KR102241500B1 - Device injecting drug provided with needle moving reciprocatively - Google Patents

Abstract

The present invention relates to a drug injection device with a reciprocating needle to inject a drug while the needle is separated from the skin. According to the present invention, the drug injection device with a reciprocating needle comprises: a main body; an injection hole formed through the outer circumferential surface of the main body; a drug chamber communicating with the injection hole to inject a drug through the injection hole; an actuator reciprocating in the longitudinal direction of the main body while being partially inserted into the main body; a moving plate coupled to one end of the actuator disposed inside the main body and installed in close contact with the inner wall of the main body; a one-way valve formed in the moving plate and opened when the moving plate moves in a direction away from the skin by the actuator; and the needle communicating with the one-way valve and injecting the drug by penetrating the skin.

Description

Drug injection device having a reciprocating needle {DEVICE INJECTING DRUG PROVIDED WITH NEEDLE MOVING RECIPROCATIVELY}

The present invention relates to a drug injection device, and more particularly, to a drug injection device having a reciprocating needle in which the drug is injected when the movable plate is retracted while the needle penetrates the skin.

In general, as a treatment method for skin beauty and health, obesity treatment, such as wrinkles, acne removal, dead skin removal, hair loss treatment, etc., a method of penetrating drugs into the skin is used.

Examples of such treatment methods include a method of maximizing the efficacy of the drug by making a hole in the skin and then applying a drug or cosmetics on it to allow the drug to penetrate quickly and in a large amount, and the stimulation of the skin with a needle, resulting in the reflex action of the human body. There are ways to induce the formation of collagen.

When a plurality of micropores are formed in the human skin, new flesh sprouts by the autogenous force of damaged skin tissue, and when a therapeutic drug is applied to a region where the micropores are formed, the drug can quickly penetrate into the skin through the micropores.

In other words, due to the natural wound healing action that occurs when a number of needles penetrate the skin, the dermis tissue is newly constructed and rearranged, so that the scar becomes shallow, and the skin is pulled tightly, reducing fine lines and improving pigmentation, making it healthy. You can be revived with clean skin.

In recent years, in order to facilitate the procedure of the skin improvement method using a needle, a number of drug injection devices for skin have been supplied.

However, if the drug is injected at high speed while the needle is infiltrated into the skin, negative pressure is formed in the skin, so that the drug cannot be supplied smoothly, and there is a problem that a feeling of heterogeneity is given to the affected area.

Therefore, there is a need for research on a new structure of a drug injection device that enables smooth drug injection without generating negative pressure during drug injection, and minimizes the sense of heterogeneity caused by pressure applied when drug injection through a needle. .

Korean Patent Registration 10-1665574 (announced on October 12, 2016) Korean Patent Publication 10-2019-0049097 (published on May 9, 2019)

The present invention is to solve the above problems, and an object of the present invention is to inject a drug while the needle is separated from the skin.

The above object is a main body, an injection hole formed through the outer circumferential surface of the main body, a drug chamber communicating so that a drug is injected through the injection hole, and a reciprocating motion along the length direction of the main body with a part inserted into the inner side of the main body. Actuator, a movable plate coupled to one end of the actuator located inside the body and installed in close contact with the inner wall of the body, formed on the movable plate, in a direction away from the skin by the actuator It can be achieved by a drug injection device including a one-way valve that is opened when moving and a needle that is in communication with the one-way valve and penetrates the skin to inject the drug.

It may include a plurality of through holes formed through the movable plate and formed in an area projected between the outer circumferential surface of the needle and the inner circumferential surface of the one-way valve.

When pressure is applied from the through hole, the one-way valve is elastically deformed and opened to the skin side, and when pressure is applied from the skin side, the inner circumferential surface of the one-way valve may be in close contact with the outer circumferential surface of the needle to be closed.

An RF generator electrically connected to the needle may be further included, and electrical energy generated from the RF generator may be generated from the needle.

The RF generator may be operated while the cut portion of the needle penetrates the skin.

The one-way valve may include an inner cap formed to surround an outer circumferential surface along the longitudinal direction of the needle, and an outer cap formed to have a larger diameter than the inner cap and surround it.

It may include a plurality of through holes formed through the movable plate and formed in an area projected between the outer circumferential surface of the needle and the inner circumferential surface of the inner cap.

