Aerosol cap and aerosol product

Abstract

To make liquid dripping less likely to happen, while making jetting contents of an aerosol container in a wide range possible.SOLUTION: An aerosol cap mounted on an aerosol container includes: jetting holes 41a, 42a, 43a, 44a for jetting contents of the aerosol container. Between the first jetting hole 41a and the second jetting hole 42a, a liquid drip prevention part 50 is provided.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to an aerosol cap and an aerosol product. [Background technology]

[0002] An aerosol cap equipped with a spray nozzle is attached to the top of the aerosol container. The aerosol cap is provided with an operation button for pressing the stem of the aerosol container. When a user operates the operation button to press the stem of the aerosol container, the contents of the aerosol container flow from the stem into the spray nozzle of the aerosol cap and are sprayed out through a spray hole formed in the spray nozzle.

[0003] The spray nozzle disclosed in Patent Document 1 has a plurality of spray holes, and the contents of the aerosol container are sprayed from all of the spray holes at once. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4410337 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, as disclosed in Patent Document 1, by using a spray nozzle having multiple spray holes, the contents of an aerosol container can be sprayed over a wide area. However, when multiple spray holes are formed in a spray nozzle, the spray particles immediately after being sprayed from each spray hole collide with each other, increasing the particle diameter, which can result in dripping around the spray hole. This tendency is particularly pronounced when the spray time is long.

[0006] The present disclosure has been made in consideration of such points, and its object is to make it possible to spray the contents of an aerosol container over a wide area while preventing dripping. [Means for solving the problem]

[0007] To achieve the above object, one aspect of the present disclosure can be based on an aerosol cap attached to an aerosol container. The aerosol cap has three or more spray holes for spraying the contents of the aerosol container. A drip prevention part is provided between a first spray hole and a second spray hole adjacent to the first spray hole to prevent the contents from dripping.

[0008] According to this configuration, the presence of three or more spray holes allows the contents of the aerosol container to be sprayed over a wide area. Furthermore, when the contents of the aerosol container are sprayed from each spray hole for a predetermined time or longer and then spraying is stopped, dripping is unlikely to occur even if the spray particles collide with each other immediately after being sprayed from each spray hole, resulting in an increase in particle size.

[0009] The aerosol cap may have a first cylindrical portion forming the first injection hole and a second cylindrical portion forming the second injection hole. In this case, the first cylindrical portion may be provided at a radial distance from the second cylindrical portion, and the drip prevention portion may be provided between the first cylindrical portion and the second cylindrical portion. The drip prevention portion may be a reservoir portion in which the contents sprayed from the three or more injection holes temporarily accumulate. In other words, the contents sprayed from the three or more injection holes temporarily accumulate in the reservoir portion and then gradually evaporate, thereby reducing the risk of dripping.

[0010] The three or more injection holes may include the first injection hole, the second injection hole, the third injection hole, and a fourth injection hole. In this case, the container may have a third cylindrical portion forming the third injection hole and a fourth cylindrical portion forming the fourth injection hole, and the first cylindrical portion, the second cylindrical portion, the third cylindrical portion, and the fourth cylindrical portion may be arranged at intervals in the radial direction so that a rectangle formed by connecting the radial center of the first cylindrical portion, the radial center of the second cylindrical portion, the radial center of the third cylindrical portion, and the radial center of the fourth cylindrical portion is a square. The drip prevention portion may be formed by a space surrounded by the first cylindrical portion, the second cylindrical portion, the third cylindrical portion, and the fourth cylindrical portion, and the drip prevention portion may be a reservoir portion in which the contents sprayed from the three or more injection holes accumulate.

[0011] The average particle diameter (D50) of the spray particles at a distance of 50 cm from the spray hole can be set to 120 μm or more and 140 μm or less.

