Drug injection tip, handpiece and skin treatment device

Description

BACKGROUND[TECHNICAL FIELD]

[0001] Embodiments of the inventive concept described herein relate to a medicine injecting tip, a hand piece, and a skin treating device, capable of invading a needle to a preset depth of a deep portion of a skin due to a pumping effect while injecting a medicine into an invaded part.[BACKGROUND ART]

[0002] Recently, a skin treating device has been developed for scar treatment, hair growth treatment, osmidrosis treatment, vascular treatment, fat reduction, wrinkle removal, skin elasticity recovery, sebum removal, and acne treatment. The skin treating device repeatedly invades a plurality of needles into a skin to remove a malignant tissue and to form a new tissue, thereby treat the skin of a target person.

[0003] Further, although not essential, a radio frequency is applied to a plurality of needles (in this case, electrical energy is applied to the needles in various manners without limitation to the radio frequency; meanwhile, in this case, the plurality of needles is called radio frequency (RF) needle electrodes).

[0004] A device employing a manner of transmitting a radio frequency to a skin tissue invades an RF needle electrode to a deep portion (for example, a derma layer) of the skin at a target point (for example, a face) by using a hand piece having a single or a plurality of RF needle electrodes, removes damaged collagen or elastic fiber from the deep portion of the skin at the target point and accelerates the regeneration of collagen or elastic fiber by using heat generated by the radio frequency. Furthermore, these skin treatment devices improve the pigmentation of the skin, acne marks, and wrinkles.

[0005] In this case, when a cutting edge of an end portion of a single or a plurality of RF needle electrodes is exposed and remaining portions of the RF needle electrodes are coated with an insulating material, a radio frequency is intensively transmitted to the deep portion of the skin (see FIG. 1; FIG. 1(1)) illustrates the case that a needle electrode is not coated with an insulating material, and FIG. 1(2) illustrates the case that a needle electrode is coated with an insulating material).

[0006] However, a dent having a predetermined curvature or a wrinkle is formed on the surface of the skin at the target point due to the pressure in the treatment. Accordingly, a plurality of needles is not invaded to a uniform depth. In other words, some of the plurality of needles fails to reach the deep portion of the skin at the target point, which causes a skin regeneration efficiency to be lowered.

[0007] Meanwhile, in the procedure of regenerating a skin using a plurality of needles, a medicine is applied to relieve pain or treat a fine wound caused when the plurality of needles are invaded into the deep portion of the skin.

[0008] In this case, it is effective to deeply inject a medicine into the invaded part so as to improve the efficiency of the medicine. However, it is difficult for a typical skin treating device to deeply inject the medicine into the invaded part.

[0009] Document EP 2 893 894 A2 discloses an endosurgical operating device and an endoscopic device comprising same. The endosurgical operating device comprises an operating tube installed in the insertion part of the endoscope that is to be inserted into the body, an operating plate which is inserted and installed in the operating tube and which has at least one needle having a pointed tip, a drive unit for driving the operating plate such that a plurality of needles protrude from the end of the operating tube and are inserted into the internal tissue or endothelial surface, and a power supply unit electrically connected to the plurality of needles. An endothelial adsorption means for adsorbing the epithelial layer of the endothelium is provided to enable the plurality of needles to easily reach the lower tissue of the epithelial layer, thus maximizing the effects of treating the endothelium using the plurality of needles.

[0010] Document US 2016 / 199581 A1 discloses a device and a method which allow force to be exerted on a compressible tissue in order to allow a needle to reach at least one of the layers of said tissue that could not have been reached by said needle without having compressed said tissue.[DETAILED DESCRIPTION OF THE INVENTION][TECHINICAL PROBLEM]

[0011] Embodiments of the inventive concept provide a medicine injecting tip according to claim 1, capable of injecting a medicine into a hole in a skin formed by a needle while invading the needle to a preset depth of a deep portion of the skin, a hand piece equipped with the medicine injecting tip, and a skin treatment device comprising the medicine injecting tip.

[0012] The objects of the inventive concept are not limited to the above, but other effects, which are not mentioned, will be apparently understood to those skilled in the art.[TECHNICAL SOLUTION]

[0013] According to an exemplary embodiment, a medicine injecting tip includes a cylinder, a plunger reciprocating downward and upward, and forming a first space and a second space inside the cylinder, and a needle disposed in the plunger and disposed in the second space of the cylinder. The needle is inserted into a skin when the plunger moves downward. The needle is discharged from the skin and a positive pressure state is formed in the second space, when the plunger moves upward.

[0014] A hole is formed in the skin as the needle is inserted into the skin and discharged from the skin, and a medicine is injected into the hole formed in the skin, when the second space is in the positive pressure state.

[0015] A negative pressure state is formed in the second space when the plunger moves downward.

[0016] A surface of the skin is pulled to the second space due to the negative pressure state of the second space such that the needle is invaded to a preset depth.

[0017] A first channel is formed in the medicine injecting tip to connect the first space with the second space.

[0018] The first channel is at least one of a flow path formed in the plunger, a gap between the cylinder and the plunger, and a tube connecting the first space with the second space.

[0019] As a variation in a volume of the first space is greater than a variation in a volume of the second space when the plunger reciprocates, a gas in the second space moves into the first space through the first channel when the plunger moves downward, and gas in the first space moves into the second space through the first channel when the plunger moves upward.

[0020] A valve is disposed in the cylinder to connect an outside with the first space in an open state of the valve.

[0021] The valve is open in the negative pressure state of the first space to introduce external air into the first space, and is closed in the positive pressure state of the first space to block air in the first space from leaking to the outside.

