Needle cartridge for skin treatment, and handpiece comprising same

Abstract

The present invention relates to a needle cartridge for skin treatment such as tattooing, skin regeneration, or skin care, and a handpiece comprising same. A needle cartridge for skin treatment according to an embodiment of the present invention comprises: a treatment needle for inserting a treatment liquid into the skin; a cartridge body for supporting the treatment needle to reciprocate; an elastic member for supporting the treatment needle by an elastic force in the cartridge body such that the treatment needle reciprocates in the cartridge body; and a treatment liquid filling outer skin for forming a filling space filled with the treatment liquid around the cartridge body to supply the treatment liquid to the cartridge body. The treatment liquid filling outer skin comprises: a treatment liquid injection port for injecting the treatment liquid into the filling space; an injection port stopper for opening / closing the treatment liquid injection port; and an air inlet port configured such that, if a pressure difference occurs with respect to the filling space due to depletion of the treatment liquid in the cartridge body, air is introduced into the filling space such that the treatment liquid is automatically supplied to the cartridge body. Therefore, the treatment liquid is automatically supplied until the treatment liquid is depleted, thereby providing convenience in operation.

Description

Needle cartridge for skin treatment and handpiece including the same

[0001] The present invention relates to a needle cartridge for skin treatment such as tattooing on the skin, skin regeneration, or skin care, and a handpiece including the same.

[0002] Generally, skin procedures refer to procedures such as tattooing for cosmetic or medical purposes, making wounds on the skin for the absorption of medicines or cosmetics, or making wounds for skin regeneration.

[0003] When performing a skin procedure, a needle is inserted into the skin to create a wound or to inject a treatment solution such as a medicine, cosmetic, or dye. However, if the practitioner directly applies the treatment solution to the needle and injects it, there is a problem in that the depth of the treatment solution that penetrates the skin is not uniform and the amount of the treatment solution that flows in is also not uniform.

[0004] To solve this problem, a tattooing device for tattooing, which is one of the skin treatments, has been disclosed in Korean Patent Publication No. 10-2022-032493 (published on March 15, 2022).

[0005] The above-mentioned conventional tattoo device includes a tattoo device main body including a setting unit for setting a needle withdrawal distance, a needle withdrawal speed, and a pigment injection amount, a tattoo control unit for individually controlling a needle withdrawal speed and a force for pushing the needle according to the needle withdrawal length, withdrawal speed, and pigment injection amount set by the setting unit to accurately inject a tattoo pigment into a target skin layer, and a handpiece having a needle drive unit that is coupled to the tattoo device main body and controls the driving of a needle mounted on the needle unit using a solenoid according to the control of the tattoo control unit.

[0006] The conventional tattoo device configured in this way automatically controls the depth at which the needle enters the skin to inject tattoo pigment into the precise skin layer, and breaks away from the existing tattoo machine's method of increasing force as the needle's up-and-down movement speed increases, and individually controls the speed and force (torque) between the needle's up-and-down movements to create a more controlled, precise dot and even tattoo.

[0007] However, the above-mentioned conventional tattoo device had the problem that ink had to be injected frequently and the ink filling part was open, so the filled ink easily leaked out.

[0008] To solve this problem, another conventional tattoo device is disclosed in Korean Patent Publication No. 10-2022-0164703 (published on December 13, 2022), entitled “Marking module of a device for coloring agent diagram and a device using the same.”

[0009] The above-mentioned conventional coloring agent application device has a storage portion for the coloring agent, and the storage portion is configured to communicate with the channel only in an area located downstream of the needle when the needle is positioned at the inserted position.

[0010] The conventional coloring agent application device configured in this way was able to eliminate the hassle of frequent ink refilling by refilling ink into a storage unit, and prevent ink from leaking due to the storage unit being blocked by the holding mechanism.

[0011] However, since the conventional coloring agent chart device must repeatedly pressurize the priming member each time the ink is consumed to supply the ink stored in the storage unit to the needle, not only is there the inconvenience of manual operation, but there is also the problem of ink being over-discharged or not supplied depending on the pressure of the operator because the operator supplies the ink by pressing the priming member.

[0012] In addition, there was a problem in the past where it was difficult to control the amount of solution to be injected because the needle penetration depth could not be set.

[0013] The present invention has been made to solve the above problems, and the problem to be solved by the present invention is to provide a needle cartridge for skin treatment and a handpiece including the same, which can easily fill the treatment liquid by forming a filling space in which the treatment liquid is filled around the periphery of the cartridge body through a treatment liquid filling outer shell, and automatically supply the treatment liquid to the cartridge body by causing air to flow into the filling space through an air inlet due to a pressure difference when the treatment liquid is consumed in the cartridge body, thereby eliminating the inconvenience of operation for supplying the treatment liquid and eliminating uneven supply amount.

[0014] In addition, the present invention provides a needle cartridge for skin treatment and a handpiece including the same, which is configured to prevent leakage of the treatment liquid by forming an air inlet formed in the treatment liquid filling outer shell at the lower part of the filling space and to introduce air into the filling space only when supplying the treatment liquid to the cartridge body, thereby maintaining a vacuum in the filling space and at the same time, simply configuring a structure for automatically supplying the treatment liquid, making it easy to manufacture and reducing the manufacturing cost.

[0015] In addition, the present invention aims to provide a needle cartridge for skin treatment and a handpiece including the same, which can prevent the occurrence of a treatment defect due to excessive discharge of treatment liquid by minimizing pressure change in the cartridge body by forming a pressure reducing hole through the cartridge body and a reciprocating treatment needle.

