JP2020074915A - Medicinal solution administration device - Google Patents

Abstract

To provide a medicinal solution administration device capable of suppressing deterioration of sealability of a seal member in a state that the seal member disposed in an administration port part is penetrated with a penetration member.SOLUTION: A medicinal solution administration device 10 includes a first housing 200 equipped with a medicinal solution storage part 221 for storing a medicinal solution and a casing 210 in which the medicinal solution storage part is disposed, and a second housing 300 equipped with a liquid sending part 440 where a first flow channel 440a for sending the medicinal solution into a living body is formed, and an administration port part 400 where a seal member 460 is disposed, which is configured so as to be connected to and separated from the first housing. The first housing includes a penetration member 225 for communicating the medicinal solution storage part and the first flow channel of the liquid sending part with each other by penetrating the seal member accompanying the connection of the first housing and the second housing. The seal member includes a first convex part 461 that protrudes in a direction opposite to a direction that the penetration member penetrates the seal member.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a drug solution administration device.

  BACKGROUND ART Conventionally, as a device that administers a drug solution such as insulin, a portable drug solution administration device that continuously or intermittently administers a drug solution attached to the skin of a patient or subject to be administered has been known. (For example, see Patent Document 1).

  The drug solution administration device includes a first housing having a drug solution storage unit that stores a drug solution and a solution sending mechanism such as a plunger that sends the drug solution from the drug solution storage unit; and a solution sending unit that sends the drug solution into the body of the user ( Some include a first housing and a second housing configured to be connectable and separable, the injection housing including a cannula) and a predetermined sealing member.

  When starting the administration of the drug solution using the drug solution administration device, the user connects the first housing and the second housing and connects the channel of the drug solution storage unit and the flow path of the liquid delivery unit. The flow paths of the drug solution storage unit and the liquid sending unit are communicated with each other via a penetrating member (for example, a needle tube) configured to be able to penetrate the seal member arranged in the administration port unit.

Tokuyo 2010-531197

  When the user penetrates the seal member through the penetrating member, if the penetrating member obliquely penetrates the seal member, the seal member is deformed into an inadvertent shape, and a gap is formed between the seal member and the penetrating member. It When such a gap is formed, the sealing property of the seal member is deteriorated, and the chemical liquid may leak out.

  The present invention has been made in view of the above problems, and in a state in which the penetrating member is penetrated through the seal member arranged in the administration port portion, a chemical liquid administration device capable of suppressing deterioration of the sealability of the seal member. The purpose is to provide.

  A drug solution administration device according to the present invention includes a first housing including a drug solution storage unit capable of storing a drug solution and a housing in which the drug solution storage unit is disposed, and a flow path for delivering the drug solution into a living body. And a second housing configured to be connectable and separable from the first housing, the first housing including the first housing, The penetrating member is formed on the sealing member, and includes a penetrating member that communicates with the flow path of the liquid solution storage unit and the liquid sending unit by penetrating the sealing member in connection with the second housing. A first convex portion protruding toward a side opposite to a direction of penetrating the seal member, and a second convex portion formed on the housing and protruding in a direction in which the penetrating member penetrates the seal member. Of at least one of

  According to the drug solution administration device of the present invention, when the penetrating member is penetrated through the seal member, at least one of the first convex portion formed on the seal member and the second convex portion formed on the housing causes the penetrating member to The penetrating direction that penetrates the seal member can be guided in an appropriate direction. Therefore, in the drug solution administration device, it is possible to prevent the sealability of the seal member arranged in the dosing port part of the second housing from being deteriorated in a state where the drug solution storage part and the flow path of the liquid delivery part are in communication with each other.

It is an exploded perspective view of the medical fluid administration device concerning a 1st embodiment. FIG. 6 is a perspective view showing a positional relationship between a cavity formed in the housing of the first housing and an administration port portion arranged in the second housing. It is an exploded perspective view of an administration port part. FIG. 6 is a cross-sectional view showing a state before the penetrating member penetrates the seal member and a state after the penetrating member penetrates the seal member in the drug solution administration device according to the first embodiment. FIG. 9 is a cross-sectional view showing a state before the penetrating member is penetrated through the seal member and a state after the penetrating member is penetrated through the seal member in the drug solution administration device according to the second embodiment. FIG. 11 is a cross-sectional view showing a state before the penetrating member is penetrated through the seal member and a state after the penetrating member is penetrated through the seal member in the drug solution administration device according to the third embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The size and ratio of each member in the drawings are exaggerated for convenience of description, and may be different from the actual size and ratio.

