KR20170103597A - A skin care device - Google Patents

Abstract

Provided is a skin care device. According to an embodiment of the present invention, the skin care device comprises: a main body including at least one light source capable of emitting light having each different wavelength range onto skin of a user; a pair of contact electrodes separated on the same plane of the main body for simultaneous contact with the skin of the user, and altering electric environments in skin by creating potential differences in skin upon power application; and a light-penetrable cover disposed at the front side of the light source. According to the present invention, it is possible to increase user convenience.

Description

{A skin care device}

The present invention relates to a skin care device, and more particularly, to a skin care device capable of realizing various effects by respective wavelength bands through light of different wavelengths and protecting a user's eyes from light emitted from a light source .

In general, skin beauty devices are roughly classified into skin beauty devices that transmit ultrasonic waves to users' skin and skin beauty devices that apply currents.

That is, the skin-beauty apparatus using ultrasound physically taps the skin, and the skin-beauty apparatus applying the electric current applies current to the skin of the user to ionize the sebum or waste materials to remove it from the skin, It is a way to absorb deeply into the skin.

The skin beauty device that allows the ampoule to be absorbed by the skin through the electrical stimulation applied to the skin, evenly applying the ampoule to the skin side to be cared for, then, while operating the skin beauty device, And when the ion head is rubbed evenly over the area to which the ampoule is applied, the power is applied through the conduit handle and the ion head to stimulate the absorption of the ampoule by receiving electrical stimulation of the skin.

However, the conventional skin beauty device has to keep the state in which the one hand is kept in contact with the nosing hand while touching the area where the skin care is desired, so that the user always has to handle the predetermined position.

In addition, since the conventional skin beauty device does not have means for preventing the light irradiated from the light source from directly irradiating the user's eyes when the light source generating the predetermined wavelength for the skin improvement effect is provided, There is an inconvenience that a separate safety goggle must be worn to prevent glare.

KR 10-2014-0039459 A

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides a skin care device in which a pair of contact electrodes are disposed on the same surface to perform an iontophoresis function even if the user does not grasp a predetermined position. There is a purpose.

It is another object of the present invention to provide a skin care device capable of irradiating light of different wavelength band through a single light source, thereby obtaining various skin improving effects through one device.

It is another object of the present invention to provide a skin care device that can protect a user's eyes by limiting the angle of irradiation of light emitted from a light source through a pair of contact electrodes.

According to an aspect of the present invention, At least one light source disposed inside the case and capable of irradiating light of different wavelength bands; A pair of contact electrodes which are disposed on the same surface of the case so as to simultaneously contact the skin of the user and generate a potential difference on the skin when power is applied to change the electrical environment of the skin; And a translucent cover disposed on the front side of the light source.

The light source may include a plurality of light emitting devices having different wavelength bands. For example, the plurality of light emitting devices may include a first light emitting device having an arbitrary wavelength in a band of 400 to 480 nm, a second light emitting device having an arbitrary wavelength in a 550 to 610 nm band, and a second light emitting device having an arbitrary wavelength in a 610 to 650 nm band. 3 light emitting devices.

In addition, the case may include a hollow seating surface extending inwardly along an upper rim, the pair of contact electrodes being disposed on the seating surface, and the translucent cover may be disposed on a hollow portion of the seating surface .

In addition, the light source is disposed on the lower side of the transparent cover, and the light emitted from the light source to the outside may be limited in the emission range of light emitted to the outside by at least one of the seating surface and the contact electrode.

Further, the contact electrode may have an extension extending a certain length downward from the rim, and the edge formed by the rim of the extension and the contact electrode may be formed as a curved surface.

The light source may be turned on when the distance sensed by the sensor is within a predetermined range, and may be turned off when the distance exceeds the predetermined range.

The light source may be turned on when the pair of contact electrodes are all in contact with the user's skin and the distance between the light source and the skin is within a predetermined range.

The circuit board may include a circuit board on which the light source is mounted. The pair of contact electrodes may be electrically connected to the circuit board through a pair of elastic members having electrical conductivity.

The elastic member includes a first portion mounted on the circuit board and a second portion inclined at a predetermined angle from an end of the first portion, and a portion of the second portion is connected to a lower surface of the contact electrode Can be contacted.

