阅读说明：本技术 电动牙刷 (Electric tooth brush ) 是由 金英旭 于 2020-08-25 设计创作，主要内容包括：本发明涉及电动牙刷,上述电动牙刷包括：头部；以及手柄部,呈能够与上述头部相结合的形态,根据使用人员的控制向上述头部供给驱动电压,上述头部包括：牙刷头部,配置有牙刷毛及相互隔开的第一电极及第二电极；头部本体,从上述牙刷头部延伸；第一连接线及第二连接线,配置于上述头部本体的内部,在上述牙刷头部的内部分别与上述第一电极及上述第二电极相连接；头部盖,用于封闭上述头部本体的末端部；以及第一连接销及第二连接销,分别与上述第一连接线及上述第二连接线相连接,一部分通过上述头部盖向外部露出。(The present invention relates to an electric toothbrush comprising: a head portion; and a handle section which is configured to be coupled to the head section and supplies a driving voltage to the head section in accordance with a control of a user, the head section including: a toothbrush head configured with bristles and first and second electrodes spaced apart from each other; a head body extending from the toothbrush head; a first connection line and a second connection line disposed inside the head body and connected to the first electrode and the second electrode, respectively, inside the toothbrush head; a head cover for closing a distal end portion of the head body; and a first connecting pin and a second connecting pin connected to the first connecting wire and the second connecting wire, respectively, and partially exposed to the outside through the head cover.)

1. An electric toothbrush is characterized in that a toothbrush head is provided,

the method comprises the following steps:

a head portion; and

a handle part which is connected with the head part and supplies driving voltage to the head part according to the control of a user,

the head portion includes:

a toothbrush head configured with bristles and first and second electrodes spaced apart from each other;

a head body extending from the toothbrush head;

a first connection line and a second connection line disposed inside the head body and connected to the first electrode and the second electrode, respectively, inside the toothbrush head;

a head cover for closing a distal end portion of the head body; and

and a first connecting pin and a second connecting pin connected to the first connecting wire and the second connecting wire, respectively, and partially exposed to the outside through the head cover.

2. The electric toothbrush of claim 1, wherein said head cover comprises:

a column part in which a fixing pin accommodating groove is formed; and

the first placing area and the second placing area are positioned on two sides of the column part.

3. The electric toothbrush according to claim 2,

a first pin hole for passing the first connecting pin is formed in the first placement region,

a second pin hole for passing the second connecting pin is formed in the second placing region,

the terminal portion of the first connection line and the terminal portion of the second connection line are respectively placed in the first placement region and the second placement region in a bent state.

4. The electric toothbrush according to claim 3, wherein at least one protrusion is disposed around each of the first placement region and the second placement region.

5. The electric toothbrush according to claim 3, wherein the distal end portion of the first connecting wire and the distal end portion of the second connecting wire are bent in opposite directions.

6. The electric toothbrush according to claim 5,

a first connection hole corresponding to the first pin hole is formed at a distal end portion of the first connection wire,

a second connection hole corresponding to the second pin hole is formed at a distal end portion of the second connection line.

7. The electric toothbrush according to claim 3, wherein the first guide groove and the second guide groove for guiding the first connection wire and the second connection wire are formed to be long in a longitudinal direction in the column portion.

8. The electric toothbrush according to claim 1, wherein the first electrode and the second electrode have a height of 0.1mm to 3mm with respect to the toothbrush head.

9. The powered toothbrush as defined in claim 1, wherein said handle portion includes:

a battery;

a switch for controlling the power supply based on the battery;

a vibration motor;

a circuit unit for generating a drive voltage using a voltage of the battery;

a first connection terminal and a second connection terminal which are respectively in contact with the first connection pin and the second connection pin when the head portion is coupled to the handle portion in order to transmit the driving voltage generated in the circuit portion to the head portion; and

and a fixing pin protruding for fixing and combining with the head.

10. The electric toothbrush according to claim 9, wherein the frequency of the driving voltage generated by the circuit unit is set to 1KHz to 1000 MHz.

11. The electric toothbrush according to claim 10, wherein the circuit section comprises:

a DC-DC converter for receiving the voltage of the battery;

a signal generating unit for generating a driving voltage using an output voltage of the dc-dc converter;

a filter for performing a filtering operation on the driving voltage generated by the signal generating unit; and

and a calibration unit for performing voltage calibration on the driving voltage supplied from the filter and outputting the driving voltage.