When pressure is applied from the through hole, the inner cap is elastically deformed and opened to the skin side, and when pressure is applied from the skin side, the inner circumferential surface of the inner cap may be in close contact with the outer circumferential surface of the needle to be closed.

It may include a plurality of flow holes formed through the outer circumferential surface of the needle and formed on the outer circumferential surface between the inner cap and the outer cap.

A control valve installed at the injection port and opened when the movable plate moves in a direction approaching the skin side may be further included.

According to the present invention, since the drug is administered while the needle is infiltrated into the skin and separated to the outside, negative pressure generated in the skin is minimized, so that the drug can be discharged smoothly.

In addition, in the case of administering a drug by penetrating the needle into the patient's skin, a separate driving energy source is omitted by generating positive or negative pressure by using a movable plate that can move in a vacuum state inside the body where the needle is installed. Even if it is discharged naturally, energy efficiency can be increased.

In addition, since the drug is discharged as the needle is separated from the skin, the negative pressure generated in the skin can be minimized, thereby minimizing the sense of heterogeneity generated in the skin.

1 is a cross-sectional view of a drug injection device having a reciprocating needle according to an embodiment of the present invention.
2 and 3 show a state in which the actuator of FIG. 1 is being moved toward the skin.
4 and 5 show a state in which the actuator of FIG. 1 is being moved in a direction away from the skin side.
6 is a cross-sectional view of a drug injection device having a reciprocating needle according to another embodiment of the present invention.
7 and 8 show a state in which the actuator of FIG. 6 is being moved toward the skin.
9 and 10 show a state in which the actuator of FIG. 6 is being moved in a direction away from the skin side.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms. It is provided to fully inform the technician of the scope of the present invention.

The terms used in the present specification are for describing exemplary embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used herein, “comprises” and/or “comprising” do not exclude the presence or addition of one or more other elements other than the mentioned elements. Throughout the specification, the same reference numerals refer to the same elements, and "and/or" includes each and all combinations of one or more of the mentioned elements. Although "first", "second", and the like are used to describe various elements, it goes without saying that these elements are not limited by these terms. These terms are only used to distinguish one component from another component. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical idea of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used with meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a drug injection device having a reciprocating needle according to an embodiment of the present invention.

Referring to FIG. 1, a drug injection device having a reciprocating needle according to an embodiment of the present invention includes a main body 100, an injection hole 101 formed through the outer circumferential surface of the main body 100, and an injection hole 101. The drug chamber 110 communicates with the drug to be injected, the actuator 120 reciprocating along the longitudinal direction of the main body 100 with a part inserted inside the main body 100, located inside the main body 100 The movable plate 130, which is coupled to one end of the actuator 120 and installed in close contact with the inner wall surface of the main body 100, is formed on the movable plate 130, and is movable plate by the driving force of the actuator 120. It may include a one-way valve 140 that is opened when the 130 moves in a direction away from the skin and a needle 150 that communicates with the one-way valve 140 and penetrates the skin to inject the drug.

The main body 100 forms the outer shape of the drug injection device, and may be formed in a cylindrical hollow shape.

The cross-sectional shape of the main body 100 may be a hollow cylinder shape. A part of the actuator 120 is moved in a state in which a part of the actuator 120 is located in the inner space of the main body 100, and the movable plate 130 can be moved along the axial direction of the actuator 120 in a state in close contact with the inner wall surface of the main body 100 Space can be provided to do so.

The cross-sectional shape of the main body 100 may be formed in a shape such as a polygon in addition to a circular shape, but a circular shape suitable for shape processing of the movable plate 130 will be described as an example.

The injection port 101 is located at the upper left of the main body 100 as shown in the accompanying drawings of the present embodiment, but if the drug can be injected into the main body 100, any of the side walls or the upper wall of the main body 100 It can be formed through the wall surface. The drug chamber 110, which will be described later, is communicated through the injection hole 101 formed through the penetration.

In addition, a control valve (not shown) may be installed in the injection port 101.

The control valve may control fluid flow by opening and closing a communication state between the drug chamber 110 and the pressure chamber P. That is, when the control valve is opened while the movable plate 130 is lowered, the drug L in the drug chamber 110 may be sucked by the negative pressure formed in the pressure chamber P. On the contrary, when the control valve is closed while the movable plate 130 is rising, it means controlling so that a positive pressure is formed in the pressure chamber P.

