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 brush plate and a deformation piece. The brush plate comprises a first surface and a second surface which are opposite to each other, and a peripheral side surface connecting the first surface and the second surface, and the first surface of the brush plate is provided with first brush wires. The deformation piece comprises a buffering part and second brush wires, the second brush wires protrude and extend from the buffering part, the buffering part wraps at least part of the second face and at least part of the peripheral side face, the second brush wires and the first brush wires are located on the same side of the electric toothbrush head, and the second brush wires and the first brush wires are arranged at intervals. Due to the fact that the first brush wires are different from the second brush wires, under the condition that the brush handle drives the brush head to vibrate, the vibration mode and the vibration amplitude of the first brush wires are different from those of the second brush wires, and the first brush wires and the second brush wires can clean and polish the part to be cleaned respectively. The first brush wires and the second brush wires can nurse the to-be-cleaned part in different modes, and the electric toothbrush has a better nursing effect on the to-be-cleaned part.

Description

Technical Field

[0001] The present application relates to the field of cleaning technology, 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 driving element in the brush handle drives the electric toothbrush head to vibrate so as to use the brush wires on the electric toothbrush head to clean the surface and gaps of the part to be cleaned (such as teeth). The brush wires on the electric toothbrush heads of current electric toothbrushes are mostly made of the same material, and the cleaning effect is relatively simple, and the care effect on the part to be cleaned is not good. Utility Model Content

[0003] Embodiments of the present application provide an electric toothbrush head and an electric toothbrush.

[0004] The electric toothbrush head of the embodiment of the present application includes a brush plate and a deformable member. The brush plate includes a first surface and a second surface opposite to each other, and a peripheral side surface connecting the first surface and the second surface, and the first surface of the brush plate is provided with a first brush filament. The deformable member includes a buffer portion and a second brush filament, the second brush filament protrudes and extends from the buffer portion, the buffer portion covers at least a portion of the second surface and at least a portion of the peripheral side surface, the second brush filament and the first brush filament are located on the same side of the electric toothbrush head, and the second brush filament is spaced from the first brush filament.

[0005] Since the first brush filaments are different from the second brush filaments, when the driving member in the brush handle of the electric toothbrush head drives the brush head to vibrate, the vibration mode and vibration amplitude of the first brush filaments are different from those of the second brush filaments. Therefore, the first brush filaments and the second brush filaments can respectively clean and polish the part to be cleaned (such as teeth), and the first brush filaments and the second brush filaments can care for the part to be cleaned in different ways, and the electric toothbrush has a better care effect on the part to be cleaned.

[0006] In some embodiments, the deformable member is an integrated soft rubber member formed integrally with the buffer portion and the second brush filament.

[0007] The integrally formed buffer portion and the second brush filament have high strength at the junction, and the second brush filament is not easy to fall off from the buffer portion. In addition, there is no connection gap between the integrally formed buffer portion and the second brush filament, so when the electric toothbrush head is used to clean the oral cavity, liquid or foam will not be deposited on the deformable part, and the electric toothbrush head can be kept clean.

[0008] In some embodiments, the buffer portion is made of the same material as the second brush filaments, and the first brush filaments are made of different materials than the second brush filaments; and / or the hardness of the first brush filaments is greater than that of the second brush filaments, and under the same force, the deformation of the second brush filaments is greater than that of the first brush filaments; and / or the friction between the first brush filaments and the portion to be cleaned is less than the friction between the second brush filaments and the portion to be cleaned.

[0009] The first brush filament and the second brush filament are made of different materials, so the functions that the first brush filament and the second brush filament can achieve are also different. When the hardness of the first brush filament is greater than that of the second brush filament, the first brush filament can be used to clean hard parts to be cleaned (such as teeth), and the second brush filament can clean both hard parts to be cleaned and flexible parts to be cleaned (such as gums or the inner wall of the oral cavity, etc.), avoiding damage to the flexible parts to be cleaned. Since the friction between the first brush filament and the part to be cleaned is small, the first brush filament will not excessively scratch the surface to be cleaned of the part to be cleaned, avoiding damage to the surface to be cleaned of the part to be cleaned. The hardness of the second brush filament is small and the friction between it and the part to be cleaned is large, so the second brush filament can fully rub against the surface to be cleaned of the part to be cleaned to polish the surface to be cleaned of the part to be cleaned to care for the part to be cleaned.

[0010] In some embodiments, the first brush filaments include a plurality of filaments, the second brush filaments include a plurality of filaments, at least one of the first brush filaments has a circular or diamond-shaped cross-section taken by any plane perpendicular to the thickness direction of the brush plate, and / or at least one of the second brush filaments has a strip-shaped cross-section taken by any plane perpendicular to the thickness direction of the brush plate.

[0011] Along the width direction of the electric toothbrush head, when the width of the first brush filament is similar to that of the second brush filament, the second brush filament with a strip-shaped cross-section has a larger contact area with the part to be cleaned. Therefore, compared with the second brush filament set to be circular, the second brush filament with a strip shape can more fully rub against the part to be cleaned to polish the surface to be cleaned of the part to be cleaned.

[0012] In some embodiments, the extension direction of the strip is inclined relative to the length direction of the brush plate.

[0013] When the electric toothbrush head contacts the part to be cleaned and moves relative to the part to be cleaned, the first brush wire and the second brush wire will be partially deformed so that the deformed part contacts the part to be cleaned. Compared with the second brush wire parallel to the length direction of the electric toothbrush head, the inclined second brush wire can increase the friction area between the second brush wire and the part to be cleaned during the movement of the electric toothbrush head, so as to enhance the friction effect between the second brush wire and the surface to be cleaned of the part to be cleaned, and the cleaning and polishing effect of the part to be cleaned is better.

[0014] In some embodiments, the first brush filaments include multiple groups, each group of the first brush filaments includes multiple first brush filaments, the second brush filaments include multiple second brush filaments, at least one of the second brush filaments is taller than the other second brush filaments, and taller than at least one of the first brush filaments in at least one group, and the other second brush filaments are arranged around at least one second brush filament that is taller than the other second brush filaments; at least two groups of the first brush filaments are arranged around multiple second brush filaments.

[0015] When the electric toothbrush head contacts the part to be cleaned, the second brush wire located in the middle will first contact the part to be cleaned and deform and bend, and then the other shorter first brush wires and second brush wires will contact the part to be cleaned. When the first brush wire and the second brush wire both contact the surface to be cleaned of the part to be cleaned and deform and bend, compared with the other second brush wires, the higher second brush wire has a larger contact area with the part to be cleaned, and the friction area generated between the two is also larger, so the second brush bristles will have a better polishing effect on the part to be cleaned.

