Brush head and oral care apparatus

Abstract

Disclosed are a brush head (10) and an oral care apparatus (100). The brush head (10) comprises a brush handle (11), a brush plate (12), a bristle tufting assembly (13), bristles (14), and a soft rubber member (15). A first end (11a) of the brush handle (11) is configured to be detachably connected to a main machine (20) of the oral care apparatus (100). The brush plate (12) comprises a support portion (121) and a connection portion (122). The support portion (121) is connected to a second end (11b) of the brush handle (11). The bristle tufting assembly (13) at least comprises a first bristle tufting plate (131) formed with a first bristle tufting region (1311) and a second bristle tufting plate (132) formed with a second bristle tufting region (1321). The first bristle tufting plate (131) is connected to the support portion (121) via the connection portion (122), and the second bristle tufting plate (132) is disposed at one end of the first bristle tufting plate (131) and is connected to the support portion (121). At least a part of the bristles (14) are disposed in the first bristle tufting region (1311) and the second bristle tufting region (1321), and at least when the bristles (14) located in the first bristle tufting region (1311) are stressed, the connection portion (122) can be deformed to change the relative positions of the first bristle tufting plate (131) and the second bristle tufting plate (132). The soft rubber member (15) covers at least part of the region of the back surface and circumferential side surface of the brush plate (12), and fills at least a part of the gaps in the brush head (10).

Description

Brush heads and oral care devices

[0001] This application claims priority to Chinese Patent Application No. 202520614814.8, filed April 1, 2025, entitled "Brush Head and Oral Care Device"; Chinese Patent Application No. 202520928606.5, filed May 12, 2025, entitled "Brush Head and Oral Care Device"; and Chinese Patent Application No. 202520524929.8, filed March 23, 2025, entitled "Brush Head and Oral Care Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of oral hygiene technology, and more particularly to a brush head and oral care device. Background Technology

[0003] With increasing emphasis on personal hygiene and health, oral hygiene is receiving more and more attention. A toothbrush head consists of bristle attachments and a connecting rod for securing them. To enhance cleaning effectiveness, the bristle tips are typically designed with different curved or toothed shapes. However, different users have different tooth shapes, and even different parts of the same user's teeth can vary in shape. It's difficult for the bristles to perfectly match the tooth shape, resulting in ineffective contact with all teeth and affecting the toothbrush's cleaning performance. Summary of the Invention

[0004] The main objective of this application is to provide a brush head and an oral care device.

[0005] Firstly, this application provides a brush head, comprising:

[0006] A brush handle, the brush handle including opposing first and second ends, the first end of the brush handle being configured to be detachably connected to the main unit of an oral care device;

[0007] A brush plate, the brush plate including a support part and a connecting part, the support part being connected to the second end of the brush handle, and the connecting part being connected to the support part;

[0008] A hair-planting assembly, comprising at least a first hair-planting plate having a first hair-planting area and a second hair-planting plate having a second hair-planting area, wherein the first hair-planting plate is connected to the support portion via the connecting portion, and the second hair-planting plate is disposed at one end of the first hair-planting plate and connected to the support portion, wherein a gap is formed between the first hair-planting plate and the second hair-planting plate, and / or a gap is formed between the first hair-planting plate and the support portion;

[0009] The bristles, at least some of which are disposed in the first bristle planting area and the second bristle planting area, and the connecting portion can deform to change the relative position of the first bristle planting plate and the second bristle planting plate when the bristles located in the first bristle planting area are subjected to force.

[0010] A soft rubber component that covers at least a portion of the back and peripheral sides of the brush plate and fills at least a portion of the gaps.

[0011] As can be seen from the above implementation scheme description, based on the fact that when the bristles located in the first bristle implantation area are subjected to force, the connecting part can deform to change the relative position of the first bristle implantation plate and the second bristle implantation plate. Thus, when the first bristle implantation plate swings relative to the second bristle implantation plate following the deformation of the connecting part, the bristles set on the first bristle implantation plate can adjust the relative position between the bristles and the target to be cleaned (such as the tooth surface or gap) according to the swing of the first bristle implantation plate. This allows the bristles to adapt to various tooth surfaces, and ultimately can effectively enhance the cleaning effect of the bristles on the teeth and improve brushing efficiency.

[0012] Meanwhile, the soft rubber parts cover at least part of the back and sides of the brush plate, which can effectively reduce the discomfort caused by unnecessary collisions between the back and sides of the brush plate and teeth in the mouth during oral cleaning with an oral care device with a brush head, thus improving the comfort of oral cleaning.

[0013] Furthermore, by filling at least part of the gaps inside the brush head with soft rubber components, the connection part of the brush head can be deformed, while the overall strength of the brush head can also be effectively enhanced.

[0014] In some embodiments, the connecting portion is strip-shaped, wherein the length of the connecting portion along the length direction is greater than the width along the width direction; or, the width of the connecting portion along the width direction is greater than the length along the length direction.

[0015] In some embodiments, the cross-sectional area of ​​the connecting portion gradually decreases from the connection end with the support portion toward the connection end with the first flocking plate; or, the cross-sectional area of ​​the connecting portion gradually increases from the connection end with the support portion toward the connection end with the first flocking plate; or, the cross-sectional area of ​​the connecting portion is the same from the connection end with the support portion toward the connection end with the first flocking plate; or, the cross-sectional area of ​​the connecting portion first decreases and then increases from the connection end with the support portion toward the connection end with the first flocking plate.

[0016] In some embodiments, when the bristles located in the first bristle-planting area are subjected to force, the first bristle-planting plate can at least sway relative to the support portion along a first direction and a second direction, the first direction being the extension direction of the brush handle, and the second direction being set at an angle to the first direction.

[0017] In some embodiments, the support includes a first section whose projection on the brush plate is located in the gap between the first and second tufting plates, and the first section has a strip-shaped or rectangular cross-section on the plane formed by the second direction and the third direction, wherein the third direction is perpendicular to the extension direction of the brush handle.

[0018] In some embodiments, the projection of the connecting portion onto the first tufting plate along the first direction is located in the middle region of the first tufting plate; or, the projection of the connecting portion onto the first tufting plate along the first direction is located at one side edge of the first tufting plate, the first direction being the extension direction of the brush handle; or, one end of the connecting portion is connected to the middle region of the first tufting plate, or one end of the connecting portion is connected to one side edge of the first tufting plate.

[0019] In some embodiments, the support portion has a first support projection on the first tufting plate, the width of the first support projection in a third direction being smaller than the width of the first tufting plate, the third direction being perpendicular to the extension direction of the brush handle.

[0020] In some embodiments, the second bristle plate is disposed at the end of the first bristle plate away from the brush handle, and a gap is formed between the second bristle plate and the first bristle plate.

[0021] In some embodiments, the sidewall of the second hair-planting plate protrudes from the side of the first hair-planting plate, and the sidewall of the first hair-planting plate is recessed from the side of the second hair-planting plate; or, the sidewall of the second hair-planting plate is recessed from the side of the first hair-planting plate, and the sidewall of the first hair-planting plate protrudes from the side of the second hair-planting plate.

[0022] In some embodiments, at least when the bristles in the second bristle-planting area are under force, the second bristle-planting plate can tilt and sway at least in a second direction, which is a direction perpendicular to the extension direction of the brush handle.

[0023] In some embodiments, the support portion connected to the second flocking plate is an arc-shaped structure protruding away from the first flocking plate.

[0024] In some embodiments, the second flocking plate is rigidly connected to the support portion.

[0025] In some embodiments, the projection of the support portion onto the second tufting plate along the first direction is located in the middle region of the second tufting plate, or the projection of the support portion onto the second tufting plate along the first direction is located on one side edge of the second tufting plate, where the first direction is the extending direction of the brush handle.

[0026] In some embodiments, the second tufting plate is disposed at one end of the first tufting plate near the brush handle, and a gap is formed between the second and the first tufting plate.

[0027] In some embodiments, the brush head further includes a third bristle-planting plate, which is disposed at the end of the first bristle-planting plate near the brush handle and connected to the support portion.

[0028] In some embodiments, the third flocking plate is rigidly connected to the support portion.

[0029] In some embodiments, the sidewall of the third hair-planting plate protrudes on the side closest to the first hair-planting plate, and the sidewall of the first hair-planting plate is recessed on the side closest to the third hair-planting plate; or, the sidewall of the third hair-planting plate is recessed on the side closest to the first hair-planting plate, and the sidewall of the first hair-planting plate protrudes on the side closest to the third hair-planting plate.

