JP6270657B2 - Drug injection device and drug injection method - Google Patents

Description

  The present invention relates to a drug injection device and a drug injection method for spraying and diffusing a drug 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, smoking type and heat transpiration type insecticides are easily affected by heat because the insecticidal components are heated to extremely high temperatures, and the insecticidal components used may be limited. 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. Furthermore, in order to inject a liquid chemical into a mist, a high-pressure gas is required. However, in the case of an aerosol using a high-pressure flammable gas, handling properties are not good due to severe storage conditions.

  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.

  Therefore, the present invention has been made in view of such a situation, and provides a drug injection device and a drug injection method capable of suppressing the decomposition of a drug due to heat or the like and jetting and diffusing a powdery or liquid drug at a high pressure. The purpose is to provide.

The object of the present invention described above is achieved by the following configuration.
(1) a container body for containing a liquid;
A lid portion that closes the upper end opening of the container body, and a cylinder portion that is formed through the lid portion so that both opening ends face the inside and the outside of the container body, and are attached to the upper end opening. A first cap;
A piston that slides in an airtight manner on the sliding inner peripheral wall of the cylinder portion, and that defines a gap with respect to the expanded inner peripheral wall of the cylinder portion;
A restriction mechanism for restricting movement of the piston that moves from the sliding inner peripheral wall to the enlarged inner peripheral wall;
A medicine stored in a storage chamber defined by the expanded inner peripheral wall;
A lid that closes the lower end opening of the container body; a cylindrical body that is formed through the lid so that both open ends face the inside and outside of the container body; and the cylinder that extends upward from the container body. A second cap that has a sealing portion that seals the upper side opening of the body portion and is attached to the lower end opening;
A gas generating agent accommodated in the cylindrical portion to generate a reaction gas by reacting with the liquid in the container body;
A rupture member that is held by the second cap so as to be movable toward the sealing portion, releases the sealing state of the sealing portion, and allows the liquid to flow into the cylindrical portion;
A drug injection device comprising:

(2) A drug injection device configured as described in (1) above,
An inner wall surface of the first cap is provided with a return preventing mechanism that locks the piston that has moved to the inner diameter wall side of the enlarged diameter and prevents the piston from returning to the inner wall surface side of the sliding. Item 2. A medicine injection device according to Item 1.

(3) A drug injection device configured as described in (1) or (2) above,
The drug injection device according to claim 1 or 2, wherein the sealing state of the sealing portion formed of a sheet material is broken and released by a blade portion provided at a tip portion of the breaking member. .

(4) a step in which the inside of the container body is pressurized by the reaction gas generated in the container body;
A step of sliding the piston in an airtight manner by the pressure of the reaction gas from the sliding inner peripheral wall of the cylinder portion facing the inside and outside of the container body to the enlarged inner peripheral wall;
A step of applying a predetermined movement restricting force to the piston moving from the sliding inner peripheral wall to the enlarged inner peripheral wall;
The medicine stored in the cylinder part is formed by the piston moving from the sliding inner peripheral wall to the enlarged inner peripheral wall against the movement restricting force, and the inside of the container body and the cylinder part communicate with each other. Is diffused by the wind pressure of the reaction gas,
A method for injecting medicine, comprising:

