Beauty therapy devices

Abstract

To provide a device capable of improving efficiency in a combination of a fluid injection therapy.SOLUTION: There is provided a device for cosmetic therapy, and the device comprises: an injection unit; and a fluid supply unit. The injection unit comprises: a handle part including a fluid passage; one or more hollow first needles provided on an end of the handle part, the one or more hollow first needles comprising an internal passage which is communicated in fluid communication with the fluid passage; and one or more second needles including a water soluble or water dispersible material, the one or more second needles capable of being separated from the handle part. The fluid supply unit is configured to be coupled to the handle part and supply the fluid to the fluid passage.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a device for beauty therapy. [Background technology]

[0002] Dark circles on the skin are a major consumer concern and remain an unaddressed problem. Cosmetics are the only at-home solution, but they are not sufficient for many people. On the other hand, more invasive procedures exist but must be performed in a clinic.

[0003] Carboxytherapy is a medical treatment that has been successfully and widely used in various fields of medicine. For example, Patent Document 1 (WO 2014 / 142970) discloses a carboxytherapy device for injecting CO2 gas into the skin. Carboxytherapy consists of injecting CO2 into the dermis and has shown excellent results in preventing facial aging, particularly in reducing dark circles. In fact, dark circles are caused by a variety of factors, including deep facial anatomy (e.g., intradermal capillary network), contributions from the skin (e.g., excessive pigmentation), and soft tissue aging (e.g., thin skin or shadows due to skin laxity). These diverse factors make the problem of dark circles extremely complex. CO2 injection provides multiple benefits, such as oxygen supply, improved microcirculation, anti-inflammation, and collagen stimulation, which can address the above-mentioned multifactorial problem. Clinically observed cosmetic effects include the improvement of circular pigmentation under the eyes, i.e., brightening the area around the eyes.

[0004] Mesotherapy, which consists of injecting active ingredients into the skin, is often combined with carboxytherapy to create a complementary effect and improve treatment results. One of the main active ingredients in mesotherapy is hyaluronic acid (HA), which is well known for its effects in eye contour treatments (increasing hydration, preventing dryness around the delicate eye area, and acting as a filler to improve fine lines).

[0005] In existing treatments, carboxytherapy and mesotherapy are administered sequentially. First, CO2 gas is delivered through a conventional 30G or 32G needle, and then the active ingredient is injected through another needle, or vice versa. Another common method is to apply a cream, lotion, or serum containing an active ingredient, such as HA, topically as a post-treatment after carboxytherapy.

[0006] However, such a sequential approach is time consuming and burdensome to the user. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] International Publication No. 2014 / 142970 Summary of the Invention [Problem to be solved by the invention]

[0008] It is an object of the present invention to provide a device that can improve the efficiency of combined fluid injection therapies such as carboxytherapy and mesotherapy. [Means for solving the problem]

[0009] To achieve the above object, one aspect of the present invention provides a device for beauty therapy. The device includes an injection unit and a fluid supply unit. The injection unit includes a handle portion including a fluid passageway, one or more hollow first needles at the end of the handle portion, the one or more hollow first needles having internal passageways in fluid communication with the fluid passageway, and one or more second needles including a water-soluble or water-dispersible material, the one or more second needles being detachable from the handle portion. The fluid supply unit is configured to supply fluid to the fluid passageway.

[0010] According to one aspect of the device, the injection unit may have an application surface on which one or more hollow first needles and one or more second needles protrude towards the same side for application together to the user's skin.

[0011] According to one aspect of the device, the injection unit may include a patch portion removably attached to the handle portion, the patch portion supporting one or more secondary needles.

[0012] According to one embodiment of the device, the patch portion may include an adhesive layer configured to support one or more second needles and to adhere to the user's skin.

[0013] According to one aspect of the device, the patch portion can be configured to be detached from the handle portion while leaving one or more hollow first needles in the handle portion.

[0014] According to one embodiment of the device, the patch portion may include one or more holes to allow passage of one or more hollow first needles.

[0015] According to one aspect of the device, the handle portion may include a detachment mechanism configured to operably detach the patch portion from the handle portion.

[0016] According to one aspect of the device, the handle portion may have an interior space and the detachment mechanism may be housed within the interior space.

