Modular pressure transfer unit and drug delivery device comprising same

Abstract

A modular pressure transfer unit according to an embodiment of the present invention comprises: a housing forming a sealed inner space and having an interior filled with a fluid; a first elastic layer which is formed of an elastic material and coupled to the housing so as to transfer, toward the fluid, pressure applied from one side outside the housing; and a second elastic layer which is formed of an elastic material and coupled to the housing so as to transfer, toward the other side outside the housing, the pressure transmitted via the fluid.

Description

Modular pressure transmission unit and drug delivery device including the same

[0001] The present invention relates to a modular pressure transmission unit and a drug delivery device including the same, and more particularly, to a modular pressure transmission unit having a plurality of elastic layers and capable of transmitting pressure from one side to the other through a fluid filled therein, and a drug delivery device including the same.

[0002] Drug delivery devices are used to deliver drugs to the human body for various purposes, such as treating diseases, wounds, or for cosmetic purposes. The injection method using a needle is the most commonly used method due to its safety and efficiency.

[0003] However, although it is clear that drug delivery devices using needles inject the intended amount into the human body, it is not known whether the drug effectively reaches or reacts to the target target precisely because most of the target targets are microscopic and thin structures. In addition, they can cause patients to have injection phobia due to pain during injection, and there are also problems such as the risk of infection due to reuse of needles and the generation of a large amount of medical waste.

[0004] Accordingly, development of structures for delivering drugs into the human body without needles is ongoing.

[0005] The technical problem to be achieved by the present invention is to provide a modular pressure transmission unit having a plurality of elastic layers and capable of transmitting pressure from one side to the other through a fluid filled therein, and a drug delivery device including the same.

[0006] A modular pressure transmission unit according to an embodiment of the present invention may include a housing having a sealed internal space and filled with a fluid, a first elastic layer formed of an elastic material and coupled to the housing to transmit pressure applied from one side of the exterior of the housing to the fluid side, and a second elastic layer formed of an elastic material and coupled to the housing to transmit pressure transmitted through the fluid to the other side of the exterior of the housing.

[0007] According to an embodiment, the housing may include a first sub-housing in which the first elastic layer is formed and a second sub-housing in which the second elastic layer is formed.

[0008] According to an embodiment, the second sub-housing may include a support portion on which the second elastic layer is formed, an insert portion connected to the support portion and at least partially inserted into the interior of the first sub-housing, and a fixing portion connected to the insert portion and fixed by being caught by a fixing pin in a state in which the insert portion is maximally inserted into the interior of the first sub-housing.

[0009] According to an embodiment, a packing portion may be formed on the outer surface of the insert portion to seal the gap between the insert portion and the inner surface of the first sub-housing.

[0010] According to an embodiment, the fixing member may include an extension member connected to the insertion member and a protrusion member connected to the extension member and forming a catch for the fixing pin.

[0011] According to an embodiment, the first elastic layer may expand inwardly of the housing by pressure applied from outside the housing, and the second elastic layer may expand inwardly of the housing by pressure transmitted through the fluid.

[0012] According to an embodiment, the modular pressure transmission unit may further include an identification tag that stores identification information of the modular pressure transmission unit.

[0013] According to an embodiment, the first elastic layer may be formed in a plurality of areas on the upper surface of the housing.

[0014] According to an embodiment, the plurality of regions may be positioned symmetrically with respect to a center point of the upper surface of the housing.

[0015] A drug delivery device according to an embodiment of the present invention includes a drive unit, a modular pressure transmission unit coupled to the drive unit and transmitting pressure applied from the drive unit, and a nozzle unit coupled to the modular pressure transmission unit and using the pressure transmitted by the modular pressure transmission unit to spray a drug solution, wherein the modular pressure transmission unit may include a housing forming a sealed internal space and having an interior filled with a fluid, a first elastic layer formed of an elastic material and coupled to the housing and transmitting the pressure applied from the drive unit to the fluid side, and a second elastic layer formed of an elastic material and coupled to the housing and transmitting the pressure transmitted through the fluid to the drug solution inside the nozzle unit.

