JP2020103805A - Medicine injection tool - Google Patents

Abstract

To provide a medicine injection tool that can be used in a preferable hygienic state.SOLUTION: A medicine injection tool for injecting flowable medicine into a body comprises: a long-sized insertion part 32 to be inserted into the body from a side of one end thereof; and a storage container 31 in which flowable medicine is stored, the storage container having an opening part 34 connectable to the other end of the insertion part 32. The insertion part 32 comprises: a medicine flow passage part 38, formed inside the insertion part, through which flowable medicine pushed out from the storage container 31 is led; and a medicine discharge hole 43 making the medicine flow passage part 38 communicate with the outside. The medicine flow passage part 38 has an opening end 39 that is open at the other end of the insertion part 32. The opening end 39 of the medicine flow passage part has at least one or more acute protrusions 40 and is configured to be capable of being implanted in a lid part 35 provided at the opening part 34 of the storage container.SELECTED DRAWING: Figure 4

Description

The present invention relates to a drug injection device, and more particularly to a drug injection device for injecting a fluid drug into the body.

Recently, various fluid drugs are often injected into the human body for various purposes. For example, it can be used in a wide variety of ways, such as administering a cleaning solution to clean female genitals, contraceptive drug solutions for contraception, and drug solutions for treatment of hemorrhoids, sexually transmitted diseases, etc. Over.

Since the inner part of the human body such as the genitals and anus is the part where the mucous membrane is exposed, it is very sensitive to external stimuli, so the mucous membrane is easily damaged or contaminated. Therefore, in order to administer various fluid drugs as described above, it is necessary to exercise extreme caution.

Conventionally, in order to improve the inconvenience of manually administering a fluid drug as described above, a drug injection device capable of administering the fluid drug into the human body has been devised. As such a drug injection device, for example, as disclosed in Patent Document 1, a plastic cylinder having a drug discharge hole formed at its tip is provided, and a push rod (piston) provided in the cylinder is used as a cylinder. It adopts a method of pushing toward the tip, and the fluid medicine is made to flow out from a medicine ejection hole provided at the tip of the cylinder.

JP, 2014-004309, A

As described above, the conventionally known drug injection device is a so-called syringe type, and the operability when the user injects the liquid drug into the body cavity such as the vagina and anus of the user is not so good. There was a problem. Therefore, the insertion portion for inserting into the body is connected to the storage container for storing the liquid medicine, the peripheral surface of the storage container is grasped and compressed, and the liquid medicine stored inside is squeezed out. Development of a drug injection device of the type that discharges from 32 has been considered.

However, when using this type of drug injection device, the user himself/herself peels off the lid such as the ceiling seal that closes the mouth provided in the storage container before connecting the storage container and the insertion part. Therefore, further improvement is desired from the viewpoint of hygiene.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a drug injection device that can be used in a preferable hygienic state.

The above-mentioned object of the present invention is a drug injection device for injecting a fluid drug into a body, which is connectable to a long insertion part inserted into the body from one end side and the other end part of the insertion part. With a storage container having a mouth portion, the liquid medicine is stored, the insertion portion is formed inside, a drug flow path portion to which the liquid medicine extruded from the storage container is guided, The drug channel part and a drug discharge hole communicating with the outside are provided, and the drug channel part is provided with an opening end that opens at the other end of the insertion part. The opening end is provided with at least one or more sharp projections, and is configured to be pierceable into a lid provided at the mouth of the storage container. ..

In this drug injection device, a male screw portion is formed on the outer surface of the mouth portion of the storage container, and the other end of the insertion portion is a female screw with which the male screw portion of the mouth portion is screwed. It may be configured such that it has a concave portion in which the portion is formed, and the opening end portion of the drug channel portion is arranged in the concave portion.

Further, the opening end of the medicine flow path may be formed in a bamboo spear shape.

In addition, the other end of the insertion portion may be configured to include a bulging portion that bulges in a direction perpendicular to a connecting direction of the storage container to the insertion portion.

