Electric toothbrush head and electric toothbrush

Abstract

The utility model discloses an electric toothbrush head and an electric toothbrush. The electric toothbrush head comprises a rod body, a brush body connected with the rod body and bristles. The brush body comprises a bristle planting part, and the bristle planting part comprises a bristle planting face and a back face which are opposite. And hair planting holes are formed in the hair planting surface. And the bristles are arranged in the bristle planting holes and extend out of the bristle planting surface of the bristle planting part. The bristles comprise at least two bristle groups, and each bristle group comprises at least two bristle bundles. And at least two brush wire groups are arranged at intervals in the length and / or width direction of the brush body. And in the same brush wire group, at least two bristle bundles are arranged at intervals. The minimum distance between the bristle bundles of the adjacent brush wire groups is larger than the distance between the adjacent bristle bundles in at least one brush wire group.

Description

Technical Field

[0001] The present application relates to the technical field of oral cleaning, and more specifically, to an electric toothbrush head and an electric toothbrush. Background Art

[0002] An electric toothbrush is an electronic device that can clean the oral cavity. Usually, the toothbrush head includes a brush body and bristles arranged on the side of the brush body where the bristle planting surface is located. During the operation of the electric toothbrush, the brush body will deform and the bristles will fit well with the area to be cleaned of the teeth. At the same time, the brush handle drives the toothbrush head to vibrate to clean the surface and gaps of the teeth. However, the bristle design on the current electric toothbrush head is unreasonable, which easily leads to poor cleaning effect. Utility Model Content

[0003] The embodiments of the present application provide an electric toothbrush head and an electric toothbrush, which are at least used to solve the problem of poor cleaning effect of electric toothbrushes.

[0004] The electric toothbrush head provided in the embodiment of the present application includes a rod body, a brush body connected to the rod body, and bristles. The brush body includes a hair-planting portion, and the hair-planting portion includes a hair-planting surface and a back surface opposite to each other. The hair-planting surface is provided with hair-planting holes. The bristles are arranged in the hair-planting holes and extend from the hair-planting surface of the hair-planting portion. The bristles include at least two brush filament groups, and each of the brush filament groups includes at least two hair bundles. In the length and / or width direction of the brush body, at least two of the brush filament groups are arranged at intervals. In the same brush filament group, at least two of the hair bundles are arranged at intervals. The minimum spacing between the hair bundles of adjacent brush filament groups satisfies: it is greater than the spacing between the adjacent hair bundles in at least one of the brush filament groups.

[0005] In the use of the electric toothbrush head of the present application, the bristles are in contact with the part to be cared for (i.e., the teeth and other structures in the oral cavity), and the vibration generated by the electric toothbrush head is used to remove the plaque on the surface of the teeth. For the same brush wire group, the interval between the bristles is relatively small, and the brush wire group has a good bristle density. Therefore, the adjacent bristles support each other, and can better transmit the vibration to the tooth surface when the electric toothbrush head vibrates, thereby having a good loosening effect on the plaque on the tooth surface. There is a relatively large gap between the bristles of the adjacent brush wire groups, so that the bristles near the edge area of ​​the brush wire group around the gap have a good degree of freedom. When the electric toothbrush head vibrates, the relatively large gap allows the bristles to have more space to swing and produce a good amplitude during vibration, thereby having a good peeling effect on the loosened plaque. Therefore, the electric toothbrush head achieves effective loosening of plaque and effective peeling of loose plaque during vibration through the design of different spacings between the bristle bundles of the brush wire group, thereby improving the cleaning effect of the electric toothbrush head.

[0006] In certain embodiments, the density of the hair bundles distributed in any of the brush filament groups is greater than the density of the hair bundles in the bristles.

[0007] The density of the hair bundles distributed in any brush filament group is greater than the density of the hair bundles in the bristles, which can more effectively transmit vibrations to the tooth surface to loosen dental plaque and improve the cleaning ability of local areas when the electric toothbrush head vibrates. The density of the hair bundles in the bristles is less than the density of the hair bundles distributed in any brush filament group, which can maintain the cleaning effect of the local area while avoiding excessive pressure and excessive stimulation on the teeth and gums caused by excessive hair bundle density in the overall area, thereby reducing possible damage to the teeth and gums.

[0008] In some embodiments, in the length direction of the brush body from close to the rod body to far from the rod body, the bristles include a proximal brush filament group and a distal brush filament group arranged in sequence, and the bristles of the proximal brush filament group are more than the bristles of the distal brush filament group. The minimum spacing between the bristles of the proximal brush filament group and the distal brush filament group is at least greater than the spacing between adjacent bristle bundles in the proximal brush filament group.

[0009] The proximal brush filament group is connected to the rod body, which can enhance the connection stability between the proximal brush filament group and the rod body and make the vibration transmission more stable. At the same time, the proximal brush filament group has a larger contact area with the oral cavity than the distal brush filament group, and relatively more hair bundles can more easily loosen the dental plaque in the oral cavity. The distal brush filament group is far away from the rod body and has better freedom when vibrating. At the same time, the relatively small number of hair bundles in the distal brush filament group can further increase the degree of freedom of the distal brush filament group when the electric toothbrush head vibrates, and enhance the effect of peeling off loose dental plaque. On the other hand, fewer hair bundles can reduce the foreign body sensation of the distal brush filament group when it goes deep into the oral cavity, and enhance the mobility of the distal brush filament group inside the oral cavity, making it easier to clean the hard-to-clean areas at the back of the oral cavity. The spacing between adjacent brush filament groups is greater than the spacing between adjacent bristle bundles in the proximal brush filament group, so that the bristle bundles near the edge area of ​​the brush filament group around the gap between the proximal brush filament group and the distal brush filament group have better freedom. When the electric toothbrush head vibrates, the relatively large spacing allows the bristle bundles to have more space to swing and produce a better amplitude during vibration, thereby having a better peeling effect on loose plaque.

[0010] In some embodiments, in the length direction of the brush body from close to the rod body to far from the rod body, the bristles include a proximal brush filament group, an intermediate brush filament group, and a distal brush filament group arranged in sequence. The bristles of the intermediate brush filament group are more than the bristles of the proximal brush filament group and the bristles of the distal brush filament group. The minimum spacing between bristle bundles of adjacent brush filament groups is at least greater than the spacing between adjacent bristle bundles in the intermediate brush filament group.

[0011] The middle brush wire group has the most hair bundles, which can maximize the contact area between the middle brush wire group and the oral cavity, and use the pressure transmitted to the middle brush wire group by the oral cavity to make the middle brush wire group fit more closely to the oral cavity, making it easier to loosen the dental plaque in the oral cavity. The minimum spacing between the hair bundles of the distal brush wire group and the hair bundles of the middle brush wire group, as well as the minimum spacing between the hair bundles of the proximal brush wire group and the hair bundles of the middle brush wire group, are both greater than the spacing between adjacent hair bundles in the middle brush wire group, which can allow the hair bundles around the gap between the proximal brush wire group and the middle brush wire group, as well as the hair bundles around the gap between the distal brush wire group and the middle brush wire group, to have greater freedom, which is more conducive to peeling the dental plaque loosened by the middle brush wire group from the teeth.

[0012] In certain embodiments, at least a portion of the hair bundles have sharp corners in cross-section.

[0013] The cross-sectional area of ​​the bristle bundle with a pointed cross section is small. When the electric toothbrush head vibrates, it can more easily embed into the gap between the plaque and the teeth, and can increase the contact length between the bristle bundle and the teeth, which helps to loosen the plaque on the tooth surface more effectively and remove the loosened plaque.

[0014] In certain embodiments, a cross section of a bristle bundle in an area near an edge of the brush filament group has a sharp corner.

[0015] The bristles in the area near the edge of the brush filament group have a higher degree of freedom. When the electric toothbrush vibrates, the bristles with sharp cross-sections can more easily embed into the gap between plaque and teeth, reducing the possibility of plaque re-adhering to the tooth surface and improving the plaque stripping effect of the area near the edge of the brush filament group.

[0016] In certain embodiments, the brush filament group includes a middle region and an edge region surrounding the middle region, and at least part of the bristle bundles in at least part of the edge region of the brush filament group are higher than the bristle bundles in the middle region.

[0017] At least part of the hair bundles in the edge area of ​​the same brush group are higher than the hair bundles in the middle area, which can make the contact area between the hair bundles in the middle area and the tooth surface larger, and better fit with the tooth surface, so as to better transmit the vibration brought by the motor to the rod body. The hair bundles in the edge area are higher and have a greater degree of freedom, and the deformation amplitude is higher than the hair bundles in the middle area. Therefore, the hair bundles in the edge area can have a larger coverage area when following the swing of the brush body. Even if the bristles deviate at a large angle due to following the swing of the brush body, they can still maintain fit with the tooth surface, improving the cleaning effect.

[0018] In some embodiments, when the brush body is deformed to the maximum from the side where the hair-planting surface is located toward the side where the back surface is located, the length of the hair bundles of adjacent brush filament groups abutting each other is no more than 1 / 3 of any adjacent hair bundles in the adjacent brush filament groups.

[0019] When the length of the bristle bundles of adjacent brush filament groups abutting against each other is greater than 1 / 3 of any adjacent bristle bundles in the adjacent brush filament groups, there is a certain distance between the bristle bundles of adjacent brush filament groups, and a single bristle bundle has a larger range of activity and cleaning range, which improves the cleaning efficiency of the brush filament group. In addition, the length of the bristle bundles of adjacent brush filament groups abutting against each other is less than 1 / 3 of the length of any one bristle bundle, which can reduce friction and wear between different bristle bundles and extend the service life of the electric toothbrush head.

[0020] In some embodiments, the minimum spacing between bristle bundles between adjacent brush filament groups ranges from [1.5 mm to 4.0 mm].

[0021] When the minimum spacing between the bristles of adjacent brush filament groups is in the range of [1.5mm, 4.0mm], the bristles of the bristles of adjacent brush filament groups will not interfere with each other, and a single bristle bundle has flexibility during cleaning. Moreover, the area to be cared for corresponding to the gap between the brush filament groups can be cleaned by the bristles of the brush filament groups around the gap after bending and deforming, thereby achieving comprehensive cleaning of the area to be cared for.

[0022] In some embodiments, the number of bristle-implanted portions is one, and the plurality of brush filament groups are all located on the bristle-implanted portion. When the bristles and / or the bristle-implanted portion are subjected to force, the brush body is deformed as a whole.

[0023] The overall deformed brush body can evenly disperse the pressure transmitted to the brush body by the part to be cared for, making the contact between the bristles and the tooth surface more uniform and close, avoiding excessive pressure in a local area and causing damage to the bristles and / or the implanted hair part in the area. The overall deformed brush body can also evenly transmit the vibration of the electric toothbrush head to the tooth surface, thereby loosening and peeling off dental plaque.

[0024] In some embodiments, the bristle implanting portion is one. A plurality of the brush filament groups are located on the bristle implanting portion. The bristle implanting portion includes a plurality of regions, each of which is provided with the brush filament group. When the bristles and / or the bristle implanting portion are subjected to force, at least one of the plurality of regions of the bristle implanting portion is deformed.

[0025] At least one of the multiple areas of the implanted hair portion is deformed, so that different areas of the implanted hair portion can adapt to different tooth surface structures, so that the bristles on the brush wire group can fit the tooth surfaces with different contours, ensuring the transmission of vibration energy of the electric toothbrush head, thereby enhancing the cleaning effect.

[0026] In some embodiments, there are at least two hair-implanted portions. The brush body further includes at least one connecting portion. In the length direction of the rod body, at least two hair-implanted portions are arranged in sequence and spaced apart. The connecting portion is arranged in the interval between two adjacent hair-implanted portions and is used to connect two adjacent hair-implanted portions. When the bristles and / or the hair-implanted portions are subjected to force, at least one of the connecting portions is deformed to drive at least one of the multiple hair-implanted portions to deform.

[0027] During the use of the electric toothbrush head, the bristles and the hair-planting part may be subjected to pressure from the part to be cared for, and the pressure will be transmitted to the connecting part connected to the hair-planting part. When the connecting part is deformed by force, the hair-planting parts connected to the connecting part will move away from or approach each other, so that the distance between adjacent hair-planting parts will change, thereby causing the brush body to bend and deform. Since the bristles and the hair-planting part can both fit in different positions of the part to be cared for and transmit different pressures to the connecting part, the direction and magnitude of the force deformation of the connecting part are different, and the vibration effect of the bristles transmitted from the rod to different hair-planting parts will be different, and the vibration effect of the bristles can be matched with the vibration transmission requirements of different fitting positions of the teeth, thereby improving the tooth cleaning effect.

[0028] In some embodiments, the bendable amount of the brush body from the side where the back surface is located toward the side where the hair-planting surface is located is smaller than the bendable amount of the brush body from the side where the hair-planting surface is located toward the side where the back surface is located.

