Brush head and oral care device

Abstract

The application discloses a brush head comprising a brush rod, a brush plate assembly, bristles and a soft rubber piece. One end of the brush rod is used for detachable connection with a main machine of an oral care device. The brush plate assembly is formed with opposite first and second surfaces. The first surface is the back surface of the brush plate assembly. The second surface is formed with a bristle implanting area. The brush plate assembly has opposite first and second ends along the length direction of the brush rod. The first end of the brush plate assembly is connected with the other end of the brush rod. The brush plate assembly is provided with a first slot body penetrating through the brush plate assembly along the width direction. The brush plate assembly is provided with a second slot body extending from the second surface to the first slot body along the thickness direction. The bristles are arranged in the bristle implanting area. The soft rubber piece is filled in at least the first and second slot bodies. The application also provides an oral care device with the aforementioned brush head.

Description

Technical Field

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

[0002] With the development of intelligent electric products, electric oral hygiene devices (such as electric toothbrushes) are becoming increasingly popular for daily oral hygiene due to their convenience.

[0003] Taking an electric toothbrush as an example, an electric toothbrush typically consists of a main unit and a brush head. The main unit drives the brush head to clean the target areas in the mouth. To achieve a shock-absorbing effect that prevents teeth from being jolted, the brush head usually has a soft rubber coating on the outside of the brush plate assembly, preventing direct contact between the teeth and the hard rubber brush plate when the user uses the brush head.

[0004] In related technologies, during the injection molding process of brush plate components, air may become trapped in the soft rubber during injection, resulting in gas or air bubbles remaining in the soft rubber and affecting the processing yield of the brush head. Utility Model Content

[0005] The main objective of this application is to provide a brush head and an oral care device.

[0006] Firstly, this application provides a brush head, comprising:

[0007] A brush handle, one end of which is detachably connected to the main unit of an oral care device;

[0008] A brush plate assembly has a first surface and a second surface, the first surface being the back surface of the brush plate assembly, and the second surface having a bristle-planting area. The brush plate assembly also has a first end and a second end along the length of the brush rod, the first end of which is connected to the other end of the brush rod. The brush plate assembly has a first groove extending through it along its width direction, and a second groove extending from the second surface to the first groove along its thickness direction.

[0009] Brush bristles, the brush bristles being disposed in the bristle-planting area;

[0010] A soft rubber component, wherein the soft rubber component fills at least the first groove and the second groove.

[0011] In the above embodiment, the brush assembly has a first groove extending through it along the width direction, and a second groove extending from the second surface to the first groove along the thickness direction. This brush assembly design allows the soft rubber to be injected into the brush head from one end during the injection molding process. As the soft rubber flows through the first groove, air within it can be expelled along the groove of the second groove in the thickness direction. This makes the second groove, extending along the thickness direction, part of the injection molding ventilation structure, effectively reducing the air bubble content in the soft rubber parts within both the first and second grooves, thereby improving the brush head's processing yield.

[0012] In some embodiments, the second groove extends through the brush assembly in the thickness direction, and / or the second groove extends through the brush assembly in the width direction.

[0013] In this embodiment, the second groove penetrates the brush assembly in at least one direction of the thickness and width of the brush assembly, thereby allowing for better air venting during the soft rubber injection molding process.

[0014] In some embodiments, in a cross-section along the width direction of the brush assembly, at least a portion of the first groove has a cross-sectional width greater than that of the second groove; or, in a cross-section along the width direction of the brush assembly, the cross-section formed by the first groove and the second groove has an asymmetrical geometry.

[0015] Optionally, the first groove has an arc-shaped, circular, or elliptical structure in cross-section along the width direction of the brush assembly.

[0016] In this embodiment, the above design facilitates the deformation of the first bristle-planting part of the brush assembly under external force. Furthermore, the cross-sectional shape of the first groove along its width is an arc-shaped structure. Compared to a right-angled groove, the arc-shaped structure has a longer service life due to deformation, thereby reducing the breakage of the support or connecting parts caused by bending of the brush assembly and improving the life of the brush head.

[0017] In some embodiments, in a cross-section along the width direction of the brush assembly, the first groove has a first dimension and the second groove has a second dimension, both the first dimension and the second dimension being greater than or equal to 0.5 mm.

[0018] In this embodiment, the inner diameter of the first groove and the inner diameter of the second groove are set within an appropriate range so that the soft rubber can smoothly enter the first groove and the second groove during the soft rubber injection molding process. This avoids the soft rubber from having too many air bubbles inside the soft rubber part after it has cooled and formed due to poor flow in the first groove and the second groove.

[0019] Meanwhile, the larger the space of the first groove and the wider the spacing between the inner walls of the second groove, the greater the deformability of the brush assembly under external force. However, a larger groove spacing may adversely affect the filling stability of the software. Therefore, in order to balance the deformation of the brush assembly and the filling stability of the software, the inner diameters of the first and second grooves are set to be greater than 0.5 mm.

