Electric toothbrush holder assembly and electric toothbrush

Abstract

To provide a holder assembly for an electric toothbrush, which may effectively enhance the vibration damping effect of the entire holder assembly.SOLUTION: Provided is a holder assembly for an electric toothbrush and an electric toothbrush, the holder assembly for an electric toothbrush including a holder body and an elastic cushioning member. The holder body includes a main body portion and a connection structure connected to each other, a battery insertion chamber is formed in the main body portion, and the connection structure includes an insertion mating portion. The elastic cushioning member includes a mounting cylinder, the mounting cylinder includes a motor mounting chamber, and the mounting cylinder has a motor cushioning portion. The motor cushioning portion and the insertion mating portion are insertion-connected and fixed in an axial direction of the mounting cylinder. The motor cushioning portion includes a peripheral cushioning surface and an axial cushioning surface. The insertion mating portion includes a peripheral mating surface and an axial mating surface. The peripheral mating surface abuts against and is mated with the peripheral cushioning surface around the axial direction of the mounting cylinder, and the axial mating surface abuts against and is mated with the axial cushioning surface around the axial direction of the mounting cylinder.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present application relates to the technical field of electric toothbrushes, and more particularly to an electric toothbrush holder assembly and an electric toothbrush. [Background technology]

[0002] As people's living standards improve day by day, the use and popularity of electric toothbrushes are also increasing. The brush handle assembly of an electric toothbrush includes a housing, a motor, a battery, and a mounting holder for fixing the motor and battery in the housing. When in use, the motor shaft extending from the housing is mated with the brush head, and the battery supplies power to the motor, which then vibrates via the motor's drive shaft.

[0003] To improve the assembly efficiency of the internal structure of the brush handle, current products generally connect the motor holder and battery holder together, so that the battery and motor are fixed to the mounting holder together and the whole is assembled into the housing via the mounting holder. However, because the high-frequency vibration of the motor is directly transmitted to the mounting holder, the whole brush handle of the electric toothbrush vibrates strongly.

[0004] In related technology, in order to reduce vibration, a rubber bushing is fitted around the motor, and the motor is mounted in a motor holder via the rubber bushing. In this way, the rubber bushing can only absorb vibrations in the radial direction of the motor, and cannot absorb vibrations in the axial direction of the motor, resulting in a low overall vibration damping effect.

[0005] The above content is only intended to aid in understanding the technical solution of the present invention, and is not intended to acknowledge that the above content is prior art. Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above problems, the present invention provides a holder assembly for an electric toothbrush to solve the technical problems of the strong vibration sensation and low vibration damping effect of the electric toothbrush. [Means for solving the problem]

[0007] In order to achieve the above object, the holder assembly of the electric toothbrush according to the present invention includes a holder body and an elastic buffer part, the holder body includes a main body portion and a connection structure that are connected to each other, a battery mounting chamber is formed in the main body portion, and the connection structure has an insertion fitting portion; The elastic buffer part includes a mounting tube, and a motor mounting chamber is formed in the mounting tube. The mounting tube has a motor buffer part, and the motor buffer part and the insertion fitting part are inserted and fixed in the axial direction of the mounting tube to connect the holder body and the elastic buffer part, wherein: The motor buffer portion has a circumferential buffer surface and an axial buffer surface, and the insertion fitting portion has a circumferential fitting surface and an axial fitting surface, the circumferential fitting surface and the circumferential buffer surface abuttingly fitted around the axial direction of the mounting tube, and the axial fitting surface and the axial buffer surface abuttingly fitted in the axial direction of the mounting tube.

[0008] In one embodiment, the insertion fitting portion includes a plurality of insertion protrusions spaced apart along the circumferential direction of the mounting tube, a first insertion groove is formed between two adjacent insertion protrusions, a bottom wall of the first insertion groove and an end wall of the insertion protrusion form the axial fitting surface, and a side wall of the first insertion groove and a side wall of the insertion protrusion form the circumferential fitting surface; The motor buffer section includes a plurality of second insertion grooves formed on an end wall of the mounting tube facing the connecting structure, the plurality of second insertion grooves are spaced apart along the circumferential direction of the mounting tube, a buffer protrusion is formed between two adjacent second insertion grooves of the mounting tube, a bottom wall of the second insertion groove and an end wall of the buffer protrusion form the axial buffer surface, and a side wall of the second insertion groove and a side wall of the buffer protrusion form the circumferential buffer surface; The plurality of buffer protrusions are inserted and fixed in a one-to-one correspondence and conformance with the plurality of first insertion grooves, and the plurality of insertion protrusions are inserted and fixed in a one-to-one correspondence and conformance with the plurality of second insertion grooves.

[0009] In one embodiment, the mounting tube further has an inner surrounding wall, which surrounds and forms the motor mounting chamber, and the multiple buffer protrusions are located on the outer peripheral wall of the inner surrounding wall, and the inner surrounding wall is fitted into the inner circumference of the insertion fitting portion.

[0010] In one embodiment, the connection structure further includes a connection ring and a stopper flange, the connection ring is connected to the end of the insertion fitting portion that is away from the mounting tube, the stopper flange is connected to the inner wall surface of the connection ring, and the inner surrounding wall is fitted onto the inner wall surface of the connection ring with the buffer protrusion protruding toward the peripheral portion of the main body portion and abutting against the stopper flange.

[0011] In one embodiment, a plurality of stopper convex muscles are provided on the inner wall surface of the inner surrounding wall, extending along the axis of the mounting tube, and the plurality of stopper convex muscles are installed at intervals around the circumferential direction of the inner surrounding wall, and the protruding height of the stopper convex muscles is installed so as to gradually decrease from the mounting tube toward the main body portion.

[0012] In one embodiment, a circumferential stopper portion is provided on the inner peripheral wall of the inner surrounding wall to limit rotation of the motor around its axis.

[0013] In one embodiment, the width of at least some of the buffer protrusions in the circumferential direction of the mounting cylinder is greater than the width of the adjacent insertion protrusions in the circumferential direction of the connecting ring.

[0014] In one embodiment, the connecting structure is connected to one end of the main body portion, and the width of the buffer protrusion in the circumferential direction of the mounting tube is gradually reduced toward the main body portion, and the width of the insertion protrusion in the circumferential direction of the mounting tube is gradually reduced away from the main body portion.

[0015] In one embodiment, the width of the end face of the buffer protrusion facing the main body portion in the circumferential direction of the connecting ring is greater than half the maximum width of the buffer protrusion, and the width of the end face of the insertion protrusion facing away from the main body portion is greater than half the maximum width of the insertion protrusion.

[0016] In one embodiment, the elastic buffer component further includes an elastic guide bar connected to the mounting tube, the elastic guide bar extending along the axial direction of the mounting tube toward the main body, the elastic guide bar being partially recessed and protruding from the outer wall of the main body, and a buffer convex hull being provided on the outer wall surface of the elastic guide bar.

[0017] In one embodiment, at least two of the elastic guide bars are spaced apart in the circumferential direction of the mounting tube, and at least two of the buffer convex hulls are spaced apart along the length of the elastic guide bar, and the buffer convex hulls are arranged around the axis of the mounting tube to surround the outer peripheral wall of the elastic guide bar.

[0018] In one embodiment, the elastic guide bar has a fitting groove formed between two adjacent buffer convex portions, and the outer circumferential wall of the body is provided with a fitting protrusion that fits into the fitting groove.

