CN219878347U - Bracket assembly of electric toothbrush and electric toothbrush - Google Patents

Abstract

The embodiment of the utility model discloses a bracket assembly of an electric toothbrush and the electric toothbrush, wherein the bracket assembly of the electric toothbrush comprises a bracket body and an elastic buffer member; the bracket body comprises a main body part and a connecting structure which are connected with each other, a battery mounting bin is formed in the main body part, and the connecting structure is provided with an inserting matching part; the elastic buffer component comprises a mounting cylinder, a motor mounting cavity is formed in the mounting cylinder, and the mounting cylinder is provided with a motor buffer part; the motor buffer part and the plug-in matching part are fixedly plugged in the axial direction of the mounting cylinder so as to connect the bracket body and the elastic buffer member; the motor buffer part is provided with a circumferential buffer surface and an axial buffer surface; the plug-in matching part is provided with a circumferential matching surface and an axial matching surface, and the circumferential matching surface is in abutting fit with the circumferential buffer surface in the axial direction around the mounting cylinder; the axial matching surface is in abutting fit with the axial buffer surface in the axial direction of the mounting cylinder. The bracket component of the electric toothbrush can realize multidimensional damping and effectively improve the damping effect of the whole bracket component.

Description

Bracket assembly of electric toothbrush and electric toothbrush

Technical Field

The utility model relates to the technical field of electric toothbrushes, in particular to a bracket assembly of an electric toothbrush and the electric toothbrush.

Background

With the increasing level of living of people, the use rate and popularity of electric toothbrushes are also increasing. The handle assembly of the electric toothbrush includes a housing, a motor, a battery, a mounting bracket for securing the motor and battery within the housing, and the like. When the brush head is used, the motor shaft extending out of the shell is connected with the brush head in a matched mode, the battery supplies power for the motor, and the brush head is driven to vibrate through the driving shaft of the motor.

In order to improve the assembly efficiency of the internal structure of the brush handle, the current product usually connects the motor bracket and the battery bracket as a whole, so that the battery and the motor are fixed on the mounting bracket together, and can be integrally assembled into the shell through the mounting bracket. However, the high-frequency vibration of the motor can be directly transmitted to the mounting bracket, so that the whole brush handle of the electric toothbrush has strong shock.

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

The foregoing is merely provided to facilitate an understanding of the principles of the utility model and is not admitted to be prior art.

Disclosure of Invention

In view of the above problems, the present utility model provides a bracket assembly of an electric toothbrush, which aims to solve the technical problems of strong shock feeling and poor shock absorbing effect of the electric toothbrush.

In order to achieve the above object, the present utility model provides a holder assembly for an electric toothbrush, comprising a holder body and an elastic buffer member:

the bracket body comprises a main body part and a connecting structure which are connected with each other, a battery mounting bin is formed in the main body part, and the connecting structure is provided with an inserting matching part;

the elastic buffer component comprises a mounting cylinder, a motor mounting cavity is formed in the mounting cylinder, and the mounting cylinder is provided with a motor buffer part; the motor buffer part and the plug-in matching part are fixedly plugged in the axial direction of the mounting cylinder so as to connect the bracket body and the elastic buffer member; wherein,,

the motor buffer part is provided with a circumferential buffer surface and an axial buffer surface; the plug-in matching part is provided with a circumferential matching surface and an axial matching surface, and the circumferential matching surface is in abutting fit with the circumferential buffer surface in the axial direction around the mounting cylinder; the axial matching surface is in abutting fit with the axial buffer surface in the axial direction of the mounting cylinder.

In an embodiment, the plugging matching part comprises a plurality of plugging protrusions which are arranged at intervals along the circumferential direction of the mounting cylinder, and a first plugging groove is formed between two adjacent plugging protrusions; the bottom wall of the first inserting groove and the end wall of the inserting protrusion form the axial matching surface; the side wall of the first inserting groove and the side wall of the inserting protrusion form the circumferential matching surface;

the motor buffer part comprises a plurality of second inserting grooves which are formed in the end wall of the mounting cylinder facing the connecting structure, the second inserting grooves are arranged at intervals along the circumferential direction of the mounting cylinder, and buffer bulges are formed between two adjacent second inserting grooves of the mounting cylinder; the bottom wall of the second inserting groove and the end wall of the buffer bulge form the axial buffer surface; the side wall of the second inserting groove and the side wall of the buffer bulge form the circumferential buffer surface;

the buffer bulges are in one-to-one correspondence and are adapted to be inserted and fixed in the first inserting grooves; the plugging protrusions are in one-to-one correspondence and are adapted to be plugged and fixed in the second plugging grooves.

In an embodiment, the mounting cylinder further has an inner peripheral wall, the inner peripheral wall encloses and forms the motor mounting cavity, a plurality of buffer protrusions are located on the outer peripheral wall of the inner peripheral wall, and the inner peripheral wall is embedded in the inner periphery of the plug-in matching portion.

In an embodiment, the connecting structure further comprises a connecting ring and a limiting flange, wherein the connecting ring is connected to one end of the plugging matching part, which is away from the mounting cylinder; the limit flange is connected to the inner wall surface of the connecting ring; the inner peripheral wall protrudes towards the periphery of the main body part to be embedded in the inner wall surface of the connecting ring and is abutted to the limit flange.

In an embodiment, the inner wall surface of the inner wall is provided with a plurality of spacing ribs extending along the axis of the mounting cylinder, the spacing ribs are arranged around the circumference of the inner wall at intervals, and the protruding height of the spacing ribs is gradually reduced from the mounting cylinder to one side of the main body part.

In one embodiment, the inner peripheral wall of the inner peripheral wall is provided with a circumferential limit portion for limiting the rotation of the motor around the axis thereof.

In an embodiment, at least part of the buffer projections have a larger width in the circumferential direction of the mounting cylinder than the adjacent plug projections.

In one embodiment, the connecting structure is connected to one end of the main body; the width of the buffer bulge in the circumferential direction of the mounting cylinder is gradually reduced towards the main body part; the width of the inserting protrusion in the circumferential direction of the mounting cylinder is gradually reduced away from the main body part.

