KR102335681B1 - Needleless syringe - Google Patents

Abstract

A needleless syringe according to the present invention forms a concave-convex unit in at least a part of a drug receiving unit and a nozzle unit to minimize a contact area between a drug and a surface thereof and to further increase the flow rate of the drug, thereby an enabling high-speed injection. In addition, the flow rate of the drug increases and the contact area between a ball and the surface of an opening and closing valve of the nozzle unit is reduced, and thus the ball can be more easily pushed by hydraulic pressure of the drug so that the opening of the opening and closing valve of the nozzle unit by the drug is easy.

Description

Needleless syringe

The present invention relates to a needleless syringe, and more particularly, to a needleless syringe capable of improving the injection speed of a drug without an injection needle.

In general, a syringe is a device for injecting a chemical solution into the tissue of an organism. The syringe is composed of a needle inserted into the body, a syringe in which the drug solution is accommodated, and a piston that reciprocates inside the syringe and pushes the drug solution into the needle. The needle is punctured so that the drug is injected when injected.

Recently, in order to relieve the fear of the needle of the syringe and to prevent infection due to the needle, research and development of the syringe without a needle has been active.

However, since the existing needleless syringe is configured to inject a predetermined amount of a drug into only one part of the skin at a time, damage to the skin tissue may occur.

In addition, since discomfort such as reloading after one injection follows, there is a limitation that it cannot be used to evenly inject a drug multiple times into a large area of skin in the field of skin care.

Korean Patent No. 10-1945554

An object of the present invention is to provide a needleless syringe capable of injecting a small amount of drug at high speed.

A needleless syringe according to the present invention, a solenoid coil wound around the outer peripheral surface of the body; a cylinder coupled in communication with the open front surface of the body; a drug accommodating part which is formed on the front inner surface of the cylinder and receives a drug injected from the outside; a nozzle unit provided at the front of the cylinder and formed to discharge the drug contained in the drug receiving unit forward; a piston provided inside the cylinder and moving forward by a magnetic force generated when a voltage is applied to the solenoid coil to pressurize the drug in the drug container; It is formed to form an air layer between the drug and the drug on the inner peripheral surface of at least a portion of the drug receiving part and the nozzle part, and includes a concave-convex part for increasing the flow rate of the drug by reducing the contact area between the inner peripheral surface and the drug by the air layer .

It is provided to open and close the communication hole between the nozzle part and the drug accommodating part, and when the piston moves forward, it is pushed by the hydraulic pressure applied to the drug from the drug accommodating part to open the communication hole, and elastic when the hydraulic pressure is released It is restored and further includes a nozzle opening/closing valve for blocking the communication hole.

The nozzle part opening/closing valve includes a ball provided to be fitted in the drug receiving part, and an elastic member installed in the nozzle part to support the ball, and the concave-convex part reduces a contact area with the ball, thereby reducing the contact area with the ball. It is formed on the inner surface of the drug receiving portion to facilitate the pushing of the ball by hydraulic pressure.

The drug accommodating part has a reduced cross-sectional area that decreases toward the front and is formed with a drug supply hole through which a drug is supplied from the outside by a pressure difference generated when the piston moves backward, and extends from the reduced portion to increase the cross-sectional area again. and is formed in a diverging nozzle shape including an enlarged part opened and closed by the nozzle part on/off valve, and the uneven part reduces the contact area with the nozzle part on-off valve to facilitate opening of the nozzle part on-off valve by the hydraulic pressure It is formed on the inner surface of the enlarged part to do so.

The concave-convex portion includes a step-shaped protrusion in the injection direction of the drug.

The concave-convex portion, a plurality of thread-shaped protrusions formed long along the injection direction of the drug are formed along the circumferential direction of the inner circumferential surface.

The concave-convex portion, a plurality of thread-shaped protrusions formed long along the spiral direction of the inner circumferential surface are formed along the scanning direction of the drug.

The concave-convex portion includes a plurality of protrusions formed to have at least one different size, shape, and height.

The concavo-convex portion includes a protrusion of a mesh structure.

The protrusion is formed so that the protrusion height is within the range of 0.001 mm to 0.1 mm.

A needleless syringe according to another aspect of the present invention, a body formed in a hollow shape; a solenoid coil wound around the outer circumferential surface of the body; a cylinder coupled to the open front surface of the body in communication with the drug receiving part for receiving the drug, and a nozzle part for discharging the drug accommodated in the drug receiving part to the front; a magnetic body which is long inserted into the body in the longitudinal direction and moves forward by a magnetic force generated when a voltage is applied to the solenoid coil; It is inserted in front of the moving magnetic body inside the body and is provided to penetrate the body and the cylinder, and when the moving magnetic body moves forward, it moves forward by the impact force applied by the moving magnetic body to deliver the drug in the drug container to the nozzle a piston for pressing negatively; an elastic member for a moving magnetic body provided between the moving magnetic body and the piston to apply an elastic force to the moving magnetic body in a direction in which the moving magnetic body moves backward; It is provided to open and close the communication hole between the nozzle part and the drug accommodating part, and when the piston moves forward, it is pushed out by the hydraulic pressure applied by the drug from the drug accommodating part to open the communication hole, and when the hydraulic pressure is released a nozzle part opening/closing valve which is elastically restored to shield the communication hole; a forward/backward driving means for repeating the forward and backward movement of the piston by repeating the supply and cut-off of voltage to the solenoid coil at a preset period; and a cooling chamber provided to surround the outside of the solenoid coil from the outside of the body to absorb heat generated from the solenoid coil through a cooling fluid to cool it, wherein the forward/backward driving means is provided when the piston moves forward A current supply unit that applies a preset voltage to the solenoid coil for a first preset time to move the moving magnetic body forward, and repeats blocking the voltage application to the solenoid coil when the piston moves backward; and an elastic member for a piston for imparting an elastic force to the piston in a direction in which the piston moves backward when the voltage application of the current supply unit is cut off, and an air layer between the drug and the drug on the inner peripheral surface of at least a portion of the drug receiving part and the nozzle part It is formed to form a, and includes a concave-convex portion for increasing the flow rate of the drug by reducing the contact area between the inner peripheral surface and the drug by the air layer.