In addition, the case may be hermetically sealed by an open bottom through an end cap, and the circuit board may be detachably coupled to a support frame inserted into the case.

Further, the transparent cover and the pair of contact electrodes may be formed integrally with the case.

In addition, the light-transmitting cover may have an insertion groove formed at a predetermined depth from the upper surface so as to insert an extended portion extending a certain length downward from the rim of the contact electrode.

In addition, a button for selecting on / off of the power source and a light emitting mode of the light source may be provided on one side of the case.

In addition, it may include a notification unit linked with the operation of the button.

The notification unit may be a vibration motor that generates vibration for a predetermined time during operation of the button, or may be sound output means for outputting sound to the outside.

The translucent cover may have a transmittance of 70 to 90%.

In addition, the seating surface may include an inclined surface having a predetermined inclination with respect to the horizontal surface, and a pair of contact electrodes may be disposed on the inclined surface.

According to the present invention, the pair of contact electrodes are disposed on the same surface, and the iontophoresis function can be performed even if the user does not grasp the predetermined position, thereby improving the usability.

In addition, the present invention can irradiate light of different wavelength band through a single light source, so that various skin improving effects can be simultaneously obtained through one device.

Furthermore, the present invention can protect the eyes of the user by limiting the angle of irradiation of the light emitted from the light source through the pair of contact electrodes, so that safety can be improved without using any additional member such as a safety glass.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a skin beauty device according to an embodiment of the present invention;
FIG. 2 is a sectional view of FIG. 1,
Fig. 3 is a view showing a state before the casing, the contact electrode and the transparent cover are integrated in Fig. 2,
Fig. 4 is a view showing the connection relationship between the circuit board, the elastic member, the sensor and the vibration motor in Fig. 2,
FIG. 5 is a partial cut-away view of a front side of a case in a skin care device according to the present invention,
Fig. 6 is an enlarged view of the portion "A " in Fig. 5,
FIG. 7 is a partially cutaway side view of a case of a skin care device according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

The skin care device 100 according to an embodiment of the present invention includes a case 110, a light source 120, contact electrodes 130a and 130b and a translucent cover 140 as shown in FIGS. 1 and 2 do.

The case 110 has a general outer shape and is adapted to receive various components such as the light source 120, the circuit board 122, and the battery 162 and protect them from the external environment.

To this end, the case 110 is provided in an enclosure shape having a predetermined accommodation space for accommodating the various components. At this time, a seating surface 112 on which the contact electrodes 130a and 130b are disposed may be provided on one side of the case 110 (see FIG. 3).

For example, the case 110 may have a hollow seating surface 112 extending a predetermined length inward along an upper rim, and a translucent cover 140 may be disposed on the hollow portion of the seating surface 112 .

One side of the case 110 is opened to allow the various components to be inserted into the accommodation space side, and one side opened through the end cap 170 is sealed. For example, the lower portion of the case 110 may be opened and the lower portion may be closed through an end cap 170 detachably coupled to the lower portion of the case 110.

The case 110 may include a pair of contact electrodes 130a and 130b disposed on the seating surface 112 and a transparent cover 140 disposed between the contact electrodes 130a and 130b, have. For example, the case 110, the contact electrodes 130a and 130b, and the transparent cover 140 may be integrated through insert molding.

The supporting frame 160 (see FIG. 1) in which various components are fastened to the receiving space side through the opened lower portion of the case 110 in a state where the transparent cover 140, the contact electrodes 130a and 130b and the case 110 are integrated And then the end cap 170 is fastened, the assembling of all parts can be completed.

At this time, the seating surface 112 may be formed as an inclined surface having a predetermined inclination at an angle with respect to the horizontal plane. For example, the seating surface 112 may include an inclined surface having a relatively lower height than the left side of the bottom surface of the case 110, as shown in FIG. 1, and a pair of contacts The electrodes 130a and 130b may be disposed.

Accordingly, the pair of contact electrodes 130a and 130b provided on the inclined surface are also arranged to have a predetermined slope with respect to the horizontal plane. This makes it possible to widen the contact area between the pair of contact electrodes 130a and 130b and the skin when the user touches the user's skin. When the user holds the case 110 in use, the pair of contact electrodes 130a, 130b to contact the skin, even if the wrist is not excessively broken, natural contact between the user's skin and the contact electrodes 130a, 130b can be achieved.

