Elastic membrane for transmitting pressure, and needleless syringe using same

Abstract

An elastic membrane for transmitting driving pressure of a needleless syringe, and the needleless syringe using same are disclosed. The elastic membrane (500) for transmitting pressure comprises: a body (510) which has elasticity, and which is provided between a driving chamber (402) and a driven chamber (202) so as to partition the driving chamber (402) from the driven chamber (202) in a sealed state; a driven protrusion part (520) in which a pressure-side cavity (522) opened to the driving chamber (402) is formed, and which protrudes from the central portion of the body (510) toward the driven chamber (202); and a driving protrusion part (530) which is spaced a predetermined distance from the edge of the body (510) and which protrudes toward the driving chamber (402), wherein, when a pressure (F) is applied from the driving chamber (402) such that the driving protrusion part (530) is pressed toward the driven chamber (202), the edge of the body (510) facing the driven chamber (202) becomes a hinge point (H), and thus the driven protrusion part (520) transmits the pressure while deformed toward the driven chamber (202).

Description

Elastic membrane for pressure transmission and needleless syringe using the same

[0001] The present invention relates to a membrane and a needleless syringe using the same, and more specifically, to an elastic membrane for transmitting driving pressure of a needleless syringe and a needleless syringe using the same.

[0002] Generally, drug injections are performed using oil-needle syringes. The injection method using oil-needle syringes has various problems, such as cross-contamination between recipients, injection-related pain, and the possibility of the needle breaking or detaching during the injection process.

[0003] To address the problems associated with needle-containing syringes, injection methods using needleless syringes are being developed recently. A needleless syringe typically refers to a device that injects high-pressure liquid medication into the skin of humans or animals.

[0004] Conventional needleless syringes utilize external power, such as energy from an external gas supply source, to obtain sufficient energy to inject a drug solution through the skin. Conventional needleless syringes have the disadvantage of being large in size and having a complex structure because they must be equipped with a separate gas supply device. In addition, conventional needleless syringes have the problem that some of the drug solution cannot be injected because sufficient pressure is not generated to inject the drug solution.

[0005] Therefore, a technology capable of effectively transmitting pressure applied to the drug solution is required.

[0006] [Prior Art Literature]

[0007] (Patent Document 1) Republic of Korea Published Patent No. 10-2012-0103859 (September 20, 2012)

[0008] The objective of the present invention is to provide an elastic membrane for pressure transmission capable of effectively transmitting pressure applied to a drug solution, and a needleless syringe using the same.

[0009] To achieve the above objective, the present invention provides an elastic membrane for pressure transmission comprising: a body having elasticity and installed between a driving chamber and a driven chamber to partition the driving chamber and the driven chamber in a sealed state; a driven protrusion having a pressurized cavity formed inside that is open to the driving chamber and protruding from the central part of the body into the driven chamber; and a driving protrusion protruding into the driving chamber at a certain distance from the edge of the body; wherein when pressure (F) is applied in the driving chamber and the driving protrusion is pressed in the direction of the driven chamber, the edge of the body in the direction of the driven chamber becomes a hinge point (H), and the driven protrusion is deformed in the direction of the driven chamber to transmit pressure.

[0010] Preferably, the passive protrusion is formed to protrude in a cylindrical shape, and the driving protrusion has a band shape with a semicircular cross-section. The pressurized cavity may have a honeycomb structure in cross-section.

[0011] Preferably, the body is formed with a predetermined thickness, and a plurality of deformation portions are formed along the circumference in contact with the driving chamber.

[0012] Preferably, the deformation portion is formed at a certain distance from the pressurized cavity.

[0013] Preferably, the deformation portion is formed by forming deformation grooves of a predetermined depth in the body. The deformation grooves may all be formed to the same depth.

[0014] Preferably, the deformation groove is formed such that its depth gradually decreases from the center of the body toward the edge.

[0015] Preferably, the deformation part is formed by cutting the body through a deformation hole.

[0016] Preferably, the width of the deformation portion gradually increases from the center of the body toward the edge.