[0012] Furthermore, by attaching the aerosol cap to an aerosol container, an aerosol product equipped with the aerosol cap can be produced. This aerosol product is able to spray the contents over a wide area while being less likely to drip. [Effects of the Invention]

[0013] As described above, a drip prevention section for preventing the contents from dripping is provided between a first injection hole and a second injection hole located adjacent to the first injection hole among the three or more injection holes, so that the contents can be sprayed over a wide area while dripping is less likely to occur. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of the upper portion of an aerosol product according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the upper portion of an aerosol product according to an embodiment of the present invention. [Figure 3] FIG. 3 is a perspective view of a tip provided on the aerosol cap. [Figure 4] FIG. 4 is a front view of the chip. [Figure 5] FIG. 5 is a rear view of the chip. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 7 is a cross-sectional view of a tubular portion according to the first modification. [Figure 8] FIG. 8 is a cross-sectional view of a tubular portion according to the second modification. [Figure 9] FIG. 9 is a cross-sectional view showing a state in which a tip is attached to a tubular portion according to the second modification. [Figure 10] FIG. 10 is a front view of a chip according to the third modification. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the present invention, its applications, or its uses.

[0016] Fig. 1 is a perspective view showing the upper portion of an aerosol product 1 according to an embodiment of the present invention. Fig. 2 is a vertical cross-sectional view of the upper portion of the aerosol product 1. The aerosol product 1 includes an aerosol cap 2 and an aerosol container 3. In this embodiment, the aerosol product 1 is made up of the aerosol cap 2 and the aerosol container 3, but the aerosol product 1 may also include components other than the aerosol cap 2 and the aerosol container 3.

[0017] In the description of this embodiment, the "front side" refers to the direction in which the contents of the aerosol container 3 are sprayed when the user holds the aerosol product 1 in a state in which it is to be used, the "rear side" refers to the side opposite the direction in which the contents are sprayed when the user holds the aerosol product 1 in that state, the "right side" refers to the side that is to the right as seen from the user when the user holds the aerosol product 1 in that state, and the "left side" refers to the side that is to the left as seen from the user when the user holds the aerosol product 1 in that state. The front side and the rear side can also be referred to as the front side and the rear side, respectively. These definitions are provided merely for the sake of convenience, and any direction may be the front or the rear.

[0018] As shown in Fig. 2, the aerosol container 3 comprises a vertically elongated container body 30 containing the contents, a valve mechanism 31 provided at the top of the container body 30, and a stem (ejection pipe) 32. The container body 30 is a cylindrical pressure-resistant container. The stem 32 is provided at approximately the center of the upper wall of the container body 30. The lower end of the stem 32 is capable of communicating with the interior of the container body 30 via the valve mechanism 31. The stem 32 is biased upward by the valve mechanism 31 so as to protrude upward from the upper wall of the container body 30, and is also capable of being pushed downward (into the interior of the container body 30).

[0019] When stem 32 is pressed downward, valve mechanism 31 opens, placing stem 32 in communication with the interior of container body 30, and the contents are sprayed to the outside by the pressure of the propellant. When the downward external force on stem 32 is removed, stem 32 returns to its original position by the biasing force of valve mechanism 31, and valve mechanism 31 closes. The contents contained in container body 30 can be, for example, a substance that has a spraying and cooling effect and contains a chlorofluorocarbon alternative as its active ingredient. By spraying the chlorofluorocarbon alternative onto pests and causing them to adhere, the pests are instantly cooled, stopping their movement and being exterminated.

[0020] Specific examples of contents that can instantly cool pests include hydrofluorocarbons (Hydro Fluoro Carbons) and hydrofluoroolefins. Hydrofluorocarbons and hydrofluoroolefins have chemical properties that make them extremely low flammable. A specific example of a content is HFO-1234ze (1,3,3,3-tetrafluoropropene) (chemical formula: CF3CH=CFH, CAS No. 1645-83-6). HFO-1234ze is non-flammable and also has the characteristic of having a low global warming potential (GWP).

[0021] The contents may contain liquefied petroleum gas (LPG), dimethyl ether (DME), compressed gas (carbon dioxide, nitrogen, nitrous oxide), etc. Among these, only one arbitrarily selected propellant may be contained, or a mixture of two or more arbitrarily selected propellants may be contained.

[0022] The contents may contain an insecticide. Examples of insecticides contained in the contents include pyrethroid, organophosphate, carbamate, and neonicotinoid insecticides. The contents may contain any one of the pyrethroid, organophosphate, carbamate, and neonicotinoid insecticides, or any two or more of them.

