Brush head and electric toothbrush

Abstract

A brush head and an electric toothbrush, comprising a brushing part and a brush plate, the brushing part comprising a first brushing part and a second brushing part, the first brushing part being arranged on at least one side of the second brushing part along the width direction of the brush head; the brush plate is provided with a bristle implanting hole, the brushing part is arranged in the bristle implanting hole and extends outward from the bristle implanting hole; in the orthographic projection of the first brushing part and the second brushing part along the length direction of the brush plate, the first brushing part forms a first projection, and the second brushing part forms a second projection; wherein, the first projection and the second projection are spaced apart from each other in the width direction of the brush head; or, the first projection and the second projection partially overlap, and the maximum length of the overlapping part of the first projection and the second projection along the width direction of the brush head is L1, the length of the first projection as a whole along the width direction of the brush head is L2, and L1:L2≤0.5.

Description

Technical Field

[0001] This application relates to the field of oral hygiene technology, and more particularly to a brush head and an electric toothbrush. Background Technology

[0002] As people's living standards improve, personal hygiene and health are receiving more and more attention. Therefore, a convenient, effortless toothbrush with good cleaning power will become increasingly popular among users.

[0003] Current toothbrushes typically focus on cleaning the occlusal and lateral surfaces of teeth, neglecting other areas. For example, the proximal surfaces of teeth are usually convex, creating a concave area between two teeth. Conventional brush heads primarily clean the outer, inner, and occlusal surfaces of teeth, failing to reach this concave area. This allows food debris to remain in this area after brushing.

[0004] Currently, the main methods for cleaning concave areas include using toothpicks, dental floss, or water flossers to clean the concave areas while rinsing between teeth. However, toothpicks and dental floss are small in size and designed specifically for interdental structures, while concave areas are surface structures. Therefore, thoroughly cleaning concave areas with toothpicks and dental floss is quite cumbersome. Although water flossers cover a larger area, they add an extra cleaning step on top of brushing, and some users are not familiar with their operation, resulting in lower adoption rates.

[0005] With the high incidence of interproximal caries among users, there is an urgent need to provide a convenient and user-acceptable solution for cleaning concave areas. Utility Model Content

[0006] This application provides a brush head and an electric toothbrush, which aims to solve at least one of the technical problems existing in the prior art.

[0007] According to a first aspect of this application, a brush head is provided, comprising: a brushing portion including a first brushing portion and a second brushing portion, the first brushing portion being disposed on at least one side of the second brushing portion along the width direction of the brush head; a brush plate having bristle implantation holes, the brushing portion being disposed in the bristle implantation holes and extending outward from the bristle implantation holes; in the orthographic projections of the first brushing portion and the second brushing portion along the length direction of the brush plate, the first brushing portion forms a first projection, and the second brushing portion forms a second projection; wherein the first projection and the second projection are spaced apart from each other in the width direction of the brush head; or, the first projection and the second projection partially overlap, and the overlap between the first projection and the second projection is... The maximum length of the combined portion along the width direction of the brush head is L1, and the length of the first projection along the width direction of the brush head is L2, where L1:L2≤0.5; wherein, the side of the first brushing portion away from the hair-planting hole is a first end face, and the first end face includes a first high portion, which is higher than other areas of the first end face; in the orthographic projections of the first brushing portion and the second brushing portion along the width direction of the brush plate, the first brushing portion forms a third projection, and the second brushing portion adjacent to the first brushing portion in the length direction forms a fourth projection, and the outline of the first high portion in the third projection is higher than the outline formed by the side of the fourth projection away from the hair-planting hole.

[0008] First, it's important to understand that the sides of the teeth together form the dental arch, which creates concave gaps between the teeth. Therefore, the first brushing tool mentioned above is primarily used to reach into these gaps when brushing the sides of the teeth, cleaning the tooth surfaces there. The sides of the teeth are those facing the cheek or the tongue.

[0009] The above-described design allows the first brushing part to elastically deform towards the second brushing part to form a clamping structure. This allows it to better conform to the concave tooth surface formed by the proximal surfaces of the teeth, effectively cleaning the concave areas. The second brushing part can then clean the outer, inner, and occlusal surfaces of the teeth, ensuring the basic cleaning efficiency of the brush head. Specifically, the first raised portion is higher than other areas of the first end face, and its contour line in the third projection is higher than the contour line formed by the side of the first raised portion away from the bristle implant in the fourth projection. This prevents the second brushing part from forming two points of support, thus avoiding the first brushing part's end face being unable to enter the interdental spaces. This not only minimizes the influence of the second brushing part on the first brushing part, allowing the first brushing part to independently clean the interdental spaces, but also allows the first raised portion to better adapt to the interdental spaces. When cleaning the proximal surfaces, the first raised portion can penetrate deep into the interdental spaces and move along them, contributing to improved cleaning power. Specifically, the first and second brushing sections are single components made of bristle bundles or soft materials such as silicone. When brushing the chewing surfaces with a toothbrush, and the user applies pressure to the toothbrush, the first brushing section, being further outward in width than the second brushing section, can more easily enter the concave area between two teeth, better conforming to the tooth surface in the concave area. As the brush head moves back and forth, the first brushing section can rub the tooth surface in the concave area, effectively cleaning the interproximal surfaces of teeth without the need for auxiliary tools, thus alleviating the problem that existing brush heads cannot clean the interproximal surfaces of teeth.

[0010] Furthermore, while some existing brush heads feature side bristles on either side, these bristles are too close to the central bristles in space, resulting in almost identical brushing areas for both. Firstly, the side bristles are not positioned to fit the interdental spaces, making it difficult for them to reach them. Secondly, since much of the side bristles also brush the occlusal and lateral surfaces of the teeth, this means that a significant portion of the side bristles is deformed by the pressure of the teeth during brushing. When these deformed bristles pass through the interdental spaces, they are still affected by the adjacent teeth and cannot return to their original shape, making it difficult for them to reach the spaces. The undeformed side bristles, however, do not contact the teeth and therefore do not reach the concave interdental spaces. In conclusion, existing toothbrushes, lacking clear spacing between bristles, cause the side bristles to be affected by the teeth, making it difficult for them to reach and clean the interdental spaces. In this solution, to enable the first brushing part to effectively enter the interdental spaces, the solution uses a technique where the first and second projections are spaced apart along the width of the brush head. This creates a clear area gap between the first and second brushing parts, resulting in distinct brushing paths. Consequently, the first brushing part experiences less interference from the occlusal surface and tooth lateral surface during brushing compared to existing technologies, making it easier for the first brushing part to completely enter the interdental spaces. The brushing path is roughly the path formed by the movement of the first and second brushing parts as the brush head moves along its length. Alternatively, based on the technical solution of L1:L2<0.5, although the brushing paths of the first brushing part and the second brushing part partially overlap, the overlapping part accounts for a small proportion of the first brushing part. Therefore, the first brushing part is less affected by the resistance from the occlusal surface and the tooth lateral surface during brushing, as well as by the interference from the second brushing part, compared to the prior art. Even if the first brushing part is deformed by the pressure of the teeth, its rate of returning to its original position is faster than that of the prior art, which causes the entire first brushing part to enter the concave area and achieve in-depth cleaning of the concave area, effectively improving the cleaning ability of the brush head on the proximal surfaces of the teeth.