[0019] In one embodiment, the elastic cushioning part further includes a first surrounding portion and a second surrounding portion that are spaced apart in the axial direction of the mounting tube, and a connecting arm that connects the first surrounding portion and the second surrounding portion; the first surrounding portion and the second surrounding portion all extend along a circumferential direction of the main body portion, and the first surrounding portion, the second surrounding portion, and the connecting arm are all fitted into the main body portion, At least one of the first surrounding portion and the second surrounding portion is connected to a plurality of the elastic guide bars.

[0020] In one embodiment, the holder body and the elastic buffer part are integrally injection molded.

[0021] The present invention further provides an electric toothbrush, the electric toothbrush including a brush handle assembly, the brush handle assembly including a housing, a motor mounted in the housing, a battery, and the electric toothbrush holder assembly described in any one of the above, wherein a lower end of the motor is mounted in a motor mounting chamber of the electric toothbrush holder assembly, and the battery is mounted in a battery mounting compartment of the electric toothbrush holder assembly. [Effects of the Invention]

[0022] The electric toothbrush holder assembly of the present invention includes a holder body and an elastic cushioning component. The holder body includes a main body portion and a connecting structure that are connected to each other. The main body portion has a battery mounting chamber formed therein. The connecting structure has an insertion fitting portion. The elastic cushioning component includes a mounting tube that forms a motor mounting chamber within the mounting tube. The mounting tube has a motor cushioning portion, and the motor cushioning portion and the insertion fitting portion are inserted and fixed in the axial direction of the mounting tube to connect the holder body and the elastic cushioning component. In this way, by inserting and fixing the holder body for mounting the battery and the elastic cushioning component for mounting the motor in the extension direction of the motor shaft, elastic cushioning and vibration damping of the elastic cushioning component relative to the holder body in the radial direction of the mounting tube can be ensured. Furthermore, by integrally connecting the holder body and the elastic cushioning component, the battery and motor can be fixed together to the holder assembly during assembly. The entire assembly can be assembled into the brush handle housing via the holder assembly, improving the installation efficiency of the internal structure of the brush handle.

[0023] The motor buffer section has a circumferential buffer surface and an axial buffer surface, and the insertion fitting section has a circumferential fitting surface and an axial fitting surface. The circumferential fitting surface and the circumferential buffer surface are fitted in abutment with each other around the axis of the mounting tube, so that the motor buffer section can elastically deform around the axis of the mounting tube relative to the insertion fitting section. The axial fitting surface and the axial buffer surface are fitted in abutment with each other in the axial direction of the mounting tube, so that the motor buffer section can elastically deform along the axial direction of the mounting tube relative to the insertion fitting section. In this way, after the elastic buffer part for mounting the motor and the holder main body for mounting the battery are fixedly connected, elastic buffering and vibration damping can be achieved in the axial direction of the motor shaft, around the axial direction of the motor shaft, and in the radial direction of the motor shaft, thereby achieving multidimensional vibration damping of the elastic buffer part relative to the holder main body and effectively improving the vibration damping effect of the entire holder assembly. [Brief explanation of the drawings]

[0024] In order to more clearly explain the technical solutions in the embodiments of the present application, the drawings necessary for describing the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without exerting any creative efforts. [Figure 1] 1 is a structural schematic diagram of an embodiment of a holder assembly of an electric toothbrush according to the present invention; [Figure 2] 2 is a structural schematic diagram of the holder assembly in FIG. 1 from another angle. [Figure 3] FIG. 3 is a transverse cross-sectional view of the holder assembly in FIG. 2. [Figure 4] FIG. 2 is a longitudinal cross-sectional view of the holder assembly in FIG. 1. [Figure 5] 1 is a structural schematic diagram of an embodiment of an elastic cushioning component according to the present invention; [Figure 6] 6 is a schematic structural view of the medium-elasticity buffer part in FIG. 5, seen from another angle. [Figure 7] 1 is a structural schematic diagram of an embodiment of a holder body according to the present invention; [Figure 8]1 is a structural schematic diagram of an embodiment of an electric toothbrush according to the present invention; [Figure 9] 9 is a cross-sectional view of the brush handle assembly of the electric toothbrush in FIG. 8 from one angle. [Figure 10] FIG. 10 is a partial enlarged view of a portion A in FIG.

[0025] The realization of the object, the function features and advantages of the present invention will be further explained with reference to the drawings in conjunction with the embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, the technical solutions in the embodiments of the present application will be clearly and completely explained with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained based on the embodiments of the present application without the need for creative efforts by those skilled in the art are within the scope of protection of the present application. Furthermore, the technical solutions in each embodiment may be combined with each other, but this must be realized by those skilled in the art. If the combination of technical solutions is contradictory or cannot be realized, such combination of technical solutions does not exist and should not be considered to be within the scope of protection claimed by the present invention.

[0027] It should be noted that in the embodiments of the present invention, when there are directional instructions (e.g., up, down, left, right, front, back, etc.), the directional instructions are merely for interpreting the relative positional relationships and movement conditions of each component in a particular posture, and when the particular posture changes, the directional instructions also change accordingly.

[0028] Furthermore, when descriptions such as "first" and "second" appear in the embodiments of the present invention, the descriptions such as "first" and "second" are for explanatory purposes only and should not be understood as expressing or suggesting the relative importance of or implicitly indicating the number of technical features to be shown. Therefore, a feature defined by "first" or "second" may explicitly or implicitly include one or more of the feature. Furthermore, "and / or" in this specification means including three parallel solutions, and for example, "A and / or B" includes solution A, solution B, or a solution in which both A and B are satisfied.

[0029] The present invention provides a holder assembly for an electric toothbrush.

[0030] 1 to 4 , in an embodiment of the present invention, a holder assembly 100 of the electric toothbrush includes a holder body 110 and an elastic cushioning part 130. The holder body 110 includes a main body part 111 and a connecting structure 114 that are connected to each other, the main body part 111 having a battery 400 mounting chamber 112 formed therein, and the connecting structure 114 having an insertion fitting part 115. The elastic cushioning part 130 includes a mounting tube 131 that has a motor mounting chamber 132 formed therein, the mounting tube 131 having a motor cushioning part 133, the motor cushioning part 133 and the insertion fitting part 115 being inserted and fixed in the axial direction of the mounting tube 131 to connect the holder body 110 and the elastic cushioning part 130.

[0031] The motor buffer portion 133 has a circumferential buffer surface 134 and an axial buffer surface 135, and the insertion fitting portion 115 has a circumferential fitting surface 116 and an axial fitting surface 117, with the circumferential fitting surface 116 and the circumferential buffer surface 134 abutting and fitting around the axial direction of the mounting tube 131, and the axial fitting surface 117 and the axial buffer surface 135 abutting and fitting in the axial direction of the mounting tube 131.

[0032] In this embodiment, the holder body 110 may be specifically made of plastic or other hard materials. The elastic buffering component 130 may be entirely made of elastic materials such as silica gel or silicone rubber. The body 111 and the connecting structure 114 of the holder body 110 may be integrally molded or separately molded. Optionally, the body 111 and the connecting structure 114 are integrally molded to enhance structural strength. The connecting structure 114 may be connected to the end of the body 111, or to the center or near the end of the body 111, and may be selected and designed according to actual needs. Optionally, the connecting structure 114 is connected to the end of the body 111 to enhance structural compactness.

