Toothbrush head and electric toothbrush

Abstract

The utility model relates to the technical field of brushes, and provides a toothbrush head and an electric toothbrush. The bristle mounting pieces are mounted in the brush head shell; each bristle bundle is mounted on one bristle mounting piece and protrudes out of the outer surface of the brush head shell; at least part of the transmission assembly is installed in the brush head shell, and each bristle installation piece is in transmission connection with the transmission assembly so as to rotate and can drive each bristle bundle to rotate around the center shaft of the bristle bundle; wherein when the toothbrush head works, the rotating speed of each bristle bundle is 1-30 revolutions per second. According to the toothbrush head, the bristle bundles on the different bristle mounting pieces can rotate around the respective central shafts, so that the tooth cleaning effect of the toothbrush head can be improved, dead angles are prevented from being left in an oral cavity during cleaning, and the rotating speed of the bristle bundles is set, so that deep cleaning can be performed, and dental plaque can be thoroughly removed.

Description

Technical Field

[0001] This utility model relates to the field of brush technology, specifically to a toothbrush head and an electric toothbrush. Background Technology

[0002] Electric toothbrushes are becoming increasingly popular in modern homes due to their efficient cleaning capabilities and convenient usage. As a key component of electric toothbrushes, the brush head directly affects the cleaning effect and the user experience.

[0003] Most electric toothbrushes currently use ultrasonic or oscillating brush heads for cleaning. Ultrasonic electric toothbrushes, because the brush head does not rub against the teeth, are difficult to remove some stubborn stains. Oscillating electric toothbrushes, because the brush head has a limited range of motion and the oscillation speed is not fast enough, can easily leave blind spots and not clean thoroughly. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a toothbrush head that achieves teeth cleaning by self-rotation of multiple bristles and an electric toothbrush using the toothbrush head.

[0005] To solve the above problems, this utility model provides the following technical solution:

[0006] A toothbrush head comprising:

[0007] Brush head casing;

[0008] Multiple bristle mounting components are installed inside the brush head housing;

[0009] Multiple bristle bundles, each of which is mounted on a bristle mounting member and protrudes from the outer surface of the brush head housing;

[0010] A transmission assembly is at least partially installed inside the brush head housing. Each bristle mounting piece is connected to the transmission assembly so that it can rotate and drive each bristle bundle to rotate about its respective central axis.

[0011] When the toothbrush head is working, the rotation speed of each bristle bundle is 1-30 revolutions per second.

[0012] In one embodiment, when the toothbrush head is in operation, each of the bristle bundles rotates at a speed of 6-20 revolutions per second.

[0013] In one embodiment, when the toothbrush head is in operation, each of the bristle bundles rotates at a speed of 2-10 revolutions per second.

[0014] In one embodiment, the torque of the plurality of said bristle bundles is between 0 and 3 kgf·cm.

[0015] In one embodiment, the sidewall thickness of the brush head housing is between 0.5 and 1.5 mm.

[0016] This embodiment also provides a toothbrush head, which includes:

[0017] Brush head casing;

[0018] Multiple bristle mounting components are installed inside the brush head housing;

[0019] Multiple bristle bundles, each of which is mounted on a bristle mounting member and protrudes from the outer surface of the brush head housing;

[0020] A transmission assembly is at least partially installed inside the brush head housing. Each bristle mounting piece is connected to the transmission assembly so that it can rotate and drive each bristle bundle to rotate about its respective central axis.

[0021] Each of the bristle mounting components has at least one end facing the brush head housing in an interference fit with the brush head housing.

[0022] In one embodiment, the brush head housing is provided with a mounting groove opposite to the bristle opening, the bristle mounting member is installed in the mounting groove, and the bristle bundle extends out of the outer surface of the brush head housing from the bristle opening.

[0023] In one embodiment, the brush head housing is further provided with a limiting clip, which is located on the periphery of the mounting groove. The end of the bristle mounting member facing the brush head housing is provided with an interference fit, which is in interference fit with at least a portion of the limiting clip, and / or at least a portion of the interference fit is in interference fit with the limiting clip.

[0024] In one embodiment, the limiting card is provided with a first limiting groove, and the interference protrusion extends into the first limiting groove and abuts against the bottom of the first limiting groove.

[0025] In one embodiment, the interference-fit protrusion is inclined on one side of the first limiting groove and forms an inclined angle, the angle of which is between 30° and 60°.

[0026] In one embodiment, the brush head housing includes a brush head upper shell and a brush head lower shell that mates with the brush head upper shell. The brush head upper shell has a locking groove on the side near the brush head lower shell, and the brush head lower shell has a locking part on the side near the brush head upper shell. The brush head lower shell engages with the locking groove through the locking part, thereby assembling and connecting with the brush head upper shell.

[0027] In one embodiment, the number of the bristle mounting members is set to 7 to 16.

[0028] This embodiment also provides an electric toothbrush, characterized in that it includes a toothbrush head as described in any of the foregoing embodiments, and further includes:

[0029] A toothbrush handle, wherein the toothbrush head is mounted on one end of the toothbrush handle;

[0030] A drive motor is installed inside the toothbrush handle;

[0031] The drive motor is electrically connected to the transmission assembly, which transmits the power of the drive motor to the bristle mounting component, so that the bristle mounting component can drive the bristle bundle to rotate.

