Support assembly for an electric toothbrush and an electric toothbrush

Abstract

The application discloses a support assembly of an electric toothbrush and the electric toothbrush, wherein the support assembly of the electric toothbrush comprises a support body and an elastic buffering component; the support body comprises a main body part and a connecting structure which are connected to each other, a battery mounting bin is formed in the main body part, and the connecting structure is provided with a plug-in matching part; the elastic buffering component comprises a mounting cylinder, a motor mounting cavity is formed in the mounting cylinder, and the mounting cylinder is provided with a motor buffering part; the motor buffering part is plug-in fixed with the plug-in matching part in the axial direction of the mounting cylinder, so as to connect the support body and the elastic buffering component; the motor buffering part is provided with a circumferential buffering surface and an axial buffering surface; the plug-in matching part is provided with a circumferential matching surface and an axial matching surface, the circumferential matching surface is in abutting matching with the circumferential buffering surface in the axial direction of the mounting cylinder, and the axial matching surface is in abutting matching with the axial buffering surface in the axial direction of the mounting cylinder. The support assembly of the electric toothbrush can realize multidimensional shock absorption, and effectively improves the shock absorption effect of the whole support assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric toothbrushes, and particularly relates to a support assembly of an electric toothbrush and the electric toothbrush. BACKGROUND

[0002] With the increasing improvement of people's living standards, the use rate and popularity rate of electric toothbrushes are also increasing. The brush handle assembly of the electric toothbrush includes a shell, a motor, a battery, a mounting support for fixing the motor and the battery in the shell, and the like. In use, the motor shaft extending out of the shell is connected with a brush head, the battery supplies power to the motor, and the brush head is driven to vibrate through the driving shaft of the motor.

[0003] In order to improve the assembly efficiency of the internal structure of the brush handle, the motor support and the battery support are currently connected as a whole, so as to fix the battery and the motor together on the mounting support, and the mounting support can be assembled as a whole into the shell. However, since the high-frequency vibration of the motor is directly transmitted to the mounting support, the overall vibration of the brush handle of the electric toothbrush is strong.

[0004] In the related art, in order to reduce the vibration, a rubber sleeve is sleeved on the periphery of the motor, and the motor is installed in the motor support through the rubber sleeve. In this way, the rubber sleeve can only absorb the vibration of the motor in the radial direction of the rubber sleeve, and cannot absorb the vibration of the motor in the axial direction, so that the overall damping effect is poor.

[0005] The above content is only used to assist in understanding the technical solutions of the application and does not mean that the above content is prior art. SUMMARY

[0006] In view of the above problems, the present application provides a support assembly of an electric toothbrush, which aims to solve the technical problems of strong vibration and poor damping effect of the electric toothbrush.

[0007] To achieve the above-mentioned purpose, the support assembly of the electric toothbrush provided by the present application comprises a support body and an elastic buffer member:

[0008] The support body comprises a main body portion and a connecting structure connected with each other, the main body portion is formed with a battery mounting cavity, and the connecting structure is provided with a plug-in fitting portion;

[0009] The elastic buffer member comprises a mounting cylinder, the mounting cylinder is formed with a motor mounting cavity, and the mounting cylinder is provided with a motor buffer portion; the motor buffer portion is plug-in fixed with the plug-in fitting portion in the axial direction of the mounting cylinder, so as to connect the support body and the elastic buffer member; wherein,

[0010] The motor buffering portion has a circumferential buffering surface and an axial buffering surface; the plug-in fitting portion has a circumferential fitting surface and an axial fitting surface, the circumferential fitting surface is in abutting fitting with the circumferential buffering surface in the axial direction of the mounting cylinder; the axial fitting surface is in abutting fitting with the axial buffering surface in the axial direction of the mounting cylinder.

[0011] In an embodiment, the plug-in fitting portion comprises a plurality of plug-in protrusions arranged at intervals in the circumferential direction of the mounting cylinder, a first plug-in slot is formed between two adjacent plug-in protrusions; the bottom wall of the first plug-in slot and the end wall of the plug-in protrusion form the axial fitting surface; the side wall of the first plug-in slot and the side wall of the plug-in protrusion form the circumferential fitting surface;

[0012] The motor buffering portion comprises a plurality of second plug-in slots formed in the end wall of the mounting cylinder facing the connecting structure, the plurality of second plug-in slots are arranged at intervals in the circumferential direction of the mounting cylinder, the mounting cylinder forms a buffering protrusion between two adjacent second plug-in slots; the bottom wall of the second plug-in slot and the end wall of the buffering protrusion form the axial buffering surface; the side wall of the second plug-in slot and the side wall of the buffering protrusion form the circumferential buffering surface;

[0013] The plurality of buffering protrusions are one-to-one corresponding and are adapted to be plug-in fixed in the plurality of first plug-in slots; the plurality of plug-in protrusions are one-to-one corresponding and are adapted to be plug-in fixed in the plurality of second plug-in slots.

[0014] In an embodiment, the mounting cylinder further has an inner enclosing wall, the inner enclosing wall encloses to form the motor mounting cavity, the plurality of buffering protrusions are located at the outer peripheral wall of the inner enclosing wall, and the inner enclosing wall is embedded in the inner periphery of the plug-in fitting portion.

[0015] In an embodiment, the connecting structure further comprises a connecting ring and a limiting flange, the connecting ring is connected to one end of the plug-in fitting portion away from the mounting cylinder; the limiting flange is connected to the inner wall surface of the connecting ring; the inner enclosing wall protrudes the buffering protrusion toward the peripheral edge of the main body portion to be embedded in the inner wall surface of the connecting ring and abuts against the limiting flange.

[0016] In an embodiment, the inner wall surface of the inner enclosing wall is provided with a plurality of limiting protrusions extending along the axis of the mounting cylinder, the plurality of limiting protrusions are arranged at intervals in the circumferential direction of the inner enclosing wall, and the protruding height of the limiting protrusions gradually decreases from the mounting cylinder to the side of the main body portion.

[0017] In an embodiment, the inner peripheral wall of the inner enclosing wall is provided with a circumferential limiting portion for limiting the rotation of the motor around the axis thereof.

[0018] In an embodiment, the width of the buffer protrusion in the circumferential direction of the mounting cylinder is greater than the width of the insertion protrusion in the circumferential direction of the connecting ring adjacent thereto.

[0019] In an embodiment, the connecting structure is connected to one end of the main body portion; the width of the buffer protrusion in the circumferential direction of the mounting cylinder is gradually reduced towards the main body portion; the width of the insertion protrusion in the circumferential direction of the mounting cylinder is gradually reduced away from the main body portion.

