JP2014209854A - Powdered drug spraying apparatus and powdered drug spraying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powdered drug spraying apparatus and a powdered drug spraying method in which a powdered drug can be scattered without using an inconvenient medium such as gas or a solvent, the dissolution of the drug in the solvent and the application of heat for scattering the drug are not necessary, a fixed power supply is not needed, and is portable and simple.SOLUTION: A powdered drug spraying device 1 includes: a container body 11 containing water 51; a cylinder 31 inserted and attached to a lid 21 closing an upper end opening part 13 and having both opening ends facing the inside and outside of the container body 11; a powdered drug 30 with drug (d/d-T-cyphenothrin) impregnated in powder (fluorite) and contained in the cylinder 31; a piston 27 hermetically sliding to the lower side slide inner circumferential wall 33 of the cylinder 31, and also having a cavity S to an upper side enlarged diameter inner circumferential wall 35; and a sodium bicarbonate 41 and a citric acid 43 for producing a reactant gas by reacting with water 51 when being input in the container body 11.

Description

  The present invention relates to a powder medicine injection device and a powder medicine injection method for jetting and diffusing a powder medicine such as an insecticide.

  Conventionally, in order to get rid of the pests present in the room, water is used as a one-time-use type pesticide that sprays the entire amount of the drug in the room, including a smoke type that burns and uses the pesticide composition. Various types are known, including those that do not use fire, such as a heat transpiration type, an aerosol type sprayed with a propellant, and a pump type that sprays a solution with a pump.

A smoking type insecticide is a combination of an insecticidal component, an exothermic agent, and an auxiliary heat agent placed in a container. When ignited with a starter, insecticidal components and burning agents burn. At that time, the finer particles of the insecticidal component spread as smoke in the room (see Patent Document 1).
A heat transpiration type insecticide diffuses an insecticidal component by the force of a foaming agent from a container heated by reaction heat such as water and calcium oxide (see Patent Document 2).
Aerosol-type insecticides are those in which an insecticidal component is dissolved in a liquefied gas such as LP gas and compressed into a pressure-resistant container, and the insecticidal component is ejected in a fine mist. In the single use type, the push button is irreversibly locked, and the whole amount of the medicine is injected (see Patent Document 3).
A pump-type insecticide is an insecticide dissolved in a solvent and stored in a liquid container. The action of a pumping pump connected to the liquid container causes the insecticide to be sprayed in a fine mist (see Patent Document 4). ).

JP 2003-289788 A JP 2007-326851 A JP 2006-35065 A JP2011-11181A

However, the conventional single-use type insecticide described above has a problem that the insecticidal components that can be used are limited. That is, the smoking type and heat transpiration type insecticides are easily decomposed because the insecticidal components are heated to a very high temperature, and it is not possible to use insecticidal components that are weak against heat. In addition, since aerosol type and pump type insecticides are sprayed after dissolving the insecticidal component in a solvent or liquefied gas, it is not possible to use an insecticidal component with low solubility or an unstable insecticidal component in a liquid state.
In addition, when these types of insecticides burn, or when the foaming agent decomposes, a medium other than the insecticide, such as a solvent, decomposition gas (acid gas), or liquefied gas, is contained in the room. Be sprayed. Therefore, prior preparation such as covering a precision device such as a personal computer or an audio device, covering a fire alarm, or extinguishing a gas water heater is necessary at the time of use.

  Accordingly, the present invention has been made in view of such a situation, and suppresses the decomposition of the powdered drug due to the heat of the drug, and the powdered drug can be used without using a medium such as a decomposition gas, a liquefied gas, or a solvent. It is an object of the present invention to provide a powdery drug injection device and a powdery drug injection method that can diffuse.

The object of the present invention described above is achieved by the following configuration.
(1) a container body having an upper end opening;
A cylinder that is inserted into a lid that closes the upper end opening, and both opening ends face the inside and the outside of the container body;
The drug itself or the powdered drug impregnated in the powder and stored in the cylinder;
A piston that slides in an airtight manner on the lower sliding inner peripheral wall of the cylinder and has a gap with respect to the upper-diameter inner peripheral wall of the cylinder,
A powdery drug injection device characterized in that a reaction gas is generated in the container body and the piston is pushed up along the lower sliding inner peripheral wall.