[0030] In some embodiments, the support includes a second section whose projection on the brush plate is located in the gap between the second and third tufting plates, and the cross-section of the second section on the plane forming the second and third directions is elongated or rectangular, the third direction being perpendicular to the extension direction of the brush handle.

[0031] In some embodiments, the brush head includes a brush plate assembly, which includes a brush plate and the bristle-planting assembly. The brush plate assembly has opposing first and second surfaces, the first surface being the back surface of the brush plate assembly, and the second surface having bristle-planting areas, including the first bristle-planting area and the second bristle-planting area. The brush plate assembly has opposing first and second ends along the length direction of the brush handle. The brush plate assembly includes a joint, a transition portion, and a first clearance portion along its length direction. The joint is connected to the brush handle, the transition portion is located between the joint and the first clearance portion, and the point of maximum thickness of the brush plate assembly along its thickness direction is located at the transition portion. The length of the first clearance portion along the length direction of the brush handle is greater than half the length from the second end of the brush plate assembly to the end of the bristle-planting area near the brush handle, and the thickness of the first clearance portion decreases towards the side away from the brush handle.

[0032] In some embodiments, the distance between the projection point of the maximum thickness point in the bristle-planting area and the second end of the brush plate assembly is greater than half the length from the second end of the brush plate assembly to the end of the bristle-planting area near the brush handle.

[0033] In some embodiments, the adapter portion varies less than 0.5 mm in the thickness direction of the brush assembly.

[0034] In some embodiments, the outer surface of the first avoidance portion on the side away from the hair-planting area includes at least a partial arcuate surface, and the arcuate surface has one and only one arcuate bend in the length and thickness directions.

[0035] In some embodiments, the first surface has a thickness abrupt change point; wherein the thickness abrupt change point is located on the outer surface of the first clearance portion away from the hair-planting area, or the thickness abrupt change point is located on the outer surface of the joint portion away from the hair-planting area.

[0036] In some embodiments, the distance between the first surface and the second surface at the endpoint of the second end of the brush assembly is less than 4 mm; and / or, the distance between the projection point of the point of maximum thickness in the hair-planting area and the second end of the brush assembly is greater than 12 mm; and / or, the maximum thickness between the first surface and the second surface is greater than 4 mm and less than 8 mm.

[0037] In some embodiments, the thickness of the brush assembly along the thickness direction increases and then decreases from the second end of the brush assembly to the first end of the brush assembly.

[0038] In some embodiments, the line connecting the first surface from the second end of the brush assembly to the point of maximum thickness has a first slope; the line connecting the first surface from the point of maximum thickness to the end of the brush assembly near the brush handle has a second slope, and the absolute value of the first slope is greater than the absolute value of the second slope.

[0039] In some embodiments, the brush assembly further includes a second clearance portion disposed on opposite sides of the adapter portion along the width direction.

[0040] In some embodiments, the second clearance portion is recessed toward the side closer to the second surface.

[0041] In some embodiments, at the point of maximum thickness, the first surface has a second width W2 in the width direction of the brush assembly, the bristle-planting area has a first width W1, and W2 < 1 / 2 * W1.

[0042] In some embodiments, the brush assembly further includes a brush plate component and the soft rubber component, the soft rubber component covering at least a portion of the back and peripheral sides of the brush plate component; the first surface is the back of the soft rubber component, and the second surface is the side surface of the brush plate component away from the back of the soft rubber component.

[0043] In some embodiments, the back surface of the brush plate component is arc-shaped, and the thickness of the back surface of the brush plate component and the second surface in the thickness direction increases and then decreases from the second end of the brush plate assembly to the first end of the brush plate assembly; and the thickness of the back surface of the soft rubber component and the second surface in the thickness direction increases and then decreases from the second end of the brush plate assembly to the first end of the brush plate assembly; wherein the maximum thickness point of the back surface of the brush plate component and the second surface in the thickness direction is located between the maximum thickness point of the back surface of the soft rubber component and the second surface in the thickness direction and the first end of the brush plate assembly.

[0044] In some embodiments, the back of the soft rubber component corresponding to the thickness increase interval from the second end of the brush assembly to the maximum thickness point has a first average thickness, and the back of the soft rubber component corresponding to the thickness decrease interval from the maximum thickness point to the first end of the brush assembly has a second average thickness, wherein the first average thickness is greater than the second average thickness.

[0045] In some embodiments, the projection of the connecting portion along its length onto the hair-planting area is located on the side of the support member near the second end of the brush plate assembly; wherein, the back of the soft rubber part corresponding to the thickness increase interval from the second end of the brush plate assembly to the maximum thickness point has a first average thickness, and the back of the soft rubber part corresponding to the thickness decrease interval from the maximum thickness point to the first end of the brush plate assembly has a second average thickness, and the first average thickness is greater than the second average thickness.

[0046] Secondly, this application also provides an oral care device, including a main unit and the aforementioned brush head, wherein the brush head is detachably connected to the main unit.

[0047] 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

[0048] 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.

[0049] Figure 1(a) is a three-dimensional structural schematic diagram of the oral cleaning device provided in an embodiment of this application;

[0050] Figure 1(b) is a three-dimensional structural diagram of the main unit of the oral cleaning device provided in one embodiment of this application;

[0051] Figure 2 is a three-dimensional structural diagram of the brush head provided in one embodiment of this application;

[0052] Figure 3 is a first-view exploded view of the structure of the brush head provided in one embodiment of this application;

[0053] Figure 4 is a first-view structural diagram of the brush head handle and other components adapted in an embodiment of this application.

[0054] Figure 5 is a second-view structural diagram of the brush head handle and other components adapted in one embodiment of this application;

[0055] Figure 6A is a structural schematic diagram of one implementation of the first bristle-planting plate of the brush head provided in an embodiment of this application;

[0056] Figure 6B is a structural schematic diagram of another implementation of the first bristle-planting plate of the brush head provided in one embodiment of this application.

[0057] Figures 7A to 7D are cross-sectional structural diagrams corresponding to various implementations of the connecting part between the first bristle plate and the support part in a brush head provided in an embodiment of this application.

[0058] Figure 8 is a partial structural schematic diagram of a modified embodiment of the third bristle plate of the brush head provided in one embodiment of this application.

[0059] Figure 9 is a partially enlarged structural diagram of the brush head provided in another embodiment of this application;

[0060] Figure 10 is a partial three-dimensional structural diagram of a brush head without bristles provided in another embodiment of this application;

[0061] Figure 11 is a four-dimensional structural diagram of the brush head provided in another embodiment of this application from a fourth perspective;

[0062] Figure 12 is a schematic diagram of a modified structure of the brush head provided in another embodiment of this application;

[0063] Figure 13 is a first-view exploded structural diagram of the brush head provided in another embodiment of this application. Detailed Implementation

[0064] 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.

[0065] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0066] 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.

[0067] Please refer to Figure 1. Figure 1(a) is a three-dimensional structural schematic diagram of an oral care device provided in an embodiment of this application.

[0068] As shown in Figures 1(a) and 1(b), the oral care device 100 includes a main unit 20 and a brush head 10. The main unit 20 includes a drive component 21 and a control component 22 connected to the drive component 21. The drive component 21 is detachably connected to the brush head 10 and is configured to drive the brush head 10 to move. The user can trigger the control component 22 by pressing, sliding, pushing, pulling, etc., so that the control component 22 controls the drive component 21 to perform corresponding actions. It is understood that the oral care device 100 includes, but is not limited to, an electric toothbrush.

[0069] Optionally, the drive assembly 21 and the brush head 10 can be detachably connected in ways including but not limited to structural engagement and threaded connection. Typically, after a period of use, the cleaning effectiveness of the brush head 10 of the oral care device 100 will decrease or it will become contaminated. This may lead to a decline in oral hygiene or even affect human health, thus requiring periodic replacement. Therefore, the detachable connection between the drive assembly 21 and the brush head 10 allows the oral care device 100 to be replaced only with the brush head 10 when replacement is needed, avoiding unnecessary waste.

[0070] For example, the control component 22 is connected to the electric motor of the drive component 21 via a connecting wire to supply power to the drive component 21, thereby driving the drive component 21 to move and thus driving the brush head 10 to operate. The drive component 21 includes an electric motor, and the brush head 10 can be detachably connected to the output shaft of the electric motor. The brush head 10 can vibrate under the drive of the electric motor to clean the inside of the oral cavity.

