Microneedle device

Abstract

Disclosed is a microneedle device. The microneedle device according to an embodiment of the present application includes a link part that moves in a vertical direction by a first motor, a needle mold group including a plurality of needles and a fixing part that makes the plurality of needles form an inclination with the vertical direction and fix, a medicine supply part, and a moving part provided at a rear end of the fixing part that advances or retreats the needle mold group in the inclination direction of the needles based on the movement of the link part in the vertical direction and receives the medicine supplied from the medicine supply part. The embodiment of the present application provides a microneedle device that can completely inject a quantitative medicine into the inside of the skin by inserting the microneedle in the inclination direction into the skin, thereby injecting the medicine even at a depth of a shallow surface of the skin.

Description

Technical Field

[0001] This invention relates to microneedle devices, and more specifically, to a microneedle device that, by inserting microneedles into the skin at an angle, enables the complete injection of a measured amount of drug into the skin, even at a shallow depth on the skin surface. Background Technology

[0002] Currently, modern people, who are paying increasing attention to skin beauty, are trying various skin treatments such as acne treatment, pore shrinking, wrinkle removal, scar removal, and anti-aging.

[0003] Generally, cosmetics or medications delivered through the skin have difficulty penetrating the stratum corneum, resulting in a very low absorption rate.

[0004] Therefore, mesotherapy, which involves injecting medication into the skin using syringes, is becoming increasingly common. Mesotherapy refers to a treatment that uses microneedles to directly apply the necessary drug components to the treatment site. In other words, it is a method of injecting medication directly into the skin layer.

[0005] When administering medication using this method, the drug is injected between the dermis and fat layers of the skin. At this point, it is necessary to evenly inject the medication over a relatively wide treatment area. Therefore, after inserting the needle into the patient's skin, a measured amount of medication is injected, and then the needle is withdrawn and inserted into other areas, repeating this process.

[0006] At this point, it is crucial to insert the needle accurately into the skin at the predetermined depth, but a drawback is that the insertion depth is very shallow. Typically, existing microneedles are inserted into the skin vertically. However, because the needle tip is angled, the tip cannot fully penetrate the skin when reaching the target location. This results in the problem of medication leaking to the outside of the skin due to incomplete penetration.

[0007] [Existing Technical Documents]

[0008] [Patent Documents]

[0009] (Patent Document 1) Korean Patent No. 10-1066883 (September 16, 2011) "Current-Applying Multi-Point Injection Needle and Automatic Injection Device".

[0010] (Patent Document 2) Korean Patent No. 10-1656660 (2016.09.06) "A needle assembly for skin application that can use drugs and high frequency". Summary of the Invention

[0011] Technical issues

[0012] The object of one embodiment of the present invention is to provide a microneedle device that, by inserting the microneedle into the skin at an angle, can completely inject a fixed amount of drug into the skin even when injecting the drug at a shallow depth on the skin surface.

[0013] Furthermore, the present invention aims to provide a microneedle device that can inject drugs through a needle module while applying high frequency.

[0014] The technical problems of this invention are not limited to those described above. Those skilled in the art can further understand technical problems not mentioned herein or other technical problems through the following description.

[0015] Technical solution

[0016] According to an embodiment of the present invention, a microneedle device includes a connecting rod portion that moves in a vertical direction via a first motor; a needle module comprising a plurality of needles and a fixing portion, the fixing portion causing the plurality of needles to be inclined and fixed to the vertical direction; a drug supply portion; and a moving portion disposed at the rear end of the fixing portion, which, according to the movement of the connecting rod portion in the vertical direction, causes the needle module to move forward or backward in the inclined direction of the needles, and receives the supplied drug from the drug supply portion.

[0017] The lower end of the connecting rod portion has a first inclined portion, and the moving portion has a second inclined portion corresponding to the first inclined portion. When the connecting rod portion descends and the first inclined portion applies pressure to the second inclined portion, the needle module can move forward.

