Replaceable needleless syringe and replaceable nozzle

Abstract

The nozzle-replaceable needleless syringe according to the present invention comprises a main body equipped with a driving force generating unit for pressurizing a drug and a nozzle for spraying the drug. Since the nozzle can be separated from or attached to the main body, allowing only the nozzle to be replaced from the main body for each procedure, there is an advantage in that secondary infection through the syringe can be prevented. Furthermore, since the structure of the attachment / detachment means for separating or attaching the nozzle from the main body is very simple and easy to use, convenience of use can be ensured. Additionally, since a sealing member is provided between the main body and the nozzle, drug adhering to the main body can be prevented, thereby enabling nozzle replacement while blocking contamination of the main body.

Description

Technology Field

[0001] The present invention relates to a needleless syringe, and more specifically, to a needleless syringe that can repeatedly inject drugs at high speed without a needle and can prevent contamination by allowing the nozzle to be replaced. Background Technology

[0002] Generally, a syringe is a device used to inject a liquid drug into the tissues of a living organism. A syringe consists of a needle inserted into the body, a syringe containing the liquid drug, and a piston that reciprocates inside the syringe to push the liquid drug into the needle. The needle has a hole to allow the drug to be injected when injected.

[0003] Recently, research and development on needleless syringes has been actively underway to alleviate the fear of syringe needles and prevent needle-induced infections.

[0004] However, conventional needleless syringes are designed to inject a specific amount of medication into only one spot on the skin at a time, which can cause damage to skin tissue.

[0005] In addition, there is a limitation in that it cannot be used to evenly inject multiple drugs into a large area of ​​skin in fields such as cosmetic procedures, as it entails inconveniences such as reloading after a single injection. Prior art literature

[0006] Korean Registered Patent No. 10-1945554 The problem to be solved

[0007] The objective of the present invention is to provide a needleless syringe that is reusable while preventing secondary infection caused by the nozzle, by making the nozzle for injecting drugs replaceable. means of solving the problem

[0008] A needleless syringe with a replaceable nozzle according to the present invention, which is a needleless syringe for repeatedly spraying a drug at high speed, comprises: a main body having a driving force generating unit that generates a driving force for spraying the drug; a nozzle detachably coupled to the main body and having a drug receiving unit that receives the drug, and spraying the drug received in the drug receiving unit to the outside by the driving force; and a detachable means provided on the main body and the nozzle, for separating the nozzle from the main body or coupling the nozzle to the main body when the nozzle is replaced.

[0009] The above-described detachable means comprises a plurality of coupling pieces, one end of which is fixed to the main body and the other end of which is formed to elastically spread toward the outer direction of the main body and has a hook formed at the other end; a hollow slider formed to be slidably movable in the axial direction on the outer surface of the main body, which presses the coupling pieces toward the inner direction of the main body when moving forward and releases the pressure on the coupling pieces when moving backward; and a hook coupling groove formed on the outer surface of the nozzle, which engages with the hook of the coupling pieces when the slider presses the coupling pieces. When the slider moves backward, the nozzle is inserted into a nozzle insertion opening formed in the main body, and when the slider moves forward, the hook is coupled to the hook coupling groove.

[0010] The above-described detachable means comprises a button installed on the outer surface of the main body so as to be pressable toward the inside, a hook connected to the button and protruding toward the nozzle, and a hook coupling groove formed on the nozzle such that the hook is inserted when the button is pressed and the hook is engaged and coupled when the button is released.

[0011] The above-mentioned detachable means further includes a coupling projection formed to protrude toward the main body from a surface facing the main body from the nozzle, and a coupling groove formed in the main body to press-fit the coupling projection.

[0012] The above-described detachable means comprises a pivot groove formed on the outer circumference of a nozzle insertion opening formed on the front surface of the main body; and a pivot projection protruding outwardly from the outer surface of the nozzle, which is inserted into the pivot groove when the nozzle is inserted into the nozzle insertion opening and engages with the nozzle insertion opening when the nozzle is rotated, thereby connecting the nozzle by rotating it by a predetermined angle after inserting it into the nozzle insertion opening.

[0013] The above-described attachment / detachment means comprises a coupling piece rotatably coupled to the main body and formed to open toward the outer direction of the main body when grasped and pressed, having a hook formed at its end; an elastic member provided between the main body and the coupling piece to restore the coupling piece to its original position; and a hook coupling groove formed on the outer surface of the nozzle to engage and connect the hook.

[0014] The above-described attachment means comprises a guide projection formed protruding outwardly on the outer surface of the main body, a coupling groove formed on the outer surface of the nozzle, a rotating shaft inserted into the coupling groove, a width-direction moving slit formed long in the width direction at a position spaced by a set distance in the length direction from the rotating shaft so that the guide projection is inserted therein and can move in the width direction, and a length-direction moving slit extending in the length direction from the width-direction moving slit so that the guide projection can move in the length direction, and a coupling rotating lever comprising the guide projection and the guide projection. The coupling rotating lever rotates around the rotating shaft and varies the distance between the guide projection and the rotating shaft according to the rotation angle, thereby coupling the nozzle while bringing it into close contact with the front surface of the main body.

[0015] The above-described detachable means comprises a coupling pin formed protruding from the outer surface of the nozzle, an axial guide groove formed on the side of the main body and extending axially so that the coupling pin can slide axially when the nozzle is inserted axially into the interior of the main body, and a rotational coupling groove formed on the side of the main body that communicates with the axial guide groove and extends axially in the rotational direction of the nozzle perpendicular to the axial direction, so that when the nozzle inserted into the interior of the main body is rotated, the coupling pin slides axially and then engages.

[0016] The above-mentioned rotational coupling groove is formed with a width smaller than the diameter of the coupling pin and includes a detachment prevention member that prevents the coupling pin from detaching.

[0017] It further includes a drug ampoule formed to be detachably coupled to an ampoule mounting portion formed on the outer surface of either the main body or the nozzle, and to supply a drug to a drug supply hole formed in the drug receiving portion, and an ampoule cover installed to open and close the ampoule mounting portion.

[0018] The above driving force generating unit includes a pressure chamber stored in a pressure-generating liquid and provided inside the main body, and an energy focusing unit that concentrates and applies energy to the pressure-generating liquid stored in the pressure chamber, and sprays the drug using the pressure of a bubble generated by the temporary vaporization of the pressure-generating liquid by the energy applied from the energy focusing unit.

[0019] It further includes a sealing member provided on at least one of the main body and the nozzle, which prevents the drug contained in the drug receiving portion from leaking to the driving force generating portion.

[0020] The sealing member comprises a fixed elastic membrane installed at the end of the pressure chamber and expanding in a direction that pressurizes the drug in the drug receiving portion when the pressure of the pressure chamber rises, and a replaceable elastic membrane installed at the nozzle opposite to the fixed elastic membrane, expanding together with the fixed elastic membrane, and detachable from the main body together with the nozzle.

[0021] The above driving force generating unit includes a solenoid coil wound around the outer circumference of the main body, a moving magnetic body inserted longitudinally into the interior of the main body and moving forward by a magnetic force generated when current is applied to the solenoid coil, a piston inserted in front of the moving magnetic body within the main body and moving forward by an impact force applied by the moving magnetic body when the moving magnetic body moves forward, an elastic member for the moving magnetic body provided between the moving magnetic body and the piston and providing elastic force to the moving magnetic body in the direction in which the moving magnetic body moves backward, and a forward / backward driving means that repeats the supply and interruption of current to the solenoid coil at a preset period to repeat the forward and backward movement of the piston.

[0022] It further includes a sealing member provided on at least one of the main body and the nozzle, which prevents the drug contained in the drug receiving portion from leaking to the driving force generating portion.

[0023] The sealing member includes a replaceable elastic membrane that is installed opposite to the end of the piston at the nozzle and formed to be expandable during the forward and backward movement of the piston, and is detachable from the main body together with the nozzle.

[0024] The above-mentioned replacement elastic membrane is fastened and secured to a cover holder provided on the inner circumference of the drug receiving portion.

[0025] The sealing member includes a fixed elastic membrane that is fixedly installed inside the main body to cover the end of the piston and is formed to be expandable when the piston moves forward and backward.

