KR20180102876A - Nailcare device operated by electric motor - Google Patents

Abstract

A motor operated nail beauty machine according to the present invention is excellent in grip feeling when held by hand, and since a gap between a hand and a grinder is narrow, precise work is possible. The motor operated nail beauty machine can be used in places in which shade is made by a rotating plate or in a dark place, and there is a merit that the rotary plate with the grinder can be easily attached to and detached from a body.

Description

[0002] Nailcare device operated by electric motor [0003]

More particularly, the present invention relates to an electric nail beauty machine, which is excellent in grip feeling when gripped by a hand, has a narrow gap between a hand and a grinder, and can be precisely machined. In a place where a shade is made by a rotary plate or in a dark place The present invention relates to an electric nail beauty machine which can be used and which can easily be detached from a body equipped with a rotary plate attached with a grinder.

In general, a nail beauty machine (or nail sharpener) is a device that polishes a nail or a nail to make it glossy. These nail beauty machines are manual and electric.

As shown in FIG. 1, the hand-operated nail beauty machine 1 has a structure in which irregularities are formed on one surface of a transparent glass rod formed long in the longitudinal direction. Although the manual nail beauty machine 1 is advantageous in that it is simple and inexpensive, there is a problem that the operator or the user has to polish the nail beauty machine 1 while reciprocally moving the nail beauty machine 1 against the nail or toenail.

On the other hand, as shown in Fig. 2, the electric nail beauty machine 10 uses the electric motor 11 to rotate the head 12 to polish a nail or a nail. The body 13 is elongated in the longitudinal direction and the head 12 is mounted on the upper end of the body 13. An abrasive paper 12a is attached to the outer circumferential surface of the head 12. Such an electric nail beauty machine 10 is disclosed in U.S. Patent Application No. US 2015/0173484.

The electric nail beauty machine (10) is used while holding the body (13) by hand. However, since the distance between the hand and the head 12 is too long, even if the hand is slightly shaken or moved inaccurately, the head 12 is greatly shaken, and the skin around the hands and the toenails may be damaged.

And since nail beauty is a precise work, it should be done with sufficient illumination. However, even when the ceiling light is sufficient or during the daytime, the hands and toenails are often darkened due to the shadow of the electric nail beauty machine 10 itself. In such a case, have.

In addition, the head 12 must be replaced in accordance with the state of the nail or the toenails or the cosmetic purpose, so that the head 12 must be detachably coupled to the electric motor 11. However, in the structure in which the head 12 is easily detachably installed, there are many cases where the electric motor 11 has a problem of idle. Therefore, a coupling structure capable of easily detachably attaching the head 12 to the electric motor 11 and preventing the problem of idling of the electric motor 11 is required.

An object of the present invention is to provide an electric nail beauty machine which is excellent in grip feeling when gripped by hand and has a narrow space between a hand and a grinder so that a precise work can be performed.

Another object of the present invention is to provide an electric nail beauty machine which can be used in a place where a shade is made by a rotating plate or in a dark place.

It is still another object of the present invention to provide an electric nail beauty machine in which a rotary plate with a grinder is easily detachable from a body.

An electric nail beauty machine (100) according to a first embodiment of the present invention includes a body (110); A battery installed inside the body 110 and an electric motor 130; A rotary drum 120 installed on the lower surface of the body 110 to be rotated by the electric motor 130 and having a plurality of first projections 123 formed at a predetermined interval on a side surface thereof; A rotary plate 140 detachably coupled to the rotary drum 120 and having a plurality of second projections 143 formed on a surface facing the rotary drum 120; And a grinder 150 coupled to the lower surface of the rotary plate 140. [

The electric nail beauty machine has a substantially cylindrical shape having a diameter (D) of 1.5 cm to 5 cm and a height (H) of 3 cm to 6 cm. When the side of the body 110 is gripped with the fingertip, the upper surface of the body 110, As shown in FIG.

The rotation of the rotary drum 120 is transmitted to the rotary plate 140 by the engagement of the first and second projections 123 and 143 and the engagement of the first and second projections 123 and 143 And the grinder 150 is rotated.

The rotary plate 140 and the grinder 150 are preferably made of a transparent or semi-transparent material through which light can pass.

In addition, an LED lamp 117 may be installed on the lower surface of the body 110 around the rotary drum 120. The light of the LED lamp 117 passes through the rotary plate 140 and the grinder 150 to illuminate the nail or the nail.