[0018] The drug supply unit includes a syringe body containing a drug and a piston that moves up and down based on a second motor. The internal space of the moving part is connected to the internal space of the fixed part. The moving part may have a drug injection port that is connected to the end of the syringe body via a hose.

[0019] The moving part may further include a support part that elastically supports the needle module so that it has a restoring force in the backward direction.

[0020] The connecting rod portion may include a first ball screw and a connecting rod. The first ball screw includes a first screw driven by the first motor and a first nut. The connecting rod is mounted on the first nut and moves in a vertical direction.

[0021] The drug supply unit includes a second ball screw, which includes a second screw driven by the second motor and a second nut. The piston can be engaged with the second nut.

[0022] The device may further include: a housing having the needle module and the moving part arranged thereon, with a fixing protrusion and a support spring fixing part protruding from the front; and a skin fixing part having a sliding body part, a skin contact part, and a support spring, with a fixing groove formed at the rear of the sliding body part for the fixing protrusion to be inserted into; the skin contact part being joined to the lower part of the sliding body part, and a support spring receiving groove formed on the upper part; the upper end of the support spring being fixed to the support spring fixing part, the lower end being fixed to the support spring receiving groove, and having a downward restoring force.

[0023] The needle module may further include an electrode plate for mounting the needle, and the electrode plate may further include a high-frequency power supply for applying a high frequency.

[0024] The device may further include a housing for arranging the needle module and the movable part, and further include a skin fixing part mounted on the front of the housing, having a restoring force toward the needle side.

[0025] Invention Effects

[0026] The embodiments of the present invention have at least the following effects:

[0027] According to an embodiment of the present invention, the microneedle device can fully insert the tip of the needle into the skin even when the needle is inserted to a shallow depth by inserting the microneedle into the skin.

[0028] In addition, by inserting microneedles into the skin at an angle, a fixed amount of drug can be completely injected into the skin, even at a shallow depth.

[0029] In addition, the needle module can be used to simultaneously inject drugs and apply them at high frequency at the treatment site.

[0030] In addition, the treatment site can be accurately targeted through the lower shell and skin fixation part.

[0031] The effects of the present invention are not limited to the above-described exemplary content; this specification contains many more effects. Attached Figure Description

[0032] Figure 1 This is a perspective view of a microneedle device according to a first embodiment of the present invention.

[0033] Figure 2 and Figure 3 This is a side view of the main part of the microneedle device according to the first embodiment of the present invention.

[0034] Figure 4 This is a perspective view of the needle module of the microneedle device according to the first embodiment of the present invention.

[0035] Figure 5 This is a perspective view of the lower housing of the microneedle device according to the first embodiment of the present invention.

[0036] Figure 6 This is an illustration of microneedle insertion in a microneedle device according to a first embodiment of the present invention.

[0037] Figure 7 This is a perspective view of the moving part of the microneedle device according to the first embodiment of the present invention.

[0038] Figure 8 This is a variation of the microneedle device according to the first embodiment of the present invention.

[0039] Figure 9 This is a three-dimensional schematic diagram of the main parts of the microneedle device according to the second embodiment of the present invention.

[0040] Figure 10 This is a perspective view of a microneedle device according to a third embodiment of the present invention.

[0041] Figure 11 This is an explanatory diagram of the skin fixation portion of the microneedle device according to a third embodiment of the present invention.

[0042] Figure 12 This is a perspective view of the skin fixation portion of the microneedle device according to a third embodiment of the present invention.

[0043] Figure 13 This is an instructional diagram of the operation of the skin fixation part of the microneedle device according to the third embodiment of the present invention.

[0044] Figure 14 This is a perspective view of a microneedle device according to a fourth embodiment of the present invention.

[0045] Figure 15 This is a side view of the main part of the microneedle device according to the fourth embodiment of the present invention.