[0026] The sealing member includes a replacement piston that is detachably coupled to the end of the piston and disposed inside the drug receiving portion, and pressurizes the drug in conjunction with the piston when the piston moves forward and backward.

[0027] A screw coupling portion having male screw threads is formed protrudingly on either of the above piston or the above replacement piston, and a coupling groove having female screw threads is formed on the other of the above piston or the above replacement piston so that the screw coupling portion is screw-coupled.

[0028] The sealing member further comprises a replacement piston configured to be movable forward and backward within the nozzle and pressurizing the drug by moving forward when the piston moves forward, and an elastic member for the replacement piston configured between the nozzle and the replacement piston to provide elastic force to cause the replacement piston to move backward when the piston moves backward.

[0029] A needleless syringe with a replaceable nozzle according to another aspect of the present invention, which is a needleless syringe for repeatedly spraying a drug at high speed, comprises: a hollow main body; a pressure chamber provided inside the main body and storing a pressure-generating liquid, and an energy focusing unit that concentrates and applies energy to the pressure-generating liquid stored in the pressure chamber, wherein the pressure of a bubble generated by the temporary vaporization of the pressure-generating liquid by the energy applied from the energy focusing unit is used as a driving force for spraying the drug; a nozzle that is detachably coupled to an open front surface of the main body and is provided with a drug receiving portion that communicates with the open front surface of the pressure chamber and receives the drug, and sprays the drug received in the drug receiving portion to the outside by the pressure applied from the pressure chamber; a detachable means provided on the main body and the nozzle to detachably coupled the nozzle to the main body; and a fixed elastic membrane installed at the end of the pressure chamber and expanding in a direction that pressurizes the drug in the drug receiving portion when the pressure of the pressure chamber rises. It includes a replaceable elastic membrane installed opposite to the fixed elastic membrane at the nozzle, which expands together with the fixed elastic membrane, and which is detachably attached to and detached from the main body together with the nozzle.

[0030] A needleless syringe with a replaceable nozzle according to another aspect of the present invention, which is a needleless syringe for repeatedly spraying a drug at high speed, comprises: a hollow main body; a solenoid coil wound around the outer circumference of the main body; a kinetic magnetic body inserted longitudinally into the interior of the main body and moving forward by a magnetic force generated when current is applied to the solenoid coil; a piston inserted in front of the kinetic magnetic body within the main body and moving forward by an impact force applied by the kinetic magnetic body when the kinetic magnetic body moves forward; an elastic member for the kinetic magnetic body provided between the kinetic magnetic body and the piston and providing elastic force to the kinetic magnetic body in the direction of backward movement of the kinetic magnetic body; and a forward / backward driving means that repeats the supply and interruption of current to the solenoid coil at a preset period to repeat the forward and backward movement of the piston, thereby generating a driving force for spraying the drug; The nozzle is detachably coupled to the main body and is provided with a drug receiving portion for receiving the drug, and sprays the drug contained in the drug receiving portion to the outside by the driving force; a detachment means provided on the main body and the nozzle for separating the nozzle from the main body or coupling the nozzle to the main body when replacing the nozzle; a fixed elastic membrane fixedly installed inside the main body to cover the end of the piston and formed to be extendable when the piston moves forward and backward; and a replaceable elastic membrane installed at the nozzle opposite to the end of the piston and formed to be extendable when the piston moves forward and backward, and detachable from the main body together with the nozzle.

[0031] A needleless syringe with a replaceable nozzle according to another aspect of the present invention, which is a needleless syringe for repeatedly spraying a drug at high speed, comprises: a hollow main body; a solenoid coil wound around the outer circumference of the main body; a kinetic magnetic body inserted longitudinally into the interior of the main body and moving forward by a magnetic force generated when current is applied to the solenoid coil; a piston inserted in front of the kinetic magnetic body within the main body and moving forward by an impact force applied by the kinetic magnetic body when the kinetic magnetic body moves forward; an elastic member for the kinetic magnetic body provided between the kinetic magnetic body and the piston and providing elastic force to the kinetic magnetic body in the direction of backward movement of the kinetic magnetic body; and a forward / backward driving means that repeats the supply and interruption of current to the solenoid coil at a preset period to repeat the forward and backward movement of the piston, thereby generating a driving force for spraying the drug; It includes: a nozzle detachably coupled to the main body and provided with a drug receiving portion for receiving the drug, which sprays the drug contained in the drug receiving portion to the outside by the driving force; a detachment means provided on the main body and the nozzle for separating the nozzle from the main body or attaching the nozzle to the main body when replacing the nozzle; and a replacement piston detachably coupled to the end of the piston and disposed inside the drug receiving portion, which pressurizes the drug in conjunction with the piston when the piston moves forward or backward. Effects of the invention

[0032] The nozzle-replaceable needleless syringe according to the present invention comprises a main body equipped with a driving force generating unit for pressurizing a drug and a nozzle for spraying a drug, and the nozzle can be separated from or connected to the main body, so that only the nozzle can be replaced from the main body for each procedure, thus having the advantage of preventing secondary infection through the syringe.

[0033] In addition, since the structure of the detachable means for separating or attaching the nozzle from the main body is very simple and easy to use, convenience of use can be ensured.

[0034] In addition, since a sealing member is provided between the main body and the nozzle, drug can be prevented from adhering to the main body, allowing for nozzle replacement while preventing contamination of the main body. Brief explanation of the drawing

[0035] FIG. 1 is a perspective view showing a nozzle-replaceable needleless syringe according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing the attachment and detachment means of a nozzle-replaceable needleless syringe according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view showing the state in which a nozzle is coupled to the main body using the detachable means shown in FIG. 2. FIG. 4 is a cross-sectional view showing a method of combining a main body and a nozzle using the detachable means shown in FIG. 2. FIG. 5 is a cross-sectional view schematically showing the attachment and detachment means of a needleless syringe according to a second embodiment of the present invention. FIG. 6 is a cross-sectional view schematically showing the attachment and detachment means of a needleless syringe according to the third embodiment of the present invention. FIG. 7 is a perspective view showing the main body and nozzle of the needleless syringe shown in FIG. 6 separated. FIG. 8 is a cross-sectional view schematically showing the means for attaching and detaching a needleless syringe according to the fourth embodiment of the present invention. FIG. 9 is a perspective view showing the main body and nozzle of the needleless syringe shown in FIG. 8 separated. FIG. 10 is a cross-sectional view schematically showing the means for attaching and detaching a needleless syringe according to the fifth embodiment of the present invention. FIG. 11 is a schematic cross-sectional view of a needleless syringe according to the 6th embodiment of the present invention. FIG. 12 is a cross-sectional view schematically showing a sealing member of a needleless syringe according to the seventh embodiment of the present invention. FIG. 13 is a cross-sectional view schematically showing the state in which the nozzle and the replacement piston are separated from the main body shown in FIG. 12. FIG. 14 is a cross-sectional view schematically showing a sealing member of a needleless syringe according to the eighth embodiment of the present invention. FIG. 15 is a schematic perspective view of a needleless syringe according to the ninth embodiment of the present invention. FIG. 16 is a schematic perspective view showing the drug ampoule of the needleless syringe shown in FIG. 15 separated. FIG. 17 is a schematic perspective view of a needleless syringe according to the 10th embodiment of the present invention. FIG. 18 is a cross-sectional view schematically showing the configuration of the nozzle of the needleless syringe illustrated in FIG. 17. FIG. 19 is a schematic perspective view of a needleless syringe according to the 11th embodiment of the present invention. FIG. 20 is a schematic side view showing the nozzle of the needleless syringe shown in FIG. 19 in a rotated state. FIG. 21 is a side view showing the nozzle of the needleless syringe shown in FIG. 20 separated. Specific details for implementing the invention

[0036] Hereinafter, a needleless syringe according to embodiments of the present invention will be described with reference to the attached drawings.

[0037] FIG. 1 is a perspective view showing a nozzle-replaceable needleless syringe according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing a nozzle-replaceable needleless syringe according to a first embodiment of the present invention. FIG. 3 is a cross-sectional view showing a state in which a nozzle is coupled to a main body using the nozzle-replaceable means shown in FIG. 2. FIG. 4 is a cross-sectional view showing a method of coupling a main body and a nozzle using the nozzle-replaceable means shown in FIG. 2.

