KR101290280B1 - Electrically operating toothbrush which cleans simultaneously the front and the rear of the teeth - Google Patents

Electrically operating toothbrush which cleans simultaneously the front and the rear of the teeth Download PDF

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Publication number
KR101290280B1
KR101290280B1 KR1020100135050A KR20100135050A KR101290280B1 KR 101290280 B1 KR101290280 B1 KR 101290280B1 KR 1020100135050 A KR1020100135050 A KR 1020100135050A KR 20100135050 A KR20100135050 A KR 20100135050A KR 101290280 B1 KR101290280 B1 KR 101290280B1
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KR
South Korea
Prior art keywords
cylindrical
shaft
power transmission
brush
cylindrical brush
Prior art date
Application number
KR1020100135050A
Other languages
Korean (ko)
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KR20120073061A (en
Inventor
서상일
서은혜
Original Assignee
서상일
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 서상일 filed Critical 서상일
Priority to KR1020100135050A priority Critical patent/KR101290280B1/en
Priority to PCT/KR2011/009510 priority patent/WO2012086955A1/en
Publication of KR20120073061A publication Critical patent/KR20120073061A/en
Application granted granted Critical
Publication of KR101290280B1 publication Critical patent/KR101290280B1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/349—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor with multiple brush bodies
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/0004—Additional brush head
    • A46B5/0012—Brushes with two or more heads on the same end of a handle for simultaneous use, e.g. cooperating with each-other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/24—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously
    • A61C17/26—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously driven by electric motor

Abstract

The present invention relates to an electric toothbrush for brushing teeth while rotating the brush by using electricity, comprising two cylindrical brushes rotated by a driving motor to simultaneously clean the front and rear surfaces of the tooth. By moving the brush's brush direction from top to bottom for upper teeth and from top to bottom for lower teeth, you can not only clean all corners of rugged teeth, but also reduce brushing time and reduce arm effort. It relates to an electric toothbrush that further improves the convenience of brushing teeth.
The electric toothbrush of the present invention has a handle 20 in which a drive motor 30 and a battery 31 are embedded, two cylindrical brushes 22 spaced apart from each other by a distance corresponding to a tooth thickness, and the drive motor ( 30 is coupled to the power transmission unit configured between the output shaft and the two cylindrical brushes 22, and the handle 20, the lower portion rotatably installed the two cylindrical brushes 22 at the tip In the powered toothbrush comprising a cylindrical brush mounting tool 21 having a cover 21a and a tip cover 21c formed therein, the cylindrical brush mounting tool 21 has an annular insertion protrusion 21b formed at an end thereof. And by the annular insertion groove (23a) formed in the small diameter portion 23 of the front end of the handle 20, it can be separated from the handle 20, the front cover (21c) of the cylindrical brush installation port 21 ), The central axis of the cylindrical brush 22 A shaft groove 21ca is formed to be inserted into the mold, and a central blocking plate 21d for preventing toothpaste bubbles from flowing into the inside and side through-pipes 21e on both sides through which the shaft of the power transmission device passes. Formed; The power transmission device is connected to the shaft of the drive motor 30, and the extension shaft 32 is formed in the cylindrical brush installation port 21, the extension shaft 32 is formed with a power transmission protrusion (32a) at the output end; An input shaft 40 having a power transmission groove 40a coupled to the power transmission protrusion 32a of the 32 is formed, and the power output from the input shaft 40 is divided into two cylindrical brushes 22 for transmission. A power split means; The power splitting means is configured inside the cylindrical brush fitting 21 which is shielded by the center blocking plate 21d and the side through pipe 21e, and is provided in front of the input shaft 40. 41, two driven shafts 42 engaged with the drive gear 41, two flexible shafts 43a and 43b respectively connected to the drive gear 41 and the driven gear 42, and the two; The flexible shafts 43a and 43b are connected to each other and installed at the rear of the two cylindrical brushes 22 to include a gear train for rotating the central axis of the cylindrical brush 22.

Description

Electrically operating toothbrush which cleans simultaneously the front and the rear of the teeth}

The present invention relates to an electric toothbrush for brushing teeth while rotating the brush using electricity, and more particularly, it is possible to simultaneously clean the front and rear surfaces of the tooth by providing two cylindrical brushes rotated by a drive motor. At the same time, the brush movement direction is moved from top to bottom for upper teeth and from top to bottom for lower teeth, which not only cleans every corner of rugged teeth, but also shortens brushing time and It relates to an electric toothbrush that further improves the convenience of brushing teeth, such as less effort.