[0016] In some embodiments, in the same group of the first brush filaments, at least one of the first brush filaments is taller than the other first brush filaments.

[0017] The first brush filaments can be used to clean the part to be cleaned. When each first brush filament in the same group of first brush filaments contacts the surface to be cleaned of the part to be cleaned and is deformed and bent, compared with other first brush filaments, the higher first brush filaments have a larger contact area with the part to be cleaned, and the friction area generated therebetween is also larger. Therefore, the first brush filaments have a better cleaning effect on the part to be cleaned.

[0018] In some embodiments, the second brush filaments include a plurality of filaments, and the top surface of at least one of the second brush filaments is inclined relative to the length direction of the electric toothbrush head; and / or the top surface of at least one of the second brush filaments is inclined relative to the thickness direction of the electric toothbrush head; and / or the extension direction of at least one of the second brush filaments is inclined relative to the thickness direction of the electric toothbrush head; and / or the first brush filaments include a plurality of groups, and the extension direction of at least one group of the first brush filaments is inclined relative to the thickness direction of the electric toothbrush head.

[0019] Since the surface to be cleaned of the part to be cleaned usually has a curved surface, when the top surfaces of at least one group of first brush filaments and / or second brush filaments are inclined relative to the thickness direction of the electric toothbrush head, the top surfaces of the first brush filaments and the top surfaces of the second brush filaments can jointly form a curved surface that cooperates with the surface to be cleaned of the part to be cleaned, so that the top surfaces of all brush filaments can fit with the surface to be cleaned of the part to be cleaned, and the cleaning effect is better.

[0020] In some embodiments, the first brush filaments include multiple groups, and the multiple groups of the first brush filaments are arranged in sequence in the length direction of the electric toothbrush head; in the width direction of the electric toothbrush head, one side of the second brush filaments is close to the side edge of the brush plate, and at least two groups of the first brush filaments are arranged around the other sides of the second brush filaments.

[0021] When one side of the second brush wire is close to the side edge of the brush plate, the second brush wire is farther away from the center of the brush plate than the first brush wire, and the first brush wire is arranged closer to the center of the brush plate. At this time, the first brush wire arranged at the center can rub and clean the side of the cleaning part facing the electric toothbrush head, while the second brush wire arranged at the edge can polish the side of the cleaning part not facing the electric toothbrush head with its side surface and top surface.

[0022] In some embodiments, in the length direction of the electric toothbrush head, the width of the brush plate first increases and then decreases; the second brush filaments are arranged at the position where the width of the brush plate is the largest.

[0023] When the electric toothbrush head is facing the front side of the hard part to be cleaned (for example, the side of the teeth facing outward), the first brush wire can contact and clean the front side of the hard part to be cleaned. Since the second brush wire is located at the position where the brush plate is widest, the second brush wire can contact the position where other flexible parts to be cleaned (such as the gums or the inner wall of the mouth, etc.) are connected. Compared with the first brush wire, the second brush wire is softer, the second brush wire located at the widest part of the brush plate will not cause damage to the flexible part to be cleaned.

[0024] In some embodiments, the first brush filaments include at least two groups, and the second brush filaments are disposed between two adjacent groups of the first brush filaments to separate the two adjacent groups of the first brush filaments.

[0025] Compared with the scheme of arranging the same type of brush filaments in a cluster, the at least two groups of first brush filaments separated from each other can be evenly distributed on the brush plate, so that the cleaning effect of the electric toothbrush head is better. In addition, when the at least two groups of first brush filaments are separated, the second brush filaments can also be arranged closer to the middle of the brush plate along the length direction of the electric toothbrush head.

[0026] In some embodiments, two groups of the first brush filaments are arranged in sequence and spaced from each other in the length direction of the electric toothbrush head, and at least one group of the second brush filaments is arranged between two adjacent groups of the first brush filaments to separate the two groups of the first brush filaments in the length direction of the electric toothbrush head; and / or, two groups of the first brush filaments are arranged in sequence and spaced from each other in the width direction of the electric toothbrush head, and at least one group of the second brush filaments is arranged between two adjacent groups of the first brush filaments to separate the two groups of the first brush filaments in the width direction of the electric toothbrush head.

[0027] Multiple groups of first brush filaments can be arranged in sequence in the length direction and / or width direction of the electric toothbrush head and separated into different groups by the second brush filaments. Different groups of first brush filaments can clean the parts to be cleaned at different positions respectively, and the second brush filaments arranged between different groups of first brush filaments can also be arranged in sequence in the length direction and / or width direction of the electric toothbrush head and polish the part to be cleaned after the first brush filaments finish cleaning. The cleaning effect of the electric toothbrush head is better.

[0028] In some embodiments, the first brush filaments include a first group, a second group, a third group, and a fourth group spaced apart from each other, the first group and the second group are arranged in sequence in the length direction of the electric toothbrush head, and the third group and the fourth group are arranged in the width direction of the electric toothbrush head. The second brush filaments include a first strip, a second strip, a third strip, a fourth strip, and a fifth strip spaced apart from each other, the first strip is arranged between the first group and the third group, the second strip is arranged between the first group and the fourth group, the third strip is arranged between the second group and the third group, the fourth strip is arranged between the second group and the fourth group, and the fifth strip is arranged between the third group and the fourth group.

[0029] Each second brush wire can separate at least two groups of adjacent first brush wires, and a plurality of second brush wires can be arranged in the middle of the brush plate, and the remaining first brush wires are arranged around the second brush wires. Compared with the solution in which the second brush wires are arranged at the edge of the brush plate, the plurality of second brush wires located in the middle of the brush plate can better separate the first brush wires, so that the first brush wires are evenly distributed on the surface of the brush plate, so that the first brush wires at various locations can be used to clean the surface to be cleaned of the cleaning portion.

[0030] In some embodiments, the brush plate is provided with a through hole, the buffer portion and the second brush filament are integrally formed, and the second brush filament passes through the through hole and extends out from the first surface of the brush plate.

[0031] The through hole can allow the second brush filament to pass through. When the second brush filament and the buffer part are integrally formed, the second brush filament can extend from the second surface of the brush plate through the through hole to the first surface of the brush plate, so that the buffer part and the second surface of the brush plate are closely fitted, and the second brush filament can be arranged on the side where the first surface of the brush plate is located. When the second brush filament and the buffer part are separately formed, the buffer part is first formed on the second surface of the brush plate and the peripheral side surface of the brush plate. During the formation of the second brush filament, the soft rubber material in a fluid state can flow from the first surface of the brush plate into the through hole so that the second brush filament contacts the buffer part in the through hole and is injection molded.

