Patent Description:
Cosmetics are the most widely used to maintain youth and beauty by preventing the skin from losing elasticity. However, under the stratum corneum of the skin epidermis, a protective barrier is formed with a thick protein protective layer, and the epidermal and dermal layers of the skin are separated by this protein protective layer, so no matter how good cosmetics are used, the active ingredients of cosmetics do not penetrate into the dermal layer, and therefore, it is difficult to obtain the effect of skin care properly only by using cosmetics. Accordingly, various technologies for penetrating cosmetics to the dermal layer are being developed.

For example, <CIT> discloses 'a skin stimulator for absorbing cosmetics' comprising: an accommodating portion <NUM> for accommodating cosmetics; a roller portion <NUM> on which a flow path through which the cosmetics are introduced is formed; a plurality of fine needles <NUM> protruding from the roller portion; and a pumping portion <NUM> for transferring cosmetics accommodated in the accommodating portion to the flow path, wherein when the roller portion <NUM> presses the skin and the fine needles <NUM> penetrate the epidermal layer of the skin, the cosmetic is delivered to the flow path by the pumping portion <NUM>, and the cosmetic flows along the surface of the needle and penetrates below the epidermal layer of the skin, so that the cosmetics penetrate to the dermal layer. However, the conventional skin stimulator has a problem in that it may damage the skin because it directly pierces the skin layer using fine needles.

<CIT> discloses a three-in-one cosmetic instrument. The three-in-one cosmetic instrument comprises an electric pulse cosmetic head extending outwards and a cosmetic instrument body; the electric pulse cosmetic head comprises a first roll shaft head, a second roll shaft head, a first roll shaft rod, a second roll shaft rod, a third roll shaft rod and a partition piece; the first roll shaftrod, the second roll shaft rod and the third roll shaft rod communicate and are connected end to end to form a main roll shaft rod; and the tail end of the third roll shaft rod is connected with the cosmetic instrument body.

<CIT> relates to an ion injector having a bipolar type probe head includes a bipolar probe head in which a fist probe(<NUM>) and a second probe(<NUM>) made of a conductive metal material are assembled into one between insulation rings(<NUM>); a main body for forming a (-) pole and a (+) pole, or a (+) pole and a (-) pole by applying at least one of a DC voltage, a DC pulse, and a AC pulse; and a connection rod for connecting the bipolar type probe head with the main body.

In order to solve this disadvantage, techniques for accelerating the absorption of cosmetics without directly damaging the skin by using electric current or far-infrared rays, infrared rays, visible light waves, vibrations or the like on the skin are being used.

For example, EP (Electroration) electroporation technology is a beauty method that promotes absorption of cosmetics by passing an electric current through the skin. Cosmetics contain high-molecular substances that are not absorbed into skin cells through cell membranes, so simply applying cosmetics to the surface of the skin is ineffective. However, when an electric current flows through the skin, the cell membrane does not pass the electric current and acts as a condenser, so an ion channel is formed so that the high-molecular substances can pass through it well.

EMS (Electrical Muscle Stimulation) electric pulse technology is a beauty method that controls muscle contraction with electrical stimulation and promotes blood circulation to increase production of elastic fibers and revitalize muscle activity. By relaxing the muscles tensed by daily facial expressions, it is very effective in preventing atrophy and sagging of the facial muscles, improving the aging of the facial muscles, and restoring the elasticity of the facial skin.

MP (Mesoporation) electroporation technology is a beauty method that gives an electric shock to the skin to form a temporary passage between cells, such that the hydrophilic ingredients of cosmetics that are not well absorbed into the skin penetrate deep into the skin. That is, electrical stimulation is applied to the skin to form a passage in the skin, and a constant current is applied to nutritional components of cosmetics in order to allow the high-molecular components to penetrate the skin by using the property that charges of the same components repel each other.

In addition, light irradiating beauty devices using a light emitting diode (LED) are also being developed. Recently, mask-type light-irradiating skin care devices that irradiate light to the face while worn on the face have been introduced, and <CIT> discloses a light-irradiating skin care device in the form of a mask worn on the face.

However, these prior patents are large in size, complicated in operation, and difficult to use, so there is a limit to satisfying various needs and convenience of general users. In addition, visiting a beauty salon or a skin care salon and having a professional take care of it is expensive in terms of time and money. And there was considerable inconvenience in using the existing light-irradiating skin care device with cosmetics while wearing it on the face.

Accordingly, there is a demand for the development of a multi-functional portable skin care device that allows users to manage their own skin relatively easily without specialized knowledge, that is easy to carry and use, and that can enhance the skin improvement effect by using stimulation such as electric current, light wave and vibration simultaneously or sequentially.

The present disclosure is to solve the problems of the prior art, and the main object of the present disclosure is to provide a multi-functional portable skin care device that is portable and convenient to use, that opens pores or micro-channels between cells without damaging the skin by using electric current, light wave and vibration, and that can enhance the effect of skin improvement by penetrating the various active ingredients of cosmetics such as whitening agents, moisturizing agents, and anti-aging to the inner skin of the human body.