According to the medicine injection device having the above configuration (1), when the breaking member held by the second cap receives the operating force and moves toward the sealing portion, the breaking member seals the sealing portion. The state is released and the liquid in the container body flows into the cylindrical body. The liquid that has flowed into the cylindrical body is reliably mixed with the gas generating agent accommodated in the cylindrical body. The mixed gas generating agent and the liquid react to generate a reactive gas, whereby the inside of the container main body becomes a high pressure. When the pressure in the container body exceeds a predetermined value, the piston in the cylinder part is moved from the sliding inner peripheral wall against the movement restricting force of the restricting mechanism. When the piston reaches the inner diameter wall of the enlarged diameter, the high-pressure reaction gas in the container body is released from the gap between the inner diameter wall of the enlarged diameter wall and the piston at once, and the drug is discharged from the storage chamber by the wind pressure of the high-pressure gas in the container body. It is injected and diffused at once.
That is, the reaction gas for injecting and diffusing the drug is confined in the container body until the pressure in the container body exceeds a predetermined level and the piston that has moved against the movement restricting force of the restricting mechanism reaches the enlarged inner peripheral wall. When the piston reaches the enlarged inner peripheral wall, the piston is released at a stroke from the gap with the enlarged inner peripheral wall, and is thus injected from the open end on the outside of the cylinder portion. Therefore, a high-pressure reaction gas can be obtained without using a high-pressure combustible gas or an explosive reaction with heat. Here, the pressure of the reactive gas injected from the outside opening end of the cylinder portion can be easily set by appropriately setting the movement restricting force of the restricting mechanism.
Therefore, it is not necessary to smoke the smoke by burning the drug as in the prior art or to heat the drug by using a hydropyrogenic agent that indirectly heats the foaming agent. As a result, heat is not applied to the 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 medicine injection device having the configuration (2), the piston that has reached the enlarged inner peripheral wall and injected the high-pressure reaction gas to the outside of the cylinder portion is locked by the return prevention mechanism and moved toward the sliding inner peripheral wall. Therefore, the piston after the operation does not block the cylinder portion. Therefore, in the medicine injection device, the piston that has returned to the sliding inner peripheral wall after completion of the injection operation blocks the cylinder portion, and the gas generating agent and the liquid remaining in the container main body continue to generate reaction gas, It is possible to prevent the pressure in the main body from rising carelessly.

  According to the medicine injection device having the configuration (3), the sealing portion formed of the sheet material is broken by the blade portion provided at the distal end portion of the breaking member, and the sealed state is reliably released. Therefore, even if the operating force for moving the breaking member toward the sealing portion is not large, the liquid in the container main body can be surely flowed into the cylindrical body portion and can be reliably mixed with the gas generating agent.

According to the medicine injection method having the above configuration (4), the container body is pressurized by the reaction gas generated in the container body and resists a predetermined movement regulating force applied to the piston in the cylinder part. When the pressure inside the main body becomes a predetermined value or more, the piston is moved in an airtight manner from the sliding inner peripheral wall of the cylinder portion to the enlarged inner peripheral wall. When the piston reaches the inner diameter wall of the enlarged diameter, the inside of the container body communicates with the cylinder portion, and the high-pressure reaction gas in the container main body is released from the gap between the inner diameter wall of the enlarged diameter and the piston at a stretch. The medicine is injected and diffused out of the cylinder at a stretch by the wind pressure of the high-pressure gas.
That is, the reaction gas for injecting and diffusing the drug is confined in the container body until the pressure in the container body reaches a predetermined value or more and the piston that has moved against the movement restriction force reaches the inner diameter wall of the expanded diameter. When the piston reaches the expanded inner peripheral wall, the piston is released from the gap with the expanded inner peripheral wall at a stretch, and is thus injected out of the cylinder part. Therefore, a high-pressure reaction gas can be obtained without using a high-pressure combustible gas or an explosive reaction with heat. Here, the pressure of the reaction gas injected out of the cylinder portion can be easily set by appropriately setting the movement restricting force.
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 drug. As a result, it is possible to use a drug that is not susceptible to heat and is not susceptible to heat. 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 medicine injection device and the medicine injection method of the present invention, it is possible to suppress the decomposition of the medicine due to heat or the like and to inject and diffuse the powdery or liquid medicine at a high pressure. Therefore, it is possible to use chemicals that are easily decomposed by heat. Moreover, since high pressure combustible gas like aerosol is not used, storage and handling are easy.
Furthermore, since the medicine injection device and the medicine injection method of the present invention do not require the use of a fixed power source or fire heat, there is no fear of a fire, etc., and it is safe and does not require a large-scale device, so it can be easily carried. It can be used even in places where there is no equipment such as a power source.