A needle-free syringe according to another aspect of the present invention, a cylinder having a drug receiving portion is formed therein a drug injected from the outside is accommodated; a nozzle part communicating with the drug accommodating part of the cylinder and configured to discharge the drug accommodated in the drug accommodating part to the front; a drug pressurizing unit for pressing the drug in the drug receiving unit, and allowing the drug to flow toward the nozzle unit; a driving unit for driving the drug pressurizing unit; It is formed to form an air layer between the drug and the drug on the inner peripheral surface of at least a portion of the drug accommodating part and the nozzle part, reducing the contact area between the inner peripheral surface and the drug by the air layer to increase the flow rate of the drug a needle-free syringe comprising a portion.

The needleless syringe according to the present invention has the advantage of enabling high-speed injection by further increasing the flow rate of the drug by minimizing the contact area between the drug and the surface by forming an uneven part in at least a portion of the drug receiving part and the nozzle part.

In addition, in the needleless syringe, when the drug is injected, the friction loss of the fluid is reduced, so even if it is designed at a specific drug injection rate, a larger amount of the drug may be injected, and the energy required for drug injection is reduced can be In particular, when electromagnetic energy is converted into mechanical energy to move the drug, it becomes possible with less electromagnetic energy, and thus the capacity or size of the electromagnetic energy generating device may be reduced.

In addition, as the flow rate of the drug increases and the contact area between the ball and the surface of the nozzle opening/closing valve is also reduced, the ball can be more easily pushed by the hydraulic pressure of the drug, making it easy to open the nozzle opening/closing valve by the drug There is one advantage.

1 is a view showing the forward movement state of the piston of the needleless syringe according to the first embodiment of the present invention.
Figure 2 is a view showing the backward movement state of the piston of the needleless syringe according to the first embodiment of the present invention.
FIG. 3 is an enlarged view of the drug receiving unit and the nozzle unit shown in FIG. 1 .
4 is an enlarged view showing the concave-convex part according to the first embodiment of the present invention.
5 is an enlarged view showing an enlarged concave-convex part according to a second embodiment of the present invention.
6 is an enlarged view illustrating an enlarged concave-convex part according to a third embodiment of the present invention.
7 is an enlarged view showing the concave-convex part according to the fourth embodiment of the present invention.
8 is an enlarged view showing an enlarged concave-convex part according to a fifth embodiment of the present invention.
9 is an enlarged view showing the concave-convex part according to the sixth embodiment of the present invention.
10 is a view showing a comparison of the drug injection speed according to the uneven portion according to the embodiment of the present invention.

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

1 is a view showing the forward movement state of the piston of the needleless syringe according to the first embodiment of the present invention. Figure 2 is a view showing the backward movement state of the piston of the needleless syringe according to the first embodiment of the present invention.

1 and 2 , the needleless syringe according to the first embodiment of the present invention includes a body 10, a cylinder 20, a solenoid coil 30, a moving magnetic body 90, and an elastic member for a moving magnetic body. 110 , a piston 40 , a nozzle opening/closing valve 50 , a forward/backward driving means 60 , and a blocker 70 .

In the needleless syringe, when the moving magnetic body 90 is moved forward by the magnetic force generated by the solenoid coil 30, the moving magnetic body 90 collides with the piston 40 to move the piston 40. It is an impact-type syringe that moves forward.

The body 10 is formed in a hollow shape, and is formed to be elongated in the longitudinal direction. The front surface of the body 10 is formed to be opened.

The cylinder 20 is screwed to the front of the body 10 . The cylinder 20 is coupled in communication with the open front surface of the body 10 .

The cylinder 20 is formed in a hollow shape, and the cylinder main hole 21 and the drug receiving part 22 are formed therein.

The cylinder main hole 21 is formed in the inner rear side of the cylinder 20, and the front end of the body 10 is inserted into at least a part of the cylinder 20, and a screw thread is formed so as to be screwed together.

The drug accommodating part 22 is a hole formed on the front inner surface of the cylinder 20 to accommodate the drug injected from the outside, and through which the drug pressurized by the piston 40 passes. The drug accommodating part 22 is formed to have a reduced cross-sectional area than the cylinder main hole 21 . The cross-sectional area of the drug accommodating part 22 may be set according to the drug injection amount. The drug accommodating part 22 includes a reduced portion 22a whose cross-sectional area is gradually reduced toward the front of the drug accommodating portion 22, and an enlarged portion 22b that extends from the reduced portion 22a and increases in cross-sectional area again. ) is formed in the shape of a diverging nozzle containing A drug supply hole 22c for supplying a drug from the outside is formed in the reduced portion 22a by a pressure difference generated when the piston 40 moves backward. A drug charger 25 is coupled to the drug supply hole 22c.

The nozzle part 23 is provided in front of the cylinder 20, and a hole for discharging the drug accommodated in the drug accommodating part 22 to the front is formed. The nozzle unit 23 is formed to communicate with the drug receiving unit 22 and gradually decrease in cross-sectional area toward the front, and injects the drug contained in the drug receiving unit 22 . The nozzle part 23 may be integrally formed with the end of the cylinder 20 , and may be coupled to the end of the cylinder 20 to be replaceable. In this embodiment, the cylinder 20 is a first block in which the body coupling hole 21 and the drug receiving part 22 are formed, and the second block in which the nozzle part 23 is formed is coupled to each other. An example will be described. However, the present invention is not limited thereto, and it is of course possible that the first block and the second block are integrally formed.

FIG. 3 is an enlarged view of the drug receiving unit and the nozzle unit shown in FIG. 1 . 4 is a view showing an uneven portion according to the first embodiment of the present invention.