Electric toothbrushes are toothbrushes that rotate or vibrate with an electric force to clean teeth. Originally developed for use by people who cannot use their hands well, such as disabled people and children, it is also used by the general public because of the convenience of not having to use a lot of hands.

In general, the toothbrush moves in order to brush the upper teeth from the top to the bottom, and the lower teeth from the bottom to the top, so that every corner of the tooth can be wiped clean and the gums are healthy. However, the conventional electric toothbrush has a problem that can be wiped every corner of the tooth because the brush is to rotate in the tooth surface irrespective of the direction of the tooth.

In order to solve this problem, as shown in Figure 1, the handle 10, the motor and the battery is built in the interior, as the coupling is coupled to the handle 10, a cylindrical brush mounting hole formed with a lower cover (11a) at the tip ( 11) Patented to develop an electric toothbrush that is rotatably installed on the lower cover (11a) of the cylindrical brush mounting hole 11 and includes a cylindrical brush (12) driven by a motor installed inside the handle (10) An application is disclosed (Patent Publication No.:10-2010-0018117).

The electric toothbrush puts the battery inside through the cover 10b of the handle 10 and turns on / off the switch 10a so that the driving motor inside is driven to rotate the cylindrical brush 12. It is.

The electric toothbrush is a cylindrical brush for cleaning the teeth 12 rotates from above to below or below to the direction of the teeth, so as to clean not only the protruding inner or outer surfaces of the teeth, but also the gap between the teeth and the teeth. It has an effect.

However, the electric toothbrush of the above-described application has a problem in that it takes a lot of time to brush the teeth and takes a lot of arm strength because it needs to clean the front and rear of the tooth separately.

Modern people are living in busy daily life, and especially in the morning, because of the tendency to run out of time due to commute or school time, the reduction of brushing time is convenient for modern people.

The present invention has been made to solve the problems of the conventional electric toothbrush as described above, the present invention allows the cylindrical brush to clean the front and rear of the teeth at the same time to shorten the brushing time and accordingly less arm force The purpose of the present invention is to provide an electric toothbrush that further improves the convenience and safety of brushing teeth and maintains cleanliness of the interior.

Electric toothbrush of the present invention for achieving the above object is a handle in which the drive motor and the battery is built, two cylindrical brushes spaced apart from each other by a distance corresponding to the thickness of the tooth, the output shaft of the drive motor and the two cylindrical A power transmission device configured between the brushes and the electric toothbrush, which is coupled to the handle, and includes a cylindrical cover for installing a lower cover and a tip cover for rotatably installing the two cylindrical brushes at the tip. The cylindrical brush mounting tool is separated from the handle by an annular insertion protrusion formed at an end portion of the cylindrical brush and an annular insertion groove formed at a small diameter portion of the tip portion of the handle. Shaft groove is formed so that the central axis of the Air, and toothpaste foam is the central block for preventing flowing into the plate, and is composed with a tube side clearance to both sides of the through shaft of the power transmission system is formed; The power transmission device is connected to the shaft of the drive motor, the extension shaft is formed in the output end, the power transmission projection is formed in the cylindrical brush installation, the power transmission groove is coupled to the power transmission projection of the extension shaft is formed. An input shaft, and power dividing means for dividing and transmitting power output from the input shaft into two cylindrical brushes; The power dividing means is configured inside the cylindrical brush mounting hole shielded by a central blocking plate and a side through pipe, and includes a drive gear provided in front of the input shaft, a driven gear engaged with the drive gear, and the drive gear. And two flexible shafts, each connected to a driven gear, and a gear train to which the two flexible shafts are respectively connected and installed at the rear of the two cylindrical brushes to rotate the cylindrical brushes. Characterized in that.

The powered toothbrush of the present invention is also characterized in that the two cylindrical brushes of the power train are adapted to rotate in opposite directions.

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The electric toothbrush according to the present invention can cleanly clean even the gap between the protruding portions of the teeth by rotating the cylindrical brush in direct contact with the teeth and rotating from above to below or below to the direction of the teeth. Since the cylindrical brush cleans the front and back of the teeth at the same time, the time required to brush teeth is cut in half, thus reducing the effort to brush the teeth, improving the convenience of use and keeping the teeth cleaner and healthier. Exert.
The present invention also prevents damage to the body by the lower cover and the front cover, and prevents the toothpaste bubbles from flowing into the interior by the side through-pipes on both sides through which the central blocking plate and the shaft of the power transmission device penetrate. It can keep clean, and it can prevent the damage to the body by the shaft of power transmission device.