[0017] According to one embodiment of the device, the water-soluble or water-dispersible material can be at least one selected from the group consisting of hyaluronic acid, monosaccharides, disaccharides, oligosaccharides, polysaccharides, dextrin, dextran, polyethylene glycol, polyvinyl alcohol, poly(methyl vinyl ether / maleic anhydride), polyvinylpyrrolidone, poly(methyl / vinyl ether / maleic acid), hydrolyzed collagen, and esters thereof, and poly((methyl / vinyl ether / maleic anhydride).

[0018] According to one aspect of the device, one or more hollow first needles may be removably attached to the handle portion.

[0019] According to one embodiment of the device, the length of the one or more hollow first needles and the one or more second needles may be between 20 μm and 1,000 μm.

[0020] According to one aspect of the device, the fluid supply unit may include a fluid reservoir and a pressure regulator that operatively allows fluid to be supplied to the fluid passageway.

[0021] According to one aspect of the device, the fluid may be carbon dioxide gas.

[0022] Non-limiting exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings so that the present invention may be better understood. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a plan view of a device 1 for beauty therapy according to an embodiment; FIG. [Figure 2] 1 is a front view of a device 1 for beauty therapy according to an embodiment; FIG. [Figure 3] 3 is a cross-sectional view of a device 1 for beauty therapy according to an embodiment, taken along line III-III in FIG. 2. FIG. [Figure 4] 1 is a front view of a device for beauty therapy 1 according to an embodiment without a patch portion 14. FIG. [Figure 5A] 5 is a cross-sectional view of a device 1 for beauty therapy according to an embodiment taken along line VV in FIG. 4. FIG. [Figure 5B] 5 is a cross-sectional view of a device 1 for beauty therapy according to an embodiment taken along line VV in FIG. 4. FIG. [Figure 6A] FIG. 1 is a schematic diagram of a method of using the device 1 for beauty therapy. [Figure 6B] FIG. 1 is a schematic diagram of a method of using the device 1 for beauty therapy. [Figure 6C] FIG. 1 is a schematic diagram of a method of using the device 1 for beauty therapy. [Figure 6D] FIG. 1 is a schematic diagram of a method of using the device 1 for beauty therapy. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, embodiments of the present invention will be described in detail. An XYZ coordinate system is defined as shown in the figures, but this is not intended to limit the present invention.

[0025] A device for beauty therapy is described below by way of example, however, the fluid injected is not limited to CO2, but may be any fluid including a gas such as N2O, NO, O2 or H2, a mixture of gases, a liquid, a mixture of liquids, a medical solution, or other fluids, or a combination thereof.

[0026] (Device for beauty therapy) A device 1 for beauty therapy according to an embodiment will be described with reference to Figures 1 to 6D. Figure 1 is a plan view of a device 1 for beauty therapy according to an embodiment.

[0027] 1, the device 1 includes an injection unit 10 and a gas supply unit 50. The injection unit 10 and the gas supply unit 50 may be integrally or inseparably formed, or may be detachably attached to each other. The gas supply unit 50 will be described below as being detachable from the injection unit 10, but this is not necessarily required.

[0028] (Injection Unit 10) Figure 2 is a front view of a device for beauty therapy 1 according to an embodiment. Figure 3 is a cross-sectional view of a device for beauty therapy 1 according to an embodiment taken along line III-III in Figure 2. Figure 4 is a front view of a device for beauty therapy 1 according to an embodiment without a patch portion 14. Figures 5A and 5B are cross-sectional views of a device for beauty therapy 1 according to an embodiment taken along line VV in Figure 4.

[0029] The injection unit 10 supplies CO2 gas through the injection unit 10 into the user's skin S, thereby supplying the active ingredient into the skin S. The injection unit 10 includes a handle portion 12 and a patch portion 14.

[0030] (Handle part 12) The handle portion 12 serves as a grip for the user during use and includes a main body 20, a gas nozzle 22, a hollow first needle 24, a pressing member 26 (an example of a "detachment mechanism"), a slide lever 28, and a connector 30.

[0031] The body 20 is the barrel of the handle portion 12. The shape of the body 20 can be determined depending on the application. For example, the body 20 has a curved shape that is ergonomically easy to grip, as shown in Figure 1. The direction in which the proximal end of the body 20 is oriented intersects the direction in which the distal end of the body 20 is oriented.

[0032] The body 20 has a mounting surface 32 at its distal end. The patch portion 14 is mounted to the mounting surface 32 during use, as shown in Figure 1. The mounting surface 32 has a crescent shape, as shown in Figure 4. The mounting surface 32 has an opening to accommodate the gas nozzle 22 and a pusher 38 of the pusher member 26, which will be described below.

