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 at least two bristle planting parts and at least one connecting part. In the length direction of the rod body, the at least two bristle planting parts are sequentially arranged at intervals. The flocking part comprises a flocking surface and a peripheral side surface which are connected with each other; and hair planting holes are formed in the hair planting surface. The rod body is connected with the peripheral side face of at least one bristle planting part. The connecting part is arranged in a gap between two adjacent hair planting parts and is used for connecting the two adjacent hair planting parts. And the bristles are arranged in the bristle planting holes and extend out of the bristle planting surface of the bristle planting part. Under the condition that the bristles and / or the bristle planting part are / is stressed, the connecting part deforms so as to drive the brush body to bend and deform.

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. When the electric toothbrush is working, the motor in the handle drives the electric toothbrush head to vibrate to clean the surface and gaps of the teeth. The brush body of the current electric toothbrush is mostly a whole piece structure without gaps. Therefore, the whole piece structure of the brush body has the same vibration transmission effect on the bristles arranged thereon, resulting in the vibration effect of the bristles not matching the vibration transmission requirements of different tooth fitting positions, resulting in poor tooth 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] An electric toothbrush head according to an embodiment of the present application includes a rod body, a brush body connected to the rod body, and bristles. The brush body includes at least two hair-planting parts and at least one connecting part. In the length direction of the rod body, at least two of the hair-planting parts are arranged in sequence at intervals. The hair-planting part includes a connected hair-planting surface and a peripheral side surface. The hair-planting surface is provided with a hair-planting hole. The rod body is connected to the peripheral side surface of at least one of the hair-planting parts. The connecting part is arranged in the interval between two adjacent hair-planting parts and is used to connect two adjacent hair-planting parts. The bristles are arranged in the hair-planting holes and extend from the hair-planting surface of the hair-planting part. When the bristles and / or the hair-planting part are subjected to force, the connecting part deforms to drive the brush body to bend and deform.

[0005] During the use of the electric toothbrush head, the bristles and the hair-implanted portion may be subjected to pressure from the portion to be cared for (i.e., structures in the oral cavity such as teeth), and the pressure will be transmitted to the connection portion connected to the hair-implanted portion. When the connection portion is deformed by force, the hair-implanted portions connected to the connection portion will move away from or approach each other, so that the distance between adjacent hair-implanted portions will change, thereby causing the brush body to bend and deform. Since the bristles and the hair-implanted portion can both fit in different positions of the portion to be cared for and transmit different pressures to the connection portion, the direction and magnitude of the force deformation of the connection portion are different, and the vibration effect of the bristles transmitted from the rod body to different hair-implanted portions 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 teeth cleaning effect.

[0006] In some embodiments, the hardness of the hair implantation portion is greater than that of the connecting portion.

[0007] The hair-planting part with greater hardness has a better supporting effect on the bristles in the hair-planting 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 hair-planting 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.

[0008] In some embodiments, the thickness of the hair implantation portion is greater than the thickness of the connecting portion.

[0009] 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.

[0010] In some embodiments, the width of the hair implantation portion is greater than the width of the connecting portion.

[0011] 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.

[0012] In some embodiments, the thickness of the hair-implanted portion is greater than the thickness of the connecting portion, and the width of the hair-implanted portion is greater than the width of the connecting portion.

[0013] The thickness of the implanted hair portion is greater than the thickness of the connecting portion. The thicker implanted hair portion has better supporting characteristics for the bristles, and the thinner connecting portion is more likely to deform under the condition of force, so as to drive the implanted hair portions closer to each other and / or away from each other, thereby making the bristles on different implanted hair portions produce different vibration effects; the width of the implanted hair portion is greater than the width of the connecting portion. The wider implanted hair portion has better supporting characteristics for the bristles, and the narrower connecting portion is more likely to deform under the condition of force, so as to drive the implanted hair portions closer to each other and / or away from each other, thereby making the bristles on different implanted hair portions produce different vibration effects.

[0014] In certain embodiments, the width of the connecting portion is greater than the thickness of the connecting portion.

[0015] 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.

[0016] In some embodiments, the hair-implanting portion further includes a back side opposite to the hair-implanting surface, and the deformation of the connecting portion can drive the brush body to bend and deform toward the side where the hair-implanting surface is located and toward the side where the back side is located.

[0017] In the thickness direction of the brush body, the brush body can bend and deform in two directions, namely, the hair-planting side and the back side, so that it can fit more angles of the oral cavity and improve the cleaning effect of the electric toothbrush head.

[0018] In some embodiments, the bendable amount of the brush body toward the side where the hair-planting surface is located is smaller than the bendable amount of the brush body toward the side where the back surface is located.

[0019] 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.

[0020] In some embodiments, in the thickness direction of the brush body, the connecting portion does not extend beyond the hair implantation surface.

[0021] The connecting portion does not exceed the hair-planting surface, so that the hair-planting 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.

[0022] In some embodiments, in the thickness direction of the brush body, the connecting portion does not extend beyond the back surface.

[0023] The connection portion does not exceed the hair-planting 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.

[0024] In some embodiments, in the thickness direction of the brush body, the connecting portion does not extend beyond the hair-implanting surface, and the connecting portion does not extend beyond the back surface.

[0025] The connection portion does not exceed the hair-planting surface, so that the hair-planting surface and the back surface can have better deformation space when bending and deforming toward the side where the hair-planting surface is located and when bending and deforming toward the side where the back surface is located in the thickness direction of the brush body.

[0026] 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.

[0027] 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.

[0028] 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 is convexly deformed from the back side toward the hair-planting side, the first notch is used to provide an escape space for the hair-planting portion.

[0029] 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.

[0030] 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 deformed convexly from the hair-planting side toward the back side, the second gap is used to provide a space for the bristles to escape.

[0031] 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.

[0032] 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. In the case where 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. A second notch is formed between adjacent hair-planting portions. In the case where the brush body is convexly deformed from the side where the hair-planting surface is located toward the side where the back side is located, the second notch is used to provide an escape space for the bristles.

[0033] The first notch on the back of the implanted hair part and the second notch between the implanted hair parts can provide avoidance space for the implanted hair part when the brush body bulges and deforms from the side where the back is located toward the side where the implanted hair surface is located (the connecting part deforms outward) or when the brush body bulges and deforms from the side where the implanted hair surface is located toward the side where the back is located (the connecting part deforms inward), thereby making the outward deformation of the brush body larger.

[0034] In some embodiments, the at least two 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.

