Toothbrush head and electric toothbrush

Abstract

The utility model relates to the technical field of brushes, and provides a toothbrush head, which comprises a brush head shell, a plurality of bristle bundles; the bristle mounting parts are mounted in the brush head shell, and each bristle mounting part is provided with a bristle bundle; at least part of the transmission assembly is installed in the brush head shell, each bristle installation piece is in transmission connection with the transmission assembly, and the transmission assembly drives the bristle bundles installed on the bristle installation pieces to rotate around respective center shafts when driving the bristle installation pieces to rotate; a plurality of elastic sealing elements; wherein an elastic sealing piece is arranged between each bristle mounting piece and the inner wall of the brush head shell, and the bristle bundles penetrate through the elastic sealing pieces and extend out of the outer surface of the brush head shell. According to the toothbrush head, liquid such as water and toothpaste is effectively prevented from permeating into the toothbrush head shell, so that the service life of the toothbrush head is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of brushware, in particular to a toothbrush head and electric toothbrush. BACKGROUND

[0002] The existing electric toothbrush basically adopts the mode of ultrasonic wave or swing brush head. The electric toothbrush adopting ultrasonic wave cannot remove stubborn stains completely because the toothbrush head does not rub the teeth. The electric toothbrush adopting swing brush head cannot clean completely because the swing speed is not fast enough and the swing amplitude is limited.

[0003] Therefore, according to the market demand, the developer develops the toothbrush head with multiple brush bundles rotating independently, which can obtain good cleaning effect by driving each brush bundle to rotate for toothbrushing. At present, the toothbrush head with this structure needs to make the brush bundle extend outward from the inside of the brush head shell. During the rotation of the multiple brush bundles, liquid in the oral cavity and other places may flow into the brush head shell along the brush bundle, which can wet the transmission assembly of the brush head shell, thereby reducing the rotation speed and use effect of the brush bundle and easily causing damage to the toothbrush head. SUMMARY

[0004] In view of the defects in the prior art, the utility model aims at providing a toothbrush head capable of preventing water from entering the brush head shell and having good sealing performance and an electric toothbrush applying the toothbrush head.

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

[0006] A toothbrush head comprises:

[0007] A brush head shell;

[0008] Multiple brush bundles;

[0009] Multiple brush mounting members mounted in the brush head shell, each of which is mounted with a brush bundle;

[0010] A transmission assembly mounted at least partially in the brush head shell, each of the brush mounting members being in transmission connection with the transmission assembly, and the transmission assembly driving the brush mounting members to rotate and driving the brush bundle mounted on the brush mounting member to rotate around the respective center axis;

[0011] Multiple elastic sealing members;

[0012] Each of the brush mounting members and the inner wall of the brush head shell is provided with an elastic sealing member, and the brush bundle extends out of the outer surface of the brush head shell through the elastic sealing member.

[0013] In an embodiment, the brush head shell is provided with a bristle opening and a mounting slot opposite to the bristle opening, the bristle mounting member is mounted in the mounting slot, the elastic sealing member is arranged at one side of the bristle opening, and the bristle bundle extends out of the outer surface of the brush head shell from the bristle opening through the elastic sealing member.

[0014] In an embodiment, the brush head shell is provided with a bristle opening, the first abutting surface is arranged at the top of the bristle mounting member towards the bristle opening, the second abutting surface is arranged on the brush head shell at the circumferential side of the bristle opening opposite to the first abutting surface, and the elastic sealing member abuts against the first abutting surface and the second abutting surface respectively.

[0015] In an embodiment,

[0016] The first abutting surface is arranged as a flat surface or a concave curved surface.

[0017] The second abutting surface is arranged as a flat surface or a concave curved surface.

[0018] In an embodiment, the transmission assembly comprises a transmission gear and a transmission shaft, the transmission shaft is mounted at one end of the toothbrush head away from the bristle mounting member, and the transmission gear is mounted between the bristle mounting member and the transmission shaft and is in transmission connection with the bristle mounting member and the transmission shaft.

[0019] The transmission shaft is rotatable about a first axis along a first direction, and the transmission shaft can drive the transmission gear to rotate about a second axis along a second direction.

[0020] The first direction is perpendicular to the second direction.

[0021] In an embodiment, the inner diameter of the elastic sealing member is greater than the diameter of the bristle opening.

[0022] In an embodiment, the thickness of the elastic sealing member ranges between 0.3-0.5mm.

[0023] In an embodiment, the inner diameter of the elastic sealing member ranges between 2.0-3.4mm, and the diameter of the bristle opening ranges between 1.8-3mm.

[0024] In an embodiment, the outer diameter of the elastic sealing member ranges between 3.9-5.0mm, and the distance between the first abutting surface and the second abutting surface ranges between 0.2-0.4mm.

[0025] In an embodiment, the rotational speed of the plurality of bristle bundles is 1-30 revolutions per second.

[0026] In an embodiment, the moment of the plurality of bristle bundles is between 0-3kg·cm.

[0027] The present embodiment also provides an electric toothbrush, which comprises the toothbrush head as claimed in any one of the above embodiments, and further comprises:

[0028] A toothbrush handle, comprising a shell and a driving motor and a power supply element, the toothbrush head is assembled to one end of the shell, the driving motor and the power supply element are installed in the shell, and the driving motor is located at one end of the shell close to the toothbrush head, and the power supply element is used to provide current to the driving motor;

[0029] Wherein, the driving motor is in transmission connection with the transmission assembly, and the transmission assembly transmits the power of the driving motor to the bristle mounting element, so that the bristle mounting element can drive the bristle bundle to rotate.