(First embodiment)
With reference to FIGS. 1 to 4, the drug solution administration device 10 according to the first embodiment will be described. FIG. 1 is an exploded perspective view of the drug solution administration device 10, and FIG. 2 is a diagram showing a positional relationship between a cavity 213 formed in a housing 210 of the first housing 200 and an administration port portion 400 arranged in the second housing 300. 3, FIG. 3 is an exploded perspective view of the administration port portion 400, and FIGS. 4A and 4B are enlarged cross-sectional views showing a state before and after the penetrating member 225 is passed through the seal member 460.

  The drug solution administration device 10 is configured as a portable insulin administration device that delivers insulin as a drug solution into the body of a diabetic patient who is a user. The drug solution is not limited to insulin and may be another drug solution.

  The drug solution administration device 10 will be outlined with reference to FIGS. 1, 2, 4A, and 4B. A drug solution storage unit 221 capable of storing a drug solution and a housing in which the drug solution storage unit 221 is disposed. A first housing 200 including 210, a liquid feeding unit 440 in which a first flow path (corresponding to a “flow path”) 440a for sending a drug solution into a living body is formed, and a predetermined seal member 460 are arranged. The second housing 300 includes the administration port portion 400 and is configured to be connectable and separable from the first housing 200, and the pump main body 100 in which the drive mechanism 120 is disposed.

<First housing>
As shown in FIG. 1, the first housing 200 has a liquid delivery mechanism 220 arranged in a housing 210. The liquid feeding mechanism 220 includes a chemical liquid storage unit 221, a pusher 222 that feeds the chemical liquid from the chemical liquid storage unit 221, and a gear 223 that generates a driving force for moving the pusher 222.

  The chemical liquid storage part 221 has a storage part main body 221a having an internal space in which the chemical liquid is stored, and a first port part 221b and a second port part 221c which communicate with the internal space of the storage part main body 221a.

  The first port portion 221b is configured to be connectable to a filling device (not shown) that fills the internal space of the storage portion main body 221a with the chemical liquid. When using the drug solution administration device 10, the user fills the internal space of the storage part main body 221a with the drug solution using a filling tool. The second port portion 221c communicates with the second flow path 225a of the penetrating member 225 via a predetermined liquid supply pipe (not shown) (see FIG. 4A).

  The gear 223 is configured to be able to mesh with the gear group 123 included in the pump body 100 shown in FIG. The gear 223 advances the pusher 222 connected to the gear 223 when the gear group 123 rotates and the rotational force is transmitted. The pusher 222 moves the internal space of the storage unit main body 221a to feed the chemical liquid to the penetrating member 225 via the second port portion 221c and the liquid feeding pipe. When the pusher 222 moves forward in the state where the second flow path 225a of the penetrating member 225 and the first flow path 440a of the liquid sending section 440 are in communication with each other, the chemical liquid administration device 10 passes through the first flow path 440a of the liquid sending section 440. To deliver the drug solution into the patient's body.

  As shown in FIGS. 1 and 2, a liquid delivery mechanism 220 is arranged in the housing 210. The housing 210 has a concave cavity 213 that can accommodate the administration port portion 400 included in the second housing 300 when the first housing 200 is connected to the second housing 300.

  As shown in FIG. 2, the cavity 213 is formed at one end of the housing 210 in the longitudinal direction. The cavity 213 is formed by cutting out a part of the bottom surface (the surface on the side where the second housing 300 is arranged) of the housing 210. A cylindrical enclosure portion 214 is formed on a surface 213a of the housing 210 which faces the cavity 213.

  The first housing 200 penetrates the seal member 460 in accordance with the connection between the first housing 200 and the second housing 300 (see FIGS. 4A and 4B), and thereby the chemical liquid storage section 221 is formed. The penetrating member 225 that communicates with the first flow path 440a of the liquid sending unit 440 is provided.