[0022] The valve is open when the plunger moves downward, and is closed when the plunger moves upward.

[0023] The cylinder includes a first cylinder and a second cylinder, the plunger includes a first plunger forming the first space and a redundant space in the first cylinder, and a second plunger forming the second space in the second cylinder, and a second channel is formed in the first cylinder to connect the redundant space with an outside.

[0024] A third channel is formed in the first plunger to connect the first space with the redundant space.

[0025] A fourth channel is formed in the cylinder to connect the first space with an outside.

[0026] The fourth channel is open due to movement of the plunger when the plunger moves downward, and is closed due to the movement of the plunger when the plunger moves upward.

[0027] A fifth channel is formed in the cylinder to connect the first space with an outside.

[0028] The fifth channel is open due to movement of the plunger when the plunger moves downward, and is closed due to the movement of the plunger when the plunger moves upward.

[0029] A radio frequency is applied to the needle.

[0030] The radio frequency applied to the needle generates thermal energy in a deep portion of the skin.

[0031] According to an exemplary embodiment, a hand piece is mounted on the medicine injecting tip.

[0032] According to an exemplary embodiment, a skin treating device injects a medicine into a deep portion of a skin of a patient using the medicine injecting tip.[ADVANTAGEOUS EFFECTS OF THE INVENTION]

[0033] According to the inventive concept, the medicine is injected into the hole formed in the surface of the skin by the needle in the positive pressure state and the skin is pulled in the negative pressure state, so the needle is inserted to a preset depth.

[0034] Further, according to the inventive concept, the hand piece equipped with the medicine injecting tip and the skin treating device using the medicine injecting tip are provided.

[0035] The effects of the inventive concept are not limited to the above, but other effects, which are not mentioned, will be apparently understood to those skilled in the art.[DESCRIPTION OF THE DRAWINGS]

[0036] FIG. 1 is a schematic view illustrating that a radio frequency is applied using RF needles; FIG. 2 is a perspective view illustrating a skin treating device, according to the inventive concept; FIG. 3 is a perspective view illustrating a hand piece, according to the inventive concept; FIG. 4 is a sectional view illustrating a medicine injecting tip, according to the inventive concept; FIG. 5 is a sectional view illustrating a pumping effect made as the medicine injecting tip works, according to the inventive concept; FIG. 6 is a sectional view illustrating a pumping effect made as a medicine injecting tip works, according to a first modification of the inventive concept; FIG. 7 is a sectional view illustrating a pumping effect made as a medicine injecting tip works, according to a second modification of the inventive concept; FIG. 8 is a sectional view illustrating a pumping effect made as a medicine injecting tip works, according to a third modification of the inventive concept; FIG. 9 is a sectional view illustrating a pumping effect made as a medicine injecting tip works, according to a fourth modification of the inventive concept; FIG. 10 is a sectional view illustrating a pumping effect made as a medicine injecting tip works, according to a fifth modification of the inventive concept; FIG. 11 is a sectional view illustrating a pumping effect improved due to a groove and a seat formed in a second cylinder in a medicine injecting tip according to the inventive concept; and FIG. 12 is a flowchart illustrating a method for treating a skin using a medicine injecting tip according to the inventive concept. [BEST MODE]

[0037] Advantage points and features of the inventive concept and a method of accomplishing thereof will become apparent from the following description with reference to the following figures, wherein embodiments will be described in detail with reference to the accompanying drawings. However, the inventive concept is embodied in various different forms, and should not be construed as being limited only to the illustrated embodiments. Rather, these embodiments are provided as examples so that this disclosure will be thorough and complete, and will fully convey the concept of the inventive concept to those skilled in the art. The inventive concept is defined by scope of the claims.

[0038] The terminology used in the inventive concept is provided for the illustrative purpose, but the inventive concept is not limited thereto. As used herein, the singular terms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, it will be further understood that the terms "comprises", "comprising," "includes" and / or "including", when used herein, specify the presence of stated components, but do not preclude the presence or addition of one or more other components. The same reference numerals will be assigned to the same component throughout the whole specification, and "and / or" refers to that components described include not only individual components, but at least one combination of the components. It will be understood that, although the terms "first", "second", etc., is used herein to describe various components, these components should not be limited by these terms. These terms are only used to distinguish one component from another component. Thus, a first component to be described below is a second component without departing from the teachings of the inventive concept.

[0039] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning in other words consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0040] Spatially relative terms, such as "below", "beneath", "lower", "above", "upper", and the like, is used herein for ease of description to describe one component or feature's relationship to another component(s) or feature(s) as illustrated in accompanying drawings. It will be understood that the spatially relative terms are intended to encompass different orientations of the components in use or operation in addition to the orientation depicted in the drawings. For example, when a component illustrated in accompanying drawings is reversed, a component provided 'below' or 'beneath' another component is placed 'above' another component. Accordingly, the term "below" includes both concepts of "below" and "above. A component is oriented in a different direction. Accordingly, terminology having relatively spatial concepts is variously interpreted depending on orientations.