[0071] Optionally, the electric motor can be set with different vibration modes, such as fast vibration, medium vibration and interval vibration, so that the brush head 10 can vibrate in different ways, and users can choose according to their own usage habits.

[0072] Optionally, the control component 22 includes a trigger switch, a circuit board, and a power supply module, the power supply module including but not limited to a battery. The user performs a corresponding trigger operation on the trigger switch, causing the trigger switch to output a corresponding trigger signal to the circuit board. The circuit board then controls the drive component 21 and the power supply module of the host 20 to perform corresponding operations based on the received trigger signal, such as powering on, powering off, and selecting vibration mode.

[0073] Example 1

[0074] Referring to Figures 2 to 4 and Figure 13, in some embodiments, the brush head 10 includes a handle 11, a brush plate 12, a bristle assembly 13, bristles 14, and a soft rubber component 15. The handle 11 includes a first end 11a and a second end 11b, and the first end 11a of the handle 11 is configured to be detachably connected to the main unit 20 of the oral care device 100. Optionally, the detachable connection between the handle 11 and the main unit 20 includes, but is not limited to, threaded connection, structural engagement, interference fit, etc.

[0075] The brush plate 12 includes a support part 121 and a connecting part 122. The support part 121 is connected to the second end 11b of the brush handle 11, and the connecting part 122 is connected to the support part 121, as shown in Figure 3.

[0076] The tufting assembly 13 includes at least a first tufting plate 131 having a first tufting area 1311 and a second tufting plate 132 having a second tufting area 1321. The first tufting plate 131 is connected to the support portion 121 via a connecting portion 122, and the second tufting plate 132 is disposed at one end of the first tufting plate 131 and connected to the support portion 121. A gap 17 is formed between the first tufting plate 131 and the second tufting plate 132, and / or a gap 17 is formed between the first tufting plate 131 and the support portion 121.

[0077] At least some of the bristles 14 are disposed in the first bristle implantation area 1311 and the second bristle implantation area 1321. When the bristles 14 located in the first bristle implantation area 1311 are subjected to force, the connecting part 122 can deform, thereby causing the first bristle implantation plate 131 to swing or move, so as to change the relative position of the first bristle implantation plate 131 and the second bristle implantation plate 132. This allows the bristles 14 disposed in the first bristle implantation area 1311 to swing or move with the first bristle implantation plate 131. Ultimately, the relative position between the bristles 14 and the target to be cleaned (such as the tooth surface or gaps) can be adjusted. This allows the bristles 14 of the brush head 10 to adapt to various tooth surfaces when the user is cleaning their teeth. The overall position of the bristles 14 can be changed according to the different forces applied by the user when brushing their teeth, which can effectively enhance the cleaning effect of the bristles 14 on the teeth and improve brushing efficiency.

[0078] The soft rubber part 15 covers at least a portion of the back and peripheral sides of the brush plate 12 and fills at least a portion of the gaps. Optionally, the back of the brush plate 12 includes at least a support portion 121 on the side surface away from the bristles 14, and the peripheral side of the brush plate 12 includes at least a connecting portion 122 on the peripheral side surface in the direction perpendicular to the extension of the brush handle 11.

[0079] It is understood that the way the bristles 14 are set in the first bristle planting area 1311 and the second bristle planting area 1321 can be that bristle planting holes are provided in the first bristle planting area 1311 and the second bristle planting area 1321, and one end of the bristles 14 is fixed to the corresponding bristle planting area through the bristle planting holes. The shape of the bristle planting holes can be square, arc, polygon, etc., and there is no limitation here.

[0080] As can be seen from the above implementation scheme description, when the bristles 14 located in the first bristle implantation area 1311 are subjected to force, the connecting part 122 can deform to change the relative position of the first bristle implantation plate 131 and the second bristle implantation plate 132. This allows the bristles 14 located on the first bristle implantation plate 131 to adjust the relative position between the bristles 14 and the target to be cleaned (such as the tooth surface or gap) as the first bristle implantation plate 131 tilts relative to the second bristle implantation plate 132 following the tilt of the first bristle implantation plate 131. This allows the bristles 14 to adapt to various tooth surfaces, ultimately effectively enhancing the cleaning effect of the bristles 14 on the teeth and improving brushing efficiency. It is understood that changing the relative position of the first bristle implantation plate 131 and the second bristle implantation plate 132 can be a relative positional shift between the first bristle implantation plate 131 and the second bristle implantation plate 132, or a relative angular shift between the first bristle implantation plate 131 and the second bristle implantation plate 132. No limitation is made here.

[0081] Meanwhile, the soft rubber part 15 covers at least part of the back and peripheral sides of the brush plate 12, thereby effectively reducing the discomfort caused by unnecessary collisions between the back and peripheral sides of the brush plate 12 and teeth in the mouth during oral cleaning with the oral care device 100 with the brush head 10, thus improving the comfort of oral cleaning.

[0082] Furthermore, by filling at least part of the gap 17 inside the brush head with the soft rubber part 15, the connecting part 122 of the brush head can be deformed, which not only strengthens the bonding between the soft rubber part 15 and the brush plate 12, but also effectively enhances the overall strength of the brush head.

[0083] In some embodiments, when the bristles 14 located in the first bristle-planting area 1311 are subjected to force, the first bristle-planting plate 131 can at least sway relative to the support portion 121 along a first direction and a second direction, the first direction being the extension direction of the brush handle 11, and the second direction being set at an angle to the first direction. Optionally, the first direction and the second direction are perpendicular to each other.

[0084] As shown in Figure 13, the first direction is the direction extending along the brush handle 11, which is also the length direction of the brush handle 11, i.e., the X-axis extension direction. The second direction is the vertical direction and perpendicular to the first direction, i.e., the Z-axis extension direction. The third direction is the Y-axis extension direction. When the bristles 14 in the first bristle implantation area 1311 are under force, the first bristle implantation plate 131 can swing relative to the support part 121 in at least two different directions, namely the first direction and the second direction. That is, the first bristle implantation plate 131 can swing in the horizontal direction extending along the brush handle 11 and in the vertical direction perpendicular to the horizontal direction extending along the brush handle 11. On the one hand, this allows the bristles 14 to adapt to various tooth surfaces. On the other hand, during the brushing process, the brush plate 12 constantly changes position in the user's mouth, and the first bristle implantation plate 131 can swing more quickly, thus better conforming to the user's tooth surface, ultimately effectively enhancing the cleaning effect of the bristles 14 on the teeth and improving brushing efficiency.

[0085] Please refer to Figures 1 and 5. In some embodiments, the projection of the connecting part 122 along the first direction onto the first hair-planting plate 131 is located in the middle region of the first hair-planting plate 131, or the projection of the connecting part 122 along the first direction onto the first hair-planting plate 131 is located on one side edge of the first hair-planting plate 131, where the first direction is the extending direction of the brush handle 11.

[0086] For example, one end of the connecting portion 122 is connected to the middle region of the first flocking plate 131, so that the projection of the connecting portion 122 along the first direction onto the first flocking plate 131 is located in the middle region of the first flocking plate 131. Alternatively, one end of the connecting portion 122 is connected to one side edge of the first flocking plate 131, so that the projection of the connecting portion 122 along the first direction onto the first flocking plate 131 is located on one side edge of the first flocking plate 131.

[0087] After the first bristle plate 131 is connected to the support part 121 by the connecting part 122 in the above-mentioned connection method, the first bristle plate 131 is more likely to swing relative to the support part 121 or swing to a greater extent under the action of external force, thereby making the bristles 14 have more contact angles with the teeth, which can effectively enhance the cleaning effect of the bristles 14 on the teeth and improve the brushing efficiency.

[0088] In an optional embodiment, one end of the connecting part 122 is connected to the middle area of ​​the first bristle plate 131. When the bristles 14 on the first bristle plate 131 are subjected to force, the first bristle plate 131 can tilt or sway more flexibly in different directions, thereby improving the adaptability of the bristles 14 and the user's tooth surface more flexibly according to the force on the bristles 14 on the first bristle plate 131.