[0030] The beneficial effects of the present utility model are that the elastic sealing element is compressed during the pressing process, can fill the tiny gap between the bristle mounting element and the brush head shell, form a more compact sealing interface, effectively prevent water and toothpaste and other liquids from penetrating into the brush head shell during brushing, ensure the sealing between the bristle mounting element and the brush head shell, protect the internal electronic components and transmission assembly, reduce the corrosion and damage risk of internal components, thereby prolong the service life of the toothbrush head, reduce the risk of electrical failure, and improve the use safety of the product. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a perspective view of one of the embodiments of the toothbrush head of the present utility model;

[0032] Figure 2 It is a structural schematic view of one of the embodiments of the toothbrush head of the present utility model;

[0033] Figure 3 It is a brush head shell schematic view of one of the embodiments of the toothbrush head of the present utility model;

[0034] Figure 4 It is a sectional view of one of the embodiments of the toothbrush head of the present utility model;

[0035] Figure 5 It is Figure 4 It is a local enlarged view of A in the figure;

[0036] Figure 6 It is a sectional view of another embodiment of the toothbrush head of the present utility model;

[0037] Figure 7 It is Figure 6 It is a local enlarged view of B in the figure;

[0038] Figure 8The utility model discloses a toothbrush head one of the embodiment's overhead structure schematic diagram of the utility model discloses a electric toothbrush one of the embodiment's perspective view.

[0039] Figure 9 The utility model discloses a electric toothbrush one of the embodiment's perspective view.

[0040] Figure 10 The utility model discloses a electric toothbrush one of the embodiment's exploded schematic view.

[0041] Reference signs:

[0042] 100, toothbrush head;110, brush head shell;111, bristle mounting piece;112, bristle bundle;113, transmission assembly;114, elastic sealing piece;110a, bristle through hole;110b, mounting groove;110c, second limiting groove;111a, sealing groove;1121, waterproof ring;

[0043] 1101, brush head upper shell;1102, brush head lower shell;1103, ultrasonic line;1201, clamping part;120a, clamping groove;1202, first abutting surface;1203, second abutting surface;1204, interference convex part;1205, limiting clamping piece;120b, first limiting groove;120c, inclined included angle;

[0044] 1102, transmission array;1301, transmission gear;1302, transmission shaft;130a, first axis;130b, second axis;

[0045] 200, electric toothbrush;211, toothbrush handle;212, driving motor;213, power supply piece;a1, interference amount. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0047] In addition, the terms "first", "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0048] For the convenience of describing the first direction, the second direction and the third direction in the embodiments of the present application, the first direction is the left-right direction in the drawings, the second direction is the up-down direction in the drawings, and the third direction is the front-rear direction in the drawings. Among them, the direction of the x-axis arrow is the "right" direction in the following text, the direction of the y-axis arrow is the "up" direction in the following text, and the direction of the z-axis arrow is the "front or rear" direction in the following text. In the actual application of the present application, it is not limited to this.

[0049] Embodiment 1: Please refer to Figures 1-8 As shown in the drawings, the present embodiment provides a toothbrush head 100, which comprises a brush head shell 110, a bristle mounting member 111, a bristle bundle 112 and a transmission assembly 113; wherein the bristle mounting member 111 is mounted in the brush head shell 110, the bristle bundle 112 is mounted on each bristle mounting member 111 and protrudes out of the outer surface of the brush head shell 110; at least part of the transmission assembly 113 is mounted in the brush head shell 110, each bristle mounting member 111 is in driving connection with the adjacent bristle mounting member 111 and / or the transmission assembly 113 so as to be rotatable, and can drive each bristle bundle 112 to rotate around the respective center axis.

[0050] Among them, please refer to Figure 2 , 6 , 8, at least part of the transmission assembly 113 is arranged in the brush head shell 110 along the extension direction of the brush head shell 110 and forms a transmission array 1102, and the inner side wall of the brush head shell 110 relative to the transmission array 1102 and / or the bristle mounting member 111 is arranged with a gap between the transmission array 1102 and / or the bristle mounting member 111; it can be understood that by arranging the transmission assembly 113 along the extension direction of the brush head shell 110, the transmission array 1102 is formed, the longitudinal space inside the brush head shell 110 can be maximally utilized, the spacing between each transmission assembly 113 is minimized, and by driving connection between each bristle mounting member 111 and the adjacent bristle mounting member 111 and / or the transmission assembly 113, the limited volume can be fully utilized to accommodate the bristle mounting member 111, which not only realizes the transmission of multiple bristle mounting members 111 in the brush head shell 110, but also reduces unnecessary space waste, is conducive to the optimization of the internal structure of the brush head, and improves the user's experience.