[0020] In some embodiments, the brush assembly includes at least a support portion, a first tufting plate, and a second tufting plate, the second tufting plate being located between the first tufting plate and the brush rod, the support portion being connected to the brush rod, the first tufting plate and the second tufting plate being connected to the support portion and spaced apart along the length of the brush rod to form a second groove; and the first groove being formed between the support portion and adjacent first and second tufting plates.

[0021] Optionally, the support portion can deform under the action of external force to change the relative position between the first flocking plate and the second flocking plate.

[0022] In this embodiment, the support can deform under external force, thereby changing the relative position between the first bristle plate and the second bristle plate. This allows the bristles to better fit the target area (tooth surface) during oral cleaning, effectively improving the cleaning effect.

[0023] In some embodiments, the end of the support portion away from the brush bar is bent toward the side of the brush plate assembly that forms the bristle implantation area. This ensures that the bristle implantation plate away from the brush bar can bend more easily inward and have a better fit with the tooth surface. It also makes the support portion more likely to bend and deform toward the side closer to the bristles under external force, thereby giving the brush head better drop resistance.

[0024] In some embodiments, the deformation of the support portion toward the side closer to the bristles is greater than the deformation toward the side farther from the bristles.

[0025] In this embodiment, the support portion is more likely to deform towards the bristles, so that during the brush head drop, the support portion is more likely to deform towards the bristles than towards the bristles, thus giving the brush head better drop resistance.

[0026] In some embodiments, the brush plate assembly further includes a third tufting plate located on the side of the brush plate assembly closer to the brush rod and connected to the brush rod, a first tufting plate located on the side of the brush plate assembly away from the brush rod, a second tufting plate located between the first tufting plate and the third tufting plate, and the support portion connected to the brush rod via the third tufting plate.

[0027] Wherein, at least one second groove is formed between the second flocking plate and the third flocking plate, and at least one first groove is formed between the support portion and the adjacent second flocking plate and the third flocking plate.

[0028] In this embodiment, the brush plate assembly is provided with multiple bristle implantation plates, and at least one second groove is formed between two adjacent bristle implantation plates that penetrates the brush plate assembly. This allows the bristle implantation plates, at least partially away from the brush handle, to easily deform under external force, thereby enabling the bristles of the brush plate assembly to better fit the target area (tooth surface) and effectively improve the cleaning effect.

[0029] In some embodiments, the first grooves located on opposite sides of the second hair-planting plate have arc-shaped profiles with major and minor axes in the thickness direction of the brush plate assembly, and the major axes of the arc-shaped profiles are all directed toward the connecting section of the support portion, the projection of the connecting section in the hair-planting area being within the second hair-planting plate.

[0030] This design allows the first bristle plate to deform more easily toward the second bristle plate under external force, and the second bristle plate to deform more easily toward the third bristle plate, thus providing better elastic cushioning during brush head drop.

[0031] 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.

[0032] In this embodiment, by setting the hair-planting plates as described above, the hair-planting holes of the first hair-planting plate and the second hair-planting plate can be set along the mutually close sidewall edges, thereby effectively increasing the longitudinal density of the hair-planting holes between the second hair-planting plate and the first hair-planting plate, and improving the bristle density of the brush head.

[0033] In some embodiments, the support portion has a target support area along the length of the brush rod, the target support area being disposed corresponding to the second tufting plate; wherein the width of the target support area is less than the width of the second tufting plate; and / or, the thickness of the support portion is less than the width of the second tufting plate.

[0034] In this embodiment, the width or thickness of a portion of the support is reduced to facilitate deformation of the support.

[0035] In some embodiments, the target support area is recessed on opposite sides in the width direction toward the bristle side to form a recessed area; wherein the soft rubber part is also filled in the recessed area.

[0036] In this embodiment, by forming recesses on opposite sides of the back of the brush plate assembly, when the user brushes their teeth, especially when brushing the occlusal surface of the teeth, the back of the brush head is likely to hit the teeth on the opposite side of the occlusal surface. Therefore, in order to reduce the impact on the teeth on the opposite side, a recessed area is provided on the back of the brush plate assembly and filled with soft rubber. This increases the thickness of the soft rubber without increasing the thickness of the brush head, thereby alleviating or reducing the discomfort caused by impact.

[0037] In some embodiments, the support portion is formed with a connecting structure, and the second flocking plate is connected through the connecting structure.

[0038] Optionally, the cross-sectional area of ​​the connecting structure gradually decreases from the connection end with the support portion toward the connection end with the second flocking plate; or, the cross-sectional area of ​​the connecting structure gradually increases from the connection end with the support portion toward the connection end with the second flocking plate; or, the cross-sectional area of ​​the connecting structure is the same from the connection end with the support portion toward the connection end with the second flocking plate; or, the cross-sectional area of ​​the connecting structure first decreases and then increases from the connection end with the support portion toward the connection end with the second flocking plate.

[0039] In this embodiment, the second flocking plate is connected by a connecting structure, which makes the second flocking plate more prone to deformation relative to the support portion.