1 is a perspective view of an electric toothbrush having a conventional cylindrical brush,
2 is a perspective view of an electric toothbrush having two cylindrical brushes in accordance with the present invention;
3 is a cross-sectional plan view of the electric toothbrush of FIG.
Figure 4 is a longitudinal cross-sectional view of the electric toothbrush of Figure 2,
5 is an exploded perspective view of the electric toothbrush according to the present invention;
6 is an exploded longitudinal sectional view of the electric toothbrush according to the present invention;
7 is an enlarged cross-sectional view of the cylindrical brush of the electric toothbrush of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figures 2 to 4, the electric toothbrush of the present invention is provided with two cylindrical brushes 22 to simultaneously clean the front and rear of the teeth, the drive motor 30 and the battery 31 therein ) Is a built-in handle 20, a cylindrical brush mounting portion 21, which is coupled to the handle 20, the lower cover 21a is formed at the tip, the lower cover 21a of the cylindrical brush mounting portion 21 It is rotatably installed at and includes two cylindrical brushes 22 driven by a drive motor 30 installed inside the handle 20.

As shown in FIGS. 2 and 5, the front cover 21c and the lower cover 21a of the cylindrical brush fitting 21 are formed so that the brush of the cylindrical brush 22 protrudes outward at least 180 °. . The tip cover 21c is formed with a shaft groove 21ca into which the central axis of the cylindrical brush 22 is rotatably inserted.

As shown in FIG. 1, the cylindrical brush mounting holes 21 are provided with a central blocking plate 21d and side lateral through-pipes 21e, which are intended to prevent the toothpaste from flowing into the interior. The center blocking plate 21d blocks in the lateral direction, and the flexible shafts 43a and 43b and the gear train are arranged inside the side through-pipes 21e on both sides.

The two cylindrical brushes 22 are rotatably installed on the lower cover 21a of the cylindrical brush fitting 21, and the two cylindrical brushes 22 are spaced apart from each other by an interval corresponding to the tooth thickness. It is designed to rotate in opposite directions. Thus, the two cylindrical brushes 22 clean the teeth while descending from the top down or up from the bottom, respectively, at the front and rear of the tooth.

As shown in FIG. 7, the direction of the brush implanted in the cylindrical brush 22 is radially formed in the direction perpendicular to the axis. . This is because the teeth are different in thickness of the incisor, the canine, the middle tooth, and the molars, so that the thin incisor is cleaned with a long brush and the thick molars are cleaned with a short brush.

Between the output shaft of the drive motor 30 and the two cylindrical brushes 22 is configured a power transmission device for transmitting power divided into two.

In the power transmission device, two cylindrical brushes 22 are rotated in opposite directions. The power transmission device is configured in the handle 20 and is connected to the shaft of the drive motor 30. A power transmission protrusion 32a is formed at the output end. The input shaft 40 is provided in the extension shaft 32, the cylindrical brush installation port 21, the power transmission groove 40a is coupled to the power transmission protrusion 32a of the extension shaft 32. And, the power output from the input shaft 40 is composed of a power split means for dividing and transmitting to the central axis of the two cylindrical brushes (22).

5 and 6, the extension shaft 32 and the input shaft 40 is separable from each other and the power transmission protrusion 32a of the extension shaft 32 to be coupled to transfer the rotational force is It is formed crosswise, and the power transmission groove 40a of the input shaft 40 is also formed crosswise. However, the shape of the power transmission protrusion 32a and the power transmission groove 40a is only one embodiment, and may be modified into a triangle, a square, a pentagon, a hexagonal cross section, and the like.

The power splitting means is provided at a drive gear 41 provided in front of the input shaft 40, a driven gear 42 engaged with the drive gear 41, the drive gear 41 and a driven gear 42, respectively. The two flexible shafts 43a and 43b connected to each other, and the two flexible shafts 43a and 43b are connected to each other and are installed at the rear of the two cylindrical brushes 22 to respectively form the cylindrical brushes 22. It consists of a gear train to rotate.

As illustrated, the flexible shafts 43a and 43b may use a coil spring embedded inside the vinyl tube, or may use various types of wires, such as wires made of thin strands of wire.

The gear train is engaged with the first gear 45 and the first gear 45 provided on the two flexible shafts 43a and 43b, respectively, and the second gear 46 provided on the output shaft 44. Consists of The output shaft 44 is rotatably installed on the front wall of the above-described side through pipe 21d, and a power transmission groove 44a is formed at the front end thereof, and a power transmission is provided at the central axis of the cylindrical brush 22 engaged with the output shaft 44. The protrusion 22a is formed.

The power splitting means may be configured differently as necessary. For example, although not shown, one flexible shaft is connected to the input shaft 40, and one central gear is installed on the output shaft of the flexible shaft, and the two cylindrical brushes 22 can rotate in opposite directions by being engaged with the central gear. It can also be configured as a gear train.