[0020] In an embodiment, in the circumferential direction of the connecting ring, the width of the buffer protrusion towards the end face of the main body portion is greater than half the maximum width of the buffer protrusion, and the width of the insertion protrusion away from the end face of the main body portion is greater than half the maximum width of the insertion protrusion.

[0021] In an embodiment, the elastic buffer member further comprises an elastic guide strip connected to the mounting cylinder, the elastic guide strip is arranged to extend towards the main body portion in the axial direction of the mounting cylinder; the elastic guide strip is partially embedded and protrudes from the outer circumferential wall of the main body portion, and the outer wall surface of the elastic guide strip is provided with a buffer protrusion.

[0022] In an embodiment, at least two elastic guide strips are arranged in the circumferential direction of the mounting cylinder, and at least two buffer protrusions are arranged in the length extension direction of the elastic guide strip, and the buffer protrusions are arranged around the outer circumferential wall of the elastic guide strip along the axis of the mounting cylinder.

[0023] In an embodiment, the elastic guide strip is formed with an embedded groove between two adjacent buffer protrusions, and the outer circumferential wall of the main body portion is provided with an embedded protrusion matched with the embedded groove.

[0024] In an embodiment, the elastic buffer member further comprises a first enclosing portion, a second enclosing portion and a connecting arm connecting the first enclosing portion and the second enclosing portion arranged in the axial direction of the mounting cylinder;

[0025] The first enclosing portion and the second enclosing portion both extend in the circumferential direction of the main body portion, and the first enclosing portion, the second enclosing portion and the connecting arm are all embedded in the main body portion.

[0026] At least one of the first enclosing portion and the second enclosing portion is connected to a plurality of elastic guide strips.

[0027] In an embodiment, the bracket body and the elastic buffer member are integrally injection molded.

[0028] The application further provides an electric toothbrush, comprising a handle assembly, wherein the handle assembly comprises a shell, a motor installed in the shell, a battery and the support assembly of the electric toothbrush according to any one of the above; the lower end of the motor is installed in the motor installation cavity of the support assembly of the electric toothbrush; and the battery is installed in the battery installation compartment of the support assembly of the electric toothbrush.

[0029] The support assembly of the electric toothbrush comprises the support body and the elastic buffering member, the support body comprises the main body part and the connecting structure which are connected to each other, the battery installation compartment is formed in the main body part, the connecting structure has the plug-in fitting part, the elastic buffering member comprises the installation cylinder, the motor installation cavity is formed in the installation cylinder, the installation cylinder has the motor buffering part, the motor buffering part is plug-in fixed with the plug-in fitting part in the axial direction of the installation cylinder to connect the support body and the elastic buffering member. In this way, the support body for installing the battery and the elastic buffering member for installing the motor are plug-in fixed in the extension direction of the motor shaft, the elastic buffering of the elastic buffering member relative to the support body in the radial direction of the installation cylinder can be ensured. Meanwhile, the support body and the elastic buffering member are connected as a whole, so that the battery and the motor can be fixed to the support assembly together during assembly, and the support assembly is assembled into the shell of the handle as a whole, and the installation efficiency of the internal structure of the handle can be improved.

[0030] The motor buffering part has the circumferential buffering surface and the axial buffering surface, the plug-in fitting part has the circumferential fitting surface and the axial fitting surface, the circumferential fitting surface is abutted and fitted with the circumferential buffering surface in the axial direction of the installation cylinder, the motor buffering part can be elastically deformed relative to the plug-in fitting part in the axial direction of the installation cylinder, the axial fitting surface is abutted and fitted with the axial buffering surface in the axial direction of the installation cylinder, and the motor buffering part can be elastically deformed relative to the plug-in fitting part in the axial direction of the installation cylinder. In this way, the elastic buffering member for installing the motor can realize elastic buffering and damping in the axial direction of the motor shaft, in the axial direction around the motor shaft and in the radial direction of the motor shaft after being fixedly connected with the support body for installing the battery, multi-dimensional damping of the elastic buffering member relative to the support body can be realized, and the damping effect of the entire support assembly can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0032] Figure 1 Fig. 1 shows the structural schematic diagram of an embodiment of the support assembly of the electric toothbrush of the present application;

[0033] Figure 2 Fig. 2 is a perspective view of the support assembly of Fig. 1 ; Figure 1 Fig. 3 is a perspective view of the support assembly of Fig. 1 from another angle;

[0034] Figure 3 Fig. 4 is a transverse sectional view of the support assembly of Fig. 1 ; Figure 2 Fig. 5 is a longitudinal sectional view of the support assembly of Fig. 1 ;

[0035] Figure 4 Fig. 6 is a perspective view of an embodiment of the elastic buffering member of the present application; Figure 1 Fig. 7 is a perspective view of the elastic buffering member of Fig. 6 from another angle;

[0036] Figure 5 Fig. 8 is a perspective view of an embodiment of the support body of the present application; Fig. 9 is a perspective view of the support body of Fig. 8 from another angle;

[0037] Fig. 10 is a perspective view of the support body of Fig. 8 from another angle; Figure 6 Fig. 11 is a perspective view of an embodiment of the electric toothbrush of the present application; Figure 5 Fig. 12 is a perspective view of the electric toothbrush of Fig. 11 from another angle; Fig. 13 is a perspective view of the electric toothbrush of Fig. 11 from another angle;

[0038] Fig. 14 is a perspective view of the electric toothbrush of Fig. 11 from another angle; Figure 7 Fig. 15 is a perspective view of the electric toothbrush of Fig. 11 from another angle; Fig. 16 is a perspective view of the electric toothbrush of Fig. 11 from another angle;

[0039] Fig. 17 is a perspective view of the electric toothbrush of Fig. 11 from another angle; Figure 8 Fig. 18 is a perspective view of the electric toothbrush of Fig. 11 from another angle; Fig. 19 is a perspective view of the electric toothbrush of Fig. 11 from another angle;

[0040] Fig. 20 is a perspective view of the electric toothbrush of Fig. 11 from another angle; Figure 9 Fig. 21 is a perspective view of the electric toothbrush of Fig. 11 from another angle; Figure 8 Fig. 22 is a sectional view of the handle assembly of the electric toothbrush of Fig. 11 from one angle; Fig. 23 is a sectional view of the handle assembly of the electric toothbrush of Fig. 11 from another angle;

[0041] Fig. 24 is a sectional view of the handle assembly of the electric toothbrush of Fig. 11 from another angle; Figure 10 Fig. 25 is a sectional view of the handle assembly of the electric toothbrush of Fig. 11 from another angle; Figure 9 Fig. 26 is an enlarged view of A in Fig. 25; Fig. 27 is an enlarged view of B in Fig. 25;