Further, the bulging portion may be configured such that a cross-sectional shape in a direction perpendicular to a connecting direction of the storage container with the insertion portion is formed into an elliptical shape.

According to the present invention, it is possible to provide a drug injection device that can be used in a preferable hygiene state.

It is a schematic perspective view regarding the medicine injection device which concerns on this invention. It is a schematic structure sectional view showing a section along a longitudinal axis of a medicine injection device concerning the present invention. It is a schematic structure sectional view showing the BB section of Drawing 2. (A) is sectional drawing of the storage container with which the chemical|medical agent injection device which concerns on this invention is equipped, (b) is sectional drawing of an insertion part. It is a principal part expanded sectional view for demonstrating the opening edge part of the chemical|medical agent flow path part with which the chemical|medical agent injection device which concerns on this invention is equipped. FIG. 4 is a plan view of the medicine injection device as viewed in the direction of arrow C in FIG. 3. It is explanatory drawing for demonstrating the modification of the chemical|medical agent injection device which concerns on this invention. It is explanatory drawing for demonstrating the further modification of the chemical|medical agent injection device which concerns on FIG.

A drug injection device 200 according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic configuration perspective view of a drug injection device 200 according to the present invention, and FIG. 2 is a schematic configuration cross-sectional view showing a cross section along the longitudinal axis of the drug injection device 200. FIG. 3 is a schematic configuration sectional view showing a BB section of FIG. 2. Each figure is partially enlarged/reduced to facilitate understanding of the configuration.

The drug injection device 200 according to the present invention is a device for injecting a fluid drug into a body cavity (body) such as the vagina or anus. A wide variety of agents can be used as the fluid agent, and examples thereof include a cleaning agent, a contraceptive agent, an anesthetic agent, an enema agent, an antipyretic agent, and a lubricant. Further, as the form of the fluid drug, various forms such as lotion form, gel form and jelly form can be adopted.

As shown in FIGS. 1 to 3, this medicine injection device 200 includes a storage container 31 and an insertion portion 32, and grasps and compresses the peripheral surface of the storage container 31 to squeeze out the fluid medicine inside. It is configured as an injection device of the type that discharges from the insertion portion 32.

The storage container 31 is a flexible container, and includes a storage portion 33 in which the liquid medicine is stored. Further, the storage container 31 is provided with a mouth portion 34 at the tip end thereof through which the liquid medicine flows out. The storage container 31 is configured to be connectable to the other end portion 32b of the insertion portion 32 via the mouth portion 34. Further, as shown in the cross-sectional view of FIG. 4A, a lid portion 35 such as a ceiling seal that closes the mouth portion 34 is adhered to the mouth portion 34 and is not connected to the insertion portion 32. Is configured so that the fluid drug inside does not flow out through the mouth 34. A male screw portion 36 is formed on the outer peripheral surface of the mouth portion 34. Regarding the material forming the storage container 31, the storage container 31 itself has flexibility so that the user can grasp and compress and deform it so that the liquid medicine inside can flow out to the outside through the mouth portion 34. The material is not particularly limited as long as it is a material. As the storage container 31, for example, a blow molded tube or an extrusion molded tube using a plastic resin raw material can be preferably used. Further, the lid portion 35 is not limited to the ceiling seal adhered to the mouth portion 34, and may be, for example, a resin portion that is integrally molded with the mouth portion 34 and closes the opening of the mouth portion 34. It can also be configured. Alternatively, the cap provided on the mouth portion 34 may be configured as the lid portion 35.