[0046] (Explanation of reference numerals in the attached diagram)

[0047] 1000, 2000, 3000: Microneedle devices

[0048] 100: Connecting rod section; 200: Needle module

[0049] 300: Mobile Department; 400: Drug Supply Department

[0050] 500: Lower housing 600: Lower cover

[0051] 700: High-frequency application area; 800, 900: Skin contact area Detailed Implementation

[0052] This invention can be modified in various ways and has many embodiments. Specific embodiments are illustrated in the accompanying drawings and described in detail. The effects, features, and methods of this invention will become clearer from the accompanying drawings and the embodiments described below. It should be understood that this invention is not limited to the embodiments disclosed below, and can be implemented in various forms, including all modifications, equivalents, and substitutions within the concept and technical scope of this invention.

[0053] Before proceeding with the description, the terminology used in the specific description will be explained. In the following embodiments, terms such as "first" and "second" are not intended to be limiting; they are used to distinguish one constituent element from other constituent elements. Therefore, the "first constituent element" described below can naturally also be a "second constituent element" within the technical concept of the present invention. Furthermore, unless otherwise explicitly stated in the specification, singular expressions include plural expressions. In addition, terms such as "comprising" or "having" indicate features, numbers, steps, actions, constituent elements, components, or combinations thereof described in the specification, and do not preclude the possibility of including at least one other feature or constituent element.

[0054] Furthermore, for ease of explanation, the sizes of the constituent elements in the accompanying drawings may be enlarged or reduced. For example, for ease of explanation, the sizes and thicknesses of the components shown in the drawings are arbitrarily defined, and the present invention is not necessarily limited to them.

[0055] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing the invention with reference to the accompanying drawings, the same or corresponding constituent elements are labeled with the same reference numerals, and repeated descriptions thereof are omitted here.

[0056] The first embodiment of the present invention relates to a microneedle device, which, by inserting the microneedle into the skin at an angle, enables the complete injection of a fixed amount of drug into the skin, even at a shallow depth on the skin surface.

[0057] Figure 1 This is a perspective view of the microneedle device according to the first embodiment of the present invention. Figure 2 and Figure 3 This is a side view of the main part of the microneedle device according to the first embodiment of the present invention.

[0058] The microneedle device 1000 according to the first embodiment of the present invention includes a connecting rod portion 100, a needle module 200, a moving portion 300, a drug supply portion 400, a lower housing 500, and a lower cover 600.

[0059] The connecting rod 100 is a component that moves the needle module 200 in an inclined direction so that the needle 210 is inserted into the skin surface at a predetermined angle. The connecting rod 100 includes a first motor 110, a first ball screw 120, and a connecting rod 130.

[0060] The first ball screw 120 includes a first screw 121 and a first nut 122. The first nut 122 is mounted on the first screw 121 and is raised and lowered based on the first motor 110. The first ball screw 120 can be a known ball screw.

[0061] In this embodiment, the first screw 121 is arranged in a vertical direction. Moreover, a first motor 110 is provided above the first screw 121. The first screw 121 rotates based on the drive of the first motor 110, while simultaneously causing the first nut 122 to rise and fall.

[0062] The connecting rod 130 is a component that moves vertically based on the drive of the first motor 110 while causing the needle 210 to move forward or backward in the inclined direction.

[0063] The connecting rod 130 is fixed to the first nut 122. Furthermore, a first inclined portion 131 is formed at the lower end of the connecting rod 130. This will be described in detail later.

[0064] Figure 4 This is a perspective view of the needle module of the microneedle device according to the first embodiment of the present invention. Figure 5 This is a perspective view of the lower housing of the microneedle device according to the first embodiment of the present invention. Figure 6 This is an illustration of microneedle insertion in a microneedle device according to a first embodiment of the present invention.

[0065] The needle module 200 includes needles 210, a fixing part 220, and a needle guide 230. Multiple needles 210 are mounted on the fixing part 220. In this case, the needles 210 are mounted obliquely to the vertical direction, i.e., the length direction of the first screw 121. Alternatively, they are mounted obliquely to the underside of the lower housing 500.

