Needle-free injection system with adjustable drug injection performance

Abstract

The present invention has an advantage of being more convenient since it is configured to allow a user to adjust injection performance including drug injection mode, injection amount, injection depth, and injection speed. In addition, the convenience is improved since the user can set the desired injection performance through a user interface. In addition, the user can adjust the number of output pulses, period, amplitude, output time, and output off time of the pulse applied to the solenoid coil to adjust the drug injection performance desired by the user.

Description

[Technical Field]

[0001] The present invention relates to a needle-free injection system, and more particularly to a needle-free injection system capable of adjusting injection performance, including drug injection mode, injection amount, injection depth, and injection frequency. [Background technology]

[0002] Generally, a syringe is an instrument used to inject medicinal liquids into the tissues of living organisms. A syringe consists of a needle that is inserted into the body, a syringe barrel that contains the medicinal liquid, and a piston that reciprocates inside the syringe barrel to push the medicinal liquid through the needle. The needle has a hole through which the medicinal liquid is injected.

[0003] Recently, there has been active research and development into needle-free syringes in order to eliminate fear of needles and prevent needle-related infections.

[0004] However, conventional needleless injectors are designed to inject a predetermined amount of medication into only one spot on the skin at a time, which may result in damage to the skin tissue.

[0005] Furthermore, since it is inconvenient to recharge after one injection, it is not suitable for use in the field of skin beauty where drugs cannot be injected uniformly multiple times over a large area of ​​skin. Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE INVENTION An object of the present invention is to provide a needleless injection system that allows a user to inject while adjusting the drug injection performance, thereby improving convenience. [Means for solving the problem]

[0007] The needleless injection system capable of adjusting drug injection performance according to the present invention comprises a solenoid coil wound around the outer periphery of a body; a cylinder coupled to the open front surface of the body so as to be in communication with the body; a drug receiving portion formed on the inner surface of the front side of the cylinder and receiving a drug injected from the outside; a nozzle portion provided on the front side of the cylinder and configured to discharge the drug received in the drug receiving portion to the front side; a moving magnetic body provided inside the body and moving forward by a magnetic force generated when power is supplied to the solenoid coil; and a moving magnetic body provided inside the cylinder and moving forward by a magnetic force generated when power is supplied to the solenoid coil. a piston that moves forward by the impact force applied by the moving magnetic body and pressurizes the drug in the drug storage portion; a pulse generator that applies pulses to the solenoid coil; a user interface that allows a user to set injection performance including at least one of an injection mode, an injection amount, an injection depth, and an injection speed of the drug that is discharged through the nozzle portion and injected into the skin; and a pulse output number (N), a pulse period (T), a pulse amplitude (Amplitude), a pulse output time (t on ) and the output off time (t off ) to control the injection performance.

[0008] The user interface displays the drug injection mode by dividing it into a single-shot mode in which the drug is injected once, a burst mode in which the drug is injected a set number of times, and a continuous mode in which the drug is injected and stopped continuously, and allows the user to select and set it.

[0009] The control unit sets the number of pulse outputs to one if the single-shot mode is set through the user interface, adjusts the amplitude of the pulse according to the injection depth of the drug set through the user interface, and adjusts the pulse output time (t on ) to adjust the

[0010] When the injection mode is set through the user interface, the control unit sets the number of pulse output times to the set number, adjusts the amplitude of the pulse according to the injection depth of the drug set through the user interface, and adjusts the pulse output time (t on ) is adjusted, and the pulse period is adjusted according to the infusion rate of the drug, and the pulse output time (t on ) minus the pulse output off time (t off ) to set the

[0011] When the continuous shooting mode is set through the user interface, the control unit adjusts the amplitude of the pulse according to the injection depth of the drug set through the user interface, and adjusts the output time (t on ) is adjusted, and the pulse period is adjusted according to the infusion rate of the drug, and the pulse output time (t on ) minus the pulse output off time (t off ) to set the

[0012] The user interface allows the user to increase or decrease the injection amount of the drug within a set range, and the control unit adjusts the pulse output time (t on ) to increase

[0013] The user interface divides the injection depth of the drug into a plurality of levels at set depth intervals, and allows the user to select and set any one of the levels. The control unit increases the amplitude of the pulse as the injection depth of the drug set through the user interface becomes deeper.

[0014] The user interface displays the drug infusion rate in infusions per second and allows the user to increase or decrease it to set it. The control unit decreases the pulse period and adjusts the pulse output off time (t off ) to reduce

[0015] The user interface includes a selection unit that allows the user to select the injection mode, the injection amount, the injection depth, and the injection rate, respectively, and a display unit that displays the injection mode, the injection amount, the injection depth, and the injection rate selected by the user, respectively.

[0016] The user interface includes a terminal capable of wired or wireless communication with the control unit.

[0017] The actuator further includes a piston elastic member provided inside at least one of the body and the cylinder, and applying an elastic force to the piston in a direction in which the piston retracts when the supply of current to the solenoid coil is cut off.

[0018] The device further includes a nozzle portion opening / closing valve that is configured to open and close a communication hole between the nozzle portion and the drug containing portion, and that is pressed by hydraulic pressure applied to the drug from the drug containing portion when the piston moves forward to open the communication hole, and that elastically restores to its original state when the hydraulic pressure is released to close the communication hole.

[0019] The solenoid coil further includes a cooling chamber disposed outside the body to surround the outside of the solenoid coil and to absorb and cool heat generated in the solenoid coil through a cooling fluid.

[0020] According to another aspect of the present invention, a needleless injection system capable of adjusting drug injection performance includes a solenoid coil wound around the outer periphery of a body; a cylinder coupled to communicate with the open front surface of the body; a drug reservoir formed on the inner surface of the front side of the cylinder and configured to receive a drug injected from the outside; a nozzle provided at the front side of the cylinder and configured to discharge the drug contained in the drug reservoir to the front side; a moving magnetic body provided inside the body and moving forward by a magnetic force generated when power is supplied to the solenoid coil; a piston provided inside the cylinder and moving forward by an impact force applied by the moving magnetic body when the moving magnetic body moves forward, thereby pressurizing the drug in the drug reservoir; and a piston for opening and closing a communication hole between the nozzle and the drug reservoir, the piston being configured to move forward and backward. a nozzle part opening / closing valve that is pushed by hydraulic pressure applied to the drug from the drug storage part when activated to open the communication hole and elastically restores to its original state when the hydraulic pressure is released to close the communication hole; a cooling chamber that is provided outside the body to surround the outside of the solenoid coil and absorbs heat generated in the solenoid coil through a cooling fluid to cool it; a pulse generator that applies pulses to the solenoid coil; a user interface that allows a user to set injection performance including at least one of an injection mode, an injection amount, an injection depth, and an injection speed of the drug that is discharged through the nozzle part and injected into the skin; and a user interface that allows a user to set the number of pulse outputs (N), a pulse period (T), a pulse amplitude, a pulse output time (t on ) and the output off time (t off) to control the injection performance, and the user interface displays the drug injection mode as a single shot mode for injecting a drug once, a burst mode for injecting a drug according to a set number of times, and a continuous shot mode for continuously repeating drug injection and cut-off, allowing the user to select and set the drug injection mode. If the single shot mode is set through the user interface, the control unit sets the number of pulse outputs to one, adjusts the amplitude of the pulse according to the drug injection depth set through the user interface, and adjusts the pulse output time (t on ), and if the injection mode is set through the user interface, the number of pulse outputs is set to the set number, the amplitude of the pulse is adjusted according to the injection depth of the drug set through the user interface, and the pulse output time (t on ) is adjusted, and the pulse period is adjusted according to the infusion rate of the drug, and the pulse output time (t on ) minus the pulse output off time (t off ) is set, and if the continuous shooting mode is set through the user interface, the amplitude of the pulse is adjusted according to the injection depth of the drug set through the user interface, and the output time (t on ) is adjusted, and the pulse period is adjusted according to the infusion rate of the drug, and the pulse output time (t on ) minus the pulse output off time (t off ) to set the