[0040] In some embodiments, the projection of the connecting structure along the length of the brush rod onto the second tufting plate is located in the middle region of the second tufting plate, or the projection of the connecting structure along the length of the brush rod onto the second tufting plate is located at one side edge of the second tufting plate.

[0041] In this embodiment, the connection method described above makes it easier for the second bristle plate to swing relative to the support portion on both sides along the length of the brush rod.

[0042] 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.

[0043] 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

[0044] 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.

[0045] Figure 1 This is a three-dimensional structural diagram of the oral cleaning device provided in the embodiments of this application;

[0046] Figure 2 A three-dimensional structural diagram of the main unit of the oral cleaning device provided in the embodiments of this application;

[0047] Figure 3 A three-dimensional structural diagram of the brush head from a first-view perspective, provided in an embodiment of this application;

[0048] Figure 4 This is a partial three-dimensional structural diagram of a brush head without bristles provided in an embodiment of this application.

[0049] Figure 5 This is a partial cross-sectional view of the brush head provided in an embodiment of this application;

[0050] Figure 6 This is a partial cross-sectional view of the first and second grooves of the brush head provided in the embodiments of this application, in which soft rubber is filled.

[0051] Figure 7 This is a partial structural diagram of the first deformed structure of the brush head provided in the embodiments of this application;

[0052] Figure 8 A first-view perspective three-dimensional structural diagram of the second deformed structure of the brush head provided in the embodiment of this application;

[0053] Figure 9 This is a partial structural schematic diagram from a second perspective of the second deformed structure of the brush head provided in the embodiments of this application;

[0054] Figure 10 This is a first-view three-dimensional structural diagram of the third deformed structure of the brush head provided in the embodiments of this application;

[0055] Figure 11 This is a second-view three-dimensional structural diagram of the third deformed structure of the brush head provided in the embodiments of this application;

[0056] Figure 12This is a schematic diagram illustrating the scene change of the third deformable structure of the brush head provided in the embodiments of this application under the action of external force, where the structure deforms towards the bristles.

[0057] Figure 13 This is a schematic diagram of the structure in which the first and second grooves of the brush head in the third modified structure provided in the embodiments of this application are filled with soft rubber parts;

[0058] Figures 14 to 17 Cross-sectional structural diagrams showing various implementations of the connection structure between the brush head support and the second tufting plate provided in the embodiments of this application;

[0059] Figure 18 This is a three-dimensional structural diagram showing the back of the brush plate assembly in the brush head provided in an embodiment of this application being covered by software. Detailed Implementation

[0060] 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.

[0061] 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.

[0062] 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.

[0063] Please see Figure 1 and Figure 2 , Figure 1 This is a three-dimensional structural diagram of an oral care device provided in an embodiment of this application.

[0064] like Figure 1 and Figure 2As shown, 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 used to drive the brush head 10 to move. The user can trigger the control component 22 by pressing, sliding, pushing, pulling, etc., so as to control the drive component 21 to perform corresponding actions. It can be understood that the oral care device 100 includes, but is not limited to, an electric toothbrush.

[0065] 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 effect of the brush head 10 of the oral care device 100 will decrease or 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 1000 to replace only the brush head 10 when replacement is needed, avoiding unnecessary waste.

[0066] 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.

[0067] Optionally, the electric motor can be set with different vibration modes of different degrees or directions, such as fast vibration, medium speed vibration, bidirectional vibration and interval vibration, which can drive the brush head 10 to have different vibration modes, and users can choose according to their own usage habits.

[0068] 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.

[0069] Please see Figures 3 to 6 In some embodiments, the brush head 10 includes a brush handle 11, a brush plate assembly 12, bristles 13, and a soft rubber part 14.

[0070] One end of the brush handle 11 is detachably connected to the main unit 20 of the oral care device 100, thereby enabling the brush head 10 to be detachably connected to the main unit 20.

[0071] The brush plate assembly 12 has a first end 12c and a second end 12d opposite each other in the length direction. The first end 12c of the brush plate assembly 12 is connected to the other end of the brush rod 11. The brush plate assembly 12 also has a first surface 12a and a second surface 12b opposite each other in the thickness direction. The first surface 12a is the back side of the brush plate assembly 12, and the second surface 12b has a bristle-planting area 120, in which bristles 13 are disposed.

[0072] Furthermore, the brush assembly 12 has a first groove 121 extending through the brush assembly 12 along its width direction, and a second groove 122 extending from the second surface 12b to the first groove 121 along its thickness direction, and the soft plastic part 14 at least fills the first groove 121 and the second groove 122. For example, the soft plastic part 14 is filled into the first groove 121 and the second groove 122 by soft plastic injection molding.

[0073] It is understood that the first slot 121 can be one or more, and the second slot 122 can also be one or more; no limitation is made here. For example... Figures 3 to 4 As shown, there is one first groove 121, which extends through the brush assembly 12 along its width. Figure 7 As shown, there are two first grooves 121, which extend through the brush assembly 12 along the width direction of the brush assembly 12.