[0032] In some embodiments, the brush plate is provided with a notch, and the second brush filaments are arranged in the notch and extend in a direction away from the buffer portion.

[0033] The notch allows the second brush filament to extend out. The notch can be set at the edge of the brush plate or in the middle of the brush plate. The second brush filament can extend from the second surface of the brush plate to the first surface of the brush plate and extend to the side where the first surface of the brush plate is located through the notch, or enter the notch from the opening formed by the notch and the side where the peripheral side of the brush plate is located, so that the second brush filament is installed at a designated position.

[0034] In some embodiments, the brush plate includes a plurality of hair-implanted portions, a first surface of each of the hair-implanted portions is provided with the first brush filaments, and the plurality of hair-implanted portions are spaced apart from each other to form the gap.

[0035] When the second brush filaments are integrally formed with the buffer portion and formed on the brush plate, the buffer portion can wrap at least a portion of the second surface of the implanted hair portion opposite to the first surface and the peripheral side surface respectively connected to the first surface and the second surface. The second brush filaments formed on the buffer portion can extend from the notch, and the second brush filaments will not contact the multiple implanted hair portions spaced apart from each other, so that the first brush filaments and the second brush filaments will not interfere with each other when no external force is applied.

[0036] In some embodiments, in the thickness direction of the electric toothbrush head, the thickness of the buffer portion at a location corresponding to the notch is greater than the thickness of the buffer portion at a location corresponding to the first brush filament.

[0037] When the buffer part covers the second surface and at least part of the peripheral side surface of the brush plate, the buffer part can be filled in the notch so that the height of the buffer part at the notch is the same as the height of the buffer part and the peripheral side surface of the hair-planting part. Along the width direction of the electric toothbrush head, when the outer contour edge of the deformable part is smooth, the thickness between the outer contour of the deformable part and the second surface of the brush plate will be smaller than the thickness between the outer contour of the deformable part and the first side of the deformable part at the notch. Therefore, when the brush plate vibrates, the thicker part of the deformable part can more effectively buffer the vibration.

[0038] In some embodiments, in the thickness direction of the electric toothbrush head, the buffer portion includes a first side and a second side opposite to each other, the first side of the buffer portion faces the first surface of the brush plate, and the second brush filaments are arranged on the first side of the buffer portion; in the thickness direction of the electric toothbrush head, the first side of the buffer portion is lower than the first surface of the brush plate.

[0039] The deformable part can be formed on the surface of the brush plate by hot-melting the soft rubber material and then solidifying it. When the first surface of the brush plate is protruding compared to the first side of the buffer part, the soft rubber material in a fluid state will not enter the hole for installing the first brush wire provided on the first surface of the brush plate, thereby avoiding difficulty in installing the bristles.

[0040] 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, and the electric toothbrush head is installed on the brush handle.

[0041] Since the first brush filaments and the second brush filaments are made of different materials, when the brush handle drives the brush head to vibrate, the vibration mode and vibration amplitude of the first brush filaments are different from those of the second brush filaments. Therefore, the first brush filaments and the second brush filaments can respectively clean and polish the part to be cleaned, and the first brush filaments and the second brush filaments can care for the part to be cleaned in different ways, and the electric toothbrush has a better care effect on the part to be cleaned.

[0042] 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

[0043] 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:

[0044] Figure 1 is a three-dimensional schematic diagram of an electric toothbrush head according to certain embodiments of the present application;

[0045] Figure 2 yes Figure 1 A three-dimensional schematic diagram of a partial structure of an electric toothbrush head shown;

[0046] Figure 3 is an exploded schematic diagram of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0047] Figure 4 is a schematic plan view of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0048] Figure 5 is a schematic plan view of a partial structure of an electric toothbrush head according to some embodiments of the present application;

[0049] Figure 6 It is a three-dimensional schematic diagram of an electric toothbrush according to certain embodiments of the present application.

[0050] Description of main component symbols:

[0051] 1000, electric toothbrush; 100, electric toothbrush head; 300, brush handle; 10, brush body; 30, rod body; D, width of brush plate; X, length direction; Y, width direction; Z, thickness direction; 1101, bristles; 11, brush plate; 101, first side; 102, second side; 103, through hole; 104, notch; 105, peripheral side; 111, first brush filament; 1111, first group; 1112, second group; 1113, third group; 1114, fourth group; 113, hair implantation; 13, deformation member; 131, buffer part; 1311, first side of buffer part; 1313, second side of buffer part; 133, second brush filament; 1331, first strip; 1332, second strip; 1333, third strip; 1334, fourth strip; 1335, fifth strip. DETAILED DESCRIPTION

[0052] 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.

[0053] In the description of the present application, it should be understood that the terms "thickness", "upper", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0054] 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.

[0055] See also Figures 1 to 3The electric toothbrush head 100 of the present application includes a brush plate 11 and a deformable member 13. The brush plate 11 includes a first surface 101 and a second surface 102 opposite to each other, and a peripheral side surface 105 connecting the first surface 101 and the second surface 102. The first surface 101 of the brush plate 11 is provided with a first brush filament 111. The deformable member 13 includes a buffer portion 131 and a second brush filament 133. The second brush filament 133 protrudes and extends from the buffer portion 131. The buffer portion 131 covers at least a portion of the second surface 102 and at least a portion of the peripheral side surface 105. The second brush filament 133 and the first brush filament 111 are located on the same side of the electric toothbrush head 100, and the second brush filament 133 is spaced apart from the first brush filament 111.

[0056] Among them, the first brush filament 111 and the second brush filament 133 are both bristles 1101 that can be arranged on the electric toothbrush head 100, and the bristles 1101 are structures for cleaning and / or caring for the teeth, gums or the inner wall of the oral cavity waiting to be cleaned. Each bristle 1101 may include multiple brush filaments. The material of the bristles 1101 includes but is not limited to nylon, polyamide or silicone. In the case where the material of the bristles 1101 is a hard material such as nylon or polyamide (i.e., the first brush filament 111), the free end of the bristles 1101 can contact the surface of the teeth to be cleaned and clean the teeth and the gaps between the teeth. In the case where the material of the bristles 1101 is a flexible material such as silicone (i.e., the second brush filament 133), the free end of the bristles 1101 can contact the tooth surface to perform a polishing-like care on the tooth surface, and the free end of the bristles 1101 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.