[0066] Figure 4 The illustration shows 12 needles 210, but this is not a limitation. Obviously, the number of needles 210 can be increased or decreased as needed. In addition, the needles 210 are shown arranged in a column, but they can also be arranged in multiple columns, and adjacent needles 210 can be further arranged to be staggered.

[0067] Driven by the aforementioned connecting rod 100, the needle module 200 moves forward or backward along the tilt direction of the needle 210 (see reference). Figure 3 Therefore, instead of being inserted perpendicular to the skin surface, it is inserted at a predetermined angle to the skin surface. This embodiment is set to insert at a 25° angle relative to the skin, but it is not limited to this. That is, it can be inserted at a predetermined angle to the skin surface, and this insertion angle can be selected as needed.

[0068] The tip of the needle 210 is typically angled. In this embodiment, the angled surface of the tip of the needle 210 is arranged parallel to the skin surface at the insertion site (see reference). Figure 6 When the needle 210 is inserted into the skin at an angle, since the angled surface of the needle 210 is arranged parallel to the skin surface, even if the needle is inserted into the skin at a shallow depth, the tip of the needle 210 can be fully inserted into the skin, thereby allowing a fixed amount of drug to be completely injected into the skin.

[0069] The fixing part 220 has a needle insertion part 221 for inserting and fixing needles 210 respectively, and a drug supply hole 222 is formed at the rear of the fixing part 220. The needle 210 passes through the needle insertion part 221 and is fixed, and the end of the needle 210 is arranged in the drug supply hole 222 so that the drug is supplied to the inside of the needle 210.

[0070] Additionally, a protrusion 223 is formed on the rear side of the fixing part 220. The protrusion 223 is inserted into and fixed to the moving part 300.

[0071] The needle guide 230 is a component used to guide the movement of the needle 210. In this embodiment, the needle guide 230 is arranged at the front end of the needle 210. A semi-circular first groove 231 is formed on the lower surface of the needle guide 230, which corresponds to the number of needles 210. The needle guide 230 is arranged inside the lower housing 500, and through the semi-circular second groove 510 formed on the lower housing 500, it is formed into a circular guide groove.

[0072] The lower housing 500 is provided with a needle module 200 and a moving part 300. During the procedure, the lower part of the lower housing 500 is in close contact with the skin surface.

[0073] Figure 7 This is a perspective view of the moving part of the microneedle device according to the first embodiment of the present invention.

[0074] The moving part 300 is a component that moves the needle module 200 forward or backward in the inclined direction of the needle 210 based on the vertical movement of the connecting rod 130. The moving part 300 is attached to the rear end of the fixed part 220.

[0075] The internal space of the movable part 300 communicates with the internal space of the fixed part 220 (i.e., the inside of the drug supply hole 222 and the needle insertion part 221), and a drug injection port 330 is formed in a region. The drug injection port 330 is connected to the drug supply part 400 through a hose 450 to supply drugs.

[0076] Furthermore, a second inclined portion 310 corresponding to the first inclined portion 131 of the connecting rod 130 is formed on the moving part 300. As a result, the first motor 110 is driven, and the connecting rod 130 descends based on the first ball screw 120. Then, the first inclined portion 131 comes into contact with the second inclined portion 310. When the first inclined portion 131 applies pressure to the second inclined portion 310, the moving part 300 slides along the inclined direction of the needle 210, and the needle module 200 coupled with the moving part 300 moves forward in the inclined direction of the needle 210.

[0077] By precisely controlling the drive of the first motor 110, the needle module 200 can be inserted into the skin at the desired depth. Even if the insertion depth is shallow, the tip of the needle 210 can be fully inserted into the skin because the inclined surface of the needle tip is parallel to the skin surface. Therefore, leakage of the drug to the outside of the skin can be prevented, so that the metered amount of drug supplied by the drug supply unit 400 can be completely injected into the skin.

