Brush head and electric toothbrush

Abstract

The embodiment of the utility model discloses a brush head and an electric toothbrush. The brush head comprises a brush rod, a brush head main body part and a soft rubber piece at least wrapping the back face and the side face of the brush head main body part. The brush head main body part comprises a back plate and a bristle planting plate, the bristle planting plate and the back plate are arranged in a split mode in the thickness direction of the bristle planting plate, one of the bristle planting plate and the back plate is connected with one end of the brush rod, and bristles are planted on the bristle planting plate; wherein the soft rubber piece wraps the back face and the peripheral side face of the back plate, and the soft rubber piece further wraps at least part of the peripheral side face of the bristle planting plate so as to fix the bristle planting plate and the back plate. According to the brush head and the electric toothbrush provided by the embodiment of the invention, the soft rubber piece not only can improve the connection stability between the back plate and the bristle planting plate, but also can achieve a better cushioning effect in a tooth brushing process.

Description

Technical Field

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

[0002] The brush head includes a brush handle and a main body. The main body typically includes a bristle-forming plate and a back plate, which are usually connected and fixed together by welding. The connection between the back plate and the bristle-forming plate, formed by ultrasonic welding, usually consists of several weld points. The limited number of connection points between the back plate and the bristle-forming plate leads to an unstable connection. Utility Model Content

[0003] This application provides a brush head designed to improve the connection stability between the back plate and the flocking plate.

[0004] A first aspect of this application provides a brush head, the brush head comprising:

[0005] brush handle;

[0006] The main body of the brush head; and,

[0007] At least a soft rubber part covering the back and sides of the brush head body;

[0008] The brush head body includes:

[0009] Back panel; and,

[0010] A bristle-planting plate is separately disposed from the back plate along its thickness direction. One of the bristle-planting plate and the back plate is connected to one end of the brush rod. Bristles are planted on the bristle-planting plate.

[0011] The soft rubber component covers the back and peripheral sides of the back plate, and also covers at least a portion of the peripheral sides of the flocking board to fix the flocking board and the back plate.

[0012] The brush head in this application has at least the following technical effects:

[0013] Firstly, regarding the connection stability between the back panel and the flocking board, because the soft rubber component covers the back and sides of the back panel, the contact area between the soft rubber component and the back panel is large, making the connection between the back panel and the soft rubber component more stable. Furthermore, since the soft rubber component also covers the peripheral side of the flocking board, the contact area between the soft rubber component and the peripheral side is also large. Therefore, the peripheral side of the flocking board and the soft rubber component mutually restrain each other, preventing the soft rubber component from loosening and detaching from the flocking board in any direction within the plane of the flocked surface, thus making the connection between the flocking board and the soft rubber component even more stable. Therefore, a stable connection between the back panel and the flocking board can be achieved through the soft rubber component.

[0014] Furthermore, the soft rubber parts can be injection molded onto the backplate and the tufting plate to cover them, resulting in a stronger bond between the soft rubber parts and the backplate and tufting plate. Therefore, the soft rubber parts have better connection stability with the backplate and tufting plate, and even after prolonged use in high-frequency vibration environments, they are less likely to detach from the tufting plate, preventing the backplate and tufting plate from separating.

[0015] Secondly, the soft rubber parts cover the sides and back of the back panel and the periphery of the bristle board. The soft rubber parts can cover the contact area between the back panel and the bristle board, so that water stains and cleaning liquids cannot enter the gaps in the contact area, thus improving the cleanliness of the brush head.

[0016] Third, regarding the cushioning effect, because the brush head covers the back and sides of the back plate, and the soft rubber parts cover the periphery of the bristle plate, the back of the brush head contacts the user's mouth through the soft rubber parts, and the periphery of the brush head contacts the user's mouth through the soft rubber parts, while the front of the brush head contacts the user's mouth through the bristles. In summary, apart from the bristles contacting the user's mouth, the bristle plate and back plate hardly contact the user's mouth. The brush head, except for the front side where the bristles are located, almost entirely contacts the user's mouth through the soft rubber parts. Because the soft rubber parts are relatively soft and easily undergo elastic deformation, they provide good cushioning, reducing damage to the oral cavity, especially sensitive teeth or sensitive gums, and effectively protecting the user's oral cavity.

[0017] As one embodiment of this application, the soft rubber component covers the contact area between the back plate and the flocking plate. The brush head in this application prevents water stains and cleaning solutions from entering the gaps within the contact area, thus improving the cleanliness of the brush head.

[0018] As one embodiment of this application, the back plate has a positioning groove on the side facing the bristles;

[0019] The flocking plate has an annular protrusion;

[0020] The flocking board is placed in the positioning groove, the annular protrusion is located outside the positioning groove and abuts against the back plate, the abutment position of the annular protrusion and the back plate constitutes the abutment area, and the annular protrusion is covered by the soft rubber part.

[0021] The brush head in this application has a positioning groove on the side of the back plate facing the tufting plate. The tufting plate extends into the positioning groove to engage with it, thus positioning and limiting the tufting plate and the back plate. The contact area between the annular protrusion and the back plate forms an abutment area. This prevents the tufting plate from moving further towards the back plate in the thickness direction, resulting in better positioning and limiting between the tufting plate and the back plate. This facilitates the wrapping of the soft rubber part around the back plate and the tufting plate, and reduces the risk of misalignment caused by displacement of the back plate and the tufting plate during the wrapping process. Ultimately, this allows for accurate assembly of the soft rubber part, the back plate, and the tufting plate, improving product yield.

[0022] As one embodiment of this application, the peripheral side surface of the annular protrusion is aligned with the peripheral side surface of the back plate along the thickness direction of the flocking plate.

[0023] The brush head in this application ensures that the soft rubber part fits tightly against the outer surface of the annular protrusion and the side of the back plate, thus preventing gaps between the soft rubber part and the annular protrusion or back plate due to the height difference between them, and thus preventing dirt and grime from accumulating in the gaps.

[0024] As one embodiment of this application, the flocking board includes:

[0025] The bristle-implanting main board has a bristle-implanting surface and a back surface arranged opposite to each other. The bristle-implanting surface has multiple bristle-implanting holes, and the roots of multiple clumps of bristles are correspondingly implanted into the multiple bristle-implanting holes; and

[0026] An annular protrusion is provided in a ring shape on the peripheral side of the tufting motherboard. The annular protrusion is lower than the tufting surface, and the soft rubber part covers the surface of the annular protrusion that is close to the tufting surface.

[0027] The brush head in this application can, on the one hand, increase the contact area between the soft rubber part and the tufting plate, thereby improving the connection stability between the soft rubber part and the tufting plate; on the other hand, the soft rubber part is partially snapped into the step surface of the second step structure formed by the annular protrusion and the tufting surface, which can reduce the probability of the soft rubber part detaching from the tufting plate.

[0028] As one embodiment of this application, the soft rubber part is flush with the flocked surface.

[0029] The brush head in this application has no stepped structure between the stepped covering part and the bristle surface, which avoids dirt accumulation and makes the brush head more aesthetically pleasing.

[0030] As one embodiment of this application, the soft rubber part includes:

[0031] Back panel covering portion, covering the back panel; and

[0032] The flocking board covering part is connected to the back plate covering part and covers the peripheral side of the flocking board;

[0033] The thickness of the back panel covering part is greater than the thickness of the flocking board covering part.

[0034] In this application, the brush head with the back plate covering part has a higher probability and more frequent contact with the user's oral cavity wall compared to the bristle plate covering part. By setting the thickness of the back plate covering part to be greater than that of the bristle plate covering part, the back plate covering part has a better shock absorption effect, thereby making the brush head as a whole have a better shock absorption effect.