Here, the seating surface 112 may be formed as an inclined surface or a partially inclined surface.

The light source 120 generates light having a predetermined wavelength band and irradiates the light to the user's skin side so that the user can obtain a beneficial effect according to the wavelength of light.

At this time, the skin care device 100 according to the present invention is configured to allow the light source 120 to irradiate light of different wavelength bands so as to obtain a unique effect that can be obtained in different wavelength bands through one device And one or more light sources 120 may be provided.

To this end, the light source 120 may include a plurality of light emitting devices that emit light of different wavelength bands. That is, the light source 120 may be implemented as a single chip by mounting a plurality of LEDs, each emitting light of different wavelength band, on one substrate. For example, the plurality of light emitting devices may be integrally formed in a single chip shape in which three light emitting units for emitting light of different wavelength bands are formed.

The plurality of light emitting devices may include a first light emitting device that emits light of a certain wavelength within a band of 400 to 480 nm, a second light emitting device that emits light of a certain wavelength within a band of 550 to 610 nm, And a third light emitting element that emits light of an arbitrary wavelength.

Accordingly, the user can select one of the first light emitting device, the second light emitting device, and the third light emitting device, which constitute the light source 120, to operate, thereby improving the calming effect of the skin, It is possible to obtain effects such as calm care, skin contour improvement, skin elasticity improvement, skin elasticity restoration, skin lifting improvement and skin luster improvement through a single device.

However, the kind of the light source used in the skin care device 100 according to the present invention is not limited thereto, and it is revealed that an appropriate light source for generating a wavelength suitable for the skin improvement effect to be obtained can be used.

For example, the light emitting device may emit light in any of different wavelength bands selected within a band of 400 to 970 nm, and two different light emitting devices may emit light in a wavelength band in which some wavelength bands overlap each other .

In addition, the light source may be provided as one light emitting device for emitting light having a predetermined wavelength band within a band of 400 to 970 nm. In this case, the light source may suitably use two or more light sources that emit light of different wavelength bands.

In addition, the light source may be turned on continuously or turned on and off repeatedly.

In the case where the light source 120 includes a plurality of light emitting devices that emit light of different wavelength bands, the light emitting mode selection of the light source may be performed by operating the button unit 150 provided at one side of the case 110 Lt; / RTI >

2, the button unit 150 includes at least one button 152 exposed at one side of the case 110 and at least one button 152 disposed at the inside of the case 110, And a circuit unit 154 for generating a signal corresponding to the operation. The circuit unit 154 is electrically connected to a central control unit 180, which will be described later.

For example, the first light emitting mode, the second light emitting mode, and the third light emitting mode may be sequentially changed according to the number of times the button 152 is pressed by the user. However, it should be noted that the button 152 is not limited thereto, but may be a plurality of buttons matched one-to-one with the first, second, and third light emitting modes. In addition to the operation of selecting the light-emitting mode of the light source when the button unit 150 is operated, the on / off operation of the overall operation of the beauty apparatus may be performed.

The light source 120 is disposed inside the case 110 and disposed on the lower side of the transparent cover 140. At this time, the light source 120 may be arranged so that one side thereof contacts the transmissive cover 140 or may be spaced apart from the other side of the transmissive cover 140 at a predetermined interval. When the plurality of light sources 120 are provided, the plurality of light sources 120 may be spaced apart from each other by the same distance from the light-transmissive cover 140, and may be spaced apart from the light- It is possible.

For example, the light source 120 may be mounted on one side of the circuit board 122 spaced apart from the lower side of the transparent cover 140 (see FIGS. 4 and 6) It can be mounted in a predetermined pattern.

At this time, the light source 120 may be disposed directly below the area corresponding to the transparent cover 140. Accordingly, the skin care apparatus 100 according to the present invention is configured such that the light source 120 generating light is accommodated in the case 110 and separated from the transparent cover 140 at a predetermined interval The angle of emission of the light emitted to the outside is limited.

That is, the light emitted from the light source 120 is emitted through the translucent cover 140 disposed in the hollow portion of the seating surface 112 in a range narrower than the irradiation angle of the light source itself.