Specifically, the control valve may be opened and controlled so that the drug (L) of the drug chamber 110 is sucked by the negative pressure generated in the pressure chamber (P) during the process of moving the movable plate 130 toward the skin (S) side. have. Conversely, the control valve may be closed and controlled so that positive pressure is generated in the pressure chamber P while the movable plate 130 moves in a direction away from the skin S side. Here, it goes without saying that the control valve may be omitted when used as a one-time use, such as a case where only the drug contained in the drug chamber 110 is sucked and discharged.

A drug such as a liquid or a gel may be accommodated in the drug chamber 110 provided inside the drug chamber 110, or a polymer such as a crystalline powder in a crystalline state may be mixed with the drug, The drug accommodated in the drug chamber 110 is injected into the body 100 through the injection port 101.

The drug accommodated in the drug chamber 110 generates an external force that exceeds the pressure of the pressure chamber P provided in the main body 100 to inject into the pressure chamber P, a syringe or an injector ( An injection device such as an injerctor) may be used, but in this embodiment, not only energy efficiency is increased, but also the number of necessary components for implementation is increased by naturally being sucked by a pressure change in the pressure chamber P as described later. It is intended to achieve a reduced effect.

That is, when the pressure chamber P is formed in a vacuum state and the pressure of the pressure chamber P changes according to the movement of the movable plate 130 coupled to the end of the actuator 120, the pressure chamber generated thereby The drug in the drug chamber 110 may be sucked toward the pressure chamber P by the negative or positive pressure in (P), or the drug introduced into the pressure chamber P may be extruded through the needle 150.

One part of the actuator 120 along the longitudinal direction may be located inside the main body 100, and a part of the opposite side may be installed in a state exposed to the outside of the main body 100. In other words, the actuator 120 reciprocates along its axial direction by an external force, but a part of the actuator 120 is located inside the main body 100, and a part along the length direction of the actuator 120 appears and disappears. Repeatedly, the opposite side portion may be coupled to a drive device not shown.

The driving device may be a driving device such as a solenoid valve that is fixedly coupled to the actuator 120 and can be driven to reciprocate along the longitudinal direction of the actuator 120, but a cam that is interlocked so that the actuator 120 reciprocates. Alternatively, since a connection structure such as gear coupling is also possible, it is not limited to the solenoid valve mentioned here, and may be a driving device of various types.

In the drawings attached to this embodiment, the upper surface of the movable plate 130 is coupled to the lower end of the actuator 120 so as to be moved integrally.

The movable plate 130 may have a predetermined thickness and may be formed in a shape that is in close contact with the inner wall surface of the main body 100. Here, when the cross-sectional shape of the main body 100 is circular, the outer circumferential shape of the movable plate 130 must be circular, and when the cross-sectional shape of the main body 100 is polygonal, the outer circumferential shape of the movable plate 130 must be polygonal. Of course it is.

The outer circumferential shape of the movable plate 130 is formed to correspond to the shape of the main body 100, but the diameter or width of the movable plate 130 is preferably formed to be at least the same as the inner diameter of the main body 100.

Additionally, a sealing member (not shown) may be disposed on the outer circumferential surface of the movable plate 130. The sealing member may be made of a rubber material that is elastically deformed. Due to this sealing member, air or fluid inside the pressure chamber P secures airtightness with the outside of the pressure chamber P. It is possible to increase the efficiency of negative or positive pressure.

A through hole 131 spaced radially around the moving axis of the actuator 120 may be formed in the movable plate 130. A through hole 131 may be formed to allow fluid to pass through the movable plate 130 in the thickness direction. A plurality of through holes 131 may be formed to flow toward the one-way valve 140 to be described later.

The one-way valve 140 may be formed to selectively pass air or fluid in the thickness direction of the movable plate 130.

When the one-way valve 140 is opened, a potion flowing through the through hole 131 may be configured to flow along the outer circumferential surface of the needle 150. Here, the potion flows along the outer circumferential surface of the needle 150, but when a guide groove (not shown) is formed on the outer circumferential surface of the needle 150 from one end to the other end along the length direction, the potion is applied to the needle 150 along the guide groove. ) Can be guided from one end to the other. In this case, a guide groove passing through the arrival point of the potion sprayed from the one-way valve 140 is formed.

In addition, when there are two one-way valves 140 disposed, it means that two guide grooves are formed, and a number of guide grooves corresponding to the number of installations of the one-way valve 140 may be formed.