The multi-functional portable skin care device according to the present invention, conceived to achieve the objectives above, comprises:.

In the present disclosure, the first roller and the second roller are made of a conductive material and are combined with the insulating ring member to have a cylindrical shape;.

A coil spring is interposed between the rear end of the conductive pipe and one connection terminal of the control circuit board, and a bent leaf spring is interposed between the rear end of the conductive rod and the other connection terminal of the control circuit board.

In the hollows of the shaft member and the conductive pipe, a first fixing sleeve and a second fixing sleeve are installed, through which the conductive rod passes such that the conductive rod does not come into contact with the inner surfaces of the shaft member and the conductive pipe, and which are made of a material that does not conduct electricity.

At the front end of the shaft member, a fixing screw for rotatably supporting the front end of the first roller is fastened, and on the outer peripheral surface of the conductive pipe, a fixing ring for rotatably supporting the rear end of the second roller is integrally formed.

At the rear end of the conductive rod, a connecting piece made of a conductive material and having a pointed end to contact the bent leaf spring is installed.

According to the invention one or more eccentric vibration motors are further installed in the hollow of the shaft member, and the vibration motor is connected to the control circuit board of the main body unit through a wire passing through the hollow of the conductive pipe.

In addition, according to the invention the device further includes a protective cover detachably coupled to the front end of the main body unit to surround and protect the roller unit, and a wireless charging cradle to which the main body unit can be vertically coupled, the wireless charging cradle having a coupling recess provided with a power transmission coil inside so that the wireless charging cradle wirelessly supplies electricity to the battery through a power receiving coil installed inside the main body unit, thereby charging the battery.

The device according to the invention further includes an auxiliary cover comprising a cover body made of a semi-circular tubular shape so as to surround an upper end of the roller unit, a connecting part extending a certain length backward from the rear end of the cover body, and a fixing part integrally formed at the rear end of the connecting part and surrounding the outer surface of the main body unit to fix.

In an embodiment, at the connecting part, a contact switch selectively contacting the surface of the conductive pipe installed to be exposed between the roller unit and the main body unit is installed, and the rear end of the contact switch is electrically connected to a conductive pad of a certain size installed on the outer circumferential surface of the main body case.

On the lower surface of the cover body, a plurality of light emitting diodes are arranged at regular intervals, and the light emitting diodes are electrically connected to the control circuit board of the main body unit through a wire disposed along the connecting part.

At the upper end of the cover body, an accommodating box capable of accommodating a cosmetic tube of a certain size is formed, on the lower surface of the accommodating box a plurality of supply holes for supplying cosmetics discharged from the cosmetic tube to an upper part of the roller unit are formed, and on one side of the accommodating box, a pressing means for discharging cosmetics to the outside of the cosmetic tube by pressing the cosmetic tube is further installed.

According to the multi-functional portable skin care device of the present disclosure, the roller unit is made of a cylindrical shape that is easy to be closer to the human skin, and when the two rollers of the roller unit contact the skin, an electric current is circulated through the two rollers and the skin, thereby contracting the muscles in the contact area and lifting the saggy facial muscles. In addition, by applying different electrodes to the first roller and the second roller, cosmetics applied on the surface of the skin can penetrate to the inner layer of the skin. In addition, by activating the skin layer by applying an alternating pulse, it has the effect of allowing the effective substances of cosmetics, of whitening agents such as vitamin C, as well as moisturizing agents such as hyaluronic acid and heparin, and anti-aging agents such as peptides and oligonucleotides, to penetrate into the inner layer of the skin more effectively.

In addition, the present disclosure has the effects that can be applied by freely switching between various skin care modes such as EP electroporation, EMS electric pulse and MP electroporation by selectively applying several current circulation modes according to the number of times the control button is pressed, and that allows effective ingredients of the cosmetics to penetrate to the inside of the skin by pushing the cosmetics into the temporarily opened pores or micro-channels between cells using a rotating roller.

In addition, the present disclosure has the effects of promoting absorption of cosmetics by opening pores or micro-channels between cells by further applying vibration or light wave stimulation along with electrical stimulation to the skin using the auxiliary cover, and of improving skin troubles using infrared or visible light, and removing wrinkles by restoring and improving skin elasticity.

In addition, the skin care device is generally used in bipolar mode, but it can also be used in unipolar mode for fine areas such as nasolabial folds on the face where two rollers cannot touch at the same time.

Hereinafter, the advantages and features of the present disclosure, and a method of achieving the same will be described with reference to the accompanying drawings through the embodiments to be described in detail later. However, a detailed description of a known technology or configuration related to the present disclosure will be omitted when it may make the subject matter of the disclosure rather unclear. In addition, the terms which will be described below are terms defined in consideration of the functions in the disclosure, and may be different according to users, intentions of the users, or customs. Therefore, the definitions of the terms should be made based on the contents throughout the specification describing the multi-functional portable skin care device according to the present disclosure. In addition, in this specification, in adding reference numbers to elements of respective drawings, it is to be noted that the same reference elements have the same reference numbers if possible even though the same reference elements are shown on different drawings.