[0029] During the use of the electric toothbrush head, the bristles and the implanted part are subjected to bending and deformation pressure from the side of the part to be cared for that faces the back, which is usually greater than the bending and deformation pressure from the side of the implanted part. The bending deformation of the brush body on the side of the implanted part is smaller, which can ensure that the bristles fit the tooth surface. The bending deformation of the brush body on the side of the implanted part is larger, which can absorb and disperse the pressure of the part to be cared for, reduce the direct impact on the part to be cared for, and thus adapt to different oral care needs.

[0030] In some embodiments, the hardness of the hair implantation portion is greater than that of the connecting portion.

[0031] The implanted hair part with greater hardness has a better supporting effect on the bristles in the implanted hair holes, and can ensure that the vibration of the brush body is transmitted from the bristles to the part to be cared for. The connecting part with less hardness can produce a larger deformation amplitude and drive the brush body to produce a larger deformation amplitude, so that the brush body and the tooth surface have a better fit effect. On the other hand, when the electric toothbrush head vibrates, the deformation of the connecting part with less hardness can make the adjacent implanted hair part produce a larger range of movement and cover a larger cleaning area. On another hand, when the electric toothbrush head falls, the brush body is the part that is most likely to fall to the ground first. The connecting part can provide the electric toothbrush head with a larger deformation amplitude, so that the electric toothbrush head has better anti-fall and breakage properties.

[0032] In some embodiments, the thickness of the hair implantation portion is greater than the thickness of the connecting portion.

[0033] The thickness of the implanted hair part is greater than that of the connecting part. The thicker implanted hair part has better supporting properties for the bristles, and the thinner connecting part is more likely to deform under stress, thereby driving the implanted hair parts to move closer to and / or away from each other, thereby making the bristles on different implanted hair parts produce different vibration effects.

[0034] In some embodiments, the width of the hair implantation portion is greater than the width of the connecting portion.

[0035] The width of the implanted hair part is greater than that of the connecting part. The wider implanted hair part has better supporting properties for the bristles, and the narrower connecting part is more likely to deform under stress, thereby driving the implanted hair parts to move closer to and / or away from each other, thereby making the bristles on different implanted hair parts produce different vibration effects.

[0036] In certain embodiments, the width of the connecting portion is greater than the thickness of the connecting portion.

[0037] When the width of the connecting part is greater than the thickness of the connecting part, on the one hand, the connecting part is more likely to deform in the direction of its own thickness, that is, the direction in which the bristles are subjected to force, when subjected to force, so that the bristles on the implanted part are moved to different positions, thereby improving the cleaning effect of the electric toothbrush head; on the other hand, the deformation of the connecting part is concentrated in the thickness direction, which can enable the connecting part to have better support in its own non-thickness direction, thereby avoiding separation of the connecting part when subjected to force, thereby causing damage to the electric toothbrush head.

[0038] In some embodiments, in the thickness direction of the brush body, the connecting portion does not extend beyond the hair implantation surface.

[0039] The connection part does not exceed the hair planting surface, which can provide a better deformation space for the hair planting surface to bend and deform toward the side where the hair planting surface is located in the thickness direction of the brush body.

[0040] In some embodiments, in the thickness direction of the brush body, the connecting portion does not extend beyond the back surface.

[0041] The connecting portion does not extend beyond the back surface, so that the back surface has a better deformation space when it is bent and deformed toward the side where the hair planting surface is located in the thickness direction of the brush body.

[0042] In some embodiments, in the thickness direction of the brush body, the distance between the connecting portion and the hair-implanting surface is greater than the distance between the connecting portion and the back surface.

[0043] When the connecting part is deformed under force, the connecting part is closer to the back side in the thickness direction, so that the deformation angle of adjacent hair-planted parts when they approach each other can be smaller than the deformation angle when they move away from each other, thereby limiting the adjacent hair-planted parts when they approach each other, and then controlling the approach distance of the bristles on the hair-planted parts, avoiding the bristles from squeezing each other and deforming, which affects the cleaning effect.

[0044] In some embodiments, in the length direction of the brush body, the back side is provided with a first notch on a side close to the connecting portion. When the brush body convexly deforms from the side where the back side is located toward the side where the hair-planting surface is located, the first notch is used to provide an escape space for the hair-planting portion.

[0045] The first notch on the back of the hair-planting part can provide an escape space for the hair-planting part when the brush body convexly deforms from the back side toward the hair-planting side (the connecting part deforms outward), thereby increasing the outward deformation of the brush body.

[0046] In some embodiments, a second gap is formed between adjacent hair-planting portions in the length direction of the brush body. When the brush body is convexly deformed from the hair-planting side toward the back side, the second gap is used to provide an escape space for the bristles.

[0047] The second gap between the implanted hair parts can provide an escape space for the implanted hair parts when the brush body convexly deforms from the implanted hair side toward the back side (the connecting part deforms inwardly), thereby increasing the inward deformation of the brush body.

[0048] In some embodiments, at least two of the hair implantation parts include a first hair implantation part connected to the rod body and a second hair implantation part farthest from the rod body in the length direction of the rod body. The hair implantation surface of the first hair implantation part has a larger area than the hair implantation surface of the second hair implantation part; and the thickness of the first hair implantation part is greater than the thickness of the second hair implantation part.

[0049] The first hair-planting part has a larger contact area with the oral cavity than the second hair-planting part. The larger area of ​​the first hair-planting part is designed to improve the oral cleaning efficiency. The second hair-planting part is usually closer to the inside of the oral cavity than the first hair-planting part. The smaller area of ​​the second hair-planting part can reduce the foreign body sensation in the oral cavity and improve the mobility of the electric toothbrush head in the oral cavity.

[0050] The thicker thickness of the first implanted hair part is conducive to improving the connection stability with the rod body, making the overall support of the electric toothbrush head better, the vibration transmission more stable, and easier to remove dental plaque from the tooth surface in the mouth. The thickness of the second implanted hair part away from the rod body is thinner than that of the first implanted hair part, which can make the second implanted hair part more swung under the drive of the connection part, with a wider scraping range, and easier to remove dental plaque peeled off the tooth surface.

[0051] In certain embodiments, at least two of the hair implanting portions include a first hair implanting portion connected to the rod body, a second hair implanting portion farthest from the rod body in the length direction of the rod body, and a third hair implanting portion located between the first hair implanting portion and the second hair implanting portion. The area of ​​the hair implanting surface of the third hair implanting portion is greater than the area of ​​the hair implanting surface of the first hair implanting portion. The area of ​​the hair implanting surface of the third hair implanting portion is greater than the area of ​​the hair implanting surface of the second hair implanting portion. The thickness of the third hair implanting portion is greater than the thickness of the first hair implanting portion. The thickness of the third hair implanting portion is greater than the thickness of the second hair implanting portion. The thickness of the first hair implanting portion is greater than the thickness of the second hair implanting portion.

[0052] When the bristles are subjected to force and the connecting portion is deformed, the first hair-implanted portion and the second hair-implanted portion can move in various directions away from the third hair-implanted portion with the third hair-implanted portion as the center, so that the bristles provided on the third hair-implanted portion, the first hair-implanted portion and the second hair-implanted portion can contact different positions of the portion to be cared for, thereby achieving cleaning of various positions of the portion to be cared for.

[0053] The thickness of the third hair implantation part is the largest, which allows the third hair implantation part to contact the oral cavity wall preferentially in the thickness direction, and use the pressure of the oral cavity wall to make the third hair implantation part fit the oral cavity more closely. The thickness of the second hair implantation part away from the rod body is smaller than that of the first hair implantation part, which allows the second hair implantation part to have stronger swinging ability under the drive of the connecting part, with a wider scraping range and easier to remove the plaque peeled off from the tooth surface.

[0054] In some embodiments, the hair-implanting portion includes a hair-implanting sheet and a reinforcing protrusion. The hair-implanting sheet includes the hair-implanting surface and a rear surface opposite to each other, and the reinforcing protrusion is arranged on the rear surface. The reinforcing protrusion is used to strengthen the strength of the hair-implanting portion.

[0055] When the hair implant part is deformed, the reinforcing protrusion can support one side of the rear surface of the hair implant part, thereby increasing the strength of the hair implant part and preventing the hair implant part from breaking. Furthermore, the reinforcing protrusion can provide stress support around the hair implant hole to ensure the strength of the hair implant hole and prevent the copper sheet from excessively squeezing the hair implant hole when the bristles are fixed in the hair implant hole by the copper sheet, thereby causing the hair implant part to break.

[0056] In some embodiments, the hair implantation hole is a blind hole, and the bristles are fixed in the hair implantation hole by a copper sheet.

[0057] Blind holes mean that the hair transplanting holes do not penetrate the hair transplanting sheet, which can reduce the possibility of the hair transplanting sheet breaking along the hair transplanting holes in the thickness direction. Therefore, the bristles are fixed in the hair transplanting holes by the copper sheet. The copper sheet can provide additional support for the part of the bristles inside the hair transplanting holes, reducing the pressure and friction on the bristles in the hair transplanting holes.

[0058] In some embodiments, in the direction from the hair-planting surface to the rear surface, a cross section of the reinforcing protrusion cut by a plane perpendicular to the thickness direction of the brush body gradually decreases.

[0059] For a hair-implanting portion with a larger thickness, the plane of the reinforcing protrusion along the thickness direction gradually decreases, which can reduce the volume of the electric toothbrush head, reduce the foreign body sensation, and improve the mobility of the electric toothbrush head in the oral cavity.

[0060] In some embodiments, the rod body has a mid-thickness plane, and the connecting portion intersects or connects with the mid-thickness plane.

[0061] The connecting portion intersects or connects with the mid-thickness dividing surface, which enables the electric toothbrush head to be divided in thickness during injection molding, making it easier for the brush head body to be integrally molded and more processable.

[0062] In some embodiments, the rod body has a width mid-plane, and the connecting portion intersects or connects with the width mid-plane.

[0063] The connecting portion intersects or connects with the width dividing surface, which enables the electric toothbrush head to be divided in width during injection molding, making it easier for the brush head body to be molded in one piece, thereby improving processability.

[0064] In some embodiments, the electric toothbrush head further comprises a deformable portion that is deformable under force, wherein the deformable portion is combined with at least one of the hair implantation portion, the connection portion, and the rod body to support and / or protect the portion combined with the deformable portion.

[0065] The deformable part can produce elastic deformation to avoid collision between the implanted hair part and the part to be cared for. The deformable part wrapped around the outside of the rod can make the connection between the rod and the brush body tighter, and can also provide a shock-absorbing effect for the rod to prevent the rod from breaking when the electric toothbrush head falls.

[0066] In certain embodiments, the deformation portion covers the back surface and the peripheral side surface of the hair-implanting portion, all surfaces of the connecting portion, and all outer surfaces of the rod body, and fills the gaps between adjacent hair-implanting portions.

[0067] The deformation part covers the back and side surfaces of the hair-planting part, all surfaces of the connecting part, and all outer surfaces of the rod body, which can provide a shock-absorbing effect on the hair-planting part, the connecting part and the rod body to avoid damage when the electric toothbrush head breaks. The deformation part fills the gap between adjacent hair-planting parts to prevent dirt from remaining in the gap.

[0068] In some embodiments, the deformation portion includes a first sub-portion covering the side of the hair implantation surface of the hair implantation portion and a second sub-portion covering the side of the back side of the hair implantation portion. The first sub-portion does not extend beyond the hair implantation surface. The surface of the second sub-portion away from the back side is a smooth curved surface.

[0069] The first sub-section can fill the gaps between multiple bristle-planted surfaces and between the bristle-planted surfaces and the connecting portion, and the second sub-section can fill the gaps between multiple back surfaces and between the back surfaces and the connecting portion, thereby preventing dirt from remaining in the gaps of the electric toothbrush head. The first sub-section does not extend beyond the bristle-planted surface, thereby preventing the material of the first sub-section from entering the bristle-planted holes. The surface of the second sub-section that is away from the back surface is a smooth curved surface, which can fill and compensate for the uneven shape of the brush body, making the brush body easier to clean.

[0070] In some embodiments, the deformation portion includes a first sub-portion covering the side of the hair implantation surface of the hair implantation portion and a second sub-portion covering the side of the back side of the hair implantation portion. The first sub-portion is flush with the hair implantation surface. The surface of the second sub-portion away from the back side is a smooth curved surface.

[0071] The first sub-part can fill the gaps between the multiple hair-planting surfaces and the gaps between each hair-planting surface and the connecting part, so as to avoid unevenness between the hair-planting surface and the connecting part of the electric toothbrush head, which may cause dirt residue and affect the use. The first sub-part is flush with the hair-planting surface, which is easy to cast and mold the deformation part.

[0072] The electric toothbrush of the embodiment of the present application comprises the electric toothbrush head and the brush handle as described in any one of the above embodiments. The electric toothbrush head is installed on the brush handle.