[0078] Additionally, the moving part 300 includes a support part 320. The support part 320 is a component used to return the advancing needle module 200 to its original position after drug administration. In this embodiment, there is a pair of support parts 320, arranged on both sides or the bottom of the moving part 300, and each includes a spring 321 with restoring force in the backward direction of the moving part 300. The spring 321 is arranged in a spring receiving groove 520 of the lower housing 500 (see reference). Figure 6 When the first inclined part 131 applies pressure to the second inclined part 310, the moving part 300 slides in the inclined direction of the needle 210 while compressing the spring 321. If the connecting rod 130 moves upward based on the reverse rotation of the first motor 110, the contact between the first inclined part 131 and the second inclined part 310 is released, and the spring 321 returns to its original position, thereby the needle module 200 returns to its original position.

[0079] The drug supply unit 400 is a component that supplies drugs to the inside of the needle 210. The drug supply unit 400 includes a syringe body 410, a piston 420, a second motor 430, and a second ball screw 440.

[0080] The syringe body 410 stores medication. In this embodiment, the lower end of the syringe body 410 is disposed within a housing. The housing in this embodiment includes a lower housing 500 and a lower cover 600 that is coupled to the upper part of the lower housing 500. Specifically, the lower end of the syringe body 410 is disposed on the lower housing 500 or on the lower cover 600 that is coupled to the upper part of the lower housing 500. Specifically, a connector 460 is arranged on the lower housing 500 or the lower cover 600, connecting to a medication injection port 330 and a tubing 450. The lower end of the syringe body 410 is inserted into the connector 460. Furthermore, for ease of explanation, the lower housing 500 and the lower cover 600 are described separately in this embodiment; however, the lower housing 500 and the lower cover 600 are not necessarily separate components and can also be integrally formed.

[0081] The second ball screw 440 includes a second screw 441 and a second nut 442. The second nut 442 is mounted on the second screw 441 and moves up and down. The second ball screw 440 can be a known ball screw.

[0082] A second motor 430 is provided above the second screw 441, and the second screw 441 rotates based on the drive of the second motor 430, while simultaneously raising and lowering the second nut 442.

[0083] A piston engagement portion is formed or coupled on the second nut 442, and a piston 420 is mounted on the piston engagement portion.

[0084] The second ball screw 440 rotates under the drive of the second motor 430, which in turn causes the second nut 442 to descend. As the piston 420 descends, the drug inside the syringe body 410 is injected into the needle 210 through the tubing 450.

[0085] By precisely controlling the drive of the second motor 430, a measured amount of medication can be injected into the needle 210. Furthermore, the needle 210 is inserted into the skin at an angle, with the angled tip of the needle 210 parallel to the skin surface, allowing the tip of the needle 210 to be fully inserted into the skin. This prevents medication leakage to the outside, ensuring that the measured amount of medication supplied by the medication supply unit 400 is completely injected into the skin.

[0086] Furthermore, the arrangement of the aforementioned components can be designed according to the device's design, size, and the practitioner's preferences, thus various variations exist (see [reference]). Figure 8 ).

[0087] The operation of the microneedle device according to the first embodiment of the present invention will now be described.

[0088] Before the procedure, the first inclined part 131 and the second inclined part 310 are in a state of contact release and spring 321 is restored, and the needle module 200 is arranged in its original position.

[0089] After the practitioner determines the treatment site, the lower part of the shell 500 is placed tightly against the predetermined position behind the treatment site.

[0090] The first motor 110 is driven by the output trigger (not shown), and the first screw 121 rotates in one direction based on the drive of the first motor 110, while the first nut 122 descends.

[0091] As the connecting rod 130 fixed to the first nut 122 descends, the first inclined portion 131 contacts the second inclined portion 310 of the moving portion 300, and the first inclined portion 131 applies pressure to the second inclined portion 310 based on the continuous rotation of the first screw 121.

[0092] The moving part 300 slides forward along the tilting direction of the needle 210 based on the pressure applied by the first tilting part 131, and compresses the spring 321.