[0035] On the one hand, the connection between the first hair-planting portion and the rod body enhances the support of the first hair-planting portion. When the electric toothbrush head is moved in the oral cavity, the first hair-planting portion and the teeth can be better fitted. The second hair-planting portion is away from the rod body and connected to the first hair-planting portion through a connecting portion. Due to the deformability of the connecting portion, the second hair-planting portion can have a larger range of motion during vibration, thereby contacting different positions of the portion to be cared for, so as to achieve cleaning of various positions of the portion to be cared for. On the other hand, when the electric toothbrush head is working, the first hair-planting portion has a larger contact area with the oral cavity than the second hair-planting portion. The larger area of ​​the first hair-planting portion is designed to improve the efficiency of oral cleaning. The second hair-planting portion is usually closer to the inside of the oral cavity than the first hair-planting portion. The smaller area of ​​the second hair-planting portion is designed to reduce the foreign body sensation in the oral cavity and improve the mobility of the electric toothbrush head in the oral cavity.

[0036] In some embodiments, at least two of the hair implantation parts include a first hair implantation part connected to the rod body, a second hair implantation part farthest from the rod body in the length direction of the rod body, and a third hair implantation part located between the first hair implantation part and the second hair implantation part. The area of ​​the hair implantation surface of the third hair implantation part is larger than the area of ​​the hair implantation surface of the first hair implantation part, and the area of ​​the hair implantation surface of the third hair implantation part is larger than the area of ​​the hair implantation surface of the second hair implantation part.

[0037] The connection between the first hair-planting portion and the rod body enhances the support of the first hair-planting portion. When the electric toothbrush head is moved in the oral cavity, the first hair-planting portion and the teeth can be better fitted. The second hair-planting portion is farthest from the rod body, and is connected to the third hair-planting portion through a connecting portion. Since the connecting portion is deformable, the second hair-planting portion can have a larger range of motion when vibrating, thereby contacting different positions of the portion to be cared for. When the bristles are subjected to force and the connecting portion is deformed, the first hair-planting portion and the second hair-planting portion can move in various directions away from the third hair-planting portion with the third hair-planting portion as the center, so that the bristles provided on the third hair-planting portion, the first hair-planting portion and the second hair-planting portion can contact different positions of the portion to be cared for, so as to achieve cleaning of various positions of the portion to be cared for.

[0038] In some embodiments, the thickness of the third hair-implanted portion is greater than the thickness of the first hair-implanted portion, and the thickness of the third hair-implanted portion is greater than the thickness of the second hair-implanted portion.

[0039] When the bristles are stressed and the connecting part is deformed, the second implanted part goes deeper into the oral cavity. The thinning thickness can reduce the foreign body sensation when the electric toothbrush head is inserted into the oral cavity. The third implanted part has the largest thickness, which allows the third implanted part to contact the oral cavity wall first in the thickness direction, and uses the pressure of the oral cavity wall to clamp the third implanted part between the oral cavity wall and the tooth surface, so that the third implanted part fits the oral cavity better and improves the cleaning effect of the third implanted part.

[0040] In some embodiments, the thickness of the first hair-implanted portion is greater than the thickness of the second hair-implanted portion.

[0041] The thickness of the first implanted hair part helps to improve 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 smaller 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.

[0042] 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. The reinforcing protrusion is arranged on the rear surface, and the reinforcing protrusion is used to strengthen the strength of the hair-implanting portion.

[0043] 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.

[0044] In some embodiments, the hair transplanting hole is a blind hole, and the bristles are fixed in the hair transplanting hole by a copper sheet.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] In some embodiments, the rod body has a thickness midplane and a width midplane, and the connecting portion intersects or connects with the thickness midplane.

[0049] The connecting part intersects or connects with the mid-thickness dividing plane, which allows the electric toothbrush head to be divided in thickness during injection molding, so that the brush head body can be integrally molded, and the processability is better. The integrally molded hair-planting part, connecting part and reinforcing protrusion can form a stable connection, which can avoid the gap between the hair-planting part, connecting part and reinforcing protrusion, which may cause dirt to accumulate. On the other hand, it can also avoid the separation of the connection between the hair-planting part, connecting part and reinforcing protrusion when subjected to force, which may cause damage to the electric toothbrush head, thereby extending the service life of the electric toothbrush head.

[0050] In some embodiments, the rod body has a thickness midplane and a width midplane, and the connecting portion intersects or connects with the width midplane.

[0051] The connecting part intersects or connects with the width dividing plane, which allows the electric toothbrush head to be divided in width during injection molding, so that the brush head body can be integrally molded and has better processability. The integrally molded hair-planting part, connecting part and reinforcing protrusion can form a stable connection, which can avoid the gap between the hair-planting part, connecting part and reinforcing protrusion, which can cause dirt to accumulate. On the other hand, it can also avoid the separation of the connection between the hair-planting part, connecting part and reinforcing protrusion when subjected to force, which can cause damage to the electric toothbrush head, thereby extending the service life of the electric toothbrush head.

[0052] In some embodiments, the rod body has a thickness midplane and a width midplane, and the connecting portion intersects or connects with the thickness midplane and the connecting portion intersects or connects with the width midplane.

[0053] The connecting portion intersects or connects with the width dividing surface, which allows the electric toothbrush head to be evenly divided in thickness or width during injection molding, so that the brush head body can be molded in one piece, with better processability. The two parting surfaces also allow the electric toothbrush head to be more flexible during processing. A stable connection can be formed between the one-piece molded hair-planting portion, connecting portion and reinforcing protrusions. On the one hand, it can avoid the presence of gaps in the connection between the hair-planting portion, connecting portion and reinforcing protrusions that lead to dirt deposition. On the other hand, it can also avoid the connection between the hair-planting portion, connecting portion and reinforcing protrusions from separating when subjected to force, causing damage to the electric toothbrush head, thereby extending the service life of the electric toothbrush head.

[0054] 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.

[0055] The deformable part can produce elastic deformation to avoid collision between the implanted hair part and the part to be cared for. The two opposite sides of the connecting part along the thickness direction of the electric toothbrush head will face the gap between the implanted hair parts. The deformable part used for protection and filling can fill the gap between the implanted hair parts and wrap the opposite sides of the connecting part to protect the connecting part and avoid the connection part from breaking. The deformable part wrapped on the outside of the rod body can make the connection between the rod body and the brush body tighter, and can also bring a shock-absorbing effect to the rod body to prevent the rod body from breaking when the electric toothbrush head falls.

[0056] 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.