[0057] In the electric toothbrush head 100 of the present application, since the first brush wire 111 and the second brush wire 133 are different, the brush handle 300 ( Figure 6 When the driving member (not shown) drives the electric toothbrush head 100 to vibrate, the vibration mode and vibration amplitude of the first brush filament 111 are different from the vibration mode and vibration amplitude of the second brush filament 133, so the first brush filament 111 and the second brush filament 133 can clean and polish the part to be cleaned, respectively, and the first brush filament 111 and the second brush filament 133 can care for the part to be cleaned in different ways, and the electric toothbrush 1000 has a better care effect on the part to be cleaned.

[0058] The electric toothbrush head 100 is further described below with reference to the accompanying drawings.

[0059] See also Figure 1 and Figure 2In some embodiments, the electric toothbrush head 100 includes a brush body 10 and a rod body 30 connected to each other. The brush plate 11 and the deformable member 13 are both partial structures of the brush body 10. The rod body 30 is roughly a cylindrical structure, and the shape of the cross section of the rod body 30 includes but is not limited to a perfect circle, an ellipse or a polygon. The rod body 30 is connected to the brush body 10. In some embodiments, the rod body 30 and the brush body 10 are integrally formed. The materials of the rod body 30 and the brush body 10 can be the same or different, which is not limited here. In other embodiments, the rod body 30 and the brush body 10 are separately formed, and the rod body 30 and the brush body 10 can be connected by a non-detachable method such as gluing, hot melt connection or interference connection, or can be connected by a detachable method such as snap connection, threaded connection or bolt connection, which is not limited here. The length direction X of the electric toothbrush head 100 can be either the direction from the brush body 10 to the rod body 30 or the direction from the rod body 30 to the brush body 10. Along the length direction X of the electric toothbrush head 100, the brush body 10 includes a first end and a second end opposite to each other. The first end of the brush body 10 is away from the rod body 30, and the second end of the brush body 10 is close to the rod body 30. 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.

[0060] Furthermore, in some embodiments, the brush plate 11 is a structure that can be connected to the first brush filaments 111 and support and connect the first brush filaments 111. The brush plate 11 is generally a plate-shaped structure. In some embodiments, the brush plate 11 is an integral structure. The brush plate 11 is provided with at least one recess and / or gap so that the brush plate 11 can be deformed when subjected to force. When the brush plate 11 is deformed, the buffer portion 131 will also be deformed relatively. At this time, the first brush filaments 111 provided on the brush plate 11 and the second brush filaments 133 provided on the buffer portion 131 can both fit the surface to be cleaned of the part to be cleaned. In other embodiments, the brush plate 11 is an integral structure formed by connecting multiple parts together, such as Figure 5 As shown, the brush plate 11 includes three implanted hair portions 113, each of which is provided with a first brush filament 111, and gaps are provided between different implanted hair portions 113. When the brush plate 11 is subjected to force, the spacing between each implanted hair portion 113 will change under the action of external force, so that the brush plate 11 is deformed.

[0061] Specifically, please combine Figure 3In some embodiments, the first surface 101 of the brush plate 11 and the second surface 102 of the brush plate 11 are arranged opposite to each other in the thickness direction Z of the electric toothbrush head 100, that is, the thickness direction Z of the electric toothbrush head 100 can be the direction from the first surface 101 of the brush plate 11 to the second surface 102 of the brush plate 11, or the direction from the second surface 102 of the brush plate 11 to the first surface 101 of the brush plate 11, which is not limited here. In some embodiments, the brush plate 11 includes a first end and a second end in the length direction X, the first end of the brush plate 11 is a free end, and the second end of the brush plate 11 can be directly or indirectly connected to the rod body 30. In other embodiments, the rod body 30 is directly or indirectly connected to the second surface 103 of the brush plate 11, such as Figure 3 shown.

[0062] More specifically, please combine Figure 4 In some embodiments, the brush plate 11 is provided with a through hole 103, which is a structure for installing the second brush filament 133 or for the second brush filament 133 to pass through. The through hole 103 penetrates the first surface 101 and the second surface 102 of the brush plate 11 along the thickness direction Z of the electric toothbrush head 100. When the second brush filament 133 and the buffer portion 131 are integrally formed, in some embodiments, the second brush filament 133 can pass through the through hole 103 from the second surface 102 of the brush plate 11 and extend from the first surface 101 of the brush plate 11, so that the buffer portion 131 is closely fitted with the second surface 102 of the brush plate 11, and the second brush filament 133 can protrude and extend from the side where the first surface 101 of the brush plate 11 is located. In other embodiments, during the formation of the second brush filaments 133, the soft rubber material in a fluid state can flow from the first surface 101 of the brush plate 11 into the through hole 103 to form the second brush filaments 133 in the through hole 103, and the soft rubber material flowing out of the through hole 103 can be injection molded on the second surface 102 of the brush plate 11 and the peripheral side surface 105 of the brush plate 11 to form the buffer portion 131. In the case where the second brush filaments 133 and the buffer portion 131 are separately molded, the buffer portion 131 is first formed on the second surface 102 of the brush plate 11 and the peripheral side surface 105 of the brush plate 11, and the second brush filaments 133 can be installed on the surfaces corresponding to the buffer portion 131 and the through hole 103 through the through hole 103.

[0063] More specifically, please combine Figure 2In some embodiments, the brush plate 11 is provided with a notch 104, and the second brush filament 133 is provided in the notch 104 and extends in a direction away from the buffer portion 131. The notch 104 allows the second brush filament 133 to extend out. The notch 104 can be provided at the edge of the brush plate 11 or in the middle of the brush plate 11. The second brush filament 133 can extend from the second surface 102 of the brush plate 11 to the first surface 101 of the brush plate 11 and extend out of the side where the first surface 101 of the brush plate 11 is located through the notch 104, or can enter the notch 104 from the opening formed by the notch 104 and the side where the peripheral side surface 105 of the brush plate 11 is located, so that the second brush filament 133 is installed at a designated position. In the case where the second brush filament 133 and the buffer portion 131 are integrally formed and directly formed on the brush plate 11, the buffer portion 131 can wrap at least part of the first surface 101, the second surface 102 and the peripheral side surface 105 of the brush plate 11. The second brush filaments 133 formed on the buffer portion 131 can extend from the notch 104, and the second brush filaments 133 will not contact the multiple mutually spaced hair implantation portions 113, so that the first brush filaments 111 and the second brush filaments 133 will not interfere with each other when no external force is applied. Figure 2 and Figure 3 , the notch 104 is a side opening or a through hole formed on the brush plate 11 of the integral structure. In other embodiments, the brush plate includes a plurality of bristle-planted portions, each of which has a first brush filament on its first surface, and the notch may be formed by a plurality of bristle-planted portions spaced apart from each other. In one example, at least one bristle-planted portion forms a notch in the middle of the brush plate, and the edge of the notch does not connect to the edge of the brush plate. In another example, at least one bristle-planted portion forms a notch on any edge of the brush plate, and the edge of the notch connects to the edge of the brush plate.