[0021] According to another aspect of the present invention, a needleless injection system capable of adjusting drug injection performance includes a solenoid coil wound around the outer periphery of a body; a cylinder coupled to and communicating with the open front surface of the body; a drug reservoir formed on the inner surface of the front side of the cylinder and configured to accommodate a drug injected from the outside; a nozzle portion provided at the front side of the cylinder and configured to expel the drug accommodated in the drug reservoir to the front; a piston provided inside the body and moving forward by a magnetic force generated when power is supplied to the solenoid coil to pressurize the drug in the drug reservoir; a pulse generator applying pulses to the solenoid coil; a user interface allowing a user to set injection performance including at least one of an injection mode, injection amount, injection depth, and injection speed of the drug expelled through the nozzle portion and injected into the skin; and a pulse output number (N), pulse period, pulse amplitude, pulse output time (t), and the like, of pulses applied from the pulse generator to the solenoid coil according to the injection performance set through the user interface. on ) and the output off time (t off ) to control the injection performance.

[0022] According to another aspect of the present invention, there is provided a needle-free injection system capable of adjusting drug injection performance, comprising: a drug reservoir that accommodates an externally injected drug; a nozzle configured to expel the drug accommodated in the drug reservoir to the front; a piston that repeatedly moves forward and backward to repeatedly pressurize the drug in the drug reservoir and expel the drug accommodated in the drug reservoir toward the nozzle; a solenoid mechanism including a solenoid coil that generates an electromagnetic force to advance the piston; and a pulse generator that applies pulses to the solenoid coil; and a control unit that controls the pulse generator to adjust the amount and depth of the drug expelled through the nozzle and injected into the skin.

[0023] According to another aspect of the present invention, there is provided a needle-free injection system with adjustable drug injection performance, comprising: a drug reservoir that accommodates an externally injected drug; a nozzle configured to expel the drug accommodated in the drug reservoir to the front; a piston that repeatedly advances and retreats to repeatedly pressurize the drug in the drug reservoir and expel the drug accommodated in the drug reservoir toward the nozzle; a solenoid mechanism including a solenoid coil that generates an electromagnetic force to advance the piston; and a pulse generator that applies pulses to the solenoid coil; a user interface that allows a user to set the injection amount and injection depth of the drug expelled through the nozzle and injected into the skin; and a control unit that controls the pulse generator based on setting information input to the user interface.

[0024] According to another aspect of the present invention, a needle-free injection system capable of adjusting drug injection performance includes: a cylinder having a drug reservoir formed therein for receiving a drug injected from the outside; a nozzle portion connected to the drug reservoir of the cylinder and configured to eject the drug stored in the drug reservoir forward; a drug pressurizing portion for pressurizing the drug in the drug reservoir and causing the drug to flow toward the nozzle portion; a driving portion for driving the drug pressurizing portion; a pulse generator for applying pulses to the driving portion; a user interface that allows a user to set injection performance including at least one of an injection mode, injection amount, injection depth, and injection speed of the drug ejected through the nozzle portion and injected into the skin; and a pulse output number (N), pulse period (T), pulse amplitude, pulse output time (t on ) and the output off time (t off ) to control the injection performance. [Effects of the Invention]

[0025] The present invention has the advantage of being configured to allow the user to adjust injection performance, including drug injection mode, injection amount, injection depth and injection speed, thereby providing greater convenience.

[0026] Furthermore, the user can set the desired injection performance through the user interface, which improves convenience.

[0027] Furthermore, by adjusting the number of pulses, cycle, amplitude, output time and output off time applied to the solenoid coil, the drug injection performance can be adjusted to suit the user's needs. [Brief explanation of the drawings]

[0028] [Figure 1] 10 is a view showing a state in which a piston of a needle-free syringe according to an embodiment of the present invention moves forward;

[0029] [Figure 2] 10 is a view showing a retracted state of a piston of a needle-free syringe according to an embodiment of the present invention;

[0030] [Figure 3] 1 is a block diagram illustrating a schematic configuration of a needle-free injection system capable of adjusting drug injection performance according to an embodiment of the present invention.

[0031] [Figure 4] 1 is a diagram illustrating an example of a user interface in a needle-free injection system according to an embodiment of the present invention.

[0032] [Figure 5] 10 is a diagram showing an example of a pulse waveform when the injection mode of the needle-free injection system according to an embodiment of the present invention is a single shot mode.

[0033] [Figure 6]10 is a diagram showing a first example of a pulse waveform when the injection mode of the needle-free injection system according to an embodiment of the present invention is a four-shot mode and is set to a first injection amount and a first injection rate.

[0034] [Figure 7] 10 is a diagram showing another second example of a pulse waveform when the injection mode of the needle-free injection system according to an embodiment of the present invention is set to a four-shot mode, a second injection amount, and a first injection rate.

[0035] [Figure 8] 10 is a diagram showing another third example of a pulse waveform when the injection mode of the needle-free injection system according to an embodiment of the present invention is set to a four-shot mode, a first injection amount, and a second injection rate. DETAILED DESCRIPTION OF THE INVENTION

[0036] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0037] A needle-free injection system according to an embodiment of the present invention is a system capable of adjusting the injection performance of a needle-free injector that pressurizes and injects a drug into the skin without an injection needle.

[0038] 1 and 2 are views showing a state in which a piston of a needle-free syringe according to an embodiment of the present invention moves forward and backward, respectively.