<FIG> is a perspective view showing a preferred embodiment of a multi-functional portable skin care device according to the present disclosure, <FIG> is a perspective view of the multi-functional portable skin care device shown in <FIG>, showing a state in which a protective cover is covered and a wireless charging cradle is provided, <FIG> is a cross-sectional view of the multi-functional portable skin care device shown in <FIG>, and <FIG> is an exploded view of the multi-functional portable skin care device shown in <FIG>.

<FIG> is a perspective view showing a preferred embodiment of a multi-functional portable skin care device according to the present disclosure, <FIG> is a perspective view of the multi-functional portable skin care device shown in <FIG>, showing a state in which a protective cover is covered, <FIG> is a cross-sectional view of the multi-functional portable skin care device shown in <FIG>, and <FIG> is an exploded view of the multi-functional portable skin care device shown in <FIG>.

As shown, the multi-functional portable skin care device <NUM> of the present disclosure simultaneously or sequentially applies stimulation such as electric current, light wave and vibration to the skin to penetrate the effective ingredients of cosmetics to the inner layer of the skin without damaging the skin, thereby enhancing the effect of skin care, and it is largely composed of a roller unit <NUM>, a connecting unit <NUM> and a main body unit <NUM>. In addition, as shown in <FIG>, the multi-functional portable skin care device <NUM> of the present disclosure may further include a protective cover <NUM> and a wireless charging cradle <NUM>.

The roller unit <NUM> is a part that is in direct contact with the skin of the human body and gives an electric current, light wave and vibration to the skin, and includes a first roller <NUM> and a second roller <NUM> made of a conductive material, and an insulating ring member <NUM> installed between the first roller <NUM> and the second roller <NUM> and made of a material that does not conduct electricity. The roller unit <NUM> is made in the form of a cylindrical roller as a whole, and is installed to protrude outward from the front end of the main body unit <NUM> serving as a handle.

The connecting unit <NUM> is for electrically and mechanically connecting the roller unit <NUM> to the main body unit <NUM>, and consists of a shaft member <NUM>, a conductive pipe <NUM> and a conductive rod <NUM>. Referring to <FIG>, the shaft member <NUM> passes through the centers of the first roller <NUM>, the second roller <NUM> and the insulating ring member <NUM>, and rotatably support them. The conductive pipe <NUM> is coupled to the rear end of the shaft member <NUM>, extended to the rear by a certain length and fixed to the main body unit <NUM>, and has one end electrically connected to any one of the first and second rollers <NUM> and <NUM>. The conductive rod <NUM> is installed in the longitudinal direction through the hollows of the conductive pipe <NUM> and the shaft member <NUM>, and has one end electrically connected to any one of the first and second rollers <NUM> and <NUM>.

The main body unit <NUM> serves as a handle when the roller unit <NUM> is used, and includes a main body case <NUM> having a cylindrical shape. Inside the main body case <NUM>, a battery <NUM> for supplying electricity to the first and second rollers <NUM> and <NUM>, a control circuit board <NUM> for controlling the power supplied to the first and second rollers <NUM> and <NUM>, a control button <NUM> for selecting the current supplied to the first and second rollers <NUM> and <NUM>, and a display <NUM> for displaying the operating states of the first and second rollers <NUM> and <NUM> are included.

As shown in <FIG>, the protective cover <NUM> is a cylindrical lid detachably coupled to the front end of the main body unit <NUM> to surround and protect the roller unit <NUM>, is made of a cylindrical shape with one side open, and includes an inner case <NUM> corresponding to the shape of the roller unit <NUM> and an outer case <NUM> covering the outside of the inner case <NUM>.

The wireless charging cradle <NUM> is for charging the battery <NUM> by wirelessly supplying electricity to the power receiving coil <NUM> inside the main body unit <NUM>, and has a coupling recess <NUM> of a certain size formed on the upper surface such that the main body unit <NUM> can be vertically erected and fixed thereto.

Specifically, the roller unit <NUM> is formed in a cylindrical shape by combining the first roller <NUM>, the second roller <NUM> and the insulating ring member <NUM>, the first roller <NUM> and the second roller <NUM> are made of a conductive material, and the roller unit <NUM> has a hollow formed such that the shaft member <NUM> penetrates in the longitudinal direction.

Preferably, as shown in <FIG>, the first roller <NUM> has a first outer enlarged recess <NUM> formed at the upper end of the cylindrical body, into which first outer enlarged recess <NUM> a head 58a of a fixing screw <NUM> is inserted, and has a first inner enlarged recess <NUM> formed at the lower end, into which first inner enlarged recess <NUM> a first support ring <NUM> of the insulating ring member <NUM> is inserted. The second roller <NUM> has a second inner enlarged recess <NUM> formed at the upper end of the cylindrical body, into which second inner enlarged recess <NUM> a second support ring <NUM> of the insulating ring member <NUM> is inserted, and has a second outer enlarged recess <NUM> formed at the lower end, into which second outer enlarged recess <NUM> a fixing ring <NUM> formed on the outer circumferential surface of the conductive pipe <NUM> is inserted.