[0093] As a result, the needle module 200 slides forward along the inclined direction of the needle 210, and the needle 210 is inserted into the skin along the inclined direction. At this time, since the inclined surface of the tip of the needle 210 is parallel to the skin surface, the tip of the needle 210 can be fully inserted into the skin.

[0094] The insertion depth of the needle 210 can be adjusted based on the control of the first motor 110.

[0095] After the needle 210 is inserted along the inclined direction, it drives the second motor 430.

[0096] The second ball screw 440 rotates under the drive of the second motor 430, which in turn causes the second nut 442 to descend. As the piston 420 descends, the drug inside the syringe body 410 is injected into the needle 210 through the tubing 450.

[0097] After the medication is injected into the skin, the first motor 110 rotates in reverse and drives the first screw 121 to rotate in reverse, thereby causing the first nut 122 to rise. As the connecting rod 130 fixed to the first nut 122 rises, the contact between the first inclined part 131 and the second inclined part 310 is released, and the spring 321 returns to its original position.

[0098] Based on the restoration of spring 321, needle module 200 and moving part 300 return to their original positions.

[0099] Repeat the above process in the future.

[0100] Next, the microneedle device according to the second embodiment of the present invention will be described.

[0101] According to a second embodiment of the present invention, the microneedle device can inject a fixed amount of drug into the skin even when the drug is injected at a shallow depth on the skin surface by inserting the microneedle into the skin at an angle. High frequency can be applied while injecting the drug through the needle module.

[0102] Figure 9 This is a three-dimensional schematic diagram of the main parts of the microneedle device according to the second embodiment of the present invention.

[0103] The microneedle device 2000 according to a second embodiment of the present invention includes a connecting rod portion 100, a needle module assembly 200, a moving portion 300, a drug supply portion 400, a lower housing 500, and a high-frequency application portion 700. In this embodiment, the connecting rod portion 100, the needle module assembly 200, the moving portion 300, the drug supply portion 400, the lower housing 500, and the lower cover 600 are the same as in the first embodiment, therefore, repeated descriptions will be omitted.

[0104] The high-frequency application unit 700 includes an electrode plate 710 and a high-frequency power supply 720. Each needle 210 is made of a conductive metal material. The electrode plate 710 is formed of a conductive material and is in contact with the needle 210. As an example, a through hole is formed on the electrode plate 710 and arranged inside the fixing part 220, and the needle 210 is interference-fitted with the through hole and in contact with it.

[0105] High-frequency current is applied to electrode plate 710 by high-frequency power supply 720, and this high-frequency current directly stimulates the skin, thereby doubling the pharmacological effect of the drug injected into the skin. Specifically, after needle 210 is inserted to the treatment depth, a high-frequency current is applied to needle 210, creating an environment where surrounding tissue is not damaged, but only the delicate treatment site is activated by the high-frequency effect, rapidly achieving the drug's effect through vasodilation.

[0106] Then, because the drug is injected through needle 210, the drug penetration is accelerated, which can enhance the pharmacological effect. Therefore, the same or higher effect can be obtained with less drug, reducing the consumption of expensive drugs. However, in the embodiments of the present invention, the high-frequency application time point is described as before drug injection, but it can also be applied at any time point after drug administration, at the same time as drug administration, or any combination thereof.

[0107] The application method of the high-frequency power supply 720 is not limited to unipolar or bipolar methods. That is, depending on the configuration of the motor, the high-frequency power supply 720 can be applied in either unipolar or bipolar mode.

[0108] Next, the microneedle device according to the third embodiment of the present invention will be described.

[0109] Figure 10 This is a perspective view of a microneedle device according to a third embodiment of the present invention. Figure 11 This is an explanatory diagram of the skin fixation portion of the microneedle device according to a third embodiment of the present invention. Figure 12 This is a perspective view of the back of the skin fixation portion of the microneedle device according to a third embodiment of the present invention. Figure 13 This is an instructional diagram of the operation of the skin fixation part of the microneedle device according to the third embodiment of the present invention.