  As shown in FIG. 2, the tip portion 226 of the penetrating member 225 is housed in the enclosure portion 214. The penetrating member 225 is configured by a needle tube that extends in a substantially straight line and has a second flow path (lumen) 225a formed therein. The distal end portion 226 of the penetrating member 225 has a sharp shape capable of piercing the sealing member 460 of the administration port portion 400. The base end portion (not shown) of the penetrating member 225 is connected to the second port portion 221c of the chemical liquid storage portion 221 via the liquid supply pipe.

  The housing 210 of the first housing 200 can be formed of, for example, a resin material such as polypropylene, polyethylene terephthalate, polymethyl methacrylate, polycarbonate, or an ultraviolet curable resin, glass, or ceramics.

  The penetrating member 225 can be formed of a metal needle tube, and for example, stainless steel, aluminum, aluminum alloy, titanium, titanium alloy, or the like can be used.

<Second housing>
As shown in FIG. 1, the second housing 300 has a case 310 and an administration port section 400 arranged in the case 310.

  A fixing portion 311 that fixes the administration port portion 400 is provided on the upper surface (the surface on the side where the first housing 200 is arranged) of the case 310. The administration port section 400 can be fixed to the fixing section 311 by fitting or the like.

  An adhesive portion (not shown) for fixing the drug solution administration device 10 to the patient can be provided on the bottom surface of the case 310 (the surface that is arranged facing the body surface of the patient). The adhesive part may be provided with a release paper or the like that covers the adhesive part before use.

  As shown in FIG. 3, the administration port section 400 has a seal cap 410, a rubber stopper 420, a fixing pin 430, a liquid feeding section 440, a housing 450, and a seal member 460.

  The seal cap 410 protects the upper port 451 by covering the upper port 451 of the housing 450. The rubber stopper 420 seals the upper port 451 of the housing 450 after removing the introduction needle (not shown) that penetrates the rubber stopper 420.

  The introduction needle is used when introducing the liquid delivery unit 440 into the living body. The introduction needle is arranged so as to pass through the seal cap 410 and the rubber stopper 420 and also be inserted through the first flow path 440a of the liquid feeding section 440. The user inserts the liquid feeding unit 440 into the living body together with the introduction needle in a state where the introduction needle is inserted into the first flow path 440a of the liquid feeding unit 440. The user inserts the liquid feeding unit 440 together with the introduction needle into the living body of the patient, then removes the introduction needle from the first flow path 440a of the liquid feeding unit 440, and leaves only the liquid feeding unit 440 in the living body. .. The user administers the drug solution into the living body through the first flow path 440a of the liquid feeding section 440 that is left in the living body. The introduction needle is provided, for example, in a predetermined lancing device (not shown), and is disposed together with the lancing device after the liquid delivery unit 440 is arranged by driving the lancing device.

  The fixing pin 430 fixes the liquid feeding unit 440 to the housing 450. The fixing pin 430 has the lower end portion (lower end portion in FIG. 3) of the fixing pin 430 inserted into the first flow path 440a of the liquid feeding unit 440, and the upper end portion (upper end portion in FIG. 3) of the fixing pin 430. The liquid feeding part 440 is fixed to the housing 450 by caulking the end part) to the housing 450.

  As shown in FIG. 3, the housing 450 has an upper port 451 through which the liquid sending portion 440 is inserted and a chemical liquid port 452 in which the seal member 460 is arranged. The seal member 460 is fitted on the chemical liquid port 452.

  As shown in FIG. 4A, the chemical liquid port 452 is fitted with a flow passage 452a through which the chemical liquid can flow, a distal end portion 452b into which a part of the seal member 460 is inserted, and a proximal end portion 465 of the seal member 460. And a recess 452c to be fitted.

  The seal member 460 includes a first protrusion 461 protruding toward a side opposite to a direction in which the penetrating member 225 penetrates the seal member 460 (a direction indicated by an arrow F1 in FIG. 4A), and a first protrusion 461. A recessed portion 462 formed inside, a penetrating portion 463 that is formed through the penetrating member 225 and is thicker than other portions of the seal member 460, and a straight portion 464 that covers the outer periphery of the chemical liquid port 452, And a base end portion 465 fitted into the recess 452c of the chemical liquid port 452.