[0035] As one embodiment of this application, the brush rod includes:

[0036] Main body paragraphs; and

[0037] A neck segment, connecting the main body segment to the back plate or the flocking plate, wherein the diameter of the neck segment is smaller than the diameter of the main body segment;

[0038] The soft rubber component also includes:

[0039] The neck covering is connected to both the back plate covering and the flocking plate covering, and covers the neck segment;

[0040] The thickness of the flocking plate covering part is greater than the thickness of the neck covering part.

[0041] In this application, the brush head can have a larger diameter in the neck section while ensuring that the outer surface of the neck covering part is flush with the outer surface of the main body section. This results in higher structural strength in the neck section and reduces the risk of the brush head breaking in the neck section.

[0042] As one embodiment of this application, the hardness of the soft rubber part is not less than 40 Shore hardness and not greater than 50 Shore hardness; and / or,

[0043] The thickness of the soft rubber part is not less than 0.4 mm and not more than 1 mm.

[0044] The brush head in this application has a soft rubber component with a hardness of not less than 40 Shore A and not more than 50 Shore A. This ensures that the soft rubber component possesses suitable structural strength and elasticity, preventing it from being too hard and affecting brushing comfort, or too soft and failing to stably securely fix the bristle board and back plate. The thickness of the soft rubber component is not less than 0.4 mm and not more than 1 mm. This combination provides the soft rubber component with suitable structural strength and elasticity while maintaining a reasonable material cost.

[0045] As an embodiment of this application, a first guide portion is provided at the back plate or at the connection between the back plate and the brush rod. The first guide portion is used to guide the tufting plate to a predetermined position on the back plate during the assembly process of the tufting plate and the back plate.

[0046] The brush head in this application can guide the tufting plate to the back plate during the assembly process of the tufting plate and the back plate through the first guide part, so that the tufting plate moves to the predetermined position with the back plate. In this way, the assembly speed of the tufting plate and the back plate is faster and the assembly accuracy is higher, thereby improving the assembly efficiency.

[0047] As one embodiment of this application, the first guide portion includes a first guide ramp.

[0048] The brush head in this application uses a first guide slope as the first guide portion. On the one hand, this makes the structure of the first guide portion simple and easy to manufacture. On the other hand, during the assembly of the tufting plate onto the back plate, the tufting plate and the first guide slope slide against each other to guide the tufting plate to the back plate. In this way, the tufting plate and the first guide slope only need to be roughly aligned to slide against each other, without the need for strict alignment for positioning, making the assembly process of the tufting plate and the back plate faster and more efficient.

[0049] As one embodiment of this application, the height of the first guide ramp relative to the back plate gradually decreases from the direction in which the brush rod points towards the back plate; and / or

[0050] The width of the first guide ramp gradually increases from the direction in which the brush rod points toward the back plate.

[0051] In this application's brush head, the height of the first guide slope relative to the back plate gradually decreases. This allows the tufting plate to be guided to a predetermined position on the back plate by the gradually decreasing height of the first guide slope when it slides against the second guide slope. This results in higher assembly efficiency between the tufting plate and the back plate. The width of the first guide slope gradually increases. Thus, when the first guide slope is located at the connection between the back plate and the brush rod, the gradually increasing width of the first guide slope strengthens the structural strength of the connection between the back plate and the brush rod, reducing the risk of brush head breakage at this connection point.

[0052] As an embodiment of this application, the tufting plate has a second guide portion at one end near the brush rod, and the first guide portion and the second guide portion are guided and cooperated.

[0053] The brush head in this application requires the tufting plate to be assembled onto the back plate. Through the guiding cooperation of the first guide part and the second guide part, the tufting plate can be guided to the back plate during the assembly process, so that the tufting plate moves to the predetermined position with the back plate. In this way, the assembly speed of the tufting plate and the back plate is faster and the assembly accuracy is higher, thereby improving the assembly efficiency.

[0054] As an embodiment of this application, the first guide portion includes a first guide ramp; the second guide portion includes a second guide ramp, and the first guide ramp abuts against the second guide ramp.

[0055] The brush head in this application uses a second guide section as a second guide slope. On the one hand, this makes the structure of the second guide section simple and easy to manufacture. On the other hand, during the assembly of the tufting plate onto the back plate, the second guide slope slides against the first guide slope to guide the tufting plate to the back plate. In this way, the second guide slope and the first guide slope only need to be roughly aligned to slide against each other, without the need for strict alignment for positioning, making the assembly process of the tufting plate and the back plate faster and more efficient.

[0056] As one embodiment of this application, the back plate has a positioning groove on the side facing the bristles, and the bristle-planting plate is partially placed in the positioning groove;

[0057] The bottom of the positioning groove has a recess, and the flocking plate has a mating part, which is at least partially placed in the recess.

[0058] In this application, the brush head has at least a portion of its mating part placed in a groove, so that after the mating part extends into the positioning groove, it further extends into the groove, making the mating part and the back plate more stably mated, so as to more stably achieve mutual limiting and positioning between the back plate and the tufting plate.

[0059] As one embodiment of this application, the groove is an annular groove, and the mating part is an annular mating part.

[0060] In this application, the brush head's annular mating part can engage with the annular groove in any direction perpendicular to the thickness direction of the tufting plate, further improving the limiting and positioning stability between the back plate and the tufting plate.

[0061] As one embodiment of this application, the flocking plate is generally elliptical; and / or,

[0062] The bristle-planting plate has a bristle-planting surface with multiple bristle-planting holes. The roots of multiple clusters of bristles are correspondingly planted in the multiple bristle-planting holes. The bristle-planting holes are at least one of triangular, elongated, circular, and rectangular shapes.

[0063] The brush head in this application has an overall elliptical bristle plate. This shape matches the elongated, curved arrangement of human teeth, allowing for coverage of more tooth areas and improved brushing efficiency. The bristle holes can be varied in shape, allowing for different cross-sectional bristle shapes, resulting in a wider variety of brush head types and more comprehensive cleaning effects.

[0064] As an embodiment of this application, the bristle-planting plate has a bristle-planting surface with multiple bristle-planting holes. The roots of multiple clumps of bristles are correspondingly planted in the multiple bristle-planting holes. At least two positioning bosses are raised on the bristle-planting surface, and the positioning bosses have positioning holes for positioning the bristle-planting plate.

[0065] In this application, the brush head can position the bristle implantation plate through the positioning holes during the bristle implantation process, so as to place the bristle implantation plate in the required position. Then, the bristle implantation plate is fixed by the clamp, and the bristles are implanted into the bristle implantation holes. In this way, the bristle implantation efficiency is higher.

[0066] As one embodiment of this application, the bristles include:

[0067] Multiple inner ring bristle tufts; and

[0068] Multiple outer ring bristle clusters, the multiple outer ring bristle clusters are arranged in a ring at intervals on the outer periphery of the whole formed by the multiple inner ring bristle clusters;

[0069] The positioning boss is located inside the annular area formed by the outer bristle clusters.

[0070] The brush head in this application improves the overall aesthetics by at least partially covering the positioning protrusions with the outer ring of bristles.

[0071] As one embodiment of this application, the bristles are embedded in the positioning hole.

[0072] The brush head in this application, given a fixed area of ​​the bristle implantation plate, can further increase the bristle density of the implantation plate, improve the precision of brushing, and thus enhance the brushing effect.

[0073] As an embodiment of this application, the bristle-planting plate has a bristle-planting surface, the bristle-planting surface has multiple bristle-planting holes, and the roots of multiple clusters of bristles are correspondingly planted in the multiple bristle-planting holes.

[0074] The bristles include a first bristle tuft and a second bristle tuft. The bristles of the first bristle tuft are arranged parallel to the central axis of the hair implantation hole, and the bristles of the second bristle tuft are arranged at an angle to the central axis of the hair implantation hole.