[0074] In related technologies, in order to achieve the effect of shock absorption and preventing teeth from hitting, the brush head usually needs to be covered with soft rubber on the outside of the brush plate assembly, so that when the user uses the brush head, the teeth will not come into direct contact with the hard rubber brush plate of the brush plate assembly.

[0075] Typically, during the soft rubber injection molding process, the brush assembly needs to be placed into a pre-made mold, and soft rubber is poured into the mold so that after the soft rubber cools, it forms a soft rubber part that wraps around at least part of the surface of the brush assembly.

[0076] During the mechanical injection molding of soft rubber into the brush assembly 12, if the gap between the brush assembly and the mold is too small, or if grooves are provided on the brush assembly 12, air trapping may easily occur during the soft rubber injection process, resulting in gas or air bubbles remaining in the soft rubber. After the soft rubber cools and solidifies, the residual air bubbles will affect the processing yield of the brush head.

[0077] To solve the above problems, the present application embodiment provides a first groove 121 that penetrates the brush assembly 12 along the width direction, and a second groove 122 that extends from the second surface to the first groove 121 along the thickness direction.

[0078] In the process of forming the soft rubber part 14 by injection molding, the soft rubber can be injected from one end of the brush plate assembly 12. During the injection process, the soft rubber can quickly flow into the injection mold space through the first groove 121 provided on the brush plate assembly 12. When the soft rubber flows through the first groove 121, the air in the first groove 121 can be discharged along the groove of the second groove 122 in the thickness direction. This makes the second groove 122, which runs through the thickness direction, part of the injection ventilation structure during injection molding, effectively reducing the air entrapment problem that may occur in the soft rubber during the injection molding process in the first groove 121 and the second groove 122, thereby improving the processing yield of the brush head.

[0079] Optionally, in the cross section along the width direction of the brush assembly 12, at least a portion of the cross-sectional width of the first groove 121 is greater than the cross-sectional width of the second groove 121.

[0080] Optionally, in the cross section along the width direction of the brush assembly 12, the cross section formed by the first groove 121 and the second groove 122 has an asymmetrical geometry.

[0081] Through the above-mentioned groove structure design, and in the injection molding process, the soft rubber can quickly flow into the injection mold space through the first groove 121 set on the brush plate assembly 12, and when the soft rubber flows through the first groove 121, the air in the first groove 121 can be discharged along the groove of the second groove 122 in the thickness direction.

[0082] Optionally, in a cross-section along the width direction of the brush assembly 12, the first groove 121 has a first dimension and the second groove 122 has a second dimension, both the first dimension and the second dimension being greater than or equal to 0.5 mm. That is, in a cross-section along the width direction of the brush assembly 12, the first groove 121 has a first inner diameter and the second groove 122 has a second inner diameter, both the first inner diameter and the second inner diameter being greater than or equal to 0.5 mm. For example, the first inner diameter and the second inner diameter are 0.6 mm, 0.7 mm, and 0.9 mm, respectively, and are not limited here.

[0083] like Figure 7 As shown, the inner diameter of the first groove 121 and the inner diameter of the second groove 122 are set within an appropriate range so that the soft rubber can smoothly enter the first groove 121 and the second groove 122 during the soft rubber injection molding process. This avoids the soft rubber from having too many air bubbles in the soft rubber part 14 after it cools and forms a soft rubber part 14 due to poor flow in the first groove 121 and the second groove 122.

[0084] Furthermore, the larger the space of the first groove 121 and the wider the spacing between the inner walls of the second groove 122, the greater the deformability of the brush assembly 12 under external force. However, a larger spacing between the grooves may adversely affect the filling stability of the software. Therefore, in order to balance the deformation of the brush assembly 12 and the filling stability of the software, the inner diameter of the first groove 121 and the inner diameter of the second groove 122 are set to be greater than 0.5 mm.

[0085] In some embodiments, the second groove 122 extends through the brush assembly 12 in the thickness direction. Because the second groove 122 extends through the brush assembly 12 in the thickness direction, it increases the pathway for gas to escape from the first groove 121 and the second groove 122. This allows for better venting of gas during soft rubber injection molding through the first groove 121 and the second groove 122.

[0086] Please see Figures 8 to 9 In some embodiments, the second groove 122 penetrates the brush assembly 12 in the width direction and communicates with the first groove 121. Because the second groove 122 penetrates the brush assembly 12 in the width direction, compared to the aforementioned... Figures 2 to 7 The second groove 122 has a single-hole structure. Due to the small connection between the single-hole structure and the injection space formed by the injection mold, there is a chance of air trapping. The design of the second groove in this embodiment can form a larger connection between the second groove and the injection space of the injection mold. Thus, during the injection of soft rubber, the soft rubber can flow better through the second groove 122 and the second groove 122 can better vent air.