[0038] Referring to FIGS. 1 to 4, the needleless syringe (10) according to the first embodiment of the present invention is a syringe that repeatedly sprays a drug at high speed without a needle.

[0039] The above needleless syringe (10) includes a main body (20), a nozzle (30), a nozzle cap (40), a drug ampoule (60), a sealing member (70), and a detachable means (100).

[0040] The above main body (20) is formed to form an exterior and to be held by a user's hand, and is formed in a hollow shape. Inside the main body (20), a driving force generating unit (50) is provided to generate a driving force for spraying the drug at high speed.

[0041] The above driving force generating unit (50) includes a pressure chamber (51) and an energy focusing unit.

[0042] The pressure chamber (51) is provided inside the main body (20) and is formed as a sealed space to store a pressure-generating liquid.

[0043] The energy focusing unit is a device that concentrates and applies energy to a pressure-generating liquid stored in the pressure chamber (51). The energy focusing unit may include a laser generator (52) that generates a laser beam and irradiates it so that it is focused on the pressure-generating liquid stored in the pressure chamber (51), and an electrode that passes electrical energy. Hereinafter, in this embodiment, the energy focusing unit is described as a laser generator.

[0044] The laser generator (52) includes a laser irradiation unit (52a) and an objective lens (52b). The laser generator does not irradiate the laser beam directly onto the drug solution, but rather irradiates it onto the pressure-generating liquid stored in the pressure chamber (51), thereby causing the molecular structure of the pressure-generating liquid to collapse and generate rapid gas bubbles.

[0045] The pressure-generating liquid described above uses degassed water to minimize residual bubbles before and after laser irradiation and injection, and various other liquid substances such as polymer sols or gels like alcohol or polyethylene glycol can be used. Additionally, if water-soluble electrolytes such as salt are added to pure water, the energy required for liquid molecules to collapse is reduced due to the ionization effect, allowing stronger energy to be used for volume expansion.

[0046] The nozzle (30) is detachably coupled to the main body (20) so that it can be separated from the main body (20) after one use and replaced with a new nozzle.

[0047] The nozzle (30) includes a drug receiving portion (30a), which is a space for receiving the drug inside, and a spraying channel (30b) that communicates with the drug receiving portion (30a) and sprays the drug to the outside.

[0048] The nozzle (30) is coupled to the open front surface of the main body (20), and is described as having a pointed cone shape with a cross-sectional area that gradually decreases.

[0049] A nozzle opening / closing valve (31) is installed in the above injection path (30b).

[0050] The nozzle opening / closing valve (31) is provided to open and close a communication hole between the drug receiving section (30a) and the spraying path (30b). The nozzle opening / closing valve (31) is pushed out by hydraulic pressure applied by the drug to open the communication hole, and elastically restores to close the communication hole when the hydraulic pressure is released. The nozzle opening / closing valve (31) is described as being a ball valve. That is, the nozzle opening / closing valve (31) includes a ball (31a) installed in the communication hole and an elastic member (31b) installed in the spraying path (30b) that provides elastic force in the direction in which the ball (31a) closes the communication hole. However, it is not limited thereto, and the nozzle opening / closing valve (31) may use various valves such as a duckbill valve, a plate check valve, or an electric control valve.

[0051] The nozzle cap (40) is formed to be placed over the nozzle (30) to prevent contamination of the nozzle (30).

[0052] Meanwhile, the sealing member (70) is installed in at least one of the main body (20) and the nozzle (30) to prevent the drug contained in the drug receiving portion (30a) from leaking into the main body (20).

[0053] The sealing member (70) includes a fixed elastic membrane (71) fixedly installed on the main body (20) and a replaceable elastic membrane (72) installed on the nozzle (30) and removed together with the nozzle (30) when the nozzle (30) is replaced.

[0054] The fixed elastic membrane (71) is installed to cover the open front of the pressure chamber (51) in the main body (20). The fixed elastic membrane (71) is formed of a stretchable material so that it expands in the direction toward the drug receiving portion (30a) by the pressure when the pressure in the pressure chamber (51) rises, and can be restored when the pressure in the pressure chamber (51) is dissipated.

[0055] The above-mentioned replacement elastic membrane (72) is installed opposite the fixed elastic membrane (71) at the nozzle (30) to cover the drug receiving portion (30a). The above-mentioned replacement elastic membrane (72) is formed of a stretchable material that can expand together with the fixed elastic membrane (71) and then restore.

[0056] As described above, in this embodiment, the sealing member (70) is described as having two elastic membranes, but it is not limited thereto, and it is also possible to have only the fixed elastic membrane (71).

[0057] The above drug ampoule (60) is fitted and coupled to an ampoule mounting part (61) formed on the outer side of the main body (20). A drug supply hole is formed to communicate with each other inside the main body (20) and inside the nozzle (30), and the ampoule mounting part (61) communicates with the drug supply hole.

[0058] The above detachable means (100) is provided on the main body (20) and the nozzle (30) to detach the nozzle (30) from the main body (20) or to attach the nozzle (30) to the main body (20) when the nozzle (30) is replaced.

[0059] Hereinafter, in this embodiment, the detachable means (100) is described as a lever structure that combines the main body (20) and the nozzle (30) and brings the nozzle (30) into close contact with the main body (20) to maximize the sealing force.

[0060] The above detachable means (100) includes a guide projection (101) formed to protrude outwardly from the outer surface of the main body (20), a coupling groove (102) formed on the outer surface of the nozzle (30), and a coupling rotary lever (103) that connects the main body (20) and the nozzle (30) while rotating around a rotation axis (103a).

[0061] The guide projection (101) above is described as being formed in a cylindrical shape.

[0062] The above-mentioned connecting rotary lever (103) is formed in a lever shape that a user can grasp and rotate.

[0063] The above-mentioned coupling rotary lever (103) is formed with a rotation axis (103a) that acts as a central axis when rotating and is formed in the shape of a projection or pin so as to be inserted into the coupling groove (102) of the nozzle (30), and a guide slit (104) formed so that the guide projection (101) of the main body (20) is inserted and can move.

[0064] Referring to FIG. 4, the guide slit (104) includes a width-direction moving slit (104a) formed in the width-direction of the coupling rotation lever (103) at a position spaced apart from the rotation axis (103a) by a predetermined distance (d1) in the length-direction of the coupling rotation lever (103) so that the guide projection (101) is inserted therein and can move in the width-direction, and a length-direction moving slit (104b) extended in the length-direction from the width-direction moving slit (104a) so that the guide projection (101) can move in the length-direction.

[0065] That is, the width-direction moving slit (104a) and the length-direction moving slit (104b) are connected to each other and are formed long in a direction perpendicular to each other. The space between the width-direction moving slit (104a) and the length-direction moving slit (104b) is formed in a rounded shape.

[0066] The above-mentioned coupling rotary lever (103) rotates around the rotation axis (103a) and varies the distance between the guide projection (101) and the rotation axis (103a) according to the rotation angle, thereby enabling the nozzle (30) to be brought into close contact with the main body (20).

[0067] The method for attaching and detaching the nozzle from the main body in the needleless syringe according to the first embodiment of the present invention configured as described above is as follows.

[0068] First, referring to FIGS. 2 and FIGS. 4a, the coupling rotary lever (103) is coupled to the main body (20) and the nozzle (30).

[0069] The guide projection (101) of the main body (20) is inserted into the longitudinal moving slit (104b), and the rotation axis (103a) of the coupling rotation lever (103) is inserted into the coupling groove (102) of the nozzle (30).

[0070] At this time, as shown in FIG. 4a, the coupling rotary lever (103) is coupled while rotated counterclockwise with respect to the longitudinal direction of the main body (20).

[0071] Afterwards, the connecting rotary lever (103) is rotated clockwise around the rotation axis (103a).

[0072] Referring to FIGS. 4b and 4c, when the coupling rotary lever (103) is rotated, the guide projection (101) moves along the longitudinal moving slit (104b) and the widthwise moving slit (104a), and the coupling rotary lever (103) serves to lift the nozzle (30) in a direction that brings it into close contact with the main body (20).