Accordingly, even if the light source 120 is operated in the state of being close to the skin of the user, particularly the face, the light generated from the light source 120 is emitted in a narrow range on the side of the skin requiring care, .

At this time, the cosmetic device 100 according to the present invention illuminates the light source 120 only when the distance between the light source 120 and the skin is within a predetermined range, and the distance between the light source 120 and the skin is preset The light source 120 may be turned off.

This prevents the user's eyes from being directly exposed to the light emitted from the light source 120 when the transparent cover 140 is inadvertently directed toward the user's eyes during the use process, This is to prevent it.

To this end, at least one proximity sensor 124 is provided on the circuit board 122 on which the light source 120 is mounted, thereby detecting the distance between the light source 120 and the skin, (See FIG. 4).

Here, the proximity sensors 124 may be provided in plural or may be disposed between the adjacent light sources 120, or may be disposed outside the light source 120 disposed at the outermost position.

In addition, the light source 120 may satisfy both the state where the pair of contact electrodes 130a and 130b are in contact with the user's skin and the case where the distance between the light source 120 and the skin is within a predetermined range Only initial lighting can be done.

This is because, even if the distance between the light source 120 and the skin is within a predetermined range in a process of moving to a body part to be cared by a user, So that the initial lighting can be performed in a state where it is finally moved to the precise position desired for the care. This makes it possible to prevent sudden operation regardless of the intention of the user.

 The pair of contact electrodes 130a and 130b are used to increase the skin permeation of the ionic drug by changing the electrical environment of the skin by generating a potential difference on the user's skin when the power is applied.

That is, the pair of contact electrodes 130a and 130b are used to realize the function of a known iontophoresis. By applying a DC current to a user's body by using a power source supplied through a battery 162, And the pair of contact electrodes 130a and 130b constitute a closed circuit, so that ion movement occurs.

For example, when cosmetics are applied to the skin of the user, direct current is applied to the pair of contact electrodes 130a and 130b to ionize the cosmetics applied to the skin of the user, the cosmetics easily pass through the skin mucosa, The effect of introducing ions into the substrate is generated.

The pair of contact electrodes 130a and 130b are disposed on the same surface of the case 110 as described above. That is, the skin care apparatus 100 according to the present invention is configured such that a pair of contact electrodes 130a and 130b for the iontophoresis function are spaced apart from each other on the seating surface 112 of the case 110, And is implemented in a fixed bi-polar manner.

Accordingly, when the upper part of the case 110 is brought into contact with the body part in a state where the user applies cosmetics to the body part to be cared, the pair of contact electrodes 130a, 130b are simultaneously in contact with the body part. Therefore, even if the user changes the gripping position of the case 110 during use, the pair of contact electrodes 130a and 130b are kept in contact with the skin, so that the iontophoresis function can be used.

The pair of contact electrodes 130a and 130b may be a plate-like member having a predetermined area to widen the contact area with the skin. The pair of contact electrodes 130a and 130b may be provided entirely along the seating surface 112, As shown in FIG.

The pair of contact electrodes 130a and 130b may include an extended portion 132 extending downward from the rim by a predetermined length and the edge formed by the rim of the extended portion 132 and the contact electrode It may be formed as a curved surface.

This is to prevent the skin of the user from being damaged by sharp edges when the pair of contact electrodes 130a and 130b are in contact with the user's skin and rubbing the user's skin.

The pair of contact electrodes 130a and 130b are electrically connected to each other via the elastic member 134 and the circuit board 122 on which the light source 120 is mounted so that the contact electrodes 130a and 130b are electrically connected to each other. The DC current supplied from the battery 162 can flow through the circuit board 122. Here, the elastic member 134 is made of a material having electrical conductivity and elastic force.

The elastic member 134 includes a first portion 134a mounted on the circuit board 122 and a second portion 134b inclined at a predetermined angle from the end of the first portion 134a And is disposed between the circuit board 122 and the contact electrodes 130a and 130b such that at least a portion of the second portion 134b contacts the lower surface of the contact electrodes 130a and 130b 7).