In an embodiment, in the circumferential direction of the connection ring, the width of the end surface of the buffer protrusion facing the main body is greater than half of the maximum width of the buffer protrusion, and the width of the end surface of the plug protrusion facing away from the main body is greater than half of the maximum width of the plug protrusion.

In an embodiment, the elastic buffer member further comprises an elastic guide bar connected to the mounting cylinder, and the elastic guide bar extends towards the main body part along the axial direction of the mounting cylinder; the elastic guide strip part is embedded and protrudes out of the outer peripheral wall of the main body part, and a buffering convex hull is arranged on the outer wall surface of the elastic guide strip.

In an embodiment, at least two elastic conducting bars are arranged at intervals in the circumferential direction of the mounting cylinder, at least two buffering convex hulls are arranged at intervals in the length extending direction of the elastic conducting bars, and the buffering convex hulls are arranged around the outer peripheral wall of the elastic conducting bars around the axis of the mounting cylinder.

In an embodiment, the elastic conducting bar is formed with an embedded groove between two adjacent buffer convex hulls, and an embedded protrusion matched with the embedded groove is arranged on the peripheral wall of the main body part.

In an embodiment, the elastic buffer member further comprises a first enclosing part, a second enclosing part and a connecting arm, wherein the first enclosing part and the second enclosing part are arranged at intervals in the axial direction of the mounting cylinder;

The first enclosing part and the second enclosing part extend along the circumferential direction of the main body part, and the first enclosing part, the second enclosing part and the connecting arm are embedded in the main body part;

at least one of the first enclosing part and the second enclosing part is connected with a plurality of elastic conducting bars.

In one embodiment, the bracket body is integrally injection molded with the elastic cushioning member.

The utility model also provides an electric toothbrush, which comprises a brush holder assembly, wherein the brush holder assembly comprises a shell, a motor, a battery and a bracket assembly of the electric toothbrush, wherein the motor and the battery are arranged in the shell; the lower end of the motor is arranged in a motor mounting cavity of the bracket component of the electric toothbrush; the battery is mounted in a battery mounting bin of a bracket assembly of the electric toothbrush.

The bracket component of the electric toothbrush comprises a bracket body and an elastic buffer member, wherein the bracket body comprises a main body part and a connecting structure which are connected with each other, a battery mounting bin is formed in the main body part, the connecting structure is provided with an inserting matching part, the elastic buffer member comprises a mounting cylinder, a motor mounting cavity is formed in the mounting cylinder, the mounting cylinder is provided with a motor buffer part, and the motor buffer part and the inserting matching part are inserted and fixed in the axial direction of the mounting cylinder so as to connect the bracket body and the elastic buffer member. Therefore, the support body for installing the battery and the elastic buffer piece for installing the motor are fixedly inserted in the extending direction of the motor shaft, and the elastic buffer piece can be ensured to elastically buffer and damp in the radial direction of the installation cylinder relative to the support body. Simultaneously, make support body and elastic buffer connect as wholly, then when the assembly, can be together fixed to this bracket component with battery and motor to in the brush holder casing is wholly assembled through this bracket component, then can improve brush holder inner structure's installation effectiveness.

The motor buffer part is provided with a circumferential buffer surface and an axial buffer surface, the plug-in matching part is provided with a circumferential matching surface and an axial matching surface, so that the circumferential matching surface is in abutting fit with the circumferential buffer surface in the axial direction around the mounting cylinder, and the motor buffer part can elastically deform relative to the plug-in matching part in the axial direction around the mounting cylinder; the axial matching surface and the axial buffer surface are in abutting fit in the axial direction of the mounting cylinder, so that the motor buffer part can elastically deform relative to the plug-in matching part in the axial direction of the mounting cylinder. So, after being used for installing the elastic buffer component of motor and being used for installing the support body fixed connection of battery, can all realize elastic buffer shock attenuation along the axis direction of motor shaft, around the axis direction of motor shaft, in the radial of motor shaft, realize the multidimension degree shock attenuation of elastic buffer component relative support body, can effectively promote the shock attenuation effect of whole bracket component.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing the construction of an embodiment of a holder assembly of an electric toothbrush of the present utility model;

FIG. 2 is a schematic view of the bracket assembly of FIG. 1 at another angle;

FIG. 3 is a transverse cross-sectional view of the bracket assembly of FIG. 2;

FIG. 4 is a longitudinal cross-sectional view of the bracket assembly of FIG. 1;

FIG. 5 is a schematic view of an elastic buffer member according to an embodiment of the present utility model;

FIG. 6 is a schematic view of the elastic cushioning member of FIG. 5 at another angle;

FIG. 7 is a schematic view of an embodiment of a bracket body according to the present utility model;

FIG. 8 is a schematic view of an embodiment of an electric toothbrush of the present utility model;

FIG. 9 is an angular cross-sectional view of the handle assembly of the electric toothbrush of FIG. 8;

fig. 10 is a partial enlarged view at a in fig. 9.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name	Reference numerals	Name of the name
						10	Brush handle assembly	120	Connecting ring	140	Circumferential limit part
100	Bracket assembly	121	Limiting flange	150	Elastic conducting bar
						110	Bracket body	130	Elastic buffer member	151	Buffering convex hull
111	Main body part	131	Mounting cylinder	152	Embedded groove
						112	Battery mounting bin	132	Motor installation cavity	161	First enclosing part
113	Embedding bulge	133	Motor buffer part	162	A second enclosing part
						114	Connection structure	134	Circumferential buffer surface	163	Connecting arm
115	Plug-in fitting part	135	Axial buffer surface	200	Shell body
						116	Circumferential mating surface	136	Second inserting groove	300	Motor with a motor housing
117	Axial mating surface	137	Buffer bump	310	Motor shaft
						118	Plug-in protrusion	138	Inner wall	400	Battery cell
119	First inserting groove	139	Spacing protruding muscle	20	Brush head assembly

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is involved in the embodiment of the present utility model, the directional indication is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time.