[0016] In addition, the present invention aims to provide a needle cartridge for skin treatment and a handpiece including the same, which can easily control the amount of treatment fluid penetration by adjusting the depth at which the treatment needle penetrates the skin by installing the needle stopper in a height-adjustable manner by screwing it onto the treatment fluid-filled outer skin, thereby controlling the depth at which the treatment needle penetrates the skin.

[0017] In addition, the present invention aims to provide a needle cartridge for skin treatment, which can control the penetration depth of a treatment needle by forming a stopper grip portion on a needle stopper to easily rotate the needle stopper, and a handpiece including the same.

[0018] According to an embodiment of the present invention for achieving the above-described object, a needle cartridge for skin treatment includes a treatment needle for penetrating a treatment liquid into the skin, a cartridge body for supporting the treatment needle to reciprocate, an elastic member for supporting the treatment needle in the cartridge body by elastic force to reciprocate the treatment needle in the cartridge body, and a treatment liquid filling outer shell for forming a filling space filled with a treatment liquid around the cartridge body for supplying the treatment liquid to the cartridge body, wherein the treatment liquid filling outer shell includes a treatment liquid injection port for injecting the treatment liquid into the filling space, an injection port stopper for opening and closing the treatment liquid injection port, and an air inlet port for introducing air into the filling space so that when the treatment liquid in the cartridge body is consumed and a pressure difference with the filling space occurs, air is introduced into the filling space and the treatment liquid is automatically supplied to the cartridge body.

[0019] The above air inlet may be formed at the bottom of the charging space so that when the treatment liquid is not supplied to the cartridge body, it is sealed by the treatment liquid, and air is introduced into the charging space only when a pressure difference occurs between the cartridge body and the charging space.

[0020] The above cartridge body may include a needle hole through which the treatment needle reciprocates and emerges, and a treatment fluid supply hole formed at a position close to the needle hole to supply the treatment fluid in the charging space to the needle hole.

[0021] The above cartridge body may include a pressure reducing hole through which air is circulated into the cartridge body to reduce changes in internal pressure according to the reciprocating movement of the needle in the cartridge body.

[0022] The above-mentioned treatment solution-filled outer skin may include a needle stopper that controls the penetration depth of the treatment needles by controlling the gap between the end where the treatment needles emerge and the skin.

[0023] The above-mentioned treatment liquid-filled outer shell may include a stopper fastening part for screw-fastening the needle stopper to the treatment liquid-filled outer shell so as to adjust the gap between the end of the treatment liquid-filled outer shell and the skin by screw fastening.

[0024] The above needle stopper may include a stopper gripping portion that protrudes from the circumference of the needle stopper and grips the needle stopper to screw-fasten the needle stopper to the stopper fastening portion.

[0025] A handpiece including a needle cartridge for skin treatment according to an embodiment of the present invention may include the needle cartridge of the above embodiment and a driving handle mechanism that provides a driving force for reciprocating the treatment needle by detachably connecting the needle cartridge.

[0026] According to the present invention, by forming a charging space for charging the treatment liquid by means of a treatment liquid charging shell, and charging the treatment liquid in a large quantity, not only can the inconvenience of frequent charging of the treatment liquid be eliminated, but also by forming an air inlet for introducing air into the charging space in the treatment liquid charging shell, so that whenever the treatment liquid in the cartridge body is consumed, air is automatically supplied to the cartridge body by introducing air through the air inlet, thereby eliminating the inconvenience of the operation for supplying ink and suppressing excessive discharge of the treatment liquid, thereby enabling accurate treatment.

[0027] In addition, the present invention positions the air inlet at the bottom of the charging space so that in a normal state, the treatment liquid blocks the air inlet to prevent leakage of the treatment liquid, and only when a pressure difference occurs due to consumption of the treatment liquid does air flow into the air inlet, so that the structure for automatically supplying the treatment liquid is simple, making it easy to manufacture and reducing the manufacturing cost.

[0028] In addition, the present invention forms a pressure reducing hole in the cartridge body to minimize pressure changes that occur according to the movement of the reciprocating treatment needle in the cartridge body, thereby preventing the occurrence of treatment defects due to excessive or insufficient discharge of the treatment liquid.

[0029] In addition, the present invention can easily control the amount of the treatment liquid to be penetrated by controlling the depth at which the treatment needle penetrates the skin through the treatment liquid-filled outer skin by means of a needle stopper.

[0030] In addition, the present invention not only enables easy setting of the penetration depth of the needle by screwing the needle stopper to the outer skin filled with the treatment liquid by a stopper fastening portion, but also enables easy rotation of the needle stopper by forming a stopper holding portion on the needle stopper.

[0031] FIG. 1 is a perspective view illustrating a needle cartridge for skin treatment according to an embodiment of the present invention.

[0032] Figure 2 is an exploded perspective view of a needle cartridge for skin treatment according to an embodiment of the present invention.

[0033] FIG. 3 is a side cross-sectional view illustrating a needle cartridge for skin treatment according to an embodiment of the present invention.

[0034] FIG. 4 is a side cross-sectional view illustrating a needle cartridge for skin treatment according to an embodiment of the present invention, showing a state in which the needle has penetrated the skin.

[0035] FIG. 5 is a cross-sectional side view illustrating another example of an air inlet constituting a needle cartridge for skin treatment according to an embodiment of the present invention.

[0036] FIG. 6 is a perspective view illustrating a handpiece including a needle cartridge for skin treatment according to an embodiment of the present invention.

[0037] FIG. 7 is a schematic cross-sectional side view illustrating a handpiece including a needle cartridge for skin treatment according to an embodiment of the present invention.