Accordingly, when the support frame 160 is inserted into the case 110 while the circuit board 122 is fixed to the support frame 160, the end cap 170 and the case 110 are coupled to each other The second portion 134b is kept in close contact with the respective contact electrodes 130a and 130b so that the circuit board 122 and the respective contact electrodes 130a and 130b are electrically connected to each other through the elastic member 134. [ do.

That is, in the skin care device 100 according to the present invention, the contact electrodes 130a and 130b and the circuit board 122 are electrically connected to each other through the elastic member 134, 130a, and 130b, it is possible to simplify the work process and improve the assemblability.

A through hole 113 of the elongated hole is formed on the seating surface 112 so that the second portion 134b of the elastic member 134 passes through the elongated hole so as to be in close contact with the respective contact electrodes 130a and 130b . In addition, although the elastic member 134 is shown in a linear shape in the drawing, the elastic member 134 is not limited thereto, and it may be provided to have a predetermined width to widen the contact area.

The translucent cover 140 protects the light source 120 from the external environment and protects the user's eyes from light emitted to the outside when the light source 120 is turned on. In addition, the transmissive cover 140 may perform a function of increasing the diffusibility of light generated in the light source 120 so that uniform light is emitted to the outside.

The transmissive cover 140 may be disposed on the front side of the light source 120 and may have a predetermined transmittance to reduce the intensity of light emitted from the light source 120 and emitted to the outside. And may include a light diffusing component so as to emit uniform light to the outside.

For example, the light transmissive cover 140 may have a transmittance of 70 to 90%, and a light diffusion PC having a transmittance of 70 to 90% may be used. The transmittance of the transparent cover 140 is 70 to 90%. However, the transmittance of the transparent cover 140 is not limited to 70% to 90%. It is noted that the transmittance of the transparent cover 140 can be appropriately adjusted if it can protect the eyes of the user and enhance the light diffusibility.

The upper surface of the transparent cover 140 is provided with a pair of protrusions formed at a predetermined depth from the upper surface so that the extension 132 extending downward from the rim of the contact electrodes 130a and 130b can be inserted. An insertion groove 142 may be formed.

When the translucent cover 140 is disposed on the hollow portion of the seating surface 112, the translucent cover 140 is disposed inside the case relatively to the pair of the contact electrodes 130a and 130b The pair of contact electrodes 130a and 130b protrude to the outside relative to the transparent cover 140 so that contact with the skin can be smoothly performed.

Meanwhile, the skin care apparatus 100 according to the present invention may include a support frame 160 inserted into the accommodation space of the case 110. The support frame 160 is for fixing the circuit board 122 on which the light source 120 is mounted.

The support frame 160 is made of a frame structure, and the circuit board 122 is detachably coupled to the upper side. In addition, a battery 162 for supplying power to the support frame 160, a circuit unit 154 for detecting the operation of the button 152, and the like are fixed. That is, all the components other than the transparent cover 140 and the contact electrodes 130a and 130b are coupled to the support frame 160 and the lower side is detachably coupled to the end cap 170. [

Accordingly, when the support frame 160, to which the battery 162, the circuit unit 154, and the circuit board 122 are all coupled, is inserted into the case 110 while being coupled with the end cap 170, Assembly can be completed.

The skin care apparatus 100 according to the present invention may be configured to change the light emitting mode of the light source, turn on / off the power source, turn on / off the light source, and information obtained by the proximity sensor 124 And a central control unit 180 for controlling overall driving. The central control unit 180 may be implemented in the form of a chipset mounted on one side of the circuit board 182 and may include a light source 120 Up table can be stored that can adjust the operating state and output strength of the contact electrodes 130a and 130b or the magnitude of the direct current applied to the contact electrodes 130a and 130b.

In addition, the skin care apparatus 100 according to the present invention may be provided with a notification unit interlocked with the operation of the button 152. The notification unit allows the user to easily recognize the operation of the button 152 by the user. For example, the notification unit may be a vibration motor 126 (see FIG. 4) coupled to one surface of the circuit board 122 through a holder 125 (see FIG. 4), and an acoustic output means Not shown).

