JP7275425B2 - drug injection device - Google Patents

Description

TECHNICAL FIELD 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 liquid medicines 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 washing solution for washing the female genitals, administering a contraceptive solution for contraception, and administering a drug solution for treating hemorrhoids and venereal diseases. Over.

Since the inner parts of the human body such as the genitalia and anus are exposed to mucous membranes, they are very sensitive to external stimuli, and the mucous membranes are easily damaged or contaminated. Therefore, great care must be taken to administer the various flowable drugs as described above.

Conventionally, in order to alleviate the inconvenience of directly administering a fluid medicine manually, a medicine injection device capable of injecting a fluid medicine 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 ejection hole formed at its tip is provided, and a push rod (piston) provided in the cylinder is inserted into the cylinder. It employs a form that is pushed toward the tip, and the liquid medicine is made to flow out from the medicine discharge hole provided at the tip of the cylinder.

JP 2014-004309 A

As described above, conventionally known drug injection devices are used by being inserted into a body cavity (inside the body) such as the vagina or anus. There is a concern that it will give psychological stress that "it may be painful."

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drug injection device that can alleviate the psychological stress felt by the user during use.

The above-described object of the present invention is a drug injection device for injecting a fluid drug into the body, comprising: a storage section in which the liquid drug is stored; an elongated insertion section to be inserted into the body; a drug flow path formed inside the storage section to guide the drug pushed out from the storage section, the drug flow path formed along the longitudinal direction of the insertion section, and the elongated length of the drug flow path; The insertion portion has a drug ejection hole that communicates the drug flow path portion with the outside, and a flexible elastomer covering is provided at the distal end of the insertion portion, The drug injection device is characterized in that the cover and the insertion portion are configured to be flush with each other .

In this drug injection device, the covering includes a side surface covering portion that extends from the distal end side of the insertion portion toward the other end portion side and covers a part of the side surface of the insertion portion near the distal end portion. may be configured.

Further, the cover may be configured to include the side surface cover portions on both sides of the insertion portion with respect to the axis thereof.

Further, the insertion portion has an elliptical cross-sectional shape perpendicular to the longitudinal direction thereof, and the side surface covering portion covers the side surface of the insertion portion having the elliptical cross-section in the longitudinal direction. It may be configured to be formed to cover.

According to the present invention, it is possible to provide a drug injection device that can alleviate the psychological stress that a user feels when using it.

1 is a schematic perspective view of a pharmaceutical injection device according to the present invention; FIG. 1 is a schematic structural cross-sectional view showing a cross-section along a longitudinal axis of a drug injection device according to the present invention; FIG. FIG. 3 is a schematic configuration cross-sectional view showing a BB cross section of FIG. 2; (a) is a cross-sectional view of a storage container included in the drug injection device according to the present invention, and (b) is a cross-sectional view of an insertion portion. Fig. 2 is an enlarged cross-sectional view of a main part for explaining an opening end of a drug flow channel provided in the drug injection device according to the present invention; FIG. 4 is a plan view of the drug injection device viewed from the direction of arrow C in FIG. 3; FIG. 4 is an explanatory diagram for explaining a modification of the drug injection device according to the present invention; FIG. 8 is an explanatory diagram for explaining a further modified example of the drug injection device according to FIG. 7;

A pharmaceutical 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 pharmaceutical injection device 200 according to the present invention, and FIG. 2 is a schematic configuration sectional view showing a cross section along the longitudinal axis of the pharmaceutical injection device 200. As shown in FIG. FIG. 3 is a schematic sectional view showing the BB section of FIG. Each figure is partially enlarged/reduced to facilitate understanding of the configuration.

A drug injection device 200 according to the present invention is, for example, a device for injecting a fluid drug into a body cavity (body) such as a vagina or an anus. A wide variety of liquid medicines can be used, and examples thereof include detergents, contraceptives, anesthetics, enemas, antipyretic agents, and lubricants. Moreover, various forms such as lotion-like, gel-like, and jelly-like forms can be adopted as the form of the liquid drug.