In addition, the insulating ring member <NUM> is interposed between the first roller <NUM> and the second roller <NUM>, and consists of an insulating ring <NUM> that is in contact with the other surface of the first roller <NUM> and one surface of the second roller <NUM> and whose outer peripheral surface is in contact with the skin, a first support ring <NUM> formed to protrude upward from the upper surface of the insulating ring <NUM> and inserted into the first inner enlarged recess <NUM> of the first roller <NUM> and screwed, and a second support ring <NUM> formed to protrude downward from the lower surface of the insulating ring <NUM> and inserted into the second inner enlarged recess <NUM> of the second roller <NUM> and screwed.

The shaft member <NUM> of the connecting unit <NUM> rotatably supports the roller unit <NUM>, the conductive pipe <NUM> is a hollow pipe of a certain length made of a conductive material, and is coupled to the rear end of the shaft member <NUM> to electrically and mechanically connect the roller unit <NUM> and the main body unit <NUM>, and the conductive rod <NUM> is installed in the longitudinal direction along the hollow of the conductive pipe <NUM> and electrically connects any one of the first and second rollers <NUM> and <NUM> to the main body unit <NUM>.

That is, the shaft member <NUM> consists of a first shaft pipe 51a that rotatably supports the first roller <NUM> and the first support ring <NUM> of the insulating ring member <NUM>, and a second shaft pipe 51b that is fastened to the lower end of the first shaft pipe 51a, is connected in the longitudinal direction, and rotatably supports the second support ring <NUM> of the insulating ring member <NUM> and the second roller <NUM>.

Preferably, the first shaft pipe 51a has a cylindrical shape so that the first roller <NUM> can rotate, at one end of the first shaft pipe 51a a screw thread 511a is formed on the inner surface such that the fixing screw <NUM> is screwed, the other end is extended outward by a certain length, and has a screw thread 512a formed on the outer circumferential surface so as to be inserted into the second shaft pipe 51b and screwed together. In addition, the second shaft pipe 51b has a cylindrical shape so that the second roller <NUM> can rotate, at one end of the second shaft pipe 51b a screw thread 511b is formed on the inner surface so that the first shaft pipe 51a is inserted and screwed, and at the other end a screw thread 512b is formed on the outer circumferential surface so as to be inserted into the conductive pipe <NUM> and screwed together.

In addition, the fixing screw <NUM> fastened to the front end of the first shaft pipe 51a is inserted into the first outer enlarged recess <NUM> of the first roller <NUM> installed on the shaft member <NUM> and rotatably supports, thereby fixing the first roller <NUM> so as not to be separated. In addition, the fixing ring <NUM> formed to protrude from the outer circumferential surface of the conductive pipe <NUM> is inserted into the second outer enlarged recess <NUM> of the second roller <NUM> and rotatably supports, thereby fixing the second roller <NUM> so as not to be separated.

In the hollows of the conductive pipe <NUM> and the shaft member <NUM>, a first fixing sleeve <NUM> and a second fixing sleeve <NUM> are installed, respectively. The first fixing sleeve <NUM> and the second fixing sleeve <NUM> are made of a material that does not conduct electricity, and a through hole through which the conductive rod <NUM> passes is formed in the center so that the conductive rod <NUM> does not come into contact with the inner surfaces of the conductive pipe <NUM> and the shaft member <NUM>. At this time, on the outer circumferential surface of the first fixing sleeve <NUM>, a screw thread is formed so as to be screwed to the inner periphery of the shaft member <NUM>.

Meanwhile, the main body case <NUM> is made of a cylindrical plastic molded product with one open end, and has an internal space formed such that the battery <NUM>, the control circuit board <NUM>, the LED display <NUM> and the like can be installed therein.

The battery <NUM> is a rechargeable battery, is charged with electricity through the power receiving coil <NUM>, and supplies electricity to the first and second rollers <NUM> and <NUM>. The control circuit board <NUM> controls the power supplied to the first and second rollers <NUM> and <NUM>, and includes, for example, a microprocessor, a DC-DC converter, a pulse generator, a voltage booster, and a roller polarity controller, etc. The DC-DC converter converts the voltage supplied from the battery, the pulse generator generates a DC voltage, a DC pulse, an AC pulse or the like under the control of the microprocessor, the voltage booster boosts the voltage converted by the DC-DC converter, and the roller polarity controller controls the polarities of the first and second rollers <NUM> and <NUM>, respectively.

In addition, a control button <NUM> is installed in the main body unit <NUM>, and as a user presses the control button <NUM>, the DC-DC converter, the pulse generator, the roller polarity controller and the like are driven. For example, the control button <NUM> is installed between the battery <NUM> and the control circuit board <NUM>, and in accordance with the number of times the control button <NUM> is pressed, any one of the DC mode, the DC pulse mode, the first AC pulse mode, and the second AC pulse mode is set. The LED display <NUM> shows the operating state of the first and second rollers <NUM> and <NUM>.

In addition, a movement pedestal <NUM> for preventing various parts from being damaged by vibration is installed inside the main body case <NUM>. The movement pedestal <NUM> is made of a shape corresponding to the longitudinal section of the main body case <NUM>, the control circuit board <NUM> and the battery <NUM> are fixed, and an elastic support piece <NUM> is also formed to support a button holder <NUM> installed on the upper part of the control button <NUM> to give an elastic force.