[0089] In an optional embodiment, one end of the connecting portion 122 is connected to one side edge of the first bristle plate 131. When the bristles 14 on the first bristle plate 131 are subjected to force, compared to when one end of the connecting portion 122 is connected to the middle area of ​​the first bristle plate 131, the user only needs to apply less force when brushing to achieve a positional change between the first bristle plate 131 and the second bristle plate 132, thereby reducing the difficulty of adapting the bristles 14 to the user's tooth surface. For example, when one end of the connecting portion 122 is connected to one side edge of the first bristle plate 131 along the extension direction of the brush handle 11, the first bristle plate 131 is more likely to change position on the side away from the connecting portion 122 along the extension direction of the brush handle 11. When one end of the connecting portion 122 is connected to one side edge of the first bristle plate 131 along a third direction, the first bristle plate 131 is more likely to change position on the side away from the connecting portion 122 along a third direction. In some embodiments, the support portion 121 has a first support projection on the first tufting plate 131, the width of the first support projection in the third direction being smaller than the width of the first tufting plate 131, and the third direction being perpendicular to the extension direction of the brush handle 11.

[0090] As shown in Figure 5, the support portion 121 forms a first notch and a second notch on opposite sides in the first direction. The first tufting member 121 is partially exposed in at least one of the first and second notches. That is, the first tufting member 121 has a first projection in the second direction, and the first projection is at least partially located within the first notch and / or the second notch. Furthermore, the support portion 121 has a first support projection on the first tufting plate 131. The width of the first support projection is the width of the support portion 121 above the first tufting plate 131. The projection width of the first support projection in the Y-axis direction is D2, and the width of the first tufting member 12 in the Y-axis direction is D1, where D1 > D2.

[0091] Since the width of the projection of the support portion 121 onto the first hair-planting plate 131 is smaller than the width of the first hair-planting plate 131, when the first hair-planting plate 131 is subjected to force, at least one edge of the first hair-planting plate 131 is not rigidly supported by the support portion 121, making it easier for the first hair-planting plate 131 to deform along the first direction. Consequently, under the action of external force, the first hair-planting plate 131 can swing relative to the support portion 121 on opposite sides along the first direction, or the swing amplitude can be greater.

[0092] In some embodiments, the first flocking plate 131 has a thickening member in the edge region in the third direction. Alternatively, the thickness of the first flocking plate 131 in the edge region in the third direction is greater than the thickness in the non-edge region in the third direction, and the connecting portion 122 connects the non-edge region of the first flocking plate 131.

[0093] As shown in Figures 6A and 6B, the thickness of the edge region of the first bristle-planting plate 131 is D3, and the thickness of the non-edge region of the first bristle-planting plate 131 is D4, where D3 > D4. This means that the edge region of the first bristle-planting plate 131 is thickened, making it easier for the connecting part 122 to deform when an external force is applied to the edge of the first bristle-planting plate 131. In addition, when the bristle-planting method of the brush head 10 is copper bristle-planting, setting the thickness of the edge region of the first bristle-planting plate 131 to be greater than the thickness of the non-edge region of the bristle-planting plate 131 ensures that the first bristle-planting plate 131 has better structural strength when bristling the brush head 10, providing structural support for the bristle-planting process.

[0094] In some embodiments, the connecting portion 122 is strip-shaped, wherein the length of the connecting portion 122 along the length direction is greater than its width along the width direction, or the width of the connecting portion 122 along the width direction is greater than its length along the length direction. For example, the connecting portion 122 is elongated, rectangular, or cylindrical. The length of the connecting portion 122 along the length direction is the extension length of the connecting portion 122 along the first direction, and the width of the connecting portion 122 along the width direction is the extension width of the connecting portion 122 along the third direction. The extension length and width in the two directions are different. By setting the connecting portion 122 to be strip-shaped and setting the thickness of the connecting portion 122 in the length and width directions to different dimensions, it is convenient for the connecting portion 122 to deform under the trigger of external force.

[0095] In some embodiments, the cross-sectional area of ​​the connecting portion 122 gradually decreases from the connection end with the support portion 121 toward the connection end with the first flocking plate 131, as shown in FIG7A.

[0096] Optionally, the cross-sectional area of ​​the connecting part 122 gradually increases from the connection end with the support part 121 toward the connection end with the first flocking plate 131, as shown in Figure 7B.

[0097] Optionally, the cross-sectional area of ​​the connecting part 122 decreases and then increases from the connection end with the support part 121 toward the connection end with the first flocking plate 131, as shown in Figure 7C.

[0098] The above-mentioned connection part 122 is designed to thin the connection structure between the support part 121 and the first flocking plate 131, thereby making the connection part 122 more prone to deformation under external force.

[0099] In some embodiments, the connecting portion 122 has the same cross-sectional area from the connection end with the support portion 121 towards the connection end with the first flocking plate 131, as shown in FIG7D. The manufacturing process of the connecting portion 122 formed by this embodiment is relatively simple and the product yield is high.

[0100] As shown in Figures 3, 4, and 13, in some embodiments, the second tufting plate 132 is disposed at the end of the first tufting plate 131 away from the brush handle 11, and a gap 17 is formed between the second tufting plate 132 and the first tufting plate 131. It can be understood that the second tufting plate 132 and the support portion 121 can be rigidly connected or non-rigidly connected.

[0101] For example, the second tufting plate 132 is rigidly connected to the support portion 121. Since the second tufting plate 132 is located at the end of the first tufting plate 131 away from the brush handle 11, if the head of the brush head 10 falls, the second tufting plate 132 will usually contact the ground first. Compared with the first tufting plate 131, the connection strength between the second tufting plate 132 and the support portion 121 is higher, thereby effectively protecting the swingable first tufting plate 131 and preventing the brush head 10 from falling and causing damage to the connection portion 122. In addition, the rigid connection between the second tufting plate 132 and the support portion 121 can effectively transmit the driving force of the drive component 21 to the second tufting plate 132 through the support portion 121, thereby reducing the vibration attenuation of the second tufting plate 132.

[0102] For example, the second bristle plate 132 is not rigidly connected to the support portion 121, meaning that the second bristle plate 132 can tilt relative to the brush handle 11. For instance, at least when the bristles 14 located in the second bristle area 1321 are under force, the second bristle plate 132 can tilt at least in a second direction, which is the direction perpendicular to the extension direction of the brush handle 11. Since both the first bristle plate 131 and the second bristle plate 132 can tilt at corresponding angles, more bristles 14 have more contact angles with the teeth, which can effectively enhance the cleaning effect of the bristles 14 on the teeth and improve brushing efficiency.

[0103] In some embodiments, the second tufting plate 132 is disposed at the end of the first tufting plate 131 away from the brush handle 11, and forms a gap 17 between the two. The support portion 121 connected to the second tufting plate 132 is an arc-shaped structure protruding away from the first tufting plate 131. By designing the support portion 121 as an arc-shaped structure, the discomfort of the brush head 10 touching the teeth during use can be effectively reduced, and the comfort of oral care can be improved.

[0104] In some embodiments, the support portion 121 includes a first section. The projection of the first section on the brush plate 12 is located in the gap between the first tufting plate 131 and the second tufting plate 132. The cross-section of the first section on the plane forming the second and third directions is elongated or rectangular. This arrangement ensures that the support portion 121 has a certain structural strength, preventing the support portion 121 from breaking in the first section when the brush head 10 is dropped, thus affecting the life of the brush head. On the other hand, it increases the deformation of the second tufting plate 132, ensuring that the second tufting plate 132 can undergo slight swaying or torsion.

[0105] In some embodiments, the deformation of the second bristle plate 132 toward the side closer to the bristles 14 is greater than the deformation toward the side farther from the bristles 14. When the user cleans their mouth, when the user's oral tissues are pressed against the back of the second bristle plate 132, the second bristle plate 132 can deform more easily toward the bristles 14, thereby making it easier to clean the inside of the user's teeth and improving the cleaning effect of the brush head 10.

[0106] In some embodiments, the sidewall of the second bristle-planting plate 132 protrudes near the sidewall of the first bristle-planting plate 131, while the sidewall of the first bristle-planting plate 131 near the sidewall of the second bristle-planting plate 132 is recessed. Alternatively, the sidewall of the second bristle-planting plate 132 near the sidewall of the first bristle-planting plate 131 is recessed, while the sidewall of the first bristle-planting plate 131 near the sidewall of the second bristle-planting plate 132 protrudes, as shown in Figure 4. With this design, the bristle-planting holes of the first bristle-planting plate 131 and the second bristle-planting plate 132 can be arranged along the edges of their adjacent sidewalls, effectively increasing the longitudinal density of the bristle-planting holes between the second bristle-planting plate 132 and the first bristle-planting plate 131, thereby improving the bristle density of the brush head.