The insertion portion 32 is inserted into the body cavity (body) such as the vagina or anus of the human body from the distal end side 32a thereof, and is inserted into the body as shown in the cross-sectional views of FIG. 2, FIG. 3, and FIG. 4(b). Is formed in a long shape that extends along the insertion direction. The length of the insertion portion 32 is preferably set in the range of 50 mm to 100 mm when the drug injection device 200 is configured to clean the inside of the vagina. A bulging portion 37 is formed on the. The tip of the insertion portion 32 is formed to have a smooth curved surface so that the user does not feel pain when the insertion portion 32 is inserted into the body. Further, the insertion portion 32 is formed as a curved surface as a whole, and is formed so that its cross section becomes elliptical. Here, the insertion portion 32 and the bulging portion 37 are preferably formed from a plastic resin raw material. Moreover, it is preferable that the insertion portion 32 and the bulging portion 37 are integrally molded.

In addition, the insertion section 32 includes a medicine flow path section 38 through which the medicine pushed out from the storage section 33 is guided, and a medicine ejection hole 43 that connects the medicine flow path section 38 and the outside. The drug channel portion 38 is formed inside the insertion portion 32. The medicine flow path portion 38 is formed so as to extend along the longitudinal direction of the insertion portion 32, and includes an open end portion 39 that opens at the other end portion of the insertion portion 32. It should be noted that the end portion of the drug flow path portion 38 opposite to the opening end portion 39 (end portion on the distal end side 32a of the insertion portion 32) extends to the vicinity of the distal end portion inside the insertion portion 32. However, it is configured so as not to open at the tip of the insertion portion 32. The open end portion 39 of the medicine flow path portion 38 includes at least one or more sharp protrusions 40 and is configured to be pierceable into a lid portion 35 such as a ceiling seal provided in the mouth portion 34 of the storage container 31. Has been done. Here, in the present embodiment, the medicine flow path portion 38 is formed so that the axis of the medicine flow path portion 38 overlaps with the axis of the insertion portion 32, but the invention is not limited to such a mode, and The medicine flow path section 38 may be formed such that the axis of the medicine flow path section 38 is arranged at a position not overlapping the axis of the section 32.

Further, the other end of the insertion portion 32 in which the opening end 39 of the drug flow passage portion 38 is provided is provided with a recess 41 into which the mouth portion 34 of the storage container 31 is inserted. The recess 41 is formed such that its depth direction is along the longitudinal direction of the insertion portion 32. A female screw portion 42 is formed on the inner peripheral surface of the recess 41, and is configured to be screwed with a male screw portion 36 provided on the outer surface of the mouth portion 34 of the storage container 31. The open end portion 39 of the drug channel portion 38 is arranged so as to be exposed in the recess 41 as a tubular shape at the center position of the bottom surface of the recess 41.

Further, as described above, the open end portion 39 of the medicine flow passage portion 38 is configured to include the sharp projection portion 40. The form of the projection portion 40 is as follows. Considering the easiness of guiding the liquid medicine, as shown in the enlarged cross-sectional view of the main part of FIG. 5, a bamboo spear shape configured by obliquely molding the tip of the cylindrical protrusion 40 exposed in the recess 41 is formed. Preferably. The bamboo spear-shaped protrusion 40 (opening end 39) is configured such that its sharpened direction is along the longitudinal direction of the insertion portion 32 (the depth direction of the recess 41). The shape of the protrusion 40 is not limited to the bamboo spear shape, and may be a jagged protrusion provided on the tubular opening end 39.

As described above, since the opening end 39 of the drug flow path portion 38 is provided with the sharp protrusion 40, the mouth portion 34 of the storage container 31 is placed in the recess 41 formed on the other end side 32b of the insertion portion 32. Only by the operation of pushing and setting, the opening end portion 39 of the medicine flow path portion 38 is inserted into the lid portion 35 (top seal or the like) (the opening end portion 39 pierces the lid portion 35), and the storage portion 33 is formed. It becomes possible to communicate with the medicine flow path portion 38. Further, with such a configuration, the user does not need to peel off the lid portion 35 provided on the mouth portion 34 of the storage container 31 with fingers, and further, immediately before the user actually uses the drug injection device 200, Since it is possible to maintain the sealed state of the storage container 31 in which the fluid medicine is stored, it is possible to use the medicine injection device 200 in a hygienically preferable state.

