Electric toothbrush

Abstract

The present invention provides an electric toothbrush, comprising a handle and a brush head, wherein a power supply unit is arranged in the handle, the brush head comprises a brush handle and bristles, and the bristles are arranged at the head of the brush handle, wherein a vibration transmission rod is arranged at one end of the handle, and a vibration unit is arranged in the vibration transmission rod, and the vibration transmission rod is inserted into the brush handle from the tail of the brush handle; the vibration unit comprises a first vibration component and a second vibration component, the first vibration component comprises a first motor and a first eccentric wheel, the first motor drives the first eccentric wheel to rotate in a first direction, the second vibration component comprises a second motor and a second eccentric wheel, the second motor drives the second eccentric wheel to rotate in a second direction, the first direction and the second direction are opposite, and an ultrasonic vibration disk is also arranged on the second eccentric wheel. The electric toothbrush provided by the present invention has the advantages of comfortable grip, good cleaning effect, sterilization function, etc.

Description

Technical Field

[0001] The invention relates to the technical field of daily necessities, and in particular to an electric toothbrush with ultrasonic function. Background Art

[0002] The traditional manual toothbrush is a common tool for cleaning the oral cavity, but manual toothbrushes usually do not clean the teeth properly. Irregular manual operation force and action can cause bleeding gums and wear of tooth enamel. Now there is an electric toothbrush on the market, which uses the vibration of the vibration element set in the handle and transmits the vibration to the bristles of the brush head for brushing teeth, but the existing electric toothbrushes often have defects such as not being able to clean the oral cavity well, not being able to inhibit bacteria and sterilize, and damaging tooth enamel. In addition, the vibration element of the existing electric toothbrush is generally set inside the handle, and the handle vibrates strongly when used, affecting the operating feel. Summary of the invention

[0003] The purpose of the present invention is to provide an electric toothbrush which has a comfortable grip, good cleaning effect and a sterilization function.

[0004] In order to achieve the above-mentioned purpose, the present invention provides an electric toothbrush, comprising a handle and a brush head, wherein a power supply unit is arranged in the handle, and the brush head comprises a brush handle and bristles, and the bristles are arranged at the head of the brush handle, wherein a vibration transmission rod is arranged at one end of the handle, and a vibration unit is arranged in the vibration transmission rod, and the vibration transmission rod is inserted into the brush handle from the tail end of the brush handle; the vibration unit comprises a first vibration component and a second vibration component, the first vibration component comprises a first motor and a first eccentric wheel, the first motor drives the first eccentric wheel to rotate in a first direction, the second vibration component comprises a second motor and a second eccentric wheel, the second motor drives the second eccentric wheel to rotate in a second direction, the first direction and the second direction are opposite, and an ultrasonic vibration disk is also arranged on the second eccentric wheel.

[0005] It can be seen from the above technical solution that the vibration unit is arranged in the vibration transmission rod, and the vibration energy is transmitted to the bristles on the brush head through the vibration transmission rod, which greatly reduces the vibration of the handle and improves the comfort of the handle. The vibration energy transmission efficiency of the vibration transmission rod is high, which is conducive to reducing energy consumption and increasing the use time of each charge. Vibrations in different directions are generated by the first eccentric wheel and the second eccentric wheel, and the ultrasonic waves generated by the ultrasonic vibration disk are transmitted to the bristles, so that the liquid phase molecules at the bristles can form cavitation nuclei, and the cavitation nuclei burst instantly to produce a local high-pressure environment, and generate ultrasonic cavitation microjets with strong impact, so that the bacteria lose their virulence or die, thereby achieving the purpose of sterilization. The ultrasonic cavitation microjets can also remove tartar and plaque, and the cleaning effect can penetrate into the gaps between teeth and uneven tooth surfaces in all directions to achieve comprehensive cleaning.

[0006] A further solution is that a bristle installation area is provided at the head of the brush handle, and a plurality of bristle installation holes are provided in the bristle installation area, and the bristles are installed in the bristle installation holes, and the bristle installation holes include a first installation hole and a second installation hole, and the cross section of the first installation hole is elliptical, and the cross section of the second installation hole is a water drop arc with one end wide and the other end narrow. The bristle installation area is elliptical, and two first installation holes are respectively provided on the outer side of the middle of the bristle installation area, and a plurality of second installation holes are provided in other areas of the bristle installation area.

