WO2023013313A1 - 噴霧器 - Google Patents
噴霧器 Download PDFInfo
- Publication number
- WO2023013313A1 WO2023013313A1 PCT/JP2022/026018 JP2022026018W WO2023013313A1 WO 2023013313 A1 WO2023013313 A1 WO 2023013313A1 JP 2022026018 W JP2022026018 W JP 2022026018W WO 2023013313 A1 WO2023013313 A1 WO 2023013313A1
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- WO
- WIPO (PCT)
- Prior art keywords
- nozzle
- sub
- section
- cross
- core
- Prior art date
Links
- 239000007788 liquid Substances 0.000 claims abstract description 100
- 238000004891 communication Methods 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 239000007921 spray Substances 0.000 claims description 65
- 239000006199 nebulizer Substances 0.000 claims description 25
- 238000013459 approach Methods 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 5
- 238000005507 spraying Methods 0.000 abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000000463 material Substances 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- -1 polypropylene Polymers 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229920000092 linear low density polyethylene Polymers 0.000 description 4
- 239000004707 linear low-density polyethylene Substances 0.000 description 4
- 229920001684 low density polyethylene Polymers 0.000 description 4
- 239000004702 low-density polyethylene Substances 0.000 description 4
- 210000003928 nasal cavity Anatomy 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 210000003128 head Anatomy 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 229930182556 Polyacetal Natural products 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920006124 polyolefin elastomer Polymers 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 239000003708 ampul Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229940071643 prefilled syringe Drugs 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M15/00—Inhalators
- A61M15/08—Inhaling devices inserted into the nose
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
- A61M11/006—Sprayers or atomisers specially adapted for therapeutic purposes operated by applying mechanical pressure to the liquid to be sprayed or atomised
- A61M11/007—Syringe-type or piston-type sprayers or atomisers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M15/00—Inhalators
- A61M15/0001—Details of inhalators; Constructional features thereof
- A61M15/0021—Mouthpieces therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/06—Respiratory or anaesthetic masks
- A61M16/0666—Nasal cannulas or tubing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/02—General characteristics of the apparatus characterised by a particular materials
- A61M2205/0216—Materials providing elastic properties, e.g. for facilitating deformation and avoid breaking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
Definitions
- the present invention relates to a sprayer that sprays liquid into the nasal cavity.
- Patent Literature 1 discloses a nasal sprayer that is connected to a container that contains liquid and simultaneously discharges liquid into each nasal cavity from two nozzle cylinders.
- the nasal sprayer has a button, a cap-like push attached to the button, and a tubular stem connected to the push for fluid communication of liquid.
- the button has a flat plate portion, two nozzle cylinders erected upward on the plate portion, and a downward cylinder portion provided downward from the plate portion. The push fits into the downward barrel of the button. This creates a space between the plate of the button and the top of the push through which the liquid passes during ejection.
- the plate portion of the button is provided with two communication holes for fluid communication between the space and the inside of each nozzle cylinder. That is, the two communication holes are provided inside the downward cylinder portion of the button when viewed along the axial direction of the nozzle cylinder.
- the liquid is supplied to the space through the stem, enters the interior of each nozzle cylinder through each communication hole, and is jetted from the nozzle provided at the tip of each nozzle cylinder.
- a sprayer having one stem and two nozzle cylinders like the nasal injector described above, has a substantially Y shape when viewed in the radial direction of the nozzle cylinders.
- a nozzle-side part e.g., the above-described button
- a container-side part e.g., the above-described push
- an object of the present invention is to solve the above problems and to provide a sprayer in which leakage of liquid is suppressed.
- a nebulizer comprises: A sprayer comprising a nozzle inserted into a nostril and an adapter connecting the nozzle and a container containing a liquid,
- the nozzle has at least one sub-nozzle having a distal end that is provided with a spray hole and is inserted into the nostril, and a proximal end
- the adapter is a connecting tube having a connecting end connected to the container and in fluid communication; two core portions extending along the axial direction in which the connecting pipe extends and having different axes from the connecting pipe in a radial direction intersecting the axial direction and arranged in parallel; a U-shaped and annular receiving portion provided on the outer side surface and the base end portion of each core portion and opening toward the tip portion of each core portion; has each receiving portion is provided with a hole in fluid communication with the connecting tube; the nozzle is attached to the adapter such that at least one of the two core portions is arranged inside the sub-nozzle, and a base end portion of the sub-nozzle is
- FIG. 1 is a perspective view of a sprayer 1 and a syringe 9 according to an embodiment of the invention
- FIG. Fig. 2 is an exploded perspective view of the sprayer 1 and syringe 9 of Fig. 1;
- 2 is a perspective view of the sprayer 1 of FIG. 1;
- FIG. 2 is a plan view of the sprayer 1 of FIG. 1;
- FIG. 5 is a VV line end view of the sprayer 1 of FIG. 4.
- FIG. Figure 3 is a bottom view of the nozzle 2 of Figure 2;
- Figure 3 is a perspective view of the rod 3 of Figure 2;
- Fig. 3 is a perspective view of the adapter 4 of Fig. 2;
- 3 is a plan view of the adapter 4 of FIG. 2;
- FIG. FIG. 1 is a perspective view of a sprayer 1 and a syringe 9 according to an embodiment of the invention
- FIG. Fig. 2 is an exploded perspective view of the sprayer 1 and
- FIG. 6 is a partially enlarged view of a receiving portion 45 in FIG. 5; FIG. 6 is a partially enlarged view of a region Z1 in FIG. 5; 3 is a side view of the stopper 5 of FIG. 2; FIG. 5 is a VV line end view of the sprayer 1 of FIG. 4.
- FIG. 14 is a cross-sectional view of the sprayer 1 of FIG. 13 taken along line XIV-XIV; FIG. 14 is a cross-sectional view of the sprayer 1 of FIG. 13 taken along line XV-XV; FIG. 14 is a cross-sectional view taken along line XVI-XVI of the sprayer 1 of FIG. 13; FIG. 14 is a cross-sectional view of the nebulizer 1 of FIG.
- FIG. 12 is a partially enlarged view corresponding to FIG. 11 of the sprayer 1 according to the first modified example of the embodiment of the invention
- FIG. 12 is a partially enlarged view corresponding to FIG. 11 of the sprayer 1 according to a second modified example of the embodiment of the invention
- It is a perspective view of 1 A of sprayers based on the 3rd modification of embodiment of this invention.
- 22 is a perspective view of a tip 28 in the sprayer 1A of FIG. 21; FIG. FIG.
- FIG. 22 is a cross-sectional view taken along line XXIII-XXIII of the sprayer 1A of FIG. 21;
- FIG. 24 is a cross-sectional view taken along line XXIV-XXIV of the sprayer 1A of FIG. 23;
- FIG. 24 is a cross-sectional view taken along line XXV-XXV of the sprayer 1A of FIG. 23;
- a sprayer comprising a nozzle inserted into a nostril and an adapter connecting the nozzle and a container containing a liquid
- the nozzle has at least one sub-nozzle having a distal end that is provided with a spray hole and is inserted into the nostril, and a proximal end
- the adapter is a connecting tube having a connecting end connected to the container and in fluid communication; two core portions extending along the axial direction in which the connecting pipe extends and having different axes from the connecting pipe in a radial direction intersecting the axial direction and arranged in parallel; a U-shaped and annular receiving portion provided on the outer side surface and the base end portion of each core portion and opening toward the tip portion of each core portion; has each receiving portion is provided with a hole in fluid communication with the connecting tube; the nozzle is attached to the adapter such that at least one of the two core portions is arranged inside the sub-nozzle, and a base end portion of the sub-nozzle is inserted into the receiving portion;
- At least one of the contact portions between the outer surface of each sub-nozzle and the opposing surface of each receiving portion is a perfect circle or a substantially perfect circle in a cross section that intersects with the axial direction.
- the sprayer according to the first aspect is provided, wherein the contact portion is formed between the connecting pipe and the spray hole in the axial direction.
- the facing surface of the receiving portion is inclined away from the outer side surface of the core portion as it approaches the opening of the receiving portion in the axial direction,
- the facing surface of the receiving portion and the outer surface of the sub-nozzle are in linear contact at the contact portion.
- the receiving portion has an annular protrusion projecting outward from an outer surface that constitutes the back side of the facing surface
- the nozzle has a convex portion that protrudes toward the surface facing the receiving portion in the attached state, In the attached state, the convex portion of the nozzle is arranged further from the spray hole than the projection of the receiving portion in the axial direction, and is in contact with the projection of the receiving portion.
- the nozzle has two sub-nozzles, Each core is arranged inside each sub-nozzle in the attached state, In the attached state, both of the two contact portions are perfect circles or substantially perfect circles in a cross section that intersects the axial direction.
- a nebulizer according to any one of the first to fourth aspects is provided.
- a nebulizer according to the fifth aspect wherein in a plan view of the adapter, the profile of each core is formed by the proximal end of each core.
- a chamber forming at least part of each flow path is formed between the tip of each sub-nozzle and the tip of each core, In each channel, the channel cross-section of each chamber is larger than the channel cross-section of each core-side passage, A nebulizer according to the fifth or sixth aspect is provided.
- each sub-nozzle further comprising a rod disposed inside each sub-nozzle between the tip of each sub-nozzle and the tip of each core;
- Each chamber is formed between each rod and the tip of each sub-nozzle,
- a rod-side passage is formed between each rod and the inner side surface of each sub-nozzle,
- a nebulizer according to the seventh aspect is provided.
- the channel cross-section of the rod-side passage is smaller than the channel cross-section of the chamber.
- Each rod contacts the tip of each sub-nozzle, Between each rod and the tip of each sub-nozzle, a conduit is formed extending in a direction intersecting the axial direction and providing fluid communication between each rod-side passage and each spray hole.
- a nebulizer according to the eighth or ninth aspect is provided.
- the sprayer according to any one of the first to tenth aspects is provided, wherein in each channel, the channel cross-section of each core-side passage is smaller than the channel cross-section of each hole.
- the sprayer according to any one of the first to eleventh aspects, wherein the receiving portion has both a portion that overlaps with the connecting pipe and a portion that does not overlap with the connecting pipe in plan view of the adapter. offer.
- connection pipe is a large cross-sectional portion provided closer to the connecting end portion than the hole portion in the axial direction; a small cross-section portion provided closer to the connection end than the large cross-section portion in the axial direction and having a smaller cross section than the large cross-section portion in the axial direction; has further comprising a stopper arranged inside the connecting pipe, The stopper is configured to liquid-tightly contact the inner surface of the connection pipe at the small cross-section portion and to form a gap between the stopper and the inner surface of the connection pipe at the large cross-section portion, The stopper is configured to slide from the small cross-section portion to the large cross-section portion when pressed from the connecting end side in the axial direction by the liquid.