(2) It is a powdery medicine injection device of the composition of the above (1),
An injection nozzle is provided at an upper opening end of the cylinder.

(3) It is a powdery medicine injection device of the composition of the above (2),
The powder medicine injection device according to claim 1, wherein the piston that has reached the inner diameter expansion wall on the upper side of the cylinder is prevented from moving toward the injection nozzle.

(4) generating a reaction gas in a container body having an upper end opening;
A piston containing a medicine itself or a powdery medicine in which a medicine is impregnated with a powder and sliding airtightly with respect to the lower sliding inner peripheral wall and having a gap with respect to the upper enlarged inner peripheral wall The upper end opening portion so that the lower opening end of the cylinder faces the inside of the container main body and the upper opening end of the cylinder faces the outside of the container main body. A process of attaching to,
And a step of injecting and diffusing the powdered medicine stored in the cylinder by pushing up the piston to the upper diameter-enlarged inner peripheral wall with a pressure in the container body of the reaction gas that has become a predetermined value or more. A powdery medicine injection method characterized by the above.

According to the powdery drug injection device having the above configuration (1), for example, the gas generating agent reacts with the liquid or the like in the container body to generate a reaction gas, whereby the inside of the container body becomes a high pressure. When the pressure in the container body exceeds a predetermined level, the piston in the cylinder is pushed up. Then, when the piston reaches the upper-diameter inner peripheral wall, the high-pressure reaction gas in the container body is released at once from the gap between the upper-diameter inner peripheral wall and the piston, and is powdered by the wind pressure of the high-pressure gas in the container main body. The medicine is sprayed and diffused out of the cylinder at once.
That is, the reaction gas for injecting and diffusing the powdered drug is confined in the container body until the pressure in the container body exceeds a predetermined value and the piston reaches the upper diameter expansion inner peripheral wall, and the piston expands to the upper diameter expansion inner peripheral wall. When it reaches, the air is released from the gap with the upper-side expanded inner peripheral wall at once, so that it is injected at once from the upper opening end of the cylinder. Therefore, a high-pressure reaction gas can be obtained without using an explosive reaction with heat.
Therefore, it is not necessary to smoke the smoke agent by burning the drug as in the prior art or to heat and evaporate the powdered drug using a hydrothermal exothermic agent that indirectly heats the foaming agent. As a result, heat is not applied to the powdered drug, and a drug weak against heat can be used. Moreover, it is not necessary to dissolve a chemical | medical agent in a solvent or liquefied gas like an aerosol type or a pump type, and a chemical | medical agent with low solubility or a chemical | medical agent unstable in a solution state can also be used.

  According to the powdery drug injection device having the configuration (2), the flow rate of the high-pressure gas released at once from the gap between the piston and the upper-side enlarged inner peripheral wall is further increased by the injection nozzle, and the powdery powder in the cylinder The medicine is more reliably injected and diffused out of the cylinder.

  According to the powdery medicine injection device having the configuration of (3) above, the piston that has reached the upper-diameter inner peripheral wall of the cylinder is prevented from moving toward the injection nozzle. It is possible to prevent the pushed-up piston from blocking the injection nozzle.