[0007] It can be seen that, since the vibration energy is greatly attenuated when it is transmitted in the elliptical first mounting hole, the vibration frequency of the bristles in the first mounting hole is low; since the vibration energy is less attenuated when it is transmitted in the water drop arc second mounting hole, the vibration frequency of the bristles in the second mounting hole is high; when brushing teeth, the bristles in the first mounting hole are located at the gum position, and a small vibration frequency is beneficial to protecting the gums and preventing damage to the gums, while the bristles in the second mounting hole are located on the tooth surface, and a large vibration frequency is beneficial to cleaning the tooth surface. The above-mentioned partition cleaning method can ensure the cleaning effect of the electric toothbrush and avoid gum damage.

[0008] A further solution is that the bristles are wavy, and the length of the bristles in the middle and at both ends of the bristle installation area is greater than the length of other bristles.

[0009] It can be seen that the wavy bristles are helpful for cleaning the concave parts at the ends of the teeth.

[0010] A further solution is that a hollow connecting cavity is provided at the tail of the brush handle, and the connecting cavity includes a cylindrical first connecting cavity and a truncated cone-shaped second connecting cavity from the inside to the outside. The cylindrical head of the vibration transmission rod passes through the second connecting cavity and is inserted into the first connecting cavity. A plurality of protrusions are evenly arranged on the peripheral wall of the first connecting cavity.

[0011] It can be seen that the cylindrical head of the vibration transmission rod collides with the protrusion of the peripheral wall of the first connecting cavity, thereby transmitting the vibration energy to the brush head, thereby improving the energy transmission efficiency.

[0012] A further solution is that the power supply unit is a rechargeable battery, and the electric toothbrush also includes a wireless charging base, a wireless transmitting coil is provided in the wireless charging base, a plug connected to the wireless transmitting coil is provided on the wireless charging base, a wireless receiving coil that is mutually inductive with the wireless transmitting coil is provided at the bottom of the handle, and the wireless receiving coil is connected to the rechargeable battery.

[0013] This shows that wireless charging improves charging safety.

[0014] A further solution is that the wireless charging base includes a flat first side wall and an arc-shaped second side wall, a flat bottom wall is arranged at the bottom of the first side wall and the second side wall, the first side wall, the second side wall and the bottom wall form a accommodating portion with an open upper end, an opening portion is arranged through the second side wall, the opening portion extends from the upper end of the second side wall to the bottom wall, a contraction portion is arranged on the opening portion, and the lower end of the handle can be inserted into the accommodating portion; a closed first accommodating cavity is arranged in the bottom wall, the plug is arranged at the bottom of the first side wall, and the wireless transmitting coil is arranged in the first accommodating cavity.

[0015] It can be seen that the plug is arranged on the flat first side wall, which is convenient for plugging the wireless charging base into the socket for charging; the opening portion is arranged to facilitate observing the changes in the charging state during the charging process and is conducive to the outflow of water from the accommodating portion; the contraction portion is arranged at the opening to prevent the handle from falling from the opening.

[0016] A further solution is that a first coil is provided in the rechargeable battery, a first strong magnet is provided in the handle, the first strong magnet is located below the rechargeable battery, and a second coil is wound around the first strong magnet; a closed second accommodating cavity is provided in the first side wall, a second strong magnet is provided in the second accommodating cavity, the second strong magnet is directly opposite to the first strong magnet, a third coil is wound around the second strong magnet, and the third coil is connected to the wireless transmitting coil; the magnetic induction intensities of the first strong magnet and the second strong magnet are both greater than 1T.

[0017] It can be seen that through the magnetic conductivity transmission between the first strong magnet and the second strong magnet, when the rechargeable battery is almost fully charged, only a small part of the current is slowly charged into the rechargeable battery, which can protect the rechargeable battery and avoid self-discharge caused by overcharging, effectively prolonging the service life of the rechargeable battery and reducing the attenuation of the rechargeable battery capacity.

[0018] A further solution is that the magnetic induction intensity of the first strong magnet is 1.28T to 1.32T, and the magnetic induction intensity of the second strong magnet is 1.13T to 1.17T.