[0016] According to an embodiment, the driving unit may include a pressurizing portion that applies pressure to the first elastic layer and a driving device that controls the operation of the pressurizing portion.

[0017] According to an embodiment, the drug delivery device may further include a coupling detection device that detects a coupling state between the drive unit and the modular pressure transmission unit.

[0018] According to an embodiment, the combined sensing device can collect identification information of the combined modular pressure transmitting unit.

[0019] According to an embodiment, the driving device may receive the collected identification information when the modular pressure transmission unit is detected as being in a coupled state by the coupling detection device, and determine the total usage amount of the modular pressure transmission unit corresponding to the identification information.

[0020] According to an embodiment, the total usage of the modular pressure transmission unit may correspond to the accumulated value of pressure determined based on the number of times the first elastic layer is pressed by the pressurizing unit and the pressure during pressurization.

[0021] A device according to an embodiment of the present invention comprises a plurality of elastic layers and transmits pressure applied from the outside to the liquid side through a fluid filled therein, thereby enabling regular and stable control of the discharge amount and discharge speed of the liquid.

[0022] In addition, the device according to an embodiment of the present invention configures the structure for pressure transmission in a modular manner, thereby enabling partial replacement of the pressure transmission unit in the drug delivery device, thereby stably managing elastic layers for which durability management is important.

[0023] In addition, the device according to an embodiment of the present invention has the advantage of ensuring both ease of storage and efficiency of pressure transmission by storing the elastic layer on the liquid side in an unexpanded state before use and then, when in use, maintaining the elastic layer on the liquid side in an expanded state in the liquid side direction through a process of fixing a part of the device to a fixed pin.

[0024] In addition, the device according to an embodiment of the present invention can efficiently manage the replacement cycle of the modular pressure transmission device by managing the usage amount for each modular pressure transmission device after the point at which the modular pressure transmission device is combined.

[0025] In order to more fully understand the drawings cited in the detailed description of the present invention, a brief description of each drawing is provided.

[0026] Figure 1 is a conceptual diagram of a drug delivery device according to one embodiment of the present invention.

[0027] Figures 2 and 3 are drawings for explaining the operation process of the drug delivery device illustrated in Figure 1.

[0028] Figure 4 is a drawing showing detailed configurations of the drug delivery device illustrated in Figure 1.

[0029] FIG. 5 is a block diagram according to one embodiment of the driving device illustrated in FIG. 4.

[0030] Figures 6 and 7 are drawings showing the detailed structure of the modular pressure transmission unit illustrated in Figure 4.

[0031] Figures 8 and 9 are drawings showing the state of the modular pressure transmission unit illustrated in Figures 6 and 7 before and during use.

[0032] Figures 10 and 11 are drawings showing modified embodiments of the driving device illustrated in Figure 4.

[0033] The technical concept of the present invention is susceptible to various modifications and various embodiments. Specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the technical concept of the present invention to specific embodiments, and it should be understood that all modifications, equivalents, and alternatives fall within the scope of the technical concept of the present invention.

[0034] When explaining the technical concepts of the present invention, detailed descriptions of related known technologies will be omitted if they are deemed to unnecessarily obscure the gist of the present invention. Furthermore, numbers (e.g., "first," "second," etc.) used throughout the description of this specification are merely identifiers used to distinguish one component from another.

[0035] Additionally, in this specification, when a component is referred to as being “connected” or “connected” to another component, it should be understood that the component may be directly connected or connected to the other component, but may also be connected or connected via another component in between, unless there is a specific description to the contrary.

