KR102515615B1 - Apparatus for Infusing medical liquid - Google Patents

Abstract

The present invention provides a chemical solution injection device, comprising: a base body, a needle assembly mounted on the base body, a reservoir fluidly connected to the needle assembly, and having an inlet end through which a chemical solution is injected; It includes a sealing member to be mounted, and a guide cap mounted to the base body or the reservoir so as to face the sealing member.

Description

Medicine liquid injection device {Apparatus for Infusing medical liquid}

The present invention relates to a device for injecting a liquid medicine.

In general, a drug solution injection device such as an insulin injection device is used to inject a drug solution into a patient's body. Such a liquid injection device is also used by professional medical personnel such as doctors and nurses, but in most cases, it is used by ordinary people such as patients themselves or their guardians.

In the case of a diabetic patient, especially a pediatric diabetic patient, it is necessary to inject a drug solution such as insulin into the human body at regular intervals. A drug injection device in the form of a patch attached to the human body for a certain period of time is being developed, and this drug injection device can be used while being attached to the body such as the abdomen or waist of a patient for a certain period of time.

In order to increase the effect through drug injection, the drug injection device needs to control the precise injection of the drug into the patient's body, and it is important to precisely inject a small amount of the drug through the small drug injection device.

When attached to the human body, the drug injection device needs to be comfortable to wear, convenient to use, durable, and driven with low power. In particular, since the drug injection device is used by being directly attached to the patient's skin, it is important for the user to drive the drug injection device conveniently and safely.

Publication No. 10-2020-0019528 (2020.02.24.)

The present invention provides a drug solution injection device that operates safely and can accurately store and deliver drugs.

One aspect of the present invention is a base body, a needle assembly mounted on the base body, a reservoir fluidly connected to the needle assembly and having an inlet end into which a chemical liquid is injected, and a seal mounted on the inlet end. A member and a guide cap mounted on the base body or the reservoir to face the sealing member.

In addition, the guide cap may have a flange mounted on a seating end of the base body, and an inclined end extending inwardly from the flange and reducing an open cross-sectional area.

In addition, the guide cap may further include a wing piece extending outwardly from the flange and supported by the base body.

In addition, the guide cap may have a curved surface in a region where the flange and the inclined end are connected.

In addition, the guide cap may be inserted to a predetermined depth on the surface of the base body.

The drug solution injection device according to an embodiment of the present invention guides the injection needle to be inserted into a predetermined precise position in order to inject the drug solution, so that the drug can be safely stored in a reservoir.

In the drug injection device according to an embodiment of the present invention, when the injection needle is inserted to inject the drug solution, no foreign matter is generated due to scratching, so that high safety of the drug solution injection device can be secured.

The drug injection device according to an embodiment of the present invention minimizes contact with external foreign substances, and the user can easily insert the injection needle of the drug solution injector into the reservoir.

In the chemical solution injection device according to an embodiment of the present invention, a path through which sterilization gas moves for disinfection is set, so that the safety of the drug solution injection device can be increased. Of course, the scope of the present invention is not limited by these effects.

1 is a block diagram showing a liquid medicine injection system according to an embodiment of the present invention.
2 is a perspective view showing a chemical solution injection device according to an embodiment of the present invention.
3 is an exploded perspective view of the chemical solution injection device of FIG. 2;
Fig. 4 is a perspective view showing a section of a part of the chemical solution injection device of Fig. 2;
Figure 5 is a perspective view showing the guide cap of Figure 4;
FIG. 6 is a view showing a partial cross-section of the chemical solution injection device of FIG. 2 .
7 is a partial cross-sectional view of a chemical solution injection device according to another embodiment of the present invention.
Figure 8 is a cross-sectional view showing the coupling relationship of the sterilization cover of Figure 4;

Since the present invention can apply various transformations and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and methods for achieving them will become clear with reference to the embodiments described later in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and when describing with reference to the drawings, the same or corresponding components are assigned the same reference numerals, and overlapping descriptions thereof will be omitted. .

In the following examples, expressions in the singular number include plural expressions unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have mean that features or components described in the specification exist, and do not preclude the possibility that one or more other features or components may be added.

When an embodiment is otherwise implementable, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order reverse to the order described.

In the drawings, the size of components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the following embodiments are not necessarily limited to those shown.

1 is a block diagram showing a chemical solution injection system 1 according to an embodiment of the present invention.