  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 whole perspective view showing the outline of the medicine injection device concerning one embodiment of the present invention. It is AA sectional drawing of the chemical | medical agent injection apparatus shown in FIG. It is BB sectional drawing of the chemical | medical agent injection apparatus shown in FIG. It is explanatory drawing for demonstrating the procedure which carries out the injection diffusion of the chemical | medical agent using the chemical | medical agent injection apparatus shown in FIG. FIG. 2 is an enlarged cross-sectional view of a main part for explaining a return prevention mechanism in the medicine injection device shown in FIG. 1, wherein (a) shows a state before the piston is moved by the reaction gas, and (b) is a piston by the reaction gas. The state which moved to the diameter expansion inner peripheral wall side and the return to the sliding inner peripheral wall side was prevented by the return prevention mechanism is shown. FIG. 5 is an enlarged cross-sectional view of a main part showing a modification of the breaking member shown in FIG. 2.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 3, the medicine ejection device 1 according to an embodiment of the present invention is mounted on a container body 11 for containing water (liquid) 90 and an upper end opening 13 of the container body 11. A first cap 81, a piston 63 that is inserted into the cylinder portion 54 of the first cap 81, a powdered medicine 30 that is a medicine stored in the storage chamber 58 of the first cap 81, and a lower end of the container body 11. A second cap 23 attached to the opening 15; a gas generating agent 43 accommodated in the cylindrical portion 26 of the second cap 23 for reacting with water 90 in the container body 11 to generate a reactive gas; A pressing part 31 that is held by the second cap 23 so as to be movable toward the stop part 41 and breaks the sealing part 41 to mix the gas generating agent 43 into the water 90 in the container body 11 is provided at the tip part. And a breaking member 33.

  The container main body 11 of the present embodiment is a pressure-resistant container integrally formed of a resin such as PET (polyethylene terephthalate) having an upper end opening 13 and a lower end opening 15. 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 first cap 81 of the present embodiment includes a cap portion 52 that closes the upper end opening portion 13, and a cap body that is formed through the lid portion 52 so that both opening ends face the inside and the outside of the container body 11. 51 and a cap 71 that covers the upper opening of the cap body 51 and defines a storage chamber 58.

  The lid 52 is detachably attached to the upper end opening 13 by screwing a screw thread 53 to a screw thread 14 provided on the outer peripheral surface of the upper end opening 13 of the container body 11. A screw thread 57 to which the cap 71 is screwed is provided at the upper end portion of the cylinder portion 54.

Further, the cylinder portion 54 of the cap body 51 communicates the inside and the outside of the container body 11 via the cap 71, the sliding inner peripheral wall 55 on which the accommodated piston 63 slides in an airtight manner, and the piston 63. And an enlarged inner peripheral wall 56 that defines a gap (S) (see FIG. 4C).
An injection nozzle 75 is formed on the cap 71 attached to the upper end opening of the cylinder portion 54. The injection nozzle 75 is sealed with the seal member 8.
Further, a plurality of flexible locking arms constituting a return preventing mechanism for locking the piston 63 moved to the enlarged inner peripheral wall 56 side and preventing the return to the sliding inner peripheral wall side on the inner wall surface of the cap 71. 72 is provided.

  In the piston 63 of the present embodiment, an O-ring 82 attached to the outer peripheral portion of the cylindrical piston main body 64 on the cap main body 51 side slides in an airtight manner with respect to the sliding inner peripheral wall 55 of the cylinder portion 54. A gap (S) is defined with respect to the enlarged inner peripheral wall 56 of the cylinder portion 54.