[0032] The beneficial effects of this utility model are: by setting multiple bristle mounting parts with bristle bundles inside the brush head shell, and by using a transmission component to drive different bristle mounting parts, the bristle bundles on different bristle mounting parts can rotate around their respective central axes, thereby improving the teeth cleaning effect of the toothbrush head, preventing dead corners from being left in the oral cavity during cleaning, and by setting the rotation speed of the bristle bundles, deep cleaning can be performed to thoroughly remove dental plaque. Attached Figure Description

[0033] Figure 1 This is a perspective view of one embodiment of a toothbrush head according to the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of one embodiment of a toothbrush head according to the present invention;

[0035] Figure 3 This is a schematic diagram of the brush head shell of one embodiment of the toothbrush head according to the present invention;

[0036] Figure 4 This is a cross-sectional view of one embodiment of a toothbrush head according to the present invention;

[0037] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0038] Figure 6 This is a cross-sectional view of another embodiment of the toothbrush head according to the present invention;

[0039] Figure 7 for Figure 6 A magnified view of a section at point B in the middle;

[0040] Figure 8 This is a top view schematic diagram of one embodiment of a toothbrush head according to the present invention;

[0041] Figure 9 This is a perspective view of one embodiment of an electric toothbrush according to the present invention;

[0042] Figure 10 This is an exploded view of one embodiment of an electric toothbrush according to the present invention.

[0043] Figure label:

[0044] 100. Toothbrush head; 110. Brush head housing; 111. Bristle mounting component; 112. Bristle bundle; 113. Transmission assembly; 114. Elastic seal; 110a. Bristle opening; 110b. Mounting groove; 110c. Second limiting groove; 111a. Sealing groove; 1121. Waterproof ring;

[0045] 1101. Brush head upper shell; 1102. Brush head lower shell; 1103. Ultrasonic wire; 1201. Engaging part; 120a. Engaging groove; 1202. First abutment surface; 1203. Second abutment surface; 1204. Interference fitting protrusion; 1205. Limiting clip; 120b. First limiting groove; 120c. Inclined angle;

[0046] 1102, transmission array; 1301, transmission gear; 1302, transmission shaft; 130a, first axis; 130b, second axis;

[0047] 200. Electric toothbrush; 211. Toothbrush handle; 212. Drive motor; 213. Power supply component; a1. Interference fit. Detailed Implementation

[0048] 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, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] For ease of description of the first, second, and third directions in the embodiments of this application, the first direction is the left-right direction in the figures, the second direction is the up-down direction in the figures, and the third direction is the front-back direction in the figures. The x-axis arrow direction is referred to as the "right" direction, the y-axis arrow direction as the "up" direction, and the z-axis arrow direction as the "front or back" direction, but these are not the sole limitations in the actual application of this application.

[0051] Example 1: Please refer to Figure 1-8 As shown, this embodiment provides a toothbrush head 100, which includes a brush head shell 110, bristle mounting members 111, bristle bundles 112, and a transmission assembly 113. The bristle mounting members 111 are installed inside the brush head shell 110, and the bristle bundles 112 are installed on each bristle mounting member 111 and protrude from the outer surface of the brush head shell 110. At least a portion of the transmission assembly 113 is installed inside the brush head shell 110. Each bristle mounting member 111 is rotatably connected to an adjacent bristle mounting member 111 and / or the transmission assembly 113, and can drive each bristle bundle 112 to rotate around its respective central axis.

[0052] Please refer to Figure 2 , 6 As shown in Figure 8, at least some of the transmission components 113 are arranged in the brush head housing 110 along the extending direction of the brush head housing 110 to form a transmission array 1102. The inner sidewall of the brush head housing 110 relative to the transmission array 1102 and / or the bristle mounting member 111 is spaced apart from the transmission array 1102 and / or the bristle mounting member 111. It can be understood that by arranging the transmission components 113 along the extending direction of the brush head housing 110 to form a transmission array 1102, the longitudinal space inside the brush head housing 110 can be utilized to the maximum extent, minimizing the spacing between each transmission component 113. Furthermore, since each bristle mounting member 111 is connected to the adjacent bristle mounting member 111 and / or transmission component 113, the limited volume can be fully utilized to accommodate the bristle mounting member 111. This not only realizes the transmission of multiple bristle mounting members 111 inside the brush head housing 110, but also reduces unnecessary space waste, which is conducive to the optimization of the internal structure of the brush head and improves the user experience.

[0053] According to the above scheme, the rotation speed of multiple bristle bundles 112 is set to 1-30 rpm. It can be understood that by setting the transmission function of the transmission component 113, that is, by controlling the power of the drive motor, the transmission effect of the transmission component 113 is controlled, so that the transmission of the transmission component 113 to the bristle mounting component 111 can meet the rotation speed range of 1-30 rpm. The bristle mounting component 111 drives the bristle bundles 112, thereby achieving the rotation speed range of 1-30 rpm for the bristle bundles 112. The selection of this rotation speed range is based on in-depth research on the human oral environment and tooth surface characteristics, ensuring that the bristle bundles 112 can provide sufficient mechanical friction during the cleaning process without damaging the teeth and gums. Within this rotation speed range, these movements can effectively penetrate the tooth surface and interdental spaces, removing plaque and food debris attached to the tooth surface, thereby performing deep cleaning and thoroughly removing plaque.

[0054] According to the above scheme, optionally, the thickness of a single bristle implanted in the bristle bundle 112 in this embodiment is between 0.05mm and 0.18mm.