  The planar shape of the first convex portion 461 of the seal member 460 has an annular shape surrounding the concave portion 462 located substantially at the center of the seal member 460. The front end surface 460a of the first convex portion 461 has a flat surface shape. The recessed portion 462 is recessed toward the channel 452a side of the chemical liquid port 452 with respect to the first protruding portion 461.

  The straight portion 464 of the seal member 460 has a substantially constant outer diameter in the longitudinal direction of the seal member 460 (left-right direction in FIG. 4A). The base end portion 465 of the seal member 460 projects toward the center side of the seal member 460.

  The penetrated portion 463 of the seal member 460 is formed in the vicinity of the center of the seal member 460 and has a larger wall thickness (direction of arrow F1 in FIG. 4A) than the first convex portion 461.

  The case 310 of the second housing 300 and the housing 450 of the administration port section 400 can be formed of, for example, the same material as that of the housing 210 of the first housing 200.

  The liquid sending section 440 of the administration port section 400 can be formed of a resin material such as polyurethane, nylon, and ethylene-tetrafluoroethylene copolymer (ETFE).

  The seal member 460 is made of various rubber materials such as natural rubber, butyl rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, and silicone rubber, and various types such as polyurethane, polyester, polyamide, olefin, and styrene. It can be formed of a thermoplastic elastomer.

<Pump body>
The pump body 100 is configured to be connectable and separable from the first housing 200. As shown in FIG. 1, the pump body 100 has a case 110 and a drive mechanism 120 arranged in the case 110.

  The drive mechanism 120 includes a motor 121, a gear group 123 that is rotationally driven by the motor 121, and a control unit (not shown) that controls the operation of the motor 121. The control unit can be configured by a known microcomputer including a CPU, a RAM, a ROM and the like.

  When starting the administration of the drug solution by the drug solution administration device 10, the user operates a predetermined controller (not shown) to send an operation command to the control unit of the pump body 100. The user can control the start and stop of the rotation of the gear group 123, the rotation speed of the gear group 123, and the like by transmitting an operation command via the controller.

  The pump body 100 is reusable. The first housing 200 is configured as a disposable member. Therefore, the user can discard and replace the first housing 200 each time the drug solution is dispensed using the drug solution dispenser 10 or frequently within an appropriate range, while the pump body 100 is reused. can do. The pump body 100 and the first housing 200 may be integrally assembled in one housing.

  When starting the administration of the drug solution by the drug solution administration device 10, the user assembles the respective members of the drug solution administration device 10 in the following procedure, for example.

  The user connects the pump body 100 and the first housing 200. Next, the user connects the pump body 100 and the first housing 200 to the case 310 of the second housing 300.

  When connecting the pump body 100 and the first housing 200 to the case 310 of the second housing 300, the user causes the seal member 460 to penetrate the penetrating member 225. The user causes the seal member 460 to penetrate the penetrating member 225 to connect the second flow path 225a of the penetrating member 225 and the flow path 452a of the chemical liquid port 452. The first flow path 440a of the liquid delivery section 440 arranged in the housing 450 of the administration port section 400 communicates with the flow path 452a of the drug solution port 452 via the second flow path 225a of the penetrating member 225.

  FIGS. 4A and 4B show the states before and after the penetrating member 225 penetrates the seal member 460. 4A and 4B are cross-sectional views (cross-sectional views along the longitudinal direction of the chemical liquid port 452) showing the periphery of the cavity 213 and the periphery of the chemical liquid port 452 of the housing 210 in an enlarged manner.

  As shown in FIG. 4A, the user, when penetrating the penetrating member 225 through the seal member 460, faces the housing 210 of the first housing 200 (opposing surface) 213a and the end face 460a of the seal member 460. Are arranged substantially parallel to each other.

  As shown in FIG. 4B, the user brings the housing 210 of the first housing 200 relatively close to the seal member 460 when connecting the first housing 200 and the second housing 300.