The concave-convex part 100 is formed on the inner peripheral surface of at least one of the drug receiving part 22 and the nozzle part 23 .

Referring to FIGS. 3 and 4 , in this embodiment, the concave-convex portion 100 is described as being formed on the inner peripheral surface of the enlarged portion 22b of the drug receiving portion 22 as an example. However, the present invention is not limited thereto, and the concave-convex portion 100 may be formed in the reduced portion 22a or may be formed in both the reduced portion 22a and the enlarged portion 22b. In addition, the concavo-convex portion 100 may be formed on the nozzle portion 23 , of course.

The concave-convex portion 100 includes a protrusion 100a protruding in a stepped shape in the injection direction of the drug, and a groove 100b formed between the protrusions. The concave-convex portion 100 is drilled so that the height of the protrusion 100a is within the range of 0.001 mm to 0.1 mm. When the height of the protrusion (100a) is 0.1mm or less, the flow rate of the drug increases, and if the height of the protrusion (100a) is less than 0.001mm, the flow rate of the drug is reduced again.

An air layer is formed between the protrusion 100a and the groove 100b by the uneven part 100, that is, between the drug and the inner circumferential surface, and by the surface tension of the air layer and the drug, the drug is the protrusion ( 100a) and does not come into contact with the groove portion 100b. Therefore, since friction is reduced by minimizing the contact area between the inner circumferential surface and the drug, it is possible to further increase the flow rate of the drug compared to the same energy.

In addition, the concave-convex part 100 is formed in the enlarged part 22b, and also reduces the contact area between the ball 51 of the nozzle on/off valve 50 and the inner circumferential surface, which will be described later. When the contact area between the ball 51 and the inner circumferential surface is reduced, the ball 51, which is opened while being pushed by the hydraulic pressure, can be more easily pushed, so that the nozzle opening/closing valve 50 by the hydraulic pressure of the drug. ) becomes easier to open.

The solenoid coil 30 is a coil wound on the front side of the outer circumferential surface of the body 10 and to which a current is applied when the piston 40 moves forward. The solenoid coil 30 generates a magnetic force in a direction in which the moving magnetic body 90 moves forward when a current is applied, and serves to move the moving magnetic body 90 forward.

The piston 40 is long inserted in the longitudinal direction into the body 10 and the cylinder 20 serves to push the drug accommodated in the drug receiving portion (22). The piston 40 is provided separately from the moving magnetic body 90 inside the body 10 , and is inserted in front of the moving magnetic body 90 . The piston 40 moves forward by the impact force applied by the moving magnetic body 90 during the forward movement of the moving magnetic body 90 to press the drug in the drug accommodating part 22 to the nozzle part 23. A first flange portion 41 protruding in a radial direction is formed on the outer peripheral surface of the front portion located inside the cylinder 20 of the piston 40 . The first flange portion 41 is caught by a length adjustment blocker 72 to be described later during the forward movement of the piston 40, so that the forward movement distance of the piston 40 is limited. A second flange portion 42 protruding in a radial direction is formed on the outer peripheral surface of the rear portion located inside the body 10 of the piston 40 .

The moving magnetic body 90 is not a permanent magnet, but is made of a material that temporarily has magnetism by a magnetic field generated when a current is applied to the solenoid coil 30, and the magnetism disappears when the external magnetic field disappears. The moving magnetic body 90 will be described as an iron core as an example.

The elastic member 110 for the moving magnetic body is provided in the longitudinal direction of the body 10 between the moving magnetic body 90 and the piston 40 inside the body 10 . The elastic member 110 for the moving magnetic body applies an elastic force to the moving magnetic body 110 in a direction in which the moving magnetic body 90 moves backward. The elastic member 110 for the moving magnetic body is compressed when the moving magnetic body 90 moves forward, and a first coil spring for applying an elastic force to the moving magnetic body 90 in the backward movement direction of the moving magnetic body 90 . am. One end of the elastic member 110 for the moving magnetic body may be coupled to the rear end of the piston 40 , and the other end may be coupled to the front end of the moving magnetic body 90 .

The nozzle unit opening/closing valve 50 is provided to open and close the communication hole 23a between the nozzle unit 23 and the drug receiving unit 22 . The nozzle part opening/closing valve 50 is pushed by hydraulic pressure applied by the drug accommodated in the drug accommodating part 22 during the forward movement of the piston 40 to open the communication hole 23a, and the hydraulic pressure It is elastically restored when released to shield the communication hole 23a.

The nozzle part opening/closing valve 50, the ball 51 installed in the communication hole 23a, and the nozzle part 23 are installed in the ball to provide an elastic force in the direction toward the drug receiving part (22) and an elastic member 52 that The ball 51 is formed to fit into the enlarged part 22b. In this embodiment, the nozzle opening/closing valve 50 has been described as an example of a ball valve. However, the present invention is not limited thereto, and various valves such as a duckbill valve, a plate check valve, and an electric control valve may be used as the nozzle part on/off valve 50 .

The forward/backward driving means may repeat the supply and cut-off of current to the solenoid coil 30 at a preset period, thereby repeating the forward movement and the backward movement of the piston 40 a plurality of times.

The forward/backward driving means includes a current supply unit (not shown) and the elastic member 120 for the piston.

The current supply unit (not shown) applies a current to the solenoid coil 30 when the piston 40 moves forward to move the magnetic body 90 forward. When the piston 40 moves backward, the current is cut off in the solenoid coil 30 . The current supply unit (not shown) may use any one of a capacitor (not shown) for storing current supplied from an external power supply and a DC power supply unit (not shown) for supplying current supplied from the external power supply. .

The capacitor (not shown) supplies and discharges the stored current to the solenoid coil 30 when the moving magnetic body 90 moves forward, and provides a current to the solenoid coil 30 when the moving magnetic body 90 moves backward. It is stored and stored without supplying. Accordingly, since the electric energy applied during the forward movement of the moving magnetic body 90 is greater than the electric energy applied during the backward movement, the forward speed may be increased.