[0055] Preferably, in some embodiments, the rotation speed of the multiple bristle bundles 112 is set to 6-20 revolutions per second. This rotation speed is suitable for adolescents and children after tooth replacement and adults with sensitive teeth, thereby meeting the needs of such users for safe, efficient and comfortable teeth cleaning.

[0056] Preferably, in other embodiments, the rotation speed of the multiple bristle bundles 112 is set to 2-10 revolutions per second, which is suitable for children, thereby meeting the safe, efficient and comfortable teeth cleaning needs of this user group.

[0057] Preferably, the torque of the multiple bristle bundles 112 is between 0-3 kgf·cm; specifically, the torque generated by each bristle bundle 112 during operation is in the range of 0-3 kgf·cm. This range ensures that the bristle bundles 112 provide sufficient cleaning power while cleaning teeth without causing excessive pressure on the teeth and gums. Furthermore, to achieve this torque range, the thickness of the brush head shell wall is limited, and the roots of the bristle bundles 112 are fixed to the bottom of the bristle mounting member 111, so that the bristle mounting member 111 can convert the transmission output of the transmission component 113 into the rotational motion of the bristle bundles 112, thereby generating a stable torque on each bristle bundle 112. In this way, the electric toothbrush can provide a comfortable user experience while ensuring cleaning effectiveness.

[0058] When the bristle bundle exceeds a certain torque, its rotation speed will decrease or stop. For example, the bristle bundle can be set so that when the torque exceeds 55 g·cm, its rotation speed will gradually decrease to 0. Understandably, designers can select a protective stopping torque within the range of 200 g·cm to 1200 g·cm based on the different regions and age groups of customers. This part is planned in the mini-program, which customers can set themselves. Optionally, in another design, a force bar can be presented to the customer instead of such a direct parameter, which is not limited here.

[0059] Please refer to Figure 8 As shown, preferably, the wall thickness L8 of the brush head housing 110 is designed to be between 0.5 and 1.5 mm, that is, the inner wall thickness L8 of the side of the brush head housing 110 relative to the bristle mounting member 111 and / or the transmission assembly 113 is between 0.5 and 1.5 mm, preferably between 0.8 mm and 1.2 mm.

[0060] For example, this embodiment uses a brush head shell 110 with a shell wall thickness L8 of 1.0 mm. 1.0 mm is a compromise choice that can achieve a balance between support strength, weight and internal space utilization, thereby reducing the volume of the brush head shell. It saves as much space as possible while maintaining a certain support strength. In addition, it ensures that the size of the bristle mounting part 111 matches the internal space of the brush head shell 110 to avoid overcrowding or emptiness.

[0061] Based on the above plan, it is understandable; please refer to it. Figure 1-2 and Figure 8 As shown, in this embodiment, multiple bristle mounting members 111 are provided, and the number of bristle bundles 112 corresponds to the number of bristle mounting members 111, so that each bristle mounting member 111 is provided with one bristle bundle 112. The teeth are cleaned through multiple bristle bundles 112. Furthermore, the transmission assembly 113 is used to drive each bristle mounting member 111, allowing each bristle mounting member 111 to rotate independently, thereby driving the bristle bundles 112 to rotate and thus cleaning the teeth. In the design of the brush head 100, the connection mechanism between the bristle mounting member 111 and the transmission assembly 113 is that each bristle mounting member 111 has a transmission function. The transmission assembly 113 can drive the bristle mounting member 111 in contact with the transmission assembly 113 to move. When the bristle mounting member 111 moves, it can drive the other bristle mounting members 111 in contact with itself to move. Specifically, the side of the bristle mounting member 111 has a structure that meshes with the transmission assembly 113. This means, please refer to... Figure 9-10As shown, when the electric toothbrush 200 is started, the power generated by the motor is transmitted to a series of gears and drive shaft 1302 of the transmission assembly 113, thereby transmitting the power to each bristle mount 111, enabling it to rotate about its own axis. Since each bristle mount 111 is independent and associated with the transmission assembly 113, they are able to drive their respective bristle bundles 112 to rotate.

[0062] According to the above scheme, in some embodiments, each bristle mounting member 111 has at least one end facing the brush head housing 110 in an interference fit with the brush head housing 110; specifically, please refer to Figure 4-5 As shown, each bristle mount 111 is designed at least at one end to match the shape of the inner wall of the brush head housing 110. When the bristle mount 111 is mounted on the brush head housing 110, the bristle mount 111 is slightly pressed down, thereby forming a tight connection with the inner wall of the brush head housing 110, thus maintaining the sealing effect at the part where the bristle bundle 112 passes through the brush head housing 110.

[0063] According to the above scheme, in some other embodiments, the toothbrush head 100 also includes a plurality of elastic seals 114, please refer to Figure 6-7 As shown, each elastic seal 114 is installed between a corresponding bristle mount 111 and the inner wall of the brush head housing 110, ensuring an effective seal during the pressing process. Each bristle bundle 112 passes through the elastic seal 114 and extends out of the outer surface of the brush head housing 110. Understandably, the elastic seal 114 is compressed during the pressing process, which fills the tiny gaps between the bristle mount 111 and the brush head housing 110, forming a tighter sealing interface. This effectively prevents liquids such as water and toothpaste from seeping into the brush head during brushing, protecting the internal electronic components and transmission assembly 113.

[0064] It is understandable that the toothbrush head 100 can use both the elastic seal 114 and the interference fit to maximize the sealing effect; however, the elastic seal 114 or the interference fit can be used alone, and this application does not impose any restrictions.

