JP2007195838A - Nebulizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nebulizer which is suitable to a jet type nebulizer e.g., where a chemical never flows out and the expected aerosol state of the chemical is maintained even when a container is tilted and used, so that safety and reliability in use are secured, and which can be easily assembled and can be produced at a low cost. <P>SOLUTION: A nozzle 6 is projectingly formed at the liquid pool chamber 5 formed inside of a case housings 4 to jet compressed air from the nozzle hole 13 of the nozzle 6. A liquid suction tube 7 is mounted on the outer peripheral surface of the nozzle 6, and a suction port 21 through which a liquid 12 in the liquid pool chamber 5 can be sucked out is formed at the upper end of the liquid suction tube 7. A suck-up groove 19 communicating with the suction port 21 is formed at the inner surface of the liquid suction tube 7, and a baffle 23 is arranged right over the nozzle hole 13. Thus, the nebulizer 1 can generate aerosol 29 by making the compressed air and the liquid 12 collide with the baffle 23. The suck-up groove 19 is formed at the whole periphery of the inner surface of the lower end of the liquid suction tube 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is suitable for, for example, a jet type nebulizer, and there is no fear of the outflow of a chemical even when the body is tilted, and the intended aerosol state of the chemical is maintained to improve the safety and reliability in use. The present invention relates to a nebulizer that can be secured and can be easily assembled at low cost.

As a drug administration method or treatment method for patients with asthma or pulmonary disease, there is an inhalation therapy in which a drug solution is atomized (aerosol) and this is inhaled into the patient to deposit the drug in the respiratory tract or lungs. A nebulizer is used in which a drug solution is prepared to a predetermined particle size, atomized, and inhaled by a patient.
The nebulizer includes an ultrasonic nebulizer that atomizes using an ultrasonic vibration, and a jet nebulizer that atomizes using a jet flow ejected from a nozzle, and the former is compared to the latter. And generally expensive.

  Among these, as a jet-type nebulizer, a storage section for storing a spray liquid is provided inside a substantially frustoconical envelope, and a nozzle capable of supplying compressed air is provided in the center of the storage section so as to protrude. A small hole is opened upward, a plurality of concave grooves are formed in the axial direction on the peripheral surface of the nozzle, and a structure is fitted to the nozzle and is erected, and communicates with the small hole at the upper end of the structure. An opening is formed, a second structure is fitted on the upper part of the structure, two upper lids are arranged on the upper part of the second structure, and a tubular part is formed on the upper part of the envelope. There is one that is fitted and provided with a tubular outlet for sucking a patient at one end of the tubular portion (see, for example, Patent Document 1).

  The nebulizer supplies compressed air from the air inlet of the reservoir when in use, guides it into the nozzle and ejects it from the small hole, and the spray liquid is recessed by the negative pressure formed between the nozzle and the structure. , It is guided to the small hole and atomized with the compressed air, the mist particles are moved into the second structure, and the two upper lids are submerged to remove the large mist particles. The particles were moved and inhaled by the patient.

  However, since the nebulizer is fine mist particles, it moves to the back of the airway and deposits in the lung and does not deposit in the airway, so it is suitable for patients with lung disease but unsuitable and dangerous for asthma patients, In addition, when the envelope is tilted, the concave groove is separated from the spray liquid, so that the liquid cannot be sucked up or atomized, and the spray liquid may leak from the envelope. There was a problem that the above safety was impaired.

  In order to solve such a problem, a plurality of nozzles and structures are arranged in a cylinder, and a second structure is provided on the structure so as to be movable up and down, depending on the deposition position of mist particles corresponding to the treatment purpose. There is one that moves and adjusts the position of the second structure so that a desired fog particle diameter can be obtained (for example, see Patent Document 2).

  However, while the nebulizer can obtain a desired mist particle diameter, when the cylinder is tilted, the concave groove is separated from the spray liquid, so that the liquid cannot be sucked up or atomized. May leak from the envelope, and there is a problem that safety in use is impaired.