[0039] 1 and 2, a needleless syringe according to an embodiment of the present invention includes a body 10, a cylinder 20, a solenoid coil 30, a moving magnetic body 90, a piston 40, a nozzle opening / closing valve 50, an elastic member 110 for the moving magnetic body, an elastic member 120 for the piston, a blocker 70, and a cooling chamber 210.

[0040] The needleless syringe is an impact type syringe in which, when the moving magnetic body 90 moves forward due to the magnetic force generated by the solenoid coil 30, the moving magnetic body 90 collides with the piston 40, causing the piston 40 to move forward.

[0041] The body 10 is hollow and elongated in the longitudinal direction, and the front surface of the body 10 is open.

[0042] The cylinder 20 is hollow and connected to the open front surface of the body 10. A cylinder main hole 21 and a drug receiving portion 22 are formed inside the cylinder 20, and a nozzle portion 31 is provided at the front.

[0043] The cylinder main hole 21 is formed at the rear side of the inside of the cylinder 20, and at least a part of the hole is formed with a screw thread so that the front end of the body 10 can be inserted and screwed therein.

[0044] The drug reservoir 22 is formed on the inner surface of the front side of the cylinder 20 to receive the drug injected from the outside and is a hole through which the drug pressurized by the piston 40 passes. The drug reservoir 22 is formed to have a smaller cross-sectional area than the cylinder main hole 21. The cross-sectional area of ​​the drug reservoir 22 can be set depending on the amount of drug to be injected. The drug reservoir 22 is formed in a diverging nozzle shape including a narrowing portion whose cross-sectional area gradually decreases toward the front of the drug reservoir 22 and an expanding portion extending from the narrowing portion whose cross-sectional area increases again. A drug supply hole 22c is formed in the narrowing portion to supply the drug from the outside by a pressure difference generated when the piston 40 moves backward. A drug filler 25 is connected to the drug supply hole 22c.

[0045] The nozzle unit 23 is provided at the front of the cylinder 20 and has a hole formed therein for discharging the drug contained in the drug containing portion 22 to the front. The nozzle unit 23 is connected to the drug containing portion 22 and has a cross-sectional area that gradually decreases toward the front, thereby spraying the drug contained in the drug containing portion 22. The nozzle unit 23 may be integrally formed at the end of the cylinder 20 or may be replaceably formed at the end of the cylinder 20. In this embodiment, the cylinder 20 is described as having a first block in which the cylinder main hole 21 and the drug containing portion 22 are formed and a second block in which the nozzle unit 23 is formed, which are coupled to each other. However, this is not limited thereto, and the first block and the second block may be integrally formed.

[0046] The solenoid coil 30 is wound around the front side of the outer periphery of the body 10, and is a coil to which a current is applied to move the piston 40 forward. When a current is applied to the solenoid coil 30, the solenoid coil 30 generates a magnetic force in the direction in which the motion magnetic body 90 moves forward, thereby moving the motion magnetic body 90 forward.

[0047] The piston 40 is inserted longitudinally into the body 10 and the cylinder 20 and serves to push out the drug contained in the drug reservoir 22. The piston 40 is provided inside the body 10 separately from the kinematic magnetic body 90 and is inserted forward of the kinematic magnetic body 90. When the kinematic magnetic body 90 moves forward, the piston 40 moves forward due to the impact force applied by the kinematic magnetic body 90, and presses the drug in the drug reservoir 22 into the nozzle 23. A first flange 41 protruding radially is formed on the outer circumferential surface of the front portion of the piston 40 located inside the cylinder 20. The first flange 41 engages with a length adjustment blocker 72 (described later) when the piston 40 moves forward, thereby limiting the forward movement distance of the piston 40. A second flange 42 protruding radially is formed on the outer circumferential surface of the rear portion of the piston 40 located inside the body 10.

[0048] The moving magnetic body 90 is not a permanent magnet, but is made of a material that becomes temporarily magnetic due to the magnetic field generated when a current is applied to the solenoid coil 30 and loses its magnetism when the external magnetic field disappears. The moving magnetic body 90 is described as an iron core.

[0049] The elastic member 110 for the moving magnetic body is provided inside the body 10 between the moving magnetic body 90 and the piston 40 and extends in the longitudinal direction of the body 10. The elastic member 110 for the moving magnetic body applies elastic force to the moving magnetic body 110 in the direction in which the moving magnetic body 90 moves backward. The elastic member 110 for the moving magnetic body is a first coil spring that is compressed when the moving magnetic body 90 moves forward and applies elastic force to the moving magnetic body 90 in the direction in which the moving magnetic body 90 moves backward. One end of the elastic member 110 for the moving magnetic body is connected to the rear end of the piston 40, and the other end is connected to the front end of the moving magnetic body 90.

[0050] The nozzle part on-off valve 50 is provided to open and close the communication hole between the nozzle part 23 and the drug containing part 22. When the piston 40 moves forward, the nozzle part on-off valve 50 is pressed by hydraulic pressure applied by the drug contained in the drug containing part 22 to open the communication hole, and when the hydraulic pressure is released, the nozzle part on-off valve 50 elastically restores to its original state to close the communication hole.

[0051] The nozzle part on-off valve 50 includes a ball 51 provided in the communication hole and an elastic member 52 provided in the nozzle part 23 to provide elastic force to the ball in a direction toward the drug containing part 22. The ball 51 is configured to be inserted into the enlarged part. In this embodiment, the nozzle part on-off valve 50 is described as a ball valve. However, the nozzle part on-off valve 50 is not limited thereto, and various valves such as a duckbill valve, a plate check valve, and an electrically controlled valve may be used.

[0052] The piston elastic member 120 is an elastic member provided inside at least one of the body 10 and the cylinder 20, and applies elastic force to the piston 40 in a direction in which the piston 40 retreats when current supply to the solenoid coil 30 is cut off. The piston elastic member 120 will be described as including a second coil spring 121 and a third coil spring 122 coupled to the outer circumferential surface of the piston 40.

[0053] The second coil spring 121 is fitted onto the piston 40, and both ends thereof are provided between the cylinder 20 and the first flange portion 41. The second coil spring 121 is compressed by the first flange portion 41 when the piston 40 moves forward, and applies an elastic force to the first flange portion 41 in the direction in which the piston 40 moves backward when the piston 40 moves backward.

[0054] The third coil spring 122 is fitted onto the piston 40, and both ends thereof are provided between the body 10 and the second flange portion 42. The second coil spring 122 is compressed by the second flange portion 42 when the piston 40 moves forward, and applies an elastic force to the second flange portion 42 in the direction in which the piston 40 moves backward when the piston 40 moves backward.

[0055] The blocker 70 is detachably coupled between the cylinder 20 and the piston 40. The blocker 70 includes a fixed blocker 71 coupled to and fixed in the cylinder main hole 21, and a length-adjustable blocker 72 screwed to the inner circumferential surface of the fixed blocker 71 and capable of adjusting the length of the blocker coupled to the fixed blocker 71.