[0065] Please refer to Figure 1-3 and Figure 6-8As shown, preferably, the brush head housing 110 has a bristle through-hole 110a and a mounting groove 110b opposite to the bristle through-hole 110a. An elastic seal 114 is disposed on one side of the bristle through-hole 110a, and a bristle mounting member 111 is mounted in the mounting groove 110b. The bristle bundle 112 extends out of the outer surface of the brush head housing 110 from the bristle through-hole 110a. Specifically, the outer surface of the brush head housing 110 has several bristle through-holes 110a communicating with the interior. These through-holes are typically circular or elliptical, with a diameter slightly larger than the diameter of the bristle bundle 112, to ensure that the bristle bundle 112 can smoothly pass through and extend out of the brush head housing 110. Surface; Inside the brush head housing 110, a mounting groove 110b is provided at a position opposite to each bristle through-hole 110a. The shape and size of the mounting groove 110b match the bristle mounting member 111, ensuring that the bristle mounting member 111 can be accurately embedded therein. By designing the mounting groove 110b, the installation of the bristle mounting member 111 is limited to provide sufficient space and stability, preventing the bristle mounting member 111 from loosening or falling off during use. The inner wall of the mounting groove 110b is usually precision machined to ensure a smooth surface and accurate dimensions, so as to achieve a tight fit with the bristle mounting member 111.

[0066] Please refer to Figure 6-8 As shown, preferably, the top of the bristle mounting component 111 facing the bristle opening 110a is provided with a first abutting surface 1202, and the brush head shell 110 is provided with a second abutting surface 1203 opposite to the first abutting surface 1202 on the periphery of the bristle opening 110a. When the bristle mounting component 111 is installed in the mounting groove 110b, the elastic sealing component 114 abuts against the first abutting surface 1202 and the second abutting surface 1203 respectively. It can be understood that the elastic sealing component 114 abuts against the first abutting surface 1202 and the second abutting surface 1203 respectively, thereby generating pressure on the upper and lower sides of the elastic sealing component 114 by the first abutting surface 1202 and the second abutting surface 1203, causing the elastic sealing component 114 to... The seal 114 is compressed and deformed, achieving a sealing effect. Furthermore, in this embodiment, both the first contact surface 1202 and the second contact surface 1203 are set as planes. When the elastic seal 114 is installed between the two contact surfaces, the pressure it bears will be more evenly distributed on the elastic seal 114, which helps to extend the service life of the elastic seal 114. In other embodiments, the first contact surface 1202 and the second contact surface 1203 can also be designed as arc surfaces or curved surfaces to further improve the sealing performance, because arc surfaces or curved surfaces can better adapt to the shape of the elastic seal 114, increase the contact area, thereby improving the sealing performance and reducing the possibility of leakage.

[0067] Please refer to Figure 4-5As shown, preferably, the brush head housing 110 is further provided with a limiting clip 1205, which is located on the periphery of the mounting groove 110b. The end of the bristle mounting member 111 facing the brush head housing 110 is provided with an interference fit protrusion 1204, which is in interference fit with at least a portion of the limiting clip 1205, and / or at least a portion of the interference fit protrusion 1204 is in interference fit with the limiting clip 1205. It can be understood that this design, through precise dimensional control and material selection, ensures the stability and sealing of the bristle mounting member 111 within the mounting groove 110b. This interference fit not only prevents the bristle mounting member 111 from loosening and falling off during use, but also effectively prevents liquid from flowing into the interior of the brush head housing 110 along the bristle bundle 112, protecting the internal electronic components and transmission assembly 113. With this design, the brush head of the electric toothbrush 200 can not only achieve independent rotation of each bristle bundle 112 to improve cleaning effect, but also ensure stability and reliability after long-term use, extend the product's lifespan, and enhance the user experience.

[0068] In the above scheme, preferably, the interference amount a1 of the interference fit between the limiting clip 1205 and the interference protrusion 1204 is between 20% and 50%; optionally, in this embodiment, at least a portion of the interference protrusion 1204 is used to interfere with the limiting clip 1205, and the interference amount a1 generated by the interference fit between the interference protrusion 1204 and the limiting clip 1205 is 40%; it can be understood that a 40% interference amount a1 can ensure that a very tight contact is formed between the bristle mounting part 111 and the limiting clip 1205, effectively preventing liquid from flowing into the brush head housing 110 along the bristle bundle 112. Compared with a lower interference amount a1, a 40% interference amount a1 provides a stronger sealing effect and reduces the risk of liquid leakage; furthermore, compared with a higher interference amount a1, a 40% interference amount a1 provides sufficient fixing force without causing excessive stress on the material, thereby avoiding excessive deformation or damage to the material.

[0069] Please refer to Figure 4-5 As shown, preferably, the limiting member 1205 is provided with a first limiting groove 120b, and the interference protrusion 1204 extends into the first limiting groove 120b and abuts against the bottom of the first limiting groove 120b; optionally, in this embodiment, by providing a first limiting groove 120b on the limiting member 1205, the stability and sealing of the brush mounting member 111 in the mounting groove 110b are improved. In other embodiments, the first limiting groove 120b can be replaced with other structures to form an interference fit with the interference protrusion 1204.

[0070] Please refer to Figure 4-5As shown, preferably, the side of the interference fit 1204 that abuts against the first limiting groove 120b is inclined and forms an inclined angle 120c. It can be understood that by inclining the side of the interference fit 1204 that abuts against the first limiting groove 120b, the brush mounting part 111 can be smoothly slid into the first limiting groove 120b for installation, while also reducing the frictional resistance during the assembly process and ensuring the smooth realization of the interference fit.