According to the method of injecting a powdery medicine having the configuration of (4) above, reaction gas is generated in the container body, the pressure in the container body becomes equal to or higher than a predetermined value, and the piston in the cylinder is pushed up, so that the upper-side expanded inner peripheral wall When the pressure reaches the pressure, the high-pressure reaction gas in the container body is released at once from the gap between the upper-diameter inner peripheral wall and the piston, and the powdered drug is jetted and diffused out of the cylinder at a stretch by the wind pressure of the high-pressure gas in the container body. . That is, the reaction gas for injecting and diffusing the powdered drug is confined in the container body until the pressure in the container body exceeds a predetermined value and the piston reaches the upper diameter expansion inner peripheral wall, and the piston expands to the upper diameter expansion inner peripheral wall. When it reaches, the air is released from the gap with the upper-side expanded inner peripheral wall at once, so that it is injected at once from the upper opening end of the cylinder. Therefore, a high-pressure reaction gas can be obtained without using an explosive reaction with heat.
In other words, like the conventional smoking type and heat transpiration type, use the decomposition gas generated when the smoking agent is smoked with the heat of the combustion agent or heating element, or when the blowing agent is decomposed by heating the blowing agent. By doing so, it is not necessary to diffuse the powdered medicine. As a result, heat is not applied to the powdered drug, and a drug weak against heat can be used. In addition, it is not necessary to dissolve a drug in a solvent or a liquefied gas as in the conventional aerosol type or pump type, and a drug with low solubility or a drug unstable in a liquid state can be used.

According to the powder medicine injection device and the powder medicine injection method of the present invention, the powder medicine can be diffused without using a medium such as a decomposition gas or a solvent. In addition, it is not necessary to dissolve the powdered drug in a solvent or liquefied gas, and it is not necessary to apply heat for diffusion. Therefore, a drug with low solubility, a drug that is unstable in a liquid state, or a drug that is easily decomposed by heat is used. Can be used.
Moreover, since the powdery medicine can be sealed in the cylinder simply by sealing the upper opening end with a cap, a rubber plug, a sealing film, etc., it is easy to handle. Furthermore, the powdered medicine in the cylinder can be prevented from being decomposed by moisture or oxidation of the outside air, and can be stored stably.
Furthermore, since the powdery drug injection device and the powdery drug injection method of the present invention do not require the use of a fixed power source or fire heat, there is no danger of a fire or the like, and it is safe and does not require a large-scale device. It can be carried and used even in places where there is no power supply or other equipment.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is a longitudinal section showing an outline of a powdery medicine injection device concerning one embodiment of the present invention. It is explanatory drawing for demonstrating the procedure of the powdery medicine injection method of injecting and diffusing a powdery medicine using the powdery medicine injection apparatus shown in FIG. It is a schematic plan view for demonstrating the test plot used for the test which confirms the pest control effect by the powdery pharmaceutical injection apparatus shown in FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the powdery drug injection device 1 of the present embodiment has an upper end opening 13, a container main body 11 that contains water (liquid) 51, and a lid 21 that closes the upper end opening 13. A cylinder 31 that is inserted and has both open ends facing the inside and outside of the container body 11, a powdered medicine 30 stored in the cylinder 31, and a lower sliding inner wall of the cylinder 31 in which the powdered medicine 30 is stored. A plunger 23 integrally formed with a piston 27 having an air gap S (see FIG. 2 (d)) with respect to the upper-side expanded inner peripheral wall 35 of the cylinder 31. Baking soda 41 and citric acid 43, which are gas generating agents that are charged into the main body 11 and generate a reaction gas in the water 51 in the container main body 11, are provided. Further, the piston 27 and the plunger 23 may be combined as separate bodies, and by molding the piston 27 with an elastic member such as rubber, the sealing performance of the cylinder 31 can be improved, or the inside of the container main body 11 when the piston 27 starts to move. The pressure can be controlled.

  The container body 11 of the present embodiment is a pressure-resistant container that has an upper end opening 13 and is integrally formed of a resin such as PET (polyethylene terephthalate). The container main body 11 can have various shapes as long as it has a top opening 13 and can be stably placed on the floor surface. The container body 11 is not limited to a resin container as long as it has a predetermined pressure resistance against an increase in internal pressure, and various containers such as a metal container, a ceramic container, and a glass container can be used.

  The lid body 21 is a bottomed cylindrical cap that is screwed into a thread provided on the outer peripheral surface of the upper end opening 13 of the container body 11 to close the upper end opening 13, and the plunger 23 penetrates the opening at the bottom center. doing.

