Skin beauty devices

Abstract

This skin aesthetic device allows for precise adjustment of the degree to which multiple needles are inserted, ensuring sufficient skin aesthetic effects, and enables easy correction of errors in needle insertion during use. [Solution] The skin beauty device 100 has a transfer mechanism that screws onto the ball screw rotating shaft of a stepping motor (SM) and moves forward from the origin position, then moves backward to return to the origin position. The transfer mechanism moves forward by a distance corresponding to the forward signal of the SM, pushing the needle bundle, so that multiple needles fixed to the needle bundle are precisely inserted into the skin to an extent corresponding to the forward signal, and alternating current supplied via the transfer mechanism is passed through the multiple needles for a predetermined time inside the skin to promote skin regeneration by forming tiny wounds. When it senses that the transfer mechanism has moved backward by a distance corresponding to the backward signal of the SM and returned to the origin position, the transfer mechanism is moved forward again by a distance corresponding to the origin correction drive signal of the SM to correct the origin position.

Description

Technical Field

[0001] The present invention relates to a skin beautifier, and more particularly, to a skin beautifier that promotes skin regeneration by passing alternating current (for example, high-frequency current, etc.) through the skin through a plurality of needles.

Background Art

[0002] The fractional device for skin beautification described in Patent Document 1 passes alternating current (for example, high-frequency current, etc.) through the skin through a plurality of needles that serve as electrodes inserted into the skin, thereby applying local thermal damage to the skin, and forming minute wounds for promoting skin regeneration from the epithelium to the dermis of the skin.

[0003] As described above, when alternating current (for example, high-frequency current, etc.) is passed through the skin through a plurality of needles to form minute wounds, it promotes the formation of new collagen in the dermis layer of the skin and can regenerate elastic fibers, and thereby, it is known that skin diseases such as skin wrinkles, enlarged pores, acne marks, stretch marks, traumatic scars, surgical scars, burn scars, etc. can be treated.

[0004] On the other hand, the fractional device for skin beautification described in Patent Document 1 has a structure in which a needle panel to which a plurality of needles are fixed does not move. When an external force is applied to a handpiece connected to the main body, only a plurality of needle portions protruding at a certain length on the needle panel come into contact with the skin or are inserted into the dermis. Therefore, it has a disadvantage that it is difficult to precisely adjust the degree of needle insertion to a level where the skin beautification effect can be sufficiently expected in consideration of the thickness of the skin (for example, the thickness from the epithelium to the dermis of the skin).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] The present invention aims to solve the above-mentioned conventional problems, and the object of the present invention is to provide a skin beauty device in which a transfer device that screws onto the ball screw rotation shaft of a stepping motor and moves forward from the origin position, then moves backward to return to the origin position, moves forward by a distance corresponding to the forward signal of the stepping motor and pushes the needle bundle, thereby precisely inserting a plurality of needles fixed to the needle bundle into the skin to an extent corresponding to the forward signal, and passing alternating current (e.g., high-frequency current) supplied via the transfer device through the plurality of needles inside the skin for a predetermined time to form minute wounds to promote skin regeneration, and when the transfer device senses that it has moved backward by a distance corresponding to the backward signal of the stepping motor and returned to the origin position, the transfer device moves forward again by a distance corresponding to the origin correction drive signal of the stepping motor to correct the origin position. [Means for solving the problem]

[0007] In order to achieve the object of the present invention as described above, the present invention relates to a skin beauty device that includes a handpiece connected to a main body by an electric wire, wherein a plurality of needles installed in the handpiece are inserted into the skin and alternating current is passed through them for a predetermined time to cause localized thermal damage, thereby forming micro-injuries to promote skin regeneration. The aforementioned main body is The device comprises: a controller that adjusts the application time of alternating current to the plurality of needles, outputs a motor drive signal to adjust the degree to which the plurality of needles are inserted into the skin while a motor drive request is made, then repeatedly performs the process of supplying alternating current to the plurality of needles inserted into the skin for the duration of the application time of alternating current, and then withdrawing the plurality of needles from the skin again at predetermined time intervals, and stops outputting the motor drive signal when the motor drive request is canceled; a power supply adjustment unit that adjusts the voltage level of the DC power supply supplied to generate the alternating current supplied to the handpiece; and an alternating current generation unit that converts the DC power supply supplied from the power supply adjustment unit into AC power to generate the alternating current supplied to the handpiece. The aforementioned handpiece is It consists of a hollow handpiece housing that serves as a handle, and a hollow needle bundle cover that is attached to or detached from the end of the handpiece housing, having multiple needle protrusion holes formed on its front surface that correspond one-to-one with the multiple needles, and having a rear opening. A stepping motor driver housed in the handpiece housing, which transmits a motor drive request input by button operation to the controller, and upon receiving the motor drive signal, outputs a forward signal, and then outputs a reverse signal after the AC electricity application time has elapsed, repeating this skin beauty process at predetermined time intervals, and ceasing to transmit the motor drive request to the controller when the input of the motor drive request is stopped; a stepping motor housed in the handpiece housing, which has a ball screw rotating shaft that rotates at a predetermined forward rotation speed corresponding to the forward signal, or at a predetermined reverse rotation speed corresponding to the reverse signal; and the front of the needle bundle plate housed in the needle bundle cover, which has an anode thin film conductive layer and a cathode thin film conductive layer laminated on the front and rear surfaces of the central insulating plate, respectively, and the surfaces of the anode thin film conductive layer and the cathode thin film conductive layer covered with an insulating layer. A needle bundle having multiple needles inserted one-to-one into multiple through holes arranged in a grid pattern through the rear surface and fixed by soldering, wherein when AC electricity is supplied, the multiple needles alternately have anode and cathode polarity adjacent to each other along the horizontal and vertical directions of the grid, all of the anode needles are connected to an anode thin film conductive layer formed on the front surface, all of the cathode needles are connected to a cathode thin film conductive layer formed on the rear surface, and an anode terminal portion connected to the anode thin film conductive layer and a cathode terminal portion connected to the cathode thin film conductive layer are formed on the left and right edges of the front surface; an AC electrical terminal plate housed in the needle bundle cover, with its front surface adhesively bonded to the rear surface of the needle bundle, and a pair of spaced-apart AC electricity supply terminal portions arranged on the surface of the central part of the rear surface, connected to the anode terminal portion and cathode terminal portion of the needle bundle;The handpiece housing has a pair of terminal pins protruding from its front end projection, which contact a pair of AC power supply terminals on the AC power terminal plate to supply AC power to multiple needles of the needle bundle. The pair of terminal pins are connected to the AC power supply unit via wires inserted into wire connection holes formed in a pair of projections on the left and right sides, and AC power supplied from the AC power generation unit is applied to the pair of terminal pins. The stepping motor then screws into the ball screw rotation shaft of the stepping motor through a screw hole on the rear, moves forward from the home position, moves backward and returns to the home position, and moves a distance corresponding to the forward signal of the stepping motor. The transfer device is characterized by comprising: a transfer device that moves forward to push the needle bundle, precisely inserting the multiple needles fixed to the needle bundle into the skin to an extent corresponding to the forward signal; supplying alternating current to the multiple needles of the needle bundle via the pair of terminal pins, the pair of AC power supply terminals of the AC power terminal plate, and the anode and cathode terminals of the needle bundle, thereby causing localized thermal damage by conducting the alternating current through the multiple needles in the skin for a predetermined time, thereby forming microscopic wounds to promote skin regeneration; and a transfer device that moves backward by a distance corresponding to the backward signal of the stepping motor to return to the origin position.