  The piston 63 is pressed and urged toward the container main body 11 by a compression coil spring (regulation mechanism) 80 interposed between the piston 63 and the cap 71. The compression coil spring 80 is for applying a predetermined resistance force to the piston 63 that moves from the sliding inner peripheral wall 55 to the enlarged inner peripheral wall 56 by the pressure of the reaction gas, thereby restricting the movement. The restriction mechanism of the present invention is not limited to the compression coil spring 80 of the present embodiment. For the piston 63 that moves by the pressure of the reaction gas, such as the frictional resistance force due to the seal pressure of the O-ring 82 against the sliding inner peripheral wall 55 and the adhesive force of the adhesive applied between the sliding inner peripheral wall 55 and the piston 63. Various restriction mechanisms that can impart movement restriction force can be used.

  Further, a plurality of pistons 63 that are attached to the sliding inner peripheral wall 55 and pressed and urged by the compression coil springs 80 on the outer peripheral portion of the piston main body 64 on the cap 71 side are restricted from moving toward the container main body 11. A locking projection 65 is provided. Further, the locking projection 65 constitutes a return prevention mechanism together with the flexible locking arm 72 described above.

  The powdery medicine 30 accommodated in the accommodation chamber 58 of the first cap 81 is, for example, calcium silicate (trade name, Florite RN, manufactured by Tokuyama Co., Ltd.), which is an inorganic powder, and cifenotrin (pyrethroid insecticide) as a medicine. Agent) or dinotefuran, which is a non-volatile insecticide, and the like. In addition, as a chemical | medical agent impregnated or mixed with powder, not only the insecticide which contains an insecticidal component as an active ingredient but various chemicals, such as a fragrance | flavor, a deodorizing agent, 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 | medical agent which is powder itself can also be used as a powdery chemical | medical agent. Of course, the liquid medicine can be stored in the storage chamber 58 of the first cap 81.

Examples of the insecticide include insecticide chrysanthemum extract, natural pyrethrin, praretrin, imiprotorin, phthalthrin, allethrin, bifenthrin, resmethrin, phenothrin, ciphenothrin, permethrin, cypermethrin, etofenprox, cyfluthrin, deltamethrin, fenvalerate, fenpropatrin Pyrethroid insecticides such as, silafluophene, transfluthrin, metfurflurin, profluthrin; organophosphorus insecticides such as fenitrothion, diazinon, marathon, pyridafenthion, prothiophos, phoxime, chlorpyrifos, dichlorvos; carbamates such as carbaryl, propoxur, mesomil, thiodicarb Insecticides; oxadiazole insecticides such as methoxadiazone; fipro Phenylpyrazole insecticides such as Le; sulfonamide insecticides such as amidoflumet; dinotefuran, neonicotinoid insecticides such as imidacloprid, pyrrole insecticides such as chlorfenapyr like. As these insecticides, only 1 type may be used and 2 or more types may be used.
Examples of bactericides include phenolic bactericides such as triclosan and isopropylmethylphenol; carbanide bactericides such as trichlorocarbanilide; pyridine bactericides such as zinc pyrithione; and cationic cations such as cetylpyridinium chloride and benzalkonium chloride. Bactericides such as amine bactericides such as trialkyltriamine; imidazole bactericides such as enilconazole.
Although it does not restrict | limit especially as a fragrance | flavor, For example, the natural fragrance | flavor which consists of essential oil components, such as mint oil, peppermint oil, spearmint oil, rush, cypress, citronella, citral, citronellal, lemon, lemongrass, orange, eucalyptus, lavender; Examples include artificial fragrances such as geraniol, citronellal, eugenol, undecalactone, limonene, and phenethyl alcohol; and natural fragrances and blended fragrances obtained by adjusting these artificial fragrances.

The second cap 23 of the present embodiment includes a lid 21 that closes the lower end opening 15 of the container body 11, and a cylindrical body 26 that is formed through the lid 21 so that both open ends face the inside and the outside of the container body 11. And a sealing portion 41 that seals the upper-side opening of the cylindrical portion 26 extending inward of the container main body 11.
The sealing part 41 is formed by, for example, fixing the outer peripheral part of a circular sheet material to the upper side opening of the cylindrical part 26 by heat sealing or an adhesive. The sealing portion 41 has a sufficient fixing force capable of supporting the weight of the water 90 accommodated in the container body 11, but a pressing force of a predetermined level or more is applied by the pressing portion 31 of the breaking member 33. And the fixed part in an outer peripheral part is comprised so that it may fracture | rupture and peel.