[0033] As shown in FIGS. 3, 5A, and 5B, the main body 20 has an internal space that houses a gas passage 34 (an example of a "fluid passage") and the pressing member 26. The gas passage 34 is connected to the gas supply unit 50 and passes through the main body 20 from its proximal end to its distal end (i.e., the mounting surface 32), supplying CO2 gas from the gas supply unit 50 to the skin S. In FIG. 3, the gas passage 34 is a flexible tubular member within the internal space of the main body 20. The gas passage 34 may be formed at least partially outside the main body 20. It should be noted that the gas passage 34 may be the internal space of the main body 20 itself, without a tubular member.

[0034] The gas nozzle 22 is an injection nozzle for CO2 gas from the gas passage 34. The gas nozzle 22 is provided on the mounting surface 32 and connected to the gas passage 34. The gas nozzle 22 has a cylindrical shape that protrudes upward.

[0035] The first needle 24 is a hollow needle for injecting CO gas from the gas nozzle 22 into the skin S. The first needle 24 is attached to the gas nozzle 22 as shown in FIG. 3. For example, the first needle 24 is detachably attached to the gas nozzle 22 so as to surround the outer surface of the gas nozzle 22. The first needle 24 has an internal passage that is fluidly connected to the gas passage 34 via the gas nozzle 22. The first needle 24 has a tapered cylindrical shape adapted to penetrate the skin S.

[0036] The injection unit 10 may have one or more first needles 24. For example, one first needle 24 in the center of the mounting surface 32 is shown in FIGS. 1 and 2. However, the number of first needles 24 is not limited to that of this embodiment. The first needles 24 may also be installed at the edge of the mounting surface 32. Note that the injection unit 10 does not need to have multiple first needles 24 because CO2 gas diffuses quickly and effectively, so a single first needle 24 is sufficient to supply a sufficient amount of CO2 gas into the skin S during use.

[0037] The material of the first needle 24 may be, for example, a metal such as stainless steel, a silicone compound, a biodegradable polymer, a thermoplastic resin, or a water-soluble polymer. Examples of the biodegradable polymer include polyglycolic acid (PGA) or polylactic acid (PLA). Examples of the thermoplastic resin include medical-grade silicone, a polymer material, an ultraviolet-curable resin, polydimethylsiloxane, polycarbonate, or a cyclic olefin copolymer. Examples of the water-soluble polymer include carboxymethylcellulose (CMC), methylcellulose (MC), hydroxypropylcellulose (HPC), hydroxypropylmethylcellulose (HPMC), polyvinyl alcohol (PVA), a polyacrylic acid-based polymer, polyacrylamide (PAM), polyethylene oxide (PEO), pullulan, alginate, pectin, chitosan, chitosan succinamide, or oligochitosan.

[0038] The length of the first needle 24 can be determined depending on the target depth. For example, the first needle 24 may have a length between 20 μm and 1,000 μm. For cosmetic applications, the first needle 24 may have a length between 50 μm and 300 μm to deliver gas into a thin layer of the skin S, such as the stratum corneum or epidermis. Because the first needle 24 is inserted into a shallow layer, such as the stratum corneum or epidermis, rather than a deeper layer, such as the dermis, an injection unit 10 having a first needle 24 with a length between 50 μm and 300 μm can reduce pain for the user. If the length of the first needle 24 is too long, the first needle 24 may cause pain. On the other hand, if the length of the first needle 24 is too short, it may be difficult to insert the first needle 24 into the skin S. However, the length of the first needle 24 is not limited to that of the present embodiment.

[0039] The outer diameter of the first needle 24 can be determined depending on the application. For example, for cosmetic applications in which gas is delivered without pain or severe discomfort, the outer diameter (e.g., maximum outer diameter) of the first needle 24 is between 40 μm and 200 μm, preferably between 50 μm and 120 μm. For example, the outer diameter of the first needle 24 may be 60 μm or more, 70 μm or more, 80 μm or more, 90 μm or more, or 100 μm or more, and 190 μm or less, 180 μm or less, 170 μm or less, 160 μm or less, or 150 μm or less. If the outer diameter of the first needle 24 is too small, the first needle 24 will easily break during insertion into the skin S. On the other hand, if the outer diameter of the first needle 24 is too large, the first needle 24 will cause pain. In this embodiment, the first needle 24 is a microneedle.