[0008] The present invention provides a skin aesthetic device, further comprising a home position sensor housed in the handpiece housing, which, when it senses that the transfer device has moved backward by a distance corresponding to the backward signal of the stepping motor and that a position sensing projection protruding from the rear side of the transfer device has returned to its home position, outputs a home position sensing signal and transmits it to the controller, wherein when a home position correction request is input by operating a button (not shown), the controller outputs a home position correction drive signal to the stepping motor driver so that the stepping motor driver outputs a home position correction signal, and while the stepping motor is rotating the ball screw rotation shaft forward at a forward rotation speed determined in accordance with the home position correction signal, the home position sensor detects a deviation from the home position of the position sensing projection of the transfer device, the output of the home position correction drive signal to the stepping motor driver is stopped, and the current position of the transfer device is corrected to the home position.

[0009] The present invention relates to a skin aesthetic device, wherein the edge portion of the needle bundle, which is housed in the needle bundle cover and has an AC electrical terminal plate adhesively bonded to its rear surface, is fixed by engaging with the front opening of a front and rear open body, and a terminal pin hole is formed in the center of the rear cover that covers the rear opening of the main body, through which a pair of terminal pins of the transfer device pass and contact a pair of AC electrical supply terminals of the AC electrical terminal plate, and a plurality of protrusions are formed along the edge of the rear cover, and the device further includes a needle bundle holder that moves the needle bundle forward when the front end of the transfer device moves forward and contacts the rear cover and the rear cover is pressed.

[0010] A skin aesthetic device according to the present invention, comprising: a needle bundle sensing plate housed in the handpiece housing, having a central through-hole through which the front end projection of the transfer device passes, a pair of projections on the left and right sides of the transfer device resting on the front and fixed thereto, spaced apart on the front with the central through-hole in between, having a pair of needle bundle sensing parts including at least one sensing pin arranged side by side on the front, and a needle bundle sensing switch positioned at a suitable location on the front spaced apart from the pair of needle bundle sensing parts; and a needle bundle cover housed in the needle bundle cover, having a central through-hole through which the front end projection of the transfer device passes, and facing the needle bundle sensing plate, The needle bundle cover plate further comprises: a magnetic device that turns on the needle bundle sensing switch by magnetic force when the pair of needle bundle sensing parts and the pair of needle bundle sensing contact parts of the needle bundle sensing plate come into electrical contact with the needle bundle cover fixed in a locked state to the end cover of the handpiece housing, and a memory that records the number of contacts each time the pair of needle bundle sensing parts and the pair of needle bundle sensing contact parts come into electrical contact with the needle bundle cover plate; and a needle bundle cover plate having a memory positioned appropriately on its rear surface.

[0011] In the skin aesthetic device according to the present invention, the controller is characterized in that it warns to discontinue the use of the needle bundle when the number of contacts of the memory on the needle bundle cover plate housed in the needle bundle cover exceeds a predetermined value.

[0012] In the skin aesthetic device according to the present invention, the stepping motor driver is characterized in that it transmits a motor drive request, which is input by button operation, to the controller when the needle bundle sensing switch of the needle bundle sensing plate housed in the handpiece housing is turned ON.

[0013] In the skin aesthetic device according to the present invention, a spring is inserted into the inner surface of the rear opening of the needle bundle cover, a plurality of projections formed along the edge of the rear cover of the needle bundle holder are inserted in a one-to-one correspondence, and a plurality of movement guide grooves are formed that guide the forward movement of the needle bundle while pressing the spring when the needle bundle moves forward, and when the transfer device moves backward, the restoring force of the spring returns the plurality of needles that were protruding through the plurality of needle protrusion holes of the needle bundle cover back to their original position inside the needle bundle cover.