The elastic member 120 for the piston is an elastic member that applies an elastic force to the piston 40 in a direction in which the piston 40 moves backward when the current supply unit cuts off the current supply. The elastic member 120 for the piston includes a second coil spring 121 and a third coil spring 122 coupled to an outer circumferential surface of the piston 40 .

The second coil spring 121 is extrapolated to the piston 40 , and both ends are provided between the cylinder 20 and the first flange part 41 . The second coil spring 121 is compressed by the first flange part 41 when the piston 40 moves forward, and in a direction in which the piston 40 moves backward when the piston 40 moves backward. An elastic force is applied to the first flange portion 41 .

The third coil spring 122 is extrapolated to the piston 40 , and both ends are provided between the body 10 and the second flange part 42 . The second coil spring 122 is compressed by the second flange part 42 when the piston 40 moves forward, and in a direction in which the piston 40 moves backward when the piston 40 moves backward. An elastic force is applied to the second flange portion 42 .

The blocker 70 is detachably coupled between the cylinder 20 and the piston 40 . The blocker 70 is a fixed blocker 71 coupled to the cylinder main hole 21 and is screwed to the inner circumferential surface of the fixed blocker 71 to adjust the length coupled to the fixed blocker 71 Possible length-adjustable blockers 72 are included.

The fixed blocker 71 has a female thread formed on an inner circumferential surface, and is formed in a ring shape.

The length adjustment blocker 72 has a male thread formed on an outer peripheral surface, and is formed in a ring shape. A predetermined interval is formed between the length adjustment blocker 72 and the piston 40 , and the piston 40 passes through the inside of the length adjustment blocker 72 to move forward and backward. The length-adjustable blocker 72 is screwed at the rear of the fixed blocker 72, and the coupling length to which the length-adjusting blocker 72 is screwed can be adjusted differently depending on the amount of drug injected at one time. As the length of the length adjustment blocker 72 screwed to the fixed blocker 71 increases, the length at which the length adjustment blocker 72 protrudes to the rear becomes shorter. When the length of the length adjustment blocker 72 protrudes backward becomes shorter, the distance d between the length adjustment blocker 72 and the first flange portion 41 increases, so that the piston 40 moves forward The moving distance d becomes longer. As the forward movement distance d of the piston 40 increases, a single injection amount of the drug is increased. As the length of the length adjustment blocker 72 screwed to the fixed blocker 71 becomes shorter, the length at which the length adjustment blocker 72 protrudes to the rear becomes longer. As the length of the length adjustment blocker 72 protruding backward becomes longer, the distance d between the length adjustment blocker 72 and the first flange portion 41 becomes shorter, so that the piston 40 moves forward. The moving distance d is shortened. As the forward movement distance d of the piston 40 is shorter, the amount of drug injected at one time is reduced. Therefore, the user can finely adjust the amount of one injection of the drug by adjusting the length at which the length adjustment blocker 72 is coupled to the fixed blocker 71 .

Meanwhile, a cooling chamber 210 is provided outside the body 10 . The cooling chamber 210 is detachably coupled to the outside of the body 10 and is provided to surround the solenoid coil 30 to cool the heat generated in the solenoid coil 30 through a cooling fluid. is a means of cooling. A cooling fluid supply pipe 211 and a cooling fluid discharge pipe 212 are coupled to the cooling chamber 210 .

The cooling fluid supply pipe 611 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 of the cooling chamber 210 to the outside. An opening/closing valve (not shown) may be provided in the cooling fluid supply pipe 211 and the cooling fluid discharge pipe 212 , respectively.

In addition, in this embodiment, a cooling fluid is used to cool the solenoid coil 30, and water or air is used as the cooling fluid. It is of course possible to do

Since the cooling chamber 210 is provided, it is possible to absorb the heat of the solenoid coil 30 and maintain it at a constant temperature, thereby preventing the magnetic force from being weakened by the heat generated in the solenoid coil 30 .

In addition, a piston cover (not shown) may be provided between the cylinder 20 and the piston 40 . The piston cover (not shown) is fixedly installed on the cylinder 20 . The piston cover 810 is provided inside the cylinder 20 and is disposed to cover the end of the piston 40 . The piston cover (not shown) may be formed of a stretchable material so that it is stretched forward by the piston 40 when the piston 40 moves forward, and is restored when the piston 40 moves backward.

A method of manufacturing the concave-convex portion 100 of the needleless syringe according to the first embodiment of the present invention configured as described above will be described as follows.

Hereinafter, in the first embodiment of the present invention, the concave-convex portion 100 will be described as an example formed only in the enlarged portion 22b of the drug receiving portion 22 .

Among the drug receiving portion 22, the enlarged portion 22b is formed by drilling using a drill (not shown) having a single blade in which microprotrusions of a preset shape are formed. The fine protrusions are formed in a shape corresponding to the shape of the concave-convex portion 100 . The drill (not shown) will be described as an example using a high-speed (hss) drill.

Therefore, when processing using the drill, the concave-convex portion 100 formed in a step shape along the injection direction of the drug is formed on the inner peripheral surface of the enlarged portion (22b).

The operation of the needleless syringe according to the first embodiment of the present invention configured as described above will be described as follows.

Referring to FIG. 1 , when the piston 40 moves forward, a preset current in a first direction is applied to the solenoid coil 30 . Here, the first direction is set to a direction in which the magnetic force is generated in a direction in which the piston 40 moves around the solenoid coil 30 .

The moving magnetic body 90 moves forward by the magnetic force generated by the solenoid coil 30 .

When the moving magnetic body 90 moves forward, the elastic member 110 for the moving magnetic body is compressed.

When the moving magnetic body 90 moves forward more than a predetermined distance, the moving magnetic body 90 collides with the piston 40 .