[0064] Also specifically, in certain embodiments, see Figure 5, the implanted hair part 113 is a structure that can be connected to the first bristle 111, and the adjacent implanted hair parts 113 are connected to each other through a deformable structure. One end of the first bristle 111 extends into the implanted hair part 113 and is installed on the implanted hair part 113, and the other end of the first bristle 111 is a free end. The extension direction of the first bristle 111 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 implanted hair parts 113, and the connecting part is located in the gap and is a structure that can connect at least two mutually spaced implanted hair parts 113. The connecting part is roughly a plate-like structure with a small thickness and easy to bend and deform under force. When the user uses the electric toothbrush head 100, the user will apply external force to the first bristle 111. At this time, the first bristle 111 will be compressed and bent on the one hand, and on the other hand, it will also transmit the external force to the implanted hair part 113 connected to the first bristle 111. Since adjacent hair-planting portions 113 are connected to each other only by a deformable structure, when the hair-planting portions 113 are subjected to force, the deformable structure will bend and deform along the thickness direction Z of the electric toothbrush head 100 under the action of the external force. At this time, the size of the gap between adjacent hair-planting portions 113 will change, causing the brush body 10 to deform.

[0065] See also Figure 2 and Figure 3 In some embodiments, the deformable member 13 is a force-variable structure made of a flexible material such as soft glue. For example, the deformable member 13 is an integrated soft glue member in which the buffer portion 131 and the second brush filament 133 are integrally formed. The deformable member 13 can be used to protect and support the brush plate 11 on the one hand, and on the other hand, it can also participate in the formation of the second brush filament 133 for caring for and cleaning the part to be cleaned (such as teeth). The strength of the junction between the integrally formed buffer portion 131 and the second brush filament 133 is relatively high, and the second brush filament 133 is not easy to fall off the buffer portion 131. And there will be no connection gap between the integrally formed buffer portion 131 and the second brush filament 133, so liquid or foam will not be deposited in the deformable member 13 during use, and the electric toothbrush head 100 can remain clean.

[0066] Further, in some embodiments, the buffer portion 131 and the second brush filament 133 are made of the same material, and the first brush filament 111 and the second brush filament 133 are made of different materials. The first brush filament 111 and the second brush filament 133 are made of different materials, so the functions that the first brush filament 111 and the second brush filament 133 can achieve are also different. In one example, the first brush filament 111 is made of a hard nylon material, and the buffer portion 131 and the second brush filament 133 are made of a soft silicone material. Compared with the materials of the buffer portion 131 and the second brush filament 133, the material strength of the first brush filament 111 is greater, so it can provide stronger support for the part to be cleaned when subjected to force, so the first brush filament 111 can be used to clean the more stubborn dirt on the surface of the part to be cleaned. The second brush filament 133 can perform secondary cleaning and friction polishing on the relatively clean surface of the part to be cleaned after the first brush filament 111 finishes cleaning, so as to achieve a better cleaning effect on the surface of the part to be cleaned.

[0067] Furthermore, in some embodiments, the hardness of the first brush filament 111 is greater than that of the second brush filament 133, and under the same force, the deformation of the second brush filament 133 is greater than that of the first brush filament 111. When the hardness of the first brush filament 111 is greater than that of the second brush filament 133, the first brush filament 111 can be used to clean hard parts to be cleaned (such as teeth), and the second brush filament 133 can clean both hard parts to be cleaned and flexible parts to be cleaned (such as gums or the inner wall of the oral cavity), avoiding damage to the flexible parts to be cleaned.

[0068] Furthermore, in some embodiments, the friction between the first brush filament 111 and the portion to be cleaned is less than the friction between the second brush filament 133 and the portion to be cleaned. Among them, the second brush filament 133 can be provided with a pattern on the surface to increase the friction, or it can be made of a material with a large friction coefficient, which is not limited here. Since the friction between the first brush filament 111 and the portion to be cleaned is small, the first brush filament 111 will not excessively scratch the surface to be cleaned of the portion to be cleaned, thereby avoiding damage to the surface to be cleaned of the portion to be cleaned. The friction between the second brush filament 133 and the portion to be cleaned is large, so the second brush filament 133 can fully rub against the surface to be cleaned of the portion to be cleaned to polish the surface to be cleaned of the portion to be cleaned to care for the portion to be cleaned.

[0069] See also Figure 2 and Figure 3In some embodiments, in the thickness direction Z of the electric toothbrush head 100, the thickness of the buffer portion 131 at the portion corresponding to the notch 104 is greater than the thickness of the buffer portion 131 at the portion corresponding to the first brush filament 111. When the buffer portion 131 covers the second surface 102 of the brush plate 11 and at least a portion of the peripheral side surface 105 of the brush plate 11, the buffer portion 131 can be filled in the notch 104, so that in the thickness direction Z of the electric toothbrush head 100, the height of the buffer portion 131 at the notch 104 is the same as the height of the buffer portion 131 at the peripheral side surface 105 of the hair-planting portion 113. Along the width direction Y of the electric toothbrush head 100, when the outer contour edge of the deformable member 13 is smooth, the thickness between the outer contour of the deformable member 13 and the second surface 102 of the brush plate 11 will be smaller than the thickness between the outer contour of the deformable member 13 and the first side of the deformable member 13 at the notch 104. Therefore, when the brush plate 11 vibrates, the thicker part of the deformable member 13 can more effectively buffer the vibration, thereby avoiding excessive vibration amplitude at the second brush wire 133, which would cause excessive friction of the surface to be cleaned.

[0070] Further, in some embodiments, in the thickness direction Z of the electric toothbrush head 100, the buffer portion 131 includes a first side 1311 and a second side 1313 opposite to each other, the first side 1311 of the buffer portion 131 is on the same side as the first surface 101 of the brush plate 11, and the second side 1313 of the buffer portion 131 is on the same side as the second surface 103 of the brush plate 11. The second brush filaments 133 are arranged on the first side 1311 of the buffer portion 131. In the thickness direction Z of the electric toothbrush head 100, the first side 1311 of the buffer portion 131 is lower than the first surface 101 of the brush plate 11. The deformable member 13 can be formed on the surface of the brush plate 11 by hot-melting the soft rubber material and then solidifying it again. When the first surface 101 of the brush plate 11 protrudes compared to the first side 1311 of the buffer portion 131, the soft rubber material in a fluid state will not enter the implantation holes for installing the first brush filaments 111 arranged on the first surface 101 of the brush plate 11, thereby avoiding the difficulty in installing the first brush filaments 111.

