spray

Abstract

To restrain the occurrence of clogging in an annular groove and a spin groove in a nozzle tip.SOLUTION: A spray has a nozzle hole 13a penetrating in a longitudinal direction formed in a blocked wall 33 at a nozzle tip 13. In a rear surface of the blocked wall, the followings are formed: an annular groove 34 that surrounds the nozzle hole when viewed from the longitudinal direction and is in communication with a connection passage 30 in a push-down head 12; a spin groove 35 extending toward the nozzle hole side from the annular groove when viewed from the longitudinal direction; and a spin chamber 36 that provides communication between the spin groove and the nozzle hole and turns a content fluid from the spin groove around the nozzle hole. An inner diameter of the nozzle tip is 3 mm-4 mm, and a groove width of the annular groove is 0.2 mm-0.5 mm.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a spray. [Background technology]

[0002] 2. Description of the Related Art Conventionally, sprayers have been known in which a pump is actuated by pressing a depression head, and the content liquid is sprayed in the form of a mist from a nozzle hole in a nozzle tip. As an example of this type of spray, as shown in Patent Document 1 below, a known configuration is one in which the nozzle tip is formed in a cylindrical shape extending in the front-to-rear direction and has a blocking wall that blocks the front end opening, a nozzle hole that penetrates the blocking wall in the front-to-rear direction, and the rear surface of the blocking wall is formed with an annular groove that surrounds the nozzle hole when viewed from the front-to-rear direction and into which the content liquid from the pump flows, a spin groove that extends from the annular groove toward the nozzle hole when viewed from the front-to-rear direction, and a spin chamber that connects the spin groove and the nozzle hole to each other and swirls the content liquid from the spin groove around the nozzle hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-113733 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the conventional sprayers, when attempting to eject a liquid containing, for example, powder or a fine thin film of glitter, there was a risk of clogging in the annular groove or spin groove formed on the inner surface of the nozzle tip.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a spray that can prevent clogging of the annular groove, spin groove, etc. formed on the inner surface of the nozzle tip. [Means for solving the problem]

[0006] A sprayer according to one aspect of the present invention comprises a pump having a stem supported in an upwardly biased state so as to be movable downwardly; a push-down head attached to the upper end of the stem; and a nozzle tip attached to the push-down head and having a nozzle hole opening forward, wherein the push-down head has a communication passage connecting the interior of the upper end of the stem with the nozzle hole, the nozzle tip is formed in a cylindrical shape extending in the front-to-rear direction and has a blocking wall that blocks the front-end opening, the nozzle hole penetrating the blocking wall in the front-to-rear direction, and a rear surface of the blocking wall is formed with an annular groove that surrounds the nozzle hole as seen in the front-to-rear direction and communicates with the communication passage, a spin groove that extends from the annular groove toward the nozzle hole as seen in the front-to-rear direction, and a spin chamber that communicates the spin groove and the nozzle hole with each other and causes the content liquid from the spin groove to swirl around the nozzle hole, the inner diameter of the nozzle tip is 3 mm or more and 4 mm or less, and the groove width of the annular groove is 0.2 mm or more and 0.5 mm or less.

[0007] Since the groove width of the annular groove is 0.2 mm or more, the liquid content that has entered the annular groove from the upper end of the stem through the communication path of the pressing head can be smoothly introduced into the spin groove, and even when attempting to eject a liquid content that contains, for example, powder or a fine thin film of glitter component, clogging of the annular groove or spin groove formed on the inner surface of the nozzle tip can be prevented. Since the groove width of the annular groove is 0.5 mm or less, it is possible to swirl the content liquid around the nozzle hole in the spin chamber in a nozzle tip with an inner diameter of 4 mm or less, and the flow path length of the spin groove can be reliably secured.

[0008] The groove depth of the annular groove may be greater than the groove depth of the spin groove.

[0009] Since the groove depth of the annular groove is greater than the groove depth of the spin groove, the liquid content that has entered the annular groove from inside the upper end of the stem through the communication path can be smoothly introduced into the spin groove.

[0010] The width of the spin groove at a connection portion with the annular groove may be wider than the width of the annular groove.

[0011] The groove width of the spin groove at the connection portion with the annular groove is wider than the groove width of the annular groove, so that the liquid content that enters the annular groove from within the upper end of the stem through the connecting passage can be smoothly introduced into the spin groove.

[0012] The front end of the communication passage, which is connected to the annular groove, may face the annular groove in the front-to-rear direction over the entire nozzle radial direction, which is a direction that intersects with the central axis of the nozzle hole when viewed from the front-to-rear direction.