[0051] According to the above scheme, the rotation speed of the plurality of bristle bundles 112 is 1-30 revolutions per second. It can be understood that the transmission effect of the transmission assembly 113 is set by controlling the power of the driving motor, so that the transmission of the transmission assembly 113 to the bristle mounting member 111 can meet the rotation speed range of 1-30 revolutions per second, and the bristle mounting member 111 drives the bristle bundle 112, so that the rotation speed of the bristle bundle 112 meets the rotation speed range of 1-30 revolutions per second. This rotation speed range is based on in-depth research on the oral environment and the characteristics of the tooth surface of the human body, which ensures that the bristle bundle 112 can provide sufficient mechanical friction during cleaning and will not cause damage to the teeth and gums. Within this rotation speed range, these movements can effectively penetrate the tooth surface and the interdental space to remove plaque and food residues attached to the tooth surface, thereby providing deep cleaning and thoroughly removing plaque.

[0052] According to the above scheme, the thickness of the single bristle planted by the bristle bundle 112 in the embodiment is between 0.05mm and 0.18mm.

[0053] Preferably, in some embodiments, the rotation speed of the plurality of bristle bundles 112 is 6-20 revolutions per second, which is suitable for teenagers and adults with sensitive dentin after tooth replacement, so as to meet the safe, efficient and comfortable tooth cleaning needs of this group of users.

[0054] Preferably, in some other embodiments, the rotation speed of the plurality of bristle bundles 112 is 2-10 revolutions per second, which is suitable for children, so as to meet the safe, efficient and comfortable tooth cleaning needs of this group of users.

[0055] Preferably, the torque of the plurality of bristle bundles 112 is between 0-3kg·cm; specifically, the torque generated by each bristle bundle 112 during work is in the range of 0-3kg·cm, which ensures that the bristle bundle 112 can provide sufficient cleaning force when cleaning teeth without causing excessive pressure on the teeth and gums; and further, in order to achieve this torque range, the thickness range of the shell wall of the brush head shell is limited, and the root of the bristle bundle 112 is fixed at the bottom of the bristle mounting member 111, so that the bristle mounting member 111 can convert the transmission output of the transmission assembly 113 into the rotational motion of the bristle bundle 112, thereby generating a stable torque on each bristle bundle 112. In this way, the electric toothbrush can ensure cleaning effect while providing a comfortable user experience.

[0056] When the bristle bundle is greater than a certain torque, the rotation speed of the bristle bundle will be reduced or stopped. For example, the bristle bundle is set so that when the torque of the bristle bundle is greater than 55 g·cm, the rotation speed of the bristle bundle will gradually decrease to 0. It can be understood that the designer can select the protection stall torque in the range of 200 g·cm to 1200 g·cm according to different regions and different ages of customers. This part is planned in the applet, and the customer can set it by himself. Optionally, in another design, the customer is presented with a force bar instead of such direct parameters, which is not limited here.

[0057] Please refer to Figure 8 Preferably, the shell wall thickness L8 of the brush head shell 110 is designed to be in the range of 0.5-1.5 mm, that is, the inner wall thickness L8 of the side of the brush head shell 110 relative to the brush bristle mounting member 111 and / or the transmission assembly 113 is in the range of 0.5-1.5 mm, preferably 0.8 mm to 1.2 mm.

[0058] For example, the shell wall thickness L8 of the brush head shell 110 in this embodiment is 1.0 mm, which is a compromise between support strength, weight, and internal space utilization, so as to reduce the volume of the brush head shell, save as much space as possible under the structure of maintaining a certain support strength, and ensure that the size of the brush bristle mounting member 111 matches the internal space of the brush head shell 110 to avoid overcrowding or emptiness.

[0059] According to the above scheme, it can be understood that, please refer to Figures 1-2 and Figure 8 As shown in the drawings, the brush bristle mounting member 111 in this embodiment is provided in a plurality, and the number of the brush bristle bundles 112 corresponds to the number of the brush bristle mounting members 111, so that each brush bristle mounting member 111 is provided with a brush bristle bundle 112, and the plurality of brush bristle bundles 112 are used to clean the teeth, and the transmission assembly 113 is used to drive each brush bristle mounting member 111 to rotate, so as to drive the brush bristle bundle 112 to rotate and clean the teeth. In the design of the toothbrush head 100, the connection mechanism between the brush bristle mounting member 111 and the transmission assembly 113 is that each brush bristle mounting member 111 has a transmission function, the transmission assembly 113 can drive the brush bristle mounting member 111 in contact with the transmission assembly 113 to move, and the brush bristle mounting member 111 can drive the remaining brush bristle mounting members 111 in contact with the brush bristle mounting member 111 to move when the brush bristle mounting member 111 moves. Specifically, the side of the brush bristle mounting member 111 has a structure that meshes with the transmission assembly 113, which means that, please refer to Figures 9-10As shown, when the electric toothbrush 200 is started, the power generated by the motor is transmitted to a series of gears and transmission shaft 1302 of the transmission assembly 113, and then to each bristle holder 111, so that it can rotate around its own axis. Since each bristle holder 111 is independent and associated with the transmission assembly 113, it can drive the respective bristle bundle 112 to rotate.

[0060] According to the above scheme, in some embodiments, each bristle holder 111 is at least towards one end of the brush head shell 110 with the brush head shell 110 interference fit; in particular, please refer to Figures 4-5 As shown, each bristle holder 111 is designed at least at one end to match the shape of the inner wall of the brush head shell 110, when the bristle holder 111 is installed on the brush head shell 110, the bristle holder 111 will be slightly pressed, so as to form a tight connection with the inner wall of the brush head shell 110, thereby maintaining the sealing effect of the bristle bundle 112 from the brush head shell 110.