At an entrance of the main body case, a fixing plug <NUM> for fixing the connecting unit <NUM> is installed. The fixing plug <NUM> closes the entrance of the main body case <NUM>, and the conductive pipe <NUM> is fixed by passing through the fixing plug <NUM>. On the outer peripheral surface extending to the rear of the fixing plug <NUM>, a screw thread <NUM> is formed so as to be screwed onto the inner surface of the main body case <NUM>, and in the center, a through hole <NUM> is formed through which the conductive pipe <NUM> passes. In addition, the rear end of the conductive pipe <NUM> may be screwed to the inner peripheral surface of the through hole <NUM> to be fixed, and in the front part, a fixing recess <NUM> is formed such that the fixing protrusion <NUM> formed on the outer peripheral surface of the conductive pipe <NUM> is inserted and fixed.

In addition, inside the main body case <NUM>, a connector member is provided for connecting the conductive pipe <NUM> and the conductive rod <NUM> to different electrodes of the battery <NUM>. The connector member includes a coil spring <NUM> installed between the rear end of the conductive pipe <NUM> and the control circuit board <NUM>, and a leaf spring <NUM> installed between the rear end of the conductive rod <NUM> and the control circuit board <NUM>. The coil spring <NUM> is a compression spring, and is installed between the rear end of the conductive pipe <NUM> and one connection terminal of the control circuit board <NUM>. The leaf spring <NUM> is a leaf spring bent in a '<IMG>' shape, and is installed between the rear end of the conductive rod <NUM> and the other connection terminal of the control circuit board <NUM>.

Preferably, at the rear end of the conductive rod <NUM>, a connection piece <NUM> made of a material that conducts electricity well is further installed. The connection piece <NUM> has a pointed end so as to be in contact with the side surface of the leaf spring <NUM>.

At the conductive rod <NUM>, a second fixing sleeve <NUM> is further installed. The second fixing sleeve <NUM> has a cylindrical shape with a hollow in the center such that the conductive rod <NUM> passes through, and prevents the conductive rod <NUM> from coming into contact with the inner surface of the conductive pipe <NUM>. In addition, in the shaft member <NUM>, a first fixing sleeve <NUM> is installed. The first fixing sleeve <NUM> prevents the conductive rod <NUM> from contacting the inner surface of the shaft member <NUM>, is made of a material that does not conduct electricity, in the center a through hole through which the conductive rod <NUM> passes is formed, and on the outer peripheral surface a screw thread is formed so as to be screwed to the shaft member <NUM>.

Meanwhile, in the protective cover <NUM>, a magnet <NUM> is disposed between the inner case <NUM> and the outer case <NUM>. The magnet <NUM> is disposed at an edge where the protective cover <NUM> and the main body unit <NUM> meet, and at a corresponding position of the main body unit <NUM>, a corresponding magnet that attracts the magnet <NUM> is installed. In addition, a cover contact sensor (not shown) may be further installed on the protective cover <NUM>. That is, even if the control button <NUM> is pressed by the user's carelessness in the state in which the protective cover <NUM> is coupled, if it is detected by the cover contact sensor that the cover is not detached, the power-off state is continuously maintained.

The wireless charging cradle <NUM> is provided separately from the main body unit <NUM>, and on the upper surface a charging recess <NUM> is installed to a certain depth such that the lower end of the main body unit <NUM> can be inserted. At a lower portion of the charging recess <NUM>, a power transmission coil <NUM> is disposed to correspond to the power receiving coil <NUM> of the main body unit <NUM>. Accordingly, when the wireless charging cradle <NUM> is connected to an external power source, and the main body unit <NUM> is erected and inserted, then the power transmission coil <NUM> automatically detects the power receiving coil <NUM> and wirelessly supplies power to the power receiving coil <NUM>.

When assembling the multi-functional portable skin care device <NUM> according to the present disclosure, as shown in <FIG>, the second shaft pipe 51b is fastened to the front end of the conductive pipe <NUM> and coupled, the first fixing sleeve <NUM> is inserted into the second shaft pipe 51b and fastened, and then the conductive rod <NUM> is inserted into the hollow of the conductive pipe <NUM> to penetrate the first fixing sleeve <NUM> and fixed, and then the first shaft pipe 51a is inserted into the front end of the second shaft pipe 51b and fastened. At this time, the conductive rod <NUM> is installed through the second fixing sleeve <NUM>, and to the rear end of the conductive rod <NUM> the connection piece <NUM> is attached.

Then, the second roller <NUM> is coupled to the outer peripheral surface of the conductive pipe <NUM> so that the fixing ring <NUM> of the conductive pipe <NUM> is inserted into the second outer enlarged recess <NUM> of the second roller <NUM>, the insulating ring member <NUM> is coupled to the outer circumferential surface of the second shaft pipe 51b such that the insulating ring <NUM> of the insulating ring member <NUM> is in close contact with the second roller <NUM>, and the second support ring <NUM> of the insulating ring member <NUM> is fastened to the second inner enlarged recess <NUM> of the second roller <NUM>.