[0036] In addition, terms such as “~part”, “~device”, “~sub-subject”, and “~module” described in this specification mean a unit that processes at least one function or operation, which may be implemented by hardware such as a processor, a microprocessor, a microcontroller, a central processing unit (CPU), a graphics processing unit (GPU), an accelerate processor unit (APU), a drive signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a combination of hardware and software, and may also be implemented in a form combined with a memory that stores data necessary for processing at least one function or operation.

[0037] And it is to be clarified that the division of components in this specification is only a division based on the main function of each component. In other words, two or more components described below may be combined into one component, or one component may be further divided into two or more components with more detailed functions. In addition to its own main function, each component described below may additionally perform some or all of the functions of other components, and of course, some of the main functions of each component may be exclusively performed by other components.

[0038] Figure 1 is a conceptual diagram of a drug delivery device according to one embodiment of the present invention.

[0039] Referring to FIG. 1, the drug delivery device (10) may include a drive unit (110), a modular pressure transmission unit (120), a nozzle unit (160), and a drug storage unit (170).

[0040] The drive unit (110) may include a drive device (112) and a pressurizing portion (114) whose operation is controlled by the drive device (112).

[0041] The detailed structure and operation of the driving device (112) will be described later with reference to FIG. 5.

[0042] The pressurizing part (114) can perform vertical up-and-down reciprocating motion by the driving device (112).

[0043] According to an embodiment, the pressurizing member (114) may be positioned so that, in the initial state, the lower portion is in close contact with the first elastic layer (142) of the modular pressure transmission unit (120).

[0044] According to an embodiment, the pressurizing member (114) may be moved by the driving device (112) to apply pressure to the first elastic layer (142) of the modular pressure transmitting unit (120).

[0045] The modular pressure transmission unit (120) can be coupled with the drive unit (110) and can be detached as needed.

[0046] The modular pressure transmission unit (120) may include a housing (130), a first elastic layer (142), and a second elastic layer (152).

[0047] The housing (130) forms a sealed internal space, and the interior (INT1) can be filled with a fluid. For example, the fluid can be a liquid such as water, or a fluid in a gel state.

[0048] The first elastic layer (142) may be formed of an elastic material. The first elastic layer (142) is coupled to the housing (130) and can transmit pressure applied from the driving unit (110) to the fluid side inside the housing (130) (INT1).

[0049] The second elastic layer (152) may be formed of an elastic material. The second elastic layer (152) is coupled to the housing (130) and can transmit the pressure transmitted through the fluid filled inside the housing (INT1) to the liquid inside the nozzle unit (160) (INT2).

[0050] Depending on the embodiment, the first elastic layer (142) and the second elastic layer (152) may be formed of the same material having elasticity, or may be formed of different materials.

[0051] According to an embodiment, each of the first elastic layer (142) and the second elastic layer (152) may be formed of an elastic rubber material, a silicone material, or the like.

[0052] The nozzle unit (160) can be combined with the modular pressure transmission unit (120) and can be detached as needed.

[0053] The nozzle unit (160) can spray the chemical liquid supplied from the chemical liquid storage unit (170) through the nozzle (162) using the pressure transmitted by the modular pressure transmission unit (120).

[0054] According to an embodiment, the nozzle unit (160) can receive the liquid from the liquid storage unit (170) through the liquid passage (171).

[0055] According to an embodiment, in order to prevent the liquid from flowing back from the nozzle unit (160) to the liquid storage unit (170), a backflow prevention valve (171) may be provided inside the liquid passage (171) or at least at one of the two ends of the liquid passage (171).

[0056] According to an embodiment, the liquid supplied from the liquid storage unit (170) may be supplied to the interior (INT2) of the nozzle unit (160), so that the interior (INT2) of the nozzle unit (160) may be filled with the liquid.

[0057] According to an embodiment, a backflow prevention valve (not shown) may be provided in some areas of the nozzle (162) to prevent the liquid discharged through the nozzle (162) from flowing back into the nozzle unit (160).

[0058] Figures 2 and 3 are drawings for explaining the operation process of the drug delivery device illustrated in Figure 1.