[0019] A further solution is that a heat dissipation ring is arranged outside the second vibration component, and the heat dissipation ring is made of an alumina ceramic material.

[0020] It can be seen that due to the high heat dissipation efficiency of the alumina ceramic material, it can dissipate heat quickly and prevent the second vibration component from being damaged by excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a structural diagram of an electric toothbrush embodiment of the present invention.

[0022] Figure 2 It is a front view of the handle of an electric toothbrush embodiment of the present invention.

[0023] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.

[0024] Figure 4 It is a bottom view of the handle of the electric toothbrush embodiment of the present invention.

[0025] Figure 5 It is an enlarged view of the head structure of the handle of the electric toothbrush embodiment of the present invention.

[0026] Figure 6 It is a left side view of the brush head of the electric toothbrush embodiment of the present invention.

[0027] Figure 7 1 is a structural diagram of a handle of an electric toothbrush embodiment of the present invention.

[0028] Figure 8 2 is a cross-sectional view of a handle of an electric toothbrush embodiment of the present invention.

[0029] Fig. 9 It is a schematic structural diagram of a vibration unit of an electric toothbrush embodiment of the present invention.

[0030] Fig.10 It is a structural diagram of the wireless charging base of the electric toothbrush embodiment of the present invention at a first viewing angle.

[0031] Fig.11 It is a structural diagram of the wireless charging base of the electric toothbrush embodiment of the present invention at a second viewing angle.

[0032] Fig.12 is a cross-sectional view of a wireless charging base of an electric toothbrush embodiment of the present invention.

[0033] Fig.13 1 is a charging principle diagram of an electric toothbrush embodiment of the present invention.

[0034] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0035] See also Figure 1 , Figure 1 : is a structural diagram of an embodiment of an electric toothbrush of the present invention. In this embodiment, the electric toothbrush comprises a handle 1, a brush head 2 and a wireless charging base 3, the brush head 2 is arranged at the upper end of the handle 1, and the handle 1 is inserted into the wireless charging base 3 for charging.

[0036] The handle 1 has a cylindrical shell 10, on the surface of which a switch button 11, a transparent cover 12 and a mode switching button 13 are provided. A display module can be provided in the transparent cover 12, and the display module can be, for example, an LED light, which is used to display information such as power level and vibration mode.

[0037] The brush head 2 includes a brush handle 20 and bristles 21 . The bristles 21 are arranged on the head 200 of the brush handle 20 .

[0038] See also Figure 2 , Figure 3 and Figure 4 , Figure 2 is a front view of the handle of an electric toothbrush embodiment of the present invention, Figure 3 yes Figure 2 Sectional view along the AA direction, Figure 4 It is a bottom view of the handle of the electric toothbrush embodiment of the present invention. The handle 20 includes a head 200 and a tail 201, and the head 200 and the tail 201 are made of plastic material in one piece. The head 200 is provided with a bristle mounting area, and a plurality of bristle mounting holes 210 are provided in the bristle mounting area, and the bristles 21 are installed in the bristle mounting holes 210. The tail 201 is in the shape of a truncated cone with a small top and a large bottom, and a hollow connecting cavity is provided in the tail 201, and the connecting cavity includes a cylindrical first connecting cavity 221 and a truncated cone-shaped second connecting cavity 222 from the inside to the outside, and the lower end of the second connecting cavity 222 is an open end. A plurality of protrusions 223 are evenly arranged on the peripheral wall of the first connecting cavity 221, and the protrusions 223 extend along the axial direction of the first connecting cavity 221. In this embodiment, four protrusions 223 are arranged, wherein the planes where two opposite protrusions 223 are located are parallel to the plane where the bristle installation area is located, and the planes where the other two opposite protrusions 223 are located are perpendicular to the plane where the bristle installation area is located. The opening end of the second connecting cavity 222 is provided with mounting grooves 224 and 225 for facilitating the installation of the brush head, and one end of the mounting groove 224 is provided with a fixing hole 226 that penetrates the peripheral wall of the tail 201.