[0014] In the skin aesthetic device according to the present invention, a pair of opposing locking protrusions are formed on the inner surface near the edge of the rear opening of the needle bundle cover, and the pair of locking protrusions are inserted into an L-shaped locking groove formed on the outer peripheral surface of the end of the end cover of the handpiece housing and then rotated to fix the needle bundle cover to the end cover of the handpiece housing in a locked state, and the L-shaped locking groove is formed in a locking groove that prevents the locked state from being released. [Effects of the Invention]

[0015] According to the present invention, the degree to which multiple needles fixed to a needle bundle are inserted can be precisely adjusted to a degree that allows for sufficient expectation of skin cosmetic effects, taking into account the thickness of the skin (for example, the thickness from the epithelium to the dermis of the skin). Furthermore, if an error in the degree of needle insertion occurs during use due to the forward or backward movement of the transfer device, the error in the degree of needle insertion can be easily corrected by correcting the origin position of the transfer device using the origin position sensor.

[0016] According to the present invention, all of the anodic needles among the plurality of needles fixed to the needle bundle are connected so as to be electrically connected to the anodic thin film conductive layer, and all of the cathodic needles are connected so as to be electrically connected to the cathodic thin film conductive layer. Therefore, alternating current can be uniformly and stably supplied to the plurality of needles arranged in a grid pattern with anodic and cathodic polarities alternating.

[0017] The present invention can expect the safe usability of the needle bundle by warning the suspension of use of the needle bundle used more than a determined number of times and requesting the replacement of the needle bundle.

Brief Description of the Drawings

[0018] [Figure 1] This is an embodiment showing the configuration of the skin beautifier according to the present invention. [Figure 2] This is a perspective view showing the handpiece of FIG. 1. [Figure 3] This is a front exploded view of FIG. 2. [Figure 4] This is a rear exploded view of FIG. 2. [Figure 5] This is a cross-sectional view of the needle bundle plate. [Figure 6] This is a plan view showing the anodic thin film conductive layer of the needle bundle plate. [Figure 7] This is a plan view showing the cathodic thin film conductive layer of the needle bundle plate. [Figure 8] This is a plan view showing the coupled state of the stepping motor and the transfer device. [Figure 9] This is a plan view for explaining the forward and backward movement operations of the transfer device. [Figure 10] This is a front view of the needle bundle sensing plate.

Modes for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0020] The skin beauty device according to the present invention, as described below, is not limited to the embodiments described below, and its technical spirit is such that anyone with ordinary skill in the art can modify and implement it without departing from the gist of the technology claimed in the claims.

[0021] As shown in Figures 1 to 10, the skin beauty device 100 according to the present invention includes a handpiece 120 connected to a main body 110 by an electric wire, and a plurality of needles 123c, 123c' installed in the handpiece 120 are inserted into the skin and alternating current is passed through for a predetermined time to cause localized thermal damage, thereby forming micro-injuries to promote skin regeneration.

[0022] The main body 110 comprises a controller 111, a power supply adjustment unit 112, and an AC power generation unit 113.

[0023] The controller 111 adjusts the duration for which alternating current is applied to the plurality of needles 123c, 123c', and outputs a motor drive signal that adjusts the extent to which the plurality of needles 123c, 123c' are inserted into the skin while a motor drive request is made. After supplying alternating current to the plurality of needles 123c, 123c' inserted into the skin for the duration of the alternating current application, the controller repeatedly performs the process of withdrawing the plurality of needles 123c, 123c' from the skin again at predetermined time intervals, and stops outputting the motor drive signal when the motor drive request is canceled.

[0024] The power supply adjustment unit 112 adjusts the voltage level of the DC power supply supplied to generate the AC electricity supplied to the handpiece 120, and can adjust the voltage level in 0.004V increments from DC 8V to 36V, for example.

[0025] The AC power generation unit 113 converts the DC power supplied from the power supply adjustment unit 112 into AC power to generate AC electricity supplied to the handpiece 120, and can generate, for example, a 200mA high-frequency current of 1 to 2MHz.

[0026] The handpiece 120 consists of a handpiece housing 120a and a needle bundle cover 120b. The handpiece housing 120a houses a stepping motor driver 121, a stepping motor 122, a transfer device 125, a home position sensor 126, and a needle bundle sensing plate 128. The needle bundle cover 120b houses a needle bundle 123, an AC electrical terminal plate 124, a needle bundle holder 127, and a needle bundle cover plate 129.

[0027] In the following explanations, referring to Figures 1 to 10, the term "front" is preferably understood as the top, one side, or left side, and the term "rear" is preferably understood as the bottom, another side, or right side.

[0028] For example, in the case of the needle bundle cover 120b shown in Figures 2 and 3 to 4, the needle protrusion hole 120b1 formed on the front and the opening 120b2 formed on the rear can be understood as a needle protrusion hole 120b1 formed on one side or the left side and an opening 120b2 formed on the other side or the right side when viewed with reference to the horizontal direction, and as a needle protrusion hole 120b1 formed on the top and an opening 120b2 formed on the bottom when viewed with reference to the vertical direction.

[0029] Similarly, in the case of the needle bundle 123, AC electrical terminal board 124, needle bundle holder 127, and needle bundle cover plate 129 housed in the needle bundle cover 120b, when viewed with the horizontal needle bundle cover 120b as the reference, the side facing the stepping motor 122 can be understood as the front (or top, one side, or left side), and the side facing the needle bundle cover 120b can be understood as the rear (or bottom, other side, or right side).