[0033] The battery 400 mounting chamber 112 is formed on the main body 111. Generally, the battery 400 is mounted vertically within the brush handle to reduce the diameter of the electric toothbrush handle. In this case, the main body 111 and the battery 400 mounting chamber 112 have an elongated shape extending vertically overall. The main body 111 may have various shapes, for example, a cylindrical shape, a rectangular tube shape, or even a semi-enclosed frame shape. The specific structure and shape of the main body 111 are not specifically limited herein, as long as the battery 400 mounting chamber 112 is formed and the battery 400 can be fixedly mounted therein.

[0034] As can be understood, since the motor mounting chamber 132 is intended to be fitted to the lower end of the motor 300, the cross-sectional shape of the motor mounting chamber 132 may be appropriately adjusted according to the cross-sectional shape of the motor 300 used in the electric toothbrush, and is not specifically limited herein. In this way, the axis of the mounting tube 131 is aligned with the extension direction of the motor shaft 310 of the motor 300. The outer cross-sectional shape of the mounting tube 131 may be circular, elliptical, rectangular, etc. Since the cross-sectional shape of the brush handle casing of an electric toothbrush is generally circular, the outer cross-sectional shape of the mounting tube 131 is preferably circular to better fit the mounting tube 131 within the brush handle casing.

[0035] The connection structure 114 of the holder body 110 has an insert fitting portion 115, which is made of a hard material. The mounting tube 131 of the elastic buffer part 130 has a motor buffer part 133, which is made of an elastic material. The motor buffer part 133 and the insert fitting portion 115 are inserted and fixed in the axial direction of the mounting tube 131. To improve the connection stability and prevent the motor buffer part 133 from separating from the insert fitting portion 115 in the radial direction of the mounting tube 131, the mating surfaces of the motor buffer part 133 and the insert fitting portion 115 may be further bonded to each other or connected to the motor buffer part 133 and the insert fitting portion 115 by a secondary injection process. By fitting the insert fitting portion 115 and the motor buffer part 133 to the mounting tube 131 in the axial direction, rotation of the holder body 110 around the axis of the mounting tube 131 and movement along the axis of the mounting tube 131 can be restricted. As can be seen, when the insertion fitting 115 and the motor buffer 133 are fitted and inserted into the mounting tube 131 in the axial direction, there are two possible situations for the radial assembly of the motor buffer 133 relative to the mounting tube: One is that the motor buffer 133 and the insertion fitting 115 have abutment surfaces that abut and fit together radially; the other is that the motor buffer 133 and the insertion fitting 115 do not have abutment surfaces that abut and fit together radially of the mounting tube 131, i.e., one of the motor buffer 133 and the insertion fitting 115 penetrates radially through the mounting tube 131. Either of these two situations can achieve shock absorption and vibration damping of the motor buffer 133 relative to the insertion fitting 115 in the radial direction of the mounting tube 131.

[0036] The motor buffer part 133 has a circumferential buffer surface 134 and an axial buffer surface 135. The number of the circumferential buffer surface 134 and the axial buffer surface 135 may be one or more, and is not specifically limited herein. The number of the circumferential fitting surfaces 116 corresponds one-to-one with the number of the circumferential buffer surfaces 134, and the number of the axial buffer surfaces 135 corresponds one-to-one with the axial fitting surfaces 117. The axial fitting surfaces 117, the axial buffer surface 135, the circumferential fitting surfaces 116, and the circumferential buffer surface 134 may be either flat or arcuate, or a combination of flat and arcuate surfaces. It is sufficient that the abutting engagement between the circumferential buffer surface 134 and the circumferential fitting surface 116 allows elastic deformation of the mounting tube 131 of the elastic buffer part around the axis, and the abutting engagement between the axial buffer surface 135 and the axial fitting surface 117 allows elastic deformation of the mounting tube 131 of the elastic buffer part along the axis.

[0037] The motor buffer part 133 and the insertion fitting part 115 may have various shapes, for example, one of the motor buffer part 133 and the insertion fitting part 115 may be a protrusion structure and the other a groove opening toward the protrusion structure, or of course, the motor buffer part 133 and the insertion fitting part 115 may have a tooth-like structure that is inserted and fitted into each other. The circumferential buffer surface 134 of the motor buffer part 133 and the circumferential fitting surface 116 of the insertion fitting part 115 abut and fit together around the axial direction of the mounting tube 131, thereby allowing the motor buffer part 133 to elastically deform around the axial direction of the mounting tube 131, thereby ensuring positional restriction between the holder body 110 and the elastic buffering part 130 around the axial direction of the mounting tube 131 and realizing elastic buffering and vibration damping of the elastic buffering part 130 relative to the holder body 110 in the circumferential direction of the mounting tube 131. The axial buffer surface 135 of the motor buffer part 133 and the axial mating surface 117 of the insertion mating part 115 abut and fit together along the axial direction of the mounting tube 131, i.e., the motor buffer part 133 is allowed to elastically deform along the axial direction of the mounting tube 131. In this way, the positional restriction between the holder main body 110 and the elastic buffer part 130 along the axial direction of the mounting tube 131 is ensured, and elastic buffering and vibration control of the elastic buffer part 130 relative to the holder main body 110 along the axial direction of the mounting tube 131 is realized.

[0038] The holder assembly 100 of the electric toothbrush of the present invention includes a holder body 110 and an elastic cushioning part 130, the holder body 110 includes a main body portion 111 and a connecting structure 114 which are connected to each other, a battery 400 mounting chamber 112 is formed in the main body portion 111, the connecting structure 114 has an insertion fitting portion 115, the elastic cushioning part 130 includes a mounting tube 131, a motor mounting chamber 132 is formed in the mounting tube 131, the mounting tube 131 has a motor cushioning part 133, and the motor cushioning part 133 and the insertion fitting portion 115 are inserted and fixed in the axial direction of the mounting tube 131 to connect the holder body 110 and the elastic cushioning part 130. In this way, by inserting and fixing the holder body 110 for mounting the battery 400 and the elastic cushioning part for mounting the motor 300 in the extension direction of the motor shaft 310, it is possible to ensure elastic cushioning and vibration suppression in the radial direction of the mounting tube 131 of the elastic cushioning part relative to the holder body 110. In addition, by integrally connecting the holder body 110 and the elastic cushioning part, the battery 400 and motor 300 can be fixed together to the holder assembly 100 during assembly, and the entire assembly can be assembled into the brush handle housing via the holder assembly 100, improving the installation efficiency of the internal structure of the brush handle.

[0039] The motor buffer portion 133 is provided with a circumferential buffer surface 134 and an axial buffer surface 135, the insertion fitting portion 115 is provided with a circumferential fitting surface 116 and an axial fitting surface 117, and the circumferential fitting surface 116 and the circumferential buffer surface 134 are abutted and fitted around the axial direction of the mounting tube 131, thereby allowing the motor buffer portion 133 to elastically deform around the axial direction of the mounting tube 131 relative to the insertion fitting portion 115, and the axial fitting surface 117 and the axial buffer surface 135 are abutted and fitted in the axial direction of the mounting tube 131, allowing the motor buffer portion 133 to elastically deform along the axial direction of the mounting tube 131 relative to the insertion fitting portion 115. In this way, after the elastic cushioning part 130 for mounting the motor 300 and the holder main body 110 for mounting the battery 400 are fixedly connected, elastic cushioning and vibration damping can be achieved in the axial direction of the motor shaft 310, around the axial direction of the motor shaft 310, and in the radial direction of the motor shaft 310, thereby achieving multidimensional vibration damping of the elastic cushioning part 130 relative to the holder main body 110 and effectively improving the vibration damping effect of the entire holder assembly 100.