[0039] See also Figure 5 , Figure 5It is an enlarged view of the head structure of the brush handle of the electric toothbrush embodiment of the present invention. In this embodiment, the head 200 of the brush handle 20 is generally elliptical, the bristle installation area provided in the head 200 is elliptical, and the bristle installation holes 210 provided in the bristle installation area include a first installation hole 211 and a second installation hole 212. The cross section of the first installation hole 211 is elliptical, and the cross section of the second installation hole 212 is a water drop arc with one end wide and the other end narrow. Two first installation holes 211 are respectively provided on the outer side of the middle part of the bristle installation area, and multiple second installation holes 212 are provided in other areas of the bristle installation area. After the bristles are installed in the first mounting hole 211 and the second mounting hole 212, the shape of the bristles in the first mounting hole 211 is elliptical, and the shape of the bristles in the second mounting hole 212 is teardrop-shaped. The advantages of this arrangement are: when the vibration energy is transmitted in the elliptical first mounting hole 211, the energy attenuation is large, so that the vibration frequency of the bristles in the first mounting hole 211 is small; when the vibration energy is transmitted in the teardrop-shaped second mounting hole 212, the energy attenuation is small, so that the vibration frequency of the bristles in the second mounting hole 212 is large. When brushing teeth, the bristles in the first mounting hole 211 are located at the gum position, and the small vibration frequency is beneficial to protecting the gums and preventing damage to the gums, while the bristles in the second mounting hole 212 are located on the tooth surface, and the large vibration frequency is beneficial to cleaning the tooth surface.

[0040] See also Figure 6 , Figure 6 It is a left view of the brush head of the electric toothbrush embodiment of the present invention. The brush head 2 includes a brush handle 20 and bristles 21. The bristles 21 are wavy, that is, the length of the bristles in the middle and at both ends is greater than the length of the bristles in other positions. From the left view, the bristles 21 include raised parts 213, 214, 215 and recessed parts 216, 217. When brushing teeth, the raised part 214 and the recessed parts 216, 217 on both sides thereof fit well with the recessed part of the tooth end surface, thereby effectively cleaning the teeth in this part.

[0041] See also Figure 7 and Figure 8 , Figure 7 is a structural diagram of a handle of an electric toothbrush embodiment of the present invention, Figure 8 1 is a cross-sectional view of the handle of an electric toothbrush embodiment of the present invention. A vibration transmission rod 14 is provided at one end of the handle 1 connected to the brush head 2. The vibration transmission rod 14 includes a cylindrical head 140 and a truncated cone-shaped tail 141. The head 140 and the tail 141 are integrally formed of plastic material. The length of the head 140 is shorter than that of the tail 141. A mounting block 142 is provided on the outer peripheral wall of the tail 141. When the brush head 2 is mounted on the handle 1, the head 140 of the vibration transmission rod 14 passes through the second connection cavity 222 of the brush handle 20 and then is inserted into the first connection cavity 221 (see FIG. 1 ). Figure 3) in the brush handle 20, when the vibration transmission rod 14 vibrates, its head 140 and the protrusion 223 in the brush handle 20 (see Figure 3 , Figure 4 ) collides, transmitting the vibration energy to the brush handle 20. The cooperation between the head 140 and the protrusion 223 improves the transmission efficiency of the vibration energy. The vibration transmission rod 14 and the brush handle 20 are connected by the mounting block 142 and the mounting grooves 224 and 225 (see Figure 3 ) for fixed connection. This connection method is simple and reliable, and can achieve quick installation and removal of the brush head.

[0042] A vibration unit 15 is disposed in the vibration transmission rod 14, and the vibration unit 15 provides vibration energy. Since the vibration unit 15 is disposed in the vibration transmission rod 14, the vibration energy of the vibration unit 15 is almost all transmitted to the vibration transmission rod 14, the vibration of the handle 1 is very small during use, the grip of the handle 1 is comfortable, and the vibration is transmitted to the brush head 2 through the vibration transmission rod 14, the energy utilization rate is high, and the use time of a single charge is increased.

[0043] A power supply unit is also provided in the handle 1. In this embodiment, the power supply unit is a rechargeable battery 16, such as a lithium-ion battery. A first strong magnet 17 is provided on the inner wall of the handle 1 below the rechargeable battery 16. A wireless receiving coil 18 is provided at the bottom of the handle 1. The wireless receiving coil 18 is connected to the positive and negative electrodes of the rechargeable battery 16. The rechargeable battery 16 is electrically connected to the vibration unit 15 through the control circuit board, thereby controlling the operation of the vibration unit 15.