In the drawings attached to this embodiment, the one-way valve 140 is shown in an inclined form to have a length in the direction of the needle 150 (upper and lower in the drawing), but this shape is only an exaggerated shape to aid understanding. , It may be formed in various shapes to have a shorter length according to the design value applied to the negative or positive pressure formed in the pressure chamber (P). In addition, in addition to the structure of the one-way valve 140 shown, any structure such as a valve structure capable of performing a function of guiding a fluid made of a liquid or gas to flow in only one direction in the pressure chamber P may be applied.

The one-way valve 140 may be formed of a thin rubber material, preferably silicone rubber. Since the silicone rubber has excellent elasticity and low thermal conductivity, as described later, when a function such as laser or RF high frequency is additionally applied, it effectively shields the heat generated by laser irradiation, etc. It has the advantage of preventing deterioration and damage.

In addition, as the material of the one-way valve 140, any material having elasticity and liquid impermeability may be used according to selection of nitrile butadiene rubber (NBR).

The one-way valve 140 may be opened when pressure is applied from the through hole 131, and may be formed in a shape that is easy to adhere to the outer circumferential surface of the needle 150 when pressure is applied from the skin (S) side. At this time, the end of the one-way valve 140 in contact with the outer circumferential surface of the needle 150 is preferably formed to be convexly curved toward the needle 150.

The needle 150 allows the drug L passing through the one-way valve 140 to flow along the inner space and then be injected along the outer circumferential surface of the needle 150 toward the skin S.

A plurality of needles 150 may be arranged radially around the moving axis of the actuator 120. However, in the present embodiment, for convenience of explanation, it is assumed that one or two needles 150 are provided on a cross-sectional view as shown in the accompanying drawings.

In addition, when an RF generator (not shown) that is electrically connected to the needle 150 is further included, the needle 150 is in a state in which an environment in which electricity does not flow inside the drug is implemented by applying an insulating coating to the needle. It may be configured so that the electric energy generated from the RF generator in the state of penetrating the skin S can be supplied into the skin through the needle 150.

Hereinafter, an operation process of the drug injection device having a reciprocating needle according to an embodiment of the present invention will be described as follows.

2 and 3 show a state in which the actuator of FIG. 1 is being moved toward the skin.

First, referring to FIG. 2, when a driving force toward the skin side is applied to the actuator 120, the actuator 120 is moved up and down in the drawing.

As the outer circumferential surface of the movable plate 130, which is integrally moved with the actuator 120, descends in close contact with the inner wall surface of the main body 100, a negative pressure is generated in the pressure chamber P.

At this time, when the injection port 101 is open, or when the injection port 101 is controlled to be opened by installing a control valve, the drug contained in the drug chamber 110 is sucked into the pressure chamber P.

While the movable plate 130 continuously descends, the drug flowing into the pressure chamber P is maintained in a vacuum state by the one-way valve 140, so that the state in which the drug is temporarily accommodated on the movable plate 130 is maintained. Can be.

At the same time, in order to prevent negative pressure from being formed in the space between the skin S and the movable plate 130, air is discharged through the ventilation hole 102 formed through the outer wall of the main body 100.

Here, most of the internal pressure existing in the space is discharged through the ventilation hole 102 by the one-way valve 140 that is kept in a closed state.

Referring to FIG. 3, FIG. 3 is a state in which the movable plate 130 in the state shown in FIG. 2 is further lowered, and a larger amount of the drug L is temporarily accommodated on the movable plate 130, and is movable. It is located at H2 which is the maximum descending height of the plate 130.

At this time, the position of the ventilation hole 102 is defined as the maximum moving distance from H1 to H2, which is the initial position of the movable plate 130, as shown by the movable plate 130 as an example, the distance between H1 and H2 is 2 to 3 mm It may be, and the movable plate 130 may be set to a position passing through H2. If the location of the ventilation hole 102 is H1-H2, this is because the drug L temporarily accommodated in the movable plate 130 may be leaked to the outside.

4 and 5 show a state in which the actuator of FIG. 1 is being moved in a direction away from the skin side.

First, referring to FIG. 4, in a state in which the needle 150 penetrates the skin S, it starts to rise due to an upward driving force applied to the actuator 120.