[0040] 1 to 7, in one embodiment, the insertion fitting portion 115 includes a plurality of insertion protrusions 118 spaced apart along the circumferential direction of the mounting tube 131, a first insertion groove 119 is formed between two adjacent insertion protrusions 118, a bottom wall of the first insertion groove 119 and an end wall of the insertion protrusion 118 form an axial fitting surface 117, and a side wall of the first insertion groove 119 and a side wall of the insertion protrusion 118 form a circumferential fitting surface 116, The motor buffer part 133 includes a plurality of second insertion grooves 136 formed on the end wall of the mounting tube 131 facing the connecting structure 114, the plurality of second insertion grooves 136 being spaced apart along the circumferential direction of the mounting tube 131, a buffer protrusion 137 being formed between two adjacent second insertion grooves 136 of the mounting tube 131, the bottom wall of the second insertion groove 136 and the end wall of the buffer protrusion 137 forming an axial buffer surface 135, and the side wall of the second insertion groove 136 and the side wall of the buffer protrusion 137 forming a circumferential buffer surface 134; The plurality of buffer protrusions 137 correspond one-to-one to and are fitted into the plurality of first insertion grooves 119, and the plurality of insertion protrusions 118 correspond one-to-one to and are fitted into the plurality of second insertion grooves 136, and are fitted into the plurality of second insertion grooves 136, respectively.

[0041] In this embodiment, as can be understood, the bottom wall of the first insertion groove 119, the bottom wall of the second insertion groove 136, the end wall of the insertion protrusion 118, and the end wall of the buffer protrusion 137 are all wall surfaces in the axial direction of the mounting tube 131. The side walls of the first insertion groove 119, the side walls of the second insertion groove 136, the side walls of the buffer protrusion 137, and the side walls of the insertion protrusion 118 are all wall surfaces along the circumferential direction of the mounting tube 131. The shapes of the insertion protrusion 118 and the buffer protrusion 137 may be various, such as tooth-like, arc-shaped, or sheet-shaped, and are not specifically limited herein. The number of insertion protrusions 118 and the buffer protrusions 137 may be selected and designed according to actual needs and are not specifically limited herein. The shapes and widths of the multiple insertion protrusions 118 may be the same or different. They may be selected and designed according to actual needs and are not specifically limited herein. The plurality of insertion protrusions 118 are spaced apart along the circumferential direction of the mounting tube 131, and the intervals between two adjacent insertion protrusions 118 may be the same or different. Optionally, the intervals between two adjacent insertion protrusions 118 are the same to ensure the circumferential insertion stability between the insertion fitting portion 115 and the motor buffer portion 133. A first insertion groove 119 is formed between the two adjacent insertion protrusions 118.

[0042] The motor buffer part 133 includes a plurality of second mounting grooves 136 spaced apart along the circumferential direction of the mounting tube 131, and the second mounting grooves are opened on the end wall of the mounting tube 131 facing the connecting structure 114, and the second mounting grooves are installed to open toward the connecting structure 114. The second mounting grooves may penetrate both the inner and outer wall surfaces of the mounting tube 131, or may penetrate only the inner or outer wall surface of the mounting tube 131, or may not penetrate the inner or outer wall surfaces of the mounting tube 131; this is not specifically limited here. A buffer protrusion 137 is formed between two adjacent second insertion grooves 136, and when mounted, the multiple insertion protrusions 118 of the insertion fitting part 115 are inserted and fixed in a one-to-one correspondence with and fit into the multiple second insertion grooves 136 of the motor buffer part 133, and the multiple buffer protrusions 137 of the motor buffer part 133 are inserted and fixed in a one-to-one correspondence with and fit into the multiple first insertion grooves 119 of the insertion fitting part 115. In this way, the motor buffer part 133 and the insertion fitting part 115 are inserted and fitted into each other, thereby achieving a stable connection between the holder body 110 and the elastic buffer part 130.

[0043] The bottom wall of the first insertion groove 119 and the end wall of the insertion protrusion 118 form the axial fitting surface 117, so that the insertion fitting portion 115 forms the axial fitting surface 117 with a difference in height in the circumferential direction of the mounting tube 131. The bottom wall of the second insertion groove 136 and the end wall of the buffer protrusion 137 form the axial buffer surface 135, so that the motor buffer portion 133 forms the axial buffer surface 135 with a difference in height in the circumferential direction of the mounting tube 131. The buffer protrusion 137 and the second insertion groove 136 of the motor buffer portion 133 form circumferential buffer surfaces 134 on both circumferential side walls of the mounting tube 131, and the first insertion groove 119 and the insertion protrusion 118 of the insertion fitting portion 115 form circumferential fitting surfaces 116 on both circumferential side walls of the mounting tube 131. In this way, when the multiple buffer protrusions 137 of the motor buffer portion 133 are fitted and inserted into the multiple first insertion grooves 119 of the insertion fitting portion 115, and when the multiple insertion protrusions 118 of the insertion fitting portion 115 are fitted and inserted into the multiple second insertion grooves 136 of the motor buffer portion 133, the multiple axial buffer surfaces 135 and the axial fitting surfaces 117 are fitted into each other in the circumferential direction of the mounting tube 131, and the multiple circumferential buffer surfaces 134 and the circumferential fitting surfaces 116 are fitted into each other. Compared with other structures, the engagement force between the motor buffer part 133 and the insertion fitting part 115 is effectively increased, making the connection between the motor buffer part 133 and the insertion fitting part 115 more stable, and effectively expanding the axial buffering area and circumferential buffering area between the motor buffer part 133 and the insertion fitting part 115, greatly improving the buffering and vibration-damping effect of the elastic buffer part 130 on the holder body 110, and maximizing the elimination of vibration and noise in the holder assembly 100 caused by the vibration of the motor 300.

[0044] Furthermore, as shown in Figures 1 to 6, the mounting tube 131 further has an inner surrounding wall 138, which surrounds and forms the motor mounting chamber 132, and multiple buffer protrusions 137 are located on the outer peripheral wall of the inner surrounding wall 138, and the inner surrounding wall 138 is fitted into the inner circumference of the insertion fitting portion 115.

[0045] In this embodiment, the mounting tube 131 further includes an inner surrounding wall 138, which surrounds and forms the motor mounting chamber 132. In this way, the inner surrounding wall 138 is better bonded to the outer peripheral wall of the motor 300, providing surrounding and radial vibration damping for the entire motor 300, ensuring the stability of the assembly of the motor 300 and the mounting tube 131 and further improving the vibration damping effect of the entire elastic buffer component 130. In addition, by installing the inner surrounding wall 138 and positioning the multiple buffer protrusions 137 on the outer peripheral wall of the inner surrounding wall 138 and fitting the inner surrounding wall 138 to the inner circumference of the insertion fitting portion 115, the outer wall surface of the inner surrounding wall 138 forms the inner wall surfaces of the multiple second insertion grooves 136. In this way, when the multiple insertion protrusions 118 and the multiple second insertion grooves 136 are fitted and inserted, the inner wall surface of the insertion protrusions 118 can abut against the outer wall surface of the inner surrounding wall 138. In this way, the inner surrounding wall 138 can radially limit and buffer the position of the insertion protrusions 118, further improving the radial connection and elastic buffering effect between the motor buffer part 133 and the insertion fitting part 115.