[0075] The bristles include:

[0076] A multi-clustered inner ring of bristles, including the first bristle cluster and / or the second bristle cluster; and

[0077] Multiple outer ring bristle clusters, wherein the multiple outer ring bristle clusters are arranged in a ring at intervals on the outer periphery of the entire body formed by the multiple inner ring bristle clusters, and include the first bristle cluster and / or the second bristle cluster.

[0078] The brush heads in this application offer a wider variety of types, allowing users to purchase and use the appropriate brush head based on their oral health condition.

[0079] As one embodiment of this application, the orthographic projection of the top of the second bristle tuft on the bristle-planting surface is greater than the orthographic projection of the root of the second bristle tuft on the bristle-planting surface.

[0080] The brush head in this application allows the second bristle cluster to have a larger coverage area, resulting in a larger contact area between the brush head and the teeth, thereby improving brushing efficiency.

[0081] As one embodiment of this application, the bristles include:

[0082] Multiple inner ring bristle tufts; and

[0083] Multiple outer ring bristle clusters, the multiple outer ring bristle clusters are arranged in a ring at intervals on the outer periphery of the whole formed by the multiple inner ring bristle clusters;

[0084] Wherein, the bristles of the inner ring bristle tuft and the outer ring bristle tuft are both round-headed or pointed-headed bristles; or, the bristles of the inner ring bristle tuft are round-headed bristles and the bristles of the outer ring bristle tuft are pointed-headed bristles; or, the bristles of the inner ring bristle tuft are pointed-headed bristles and the bristles of the outer ring bristle tuft are round-headed bristles.

[0085] The brush head in this application can have various bristle types and various brush head types. Users can purchase and use the corresponding brush head according to their oral condition.

[0086] As one embodiment of this application, it also includes:

[0087] A counterweight is disposed between the back plate and the flocking plate.

[0088] In this application, the counterweight of the brush head is located between the back plate and the bristle board, so that the counterweight is stably fixed inside the brush head. The counterweight can increase the weight of the entire brush head body and play a certain role in shock absorption.

[0089] A second aspect of this application provides an electric toothbrush, the electric toothbrush comprising:

[0090] The brush head as described in any of the preceding claims; and the toothbrush body, wherein the output shaft of the toothbrush body is detachably connected to the brush handle. Attached Figure Description

[0091] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0092] Figure 1 This is a schematic diagram of the structure of an electric toothbrush in one embodiment of this application;

[0093] Figure 2 This is a schematic diagram of the structure of a brush head in one embodiment of this application;

[0094] Figure 3 for Figure 2 The diagram shows the structure of the brush head from another perspective;

[0095] Figure 4 for Figure 2 The diagram shows the exploded structure of the brush head;

[0096] Figure 5 This is a schematic diagram of the exploded structure in another embodiment of this application;

[0097] Figure 6 This is an exploded structural diagram of the tufting plate, back plate, and brush rod in one embodiment of this application;

[0098] Figure 7 This is a schematic diagram of the structure of the flocking board in one embodiment of this application;

[0099] Figure 8 for Figure 7 A schematic diagram of the structure of the flocking board from another perspective;

[0100] Figure 9 for Figure 6 The exploded structural diagram of the brush bar, back plate, and tufting plate from another perspective is shown.

[0101] Figure 10 This is a schematic diagram of the brush rod and back plate in one embodiment of this application;

[0102] Figure 11 This is a schematic diagram of the structure of the soft rubber part in one embodiment of this application;

[0103] Figure 12 This is a schematic diagram of the structure of the brush bristles and the bristle board in one embodiment of this application.

[0104] Reference numerals: 100, Electric toothbrush; 20, Toothbrush body; 21, Brush handle; 22, Circuit board; 23, Battery; 24, Motor; 10, Brush head; 11, Brush handle; 111, Main body section; 112, Neck section; 12, Back plate; 12a, Positioning groove; 12b, Groove; 121, First guide section; 1211, First guide slope; 13, Bristle plate; 131, Second guide section; 1311, Second guide slope; 132, Bristle plate; 132a, Bristle surface; 132b, Back side; 13 2c. Peripheral side; 132d. Hair implantation hole; 133. Annular protrusion; 134. First step structure; 135. Fitting part; 137. Second step structure; 14. Brush bristles; 141. Inner ring bristle tuft; 142. Outer ring bristle tuft; 15. Soft rubber part; 151. Back plate covering part; 152. Hair implantation plate covering part; 1521. Protrusion covering part; 1522. Step covering part; 153. Neck covering part; 16. Positioning boss; 16a. Positioning hole; 17. Counterweight; 18. Brush head body part. Detailed Implementation

[0105] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0106] The brush head includes a brush handle and a brush head body. The brush head body typically includes a bristle-forming plate and a back plate, which are welded together using an ultrasonic process. The connection between the back plate and the bristle-forming plate formed by ultrasonic welding is usually formed by several weld points or a welded strip. The limited number of connection points between the back plate and the bristle-forming plate results in an unstable connection.

[0107] To resolve the above, please refer to Figure 1 This application discloses an electric toothbrush 100, which includes a toothbrush body 20 and a brush head 10 detachably connected to the toothbrush body 20. The toothbrush body 20 includes a handle 21 and components such as a circuit board 22, a battery 23, and a motor 24 disposed within the handle 21. The battery 23 supplies power to the circuit board 22 and the motor 24. Control elements on the circuit board 22 are used to control the operation of the motor 24. The output shaft of the motor 24 extends out of the handle 21 to connect with the brush head 10 and drive the brush head 10 to vibrate, thereby cleaning the user's oral cavity through the vibrating brush head 10.

[0108] The brush head 10 is detachably connected to the output shaft of the motor 24 to facilitate the replacement of brush heads 10 with different models or materials. It is understood that the brush head 10 of this embodiment can also be applied to manual toothbrushes.

[0109] Please see Figure 2-5 As one embodiment of this application, the brush head 10 includes a brush handle 11, a brush head body 18, bristles 14, and a soft rubber part 15. The brush head body 18 includes a back plate 12 and a bristle-forming plate 13.

[0110] Please see Figure 5 The brush handle 11 extends along its axial direction, which is its length direction. One end of the brush handle 11 is detachably connected to the output shaft of the motor 24. In one embodiment of this application, the other end of the brush handle 11 is connected to the back plate 12. In another embodiment of this application, the other end of the brush handle 11 is connected to the tufting plate 13. In yet another embodiment of this application, the other end of the brush handle 11 is connected to both the back plate 12 and the tufting plate 13. The brush handle 11 gives the brush head 10 a certain length so that the brush head 10 can reach various parts of the oral cavity that need to be cleaned.

[0111] Please see Figure 5 As one embodiment of this application, the brush handle 11 includes a main body segment 111 and a neck segment 112. The main body segment 111 is detachably connected to the output shaft of the motor 24. The neck segment 112 connects the main body segment 111 and the back plate 12, and the diameter of the neck segment 112 is smaller than the diameter of the main body segment 111, so that the soft rubber part 15 covers the neck segment 112, and the outer peripheral surface of the soft rubber part 15 covered by the neck segment 112 is aligned with the outer peripheral surface of the connected main body segment 111.

[0112] Please see Figures 5-6 The back plate 12 is generally plate-shaped and is located on the back of the tufting plate 13. As one embodiment of this application, the back plate 12 is connected to one end of the brush handle 11. The back plate 12 is used to support the tufting plate 13, that is, the tufting plate 13 is connected to the brush handle 11 through the back plate 12.