[0071] Please refer to Figure 4-5 As shown, preferably, the angle range of the tilt angle 120c is between 30 and 60°.

[0072] Optionally, the tilt angle 120c is set to 30°.

[0073] Please refer to Figure 3 As shown, preferably, the brush head housing 110 includes a brush head upper housing 1101 and a brush head lower housing 1102 that mates with the brush head upper housing 1101. The brush head upper housing 1101 has a locking groove 120a on the side near the brush head lower housing 1102, and the brush head lower housing 1102 has a locking part 1201 on the side near the brush head upper housing 1101. The brush head lower housing 1102 engages with the locking groove 120a through the locking part 1201, thereby assembling and connecting with the brush head upper housing 1101. It can be understood that the brush head upper housing 1101 is a toothbrush... The upper half of the head 100 is designed with a bristle through-hole 110a. The lower half of the brush head is the lower part of the brush head, which typically includes the installation space for the transmission assembly 113 and the design structure of the mounting groove 110b. Furthermore, the edge of the engaging part 1201 may be designed with a slight chamfer to help with easier alignment and insertion during assembly. The design of the engaging part 1201 and the engaging groove 120a makes the assembly process of the upper brush head shell 1101 and the lower brush head shell 1102 simple and quick, reducing assembly time and cost.

[0074] Please refer to Figure 3 and Figure 8As shown, preferably, one of the brush head upper shell 1101 and the brush head lower shell 1102 has an ultrasonic wire 1103 on its side near the other. The ultrasonic wire 1103 is fused to the connection between the brush head upper shell 1101 and the brush head lower shell 1102 when the brush head upper shell 1101 is assembled into the brush head lower shell 1102. Specifically, the ultrasonic wire 1103 is provided on the engaging part 1201, and the ultrasonic wire 1103 is fused between the engaging part 1201 and the engaging groove 120a when the engaging part 1201 engages with the engaging groove 120a. It is understood that the ultrasonic wire is usually made of a hot melt material, such as hot melt adhesive or thermoplastic elastomer (TPE). Using ultrasonic welding equipment, the ultrasonic energy is concentrated on the contact surface of the engaging part 1201 and the engaging groove 120a. The ultrasonic energy, through the heat generated by high-frequency vibration, rapidly melts the ultrasonic wire, forming a molten state. During the ultrasonic welding process, the engaging portion 1201 of the brush head shell 1101 is pressed into the engaging groove 120a of the brush head lower shell 1102, ensuring that the ultrasonic wire completely melts upon contact with the engaging groove 120a and solidifies after cooling, forming a robust sealing layer. This ensures a tight connection between the brush head shell 1101 and the brush head lower shell 1102. Understandably, the ultrasonic wire formed by ultrasonic welding effectively prevents liquids and dirt from entering the toothbrush head 100, protecting it. The internal transmission assembly 113 and electronic components, along with the ultrasonic wire, exhibit high strength and durability after curing, maintaining a good sealing effect even after prolonged use. This effectively prevents liquids such as water and toothpaste from dripping onto the brush head shell during brushing and seeping into the interior of the brush head shell through gaps. It ensures the seal between the upper and lower shells of the brush head, protecting the internal electronic components and transmission assembly, reducing the risk of corrosion and damage to internal parts, thereby extending the lifespan of the toothbrush head, reducing the risk of electrical failures, and improving the safety of product use.

[0075] Preferably, the ultrasonic wire 1103 is located on the outside of the engaging portion 1201; the purpose of this design is to make the ultrasonic wire 1103 easier to process, as placing it inside would make it difficult for the ultrasonic wire to be touched by ultrasonic waves or other processing tools.

[0076] Optionally, the thickness L7 of the ultrasonic wire 1103 is designed to be between 0.2 and 0.5 mm. This range makes the ultrasonic wire 1103 thinner, thus achieving a seal between the brush head shell 1101 and the brush head lower shell 1102 without occupying space. In addition, the thickness L7 of the ultrasonic wire 1103 within this range can provide sufficient resistance to deformation, ensuring that the toothbrush head 100 will not deform due to external pressure during use. Furthermore, the thin design L7 of the ultrasonic wire 1103 makes it easier to process and install, and it can be easily embedded between the engaging part 1201 and the engaging groove 120a, ensuring that there will be no excessive deformation or damage during the welding process.

[0077] Preferably, the number of bristle bundles 112 is set to be greater than or equal to 7, preferably 7 to 16, to ensure the efficiency and uniformity of the brush head when cleaning teeth. Furthermore, the bristle bundles 112 are typically evenly distributed on the surface of the brush head to ensure that each bristle bundle 112 can cover different areas of the teeth, improving the cleaning effect. It is understood that increasing the number of bristle bundles 112 will lead to an increase in the weight and volume of the brush head. In this embodiment, the number of bristle bundles 112 is designed to be 10. The more bristle bundles 112 there are, the more bristle mounting pieces 111 there are, resulting in a reduction in the volume of the bristle mounting pieces 111 and the transmission gear 1301 within a fixed installation space, ensuring sufficient torque and rotational speed. Under this structure, to ensure smooth and efficient transmission, the number of teeth and module of the transmission gear 1301 need to be optimized according to the number of bristle bundles 112. For example, the number of teeth of the transmission gear 1301 is between 9 and 30, and the module is between 0.12 and 0.4.