- a nebulizer according to any one of the first to twelfth aspects is provided.
- connection pipe has an enlarged portion provided between the large cross-section portion and the small cross-section portion, the cross section of which gradually expands in the axial direction as the small cross-section portion is approached along the axial direction.
- a nebulizer according to the thirteenth aspect is provided.
- connection pipe has a reduced portion provided between the expanded portion and the large cross-section portion, and having a cross section that gradually reduces in the axial direction as it moves away from the large cross-section portion along the axial direction. 14.
- a nebulizer according to aspect 14 is provided.
- FIG. 1 is a perspective view of a sprayer 1 and a syringe 9 according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view of the sprayer 1 and syringe 9 of FIG. 1 and 2, and FIGS. 3 to 6, 8 to 21, and 23 to 25, which will be described later, show X, Y, and Z axes orthogonal to each other for convenience of explanation.
- the positive direction of the Z-axis is also called “up” and the negative direction of the Z-axis is called "down”.
- these directional terms are not meant to limit the usage of the present invention.
- the nebulizer 1 is connected to a syringe 9 and used to nebulize liquid into two nostrils simultaneously.
- Syringe 9 is an example of a "container" in the present disclosure.
- the sprayer 1 includes a nozzle 2 inserted into the nostril, a rod 3 arranged inside the nozzle 2, an adapter 4 attached to the nozzle 2, and a stopper arranged inside the adapter 4. 5.
- FIG. 3 is a perspective view of the sprayer 1 of FIG.
- the nozzle 2 has two sub-nozzles 21 extending in parallel along the Z-axis and a base 22 connecting the two sub-nozzles 21 .
- the nozzle 2 is made of synthetic resin material such as polypropylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, polyacetal, and polybutylene terephthalate.
- the nozzle 2 may be integrally formed by injection molding.
- FIG. 4 is a plan view of the sprayer 1 of FIG. 1.
- FIG. FIG. 5 is a VV line end view of the sprayer 1 of FIG.
- FIG. 5 shows two virtual axes C1 and one virtual axis C2.
- Each virtual axis C1 passes through the central portion of each sub-nozzle 21 in the XY cross section.
- the virtual axis C2 passes through the central portion of the XY section of the connection pipe 41 of the adapter 4, which will be described later.
- the sprayer 1 has a line-symmetrical shape with respect to the virtual axis C2. That is, the two virtual axes C1 extend symmetrically with respect to the virtual axis C2.
- FIG. 5 only the parts provided on the left side of the imaginary axis C2 in the figure are denoted by reference numerals.
- the sub-nozzle 21 has a cylindrical shape and has a distal end portion 21a to be inserted into the nostril and a proximal end portion 21b on the opposite side.
- a tip portion 21a of the sub-nozzle 21 is closed except for a spray hole 23, which will be described later.
- the base end portion 21b of the sub-nozzle 21 is open.
- the sub-nozzle 21 has a shape extending in the axial direction of the corresponding virtual axis C1. That is, the virtual axis C1 extends along the Z-axis.
- each virtual axis C1 may be inclined at an angle of 0 to 15° with respect to the virtual axis C2 so as to move away from the virtual axis C2 as it progresses in the positive direction of the Z axis.
- the diameter of the sub-nozzle 21 decreases along the imaginary axis C1 as it approaches the tip portion 21a.
- a spray hole 23 for spraying liquid is provided in the center of the tip 21a of the sub-nozzle 21.
- the spray holes 23 are circular with a diameter of 300 ⁇ m when viewing the sub-nozzle 21 along the imaginary axis C1.
- the shape of the spray hole 23 is not limited to this, and may be circular with a diameter of 200 to 600 ⁇ m, for example, when the sub-nozzle 21 is viewed along the imaginary axis C1.
- FIG. 6 is a bottom view of the nozzle 2 of FIG.
- the inner surface of the tip portion 21 a of the sub-nozzle 21 is provided with a recess 24 formed in the center of the inner surface and three grooves 25 connected to the recess 24 .
- the recess 24 communicates with the outside of the nozzle 2 through the spray holes 23 .
- the concave portion 24 has a substantially truncated cone shape converging from the inner surface of the tip portion 21 a of the sub-nozzle 21 toward the spray hole 23 .
- the area of the cross section of the recess 24 orthogonal to the virtual axis C1 is larger than the area of the opening surface of the spray hole 23 .
- the groove 25 extends along the tangential direction of the circular recess 24 from the peripheral edge of the tip 21a of the sub-nozzle 21 in a bottom view of the sub-nozzle 21 viewed from below along the Z-axis.
- three grooves 25 are provided at intervals of 120° in the circumferential direction of the imaginary axis C1.
- the number of grooves 25 and the shape of each groove 25 in the bottom view of the sub-nozzle 21 are not limited to this.
- two grooves 25 or four or more grooves 25 may be arranged at regular intervals in the circumferential direction of the virtual axis C1.
- the radial inner side surface of the sub-nozzle 21 with respect to the corresponding virtual axis C1 constitutes an inner side surface 21c.
- the inner side surface 21c of the sub-nozzle 21 is provided with a protrusion 26 protruding toward the virtual axis C1.
- Protrusions 26 are used to attach rods 3 to sub-nozzles 21 .
- three protrusions 26 are provided at intervals of 120° in the circumferential direction of the imaginary axis C1.
- the number and shape of the projections 26 are not limited to this. For example, two or less or four or more protrusions 26 may be formed.
- the base portion 22 of the nozzle 2 is formed so as to cover the base end portions 21b of the two sub-nozzles 21. As shown in FIG. As shown in FIG. 5 , the base 22 branches off from the entire circumference of each sub-nozzle 21 and is integrated between the two sub-nozzles 21 . As shown in FIG. 6 , the base portion 22 has two lower edge portions 22a surrounding the base end portion 21b of each sub-nozzle 21 in the bottom view of the nozzle 2 .
- Each lower edge 22a has three protrusions 27 projecting inward toward the base end 21b of the sub-nozzle 21, respectively. Therefore, as shown in FIG. 6, the base 22 has a total of six protrusions 27. As shown in FIG. Protrusions 27 are used to attach nozzle 2 to adapter 4 .
- FIG. 7 is a perspective view of the rod 3 of FIG. 2.
- FIG. 7 shows the virtual axis C1 when the rod 3 is arranged inside the sub-nozzle 21.
- the rod 3 is assumed to be arranged inside the sub-nozzle 21 (see FIG. 5).
- the rod 3 has a bulging portion 31 projecting outward and extending along the imaginary axis C1 at the central portion in the axial direction of the imaginary axis C1.
- four bulging portions 31 are provided at intervals of 90° in the circumferential direction of the imaginary axis C1.
- the number and shape of the bulging portions 31 are not limited to the above. For example, three or less or five or more bulging portions 31 may be formed.
- the rod 3 has a barrel-like shape with a bulging central portion.
- Each bulging portion 31 has an inclined surface 31a that separates from the imaginary axis C1 as it approaches the tip portion 21a of the sub-nozzle 21 along the imaginary axis C1.
- grooves 32 that are recessed inwardly with respect to the bulging portions 31 and extend in the direction in which the rod 3 extends are formed between the bulging portions 31 .
- the rod 3 thus has four grooves 32 . Two of the four grooves 25 are shown in FIG.
- the rod 3 preferably has a symmetrical shape in the direction in which the rod 3 extends. That is, it is preferable that the upper and lower halves of the rod 3 are symmetrical. According to such a rod 3, when arranging the rod 3 inside the sub-nozzle 21, it is not necessary to consider the vertical direction of the rod 3, that is, which side of the rod 3 should be arranged upward. , the manufacture of the atomizer 1 can be facilitated.
- the rod 3 is formed by injection molding from a synthetic resin material such as polypropylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, polyacetal, and polybutylene terephthalate.
- a synthetic resin material such as polypropylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, polyacetal, and polybutylene terephthalate.
- FIG. 8 is a perspective view of the adapter 4 of FIG.
- the adapter 4 includes a connecting tube 41 connected to the syringe 9 , two cylindrical cores 42 connected to the connecting tube 41 , and circular cores 42 provided to surround the cores 42 . and a peripheral wall 43 .
- the adapter 4 is injection molded, for example, from a synthetic resin material such as polypropylene, high-density polyethylene, low-density polyethylene, or linear low-density polyethylene, a styrene-based elastomer material, an olefin-based elastomer material, or the like.
- connection pipe 41 has a cylindrical shape centered on the virtual axis C2. That is, the connection pipe 41 extends along the virtual axis C2 and the Z axis.
- the virtual axis C2 does not coincide with any of the virtual axes C1.
- the connecting tube 41 has a connecting end portion 41a connected to the syringe 9 and a communicating end portion 41b on the opposite side.
- a connection end portion 41a of the connection pipe 41 is open.
- the communicating end portion 41b of the connecting pipe 41 is closed by the closing portion 41e of the connecting pipe 41 except for the hole portion 451 of the receiving portion 45 which will be described later.
- connection pipe 41 and the two cores 42 are integrally formed.
- the connecting portion between the closed portion 41e of the connecting pipe 41 and the circumferential wall 43 constitutes the upper end of the connecting pipe 41 in the axial direction of the imaginary axis C2. That is, the connection pipe 41 has a length from the opening formed in the connection end portion 41a to the upper end in the axial direction of the imaginary axis C2.
- a two-dot chain line L1 shown in FIG. 5 and FIGS. 10 and 13 to be described later indicates the position of the upper end of the connection pipe 41 in the axial direction of the virtual axis C2.
- connection end portion 41a of the connection pipe 41 is provided with two connection projections 411 projecting in a direction away from the virtual axis C2.
- the two connection protrusions 411 are formed with an interval of 180° in the circumferential direction of the connection pipe 41 .
- a connecting protrusion 411 is used to connect the syringe 9 to the adapter 4 .
- the connection protrusion 411 has a shape complying with standards such as ISO80369-7.
- the number and shape of the connecting protrusions 411 are not limited to the above as long as the connecting tube 41 and the container such as the syringe 9 can be connected without leakage of liquid.
- the number and shape of the connection protrusions 411 may be the number and shape corresponding to the container such as the syringe 9 connected to the adapter 4 .
- the connection projection 411 may not be provided on the connection pipe 41 .
- the core portion 42 is arranged inside the sub-nozzle 21 in the attached state in which the nozzle 2 is attached to the adapter 4 .