[0073] In the electric toothbrush of the present application, the brush handle can vibrate and transmit the vibration to the bristles on the electric toothbrush head. The bristles contact the part to be cared for and use the vibration generated by the electric toothbrush head to remove the plaque on the surface of the teeth. For the same brush wire group, the interval between the bristles is relatively small, and the brush wire group has a good bristle density. Therefore, the adjacent bristles support each other, and can better transmit the vibration to the tooth surface when the electric toothbrush head vibrates, so as to have a good loosening effect on the plaque on the tooth surface. There is a relatively large gap between the bristles of the adjacent brush wire groups, so that the bristles near the edge area of ​​the brush wire group around the gap have a good degree of freedom. When the electric toothbrush head vibrates, the relatively large gap allows the bristles to have more space to swing and generate a good amplitude during vibration, so as to have a good peeling effect on the loosened plaque. Therefore, the electric toothbrush head realizes the effective loosening of plaque and the effective peeling of loose plaque during vibration by designing the different spacings between the bristle bundles of the brush wire group, thereby improving the cleaning effect of the electric toothbrush head.

[0074] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0076] Figure 1 is a front view of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0077] Figure 2 is a side view of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0078] Figure 3 is a three-dimensional schematic diagram of an electric toothbrush head according to certain embodiments of the present application;

[0079] Figure 4 yes Figure 3 A three-dimensional schematic diagram of a partial structure of an electric toothbrush head shown;

[0080] Figure 5 is a schematic diagram of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0081] Figure 6 yes Figure 5 A schematic diagram of a portion of the structure of an electric toothbrush head is shown;

[0082] Figure 7 yes Figure 5 A front view of the electric toothbrush head shown;

[0083] Figure 8 yes Figure 5 A side view of the electric toothbrush head shown;

[0084] Fig. 9 is a three-dimensional schematic diagram of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0085] Fig.10 yes Fig. 9 A side view of the electric toothbrush head in one state shown;

[0086] Fig.11 yes Fig. 9 A side view of the electric toothbrush head in one state shown;

[0087] Fig.12 yes Fig. 9 A side view of the electric toothbrush head in another state;

[0088] Fig.13 is a front view of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0089] Fig.14 is a side view of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0090] Fig.15 is a three-dimensional schematic diagram of an electric toothbrush head according to certain embodiments of the present application;

[0091] Fig.16 yes Fig.15 A three-dimensional schematic diagram of a partial structure of an electric toothbrush head shown;

[0092] Fig.17 yes Fig.15 A schematic diagram of a partial structure of an electric toothbrush head shown;

[0093] Fig.18 yes Fig.17 A schematic diagram of a portion of the structure of an electric toothbrush head is shown;

[0094] Fig.19 yes Fig.17 A front view of the electric toothbrush head shown;

[0095] Fig. 20 yes Fig.17 A side view of the electric toothbrush head shown;

[0096] Fig.21 is a three-dimensional schematic diagram of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0097] Fig. 22 yes Fig.21A side view of the electric toothbrush head in one state shown;

[0098] Fig.23 yes Fig.21 A side view of the electric toothbrush head in one state shown;

[0099] Fig.24 yes Fig.21 A side view of the electric toothbrush head in another state;

[0100] Fig.25 It is a three-dimensional schematic diagram of an electric toothbrush according to certain embodiments of the present application.

[0101] Description of main component symbols:

[0102] Electric toothbrush 1000;

[0103] An electric toothbrush head 100 and a brush handle 300;

[0104] Rod body 10;

[0105] Brush body 30, hair transplantation part 31, hair transplantation surface 301, hair transplantation hole 3011, peripheral side 303, back 305, first notch 307, second notch 309, first hair transplantation part 311, second Hair transplantation part 313, third hair transplantation part 315, hair transplantation piece 317, rear surface 3171, reinforcing protrusion 319, connecting part 33, deformation part 35, first sub-part 351, second sub-part 353;

[0106] Bristles 50 , brush filament group 51 , bristle bundle 5111 , proximal brush filament group 511 , distal brush filament group 513 , and middle brush filament group 515 . DETAILED DESCRIPTION

[0107] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0108] In the description of the present application, it should be understood that the terms "thickness", "upper", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0109] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. In an example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection, or they can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.

[0110] See also Figure 1 , Figure 3 , Figure 4 , Fig. 9 , Fig.15 , Fig.16 and Fig.21 The electric toothbrush head 100 of the embodiment of the present application includes a rod body 10, a brush body 30 connected to the rod body 10, and bristles 50. The brush body 30 includes a hair-planting portion 31, and the hair-planting portion 31 includes a hair-planting surface 301 and a back surface 305 opposite to each other. The hair-planting surface 301 is provided with a hair-planting hole 3011. The bristles 50 are arranged in the hair-planting hole 3011 and extend from the hair-planting surface 301 of the hair-planting portion 31. The bristles 50 include at least two brush filament groups 51, and each brush filament group 51 includes at least two hair bundles 5111. In the length and / or width direction of the brush body 30, at least two brush filament groups 51 are arranged at intervals. In the same brush filament group 51, at least two hair bundles 5111 are arranged at intervals. The minimum spacing between the hair bundles 5111 of adjacent brush filament groups 51 satisfies: greater than the spacing between adjacent hair bundles 5111 in at least one of the brush filament groups 51.

[0111] Specifically, the rod body 10 is roughly a cylindrical structure, and the shape of the cross section of the rod body 10 includes but is not limited to a perfect circle, an ellipse or a polygon. The rod body 10 is connected to the brush body 30. In some embodiments, the rod body 10 and the brush body 30 are integrally formed. The materials of the rod body 10 and the brush body 30 can be the same or different, which is not limited here. In other embodiments, the rod body 10 and the brush body 30 are separately formed, and the rod body 10 and the brush body 30 can be connected by a non-detachable method such as gluing connection, hot melt connection or interference connection, or by a detachable method such as snap connection, threaded connection or bolt connection, which is not limited here. Among them, the length direction X of the electric toothbrush head 100 can be the direction in which the brush body 30 points to the rod body 10, or it can be the direction in which the rod body 10 points to the brush body 30. Along the length direction X of the electric toothbrush head 100, the brush body 30 includes a first end and a second end opposite to each other. The first end of the brush body 30 is away from the rod body 10, and the second end of the brush body 30 is close to the rod body 10. The width direction Y of the electric toothbrush head 100 is perpendicular to the length direction X of the electric toothbrush head 100. The thickness direction Z of the electric toothbrush head 100 is perpendicular to both the length direction X of the electric toothbrush head 100 and the width direction Y of the electric toothbrush head 100.

[0112] The brush body 30 is a component of the electric toothbrush head 100 for cleaning the part to be cared for. The hair-planting part 31 is a component for arranging the bristles 50. The connecting part 33 is a component arranged between two adjacent hair-planting parts 31 for connecting.

[0113] The hair-implanting portion 31 includes a hair-implanting surface 301 and a back surface 305 opposite to the hair-implanting surface 301. The deformation of the connecting portion 33 can drive the brush body 30 to bend and deform toward the side where the hair-implanting surface 301 is located and toward the side where the back surface 305 is located. The peripheral side surface 303 of the hair-implanting portion 31 is arranged between the hair-implanting surface 301 and the back surface 305, and connects the hair-implanting surface 301 and the back surface 305.

[0114] In some embodiments, the hair-implanting portion 31 and the connecting portion 33 are separately molded structures, and the hair-implanting portion 31 and the connecting portion 33 can be fixed to each other by non-detachable means such as gluing, hot-melt connection or interference connection, or can be connected to each other by detachable means such as snap connection, threaded connection or bolt connection, which is not limited here. In other embodiments, the hair-implanting portion 31 and the connecting portion 33 are integrally molded structures. A stable connection can be formed between the integrally molded hair-implanting portion 31 and the connecting portion 33, which can avoid the presence of gaps at the connection between the hair-implanting portion 31 and the connecting portion 33 that lead to dirt deposition, and can also avoid the connection between the hair-implanting portion 31 and the connecting portion 33 from separating when subjected to force, thereby damaging the electric toothbrush head 100 and extending the service life of the electric toothbrush head 100.

[0115] The bristle 50 is a structure for cleaning and / or caring for the teeth, gums or the inner wall of the oral cavity waiting for care. The bristle 50 includes a plurality of brush filaments. Specifically, the bristle 50 has at least one brush filament group 51, each brush filament group 51 has at least two bristle bundles 5111, and each bristle bundle 5111 has a plurality of brush filaments, and the brush filament is the smallest unit constituting the bristle 50. In addition, the material of the bristle 50 includes but is not limited to nylon, polyamide or silicone. In the case where the material of the bristle 50 is a hard material such as nylon or polyamide, the free end of the bristle 50 can contact the tooth surface and clean the teeth and the gaps between the teeth. In the case where the material of the bristle 50 is a flexible material such as silicone, the free end of the bristle 50 can contact the tooth surface to perform a polishing-like care on the tooth surface, and the free end of the bristle 50 can also be used to clean the gums or the inner wall of the oral cavity, which are easily damaged, so that the cleaning effect of the electric toothbrush head 100 is better without causing damage to the user.

[0116] In some embodiments, the hair-implanting portion 31 and the bristles 50 are integrally formed. In other embodiments, the hair-implanting portion 31 and the bristles 50 are separately formed. One end of the bristles 50 extends from the hair-implanting surface 301 into the hair-implanting portion 31 and is installed on the hair-implanting portion 31, and the other end of the bristles 50 is a free end located on the side of the hair-implanting surface 301 of the hair-implanting portion 31. The extension direction of the bristles 50 can be parallel to the thickness direction Z of the electric toothbrush head 100, or can be inclined to the thickness direction Z of the electric toothbrush head 100, which is not limited here. There is a gap between adjacent hair-implanting portions 31, and the connecting portion 33 is located in the gap and is a structure that can connect at least two mutually spaced hair-implanting portions 31. The connecting portion 33 is a plate-like structure with a small thickness and / or width and is easily bent and deformed by force. When a user uses the electric toothbrush head 100, the user will apply external force to the bristles 50 and / or the hair-planting portion 31. At this time, the bristles 50 and / or the hair-planting portion 31 will be compressed and bent on the one hand, and on the other hand, the external force will be transmitted to the hair-planting portion 31 connected to the bristles 50. Since adjacent hair-planting portions 31 are connected to each other only by the connecting portion 33, when the hair-planting portion 31 is subjected to force, the connecting portion 33 will bend and deform along the thickness direction Z of the electric toothbrush head 100 under the action of external force. At this time, the size of the gap between adjacent hair-planting portions 31 will change, so that the brush body 30 will be deformed.

[0117] During the use of the electric toothbrush head 100, the bristles 50 contact the part to be cared for and use the vibration generated by the electric toothbrush head 100 to remove the plaque on the surface of the teeth. For the same brush wire group 51, the intervals between the bristle bundles 5111 are relatively small, and the brush wire group 51 has a good bristle bundle density. Therefore, the adjacent bristle bundles 5111 support each other, and can better transmit the vibration to the tooth surface when the electric toothbrush head 100 vibrates, thereby having a good loosening effect on the plaque on the tooth surface. There are relatively large gaps between the bristle bundles 5111 of adjacent brush wire groups 51, so that the bristle bundles 5111 near the edge area of ​​the brush wire group 51 around the gap have a good degree of freedom. When the electric toothbrush head 100 vibrates, the relatively large gaps allow the bristle bundles 5111 to have more space to swing during vibration and produce a good amplitude, thereby having a good peeling effect on the loosened plaque. Therefore, by designing the gaps between the bristles 5111 of the bristle group 51 with different spacings, the electric toothbrush head 100 can effectively loosen and peel off the loosened plaque during vibration, thereby improving the cleaning effect of the electric toothbrush head 100.

[0118] See also Figure 1 , Figure 4 , Fig.13 and Fig.16 In some embodiments, the density of the bristle bundles 5111 distributed in any brush filament group 51 is greater than the density of the bristle bundles 5111 in the bristle 50.

[0119] Specifically, the hair bundles 5111 in the bristles 50 are arranged at intervals, and present different densities in different areas according to the number of hair bundles 5111 per unit area. The interval arrangement of the hair bundles 5111 means that there is a certain distance between the hair bundles 5111, and the distances between the hair bundles 5111 can be the same, partially the same, or completely different. For example, the bristles 50 include two brush filament groups 51, and since adjacent brush filament groups 51 are arranged at intervals, there is a certain gap between adjacent brush filament groups 51. It can be understood that the hair bundles 5111 are not distributed in the gap.

[0120] The density of the bristles 5111 distributed in the brush filament group 51 refers to the ratio of the total cross-sectional area (cross-sectional area cut by the XY plane) of the bristles 5111 in the brush filament group 51 to the area of ​​the bristle implantation surface 311 of the bristle implantation portion 31 where the brush filament group 51 is located. The density of the bristles 5111 in the bristles 50 refers to the ratio of the total cross-sectional area of ​​all the bristles 5111 on the brush body 30 to the area of ​​the outer contour of the brush body 30.