That is, when the user presses the button 152, the central control device 180 recognizes the operation of the button 152 through the circuit part 154 disposed at the rear side of the button 152, The motor 126 generates vibration for a predetermined time or outputs sound to the outside. Accordingly, the user can easily change the desired mode by easily recognizing the on / off state of the power source and the change of the light emission mode of the light source through the operation of the button 152. [

Here, the output pattern of the notification unit may be output in a different pattern for each mode. For example, in the case of a vibration pattern generated by the vibration motor 126, at least one of the intensity of vibration and the duration of vibration at the time of selection and change to the first light emitting mode, the second light emitting mode, It is possible to output the sound in a different pattern, and when sound is outputted through the speaker, a sound unique to each mode can be outputted to the outside.

The skin care device 100 according to the present invention may include a pair of contact electrodes 130a and 130b and a translucent cover 140 exposed to the outside on the upper side of the case, And a cover 190 that is detachably coupled to the housing 110.

The skin care device 100 according to the present invention is provided with a charging terminal 164 which is exposed to one side of the case 110 to easily charge the battery 162 disposed inside the case 110 You may.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: Beauty Equipment
110: Case 112: Seat face
113: through hole 120: light source
122: circuit board 124: proximity sensor
125: Holder 126: Vibration motor
130a, 130b: contact electrode 132: extension
134: elastic member 134a: first part
134b: second part 140: translucent cover
142: insertion groove 150: button portion
152: Button 154:
160: Support frame 162: Battery
164: charging terminal 170: end cap
180: central control unit 190: cover

Claims (15)

case;
At least one light source disposed inside the case and capable of irradiating light of different wavelength bands;
A pair of contact electrodes which are disposed on the same surface of the case so as to simultaneously contact the skin of the user and generate a potential difference on the skin when power is applied to change the electrical environment of the skin; And
And a translucent cover disposed on a front side of the light source. The method according to claim 1,
Wherein the light source is formed integrally with a plurality of light emitting devices for emitting light of different wavelength bands. 3. The method of claim 2,
The plurality of light emitting devices may include a first light emitting device that emits light of a certain wavelength within a band of 400 to 480 nm, a second light emitting device that emits light of a certain wavelength within a band of 550 to 610 nm, And a third light emitting element for emitting light of a predetermined wavelength. The method according to claim 1,
The case includes a hollow seating surface extending inwardly along an upper rim,
Wherein the pair of contact electrodes are disposed on the seating surface, and the transparent cover is disposed on a hollow portion of the seating surface. 5. The method of claim 4,
Wherein the light source is disposed on a lower side of the translucent cover and light emitted to the outside from the light source is limited in the emission range of light emitted to the outside by at least one of the seating surface and the contact electrode. The method according to claim 1,
Wherein the contact electrode is provided with an extension extending downward from the rim by a predetermined length and the edge formed by the rim of the extension and the contact electrode is formed as a curved surface. The method according to claim 1,
And a sensor for sensing a distance between the light source and the skin,
Wherein the light source is illuminated when the distance sensed by the sensor is within a predetermined range and is turned off when the distance exceeds a predetermined range. 8. The method of claim 7,
Wherein the light source is turned on when the pair of contact electrodes are in contact with the user's skin and the distance between the light source and the skin is within a predetermined range. The method according to claim 1,
And a circuit board on which the light source is mounted, wherein the pair of contact electrodes are electrically connected to the circuit board through a pair of elastic members having electrical conductivity. 10. The method of claim 9,
The elastic member includes a first portion mounted on the circuit board and a second portion inclined at a predetermined angle from an end of the first portion, and a portion of the second portion is in contact with a lower surface of the contact electrode Skin beauty equipment. The method according to claim 1,
Wherein the transparent cover and the pair of contact electrodes are formed integrally with the case. 12. The method of claim 11,
Wherein the transparent cover has an insertion groove formed at a predetermined depth from an upper surface thereof so that an extension extending downward from the rim of the contact electrode to a predetermined length can be inserted. The method according to claim 1,
The skin care device includes a button unit for selecting on / off of a power source and a light emitting mode of the light source; And
And a vibration motor that generates vibration by interlocking with the operation of the button unit. The method according to claim 1,
Wherein the translucent cover has a transmittance of 70 to 90%. 5. The method of claim 4,
Wherein the seating surface includes an inclined surface having a predetermined inclination with respect to a horizontal plane, and a pair of contact electrodes are disposed on the inclined surface.

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