[0017] Preferably, the width of the deformation portion gradually decreases from the center of the body toward the edge.

[0018] In addition, the present invention provides a needleless syringe comprising: a casing; a nozzle portion formed to spray the liquid, having a storage space portion in which a liquid to be injected is stored; a liquid filling portion in which the liquid supplied to the nozzle portion is located; a cylinder portion installed between the casing and the nozzle portion to change the pressure of the nozzle portion; a membrane described above having elasticity and deformed by the cylinder portion to supply the liquid from the liquid filling portion to the nozzle portion or to spray the liquid supplied to the nozzle portion; and an injection driving portion installed in the casing to operate the cylinder portion.

[0019] Preferably, an installation space is formed inside the casing, and the injection drive unit is installed in the installation space.

[0020] Preferably, the nozzle portion comprises a nozzle body having a storage space formed therein, a nozzle hole formed in the nozzle body to communicate with the storage space, and a nozzle fixing portion for fixing the nozzle body to the cylinder portion.

[0021] Preferably, the storage space is formed such that the upper portion adjacent to the cylinder portion has the same diameter, and the diameter gradually decreases toward the lower portion where the liquid medicine is sprayed.

[0022] Preferably, the nozzle hole is connected to the lower part of the storage space and is formed with a diameter of 0.001 to 0.1 times the diameter of the upper part of the storage space.

[0023] Preferably, the nozzle fixing part comprises a nozzle fixing hole formed in the cylinder part, a nozzle mounting hole formed in the nozzle body to correspond to the nozzle fixing hole, and a nozzle fixing post fastened to the nozzle fixing hole through the nozzle mounting hole located in a straight line.

[0024] Preferably, the liquid filling section comprises a liquid transfer path communicating internally, a liquid filling body in which the liquid filling path is formed, a liquid filling valve operated by the cylinder section to open and close the liquid transfer path, a liquid supply path formed in the nozzle body to communicate with the liquid transfer path and the storage space section, and a filling packing that seals the space between the liquid filling body and the nozzle body. Here, the liquid transfer path comprises a first liquid transfer path communicating with the liquid filling path, and a second liquid transfer path formed with a larger diameter than the first liquid transfer path and communicating with the liquid supply path.

[0025] Additionally, a storage portion in which the liquid is stored is formed to be detachably attached to the liquid filling path of the liquid filling body. Furthermore, the liquid filling valve includes a check ball positioned in the second liquid transfer path to close the first liquid transfer path, and a check ball spring that presses the check ball in the direction of the first liquid transfer path.

[0026] Here, when the membrane is deformed upward by the cylinder part and the pressure in the storage space part is lowered, the check ball compresses the check ball spring, and as the first liquid transfer path is opened, a certain amount of liquid is supplied to the storage space part. When the membrane is deformed downward by the cylinder part and the pressure in the storage space part is increased, the check ball closes the first liquid transfer path by the check ball spring, and at the same time, the liquid in the storage space part is sprayed through the nozzle hole.

[0027] Preferably, the cylinder part comprises: a cylinder body formed inside a cylinder space filled with a fluid or gas capable of transmitting pressure; a piston installed to be movable along the cylinder space and installed to apply pressure to a driving protrusion of a membrane; and a cylinder spring for pressurizing the piston in the direction of the injection driving part.

[0028] Preferably, a filling port is further included in the central part of the piston so that when the piston moves, material in the cylinder space enters and exits, thereby improving pressure loss and pressure transmission power. In this case, when the piston is pressurized in the direction of the nozzle by the injection drive unit, the internal pressure that is initially increased instantaneously by the filling port is relieved to prevent damage to the membrane.

[0029] Preferably, the injection driving unit is either a piezoelectric element or a solenoid.

[0030] The elastic membrane for pressure transmission according to the present invention and the needleless syringe using the same can effectively transmit pressure applied to a drug solution.

[0031]

[0032] FIG. 1 is a drawing showing a membrane according to one embodiment of the present invention.