[0113] It should be noted that in this application, the phrase "back plate 12 is generally plate-like" means that the back plate 12, viewed from an overall perspective, is plate-like in structure, or is substantially plate-like in structure. This limitation is used to distinguish it from a plate-like structure in an absolute sense. Based on the description in this application, any modified designs made by those skilled in the art without inventive effort, as long as they satisfy "generally plate-like" or "generally plate-like," should be understood as satisfying this limitation. Descriptions similar to "generally" or "substantially" appearing in other parts of this application are based on the same considerations and should also be understood accordingly; further elaboration will not be repeated in the relevant sections.

[0114] As one embodiment of this application, the back plate 12 and the brush rod 11 can be integrally formed. The back plate 12 can be an extension of the brush rod 11, and therefore, the back plate 12 can also be a part of the structure of the brush rod 11. Integrating the back plate 12 and the brush rod 11 can improve production efficiency and the connection stability between the back plate 12 and the brush rod 11, and the connection between the back plate 12 and the brush rod 11 is not easy to break.

[0115] As another embodiment of this application, the back plate 12 and the brush bar 11 can also be set separately to improve the manufacturing flexibility of the back plate 12 and the brush bar 11.

[0116] As an embodiment of this application, the back plate 12 has a positioning groove 12a on the side facing the flocking plate 13. The flocking plate 13 extends into the positioning groove 12a to be positioned and engaged with the positioning groove 12a, so that the flocking plate 13 and the back plate 12 are mutually positioned and limited.

[0117] Please see Figure 6 As one embodiment of this application, the back plate 12 is provided with a first guide portion 121. Alternatively, the first guide portion 121 may also be located at the connection between the back plate 12 and the brush rod 11, that is, part of the first guide portion 121 is located on the brush rod 11, and the rest is located on the back plate 12. Through the first guide portion 121, the tufting plate 13 can be guided to the back plate 12 during the assembly process of the tufting plate 13 and the back plate 12, that is, the tufting plate 13 moves to the predetermined position with the back plate 12. In this way, the assembly speed of the tufting plate 13 and the back plate 12 is faster, the assembly accuracy is higher, and thus the assembly efficiency is improved.

[0118] Please see Figure 6 As an embodiment of this application, the first guide portion 121 includes a first guide ramp 1211. By setting the first guide portion 121 as a first guide ramp 1211, on the one hand, the structure of the first guide portion 121 is simple and easy to manufacture; on the other hand, during the assembly of the flocking plate 13 onto the back plate 12, the flocking plate 13 and the first guide ramp 1211 slide relative to each other to guide the flocking plate 13 to the back plate 12. In this way, the flocking plate 13 and the first guide ramp 1211 only need to be roughly aligned to slide relative to each other, without the need for strict alignment for positioning, making the assembly process of the flocking plate 13 and the back plate 12 faster and more efficient.

[0119] As an embodiment of this application, from the direction of the brush rod 11 pointing to the back plate 12, the width of the first guide slope 1211 gradually increases. Thus, when the first guide slope 1211 is located at the connection between the back plate 12 and the brush rod 11, by gradually increasing the width of the first guide slope 1211, the structural strength of the connection between the back plate 12 and the brush rod 11 can be strengthened, and the risk of the brush head 10 breaking at the connection between the back plate 12 and the brush rod 11 can be reduced.

[0120] Please refer to the following: Figures 6-8 As an embodiment of this application, the tufting plate 13 has a second guide portion 131 at one end near the brush rod 11, and the positions of the second guide portion 131 and the first guide portion 121 are correspondingly arranged in the thickness direction of the tufting plate 13.

[0121] During the assembly of the brush head 10, the bristle plate 13 needs to be assembled onto the back plate 12. Through the guiding cooperation of the first guide part 121 and the second guide part 131, the bristle plate 13 can be guided to the back plate 12 during the assembly process, so that the bristle plate 13 moves to the predetermined position with the back plate 12. In this way, the assembly speed of the bristle plate 13 and the back plate 12 is faster and the assembly accuracy is higher, thereby improving the assembly efficiency.

[0122] Furthermore, by providing the first guide portion 121 and the second guide portion 131, the assembly worker can assemble the back plate 12 and the bristle board 13 by aligning the first guide portion 121 and the second guide portion 131. In this way, it is possible to avoid installing the bristle board 13 in reverse at both ends along the length of the brush rod 11. That is, a foolproof function is achieved during the assembly process of the back plate 12 and the bristle board 13.

[0123] Please see Figure 7-8 As an embodiment of this application, the second guide portion 131 includes a second guide ramp 1311, and the first guide ramp 1211 abuts against the second guide ramp 1311. By setting the second guide portion 131 as the second guide ramp 1311, on the one hand, the structure of the second guide portion 131 is simple and easy to manufacture; on the other hand, during the assembly of the flocking plate 13 onto the back plate 12, the second guide ramp 1311 and the first guide ramp 1211 slide relative to each other to guide the flocking plate 13 onto the back plate 12. In this way, the second guide ramp 1311 and the first guide ramp 1211 only need to be roughly aligned to slide relative to each other, without the need for strict alignment for positioning, making the assembly process of the flocking plate 13 and the back plate 12 faster and more efficient.

[0124] Please see Figures 7-8 As an embodiment of this application, the first guide slope 1211 and the second guide slope 1311 are curved surfaces, wherein one of the first guide slope 1211 and the second guide slope 1311 is a convex curved surface and the other is a concave curved surface. For example, the first guide slope 1211 is a convex curved surface and the second guide slope 1311 is a concave curved surface. The convex curved surface and the concave curved surface slide relative to each other to guide the direction of the flocking plate 13 more specifically, so as to guide the flocking plate 13 more accurately to the back plate 12. In addition, after the flocking plate 13 is guided to the predetermined position of the back plate 12, the convex curved surface and the concave curved surface can limit each other, playing a positioning role between the flocking plate 13 and the back plate 12. In this way, it is convenient for the subsequent soft rubber part 15 to cover the back plate 12 and the flocking plate 13.

[0125] In some other embodiments, the first guide ramp 1211 and the second guide ramp 1311 are inclined planes. In this way, the first guide ramp 1211 and the second guide ramp 1311 slide and guide each other in a planar sliding manner, which can guide the flocking plate 13 to the back plate 12 more quickly.

[0126] In some other embodiments, the first guide portion 121 includes a guide hole (not shown in the figure), and the second guide portion 131 includes a guide post (not shown in the figure). During the assembly of the flocking plate 13 onto the back plate 12, the guide post is aligned with the guide hole, and the guide post and the guide hole slide against each other to achieve a guiding fit. In this way, the flocking plate 13 can be guided to the predetermined position of the back plate 12 more accurately.

[0127] It is understood that the aforementioned predetermined position can be a position where the tufted board 13 extends into the positioning groove 12a and is already in a stable state. That is, the first guide part 121 and the second guide part 131 slide relative to each other, guiding the tufted board 13 into the positioning groove 12a of the back plate 12 and keeping it relatively stable. Afterwards, the tufted board 13 is positioned and limited by the positioning groove 12a, and there is also a certain limiting and positioning effect between the first guide part 121 and the second guide part 131, which facilitates the subsequent covering of the soft rubber part 15 onto the back plate 12 and the tufted board 13 (hereinafter referred to as covering). After the brush head 10 is assembled, the positioning groove 12a can continue to position and limit the tufted board 13, and the first guide part 121 and the second guide part 131 can also continuously limit and position each other, which can further improve the connection stability between the tufted board 13 and the back plate 12.

[0128] Please see Figures 5-6 The bristle-forming plate 13 has a width direction and a thickness direction. The width direction of the bristle-forming plate 13 is perpendicular to its thickness direction and perpendicular to the length direction of the brush rod 11. Bristles 14 are disposed on the bristle-forming plate 13. The bristle-forming plate 13 is connected to the end of the brush rod 11 furthest from the output shaft of the motor 24 via a back plate 12. The output shaft of the motor 24 transmits vibrational energy to the back plate 12 through the brush rod 11, and then sequentially to the bristle-forming plate 13 and the bristles 14.