As the movable plate 130 starts to rise, a positive pressure is generated in the pressure chamber P, whereby the drug L temporarily accommodated on the movable plate 130 is discharged through the through hole 131. In this case, a flow path F may be defined between the inner circumferential surface of the one-way valve 140 and the outer circumferential surface of the needle 150. In addition, a gap C is formed between the inner circumferential surface of the one-way valve 140 and the outer circumferential surface of the needle 150 by the positive pressure acting on the pressure pushing the one-way valve 140. The drug L injected from the one-way valve 140 passes through the flow path F, the drug L passes through the gap C, and flows along the outer circumferential surface of the needle 150.

As the movable plate 130 gradually rises, the drug L that was accommodated in the movable plate 130 gradually flows along the outer circumferential surface of the needle 150, and is formed by being invaded by the end of the needle 150. The drug is supplied through the process of being discharged into the skin (S) through the hole.

At this time, since the drug that can offset the negative pressure inside the skin (S) is simultaneously supplied as the needle 150 that has penetrated into the skin (S) exits, the drug (L) is supplied smoothly and at the same time to the affected area. You can expect the effect of minimizing the feeling of disparity.

As shown in FIG. 5, when the cut part 520 of the needle 150 is completely separated from the skin S, the drug L is completely discharged by the positive pressure inside the pressure chamber P in the same manner as described above. Thus, there is no residual drug on the movable plate 130.

6 is a cross-sectional view of a drug injection device having a reciprocating needle according to another embodiment of the present invention.

6, a drug injection device having a reciprocating needle according to another embodiment of the present invention is provided through a main body 200, an injection port 201, and an injection port 201 formed through the outer circumferential surface of the main body 200. A drug chamber 210 communicated so that a drug is injected, an actuator 220 that reciprocates along the length direction of the main body 200 with a part inserted inside the main body 200, located inside the main body 200 A movable plate 230 coupled to one end of the actuator 220 and installed in close contact with the inner wall surface of the main body 200, formed on the movable plate 230, and a movable plate by the driving force of the actuator 220 It may include a one-way valve 240 that is opened when the 230 moves in a direction away from the skin and a needle 250 that communicates with the one-way valve 240 and penetrates the skin to inject the drug.

The configuration shown in FIG. 6 is compared with the configuration of FIG. 1, the one-way valve 140 of FIG. 1 is composed of an inner cap 410 and an outer cap 420 as shown in FIG. 6, and FIG. 1 There is a difference in that a plurality of flow holes 251 are additionally formed in the needle 150 of, and a detailed description of other overlapping configurations will be omitted.

The one-way valve 240 may be formed to selectively pass air or fluid in the thickness direction of the movable plate 230. That is, the one-way valve 240 may be opened when pressure is applied from the through hole 231, and may be formed in a shape that is easy to come into close contact with the outer peripheral surface of the needle 250 when pressure is applied from the skin (S) side.

In this case, the through hole 231 may be formed at a position in which the fluid inside the pressure chamber P can be guided between the inner circumferential surface of the inner cap 410 and the outer circumferential surface of the needle 150.

The one-way valve 240 has a diameter larger than the inner cap 241 and the inner cap 241 formed to surround the outer circumferential surface along the length direction of the needle 250 and is spaced apart from the inner cap 241 to surround the inner cap 241. It may include an outer cap 242 to be formed.

The inner cap 241 may be formed in a hollow conical shape in which one end having a relatively small diameter is in close contact with the outer circumferential surface of the needle 250. In this case, the outer cap 242 is formed in a hollow conical shape having a larger diameter than the inner cap 241, and is disposed in a form that wraps outward in the radial direction of the inner cap 241, so that the outer circumferential surface of the inner cap 241 and the outer cap A flow path F may be defined between the inner circumferential surfaces of the 242.

The inner cap 241 and the outer cap 242 are thin films having an elastic restoring force, and may form a boundary between the pressure between the pressure chamber P and the drug chamber 210.

In particular, the inner cap 241 and the outer cap 242 may be formed of a thin rubber material, and silicone rubber may be preferably used. Since the silicone rubber has excellent elasticity and low thermal conductivity, as described later, when a function such as laser or RF high frequency is additionally applied, it effectively shields the heat generated by laser irradiation, etc. It has the advantage of preventing deterioration and damage.

In addition, any material having elasticity and liquid impermeability may be used as the material of the inner cap 241 and the outer cap 242 according to selection of nitrile butadiene rubber (NBR).

The inner cap 241 may be opened when pressure is applied from the through hole 231, and may be formed in a shape that is easy to adhere to the outer circumferential surface of the needle 250 when pressure is applied from the skin (S) side. In this case, the end of the inner cap 241 in contact with the outer circumferential surface of the needle 250 is preferably formed to be convexly curved toward the needle 250.