[0056] The fixed blocker 71 is formed in a ring shape with a female screw thread formed on the inner circumferential surface.

[0057] The length adjusting blocker 72 is formed in a ring shape with a male screw thread formed on its outer periphery. A predetermined gap is formed between the length adjusting blocker 72 and the piston 40, and the piston 40 moves forward and backward through the inside of the length adjusting blocker 72.

[0058] The cooling chamber 210 is detachably connected to the outside of the body 10 and is provided to surround the solenoid coil 30, and serves as a cooling means for cooling the heat generated from the solenoid coil 30 through a cooling fluid. A cooling fluid supply pipe 211 and a cooling fluid discharge pipe 212 are connected to the cooling chamber 210.

[0059] The cooling fluid supply pipe 211 is a flow path for supplying a cooling fluid from the outside to the cooling chamber 210. The cooling fluid discharge pipe 212 is a flow path for discharging the cooling fluid from the cooling chamber 210 to the outside. The cooling fluid supply pipe 211 and the cooling fluid discharge pipe 212 may each be provided with an on-off valve (not shown).

[0060] The cooling chamber 210 can absorb heat from the solenoid coil 30 and maintain it at a constant temperature, thereby preventing the magnetic force from being weakened due to the heat generated from the solenoid coil 30.

[0061] In this embodiment, a cooling fluid is used to cool the solenoid coil 30, and the cooling fluid is described as being water or air, but is not limited thereto, and a conduction cooling method or the like can also be used.

[0062] A piston cover (not shown) may be provided between the cylinder 20 and the piston 40. The piston cover (not shown) is fixed to the cylinder 20. The piston cover 810 is provided inside the cylinder 20 and disposed to cover the end of the piston 40. The piston cover (not shown) may be made of an expandable material so that it is stretched forward by the piston 40 when the piston 40 moves forward and restored when the piston 40 moves backward.

[0063] FIG. 3 is a block diagram illustrating a schematic configuration of a needle-free injection system capable of adjusting drug injection performance according to an embodiment of the present invention.

[0064] Referring to FIG. 3, the needle-free injection system further includes a user interface 2, a control unit 4 and a pulse generator 6.

[0065] In this embodiment, the user interface 2, the control unit 4, and the pulse generator 6 are described as being provided separately from the needle-free injector, but this is not limited thereto, and they may be provided integrally with the needle-free injector.

[0066] The user interface 2 allows a user to set the drug injection performance of the needleless syringe. The user interface 2 includes a terminal capable of wired or wireless communication with the control unit 4. The terminal may include a computer, a smartphone, a tablet PC, etc.

[0067] The drug injection performance includes at least one of drug injection mode, drug injection amount, drug injection depth, and drug injection speed.

[0068] 4, the user interface 2 includes a selection unit 2a that allows a user to select the injection mode, injection volume, injection depth, and injection speed, respectively, and a display unit 2b that displays the injection mode, injection volume, injection depth, and injection speed selected by the user. That is, the selection unit 2a includes an injection mode selection unit, an injection volume selection unit, an injection depth selection unit, and an injection speed selection unit. The user interface 2 also includes a save button that allows the user to save the injection mode, injection volume, injection depth, and injection speed input by the user.

[0069] The user interface 2 displays the drug injection mode in three different modes. That is, the injection modes include a single shot mode in which the drug is injected only once when a switch for operating the needleless syringe is turned on, a burst mode in which the drug is injected a set number of times when the switch is turned on, and a continuous shot mode in which the drug is continuously injected and stopped. A user can select and set one of the single shot mode, the burst mode, and the continuous shot mode through the injection mode selection unit.

[0070] The user interface 2 also allows the user to increase or decrease the injection amount of the drug within a set range. In this embodiment, the injection amount is described as being adjustable within a range of approximately 0.1 to 2.0 μl. The user can select and set the injection amount through the injection amount selection unit.

[0071] The user interface 2 also displays the drug injection depth divided into a plurality of levels at set depth intervals, allowing the user to select and set one of the levels. In this embodiment, the injection depth is adjustable within a range of approximately 0.2 to 5.0 mm. The user can select and set the injection depth through the injection depth selection unit.

[0072] The user interface 2 also displays the drug infusion rate in infusions per second, allowing the user to increase or decrease it. That is, the infusion rate per second is the pulse frequency, which will be described later. In this embodiment, the infusion rate is described as being approximately 1 to 30 Hz.

[0073] The pulse generator 6 applies a pulse signal to the solenoid coil 30. The pulse generator 6 is included in a power supply unit that supplies power to the solenoid coil 30 from an external power supply source (not shown).

[0074] The control unit 4 controls the injection performance by adjusting the waveform of the pulse applied to the solenoid coil according to the injection performance set through the user interface 2. That is, the control unit 4 controls the number of pulse outputs (N), the period, the pulse amplitude, the pulse output time (t on ) and the output off time (t off ) and transmits it to the pulse generator 6.

[0075] The operation of the needle-free injection system according to the embodiment of the present invention configured as above will be described as follows.

[0076] A user of the needleless injector can set the desired drug injection mode, injection volume, injection depth, and injection speed through the user interface 2. When the user sets each of the injection performances through the user interface 2, an input signal for the injection performance is transmitted to the control unit 4.

[0077] FIG. 5 is a diagram showing an example of a pulse waveform when the injection mode of the needle-free injection system according to the embodiment of the present invention is a single shot mode.

[0078] Referring to Figure 5, an example will be described in which the user sets the injection mode to the single mode through the user interface 2, sets the drug injection amount to a first injection amount, and sets the injection depth to a first level.

[0079] If the single shot mode is set, the control unit 4 sets the number of pulses (N) output when the needle-free injector is turned on to 1. That is, the number of pulses (N) output is set according to the injection mode.

[0080] Also, if the injection amount is set to the first injection amount through the user interface 2, the control unit 4 controls the pulse output time (t on ) at the first output time (t on That is, the control unit 4 sets the injection amount and the pulse output time (t on ) is stored in advance, and when the injection amount is set, the output time (t on The pulse output time is the time during which the pulse is output once with the amplitude described later. The larger the injection amount is set, the shorter the pulse output time (t on ) is set to be longer, and the smaller the injection amount, the shorter the pulse output time (t on ) is set to be short.

[0081] Furthermore, when the injection depth is set to the first injection depth through the user interface 2, the control unit 4 sets the pulse amplitude (V) to a first amplitude (V1) according to the first injection depth. That is, the control unit 4 stores data regarding the relationship between the injection depth and the pulse amplitude (V) in advance, and when the injection depth is set, the control unit 4 can derive an amplitude (V) appropriate for the set injection depth. Here, the pulse amplitude corresponds to the magnitude of the voltage. As the injection depth is set deeper, the pulse amplitude is set larger, and as the injection depth decreases, the pulse amplitude is set smaller.