[0061] According to the above scheme, in another embodiment, the toothbrush head 100 further comprises a plurality of elastic seals 114, please refer to Figures 6-7 As shown, each elastic seal 114 is installed between a corresponding bristle holder 111 and the inner wall of the brush head shell 110, to ensure effective sealing during the pressing process, and any of the bristle bundles 112 passes through the elastic seal 114 and extends out of the outer surface of the brush head shell 110; it can be understood that the elastic seal 114 is compressed during the pressing process, which can fill the small gap between the bristle holder 111 and the brush head shell 110, forming a more tightly sealed interface, effectively preventing water and toothpaste and other liquids from penetrating into the brush head during brushing, protecting the internal electronic components and transmission assembly 113.

[0062] It can be understood that the elastic seal 114 and the interference fit can be used simultaneously in the toothbrush head 100 to maximize the sealing effect; but the elastic seal 114 or the interference fit alone can also be used, and the present application does not limit it.

[0063] Please refer to Figures 1-3 and Figures 6-8As shown, preferably, the brush head shell 110 is provided with a bristle through hole 110a and a mounting groove 110b opposite to the bristle through hole 110a, the elastic sealing member 114 is arranged at one side of the bristle through hole 110a, the bristle mounting member 111 is mounted in the mounting groove 110b, and the bristle bundle 112 extends out of the outer surface of the brush head shell 110 from the bristle through hole 110a; Specifically, the outer surface of the brush head shell 110 is provided with a plurality of bristle through holes 110a communicating with the inside, these through holes are usually circular or oval, and the diameter is slightly larger than the diameter of the bristle bundle 112, so as to ensure that the bristle bundle 112 can smoothly pass through and extend out of the outer surface of the brush head shell 110; In the inside of the brush head shell 110, a mounting groove 110b is arranged 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, so as to ensure that the bristle mounting member 111 can be accurately embedded therein, the mounting groove 110b is designed to limit the installation of the bristle mounting member 111, so as to provide sufficient space and stability, prevent the bristle mounting member 111 from loosening or falling off during use, and the inner wall of the mounting groove 110b is usually precisely machined to ensure smooth surface and accurate size, so as to realize close cooperation with the bristle mounting member 111.

[0064] Please refer to Figures 6-8 As shown, preferably, the top of the bristle mounting member 111 on the side facing the bristle through hole 110a is provided with a first abutting surface 1202, the brush head shell 110 on the circumferential side of the bristle through hole 110a is provided with a second abutting surface 1203 opposite to the first abutting surface 1202, and the elastic sealing member 114 abuts against the first abutting surface 1202 and the second abutting surface 1203 respectively when the bristle mounting member 111 is mounted in the mounting groove 110b; It can be understood that the elastic sealing member 114 abuts against the first abutting surface 1202 and the second abutting surface 1203 respectively, so that the first abutting surface 1202 and the second abutting surface 1203 generate pressure on the upper and lower sides of the elastic sealing member 114, so that the elastic sealing member 114 is extruded and deformed, and the sealing effect is achieved; And in this embodiment, the first abutting surface 1202 and the second abutting surface 1203 are both flat surfaces, when the elastic sealing member 114 is mounted between the two abutting surfaces, the pressure it bears will be more evenly distributed on the elastic sealing member 114, which helps to prolong the service life of the elastic sealing member 114; And in other embodiments, the first abutting surface 1202 and the second abutting surface 1203 can also be designed as arc surfaces or curved surfaces to further improve the sealing performance, because the arc surfaces or curved surfaces can better adapt to the shape of the elastic sealing member 114, increase the contact area, and thus improve the sealing performance and reduce the possibility of leakage.

[0065] Please refer to Figures 4-5As shown, preferably, the brush head shell 110 is further provided with a limiting clamping piece 1205, which is arranged on the circumferential side of the installation groove 110b. The end of the bristle installation piece 111 towards the brush head shell 110 is provided with an interference convex part 1204, which is interference-fitted with at least a part of the limiting clamping piece 1205, and / or at least a part of the interference convex part 1204 is interference-fitted with the limiting clamping piece 1205. It can be understood that, through precise size control and material selection, this design ensures the stability and sealing of the bristle installation piece 111 in the installation groove 110b. This interference fit not only prevents the bristle installation piece 111 from loosening and falling off during use, but also effectively blocks the flow of liquid along the bristle bundle 112 into the interior of the brush head shell 110, protecting the internal electronic components and transmission assembly 113. Through this design, the brush head of the electric toothbrush 200 can not only realize the independent rotation of each bristle bundle 112 to improve the cleaning effect, but also ensure the stability and reliability after long-term use, prolong the service life of the product, and improve the user experience.

[0066] In the above scheme, preferably, the interference amount a1 of the interference fit between the limiting clamping piece 1205 and the interference convex part 1204 is in the range of 20% to 50%; alternatively, at least a part of the interference convex part 1204 is interference-fitted with the limiting clamping piece 1205, and the interference amount a1 generated by the part of the interference convex part 1204 interference-fitted with the limiting clamping piece 1205 is 40%. It can be understood that the interference amount a1 of 40% can ensure that the bristle installation piece 111 and the limiting clamping piece 1205 form very close contact, effectively preventing the flow of liquid along the bristle bundle 112 into the interior of the brush head shell 110. Compared with a lower interference amount a1, the interference amount a1 of 40% provides stronger sealing effect and reduces the risk of liquid leakage; further, compared with a higher interference amount a1, the interference amount a1 of 40% provides sufficient fixing force while not causing excessive stress on the material, thereby avoiding excessive deformation or damage of the material.

