquid from a nozzle hole toward a target subject, a configuration in which a nozzle hole is formed in the nozzle plate and the liquid is ejected from the nozzle hole of the nozzle plate toward the target subject can be used. With such a configuration, it is possible to easily produce a liquid ejection nozzle with high precision. However, in the liquid ejection nozzle having such a configuration, there is a risk that the nozzle plate may be deformed by a pressure applied to the nozzle plate when the liquid is ejected from the nozzle hole. Therefore, an object of the present disclosure is to suppress deformation of a nozzle plate due to a pressure applied to the nozzle plate when a liquid is ejected from a nozzle hole.

SUMMARY

A liquid ejection nozzle according to the present disclosure for solving the problem is a liquid ejection nozzle that has a nozzle hole and ejects a liquid from the nozzle hole in an ejection direction toward a target subject and includes a nozzle plate having the nozzle hole, and a pressing member having a through hole having a diameter larger than a diameter of the nozzle hole at a position corresponding to the nozzle hole in the ejection direction and configured to press the nozzle plate from a downstream side in the ejection direction.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

First, the present disclosure will be schematically described.

A liquid ejection nozzle according to a first aspect of the present disclosure for solving the above problem is a liquid ejection nozzle that has a nozzle hole and ejects a liquid from the nozzle hole in an ejection direction toward a target subject, and includes a nozzle plate having the nozzle hole, and a pressing member having a through hole having a diameter larger than a diameter of the nozzle hole at a position corresponding to the nozzle hole in the ejection direction and configured to press the nozzle plate from the downstream side in the ejection direction.

According to the aspect, the pressing member having the through hole with the diameter larger than the diameter of the nozzle hole at the position corresponding to the nozzle hole in the ejection direction and configured to press the nozzle plate from the downstream side in the ejection direction is provided. Thus, due to the pressing member, deformation of the nozzle plate by a pressure applied to the nozzle plate can be suppressed without interfering with ejection of the liquid from the nozzle hole when the liquid is ejected from the nozzle hole.

In a liquid ejection nozzle according to the second aspect of the present disclosure, in the first aspect, a plurality of nozzle holes are provided in the nozzle plate.

According to the aspect, the plurality of nozzle holes are provided in the nozzle plate. As a result, the diameter of one nozzle hole can be reduced without reducing an amount of ejection of the liquid, and a sufficient amount of the liquid can be ejected at a high speed.

In a liquid ejection nozzle of a third aspect of the present disclosure, in the second aspect, one through hole is provided corresponding to each of the nozzle holes.

When the through hole is too large, an effect of suppressing the nozzle plate by the pressing member may decrease. However, according to the aspect, one through hole is provided corresponding to each nozzle hole. As a result, it is possible to suppress excessive enlargement of each of the through holes, and it is possible to suppress a decrease in the effect of suppressing the nozzle plate of the pressing member.

In a liquid ejection nozzle of a fourth aspect of the present disclosure, in the second aspect, one through hole is provided corresponding to the plurality of nozzle holes.

According to the aspect, one through hole is provided corresponding to the plurality of nozzle holes. As a result, the number of through holes can be reduced, and the pressing member having the through hole can be easily manufactured.

In a liquid ejection nozzle of a fifth aspect of the present disclosure, in any one of the first to fourth aspects, the pressing member is configured to be attached to and detached from the nozzle plate.

According to the aspect, the pressing member is configured to be attached to and detached from the nozzle plate. As a result, the pressing member can be easily replaced or cleaned.

In a liquid ejection nozzle of a sixth aspect of the disclosure, in any one of the first to fifth aspects, the pressing member includes a resin.

According to the aspect, the pressing member includes a resin. Because a shape made of the resin can be easily changed, the pressing member having the through hole can be easily manufactured using a resin.

In a liquid ejection nozzle of a seventh aspect of the present disclosure, in any one of the first to sixth aspects, in the pressing member, the through hole is subjected to a liquid-repellent treatment against a liquid.

According to the aspect, the through hole of the pressing member is subjected to the liquid repellent treatment against a liquid. As a result, when the liquid is ejected, it is possible to suppress wet-spreading of the liquid in the through hole and receiving of a force from the through hole and thus to suppress a reduction in ejection accuracy.