[0059] Referring to FIGS. 1 to 3, FIG. 2 schematically illustrates a state when a drug is discharged from a drug delivery device (10), and FIG. 3 schematically illustrates a state restored to an initial state after a drug is discharged from a drug delivery device (10).

[0060] Referring to FIG. 2, the pressurizing unit (114) applies downward pressure to the first elastic layer (142) while being lowered vertically by the driving device (112). Since the interior (INT1) of the modular pressure transmission unit (120) is filled with fluid, the pressure applied to the fluid is transmitted to the second elastic layer (152) as the first elastic layer (142) expands in the inward direction of the housing (130). The second elastic layer (152) can expand in the outward direction of the housing (130) by the pressure transmitted through the fluid.

[0061] In Fig. 2, the lower surface of the pressurizing portion (114) and the first elastic layer (142) are depicted as not being in close contact, but in actual operation, the pressurizing portion (114) can apply pressure to the first elastic layer (142) with the lower surface in close contact with the first elastic layer (142).

[0062] Since the inside (INT2) of the nozzle part (160) is filled with the drug, as the second elastic layer (152) expands in the inward direction of the nozzle part (160), the drug is discharged through the nozzle (162) by the pressure transmitted by the second elastic layer (152).

[0063] Referring to FIG. 3, the pressurized portion (114) is raised vertically by the driving device (112), and the first elastic layer (142) is restored to the state before the pressure was applied, and the second elastic layer (152) is also restored to the state before the pressure was applied.

[0064] The drug delivery device (10) can rapidly repeat the states of FIGS. 2 and 3 and spray the drug solution in a jet form through the nozzle (162).

[0065] FIG. 4 is a drawing showing detailed configurations of the drug delivery device shown in FIG. 1. FIG. 5 is a block diagram according to an embodiment of the driving device shown in FIG. 4. FIGS. 6 and 7 are drawings showing detailed structures of the modular pressure transmission unit shown in FIG. 4. FIGS. 8 and 9 are drawings showing the state of the modular pressure transmission unit shown in FIGS. 6 and 7 before and during use. FIGS. 10 and 11 are drawings showing modified embodiments of the driving device shown in FIG. 4.

[0066] Referring to FIG. 4, the drug delivery device (10) may include a drive unit (110), a modular pressure delivery unit (120), a nozzle unit (160), and a drug storage unit (170).

[0067] The drive unit (110) may include a drive device (112), a pressurizing portion (114) whose operation is controlled by the drive device (112), a coupling detection device (116), and a display (117).

[0068] Referring to FIG. 5 together, the driving device (112) may include a power supply unit (112A), a driving unit (112B), a memory (112C), and a processor (112D).

[0069] The power supply unit (112A) can supply power to each component of the driving device (112).

[0070] Depending on the embodiment, the power supply unit (112A) may also supply power to components other than the driving device (112), such as the coupling detection device (116) and the display (117).

[0071] The driving unit (112B) can move the pressurizing unit (114) under the control of the processor (112D).

[0072] According to an embodiment, the driving unit (112B) can move the pressurizing unit (114) up and down in the vertical direction.

[0073] Depending on the embodiment, the driving unit (112B) can be implemented in various forms to move the pressurizing unit (114).

[0074] For example, the driving unit (112B) may include a motor and a configuration for converting the rotational motion of the motor into vertical motion.

[0075] For example, the driving unit (112B) may include a solenoid coil structure, in which case the pressurizing unit (114) may include a magnetic body that receives the force of the magnetic field formed by the solenoid coil.

[0076] The upper part of the pressurizing part (114) may be connected to the driving part (112B) of the driving device (112), or may be arranged in a position and structure that can receive the force applied by the driving part (112B).

[0077] The lower part of the pressurizing portion (114) is in close contact with the first elastic layer (142), and the pressurizing portion (114) can apply pressure to the first elastic layer (142) in the inward direction of the housing (130) of the modular pressure transmission unit (120).