  In order to solve such problems, the nozzle and the structure are formed in a truncated cone shape that reduces the diameter upward, and the mist particles ejected from the nozzle collide with the turning member immediately above, removing the large mist particles and reducing the weight. The small-diameter mist particles are moved to the inner chamber of the container and guided to the mouthpiece side, and an inlet valve is provided at the top of the container to allow outside air to be taken in. The user takes in the outside air when inhaling the mist particles, This is led to the air flow down line, and at that time, the outlet valve is closed to promote the movement to the mouthpiece side, and the mist particles can be inhaled without waste, while the exhaled gas is sent to the outer surface of the mouthpiece. There is an outlet valve that can be discharged, and the inlet valve is closed when the user exhales, so that exhaled gas is discharged to the outside without waste (for example, see Patent Document 3).

  However, if the nebulizer is used with the container tilted, the sprayed liquid may leak from the upper part of the container or the mouthpiece, and the nozzle and the structure are provided separately. Then, the structure is separated from the nozzle, the interval with the surface of the turning member is changed, the mist particle diameter and the amount of mist particles are changed and the intended use cannot be obtained, and the safety in use is impaired. Since the distance between the nozzle and the structure is set to be extremely minute and precise, precise assembly accuracy is required and there are problems such as high cost.

JP 54-146008 A Japanese Patent Publication No. 2-51612 Japanese Patent Publication No. 11-506642

  The present invention solves such problems, and is suitable for, for example, a jet type nebulizer. There is no fear of outflow of a chemical even when the body is tilted, and the intended aerosol state of the chemical is maintained for use. An object of the present invention is to provide a nebulizer that can ensure safety and reliability of the apparatus, and can be easily assembled at low cost.

  According to the first aspect of the present invention, a nozzle projects from the bottom of a liquid storage chamber provided inside the case housing, allows compressed air to be ejected from the nozzle nozzle, and absorbs liquid on the outer peripheral surface of the nozzle. A pipe is attached, and a suction port capable of sucking out the liquid in the liquid storage chamber is formed at the upper end of the liquid suction pipe, and a suction groove capable of communicating with the suction port is formed on the inner surface of the liquid suction pipe, In a nebulizer in which a baffle is disposed immediately above the nozzle and the compressed air and liquid collide with the baffle so that aerosol can be generated, a suction groove is formed on the entire inner surface of the lower end portion of the suction pipe. Even when the nebulizer is tilted and used abnormally, the suction groove can be immersed or immersed in the liquid in the liquid storage chamber, so that the liquid can be sucked up and the aerosol can be generated. To ensure the sex There.

The invention of claim 2 forms the planar shape of the inner surface of the liquid absorption pipe in a substantially elliptical shape, and forms a gap that increases or decreases in the circumferential direction between the inner surface of the liquid absorption pipe and the outer peripheral surface of the nozzle, The liquid in the liquid reservoir is surely and efficiently sucked out.
According to a third aspect of the present invention, a plurality of large gaps are formed between the inner surface of the liquid suction pipe and the nozzle so that the liquid in the liquid reservoir can be reliably sucked out without waste.
According to a fourth aspect of the present invention, the baffle is integrally provided at the upper end portion of the liquid suction pipe to reduce the number of parts, simplify the configuration, and facilitate assembly thereof. In the invention of No. 5, the lower end portion of the ventilation duct is disposed on the baffle so as to be engageable, and even when the nebulizer is tilted and used, the baffle is prevented from moving or misaligned to ensure stable aerosol generation. I am trying to get it.

According to a sixth aspect of the present invention, the ventilation duct can communicate with the outside air, and the inhalation movement of the aerosol is promoted by the pressure of the outside air that has flowed in.
According to a seventh aspect of the present invention, a guide cone is disposed around the upper portion of the liquid absorption pipe to prevent the aerosol from being diffused and can be used without waste.
According to an eighth aspect of the present invention, the ventilation duct is disposed inside the guide cone so as to surely enhance the inhalation movement of the aerosol.
The invention according to claim 9 makes it possible to always introduce outside air into the ventilation duct to prevent a suffocation accident caused by a failure of an exhaust valve during inhalation of aerosol and a suffocation accident caused by a failure of the exhaust valve during expiration of a user. The above safety is ensured.