[0013] Since the front end of the communication passage faces the annular groove in the front-to-back direction over the entire radial area of ​​the nozzle, the content liquid can smoothly enter the annular groove from the communication passage, and clogging of the annular groove or spin groove formed on the inner surface of the nozzle tip can be reliably prevented.

[0014] The nozzle hole may have an inner diameter of 0.1 mm or more and 0.6 mm or less.

[0015] Since the inner diameter of the nozzle hole is 0.1 mm or more and 0.6 mm or less, in a nozzle tip with an inner diameter of 4 mm or less, it is possible to swirl the content liquid around the nozzle hole in the spin chamber, and the flow path length of the spin groove can be reliably secured. [Effects of the Invention]

[0016] According to this invention, clogging of the annular groove, spin groove, etc. formed on the inner surface of the nozzle tip can be suppressed. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 2 is a longitudinal cross-sectional view of a sprayer according to one embodiment. [Figure 2] FIG. 2 is an enlarged view of a portion of FIG. [Figure 3]FIG. 3 is a rear view of the nozzle tip of FIGS. 1 and 2. DETAILED DESCRIPTION OF THE INVENTION

[0018] A spray according to one embodiment will be described below with reference to the drawings. As shown in FIG. 1, the sprayer 1 includes a pump 11, a depression head 12, and a nozzle tip 13.

[0019] The pump 11 includes a stem 14, a plunger 15, a cylinder 16, a lower valve body 17, and a mounting cap 18. The stem 14, the plunger 15, the cylinder 16, the lower valve body 17, and the mounting cap 18 are arranged coaxially on a common axis.

[0020] Hereinafter, this common axis will be referred to as the pump axis O1, and in the direction along the pump axis O1, the side where the push-down head 12 is located relative to the mounting cap 18 will be referred to as the upper side, and the side where the mounting cap 18 is located relative to the push-down head 12 will be referred to as the lower side. Also, the direction along the pump axis O1 will be referred to as the up-down direction, the direction that intersects with the pump axis O1 as viewed from the up-down direction will be referred to as the pump radial direction, and the direction that circles around the pump axis O1 as viewed from the up-down direction will be referred to as the pump circumferential direction.

[0021] The attachment cap 18 is formed in the shape of a closed cylinder with a ring-shaped top wall. An internal thread is formed on the peripheral wall of the attachment cap 18, and the attachment cap is attached to the opening of a container body (not shown) that contains a liquid content. The liquid content may be, for example, a liquid containing powder or a fine thin film of glitter. The cylinder 16 extends downward from the inner peripheral edge of the top wall of the mounting cap 18. The cylinder 16 and the mounting cap 18 are integrally formed. The inner and outer diameters of the lower part of the cylinder 16 are smaller than those of the upper part of the cylinder 16. The lower valve element 17 is provided in the lower end of the cylinder 16 and serves as a check valve that allows the content liquid to flow from inside the container body to inside the cylinder 16 and prevents the content liquid from flowing in the reverse direction. The lower valve element 17 is a ball valve that abuts against the periphery of the lower end opening on the inner surface of the cylinder 16 so as to be able to move upward and separate.

[0022] The stem 14 includes an upper stem 21 and a lower stem 22 that are connected in the vertical direction. The upper stem 21 and the lower stem 22 may be formed integrally.

[0023] The lower stem 22 protrudes upward from the upper end opening of the cylinder 16. The lower end of the lower stem 22 is tightly fitted into the upper part of the cylinder 16 so as to be able to slide up and down. The inner and outer diameters of the lower part of the lower stem 22 are smaller than those of the upper part of the lower stem 22. The upper stem 21 is formed in a cylindrical shape with a top and is fitted into the upper part of the lower stem 22. A communication hole 21b is formed in the top wall of the upper stem 21, penetrating vertically. An attachment tube (upper end of the stem) 14a is formed in the top wall of the upper stem 21, protruding upward and having the push-down head 12 attached thereto. The communication hole 21b opens into the attachment tube 14a. The attachment tube 14a and the communication hole 21b are arranged coaxially with the pump axis O1.

[0024] The plunger 15 includes an outer cylinder portion 23 , an inner shaft portion 24 , and a connecting portion 25 .