The breaking member 33 according to the present embodiment is provided with a rod part 35 having a cross-shaped cross section perpendicular to the axis and a base end side of the rod part 35, and slides in an airtight manner with respect to the cylindrical part 26 via an O-ring 38. A cylindrical piston portion 34, a rod end 36 provided at the proximal end of the rod portion 35, a pressing portion 31 provided at the distal end of the rod portion 35, and the rod portion 35 extending from the piston portion 34. Four flexible locking arms 37.
The breaking member 33 is held by the cylindrical portion 26 so that the pressing portion 31 can move toward the sealing portion 41. The rod portion 35 defines an accommodation space for accommodating the gas generating agent 43 between the rod portion 35 and the cylindrical portion 26.

It should be noted that the breaking member 33 held by the cylindrical body portion 26 inadvertently moves toward the sealing portion 41 between the lid portion 21 of the second cap 23 and the rod end 36 of the breaking member 33. A stopper member 91 that prevents this is detachably provided.
The stopper member 91 includes a C-shaped gripping portion 93 attached to the piston portion 34 and a knob 92 serving as an operation portion when the gripping portion 93 is removed.

  In this embodiment, the liquid accommodated in the container main body 11 is water 90, and the gas generating agent 43 accommodated in the cylindrical portion 26 of the second cap 23 is sodium bicarbonate and citric acid. Therefore, when the water 90 in the container body 11 is caused to flow into the cylindrical body portion 26 and the water 90 and the gas generating agent 43 are mixed, the water 90 and the gas generating agent 43 react to react with carbon dioxide gas (G). ) Occurs. Needless to say, the liquid and the gas generating agent are not limited to water 90, baking soda and citric acid, 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, a procedure for injecting and diffusing an insecticide using the drug injection device 1 of the above embodiment will be described with reference to FIGS. 3 and 4A to 4C. The drug injection device 1 is used to spray insecticides to exterminate insects such as cockroaches and house dust mites, and to disperse disinfectants, fragrances, deodorants, etc. throughout the room. Used to be placed on the center of the floor.

As shown in FIG. 3, a predetermined amount of water 90 is filled in the container main body 11 of the medicine injection device 1 in advance. Since the container 90 is filled with the water 90 in advance, the medicine injection device 1 can be used as it is at the carrying destination. The water 90 can also be injected into the container body 11 later from the upper end opening 13 of the container body 11 opened by removing the first cap 81 of the medicine injection device 1. The amount of water 90 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 90 may be poured. After injecting water 90 into the container main body 11, the first cap 81 is screwed into the upper end opening 13 to seal the inside of the container main body 11.
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, as shown in FIG. 4A, the seal member 8 that seals the injection nozzle 75 is peeled off and provided between the lid portion 21 of the second cap 23 and the rod end 36 of the breaking member 33. The stopper member 91 is removed.
Then, with the rod end 36 on the floor, the container body 11 is pushed downward.

The breaking member 33 that has moved toward the sealing portion 41 in response to the pushing operation force is broken so that the pressing portion 31 peels off the fixing portion at the outer peripheral portion of the sealing portion 41 as shown in FIG. To do. Then, the locking portion 37 a of the flexible locking arm 37 is locked to the upper opening end 26 a of the cylindrical body portion 26.
Therefore, the water 90 in the container main body 11 flows into the cylindrical body portion 26, and the gas generating agent 43 and the water 90 accommodated in the cylindrical body portion 26 are mixed in the container main body 11.
Then, the gas generating agent 43 consisting of sodium bicarbonate and citric acid reacts in the water 90 to generate carbon dioxide (G) as a reactive gas. Carbon dioxide (G) generated in the container body 11 gradually increases, and the inside of the container body 11 becomes high pressure. At this time, the breaking member 33 is subjected to a force to be pushed down by the pressure in the container body 311, but the locking portion 37 a of the flexible locking arm 37 is engaged with the upper opening end 26 a of the cylindrical body 326. Since it is stopped, it will not be pushed down.