[0073] That is, as the rotation angle of the coupling rotary lever (103) increases, the distance between the guide projection (101) and the rotation axis (103a) decreases, so that the main body (20) and the nozzle (30) are more closely connected, and the sealing force can be improved.

[0074] In FIG. 4c, the first distance (d1) between the guide projection (101) and the rotation axis (103a) is shorter than the second distance (d2) between the guide projection (101) and the rotation axis (103a) in FIG. 4b.

[0075] When separating the nozzle (30) from the main body (20), the coupling rotation lever (103) is rotated counterclockwise to increase the distance between the guide projection (101) and the rotation axis (103a), and then the coupling rotation lever (103) can be removed from the guide projection (101).

[0076] As described above, in this embodiment, the nozzle (30) can be separated from the main body (20) and the nozzle (30) can be replaced. Therefore, the main body equipped with the driving force generating unit can be reused repeatedly, but only the nozzle (30) that comes into contact with the patient's skin can be replaced, thus preventing contamination between patients.

[0077] Accordingly, when the nozzle (30) is attached to the main body (20), the attachment rotating lever (103) is used as a lever to bring the main body (20) and the nozzle (30) into close contact, thereby ensuring a sealing force when attaching or detaching the nozzle (30).

[0078] FIG. 5 is a cross-sectional view schematically showing the attachment and detachment means of a needleless syringe according to a second embodiment of the present invention.

[0079] Referring to FIG. 5, the attachment / detachment means (120) of a needleless syringe according to the second embodiment of the present invention comprises a coupling piece (121) fixedly installed inside the main body (20), a slider (122) slidably coupled to the outer surface of the main body (20), and a hook coupling groove (123) formed on the outer circumference of the nozzle (30). The configuration in which a user attaches or detaches the nozzle (30) by pushing or pulling the slider (122) is different from that of the first embodiment, and the remaining configuration and operation are similar to that of the first embodiment. Therefore, a detailed description of the similar configuration is omitted, and the differences are described in detail.

[0080] The above-mentioned connecting piece (121) is provided in a plurality of units inside the main body (20) at a predetermined distance from each other along the circumferential direction, and is formed to close or open according to the forward and backward movement of the slider (122).

[0081] Each of the above connecting pieces (121) is formed such that one side is fixed inside the main body (20) and the other side elastically opens toward the outside of the main body (20).

[0082] The other end of the above-mentioned connecting piece (12) has a hook (121a) formed thereon.

[0083] The above slider (122) is formed in a hollow sleeve shape and is coupled to be slidably movable along the outer surface of the main body (20).

[0084] The above slider (122) is formed to surround the outer side of the coupling pieces (121), so that when moving forward, it presses the coupling pieces (121) toward the inner side of the main body (20) to cause the coupling pieces (121) to be closed, and when moving backward, the pressure on the coupling pieces (121) is released so that the coupling pieces (121) can be elastically opened.

[0085] In this embodiment, the slider (122) is described as moving manually by the operator directly pushing or pulling the slider (122). However, it is not limited thereto, and it is also possible to have an elastic member (not shown) installed to provide elastic force in the direction of forward movement of the slider (122), so that the operator pulls the slider (122) toward the main body (20) to move it backward, and when there is no pulling force, it is elastically restored to move forward.

[0086] The hook coupling groove (123) is formed so that the hook (121a) is caught on the outer surface of the nozzle (30). The hook coupling groove (123) includes a seating portion (123a) on which the hook (121a) is seated, and a catch portion (123b) on which the hook (121a) is caught.

[0087] The method for attaching and detaching a nozzle using the attachment and detachment means according to the second embodiment of the present invention configured as above is described as follows.

[0088] Referring to FIG. 5a, when the nozzle (30) is separated from the main body (20), the slider (122) is moved backward.

[0089] When the slider (122) moves backward, the connecting pieces (122) spread outward, thereby releasing the connection between the hook (121a) and the hook connecting groove (123).

[0090] With the above connecting pieces (122) spread outward, a new nozzle can be reconnected to the main body (20).

[0091] Referring to FIG. 5b, after inserting the nozzle (30) between the coupling pieces (122), the slider (122) is moved forward.

[0092] When the slider (122) moves forward, the connecting pieces (122) are closed inward, and the hook (121a) is connected to the hook connecting groove (123).

[0093] As described above, in the second embodiment of the present invention, the nozzle (30) can be replaced by pushing or pulling the slider (122), so the nozzle (30) can be easily replaced.

[0094] FIG. 6 is a cross-sectional view schematically showing a means for attaching and detaching a needleless syringe according to a third embodiment of the present invention. FIG. 7 is a perspective view showing the state in which the main body and nozzle of the needleless syringe shown in FIG. 6 are separated.

[0095] Referring to FIGS. 6 and 7, the attachment / detachment means (130) of a needleless syringe according to the third embodiment of the present invention comprises a push button (131) provided on the outer surface of the main body (20), a hook (132) connected to the button (131), and a hook attachment groove (133) provided on the nozzle (30) to which the hook (132) is coupled. The configuration in which a user presses or releases the push button (131) to detach or attach the nozzle (30) is different from that of the first embodiment, and the remaining configuration and operation are similar to that of the first embodiment. Therefore, a detailed description of the similar configuration is omitted, and the differences are described in detail.

[0096] The above button (131) is installed so as to protrude outward from the outer surface of the main body (20) and be pressable inward.

[0097] The button (131) is mounted on the main body (20), and a button mounting groove (131a) is formed so as to be movable inward.

[0098] The hook (132) is formed at the end of the button (131) and protrudes in a direction toward the nozzle (30), and is coupled to the hook coupling groove (133) of the nozzle (30).

[0099] The hook coupling groove (133) is formed on the surface facing the main body (20) from the nozzle (30). The hook coupling groove (133) is formed to be larger than the hook (132), so that the hook (132) is inserted while the button (131) is pressed, and a catch projection (133a) is formed so that the hook (132) is caught when the button (131) is released.

[0100] Additionally, the detachable means (130) may further include a coupling projection (134) formed protruding toward the main body (20) from the surface facing the main body (20) from the nozzle (30), and a coupling groove (135) formed on the main body (20) to allow the coupling projection (134) to be inserted.

[0101] FIG. 8 is a cross-sectional view schematically showing a means for attaching and detaching a needleless syringe according to a fourth embodiment of the present invention. FIG. 9 is a perspective view showing the state in which the main body and nozzle of the needleless syringe shown in FIG. 8 are separated.

[0102] Referring to FIGS. 8 and 9, the attachment / detachment means (140) of the needleless syringe according to the fourth embodiment of the present invention includes a rotation groove (141) formed on the outer circumference of a nozzle insertion opening (20a) formed on the front surface of the main body (20), and a rotation projection (142) protruding outward from the outer surface of the nozzle (30) and coupled to the rotation groove (141). The configuration in which a user grasps the nozzle (30) and rotates it to detach or attach is different from the first embodiment, and the remaining configuration and operation are similar to the first embodiment. Therefore, a detailed description of the similar configuration is omitted, and the differences are described in detail.

[0103] The above-mentioned pivoting projections (142) may be formed in multiple numbers along the circumferential direction on the outer surface of the nozzle (30) at a predetermined distance from each other. In this embodiment, two are formed as an example.

[0104] The above-mentioned pivot projection (142) is inserted into the pivot groove (141) when the nozzle (30) is inserted into the nozzle insertion opening (20a), and when the nozzle (30) is inserted and rotated, it is caught in the nozzle insertion opening (20a) to prevent detachment.

[0105] The detachable means according to the fourth embodiment of the present invention configured as above inserts the nozzle (30) into the nozzle insertion port (20a) and then rotates it by a predetermined angle so that the rotating projection (142) engages with the nozzle insertion port (20a).

[0106] Meanwhile, when separating the nozzle (30), the nozzle (30) can be separated by rotating it by a predetermined angle so that the rotational projection (142) is positioned in the rotational groove (141).

[0107] FIG. 10 is a cross-sectional view schematically showing the means for attaching and detaching a needleless syringe according to the fifth embodiment of the present invention.