[0042] Fig. 28 is an enlarged view of C in Fig. 25; Fig. 29 is an enlarged view of D in Fig. 25;

[0043] Fig. 30 is an enlarged view of E in Fig. 25; Reference Name Reference Name Reference Name 10 Brush handle assembly 120 Connecting ring 140 Circumferential limiting portion 100 Support assembly 121 Limiting flange 150 Elastic guide bar 110 Support body 130 Elastic buffer member 151 Buffer convex 111 Main body portion 131 Mounting cylinder 152 Embedding groove 112 Battery mounting compartment 132 Motor mounting cavity 161 First enclosing portion 113 Embedding protrusion 133 Motor buffer portion 162 Second enclosing portion 114 Connecting structure 134 Circumferential buffer surface 163 Connecting arm 115 Plug-in fitting portion 135 Axial buffer surface 200 Housing 116 Circumferential fitting surface 136 Second plug-in groove 300 Motor 117 Axial fitting surface 137 Buffer protrusion 310 Motor shaft 118 Plug-in protrusion 138 Inner enclosing wall 400 Battery 119 First plug-in groove 139 Limiting convex rib 20 Brush head assembly

[0044] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be apparently and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by one of ordinary skill in the art without any creative work fall within the protection scope of the present application. In addition, the technical solutions in each embodiment can be combined with each other, but the combination should be based on the realization by one of ordinary skill in the art. When the combination of the technical solutions appears contradictory or unachievable, it should be considered that the combination of the technical solutions does not exist and is not within the protection scope of the present application.

[0046] It should be noted that if the embodiments of the present application involve directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, motion condition, etc. between components in a certain specific posture, and if the specific posture changes, the directionality indication also changes accordingly.

[0047] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously meet the scheme.

[0048] The present application provides a support assembly of an electric toothbrush.

[0049] In the embodiments of the present application, please refer to Figures 1-4 The support assembly 100 of the electric toothbrush includes a support body 110 and an elastic buffer member 130. The support body 110 includes a main body part 111 and a connecting structure 114 connected to each other, the main body part 111 is formed with a battery mounting cavity 112 inside, and the connecting structure 114 is provided with a plug-in fitting part 115. The elastic buffer member 130 includes a mounting cylinder 131, the mounting cylinder 131 is formed with a motor mounting cavity 132 inside, and the mounting cylinder 131 is provided with a motor buffer part 133; the motor buffer part 133 and the plug-in fitting part 115 are plug-in fixed in the axial direction of the mounting cylinder 131 to connect the support body 110 and the elastic buffer member 130.

[0050] The motor buffer part 133 is provided with a circumferential buffer surface 134 and an axial buffer surface 135; the plug-in fitting part 115 is provided with a circumferential fitting surface 116 and an axial fitting surface 117, the circumferential fitting surface 116 is abutted and fitted with the circumferential buffer surface 134 in the direction around the axis of the mounting cylinder 131; and the axial fitting surface 117 is abutted and fitted with the axial buffer surface 135 in the axial direction of the mounting cylinder 131.

[0051] In the embodiment, the support body 110 can be made of plastic or other hard material. The elastic buffering member 130 can be made of silica gel, rubber or other elastic material. The main body 111 and the connecting structure 114 of the support body 110 can be integrally formed or separately formed. In order to improve the structural strength, the main body 111 and the connecting structure 114 are integrally formed. The connecting structure 114 can be connected to the end of the main body 111 or connected to the middle or the position adjacent to the end of the main body 111, which can be selected and designed according to actual requirements. In order to improve the structural compactness, the connecting structure 114 is connected to the end of the main body 111.

[0052] The battery 400 mounting cavity 112 is formed on the main body 111. Generally, in order to reduce the diameter of the brush handle of the electric toothbrush, the battery 400 is vertically mounted in the brush handle. Therefore, the main body 111 and the battery 400 mounting cavity 112 are longitudinally extended in a strip shape. The shape of the main body 111 can be various, for example, the main body 111 can be a cylinder, a square cylinder or a semi-enclosing frame structure, as long as the battery 400 mounting cavity 112 can be formed for fixing the battery 400. The specific structure and shape of the main body 111 are not limited herein.

[0053] It can be understood that the motor mounting cavity 132 is used to adapt to the lower end of the motor 300, and the cross-sectional shape of the motor mounting cavity 132 can be adaptively adjusted according to the cross-sectional shape of the motor 300 selected by the electric toothbrush, which is not limited herein. In this way, the axis of the mounting cylinder 131 is consistent with the extension direction of the motor shaft 310 of the motor 300. The outer contour shape of the cross section of the mounting cylinder 131 can be circular, oval, square or the like. Since the cross-sectional shape of the brush handle shell of the electric toothbrush is generally circular, in order to better adapt the mounting cylinder 131 to be mounted in the brush handle shell, preferably, the outer contour shape of the cross section of the mounting cylinder 131 is circular.

[0054] The connecting structure 114 of the support body 110 has a plug-in part 115, and the plug-in part is made of a hard material. The mounting cylinder 131 of the elastic buffer member 130 has a motor buffer part 133, and the motor buffer part is made of an elastic material. The motor buffer part 133 and the plug-in part 115 are plug-in fixed in the axial direction of the mounting cylinder 131, and in order to improve the connection stability of the two, avoid the mutual separation of the two in the radial direction of the mounting cylinder 131, the motor buffer part 133 and the plug-in part 115 can also be mutually bonded on the matching surface, or the motor buffer part 133 and the plug-in part 115 are connected through a secondary injection molding process. Through the adaptive plug-in of the plug-in part 115 and the motor buffer part 133 in the axial direction of the mounting cylinder 131, the rotation of the support body 110 relative to the elastic buffer member 130 around the axis of the mounting cylinder 131 and the movement along the axis of the mounting cylinder 131 can be limited. It can be understood that the plug-in part 115 and the motor buffer part 133 are adaptively plugged in the axial direction of the mounting cylinder 131, and the radial assembly of the motor buffer part 133 relative to the plug-in part has the following two cases: one is that the motor buffer part 133 and the plug-in part 115 have abutting surfaces that abut each other in the radial direction; the other is that the motor buffer part 133 and the plug-in part 115 have no abutting surfaces in the radial direction of the mounting cylinder 131, that is, one of the motor buffer part 133 and the plug-in part 115 penetrates in the radial direction of the mounting cylinder 131. Both of the above two cases can achieve the buffering and damping of the motor buffer part 133 relative to the plug-in part 115 in the radial direction of the mounting cylinder 131.