As described above, the extension shaft 32 is configured in the handle 20, the power transmission device is configured in the cylindrical brush installation 21, the handle 20 and the cylindrical brush installation 21 is easy to each other It is detachable.

To this end, a small diameter portion 23 is formed at the tip of the handle 20, and an annular insertion groove 23a is formed in the small diameter portion 23, and the end portion of the cylindrical brush fixture jig 21 is formed. The inner diameter allows the small diameter portion 23 to be inserted and forms an annular insertion protrusion 21b that snaps into the insertion groove 23a and snaps.

At the end of the handle 20, the cover 20b is configured to be openable. The coupling method of the cover 20b may be various, such as screw coupling method, snack coupling method.

In addition, the handle 20 is configured with an on / off switch 20a as in the prior art. The drive motor 30 is a motor capable of forward and reverse rotation. The on / off switch 20a can control forward rotation, reverse rotation, and stop of the drive motor 30. And it can be made to control the rotational speed of the motor 30.

The storage battery 31 uses a rechargeable battery and for this purpose, the charging terminal 33 is configured in the cover 20b. The charging circuit between the storage battery 31 and the charging terminal 33 is not shown.

In addition, the driving gear 41, the driven gear 42, the first gear 45 and the second gear 46 are all rotatably supported by the bearing b.

The vibrating toothbrush of the present invention configured as described above acts as follows.

Toothpaste is applied to the cylindrical brush 22 to operate the on / off switch 20a of the handle 20 so that the drive motor 30 is rotated in the forward direction in either direction while the tooth is between the two cylindrical brushes 22. Locate it.

When the drive motor 30 is operated, the extension shaft 32 rotates in the same direction as the motor shaft, and at the same time, the drive gear 41 and the driven gear 42 installed on the input shaft 40 rotate in opposite directions, respectively. . Then, the two flexible shafts 43a and 43b rotate in opposite directions, respectively, and sequentially rotate the output shaft 44, the first gear 45 and the second gear 46, and finally rotate the cylindrical brush 22 to each other. Rotate in the opposite direction.

At this time, the brush of the cylindrical brush 22 cleans the front and rear surfaces of the teeth at the same time while moving from the top to the bottom or from the bottom in the same direction as the teeth.

When the rotation direction of the cylindrical brush 22 is to be changed and cleaned, the on / off switch 20a may be operated to reverse the rotation of the drive motor 30.

Each time you clean the front of the left tooth, the front of the right tooth, the back of the left tooth, and the back of the right tooth, the direction of rotation of the cylindrical brush 22 is changed.When cleaning the upper teeth, the brush of the brush moves from top to bottom, When cleaning the lower teeth, brush your teeth while moving from the bottom up.

The tip cover 21c and the lower cover 21a of the cylindrical brush fitting 21 serve to protect the inside of the lips, the tongue, the mouth, and the like that do not require cleaning from the brush brush. Therefore, the cylindrical brush 22 can clean only the tooth part which needs cleaning.

When the cylindrical brush 22 is replaced with a new one, when the cylindrical brush fitting 21 is pulled out and snapped to the handle 20, the input shaft 40 and the handle of the cylindrical brush fitting 21 are automatically removed. The extension shaft 32 of 20 is separated.

And while inserting the power transmission projection (32a) of the extension shaft 32 of the handle 20 to the power transmission groove (40a) of the input shaft 40 of the new cylindrical brush installation tool 21, the cylindrical brush installation tool (21) The insertion protrusion 20b of the) and the insertion groove 23a of the small diameter portion 23 of the handle 20 are snapped together. Thus, since the cylindrical brush 22 can be replaced with a new one, the electric toothbrush of the present invention can be used for a long time.

The space between the side through-pipes 21e on both sides and the space between the front cover 21c on both sides can be convenient when brushing teeth because teeth near the teeth that are cleaned with the cylindrical brush 22 can enter when brushing teeth. .