[0040] The pressing member 26 is a separation mechanism for pushing the patch unit 14 away from the attachment surface 32. The slide lever 28 is an operation switch used in combination with the pressing member 26. The pressing member 26 is movably provided within the internal space of the main body 20. The slide lever 28 is connected to one end of the pressing member 26 and is exposed on the outer surface of the main body 20. The slide lever 28 can slide on the outer surface of the main body 20 between a normal position in FIG. 5A and a pressing position in FIG. 5B. The pressing member 26 moves in the Z direction as the slide lever 28 moves. The pressing member 26 includes one transmission member 36 and three pushers 38.

[0041] The transmission member 36 transmits the user's force on the slide lever 28 to the depressors 38. One end of the transmission member 36 is connected to the slide lever 28, while the other end is trifurcated and connected to each of the depressors 38. When the user slides the slide lever 28 from the normal position to the depressing position, the transmission member 36 similarly moves from the normal position to the depressing position. The internal space of the main body 20 is larger than the size of the transmission member 36, allowing the transmission member 36 to move between the normal position and the depressing position.

[0042] The pressers 38 contact the patch portion 14 on the mounting surface 32 and push the patch portion 14 away from the mounting surface 32. The number and shape of the pressers 38 can be determined depending on the application. In this embodiment, three pressers 38 having an elliptical plate shape are provided at the trifurcated end of the transmission member 36 as shown in FIG. 4 to provide the pressing member 26 with multiple pressing points. In the normal position shown in FIG. 5A, the pressers 38 are housed in the openings on the mounting surface 32. In the pressing position shown in FIG. 5B, the pressers 38 protrude from the openings in the mounting surface 32 and press the patch portion 14.

[0043] However, the present invention is not limited to this embodiment, and any other mechanism can be used to separate the patch portion 14 from the handle portion 12.

[0044] The connector 30 connects the main body 20 to the gas supply unit 50, allowing the gas supply unit 50 to supply CO2 gas into the gas passage 34. The connector 30 is a cylindrical portion provided on the proximal end of the main body 20 and in communication with the gas passage 34. Any known connection mechanism is possible for the connector 30. It should be noted that if the gas supply unit 50 is inseparably formed with the injection unit 10, the connector 30 may be omitted.

[0045] (Patch section 14) The patch portion 14 is applied to the user's skin S and injects the active ingredient into the skin S. The patch portion 14 is attached to the attachment surface 32 at the distal end of the handle portion 12. As shown in FIG. 2 , the patch portion 14 has a crescent shape similar to the shape of the attachment surface 32. For example, the patch portion 14 has substantially the same shape as the attachment surface 32 in the XY plane. The crescent shape is suitable for application to the skin under the eyes. The patch portion 14 includes an adhesive layer 40, a separation layer 42, and a second needle 44.

[0046] The adhesive layer 40 is applied and adhered directly to the user's skin S. One side of the adhesive layer 40 facing the user's skin S serves as the application surface of the injection unit 10. The adhesive layer 40 may be made, at least in part, of any type of adhesive. For example, the adhesive layer 40 may be a typical medical adhesive, which may be made from a variety of materials, such as natural rubber or synthetic rubbers, including hydrocolloids, polyacrylates, hydrogels, polyurethanes, or silicones.

[0047] The separation layer 42 facilitates separation of the patch portion 14 from the mounting surface 32. The separation layer 42 is provided between the adhesive layer 40 and the mounting surface 32 and is fixed to the adhesive layer 40. The separation layer 42 may be bonded, e.g., adhered, to the mounting surface 32 less strongly than to the adhesive layer 40. For example, the separation layer 42 may be made of a silicone material or a hydrogel.

[0048] A needle hole 46 for accommodating the first needle 24 is formed in the adhesive layer 40 and the separation layer 42. The needle hole 46 allows the first needle 24 on the attachment surface 32 to pass through the needle hole 46 and protrude from the adhesive layer 40 toward the skin S. Although the needle hole 46 is formed in the center of the adhesive layer 40 and the separation layer 42 in Figure 3, this will depend on the position of the first needle 24.

[0049] The second needle 44 is inserted into the skin S and may at least partially dissolve or disperse within the skin S. The second needle 44 is provided on and protrudes from the mounting surface 32 at the distal end of the handle portion 12. The second needle 44 is located adjacent to the first needle 24 on the adhesive layer 40. The second needle 44 is supported by the patch portion 14, and in particular by the adhesive layer 40.