[0057] The first sub-section can fill the gaps between multiple bristle-planted surfaces, and can also fill the gaps between each bristle-planted surface and the connecting portion, to avoid the electric toothbrush head being uneven between the bristle-planted surface and the connecting portion, resulting in residual dirt affecting use. The first sub-section does not extend beyond the bristle-planted surface, which can prevent the material of the first sub-section from entering the bristle-planted holes, and prevent the bristles from being difficult to install in the bristle-planted holes. The second sub-section can fill the gaps between multiple back sides, and can also fill the gaps between each back side and the connecting portion, so that each back side is connected to the deformation portion, to avoid the electric toothbrush head having an uneven surface on the side where the back side is located, resulting in residual dirt affecting use. The surface of the second sub-section facing away from the back side is a smooth curved surface, which can fill and compensate for the uneven shape of the brush body, and fill the gap between the two opposite sides of the connecting portion along the thickness direction of the electric toothbrush head facing the bristle-planted portion, making the brush body easier to clean and less likely to harbor dirt.

[0058] 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.

[0059] 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.

[0060] In some embodiments, the deformation portion is soft glue.

[0061] The deformable part made of soft rubber can produce elastic deformation to avoid collision between the hair-planting part and the part to be cared for. The deformable part used for protection and filling can fill the gap between the hair-planting parts and wrap the opposite sides of the connecting part to protect the connecting part and avoid the connecting part from breaking. The deformable part wrapped on the outside of the rod body can bring a shock-absorbing effect to the rod body to avoid the rod body from breaking when the electric toothbrush head falls. In addition, the deformable part is a soft rubber structure, and the deformable part can fill the gap between the hair-planting parts and cover the hair-planting parts and the surrounding side surfaces. Therefore, the deformable part is not easy to fall off from the hair-planting part, and there is no obvious boundary between the deformable part and the hair-planting part, so it is not easy to form dirt deposition. The deformable part can be formed on the structure such as the hair-planting part by hot-melting the soft rubber material and then solidifying it. When the hair-planting surface is protruding compared to the deformable part, the soft rubber material in a fluid state will not enter the hair-planting holes on the side where the hair-planting surface is located, so as to avoid the difficulty of installing the bristles in the hair-planting holes.

[0062] In some embodiments, the bristles include at least two brush filament groups corresponding to at least two of the hair-planting parts, each of the brush filament groups includes at least two hair bundles, and at least two of the brush filament groups are arranged at intervals.

[0063] The brush wire groups are arranged at intervals, so that the same implanted bristle part can form multiple cleaning areas corresponding to the brush wire groups, so that the electric toothbrush head can cover different areas when in use, improving cleaning efficiency. At the same time, the brush wire groups arranged at intervals can form multiple points of force in the mouth, so that the parts of the mouth that contact the brush wire groups are evenly stressed, avoiding a single point of force causing excessive pressure on the mouth.

[0064] In some embodiments, the bristles include at least two brush filament groups corresponding to at least two of the hair-planting parts, each of which includes at least two hair bundles. In the same brush filament group, at least two of the hair bundles are arranged at intervals.

[0065] In the same brush set, the bristles are arranged at intervals, which creates space between the bristles. When the bristles are deformed by pressure, they have more room to deform, and can bend and adapt to the shapes of surfaces at different locations in the mouth more flexibly, better fit different areas in the mouth, and improve the cleaning effect.

[0066] In some embodiments, the bristles include at least two brush filament groups corresponding to at least two of the bristle implantation parts, each of the brush filament groups includes at least two bristle bundles, at least two of the brush filament groups are arranged at intervals, and in the same brush filament group, at least two of the bristle bundles are arranged at intervals.

[0067] The brush wire groups are arranged at intervals, so that the same implanted part can form multiple cleaning areas corresponding to the brush wire groups, so that the electric toothbrush head can cover different areas during use, improving cleaning efficiency. At the same time, the brush wire groups arranged at intervals can form multiple points of force in the mouth, so that the parts of the mouth that contact the brush wire groups are evenly stressed, avoiding a single point of force causing excessive pressure on the mouth.

[0068] In the same brush filament group, the interval arrangement of the bristles creates spacing between the bristles. When the bristles are deformed by pressure, they have a larger deformation space, can bend and adapt to the shape of the surface in different positions in the mouth more flexibly, better fit different areas in the mouth, and improve the cleaning effect. The dual interval arrangement of the brush filament group and the bristles can cover the cleaning area more comprehensively and provide a more comprehensive cleaning effect.

[0069] In certain embodiments, the maximum distance between adjacent bristle bundles of each of the brush filament groups is smaller than the minimum distance between adjacent bristle bundles of the brush filament groups.

[0070] When the maximum distance between adjacent hair bundles of each brush filament group is less than the minimum distance between adjacent hair bundles of each brush filament group, the interaction between different brush filament groups is reduced, which can reduce the influence of the brush filament groups on the deformation of the brush body. When the electric toothbrush head is deformed inward due to force during the cleaning process, the adjacent brush filament groups will not interfere with each other, and the hair bundles between adjacent brush filament groups will not abut against each other to affect deformation. On the other hand, the distance between adjacent hair bundles of each brush filament group is small, which can allow more hair bundles to be arranged in the same hair planting part, thereby improving the cleaning effect of the electric toothbrush head.

[0071] In some embodiments, the distance between the bristle bundles of adjacent brush filament groups satisfies the following requirement: when the brush body is convexly deformed to the maximum from the side where the bristle implantation surface is located toward the side away from the bristle implantation surface, the length of the bristle bundles of adjacent brush filament groups abutting against each other is not greater than 1 / 3 of any adjacent bristle bundles in the adjacent brush filament groups.

[0072] When the length of the hair bundles of adjacent brush filament groups abutting against each other is greater than 1 / 3 of any adjacent hair bundles in the adjacent brush filament groups, the abutting length of the hair bundles is too large. On the one hand, it will cause the hair bundles to entangle and hinder each other during the cleaning process, reducing the cleaning efficiency of a single hair bundle. On the other hand, it will cause the brush filament group to deform when subjected to force, damaging the bristles and affecting the life of the electric toothbrush head. When the length of the hair bundles of adjacent brush filament groups abutting against each other is less than 1 / 3, there is a certain distance between the hair bundles, and a single hair bundle has a larger range of movement and cleaning, which improves the cleaning efficiency of the brush filament group. In addition, the abutting length is less than 1 / 3 of the length of any hair bundle, which can reduce the friction and wear between different hair bundles and extend the service life of the electric toothbrush head.

