Port connector and drug infusion device including the same

Abstract

The drug injection device according to the present invention includes a housing that includes a cover portion and a contact surface, with a mounting space formed between the cover portion and the contact surface; a drug storage portion disposed in the mounting space and storing a drug; a pump assembly that electrochemically generates positive and negative pressures and draws in and discharges a drug from the drug storage portion; a port connector disposed between the drug storage portion and the pump assembly, coupled to the drug storage portion and the pump assembly, providing a first flow path through which the drug drawn in from the drug storage portion to the pump assembly moves, and a second flow path through which the drug discharged from the pump assembly moves; and an insertion tube coupled to the port connector for injecting the drug into the user.

Description

Technical Field

[0001] The present invention relates to a port connector and a drug infusion device including the same.

Background Art

[0002] Drugs can be injected into the body in various ways such as oral, subcutaneous, and intravenous administration according to the type, treatment purpose, and method. A drug injector using a drug pump can automatically inject drugs into the body at a desired speed and dose at a desired time. Therefore, a drug injector using a drug pump is used in hospitals and the daily living environment of patients, and can be utilized in various forms.

[0003] Generally, an insulin pump, which is called an insulin injector, is for diabetic patients in whom insulin is not secreted or only a small amount is secreted, and it plays a role like the pancreas that regulates blood glucose by accurately supplying insulin from the outside into the body at a fixed time.

[0004] Such an insulin pump is used by insulin-dependent diabetic patients and can continuously inject drugs for 24 hours while attached to the patient. Thus, since an insulin injector must inject drugs periodically over a long period for diabetic patients, for the convenience of users, active technological development for miniaturization and automation of insulin injectors has been carried out.

[0005] Due to the development of technologies for miniaturization and automation of insulin injectors, the internal configuration can change, and every time a specific configuration changes, it is difficult in manufacturing to replace the entire configuration combined with it.

[0006] Therefore, a device that can flexibly cope with changes in a specific configuration is required.

Summary of the Invention

Problems to be Solved by the Invention

[0007] The technical objective of this invention is to provide a port connector that is coupled to a drug storage unit and a pump assembly in order to solve the aforementioned problems.

[0008] Furthermore, in order to solve the aforementioned problems, the technical objective of the present invention is to provide a drug infusion device comprising a drug storage unit, a pump assembly, and a port connector connected to an infusion assembly.

[0009] However, the technical problems that this embodiment aims to solve are not limited to those described above, and other technical problems may exist. [Means for solving the problem]

[0010] As a technical means for solving the above-mentioned technical problems, the port connector according to the present invention includes a main body coupled between the drug storage unit and the pump assembly, and a first flow path and a second flow path formed inside the main body through which the drug moves, wherein the first flow path is a flow path through which the drug moves from the drug storage unit toward the pump assembly, and the second flow path is a flow path through which the drug discharged from the pump assembly moves.

[0011] Furthermore, a drug injection device according to one embodiment of the present invention includes a housing that includes a cover portion and a contact surface, with a mounting space formed between the cover portion and the contact surface; a drug storage portion disposed in the mounting space and storing a drug; a pump assembly that electrochemically generates positive and negative pressures and inhales and discharges a drug from the drug storage portion; a port connector disposed between the drug storage portion and the pump assembly, coupled to the drug storage portion and the pump assembly, and providing a first flow path through which the drug inhaled from the drug storage portion to the pump assembly moves, and a second flow path through which the drug discharged from the pump assembly moves; and an insertion tube coupled to the port connector and injecting the drug into the user. [Effects of the Invention]

[0012] According to the means for solving the problems of the present invention described above, the versatility of the electroosmotic pump can be increased by using a port connector that acts as a medium for transferring drugs between the electroosmotic pump and other components. [Brief explanation of the drawing]

[0013] [Figure 1] This is a front perspective view of a drug infusion device according to one embodiment of the present invention. [Figure 2] This is a rear perspective view of a drug infusion device according to one embodiment of the present invention. [Figure 3] Figure 1 is a plan view of the inside of the enclosure. [Figure 4] Figure 3 is a plan view of the drug storage section. [Figure 5] Figure 3 is a plan view of the pump assembly shown. [Figure 6] Figure 5 is a block diagram that schematically shows the configuration of the pump assembly. [Figure 7] Figure 6 is a block diagram that schematically shows the configuration of the drive unit. [Figure 8] Figure 7 is an illustrative diagram illustrating the schematic operation of the drive unit. [Figure 9] Figure 3 is a perspective view showing the coupling structure of the drug storage unit, pump assembly, and port connector. [Figure 10] Figure 3 is a front perspective view of the port connector. [Figure 11] Figure 10 shows a cross-sectional view taken along the cutting line A-A'. [Figure 12] Figure 3 is a rear perspective view of the port connector. [Figure 13] Figure 12 shows a cross-sectional view taken along the cutting line B-B'. [Modes for carrying out the invention]