12. The powered toothbrush as defined in claim 9, wherein said handle portion further comprises:

an inner case including a battery housing portion for housing the battery, a vibration motor housing portion for housing the vibration motor, and a coupling portion for housing the first connection terminal, the second connection terminal, and the fixing pin; and

and a circuit board mounted with the circuit part, positioned between the switch and the vibration motor, and fixedly arranged on the inner shell.

13. The powered toothbrush of claim 12, further comprising:

an upper cover made of insulating material and arranged on the combining part of the inner shell;

an outer case for accommodating the inner case and having a switch pressing region corresponding to the switch; and

and a battery cover coupled to one end of the outer case to close the battery receiving part.

14. The powered toothbrush of claim 1, wherein the drive voltage is a superposition of an ac voltage having an amplitude of a volts (V) and a dc voltage having a magnitude of B volts (V).

15. The electric toothbrush according to claim 14, wherein the ratio of A to B is 1:0.5 to 1: 10.

Technical Field

The present invention relates to an electric toothbrush, and more particularly, to an electric toothbrush which can effectively remove dental plaque.

Background

Dental plaque (dental plaque) is a viscous transparent film formed by adhering to the surface of teeth, and is formed by mutually adhering a plurality of bacteria living in the mouth and specific components in saliva, and is formed on the periphery of teeth, oral prostheses, correction devices and false teeth.

If plaque is formed in the form of a very thin and transparent film, bacteria inside will multiply, and bacteria in the plaque will exponentially grow and become more abundant by the sugar supplied when food is ingested. The acidic material formed by the bacteria in the plaque melts the lime component of the tooth, causing tooth decay and toxins that cause inflammation of the gums.

Dental plaque is not noticeable to the naked eye and is formed in large quantities, mainly in the deep bones of the teeth, in narrow gaps between teeth and gums. In such a narrow space, influence is exerted on teeth and peripheral tissues, and thus, it is very important to remove dental plaque at each corner, which is difficult to effectively remove using only the existing toothbrush.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide an electric toothbrush which can effectively remove dental plaque.

Another object of the present invention is to provide an electric toothbrush which can prevent the occurrence of dental caries and periodontal disease by removing dental plaque.

An electric toothbrush according to an embodiment of the present invention may include: a head portion; and a handle section which is configured to be coupled to the head section and supplies a driving voltage to the head section in accordance with a control of a user, the head section including: a toothbrush head configured with bristles and first and second electrodes spaced apart from each other; a head body extending from the toothbrush head; a first connection line and a second connection line disposed inside the head body and connected to the first electrode and the second electrode, respectively, inside the toothbrush head; a head cover for closing a distal end portion of the head body; and a first connecting pin and a second connecting pin connected to the first connecting wire and the second connecting wire, respectively, and partially exposed to the outside through the head cover.

Also, the head cover may include: a column part in which a fixing pin accommodating groove is formed; and a first placement region and a second placement region located on both sides of the pillar portion.

In addition, a first pin hole through which the first connecting pin passes may be formed in the first receiving area, a second pin hole through which the second connecting pin passes may be formed in the second receiving area, and the distal end portion of the first connecting wire and the distal end portion of the second connecting wire may be received in the first receiving area and the second receiving area, respectively, in a bent state.

At least one protrusion may be disposed around each of the first placement region and the second placement region.

And, the terminal portion of the first connection line and the terminal portion of the second connection line may be bent in opposite directions.

Further, a first connection hole corresponding to the first pin hole may be formed at a distal end portion of the first connection wire, and a second connection hole corresponding to the second pin hole may be formed at a distal end portion of the second connection wire.

In the column portion, a first guide groove and a second guide groove for guiding the first connection wire and the second connection wire may be formed to be long in a longitudinal direction, respectively.

The first electrode and the second electrode may have a height of 0.1mm to 3mm with respect to the toothbrush head.

Further, the handle portion may include: a battery; a switch for controlling the power supply based on the battery; a vibration motor; a circuit unit for generating a drive voltage using a voltage of the battery; a first connection terminal and a second connection terminal which are respectively in contact with the first connection pin and the second connection pin when the head portion is coupled to the handle portion in order to transmit the driving voltage generated in the circuit portion to the head portion; and a fixing pin protruding for fixing and combining with the head.