[0038] * Explanation of major symbols in the drawing *

[0039] 100: Needle cartridge for skin treatment 110: Treatment needle

[0040] 115: Pressure plate 116: Movement restriction bar

[0041] 120: Cartridge body 121: Guide part

[0042] 121a: Needle hole 121b: Liquid supply hole

[0043] 123: Outer shell joint 125: Handle joint

[0044] 127: Pressure relief hole 130: Liquid-filled outer shell

[0045] 131: Charging space 133: Treatment solution injection port

[0046] 133a: Inlet plug 133b: Plug holder

[0047] 135: Outer shell 137,137': Air inlet

[0048] 139: Stopper fastening part 140: Needle stopper

[0049] 141: Skin contact part 141a: Stopper hole (141a)

[0050] 143: Outer shell fastening part 145: Stopper rib

[0051] 147: Stopper grip part 150: Elastic member

[0052] 151: Absent cap 200: Drive handle mechanism

[0053] 210: Cartridge joint 230: Drive unit

[0054] 231: Plunger 300: Handpiece

[0055] Hereinafter, an embodiment of the present invention will be described with reference to the attached drawings.

[0056] As shown in FIGS. 3 and 4, the skin treatment needle cartridge (100) according to an embodiment of the present invention may include a treatment needle (110).

[0057] This treatment needle (110) can penetrate the treatment solution into the skin.

[0058] Here, the treatment liquid may be ink for tattooing, medicine for skin regeneration, or cosmetics for skin care, depending on the purpose of the skin treatment.

[0059] At the end of the treatment needle (110), a pressure member (115) that applies pressure to the reciprocating motion of the treatment needle (110) by means of a driving handle mechanism (200) to be described below may be installed in a form extending in the longitudinal direction of the treatment needle (110).

[0060] The treatment needles (110) may be configured in the form of a bundle of multiple needles.

[0061] As illustrated in FIGS. 1 to 4, a needle cartridge (100) for skin treatment according to an embodiment of the present invention may include a cartridge body (120).

[0062] The cartridge body (120) can guide the reciprocating motion of the treatment needle (110) so that the treatment needle (110) penetrates and reciprocates within the cartridge body (120) and emerges from the end of the cartridge body (120).

[0063] The cartridge body (120) is formed in a shape that is penetrated from top to bottom, and a needle hole (121a) through which a treatment needle (110) emerges can be formed at one end of the penetrated end of the cartridge body (120), and the other end of the cartridge body (120) can be positioned so that a pressure member (115) connected to the treatment needle (110) is exposed to the outside.

[0064] The part (one end of the cartridge body (120)) where the needle hole (121) is located with the center of the cartridge body (120) as the center can be a guide part (121) that guides the treatment needle (110) when it reciprocates, and the guide part (121) can be formed in a pointed shape with an area that gradually narrows as it goes from the cartridge body (120) toward the needle hole (121a).

[0065] A handle coupling portion (125) that is detachably coupled to a driving handle mechanism (200) can be formed in the opposite direction (the other end of the cartridge body (120)) to the direction in which the guide portion (121) is positioned with the center of the cartridge body (120) as the center.

[0066] The handle coupling part (125) can be connected to the driving handle mechanism (200) by being screwed or forcedly fitted to the driving handle mechanism (200).

[0067] A plurality of fitting projections may be formed around the circumference of the handle coupling portion (125) so that it can be forcibly fitted into the driving handle mechanism (200).

[0068] A pressure reducing hole (127) may be formed in the cartridge body (120) to communicate with the outside and allow outside air to circulate into the inside of the cartridge body (120) in order to reduce the internal pressure of the cartridge body (120) that changes according to the reciprocating motion of the surgical needle (110).

[0069] The pressure reducing hole (127) can prevent the reciprocating movement of the treatment needle (110) from being delayed due to internal pressure by reducing the internal pressure acting in accordance with the reciprocating movement of the treatment needle (110).

[0070] In the cartridge body (120), a treatment fluid supply hole (121b) that is connected to the filling space (131) to be described below may be formed around the adjacent periphery of the needle hole (121a) through which the treatment needle (110) emerges so that some of the treatment fluid filled in the filling space (131) flows in and is discharged.

[0071] Here, when the treatment needle (110) reciprocates, most of the air flows in and out through the pressure reducing hole (127), reducing the internal pressure, but some of the internal pressure acts on the treatment liquid supply hole (121b).

[0072] And, the pressure may act as a pressure that causes the treatment liquid in the charging space (131) to flow into the lower part of the cartridge body (120) through the treatment liquid supply hole (121b), or the pressure may act as a pressure that causes the treatment liquid supplied to the cartridge body (120) to be discharged to the outside through the needle hole (121a) through the movement of the treatment needle (110).

[0073] The treatment solution supply hole (121b) is formed with a small diameter so that the treatment solution can be supplied from the filling space (131) to the needle hole (121a) by capillary phenomenon.

[0074] The treatment solution supply hole (121b) can be formed through the end of the guide part (121) where the needle hole (121a) is located in the cartridge body (120).

[0075] Here, since the treatment solution supply hole (121b) is formed at the location where the needle hole (121a) is located, when the needle hole (121a) is filled with the treatment solution, the treatment solution supply hole (121b) is sealed by the treatment solution and external pressure is not applied.

[0076] And when the treatment liquid supplied through the needle hole (121a) is completely exhausted, pressure is applied to the treatment liquid supply hole (121b) so that the treatment liquid can be supplied to the needle hole (121a) through the treatment liquid supply hole (121b).