[0014] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can be embodied in various different forms and is not limited to the embodiments described herein. The accompanying drawings are merely for facilitating the understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the accompanying drawings. In the drawings, for the purpose of clearly explaining the present invention, parts not related to the explanation are omitted, and the sizes, forms, and shapes of the respective components shown in the drawings can be variously deformed. Throughout the specification, the same or similar parts are denoted by the same or similar reference numerals.

[0015] In the following description, the suffixes "assembly" and "part" for components are given or mixed for facilitating the preparation of the specification and do not have meanings or roles that distinguish them from each other. In the description of the embodiments disclosed in this specification, when it is determined that specific descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions thereof are omitted.

[0016] Throughout this specification, when a certain part is described as "connected (connected, contacted, or coupled)" to another part, this includes not only the case where it is "directly connected (connected, contacted, or coupled)", but also the case where it is "indirectly connected (connected, contacted, or coupled)" via other members therebetween. Also, when a certain part is described as "including (comprising or provided with)" a specific component, it does not exclude other components unless otherwise stated, and means that it can further "include (comprise or be provided with)" other components.

[0017] The ordinal numbers such as "first", "second", etc. used in this specification are merely attached to distinguish components from other components and do not limit the order or relationship of the components. For example, the first component of the present invention can be referred to as the second component, and similarly, the second component can also be referred to as the first component.

[0018] FIG. 1 is a front perspective view of a drug injection device according to an embodiment of the present invention, FIG. 2 is a rear perspective view of a drug injection device according to an embodiment of the present invention, and FIG. 3 is a plan view of the inside of the housing shown in FIG. 1.

[0019] Referring to FIGS. 1 to 3, a patch-type drug injection device

[100] according to an embodiment of the present invention will be described. The patch-type drug injection pump

[100] includes a housing

[110] and components disposed inside the housing

[110] .

[0020] The housing

[110] includes a cover portion

[111] and a contact surface

[112] , and a mounting space is formed between the cover portion

[111] and the contact surface

[112] . The cover portion

[111] has rounded corners, and the patch-type drug injection device

[100] can maintain a state of continuously adhering to the injection target without a sense of foreign matter. The contact surface

[112] is configured to adhere to the injection target, and a discharge port [112a] for pulling out an insertion tube to the outside is formed.

[0021] The mounting space is divided into a central region

[113] and first to third regions [114, 115, 116], and the first to third regions [114, 115, 116] are formed in a form surrounding the central region

[113] . In particular, the mounting space in the housing

[110] is divided into first to third regions [114, 115, 116] and a central region

[113] that expand in a direction perpendicular to the insertion direction of the insertion tube. Note that main components are coupled to each region. In the normal case, since the PCB circuit portion is disposed first over the entire plane or most of the device, and a drug storage portion, a pump, etc. are disposed on top of it, there is a problem that the thickness of the device is formed thick. However, the patch-type drug injection device

[100] of the present invention minimizes the regions where the components overlap each other in order to reduce the thickness.

[0022] The components include a drug storage unit 120, a pump assembly 130, a port connector 140, an injection assembly 150, and a circuit unit 160, which can be arranged in the aforementioned central region 113 and the first to third regions 114, 115, and 116. For example, the drug storage unit 120 may be placed in the first region 114, the pump assembly 130 and port connector 140 in the second region 115, the circuit unit 160 in the third region 116, and the injection assembly 150 in the central region 113, with the drug storage unit 120, pump assembly 130, port connector 140, and circuit unit 160 arranged in a manner that surrounds the injection assembly 150.

[0023] Figure 4 is a plan view of the drug storage section shown in Figure 3. As shown in Figure 4, the drug storage section 120 stores the drug to be injected, and its thickness changes according to the amount of drug to be injected. The drug storage section 120 can be provided in a flat pouch bag made of polymer material. Around the drug storage section 120, a sealing section 121 can be formed where both sides constituting the drug storage section 120 are joined by a predetermined width. The sealing section 121 can limit the expansion of the drug storage section 120 towards the periphery of the drug.