[0108] The attachment / detachment means (150) of the needleless syringe according to the fifth embodiment of the present invention comprises a coupling piece (151) formed to be rotatably coupled to the main body (20) and to spread outward toward the main body (20) when grasped and pressed, an elastic member provided between the main body (20) and the coupling piece (151) to restore the coupling piece (151) to its original position, and a hook coupling groove (152) formed in the nozzle (30). The configuration in which a user grasps and presses the coupling pin (151) to detach the nozzle (30) is different from the first embodiment, and the remaining configuration and operation are similar to the first embodiment. Therefore, a detailed description of the similar configuration is omitted, and a detailed description focusing on the differences is provided.

[0109] The above connecting piece (151) is connected to the main body (20) by a rotation axis (155). When one end of the connecting piece (151) is grasped and pressed, it opens toward the outer direction of the main body (20), and when the pressure is released, it returns to its original position by the restoring force of the elastic member. The connecting piece (151) has a clamp structure.

[0110] The above-mentioned connecting piece (151) may be formed in multiple numbers along the circumferential direction on the outer surface of the main body (20). In this embodiment, it is described as an example where two are formed to make it easy for a user to grasp and press.

[0111] A hook (153) is formed at the end of the above-mentioned connecting piece (151).

[0112] The above elastic member may be a torsion spring (not shown), etc.

[0113] The method for attaching and detaching a nozzle using the attachment and detachment means according to the second embodiment of the present invention configured as above is described as follows.

[0114] Referring to FIG. 10a, when the nozzle (30) is separated, if the connecting piece (151) is grasped and pressed, the connecting piece (151) rotates and spreads outward.

[0115] When the above connecting pieces (151) rotate, the connection between the hook (153) and the hook connecting groove (152) is released.

[0116] With the above connecting pieces (151) spread outward, a new nozzle can be reconnected to the main body (20).

[0117] Referring to FIG. 10b, after inserting the nozzle (30) between the connecting pieces (151), the force of holding and pressing the connecting pieces (151) is released.

[0118] When the pressure on the above coupling piece (151) is released, the coupling piece (151) is elastically restored to its original position by the torsion spring (not shown).

[0119] As the above connecting pieces (151) are closed inward again, the hook (153) is connected to the hook connection groove (152).

[0120] As described above, in the fifth embodiment of the present invention, the nozzle (30) can be replaced by the user holding and pressing the coupling piece (151), so the replacement of the nozzle (30) is easy.

[0121] FIG. 11 is a schematic cross-sectional view of a needleless syringe according to the 6th embodiment of the present invention.

[0122] Referring to FIG. 11, the needleless syringe (200) according to the sixth embodiment of the present invention is configured such that a driving force generating unit (210) for generating a driving force for spraying a drug includes a solenoid coil (211), a moving magnetic body (212), a piston (213), an elastic member (214) for the moving magnetic body, and a forward / backward driving means, and a detachable means (160) includes a push button (161), a hook (162), and a hook coupling groove (163), so that a drug is sprayed according to the forward and backward movement of the piston (213), and the user separates or attaches the nozzle (30) by pressing or releasing the push button (161). Since the remaining configuration and operation are similar to the first embodiment, a detailed description of the similar configuration is omitted, and the differences are described in detail.

[0123] The needleless syringe (200) according to the sixth embodiment of the present invention is an impact type syringe in which the moving magnetic body (212) moves forward by the magnetic force generated by the solenoid coil (211), and the moving magnetic body (212) collides with the piston (213) to move the piston (213) forward.

[0124] The driving force generating means according to the 6th embodiment of the present invention is applicable to all of the 1st to 5th embodiments.

[0125] The above main body (20) includes a first tube (21) having a hollow shape and a second tube (22) screw-coupled to the front of the first tube (21).

[0126] The solenoid coil (211) is wound on the front side of the outer surface of the first tube (21) of the main body (20), and is a coil to which current is applied when the piston (213) moves forward. When current is applied, the solenoid coil (211) generates a magnetic force in the direction in which the moving magnetic body (212) moves forward, thereby causing the moving magnetic body (212) to move forward.

[0127] The piston (213) is inserted lengthwise into the interior of the main body (20) and serves to push out the drug contained in the drug receiving portion (30a).

[0128] The above piston (213) is described as being provided separately from the moving magnetic body (212) inside the main body (20) as an example, but is not limited thereto and can, of course, be formed integrally.

[0129] The above-mentioned moving magnetic body (212) is not a permanent magnet, but is formed of a material that temporarily possesses magnetism due to the magnetic field generated when current is applied to the solenoid coil (211), and loses its magnetism when the external magnetic field disappears. The above-mentioned moving magnetic body (212) is described as an example of an iron core.

[0130] The elastic member (214) for the moving magnetic body is provided in the interior of the main body (20) between the moving magnetic body (214) and the piston (213) in the longitudinal direction of the main body (20). The elastic member (214) for the moving magnetic body imparts elastic force to the moving magnetic body (213) in the direction in which the moving magnetic body (213) moves backward.

[0131] The above forward and backward driving means can repeat the supply and cut off of current to the solenoid coil (211) at a preset cycle, thereby repeating the forward and backward movement of the piston (213) multiple times.

[0132] The above forward and backward driving means includes a current supply unit (not shown) and an elastic member (215) for the piston.

[0133] The above current supply unit (not shown) applies current to the solenoid coil (211) when the piston (213) moves forward, thereby moving the moving magnetic body (212) forward. When the piston (213) moves backward, the current to the solenoid coil (211) is cut off.

[0134] The above elastic member (215) for the piston is an elastic member that imparts elastic force to the piston (213) in the direction in which the piston (213) moves backward when the current supply of the current supply unit is cut off. The above elastic member (215) for the piston includes a second coil spring (215a) and a third coil spring (215b) coupled to the outer surface of the piston (213).

[0135] The above needleless syringe (200) may further include a cooling chamber (216) that cools the heat generated from the solenoid coil (211) through a cooling fluid.

[0136] The cooling chamber (216) can be detachably coupled to the outside of the main body (20).

[0137] Meanwhile, the needleless syringe (200) according to the sixth embodiment of the present invention further includes a sealing member (220) provided in at least one of the main body (20) and the nozzle (30) to prevent the drug contained in the drug receiving portion (30a) of the nozzle (30) from leaking toward the main body (20).

[0138] The sealing member (220) includes a fixed elastic membrane (217) fixedly installed inside the main body (20) and positioned to cover the end of the piston (213), and a replacement elastic membrane (218) fixedly installed inside the nozzle (30) and positioned opposite to the fixed elastic membrane (217).

[0139] The above fixed elastic membrane (217) may be fitted and coupled to the inner surface of the main body (20), or it may be fixedly installed on the inner surface of the main body (20) by means such as adhesion or coupling.

[0140] The fixed elastic membrane (217) is formed of a material that is elastic when the piston (213) moves forward and backward. The fixed elastic membrane (217) is formed of a material that is elastic so that it is stretched forward by the piston (213) when the piston (213) moves forward, and restored when the piston (213) moves backward. In this embodiment, the fixed elastic membrane (217) is described as being a rubber membrane.

[0141] The above-mentioned replacement elastic membrane (218) may be fitted and coupled to the inner surface of the drug receiving portion (30a) in the nozzle (30), or it may be fixedly installed on the inner surface of the drug receiving portion (30a) by means such as adhesion or coupling. Additionally, the above-mentioned replacement elastic membrane (218) may be fastened and fixed to an elastic membrane holder provided on the inner surface of the drug receiving portion (30a) so that the frictional force is reduced when the replacement elastic membrane (218) is stretched.

[0142] The above-mentioned replacement elastic membrane (218) can prevent the drug from adhering directly to the above-mentioned fixed elastic membrane (217) and can be replaced together with the nozzle (30) when the nozzle (30) is replaced.

[0143] The above-mentioned replacement elastic membrane (218) is formed of a material that is elastic and expandable when the piston (213) moves forward and backward. The above-mentioned replacement elastic membrane (218) is formed of a material that is elastic and expandable so that it is extended forward by the piston (213) when the piston (213) moves forward, and is restored when the piston (213) moves backward. In this embodiment, the above-mentioned replacement elastic membrane (218) is described as being a rubber membrane.

[0144] Meanwhile, the above detachable means (160) is configured so that the user can detach or attach the nozzle (30) by pressing or releasing the button (161).