Since the suction groove is formed in the entire circumference of the inner surface of the lower end portion of the liquid suction pipe, the suction groove can be immersed or immersed in the liquid in the liquid storage chamber even when the nebulizer is tilted. Thus, the liquid can be sucked up and the aerosol can be generated, and the safety and reliability in abnormal use can be ensured.
In the invention of claim 2, the planar shape of the inner surface of the liquid suction pipe is formed in a substantially elliptical shape, and a gap that increases or decreases in the circumferential direction is formed between the inner surface of the liquid suction pipe and the outer peripheral surface of the nozzle. The liquid in the liquid storage chamber can be sucked out reliably and efficiently.

According to the invention of claim 3, since a plurality of large gaps are formed between the inner surface of the liquid suction pipe and the nozzle, the liquid in the liquid reservoir can be surely sucked out without waste.
In the invention of claim 4, since the baffle is integrally provided at the upper end portion of the liquid suction pipe, the number of parts can be reduced, the configuration can be simplified, and the assembly thereof can be easily performed.
In the invention of claim 5, since the lower end portion of the ventilation duct is disposed on the baffle so as to be engageable, even when an abnormal use of the nebulizer is tilted, the movement and displacement of the baffle are prevented, and a stable aerosol is produced. Occurrence can be ensured.

According to the sixth aspect of the present invention, since the ventilation duct can communicate with the outside air, the inhalation movement of the aerosol can be promoted by the pressure of the inflowing outside air.
According to the seventh aspect of the present invention, since the guide cone is disposed so as to surround the upper part of the liquid absorption pipe, it is possible to prevent the diffusion of the aerosol and use it without waste.

In the invention of claim 8, since the ventilation duct is arranged inside the guide cone, the inhalation movement of the aerosol can be surely enhanced.
According to the ninth aspect of the present invention, since the outside air can be always introduced into the ventilation duct, the suffocation accident due to the failure of the exhaust valve at the time of inhalation of the aerosol and the suffocation accident due to the failure of the exhaust valve at the time of expiration of the user are prevented. Safety in use can be ensured.

  Hereinafter, the illustrated embodiment in which the present invention is applied to a jet-type nebulizer for an asthma patient will be described. In FIGS. 1 to 10, reference numeral 1 denotes a hook 2 attached to a storage case (not shown). A nebulizer in which a piece 3 is hooked and supported vertically. The nebulizer 1 includes a case housing 4, a liquid reservoir chamber 5 provided at an intermediate portion of the housing 4, and a bottom portion of the liquid reservoir chamber 5. The nozzle 6, the liquid suction pipe 7 fitted and fitted to the nozzle 6, the upper housing 8 attached to the upper end portion of the case housing 4, and the lower end portion of the upper housing 8. A guide cone 9, a fog adjusting cap 10 rotatably attached to the peripheral surface of the upper housing 8, and a mouthpiece 11 connected to the upper end of the upper housing 8, which are heat resistant and Chemical resistant synthesis It is molded into a predetermined shape by fat.

Among these, the main part of the case housing 4 is resin-molded in a substantially cylindrical shape, and a bottomed liquid reservoir chamber 5 is provided at an intermediate position inside the case housing 4, and a chemical liquid 12 as a suction liquid is accommodated in the chamber 5. It is possible.
A nozzle 6 protrudes upward from the bottom of the liquid reservoir 5, and the nozzle 6 is formed in a circular cone or truncated cone shape whose diameter is reduced upward, and its lower end is the inner diameter of the case housing 4. The upper end of the liquid storage chamber 5 is arranged at the approximate center of the middle and high portions, and a fine circular nozzle 13 is formed at the upper end.

A conduit 14 communicating with the nozzle 13 is provided below the nozzle 6, the inner diameter of the tube 14 gradually decreases toward the upper nozzle 13, and the upper end of the hose joint 15 is formed at the lower end of the tube 14. Are connected.
An air supply hose 16 is connected to the lower end portion of the hose joint 15, and the other end of the hose 16 is connected to an air compressor (not shown) as a compressed air source. In the figure, reference numeral 17 denotes a knob piece protruding from the side of the lower end portion of the hose joint 15.