[0023] Examples of pyrethroid insecticides include etofenprox, cyfluthrin, phthalthrin, fenpropathrin, permethrin, bifenthrin, fenothrin, cyphenothrin, cypermethrin, tralomethrin, pyrethrins, allethrin, resmethrin, furamethrin, empenthrin, prallethrin, imiprothrin, momfluorothrin, transfluthrin, metofluthrin, profluthrin, dimefluthrin, mepafluthrin, etc. Any one of these may be contained in the contents, or any two or more of them may be contained in the contents.

[0024] Examples of organophosphate insecticides include acephate, fenitrothion, dichlorvos, chlorpyrifos-methyl, diazinon, fenthion, etc. Any one of these may be contained in the contents, or any two or more of them may be contained in the contents.

[0025] Examples of carbamate insecticides include carbaryl, propoxur, etc. Any one of these may be contained in the contents, or any two or more of them may be contained in the contents.

[0026] Examples of neonicotinoid insecticides include acetamiprid, thiamethoxam, imidacloprid, dinotefuran, etc. Any one of these may be contained in the contents, or any two or more of them may be contained in the contents.

[0027] The insecticide is not limited to those mentioned above, and for example, metoxadiazone, fipronil, amidoflumet, broflanilide, etc. may be contained in the contents.

[0028] The insecticide may include, for example, an essential oil or an essential oil-derived component. Examples of usable essential oils or essential oil-derived components include peppermint oil, rosemary oil, orange oil, fennel oil, cinnamon oil, clove oil, turpentine, eucalyptus oil, cypress oil, Japanese cypress oil, patchouli oil, sandalwood oil, camphor oil, jasmine oil, neroli oil, bergamot oil, butiglenil oil, lemon oil, lemongrass oil, cinnamon oil, citronella oil, geranium oil, copaiba oil, ginger oil, citral, L-menthol, citronellyl acetate, cinnamic aldehyde, terpineol, nonyl alcohol, cis-jasmone, limonene, linalool, 1,8-cineole, geraniol, α-pinene, p-menthane-3,8-diol, eugenol, menthyl acetate, thymol, benzyl benzoate, and benzyl salicylate. Any one of these may be contained in the contents, or any two or more of these may be contained in the contents.

[0029] The contents may contain a solvent. Examples of solvents contained in the contents include ether-based, hydrocarbon-based, ester-based, alcohol-based, fluorine-based, and water. Any one of these may be contained in the contents, or any two or more of these may be contained in the contents.

[0030] Examples of ether-based solvents include diethyl ether, ethylene glycol dimethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, tetrahydrofuran, dioxane, etc. Any one of these may be contained in the contents, or any two or more of these may be contained in the contents.

[0031] Examples of hydrocarbon solvents include xylene, toluene, alkylnaphthalene, phenylxylylethane, kerosene, light oil, hexane, cyclohexane, etc. Any one of these may be contained in the contents, or any two or more of these may be contained in the contents.

[0032] An example of the ester solvent is isopropyl myristate.

[0033] Examples of alcohol-based solvents include ethanol, isopropanol, benzyl alcohol, ethylene glycol, etc. Any one of these may be contained in the contents, or any two or more of these may be contained in the contents.

[0034] Examples of fluorine-based solvents include hydrofluoroolefins (HFOs).

[0035] Examples of water that can be used as a solvent include tap water, ion-exchanged water, distilled water, filtered water, sterilized water, and groundwater.

[0036] The contents may contain, for example, pest repellent ingredients, film-forming agents, water-repellent ingredients (such as silicone), powders, fragrances, deodorizing ingredients, surfactants, synergists, disinfecting ingredients, antibacterial ingredients, antifungal ingredients, detergents, antioxidants, ultraviolet absorbers, etc.