[0087] Please see Figures 10 to 13 In some embodiments, the brush assembly 12 includes at least a support portion 123, a first tufting plate 124, and a second tufting plate 125. The second tufting plate 125 is located between the first tufting plate 124 and the brush rod 11. The support portion 123 is connected to the brush rod 11. The first tufting plate 124 and the second tufting plate 125 are connected to the support portion 123 and are spaced apart in the length direction of the brush rod 11 to form a second groove 122. The first groove 121 is formed between the support portion 123 and the adjacent first tufting plate 124 and second tufting plate 125.

[0088] Optionally, the support portion 123 may deform under the action of external force, so as to change the relative position between the first flocking plate 124 and the second flocking plate 125.

[0089] It is understood that changing the relative position of the first hair-planting plate 131 and the second hair-planting plate 132 can be achieved by either a relative positional shift between the two plates, or a relative angular shift; no limitation is imposed here. Figure 12 As shown, the example of the support portion 123 deforming under external force is explained. When an external force F is applied to the end of the brush head 10 away from the brush handle 11, the support portion 123 deforms, causing the first bristle plate 124 to move closer to the second bristle plate 125. This changes the relative position between the first bristle plate 124 and the second bristle plate 125, allowing the bristles 13 of the brush head 10 to better fit the target area (tooth surface) during oral cleaning, effectively improving the cleaning effect.

[0090] In some embodiments, the end of the support portion 123 away from the brush handle 11 is bent toward the side of the brush plate assembly 12 that forms the bristle implantation area 120. This ensures that the bristle implantation plate away from the brush handle 11 can be bent inward more easily and has a better fit with the tooth surface. It also makes the support portion 123 more likely to bend and deform toward the side closer to the bristles 13 under external force, thereby giving the brush head 10 better drop resistance.

[0091] like Figure 12 As shown, the support portion 123 is bent towards the side of the brush plate assembly 12 where the bristle area 120 is formed, based on the fact that the end of the support portion 123 away from the brush rod 11 is bent towards the side of the brush plate assembly 12. During the fall of the brush head 10, the end of the brush head 10 away from the brush rod 11 is subjected to an external force F, making it easier for the support portion 123 to deform towards the side closer to the bristles 13. During the deformation of the support portion 123 towards the side closer to the bristles 13, the first bristle plate 124 moves towards the side closer to the second bristle plate 125, the gap between the first bristle plate 124 and the second bristle plate 125 decreases, and the soft rubber part 14 in the gap is compressed. The contraction allows the external force F on the first tufting plate 124 to be transmitted to the second tufting plate 125 through the soft rubber part 14 in the gap. The second tufting plate 125 then transmits the force to the brush rod 11. The second tufting plate 125 provides support to the first tufting plate 124, which can effectively transmit the external force on the brush head 10 to the brush rod 10 through the gap between the tufting plates. This avoids the first tufting plate 124 and / or the second tufting plate 125 bearing all the external force alone, thereby preventing the deformation of the first tufting plate 124 from exceeding its deformation range and breaking, and improving the drop resistance of the brush head 10.

[0092] In some embodiments, the deformation of the support portion 123 towards the bristles 13 is greater than the deformation towards the side away from the bristles 13. Specifically, the deformation of the support portion 123 is premised on the support portion 123 being able to elastically deform when subjected to an external force, and being able to elastically return to its original position after the external force is removed. If the deformation of the support portion 123 towards the bristles 13 is greater than the deformation towards the side away from the bristles 13, it means that under the same external force, the support portion 123 is more likely to elastically deform towards the bristles 13 than towards the side away from the bristles 13.

[0093] Because the end of the support portion 123 away from the brush rod 11 is bent toward the side of the brush plate assembly 12 that forms the bristle planting area 120, when an external force is applied to the first surface 12a and the second surface 12b along the thickness direction of the brush plate assembly 12, the support portion 123 is more likely to undergo elastic deformation toward the side closer to the bristles 13. During the fall of the brush head 10, the probability of the support portion 123 deforming toward the side closer to the bristles 13 is greater than the probability of deforming toward the side farther from the bristles 13. This avoids the problem that when the support portion 123 deforms toward the side farther from the bristles 13 during the fall, the external force on the first bristle planting plate 124 cannot be well transmitted to the second bristle planting plate 125, causing the external force generated by the fall to concentrate on the first bristle planting plate 124, resulting in damage to the first bristle planting plate 124 and / or the connection between the first bristle planting plate 124 and the support portion 123. This makes the brush head 10 have better drop resistance.

[0094] In some embodiments, the first groove 121 has an arc-shaped, circular, or elliptical cross-section along the width direction of the brush assembly 12. For example, the first groove 121 has an arc-shaped, circular, or elliptical cross-section along the width direction of the brush assembly 12.