[0121] The density of the hair bundles 5111 in any brush filament group 51 is greater than the density of the hair bundles 5111 in the bristles 50, which can more effectively transmit vibration to the tooth surface to loosen dental plaque when the electric toothbrush head 100 vibrates, thereby improving the cleaning ability of any brush filament group 51 (local area). The density of the hair bundles 5111 in the bristles 50 is less than the density of the hair bundles 5111 in any brush filament group 51, which can ensure the cleaning effect of any brush filament group 51 while avoiding excessive pressure and excessive stimulation on the teeth and gums due to the excessive density of the hair bundles 5111 in the bristles 50 (the hair bundle density in the overall area), thereby reducing possible damage to the teeth and gums.

[0122] See also Figure 1 , Figure 4 , Fig.13 and Fig.16 In some embodiments, at least a portion of the hair bundles 5111 have sharp corners in cross-section.

[0123] Specifically, the cross section of the bristle bundle 5111 refers to the cross section of the bristle bundle 5111 cut by the XY plane. The cross section of the bristle bundle 5111 can be in various shapes such as ellipse, circle, or square, which is not limited in the present application. The sharp corner (not shown) represents that the cross section can be a shape such as a triangle and a rhombus containing at least one angle. In the same brush filament group 51, the shapes of the cross sections of different bristle bundles 5111 can be the same or different. For example, in the same brush filament group 511, the bristle bundles 5111 have two cross-sectional shapes such as a circle and a rounded rectangle. The same brush filament group 511 has 5 bristle bundles 5111 with a circular cross-sectional shape, and 2 bristle bundles 5111 with a rounded rectangle cross-sectional shape. The arrangement of the two bristle bundles 5111 with different cross-sectional shapes is a mixed distribution. In other embodiments of the present application, in the same brush filament group 51, the spacing between the bristle bundles 5111, the shape of the cross section of the bristle bundles 5111, and the number of bristle bundles 5111 can have a variety of permutations and combinations.

[0124] The bristle bundle 5111 with a pointed cross-section has a small cross-sectional area. When the electric toothbrush head 100 vibrates, it can more easily embed into the gap between the plaque and the teeth, and can increase the contact length between the bristle bundle 5111 and the teeth, which helps to more effectively loosen the plaque on the tooth surface and remove the loosened plaque.

[0125] Please continue reading Figure 1 , Figure 4 , Fig.13 and Fig.16 In some embodiments, the cross-section of the bristle bundle 5111 in the area near the edge of the brush filament group 51 has a sharp corner.

[0126] Specifically, the hair bundles 5111 in the area near the edge of the brush filament group 51 include: the hair bundles 5111 in the brush filament group 51 near the gap between adjacent brush filament groups 51, and the hair bundles 5111 near the outer contour of the brush body 30. The hair bundles 5111 in the area near the edge of the brush filament group 51 have a higher degree of freedom. When the electric toothbrush 100 vibrates, the hair bundles 5111 with sharp corners in the cross section can be more easily embedded in the gap between the plaque and the teeth, reducing the possibility of plaque reattaching to the tooth surface, and improving the stripping effect of the hair bundles 5111 in the area near the edge of the brush filament group 51 on the plaque.

[0127] See also Figure 1 , Figure 2 , Fig.13 and Fig.14 In some embodiments, the brush filament group 51 includes a middle area A and an edge area C surrounding the middle area, and at least part of the bristle bundles 5111 in the edge area of ​​at least part of the brush filament group 51 are higher than the bristle bundles 5111 in the middle area.

[0128] Specifically, the middle area of ​​the brush filament group 51 is the area relatively located at the center of the brush filament group 51 in the XY projection plane. The edge area of ​​the brush filament group 51 is the area surrounding the middle area in the XY projection plane. In the XY or XZ projection plane, the two ends of the middle area A are edge areas C. At least part of the hair bundles 5111 in the edge area of ​​at least part of the brush filament group 51 are higher than the hair bundles 5111 in the middle area, which means: if there are two brush filament groups 51, then in the edge area of ​​one of the brush filament groups 51, all the hair bundles 5111 may be higher than the hair bundles 5111 in the middle area, or at least one hair bundle 5111 in the edge area may be higher than the hair bundles 5111 in the middle area, and other hair bundles 5111 in the edge area may be lower than or equal to the hair bundles 5111 in the middle area. As for the height design of the hair bundles 5111 in the other brush filament group 51 of the two brush filament groups 51, it can be arbitrarily designed, and can be the same as that in the one brush filament group 51, or it can be different from that in the one brush filament group 51, which is not limited here. Preferably, all the hair bundles 5111 in the edge region C are taller than any hair bundle 5111 in the middle region A.

[0129] In the thickness direction Z, at least part of the hair bundles in the edge region C of the same brush filament group 51 are higher than the hair bundles 5111 in the middle region A, so that the contact area between the hair bundles 5111 in the middle region A and the tooth surface is larger, and the hair bundles 5111 in the middle region A fit the tooth surface better, thereby better transmitting the vibration brought by the motor to the rod body 10. The hair bundles 5111 in the edge region C are higher and have a larger degree of freedom, and the deformation amplitude is higher than the hair bundles 5111 in the middle region A. Therefore, the hair bundles 5111 in the edge region C can have a larger coverage area when following the swing of the brush body 30, and even if the bristles 50 deviate at a larger angle due to following the swing of the brush body 30, they can still maintain fit with the tooth surface, thereby improving the cleaning effect.

[0130] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig. 9 and Fig.10 In some embodiments, in the length direction X of the brush body 30 from close to the rod body 10 to far away from the rod body 10, the bristles 50 include a proximal brush filament group 511 and a distal brush filament group 513 arranged in sequence. The bristle bundles 5111 of the proximal brush filament group 511 are more than the bristle bundles 5111 of the distal brush filament group 513. The minimum spacing between the bristle bundles 5111 of the proximal brush filament group 51 and the bristle bundles 5111 of the distal brush filament group 513 is at least greater than the spacing between adjacent bristle bundles 5111 in the proximal brush filament group 511.

[0131] Specifically, in some embodiments of the present application, the proximal brush filament group 511 has 17 bristle bundles 5111, and the distal brush filament group 531 has 7 bristle bundles 5111. In other embodiments, the number of bristle bundles 5111 is not limited. It is understood that the spacing between the bristle bundles 5111 is the distance between the bristle bundles 5111.

[0132] The minimum spacing between the bristles of the proximal brush filament group 511 and the bristles 5111 of the distal brush filament group 513 refers to: assuming that the bristles 51115, 51116, 51117 and 51118 in the proximal brush filament group 511 are several bristles close to the distal brush filament group 513, and the bristles 51111, 51112, 51113 and 51114 in the distal brush filament group 513 are several bristles close to the distal brush filament group 513, find out the spacings S51, S52, S53 and S54 between the bristles 51115 and the bristles 51111, 51112, 51113 and 51114; find out the spacings S51, S52, S53 and S54 between the bristles 51116 and the bristles 51111, 51112, 51113 and 51114. 4; find out the spacing S61, S62, S63 and S64 between the bristle bundles 51117 and the bristle bundles 51111, 51112, 51113 and 51114; find out the spacing S81, S82, S83 and S84 between the bristle bundles 51118 and the bristle bundles 51111, 51112, 51113 and 51114; then the minimum value among the spacings S51, S52, S53, S54, S61, S62, S63, S64, S71, S72, S73, S74, S81, S82, S83 and S84 is the minimum spacing Smin between the bristle bundles 5111 of the proximal brush filament group 511 and the bristle bundles 5111 of the distal brush filament group 513.

[0133] The spacing between adjacent bristle bundles 5111 in the proximal brush filament group 511 refers to: taking bristle bundle 51118 as an example, bristle bundle 51117 and bristle bundle 51119 are both adjacent to bristle bundle 51118, the spacing between bristle bundle 51118 and bristle bundle 51117 is L87, and the spacing between bristle bundle 51118 and bristle bundle 51119 is L89; traverse all bristle bundles 5111 in the proximal brush filament group 511 to find the spacing Li between each bristle bundle 5111 and its adjacent bristle bundle 5111.

[0134] The minimum spacing between the bristle bundles 5111 of the proximal brush filament group 511 and the bristle bundles 5111 of the distal brush filament group 513 is at least greater than the spacing between adjacent bristle bundles in the proximal brush filament group 511, including: Smin>L 511i , where L 511i is the distance between any two adjacent hair bundles 5111 in the proximal brush filament group 511. At this time, Smin<L 513i , or Smin ≥ L 513i , where L 513i It is the distance between any two adjacent bristle bundles 5111 in the distal brush filament group 513 .

[0135] The proximal brush filament group 511 is connected to the rod body 10, which can enhance the connection stability between the proximal brush filament group 511 and the rod body 10 and make the vibration transmission more stable. At the same time, the proximal brush filament group 511 has a larger contact area with the oral cavity than the distal brush filament group 513, and the relatively more hair bundles 5111 can more easily loosen the dental plaque in the oral cavity. The distal brush filament group 513 is far away from the rod body 10 and has better freedom when vibrating. At the same time, the relatively fewer hair bundles 5111 of the distal brush filament group 513 can further improve the freedom of the distal brush filament group 513 when the electric toothbrush head 100 vibrates, and enhance the peeling effect of loose dental plaque. On the other hand, fewer hair bundles 5111 can reduce the foreign body sensation of the distal brush filament group 513 when it goes deep into the oral cavity, and enhance the mobility of the distal brush filament group 513 inside the oral cavity, making it easier to clean the difficult-to-clean areas at the back of the oral cavity. The spacing between adjacent brush filament groups 51 is greater than the spacing between adjacent bristle bundles in the proximal brush filament group 511, so that the bristle bundles 5111 near the edge area C in the brush filament group 51 around the gap between the proximal brush filament group 511 and the distal brush filament group 513 have better freedom. When the electric toothbrush head 100 vibrates, the relatively large spacing allows the bristle bundles 5111 to have more space to swing and produce a better amplitude during vibration, thereby having a better peeling effect on loose plaque.

[0136] See also Fig.13 , Fig.14 , Fig.15 , Fig.16 , Fig.21 and Fig. 22In some embodiments, in the length direction X of the brush body 30 from close to the rod body 10 to far away from the rod body 10, the bristles 50 include a proximal brush filament group 511, an intermediate brush filament group 515, and a distal brush filament group 513 arranged in sequence. The bristle bundles 5111 of the intermediate brush filament group 515 are more than the bristle bundles 5111 of the proximal brush filament group 511 and the bristle bundles 5111 of the distal brush filament group 513. The minimum spacing between the bristle bundles 5111 of adjacent brush filament groups 51 is at least greater than the spacing between adjacent bristle bundles 5111 in the intermediate brush filament group 515.

[0137] The minimum spacing between the bristle bundles 5111 of adjacent brush filament groups 51 is at least greater than the spacing between adjacent bristle bundles 5111 in the middle brush filament group 515, including: the minimum spacing between the bristle bundles 5111 of the proximal brush filament group 511 and the bristle bundles 5111 of the middle brush filament group 515 is at least greater than the spacing between adjacent bristle bundles 5111 in the middle brush filament group 515; and / or, the minimum spacing between the bristle bundles 5111 of the distal brush filament group 513 and the bristle bundles 5111 of the middle brush filament group 515 is at least greater than the spacing between adjacent bristle bundles 5111 in the middle brush filament group 515.

[0138] Specifically, in the embodiment of the present application, the proximal brush filament group 511 includes 5 tufts 5111, namely, tuft A, tuft B, tuft C, tuft D and tuft E. The middle brush filament group 515 includes 13 tufts 5111, and the tufts in the edge area C are tufts 1, tuft 2, tuft 3, tuft 4, tuft 5, tuft 6, tuft 7 and tuft 8. The remaining five tufts 5111 surrounded by the eight tufts 5111 are in the middle area A. The distal brush filament group 513 includes 4 tufts 5111, namely, tuft F, tuft G, tuft H and tuft I. The middle brush filament group 515 is adjacent to both the proximal brush filament group 511 and the distal brush filament group 513. For tuft 1 in the middle brush filament group 515, tuft 1 is adjacent to tufts F, tuft G and tuft H in the distal brush filament group 513.