[0033] FIG. 2 is a drawing for explaining the operating state of a membrane according to an embodiment of the present invention.

[0034] FIG. 3 is a drawing showing a membrane according to another embodiment of the present invention.

[0035] FIG. 4 is a drawing showing a membrane according to another embodiment of the present invention.

[0036] FIG. 5 is a drawing showing a membrane according to another embodiment of the present invention.

[0037] FIG. 6 is a drawing showing a needleless syringe according to one embodiment of the present invention.

[0038] FIGS. 7 and 8 are drawings for explaining the internal structure and operating state of a needleless syringe according to one embodiment of the present invention.

[0039] FIG. 9 is a drawing showing an internal pressure maintaining part of a needleless syringe according to one embodiment of the present invention.

[0040] The present invention will be described in detail below with reference to the attached drawings.

[0041] FIG. 1 is a drawing showing a membrane according to one embodiment of the present invention, FIG. 2 is a drawing for explaining the operating state of a membrane according to one embodiment of the present invention, FIG. 3 is a drawing showing a membrane according to another embodiment of the present invention, FIG. 4 is a drawing showing a membrane according to yet another embodiment of the present invention, and FIG. 5 is a drawing showing a membrane according to yet another embodiment of the present invention.

[0042] As illustrated in FIG. 1, the elastic membrane (500) for pressure transmission according to the present invention comprises a body (510, body), a driven protrusion (520, driven protrusion), and a driving protrusion (530, driving protrusion).

[0043] The above body (510) has elasticity and is installed between the driving chamber (402) and the driven chamber (202), thereby partitioning the driving chamber (402) and the driven chamber (202) in a sealed state (see FIG. 7).

[0044] A pressure-side cavity (522) is formed inside the above-mentioned passive protrusion (520) and is open to the driving chamber (402), and the above-mentioned passive protrusion (520) protrudes into the passive chamber (202) from the central part of the body (510).

[0045] The above driving protrusion (530) protrudes into the driving chamber (402) at a certain distance from the edge of the body (510).

[0046] Looking at the operation of the elastic membrane (500) for pressure transmission, as shown in FIG. 2, when pressure (F) is applied in the driving chamber (402) and the driving protrusion (530) is pressed toward the driven chamber (202), the edge of the body (510) toward the driven chamber (202) becomes a hinge point (H), and the driven protrusion (520) is deformed toward the driven chamber (202) to transmit pressure.

[0047] In other words, when the driving protrusion (530) is momentarily pressed toward the passive chamber (202) by pressure (F), the travel distance (b) of the passive protrusion (520) is greater than the travel distance (a) of the driving protrusion (530) relative to the hinge point (H) due to the lever principle, so the pressure is concentrated toward the center and transmitted to the passive chamber (202).

[0048] The driving protrusion (530) has a semicircular cross-section and is formed in a band shape, so that it can be easily pressed and pushed by pressure or a pressure surface applied from the driving chamber (402). The driven protrusion (520) is formed protruding from the body (510) in a cylindrical shape, so that it can concentrate and transmit pressure in the direction of the driven chamber (202).

[0049] Preferably, the pressurized cavity (522) may have a honeycomb (hexagonal) cross-section (see FIG. 3), and improve the straightness of the fluid or gas pressurized in the driving chamber (402), thereby improving the pressurization performance of the passive protrusion (520).

[0050] As illustrated in FIG. 3, the body (510) may be formed with a predetermined thickness, and a plurality of deformation portions (540) may be formed along the circumference in contact with the driving chamber (402).

[0051] The above deformation part (540) is formed at a certain distance from the pressure-side cavity (522), so that even if the passive protrusion (520) moves as the deformation part (540) is deformed by pressure (F), the pressure-side cavity (522) can be prevented from being damaged.

[0052] In addition, since each deformed portion (540) can be quickly restored to its original state, the elastic membrane (500) for pressure transmission can be quickly restored to its original shape.

[0053] For example, the deformation part (540) can be formed by forming a deformation groove (542) of a predetermined depth in the body (510). The deformation grooves (542) can all be formed with the same depth.

