Toothbrush head and electric toothbrush

Abstract

The present application relates to the field of electric toothbrushes and provides a toothbrush head and an electric toothbrush. The electric toothbrush head comprises a first body and a second body. A brush head assembly is mounted in the first body. The second body is adapted to be detachably mounted on a toothbrush main body, a transmission assembly is provided in the second body, and the transmission assembly is in transmission connection with the brush head assembly, such that the first body and the second body are arranged in a segmented manner. The electric toothbrush comprises the electric toothbrush head and the toothbrush main body. According to the present application, the first body and the second body are arranged in a segmented manner, and the brush head assembly in the first body is, by means of the transmission assembly in the second body, in transmission connection with a drive shaft of the toothbrush main body, such that the drive shaft is, by means of the transmission assembly, directly connected to the brush head assembly, and the second body does not vibrate. In this case, the second body can be fitted closely to the toothbrush main body, thereby improving the waterproof performance of the electric toothbrush and reducing the generation of water scale. In addition, the second body does not vibrate, thereby preventing the second body from numbing the lips or oral cavity due to vibration, and improving the use experience of a user.

Description

A toothbrush head and an electric toothbrush TECHNICAL FIELD

[0001] The present application relates to the field of electric toothbrushes, and further relates to a toothbrush head and an electric toothbrush. BACKGROUND

[0002] Electric toothbrushes are very popular among consumers in daily life. The toothbrush head of the existing electric toothbrush can vibrate at a high frequency, so that the bristles on the toothbrush head can clean the teeth at a high frequency. However, the end of the existing toothbrush head close to the toothbrush main body is directly connected with the driving shaft, and the driving shaft drives the entire toothbrush head to vibrate at a high frequency. Although this mode has a relatively obvious vibration effect of the toothbrush head, in the process of vibration of the toothbrush head, not only the bristles of the toothbrush head are vibrated to contact the teeth, but also the brush rod of the toothbrush head will contact the lips or oral cavity of the user. The high-frequency vibration of the brush rod of the toothbrush head will vibrate the lips or oral cavity, which brings discomfort to the user. Moreover, since the entire toothbrush head needs to vibrate, a gap needs to be left between the toothbrush head and the toothbrush main body to provide a space for the vibration of the toothbrush head, which results in a large gap between the top of the toothbrush main body and the bottom of the toothbrush head. The gap is easy to enter water flow and form water scale at the gap, which is not conducive to waterproof treatment of the toothbrush main body and the toothbrush head. SUMMARY

[0003] In view of the above technical problems, the present application aims to provide a toothbrush head and an electric toothbrush. The first body and the second body are arranged in a segmented manner. The brush head assembly in the first body is drivingly connected to the driving shaft of the toothbrush main body through the transmission assembly in the second body. The driving shaft is directly connected to the brush head assembly through the transmission assembly. The second body does not vibrate. At this time, the second body can be closely attached to the toothbrush main body, the waterproof performance of the electric toothbrush is improved, and the generation of water scale is reduced. Moreover, the second body does not vibrate, which avoids the vibration of the second body to the lips or oral cavity, and improves the user experience.

[0004] To achieve the above-mentioned purpose, the present application provides a toothbrush head, which comprises a first body and a second body.

[0005] A brush head assembly is installed in the first body.

[0006] The second body is arranged below the first body and is adapted to be detachably installed on the toothbrush main body. The second body is internally provided with a transmission assembly. The transmission assembly is drivingly connected to the brush head assembly, so that the first body and the second body are arranged in a segmented manner.

[0007] In some embodiments, the transmission assembly comprises a transmission shaft and a connecting body. One end of the transmission shaft is drivingly connected to the brush head assembly through a connecting piece. The other end of the transmission shaft is drivingly connected to the driving shaft of the toothbrush main body.

[0008] The connecting body is arranged inside the second body, and a gap is left between the outer wall of the connecting body and the inner wall of the second body;

[0009] The connecting body is provided with a first assembly groove and a second assembly groove at two ends thereof, the first assembly groove is adapted to accommodate the other end of the transmission shaft, and the second assembly groove is adapted to accommodate a driving shaft.

[0010] In some embodiments, the connecting body is a hard encapsulation, so that the brush head assembly is directly driven by the driving shaft of the toothbrush body through the transmission assembly.

[0011] In some embodiments, the second body has a receiving cavity, and the receiving cavity is provided with a first hole at an axial end thereof, and one end of the transmission assembly is adapted to pass through the first hole;

[0012] The outer side of the transmission assembly is provided with a damping assembly, and the damping assembly comprises a first damping member, the first damping member is arranged between the inner wall of the second body and the outer wall of the transmission assembly, so that the outer wall of the transmission assembly and the inner wall of the second body are not in direct contact.

[0013] In some embodiments, the first damping member comprises a first damping portion, the first damping portion is elastically arranged between the inner side wall of the first hole and the outer side wall of the transmission assembly, so that the transmission assembly is arranged between the part of the second body and the inner wall of the second body;

[0014] The transmission assembly is further provided with a damping groove at a position corresponding to the first hole, and the first damping portion is arranged in the damping groove;

[0015] The outer side wall of the first damping portion is further provided with a plurality of damping protrusions arranged at intervals, the damping protrusions are arranged at intervals along the second body and are elastically connected to the inner side wall of the first hole.

[0016] In some embodiments, the end of the first hole away from the brush head assembly is further provided with a first abutting wall, one side of the damping groove away from the brush head assembly is further provided with a second abutting wall, and the first damping member further comprises a second damping portion, the second damping portion is arranged on the side of the first damping portion away from the brush head assembly and is located between the second abutting wall of the damping groove and the first abutting wall of the first hole.

[0017] In some embodiments, one end of the first hole close to the brush head assembly is provided with a third abutting wall, and one side of the brush head assembly close to the transmission assembly is provided with a fourth abutting wall, and the third abutting wall and the fourth abutting wall are arranged at intervals;

[0018] The first damping member further comprises a third damping portion, which is arranged at one end of the first damping portion close to the brush head assembly and is located between the third abutting wall and the fourth abutting wall, so that the brush head assembly and the second body are not in direct contact.

[0019] In some embodiments, a second damping member is further included, which is arranged at one end of the transmission assembly away from the brush head assembly, and the second damping member comprises a fourth damping portion and a fifth damping portion, the fourth damping portion is arranged between the outer side wall of the transmission assembly and the inner side wall of the second body;

[0020] The transmission assembly is provided with a fifth abutting wall at one end away from the brush head assembly, and the second body is further provided with a shaft sleeve at the other end, the shaft sleeve is provided with a sixth abutting wall at one end close to the brush head assembly, and the fifth damping portion is arranged at one end of the fourth damping portion close to the shaft sleeve and is located between the fifth abutting wall and the sixth abutting wall, so that the transmission assembly and the shaft sleeve are not in direct contact.

[0021] In some embodiments, a third damping member is further included, which is connected to one end of the first damping member and the second damping member close to each other, so that the damping assembly is arranged outside all parts of the transmission assembly inside the second body, and all parts of the transmission assembly inside the second body are not in direct contact with the second body.

[0022] In some embodiments, the brush head assembly is rotatably mounted on the second body through the transmission assembly, and the second assembly groove before and after rotation of the transmission assembly is suitable for fixedly connecting the driving shaft of the toothbrush body.

[0023] In some embodiments, the second body is provided with a second channel at the other end in the axial direction, and the second channel is matched with the second assembly groove of the transmission assembly; the second assembly groove is provided with a first fixed wall, a second fixed wall and a guide wall, the first fixed wall and the second fixed wall are arranged in sequence and spaced apart in the axial direction around the second body and are suitable for abutting and fixing with the driving shaft of the toothbrush body; the guide wall is arranged at one end of the second assembly groove away from the brush head assembly, and the driving shaft of the toothbrush body is suitable for driving the transmission assembly to rotate along the guide wall, so that the second assembly groove is matched with the driving shaft.

[0024] In some embodiments, the brush head assembly comprises a brush head support, a bristle holder and bristles, the brush head support is arranged inside the first body, the brush head support is sleeved at one end of the transmission shaft and is fixedly connected to the transmission shaft through the connecting member, the brush head support is provided with the bristle holder, and the bristle holder is provided with the bristles.

[0025] According to another aspect of the present application, there is further provided an electric toothbrush comprising any one of the toothbrush heads and the toothbrush body of the preferred embodiments described above, the toothbrush body comprising a handle, a driving member, a driving shaft and a connecting seat, the second body of the electric toothbrush head being adapted to be sleeved on the connecting seat and tightly fitted with the toothbrush body, the driving shaft penetrating through the connecting seat and being adapted to be drivingly connected with the transmission assembly of the electric toothbrush head, the handle being provided with a first channel at one end, the handle being provided with a mounting seat, the mounting seat being provided with a second channel corresponding to the first channel; the driving member being mounted on the mounting seat, the driving shaft of the driving member being adapted to penetrate through the second channel and the first channel and then be connected with the toothbrush head; the toothbrush body further comprising an elastic assembly;

[0026] The elastic assembly comprises a first elastic member, the first elastic member being arranged between the driving member and the mounting seat so that the driving member and the mounting seat are not in direct contact.

[0027] In some embodiments, the mounting seat is provided with a mounting groove on the inner side wall, the first elastic member being arranged in the mounting groove, the first elastic member being at least partially extended out of the slot of the mounting groove and being connected with the outer side wall of the driving member so that the driving member and the mounting seat are arranged at a distance from each other.

[0028] In some embodiments, the mounting seat comprises a first seat body, a second seat body and a third seat body, the first seat body being arranged axially along the handle, the second seat body being connected with the first seat body at one end away from the first channel and being arranged radially along the handle, the third seat body being arranged axially along the handle and being connected with the second seat body at one end away from the first seat body;

[0029] The driving member is provided with a first connecting wall corresponding to the first seat body, a second connecting wall corresponding to the second seat body and a third connecting wall corresponding to the third seat body;

[0030] The first elastic member comprises a first elastic part, a second elastic part and a third elastic part, the first elastic part being arranged between the first seat body and the first connecting wall, the second elastic part being arranged between the second seat body and the second connecting wall, and the third elastic part being arranged between the third seat body and the third connecting wall.

[0031] In some embodiments, the handle is further provided with a placing bracket at the side of the driving member away from the first channel, the placing bracket comprising a first bracket body and a second bracket body, the first bracket body being arranged outside the end of the driving member, and the second bracket body being arranged outside the side wall of the driving member;

[0032] The elastic assembly further comprises a second elastic member, the second elastic member comprises a fourth elastic part and a fifth elastic part, the fourth elastic part is arranged between the first support body and the end of the driving member, and the fifth elastic part is arranged between the second support body and the side wall of the driving member, so that the driving member is not in direct contact with the placement support; the elastic assembly further comprises a third elastic member, the third elastic member is arranged on the outer side wall of the driving member and is located between the mounting seat and the placement support, so that the outer side wall of the driving member is not in direct contact with the inner side wall of the handle body.

[0033] In some embodiments, the toothbrush body is further provided with a water blocking sealing ring, the water blocking sealing ring is sleeved on the driving shaft and is located below the connecting seat; gaps are left between the driving shaft and the inner side walls of the second channel and the first channel, and the water blocking sealing ring is sealingly arranged on the outer side of the driving shaft and is located at one end of the second channel close to the first channel, so that the driving shaft and the second channel are sealingly arranged.

[0034] In some embodiments, the mounting seat comprises a first assembly wall, the first assembly wall is arranged at one end of the second channel close to the first channel, the water blocking sealing ring comprises a first waterproof part, the first waterproof part is sealingly arranged on the outer side of the driving shaft and is sealingly connected to one end of the first assembly wall close to the first channel; the mounting seat further comprises a second assembly wall, the second assembly wall is arranged on one side of the first assembly wall close to the first channel along the axial direction of the handle body, and the inner side wall of the second assembly wall is arranged at a distance from the outer side wall of the first waterproof part;

[0035] The water blocking sealing ring further comprises a second waterproof part, the second waterproof part is connected to one end of the first waterproof part close to the first channel, and the second waterproof part is sealingly arranged between one end of the first channel close to the second channel and one end of the second assembly wall away from the second channel.

[0036] In some embodiments, the inner side of the handle body is further provided with a mounting ring wall, and the second assembly wall of the mounting seat is adapted to be mounted in abutment with the mounting ring wall;

[0037] The water blocking sealing ring further comprises a third waterproof part, the third waterproof part is arranged at one end of the second waterproof part away from the first waterproof part and is sealingly arranged between the second assembly wall and the mounting ring wall;

[0038] The outer side wall of the third waterproof part is provided with a plurality of second waterproof protrusions, the plurality of second waterproof protrusions are arranged at a distance along the axial direction of the handle body and are in abutment with the inner side wall of the mounting ring wall.

[0039] In some embodiments, the mounting seat further comprises a third assembly wall, which is arranged radially on the second assembly wall away from the first channel;

[0040] The first waterproof part further comprises a fourth waterproof part and a fifth waterproof part, the fourth waterproof part is arranged at one end of the third waterproof part away from the second waterproof part and is sealingly arranged between the end of the mounting ring wall away from the first channel and the third assembly wall, and the fifth waterproof part is arranged at one end of the fourth waterproof part away from the third waterproof part and is located between the inner side wall of the handle body and the outer side wall of the first seat body.

[0041] In some embodiments, the second body end is provided with a shaft sleeve, and a pair of elastic clamping blocks are arranged on both sides of the shaft sleeve;

[0042] The outer side wall of the connecting seat is provided with a fixed clamping block, the elastic clamping blocks at least partially overlap with the fixed clamping block in the projection of the connecting seat, and during the buckling of the shaft sleeve and the connecting seat, the pair of elastic clamping blocks at least partially abut against the fixed clamping block at all times, so that the second body is adapted to be inserted and pulled out at any angle in the connecting seat of the toothbrush main body.

[0043] The pair of elastic clamping blocks are symmetrically arranged on both sides of the shaft sleeve, the included angle between the pair of elastic clamping blocks at one end of the shaft sleeve close to each other in the circumferential direction is a first included angle, the included angle between the fixed clamping blocks at both ends of the connecting seat away from each other in the circumferential direction is a second included angle, and the first included angle is smaller than the second included angle, so that the circumference of the fixed clamping block is always greater than the maximum circumference of the pair of elastic clamping blocks.

[0044] In some embodiments, a base and a bottom cover are further included, the base is fixedly arranged at the bottom of the handle main body, the first clamping groove and the second clamping groove are throughly arranged on the base, and the second clamping groove is adapted to install a charging assembly;

[0045] The bottom cover comprises a first cover body and a second cover body, the first cover body is arranged on the top of the second cover body, the first cover body is provided with a connecting part, the connecting part movably connects the first clamping groove, the second cover body is provided with a buckling groove, the first cover body is provided with an elastic air hole at the position corresponding to the buckling groove, and the elastic air hole can be automatically opened and closed to discharge the air between the base and the bottom cover.

[0046] Compared with the prior art, the toothbrush head and the electric toothbrush provided by the application have at least one of the following beneficial effects:

[0047] 1. The first body and the second body are segmented, the brush head assembly in the first body is drivenly connected to the driving shaft of the toothbrush body through the transmission assembly in the second body, so that the driving shaft directly drives the brush head assembly through the transmission assembly, the second body does not vibrate, at this time the second body can be closely attached to the toothbrush body, improve the waterproof performance of the electric toothbrush, reduce the generation of water scale; and the second body does not vibrate, avoiding the second body vibrating the lips or the oral cavity, improving the user's experience.

[0048] 2. The connecting body can drive connect the transmission shaft and the driving shaft, better transmit the vibration of the driving shaft to the transmission shaft, effectively reduce the vibration and noise, improve the running stability and precision of the toothbrush head, also increase the dustproof, waterproof and corrosion-resistant properties of the transmission shaft, and have stronger durability.

[0049] 3. The electric toothbrush adopts a segmented toothbrush head, relying on the scientific damping structure of the segmented toothbrush head, ensuring strong vibration of the bristles while making unnecessary shaking of the second body of the toothbrush head almost zero, significantly reducing the impact of the second body on the gums, teeth and oral cavity, creating a more comfortable brushing experience; at the same time, the second body is sleeved on the connecting seat and closely attached to the toothbrush body, reducing the gap between the second body and the toothbrush body and increasing the waterproof performance.