The piston 40 moves forward by the impact force applied while the moving magnetic body 90 collides.

The impact force is proportional to the mass and the moving speed of the moving magnetic body 90 . The moving speed may be adjusted according to the voltage applied to the solenoid coil 30 and the moving distance of the moving magnetic body 90 . When the impact force is changed by adjusting the voltage and the time the voltage is applied, the amount of drug injection at one time can be adjusted.

In this embodiment, since the piston 40 moves forward by the impact force, it can move forward at a higher speed than when the piston 40 and the magnetic moving body 90 move forward integrally. Accordingly, the electrical energy required to move the piston 40 forward can be further reduced.

When the piston 40 moves forward, the elastic member 120 for the piston is compressed. That is, when the piston 40 moves forward, the second coil spring 121 is compressed by the first flange part 41 , and the third coil spring 122 is compressed by the second flange part 42 . This is compressed.

The piston 40 may move forward only until the first flange portion 41 is caught by the length adjustment blocker 72 .

When the piston 40 moves forward, the piston 40 presses the drug in the drug accommodating part 22 .

When the drug in the drug receiving unit 22 is pressurized, the nozzle opening/closing valve 50 is opened by hydraulic pressure.

When the opening/closing valve 50 of the nozzle unit is opened, the drug in the drug receiving unit 22 may be injected forward through the nozzle unit 23 .

Since the contact area with the surface of the drug in the drug accommodating part 22 can be minimized by the concave-convex part 22b, friction is reduced, and the flow rate can be increased by about 2 to 4 times compared to the same energy.

When the piston 40 moves forward as described above, the piston 40 can only move forward until the first flange part 41 is caught by the length adjustment blocker 72, the piston 40 forward movement distance is limited.

Therefore, by adjusting the length of the length adjustment blocker 72 is coupled to the fixed blocker 71 to adjust the length that protrudes backward toward the first flange portion 41, the piston 40 of The forward movement distance is adjustable. By adjusting the forward movement distance of the piston 40, it is possible to control the amount of drug injected at one time.

Thereafter, the current supply unit supplies current to the solenoid coil 30 for a first preset time (Δt), and then, when the first preset time (Δt) elapses, the current is supplied to the solenoid coil 30 . cut off the supply

Referring to FIG. 2 , when the piston 40 moves backward, the supply of current to the solenoid coil 30 is cut off.

The current supply unit cuts off the current supply for a preset second set time, and the number of injections per second is adjusted according to the second set time.

When the current is cut off in the solenoid coil 30 , the magnetic field by the solenoid coil 30 disappears, and the force to move the moving magnetic body 90 forward disappears.

The moving magnetic body 90 moves backward by the elastic restoring force of the elastic member 110 for the moving magnetic body. That is, the moving magnetic body 90 is returned to its original position by the elastic force of the elastic member 110 for the moving magnetic body.

In addition, the piston 40 moves backward to the original position by the elastic restoring force of the elastic member 120 for the piston.

When the piston 40 moves backward, the pressure in the drug accommodating part 22 is lowered, so that the nozzle part opening/closing valve 50 is elastically restored and closed.

In addition, when the pressure in the drug accommodating part 22 is lowered, the drug may be filled in the drug accommodating part 22 from the drug filling machine 25 through the drug supply hole 22c. That is, when the piston 40 moves backward, the drug may be automatically filled.

As described above, in the present invention, by periodically supplying or blocking current to the solenoid coil 30 , the forward movement and the backward movement of the piston 40 may be repeated.

In addition, since a small amount of the drug can be repeatedly injected at high speed, it is possible to inject a small amount of the drug into the entire skin several times in fields such as skin care.

In addition, in the present embodiment, since the piston 40 moves forward by the impact force, it can move forward at a higher speed than when the piston 40 and the magnetic moving body 90 move forward integrally. Accordingly, the electrical energy required to move the piston 40 forward can be further reduced.

In addition, since the recoil of the needleless syringe 100 can be minimized by adjusting the time when the current is applied to the solenoid coil 30, there is no need to add a separate recoil offset structure, so the structure is simple and easy to use Convenience can be improved.

In addition, by forming the uneven part 100 on the inner peripheral surface of the drug receiving part 22, an air layer is formed between the inner peripheral surface and the drug by the uneven part 100, and the drug is the unevenness by the air layer Since only the protrusion of the part 100 is in contact, the contact area is minimized. Therefore, since the flow rate of the drug can be further increased compared to the same energy, there is an advantage that high-speed injection of the drug is possible.

In addition, by reducing the contact area between the ball 51 of the nozzle opening/closing valve 50 and the inner circumferential surface of the concave-convex part 100, the ball 51 that is opened while being pushed by the hydraulic pressure can be pushed more easily. Therefore, it becomes easier to open the nozzle opening/closing valve 50 by the hydraulic pressure of the drug.

Meanwhile, FIG. 5 is a view showing an uneven portion according to a second embodiment of the present invention.

5, the concave-convex part 200 according to the second embodiment of the present invention is formed on the inner peripheral surface of at least a portion of the drug receiving part 22 and the nozzle part 23, the drug injection direction Since the point formed in the shape of a thread formed long along the first embodiment is different from the first embodiment, and the rest of the configuration and operation are similar to those of the first embodiment, the description of the similar configuration will be omitted and the different points will be mainly described. .

The concave-convex portion 200 is formed long along the injection direction of the drug, a plurality is formed along the circumferential direction of the inner peripheral surface. The concave-convex portion 200 includes a protruding portion 200a protruding in the shape of a screw thread, and a groove portion 200b formed in the shape of a screw thread.

The concave-convex portion 200 is described as being formed in the enlarged portion 22b in which the cross-sectional area of the drug receiving portion 22 is gradually increased, so that the protrusion 200a has a cross-sectional area in the direction of injection of the drug, respectively. It is formed in a gradually expanding shape.