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

The storage container 31 is a flexible container, and includes a storage part 33 in which a fluid drug is stored. In addition, the storage container 31 has an opening 34 through which the liquid medicine flows out at the tip. 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 . In addition, as shown in the cross-sectional view of FIG. 4A, a ceiling seal 35 for closing the mouth portion 34 is adhered to the mouth portion 34, and when the insertion portion 32 is not connected, the internal It is configured so that the fluid medicine does not flow out to the outside through the mouth portion 34 . A male screw portion 36 is formed on the outer peripheral surface of the mouth portion 34 . The material constituting the storage container 31 should be such that the storage container 31 itself is flexible and can be compressed and deformed by the user's grip to allow the liquid medicine inside to flow out through the mouth portion 34 . The material is not particularly limited. As the storage container 31, for example, a blow-molded tube or an extrusion-molded tube using a plastic resin raw material can be suitably used.

The insertion portion 32 is inserted into a body cavity (inside the body) such as the vagina or the anus of a human body from its distal end 32a. As shown in the cross-sectional views of FIGS. It is formed in a long shape extending along the insertion direction of the. The length of the insertion portion 32 is preferably set in the range of 50 mm to 100 mm, for example, when the drug injection device 200 is configured for washing the inside of the vagina. A bulging portion 37 is formed in the . The distal end 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 with a curved surface as a whole, and is formed so as to have an elliptical cross section. 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.

The insertion portion 32 also includes a drug channel portion 38 through which the drug pushed out from the storage portion 33 is guided, and a drug ejection hole 43 communicating the drug channel portion 38 with the outside. The drug channel portion 38 is formed inside the insertion portion 32 . The drug channel portion 38 is formed to extend along the longitudinal direction of the insertion portion 32 and has an open end portion 39 that opens at the other end portion of the insertion portion 32 . In addition, the end of the drug channel portion 38 opposite to the opening end 39 (the end of the distal end portion side 32a of the insertion portion 32) extends to the vicinity of the distal end portion inside the insertion portion 32. However, the distal end portion of the insertion portion 32 is configured so as not to open. The opening end 39 of the drug channel portion 38 has at least one or more sharp protrusions 40 and is configured to be able to pierce the top seal 35 provided at the mouth portion 34 of the storage container 31 . Here, in the present embodiment, the drug channel portion 38 is formed so that the axis of the drug channel portion 38 overlaps the axis of the insertion portion 32. The drug channel portion 38 may be formed so that the axis of the drug channel portion 38 is arranged at a position that does not overlap the axis of the portion 32 .

The other end of the insertion portion 32 where the opening end 39 of the drug channel portion 38 is provided has 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 threaded portion 42 is formed on the inner peripheral surface of the recessed portion 41 , and is configured to be screwable with a male threaded portion 36 provided on the outer surface of the mouth portion 34 of the storage container 31 . The opening end 39 of the drug channel portion 38 is arranged so as to be exposed as a cylindrical shape inside the recess 41 at the center position of the bottom surface of the recess 41 .

Further, the opening end portion 39 of the drug channel portion 38 is configured to have a sharp protrusion 40 as described above. Considering the ease of guiding the flowable drug, as shown in the enlarged cross-sectional view of the essential part in FIG. preferably. The spear-shaped projecting portion 40 (open end portion 39) is configured such that the sharp direction thereof extends along the longitudinal direction of the insertion portion 32 (the depth direction of the concave portion 41). Moreover, the shape of the protrusion 40 is not limited to a bamboo spear shape, and may be configured as a jagged protrusion provided at the cylindrical opening end 39 .

As described above, the opening end portion 39 of the drug flow path portion 38 is provided with the sharp projection portion 40 so that the mouth portion 34 of the storage container 31 is inserted into the recess portion 41 formed on the other end side 32b of the insertion portion 32. Only by pushing in and setting, the opening end 39 of the drug channel portion 38 is inserted into the top seal 35 (the opening end 39 breaks through the top seal 35), and the storage portion 33 and the drug channel portion 38 are connected. It becomes possible to communicate with Moreover, with such a configuration, the user does not need to peel off the top seal 35 provided on the mouth portion 34 of the storage container 31 with his or her fingers. Since it is possible to maintain the closed state of the storage container 31 in which the fluid drug is stored, the drug injection device 200 can be used in a hygienic condition.