A stopper 145 may be formed on the front surface of the second projection 143. The stopper 145 is caught by the step jaw 121c formed at the lower side of the side surface of the rotary drum 120. [

A support rod 146 may be formed on the back surface of the second protrusion 143. The support member 146 supports the second protrusion 143 so that the second protrusion 143 is in close contact with the side surface of the rotary drum 120.

The upper ends of the first and second protrusions 123 and 143 may be sharpened so that the second protrusion 143 slides and fits between the first protrusions 123. The inclined surface 121a may be formed on the side surface of the rotary drum 120. [

The electric nail beauty machine 200 according to the second embodiment of the present invention comprises: a case 210 having a round bar shape as a whole; A battery 135 and an electric motor 130 installed in an inner space of the case 210; A rotating plate 240 provided at a lower end of the case 210 to be rotated by the electric motor 130; And a grinder 250 coupled to the rotating plate 240. [

The case 210 has a grip portion 211 which is gradually increased in diameter from the lower end (tip end) and is a portion to be held by hand; An inclined portion 213 whose diameter decreases from the upper end of the grip portion 211 to the lower end of the horizontal portion 215; And the horizontal portion 215 which is a portion that maintains a constant diameter from the upper end of the inclined portion 213 to the upper end of the case 210. [

The case 210 includes an upper case 210a forming an upper side of the case 210 and having a semicircular cross section; And a lower case 210b forming a lower side of the case 210 and having a semicircular cross section and being coupled with the upper case 210a to form an inner space.

The lower ends of the upper and lower cases 210a and 210b are coupled by a ring-shaped fastening ring 230 and the upper ends of the upper and lower cases 210a and 210b are coupled by a cap 235 to be sealed.

A ring-shaped support portion 216 is formed to protrude from the lower ends of the upper and lower cases 210a and 210b and the tightening ring 230 is fastened to the outer surface of the support portion 216 to be connected to the upper and lower cases 210a and 210b. 210b.

The support portion 216 and the tightening ring 230 are not in contact with the rotary plate 240 when the electric nail beauty machine is in the non-operating state, and when the electric nail beauty machine is operated and the grinder 250 polishes the hands and nails, 216 and the clamping ring 230 restrict the movement of the rotary plate 240.

The fastening ring 230 is larger in height than the support portion 216, so that the jaw 232 is formed. Since the step jaw 242 is formed on the outer circumferential surface of the rotary plate 240, the distance between the outer circumferential surface and the clamp ring 230 and the support portion 216 is kept constant.

The lower end of the upper and lower cases 210a and 210b, the rotating plate 240 and the grinder 250 may be made of a transparent or translucent material. An LED lamp 117 may be installed between the lower end of the upper and lower cases 210a and 210b and the electric motor 130. [ The light of the LED lamp 117 passes through the lower ends of the upper and lower cases 210a and 210b and the rotating plate 240 and the grinder 250 to illuminate the hands and toenails.

The electric nail beauty machine according to the present invention has the following effects.

First, the grip is excellent when gripped by hand, and the gap between the hand and the grinder is narrow, so that precise work is possible.

Second, it can be used in places where the shade is made by the rotating plate or in the dark place.

Third, the rotating plate can be easily attached to and detached from the body.

1 is a photograph showing a conventional hand-operated nail beauty machine.
2 is a view showing an electric nail beauty machine according to the prior art.
3 is a perspective view showing an electric nail beauty machine according to a first embodiment of the present invention.
Fig. 4 is a front view showing the electric nail beauty machine of Fig. 3; Fig.
Fig. 5 is an exploded perspective view showing the electric nail beauty machine of Fig. 3; Fig.
FIG. 6 is a front view showing a rotary drum provided in the electric nail beauty machine of FIG. 3;
FIG. 7 is a perspective view showing an electric nail beauty machine according to a second embodiment of the present invention; FIG.
8 is a sectional view showing the electric nail beauty machine of Fig. 7;
Fig. 9 is an enlarged view of a portion A in Fig. 8; Fig.
Fig. 10 is an enlarged view of a portion B in Fig. 8; Fig.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely examples of the present invention and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

1. First Embodiment

FIG. 3 is a perspective view showing an electric nail beauty machine according to a first embodiment of the present invention, and FIG. 4 is a front view showing the electric nail beauty machine. 5 is an exploded perspective view showing the electric nail beauty machine.