[0011] In one embodiment of the brush head of this application, there is a gap between the first brushing part and the second brushing part to provide free space for the first brushing part to move freely when under pressure, thus avoiding interference between them when cleaning the oral cavity. Specifically, when the second brushing part moves to the tooth surface corresponding to the interdental space, the first brushing part is suspended in the air because it is aligned with the interdental space, and therefore can enter the interdental space. However, since different users have different tooth sizes and brushing habits, when some users brush the occlusal surface, the second brushing part may deviate from the brushing position intended by the designer. This may cause the first brushing part to be located above the occlusal surface and unable to perfectly align with the interdental space. Once the first brushing part is located in a position against the occlusal surface, it is difficult for the first brushing part to completely enter the interdental space. Therefore, by pre-setting a gap between the first and second brushing parts, a certain amount of clearance can be provided between the second and first brushing parts. This not only alleviates the problem of interference between the first and second brushing parts when cleaning the oral cavity due to the brushing position not being in the preset position, but also buffers the pressure of the first brushing part on the occlusal surface and provides the first brushing part with a rebound space.

[0012] In the brush head of one embodiment of this application, the minimum width of the gap is greater than or equal to 0.5 mm and less than or equal to 1 mm. This not only alleviates the problem of mutual interference between the first and second brushing parts when cleaning the oral cavity, and avoids the risk of the gums colliding with the brush plate due to an excessively wide gap, but also prevents the cleaning function of the first brushing part from being lost due to an excessively small gap. Furthermore, it helps the gap absorb the pressure applied to the first brushing part, reducing mechanical damage to the gums.

[0013] In one embodiment of the brush head of this application, a portion of the first brushing part protrudes towards one side of the second brushing part to form a protrusion. When the user brushes the occlusal surface with the toothbrush, the user applies pressure to the toothbrush so that the protrusion can form a natural insertion effect towards the concave area under the action of the pressure. As the brush head moves back and forth, the protrusion rubs against the tooth surface of the concave area, thereby effectively cleaning the interproximal surfaces of the teeth without the need for auxiliary tools, thus alleviating the problem that existing brush heads cannot clean the interproximal surfaces of teeth or have difficulty reaching the gaps.

[0014] In a brush head according to one embodiment of this application, the shape of the projection of the protrusion in the orthographic projection along the thickness direction of the brush head includes any one of a triangular shape, a U-shaped shape, a C-shaped shape, or an arc shape, which basically matches the shape formed by the gap between teeth so that it can be inserted into the gap between teeth on the occlusal surface, thereby achieving precise adaptation to different gaps between teeth.

[0015] In one embodiment of the brush head of this application, the first brushing part includes a connecting end and a free end connected to the brush plate. The distance between the free end and the second brushing part is smaller than the distance between the connecting end and the second brushing part. This differential distance creates a progressive adaptive cleaning effect, which can automatically match the size differences of different concave areas. When cleaning the interdental area, the first brushing part has a larger distance between the connecting end and the second brushing part, avoiding the problem that the tooth surface may press against the free end of the first brushing part due to insufficient space, thus affecting the brushing effect of the first brushing part. This achieves a seamless transition from precise positioning at the free end to powerful cleaning at the connecting end. Furthermore, the progressive pressure distribution from the free end to the connecting end reduces the risk of gingival damage.

[0016] In a brush head according to one embodiment of this application, the first brushing part is inclined from the connecting end toward the free end toward the direction closer to the second brushing part, so that most of the deformation capability of the first brushing part is concentrated at the free end, thereby enabling the deflection angle of the first brushing part to be adaptively adjusted according to the width of the interdental space, and also limiting the first brushing part from excessively entering the interdental space.

[0017] In a brush head according to one embodiment of this application, the orthographic projection of the free end of the first brushing part along the length direction of the brush plate is a first projection line. Wherein, the first projection line and the second projection line are spaced apart from each other in the width direction of the brush head; thus, a clear area gap is formed between the first brushing part and the second brushing part, and the brushing paths of the first brushing part and the second brushing part are significantly different. Therefore, the first brushing part experiences less interference from the occlusal surface and tooth lateral surface during brushing compared to the prior art, and the first brushing part can more easily and completely enter the interdental spaces; wherein, the brushing path is roughly the path formed by the movement of the first brushing part and the second brushing part when the brush head moves along the length direction. Alternatively, the first projection line and the second projection portion overlap, and the length of the overlapping portion of the first projection line and the second projection along the width direction of the brush head is L3, and the length of the first projection line as a whole along the width direction of the brush head is L4, where L3:L4≤0.5. Although the brushing paths of the first brushing part and the second brushing part partially overlap, the overlapping portion accounts for a small proportion of the first brushing part. Therefore, the first brushing part experiences less interference from the occlusal surface and the tooth lateral surface during brushing, as well as less interference from the second brushing part compared to the prior art. Even if the first brushing part is deformed by the pressure of the teeth, its rate of returning to its original position is faster than that of the prior art, prompting the entire first brushing part to enter the concave area and achieve in-depth cleaning of the concave area, effectively improving the brush head's cleaning ability on the proximal surfaces of the teeth.