[0145] The above button (161) is installed so as to protrude outward from the outer surface of the main body (20) and be pressable inward.

[0146] The button (161) is mounted on the main body (20), and a button mounting groove is formed so as to be movable inward.

[0147] The above hook (162) is formed at the end of the button (161) and protrudes in a direction toward the nozzle (30), and is coupled to the hook coupling groove (163) of the nozzle (30).

[0148] The hook coupling groove (163) is formed on the surface facing the main body (20) from the nozzle (30). The hook coupling groove (163) is formed to be larger than the hook (162), so that the hook (162) is inserted while the button (161) is pressed, and a catch is formed so that the hook (162) is caught when the button (161) is released.

[0149] Additionally, the detachable means (160) may further include a coupling projection (164) formed protruding toward the main body (20) from the surface facing the main body (20) from the nozzle (30), and a coupling groove (165) formed on the main body (20) to allow the coupling projection (164) to be inserted.

[0150] In this embodiment, the detachable means (160) is described as an example in which a user presses or releases the push button (161) to detach or attach the nozzle (30), but is not limited thereto and any of the detachable means of the first to fifth embodiments may be applied.

[0151] The method for attaching and detaching the nozzle of a needleless syringe according to the 6th embodiment of the present invention configured as described above is as follows.

[0152] When the nozzle (30) is connected to the main body (20), if the user presses the button (161), the button (161) moves inward so that the connection between the hook (162) and the hook connection groove (163) is released.

[0153] When the nozzle (30) is pulled away from the main body (20) while the button (161) is pressed, the coupling projection (164) is separated from the coupling groove (165), and the nozzle (30) can be separated from the main body (20).

[0154] At this time, the replacement elastic membrane (218) fixedly installed on the nozzle (30) is also detached.

[0155] Afterwards, a new nozzle can be attached to the main body (20).

[0156] As described above, in the sixth embodiment of the present invention, the fixed elastic membrane (217) is provided at the end of the piston (213), and the replacement elastic membrane (218) corresponding to the fixed elastic membrane (217) is provided inside the nozzle (30), so that even if the piston (213) pressurizes the drug while advancing to the drug receiving portion (30a) of the nozzle (30), the drug cannot be directly adhered to the piston (213) and the fixed elastic membrane (217).

[0157] Therefore, if only the nozzle (30) is replaced, the main body (20) and the piston (213) can be reused repeatedly.

[0158] FIG. 12 is a schematic cross-sectional view showing a sealing member of a needleless syringe according to the seventh embodiment of the present invention. FIG. 13 is a schematic cross-sectional view showing the state in which the nozzle and the replacement piston are separated from the main body shown in FIG. 12.

[0159] Referring to FIGS. 12 and 13, the needleless syringe according to the seventh embodiment of the present invention differs from the sixth embodiment in that the sealing member is detachably coupled to the end of the piston (271) and the replacement piston (272) is disposed within the drug receiving portion (30a). Since the remaining configuration and operation are similar to the first embodiment, a detailed description of the similar configuration is omitted, and the differences are described in detail.

[0160] The above replacement piston (272) is screw-coupled to the end of the piston (271) and is placed within the drug receiving portion (30a). An O-ring or the like may be provided for sealing between the outer surface of the replacement piston (272) and the drug receiving portion (30a).

[0161] The above-mentioned replacement piston (272) has a protruding screw coupling portion (272a) with male threads formed thereon, and the above-mentioned piston (271) has a screw coupling groove (271a) with female threads formed thereon so that the screw coupling portion (272a) can be screw-coupled thereto.

[0162] The above replacement piston (272) can move forward and backward within the drug receiving section (30a) in conjunction with the piston (271) when the piston (271) moves forward and backward. The above replacement piston (272) directly pressurizes the drug contained within the drug receiving section (30a).

[0163] The needleless syringe configured as described above can separate the nozzle (30) from the main body (20) first, and then separate the replacement piston (272) from the piston (271).

[0164] Therefore, it is possible to prevent the drug from adhering directly to the piston (271).

[0165] In the seventh embodiment of the present invention, the attachment / detachment means comprises a push button (161), a hook (162), a hook coupling groove (163), a coupling projection (164), and a coupling groove (165). Although the user is described as separating or coupling the nozzle (30) by pressing or releasing the push button (161), the method is not limited thereto, and any of the attachment / detachment means of the first to fifth embodiments may be applied.

[0166] FIG. 14 is a cross-sectional view schematically showing a sealing member of a needleless syringe according to the eighth embodiment of the present invention.

[0167] Referring to FIG. 14, the needleless syringe according to the eighth embodiment of the present invention is a replacement piston (282) disposed within the drug receiving portion (30a) and in which a sealing member is detachably coupled to the end of the piston (281). The replacement piston (282) is inserted into and coupled to the piston (281), which is different from the seventh embodiment. Since the remaining configuration and operation are similar to the first embodiment, a detailed description of the similar configuration is omitted, and the differences are described in detail.

[0168] The above-mentioned replacement piston (282) includes an expansion portion (282a) formed such that its cross-sectional area expands as it moves toward the drug receiving portion, and an insertion portion (282b) that extends from the expansion portion (282) and is inserted into a coupling groove (281a) formed in the piston (281).

[0169] The above replacement piston (282) can move forward and backward within the drug receiving section (30a) in conjunction with the piston (281) when the piston (281) moves forward and backward. The above replacement piston (282) directly pressurizes the drug contained within the drug receiving section (30a).

[0170] The needleless syringe configured as described above can separate the nozzle (30) from the main body (20) first, and then separate the replacement piston (282) from the piston (281).

[0171] The above replacement piston (282) has a simple structure and can be sealed between the drug receiving portion (30a), and by directly pressurizing the drug, it is possible to prevent the drug from adhering directly to the piston (271).

[0172] In the eighth embodiment of the present invention, the attachment / detachment means comprises a push button (161), a hook (162), a hook coupling groove (163), a coupling projection (164), and a coupling groove (165). Although the user is described as separating or coupling the nozzle (30) by pressing or releasing the push button (161), the method is not limited thereto, and any of the attachment / detachment means of the first to fifth embodiments may be applied.

[0173] FIG. 15 is a schematic perspective view of a needleless syringe according to the ninth embodiment of the present invention. FIG. 16 is a schematic perspective view of the needleless syringe shown in FIG. 15 with the drug ampoule separated.

[0174] Referring to FIGS. 15 and 16, the needleless syringe according to the ninth embodiment of the present invention differs from the first embodiment in that a drug ampoule (60) is mounted on an ampoule mounting portion (20b) formed on the outer surface of the main body (20), and an ampoule cover (61) is installed on the ampoule mounting portion (20b). Since the remaining configuration and operation are similar to the first embodiment, a detailed description of the similar configuration is omitted, and the differences are described in detail.

[0175] The above drug ampoule (60) can be formed in various shapes such as a syringe, a refill container, and a refill pouch, and any of them can be applied as long as they are equipped with an injection port that can inject the drug into the drug receiving portion (30a).

[0176] The ampoule mounting portion (20b) is described as a groove formed concavely on the upper side of the outer surface of the main body (20) so that the drug ampoule (60) is fitted therein.

[0177] A first drug supply hole is formed inside the main body (20) to which the injection port (60a) of the drug ampoule (60) coupled to the ampoule mounting part (20b) is fitted, and a second drug supply hole communicating with the first drug injection hole may be formed in the drug receiving part (30a).

[0178] The ampoule cover (61) is rotatably installed on the ampoule mounting portion (20b) and is formed to cover at least a portion of the drug ampoule (60).

[0179] Accordingly, the ampoule cover (61) can be opened when attaching or detaching the drug ampoule (60), and after attaching the drug ampoule (60), it covers the drug ampoule (60) to prevent the drug ampoule (60) from coming out.

[0180] The ampoule mounting portion (20b) and ampoule cover (61) of the needleless syringe according to the ninth embodiment of the present invention are applicable to all of the first to eighth embodiments.

[0181] FIG. 17 is a schematic perspective view of a needleless syringe according to the 10th embodiment of the present invention. FIG. 18 is a schematic cross-sectional view of the configuration of the nozzle of the needleless syringe shown in FIG. 17.