The frequency of the driving voltage generated by the circuit unit may be set to 1KHz to 1000 MHz.

Further, the circuit section may include: a direct current-direct current (DC-DC) converter for receiving the voltage of the battery; a signal generating unit for generating a driving voltage using an output voltage of the dc-dc converter; a filter for performing a filtering operation on the driving voltage generated by the signal generating unit; and a calibration unit that performs voltage calibration on the drive voltage supplied from the filter and outputs the drive voltage.

Further, the handle portion may further include: an inner case including a battery housing portion for housing the battery, a vibration motor housing portion for housing the vibration motor, and a coupling portion for housing the first connection terminal, the second connection terminal, and the fixing pin; and a circuit board, which is provided with the circuit part, is positioned between the switch and the vibration motor, and is fixedly arranged in the inner shell.

Further, the present invention may further include: an upper cover made of insulating material and arranged on the combining part of the inner shell; an outer case for accommodating the inner case and having a switch pressing region corresponding to the switch; and a battery cover coupled to one end of the outer case to close the battery receiving part.

The driving voltage may be a superposition of an ac voltage having an amplitude of a volts and a dc voltage having a amplitude of B volts.

The ratio of A to B may be 1:0.5 to 1: 10.

According to the present invention as described above, the present invention can provide an electric toothbrush which effectively removes dental plaque.

Further, according to the present invention, there is provided an electric toothbrush which prevents the occurrence of dental caries and periodontal disease by removing dental plaque.

Drawings

Fig. 1 is a view showing an electric toothbrush according to an embodiment of the present invention.

Fig. 2 is a view illustrating a state where the electric toothbrush shown in fig. 1 is separated.

Fig. 3 is a diagram showing a head portion of an embodiment of the present invention.

Fig. 4a to 4c are views illustrating a head cover according to an embodiment of the present invention.

Fig. 5a to 5b are views showing a coupling relationship of the head cover, the connection wire, and the connection pin according to the embodiment of the present invention.

Fig. 6 is a diagram for explaining the height of the electrode of the embodiment of the present invention.

Fig. 7a is an exploded view showing an internal structure of a handle portion according to an embodiment of the present invention, fig. 7b is a view showing a state where the components shown in fig. 7a are coupled, and fig. 7c is a view showing a fixing pin, a connecting terminal, and the like according to an embodiment of the present invention.

Fig. 8 is a view showing a coupling relationship of the battery cover, the inner case, and the outer case according to the embodiment of the present invention.

Fig. 9 is a view showing a section of a portion of an electric toothbrush when a head is combined with a handle part according to an embodiment of the present invention.

Fig. 10 is a diagram showing a circuit section of an embodiment of the present invention.

Fig. 11a to 11c are diagrams for explaining the driving voltages according to the embodiment of the present invention.

Fig. 12a to 12e are diagrams showing the arrangement structure of electrodes according to another embodiment of the present invention.

Fig. 13a and 13b are views showing the layout of the connecting wires and electrodes according to another embodiment of the present invention.

Detailed Description

Hereinafter, examples related to the present invention are illustrated in the drawings and specifically described by detailed description. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in many different forms including all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention.

In describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. Such terms are used only to distinguish two kinds of structural elements, and the nature, order or sequence of the corresponding structural elements is not limited to the above terms. In the present specification, when one component is "connected", "coupled" or "coupled" to another component, one component may be directly connected or coupled to the other component, or the other component may be "connected", "coupled" or "coupled" between the components. In the case of "connection", "combination", or "coupling", it may be physically "connected", "combined", or "coupled", or may be electrically "connected", "combined", or "coupled", as necessary.

Hereinafter, an electric toothbrush according to an embodiment of the present invention will be described with reference to the drawings related to the embodiment of the present invention.

Fig. 1 is a view illustrating an electric toothbrush according to an embodiment of the present invention, and fig. 2 is a view illustrating a state where the electric toothbrush shown in fig. 1 is separated.

Referring to fig. 1 and 2, an electric toothbrush 1 according to an embodiment of the present invention may include a head portion 100 and a handle portion 200.

The head 100 may include a toothbrush head 110 and a head body 130, and may be designed to be coupled to and separated from the handle part 200.

Thus, in the case where the replacement of the head 100 is required due to aging or the like, a user can easily replace the existing head 100 with a new head 100.