As shown in the drawing, an electric nail beauty machine 100 includes a body 110, a battery (not shown in the figure), an electric motor 130 installed inside the body 110, A drum 120, a rotating plate 140 detachably coupled to the rotating drum 120, and a grinder 150 coupled to the rotating plate 120.

The electric nail beauty machine 100 has a substantially cylindrical shape as a whole. Specifically, the electric nail beauty machine 100 has a diameter D of 1.5 cm to 5 cm and a height H of 3 cm to 6 cm. This size is such that when the side of the body 110 is gripped with a fingertip, the upper surface of the body 110 is brought into contact with the lower part of the finger or the palm of the hand, and the hand and toenails can be handled with one hand.

The upper surface of the body 110 has a horizontal surface 111 and the upper surface has an inclined surface 112. The side surface 113 of the body 110 is slightly recessed inward. This shape of the body 110 is excellent in grip feeling when the side surface 113 is held by the fingertips and does not put a burden on the fingers or palms that come into contact with the upper surfaces 111 and 112.

A battery (not shown) is installed inside the body 110, and the electric motor 130 is rotated by electric energy supplied from the battery. The on / off and rotation speed R.P.M. of the electric motor 130 are controlled by a switch (not shown) attached to the body 110.

The rotary drum 120 is connected to the shaft 131 of the electric motor 130 and rotated by the rotational force transmitted from the electric motor 130.

The rotary drum 120 includes a main body 121 and a first protrusion 123.

4 to 6, the main body 121 is connected to the shaft 131 of the electric motor 130 and is rotated by the rotational force transmitted from the electric motor 130. [ The upper surface of the main body 121 is a horizontal surface, and an upper portion of the side surface is an inclined surface 121a, and a lower surface of the main body 121 is a vertical surface 121b. A stepped step 121c is formed at the lower end of the vertical surface 121b.

 The first protrusions 123 protrude from the side surface of the main body 121 at regular intervals. The second protrusions 143 are fitted between the first protrusions 123. The number of the first protrusions 123 and the second protrusions 143 are the same. Although the figure shows six first and second protrusions 123 and 143, the number of the first and second protrusions 123 and 143 can be increased or decreased as needed.

The upper end 123a of the first projection 123 is sharp and has a shape extending from the upper end 123a to the middle 123b in the lateral direction and converging inward under the middle portion. The pointed end of the upper end 123a is for reducing the interference by making the second protrusion 143 slidable when the second protrusion 143 is fitted between the first protrusions 123, The second protrusion 143 elastically deforms the second protrusion 143 while guiding the sliding of the second protrusion 143 so that the second protrusion 143 laterally protrudes from the first protrusion 123 on both sides, And the first protrusion 123 is formed so as to be gathered inward as it goes from the middle to the bottom, the second protrusion 143 sandwiched between the first protrusions 123 is in the middle 123b, So as to prevent the second protrusion 143 from being pulled out.

The rotary plate 140 is detachably coupled to the rotary drum 120. The rotation plate 140 includes a second projection 143.

The second projection 143 is formed on both surfaces of the rotary plate 140 so as to protrude from a surface facing the rotary drum 120. The upper end 143a of the second projecting portion 143 is sharpened to reduce interference when the second projecting portion 143 is inserted between the first projecting portions 123. [ As described above, when the second projection 143 is inserted between the first projections 123, the second projection 143 is elastically deformed while applying a force to push the first projection 123 laterally, To this end, the second projecting portion 143 is preferably made of a material capable of elastic deformation (for example, synthetic resin or the like).

The second protrusion 143 may include a stopper 145 and a support 146.

The stopper 145 is formed at the upper end of the front surface of the second protrusion 143 and cooperates with the step jaw 121c of the rotary drum 120 to prevent the second protrusion 143 from being pulled out.

The support base 146 is vertically formed on the rear surface of the second projection 143 and supports the second projection 143 so as to be in close contact with the side surface of the rotary drum 120.

The second projection 143 may include only one of the stopper 145 and the support 146 and more preferably the second projection 143 having the stopper 145 and the second projection 143 having the support 146. [ The protrusions 143 are arranged alternately along the circumferential direction.