The cylinder 31 according to the present embodiment is a pipe in which a polypropylene syringe cylinder 31B with a distal end is fitted on the proximal end side of a polypropylene pipette tip 31A, and the distal end side of the pipette tip 31A is The injection nozzle 37 has a narrowed shape that narrows toward the side opening end, and the inner diameter gradually decreases from the upper-side enlarged inner wall 35 toward the upper-side opening end. The lid 21 to which each base end side of the pipette tip 31 </ b> A and the cylinder 31 </ b> B constituting the cylinder 31 is fixed is attached to the upper end opening 13 of the container body 11, so that both opening ends of the cylinder 31 are inside the container body 11. And so as to face each other.
That is, the cylinder 31 has a gap S between the lower sliding inner wall 33 (corresponding to the inner wall of the cylinder 31 </ b> B) on which the piston 27 slides in an airtight manner and an inner diameter larger than the outer diameter of the piston 27. The upper diameter-expanding inner peripheral wall 35 (corresponding to the inner wall of the pipette tip 31A) and the piston 27 from the lower opening end having an inner diameter smaller than the outer diameter of the piston 27 below the lower sliding inner wall 33. The lower end reduced diameter inner wall 32 (corresponding to the lower end inner wall of the cylinder 31B) for preventing the dropout of the cylinder.
Furthermore, by providing the convex portion on the bottom surface of the outer peripheral side of the piston 27, it becomes difficult for the piston 27 to re-engage with the lower sliding inner wall 33, and a large gap S can be secured.

  The plunger 23 is a plunger of a polypropylene syringe, and is a piston rod 24 having a cross-sectional shape perpendicular to the axis, and a disc-like shape that is provided at the upper end of the piston rod 24 and slides airtight on the lower sliding inner wall 33. A piston 27 and a rod end 25 provided at the lower end of the piston rod 24 are provided. The piston rod 24 prevents the piston 27 from tilting when the piston 27 slides along the lower sliding inner wall 33 of the cylinder 31, and the piston 27 reaches the upper diameter enlarged inner peripheral wall 35 of the cylinder 31. In this case, a flow path is secured between the lower sliding inner wall 33 and the plunger 23. The lot end 25 has an outer diameter larger than the inner diameter of the lower sliding inner wall 33, and prevents the piston 27 from moving to the injection nozzle 37 when the piston 27 reaches the upper diameter expanding inner peripheral wall 35. Furthermore, by providing a convex portion on the outer peripheral side top surface portion of the rod end 25, the rod end 25 does not block the opening at the center of the bottom of the lid body 21, and a large flow path for the high-pressure gas G can be secured.

  A powdery medicine 30 is accommodated in the cylinder 31, a piston 27 of the plunger 23 is inserted into the lower opening end, and a cap 39 is fitted and sealed at the upper opening end. The cap 39 is a sealing member that seals the upper opening end of the cylinder 31 and is formed of a flexible resin material such as silicon. In addition, as a sealing member which seals the upper side opening end of the cylinder 31, a rubber plug and various sealing films can also be used. As the sealing film, for example, a parafilm (trade name: Parafilm M, model number: PM996, manufactured by Pechiney Plastic Packaging) can be used.

  A cap 39 that seals the upper opening end of the cylinder 31 located on the outer side of the container body 11 is formed of a resin material having flexibility such as silicon, and is simply fitted into the upper opening end. Can be sealed.

  The powdery medicine 30 is, for example, calcium silicate which is an inorganic powder (trade name, Florite RN, manufactured by Tokuyama Co., Ltd.), ciphenothrin (pyrethroid insecticide) as a medicine, dinotefuran which is a non-volatile insecticide, etc. Is impregnated. The drug impregnated in the powder is not limited to an insecticide containing an insecticidal component as an active ingredient, and various chemicals such as a fragrance, a deodorant, and a disinfectant can be used. Further, as the powder impregnated with the chemical, various powders such as inorganic powders such as calcium silicate and anhydrous silicic acid, and organic powders such as cellulose beads and powdered starch can be used. Moreover, the chemical | drug | medicine which is powder itself can be used as a powdery chemical | medical agent, or can be mixed and used for powder.