[0129] Please refer to the following: Figures 7-8The bristle plate 13 is generally plate-shaped and is used to fix the bristles 14. The bristle plate 13 includes a bristle-implanting surface 132a and a back surface 132b arranged opposite to each other. The bristles 14 extend from the bristle-implanting surface 132a, that is, the bristle-implanting surface 132a is the surface through which the bristles 14 pass from the inside of the bristle plate 13. The back surface 132b is arranged opposite to the bristle-implanting surface 132a and opposite to the back plate 12. When the user brushes their teeth, the bristle-implanting surface 132a is the surface facing the user's teeth, and the back surface 132b is the surface away from the user's teeth. Further, the bristle plate 13 also includes a peripheral side surface 132c located between the bristle-implanting surface 132a and the back surface 132b along its thickness direction. The back plate 12 is disposed on the side of the bristle plate 13 away from the bristles 14, that is, the back plate 12 is arranged opposite to the back surface 132b of the bristle plate 13.

[0130] Please see Figure 5 In one embodiment of this application, the bristle-planting plate 13 is separately disposed from the back plate 12 along its thickness direction, and the bristle-planting plate 13 is indirectly connected to the brush rod 11 through the back plate 12. The bristle-planting plate 13 and the back plate 12 can be manufactured separately to improve the manufacturing flexibility of the back plate 12 and the bristle-planting plate 13. More importantly, during the bristle-planting process, the bristle-planting plate 13 can be independent of the back plate 12 and the brush rod 11. Thus, the bristles 14 can be planted on the independent bristle-planting plate 13 first, and then the bristle-planting plate 13 with the bristles 14 can be assembled with the back plate 12. In this way, during the bristle-planting process, it is not necessary to carry the back plate 12 and the brush rod 11, and the bristle-planting process will not be affected or interfered with by the back plate 12 and the brush rod 11, making the bristle-planting process more efficient and accurate. In addition, the bristle-planting plate 13 is connected to the back plate 12. Compared to setting up the tufting plate 13 separately, the total thickness of the tufting plate 13 and the back plate 12 is necessarily greater than the thickness of the tufting plate 13 itself. Therefore, the brush head 10 has higher structural strength and reduces the risk of breakage of the tufting plate 13 and the back plate 12.

[0131] For example, the tufting plate 13 is generally elliptical in shape, so that the tufting plate 13 is adapted to the long arc-shaped arrangement of human teeth, which can cover more tooth areas and improve brushing efficiency.

[0132] Please see Figure 7-8 As an embodiment of this application, the hair-planting plate 13 includes a hair-planting main plate 132 and an annular protrusion 133 surrounding the peripheral side of the hair-planting main plate 132.

[0133] The bristle-implanting motherboard 132 has a bristle-implanting surface 132a and a back surface 132b arranged opposite to each other. The bristle-implanting surface 132a has multiple bristle-implanting holes 132d. The bristle-implanting holes 132d can penetrate both the bristle-implanting surface 132a and the back surface 132b, or they can only penetrate the bristle-implanting surface 132a. The roots of multiple clumps of bristles 14 are implanted one-to-one within the multiple bristle-implanting holes 132d. The bristles 14 can be implanted into the bristle-implanting holes 132d using either a copper-free bristle-implanting process or a copper-containing bristle-implanting process.

[0134] For example, the shape of the bristle implantation hole 132d can be at least one of the following: triangular, elongated, circular, rectangular, square, elliptical, polygonal, semi-circular, and arc-shaped. This embodiment does not limit this. The shape of the bristle implantation hole 132d is diverse, and bristles with different cross-sectional shapes can be set, making the types of brush heads 10 more diverse and the teeth cleaning effects more comprehensive.

[0135] like Figure 8 As shown, the annular protrusion 133 is annularly protruding on the peripheral side 132c. There is a height difference between the annular protrusion 133 and the back surface 132b, so that a first step structure 134 is formed between the annular protrusion 133 and the tufted main board 132. It can be understood that the annular protrusion 133 can also be replaced by multiple protrusions that are spaced apart and arranged circumferentially along the peripheral side 132c.

[0136] Please see Figures 6-9 Furthermore, the tufting main board 132 includes a mating part 135. Along the thickness direction of the tufting board 13, the mating part 135 protrudes from the back surface 132b. That is, the mating part 135 extends from the lower edge of the annular protrusion 133 near the back plate. The mating part 135 is embedded in the positioning groove 12a. During assembly, in any direction within the plane defined by the length direction of the brush rod 11 and the width direction of the tufting board 13, due to the mutual positioning and limiting of the mating part 135 and the positioning groove 12a, the range of motion of the tufting board 13 relative to the back plate 12 is extremely small. In addition, the annular protrusion 133 and... The back plate 12 abuts against the annular protrusion 133, and the abutting position of the back plate 12 forms an abutting area. In this way, in the thickness direction of the flocking plate 13, the flocking plate 13 cannot continue to move closer to the back plate 12. Therefore, the mutual positioning and limiting effect between the flocking plate 13 and the back plate 12 is better, which makes it easier for the soft rubber part 15 to wrap the back plate 12 and the flocking plate 13. It can also reduce the risk of misalignment caused by displacement of the back plate 12 and the flocking plate 13 during the wrapping process of the soft rubber part 15. In this way, accurate assembly between the soft rubber part 15, the back plate 12 and the flocking plate 13 can be achieved, and the product yield can be improved.

[0137] Please see Figure 6 or Figure 10 Furthermore, the bottom of the positioning groove 12a has a groove 12b, and the mating part 135 is at least partially placed in the groove 12b, so that after the mating part 135 extends into the positioning groove 12a, it further extends into the groove 12b, so that the mating part 135 and the back plate 12 can be mated more stably, so as to more stably realize the mutual limiting and positioning between the back plate 12 and the flocking plate 13.

[0138] Furthermore, the groove 12b is an annular groove 12b, and the mating part 135 is an annular mating part 135. In this way, the annular mating part 135 can be matched with the annular groove 12b in any direction perpendicular to the thickness direction of the flocking plate 13, thereby further improving the limiting and positioning stability between the back plate 12 and the flocking plate 13.

[0139] Please see Figure 7 As an embodiment of this application, at least two positioning bosses 16 are provided on the hair-planting surface 132a. The positioning bosses 16 have positioning holes 16a for positioning the hair-planting plate 13. By providing the positioning bosses 16 and positioning holes 16a, the hair-planting plate 13 can be positioned through the positioning holes 16a during the hair-planting process, so that the hair-planting plate 13 can be placed in the required position. Then, the hair-planting plate 13 is fixed by a clamp, and the bristles 14 are planted in the hair-planting holes 132d. In this way, the hair-planting efficiency is higher.

[0140] Please see Figure 12 As an embodiment of this application, the bristles 14 include multiple inner ring bristle clusters 141 and multiple outer ring bristle clusters 142. The multiple inner ring bristle clusters 141 are located in the central region of the bristle-planting surface 132a. The multiple inner ring bristle clusters 141 can be arranged arbitrarily, such as in rows, columns, arrays, or ring-shaped intervals. The multiple outer ring bristle clusters 142 are arranged in a ring-shaped interval on the outer periphery of the entire structure formed by the multiple inner ring bristle clusters 141. That is, the multiple outer ring bristle clusters 142 are located in the outer ring region of the bristle-planting surface 132a, and the outer ring bristle clusters 142 are farther away from the center of the bristle-planting surface 132a than the inner ring bristle clusters 141.