[0050] 4. The two ends of the transmission assembly are adapted to be directly fixedly connected to the driving shaft of the toothbrush body and the brush head assembly, and the connecting body is made of racing steel material, so that the vibration of the driving shaft is directly transmitted to the brush head assembly through the transmission assembly, the vibration loss of the brush head assembly is small, and the vibration transmission efficiency is high; the brush head assembly is spaced apart from the second body, and the vibration of the brush head assembly is not transmitted to the second body, avoiding the second body vibrating the oral cavity.

[0051] 5. The second body is internally provided with a rotatable transmission assembly, the two ends of the transmission assembly are adapted to be connected to the brush head assembly and the driving shaft of the toothbrush body, so that the brush head assembly is rotatably mounted on the second body, and after the toothbrush head is pulled out, only the brush head assembly and the transmission assembly need to be axially rotated around the second body, without affecting the connection between the second body and the toothbrush body, without the need to rotate the entire toothbrush head to adjust the orientation of the bristles, facilitating tooth brushing for children and having a wider range of use.

[0052] 6. The transmission assembly is coaxially arranged in the second body through the damping assembly, so that the transmission assembly is not in direct contact with the second body, achieving suspension of the transmission assembly in the second body, avoiding the transmission assembly impacting the second body, the transmission assembly has high vibration transmission efficiency and low noise; the damping assembly softly contacts the transmission assembly and the second body, so that the vibration of the transmission assembly is not transmitted to the second body, the oral cavity of the user is not numb, and the user has a better experience.

[0053] 7. The elastic assembly is provided between the driving member and the mounting seat, so that the driving member is suspended in the handle body without direct contact between the driving member and the mounting seat, the vibration transmission between the driving member and the mounting seat is avoided, the vibration transmission efficiency of the driving member to the toothbrush head is improved, and the noise is small; moreover, the vibration of the driving member will not be transmitted to the handle through the mounting seat, so that the vibration of the toothbrush handle is extremely small, and the use experience is better.

[0054] 8. The water blocking sealing ring is provided on the outer side of the driving shaft and at one end of the second channel close to the first channel, so that the outer side wall of the driving shaft and the inner side wall of the second channel are sealingly arranged, the liquid entering the first channel is blocked at the end of the second channel by the water blocking sealing ring, the liquid is prevented from contacting the driving member after passing through the second channel, and the waterproof performance of the toothbrush body and the safety performance of the driving member are improved.

[0055] 9. The elastic clamping blocks at least partially overlap the fixed clamping blocks within the projection range of the connecting seat, so that the pair of elastic clamping blocks always at least partially abut the fixed clamping blocks, no matter what the rotation angle of the second body is, the elastic clamping blocks can form a reliable connection relationship with the fixed clamping blocks, so as to ensure that the second body can be smoothly inserted and pulled out of the connecting seat of the toothbrush body at any angle, the user can easily complete the replacement of the toothbrush head without accurately aligning the angle of the second body, the installation and disassembly process of the toothbrush head is simplified, the flexibility and convenience of use are improved, and the user experience is significantly improved.

[0056] 10. The circumference of the fixed clamping block is always greater than the maximum circumference of the elastic clamping blocks, and the elastic clamping blocks can always maintain at least partial abutment when interacting with the fixed clamping blocks, which not only provides stable connection force for the insertion and pulling-out process, but also ensures that the second body can be smoothly inserted and pulled out of the connecting seat of the toothbrush body at any angle without jamming or loosening.

[0057] 11. The connecting piece fixedly connects the brush head support and the transmission shaft, so that the transmission shaft fixedly connects the first body and the second body, the connecting piece and the bristle holder are relatively located on both sides of the transmission shaft, and the connecting piece is relatively located at the bottom of the bristle holder, so that the center of gravity of the brush head assembly is located on the central axis of the transmission assembly, the center of gravity of the toothbrush head is better balanced, and a counterweight is not required, and the structure is simple. BRIEF DESCRIPTION OF DRAWINGS

[0058] The above-mentioned characteristics, technical features, advantages and implementation modes of the present application will be further described in the following preferred embodiments in a clear and easy-to-understand manner in combination with the accompanying drawings.

[0059] FIG. 1 is a whole view of an electric toothbrush;

[0060] FIG. 2 is a sectional view of a segmented electric toothbrush head;

[0061] FIG. 3 is a sectional view of a first body;

[0062] Fig. 4 is an exploded view of the first body;

[0063] Fig. 5 is an exploded view of the second body;

[0064] Fig. 6 is a sectional view of the toothbrush body;

[0065] Fig. 7 is a structural view of the toothbrush body;

[0066] Fig. 8 is a sectional view of the second body in another embodiment;

[0067] Fig. 9 is a sectional view of the brush head assembly;

[0068] Fig. 10 is a sectional view of the first damping member;

[0069] Fig. 11 is a position view of the second assembly groove;

[0070] Fig. 12 is a sectional view of the second assembly groove;

[0071] Fig. 13 is a structural view of the second damping member;

[0072] Fig. 14 is a sectional view of the toothbrush body;

[0073] Fig. 15 is an assembly view of the mounting seat;

[0074] Fig. 16 is a structural view of the second elastic member;

[0075] Fig. 17 is a sectional view of the toothbrush body;

[0076] Fig. 18 is a sectional view of the toothbrush body;

[0077] Fig. 19 is a connection view of the shaft sleeve and the connecting seat;

[0078] Fig. 20 is a structural view of the connecting seat;

[0079] Fig. 21 is a sectional view of a charging bottom cover assembly;

[0080] Fig. 22 is a structural view of the bottom cover;

[0081] Fig. 23 is a sectional view of the telescopic air hole;

[0082] Fig. 24 is a bottom view of the first cover body;

[0083] Fig. 25 is a top view of the second cover body;

[0084] Fig. 26 is a sectional view of the center of gravity balanced toothbrush head;

[0085] [Corrected according to Rule 91 on 30.05.2025]Fig. 27 is a structural view of the brush head support; [0085.1][Corrected according to Rule 91 on 30.05.2025] Fig. 28 is a side view of the brush head holder.

[0086] Explanation of reference numerals: first body 1, brush head assembly 11, brush head support 111, first support body 1111, second support body 1112, connecting groove 1113, second counterweight groove 1114, bristle holder 112, fourth abutting wall 1121, fixing groove 1122, first counterweight groove 1123, bristle 113, connecting piece 12, second body 2, first protrusion 20, transmission assembly 21, transmission shaft 211, damping groove 2110, second abutting wall 2111, connecting body 212, hard rubber 2120, second assembly groove 2121, first fixed wall 21211, second fixed wall 21212, guide wall 21213, fifth abutting wall 2122, shaft sleeve 22, first groove 221, elastic clamping block 222, mounting hole 2222, elastic groove 2223, sixth abutting wall 223, second abutting block 224, third abutting block 225, accommodating cavity 23, first hole 231, first abutting wall 2311, third abutting wall 2312, second hole 232, first damping piece 24, first damping part 241, damping protrusion 2411, second damping part 242, second damping piece 25, fourth damping part 251, fifth damping part 252, toothbrush body 3, connecting seat 31, mounting groove 311, drive shaft 32, fixed clamping block 313, first guide wall 3131, smooth wall 3132, second guide wall 3133, first abutting block 314, water blocking seal ring 33, first waterproof part 331, first waterproof protrusion 3311, second waterproof part 332, third waterproof part 333, second waterproof protrusion 3331, fourth waterproof part 334, fifth waterproof part 335, handle body 34, first channel 341, second channel 342, mounting seat 343, mounting groove 3430, first seat body 3431, second seat body 3432, fixed hole 34321, third seat body 3433, mounting ring wall 344, first assembly wall 345, second assembly wall 346, third assembly wall 347, drive piece 35, first connecting wall 351, second connecting wall 352, third connecting wall 353, first elastic piece 36, first elastic part 361, second elastic part 362, third elastic part 363, placing support 37, first support body 371, second support body 372, second elastic piece 38, fourth elastic part 381, fifth elastic part 382, third elastic piece 39, base 4, first clamping groove 41, second connecting block 411, sealing sleeve 412, second clamping groove 42, charging assembly 421, bottom cover 5, first cover body 51, connecting part 511, first connecting block 5111, guide wall 5112, guide protrusion 5113, telescopic air hole 512, first bottom wall 5121, second bottom wall 5122, annular groove 513, contact groove 514, sealing part 515, second cover body 52, buckle groove 521, annular protrusion 522, contact column 523, battery seat 6, first pressing block 61, second pressing block 62. DETAILED DESCRIPTION

[0087] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, specific implementations of the present application will be described below with reference to the drawings. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative effort, and other embodiments can also be obtained.

[0088] For the sake of simplicity of the drawings, only the parts related to the present application are shown in each drawing, and they do not represent the actual structure of the product. In addition, in order to make the drawings simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is marked. In this document, "one" not only means "only one", but also means "more than one" in some cases.

[0089] It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0090] In this document, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0091] In addition, in the description of the present application, the terms "first", "second", etc. are only used for differentiation and description, and cannot be understood as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above is only the preferred embodiment of the present application, and it should be noted that for those skilled in the art, without departing from the principles of the present application, several improvements and refinements can also be made, and these improvements and refinements should be considered as the protection scope of the present application.

[0092] Embodiment one: with reference to FIGS. 1 to 3, the present application provides a toothbrush head, comprising a first body 1 and a second body 2; a brush head assembly 11 is mounted in the first body 1; the second body 2 is arranged below the first body 1, and the second body 2 is adapted to be detachably mounted on a toothbrush main body 3; a transmission assembly 21 is arranged inside the second body 2, and the transmission assembly 21 is drivingly connected to the brush head assembly 11, so that the first body 1 and the second body 2 are arranged in a segmented manner.

[0093] In this embodiment, the first body 1 and the second body 2 are provided in a segmented manner, the brush head assembly 11 in the first body 1 is drivingly connected to the driving shaft 32 of the toothbrush body 3 through the transmission assembly 21 in the second body 2, so that the driving shaft 32 is directly connected to the brush head assembly 11 through the transmission assembly 21, and the second body 2 does not vibrate, at this time, the second body 2 can be closely attached to the toothbrush body 3, the waterproof performance of the electric toothbrush is improved, and the generation of water scale is reduced; moreover, the second body 2 does not vibrate, avoiding the second body 2 from vibrating the lips or oral cavity, and improving the user experience.

[0094] Specifically, the electric toothbrush head is divided into a first body 1 and a second body 2 along the axial direction, the first body 1 and the second body 2 are provided in a segmented manner, so that the vibration of the first body 1 does not affect the second body 2, and the second body 2 can not produce unnecessary shaking. When in use, the second body 2 is in contact with the lips and oral cavity of the human body, the second body 2 does not vibrate, which can avoid the second body 2 from vibrating the lips and oral cavity of the human body, effectively avoid the risk of the second body 2 vibrating or hitting the teeth, and improve the use experience and safety performance of the electric toothbrush head. The first body 1 is provided with a brush head assembly 11, and the second body 2 is provided with a transmission assembly 21, the transmission assembly 21 drivingly connects the brush head assembly 11 and the driving shaft 32 of the toothbrush body 3, the driving shaft 32 directly drives the brush head assembly 11 and the first body 1 to vibrate through the transmission assembly 21, and the second body 2 is provided separately from the first body, so that the second body 2 does not vibrate with the first body 1. At this time, the gap between the bottom of the second body 2 and the top of the toothbrush body 3 can be reduced, water is prevented from entering the gap, the generation of water scale is avoided, and water flow is also prevented from entering the toothbrush head and the toothbrush body 3, thereby improving the waterproof performance of the electric toothbrush head. The transmission assembly 21 includes a transmission shaft 211, one end of the transmission shaft 211 is drivingly connected to the brush head assembly 11 through the connecting piece 12, and the other end of the transmission shaft 211 is drivingly connected to the driving shaft 32 of the toothbrush body 3. The specific structure of the transmission assembly 21 is not limited in the present application, as long as it can drivingly connect the brush head assembly 11 and the driving shaft 32.

[0095] It is worth noting that the present application directly transmits the sweep vibration of the driving shaft 32 to the brush head assembly 11 in the first body 1, effectively avoiding the vibration of the second body 2. The first body 1 is made of soft rubber material, and the second body 2 is made of plastic material, further reducing the influence of the vibration of the first body 1 on the second body 2. The first body 1 is partially sleeved on the second body 2, and this partial sleeving is for the consideration of aesthetics and waterproofness, so that the appearance of the electric toothbrush head is more integrated, and water is also prevented from entering the inside of the second body 2 from the connection between the first body 1 and the second body 2.

[0096] Further, referring to FIG. 3 and FIG. 4, the brush head assembly 11 comprises a brush head support 111, a bristle holder 112 and bristles 113, the brush head support 111 is arranged inside the first body 1, the brush head support 111 is sleeved on one end of the transmission shaft 211 and fixedly connected with the transmission shaft 211 through the connecting piece 12, the brush head support 111 is provided with the bristle holder 112, and the bristle holder 112 is provided with the bristles 113.

[0097] In the embodiment, the brush head support 111 is fixedly connected with the transmission shaft 211 through the connecting piece 12, so that the driving shaft 32 transmits the vibration to the bristles 113 of the brush head assembly 11 through the transmission shaft 211, and the connecting piece 12 fixedly connects the brush head support 111 and the transmission shaft 211, and also fixedly connects the first body 1 and the second body 2, thereby preventing the first body 1 and the second body 2 from being separated from each other.

[0098] Specifically, the first body 1 and the second body 2 are connected through the transmission shaft 211 and the connecting piece 12, and the first body 1 and the second body 2 are not fixedly connected with each other, thereby avoiding that the first body 1 drives the second body 2 to vibrate. The connecting piece 12 comprises a pin, the brush head support 111 is provided with a first pin hole, the transmission shaft 211 is provided with a second pin hole, and the pin fixedly connects the transmission shaft 211 and the brush head support 111 through the first pin hole and the second pin hole, so that the transmission shaft 211 can drive the bristles 113 on the brush head support 111 to vibrate. The brush head support 111 is provided with a first mounting cavity, one end of the transmission shaft 211 is fixedly installed in the first mounting cavity through the connecting piece 12, the bristle holder 112 is arranged on one side of the first mounting cavity and fixedly connected with the brush head support 111, the bristle holder 112 is provided with the bristles 113, and the bristles 113 extend out of the first body 1. The first body 1 is sleeved outside the brush head assembly 11.

[0099] It is worth noting that the connecting piece 12 comprises but is not limited to the pin, and can also be a fixed structure such as a pin column, a positioning pin and the like. The specific structure of the pin is not further limited in the present application, and can be a cylindrical pin, a conical pin and a split pin.

[0100] Further, referring to FIG. 2 and FIG. 5, the connecting body 212 is arranged inside the second body 2, and a gap is left between the outer side wall of the connecting body 212 and the inner side wall of the second body 2; the connecting body 212 is provided with a first assembly groove and a second assembly groove which are not communicated, the other end of the transmission shaft 211 is adapted to be placed in the first assembly groove, and the driving shaft 32 is adapted to be placed in the second assembly groove.

[0101] In the embodiment, the connecting body 212 can drivingly connect the transmission shaft 211 and the driving shaft 32, can better transmit the vibration of the driving shaft 32 to the transmission shaft 211, effectively reduces the vibration and noise, improves the running stability and precision of the toothbrush head, and also adds the characteristics of dustproof, waterproof and corrosion resistance to the transmission shaft 211, and has stronger durability.

[0102] Specifically, the connecting body 212 is a shaft sleeve, which is arranged outside one end of the transmission shaft 211, and has the advantages of small frictional resistance, small power consumption and high mechanical efficiency. The connecting body 212 is provided with a first assembly groove and a second assembly groove which are not communicated. The first assembly groove is adapted to accommodate the other end of the transmission shaft 211, and the second assembly groove is adapted to accommodate one end of the driving shaft 32, so as to drive connect the transmission shaft 211 and the driving shaft 32. Moreover, a gap is left between the outer side wall of the connecting body 212 and the inner side wall of the second body 2, so as to avoid that the vibration of the connecting body 212 drives the vibration of the second body 2. The specific shape of the connecting body 212 will not be described further.

[0103] Further, referring to FIGS. 6 and 6, the second body 2 further comprises a shaft sleeve 22, which is arranged inside the bottom of the second body 2 and is located below the connecting body 212. The outer side wall of the shaft sleeve 22 is provided with a first recess 221, and the inner side wall of the second body 2 is provided with a first protrusion 20, which is adapted to be clamped and fixed in the first recess 221.