Referring to FIG. 1 , the drug injection system 1 may include a drug injection device 10 , a user terminal 20 , a controller 30 and a biometric sensor 40 . In the drug injection system 1, a user can drive and control the system using the user terminal 20, and based on blood sugar information monitored by the biometric information sensor 40, the drug solution injection device 10 administers the drug solution. It can be injected periodically.

The drug injection device 10 injects drugs to be injected into the user, such as insulin, glucagon, anesthetics, painkillers, dopamine, growth hormone, and smoking cessation aids, based on data sensed by the biometric sensor 40. also perform a function.

In addition, the liquid medicine injection device 10 may transmit a device status message including information on the remaining battery capacity of the device, whether or not booting of the device was successful, whether injection was successful, etc. to the controller 30 . Messages delivered to the controller may be delivered to the user terminal 20 via the controller 30 . Alternatively, the controller 30 may transmit improved data obtained by processing the received messages to the user terminal 20 .

In one embodiment, the drug injection device 10 is provided separately from the biometric information sensor 40 and may be installed to be spaced apart from the target object. In another embodiment, the drug injection device 10 and the biometric information sensor 40 may be provided in one device.

In one embodiment, the drug solution injection device 10 may be mounted on the user's body. Also, in another embodiment, the drug solution injection device 10 may be mounted on an animal to inject the drug solution.

The user terminal 20 may receive an input signal from a user in order to drive and control the drug solution injection system 1 . The user terminal 20 may generate a signal for driving the controller 30 and control the controller 30 to drive the drug injection device 10 . In addition, the user terminal 20 may display biometric information measured by the biometric information sensor 40 and state information of the drug injection device 10 .

The user terminal 20 refers to a communication terminal usable in a wired/wireless communication environment. For example, the user terminal 20 may include a smart phone, a tablet PC, a PC, a smart TV, a mobile phone, a personal digital assistant (PDA), a laptop, a media player, a micro server, a global positioning system (GPS) device, an e-book reader, It may be a terminal for digital broadcasting, a navigation device, a kiosk, an MP3 player, a digital camera, a home appliance, a device equipped with a camera, and other mobile or non-mobile computing devices. Also, the user terminal 2 may be a wearable device having a communication function and a data processing function, such as a watch, glasses, a hair band, and a ring. However, as described above, a terminal equipped with an application capable of internet communication may be borrowed without limitation.

The user terminal 20 may be connected one-to-one with the pre-registered controller 30 . The user terminal 20 may be encrypted and connected to the controller 30 in order to prevent the controller 30 from being driven and controlled by an external device.

In one embodiment, the user terminal 20 and the controller 30 may be separated and provided as separate devices. For example, the controller 30 may be provided to a subject equipped with the drug injection device 10, and the user terminal 20 may be provided to the subject or a third person. Since the user terminal 20 is driven by the guardian, the safety of the drug injection system 1 can be increased.

In another embodiment, the user terminal 20 and the controller 30 may be provided as a single device. The controller 30 provided as one with the user terminal 20 communicates with the drug injection device 10 to control the injection of the drug.

The controller 30 performs a function of transmitting and receiving data to and from the drug injection device 10, transmits a control signal related to the injection of drugs such as insulin to the drug injection device 10, and transmits blood sugar from the biometric information sensor 40. It is possible to receive a control signal related to the measurement of a biometric value such as the like.

For example, the controller 30 may transmit an instruction request to measure the current state of the user to the drug injection device 10 and receive measurement data from the drug injection device 10 in response to the instruction request.

The biometric information sensor 40 may perform a function of measuring biometric values such as a user's blood sugar level, blood pressure, heart rate, etc. according to a purpose. Data measured by the biometric information sensor 40 may be transmitted to the controller 30, and a drug cycle and/or injection amount may be set based on the measured data. Data measured by the biometric information sensor 40 may be transmitted to the user terminal 20 and displayed.

As an example, the biometric information sensor 40 may be a sensor that measures a blood sugar level of an object. It may be a continuous glucose monitoring (CGM) sensor. A continuous blood glucose measurement sensor may be attached to a subject to continuously monitor a blood glucose level.