[0077] An outer shell joint (123) may be formed between the guide portion (121) and the handle joint portion (125) of the cartridge body (120) to which the end of the treatment liquid-filled outer shell (130) described below is fitted and joined. The outer shell joint portion (123) may be configured in a form in which an outer circumference corresponding to the inner circumference of the treatment liquid-filled outer shell (130) is fitted, and a step is formed so that the end of the treatment liquid-filled outer shell (130) is hung over.

[0078] As shown in FIGS. 2 to 4, the skin treatment needle cartridge (100) according to an embodiment of the present invention may include an elastic member (150).

[0079] This elastic member (150) can provide a return force to the reciprocating motion of the treatment needle (110) in the cartridge body (120).

[0080] The elastic member (150) can support the treatment needle (110) in the cartridge body (120) by the elastic force in such a way that when the treatment needle (110) is pressurized in the cartridge body (120) and protrudes through the needle hole (121), elastic force is accumulated, and when the pressurized force is released, the treatment needle (110) protruding into the needle hole (121) is inserted by the accumulated elastic force.

[0081] An example elastic member (150) may be formed in the shape of a boot with an elastic material (e.g., silicone, rubber, etc.), as in the embodiment, and one end of the boot may be connected to the upper end of the cartridge body (120), and the other end of the boot may be connected to the circumference of a needle (110) or a pressure plate (115) that penetrates the center of the boot.

[0082] At this time, the elastic member (150) is fitted to the upper part of the handle coupling part (125) of the cartridge body (120) to seal the inside of the cartridge body (120), and can be coupled to the cartridge body (120) in a state where the pressure member (115) is coupled to the member cap (151) that penetrates and is exposed to the outside, and a movement limiting step (116) that extends over the member cap (151) can be formed to protrude in order to limit the excessive movement of the treatment needle (110) in the direction of return due to the elastic force of the elastic member (150) on the pressure member (115).

[0083] Here, as the treatment needle (110) reciprocates in the cartridge body (120), an example of an elastic member (150) causes a change in pressure as air flows inside the cartridge body (120). Since most of the air flows in and out through the pressure reducing hole (127), the pressure change acting on the cartridge body (120) can be resolved as the elastic member (150) flows as the treatment needle (110) reciprocates.

[0084] Another example of an elastic member (not shown) may be implemented as a compression coil spring or a tensile coil spring, and the treatment needle (110) may be supported by the elastic force of the spring in the cartridge body (120), so that when the treatment needle (110) is pressed to protrude, the compression coil spring is compressed or the tensile coil spring is tensioned, accumulating elastic force, and when the pressure of the pressure plate (115) is released, the treatment needle (110) may be inserted by the accumulated elastic force.

[0085] However, an example of a boot-shaped elastic member (150) can provide a smoother reciprocating motion of the surgical needle (110) than an example of a spring-shaped elastic member (150) due to the characteristics of the material.

[0086] As illustrated in FIGS. 1 to 4, a needle cartridge (100) for skin treatment according to an embodiment of the present invention may include a treatment solution-filled outer shell (130).

[0087] This treatment liquid filling outer shell (130) can form a filling space (131) in which treatment liquid is filled between the cartridge body (120) and the treatment liquid filling outer shell (130).

[0088] The treatment liquid filling outer shell (130) wraps around the circumference of the guide portion (121) in the cartridge body (120), and the inner circumference of the treatment liquid filling outer shell (130) is formed to have a circumference larger than the circumference of the guide portion (121), so that a treatment liquid filling space (131) can be formed between the treatment liquid filling outer shell (130) and the guide portion (121).

[0089] The upper part of the treatment liquid filling outer shell (130) is open, and an outer shell hole (135) into which a part formed with a needle hole (121a) of a guide part (121) is fitted can be formed through the lower part of the treatment liquid filling outer shell (130).

[0090] The open upper end of the treatment liquid filling outer shell (130) can be fitted and joined to the outer shell joining portion (123) formed in the cartridge body (120).

[0091] Here, if air flows in between the outer skin joint (123) and the treatment liquid filling outer skin (130), the internal pressure (vacuum state) of the filling space (131) is released, so a problem may occur in which the treatment liquid flows into the treatment liquid supply hole (121b) and is discharged through the needle hole (121a).

[0092] To prevent this, it is preferable that the portion of the outer shell (130) filled with the treatment solution that is joined to the outer shell joint (123) be joined to be completely airtight by means of an adhesive, heat fusion, ultrasonic fusion, or the like.

[0093] A treatment solution injection port (133) for injecting the treatment solution can be formed through the circumference of the treatment solution filling outer shell (130) and is connected to the filling space (131).

[0094] An injection port stopper (133a) for opening and closing the injection port (133) may be installed in the injection port (133), and the injection port stopper (133a) may be formed of a material (e.g., silicone, urethane, rubber, etc.) that has excellent airtightness and is elastically deformable so that the injection port stopper (133a) can be easily removed from the injection port (133).

[0095] A plug holding portion (133b) may be formed to protrude from the injection port stopper (133a) to separate the injection port stopper (133a) from the injection port stopper (133) when the injection port stopper (133) is blocked.

[0096] Since the injection port stopper (133a) is formed of an elastic material, it not only has excellent airtightness, but also, when the treatment liquid is not supplied to the cartridge body (120) in the future, the injection port stopper (133a) is pressurized to increase the pressure in the filling space (131), thereby forcibly supplying the treatment liquid to the cartridge body (120), or it can perform the function of opening the treatment liquid supply hole (121b) or air inlet (137) blocked by foreign substances by pressure.