[0104] In this embodiment, the outer side wall of the shaft sleeve 22 is fixedly connected with the inner side wall of the second body 2, and the shaft sleeve 22 is adapted to be sleeved on the connecting seat 31 of the toothbrush body 3, so as to increase the waterproof performance of the second body 2 and the toothbrush body 3, and avoid water from entering the inside of the second body 2 and the toothbrush body 3.

[0105] Specifically, the shaft sleeve 22 is arranged inside the second body 2 and is located below the connecting body 212 of the transmission assembly 21. The outer side wall of the shaft sleeve 22 is provided with a first recess 221, and the inner side wall of the second body 2 is provided with a first protrusion 20, which is adapted to be clamped and fixed in the first recess 221. The shaft sleeve 22 is further provided with a connecting seat 31 outside the toothbrush body 3, and the inner side wall of the shaft sleeve 22 is further provided with an elastic clamping block 222, which is adapted to be clamped and fixed in the mounting groove 311 of the connecting seat 31 of the toothbrush body 3, so that the second body 2 can be detachably mounted on the toothbrush body 3. It is worth noting that the first protrusion 20 can also be arranged outside the shaft sleeve 22, and the first recess 221 can be arranged on the inner side wall of the second body 2.

[0106] Embodiment two: referring to FIG. 8 to FIG. 11, the toothbrush head comprises a second body 2, a transmission assembly 21 and a brush head assembly 11, the second body 2 has a containing cavity 23 with two axial ends open; the transmission assembly 21 is provided with a second assembly groove 2121 at one end and is arranged in the containing cavity 23 of the second body 2, the second assembly groove 2121 is suitable for inserting the drive shaft 32 of the toothbrush body 3, the other end of the transmission assembly 21 extends out of the other end of the containing cavity 23; the brush head assembly 11 is arranged spaced apart from the second body 2, the brush head assembly 11 is provided with bristles 113, the brush head assembly 11 is fixedly connected to the other end of the transmission assembly 21, so that the brush head assembly 11 and the drive shaft 32 of the toothbrush body 3 are directly drivingly connected through the transmission assembly 21.

[0107] In this embodiment, the two ends of the transmission assembly 21 are suitable for directly fixedly connecting the drive shaft 32 of the toothbrush body 3 and the brush head assembly 11, the vibration of the drive shaft 32 is directly transmitted to the brush head assembly 11 through the transmission assembly 21, the vibration loss of the brush head assembly 11 is small, and the vibration transmission efficiency is high; the brush head assembly 11 is arranged spaced apart from the second body 2, the vibration of the brush head assembly 11 is not transmitted to the second body 2, and the second body 2 is avoided from vibrating the mouth and the lips.

[0108] Specifically, one end of the transmission assembly 21 penetrates through one end of the second body 2 in the axial direction and is fixedly connected with the brush head assembly 11, and the other end of the transmission assembly 21 is located inside the second body 2 and is adapted to be fixedly connected with the drive shaft 32 of the toothbrush body 3, so that the brush head assembly 11, the transmission assembly 21 and the drive shaft 32 are all rigidly connected, i.e., are all directly drivingly connected. The vibration of the drive shaft 32 can be directly transmitted to the brush head assembly 11 through the transmission assembly 21. The accommodating cavity 23 of the second body 2 is open at both ends, one end of the accommodating cavity 23 is provided with a shaft sleeve 22, and the shaft sleeve 22 is fixedly connected with the inner side wall of the second body 2. The cross section of the second body 2 gradually decreases along the axial direction thereof from the end far away from the brush head assembly 11 to the end close to the brush head assembly 11. The connecting seat 31 of the toothbrush body 3 is adapted to be fixedly connected with the shaft sleeve 22 inside the second body 2, so that the drive shaft 32 of the toothbrush body 3 is connected into the second assembly groove 2121 of the transmission assembly 21 after penetrating through the one end opening of the second body 2 and the shaft sleeve 22, so that the transmission assembly 21 is rigidly connected with the drive shaft 32, and the drive shaft 32 directly transmits the vibration to the transmission assembly 21. At this time, there is also a gap between the drive shaft 32 and the shaft sleeve 22, so as to avoid the vibration impact between the drive shaft 32 and the shaft sleeve 22. The specific structure of the shaft sleeve 22 of the connecting seat 31 will not be described further herein, as long as the toothbrush body 3 can be fixedly connected with the toothbrush head. The other end of the transmission assembly 21 is fixedly connected with the brush head assembly 11 provided with the bristles 113 after penetrating through the other end of the accommodating cavity 23 of the second body 2, so that the transmission assembly 21 is rigidly connected with the brush head assembly 11, the vibration on the transmission assembly 21 is directly transmitted to the brush head assembly 11, and then the brush head assembly 11, the transmission assembly 21 and the drive shaft 32 are directly drivingly vibrated, the drive shaft 32 directly drives the brush head assembly 11 to vibrate, and the vibration loss of the brush head assembly 11 is reduced. The brush head assembly 11 is spaced apart from the second body 2, i.e., the brush head assembly 11 is not in direct contact with the second body 2, the vibration of the brush head assembly 11 is not transmitted to the second body 2, and the second body 2 is avoided from being vibrated. In the present application, a certain gap space is provided between the end of the brush head assembly 11 and the end of the second body 2, so that the end of the brush head assembly 11 is not in contact with the end of the second body 2. Of course, a soft rubber member can also be provided between the brush head assembly 11 and the second body 2, for filling the gap between the brush head assembly 11 and the second body 2 and eliminating the vibration transmission between the brush head assembly 11 and the second body 2, so as to realize the soft contact between the brush head assembly 11 and the second body 2.

[0109] Further, referring to FIGS. 8 and 10, the transmission assembly 21 comprises a transmission shaft 211 and a hard rubber coating 2120, the hard rubber coating 2120 is arranged outside one end of the transmission shaft 211 and is located in the accommodating cavity 23 opposite, the end of the hard rubber coating 2120 far away from the brush head assembly 11 is provided with a second assembly groove 2121, and the other end of the transmission shaft 211 is fixedly connected with the brush head assembly 11.

[0110] In the embodiment, the hard encapsulation 2120 is arranged outside the transmission shaft 211 away from the brush head assembly 11, and the end of the hard encapsulation 2120 away from the brush head assembly 11 is provided with a second assembly groove 2121 adapted to fixedly connect the drive shaft 32 of the toothbrush body 3, so as to facilitate the direct transmission connection between the transmission assembly 21 and the drive shaft 32 and improve the durability of the transmission assembly 21.

[0111] Specifically, the hard encapsulation 2120 is arranged outside the part of the transmission shaft 211 located in the accommodating cavity 23, and the hard encapsulation 2120 is formed outside the transmission shaft 211, and the hard encapsulation 2120 is made of any one of POM, PC and PEEK. Preferably, the hard encapsulation 2120 is made of POM. POM is also called racing steel material, which is easy to process and has the characteristics of good rigidity, good toughness and good wear resistance. The transmission shaft 211 is preferably made of metal.

[0112] Further, referring to FIG. 9, the brush head assembly 11 includes a bristle holder 112 and a brush head support 111 fixedly installed on the bristle holder 112. The bristle holder 112 is provided with a fixing groove 1122 on the side close to the transmission assembly 21, and the fixing groove 1122 is adapted to be in interference fit with the end of the transmission assembly 21 and fixedly connect the transmission assembly 21.

[0113] In the embodiment, the brush head support 111 connected with the transmission assembly 21 and the bristle holder 112 provided with the bristles 113 are fixedly connected, so that the bristle holder 112 and the brush head support 111 are rigidly connected, and the vibration of the transmission assembly 21 can be directly transmitted to the bristle holder 112 through the brush head support 111, and the vibration transmission consumption is small.

[0114] Specifically, the bristle holder 112 and the brush head support 111 are connected by ultrasonic welding, so that the brush head assembly 11 and the brush head support 111 can be regarded as a whole. The connection between the brush head support 111 and the transmission assembly 21 is fixedly connected through the connecting piece 12. The other end of the transmission assembly 21 is also provided with a first connecting hole, and the sidewall of the brush head support 111 is also correspondingly provided with a second connecting hole, and the first connecting hole and the second connecting hole are adapted to install the connecting piece 12 and fixedly connect the transmission assembly 21 and the brush head support 111. The connecting piece 12 includes but is not limited to a latch, a pin shaft and the like.

[0115] The mounting direction of the connecting piece 12 is perpendicular to the axial direction of the second body 2, the connecting piece 12 is opposite to the bottom of the brush head support 111, the connecting piece 12 plays a role of a counterweight to a certain extent, so that the center of gravity of the brush head assembly 11 matches the axis of the transmission assembly 21, the center of gravity of the brush head assembly 11 is more balanced, and the vibration of the brush head assembly 11 is more regular and orderly. The side of the bristle holder 112 close to the transmission assembly 21 is provided with a fixing groove 1122, the fixing groove 1122 is suitable for interference fit with the end of the transmission assembly 21 and fixedly connected with the transmission assembly 21, and the end of the transmission assembly 21 and the part of the brush head support 111 provided with the fixing groove 1122 are fixedly connected with the connecting piece 12.

[0116] [Corrected according to Rule 91 on 30.05.2025] With reference to FIGS. 26-28, further, the brush head support 111 is provided with a fixing groove 1122 at the bottom, and the brush head support 111 is provided with a connecting groove 1113 at one side, the bristle holder 112 is fixedly arranged in the connecting groove 1113, and the bristle holder 112 is provided with bristles 113. The connecting piece 12 is suitable for penetratingly connecting the other side of the brush head support 111 and the transmission shaft 211, the connecting piece 12 and the bristle holder 112 are opposite to both sides of the transmission shaft 211, and the connecting piece 12 is opposite to the bottom of the bristle holder 112, so that the center of gravity of the brush head assembly 11 is located on the central axis of the transmission assembly 21.

[0117] Specifically, the connecting piece 12 fixedly connects the brush head support 111 and the transmission shaft 211, so that the transmission shaft 211 fixedly connects the first body 1 and the second body 2, the connecting piece 12 and the bristle holder 112 are opposite to both sides of the transmission shaft 211, and the connecting piece 12 is opposite to the bottom of the bristle holder 112, so that the center of gravity of the brush head assembly 11 is located on the central axis of the transmission assembly 21, the center of gravity of the brush head is better balanced, and there is no need to set a counterweight, and the structure is simple.

[0118] The connection of the connecting piece 12 to the transmission shaft 211 and the brush head support 111 plays a key role, and it penetrates the other side of the brush head support 111 and the transmission shaft 211. The connecting piece 12 is opposite to the bristle holder 112 on both sides of the transmission shaft 211, and the connecting piece 12 is opposite to the bottom of the bristle holder 112, so that the center of gravity of the brush head assembly 11 can be accurately placed on the central axis of the transmission assembly 21, so that the center of gravity of the toothbrush head can be balanced and optimized, and the need for a counterweight in the traditional electric toothbrush due to the deviation of the center of gravity can be effectively avoided. Because the bristle holder 112 is provided with the bristles 113 and is located away from the transmission shaft 211, by positioning the connecting piece 12 at the opposite position of the bottom of the bristle holder 112, the moment generated by the weight of the bristle holder 112 can be effectively offset, thereby maintaining the stability and balance of the toothbrush head. The mass distribution of the bristle holder 112 and the connecting piece 12 forms a symmetrical structure, which utilizes the principle of mechanical balance to naturally concentrate the overall center of gravity of the brush head assembly 11 on the central axis of the transmission shaft 211, without the need for additional counterweights. This not only improves the stability of the toothbrush head during use, but also helps to reduce vibrations or oscillations caused by uneven weight distribution, ensuring comfort and cleaning effectiveness during brushing. Moreover, the structure without counterweights not only simplifies the internal structure of the toothbrush head, reduces production costs and assembly difficulty, but also reduces the overall weight of the toothbrush head, making it more comfortable and convenient to use.

[0119] It is worth noting that the balance of the center of gravity of the toothbrush head is to reduce the centrifugal force of the brush head when vibrating or oscillating, thereby reducing the vibration of the brush head and improving the user experience. In the traditional design, the uneven distribution of the weight of the bristles 113 in the brush head will cause the center of gravity to deviate from the central axis, resulting in irregular oscillation and strong vibration. By arranging the bristle holder 112 and the connecting piece 12 on both sides of the transmission shaft 211 respectively, and positioning the connecting piece 12 at the bottom of the bristle holder 112, the center of gravity of the brush head assembly 11 can be as close to the central axis of the transmission shaft 211 as possible, which can effectively reduce the centrifugal force and improve the stability and comfort of the brush head.

[0120] Further, the connecting groove 1113 is in communication with the fixing groove 1122, and the side of the transmission shaft 211 close to the bristle holder 112 is aligned with the groove bottom of the connecting groove 1113, and the end of the connecting piece 12 is opposite to the groove bottom of the connecting groove 1113.

[0121] In this embodiment, the side of the transmission shaft 211 close to the bristle holder 112 is kept aligned with the groove bottom of the connecting groove 1113, which ensures that the transmission shaft 211 can smoothly pass through the connecting groove 1113 when inserted into the fixing groove 1122, and at the same time ensures the correct alignment between the transmission shaft 211 and the bristle holder 112, thereby ensuring the stability of the brush head assembly 11 and the transmission efficiency.

[0122] Specifically, the end of the connecting piece 12 is precisely located at the opposite position of the groove bottom of the connecting groove 1113, so that the connecting piece 12 can effectively connect the brush head support 111 and the transmission shaft 211, forming a solid connection, which not only enhances the structural strength of the toothbrush head, simplifies the assembly process of the toothbrush head, and improves the production efficiency; also helps to ensure the stability of the brush head assembly 11 during operation, reducing the risk of parts loosening or damage caused by vibration or impact. In addition, the brush head support 111 includes a first bracket body 1111 and a second bracket body 1112, the second bracket body 1112 is arranged at the bottom of the first bracket body 1111, the first bracket body 1111 is recessed inward on one side to form a connecting groove 1113, and the top wall of the second bracket body 1112 is the only groove wall of the connecting groove 1113. The fixing groove 1122 axially penetrates the second bracket body 1112, and at least part of the fixing groove 1122 is located at the groove bottom of the connecting groove 1113.

[0123] Further, the bristle holder 112 also has a first counterweight groove 1123 on the side close to the first bracket body 1111, the groove wall of the first counterweight groove 1123 is fixedly connected with the first bracket body 1111, so that the first counterweight cavity is formed between the first bracket body 1111 and the bristle holder 112. A plurality of second counterweight grooves 1114 are also provided on the first bracket body 1111, and the plurality of second counterweight grooves 1114 are symmetrically arranged at the groove bottom of the connecting groove 1113, so that the second counterweight cavity is formed between the first bracket body 1111 and the bristle holder.

[0124] In this embodiment, by arranging the first counterweight groove 1123 and the second counterweight groove 1114 on the opposite sides of the bristle holder 112 and the first bracket body 1111, a first counterweight cavity and a second counterweight cavity are formed between the bristle holder 112 and the first bracket body 1111, thereby achieving the balance of the weight of the toothbrush head. The first counterweight groove 1123 and the second counterweight groove 1114 can form a first counterweight cavity and a second counterweight cavity between the bristle holder 112 and the first bracket body 1111, thereby achieving the balance of the weight, which helps to reduce the vibration or swing caused by uneven weight distribution.

[0125] [According to Rule 91 correction 30.05.2025] Further, referring to FIG. 26, the transmission shaft 211 is provided with a first connecting hole, and the brush head support 111 is provided with a second connecting hole corresponding to the first connecting hole. The connecting piece 12 is adapted to penetrate the first connecting hole and the second connecting hole and fixedly connect the transmission shaft 211 and the brush head support 111. The side of the brush head support 111 away from the bristle holder 112 is also provided with a positioning groove, and the outer side of the first body 1 is provided with a third connecting hole corresponding to the second connecting hole. The first body 1 is also provided with a positioning block around the third connecting hole, and the positioning block is adapted to be arranged in the positioning groove.

[0126] Specifically, the transmission shaft 211 is provided with a first connecting hole, and the brush head support 111 is correspondingly provided with a second connecting hole. The connecting piece 12 passes through the two connecting holes, thereby achieving the fixed connection between the transmission shaft 211 and the brush head support 111. The brush head support 111 is further provided with a positioning groove on the side away from the bristle holder 112, which provides a corresponding positioning structure for the third connecting hole on the outer side of the first body 1. The first body 1 is further provided with a positioning block around the third connecting hole, which is adapted to be arranged in the positioning groove. This design establishes an accurate positioning relationship between the first body 1 and the brush head support 111, further enhancing the overall structural stability and accuracy of the toothbrush head.