However, the present invention is not limited thereto, and the concave-convex portion 200 may be formed only in the reduced portion 22a of the drug receiving portion 22, and may be formed in the reduced portion 22a and the enlarged portion 22b. It is also possible to form all of them. In addition, the concave-convex part 200 may be formed in the nozzle part 23 , of course.

Therefore, by forming the uneven part 200 on the inner peripheral surface of the drug receiving part 22, an air layer is formed between the inner peripheral surface and the drug by the uneven part 200, and the drug is the unevenness by the air layer Since only the protrusion 200a of the portion 200 is in contact, the contact area is minimized. Therefore, since the flow rate of the drug can be further increased compared to the same energy, there is an advantage that high-speed injection of the drug is possible.

A method of manufacturing the concave-convex portion 200 of the needleless syringe according to the second embodiment of the present invention configured as described above is as follows.

Hereinafter, in the second embodiment of the present invention, the concave-convex part 200 will be described as an example formed only in the enlarged part 22b of the drug receiving part 22 .

A method of manufacturing the concave-convex portion 100 of the needleless syringe according to the second embodiment of the present invention configured as described above will be described as follows.

Hereinafter, in the second embodiment of the present invention, the concave-convex portion 100 will be described as an example formed only in the enlarged portion 22b of the drug receiving portion 22 .

The enlarged portion 22b of the drug receiving portion 22 is formed by drilling using a drill (not shown) having two blades of a preset shape. The drill (not shown) will be described as an example using a cemented carbide drill.

Therefore, when processing using the drill, the concave-convex portion 200 of the screw thread shape is formed on the inner circumferential surface of the enlarged portion 22b along the circumferential direction.

Meanwhile, FIG. 6 is an enlarged view showing the concave-convex part according to the third embodiment of the present invention.

6, the concave-convex part 300 according to the third embodiment of the present invention is formed on the inner circumferential surface of at least a portion of the drug receiving part 22 and the nozzle part 23, and is long along the spiral direction. The point formed in the formed screw thread shape is different from the first embodiment, and the rest of the configurations and actions are similar to those of the first embodiment.

The concave-convex portion 300 includes a protruding portion 300a protruding in the shape of a screw thread, and a groove portion 300b formed in the shape of a screw trough.

The concave-convex part 300 is described as an example formed in the enlarged part 22b in which the cross-sectional area of the drug receiving part 22 is gradually enlarged, but is not limited thereto, and the concave-convex part 300 is the drug It is also possible to be formed only in the reduced portion 22a of the accommodating portion 22, and it is also possible to be formed in both the reduced portion 22a and the enlarged portion 22b. In addition, the concave-convex part 300 may of course be formed on the nozzle part 23 .

As the concave-convex part 300 is formed on the inner circumferential surface of the drug receiving part 22, an air layer is formed between the inner circumferential surface and the drug by the concave-convex part 300, and the drug is provided with the concave-convex part ( Since it only comes into contact with the protrusion 300a of 300), the contact area is minimized. Therefore, since the flow rate of the drug can be further increased compared to the same energy, there is an advantage that high-speed injection of the drug is possible.

A method of manufacturing the concave-convex portion 200 of the needleless syringe according to the third embodiment of the present invention configured as described above will be described as follows.

Hereinafter, in the third embodiment of the present invention, it will be described as an example that the concave-convex part 200 is formed only in the enlarged part 22b of the drug receiving part 22 .

Of the drug receiving portion 22, the reduced portion 22a and the nozzle portion 23 are formed by drilling using a first drill (not shown) that rotates at a preset first rotational speed. However, the present invention is not limited thereto, and it is of course possible to use different drills for the reduction part 22a and the nozzle part 23 .

The enlarged portion 22b of the drug receiving portion 22 is formed by drilling using a second drill (not shown) rotating at a second rotation speed set lower than the first rotation speed. The rotation speed of the second drill (not shown) is preset to correspond to the shape and size of the concave-convex part 200 formed in the enlarged part 22b.

When the second drill (not shown) is transferred to a preset descent point, the concave-convex portion 200 having the screw thread shape is formed on the inner circumferential surface.

Here, the second drill (not shown) will be described as an example using a cemented carbide drill.

Meanwhile, FIG. 7 is an enlarged view showing the concave-convex part according to the fourth embodiment of the present invention.

7, the concave-convex portion 400 according to the fourth embodiment of the present invention is formed on the inner peripheral surface of at least a portion of the drug receiving portion 22 and the nozzle portion 23, the size, shape and height It is different from the first embodiment in that at least one of them includes a plurality of differently formed protrusions, and the rest of the configuration and operation are similar to those of the first embodiment. will be explained based on

In the concavo-convex portion 400 , a plurality of protrusions are randomly arranged, and the sizes, shapes, and heights of the protrusions are all different. The concave-convex portion 400 will be described as an embossing structure in which a plurality of concave or convex shapes are arranged.

The concave-convex portion 400 is described as an example formed in the enlarged portion 22b in which the cross-sectional area of the drug receiving portion 22 is gradually enlarged, but is not limited thereto, and the concave-convex portion 400 is the drug It is also possible to be formed only in the reduced portion 22a of the accommodating portion 22, and it is also possible to be formed in both the reduced portion 22a and the enlarged portion 22b. In addition, it is of course possible that the concave-convex part 400 is formed on the nozzle part 23 .

After the reduction portion 22a and the nozzle portion 23 of the drug receiving portion 22 are formed by drilling, the concave-convex portion 400 may be formed by post-processing.

In addition, as the uneven portion 400 is formed on the inner peripheral surface of the drug receiving part 22, an air layer is formed between the inner peripheral surface and the drug by the uneven part 400, and the drug is the unevenness by the air layer Since only the protrusion of the part 400 comes into contact, the contact area is minimized. Therefore, since the flow rate of the drug can be further increased compared to the same energy, there is an advantage that high-speed injection of the drug is possible.