The bristles 111, the first electrode 121, and the second electrode 122 may be disposed on the brush head 110.

The bristles 111 may be inserted into and fixed to a plurality of implant holes 112 formed on the surface of the brush head 110. The arrangement, number, size, etc. of the bristles 111 are not particularly limited and may be changed into various forms.

The first electrode 121 and the second electrode 122 may be disposed on the surface of the toothbrush head 110 in a spaced state, and may be disposed on the same surface as the bristles 111.

The first electrode 121 and the second electrode 122 can form an electromagnetic field based on the electric energy supplied from the handle portion 200. The electromagnetic field can weaken the structure of dental plaque, and thus, a user can effectively remove dental plaque in the oral cavity using the electric toothbrush 1.

The head body 130 may extend from the toothbrush head 110 to form the body of the head 100. The head body 130 may be designed to have a length suitable for use, and a distal end portion of the head body 130 may be combined with the handle portion 200.

The handle portion 200 is a body of the electric toothbrush 1, and may be designed to be held by a user when used.

Also, the handle part 200 may be combined with the head part 100, and may include an additional fixing pin 220 for fixedly combining with the head part 100.

The handle portion 200 may house a battery 310 (see fig. 7b) for supplying power, and the handle portion 200 may be provided with an additional battery cover 215 for replacing the battery 310 and the like.

The handle portion 200 may include an outer case 210 for receiving and protecting internal components, and a switch pressing region 211 and a non-slip portion 212 may be formed corresponding to the outer case 210.

The switch pressing area 211 is formed at a position corresponding to the switch 330 (see fig. 7a) disposed inside, and a user can control the on/off of the internal switch 330 by pressing the switch pressing area 211.

When a user rinses, the power of the electric toothbrush 1 may be turned on by pressing the switch pressing region 211, whereby the driving voltage generated from the handle part 200 supplies and generates an electromagnetic field for removing dental plaque to the first electrode 121 and/or the second electrode 122 of the head part 100.

The anti-slip portion 212 is used to provide a stable grip to a user, and may be designed to have a structure and material for increasing a frictional force. As an example, cleats 212 may include a plurality of grooves.

Fig. 3 is a view illustrating a head part of an embodiment of the present invention, and fig. 4a to 4c are views illustrating a head cover of an embodiment of the present invention. Fig. 5a to 5b are views showing a coupling relationship between the head cover, the connection wire, and the connection pin according to the embodiment of the present invention, and fig. 6 is a view for explaining a height of the electrode according to the embodiment of the present invention.

In particular, fig. 4a shows the shape of the head cover 140 viewed from the upper side, fig. 4b shows the shape of the head cover 140 viewed from the lower side, and fig. 4c shows a cross section of the head cover 140.

Referring to fig. 3, the head 100 according to an embodiment of the present invention may include a first electrode 121, a second electrode 122, a toothbrush head 110, a head body 130, a first connection line 131, a second connection line 132, a head cover 140, a first connection pin 151, and a second connection pin 152.

The first electrode 121 and the second electrode 122 may be disposed on the brush head 110, and the first electrode 121 and the second electrode 122 may be configured as an anode electrode and a cathode electrode, respectively, as an example.

The first electrode 121 and the second electrode 122 may be partially protruded from the brush head 110, and referring to fig. 6, the first electrode 121 may have a height of 0.1mm to 3mm with respect to the brush head 110.

The height of the second electrode 122 may be the same as the height of the first electrode 121, and may have a height of 0.1mm to 3mm with respect to the toothbrush head 110, for example.

When the height h of the electrodes 121 and 122 is less than 0.1mm, a phenomenon that the electrodes 121 and 122 are buried in the toothbrush head 110 may occur when an Insert Injection Molding (Insert Injection Molding) process is performed, and when the height h of the electrodes 121 and 122 is greater than 3mm, a user may feel unpleasant due to a foreign body sensation and may lose teeth when gargling.

For example, the first electrode 121 and the second electrode 122 may be formed of a material such as brass (glass), Aluminum (Aluminum), conductive polymer (conductive polymer), conductive Silicon (conductive Silicon), or stainless steel (stainless steel), but is not limited thereto.

The head body 130 may be integrally formed with the toothbrush head 110, and for example, the toothbrush head 110 may be formed by insert injection molding.