[0127] In this embodiment, the second body 2 is internally provided with a rotatable transmission assembly 21. The two ends of the transmission assembly 21 are respectively adapted to connect the brush head assembly 11 and the drive shaft 32 of the toothbrush body 3, so that the brush head assembly 11 is rotatably mounted to the second body 2. After the toothbrush head is pulled out, only the brush head assembly 11 and the transmission assembly 21 need to be axially rotated around the second body 2, without affecting the connection between the second body 2 and the toothbrush body 3. The orientation of the bristles can be adjusted without rotating the entire toothbrush head, making it more convenient for children to brush their teeth and having a wider range of use.

[0128] In this embodiment, the second body 2 is internally provided with a rotatable transmission assembly 21. The two ends of the transmission assembly 21 are respectively adapted to connect the brush head assembly 11 and the drive shaft 32 of the toothbrush body 3, so that the brush head assembly 11 is rotatably mounted to the second body 2. After the toothbrush head is pulled out, only the brush head assembly 11 and the transmission assembly 21 need to be axially rotated around the second body 2, without affecting the connection between the second body 2 and the toothbrush body 3. The orientation of the bristles can be adjusted without rotating the entire toothbrush head, making it more convenient for children to brush their teeth and having a wider range of use.

[0129] Specifically, the brush head assembly 11 and the second body 2 are separately arranged, and the brush head assembly 11 is only connected to the transmission assembly 21 inside the second body 2. Therefore, the brush head assembly 11 can be rotatably arranged on one side of the second body 2 through the transmission assembly 21. At this time, the toothbrush head does not need to be rotated as a whole before being mounted on the toothbrush body 3, and the connection between the toothbrush head and the toothbrush body 3 does not need to be adaptively changed, greatly reducing the cost. Moreover, the vibration on the brush head assembly 11 will not be transmitted to the second body 2, avoiding the problem of the second body 2 being numb. It is worth noting that the transmission assembly 21 is rotatably mounted to the second body 2. It can be that there is a gap between the outer side wall of the transmission assembly 21 and the inner side wall of the second body 2, or a first damping member 24 can be arranged between the outer side wall of the transmission assembly 21 and the inner side wall of the second body 2, so that the rotation of the transmission assembly 21 will not hit the inner side wall of the second body 2. Even the outer side wall of the transmission assembly 21 and the inner side wall of the second body 2 can be arranged in close contact, as long as the transmission assembly 21 connected to the brush head assembly 11 is rotatably mounted to the second body 2.

[0130] Further, referring to FIGS. 10-13, the second body 2 has a receiving cavity 23, which is provided with a first hole 231 at one axial end, and one end of the transmission assembly 21 is adapted to pass through the first hole 231; the first hole 231 is further provided with a first damping member 24 on the outer side wall of the transmission assembly 21, which is arranged between the inner side wall of the second body 2 and the outer side wall of the transmission assembly 21, so that the transmission assembly 21 is rotatably arranged in the second body 2.

[0131] In this embodiment, the first damping member 24 is arranged between the outer side wall of the transmission assembly 21 and the inner side wall of the second body 2, which can effectively reduce the friction between the transmission assembly 21 and the first hole 231 when the transmission assembly 21 rotates, so as to avoid that the friction between the transmission assembly 21 and the first hole 231 is too large to affect the rotation efficiency of the brush head assembly 11; at the same time, the first damping member 24 also plays a waterproof role, which avoids that the outside liquid reaches the inside of the second body 2 through the first hole 231, and improves the waterproof level of the toothbrush head.

[0132] Specifically, the corresponding position of the transmission assembly 21 and the first hole 231 abuts against the first hole 231, so that the transmission assembly 21 is coaxially arranged in the receiving cavity 23 of the second body 2. The first damping member 24 includes a first damping portion 241, which is elastically arranged between the inner side wall of the first hole 231 and the outer side wall of the transmission assembly 21, so that the part of the transmission assembly 21 between the second body 2 and the inner side wall of the second body 2 is arranged at a distance from each other. The first damping portion 241 elastically connects the inner side wall of the first hole 231 and the outer side wall of the transmission assembly 21, which can not only reduce the friction between the inner side wall of the first hole 231 and the transmission assembly 21, so that the rotation of the transmission assembly 21 is more smooth and simple, but also can separate the second body 2 and the transmission assembly 21, so as to avoid that the vibration of the transmission assembly 21 is transmitted to the second body 2, and reduce the transmission attenuation of the vibration of the transmission assembly 21. Moreover, the first damping portion 241 of the first damping member 24 seals the gap between the inner side wall of the first hole 231 and the outer side wall of the transmission assembly 21, so that the liquid cannot pass through the first hole 231, avoiding the liquid from seeping in, and improving the waterproof ability. It is worth noting that the first damping member 24 can be fixedly installed on the outer side of the transmission assembly 21 or on the inner side wall of the first hole 231, which is within the protection scope of the present application. The material of the first damping member 24 includes but is not limited to soft glue, and the present application does not make further limitation.

[0133] Preferably, a plurality of damping protrusions 2411 are further arranged at a distance on the outer side wall of the first damping portion 241, which are arranged at a distance along the axial direction of the second body 2 and elastically connected with the inner side wall of the first hole 231.

[0134] In this embodiment, the first damping part 241 is provided with a plurality of damping protrusions 2411 on the outer side wall in contact with the first hole channel 231. The damping protrusions 2411 can further reduce the contact area between the first damping part 241 and the first hole channel 231, thereby further reducing the friction between the first hole channel 231 and the first damping part 24. At the same time, the damping protrusions 2411 are elastically connected to the inner side wall of the first hole channel 231, which can also increase the waterproof capability of the first damping part 24.

[0135] Specifically, the axial length of the inner side wall of the first hole channel 231 is relatively long, so that the contact area between the inner side wall of the first hole channel 231 and the transmission assembly 21 is too large, which may result in excessive friction between the first damping part 241 and the first hole channel 231. Therefore, a plurality of damping protrusions 2411 are arranged at intervals on the outer circle of the first damping part 241. The outer circle of the damping protrusions 2411 is in contact with the inner side wall of the first hole channel 231, thereby reducing the contact area between the first damping part 241 and the inner side wall of the first hole channel 231, which can effectively solve the problem of excessive friction between the first damping part 241 and the inner side wall of the first hole channel 231. At the same time, the gaps between the damping protrusions 2411 can provide a larger deformation space for the first damping part 241, enhance the elastic effect of the first damping part 24, and make the first damping part 241 have stronger damping effect.

[0136] Further, the transmission assembly 21 is also provided with a damping groove 2110 at a position corresponding to the first hole channel 231, and the first damping part 241 is arranged in the damping groove 2110. The first damping part 24 further includes a second damping part 242 arranged at one end of the first damping part 241 away from the brush head assembly 11. The second damping part 242 is elastically connected to the end of the first hole channel 231 away from the brush head assembly 11 and the side wall of the damping groove 2110 away from the brush head assembly 11. In this embodiment, the first damping part 24 is fixedly installed in the damping groove 2110 of the transmission assembly 21, which can avoid dislocation and movement of the first damping part 24 when the transmission assembly 21 rotates, thereby increasing the reliability of the first damping part 24. The second damping part 242 is arranged at the end of the first hole channel 231 away from the brush head assembly 11 and the side wall of the damping groove 2110 away from the brush head assembly 11, which can effectively avoid the impact between the transmission assembly 21 and the second body 2, and avoid damage and vibration transmission of the transmission assembly 21.

[0137] [According to Rule 91 correction 30.05.2025] Further, the accommodation cavity 23 is provided with a second hole channel 232 at the other end in the axial direction, and the second hole channel 232 is matched with the second assembly groove 2121. The second assembly groove 2121 is provided with a first fixed wall 21211 and a second fixed wall 21212, which are arranged in sequence at intervals around the second body 2 in the axial direction and are adapted to abut and fix with the drive shaft 32 of the toothbrush body 3.

[0138] In the embodiment, the first fixing wall 21211 and the second fixing wall 21212 are sequentially and spacedly arranged in the second assembly groove 2121, and the driving shaft 32 of the toothbrush body 3 is adapted to be inserted into the second assembly groove 2121 before and after rotation, so that the driving shaft 32 can be adapted to the second assembly groove 2121 of the transmission assembly 21 before and after rotation, and it is ensured that the transmission assembly 21 can normally connect the driving shaft 32.

[0139] Specifically, the first fixing wall 21211 is a flat wall, and the second fixing wall 21212 is an arc-shaped wall. The pair of second fixing walls 21212 are arranged in axial symmetry with respect to the second body 2 and oppositely located on the front and back surfaces of the toothbrush head. The first fixing wall 21211 connects the two ends of the pair of second fixing walls 21212, and the end of the driving shaft 32 is matched with the second assembly groove 2121. It is worth noting that the second assembly groove 2121 is a commonly used technology in the art, so that the transmission assembly 21 is connected with the driving shaft 32. The second assembly groove 2121 of the present application only needs to ensure that the driving shaft 32 can be connected to the second assembly groove 2121 before and after rotation, and the specific structure of the second assembly groove 2121 is not described and limited herein.

[0140] Preferably, the second assembly groove 2121 is further provided with a guide wall 21213. The guide wall 21213 is arranged at one end of the second assembly groove 2121 away from the brush head assembly 11. The driving shaft 32 of the toothbrush body 3 is adapted to drive the transmission assembly 21 to rotate along the guide wall 21213, so that the second assembly groove 2121 is matched with the driving shaft 32.

[0141] In the embodiment, the second assembly groove 2121 is further provided with a guide wall 21213 at one end away from the brush head assembly 11. The guide wall 21213 is symmetrically arranged on both sides of the second body 2 in the axial direction. When the brush head assembly 11 is not rotated to the position, the driving shaft 32 can slide into the second assembly groove 2121 along the guide wall 21213. At this time, the transmission assembly 21 is also rotated by the rotation force of the driving shaft 32, so that the second assembly groove 2121 is matched with the driving shaft 32. The guide wall 21213 can effectively avoid the situation that the driving shaft 32 cannot be inserted into the second assembly groove 2121, thereby avoiding the problem that the toothbrush head and the toothbrush body 3 cannot be installed.

[0142] Specifically, in the present application, the driving shaft 32 is only connected with the second assembly groove 2121 of the transmission assembly 21 which rotates 180 degrees around the second body 2. Sometimes, the angle of the transmission assembly 21 rotating around the second body 2 is greater than or less than 180 degrees, that is, the driving shaft 32 is at a certain angle from the second assembly groove 2121, and the second assembly groove 2121 and the driving shaft 32 can not be matched, so a guide wall 21213 is arranged at the end of the second assembly groove 2121 away from the brush head assembly 11, and the driving shaft 32 can drive the transmission assembly 21 to rotate correspondingly, so that the second assembly groove 2121 and the driving shaft 32 are matched. The guide wall 21213 is inclinedly arranged at the end of the first fixed wall 21211 of the second assembly groove 2121 away from the brush head assembly 11, and the driving shaft 32 is limited to contact the guide wall 21213 and then enter the second assembly groove 2121 to abut against the first fixed wall 21211 and the second fixed wall 21212. However, the rotation of the brush head assembly 11 cannot be truly rotated 180 degrees sometimes, so that the second assembly groove 2121 and the driving shaft 32 can not be matched, and the guide wall 21213 is needed to rotate the damping member and the brush head assembly 11, so that the second assembly groove 2121 and the driving shaft 32 are matched. A pair of guide walls 21213 extend from the end of the first fixed wall 21211 away from the brush head assembly 11 to the side away from each other along the axis of the second body 2, so that the guide wall 21213 is inclinedly arranged. When the driving shaft 32 abuts against the guide wall 21213, a rotating force can be provided for the transmission assembly 21 to rotate. It is worth noting that the inclination angle and direction of the guide wall 21213 are not limited in the present application, as long as the guide wall 21213 can drive the transmission assembly 21 to rotate a certain angle around the second body 2.

[0143] Embodiment four: referring to FIG. 8, the toothbrush head comprises a second body 2, a brush head assembly 11 and a damping assembly; the brush head assembly 11 is arranged at one end of the second body 2, a transmission assembly 21 is coaxially arranged in the second body 2, and the transmission assembly 21 is adapted to connect the brush head assembly 11 and a driving shaft 32 of the toothbrush body; the damping assembly is arranged between the transmission assembly 21 and the second body 2, so that the transmission assembly 21 and the second body 2 are not in direct contact.

[0144] In the present embodiment, the transmission assembly 21 and the second body 2 are not in direct contact, the transmission assembly 21 is suspended in the second body 2, the transmission assembly 21 is prevented from colliding with the second body 2, the vibration transmission efficiency of the transmission assembly 21 is high, and the noise is small; the damping assembly softly contacts the transmission assembly 21 and the second body 2, so that the vibration of the transmission assembly 21 is not transmitted to the second body 2, the user's mouth is not numb, and the use experience is better.

[0145] Specifically, the second body 2 and the brush head assembly 11 are spaced apart, i.e. a gap is left between the end of the second body 2 and the end of the brush head assembly 11, so that the vibration of the brush head assembly 11 is not transmitted to the second body 2. The connection of the brush head assembly 11 and the drive shaft 32 of the toothbrush body is directly through the transmission assembly 21, which is at least partially located inside the second body 2. The second body 2 is provided with a first hole 231 and a second hole 232 at the two axial ends respectively. The transmission assembly 21 inside the second body 2 is adapted to connect the brush head assembly 11 after penetrating through the first hole 231, and the drive shaft 32 is adapted to connect the end of the transmission assembly 21 away from the brush head assembly 11 after penetrating through the second hole 232. The end of the transmission assembly 21 away from the brush head assembly 11 is provided with a second assembly groove 2121, and the drive shaft 32 is adapted to be inserted into the second assembly groove 2121 and connected to the transmission assembly 21. Since the transmission assembly 21 is arranged inside the second body 2, the transmission assembly 21 can also transmit the vibration of the drive shaft 32 to the brush head assembly 11, so the transmission assembly 21 needs to leave a corresponding gap with the second body 2 to prevent the transmission assembly 21 from colliding or rubbing with the second body 2 when vibrating, resulting in vibration loss and noise of the transmission assembly 21. Therefore, the present application is provided with a damping assembly between the transmission assembly 21 and the second body 2, which suspends the transmission assembly 21 inside the second body 2, i.e. the transmission assembly 21 does not directly contact the second body 2. Referring to FIG. 3, the damping assembly is arranged between the transmission assembly 21 and the second body 2. Since the damping assembly has a certain elasticity, the transmission assembly 21 and the second body 2 are partially soft-contacted, and the other part is left with a gap with the second body 2, so as to realize the non-direct contact between the transmission assembly 21 and the second body 2.

[0146] In more detail, in the embodiment, the cross section of the second body 2 gradually decreases from the end far away from the brush head assembly 11 to the end close to the brush head assembly 11 along the axial direction of the second body 2, and the transmission assembly 21 is coaxially arranged inside the second body 2, so in the embodiment, the gap between the transmission assembly 21 and the second body 2 gradually increases from the end close to the brush head assembly 11 to the end far away from the brush head assembly 11, and the maximum and most likely contact position between the transmission assembly 21 and the second body 2 is at the corresponding position of the first hole 231 of the second body 2 and the transmission assembly 21, and the contact probability at this position is eliminated, so that the gap between the transmission assembly 21 and the other positions of the second body 2 is arranged. Therefore, the damping assembly includes a first damping member 24, which is arranged between the first hole 231 of the second body 2 and the transmission assembly 21. When the drive shaft 32 of the toothbrush body is inserted into the second assembly groove of the transmission assembly 21, the drive shaft 32 will give the transmission assembly 21 an axial force, and the first damping member 24 is arranged outside the transmission assembly 21, and the first damping member 24 is easy to slide on the transmission assembly 21, so that the connection position between the first damping member 24 and the second body 2 deviates, which causes it to fail to achieve the purpose of soft contact between the transmission assembly 21 and the first hole 231. Therefore, the transmission assembly 21 is provided with a damping groove 2110 at the corresponding position of the first hole 231, and the first damping member 24 is arranged in the damping groove 2110, so as to prevent the first damping member 24 from relatively sliding on the transmission assembly 21, which causes the first damping member 24 to lose its original function, resulting in misalignment or abnormal sound of the transmission assembly 21. Preferably, the first damping member 24 includes a first damping portion 241, which is arranged between the groove bottom of the damping groove 2110 and the inner side wall of the first hole 231, and the other parts of the transmission assembly 21 inside the second body 2 are arranged at intervals with the inner side wall of the second body 2. Specifically, the first damping portion 241 is arranged in the damping groove 2110 and abuts against the inner side wall of the first hole 231, and the first damping portion 241 can solve the direct contact between the outer side wall of the transmission assembly 21 and the inner side wall of the second body 2, and can avoid the radial impact and vibration transmission between the transmission assembly 21 and the second body 2, so that the transmission assembly 21 and the second body 2 are not in direct radial contact.