[0067] Please refer to Figures 4-5 As shown, preferably, the limiting clamping piece 1205 is provided with a first limiting groove 120b, and the interference convex part 1204 extends into the first limiting groove 120b and abuts against the bottom of the first limiting groove 120b; alternatively, in other embodiments, the first limiting groove 120b can be replaced by other structures and form interference fit with the interference convex part 1204.

[0068] Please refer to Figures 4-5As shown, preferably, the interference convex portion 1204 is arranged obliquely against one side of the first limiting groove 120b and forms an oblique included angle 120c. It can be understood that by arranging the interference convex portion 1204 obliquely against one side of the first limiting groove 120b, the bristle mounting member 111 can be smoothly drawn into the first limiting groove 120b to achieve installation, while also reducing the frictional resistance in the assembly process, ensuring the smooth implementation of the interference fit.

[0069] Please refer to Figures 4-5 As shown, preferably, the angle of the oblique included angle 120c is in the range of 30-60°.

[0070] Optionally, the angle of the oblique included angle 120c is set to 30°.

[0071] Please refer to Figure 3 As shown, preferably, the brush head shell 110 includes a brush head upper shell 1101 and a brush head lower shell 1102 installed in cooperation with the brush head upper shell 1101. The brush head upper shell 1101 is provided with a clamping groove 120a on the side close to the brush head lower shell 1102. The brush head lower shell 1102 is provided with a clamping portion 1201 on the side close to the brush head upper shell 1101. The brush head lower shell 1102 clamps the clamping groove 120a through the clamping portion 1201 to assemble and connect with the brush head upper shell 1101. It can be understood that the brush head upper shell 1101 is the upper half of the toothbrush head 100, which is designed with a bristle passage 110a. The brush head lower shell 1102 is the lower half of the brush head, which usually contains the installation space of the transmission assembly 113 and the design structure of the installation groove 110b. In addition, the edge of the clamping portion 1201 can be designed with a slight chamfer to help easier alignment and insertion during assembly. The design of the clamping portion 1201 and the clamping groove 120a makes the assembly process of the brush head upper shell 1101 and the brush head lower shell 1102 simple and fast, reducing the assembly time and cost.

[0072] 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 is provided with an ultrasonic line 1103 near the side edge of the other, and the ultrasonic line 1103 is fused at the joint of the brush head upper shell 1101 and the brush head lower shell 1102 when the brush head upper shell 1101 is assembled with the brush head lower shell 1102; Specifically, the ultrasonic line 1103 is provided on the clamping portion 1201, and the ultrasonic line 1103 is fused between the clamping portion 1201 and the clamping groove 120a when the clamping portion 1201 is clamped in the clamping groove 120a; It can be understood that the ultrasonic line is usually made of heat-melting 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 clamping portion 1201 and the clamping groove 120a. The heat generated by the high-frequency vibration makes the ultrasonic line melt rapidly, forming a molten state. During the ultrasonic welding process, the clamping portion 1201 of the brush head upper shell 1101 is pressed into the clamping groove 120a of the brush head lower shell 1102, ensuring that the ultrasonic line is completely melted when contacting the clamping groove 120a, and solidified after cooling, forming a firm sealing layer, ensuring the tight connection between the brush head upper shell 1101 and the brush head lower shell 1102; It can be understood that the ultrasonic line formed by ultrasonic welding can effectively prevent liquid and dirt from entering the inside of the toothbrush head 100, protect the internal transmission assembly 113 and electronic components, and the ultrasonic line has high strength and durability after solidification, which can still maintain good sealing effect after long-term use, effectively preventing water and toothpaste and other liquids from dripping on the brush head shell during brushing and then seeping into the inside of the brush head shell through the gap, ensuring the sealing between the brush head upper shell and the brush head lower shell, protecting the internal electronic components and transmission assembly, reducing the corrosion and damage risk of internal components, thereby prolonging the service life of the toothbrush head and reducing the risk of electrical failure, improving the use safety of the product.

[0073] Preferably, the ultrasonic line 1103 is provided on the outside of the clamping portion 1201; The purpose of designing this structure is that the ultrasonic line 1103 can be more easily processed, and being provided inside will make it difficult for the ultrasonic line to be touched by ultrasonic waves or other processing devices.

[0074] Optionally, the thickness L7 of the ultrasonic line 1103 is designed to be in the range of 0.2-0.5mm, which makes the thickness of the ultrasonic line 1103 thinner, so that the sealing between the brush head upper shell 1101 and the brush head lower shell 1102 can be achieved without occupying space, and the thickness L7 of the ultrasonic line 1103 in this range can provide sufficient anti-deformation ability to ensure that the toothbrush head 100 will not deform during use due to external pressure; And the thin thickness L7 of the ultrasonic line 1103 makes it more convenient during processing and installation, and can be easily embedded between the clamping portion 1201 and the clamping groove 120a, ensuring that there will be no excessive deformation or damage during the welding process.