[0055] The motor buffer part 133 has a circumferential buffer surface 134 and an axial buffer surface 135, and the number of the circumferential buffer surface 134 and the axial buffer surface 135 can be one or more, which is not limited here. The number of the circumferential matching surface 116 corresponds to the number of the circumferential buffer surface 134 one by one, and the number of the axial buffer surface 135 corresponds to the number of the axial matching surface 117 one by one. The axial matching surface 117, the axial buffer surface 135, the circumferential matching surface 116, and the circumferential buffer surface 134 can be one of a plane and an arc surface or a combination of a plane and an arc surface, as long as the elastic deformation of the elastic buffer member around the axis of the mounting cylinder 131 can be achieved through the abutting cooperation of the circumferential buffer surface 134 and the circumferential matching surface 116, and the elastic deformation of the elastic buffer member along the axis of the mounting cylinder 131 can be achieved through the abutting cooperation of the axial buffer surface 135 and the axial matching surface 117.

[0056] The shape of the motor buffer portion 133 and the axial fitting portion can be various, for example, one of the motor buffer portion 133 and the circumferential fitting portion can be a convex structure, and the other can be a groove opening towards the convex structure; of course, the motor buffer portion 133 and the circumferential fitting portion can also be a tooth-shaped structure that fits into each other. By making the circumferential buffer surface 134 of the motor buffer portion 133 and the circumferential fitting surface 116 of the fitting portion 115 abut in the axial direction around the mounting cylinder 131, that is, making the motor buffer portion 133 elastically deformable in the axial direction around the mounting cylinder 131; in this way, while ensuring that the support body 110 and the elastic buffer member 130 are limited in the axial direction around the mounting cylinder 131, the elastic buffer member 130 is elastically buffered and damped relative to the support body 110 in the circumferential direction around the mounting cylinder 131. By making the axial buffer surface 135 of the motor buffer portion 133 and the axial fitting surface 117 of the fitting portion 115 abut in the axial direction along the mounting cylinder 131, that is, making the motor buffer portion 133 elastically deformable in the axial direction along the mounting cylinder 131; in this way, while ensuring that the support body 110 and the elastic buffer member 130 are limited in the axial direction along the mounting cylinder 131, the elastic buffer member 130 is elastically buffered and damped relative to the support body 110 in the axial direction along the mounting cylinder 131.

[0057] The support assembly 100 of the electric toothbrush of the present application comprises a support body 110 and an elastic buffer member 130, so that the support body 110 comprises a main body portion 111 and a connecting structure 114 connected to each other, the main body portion 111 is formed with a battery 400 mounting cavity 112 therein, the connecting structure 114 is provided with a fitting portion 115, the elastic buffer member 130 comprises a mounting cylinder 131, the mounting cylinder 131 is formed with a motor mounting cavity 132 therein, the mounting cylinder 131 is provided with a motor buffer portion 133, the motor buffer portion 133 is fitted and fixed with the fitting portion 115 in the axial direction of the mounting cylinder 131, so as to connect the support body 110 and the elastic buffer member 130. In this way, the support body 110 for mounting the battery 400 and the elastic buffer member for mounting the motor 300 are fitted and fixed in the extension direction of the motor shaft 310, so as to ensure that the elastic buffer member is elastically buffered and damped relative to the support body 110 in the radial direction of the mounting cylinder 131. At the same time, the support body 110 and the elastic buffer member are connected as a whole, so that during assembly, the battery 400 and the motor 300 can be fixed together on the support assembly 100, and the support assembly 100 is assembled as a whole into the brush handle shell, so as to improve the installation efficiency of the internal structure of the brush handle.

[0058] And by making the motor buffer portion 133 have a circumferential buffer surface 134 and an axial buffer surface 135, the plug-in portion 115 has a circumferential mating surface 116 and an axial mating surface 117, so that the circumferential mating surface 116 and the circumferential buffer surface 134 are in abutting engagement in the axial direction of the mounting cylinder 131, so that the motor buffer portion 133 can be elastically deformed relative to the plug-in portion 115 in the axial direction of the mounting cylinder 131; the axial mating surface 117 and the axial buffer surface 135 are in abutting engagement in the axial direction of the mounting cylinder 131, so that the motor buffer portion 133 can be elastically deformed relative to the plug-in portion 115 in the axial direction of the mounting cylinder 131. In this way, the elastic buffer member 130 for mounting the motor 300 can realize elastic buffer and shock absorption 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 after being fixedly connected to the bracket body 110 for mounting the battery 400, realizing multi-dimensional shock absorption of the elastic buffer member 130 relative to the bracket body 110, and effectively improving the shock absorption effect of the entire bracket assembly 100.

[0059] In an embodiment, please refer to Figures 1-7 The plug-in portion 115 includes a plurality of plug-in protrusions 118 spaced apart along the circumference of the mounting cylinder 131, and a first plug-in slot 119 is formed between adjacent two plug-in protrusions 118; the bottom wall of the first plug-in slot 119 and the end wall of the plug-in protrusion 118 form an axial mating surface 117; the side wall of the first plug-in slot 119 and the side wall of the plug-in protrusion 118 form a circumferential mating surface 116;

[0060] The motor buffer portion 133 includes a plurality of second plug-in slots 136 formed in the end wall of the mounting cylinder 131 facing the connecting structure 114, and the second plug-in slots 136 are spaced apart along the circumference of the mounting cylinder 131, and the mounting cylinder 131 forms a buffer protrusion 137 between adjacent two second plug-in slots 136; the bottom wall of the second plug-in slot 136 and the end wall of the buffer protrusion 137 form an axial buffer surface 135; the side wall of the second plug-in slot 136 and the side wall of the buffer protrusion 137 form a circumferential buffer surface 134;

[0061] The plurality of buffer protrusions 137 are one-to-one corresponding and plug-in fixed to the plurality of first plug-in slots 119; the plurality of plug-in protrusions 118 are one-to-one corresponding and plug-in fixed to the plurality of second plug-in slots 136.

[0062] In the embodiment, it can be understood that the bottom wall of the first insertion slot 119, the bottom wall of the second insertion slot 136, the end wall of the insertion protrusion 118, and the end wall of the buffer protrusion 137 all refer to the wall surface in the axial direction of the mounting cylinder 131. The side wall of the first insertion slot 119, the side wall of the second insertion slot 136, the side wall of the buffer protrusion 137, and the side wall of the insertion protrusion 118 all refer to the wall surface in the circumferential direction of the mounting cylinder 131. The shapes of the insertion protrusion 118 and the buffer protrusion 137 can be various, for example, can be tooth-shaped, arc-shaped, or the like, which are not specifically limited here. The number of the insertion protrusion 118 and the buffer protrusion 137 can be selected and designed according to actual needs, which are not specifically limited here. The shapes and widths of the plurality of insertion protrusions 118 can be the same or different, which can be selected and designed according to actual needs, which are not specifically limited here. The plurality of insertion protrusions 118 are arranged at intervals in the circumferential direction of the mounting cylinder 131, and the intervals between the adjacent two insertion protrusions 118 can be the same or different. In order to ensure the insertion stability of the insertion fitting part 115 and the motor buffer part 133 in the circumferential direction, the intervals between the adjacent two insertion protrusions 118 are the same. The first insertion slot 119 is formed between the adjacent two insertion protrusions 118.