Further, as described above, the concave portion 41 into which the mouth portion 34 of the storage container 31 is inserted is formed on the other end portion of the insertion portion 32, and the female screw portion 42 is formed on the inner peripheral surface of the concave portion 41. It is configured to be screwed with a male screw portion 36 provided on the outer surface of the mouth portion 34 of the storage container 31. With this configuration, the user applies the mouth portion 34 of the storage container 31 to the opening edge of the recess 41 formed at the other end of the insertion portion 32, and then rotates the storage container 31 to rotate the mouth portion 34. And the concave portion 41 are screwed together, the mouth portion 34 is pushed into the concave portion 41, and the lid portion 35 provided in the mouth portion 34 is pierced by the sharp open end portion of the medicine flow passage portion 38, and the storage container 31 and the insertion portion 32 are connected for communication. As described above, the communication connection between the storage container 31 and the insertion portion 32 is performed by screwing the recess 41 and the mouth portion 34, so that the connection state between the storage container 31 and the insertion portion 32 can be reliably maintained. become.

Further, the storage container 31 and the insertion portion 32 are connected to each other by screwing the concave portion 41 and the mouth portion 34, so that a sharp opening end portion 39 of the medicine flow passage portion 38 with respect to the lid portion 35 such as a ceiling seal is formed. Since it is possible to gently advance the insertion of the opening end 39, the lid portion (top seal portion) that is broken by the insertion of the opening end portion 39 is not divided from the lid portion that is adhered to the periphery of the mouth portion 34, It can be brought into a state of being in close contact with the peripheral surface of the opening end portion 39 that has entered the storage portion 33 and hanging down. As a result, due to the insertion of the opening end 39, a part of the lid 35 is separated and dropped into the storage portion 33, enters the opening end 39 of the medicine flow passage 38, and closes the medicine passage 38. It is possible to prevent blocking.

Further, since the opening edge of the lid portion 35, which is broken by the insertion of the opening end portion 39 of the medicine flow path portion 38, can be brought into a state of hanging down in close contact with the peripheral surface of the opening end portion 39 as described above, this hanging down is caused. The lid portion serves as a kind of valve body, and the liquid medicine in the storage portion 33 passes through the gap between the opening end portion 39 of the medicine flow passage portion 38 and the opening edge of the lid portion 35 to form the insertion portion. It can be effectively prevented from flowing into the concave portion 41 formed at the other end portion of 32.

In addition, as described above, the insertion portion 32 includes a plurality of medicine ejection holes 43 that communicate the medicine flow passage portion 38 and the outside. That is, the side surface portion of the insertion portion 32 is configured to include the plurality of medicine ejection holes 43 communicating with the medicine flow passage portion 38. By providing the drug ejection hole 43 as described above, the liquid container is gripped by the storage container 31 to compress the storage part 33, so that the liquid drug is provided with the mouth part 34 of the storage container 31, the drug flow path part 38, and the drug ejection hole 43. Will be guided to the outside of the insertion portion 32 via. The range in which the drug ejection holes 43 are arranged is preferably set in a region from the distal end portion to the central portion of the insertion portion 32 when viewed in the longitudinal direction of the insertion portion 32. More specifically, for example, when the present drug injection device 200 is configured for cleaning the inside of the vagina, the dimension from the distal end portion along the longitudinal direction of the insertion portion 32 is in the range of about 30 mm to 60 mm. It is preferable to form a plurality of medicine ejection holes 43 in the areas up to.