[0082] In the single-shot mode, the drug is injected only once, and therefore the drug injection rate is not adjusted, i.e., the user interface 2 can deactivate the selection unit for setting the injection rate when the single-shot mode is set.

[0083] As described above, when the user sets the single shot mode and sets the injection depth and the injection amount of the drug, the control unit 4 controls the amplitude (V) of the pulse and the output time (t on ) respectively.

[0084] The pulse generator 6 generates a pulse having a first amplitude (V) and a first output time (t on 1) A pulse is generated and applied to the solenoid coil 30.

[0085] Referring to FIG. 5, in the single-shot mode, the pulse is output once, and the first output time (t on 1) and occurs as a waveform having the first amplitude (V1).

[0086] When the pulse is applied to the solenoid coil 30, the output time of the pulse (t on ) adjusts the time during which the solenoid coil 30 generates a magnetic force, and adjusts the time during which the moving magnetic body 90 collides with the piston 40.

[0087] The output time of the pulse (t on As the pulse output time increases, the collision time between the kinematic magnetic body 90 and the piston 40 becomes longer, and the time that the piston 40 moves forward becomes longer, so the ejection time of the drug becomes longer and the amount of drug injected increases. Therefore, as the pulse output time increases, the amount of drug injected increases, and as the pulse output time decreases, the amount of drug injected decreases. By increasing or decreasing the pulse output time, the user can adjust the amount of drug injected as desired.

[0088] The amplitude (V) of the pulse adjusts the magnitude of the magnetic force generated in the solenoid coil 30, and the forward speed of the kinematic magnetic body 90 is adjusted according to the magnitude of the magnetic force. As the amplitude of the pulse increases, the forward speed of the kinematic magnetic body 90 increases, and the injection depth of the drug increases. Therefore, as the amplitude of the pulse increases, the injection depth of the drug increases, and as the amplitude of the pulse decreases, the injection depth of the drug decreases. In other words, by increasing or decreasing the amplitude of the pulse, the user can adjust the injection depth of the drug as desired.

[0089] Meanwhile, FIG. 6 is a diagram showing a first example of a pulse waveform when the injection mode of the needle-free injection system according to an embodiment of the present invention is set to a four-shot mode, a first injection amount, and a first injection rate.

[0090] Referring to FIG. 6, it is explained that the user sets the injection mode to the injection mode through the user interface 2, sets the drug injection amount to a first injection amount, sets the injection depth to a first level, and sets the injection rate to a first injection rate.

[0091] When setting the injection mode, the user also sets the number of injections. For example, when setting the injection mode, the user selects one of two injections, three injections, and four injections. Hereinafter, it will be described that the four injections mode is set.

[0092] If the four-injection mode is set, the control unit 4 sets the number of pulses (N) output when the needle-free injector is switched on to 4. That is, four pulses are output when the switch is switched on once, so four injections are made with one switch operation.

[0093] Also, if the injection amount is set to the first injection amount through the user interface 2, the control unit 4 controls the pulse output time (t on) at the first output time (t on That is, the control unit 4 sets the injection amount and the pulse output time (t on ) is stored in advance, and when the injection amount is set, the output time (t on ) can be derived. on ) is the time for which the pulse is output once with the amplitude described later. The larger the injection amount is set, the shorter the pulse output time (t on ) is set to be long.

[0094] Furthermore, when the injection depth is set to the first injection depth through the user interface 2, the control unit 4 sets the pulse amplitude (V) to a first amplitude (V1) according to the first injection depth. That is, the control unit 4 stores data regarding the relationship between the injection depth and the pulse amplitude (V) in advance, and when the injection depth is set, the control unit 4 can derive an amplitude (V) appropriate for the set injection depth. Here, the pulse amplitude corresponds to the magnitude of the voltage. As the injection depth is set deeper, the pulse amplitude is set larger, and as the injection depth decreases, the pulse amplitude is set smaller.

[0095] Furthermore, if the injection rate is set to the first injection rate through the user interface 2, the control unit 4 sets the pulse period (T) according to the first injection rate. Here, since the injection rate is the number of injections per second, the pulse period (T) is set to the reciprocal of the injection rate. For example, if the injection rate is set to 10, the pulse period (T) may be set to 1 / 10.

[0096] The control unit 4 sets the pulse period (T) according to the injection rate, and defines the remaining time excluding the pulse output time (t o n ) in the pulse period (T) as an output off time (t off ) where the pulse output off time (t off ) is the first output off time (toff 1) was set.

[0097] When the injection rate is set, the control unit 4 can derive the pulse period (T) suitable for the set injection rate. Here, the injection rate is a frequency, i.e., the number of injections or injections per second. Therefore, as the pulse period is reduced, the next pulse is output more quickly after a pulse is output, increasing the number of injections per second and increasing the injection rate. Therefore, the faster the injection rate is set, the shorter the pulse period is adjusted, and the slower the injection rate is set, the longer the pulse period is adjusted. In this case, when adjusting the pulse period (T) according to the injection rate, the pulse output time (t) within the pulse period is adjusted. on ) changes depending on the injection amount, so the pulse output time (t on ) is the remaining time excluding the output off time (t off ) is adjusted.

[0098] As described above, when the user sets the injection mode and the injection depth, the injection amount, and the injection speed of the drug, the control unit 4 controls the amplitude (V) of the pulse, the output time (t on ) and the output off time of the pulse (t off ) respectively.

[0099] The pulse generator 6 outputs the pulses at the number of times, the period, the amplitude (V) of the pulses, and the output time (t on ) and the output off time of the pulse (t off ) generates a pulse, which is applied to the solenoid coil 30.

[0100] Referring to FIG. 6, in the four-times flash mode, the pulse is output four times, and the pulse is output during the first output time (t offIt can be seen that the waveform is not output during 1) and is generated with the first amplitude (V1).

[0101] When the pulse is applied to the solenoid coil 30, the time during which the solenoid coil 30 generates a magnetic force is adjusted depending on the output time of the pulse, and the collision time during which the moving magnetic body 90 collides with the piston 40 is adjusted.

[0102] The output time of the pulse (t on As the pulse output time increases, the collision time between the kinematic magnetic body 90 and the piston 40 becomes longer, and the time that the piston 40 moves forward becomes longer, so the ejection time of the drug becomes longer and the amount of drug injected increases. Therefore, as the pulse output time increases, the amount of drug injected increases, and as the pulse output time decreases, the amount of drug injected decreases. By increasing or decreasing the pulse output time, the user can adjust the amount of drug injected as desired.