[0182] Referring to FIGS. 17 and 18, the needleless syringe according to the 10th embodiment of the present invention is different from the 6th embodiment in that it includes a replacement piston (300) in which a sealing member is provided to move forward and backward inside the nozzle (30), and an elastic member (310) for the replacement piston provided between the nozzle (30) and the replacement piston (300) to provide elastic force in the direction in which the replacement piston (300) moves backward. Since the remaining configuration and operation are similar to the 6th embodiment, a detailed description of the similar configuration is omitted, and the differences are described in detail.

[0183] The above replacement piston (300) serves to seal the space between the main body (20) and the nozzle (30). The replacement piston (300) is provided separately from the piston (213) and is positioned inside the nozzle (30), so that it is separated together with the nozzle (30) when the nozzle (30) is separated from the main body (20).

[0184] The above replacement piston (300) can pressurize and move forward when the piston (213) moves forward, thereby pressurizing the drug.

[0185] A guide projection (301) is formed protruding from the outer surface of the above-mentioned replacement piston (300), and a guide groove (302) is formed on the inner surface of the above-mentioned nozzle (30) to which the guide projection (301) is inserted and to guide the movement of the guide projection (301).

[0186] The elastic member (310) for the replacement piston is a spring provided between the guide groove (302) and the guide projection (301) to provide elastic force so that the replacement piston (300) moves backward when the piston (213) moves backward.

[0187] Since the above replacement piston (300) is separated together with the nozzle (30) when the nozzle (30) is separated from the main body (20), the task of separating it from the piston (213) can be omitted.

[0188] In addition, the 10th embodiment of the present invention is described as an example in which an ampoule mounting portion (320) is formed on the outer surface of the nozzle (30) to which a drug ampoule (60) is mounted. A drug supply hole (321) communicating with the drug receiving portion (30a) is formed inside the ampoule mounting portion (320). However, it is not limited thereto, and it is also possible to apply the ampoule mounting portion of the 9th embodiment.

[0189] In addition, in the 10th embodiment of the present invention, the ampoule mounting portion (320) is formed protruding outwardly on the outer surface of the nozzle (30), and the main body (20) is formed with a fastening hole (330) so that the ampoule mounting portion (320) is inserted axially and caught in the circumferential direction.

[0190] Accordingly, when the nozzle (30) is inserted into the open front of the main body (20), the ampoule mounting part (320) is fitted into the fastening hole (330), so that the nozzle (30) and the main body (20) can be detachably coupled.

[0191] However, it is not limited thereto, and it is also possible to apply the attachment / detachment means of the first to fifth embodiments above.

[0192] Meanwhile, FIG. 19 is a schematic perspective view of a needleless syringe according to the eleventh embodiment of the present invention. FIG. 20 is a schematic side view showing the nozzle of the needleless syringe shown in FIG. 19 in a rotated state. FIG. 21 is a side view showing the nozzle of the needleless syringe shown in FIG. 20 in a separated state.

[0193] Referring to FIGS. 19 to 21, the attachment / detachment means (500) of the needleless syringe according to the 11th embodiment of the present invention includes a coupling pin (510) formed on the nozzle (30) and a coupling groove (520) formed on the main body (20) to be coupled after the coupling pin (510) slides. The coupling groove (520) is different from the 1st embodiment in that it includes an axial guide groove (521) and a rotational coupling groove (522). Since the remaining configuration and operation are similar to the 1st embodiment, the different configuration will be described in detail.

[0194] The coupling pin (510) is provided to protrude from the outer surface of the nozzle (30). The coupling pin (510) may be screw-coupled to the nozzle (30) so as to be detachably attached. A plurality of coupling pins (510) may be formed at positions spaced apart from each other at a predetermined distance on the outer surface of the nozzle (30). In this embodiment, two coupling pins (510) are formed, as an example.

[0195] The coupling groove (520) is formed on the side of the main body (20) and is formed in a bent shape so that the coupling pin (510) is inserted in the axial direction of the main body (20) and then inserted in the rotational direction of the nozzle (30). That is, the coupling groove (520) is described as being formed in an L-shape.

[0196] The above coupling groove (520) includes the axial guide groove (521) and the rotational guide groove (522).

[0197] The above-mentioned axial guide groove (521) is formed on the side of the main body (20) and is a groove formed long in the axial direction so that when the nozzle (30) is inserted into the interior of the main body (20) in the axial direction, the coupling pin (510) can slide in the axial direction. The cross-sectional area of ​​the above-mentioned axial guide groove (521) is formed to be constant. The width of the above-mentioned axial guide groove (521) may be formed to be equal to or larger than the diameter of the coupling pin (520).

[0198] The rotational coupling groove (522) is formed on the side of the main body (20) and communicates with the axial guide groove (521), and is formed as a groove extending in the rotational direction of the nozzle (30) perpendicular to the axial direction. The rotational coupling groove (522) is formed so that when the nozzle (30) inserted into the interior of the main body (20) is rotated, the coupling pin (510) slides in the rotational direction and then engages.

[0199] The cross-sectional area of ​​the rotational coupling groove (522) is formed in a non-uniform manner. That is, the rotational coupling groove (522) includes a first width (W1) that is connected to the axial guide groove (521) and is smaller than the diameter (D) of the coupling pin (510) to prevent the coupling pin (510) from coming off, and a seating portion (522b) that is connected to the first width (W1) and is formed with a second width (W2) that is larger than the first width (W1) to allow the coupling pin (510) to be seated. That is, the first width (W1) of the first width (W1) of the first width (522a) is formed to be smaller than the diameter (D) of the coupling pin (510). The second width (W2) of the above-mentioned seating portion (522b) is formed to be larger than the first width (W1) and equal to or larger than the diameter (D) of the coupling pin (510).

[0200] The first width (W1) of the above-mentioned anti-detachment part (522a) is formed to be smaller than the diameter of the coupling pin (510), so that the coupling pin (510) can pass through the above-mentioned anti-detachment part (522a) only when the user applies a force greater than a predetermined amount.

[0201] As described above, in this embodiment, the width of the rotational coupling groove (522) is formed differently depending on the position, thereby preventing the coupling pin (510) from detaching in the direction toward the axial guide groove (521) while the nozzle (30) is coupled to the main body (20). However, this is not limited thereto, and it is also possible to form a stopper (not shown), etc., on the inner surface of the rotational coupling groove (522).

[0202] The method of separating the nozzle (30) from the main body (20) in the needleless syringe according to the 11th embodiment of the present invention configured as above is described as follows.

[0203] FIG. 19 shows the state in which the nozzle (30) is coupled to the main body (20).

[0204] Referring to FIG. 19, when the nozzle (30) is coupled to the main body (20) and the nozzle (30) is rotated to the right, the coupling pin (510) slides along the rotational coupling groove (522).

[0205] At this time, the coupling pin (510) can pass through the anti-detachment part (522a) by the force with which the user rotates the nozzle (30).

[0206] Referring to FIGS. 20 and 21, when the coupling pin (510) passes through the anti-detachment part (522a) and is positioned in the axial guide groove (521), the nozzle (30) is pulled from the main body (20).

[0207] When the nozzle (30) is pulled from the main body (20), the coupling pin (510) slides along the axial guide groove (521) and can be separated from the axial guide groove (521).

[0208] Therefore, the nozzle (30) can be separated from the main body (20).

[0209] Meanwhile, the method of attaching the nozzle (30) to the main body (20) is described as follows.

[0210] The nozzle (30) is inserted into the interior of the main body (20), and the coupling pin (510) is inserted into the axial guide groove (521).

[0211] After inserting the coupling pin (510) into the axial guide groove (521), the nozzle (30) is rotated to the left.

[0212] When the nozzle (30) is rotated, the coupling pin (510) slides along the rotational coupling groove (522) and is secured by being seated on the seating portion (522b) of the rotational coupling groove (522).

[0213] At this time, the coupling pin (510) can pass through the anti-detachment part (522a) and be positioned on the seating part (522b) by the force of the user rotating the nozzle (30).

[0214] After the nozzle (30) is coupled to the main body (20), the coupling pin (510) cannot pass through the detachment prevention part (522a) even if vibration or shock occurs in the driving force generating part.

[0215] Therefore, the connection between the nozzle (30) and the main body (20) can be maintained more easily and more firmly.