The user terminal 20 , the controller 30 and the drug injection device 10 may perform communication using a network. For example, the network may include a Local Area Network (LAN), a Wide Area Network (WAN), a Value Added Network (VAN), a mobile radio communication network, a satellite communication network, and any of these It is a comprehensive data communication network that includes mutual combinations and allows each network constituent entity to communicate smoothly with each other, and may include wired Internet, wireless Internet, and mobile wireless communication network. In addition, wireless communication, for example, wireless LAN (Wi-Fi), Bluetooth, Bluetooth low energy (Bluetooth low energy), Zigbee, WFD (Wi-Fi Direct), UWB (ultra wideband), infrared communication (IrDA, infrared Data Association), NFC (Near Field Communication), 5G, etc. may exist, but are not limited thereto.

FIG. 2 is a perspective view showing a chemical solution injection device 10 according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of the chemical solution injection device 10 of FIG. 2 .

Referring to FIGS. 2 and 3 , the drug solution injection device 10 is attached to a user to inject the drug solution, and may inject the drug solution stored therein in a predetermined amount to the user.

The drug solution injection device 10 may be used for various purposes depending on the type of the injected drug solution. For example, the drug solution may include an insulin-based drug solution for diabetics, other pancreas drug solutions, and other various types of drug solutions for the heart.

An embodiment of the drug solution injection device 10 may include a housing 11 covering the outside and an attachment portion 12 positioned adjacent to the user's skin. The chemical solution injection device 10 includes a plurality of parts disposed in an inner space between the housing 11 and the attachment part 12 . A separate bonding means may be further interposed between the attachment part 12 and the user's skin, and the drug solution injection device 10 may be fixed to the skin by the bonding means.

The drug injection device 10 includes a needle assembly 100, a reservoir unit 200, a driving module 300, a battery 350, a driving unit 400, a clutch unit 500, a trigger member 600, a needle A cover assembly 700 and an alarm unit 800 may be included.

In the chemical solution injection device 10, the base body may form a frame in which at least one body supports internal components. The base body may have a first body 13, a second body 14, and a third body 15 according to arrangement.

The first body 13 is disposed under the housing 11, and the needle assembly 100, the reservoir unit 200, the driving module 300, the battery 350, etc. may be supported in each opening or groove. there is. The second body 14 is disposed under the first body 13 and may be connected to the attachment part 12 . The second body 14 may cover the lower portion of the chemical solution injection device 10 . The third body 15 is disposed above the first body 13 and supports the reservoir unit 200, the driving module 300, the battery 350, the driving unit 400, etc. in each opening or groove. It can be. In the drawings, the first body 13, the second body 14, and the third body 15 are shown, but are not limited thereto and may be integrally provided or provided in plurality.

A control module may be disposed inside the drug injection device 10 . A control module (not shown), which is a circuit board, is disposed under the second body 14 and can control the overall driving of the chemical solution injection device 10 . The control module (not shown) may electrically contact the driving module 300, the battery 350, the alarm unit 800, and a plurality of sensors (not shown) to control their driving.

The needle assembly 100 may be mounted on the first body 13 . In the needle assembly 100, the needle N and/or the cannula may move in an axial direction by rotation of the sleeve 110.

One end of the needle N may be connected to the reservoir unit 200 to deliver the drug solution, and the other end may be inserted into the cannula and moved along the cannula.

Since the cannula has a conduit shape capable of accommodating the needle (N), the liquid discharged from the needle (N) can be injected into the user.

The cannula remains inserted into the user's skin, but the needle N rises and is separated from the object. However, the cannula and the needle (N) form a path through which the fluid moves, so that the drug solution injected from the reservoir 210 can be injected into the user through the needle (N) and the cannula.

In the drug injection device 10, a user may simply rotate the needle assembly 100 to insert a cannula into a subject and start drug injection.

The reservoir unit 200 is mounted on the first body 13 and the third body 15, and is connected to the needle assembly 100. The reservoir unit 200 stores the chemical solution (D) in the internal space, and can move the chemical solution to the needle (N) in a fixed amount according to the movement of the plunger disposed therein. The reservoir unit 200 may include a reservoir 210, a cap cover, a plunger, and a sealing ring.

The reservoir 210 may extend to a predetermined length in the longitudinal direction and store the chemical liquid in the internal space. In the reservoir 210, the chemical solution may be discharged to the needle N by movement of the plunger.

The reservoir 210 may have an inlet end 210I and an outlet end. The chemical solution is injected into the inlet end 210I, the needle N is installed at the outlet end, and the chemical solution can be discharged through the needle N.