[0110] The microneedle device 3000 according to a third embodiment of the present invention includes a connecting rod portion 100, a needle module 200, a moving portion 300, a drug supply portion 400, a lower housing 500, a lower cover 600, and a skin fixing portion 800. This embodiment may also optionally include the high-frequency application portion 700 of the second embodiment.

[0111] In this embodiment, the connecting rod 100, needle module 200, moving part 300, drug supply part 400, and lower housing 500 are the same as in the first and second embodiments, so repeated descriptions are omitted.

[0112] The skin fixation part 800 is a component used to fix the treatment site. In this embodiment, the skin fixation part 800 is arranged on the front of the lower cover 600. The skin fixation part 800 includes a sliding body part 810 and a skin contact part 820.

[0113] The sliding body portion 810 has a space for arranging a support spring 830 inside it, and a slide plate 811 protruding inward from the rear of the side end. Furthermore, a fixing groove 812 and a guide groove 813 are formed on the rear of the slide plate 811.

[0114] In addition, the skin contact portion 820 is attached to the lower end of the sliding body portion 810, and a support spring receiving groove 821 is formed on it.

[0115] The front of the lower cover 600 has a support spring fixing part 610, a guide part 620 and a fixing protrusion 630.

[0116] The upper end of the support spring 830 is fixed to the support spring fixing part 610 and the lower end is fixed to the support spring receiving groove 821. The support spring 830 has a downward restoring force. As a result, a downward moving force is applied to the skin fixing part 800.

[0117] Furthermore, a fixing protrusion 630 is accommodated on the fixing groove 812 on which the sliding body portion 810 is formed, which is used to fix and arrange the skin fixing portion 800.

[0118] That is, by accommodating the fixing protrusion 630 into the fixing groove 812, the skin fixing part 800 is fixedly arranged on the lower cover 600, at which time the support spring 830 is in a compressed state. In addition, the inside of the slide plate 811 is in a state separated from the guide part 620.

[0119] If the user removes the skin-fixing part 800 from the fixing groove 812, the installation between the skin-fixing part 800 and the lower cover 600 is released, and the skin contact part 820 will move downward based on the restoring force of the support spring 830. At this time, the slide plate 811 slides together with the guide part 620, and the fixing protrusion 630 moves along the guide groove 813. The step of the guide groove 813 functions as a stopper to limit the movement of the fixing protrusion 630.

[0120] If only the lower part of the lower housing 500 is in close contact with the patient's skin, the treatment site may not be effectively secured due to misalignment. However, with the skin fixation part 800 installed on the lower cover 600, if necessary, the patient can remove the skin fixation part 800 from the fixation protrusion 630, causing the skin fixation part 800 to move downwards based on the restoring force of the support spring 830. Therefore, by first placing the skin fixation part 800 against the front of the treatment site, and then ensuring the lower housing 500 is in close contact with the body, the first motor 110 can be driven to accurately aim and insert the needle 210 into the treatment site.

[0121] Next, the microneedle device according to the fourth embodiment of the present invention will be described.

[0122] Figure 14 This is a perspective view of a microneedle device according to a fourth embodiment of the present invention. Figure 15 This is a side view of the main part of the microneedle device according to the fourth embodiment of the present invention.

[0123] The microneedle device 4000 according to the fourth embodiment of the present invention includes a connecting rod portion 100, a needle module 200, a moving portion 300, a drug supply portion 400, a lower housing 500, a lower cover 600, and a skin fixing portion 900. This embodiment may also optionally include the high-frequency application portion 700 of the second embodiment.

[0124] In this embodiment, the connecting rod 100, needle module 200, moving part 300, drug supply part 400, and lower housing 500 are the same as in the first and second embodiments, so repeated descriptions are omitted.

[0125] The skin fixation part 900 is a component used to fix the treatment site. In this embodiment, the skin fixation part 900 is arranged in front of the needle module 200. The skin fixation part 900 includes a pair of torsion bars 910 and a shaft 920.