  The first protrusion 461 of the seal member 460 contacts the facing surface 213 a of the housing 210 when the penetrating member 225 penetrates the seal member 460. The user moves the tip portion 226 of the penetrating member 225 toward the penetrated portion 463 of the seal member 460 so that the first convex portion 461 of the seal member 460 contacts the facing surface 213a of the housing 210. The user can guide the movement of the penetrating member 225 by the first convex portion 461, and puncture the penetrating member 225 substantially perpendicularly to the penetrated portion 463 of the sealing member 460 until the movement of the penetrating member 225 is stopped. can do. The front end surface 460a of the seal member 460 is arranged substantially parallel to the facing surface 213a of the housing 210. The user can prevent the penetrating member 225 from obliquely penetrating the seal member 460 and deforming the seal member 460 into an inadvertent shape. Therefore, the user can prevent the formation of a gap through which the chemical liquid leaks between the seal member 460 and the flow path 452a of the chemical liquid port 452.

  The first convex portion 461 of the seal member 460 maintains the surface contact state with the housing 210 when the penetrating member 225 penetrates the seal member 460. At this time, if the front end surface 460a of the seal member 460 is substantially parallel to the facing surface 213a of the housing 210, the contact area between the first convex portion 461 and the housing 210 becomes large, and the first protruding portion 461 and the housing 210 are in close contact with each other and the contact portion is Liquid tightly sealed. Therefore, the first convex portion 461 of the seal member 460 can prevent the seal member 460 from being displaced when the penetrating member 225 penetrates the seal member 460 substantially perpendicularly.

  As shown in FIG. 4B, the first protrusion 461 of the seal member 460 is a penetrating member between the housing 210 and the seal member 460 in a state where the first housing 200 and the second housing 300 are connected. A space A1 that surrounds 225 is formed. Since the contact surface between the first convex portion 461 and the housing 210 is in close contact with each other and the space A1 is liquid-tightly sealed, when the chemical liquid leaks from the flow path 452a of the chemical liquid port 452, a predetermined amount of the chemical liquid leaks out. Can hold a chemical solution. Therefore, the user can prevent the chemical liquid from leaking to the outside of the chemical liquid administration device 10 even when the chemical liquid leaks from the flow path 452a of the chemical liquid port 452.

  The first convex portion 461 of the seal member 460 forms a seal portion that prevents the chemical liquid from leaking by coming into contact with the housing 210 when the penetrating member 225 penetrates the seal member 460. Further, the straight portion 464 of the seal member 460 contacts the inner wall surface of the enclosure portion 214 of the housing 210 when the penetrating member 225 penetrates the seal member 460. The straight portion 464 of the seal member 460 forms a seal portion that prevents the chemical solution from leaking between the seal member 460 and the enclosure portion 214 by contacting the inner wall surface of the enclosure portion 214. Therefore, the user can prevent the chemical liquid from leaking out at the two seal portions formed by the first convex portion 461 of the seal member 460 and the straight portion 464 of the seal member 460. At this time, in order to further enhance the liquid tightness between the seal member 460 and the surrounding portion 214, a flange-shaped convex portion may be provided on the straight portion 464 of the seal member 460. As a result, a second space portion may be formed by the first convex portion 461 and the straight portion 464 of the seal member 460 so that the chemical solution can be received when the chemical liquid further leaks from the space portion A1. Further, since the tip end surface 460a of the seal member 460 is disposed substantially parallel to the facing surface 213a of the housing 210 when the chemical liquid port 452 is brought close to the cavity 213 of the housing 210, the inner wall surface of the enclosure portion 214 is arranged. It may be a guide that abuts.

  The operation and effect of the drug solution administration device 10 according to the present embodiment will be described.

  The drug solution administration device 10 according to the present embodiment is provided with a drug solution storage unit 221 capable of storing a drug solution and a first housing 200 including a housing 210 in which the drug solution storage unit 221 is arranged, and a liquid for delivering the drug solution into a living body. A second housing 300 that is provided with a liquid delivery section 440 in which a first flow path 440a is formed and an administration port section 400 in which a seal member 460 is arranged, and is configured to be connectable and separable from the first housing 200. There is. The first housing 200 penetrates the seal member 460 as the first housing 200 and the second housing 300 are connected to each other, thereby penetrating the drug solution storage unit 221 and the first flow path 440a of the liquid delivery unit 440. 225 is provided. The seal member 460 has a first convex portion 461 that protrudes toward the side opposite to the direction in which the penetrating member 225 penetrates the seal member 460.