- each core portion 42 is arranged coaxially with each virtual axis C1. Therefore, the two core portions 42 extend along each virtual axis C1 and are parallel to each other along the virtual axis C2.
- the core 42 has an upper distal end 42a and a lower proximal end 42b. Further, the core portion 42 has a cylindrical side surface portion 421 extending along the virtual axis C1 and a top surface portion 422 provided at the tip portion 42a. The top surface portion 422 is provided below the edge of the tip portion 42a of the core portion 42 in the axial direction of the virtual axis C1. Therefore, a recessed portion 44 surrounded by the side surface portion 421 and the top surface portion 422 is formed at the tip portion 42 a of the core portion 42 .
- two notch portions 421a are formed in the side surface portion 421 of the core portion 42.
- the cutout portion 421 a is formed so as to open in the radial direction of the core portion 42 with respect to the concave portion 44 .
- 9 is a plan view of the adapter 4 of FIG. 2.
- FIG. 9 only the parts provided on the left side of the imaginary axis C2 in the figure are denoted by reference numerals.
- the two cutouts 421a are formed, for example, at an interval of 180° from each other in the circumferential direction of the core 42 .
- the radial outer side surface of the side surface portion 421 with respect to the corresponding virtual axis C1 constitutes the outer side surface 42c of the core portion 42.
- a groove 46 extending between the base end portion 42b of the core portion 42 and the notch portion 421a is formed in the outer side surface 42c of the core portion 42 .
- two grooves 46 are formed with an interval of 180° from each other in the circumferential direction of the core portion 42 .
- the number and arrangement of grooves 46 are not limited to this.
- one or more grooves 46 may be formed in the circumferential direction of the imaginary axis C1. Further, the groove 46 may not be provided if a core portion side passage 65, which will be described later, is formed.
- the outline of the core portion 42 is formed by the base end portion 42b of the core portion 42 in a plan view of the adapter 4 viewed from above along the imaginary axis C2. That is, all portions of the core portion 42 are arranged inside the base end portion 42b of the core portion 42 in plan view of the adapter 4 .
- the circumferential wall 43 extends along the imaginary axis C1 and surrounds the base end portion 42b of the core portion 42 in plan view of the adapter 4 (see FIG. 9). are arranged as FIG. 10 is a partially enlarged view of the receiving portion 45 in FIG.
- the circumferential wall 43 is connected to the proximal end 42b of the corresponding core 42.
- an annular U-shaped receiving portion 45 that opens upward is formed.
- U-shaped is not limited to a U-shaped bottom portion curved, but also includes a U-shaped bottom portion formed with corners as shown in FIG.
- the receiving portion 45 refers to both the side portion 421 and the circumferential wall 43 of the core portion 42 and the annular and U-shaped space surrounded by them.
- a radial inner side surface of the circumferential wall 43 with respect to the corresponding virtual axis C1 constitutes a facing surface 43a that faces the outer side surface 42c of the core portion 42 .
- the facing surface 43a of the circumferential wall 43 is an example of the "facing surface of the receiving portion" in the present disclosure.
- the circumferential wall 43 moves away from the outer side surface 42c of the core portion 42 as it approaches the opening of the receiving portion 45 in the axial direction of the imaginary axis C1. inclined to That is, the receiving portion 45 has a groove shape that widens from the bottom toward the opening.
- the surface of the circumferential wall 43 opposite to the facing surface 43a constitutes the outer surface 43b of the circumferential wall 43.
- the outer surface 43b of the circumferential wall 43 is provided with an annular projection 431 projecting outward in the radial direction of the sub-nozzle 21.
- the projection 431 is formed near the bottom of the receiving portion 45 in the axial direction of the virtual axis C1.
- a protrusion 431 is used to connect the adapter 4 and the nozzle 2 .
- each core portion 42 is connected to the communicating end portion 41 b of the connecting pipe 41 .
- the core portion 42, the circumferential wall 43, and the receiving portion 45 are formed symmetrically with respect to the virtual axis C2.
- the dashed line in FIG. 9 indicates the outline of the connecting pipe 41.
- the connection pipe 41 overlaps a part of each circumferential wall 43 in plan view of the adapter 4 .
- the connecting tube 41 does not overlap the entire portion of each circumferential wall 43 . That is, each circumferential wall 43 has both a portion overlapping the connecting pipe 41 and a portion not overlapping the connecting pipe 41 in plan view of the adapter 4 .
- the connecting tube 41 also overlaps a portion of each receiving portion 45 and a portion of each core portion 42 .
- a hole portion 451 for fluid communication between the receiving portion 45 and the connecting pipe 41 is provided in the overlapping portion between each receiving portion 45 and the connecting pipe 41 .
- the hole portion 451 penetrates the bottom portion of the receiving portion 45 in the Z-axis direction.
- the hole portion 451 may pass through the circumferential wall 43 in the X-axis direction, for example.
- a recessed groove 452 extending from the hole 451 to the end of each groove 46 is provided at the bottom of the receiving portion 45 .
- the liquid that has passed through the hole 451 can easily flow through the receiving portion 45 in the circumferential direction of each imaginary axis C1.
- FIG. 11 is a partially enlarged view of area Z1 in FIG.
- the connection pipe 41 has a large cross-section portion (large diameter portion) 412 provided closer to the connection end portion 41a (lower side in FIG. 11) than the two holes 451, and a large cross-section portion 412. and a small cross-sectional portion (small diameter portion) 413 provided on the side of the connection end portion 41a.
- the inner diameter of the small cross-section portion 413 is smaller than the inner diameter of the large cross-section portion 412 .
- the XY cross-sectional area of the small cross-sectional portion 413 is smaller than the XY cross-sectional area of the large cross-sectional portion 412 . That is, when viewed from the Z-axis direction, the area of the XY plane surrounded by the small cross-sectional portion 413 is smaller than the area of the XY plane surrounded by the large cross-sectional portion 412 .
- connection pipe 41 has an enlarged portion 414 between the large cross-section portion 412 and the small cross-section portion 413 .
- the inner diameter and the XY cross section of the connection pipe 41 gradually increase as the large cross section portion 412 is approached along the Z axis direction.
- the axially inner inner surface 41c of the connection pipe 41 is inclined in the enlarged portion 414 in a direction away from the virtual axis C2 as it approaches the large cross-section portion 412 .
- connection pipe 41 has an outward recessed portion 416 above the large cross-section portion 412 .
- the recesses 416 are formed below the hole portions 451 (see FIG. 5) of the receiving portion 45 in the axial direction of the virtual axis C2.
- the concave portion 416 extends from the hole portion 451 toward the connection end portion 41a of the connection pipe 41 along the virtual axis C2, for example.
- a substantially cylindrical stopper 5 extending along the virtual axis C2 is arranged inside the connecting pipe 41 .
- the stopper 5 is arranged coaxially with the virtual axis C2. In the following description, it is assumed that the stopper 5 is arranged inside the connection pipe 41 .
- FIG. 12 is a side view of the stopper 5 of FIG. 2.
- FIG. FIG. 12 shows the X-, Y-, and Z-axes corresponding to the stopper 5 inside the connecting pipe 41, as well as the virtual axis C2.
- the stopper 5 has a small diameter portion 51 with a reduced diameter.
- a water stop portion 52 having a diameter larger than that of the small diameter portion 51 is provided closer to the communicating end portion 41 b of the connection pipe 41 than the small diameter portion 51 of the stopper 5 (lower side in FIG. 12 ).
- the water stop portion 52 of the stopper 5 is in liquid-tight contact with the inner surface 41c of the connection pipe 41 over the entire circumference.
- the stopper 5 has four projecting portions 53 projecting outward and extending along the virtual axis C2 on the side closer to the connecting end portion 41a of the connecting tube 41 than the small diameter portion 51. is provided.
- the four protrusions 53 are arranged at intervals of 90° in the circumferential direction of the stopper 5 .
- three of the four protrusions 53 are shown.
- the projecting portion 53 contacts the inner surface 41 c at the small cross-sectional portion 413 of the connecting pipe 41 .
- Four grooves 54 that are recessed inwardly with respect to the protrusions 53 and extend along the imaginary axis C2 are formed between the protrusions 53 adjacent in the circumferential direction. Two of the four grooves 54 are shown in FIG.
- the stopper 5 is formed with a recessed portion 55 recessed toward the connecting end portion 41a along the imaginary axis C2.
- the stopper 5 is made of, for example, a synthetic resin material such as polypropylene, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, a styrene-based elastomer material, an olefin-based elastomer material, synthetic rubber, or the like.
- the stopper 5 is formed by injection molding.
- the syringe 9 connected to the sprayer 1 may be conventionally known.
- the syringe 9 includes a tubular outer cylinder 91, a tubular connector 92 provided at the distal end portion 91a of the outer cylinder 91, and a plunger 93 inserted into the outer cylinder 91.
- a gasket 94 is provided at the end of the plunger 93 that is inserted into the outer cylinder 91 .
- the inner surface of the connector 92 is formed with a spiral groove (not shown) for screwing the nebulizer 1 and instruments such as an injection needle.
- the groove has a shape conforming to standards such as ISO80369-7, for example.
- the gasket 94 slides inside the outer cylinder 91 together with the plunger 93 while in liquid-tight contact with the inner surface of the outer cylinder 91 . By pushing the plunger 93 toward the tip 91a of the outer cylinder 91, the liquid held inside the outer cylinder 91 can be discharged from the tip 91a.
- the rod 3 is arranged inside each sub-nozzle 21 with the bulging portion 31 in contact with the projection 26 of the sub-nozzle 21 . More specifically, the inclined surface 31a of the bulging portion 31 is in contact with the tip portion 21a side of the protrusion 26 rather than the top portion thereof. Due to this contact, the rod 3 is urged toward the tip portion 21a of the sub-nozzle 21 along the virtual axis C1. This allows the rod 3 to more reliably contact the tip 21 a of the sub-nozzle 21 .
- a spray chamber 61 fluidly communicating with the spray hole 23 is formed between the recess 24 of the sub-nozzle 21 and the rod 3 .
- a conduit 62 is formed for fluid communication with the spray chamber 61 .
- a rod-side passage 63 is formed between the inner side surface 21 c of the sub-nozzle 21 and the rod 3 so as to be in fluid communication with the conduit 62 .
- the groove 32 of the rod 3 may form part of the rod-side passage 63 .
- the adapter 4 is attached to the nozzle 2 with each core 42 inserted into each sub-nozzle 21 .
- the base end portion 21 b of the sub-nozzle 21 is inserted into the receiving portion 45 .