[0046] 1 and 7, the connection structure 114 further includes a connection ring 120 and a stopper flange 121, the connection ring 120 is connected to the end of the insertion fitting portion 115 that is away from the mounting tube 131, the stopper flange 121 is connected to the inner wall surface of the connection ring 120, and the inner surrounding wall 138 is fitted onto the inner wall surface of the connection ring 120 with the buffer protrusions 137 protruding toward the peripheral portion of the main body portion 111 and abutting against the stopper flange 121.

[0047] In this embodiment, the connecting ring 120 is used to connect the multiple insertion protrusions 118, and the end wall of the connecting ring 120 adjacent to the insertion protrusions 118 forms the bottom wall of the first insertion groove 119. To ensure structural strength, the connecting ring 120 and the multiple insertion protrusions 118 are optionally molded together. The height of the connecting ring 120 may be selected and designed based on the connection strength required for the insertion fitting 115. The shape of the stopper flange 121 may be various, such as annular, wavy, arc-shaped, etc., and is not specifically limited herein. The stopper flange 121 and the connecting ring 120 may be molded together or separately, and is not specifically limited herein. By arranging the inner surrounding wall 138 of the elastic buffer component 130 so that the buffer protrusions 137 protrude toward the periphery of the main body 111, the portion of the buffer protrusions 137 protruding from the inner surrounding wall 138 can be fitted into the connecting ring 120 and conform to the connecting ring 120, thereby increasing the radial positional restriction and elastic buffering area between the elastic buffer component 130 and the holder body 110 of the mounting tube 131, and further improving the connection stability and elastic buffering and vibration-damping effects between the elastic buffer component 130 and the holder body 110. The inner surrounding wall 138 of the elastic buffer component 130 abuts against the stopper flange 121 of the connecting structure 114, thereby restricting the positional restriction on the axial fit between the elastic buffer component 130 and the connecting structure 114, while the stopper flange 121 provides sufficient support area and force for the motor 300 and the elastic buffer component 130, ensuring efficient assembly of the entire device.

[0048] In one embodiment, as shown in Figures 1 to 6, a plurality of stopper convex ridges 139 extending along the axis of the mounting tube 131 are provided on the inner wall surface of the inner surrounding wall 138, and the plurality of stopper convex ridges 139 are installed at intervals around the circumferential direction of the inner surrounding wall 138, and the protruding height of the stopper convex ridges 139 is installed so as to gradually decrease from the mounting tube 131 toward the main body portion 111.

[0049] In this embodiment, the stopper ribs and the inner wall 138 are optionally integrally formed. The number of stopper ribs 139 may be selected and designed according to actual needs. The distance between adjacent stopper ribs may be the same or different. Because the motor 300 is mounted within the mounting tube 131 along the axial direction of the mounting tube 131, the stopper ribs 139 extend along the axial direction of the mounting tube 131, which facilitates assembly of the motor 300 within the mounting tube 131. The stopper ribs 139 are configured so that their protruding height gradually decreases from the mounting tube 131 toward the main body 111. This facilitates installation of the motor 300 within the mounting tube 131, effectively increases the friction between the motor 300 and the inner wall of the mounting tube 131, further stabilizing assembly between the motor 300 and the mounting tube 131 and effectively preventing the motor 300 from rotating about its axis within the mounting tube 131. At the same time, since the outer wall of the motor 300 comes into contact with the multiple stopper convex grooves 139, there is a certain gap between the outer wall of the motor 300 and the inner wall surface of the inner surrounding wall 138. In this way, the vibration transmitted from the motor 300 to the mounting tube 131 can be further reduced, thereby improving the cushioning and vibration-damping effects of the entire elastic cushioning part 130.

[0050] 1 to 6 , in one embodiment, a circumferential stopper portion 140 for restricting rotation of the motor 300 around its axis is provided on the inner peripheral wall of the inner surrounding wall 138. The circumferential stopper portion 140 may be a stopper protrusion or a positioning groove. Only one circumferential stopper portion 140 may be provided, or multiple circumferential stopper portions 140 may be provided at intervals around the circumferential direction of the inner surrounding wall 138. In this case, the multiple circumferential stopper portions 140 may all be stopper protrusions or positioning grooves, or some may be stopper protrusions and some may be positioning grooves. This is not specifically limited. The circumferential stopper portion 140 is provided on the inner peripheral wall of the inner surrounding wall 138, and in this case, a circumferential fitting portion is provided in the mounting seat of the motor 300 corresponding to the circumferential stopper portion 140. By installing a circumferential stopper portion 140 on the inner peripheral wall of the inner surrounding wall 138, after the motor 300 is mounted in the mounting tube 131, the circumferential stopper portion 140 engages with the circumferential fitting portion of the motor 300 mounting seat, thereby restricting the rotation of the motor 300 around its axis.

[0051] In one embodiment, as shown in FIGS. 1 to 3, the width of at least some of the buffer protrusions 137 in the circumferential direction of the mounting tube 131 is greater than the width of the adjacent insertion protrusions 118 in the circumferential direction of the mounting tube 131.

[0052] As can be seen, in this embodiment, the buffer protrusions 137 are elastically deformable and mainly perform an elastic buffering function, while the insertion protrusions 118 are made of a hard material and mainly perform a supporting function. The width of at least some of the buffer protrusions 137 in the circumferential direction of the mounting tube 131 is made larger than the width of the adjacent insertion protrusions 118, thereby improving the structural strength of the buffer protrusions 137 so that they will not be too deformed to recover when subjected to a large impact force, thereby extending the service life of the entire holder assembly 100 and ensuring product quality.

[0053] In one embodiment, referring to Figures 1 to 7, the connecting structure 114 is connected to one end of the main body 111, and the width of the buffer protrusion 137 in the circumferential direction of the mounting tube 131 is gradually reduced toward the main body 111, and the width of the insertion protrusion 118 in the circumferential direction of the mounting tube 131 is gradually reduced away from the main body 111.

[0054] In this embodiment, the width of the buffer protrusions 137 on the mounting tube 131 gradually decreases toward the main body 111, and the width of the insertion protrusions 118 gradually decreases away from the main body 111, i.e., both the buffer protrusions 137 and the insertion protrusions 118 have a tapered structure that is wide at the base and narrow at the top. This provides a guide for the two to be inserted, making it easier to insert and fit the multiple buffer protrusions 137 into the first insertion grooves 119 and the multiple insertion protrusions 118 into the second insertion grooves 136, while also ensuring the connection strength of the buffer protrusions 137 on the mounting tube 131 and the connection strength of the insertion protrusions 118 on the connecting ring 120, thereby preventing breakage of the buffer protrusions 137 and the insertion protrusions 118 due to large vibrations or long-term use.

[0055] Furthermore, in the circumferential direction of the mounting tube 131, the width of the end face of the buffer protrusion 137 facing the main body portion 111 is greater than half the maximum width of the buffer protrusion 137, and the width of the end face of the insertion protrusion 118 facing away from the main body portion 111 is greater than half the maximum width of the insertion protrusion 118.