[0147] Further, referring to FIGS. 10 and 13, the end of the first hole 231 far away from the brush head assembly 11 is further provided with a first abutting wall 2311, the side of the damping groove 2110 far away from the brush head assembly 11 is provided with a second abutting wall 2111, and the first damping member 24 further includes a second damping portion 242, and the first damping portion 241 is arranged on the side far away from the brush head assembly 11 and located between the second abutting wall 2111 of the damping groove 2110 and the first abutting wall 2311 of the first hole 231.

[0148] In this embodiment, the second abutting wall 2111 of the damping groove 2110 and the first abutting wall 2311 of the first hole 231 are provided with a second damping part 242, which can avoid the axial impact and vibration transmission between the transmission assembly 21 and the second body 2, so that the transmission assembly 21 and the second body 2 are not in direct contact in the axial direction.

[0149] Specifically, the first abutting wall 2311 is arranged at the end of the first hole 231 away from the brush head assembly 11 and is located inside the second body 2. The second abutting wall 2111 is arranged at the side of the damping groove 2110 away from the brush head assembly 11 and is located inside the second body 2. When the drive shaft 32 of the toothbrush body is inserted into the second assembly groove of the transmission assembly 21, the drive shaft 32 will give the transmission assembly 21 an axial force, driving the transmission assembly 21 to press towards the side close to the brush head assembly 11. At this time, the second abutting wall 2111 of the damping groove 2110 is easy to directly impact and transmit vibration with the first abutting wall 2311 of the first hole 231. Therefore, the second damping part 242 is arranged between the side wall of the damping groove 2110 of the transmission assembly 21 and the end of the first hole 231. It is worth noting that the second damping part 242 can also be understood as an extension of the first damping part 241 away from the brush head assembly 11 in the radial direction of the second body 2 away from the side of the transmission assembly 21, and the second damping part 242 does not exceed the damping groove 2110 of the transmission assembly 21, that is, there is also a gap between the end of the second damping part 242 and the inner side wall of the second body 2.

[0150] Further, the end of the first hole 231 close to the brush head assembly 11 is provided with a third abutting wall 2312, and the side of the brush head assembly 11 close to the transmission assembly 21 is provided with a fourth abutting wall 1121. The third abutting wall 2312 and the fourth abutting wall 1121 are arranged at a distance from each other. The first damping part 24 further comprises a third damping part arranged at the end of the first damping part 241 close to the brush head assembly 11 and located between the third abutting wall 2312 and the fourth abutting wall 1121, so that the brush head assembly 11 and the second body 2 are not in direct contact.

[0151] In this embodiment, the third abutting wall 2312 of the first hole 231 and the fourth abutting wall 1121 of the brush head assembly 11 are provided with a third damping part, which can effectively reduce the risk of contact between the third abutting wall 2312 and the fourth abutting wall 1121 when the brush head assembly 11 vibrates, and avoid mutual impact and vibration transmission between the third abutting wall 2312 and the fourth abutting wall 1121.

[0152] Specifically, the third abutting wall 2312 is arranged at one end of the first hole 231 close to the brush head assembly 11 and opposite to the outer end of the second body 2, and the fourth abutting wall 1121 is arranged at one side of the brush head assembly 11 close to the transmission assembly 21. A gap is left between the third abutting wall 2312 and the fourth abutting wall 1121, so that the brush head assembly 11 and the second body 2 are arranged separately, and the vibration of the brush head assembly 11 will not be transmitted to the second body 2, avoiding the second body 2 from vibrating and causing the user to feel uncomfortable. The function of the third damping part is to reduce the risk of contact between the third abutting wall 2312 and the fourth abutting wall 1121 when the brush head assembly 11 vibrates, avoiding mutual impact and vibration transmission between the third abutting wall 2312 and the fourth abutting wall 1121, and ensuring the segmented structure of the brush head assembly 11 and the second body 2.

[0153] It is worth noting that the first damping member 24 can also not be provided with the third damping part, and a sufficient gap can be left between the third abutting wall 2312 and the fourth abutting wall 1121. The third damping part can also be arranged on the first body 1, and the first body 1 extends radially inward along the second body 2 and forms the third damping part. The third damping part can be directly connected with the first damping part 241, or can not be connected, that is, the first damping member 24 and the first body 1 can be arranged integrally or separately, which is not limited in the present application, and all of them are within the protection scope of the present application.

[0154] Further, referring to FIGS. 11 and 13, the second damping member 25 is further included, and the second damping member 25 is arranged at one end of the transmission assembly 21 away from the brush head assembly 11. The second damping member 25 includes a fourth damping part 251 arranged between the outer side wall of the transmission assembly 21 and the inner side wall of the second body 2.

[0155] In the embodiment, the fourth damping part 251 is arranged between the outer side wall of the end of the transmission assembly 21 and the inner side wall of the second body 2, which can effectively reduce the risk of impact between the end of the transmission assembly 21 away from the brush head assembly 11 and the inner side wall of the second body 2, and the transmission assembly 21 does not contact the second body 2, and the damping effect of the transmission assembly 21 is better.

[0156] Specifically, the cross section of the second body 2 gradually decreases from the end away from the brush head assembly 11 to the end close to the brush head assembly 11 along the axial direction of the second body 2. In theory, the gap between the end of the transmission assembly 21 away from the brush head assembly 11 and the inner side wall of the second body 2 is sufficient. However, during the process of connecting the drive shaft 32 to the transmission assembly 21, the end of the transmission assembly 21 away from the brush head assembly 11 may be misaligned or the like, causing the transmission assembly 21 to hit the second body 2. The fourth damping part 251 can prevent these risks, so the fourth damping part 251 mainly plays a preventive role. The outer side wall of the transmission assembly 21 is also provided with a fixing block, and the fourth damping part 251 of the second damping part 25 is also provided with a fixing groove. The fixing block is abutted and fixed in the fixing groove, so that the transmission assembly 21 and the fourth damping part 251 are fixedly installed. Of course, the positions of the fixing block and the fixing groove can also be replaced with each other, and a plurality of fixing blocks and fixing grooves can also be provided, as long as the second damping part 25 can be fixedly arranged on the outer side wall of the transmission assembly 21.

[0157] It is worth noting that the first damping part 24 and the second damping part 25 are respectively arranged at the axial two ends of the hard rubber coating 2120. In a transformed embodiment, the transmission assembly 21 can also be a whole, the transmission assembly 21 is coaxially arranged with the second body 2 and a gap is left between the inner side wall of the transmission assembly 21, the transmission assembly 21 is directly drivingly connected to the drive shaft 32 of the brush head assembly 11 and the toothbrush body. At this time, the transmission assembly 21 is preferably metal, and it can also be a hard material such as POM. The difference between this embodiment and the last embodiment is that the material of the transmission assembly 21 in this embodiment is one, that is, the transmission assembly 21 is a whole.

[0158] Further, the end of the second body 2 away from the brush head assembly 11 is also provided with a shaft sleeve 22, the shaft sleeve 22 is arranged on the side of the transmission assembly 21 away from the brush head assembly 11, and the shaft sleeve 22 is suitable for being fixedly connected with the connecting seat 31 of the toothbrush body; the end of the transmission assembly 21 away from the brush head assembly 11 is provided with a fifth abutting wall 2122, the end of the shaft sleeve 22 close to the brush head assembly 11 is provided with a sixth abutting wall 223, and the second damping part 25 further includes a fifth damping part 252, the fifth damping part 252 is arranged at the end of the fourth damping part 251 close to the shaft sleeve 22 and is located between the fifth abutting wall 2122 and the sixth abutting wall 223, so that the transmission assembly 21 does not directly contact the shaft sleeve 22.

[0159] In this embodiment, the fifth damping part 252 is arranged between the fifth abutting wall 2122 of the transmission assembly 21 and the sixth abutting wall 223 of the shaft sleeve 22, avoiding direct contact and vibration transmission between the shaft sleeve 22 and the transmission assembly 21, so that the transmission assembly 21 does not directly contact the second body 2 and the shaft sleeve 22, the vibration attenuation of the transmission assembly 21 is less, and the vibration transmission efficiency is higher.

[0160] Specifically, the connecting seat 31 of the toothbrush body is adapted to be fixedly connected with the shaft sleeve 22 in the second body 2, so that the driving shaft 32 of the toothbrush body passes through the one end opening of the second body 2 and the shaft sleeve 22 and is connected in the second assembly groove of the transmission assembly 21, so that the transmission assembly 21 is hard connected with the driving shaft 32, and the driving shaft 32 directly transmits the vibration to the transmission assembly 21. During the installation of the shaft sleeve 22 and the connecting seat 31 of the toothbrush body, the connecting seat 31 can drive the shaft sleeve 22 to move axially and abut against the transmission assembly 21, so it is necessary to provide the fifth damping part 252 between the fifth abutting wall 2122 of the transmission assembly 21 and the sixth abutting wall 223 of the shaft sleeve 22, so as to eliminate the risk of abutting or impacting. The fifth damping part 252 can also be understood as extending inward along the radial direction of the second body 2 from the one end of the fourth damping part 251 away from the brush head assembly 11, and an opening is further provided in the middle of the fifth damping part 252, which facilitates the driving shaft 32 to pass through. In the present application, the fifth damping part 252 is sleeved on the one end of the hard rubber coating 2120 away from the brush head assembly 11.

[0161] It is worth noting that a third damping part is also included, which connects the first damping part 24 and the second damping part 25 away from each other, so that the damping assembly is arranged outside all parts of the transmission assembly 21 located inside the second body 2, so that all parts of the transmission assembly 21 located inside the second body 2 are not in direct contact with the second body 2. It is worth noting that in the deformed embodiment, any two or three of the first damping part 24, the second damping part 25 and the third damping part are also an integral whole.

[0162] Embodiment five: with reference to FIGS. 1, 6 and 7, the present application also provides an electric toothbrush, which comprises the toothbrush head and the toothbrush body 3 in any of the above embodiments, the toothbrush body 3 is provided with a driving shaft 32 and a connecting seat 31, the second body 2 of the electric toothbrush head is adapted to be sleeved on the connecting seat 31 and tightly fit with the toothbrush body 3, and the driving shaft 32 penetrates through the connecting seat 31 and is adapted to be in transmission connection with the transmission assembly 21 of the electric toothbrush head.

[0163] In the present embodiment, the electric toothbrush adopts a segmented toothbrush head, and the scientific damping structure of the segmented toothbrush head ensures that the bristles 113 vibrate strongly while the unnecessary shaking of the second body 2 of the toothbrush head is almost zero, which significantly reduces the impact of the second body 2 on the gums, teeth and oral cavity, and creates a more comfortable tooth brushing experience; at the same time, the second body 2 is sleeved on the connecting seat 31 and tightly fit with the toothbrush body 3, which reduces the gap between the second body 2 and the toothbrush body 3 and increases the waterproof performance.

[0164] [Corrected according to Rule 91 on 30.05.2025] Embodiment six: referring to FIGS. 14-20, the toothbrush body includes a handle 34, a driving member 35, and an elastic assembly; the handle 34 is provided with a first channel 341 at one end, and the handle 34 is provided with a mounting seat 343 inside, and the mounting seat 343 is provided with a second channel 342 coaxially arranged with the first channel 341; the driving member 35 is mounted on the mounting seat 343, and the driving shaft 32 of the driving member 35 is adapted to pass through the second channel 342 and the first channel 341 and then connect the toothbrush head; the elastic assembly includes a first elastic member 36, which is arranged between the driving member 35 and the mounting seat 343, so that the driving member 35 and the mounting seat 343 are not in direct contact.

[0165] In this embodiment, the first elastic member 36 is arranged between the driving member 35 and the mounting seat 343, so that the driving member 35 and the mounting seat 343 are not in direct contact, the driving member 35 is suspended inside the handle 34, the vibration transmission between the driving member 35 and the mounting seat 343 is avoided, the vibration transmission efficiency of the driving member 35 to the toothbrush head is improved, the friction between the driving member 35 and the mounting seat 343 is reduced, and the noise is small; moreover, the vibration of the driving member 35 will not be transmitted to the handle 34 through the mounting seat 343, so that the vibration of the toothbrush body is very small, and the use experience is better.

[0166] Specifically, the handle body 34 is internally provided with a mounting seat 343 and a driving member 35, and the handle body 34 is provided with a first channel 341 at one end, and the inner side of the first channel 341 is provided with a connecting seat adapted to be fixedly connected with the shaft sleeve of the toothbrush head, and the inner side of the first channel 341 is adapted to pass through the driving shaft 32 of the driving member 35, and a gap is left between the driving shaft 32 and the inner side wall of the first channel 341, so that the driving shaft 32 does not collide with the first channel 341 when vibrating, that is, the driving shaft 32 is coaxially arranged in the first channel 341 and a gap is left between the driving shaft 32 and the inner side wall of the first channel 341. The mounting seat 343 is arranged at the end of the first channel 341 away from the toothbrush head and is located opposite in the handle body 34, and the mounting seat 343 is provided with a second channel 342 corresponding to the first channel 341, and the second channel 342 is coaxially arranged with the first channel 341, and a gap is left between the driving shaft 32 and the inner side wall of the second channel 342. The inner side wall of the side of the mounting seat 343 away from the first channel 341 is provided with a mounting groove 3430, and the elastic assembly includes a first elastic member 36 arranged in the mounting groove 3430, and the first elastic member 36 at least partially extends out of the slot of the mounting groove 3430 and is connected with the outer side wall of the driving member 35, so that the driving member 35 and the mounting seat 343 are arranged at a distance from each other, and at the same time, the driving member 35 and the mounting seat 343 are in soft contact due to the elasticity of the first elastic member 36, the friction coefficient between the driving member 35 and the mounting seat 343 is small, and no large noise occurs, and the vibration of the driving member 35 is not transmitted to the mounting seat 343 through the first elastic member 36. It is worth noting that when the driving member 35 vibrates, the first elastic member 36 can deform correspondingly to adapt to the vibration of the driving member 35, thereby solving the problem of direct contact and mutual friction between the mounting seat 343 and the driving member 35.

[0167] Further, referring to FIGS. 14-16, the mounting seat 343 includes a first seat body 3431 and a second seat body 3432, the first seat body 3431 is arranged axially along the handle body 34, and the second seat body 3432 is connected to the end of the first seat body 3431 away from the first channel 341 and is arranged radially along the handle body 34; the driving member 35 has a first connecting wall 351 corresponding to the first seat body 3431 and a second connecting wall 352 corresponding to the second seat body 3432; the first elastic member 36 includes a first elastic part 361 and a second elastic part 362, the first elastic part 361 is arranged between the first seat body 3431 and the first connecting wall 351, and the second elastic part 362 is arranged between the second seat body 3432 and the second connecting wall 352, so that the driving member 35 and the mounting seat 343 are not in direct contact.

[0168] In this embodiment, the first elastic part 361 is arranged between the first seat body 3431 and the first connecting wall 351, and the second elastic part 362 is arranged between the second seat body 3432 and the second connecting wall 352, so that the driving member and the mounting seat 343 are not in direct contact in the radial direction and the radial direction of the handle body 34.