In a liquid ejection nozzle according to an eighth aspect of the present disclosure, in any one of the first to seventh aspects, the diameter of the through hole is equal to or less than a thickness of the pressing member in the ejection direction.

According to the aspect, the diameter of the through hole is equal to or less than the thickness of the pressing member in the ejection direction. As a result, it is possible to suppress excessive enlargement of the diameter of the through hole or excessive reduction in the thickness of the pressing member and thus to suppress a decrease in the effect of suppressing the nozzle plate of the pressing member.

A liquid ejection device of a ninth aspect of the present disclosure includes the liquid ejection nozzle according to any one of the first to eighth aspects, and a liquid supply device configured to supply the liquid to the liquid ejection nozzle.

According to this aspect, it is possible to suppress deformation of the nozzle plate due to a pressure applied to the nozzle plate without interfering with ejection of the liquid from the nozzle hole when the liquid is ejected from the nozzle hole.

In a liquid ejection device of a tenth aspect of the present disclosure, in the ninth aspect, the liquid supply device supplies the liquid to the liquid ejection nozzle using a gas pressure.

According to the aspect, the liquid can be easily supplied to the liquid ejection nozzle using a gas pressure.

First Embodiment

Hereinafter, embodiments according to the present disclosure will be described with reference to the accompanying drawings. Here, a liquid ejection device1is described as a liquid ejection device for facial skin or the like. Of course, the liquid ejection device1is not limited to that for facial skin, and can be applied to, for example, cleaning of skin such as that on the arms, hands, feet, and back, and can also be applied to cleaning of articles other than living bodies.

First, the outline of the liquid ejection device1of the embodiment will be described with reference toFIGS. 1 to 5. The liquid ejection device1of the embodiment cleans skin, such as that on a face, with a liquid ejected from a liquid ejection nozzle3. Specifically, the liquid ejection device1of the embodiment includes a liquid ejection nozzle3that ejects a liquid, and a liquid supply device2.

As illustrated inFIG. 1, the liquid supply device2includes a lid part4, an operating part5, a liquid accommodating part6configured to store a liquid to be ejected, and a liquid supply path10that connects the liquid accommodating part6to the liquid ejection nozzle3. The lid part4can be displaced in an open state as illustrated inFIG. 1and a closed state as illustrated inFIGS. 2 and 3by rotating around a rotating shaft part4a. A pump (not illustrated) is provided inside the liquid supply device2, and a liquid can be supplied from the liquid accommodating part6to the liquid ejection nozzle3via the liquid supply path10by a pressure of the pump.

As illustrated inFIGS. 1, 4, and 5, the liquid ejection nozzle3includes a handpiece unit13and a nozzle unit23. A switch13ais provided at the handpiece unit13, a liquid is ejected from the nozzle unit23by a user turning on the switch13a, and ejection of the liquid from the nozzle unit23stops when the user turns off the switch13a.

Next, details of the nozzle unit23of the liquid ejection device1of the embodiment will be described in detail with reference toFIGS. 6 to 9. As illustrated inFIG. 6, the nozzle unit23is installed at a tip end of the handpiece unit13. Specifically, as illustrated inFIG. 6, a male thread part131in which a liquid flow path131ais formed is provided on the tip end of the handpiece unit13. Then, as illustrated inFIGS. 6 and 7, a male thread mounting part311provided with a female thread part311ais formed inside a base part31of the nozzle unit23, and the nozzle unit23is mounted on the tip end of the handpiece unit13by fitting the male thread part131to the female thread part311a. Here, “tip end” refers to a tip end in an ejection direction D of the liquid illustrated inFIG. 7. Although the nozzle unit23is mounted on the handpiece unit13by fitting the male thread part131to the female thread part311ain the embodiment, the present disclosure is not limited to such a configuration, and for example, a protrusion and a recess may be respectively provided at the nozzle unit23and the handpiece unit13, and a snap fit method in which the protrusion is mated with the recess may be used. A nozzle hole321and a through hole331are minute things that cannot be visually recognized by the naked eye and thus are not illustrated inFIG. 4.