[0073] In some embodiments, the minimum distance between the bristle bundles of adjacent brush filament groups ranges from [1.5 mm to 4.0 mm].

[0074] When the minimum distance between the hair bundles of adjacent brush wire groups is less than 1.5mm, the bristles of the hair bundles between adjacent brush wire groups will interfere with each other, affecting the flexibility of a single hair bundle during cleaning and reducing the cleaning efficiency of the brush wire group. At the same time, too small a hair bundle distance makes the brush wire group as a whole too compact, which will put greater pressure on the part to be cared for when the electric toothbrush head is working, causing physiological discomfort to the user. Since different brush wire groups cover different areas of the part to be cared for, the area of ​​the part to be cared for corresponding to the gap between the brush wire groups needs to be bent and deformed by the hair bundles of the brush wire group located around the gap before cleaning. When the hair bundle distance between adjacent brush wire groups is greater than 4.0mm, the coverage area of ​​the part to be cared for by the electric toothbrush head will be uneven, and some areas will not be covered. When the minimum value range of the hair bundle distance between adjacent brush wire groups is [1.5mm, 4.0mm], the bristles of the hair bundles between adjacent brush wire groups will not interfere with each other, and a single hair bundle will be flexible during cleaning. The area to be cared for corresponding to the gaps between the brush filament groups can be cleaned after the bristles of the brush filament groups around the gaps are bent and deformed, thereby achieving comprehensive cleaning of the area to be cared for.

[0075] 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.

[0076] The brush handle can vibrate and transmit the vibration to the bristles on the electric toothbrush head. Both the bristles and the hair-implanted portion may be subjected to pressure from the portion to be cared for (i.e., structures in the oral cavity such as teeth), and the pressure will be transmitted to the connecting portion connected to the hair-implanted portion. When the connecting portion is deformed by force, the hair-implanted portions connected to the connecting portion will move away from or approach each other, so that the distance between adjacent hair-implanted portions will change, thereby causing the brush body to bend and deform. Since both the bristles and the hair-implanted portion can fit in different positions of the portion to be cared for and transmit different pressures to the connecting portion, the direction and magnitude of the deformation of the connecting portion due to force are different, thereby causing the brush body to transmit different vibration amplitudes at different fitting positions with the portion to be cared for. Different vibration amplitudes can more fully clean the surface of the teeth and the gaps between the teeth, and the cleaning effect is better.

[0077] 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

[0078] 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:

[0079] Figure 1 is a three-dimensional schematic diagram of an electric toothbrush head according to some embodiments of the present application;

[0080] Figure 2 yes Figure 1 A three-dimensional schematic diagram of a partial structure of an electric toothbrush head shown;

[0081] Figure 3 is a schematic diagram of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0082] Figure 4 yes Figure 3 A schematic diagram of a portion of the structure of an electric toothbrush head is shown;

[0083] Figure 5 yes Figure 3 A front view of the electric toothbrush head shown;

[0084] Figure 6 yes Figure 3 A side view of the electric toothbrush head shown;

[0085] Figure 7 is a three-dimensional schematic diagram of an electric toothbrush head according to some other embodiments of the present application;

[0086] Figure 8 yes Figure 7 A three-dimensional schematic diagram of a partial structure of an electric toothbrush head shown;

[0087] Fig. 9 is a schematic diagram of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0088] Fig.10 yes Fig. 9 A schematic diagram of a portion of the structure of an electric toothbrush head is shown;

[0089] Fig.11 yes Fig. 9 A front view of the electric toothbrush head shown;

[0090] Fig.12 yes Fig. 9 A side view of the electric toothbrush head shown;

[0091] Fig.13 yes Figure 3 A schematic cross-sectional view of a partial structure of an electric toothbrush head shown;

[0092] Fig.14 yes Fig. 9 A schematic cross-sectional view of a partial structure of an electric toothbrush head shown;

[0093] Fig.15 is a schematic diagram of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0094] Fig.16 It is a three-dimensional schematic diagram of an electric toothbrush according to certain embodiments of the present application.

[0095] Description of main component symbols:

[0096] Electric toothbrush 1000;

[0097] An electric toothbrush head 100 and a brush handle 300;

[0098] Rod body 10, brush body 30, bristles 50;

[0099] Hair transplantation part 31, hair transplantation surface 301, hair transplantation hole 3011, peripheral side surface 303, back surface 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, connection part 33, deformation part 35, first sub-part 351, second sub-part 353;

[0100] Brush filament group 51 , bristle bundle 5111 , first brush filament group 511 , second brush filament group 513 , third brush filament group 515 . DETAILED DESCRIPTION

[0101] 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.

[0102] In the description of the present application, it should be understood that the terms "thickness", "upper", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations 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 used for descriptive purposes only, 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.

[0103] 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.

[0104] See also Figure 1 , Figure 3 , Figure 7 and Fig. 9 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 at least two hair-planting parts 31 and at least one connecting part 33. In the length direction X of the rod body 10, at least two hair-planting parts 31 are arranged in sequence at intervals. The hair-planting part 31 includes a connected hair-planting surface 301 and a peripheral side surface 303. The hair-planting surface 301 is provided with a hair-planting hole 3011. The rod body 10 is connected to the peripheral side surface 303 of at least one hair-planting part 31. The connecting part 33 is arranged in the interval between two adjacent hair-planting parts 31, and is used to connect two adjacent hair-planting parts 31. The bristles 50 are arranged in the hair-planting holes 3011 and extend from the hair-planting surface 301 of the hair-planting part 31. When the bristles 50 and / or the hair-planting part 31 are subjected to force, the connecting part 33 is deformed to drive the brush body 30 to bend and deform.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] Specifically, the bristles 50 are structures for cleaning and / or caring for the teeth, gums or the inner wall of the oral cavity waiting for care. Each bristle 50 may include a plurality of brush filaments. The material of the bristles 50 includes, but is not limited to, nylon, polyamide or silicone. In the case where the material of the bristles 50 is a hard material such as nylon or polyamide, the free end of the bristles 50 can contact the tooth surface and clean the teeth and the gaps between the teeth. In the case where the material of the bristles 50 is a flexible material such as silicone, the free end of the bristles 50 can contact the tooth surface to perform polishing-like care on the tooth surface, and the free end of the bristles 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.