The inlet end 210I is connected to the lower part of the drug injection device 10, and the drug may be injected by the drug injector NI. A sealing member 260 is disposed at the inlet end 210I, and the sealing member 260 can prevent leakage of the chemical solution. The inlet end 210I may be connected to the guide groove 211.

The outlet end is disposed spaced apart from the inlet end 210I and is connected to the needle N so that the drug can be discharged. The exit end may be connected to the guide groove 211.

The guide groove 211 may be disposed on an inner surface of the reservoir 210 . At least a portion of the guide groove 211 may extend to connect between the inlet end 210I and the outlet end.

The guide groove 211 may form a path for guiding gas remaining in the inner space of the reservoir 210 to the needle assembly 100 . Inside the reservoir 210, more specifically, in the gap between the front end of the reservoir 210 and the plunger, there is gas (air) remaining in the assembly or manufacturing process. When the drug is injected into the reservoir 210 through the external drug injector NI, the gas may be discharged through the needle N along the guide groove 211.

The guide cap 250 is disposed to face the sealing member 260 and may be mounted on the base body. The guide cap 250 is disposed adjacent to the sealing member 260 and may guide insertion and movement of injection needles of the liquid injector NI.

The guide cap 250 may be inserted into the second body 14 and disposed below the opening 12H of the attachment part 12 . In detail, the sealing member 260 is mounted between the second body 14 and the reservoir 210, and the guide cap 250 faces the sealing member 260 and is in the opening of the second body 14. is fitted When the user inserts the injection needle of the drug injector NI, it passes through the guide cap 250 and passes through the sealing member 260 .

The guide cap 250 may have a flange 251, an inclined end 252, and a wing piece 253.

The flange 251 may be mounted on the seating end of the base body. The second body 14 has a flat seating end, and is inserted so that the flange 251 contacts the seating end.

The inclined end 252 extends from the flange 251 and has a slope such that the open cross-sectional area is reduced. The inclined end 252 may extend from the flange 251 to the sealing member 260 so that the cross-sectional area is reduced. Therefore, the opening area of the flange 251 is larger than the opening area at the end of the inclined end 252 .

The inclined end 252 may guide the injection needle of the drug injector NI to be inserted into a preset position. When the user inserts the drug injector NI, the injection needle of the drug injector NI may be inserted into a certain position by the inclined end 252 .

The wing piece 253 extends outward from the flange 251 and may be supported by the base body. A plurality of wing pieces 253 may be spaced apart from the outside of the flange 251 . Since the wing pieces 253 are spaced apart from each other, they can be inserted into the second body 14 by applying force with an external device (not shown).

In the second body 14, insertion grooves 14G into which wing pieces 253 are inserted may be spaced apart from each other, and protrusions 14P supporting the flange 251 may be disposed between the insertion grooves 14G. . The wing piece 253 may be inserted into the insertion groove 14G of the second body 14, and the guide cap 250 may be fixed to the second body 14. The wing piece 253 may be supported on the side wall of the insertion groove 14G by elasticity and rigidity. In addition, the upper end of the flange 251 may be supported by the protrusion 14P to set the position. The fixed structure of the wing piece 253 and the protrusion 14P can stably couple the guide cap 250 to the second body 14 .

The guide cap 250 may have a curved surface in an area where the flange 251 and the inclined end 252 are connected. Since the portion where the flange 251 and the inclined end 252 meet is smoothly connected, the injection needle of the liquid injector NI can be gently inserted into the sealing member 260 along the inclined end 252 .

The guide cap 250 may be formed of a material having a predetermined rigidity. For example, the guide cap 250 may be made of a metal material, and for example, the guide cap 250 may be made of a SUS-based material.

The rigidity of the guide cap 250 may be set greater than the rigidity of the injection needle of the drug injector NI. The guide cap 250 may have rigidity not to be scratched by injection needles of the drug injector NI. That is, since the rigidity of the guide cap 250 is greater than the rigidity of the injection needle of the chemical injector NI, even if the guide cap 250 is scratched when the chemical injector NI is inserted, foreign substances such as debris are removed from the reservoir 210. ) does not flow into

The guide cap 250 may be inserted to a predetermined depth on the surface of the base body. The guide cap 250 is disposed below the surface of the second body 14 and mounted so as to be entered from the lower surface of the liquid injection device 10 . Since the guide cap 250 does not protrude to the outside, it is possible to prevent foreign substances from entering the reservoir 210 .