[0107] In some embodiments, the projection of the support portion 121 along the first direction onto the second hair-planting plate 132 is located in the middle region of the second hair-planting plate 132, or the projection of the support portion 121 along the first direction onto the second hair-planting plate 132 is located on one side edge of the second hair-planting plate 132, where the first direction is the extending direction of the brush handle 11.

[0108] As shown in Figure 3, one end of the support portion 121 is connected to the middle region of the second flocking plate 132, so that the projection of the support portion 121 along the first direction onto the second flocking plate 132 is located in the middle region of the second flocking plate 132. Alternatively, one end of the support portion 121 is connected to one side edge of the second flocking plate 132, so that the projection of the support portion 121 along the first direction onto the second flocking plate 132 is located on one side edge of the second flocking plate 132.

[0109] After the second bristle plate 132 is connected to the support part 121 by the above connection method, the second bristle plate 132 is more likely to swing under the action of external force or the swing amplitude is greater, thereby making the bristles 14 have more contact angles with the teeth, which can effectively enhance the cleaning effect of the bristles 14 on the teeth and improve the brushing efficiency.

[0110] In some embodiments, the second bristle plate 132 is disposed at the end of the first bristle plate 131 near the brush handle 11, forming a gap between them. Optionally, the second bristle plate 132 is not rigidly connected to the support portion 121, meaning the second bristle plate 132 can tilt relative to the brush handle 11. For example, at least when the bristles 14 located in the second bristle area 1321 are under force, the second bristle plate 132 can tilt at least in a second direction, which is the direction perpendicular to the extension direction of the brush handle 11. Since both the first bristle plate 131 and the second bristle plate 132 can tilt at corresponding angles, more bristles 14 have more contact angles with the teeth, effectively enhancing the cleaning effect of the bristles 14 on the teeth and improving brushing efficiency.

[0111] As shown in Figures 3, 4 and 13, in some embodiments, the brush head 10 further includes a third bristle-planting plate 133, which is disposed at the end of the first bristle-planting plate 131 near the brush handle 11 and connected to the support portion 121. The third bristle-planting plate 133 forms a third bristle-planting area 1331, and some bristles 14 are disposed in the third bristle-planting area 1331.

[0112] Optionally, the third bristle plate 133 is rigidly connected to the support part 121. Through the rigid connection, the third bristle plate 133 can better avoid vibration attenuation caused by non-rigid connection, thereby ensuring the cleaning power of the bristles of the third bristle plate 133.

[0113] In some embodiments, the support portion 121 includes a second section. The projection of the second section on the brush plate 12 is located in the gap between the second tufting plate 132 and the third tufting plate 133. The cross-section of the second section on the plane forming the second and third directions is elongated or rectangular. This arrangement ensures that the support portion 121 has a certain structural strength, preventing the support portion 121 from breaking in the second section when the brush head 10 is dropped, thus affecting the life of the brush head. On the other hand, it increases the deformation of the first tufting plate 131, ensuring that the first tufting plate 131 can undergo slight swaying or torsion.

[0114] It is understood that the way the bristles 14 are set in the third bristle planting area 1331 includes, but is not limited to, the third bristle planting area 1331 being provided with bristle planting holes, and the bristles 14 being fixed in the third bristle planting area 1331 through the bristle planting holes.

[0115] Optionally, the sidewall of the third tufting plate 133 near the first tufting plate 131 protrudes, while the sidewall of the first tufting plate 131 near the third tufting plate 133 is recessed. Alternatively, the sidewall of the third tufting plate 133 near the first tufting plate 131 is recessed, while the sidewall of the first tufting plate 131 near the third tufting plate 133 protrudes. This design effectively increases the density of the tufting holes between the third tufting plate 133 and the first tufting plate 131, effectively reducing the spacing of the bristles 14 between the first and third tufting plates 131, and increasing the bristle density of the brush head.

[0116] Optionally, the projection of the support portion 121 onto the third bristle plate 133 along the first direction is located in the middle region of the third bristle plate 133, and the first direction is the extension direction of the brush handle 11.

[0117] As shown in Figure 3 or Figure 4, one end of the support portion 121 is connected to the middle region of the third flocking plate 133, so that the projection of the support portion 121 along the first direction on the third flocking plate 133 is located in the middle region of the third flocking plate 133.

[0118] Referring to Figure 8, in some embodiments, the third bristle plate 133 is connected to the support portion 121, and the brush handle 11 and the connecting portion 122 are connected through the support portion 121. At the same time, there is a gap between the third bristle plate 133 and the support portion 121, and there is also a gap between the third bristle plate 133 and the first bristle plate 131. This allows the support portion 121 connected to the third bristle plate 133 to deform under stress, thereby causing the first bristle plate 131 to sway, which in turn effectively enhances the cleaning effect of the bristles 14 on the teeth and improves brushing efficiency.

[0119] Optionally, the projection of the support portion 121 on the third tufting plate 133 along the first direction is located in the middle region of the third tufting plate 133, or the projection of the support portion 121 on the third tufting plate 133 along the first direction is located on one side edge of the third tufting plate 133, where the first direction is the extension direction of the brush handle 11.

[0120] Example 2

[0121] Please refer to Figures 2 and 9 to 10. In some embodiments, the brush head 10 includes a brush handle 11, a brush plate assembly 18, and brush bristles 14.

[0122] One end of the brush handle 11 is configured to be detachably connected to the main unit 20 of the oral care device 100.

[0123] The brush plate assembly 18 has a first end 18C and a second end 18d opposite each other in the length direction. The first end 18C of the brush plate assembly 18 is connected to the other end of the brush handle 11. The length direction is the same as the length direction of the brush handle 11. The brush plate assembly 18 includes a brush plate 12 and a bristle assembly 13.

[0124] Furthermore, the brush plate assembly 18 has opposing first surfaces 18a and second surfaces 18b. The first surface 18a is the back surface of the brush plate assembly 18, and the second surface 18b has a bristle-planting area 180, where bristles 14 are disposed. It is understood that the bristle-planting area 180 may include a first bristle-planting area 1311 and a second bristle-planting area 1321. The first bristle-planting area 1311 is formed on a first bristle-planting plate 131, and the second bristle-planting area 1321 is formed on a second bristle-planting plate 132. Both the first bristle-planting plate 131 and the second bristle-planting plate 132 are connected to the brush plate 12. Further details are omitted here.

[0125] The brush assembly 18 includes a joint 181, a transition portion 182, and a first clearance portion 183 along its length. The joint 181 is connected to the brush handle 11, and the transition portion 182 is located between the joint 181 and the first clearance portion 183. The point of maximum thickness of the brush assembly 10 along its thickness direction is located at the transition portion 182. The length of the first clearance portion 183 along the length direction of the brush handle 11 is greater than half the length from the second end 18d of the brush assembly 18 to the end of the bristle-planting area 180 near the brush handle 11, and the thickness of the first clearance portion 183 decreases towards the side away from the brush handle 11.

[0126] As shown in Figures 2, 9 and 10, the point with the maximum thickness of the brush plate assembly 10 along the thickness direction is point A, which is located at the transition part 182. The length of the first clearance part 183 along the length direction of the brush handle 11 is L1. The length from the second end 18d of the brush plate assembly 18 to the end of the bristle-planting area 180 near the brush handle 11 is L, where L1 > 1 / 2 * L. Furthermore, the thickness H of the first clearance part 183 decreases towards the side away from the brush handle 11.

[0127] Due to the different structures of the brush head 10, the bristle planting area of ​​the brush head 10 is also set differently. It can be understood that when the brush head 10 includes a back plate 124a and a bristle planting plate 123, and the bristle planting plate 123 protrudes from the back plate 124a, as shown in Figure 13, the bristle planting area 180 of the brush head 10 is the middle area between the two ends of the bristle planting plate 123 along the length direction of the brush handle 11. When the brush head 10 includes a back plate 124a and a bristle planting plate 123, and the bristle planting plate 123 and the back plate 124a are separately arranged, the bristle planting area 180 of the brush head 10 is the middle area between the two ends of the bristle planting plate 123 along the length direction of the brush handle 11. When the brush head 10 only includes the bristle planting plate 123, the bristle planting area 180 of the brush head 10 is the middle area between the furthest bristle planting holes at both ends of the bristle planting plate 123 along the length direction of the brush handle 11.