[0030] Furthermore, in the case of the transfer device 125 and needle bundle sensing plate 128 housed in the handpiece 120, as shown in Figures 5 to 10, when viewed with reference to the horizontal needle bundle cover 120b, the side facing the stepping motor 122 can be understood as the front (or top, one side, or left side), and the side facing the needle bundle cover 120b can be understood as the rear (or bottom, other side, or right side).

[0031] The aforementioned handpiece housing 120a is made in a hollow form and serves as a handle.

[0032] The needle bundle cover 120b is manufactured in a hollow form and is attached to or detached from the end of the handpiece housing 120a. A plurality of needle protrusion holes 120b1 are formed on the front surface, corresponding one-to-one with the plurality of needles 123c, 123c', and a rear opening 120b2 is formed.

[0033] The stepping motor driver 121 is housed in the handpiece housing 120a. After transmitting a motor drive request input by operating the button 121a to the controller 111, and upon receiving the motor drive signal, it outputs a forward signal, and then, after the AC electricity application time has elapsed, outputs a reverse signal. This process is repeated at predetermined time intervals, and when the input of a motor drive request is stopped, it stops transmitting the motor drive request to the controller 111.

[0034] The stepping motor 122 is housed in the handpiece housing 120a and includes a ball screw rotating shaft 122a that rotates at a forward rotational speed determined in response to the forward signal, or at a reverse rotational speed determined in response to the reverse signal.

[0035] The needle bundle 123 is housed in the needle bundle cover 120b, and an anode thin film conductive layer 123a2 and a cathode thin film conductive layer 123a3 are laminated on the front and rear surfaces of the central insulating plate 123a1, respectively. Multiple needles 123c, 123c' are inserted into multiple through holes 123b arranged in a grid pattern that penetrate the front and rear surfaces of the needle bundle plate 123a, with one-to-one correspondence between them, and are fixed in place by soldering.

[0036] The plurality of needles 123c, 123c' fixed to the needle bundle 123 alternately have positive and negative polarity when AC electricity is supplied, adjacent to each other along the horizontal and vertical directions of the grid.

[0037] All of the anode needles 123c, 123c' are connected to the anode thin film conductive layer 123a2 formed on the front surface so as to be electrically connected, and all of the cathode needles 123c' are connected to the cathode thin film conductive layer 123a3 formed on the rear surface so as to be electrically connected.

[0038] The needle bundle 123 has anode terminal portions 123a2' connected to the anode thin film conductive layer 123a2 and cathode terminal portions 123a3' connected to the cathode thin film conductive layer 123a3 formed on the left and right side edges of the front surface, preferably on the left and right side edges of the front surface of the needle bundle plate 123a.

[0039] The AC electrical terminal board 124 is housed in the needle bundle cover 120b, its front surface is adhesively bonded to the rear surface of the needle bundle 123, and a pair of spaced-apart AC electrical supply terminals 124a are arranged on the central surface of the rear surface, connected to the anode terminal portion 123a2' and cathode terminal portion 123a3' of the needle bundle 123 so as to be electrically connected to them.

[0040] The transfer device 125 is housed in the handpiece housing 120a, and a pair of terminal pins 125a1 protrude from its front end projection 125a, which contact a pair of AC power supply terminals 124a of the AC power terminal plate 124 to supply AC power to a plurality of needles 123c, 123c' of the needle bundle 123. For example, the pair of terminal pins 125a1 may be formed from a pair of pogo pins.

[0041] The transfer device 125 is connected to the pair of terminal pins 125a1 via wires inserted into wire connection holes 125b1 formed in a pair of protrusions 125b on the left and right sides, and applies alternating current supplied from the AC power generation unit 113 to the pair of terminal pins 125a1.

[0042] The transfer device 125 engages with the ball screw rotation shaft 122a of the stepping motor 122 through the screw hole 125c on its rear surface, moves forward from the origin position, and then moves backward to return to the origin position.

[0043] The transfer device 125 moves forward by a distance corresponding to the forward signal of the stepping motor 122, pushing the needle bundle 123, and precisely inserts the multiple needles 123c, 123c' fixed to the needle bundle 123 into the skin to an extent corresponding to the forward signal. It supplies alternating current to the multiple needles 123c, 123c' of the needle bundle 123 via the pair of terminal pins 125a1, the pair of AC power supply terminals 124a of the AC power terminal plate 124, and the anode terminals 123a2' and cathode terminals 123a3' of the needle bundle 123, thereby creating microscopic wounds to promote skin regeneration by passing the alternating current through the multiple needles 123c, 123c' into the skin for a predetermined time and inflicting localized thermal damage. The transfer device 125 then moves backward by a distance corresponding to the backward signal of the stepping motor 122, returning to the origin position.

[0044] The origin position sensor 126 is housed in the handpiece housing 120a and, when it senses that the transfer device 125 has moved backward by a distance corresponding to the reverse signal from the stepping motor 122 and that the position sensing projection 125d protruding from the rear side of the transfer device 125 has returned to the origin position, it outputs an origin position sensing signal and transmits it to the controller 111.

[0045] The origin position sensor 126 is preferably configured as a photocoupler.

[0046] When the controller 111 receives the origin position detection signal from the origin position sensor 126, and an origin correction request is input by operating a button (not shown), the controller 111 outputs an origin correction drive signal to the stepping motor driver 121 so that the stepping motor driver 121 outputs an origin correction signal. If the origin position sensor 126 detects a deviation from the origin position of the position detection projection 125d of the transfer device 125 while the stepping motor 122 is rotating the ball screw rotation shaft 122a forward at a forward rotation speed determined in response to the origin correction signal, the controller 111 stops outputting the origin correction drive signal to the stepping motor driver 121 and corrects the current position of the transfer device 125 to the origin position.