[0037] The pests to be exterminated may be creeping pests or flying pests, and specific examples include mosquitoes, midges, flies, stable flies, cockroaches, bedbugs, stink bugs, moths, winged ants, ants, fire ants, Argentine ants, centipedes, millipedes, house centipedes, pill bugs, caterpillars, midges, spiders, planthoppers, leafhoppers, moth flies, black flies, horseflies, bees, fungus gnats, booklice, crane flies, and thrips.

[0038] When the volume ratio of the concentrate (components other than the propellant) to the propellant (gas) contained in the aerosol container 3 is defined as the liquid-to-gas ratio (liquid / gas), the liquid-to-gas ratio ranges from 0 / 100 to 98 / 2. If the liquid-to-gas ratio falls within this range, the spray properties will be excellent and the particle diameter will be the desired size.

[0039] When the contents are sprayed from the aerosol container 3, they may be sprayed toward pests, or may be sprayed toward space, the floor, or gaps. The direction of spraying the contents may be upward, downward, or horizontal.

[0040] Next, we will explain the aerosol cap 2. The aerosol cap 2 is a member attached to the top of the aerosol container 3, and is made of, for example, a resin material. As shown in Fig. 2, the aerosol cap 2 includes a cap body 20 fixed to the aerosol container 3, a stem fitting portion 21 that fits into the stem 32, an operation button 22 for operating the stem fitting portion 21 in the pushing operation direction of the stem 32, and an aerosol nozzle 23.

[0041] The lower part of the cap body 20 is formed in a cylindrical shape, and this cylindrically formed part is adapted to fit into the upper part of the container body 30. A stem fitting part 21, an operation button 22, and an aerosol nozzle 23 are arranged in the center of the cap body 20 in the left-right direction.

[0042] The stem fitting portion 21 has a cylindrical shape extending in the vertical direction and is integrally molded with the lower portion of the aerosol nozzle 23. A connecting plate portion 26 that is connected to the lower portion of the cap body 20 is provided at the lower portion of the aerosol nozzle 23. This connecting plate portion 26 is elastic, and connects the aerosol nozzle 23 to the lower portion of the cap body 20 so that the aerosol nozzle 23 can swing up and down. The elasticity of the resin allows the connecting plate portion 26 to elastically deform. The operation button 22 is integrally molded with the rear side of the aerosol nozzle 23. Pressing the operation button 22 downward moves the stem 32 downward, opening the valve mechanism 31. The cap body 20, stem fitting portion 21, operation button 22, and aerosol nozzle 23 are integrated into a single component.

[0043] A first flow path 231 and a second flow path 232 are formed in the aerosol nozzle 23. The first flow path 231 extends vertically inside the aerosol nozzle 23. The lower end of the first flow path 231 is the upstream end, and is connected to the upper part of the stem 32 of the aerosol container 3 via the stem fitting portion 21. Therefore, the first flow path 231 communicates with the upper part of the stem 32 and extends upward.

[0044] The second flow path 232 extends toward the front. That is, a circular tubular portion 23a that communicates with the upper end of the first flow path 231 is formed at the top of the aerosol nozzle 23 so as to protrude toward the front. The second flow path 232 is formed inside the tubular portion 23a. The tubular portion 23a has the same inner diameter from the upstream end to the downstream end and is straight. The rear end of the second flow path 232 communicates with the upper end of the first flow path 231, so that the flow direction of the contents that flow upward through the first flow path 231 changes by approximately 90 degrees when they flow into the second flow path 232. The contents that flow into the second flow path 232 flow toward the front through the second flow path 232.

[0045] A tip 40 as shown in FIGS. 3 to 6 is attached to the tubular portion 23a of the aerosol nozzle 23. The tip 40 is made of a resin material and has a cylindrical shape extending in the front-rear direction as a whole. As shown in FIGS. 5 and 6, an insertion hole 40a into which the tubular portion 23a is inserted is formed in the tip 40. A center line A (see FIG. 6) of the insertion hole 40a extends in the front-rear direction and is located in the center of the tip 40 in the up-down and left-right directions. The insertion hole 40a opens on the rear end surface of the tip 40. When the tubular portion 23a is inserted into the insertion hole 40a from the opening on the rear end surface, the tubular portion 23a fits tightly into the insertion hole 40a, and the tip 40 is connected to the tubular portion 23a. A liquid-tight connection is ensured at the connection between the tubular portion 23a and the tip 40, so that the contents do not leak from the connection between the tubular portion 23a and the tip 40.