[0078] The lower surface of the pressurizing portion (114) can be formed as a flat surface or a curved surface with a convex lower surface.

[0079] The memory (112C) can store data required for the processing of the processor (112D) to perform the operation and function of the driving device (112), and data generated during or after the processing of the processor (112D).

[0080] According to an embodiment, the memory (112C) may store a program including a program code for performing an operating method of a drug delivery device according to an embodiment of the present invention, and the memory (112C) may be coupled with a processor (112D) to execute the program.

[0081] The processor (112D) can perform data processing necessary for the operation and function of the driving device (112).

[0082] According to an embodiment, the processor (112D) can control the driving unit (112B).

[0083] Returning to FIG. 4, the coupling detection device (116) can detect the coupling state between the drive unit (110) and the modular pressure transmission unit (120).

[0084] According to an embodiment, the coupling detection device (116) can detect the coupling state with the driving unit (110) through a contact sensor (not shown) located at a portion connected or in contact with the driving unit (110).

[0085] According to an embodiment, the coupling detection device (116) may collect identification information of the coupled modular pressure transmission unit (120). For example, the coupling detection device (116) may collect identification information from an identification tag (146) of the modular pressure transmission unit (120). For example, the identification tag (146) may be implemented in a form capable of transmitting stored identification information wirelessly (e.g., an NFC tag).

[0086] The coupling detection device (116) can transmit information about the coupling status (whether coupling is established) with the drive unit (110) or identification information of the coupled modular pressure transmission unit (120) to the drive unit (112).

[0087] According to an embodiment, information about the coupling status with the drive unit (110) collected by the coupling detection device (116) or identification information of the coupled modular pressure transmission unit (120) may be displayed through the display (117).

[0088] The processor (112D) of the driving device (112) can determine the usage amount of the modular pressure transmission unit (120) based on the combination status with the unit (110) transmitted from the combination detection device (116) or the identification information of the combined modular pressure transmission unit (120).

[0089] According to an embodiment, when the processor (112D) detects that the modular pressure transmission unit (120) is coupled with the drive unit (110), it can determine the usage amount of the modular energy transmission unit (120) corresponding to the collected identification information. In this case, the usage amount can correspond to the cumulative value of the pressure determined based on the number of times the first elastic layer (142) is pressed by the pressurizing unit (114) and the pressure during the pressurizing.

[0090] For example, the amount of use may correspond to the cumulative value of the pressure applied each time the first elastic layer (142) of the pressurizing portion (114) is pressed, and the amount of use may be displayed through the display (117).

[0091] According to an embodiment, the processor (112D) can determine whether the usage of the currently used modular pressure transmission unit (120) exceeds a reference value, and can display the determination result through the display (117). In this case, the reference value may correspond to a replacement cycle according to the durability of the modular pressure transmission unit (120).

[0092] The modular pressure transmission unit (120) may include a housing (130), a first elastic layer (142), and a second elastic layer (152).

[0093] The housing (130) forms a sealed internal space, and the interior (INT1) can be filled with a fluid.

[0094] According to an embodiment, the housing (130) may include a first sub-housing (140) in which a first elastic layer (142) is formed and a second sub-housing (150) in which a second elastic layer (152) is formed.

[0095] Referring to FIGS. 6 and 7 together, FIG. 6 shows a side view of the first sub-housing (140) and the second sub-housing (150) separated, and FIG. 7 shows a view of the second sub-housing (150) viewed from below.

[0096] A first elastic layer (142) may be bonded to at least a portion (e.g., the upper surface) of the first sub-housing (140).

[0097] A portion (e.g., the upper surface) of the first sub-housing (140) may include an identification tag (146) of the modular pressure transmission unit (120).