Further, as described above, the recess 41 into which the mouth 34 of the storage container 31 is inserted is formed at the other end of the insertion portion 32, and the internal thread portion 42 is formed on the inner peripheral surface of the recess 41. It is configured to be screwable with a male screw portion 36 provided on the outer surface of the mouth portion 34 of the storage container 31 . With such a configuration, the user can apply 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 rotate the storage container 31 to open the mouth portion 34. and the recessed portion 41 are screwed together, the mouth portion 34 is pushed into the recessed portion 41, and the top seal 35 provided in the mouth portion 34 is broken by the sharp open end portion of the drug flow path portion 38, and the storage container 31 and the insertion portion 32 are connected for communication. By connecting the storage container 31 and the insertion portion 32 by screwing the recess 41 and the mouth portion 34 in this way, the connection state between the storage container 31 and the insertion portion 32 can be reliably maintained. become.

Further, by connecting the storage container 31 and the insertion portion 32 by screwing the concave portion 41 and the mouth portion 34, the sharp opening end portion 39 of the drug channel portion 38 can be inserted into the top seal 35. Since it can be advanced gently, the top seal portion torn by the insertion of the opening end portion 39 is not separated from the top seal portion adhered around the mouth portion 34, and the opening enters the storage portion 33. It can be brought into a hanging state in close contact with the peripheral surface of the end portion 39 . As a result, a portion of the top seal 35 separates and drops into the storage portion 33 by the insertion of the open end portion 39, enters the open end portion 39 of the drug channel portion 38, and closes the drug channel portion 38. Blockage can be prevented.

In addition, since the opening edge of the top seal 35 torn by the insertion of the opening end portion 39 of the drug channel portion 38 can hang down in close contact with the peripheral surface of the opening end portion 39 as described above, this hanging down can be achieved. The top seal 35 part serves as a kind of valve body, and the fluid medicine in the storage part 33 passes through the gap between the opening end 39 of the medicine flow path part 38 and the opening edge of the top seal 35 and is inserted. It is possible to effectively prevent the liquid from flowing into the recess 41 formed at the other end of the portion 32 .

In addition, as described above, the insertion portion 32 includes a plurality of drug ejection holes 43 that communicate the drug flow path portion 38 and the outside. That is, the side surface portion of the insertion portion 32 is configured to have a plurality of drug ejection holes 43 communicating with the drug flow path portion 38 . By providing such a drug ejection hole 43 , by gripping the storage container 31 and compressing the storage portion 33 , the fluid drug is discharged from the mouth portion 34 of the storage container 31 , the drug flow path portion 38 , and the drug ejection hole 43 . It is guided to the outside of the insertion portion 32 via. In addition, it is preferable that the range in which the medicine ejection hole 43 is arranged is set to 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 drug injection device 200 is configured for washing the inside of the vagina, the dimension from the distal end 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 area up to .

Each drug discharge hole 43 is arranged at a predetermined interval along the longitudinal direction of the insertion portion 32 . Thus, by providing a plurality of drug discharge holes 43 on the side surface of the insertion portion 32, it is possible to quickly apply the drug to a wide area inside the body cavity such as the vagina and the anus. In addition, when the injection of the fluid medicine into the body is completed and the insertion part 32 is withdrawn from the body, the surface of the withdrawn insertion part 32 allows the fluid medicine in the body to be spread and spread, thereby allowing the fluid medicine to spread. It is possible to rapidly apply a drug to a wider area inside body cavities such as the anus and the anus. In addition, since the surface of the extracted insertion portion 32 is in a wet state due to the adherence of the fluid medicine, pain given to the user when the insertion portion 32 is extracted from the body can be alleviated.

Further, in the present embodiment, the plurality of medicine ejection holes 43 are arranged at predetermined intervals on a first imaginary line assumed on the surface of the insertion portion 32 along the longitudinal direction of the insertion portion 32 . Unlike the first imaginary line, the first ejection hole group 44 made up of the drug ejection holes 43 and the second imaginary line along the longitudinal direction of the insertion portion 32 assumed on the surface of the insertion portion 32 are spaced apart from each other by a predetermined interval. A second ejection hole group 45 composed of a plurality of arranged medicine ejection holes 43 is provided. By configuring the positional relationship of the drug ejection holes 43 in this manner, it is possible to effectively and quickly apply the drug to a wide range inside the body cavity such as the vagina and the anus.

Moreover, 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 preferably formed on both sides of the medicine flow path portion 38 . By adopting such a configuration, it becomes possible to apply the drug to the inside of body cavities such as the vagina and the anus over a wider range.