  In this embodiment, the liquid accommodated in the container main body 11 is water 51, and the gas generating agents are baking soda 41 and citric acid 43, respectively. Therefore, after opening the lid 21 and injecting water 51 into the container body 11 from the upper end opening 13, when sodium bicarbonate 41 and citric acid 43 are introduced, carbon dioxide (reactive gas) G reacts in the water 51 and reacts. Occur. Needless to say, the liquid and the gas generating agent are not limited to the water 51, the baking soda 41, and the citric acid 43, and various liquids and gas generating agents can be used. However, the reaction gas generated by the gas generating agent is preferably non-flammable and harmless to the human body, such as carbon dioxide, and does not generate high heat during the reaction.

  Next, the procedure of the powdery drug injection method for spraying and diffusing an insecticide using the powdery drug injection device 1 of the above embodiment will be described with reference to FIG. The powdery medicine injection device 1 is placed and used at the center of the room floor in order to spray insecticides and control insects such as cockroaches and house dust mites present in the room.

First, as shown in FIG. 2 (a), the lid 21 of the powder medicine injection device 1 is opened, and a predetermined amount of water 51 is injected into the container body 11 from the upper end opening 13. The amount of water 51 to be injected may be poured up to a scale provided on the container body 11 formed of a transparent or translucent resin, or pre-measured water 51 may be poured.
In addition, a predetermined amount of a water-absorbing polymer or an aqueous gel in which water is retained may be stored in the container body 11 in advance.

  Next, after putting sodium bicarbonate 41 and citric acid 43 into the container body 11, the lid 21 is screwed into the upper end opening 13 to seal the inside of the container body 11. At this time, the lid body 21 in which the powdery medicine 30 is stored and the cylinder 31 into which the plunger 23 is inserted and set is inserted is arranged such that the lower open end of the cylinder 31 faces the inside of the container body 11 and the cap 39 is removed. The cylinder 31 is attached to the upper end opening 13 so that the upper opening end faces the outside.

Then, as shown in FIG. 2B, the sodium bicarbonate 41 and the citric acid 43 react in the water 51 to generate carbon dioxide gas (reactive gas) G. The carbon dioxide gas G generated in the container body 11 gradually increases, and the inside of the container body 11 becomes a high pressure.
As shown in FIG. 2C, when the pressure of the carbon dioxide gas G in the container body 11 is not less than a predetermined pressure, for example, 30 to 40 kPa if the cylinder has an inner diameter of 9.5 mm, the piston 27 in the cylinder 31 Pushed up. In addition, by changing the fitting tolerance between the cylinder 31 and the piston 27, the material, etc., the inner diameter of the cylinder 31 and the outer diameter of the piston, and appropriately changing the sliding resistance of the piston 27 with respect to the lower sliding inner peripheral wall 33, The pressure in the container body 11 when the piston 27 starts to move can be controlled.

  As shown in FIG. 2 (d), when the piston 27 reaches the upper diameter-expanded inner peripheral wall 35 by the pressure in the container body of the carbon dioxide gas G that has become a predetermined value or more, the high-pressure carbon dioxide gas in the container body 11 G is released at once from the gap S between the upper diameter-enlarged inner peripheral wall 35 and the piston 27, and the powdered medicine 30 is jetted and diffused out of the cylinder 31 at a stretch by the wind pressure of the high-pressure carbon dioxide gas G in the container body 11.

Since the injection nozzle 37 is provided at the upper opening end of the cylinder 31, the injection nozzle 37 increases the flow velocity of the high-pressure gas released from the gap S between the piston 27 and the upper-side enlarged inner peripheral wall 35. The powdery medicine 30 in the cylinder 31 is more reliably injected and diffused out of the cylinder 31.
Further, by making the piston rod 24 have a cross-shaped cross section, a sufficient amount of high-pressure carbon dioxide gas G can pass toward the injection nozzle 37. Furthermore, since the rod end 25 provided at the lower end of the piston rod 24 abuts against the inner surface of the lid 21, the piston 27 is prevented from moving toward the injection nozzle 37, so that the wind pressure of the high-pressure carbon dioxide gas G It is possible to prevent the piston 27 pushed up in the cylinder 31 from blocking the injection nozzle 37.