[0046] 3, the front portion of the tip 40 is the portion that sprays the contents, and has a first injection hole 41a, a second injection hole 42a, a third injection hole 43a, and a fourth injection hole 44a for spraying the contents of the aerosol container 3. The first injection hole 41a, the second injection hole 42a, the third injection hole 43a, and the fourth injection hole 44a all have the same diameter, which is set in the range of 0.1 mm to 5.0 mm.

[0047] A first cylindrical portion 41, a second cylindrical portion 42, a third cylindrical portion 43, and a fourth cylindrical portion 44 are formed in the front portion of the tip 40, and protrude forward. The first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 44 are cylindrical and protrude forward from the front end surface (tip surface) 40b of the main body portion of the tip 40. The protrusion amount of the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 44 from the front end surface 40b is set to 3.0 mm or more.

[0048] The first cylindrical portion 41 is located above the center line A of the insertion hole 40a. The first cylindrical portion 41 is a portion that forms the first injection hole 41a, and the first injection hole 41a is formed inside the first cylindrical portion 41, extending forward. The center line B1 (shown in FIG. 4) of the first injection hole 41a is parallel to the center line A of the insertion hole 40a and extends in the front-to-rear direction. The cross-sectional shape of the first injection hole 41a in a direction perpendicular to the center line B1 is circular. The rear end of the first injection hole 41a is connected to the downstream end of the insertion hole 40a. The front end (downstream end) of the first injection hole 41a opens to the front end face of the first cylindrical portion 41.

[0049] The second cylindrical portion 42 is located to the left of the center line A of the insertion hole 40a. The second cylindrical portion 42 is the portion that forms the second injection hole 42a, and the second injection hole 42a is formed inside the second cylindrical portion 42, extending forward. The center line B2 of the second injection hole 42a is parallel to the center line A of the insertion hole 40a and extends in the front-to-rear direction. The cross-sectional shape of the second injection hole 42a in a direction perpendicular to the center line B2 is circular. The rear end of the second injection hole 42a is connected to the downstream end of the insertion hole 40a. The front end (downstream end) of the second injection hole 42a opens to the front end face of the second cylindrical portion 42.

[0050] The third cylindrical portion 43 is located below the center line A of the insertion hole 40a. The third cylindrical portion 43 is a portion that forms the third injection hole 43a, and the third injection hole 43a is formed inside the third cylindrical portion 43, extending forward. The center line B3 of the third injection hole 43a is parallel to the center line A of the insertion hole 40a and extends in the front-to-rear direction. The cross-sectional shape of the third injection hole 43a in a direction perpendicular to the center line B3 is circular. The rear end of the third injection hole 43a is connected to the downstream end of the insertion hole 40a. The front end (downstream end) of the third injection hole 43a opens to the front end face of the third cylindrical portion 43.

[0051] The fourth cylindrical portion 44 is located to the right of the center line A of the insertion hole 40a. The fourth cylindrical portion 44 is the portion that forms the fourth injection hole 44a, and the fourth injection hole 44a is formed inside the fourth cylindrical portion 44, extending forward. The center line B4 of the fourth injection hole 44a is parallel to the center line A of the insertion hole 40a and extends in the front-to-rear direction. The cross-sectional shape of the fourth injection hole 44a in a direction perpendicular to the center line B4 is circular. The rear end of the fourth injection hole 44a is connected to the downstream end of the insertion hole 40a. The front end (downstream end) of the fourth injection hole 44a opens to the front end face of the fourth cylindrical portion 44.