[0095] In this embodiment, the design of the first groove 121 facilitates the deformation of the first bristle-planting part of the brush assembly 12 under external force. Specifically, when the first groove 121 has an angular structure and deforms, the stress generated on the sidewall of the first groove 121 will concentrate at the corner. This situation will cause the stress to concentrate at a specific location on the inner sidewall of the first groove 121 when the support plate 123 deforms. In this case, long-term or repeated deformation can easily cause material fatigue of the support part 123, eventually leading to the breakage of the support part 123. When the cross-sectional shape of the first groove 121 along the width direction is an arc-shaped structure, the arc-shaped structure is less prone to stress concentration during elastic deformation compared to the angular structure. Therefore, it can effectively reduce the material fatigue efficiency caused by long-term use or repeated deformation, improve the deformation bearing capacity of the support part 123, reduce the breakage of the support part 123 caused by the bending of the brush assembly 12, and improve the life of the brush head 10.

[0096] In some embodiments, the brush assembly 12 further includes a third tufting plate 126, which is located on the side of the brush assembly 12 closest to and connected to the brush rod 11. A first tufting plate 124 is located on the side of the brush assembly 12 furthest from the brush rod 11. A second tufting plate 125 is located between the first tufting plate 124 and the third tufting plate 126. A support portion 123 is connected to the brush rod 11 via the third tufting plate 126. At least one second groove 122 is formed between the second tufting plate 125 and the third tufting plate 126, and at least one first groove 121 is formed between the support portion 123 and adjacent second tufting plates 125 and third tufting plates 126.

[0097] In this embodiment, the brush plate assembly 12 is provided with multiple bristle implantation plates (first bristle implantation plate, second bristle implantation plate and third bristle implantation plate). At least one second groove 122 is formed between two adjacent bristle implantation plates, which allows the bristle implantation plates that are at least partially away from the brush handle 11 to easily deform under the action of external force. This allows the bristles 13 of the brush plate assembly 12 to better fit the target area (tooth surface) and effectively improve the cleaning effect.

[0098] In some embodiments, the first grooves 121 located on opposite sides of the second hair-planting plate 125 have arc-shaped profiles with major and minor axes in the thickness direction of the brush plate assembly 12, and the major axes of the arc-shaped profiles are all directed toward the connecting section 1232 of the support portion 123. The projection of the connecting section 1232 in the hair-planting area 120 is within the second hair-planting plate 125.

[0099] like Figures 11 to 13As shown, a first groove 121 is formed between the support portion 123 and the adjacent first hair-planting plate 124 and second hair-planting plate 125, and another first groove 121 is formed between the support portion 123 and the adjacent second hair-planting plate 125 and third hair-planting plate 126. At the same time, at least one second groove 122 is formed between the first hair-planting plate 124 and second hair-planting plate 125, and at least one second groove 122 is formed between the second hair-planting plate 125 and third hair-planting plate 126. The second groove 122 penetrates the brush plate assembly 12 in the width direction of the brush plate assembly 12 and communicates with the first groove 121. The cross-sectional profiles of the two first grooves 121 on opposite sides of the second tufting plate 125 in the thickness direction of the brush assembly 12 are approximately open ellipses. The major axis of these approximately open ellipses faces the side of the second tufting plate 125 closest to the support portion 123. Specifically, the major axis of the arc-shaped profiles all face the connecting section 1232 of the support portion 123. The projection of the connecting section 1232 in the tufting area 120 is within the second tufting plate 125. The major axis of the first groove 121 between the first tufting plate 124 and the second tufting plate 125 is... The connecting section 1232 is oriented so that when the first flocking plate 124 and the second flocking plate 125 are relatively displaced, the deformation point of the support part 123 is located at the end of the long axis of the first groove 121 between the second flocking plate 125 and the first flocking plate 124, which is close to the support part 123. This increases the rotation radius of the first flocking plate 124 and reduces the difficulty of relative displacement between the first flocking plate 124 and the second flocking plate 125. Under the action of external force, the first flocking plate 124 is more likely to deform towards the second flocking plate 125.

[0100] Similarly, the long axis of the first groove 121 between the second and third tufting plates 125 and 126 is also oriented towards the connecting section 1232 of the support 123. When the second and third tufting plates 125 and 126 are relatively displaced, the deformation point of the support 123 is located at the end of the long axis of the first groove 121 between the second and third tufting plates 125 and 126 that is close to the support 123. This increases the rotation radius of the second tufting plate 124 and reduces the difficulty of relative displacement between the second and third tufting plates 125 and 126. Under the action of external force, the second tufting plate 125 is more likely to deform towards the third tufting plate 126.

[0101] In some embodiments, the sidewall of the second hair-planting plate 125 protrudes from the sidewall of the first hair-planting plate 124, and the sidewall of the first hair-planting plate 124 is recessed from the sidewall of the second hair-planting plate 125; or, the sidewall of the second hair-planting plate 125 is recessed from the sidewall of the first hair-planting plate 124, and the sidewall of the first hair-planting plate 124 protrudes from the sidewall of the second hair-planting plate 125.