[0063] The motor buffer part 133 includes a plurality of second insertion slots 136 arranged at intervals in the circumferential direction of the mounting cylinder 131. The second insertion slot is formed in the end wall of the mounting cylinder 131 facing the connecting structure 114, and the second insertion slot is arranged open to the connecting structure 114. The second insertion slot can pass through the inner wall surface and the outer wall surface of the mounting cylinder 131, or can only pass through the inner wall surface or the outer wall surface of the mounting cylinder 131, or can not pass through the inner wall surface and the outer wall surface of the mounting cylinder 131, which are not specifically limited here. The buffer protrusion 137 is formed between the adjacent two second insertion slots 136. During installation, the plurality of insertion protrusions 118 of the insertion fitting part 115 are one-to-one corresponding and adapted to be inserted and fixed in the plurality of second insertion slots 136 of the motor buffer part 133; the plurality of buffer protrusions 137 of the motor buffer part 133 are one-to-one corresponding and adapted to be inserted and fixed in the plurality of first insertion slots 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 with each other, and the stable connection of the bracket body 110 and the elastic buffer member 130 can be achieved.

[0064] The bottom wall of the first insertion groove 119 and the end wall of the insertion protrusion 118 form an axial matching surface 117, and the insertion matching part 115 forms high-low staggered axial matching surfaces 117 in the circumferential direction of the mounting cylinder 131. The bottom wall of the second insertion groove 136 and the end wall of the buffer protrusion 137 form an axial buffer surface 135, and the motor buffer part 133 forms high-low staggered axial buffer surfaces 135 in the circumferential direction of the mounting cylinder 131. The buffer protrusion 137 of the motor buffer part 133 and the two side walls of the second insertion groove 136 in the circumferential direction of the mounting cylinder 131 form a circumferential buffer surface 134, and the first insertion groove 119 and the insertion protrusion 118 of the insertion matching part 115 form a circumferential matching surface 116 in the two side walls in the circumferential direction of the mounting cylinder 131. In this way, when the multiple buffer protrusions 137 of the motor buffer part 133 are adapted and inserted into the multiple first insertion grooves 119 of the insertion matching part 115, and the multiple insertion protrusions 118 of the insertion matching part 115 are adapted and inserted into the multiple second insertion grooves 136 of the motor buffer part 133, in the circumferential direction of the mounting cylinder 131, there are multiple axial buffer surfaces 135 and axial matching surfaces 117 matched with each other, and multiple circumferential buffer surfaces 134 and circumferential matching surfaces 116 matched with each other. Compared with other structures, the engagement force of the motor buffer part 133 and the insertion matching part 115 can be effectively increased, so that the connection of the motor buffer part 133 and the insertion matching part 115 is more stable, at the same time, the axial buffer area and the circumferential buffer area of the motor buffer part 133 and the insertion matching part 115 are effectively increased, the buffering and damping effect of the elastic buffer member 130 on the support body 110 is greatly improved, and the vibration and noise caused by the vibration of the motor 300 on the support assembly 100 are maximized.

[0065] Further, as shown in Figures 1-6 The mounting cylinder 131 also has an inner enclosing wall 138, which forms a motor mounting cavity 132, the multiple buffer protrusions 137 are located on the outer peripheral wall of the inner enclosing wall 138, and the inner enclosing wall 138 is embedded in the inner periphery of the insertion matching part 115.

[0066] In the embodiment, the mounting cylinder 131 is further provided with an inner enclosing wall 138, which encloses the motor mounting cavity 132. Thus, the inner enclosing wall 138 can better conform to the outer circumferential wall of the motor 300, and wrap and radially dampen the motor 300 as a whole. The motor 300 is stably assembled with the mounting cylinder 131, and the damping effect of the entire elastic damping component 130 is further improved. Meanwhile, by arranging the inner enclosing wall 138, the plurality of damping protrusions 137 are located on the outer circumferential wall of the inner enclosing wall 138, the inner enclosing wall 138 is embedded in the inner circumferential wall of the plug-in fitting part 115, and the outer wall surface of the inner enclosing wall 138 forms the inner wall surface of the plurality of second plug-in grooves 136. Thus, when the plurality of plug-in protrusions 118 are adapted and plugged into the plurality of second plug-in grooves 136, the inner wall surface of the plug-in protrusion 118 can abut against the outer wall surface of the inner enclosing wall 138. Thus, the inner enclosing wall 138 can radially limit and dampen the plug-in protrusion 118, and further improve the connection and elastic damping effect of the motor damping part 133 and the plug-in fitting part 115 in the radial direction.

[0067] Further, please refer to Figure 1 and Figure 7 , the connecting structure 114 further comprises a connecting ring 120 and a limiting flange 121. The connecting ring 120 is connected to one end of the plug-in fitting part 115 away from the mounting cylinder 131. The limiting flange 121 is connected to the inner wall surface of the connecting ring 120. The inner enclosing wall 138 protrudes the damping protrusion 137 towards the circumferential edge of the main body part 111 to be embedded in the inner wall surface of the connecting ring 120, and abut against the limiting flange 121.

[0068] In the embodiment, the connecting ring 120 is used to connect the plurality of plug-in protrusions 118, and the connecting ring 120 is adjacent to the end wall of the plug-in protrusion 118 to form the bottom wall of the first plug-in slot 119. In order to ensure the structural strength, the connecting ring 120 is optionally integrally formed with the plurality of plug-in protrusions 118. The height of the connecting ring 120 can be selected and designed according to the required connecting strength of the plug-in fitting part 115. The shape of the limiting flange 121 can be various, for example, can be a circular ring, a wave shape, an arc block shape, etc., which is not specifically limited here. The limiting flange 121 can be integrally formed with the connecting ring 120, or can be separately formed, which is not specifically limited here. The inner circumferential wall 138 of the elastic buffer member 130 is provided with a protruding buffer protrusion 137 towards the circumference of the main body part 111, and the part of the inner circumferential wall 138 protruding buffer protrusion 137 can be embedded in the connecting ring 120 and matched with the connecting ring 120. In this way, the limiting and elastic buffering area of the elastic buffer member 130 and the support body 110 in the radial direction of the mounting cylinder 131 can be increased, so that the connection stability and elastic buffering damping effect of the elastic buffer member 130 and the support body 110 can be further improved. By making the inner circumferential wall 138 of the elastic buffer member 130 abut against the limiting flange 121 of the connecting structure 114, on the one hand, the cooperation of the elastic buffer member 130 and the connecting structure 114 in the axial direction is limited, and on the other hand, the limiting flange 121 can provide sufficient support area and support force for the motor 300 and the elastic buffer member 130, so as to ensure the assembly effect of the whole machine.