[0018] In a brush head according to one embodiment of this application, a brushing path is formed when the free end of the second brushing part moves along the length direction of the brush head; the orthographic projection of the brushing path along the thickness direction of the brush head is a fifth projection, and the orthographic projection of the free end of the first brushing part along the thickness direction of the brush head is a sixth projection. The fifth projection and the sixth projection are spaced apart, creating a clear area separation between the first and second brushing sections. The brushing paths of the first and second brushing sections are significantly different. Therefore, the first brushing section experiences less interference from the occlusal surface and tooth lateral surface during brushing compared to existing technologies, allowing it to more easily and completely enter the interdental spaces. The brushing path is approximately the path formed by the movement of the first and second brushing sections as the brush head moves along its length. Alternatively, a portion of the sixth projection overlaps with the fifth projection, and the area of ​​the overlapping portion is S1. The area of ​​the shadow is S2, S1:S2≤0.5. Although the brushing paths of the first brushing part and the second brushing part partially overlap, the overlapping part accounts for a small proportion of the first brushing part. Therefore, the first brushing part is less affected by the resistance from the occlusal surface and the tooth lateral surface and by the interference from the second brushing part during brushing compared to the prior art. Even if the first brushing part is deformed by the pressure of the teeth, its rate of returning to its original position is faster than that of the prior art, which causes the entire first brushing part to enter the concave area and achieve in-depth cleaning of the concave area, effectively improving the cleaning ability of the brush head on the proximal surfaces of the teeth.

[0019] In a brush head according to one embodiment of this application, the brush plate includes a main board and a side plate. The side plate is disposed on at least one side of the main board in the width direction. The first brushing part is disposed on the side plate, and the second brushing part is disposed on the main board. The side plate and the main board are flexibly connected, allowing the side plate to move relative to the main board. This enables the side plate to move towards the main board under brushing pressure and form a clamping structure. The movable side plate provides greater movement space for the first brushing unit, allowing it to make greater displacements and increasing the probability of the first brushing unit accurately entering the gaps between teeth.

[0020] In a brush head according to one embodiment of this application, the main board has side plates on both sides along its width direction. The side plates on both sides are symmetrically arranged with respect to the central axis of the brush plate, and each side plate on both sides is provided with a first brushing part. The first brushing parts on both sides are symmetrically arranged with respect to the central axis of the brush plate. On the one hand, when users brush their teeth, they usually brush along the direction of tooth arrangement, and the gaps between teeth are often symmetrical with respect to the direction of tooth arrangement. Therefore, this arrangement is just right to match the distribution pattern of the gaps between teeth. On the other hand, it allows the brushing pressure to be evenly distributed along the central axis, avoiding gum damage caused by concentrated cleaning force.

[0021] In a brush head according to one embodiment of this application, there is a first gap between the side plate and the main plate to ensure the movement space between the side plate and the main plate, so that the first brushing part on the side plate can more easily adapt to deformation and is not deformed by the deformation of the main plate, thereby being able to better penetrate into the tooth gaps.

[0022] In the brush head of one embodiment of this application, the width of the first gap is greater than or equal to 0.5 mm and less than or equal to 1 mm, so as to ensure that when the side plate is fully close to the main plate, the lateral deformation of the first brush part on the side plate will not exceed the safe range, preventing excessive displacement from causing the first brush part to collide with the second brush part, and also preventing food residues from getting stuck in the first gap.

[0023] In the brush head of one embodiment of this application, the brush plate further includes a connecting arm. The side plate is connected to both sides of the main board through the connecting arm, realizing the cantilever beam dynamic support of the side plate. While maintaining a high degree of freedom of movement, it also ensures the reliability of the mechanical connection and can realize the energy storage and release function through the elastic deformation of the connecting arm, so that the side plate can be reset after deformation.

[0024] Alternatively, an elastic filler is connected in the gap between the side plate and the main board so that the energy storage and release functions can be realized through the elastic deformation of the elastic filler, so that the side plate can be reset after deformation.

[0025] In a brush head according to one embodiment of this application, the brush plate further includes a connecting arm, and the side plate is connected to both sides of the main board via the connecting arm; The ratio of the thickness of the connecting arm to the thickness of the motherboard is greater than or equal to 0.15 and less than or equal to 0.25. This not only ensures that the rigidity of the motherboard can maintain the directional movement of the side plate so that the motherboard will not deform when the side plate moves toward it, but also prevents the side plate from being too flexible due to excessive thickness of the connecting arm.

[0026] In one embodiment of the brush head, the first high portion is higher than the two sides of the first end face in the length direction, allowing the first high portion to form a central ridge-like protrusion in the length direction. The two sides gradually decrease in height, so that when brushing, the apex of the first high portion first contacts the tooth surface and generates a vertical force, thereby cleaning the occlusal surface; the two sides then contact, forming a horizontal force, thereby expanding the cleaning of the interdental spaces. And / or, the first high portion is higher than the area of ​​the first end face away from the second brushing portion in the width direction, so that when brushing force is applied, the first high portion can act as a fulcrum to generate a torque effect, causing the entire first brushing portion to bend towards the second brushing portion. Furthermore, the offset design of the first high portion towards the second brushing portion allows the first high portion to form a conformal contact with the interdental slope, increasing the contact area.

[0027] In one embodiment of the brush head, the height of the first brushing part is lower than the height of the second brushing part adjacent to the first brushing part in the width direction, so that the brush head can form a two-stage cleaning structure. This not only enables the synergistic work of the powerful stain removal of the second brushing part and the precise care of the first brushing part, but also avoids the mutual interference caused by the first brushing part and the second brushing part being pressed at the same time.

[0028] In a brush head according to an embodiment of this application, a first curved surface and a second curved surface are respectively formed on both sides of the first end face along the length direction. The first curved surface is formed on the side of the first high part facing the brush handle and is in the shape of an outwardly convex arc. The second curved surface is formed on the side of the first high part facing away from the brush handle and is in the shape of an inwardly concave arc. This allows the first curved surface to guide the first brushing part to slide into the gap between teeth, while the second curved surface can generate a negative pressure adsorption effect when the first brushing part exits the gap between teeth, thus realizing a technological leap from passive contact to active adaptation of the toothbrush.

[0029] In one embodiment of the brush head, the brush head further includes a brush handle, which includes a cleaning section and an extension section for connecting to the handle of an electric toothbrush. The end of the main board away from the extension section is connected to the extension section through the cleaning section, so that the side plate and the main board can perform vibration cleaning of the teeth at different levels.

[0030] In a brush head according to one embodiment of this application, the cleaning section has a connecting protrusion at one end away from the extension section. The connecting protrusion is connected to the main board away from the extension section to achieve a fixed connection with the main board, and to make the cleaning section have a preset distance of not less than zero between the side plate and part of the main board, so as to allow the side plate and part of the main board to deform.