[0024] The drug storage section 120 can be made of a polymer film or the like, and the inside and outside of the drug storage section 120 are made of materials with different melting points, with the melting point of the internal material set lower than that of the external material. The drug storage section 120 is produced by applying heat at a predetermined temperature at which the internal material melts, forming a sealed section 121. When heat is applied to the sides of the sealed section 121, the internal materials adhere to each other and are sealed, and the bottom is folded into a W shape and heated. The internal materials adhere to each other, while the external materials do not adhere to each other, and are sealed in a wrinkled shape. Unlike conventional techniques, since the drug storage section 120 is made thin using a flexible material, the patch-type drug injection device 100 can be made even thinner and lighter.

[0025] Furthermore, a drug inlet / outlet 122 is connected to the drug storage unit 120, allowing drugs to flow into the drug storage unit 120 or drugs stored in the drug storage unit 120 to be discharged to the outside.

[0026] Figure 5 is a plan view of the pump assembly shown in Figure 3, Figure 6 is a schematic block diagram showing the configuration of the pump assembly shown in Figure 5, Figure 7 is a schematic block diagram showing the configuration of the drive unit shown in Figure 6, and Figure 8 is an illustrative diagram showing the schematic operation of the drive unit shown in Figure 7.

[0027] The pump assembly 130 will be described in detail with reference to Figures 5 to 8.

[0028] As shown in Figures 5 and 6, the pump assembly 130 is an electrochemically driven pump and includes a drive unit 131, a transfer chamber 132, an suction unit 133, and a discharge unit 134. The drive unit 131 is electrochemically driven by a control signal to generate positive and negative pressure, draw in a drug from the drug storage unit 120 and store it in the transfer chamber 132, and discharge the drug stored in the transfer chamber 132 to the injection assembly 150. The transfer chamber 132 contains the drug drawn in from the drug storage unit 120 by the drive unit 131. The suction unit 133 transfers the drug from the drug storage unit 120 to the transfer chamber 132, and the discharge unit 134 discharges the drug from the transfer chamber 132 into the insertion tube 151 of the injection assembly 150. Here, the drug is a drug to be injected into a specific patient, and insulin injected into a diabetic patient can be given as an example.

[0029] Referring to Figures 7 and 8, the drive unit 131 will be described in detail. The drive unit 131 is a pump that utilizes the movement of fluid due to the electroosmotic phenomenon that occurs when a voltage or current is applied to both ends of a pressure generating unit (membrane 131a) using electrodes. The drive unit 131 may include a membrane 131a, a power supply 131d that applies a voltage or current to a first electrode 131b and a second electrode 131c located on both sides of the membrane 131a, and a first diaphragm 131e and a second diaphragm 131f for the movement of the fluid. Each diaphragm 131e and 131f is provided on one side and the other side of the membrane 131a, and their shapes are deformed by the movement of the pumping solution as positive and negative pressure are alternately generated. Illustratively, the first diaphragm 131e and the second diaphragm 131f transmit the negative and positive pressure generated by the driving of the membrane 131a to the fluid to be transferred. More specifically, when negative pressure is generated, at least a portion of the first diaphragm 131e and the second diaphragm 131f are moved backward (when moved in the direction of circled number 1), and the fluid to be transferred is drawn into the transfer chamber 132. Conversely, when positive pressure is generated, at least a portion of the first diaphragm 131e and the second diaphragm 131f are moved forward (when moved in the direction of circled number 2), and the fluid to be transferred is discharged from the transfer chamber 132.

[0030] The membrane 131a is typically made of materials such as silica or glass, and when immersed in an aqueous solution, its surface becomes negatively charged. The membrane 131a has numerous fluid pathways, and when one of these is viewed under magnification, the surface of the negatively charged fluid pathway can be balanced by mobile cations with a positive charge that can move. In this state, applying a positive voltage to the first electrode 131b and a negative voltage to the second electrode 131c generates negative pressure, and this negative pressure moves the fluid inside the drive unit 131 in the direction of the circled number 1. At this time, the drug is inhaled through the inhalation passage 133b and flows into the transfer chamber 132 through the first check valve 133a. At this time, the second check valve 134a is closed to prevent negative pressure from being transmitted to the discharge passage 134b. Conversely, when a negative voltage is applied to the first electrode 131b and a positive voltage to the second electrode 131c, a reversible electrochemical reaction generates positive pressure in the opposite direction. This positive pressure causes the fluid inside the drive unit 131 to move in the direction of the circled number 2. At this time, the drug stored in the transfer chamber 132 is injected into the target body through the discharge passage 134b via the second check valve 134a. At this time, the first check valve 133a is blocked to prevent positive pressure from being transmitted to the inhalation passage 133b.