[0098] A fixing pin (144) may be formed on the inner surface of the first sub-housing (140). The fixing pin (144) may fix the first sub-housing (140) in a state where the insertion portion (150B) of the second sub-housing (150) is inserted to the maximum extent into the interior of the first sub-housing (140).

[0099] The second sub-housing (150) may include a support portion (150A), an insert portion (150B), and a fixing portion (150C).

[0100] A second elastic layer (152) may be formed inside the support member (150A). The second elastic layer (152) may partition the fluid filled inside the housing (130) of the modular pressure transmission unit (120) (INT1) and the liquid filled inside the nozzle unit (160) (INT2).

[0101] The support member (150A) may include fastening units (153-1, 153-2) for fastening the second elastic layer (152) to the support member (150A).

[0102] The insertion portion (150B) is connected to the support portion (150A) and can be inserted at least partially into the interior of the first sub-housing (140).

[0103] A packing portion (154) may be formed on the outer surface of the insert portion (150B) to close the gap between the insert portion (150B) and the inner surface of the first sub-housing (140).

[0104] According to an embodiment, the packing portion (154) may be composed of at least one O-ring.

[0105] The fixed part (150C) is connected to the insertion part (150B), so that the insertion part (150B) can be caught on the fixing pin (144) while being inserted to the maximum extent into the interior of the first sub-housing (140), and can be fixed by the fixing pin (144) while being inserted to the maximum extent.

[0106] According to an embodiment, the fixed portion (150C) may include an extension portion (155) connected to the insertion portion (150B), and a protrusion (156) connected to the extension portion (155) and forming a catch on which the fixed pin (144) is caught.

[0107] According to an embodiment, the diameter of the extension (155) may be configured to be smaller than the diameter of the protrusion (156).

[0108] A through hole (150-TH) is formed along a vertical dotted line in FIG. 6 in the interior of the support portion (150A), insert portion (150B), and fixing portion (150C) of the second sub-housing (150), and the through hole (150-TH) may be partitioned by a second elastic layer (152) included in the interior of the support portion (150A).

[0109] Referring to FIGS. 8 and 9 together, FIG. 8 shows the state before use of the modular pressure transmission unit (120), and FIG. 9 shows the state when the modular pressure transmission unit (130) is in use.

[0110] Referring to Fig. 8, before using the modular pressure transmission unit (120), the insertion portion (150B) of the second sub-housing (150) is not fully inserted, and the protrusion (156) of the fixing portion (150A) is not caught on the fixing pin (144). At this time, the interior of the modular pressure transmission unit (130) can be filled with a fluid (e.g., water).

[0111] Referring to FIG. 9, when using the modular pressure transmission unit (120), before combining the modular pressure transmission unit (130) with the drive unit (110) and the nozzle unit (130), the user can push up the support part (150) of the modular pressure transmission unit (120) to change the state so that the protrusion (156) of the fixing part (150A) is caught on the fixing pin (144).

[0112] Accordingly, the second elastic layer (152) can be expanded convexly downward by the fluid filled inside the modular pressure transmission unit (130). When no pressure is applied from the outside of the modular pressure transmission unit (130), the second elastic layer (152) is expanded, and when pressure is applied from the outside, it can further expand downward and push out the liquid filled inside (INT2) of the nozzle unit (160). In this case, the second elastic layer (152) can more effectively transfer the pressure transmitted from the outside to the liquid side.

[0113] Referring to FIGS. 10 and 11 together, FIG. 10 is a side view of a modular pressure transmission unit to which another embodiment (142') of the first elastic layer is applied, and FIG. 11 is a view showing a first sub-housing (140) to which another embodiment (142') of the first elastic layer is applied, as viewed from above.

[0114] The first elastic layer (142') may be formed in a plurality of regions on the upper surface of the housing (e.g., the first sub-housing (140)). According to an embodiment, the plurality of regions may be positioned at positions symmetrical to each other with respect to the center point (CNT) of the upper surface of the housing (e.g., the first sub-housing (140)).