  The outer peripheral surface of the nozzle 6 is formed to be smooth, and the liquid absorption pipe 7 is attached by polymerization on the smooth surface. The liquid absorption pipe 7 is formed in a truncated cone shape that can be fitted to the nozzle 6, and a flat elliptical liquid absorption hole 7 a is formed inside thereof, and the wall surface of the liquid absorption hole 7 a is formed in a smooth surface, A lower end portion of the liquid suction pipe 7 is disposed so as to be engageable between the inner surface of the case housing 4 and the lower end portion of the nozzle 6.

As shown in FIG. 6, the liquid suction hole 7 a is formed in a substantially elliptical shape having a long diameter in the length direction of a baffle described later, and between the outer peripheral surface of the nozzle 6 fitted in the liquid suction hole 7 a, Gaps e ₁ and e ₂ (e ₁ <e ₂ ) that increase and decrease in the circumferential direction are formed. That, is formed larger than the gap e ₁ gap e ₂ is the direction perpendicular to the longitudinal direction of the baffle in the lengthwise direction of the baffle.

The substantially oval shape of the liquid absorption hole 7a is formed in a substantially similar shape from the lower end portion on the large diameter side of the liquid absorption tube 7 to about 2/3 of the height of the liquid absorption tube 7, and the liquid absorption from above. The planar shape of the hole 7a is formed in a perfect circle.
The lower end surface of the liquid absorption pipe 7 is formed in an annular smooth surface, and a plurality of, in the embodiment, four convex portions 18 are provided at the same angular position. The lower end surface of the liquid absorption pipe 7 and the liquid reservoir chamber 5 are provided. A minute gap is formed between the bottom of the substrate.

  The inner peripheral surface of the liquid suction pipe 7 is formed smoothly, and a pair of suction grooves 19, 19 are formed symmetrically at positions facing the inner surface. The suction groove 19 is formed over the entire area excluding the substantially leaf-shaped bare surfaces 20 and 20 disposed opposite to the inner surface of the liquid suction hole 7a, that is, the area where the suction groove 19 is not formed.

  That is, the suction groove 19 is formed in the whole area at the lower end portion of the inner peripheral surface of the liquid suction hole 7a, and the substantially leaf-shaped bare surfaces 20 and 20 are opposed to the substantially elliptical long diameter side except for the lower end portion. A suction groove 19 is formed in a wide range on the inner peripheral surface of the liquid suction hole 7a excluding the areas of the bare surfaces 20 and 20, and the depth of the groove 19 is the edge of the bare surfaces 20 and 20 The portion is formed deepest, and is gradually shallowly formed in the circumferential direction from the portion.

  On the other hand, when the height of the liquid suction pipe 7 is approximately 2/3 or more, the area of the suction groove 19 gradually decreases, and a pair of suction grooves 19 formed narrowly are formed at the upper end of the liquid suction pipe 7. It communicates with the mouth edge of the suction hole 21.

  That is, the depth and width of the suction groove 19 change three-dimensionally on the inner peripheral surface of the liquid suction hole 7a, and the depth is from the lower end of the liquid suction pipe 7 as shown in FIGS. Between the substantially middle and high portions, it is formed gently deeper upward, and between the middle and high portions and the suction hole 21 is formed while maintaining a substantially constant depth.

  Further, as shown in FIGS. 5 and 7, the width of the suction groove 19 is substantially asteroid from the lower end portion of the liquid absorption tube 7 to the substantially middle and high portions upward from the entire inner circumference of the liquid absorption tube 7. It is formed in a curvilinear and gradually decreasing shape, and is formed with a substantially constant width between the middle and high portions and the suction hole 21.

A substantially elliptical or quadrangular suction hole 21 is formed at the upper end of the liquid suction pipe 7 so as to face the nozzle 13, and the suction grooves 19, 19 communicate with the opening on the long axis side. ing.
A pair of legs 22 project from the opening edge of the suction hole 21, and a substantially rectangular plate-like baffle 23 is stretched over the legs 22, 22.

The baffle 23 is formed integrally with the liquid suction pipe 7 and is disposed directly above the suction hole 21 via a gap 24. In the embodiment, the gap 24 is formed to be relatively large for forming an aerosol particle size for an asthmatic patient. ing.
The cross section of the baffle 23 is formed in a vertically long rectangle, and a taper surface 25 is formed on both sides of the lower end of the baffle 23 so as to face the opening on the long axis side of the suction hole 21. Is functioning.