The guide cap 250 is mounted on an open part of the liquid injection device 10 so that a user can see it from the outside. Since the user can recognize the position of the guide cap 250 through the openings of the attachment part 12 and the second body 14, the injection needle of the drug injector NI is easily and accurately positioned at the center of the guide cap 250. It is possible to align and insert the injection needle into the sealing member 260 .

The sealing member 260 has a first part 261 having a first width, and the first part 261 is inserted into the inlet end 210I of the reservoir 210 . The sealing member 260 has a second part 262 having a second width greater than the first width, and extends from an end of the first part 261 . Since the upper part of the second part 262 is supported by the second body 14 and the lower part is supported by the inlet end 210I, the position of the sealing member 260 is firmly fixed. That is, since the sealing member 210 is supported by the second part 262 at the inlet end 210I of the reservoir 210, leakage of the chemical solution from the reservoir 210 can be completely prevented.

Referring back to FIG. 3 , the driving module 300 may generate driving force and transmit the driving force to the driving unit 400 . The driving force transmitted by the driving unit 400 linearly moves the plunger inside the reservoir 210 to discharge the liquid medicine.

When the drive units 400 are engaged with each other by the clutch unit 500, the drive module 300 rotates the drive wheel of the drive unit 400, and the rotation of the drive wheel moves the rod linearly so that the plunger moves. can move

The drive module 300 may be any type of device having a power to suck in the chemical solution and to discharge the chemical solution by electricity. For example, all types of pumps such as mechanical displacement type micropumps and electromagnetic motion type micropumps can be used. The mechanical displacement type micropump is a pump that uses the movement of solids or fluids such as gears or diagrams to create a pressure difference to induce fluid flow. Diaphragm displacement pumps, fluid displacement pumps ), and rotary pumps. An electrokinetic micropump is a pump that uses energy in the form of electricity or magnetism directly to move a fluid, and includes an electrohydrodynamic pump (EHD), an electroosmotic pump, and a magnetohydrodynamic pump ( Magneto hydrodynamic pump) and Electro wetting pump.

The battery 350 may supply electricity to the liquid medicine injection device 10 to activate each part. The figure shows a pair of batteries 350, but is not limited thereto, and may be variously set according to the capacity, use range, use time, etc. of the liquid injection device 10.

The battery 350 is disposed adjacent to the driving unit 400 and may supply electricity to the driving unit 400 . In addition, the battery 350 is connected to the control module, and based on the electrical signal measured by the sensor unit, the rotational speed or rotational speed of the drive unit 400, the amount of chemical liquid stored in the reservoir 210, and the amount of liquid injected into the user It is possible to measure data on the amount of liquid medicine and the like.

The driving unit 400 may be installed between the driving module 300 and the reservoir unit 200 to move the plunger disposed in the reservoir 210 with driving force generated by the driving module 300 . However, the driving unit 400 can move the plunger 230 only when the rod and the driving wheel are coupled or connected by a clutch unit.

The clutch unit 500 may drively connect the driving module 300 and the driving unit 400 . The clutch unit 500 is disposed between the rod and the driving wheel, and may include a coupler and a connecting member.

The trigger member 600 may generate a mechanical signal for injecting the drug solution of the drug solution injection device 10 . The trigger member 600 is rotatably disposed on one side of the third body 15, the trigger member 600 rotates to start driving the driving module 300, and at the same time the clutch unit 500 drives the driving unit ( 400) can be driven.

The trigger member 600 may be rotated in one direction around a pivot axis. At this time, the trigger member 600 may apply force to the clutch unit 500 to couple the rod and the driving wheel.

Needle cover assembly 700 may be mounted below needle assembly 100 . The needle cover assembly 700 may prime air stored in the reservoir unit 200 before injecting the liquid medicine. Through the chemical liquid injector (NI), when the chemical liquid is in the reservoir 210, gas (air) remaining in the reservoir 210 may be discharged to the outside.

The needle cover assembly 700 may have a first cover 710 , a second cover 720 , a filter member 730 and an adhesive layer 740 .

The first cover 710 may be disposed under the chemical solution injection device 10 . The second cover 720 may be inserted and assembled into the opening of the first cover 710 .

The second cover 720 is assembled to the first cover 710, and a needle N and/or a cannula may be aligned in the center. The second cover 720 is penetrated in the center in the height direction and may have a storage space in which the chemical solution D is stored.