[0128] That is, in this embodiment, the back of the brush plate assembly 18 is arc-shaped, which makes it easier for the brush head 10 to enter the oral cavity during use. The adapter 182, where the thickness point A is the largest, is located at the end of the brush head 10 near the handle 11. Therefore, when using the brush head 10 to clean the mouth (such as cleaning wisdom teeth or teeth adjacent to wisdom teeth), at least a portion of the adapter 182 and the joint 181 of the brush head 10 are in contact with the oral cavity, while the first avoidance part 183 has less or no contact with the oral cavity. This allows the brush head 10 to enter the oral cavity more smoothly through the first avoidance part 183, and also effectively reduces the contact area between the back of the brush head 10 and the oral cavity after the brush head 10 enters the oral cavity. Ultimately, this can effectively reduce the attenuation of the motor driving force and improve the oral cleaning effect.

[0129] In some embodiments, the distance L2 between the projection point C of the bristle-planting area 180 at the point of maximum thickness A and the second end 18d of the brush plate assembly 18 is greater than half the length L from the second end 18d of the brush plate assembly 18 to the end of the bristle-planting area near the brush handle 11, i.e., L2 > 1 / 2 * L. In other words, the point of maximum thickness of the brush head 10 is set on the side near the brush handle 11, which can effectively reduce the contact area between the back of the brush head 10 and the oral cavity, and ultimately effectively reduce the attenuation of the motor driving force and improve the oral cleaning effect.

[0130] In some embodiments, the change in thickness of the adapter 182 in the brush assembly 18 is less than 0.5 mm, that is, the height change between the highest and lowest points of the adapter 182 is less than 0.5 mm, which means that the height change of the adapter 182 is relatively gentle and is less likely to cause oral discomfort during contact with the oral cavity.

[0131] As shown in Figures 2 and 9, in some embodiments, the outer surface of the first clearance portion 122 on the side away from the bristle area 180 includes at least a partial arcuate surface, and the arcuate surface has one and only one arcuate bend in both the length and thickness directions. The thickness direction is perpendicular to the length direction. That is, the outer surface of the first clearance portion 122 is smoothly arcuate to improve the comfort of the brush head 10 in the mouth.

[0132] As shown in Figure 9, in some embodiments, the distance D1 between the first surface 18a at the end point of the second end 18d of the brush assembly 18 and the second surface 18b is less than 4 mm. This arrangement makes the front end of the first clearance portion 122 thinner, facilitating the entry of the brush head 10 into the oral cavity. For example, D1 can be 3 mm, 3.5 mm, 2 mm, etc., and is not limited here.

[0133] As shown in Figure 9, in some embodiments, the distance between the projection point of the point with the maximum thickness A in the hair-planting area 180 and the second end of the brush plate assembly 18 is greater than 12mm, that is, L3 > 12mm, such as L3 being 12.5mm, 13mm, 14mm, etc., which is not limited here.

[0134] By setting the distance between the projection point of the maximum thickness point A within the bristle area 180 and the second end of the brush plate assembly 18 within a reasonable range, the contact area between the back of the brush head 10 and the oral cavity is effectively reduced during oral cleaning. On the one hand, this reduces the power attenuation of the brush head 10 when it contacts the oral cavity, thus improving the cleaning power of the brush head. On the other hand, it reduces friction on the user's oral cavity, avoiding discomfort when brushing teeth.

[0135] As shown in Figure 9, in some embodiments, the maximum thickness of the first surface 18a and the second surface 18b in the thickness direction is greater than 4 mm and less than 8 mm. That is, at point A, the thickness D2 between the first surface 18a and the second surface 18b of the brush assembly 18 is greater than 4 mm and less than 8 mm. For example, D2 can be 4.5 mm, 5 mm, 5.3 mm, 6 mm, etc., and is not limited here.

[0136] By setting the maximum thickness of the first surface 18a and the second surface 18b within a reasonable range in the thickness direction, the contact area between the back of the brush head 10 and the oral cavity is effectively reduced during oral cleaning. This effectively reduces the attenuation of the motor drive force and improves the oral cleaning effect. Simultaneously, reducing the contact area with the oral cavity reduces wear and tear on the oral cavity caused by brush head vibration.

[0137] As shown in Figures 2 and 9, in some embodiments, the thickness of the brush assembly 18 along the thickness direction first increases and then decreases from the second end 18d of the brush assembly 18 to the first end 18C of the brush assembly 18. That is, the distance from the first surface 18a to the second surface 18b along the thickness direction first increases and then decreases from the second end 18d of the brush assembly 18 to the first end 18C of the brush assembly 18.

[0138] For example, the first surface 18a and the second surface 18b have a thickness variation in the length direction. From the second end of the brush plate assembly 18 to the first end of the brush plate assembly 18, the distance between the first surface 18a and the second surface 18b first increases and then decreases. The point where the thickness of the first surface 18a and the second surface 18b is the maximum in the thickness direction is point A. The distance between the projection point of point A in the bristle-planting area 180 and the second end of the brush plate assembly 18 is greater than half the length from the second end 18d of the brush plate assembly 18 to the end of the bristle-planting area 180 near the brush handle 11.

[0139] That is, within the interval from the second end of the brush assembly 18 to the point of maximum thickness A, the thickness of the first surface 18a and the second surface 18b gradually increases in the thickness direction. Therefore, the interval from the second end of the brush assembly 18 to the point of maximum thickness A is the interval of gradually increasing thickness.

[0140] Within the interval from the point of maximum thickness A to the first end of the brush assembly 18, the thickness of the first surface 18a and the second surface 18b gradually decreases in the thickness direction. Therefore, the interval from the point of maximum thickness A to the first end of the brush assembly 18, the interval where the thickness gradually decreases, is the thickness decreasing interval.

[0141] That is, the point of maximum thickness of the first surface 18a and the second surface 18b of the brush assembly 18 in the thickness direction is located near the brush handle 11.

[0142] In this embodiment, the back of the brush plate assembly 18 is arc-shaped, which makes it easier for the brush head 10 to be inserted into the oral cavity during use.

[0143] Furthermore, the curvature of the back of the brush plate assembly 18 is designed to first rise and then fall. That is, the thickness of the two opposing first surfaces 18a and second surfaces 18b of the brush plate assembly 18 in the extension direction of the brush handle 11 first increases and then decreases from the top of the brush head 10 to the end where the brush plate assembly 18 is connected to the brush handle 11. The projection point of the maximum thickness is located on the side of the bristle area 180 near the brush handle 11. Thus, when using the brush head 10 for oral cleaning (such as cleaning wisdom teeth or adjacent teeth in the mouth), the end of the highest point of the back of the brush head 10 near the brush handle 11 contacts the mouth, while the end of the highest point of the back of the brush head 10 away from the brush handle 11 has less or no contact with the mouth. This can effectively reduce the contact area between the back of the brush head 10 and the mouth, and ultimately effectively reduce the attenuation of the motor driving force and improve the oral cleaning effect.

[0144] In some embodiments, the line connecting the first surface 18a from the second end 18d of the brush assembly 18 to the point of maximum thickness has a first slope. The line connecting the first surface 18a from the point of maximum thickness to the end of the brush assembly 18 near the brush handle 11 has a second slope, and the absolute value of the first slope is greater than the absolute value of the second slope.

[0145] Optionally, in the range of increased thickness, the back of the brush assembly 18 has an arc-shaped protrusion.

[0146] As shown in Figure 9, the line connecting the first surface 18a of the brush assembly 18 from the second end 18d of the brush assembly 18 to the point of maximum thickness has a first slope K1. The line connecting the first surface 18a of the brush assembly 18 from the point of maximum thickness to the end of the brush assembly 18 near the brush handle has a second slope K2, and the absolute value of K1 is greater than the absolute value of K2.

[0147] That is, the back of the brush plate assembly 18 is designed with a structure that rises first and then falls, and the slope K1 of the arc corresponding to the increase in thickness is greater than the slope K2 of the arc corresponding to the decrease in thickness. Therefore, when using the brush head 10 to clean the mouth (such as cleaning wisdom teeth or teeth adjacent to wisdom teeth), because the slope of the first half of the increased thickness area is larger, the end of the back of the brush head 10 that is far away from the handle 11 has less or no contact with the mouth. This effectively reduces the contact area between the back of the brush head 10 and the mouth. On the one hand, it can reduce the power attenuation of the brush head 10 when it contacts the mouth and improve the cleaning power of the brush head. On the other hand, it can reduce friction on the user's mouth and avoid discomfort when brushing teeth.

[0148] Furthermore, since the back of the brush plate assembly 18 protrudes in an arc shape in the thickness range, it avoids excessive changes in the height of the brush head 10, which could cause obvious height abrupt changes and irritate the user's mouth.