[0139] The minimum spacing between the bristle bundle 5111 of the proximal brush filament group 511 and the bristle bundle 5111 of the middle brush filament group 515 means: assuming that bristle bundles A, B and C in the proximal brush filament group 511 are several bristle bundles close to the middle brush filament group 515, and bristle bundles 4, 5, and 6 in the middle brush filament group 515 are several bristle bundles close to the proximal brush filament group 511, find out the spacings SA4, SA5 and SA6 between bristle bundle A and bristle bundles 4, 5 and 6; find Find the distances SB4, SB5 and SB6 between bristle bundle B and bristle bundle 4, bristle bundle 5 and bristle bundle 6; find the distances SC4, SC5 and SC6 between bristle bundle C and bristle bundle 4, bristle bundle 5 and bristle bundle 6; then the minimum value of the distances SA4, SA5, SA6, SB4, SB5, SB6, SC4, SC5 and SC6 is the minimum distance Smin1 between the bristle bundle 5111 of the proximal brush filament group 511 and the bristle bundle 5111 of the middle brush filament group 515.

[0140] The spacing between adjacent bristle bundles 5111 in the proximal brush filament group 511 refers to: taking bristle bundle A as an example, bristle bundle B and bristle bundle D are both adjacent to bristle bundle A, the spacing between bristle bundle A and bristle bundle D is LAD, and the spacing between bristle bundle A and bristle bundle B is LAB; traverse all bristle bundles 5111 in the proximal brush filament group 511 to find the spacing Li between each bristle bundle 5111 and its adjacent bristle bundle 5111.

[0141] The minimum spacing between the bristle bundles 5111 of the proximal brush filament group 511 and the bristle bundles 5111 of the middle brush filament group 515 is at least greater than the spacing between adjacent bristle bundles 5111 in the proximal brush filament group 511, including: Smin1>L 511i , where L 511i is the distance between any two adjacent hair bundles 5111 in the proximal brush filament group 511. At this time, Smin1<L 515i , or Smin1 ≥ L 515i , where L 515i It is the distance between any two adjacent bristle bundles 5111 in the middle brush filament group 515 .

[0142] The minimum spacing between the hair bundles 5111 of the distal brush filament group 513 and the hair bundles 5111 of the middle brush filament group 515 means: assuming that the hair bundles F, G and H in the distal brush filament group 513 are several hair bundles close to the middle brush filament group 515, and the hair bundles 1, 2 and 3 in the middle brush filament group 515 are several hair bundles close to the distal brush filament group 513, find the spacings SF1, SF2 and SF3 between the hair bundle F and the hair bundles 1, 2 and 3; find Find the distances SG1, SG2 and SG3 between the bristle bundle G and the bristle bundle 1, bristle bundle 2 and bristle bundle 3; find the distances SH1, SH2 and SH3 between the bristle bundle H and the bristle bundle 1, bristle bundle 2 and bristle bundle 3; then the minimum value of the distances SF1, SF2, SF3, SG1, SG2, SG3, SH1, SH2 and SH3 is the minimum distance Smin2 between the bristle bundle 5111 of the distal brush filament group 513 and the bristle bundle 5111 of the middle brush filament group 515.

[0143] The spacing between adjacent bristle bundles 5111 in the distal brush filament group 513 refers to: taking bristle bundle F as an example, bristle bundle G and bristle bundle I are both adjacent to bristle bundle F, the spacing between bristle bundle F and bristle bundle I is LFI, and the spacing between bristle bundle F and bristle bundle G is LFG; traverse all bristle bundles 5111 in the distal brush filament group 513 to find the spacing Lj between each bristle bundle 5111 and its adjacent bristle bundle 5111.

[0144] The minimum spacing between the bristle bundles 5111 of the distal brush filament group 513 and the bristle bundles 5111 of the intermediate brush filament group 515 is at least greater than the spacing between adjacent bristle bundles 5111 in the distal brush filament group 513, including: Smin2>L 513j , where L511i is the distance between any two adjacent hair bundles 5111 in the distal brush filament group 513. At this time, Smin2<L 515j , or Smin2 ≥ L 515j , where L 515i It is the distance between any two adjacent bristle bundles 5111 in the middle brush filament group 515 .

[0145] The middle brush wire group 515 has the most hair bundles 5111, which can maximize the contact area between the middle brush wire group 515 and the oral cavity, and use the pressure transmitted from the oral cavity to the middle brush wire group 515 to make the middle brush wire group 515 fit the oral cavity more closely, making it easier to loosen the dental plaque in the oral cavity. The minimum spacing between the hair bundles 5111 of the distal brush wire group 513 and the hair bundles 5111 of the middle brush wire group 515, as well as the minimum spacing between the hair bundles 5111 of the proximal brush wire group 511 and the hair bundles 5111 of the middle brush wire group 515, are both greater than the spacing between adjacent hair bundles 5111 in the middle brush wire group 515, which can allow the hair bundles 5111 around the gap between the proximal brush wire group 511 and the middle brush wire group 515, as well as the hair bundles 5111 around the gap between the distal brush wire group 513 and the middle brush wire group 515 to have greater freedom, which is more conducive to peeling the dental plaque loosened by the middle brush wire group 515 from the teeth.

[0146] See also Fig. 9 , Fig.10 , Fig.11 , Fig.21 , Fig. 22 and Fig.23 In some embodiments, there is one implanted hair portion 31, and a plurality of brush filament groups 51 are all located on the implanted hair portion 31. When the bristles 50 and / or the implanted hair portion 31 are subjected to force, the brush body 30 is deformed as a whole.

[0147] In one embodiment, when there are two brush filament groups 51 (the proximal brush filament group 511 and the distal brush filament group 513) on one implanted hair portion 31, in the length direction X, the pressure on the brush body 30 from the P end close to the rod body 10 to the Q end is uniform, such as Figure 10 to Figure 11 As shown, the P end is the end of the brush body 30 close to the rod body 10, and the Q end is the end of the brush body 30 away from the rod body 10; Fig.10 The hair implantation portion 31 in the electric toothbrush head 100 is one and is not deformed; Fig.11 for Fig.10 The state when the hair implantation portion 31 in the figure is uniformly deformed.

[0148] In another embodiment, when there are three brush wire groups 51 (proximal brush wire group 511, middle brush wire group 515 and distal brush wire group 513) on a bristle implantation portion 31, the pressure on the brush body 30 from the P end to the Q end in the length direction X is also uniform. Figure 22 to Figure 23As shown, Fig. 22 The hair implantation portion 31 in the electric toothbrush head 100 is one and is not deformed; Fig.23 for Fig. 22 The state when the hair implantation portion 31 in the figure is uniformly deformed.

[0149] The overall deformed brush body 30 can evenly disperse the pressure transmitted to the brush body 30 by the part to be cared for, making the contact between the bristles 50 and the tooth surface more uniform and close, avoiding excessive pressure in a local area, and causing damage to the bristles 50 and / or the implanted hair part 31 in the area. The overall deformed brush body 30 can also evenly transmit the vibration of the electric toothbrush head 100 to the tooth surface, thereby loosening and peeling off dental plaque.

[0150] See also Fig. 9 , Fig.10 , Fig.12 , Fig.21 , Fig. 22 and Fig.23 In some embodiments, the implanted hair part 31 is one. A plurality of brush filament groups 51 are located on the implanted hair part 31. The implanted hair part 31 includes a plurality of regions, each of which is provided with a brush filament group 51. When the bristles 50 and / or the implanted hair part 31 are subjected to force, at least one of the plurality of regions of the implanted hair part 31 is deformed.

[0151] Specifically, in one implementation, see Fig.10 and Fig.12 When there are two brush filament groups 51 (proximal brush filament group 511 and distal brush filament group 513) on a hair implantation portion 31, when the bristles 50 and / or the hair implantation portion 31 are subjected to force, it is possible that the proximal brush filament group 511 is deformed, it is also possible that the distal brush filament group 513 is deformed, or it is also possible that both the proximal brush filament group 511 and the distal brush filament group 513 are deformed. When more than one brush filament group 51 is deformed, the amplitudes of the deformation of different brush filament groups 51 may be consistent or inconsistent. This embodiment only shows the case where the distal brush filament group 513 is deformed while the proximal brush filament group 511 is not deformed. It can be understood that in the length direction X, the distal brush filament group 513 follows the brush body 30 from the Q end to the middle end O, while the proximal brush filament group 511 follows the P end of the brush body 30 to the middle end O without deformation, wherein the middle end O here is in the middle position of the gap between the proximal brush filament group 511 and the distal brush filament group 513.

[0152] In another embodiment, see 22 and Fig.24When there are three brush filament groups 51 (proximal brush filament group 511, middle brush filament group 515 and distal brush filament group 513) on a hair implanting portion 31, when the bristles 50 and / or the hair implanting portion 31 are subjected to force, it is possible that the proximal brush filament group 511 is deformed, the distal brush filament group 513 is deformed, the middle brush filament group 515 is deformed, or the three brush filament groups 51 are deformed in pairs (such as the middle brush filament group 515 and the distal brush filament group 513 are deformed), or the proximal brush filament group 511, the middle brush filament group 515 and the distal brush filament group 513 are all deformed. When more than one brush filament group 51 is deformed, the deformation amplitudes of different brush filament groups 51 may be consistent or inconsistent. This embodiment only shows the situation where only the distal brush filament group 513 is deformed, while the middle brush filament group 515 and the proximal brush filament group 511 are not deformed. It can be understood that when the bristles 50 and / or the implanted hair portion 31 are under force, in the length direction X, the distal brush filament group 513 follows the brush body 30 from the Q end to the middle end O, while the proximal brush filament group 511 follows the P end of the brush body 30 to the middle end O without being deformed, wherein the middle end O here is in the middle position of the gap between the middle brush filament group 515 and the distal brush filament group 513.

[0153] At least one of the multiple areas of the implanted hair portion 31 is deformed, so that the multiple areas of the implanted hair portion 31 can adapt to different tooth surface structures, so that the bristles 50 on the brush wire group 51 can fit the tooth surfaces with different contours, ensuring the transmission of vibration energy of the electric toothbrush head 100, thereby enhancing the cleaning effect.

[0154] See also Figure 4 and Fig.16 In some embodiments, there are at least two hair-implanted portions 31. The brush body 30 also includes at least one connecting portion 33. In the length direction X of the rod body 10, at least two hair-implanted portions 31 are arranged in sequence. The connecting portion is arranged in the interval between two adjacent hair-implanted portions 31 and is used to connect the two adjacent hair-implanted portions 31. When the bristles 50 and / or the hair-implanted portions 31 are subjected to force, at least one connecting portion is deformed to drive at least one of the multiple hair-implanted portions 31 to deform.

[0155] See also Figure 3 , Figure 4 and Figure 5 In the embodiment where there are two hair-planting parts 31 on the brush body 30, the hair-planting parts 31 include a first hair-planting part 311 and a second hair-planting part 313. The first hair-planting part 311 is provided with a proximal brush filament group 511, and the second hair-planting part 313 is provided with a distal brush filament group 513. The number of hair bundles 5111 on the brush filament group 51 can be 4, 8, or 12, etc., which is not limited here. Figure 2In the illustrated embodiment, the proximal brush filament group 511 has 7 bristle bundles 5111, and the distal brush filament group 513 has multiple bristle bundles 5111. Since there is a gap between the first implanted hair portion 311 and the second implanted hair portion 313, there is also a gap between the proximal brush filament group 511 and the distal brush filament group 513. The deformation of at least one of the multiple implanted hair portions 31 may be the deformation of the first implanted hair portion 311, the deformation of the second implanted hair portion 313, or the deformation of both.

[0156] See also Fig.15 , Fig.16 and Fig.17 In an embodiment where there are three hair-planting parts 31 on the brush body 30, the hair-planting parts 31 include a first hair-planting part 311, a second hair-planting part 313 and a third hair-planting part 315. A proximal brush filament group 511 is provided on the first hair-planting part 311, a distal brush filament group 513 is provided on the second hair-planting part 313, and a mid-end brush filament group 515 is provided on the third hair-planting part 315. There is a certain gap between adjacent brush filament groups 51 in the three brush filament groups 51. The spaced arrangement of the brush filament groups 51 can correspond to different areas in the oral cavity, so that the electric toothbrush head 100 can cover different areas in the oral cavity when in use, thereby improving the cleaning efficiency. At the same time, the brush filament groups 51 arranged at intervals can form multiple points of force in the oral cavity, so that the part of the oral cavity in contact with the brush filament group 51 is evenly stressed, thereby avoiding a single point of force from causing excessive pressure on the oral cavity.

[0157] See also Figure 1 , Figure 4 , Fig.13 and Fig.16 In some embodiments, the distance between the bristle bundles 5111 of adjacent brush filament groups 51 satisfies: when the brush body 30 is deformed to the maximum from the side where the bristle implantation surface 301 is located toward the side where the back surface 305 is located, the length of the bristle bundles 5111 of adjacent brush filament groups 51 that abut each other is not greater than 1 / 3 of any adjacent bristle bundles 5111 in the adjacent brush filament groups 51.