A lower end portion of the upper housing 8 is hermetically connected to an upper end portion of the case housing 4 via an O-ring 26, and a conical taper surface 8a is formed at an intermediate portion thereof.
A ground paper-shaped air intake 27 is formed in a part of the taper surface 8 a along the circumferential direction, and a ventilation duct 28 is formed so as to protrude inward so as to face the intake 27.
The ventilation duct 28 is bent and formed into a substantially square shape, its ventilation path is formed in a flat, substantially elliptical tube shape, and its lower end is disposed so as to be engageable directly above the baffle 23. 7 movement can be blocked.

  The guide cone 9 is formed in a truncated cone-shaped tube having a diameter reduced downward, and a large-diameter portion at the upper end is fitted and connected to a lower-end portion of the upper housing 8, and a small-diameter portion at the lower end is connected to the lower-diameter portion. It is arranged so as to surround the upper periphery of the liquid absorption pipe 7, and the generated mist-like aerosol 29 can be moved without waste.

  The fog adjusting cap 10 is rotatably mounted on the taper surface 8a, and a blocking piece 30 capable of opening and closing the air intake 27 is protruded on the inside thereof, depending on the rotation angle of the cap 10. The movement of the aerosol 29 can be promoted or suppressed by adjusting the opening of the air intake 27 and adjusting the amount of air taken in from the inlet 27.

  Note that the fog adjusting cap 10 of the embodiment has a small-diameter vent (not shown) provided in the upper portion communicating with the ventilation duct 28 even when the fog adjusting cap 10 is fully closed, thereby avoiding a suffocation accident when the aerosol 29 is inhaled, or It is possible to cope with a failure of an exhaust valve described later during exhalation.

  In the figure, 31 is an adjustment display provided on the circumferential surface of the fog adjustment cap 10, 32 is an adjustment operation direction display provided immediately below the fog adjustment cap 10, and adjustment amount displays 33 and 34 are provided on both sides of the display 31. The amount of air intake is displayed.

  The mouthpiece 11 is bent into a substantially U-shape, the suction port 35 is opened at the upper end portion thereof, and the exhaust hole 36 is formed on the peripheral surface of the mouthpiece 11, and the opening edge outside the exhaust hole 36 is formed. A sheet-like exhaust valve 37 is attached to the part so that the part can be opened and closed with the base end as a fulcrum.

In addition, 38 is a switch lever attached to the peripheral surface of the case housing 4 so as to be movable up and down. The air compressor (not shown) can be turned ON / OFF, and 39 is the switch lever 38. A stopper attached directly above is engaged with the lever 38 when it is operated up and down, and the displacement of the switch lever 38 can be locked.
Reference numeral 40 denotes a liquid level display portion provided on the peripheral surface of the case housing 4 so as to be transparent, and a plurality of liquid level display scales 41 are displayed at the upper and lower positions of the peripheral surface.

The nebulizer 1 configured as described above is roughly divided into a case housing 4, a liquid suction pipe 7, an upper housing 8, a fog adjusting cap 10, and a mouthpiece 11, which are not used. It is disassembled and is housed in a housing case (not shown) together with the holder-2, air compressor (not shown), air supply hose 16 and the like.
In this case, since the liquid absorption pipe 7 is integrally formed with the baffle 23 and the interval 24 thereof is formed constant, the number of parts is reduced and the work of assembling is reduced as compared with the case where they are separately installed and assembled. As a result, the interval 24 can be reliably and stably obtained.

A smooth liquid absorbing hole 7a is formed inside the liquid absorbing pipe 7, and the liquid absorbing hole 7a is formed in a substantially elliptical shape having a major axis in the length direction of the baffle 23 and is fitted into the liquid absorbing hole 7a. The gaps e ₁ and e ₂ (e ₁ <e ₂ ) that increase and decrease in the circumferential direction are formed between the nozzle 6 and the nozzle 6 that performs the above operation. That, also formed larger than the gap e ₁ the gap e ₂ in the longitudinal direction of the longitudinal direction and orthogonal direction of the baffle of the baffle 23, wicking grooves 19, 19 formed in the liquid-absorbing hole 7a is liquid absorption Since the tube 7 is molded simultaneously with the resin molding, a uniform and stable groove shape can be obtained.