[0069] In an embodiment, as shown in Figures 1-6 The inner wall surface of the inner circumferential wall 138 is provided with a plurality of limiting protrusions 139 extending along the axis of the mounting cylinder 131, and the plurality of limiting protrusions 139 are arranged at intervals around the circumference of the inner circumferential wall 138, and the protruding height of the limiting protrusions 139 gradually decreases from the mounting cylinder 131 to the side of the main body part 111.

[0070] In the embodiment, the plurality of limiting ribs are optionally integrally formed with the inner wall 138. The number of the limiting ribs 139 can be selected and designed according to actual requirements. The distance between two adjacent limiting ribs can be the same or different. Since the motor 300 is mounted in the mounting cylinder 131 along the axis of the mounting cylinder 131, by extending the plurality of limiting ribs 139 along the axis of the mounting cylinder 131, the assembly of the motor 300 in the mounting cylinder 131 is facilitated. By gradually reducing the protruding height of the limiting ribs 139 from the mounting cylinder 131 to the side of the main body 111, on the one hand, the installation of the motor 300 in the mounting cylinder 131 is smoother, and on the other hand, the friction between the motor 300 and the inner wall of the mounting cylinder 131 is effectively increased, thereby making the assembly between the motor 300 and the mounting cylinder 131 more stable, and effectively preventing the motor 300 from rotating around the axis in the mounting cylinder 131. At the same time, since the outer peripheral wall of the motor 300 is in contact with the plurality of limiting ribs 139, the outer peripheral wall of the motor 300 and the inner wall of the inner wall 138 have a certain gap, so that the vibration transmitted from the motor 300 to the mounting cylinder 131 is further reduced, thereby improving the buffering effect of the entire elastic buffering member 130.

[0071] In an embodiment, referring again to Figures 1-6 , the inner peripheral wall of the inner wall 138 is provided with a circumferential limiting portion 140 for limiting the rotation of the motor 300 around the axis. The circumferential limiting portion 140 can be a limiting protrusion or a positioning groove. There can be only one circumferential limiting portion 140, or a plurality of circumferential limiting portions 140 can be spaced apart around the inner wall 138. The plurality of circumferential limiting portions 140 can all be limiting protrusions or positioning grooves, or part of them can be limiting protrusions and part of them can be positioning grooves, which are not limited here. By providing the circumferential limiting portion 140 on the inner peripheral wall of the inner wall 138, the motor 300 mounting seat is provided with a circumferential matching portion corresponding to the circumferential limiting portion 140. By providing the circumferential limiting portion 140 on the inner peripheral wall of the inner wall 138, after the motor 300 is mounted in the mounting cylinder 131, the circumferential limiting portion 140 cooperates with the circumferential matching portion of the motor 300 mounting seat to limit the rotation of the motor 300 around the axis.

[0072] In an embodiment, as shown in Figures 1-3 , the width of at least part of the buffering protrusions 137 in the circumferential direction of the mounting cylinder 131 is greater than the width of the adjacent plug-in protrusions 118 in the circumferential direction of the connecting ring 120.

[0073] In the embodiment, it can be understood that the buffer protrusions 137 are elastically deformable and mainly serve as elastic buffers, and the insertion protrusions 118 are made of hard material and mainly serve as supports. By making the width of at least part of the buffer protrusions 137 in the circumferential direction of the mounting cylinder 131 greater than the width of the insertion protrusions 118 adjacent thereto, the structural strength of the buffer protrusions 137 can be improved so that the buffer protrusions 137 will not be unable to recover due to excessive deformation when subjected to a greater impact force, thereby prolonging the service life of the entire support assembly 100 and ensuring product quality.

[0074] In an embodiment, please refer to Figures 1-7 The connecting structure 114 is connected to one end of the main body 111; the width of the buffer protrusions 137 in the circumferential direction of the mounting cylinder 131 gradually decreases toward the main body 111; and the width of the insertion protrusions 118 in the circumferential direction of the mounting cylinder 131 gradually decreases away from the main body 111.

[0075] In the embodiment, the width of the buffer protrusions 137 in the mounting cylinder 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., the buffer protrusions 137 and the insertion protrusions 118 are both conical structures with wide roots and narrow tops. In this way, on the one hand, the insertion of the buffer protrusions 137 and the insertion protrusions 118 is guided, and the insertion and cooperation between the buffer protrusions 137 and the first insertion grooves 119 and between the insertion protrusions 118 and the second insertion grooves 136 are facilitated; on the other hand, the connection strength of the buffer protrusions 137 on the mounting cylinder 131 and the connection strength of the insertion protrusions 118 on the connecting ring 120 can be ensured, and the buffer protrusions 137 and the insertion protrusions 118 can be prevented from being broken due to excessive vibration or long-term use.

[0076] Further, in the circumferential direction of the connecting ring 120, the width of the buffer protrusions 137 toward the end face of the main body 111 is greater than half of the maximum width of the buffer protrusions 137, and the width of the insertion protrusions 118 away from the end face of the main body 111 is greater than half of the maximum width of the insertion protrusions 118.

[0077] In the embodiment, it can be understood that the end face of the buffer protrusion 137 towards the main body part 111 is the axial buffer face 135, and the end face of the insertion protrusion 118 away from the main body part 111 is the axial matching face 117. If the width of the end face of the buffer protrusion 137 towards the main body part 111 is less than half of the maximum width of the buffer protrusion 137, and the width of the end face of the insertion protrusion 118 away from the main body part 111 is less than half of the maximum width of the insertion protrusion 118, the width of the axial buffer face 135 and the axial matching face 117 is too small, and the contact area of the two is too small, so that the end of the insertion protrusion 118 and the end of the buffer protrusion 137 are easily deformed, which is not conducive to the support body 110 and the elastic buffer member 130 to withstand excessive impact force in the axial direction of the mounting cylinder 131. By making the width of the end face of the buffer protrusion 137 towards the main body part 111 greater than half of the maximum width of the buffer protrusion 137, and the width of the end face of the insertion protrusion 118 away from the main body part 111 greater than half of the maximum width of the insertion protrusion 118, the contact area of the buffer protrusion 137 and the insertion protrusion 118 in the axial direction of the mounting cylinder 131 is large enough, so that the end of the buffer protrusion 137 and the end of the insertion protrusion 118 are not easily deformed, and the support body 110 and the elastic buffer member 130 can withstand greater impact force in the axial direction of the mounting cylinder 131, so that the entire support assembly 100 has better buffering and shock-absorbing effect in the axial direction of the mounting cylinder 131.