[0031] This phenomenon is called electroosmosis, and a pump that uses this principle is called an electroosmotic pump. The patch-type drug injection device 100 of the present invention uses a pump assembly 130 as a driving means, so it can be manufactured with a thin overall thickness and can adhere more stably to the skin.

[0032] Figure 9 is a perspective view showing the coupling structure of the drug storage unit, pump assembly, and port connector shown in Figure 3.

[0033] As shown in Figure 9, the port connector 140 is positioned between the drug storage unit 120 and the pump assembly 130, and is connected to both the drug storage unit 120 and the pump assembly 130. It provides a flow path for the drug flowing from the drug storage unit 120 into the pump assembly 130, and a flow path for the drug discharged from the pump assembly 130 into the insertion tube 151 of the injection assembly 150.

[0034] Figure 10 is a front perspective view of the port connector shown in Figure 3, and Figure 11 is a cross-section cut along the cutting line A-A' shown in Figure 10.

[0035] As shown in Figures 10 and 11, the port connector 140 is connected to the drug storage unit 120, the pump assembly 130, and the insertion tube 151 of the injection assembly 150, and includes a main body 141 in which a first flow path 142 and a second flow path 143 are formed.

[0036] The main body 141 may include a housing 141a, a partition wall 141b, and a support portion 141c. The housing 141a has a predetermined space formed inside, and the partition wall 141b is positioned inside the housing 141a, dividing the internal space of the housing 141a into a first space and a second space. A first flow path 142 is positioned in the first space, and a second flow path 143 is positioned in the second space. The ends of the housing 141a and the ends of the partition wall 141b may be formed to have a predetermined area for a sealed connection with the ends of the pump assembly 130.

[0037] The support portion 141c connects the housing 141a to the first flow path 142 or the second flow path 143, or connects the partition wall 141b to the first flow path 142 or the second flow path 143, thereby fixing the first flow path 142 and the second flow path 143.

[0038] The first channel 142 is a channel through which the drug moves from the drug storage unit 120 to the pump assembly 130, and the second channel 143 is a channel through which the drug moves from the pump assembly 130 to the insertion tube 151.

[0039] Here, the first channel 142 and the second channel 143 can be formed in a cylindrical shape, and the length of the first channel 142 can be made longer than the length of the second channel 143. The first channel 142 and the second channel 143 are formed inside the main body 141, parallel to each other, and the difference in length between the first channel 142 and the second channel 143 can result in a shape as shown in Figure 11. With this shape of the port connector 140, the drug injection device 100 of the present invention can maximize space utilization by positioning the injection assembly 150 that injects the drug into the user below the second channel 143 of the port connector 140, as shown in Figure 4, thereby minimizing the size and reducing inconvenience to the user.

[0040] The first flow path 142 is connected at one end to the drug storage unit 120 and at the other end to the pump assembly 130, and the second flow path 143 is connected at one end to the injection assembly 150 and at the other end to the pump assembly 130. Due to this connection structure, the main body 141 includes first to fourth coupling grooves 144, 145, 146, and 147. The first coupling groove 144 is formed on one side of the first flow path 142 and the drug inlet / outlet 122 of the drug storage unit 120 is inserted into and coupled to it, and the second coupling groove 145 is formed on the other side of the first flow path 142 and the suction part 133 of the pump assembly 130 is inserted into and coupled to it. A third coupling groove 146 is formed on one side of the second flow path 143, and the insertion tube 151 of the injection assembly 150 is coupled to it. A fourth coupling groove 147 is formed on the other side of the second flow path 143, and the discharge section 134 of the pump assembly 130 is inserted and coupled to it. Here, the third coupling groove 146 may further include a sealing member (not shown) that seals the coupling portion with the insertion tube 151.

[0041] Figure 12 is a rear perspective view of the port connector, and Figure 13 is a cross-sectional view taken along the cutting line B-B' shown in Figure 12.

[0042] As shown in Figures 12 and 13, the port connector 140 may further include a drug injection passage 148 in the main body 141. The drug injection passage 148 is formed in a direction intersecting the direction of travel of the first flow path 142, with one end communicating with the first flow path 142 and the other end open to the outside. The drug injection passage 148 is a passage through which a drug can be injected into the first flow path 142 using a drug injection syringe, and is used when filling the drug storage section 120 with a drug at the initial stage of operation of the drug injection device 100 of the present invention.