[0149] As shown in Figures 9 and 11, in some embodiments, the first surface 18a has a first slope K1 when the line connecting the second end 18d of the brush assembly 18 to the point of maximum thickness.

[0150] The first surface 18a has a third slope K3 in the width direction from the point of maximum thickness to the end of either of the two opposite sides, and the absolute value of the third slope K3 is greater than the absolute value of the first slope K1. That is, the thickness change rate of the back side of the brush assembly 18 in the width direction is greater than the thickness change rate of the front end along the length direction.

[0151] During the oscillation of the brush head 10, the highest point of the back of the brush head 10 is likely to come into contact with the oral cavity. The front end of the brush head 10 does not move with the oscillation of the brush head 10, but only rotates around the output shaft of the motor. Therefore, the oscillation of the brush head 10 makes it less likely that the front end of the brush head 10 will come into contact with the oral cavity. However, the two sides of the brush head 10 along the width direction will have a large displacement with the oscillation of the brush head 10, which places greater demands on avoiding the user's oral cavity wall. Therefore, through the above design, the brush head 10 can effectively avoid the user's oral cavity in the width direction, thereby reducing the contact between the brush head 10 and the oral cavity.

[0152] It is understood that the brush plate assembly 18 in the above embodiments can be a rigid brush plate component or a brush plate component with a partially rigid structure and a partially soft structure, and no limitation is made here.

[0153] As shown in Figure 11, in some embodiments, the first surface 18a is recessed on opposite sides in the width direction toward the side closer to the second surface 18b.

[0154] Optionally, the first surface 18a is concave in the width direction on opposite sides toward the second surface 18b.

[0155] Optionally, the first surface 18a has a second width W2 in the vertical length direction, the hair-planting area 180 has a first width W1, and W2 < 1 / 2 * W1.

[0156] As shown in Figure 11, the back of the brush plate assembly 18 is recessed on both sides of the bristle area 180 in the width direction, which can reduce the protruding area of ​​the back of the brush plate assembly 18 and thus effectively reduce the contact area between the back of the brush head 10 and the user's mouth.

[0157] Furthermore, the brush assembly 18 is recessed downwards, which, compared to a protruding design, better prevents the back of the brush assembly 18 from contacting the user's mouth.

[0158] Furthermore, the width of the back of the brush plate assembly 18 is less than half the width of the bristle implantation area 180, which can reduce the protruding area of ​​the back of the brush plate assembly 18 and effectively reduce the contact area between the back of the brush plate assembly 18 and the oral cavity.

[0159] Referring to Figure 12, in some embodiments, the first surface 18a has a thickness abrupt change point. This thickness abrupt change point is located on the outer surface of the first clearance portion 183 on the side away from the bristle implantation area 180, or it is located on the outer surface of the joint portion 181 on the side away from the bristle implantation area 180. As shown in Figure 12, the outer surface of the first clearance portion 183 on the side away from the bristle implantation area 180 is provided with a thickness abrupt change point X. By providing the thickness abrupt change point X, the contact area between the first surface 18a and the oral cavity can be reduced, thereby reducing the risk of brush head damage.

[0160] Referring to Figure 13, in some embodiments, the brush assembly 18 includes a brush member 184 and a soft plastic member 15, the soft plastic member 15 covering at least a portion of the back and peripheral sides of the brush member 184. A first surface 18a is the back of the soft plastic member 15, and a second surface 18b is the side surface of the brush member 184 away from the back of the soft plastic member 15.

[0161] In this embodiment, a soft rubber part 15 is provided on the brush plate assembly 18, and the soft rubber part 15 is used to cover part of the back and peripheral side of the brush plate component 184, thereby effectively reducing the discomfort caused by the hard contact between the brush head 10 and the oral cavity, and providing a good shock absorption effect for the brush head 10.

[0162] As shown in Figure 13, in some embodiments, the back surface of the brush plate component 184 is arc-shaped, and the thickness of the back surface of the brush plate component 184 and the second surface 18b in the longitudinal direction increases and then decreases from the second end of the brush plate assembly 18 to the first end of the brush plate assembly 18. Similarly, the thickness of the back surface of the soft rubber component 15 and the second surface 18b in the longitudinal direction also increases and then decreases from the second end of the brush plate assembly 18 to the first end of the brush plate assembly 18. The point B where the thickness of the back surface of the brush plate component 184 and the second surface 18b in the longitudinal direction is the maximum point B between the point A where the thickness of the back surface of the soft rubber component 15 and the second surface 18b in the longitudinal direction is the maximum point A between the back surface of the soft rubber component 15 and the second surface 18b in the longitudinal direction and the first end of the brush plate assembly 18.

[0163] That is, the point B of maximum thickness in the longitudinal direction between the back of the brush plate component 184 and the second surface 18b is closer to the brush handle 11 than the point A of maximum thickness in the longitudinal direction between the back of the soft rubber component 15 and the second surface 18b, so that the brush plate component 184 can provide good support for the position of the soft rubber component 15 in the mouth.

[0164] Optionally, the back of the soft rubber part 15 corresponding to the thickness increase range from the second end of the brush plate assembly 18 to the point of maximum thickness has a first average thickness, and the back of the soft rubber part 15 corresponding to the thickness decrease range from the point of maximum thickness to the first end of the brush plate assembly 18 has a second average thickness, with the first average thickness being greater than the second average thickness. That is, the average thickness of the back of the soft rubber part 15 at the end away from the brush handle 11 is greater than the average thickness of the back of the soft rubber part 15 at the end closer to the brush handle 11. Since the front end of the brush head 10, farther from the brush handle 11, is more likely to touch the teeth than the rear end, increasing the thickness of the soft rubber part at the front end can effectively alleviate the discomfort caused by teeth hitting.

[0165] As shown in Figure 13, in some embodiments, the brush plate component 184 includes a brush plate 12 and a bristle implantation assembly 13. The brush plate 12 includes a back plate 124a, which includes a support portion 121 and a connecting portion 122. The support portion 121 is connected to the brush handle 11, and the back of the support portion 121 is arc-shaped. The bristle implantation plate 123 forms a bristle implantation area 180 on the side away from the back plate 124a.

[0166] The connecting portion 122 connects the support portion 121 and the bristle board 123, and a gap 17 exists between the connecting portion 122 and the support portion 121. The soft rubber part 15 covers a portion of the back side of the support portion 121 and a portion of the peripheral side of the bristle board 123, and fills at least part of the gap 17. The surface of the bristle board 123 away from the support portion 121 is the second surface 18b of the back plate 124a component 12. When the bristles 14 are subjected to external force, at least a portion of the connecting portion 122 can deform and swing relative to the support portion 121 on opposite sides in the longitudinal direction, and / or swing in a direction perpendicular to the second surface 18b.

[0167] It is understood that the back plate 124a and the flocking plate 123 can be molded separately and connected by means of ultrasound, adhesive, heat fusion, etc. Alternatively, the back plate 124a and the flocking plate 123 can be molded as a single piece; no limitation is made here.

[0168] When the back plate 124a and the tufting plate 123 are integrally formed, it can be understood that the brush plate component 184 is provided with a tufting hole area to form a tufting area 180.

[0169] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the scope of the technology disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application.

Claims

1. A brush head, wherein, include: A brush handle, the brush handle including opposing first and second ends, the first end of the brush handle being configured to be detachably connected to the main unit of an oral care device; A brush plate, the brush plate including a support part and a connecting part, the support part being connected to the second end of the brush handle, and the connecting part being connected to the support part; A hair-planting assembly, comprising at least a first hair-planting plate having a first hair-planting area and a second hair-planting plate having a second hair-planting area, wherein the first hair-planting plate is connected to the support portion via the connecting portion, and the second hair-planting plate is disposed at one end of the first hair-planting plate and connected to the support portion, wherein a gap is formed between the first hair-planting plate and the second hair-planting plate, and / or a gap is formed between the first hair-planting plate and the support portion; The bristles, at least some of which are disposed in the first bristle planting area and the second bristle planting area, and the connecting portion can deform to change the relative position of the first bristle planting plate and the second bristle planting plate when the bristles located in the first bristle planting area are subjected to force. A soft rubber component that covers at least a portion of the back and peripheral sides of the brush plate and fills at least a portion of the gaps.

2. The brush head according to claim 1, wherein, The connecting part is strip-shaped, wherein the length of the connecting part along the length direction is greater than the width along the width direction; or, the width of the connecting part along the width direction is greater than the length along the length direction.