The first cover 710 has greater rigidity than the second cover 720 . The first cover 710 is a portion exposed to the outside, and is formed of a material with a slightly greater rigidity. The second cover 720 is assembled to the first cover 710 and is formed of a material having less rigidity than the first cover 710 in order to be inserted into the opening of the second body 14 . A protrusion 721 inserted into the second body 14 may be provided at the center of the second cover 720 .

The filter member 730 is mounted on the second cover 720 . The filter member 730 is disposed under the storage space of the second cover 720, and gas such as air passes through the filter member 730, but liquid such as chemical does not pass through the filter member 730. Thus, the air discharged from the needle (N) passes through the filter member 730 and is discharged to the outside, but the chemical liquid discharged from the needle (N) is a storage space defined by the second cover 720 and the filter member 730. can be stored in

The shape of the filter member 730 may change according to the amount of liquid medicine stored in the storage space. For example, when the storage space is filled with the chemical solution, the filter member 730 expands downward, so that the user can recognize that the chemical solution has flowed into the needle cover assembly 700 .

The adhesive layer 740 is disposed on one surface of the needle cover assembly 700 and may attach the needle cover assembly 700 to the attachment part 12 .

The alarm unit 800 is disposed inside or outside the chemical solution injection device 10 and can notify a user of normal operation or malfunction of the drug solution injection device 10 .

For example, the alarm unit 800 is disposed below the housing 11 and is connected to a circuit board. The alarm unit 800 may generate a warning sound or generate light to deliver an alarm to an external user.

The drug solution injection device 10 according to an embodiment of the present invention guides the injection needle to be inserted into a preset precise position to inject the drug solution, so that the drug can be safely stored in the reservoir 210 . When inserting the injection needle of the drug injector (NI) into the reservoir 210 to inject the drug, the needle of the drug injector (NI) will be stably inserted into the preset precise position according to the guidance of the guide cap (250). can

In the chemical solution injection device 10 according to an embodiment of the present invention, when the injection needle is inserted to inject the drug solution, foreign substances are not generated due to scratches, so that high safety of the drug solution injection device can be secured. The rigidity of the guide cap 250 is set greater than the rigidity of the injection needle of the liquid injector NI. Even if the injection needle scratches the guide cap 250, foreign substances such as debris are not generated from the guide cap 250, so that the liquid medicine can be safely stored in the reservoir 210.

The drug solution injection device 10 according to an embodiment of the present invention minimizes contact with external foreign substances, and a user can easily insert the injection needle of the drug solution injector NI into the reservoir 210 . The guide cap 250 is installed at a predetermined depth from the lower surface of the liquid injection device 10 to block foreign substances from the external environment from being introduced. In addition, since the guide cap 250 is exposed so that the user can see it from the outside, the user can easily and simply insert the injection needle of the drug injector NI.

7 is a partial cross-sectional view of a chemical solution injection device according to another embodiment of the present invention.

Referring to FIG. 7 , in the drug injection device, a guide cap 250A may be disposed at an inlet end 210I of a reservoir 210, and a sealing member 260 may be disposed above the guide cap 250A.

The guide cap 250A is disposed between the inlet end 210I of the reservoir 210 and the sealing member 260 to guide the movement of the injection needle of the drug injector NI and the movement of the chemical solution. .

The guide cap 250A may have a flange 251A and an inclined end 252A. The flange 251A is mounted on the outside of the inlet end 210I, and the inclined end 252A may be inserted inside the inlet end 210I. The flange 251A fixes the position of the guide cap 250A and may be supported by the sealing member 260 .

The inclined end 252A is connected to the reservoir 210 at the outlet and the chemical solution is introduced through the injection needle at the inlet. Since the inclined end 252A has a predetermined inclination, it can guide the movement of the liquid medicine.

The rigidity of the inclined end 252A may be set higher than that of the injection needle of the drug injector NI. Even if the injection needle of the drug injector NI scratches the surface of the inclined end 252A, foreign substances do not flow into the reservoir 210.

The sealing member 260 is disposed on top of the guide cap 250A to prevent leakage of the liquid from the reservoir 210 . In addition, in order to inject the chemical solution into the reservoir 210, an injection needle may be inserted into the sealing member ().

The sealing member 260 may be set to be transparent or translucent so that the guide cap 250A can be seen. Since the drug solution is safely stored in the reservoir 210 when the injection needle is inserted into the center of the guide cap 250A, it is important for the user to insert the injection needle into the center of the guide cap 250A. Since the user can see the guide cap 250A through the sealing member 260, the injection needle can be accurately inserted into the guide cap 250A.