[0041] Hereinafter, a skin treating device 1000 according to the inventive concept will be described with reference to accompanying drawings. FIG. 1 is a schematic view illustrating that a radio frequency is applied using RF needles. FIG. 2 is a perspective view illustrating a skin treating device, according to the inventive concept. FIG. 3 is a perspective view illustrating a hand piece, according to the inventive concept. FIG. 4 is a sectional view illustrating a medicine injecting tip, according to the inventive concept. FIG. 5 is a sectional view illustrating a pumping effect made as the medicine injecting tip works, according to the inventive concept. FIG. 6 is a sectional view illustrating a pumping effect made as a medicine injecting tip works, according to a first modification of the inventive concept. FIG. 7 is a sectional view illustrating a pumping effect made as a medicine injecting tip works, according to a second modification of the inventive concept. FIG. 8 is a sectional view illustrating a pumping effect made as a medicine injecting tip works, according to a third modification of the inventive concept. FIG. 9 is a sectional view illustrating a pumping effect made as a medicine injecting tip works, according to a fourth modification of the inventive concept. FIG. 10 is a sectional view illustrating a pumping effect made as a medicine injecting tip works, according to a fifth modification of the inventive concept. FIG. 11 is a sectional view illustrating a pumping effect improved due to a groove and a seat formed in a second cylinder in a medicine injecting tip according to the inventive concept.

[0042] Hereinafter, the term "vertical direction" is a vertical direction illustrated in FIG. 4, and is used interchangeably with the term "up-and-down direction". One side in the "vertical direction" is an upper portion, and another side in the "vertical direction" is a lower portion.

[0043] According to the inventive concept, a skin treating device 1000 is used for scar treatment, hair growth treatment, osmidrosis treatment, vascular treatment, fat reduction, wrinkle removal, skin elasticity recovery, sebum removal, and acne treatment.

[0044] According to the inventive concept, a skin treating device 1000 includes a main body 100, a display module 200, an operating module 300, an electronic control module (not illustrated), a cable 400, a hand piece 500, a medicine injecting tip 600 for injecting a medicine, a driving module 700, and a power supply module (not illustrated).

[0045] The main body 100 includes the display module 200 and the operating module 300. The display module 200 is manufactured in the form of a panel to visually provide various piece of information to a doctor instructing a skin care procedure. Therefore, for example, the display module 200 displays, in the form of a graph, the output level or an impedance of the radio frequency applied to a dermal layer of a present target point. In addition, the display module 200 displays an operating mode currently being performed by the skin treating device 1000 according to the inventive concept. In addition, the display module 200 displays biometric information of a deep portion of the skin tissue at the target point.

[0046] The operating module 300 is provided in the form of a button on the outer surface of the main body 100. The doctor turns on / off the skin treating device 1000 through the operating module 300, select an operating mode of the skin treating device 1000, and change an output level of the radio frequency applied to a target point.

[0047] Meanwhile, when the display module 200 is provided in the form of a touch screen, at least a portion of the operating module 300 is omitted. In this case, the doctor operates the skin treating device by touching a menu displayed on the screen of the display module 200.

[0048] An electronic control module (not illustrated) is embedded in the main body 100 to electronically control components of the skin treating device 1000. To this end, the electronic control module is electrically connected with the driving module 700 and the power supply module through a cable 400. In other words, the electronic control module applies a control signal, which corresponds to an operating signal applied by a doctor, to the driving module 700 and the power supply module, in response to the operation signal by the doctor.

[0049] For example, a driving period of the driving module 700 is controlled through a control signal of the electronic control module. Accordingly, the reciprocating driving period of the needle unit 620 of the medicine injecting tip 600 is controlled.

[0050] In addition, the output level of the power module is controlled through the electronic control signal of the electronic control module. Therefore, the wavelength, direction, and intensity of a current applied to at least one needle 621 of the needle unit 620 is changed, and thus the output level of the radio frequency applied to the target point is controlled.

[0051] Meanwhile, according to the inventive concept, a radio frequency does not have to be essentially applied to the at least one needle 621 in the skin treating device 1000. In other words, electric energy is not applied to the at least one needle 621 based on a treatment purpose, a treatment effect, and an economical effect.

[0052] A cable 400 performs the same function as that of the conductive line to connect the electronic control module with the driving module 700 or to connect the electronic control module with the power module. To this end, the cable 400 extends to one side from the main body 100 to connect the main body 100 with the hand piece 500. The cable 400 includes a plurality of wires provided therein to form channels depending on types of electrical signals, and the outer skin of the cable 400 and the second cable insulates and covers a bundle of wires having various channels.

[0053] The hand piece 500 is a part held by the doctor. In addition, the doctor changes the target point (e.g., a part of the face) by moving the hand piece 500 in contact with the skin of a target person. The hand piece 500 is disposed on the cable 400 and is positioned at an end portion of the cable 400 in the extending direction of the first cable 400.

[0054] The hand piece 500 is provided therein with the driving module 700 and the power supply module. Accordingly, the cable 400 electrically connects the driving module 700 and the power supply module, which are provided in the hand piece 500, with an electronic control module provided in the main body 100. The medicine injecting tip 600 is mounted on the end portion of the hand piece 500. In this case, the medicine injecting tip 600 is mounted on the end portion of the hand piece 500 to be replaceable in the form of a cartridge form.

[0055] The hand piece 500 is provided at an outer portion thereof with a first conductive member 501 to electrically the needle unit 620 of the medicine injecting tip 600 with the power supply module and a second conductive member 502 docked on a cable connector 503 to electrically the power module to the cable 400. In this case, the first conductive member 501 and the second conductive member 502 is manufactured in the form of a film. For example, the first conductive member 501 and the second conductive member 502 is flexible printed circuit boards (FPCB). The needle unit 620 of the medicine injecting tip 600 reciprocates (drive), which is described below. The conductive line of the needle unit 620 of the medicine injecting tip 600 and the power supply module and the conductive line of the power supply module and the cable 400 is provided at the outer portion of the hand piece 500 such that the conductive lines are prevented from interrupting the reciprocation of the needle unit 620 of the medicine injecting tip 600.