When the pressure of the carbon dioxide gas (G) in the container main body 11 becomes equal to or higher than a predetermined pressure, the piston 63 in the cylinder portion 54 is pushed up against the pressing biasing force (movement restricting force) of the compression coil spring 80, and slides. It is moved from the dynamic inner peripheral wall 55 to the expanded inner peripheral wall 56. At this time, since the O-ring 82 is attached to the outer peripheral portion of the piston main body 64 and airtightness between the inner peripheral wall 55 and the sliding inner peripheral wall 55 is secured, the pressure of carbon dioxide (G) leaks to the piston 63. It works effectively.
In addition, the predetermined pressure in the container main body 11 for moving the piston 63 in the cylinder part 54 to the diameter expansion inner peripheral wall 56 can be easily controlled by changing the repulsive force of the compression coil spring 80 suitably.

  When the O-ring 82 in the piston 63 reaches the enlarged inner peripheral wall 56 due to the pressure of the carbon dioxide gas (G) in the container body 11 exceeding the predetermined value, the high-pressure carbon dioxide gas (G) in the container body 11 expands. The powder medicine 30 in the storage chamber 58 is released from the gap (S) between the inner diameter peripheral wall 56 and the piston main body 64 at a stroke, and the wind pressure of the high-pressure carbon dioxide (G) in the container main body 11 causes the cylinder portion 54. It is sprayed and diffused all at once. At this time, the piston 63 is held in the enlarged inner peripheral wall 56 by the engaging protrusion 65 being engaged with the claw portion 72 a of the flexible engaging arm 72 of the cap 71, and toward the sliding inner peripheral wall 55. Is prevented from returning. Therefore, the piston 63 after the operation does not block the cylinder portion 54. Therefore, in the medicine injection device 1, the piston 63 that has returned to the sliding inner peripheral wall 55 after the completion of the injection operation blocks the cylinder portion 54, and the gas generating agent and liquid remaining in the container body 11 generate a reaction gas. By continuing, it can prevent that the pressure in the container main body 11 rises carelessly.

  Since the cap 71 on which the injection nozzle 75 is formed is attached to the upper end opening of the cylinder portion 54, the high-pressure gas released at once from the gap (S) between the piston 63 and the expanded inner peripheral wall 56 is injected. The flow rate is increased by the nozzle 75, and the powdered medicine 30 in the storage chamber 58 is more reliably jetted and diffused out of the cylinder portion 54.

  That is, the carbon dioxide gas (G) for injecting and diffusing the powdered medicine 30 has a gas pressure of a predetermined value or more, and the O-ring 82 of the piston 63 moved against the repulsive force of the compression coil spring 80 has an enlarged inner peripheral wall. The cylinder is confined in the container main body 11 until reaching 56, and when the O-ring 82 of the piston 63 reaches the enlarged inner peripheral wall 56, it is released from the gap (S) with the enlarged inner peripheral wall 56 at once. It is injected at a stroke from the outside opening end of the portion 54 (the injection nozzle 75 of the cap 71). Therefore, the medicine injection device 1 can obtain a high-pressure carbon dioxide gas (G) without using a high-pressure combustible gas or an explosive reaction accompanied by heat.

Therefore, the drug injection device 1 of the present embodiment uses a foaming agent that smokes the smoke agent with the heat of the heating element or generates a medium other than the drug, such as the conventional smoke type or heat transpiration type. There is no need to heat and vaporize the pesticide as a drug. 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 a low-reactivity gas such as carbon dioxide as a powder or liquid drug medium, decomposition of the powder or liquid drug, adverse effects on indoor furniture, indoor pollution, etc. There is no.
According to the medicine injection device 1 of the present embodiment described above, an insecticide as a powdery or liquid medicine can be injected and diffused without using a medium such as a gas or a solvent.