The needle 250 allows the drug (L) passing through the one-way valve 240 to flow along the inner space, and then discharge into the skin (S) through the cut portion 252 formed at the end of the needle 250. do.

A plurality of needles 250 may be arranged radially around the moving axis of the actuator 220. However, in the present embodiment, it is assumed that one or two needles 250 are provided as shown in the accompanying drawings for convenience of description.

In addition, the needle 250 may include a plurality of flow holes 251. The flow hole 251 may be formed on the outer peripheral surface of the needle 250 exposed between the inner cap 241 and the outer cap 242.

When the inner cap 241 is opened and the drug L is introduced, the flow hole 251 provides a function of guiding the introduced drug L to flow into the inner space of the needle 250 through the flow hole 251. Will perform.

In addition, a cut portion 252 processed to form a sharp shape as necessary is formed at the end of the needle 250 on the skin side, so that it is easy to penetrate while in contact with the patient's skin.

The inner cap 241 of the one-way valve 240 is opened so that the drug (L) is introduced, and the introduced drug (L) passes through the inner space of the needle 250 and is guided along the length direction, and then the needle ( By being discharged from the cutting portion 252 of the 250), the drug (L) is injected into the inside of the skin (S).

In addition, when an RF generator (not shown) that is electrically connected to the needle 250 is further included, an environment in which electricity does not flow inside the drug is implemented by applying an insulating coating to the needle. In a state in which the cutting part 252 penetrates the skin S, the electric energy generated from the RF generator may be configured to be supplied into the skin through the needle 250.

Hereinafter, an operation process of the drug injection device having a reciprocating needle according to an embodiment of the present invention will be described as follows.

7 and 8 show a state in which the actuator of FIG. 6 is being moved toward the skin.

First, referring to FIG. 7, when a driving force toward the skin side is applied to the actuator 220, the actuator 220 is moved up and down in the drawing.

As the outer circumferential surface of the movable plate 230, which is integrally moved with the actuator 220, descends in close contact with the inner wall surface of the main body 200, a negative pressure is generated in the pressure chamber P.

At this time, when the injection port 201 is open, or when the injection port 201 is controlled to open by installing a control valve, the drug contained in the drug chamber 210 is sucked into the pressure chamber P.

While the movable plate 230 continuously descends, the drug flowing into the pressure chamber P is maintained in a vacuum state by the inner cap 241 of the one-way valve 240, so that the drug is temporarily placed on the movable plate 230. The state of being accepted can be maintained.

At the same time, in order to prevent negative pressure from being formed in the space between the skin S and the movable plate 230, air is discharged through the ventilation hole 202 formed through the outer wall of the main body 200.

Here, some of the pressure may be transmitted through the flow hole 251 of the needle 250, but most of the air existing in the space by the inner cap 241 that is kept closed is the ventilation hole 202 ) Through.

Referring to FIG. 8, FIG. 3 is a state in which the movable plate 230 in the state shown in FIG. 2 is further lowered, and a larger amount of the drug L is temporarily accommodated on the movable plate 230, and is movable. It is located at H2 which is the maximum descending height of the plate 230.

At this time, the position of the ventilation hole 202 is defined as the maximum moving distance from H1 to H2, which is the initial position of the movable plate 230, as shown as an example, the distance between H1 and H2 is 2 to 3 mm It may be, and the movable plate 230 may be set to a position passing through H2. This is because, if the location of the ventilation hole 202 is the location of H1-H2, the drug L temporarily accommodated in the movable plate 230 may be leaked to the outside.

9 and 10 show a state in which the actuator of FIG. 6 is being moved in a direction away from the skin side.

First, referring to FIG. 9, in a state where the cut portion 252 of the needle 250 penetrates the skin S, it starts to rise by an upward driving force applied to the actuator 220.

As the movable plate 230 starts to rise, a positive pressure is generated in the pressure chamber P, whereby the drug L temporarily accommodated on the movable plate 230 is discharged through the through hole 231. At this time, in the process of flowing the flow path F formed between the inner cap 241 and the outer cap 242, the pressure to push the inner cap 241 by the positive pressure acts, so that the inner circumferential surface of the inner cap 241 and A gap C is formed between the outer circumferential surfaces of the needle 250. The drug (L) passes through this gap (C), and flows into the flow hole (251) of the needle (250).