[0071] See also Figure 2 and Figure 5In some embodiments, the first brush filaments 111 include a plurality of filaments, and the second brush filaments 133 include a plurality of filaments, and the cross-section of each first brush filament 111 (the cross-section cut by the XY plane) is approximately circular, and the cross-section of each second brush filament 133 (the cross-section cut by the XY plane) is approximately strip-shaped. The plurality of first brush filaments 111 and the plurality of second brush filaments 133 together form a brush surface for cleaning the portion to be cleaned. The plurality of first brush filaments 111 and the plurality of second brush filaments 133 are spaced from each other, and will not cause interference between the brush filaments to affect use. At least one of the first brush filaments 111 has a circular or diamond-shaped cross-section cut by any plane (XY plane) perpendicular to the thickness direction Z of the brush plate 11, and / or at least one of the second brush filaments 133 has a strip-shaped cross-section cut by any plane (XY plane) perpendicular to the thickness direction Z of the brush plate 11. Along the width direction Y of the electric toothbrush head 100, when the width of the first brush filament 111 is similar to the width of the second brush filament 133, the second brush filament 133 with a strip-shaped cross-section has a larger contact area with the part to be cleaned. Therefore, compared with the second brush filament 133 set to be circular, the second brush filament 133 with a strip shape can more fully rub against the part to be cleaned to polish the surface to be cleaned of the part to be cleaned.

[0072] Further, in some embodiments, the strip-shaped extension direction of at least one second brush filament 133 is parallel to the length direction X of the brush plate 11 and / or the width D direction of the brush plate 11. In other embodiments, the strip-shaped extension direction of at least one second brush filament 133 is inclined relative to the length direction X of the brush plate 11 and / or the width D direction of the brush plate 11. When the electric toothbrush head 100 is in contact with the portion to be cleaned and moves relative to the portion to be cleaned, both the first brush filament 111 and the second brush filament 133 will be partially deformed so that the deformed portion is in contact with the portion to be cleaned. Compared with the second brush filament 133 parallel to the length direction X of the electric toothbrush head 100, the inclined second brush filament 133 can increase the friction area between the second brush filament 133 and the portion to be cleaned during the movement of the electric toothbrush head 100, so as to enhance the friction effect between the second brush filament 133 and the surface to be cleaned of the portion to be cleaned, and the cleaning and polishing effect of the portion to be cleaned is better.

[0073] Furthermore, in some embodiments, the first brush filaments 111 include multiple groups, each group of first brush filaments 111 includes multiple first brush filaments 111, each group of first brush filaments 111 is separated from each other and has a gap, the multiple first brush filaments 111 in each group of first brush filaments 111 are separated from each other and have a gap, and the multiple first brush filaments 111 in the same group of first brush filaments 111 can be distributed in different positions according to the shape of the brush plate 11 or the bristle implantation portion 113, so that the outer contour shape of each group of first brush filaments 111 in any cross section (XY plane) perpendicular to the thickness direction Z of the electric toothbrush head 100 can be different. The second brush filaments 133 include multiple filaments, each second brush filament 133 is separated from each other and has a gap, and in some embodiments, at least one second brush filament 133 is higher than other second brush filaments 133 and higher than at least one of the at least one group of first brush filaments 111, and the other second brush filaments 133 are arranged around at least one second brush filament 133 that is higher than other second brush filaments 133. When the electric toothbrush head 100 contacts the part to be cleaned, the second brush wire 133 located in the middle will first contact the part to be cleaned and deform and bend, and then the other shorter first brush wires 111 and second brush wires 133 can contact the part to be cleaned. When the first brush wire 111 and the second brush wire 133 are both in contact with the surface to be cleaned of the part to be cleaned and deform and bend, compared with the other second brush wires 133, the higher second brush wire 133 has a larger contact area with the part to be cleaned, and the friction area generated between the two is also larger, so the second brush wire 133 has a better polishing effect on the part to be cleaned. At least two groups of first brush wires 111 are arranged around multiple second brush wires 133, so that the second brush wires 133 are arranged closer to the middle of the brush plate 11 relative to the first brush wires 111.

[0074] Furthermore, in some embodiments, in the same group of first brush filaments 111, at least one first brush filament 111 is taller than the other first brush filaments 111. The first brush filaments 111 can be used to clean the portion to be cleaned, and when each first brush filament 111 in the same group of first brush filaments 111 contacts the surface to be cleaned of the portion to be cleaned and deforms and bends, compared with other first brush filaments 111, the taller first brush filament 111 has a larger contact area with the portion to be cleaned, and a larger friction area is generated therebetween, so the first brush filament 111 has a better cleaning effect on the portion to be cleaned.

[0075] See also Figure 2 and Figure 3In some embodiments, the top surface of at least one second brush filament 133 is inclined relative to the length direction X of the electric toothbrush head 100, and / or is inclined relative to the thickness direction Z of the electric toothbrush head 100, so that the top surface of the second brush filament 133 is relatively inclined. Since the top surface of the second brush filament 133 is the side that contacts the surface to be cleaned of the part to be cleaned, the top surface of the second brush filament 133 that is inclined relative to the length direction X of the electric toothbrush head 100 and / or the thickness direction Z of the electric toothbrush head 100 can have a larger contact area with the surface to be cleaned of the part to be cleaned, and the cleaning effect is better. In some embodiments, only the top surface of the second brush filament 133 is inclined relative to the thickness direction Z of the electric toothbrush head 100. In other embodiments, please combine Figure 2 The extension direction of at least one second brush filament 133 is inclined relative to the thickness direction Z of the electric toothbrush head 100 to form an overall inclined second brush filament 133. The overall inclined second brush filament 133 can contact the side of the part to be cleaned that is not directly opposite to the first surface 101 of the brush plate 11 to clean various surfaces of the part to be cleaned.

[0076] Furthermore, in some embodiments, in the length direction X of the electric toothbrush head 100, the width D of the brush plate 11 increases first and then decreases; the second brush filaments 133 are arranged at the position where the width D of the brush plate 11 is the largest. When the electric toothbrush head 100 is directly facing the front of the hard part to be cleaned (for example, the side of the teeth facing outward), the first brush filaments 111 can contact and clean the front of the hard part to be cleaned. Since the second brush filaments 133 are located at the position where the width of the brush plate 11 is the largest, the second brush filaments 133 can contact the position where other flexible parts to be cleaned (for example, gums or the inner wall of the oral cavity, etc.) are connected. Since the second brush filaments 133 are softer than the first brush filaments 111, the second brush filaments 133 arranged at the widest part of the brush plate 11 will not cause damage to the flexible part to be cleaned.