The rotating plate 140 may be made of a transparent or translucent material (for example, a transparent resin). In the body 110, an LED lamp 117 may be installed around the rotary drum 120. The LED lamp 117 is operated by electric energy supplied from a battery (not shown in the figure). When the rotary plate 140 is transparent or semitransparent, the light of the LED lamp 117 passes through the rotary plate 140 and the grinder 150 (transparent or semi-transparent) to illuminate the hands and toenails. A red arrow in FIG. 4 indicates that the light of the LED lamp 117 passes through the rotary plate 140 and the grinder 150.

The grinder 150 is coupled to the lower surface of the rotary plate 140. The coupling between the grinder 150 and the rotary plate 140 may be made by a conventional adhesive or the like.

The grinder 150 is a member for polishing a nail or a nail, and has a circular disk shape. On the other hand, there is a grinder that not only merely polishes but also has gloss at the same time as polishing. Such a grinder is disclosed in Korean Patent Publication No. 10-2016-0025182 and the like.

The grinder 150 is preferably transparent or translucent. The configuration in which the grinder 150 is transparent or translucent allows the operator (user) to see the hand and the nail through the grinder 150 and the rotary plate 140 in cooperation with the configuration in which the rotary plate 140 is transparent or translucent, Thereby preventing the skin from being scratched.

If the grinder 150 and the rotary plate 140 are transparent or translucent, the light of the LED lamp 117 may pass through the grinder 150 and the rotary plate 140 to illuminate the hand and the nail. ), It is possible to work safely and precisely in the place where the shade is made or in the dark place.

Meanwhile, the manual nail beauty machine (1, grinder) shown in FIG. 1 is made using a translucent material (for example, glass). The translucent material or the transparent material ).

2. Second Embodiment

FIG. 7 is a perspective view showing an electric nail beauty machine according to a second embodiment of the present invention, and FIG. 8 is a sectional view showing the electric nail beauty machine. 7 to 8, the same reference numerals as in Figs. 1 to 6 denote the same elements.

As shown in the figure, the electric nail beauty machine 200 includes a casing 210, a battery 135 installed inside the casing 210, an electric motor 130, a rotary plate 240 rotated by the electric motor 130, And a grinder 250 provided on the rotary plate 240.

The case 210 has a circular rod shape as a whole. The case 210 includes a grip portion 211, an inclined portion 213, and a horizontal portion 215.

The grip portion 211 is a portion where the diameter increases gradually from the lower end (tip end) of the case 210 to the upper end, and is a portion that the user holds with the finger. When the user grasps the grip portion 211 with his / her finger, the grip portion 211 and the grinder 250 are very close to each other, so that a precise operation is possible.

The inclined portion 213 is a portion where the diameter gradually decreases toward the upper side and means from the upper end of the grip portion 211 to the starting point of the horizontal portion 215. The inclination of the inclined portion 213 is larger than the inclination of the grip portion 211. [

The horizontal portion 215 is a portion which maintains a constant diameter and means from the end of the inclined portion 213 to the upper end of the case 210. The horizontal portion 215 is in contact with the portion between the thumb and the index finger when the finger grips the grip portion 211. The configuration in which the diameter of the horizontal portion 215 is smaller than the diameter of the grip portion 211 allows for precise work Help.

Meanwhile, the case 210 includes an upper case 210a and a lower case 210b. The upper case 210a forms an upper side of the case 210 and has a semicircular cross section. The lower case 210b forms the lower side of the case 210 and has a semicircular cross section.

The upper and lower cases 210a and 210b are combined to form an internal space and form a grip portion 211, an inclined portion 213, and a horizontal portion 215. [

The semicircular protrusions are formed on the lower surfaces of the upper and lower cases 210a and 210b and the semicircular protrusions form a ring shaped support portion 216 when the upper and lower cases 210a and 210b are combined The lower ends of the lower cases 210a and 210b are coupled to each other when the cylindrical ring 230 is fitted to the outer circumferential surface of the support portion 216. [

형사의 턱(232)이 형성된다. Since the fastening ring 230 is higher than the support portion 216 and is coupled to the outer circumferential surface of the support portion 216, the inner space formed by the fastening ring 230 and the support portion 216

The jaws 232 of the detectors are formed.