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

In the present embodiment, the insertion portion 32 is formed so that its cross-sectional shape perpendicular to the longitudinal direction is elliptical. It is preferable that each medicine ejection hole 43 in 3 is formed in a side surface portion in the minor axis direction of the insertion portion 32 having an elliptical cross section. In this way, when the drug ejection hole 43 is formed in the lateral side portion of the insertion portion 32 in the short axis direction, the length of the drug ejection hole 43 can be shortened, and the flowable drug passing through the inside can be prevented from being clogged. can be effectively prevented. Furthermore, it is possible to reduce the amount of fluid medicine that remains inside the medicine ejection hole 43 and is not ejected to the outside.

Further, in the present embodiment, the hole diameters of the respective medicine ejection holes 43 are configured to be the same size. The hole diameter of the discharge hole 43 may be configured to increase stepwise. When adopting such a configuration, in the present embodiment, the fluid medicine flows down the medicine flow path part 38 from the other end part side 32b of the insertion part 32 toward the tip part side 32a, and each medicine ejection hole 43, the hole diameters are gradually increased in the order of drug ejection hole 43a, drug ejection hole 43b, drug ejection hole 43c, and drug ejection hole 43d. If all the medicine ejection holes 43 are configured to have the same hole diameter, it may be difficult to eject fluid medicine from the medicine ejection holes 43d arranged on the downstream side of the medicine flow path part 38 due to the influence of pressure loss. As described above, the hole diameter of each medicine ejection hole 43 is increased stepwise in the downward flow direction of the fluid medicine flowing through the medicine flow path part 38 , so that each medicine ejection hole 43 It is possible to maintain a uniform amount of the fluid medicine to be ejected, and it is possible to evenly apply the fluid medicine over a wide range inside the body cavity such as the vagina and the anus.

In addition, in the present embodiment, the medicine ejection hole 43 is not provided at the distal end of the insertion section 32, but is not limited to such a configuration. may be configured to be provided in

The other end of the insertion portion 32 is provided with the bulging portion 37 as described above. The shape of the bulging portion 37 is not particularly limited, but in this embodiment, as shown in FIG. 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 (inside the body) such as the vagina or anus, the bulging portion 37 functions as a stopper, thereby causing retention. 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 to the other end portion side 32b of the insertion portion 32, thereby improving operability for the user. can be made

In addition, 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 elliptical, the function as a stopper can be effectively exhibited and the user can be It is possible to minimize the psychological stress given to the That is, in the case of an ellipse, since there is a short axis, the bulging portion 37 is smaller than the bulging portion 37 having a circular cross-sectional shape in the direction perpendicular to the longitudinal direction of the insertion portion 32. This makes it easy for the user to insert the insertion portion 32, and can evoke a sense of security when the user inserts the insertion portion 32.

Moreover, 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, it is possible to alleviate the pain caused when the user inserts the insertion portion 32 into a body cavity (inside the body) such as the vagina or anus and the bulging portion 37 abuts the entrance of the body cavity. In addition, it is possible to provide the user with a psychological sense of security that the pain is not accompanied or the pain is relieved.

Moreover, it is preferable that the maximum diameter of the bulging portion 37 is 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 erroneously inserted into the body.

In this embodiment, as shown in FIGS. 7A and 7B, the distal end portion of the insertion portion 32 may be provided with a flexible elastomer covering 46 . 7(a) is a side view of the insertion portion 32, and FIG. 7(b) is a sectional view thereof. The cover 46 is a member for fitting the distal end portion of the insertion portion 32, and has a bowl-like shape having a housing space inside for housing the distal end portion of the insertion portion 32. As shown in FIG. By providing the elastomer-made cover 46, which is a flexible and soft material, at the distal end of the insertion section 32, when the insertion section 32 is inserted into a body cavity (inside the body) such as the vagina or the anus. In addition, it is possible to give the user a psychological sense of security that the pain is not accompanied or the pain is alleviated.

The method of attaching the cover 46 to the distal end of the insertion section 32 is not particularly limited. For example, as shown in FIG. The cover 46 is mounted so that the inner peripheral surface of the storage space of the cover 46 is brought into contact with the stepped portion 47 . The distal end portion of the insertion portion 32 and the cover 46 may be fixed to each other with an adhesive, or the stepped portion 47 and the edge of the opening of the cover 46 around the storage space may be fitted to each other. A mating structure may be provided to secure them together. Alternatively, the tip of the insertion portion 32 may be covered with the cover 46 using an injection molding method.

Moreover, it is preferable that the cover 46 is 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.