[0056] As can be seen, in this embodiment, the end face of the buffer protrusion 137 facing the main body 111 is the axial buffer surface 135, and the end face of the insertion protrusion 118 facing away from the main body 111 is the axial fitting surface 117. If the width of the end face of the buffer protrusion 137 facing the main body 111 is made smaller than half of the maximum width of the buffer protrusion 137 and the width of the end face of the insertion protrusion 118 facing away from the main body 111 is made smaller than half of the maximum width of the insertion protrusion 118, the widths of the axial buffer surface 135 and the axial fitting surface 117 will be too small, and the contact area between them will be too small. As a result, the ends of the insertion protrusion 118 and the buffer protrusion 137 will be easily deformed, and the holder body 110 and the elastic buffer part 130 will be subjected to excessive impact force in the axial direction of the mounting tube 131, which is unfavorable. By making the width of the end face of the buffer protrusion 137 facing the main body 111 larger than half the maximum width of the buffer protrusion 137, and by making the width of the end face of the insertion protrusion 118 facing away from the main body 111 larger than half the maximum width of the insertion protrusion 118, the fitting area between the buffer protrusion 137 and the insertion protrusion 118 in the axial direction of the mounting tube 131 is sufficiently large, the ends of the buffer protrusion 137 and the insertion protrusion 118 are less likely to deform, and the holder body 110 and the elastic buffer part 130 can withstand greater impact force in the axial direction of the mounting tube 131, thereby improving the buffering and vibration-damping effect of the entire holder assembly 100 in the axial direction of the mounting tube 131.

[0057] In one embodiment, as shown in Figures 1 to 3, 5 to 7, 9 and 10, the elastic cushioning part 130 further includes an elastic guide bar 150 connected to the mounting tube 131, and the elastic guide bar 150 is installed extending toward the main body 111 along the axial direction of the mounting tube 131, the elastic guide bar 150 is installed partially inserted and protruding from the outer peripheral wall of the main body 111, and a cushioning convex hull 151 is provided on the outer wall surface of the elastic guide bar 150.

[0058] In this embodiment, to ensure connection strength, the elastic guide bar 150 and the mounting tube 131 are optionally molded as a single unit, and the buffer convex hull 151 and the elastic guide bar 150 are optionally molded as a single unit. The number of elastic guide bars 150 may be one or more. When there are multiple elastic guide bars 150, the multiple elastic guide bars 150 may be spaced apart along the circumferential direction of the mounting tube 131. The number of buffer convex hulls 151 may be one or multiple spaced apart along the length of the elastic guide bar 150. By partially recessing the elastic guide bar 150 and protruding it from the outer circumferential wall of the main body 111, suspension of the elastic guide bar 150 can be avoided and the connection stability between the elastic guide bar 150 and the main body 111 can be ensured. The elastic guide bar 150 protrudes from the outer peripheral wall of the main body 111, and a buffer convex hull 151 is installed on the outer wall surface of the elastic guide bar 150. When the holder assembly 100 is installed in the housing of the brush handle, the entire holder assembly 100 comes into contact with the casing of the brush handle via the buffer convex hull 151, thereby providing effective buffering for the holder main body 110 and the brush handle casing, and further reducing vibrations transmitted from the entire holder assembly 100 to the brush handle.

[0059] Furthermore, at least two elastic guide bars 150 are installed at intervals in the circumferential direction of the mounting tube 131, and at least two buffer convex hulls 151 are installed at intervals in the direction of extension of the elastic guide bar 150's length, and the buffer convex hulls 151 are installed around the axis of the mounting tube 131 to surround the outer peripheral wall of the elastic guide bar 150.

[0060] In this embodiment, at least two elastic guide bars 150 are installed at intervals around the mounting tube 131, so that both circumferential sides of the mounting tube 131 and the holder body 110 can elastically abut against the brush handle housing via the buffer convex hulls 151, thereby ensuring uniform buffer stress between the entire holder assembly 100 and the brush handle housing and improving the overall buffering and vibration-damping effect. Installing at least two buffer convex hulls 151 at intervals along the length of the elastic guide bar 150 further improves the elastic buffering area and buffering effect between the holder assembly 100 and the brush handle housing. The buffer convex hulls 151 are installed around the axis of the mounting tube 131, surrounding the outer circumferential wall of the elastic guide bar 150; that is, the outer wall surfaces of the buffer convex hulls 151 protrude beyond the corresponding circumferential side walls of the elastic guide bar 150. In this way, when the elastic guide bar 150 is fitted into the guide groove of the brush handle housing, the circumferential sides of the elastic guide bar 150 are abutted against the inner wall surfaces of the guide groove via the buffer convex hulls 151, thereby realizing buffering and vibration damping in the radial and circumferential directions of the holder body 110 and improving the overall vibration damping effect.

[0061] 1 to 3, 5 to 7, 9 and 10, in one embodiment, the elastic guide bar 150 has a fitting groove 152 formed between two adjacent buffer convex portions 151, and the outer circumferential wall of the main body 111 is provided with a fitting protrusion 113 that fits into the fitting groove 152. In this way, the buffering and vibration-damping effects are ensured, and the connection between the elastic guide bar 150 and the main body 111 is made more stable and reliable. Optionally, the elastic guide bar 150 and the main body 111 are installed by integral injection molding.

[0062] Based on the above embodiment in which at least two elastic guide bars 150 are installed at intervals in the circumferential direction of the mounting tube 131, as shown in Figures 1, 4, 5 and 6, the elastic buffer component 130 further includes a first surrounding portion 161 and a second surrounding portion 162 that are arranged at intervals in the axial direction of the mounting tube 131, and a connecting arm 163 that connects the first surrounding portion 161 and the second surrounding portion 162, The first surrounding portion 161 and the second surrounding portion 162 all extend along the circumferential direction of the main body portion 111, and the first surrounding portion 161, the second surrounding portion 162, and the connecting arm 163 are all fitted into the main body portion 111, At least one of the first surrounding portion 161 and the second surrounding portion 162 is connected to a plurality of elastic guide bars 150 .

[0063] In this embodiment, to ensure structural strength, the first surrounding portion 161, the second surrounding portion 162, the connecting arm 163, and the mounting tube 131 are optionally formed as a single unit. To facilitate the installation and removal of the battery 400, the first surrounding portion 161 and the second surrounding portion 162 are specifically configured as a semi-circular ring structure. The connecting arm 163 extends along the axis of the mounting tube 131 and connects the central portions of the first surrounding portion 161 and the second surrounding portion 162. At least one of the first surrounding portion 161 and the second surrounding portion 162 is connected to the multiple elastic guide bars 150, which can provide a certain support for the multiple elastic guide bars 150 while making the overall structure of the elastic buffering component 130 more compact and stable. The first surrounding portion 161, the second surrounding portion 162 and the connecting arm 163 are all fitted into the main body portion 111, thus effectively increasing the connection area between the elastic cushioning part 130 and the main body portion 111, realizing a multi-angle connection between the elastic cushioning part 130 and the main body portion 111, and further ensuring the connection effect between the two. Meanwhile, the elastic cushioning part 130 is elastically and cushioningly fitted into the connecting structure 114 of the holder body 110 via the mounting tube 131, and the elastic cushioning part 130 is elastically and cushioningly fitted into the main body portion 111 of the holder body 110 via the first surrounding portion 161, the second surrounding portion 162 and the connecting arm 163, which further increases the elastic cushioning connection area between the entire elastic cushioning part 130 and the holder body 110, and further improving the cushioning and vibration damping effect of the entire electric toothbrush holder assembly 100.