- the base end portion 21 b of the sub-nozzle 21 is in contact with the bottom portion of the receiving portion 45 .
- the outer surface 21 d of the sub-nozzle 21 is in liquid-tight contact with the opposing surface 43 a of the circumferential wall 43 . That is, the contact portion 66 is formed by the outer surface 21 d of the sub-nozzle 21 and the facing surface 43 a of the circumferential wall 43 .
- the outer surface 21d of the sub-nozzle 21 is formed with an annular corner portion 212 extending over the entire circumference of the sub-nozzle 21 and facing the facing surface 43a of the circumferential wall 43.
- the corner portion 212 is formed above the connection pipe 41 in the axial direction of the virtual axis C2 (that is, the Z-axis direction).
- the position of the upper end of the connection pipe 41 in the axial direction of the virtual axis C2 is indicated by a chain double-dashed line L1.
- the contact portion 66 is provided above the connection pipe 41 in the axial direction of the imaginary axis C2 and is formed linearly along the entire circumference of the receiving portion 45 .
- the contact portion 66 may be formed in a planar shape, but is preferably formed in a linear shape as in the present embodiment.
- the base end portion 21b of the sub-nozzle 21 and the circumferential wall 43 are in contact with each other at the contact portion 66, so that they are inclined away from each other in the radial direction of the virtual axis C1. That is, the base end portion 21b of the sub-nozzle 21 is inclined so as to approach the imaginary axis C1 in the negative direction of the Z-axis. Also, the circumferential wall 43 is inclined away from the imaginary axis C1 as it progresses in the positive direction of the Z axis. In addition, when the base end portion 21b of the sub-nozzle 21 and the circumferential wall 43 come into contact with each other, only one of them may be inclined, or neither of them may be inclined.
- the projection 431 of the circumferential wall 43 is arranged closer to the spray hole 23 than the lower edge 22a of the nozzle 2 in the axial direction of the imaginary axis C1, and is in contact with the projection 27 of the nozzle 2. This contact prevents the nozzle 2 from being unintentionally removed from the adapter 4 . As a result, the attachment state of the adapter 4 to the nozzle 2 is maintained.
- a portion of the rod 3 is accommodated in the concave portion 44 of the adapter 4 .
- a chamber 64 communicating with the rod-side passage 63 is formed between the rod 3 and the tip portion 42 a of the core portion 42 .
- the concave portion 44 may form part of the chamber 64 if the rod 3 does not contact the bottom of the concave portion 44 , ie, the top surface portion 422 of the core portion 42 (see FIG. 5).
- a core side passage 65 is formed for fluidly connecting the chamber 64 and the hole portion 451 .
- the core side passage 65 and the outside thereof are partitioned liquid-tightly by a contact portion 66 .
- the sprayer 1 is formed with a channel having the hole 451, the core side passage 65, the chamber 64, the rod side passage 63, the conduit 62, the spray chamber 61, and the spray hole 23. be done.
- the inside of the syringe 9 is filled with the liquid to be sprayed.
- the connector 92 of the syringe 9 has a shape complying with the ISO80369-7 standard
- the connector 92 can be connected to a device such as an injection needle or a tube complying with the standard. Therefore, the liquid can be drawn up from a liquid container such as a vial or an ampoule through an injection needle or the like connected to the connector 92 to fill the syringe 9 with the liquid.
- a prefilled syringe prefilled with liquid can be used as the syringe 9, a prefilled syringe prefilled with liquid can be used.
- connection projection 411 of the connection tube 41 is screwed into the connector 92 of the syringe 9 to connect the sprayer 1 and the syringe 9 (see FIG. 1).
- the plunger 93 of the syringe 9 is pushed toward the tip portion 91 a of the outer cylinder 91 . Below, it demonstrates as what continues pushing in the plunger 93 until spraying is complete
- the stopper 5 When the plunger 93 is further pushed in, the stopper 5 is pushed by a force exceeding the maximum static frictional force against the inner surface 41c of the connecting pipe 41, and begins to slide toward the communicating end 41b of the connecting pipe 41.
- the amount of force that needs to be applied to the liquid to start sliding the stopper 5 is equal to or greater than the amount of force that needs to be applied to the liquid to effect the atomization.
- the stopper 5 starts to slide, it is pressed by the plunger 93 through the liquid and is also pressed by the repulsive force of the compressed air, and is rapidly accelerated. Furthermore, when the water stop portion 52 of the stopper 5 reaches the enlarged portion 414 of the connection pipe 41 , the stopper 5 is moved to the communicating end portion of the connection pipe 41 by the contact between the water stop portion 52 and the inclined inner surface 41 c of the connection pipe 41 . 41b is pushed further. Therefore, the stopper 5 accelerates further.
- FIG. 13 is a VV line end view of the sprayer 1 of FIG. In FIG. 13, only the parts provided on the left side of the imaginary axis C2 in the figure are denoted by reference numerals. Unlike FIG. 5 , FIG. 13 shows the stopper 5 arranged in the large cross-section portion 412 of the connecting pipe 41 .
- FIG. 14 is a XIV-XIV line sectional view of the sprayer 1 of FIG. A circular dashed line in FIG.
- the liquid passes through the hole 451 in the axial direction of the virtual axis C2 and enters the core side passage 65 and the gap between the outer surface 21d of the sub-nozzle 21 and the opposing surface 43a of the circumferential wall 43. do.
- the liquid fills each core-side passage 65 in the circumferential direction of the sub-nozzles 21 and flows through each core-side passage 65 toward the spray holes 23 in the axial direction of each imaginary axis C1.
- FIG. 15 is a cross-sectional view of the sprayer 1 of FIG. 13 taken along line XV-XV. That is, FIG. 15 shows a cross section of the sprayer 1 taken near the opening of the receiving portion 45 (see FIG. 13) in the axial direction of the imaginary axis C2.
- the outer surface 21d of the sub-nozzle 21 and the opposing surface 43a of the circumferential wall 43 are in liquid-tight contact over the entire circumference. That is, the contact portion 66 is formed by the outer surface 21 d of the sub-nozzle 21 and the facing surface 43 a of the circumferential wall 43 .
- the contact portion 66 is a perfect circle or a substantially perfect circle in a cross section that intersects the imaginary axis C2.
- the circularity of the cross section of the contact portion 66 is preferably 0.1 times or less, more preferably 0.05 times or less, and still more preferably 0.025 times or less.
- roundness is an index representing the degree of deviation of a circle to be measured from a geometrically correct circle.
- roundness is defined as the difference between the radii of two concentric, geometrically correct circles when the distance between the two circles is the smallest. Obtained by measurement.
- Circularity is expressed herein as a ratio of the difference in said radius to the radius of the smaller of the two circles. For example, if the smaller of the two circles has a radius of 4 mm, the difference is preferably 0.4 mm or less, more preferably 0.2 mm or less, even more preferably 0.1 mm or less.
- the flatness of the cross section of the contact portion 66 is preferably 1/6 or less, more preferably 1/12 or less, and still more preferably 1/24 or less.
- the "flatness” is expressed by (ab)/a, where a is the major axis of the ellipse and b is the minor axis.
- the outer surface 21d of the sub-nozzle 21 is a perfect circle or substantially a perfect circle in a cross section that intersects the imaginary axis C2 and passes through the portion corresponding to the contact portion 66 of the sub-nozzle 21.
- the circularity of the cross section of the outer surface 21d of the sub-nozzle 21 is preferably 0.1 times or less, more preferably 0.05 times or less, and still more preferably 0.025 times or less.
- the oblateness of the cross section of the outer surface 21d of the sub-nozzle 21 is preferably 1/6 or less, more preferably 1/12 or less, and still more preferably 1/24 or less. According to the outer surface 21d of the sub-nozzle 21, it is possible to realize the contact portion 66 that is a perfect circle or a substantially perfect circle in the cross section that intersects the imaginary axis C2.
- the facing surface 43a of the circumferential wall 43 is a perfect circle or a substantially perfect circle in a cross section that intersects the imaginary axis C2 and passes through the portion corresponding to the contact portion 66 of the circumferential wall 43.
- the roundness of the cross section of the facing surface 43a of the circumferential wall 43 is preferably 0.1 times or less, more preferably 0.05 times or less, and even more preferably 0.025 times or less.
- the flatness of the cross section of the facing surface 43a of the circumferential wall 43 is preferably 1/6 or less, more preferably 1/12 or less, and still more preferably 1/24 or less. With such a facing surface 43a of the circumferential wall 43, it is possible to realize the contact portion 66 that is a perfect circle or a substantially perfect circle in a cross section that intersects the imaginary axis C2.
- each contact portion 66 is a perfect circle in a cross section perpendicular to the virtual axis C2, that is, in the XY cross section. As shown in FIG. 10 , the contact portion 66 liquid-tightly separates the gap between the sub-nozzle 21 and the circumferential wall 43 , that is, the space fluidly communicating with the core-side passage 65 and the outside thereof.
- the core-side passage 65 has a portion whose flow passage cross section is smaller than that of the hole portion 451 .
- the flow velocity of the liquid increases in that portion of the core side passage 65 , and the time required for the liquid to pass through the flow path from the hole 451 to the spray hole 23 is shortened. That is, the time from when the water stop portion 52 of the stopper 5 separates from the inner surface 41c of the connecting pipe 41 to when the liquid starts to be sprayed from the spray hole 23 is shortened. Therefore, operability during spraying can be improved.
- one cross section/opening surface is larger/smaller than another cross section means that the area, diameter, and/or perimeter of the one cross section/opening surface is equal to the other cross section/opening surface. means larger/smaller than the corresponding area, diameter, and/or perimeter of the .
- the cross section of the plurality of the passage or the like when a plurality of the passage or the like is provided in each flow channel, the cross section of the plurality of the passage or the like / It is intended that comparisons be made using the total aperture size.
- channel cross section refers to a cross section of the channel that is perpendicular to the direction in which the liquid flows.
- the liquid flows through the hole 451 along the imaginary axis C2, so the channel cross section of the hole 451 can also be said to be a cross section intersecting the imaginary axis C2.
- the core side passage 65 extends along the virtual axis C2. That is, the liquid flows through the core-side passage 65 along the imaginary axis C2. Therefore, the channel cross section of the core side passage 65 can also be said to be a cross section that intersects the virtual axis C2.
- FIG. 16 is a cross-sectional view of the sprayer 1 of FIG. 13 taken along line XVI-XVI. As shown in FIG. 16, after passing through the core-side passage 65, the liquid enters the concave portion 44, ie, the chamber 64, through the notch 421a.
- the chamber 64 has a portion whose passage cross section is larger than that of the core side passage 65 .