[0141] Please see Figure 7 as well as Figure 12 As an embodiment of this application, the positioning boss 16 is located inside the annular area formed by the outer ring bristle tufts 142. Specifically, the positioning boss 16 can be disposed between two adjacent inner ring bristle tufts 141, or between the inner ring bristle tufts 141 and the outer ring bristle tufts 142. In this way, the positioning boss 16 is at least partially covered by the outer ring bristle tufts 142, thereby improving the overall aesthetics of the brush head 10.

[0142] Please see Figure 12 As an embodiment of this application, bristles 14 are implanted in the positioning hole 16a. By implanting bristles 14 in the positioning hole 16a, the bristle density of the bristle implantation plate 13 can be further increased under the condition that the area of ​​the bristle implantation plate 13 is fixed, thereby improving the brushing precision and thus improving the brushing effect.

[0143] Please refer to the following: Figure 2 , Figure 5 as well as Figure 6The soft rubber part 15 covers at least the back and sides of the brush head body 18. Specifically, the soft rubber part 15 covers the back and sides of the back plate 12, and the soft rubber part 15 covers the peripheral side 132c of the bristle board 13 to fix the bristle board 13 and the back plate 12. In this way, there is a large contact surface between the soft rubber part 15 and the back and sides of the back plate 12, which can improve the connection stability between the soft rubber part 15 and the back plate 12.

[0144] Furthermore, since the flocking board 13 and the back plate 12 are separate, there is an abutting area between the back plate 12 and the flocking board 13, and the soft rubber part 15 also covers the abutting area between the back plate 12 and the flocking board 13.

[0145] Specifically, the contact point between the annular protrusion 133 and the back plate 12 constitutes the contact area. Both the contact area and the annular protrusion 133 are covered by the soft rubber part 15, thereby preventing water stains and cleaning liquids from entering the gap between the annular protrusion 133 and the back plate 12 in the contact area, thus improving the cleanliness of the brush head 10.

[0146] On the other hand, the peripheral side 132c of the brush head 10 also contacts the user's oral cavity, such as teeth or gums, through the soft rubber part 15, rather than directly contacting the user's oral cavity through the peripheral side 132c. During the high-frequency vibration of the brush head 10, because the material of the soft rubber part 15 is relatively soft, it is easy to undergo elastic deformation, thus playing a good role in shock absorption and effectively protecting the user's oral cavity.

[0147] Furthermore, the peripheral side of the annular protrusion 133 and the peripheral side of the back plate 12 are aligned along the thickness direction of the flocking plate 13. This ensures that the soft rubber part 15 is tightly fitted to the outer surface of the annular protrusion 133 and the side of the back plate 12, preventing gaps between the soft rubber part 15 and the annular protrusion 133 or the back plate 12 due to the height difference between them, thus preventing dirt and grime from accumulating in the gaps.

[0148] For example, the soft rubber part 15 may wrap around part of the peripheral side 132c or wrap around the entire peripheral side 132c. In this way, the contact area between the soft rubber part 15 and the peripheral side 132c of the flocking plate 13 can be increased, thereby improving the connection stability between the soft rubber part 15 and the flocking plate 13 and preventing the soft rubber part 15 from falling off the flocking plate 13.

[0149] Please see Figure 11As an embodiment of this application, the soft plastic part 15 includes a back plate covering portion 151 and a flocking plate covering portion 152 that are connected to each other. The back plate covering portion 151 covers the back plate 12, and the flocking plate covering portion 152 is connected to the back plate covering portion 151 and is arranged in a ring shape. The flocking plate covering portion 152 covers the peripheral side surface 132c of the flocking main plate 132, and the thickness of the back plate covering portion 151 is greater than the thickness of the flocking plate covering portion 152. During brushing, the bristles 14 are positioned opposite to the teeth, and correspondingly, the back plate covering part 151 is also positioned opposite to the user's oral cavity wall. Compared with the bristle plate covering part 152, the back plate covering part 151 has a greater probability and frequency of contact with the user's oral cavity wall. By setting the thickness of the back plate covering part 151 to be greater than the thickness of the bristle plate covering part 152, the back plate covering part 151 has a better shock absorption effect, thereby making the brush head 10 as a whole have a better shock absorption effect.

[0150] Please see Figure 6 as well as Figure 7 In one embodiment of this application, the upper edge of the annular protrusion 133 is lower than the flocking surface 132a, that is, there is a height difference between the annular protrusion 133 and the flocking surface 132a, so that a second step structure 137 is formed between the annular protrusion 133 and the flocking main board 132. The second step structure 137 is arranged around the periphery of the flocking main board 132, and the soft rubber part 15 covers the second step structure 137. Inevitably, the soft rubber part 15 covers the surface of the annular protrusion 133 near the flocking surface 132a, that is, the soft rubber part 15 covers the step surface of the second step structure 137. In this way, on the one hand, the contact area between the soft rubber part 15 and the flocking board 13 can be increased, and the connection stability between the soft rubber part 15 and the flocking board 13 can be improved; on the other hand, since part of the soft rubber part 15 is inserted into the step surface of the second step structure 137, the probability of the soft rubber part 15 detaching from the flocking board 13 can be reduced.

[0151] Please continue reading. Figure 11 As an embodiment of this application, the flocking board covering portion 152 may include a protruding covering portion 1521 and a stepped covering portion 1522 connected to each other. The protruding covering portion 1521 is annularly covering the annular protrusion 133, and the stepped covering portion 1522 is annularly covering the second stepped structure 137. The thickness of the connection between the protruding covering portion 1521 and the stepped covering portion 1522 is less than the thickness of the protruding covering portion 1521 and the stepped covering portion 1522.

[0152] Understandably, the connection between the protruding covering portion 1521 and the stepped covering portion 1522 covers the step edge of the second step structure 137. By setting the thickness of the connection between the protruding covering portion 1521 and the stepped covering portion 1522 to be less than the thickness of the protruding covering portion 1521 and the stepped covering portion 1522, on the one hand, the outer surface of the connection between the protruding covering portion 1521 and the stepped covering portion 1522 can be set as a smoothly transitioning arc surface, without needing to be set as an edge structure corresponding to the step edge of the second step structure 137, thus avoiding discomfort; on the other hand, the connection between the protruding covering portion 1521 and the stepped covering portion 1522 is more prone to phase transformation, and the stepped covering portion 1522 is more likely to be inserted into the second step structure 137 and fit tightly with the second step structure 137, reducing the risk of the stepped covering portion 1522 detaching from the second step structure 137.

[0153] like Figure 2 As shown in one embodiment of this application, the stepped covering part 1522 is flush with the bristle-forming surface 132a. Thus, there is no stepped structure between the stepped covering part 1522 and the bristle-forming surface 132a, which avoids dirt accumulation and makes the brush head 10 more aesthetically pleasing.

[0154] In another embodiment of this application, the stepped covering portion 1522 is lower than the bristle-embedded surface 132a. This reduces the probability of the stepped covering portion 1522 touching the teeth or oral cavity wall, thus reducing the feeling of foreign objects during brushing.

[0155] In another embodiment of this application, the stepped covering part 1522 is higher than the flocking surface 132a. In this way, the stepped covering part 1522 can further cover the flocking surface 132a, further increasing the contact area between the soft rubber part 15 and the flocking plate 13, and further improving the connection stability between the soft rubber part 15 and the flocking plate 13.

[0156] like Figure 2 as well as Figure 5 As shown, in one embodiment of this application, the soft rubber part 15 also covers the neck section 112, which can directly enhance the connection stability between the soft rubber part 15 and the brush handle 11. Since the soft rubber part 15 also covers the back plate 12 and the bristle board 13, the connection stability between the brush handle 11, the back plate 12 and the bristle board 13 can be indirectly enhanced through the soft rubber part 15.