[0025] The outer cylindrical portion 23 is inserted integrally into the cylinder 16 and the stem 14. The lower end of the outer cylindrical portion 23 is tightly fitted into the lower part of the cylinder 16 so as to be slidable up and down. The upper end of the outer cylindrical portion 23 is tightly fitted into the upper stem 21 so as to be slidable up and down. The upper end of the outer cylindrical portion 23 does not have to be fitted into the upper stem 21. The inner shaft portion 24 is surrounded by the outer cylinder portion 23 from the outside in the pump radial direction. The lower end surface of the inner shaft portion 24 protrudes downward from the lower end opening of the outer cylinder portion 23. The lower end surface of the inner shaft portion 24 is spaced upward while facing the lower valve body 17 in the up-down direction. A pressure accumulator valve portion 24a is formed at the upper end of the inner shaft portion 24, the diameter of which increases downward. The pressure accumulator valve portion 24a closely abuts against the peripheral edge of the opening of the communication hole 21b on the lower surface of the top wall of the upper stem 21 so as to be able to move downwardly away from it. A plurality of connecting portions 25 are provided at intervals around the pump, and connect the vertical middle portions of the outer cylinder portion 23 and the inner shaft portion 24. The biasing member 19 is sandwiched in the vertical direction between the lower end surfaces of the connecting portions 25 and the inner surface of the lower end of the cylinder 16.

[0026] The biasing member 19 supports the plunger 15 in an upward biased state so as to be movable downward. The pressure accumulator valve portion 24a of the plunger 15 closely contacts the peripheral edge of the opening of the communication hole 21b on the underside of the top wall of the upper stem 21, so that the stem 14 is also supported in an upward biased state so as to be movable downward via the plunger 15. The biasing member 19 is a coil spring.

[0027] The press-down head 12 is formed with a communication passage 30 that connects the inside of the mounting cylinder 14a of the stem 14 with a nozzle hole 13a, which will be described later. The communication passage 30 includes a vertical communication passage 31 that faces the communication hole 21b of the upper stem 21 in the vertical direction, and a horizontal communication passage 32 that extends from the vertical communication passage 31 toward the outside in the pump radial direction. Hereinafter, in the pump radial direction, the direction in which the horizontal communication passage 32 extends from the vertical communication passage 31 will be referred to as the front, and the opposite direction will be referred to as the rear.

[0028] The lateral communication passage 32 is formed in an annular shape and is disposed coaxially with the nozzle axis O2 that extends in the front-rear direction. Hereinafter, the direction intersecting the nozzle axis O2 as viewed from the front-rear direction will be referred to as the nozzle radial direction, and the direction circumferential around the nozzle axis O2 as viewed from the front-rear direction will be referred to as the nozzle circumferential direction. As shown in Figure 2, the lateral communication passage 32 is defined by an outer peripheral surface 32a located on the outer side of the nozzle radial direction and facing inward in the nozzle radial direction, and an inner peripheral surface 32b located on the inner side of the nozzle radial direction and facing outward in the nozzle radial direction.

[0029] The nozzle tip 13 is attached to the press-down head 12. The nozzle tip 13 is formed in a cylindrical shape extending in the front-rear direction and has a blocking wall 33 that blocks the front-end opening. A nozzle hole 13a is formed in the blocking wall 33, penetrating in the front-rear direction. The nozzle hole 13a is disposed coaxially with the nozzle axis O2. The inner diameter of the nozzle tip 13 is 3 mm or more and 4 mm or less. The inner diameter of the nozzle hole 13a is 0.1 mm or more and 0.6 mm or less.

[0030] The nozzle tip 13 is fitted into the front part of the horizontal connecting passage 32 of the press-down head 12. The nozzle tip 13 abuts against the outer peripheral surface 32a of the horizontal connecting passage 32 and is spaced outward in the nozzle radial direction from the inner peripheral surface 32b. As a result, the vertical connecting passage 31 communicates with the nozzle hole 13a through the gap between the inner peripheral surface of the nozzle tip 13 and the inner peripheral surface 32b of the horizontal connecting passage 32.

[0031] As shown in Figures 2 and 3, the rear surface of the blocking wall 33 is formed with an annular groove 34 that surrounds the nozzle hole 13a when viewed from the front-to-rear direction and communicates with the communication path 30, a spin groove 35 that extends from the annular groove 34 toward the nozzle hole 13a when viewed from the front-to-rear direction, and a spin chamber 36 that connects the spin groove 35 and the nozzle hole 13a to each other and causes the content liquid from the spin groove 35 to swirl around the nozzle hole 13a.