[0078] In an embodiment, as shown in Figures 1-3 、 Figures 5-7 、 Figure 9 and Figure 10 , the elastic buffer member 130 further comprises an elastic guide strip 150 connected to the mounting cylinder 131, the elastic guide strip 150 extends along the axial direction of the mounting cylinder 131 towards the main body part 111; the elastic guide strip 150 is partially embedded and protrudes from the outer peripheral wall of the main body part 111, and the outer wall surface of the elastic guide strip 150 is provided with a buffer protrusion 151.

[0079] In the embodiment, in order to ensure the connection strength, the elastic guide bars 150 are optionally integrally formed with the mounting cylinder 131, and the buffer protrusions 151 are integrally formed with the elastic guide bars 150. The number of the elastic guide bars 150 can be one, two, or more. When the number of the elastic guide bars 150 is more than one, the plurality of elastic guide bars 150 can be arranged at intervals along the circumference of the mounting cylinder 131. The number of the buffer protrusions 151 can be one or more arranged at intervals along the length of the elastic guide bars 150. The elastic guide bars 150 are arranged with part embedded in and part protruding from the outer circumferential wall of the main body 111, so as to avoid the elastic guide bars 150 being suspended and to ensure the stability of the connection between the elastic guide bars 150 and the main body 111. By making the elastic guide bars 150 protrude from the outer circumferential wall of the main body 111, the outer wall surface of the elastic guide bars 150 is provided with the buffer protrusions 151. When the support assembly 100 is installed in the shell of the brush handle, the entire support assembly 100 is in contact with the shell of the brush handle through the buffer protrusions 151, so as to effectively buffer the support body 110 and the shell of the brush handle and further reduce the vibration transmitted from the support assembly 100 to the brush handle.

[0080] Further, the mounting cylinder 131 is arranged with at least two elastic guide bars 150 at intervals along the circumference, and the elastic guide bars 150 are arranged with at least two buffer protrusions 151 at intervals along the length extension direction of the elastic guide bars 150, and the buffer protrusions 151 are arranged around the outer circumferential wall of the elastic guide bars 150 along the axis of the mounting cylinder 131.

[0081] In the embodiment, by arranging at least two elastic guide bars 150 at intervals along the circumference of the mounting cylinder 131, the mounting cylinder 131 and the support body 110 can be elastically abutted with the shell of the brush handle on both sides along the circumference through the buffer protrusions 151, so as to ensure the uniformity of the buffer stress between the entire support assembly 100 and the shell of the brush handle and to improve the overall buffer and shock absorption effect. By arranging at least two buffer protrusions 151 at intervals along the length extension direction of the elastic guide bars 150, the elastic buffer area and the buffer effect between the support assembly 100 and the shell of the brush handle can be further increased. By arranging the buffer protrusions 151 around the outer circumferential wall of the elastic guide bars 150 along the axis of the mounting cylinder 131, that is, the outer wall surface of the buffer protrusions 151 protrudes from the circumferential side wall of the corresponding elastic guide bar 150. In this way, when the elastic guide bars 150 are matched with the guide grooves of the shell of the brush handle, the circumferential side of the elastic guide bars 150 is abutted and matched with the inner wall surface of the guide grooves through the buffer protrusions 151, so as to realize the buffer and shock absorption of the support body 110 along the radial direction and the circumferential direction and to improve the overall shock absorption effect.

[0082] In an embodiment, please refer to Figures 1-3 , Figures 5-7 , Figure 9 and Figure 10The elastic guide strip 150 is formed with an embedding groove 152 between two adjacent buffer protrusions 151, and the outer circumferential wall of the main body part 111 is provided with an embedding protrusion 113 matched with the embedding groove 152. In this way, the connection between the elastic guide strip 150 and the main body part 111 is more stable and reliable while ensuring the buffering effect. Alternatively, the elastic guide strip 150 and the main body part 111 are integrally injection molded.

[0083] On the basis of the above embodiment in which at least two elastic guide strips 150 are arranged in the circumferential direction of the mounting cylinder 131, further, as shown in Figure 1 、 Figure 4 、 Figure 5 and Figure 6 , the elastic buffer member 130 further comprises a first enclosing part 161, a second enclosing part 162 and a connecting arm 163 connecting the first enclosing part 161 and the second enclosing part 162, which are arranged in the axial direction of the mounting cylinder 131;

[0084] The first enclosing part 161 and the second enclosing part 162 both extend in the circumferential direction of the main body part 111, and the first enclosing part 161, the second enclosing part 162 and the connecting arm 163 are all embedded in the main body part 111;

[0085] At least one of the first enclosing part 161 and the second enclosing part 162 is connected to the plurality of elastic guide strips 150.

[0086] In the embodiment, in order to ensure the structural strength, the first enclosing part 161, the second enclosing part 162, the connecting arm 163 and the mounting cylinder 131 are integrally formed. In order to facilitate the disassembly and assembly of the battery 400, the first enclosing part 161 and the second enclosing part 162 are specifically provided as a half-enclosing ring structure. The connecting arm 163 extends along the axis of the mounting cylinder 131 to connect the middle part of the first enclosing part 161 and the second enclosing part 162. At least one of the first enclosing part 161 and the second enclosing part 162 is connected to the plurality of elastic guide strips 150, which can provide support for the plurality of elastic guide strips 150 and make the overall structure of the elastic buffer member 130 more compact and stable. By providing the first enclosing part 161, the second enclosing part 162 and the connecting arm 163, the first enclosing part 161, the second enclosing part 162 and the connecting arm 163 are embedded in the main body part 111, which can effectively increase the connection area between the elastic buffer member 130 and the main body part 111, realize multi-angle connection between the elastic buffer member 130 and the main body part 111, and further ensure the connection effect of the two, on the other hand, the elastic buffer member 130 is elastically buffered with the connecting structure 114 of the support body 110 through the mounting cylinder 131, and the elastic buffer member 130 is elastically buffered with the main body part 111 of the support body 110 through the first enclosing part 161, the second enclosing part 162 and the connecting arm 163, which can further increase the elastic buffer connection area between the elastic buffer member 130 and the support body 110, and further enhance the overall buffer and shock absorption effect of the support assembly 100 of the electric toothbrush.