In addition, the container main body according to the medicine injection device of the present invention, the lid portion that closes the upper end opening, the cylinder portion, the first cap, the piston, the lid portion that closes the lower end opening, the cylindrical portion, the sealing portion, the second cap, Constituent members such as a breaking member, a pressing part, a spray nozzle, powder, an active ingredient of a drug, a powdery or liquid drug, a liquid and a gas generating agent are not limited to the configuration of the above embodiment, and the present invention. Various forms can be taken based on the purpose of
In the medicine injection device 1 of the above-described embodiment, the pressing portion 31 provided at the distal end portion of the breaking member 33 presses the sealing portion 41 to break so as to peel off the fixing portion at the outer peripheral portion. However, the shape of the tip portion of the breaking member 33 is not limited to this, and various shapes can be adopted as long as the sealing portion 41 is broken and the gas generating agent 43 and the water 90 can be mixed. Of course.

For example, as shown in FIG. 6, a blade portion 32 may be provided at the distal end portion of the breaking member 33. In this case, the blade portion 32 of the breaking member 33 that has moved toward the sealing portion 41 in response to the pushing operation force breaks the sealing portion 41 that seals the upper-side opening of the cylindrical portion 26, and is in a sealed state. Can be reliably released.
Therefore, even if the operating force for moving the breaking member 33 toward the sealing portion 41 is not large, the water 90 in the container main body 11 is surely flowed into the cylindrical body portion 26 and is reliably mixed with the gas generating agent 43. Can be made.

Here, the features of the above-described embodiments of the medicine injection device and the medicine injection method according to the present invention will be briefly summarized and listed below.
[1] A container body (11) for containing a liquid (water 90);
A lid portion (52) that closes the upper end opening (13) of the container body (11), and a cylinder that is formed through the lid portion (52) so that both open ends face the inside and the outside of the container body (11). A first cap (81) having a portion (54) and attached to the upper end opening (13);
The cylinder portion (54) slides in an airtight manner with respect to the sliding inner peripheral wall (55) and defines a gap (S) with respect to the enlarged inner peripheral wall (56) of the cylinder portion (54). A piston (63) to perform,
A restriction mechanism (compression coil spring 80) for restricting movement of the piston (63) moving from the sliding inner peripheral wall (55) to the enlarged diameter inner peripheral wall (56);
A drug (powder drug 30) stored in a storage chamber (58) defined by the expanded inner peripheral wall (56);
A lid (21) that closes the lower end opening (15) of the container body (11), and a cylinder that is formed through the lid (21) so that both open ends face the inside and the outside of the container body (11). A lower end opening portion having a body portion (26) and a sealing portion (41) for sealing an upper side opening of the cylindrical body portion (26) extending upward from the container main body (11). A second cap (23) attached to (15);
A gas generating agent (43) accommodated in the cylindrical portion (26) to generate a reactive gas (carbon dioxide gas G) by reacting with the liquid (water 90) in the container body (11);
The cylindrical part is held by the second cap (23) so as to be movable toward the sealing part (41), and the sealing state of the sealing part (41) is released to allow the liquid (water 90) to flow. (26) a breaking member (33) for flowing into the interior;
A drug injection device (1) comprising:

[2] The inner wall surface of the first cap (81) (the inner wall surface of the cap 71) is engaged with the piston (63) moved to the enlarged inner peripheral wall (56) side, and the sliding inner peripheral wall. (55) The medicine ejection device (1) according to the above [1], wherein a return prevention mechanism (a locking projection 65 and a flexible locking arm 72) for preventing the return to the side is provided.

[3] The sealing state of the sealing part (41) formed of a sheet material is broken and released by a blade part (32) provided at a tip part of the breaking member (33). The medicine injection device (1) according to the above [1] or [2].