When the nebulizer 1 is used, the component parts are taken out from the storage case and assembled.
That is, the liquid absorption pipe 7 integrated with the baffle 23 is fitted to the nozzle 6 in the case housing 4, and a predetermined amount of the chemical liquid 12 is injected into the liquid storage chamber 5 with a dropper or the like, and then the upper end of the case housing 4. The upper housing 8 to which the guide cone 9 is previously attached is connected to the portion.

At that time, the lower end portion of the guide cone 9 on the tapered side is disposed so as to surround the outer side of the upper portion of the nozzle 6, and the lower end portion of the ventilation duct 28 integrated with the upper housing 8 is engaged directly above the baffle 23. Place them as close as possible.
Then, the fog adjusting cap 10 is assembled to the taper surface 8 a of the upper housing 8, and the mouthpiece 11 is connected to the upper end portion of the upper housing 8.

Thereafter, the upper end of the hose joint 15 is fitted to the lower end of the conduit 14, the air supply hose 16 is connected to the lower end of the joint 15, and the other end of the hose 16 is connected to the air Connect to a compressor (not shown).
Further, the hooking piece 3 is hooked on the holder-2 to support the nebulizer 1 vertically, and a power cord (not shown) connected to the switch lever 38 is connected to the power source.

When the switch lever 38 is turned on after assembling in this way, an air compressor (not shown) is driven, and the compressed air is guided from the air supply hose 18 to the conduit 14 and ejected from the nozzle 13 of the nozzle 6. To do.
For this reason, a negative pressure is formed between the nozzle 13 and the suction grooves 19, 19 facing the nozzle 13, and the chemical liquid 12 in the liquid reservoir 5 is sucked into the suction grooves 19, 19 by the negative pressure. Then, the chemical solution 12 collides with the taper surfaces 25, 25 of the baffle 23 directly above, and the compressed air collides with the flat lower end surface of the baffle 23 directly above to generate a fine mist aerosol 29. .

The aerosol 29 is prevented from spreading outward by the guide cone 9 and moves up along the inner surface of the guide cone 9 without waste.
At that time, a predetermined amount of outside air is taken in from the air intake 27 of the mist adjusting cap 10, and is led down to the ventilation duct 28, and the aerosol 29 is pushed up by the atmospheric pressure to promote its upward movement.

Therefore, the aerosol 29 quickly moves in the direction of the arrow in FIG. 3, flows out of the suction port 35, and is inhaled by the user. In the embodiment, the particle size of the aerosol 29 is formed to be 0.5 to 5 μm, and this is deposited in the airways of asthmatic patients to obtain the intended medicinal effect.
In this case, if the fog adjusting cap 10 is turned to adjust the amount of air taken in, the amount of aerosol 29 inhaled and the moving speed can be adjusted, and the use according to the user's preference can be achieved.

  On the other hand, when the aerosol 29 is inhaled, the exhaust valve 37 is closed, and the aerosol 29 can be inhaled without waste. In addition, even when the mist adjustment cap 10 is fully closed during the inhalation, a slight amount of air flows from the vent hole (not shown), thereby preventing a user's suffocation accident and ensuring safety in use.

  Further, when the user exhales, the exhaust valve 37 is opened by the exhalation pressure, and the exhalation can be discharged to the outside from the exhaust hole 36. At that time, even if the exhaust valve 37 is broken and cannot be opened, a vent hole (not shown) is opened to discharge a certain amount of exhaled air, thereby preventing a user's suffocation accident and safety in use. Sex can be secured.

  When such a nebulizer 1 is used, when the nebulizer 1 tilts due to external vibration or impact or is tilted and used by a user's action, the drug solution 12 moves to the mouthpiece 11 side by the guide cone 9. Therefore, it is possible to prevent leakage of the chemical solution 12 and ensure safety in use.