[0169] Specifically, the driving member 35 has a first connecting wall 351 and a second connecting wall 352, the first connecting wall 351 is arranged axially along the handle body 34, the second connecting wall 352 is arranged radially along the handle body 34, the first connecting wall 351 and the second connecting wall 352 are connected perpendicularly, and the first connecting wall 351 is provided with a bearing. In the embodiment, the mounting seat 343 includes a first seat body 3431 and a second seat body 3432, the first seat body 3431 is arranged correspondingly to the first connecting wall 351, and the second seat body 3432 is arranged correspondingly to the second connecting wall 352. At this time, the end of the driving member 35 is convex, and the end of the mounting seat 343 away from the first channel 341 is concave. The first elastic member 36 includes a first elastic part 361 and a second elastic part 362, the first elastic part 361 and the second elastic part 362 are arranged in the mounting groove 3430 of the mounting seat 343 and at least partially protrude out of the mounting groove 3430, so that the driving member 35 is not in direct contact with the inner side wall of the mounting seat 343. The first elastic part 361 is arranged between the first seat body 3431 and the first connecting wall 351, so that the first seat body 3431 and the first connecting wall 351 are arranged at a distance from each other, thereby realizing that the first elastic member 36 and the mounting seat 343 are not in direct contact in the radial direction of the handle body 34. The second elastic part 362 is arranged between the second seat body 3432 and the second connecting wall 352, so that the second seat body 3432 and the second connecting wall 352 are arranged at a distance from each other, thereby realizing that the driving member 35 and the mounting seat 343 are not in direct contact in the axial direction of the handle body 34. At the same time, the second elastic part 362 causes the second seat body 3432 and the second connecting wall 352 to move away from each other and leave a gap in the axial direction of the handle body 34, so that a gap is also left between the end of the first connecting wall 351 close to the first channel 341 and the end of the first seat body 3431 close to the first channel 341. At this time, an elastic part can be arranged between the end of the first connecting wall 351 close to the first channel 341 and the end of the first seat body 3431 close to the first channel 341, or a gap can be left directly.

[0170] Preferably, the mounting seat 343 further includes a third seat body 3433, the third seat body 3433 is arranged axially along the handle body 34 and connects the end of the second seat body 3432 away from the first seat body 3431; the driving member 35 further includes a third connecting wall 353 corresponding to the third seat body 3433, and the first elastic member 36 further includes a third elastic part 363, the third elastic part 363 is arranged between the third seat body 3433 and the third connecting wall 353, so that the outer side wall of the driving member 35 is not in direct contact with the inner side wall of the handle body 34.

[0171] [Corrected according to Rule 91 on 30.05.2025] Further, referring to FIGS. 14 and 16, the handle body 34 is further provided with a placement bracket 37 on the side of the driving member 35 away from the first channel 341; the elastic assembly further comprises a second elastic member 38, which is arranged between the placement bracket 37 and the driving member 35, so that the driving member 35 is not in direct contact with the placement bracket 37.

[0172] In this embodiment, the two axial ends of the driving member 35 are respectively mounted through the mounting seat 343 and the placement bracket 37, so that the driving member 35 is coaxially arranged inside the handle body 34, and the mounting stability of the driving member 35 is higher; at the same time, the second elastic member 38 is also arranged between the placement bracket 37 and the driving member 35, so that the driving member 35 is not in direct contact with the placement bracket 37, and vibration of the driving member 35 is avoided from being transmitted to the placement bracket 37.

[0173] Specifically, the placement bracket 37 comprises a first bracket body 371 and a second bracket body 372, the first bracket body 371 is arranged outside the end of the driving member 35, and the second bracket body 372 is arranged outside the side wall of the driving member 35. The second elastic member 38 comprises a fourth elastic part 381 and a fifth elastic part 382, the fourth elastic part 381 is arranged between the first bracket body 371 and the end of the driving member 35, and the fifth elastic part 382 is arranged between the second bracket body 372 and the side wall of the driving member 35.

[0174] Preferably, the elastic assembly further comprises a third elastic member 39, which is arranged on the outer side wall of the driving member 35 and is located between the mounting seat 343 and the placement bracket 37, so that the outer side wall of the driving member 35 is not in direct contact with the inner side wall of the handle body 34.

[0175] In this embodiment, the third elastic member 39 is arranged on the outer side wall of the driving member 35 and is located between the mounting seat 343 and the placement bracket 37, so that the outer side wall of the driving member 35 is not in direct contact with the inner side wall of the handle body 34, and impact and vibration transmission between the outer side wall of the driving member 35 and the inner side wall of the handle body 34 are avoided.

[0176] Embodiment Seven: Referring to FIG. 17, the toothbrush body 3 is further provided with a water-blocking sealing ring 33, which is sleeved on the driving shaft 32 and is located below the connecting seat 31.

[0177] In this embodiment, the toothbrush body 3 is further provided with a water blocking sealing ring 33, which can prevent water from entering the toothbrush body 3 and improve the waterproof performance and safety performance of the toothbrush body 3. Specifically, the water blocking sealing ring 33 is arranged inside the toothbrush body 3 and located below the connecting seat 31, and the water blocking sealing ring 33 is sleeved outside the driving shaft 32. The handle body 34 is provided with a first channel 341 at one end, and a mounting seat 343 is adapted to be mounted inside the handle body 34. The mounting seat 343 is provided with a second channel 342 corresponding to the first channel 341, and the water blocking sealing ring 33 is sealingly arranged outside the driving shaft 32 and located at one end of the second channel 342 close to the first channel 341, so that the driving shaft 32 and the second channel 342 are sealingly arranged.

[0178] Specifically, the mounting seat 343 is arranged inside the handle body 34, the second channel 342 of the mounting seat 343 is coaxially arranged with the first channel 341 of the handle body 34, and the driving member 35 is mounted on the side of the mounting seat 343 away from the first channel 341. The driving shaft 32 of the driving member 35 is adapted to pass through the second channel 342 and the first channel 341 and then connect the transmission assembly 21 inside the toothbrush head.

[0179] More specifically, the mounting seat 343 includes a first assembly wall 345, which is arranged at the end of the second channel 342 close to the first channel 341 and is arranged along the radial direction of the handle body 34. The water blocking sealing ring 33 includes a first waterproof part 331, which is sealingly arranged outside the driving shaft 32 and sealingly connected to the end of the first assembly wall 345 close to the first channel 341, and is located between the first channel 341 and the second channel 342. The first waterproof part 331 has a through hole, which is adapted to pass through the driving shaft 32 and the inner side wall of the through hole is sealingly connected to the outer side wall of the driving shaft 32.

[0180] [Corrected according to Rule 91 on 30.05.2025] Further, referring to FIGS. 17 and 18, the inner side wall of the first waterproof part 331 is provided with a plurality of first waterproof protrusions 3311, which are arranged axially spaced apart along the handle body 34 and abut each other with the outer side wall of the driving shaft 32.

[0181] In this embodiment, the first waterproof protrusions 3311 sealingly connect the outer side wall of the driving shaft 32, and are arranged spaced apart, which can improve the difficulty of liquid penetration, increase the waterproof level between the first waterproof part 331 and the driving shaft 32, and avoid accidental liquid passing through the gap between the first waterproof part 331 and the driving shaft 32.

[0182] Further, the mounting seat 343 further comprises a second assembly wall 346, which is arranged axially along the handle body 34 on the side of the first assembly wall 345 close to the first passage 341, and the inner side wall of the second assembly wall 346 is arranged spaced apart from the outer side wall of the first waterproof part 331; the water-blocking sealing ring 33 further comprises a second waterproof part 332, which is connected to the first waterproof part 331 close to the first passage 341, and the second waterproof part 332 is sealingly arranged between the end of the first passage 341 close to the second passage 342 and the end of the second assembly wall 346 away from the second passage 342.

[0183] In this embodiment, the second waterproof part 332 is sealingly arranged between the end of the first passage 341 close to the second passage 342 and the end of the second assembly wall 346 away from the second passage 342, and the connection between the second passage 342 and the first waterproof part 331 is located at the rear side of the second waterproof part 332, so that the connection between the second passage 342 and the first waterproof part 331 is blocked from the first passage 341, avoiding liquid reaching the connection between the second passage 342 and the first waterproof part 331.

[0184] Specifically, the inner side wall of the first waterproof part 331 is in sealing abutment with the outer side wall of the drive shaft 32, but in order to reduce the vibration attenuation of the drive shaft 32, the outer side wall of the first waterproof part 331 and the inner side wall of the second assembly wall 346 are arranged to be spaced apart from each other, that is, when the outer side wall of the first waterproof part 331 and the inner side wall of the second assembly wall 346 are in abutment, the drive shaft 32 needs a larger force to compress the first waterproof part 331 to deform when the drive shaft 32 vibrates, which results in larger vibration attenuation of the drive shaft 32. Therefore, in the embodiment, the outer side wall of the first waterproof part 331 and the inner side wall of the second assembly wall 346 are arranged to be spaced apart from each other and not in contact with each other, and when the drive shaft 32 vibrates, the gap between the first waterproof part 331 and the second assembly wall 346 can provide a reserved space for the deformation of the first waterproof part 331, and the first waterproof part 331 can relatively approach or move away from the second assembly wall 346, without the need for a larger force to compress the first waterproof part 331, only a smaller deformation of the first waterproof part 331 is needed, which can effectively improve the vibration transmission of the drive shaft 32. However, the gap between the outer side wall of the first waterproof part 331 and the inner side wall of the second assembly wall 346 also allows liquid to pass through the gap between the first waterproof part 331 and the second assembly wall 346 to the abutment position of the first waterproof part 331 and the first assembly wall 345, increasing the risk of liquid entering the second channel 342. Moreover, during the process of the first waterproof part 331 approaching or moving away from the second assembly wall 346, the end of the first waterproof part 331 is also likely to accidentally move away from the end of the second channel 342, so that the second channel 342 cannot effectively achieve sealing. At this time, only the abutment of the end of the first waterproof part 331 away from the first channel 341 and the first assembly wall 345 cannot form an effective sealing effect. Therefore, in the embodiment, the second waterproof part 332 is arranged on the side of the first waterproof part 331 close to the first channel 341, and the second waterproof part 332 is arranged in sealing abutment between the end of the first channel 341 close to the second channel 342 and the end of the second assembly wall 346 away from the second channel 342, which can effectively prevent liquid from passing through the gap between the second assembly wall 346 and the first waterproof part 331, ensuring the vibration transmission efficiency of the drive shaft 32 while improving its waterproof performance. At the same time, the second waterproof part 332 is arranged between the mounting seat 343 and the inner side wall of the handle body 34, which can also reduce the impact between the mounting seat 343 and the handle body 34 and avoid the vibration transmission between the mounting seat 343 and the handle body 34.

[0185] Further, the inner side of the handle body 34 is also provided with a mounting ring wall 344, and the second assembly wall 346 of the mounting seat 343 is adapted to abut and mount with the mounting ring wall 344; the water-blocking sealing ring 33 further comprises a third waterproof part 333, which is arranged at the end of the second waterproof part 332 away from the first waterproof part 331 and is sealingly arranged between the second assembly wall 346 and the mounting ring wall 344.

[0186] In the embodiment, the mounting seat 343 is abutted and mounted in the mounting ring wall 344, and the third waterproof part 333 is sealingly arranged between the inner side wall of the mounting ring wall 344 and the outer side wall of the second assembly wall 346. At this time, the first waterproof part 331, the second waterproof part 332 and the third waterproof part 333 completely wrap the second assembly wall 346, so that the space between the second assembly wall 346 and the driving shaft 32 is completely sealed, that is, the end of the second channel 342 close to the first channel 341 is completely sealed, which can effectively improve the waterproof capability of the water blocking seal ring 33 and reduce the risk of liquid penetration.

[0187] Specifically, the third waterproof part 333 is arranged on the outer side wall of the second assembly wall 346, the second waterproof part 332 is arranged on the end of the second assembly wall 346, and the first waterproof part 331 is arranged on the inner side of the second assembly wall 346, so that the inner side of the second assembly wall 346 is separated from the outside. On the one hand, the sealing connection between the mounting seat 343 and the mounting ring wall 344 reduces the risk of liquid penetration, and on the other hand, the elastic connection between the mounting seat 343 and the mounting ring wall 344 avoids the transmission of vibration on the mounting seat 343 to the handle body 34 and reduces the abnormal movement and abnormal sound between the mounting seat 343 and the mounting ring wall 344. Preferably, the third waterproof part 333 is provided with a plurality of second waterproof protrusions 3331 on the outer side wall, and the plurality of second waterproof protrusions 3331 are arranged at intervals along the axial direction of the handle body 34 and abut against the inner side wall of the mounting ring wall 344.

[0188] [Corrected according to Rule 91 on 30.05.2025] Further, referring to FIG. 18, the mounting seat 343 further includes a third assembly wall 347 arranged on the side of the second assembly wall 346 away from the first channel 341 along the radial direction of the handle body 34; and the first waterproof part 331 further includes a fourth waterproof part 334 arranged at the end of the third waterproof part 333 away from the second waterproof part 332 and sealingly arranged between the end of the mounting ring wall 344 away from the first channel 341 and the third assembly wall 347.

[0189] In the embodiment, the fourth waterproof part 334 is arranged between the end of the mounting ring wall 344 away from the first channel 341 and the third assembly wall 347, which can avoid liquid from other directions entering the gap between the third waterproof part 333 and the second assembly wall 346; at the same time, it can also avoid the liquid in the first channel 341 from reaching the inside of the handle body 34 through the gap between the mounting ring wall 344 and the first assembly wall 345, thereby avoiding damage to the electronic components inside the handle body 34, and also avoiding the impact between the third assembly wall 347 and the mounting ring wall 344 and reducing the transmission of vibration of the mounting seat 343.

[0190] Specifically, the fourth waterproof part 334 is arranged at one end of the third waterproof part 333 away from the second waterproof part 332 and is sealingly arranged between the mounting ring wall 344 and the third assembly wall 347 away from the first channel 341, so as to avoid liquid from penetrating into the handle body 34 and causing safety hazards to the electronic components and improve the overall waterproof performance of the inside of the handle body 34. The mounting seat 343 further comprises a first seat body 3431, which is arranged on one side of the third assembly wall 347 away from the second assembly wall 346 in the axial direction of the handle body 34; the first waterproof part 331 further comprises a fifth waterproof part 335, which is arranged at one end of the fourth waterproof part 334 away from the third waterproof part 333 and is located between the inner side wall of the handle body 34 and the outer side wall of the first seat body 3431. The fifth waterproof part 335 is arranged between the inner side wall of the handle body 34 and the outer side wall of the first seat body 3431, which increases the difficulty of penetration and makes the end of the mounting seat 343 close to the first channel 341 completely sealed with the handle body 34. At the same time, the fifth waterproof part 335 can also effectively avoid the impact between the mounting seat 343 and the inner side wall of the handle body 34.

[0191] Further, the mounting seat 343 further comprises a second seat body 3432, which is connected to one end of the first seat body 3431 away from the third assembly wall 347 in the radial direction of the handle body 34, and the second seat body 3432 is provided with a fixing hole 34321 adapted to be fixedly connected with the driving member 35.

[0192] In this embodiment, the second seat body 3432 is provided with a fixing hole 34321, and the fixing hole 34321 is adapted to place a fixing member and fixedly connect with the driving member 35. The mounting mode of the mounting seat 343 and the driving member 35 is not limited further in the present application, which is a common technique in the art and is within the scope of protection of the present application. Meanwhile, the mounting seat 343 further comprises a third seat body 3433, which is arranged at one end of the second seat body 3432 away from the first seat body 3431 in the axial direction of the handle body 34 and is located between the outer side wall of the driving member 35 and the inner side wall of the handle body 34, so that the inner side wall of the handle body 34 and the outer side wall of the driving member 35 are arranged apart from each other to avoid impact between the driving member 35 and the handle body 34.

[0193] [Corrected according to Rule 91 on 30.05.2025] Embodiment eight: referring to FIGS. 19 and 20, the shaft sleeve 22 is arranged at one end of the second body 2, and a pair of elastic clamping blocks 222 are arranged on both sides of the shaft sleeve 22; the connecting seat 31 is arranged at the top of the toothbrush body 3, and a fixed clamping block 313 is arranged on the outer side wall of the connecting seat 31; the projection of the elastic clamping block 222 on the connecting seat 31 at least partially overlaps the fixed clamping block 313; during the clamping process of the shaft sleeve 22 and the connecting seat 31, the pair of elastic clamping blocks 222 at least partially abut against the fixed clamping block 313 at all times, so that the second body 2 is adapted to be inserted and pulled out at any angle in the connecting seat 31 of the toothbrush body 3.

[0194] In this embodiment, the elastic clamping blocks 222 at least partially overlap the fixed clamping blocks 313 within the projection range of the connecting seat 31, so that a pair of elastic clamping blocks 222 always at least partially abut the fixed clamping blocks 313, no matter what the rotation angle of the second body 2 is. The elastic clamping blocks 222 can form a reliable connection relationship with the fixed clamping blocks 313, thereby ensuring that the second body 2 can be smoothly inserted and pulled out of the connecting seat 31 of the toothbrush body 3 at any angle. The user does not need to accurately align the angle of the second body 2, and can easily complete the replacement of the toothbrush head, simplifying the installation and disassembly process of the toothbrush head, improving the flexibility and convenience of use, and significantly improving the user experience.