[0056] The medicine injecting tip 600 is a member to apply a radio frequency to the deep portion of the skin at the target point. The medicine injecting tip 600 is detachably mounted to an end portion of hand piece 500. In other words, the medicine injecting tip 600 of the inventive concept is manufactured in the form of a cartridge and thus is replaceable with new one.

[0057] The medicine injecting tip 600 includes a cylinder 610 and the needle unit 620. The cylinder 610, which serves as a stator, is a member detachably mounted on the end portion of the hand piece 500. The needle unit 620, which serves as an actuator (moving in a vertical direction), includes at least one needle 621 to be invaded into the deep portion of the skin at the target point at a specific period (the driving period of the driving module). If necessary, the needle unit 620 is a member which applies the radio frequency (RF) to the dermal layer of the skin.

[0058] The cylinder 610 is hollowed in the vertical direction. The needle unit 620 is disposed in the inner space of the cylinder 610. The bottom surface of the cylinder 610 is open, and the lower end portion of the cylinder 610 is disposed on the surface of the skin at the target point. Thus, the open portion of the cylinder 610 is closed by the surface of the skin at the target point.

[0059] The cylinder 610 includes a first cylinder 611 and a second cylinder 612. In this case, the first cylinder 611 is positioned at an upper portion of the cylinder 610, and the second cylinder 612 is positioned at the lower portion of the cylinder 610. The lower end portion of the first cylinder 611 and the upper end portion of the second cylinder 612 is connected with each other. The bottom surface of the second cylinder 612 is open.

[0060] The needle unit 620 is disposed inside the first cylinder 611 and the second cylinder 612, and the connecting portion between the first cylinder 611 and the second cylinder 612 is closed by the needle unit 620.

[0061] A connecting rod 625 of the needle unit 620 passes through the top surface of the first cylinder 611. In the first cylinder 611, a first space 1 and a redundant space 1-1 is formed by the first plunger 623-1 of the needle unit 620. In other words, the inner space of the first cylinder 611 is closed in the vertical direction by the first plunger 623-1 of the needle unit 620, and is divided into the first space 1 positioned at the upper portion thereof and the redundant space 1-1 positioned at the lower portion thereof.

[0062] To maintain the airtightness of the first space 1 of the first cylinder 611, a gasket 626 is disposed between a top surface of the first cylinder 611 and the connecting rod 625 of the needle unit 620. In addition, the gasket 626 is interposed between the inner circumferential surface of the first cylinder 611 and the outer circumferential surface of the first plunger 623-1 of the needle unit 620.

[0063] The lower end portion of the second cylinder 612 is disposed on the surface of the skin at the target point. Thus, the open portion of the bottom surface of the second cylinder 612 is closed by the surface of the skin of the target point. The second cylinder 612 has a second space 2 having a bottom surface open by the second plunger 623-2 of the needle unit 620. The inner space of the second cylinder 612 is closed in the vertical direction by the second plunger 623-2 of the needle unit 620, and provided at an upper portion thereof with a holder 622 of the needle unit 620 and the second plunger 623-2 of the needle unit 620, and provided at a lower portion thereof with the second space 2 having a bottom surface which is open.

[0064] One or more grooves 612-1 is formed in the bottom surface of the second cylinder 612 (see FIG. 3). The one or more grooves 612-1 of the second cylinder 612 is formed from an inner circumferential surface of the second cylinder 612 to the outer circumferential surface of the second cylinder 612. In other words, the one or more grooves 612-1 of the second cylinder 612 is formed through the second cylinder 612. In addition, the at least one or more grooves 612-1 of the second cylinder 612 is arranged to be spaced apart from each other along the circumference of the bottom surface of the second cylinder 612. In other words, the one or more grooves 612-1 of the second cylinder 612 is formed to be spaced apart from each other in the circumferential direction.

[0065] Meanwhile, as described above, the open portion of the bottom surface of the second space 2 is closed by the surface of the skin at the target point. In this case, to maintain the airtightness of the second space 2, the gasket 626 is interposed between the inner circumferential surface of the second cylinder 612 and the outer circumferential surface of the second plunger 623-2 of the needle unit 620. Meanwhile, in the state that the airtightness of the second space 2 is maintained, only the lower end portion of the second space 2 is selectively connected with an outside by one or more grooves 612-1 of the second cylinder 612, to increase the pumping effect described later.

[0066] One or more needles 621 of the needle unit 620 is disposed in the second space 2. As described above, since the bottom surface of the second space 2 is open, the one or more needles 621 enter the surface of the skin at the target point through the open portion of the second space 2.

[0067] The sectional area, which is perpendicular to the vertical direction, of the first cylinder 611 is larger than the sectional area, which is perpendicular to the vertical direction, of the second cylinder 612. Therefore, as the plunger 623 of the needle unit 620 reciprocates in the vertical direction, the variation in the volume of the first space 1 of the first cylinder 611 is greater than the variation in the volume of the second space 2 of the second cylinder 612

[0068] The cylinder 610 further includes a seat 613 (see FIG. 11). The seat 613 is positioned in the second space 2. The seat 613 is disposed to be inclined inward and downward from the inner circumferential surface of the second cylinder 612. The seat 613 is disposed in a ring shape along the inner circumferential surface of the second cylinder 612. In this case, according to the inventive concept, the seat 613 is disposed along the circumference of one or more needles 621 of the needle unit 620, similarly to the form of a "valve seat". In other words, the seat 613 covers the circumference of one or more needles 621 of the needle unit 620.