[0032] The annular groove 34 is disposed coaxially with the nozzle axis O2. The annular groove 34 is formed on the outer peripheral edge portion of the rear surface of the blocking wall 33. Of the inner surfaces defining the annular groove 34, an outer peripheral surface 34a that is located outward in the nozzle radial direction and faces inward in the nozzle radial direction is continuous with the inner peripheral surface of the nozzle tip 13 in the front-to-rear direction without any step. The annular groove 34 extends continuously over the entire length in the nozzle circumferential direction. The groove depth of the annular groove 34 is deeper than the groove depth of the spin grooves 35. The groove depth of the annular groove 34 is the same as the length of the nozzle hole 13a in the front-to-rear direction.

[0033] The groove width of the annular groove 34 is 0.2 mm or more and 0.5 mm or less. As shown in FIG. 2 , the front end portion 30a of the communication passage 30, which is connected to the annular groove 34, faces the annular groove 34 in the front-rear direction over the entire area in the nozzle radial direction. The annular groove 34 straddles the inner circumferential surface 32b of the lateral communication passage 32 in the nozzle radial direction. The groove width of the annular groove 34 is equal to the groove width of the front end portion 30a of the communication passage 30. It is preferable that the groove width of the annular groove 34 be equal to or greater than the groove width of the front end portion 30a of the communication passage 30.

[0034] The spin chamber 36 is disposed coaxially with the nozzle axis O2. The front portion of the spin chamber 36 has a diameter that decreases toward the front. As shown in FIG. 3, multiple spin grooves 35 are provided at intervals around the nozzle circumference. When viewed from the front-to-rear direction, the spin grooves 35 extend in a tangential direction to the inner circumferential surface of the spin chamber 36. The flow path length of the spin groove 35 is 1.2 mm or more. The groove width of the spin groove 35 narrows from the annular groove 34 toward the spin chamber 36. The groove width of the spin groove 35 at the connection portion with the annular groove 34 is wider than the groove width of the annular groove 34. The groove width of the spin groove 35 at the connection portion with the spin chamber 36 is the same as the groove width of the annular groove 34.

[0035] Next, the operation of the sprayer 1 configured as above will be described.

[0036] As the depression head 12 is pressed down, the stem 14 and plunger 15 move downward together. Then, with the lower valve body 17 still closing the lower-end opening of the cylinder 16, the lower end of the outer tube portion 23 of the plunger 15 slides downward within the lower portion of the cylinder 16. When the internal pressure within the lower portion of the cylinder 16 increases and reaches a predetermined value, the plunger 15 descends against the upward biasing force of the biasing member 19, and the pressure accumulator valve portion 24a moves downward away from the periphery of the opening of the communication hole 21b on the underside of the top wall of the upper stem 21. The lower portion of the cylinder 16 communicates with the communication passage 30 through the communication hole 21b and the mounting tube 14a. As a result, the liquid in the lower portion of the cylinder 16 passes through the communication passage 30, the annular groove 34, the spin groove 35, and the spin chamber 36 in this order, and is sprayed in a mist from the nozzle hole 13a.

[0037] When the internal pressure at the bottom of cylinder 16 decreases, the upward biasing force of biasing member 19 causes plunger 15 to move upward to its original position, and the pressure accumulator valve portion 24a comes into contact with the periphery of the opening of communication hole 21b on the underside of the top wall of upper stem 21. When the depression of push-down head 12 is released, the upward biasing force of biasing member 19 causes stem 14 and plunger 15 to move upward together. At this time, the lower end of outer tube portion 23 of plunger 15 slides upward within the lower part of cylinder 16, causing the internal pressure at the bottom of cylinder 16 to decrease and become negative, and lower valve body 17 rises to open the lower end opening of cylinder 16, allowing the liquid content within the container body to flow in through the lower end opening of cylinder 16.

[0038] As explained above, in the sprayer 1 according to this embodiment, the groove width of the annular groove 34 is 0.2 mm or more, so that the content liquid that has entered the annular groove 34 from inside the mounting tube 14a of the stem 14 through the communication path 30 of the push-down head 12 can be smoothly introduced into the spin groove 35. For example, even if an attempt is made to eject a content liquid containing powder or a fine thin film of glitter component, clogging of the annular groove 34 or spin groove 35 formed on the inner surface of the nozzle tip 13 can be suppressed.

[0039] Since the groove width of the annular groove 34 is 0.5 mm or less, in a nozzle tip 13 having an inner diameter of 4 mm or less, it is possible to swirl the content liquid around the nozzle hole 13a in the spin chamber 36, and the flow path length of the spin groove 35 can be reliably secured.

[0040] Since the groove depth of the annular groove 34 is deeper than the groove depth of the spin groove 35, the liquid content that enters the annular groove 34 from inside the mounting tube 14a of the stem 14 through the communication path 30 can be smoothly introduced into the spin groove 35.