- the liquid flows through the chamber 64 along the imaginary axis C1, so the channel cross section of the chamber 64 can also be said to be a cross section intersecting the imaginary axis C1.
- the channel cross section of the chamber 64 can also be said to be a cross section intersecting the virtual axis C2.
- FIG. 17 is a cross-sectional view of the sprayer 1 of FIG. 13 taken along line XVII-XVII.
- the liquid enters rod-side passage 63 after passing through chamber 64 .
- the rod-side passage 63 has a portion whose passage cross section is smaller than the passage cross section of the chamber 64 .
- the rod-side passage 63 extends along the virtual axis C1 and each virtual axis C2. That is, the liquid flows through the rod-side passage 63 along the virtual axis C1 and each virtual axis C2. Therefore, the channel cross section of the chamber 64 can also be said to be a cross section that intersects the imaginary axis C1 or each imaginary axis C2.
- FIG. 18 is a cross-sectional view of the atomizer 1 of FIG. 13 taken along line XVIII-XVIII.
- the liquid enters the conduit 62 after passing through the rod-side passage 63 .
- the conducting passage 62 has a portion whose passage cross section is smaller than the passage cross section of the rod side passage 63 .
- the liquid can be accelerated when flowing from the rod-side passage 63 to the conduit 62 . Therefore, compared with the configuration in which the flow passage cross section of the conduit 62 is larger than the flow passage cross section of the rod-side passage 63 , the flow velocity required for spraying can be easily obtained in the spray holes 23 .
- the conduction path 62 extends radially with respect to each virtual axis C1. That is, the liquid flows through the conduit 62 in the radial direction with respect to each virtual axis C1. Therefore, the channel cross section of the chamber 64 can also be said to be a cross section with respect to the radial direction of the imaginary axis C1.
- the liquid that has passed through the conduit 62 enters the spray chamber 61 .
- the conduction path 62 opens along the circumferential direction of the spray chamber 61 with respect to the spray chamber 61 . Therefore, the liquid forms a spiral flow in the spray chamber 61 and is atomized.
- the atomized liquid is sprayed into the nostril into which the sub-nozzle 21 is inserted through the spray hole 23 (see FIG. 4).
- the opening surface of the spray hole 23 is smaller than the channel cross section of the channel. In this embodiment, the opening surface of the spray hole 23 is smaller than the passage cross-sections of the conduit 62 , the rod-side passage 63 , the chamber 64 , the core-side passage 65 , and the hole portion 451 .
- the syringe 9 is exemplified above as a container connected to the sprayer 1, it is not limited to this.
- the nebulizer 1 may be connected to a pump container (for example, a nasal pump, etc.) having a mechanism for delivering compressed liquid.
- the stopper 5 may not be provided since the liquid can be compressed in the container.
- the sprayer 1 includes the nozzle 2 to be inserted into the nostril, and the adapter 4 for connecting the nozzle 2 and the syringe 9 containing the liquid.
- the nozzle 2 has at least one sub-nozzle 21 having a distal end portion 21a provided with a spray hole 23 and inserted into the nostril, and a proximal end portion 21b.
- the adapter 4 has a connecting end portion 41a that is connected to the syringe 9 and extends along the axial direction of the connecting tube 41 that is in fluid communication with the connecting tube 41 that is in fluid communication with the connecting tube 41a.
- Each receiving portion 45 is provided with a hole portion 451 in fluid communication with the connecting tube 41 .
- the nozzle 2 is attached to the adapter 4 such that at least one of the two core portions 42 is arranged inside the sub-nozzle 21 and the base end portion 21 b of the sub-nozzle 21 is inserted into the receiving portion 45 .
- a core-side passage 65 is formed that fluidly communicates with the connecting pipe 41 through the hole 451 .
- the core-side passage 65 constitutes at least part of the flow path from the hole 451 to the spray holes 23 .
- the outer surface 21d of the sub-nozzle 21 and the opposing surface 43a of the circumferential wall 43 facing the outer surface 21d are liquid-tight to separate the core passage 65 from the outside. in contact.
- at least one of the contact portions 66 between the outer surface 21d of each sub-nozzle 21 and the opposing surface 43a of each circumferential wall 43 is a perfect circle or substantially a perfect circle in a cross section intersecting the axial direction.
- At least one of the contact portions 66 between the outer surface 21d of the sub-nozzle 21 and the opposing surface 43a of the circumferential wall 43 is a perfect circle or a substantially perfect circle in a cross section that intersects with the axial direction.
- a configuration can be adopted in which a sealing part such as a packing or an O-ring is sandwiched between the two parts.
- a sealing part such as a packing or an O-ring
- two contacts are formed between the two parts and the sealing part.
- the sub-nozzle 21 and the circumferential wall 43 are in contact with each other without a sealing component interposed therebetween. That is, only one contact portion 66 is formed between the sub-nozzle 21 and the circumferential wall 43 .
- the contact portion 66 is formed between the connection pipe 41 and the spray hole 23 in the axial direction. That is, the contact portion 66 is formed above the connection pipe 41 in the Z-axis direction.
- a portion of the circumferential wall 43 that is parallel to the connecting pipe 41 in the Z-axis direction is formed integrally with the closing portion 41e of the connecting pipe 41, as shown in FIG. That is, at this portion, the wall thickness of the circumferential wall 43 in the cross section intersecting the axial direction is not constant or substantially constant.
- cylinders having different wall thicknesses are molded from plastic, dimensional accuracy tends to decrease due to uneven hardening of the plastic. That is, when the adapter 4 is molded from plastic, the roundness of the facing surface 43a of the circumferential wall 43 tends to be low in the cross section intersecting the axial direction.
- the portion of the circumferential wall 43 above the connecting pipe 41 in the Z-axis direction is not integrated with the connecting pipe 41 and has a constant or substantially constant thickness, as shown in FIG. Therefore, uneven hardening of the plastic is less likely to occur, and the roundness of the facing surface 43a of the circumferential wall 43 in the cross section intersecting the axial direction is less likely to decrease. That is, the contact portion 66 having a perfect circle or a substantially perfect circle in a cross section intersecting the axial direction can be formed more reliably. Therefore, it is possible to realize the sprayer 1 in which leakage of liquid is further suppressed.
- the facing surface 43a of the circumferential wall 43 in the attached state moves away from the outer side surface 42c of the core portion 42 as it approaches the opening of the receiving portion 45 in the axial direction of the imaginary axis C1. Inclined.
- the facing surface 43 a of the circumferential wall 43 and the outer surface 21 d of the sub-nozzle 21 are in linear contact at the contact portion 66 .
- the force with which the circumferential wall 43 and the sub-nozzle 21 press against each other is linear contact. Concentrate on section 66 .
- the contact pressure between the circumferential wall 43 and the sub-nozzle 21 at the contact portion 66 can be increased.
- the circumferential wall 43 presses the base end 21 b of the sub-nozzle 21 toward the core 42 via the contact portion 66 .
- the eccentricity between the sub-nozzle 21 and the circumferential wall 43 can be reduced. Therefore, the possibility of liquid leaking from the contact portion 66 can be reduced, and the sprayer 1 in which liquid leakage is further suppressed can be realized.
- the circumferential wall 43 has an annular protrusion 431 that protrudes outward from the outer surface 43b forming the back side of the facing surface 43a.
- the nozzle 2 has a protrusion 27 protruding toward the facing surface 43a of the circumferential wall 43 in the attached state. In the attached state, the projection 27 of the nozzle 2 is arranged further away from the spray hole 23 than the projection 431 of the circumferential wall 43 in the axial direction of the imaginary axis C1, and is in contact with the projection 431 of the circumferential wall 43. ing.
- the projection 27 of the nozzle 2 contacts the projection 431 of the circumferential wall 43 from below in the axial direction of the virtual axis C1.
- the protrusion 431 of the circumferential wall 43 functions as a retainer for the nozzle 2, so that the possibility of the nozzle 2 being unintentionally removed from the adapter 4 can be reduced.
- the sub-nozzle 21 is more stable than when the facing surface 43a of the circumferential wall 43 is not inclined. , easily move in a direction to escape from the receiving portion 45 . That is, the nozzle 2 is easily removed from the adapter 4 .
- the possibility that the nozzle 2 is unintentionally removed from the adapter 4 is reduced, so that the inclined facing surface 43a of the circumferential wall 43 can be realized.
- the nozzle 2 has two sub-nozzles 21 .
- Each core portion 42 is arranged inside the sub-nozzle 21 in the attached state.
- both of the two contact portions 66 are perfect circles or substantially perfect circles in cross sections intersecting the axial direction.
- each core 42 is formed by the base end 42b of each core 42 in plan view of the adapter 4 .
- the two sub-nozzles 21 are arranged in the axial direction of the virtual axis C2 with respect to the two core portions 42. can be covered along That is, there is no need to temporarily deform (for example, bend) the nozzle 2 in order to put each sub-nozzle 21 on each core 42 . Therefore, the nozzle 2 can be configured with low flexibility. Reducing the flexibility of the nozzles 2 makes it difficult for the sub-nozzles 21 to deform due to the pressure of the liquid. Therefore, it is possible to realize the sprayer 1 in which leakage of liquid is further suppressed.
- the protrusion 27 of the nozzle 2 and the protrusion 431 of the circumferential wall 43 form a stopper, as long as the protrusion 27 can climb over the protrusion 431 downward in the Z-axis direction when the nozzle 2 is attached, The flexibility of the nozzle 2 can be made low. Therefore, the above effects can be achieved.
- a chamber 64 that constitutes at least part of each flow path is provided inside each sub-nozzle 21 and between the tip 21a of each sub-nozzle 21 and the tip 42a of each core 42. is formed.
- the channel cross-section of each chamber 64 is larger than the channel cross-section of each core-side passage 65 .
- the flow channel cross section of the chamber 64 is larger than the flow channel cross section of the core side passage 65 , so that the liquid can be decelerated when flowing from the core side passage 65 to the chamber 64 . Therefore, when the head positions of the liquid flow are different in the two flow paths, the difference between the head positions can be shortened. As a result, the time difference between the start of spraying at both spray holes 23 is shortened, so that the deviation of the amount of spray from both spray holes 23 can be suppressed. Therefore, the liquid can be sprayed evenly into both nasal cavities.
- each rod 3 arranged between the tip 21a of each sub-nozzle 21 and the tip 42a of each core 42 is further provided inside each sub-nozzle 21 .
- Each chamber 64 is formed between each rod 3 and the tip 21 a of each sub-nozzle 21 .
- a rod-side passage 63 is formed between each rod 3 and the inner side surface 21 c of each sub-nozzle 21 .