[0069] The outer end portion of the seat 613 is a fixed end, and the inner end portion of the seat 613 is a free end. Therefore, the downward inclination angle of the seat 613 is varied by the flow of air around the seat 613. To improve the variable action of the inclination angle, the seat 613 is formed of an elastic material.

[0070] The outer end of the seat 613 is disposed above the one or more grooves 612-1 of the second cylinder 612. As a result, the inclination angle of the seat 613 varies depending on the flow of air flowing through the one or more grooves 612-1 of the second cylinder 612. The seat 613 interacts with one or more grooves 612-1 of the second cylinder 612 to increase the pumping effect described below.

[0071] The needle unit 620 is disposed in the cylinder 610. The needle unit 620 reciprocates in the vertical direction by the driving module 700. In other words, the needle unit 620 is disposed inside the first cylinder 611 and the second cylinder 612, and reciprocates like a "piston". In addition, the plunger 623 is provide to divide the inner surface of the first and second cylinders 611 and 612, and varies the volume of the inner space of the first cylinder 611 and the second cylinder 612.

[0072] In addition, the needle unit 620 generates a radio frequency in the deep portion of the skin at the target point, and recovers the collagen and the elastic fiber, which are damaged by the thermal energy of the radio frequency, over time so the elasticity of the skin is increased.

[0073] The needle unit 620 includes one or more needles 621, the holder 622, the plunger 623, and the connecting rod 625.

[0074] As the one or more needles 621 reciprocate together with the plunger 623, the one or more needles 621 is alternately inserted into or discharged from the skin. The radio frequency is applied to the one or more needles 621 such that thermal energy is generated in the deep portion of the skin at the target point.

[0075] However, the inventive concept is not limited thereto, and one or more needles 621 is applied with electric energy and ultrasonic waves having various wavelength bands in addition to the radio frequency. Furthermore, as described above, the electrical energy or ultrasonic wave is not applied to one or more needles 621.

[0076] When electrical energy such as a radio frequency is applied to the one or more needles 621, the one or more needles 621 are electrically connected with the power supply module to receive power. To this end, the one or more needles 621 is electrically connected with the power supply module by the first conductive member 501 described above.

[0077] Meanwhile, the one or more needles 621 is a bipolar type electrode unit in which a plurality of electrodes have two polarities, and a radio frequency is generated between neighboring electrodes, and or a monopolar type electrode unit in which all of the plurality of electrodes have the same polarity. Meanwhile, when the one or more needles 621 is in a monopolar type, a ground electrode module (not illustrated) is additionally provided to reflux the radio frequency generated from the one or more needles 62.

[0078] The one or more needles 621 is supported by the holder 622. The one or more needles 621 extend downward in the holder 622. The one or more needles 621 is disposed in the second space 2 of the second cylinder 612.

[0079] The one more needles 621 reciprocate in the vertical direction by the driving force of the driving module 700. The lower end portions of the one or more needles 621 at the bottom dead center is disposed on the deep portion of the skin at the target point, and the lower end portions of the one or more needles 621 at the top dead center is disposed on the surface of the skin at the target point.

[0080] Thus, the one or more needles 621 is repeatedly invaded into the deep portion of the skin at the target point. In this case, the one or more needles 621 protrude downward through the open portion formed in the bottom surface of the second space 2 of the second cylinder 612 and then return upward. Meanwhile, the depth of invasion of the one or more needles 621 is approximately 2.1 mm.

[0081] The holder 622 is a member supporting the one or more needles 621. The holder 622 is disposed in the second space 2 of the second cylinder 612, similarly to the one or more needles 621. In addition, the holder 622 is disposed on the bottom surface of the second plunger 623-2, and is coupled to the second plunger 623-2. Furthermore, if necessary, the holder 622 is omitted. In this case, one or more needles 621 is disposed directly on the plunger 623.

[0082] The plunger 623 reciprocates downward or upward to form the first space 1 and the second space 2 in the cylinder 610. In addition, a first channel 3 connecting the first space 1 with the second space 2 is formed in the plunger 623.

[0083] The variation in the volume of the first space 1 is greater than the variation in the volume of the second space 2 in the reciprocating movement of the plunger 623, so the gas in the second space 2 moves into the first space 1 through the first channel 3 when the plunger 623 moves downward, and the gas in the first space 1 moves into the second space 2 through the first channel 3 when the plunger 623 moves upward.

[0084] Accordingly, the one or more needles 621 are invaded into the skin, and a negative pressure state is formed in the second space 2 (pressure is decreased) when the plunger 623 moves downward. When the plunger 623 moves upward, the one or more needles 621 are discharged from the skin, and a positive pressure state is formed in the second space 2 (pressure is increased).

[0085] The plunger 623 includes the first plunger 623-1 and the second plunger 623-2. The first plunger 623-1 is disposed in an inner space of the first cylinder 611. The first plunger 623-1 closes the inner space of the first cylinder 611 in the vertical direction, and forms the first space 1 positioned at the upper portion of the first cylinder 611 and the redundant space positioned at the lower portion of the first cylinder 611.

[0086] The first plunger 623-1 reciprocates in the vertical direction by the driving force of the driving module 700. When the first plunger 623-1 moves downward, the volume of the first space 1 is increased, and the volume of the redundant space 1-1 is decreased (see FIG. 5(1)). When the first plunger 623-1 moves upward, the volume of the first space 1 is decreased, and the volume of the redundant space 3 is increased (see FIG. 5(2)).