  In the drug solution administration device 10 configured as described above, when the penetrating member 225 penetrates the seal member 460, the penetrating member 225 penetrates the seal member 460 by the first protrusion 461 formed on the seal member 460. The direction can be guided in the appropriate direction. Therefore, in the drug solution administration device 10, in the state where the drug solution storage unit 221 and the first flow path 440a of the liquid delivery unit 440 are in communication with each other, the sealing property of the seal member 460 arranged in the dosing port unit 400 of the second housing 300 is It is possible to suppress the decrease.

  In addition, the first convex portion 461 forms a space portion A1 that surrounds the periphery of the penetrating member 225 between the housing 210 and the seal member 460 when the first housing 200 and the second housing 300 are connected. The space portion A1 can hold a predetermined amount of liquid medicine in a liquid-tight manner when the liquid medicine leaks from the flow path 452a of the liquid medicine port 452. Therefore, even if the drug solution leaks from the flow path 452a of the drug solution port 452, the drug solution can be prevented from flowing out of the drug solution administration device 10.

  Further, the first convex portion 461 contacts the housing 210 when the penetrating member 225 penetrates the seal member 460, so that the penetrating member 225 penetrates the seal member 460 substantially vertically. To guide the movement of. Therefore, the user can more reliably cause the penetrating member 225 to penetrate the sealing member 460 substantially perpendicularly. Since the penetrated portion 463 near the center of the seal member 460 is thicker than the first convex portion 461 of the seal member 460, even if the penetrated portion 463 is operated a plurality of times, the seal member It is possible to suppress the deterioration of the sealing property of 460. Further, in the state where the first housing 200 and the second housing 300 are connected, even if a strong force is applied to the tip end surface 460a, the shape of the seal member 460 is stable due to the thickness shape of the penetrated portion 463. However, the liquid tightness of the space A1 can be maintained.

(Second embodiment)
Next, a drug solution administration device according to the second embodiment of the present invention will be described. FIG. 5 (A) and FIG. 5 (B) show partial cross-sectional views of the drug solution administration device according to the second embodiment. In the description of the second embodiment, the same points as those in the first embodiment will be omitted as appropriate.

  As shown in FIGS. 5A and 5B, the drug solution administration device according to the second embodiment has a second convex portion 215 formed on the housing 210 of the first housing 200.

  The first protrusion 461 is not formed on the seal member 460. The tip surface 460a of the seal member 460 has a flat surface shape. The seal member 460 has a penetrating portion 463 which is penetrated by the penetrating member 225 and which is formed to be thicker than other portions of the seal member 460.

  The housing 210 has a concave cavity 213 that accommodates the seal member 460 when the first housing 200 and the second housing 300 are connected. The second convex portion 215 is formed inside the surrounding portion 214 arranged in the cavity 213.

  The second convex portion 215 projects in the direction in which the penetrating member 225 penetrates the seal member 460 (the direction indicated by the arrow F2 in FIG. 5A). As shown in FIG. 5B, the second convex portion 215 is arranged at a position where the penetrated portion 463 of the seal member 460 can be pressed. The planar shape of the second convex portion 215 has an annular shape surrounding the outer periphery of the penetrating member 225.

  When the penetrating member 225 penetrates the seal member 460, the second convex portion 215 of the housing 210 contacts the tip end surface 460a of the seal member 460. When the user moves the tip end portion 226 of the penetrating member 225 toward the penetrated portion 463 of the seal member 460, the user presses the seal member 460 with the second convex portion 215 to reduce vibration when pushing the penetrating member 225. Can be made Therefore, the user can puncture the penetrating member 225 substantially perpendicularly to the penetrated portion 463 of the seal member 460 until the movement of the penetrating member 225 stops. The user can dispose the facing surface 213a of the housing 210 and the front end surface 460a of the seal member 460 substantially parallel to each other in a state where the penetrating member 225 penetrates the seal member 460 substantially vertically.

  The second convex portion 215 of the housing 210 presses the penetrated portion 463 of the seal member 460 in a state where the penetrating member 225 penetrates the seal member 460 and bites into the tip end surface 460a of the seal member 460, and the seal member 460. Crush. The second convex portion 215 of the housing 210 can be prevented from being displaced from the seal member 460 by biting into the tip end surface 460a of the seal member 460.