[0077] See also Figure 2 and Figure 3 In some embodiments, the extension direction of at least one group of first brush filaments 111 is inclined relative to the thickness direction Z of the electric toothbrush head 100. Since the surface to be cleaned of the portion to be cleaned usually has a curved surface, when the extension direction of at least one group of first brush filaments 111 and / or second brush filaments 133 is inclined relative to the thickness direction Z of the electric toothbrush head 100, on the one hand, the top surface of the first brush filaments 111 and the top surface of the second brush filaments 133 can jointly form a curved surface that matches the surface to be cleaned of the portion to be cleaned, so that the top surface of the brush filaments can fit the surface to be cleaned of the portion to be cleaned, and the cleaning effect is better. On the other hand, the first brush filaments 111 and the second brush filaments 133 that are tilted as a whole can contact the different side surfaces of the portion to be cleaned that are not directly opposite to the first surface 101 of the brush plate 11, so as to clean each surface of the portion to be cleaned.

[0078] See also Figure 2 and Figure 3 In some embodiments, a plurality of groups of first brush filaments 111 are arranged in sequence in the length direction X of the electric toothbrush head 100; in the width direction Y of the electric toothbrush head 100, one side of the second brush filaments 133 is close to the side edge of the brush plate 11, and at least two groups of first brush filaments 111 are arranged around the other sides of the second brush filaments 133. When one side of the second brush filaments 133 is close to the side edge of the brush plate 11, compared with the first brush filaments 111, the second brush filaments 133 are farther away from the center of the brush plate 11, and the first brush filaments 111 are arranged closer to the center of the brush plate 11. At this time, the first brush filaments 111 arranged at the center can rub and clean the side of the part to be cleaned facing the electric toothbrush head 100, while the second brush filaments 133 arranged at the edge can polish the side of the part to be cleaned that is not facing the electric toothbrush head 100 with its side and top surface.

[0079] Further, in some embodiments, the first brush filaments 111 include at least two groups, and the second brush filaments 133 are arranged between two adjacent groups of first brush filaments 111 to separate the two adjacent groups of first brush filaments 111. Compared with the scheme in which the same type of brush filaments are arranged in a cluster, the at least two groups of first brush filaments 111 separated from each other can be evenly distributed in various parts of the brush plate 11, so that the cleaning effect of the electric toothbrush head 100 is better. In addition, when the second brush filaments 133 separate the at least two groups of first brush filaments 111, they can also be arranged at a position closer to the middle of the brush plate 11 relative to the length direction X of the electric toothbrush head 100.

[0080] Furthermore, in some embodiments, two groups of first brush filaments 111 are arranged in sequence and spaced from each other in the length direction X of the electric toothbrush head 100, and at least one group of second brush filaments 133 is arranged between two adjacent groups of first brush filaments 111 to separate the two groups of first brush filaments 111 in the length direction X of the electric toothbrush head 100; and / or two groups of first brush filaments 111 are arranged in sequence and spaced from each other in the width direction Y of the electric toothbrush head 100, and at least one group of second brush filaments 133 is arranged between two adjacent groups of first brush filaments 111 to separate the two groups of first brush filaments 111 in the width direction Y of the electric toothbrush head 100. Multiple groups of first brush filaments 111 can be arranged in sequence in the length direction X and / or width direction Y of the electric toothbrush head 100 and separated into different groups by the second brush filaments 133. Different groups of first brush filaments 111 can clean the parts to be cleaned at different positions respectively, and the second brush filaments 133 arranged between different groups of first brush filaments 111 can also be arranged in sequence in the length direction X and / or width direction Y of the electric toothbrush head 100 and polish the part to be cleaned after the first brush filaments 111 have completed cleaning. The cleaning effect of the electric toothbrush head 100 is better.

[0081] Specifically, please combine Figure 5In some embodiments, the first bristle 111 includes a first group 1111, a second group 1112, a third group 1113 and a fourth group 1114 which are spaced apart from each other. The first group 1111 and the second group 1112 are arranged in sequence in the length direction X of the electric toothbrush head 100, and the third group 1113 and the fourth group 1114 are arranged in the width direction Y of the electric toothbrush head 100. The second brush 133 includes a first strip 1331, a second strip 1332, a third strip 1333, a fourth strip 1334 and a fifth strip 1335 which are spaced apart from each other. The first strip 1331 is disposed between the first group 1111 and the third group 1113 to separate the first group 1111 and the third group 1113, the second strip 1332 is disposed between the first group 1111 and the fourth group 1114 to separate the first group 1111 and the fourth group 1114, the third strip 1333 is disposed between the second group 1112 and the third group 1113 to separate the second group 1112 and the third group 1113, the fourth strip 1334 is disposed between the second group 1112 and the fourth group 1114 to separate the second group 1112 and the fourth group 1114, and the fifth strip 1335 is disposed between the third group 1113 and the fourth group 1114 to separate the third group 1113 and the fourth group 1114. No first brush filaments 111 are arranged between the first to fifth second brush filaments 1331 to 1335, and the first to fifth second brush filaments 1331 to 1335 are arranged between the first group 1111 and the second group 1112 to separate the first group 1111 from the second group 1112. In this embodiment, each second brush filament 133 can separate at least two adjacent groups of first brush filaments 111, and a plurality of second brush filaments 133 can be arranged in the middle of the brush plate 11, and the remaining first brush filaments 111 are arranged around the second brush filaments 133. Compared with the solution in which the second brush filaments 133 are arranged at the edge of the brush plate 11, the plurality of second brush filaments 133 located in the middle of the brush plate 11 can better separate the first brush filaments 111, so that the first brush filaments 111 are evenly distributed on the surface of the brush plate 11, so that the first brush filaments 111 at various locations can be used to clean the surface to be cleaned of the cleaning portion.

[0082] See also Figure 1 and Figure 6 The electric toothbrush 1000 of the present application includes the electric toothbrush head 100 and the brush handle 300 described in any of the above embodiments, and the electric toothbrush head 100 is installed on the brush handle 300.

[0083] In the electric toothbrush 1000 of the present application, the first brush filament 111 and the second brush filament 133 are made of different materials. When the brush handle 300 drives the brush head to vibrate, the vibration mode and vibration amplitude of the first brush filament 111 are different from those of the second brush filament 133. Therefore, the first brush filament 111 and the second brush filament 133 can clean and polish the part to be cleaned respectively. The first brush filament 111 and the second brush filament 133 can care for the part to be cleaned in different ways, and the electric toothbrush 1000 has a better care effect on the part to be cleaned.