[0031] According to a second aspect of this application, an electric toothbrush is provided, including a handle and the aforementioned brush head, wherein the brush head is connected to the handle via the brush shaft.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a brush head provided in one embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of the brush head from another angle; Figure 3 yes Figure 1 An exploded view of the hard plastic parts and soft plastic parts in the design; Figure 4 yes Figure 3 A partial exploded view of the brush head; Figure 5 yes Figure 3 A schematic diagram of the brushing section and brush plate in the middle; Figure 6 yes Figure 5 A schematic diagram of the orthographic projection of the brushing section along the thickness direction of the brush plate; Figure 7 yes Figure 5 A schematic diagram of the orthographic projection of the brushing section along the width of the brush plate; Figure 8 yes Figure 5 A schematic diagram of the orthographic projection of the brushing section along the length of the brush plate; Figure 9 yes Figure 5 A schematic diagram of the brushing path in the first brushing section; Figure 10 yes Figure 5 A schematic diagram of the brushing path in the second brushing section; Figure 11 yes Figure 5 A schematic diagram of the brush plate structure; Figure 12 yes Figure 6 A cross-sectional view of the brush plate at point AA.

[0035] Explanation of reference numerals in the attached figures: 100. Brush head; 10. Brushing section; 11. First brushing section; 11a. First projection; 11b. First projection line; 11c. Third projection; 11d. Sixth projection; 111. Protrusion; 112. Free end; 113. Connecting end; 114. First end face; 1141. First high section; 1142. First curved surface; 1143. Second curved surface; 12. Second brushing section; 12a. Second projection; 12b. Fourth projection; 12c. Fifth projection; 20. Brush plate; 21. Main board; 22. Side plate; 23. Hair implantation hole; 231. First hair implantation hole; 232. Second hair implantation hole; 24. Connecting arm; 30. Brush handle; 30a. Hard rubber part; 30b. Soft rubber part; 31. Extension section; 32. Cleaning section; 321. Connecting protrusion. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] It should also be understood that the terminology used in this application specification is merely for describing specific realities within the scope of this application. It is important to understand that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] Please see Figure 1 , Figure 1 This is a schematic diagram of a brush head provided in an embodiment of this application. The brush head can be applied to various types of electric toothbrushes; of course, the brush head can also be used independently or applied to ordinary non-powered toothbrushes, and this application does not impose any limitations.

[0040] Among them, electric toothbrushes have driving power. When the brush head is used in an electric toothbrush, it can be connected to the handle of the electric toothbrush so that the handle can drive the brush head to vibrate, thereby achieving oral cleaning.

[0041] like Figures 1 to 3As shown, according to a first aspect of this application, this application provides a brush head 100, including a brush handle 30, a brush plate 20, and a brushing part 10 connected to the brush plate 20. The brushing part 10 extends outward from the brush plate 20. The brush plate 20 is connected to one end of the brush handle 30, and the other end of the brush handle 30 is detachably connected to one end of the handle of an electric toothbrush, so that the user can complete the brushing action by holding the handle and causing the drive shaft inside the handle to drive the brushing part 10 to move.

[0042] In one alternative implementation, such as Figure 3 and Figure 4 As shown, the brush handle 30 includes a hard plastic part 30a and a soft plastic part 30b with a hardness less than that of the hard plastic part 30a. The soft plastic part 30b covers at least part of the peripheral surface of the hard plastic part 30a and the brush plate 20, making the contact between the brush handle 30 and the teeth gentler and avoiding collision between the hard plastic part 30a or the brush plate 20 and the teeth, thus improving the user's brushing comfort.

[0043] In one alternative implementation, such as Figure 3 and Figure 4 As shown, the soft rubber part 30b is wrapped around the outer side of the hard rubber part 30a and at least part of the peripheral side of the brush plate 20 through a secondary injection molding process, so that the soft rubber part 30b, the hard rubber part 30a and at least part of the brush plate 20 can be bonded together as a whole.

[0044] In one alternative implementation, such as Figures 4 to 6 As shown, the brushing section 10 includes a first brushing section 11 and a second brushing section 12. The first brushing section 11 is disposed on at least one side of the second brushing section 12 along the width direction of the brush head 100. The width of the brush head 100 refers to the longest distance of the brush plate 20 along the length direction perpendicular to the brush handle 30. The width direction is perpendicular to the extension direction of the brush handle 30. This not only allows the second brushing section 12 to cover the buccal surfaces of multiple teeth and brush the large surfaces of the occlusal surfaces, but also ensures that the protrusion 111 of the first brushing section 11 can accurately fall into the concave area formed by the adjacent surfaces of the teeth and brush the positions on both sides of the occlusal surfaces.

[0045] In one alternative implementation, such as Figures 4 to 6 As shown, the brush plate 20 is provided with bristle implantation holes 23, and the brushing part 10 is disposed in the bristle implantation holes 23 and extends outward from the bristle implantation holes 23 for cleaning teeth. The brushing part 10 can be a bristle bundle composed of multiple bristles, a single component made of a soft material such as silicone, or any other structural form suitable for brushing teeth. No particular limitation is made here; any structural form used in the prior art can be a specific structural form of the brushing part 10. The protrusion 111 can be of various shapes, such as the angular shape shown in the figure, and is not specifically limited in this embodiment. It can also be other protruding shapes.

[0046] In one alternative implementation, such as Figures 4 to 6 As shown, in the orthographic projections of the first brushing part 11 and the second brushing part 12 along the length direction of the brush plate 20, the first brushing part 11 forms a first projection 11a, and the second brushing part 12 forms a second projection 12a. The first projection 11a and the second projection 12a are spaced apart from each other in the width direction of the brush head 100, so that there is a clear area gap between the first brushing part 11 and the second brushing part 12, thereby forming distinct brushing paths. Therefore, the first brushing part 11 experiences less interference from the occlusal surface and tooth lateral surface during brushing compared to the prior art, and the first brushing part 11 can more easily and completely enter the interdental spaces. The brushing path is roughly the path formed by the movement of the first brushing part 11 and the second brushing part 12 when the brush head 100 moves along the length direction.

[0047] Alternatively, the first projection 11a and the second projection 12a partially overlap, and the maximum length of the overlapping portion of the first projection 11a and the second projection 12a along the width direction of the brush head 100 is L1, and the overall length of the first projection 11a along the width direction of the brush head 100 is L2, where L1:L2≤0.5. Although the brushing paths of the first brushing part 11 and the second brushing part 12 partially overlap, the overlapping portion accounts for a small proportion of the first brushing part 11. Therefore, the first brushing part 11 experiences less interference from the occlusal surface and the tooth lateral surface, as well as less interference from the second brushing part 12, compared to the prior art. Even if the first brushing part 11 is deformed by the pressure of the teeth, its rate of returning to its original position is faster than that of the prior art, causing the entire first brushing part 11 to enter the concave area and achieve deep cleaning of the concave area, effectively improving the cleaning ability of the brush head 100 on the proximal surfaces of the teeth.