- the chamber 64 can be formed between the tip 21 a of the sub-nozzle 21 and the tip 42 a of the core 42 . Further, since the rod-side passage 63 is formed, the liquid can be guided from the core-side passage 65 toward the spray holes 23 . Therefore, compared to a configuration in which the rod 3 is not provided, the liquid can be more stably supplied to the spray holes 23, so the stability of the liquid spray can be improved.
- the cross-section of the rod-side passage 63 is smaller than the cross-section of the chamber 64 in each channel.
- the flow passage cross section of the rod-side passage 63 closer to the spray hole 23 in the flow passage is smaller than the flow passage cross section of the chamber 64 . This allows the liquid to be accelerated as it flows from the chamber 64 to the rod-side passage 63 . Therefore, compared to a configuration in which the cross section of the rod-side passage 63 is larger than the cross section of the chamber 64 , the flow velocity necessary for spraying can be easily obtained in the spray holes 23 .
- each rod 3 has a bulging portion 31 protruding outward.
- Each sub-nozzle 21 has a protrusion 26 projecting inward from each inner side surface 21c.
- the projection 26 of each sub-nozzle 21 is arranged further away from each spray hole 23 than the bulging portion 31 of each rod 3 in the axial direction of each imaginary axis C1. contact with the outlet 31;
- Each rod 3 contacts the tip 21 a of each sub-nozzle 21 .
- a conduit 62 extending in a direction intersecting with the axial direction and fluidly connecting each rod-side passage 63 and each spray hole 23 is formed. .
- the rod 3 when the rod 3 is not provided and the conducting path 62 is formed between the tip portion 21a of the sub-nozzle 21 and the core portion 42 extending to the vicinity thereof, due to manufacturing tolerances of the adapter 4, the tip portion 21a of the sub-nozzle 21 and There is a possibility that an unintended gap may occur with the core portion 42 . If such a gap occurs, the flow area of the conduit 62 will increase, and the flow velocity of the liquid in the conduit 62 will decrease. On the other hand, according to the above configuration, the rod 3 contacts the projection 26 of the sub-nozzle 21 and the tip 21 a of the sub-nozzle 21 to form the conducting path 62 .
- the channel cross section of each core side passage 65 is smaller than the channel cross section of each hole 451 in each channel.
- the channel cross section of the core side passage 65 is smaller than the channel cross section of the hole 451 .
- the flow velocity in the core-side passage 65 can be increased compared to a configuration in which the flow-path cross-section of the core-side passage 65 is larger than the flow-path cross-section of the hole portion 451 .
- the time required for the head of the liquid flow to pass through the channel is shortened, so the time difference between the start of pressing against the liquid and the start of spraying is shortened. Therefore, the sprayer 1 with improved operability during spraying can be realized.
- the receiving part 45 has both a portion overlapping the connecting pipe 41 and a portion not overlapping the connecting pipe 41 in plan view of the adapter 4 .
- the connecting end portion 41a of the connecting tube 41 preferably has a perfect circular or substantially perfect circular cross section in order to prevent the liquid from leaking from the connecting portion between the connecting tube 41 and the syringe 9.
- the connection pipe 41 configured in this way becomes large in the Y-axis direction when it overlaps with the entire portions of the two receiving portions 45 .
- the connecting tube 41 may interfere with the upper lip or the like, making it impossible to insert each sub-nozzle 21 into each nostril at an appropriate angle.
- the connecting pipe 41 overlaps only a part of each receiving portion 45 rather than the entire portion of the two receiving portions 45 in plan view of the adapter 4 .
- This makes it possible to reduce the size of the connecting pipe 41 in the Y-axis direction while realizing a perfect circular or substantially circular cross section over the entire length of the connecting pipe 41 . Therefore, it is possible to realize the nebulizer 1 in which leakage of liquid from the connecting portion between the connecting tube 41 and the syringe 9 is suppressed, and each sub-nozzle 21 can be inserted into each nostril at an appropriate angle.
- the diameter of the connecting pipe 41 is small, the amount of liquid remaining in the connecting pipe 41 after spraying and discarded can be reduced. Therefore, the atomizer 1 with high liquid usage efficiency can be realized.
- the connection pipe 41 includes a large cross-section portion 412 provided closer to the connection end portion 41a than the hole portion 451 in the axial direction, and a connection end closer to the large cross-section portion 412 in the axial direction.
- a small cross-section portion 413 provided on the portion 41a side and having a smaller cross section than the large cross-section portion 412 in the axial direction.
- the sprayer 1 further comprises a stopper 5 arranged inside the connecting tube 41 .
- the stopper 5 is configured to liquid-tightly contact the inner surface 41 c of the connection pipe 41 at the small cross-section portion 413 and form a gap with the inner surface 41 c of the connection pipe 41 at the large cross-section portion 412 .
- the stopper 5 is configured to slide from the small cross-section portion 413 to the large cross-section portion 412 when pressed from the connecting end portion 41a side in the axial direction by liquid.
- the stopper 5 once the stopper 5 starts to slide, it is pressed by the plunger 93 through the liquid and is also pressed by the repulsive force of the compressed air, so that it rapidly accelerates. That is, the time from when the stopper 5 and the plunger 93 pressing it starts to move to when the liquid starts to be sprayed is short.
- This makes it possible to apply sufficient force to the liquid to start sliding the stopper 5 even at the start of spraying. That is, even at the start of spraying, sufficient force can be applied to the liquid for spraying, and spraying of the liquid can be stabilized.
- connection pipe 41 is provided between the large cross-section portion 412 and the small cross-section portion 413, and the cross section in the axial direction gradually increases as it approaches the small cross-section portion 413 along the axial direction. It has an enlarged portion 414 that expands exponentially.
- the stopper 5 when the water stop portion 52 reaches the enlarged portion 414 of the connection pipe 41 , the stopper 5 is caused by contact between the water stop portion 52 and the inclined inner surface 41 d of the connection pipe 41 . It is pressed toward the communicating end 41b. As a result, the stopper 5 can be further accelerated, so the time from when the stopper 5 and the plunger 93 start to move to when the liquid starts to be sprayed can be further shortened. Therefore, even at the start of spraying, sufficient force can be applied to the liquid for spraying, and the spraying of the liquid can be made more stable.
- the shape of the nozzle 2 and the shape of the adapter 4 are symmetrical with respect to the axis of the connecting pipe 41 .
- FIG. 19 is a partially enlarged view corresponding to FIG. 11 of the sprayer according to the first modified example of the embodiment of the invention.
- the connecting tube 41A shown in FIG. 19 the small cross-sectional portion 413 and the recessed portion 416 are continuous in the axial direction of the virtual axis C2.
- a boundary portion between the small cross-sectional portion 413 and the concave portion 416 is formed in a stepped shape.
- the water stop portion 52 of the stopper 5 reaches the recess 416 of the connecting pipe 41 , the water stop portion 52 leaves the inner surface 41 c of the connecting pipe 41 .
- the compressed liquid enters the connecting pipe 41 closer to the communicating end 41 b (upper side in FIG. 19 ) than the water stop portion 52 of the stopper 5 .
- the time from when the stopper 5 and plunger 93 start to move to when the liquid starts to be sprayed can be shortened, as in the above-described embodiment. Therefore, even at the start of spraying, sufficient force can be applied to the liquid for spraying, and the spraying of the liquid can be made more stable. Further, according to the above configuration, it is not necessary to form the enlarged portion 414 having a surface inclined with respect to the virtual axis C2. It can be simplified.
- FIG. 20 is a partially enlarged view corresponding to FIG. 11 of a sprayer according to a second modification of the embodiment of the invention.
- the connecting tube 41B shown in FIG. The reduced portion 415 is provided between the enlarged portion 414 and the small cross-section portion 413 .
- the cross section of the connection pipe 41 in the axial direction gradually contracts as it approaches the enlarged portion 414 along the virtual axis C1.
- the connecting pipe 41 since the connecting pipe 41 has the reduced portion 415, the difference in cross-sectional area in the expanded portion 414 can be increased. Therefore, the stopper 5 can be pressed more strongly toward the communicating end portion 41 b of the connecting pipe 41 by the contact between the water stop portion 52 and the inclined inner surface 41 d of the connecting pipe 41 . As a result, the stopper 5 can be further accelerated, so the time from when the stopper 5 and the plunger 93 start to move to when the liquid starts to be sprayed can be further shortened. Therefore, even at the start of spraying, sufficient force can be applied to the liquid for spraying, and the spraying of the liquid can be made more stable.
- FIG. 21 is a perspective view of a sprayer 1A according to a third modification of the embodiment of the invention. Compared with the sprayer 1 shown in FIG. 3, the tip 21a of each sub-nozzle 21 is open in the sprayer 1A shown in FIG. A tip 28 is provided at the tip 21 a of each sub nozzle 21 .
- the tip 28 is a perspective view of the tip 28 in the sprayer 1A of FIG. 21.
- FIG. Below, for convenience of explanation, it is assumed that the rod 3 is arranged inside the sub-nozzle 21 .
- the tip 28 has a substantially cylindrical shape extending along the direction in which the sub-nozzle 21 extends, that is, along the axial direction of the virtual axis C1.
- the tip 28 has an annular projecting portion 281 formed in the central portion in the axial direction of the virtual axis C1.
- the protruding portion 281 protrudes outward and extends in the circumferential direction of the virtual axis C1.
- a protrusion 281 is used to attach the tip 28 to the sub-nozzle 21 .
- a spray hole 23 is formed in the tip 28 at the end on the tip 21a side of the sub-nozzle 21 in the axial direction of the virtual axis C1.
- the shape and size of the spray holes 23 may be, for example, the same as the spray holes 23 (see FIG. 4) in the above embodiment.
- FIG. 23 is a cross-sectional view taken along line XXIII-XXIII of sprayer 1A in FIG. That is, FIG. 23 is a partial cross-sectional view of the section showing the tip portion 21a of one of the sub-nozzles 21 cut parallel to the ZX plane and viewed in the Y direction. As shown in FIG. 23, an annular groove 211 is formed in the inner side surface 21c of the sub-nozzle 21. As shown in FIG. The tip 28 is inserted from the tip 21 a of the sub-nozzle 21 . At this time, the tip 28 is attached to the sub-nozzle 21 by fitting the projecting portion 281 of the tip 28 into the groove 211 of the sub-nozzle 21 .
- the rod 3A is accommodated inside the tip 28.
- a portion of rod 3A may be housed inside tip 28, as shown in FIG.
- a recess 24 and three grooves 25 connected to the recess 24 are formed on the inner surface of the chip 28 .