[0158] The length of the hair bundles 5111 of adjacent brush filament groups 51 abutting against each other can be 0, 1 / 19, 1 / 17, 1 / 15, 1 / 13, 1 / 11, 1 / 9, 1 / 7, 1 / 6, 1 / 5, 1 / 4 or 1 / 3. When the length of the hair bundles 5111 of adjacent brush filament groups 51 abutting against each other is greater than 1 / 3 of any adjacent hair bundles 5111 in the adjacent brush filament groups 51, the abutting length of the hair bundles 5111 is too large. On the one hand, the hair bundles 5111 will be entangled and blocked with each other during the cleaning process, reducing the cleaning efficiency of a single hair bundle 5111. On the other hand, the brush filament group 51 will be deformed when subjected to force, damaging the bristles 50 and affecting the life of the electric toothbrush head 100. When the length of the bristle bundles 5111 of adjacent bristle groups 51 that abut against each other is less than 1 / 3, there is a certain distance between the bristle bundles 5111, and a single bristle bundle 5111 has a larger range of movement and cleaning range, which improves the cleaning efficiency of the bristle group 51. In addition, the length of the abutment is less than 1 / 3 of the length of any bristle bundle, which can reduce the friction and wear between different bristle bundles 5111 and extend the service life of the electric toothbrush head 100.

[0159] See also Figure 1 , Figure 4 , Fig.13 and Fig.16 In some embodiments, the minimum spacing between the bristle bundles 5111 between adjacent brush filament groups 51 ranges from [1.5 mm, 4.0 mm].

[0160] The value of the minimum spacing between the bristle bundles 5111 between adjacent brush filament groups 51 can be 1.5mm, 1.8mm, 2.1mm, 2.4mm, 2.8mm, 3.0mm, 3.1mm, 3.2mm, 3.3mm, 3.5mm, 3.8mm or 4.0mm. When the minimum spacing between the bristle bundles 5111 of adjacent brush filament groups 51 is less than 1.5mm, the bristle bundles 5111 between adjacent brush filament groups 51 will interfere with each other, affecting the flexibility of a single bristle bundle 5111 during cleaning and reducing the cleaning efficiency of the brush filament group 51. At the same time, too small a spacing between the bristle bundles 5111 will make the brush filament group 51 too compact. When the electric toothbrush head 100 is working, the bristle bundles 5111 will give greater pressure to the part to be cared for, causing physiological discomfort to the user. Since different brush filament groups 51 cover different areas of the oral cavity, the gaps between the brush filament groups 51 correspond to the area of ​​the oral cavity, and the brush filament group 51 located around the gaps needs to be bent and deformed to cover and clean the area of ​​the oral cavity corresponding to the gaps. When the minimum spacing between the bristles 5111 of adjacent brush filament groups 51 is greater than 4.0 mm, the spacing between the bristles 5111 of the brush filament groups 51 will be too large, and the electric toothbrush head 100 will not be able to cover all areas of the oral cavity. When the minimum spacing between the bristles 5111 of adjacent brush filament groups 51 is in the range of [1.5 mm, 4.0 mm], the bristles 5111 between adjacent brush filament groups 51 will not interfere with each other, and a single bristle 5111 is flexible during cleaning. The area of ​​the oral cavity corresponding to the gap between the brush filament groups 51 can be covered and cleaned by the brush filament groups 51 around the gap after bending and deforming.

[0161] See also Figure 3 and Fig.15 Specifically, the hair-planting portion 31 also includes a back side 305 opposite to the hair-planting surface 301, and the deformation of the connecting portion 33 can drive the brush body 30 to bend and deform toward the side where the hair-planting surface 301 is located and toward the side where the back side 305 is located. The peripheral side surface 303 of the hair-planting portion 31 is arranged between 5 and connects the hair-planting surface 301 and the back side 30.

[0162] Please continue reading Figure 3 and Fig.15 In some embodiments, in the thickness direction Z of the brush body 30, the brush body 30 can be bent and deformed in two directions, toward the hair-planting surface 301 and the back side 305, so as to have a larger deformation angle. The direction in which the brush body 30 is bent and deformed toward the hair-planting surface 301 is the direction in which the bristles 50 are away from each other in the thickness direction Z of the brush body 30 (that is, the brush body 30 is deformed outward), and at this time, the brush body 30 protrudes from the back side 305 toward the hair-planting surface 301. The direction in which the brush body 30 is bent and deformed toward the back side 305 is the direction in which the bristles 50 are close to each other in the thickness direction Z of the brush body 30 (that is, the brush body 30 is deformed inward), and at this time, the brush body 30 protrudes from the hair-planting surface 301 toward the back side 305.

[0163] Please continue reading Figure 3 and Fig.21 In some embodiments, the amount of bendability of the brush body 30 toward the side where the hair-planting surface 301 is located is less than the amount of bendability of the brush body 30 toward the side where the back surface 305 is located.

[0164] The bendability refers to the maximum degree of bending or bending range that the brush body 30 can withstand when deformed by external force, and can be measured by the curve radius of the outer contour of the brush body 30 after bending and deformation. Generally, the larger the curve radius, the smaller the bendability, and the smaller the curve radius, the greater the bendability. When deformed by external force, the pressure on the bristles 50 and the hair-planting part 31 from the side of the to-be-care part facing the back side 305 is usually greater than the pressure on the side facing the hair-planting surface 301. Therefore, the bendability of the brush body 30 for bending (convex) deformation toward the side where the back side 305 is located is greater than the bendability for bending (convex) deformation toward the side where the hair-planting surface 301 is located, so that the brush body 30 can withstand pressures of different directions and sizes and transmit different vibration amplitudes. The bending deformation of the brush body 30 toward the bristle-implanted surface 301 is smaller, which can ensure that the bristles 50 fit the tooth surface. The bending deformation of the brush body 30 toward the back side 305 is larger, which can allow the brush body 30 to absorb and disperse the pressure on the part to be cared for, reduce the direct impact on the part to be cared for, and thus adapt to different oral care needs.

[0165] See also Figure 5 , Figure 6 , Figure 8 , Fig.17 , Fig.18 and Fig. 20 In some embodiments, the hair implantation portion 31 includes a hair implantation sheet 317 and a reinforcing protrusion 319. The hair implantation sheet 317 includes a hair implantation surface 301 and a rear surface 3171 opposite to each other. The hair implantation surface 301 and the rear surface 3171 are two surfaces of the hair implantation sheet 317 opposite to each other in the thickness direction Z. The reinforcing protrusion 319 is arranged on the rear surface 3171, and is used to strengthen the strength of the hair implantation portion 31. The reinforcing protrusion 319 may completely cover the rear surface 3171, or may not completely cover the rear surface 3171, or may have a certain extension in the direction of the plane where the rear surface 3171 is located compared to the rear surface 3171. When the hair implantation portion 31 is deformed, the reinforcing protrusion 319 can support one side of the rear surface 3171 of the hair implantation portion 31, thereby improving the strength of the hair implantation portion 31 and preventing the hair implantation portion 31 from breaking. Furthermore, the reinforcing protrusion 319 can provide stress support around the hair implanting hole 3011 to prevent the hair implanting part 31 from breaking due to excessive squeezing of the hair implanting hole 3011 by the copper sheet when the bristles 50 are fixed in the hair implanting hole 3011 by the copper sheet.

[0166] See also Figure 6 , Figure 8 , Fig.18 and Fig. 20 Specifically, in some embodiments, in the direction from the hair-planting surface 301 to the rear surface 3171 , the cross-section of the reinforcing protrusion 319 cut by a plane perpendicular to the thickness direction Z of the brush body 30 gradually decreases.

[0167] For the directly adopted thicker implanted hair portion 31, the plane of the reinforcing protrusion 319 along the thickness direction Z gradually decreases, which can reduce the volume of the electric toothbrush head 100, reduce the foreign body sensation, and improve the mobility of the electric toothbrush head 100 in the oral cavity.

[0168] See also Figure 5 , Figure 6 , Figure 8 , Fig.17 , Fig.18 and Fig. 20 The hair implanting piece 317 is a component for connecting the bristles 50. Each hair implanting piece 317 is roughly a block structure. The shape of the cross section of the hair implanting piece 317 cut by the XY plane can be the same or different, and there is no limitation here. Each hair implanting piece 317 is provided with a hair implanting hole 3011, and bristles 50 are provided in the hair implanting hole 3011 corresponding to each hair implanting piece 317. There is a gap between adjacent hair implanting pieces 317. The connecting portion 33 connects adjacent hair implanting pieces 317. When the hair implanting portion 31 is subjected to force, the connecting portion 33 is bent by the force so that the spacing of the gap between each adjacent hair implanting piece 317 changes.

[0169] The hair implantation hole 3011 is an opening on the hair implantation part 31 for installing the bristles 50. The hair implantation hole 3011 can be formed through the hair implantation part 31, or can be formed by being recessed from the hair implantation surface 301 of the hair implantation part 31 to the back surface 305.

[0170] See also Figure 5 and Fig.17 Specifically, in some embodiments, the hair-implanting hole 3011 is a blind hole, and the bristles 50 are fixed in the hair-implanting hole 3011 by a copper sheet. The blind hole means that the hair-implanting hole 3011 does not penetrate the hair-implanting sheet 317, which can reduce the possibility of the hair-implanting sheet 317 breaking along the hair-implanting hole 3011 in the thickness direction Z. The bristles 50 are fixed in the hair-implanting hole 3011 by a copper sheet, and the copper sheet can provide additional support to the part of the bristles 50 inside the hair-implanting hole 3011, thereby reducing the pressure and friction on the bristles 50 in the hair-implanting hole 3011. In other embodiments of the present application, the hair-implanting hole 3011 can be a through hole, and after the bristles 50 penetrate the through hole from the hair-implanting surface 301, they can be fixed to the back side 305 by gluing or fusion.

[0171] See also Figure 3 , Figure 4 and Figure 5Further, in some embodiments, the brush body 30 includes two hair-planting parts 31, namely a first hair-planting part 311 connected to the rod body 10 and a second hair-planting part 313 farthest from the rod body 10 in the length direction X of the rod body 10. The area of ​​the hair-planting surface 301 of the first hair-planting part 311 is larger than the area of ​​the hair-planting surface 301 of the second hair-planting part 313.

[0172] On the one hand, the connection between the first hair-planting part 311 and the rod body 10 can enhance the support of the first hair-planting part 311 and ensure that the first hair-planting part 311 fits better with the teeth. The second hair-planting part 313 is away from the rod body 10 and is connected to the first hair-planting part 311 through the connecting part 33. Since the connecting part 33 is deformable, the second hair-planting part 313 can have a larger range of motion when the electric toothbrush head 100 vibrates, so as to contact different positions of the part to be cared for, so as to achieve cleaning of various positions of the oral cavity. On the other hand, when the electric toothbrush head 100 is working, the first hair-planting part 311 has a larger contact area with the oral cavity than the second hair-planting part 313. Therefore, the area of ​​the first hair-planting part 311 is designed to be larger, which is conducive to improving the efficiency of oral cleaning. The second hair-planting part 313 is usually closer to the inside of the oral cavity than the first hair-planting part 311, and the area of ​​the second hair-planting part 313 is designed to be smaller, which can reduce the foreign body sensation in the oral cavity and improve the mobility of the electric toothbrush head 100 in the oral cavity.

[0173] See also Fig.15 , Fig.16 and Fig.17 In other embodiments, the brush body 30 includes three hair-planting parts 31, which are a first hair-planting part 311 connected to the rod body 10, a second hair-planting part 313 farthest from the rod body 10 in the length direction X of the rod body 10, and a third hair-planting part 315 located between the first hair-planting part 311 and the second hair-planting part 313. The area of ​​the hair-planting surface 301 of the third hair-planting part 315 is greater than the area of ​​the hair-planting surface 301 of the first hair-planting part 311, and the area of ​​the hair-planting surface 301 of the third hair-planting part 315 is greater than the area of ​​the hair-planting surface 301 of the second hair-planting part 313.

[0174] The connection between the first hair implantation portion 311 and the rod body 10 enhances the support of the first hair implantation portion 311. When the electric toothbrush head 100 is moved in the oral cavity, the first hair implantation portion 311 can be ensured to fit the teeth better. The second hair implantation portion 313 is farthest from the rod body 10 and is connected to the third hair implantation portion 315 through the connecting portion 33. Since the connecting portion 33 is deformable, the second hair implantation portion 313 can have a larger range of motion when vibrating, thereby contacting different positions of the oral cavity. When the bristles 50 are subjected to force and the connecting portion 33 is deformed, the first hair implantation portion 311 and the second hair implantation portion 313 can move in various directions away from the third hair implantation portion 315 with the third hair implantation portion 315 as the center, so that the bristles 50 provided on the third hair implantation portion 315 and the first hair implantation portion 311 and the second hair implantation portion 313 can contact different positions of the oral cavity to achieve cleaning of various positions of the oral cavity. It is understandable that in other embodiments of the present application, the brush body 30 may include 4, 5 or more hair-planting parts 31 .

[0175] See also Figure 4 and Figure 8 In some embodiments, the thickness of the first hair implantation portion 311 is greater than the thickness of the second hair implantation portion 313 .