A first connection line 131 and a second connection line 132 for transmitting a driving voltage may be disposed inside the head body 130.

The first and second connection lines 131 and 132 may be connected to the first and second electrodes 121 and 122, respectively, inside the head 110 of the toothbrush. The first connection wire 131 and the second connection wire 132 are formed long along the distal end portion side of the head body 130 so as to be able to receive power from the handle portion 200 and to be able to be connected to the first connection pin 151 and the second connection pin 152 disposed on the head cover 140.

For convenience of manufacture, the first connection line 131 and the first electrode 121 may be integrally formed, and the second connection line 132 and the second electrode 122 may also be integrally formed.

Also, the first and second connection lines 131 and 132 may be formed of the same substance as the electrode material described above.

The head cover 140 may be combined with the distal end portion of the head body 130 to close the distal end portion of the head body 130.

The first connection pin 151 and the second connection pin 152 are respectively connected to the first connection line 131 and the second connection line 132, and a portion thereof is exposed to the outside through the head cover 140.

When the head 100 is coupled to the handle 200, the connection pins 151 and 152 may contact connection terminals 361 and 362 (see fig. 7a) disposed in the handle 200.

Referring to fig. 4a to 4c, the head cover 140 may include a column portion 143 formed with a fixing pin receiving groove 148 therein.

The fixing pin receiving groove 148 may be formed at a lower surface of the head cover 140 and then may be combined with the fixing pin 220 of the handle part 200.

In this case, the protrusion 149 may be formed inside the fixing pin receiving groove 148, and when the fixing pin 220 is inserted into the fixing pin receiving groove 148, the protrusion 149 may be combined with the recess 222 (see fig. 7c) of the fixing pin 220 to further improve the coupling force with the fixing pin 220.

The pillar portion 143 may be disposed at a central portion of the first base portion 141 and extend along the upper side. A first placement region 144a and a second placement region 144b may be provided on both sides of the pillar portion 143, respectively.

Thus, the first placement region 144a and the second placement region 144b can be formed on the upper surface of the first base portion 141.

At least one protrusion 146a, 146b may be disposed around the first placement region 144a and the second placement region 144b, respectively.

For example, at least one first protrusion 146a surrounding the first seating region 144a and at least one second protrusion 146b surrounding the second seating region 144b may be formed on the upper surface of the first base part 141.

Fig. 4a illustrates a case where the first and second protrusions 146a and 146b are respectively formed in 2, but is not limited thereto, and the number of the first and second protrusions 146a and 146b may be changed.

By the above-described structure of the protruding portions 146a, 146b, the distal end portions 131a, 132a of the respective connection lines 131, 132 can be stably placed in the placement regions 144a, 144 b.

The first pin holes 145a may be formed at the first disposition region 144a, and the second pin holes 145b may be formed at the second disposition region 144 b.

Accordingly, the first connection pin 151 may pass through the head cover 140 through the first pin hole 145a, and the second connection pin 152 may pass through the head cover 140 through the second pin hole 145 b.

On the other hand, in the column portion 143, a first guide groove 147a and a second guide groove 147b for guiding the first connection wire 131 and the second connection wire 132 are formed to be long in the longitudinal direction, respectively.

The second base part 142 may be formed at a lower side of the first base part 141, and the diameter of the second base part 142 is larger than that of the first base part 141. Only, the second base part 142 may be omitted as needed.

Referring to fig. 5a, a portion of the first and second connection wires 131 and 132 may be inserted into the first and second guide grooves 147a and 147b of the pillar portion 143, respectively, and the distal end portions 131a and 132a of the first and second connection wires 131 and 132 may be placed in the first and second placement regions 144a and 144b, respectively, in a bent (bending) state.

In this case, the distal end portions 131a and 132a of the first and second connection lines 131 and 132 may be bent in opposite directions, and may have first and second connection holes 131b and 132b corresponding to the first and second pin holes 145a and 145b, respectively.

For example, the distal end portion 131a of the first connecting wire 131 may be placed in the first placing region 144a in a state of being bent in the first direction, and thus, the first connecting hole 131b formed in the distal end portion 131a may be positioned on the first pin hole 145a of the first placing region 144 a.