The drug ejection holes 43 are arranged at predetermined intervals along the longitudinal direction of the insertion portion 32. In this way, by providing a plurality of drug ejection holes 43 on the side surface of the insertion portion 32, it becomes possible to rapidly apply the drug to a wide range inside the body cavity such as the vagina and anus. In addition, when the injection of the liquid medicine into the body is completed and the insertion portion 32 is extracted from the body, the surface of the insertion portion 32 that is extracted allows the liquid medicine in the body to be spread and spread. The drug can be rapidly applied to a wider area inside the body cavity such as the anus and anus. Further, since the surface of the insertion portion 32 to be extracted is in a wet state due to the adherence of the liquid medicine, it is possible to alleviate the pain given to the user when the insertion portion 32 is extracted from the body.

In addition, in the present embodiment, the plurality of drug ejection holes 43 are arranged at predetermined intervals on the first virtual line along the longitudinal direction of the insertion section 32, which is assumed on the surface of the insertion section 32. Unlike the first ejection hole group 44 including the medicine ejection holes 43 and the first imaginary line, a predetermined interval is provided on the second imaginary line along the longitudinal direction of the insertion portion 32, which is assumed on the surface of the insertion portion 32. It is configured to include a second ejection hole group 45 including a plurality of medicine ejection holes 43 arranged. By configuring such a positional relationship of the drug ejection holes 43, it becomes possible to apply the drug effectively and quickly to a wide range inside the body cavity such as the vagina and anus.

Further, it is preferable that each medicine ejection hole 43 in the first ejection hole group 44 and each medicine ejection hole 43 in the second ejection hole group 45 are formed on both sides sandwiching the medicine flow path portion 38. By adopting such a configuration, it becomes possible to apply the drug to the inside of a body cavity such as the vagina or anus in a wider range.

Further, as shown in FIG. 3, the drug ejection holes 43 in the first ejection hole group 44 and the drug ejection holes 43 in the second ejection hole group 45 are staggered along the longitudinal direction of the insertion portion 32. It is preferable that they are arranged in a relationship. Such a configuration also contributes to application of the drug in a wider area inside the body cavity such as the vagina and anus.

Further, in the present embodiment, the insertion portion 32 is formed so that the cross-sectional shape perpendicular to the longitudinal direction thereof is elliptical, but in the case of such a configuration, at least the first ejection hole group 44. It is preferable that each of the medicine ejection holes 43 is formed on a side surface portion in the minor axis direction of the insertion portion 32 having an elliptical cross section. In this way, when the medicine ejection hole 43 is formed on the side surface portion in the minor axis direction of the insertion portion 32, the length of the medicine ejection hole 43 can be shortened and the fluid medicine passing through the inside is clogged. Can be effectively prevented. Further, it is possible to reduce the amount of the fluid medicine remaining inside the medicine ejection hole 43 and not ejected to the outside.

In addition, in the present embodiment, the drug discharge holes 43 are configured so that the hole diameters thereof are the same size. However, for example, as the liquid drug flowing through the drug flow path portion 38 flows downward, The discharge hole 43 may be configured such that the hole diameter gradually increases. When such a configuration is adopted, in the present embodiment, the liquid medicine flows down the medicine flow passage portion 38 from the other end side 32b of the insertion portion 32 toward the tip end side 32a, and each medicine ejection hole is formed. Since the composition is discharged from 43, the diameters of the medicine ejection holes 43a, the medicine ejection holes 43b, the medicine ejection holes 43c, and the medicine ejection holes 43d are gradually increased in this order. When all the drug ejection holes 43 have the same diameter, there is a possibility that the liquid medicine may be difficult to be ejected from the drug ejection holes 43d arranged on the downstream side of the drug flow path portion 38 due to the influence of the pressure loss. As described above, the diameters of the respective drug ejection holes 43 are increased stepwise as the flowable drug flowing through the drug flow path portion 38 is directed downward from the respective drug ejection holes 43. It is possible to maintain the amount of the liquid medicine discharged evenly, and it is possible to apply the liquid medicine evenly over a wide range inside the body cavity such as the vagina and anus.