[0157] Please see Figure 11As an embodiment of this application, in addition to the aforementioned backplate covering portion 151 and flocking plate covering portion 152, the soft rubber part 15 also includes a neck covering portion 153. The neck covering portion 153 is connected to both the backplate covering portion 151 and the flocking plate covering portion 152, and covers the neck segment 112. Specifically, the neck covering portion 153 is annularly covering the neck segment 112 to improve the connection stability between the neck covering portion 153 and the neck segment 112. It is understood that the neck covering portion 153 may also be non-annularly covering the neck segment 112, but rather covering the circumferential portion of the neck segment 112.

[0158] Please see Figure 2 as well as Figure 11 Furthermore, the thickness of the flocking plate covering part 152 is greater than the thickness of the neck covering part 153. That is, the thickness of the neck covering part 153 is thinner than that of the flocking plate covering part 152. In this way, while ensuring that the outer surface of the neck covering part 153 is flush with the outer surface of the main body section 111, the diameter of the neck section 112 can be made larger. Thus, the neck section 112 has higher structural strength and reduces the risk of the brush head 10 breaking at the neck section 112.

[0159] As an embodiment of this application, the hardness of the soft rubber part 15 is not less than 40 Shore hardness and not more than 50 Shore hardness. In this way, the soft rubber part 15 has suitable structural strength and elasticity, so that it will not affect the brushing comfort due to being too hard, nor will it be unable to stably fix the bristle board 13 and the back plate 12 due to being too soft.

[0160] As one embodiment of this application, the thickness of the soft plastic part 15 is not less than 0.4 mm and not more than 1 mm. This ensures that the soft plastic part 15 has suitable structural strength and elasticity, while also having a reasonable material cost. When the thickness of the soft plastic part 15 is less than 0.4 mm, its structural strength and elasticity are too low; when the thickness of the soft plastic part 15 is greater than 1 mm, excessive material usage leads to increased material costs. Specifically, the thickness of the soft plastic part 15 can be 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1.0 mm.

[0161] Please see Figure 12 As an embodiment of this application, the bristles 14 include a first bristle tuft and a second bristle tuft. The bristles of the first bristle tuft are arranged parallel to the central axis of the bristle implantation hole 134d, that is, the bristles of the first bristle tuft are perpendicular to the bristle implantation surface 132a. The bristles of the second bristle tuft are arranged at an angle to the central axis of the bristle implantation hole 134d, that is, the bristles of the second bristle tuft are arranged at an angle relative to the bristle implantation surface 132a.

[0162] Specifically, the bristles of the second bristle cluster can be straight bristles, which have a simple structure and are easy to manufacture. Alternatively, the bristles can be curved bristles, for example, spiral or S-shaped bristles. Curved bristles have a larger projection coverage area on the bristle implantation surface 132a and a larger contact area with the teeth.

[0163] Please see Figure 12 At least the bristles of the outer ring bristle 142 are arc-shaped bristles. In this way, the arc-shaped bristles of the outer ring bristle 142 can spread out to the area outside the bristle implantation surface 132a. That is, the projection of the arc-shaped bristles of the outer ring bristle 142 on the bristle implantation surface 132a can be partially located outside the bristle implantation surface 132a, so that the outer ring bristle 142 has a larger coverage area, so that the brush head 10 has a larger contact area with the teeth, thereby improving brushing efficiency.

[0164] As one embodiment of this application, the multi-cluster inner ring bristle tuft 141 may individually include a first bristle tuft or a second bristle tuft, or the multi-cluster inner ring bristle tuft 141 may simultaneously include both a first bristle tuft and a second bristle tuft. Similarly, the multi-cluster outer ring bristle tuft 142 may individually include either a first bristle tuft or a second bristle tuft, or the multi-cluster outer ring bristle tuft 142 may simultaneously include both a first bristle tuft and a second bristle tuft. Thus, the types of brush heads 10 are more diverse, and users can purchase and use corresponding brush heads 10 according to their oral conditions.

[0165] As an embodiment of this application, the orthographic projection of the top of the second bristle cluster on the bristle implantation surface 132a is greater than the orthographic projection of the root of the second bristle cluster on the bristle implantation surface 132a. That is, from the root to the top of the second bristle cluster, the second bristle cluster is arranged in a radiating manner. This solution can be achieved by setting the aforementioned arc-shaped bristles. In this way, the second bristle cluster has a larger coverage area, and the brush head 10 has a larger contact area with the teeth, thereby improving brushing efficiency.

[0166] As one embodiment of this application, the bristles of both the inner ring bristle tuft 141 and the outer ring bristle tuft 142 are either round-tipped or pointed; or, the bristles of the inner ring bristle tuft 141 are round-tipped and the bristles of the outer ring bristle tuft 142 are pointed; or, the bristles of the inner ring bristle tuft 141 are pointed and the bristles of the outer ring bristle tuft 142 are round-tipped. Thus, the type of bristles can be diverse, and the type of brush head 10 can also be diverse, allowing users to purchase and use the corresponding brush head 10 according to their oral condition.

[0167] Please see Figure 5As an embodiment of this application, the brush head 10 also includes a counterweight 17, which is disposed between the back plate 12 and the bristle plate 13 so that the counterweight 17 is stably fixed inside the brush head 10. The counterweight 17 can increase the weight of the entire brush head 10 body and play a certain shock absorption role.

[0168] Based on the above embodiments, by separating the back plate 12 and the tufting plate 13, and by further providing a soft rubber component 15 that covers the sides and back of the back plate 12 and the peripheral side 132c of the tufting plate 13, the brush head 10 of this embodiment has at least the following technical effects:

[0169] First, regarding the connection stability between the back plate 12 and the flocking plate 13, since the soft rubber component 15 covers the back and sides of the back plate 12, the contact area between the soft rubber component 15 and the back plate 12 is large, making the connection between the back plate 12 and the soft rubber component 15 more stable. Furthermore, since the soft rubber component 15 also covers the peripheral side surface 132c of the flocking plate 13, the contact area between the soft rubber component 15 and the peripheral side surface 132c is also large. Therefore, the peripheral side surface 132c of the flocking plate 13 and the soft rubber component 15 mutually restrain each other, preventing the soft rubber component 15 from loosening and detaching from the flocking plate 13 in any direction within the plane containing the flocking surface 132a, thus making the connection between the flocking plate 13 and the soft rubber component 15 more stable. Therefore, through the soft rubber component 15, a stable connection between the back plate 12 and the flocking plate 13 can be achieved.

[0170] Furthermore, the soft rubber part 15 can be injection molded onto the back plate 12 and the tufting plate 13 to cover the back plate 12 and the tufting plate 13, resulting in a stronger bond between the soft rubber part 15 and the back plate 12 and the tufting plate 13. Therefore, the soft rubber part 15 has better connection stability with the back plate 12 and the tufting plate 13, and even after the brush head 10 has been used for a long time in a high-frequency vibration environment, it is not easy to detach from the tufting plate 13, thus preventing the back plate 12 and the tufting plate 13 from separating from each other.

[0171] Secondly, the soft rubber part 15 covers the sides and back of the back plate 12 and the peripheral side 132c of the tufting plate 13. The soft rubber part 15 can cover the contact area between the back plate 12 and the tufting plate 13, so that water stains and cleaning liquids cannot enter the gaps in the contact area, thereby improving the cleanliness of the brush head 10.

[0172] Third, regarding the shock absorption effect, since the brush head 10 covers the back and sides of the back plate 12, and the soft rubber part 15 covers the peripheral side 132c of the bristle plate 13, the back of the brush head 10 contacts the user's mouth through the soft rubber part 15. Furthermore, the soft rubber part 15 also covers the peripheral side 132c of the bristle plate 13, so the peripheral side 132c of the brush head 10 contacts the user's mouth through the soft rubber part 15. The front of the brush head 10 contacts the user's mouth through the bristles 14. In summary, apart from the bristles 14 contacting the user's mouth, the bristle plate 13 and the back plate 12 hardly contact the user's mouth. The brush head 10, except for the front side where the bristles 14 are located, almost entirely contacts the user's mouth through the soft rubber part 15. Because the soft rubber part 15 is made of a soft material and easily undergoes elastic deformation, it provides good shock absorption, reducing damage to the oral cavity, especially sensitive teeth or sensitive gums, and effectively protecting the user's oral cavity.