  Even if the nebulizer 1 is tilted, the baffle 23 engages with the lower end portion of the ventilation duct 28 to prevent the movement or position change of the liquid suction pipe 7, and also prevents the nozzle 6 from detaching and the baffle. Since the gap 24 between the nozzle 23 and the nozzle 6 does not change, the particle size of the aerosol 29 does not change, and the initial state of the aerosol 29 can be maintained.

  In addition, since the suction groove 19 is formed on the entire inner periphery of the lower end portion of the liquid suction pipe 7, there is a certain immersion or immersion state between the suction groove 19 and the chemical liquid 12 in the liquid storage chamber 5. It is ensured that the chemical liquid 12 can be sucked up through the suction groove 19.

At that time, gaps e ₁ and e ₂ (e ₁ <e ₂ ) between the liquid suction hole 7a and the outer peripheral surface of the nozzle 6 are formed to change on the circumference, and are formed on the inner peripheral surface of the liquid suction hole 7a. Since the e _{2 at} the lower end of the formed rough leaves 20 and 20 is formed to be the largest, the remaining amount of the chemical solution 12 can be sucked up efficiently and without waste, and even if the nebulizer 1 is tilted and used, it is constant. The aerosol 29 can be inhaled, and safety in use can be ensured.

  As described above, the nebulizer of the present invention does not have to worry about the outflow of the chemical even when the body is tilted, and can maintain the intended aerosol state of the chemical to ensure safety and reliability in use. Since it is easy to assemble and can be manufactured at low cost, it is suitable, for example, for a jet type nebulizer.

It is a top view which shows embodiment of the jet-type nebulizer to which this invention is applied. It is a right view of FIG. It is sectional drawing in alignment with the AA of FIG. 1, and shows the use condition which generate | occur | produces and inhales aerosol, supporting vertically. It is a top view which expands and shows the liquid absorption pipe applied to this invention. It is sectional drawing which follows the BB line of FIG.

FIG. 5 is a bottom view of FIG. 4. It is sectional drawing which follows the CC line of FIG. It is sectional drawing which follows the DD line | wire of FIG. It is sectional drawing which follows the EE line | wire of FIG. It is sectional drawing which follows the FF line | wire of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Nebulizer 4 Case housing 5 Reservoir chamber 6 Nozzle 7 Absorption pipe 9 Guide cone 12 Liquid (chemical solution)

13 nozzle 19 sucking groove 21 suction hole 23 baffle 28 ventilation duct 29 aerosol e ₁ , e ₂ gap

Claims (9)

  A nozzle is projected from the bottom of a liquid reservoir chamber provided inside the case housing so that compressed air can be ejected from the nozzle orifice, and a liquid suction pipe is attached to the outer peripheral surface of the nozzle. A suction port capable of sucking out the liquid in the liquid storage chamber is formed at the upper end portion of the liquid pipe, and a suction groove capable of communicating with the suction port is formed on the inner surface of the liquid suction pipe, while a baffle is provided directly above the nozzle hole. A nebulizer which is arranged and has a suction groove formed on the entire circumference of the inner surface of the lower end portion of the liquid absorption pipe in the nebulizer which can generate aerosol by colliding the compressed air and liquid against the baffle.   The nebulizer according to claim 1, wherein a planar shape of the inner surface of the liquid absorption pipe is formed in a substantially elliptical shape, and a gap that increases or decreases in the circumferential direction is formed between the inner surface of the liquid absorption pipe and the outer peripheral surface of the nozzle.   The nebulizer according to claim 2, wherein a plurality of large gaps are formed between the inner surface of the liquid absorption pipe and the nozzle.   The nebulizer according to claim 1, wherein the baffle is integrally provided at an upper end portion of the liquid absorption pipe.   The nebulizer according to claim 1, wherein a lower end portion of a ventilation duct is disposed on the baffle so as to be engageable.   The nebulizer according to claim 5, wherein the ventilation duct can communicate with outside air.   2. The nebulizer according to claim 1, wherein a guide cone is disposed above the liquid absorption pipe.   The nebulizer according to claim 5 or 6, wherein the ventilation duct is arranged inside the guide cone. The nebulizer according to claim 5 or 6, wherein outside air can be always introduced into the ventilation duct.

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