[0176] Specifically, in the embodiment in which the brush body 30 includes three hair-planting parts 31, and in the embodiment in which the brush body 30 includes two hair-planting parts 31, the thickness of the first hair-planting part 311 is greater than the thickness of the second hair-planting part 313. The thicker thickness of the first hair-planting part 311 is conducive to improving the stability of the connection between the brush body 30 and the rod body 10, making the electric toothbrush head 100 better in support and more stable in vibration transmission, and making it easier to peel off the dental plaque in the oral cavity from the tooth surface. The second hair-planting part 313 away from the rod body 10 is thinner than the first hair-planting part 311, which can make the second hair-planting part 313 more swung under the drive of the connecting part 33, and the scraping range is wider, making it easier to remove the dental plaque peeled off the tooth surface.

[0177] See also Fig.16 In some embodiments, the thickness of the third hair implantation portion 315 is greater than the thickness of the first hair implantation portion 311 , and the thickness of the third hair implantation portion 315 is greater than the thickness of the second hair implantation portion 313 .

[0178] When the bristles 50 are stressed and the connecting portion 33 is deformed, the second implanted hair portion 313 goes deeper into the oral cavity, and the thinning thickness can reduce the foreign body sensation of the electric toothbrush head 100 extending into the oral cavity. The third implanted hair portion 315 has the largest thickness, which allows the third implanted hair portion 315 to contact the oral cavity wall surface preferentially in the thickness direction Z, and utilizes the pressure of the oral cavity wall surface to make the third implanted hair portion 315 fit the oral cavity more closely, thereby improving the cleaning effect of the third implanted hair portion 315.

[0179] See also Figure 3 , Figure 5 , Fig.15 and Fig.17 In some embodiments, the hardness of the hair implantation portion 31 is greater than that of the connection portion 33. The hair implantation portion 31 may be made of a material with a greater hardness than that of the connection portion 33.

[0180] The material of the implanted hair part 31 can also be the same as that of the connecting part 33, but due to reasons such as size and processing technology, the formed implanted hair part 31 is harder than the connecting part 33. The implanted hair part 31 with greater hardness has a better supporting effect on the bristles 50 in the implanted hair holes 3011, and can ensure that the vibration of the brush body 30 is transmitted to the oral cavity by the bristles 50. The connecting part 33 with less hardness can produce a larger deformation amplitude and drive the brush body 30 to produce a larger deformation amplitude, so that the brush body 30 and the tooth surface have a better fit effect. On the other hand, when the electric toothbrush head 100 vibrates, the deformation of the connecting part 33 with less hardness can make the adjacent implanted hair part 31 have a larger range of movement and cover a larger cleaning area. On the other hand, when the electric toothbrush head 100 falls, the brush body 30 is the part that is most likely to fall to the ground first. The connecting part 33 can provide the electric toothbrush head 100 with a larger deformation amplitude, so that the electric toothbrush head 100 has better anti-fall fracture characteristics.

[0181] See also Figure 3 , Figure 5 , Fig.15 and Fig.17 In some embodiments, along the thickness direction Z of the electric toothbrush head 100, the thickness of the connecting portion 33 is less than the thickness of the hair-implanting portion 31. The thickness of the connecting portion 33 refers to the distance between the two opposite side surfaces of the connecting portion 33 in the thickness direction Z. The thickness of the hair-implanting portion 31 refers to the distance between the hair-implanting surface 301 and the back surface 305 of the hair-implanting portion 31 in the thickness direction Z of the electric toothbrush head 100. In the case where the thickness of the connecting portion 33 is less than the thickness of the hair-implanting portion 31, the connecting portion 33 is more easily deformed under stress than the hair-implanting portion 31. In the case where there is a gap between adjacent hair-implanting portions 31, the hair-implanting portions 31 can move closer to and / or farther away from each other when the connecting portion 33 is deformed under stress, so that the bristles 50 on the hair-implanting portion 31 move to different positions, thereby improving the cleaning effect of the electric toothbrush head 100.

[0182] Please continue reading Figure 3 , Figure 5 , Fig.15 and Fig.17In some embodiments, the width of the hair-implanted portion 31 is greater than the width of the connecting portion 33. The width of the connecting portion 33 refers to the maximum spacing between the two opposite side surfaces of the connecting portion 33 in the width direction Y. The width of the hair-implanted portion 31 refers to the maximum spacing of the circumferential side portions along the width direction Y of the electric toothbrush head 100. In the case where the width of the hair-implanted portion 31 is greater than the width of the connecting portion 33, the connecting portion 33 is more likely to deform in the width direction Y when subjected to force than the hair-implanted portion 31. In the case where there are gaps between adjacent hair-implanted portions 31, the hair-implanted portions 31 can move closer to and / or farther away from each other when the connecting portion 33 is deformed under force, so that the bristles 50 on the hair-implanted portion 31 produce different vibration effects, thereby improving the cleaning effect of the electric toothbrush head 100.

[0183] Please continue reading Figure 3 , Figure 5 , Fig.15 and Fig.17 In some embodiments, the width of the connecting portion 33 is greater than the thickness of the connecting portion 33 .

[0184] When the width of the connecting portion 33 is greater than the thickness of the connecting portion 33, on the one hand, the connecting portion 33 can be more easily deformed in its own thickness direction Z when subjected to force, so that the bristles 50 on the implanted portion 31 produce different vibration effects, thereby improving the cleaning effect of the electric toothbrush head 100; on the other hand, the deformation of the connecting portion 33 is concentrated in the thickness direction Z, which can allow the connecting portion 33 to have better support in its own non-thickness direction Z, thereby avoiding separation of the connecting portion 33 when subjected to force, thereby causing damage to the electric toothbrush head 100.

[0185] See also Figure 5 , Figure 8 , Fig.17 and Fig. 20 In some embodiments, in the thickness direction Z of the brush body 30 , the connecting portion 33 does not extend beyond the hair-implanting surface 301 , that is, the two opposite side surfaces of the connecting portion 33 in the thickness direction Z are both located on the side of the hair-implanting surface 301 close to the back side 305 .

[0186] In other embodiments, in the thickness direction Z of the brush body 30, the connection portion 33 does not extend beyond the back surface 305, that is, the two opposite side surfaces of the connection portion 33 in the thickness direction Z are both located on the side of the back surface 305 close to the hair-planting surface 301. In still other embodiments, in the thickness direction Z of the brush body 30, the connection portion 33 does not extend beyond the hair-planting surface 301, and the connection portion 33 does not extend beyond the back surface 305. The connection portion 33 does not extend beyond the hair-planting surface 301, which allows the hair-planting surface 301 to bend (bulge) and deform toward the side where the hair-planting surface 301 is located in the thickness direction Z of the brush body 30, with better deformation space. The connection portion 33 does not extend beyond the hair-planting surface 301, which allows the back surface 305 to bend and deform toward the side where the hair-planting surface 301 is located in the thickness direction Z of the brush body 30, with better deformation space.

[0187] See also Figure 8 and Fig. 20 In some embodiments, in the thickness direction Z of the brush body 30 , the distance h1 between the connecting portion 33 and the hair-implanting surface 301 is greater than the distance h2 between the connecting portion 33 and the back surface 305 .

[0188] When the brush body 30 is deformed to convexly move from the side where the hair planting surface 301 is located toward the side where the back surface 305 is located, the connecting portion 33 is closer to the back surface 305 in the thickness direction Z, that is, h2

[0189] See also Figure 4 , Figure 8 , Fig.16 and Fig. 20 ​In some embodiments, in the length direction X of the brush body 30, the back side 305 is provided with a first notch 307 on the side close to the connecting portion 33. The first notch 307 may be one or more. In one embodiment, the back side 305 of the first hair-implanting portion 111 has a first notch 307 close to the back side 305 of the second hair-implanting portion 113, and the back side 305 of the second hair-implanting portion 113 has a first notch 307 close to the back side 305 of the first hair-implanting portion 111. In other embodiments, the back side 305 of the first hair-implanting portion 111 has a first notch 307 close to the back side 305 of the third hair-implanting portion 115, the back side 305 of the second hair-implanting portion 113 has a first notch 307 close to the back side 305 of the third hair-implanting portion 115, and the back side 305 of the third hair-implanting portion 111 has a first notch 307 close to the back side 305 of the second hair-implanting portion 113 and the back side 305 of the first hair-implanting portion 111. When the brush body 30 is convexly deformed from the side where the back surface 305 is located toward the side where the hair-implanted surface 301 is located, the first notch 307 reduces the volume of the back surface 305, provides an escape space when the back surfaces 305 of adjacent hair-implanted portions 31 are close to each other, and increases the deformation amount of the hair-implanted portion 31 when it is convexly deformed from the side where the back surface 305 is located toward the side where the hair-implanted surface 301 is located.

[0190] See also Figure 8 , Fig.12 , Fig.17 and Fig. 20 In some embodiments, a second notch 309 is formed between adjacent hair-implanting portions 31 in the length direction X of the brush body 30. The hair-implanting portion 31 is provided with a second notch 309 on a side close to the connecting portion 33. The second notch 309 may be one or more. In one embodiment, the hair-implanting surface 301 of the first hair-implanting portion 111 has a second notch 309 near the hair-implanting surface 301 of the second hair-implanting portion 113, and the hair-implanting surface 301 of the second hair-implanting portion 113 has a second notch 309 near the hair-implanting surface 301 of the first hair-implanting portion 111. In other embodiments, the hair implanting surface 301 of the first hair implanting portion 111 has a second notch 309 near the hair implanting surface 301 of the third hair implanting portion 115, the hair implanting surface 301 of the second hair implanting portion 113 has a second notch 309 near the hair implanting surface 301 of the third hair implanting portion 115, and the hair implanting surface 301 of the third hair implanting portion 111 has a second notch 309 near the hair implanting surface 301 of the second hair implanting portion 113 and the hair implanting surface 301 of the first hair implanting portion 111. The brush body 30 convexly deforms from the hair implanting surface 301 toward the side where the back surface 305 is located, and the second notch 309 between the hair implanting portions 31 enables the bristles 50 of adjacent hair implanting portions 31 to have a larger deformation distance when the brush body 30 is deformed, thereby increasing the deformation amount of the brush body 30.

[0191] See also Figure 8 and Fig. 20 In some embodiments, the rod body 10 has a thickness midplane M, and the connecting portion 33 intersects or connects with the thickness midplane M. The thickness midplane M of the rod body 10 refers to a plane that is perpendicular to the thickness direction Z of the electric toothbrush head 100 and divides the rod body 10 into two equal parts in the thickness direction Z. The connecting portion 33 intersects or connects with the thickness midplane M, which means that the thickness midplane M intersects with the connecting portion 33 in any projection plane.

[0192] See also Figure 7 or Fig.19 In some embodiments, the rod body 10 has a width median plane H. The connecting portion 33 intersects or contacts the width median plane H of the rod body 10. The width median plane H of the rod body 10 is a plane that is perpendicular to the width direction Y of the electric toothbrush head 100 and divides the rod body 10 into two equal parts in the width direction Y. The connecting portion 33 intersects or contacts the width median plane H, which enables the electric toothbrush head 100 to be parted in the width direction Y during injection molding, so that the brush body 30 can be integrally molded and has better processability.

[0193] See also Figure 1 , Figure 2 , Figure 7 and Figure 8 In some embodiments, the electric toothbrush head 100 further includes a deformable portion 35 that is deformable under force. The deformable portion 35 is combined with at least one of the hair implantation portion 31, the connection portion 33, and the rod body 10 to support and / or protect the portion combined with the deformable portion 35.

[0194] Specifically, in some embodiments, the deformable portion 35 is a soft glue, or other elastic materials. The deformable portion 35 can produce elastic deformation to prevent collision between the hair-planting portion 31 and the oral cavity. The two opposite sides of the connecting portion 33 along the thickness direction Z of the electric toothbrush head 100 will face the gap between the hair-planting portions 31. The deformable portion 35 used for protection and filling can fill the gap between the hair-planting portions 31 and wrap the opposite sides of the connecting portion 33 to protect the connecting portion 33 and prevent the connecting portion 33 from breaking. The deformable portion 35 wrapped around the outside of the rod body 10 can provide a shock-absorbing effect for the rod body 10 to prevent the rod body 10 from breaking when the electric toothbrush head 100 falls. Furthermore, the deformation part 35 is a soft rubber structure, and the deformation part 35 can fill the gap between the hair implanting parts 31, and cover the hair implanting parts 31 and the surrounding side surface 303. Therefore, the deformation part 35 is not easy to fall off from the hair implanting part 31, and there is no obvious boundary between the deformation part 35 and the hair implanting part 31, so it is not easy to form dirt deposition. The deformation part 35 can be formed on the hair implanting part 31 and other structures by hot-melting the soft rubber material and then solidifying it again. When the hair implanting surface 301 is protruding compared to the deformation part 35, the soft rubber material in a fluid state will not enter the hair implanting hole 3011 provided on the first side of the hair implanting part 31, so as to avoid the difficulty of installing the bristles 50 in the hair implanting hole 3011.