[0216] Meanwhile, the needleless syringe equipped with a detachable means according to the 11th embodiment of the present invention may utilize the configuration of the driving force generating part of the 6th embodiment, the sealing member of the 7th and 8th embodiments, the ampoule mounting part of the 9th embodiment, and the nozzle part of the 10th embodiment.

[0217] The present invention has been described with reference to the embodiments illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims. Explanation of the symbols

[0218] 20: Main body 30: Nozzle 30a: Drug receiving section 30b: Spray channel 40: Nozzle cap 50: Driving force generating part 51: Pressure chamber 52: Laser generator 60: Drug ampoule 61: Ampoule cover 70: Sealing member 71: Fixed elastic membrane 72: Replacement elastic membrane 100.120.130.140.150: Means of attachment / detachment 210: Driving force generating unit 211: Solenoid coil 212: Kinematic magnet 213: Piston 214: Elastic member for kinetic magnetic material 220: Sealing member 217 Fixed elastic membrane 218: Replacement elastic membrane 272,282,300: Replacement piston 310: Elastic member for replacement piston

Claims

Claim 1 A needleless syringe for spraying a drug, comprising: a main body equipped with a driving force generating unit for generating a repetitive driving force for spraying the drug; a nozzle detachably coupled to the main body and equipped with a drug receiving unit for receiving the drug, which repeatedly sprays the drug contained in the drug receiving unit to the outside by the driving force; a detachable means for separating the nozzle from the main body or coupling the nozzle to the main body so that, during a procedure, an operator can separate and replace the nozzle from the main body; a piston disposed in the main body and pressurizing and spraying the drug contained in the drug receiving unit; and a sealing member formed of a retractable material that is positioned between the piston and the drug receiving unit to prevent the drug contained in the drug receiving unit from leaking to the driving force generating unit, and which is formed to extend forward by the piston when the piston moves forward and is restored when the piston moves backward. Claim 2 A nozzle-replaceable needleless syringe according to claim 1, wherein the nozzle is detachably coupled in the axial direction of the main body. Claim 3 A nozzle-replaceable needleless syringe according to claim 1, further comprising a drug ampoule formed to supply a drug to a drug supply hole formed in the drug receiving portion, which is detachably coupled to an ampoule mounting portion formed on the outer surface of either the main body or the nozzle. Claim 4 A nozzle-replaceable needleless syringe according to claim 3, further comprising an ampoule cover installed to allow the ampoule mounting portion to be opened and closed. Claim 5 A nozzle-replaceable needleless syringe according to claim 1, wherein the driving force generating unit further comprises a solenoid coil and a moving magnetic body that moves forward by a magnetic force generated when current is applied to the solenoid coil and applies an impact force to the piston, and which repeatedly supplies and cuts off current to the solenoid coil. Claim 6 In claim 1, the sealing member is a nozzle-replaceable needleless syringe fixed to a cover holder provided on the inner circumference of the drug receiving portion. Claim 7 A nozzle-replaceable needleless syringe according to claim 1, wherein the detachable means comprises: a plurality of coupling pieces, one end of which is fixed to the main body and the other end of which is formed to elastically spread toward the outer direction of the main body and has a hook formed at the other end; a hollow slider formed to be slidably movable in the axial direction on the outer surface of the main body, which presses the coupling pieces toward the inner direction of the main body when moving forward and releases the pressure on the coupling pieces when moving backward; and a hook coupling groove formed on the outer surface of the nozzle, which engages with the hook of the coupling pieces when the slider presses the coupling pieces, thereby inserting the nozzle into a nozzle insertion opening formed in the main body when the slider moves backward and engaging the hook with the hook coupling groove when the slider moves forward. Claim 8 A nozzle-replaceable needleless syringe according to claim 1, wherein the detachable means comprises a button installed on the outer circumference of the main body so as to be pressable toward the inside, a hook connected to the button and protruding toward the nozzle, and a hook coupling groove formed in the nozzle such that the hook is inserted when the button is pressed and the hook is engaged and coupled when the button is released. Claim 9 A nozzle-replaceable needleless syringe according to claim 1, wherein the detachable means further comprises a coupling projection formed protruding toward the main body from a surface facing the main body from the nozzle, and a coupling groove formed in the main body to press-fit the coupling projection. Claim 10 A nozzle-replaceable needleless syringe according to claim 1, wherein the detachable means comprises: a pivot groove formed on the outer circumference of a nozzle insertion opening formed on the front surface of the main body; and a pivot projection protruding outwardly from the outer circumference of the nozzle, which is inserted into the pivot groove when the nozzle is inserted into the nozzle insertion opening and engages with the nozzle insertion opening when the nozzle is rotated, thereby engaging the nozzle after inserting the nozzle into the nozzle insertion opening. Claim 11 A nozzle-replaceable needleless syringe according to claim 1, wherein the detachable means comprises: a coupling piece rotatably coupled to the main body and formed to open toward the outer direction of the main body when grasped and pressed, and having a hook formed at its end; an elastic member provided between the main body and the coupling piece to restore the coupling piece to its original position; and a hook coupling groove formed on the outer surface of the nozzle to engage and engage the hook. Claim 12 In claim 1, the detachable means comprises a guide projection formed protruding outwardly on the outer surface of the main body, a coupling groove formed on the outer surface of the nozzle, a rotating shaft inserted into the coupling groove, a widthwise moving slit formed long in the widthwise direction at a position spaced by a set distance in the lengthwise direction from the rotating shaft so that the guide projection is inserted and can move in the widthwise direction, and a lengthwise moving slit extended in the lengthwise direction from the widthwise moving slit so that the guide projection can move in the lengthwise direction, and a coupling rotating lever comprising the guide projection rotating lever rotates around the rotating shaft and varies the distance between the guide projection and the rotating shaft according to the rotation angle to coupling the nozzle while pressing it against the front surface of the main body. Claim 13 A nozzle-replaceable needleless syringe according to claim 1, wherein the detachable means comprises: a coupling pin formed protruding from the outer surface of the nozzle; an axial guide groove formed on the side of the main body and extending in the axial direction so that the coupling pin can slide axially when the nozzle is inserted axially into the interior of the main body; and a rotational coupling groove formed on the side of the main body that communicates with the axial guide groove and extends in the rotational direction of the nozzle perpendicular to the axial direction, so that when the nozzle inserted into the interior of the main body is rotated, the coupling pin slides axially and then engages. Claim 14 A needleless syringe with a replaceable nozzle according to claim 13, wherein the rotational coupling groove is formed with a width smaller than the diameter of the coupling pin, and includes a detachment prevention part that prevents the coupling pin from detaching. Claim 15 A replaceable nozzle for a needleless syringe that sprays a drug, comprising: a main body equipped with a driving force generating unit that generates a repetitive driving force for spraying the drug, which is detachably coupled to the main body and includes a drug receiving unit that receives the drug, wherein the drug received in the drug receiving unit is repeatedly sprayed outward by the driving force, and wherein, during a procedure, the nozzle is separated from the main body or coupled to the main body by means of a detachable means so that the nozzle can be separated from the main body or the nozzle is coupled to the main body, wherein the nozzle is positioned between the main body and the drug receiving unit and a piston that pressurizes and sprays the drug within the drug receiving unit, and wherein the sealing member is formed of an elastic material that prevents the drug received in the drug receiving unit from leaking to the driving force generating unit, and extends forward by the piston when the piston moves forward and returns to its original state when the piston moves backward. Claim 16 A replaceable nozzle for a needleless syringe that sprays a drug, wherein the nozzle is detachably coupled to a main body equipped with a driving force generating part that generates a repetitive driving force for spraying the drug, and the nozzle is detachably coupled to the main body and includes a drug receiving part that receives the drug, so as to repeatedly spray the drug received in the drug receiving part to the outside by the driving force, and wherein, during a procedure, the nozzle is detached from the main body or coupled to the main body by means of a detachable means so that the operator can detach and replace the nozzle from the main body, and the nozzle is detachably coupled in the axial direction of the main body. Claim 17 delete Claim 18 delete Claim 19 delete Claim 20 delete Claim 21 delete Claim 22 delete Claim 23 delete Claim 24 delete

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