[4] A step of pressurizing the inside of the container body (11) by the reaction gas (carbon dioxide gas G) generated in the container body (11);
From the sliding inner peripheral wall (55) of the cylinder portion (54) facing the inside and outside of the container body (11) to the enlarged inner peripheral wall (56), the piston (63) is driven by the pressure of the reaction gas (carbon dioxide gas G). The process of sliding airtightly,
A step of applying a predetermined movement regulating force to the piston (63) moving from the sliding inner peripheral wall (55) to the enlarged diameter inner peripheral wall (56);
The piston (63) moves from the sliding inner peripheral wall (55) to the enlarged diameter inner peripheral wall (56) against the movement restricting force, and the inside of the container main body (11) and the cylinder part (54). And the step of causing the drug (powdered drug 30) stored in the cylinder part (54) to be sprayed and diffused by the wind pressure of the reaction gas (carbon dioxide gas G).
A method for injecting medicine, comprising:

DESCRIPTION OF SYMBOLS 1 Drug injection apparatus 11 Container main body 13 Upper end opening part 21 Cylindrical guide member 23 2nd cap 26 Cylindrical part 30 Powdery chemical | medical agent (medicine)
31 Pressing portion 33 Breaking member 41 Sealing portion 43 Gas generating agent 52 Lid portion 54 Cylinder portion 55 Sliding inner peripheral wall 56 Expanded inner peripheral wall 58 Housing chamber 63 Piston 71 Cap 80 Compression coil spring (regulator mechanism)
81 1st cap 90 Water (liquid)

Claims (4)

A container body for containing a liquid;
A lid portion that closes the upper end opening of the container body, and a cylinder portion that is formed through the lid portion so that both opening ends face the inside and the outside of the container body, and are attached to the upper end opening. A first cap;
A piston that slides in an airtight manner on the sliding inner peripheral wall of the cylinder portion, and that defines a gap with respect to the expanded inner peripheral wall of the cylinder portion;
A restriction mechanism for restricting movement of the piston that moves from the sliding inner peripheral wall to the enlarged inner peripheral wall;
A medicine stored in a storage chamber defined by the expanded inner peripheral wall;
A lid that closes the lower end opening of the container body; a cylindrical body that is formed through the lid so that both open ends face the inside and outside of the container body; and the cylinder that extends upward from the container body. A second cap that has a sealing portion that seals the upper side opening of the body portion and is attached to the lower end opening;
A gas generating agent accommodated in the cylindrical portion to generate a reaction gas by reacting with the liquid in the container body;
A rupture member that is held by the second cap so as to be movable toward the sealing portion, releases the sealing state of the sealing portion, and allows the liquid to flow into the cylindrical portion;
A drug injection device comprising:   An inner wall surface of the first cap is provided with a return preventing mechanism that locks the piston that has moved to the inner diameter wall side of the enlarged diameter and prevents the piston from returning to the inner wall surface side of the sliding. Item 2. A medicine injection device according to Item 1.   The drug injection device according to claim 1 or 2, wherein the sealing state of the sealing portion formed of a sheet material is broken and released by a blade portion provided at a tip portion of the breaking member. . A step in which the inside of the container body is pressurized by the reaction gas generated in the container body;
A step of sliding the piston in an airtight manner by the pressure of the reaction gas from the sliding inner peripheral wall of the cylinder portion facing the inside and outside of the container body to the enlarged inner peripheral wall;
A step of applying a predetermined movement restricting force to the piston moving from the sliding inner peripheral wall to the enlarged inner peripheral wall;
The medicine stored in the cylinder part is formed by the piston moving from the sliding inner peripheral wall to the enlarged inner peripheral wall against the movement restricting force, and the inside of the container body and the cylinder part communicate with each other. Is diffused by the wind pressure of the reaction gas,
A method for injecting medicine, comprising:

Images