[0087] Further, the support body 110 and the elastic buffer member 130 are integrally injection molded. Specifically, a secondary injection molding process is adopted to injection mold the elastic buffer member 130 on the hard support body 110. By integrally injection molding the support body 110 and the elastic buffer member 130, the connection precision between the support body 110 and the elastic buffer member 130 can be ensured, and the overall connection strength can be improved to more effectively realize the overall buffer and shock absorption effect.

[0088] The application also provides an electric toothbrush, which will be described below. Figures 8-10The electric toothbrush comprises a brush handle assembly 10, the brush handle assembly 10 comprises a shell, a motor 300 installed in the shell, a battery 400 and a support assembly 100 of the electric toothbrush, the specific structure of the support assembly 100 of the electric toothbrush refers to the above-mentioned embodiments, the lower end of the motor 300 is installed in the motor installation cavity 132 of the support assembly 100 of the electric toothbrush; the battery 400 is installed in the battery 400 installation bin 112 of the support assembly 100 of the electric toothbrush; since all the technical solutions of the above-mentioned embodiments are adopted in the electric toothbrush, all the beneficial effects brought by the technical solutions of the above-mentioned embodiments are at least possessed, and here is not repeated. The specific structure of the motor 300 and the battery 400 can refer to the existing design, and is not specifically limited here. Specifically, the brush handle assembly 10 further comprises a control assembly, and the motor 300 and the battery 400 are electrically connected through the control assembly. The electric toothbrush further comprises a brush head assembly 20, and the brush head assembly 20 is detachably connected with the motor shaft 310 of the brush handle assembly 10. The specific structure of the brush head assembly 20 and the detachable connection mode of the brush head assembly 20 and the motor shaft 310 can refer to the existing design, and is not repeated here.

[0089] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions out of the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A support assembly for an electric toothbrush, characterized in that, The application relates to a bracket body and a flexible buffering component. The bracket body is made of a hard material and comprises a main body and a connecting structure, the main body is internally provided with a battery mounting bin, and the connecting structure is provided with a plug-in matching part. The flexible buffering component comprises a mounting cylinder, the mounting cylinder is internally provided with a motor mounting cavity, and the mounting cylinder is provided with a motor buffering part. The motor buffering part is plug-in fixed with the plug-in matching part in the axial direction of the mounting cylinder to connect the bracket body and the flexible buffering component. The motor buffering part is provided with a circumferential buffering surface and an axial buffering surface. The plug-in matching part is provided with a circumferential matching surface and an axial matching surface. The plug-in matching part comprises a plurality of plug-in protrusions which are arranged at intervals in the circumferential direction of the mounting cylinder.

2. The holder assembly of the electric toothbrush according to claim 1, wherein The first plug-in slot is provided with a bottom wall and an end wall of the plug-in protrusion.

3. The holder assembly of the electric toothbrush according to claim 2, wherein The motor buffering part is provided with a plurality of second plug-in slots which are arranged at intervals in the circumferential direction of the mounting cylinder.

4. The holder assembly of the electric toothbrush according to claim 2, wherein The second plug-in slot is provided with a bottom wall and an end wall of the buffering protrusion.

5. The holder assembly of the electric toothbrush according to claim 2, wherein The second plug-in slot is provided with a side wall and a side wall of the buffering protrusion.

6. The holder assembly of the electric toothbrush according to any one of claims 1 to 5, wherein The buffering protrusion is plug-in fixed in the first plug-in slot. The plug-in protrusion is plug-in fixed in the second plug-in slot. The mounting cylinder is further provided with an inner surrounding wall. The inner surrounding wall is provided with a plurality of limiting convex ribs which extend along the axis of the mounting cylinder. The limiting convex ribs are arranged at intervals in the circumferential direction of the inner surrounding wall. The limiting convex ribs gradually decrease in height from the mounting cylinder to the main body. The inner surrounding wall is provided with a circumferential limiting part for limiting the rotation of the motor. The width of the buffering protrusion in the circumferential direction of the mounting cylinder is greater than that of the plug-in protrusion adjacent to the buffering protrusion.

7. The holder assembly of the electric toothbrush according to any one of claims 1 to 5, wherein The connecting structure is connected to one end of the main body part; the width of the buffer protrusion in the circumferential direction of the mounting cylinder gradually decreases towards the main body part; the width of the insertion protrusion in the circumferential direction of the mounting cylinder gradually decreases away from the main body part.

8. The holder assembly of the electric toothbrush according to claim 7, wherein In the circumferential direction of the mounting cylinder, the width of the buffer protrusion towards the end face of the main body part is greater than half the maximum width of the buffer protrusion, and the width of the insertion protrusion away from the end face of the main body part is greater than half the maximum width of the insertion protrusion.

9. The holder assembly of the electric toothbrush according to any one of claims 1 to 5, wherein The elastic buffer member further comprises an elastic guide strip connected to the mounting cylinder, which extends along the axial direction of the mounting cylinder towards the main body part; the elastic guide strip is partially embedded and protrudes from the outer circumferential wall of the main body part, and the outer wall surface of the elastic guide strip is provided with a buffer bump.

10. The holder assembly of the electric toothbrush according to claim 9, wherein At least two elastic guide strips are arranged in the circumferential direction of the mounting cylinder, and at least two buffer bumps are arranged in the length extension direction of the elastic guide strips, and the buffer bumps are arranged around the outer circumferential wall of the elastic guide strips along the axis of the mounting cylinder.

11. The holder assembly of the electric toothbrush according to claim 10, wherein The elastic guide strip is formed with an embedded groove between two adjacent buffer bumps, and the outer circumferential wall of the main body part is provided with an embedded protrusion matched with the embedded groove.

12. The holder assembly of the electric toothbrush according to claim 10, wherein The elastic buffer member further comprises a first enclosing part, a second enclosing part arranged in the axial direction of the mounting cylinder, and a connecting arm connecting the first enclosing part and the second enclosing part; The first enclosing part and the second enclosing part both extend along the circumferential direction of the main body part, and the first enclosing part, the second enclosing part and the connecting arm are all embedded in the main body part; At least one of the first enclosing part and the second enclosing part is connected to a plurality of elastic guide strips.

13. The holder assembly of the electric toothbrush according to claim 1, wherein The support body and the elastic buffer member are integrally injection molded.

14. An electric toothbrush, characterized by The toothbrush comprises a brush handle assembly, the brush handle assembly comprising a housing, a motor mounted in the housing, a battery and a support assembly of the electric toothbrush according to any one of claims 1 to 13; the lower end of the motor is mounted in the motor mounting cavity of the support assembly of the electric toothbrush; and the battery is mounted in the battery mounting cavity of the support assembly of the electric toothbrush.

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