[0052] The first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 44 are provided at intervals from one another in the radial direction. Specifically, the first cylindrical portion 41 is located diagonally to the upper right of the second cylindrical portion 42, so a space is formed between the first cylindrical portion 41 and the second cylindrical portion 42. When the third cylindrical portion 43 is used as a reference, the third cylindrical portion 43 is located diagonally to the lower right of the second cylindrical portion 42, so a space is formed between the third cylindrical portion 43 and the second cylindrical portion 42. Furthermore, since the first cylindrical portion 41 is located diagonally above and to the left of the fourth cylindrical portion 44, a space is formed between the first cylindrical portion 41 and the fourth cylindrical portion 44, and further, since the third cylindrical portion 43 is located diagonally below and to the left of the fourth cylindrical portion 44, a space is formed between the third cylindrical portion 43 and the fourth cylindrical portion 44. In this way, spaces are formed between the outer walls of the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 44.

[0053] In this embodiment, the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 44 are arranged at intervals in the radial direction so that a rectangle formed by connecting the radial center of the first cylindrical portion 41 (shown by reference symbol B1 in FIG. 4), the radial center of the second cylindrical portion 42 (shown by reference symbol B2 in FIG. 4), the radial center of the third cylindrical portion 43 (shown by reference symbol B3 in FIG. 4), and the radial center of the fourth cylindrical portion 44 (shown by reference symbol B4 in FIG. 4) is a square. Because the positional relationship between the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 43 is set in this manner, a space surrounded by the outer walls of the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 43 is formed. Furthermore, a similar effect can be obtained even when the positional relationship between the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43 and the fourth cylindrical portion 44 is set so that the rectangle formed by connecting the radial center of the first cylindrical portion 41, the radial center of the second cylindrical portion 42, the radial center of the third cylindrical portion 43 and the radial center of the fourth cylindrical portion 44 is a rectangular shape.

[0054] The distance between the radial center of the first cylindrical portion 41 and the radial center of the second cylindrical portion 42 is set in the range of 2 mm to 10 mm. Similarly, the distance between the radial center of the second cylindrical portion 42 and the radial center of the third cylindrical portion 43, the distance between the radial center of the third cylindrical portion 43 and the radial center of the fourth cylindrical portion 44, and the distance between the radial center of the first cylindrical portion 41 and the radial center of the fourth cylindrical portion 44 are each set. This allows a predetermined amount of content to be accumulated between the outer walls of the cylindrical portions 41, 42, 43, and 44 by surface tension, as will be described later.

[0055] Tip 40 is provided with a drip prevention section 50. That is, immediately after being sprayed from spray holes 41a, 42a, 43a, and 44a, spray particles collide with each other, increasing the particle diameter and possibly adhering to the outer circumferential surfaces of cylindrical sections 41, 42, 43, and 44. If the spray time is long, such as when the contents are sprayed for a predetermined time or longer, the amount of contents adhering to the outer circumferential surfaces of cylindrical sections 41, 42, 43, and 44 will increase. When the amount of contents adhering to the outer peripheral surfaces of the cylindrical portions 41, 42, 43, and 44 becomes large, there is a risk of dripping. However, in this embodiment, the contents sprayed from the spray holes 41a, 42a, 43a, and 44a can be temporarily stored in the spaces between the outer walls of the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 43, and in the space surrounded by the outer walls of the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 43. This space where the contents can be stored is the storage portion. Since the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 44 protrude from the front end surface 40b by 3.0 mm or more, a sufficient amount of contents can be stored in the storage portion. The upper limit of the amount of protrusion of the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43 and the fourth cylindrical portion 44 from the front end surface 40b is set to, for example, 6 mm or less.

[0056] The size of the space between the outer walls of the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 44, and the space surrounded by the outer walls of the first cylindrical portion 41, the second cylindrical portion 42, the third cylindrical portion 43, and the fourth cylindrical portion 44, are set so that the contents sprayed from the spray holes 41a, 42a, 43a, and 44a can be temporarily stored by the surface tension acting between the outer walls of the cylindrical portions 41, 42, 43, and 44. The contents stored in the storage portion gradually evaporate, making it less likely to drip. This storage portion constitutes the drip prevention portion 50.

[0057] As shown in Figure 6, a guide portion 45 is provided inside tip 40 to guide the contents flowing from the upstream side to injection holes 41a, 42a, 43a, and 44a. Guide portion 45 is located on center line A of insertion hole 40a and protrudes upstream beyond the upstream end openings of injection holes 41a, 42a, 43a, and 44a. The outer diameter of guide portion 45 becomes smaller as it goes further upstream.