[0044] See also Fig. 9 , Fig. 9 : is a schematic diagram of the structure of the vibration unit of the electric toothbrush embodiment of the present invention. The vibration unit 15 includes a first vibration component and a second vibration component, and the first vibration component is located above the second vibration component. The first vibration component includes a first motor 150 and a first eccentric wheel 151. The first motor 150 drives the first eccentric wheel 151 to rotate in a first direction, and a first vibration source is generated when the first eccentric wheel 151 rotates; the second vibration component includes a second motor 152 and a second eccentric wheel 153. The second motor 152 drives the second eccentric wheel 153 to rotate in a second direction, and a second vibration source is generated when the second eccentric wheel 153 rotates. The first direction and the second direction are opposite. For example, if the first direction is clockwise, then the second direction is counterclockwise; if the first direction is counterclockwise, then the second direction is clockwise. It can be seen that the vibration direction of the first vibration source is opposite to the vibration direction of the second vibration source. The first vibration component is arranged in the forward direction, that is, the first eccentric wheel 151 is arranged above the first motor 150; the second vibration component is arranged in the reverse direction, that is, the second eccentric wheel 153 is arranged below the second motor 152, and the first motor 150 and the second motor 152 are adjacent. The advantage of such arrangement is that it can reasonably utilize space and reduce the overall size of the vibration unit.

[0045] The second eccentric wheel 153 is also provided with an ultrasonic vibration disk 154, which is made of diamond tungsten steel alloy and generates ultrasonic waves. A heat dissipation ring 155 is provided outside the second vibration component, and the heat dissipation ring 155 is made of alumina ceramic material. In this embodiment, the heat dissipation ring 155 is made of 99 porcelain with an alumina content of 99%, which has a very ideal heat dissipation effect. Due to the high heat generation of the ultrasonic vibration disk 154, the metal heat dissipation material cannot achieve the ideal heat dissipation effect. When running continuously for 20 minutes, the heat dissipation efficiency of the heat dissipation ring 155 of the present invention is 6 times that of the heat dissipation efficiency of the ordinary metal heat dissipation ring. The inner cavity diameter of the heat dissipation ring 155 gradually increases from top to bottom, and the second vibration component is located in the inner cavity of the heat dissipation ring 155.

[0046] See also Figures 1 to 9 , the electric toothbrush of the present invention includes at least two working modes.

[0047] The first mode: turn on the switch button 11, press the mode switching button 13, the rechargeable battery 16 sends the first control signal to the first motor 150 through the control circuit board, the first motor 150 drives the first eccentric wheel 151 to rotate, the first eccentric wheel 151 rotates to generate mechanical vibration, the vibration transmission rod 14 transmits the mechanical vibration to the brush head 2, the bristles 21 on the brush head 2 vibrate in one direction, and the bristles 21 can clean the teeth during the vibration process. Continue to press the mode switching button 13 to change the strength of the first control signal, thereby changing the vibration strength of the bristles 21, that is, the first mode can have multiple gears.

[0048] Second mode: Press the mode switching button 13, the rechargeable battery 16 sends a second control signal to the first motor 150, the second motor 152 and the ultrasonic vibration disk 154 through the control circuit board at the same time, the first motor 150 drives the first eccentric wheel 151 to rotate, the second motor 152 drives the second eccentric wheel 153 to rotate, the ultrasonic vibration disk 154 generates ultrasonic waves that are transmitted through the first eccentric wheel 151 and the second eccentric wheel 153, the vibration wave frequency of the first eccentric wheel 151 is 36000 Hz, the vibration wave frequency of the second eccentric wheel 153 is 29000 Hz, but the first eccentric wheel 151 and the second eccentric wheel 153 are The rotation direction is opposite to that of the bristles 21. After the two opposite direction wave frequencies are transmitted to the bristles 21, they collide with the liquid at the bristles 21, and the attraction between the liquid molecules is broken to form a cavitation nucleus. The life of the cavitation nucleus is about 0.1 microseconds, and the cavitation nucleus bursts instantly. At the moment of the burst, a local high-pressure environment of about 100MPa can be generated, and an ultrasonic cavitation microjet with a speed of about 110m / s with a strong impact can be generated, which makes the bacteria lose their virulence or die, thereby achieving the purpose of sterilization. The ultrasonic cavitation microjets can also remove tartar, dental plaque, etc. In the second mode, the cleaning effect can penetrate into the gaps between teeth and uneven tooth surfaces in all directions to achieve comprehensive cleaning.