[0109] Specifically, 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 hair-implanting portions 31 that are spaced apart from each other. The connecting portion 33 is a plate-like structure with a relatively small thickness 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 implanted hair portion 31. At this time, the bristles 50 and / or the implanted hair portion 31 will be compressed and bent on the one hand, and on the other hand, the external force will be transmitted to the implanted hair portion 31 connected to the bristles 50. Since only the connecting portion 33 is connected to each other between adjacent implanted hair portions 31, when the implanted hair portions 31 are 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, and the size of the gap between adjacent implanted hair portions 31 will change, so that the brush body 30 will be deformed.

[0110] During the use of the electric toothbrush head 100, the bristles 50 and the hair-planting part 31 may be subjected to pressure from the part to be cared for, and the pressure will be transmitted to the connecting part 33 connected to the hair-planting part 31. When the connecting part 33 is deformed by force, the adjacent hair-planting parts 31 will move away from or approach each other, so that the distance between the adjacent hair-planting parts 31 changes, thereby driving the brush body 30 to bend and deform. Since the bristles 50 and the hair-planting part 31 can be fitted at different positions of the part to be cared for and transmit different pressures to the connecting part 33, the direction and magnitude of the force deformation of the connecting part 33 are also different, and the vibration effect of the bristles 50 transmitted from the rod body 10 to different hair-planting parts 31 will be different, and the vibration effect of the bristles 50 can be matched with the vibration transmission requirements of different fitting positions of the teeth, thereby improving the cleaning effect of the teeth. Therefore, when the electric toothbrush head 100 vibrates, the deformation of different connecting parts 33 drives the brush body 30 to transmit different vibration amplitudes at different fitting positions with the part to be cared for, so that the surface of the teeth and the gaps between the teeth are cleaned more fully, and the cleaning effect is better.

[0111] See also Figure 3 and Fig. 9Specifically, in some embodiments, the hair-planting portion 31 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 the hair-planting surface 301 and the back side 305, and connects the hair-planting surface 301 and the back side 305.

[0112] Please continue reading Figure 3 and Fig. 9 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, namely, toward the hair-planting surface 301 and the back side 305, so as to have a larger deformation angle, so as to fit more angles of the oral cavity, thereby improving the cleaning effect of the electric toothbrush head 100. 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 (i.e., 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 (i.e., 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.

[0113] Please continue reading Figure 3 and Fig. 9 In some embodiments, the bendable amount of the brush body 30 that is bent and deformed toward the side where the hair-implanted surface 301 is located is less than the bendable amount of the brush body 30 that is bent and deformed toward the side where the back side 305 is located. The bendable amount refers to the maximum bending degree or bending range that the brush body 30 can withstand when deformed by external force, and can be measured by the curve radius after bending and deformation. Generally, the larger the curve radius, the smaller the bendable amount, and the smaller the curve radius, the greater the bendable amount. When deformed by external force, the pressure on the bristles 50 and the hair-implanted portion 31 from the side of the to-be-care portion facing the back side 305 is generally greater than the pressure on the side of the hair-implanted surface 301. Therefore, the bendable amount of the brush body 30 that is bent (convex) deformed toward the side where the back side 305 is located is greater than the bendable amount of the brush body 30 that is bent (convex) deformed toward the side where the hair-implanted surface 301 is located, so that the brush body 30 can withstand pressures of different directions and sizes, thereby transmitting different vibration amplitudes. The bending deformation of the brush body on the side facing the hair-implanted surface 301 is smaller, which can ensure that the bristles 50 fit the tooth surface. The bending deformation of the brush body on the side facing the back 305 is larger, which can 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.

[0114] See also Figure 4 , Figure 6 , Fig.10 and Fig.12In 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 the reinforcing protrusion 319 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 ensure the strength of the hair implanting hole 3011 and prevent the copper sheet from excessively squeezing the hair implanting hole 3011 and causing the hair implanting part 31 to break when the bristles 50 are fixed in the hair implanting hole 3011 by the copper sheet.

[0115] See also Figure 4 , Figure 6 , Fig.10 and Fig.12 The hair-planting piece 317 is a structure for connecting with the bristles 50. Each hair-planting piece 317 is roughly a block structure. The outer contour shape of the cross section of the electric toothbrush head 100 cut along the XY plane can be the same or different, and there is no limitation here. Each hair-planting piece 317 is provided with a hair-planting hole 3011, and bristles 50 are provided in the hair-planting hole 3011 corresponding to each hair-planting piece 317. Gaps are formed between adjacent hair-planting pieces 317, and the connecting portion 33 can also connect adjacent hair-planting pieces 317. When the hair-planting portion 31 is subjected to force, the connecting portion 33 is bent under the force, so that the spacing between each adjacent hair-planting piece 317 will also change.

[0116] 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.

[0117] See also Figure 3 and Fig. 9Specifically, 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. Therefore, 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 the bristles 50 penetrate the through hole from the hair-implanting surface 301, and then are fixed to the back side 305 by gluing or fusion.

[0118] See also Figure 6 or Fig.12 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.

[0119] 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.

[0120] See also Figure 1 , Figure 2 and Figure 3 Further, 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.

[0121] On the one hand, the connection between the first hair-planting part 311 and the rod body 10 enhances the support of the first hair-planting part 311. When the electric toothbrush head 100 is moved in the oral cavity, the first hair-planting part 311 can be ensured to fit the teeth better. 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 vibrating, thereby contacting different positions of the part to be cared for, so as to achieve cleaning of various positions of the part to be cared for. 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, and the area of ​​the first hair-planting part 311 is designed to be larger, which is conducive to improving the cleaning efficiency of the oral cavity. 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.

[0122] See also Figure 7 , Figure 8 and Fig. 9 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.

[0123] 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 part to be cared for. 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 part to be cared for, so as to achieve cleaning of various positions of the part to be cared for. 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 .

[0124] See also Figure 2 and Figure 8 In some embodiments, the thickness of the first hair-planting portion 311 is greater than the thickness of the second hair-planting portion 313. In embodiments in which the brush body 30 includes three hair-planting portions 31, and in embodiments in which the brush body 30 includes two hair-planting portions 31, the thickness of the first hair-planting portion 311 is greater than the thickness of the second hair-planting portion 313. The thicker thickness of the first hair-planting portion 311 is beneficial to improving the connection stability between the brush body 30 and the rod body 10, making the overall support of the electric toothbrush head 100 better, the vibration transmission more stable, and easier to peel off the dental plaque in the oral cavity from the tooth surface. The thickness of the second hair-planting portion 313 away from the rod body 10 is smaller than that of the first hair-planting portion 311, which can make the second hair-planting portion 313 more swung under the drive of the connecting portion 33, the scraping range is wider, and it is easier to remove the dental plaque peeled off the tooth surface.