As illustrated inFIGS. 7 and 8, a nozzle plate32is fixed to the tip end side of the base part31. A method of fixing the nozzle plate32to the base part31is not particularly limited. The nozzle hole321is provided in the nozzle plate32. Additionally, a groove312is formed in the base part31to have an annular shape when seen in the ejection direction D, and an O-ring34is disposed as a sealing member in the groove312. With such a configuration, the liquid does not leak to the outside of the O-ring34via a gap between the base part31and the nozzle plate32in a direction intersecting the ejection direction D. The embodiment has the configuration in which the O-ring34is used to eliminate use of an adhesive and to avoid elution of the adhesive, but the present disclosure is not limited to such a configuration. Furthermore, as a material of the O-ring34, fluorine rubber, silicon rubber, or EPDM can be used to avoid elution from the O-ring34.

Further, as illustrated inFIGS. 7 and 8, a pressing member33is fixed to the tip end side of the nozzle plate32. In the embodiment, the pressing member33is fixed to the tip end side of the nozzle plate32by the pressing member33being engaged with the base part31by an engagement portion (not illustrated), but the method of fixing the pressing member33to the base part31or the nozzle plate32is not particularly limited. As illustrated inFIGS. 6 to 9, the through hole331is formed at a position corresponding to the nozzle hole321in the pressing member33, that is, at a position on an extension line downstream of the nozzle hole321in the ejection direction D. Because the liquid ejection nozzle3has such a configuration, the liquid supplied from the liquid supply device2to the liquid ejection nozzle3is ejected in the ejection direction D ofFIG. 7via a liquid flow path inside the handpiece unit13, the liquid flow path131a, a space portion of the male thread mounting part311, the nozzle hole321, and the through hole331.

As illustrated inFIG. 8, a diameter L2of the through hole331is sufficiently larger than a diameter L1of the nozzle hole321, and the liquid ejected from the nozzle hole321does not come into contact with the through hole331. In addition, as illustrated inFIG. 8, a thickness T2of the pressing member33in the ejection direction D is sufficiently greater than a thickness T1of the nozzle plate32, and the pressing member33is highly rigid. Here, the expression “the thickness T2of the pressing member33is sufficiently larger than the thickness T1of the nozzle plate32” means that the thickness T2of the pressing member33can be 10 times the thickness T1of the nozzle plate32or greater, for example. Thus, when the liquid is ejected from the nozzle hole321, a force is applied to the nozzle plate32in the ejection direction D, but the pressing member33can firmly press down on the nozzle plate32.

As described above, the liquid ejection nozzle3of the embodiment is a liquid ejection nozzle that has the nozzle hole321and ejects a liquid from the nozzle hole321in the ejection direction D toward the skin or the like as a target subject. Additionally, the liquid ejection nozzle3of the embodiment includes the nozzle plate32having the nozzle hole321, and the pressing member33that has the through hole331with a diameter greater than the diameter of the nozzle hole321at a position corresponding to the nozzle hole321in the ejection direction D and presses down the nozzle plate32from the downstream side in the ejection direction D.

As described above, the liquid ejection nozzle3of the embodiment includes the pressing member33that presses down the nozzle plate32from the downstream side in the ejection direction D. As a result, deformation of the nozzle plate32due to a pressure applied to the nozzle plate32can be suppressed. In addition, the diameter L2of the through hole331of the pressing member33is larger than the diameter L1of the nozzle hole321. Thus, when the liquid is ejected from the nozzle hole321, the liquid ejection nozzle3of the embodiment can suppress interference of the pressing member33in the ejection of the liquid from the nozzle hole321.

Here, a preferred range of the diameter L2of the through hole331will be described with reference toFIG. 9. The left side of the drawing ofFIG. 9illustrates an example of a case in which the diameter L2of the through hole331has a diameter L2athat is within a preferred range, and the right side ofFIG. 9illustrates an example of a case in which the diameter L2of the through hole331has a diameter L2bthat is not within a preferable range. The diameter L1of the nozzle hole321corresponds to a diameter of the liquid to be ejected and thus can be appropriately set according to uses or the like.