[0195] Specifically, the present application aims to solve the problems of complex operation, easy loosening, and inability of the second body 2 to connect with the toothbrush body 3 at any angle during the insertion and pulling process of the segmented toothbrush head, while improving the user experience. The shaft sleeve 22 is arranged at the end of the second body 2, and a pair of elastic clamping blocks 222 are arranged on both sides thereof. In the present application, the shaft sleeve 22 is axially provided with a mounting hole 2222, the connecting seat 31 is adapted to be inserted into the mounting hole 2222, and the mounting hole 2222 is symmetrically provided with elastic grooves on both sides, and the elastic clamping blocks 222 are arranged in the elastic grooves.

[0196] The connecting seat 31 is arranged at the top of the toothbrush body 3, and a fixed clamping block 313 is arranged on the outer side wall thereof. The elastic clamping blocks 222 at least partially overlap the fixed clamping blocks 313 within the projection range of the connecting seat 31, and a pair of elastic clamping blocks 222 always at least partially abut the fixed clamping blocks 313, not only providing reliable connection stability, but also allowing the second body 2 to be smoothly inserted and pulled out of the connecting seat 31 of the toothbrush body 3 at any rotation angle. The shaft sleeve 22 of the second body 2 can be adapted to any angle of insertion and pulling, greatly simplifying the installation and disassembly process of the toothbrush head. The user does not need to accurately align the angle of the second body 2, and can easily complete the replacement of the toothbrush head, improving the flexibility and convenience of use. This design is especially suitable for use in environments with dim light or limited operation space, and can significantly improve the user experience.

[0197] [According to Rule 91, corrected on 30.05.2025] Further, a pair of elastic clamping blocks 222 are symmetrically arranged on both sides of the shaft sleeve 22, the included angle between the two ends of a pair of elastic clamping blocks 222 that are close to each other in the circumferential direction of the shaft sleeve 22 is a first included angle, the included angle between the two ends of the fixed clamping block 313 that are away from each other in the circumferential direction of the connecting seat 31 is a second included angle, and the first included angle is smaller than the second included angle, so that the circumference of the fixed clamping block 313 is always greater than the maximum circumference of the pair of elastic clamping blocks 222.

[0198] In this embodiment, the circumference of the fixed clamping block 313 is always greater than the maximum circumference of the elastic clamping block 222, and the elastic clamping block 222 can always maintain at least partial abutting relationship when interacting with the fixed clamping block 313, which not only provides stable connection force for the plugging process, but also ensures that the second body 2 can be smoothly plugged into the connecting seat 31 of the toothbrush body 3 at any angle, without jamming or loosening.

[0199] Specifically, the pair of elastic clamping blocks 222 are symmetrically arranged on both sides of the shaft sleeve 22, which not only ensures the balance of the structure, but also makes the stress more uniform. Moreover, the spacing distance between the pair of elastic clamping blocks 222 is equal, so as to compare the spacing distance between the pair with the circumferential length of the fixed clamping block 313, so that the pair of elastic clamping blocks 222 and the fixed clamping block 313 always at least partially overlap each other. Specifically, the included angle between the pair of elastic clamping blocks 222 at the end of the shaft sleeve 22 close to each other in the circumferential direction is defined as a first included angle. At the same time, the included angle between the fixed clamping blocks 313 on the connecting seat 31 at the two ends of the connecting seat 31 away from each other in the circumferential direction is defined as a second included angle. The first included angle is set to be smaller than the second included angle, which ensures that the circumference of the fixed clamping block 313 is always greater than the maximum circumference of the pair of elastic clamping blocks 222, thereby providing stable support during plugging. Preferably, the first included angle is 110°-130°, and the second included angle is 150°-170°, so that the interaction between the elastic clamping block 222 and the fixed clamping block 313 is more efficient. It is worth noting that because the pair of elastic clamping blocks 222 are symmetrically arranged on both sides of the shaft sleeve 22, as long as the elastic clamping block 222 has a certain circumferential length, the first included angle between the pair of elastic clamping blocks 222 is definitely less than 180°. Therefore, the second included angle of the fixed clamping block 313 on the connecting seat 31 in the circumferential direction also does not necessarily have to be greater than 180°. Of course, the most optimal is that the second included angle of the fixed clamping block 313 on the connecting seat 31 in the circumferential direction is 360°, so that the contact area is larger and the stability is better. However, due to the limitations of injection molding process, the fixed clamping block 313 cannot be greater than 180°, but only the first included angle between the pair of elastic clamping blocks 222 can be reduced as much as possible, so that the first included angle between the pair of elastic clamping blocks 222 is less than the second included angle of the fixed clamping block 313 in the circumferential direction, that is, the spacing of the fixed clamping block 313 is greater than that of the elastic clamping block 222.

[0200] Further, the first included angle is 120°, and the second included angle is 160°, at least one fourth of the fixed clamping block 313 always abuts against the elastic clamping block 222.

[0201] In this embodiment, at least one fourth of the fixed clamping block 313 always abuts against the elastic clamping block 222, which can provide a larger contact area, thereby significantly improving the stability of the connection.

[0202] Specifically, the first included angle is 120°, so that the elastic clamping blocks 222 have appropriate spacing in the circumferential direction of the shaft sleeve 22, which not only ensures that the elastic clamping blocks 222 can smoothly enter and exit the range of the fixed clamping blocks 313 during plugging and unplugging, but also ensures that the elastic clamping blocks 222 can provide sufficient support force in the connected state. While the second included angle is 160°, the fixed clamping blocks 313 are always in contact with the portion of the elastic clamping blocks 222 that is spaced by 40°, and this contact portion accounts for one-fourth of the total area of the fixed clamping blocks 313. Further, referring to FIGS. 19-20, the connecting seat 31 is also provided with a first abutting block 314, which is arranged below the fixed clamping blocks 313, and a mounting groove 311 is formed between the first abutting block 314 and the fixed clamping blocks 313; the elastic clamping blocks 222 are adapted to be clamped and arranged in the mounting groove 311; the shaft sleeve 22 is also provided with a second abutting block 224, and the inner side wall of the second abutting block 224 is adapted to abut against the first abutting block 314.

[0203] In this embodiment, when the second abutting block 224 and the first abutting block 314 abut against each other, a stable support structure can be formed, which can effectively prevent the second body 2 from shaking left and right during use, thereby improving the stability and reliability of the entire toothbrush head plugging structure.

[0204] Specifically, the connecting seat 31 is also provided with a first abutting block 314, which is arranged below the fixed clamping blocks 313, and a mounting groove 311 is formed between the first abutting block 314 and the fixed clamping blocks 313, which provides a stable clamping position and more accurate positioning for the elastic clamping blocks 222. When the shaft sleeve 22 is inserted into the connecting seat 31, the elastic clamping blocks 222 can smoothly enter the mounting groove 311 and form a close clamping relationship with the fixed clamping blocks 313, thereby ensuring the firmness and reliability of the connection.

[0205] The bottom of the shaft sleeve 22 is provided with a second abutting block 224, and the inner side wall of the second abutting block 224 abuts the outer side wall of the first abutting block 314. When the second abutting block 224 and the first abutting block 314 are in contact with each other and form a stable support structure. No matter what the rotation angle of the toothbrush head is, the clamping relationship between the elastic clamping block 222 and the fixed clamping block 313 can remain stable, and the interaction between the second abutting block 224 and the first abutting block 314 further enhances the stability of the connection. The second abutting block 224 is circumferentially arranged around the shaft sleeve 22 to form a complete annular structure, so that the second abutting block 224 and the fixed clamping block 313 can always form the mounting groove 311, ensuring the uniform support and stability of the shaft sleeve 22 in the circumferential direction. The outer side wall of the second abutting block 224 is further provided with a first recess 221, and the inner side of the second body 2 is provided with a first protrusion 20. The first protrusion 20 of the second body 2 is adapted to abut and be fixed in the first recess 221 of the second abutting block 224, so that the shaft sleeve 22 can rotate with the second body 2, realizing the firm connection between the second body 2 and the shaft sleeve 22, and allowing the shaft sleeve 22 to rotate synchronously with the second body 2.

[0206] [Corrected according to Rule 91 on 30.05.2025] Preferably, with reference to FIG. 20, the outer side wall of the first abutting block 314 comprises a first guide wall 3131, a smooth wall 3132 and a second guide wall 3133 arranged from top to bottom, the first guide wall 3131 extends along the central axis of the connecting seat 31 to the side away from the connecting seat 31, the smooth wall 3132 connects the end of the first guide wall 3131 and the beginning of the second guide wall 3133, and the smooth wall 3132 is relatively parallel to the central axis of the connecting seat 31, and the second guide wall 3133 extends along the central axis of the connecting seat 31 to the side close to the connecting seat 31.

[0207] In this embodiment, the outer side wall of the first abutting block 314 comprises a first guide wall 3131, a smooth wall 3132 and a second guide wall 3133 arranged from top to bottom, which not only optimizes the plugging process, but also improves the stability and service life of the connection between the entire toothbrush head and the toothbrush body 3.

[0208] Specifically, the first guide wall 3131 extends along the central axis of the connecting seat 31 to the side away from the connecting seat 31 in an arc shape, which helps guide the elastic clamping block 222 of the shaft sleeve 22 to smoothly deform elastically and enter when inserted into the mounting groove 311 of the connecting seat 31, reduces the resistance and friction in the insertion process, and improves the convenience of plugging operation. The smooth wall 3132 is connected to the end of the first guide wall 3131 and the beginning of the second guide wall 3133, and the second guide wall 3133 extends along the central axis of the connecting seat 31 to the side close to the connecting seat 31 in an arc shape. The second guide wall 3133 can reset the elastic clamping block 222 on the shaft sleeve 22, ensure that the elastic clamping block 222 of the shaft sleeve 22 can slowly reset and be inserted into the mounting groove 311 of the connecting seat 31, and ensure the close fit between the shaft sleeve 22 and the connecting seat 31, avoid the elastic clamping block 222 quickly resetting and hitting the connecting seat 31, and further enhance the stability and reliability of the connection.

[0209] Further, the shaft sleeve 22 further comprises third abutting blocks 225 symmetrically arranged on the other two sides of the mounting hole 2222, and the symmetry lines of the third abutting blocks 225 are perpendicular to the symmetry line of the elastic clamping block 222. The third abutting blocks 225 are adapted to abut with the top of the connecting seat 31.

[0210] In this embodiment, the shaft sleeve 22 further comprises third abutting blocks 225, which provide additional stability and limiting function, avoid the connecting seat 31 from passing through the shaft sleeve 22 too much, and thus ensure the stability of the connection.

[0211] Specifically, the third abutting blocks 225 are symmetrically arranged on the other two sides of the mounting hole 2222, and the symmetry lines of the third abutting blocks 225 are perpendicular to the symmetry line of the elastic clamping block 222. The third abutting blocks 225 are adapted to abut with the top of the connecting seat 31. When the shaft sleeve 22 is inserted into the connecting seat 31, the contact between the third abutting blocks 225 and the top of the connecting seat 31 not only plays a limiting role, but also avoids the connecting seat 31 from passing through the shaft sleeve 22 too much.

[0212] Embodiment Nine:

[0213] Referring to FIG. 21 and FIG. 22, the application provides a charging bottom cover assembly, which comprises a base 4 and a bottom cover 5. The base 4 is fixedly arranged at the bottom of the handle main body. The base 4 is provided with a first clamping groove 41 and a second clamping groove 42. The second clamping groove 42 is suitable for installing a charging assembly 421. The bottom cover 5 comprises a first cover body 51 and a second cover body 52. The first cover body 51 is arranged at the top of the second cover body 52. The first cover body 51 is provided with a connecting part 511. The connecting part 511 is movably connected with the first clamping groove 41. The second cover body 52 is provided with a buckling groove 521. The first cover body 51 is provided with an elastic air hole 512 at the position corresponding to the buckling groove 521. The elastic air hole 512 can be automatically opened and closed to discharge the air between the base 4 and the bottom cover 5.

[0214] In this embodiment, the first cover body 51 of the bottom cover 5 is provided with an elastic air hole 512. The elastic air hole 512 can be automatically opened and closed to effectively discharge the residual air between the base 4 and the bottom cover 5, so as to ensure that the bottom cover 5 is closely attached to the base 4, thereby realizing smooth installation and avoiding the problem of shaking.

[0215] Specifically, the base 4 is provided with a first clamping groove 41 and a second clamping groove 42. The second clamping groove 42 is used for installing a charging assembly 421 to ensure the stability and safety of the charging assembly 421. The first clamping groove 41 is used for connecting the connecting part 511 of the bottom cover 5. The bottom cover 5 is composed of a first cover body 51 and a second cover body 52. The first cover body 51 is arranged at the top of the second cover body 52. The first cover body 51 is provided with a connecting part 511. The connecting part 511 is movably connected with the first clamping groove 41 of the base 4, which facilitates the installation and disassembly of the bottom cover 5. The second cover body 52 is provided with a buckling groove 521, which is used for cooperating with the structure of the first cover body 51 to enhance the overall stability. The first cover body 51 is provided with an elastic air hole 512 at the position corresponding to the buckling groove 521. The elastic air hole 512 can be automatically opened and closed. Its main function is to discharge the air between the base 4 and the bottom cover 5 during the installation of the bottom cover 5, so as to ensure that the bottom cover 5 is closely attached to the base 4, thereby avoiding the problem of uneven installation caused by residual air. The installation precision of the bottom cover 5 can be effectively improved. In addition, the electric toothbrush can be effectively prevented from shaking due to the unevenness of the bottom cover 5 during use.

[0216] Further, referring to FIG. 23 to FIG. 25, the first cover body 51 is made of soft rubber. The first cover body 51 is provided with a first bottom wall 5121 and a second bottom wall 5122 at the bottom of the elastic air hole 512. When there is no air between the bottom cover 5 and the base 4, the first bottom wall 5121 and the second bottom wall 5122 are closely attached to each other and close the elastic air hole 512. When there is air between the bottom cover 5 and the base 4, the first bottom wall 5121 and the second bottom wall 5122 are away from each other and open the elastic air hole 512.

[0217] In this embodiment, the first cover 51 made of soft rubber material realizes the automatic opening and closing function of the telescopic air hole 512 without complex mechanical structure, and has good elasticity and durability. Moreover, the first bottom wall 5121 and the second bottom wall 5122 arranged at the bottom of the telescopic air hole 512 can effectively reduce the thickness of the first cover 51 at the telescopic air hole 512, and the thinner first bottom wall 5121 and second bottom wall 5122 can respond to pressure changes more quickly, so that the telescopic air hole 512 can be quickly opened or closed when needed.

[0218] Specifically, the first cover 51 is made of soft rubber material, and the first bottom wall 5121 and the second bottom wall 5122 are arranged at the bottom of the telescopic air hole 512. When there is air between the bottom cover 5 and the base 4, the air pressure will make the first bottom wall 5121 and the second bottom wall 5122 move away from each other, thereby opening the telescopic air hole 512, discharging the internal air, and ensuring the close fit between the bottom cover 5 and the base 4, avoiding the problem of uneven installation caused by residual air. The first bottom wall 5121 and the second bottom wall 5122 are located at the bottom of the telescopic air hole 512, which can effectively reduce the thickness of the first cover 51 at the telescopic air hole 512, and the thinner first bottom wall 5121 and second bottom wall 5122 can respond to pressure changes more quickly, so that the telescopic air hole 512 can be quickly opened or closed when needed.

[0219] Preferably, referring to FIGS. 24 and 25, the first cover 51 is provided with an annular groove 513 at the bottom, the first bottom wall 5121 is arranged at the outer circle of the annular groove 513, and the second bottom wall 5122 is arranged at the inner circle of the annular groove 513; the second cover 52 is provided with an annular protrusion 522 at the top, and the annular protrusion 522 is adapted to abut against the annular groove 513; when there is no air between the bottom cover 5 and the base 4, the first bottom wall 5121 abuts against the annular protrusion 522 and closes the telescopic air hole 512; when there is air between the bottom cover 5 and the base 4, the first bottom wall 5121 moves away from the annular protrusion 522 and opens the telescopic air hole 512.