The drug solution injection device 10 according to an embodiment of the present invention guides the injection needle to be inserted into a preset precise position to inject the drug solution, so that the drug can be safely stored in the reservoir 210 . When inserting the injection needle of the drug injector (NI) into the reservoir 210 to inject the drug, the needle of the drug injector (NI) will be stably inserted into the preset precise position according to the guidance of the guide cap (250A). can

In the chemical solution injection device 10 according to an embodiment of the present invention, when the injection needle is inserted to inject the drug solution, foreign substances are not generated due to scratches, so that high safety of the drug solution injection device can be secured. The rigidity of the guide cap 250A is set greater than the rigidity of the injection needle of the drug injector NI. Even if the injection needle scratches the guide cap 250A, since foreign substances such as debris are not generated from the guide cap 250A, the liquid medicine can be safely stored in the reservoir 210.

In the drug solution injection device 10 according to an embodiment of the present invention, a user can easily insert the injection needle of the drug solution injector NI into the reservoir 210 . Since the sealing member 250A is formed of a transparent or translucent material and the guide cap 250A is exposed so that the user can see it from the outside, the user can easily and simply insert the injection needle of the drug injector NI.

Figure 8 is a cross-sectional view showing the coupling relationship of the sterilization cover 270 of Figure 4.

Referring to FIG. 8 , the sterilization cover 270 is disposed at the lower end of the chemical solution injection device 10, and sterilization gas can be injected.

Since the drug solution injection device 10 is a device attached to the human body, each part must be disinfected before being attached to the user. After each component of the drug injection device 10 is assembled, sterilization gas (SG) may be injected into the sterilization cover 270 to sterilize internal components of the drug injection device 10 .

Gases such as sterilizing gas pass through the sterilization cover 270, but liquids such as chemical solutions do not pass through the sterilization cover 270. Therefore, when the sterilizing gas (SG) is injected into the sterilizing cover 270, the sterilizing gas passes through the second body 14 and flows into the inner space of the liquid medicine injection device 10. The sterilizing gas (SG) may improve the safety of the chemical solution injection device 10 by sterilizing each internal part.

An opening 14OP is formed in the second body 14 at a position facing the sterilization cover 270 so that the sterilization gas can move into the internal space.

A path through which the sterilizing gas (SG) can move may be set inside the second body 14 . the second body 14 and

A movement path 14G of a gap or groove is formed between the control modules 16 so that the sterilizing gas SG passing through the opening 14OP can move inside.

In the chemical solution injection device 10 according to an embodiment of the present invention, a path along which the sterilizing gas (SG) moves is set for disinfection, so that the safety of the drug solution injection device 10 can be increased.

The spirit of the present invention should not be limited to the above-described embodiments and should not be determined, and not only the claims to be described later, but also all ranges equivalent to or equivalently changed to these claims fall within the scope of the spirit of the present invention. would be said to belong.

1: liquid medicine injection system
10: chemical solution injection device
100: needle assembly
200: reservoir unit
300: drive module
400: drive unit
500: clutch unit
600: trigger absence
700: needle cover assembly
800: alarm unit

Claims (6)

A drug solution injection device for storing a drug solution received from an injection needle of an external drug solution injector,
base body;
A needle assembly mounted on the base body;
a reservoir having an outlet end fluidly connected to the needle assembly and an inlet end into which the liquid medicine is injected;
a sealing member mounted to the inlet end; and
A guide cap disposed at the inlet end and mounted on the base body or the reservoir so as to face the sealing member,
The reservoir
The drug solution injection device, wherein the drug solution is injected into an internal space from the injection needle inserted into the guide cap and passing through the sealing member. According to claim 1,
The guide cap
A flange mounted on the seating end of the base body; and
Doedoe extending inward from the flange, the inclined end of which the open cross-sectional area is reduced; having a, chemical solution injection device. According to claim 2,
The guide cap
The chemical solution injection device further comprising: a wing piece extending outward from the flange and supported by the base body. According to claim 2,
The guide cap
A chemical solution injection device having a curved surface in a region where the flange and the inclined end are connected. According to claim 1,
The guide cap
A chemical solution injection device inserted into a predetermined depth from the surface of the base body. According to claim 1,
The guide cap
It has an inclination so that the open area is reduced toward the sealing member,
A chemical solution injection device that covers one portion of the sealing member and exposes another portion to the outside.

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