[0047] The needle bundle holder 127 is housed in the needle bundle cover 120b, and the edge portion of the needle bundle 123, to which the AC electrical terminal plate 124 is adhesively bonded to the rear surface, is fixed by engaging with the front open portion of the front and rear open body 127a.

[0048] The needle bundle holder 127 has a terminal pin hole 127b1 formed in the center of the rear cover 127b which covers the rear open portion of the body 127a, through which a pair of terminal pins 125a1 of the transfer device 125 pass and contact a pair of AC power supply terminals 124a of the AC power terminal board 124.

[0049] The needle bundle holder 127 has a plurality of protrusions 127b2 formed along the edge of the rear cover 127b, and when the front end of the transfer device 125 moves forward and comes into contact with the rear cover 127b, the rear cover 127b is pushed, causing the needle bundle 123 to move forward.

[0050] The multiple protrusions 127b2 formed along the edge of the rear cover 127b correspond one-to-one with the multiple protrusions 127a1 formed along the edge of the body 127a.

[0051] The needle bundle sensing plate 128 is housed in the handpiece housing 120a and has a central through-hole 128a through which the front end projection 125a of the transfer device 125 passes. A pair of projections 125b on the left and right sides of the transfer device 125 are fixed to the front surface, and a pair of needle bundle sensing units 128b, each containing at least one sensing pin 128b1, are arranged side by side on the front surface, spaced apart with the central through-hole 128a in between. A needle bundle sensing switch 128c is positioned at a suitable location on the front surface, spaced apart from the pair of needle bundle sensing units 128b.

[0052] The at least one sensing pin 128b1 may be formed by at least one pogo pin.

[0053] The needle bundle cover plate 129 is housed in the needle bundle cover 120b and has a central through-hole 129a through which the front end projection 125a of the transfer device 125 passes. The rear surface facing the needle bundle sensing plate 128 is spaced apart with the central through-hole 129a in between, and a pair of needle bundle sensing contact portions 129b, each containing at least one sensing contact 129b1, are arranged side by side.

[0054] The needle bundle cover plate 129 is configured such that when the needle bundle cover 120b is locked to the end cover 120a1 of the handpiece housing 120a, the pair of needle bundle sensing parts 128b and the pair of needle bundle sensing contact parts 129b of the needle bundle sensing plate 128 make electrical contact, a magnetic device 129c turns on the needle bundle sensing switch 128c by magnetic force, and a memory 129d is positioned at an appropriate location on the rear surface to record the number of contacts each time the pair of needle bundle sensing parts 128b and the pair of needle bundle sensing contact parts 129b make electrical contact.

[0055] The controller 111 warns to discontinue use of the needle bundle 123 if the number of contacts of the memory 129d of the needle bundle cover plate 129 housed in the needle bundle cover 120b exceeds a predetermined value.

[0056] The stepping motor driver 121 transmits the motor drive request input by operating button 121a to the controller 111 when the needle bundle sensing switch 128c of the needle bundle sensing plate 128 housed in the handpiece housing 120a is turned ON.

[0057] A spring S is inserted into the inner surface of the rear opening 120b2 of the needle bundle cover 120b, and a plurality of projections 127b2 formed along the edge of the rear cover 127b of the needle bundle holder 127 are inserted in a one-to-one correspondence, forming a plurality of movement guide grooves 120b3 that push the spring S and guide the forward movement of the needle bundle 123 when it moves forward, and when the transfer machine 125 moves backward, the restoring force of the spring S returns the plurality of needles 123c, 123c' that were protruding through the plurality of needle protrusion holes 120b1 of the needle bundle cover 120b back to their original position inside the needle bundle cover 120b.

[0058] A pair of opposing locking protrusions 120b4 are formed on the inner surface near the edge of the rear opening 120b2 of the needle bundle cover 120b.

[0059] The pair of locking protrusions 120b4 are inserted into an L-shaped locking groove 120a2 formed on the outer peripheral surface of the end cover 120a1 of the handpiece housing 120a, and then rotate to lock the needle bundle cover 120b to the end cover 120a1 of the handpiece housing 120a, and the L-shaped locking groove 120a2 has a locking groove 120a2' formed therein to prevent the lock from being released.

[0060] The skin beauty device 100 according to the present invention, configured as described above, operates as follows.

[0061] When the operator of the skin aesthetic device 100 locks the needle bundle cover 120b to the end cover 120a1 of the handpiece housing 120a, the pair of needle bundle sensing parts 128b and the pair of needle bundle sensing contact parts 129b of the needle bundle sensing plate 128 make electrical contact, and at the same time, the magnetic force of the magnetic 129c turns on the needle bundle sensing switch 128c.

[0062] Furthermore, each time the pair of needle bundle sensing units 128b and the pair of needle bundle sensing contact units 129b make electrical contact, the memory 129d located on the needle bundle cover plate 129 records the number of contacts, and the number of contacts recorded in the memory 129d is transmitted to the controller 111.

[0063] As described above, with the needle bundle cover 120b locked to the end cover 120a1 of the handpiece housing 120a, the needle bundle sensing switch 128c is turned ON. When the operator of the skin beauty device 100 inputs a motor drive request by pressing the button 121a on the handpiece housing 120a, the stepping motor driver 121 transmits the motor drive request to the controller 111, and the controller 111 outputs the motor drive signal and transmits it to the stepping motor driver 121.