InFIG. 9, the maximum deviation of the ejection direction from a predetermined ejection direction D in the liquid ejection nozzle3of the embodiment is referred to as an inclination angle θ. The inclination angle θ is preferably 0°, but may be, for example, about 2° due to manufacturing tolerance or the like. In the left drawing ofFIG. 9, the diameter L2of the through hole331is the diameter L2a. The diameter L2ahas a size in which the liquid ejected from the nozzle hole321does not come into contact with the through hole331even when the liquid is ejected at the inclination angle θ at which the maximum deviation of the ejection direction occurs. Thus, in a case in which the diameter L2is applied as in the left drawing ofFIG. 9, even when the liquid ejected from the nozzle hole321is ejected at the inclination angle θ at which the maximum deviation of the ejection direction occurs, the liquid is ejected without interfering with the through hole331. A relation in which the liquid does not come into contact with the through hole331can be expressed using the inclination angle θ, the diameter L1of the nozzle hole321, the diameter L2of the through hole331, and the thickness T2of the pressing member33as shown in the following Equation 1:

On the other hand, in the right drawing ofFIG. 9, the diameter L2of the through hole331is a diameter L2b. The diameter L2bhas a size in which the liquid ejected from the nozzle hole321comes into contact with a tip end portion331aof the through hole331when the liquid is ejected at the inclination angle θ at which the maximum deviation of the ejection direction occurs. In a case in which the diameter L2as illustrated in the right drawing ofFIG. 9is formed, when the liquid ejected from the nozzle hole321is ejected at the inclination angle θ at which the maximum deviation of the ejection direction occurs, the liquid is ejected while being interfered with by the through hole331. When the liquid is ejected while being interfered with by the through hole331, it may cause an ejection failure, the through hole331may be wetted, and thus foreign matter may easily adhere to the through hole331.

Therefore, the diameter L2of the through hole331preferably has a size in which the liquid ejected from the nozzle hole321does not come into contact with the through hole331even when the liquid ejected from the nozzle hole321is ejected at the inclination angle θ at which the maximum deviation of the ejection direction occurs. The size that does not come into contact with the through hole331varies in accordance with the thickness T2of the pressing member33, and thus a lower limit value of the diameter L2of the through hole331also varies in accordance with the thickness T2of the pressing member33.

In addition, a preferred upper limit value of the diameter L2of the through hole331is equal to or less than the thickness T2of the pressing member33in the ejection direction D. When the diameter of the through hole331is too large or the thickness T2of the pressing member33is too small, the effect of suppressing the nozzle plate32of the pressing member33is reduced. However, a reduction in the effect of suppressing the nozzle plate32of the pressing member33can be suppressed by setting the diameter L2of the through hole331to be equal to or less than the thickness T2of the pressing member33in the ejection direction D.

In the embodiment, the inclination angle θ that is the deviation from the predetermined ejection direction D is allowed to be 2°. In this way, it is particularly preferable to set the inclination angle θ to 2° or less. The allowable inclination angle θ is preferably at least equal to or less than 45°, and thus the diameter of the through hole is preferably a diameter in which the liquid does not come into contact with the through hole331even when the inclination angle θ deviates from the predetermined ejection direction D by 45°. The upper limit of the diameter L2of the through hole331when the allowable inclination angle is 45° and the diameter of the through hole331does not come into contact with the liquid has the same length as the thickness T2of the pressing member33.

Here, the pressing member33is configured to be attached to and detached from the nozzle plate32. As a result, the pressing member can be easily replaced or cleaned. In the embodiment, the liquid ejection device1can be used even when the pressing member33is removed from the nozzle plate32. However, the present disclosure is not limited to the above described configuration. For example, the pressing member33and the nozzle plate may be integrally formed by, for example, insert molding.

Furthermore, in the liquid ejection nozzle3of the embodiment, the entire pressing member33is constituted of a resin. In this way, the pressing member33is preferably configured to include a resin. This is because a resin can easily change a shape, and thus the pressing member33having the through hole331can be easily manufactured using a resin. In addition, a resin has an advantage that it does not easily corrode.

Additionally, in the liquid ejection nozzle3of the embodiment, the through hole331of the pressing member33is subjected to a liquid repellent treatment against the liquid. As a result, when the liquid is ejected, the liquid wet-spreads at the through hole331and is subjected to a force from the through hole331, and thus it is possible to suppress a decrease in ejection accuracy. A liquid repellent treatment method is not particularly limited, and examples thereof include applying a fluorine compound to the through hole331.