[0125] See also Figure 8 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 .

[0126] 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 uses the pressure of the oral cavity wall surface to clamp the third implanted hair portion 315 between the oral cavity wall surface and the tooth surface, so that the third implanted hair portion 315 fits the oral cavity better, thereby improving the cleaning effect of the third implanted hair portion 315.

[0127] See also Figure 1 , Figure 2 , Figure 7 and Figure 8In some embodiments, the hardness of the implanted hair portion 31 is greater than that of the connecting portion 33. The material of the implanted hair portion 31 may be a material with a greater hardness than that of the connecting portion 33. The material of the implanted hair portion 31 may also be the same as that of the connecting portion 33, but due to reasons such as size and processing technology, the formed implanted hair portion 31 is harder than the connecting portion 33. The implanted hair portion 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 from the bristles 50 to the part to be cared for. The connecting portion 33 with a smaller 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 fitting effect. On the other hand, when the electric toothbrush head 100 vibrates, the deformation of the connecting portion 33 with a smaller hardness can cause the adjacent implanted hair portion 31 to 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, and the connecting portion 33 can provide a larger deformation range for the electric toothbrush head 100, so that the electric toothbrush head 100 has better anti-fall breakage characteristics.

[0128] Please continue reading Figure 1 , Figure 2 , Figure 7 and Figure 8 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 adjacent hair-implanting portions 31 are spaced apart from each other, 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.

[0129] Please continue reading Figure 1 , Figure 2 , Figure 7 and Figure 8In 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 distance 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 distance of the circumferential side portion 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 easily deformed in the width direction Y when subjected to force than the hair-implanted portion 31. In the case where adjacent hair-implanted portions 31 are spaced apart from each other, 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 move to different positions, thereby improving the cleaning effect of the electric toothbrush head 100.

[0130] Please continue reading Figure 1 , Figure 2 , Figure 7 and Figure 8 In some other embodiments, the thickness of the hair implantation portion 31 is greater than the thickness of the connecting portion 33 , and the width of the hair implantation portion 31 is greater than the width of the connecting portion 33 .

[0131] Please continue reading Figure 1 , Figure 2 , Figure 7 and Figure 8 In some embodiments, the width of the connecting portion 33 is greater than the thickness of the connecting portion 33, which means that the dimension of the connecting portion 33 in the width direction Y is greater than the dimension of the connecting portion 33 in the thickness direction Z. In the case where the width of the connecting portion 33 is greater than the thickness of the connecting portion 33, on the one hand, the thickness of the hair-implanted portion 31 is greater than the thickness of the connecting portion 33, and the thicker hair-implanted portion 31 has better support characteristics for the bristles 50. When subjected to force, the thinner connecting portion 33 is more likely to deform in its own thickness direction Z (i.e., the force direction of the bristles 50), so as to drive the hair-implanted portions 31 closer to each other and / or away from each other, so that the bristles 50 on different hair-implanted portions 31 produce different vibration effects. On the other hand, the width of the hair-implanted portion 31 is greater than the width of the connecting portion 33, and the wider hair-implanted portion 31 has better support characteristics for the bristles 50. The narrower connecting portion 33 is more likely to deform when subjected to force, so as to drive the hair-implanted portions 31 closer to each other and / or away from each other, so that the bristles 50 on different hair-implanted portions 31 produce different vibration effects.

[0132] See also Figure 6 and Fig.12In some embodiments, in the thickness direction Z of the brush body 30, the connecting portion 33 does not extend beyond the hair-planting 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-planting surface 301 close to the back surface 305. In other embodiments, in the thickness direction Z of the brush body 30, the connecting portion 33 does not extend beyond the back surface 305, 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 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 connecting portion 33 does not extend beyond the hair-planting surface 301, and the connecting portion 33 does not extend beyond the back surface 305. The connecting portion 33 does not extend beyond the hair-planting surface 301, which allows the hair-planting surface 301 to bend (convex) and deform toward the side where the hair-planting surface 301 is located in the thickness direction Z of the brush body 30, and has a better deformation space. The connecting portion 33 does not extend beyond the hair-implanting surface 301 , so that the back surface 305 has a better deformation space to bend and deform in the thickness direction Z of the brush body 30 toward the side where the hair-implanting surface 301 is located.

[0133] See also Figure 6 and Fig.12 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 .

[0134] 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 (away from the hair-planting surface 301) is located, the connecting portion 33 is closer to the back surface 305 in the thickness direction Z, that is, h2

[0135] See also Figure 2 , Figure 6 , Figure 8 and Fig.12 ​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.

[0136] Please continue reading Figure 2 , Figure 6 , Figure 8 and Fig.12 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.

[0137] Please continue reading Figure 2 , Figure 6 , Figure 8 and Fig.12 In some embodiments, in the length direction X of the brush body 30 , the back surface 305 is provided with a first notch 307 on one side close to the connecting portion 33 . A second notch 309 is formed between adjacent hair-planting portions 31 .

[0138] The first notch 307 on the back side 305 of the hair-planting part 31 can provide an escape space for the hair-planting part 31 when the brush body 30 convexly deforms from the side where the back side 305 is located toward the side where the hair-planting surface 301 is located (the connecting part deforms outward), thereby the deformation amount of the brush body 30 outward can be made larger, and the second notch 309 between adjacent hair-planting parts 31 can provide an escape space for the hair-planting part 31 when the brush body 30 convexly deforms from the side where the hair-planting surface 301 is located toward the side where the back side 305 is located (the connecting part deforms inward). As a result, the deformation amount of the brush body 30 can be made larger.

[0139] See also Figure 6 and Fig.12 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.

[0140] See also Figure 5 or Fig.11 In some embodiments, the rod body 10 has a width mid-plane H. The connecting portion 33 intersects or contacts the width mid-plane H of the rod body 10. The width mid-plane H of the rod body 10 is a plane 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 mid-plane H, which allows 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. Please refer to 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.

[0141] See also Figure 1 , Figure 2 , Figure 7 and Figure 8Specifically, in some embodiments, the deformable portion 35 is a soft glue, or other elastic materials. The deformable portion 35 can produce elastic deformation to avoid collision between the hair-planted portion 31 and the portion to be cared for. 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-planted portions 31. The deformable portion 35 used for protection and filling can fill the gap between the hair-planted portions 31 and wrap the opposite sides of the connecting portion 33 to protect the connecting portion 33 and avoid the connecting portion 33 from breaking. The deformable portion 35 wrapped around the outside of the rod body 10 can bring a shock-absorbing effect to 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.