[0054] If the above deformation grooves (542) are formed with the same depth, the thin part of the body (510) is prevented from being damaged by the instantaneously applied pressure (F), and the shape can be maintained more stably.

[0055] In another embodiment of the present invention, the deformation groove (542) is formed such that its depth gradually decreases from the center of the body (510) toward the edge (last drawing of FIG. 7). In this case, since the amount of deformation of the passive protrusion (520) is relatively large, a large amount of deformation of the passive protrusion (520) is induced. However, a material must be selected and used so that the passive protrusion (520) is not damaged by the large amount of deformation.

[0056] As illustrated in FIG. 4, the deformation portion (540) of another embodiment is formed by cutting the body (510) by the deformation hole (542'). In this case, the amount of deformation of the body (510) can be increased by the pressure (F) applied instantaneously.

[0057] Additionally, as illustrated in FIG. 5, the deformation portion (540) of another embodiment has a gradually increasing width from the center of the body (510) toward the edge. In this case, when pressure (F) is applied, a space is secured for the body (510) to deform, and when the pressure (F) is released, the protruding passive protrusion (520) is quickly returned to its original state, allowing for quick preparation for the next applied pressure.

[0058] In another embodiment, the deformation portion (540) has a gradually decreasing width from the center of the body (510) toward the edge. In this case, the amount of deformation in the center of the body (510) where the passive protrusion (520) is formed is increased, thereby increasing the pressure transmitted to the passive chamber (202).

[0059] The deformation portion (540) of the above-described embodiments is formed by a deformation groove (542) or a deformation hole (542').

[0060] FIG. 6 is a drawing showing a needleless syringe according to one embodiment of the present invention, FIG. 7 and 8 are drawings for explaining the internal structure and operating state of a needleless syringe according to one embodiment of the present invention, and FIG. 9 is a drawing showing an internal pressure maintaining part of a needleless syringe according to one embodiment of the present invention.

[0061] As illustrated in FIGS. 6 to 8, a needleless syringe (10) using an elastic membrane (500) for pressure transmission comprises a casing (100), a nozzle part (200), a liquid filling part (300), a cylinder part (400), a membrane (500), and an injection driving part (600). The configuration of such a needleless syringe (10) is disclosed in the applicant's international patent application PCT / KR2025 / 013987, the contents of which are incorporated herein by reference.

[0062] Since the driving chamber (402) corresponds to the cylinder space of the needleless syringe (10) and the passive chamber (202) corresponds to the storage space of the needleless syringe (10), the driving chamber (402) is subsequently referred to as the cylinder space (402) and the passive chamber (202) as the storage space (202).

[0063] The above casing (100) is a part that the user grips, and protrusions and indentations may be formed for easy gripping.

[0064] And the nozzle part (200) has a storage space part (passive chamber, 202) in which a drug solution to be injected is stored, and is formed so that the drug solution is sprayed.

[0065] The liquid filling section (300) is where the liquid supplied to the nozzle section (200) is located.

[0066] The above cylinder part (400) is installed between the casing (100) and the nozzle part (200) to change the pressure of the nozzle part (200) and simultaneously pressurize the membrane (500).

[0067] The membrane (500) has elasticity and is deformed by the cylinder part (400) to supply the liquid from the liquid filling part (300) to the nozzle part (200) or to spray the liquid supplied to the nozzle part (200).

[0068] The injection drive unit (600) is installed in the casing (100) to operate the cylinder unit (400). The injection drive unit (600) may be composed of compressed gas, a laser, a spring, a voice coil, a piezoelectric element, a solenoid, etc.

[0069] When looking at the operation of such a needleless syringe (10), a storage unit (20), such as a syringe or a medicine bottle containing medicine liquid, is installed in the medicine liquid filling unit (300), and the cylinder unit (400) is operated by the injection driving unit (600).