In addition, as illustrated inFIG. 8, in the pressing member33of the liquid ejection nozzle3of the embodiment, the tip end portion331aof the through hole331is chamfered. Because the tip end portion331aof the through hole331is chamfered in this way, when the user uses the liquid ejection device1of the embodiment, sebum and the like are less likely to adhere to the through hole331. However, the present disclosure is not limited to the above described configuration.

Second Embodiment

Next, a liquid ejection device1of a second embodiment will be described with reference toFIGS. 10 and 11. InFIGS. 10 and 11, the constituent members common to those in the first embodiment described above are designated by the same reference numerals, and detailed description thereof will be omitted. Here, the liquid ejection device1of the embodiment has the same characteristics as those in the liquid ejection device1of the first embodiment described above and is configured in the same manner as the liquid ejection device1of the first embodiment except for the following description. Specifically, the same configuration as that in the liquid ejection device1of the first embodiment is used except for having a plurality of nozzle holes321and through holes331.

As illustrated inFIGS. 10 and 11, in the liquid ejection nozzle3of the liquid ejection device1of the embodiment, a plurality of nozzle holes321are provided in the nozzle plate32. As a result, the diameter of one nozzle hole321can be reduced without decreasing the ejection amount of the liquid, and a sufficient amount of the liquid can be ejected at high speed. This is because, when the liquid is ejected at the same pressure, the liquid can be ejected at a higher speed by reducing the diameter of the nozzle hole321.

As illustrated inFIGS. 10 and 11, in the liquid ejection nozzle3of the liquid ejection device1of the embodiment, one through hole331is provided corresponding to each of nozzle holes321. When the diameter L2of the through hole331is too large, the effect of suppressing the nozzle plate by the pressing member33may decrease. However, as described above, in the liquid ejection nozzle3of the embodiment, one through hole331is provided corresponding to each of the nozzle holes321. As a result, it is possible to suppress excessive enlargement of one through hole331, and thus the decrease in the effect of suppressing the nozzle plate32of the pressing member33is suppressed.

Third Embodiment

Next, a liquid ejection device1of a third embodiment will be described with reference toFIGS. 12 and 13.FIGS. 12 and 13are views corresponding toFIGS. 10 and 11of the liquid ejection device1of the second embodiment. Further, inFIGS. 12 and 13, the constituent members common to those of the first and second embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. Here, the liquid ejection device1of the embodiment has the same characteristics as those in the liquid ejection device1of the first and second embodiments described above, and is configured in the same manner as the liquid ejection device1of the first and second embodiments except for the following description. Specifically, it has the same configuration as the liquid ejection device1of the first embodiment except that it has a specific shape of the through hole331and a plurality of nozzle holes321.

As illustrated inFIGS. 12 and 13, in the liquid ejection nozzle3of the embodiment, a plurality of nozzle holes321are also provided in the nozzle plate32as in the liquid ejection nozzle3of the second embodiment. As a result, the diameter of one nozzle hole321can be reduced without decreasing the ejection amount of the liquid, and a sufficient amount of the liquid can be ejected at high speed.

On the other hand, as illustrated inFIGS. 12 and 13, in the liquid ejection nozzle3of the embodiment, one through hole331is provided corresponding to the plurality of nozzle holes321. In this way, the pressing member33having the through hole331is easily manufactured by reducing the number of through holes331. Further, an interval between the nozzle holes321can be made narrower.

As illustrated inFIG. 12, the through hole331of the embodiment has a configuration in which a wall331bprotrudes toward the center so that an opening area decreases as much as possible while a predetermined interval with respect to the nozzle holes321is ensured when seen in the ejection direction D. With such a configuration, excessive enlargement of the through hole331is suppressed, and the decrease in the effect of suppressing the nozzle plate32of the pressing member33is suppressed. However, the present disclosure is not limited to such a configuration, and for example, the through hole331may be configured so that the wall331bis circular when seen in the ejection direction D.