[0058] The average particle diameter (D50) of the spray particles injected from the first injection hole 41a, the second injection hole 42a, the third injection hole 43a, and the fourth injection hole 44a of the tip 40 is 110 μm to 150 μm, more preferably 120 μm to 140 μm, at a distance of 30 cm in the injection direction from the downstream end openings of the first injection hole 41a, the second injection hole 42a, the third injection hole 43a, and the fourth injection hole 44a. The average particle diameter can be adjusted to the above range by adjusting the hole diameter and the inner diameter of the flow path, as described below. The average particle diameter was measured at a distance of 50 cm in the injection direction from the first injection hole 41a, the second injection hole 42a, the third injection hole 43a, and the fourth injection hole 44a.

[0059] Here, we will explain how to measure the average particle size of particles injected from the first injection hole 41a, the second injection hole 42a, the third injection hole 43a, and the fourth injection hole 44a of the tip 40. Although not shown, the content is injected from a position where the distance between the laser beam irradiated onto the light receiving section by the laser light irradiating section of the particle size measuring device and the downstream end openings of the first injection hole 41a, the second injection hole 42a, the third injection hole 43a, and the fourth injection hole 44a of the tip 40 is 30 cm, so that the particles pass through the laser beam in a direction perpendicular to the direction of irradiation. Measurements are taken during the injection of the content, and the particle size distribution of the content can be analyzed by an automatic processing device to determine the average particle size (D50). This method is well known. The measuring instrument used is a Microtrac-Bell LDSA-SPR-1500A.

[0060] FIG. 7 is a cross-sectional view of the tubular portion 23a according to Modification 1. The tubular portion 23a of Modification 1 has a larger inner diameter in the downstream portion than in the upstream portion. A tapered surface 23b is formed at the downstream end of the tubular portion 23a. By providing a difference in inner diameter between the downstream and upstream portions of the tubular portion 23a, it becomes possible to adjust the particle diameter. If the particle diameter becomes too large, dripping and flashback are likely to occur. Therefore, the difference in inner diameter between the downstream and upstream portions of the tubular portion 23a is provided to set the particle diameter such that dripping and flashback are unlikely to occur.

[0061] Figure 8 is a cross-sectional view of the tubular portion 23a according to Modification 2. The tubular portion 23a of Modification 2 also has a larger inner diameter in the downstream portion than in the upstream portion, but the inner diameter of the downstream portion in Modification 2 is larger than that in Modification 1. Also in Modification 2, a tapered surface 23b is formed at the downstream end of the tubular portion 23a. Note that the dimensions in Figures 7 and 8 are in millimeters.

[0062] 9 is a cross-sectional view showing a state in which a tip 40 is attached to a tubular portion 23a according to Modification 2. The inner surface of this tip 40 is formed with a reduced diameter surface 46 that reduces in diameter toward the upstream end openings of the injection holes 41a, 42a, 43a, and 44a. The angle (inclination angle) of the reduced diameter surface 46 with respect to the center line A is in the range of 50° to 60°. By forming the reduced diameter surface 46 within this angle range, the contents can flow smoothly toward the injection holes 41a, 42a, 43a, and 44a, and the momentum of the contents when injected is less likely to decrease. The reduced diameter surface 46 may be provided as needed.

[0063] (test) Next, a test for determining whether or not there is dripping will be described. First, an aerosol product 1 was prepared by attaching an aerosol cap 2 having a tip 40 to an aerosol container 3. The aerosol container 3 to which the aerosol cap 2 was attached was placed in an upright position (vertical position), a position tilted 30° forward from the vertical position, a position tilted 60° forward from the vertical position, and a horizontal position (position for spraying directly downward), and the contents were sprayed for approximately 5 seconds in each position. The contents were a mixture of HFO-1234ze and DME, totaling 300 ml.

[0064] Test results have shown that by using the tip 40 of this embodiment, the contents can be temporarily stored in the drip prevention part 50 regardless of the position of the aerosol container 3, making dripping less likely to occur. In particular, by setting the average particle size (D50) in the range of 110 μm or more and 150 μm or less, dripping becomes even less likely to occur, and by setting it in the range of 120 μm or more and 140 μm or less, dripping becomes even less likely to occur.