3. The brush head according to claim 1, wherein, The cross-sectional area of ​​the connecting part gradually decreases from the connection end with the supporting part toward the connection end with the first flocking plate. Alternatively, the cross-sectional area of ​​the connecting portion gradually increases from the connection end with the support portion toward the connection end with the first flocking plate; Alternatively, the cross-sectional area of ​​the connecting portion is the same from the connecting end with the supporting portion toward the connecting end with the first flocking plate. Alternatively, the cross-sectional area of ​​the connecting portion decreases and then increases from the connection end with the support portion toward the connection end with the first flocking plate.

4. The brush head according to claim 1, wherein, When the bristles in the first bristle-planting area are subjected to force, the first bristle-planting plate can at least sway relative to the support in a first direction and a second direction, where the first direction is the extension direction of the brush handle and the second direction is set at an angle to the first direction.

5. The brush head according to claim 4, wherein, The support includes a first section, the projection of which on the brush plate is located in the gap between the first and second tufting plates, and the cross-section of which on the plane formed by the second and third directions is elongated or rectangular, wherein the third direction is perpendicular to the extension direction of the brush handle.

6. The brush head according to claim 1, wherein, The projection of the connecting portion along the first direction onto the first flocking plate is located in the middle region of the first flocking plate. Alternatively, the projection of the connecting portion onto the first bristle board along the first direction is located at one side edge of the first bristle board, where the first direction is the extending direction of the brush handle. Alternatively, one end of the connecting portion is connected to the middle area of ​​the first flocking plate; Alternatively, one end of the connecting portion is connected to one side edge of the first flocking plate.

7. The brush head according to claim 1, wherein, The support portion has a first support projection on the first flocking plate, and the width of the first support projection in the third direction is smaller than the width of the first flocking plate.

8. The brush head according to claim 1, wherein, The second tufting plate is disposed at the end of the first tufting plate away from the brush handle, and a gap is formed between the second tufting plate and the first tufting plate.

9. The brush head according to claim 8, wherein, The second flocking plate is rigidly connected to the support portion.

10. The brush head according to claim 1, wherein, The sidewall of the second hair-planting plate protrudes from the side of the first hair-planting plate, while the sidewall of the first hair-planting plate is recessed from the side of the second hair-planting plate; or, the sidewall of the second hair-planting plate is recessed from the side of the first hair-planting plate, while the sidewall of the first hair-planting plate protrudes from the side of the second hair-planting plate.

11. The brush head according to claim 1, wherein, At least when the bristles in the second bristle-planting area are under force, the second bristle-planting plate can tilt and sway at least in a second direction, which is a direction perpendicular to the extension direction of the brush handle.

12. The brush head according to claim 11, wherein, The support portion connected to the second flocking plate is an arc-shaped structure that protrudes away from the first flocking plate.

13. The brush head according to claim 1, wherein, The projection of the support portion onto the second tufting plate along the first direction is located in the middle region of the second tufting plate, or the projection of the support portion onto the second tufting plate along the first direction is located on one side edge of the second tufting plate, where the first direction is the extension direction of the brush handle.

14. The brush head according to claim 1, wherein, The brush head also includes a third bristle-planting plate, which is disposed at the end of the first bristle-planting plate near the brush handle and connected to the support portion.

15. The brush head according to claim 14, wherein, The third flocking plate is rigidly connected to the support portion.

16. The brush head according to claim 14, wherein, The sidewall of the third hair-planting plate protrudes from the side of the first hair-planting plate, and the sidewall of the first hair-planting plate is recessed from the side of the third hair-planting plate; or, the sidewall of the third hair-planting plate is recessed from the side of the first hair-planting plate, and the sidewall of the first hair-planting plate protrudes from the side of the third hair-planting plate.

17. The brush head according to claim 15, wherein, The support includes a second section, the projection of which on the brush plate is located in the gap between the second and third tufting plates, and the cross-section of which on the plane formed by the second and third directions is elongated or rectangular, the first direction being the extension direction of the brush handle, the second direction being at an angle to the first direction, and the third direction being perpendicular to the first direction.

18. The brush head according to claim 1, wherein, The brush head includes a brush plate assembly, which includes a brush plate and the bristle assembly. The brush plate assembly has a first surface and a second surface facing each other. The first surface is the back surface of the brush plate assembly. The second surface has a bristle-planting area, which includes the first bristle-planting area and the second bristle-planting area. The brush plate assembly has a first end and a second end facing each other along the length direction of the brush handle. The brush plate assembly includes a joint, a transition portion, and a first clearance portion along its length. The joint is connected to the brush handle, and the transition portion is located between the joint and the first clearance portion. The point of maximum thickness of the brush plate assembly along its thickness direction is located at the transition portion. The length of the first clearance portion along the length direction of the brush handle is greater than half the length from the second end of the brush plate assembly to the end of the bristle-planting area near the brush handle, and the thickness of the first clearance portion decreases towards the side away from the brush handle.

19. The brush head according to claim 18, wherein, The distance between the projection point of the point of maximum thickness in the hair-planting area and the second end of the brush plate assembly is greater than half the length from the second end of the brush plate assembly to the end of the hair-planting area near the brush handle.

20. The brush head according to claim 18, wherein, The change in thickness of the adapter in the brush assembly is less than 0.5 mm.

21. The brush head according to claim 18, wherein, The outer surface of the first clearance portion on the side away from the hair-planting area includes at least a partial arcuate surface, and the arcuate surface has one and only one arcuate bend in the length and thickness directions.

22. The brush head according to claim 18, wherein, The first surface has a thickness abrupt change point; wherein, the thickness abrupt change point is located on the outer surface of the first clearance portion away from the hair-planting area, or, the thickness abrupt change point is located on the outer surface of the joint portion away from the hair-planting area.

23. The brush head according to claim 18, wherein, The distance between the first surface and the second surface at the end point of the second end of the brush assembly is less than 4 mm; And / or, the distance between the projection point of the point of maximum thickness in the hair-planting area and the second end of the brush plate assembly is greater than 12mm; And / or, the maximum thickness between the first surface and the second surface is greater than 4 mm and less than 8 mm.

24. The brush head according to claim 18, wherein, The thickness of the brush assembly along the thickness direction increases and then decreases from the second end of the brush assembly to the first end of the brush assembly.

25. The brush head according to claim 24, wherein, The line connecting the first surface from the second end of the brush assembly to the point of maximum thickness has a first slope; The line connecting the first surface from the point of maximum thickness to the end of the brush assembly near the brush handle has a second slope, and the absolute value of the first slope is greater than the absolute value of the second slope.

26. The brush head according to claim 18, wherein, The brush assembly further includes a second clearance portion, which is disposed on opposite sides of the adapter portion along the width direction.

27. The brush head according to claim 26, wherein, The second clearance portion is recessed towards the side closer to the second surface.

28. The brush head according to claim 18, wherein, At the point of maximum thickness, the first surface has a second width W2 in the width direction of the brush assembly, the bristle-planting area has a first width W1, and W2 < 1 / 2 * W1.

29. The brush head according to claim 18, wherein, The brush assembly further includes a brush component and the soft rubber component, wherein the soft rubber component covers at least a portion of the back and peripheral sides of the brush component; The first surface is the back side of the soft rubber part, and the second surface is the side surface of the brush plate component away from the back side of the soft rubber part.

30. The brush head according to claim 29, wherein, The back of the brush plate component is arc-shaped, and the thickness between the back of the brush plate component and the second surface in the thickness direction increases and then decreases from the second end of the brush plate assembly to the first end of the brush plate assembly. Furthermore, the thickness of the back side of the soft rubber part and the second surface in the thickness direction increases and then decreases from the second end of the brush assembly to the first end of the brush assembly. The point of maximum thickness between the back surface of the brush plate component and the second surface in the thickness direction is located between the point of maximum thickness between the back surface of the soft rubber component and the second surface in the thickness direction and the first end of the brush plate assembly.

31. The brush head according to claim 30, wherein, The back of the soft rubber component corresponding to the thickness increase interval from the second end of the brush plate assembly to the maximum thickness point has a first average thickness, and the back of the soft rubber component corresponding to the thickness decrease interval from the maximum thickness point to the first end of the brush plate assembly has a second average thickness, wherein the first average thickness is greater than the second average thickness.

32. An oral care device, wherein, It includes a main unit and a brush head as described in claim 1, wherein the brush head is detachably connected to the main unit.

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