8 is an enlarged view showing an enlarged concave-convex part according to a fifth embodiment of the present invention.

8, the concave-convex part 500 according to the fifth embodiment of the present invention is formed on the inner circumferential surface of at least a portion of the drug receiving part 22 and the nozzle part 23, and the protrusions of the mesh structure are formed. The points included are different from the first embodiment, and the rest of the configurations and actions are similar to those of the first embodiment. Therefore, the description of similar configurations will be omitted and the different points will be mainly described.

The concave-convex portion 500 is formed in a nano- or micro-mesh structure, and will be described as having protrusions between mesh holes.

The concave-convex part 500 is described as an example formed in the enlarged part 22b in which the cross-sectional area of the drug receiving part 22 is gradually enlarged, but is not limited thereto, and the concave-convex part 500 is the drug It is also possible to be formed only in the reduced portion 22a of the accommodating portion 22, and it is also possible to be formed in both the reduced portion 22a and the enlarged portion 22b. In addition, the concave-convex part 500 may of course be formed on the nozzle part 23 .

In addition, as the uneven part 500 is formed on the inner peripheral surface of the drug accommodating part 22, an air layer is formed between the inner peripheral surface and the drug by the uneven part 500, and the drug is the unevenness by the air layer Since only the protrusion of the part 500 is in contact, the contact area is minimized. Therefore, since the flow rate of the drug can be further increased compared to the same energy, there is an advantage that high-speed injection of the drug is possible.

9 is an enlarged view showing the concave-convex part according to the sixth embodiment of the present invention.

9, the concave-convex part 600 according to the sixth embodiment of the present invention is different from the first embodiment in that both the drug receiving part 22 and the inner peripheral surface of the nozzle part 23 are formed. , and the rest of the configuration and operation are similar to those of the first embodiment, so the description of the similar configuration will be omitted and the different points will be mainly described below.

The concave-convex portion 600 includes a protrusion protruding in a stepped step shape in the injection direction of the drug, and a groove formed between the protrusions. The concavo-convex part 600 is drilled so that the height of the protrusion is within the range of 0.001 mm to 0.1 mm. When the height of the protrusion is 0.1mm or less, the flow rate of the drug increases, and when the height of the protrusion is less than 0.001mm, the flow rate of the drug is reduced again.

By forming the concave-convex portion 600 on the inner circumferential surface of the drug accommodating portion 22, an air layer is formed between the inner circumferential surface and the drug by the concave-convex portion 600, and the drug is provided with the concave-convex portion ( 600), so that the contact area is minimized. Therefore, since the flow rate of the drug can be further increased compared to the same energy, there is an advantage that high-speed injection of the drug is possible.

In addition, the concave-convex part 600 is formed in both the enlarged part 22b and the nozzle part 23 to reduce the contact area between the ball 51 and the inner peripheral surface of the nozzle opening/closing valve 50, which will be described later. When the contact area between the ball 51 and the inner circumferential surface is reduced, the ball 51, which is opened while being pushed by the hydraulic pressure, can be more easily pushed, so that the nozzle opening/closing valve 50 by the hydraulic pressure of the drug. ) becomes easier to open.

As described above, in the sixth embodiment of the present invention, the concavo-convex portion 600 is formed in the step shape as an example. Applicable.

10A is an experimental result of measuring the injection speed of the drug when there is an uneven portion, and FIG. 10B is an experimental result of measuring the injection speed of the drug when there is no uneven portion.

Referring to FIG. 10A , when there is an uneven portion with respect to the same energy, the injection speed of the drug injected through the nozzle portion is about 701 m/s. Referring to FIG. 10b , when there is no concavo-convex part, the injection speed of the drug injected through the nozzle part is about 262 m/s.

Therefore, it can be seen that when there is an uneven portion, the injection speed of the drug is more increased.

On the other hand, in the above embodiments, it has been described as an example that the nozzle opening/closing valve 50 is installed. When there is no opening/closing valve 50 of the nozzle part, the drug is pre-filled in the drug receiving part 22 . In addition, even when there is no opening/closing valve 50 of the nozzle part, the drug is in contact only with the protrusion 100a by the surface tension of the air layer and the drug and does not come into contact with the groove part 100b. Therefore, since friction is reduced by minimizing the contact area between the inner circumferential surface and the drug, it is possible to further increase the flow rate of the drug compared to the same energy.

In addition, in the above embodiments, the drug pressurizing unit for pressing the drug in the drug receiving unit is a piston 40, and the driving unit for driving the drug pressurizing unit has been described as including a solenoid coil (30).

However, the present invention is not limited thereto, and any drug pressurizing unit capable of pressing the drug, such as an elastic membrane, in addition to the piston 40 may be applied.

In addition, the driving unit, any energy source capable of applying pressure to the drug pressing unit, such as the piston or the elastic membrane, is applicable. For example, the driving unit may include a pneumatic actuator, a hydraulic actuator, a piezo actuator, a spring device, and the like.

In addition, the driving unit may include a laser beam. That is, it is also possible to directly irradiate the laser beam to the drug, and the laser beam is irradiated to the working fluid in a separate sealed pressure chamber to generate bubbles, and the volume expansion due to the bubbles generated in the working fluid expands the elastic membrane. , It is of course also possible to be configured to apply instantaneous pressure to the drug in the drug receiver.

In addition, the driving unit, including the electrode, when high-voltage electricity is discharged to the electrode, insulation breakdown occurs together with a spark in the working fluid in a separate sealed pressure chamber to generate bubbles, and bubbles generated in the working fluid It is of course also possible that the volume expansion due to the expansion of the elastic membrane is configured to apply an instantaneous pressure to the drug in the drug container.