[0195] See also Figure 3 , Figure 4 , Fig.15 and Fig.16 Specifically, in some embodiments, the deformation portion 35 includes a first sub-portion 351 covering the side where the hair-implanting surface 301 of the hair-implanting portion 31 is located, and a second sub-portion 353 covering the side where the back side 305 of the hair-implanting portion 31 is located. The first sub-portion 351 does not extend beyond the hair-implanting surface 301. The surface of the second sub-portion 353 facing away from the back side 305 is a smooth curved surface.

[0196] The first subsection 351 can fill the gaps between the multiple hair-planting surfaces 301, and can also fill the gaps between each hair-planting surface 301 and the connecting portion 33, to prevent the electric toothbrush head 100 from being uneven between the hair-planting surface 301 and the connecting portion 33, resulting in residual dirt that affects the use. The first subsection 351 does not extend beyond the hair-planting surface 301, which can prevent the material of the first subsection 351 from entering the hair-planting hole 3011, and prevent the bristles 50 from being difficult to install in the hair-planting hole 3011. The second subsection 353 can fill the gaps between the multiple back sides 305, and can also fill the gaps between each back side 305 and the connecting portion 33, so that each back side 305 is connected to the deformation portion 35. It is prevented that the surface of the electric toothbrush head 100 on the side where the back side 305 is located is uneven, resulting in residual dirt that affects the use. The surface of the second sub-section 353 facing away from the back side 305 is a smooth curved surface, which can fill and compensate for the uneven shape of the brush body 30, and fill the gap between the two opposite sides of the connecting part 33 along the thickness direction Z of the electric toothbrush head 100 facing the hair-planting part 31, so that the brush body 30 is easier to clean and less likely to harbor dirt.

[0197] See also Figure 3 , Figure 4 , Fig.15 and Fig.16 Specifically, in some other embodiments, the first sub-portion 351 is flush with the hair-implanting surface 301. The surface of the second sub-portion 353 that is away from the back surface 305 is a smooth curved surface.

[0198] The first sub-portion 351 can fill the gaps between multiple hair-planting surfaces 301, and can also fill the gaps between each hair-planting surface 301 and the connecting portion 33, so as to avoid the electric toothbrush head 100 being uneven between the hair-planting surface 301 and the connecting portion 33, resulting in residual dirt affecting the use. The first sub-portion 351 is flush with the hair-planting surface 301, which is easy to cast the deformation portion 35. The second sub-portion 353 can fill the gaps between multiple back faces 305, and can also fill the gaps between each back face 305 and the connecting portion 33, so that each back face 305 is connected to the deformation portion 35, so as to avoid the electric toothbrush head 100 being uneven on the side where the back face 305 is located, resulting in residual dirt affecting the use. The surface of the second sub-portion 353 facing away from the back face 305 is a smooth curved surface, which can fill and compensate for the uneven shape of the brush body 30, and fill the gap between the two opposite sides of the connecting portion 33 facing the hair-planting portion 31 along the thickness direction Z of the electric toothbrush head 100.

[0199] See also Fig.25 The electric toothbrush 1000 of the embodiment of the present application comprises the electric toothbrush head 100 and the brush handle 300 of any of the above embodiments. The electric toothbrush head 100 is mounted on the brush handle 300.

[0200] Please combine Figure 4 and Figure 5, or combined Fig.16 and Fig.17 In the electric toothbrush 1000 of the present application, the brush handle 300 can vibrate and transmit the vibration to the bristles 50 on the electric toothbrush head 100. When the electric toothbrush head 100 is subjected to force, the connecting portion 33 will be deformed by force to change the distance between adjacent hair-planting portions 31. At this time, the bristles 50 arranged on the hair-planting portions 31 will fit on the surface of the teeth in contact with it and in the gaps between the teeth. Therefore, when the electric toothbrush head 100 vibrates, the vibrating bristles 50 clean the surface of the teeth and the gaps between the teeth more fully, and the cleaning effect is better.

[0201] In the description of this specification, the descriptions with reference to the terms "certain embodiments", "in an example", "exemplarily", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0202] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electric toothbrush head, characterized in that: include: Rod body; A brush body connected to the rod body, the brush body comprising a hair-planting portion, the hair-planting portion comprising a hair-planting surface and a back surface facing each other, the hair-planting surface being provided with hair-planting holes; and Bristles, the bristles are arranged in the hair-planting holes and extend from the hair-planting surface of the hair-planting part, the bristles include at least two brush filament groups, each of the brush filament groups includes at least two hair bundles, in the length and / or width direction of the brush body, at least two of the brush filament groups are arranged at intervals, and in the same brush filament group, at least two of the hair bundles are arranged at intervals; The minimum spacing between the bristle bundles of adjacent brush filament groups meets the following requirements: being greater than the spacing between the adjacent bristle bundles in at least one of the brush filament groups, and in the length direction of the brush body from close to the rod body to away from the rod body, the bristles include a proximal brush filament group and a distal brush filament group arranged in sequence, and the bristle bundles of the proximal brush filament group are more than the bristle bundles of the distal brush filament group; the minimum spacing between the bristle bundles of the proximal brush filament group and the bristle bundles of the distal brush filament group is at least greater than the spacing between the adjacent bristle bundles in the proximal brush filament group.

2. The electric toothbrush head according to claim 1, characterized in that: The density of the hair bundles distributed in any of the brush filament groups is greater than the density of the hair bundles in the bristles.

3. The electric toothbrush head according to claim 1, characterized in that: In the length direction of the brush body from close to the rod body to far away from the rod body, the bristles include a proximal brush filament group, an intermediate brush filament group and a distal brush filament group arranged in sequence, and the bristles of the intermediate brush filament group are more than the bristles of the proximal brush filament group and the bristles of the distal brush filament group; the minimum spacing between the bristle bundles of adjacent brush filament groups is at least greater than the spacing between adjacent bristle bundles in the intermediate brush filament group.

4. The electric toothbrush head according to claim 1, characterized in that: At least some of the hair bundles have sharp corners in cross section.

5. The electric toothbrush head according to claim 4, characterized in that: The cross section of the bristle bundles in the area close to the edge of the brush filament group has a sharp corner.

6. The electric toothbrush head according to claim 1, characterized in that: The brush filament group comprises a middle area and an edge area surrounding the middle area, and at least part of the bristle bundles in at least part of the edge area of ​​the brush filament group are higher than the bristle bundles in the middle area.

7. The electric toothbrush head according to claim 1, characterized in that: When the brush body is deformed to the maximum from the side where the hair planting surface is located toward the side where the back surface is located, the length of the hair bundles of adjacent brush filament groups abutting against each other is not greater than 1 / 3 of any adjacent hair bundles in the adjacent brush filament groups.

8. The electric toothbrush head according to claim 1, characterized in that: The minimum spacing between the bristle bundles between adjacent brush filament groups ranges from [1.5 mm to 4.0 mm].

9. The electric toothbrush head according to claim 1, characterized in that: There is one implanted hair portion, and a plurality of brush filament groups are located on the implanted hair portion. When the bristles and / or the implanted hair portion are subjected to force, the brush body is deformed as a whole.

10. The electric toothbrush head according to claim 1, characterized in that: There is one implanted hair portion, and a plurality of brush filament groups are located on the implanted hair portion. The implanted hair portion includes a plurality of regions, each of which is provided with a brush filament group. When the bristles and / or the implanted hair portion are subjected to force, at least one of the plurality of regions of the implanted hair portion is deformed.

11. The electric toothbrush head according to claim 1, characterized in that: There are at least two hair-implanted portions, and the brush body further includes at least one connecting portion. In the length direction of the rod body, at least two of the hair-implanted portions are arranged in sequence at intervals, and the connecting portion is arranged in the interval between two adjacent hair-implanted portions and is used to connect two adjacent hair-implanted portions; when the bristles and / or the hair-implanted portions are subjected to force, at least one of the connecting portions is deformed to drive at least one of the multiple hair-implanted portions to deform.

12. The electric toothbrush head according to any one of claims 9 to 11, characterized in that: The bendable amount of the brush body from the side where the back surface is located to the side where the hair-planting surface is located is smaller than the bendable amount of the brush body from the side where the hair-planting surface is located to the side where the back surface is located.

13. The electric toothbrush head according to claim 11, characterized in that: The hardness of the hair implanting portion is greater than that of the connecting portion; and / or, The thickness of the hair implantation portion is greater than the thickness of the connection portion; and / or, The width of the hair implantation portion is greater than the width of the connecting portion; and / or The width of the connecting portion is greater than the thickness of the connecting portion.

14. The electric toothbrush head according to claim 11, characterized in that: In the thickness direction of the brush body, the connecting portion does not extend beyond the hair implantation surface; and / or, In the thickness direction of the brush body, the connecting portion does not extend beyond the back surface; and / or In the thickness direction of the brush body, the distance between the connecting portion and the hair implantation surface is greater than the distance between the connecting portion and the back surface.

15. The electric toothbrush head according to claim 11, characterized in that: In the length direction of the brush body, the back side is provided with a first notch on a side close to the connecting portion, and when the brush body is convexly deformed from the side where the back side is located toward the side where the hair-planting surface is located, the first notch is used to provide an escape space for the hair-planting portion; and / or A second gap is formed between adjacent hair-planting portions, and when the brush body is convexly deformed from the side where the hair-planting surface is located toward the side where the back surface is located, the second gap is used to provide an escape space for the bristles.

16. The electric toothbrush head according to claim 11, characterized in that: At least two of the hair-implanted portions include a first hair-implanted portion connected to the rod body and a second hair-implanted portion farthest from the rod body in the length direction of the rod body. The area of ​​the hair-implanted surface of the first hair-implanted portion is larger than the area of ​​the hair-implanted surface of the second hair-implanted portion; the thickness of the first hair-implanted portion is greater than the thickness of the second hair-implanted portion.

17. The electric toothbrush head according to claim 11, characterized in that: At least two of the hair-implanted portions include a first hair-implanted portion connected to the rod body, a second hair-implanted portion farthest from the rod body in the length direction of the rod body, and a third hair-implanted portion located between the first hair-implanted portion and the second hair-implanted portion, the area of ​​the hair-implanted surface of the third hair-implanted portion is greater than the area of ​​the hair-implanted surface of the first hair-implanted portion, and the area of ​​the hair-implanted surface of the third hair-implanted portion is greater than the area of ​​the hair-implanted surface of the second hair-implanted portion; the thickness of the third hair-implanted portion is greater than the thickness of the first hair-implanted portion, the thickness of the third hair-implanted portion is greater than the thickness of the second hair-implanted portion, and the thickness of the first hair-implanted portion is greater than the thickness of the second hair-implanted portion.

18. The electric toothbrush head according to claim 11, characterized in that: The hair implantation portion includes a hair implantation sheet and a reinforcing protrusion. The hair implantation sheet includes the hair implantation surface and a rear surface opposite to each other. The reinforcing protrusion is arranged on the rear surface and is used to strengthen the strength of the hair implantation portion.

19. The electric toothbrush head according to claim 18, characterized in that: The hair implantation hole is a blind hole, and the bristles are fixed in the hair implantation hole through a copper sheet.

20. The electric toothbrush head according to claim 18, characterized in that In the direction from the hair-planting surface to the rear surface, a cross section of the reinforcing protrusion cut by a plane perpendicular to the thickness direction of the brush body gradually decreases.

21. The electric toothbrush head according to claim 11, characterized in that: The rod body has a thickness mid-plane and a width mid-plane, and the connecting portion intersects or connects with the thickness mid-plane; and / or the connecting portion intersects or connects with the width mid-plane.

22. The electric toothbrush head according to claim 11, characterized in that: The electric toothbrush head also includes: A deformation portion that can be deformed under force, the deformation portion is combined with at least one of the hair implantation portion, the connection portion, and the rod body to support and / or protect the portion combined with the deformation portion.

23. The electric toothbrush head according to claim 22, characterized in that: The deformation part covers the back and peripheral side surfaces of the hair-implanting part, all surfaces of the connecting part, and all outer surfaces of the rod body, and fills the gaps between adjacent hair-implanting parts.

24. The electric toothbrush head according to claim 22, characterized in that: The deformation portion comprises: A first sub-portion covering the side of the hair-implanting surface of the hair-implanting portion, wherein the first sub-portion does not exceed the hair-implanting surface or is flush with the hair-implanting surface; and A second sub-portion covering the side of the back side of the hair implantation portion, wherein the surface of the second sub-portion away from the back side is a smooth curved surface.

25. An electric toothbrush, characterized in that: include: The electric toothbrush head according to any one of claims 1 to 24, and A brush handle, wherein the electric toothbrush head is mounted on the brush handle.

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