[0041] The groove width of the spin groove 35 at the connection portion with the annular groove 34 is wider than the groove width of the annular groove 34, so that the liquid content that has entered the annular groove 34 from inside the mounting tube 14a of the stem 14 through the communication path 30 can be smoothly introduced into the spin groove 35.

[0042] Since the front end 30a of the communication passage 30 faces the annular groove 34 in the front-to-back direction over the entire area in the nozzle diameter direction, the content liquid can smoothly enter the annular groove 34 from the communication passage 30, and clogging of the annular groove 34 and the spin groove 35 formed on the inner surface of the nozzle tip 13 can be reliably prevented.

[0043] Since the inner diameter of the nozzle hole 13a is 0.1 mm or more and 0.6 mm or less, in a nozzle tip 13 with an inner diameter of 4 mm or less, it is possible to swirl the content liquid around the nozzle hole 13a in the spin chamber 36, and the flow path length of the spin groove 35 can be reliably secured.

[0044] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0045] For example, the groove depth of the annular groove 34 may be set to be equal to or less than the groove depth of the spin groove 35 . The groove width of the spin groove 35 at the connection portion with the annular groove 34 may be set to be equal to or smaller than the groove width of the annular groove 34 . The inner circumferential surface 32b of the lateral communication passage 32 may be located inside the annular groove 34 in the nozzle radial direction.

[0046] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and the above-described variations may be combined as appropriate. [Explanation of symbols]

[0047] 1 spray 11 Pump 12 Depressor head 13 Nozzle Tip 13a Nozzle hole 14 Stem 14a Mounting tube (upper end of stem) 30 Access Road 30a Front end 33 Blocking wall 34 Annular groove 35 Spin groove 36 Spin Room O1 Pump shaft O2 Nozzle axis (central axis of nozzle hole)

Claims

1. a pump having a stem supported in an upwardly biased state so as to be movable downward; a push-down head attached to the upper end of the stem; a nozzle tip attached to the press-down head and having a nozzle hole opening forward; a communication path is formed in the pressing head, the communication path connecting the inside of the upper end of the stem and the nozzle hole; the nozzle tip is formed in a cylindrical shape extending in the front-rear direction and has a closing wall that closes a front end opening, The nozzle hole is formed in the blocking wall so as to penetrate in the front-rear direction, On the rear surface of the blocking wall, an annular groove that surrounds the nozzle hole when viewed from the front-rear direction and communicates with the communication passage; a spin groove extending from the annular groove toward the nozzle hole when viewed from the front-rear direction; a spin chamber that communicates the spin groove and the nozzle hole with each other and causes the content liquid from the spin groove to swirl around the nozzle hole, The inner diameter of the nozzle tip is 3 mm or more and 4 mm or less, The groove width of the annular groove is 0.2 mm or more and 0.5 mm or less, The groove depth of the annular groove is greater than the groove depth of the spin groove.

2. a pump having a stem supported in an upwardly biased state so as to be movable downward; a push-down head attached to the upper end of the stem; a nozzle tip attached to the press-down head and having a nozzle hole opening forward; a communication path is formed in the pressing head, the communication path connecting the inside of the upper end of the stem and the nozzle hole; the nozzle tip is formed in a cylindrical shape extending in the front-rear direction and has a closing wall that closes a front end opening, The nozzle hole is formed in the blocking wall so as to penetrate in the front-rear direction, On the rear surface of the blocking wall, an annular groove that surrounds the nozzle hole when viewed from the front-rear direction and communicates with the communication passage; a spin groove extending from the annular groove toward the nozzle hole when viewed from the front-rear direction; a spin chamber that communicates the spin groove and the nozzle hole with each other and causes the content liquid from the spin groove to swirl around the nozzle hole, The inner diameter of the nozzle tip is 3 mm or more and 4 mm or less, The groove width of the annular groove is 0.2 mm or more and 0.5 mm or less, A spray in which the front end of the communication passage, which is connected to the annular groove, faces the annular groove in the front-to-back direction over the entire nozzle radial direction, which is a direction that intersects with the central axis of the nozzle hole when viewed from the front-to-back direction.

3. The spray according to claim 1 or 2, wherein a groove width of the spin groove at a connecting portion with the annular groove is wider than a groove width of the annular groove.

4. The spray according to any one of claims 1 to 3, wherein the inner diameter of the nozzle hole is 0.1 mm or more and 0.6 mm or less.

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