8A, 8B, and 8C, the cover 46 extends from the distal end side 32a of the insertion section 32 toward the proximal end side (the other end side 32b), A side covering portion 48 covering a part of the side surface of the portion 32 in the vicinity of the tip portion may be provided. By providing such a side surface covering portion 48, the impression is that a wide range on the distal end portion side of the insertion portion 32 is covered with the elastomer covering 46, which is a flexible and soft material. It can be given to the user, and effectively relieves the psychological stress that the user feels when inserting the insertion part 32 into a body cavity (inside the body) such as the vagina or the anus. It is possible to relax. In addition, when such a side surface covering portion 48 is provided, it is configured so as not to overlap the medicine ejection hole 43 formed in the side surface of the insertion portion 32 . Here, FIG. 8(a) is a side view of the insertion portion 32, and FIG. 8(b) is a side view seen from the arrow D direction of FIG. 8(a). FIG. 8(c) is an explanatory diagram showing a state in which the cover 46 is removed from the insertion portion 32. As shown in FIG.

8, the side covering portion 48 extending from the distal end portion side 32a of the insertion portion 32 toward the proximal end portion side (the other end portion side 32b) is It is preferable to configure so as to be provided in each of the. With such a configuration, it is possible to more effectively alleviate the above-described psychological stress felt by the user.

In particular, when the cover 46 is attached to the insertion portion 32 having an elliptical cross-sectional shape perpendicular to the longitudinal direction as in this embodiment, the side cover 48 has an elliptical cross-section. It is preferably formed so as to cover the longitudinal side portion of the portion 32 . By adopting such a configuration, the user is given the impression that the wide tip side portion is covered over a wide range with an elastomer material that is flexible and soft. Therefore, when inserting the insertion portion 32 into a body cavity (inside the body) such as the vagina or anus, the psychological stress that the user feels that "it may be painful" is more effectively reduced. can be effectively relaxed.

In addition, as described above, regarding the drug injection device 200 according to the present invention, the configuration in which the storage section 33 and the drug flow path section 38 are clearly separated has been described. 1 (Japanese Patent Application Laid-Open No. 2014-004309), a configuration in which the reservoir 33 and the drug channel portion 38 are also used, that is, the drug channel portion stores the fluid drug. It includes a configuration that exhibits a function as a storage section (corresponding to the accommodation space S in Patent Document 1). Specifically, for example, the drug channel portion 38 provided inside the insertion portion 1 is configured as a storage portion in which the fluid drug is stored, and a piston is inserted into the drug channel portion 38. , in which the fluid medicine in the medicine channel portion 38 is ejected from the medicine ejection hole 13 to the outside. When the drug injection device 200 is configured in this manner, the storage part 33 and the drug channel part 38 are not clearly distinguished, and the storage part 33 and the drug channel part 38 are used in common.

200 Drug injection device 31 Storage container 32 Insertion portion 33 Storage portion 34 Mouth portion 35 Top seal 36 Male screw portion 37 formed on the outer peripheral surface of the mouth portion Swelling portion 38 Drug channel portion 39 Opening end of drug channel portion 40 projection 41 recess 42 female screw 43 formed on the inner peripheral surface of the recess medicine ejection hole 44 first ejection hole group 45 second ejection hole group 46 cover 47 step 48 side cover

Claims (4)

A drug injection device for injecting a fluid drug into the body,
a storage part in which the fluid medicine is stored;
an elongated insertion portion to be inserted into the body;
a drug channel section formed inside the insertion section to guide the drug pushed out from the storage section,
The drug channel portion is formed along the longitudinal direction of the insertion portion,
The elongated insertion portion has a drug ejection hole that communicates the drug flow path portion with the outside,
A flexible elastomer covering is provided at the distal end of the insertion portion ,
A pharmaceutical injection device , wherein the cover and the insertion portion are flush with each other . The cover includes a side covering part that extends from the distal end side of the insertion section toward the other end side and covers a part of the side surface near the distal end part of the insertion section. Item 1. The drug injection device according to item 1. 3. The pharmaceutical injection device according to claim 2, wherein the covering body has the side covering portions on both sides of the axis of the insertion portion. The insertion portion has an elliptical cross-sectional shape perpendicular to its longitudinal direction,
4. The drug injection device according to claim 2, wherein the side surface covering portion is formed to cover a longitudinal side surface portion of the insertion portion having the elliptical cross section.

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