[0126] A pair of torsion bars 910 are configured to have restoring forces toward the needle 210 side via torsion springs 911, and a shaft 920 connects the spaced-apart pair of torsion bars 910 to each other. At this time, the lower end of the shaft 920 is arranged below the lower housing 500.

[0127] If only the lower part of the lower housing 500 is in close contact with the practitioner's skin, the treatment site may not be effectively fixed due to deviation or other reasons. However, by providing the skin fixing part 900 and arranging the lower end of the shaft 920 below the lower housing 500, the lower housing 500 can be pressed against the body after the shaft 920 is first pressed against the front of the treatment site, and then the first motor 110 is driven to accurately aim and insert the needle 210 into the treatment site.

[0128] According to the embodiments of the present invention described above, a microneedle device is provided, which, by inserting the microneedle into the skin at an angle, enables the complete injection of a fixed amount of drug into the skin, even at a shallow depth on the skin surface.

[0129] All examples or exemplary terms (e.g., "such as") used in this specification are for the purpose of better describing the invention and do not limit the scope of the invention, which depends on the claims. It will be understood by those skilled in the art that various modifications, combinations, and alterations can be made within the scope of the claims and their equivalents, depending on design conditions and factors.

[0130] Therefore, the ideas of the present invention are not limited to the above embodiments, and all scopes of the following claims and their equivalents or equivalent variations are within the scope of the ideas of the present invention.

Claims

1. A microneedle device, comprising: The connecting rod section moves vertically via a first motor; A needle module, comprising a plurality of needles and a fixing part, wherein the fixing part causes the plurality of needles to be inclined and fixed to the vertical direction; Drug Supply Department; as well as A movable part, disposed at the rear end of the fixed part, moves the needle module forward or backward in the tilting direction of the needle based on the movement of the connecting rod part in the vertical direction, and receives the supplied drug from the drug supply part. The lower end of the connecting rod has a first inclined portion. The moving part has a second inclined part corresponding to the first inclined part. When the connecting rod descends and the first inclined part applies pressure to the second inclined part, the needle module moves forward.

2. The microneedle device as described in claim 1, characterized in that: The drug delivery unit includes a syringe body containing the drug and a piston that moves based on a second motor. The internal space of the movable part is connected to the internal space of the fixed part, and the movable part has a drug injection port that is connected to the end of the syringe body via a hose.

3. The microneedle device as described in claim 2, characterized in that... : The moving part further includes a support part that elastically supports the needle module so that it has a restoring force in the backward direction.

4. The microneedle device as described in claim 2, characterized in that: The connecting rod section includes a first ball screw and a connecting rod. The first ball screw includes a first screw driven by the first motor and a first nut. The connecting rod is mounted on the first nut and moves in a vertical direction.

5. The microneedle device as described in claim 3, characterized in that: The drug supply unit includes a second ball screw, which comprises a second screw and a second nut driven by the second motor. The piston is engaged with the second nut.

6. The microneedle device as described in claim 1, characterized in that, Further includes: The housing has the needle module and the moving part arranged thereon, and a fixing protrusion and a supporting spring fixing part are formed protruding from the front. as well as The skin fixation part includes a sliding body part, a skin contact part, and a support spring. The rear of the sliding body part has a fixing groove for the fixing protrusion to be inserted. The skin contact part is connected to the lower part of the sliding body part and has a support spring receiving groove formed on its upper part. The upper end of the support spring is fixed to the support spring fixing part, the lower end is fixed to the support spring receiving groove, and has a downward restoring force.

7. The microneedle device as described in claim 1, characterized in that: The needle module further includes an electrode plate for mounting the needle. The electrode plate further includes a high-frequency power supply for applying high frequencies.

8. The microneedle device as described in claim 1, characterized in that: It further includes a housing for arranging the needle module and the moving part. It further includes a skin fixation part, which is mounted on the front of the housing and has a restoring force toward the needle side.

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