[0048] With the above solution, when brushing teeth, the first brushing part 11 can elastically deform towards the second brushing part 12 to form a clamping structure, thereby better conforming to the tooth surface of the concave area formed by the adjacent surfaces of the teeth, so as to clean the tooth surface of the concave area. The second brushing part 12 can clean the outer surface, inner surface and occlusal surface of the teeth, so as to ensure the basic cleaning efficiency of the brush head 100.

[0049] Specifically, the first brushing part 11 and the second brushing part 12 are single components made of bristle bundles composed of multiple bristles or soft materials such as silicone. When the toothbrush is used to clean the occlusal surface, and the user applies pressure to the toothbrush while brushing, the first brushing part 11 is located further outward in the width direction than the second brushing part 12, making it easier to enter the concave area formed between the two teeth. It better conforms to the tooth surface in the concave area, and with the back-and-forth movement of the brush head 100, the first brushing part 11 can rub the tooth surface in the concave area, thereby effectively cleaning the interproximal surfaces of the teeth without the need for auxiliary tools, thus alleviating the problem that existing brush heads 100 cannot clean the interproximal surfaces of teeth.

[0050] Furthermore, although some brush heads 100 in the existing technology have side bristles on both sides, the side bristles are too close to the central bristles in spatial position, resulting in almost identical brushing ranges for both. On the one hand, because the position of the side bristles is not adapted to the position of the interdental spaces, they have difficulty entering them. On the other hand, since most of the side bristles also participate in brushing the occlusal and lateral surfaces of the teeth, most of these areas are deformed due to the pressure from the teeth during brushing. When these deformed side bristles pass through the interdental spaces, they cannot return to their original shape because they are still affected by the adjacent teeth. Therefore, these side bristles have difficulty entering the interdental spaces, while the undeformed side bristles do not contact the teeth and will not reach the concave interdental spaces.

[0051] As can be seen from the above, existing toothbrushes, due to the lack of clear intervals between bristles, cause the side bristles to be affected by the teeth and have difficulty entering and cleaning between teeth. In this solution, in order to enable the first brushing part 11 to effectively enter the interdental space, this solution uses a technical solution where the first projection 11a and the second projection 12a are spaced apart in the width direction of the brush head 100, so that there is a clear interval between the first brushing part 11 and the second brushing part 12. The brushing paths of the first brushing part 11 and the second brushing part 12 are significantly different. Therefore, the first brushing part 11 experiences less interference from the occlusal surface and the lateral surface of the teeth during brushing compared to the existing technology, and the first brushing part 11 can more easily and completely enter the interdental space. Alternatively, based on the technical solution of L1:L2≤0.5, although the brushing paths of the first brushing part 11 and the second brushing part 12 partially overlap, the overlapping part accounts for a small proportion of the first brushing part 11. Therefore, the first brushing part 11 experiences less interference from the occlusal surface and the tooth lateral surface, as well as less interference from the second brushing part 12 during brushing compared to the prior art. Even if the first brushing part 11 is deformed by the pressure of the teeth, its rate of returning to its original position is faster than that of the prior art, which enables the first brushing part 11 to enter the concave area and achieve in-depth cleaning of the concave area, effectively improving the cleaning ability of the brush head 100 on the proximal surfaces of the teeth.

[0052] In one alternative implementation, such as Figure 4 , Figure 7 and Figure 8 As shown, the side of the first brushing part 11 away from the hair implantation hole 23 is the first end face 114. The first end face 114 includes a first high part 1141, which is higher than other areas of the first end face 114. In the orthographic projection of the first brushing part 11 and the second brushing part 12 along the width direction of the brush plate, the first brushing part 11 forms a third projection 11b, and the second brushing part 12 adjacent to the first brushing part 11 in the length direction forms a fourth projection 12b. The outline of the first high part 1141 in the third projection 11b is higher than the outline formed by the side of the fourth projection 12b away from the hair implantation hole 23. This not only allows the first brushing part 11 to be far enough away from the second brushing part 12 so that it can be independently cleaned between teeth, but also allows the first high part 1141 to adapt to the gaps between teeth. When brushing the adjacent surfaces of teeth, the first high part 1141 can penetrate deeper into the gaps between teeth and move along the gaps, which helps to improve cleaning power. Furthermore, the first high portion 1141 is higher than the second brushing portions 12 on both sides in the length direction. This is also to avoid the influence of the second brushing portions 12 on the first high portion 1141, preventing the second brushing portions 12 on both sides of the first high portion 1141 from forming two-point support, thus preventing the first high portion 1141 from entering the interdental space. In an optional embodiment, such as... Figure 4 , Figure 7 and Figure 8 As shown, the first high portion 1141 is higher than the two sides of the first end face 114 in the length direction, so that the first high portion 1141 can form a central ridge-shaped protrusion in the length direction, while the two sides gradually decrease, so that when brushing teeth, the apex of the first high portion 1141 first contacts the tooth surface and generates a vertical component force, thereby cleaning the occlusal surface; while the two sides then contact to form a horizontal component force, thereby expanding the cleaning of the interdental spaces.

[0053] In one alternative implementation, such as Figure 4 , Figure 7 and Figure 8 As shown, the first high portion 1141 is higher than the area of ​​the first end face 114 that is away from the second brushing portion 12 in the width direction, so that when brushing force is applied, the first high portion 1141 can act as a fulcrum to generate a torque effect, causing the entire first brushing portion 11 to bend towards the second brushing portion 12. In addition, the offset design of the first high portion 1141 towards the second brushing portion 12 allows the first high portion 1141 to form a conformal contact with the interdental slope, increasing the contact area.

[0054] In one alternative implementation, such as Figure 4 , Figure 7 and Figure 8As shown, the height of the first brushing part 11 is lower than the height of the second brushing part 12 adjacent to the first brushing part 11 in the width direction, so that the brush head can form a two-stage cleaning structure. This not only enables the powerful stain removal of the second brushing part 12 and the precise care of the first brushing part 11 to work together, but also avoids mutual interference caused by the first brushing part 11 and the second brushing part 12 being pressed at the same time.

[0055] For example, the second scrubbing section 12 includes a first sub-scrubbing section 121 and a second sub-scrubbing section 122. The first sub-scrubbing section 121 is disposed on both sides of the first scrubbing section 11 in the length direction, and the second sub-scrubbing section 122 is disposed on one side of the first scrubbing section 11 in the width direction. The height of the first sub-scrubbing section 121 is lower than the height of the first scrubbing section 11, and the height of the second sub-scrubbing section 122 is higher than the height of the first scrubbing section 11.