The semicircular protrusions are formed at the upper ends of the upper and lower cases 210a and 210b such that when the upper and lower cases 210a and 210b are combined, When the hemispherical cap 235 is fitted on the outer peripheral surface of the fitting portion 217, the upper ends of the lower case 210a and the lower case 210b are coupled to each other.

The battery 135 supplies electric energy to the electric motor 130 and the LED lamp. The battery 135 is preferably rechargeable, but is not limited thereto, and various types of commercially available batteries may be used. The battery 135 can be recharged using the charging terminal 133.

The electric motor 130 is connected to the rotary plate 240 by a rotary shaft 131. When the switch 134 is turned on and the electric motor 130 is operated, the rotary shaft 131 is rotated to rotate the rotary plate 240. As a result, the grinder 250 attached to the rotary plate 240 is rotated, Or the nail is polished.

The electric motor 130 is installed in the case 210 by being fitted into the fixed ribs 137 and 138. The fixed ribs 137 and 138 support the upper and lower ends of the electric motor 130 and support the repulsive force received by the electric motor 130 at the time of grinding the hands and nails.

The rotating shaft 131 is installed to penetrate the shaft hole formed in the lower surface of the case 210. The tip of the rotating shaft 131 is integrally coupled to the rotating plate 240.

The rotary plate 240 is rotated by the rotary shaft 131. A circular groove is formed in the rotary plate 240, and a grinder 250 is attached (joined) to the groove. The combination of the grinder 250 and the rotary plate 240 may be made of an adhesive or the like.

A step jaw 242 is formed on the side surface of the rotary plate 240.

As described above, the protrusion 232 is formed by the support portion 216 and the fastening ring 230. The side surface of the rotation plate 240 is supported by the support portion 216 and the fastening ring 230 Maintain a constant distance. More specifically, when the electric nail beauty machine 200 is not operated, the rotary plate 240 maintains a certain distance from the support portion 216 and the fastening ring 230 (i.e., the support portion 216 and the fastening ring 230 And the switch 134 is turned on and the grinder 250 polishes the hands and the nail, the rotation plate 240 moves slightly to the left and right due to the reaction of the polishing, And the tightening ring 230 restricts (restricts) the movement of the rotary plate 240.

Meanwhile, when the rotary plate 240 rotates while being in contact with the support portion 216 and the fastening ring 230, the rotational force is lost by that much, and the rotary plate 240 is worn, so that the service life of the product is reduced. In order to solve such a problem, in the present invention, the rotary plate 240 is rotated while maintaining the non-contact state with the support portion 216 and the fastening ring 230, and the grinder 250 contacts the rotary plate 240, The step portion 242 is formed on the side surface of the rotary plate 240 so that the support portion 216 and the fastening ring 230 restrict the movement of the support portion 216 216 are made lower than the height of the fastening ring 230 so that the jaws 232 are formed.

The grinder 250 is attached to the rotary plate 240, and protrudes outward from the fastening ring 230. The grinder 250 is rotated together with the rotating plate 240 to polish the nail or the nail. The grinder 250 is a circular disk-shaped nail beauty machine 1, preferably transparent or semitransparent.

Meanwhile, the electric nail beauty machine 200 according to the present embodiment may further include an LED lamp 117. In this case, the grinder 250, the rotating plate 240, and the lower end of the case 210 are made of a transparent or translucent material. The LED lamp 117 may be installed at the lower end of the case 210.

The LED lamp 117 receives power from the battery 135. The LED lamp 117 is turned on when the switch 134 is turned on and the light of the LED lamp 117 passes through the lower end of the case 210 and the rotating plate 240 and the grinder 250, You can illuminate its surroundings.

The LED lamp 117 is installed inside the case 210 as compared with the case where the LED lamp 117 is installed on the outer surface of the case 210. Accordingly, the user can work without electric lighting even when the electric nail beauty machine 200 is shaded by hand and / or by hand.