The utility model provides a bracket component of an electric toothbrush.

In an embodiment of the present utility model, referring to fig. 1 to 4, a bracket assembly 100 of the electric toothbrush includes a bracket body 110 and an elastic buffer member 130. The holder body 110 includes a main body portion 111 and a connection structure 114 connected to each other, a battery 400 mounting compartment 112 is formed in the main body portion 111, and the connection structure 114 has a plug-in fitting portion 115. The elastic buffer member 130 includes a mounting cylinder 131, a motor mounting cavity 132 is formed in the mounting cylinder 131, and the mounting cylinder 131 has a motor buffer portion 133; the motor buffer part 133 is inserted and fixed with the insertion fitting part 115 in the axial direction of the mounting cylinder 131 to connect the bracket body 110 and the elastic buffer member 130.

The motor buffer 133 has a circumferential buffer surface 134 and an axial buffer surface 135; the plug engagement portion 115 has a circumferential engagement surface 116 and an axial engagement surface 117, the circumferential engagement surface 116 being in abutting engagement with the circumferential buffer surface 134 in the axial direction around the mounting cylinder 131; the axial mating surface 117 is in abutting engagement with the axial buffer surface 135 in the axial direction of the mounting tube 131.

In this embodiment, the bracket body 110 may be plastic or other hard materials. The elastic buffer member 130 may be made of elastic material such as silicone rubber or rubber. The main body 111 and the connection structure 114 of the bracket body 110 may be integrally formed, or may be separately formed, and in order to improve structural strength, the main body 111 and the connection structure 114 may be integrally formed. The connection structure 114 may be connected to an end of the main body 111, or may be connected to a middle portion or a position adjacent to an end of the main body 111, and may be selected and designed according to practical requirements. In order to improve the structural compactness, the connection structure 114 is optionally connected to an end of the main body portion 111.

The body portion 111 has a battery 400 mounting compartment 112 formed thereon, typically in order to reduce the diameter of the handle of the electric toothbrush such that the battery 400 is mounted vertically within the handle. The body 111 and the battery 400 mounting compartment 112 are formed in an elongated shape extending in the longitudinal direction as a whole. The shape of the main body 111 may be any of a wide variety, for example, the main body 111 may be a cylinder, a square cylinder, or a semi-enclosed frame structure, and the battery 400 may be fixedly mounted by forming the battery 400 mounting chamber 112, and the specific structure and shape of the main body 111 are not particularly limited.

It will be appreciated that the motor mounting cavity 132 is configured to fit into the lower end of the motor 300, and the cross-sectional shape of the motor mounting cavity 132 may be adapted according to the cross-sectional shape of the motor 300 selected for the electric toothbrush, and is not particularly limited herein. In this way, the axis of the mounting cylinder 131 is made to coincide with the extending direction of the motor shaft 310 of the motor 300. The outer contour shape of the cross section of the mounting cylinder 131 may be provided in a circular shape, an elliptical shape, a square shape, or the like. Since the cross-sectional shape of the handle housing of the electric toothbrush is generally circular, in order to allow the mounting barrel 131 to fit better within the handle housing, it is preferable that the outer contour shape of the cross-section of the mounting barrel 131 be circular.

The connecting structure 114 of the bracket body 110 has a plug-in mating portion 115, which is made of a hard material. The mounting cylinder 131 of the elastic buffer member 130 has a motor buffer portion 133, and the motor buffer portion 133 is an elastic material. The motor buffer part 133 and the plug-in matching part 115 are fixedly plugged in the axial direction of the mounting barrel 131, so that the motor buffer part 133 and the plug-in matching part 115 are prevented from being separated from each other in the radial direction of the mounting barrel 131, or the motor buffer part 133 and the plug-in matching part 115 are connected through a secondary injection molding process. By the fitting and inserting of the inserting and matching part 115 and the motor buffer part 133 in the axial direction of the mounting barrel 131, the rotation of the bracket body 110 relative to the elastic buffer member 130 on the axis around the mounting barrel 131 and the movement along the axis of the mounting barrel 131 can be limited. It can be understood that, when the plug-in matching portion 115 and the motor buffer portion 133 are plugged in an axial direction of the mounting barrel 131, the motor buffer portion 133 is assembled radially with respect to the plug-in portion, wherein one of the two conditions is that the motor buffer portion 133 and the plug-in matching portion 115 have abutting surfaces that mutually abut and match in a radial direction; the other is an abutment surface where the motor buffer portion 133 and the plug engagement portion 115 are not in abutment engagement in the radial direction of the mounting tube 131, that is, one of the motor buffer portion 133 and the plug engagement portion 115 penetrates in the radial direction of the mounting tube 131. Both of the above cases can realize the cushioning vibration reduction of the motor cushioning portion 133 with respect to the insertion fitting portion 115 in the radial direction of the mounting tube 131.

The motor damper portion 133 has a circumferential damper surface 134 and an axial damper surface 135, and the number of the circumferential damper surface 134 and the axial damper surface 135 may be one or plural, and is not particularly limited herein. The number of circumferential mating surfaces 116 is one-to-one with the number of circumferential relief surfaces 134, and the number of axial relief surfaces 135 and axial mating surfaces 117 is one-to-one. The axial mating surface 117, the axial buffer surface 135, the circumferential mating surface 116, and the circumferential buffer surface 134 may be one of a plane and an arc surface, or a combination of a plane and an arc surface, and only elastic deformation of the elastic buffer member on the axis around the mounting cylinder 131 can be achieved through abutting and mating of the circumferential buffer surface 134 and the circumferential mating surface 116, and elastic deformation of the elastic buffer member on the axis along the mounting cylinder 131 can be achieved through abutting and mating of the axial buffer surface 135 and the axial mating surface 117.