[0065] The above-described embodiment is merely illustrative in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. For example, the number of injection holes may be three, or may be five or more.

[0066] For example, the tip 40 of Modification 3 shown in Fig. 10 has a first injection hole 41a, a second injection hole 42a, and a third injection hole 43a. In this case, a first cylindrical portion 41, a second cylindrical portion 42, and a third cylindrical portion 43 are formed in the front portion (tip side portion) of the tip 40. The first cylindrical portion 41, the second cylindrical portion 42, and the third cylindrical portion 43 are arranged at intervals in the radial direction so that the shape formed by connecting the radial center of the first cylindrical portion 41 (indicated by reference symbol B1 in Fig. 10), the radial center of the second cylindrical portion 42 (indicated by reference symbol B2 in Fig. 10), and the radial center of the third cylindrical portion 43 (indicated by reference symbol B3 in Fig. 10) forms a triangle. In the case of this modified example 3, the intervals between the first injection hole 41 a, the second injection hole 42 a, and the third injection hole 43 a are also set to be intervals that allow for the formation of a space in which the contents can be stored by utilizing surface tension. Furthermore, although not shown, in the case of having five injection holes, it is sufficient to form five cylindrical portions so that the shape formed by connecting the centers of the five injection holes forms a pentagon.

[0067] In short, the spacing of the injection holes (cylindrical portion) may be any spacing that allows for the formation of a space in the front portion of tip 40 where the contents can be stored by utilizing surface tension, and may be set arbitrarily depending on, for example, the type of contents. The amount of protrusion of the cylindrical portion may also be set to a length that prevents dripping when the contents are injected for, for example, about 5 seconds. [Industrial Applicability]

[0068] As described above, the present disclosure can be used, for example, in aerosol products for pest control. [Explanation of symbols]

[0069] 1. Aerosol products 2 aerosol caps 41 First cylindrical portion 41a First injection hole 42 Second cylindrical portion 42a Second injection hole 43 Third cylindrical section 43a Third injection hole 50 Drip prevention part

Claims

1. An aerosol cap attached to an aerosol container, The aerosol container has three or more spray holes for spraying the contents thereof, The aerosol cap has a drip prevention portion provided between a first injection hole and a second injection hole located adjacent to the first injection hole, among the three or more injection holes.

2. The aerosol cap according to claim 1, a first cylindrical portion that forms the first injection hole and a second cylindrical portion that forms the second injection hole, the first cylindrical portion is provided at a radial distance from the second cylindrical portion, The aerosol cap, wherein the drip prevention portion is provided between the first cylindrical portion and the second cylindrical portion.

3. The aerosol cap according to claim 2, The aerosol cap, wherein the drip prevention portion is a reservoir portion in which the contents sprayed from the three or more spray holes are collected.

4. The aerosol cap according to claim 2, the three or more injection holes include the first injection hole, the second injection hole, a third injection hole, and a fourth injection hole, a third cylindrical portion that forms the third injection hole and a fourth cylindrical portion that forms the fourth injection hole, the first cylindrical portion, the second cylindrical portion, the third cylindrical portion, and the fourth cylindrical portion are disposed at intervals from one another in the radial direction so that a rectangle formed by connecting a radial center of the first cylindrical portion, a radial center of the second cylindrical portion, a radial center of the third cylindrical portion, and a radial center of the fourth cylindrical portion is a square; the drip prevention portion is formed by a space surrounded by the first cylindrical portion, the second cylindrical portion, the third cylindrical portion, and the fourth cylindrical portion, The aerosol cap, wherein the drip prevention portion is a reservoir portion in which the contents sprayed from the three or more spray holes are collected.

5. The aerosol cap according to claim 1, The aerosol cap has an average particle diameter (D50) of spray particles at a distance of 50 cm from the spray hole of 120 μm or more and 140 μm or less.

6. An aerosol product comprising the aerosol cap according to any one of claims 1 to 5.

Images