[0084] 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.

[0085] 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: A brush plate, the brush plate comprising a first surface and a second surface opposite to each other, and a peripheral side surface connecting the first surface and the second surface, and the first surface of the brush plate is provided with a first brush filament; and A deformable member, wherein the deformable member includes a buffer portion and a second brush wire, the second brush wire protrudes and extends from the buffer portion, the buffer portion covers at least a portion of the second surface and at least a portion of the peripheral side surface, the second brush wire and the first brush wire are located on the same side of the electric toothbrush head, and the second brush wire is spaced apart from the first brush wire, the second brush wire is a soft rubber member, the first brush wire and the second brush wire are made of different materials, the hardness of the first brush wire is greater than the hardness of the second brush wire, and under the same force, the deformation of the second brush wire is greater than the deformation of the first brush wire.

2. The electric toothbrush head according to claim 1, characterized in that: The deformable member is an integrated soft rubber member formed by integrating the buffer portion and the second brush filament.

3. The electric toothbrush head according to claim 1, characterized in that: The buffer portion and the second brush filament are made of the same material; and / or, The friction force between the first brush filaments and the portion to be cleaned is smaller than the friction force between the second brush filaments and the portion to be cleaned.

4. The electric toothbrush head according to claim 1, characterized in that: The first brush filaments include a plurality of filaments, the second brush filaments include a plurality of filaments, and a cross section of at least one of the first brush filaments cut by any plane perpendicular to the thickness direction of the brush plate is circular or rhombus-shaped; and / or, At least one of the second brush filaments has a strip-shaped cross section cut by any plane perpendicular to the thickness direction of the brush plate.

5. The electric toothbrush head according to claim 4, characterized in that: The extending direction of the strip is inclined relative to the length direction of the brush plate.

6. The electric toothbrush head according to claim 1, characterized in that: The first brush filaments include a plurality of groups, each group of the first brush filaments includes a plurality of the first brush filaments, the second brush filaments include a plurality of the second brush filaments, at least one second brush filament is higher than the second brush filaments other than the at least one second brush filament and higher than at least one of the first brush filaments in at least one group, and the second brush filaments other than the at least one second brush filament are arranged around the at least one second brush filament; at least two groups of the first brush filaments are arranged around the plurality of the second brush filaments.

7. The electric toothbrush head according to claim 6, characterized in that: In the same group of the first brush filaments, at least one first brush filament is taller than the first brush filaments other than the at least one first brush filament.

8. The electric toothbrush head according to claim 1, characterized in that: The second brush filaments include a plurality of filaments, and the top surface of at least one of the second brush filaments is inclined relative to the length direction of the electric toothbrush head; and / or, the top surface of at least one of the second brush filaments is inclined relative to the thickness direction of the electric toothbrush head; and / or, the extension direction of at least one of the second brush filaments is inclined relative to the thickness direction of the electric toothbrush head; and / or, The first brush filaments include a plurality of groups, and an extending direction of at least one group of the first brush filaments is inclined relative to a thickness direction of the electric toothbrush head.

9. The electric toothbrush head according to claim 1, characterized in that: The first brush filaments include multiple groups, and the multiple groups of the first brush filaments are arranged in sequence in the length direction of the electric toothbrush head; in the width direction of the electric toothbrush head, one side of the second brush filaments is close to the side edge of the brush plate, and at least two groups of the first brush filaments are arranged around any side of the second brush filaments except the side close to the side edge of the brush plate.

10. The electric toothbrush head according to claim 1, characterized in that: In the length direction of the electric toothbrush head, the width of the brush plate increases first and then decreases; the second brush filaments are arranged at the position where the width of the brush plate is the largest.

11. The electric toothbrush head according to claim 1, characterized in that: The first brush filaments include at least two groups, and the second brush filaments are arranged between two adjacent groups of the first brush filaments to separate the two adjacent groups of the first brush filaments.

12. The electric toothbrush head according to claim 11, characterized in that: The two groups of the first brush wires are arranged in sequence and spaced apart from each other in the length direction of the electric toothbrush head, and at least one group of the second brush wires is arranged between two adjacent groups of the first brush wires to separate the two groups of the first brush wires in the length direction of the electric toothbrush head; and / or, The two groups of the first brush filaments are arranged in sequence and spaced apart from each other in the width direction of the electric toothbrush head, and at least one group of the second brush filaments is arranged between two adjacent groups of the first brush filaments to separate the two groups of the first brush filaments in the width direction of the electric toothbrush head.

13. The electric toothbrush head according to claim 12, characterized in that: The first brush filaments include a first group, a second group, a third group and a fourth group spaced apart from each other, the first group and the second group are arranged in sequence in the length direction of the electric toothbrush head, and the third group and the fourth group are arranged in the width direction of the electric toothbrush head; the second brush filaments include a first strip, a second strip, a third strip, a fourth strip and a fifth strip spaced apart from each other, the first strip is arranged between the first group and the third group, the second strip is arranged between the first group and the fourth group, the third strip is arranged between the second group and the third group, the fourth strip is arranged between the second group and the fourth group, and the fifth strip is arranged between the third group and the fourth group.

14. The electric toothbrush head according to claim 1, characterized in that: The brush plate is provided with a through hole, the buffer portion and the second brush filaments are integrally formed, and the second brush filaments pass through the through hole and extend from the first surface of the brush plate.

15. The electric toothbrush head according to claim 1, characterized in that: The brush plate is provided with a notch, and the second brush filaments are arranged in the notch and extend in a direction away from the buffer portion.

16. The electric toothbrush head according to claim 15, characterized in that: The brush plate comprises a plurality of hair-implanted portions, a first surface of each of the hair-implanted portions is provided with the first brush filaments, and the plurality of hair-implanted portions are spaced apart from each other to form the gap.

17. The electric toothbrush head according to claim 16, characterized in that: In the thickness direction of the electric toothbrush head, the thickness of the buffer portion at a portion corresponding to the notch is greater than the thickness of the buffer portion at a portion corresponding to the first brush filament.

18. The electric toothbrush head according to claim 1, characterized in that: In the thickness direction of the electric toothbrush head, the buffer portion includes a first side and a second side opposite to each other, the first side of the buffer portion faces the first surface of the brush plate, and the second brush filaments are arranged on the first side of the buffer portion; in the thickness direction of the electric toothbrush head, the first side of the buffer portion is lower than the first surface of the brush plate.

19. An electric toothbrush, characterized in that: include: The electric toothbrush head according to any one of claims 1 to 18; and A brush handle, wherein the electric toothbrush head is mounted on the brush handle.

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