  That is, the carbon dioxide gas G for injecting and diffusing the powdery medicine 30 is confined in the container body 11 until the gas pressure becomes equal to or higher than the predetermined value and the piston 27 reaches the upper diameter-expanding inner peripheral wall 35. When it reaches the inner diameter peripheral wall 35, it is released at once from the gap S with the upper enlarged inner diameter wall 35, so that it is injected from the upper opening end (the injection port of the injection nozzle 37) of the cylinder 31 at once. Therefore, the powder medicine injection device 1 can obtain the high-pressure carbon dioxide gas G without using an explosive reaction with heat.

Therefore, the powdery medicine injection device 1 of the present embodiment, like the conventional smoke type or heat transpiration type, generates a smoke by the heat of the heating element, or water that generates a medium other than the drug. There is no need to heat and heat the pesticide as a medicine using a pyrogen. As a result, heat is not applied to the insecticidal component as a drug impregnated in the calcium silicate of the powdery drug 30, and an insecticidal component that is weak against heat can also be used. Moreover, it is not necessary to dissolve an insecticidal component in a solvent or a liquefied gas as in the conventional aerosol type or pump type, and an unstable insecticidal component can be used in an insecticidal component having low solubility or a solution. In addition, by using an inert gas such as carbon dioxide as a medium for the powdered drug, there is no degradation of the powdered drug, an adverse effect on indoor furniture, and no indoor contamination.
According to the powdery drug injection device 1 and the powdery drug injection method of the present embodiment described above, an insecticide as a drug can be diffused without using a medium such as a gas or a solvent.

Constituent members such as a container main body, a lid, a cylinder, a piston, an injection nozzle, powder, an active ingredient of a drug, a drug-impregnated powder, a liquid and a gas generating agent according to the powdery drug injection device of the present invention are as described above. It is not limited to the structure of embodiment, A various form can be taken based on the meaning of this invention.
In the powdery medicine injection device 1 of the above embodiment, the upper opening end of the cylinder 31 provided with the injection nozzle 37 is vertically upward, and the lower opening end of the cylinder 31 to which the plunger 23 is inserted is downward in the vertical direction. However, as a matter of course, the direction of both opening ends of the cylinder 31 can take various directions such as an obliquely upward direction and a horizontal direction.

Hereinafter, the present invention will be described specifically by way of examples. However, the present invention is not limited only to these examples.
Example 1
First, in order to confirm the injection effect of the powdery drug injection device according to the present invention, d · dT-cyphenothrin (trade name: Gokyrat S, manufactured by Sumitomo Chemical Co., Ltd.) using the powdery drug injection device 1 is used. A floor surface fall amount measurement test was conducted. The test contents are shown below.

[Floor drop measurement test]
(Test method)
1. The room having a floor area of 13 m ² (length 360 cm × width 360 cm) shown in FIG. Two powdery drug injection devices 1 having the configuration shown in FIG. 1 are installed in a diagonal line at the center of the test area floor surface 100, and a plurality of positions 1 m and 2 m away from the powdery drug injection device 1 toward the four corners, respectively. Metal petri dishes (a) to (h) are installed on the plate.
2. The powdery medicine 30 is jetted using three kinds of powdery medicine injection devices (A) to (C), and the petri dishes (a) to (h) are collected after 1 hour. In addition, in order to eliminate the influence by the flow of the air flow in the room and evaluate the diffusion effect of the powdery medicine 30 by the powdery medicine injection device 1, the petri dish was collected under non-ventilated conditions.
3. From the collected petri dishes (a) to (h), the amount of d · dT-cyphenothrin of the powdery drug 30 is analyzed.
4). Based on the analysis results, the application amount per unit area of d · dT-cyphenothrin and the drop rate with respect to the application amount are calculated.
Tables 1 to 3 show the results of analysis and calculation by the floor drop measurement test.