[0087] The second plunger 623-2 is positioned in the inner space of the second cylinder 612. The second plunger 623-2 closes the inner space of the second cylinder 612 in the vertical direction to form the second space 2 in the second cylinder 612.

[0088] The second plunger 623-2 reciprocates in the vertical direction by the driving force of the driving module 700. When the second plunger 623-2 moves downward, the volume of the second space 2 is decreased (see FIG. 5(1)). When the second plunger 623-2 moves upward, the volume of the second space 2 is increased (see FIG. 5(2)).

[0089] The first channel 3 connecting the first space 1 with the second space 2 is formed in the first plunger 623-1 and the second plunger 623-2. In this case, the first channel 3 formed in the first plunger 623-1 and the second plunger 623-2 is one or more flow paths 3-1 passing through (formed through) the first plunger 623-1 and the second plunger 623-2 in the vertical direction.

[0090] The connecting rod 625 is disposed at an upper portion of the first plunger 623-1. The connecting rod 625 moves in the vertical direction by the driving force of the driving module 700. The connecting rod 625 is connected to the driving module 700 and the first plunger 623-1 to transmit a driving force of the driving module 700 to the first plunger 623-1.

[0091] Hereinafter, the operation (pumping effect) of the medicine injecting tip 600 will be described with reference to FIG. 5. When the skin treating device 1000 of the inventive concept is operated, the needle unit 620 reciprocates in the vertical direction (up-down direction), and repeatedly invades the skin at the target point (when a radio frequency is applied, thermal energy is generated in the deep portion of the skin). Meanwhile, a medicine is applied to the surface of the skin at the target point to alleviate the pain caused by invasion or to promote the regeneration of the wound.

[0092] When the needle unit 620 moves downward, the volume of the first space 1 is increased and the volume of the second space 2 is decreased. In this case, the variation in the volume of the first space 1 is greater than the variation in the volume of the second space 2 due to the difference in the sectional area, which are perpendicular to the vertical direction, between the first space 1 and the second space 2. In other words, the increment in the volume of the first space 1 is greater than the decrement in the volume of the second space 2. Meanwhile, since the first space 1 and the second space 2 are connected with each other through the first channel 3, the gas in the second space 2 moves into the first space 1 through the first channel 3 (see FIG. 5(1); the movement of the gas due to the pressure difference resulting from the difference between volume variations). Thus, the second space 2 is in a "negative pressure state (pressure decreased; to the contrary, the first space is in a positive pressure state as pressure is increased)" to suction the surface of the skin at the target point, and the height of the skin of the surface at the target point is made uniform. Accordingly, the one or more needles 621 is invaded into the skin to a uniform depth (the invasion effect to the uniform depth; all the plurality of needles irradiate a radio frequency at the invasion depth (preset depth) satisfying the medical design condition)

[0093] When the needle unit 620 moves upward, the volume of the first space 1 is decreased and the volume of the second space 2 is increased. In this case, the variation in the volume of the first space 1 is greater than the variation in the volume of the second space 2 due to the difference in the sectional area, which are perpendicular to the vertical direction, between the first space 1 and the second space 2. In other words, the increment in the volume of the first space 1 is greater than the decrement in the volume of the second space 2 of the second cylinder 612. Meanwhile, since the first space 1 and the second space 2 are connected with each other through the first channel 3, the gas in the first space 1 moves into the second space 2 through the first channel 3 (see FIG. 5(2); the movement of the gas due to the pressure difference resulting from the difference between volume variations). Thus, the second space 2 is in a "positive pressure state (pressure increased; to the contrary, the first space is in a negative pressure state as pressure is decreased)" , so the medicine applied to the surface of the skin at the target point is deeply injected into the invasion part (a hole formed as the needle electrode is inserted and discharged) (an effect of deeply injecting the medicine into the deep portion of the skin)

[0094] Meanwhile, a second channel 4 connecting the redundant space 1-1 with an outside is formed in the first cylinder 611. The second channel 4 prevents the pressure of the gas in the redundant space 1-1 from interfering with the reciprocating movement of the first plunger 623-1 in the vertical direction. In other words, when the needle unit 620 moves downward, air in the redundant space 1-1 flows out to remove the resistance.

[0095] Hereinafter, a medicine injecting tip 1600 according to the first modification of the inventive concept and a medicine injecting tip 2600 according to the second modification of the inventive concept will be described with reference to FIGS. 6 and 7. The first channel 3 according to the inventive concept has various shapes in addition one or more flow paths 3-1 formed in the above-described plunger 623.

[0096] As illustrated in FIG. 6, in the medicine injecting tip 1600 of the first modification of the inventive concept, the first channel 3 has a gap 3-2 between the cylinder 610 and the plunger 623. In this case, according to the inventive concept, it is preferred that the above-described second channel 4 is not formed. Alternatively, the gasket 626 between the cylinder 610 and the plunger 623 is omitted or the gap 3-2 between the cylinder 610 and the plunger 623 is formed in the gasket 626 between the cylinder 626 and the plunger 623.

[0097] In addition, as illustrated in Figure 7, in the medicine injecting tip 2600 according the second modification of the inventive concept, the first channel 3 is a tube 303 connecting the first space 1 and the second space 2. In other words, in the second modification of the inventive concept, the first channel 3 is provided as a separate member.

[0098] Meanwhile, according the inventive concept, the shape of the first channel 3 is a combination (at least one) of the flow path 3-1, the gap 3-2, and the tube 3-3.