As the movable plate 230 gradually rises, the drug L that was accommodated in the movable plate 230 gradually flows through the needle 250, and the cut portion 252 formed at the end of the needle 250 is removed. The drug is supplied through the process of being discharged into the skin (S).

At this time, since the drug that can offset the negative pressure inside the skin (S) that is generated when the needle 250 that has penetrated into the skin (S) exits, is provided at the same time, the drug (L) is supplied smoothly and at the same time to the affected area. You can expect the effect of minimizing the feeling of disparity.

As shown in FIG. 10, when the cut part 252 of the needle 250 is completely separated from the skin S, the drug L is completely discharged by the positive pressure inside the pressure chamber P in the same manner as described above. Thus, there is no residual drug on the movable plate 230.

Accordingly, according to the present invention, since the drug is administered in the process of leaving the needle in the state of penetrating into the skin, negative pressure generated in the skin is minimized, so that the drug can be discharged smoothly.

In addition, in the case of administering a drug by penetrating the needle into the patient's skin, a separate driving energy source is omitted by generating positive or negative pressure using a movable plate that can move in a vacuum state inside the body where the needle is installed. Even if it is discharged naturally, energy efficiency can be increased.

In addition, since the drug is discharged as the needle is separated from the skin, the negative pressure generated in the skin can be minimized, thereby minimizing the sense of heterogeneity generated in the skin.

In the above, embodiments of the present invention have been described with reference to the accompanying drawings, but those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features. You will be able to understand. Therefore, the embodiments described above are illustrative in all respects, and should be understood as non-limiting.

100: main body
101: inlet
110: drug chamber
120: actuator
130: movable plate
140: one-way valve
150: needle

Claims (10)

main body;
An injection hole formed through the outer peripheral surface of the main body;
A drug chamber communicated so that a drug is injected through the injection port;
An actuator reciprocating along the longitudinal direction of the main body with a portion inserted into the inner side of the main body;
A movable plate coupled to one end of the actuator located inside the main body and installed in close contact with the inner wall of the main body;
A one-way valve formed on the movable plate and opened when the movable plate moves away from the skin by the actuator; And
And a needle communicating with the one-way valve and penetrating the skin to inject the drug,
It is formed through the movable plate, and includes a plurality of through holes formed in an area projected between the outer peripheral surface of the needle and the inner peripheral surface of the one-way valve,
The one-way valve is elastically deformed and opened to the skin side when pressure is applied from the through hole, and when pressure is applied from the skin side, the inner peripheral surface of the one-way valve is in close contact with the outer peripheral surface of the needle and closed Drug injection device with a needle. delete delete The method of claim 1,
An RF generator electrically connected to the needle is further included, and electrical energy generated from the RF generator is generated from the needle, and a drug injection device having a reciprocating needle. The method of claim 4,
A drug injection device having a reciprocating needle in which the RF generator is operated while the end of the needle penetrates the skin. delete delete main body;
An injection hole formed through the outer peripheral surface of the main body;
A drug chamber communicated so that a drug is injected through the injection port;
An actuator reciprocating along the longitudinal direction of the main body with a portion inserted into the inner side of the main body;
A movable plate coupled to one end of the actuator located inside the main body and installed in close contact with the inner wall of the main body;
A one-way valve formed on the movable plate and opened when the movable plate moves away from the skin by the actuator; And
And a needle communicating with the one-way valve and penetrating the skin to inject the drug,
The one-way valve includes an inner cap formed to surround an outer circumferential surface along the longitudinal direction of the needle and an outer cap formed to surround and have a larger diameter than the inner cap,
It is formed through the movable plate, and includes a plurality of through holes formed in an area projected between the outer peripheral surface of the needle and the inner peripheral surface of the inner cap,
When pressure is applied from the through hole, the inner cap is elastically deformed and opened to the skin side, and when pressure is applied from the skin side, the inner circumferential surface of the inner cap is in close contact with the outer circumferential surface of the needle and closed. Drug injection device with a needle. The method of claim 8,
A drug injection device having a reciprocating needle formed through the outer circumferential surface of the needle and including a plurality of flow holes formed on the outer circumferential surface between the inner cap and the outer cap. The method according to claim 1 or 8,
A drug injection device having a reciprocating needle installed at the injection port and further comprising a control valve that is opened when the movable plate moves in a direction approaching the skin side.

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