The shapes of the motor buffer portion 133 and the axial mating portion may be many, for example, one of the motor buffer portion 133 and the circumferential mating portion may be a convex structure, and the other may be a groove opening toward the convex structure; of course, the motor buffer portion 133 and the circumferential mating portion may also be a tooth-like structure that is mutually inserted and mated. By abutting-fitting the circumferential buffer surface 134 of the motor buffer portion 133 with the circumferential fitting surface 116 of the plug fitting portion 115 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, the elastic buffer member 130 is elastically buffered and damped in the circumferential direction around the mounting cylinder 131 relative to the bracket body 110 while ensuring that the bracket body 110 and the elastic buffer member 130 are axially limited around the mounting cylinder 131. By abutting the axial buffer surface 135 of the motor buffer portion 133 with the axial mating surface 117 of the plug mating portion 115 in the axial direction of the mounting cylinder 131, that is, by making the motor buffer portion 133 elastically deformable in the axial direction of the mounting cylinder 131; in this way, while ensuring that the holder body 110 and the elastic buffer member 130 are restrained in the axial direction of the mounting cylinder 131, elastic buffer shock absorption of the elastic buffer member 130 relative to the holder body 110 in the axial direction of the mounting cylinder 131 is achieved.

The holder assembly 100 of the electric toothbrush of the present utility model is constructed by including a holder body 110 and an elastic buffer member 130 such that the holder body 110 includes a main body 111 and a connection structure 114 which are connected to each other, a battery 400 mounting bin 112 is formed in the main body 111, the connection structure 114 has a socket fitting portion 115, the elastic buffer member 130 includes a mounting cylinder 131, a motor mounting chamber 132 is formed in the mounting cylinder 131, the mounting cylinder 131 has a motor buffer portion 133, and the motor buffer portion 133 and the socket fitting portion 115 are socket-fixed in an axial direction of the mounting cylinder 131 to connect the holder body 110 and the elastic buffer member 130. In this way, the bracket body 110 for installing the battery 400 and the elastic buffer member for installing the motor 300 are inserted and fixed in the extending direction of the motor shaft 310, so that the elastic buffer member can be ensured to elastically buffer and damp in the radial direction of the installation tube 131 relative to the bracket body 110. Meanwhile, the bracket body 110 and the elastic buffer member are integrally connected, so that the battery 400 and the motor 300 can be fixed to the bracket assembly 100 together during assembly, and the bracket assembly 100 is integrally assembled into the handle housing, so that the installation efficiency of the internal structure of the handle can be improved.

By providing the motor buffer portion 133 with the circumferential buffer surface 134 and the axial buffer surface 135, and providing the plug-fit portion 115 with the circumferential fit surface 116 and the axial fit surface 117, the circumferential fit surface 116 and the circumferential buffer surface 134 are in abutting fit in the axial direction around the mounting cylinder 131, so that the motor buffer portion 133 can be elastically deformed in the axial direction around the mounting cylinder 131 with respect to the plug-fit portion 115; the axial mating surface 117 is in abutting engagement with the axial buffer surface 135 in the axial direction of the mounting cylinder 131, so that the motor buffer portion 133 is elastically deformable with respect to the plug-in mating portion 115 in the axial direction of the mounting cylinder 131. In this way, after the elastic buffer member 130 for installing the motor 300 is fixedly connected with the bracket body 110 for installing the battery 400, elastic buffer and shock absorption can be realized in the axial direction of the motor shaft 310, the axial direction of the motor shaft 310 and the radial direction of the motor shaft 310, multi-dimensional shock absorption of the elastic buffer member 130 relative to the bracket body 110 is realized, and the shock absorption effect of the whole bracket assembly 100 can be effectively improved.

In an embodiment, referring to fig. 1 to fig. 7, the plugging engagement portion 115 includes a plurality of plugging protrusions 118 spaced apart along a circumferential direction of the mounting cylinder 131, and a first plugging groove 119 is formed between two adjacent plugging protrusions 118; the bottom wall of the first socket 119 and the end wall of the socket projection 118 form an axial mating surface 117; the side wall of the first plugging groove 119 and the side wall of the plugging projection 118 form a circumferential mating surface 116;

the motor buffer part 133 comprises a plurality of second inserting grooves 136 which are formed on the end wall of the mounting barrel 131 facing the connecting structure 114, the plurality of second inserting grooves 136 are arranged at intervals along the circumferential direction of the mounting barrel 131, and buffer protrusions 137 are formed between two adjacent second inserting grooves 136 of the mounting barrel 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; the side wall of the second inserting groove 136 and the side wall of the buffer protrusion 137 form a circumferential buffer surface 134;

the plurality of buffer protrusions 137 are in one-to-one correspondence and are adapted to be inserted and fixed in the plurality of first inserting grooves 119; the plurality of mating projections 118 are in one-to-one correspondence and are adapted to be mated and secured to the plurality of second mating grooves 136.

In the present embodiment, it is understood that the bottom wall of the first insertion groove 119, the bottom wall of the second insertion groove 136, the end wall of the insertion projection 118, and the end wall of the buffer projection 137 all refer to the wall surface in the axial direction of the mounting barrel 131. The side wall of the first insertion groove 119, the side wall of the second insertion groove 136, the side wall of the buffer projection 137, and the side wall of the insertion projection 118 all refer to the wall surface along the circumferential direction of the mounting cylinder 131. The shapes of the insertion projection 118 and the buffer projection 137 may be various, for example, tooth-shaped, arcuate-shaped, etc., and are not particularly limited. The number of the insertion projections 118 and the buffer projections 137 may be selected and designed according to actual needs, and is not particularly limited herein. The shape and width of the plurality of inserting protrusions 118 may be the same or different, and may be selected and designed according to practical requirements, which are not particularly limited herein. So that the plurality of inserting protrusions 118 are arranged at intervals along the circumferential direction of the mounting cylinder 131, the interval between two adjacent inserting protrusions 118 may be the same or different. In order to ensure the plug-in stability of the plug-in fitting 115 and the motor buffer 133 in the circumferential direction, the spacing between adjacent plug-in projections 118 is optionally identical. A first mating groove 119 is formed between two adjacent mating projections 118.