[0078] Please refer to Figure 1-3 and Figure 6-8 As shown, preferably, the transmission assembly 113 includes a transmission gear 1301 and a transmission shaft 1302. The bristle mounting member 111 is mounted on the end of the brush head housing 110 along the first direction, and the transmission shaft 1302 is mounted on the end of the brush head housing 110 away from the bristle mounting member 111 along the first direction. The transmission gear 1301 is connected to the brush head mounting member and the transmission shaft 1302. Specifically, the transmission shaft 1302 is the core component of the entire transmission system, responsible for transmitting the power of the motor mounted on the toothbrush handle 211 to the transmission gear 1301. One of the transmission gears 1301 near the bristle mounting member 111 is connected to one of the bristle mounting members 111, and one of the transmission gears 1301 near the transmission shaft 1302 is connected to the transmission shaft 1302. Further, the transmission gear 1301 is mounted along the first direction on the brush head mounting member and the transmission shaft 1302. The shafts 1302 are arranged between each other and along the first direction within the brush head housing 110, and rotate about an axis perpendicular to the center of each transmission gear 1301 along the second direction. Furthermore, the transmission shafts 1302 are rotatable about the first axis 130a along the first direction, and the transmission shafts 1302 can drive the transmission gears 1301 to rotate about the second axis 130b along the second direction. In addition, the outer wall of the bristle mounting member 111 is provided with a transmission wall, and the transmission wall of any bristle mounting member 111 is meshed with the transmission wall of the adjacent bristle mounting member 111 and / or the transmission gear 1301. It can be understood that when the transmission shaft 1302 rotates about the first axis 130a, it can drive the transmission gear 1301 to rotate about the second axis 130b through the meshing action of the transmission gear 1301. This vertical axis design makes the conversion of the motion direction more flexible and efficient.

[0079] Preferably, the rotational speed of the transmission gear is set within the range of 3-20 revolutions per second. This design allows for precise force detection and control, ensuring efficient cleaning of teeth while maximizing the protection of the user's oral health. Specifically, through precise force detection and control (using sensors), the system can monitor changes in brushing pressure in real time. When excessive force is detected, the system automatically reduces the rotational speed or stops rotating to avoid damage to teeth and gums. Furthermore, when the brush head contacts sensitive areas in the mouth or detects an abnormality, the system immediately stops rotating to prevent accidental injury. In addition, the device automatically shuts off when the operating temperature exceeds the safe range to ensure safe use. The handle is made of non-slip material to ensure a stable grip even with wet hands, reducing the risk of slippage. The 3-20 revolutions per second rotational speed range effectively removes plaque from the surface and crevices of teeth. Especially for children and adolescents during the teething period, this design can deeply clean newly erupted permanent teeth, preventing cavities and periodontal disease. The optimized transmission system and shock absorption design make the device virtually silent during operation, providing a quiet and comfortable experience. In terms of brushing experience, the bristles are made of soft material, which is gentle on gums and baby teeth, reducing discomfort during brushing. Furthermore, users can choose different speed modes, including cleaning and comfort modes, to meet the needs of different tooth types. The intelligent system automatically adjusts the speed based on the user's oral condition and brushing habits, ensuring optimal results every time. Understandably, these benefits make this electric toothbrush with its speed setting suitable for children and teenagers, who are in a critical period of tooth development and require special attention to oral hygiene. The 3-20 RPM design ensures effective cleaning while protecting newly erupted permanent teeth and delicate gums. Moreover, for adults with sensitive teeth, this design provides gentle yet effective cleaning, reducing discomfort while ensuring oral health.

[0080] Please refer to Figure 2 and Figure 4 As shown, according to the above scheme, it can be understood that part of the transmission component 113 in this embodiment is disposed inside the toothbrush head 100. Specifically, the transmission component 113 includes a transmission gear 1301 and a transmission shaft 1302. The transmission gear 1301 is disposed inside the toothbrush head 100, and one end of the transmission shaft 1302 is disposed inside the brush head housing 110, and the other end is connected to the drive motor 212 inside the toothbrush handle 211, thereby extending to the outside of the brush head housing 110. In other embodiments, the transmission component 113 can also be designed to be entirely disposed inside the brush head housing 110, and transmission can be achieved through other transmission structures.

[0081] Preferably, the gap between the transmission gear 1301 and the inner wall of the brush head housing 110 along the first direction and the third direction is between 0.05 and 0.2 mm.

[0082] Preferably, the gap between the bristle mounting member 111 and the inner wall of the brush head housing 110 along the first direction and the third direction is between 0.05 and 0.3 mm.

[0083] Preferably, the outer diameter L1 of the elastic seal 114 is between 3.9 and 5.0 mm, the inner diameter L2 of the elastic seal 114 is between 2.0 and 3.4 mm, the thickness L3 of the elastic seal 114 is between 0.3 and 0.5 mm, the diameter L4 of the bristle through-hole 110a is between 1.8 and 3 mm, and the distance L5 between the first abutment surface 1202 and the second abutment surface 1203 is between 0.2 and 0.4 mm.