[0050] The number, density, and arrangement of the second needles 44 can be determined depending on the application. The patch portion 14 can have one or more second needles 44. For example, in Figures 1 and 2, four second needles 44 are shown surrounding one first needle 24. However, the number of second needles 44 is not limited to that of this embodiment. The first needles 24 may be located on the side of the adhesive layer 40, rather than in the center surrounded by the second needles 44.

[0051] The second needle 44 is at least partially, preferably entirely, made of a water-soluble or water-dispersible material, such as a water-soluble or water-dispersible polymer. For example, the water-soluble or water-dispersible material may be at least one selected from the group consisting of hyaluronic acid, monosaccharides, disaccharides, oligosaccharides, polysaccharides, dextrin, dextran, polyethylene glycol, polyvinyl alcohol, poly(methyl vinyl ether / maleic anhydride), polyvinylpyrrolidone, poly(methyl vinyl ether / maleic anhydride) (PMVE / MA), hydrolyzed collagen and their esters, and poly(methyl vinyl ether / maleic anhydride) (PMVE / MAH). Therefore, when the second needle 44 is inserted into the skin S, the water-soluble or water-dispersible material of the second needle 44 is dissolved in water or body fluids.

[0052] For example, each of the second needles 44 has a pointed, tapered shape to penetrate the skin S. The second needles 44 may have a solid barrel or a hollow barrel.

[0053] The length and outer diameter of the second needle 44 can be determined depending on the application. For example, the second needle 44 has substantially the same or similar size as the first needle 24. For example, like the first needle 24, the second needle 44 may have a length between 20 μm and 1,000 μm. For cosmetic applications, to deliver gas into a thin layer of the skin S, such as the stratum corneum or epidermis, the second needle 44 may have a length between 50 μm and 250 μm. Furthermore, the second needle 44 may have an outer diameter (e.g., maximum outer diameter) between 40 μm and 200 μm. In this embodiment, the second needle 44 is a microneedle. However, the length and outer diameter of the second needle 44 are not limited to those of this embodiment.

[0054] (gas supply unit 50) 1, the gas supply unit 50 stores CO2 gas therein and supplies the CO2 gas to the injection unit 10. The gas supply unit 50 includes a gas storage section 52 and a pressure regulator 54.

[0055] Gas storage unit 52 is a cartridge for storing CO2 gas at a high pressure (for example, several MPa or several tens of MPa or more) that varies depending on the gas usage. A conventional replaceable gas cylinder can be used as gas storage unit 52. For example, the volume of gas storage unit 52 is 10 mL to 20 mL.

[0056] The gas storage unit 52 is detachably connected to a pressure regulator 54. The pressure regulator 54 delivers CO gas from the gas storage unit 52 to the gas passage 34 and regulates the pressure of the delivered CO gas. The pressure regulator 54 controls the pressure of the CO gas to be delivered to the gas passage 34 so that it is constant, and reduces the pressure of the CO gas from the gas storage unit 52 to the supply pressure for the gas passage 34. The supply pressure can be determined depending on the application. For example, the supply pressure is between 0.15 MPa (1.5 bar) and 0.4 MPa (4 bar). This allows the pressure regulator 54 to consistently maintain the pressure of the CO gas and steadily supply CO gas at an appropriate pressure to the gas passage 34.

[0057] As shown in FIG. 1, pressure regulator 54 includes an injection switch 56 and a gas reservoir connector 58 .

[0058] The injection switch 56 is a unit for a user to start / stop injection of CO2 gas into the gas passage 34. For example, the injection switch 56 may be embodied as a manual button, as shown in Fig. 1. For example, the injection switch 56 may be configured as a button for starting injection of CO2 gas into the gas passage 34 when the user presses the injection switch 56, and for stopping injection when the user releases the injection switch 56.

[0059] A one-way valve (not shown) is provided at one end of the pressure regulator 54 so as to be connected to the injection unit 10. The one-way valve allows CO2 gas to pass through the one-way valve only in one direction, from the pressure regulator 54 to the gas passage 34. This prevents CO2 gas from flowing back from the gas passage 34 to the pressure regulator 54.

[0060] A gas reservoir connector 58 connects the gas reservoir 52 to the pressure regulator 54. Any known connection mechanism is possible for the gas reservoir connector 58.