In the case of a configuration such as that of the embodiment, the liquids ejected from the adjacent nozzle holes321preferably do not interfere with each other even when the liquids are deviated from the predetermined ejection direction D. As described above, the liquid may be ejected while deviating from the predetermined ejection direction D due to manufacturing tolerances and the like, as described above, the interval between the adjacent nozzle holes321that can suppress interference between the liquids ejected from adjacent nozzle holes321changes in accordance with the thickness T2of the pressing member33. For example, when the thickness T2of the pressing member33is 10 mm, in a case in which the inclination angle θ from the predetermined ejection direction D is 1.4° or greater, the interval between the adjacent nozzle holes321is preferably 0.25 mm or more.

On the other hand, when the thickness T2of the pressing member33is 10 mm, in a case in which the interval between the adjacent nozzle holes321is 0.25 mm, the inclination angle θ from the predetermined ejection direction D is preferably suppressed to 1.4° or less. Similarly, when the thickness T2of the pressing member33is 10 mm, in a case in which the interval between the adjacent nozzle holes321is 0.5 mm, the inclination angle θ from the predetermined ejection direction D is preferably suppressed to 2.9° or less, in a case in which the interval between the adjacent nozzle holes321is 1.0 mm, the inclination angle θ from the predetermined ejection direction D is preferably suppressed to 3.8° or less, and in a case in which the interval between the adjacent nozzle holes321is 1.5 mm, the inclination angle θ from the predetermined ejection direction D is preferably suppressed to 5.7° or less.

Fourth Embodiment

Next, a liquid ejection device1of a fourth embodiment will be described with reference toFIGS. 14 and 15. InFIGS. 14 and 15, the constituent members common to those in the first to third embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. Here, the liquid ejection device1of the embodiment has a configuration in which the liquid enclosed inside a container is fed by a gas pressure.

As illustrated inFIG. 14, the liquid supply device2of the embodiment is an aerosol can, and a nitrogen gas N compressed to high pressure and a liquid L are enclosed in the liquid supply device2. The liquid L is supplied to the liquid ejection nozzle3, which is an actuator, via a liquid supply path D and a valve B, due to a pressure of the nitrogen gas N inside the liquid supply device2. The gas enclosed in the aerosol can is not limited to a compressed gas such as nitrogen or carbon dioxide and may be a liquefied gas such as dimethyl ether or liquefied natural gas.

When the user presses down the liquid ejection nozzle3which is an actuator, the valve B opens and the liquid L is ejected from the nozzle hole321. Furthermore, the valve B blocks a flow path of the liquid L by a user opening the liquid ejection nozzle3which is an actuator, and the ejection of the liquid L from the nozzle hole321stops.

Here, in the liquid supply device2of the embodiment, the nozzle unit23is installed at the valve B by press fitting. However, in order to prevent the nozzle unit23from being disassembled or modified, the nozzle unit23may be adhered to the valve B. In addition, the liquid ejection nozzle3of the embodiment has a structure including the nozzle plate32, and has a structure in which the pressing member33can be removed and the nozzle plate32can be assembled and replaced. However, the present disclosure is not limited to such a structure, and a structure in which the nozzle plate32is integrally molded with the liquid ejection nozzle3which is an actuator, a structure in which the nozzle plate32and the pressing member33are integrally molded with the liquid ejection nozzle3which is an actuator, a structure in which a part in which the nozzle plate32is unitized is press-fitted or fitted to the actuator, or the like may be adopted.

FIG. 15is an example of the valve B in the liquid ejection device1ofFIG. 14. As illustrated inFIG. 15, the valve B of the embodiment includes a housing300having a housing hole301and a spring S therein. Additionally, a stem302that is pressed by a spring S and a stem gasket303that presses the stem302are provided. When the user presses down the liquid ejection nozzle3, the stem302is moved down, a gap is formed between the stem gasket303and the stem302, and the liquid supply path D opens. In addition, when the user opens the liquid ejection nozzle3, the stem302is pressed upward by the spring S, the gap between the stem gasket303and the stem302is eliminated, and thus the liquid supply path D is closed.

The present disclosure is not limited to the embodiments described above, and can be realized in various configurations without departing from the gist of the present disclosure. Appropriate replacements or combinations may be made to the technical features in the embodiments which correspond to the technical features in the aspects described in the SUMMARY section to solve some or all of the problems described above or to achieve some or all of the advantageous effects described above. Additionally, when the technical features are not described herein as essential technical features, such technical features may be deleted appropriately.