[0049] See also Figures 10 to 12 , Fig.10 and Fig.11 The wireless charging base of the electric toothbrush embodiment of the present invention is a structural diagram at different viewing angles. Fig.12 The figure is a cross-sectional view of the wireless charging base of the electric toothbrush embodiment of the present invention. The wireless charging base 3 includes a flat first side wall 31 and an arc-shaped second side wall 32. A flat bottom wall 33 is provided at the bottom of the first side wall 31 and the second side wall 32. A plug 310 is provided on the first side wall 31. The first side wall 31, the second side wall 32 and the bottom wall 33 form a receiving portion 34 with an open upper end. An opening portion 320 is provided through the second side wall 32. The opening portion 320 extends from the upper end of the second side wall 32 to the bottom wall 33. A contraction portion 321 is provided on the opening portion 320. The contraction portion 321 reduces the distance between the side walls at both ends of the opening portion 320. The lower end of the handle 1 can be inserted into the receiving portion 34 (see Figure 1 The benefit of setting the opening 320 is that it is conducive to water flowing out from the bottom of the opening 320. In addition, when an LED display light is set at the lower end of the handle 1, the state change of the LED display light can be observed through the opening 320. The contraction portion 321 is set on the opening 320 to prevent the handle 1 from falling from the opening 320.

[0050] A closed first accommodating cavity 330 is provided in the bottom wall 33, a wireless transmitting coil 331 is provided in the first accommodating cavity 330, and the plug 310 passes through the surface of the first side wall 31 and is connected to the wireless transmitting coil 331. A closed second accommodating cavity 311 is provided in the first side wall 31, and a second strong magnet 312 is provided on the side wall of the second accommodating cavity 311.

[0051] The electric toothbrush of the present invention is charged by the trickle charging principle. Fig.13 , connect the plug 310 of the wireless charging base 3 to the 220V mains electricity, the conversion module converts the AC power into DC power and flows through the wireless transmitting coil 331, the wireless receiving coil 18 in the handle 1 generates an induced current, and the wireless receiving coil 18 is connected to the positive and negative poles of the rechargeable battery 16 to charge the rechargeable battery 16. The rechargeable battery 16 is provided with a first coil 160 near the bottom, and the length between the first coil 160 and the bottom wall of the rechargeable battery 16 is 1 / 5 of the entire length of the rechargeable battery 16. The rechargeable battery 16 is charged section by section in the direction of the arrow A in the figure. When the charge reaches 80%, the first coil 160 has current passing through it. The handle 1 is also provided with a first strong magnet 17 below the rechargeable battery 16, and the first strong magnet 17 is provided with a second coil 170. When the first coil 160 generates current, the second coil 170 generates an induced current accordingly, which is equivalent to diverting the current on the first coil 160 to the second coil 170. A second strong magnet 312 is arranged on the wireless charging base 3 opposite to the first strong magnet 17, and a third coil 313 is arranged on the second strong magnet 312. The first strong magnet 17 and the second strong magnet 312 are magnetically conductively transferred. The first strong magnet 17 and the second strong magnet 312 are equivalent to a resistor with a large resistance value. The current decays during the transfer process and finally returns to the wireless receiving coil 18 after passing through the third coil 313. It can be seen that when the charge is 80%, only a small part of the current is slowly charged into the rechargeable battery 16, which can protect the rechargeable battery 16, avoid self-discharge caused by overcharging, effectively improve the service life of the rechargeable battery 16 and reduce the attenuation of the capacity of the rechargeable battery 16. In this embodiment, the first strong magnet 17 and the second strong magnet 312 are both magnets with strong magnetic properties, and their magnetic induction intensity is greater than 1T (Tesla). For example, a strong neodymium iron boron magnet can be used. Preferably, the magnetic induction intensity of the first strong magnet is 1.28T to 1.32T, and the magnetic induction intensity of the second strong magnet is 1.13T to 1.17T.