[0097] The injection port plug (133a) can prevent the treatment liquid in the charging space (131) from naturally flowing out to the outside by maintaining a vacuum state in which air does not circulate into the charging space (131).

[0098] An air inlet (137) may be formed in the treatment liquid filling outer shell (130) to introduce outside air into the sealed filling space (131) and supply the treatment liquid in the filling space (131) to the needle hole (121a) through the treatment liquid supply hole (121b) of the cartridge body (129).

[0099] An example air inlet (137) can be formed by penetrating a hole in the lower circumference where the outer shell hole (135) of the treatment liquid filling outer shell (130) is formed, so that air can be introduced as the treatment liquid in the filling space (131) is consumed.

[0100] Here, the air inlet (137) is formed at the bottom of the charging space (131), so that when the treatment needle (110) is in contact with the skin for skin treatment, the air inlet (137) is sealed by the treatment liquid, blocking the introduction of outside air. When a pressure difference occurs in the cartridge body (120) due to consumption of the treatment liquid, outside air can be introduced into the charging space (131) through the air inlet (137).

[0101] In addition, the air inlet (137) can be formed to a size that prevents the treatment liquid from leaking out due to its viscosity at atmospheric pressure.

[0102] As illustrated in FIG. 5, another example of an air inlet (137') may be formed between the end of the guide portion (121) inserted into the outer skin hole (135) and the outer skin hole (135), so that air is introduced between the circumference of the guide portion (121) and the outer skin hole (135) as the treatment liquid in the charging space (131) is consumed.

[0103] Of course, the air inlet (137) can also perform the function of easily filling the treatment liquid into the filling space (131) by positioning the treatment needle (110) upward when filling the treatment liquid into the filling space (131) so that the air inlet (137) is positioned upward, thereby discharging the air filled in the filling space (131) to the outside through the air inlet (137).

[0104] The treatment liquid filling outer shell (130) may be formed as a transparent body so that the amount of treatment liquid filled in the filling space (131) can be easily checked from the outside.

[0105] A needle stopper (140) to be described below may be screwed onto the treatment liquid filling outer shell (130) to adjust the height of the needle stopper (140) relative to the treatment liquid filling outer shell (130) and thereby a stopper fastening part (139) may be formed to adjust the depth of the treatment needle (110) penetrating into the skin.

[0106] The stopper fastening portion (139) can be formed on the lower periphery of the treatment liquid filling outer shell (130), and the stopper fastening portion (139) can be configured in a form in which threads are formed on the outer surface to adjust the height of the treatment liquid filling outer shell (130) by screwing the needle stopper (140).

[0107] As shown in FIGS. 1 to 4, the skin treatment needle cartridge (100) according to an embodiment of the present invention may include a needle stopper (140).

[0108] The needle stopper (140) can control the depth at which the treatment needle (110) that emerges from the needle hole (121a) penetrates the skin.

[0109] The needle stopper (140) can adjust the depth at which the treatment needle (110) penetrates the skin by adjusting the gap between the needle hole (121a) and the skin, thereby controlling the amount of treatment liquid that penetrates the skin.

[0110] For example, if the treatment liquid is ink for a tattoo, the amount of ink penetration is increased or decreased in proportion to the depth at which the treatment needle (110) penetrates, so the brightness or color of the tattoo or the spread of the tattoo can be adjusted according to the depth (epidermis, dermis, and subcutaneous tissue) at which the treatment needle (110) penetrates the skin through the needle stopper (140).

[0111] And, since the amount of ink increases as it approaches the needle hole (121a), the narrower the gap between the stopper hole (141a) and the needle hole (121a), the more ink is supplied, and the wider the gap between the stopper hole (141a) and the needle hole (121a), the less ink is supplied.

[0112] The needle stopper (140) may include a skin contact portion (141) that comes into contact with the skin, an outer skin fastening portion (143) that is connected to the treatment liquid-filled outer skin (130), and a stopper rib (145) that connects the skin contact portion (141) and the outer skin fastening portion (143).

[0113] The skin contact portion (141) may be formed in the form of a ring or ring plate with a stopper hole (141a) formed through the center so that the treatment needle (110) can penetrate the skin while moving back and forth.

[0114] At this time, the stopper hole (141a) is formed in the shape of an ellipse or a long hole with a long length in the direction in which the needle stopper (140) moves to apply the treatment solution, thereby guiding the direction for treatment and making it easy to identify the previously indicated location of the treatment.

[0115] The outer skin fastening part (143) can be fixed by fastening the needle stopper (140) to the liquid-filled outer skin (130).

[0116] The outer skin fastening part (143) is in the shape of a ring, and a screw thread may be formed on the inner periphery of the outer skin fastening part (143) to be screw-fastened to the screw thread formed on the stopper fastening part (139) of the liquid-filled outer skin (130).

[0117] Since the outer skin fastening part (143) is screw-fastened to the stopper fastening part (139) of the treatment liquid-filled outer skin (130), the depth at which the treatment needle (110) penetrates into the skin can be controlled by adjusting the gap between the tip of the treatment liquid-filled outer skin (130) and the skin contact part (141) by screw-fastening the needle stopper (140) according to the rotational direction of the treatment liquid-filled outer skin (130).

[0118] The skin contact portion (141) and the outer skin fastening portion (143) can be connected to each other by a stopper rib (145), and the stopper rib (145) is installed so that a plurality of skin contact portions (141) and outer skin fastening portions (143) are spaced apart from each other along the circumferential direction, so that the treatment can be performed while visually observing the treatment needle (110) moving back and forth between the stopper ribs (145).