[0064] As a result, the stepping motor driver 121, upon receiving the motor drive signal, outputs a forward signal, and then, after the AC electricity application time has elapsed, repeatedly performs a skin beauty process at predetermined time intervals, which involves outputting a reverse signal.

[0065] As described above, while the stepping motor drive 121 performs the skin cosmetic process, as shown in Figure 9, the transfer device 125 moves forward by a distance corresponding to the forward signal of the stepping motor 122 (see Figure 9(a)) to push the needle bundle 123, precisely inserting the multiple needles 123c, 123c' fixed to the needle bundle 123 into the skin to the extent corresponding to the forward signal, the pair of terminal pins 125a1 and the pair of AC power supply terminals 124a of the AC power terminal board 124 and the anode terminals of the needle bundle 123 Alternating current is supplied to the multiple needles 123c, 123c' of the needle bundle 123 via 123a2' and the cathode terminal portion 123a3', and this alternating current is passed through the multiple needles 123c, 123c' within the skin for a predetermined time, thereby causing localized thermal damage and forming micro-injuries to promote skin regeneration. The stepping motor 122 then moves backward by a distance corresponding to the backward signal (see Figure 9(b)) to return to the origin position (sensing line S1 position shown in Figure 9) in order to perform a skin cosmetic process.

[0066] In this preferred embodiment of the present invention, the motor drive signal of the controller 111 is set so that the ball screw rotating shaft 122a moves 1 mm forward or backward for each rotation (1 turn) of the stepping motor 122, and the ball screw rotating shaft 122a moves 0.0025 mm forward or backward for each pulse of the forward signal or the backward signal. This allows for precise adjustment of the degree to which the multiple needles 123c, 123c' fixed to the needle bundle 123 are inserted, taking into account the thickness of the skin (for example, the thickness from the epithelium to the dermis), to a degree that can be expected to provide sufficient cosmetic skin effects.

[0067] Furthermore, the skin beautification process performed by the transfer device 125 is terminated when the operator of the skin beautification device 100 stops pressing the button 121a on the handpiece housing 120a and stops inputting the motor drive request, causing the stepping motor driver 121 to stop transmitting the motor drive request to the controller 111, and as a result the controller 111 stops outputting the motor drive signal, the process is terminated without being executed any further.

[0068] If the skin cosmetic process performed by the transfer machine 125 is stopped after being repeatedly executed at predetermined time intervals, and errors in the insertion degree of the needles 123c and 123c' occur due to the forward or backward movement of the transfer machine 125 caused by the repeated mechanical rotation of the ball screw rotating shaft 122a of the stepping motor 122, the errors in the insertion degree of the needles 123c and 123c' can be easily corrected by correcting the origin position of the transfer machine 125 using the origin position sensor 126.

[0069] In this case, when the controller 111 receives an origin correction request via a button (not shown) operated by the operator of the skin beauty device 100, it outputs an origin correction drive signal to the stepping motor driver 121, causing the stepping motor driver 121 to output an origin correction signal. As shown in Figure 9(c), the stepping motor 122 rotates the ball screw rotation shaft 122a forward at a forward rotation speed determined in response to the origin correction signal, and during this rotation, the origin position sensing occurs. When the device 126 detects a deviation of the transfer machine 125 from its origin position, for example, as shown in Figure 9(c), when it is detected that the position sensing projection 125d of the transfer machine 125 has moved away from the sensing line S1, the output of the origin correction drive signal to the stepping motor driver 121 is stopped, and the current position of the transfer machine 125, for example, as shown in Figure 9(c), the position immediately after the position sensing projection 125d of the transfer machine 125 has moved away from the sensing line S1 is used as the origin position for correction.

[0070] On the other hand, in an embodiment of the present invention, while the skin cosmetic process is being performed by the transfer device 125, all of the anode needles 123c and 123c' fixed to the needle bundle 123 are connected to the anode thin film conductive layer 123a2 in electrical contact, as shown in Figure 6, and all of the cathode needles 123c' are connected to the cathode thin film conductive layer 123a3 in electrical contact, as shown in Figure 7. Therefore, alternating current electricity can be supplied uniformly and stably to the multiple needles 123c and 123c' arranged in a grid pattern, alternating between anode and cathode.

[0071] On the other hand, in an embodiment of the present invention, while the skin cosmetic process is performed by the transfer device 125, each time the needle bundle cover 120b is separated from the end cover 120a1 of the handpiece housing 120a and then reconnected, the number of times the pair of needle bundle sensing units 128b and the pair of needle bundle sensing contact units 129b make electrical contact is recorded in the memory 129d and transmitted to the controller 111.

[0072] In this case, if the number of times the memory 129d of the needle bundle cover plate 129 housed in the needle bundle cover 120b is contacted exceeds a predetermined value, the controller 111 will warn the user to discontinue use of the needle bundle 123 that has been used more than the predetermined number of times and request the replacement of the needle bundle 123, thereby ensuring the safe use of the needle bundle 123. [Explanation of Symbols]