[0075] Preferably, the number of bristle tufts 112 is set to be greater than or equal to 7, preferably 7-16, to ensure the efficiency and uniformity of the brush head when cleaning teeth; and the bristle tufts 112 are usually evenly distributed on the surface of the brush head to ensure that each bristle tuft 112 can cover different areas of the teeth, improving the cleaning effect; it can be understood that the increase in the number of bristle tufts 112 will result in an increase in the weight and volume of the brush head, and the number of bristle tufts 112 in this embodiment is designed to be 10, and the more the number of bristle tufts 112, the more the number of bristle mounting members 111, so that the volume of the bristle mounting member 111 and the transmission gear 1301 is reduced under the fixed installation space of the brush head shell 110, to ensure sufficient torque and rotational speed; and under this structure, in order to ensure the stability and efficiency of transmission, the number of teeth and the modulus of the transmission gear 1301 need to be optimized according to the number of bristle tufts 112, for example, the number of teeth of the transmission gear 1301 is between 9-30, and the modulus is between 0.12-0.4.

[0076] Please refer to Figures 1-3 and Figures 6-8 As shown in the drawings, preferably, the transmission assembly 113 includes a transmission gear 1301 and a transmission shaft 1302, the bristle mounting member 111 is installed at the end of the brush head shell 110 along the first direction, the transmission shaft 1302 is installed at the end of the brush head shell 110 away from the bristle mounting member 111 along the first direction, the transmission gear 1301 is in transmission connection with the bristle 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 provided on the toothbrush handle 211 to the transmission gear 1301, one of the transmission gears 1301 close to the bristle mounting member 111 is in transmission connection with one of the bristle mounting members 111, and one of the transmission gears 1301 close to the transmission shaft 1302 is in transmission connection with the transmission shaft 1302; further, the transmission gear 1301 is installed between the bristle mounting member and the transmission shaft 1302 along the first direction, and is arranged in the brush head shell 110 along the first direction, and rotates around the axis perpendicular to the center of each transmission gear 1301 along the second direction; further, the transmission shaft 1302 is rotatable around the first axis 130a along the first direction, and the transmission shaft 1302 can drive the transmission gear 1301 to rotate around the second axis 130b along the second direction; in addition, the outer side wall of the bristle mounting member 111 is provided with a transmission wall, and the transmission wall of any bristle mounting member 111 is in meshing connection 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 around the first axis 130a, it can drive the transmission gear 1301 to rotate around the second axis 130b through the meshing action of the transmission gear 1301, and this design of perpendicular axes makes the conversion of movement direction more flexible and efficient.

[0077] Preferably, the rotation speed range of the transmission gear is set to 3-20 rpm, which is designed to accurately detect and control the force, ensuring efficient cleaning of teeth and maximum protection of oral health during use. Specifically, through accurate force detection and control, the system can monitor the pressure change in real time during brushing, and when excessive force is detected, the system will automatically reduce the rotation speed or stop rotating to avoid damage to teeth and gums; further, when the brush head contacts sensitive areas in the mouth or detects abnormal conditions, the system will immediately stop rotating to prevent accidental injury; in addition, when the device operating temperature exceeds the safe range, it will automatically power off to ensure safe use, the handle is made of anti-slip material to ensure stable grip even in wet hands, reducing the risk of slipping; and the rotation speed range of 3-20 rpm can effectively remove plaque on the surface of teeth and gaps, especially for teenagers during the tooth replacement period, this design can deeply clean newly grown permanent teeth, prevent dental caries and periodontal disease, and the optimized transmission system and shock absorption design make the device almost silent during operation, providing a quiet and comfortable brushing experience. In addition, the bristles are made of soft material and are friendly to gums and baby teeth, reducing discomfort during brushing; in addition, users can choose different rotation speed modes according to their needs, including cleaning mode and comfort mode, to meet the needs of different tooth groups, and the intelligent system will automatically adjust the rotation speed according to the user's oral condition and brushing habits to ensure optimal results every time. It can be understood that the above beneficial effects can make the electric toothbrush using the toothbrush head with the above rotation speed suitable for teenagers, as children at this stage are in a critical period of tooth development and need special attention to oral hygiene. The rotation speed of 3-20 rpm ensures cleaning effectiveness while protecting newly grown permanent teeth and delicate gums; and for tooth-sensitive adults, this design can provide gentle and effective cleaning, reducing discomfort during brushing while ensuring oral health.

[0078] Please refer to Figure 2 and Figure 4 According to the above scheme, it can be understood that part of the transmission assembly 113 in the embodiment is arranged on the inner side of the toothbrush head 100. Specifically, the transmission assembly 113 includes a transmission gear 1301 and a transmission shaft 1302. The transmission gear 1301 is arranged inside the toothbrush head 100, and one end of the transmission shaft 1302 is arranged inside the brush head shell 110, and the other end is connected to the driving motor 212 inside the toothbrush handle 211, thereby extending to the outside of the brush head shell 110. In other embodiments, the transmission assembly 113 can also be designed to be entirely arranged inside the brush head shell 110 and driven by other transmission structures.

[0079] Preferably, the gap range between the transmission gear 1301 and the inner side wall of the brush head shell 110 in the first direction and the third direction is between 0.05-0.2 mm.

[0080] Preferably, the gap between the bristle mounting member 111 and the inner side wall of the brush head housing 110 in the first direction and the third direction is between 0.05 and 0.3 mm.

[0081] 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 bore 110a is between 1.8 and 3 mm, and the distance L5 between the first abutting surface 1202 and the second abutting surface 1203 is between 0.2 and 0.4 mm.