[0099] Hereinafter, a medicine injecting tip 3600 according to the third modification of the inventive concept, a medicine injecting tip 4600 according to the fourth modification of the inventive concept, and a medicine injecting tip 5600 according to the fifth modification of the inventive concept will be described with reference to FIGS. 8, 9, and 10. The third to fifth modifications of the inventive concept relate to that the higher positive pressure state is formed in the second space 2 of the inventive concept.

[0100] To this end, a valve 5 is provided in the medicine injecting tip 3600 according to the third modification of the inventive concept. The valve 5 connects the outside and the first space 1 in the open state. In addition, the valve 5 is open when the plunger 623 moves downward (open in a negative pressure state of the first space), thereby allowing external air to flow into the first space 1. To the contrary, the valve 5 is closed (closed in a positive pressure state of the first space) when the plunger 623 moves upward, thereby preventing air from flowing out of the first space 1. Accordingly, when the plunger 623 moves down, air introduced from the outside is additionally accumulated in the first space 1. When the plunger 623 moves up, the external air additionally accumulated in the first space moves into the second space 2 to increase the positive pressure of the second space 2 (the medicine is increasingly injected due to the pumping effect).

[0101] Meanwhile, the opening and closing of the valve 5 is not limited to being driven by electric, but is driven automatically. For example, when the valve 5 which is structurally open only in one direction (the direction in which external air is introduced the first space) is used, the valve 5 is automatically open only in the negative pressure state of the first space 1.

[0102] In addition, in a medicine injecting tip 4600 according to the fourth modification of the inventive concept, at least one of a third channel 6 connecting the first space 1 and the redundant space 1-1, or the fourth space 7 connecting the first space 1 with an outside is formed. In this case, as in the third modification of the inventive concept, when the plunger 623 moves downward, external air is introduced into the first space 1 through the third channel 6 and the fourth channel 7 and accumulated. When the plunger 623 moves upward, the external air accumulated in the first space moves into the second space 2 to increase the positive pressure of the second space 2 (the medicine is increasingly injected due to the pumping effect).

[0103] Meanwhile, the fourth channel 7 is open without being overlapped with the plunger 623 (especially, the first plunger) when the plunger 623 moves down. When the plunger 623 moves up, the fourth channel 7 is overlapped with the plunger 623 (especially, the first plunger) to be closed (open or closed due to the movement of the plunger).

[0104] This is to fully move the air in the first space 1 into the second space 2 by preventing the air from leaking out of the first space 1 when the plunger 623 moves up. Differently, when the plunger 623 moves up, since external air is introduced into the redundant space 1-1, the leakage of the external air through the third channel 6 is slight even if the third channel 6 is not closed.

[0105] In addition, in a medicine injecting tip 5600 according to the fifth modification of the inventive concept, a fifth channel 8 connecting the outside with the first space 1 is formed instead of the redundant space 1-1, which is different from the medicine injecting tip 600 described above.

[0106] The fifth channel 8 is open as the plunger 623 moves and allows external air to be accumulated in the first space 1, when the plunger 623 moves down. When the plunger 623 moves up, the fifth channel 8 is closed as the plunger 623 move, such that the air in the first space 1 is fully moved into the second space 2, thereby increasing the positive pressure of the second space 2 (the medicine is increasingly injected due to the pumping effect).

[0107] Meanwhile, it should be noticed by those skilled in the art that the above-described technical features according to the inventive concept and the technical features of the first to fifth modifications is combined within a technical scope of the inventive concept.

[0108] The driving module 700 is provided in the hand piece 500 and provides driving force for reciprocating the needle unit 620 of the medicine injecting tip 600. Various type of driving devices is used as the driving device of the driving module 700. As an example, the driving module 700 includes a pneumatic cylinder or includes a linear motor.

[0109] The power supply module is provided in the hand piece 500 and supplies power to one or more needles 621. In this case, the power supply module supplies DC power or AC power to the one or more needles 621. The power supply module is electrically connected with the one or more needles 621 through the first conductive member 501, and is electrically connected with the cable 400 through the second conductive member 502. Accordingly, the power supply module receives a control signal of the electronic control module through the cable 400 and apply power corresponding thereto to the one or more needles 621

[0110] The following description will be made with reference to FIG. 11 regarding that the pumping effect of the medicine injecting tip 600 is improved. when one or more grooves 612-1 are formed and a seat 613 is added in the second cylinder 612.

[0111] When the needle unit 620 moves down, external gas is introduced into the second space 2 and moved into the first space 1 through one or more grooves 612-1 of the second cylinder 612. The seat 613 is pushed upward due to the flow of the external gas, so the downward inclination angle is reduced. Therefore, the seat 613 does not block the flow of the external gas introduced through the one or more grooves 612-1 of the second cylinder 612. Accordingly, the flow of the gas from the second space 2 to the first space 1 is accelerated by the flow of the external gas (the gas in the second space is pushed by the flow of the external gas and more rapidly moved into the first space), thereby improving the pumping effect (see FIG. 11(1)).

[0112] When the needle unit 620 moves up, the seat 613 is pushed downward by the flow of the gas in the second space 2, so the downward inclination angle is increased. Accordingly, the seat 613 blocks the gas in the second space 2 from being discharged to the outside through the one or more grooves 612-1 of the second cylinder 612. Accordingly, the positive pressure formed in the second space 2 is increased (the external gas having moved into the first space when the needle unit is moved downward is moved again into the second space when the needle unit is moved upward and blocked from being discharged to the outside, thereby increasing the positive pressure), thereby improving the pumping effect (see FIG. 11(2)).