[0115] According to an embodiment, the plurality of regions may be formed as an even number of regions that are symmetrical to each other with respect to the center point (CNT) of the upper surface of the first sub-housing (140).

[0116] In this case, the number of pressurizing parts (114) of the driving unit (110) may be the same as the number of the plurality of regions.

[0117] Above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications and changes can be made by a person having ordinary skill in the art within the technical spirit and scope of the present invention.

Claims

1. A housing that forms a sealed internal space and is filled with fluid; A first elastic layer formed of an elastic material and coupled to the housing to transmit pressure applied from one side of the outside of the housing to the fluid side; and A modular pressure transmission unit comprising a second elastic layer formed of an elastic material and coupled to the housing to transmit pressure transmitted through the fluid to the other side outside the housing.

2. In paragraph 1, The above housing, A first sub-housing in which the first elastic layer is formed; and A modular pressure transmission unit comprising a second sub-housing in which the second elastic layer is formed.

3. In paragraph 2, The second sub-housing is, A support portion on which the second elastic layer is formed; An insertion portion connected to the support portion and at least partially inserted into the interior of the first sub-housing; and A modular pressure transmission unit, comprising a fixing part connected to the insertion part and fixed by being caught on a fixing pin while the insertion part is maximally inserted into the interior of the first sub-housing.

4. In paragraph 3, On the outer surface of the above insertion part, A modular pressure transmission unit, in which a packing portion is formed to seal the gap between the insert portion and the inner surface of the first sub-housing.

5. In paragraph 3, The above fixed part, an extension connected to the above insert; and A modular pressure transmission unit, comprising a protrusion connected to the extension and forming a catch for the fixing pin.

6. In paragraph 1, The first elastic layer expands inwardly of the housing due to pressure applied from outside the housing, A modular pressure transmission unit in which the second elastic layer expands outwardly of the housing by pressure transmitted through the fluid.

7. In paragraph 1, The above modular pressure transmission unit, A modular pressure transmission unit further comprising an identification tag storing identification information of the modular pressure transmission unit.

8. In paragraph 1, The above first elastic layer is, A modular pressure transmission unit formed in multiple areas on the upper surface of the housing.

9. In paragraph 8, The above multiple areas are, Modular pressure transmission units positioned symmetrically with respect to the center point of the upper surface of the housing.

10. Drive unit; A modular pressure transmission unit coupled to the above driving unit and transmitting the pressure applied from the driving unit; and It is combined with the above modular pressure transmission unit and includes a nozzle unit that sprays a liquid using the pressure transmitted by the above modular pressure transmission unit. The above modular pressure transmission unit, A housing having a sealed internal space, the interior of which is filled with fluid; A first elastic layer formed of an elastic material and coupled to the housing to transmit pressure applied from the driving unit to the fluid side; and A drug delivery device comprising a second elastic layer formed of an elastic material and coupled to the housing to transmit pressure transmitted through the fluid to a drug solution inside the nozzle unit.

11. In paragraph 10, The above drive unit, A pressurizing portion that applies pressure to the first elastic layer; and A drug delivery device comprising a driving device that controls the operation of the pressurizing portion.

12. In paragraph 11, The above drug delivery device, A drug delivery device further comprising a coupling detection device that detects a coupling state between the driving unit and the modular pressure transmission unit.

13. In paragraph 12, The above combination detection device, A drug delivery device that collects identification information of the combined modular pressure transmission unit.

14. In paragraph 13, The above driving device is, A drug delivery device that receives the collected identification information when the modular pressure transmission unit is detected as being in a combined state by the combined detection device and determines the total usage amount of the modular pressure transmission unit corresponding to the identification information.

15. In paragraph 14, The total usage of the above modular pressure transmission unit is: A drug delivery device corresponding to the cumulative value of pressure determined based on the number of times the first elastic layer is pressed by the pressurizing unit and the pressure during pressurization.

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