[0173] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0174] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A brush head, characterized in that, The brush head includes: brush handle; The main body of the brush head; and, At least a soft rubber part covering the back and sides of the brush head body; The brush head body includes: Back panel; and, A bristle-planting plate is separately disposed from the back plate along its thickness direction. One of the bristle-planting plate and the back plate is connected to one end of the brush rod. Bristles are planted on the bristle-planting plate. The back plate has a positioning groove on the side facing the bristles, and the bristle-planting plate is partially placed in the positioning groove. The soft rubber part covers the back and peripheral sides of the back plate, and the soft rubber part also covers at least a portion of the peripheral sides of the bristle-planting plate to fix the bristle-planting plate and the back plate.

2. The brush head as described in claim 1, characterized in that, The soft rubber component covers the contact area between the back plate and the flocking plate.

3. The brush head as described in claim 2, characterized in that, The flocking plate has an annular protrusion; The annular protrusion is disposed outside the positioning groove and abuts against the back plate. The abutment position of the annular protrusion and the back plate constitutes the abutment area. The annular protrusion is covered by the soft rubber part.

4. The brush head as described in claim 3, characterized in that, The peripheral side of the annular protrusion is aligned with the peripheral side of the back plate along the thickness direction of the flocking plate.

5. The brush head as described in claim 1, characterized in that, The flocking board includes: The bristle-implanting main board has a bristle-implanting surface and a back surface arranged opposite to each other. The bristle-implanting surface has multiple bristle-implanting holes, and the roots of multiple clumps of bristles are correspondingly implanted into the multiple bristle-implanting holes; and An annular protrusion is provided in a ring shape on the peripheral side of the tufting motherboard. The annular protrusion is lower than the tufting surface, and the soft rubber part covers the surface of the annular protrusion that is close to the tufting surface.

6. The brush head as described in claim 5, characterized in that, The soft rubber part is flush with the flocked surface.

7. The brush head as described in claim 1, characterized in that, The soft rubber component includes: Back panel covering portion, covering the back panel; and The flocking board covering part is connected to the back plate covering part and covers the peripheral side of the flocking board; The thickness of the back panel covering part is greater than the thickness of the flocking board covering part.

8. The brush head as described in claim 7, characterized in that, The brush rod includes: Main body paragraphs; and A neck segment, connecting the main body segment to the back plate or the flocking plate, wherein the diameter of the neck segment is smaller than the diameter of the main body segment; The soft rubber component also includes: The neck covering is connected to both the back plate covering and the flocking plate covering, and covers the neck segment; The thickness of the flocking plate covering part is greater than the thickness of the neck covering part.

9. The brush head as described in claim 1, characterized in that, The hardness of the soft rubber part is not less than 40 Shore hardness and not greater than 50 Shore hardness; and / or, The thickness of the soft rubber part is not less than 0.4 mm and not more than 1 mm.

10. The brush head as described in claim 1, characterized in that, A first guide portion is provided at the connection between the back plate and the brush rod. The first guide portion is used to guide the tufting plate to a predetermined position on the back plate during the assembly process of the tufting plate and the back plate.

11. The brush head as described in claim 10, characterized in that, The first guide portion includes a first guide ramp.

12. The brush head as described in claim 11, characterized in that, As the brush bar points toward the back plate, the height of the first guide ramp relative to the back plate gradually decreases; and / or The width of the first guide ramp gradually increases from the direction in which the brush rod points toward the back plate.

13. The brush head as described in claim 10, characterized in that, The tufting plate has a second guide portion at one end near the brush rod, and the first guide portion and the second guide portion are guided and cooperated.

14. The brush head as described in claim 13, characterized in that, The first guide portion includes a first guide ramp; the second guide portion includes a second guide ramp, and the first guide ramp abuts against the second guide ramp.

15. The brush head as described in claim 1, characterized in that, The back plate has a positioning groove on the side facing the bristles, and the bristle-planting plate is placed in the positioning groove. The bottom of the positioning groove has a recess, and the flocking plate has a mating part, which is at least partially placed in the recess.

16. The brush head as described in claim 15, characterized in that, The groove is an annular groove, and the mating part is an annular mating part.

17. The brush head as described in claim 1, characterized in that, The flocking board is generally elliptical; and / or, The bristle-planting plate has a bristle-planting surface with multiple bristle-planting holes. The roots of multiple clusters of bristles are correspondingly planted in the multiple bristle-planting holes. The bristle-planting holes are at least one of triangular, elongated, circular, and rectangular shapes.

18. The brush head as described in claim 1, characterized in that, The bristle-planting plate has a bristle-planting surface with multiple bristle-planting holes. The roots of multiple clumps of bristles are correspondingly planted in the multiple bristle-planting holes. At least two positioning bosses are raised on the bristle-planting surface, and the positioning bosses have positioning holes for positioning the bristle-planting plate.

19. The brush head as described in claim 18, characterized in that, The bristles include: Multiple inner ring bristle tufts; and Multiple outer ring bristle clusters, the multiple outer ring bristle clusters are arranged in a ring at intervals on the outer periphery of the whole formed by the multiple inner ring bristle clusters; The positioning boss is located inside the annular area formed by the outer bristle clusters.

20. The brush head as described in claim 18, characterized in that, The bristles are embedded in the positioning hole.

21. The brush head as described in claim 1, characterized in that, The bristle-planting plate has a bristle-planting surface, and the bristle-planting surface has multiple bristle-planting holes, with the roots of multiple clusters of bristles correspondingly planted in the multiple bristle-planting holes. The bristles include a first bristle tuft and a second bristle tuft. The bristles of the first bristle tuft are arranged parallel to the central axis of the hair implantation hole, and the bristles of the second bristle tuft are arranged at an angle to the central axis of the hair implantation hole. The bristles include: Multiple inner ring bristle clusters, including the first bristle cluster and / or the second bristle cluster; as well as Multiple outer ring bristle clusters, wherein the multiple outer ring bristle clusters are arranged in a ring at intervals on the outer periphery of the entire body formed by the multiple inner ring bristle clusters, and include the first bristle cluster and / or the second bristle cluster.

22. The brush head as described in claim 21, characterized in that, The orthographic projection of the top of the second bristle tuft on the hair-planting surface is greater than the orthographic projection of the root of the second bristle tuft on the hair-planting surface.

23. The brush head as described in claim 1, characterized in that, The bristles include: Multiple inner ring bristle tufts; and Multiple outer ring bristle clusters, the multiple outer ring bristle clusters are arranged in a ring at intervals on the outer periphery of the whole formed by the multiple inner ring bristle clusters; Wherein, the bristles of the inner ring bristle tuft and the outer ring bristle tuft are both round-headed or pointed-headed bristles; or, the bristles of the inner ring bristle tuft are round-headed bristles and the bristles of the outer ring bristle tuft are pointed-headed bristles; or, the bristles of the inner ring bristle tuft are pointed-headed bristles and the bristles of the outer ring bristle tuft are round-headed bristles.

24. The brush head according to any one of claims 1-23, characterized in that, Also includes: A counterweight is disposed between the back plate and the flocking plate.

25. An electric toothbrush, characterized in that, The electric toothbrush includes: The brush head as described in any one of claims 1-24; and The toothbrush body has an output shaft that is detachably connected to the brush handle.

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