[0102] In this embodiment, by setting the hair-planting plates as described above, the hair-planting holes of the first hair-planting plate 124 and the second hair-planting plate 125 can be set along the mutually close sidewall edges, thereby effectively increasing the longitudinal density of the hair-planting holes of the second hair-planting plate 125 close to the first hair-planting plate 124, and improving the density of the bristles 13 of the brush head 10.

[0103] like Figure 10 and Figure 12 As shown, in some embodiments, the support portion 123 has a target support area along the length direction of the brush rod 11, and the target support area is disposed corresponding to the second tufting plate 125. The width of the target support area is smaller than the width of the second tufting plate 125. The support portion 123 has a target support area A along the length direction of the brush rod 11, which is disposed corresponding to the second tufting plate 125, and the width of the target support area A is smaller than the width of the second tufting plate 125; that is, the projected width of the target support area A on the second tufting plate 125 is smaller than the width of the second tufting plate 125.

[0104] Optionally, the thickness of the support portion 123 is less than the width of the second flocking plate 125.

[0105] In this embodiment, the width or thickness of a portion of the support portion 123 is reduced to facilitate deformation of the support portion 123.

[0106] like Figure 10 and Figure 12 As shown, in some embodiments, the target support area A is recessed on both sides in the width direction toward the bristle 13 to form a recessed area 127; wherein, the soft rubber part 14 is also filled in the recessed area 127. By forming recesses on both sides of the back of the brush plate assembly 12, when the user brushes their teeth, especially when brushing the occlusal surface of the teeth, the back of the brush head 10 is likely to hit the teeth on the opposite side of the occlusal surface. Therefore, in order to reduce the impact on the teeth on the opposite side, a recessed area 127 is provided on the back of the brush plate assembly 12 and filled with soft rubber, thereby increasing the thickness of the soft rubber without increasing the thickness of the brush head 10, so as to alleviate or reduce the discomfort caused by impact.

[0107] In some embodiments, the support portion 123 is formed with a connecting structure 1231, and the second flocking plate 125 is connected through the connecting structure 1231.

[0108] like Figures 14 to 17 As shown, optionally, the cross-sectional area of ​​the connecting structure 1231 gradually increases from the connection end with the support part 123 towards the connection end with the second flocking plate 125, as shown. Figure 14 As shown, the design of the connection structure 1231 can effectively increase the connection strength between the support part 123 and the second flocking plate 125.

[0109] Optionally, the cross-sectional area of ​​the connecting structure 1231 gradually decreases from the connection end with the support part 123 toward the connection end with the second flocking plate 125, such as... Figure 15 As shown, the design of the connection structure 1231 can effectively increase the connection strength between the support part 123 and the second flocking plate 125.

[0110] Optionally, the cross-sectional area of ​​the connecting structure 1231 decreases and then increases from the connection end with the support part 123 toward the connection end with the second flocking plate 125, such as... Figure 16 As shown. The above-mentioned connection structure 1231 is configured by thinning the connection structure between the support part 123 and the second flocking plate 125, so that the connection structure 1231 is more likely to deform under the action of external force.

[0111] Optionally, the cross-sectional area of ​​the connecting structure 1231 is the same from the connection end with the support part 123 towards the connection end with the second flocking plate 125, such as... Figure 17 As shown. Compared to Figures 14 to 16 The connection structure provided in this embodiment has a relatively simple manufacturing process and a high product yield.

[0112] In some embodiments, the projection of the connecting structure 1231 along the length of the brush rod 11 onto the second tufting plate 125 is located in the middle region of the second tufting plate 125. By connecting one end of the connecting structure 1231 to the middle region of the second tufting plate 125, the second tufting plate 125 can be tilted in the width direction of the brush assembly 12, and the tilting amplitude on both sides is relatively balanced.

[0113] Meanwhile, when the bristles 13 on the second bristle plate 125 are subjected to force, the second bristle plate 125 can tilt or sway more flexibly in different directions, thereby improving the adaptability of the bristles 13 and the user's tooth surface more flexibly according to the force on the bristles 13 on the second bristle plate 125.

[0114] In some embodiments, the projection of the connecting structure 1231 along the length of the brush handle 11 onto the second bristle plate 125 is located at one side edge of the second bristle plate 125. Compared to having one end of the connecting structure 1231 connected to the middle area of ​​the second bristle plate 125, the user only needs to apply less force when brushing to achieve a change in the position of the second bristle plate 125 in the width direction of the brush plate assembly 12, thereby reducing the difficulty of adapting the bristles 14 to the user's tooth surface. For example, when one end of the connecting structure 1231 is connected to one side edge of the second bristle plate 125 in the width direction, the second bristle plate 125 is more likely to wobble in the width direction of the brush plate assembly 12.

[0115] In this embodiment, the connection method described above makes it easier for the second bristle plate 125 to swing relative to the support portion 123 along the length direction of the brush rod 11 on both sides (that is, the brush plate assembly 12 in the width direction).

[0116] like Figure 18 As shown, in some embodiments, the soft rubber part 14 also covers the first surface 12a of the brush assembly 12, and / or, the soft rubber part 14 also covers the peripheral side surface between the first surface 12a and the second surface 12b of the brush assembly 12.