100, 200: electric nail beauty machine 110: body
120: rotary drum 130: electric motor
140, 240: a rotating plate 150, 250: a grinder

Claims (10)

A body 110;
A battery installed inside the body 110 and an electric motor 130;
A rotary drum 120 installed on the lower surface of the body 110 to be rotated by the electric motor 130 and having a plurality of first projections 123 formed at a predetermined interval on a side surface thereof;
A rotary plate 140 detachably coupled to the rotary drum 120 and having a plurality of second projections 143 formed on a surface facing the rotary drum 120; And
And a grinder 150 coupled to a lower surface of the rotary plate 140,
The electric nail beauty machine has a substantially cylindrical shape having a diameter (D) of 1.5 cm to 5 cm and a height (H) of 3 cm to 6 cm. When the side of the body 110 is gripped with the fingertip, the upper surface of the body 110, Respectively,
The rotation of the rotary drum 120 is transmitted to the rotary plate 140 by the engagement of the first and second projections 123 and 143 and the first and second projections 123 and 143, So that the grinder (150) is rotated. The method according to claim 1,
Wherein the rotary plate (140) and the grinder (150) are made of a transparent or translucent material through which light can pass. 3. The method of claim 2,
An LED lamp 117 is installed on the lower surface of the body 110 around the rotary drum 120,
Characterized in that the light of the LED lamp (117) passes through the rotating plate (140) and the grinder (150) to shine nails or claws. 4. The method according to any one of claims 1 to 3,
A stopper 145 is formed on the front surface of the second protrusion 143. The stopper 145 is caught by a step jaw 121c formed on the lower side of the rotary drum 120,
A support base 146 is formed on a rear surface of the second protrusion 143 and a support base 146 supports the second protrusion 143 such that the second protrusion 143 is in close contact with the side surface of the rotary drum 120 , Electric nail beauty machine. 5. The method of claim 4,
The second projection 143 has only one of the stopper 145 and the support base 146,
Characterized in that a second projection (143) on which the stopper (145) is formed and a second projection (143) on which the support base (146) are formed are arranged alternately along the circumferential direction. 5. The method of claim 4,
The upper ends of the first and second protrusions 123 and 143 are formed to be pointed so that the second protrusion 143 can be slidably inserted between the first protrusions 123,
And an inclined surface (121a) is formed at the upper side of the side surface of the rotary drum (120). A case 210 having a circular rod shape as a whole;
A battery 135 and an electric motor 130 installed in an inner space of the case 210;
A rotating plate 240 provided at a lower end of the case 210 to be rotated by the electric motor 130; And
And a grinder (250) coupled to the rotating plate (240)
In the case 210,
A grip portion 211 whose diameter gradually increases from the lower end (tip end) and which is a portion to be held by hand;
An inclined portion 213 whose diameter decreases from the upper end of the grip portion 211 to the lower end of the horizontal portion 215; And
And the horizontal portion 215 which is a portion that maintains a constant diameter from an upper end of the inclined portion 213 to an upper end of the case 210,
In the case 210,
An upper case 210a forming an upper side of the case 210 and having a semicircular cross section; And
And a lower case 210b forming a lower side of the case 210 and having a semicircular cross section and being coupled with the upper case 210a to form an inner space,
The lower ends of the upper and lower cases 210a and 210b are coupled by a ring-shaped fastening ring 230 and the upper ends of the upper and lower cases 210a and 210b are sealed by being coupled by the cap 235 Featured, electric nail beauty machine. 8. The method of claim 7,
A ring-shaped support portion 216 is formed to protrude from the lower ends of the upper and lower cases 210a and 210b,
The fastening ring 230 is fastened to the outer surface of the support portion 216 to couple the upper and lower cases 210a and 210b,
The grinder 250 is projected outwardly from the clamping ring 230,
The support portion 216 and the tightening ring 230 are not in contact with the rotary plate 240 when the electric nail beauty machine is in the non-operating state, and when the electric nail beauty machine is operated and the grinder 250 polishes the hands and nails, 216) and the tightening ring (230) limit the movement of the rotary plate (240). 9. The method of claim 8,
The fastening ring 230 is larger in height than the support portion 216 and the step jaw 242 is formed on the outer circumferential surface of the rotary plate 240 so that the distance between the outer circumferential surface and the fastening ring 230 and the support portion 216 is maintained constant Wherein the nail device is an electric nail device. 10. The method according to any one of claims 7 to 9,
The lower ends of the upper and lower cases 210a and 210b, the rotary plate 240 and the grinder 250 are made of a transparent or translucent material,
An LED lamp 117 is installed between the lower end of the upper and lower cases 210a and 210b and the electric motor 130,
Characterized in that the light of the LED lamp (117) passes through the lower ends of the upper and lower cases (210a) and (210b), the rotating plate (240) and the grinder (250) to illuminate the hands and toenails.

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