[0056] In one alternative implementation, such as Figure 4 , Figure 7 and Figure 8 As shown, a first curved surface 1142 and a second curved surface 1143 are formed on both sides of the first end face 114 along the length direction. The first curved surface 1142 is formed on the side of the first high part 1141 facing the brush handle 30 and is in the shape of an outwardly convex arc. The second curved surface 1143 is formed on the side of the first high part 1141 facing away from the brush handle 30 and is in the shape of an inwardly concave arc. This allows the first curved surface 1142 to guide the first brushing part 11 to slide into the interdental space, while the second curved surface 1143 can generate a negative pressure adsorption effect when the first brushing part 11 exits the interdental space, thus realizing a technological leap from passive contact to active adaptation of the brush head.

[0057] For example, the first and second curved surfaces can be either convex or concave. The convex curved surfaces can converge to improve cleaning, while the concave curved surfaces can adapt to the shape of the teeth so that they can automatically form a three-dimensional line contact during brushing, thus improving comfort.

[0058] In one alternative implementation, such as Figures 4 to 6 As shown, there is a gap D1 between the first brushing part 11 and the second brushing part 12, so as to provide a free space for the first brushing part 11 to move freely when it is pressed, and to avoid interference with the second brushing part 12 when cleaning the mouth.

[0059] Specifically, when the second brushing part 12 moves to the tooth surface corresponding to the interdental space, the first brushing part 11 is suspended in mid-air because it is aligned with the interdental space, thus allowing it to enter the interdental space. However, due to differences in tooth size and brushing habits among different users, the second brushing part 12 may deviate from the designer's intended brushing position when some users brush the occlusal surface. This can cause the first brushing part 11 to be positioned above the occlusal surface and unable to perfectly align with the interdental space. If the first brushing part 11 is positioned against the occlusal surface, it will be difficult for it to fully enter the interdental space. Therefore, a pre-set gap D1 between the first brushing part 11 and the second brushing part 12 provides a certain amount of clearance between them. This not only alleviates the problem of interference between the first brushing part 11 and the second brushing part 12 when cleaning the oral cavity due to the brushing position not being in the pre-set position, but also buffers the pressure of the first brushing part 11 on the occlusal surface and provides the first brushing part 11 with a rebound space.

[0060] In one alternative implementation, such as Figures 5 to 9 As shown, the minimum width of the gap D1 is greater than or equal to 0.5 mm and less than or equal to 1 mm. This not only alleviates the problem of mutual interference between the first brushing part 11 and the second brushing part 12 when cleaning the oral cavity, and avoids the risk of the gums hitting the brushing part 20 due to the gap being too wide, but also prevents the cleaning function of the first brushing part 11 from being lost due to the gap being too small. In addition, it is beneficial for the gap to absorb the pressure applied to the first brushing part 11 and reduce mechanical damage to the gums.

[0061] In one alternative implementation, such as Figures 5 to 9 As shown, the minimum width of the gap D1 is preferably 0.9 mm to ensure that the first brushing part 11 can quickly return to its original position after being deformed by pressure, thus allowing it to continuously penetrate deep into the interdental spaces. The 0.9 mm gap provides sufficient deformation space for the first brushing part 11 when the user applies excessive force, without causing insufficient support due to an excessively wide gap. Simultaneously, the 0.9 mm gap also minimizes the movement interference of the second brushing part 12 on the first brushing part 11, ensuring that both the first and second brushing parts 11 and 12 can still cover adjacent tooth surfaces without any blind spots when moving along the length of the brush head 100.

[0062] In one alternative implementation, such as Figures 5 to 9As shown, a portion of the side of the first brushing part 11 facing the second brushing part 12 protrudes towards the second brushing part 12 to form a protrusion 111. When the user brushes the occlusal surface with the toothbrush, the user applies pressure to the toothbrush so that the protrusion 111 can form a natural insertion effect towards the concave area under the action of the pressure. As the brush head 100 moves back and forth, the protrusion 111 rubs against the tooth surface of the concave area, thereby effectively cleaning the interproximal surfaces of the teeth without the need for auxiliary tools, thus alleviating the problem that the existing brush head 100 cannot clean the interproximal surfaces of the teeth or has difficulty reaching the gaps.

[0063] In an optional embodiment, in the orthographic projection of the brush head 100 along the thickness direction, the shape of the projection of the protrusion 111 includes any one of a triangular, U-shaped, C-shaped or arc shape, so that the protrusion 111 can basically match the shape formed by the gap between teeth, thereby better inserting into the gap between teeth on the occlusal surface, and thus achieving precise adaptation to different gaps between teeth.

[0064] In an optional embodiment, the first brushing section 11 includes a connecting end 113 connected to the brush plate 20 and a free end 112. The distance between the free end 112 and the second brushing section 12 is smaller than the distance between the connecting end 113 and the second brushing section 12. This differential distance creates a progressive adaptive cleaning effect, which can automatically match the size differences of different concave areas. When cleaning the interdental area, the first brushing section 11 has a larger distance between the connecting end 113 and the second brushing section 12, avoiding the problem that the tooth surface may press against the free end 112 of the first brushing section 11 due to insufficient space, thus affecting the brushing effect of the first brushing section 11. This achieves a seamless transition from the precise positioning of the free end 112 to the powerful cleaning of the connecting end 113. Furthermore, the progressive pressure distribution from the free end 112 to the connecting end 113 can reduce the risk of gingival damage.

[0065] In an optional embodiment, the first brushing part 11 is inclined from the connecting end 113 toward the free end 112 toward the direction close to the second brushing part 12, so that most of the deformation capability of the first brushing part 11 is concentrated at the free end 112, thereby enabling the deflection angle of the first brushing part 11 to be adaptively adjusted according to the width of the interdental space, and also limiting the first brushing part 11 from excessively entering the interdental space.

[0066] In one alternative implementation, such as Figures 5 to 8As shown, the orthographic projection of the free end 112 of the first brushing part 11 along the length direction of the brush plate 20 is the first projection line 11b. The first projection line 11b and the second projection 12a are spaced apart from each other in the width direction of the brush head 100, so that a clear area gap is formed between the first brushing part 11 and the second brushing part 12. The brushing paths of the first brushing part 11 and the second brushing part 12 are significantly different. Therefore, the first brushing part 11 is less affected by interference from the occlusal surface and the tooth lateral surface during brushing than in the prior art, and the first brushing part 11 can more easily and completely enter the interdental spaces. The brushing path is roughly the path formed by the movement of the first brushing part 11 and the second brushing part 12 when the brush head 100 moves along the length direction.