- One of the three grooves 25 is shown in FIG.
- the rod 3A is in contact with the inner surface of the tip 28 in the axial direction of the virtual axis C1.
- a spray chamber 61 communicating with the spray hole 23 is formed between the recess 24 of the tip 28 and the rod 3A.
- a conducting path 62 is formed between the groove 25 of the tip 28 and the rod 3A.
- the rod 3A has a projection 33 projecting toward the spray hole 23 along the imaginary axis C1.
- the rod 3A extends from the lower end of the rod 3A to the central portion in the axial direction of the virtual axis C1 and has a bulging portion 31 that protrudes outward.
- 24 is a cross-sectional view taken along line XXIV--XXIV of sprayer 1A of FIG. 23.
- the rod 3A has, for example, three bulges 31.
- grooves 32 are formed that are recessed with respect to the bulging portions 31 and extend along the axial direction of the imaginary axis C1.
- the bulging portion 31 of the rod 3A is in contact with the inner side surface 21c of the sub-nozzle 21.
- a part of the rod-side passage 63 is formed between the groove 32 of the rod 3A and the inner side surface 21c of the sub-nozzle 21, a part of the rod-side passage 63 is formed.
- FIG. 25 is a cross-sectional view taken along line XXV-XXV of the sprayer 1A of FIG. As shown in FIG. 25, the rod 3A partially contacts the inner surface of the tip 28. As shown in FIG. On the other hand, a part of the rod-side passage 63 is formed between the rod 3A and the tip 28 at the non-contact portion between the rod 3A and the tip 28 . Also in this modified example, the rod-side passage 63 has a portion whose passage cross section is smaller than the passage cross section of the chamber 64 .
- liquid leakage can be suppressed, so it is useful for various sprayers.
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Abstract
Description
鼻孔に挿入されるノズルと、前記ノズルと液体を収容する容器とを接続するアダプタとを備える噴霧器であって、
前記ノズルは、噴霧孔が設けられ前記鼻孔に挿入される先端部と、基端部とを有する少なくとも1つのサブノズルを有し、
前記アダプタは、
前記容器に接続される接続端部を有し、流体連通する接続管と、
前記接続管が延びる軸方向に沿って延びるとともに、前記軸方向に交差する径方向において、前記接続管と異なる軸を有し、並列に配置された2つの芯部と、
各芯部の外部側面かつ基端部に設けられ、各芯部の先端部に向かって開口するU字状かつ環状の受け部と、
を有し、
各受け部に、前記接続管に流体連通する穴部が設けられ、
前記ノズルは、前記サブノズルの内部に前記2つの芯部のうち少なくとも一方が配置され、かつ、前記サブノズルの基端部が前記受け部に挿入されるように、前記アダプタに取り付けられ、
前記サブノズルと前記芯部との間に、前記穴部を介して前記接続管に流体連通する芯部側通路が形成され、
前記芯部側通路は、前記穴部から前記噴霧孔に到達する流路の少なくとも一部を構成し、
前記ノズルが前記アダプタに取り付けられた取付状態において、前記サブノズルの外面と当該外面に対向する前記受け部の対向面とは、前記芯部側通路と外部とを区画するように液密に接触し、
前記取付状態において、各サブノズルの外面と各受け部の対向面との接触部のうち少なくとも1つは、前記軸方向に交差する断面において真円又は略真円である。
鼻孔に挿入されるノズルと、前記ノズルと液体を収容する容器とを接続するアダプタとを備える噴霧器であって、
前記ノズルは、噴霧孔が設けられ前記鼻孔に挿入される先端部と、基端部とを有する少なくとも1つのサブノズルを有し、
前記アダプタは、
前記容器に接続される接続端部を有し、流体連通する接続管と、
前記接続管が延びる軸方向に沿って延びるとともに、前記軸方向に交差する径方向において、前記接続管と異なる軸を有し、並列に配置された2つの芯部と、
各芯部の外部側面かつ基端部に設けられ、各芯部の先端部に向かって開口するU字状かつ環状の受け部と、
を有し、
各受け部に、前記接続管に流体連通する穴部が設けられ、
前記ノズルは、前記サブノズルの内部に前記2つの芯部のうち少なくとも一方が配置され、かつ、前記サブノズルの基端部が前記受け部に挿入されるように、前記アダプタに取り付けられ、
前記サブノズルと前記芯部との間に、前記穴部を介して前記接続管に流体連通する芯部側通路が形成され、
前記芯部側通路は、前記穴部から前記噴霧孔に到達する流路の少なくとも一部を構成し、
前記ノズルが前記アダプタに取り付けられた取付状態において、前記サブノズルの外面と当該外面に対向する前記受け部の対向面とは、前記芯部側通路と外部とを区画するように液密に接触し、
前記取付状態において、各サブノズルの外面と各受け部の対向面との接触部のうち少なくとも1つは、前記軸方向に交差する断面において真円又は略真円である、
噴霧器を提供する。
前記接触部は、前記軸方向において、前記接続管と前記噴霧孔との間に形成される、第1態様に記載の噴霧器を提供する。
前記受け部の対向面は、前記取付状態において、前記軸方向において前記受け部の開口に近づくに従って、前記芯部の外部側面から離れるように傾斜し、
前記受け部の対向面と前記サブノズルの外面とは、前記接触部で線状に接触する、
第1態様又は第2態様に記載の噴霧器を提供する。
前記受け部は、前記対向面の裏側を構成する外面から外向きに突出した環状の突起を有し、
前記ノズルは、前記取付状態において前記受け部の対向面に向かって突出した凸部を有し、
前記取付状態において、前記ノズルの凸部は、前記軸方向において前記受け部の突起よりも前記噴霧孔から離れた方に配置され、かつ、前記受け部の突起に接触している、
第1~第3態様のいずれか1つに記載の噴霧器を提供する。
前記ノズルは、2つの前記サブノズルを有し、
各芯部は、前記取付状態において各サブノズルの内部に配置され、
前記取付状態において、2つの前記接触部は、前記軸方向に交差する断面においていずれも真円又は略真円である、
第1~第4態様のいずれか1つに記載の噴霧器を提供する。
前記アダプタの平面視において、各芯部の輪郭は、各芯部の基端部によって形成される、第5態様に記載の噴霧器を提供する。
各サブノズルの内部において、各サブノズルの先端部と各芯部の先端部との間に、各流路の少なくとも一部を構成するチャンバが形成され、
各流路において、各チャンバの流路断面は、各芯部側通路の流路断面よりも大きい、
第5態様又は第6態様に記載の噴霧器を提供する。
各サブノズルの内部に、各サブノズルの先端部と各芯部の先端部との間に配置されたロッドを更に備え、
各チャンバは、各ロッドと各サブノズルの先端部との間に形成され、
各ロッドと各サブノズルの内部側面との間に、ロッド側通路が形成されている、
第7態様に記載の噴霧器を提供する。
各流路おいて、前記ロッド側通路の流路断面は、前記チャンバの流路断面よりも小さい、第8態様に記載の噴霧器を提供する。
各ロッドは、各サブノズルの先端部に接触し、
各ロッドと各サブノズルの先端部との間に、前記軸方向に交差する方向に延び、各ロッド側通路と各噴霧孔とを流体連通する導通路が形成される、
第8態様又は第9態様に記載の噴霧器を提供する。
各流路において、各芯部側通路の流路断面は、各穴部の流路断面よりも小さい、第1~第10態様のいずれか1つに記載の噴霧器を提供する。
前記受け部は、前記アダプタの平面視において、前記接続管と重複する部分と、前記接続管と重複しない部分との両方を有する、第1~第11態様のいずれか1つに記載の噴霧器を提供する。
前記接続管は、
前記軸方向において前記穴部よりも前記接続端部側に設けられた大断面部と、
前記軸方向において前記大断面部よりも前記接続端部側に設けられ、前記軸方向に対する断面が前記大断面部よりも小さい小断面部と、
を有し、
前記接続管の内部に配置されたストッパを更に備え、
前記ストッパは、前記小断面部において前記接続管の内面に液密に接触し、かつ、前記大断面部において前記接続管の内面との間に隙間を形成するように構成され、
前記ストッパは、前記液体によって前記軸方向における前記接続端部側から押圧されたときに、前記小断面部から前記大断面部にスライドするように構成された、
第1~第12態様のいずれか1つに記載の噴霧器を提供する。
前記接続管は、前記大断面部と前記小断面部との間に設けられ、前記軸方向に沿って前記小断面部に近づくに従って前記軸方向に対する断面が漸次的に拡大する拡大部を有する、第13態様に記載の噴霧器を提供する。
前記接続管は、前記拡大部と前記大断面部との間に設けられ、前記軸方向に沿って前記大断面部から離れるに従って前記軸方向に対する断面が漸次的に縮小する縮小部を有する、第14態様に記載の噴霧器を提供する。
前記ノズルの形状及び前記アダプタの形状は、前記接続管の軸に対して対称である、第1~第15態様のいずれか1つに記載の噴霧器を提供する。
図1は、本発明の実施形態に係る噴霧器1及びシリンジ9の斜視図である。図2は、図1の噴霧器1及びシリンジ9の分解斜視図である。図1及び図2、並びに、後述する図3~図6、図8~図21、及び図23~図25には、説明の便宜上、互いに直交するX軸、Y軸、及びZ軸を示している。本明細書では、通常使用時の状態を想定して、Z軸の正方向を「上」、Z軸の負方向を「下」とも呼ぶ。しかしながら、これらの方向を示す用語は、本発明の使用状態等を限定することを意味するものではない。
次に、噴霧器1の組立について説明する。ロッド3は、膨出部31がサブノズル21の突起26に接触した状態で、各サブノズル21の内部に配置されている。より詳細には、膨出部31の傾斜面31aが、突起26の頂部よりも先端部21a側に接触している。この接触により、ロッド3は、仮想軸C1に沿って、サブノズル21の先端部21aに向かって付勢されている。このことにより、ロッド3は、サブノズル21の先端部21aに対してより確実に接触する。