[0070] When the pressure of the storage space (202) is lowered by this cylinder part (400), the liquid from the liquid filling part (300) is supplied to the storage space (202); conversely, when the pressure of the storage space (202) is raised by the cylinder part (400) and the membrane (500) is pressurized, the liquid supplied to the storage space (202) is sprayed outward and injected into the target object.

[0071] As illustrated in FIGS. 7 and 8, an installation space is formed inside the casing (100), and an injection drive unit (600) is installed in the installation space.

[0072] The nozzle part (200) includes a nozzle body (210), a nozzle hole (220), and a nozzle fixing part (230). A storage space part (202), which is a passive chamber, is formed inside the nozzle body (210). Additionally, the nozzle hole (220) is formed in the nozzle body (210) so as to be in communication with the storage space part (202).

[0073] The nozzle fixing part (230) is for fixing the nozzle body (210) to the cylinder part (400), and the nozzle body (210) can be separated for internal cleaning or replacement repair. It is preferable to separate the nozzle part (200) after use and replace it with a new nozzle part (200) considering infection, etc. (single-use).

[0074] The storage space (202) is formed such that the upper part adjacent to the cylinder part (400) has the same diameter, and the diameter gradually decreases toward the lower part where the liquid medicine is sprayed.

[0075] The nozzle hole (220) is connected to the lower part of the storage space (202), and the diameter of the nozzle hole (220) is formed to be 0.001 to 0.1 times the diameter of the upper part of the storage space (202), for example, 0.02 times. If the diameter of the upper part of the storage space (202) is 10 mm, the diameter of the nozzle hole (220) is formed to be 0.2 mm, and the diameter of the nozzle hole (220) changes according to the diameter of the upper part of the storage space (202). Accordingly, when the pressure of the storage space (202) is lowered by the cylinder part (400), the liquid filling part (300) is opened first, thereby preventing air from entering the nozzle hole (220).

[0076] Additionally, the nozzle fixing part (230) includes a nozzle fixing hole (232), a nozzle installation hole (234), and a nozzle fixing post (236). The nozzle fixing hole (232) is formed in the cylinder part (400). The nozzle installation hole (234) is formed in the nozzle body (210) to correspond to the nozzle fixing hole (232). The nozzle fixing post (236) is fixed to the nozzle fixing hole (232) through the nozzle installation hole (234) located in a straight line. The embodiment of the nozzle fixing part (230) can be any method that can fix the nozzle body (210) to the cylinder part (400), such as a screw connection method or an interference fit method, and it is preferable to use a configuration that allows for simple attachment and detachment for hygiene purposes. Multiple such nozzle fixing parts (230) may be formed.

[0077] The liquid filling section (300) includes a liquid filling body (310), a liquid filling valve (320), a liquid supply path (330), a filling fixing section, and a filling packing (350). A liquid transfer path (302) and a liquid filling path (304) are formed in communication within the liquid filling body (310). The liquid filling valve (320) is operated by a cylinder section (400) and opens and closes the liquid transfer path (302). The liquid supply path (330) is formed in the nozzle body (210) to communicate with the liquid transfer path (302) and the storage space section (202). The filling fixing section (not shown) is fixed to the liquid filling body (310) by means of a plurality of bolts. The filling packing (350) seals the space between the liquid filling body (310) and the nozzle body (210) to prevent leakage of the liquid.

[0078] Here, the liquid transfer path (302) includes a first liquid transfer path (302a) and a second liquid transfer path (302b). The first liquid transfer path (302a) is connected to the liquid filling path (304). The second liquid transfer path (302b) is formed with a larger diameter than the first liquid transfer path (302a) and is connected to the liquid supply path (330).

[0079] A storage unit (20) in which a drug solution is stored is detachably attached to the drug solution filling channel (304) of the drug solution filling body (310). The storage unit (20) is used to hold the drug solution, such as a syringe, a drug bottle, or a drug solution tank.