Then, the first roller <NUM> is coupled to the first shaft pipe 51a so as to be positioned on the outer peripheral surfaces of the first shaft pipe 51a, and the first support ring <NUM> of the insulating ring member <NUM> is inserted and fastened into the first inner enlarged recess <NUM> of the first roller <NUM>. In that case, the insulating ring <NUM> of the insulating ring member <NUM> is interposed between the first roller <NUM> and the second roller <NUM>.

Then, the fixing screw <NUM> is screwed into a fastening recess of the first shaft pipe 51a so that the head 58a of the fixing screw <NUM> is inserted and fixed into the first outer enlarged recess <NUM> of the first roller <NUM>, and the fixing ring <NUM> of the conductive pipe <NUM> is inserted and fixed into the second outer enlarged recess <NUM> of the second roller <NUM>, so that the roller unit <NUM> is rotatably installed on the outer circumferential surface of the connecting unit <NUM> and is fixed so as not to be separated.

Then, in order to fix the rear end of the conductive pipe <NUM> to the main body unit <NUM>, a fixing plug <NUM> is screwed to the entrance of the main body case <NUM> to be fixed, and then the rear end of the conductive pipe <NUM> is screwed through the through hole <NUM> of the fixing plug <NUM>. In that case, the rear end of the conductive pipe <NUM> is closely connected to one connection terminal of the control circuit board <NUM> while compressing the coil spring <NUM>, and the connection piece <NUM> installed at the rear end of the conductive rod <NUM> is closely connected to the other connection terminal of the control circuit board <NUM> while compressing the leaf spring <NUM>.

In that case, the first roller <NUM> is connected to one electrode of the battery <NUM> through the first shaft pipe 51a, the conductive rod <NUM>, the connection piece <NUM>, the leaf spring <NUM> and the control circuit board <NUM>, and the second roller <NUM> is connected to the other electrode of the battery <NUM> through the conductive pipe <NUM>, the coil spring <NUM> and the control circuit board <NUM>. That is, currents of different electrodes are supplied to the first roller <NUM> and the second roller <NUM>, but it is insulated by the insulating ring member <NUM> installed between the first roller <NUM> and the second roller <NUM>, so that a current does not directly flow between the first roller <NUM> and the second roller <NUM>.

As such, the multi-functional portable skin care device according to the present disclosure may operate in a bipolar mode, which selectively controls DC voltage, DC pulse, AC pulse, etc. applied to the first roller <NUM> and the second roller <NUM>, forms a (-) pole and a (+) pole within a short distance, and when the first roller <NUM> and the second roller <NUM> are in contact with the skin of the human body at the same time, the electric currents of different electrodes applied to the first roller <NUM> and the second roller <NUM> form a complete electric current circulation through the skin, so that a ccording to beauty methods such as EP electroporation, EMS electric pulse and MP electric penetration, pores are opened or micro-channels are formed between the skin, and cosmetic substances such as whitening agents, moisturizing agents, and anti-aging agents penetrate deep into the inner layer of the skin, thereby improving the skin.

When only one of the first roller <NUM> and the second roller <NUM> contacts to the skin, the above-described bipolar mode cannot work, but when the user directly contacts the conductive pipe <NUM> with his or her finger during use, current circulation is formed through the first roller <NUM> and the human body, so that it can also be used in a unipolar mode.

Accordingly, when the DC mode or the DC pulse mode is set according to the number of pushes of the control button <NUM>, the cosmetic applied to the skin surface penetrates into the inner layer of the skin in the direction from the (-) pole to the (+) pole. In addition, when the AC pulse mode is set, the (+) and (-) poles are repeatedly performed, so that the cosmetic applied to the skin surface penetrates into the inner layer of the skin more effectively. That is, when AC pulses are supplied, the polarity is alternately switched, so that the skin layer is activated, and thus cosmetic substances of whitening agents such as vitamin C, moisturizing agents such as hyaluronic acid and heparin, and anti-aging such as peptides and oligonucleotides and the like can more effectively penetrate the inner skin layer.

Meanwhile, <FIG> is an enlarged cross-sectional view showing another embodiment of the multi-functional portable skin care device <NUM> according to the present disclosure. As shown, in order to enhance the effect of skin penetration of cosmetics and give a massage effect, a small vibration motor <NUM> is further installed inside the roller unit <NUM>.

The vibration motor <NUM> is an eccentric motor, which is installed in the hollow of the shaft member <NUM> and is electrically connected to the battery <NUM> of the main body unit <NUM> by a wire disposed along the hollow of the conductive pipe <NUM>. In addition, between the vibration motor <NUM> and the battery <NUM>, a control circuit board <NUM> and a control button <NUM> is further installed.

Accordingly, when power is applied to the vibration motor <NUM>, the eccentric rotation shaft rotates to generate a certain vibration, and the vibration is transmitted to the skin through the first and second rollers <NUM> and <NUM>. In this case, the intensity of the vibration may be applied with different intensities in proportion to the frequency of the applied DC pulse or AC pulse.