(Test conditions)
1. Powder medicine injection device ・ Powder medicine injection device (A)
Container body 11: PET bottle having a volume of 280 ml Cylinder 31: After cutting the tip of the cylinder at a position of 0.5 ml of the cylinder 31B in an HSW syringe (trade name: 2 ml HSW NORM-JECT) having an inner diameter of 9.5 mm The cylinder 31B was fitted into the base end side of a pipette tip (product name: diamond tip D5000 easy-pack, product number: F161571) manufactured by GILSON with an inner diameter of the tip opening of 1.5 mm.
・ Powder medicine injection device (B)
The inner diameter of the tip opening of the pipette tip 31A in the powdery drug injection device (A) was 7 mm.
・ Powder medicine injection device (C)
The volume of the container body 11 in the powdery drug injection device (A) was 500 ml.
2. Powdered drug 30
100 mg of d · d-T-cyphenothrin was impregnated into 200 mg of fluorite to give a total amount of 300 mg (florite: d · d-T-cyphenothrin = 2: 1).
3. Petri dish (a)-(h)
Area: 63.6 cm ² / Petri dish 4. Gas generant powder powder injection device (A), (B)
Water 51: 100ml
Baking soda 41: 3.8 g
Citric acid 43: 2.9 g

Powder medicine injection device (C)
Water 51: 100ml
Baking soda 41: 7.5g
Citric acid 43: 5.8 g

In the test, two drug injection devices (A) to (C) were installed side by side on a diagonal line, and the amount of powdered drug processed was 300 mg, and the entire test was 600 mg.

  From Tables 1 to 3, it can be confirmed that the fluorite impregnated with d · dT-cyphenothrin can be diffused to a range of 2 m from the apparatus by the powdery drug injection device 1 of the present invention. Further, from Tables 1 and 3, it was confirmed that when the capacity of the container main body 11 is large, the amount of gas generated at the time of injection increases, and the powdery medicine 30 tends to have high diffusibility (fly far). .

  From the above results, it was found that the powdery drug injection device 1 shown in FIG. 1 is a very effective drug injection diffusion device capable of efficiently injecting and diffusing a drug in a wide space.

DESCRIPTION OF SYMBOLS 1 Powdery chemical | medical agent injection apparatus 11 Container main body 13 Upper end opening part 21 Cover body 23 Plunger 24 Piston rod 25 Rod end 27 Piston 30 Powdery chemical | medical agent 31 Cylinder 32 Lower end diameter reduction inner wall 33 Lower side sliding inner wall 35 Upper side diameter expansion inner peripheral wall 41 Baking soda (gas generating agent)
43 Citric acid (gas generating agent)
51 Water (liquid)

Claims (4)

A container body having an upper end opening;
A cylinder that is inserted into a lid that closes the upper end opening, and both opening ends face the inside and the outside of the container body;
The drug itself or the powdered drug impregnated in the powder and stored in the cylinder;
A piston that slides in an airtight manner on the lower sliding inner peripheral wall of the cylinder and has a gap with respect to the upper-diameter inner peripheral wall of the cylinder,
A powdery drug injection device characterized in that a reaction gas is generated in the container body and the piston is pushed up along the lower sliding inner peripheral wall.   The powdery medicine injection device according to claim 1, wherein an injection nozzle is provided at an upper opening end of the cylinder.   3. The powdery medicine injection device according to claim 2, wherein the piston that has reached the upper-diameter inner peripheral wall of the cylinder is prevented from moving toward the injection nozzle. 4. Generating a reaction gas in a container body having an upper end opening;
A piston containing a medicine itself or a powdery medicine in which a medicine is impregnated with a powder and sliding airtightly with respect to the lower sliding inner peripheral wall and having a gap with respect to the upper enlarged inner peripheral wall The upper end opening portion so that the lower opening end of the cylinder faces the inside of the container main body and the upper opening end of the cylinder faces the outside of the container main body. A process of attaching to,
And a step of injecting and diffusing the powdered medicine stored in the cylinder by pushing up the piston to the upper diameter-enlarged inner peripheral wall with a pressure in the container body of the reaction gas that has become a predetermined value or more. A powdery medicine injection method characterized by the above.

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