[0067] Alternatively, the first projection line 11b and the second projection 12a partially overlap, and the length of the overlapping portion of the first projection line 11b and the second projection 12a along the width direction of the brush head 100 is L3, and the length of the first projection line 11b as a whole along the width direction of the brush head 100 is L4, where L3:L4≤0.5. Although the brushing paths of the first brushing part 11 and the second brushing part 12 partially overlap, the overlapping portion accounts for a small proportion of the first brushing part 11. Therefore, the first brushing part 11 experiences less interference from the occlusal surface and the tooth lateral surface, as well as less interference from the second brushing part 12, compared to the prior art. Even if the first brushing part 11 is deformed by the pressure of the teeth, its rate of returning to its original position is faster than that of the prior art, causing the entire first brushing part 11 to enter the concave area and achieve in-depth cleaning of the concave area, effectively improving the cleaning ability of the brush head 100 on the proximal surfaces of the teeth.

[0068] In one alternative implementation, such as Figures 5 to 10 As shown, when the free end 112 of the second brushing part 12 moves along the length direction of the brush head 100, it forms a brushing path; the orthographic projection of the brushing path along the thickness direction of the brush head 100 is the fifth projection 12c, and the orthographic projection of the free end 112 of the first brushing part 11 along the thickness direction of the brush head 100 is the sixth projection 11d. The fifth projection 12c and the sixth projection 11d are spaced apart, so that a clear area gap is formed between the first brushing part 11 and the second brushing part 12. The brushing paths of the first brushing part 11 and the second brushing part 12 are significantly different. Therefore, the first brushing part 11 experiences less interference from the occlusal surface and the tooth lateral surface during brushing compared to the prior art, and the first brushing part 11 can more easily and completely enter the interdental spaces.

[0069] Alternatively, a portion of the sixth projection 11d coincides with the fifth projection 12c, and the area of ​​the overlapping portion is S1, while the area of ​​the sixth projection 11d is S2, where S1:S2≤0.5. Although the brushing paths of the first brushing part 11 and the second brushing part 12 partially overlap, the overlapping portion accounts for a small proportion of the first brushing part 11. Therefore, the first brushing part 11 experiences less interference from the occlusal surface and the tooth lateral surface, as well as less interference from the second brushing part 12, compared to the prior art. Even if the first brushing part 11 is deformed by the pressure of the teeth, its rate of returning to its original position is faster than that of the prior art, causing the entire first brushing part 11 to enter the concave area and achieve in-depth cleaning of the concave area, effectively improving the cleaning ability of the brush head 100 on the proximal surfaces of the teeth.

[0070] In one alternative implementation, such as Figure 5 , Figure 11 and Figure 12 As shown, the brush plate 20 includes a main board 21 and a side plate 22. The side plate 22 is disposed on at least one side of the main board 21 in the width direction. A first brushing part 11 is disposed on the side plate 22, and a second brushing part 12 is disposed on the main board 21. The side plate 22 and the main board 21 are flexibly connected so that the side plate 22 can move relative to the main board 21, thereby allowing the side plate 22 to move towards the main board 21 under the pressure of brushing and forming a clamping structure. The movable design of the side plate 22 also provides more movement space for the first brushing part 11, allowing the first brushing part 11 to make greater displacement, thereby increasing the probability that the first brushing part 11 accurately enters the interdental spaces.

[0071] In one alternative implementation, such as Figure 5 , Figure 11 and Figure 12 As shown, the mainboard 21 has side plates 22 on both sides along the width direction. The side plates 22 on both sides are symmetrically arranged with respect to the central axis of the brush plate 20, and each side plate 22 is provided with a first brushing part 11. The first brushing parts 11 on both sides are symmetrically arranged with respect to the central axis of the brush plate 20. On the one hand, when users brush their teeth, they usually brush along the direction of tooth arrangement, and the gaps between teeth are often symmetrical with respect to the direction of tooth arrangement. Therefore, this arrangement is just right to match the distribution pattern of the gaps between teeth. On the other hand, it allows the brushing pressure to be evenly distributed along the central axis, avoiding gum damage caused by concentrated cleaning force.

[0072] In an optional embodiment, the hair implantation hole 23 includes a first hair implantation hole 231 and a second hair implantation hole 232. The first hair implantation hole 231 is formed on the side plate 22, and the second hair implantation hole 232 is formed on the main plate 21. The first hair implantation hole 231 and the second hair implantation hole 232 are arranged along the width of the brush plate 20, so that the first brushing part 11 on the first hair implantation hole 231 can converge toward one side of the central axis, so as to better clean the occlusal surface.

[0073] In one alternative implementation, such as Figure 5 , Figure 11 and Figure 12 As shown, there is a first gap D2 between the side plate 22 and the main board 21 to ensure the movement space between the side plate 22 and the main board 21, so that the first brushing part 11 on the side plate 22 can more easily adapt to deformation and is not deformed by the deformation of the main board 21, thus it can better penetrate into the tooth gap.

[0074] In one alternative implementation, such as Figure 5 , Figure 11 and Figure 12 As shown, the width of the first gap D2 is greater than or equal to 0.5 mm and less than or equal to 1 mm, so as to ensure that when the side plate 22 is fully close to the main plate 21, the lateral deformation of the first brushing part 11 on the side plate 22 will not exceed the safe range, preventing excessive displacement from causing the first brushing part 11 to collide with the second brushing part 12, and also preventing food residues from getting stuck in the first gap.

[0075] In one alternative implementation, such as Figure 5 , Figure 11 and Figure 12 As shown, the brush plate 20 also includes a connecting arm 24. The side plate 22 is connected to both sides of the main board 21 through the connecting arm 24, realizing the cantilever beam dynamic support of the side plate 22. While maintaining a high degree of freedom of movement, it also ensures the reliability of the mechanical connection, and can realize the energy storage and release function through the elastic deformation of the connecting arm 24, so that the side plate 22 can be reset after deformation.

[0076] In an optional embodiment, an elastic filler is connected in the gap between the side plate 22 and the main plate 21 so that the energy storage and release functions can be realized through the elastic deformation of the elastic filler, so that the side plate 22 can be reset after deformation.