[0119] The perimeter of the skin contact portion (141) is formed as an upward curved surface, thereby eliminating the foreign body sensation caused by the edge when in contact with the skin.

[0120] A stopper gripping portion (147) may be formed to protrude around the outer skin fastening portion (143) to facilitate rotation of the stopper fastening portion (139) in the liquid-filled outer skin (130).

[0121] Let us explain the actions and effects between each component described above.

[0122] According to an embodiment of the present invention, a skin treatment needle cartridge (100) may have a guide portion (121) formed in the cartridge body (120) to guide the reciprocating movement of the treatment needle (110), and a handle coupling portion (125) formed on the other side of the cartridge body (120) to fit and couple the needle cartridge (100) to a driving handle mechanism (200).

[0123] A treatment needle (110) is installed inside the cartridge body (120), and the treatment needle (110) reciprocates along the length direction of the treatment needle (110) through a needle hole (121a) formed at the end of the guide portion (121) of the cartridge body (120) and is inserted, and a pressure plate (115) is installed at the end opposite to the treatment needle (110) so as to be exposed to the outside of the cartridge body (120).

[0124] A treatment solution supply hole (121b) is formed through which the treatment solution filled in the filling space (131) flows into the needle hole (121a) formed at the end of the guide part (121).

[0125] The surgical needle (110) is supported by the elastic force of the elastic member (150) in the cartridge body (120), and the elastic member (150) is formed in the shape of a boot, so that one end of the elastic member (150) is fixed to the pressure plate (115), and the other end of the elastic member (150) is connected to the outer end of the handle connection portion (125) of the cartridge body (120) by the member cap (151).

[0126] At this time, the absence cap (151) is installed in a form in which the pressure member (115) exposed to the outside of the handle joint (125) penetrates and is exposed, and the elastic member (150) is tensioned when the treatment needle (110) is pressed downward and protrudes into the needle hole (121a), and when the pressure is removed, the tensioned elastic member (150) contracts and the treatment needle (110) that was protruding into the needle hole (121a) is inserted.

[0127] And, in order to minimize the change in internal pressure of the cartridge body (120) due to the elastic member (150) that is stretched and contracted as the surgical needle (110) reciprocates, a pressure reducing hole (127) is formed through which air is circulated from the outside to reduce the internal pressure.

[0128] The guide part (121) of the cartridge body (120) is wrapped by the treatment liquid filling outer shell (130), and a filling space (131) in which the treatment liquid is filled is formed between the guide part (121) and the treatment liquid filling outer shell (130).

[0129] An outer shell hole (135) may be formed through the end of the treatment liquid filling outer shell (130) so that the needle hole (121a) of the guide part (121) is exposed to the outside, and a treatment liquid injection port (133) for injecting the treatment liquid into the treatment liquid filling space (131) is formed through the treatment liquid filling outer shell (130).

[0130] An injection port stopper (133a) for opening and closing the injection port (133) is installed in the injection port of the treatment solution (133), and a stopper holding portion (133b) is formed protruding from the injection port stopper (133a) to easily hold and remove the injection port stopper (133a) from the injection port of the treatment solution (133).

[0131] As the treatment liquid is filled or consumed in the treatment liquid filling outer shell (130), an air inlet (137) is formed to easily supply air to the treatment liquid supply hole (121b) by flowing in and out, and the air inlet (137) is formed penetrating the lower part of the filling space (131) while the treatment needle (110) is facing the floor.

[0132] A needle stopper (140) is installed in the treatment liquid-filled outer shell (130) to set the penetration depth of the treatment needle (110), and the needle stopper (140) has a stopper hole (141a) formed through which the needle emerges in the skin contact portion (141), and the skin contact portion (141) is connected to the outer shell fastening portion (143) by a stopper rib (145), so that the outer shell fastening portion (143) is screw-fastened to the stopper fastening portion (139) of the treatment liquid-filled outer shell (130).

[0133] According to an embodiment of the present invention, a needle cartridge (100) for skin treatment configured as described above opens the injection port stopper (133a) of the injection port (133) of the injection port, fills the injection port (131) with the injection port stopper (133a), and seals the injection port (133) with the injection port stopper (133a).

[0134] At this time, the treatment needle (110) can be positioned so that it faces upwards, and the treatment liquid can be filled with the air inlet (137) located at the top. When the treatment liquid is filled in the filling space (131), the air filled in the filling space (131) is discharged through the air inlet (137), and the treatment liquid can be filled in the filling space (13).

[0135] When the treatment liquid is filled in the charging space (131) and the treatment needle (110) is positioned so that it faces the floor, the treatment liquid filled in the charging space (131) closes the air inlet (137) and flows into the needle hole (121a) through the treatment liquid supply hole (121b) until the pressure of the charging space (131) and the internal pressure of the guide part (121) of the cartridge body (120) become equal.

[0136] Meanwhile, when the treatment liquid is filled in the charging space (131), the needle stopper (140) is rotated in the treatment liquid filling outer shell (130) through the stopper holding portion (147) to set the depth at which the treatment needle (110) penetrates the skin.

[0137] When the needle stopper (140) rotates, the stopper fastening portion (139) of the treatment liquid filling outer shell (130) and the outer shell fastening portion (143) of the needle stopper (140) are screw-fastened according to the rotational direction of the needle stopper (140), and the needle stopper (140) moves up and down in the treatment liquid filling outer shell (130), thereby adjusting the gap between the skin contact portion (141) and the needle hole (121a) to set the penetration depth of the treatment needle (110).