The motor buffer portion 133 includes a plurality of second inserting grooves 136 disposed at intervals along the circumferential direction of the mounting barrel 131, and the second inserting grooves are formed in the end wall of the mounting barrel 131 facing the connection structure 114, so that the second inserting grooves are disposed facing the connection structure 114. The second mounting groove may penetrate the inner wall surface and the outer wall surface of the mounting tube 131, may penetrate only the inner wall surface or the outer wall surface of the mounting tube 131, and may not penetrate the inner wall surface and the outer wall surface of the mounting tube 131, and is not particularly limited herein. Buffer protrusions 137 are formed between two adjacent second inserting grooves 136, so that the plurality of inserting protrusions 118 of the inserting matching part 115 are in one-to-one correspondence and are adapted to be inserted and fixed in the plurality of second inserting grooves 136 of the motor buffer part 133 during installation; the buffer protrusions 137 of the motor buffer portion 133 are in one-to-one correspondence and fit to be inserted and fixed in the first inserting grooves 119 of the inserting matching portion 115. In this way, the motor buffer portion 133 and the plug-in mating portion 115 are plugged and mated with each other, so that the bracket body 110 and the elastic buffer member 130 can be firmly connected.

So that the bottom wall of the first insertion groove 119 and the end wall of the insertion projection 118 form an axial mating surface 117, the insertion mating portion 115 forms an axial mating surface 117 that is staggered 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 an axial buffer surface 135, and the motor buffer portion 133 forms an axial buffer surface 135 with alternating height in the circumferential direction of the mounting cylinder 131. The buffer protrusion 137 and the second insertion groove 136 of the motor buffer portion 133 form circumferential buffer surfaces 134 on two sidewalls of the mounting cylinder 131 in the circumferential direction, and the first insertion groove 119 and the insertion protrusion 118 of the insertion fitting portion 115 form circumferential fitting surfaces 116 on two sidewalls of the mounting cylinder 131 in the circumferential direction. In this way, when the plurality of buffer protrusions 137 of the motor buffer portion 133 are fitted into the plurality of first insertion grooves 119 of the insertion fitting portion 115, and the plurality of insertion protrusions 118 of the insertion fitting portion 115 are fitted into the plurality of second insertion grooves 136 of the motor buffer portion 133, the plurality of axial buffer surfaces 135 and the axial fitting surfaces 117 are fitted into each other, and the plurality of circumferential buffer surfaces 134 and the circumferential fitting surfaces 116 are fitted into each other in the circumferential direction of the mounting tube 131. Compared with other structures, the biting force of the motor buffer part 133 and the plug-in matching part 115 can be effectively increased, so that the connection between the motor buffer part 133 and the plug-in matching part 115 is more stable, meanwhile, the axial buffer area and the circumferential buffer area of the motor buffer part 133 and the plug-in matching part 115 are effectively increased, the buffer and shock absorption effects of the elastic buffer member 130 on the bracket body 110 are greatly improved, and the vibration and noise brought by the vibration of the motor 300 on the bracket assembly 100 are maximally eliminated.

Further, as shown in fig. 1 to 6, the mounting tube 131 further has an inner peripheral wall 138, the inner peripheral wall 138 encloses to form the motor mounting chamber 132, the plurality of buffer protrusions 137 are located on an outer peripheral wall of the inner peripheral wall 138, and the inner peripheral wall 138 is embedded in an inner periphery of the socket fitting portion 115.

In this embodiment, the mounting cylinder 131 further has an inner wall 138, and the inner wall 138 encloses to form the motor mounting cavity 132, so that the inner wall 138 can better attach to the outer wall of the motor 300, and wrap and radially damp the whole motor 300, thereby further improving the damping effect of the whole elastic buffer member 130 while ensuring the stable assembly of the motor 300 and the mounting cylinder 131. Meanwhile, by providing the inner peripheral wall 138 such that the plurality of buffer protrusions 137 are located at the outer peripheral wall of the inner peripheral wall 138, the inner peripheral wall 138 is fitted to the inner periphery of the mating portion 115, and then the outer wall surface of the inner peripheral wall 138 forms the inner wall surfaces of the plurality of second mating grooves 136. Thus, when the plurality of plugging protrusions 118 and the plurality of second plugging grooves 136 are plugged, the inner wall surface of the plugging protrusion 118 can be abutted against the outer wall surface of the inner wall 138, and the inner wall 138 can radially limit and buffer the plugging protrusion 118, so that the connection and elastic buffer effect of the motor buffer portion 133 and the plugging matching portion 115 in the radial direction are further improved.

Further, referring to fig. 1 and 7, the connection structure 114 further includes a connection ring 120 and a limiting flange 121, wherein the connection ring 120 is connected to an end of the plugging fitting portion 115 facing away from the mounting barrel 131; the limit flange 121 is connected to the inner wall surface of the connection ring 120; the inner wall 138 protrudes toward the periphery of the main body 111 to be fitted to the inner wall of the connecting ring 120 and abuts against the limit flange 121.

In the present embodiment, the connection ring 120 is used to connect the plurality of plug protrusions 118, and the end wall of the connection ring 120 adjacent to the plug protrusions 118 forms the bottom wall of the first plug groove 119. To ensure structural strength, the connecting ring 120 is optionally integrally formed with a plurality of plug-in projections 118. The height of the connector ring 120 may be selected and designed according to the strength of the connection required for the plug-in mating portion 115. The shape of the limit flange 121 may be various, for example, circular ring shape, wave shape, arc block shape, etc., and is not particularly limited herein. The limit flange 121 and the connecting ring 120 may be integrally formed or may be separately formed, which is not particularly limited herein. So that the inner wall 138 of the elastic buffer member 130 protrudes towards the peripheral edge of the main body 111 and protrudes from the buffer protrusion 137, the portion of the inner wall 138 protruding from the buffer protrusion 137 can be embedded in the connection ring 120 and adapted to the connection ring 120, so that the limiting and elastic buffer area of the elastic buffer member 130 and the bracket body 110 in the radial direction of the mounting barrel 131 can be increased, and the connection stability and elastic buffer shock absorbing effect of the elastic buffer member 130 and the bracket body 110 can be further improved. By making the inner peripheral wall 138 of the elastic buffer member 130 abut against the limiting flange 121 of the connection structure 114, on one hand, the elastic buffer member 130 and the connection structure 114 are limited in cooperation in the axial direction, and on the other hand, the limiting flange 121 can provide sufficient supporting area and supporting force for the motor 300 and the elastic buffer member 130 to ensure the assembly effect of the whole machine.