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made within the spirit and scope of the present invention, and such changes or modifications are to the accompanying patents. It will have to belong to the claims.

b: bearing
10 knob 10a on / off switch
10b: cover 11: cylindrical brush fitting
11a: lower cover 12: cylindrical brush
20: handle 20a: on / off switch
20b: cover 21: cylindrical brush fitting
21a: Lower cover 21b: Insertion protrusion
21c: Tip cover 21ca: Shaft groove
21d: Center Block 21e: Side Through Tube
22: cylindrical brush 22a: power transmission protrusion
23: small diameter 23a: insertion groove
30: drive motor 31: storage battery
32: extension shaft 32a: power transmission protrusion
33: charging terminal 40: input shaft
40a: power transmission groove 41: drive gear
42: driven gear 43a, 43b: flexible shaft
44: output shaft 44a: power transmission groove
45: first gear 46: second gear

Claims (4)

The handle 20 in which the drive motor 30 and the battery 31 are embedded therein, two cylindrical brushes 22 spaced apart from each other by an interval corresponding to the thickness of the tooth, the output shaft of the drive motor 30 and the The lower cover 21a and the tip, which are coupled to the power transmission device configured between the two cylindrical brushes 22 and the handle 20, rotatably installed the two cylindrical brushes 22 at the tip. In the electric toothbrush comprising a cylindrical brush mounting tool 21, the cover 21c is formed,
The cylindrical brush fitting 21 is formed by an annular insertion protrusion 21b formed at an end portion thereof and an annular insertion groove 23a formed at a small diameter portion 23 of the tip portion of the handle 20. In the front cover 21c of the cylindrical brush installation port 21, a shaft groove 21ca is formed in which the central axis of the cylindrical brush 22 is rotatably inserted, and the toothpaste foam is formed therein. A central blocking plate 21d for preventing the flow of water into the furnace and side lateral through-pipes 21e through which the shaft of the power transmission device penetrates is formed;
The power transmission device is connected to the shaft of the drive motor 30, and the extension shaft 32 is formed in the cylindrical brush installation port 21, the extension shaft 32 is formed with a power transmission protrusion (32a) at the output end; An input shaft 40 having a power transmission groove 40a coupled to the power transmission protrusion 32a of the 32 is formed, and the power output from the input shaft 40 is divided into two cylindrical brushes 22 for transmission. A power split means;
The power splitting means is configured inside the cylindrical brush fitting 21 which is shielded by the center blocking plate 21d and the side through pipe 21e, and is provided in front of the input shaft 40. 41, two driven shafts 42 engaged with the drive gear 41, two flexible shafts 43a and 43b respectively connected to the drive gear 41 and the driven gear 42, and the two; The flexible shafts 43a and 43b are connected to each other and are installed at the rear of the two cylindrical brushes 22, and the front and rear surfaces of the tooth, characterized in that it comprises a gear train for rotating the central axis of the cylindrical brush 22. Electric toothbrush to clean at the same time. 2. The powered toothbrush of claim 1, wherein the power train is configured to rotate two cylindrical brushes (22) in opposite directions. delete delete
KR1020100135050A 2010-12-24 2010-12-24 Electrically operating toothbrush which cleans simultaneously the front and the rear of the teeth KR101290280B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020100135050A KR101290280B1 (en) 2010-12-24 2010-12-24 Electrically operating toothbrush which cleans simultaneously the front and the rear of the teeth
PCT/KR2011/009510 WO2012086955A1 (en) 2010-12-24 2011-12-09 Electric toothbrush simultaneously cleaning front and back surfaces of teeth

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100135050A KR101290280B1 (en) 2010-12-24 2010-12-24 Electrically operating toothbrush which cleans simultaneously the front and the rear of the teeth

Publications (2)

Publication Number Publication Date
KR20120073061A KR20120073061A (en) 2012-07-04
KR101290280B1 true KR101290280B1 (en) 2013-07-26

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WO (1) WO2012086955A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104323867A (en) * 2014-11-13 2015-02-04 张平洲 Tooth cleaning device
CN106137436A (en) * 2015-04-28 2016-11-23 刘小龙 Electronic biaxial parallel rotary toothbrush
CN112425888A (en) * 2020-11-18 2021-03-02 张�林 Three-brush linkage-rotation type toothbrush head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020071834A (en) * 2002-08-26 2002-09-13 최해림 Automatic cleaning apparatus for teeth
KR200419528Y1 (en) 2006-04-13 2006-06-21 정지철 Electric toothbrush
KR20100121919A (en) * 2009-05-11 2010-11-19 김용성 Power toothbrush

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030140437A1 (en) * 2002-01-31 2003-07-31 Eyal Eliav Powered toothbrush
KR20060011093A (en) * 2004-07-29 2006-02-03 한국훼스트크린 주식회사 Electric toothbrush

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020071834A (en) * 2002-08-26 2002-09-13 최해림 Automatic cleaning apparatus for teeth
KR200419528Y1 (en) 2006-04-13 2006-06-21 정지철 Electric toothbrush
KR20100121919A (en) * 2009-05-11 2010-11-19 김용성 Power toothbrush

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WO2012086955A1 (en) 2012-06-28
KR20120073061A (en) 2012-07-04

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