[0138] Here, as in the past, when the depth at which the treatment needle (110) penetrates the skin is controlled through the position at which the pressure band (115) is pressed by the driving handle mechanism (200), the pressure applied to the pressure band (115) by the motor or solenoid changes depending on the position of the pressure band (115), and the force transmitted to the treatment needle (110) changes, resulting in a treatment defect.

[0139] However, as in the present invention, when the penetration depth of the treatment needle (110) is adjusted through the needle stopper (140) in the treatment liquid filling outer shell (130), even if the penetration depth of the treatment needle (110) changes, the pressure applied to the pressure plate (115) is the same, so that treatment defects due to uneven pressure can be prevented.

[0140] The length of the treatment needle (110) can be adjusted by the needle stopper (140), but if the needle stopper (140) is not installed, the protruding length of the treatment needle (110) can also be adjusted by adjusting the height of the needle cartridge (100) configured within the driving handle mechanism (200).

[0141] When the penetration depth of the treatment needle (110) is set by the needle stopper (140), the pressure plate (115) is repeatedly pressed and reciprocated through the driving handle mechanism (200) to move the treatment area and perform the treatment.

[0142] When the treatment needle (110) reciprocates, the treatment liquid introduced into the needle hole (121a) is deposited on the outer surface of the treatment needle (110), and the treatment needle (110) allows the treatment liquid to penetrate the skin.

[0143] Here, when the treatment needle (110) is pressurized by the driving handle mechanism (200), the treatment needle (110) protrudes through the needle hole (121a) and penetrates the skin. When the treatment needle (110) protrudes, the elastic member (150) is tensioned, and the elastic force of the elastic member (150) is accumulated. When the pressure of the treatment needle (110) is released, the accumulated elastic member (150) contracts, and the treatment needle (110) is inserted into the needle hole (121a), so that the treatment needle (110) can be inserted.

[0144] When the treatment needle (110) is inserted, the internal pressure acting on the cartridge body (120) by the elastic member (150) that is stretched or contracted is reduced as air flows in and out through the pressure reducing hole (127), and some of the pressure acts on the needle hole (121a), which can help the treatment liquid flow into the needle hole (121a) through the treatment liquid supply hole (121b) and discharge it from the needle hole (121a) to the skin.

[0145] For example, when the elastic member (150) contracts and the needle is inserted into the needle hole (121a), negative pressure is generated in the guide part (121) by the contracting elastic member (150), and the treatment liquid flows into the needle hole (121a) through the treatment liquid supply hole (121b). When the elastic member (150) is tensioned and the needle protrudes into the needle hole (121a), positive pressure is generated in the guide part (121) by the tensioned elastic member (150), and the treatment liquid that flows into the needle hole (121a) can be discharged toward the skin.

[0146] And, when the treatment needle (110) reciprocates and the treatment liquid supplied to the needle hole (121a) is exhausted and the treatment liquid supply hole (121b) is exposed to the outside, the pressure difference that has been maintained between the cartridge body (120) and the charging space (131) occurs, and the treatment liquid in the charging space (131) moves to the needle hole (121a) through the treatment liquid supply hole (121b).

[0147] At this time, the movement of the treatment liquid through the treatment liquid supply hole (121b) is caused by a complex combination of pressures, including the pressure difference maintained between the cartridge body (120) and the charging space (131), the internal pressure changed by the reciprocating movement of the elastic member (150), the area where the external pressure of the charging space (131) and the cartridge body (120) acts, and the capillary phenomenon due to the surface tension of the treatment liquid, acting on the needle hole (121a), so that the treatment liquid in the charging space (131) is supplied to the needle hole (121a).

[0148] And the charging space (131) maintains a vacuum state where there is no movement of fluid, and when a pressure difference occurs due to consumption of the treatment liquid, outside air is introduced into the charging space (131) through the air inlet (137), and the treatment liquid moves to the needle hole (121a).

[0149] When outside air is introduced into the charging space (131) and the internal pressure of the cartridge body (120) and the internal pressure of the charging space (131) become equal, the supply of the treatment liquid to the needle hole (121a) is blocked.

[0150] As the treatment liquid is consumed in the needle hole (121a), the treatment liquid is automatically supplied to the needle hole (121a) until all the treatment liquid filled in the charging space (131) is consumed, without any separate operation, in a form in which the supply and blocking of the treatment liquid from the charging space (131) to the needle hole (121a) is repeated due to the pressure difference.

[0151]

[0152] Hereinafter, a handpiece (300) including a needle cartridge (100) for skin treatment according to an embodiment of the present invention will be described.

[0153] As shown in FIGS. 6 and 7, a handpiece (300) including a needle cartridge (100) for skin treatment according to an embodiment of the present invention includes the needle cartridge (100) for skin treatment according to the embodiment described above, and may include a driving handle mechanism (200).

[0154] The driving handle mechanism (200) can provide driving force to reciprocate the needle of the needle cartridge (100).

[0155] A cartridge coupling portion (210) into which a needle cartridge (100) is coupled may be formed at one end of the driving handle mechanism (200), and the cartridge coupling portion (210) may be formed in the form of a groove into which the handle coupling portion (125) of the needle cartridge (100) is inserted and coupled in the form of a forced fit.

[0156] The driving handle mechanism (200) may be configured with a driving unit (230) for pressing or releasing the end of the pressure plate (115) exposed to the outside of the needle cartridge (100) coupled to the cartridge coupling unit (210). The driving unit (230) may be in the form of a solenoid in which a plunger (231) is retracted by magnetic force, or in the form of a cam rotated by a driving motor.