[0082] According to the above scheme, it can be understood that the transmission gear 1301 and the bristle mounting member 111 have a small gap range with the inner wall of the brush head housing 110. The small gap range (0.05-0.2 mm, 0.05-0.3 mm) can ensure that the distance between the transmission gear 1301 and the inner side wall of the brush head housing 110 is as small as possible, thereby maximizing the utilization of the internal space. This makes more space available for accommodating other key components, such as the transmission shaft 1302, the elastic seal 114, etc., improving the compactness of the overall design; further, by optimizing the layout, the integration of all bristle mounting members can be improved, so that the components can work more closely together, improving the overall performance; in addition, the small 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; further, the appropriate gap range provides greater design flexibility, which can be fine-tuned under different design requirements to ensure optimal performance and space utilization.

[0083] Preferably, the number of bristle mounting members 111 transmissionally connected to the transmission gear 1301 is between 1 and 2. As shown in Figure 8 , the number of bristle mounting members 111 transmissionally connected to the transmission gear 1301 is 1. Figure 8

[0084] Preferably, each bristle mounting member 111 is transmissionally connected to at least two adjacent bristle mounting members 111.

[0085] Preferably, the number of adjacent bristle mounting members 111 to which any bristle mounting member 111 is transmissionally connected is between 2 and 4.

[0086] Optionally, Figure 8 ​In the embodiment, one bristle mounting member 111 is in transmission connection with the transmission gear 1301, and in other embodiments, the number of bristle mounting members 111 in transmission connection with the transmission gear 1301 is at most two; further, each bristle mounting member 111 is in transmission connection with two or four adjacent bristle mounting members 111, and the number of adjacent bristle mounting members 111 in transmission connection with any bristle mounting member 111 ranges from two to four, wherein one bristle mounting member 111 adjacent to the transmission gear 1301 is in transmission connection with the transmission gear 1301, the design concept is that the part of the brush head shell 110 for mounting the bristle mounting members 111 is designed as a long strip structure in the first direction, which makes the number of bristle mounting members 111 in transmission connection with the transmission gear 1301 at most two within a certain width range, thus the structure of the brush head shell 110 can be designed, and according to the description of the accompanying drawings, the bristle mounting members 111 are designed as three rows in the third direction, so that any one of the bristle mounting members 111 in the central row is in transmission connection with one or two of the other two rows, thereby achieving that each bristle mounting member 111 is in transmission connection with two or four adjacent bristle mounting members 111, and maximizing the use of internal space. Figure 8

[0087] It can be understood that the outer diameter L1 of the elastic seal 114 determines the fit between it and the first abutting surface 1202 and the second abutting surface 1203, and a suitable outer diameter L1 can ensure that the elastic seal 114 can tightly fit the abutting surface after installation to prevent liquid or gas leakage, according to the above scheme, the outer diameter L1 of the elastic seal 114 in the embodiment is selected as 4.2 mm, which is between the lower limit value and the upper limit value, which can provide better sealing effect, and the value range limits the maximum size and minimum size allowed, thereby avoiding excessive compression to cause deformation or damage of the elastic seal 114; further, the inner diameter L2 of the elastic seal 114 determines the fit between it and the transmission shaft 1302 or the bristle bundle 112, and a suitable inner diameter L2 can ensure that the elastic seal 114 will not be loose after installation, and also will not be too tight to cause installation difficulty or wear, and the middle value 2.3 mm in the embodiment can balance the sealing effect and installation convenience; in addition, the thickness L3 of the elastic seal 114 affects its elasticity and compression ability, and a thicker elastic seal 114 can provide better sealing effect, but will also increase the installation difficulty and cost, and the selection of 0.45 mm close to the upper limit value of the thickness L3 of the elastic seal 114 in the embodiment can provide good sealing effect, while maintaining reasonable installation convenience and cost.

[0088] Further, please refer to Figures 7-8 ​As shown, the interference fit between the bristle mounting member 111 and the brush head shell 110 at least towards one end of the brush head shell 110 is achieved by precisely controlling the dimensional tolerance of the two, during the manufacturing process, it is necessary to ensure that the outer diameter of the bristle mounting member 111 is slightly larger than the inner diameter of the bristle mounting hole 110a, so as to ensure that the assembly can achieve sufficient fastening degree, and will not damage the parts due to excessive pressure; Specifically, the diameter L4 of the bristle mounting hole 110a determines the installation and fixation of the bristle bundle 112, and the appropriate diameter L4 can ensure that the bristle bundle 112 is firmly fixed on the brush head, and will not be too tight to cause damage to the bristles, and optionally, the middle value 2.4 mm in this embodiment can balance the fixation effect and installation convenience of the bristle bundle 112; In addition, the distance L5 between the first abutting surface 1202 and the second abutting surface 1203 determines the compression amount of the elastic sealing member 114, and the appropriate distance L5 can ensure that the elastic sealing member 114 can be fully compressed after installation, providing good sealing effect, while avoiding excessive compression to cause damage to the elastic sealing member 114, and the value close to the minimum size 0.2 mm in this embodiment can provide the best sealing effect and reliability.

[0089] Preferably, the elastic sealing member 114 is made of silicone, which has high elasticity and can quickly recover to its original shape after being compressed, ensuring long-term sealing effect. The silicone elastic sealing member 114 can provide reliable sealing between the first abutting surface 1202 and the second abutting surface 1203, and can maintain good sealing performance even after multiple uses.