[0064] Furthermore, the holder body 110 and the elastic buffer component 130 are integrally injection molded. Specifically, a secondary injection process is used to inject and connect the elastic buffer component 130 onto the hard holder body 110. By integrally injection molding the holder body 110 and the elastic buffer component 130, the connection precision between the holder body 110 and the elastic buffer component 130 can be ensured, and the overall connection strength can be improved, resulting in more effective overall buffering and vibration damping effects. The present invention also provides an electric toothbrush. Referring to FIGS. 8 to 10 , the electric toothbrush includes a brush handle assembly 10, which includes a housing, a motor 300 mounted in the housing, a battery 400, and an electric toothbrush holder assembly 100. For the specific structure of the electric toothbrush holder assembly 100, please refer to the above-mentioned embodiments. The lower end of the motor 300 is mounted in the motor mounting chamber 132 of the electric toothbrush holder assembly 100, and the battery 400 is mounted in the battery 400 mounting chamber 112 of the electric toothbrush holder assembly 100. Since this electric toothbrush incorporates all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects provided by the technical solutions of the above-mentioned embodiments, and therefore further description is omitted here. The specific structures of the motor 300 and the battery 400 may refer to existing designs and are not specifically limited here. Specifically, the brush handle assembly 10 further includes a control assembly, and the motor 300 and the battery 400 are electrically connected via the control assembly. The electric toothbrush further includes a brush head assembly 20, which is detachably connected to the motor shaft 310 of the brush handle assembly 10. The specific structure of the brush head assembly 20 and the manner of detachably connecting the brush head assembly 20 to the motor shaft 310 may refer to existing designs, and will not be described here.

[0065] Finally, it should be noted that the above examples are only used to explain the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above examples, those skilled in the art can still understand that the technical solutions described in the above examples may be modified or some of the technical features may be replaced with equivalents, and such modifications or replacements will not deviate from the essence of the corresponding technical solutions and the spirit and scope of the technical solutions of the examples of the present application. [Explanation of symbols]

[0066] 10 Brush Handle Assembly 20 Brush Head Assembly 100 Holder Assembly 110 Holder body 111 Main body 112 Battery compartment 113 Insertion protrusion 114 Connection structure 115 Insertion fitting part 116 Circumferential mating surface 117 Axial mating surface 118 Insertion protrusion 119 First insertion groove 120 Connecting Ring 121 Stopper flange 130 Elastic cushioning parts 131 Mounting tube 132 Motor mounting chamber 133 Motor buffer 134 Circumferential buffer surface 135 Axial buffer surface 136 Second insertion groove 137 Buffer protrusion 138 Inner Enclosure Wall 139 Stopper convex muscle 140 Circumferential stopper 150 Elastic Guide Bar 151 Buffer convex hull 152 Installation groove 161 First Enclosure 162 Second Enclosure 163 Connecting Arm 200 cabinets 300 motor 310 Motor shaft 400 batteries

Claims

1. 1. A holder assembly for an electric toothbrush, comprising: a holder body including a main body portion and a connection structure that are connected to each other, wherein a battery mounting chamber is formed in the main body portion, and the connection structure has an insertion fitting portion; An elastic buffer component including a mounting tube, wherein a motor mounting chamber is formed within the mounting tube, and the mounting tube includes an elastic buffer component having a motor buffer portion, and the motor buffer portion and the insertion fitting portion are inserted and fixed in the axial direction of the mounting tube to connect the holder body and the elastic buffer component, wherein: the motor buffer portion has a circumferential buffer surface and an axial buffer surface, the insertion fitting portion has a circumferential fitting surface and an axial fitting surface, the circumferential fitting surface and the circumferential buffer surface are abutted and fitted around the axial direction of the mounting tube, and the axial fitting surface and the axial buffer surface are abutted and fitted in the axial direction of the mounting tube, The insertion fitting portion includes a plurality of insertion protrusions spaced apart along the circumferential direction of the mounting tube, a first insertion groove is formed between two adjacent insertion protrusions, a bottom wall of the first insertion groove and an end wall of the insertion protrusion form the axial fitting surface, and a side wall of the first insertion groove and a side wall of the insertion protrusion form the circumferential fitting surface, The motor buffer section includes a plurality of second insertion grooves formed on an end wall of the mounting tube facing the connecting structure, the plurality of second insertion grooves being spaced apart along the circumferential direction of the mounting tube, a buffer protrusion being formed between two adjacent second insertion grooves of the mounting tube, a bottom wall of the second insertion groove and an end wall of the buffer protrusion forming the axial buffer surface, and a side wall of the second insertion groove and a side wall of the buffer protrusion forming the circumferential buffer surface; The plurality of buffer protrusions are inserted and fixed to the plurality of first insertion grooves in a one-to-one correspondence and fit thereto, and the plurality of insertion protrusions are inserted and fixed to the plurality of second insertion grooves in a one-to-one correspondence and fit thereto, The mounting tube further has an inner surrounding wall, which surrounds the motor mounting chamber, the plurality of buffer protrusions are located on an outer circumferential wall of the inner surrounding wall, and the inner surrounding wall is fitted into the inner periphery of the insertion fitting portion; The electric toothbrush holder assembly is characterized in that the connection structure further includes a connection ring and a stopper flange, the connection ring is connected to the end of the insertion fitting portion that is away from the mounting tube, the stopper flange is connected to the inner wall surface of the connection ring, and the inner surrounding wall is fitted into the inner wall surface of the connection ring with the buffer protrusion protruding toward the peripheral portion of the main body portion and abuts against the stopper flange.

2. 1. A holder assembly for an electric toothbrush, comprising: a holder body including a main body portion and a connection structure that are connected to each other, wherein a battery mounting chamber is formed in the main body portion, and the connection structure has an insertion fitting portion; An elastic buffer component including a mounting tube, wherein a motor mounting chamber is formed within the mounting tube, and the mounting tube includes an elastic buffer component having a motor buffer portion, and the motor buffer portion and the insertion fitting portion are inserted and fixed in the axial direction of the mounting tube to connect the holder body and the elastic buffer component, wherein: the motor buffer portion has a circumferential buffer surface and an axial buffer surface, the insertion fitting portion has a circumferential fitting surface and an axial fitting surface, the circumferential fitting surface and the circumferential buffer surface are abutted and fitted around the axial direction of the mounting tube, and the axial fitting surface and the axial buffer surface are abutted and fitted in the axial direction of the mounting tube, The insertion fitting portion includes a plurality of insertion protrusions spaced apart along the circumferential direction of the mounting tube, a first insertion groove is formed between two adjacent insertion protrusions, a bottom wall of the first insertion groove and an end wall of the insertion protrusion form the axial fitting surface, and a side wall of the first insertion groove and a side wall of the insertion protrusion form the circumferential fitting surface, The motor buffer section includes a plurality of second insertion grooves formed on an end wall of the mounting tube facing the connecting structure, the plurality of second insertion grooves being spaced apart along the circumferential direction of the mounting tube, a buffer protrusion being formed between two adjacent second insertion grooves of the mounting tube, a bottom wall of the second insertion groove and an end wall of the buffer protrusion forming the axial buffer surface, and a side wall of the second insertion groove and a side wall of the buffer protrusion forming the circumferential buffer surface; The plurality of buffer protrusions are inserted and fixed to the plurality of first insertion grooves in a one-to-one correspondence and fit thereto, and the plurality of insertion protrusions are inserted and fixed to the plurality of second insertion grooves in a one-to-one correspondence and fit thereto, The mounting tube further has an inner surrounding wall, which surrounds the motor mounting chamber, the plurality of buffer protrusions are located on an outer circumferential wall of the inner surrounding wall, and the inner surrounding wall is fitted into the inner periphery of the insertion fitting portion; a plurality of stopper convex ridges extending along the axis of the mounting cylinder are provided on an inner wall surface of the inner surrounding wall, and the plurality of stopper convex ridges are arranged at intervals around the circumferential direction of the inner surrounding wall; The holder assembly for the electric toothbrush, wherein the protruding height of the stopper convex rib is gradually reduced from the mounting tube toward the main body.