[0157] Here, if the driving unit (230) is configured in a form in which the cam rotates by the driving motor, the treatment needle (110) appears in the form of an analog sine wave, but if the driving unit (230) is configured in the form of a solenoid, the treatment needle (110) appears in an on or off form as if it were a digital signal, so that the treatment can be performed in a more precise point form than the driving unit (230) configured with the driving motor and the cam, and damage to the skin can be minimized.

[0158] The driving handle mechanism (200) further includes a handpiece controller (not shown) and controls the driving gear through the handpiece controller to control the on / off operation of the driving unit (230), the reciprocating speed of the treatment needle (110), and the pattern of the appearance of the treatment needle (110) (e.g., multiple firings).

[0159]

[0160] Therefore, the needle cartridge (100) for skin treatment according to an embodiment of the present invention and the handpiece (300) including the same form a filling space (131) for filling the treatment liquid by the treatment liquid filling outer shell (130), thereby eliminating the inconvenience of frequent filling of the treatment liquid when performing skin treatment.

[0161] In addition, since an air inlet (137) is formed in the treatment liquid filling outer shell (130) so that whenever the treatment liquid is consumed in the needle hole (121a), outside air is introduced through the air inlet (137) and automatically supplied to the needle hole (121a) until all the treatment liquid filled in the filling space (131) is consumed, not only can the hassle of operation due to the supply of the treatment liquid be eliminated, but also the configuration for automatic supply is relatively simple, so that manufacturing is easy and manufacturing costs can be reduced.

[0162] In addition, an air inlet (137) is formed at the bottom of the charging space (131), and the air inlet (137) is normally closed by the treatment liquid filled in the charging space (131), thereby maintaining the pressure of the charging space (131), thereby preventing the treatment liquid from leaking out to the outside.

[0163] In addition, by combining the needle stopper (140) in the form of screw-fastening to the stopper fastening part (139) in the treatment liquid filling outer shell (130) to control the penetration depth of the treatment needle (110), the pressure applied to the pressure plate (115) through the driving part (230) is maintained the same, while only the penetration depth of the treatment needle (110) can be adjusted. Therefore, not only can the occurrence of a treatment defect due to uneven pressure applied to the treatment needle (110) be prevented, but the penetration depth of the treatment needle (110) can be easily controlled.

[0164] In addition, as the elastic member (150) is deformed according to the reciprocating motion of the treatment needle (110), the internal pressure acting on the cartridge body (120) is reduced by causing air to flow in and out through the pressure reducing hole (127), thereby preventing the phenomenon of excessive discharge or non-discharge of the treatment liquid due to excessive pressure change of the cartridge body (120).

[0165] Although the embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and includes all changes and modifications that can be easily modified and deemed equivalent by a person having ordinary skill in the art to which the present invention pertains from the embodiments of the present invention.

Claims

1. A treatment needle that penetrates the treatment solution into the skin. A cartridge body that supports the above-mentioned needles to reciprocate, An elastic member that supports the treatment needles in the cartridge body by elastic force to reciprocate the treatment needles in the cartridge body, and In order to supply the treatment liquid to the cartridge body, it includes a treatment liquid filling outer shell that forms a filling space in which the treatment liquid is filled around the cartridge body, The above-mentioned treatment liquid filling outer skin A treatment solution injection port for injecting treatment solution into the above charging space, An injection port stopper for opening and closing the above-mentioned injection port, and A needle cartridge for skin treatment, characterized in that it includes an air inlet for air to be introduced into the charging space so that when the treatment liquid in the cartridge body is consumed and a pressure difference occurs with the charging space, the treatment liquid is automatically supplied to the cartridge body by air being introduced into the charging space.

2. In paragraph 1, The above air inlet A needle cartridge for skin treatment, characterized in that it is formed at the bottom of the charging space so that when the treatment liquid is not supplied to the cartridge body, it is sealed by the treatment liquid, and air is introduced into the charging space only when a pressure difference occurs between the cartridge body and the charging space.

3. In paragraph 1, The above cartridge body The needle hole that appears and disappears as the above-mentioned needle moves back and forth, and A needle cartridge for skin treatment, characterized in that it includes a treatment solution supply hole formed through a penetration in a position close to the needle hole and supplying the treatment solution of the filling space to the needle hole.

4. In paragraph 1, The above cartridge body A needle cartridge for skin treatment, characterized in that it includes a pressure reducing hole through which air is circulated to the cartridge body to reduce changes in internal pressure according to the reciprocating movement of the needle in the cartridge body.

5. In paragraph 1, A needle cartridge for skin treatment, characterized in that it includes a needle stopper that controls the penetration depth of the treatment needles by controlling the gap between the end of the treatment needles that emerge from the treatment liquid-filled outer skin and the skin.

6. In paragraph 4, The above-mentioned treatment liquid filling outer skin A skin treatment needle cartridge characterized by including a stopper fastening part for screw-fastening the needle stopper to the treatment liquid-filled outer skin so as to adjust the gap between the end of the treatment liquid-filled outer skin and the skin by screw fastening.

7. In paragraph 5, The above needle stopper A needle cartridge for skin treatment, characterized in that it includes a stopper gripping portion that protrudes from the circumference of the needle stopper and grips the needle stopper to screw-fasten the needle stopper to the stopper fastening portion.

8. The skin treatment needle cartridge described in Article 1, and A handpiece including a needle cartridge for skin treatment, characterized in that the needle cartridge is detachably coupled and includes a driving handle mechanism that provides a driving force for reciprocating the treatment needle.

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