Further, in the present embodiment, the medicine ejection hole 43 is configured not to be provided in the distal end portion of the insertion portion 32, but the invention is not limited to such a configuration, and the medicine ejection hole 43 is disposed in the distal end portion of the insertion portion 32. It may be configured to be provided in.

The bulging portion 37 is provided at the other end of the insertion portion 32 as described above, and the bulging portion 37 is formed in the entire area around the other end of the insertion portion 32. The form of the bulging portion 37 is not particularly limited, but in the present embodiment, as shown in FIG. 6 which is a plan view seen from the direction of arrow C in FIG. 3, with respect to the longitudinal direction of the insertion portion 32. It is preferable that the cross-sectional shape in the vertical direction is elliptical. By providing such a bulging portion 37, when the user inserts the insertion portion 32 into a body cavity (body) such as the vagina or anus, the bulging portion 37 exerts a function as a stopper and stores It is possible to effectively prevent the container 31 from being inserted into the body. Further, by providing the bulging portion 37, it becomes easier to rotate the storage container 31 or the insertion portion 32 when the storage container 31 is screwed into the other end side 32b of the insertion portion 32, and the operability for the user is improved. Can be made.

Further, by forming the bulging portion 37 so that the cross-sectional shape in the direction perpendicular to the longitudinal direction of the insertion portion 32 is an ellipse, the function as a stopper can be effectively exerted and the user The psychological stress given to can be made as small as possible. That is, in the case of an elliptical shape, since the short axis exists, the bulging portion 37 is smaller than the bulging portion 37 in which the cross-sectional shape in the direction perpendicular to the longitudinal direction of the insertion portion 32 is circular. It is easy to do so, and the user can feel a sense of security when inserting the insertion portion 32.

In addition, it is preferable that the bulging portion 37 and the insertion portion 32 are connected by a smooth curved surface. By adopting such a configuration, the user can relieve the pain when the insertion portion 32 is inserted into the body cavity (body) such as the vagina or anus and the bulging portion 37 abuts the body cavity entrance. In addition, it is possible to give the user a psychological sense of security that pain is not caused or pain is relieved.

Moreover, it is preferable that the maximum diameter of the bulging portion 37 is configured to be larger than the maximum width of the storage container 31 connected to the other end of the insertion portion 32. By adopting such a configuration, it is possible to more effectively prevent the storage container 31 from being accidentally inserted into the body.

Further, in the present embodiment, as shown in FIGS. 7A and 7B, a flexible elastomer cover 46 may be provided at the tip of the insertion portion 32. Note that FIG. 7A is a side view of the insertion portion 32, and FIG. 7B is a sectional view thereof. The cover 46 is a member that fits the distal end portion of the insertion portion 32, and has a bowl-like shape having a storage space for storing the distal end portion of the insertion portion 32 inside. When the elastomer-made cover 46, which is such a flexible and flexible material, is provided at the distal end of the insertion portion 32, when the insertion portion 32 is inserted into a body cavity (body) such as the vagina or anus. Moreover, it is possible to give the user a psychological sense of security that pain is not caused or pain is relieved.

A method of attaching the covering body 46 to the distal end portion of the insertion portion 32 is not particularly limited. For example, as shown in FIG. 7B, a stepped portion 47 is formed on a part of the distal end surface of the insertion portion 32, and The stepped portion 47 is attached so that the inner peripheral surface of the storage space of the covering body 46 abuts. Further, the distal end portion of the insertion portion 32 and the covering body 46 may be configured to be fixed to each other with an adhesive, or the step portion 47 and the opening edge of the covering body 46 around the storage space are fitted to each other. Fitting structures that fit together may be provided and fixed to each other. Alternatively, the covering body 46 may be fitted on the distal end portion of the insertion portion 32 by using an injection molding method.

Further, it is preferable that the cover 46 is configured to be flush with the surface of the insertion section 32 so that the user does not feel pain when the insertion section 32 is inserted into the body.