[0080] Additionally, the liquid filling valve (320) includes a check ball (322) and a check ball spring (324). The check ball (322) is positioned in the second liquid transfer path (302b) to close the first liquid transfer path (302a). The check ball spring (324) pressurizes the check ball (322) in the direction of the first liquid transfer path (302a), thereby closing the first liquid transfer path (302a) when the pressure in the storage space (202) increases due to the cylinder part (400), thereby inducing the liquid to be precisely sprayed into the nozzle hole (220).

[0081] When examined in detail, if the membrane (500) is deformed upward by the cylinder part (400) and the pressure in the storage space part (202) is lowered, the check ball (322) compresses the check ball spring (324) and the first liquid transfer path (302a) is opened, thereby supplying a certain amount of liquid to the storage space part (202). Conversely, if the membrane (500) is deformed downward by the cylinder part (400) and the pressure in the storage space part (202) is increased, the check ball (322) closes the first liquid transfer path (302a) by the check ball spring (324), and at the same time, the liquid in the storage space part (202) is sprayed through the nozzle hole (320).

[0082] For this purpose, the cylinder section (400) includes a cylinder body (410), a piston (420), and a cylinder spring (430). A cylinder space (402) is formed inside the cylinder body (410), and a fluid or gas capable of transmitting pressure is filled into the cylinder space (402). The piston (420) is installed to be movable along the cylinder space (402) and is installed to apply pressure to the driving protrusion (530) of the membrane (500). The cylinder spring (430) pressurizes the piston (420) toward the injection driving section (600).

[0083] In other words, the piston (420) is moved toward the membrane (500) by the injection drive unit (600) to pressurize the fluid in the cylinder space (402), and at the same time, the drive protrusion (530) is pressed so that the passive protrusion (520) is instantaneously protruded relative to the hinge point (H) to improve the liquid injection performance of the storage space (202) and allow it to be injected into the skin of the object.

[0084] Conversely, when the operation of the injection drive unit (600) is stopped, the piston (420) is moved toward the injection drive unit (600) by the cylinder spring (430) to release the pressure of the fluid, thereby lowering the pressure in the storage space (202) and supplying the liquid from the liquid filling unit (300) to the storage space (202).

[0085] Here, the cylinder portion (400) may further include a filling port (440). The filling port (440) is formed in the central portion of the piston (420) and communicates with the cylinder space portion (402) of the cylinder body (410). When the piston (420) moves, material from the cylinder space portion (402) enters and exits through this filling port (440), thereby improving pressure loss and pressure transmission power.

[0086] Looking more closely, when the piston (420) is pressurized in the direction of the nozzle (200) by the injection drive unit (600), the internal pressure initially increased instantaneously by the filling port (440) is relieved, preventing damage to the membrane (500). Accordingly, pressure loss in the cylinder space (402) and nozzle (200) can be reduced and efficient pressure transmission is possible, and mechanical damage due to the lubrication effect can be prevented. In addition, heat dissipation effects and mechanical thermal deformation can be reduced with a specific fluid, and a protective layer can be formed and contamination (corrosion) can be minimized. Furthermore, precise pressure control of the cylinder space (402) is possible, and safety and energy efficiency are increased by improving sealing and making maintenance easier.

[0087] As illustrated in FIG. 9, the needleless syringe (10) may further include an internal pressure maintaining unit (700). The internal pressure maintaining unit (700) is installed in the nozzle unit (200), and when the membrane (500) is deformed upward by the cylinder unit (400), that is, in the direction of the piston (420), it closes the nozzle hole (320) to induce the opening of the first liquid transfer path (302a). Conversely, when the membrane (500) is deformed downward by the cylinder unit (400), that is, in the direction of the nozzle unit (300), it opens the nozzle hole (320) to induce the liquid to be sprayed.

[0088] For this purpose, the nozzle body (210) includes a first nozzle body (212) and a second nozzle body (214). A storage space (202) is formed inside the first nozzle body (212). A nozzle hole (220) is formed inside the second nozzle body (214), and the second nozzle body (214) is connected to the first nozzle body (212).