[0052] Of course, the above embodiments are only preferred implementation schemes of the present invention, and there may be more changes in actual application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An electric toothbrush, comprising a handle and a brush head, wherein a power supply unit is arranged in the handle, and the brush head comprises a brush handle and bristles, wherein the bristles are arranged on the head of the brush handle, characterized in that: A vibration transmission rod is provided at one end of the handle, a vibration unit is provided inside the vibration transmission rod, and the vibration transmission rod is inserted into the brush handle from the tail of the brush handle; The vibration unit includes a first vibration component and a second vibration component, the first vibration component includes a first motor and a first eccentric wheel, the first motor drives the first eccentric wheel to rotate in a first direction, the second vibration component includes a second motor and a second eccentric wheel, the second motor drives the second eccentric wheel to rotate in a second direction, the first direction and the second direction are opposite, and the second eccentric wheel is also provided with an ultrasonic vibration disk; The first eccentric wheel is arranged above the first motor, and the second eccentric wheel is arranged below the second motor.

2. The electric toothbrush according to claim 1, characterized in that: A bristle mounting area is provided at the head of the brush handle, and a plurality of bristle mounting holes are provided in the bristle mounting area. The bristles are mounted in the bristle mounting holes, and the bristle mounting holes include a first mounting hole and a second mounting hole. The cross-section of the first mounting hole is elliptical, and the cross-section of the second mounting hole is a teardrop arc with one end wide and the other narrow.

3. The electric toothbrush according to claim 2, characterized in that: The bristle installation area is elliptical in shape, two first installation holes are respectively arranged on the outer side of the middle part of the bristle installation area, and a plurality of second installation holes are arranged in other areas of the bristle installation area.

4. The electric toothbrush according to claim 3, characterized in that: The bristles are wavy, and the lengths of the bristles in the middle and at both ends of the bristle installation area are greater than those of the other bristles.

5. The electric toothbrush according to claim 4, characterized in that: A hollow connecting cavity is provided at the tail of the brush handle, and the connecting cavity includes a cylindrical first connecting cavity and a truncated cone-shaped second connecting cavity from the inside to the outside. The cylindrical head of the vibration transmission rod passes through the second connecting cavity and is inserted into the first connecting cavity. A plurality of protrusions are evenly arranged on the peripheral wall of the first connecting cavity.

6. The electric toothbrush according to any one of claims 1 to 5, characterized in that: The power supply unit is a rechargeable battery, and the electric toothbrush also includes a wireless charging base, in which a wireless transmitting coil is arranged, and a plug connected to the wireless transmitting coil is arranged on the wireless charging base, and a wireless receiving coil that is mutually inductive with the wireless transmitting coil is arranged at the bottom of the handle, and the wireless receiving coil is connected to the rechargeable battery.

7. The electric toothbrush according to claim 6, characterized in that: The wireless charging base comprises a flat first side wall and an arc-shaped second side wall, a flat bottom wall is arranged at the bottom of the first side wall and the second side wall, the first side wall, the second side wall and the bottom wall form a receiving portion with an upper end opening, an opening portion is arranged through the second side wall, the opening portion extends from the upper end of the second side wall to the bottom wall, a contraction portion is arranged on the opening portion, and the lower end of the handle can be inserted into the receiving portion; A closed first accommodating cavity is arranged in the bottom wall, the plug is arranged at the bottom of the first side wall, and the wireless transmitting coil is arranged in the first accommodating cavity.

8. The electric toothbrush according to claim 7, characterized in that: A first coil is arranged in the rechargeable battery, a first strong magnet is arranged in the handle, the first strong magnet is located below the rechargeable battery, and a second coil is wound around the first strong magnet; A closed second accommodating cavity is provided in the first side wall, a second strong magnet is provided in the second accommodating cavity, the second strong magnet is directly opposite to the first strong magnet, a third coil is wound around the second strong magnet, and the third coil is connected to the wireless transmitting coil; The magnetic induction intensities of the first strong magnet and the second strong magnet are both greater than 1T.

9. The electric toothbrush according to claim 8, characterized in that: The magnetic induction intensity of the first strong magnet is 1.28T to 1.32T, and the magnetic induction intensity of the second strong magnet is 1.13T to 1.17T.

10. The electric toothbrush according to claim 1, characterized in that: A heat dissipation ring is arranged outside the second vibration component, and the heat dissipation ring is made of alumina ceramic material.

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