[0090] Please refer to Figure 2 , 4 and Figure 6 As shown, preferably, the end of the brush head shell 110 away from the bristle bundle 112 is provided with a second limiting groove 110c, and at least two sealing grooves 111a are arranged on the second limiting groove 110c, and at least one waterproof ring 1121 is arranged on the sealing groove 111a, and the transmission shaft 1302 is installed in the second limiting groove 110c after passing through the waterproof ring 1121 in the sealing groove 111a; 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 transmission shaft 1302 and the brush head shell 110, prevent liquid or gas from entering the inside, protect the transmission assembly 113 from being contaminated, avoid liquid flowing into the connection between the brush head shell 110 and the brush handle shell of the electric toothbrush 200, and also avoid water entering the brush handle shell from the brush head shell 110.

[0091] Embodiment 2: The present embodiment provides an electric toothbrush 200, please refer to Figures 9-10As shown, it comprises the toothbrush head 100 as in the foregoing embodiment 1, and further comprises: a toothbrush handle 211, which comprises a shell 2111, a driving motor 2112 and a power supply 2113, the driving motor 212 is electrically connected with the power supply 213, the driving motor 212 is provided with current through the power supply 213, the toothbrush head 100 is installed at one end of the shell 2111, the driving motor 212 is arranged at one end of the shell 2111 close to the toothbrush head 100, so as to facilitate the transmission shaft 1302 on the toothbrush head 100 to be connected on the driving motor 212, and the driving motor 212 is drivingly connected with the transmission assembly, the transmission assembly transmits power of the driving motor 212 to the bristle mounting piece 111, so that the bristle mounting piece 111 can drive the bristle bundle 112 to rotate.

[0092] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A toothbrush head characterized by, The toothbrush head comprises: a brush head shell; a plurality of bristle bundles; a plurality of bristle mounting members mounted in the brush head shell, each of the bristle mounting members is mounted with a bristle bundle; a transmission assembly at least partially mounted in the brush head shell, each of the bristle mounting members is in transmission connection with the transmission assembly, and the transmission assembly drives the bristle mounting members to rotate when the bristle mounting members rotate, and drives the bristle bundles mounted on the bristle mounting members to rotate around their respective central axes; a plurality of elastic sealing members; wherein one of the elastic sealing members is arranged between each of the bristle mounting members and the inner wall of the brush head shell, and the bristle bundle passes through the elastic sealing member and extends out of the outer surface of the brush head shell.

2. The toothbrush head of claim 1, wherein: The brush head shell is provided with a bristle opening and a mounting groove opposite to the bristle opening, the bristle mounting member is mounted in the mounting groove, and the elastic sealing member is arranged on one side of the bristle opening, and the bristle bundle passes through the elastic sealing member and extends out of the outer surface of the brush head shell from the bristle opening.

3. The toothbrush head of claim 1, wherein: The brush head shell is provided with a bristle opening, the top of the bristle mounting member on the side facing the bristle opening is provided with a first abutting surface, the brush head shell on the side of the bristle opening is provided with a second abutting surface opposite to the first abutting surface, and the elastic sealing member abuts against the first abutting surface and the second abutting surface respectively.

4. The toothbrush head according to claim 3, wherein: the first abutting surface is arranged as a flat surface or a concave curved surface; the second abutting surface is arranged as a flat surface or a concave curved surface.

5. The toothbrush head of claim 1, wherein: The transmission assembly comprises a transmission gear and a transmission shaft, the transmission shaft is mounted at one end of the toothbrush head away from the bristle mounting member, and the transmission gear is mounted between the bristle mounting member and the transmission shaft and is in transmission connection with the bristle mounting member and the transmission shaft; the transmission shaft can rotate around a first axis along a first direction, and the transmission shaft can drive the transmission gear to rotate around a second axis along a second direction; the first direction is perpendicular to the second direction.

6. The toothbrush head of claim 3, wherein: The inner diameter of the elastic sealing member is greater than the diameter of the bristle opening.

7. The toothbrush head of claim 6, wherein: The thickness of the elastic sealing member ranges between 0.3 and 0.5 mm.

8. The toothbrush head of claim 6, wherein: The inner diameter of the elastic sealing member ranges between 2.0 and 3.4 mm, and the diameter of the bristle opening ranges between 1.8 and 3 mm.

9. The toothbrush head of claim 3, wherein: The outer diameter of the elastic sealing member ranges between 3.9 and 5.0 mm, and the distance between the first abutting surface and the second abutting surface ranges between 0.2 and 0.4 mm.

10. The toothbrush head of claim 1, wherein: The rotational speed of the plurality of bristle bundles is 1-30 revolutions per second.

11. The toothbrush head of claim 1, wherein: The moment of the plurality of bristle bundles is between 0 and 3 kg·cm.

12. An electric toothbrush, characterized by The toothbrush head as claimed in any one of claims 1-11 further comprises: a toothbrush handle comprising a shell, a driving motor and a power supply member, the toothbrush head is assembled at one end of the shell, the driving motor and the power supply member are mounted in the shell, and the driving motor is located at one end of the shell close to the toothbrush head, and the power supply member is used to provide current to the driving motor; wherein the driving motor is in transmission connection with the transmission assembly, and the transmission assembly transmits the power of the driving motor to the bristle mounting member, so that the bristle mounting member can drive the bristle bundle to rotate.

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