[0043] Thus, the port connector 140 acts as an intermediary for transferring drugs between the drug storage unit 120 and the pump assembly 130, and between the pump assembly 130 and the injection assembly 150, thereby increasing the versatility of the pump assembly 130. If the pump assembly 130, drug storage unit 120, and injection assembly 150 were directly connected, the structure of the pump assembly 130 would also have to be changed if the shape of the connection part of the drug storage unit 120 or the injection assembly 150 changed. However, by using the port connector 140 to maintain the structure of the pump assembly 130 and changing the connection part of the port connector 140 in accordance with the modified structure of the drug storage unit 120 and the injection assembly 150, the versatility of the pump assembly 130 can be expanded.

[0044] As shown in Figure 4, the injection assembly 150, including the insertion tube 151, can inject the drug discharged from the pump assembly 130 into the target of injection. The circuit section 160 can include electronic components necessary for driving and controlling the pump assembly 130 and a battery 161 for supplying power.

[0045] In addition, the additional configurations of the patch-type drug infusion device 100 will be described with reference to Figures 1 and 2.

[0046] As shown in Figure 1, the covering portion 111 of the housing 110 has a shooting hole 111a formed in the area corresponding to the area where the injection assembly 150 is located. The shooting hole 111a is a hole into which a shooting member of a shooting device (not shown) that pressurizes the injection assembly 150 so that the insertion tube 151 can be inserted into the injection target is inserted.

[0047] As shown in Figure 2, a drug injection hole 112b and an air vent hole 112c are formed on the contact surface 112 of the housing 110. The drug injection hole 112b is a hole for supplying drugs stored in the drug storage section 120 from the outside, and the air vent hole 112c is a hole for removing the pressure difference between the inside and outside of the housing 110. The drug injection hole 112b is formed at a position corresponding to the drug injection passage 148 formed in the port connector 140, and drugs can be injected through the drug injection hole 112b and the drug injection passage 148 using a syringe or the like.

[0048] The patch-type drug injection device 100 includes a sound output device (not shown) inside the housing 110, which can provide notification for specific situations. The circuit section 160 includes a sound output circuit section that can stop the operation of the sound output device (not shown), and a buzzer stop hole 112d can be formed in the contact surface 112, providing a passage for operating the sound output circuit section of the circuit section 160. Silicone caps can be attached to the outlet 112a and the drug injection hole 112b, and air vent stickers can be attached to the air vent hole 112c and the buzzer stop hole 112d.

[0049] A person with ordinary skill in the art to which the present invention pertains will understand, based on the above description, that the invention can be readily modified into other specific forms without altering the technical idea or essential features of the invention. Therefore, the embodiments described above should be understood to be illustrative and not limiting. The scope of this application is not defined by the above detailed description but by the claims described below, and all modifications or variations derived based on the meaning and scope of the claims and the concept of equivalents thereto should be interpreted as being included within the scope of this application.

[0050] The scope of this application is not defined by the detailed description above, but by the claims set forth below, and all modifications or variations derived based on the meaning and scope of the claims and the concept of equivalents thereof should be interpreted as being included within the scope of this application.

Claims

1. In a port connector that connects to the pump assembly and drug storage unit of a drug infusion device, A main body connected between the drug storage unit and the pump assembly, A first channel and a second channel are formed inside the main body through which the drug moves, Includes, The first flow path is a flow path through which the drug moves from the drug storage unit toward the pump assembly. The second flow path is a port connector, which is a flow path through which the drug discharged from the pump assembly travels.

2. The first channel and the second channel are formed side by side. The port connector according to claim 1, wherein the length of the second flow path is shorter than the length of the first flow path.

3. The aforementioned main body is A housing in which a predetermined space is formed, A partition wall is placed inside the housing and divides the space into a first space and a second space, Includes, The port connector according to claim 1, wherein the first flow path is located in the first space, and the second flow path is located in the second space.

4. The first and second channels are each formed in a cylindrical shape. The aforementioned main body is The port connector according to claim 3, further comprising a housing in which the first space and the second space are formed, and a support portion that connects the first flow path or the second flow path, or connects the partition wall with the first flow path or the second flow path.

5. The port connector according to claim 3, wherein the ends of the housing and the ends of the partition wall are formed to have a predetermined area for a sealed connection with the ends of the pump assembly.