[0117] 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, characterized in that, include: A brush handle, one end of which is detachably connected to the main unit of an oral care device; A brush plate assembly has a first surface and a second surface, the first surface being the back surface of the brush plate assembly, and the second surface having a bristle-planting area. The brush plate assembly also has a first end and a second end along the length of the brush rod, the first end of which is connected to the other end of the brush rod. The brush plate assembly has a first groove extending through it along its width direction, and a second groove extending from the second surface to the first groove along its thickness direction. Brush bristles, the brush bristles being disposed in the bristle-planting area; A soft rubber component, wherein the soft rubber component fills at least the first groove and the second groove.

2. The brush head according to claim 1, characterized in that, The second groove penetrates the brush plate assembly in the thickness direction, and / or the second groove penetrates the brush plate assembly in the width direction.

3. The brush head according to claim 1, characterized in that, In a cross-section along the width direction of the brush assembly, at least a portion of the first groove has a cross-sectional width greater than that of the second groove; Alternatively, in a cross-section along the width direction of the brush assembly, the cross-section formed by the first groove and the second groove has an asymmetrical geometry.

4. The brush head according to claim 1 or 3, characterized in that, The first groove has an arc-shaped, circular, or elliptical structure in cross-section along the width direction of the brush assembly.

5. The brush head according to claim 1, characterized in that, In a cross-section along the width direction of the brush assembly, the first groove has a first dimension, and the second groove has a second dimension, both the first dimension and the second dimension being greater than or equal to 0.5 mm.

6. The brush head according to claim 1, characterized in that, The brush plate assembly includes at least a support portion, a first tufting plate, and a second tufting plate. The second tufting plate is located between the first tufting plate and the brush rod. The support portion is connected to the brush rod. The first tufting plate and the second tufting plate are connected to the support portion and are spaced apart along the length of the brush rod to form a second groove. The first groove is formed between the support portion and adjacent first and second tufting plates.

7. The brush head according to claim 6, characterized in that, The support portion can deform under external force, thereby changing the relative position between the first flocking plate and the second flocking plate.

8. The brush head according to claim 7, characterized in that, The deformation of the support portion towards the side closer to the bristles is greater than the deformation towards the side farther from the bristles.

9. The brush head according to claim 6, characterized in that, The support portion is bent toward the side of the brush plate assembly that forms the bristle-planting area, at the end away from the brush rod.

10. The brush head according to claim 6, characterized in that, The brush plate assembly further includes a third tufting plate, which is located on the side of the brush plate assembly closer to the brush rod and connected to the brush rod. The first tufting plate is located on the side of the brush plate assembly away from the brush rod. The second tufting plate is located between the first tufting plate and the third tufting plate. The support portion is connected to the brush rod through the third tufting plate. Wherein, at least one second groove is formed between the second flocking plate and the third flocking plate, and at least one first groove is formed between the support portion and the adjacent second flocking plate and the third flocking plate.

11. The brush head according to claim 10, characterized in that, The first grooves located on opposite sides of the second hair-planting plate have arc-shaped profiles with major and minor axes in the thickness direction of the brush plate assembly, and the major axis of the arc-shaped profiles are all directed toward the connecting section of the support portion. The projection of the connecting section in the hair-planting area is within the second hair-planting plate.

12. The brush head according to claim 6, characterized in that, 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.

13. The brush head according to claim 6, characterized in that, The support portion has a target support area along the length of the brush rod, and the target support area is provided corresponding to the second tufting plate; wherein the width of the target support area is smaller than the width of the second tufting plate; And / or, the thickness of the support portion is less than the width of the second flocking plate.

14. The brush head according to claim 13, characterized in that, The target support area is recessed on both sides in the width direction toward the bristle side to form a recessed area; wherein the soft rubber part is also filled in the recessed area.

15. The brush head according to claim 7, characterized in that, The support portion has a connecting structure, and the second flocking plate is connected through the connecting structure.

16. The brush head according to claim 15, characterized in that, The cross-sectional area of ​​the connecting structure gradually decreases from the connection end with the support part toward the connection end with the second flocking plate. Alternatively, the cross-sectional area of ​​the connecting structure gradually increases from the connection end with the support portion toward the connection end with the second flocking plate; Alternatively, the cross-sectional area of ​​the connecting structure is the same from the connection end with the support portion toward the connection end with the second flocking plate; Alternatively, the cross-sectional area of ​​the connecting structure decreases and then increases from the connection end with the support portion toward the connection end with the second flocking plate.

17. The brush head according to claim 15, characterized in that, The projection of the connecting structure along the length of the brush rod onto the second tufting plate is located in the middle region of the second tufting plate, or the projection of the connecting structure along the length of the brush rod onto the second tufting plate is located on one side edge of the second tufting plate.

18. An oral care device, characterized in that, It includes a main unit and a brush head as described in any one of claims 1-17, wherein the brush head is detachably connected to the main unit.

Images