[0084] Based on the above scheme, it is understandable that the transmission gear 1301 and the bristle mounting component 111 have a small gap range with the inner wall of the brush head housing 110. This small gap range (0.05~0.2mm, 0.05~0.3mm) ensures that the distance between the transmission gear 1301 and the inner wall of the brush head housing 110 is as small as possible, thereby maximizing the utilization of internal space. This allows more space to be used to accommodate other key components, such as the drive shaft 1302 and the elastic seal 114, improving the overall compactness of the design. Furthermore, by optimizing the layout, the integration of all brush head mounting components can be improved, enabling each component to work more closely together and improving overall performance. In addition, the smaller gap design can reduce the amount of material used, thereby reducing the weight of the brush head and reducing the burden on the user during use. Moreover, the appropriate gap range provides greater design flexibility, allowing for fine-tuning under different design requirements to ensure optimal performance and space utilization.

[0085] Preferably, the number of brush mounting parts 111 that are connected to the transmission gear 1301 ranges from 1 to 2. For example... Figure 8 As shown, Figure 8 The number of brush mounting parts 111 connected to the transmission gear 1301 in the middle transmission is 1.

[0086] Preferably, each bristle mount 111 is drivenly connected to at least two adjacent bristle mounts 111.

[0087] Preferably, the number of any brush mounting component 111 that is connected to adjacent brush mounting components 111 ranges from 2 to 4.

[0088] Optional, Figure 8In one embodiment, one bristle mounting component 111 is drivenly connected to the transmission gear 1301. In other embodiments, the number of bristle mounting components 111 drivenly connected to the transmission gear 1301 is at most two. Furthermore, each bristle mounting component 111 is drivenly connected to two or four adjacent bristle mounting components 111, and the number of any bristle mounting component 111 drivenly connected to adjacent bristle mounting components 111 ranges from 2 to 4. One bristle mounting component 111 closest to the transmission gear 1301 is drivenly connected to the transmission gear 1301. The design concept is that the portion of the brush head housing 110 used for mounting the bristle mounting components 111 is designed as an elongated structure along the first direction. This structure allows for a maximum of two bristle mounting components 111 drivenly connected to the transmission gear 1301 within a certain width range. Therefore, the design can be tailored to the structure of the brush head housing 110, and according to the attached... Figure 8 As shown, the bristle mounting components 111 are designed in three rows along the third direction, so that any one of the bristle mounting components 111 in the central row can be connected to one or two of the other two rows, thereby realizing that each bristle mounting component 111 is connected to two or four adjacent bristle mounting components 111, maximizing the use of internal space.

[0089] Understandably, the outer diameter L1 of the elastic seal 114 determines its fit with the first abutment surface 1202 and the second abutment surface 1203. A suitable outer diameter L1 ensures that the elastic seal 114 can fit tightly against the abutment surface after installation, preventing liquid or gas leakage. According to the above scheme, optionally, in this embodiment, the outer diameter L1 of the elastic seal 114 is selected as 4.2mm, which is located between the lower limit and the upper limit. This can provide a better sealing effect. This value range limits the maximum and minimum allowable dimensions, thereby avoiding excessive compression that could cause deformation or damage to the elastic seal 114. Furthermore, the inner diameter L of the elastic seal 114... The inner diameter L2 determines its fit with the drive shaft 1302 or the bristle bundle 112. A suitable inner diameter L2 ensures that the elastic seal 114 will not loosen after installation, while also avoiding excessive tightness that could lead to installation difficulties or wear. In this embodiment, a middle value of 2.3mm is chosen to balance the sealing effect and installation convenience. In addition, the thickness L3 of the elastic seal 114 affects its elasticity and compression capacity. A thicker elastic seal 114 can provide a better sealing effect, but it will also increase the installation difficulty and cost. In this embodiment, a thickness of 0.45mm, close to the upper limit of the thickness L3 of the elastic seal 114, can provide a good sealing effect while maintaining reasonable installation convenience and cost.

[0090] And, please refer to Figure 7-8As shown, the interference fit between the bristle mounting component 111 and the brush head housing 110 at least at one end is achieved by precisely controlling the dimensional tolerances of both. During manufacturing, it is necessary to ensure that the outer diameter of the bristle mounting component 111 is slightly larger than the inner diameter of the bristle through-hole 110a to ensure sufficient tightness during assembly without damaging the component due to excessive pressure. Specifically, the diameter L4 of the bristle through-hole 110a determines the installation and fixation of the bristle bundle 112. A suitable diameter L4 ensures that the bristle bundle 112 is firmly fixed to the brush head without being too tight and damaging the bristles. Optionally, in this embodiment, an intermediate value of 2.4 is selected. mm can balance the fixing effect of the bristle bundle 112 and the ease of installation; in addition, the distance L5 between the first abutment surface 1202 and the second abutment surface 1203 determines the compression amount of the elastic seal 114. A suitable distance L5 can ensure that the elastic seal 114 can be fully compressed after installation, providing a good sealing effect, while avoiding excessive compression that could damage the elastic seal 114. In this embodiment, a value close to the minimum size of 0.2 mm is selected to provide the best sealing effect and reliability.

[0091] Preferably, the elastic seal 114 is made of silicone. Silicone has high elasticity and can quickly return to its original shape after being compressed, ensuring a long-term sealing effect. The silicone elastic seal 114 can provide a reliable seal between the first contact surface 1202 and the second contact surface 1203, and can maintain good sealing performance even after multiple uses.