[0220] In this embodiment, the first bottom wall 5121 and the second bottom wall 5122 are located on both sides of the annular protrusion 522, and the first bottom wall 5121 abuts against or moves away from the annular protrusion 522 to open and close the telescopic air hole 512. When there is no air between the bottom cover 5 and the base 4, the end of the first bottom wall 5121 close to the annular protrusion 522 relatively moves away from the buckle groove 521, at this time the first bottom wall 5121 is located inside the second cover 52, which can effectively realize the sealing effect and prevent impurities from entering, and the telescopic air hole 512 cannot be seen on the bottom cover 5, which is more beautiful; when there is air between the bottom cover 5 and the base 4, the end of the first bottom wall 5121 away from the annular protrusion 522 relatively enters the range of the buckle groove 521 to realize the communication between the buckle groove 521 and the telescopic hole, which is convenient for discharging gas.

[0221] Specifically, the annular groove 513 and the annular protrusion 522 make the bottom cover 5 more closely fit the base 4. When there is no air between the bottom cover 5 and the base 4, the first bottom wall 5121 relatively far away from the end of the annular protrusion enters the range of the buckle slot 521, at this time the telescopic air hole 512 is completely hidden between the first cover body 51 and the second cover body 52, and the existence of the telescopic air hole 512 cannot be seen, so that the surface of the bottom cover 5 is more flat and beautiful. At the same time, the first bottom wall 5121 covers between the first cover body 51 and the second cover body 52, which can also effectively realize the sealing effect. When there is air between the bottom cover 5 and the base 4, the first bottom wall 5121 relatively far away from the end of the annular protrusion enters the range of the buckle slot 521, realizing the communication between the buckle slot 521 and the telescopic air hole 512, which can ensure the close fit between the bottom cover 5 and the base 4, avoid the problem of uneven installation caused by air remaining, and improve the stability and use experience of the product.

[0222] Notably, the first cover body 51 and the second cover body 52 are formed by double-color injection molding, and the second cover body 52 made of hard material ensures the overall structural strength and durability of the bottom cover 5. The first cover body 51 is further provided with a plurality of contact grooves 514 at the bottom, and the second cover body 52 is further provided with a plurality of contact columns 523 at the top, the contact columns 523 are adapted to be arranged in the contact grooves 514, further increasing the contact area of the first cover body 51 and the second cover body 52, making them more closely fit, and improving the connection strength.

[0223] [According to Rule 91 correction 30.05.2025] Further, referring to FIG. 22, the connecting part 511 is provided with a first connecting block 5111, the slot of the first clamping groove 41 is provided with a second connecting block 411, the outer side wall of the first connecting block 5111 is provided with a guide wall 5112, the guide wall 5112 extends along the insertion direction of the connecting part 511 to the side close to the central axis of the connecting part 511, and the connecting part 511 is adapted to be guided to insert into the first clamping groove 41 along the guide wall 5112, and the bottom of the first connecting block 5111 and the top of the second connecting block 411 are adapted to abut each other.

[0224] In this embodiment, the guide wall 5112 extends along the insertion direction of the connecting part 511 to the side close to the central axis of the connecting part 511, so that the first connecting block 5111 can be more smoothly guided to enter when inserted into the first clamping groove 41, reducing the resistance during assembly and improving the assembly efficiency; through the mutual abutment of the first connecting block 5111 and the second connecting block 411, the bottom cover 5 can be effectively prevented from being separated from the base 4 due to external force, and the firmness of the bottom cover 5 and the base 4 during use is ensured.

[0225] Specifically, the guide wall 5112 can automatically guide the first connecting block 5111 to be inserted into the second connecting block 411 inside the first clamping groove 41. When the bottom cover 5 needs to be disassembled, the first connecting block 5111 is relatively close to the second connecting block 411, and the bottom of the first connecting block 5111 abuts against the second connecting block 411, so that the bottom cover 5 is always connected to the base 4. The guide wall 5112 is also circumferentially spaced apart from a plurality of guide protrusions 5113, which also extend along the insertion direction of the connecting portion 511 to the side close to the axis of the connecting portion 511. The guide protrusions 5113 reduce the contact area between the first connecting block 5111 and the second connecting block 411, thereby reducing the friction during the process of the first connecting block 5111 entering the first clamping groove 41, making the assembly smoother; it can also more evenly distribute pressure and reduce local stress concentration, thereby improving the durability of the structure.

[0226] Further, referring to FIG. 21, the handle body inner side is also provided with a battery seat 6, which is fixedly arranged above the handle body, and the base 4 is adapted to be buckled with the battery seat 6.

[0227] Specifically, the battery seat 6 is also provided with a first pressing block 61, and the first clamping groove 41 is also provided with a sealing sleeve 412 away from the bottom cover 5, which is arranged between the first pressing block 61 of the battery seat 6 and the base 4. The sealing sleeve 412 is sealingly arranged at the end of the first clamping groove 41 away from the bottom cover 5, forming a sealed defense line, effectively preventing moisture and dust from entering from the first clamping groove 41. The battery seat 6 is provided with a second pressing block 62, and the charging assembly 421 is arranged between the second pressing block 62 and the second clamping groove 42; the first cover body 51 is also provided with a sealing portion 515, which is adapted to sealingly connect the charging assembly 421. The sealing portion 515 on the first cover body 51 tightly cooperates with the charging assembly 421, forming a two-sealing defense line, further enhancing the waterproof performance, ensuring that the charging assembly 421 is not affected by the external environment during use, and also providing additional physical protection for the charging assembly 421, preventing damage to the charging assembly 421 caused by external impact or extrusion.

[0228] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present application, and it should be noted that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A toothbrush head characterized by, The utility model relates to a toothbrush head, comprising: a first body, wherein a brush head assembly is mounted in the first body; a second body, wherein the second body is arranged below the first body, the second body is suitable for detachable mounting on a toothbrush body, a transmission assembly is arranged inside the second body, and the transmission assembly is in transmission connection with the brush head assembly, so that the first body and the second body are arranged in a segmented mode.

2. The toothbrush head according to claim 1, wherein the transmission assembly comprises a transmission shaft and a connecting body, one end of the transmission shaft is in transmission connection with the brush head assembly through a connecting piece, and the other end of the transmission shaft is in transmission connection with a driving shaft of the toothbrush body; the connecting body is arranged inside the second body, and a gap is left between the outer side wall of the connecting body and the inner side wall of the second body; first and second assembly grooves that are not in communication are arranged at two ends of the connecting body, the other end of the transmission shaft is arranged in the first assembly groove, and a driving shaft is arranged in the second assembly groove.

3. The toothbrush head according to claim 2, wherein the connecting body is a hard encapsulation, so that the brush head assembly and the driving shaft of the toothbrush body are directly driven and connected through the transmission assembly.

4. The toothbrush head according to claim 1, wherein the second body has a containing cavity, an axial one end of the containing cavity is provided with a first hole, and one end of the transmission assembly is suitable for penetrating through the first hole; a damping assembly is arranged outside the transmission assembly, the damping assembly comprises a first damping piece, and the first damping piece is arranged between the inner side wall of the second body and the outer side wall of the transmission assembly, so that the outer side wall of the transmission assembly and the inner side wall of the second body are not in direct contact.

5. The toothbrush head according to claim 4, wherein the first damping piece comprises a first damping part, the first damping part is elastically arranged between the inner side wall of the first hole and the outer side wall of the transmission assembly, so that the transmission assembly is arranged in a spaced mode between the part of the second body and the inner side wall of the second body; the transmission assembly is further provided with a damping groove at a position corresponding to the first hole, and the first damping part is arranged in the damping groove; a plurality of damping protrusions are further arranged in a spaced mode on the outer side wall of the first damping part, the damping protrusions are arranged in a spaced mode along the axial direction of the second body and are elastically connected with the inner side wall of the first hole.

6. The toothbrush head according to claim 5, wherein an end of the first hole away from the brush head assembly is further provided with a first abutting wall, one side of the damping groove away from the brush head assembly is further provided with a second abutting wall, and the first damping piece further comprises a second damping part, the second damping part is arranged on one side of the first damping part away from the brush head assembly and is located between the second abutting wall of the damping groove and the first abutting wall of the first hole.

7. The toothbrush head according to claim 6, wherein The third abutting wall is arranged between the third abutting wall and the fourth abutting wall, and the brush head assembly and the second body are not in direct contact. The third damping part is arranged between the third abutting wall and the fourth abutting wall, and the brush head assembly and the second body are not in direct contact.

8. The toothbrush head of claim 7, wherein The second damping part is arranged between the fourth damping part and the fifth damping part, and the fourth damping part is arranged between the outer side wall of the transmission assembly and the inner side wall of the second body. The fifth damping part is arranged between the fourth damping part and the sixth abutting wall, and the transmission assembly and the shaft sleeve are not in direct contact.

9. The toothbrush head of claim 8, wherein The third damping part is arranged between the first damping part and the second damping part, and the damping assembly is arranged outside all parts of the transmission assembly inside the second body, and all parts of the transmission assembly inside the second body are not in direct contact with the second body.

10. The toothbrush head of claim 1, wherein The brush head assembly is rotatably mounted on the second body through the transmission assembly, and the second assembly groove before and after rotation of the transmission assembly is suitable for fixedly connecting the driving shaft of the toothbrush body.

11. The toothbrush head of claim 10, wherein The second body is provided with a second hole at the other end in the axial direction, and the second hole is matched with the second assembly groove of the transmission assembly; the second assembly groove is provided with a first fixed wall, a second fixed wall and a guide wall, the first fixed wall and the second fixed wall are arranged in sequence and spaced apart in the axial direction around the second body and are suitable for abutting and fixing the driving shaft of the toothbrush body; the guide wall is arranged at the end of the second assembly groove away from the brush head assembly, and the driving shaft of the toothbrush body is suitable for driving the transmission assembly to rotate along the guide wall, so that the second assembly groove is matched with the driving shaft.

12. The toothbrush head of claim 11, wherein The brush head assembly comprises a brush head support, a bristle seat and bristles, the brush head support is arranged inside the first body, the brush head support is sleeved on one end of the transmission shaft and is fixedly connected with the transmission shaft through the connecting piece, the brush head support is provided with the bristle seat, and the bristle seat is provided with the bristles.

13. An electric toothbrush, characterized by The electric toothbrush head and the toothbrush body, the toothbrush body comprising a handle, a driving member, a driving shaft and a connecting seat, the second body of the electric toothbrush head being adapted to be sleeved on the connecting seat and tightly fitted with the toothbrush body, the driving shaft penetrating through the connecting seat and being adapted to be drivingly connected with the transmission assembly of the electric toothbrush head, the handle being provided with a first channel at one end, the handle being provided with a mounting seat, the mounting seat being provided with a second channel corresponding to the first channel; the driving member being mounted on the mounting seat, the driving shaft of the driving member being adapted to penetrate through the second channel and the first channel and then being connected with the toothbrush head; The toothbrush body further comprises an elastic assembly; The elastic assembly comprises a first elastic member, the first elastic member being arranged between the driving member and the mounting seat so that the driving member and the mounting seat are not in direct contact.

14. The electric toothbrush according to claim 13, wherein An installation groove is arranged on the inner side wall of the mounting seat, the first elastic member being arranged in the installation groove, the first elastic member being at least partially extended out of the slot of the installation groove and being connected with the outer side wall of the driving member so that the driving member and the mounting seat are arranged in spaced relation.

15. The electric toothbrush according to claim 14, wherein The mounting seat comprises a first seat body, a second seat body and a third seat body, the first seat body being arranged along the axial direction of the handle, the second seat body being connected with the first seat body at the end away from the first channel and being arranged along the radial direction of the handle, the third seat body being arranged along the axial direction of the handle and being connected with the second seat body at the end away from the first seat body; The driving member has a first connecting wall corresponding to the first seat body, a second connecting wall corresponding to the second seat body and a third connecting wall corresponding to the third seat body; The first elastic member comprises a first elastic part, a second elastic part and a third elastic part, the first elastic part being arranged between the first seat body and the first connecting wall, the second elastic part being arranged between the second seat body and the second connecting wall, and the third elastic part being arranged between the third seat body and the third connecting wall.

16. The electric toothbrush according to claim 15, wherein The handle is further provided with a placement bracket at the side of the driving member away from the first channel, the placement bracket comprising a first bracket body and a second bracket body, the first bracket body being arranged outside the end of the driving member, and the second bracket body being arranged outside the side wall of the driving member; The elastic assembly further comprises a second elastic member, the second elastic member comprising a fourth elastic part and a fifth elastic part, the fourth elastic part being arranged between the first bracket body and the end of the driving member, and the fifth elastic part being arranged between the second bracket body and the side wall of the driving member so that the driving member and the placement bracket are not in direct contact. The elastic assembly further comprises a third elastic member arranged on the outer side wall of the driving member and located between the mounting seat and the placing support, so that the outer side wall of the driving member is not in direct contact with the inner side wall of the handle body.

17. The electric toothbrush of claim 12, wherein, The handle body further comprises a water-blocking sealing ring arranged around the driving shaft and located below the connecting seat; gaps are left between the driving shaft and the inner side walls of the second channel and the first channel, and the water-blocking sealing ring is arranged around the outer side wall of the driving shaft and located at one end of the second channel close to the first channel, so that the driving shaft and the second channel are arranged in a sealed manner.

18. The electric toothbrush of claim 17, wherein, The mounting seat comprises a first assembly wall arranged at one end of the second channel close to the first channel, and the water-blocking sealing ring comprises a first waterproof part arranged around the outer side wall of the driving shaft and connected to one end of the first waterproof part close to the first channel in a sealed manner; The mounting seat further comprises a second assembly wall arranged at one side of the first assembly wall close to the first channel along the axial direction of the handle body, and the inner side wall of the second assembly wall is arranged at a distance from the outer side wall of the first waterproof part; The water-blocking sealing ring further comprises a second waterproof part connected to one end of the first waterproof part close to the first channel, and arranged between one end of the first channel close to the second channel and one end of the second assembly wall away from the second channel in a sealed manner.

19. The electric toothbrush of claim 18, wherein, The inner side of the handle body further comprises a mounting ring wall, and the second assembly wall of the mounting seat is adapted to be mounted in abutment with the mounting ring wall; The water-blocking sealing ring further comprises a third waterproof part arranged at one end of the second waterproof part away from the first waterproof part and in a sealed manner between the second assembly wall and the mounting ring wall; The outer side wall of the third waterproof part is provided with a plurality of second waterproof protrusions arranged at a distance along the axial direction of the handle body and in abutment with the inner side wall of the mounting ring wall.

20. The electric toothbrush of claim 19, wherein, The mounting seat further comprises a third assembly wall arranged at one side of the second assembly wall away from the first channel along the radial direction of the handle body; The first waterproof part further comprises a fourth waterproof part arranged at one end of the third waterproof part away from the second waterproof part and in a sealed manner between one end of the mounting ring wall away from the first channel and the third assembly wall, and a fifth waterproof part arranged at one end of the fourth waterproof part away from the third waterproof part and located between the inner side wall of the handle body and the outer side wall of the first seat body.

21. The electric toothbrush of claim 12, wherein, The second body end is provided with a shaft sleeve, and a pair of elastic clamping blocks are arranged on both sides of the shaft sleeve; The outer wall of the connecting seat is provided with a fixed clamping block, the projection of the elastic clamping block at least partially overlaps the fixed clamping block, and during the buckling process of the shaft sleeve and the connecting seat, the pair of elastic clamping blocks at least partially abut against the fixed clamping block, so that the second body is adapted to be inserted and pulled out at any angle in the connecting seat of the toothbrush main body; A pair of elastic clamping blocks are symmetrically arranged on both sides of the shaft sleeve, the included angle between the pair of elastic clamping blocks at the end of the shaft sleeve where the elastic clamping blocks are close to each other is a first included angle, the included angle between the two ends of the connecting seat where the fixed clamping blocks are away from each other is a second included angle, and the first included angle is smaller than the second included angle, so that the circumference of the fixed clamping block is always greater than the maximum circumference of the pair of elastic clamping blocks.

22. The electric toothbrush of claim 12, further comprising a base and a bottom cover, the base being fixedly arranged at the bottom of the handle main body, the first clamping groove and the second clamping groove being arranged through the base, the second clamping groove being adapted to install the charging assembly; The bottom cover comprises a first cover body and a second cover body, the first cover body is arranged on the top of the second cover body, the first cover body is provided with a connecting part, the connecting part is movably connected with the first clamping groove, the second cover body is provided with a buckling groove, the first cover body is provided with an elastic air hole at the position corresponding to the buckling groove, and the elastic air hole can be automatically opened and closed to discharge the air between the base and the bottom cover. ​

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