[0113] Hereinafter, a method for treating a skin using the medicine injecting tip 600 according to the inventive concept will be described with reference to FIG. 12.

[0114] According to the inventive concept, the method for treating the skin includes forming a negative pressure state in the second space 2 by moving downward one or more needles 621 and a plunger 623 (needle electrode inserted) (S100); applying, by the one or more needles 621, a radio frequency to a deep portion of a skin at a target point (S200); and forming a positive pressure state in the second space 2 by moving the one or more needles 621 and the plunger 623 upward (needle discharged) (S300).

[0115] In the forming of the negative pressure state in the second space 2 (S100), the one or more needles 621 is inserted into the skin, and the surface of the skin is pulled to the second space 2 as the second space 2 is in the negative pressure state, such that the surface of the skin is uniformly provided. Accordingly, one or more needles 621 is invaded to a preset depth, and the treatment effect is improved.

[0116] In the applying, by the one or more needles 621, the radio frequency to the deep portion of the skin (S200), thermal energy is generated into the deep portion of the skin to remove the waste tissue of the skin (skin regeneration and healing effect).

[0117] In addition, in the forming of the positive pressure state in the second space 2 (S300), the one or more needles 621 are discharged from the skin such that the medicine is injected into the hole formed in the skin. The hole is formed in the skin as the one or more needles 621 are inserted and discharged, and the medicine is injected into the hole formed in the skin when the second space 2 is the positive pressure state.

[0118] At the initial stage of the forming a positive pressure state in the second space 2 by moving the one or more needles 621 and the plunger 623 upward (S300), the second space 2 is set to be in the negative pressure state (the negative pressure state formed in S100), so the hole formed in the skin is spread. Thereafter, when the positive pressure state is formed in the second space 2, the medicine is injected into the spread hole in the state of receiving pressure, such that the medicine is deeply injected.

[0119] Although embodiments of the inventive concept have been described with reference to accompanying drawings, those skilled in the art should understand that various modifications are possible without departing from the technical scope of the inventive concept or without changing the subject matter of the inventive concept. Therefore, those skilled in the art should understand that the technical embodiments are provided for the illustrative purpose in all aspects and the inventive concept is not limited thereto.

Claims

1. A medicine injecting tip (600) comprising: a cylinder (610); a plunger (620; 623); and a needle (621) disposed in the plunger, where the plunger (620; 623) configured to reciprocate downward and upward, and forming a first space (1) and a second space (2) inside the cylinder; a first channel (3) formed in the medicine injecting tip (600) and connecting the first space (1) and the second space (2); wherein the needle (621) is inserted into a skin when the plunger moves downward, wherein the needle is discharged from the skin, when the plunger moves upward, and wherein the needle is disposed in the second space (2), such that a hole is formed in the surface of the skin through which the needle (621) is inserted into and discharged from the skin, wherein a variation in a volume of the first space (1) is greater than a variation in a volume of the second space (2) when the plunger reciprocates, wherein a negative pressure state being formed in the second space (2) when the plunger moves downward, wherein a surface of the skin is pulled to the second space (2) due to the negative pressure state of the second space (2) such that the needle is invaded to a preset depth, and wherein a positive pressure is formed around the hole in the second space (2) by moving the plunger (620; 623) upward to discharge the needle (621) from the skin to inject the medicine applied to the skin into the hole when the needle is discharged from the hole by the positive pressure formed around the hole in the second space (2), and wherein the needle (621) is reciprocated in the vertical direction by a driving module (700).

2. The medicine injecting tip of claim 1, wherein a valve is disposed in the cylinder to connect an outside with the first space (1) in an open state of the valve.

3. The medicine injecting tip of claim 1, wherein the valve is open in the negative pressure state of the first space (1) to introduce external air into the first space (1) and is closed in the positive pressure state of the first space (1) to block air in the first space (1) from leaking to the outside.

4. The medicine injecting tip of claim 3, wherein the valve is open when the plunger moves downward and is closed when the plunger moves upward.

5. The medicine injecting tip of claim 1, wherein the cylinder includes a first cylinder and a second cylinder, wherein the plunger includes: a first plunger (623-1) forming the first space (1) and a redundant space in the first cylinder; and a second plunger (623-2) forming the second space (2) in the second cylinder, and wherein a second channel (4) is formed in the first cylinder to connect the redundant space with an outside.

6. The medicine injecting tip of claim 1, wherein the cylinder includes a first cylinder and a second cylinder, wherein the plunger includes: a first plunger forming the first space (1) and a redundant space in the first cylinder; and a second plunger forming the second space (2) in the second cylinder, and wherein a third channel (6) is formed in the first plunger to connect the first space (1) with the redundant space.

7. The medicine injecting tip of claim 1, wherein a fourth channel is formed in the cylinder to connect the first space (1) with an outside, and wherein the fourth channel (7) is open due to movement of the plunger when the plunger moves downward and is closed due to the movement of the plunger when the plunger moves upward.

8. The medicine injecting tip of claim 1, wherein a fifth channel is formed in the cylinder to connect the first space (1) with the outside, and wherein the fifth channel is open due to movement of the plunger when the plunger moves downward, and is closed due to the movement of the plunger when the plunger moves upward.

9. The medicine injecting tip of claim 1, wherein a radio frequency is applied to the needle, and wherein the radio frequency applied to the needle generates thermal energy in a deep portion of the skin.

10. A hand piece equipped with the medicine injecting tip according to one of claims 1 to 9.

11. A skin treating device (1000) provided for injecting a medicine into a deep portion of a skin of a patient using the medicine injecting tip according to one of claims 1 to 9.