6. The first flow path is, One end is connected to the drug storage unit, and the other end is connected to the pump assembly. The second flow path described above is The port connector according to claim 1, wherein one end is connected to an insertion tube for transporting the drug to the user, and the other end is connected to the pump assembly.

7. The aforementioned main body is A first coupling groove is formed on one side of the first flow path, into which the drug inlet / outlet of the drug storage section is inserted and coupled, A second coupling groove is formed on the other side of the first flow path, into which the suction portion of the pump assembly is inserted and coupled, The port connector according to claim 6, including the following:

8. The aforementioned main body is A third coupling groove is formed on one side of the second flow path, and the insertion tube is coupled to it, A fourth coupling groove is formed on the other side of the second flow path, into which the discharge section of the pump assembly is inserted and coupled, Includes, The port connector according to claim 6, further comprising a sealing member for sealing the connection portion with the insertion tube in the third coupling groove.

9. The aforementioned main body is The port connector according to claim 1, further comprising a drug injection channel formed in a direction intersecting the direction of travel of the first flow path.

10. The drug injection pathway is The port connector according to claim 9, wherein one side is connected to the first flow path and the other side is open to the outside of the main body.

11. The aforementioned main body is The port connector according to claim 10, further comprising a sealing member into which a drug injection syringe is inserted in the drug injection path.

12. In a drug infusion device, A housing including a cover portion and a contact surface, wherein a mounting space is formed between the cover portion and the contact surface, A drug storage unit is placed in the aforementioned implementation space and stores the drug, A pump assembly that generates positive and negative pressure electrochemically and inhales and discharges drugs from the drug storage section, A port connector is positioned between the drug storage unit and the pump assembly, and is connected to the drug storage unit and the pump assembly, providing a first flow path through which the drug drawn from the drug storage unit to the pump assembly moves, and a second flow path through which the drug discharged from the pump assembly moves. An insertion tube connected to the port connector for injecting the drug into the user, A drug injection device, including one.

13. The aforementioned port connector is The body includes the drug storage section, the pump assembly, and the insertion tube, and has the first flow path and the second flow path formed inside it. The first flow path is a flow path through which the drug moves from the drug storage unit to the pump assembly. The drug injection device according to claim 12, wherein the second flow path is a flow path through which the drug moves from the pump assembly to the injection assembly.

14. The first channel and the second channel are formed side by side. The drug infusion device according to claim 13, wherein the length of the second channel is shorter than the length of the first channel.

15. The aforementioned main body is A housing in which a predetermined space is formed, A partition wall is placed inside the housing and divides the space into a first space and a second space, Includes, The drug infusion device according to claim 13, wherein the first flow path is located in the first space and the second flow path is located in the second space.

16. The first and second channels are each formed in a cylindrical shape. The aforementioned main body is The drug injection device according to claim 15, further comprising a housing in which the first space and the second space are formed, and a support portion that connects the first flow path or the second flow path, or connects the partition wall with the first flow path or the second flow path.

17. The drug injection device according to claim 15, wherein the ends of the housing and the ends of the partition wall are formed to have a predetermined area for a sealed connection with the ends of the pump assembly.

18. The pump assembly is, A drive unit that electrochemically generates positive and negative pressure alternately, A transfer chamber frame is coupled to one side of the drive unit and has a transfer chamber formed inside to contain the drug, A suction section and a discharge section are coupled to one side of the transfer chamber frame and connected to the transfer chamber, A fluid transfer device according to claim 12, including the above.

19. The aforementioned main body is A first coupling groove is formed on one side of the first flow path, into which the drug inlet / outlet of the drug storage section is inserted and coupled, The drug injection device according to claim 18, further comprising a second coupling groove formed on the other side of the first flow path, into which the suction portion is inserted and coupled.

20. The aforementioned main body is A third coupling groove is formed on one side of the second flow path, and the insertion tube of the injection assembly is coupled to it, A fourth coupling groove is formed on the other side of the second flow path, into which the discharge portion is inserted and coupled, Includes, The drug injection device according to claim 19, further comprising a sealing member in the third coupling groove for sealing the coupling portion with the insertion tube.

21. The aforementioned main body is The drug injection device according to claim 13, further comprising a drug injection channel formed in a direction intersecting the direction of travel of the first flow path.

22. The drug injection pathway is The drug injection device according to claim 21, wherein one side is connected to the first flow path and the other side is open to the outside of the main body.

23. The aforementioned main body is The drug injection device according to claim 22, further comprising a sealing member into which a drug injection syringe is inserted in the drug injection passage.

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