[0103] The amplitude (V) of the pulse adjusts the magnitude of the magnetic force generated in the solenoid coil 30, and the forward speed of the kinematic magnetic body 90 is adjusted according to the magnitude of the magnetic force. As the amplitude of the pulse increases, the forward speed of the kinematic magnetic body 90 increases, and the injection depth of the drug increases. Therefore, as the amplitude of the pulse increases, the injection depth of the drug increases, and as the amplitude of the pulse decreases, the injection depth of the drug decreases. In other words, by increasing or decreasing the amplitude of the pulse, the user can adjust the injection depth of the drug as desired.

[0104] Meanwhile, FIG. 7 is a diagram showing another second example of a pulse waveform when the injection mode of the needle-free injection system according to an embodiment of the present invention is set to the four-shot mode, the second injection amount, and the first injection rate.

[0105] 7, the user sets the injection mode to the four-injection mode through the user interface 2, but sets the injection amount of the drug to a second injection amount greater than the first injection amount, and also sets the injection depth to a first level and the injection rate to a first injection rate.

[0106] If the four-injection mode is set, the control unit 4 sets the number of pulses output when the needle-free injector is switched on to four. That is, four pulses are output when the switch is switched on once, so four injections are made with one switch operation.

[0107] Furthermore, if the injection amount is set to a second injection amount greater than the first injection amount through the user interface 2, the control unit 4 adjusts the pulse output time (t on ) at the second output time (t on 2). Since the second injection amount is greater than the first injection amount, the output time of the pulse (t on ) is the first output time (t on The second output time (t on 2). That is, the control unit 4 sets the injection amount and the pulse output time (t on ) is stored in advance, and when the injection amount is set, the output time (t on The larger the injection amount is set, the longer the pulse output time is set.

[0108] Furthermore, when the injection depth is set to the first injection depth through the user interface 2, the control unit 4 sets the pulse amplitude (V) to a first amplitude (V1) according to the first injection depth. That is, the control unit 4 stores data regarding the relationship between the injection depth and the pulse amplitude (V) in advance, and when the injection depth is set, the control unit 4 can derive an amplitude (V) suitable for the set injection depth.

[0109] Also, if the injection rate is set to the first injection rate through the user interface 2, the control unit 4 sets the pulse period (T) according to the first injection rate.

[0110] The control unit 4 sets the pulse period (T) according to the injection rate, and determines the pulse output time (t on ) is the remaining time during which the pulse is not output (t off )

[0111] Therefore, the output off time of the pulse (t off ) is the second output time (t) of the pulse during the period (T) of the pulse. on 2), which is the remaining time excluding the second output off time (t off 2). off 2) is the first output off time (t off If the injection amount is set to a second injection amount greater than the first injection amount, the pulse output time (t on ) is the first output time (t on The second output time (t on 2), but the injection rate is the same and the pulse period (T) is the same, so the second output time (ton2) is subtracted from the pulse period (T), and the remaining time is the second output off time (t off 2) is the output off time of the pulse (t off )

[0112] When the injection rate is set, the control unit 4 can derive the pulse period (T) suitable for the set injection rate. Here, the injection rate is a frequency, i.e., the number of injections or injections per second. Therefore, as the pulse period is reduced, the next pulse is output more quickly after a pulse is output, increasing the number of injections per second and increasing the injection rate. Therefore, the faster the injection rate is set, the shorter the pulse period is adjusted, and the slower the injection rate is set, the longer the pulse period is adjusted. In this case, when adjusting the pulse period (T) according to the injection rate, the pulse output time (t) within the pulse period is adjusted. on ) changes depending on the injection amount, so the pulse output time (t on ) is the remaining time excluding the output off time (t off ) is adjusted.

[0113] As described above, when the user sets the four-times injection mode and respectively sets the injection depth, the injection amount, and the injection speed of the drug, the control unit 4 controls the amplitude (V) of the pulse, the output time (t on ) and the output off time of the pulse (t off ) respectively.

[0114] The pulse generator 6 determines the number of pulses to be output, the amplitude (V) of the pulses, and the output time (t on ) and the output off time of the pulse (t off ) generates a pulse, which is applied to the solenoid coil 30.

[0115] When the pulse is applied to the solenoid coil 30, the time during which the solenoid coil 30 generates a magnetic force is adjusted depending on the output time of the pulse, and the collision time during which the moving magnetic body 90 collides with the piston 40 is adjusted.

[0116] The output time of the pulse (ton As the pulse output time increases, the collision time between the kinematic magnetic body 90 and the piston 40 becomes longer, and the time that the piston 40 moves forward becomes longer, so the ejection time of the drug becomes longer and the amount of drug injected increases. Therefore, as the pulse output time increases, the amount of drug injected increases, and as the pulse output time decreases, the amount of drug injected decreases. By increasing or decreasing the pulse output time, the user can adjust the amount of drug injected as desired.

[0117] The amplitude (V) of the pulse adjusts the magnitude of the magnetic force generated in the solenoid coil 30, and the forward speed of the kinematic magnetic body 90 is adjusted according to the magnitude of the magnetic force. As the amplitude of the pulse increases, the forward speed of the kinematic magnetic body 90 increases, and the injection depth of the drug increases. Therefore, as the amplitude of the pulse increases, the injection depth of the drug increases, and as the amplitude of the pulse decreases, the injection depth of the drug decreases. In other words, by increasing or decreasing the amplitude of the pulse, the user can adjust the injection depth of the drug as desired.

[0118] Referring to FIG. 7, in the four-times flash mode, the pulse is output four times, and the pulses are output at the second output time (t on2 2), and the first output off time (t off It can be seen that the waveform is not output during 1) and is generated with the first amplitude (V1).

[0119] The output time of the pulse is the second output time (t on 2), the output time of the pulse (t on ) increases, the collision time between the moving magnetic body 90 and the piston 40 becomes longer, and the forward movement time of the piston 40 becomes longer, so the ejection time of the drug becomes longer and the injection amount of the drug increases. Therefore, the drug can be injected in a second injection amount that is larger than the first injection amount.

[0120] Meanwhile, FIG. 8 is a diagram showing another third example of a pulse waveform when the injection mode of the needle-free injection system according to an embodiment of the present invention is set to the four-shot mode, the first injection amount, and the second injection rate.

[0121] Referring to FIG. 8, an example will be described in which the user sets the injection mode to the four-injection mode through the user interface 2, sets the drug injection speed to a second speed faster than the first speed, sets the drug injection amount to the first injection amount, and sets the injection depth to a first level.

[0122] If the four-injection mode is set, the control unit 4 sets the number of pulses (N) output when the needle-free injector is switched on to 4. That is, four pulses are output when the switch is switched on once, so four injections are made with one switch operation.

[0123] Also, if the injection amount is set to the first injection amount through the user interface 2, the control unit 4 controls the pulse output time (t on ) at the first output time (t on That is, the control unit 4 sets the injection amount and the pulse output time (t on ) is stored in advance, and when the injection amount is set, the output time (t on ) can be derived.