Preferably, the vibration pattern of the vibration motor <NUM> may be generated by adjusting the skin penetration depth of vibration based on the skin penetration rate. For example, the vibration pattern may be generated by a combination of vibration information indicating a penetration rate of <NUM>% or more at a skin penetration depth of <NUM> or more. In this case, the vibration pattern may be a vibration pattern in which some or all of the frequency ranges of <NUM> to <NUM>, <NUM> to <NUM>, <NUM> to <NUM>, and <NUM> to <NUM> are combined.

<FIG> is a perspective view showing a further embodiment of the multi-functional portable skin care device according to the present disclosure, showing a state in which the auxiliary cover is installed, <FIG> is a perspective view showing a lower surface of the auxiliary cover shown in <FIG>, <FIG> is a cross-sectional view of the auxiliary cover shown in <FIG>, and <FIG> is a cross-sectional view showing another embodiment of the auxiliary cover shown in <FIG>.

As shown, the multi-functional portable skin care device <NUM> includes a roller unit <NUM>, a connecting unit <NUM>, a main body unit <NUM> and an auxiliary cover <NUM>. Since the roller unit <NUM>, the connecting unit <NUM> and the main body unit <NUM> are the same as or similar to the above-described device, the detailed description will be omitted, and hereinafter, the auxiliary cover <NUM> will be mainly described.

The auxiliary cover <NUM> is a plastic molded product, and includes a cover body <NUM> made of a semi-circular tubular shape surrounding the upper end of the roller unit <NUM>, a connecting part <NUM> extending a certain length backward from the rear end of the cover body <NUM>, and a fixing part <NUM> integrally formed at the rear end of the connecting part <NUM> and surrounding and detachably fixing the outer circumferential surface of the main body unit <NUM>.

The cover body <NUM> has a structure in which the front and rear and upper ends are closed and the lower end is open, and forms an inner space in which the above-described cylindrical roller unit <NUM> can be rotatably accommodated. A fastening bolt <NUM> installed on the front surface of the cover body <NUM> is rotatably fastened to the center of the roller unit <NUM>. For example, the fastening bolt <NUM> is fastened to a fastening recess of the first shaft pipe 51a to prevent the auxiliary cover <NUM> from being separated.

The connecting part <NUM> is made of a narrow width compared to the cover body <NUM>, installed in the upper part along the conductive pipe <NUM> installed in the roller unit <NUM> and the main body unit <NUM>, and a contact switch <NUM> that selectively contacts the conductive pipe <NUM> is installed at the connecting part <NUM>. For example, the contact switch <NUM> is slidably installed in the through portion formed in the connecting part <NUM>, and when the contact switch <NUM> is pushed forward, an elastic contact terminal <NUM> installed thereunder comes into contact with the conductive pipe <NUM>. A conductive pad <NUM> having a certain size is installed on the outer circumferential surface of the main body case <NUM>, and the rear end of the elastic contact terminal <NUM> is connected to the conductive pad <NUM>. Accordingly, when a user holds the main body unit <NUM> by hand and pushes the contact switch <NUM> to bring the elastic contact terminal <NUM> into contact with the conductive pipe <NUM>, electricity applied to the conductive pipe <NUM> flows through the elastic contact terminal <NUM> and the conductive pad <NUM> into the human body, so that it can be used in a unipolar mode similarly to when the user touches the conductive pipe <NUM> with a finger.

As shown in <FIG> and <FIG>, on the lower surface of the cover body <NUM>, a plurality of light emitting diodes <NUM> are arranged at regular intervals. The light emitting diodes <NUM> are connected to the battery <NUM> of the main body unit <NUM> through an unillustrated wire disposed along the connecting part <NUM>. In addition, between the light emitting diodes <NUM> and the battery <NUM>, a control circuit board <NUM> and a control button <NUM> may be further installed.

Preferably, the plurality of light emitting diodes <NUM> may be installed on a flexible PCB of a certain size. The wavelength band of the light emitting diodes <NUM> is preferably between <NUM> and <NUM>, but is not necessarily limited thereto. It may include an ultraviolet region having a shorter wavelength or an infrared region having a longer wavelength.

In addition, the light emitting diodes <NUM> may all be composed of light emitting diodes emitting a single wavelength, but it is preferable to configure by mixing light emitting diodes of different wavelengths. In recent years, with the development of related technologies, by forming several diodes emitting each wavelength into one chip, it is also possible to manufacture as if several wavelengths are emitted from one light emitting diode. For example, light emitting diodes 110a of infrared or visible light may be installed on the edge of the cover body <NUM>, and light emitting diodes 110b of ultraviolet may be installed on the edge of the cover body <NUM>. The light emitting diodes 110b of ultraviolet may have a function of sterilizing the roller unit <NUM>.

In addition, an optical filter plate (not shown) may be further installed on the lower surface of the cover body <NUM>. The optical filter plate may be installed under the light emitting diodes 110a of infrared or visible light to block ultraviolet and blue light-based light. That is, in the case of a white LED, a lot of blue light-based light with a low wavelength range is included, and such blue light-based light penetrates deep into the skin and generates active oxygen, which active oxygen destroys cell membranes and causes more melanin to be produced in the cells. In addition, it is also possible to install a plurality of light emitting diodes along the border of the cover body <NUM>.