以下、噴霧器1から液体を噴霧するときの動作について説明する。まず、シリンジ9の内部に噴霧する液体を充填する。例えば、シリンジ9のコネクタ92がISO80369-7の規格に準拠した形状を有する場合、コネクタ92に当該規格に準拠した注射針やチューブ等の器具を接続することができる。そのため、コネクタ92に接続した注射針等を介して、バイアル及びアンプル等の液体容器から液体を吸い上げて、シリンジ9に充填することができる。または、シリンジ9として、液体が予め充填されたプレフィルドシリンジを使用することもできる。
以上のように、本実施形態に係る噴霧器1は、鼻孔に挿入されるノズル2と、ノズル2と液体を収容するシリンジ9とを接続するアダプタ4とを備える。ノズル2は、噴霧孔23が設けられ鼻孔に挿入される先端部21aと、基端部21bとを有する少なくとも1つのサブノズル21を有する。アダプタ4は、シリンジ9に接続される接続端部41aを有し、流体連通する接続管41と、接続管41が延びる軸方向に沿って延びるとともに、前記軸方向に交差する径方向において、接続管41と異なる軸を有し、並列に配置された2つの芯部42と、各芯部42の外部側面42cかつ基端部42bに設けられ、各芯部42の先端部42aに向かって開口するU字状かつ環状の受け部45と、を有する。各受け部45には、接続管41に流体連通する穴部451が設けられる。ノズル2は、サブノズル21の内部に2つの芯部42のうち少なくとも一方が配置され、かつ、サブノズル21の基端部21bが受け部45に挿入されるように、アダプタ4に取り付けられる。サブノズル21と芯部42との間には、穴部451を介して接続管41に流体連通する芯部側通路65が形成されている。芯部側通路65は、穴部451から噴霧孔23に到達する流路の少なくとも一部を構成する。ノズル2がアダプタ4に取り付けられた取付状態において、サブノズル21の外面21dと外面21dに対向する円周壁43の対向面43aとは、芯部側通路65と外部とを区画するように液密に接触している。前記取付状態において、各サブノズル21の外面21dと各円周壁43の対向面43aとの接触部66のうち少なくとも1つは、前記軸方向に交差する断面において真円又は略真円である。
取り外されやすい。一方、前記構成によれば、アダプタ4からノズル2が意図せず取り外される可能性が低減されるので、傾斜した円周壁43の対向面43aを実現できる。
以上、本発明の実施形態を説明したが、これらの説明は本発明の一例に過ぎない。上記の例示的な実施形態に対しては、種々の改良や変形を行うことができる。例えば、以下のような変更が可能である。以下の変形例は適宜組み合わせることができる。
図19は、本発明の実施形態の第1変形例に係る噴霧器の図11に対応する部分拡大図である。図11に示す接続管41と比較して、図19に示す接続管41Aは、大断面部412及び拡大部414を有しない。図19に示すように、小断面部413と凹部416とは、仮想軸C2の軸方向において連続している。例えば、小断面部413と凹部416との境界部は、段差形状に形成される。図19に二点鎖線で示すように、ストッパ5の止水部52が接続管41の凹部416に到達すると、止水部52は、接続管41の内面41cから離れる。このことにより、圧縮された液体は、接続管41において、ストッパ5の止水部52よりも連通端部41b側(図19では上側)に進入する。
図20は、本発明の実施形態の第2変形例に係る噴霧器の図11に対応する部分拡大図である。図11に示す接続管41と比較して、図20に示す接続管41Bは、縮小部415を更に有する。縮小部415は、拡大部414と小断面部413との間に設けられている。縮小部415では、仮想軸C1に沿って拡大部414に近づくに従って、接続管41の軸方向に対する断面が漸次的に縮小する。
図21は、本発明の実施形態の第3変形例に係る噴霧器1Aの斜視図である。図3に示す噴霧器1と比較して、図21に示す噴霧器1Aでは、各サブノズル21の先端部21aが開口している。また、各サブノズル21の先端部21aに、チップ28が設けられている。
2 ノズル
21 サブノズル
21a 先端部
21b 基端部
21d 外面
23 噴霧孔
4 アダプタ
41,41A,41B 接続管
41a 接続端部
42 芯部
42a 先端部
42b 基端部
42c 外部側面
43 円周壁
43a 対向面
45 受け部
451 穴部
65 芯部側通路
66 接触部
9 シリンジ
Claims (16)
- 鼻孔に挿入されるノズルと、前記ノズルと液体を収容する容器とを接続するアダプタとを備える噴霧器であって、
前記ノズルは、噴霧孔が設けられ前記鼻孔に挿入される先端部と、基端部とを有する少なくとも1つのサブノズルを有し、
前記アダプタは、
前記容器に接続される接続端部を有し、流体連通する接続管と、
前記接続管が延びる軸方向に沿って延びるとともに、前記軸方向に交差する径方向において、前記接続管と異なる軸を有し、並列に配置された2つの芯部と、
各芯部の外部側面かつ基端部に設けられ、各芯部の先端部に向かって開口するU字状かつ環状の受け部と、
を有し、
各受け部に、前記接続管に流体連通する穴部が設けられ、
前記ノズルは、前記サブノズルの内部に前記2つの芯部のうち少なくとも一方が配置され、かつ、前記サブノズルの基端部が前記受け部に挿入されるように、前記アダプタに取り付けられ、
前記サブノズルと前記芯部との間に、前記穴部を介して前記接続管に流体連通する芯部側通路が形成され、
前記芯部側通路は、前記穴部から前記噴霧孔に到達する流路の少なくとも一部を構成し、
前記ノズルが前記アダプタに取り付けられた取付状態において、前記サブノズルの外面と当該外面に対向する前記受け部の対向面とは、前記芯部側通路と外部とを区画するように液密に接触し、
前記取付状態において、各サブノズルの外面と各受け部の対向面との接触部のうち少なくとも1つは、前記軸方向に交差する断面において真円又は略真円である、
噴霧器。 - 前記接触部は、前記軸方向において、前記接続管と前記噴霧孔との間に形成される、請求項1に記載の噴霧器。
- 前記受け部の対向面は、前記取付状態において、前記軸方向において前記受け部の開口に近づくに従って、前記芯部の外部側面から離れるように傾斜し、
前記受け部の対向面と前記サブノズルの外面とは、前記接触部で線状に接触する、
請求項1又は請求項2に記載の噴霧器。 - 前記受け部は、前記対向面の裏側を構成する外面から外向きに突出した環状の突起を有し、
前記ノズルは、前記取付状態において前記受け部の対向面に向かって突出した凸部を有し、
前記取付状態において、前記ノズルの凸部は、前記軸方向において前記受け部の突起よりも前記噴霧孔から離れた方に配置され、かつ、前記受け部の突起に接触している、
請求項1~3のいずれか一項に記載の噴霧器。 - 前記ノズルは、2つの前記サブノズルを有し、
各芯部は、前記取付状態において各サブノズルの内部に配置され、
前記取付状態において、2つの前記接触部は、前記軸方向に交差する断面においていずれも真円又は略真円である、
請求項1~4のいずれか一項に記載の噴霧器。 - 前記アダプタの平面視において、各芯部の輪郭は、各芯部の基端部によって形成される、請求項5に記載の噴霧器。
- 各サブノズルの内部において、各サブノズルの先端部と各芯部の先端部との間に、各流路の少なくとも一部を構成するチャンバが形成され、
各流路において、各チャンバの流路断面は、各芯部側通路の流路断面よりも大きい、
請求項5又は請求項6に記載の噴霧器。 - 各サブノズルの内部に、各サブノズルの先端部と各芯部の先端部との間に配置されたロッドを更に備え、
各チャンバは、各ロッドと各サブノズルの先端部との間に形成され、
各ロッドと各サブノズルの内部側面との間に、ロッド側通路が形成されている、
請求項7に記載の噴霧器。 - 各流路おいて、前記ロッド側通路の流路断面は、前記チャンバの流路断面よりも小さい、請求項8に記載の噴霧器。
- 各ロッドは、外向きに突出した膨出部を有し、
各サブノズルは、各内部側面から内向きに突出した突起を有し、
前記取付状態において、各サブノズルの突起は、前記軸方向において各ロッドの膨出部よりも各噴霧孔から離れた方に配置され、かつ、各ロッドの膨出部に接触し、
各ロッドは、各サブノズルの先端部に接触し、
各ロッドと各サブノズルの先端部との間に、前記軸方向に交差する方向に延び、各ロッド側通路と各噴霧孔とを流体連通する導通路が形成される、
請求項8又は請求項9に記載の噴霧器。 - 各流路において、各芯部側通路の流路断面は、各穴部の流路断面よりも小さい、請求項1~10のいずれか一項に記載の噴霧器。
- 前記受け部は、前記アダプタの平面視において、前記接続管と重複する部分と、前記接続管と重複しない部分との両方を有する、請求項1~11のいずれか一項に記載の噴霧器。
- 前記接続管は、
前記軸方向において前記穴部よりも前記接続端部側に設けられた大断面部と、
前記軸方向において前記大断面部よりも前記接続端部側に設けられ、前記軸方向に対する断面が前記大断面部よりも小さい小断面部と、
を有し、
前記接続管の内部に配置されたストッパを更に備え、
前記ストッパは、前記小断面部において前記接続管の内面に液密に接触し、かつ、前記大断面部において前記接続管の内面との間に隙間を形成するように構成され、
前記ストッパは、前記液体によって前記軸方向における前記接続端部側から押圧されたときに、前記小断面部から前記大断面部にスライドするように構成されている、
請求項1~12のいずれか一項に記載の噴霧器。 - 前記接続管は、前記大断面部と前記小断面部との間に設けられ、前記軸方向に沿って前記小断面部に近づくに従って前記軸方向に対する断面が漸次的に拡大する拡大部を有する、請求項13に記載の噴霧器。
- 前記接続管は、前記拡大部と前記大断面部との間に設けられ、前記軸方向に沿って前記大断面部から離れるに従って前記軸方向に対する断面が漸次的に縮小する縮小部を有する、請求項14に記載の噴霧器。
- 前記ノズルの形状及び前記アダプタの形状は、前記接続管の軸に対して対称である、請求項1~15のいずれか一項に記載の噴霧器。
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007105365A (ja) | 2005-10-17 | 2007-04-26 | Mitani Valve Co Ltd | 鼻腔用噴射器 |
JP2013132452A (ja) * | 2011-12-27 | 2013-07-08 | Yoshino Kogyosho Co Ltd | 吐出器 |
WO2015018758A2 (de) * | 2013-08-07 | 2015-02-12 | Aptar Radolfzell Gmbh | Pumpeinrichtung und spender für flüssige oder pastöse medien |
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007105365A (ja) | 2005-10-17 | 2007-04-26 | Mitani Valve Co Ltd | 鼻腔用噴射器 |
JP2013132452A (ja) * | 2011-12-27 | 2013-07-08 | Yoshino Kogyosho Co Ltd | 吐出器 |
WO2015018758A2 (de) * | 2013-08-07 | 2015-02-12 | Aptar Radolfzell Gmbh | Pumpeinrichtung und spender für flüssige oder pastöse medien |
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