[0092] Please refer to Figure 2 , 4 and Figure 6 As shown, preferably, the end of the brush head housing 110 away from the bristle bundle 112 is provided with a second limiting groove 110c. The second limiting groove 110c is provided with at least two sealing grooves 111a, of which at least one sealing groove 111a is provided with a waterproof ring 1121. The drive shaft 1302 passes through the waterproof ring 1121 located in the sealing groove 111a and is installed in the second limiting groove 110c. It can be understood that the second limiting groove 110c is used to install the waterproof ring 1121 to ensure the sealing effect between the drive shaft 1302 and the brush head housing 110, prevent liquid or gas from entering the interior, protect the transmission component 113 from contamination, prevent liquid from flowing into the connection between the brush head housing 110 and the handle housing of the electric toothbrush 200, and also prevent water from entering the handle housing from the brush head housing 110.

[0093] Example 2: This example provides an electric toothbrush 200. Please refer to... Figure 9-10As shown, it includes the toothbrush head 100 as described in Embodiment 1 above, and also includes a toothbrush handle 211. The toothbrush handle includes a housing 2111, a drive motor 2112, and a power supply unit 2113. The drive motor 212 is electrically connected to the power supply unit 213, and the power supply unit 213 provides current to the drive motor 212. The toothbrush head 100 is mounted on one end of the housing 2111, and the drive motor 212 is located on the end of the housing 2111 near the toothbrush head 100, so that the drive shaft 1302 on the toothbrush head 100 can be connected to the drive motor 212. The drive motor 212 is also connected to the transmission assembly, which transmits the power of the drive motor 212 to the bristle mounting member 111, so that the bristle mounting member 111 can drive the bristle bundle 112 to rotate.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A toothbrush head characterized by, The toothbrush head comprises: a brush head shell; a plurality of bristle mounting members mounted in the brush head shell; a plurality of bristle bundles, each of which is mounted on a bristle mounting member and protrudes out of the outer surface of the brush head shell; a transmission assembly at least partially mounted in the brush head shell, each of the bristle mounting members being in driving connection with the transmission assembly so as to be rotatable and to drive each of the bristle bundles to rotate around the respective central axis; wherein, during the operation of the toothbrush head, the rotation speed of each of the bristle bundles is 1-30 revolutions per second, and the torque of the plurality of bristle bundles is 0-3 kgf·cm.

2. The toothbrush head of claim 1, wherein: During the operation of the toothbrush head, the rotation speed of each of the bristle bundles is 6-20 revolutions per second.

3. The toothbrush head of claim 1, wherein: During the operation of the toothbrush head, the rotation speed of each of the bristle bundles is 2-10 revolutions per second.

4. The toothbrush head of claim 1, wherein: The thickness of the side wall of the brush head shell is in the range of 0.5-1.5 mm.

5. A toothbrush head characterized by, The toothbrush head comprises: a brush head shell; a plurality of bristle mounting members mounted in the brush head shell; a plurality of bristle bundles, each of which is mounted on a bristle mounting member and protrudes out of the outer surface of the brush head shell; a transmission assembly at least partially mounted in the brush head shell, each of the bristle mounting members being in driving connection with the transmission assembly so as to be rotatable and to drive each of the bristle bundles to rotate around the respective central axis; wherein, each of the bristle mounting members is in interference fit with the brush head shell towards one end of the brush head shell.

6. The toothbrush head of claim 5, wherein: The brush head shell is provided with a bristle through hole and a mounting groove opposite to the bristle through hole, the bristle mounting member is mounted in the mounting groove, and the bristle bundle protrudes out of the outer surface of the brush head shell from the bristle through hole.

7. The toothbrush head of claim 6, wherein: The brush head shell is further provided with a limiting clamping member, the limiting clamping member is arranged on the circumferential side of the mounting groove, one end of the bristle mounting member towards the brush head shell is provided with an interference protrusion, the interference protrusion is in interference fit with at least a part of the limiting clamping member, and / or at least a part of the interference protrusion is in interference fit with the limiting clamping member.

8. The toothbrush head of claim 7, wherein: The limiting clamping member is provided with a first limiting groove, the interference protrusion extends into the first limiting groove and abuts against the bottom of the first limiting groove.

9. The toothbrush head of claim 8, wherein: The interference protrusion abutting against one side of the first limiting groove is arranged to be inclined and forms an inclined included angle, the angle of the inclined included angle is in the range of 30-60°.

10. The toothbrush head of claim 5, wherein: The brush head shell comprises a brush head upper shell and a brush head lower shell mounted in cooperation with the brush head upper shell, one side of the brush head upper shell close to the brush head lower shell is provided with a clamping groove, one side of the brush head lower shell close to the brush head upper shell is provided with a clamping part, and the brush head lower shell is assembled and connected with the brush head upper shell by clamping the clamping groove through the clamping part.

11. The toothbrush head of claim 5, wherein: The number of the bristle mounting members is set to be 7-16.

12. An electric toothbrush, characterized by The toothbrush head comprises: a brush head shell; a plurality of bristle mounting members mounted in the brush head shell; a plurality of bristle bundles, each of which is mounted on a bristle mounting member and protrudes out of the outer surface of the brush head shell; a transmission assembly at least partially mounted in the brush head shell, each of the bristle mounting members being in driving connection with the transmission assembly so as to be rotatable and to drive each of the bristle bundles to rotate around the respective central axis; wherein, each of the bristle mounting members is in interference fit with the brush head shell towards one end of the brush head shell. The toothbrush head further comprises: a toothbrush handle, the toothbrush head being mounted at one end of the toothbrush handle; a driving motor mounted in the toothbrush handle; wherein, the driving motor is in driving connection with the transmission assembly, and the transmission assembly transmits the power of the driving motor to the bristle mounting member so as to drive the bristle mounting member to rotate the bristle bundle.

Images