As shown in <FIG>, at the upper end of the cover body <NUM>, an accommodating box <NUM> for accommodating a cosmetic tube <NUM> of a certain size is further formed. The cosmetic tube <NUM> may be made of a thin plastic material, and after being inserted into the accommodating box <NUM> in a sealed state, a part of the cosmetic tube <NUM> is opened to discharge the cosmetics to the outside. On the lower surface of the accommodating box <NUM>, a plurality of supply holes <NUM> are formed so as to supply the cosmetics discharged from the cosmetic tube <NUM> to an upper surface of the roller unit <NUM> inside the cover body <NUM>.

In addition, on one side, for example, on the rear end, of the accommodating box <NUM>, a pressing means <NUM> may be further installed which presses the cosmetic tube <NUM> to discharge cosmetics in the cosmetic tube <NUM> to the outside. For example, the pressing means <NUM> includes a pressing part <NUM> for pressing the rear end of the cosmetic tube <NUM>, a screw shaft <NUM> connected to the pressing part <NUM> and having a threaded outer circumferential surface, and a handle <NUM> fixed to the rear end of the screw shaft <NUM>. At this time, the screw shaft <NUM> passes through the fastening groove formed on the rear surface of the accommodating box <NUM>. Accordingly, when the handle <NUM> is turned and the screw shaft <NUM> is rotated, the pressing part <NUM> advances and presses the rear end of the cosmetic tube <NUM>, so that the cosmetics inside are discharged to the outside.

As such, the multi-functional portable skin care device <NUM> according to the present embodiment is easy to carry, has a beautiful appearance, and is convenient to use. In addition, the multi-functional portable skin care device <NUM> emits electric current to the skin through the first roller <NUM> and the second roller <NUM> to mimic the action potential of the central nervous system to contract muscles of the contact area and lift saggy facial muscles. The multi-functional portable skin care device <NUM> may apply different electrodes to the first roller <NUM> and the second roller <NUM>, so that the cosmetic applied to the skin surface penetrates into the inner layer of the skin in the direction from the (-) pole to the (+) pole. In addition, when AC pulses are supplied, the polarity is alternately switched, so that the skin layer is activated, and thus cosmetic substances of whitening agents such as vitamin C, moisturizing agents such as hyaluronic acid and heparin, and anti-aging such as peptides and oligonucleotides and the like can more effectively penetrate the inner skin layer.

In addition, the present disclosure can adapt to various skin care needs by freely switching between various skin care modes such as EP electroporation, EMS electric pulse and MP electroporation by selecting several current circulation modes according to the number of times the control button is pressed, and allows the effective ingredients of the cosmetics to penetrate to the inside of the skin by pushing the cosmetics into the temporarily opened pores or channels between cells using a cylindrical rotating roller that is easy to be closer to the skin.

In addition, the present disclosure is further provided with an auxiliary cover <NUM>, thereby having the effects of promoting absorption of cosmetics by applying vibration or light wave stimulation along with electrical stimulation to the skin and thus giving a massage effect and at the same time by opening pores or micro-channels between cells, and of improving skin troubles by using infrared or visible light, and improving wrinkles by restoring skin elasticity.

Claim 1:
A multi-functional portable skin care device, comprising:
a roller unit (<NUM>) including a first roller and a second roller and an insulating ring member interposed between the first roller and the second roller;
a connecting unit (<NUM>) including a shaft member passing through the centers of the first roller, the second roller and the insulating ring member, a conductive pipe of a certain length coupled to the rear end of the shaft member and connected in the longitudinal direction and electrically connected to any one of the first and second rollers, and a conductive rod of a certain length installed in the longitudinal direction along the hollows of the conductive pipe and the shaft member and electrically connected to any one of the first and second rollers; and
a main body unit (<NUM>) including a main body case mechanically connected to the roller unit through the connecting unit, a battery installed inside the main body case and supplying electricity to the first and second rollers, a control circuit board for controlling the power supplied to the first and second rollers, a control button for selecting the current supplied to the first and second rollers, and an LED display for displaying the operating state of the first and second rollers,
characterized in that in the hollow of the shaft member, one or more eccentric vibration motors (<NUM>) are installed, and the vibration motor is connected to the control circuit board of the main body unit through a wire passing through the hollow of the conductive pipe,
wherein the device further includes a protective cover detachably coupled to the front end of the main body unit to surround and protect the roller unit, and a wireless charging cradle to which the main body unit can be vertically coupled, the wireless charging cradle having a coupling recess provided with a power transmission coil inside so that the wireless charging cradle wirelessly supplies electricity to the battery through a power receiving coil installed inside the main body unit, thereby charging the battery, and
wherein the device further includes an auxiliary cover (<NUM>) comprising a cover body made of a semi-circular tubular shape so as to surround an upper end of the roller unit, a connecting part extending a certain length backward from the rear end of the cover body, and a fixing part integrally formed at the rear end of the connecting part and surrounding the outer surface of the main body unit to fix.