[0142] See also Figure 1 , Figure 2 and Fig.13 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.

[0143] 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.

[0144] Please refer to Figure 7 , Figure 8 and Fig.14 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.

[0145] 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.

[0146] See also Figure 2 and Figure 8 In some embodiments, the bristles 50 include at least two brush filament groups 51 corresponding to at least two hair-planting portions 31, and each brush filament group 51 includes at least two hair bundles 5111. The at least two brush filament groups 51 are arranged at intervals.

[0147] In the embodiment where the brush body 30 has a first hair-planting portion 311 and a second hair-planting portion 313, a first brush filament group 511 is disposed on the first hair-planting portion 311, and a second brush filament group 513 is disposed on the second hair-planting portion 313. Figure 2 In the illustrated embodiment, the first brush filament group 511 has 7 bristle bundles 5111, and the second brush filament group 513 has multiple bristle bundles 5111. The number of bristle bundles 5111 on the brush filament group 51 can be 4, 8, or 12, etc., and is not limited here. Because there is a gap between the first hair implantation portion 311 and the second hair implantation portion 313, there is also a gap between the first brush filament group 511 provided on the first hair implantation portion 311 and the second brush filament group 513 provided on the second hair implantation portion 313. In the embodiment in which the brush body 30 has the first hair implantation portion 311, the second hair implantation portion 313 and the third hair implantation portion 315, the first brush filament group 511 is provided on the first hair implantation portion 311, the second brush filament group 513 is provided on the second hair implantation portion 313, and the third brush filament group 515 is provided on the third hair implantation portion 315. There is a certain gap between each of the three brush filament groups 51. The brush wire groups 51 are arranged at intervals, so that a cleaning area corresponding to the brush wire group 51 can be formed on the same implanted hair part 31, so that the electric toothbrush head 100 can cover different areas when in use, thereby improving cleaning efficiency. At the same time, the brush wire groups 51 arranged at intervals can form multiple force points in the oral cavity, so that the part of the oral cavity that contacts the brush wire group 51 is evenly stressed, avoiding a single force point from causing excessive pressure on the oral cavity.

[0148] See also Figure 2 and Figure 8 In some embodiments, in the same brush filament group 51, at least two bristle bundles 5111 are arranged at intervals.

[0149] The spacing arrangement of the bristle bundles 5111 refers to a certain spacing between the bristle bundles 5111. The spacing between the bristle bundles 5111 can be the same, partially the same, or completely different. The projection shape of the bristle bundles 5111 in the XY plane can be a variety of structures such as an ellipse, a circle or a square, which is not limited in the present application. In the same brush filament group 51, the projection shapes of different bristle bundles 5111 can be the same or different. For example, in the first brush filament group 511, the projection shapes of the bristle bundles 5111 are circular and rounded rectangular. The first brush filament group 511 has 5 bristle bundles 5111 with circular projection shapes and 2 bristle bundles 5111 with rounded rectangular projection shapes, and the arrangement method is mixed distribution. In other embodiments of the present application, in the same brush filament group 51, the spacing between the bristle bundles 5111, the projection shape of the bristle bundles 5111 in the XY plane, and the number of bristle bundles 5111 can have a variety of arrangement and combination methods. In the same bristle group 51, the bristle bundles 5111 are arranged at intervals, so that there are intervals between the bristle bundles 5111. When the bristle bundles 5111 are deformed by pressure, they can have a larger deformation space, can bend and adapt to the shapes of surfaces at different positions in the oral cavity more flexibly, better fit different areas in the oral cavity, and improve the cleaning effect.

[0150] See also Figure 2 , Figure 8 and Fig.15 In some embodiments, the maximum spacing Lmax between adjacent tufts 5111 of each brush filament group 51 is less than the minimum spacing Smin between tufts 5111 between adjacent brush filament groups 51. For example, in the tufts 5111 of the first brush filament group 511 and the second brush filament group 513, for the tufts 51111 in the first brush filament group 511, the tufts 51112 and tufts 51113 are adjacent to the tufts 51111 in the first brush filament group 511. The spacing between the tufts 51111 and tufts 51112 is L1, and the spacing between the tufts 51111 and tufts 51113 is L2. Assume that L1 is greater than L2. In the adjacent second brush filament group 513, the tufts 51111 are adjacent to the tufts 51114, tufts 51115, tufts 51116, and tufts 51117.

[0151] The distance between the tufts 51111 and 51114 is S1, the distance between the tufts 51111 and 51115 is S2, the distance between the tufts 51111 and 51116 is S3, and the distance between the tufts 51111 and 51117 is S4. Assume S2 < S1 < S3 < S4. Therefore, for the tuft 51111, the maximum distance Lmax between adjacent tufts 5111 in the first bristle tuft group 511 is the distance L1 between the tufts 51111 and 51112, and the minimum distance Smin between the tufts 5111 in the adjacent second bristle tuft group 513 and the tuft 51111 is the distance S2 between the tufts 51111 and 51115. At this time, L1 < S2 is satisfied.

[0152] When the distance between adjacent tufts 5111 in each bristle tuft group 51 is less than the distance between the tufts 5111 between adjacent bristle tuft groups 51, the interaction between different bristle tuft groups 51 is reduced, and the influence of the bristle tuft group 51 on the deformation of the brush body 30 can be reduced. When the electric toothbrush head 100 is deformed inward under force during the cleaning process, the adjacent bristle tuft groups 51 will not interfere with each other, and the tufts 5111 between the adjacent bristle tuft groups 51 will not abut against each other to affect the deformation. On the other hand, the small distance between adjacent tufts 5111 in each bristle tuft group 51 can allow more tufts 5111 to be arranged in the same hair implanting part 31, improving the cleaning effect of the electric toothbrush head 100.

[0153] Please refer to Figure 2 and Figure 8 , in some embodiments, the distance between the tufts 5111 of adjacent bristle tuft groups 51 satisfies that when the brush body 30 bulges and deforms to the maximum from the side where the hair implanting surface 301 is located to the side where the back surface 305 is located, the length of the abutment between the tufts 5111 of adjacent bristle tuft groups 51 is not greater than 1 / 3 of any adjacent tuft 5111 in the adjacent bristle tuft groups 51.

[0154] 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.

[0155] See also Figure 2 and Figure 8 In some embodiments, the minimum distance between the bristle bundles 5111 of adjacent brush filament groups 51 ranges from [1.5 mm, 4.0 mm].