[0061] (How to Use a Device for Fluid Infusion Therapy) A method of using the device 1 according to this embodiment will now be described with reference to Figures 6A to 6D.

[0062] The user first attaches the first needle 24 to the gas nozzle 22 of the handle portion 12. Next, the user attaches the patch portion 14 to the attachment surface 32 so that the first needle 24 passes through the needle hole 46. The user also attaches the injection unit 10 to the gas supply unit 50 to assemble the device 1. Next, the user grasps the main body 20, applies the patch portion 14 to the skin S, and inserts the first needle 24 and the second needle 44 on the adhesive layer 40 into the skin S.

[0063] As shown in FIG. 6A , the first needle 24 and the second needle 44 penetrate the skin S, and the adhesive layer 40 adheres to the skin S. The user can operate the injection switch 56 to supply CO2 gas from the gas reservoir 52 to the skin S through the gas passage 34 to perform carboxytherapy. At the same time, the active ingredient in the second needle 44 gradually dissolves or disperses in the skin S, for example, in the stratum corneum and / or epidermis, thereby performing mesotherapy along with carboxytherapy. The CO2 gas can diffuse into deeper layers of the skin S than the active ingredient.

[0064] After completing the injection of a predetermined amount of CO2 gas into the skin S, the user operates the slide lever 28 to activate the pressing member 26. The slide lever 28 slides from the normal position (FIG. 6A) to the pressing position (FIG. 6B). In response to the sliding movement of the slide lever 28, the transmission member 36 moves in the +Z direction and transmits the user's force applied to the slide lever 28 to the pressing device 38, which then presses the patch portion 14 toward the skin S. As a result, the separation layer 42 is separated from the attachment surface 32, the patch portion 14 is left on the skin S, and the second needle 44 remains within the skin S. Meanwhile, the first needle 24 leaves the skin S together with the handle portion 12, as shown in FIG. 6B.

[0065] After the patch portion 14 is pushed away from the handle portion 12, the slide lever 28 returns to its normal position together with the pressing member 26, as shown in Fig. 6C. The patch portion 14 and the adhesive layer 40 continue to adhere to the skin S, and the second needle 44 remains in the skin S, and the second needle 44 continues to dissolve.

[0066] The user then removes the first needle 24 from the handle portion 12, as shown in FIG. 6D . The user can remove the first needle 24 manually or by any removal mechanism, such as a slide lever 28. Thus, the user can remove the patch portion 14 and the first needle 24 in a two-step operation; that is, the user can remove the patch portion 14 from the handle portion 12 in a first operation, and then remove the first needle 24 from the handle portion 12 in a second operation. The user can also remove the gas supply unit 50 from the handle portion 12 or the gas reservoir 52 from the gas supply unit 50. After completing mesotherapy, the user removes the patch portion 14 from the skin S.

[0067] The patch portion 14 and the first needle 24 can be completely disposable as a single-use unit. The handle portion 12, excluding the first needle 24, can be reused by disposing of the patch portion 14 and the first needle 24, which is cost-effective. It is also possible to use the patch portion 14 and the first needle 24 multiple times, as long as they are effectively sterilized.

[0068] The device 1 allows the user to perform both carboxytherapy and mesotherapy. The device 1 can be used to treat dark circles on the skin S, and can also be used for other purposes such as reducing wrinkles and fine lines, managing scars, and reducing stretch marks. Hyaluronic acid is particularly effective for reducing dark circles. However, any other water-soluble or water-dispersible active ingredient can be used.

[0069] (effect) Device 1 allows for the injection of CO2 gas along with an active ingredient, such as hyaluronic acid, in a single operation. Device 1 allows users to easily perform simultaneous injection of CO2 gas and the active ingredient. This can provide two distinct benefits—hydration and dark circle reduction—with a single treatment. Furthermore, this can save time and reduce the burden on the user, and also allow for greater synergy between carboxytherapy and mesotherapy during simultaneous injection. This enhances healing efficacy and long-lasting durability. The flow of CO2 into the skin tissue can help the active ingredient penetrate and disperse within the tissue for better filling / hydrating effects. This effect differs from the conventional sequential method of gas injection and active ingredient injection.

[0070] According to one embodiment, the patch portion 14 and the first needle 24 are detachable from the handle portion 12, thereby allowing the handle portion 12 to be easily reused.

[0071] According to one embodiment, the patch portion 14 can be separated from the handle portion 12 and adhered to the user's skin S, so that the user does not need to hold the device 1 during treatment.