[0077] In an optional embodiment, the brush plate 20 further includes a connecting arm 24, through which the side plate 22 is connected to both sides of the main board 21. The ratio of the thickness H1 of the connecting arm 24 to the thickness H2 of the main board 21 is greater than or equal to 0.15 and less than or equal to 0.25. This not only ensures that the rigidity of the main board 21 can maintain the directional movement of the side plate 22 so that the main board 21 will not be deformed when the side plate 22 moves toward it, but also prevents the connecting arm 24 from being too thick, which would result in insufficient mobility of the side plate 22.

[0078] In one alternative implementation, such as Figures 1 to 4As shown, the brush handle 30 includes a cleaning section 32 and an extension section 31 for connecting to the handle of an electric toothbrush. The end of the main board 21 away from the extension section 31 is connected to the extension section 31 through the cleaning section 32, so that the side plate 22 and the main board 21 can perform vibration cleaning of the teeth at different levels.

[0079] In one alternative implementation, such as Figures 1 to 4 As shown, the cleaning section 32 has a connecting protrusion 321 at the end away from the extension section 31. The connecting protrusion 321 is connected to the main board 21 away from the extension section 31 so as to achieve a fixed connection between the cleaning section 32 and the main board 21, and to make the cleaning section 32 have a preset distance of not less than zero between the side plate 22 and part of the main board 21 so as to allow the side plate 22 and part of the main board 21 to deform.

[0080] According to a second aspect of this application, an electric toothbrush is provided, including a handle and the aforementioned brush head 100, the brush head 100 being connected to the handle via a brush rod 30.

[0081] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0082] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0083] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A brush head, characterized in that, include: The brushing section includes a first brushing section and a second brushing section, wherein the first brushing section is disposed on at least one side of the second brushing section along the width direction of the brush head. A brush plate is provided with hair-planting holes, and the brushing part is disposed in the hair-planting holes and extends outward from the hair-planting holes; In the orthographic projection of the first brushing section and the second brushing section along the length direction of the brush plate, the first brushing section forms a first projection and the second brushing section forms a second projection. The first projection and the second projection are spaced apart from each other in the width direction of the brush head; or, the first projection and the second projection partially overlap, and the maximum length of the overlapping portion of the first projection and the second projection along the width direction of the brush head is L1, and the length of the first projection as a whole along the width direction of the brush head is L2, where L1:L2≤0.

5. Wherein, the side of the first brushing part away from the hair implantation hole is a first end face, the first end face includes a first high part, the first high part is higher than other areas of the first end face; in the orthographic projection of the first brushing part and the second brushing part along the width direction of the brush plate, the first brushing part forms a third projection, the second brushing part adjacent to the first brushing part in the length direction forms a fourth projection, and the outline of the first high part in the third projection is higher than the outline formed by the side of the fourth projection away from the hair implantation hole.

2. The brush head according to claim 1, characterized in that, There is a gap between the first brushing part and the second brushing part, and the minimum width of the gap is greater than or equal to 0.5 mm and less than or equal to 1 mm.

3. The brush head according to claim 1, characterized in that, The first brushing section includes a connecting end and a free end connected to the brush plate, and the distance between the free end and the second brushing section is smaller than the distance between the connecting end and the second brushing section.

4. The brush head according to claim 3, characterized in that, The first brushing section is inclined from the connecting end toward the free end toward the direction close to the second brushing section.

5. The brush head according to claim 3, characterized in that, The orthographic projection of the free end of the first brushing part along the length direction of the brush plate is the first projection line; Wherein, the first projection line and the second projection are spaced apart from each other in the width direction of the brush head; or, the first projection line and the second projection partially overlap, and the length of the overlapping portion of the first projection line and the second projection along the width direction of the brush head is L3, and the length of the first projection line as a whole along the width direction of the brush head is L4, where L3:L4≤0.

5.

6. The brush head according to any one of claims 1-5, characterized in that, When the free end of the second brushing part moves along the length direction of the brush head, it forms a brushing path; the orthographic projection of the brushing path along the thickness direction of the brush head is the fifth projection, and the orthographic projection of the free end of the first brushing part along the thickness direction of the brush head is the sixth projection. Wherein, the fifth projection is spaced apart from the sixth projection; or, a portion of the sixth projection overlaps with the fifth projection, and the area of ​​the overlapping portion is S1, and the area of ​​the sixth projection is S2, where S1:S2≤0.

5.

7. The brush head according to any one of claims 1-5, characterized in that, The brush plate includes a main board and a side plate. The side plate is disposed on at least one side of the main board in the width direction. The first brushing part is disposed on the side plate, and the second brushing part is disposed on the main board. The side plate and the main board are flexibly connected so that the side plate can move relative to the main board.

8. The brush head according to claim 7, characterized in that, The motherboard has side plates on both sides along its width direction. The side plates on both sides are symmetrically arranged with respect to the central axis of the brush plate, and the side plates on both sides are provided with the first brushing part. The first brushing part on both sides is symmetrically arranged with respect to the central axis of the brush plate.

9. The brush head as described in claim 7, characterized in that, There is a first gap between the side plate and the main board, the width of the first gap being greater than or equal to 0.5 mm and less than or equal to 1 mm.

10. The brush head as described in claim 9, characterized in that, The brush plate also includes a connecting arm, and the side plate is connected to both sides of the main board via the connecting arm; Alternatively, an elastic filler is connected to the gap between the side plate and the main board.

11. The brush head as described in claim 1, characterized in that, The first high portion is higher than the regions on both sides of the first end face in the length direction; and / or, the first high portion is higher than the region on the side of the first end face away from the second brushing portion in the width direction.

12. The brush head as described in claim 1 or 11, characterized in that, The height of the first brushing section is lower than the height of the second brushing section that is adjacent to the first brushing section in the width direction.

13. The brush head as described in claim 1, characterized in that, The first end face has a first curved surface and a second curved surface formed on both sides along the length direction. The first curved surface is formed on the side of the first high part facing the brush bar and is in the shape of an outwardly convex arc. The second curved surface is formed on the side of the first high part facing away from the brush bar and is in the shape of an inwardly concave arc.

14. The brush head as described in claim 7, characterized in that, The brush head also includes a brush handle, which includes a cleaning section and an extension section for connecting to the handle of an electric toothbrush. The end of the main board away from the extension section is connected to the extension section via the cleaning section, and the end of the main board near the extension section is spaced apart from the brush handle along the thickness direction of the brush head, so that the main board can swing relative to the brush handle in the thickness direction of the brush head.

15. An electric toothbrush, characterized in that, It includes a brush handle and a brush head as described in any one of claims 1 to 14, the brush head being connected to the brush handle via the brush rod.

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