  As shown in FIG. 5B, the second convex portion 215 of the housing 210 is a penetrating member between the housing 210 and the seal member 460 in a state where the first housing 200 and the second housing 300 are connected. A space A2 surrounding the periphery of 225 is formed.

  The effects of the drug solution administration device according to the present embodiment will be described.

  The housing 210 of the drug administration device according to the second embodiment has a second convex portion 215 protruding in a direction in which the penetrating member 225 penetrates the seal member 460. When the penetrating member 225 penetrates the seal member 460, the user presses the seal member 460 with the second convex portion 215 formed on the housing 210 to reduce vibration when the penetrating member 225 is pushed in, and The member 225 can be pierced substantially perpendicularly to the penetrated portion 463 of the seal member 460 until the end. Therefore, in the drug solution administration device according to the present embodiment, the seal member 460 arranged in the dosing port part 400 of the second housing 300 in the state where the drug solution storage part 221 and the first flow path 440a of the liquid sending part 440 are in communication with each other. It is possible to suppress the deterioration of the sealing property.

  Further, the housing 210 has a concave cavity 213 that accommodates the seal member 460 when the first housing 200 and the second housing 300 are connected. The second protrusion 215 contacts the seal member 460 when the seal member 460 is housed in the cavity 213. Therefore, when the user performs the work of connecting the first housing 200 and the second housing 300, the user accommodates the seal member 460 in the cavity 213, and at the same time, installs the seal member 460 by the second convex portion 215 arranged in the cavity 213. Can be pressed. Therefore, the user can easily perform the work for suppressing the deterioration of the sealing property of the seal member 460.

  The seal member 460 has a penetrating portion 463 which is penetrated by the penetrating member 225 and which is formed to be thicker than other portions of the seal member 460. The second convex portion 215 is arranged at a position capable of pressing the penetrated portion 463 of the seal member 460. Therefore, when the user connects the first housing 200 and the second housing 300, the user can cause the second convex portion 215 to bite into the penetrated portion 463 of the seal member 460 and sufficiently crush the penetrated portion 463. You can Even when the crushed amount of the penetrated portion 463 is large and a large pressure is locally applied by the second convex portion 215, the penetrated portion 463 is formed to have a large thickness and thus the seal member 460 is formed. The shape of can be kept stable. Thereby, the user can effectively prevent the second convex portion 215 from being displaced from the seal member 460.

(Third Embodiment)
Next, a drug solution administration device according to the third embodiment of the present invention will be described. FIG. 6 (A) and FIG. 6 (B) show partial cross-sectional views of the drug solution administration device according to the third embodiment. In the description of the third embodiment, description of the same points as those of the first and second embodiments will be appropriately omitted.

  As shown in FIGS. 6 (A) and 6 (B), the drug solution administration device according to the third embodiment has a first protrusion 461 formed on the seal member 460 and a second protrusion 461 formed on the housing 210. And a convex portion 215.

  As shown in FIG. 6B, the first convex portion 461 is arranged at a position surrounding the outer peripheral surface of the second convex portion 215 in a state where the first housing 200 and the second housing 300 are connected to each other, and A space A3 that surrounds the periphery of the penetrating member 225 is formed between 210 and the seal member 460.

  When penetrating the penetrating member 225 through the seal member 460, the user can guide the penetrating direction in which the penetrating member 225 penetrates the seal member 460 in an appropriate direction by the first protrusion 461. Further, the second convex portion 215 can suppress the vibration when the seal member 460 is pressed and the penetrating member 225 is pressed. Therefore, the drug solution administration device according to the present embodiment can pierce the penetrating member 225 substantially perpendicularly to the penetrated portion 463 of the seal member 460 until the movement of the penetrating member 225 stops. In the state where the drug solution storage unit 221 and the first flow path 440a of the liquid delivery unit 440 are in communication with each other, it is possible to more reliably prevent the sealing property of the seal member 460 arranged in the administration port unit 400 of the second housing 300 from being deteriorated. it can.