In an embodiment, as shown in fig. 1 to 6, the inner wall surface of the inner wall 138 is provided with a plurality of limiting ribs 139 extending along the axis of the mounting barrel 131, the plurality of limiting ribs 139 are disposed at intervals around the circumference of the inner wall 138, and the protruding height of the limiting ribs 139 is gradually reduced from the mounting barrel 131 to the main body 111 side.

In this embodiment, optionally, a plurality of stop ribs are 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 limit ribs can be the same or different. Since the motor 300 is installed in the installation cylinder 131 in the axial direction of the installation cylinder 131; by having the plurality of spacing ribs 139 each extend along the axis of the mounting barrel 131, assembly of the motor 300 within the mounting barrel 131 is facilitated. The protruding height of the limiting ribs 139 is gradually reduced from the mounting barrel 131 to the main body 111, so that on one hand, the motor 300 is more smoothly mounted in the mounting barrel 131, and on the other hand, the friction force between the motor 300 and the inner wall surface of the mounting barrel 131 can be effectively increased, so that the assembly between the motor 300 and the mounting barrel 131 is more stable, and the motor 300 can be effectively prevented from rotating around the axis of the mounting barrel 131. Meanwhile, since the outer circumferential wall of the motor 300 is in contact with the plurality of limit ribs 139, there is a certain gap between the outer circumferential wall of the motor 300 and the inner wall surface of the inner wall 138, and thus, the shock transmitted from the motor 300 to the mounting cylinder 131 can be further reduced to improve the buffering and damping effects of the entire elastic buffering member 130.

In an embodiment, referring again to fig. 1 to 6, the inner peripheral wall of the inner peripheral wall 138 is provided with a circumferential limit portion 140 for limiting the rotation of the motor 300 about its axis. The circumferential limiting portion 140 may be a limiting protrusion or a positioning groove. Only one circumferential limiting portion 140 may be provided, or a plurality of circumferential limiting portions 140 may be provided at intervals around the circumference of the inner peripheral wall 138, and then the plurality of circumferential limiting portions 140 may be all limiting protrusions or positioning grooves, or may be partially limiting protrusions, or may be partially limiting positioning grooves, which is not particularly limited herein. The circumferential limiting portion 140 is provided on the inner circumferential wall of the inner circumferential wall 138, and the motor 300 mounting seat is provided with a circumferential mating portion corresponding to the circumferential limiting portion 140. By providing the circumferential limit portion 140 on the inner circumferential wall of the inner circumferential wall 138, after the motor 300 is mounted in the mounting tube 131, the motor 300 is restricted from rotating about its axis by the engagement of the circumferential limit portion 140 with the circumferential engagement portion of the mounting seat of the motor 300.

In one embodiment, as shown in fig. 1 to 3, at least a portion of the buffer projection 137 has a width in the circumferential direction of the mounting cylinder 131 that is larger than the width of the insertion projection 118 adjacent thereto in the circumferential direction of the connection ring 120.

In this embodiment, it is understood that the buffer protrusion 137 is elastically deformable and mainly plays a role of elastic buffer, and the insertion protrusion 118 is made of hard material and mainly plays a role of support. By making the width of at least part of the buffer protrusions 137 in the circumferential direction of the mounting cylinder 131 larger 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 cannot be recovered due to excessive deformation when receiving a large impact force, the service life of the whole bracket assembly 100 can be prolonged, and the product quality can be ensured.

In one embodiment, referring to fig. 1 to 7, the connection structure 114 is connected to one end of the main body 111; the width of the buffer projection 137 in the circumferential direction of the mounting cylinder 131 is gradually reduced toward the main body portion 111; the insertion projection 118 is provided with a width in the circumferential direction of the mounting tube 131 gradually decreasing away from the main body portion 111.

In this embodiment, the buffer protrusions 137 are gradually reduced toward the main body 111 in the width of the mounting tube 131, and the width of the plug protrusions 118 is reduced away from the main body 111, that is, the buffer protrusions 137 and the plug protrusions 118 are tapered structures with wide root portions and narrow top portions. Thus, on the one hand, guiding is provided for plugging the two, so that plugging cooperation between the plurality of buffer protrusions 137 and the first plugging grooves 119 and between the plurality of plugging protrusions 118 and the second plugging grooves 136 is facilitated; on the other hand, the connection strength of the buffer projection 137 on the mounting cylinder 131 and the connection strength of the socket projection 118 on the connection ring 120 can be ensured, and breakage of the buffer projection 137 and the socket projection 118 due to excessive vibration or long-term use can be avoided.

Further, in the circumferential direction of the connection ring 120, the width of the end face of the buffer projection 137 facing the main body portion 111 is greater than half the maximum width of the buffer projection 137, and the width of the end face of the insertion projection 118 facing away from the main body portion 111 is greater than half the maximum width of the insertion projection 118.