Also, the terminal portion 132a of the second connection line 132 may be placed in the second placing region 144b in a state of being bent in a second direction opposite to the first direction, and thus, the second connection hole 132b formed in the terminal portion 132a may be positioned on the second pin hole 145b of the second placing region 144 b.

Referring to fig. 5b, the first connection pin 151 may be disposed to penetrate the first connection hole 131b of the first connection wire 131 and the first pin hole 145a of the head cover 140, and the second connection pin 152 may be disposed to penetrate the second connection hole 132b of the second connection wire 132 and the second pin hole 145b of the head cover 140.

One end portion of the first connection pin 151 may be electrically connected to the distal end portion 131a of the first connection wire 131 near the first connection hole 131b through a welding (soldering) process, and the other end portion of the first connection pin 151 may protrude downward through the first pin hole 145a of the head cover 140.

One end portion of the second connection pin 152 may be electrically connected to the distal end portion 132a of the second connection wire 132 near the second connection hole 132b through a soldering process, and the other end portion of the second connection pin 152 may protrude downward through the second pin hole 145b of the head cover 140.

For example, the first and second connection pins 151 and 152 may be pogo pins (pogo pins) having springs built therein.

After the assembly shown in fig. 5b is completed, the toothbrush head 110 and the head body 130 may be formed by performing an insert injection molding process.

Fig. 7a is an exploded view showing an internal structure of a handle portion according to an embodiment of the present invention, fig. 7b is a view showing a state where the components shown in fig. 7a are coupled, and fig. 7c is a view showing a fixing pin, a connecting terminal, and the like according to an embodiment of the present invention.

Referring to fig. 7a to 7c, the handle part 200 according to the embodiment of the present invention may include a fixing pin 220, an inner case 300, a battery 310, a switch 330, a vibration motor 340, a circuit board 350, a first connection terminal 361, a second connection terminal 362, and an upper cover 380.

The inner case 300 is accommodated in the outer case 210, and provides an area and a space for disposing components such as the battery 310, the switch 330, the vibration motor 340, and the circuit board 350.

A battery housing 320 for accommodating the battery 310 is formed at the lower portion of the inner case 300, and a vibration motor placing portion 301 for placing the vibration motor 340 is formed along the upper side of the battery housing 320. Further, a plate-shaped coupling portion 370 in which the connection terminals 361 and 362 and the fixing pin 220 are provided may be formed in the inner case 300.

A first battery terminal 321 and a second battery terminal 322 may be disposed in the battery receiving part 320, and the first battery terminal 321 and the second battery terminal 322 may be electrically connected to the circuit board 350, respectively. For example, the first battery terminal 321 may be connected to a first substrate terminal 351 of the circuit board 350, and the second battery terminal 322 may be connected to a second substrate terminal 352 of the circuit board 350.

The battery 310 is inserted into the battery housing portion 320 and electrically connected to the battery terminals 321 and 322.

For example, the Battery 310 may be a Primary Battery (Primary Battery) or a Secondary Battery (Secondary Battery).

In the case where the battery 310 is a primary battery, a user may periodically replace the battery 310, and in the case where the battery 310 is a secondary battery, the battery may be charged by various charging methods.

For example, the battery 310 may be charged in a wireless charging manner or a wired charging manner while being located in the battery housing part 320, and may be separated from the battery housing part 320 and charged by an additional charging device.

The switch 330 is used to control the power supply based on the battery 310, and may be disposed on the circuit board 350.

The vibration motor 340 may be disposed on a vibration motor placing portion 301 provided in the inner case 300, and may provide vibration for informing a user of the operation of the electric toothbrush 1.

For example, in the case where the user turns on the switch 330, the vibration motor 340 may start to operate and may continue to provide vibrations until the switch 330 is turned off. However, the operation mode of the vibration motor 340 is not limited thereto, and the vibration mode, the vibration intensity, and the like of the vibration motor 340 may be various.

The circuit board 350 may be fixedly disposed on the inner case 300 by fastening members 353, 354, etc., and may be disposed between the switch 330 and the vibration motor 340. Thus, the switch 330 may be disposed on the upper surface of the circuit board 350, and the vibration motor 340 may be disposed on the lower surface of the circuit board 350.

A circuit unit 400 (see fig. 10) for generating a driving voltage using the voltage of the battery 310 may be mounted on the circuit board 350.