Further, as shown in FIGS. 8A, 8B, and 8C, the covering body 46 extends from the tip end side 32a of the insertion portion 32 toward the base end side (the other end side 32b) and is inserted. You may comprise so that the side surface coating part 48 which covers a part of side surface near the front-end|tip part of the part 32 may be provided. By providing such a side surface covering portion 48, it is possible to obtain an impression that a wide range on the distal end side of the insertion portion 32 is covered with the elastomer covering body 46 which is a flexible and soft material. It can be given to the user, and when inserting the insertion portion 32 into a body cavity (body) such as the vagina or anus, the psychological stress that the user feels "may be accompanied by pain" is effectively exerted. It becomes possible to ease. When such a side surface covering portion 48 is provided, the side surface covering portion 48 is configured so as not to overlap the medicine ejection hole 43 formed on the side surface of the insertion portion 32. Here, Fig.8 (a) is a side view of the insertion part 32, and FIG.8(b) is a side view seen from the arrow D direction of Fig.8 (a). Further, FIG. 8C is an explanatory diagram showing a state in which the cover 46 is removed from the insertion portion 32.

In addition, the side surface covering portion 48 extending from the tip end side 32a of the insertion portion 32 toward the base end portion side (the other end portion side 32b) has both sides sandwiching the axis of the insertion portion 32, as shown in each drawing of FIG. It is preferable to provide each of them. With such a configuration, it becomes possible to more effectively relieve the above-mentioned psychological stress felt by the user.

In particular, when the covering body 46 is attached to the insertion portion 32 whose cross-sectional shape perpendicular to the longitudinal direction is elliptical as in the present embodiment, the side surface covering portion 48 is inserted with the elliptical cross section. It is preferably formed so as to cover the side surface portion of the portion 32 in the long axis direction. By adopting such a configuration, the impression that the tip side surface on the wide side is covered over a wide range by the elastomer material which is a flexible and flexible material Since it can be strongly given to the user, when inserting the insertion portion 32 into a body cavity (body) such as the vagina or anus, the psychological stress that the user feels “may be accompanied by pain” is further effective. It becomes possible to relax.

200 drug injection device 31 storage container 32 insertion part 33 storage part 34 mouth part 35 lid part 36 male screw part 37 formed on the outer peripheral surface of the mouth part 37 bulging part 38 drug channel part 39 open end part of drug channel part 40 Projection 41 Recess 42 Female Threaded Part 43 Formed on Inner Surface of Recess 43 Drug Discharge Holes 44 First Discharge Hole Group 45 Second Discharge Hole Group 46 Cover 47 Step Step 48 Side Cover

Claims (5)

A drug injection device for injecting a fluid drug into the body,
A long insertion part that is inserted into the body from one end side,
Having a mouth portion connectable to the other end portion of the insertion portion, comprising a storage container for storing a fluid drug,
The insertion portion is formed inside, and is provided with a medicine flow passage portion through which the fluid medicine extruded from the storage container is guided, and a medicine ejection hole that communicates the medicine passage portion and the outside,
The drug channel portion has an opening end portion that opens at the other end portion of the insertion portion,
The open end of the drug flow path part is provided with at least one or more sharp protrusions, and is configured to be insertable into a lid part provided at the mouth part of the storage container. Injection device. On the outer surface of the mouth of the storage container, a male screw portion is formed,
The other end of the insertion portion is provided with a recess in which a female screw portion to which the male screw portion of the mouth portion is screwed is formed,
The drug injection device according to claim 1, wherein an open end of the drug flow path part is arranged in the recess. The drug injection device according to claim 1 or 2, wherein an opening end of the drug channel portion is formed into a bamboo spear shape. 4. The other end of the insertion portion is provided with a bulge portion that bulges in a direction perpendicular to the connection direction of the storage container to the insertion portion. The drug injection device as described in 1. The drug injection device according to claim 4, wherein the bulging portion has an elliptical cross-sectional shape in a direction perpendicular to a connecting direction of the storage container to the insertion portion.

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