[0156] The value of the minimum distance between the hair 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 distance between the hair bundles 5111 between adjacent brush filament groups 51 is less than 1.5mm, the bristles 50 of the hair bundles 5111 between adjacent brush filament groups 51 will interfere with each other, affecting the flexibility of a single hair bundle 5111 during cleaning and reducing the cleaning efficiency of the brush filament group 51. At the same time, too small a distance between the hair bundles 5111 makes the brush filament group 51 too compact as a whole, which will put greater pressure on the part to be cared for when the electric toothbrush head 100 is working, causing physiological discomfort to the user. Since different brush filament groups 51 cover different areas of the part to be cared for, the area of ​​the part to be cared for corresponding to the gap between the brush filament groups 51 needs to be cleaned after the brush filament group 51 located around the gap is bent and deformed. When the minimum distance between the bristles 5111 of adjacent brush filament groups 51 is greater than 4.0 mm, the coverage area of ​​the electric toothbrush head 100 when cleaning the part to be cared for will be uneven, and some areas will not be covered. When the minimum distance between the bristles 5111 of adjacent brush filament groups 51 is in the range of [1.5 mm, 4.0 mm], the bristles 50 of the bristles 5111 between adjacent brush filament groups 51 will not interfere with each other, and a single bristle bundle 5111 is flexible during cleaning. The area to be cared for that corresponds to the gap between the brush filament groups 51 can be cleaned after the brush filament groups 51 around the gap, thereby achieving comprehensive cleaning of the area to be cared for.

[0157] See also Fig.16 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.

[0158] Please combine Figure 2 and Figure 3 , or combined Figure 8 and Fig. 9 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.

[0159] 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.

[0160] 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 at least two hair-implanted portions and at least one connecting portion, at least two of the hair-implanted portions being arranged in sequence and spaced apart in the length direction of the rod body, the hair-implanted portions comprising connected hair-implanted surfaces and peripheral side surfaces, the hair-implanted surfaces being provided with hair-implanted holes, the rod body being connected to the peripheral side surface of at least one of the hair-implanted portions, the connecting portion being arranged in the interval between two adjacent hair-implanted portions and being used to connect the two adjacent hair-implanted portions; and Bristles, the bristles are arranged in the bristle-implanting holes and extend from the bristle-implanting surface of the bristle-implanting portion, and when the bristles and / or the bristle-implanting portion are subjected to force, the connecting portion is deformed to drive the brush body to bend and deform; The hair-implanting portion also includes a back side opposite to the hair-implanting surface. 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-implanting surface is located, the first notch is used to provide an escape space for the hair-implanting portion; and / or, a second notch is formed between adjacent hair-implanting portions. When the brush body convexly deforms from the side where the hair-implanting surface is located toward the side where the back side is located, the second notch is used to provide an escape space for the bristles.

2. The electric toothbrush head according to claim 1, 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 implanting 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.

3. The electric toothbrush head according to claim 1, characterized in that: The hair-implanting portion further comprises a back side opposite to the hair-implanting surface, and the deformation of the connecting portion can drive the brush body to bend and deform toward the side where the hair-implanting surface is located and toward the side where the back side is located.

4. The electric toothbrush head according to claim 3, characterized in that: The bendable amount of the brush body when bending and deforming toward the side where the hair-planting surface is located is smaller than the bendable amount of the brush body when bending and deforming toward the side where the back surface is located.

5. The electric toothbrush head according to claim 1, characterized in that: The hair-planting portion also includes a back side opposite to the hair-planting surface; 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.

6. The electric toothbrush head according to claim 1, characterized in that: The hair-implanting portion further includes a back side opposite to the hair-implanting surface, and in the thickness direction of the brush body, a distance between the connecting portion and the hair-implanting surface is greater than a distance between the connecting portion and the back side.

7. The electric toothbrush head according to claim 1, characterized in that: The at least two hair implanting parts include a first hair implanting part connected to the rod body and a second hair implanting part farthest from the rod body in the length direction of the rod body, and the hair implanting surface area of ​​the first hair implanting part is larger than the hair implanting surface area of ​​the second hair implanting part.

8. The electric toothbrush head according to claim 1, characterized in that: At least two of the hair implanting parts include a first hair implanting part connected to the rod body, a second hair implanting part farthest from the rod body in the length direction of the rod body, and a third hair implanting part located between the first hair implanting part and the second hair implanting part, the hair implanting surface area of ​​the third hair implanting part is larger than the hair implanting surface area of ​​the first hair implanting part, and the hair implanting surface area of ​​the third hair implanting part is larger than the hair implanting surface area of ​​the second hair implanting part.

9. The electric toothbrush head according to claim 8, characterized in that: The thickness of the third hair implantation portion is greater than the thickness of the first hair implantation portion, and the thickness of the third hair implantation portion is greater than the thickness of the second hair implantation portion.

10. The electric toothbrush head according to claim 7 or 8, characterized in that: The thickness of the first hair-implanted portion is greater than the thickness of the second hair-implanted portion.

11. The electric toothbrush head according to claim 1, 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.

12. The electric toothbrush head according to claim 11, 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.

13. The electric toothbrush head according to claim 11, 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.

14. The electric toothbrush head according to claim 1, 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.

15. The electric toothbrush head according to claim 1, 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.

16. The electric toothbrush head according to claim 15, 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.

17. The electric toothbrush head according to claim 15, characterized in that: The deformation part is soft rubber.

18. The electric toothbrush head according to claim 1, characterized in that: The bristles include at least two bristle groups corresponding to at least two bristle implantation parts, and each bristle group includes at least two bristle bundles; At least two of the brush filament groups are arranged at intervals; and / or, in the same brush filament group, at least two of the bristle bundles are arranged at intervals.

19. The electric toothbrush head according to claim 18, characterized in that: The maximum distance between adjacent bristle bundles of each brush filament group is smaller than the minimum distance between adjacent bristle bundles of each brush filament group; and / or The distance between the hair bundles of adjacent brush filament groups satisfies that: when the brush body is deformed to the maximum from the side where the hair implantation surface is located toward the side away from the hair implantation surface, 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; and / or The minimum distance between the bristle bundles of adjacent brush filament groups ranges from [1.5 mm to 4.0 mm].

20. An electric toothbrush, characterized in that: include: The electric toothbrush head according to any one of claims 1 to 19, and A brush handle, wherein the electric toothbrush head is mounted on the brush handle.

Images