The circuit unit 400 can generate a driving voltage using the voltage of the battery 310 supplied with the switch 330 turned on. The circuit unit 400 may supply a voltage for operating the vibration motor 340 to the vibration motor 340.

The first connection terminal 361 and the second connection terminal 362 may be respectively formed to penetrate the coupling portion 370, and when the head unit 100 is coupled to the handle unit 200, the first connection terminal 151 and the second connection terminal 152 of the head unit 100 may be respectively brought into contact with each other, thereby performing a function of transmitting the driving voltage generated in the circuit unit 400 to the head unit 100.

Therefore, the lower ends of the connection terminals 361 and 362 protruding along the lower side of the coupling portion 370 may be connected to the circuit board 350 on which the circuit portion 400 is mounted, and the upper ends of the connection terminals 361 and 362 protruding along the upper side of the coupling portion 370 may be exposed to the outside through the upper cover 380.

The fixing pin 220 may be disposed at the center of the coupling portion 370, formed long along the upper side, and may be inserted into and coupled to the fixing pin receiving groove 148 provided in the head portion 100. As described above, the fixing pin 220 may be formed with the recess 222 corresponding to the protrusion 149 of the fixing pin receiving groove 148.

The upper cover 380 may be disposed on the coupling portion 370 of the inner case 300, and may be formed of an insulating material such as silicon, for example.

The upper cover 380 may include a first opening 371 for exposing the first connection terminal 361 to the outside, a second opening 372 for exposing the second connection terminal 362 to the outside, and a third opening 373 for allowing the fixing pin 220 to pass through.

Fig. 8 is a view showing a coupling relationship of the battery cover, the inner case, and the outer case according to the embodiment of the present invention.

Referring to fig. 8, in the inner case 300 where the assembly of the switch 330, the vibration motor 340, the circuit board 350, etc. is completed, the outer case 210 may be provided along the outer side, and the battery cover 215 may be coupled to the lower portions of the inner case 300 and the outer case 210.

An O-ring 216(O-ring) for sealing and a spring 217 electrically connected to the second battery terminal 322 may be provided at the battery cover 215.

Fig. 9 is a view showing a section of a portion of an electric toothbrush when a head is combined with a handle part according to an embodiment of the present invention.

Referring to fig. 9, when the head portion 100 is coupled to the handle portion 200, the fixing pin 220 is inserted into the fixing pin receiving groove 148 and coupled thereto. Also, the first connection pin 151 connected to the distal end portion 131a of the first connection line 131 may contact the first connection terminal 361, and the second connection pin 152 connected to the distal end portion 132a of the second connection line 132 may contact the second connection terminal 362.

Then, the user can turn on the internal switch 330 by pressing the switch pressing region 211, and the circuit unit 400 can generate a driving voltage to supply the driving voltage to the first connection line 131 and the second connection line 132 through the circuit board 350 and the connection terminals 361 and 362. Thereby, the first electrode 121 and the second electrode 122 form an electromagnetic field for removing dental plaque based on the supplied driving voltage.

Fig. 10 is a diagram showing a circuit section according to an embodiment of the present invention, and fig. 11a to 11c are diagrams for explaining a driving voltage according to an embodiment of the present invention.

Referring to fig. 10, the circuit part 400 according to the embodiment of the present invention may include a dc-dc converter 410, a signal generating part 420, a filter 430, and a calibration part 440.

The dc-dc converter 410 may receive a voltage from the battery 310 to convert to a specified registered voltage. The voltage converted by the dc-dc converter 410 may be used as a voltage for driving the vibration motor 340.

For example, the dc-dc converter 410 may receive a battery voltage to operate with the switch 330 turned on, and the operation of the dc-dc converter 410 may be interrupted with the switch 330 turned off.

The signal generator 420 can operate based on the voltage received from the dc-dc converter 410, and can generate a driving voltage using the output voltage of the dc-dc converter 410.

In this case, the driving voltage may be set to a frequency of 1KHz to 1000 MHz. The plaque removal efficiency is lowered in the case where the driving voltage is set to a frequency less than 1KHz, and is lowered in the case where the driving voltage is set to an ultra high frequency greater than 1000 MHz. On the other hand, the frequency of the driving voltage may be set to a frequency of 5MHz to 15MHz suitable for removing dental plaque.

The signal Generator 420 may be implemented by a known structure such as an Oscillator (Oscillator) or a Function Generator (Function Generator).