In the present embodiment, it is understood that the end surface of the buffer protrusion 137 facing the main body 111 is an axial buffer surface 135, and the end surface of the plug protrusion 118 facing away from the main body 111 is an axial mating surface 117. If the width of the end face of the buffer protrusion 137 facing the main body 111 is smaller than half of the maximum width of the buffer protrusion 137, the width of the end face of the plug protrusion 118 facing away from the main body 111 is smaller than half of the maximum width of the plug protrusion 118, so that the widths of the axial buffer surface 135 and the axial mating surface 117 are too small, the contact areas of the two are too small, so that the ends of the plug protrusion 118 and the buffer protrusion 137 are easy to deform, which is not beneficial for the support body 110 and the elastic buffer member 130 to bear too large impact force in the axial direction of the mounting cylinder 131. By making the width of the buffer projection 137 toward the end face of the main body portion 111 greater than half of the maximum width of the buffer projection 137, the width of the end face of the plug projection 118 facing away from the main body portion 111 is greater than half of the maximum width of the plug projection 118, so that the fitting area of the buffer projection 137 and the plug projection 118 in the axial direction of the mounting cylinder 131 is sufficiently large, the ends of the buffer projection 137 and the plug projection 118 are not easy to deform, so that the impact force that the bracket body 110 and the elastic buffer member 130 can bear in the axial direction of the mounting cylinder 131 is greater, and the buffer and shock absorption effect of the whole bracket assembly 100 in the axial direction of the mounting cylinder 131 is better.

In an embodiment, as shown in fig. 1 to 3, 5 to 7, 9 and 10, the elastic buffer member 130 further includes an elastic guide 150 connected to the mounting cylinder 131, and the elastic guide 150 extends toward the main body 111 along the axial direction of the mounting cylinder 131; the elastic guide 150 is partially embedded and protrudes from the outer peripheral wall of the main body 111, and the outer wall surface of the elastic guide 150 is provided with a buffering convex hull 151.

In this embodiment, in order to ensure the connection strength, the elastic guide 150 is optionally integrally formed with the mounting barrel 131, and the buffering convex hull 151 is integrally formed with the elastic guide 150. The number of the elastic guide 150 may be one, two, or more than two. When the number of the elastic guide 150 is plural, the plural elastic guide 150 may be arranged at intervals along the circumferential direction of the mounting barrel 131. The number of the buffer protrusions 151 may be one or a plurality of buffer protrusions spaced along the length of the elastic guide 150. So that the elastic conducting bar 150 is partially embedded and protrudes out of the outer peripheral wall of the main body 111, the suspension of the elastic conducting bar 150 can be avoided, and the connection stability of the elastic conducting bar 150 and the main body 111 can be ensured. By making the elastic guide bar 150 protrude out of the outer peripheral wall of the main body portion 111, the outer wall surface of the elastic guide bar 150 is provided with the buffering convex hull 151, when the bracket assembly 100 is mounted in the housing of the brush handle, the whole bracket assembly 100 is in contact with the housing of the brush handle through the buffering convex hull 151, so that the bracket body 110 and the housing of the brush handle can be effectively buffered, and vibration transmitted to the brush handle by the whole bracket assembly 100 is further reduced.

Further, at least two elastic conducting bars 150 are circumferentially spaced apart from the mounting cylinder 131, at least two buffering convex hulls 151 are circumferentially spaced apart from the elastic conducting bars 150 in the length extension direction, and the buffering convex hulls 151 are circumferentially arranged around the outer circumferential wall of the elastic conducting bars 150 around the axis of the mounting cylinder 131.

In this embodiment, at least two elastic guide strips 150 are disposed at intervals in the circumferential direction of the mounting barrel 131, so that both sides of the mounting barrel 131 and the bracket body 110 in the circumferential direction can be elastically abutted to the handle housing through the buffering convex hulls 151, thereby ensuring that the buffering stress between the whole bracket assembly 100 and the handle housing is uniform, and improving the overall buffering and damping effects. By having the elastic guide 150 provided with at least two buffering protrusions 151 spaced apart in the length extension direction thereof, the elastic buffering area and buffering effect between the holder assembly 100 and the handle housing can be further increased. So that the buffer convex hulls 151 are disposed around the outer circumferential wall of the elastic guide 150 around the axis of the mounting cylinder 131, i.e., the outer wall surfaces of the buffer convex hulls 151 each protrude beyond the circumferential side wall of the corresponding elastic guide 150. So, when the guide slot of elastic conducting bar 150 and brush holder casing cooperates, the circumference side of elastic conducting bar 150 all passes through buffering convex closure 151 and the inner wall face butt cooperation of guide slot, realizes the buffering shock attenuation of support body 110 in its radial direction and circumference, promotes whole shock attenuation effect.

In an embodiment, referring to fig. 1 to 3, fig. 5 to 7, fig. 9 and fig. 10 again, the elastic conductive strip 150 is formed with an embedded groove 152 between two adjacent buffer convex hulls 151, and an outer peripheral wall of the main body 111 is provided with an embedded protrusion 113 adapted to the embedded groove 152. Thus, the connection between the elastic guide 150 and the main body 111 is more stable and reliable while the buffering and damping effects are ensured. Alternatively, the resilient guide strip 150 is integrally injection molded with the body portion 111.

Further, as shown in fig. 1, 4, 5 and 6, the elastic buffer member 130 further includes 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 at intervals in the axial direction of the mounting cylinder 131;

the first enclosing part 161 and the second enclosing part 162 extend along 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 embedded in the main body part 111;

at least one of the first enclosing part 161 and the second enclosing part 162 is connected to the plurality of elastic guide bars 150.

In the present embodiment, in order to secure structural strength, the first enclosing portion 161, the second enclosing portion 162, and the connecting arm 163 are optionally integrally formed with the mounting cylinder 131. In order to facilitate the assembly and disassembly of the battery 400, the first enclosure portion 161 and the second enclosure portion 162 are specifically provided in a semi-enclosed ring structure. The connection arm 163 extends along the axis of the mounting cylinder 131 to connect the middle portions of the first and second enclosing portions 161 and 162. At least one of the first enclosing part 161 and the second enclosing part 162 is connected to the plurality of elastic conducting bars 150, so that a certain support can be provided for the plurality of elastic conducting bars 150 on one hand, and the whole structure of the elastic buffer member 130 can be more compact and stable on the other hand. Through making first enclosing portion 161, second enclosing portion 162 and linking arm 163, make first enclosing portion 161, second enclosing portion 162 and linking arm 163 all inlay in main part 111, so, on the one hand can effectively increase the connection area between whole elastic buffer member 130 and main part 111, realize the multi-angle between elastic buffer member 130 and main part 111 and connect, and then guarantee the connection effect between them, on the other hand, elastic buffer member 130 passes through the connection structure 114 elastic buffer fit of mounting tube 131 and support body 110, elastic buffer member 130 passes through first enclosing portion 161, second enclosing portion 162, linking arm 163 and the elastic buffer fit of main part 111 of support body 110, can further increase the elastic buffer connection area between whole elastic buffer member 130 and support body 110, and then strengthen the holistic buffering shock attenuation effect of electric toothbrush's support assembly 100.