  Further, in the drug solution administration device according to the present embodiment, the first convex portion 461 is arranged so as to surround the outer peripheral surface of the second convex portion 215 in the state where the penetrating member 225 penetrates the seal member 460. The space between the first convex portion 461 and the second convex portion 215 can be doubly sealed. Therefore, in the space A3, the sealing property between the seal member 460 and the housing 210 can be further improved.

  Further, in the drug solution administration device according to the present embodiment, when penetrating the penetrating member 225 through the seal member 460, the second convex portion 215 moves while being guided by the inner wall surface of the concave portion 462 of the seal member 460. Can be more appropriately guided. In addition, the first convex portion 461 of the seal member 460 and the second convex portion 215 of the housing 210 can further improve the sealing performance around the chemical liquid port 452.

  The positional relationship between the first convex portion 461 and the second convex portion 215 is not particularly limited. For example, the second protrusion 215 may be arranged so as to surround the outer peripheral surface of the first protrusion 461 when the penetrating member 225 penetrates the seal member 460.

  As described above, the drug solution administration device according to the present invention has been described through the embodiments, but the present invention is not limited only to the contents described in the specification, and can be appropriately changed based on the description of the claims. Is.

  For example, the shape of the seal member, the shape of the first convex portion, the shape of the second convex portion, and the like are not limited to those described in the drawings, and can be changed as appropriate.

  Further, the drug solution administration device is not limited to the contents described in the specification, and the material and arrangement of each member, the connection form between the members and the like can be appropriately changed.

10 drug administration device,
100 pump body,
110 cases,
120 drive mechanism,
200 first housing,
210 housing,
213 cavity,
214 enclosure,
215 2nd convex part,
220 liquid transfer mechanism,
221 drug solution storage unit,
225 penetrating member,
225a the second passage of the penetrating member,
226 the tip of the penetrating member,
300 second housing,
310 cases,
400 administration port section,
440 liquid delivery section,
440a First flow path (flow path) of the liquid feeding section,
450 housing,
452 chemical solution port,
452a chemical fluid port flow path,
460 seal member,
460a a tip surface of the seal member,
461 first convex portion,
463 Penetration part,
Space A1, A2, A3.

Claims (7)

A first housing including a drug solution storage unit capable of storing a drug solution and a housing in which the drug solution storage unit is disposed;
A second housing that is provided with a liquid delivery section in which a flow path for delivering the drug solution into the living body and an administration port section in which a seal member is disposed, and is configured to be connectable and separable from the first housing; Have
The first housing includes a penetrating member that communicates with the flow path of the liquid solution storage section and the liquid delivery section by penetrating the seal member in connection with the connection between the first housing and the second housing. ,
A first convex portion formed on the seal member, the first protrusion protruding toward the side opposite to the direction in which the penetrating member penetrates the seal member, and the penetrating member formed on the housing, the penetrating member penetrating the seal member. A medical-solution administration device having at least one of the second convex portions protruding in the direction.   The first convex portion and the second convex portion form a space portion surrounding the periphery of the penetrating member between the housing and the sealing member in a state where the first housing and the second housing are connected. The drug solution administration device according to claim 1, which is formed. Having the first convex portion,
When the penetrating member penetrates the seal member, the first convex portion comes into contact with the housing to move the penetrating member so that the penetrating member penetrates substantially perpendicular to the seal member. The drug solution administration device according to claim 1 or 2, which guides the liquid medicine. Having the second convex portion,
The housing has a concave cavity that accommodates the seal member in a state where the first housing and the second housing are connected to each other,
The said 2nd convex part is a chemical | medical solution administration apparatus of any one of Claims 1-3 which contact | abuts the said sealing member in the state with which the said sealing member was accommodated in the said cavity. The seal member has a penetrated portion that is formed to be thicker than other portions of the seal member while the penetrating member is penetrated,
The drug solution administration device according to claim 4, wherein the second convex portion is arranged at a position capable of pressing the penetrated portion of the seal member.   The drug solution administration device according to claim 1, comprising the first convex portion and the second convex portion.   The drug solution administration device according to claim 6, wherein the first convex portion is arranged at a position surrounding an outer peripheral surface of the second convex portion in a state where the first housing and the second housing are connected to each other.