The filter 430 may perform a filtering operation for the driving voltage generated by the signal generation part 420. For example, the Filter 430 may include a Low Pass Filter (Low Pass Filter) so that a driving voltage in a Sawtooth Wave (Sawtooth Wave) form may be converted into a Sine Wave (Sine Wave) form. However, the kind of the filter 430 is not limited, and various filters may be used according to the design structure.

The scaling part 440 may perform voltage scaling for the driving voltage supplied from the filter 430 to output.

In this case, the scaling unit 440 may receive a driving voltage in an Alternating Current (AC) form, and apply a Direct Current (DC) voltage to the corresponding driving voltage to adjust an offset of the driving voltage.

Thus, the driving voltage may be a stack of an ac voltage and a dc voltage.

Referring to fig. 11a, the scaling part 440 may receive an ac voltage having an amplitude of a volts V from the filter 430, and stack a dc voltage of B volts V as shown in fig. 11B at the corresponding ac voltage to generate a final driving voltage as shown in fig. 11 c.

In this case, the ratio (ratio) of the amplitude A of the voltage to the voltage value B of the DC voltage may be set to 1:0.5 to 1: 10.

For example, in the case where the amplitude a of the alternating voltage is set to 0.2V to 0.3V, the voltage value B of the direct voltage may be set to 0.1V to 3.0V.

As described above, the driving voltage is set in a form in which the ac voltage and the dc voltage are stacked, and the risk of electric shock to the body and pain that may be caused to the body can be reduced as compared with the case where only the dc voltage is applied. However, the present invention is not limited to this, and the drive voltage may be only a direct current voltage or an alternating current voltage, as needed.

Although not shown, an additional control section (Controller) may be provided in the circuit section 400.

On the other hand, the driving voltage supplied from the circuit unit 400 to the head unit 100 is set to 0.1mV to 3V. When the driving voltage is less than 0.1mV, it is difficult to expect the plaque removing effect, and when the driving voltage is more than 3V, there is a fear that toxic substances are generated due to electrolysis of body fluid.

In addition to the sine wave, the driving voltage may have a pulse wave (pulse wave), a square wave (square wave), a triangular wave (triangle wave), or the like.

Fig. 12a to 12e are diagrams showing the arrangement structure of electrodes according to another embodiment of the present invention.

Fig. 1 and 2 and the like described above show an embodiment in which the first electrode 121 and the second electrode 122 are respectively disposed on the toothbrush head 110 along the vertical direction, and the arrangement structure of the first electrode 121 and the second electrode 122 may be changed.

As the pressure, as shown in fig. 12a, the first electrode 121 and the second electrode 122 may be disposed along the horizontal direction, and the number of the first electrode 121 and the second electrode 122 may be different.

As shown in fig. 12b, an "I" shaped first electrode 121 may be disposed at the center of the toothbrush head 110, and a plurality of first electrodes 121 and second electrodes 122 may be disposed around the first electrode 121 in a linear shape.

Referring to fig. 12c, the plurality of first electrodes 121 may be disposed in a rectangular shape on the toothbrush head 110, and the plurality of second electrodes 122 may be disposed on the toothbrush head 110 between the first electrodes 121 or outside the first electrodes 121.

Referring to fig. 12d, the first electrode 121 and the second electrode 122 may have a cylindrical shape, and a plurality of electrodes may be disposed on the brush head 110.

Referring to fig. 12e, the first electrode 121 and the second electrode 122 may have a zigzag shape that engages with each other.

Fig. 13a and 13b are views showing the layout of the connecting wires and electrodes according to another embodiment of the present invention.

Referring to fig. 13a and 13b, one end 131c of the first connection line 131 may be connected to the first electrode 121 in a state of being bent along an upper side.

In this case, the consumption of the electrode material can be reduced as compared with the form shown in fig. 3, and the cost can be saved.

Although not shown, one end portion of the second connection line 132 may be bent upward in the same manner and connected to the second electrode 122.

The present invention may be embodied in other specific forms by those skilled in the art without departing from the spirit or essential characteristics thereof. The embodiments described above are therefore illustrative in all respects and are not intended to limit the present invention. The scope of the present invention is defined not by the above detailed description but by the scope of the claims to be described later, and all changes and modifications derived from the meaning and range of the claims and the equivalent concepts thereof are included in the scope of the present invention.