Although the present invention has been described with reference to the embodiment shown in the drawings, which is merely exemplary, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: body 20: cylinder
21: cylinder main hole 22: drug receiving part
23: nozzle unit 30: solenoid coil
40: piston 50: nozzle opening/closing valve
70: blocker 71: fixed blocker
72: length-adjustable blocker 90: magnetic kinetic body
110: elastic member for moving magnetic body 120: elastic member for piston
121: second coil spring 122: third coil spring

Claims (12)

a solenoid coil wound around the outer circumferential surface of the body;
a cylinder coupled in communication with the open front surface of the body;
a drug accommodating part which is formed on the front inner surface of the cylinder and receives a drug injected from the outside;
a nozzle unit provided at the front of the cylinder and formed to discharge the drug contained in the drug receiving unit forward;
a piston provided inside the cylinder and moving forward by a magnetic force generated when a voltage is applied to the solenoid coil to pressurize the drug in the drug container;
It is formed to form an air layer between the drug and the drug on the inner peripheral surface of at least a portion of the drug receiving part and the nozzle part, including a concave-convex part for increasing the flow rate of the drug by reducing the contact area between the inner peripheral surface and the drug by the air layer needleless syringe. The method according to claim 1,
It is provided to open and close the communication hole between the nozzle part and the drug accommodating part, and when the piston moves forward, it is pushed by the hydraulic pressure applied to the drug from the drug accommodating part to open the communication hole, and elastic when the hydraulic pressure is released Needleless syringe further comprising a nozzle opening/closing valve that is restored and shields the communication hole. 3. The method according to claim 2,
The nozzle part opening/closing valve,
It includes a ball provided to fit into the drug receiving part, and an elastic member installed in the nozzle part to support the ball,
The concave-convex portion, a needle-free syringe formed on the inner surface of the drug receiving portion to reduce the contact area with the ball to facilitate the sliding of the ball by the hydraulic pressure. 3. The method according to claim 2,
The drug receiving unit,
A reduced portion in which the cross-sectional area decreases toward the front and a drug supply hole is formed through which a drug is supplied from the outside by a pressure difference generated when the piston moves backward;
It is formed in a divergent nozzle shape extending from the reduced portion to increase the cross-sectional area again and including an enlarged portion opened and closed by the nozzle portion on-off valve,
The concave-convex part is formed on the inner surface of the enlarged part to reduce the contact area with the nozzle part on-off valve to facilitate the opening of the nozzle part on-off valve by the hydraulic pressure. The method according to claim 1,
The concave-convex part,
A needle-free syringe comprising a step-shaped protrusion in the injection direction of the drug. The method according to claim 1,
The concave-convex part,
A needleless syringe in which a plurality of thread-shaped protrusions formed long along the injection direction of the drug are formed along the circumferential direction of the inner circumferential surface. The method according to claim 1,
The concave-convex part,
A needleless syringe in which a plurality of thread-shaped protrusions formed long along the spiral direction of the inner circumferential surface are formed along the injection direction of the drug. The method according to claim 1,
The concave-convex portion, a needle-free syringe comprising a plurality of protrusions formed to have at least one different size, shape, and height. The method according to claim 1,
The concave-convex portion, a needle-free syringe including a protrusion of a mesh structure. 10. The method according to any one of claims 5 to 9,
The protrusion is a needle-free syringe formed so that the protrusion height is within the range of 0.001mm to 0.1mm. a body formed in a hollow shape;
a solenoid coil wound around the outer circumferential surface of the body;
a cylinder coupled to the open front surface of the body in communication with the drug receiving part for receiving the drug, and a nozzle part for discharging the drug accommodated in the drug receiving part to the front;
a magnetic body which is long inserted into the body in the longitudinal direction and moves forward by a magnetic force generated when a voltage is applied to the solenoid coil;
It is inserted in front of the moving magnetic body inside the body and is provided to penetrate the body and the cylinder, and when the moving magnetic body moves forward, it moves forward by the impact force applied by the moving magnetic body to deliver the drug in the drug container to the nozzle a piston for pressing negatively;
an elastic member for a moving magnetic body provided between the moving magnetic body and the piston to apply an elastic force to the moving magnetic body in a direction in which the moving magnetic body moves backward;
It is provided to open and close the communication hole between the nozzle part and the drug accommodating part, and when the piston moves forward, it is pushed out by the hydraulic pressure applied by the drug from the drug accommodating part to open the communication hole, and when the hydraulic pressure is released a nozzle part opening/closing valve which is elastically restored to shield the communication hole;
a forward/backward driving means for repeating the forward and backward movement of the piston by repeating the supply and cut-off of voltage to the solenoid coil at a preset period;
and a cooling chamber provided to surround the outside of the solenoid coil from the outside of the body to absorb heat generated in the solenoid coil through a cooling fluid to cool it,
The forward and backward driving means,
When the piston moves forward, a preset voltage is applied to the solenoid coil for a first preset time to move the moving magnetic body forward, and a current supply unit that repeats blocking the voltage application to the solenoid coil when the piston moves backward Wow;
and an elastic member for a piston that applies an elastic force to the piston in a direction in which the piston moves backward when the voltage application of the current supply unit is cut off,
It is formed to form an air layer between the drug and the drug on the inner peripheral surface of at least a portion of the drug receiving part and the nozzle part, and further includes an uneven part for increasing the flow rate of the drug by reducing the contact area between the inner peripheral surface and the drug by the air layer needleless syringe. a cylinder having a drug accommodating portion formed therein in which a drug injected from the outside is accommodated;
a nozzle part communicating with the drug accommodating part of the cylinder and configured to discharge the drug accommodated in the drug accommodating part to the front;
a drug pressurizing unit for pressing the drug in the drug receiving unit, and allowing the drug to flow toward the nozzle unit;
a driving unit for driving the drug pressurizing unit;
It is formed to form an air layer between the drug and the drug on the inner peripheral surface of at least a portion of the drug accommodating part and the nozzle part, reducing the contact area between the inner peripheral surface and the drug by the air layer to increase the flow rate of the drug A needleless syringe containing a boo.

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