[0124] Furthermore, when the injection depth is set to the first injection depth through the user interface 2, the control unit 4 sets the pulse amplitude (V) to a first amplitude (V1) according to the first injection depth. That is, the control unit 4 stores data regarding the relationship between the injection depth and the pulse amplitude (V) in advance, and when the injection depth is set, the control unit 4 can derive an amplitude (V) suitable for the set injection depth. The deeper the injection depth is set, the larger the pulse amplitude is set.

[0125] Also, if the injection rate is set to a second injection rate higher than the first injection rate through the user interface 2, the control unit 4 sets the pulse period (T') according to the second injection rate.

[0126] The control unit 4 stores data on the relationship between the injection rate and the pulse period (T) in advance, and once the injection rate is set, it can derive the pulse period (T) appropriate for the set injection rate. Here, the injection rate is the number of vibrations per second, i.e., the number of injections per second. Therefore, as the pulse period is reduced, the next pulse is output more quickly after a pulse is output, increasing the number of injections per second and increasing the injection rate. Therefore, the faster the injection rate is set, the shorter the pulse period becomes, and the slower the injection rate is set, the longer the pulse period becomes.

[0127] Since the injection rate is set to a second injection rate that is faster than the first injection rate, the period of the pulses is set to a period (T') that is shorter than the period (T) at the first injection rate.

[0128] The control unit 4 controls the first output time (t on The remaining time excluding 1) is the third output off time (t off 3). The third output off time (t off 3) is the first output off time (t off This is a shorter time than 1).

[0129] 6 and 8, the injection amount is the same as the first injection amount, and the pulse output time (t on ) is the first output time (t on 1), or the injection rates are different from each other, so the third output off time (t off 3) is the first output off time (t off It is set shorter than 1).

[0130] If the pulse output off time is shorter, the next pulse is output more quickly after the previous pulse is output, so the number of injections per second increases, and the injection speed increases. Therefore, the faster the injection speed is set, the shorter the pulse period becomes, and the slower the injection speed is set, the longer the pulse period becomes. Also, the faster the injection speed is set, the shorter the pulse output off time (t off ) is set to be shorter, and the slower the injection rate is set, the longer the pulse output off time (t off ) is set to long.

[0131] As described above, when the user sets the four-times injection mode and respectively sets the injection depth, the injection amount, and the injection speed of the drug, the control unit 4 controls the amplitude (V) of the pulse, the output time (t on ) and the output off time of the pulse (t off ) respectively.

[0132] The pulse generator 6 determines the number of pulses to be output, the amplitude (V) of the pulses, and the output time (t on ) and the output off time of the pulse (t off ) generates a pulse, which is applied to the solenoid coil 30.

[0133] Referring to FIG. 7, in the four-times flash mode, the pulse is output four times, and the pulses are output at the first output time (t on 1), and the third output off time (t off 3), it is not output during this period, but occurs in the waveform of the first amplitude (V1).

[0134] The pulse period (T') is shortened, and the output-off time of the pulse is equal to the first output-off time (t off The second output off time (t offBy setting the setting to 3), the time when the pulses are not output is shortened, and the output interval between pulses is reduced, so the number of injections of the drug per second increases, and the injection rate of the drug increases, so that the drug can be injected at a faster second injection rate.

[0135] Meanwhile, with reference to Figures 6 to 8, the pulses used to adjust the injection amount and injection speed of the drug in the droplet injection mode have been described as an example, but this is not limited thereto and can also be applied to the continuous injection mode.

[0136] Meanwhile, in the above embodiment, the nozzle portion on-off valve 50 is provided, but this is not limiting, and it is also possible to have no nozzle portion on-off valve 50. When the nozzle portion on-off valve 50 is not provided, the drug storage portion 22 is filled with a drug in advance.

[0137] In addition, in the above embodiment, the drug pressurizing unit that pressurizes the drug in the drug storage unit is a piston 40, and the driving unit that drives the drug pressurizing unit includes a solenoid coil 30.

[0138] However, the present invention is not limited to this, and the drug pressurizing unit may be any other than the piston 40 as long as it can pressurize the drug, such as an elastic membrane.

[0139] Furthermore, the driving unit is an energy source that can apply pressure to the drug pressurizing unit, such as the piston or the elastic membrane, and any device that generates a driving force in a pulsed manner when pulses are applied by the pulse generator can be used.

[0140] For example, the actuator may include a pneumatic actuator, a hydraulic actuator, a piezoelectric actuator, a spring device, or the like.

[0141] The driving unit may also include a laser beam. That is, the laser beam may be directly applied to the drug, or the laser beam may be applied to a working fluid in a separate sealed pressure chamber to generate bubbles, and the volume expansion of the bubbles generated in the working fluid may stretch the elastic membrane, thereby applying instantaneous pressure to the drug in the drug storage unit.

[0142] The driving unit may also include an electrode, and when high voltage electricity is discharged to the electrode, a spark and dielectric breakdown occur in the working fluid in a separate sealed pressure chamber, generating bubbles, and the volume expansion caused by the bubbles generated in the working fluid stretches the elastic membrane, thereby applying instantaneous pressure to the drug in the drug storage unit.

[0143] Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely illustrative, and those skilled in the art will recognize that various modifications and equivalent embodiments are possible. Therefore, the true technical scope of the present invention should be determined by the technical spirit of the claims. [Industrial Applicability]

[0144] According to the present invention, a needleless injection system can be manufactured that can adjust the drug injection performance.

Claims

1. A solenoid coil wound around the outer periphery of the body; a cylinder coupled to the open front surface of the body so as to be in communication with the body; a drug receiving portion formed on the inner surface of the front side of the cylinder, in which a drug injected from the outside is received; a nozzle portion provided on the front side of the cylinder and configured to eject the drug contained in the drug containing portion to the front side; a moving magnetic body provided inside the body, which moves forward by a magnetic force generated when power is supplied to the solenoid coil; a piston provided inside the cylinder, which pressurizes the drug in the drug storage portion by the forward movement of the moving magnetic body and the resulting impact force when the moving magnetic body moves forward; a pulse generator that applies a pulse to the solenoid coil; a user interface that allows a user to set injection performance, including an injection mode, an injection amount, and an injection depth, of the drug that is discharged through the nozzle and injected into the skin; According to the injection performance set through the user interface, the number of pulses (N), pulse period (T), pulse amplitude, pulse output time (t ｏｎ ) and the output off time (t ｏｆｆ a control unit that adjusts at least a portion of the parameters to control the injection performance; The user interface includes: The drug injection mode is displayed as a single shot mode in which the drug is injected once, a burst mode in which the drug is injected according to a set number of times, and a continuous shot mode in which the drug is injected and stopped continuously, and the user can select and set the mode. The injection depth of the drug is divided into a plurality of levels at set depth intervals, and the user selects and sets one of the levels; The control unit The needleless injection system has adjustable drug injection performance, and increases the amplitude of the pulse as the injection depth of the drug set through the user interface increases.