[0089] The above internal pressure maintaining part (700) is elastic and is a second membrane (710) with multiple cuts in the central part, positioned between the first nozzle body (212) and the second nozzle body (214). When the membrane (500) is deformed in the direction of the piston (420) by the cylinder part (400), the central cut portion of the second membrane (710) is not opened, and conversely, when the membrane (500) is deformed in the direction of the nozzle part (300) by the cylinder part (400), the central cut portion is opened so that the liquid medicine is sprayed into the nozzle hole (220). Preferably, the central part of the second membrane (710) with the cut portion is formed to protrude in the direction of the nozzle hole (220), so that it is formed to open only when pressure is applied in the direction of the nozzle hole (220).

[0090]

[0091] Although the present invention has been described above with reference to the attached drawings and exemplary embodiments, the invention is not limited to the contents illustrated in the drawings and the embodiments described above. Drawing reference numerals have been indicated in the following claims to aid understanding, but the scope of the following claims is not limited to the drawing reference numerals and the contents illustrated in the drawings, and should be interpreted to encompass all variations of the exemplary embodiments, equivalent configurations, and functions.

[0092]

[0093] The present invention relates to a membrane and a needleless syringe using the same.

Claims

1. A body (510) having elasticity and installed between a driving chamber (402) and a driven chamber (202) to partition the driving chamber (402) and the driven chamber (202) in a sealed state; A pressurized cavity (522) is formed inside the driving chamber (402) and protrudes into the driven chamber (202) from the central part of the body (510); and It includes a driving protrusion (530) that protrudes into the driving chamber (402) at a certain distance from the edge of the body (510). An elastic membrane (500) for pressure transmission, wherein when pressure (F) is applied in the driving chamber (402) and the driving protrusion (530) is pressed toward the driven chamber (202), the edge of the body (510) toward the driven chamber (202) becomes a hinge point (H), and the driven protrusion (520) is deformed toward the driven chamber (202) to transmit pressure.

2. In claim 1, the body (510) is formed with a predetermined thickness, and a plurality of deformation portions (540) are formed along the circumference in contact with the driving chamber (402), forming an elastic membrane (500) for pressure transmission.

3. In paragraph 2, the elastic membrane (500) for pressure transmission, wherein the deformation portion (540) is formed at a certain distance from the pressurized cavity (522).

4. In paragraph 2, the pressure-transmitting elastic membrane (500), wherein the deformation portion (540) is formed by forming a deformation groove (542) to a predetermined depth in the body (510).

5. In paragraph 4, the pressure-transmitting elastic membrane (500), wherein the deformation grooves (542) are all formed to the same depth.

6. In paragraph 4, the pressure-transmitting elastic membrane (500) wherein the deformation groove (542) is formed such that its depth gradually decreases from the center of the body (510) toward the edge.

7. In paragraph 2, the pressure-transmitting elastic membrane (500), wherein the deformation portion (540) is formed by cutting the body (510) by the deformation hole (542').

8. In paragraph 4, the pressure-transmitting elastic membrane (500) wherein the deformation portion (540) has a formation width that gradually increases from the center of the body (510) toward the edge.

9. Casing (100); A nozzle part (200) having a storage space in which a drug solution to be injected is stored, and formed to spray the drug solution; A liquid filling section (300) where the liquid supplied to the nozzle section is located; A cylinder part (400) installed between the casing (100) and the nozzle part (200) to change the pressure of the nozzle part (200); A membrane (500) described in claim 1, having elasticity and deformed by a cylinder part (400) to supply the liquid of the liquid filling part (300) to the nozzle part (200) or to spray the liquid supplied to the nozzle part (200); and A needleless syringe (10) including an injection drive unit (600) installed in a casing (100) to operate the cylinder unit (400).

10. In claim 9, the cylinder part (400) is, A cylinder body (410) formed inside a cylinder space (402) filled with a fluid or gas capable of transmitting pressure; A piston (420) installed to be movable along the cylinder space (402) and installed to apply pressure to the driving protrusion (530) of the membrane (500); and A needleless syringe (10) comprising a cylinder spring (430) for pressing the above piston (420) in the direction of the injection drive unit (600).

Images