[0073] 100 skin beauty equipment 110 Main Unit 111 Controller 112 Power control section 113 AC Electricity Generation Unit 120 Handpieces 120a Handpiece Housing 120a1 End cover 120a2 L-shaped lock groove 120a2' locking groove 120b Needle Bundle Cover 120b1 Needle protrusion hole 120b2 opening 121a button 121 Stepping motor driver 122 Stepping motor 122a Ball screw rotating shaft 123 Needle bundle 123a Needle bundle plate 123a1 Central insulating plate 123a2 Anode thin film conductive layer 123a2' Anode terminal section 123a3 Cathode thin film conductive layer 123a3' Cathode terminal 123a4 Insulating layer 123b Through hole 123c, 123c' needle 124 AC electrical terminal board 124a AC power supply terminal section 125 Transfer machine 125a Front end protrusion 125a1 Terminal pin 125b Protrusion 125b1 Wire connection hole 125c threaded hole 125d position sensing protrusion 126 Origin position sensor 127 Needle Bundle Holder 127a Body 127b Rear cover 127b1 Terminal pin hole 127b2 Protrusion 128 Needle bundle detection plate 128a center through hole 128b1 Sensing terminal 128b Needle bundle sensor 128c Needle Flux Sensing Switch 129 Needle bundle cover plate 129a Center through hole 129b1 sensing contact 129b Needle bundle sensing contact section 129c Magnetic 129d memory

Claims

1. A skin beauty device (100) includes a main body (110) and a handpiece (120) connected by an electric wire, wherein multiple needles (123c, 123c') installed on the handpiece (120) are inserted into the skin and alternating current is applied for a predetermined time to inflict localized thermal damage, thereby forming micro-injuries to promote skin regeneration, The main body (110) is, A controller (111) adjusts the duration for which alternating current is applied to the plurality of needles (123c, 123c'), outputs a motor drive signal to adjust the extent to which the plurality of needles (123c, 123c') are inserted into the skin while a motor drive request is made, supplies alternating current to the plurality of needles (123c, 123c') inserted into the skin for the duration of the alternating current application, and then repeatedly performs the process of withdrawing the plurality of needles (123c, 123c') from the skin again at predetermined time intervals, and stops outputting the motor drive signal when the motor drive request is canceled; A power supply adjustment unit (112) adjusts the voltage level of the DC power supply supplied to generate the AC electricity supplied to the handpiece (120); AC power generation unit (113) converts the DC power supplied from the power adjustment unit (112) into AC power to generate alternating current that is supplied to the handpiece (120); It consists of, The aforementioned handpiece (120) A hollow handpiece housing (120a) that serves as a handle; and It is a hollow needle bundle cover (120b) which is attached to or detached from the end of the handpiece housing (120a), has a plurality of needle protrusion holes (120b1) formed on its front surface that correspond one-to-one with the plurality of needles (123c, 123c'), and has a rear opening (120b2) formed thereon. A stepping motor driver (121) is housed in the handpiece housing (120a), transmits a motor drive request input by operating a button (121a) to the controller (111), and upon receiving the motor drive signal, repeatedly performs a skin beauty process at predetermined time intervals, outputting a forward signal and then a reverse signal after the AC electricity application time has elapsed, and when the input of a motor drive request is stopped, stops transmitting the motor drive request to the controller (111); A stepping motor (122) housed in the handpiece housing (120a) and equipped with a ball screw rotating shaft (122a) that rotates at a forward rotational speed determined in response to the forward signal, or at a reverse rotational speed determined in response to the reverse signal; The needle bundle plate (123a) is housed in the needle bundle cover (120b), and has an anode thin film conductive layer (123a2) and a cathode thin film conductive layer (123a3) laminated on the front and rear surfaces of the central insulating plate (123a1), respectively. Multiple needles (123c, 123c') are inserted one-to-one into multiple through holes (123b) arranged in a grid pattern that penetrate the front and rear surfaces of the needle bundle plate (123a), and are fixed in place by soldering. When AC electricity is supplied, the multiple needles (123c, 123c') move in the horizontal and vertical directions of the grid. A needle bundle (123) having alternating anode and cathode polarities along a certain direction, all of the anode needles (123c) of the plurality of needles (123c, 123c') are connected to an anode thin film conductive layer (123a2) formed on the front surface so as to be electrically connected, and all of the cathode needles (123c') of the plurality of needles (123c, 123c') are connected to a cathode thin film conductive layer (123a3) formed on the rear surface, and an anode terminal portion (123a2') connected to the anode thin film conductive layer (123a2) and a cathode terminal portion (123a3') connected to the cathode thin film conductive layer (123a3) are formed on the left and right edges of the front surface; An AC electrical terminal board (124) is housed in the needle bundle cover (120b), its front surface is adhesively bonded to the rear surface of the needle bundle (123), and its central rear surface is connected to the anode terminal portion (123a2') and cathode terminal portion (123a3') of the needle bundle (123a), with a pair of spaced-apart AC electrical supply terminal portions (124a) arranged on it; The handpiece housing (120a) has a front projection (125a) from which a pair of terminal pins (125a1) protrude to contact a pair of AC power supply terminals (124a) of the AC power terminal board (124) and supply AC power to a plurality of needles (123c, 123c') of the needle bundle (123). The pair of terminal pins (125a1) are connected to the AC power supply unit (113) via wire connection holes (125b1) formed in a pair of projections (125b) on the left and right sides, and AC power supplied from the AC power generation unit (113) is applied to the pair of terminal pins (125a1). The handpiece housing (120a) has a front projection (125a) from which a pair of terminal pins (125a1) protrudes to contact a pair of AC power supply terminals (124a) of the AC power terminal board (124) and supply AC power to a plurality of needles (123c, 123c') of the needle bundle (123 A transfer device (125) moves forward by a distance corresponding to the stepping motor (122) to push the needle bundle (123) and precisely insert the multiple needles (123c, 123c') fixed to the needle bundle (123) into the skin to the extent corresponding to the forward signal, and supplies alternating current to the multiple needles (123c, 123c') of the needle bundle (123) via the pair of terminal pins (125a1), the pair of AC power supply terminals (124a) of the AC power terminal board (124), and the anode terminal (123a2') and cathode terminal (123a3') of the needle bundle (123), thereby conducting the alternating current through the multiple needles (123c, 123c') in the skin for a predetermined time to cause localized thermal damage, thereby forming tiny wounds to promote skin regeneration, and moves backward by a distance corresponding to the backward signal of the stepping motor (122) to return to the origin position; A skin beauty device characterized by being composed of the following:

2. The handpiece housing (120a) further includes an origin position sensor (126) that, when it senses that the transfer device (125) has moved backward by a distance corresponding to the reverse signal of the stepping motor (122) and that a position sensing projection (125d) protruding from the rear side of the transfer device (125) has returned to the origin position, outputs an origin position sensing signal and transmits it to the controller (111). The controller (111), when an origin correction request is input by the operation of a button (not shown), outputs an origin correction drive signal to the stepping motor driver (121). The skin beauty device according to claim 1, characterized in that the stepping motor driver (121) outputs an origin correction signal, and while the stepping motor (122) is rotating the ball screw rotation shaft (122a) forward at a forward rotation speed determined in response to the origin correction signal, the origin position sensor (126) detects that the position sensing projection (125d) of the transfer device (125) has deviated from its origin position, the output of the origin correction drive signal to the stepping motor driver (121) is stopped, and the current position of the transfer device (125) is corrected to the origin position.

3. The edge portion of the needle bundle (123), which is housed in the needle bundle cover (120b) and to which the AC electrical terminal board (124) is adhesively bonded to the rear surface, is fixed by overlapping the front open portion of the front and rear open body (127a), and a pair of terminal pins (125a1) of the transfer device (125) pass through the center of the rear cover (127b) which covers the rear open portion of the body (127a) to the pair of AC electrical supply terminal portions (124) of the AC electrical terminal board (124) The skin beauty device according to claim 1, further comprising a needle bundle holder (127) which has terminal pin holes (127b1) that contact a), a plurality of protrusions (127b2) formed along the edge of the rear cover (127b), and which moves the needle bundle (123) forward when the front end of the transfer device (125) moves forward and contacts the rear cover (127b) and the rear cover (127b) is pressed.

4. A needle bundle sensing plate (128) is housed in the handpiece housing (120a), has a central through-hole (128a) through which the front end projection (125a) of the transfer device (125) passes, has a pair of projections (125b) on the left and right sides of the transfer device (125) that are fixed to the front, has the central through-hole (128a) in between and spaced apart on the front, has a pair of needle bundle sensing units (128b) arranged side by side, each containing at least one sensing pin (128b1), and has a needle bundle sensing switch (128c) positioned at an appropriate location on the front, spaced apart from the pair of needle bundle sensing units (128b); and The needle bundle cover (120b) is housed in the needle bundle cover (120b), and has a central through-hole (129a) through which the front end projection (125a) of the transfer device (125) passes. The rear surface facing the needle bundle sensing plate (128) is separated from the central through-hole (129a) in between, and a pair of needle bundle sensing contact portions (129b) including at least one sensing contact (129b1) are arranged side by side, and the needle bundle cover (120b) is attached to the end cover (12) of the handpiece housing (120a). A needle bundle cover plate (129) is provided with a magnetic device (129c) that turns on the needle bundle sensor switch (128c) by magnetic force when the pair of needle bundle sensor parts (128b) and the pair of needle bundle sensor contact parts (129b) of the needle bundle sensor plate (128) come into electrical contact when fixed in a locked state to 0a1), and a memory (129d) that records the number of contacts each time the pair of needle bundle sensor parts (128b) and the pair of needle bundle sensor contact parts (129b) come into electrical contact, located in an appropriate place on the rear surface; The skin beauty device according to claim 1, further comprising the above.

5. The skin beauty device according to claim 1, characterized in that the controller (111) warns to discontinue use of the needle bundle (123) when the number of contacts of the memory (129d) of the needle bundle cover plate (129) housed in the needle bundle cover (120b) exceeds a predetermined value.

6. The skin beauty device according to claim 1, characterized in that the stepping motor driver (121) transmits a motor drive request input by button (121a) operation to the controller (111) when the needle bundle sensing switch (128c) of the needle bundle sensing plate (128) housed in the handpiece housing (120a) is turned ON.

7. A spring (S) is inserted into the inner surface of the rear opening (120b2) of the needle bundle cover (120b), and a plurality of projections (127b2) formed along the edge of the rear cover (127b) of the needle bundle holder (127) are inserted in a one-to-one correspondence, forming a plurality of movement guide grooves (120b3) that guide the forward movement of the needle bundle (123) while pressing the spring (S) when the needle bundle (123) moves forward, and when the transfer device (125) moves backward, the restoring force of the spring (S) returns the plurality of needles (123c, 123c') that were protruding through a plurality of needle protrusion holes (120b1) of the needle bundle cover (120b) back to their original position inside the needle bundle cover (120b), as described in claim 1.

8. The skin aesthetic device according to claim 1, characterized in that a pair of opposing locking protrusions (120b4) are formed on the inner surface near the edge of the rear opening (120b2) of the needle bundle cover (120b), the pair of locking protrusions (120b4) are inserted into an L-shaped locking groove (120a2) formed on the outer peripheral surface of the end of the end cover (120a1) of the handpiece housing (120a), and then rotate to fix the needle bundle cover (120b) to the end cover (120a1) of the handpiece housing (120a) in a locked state, and a locking groove (120a2') is formed in the L-shaped locking groove (120a2) to prevent the lock state from being released.

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