2. When the single-shot mode is set through the user interface, the control unit The number of pulse outputs is set to one, the amplitude of the pulse is adjusted according to the injection depth of the drug set through the user interface, and the pulse output time (t ｏｎ 2. The needle-free injection system with adjustable drug injection performance according to claim 1, wherein the needle-free injection system adjusts the injection speed.

3. When the injection mode is set through the user interface, the control unit The number of pulse outputs is set to the set number, the amplitude of the pulse is adjusted according to the injection depth of the drug set through the user interface, and the pulse output time (t ｏｎ ) is adjusted, and the pulse period is adjusted according to the infusion rate of the drug, and the pulse output time (t ｏｎ ) is the output off time (t ｏｆｆ 2. The needle-free injection system with adjustable drug injection performance according to claim 1, wherein the needle-free injection system is set to

4. When the continuous shooting mode is set through the user interface, the control unit The amplitude of the pulse is adjusted according to the injection depth of the drug set through the user interface, and the output time of the pulse (t ｏｎ ) is adjusted, and the pulse period is adjusted according to the infusion rate of the drug, and the pulse output time (t ｏｎ ) is the output off time (t ｏｆｆ 2. The needle-free injection system with adjustable drug injection performance according to claim 1, wherein the needle-free injection system is set to

5. the user interface allows a user to increase or decrease the amount of the drug to be injected within a set range; The control unit may adjust the pulse output time (t ｏｎ 2. The needle-free injection system with adjustable drug injection performance according to claim 1, wherein the needle-free injection system increases the injection rate.

6. The injection performance further includes an injection rate of the drug discharged through the nozzle portion and injected into the skin, The user interface includes: The drug infusion rate is displayed as the number of infusions per second and can be set by the user by increasing or decreasing the rate. The control unit may decrease the pulse period as the drug infusion rate set through the user interface increases, and may adjust the pulse output time (t ｏｎ ) is the output off time (t ｏｆｆ 2. The needle-free injection system with adjustable drug injection performance according to claim 1, wherein the needle-free injection system is set to

7. 2. The needle-free injection system according to claim 1, further comprising a piston elastic member disposed inside at least one of the body and the cylinder, the piston elastic member applying an elastic force to the piston in a direction in which the piston retracts when the supply of current to the solenoid coil is cut off.

8. 2. The needle-free injection system according to claim 1, further comprising a nozzle opening / closing valve configured to open and close a communication hole between the nozzle and the drug storage unit, to open the communication hole by hydraulic pressure applied to the drug when the piston moves forward, and to close the communication hole when the hydraulic pressure is released.

9. 2. The needle-free injection system according to claim 1, further comprising a cooling chamber disposed outside the body to surround the outside of the solenoid coil, and configured to absorb and cool heat generated in the solenoid coil through a cooling fluid.

10. a drug storage section for storing a drug injected from the outside; a nozzle portion formed to eject the drug contained in the drug containing portion to the front side; a piston that repeatedly moves forward and backward to repeatedly pressurize the drug in the drug storage portion and discharge the drug stored in the drug storage portion into a nozzle portion, a solenoid coil that generates an electromagnetic force to move the piston forward, and a pulse generator that applies a pulse to the solenoid coil; a user interface that allows a user to set injection performance, including an injection mode, an injection amount, and an injection depth, of the drug that is discharged through the nozzle and injected into the skin; According to the injection performance set through the user interface, the number of pulses (N), pulse period (T), pulse amplitude, pulse output time (t ｏｎ ) and the output off time (t ｏｆｆ a control unit that adjusts at least a portion of the parameters to control the injection performance; The user interface includes: The drug injection mode is displayed as a single shot mode in which the drug is injected once, a burst mode in which the drug is injected according to a set number of times, and a continuous shot mode in which the drug is injected and stopped continuously, and the user can select and set the mode. The injection depth of the drug is divided into a plurality of levels at set depth intervals, and the user selects and sets one of the levels; The control unit The needleless injection system has adjustable drug injection performance, and increases the amplitude of the pulse as the injection depth of the drug set through the user interface increases.

11. a cylinder having a drug storage section formed therein for storing a drug injected from the outside; a nozzle portion that is connected to the drug storage portion of the cylinder and is formed so as to eject the drug stored in the drug storage portion to the front; a drug pressurizing unit that pressurizes the drug in the drug storage unit and causes the drug to flow toward the nozzle unit; a driving unit that drives the drug pressurizing unit; a pulse generator that applies a pulse to the driving unit; a user interface that allows a user to set injection performance, including an injection mode, an injection amount, and an injection depth, of the drug that is discharged through the nozzle and injected into the skin; According to the injection performance set through the user interface, the number of pulses (N), pulse period (T), pulse amplitude, pulse output time (t ｏｎ ) and the output off time (t ｏｆｆ a control unit that adjusts at least a portion of the parameters to control the injection performance; The user interface includes: The drug injection mode is displayed as a single shot mode in which the drug is injected once, a burst mode in which the drug is injected according to a set number of times, and a continuous shot mode in which the drug is injected and stopped continuously, and the user can select and set the mode. The injection depth of the drug is divided into a plurality of levels at set depth intervals, and the user selects and sets one of the levels; The control unit The needleless injection system has adjustable drug injection performance, and increases the amplitude of the pulse as the injection depth of the drug set through the user interface increases.

12. When the single-shot mode is set through the user interface, the control unit The number of pulse outputs is set to one, the amplitude of the pulse is adjusted according to the injection depth of the drug set through the user interface, and the pulse output time (t ｏｎ 12. The needle-free injection system with adjustable drug injection performance according to claim 11, wherein the needle-free injection system adjusts the injection speed.

13. When the injection mode is set through the user interface, the control unit The number of pulse outputs is set to the set number, the amplitude of the pulse is adjusted according to the injection depth of the drug set through the user interface, and the pulse output time (t ｏｎ ) is adjusted, and the pulse period is adjusted according to the infusion rate of the drug, and the pulse output time (t ｏｎ ) is the output off time (t ｏｆｆ 12. The needle-free injection system with adjustable drug injection performance according to claim 11, wherein the needle-free injection system is set to

14. When the continuous shooting mode is set through the user interface, the control unit The amplitude of the pulse is adjusted according to the injection depth of the drug set through the user interface, and the output time of the pulse (t ｏｎ ) is adjusted, and the pulse period is adjusted according to the infusion rate of the drug, and the pulse output time (t ｏｎ ) is the output off time (t ｏｆｆ 12. The needle-free injection system with adjustable drug injection performance according to claim 11, wherein the needle-free injection system is set to

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