3. 3. The electric toothbrush holder assembly according to claim 1, wherein the width of at least some of the buffer protrusions in the circumferential direction of the mounting tube is greater than the width of the adjacent insertion protrusions in the circumferential direction of the mounting tube.

4. 3. The electric toothbrush holder assembly according to claim 1, wherein the connecting structure is connected to one end of the main body portion, and the width of the buffer protrusion in the circumferential direction of the mounting tube is gradually reduced toward the main body portion, and the width of the insertion protrusion in the circumferential direction of the mounting tube is gradually reduced away from the main body portion.

5. The holder assembly for an electric toothbrush as described in claim 4, characterized in that the width of the end face of the buffer protrusion facing the main body portion in the circumferential direction of the mounting tube is greater than half the maximum width of the buffer protrusion, and the width of the end face of the insertion protrusion facing away from the main body portion is greater than half the maximum width of the insertion protrusion.

6. 3. The electric toothbrush holder assembly according to claim 1, wherein the elastic buffer part further includes an elastic guide bar connected to the mounting tube, the elastic guide bar being installed to extend toward the main body along the axial direction of the mounting tube, the elastic guide bar being partially fitted and protruding from the outer peripheral wall of the main body, and a buffering convex hull being provided on the outer wall surface of the elastic guide bar.

7. 7. The electric toothbrush holder assembly according to claim 6, wherein at least two of the elastic guide bars are spaced apart in the circumferential direction of the mounting tube, and at least two of the buffer convex hulls are spaced apart in the longitudinal direction of the elastic guide bar, and the buffer convex hulls are arranged around the axis of the mounting tube to surround the outer peripheral wall of the elastic guide bar.

8. 8. The electric toothbrush holder assembly according to claim 7, wherein the elastic guide bar has a fitting groove formed between two adjacent buffer convex casings, and the main body has an outer peripheral wall provided with a fitting protrusion that fits into the fitting groove.

9. the elastic cushioning component further includes a first surrounding portion and a second surrounding portion that are spaced apart in the axial direction of the mounting tube, and a connecting arm that connects the first surrounding portion and the second surrounding portion, the first surrounding portion and the second surrounding portion all extend along a circumferential direction of the main body portion, and the first surrounding portion, the second surrounding portion, and the connecting arm all are fitted into the main body portion, 8. The holder assembly for an electric toothbrush according to claim 7, wherein at least one of the first surrounding portion and the second surrounding portion is connected to a plurality of the elastic guide bars.

10. 1. A holder assembly for an electric toothbrush, comprising: a holder body including a main body portion and a connection structure that are connected to each other, wherein a battery mounting chamber is formed in the main body portion, and the connection structure has an insertion fitting portion; An elastic buffer component including a mounting tube, wherein a motor mounting chamber is formed within the mounting tube, and the mounting tube includes an elastic buffer component having a motor buffer portion, and the motor buffer portion and the insertion fitting portion are inserted and fixed in the axial direction of the mounting tube to connect the holder body and the elastic buffer component, wherein: the motor buffer portion has a circumferential buffer surface and an axial buffer surface, the insertion fitting portion has a circumferential fitting surface and an axial fitting surface, the circumferential fitting surface and the circumferential buffer surface are abutted and fitted around the axial direction of the mounting tube, and the axial fitting surface and the axial buffer surface are abutted and fitted in the axial direction of the mounting tube, The elastic buffer component further includes an elastic guide bar connected to the mounting tube, the elastic guide bar being installed to extend toward the main body along the axial direction of the mounting tube, the elastic guide bar being partially fitted and protruding from the outer peripheral wall of the main body, and a buffer convex hull being provided on the outer wall surface of the elastic guide bar; At least two of the elastic guide bars are installed at intervals in the circumferential direction of the mounting tube, and at least two of the buffer convex hulls are installed at intervals in the direction of extension of the length of the elastic guide bar, and the buffer convex hulls are installed around the axis of the mounting tube to surround the outer peripheral wall of the elastic guide bar, The holder assembly for the electric toothbrush, characterized in that the elastic guide bar has an insertion groove formed between two adjacent buffer convex casings, and an insertion protrusion that fits into the insertion groove is provided on the outer peripheral wall of the main body.

11. The insertion fitting portion includes a plurality of insertion protrusions spaced apart along the circumferential direction of the mounting tube, a first insertion groove is formed between two adjacent insertion protrusions, a bottom wall of the first insertion groove and an end wall of the insertion protrusion form the axial fitting surface, and a side wall of the first insertion groove and a side wall of the insertion protrusion form the circumferential fitting surface, The motor buffer section includes a plurality of second insertion grooves formed on an end wall of the mounting tube facing the connecting structure, the plurality of second insertion grooves being spaced apart along the circumferential direction of the mounting tube, a buffer protrusion being formed between two adjacent second insertion grooves of the mounting tube, a bottom wall of the second insertion groove and an end wall of the buffer protrusion forming the axial buffer surface, and a side wall of the second insertion groove and a side wall of the buffer protrusion forming the circumferential buffer surface; The holder assembly for an electric toothbrush as described in claim 10, characterized in that the plurality of buffer protrusions are inserted and fixed in a one-to-one correspondence and fit with the plurality of first insertion grooves, and the plurality of insertion protrusions are inserted and fixed in a one-to-one correspondence and fit with the plurality of second insertion grooves.

12. 12. The electric toothbrush holder assembly according to claim 11, wherein the mounting tube further has an inner surrounding wall, the inner surrounding wall surrounds the motor mounting chamber, the plurality of buffer protrusions are located on the outer peripheral wall of the inner surrounding wall, and the inner surrounding wall is fitted into the inner circumference of the insertion fitting portion.

13. 13. The holder assembly for an electric toothbrush according to claim 12, wherein an inner peripheral wall of the inner surrounding wall is provided with a circumferential stopper portion for restricting rotation of the motor around its axis.

14. 3. The electric toothbrush holder assembly according to claim 1, wherein the holder body and the elastic buffer part are integrally formed by injection molding.

15. An electric toothbrush comprising a brush handle assembly, the brush handle assembly comprising a housing, a motor mounted in the housing, a battery, and an electric toothbrush holder assembly according to any one of claims 1, 2, 10, 11, 12, and 13, wherein a lower end of the motor is mounted in a motor mounting chamber of the electric toothbrush holder assembly, and the battery is mounted in a battery mounting compartment of the electric toothbrush holder assembly.

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