[0072] According to one embodiment, the patch portion 14 can be detached from the handle portion 12 while leaving the first needle 24 on the handle portion 12. This allows the water-insoluble first needle 24 to be removed while the water-soluble or water-dispersible second needle 44 remains on the skin S, allowing the active ingredient to continue to disperse.

[0073] According to one embodiment, the patch portion 14 includes a needle hole 46 for allowing the first needle 24 to pass through. As a result, the first needle 24 protrudes from the adhesive layer 40 together with the second needle 44, and the patch portion 14 can support both the first needle 24 and the second needle 44 so that they are stably applied to the skin S.

[0074] According to one embodiment, the handle portion 12 has an internal space, and the pressing member 26 is housed within the internal space, whereby the external structure of the device 1 can be simplified to facilitate handling of the device 1. [Example]

[0075] Tests were performed using a device containing a CO2 cartridge, a pressure regulator, an injection button, and a single hollow microneedle tip. After injection, CO2 bubbles were observed within the skin using optical coherence tomography. Thus, it was demonstrated that injecting CO2 gas into the skin using a hollow microneedle is feasible.

[0076] After CO2 injection, the effects on the surrounding tissue were checked using histology. No major tissue damage was observed and tissue integrity was maintained. [Explanation of symbols]

[0077] 1 device 10 Injection Unit 12 Handle 14 Patch section 20 Main Unit 22 Gas nozzle 24 Hollow First Needle 26 Pressing member 28 Slide lever 30 connectors 32 Mounting surface 34 Gas passage 36 Transmission components 38 Pressurizer 40 Adhesive layer 42 Separation layer 44 Second Needle 46 Needle hole 50 Gas Supply Unit 52 Gas storage unit 54 Pressure Regulator 56 Injection switch 58 Gas reservoir connector

Claims

1. 1. A device for beauty therapy, comprising: An injection unit comprising: a handle portion including a fluid passage; one or more hollow first needles at an end of the handle, the one or more hollow first needles having an internal passageway in fluid communication with the fluid passageway; and one or more second needles comprising a water-soluble or water-dispersible material, the one or more second needles being separable from the handle portion; an injection unit including: a fluid supply unit configured to supply a fluid to the fluid passage; Equipped with A device wherein the injection unit is configured such that, when removed from the skin after being applied to the skin, the one or more hollow first needles move away from the skin together with the handle portion, and the one or more second needles separate from the handle portion and remain within the skin.

2. 10. The device of claim 1, wherein the injection unit has an application surface on which the one or more hollow first needles and the one or more second needles protrude toward the same side so as to be applied together to the user's skin.

3. 3. The device of claim 1 or 2, wherein the injection unit includes a patch portion detachably attached to the handle portion, the patch portion supporting the one or more second needles.

4. The device of claim 3 , wherein the patch portion includes an adhesive layer configured to support the one or more second needles and to adhere to the user's skin.

5. 5. The device of claim 3 or 4, wherein the patch portion is configured to be detached from the handle portion while leaving the one or more hollow first needles on the handle portion.

6. The device of claim 3 , wherein the patch portion includes one or more holes for allowing the one or more hollow first needles to pass through.

7. The device of claim 3 , wherein the handle portion includes a detachment mechanism configured to operably detach the patch portion from the handle portion.

8. The device of claim 7 , wherein the handle portion has an interior space, and the detachment mechanism is housed within the interior space.

9. 9. The device of claim 1, wherein the water-soluble or water-dispersible material is at least one selected from the group consisting of hyaluronic acid, monosaccharides, disaccharides, oligosaccharides, polysaccharides, dextrin, dextran, polyethylene glycol, polyvinyl alcohol, poly(methyl vinyl ether / maleic anhydride), polyvinylpyrrolidone, poly(methyl vinyl ether / maleic acid), hydrolyzed collagen, and esters thereof, and poly(methyl vinyl ether / maleic anhydride).

10. The device of claim 1 , wherein the one or more hollow first needles are removably attached to the handle portion.

11. 11. The device of claim 1, wherein the length of the one or more hollow first needles and the one or more second needles is between 20 μm and 1,000 μm.

12. 12. A device according to any preceding claim, wherein the fluid supply unit comprises a fluid reservoir and a pressure regulator operatively allowing the fluid to be supplied to the fluid passage.

13. 13. The device of claim 1, wherein the fluid is carbon dioxide gas.

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