Further, the bracket body 110 is integrally injection-molded with the elastic buffer member 130. Specifically, the elastic buffer member 130 is injection-coupled to the hard bracket body 110 using a two-shot injection molding process. Through making support body 110 and the integrative injection moulding of elastic buffer member 130, can guarantee the connection accuracy between support body 110 and the elastic buffer member 130, and then improve holistic joint strength to realize holistic buffering shock attenuation effect more effectively.

The present utility model also proposes an electric toothbrush, referring to fig. 8 to 10, the electric toothbrush comprises a handle assembly 10, the handle assembly 10 comprises a housing, a motor 300 installed in the housing, a battery 400 and a bracket assembly 100 of the electric toothbrush, the bracket assembly 100 of the electric toothbrush has a specific structure that the lower end of the motor 300 is installed in a motor installation cavity 132 of the bracket assembly 100 of the electric toothbrush according to the above-mentioned embodiment; the battery 400 is mounted in the battery 400 mounting compartment 112 of the bracket assembly 100 of the electric toothbrush; because the electric toothbrush adopts all the technical schemes of all the embodiments, the electric toothbrush has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted here. The specific structure of the motor 300 and the battery 400 can be designed with reference to the prior art, and is not particularly limited herein. Specifically, the handle assembly 10 further includes a control assembly through which the motor 300 is electrically connected to the battery 400. The electric toothbrush further includes a head assembly 20, the head assembly 20 being removably coupled to the motor shaft 310 of the handle assembly 10. The specific structure of the brush head assembly 20 and the detachable connection manner of the brush head assembly 20 and the motor shaft 310 can refer to the existing design, and will not be described herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (15)

1. A rack assembly for an electric toothbrush, comprising:

the bracket comprises a bracket body, a connecting device and a connecting device, wherein the bracket body comprises a main body part and a connecting structure which are connected with each other, a battery mounting bin is formed in the main body part, and the connecting structure is provided with an inserting matching part; and

the elastic buffer component comprises a mounting cylinder, a motor mounting cavity is formed in the mounting cylinder, and the mounting cylinder is provided with a motor buffer part; the motor buffer part and the plug-in matching part are fixedly plugged in the axial direction of the mounting cylinder so as to connect the bracket body and the elastic buffer member; wherein,,

the motor buffer part is provided with a circumferential buffer surface and an axial buffer surface; the plug-in matching part is provided with a circumferential matching surface and an axial matching surface, and the circumferential matching surface is in abutting fit with the circumferential buffer surface in the axial direction around the mounting cylinder; the axial matching surface is in abutting fit with the axial buffer surface in the axial direction of the mounting cylinder.

2. The holder assembly of the electric toothbrush according to claim 1, wherein the socket fitting portion includes a plurality of socket projections arranged at intervals along the circumferential direction of the mounting cylinder, and a first socket groove is formed between two adjacent socket projections; the bottom wall of the first inserting groove and the end wall of the inserting protrusion form the axial matching surface; the side wall of the first inserting groove and the side wall of the inserting protrusion form the circumferential matching surface;

the motor buffer part comprises a plurality of second inserting grooves which are formed in the end wall of the mounting cylinder facing the connecting structure, the second inserting grooves are arranged at intervals along the circumferential direction of the mounting cylinder, and buffer bulges are formed between two adjacent second inserting grooves of the mounting cylinder; the bottom wall of the second inserting groove and the end wall of the buffer bulge form the axial buffer surface; the side wall of the second inserting groove and the side wall of the buffer bulge form the circumferential buffer surface;

the buffer bulges are in one-to-one correspondence and are adapted to be inserted and fixed in the first inserting grooves; the plugging protrusions are in one-to-one correspondence and are adapted to be plugged and fixed in the second plugging grooves.

3. The holder assembly of claim 2, wherein the mounting barrel further has an inner peripheral wall circumscribing the motor mounting cavity, a plurality of the buffer projections being located on an outer peripheral wall of the inner peripheral wall, the inner peripheral wall being embedded in an inner periphery of the socket fitting.

4. The powered toothbrush holder assembly of claim 3, wherein said attachment structure further includes an attachment ring and a stop flange, said attachment ring being attached to an end of said socket fitting facing away from said mounting barrel; the limit flange is connected to the inner wall surface of the connecting ring; the inner peripheral wall protrudes towards the periphery of the main body part to be embedded in the inner wall surface of the connecting ring and is abutted to the limit flange.

5. A holder assembly for an electric toothbrush according to claim 3 wherein the inner wall surface of the inner wall is provided with a plurality of spacing ribs extending along the axis of the mounting cylinder, the plurality of spacing ribs being disposed at intervals around the circumference of the inner wall, the projection height of the spacing ribs being gradually reduced from the mounting cylinder toward the main body portion side.

6. A holder assembly for an electric toothbrush according to claim 3 wherein the inner peripheral wall of the inner peripheral wall is provided with a circumferential limit stop for limiting rotation of the motor about its axis.

7. The rack assembly of an electric toothbrush according to any one of claims 2 to 6 wherein at least a portion of the buffer projections have a width in the circumferential direction of the mounting cylinder that is greater than the width in the circumferential direction of the mounting cylinder of the mating projections adjacent thereto.

8. The powered toothbrush stand assembly of any one of claims 2 to 6, wherein the connection structure is connected to one end of the main body portion; the width of the buffer bulge in the circumferential direction of the mounting cylinder is gradually reduced towards the main body part; the width of the inserting protrusion in the circumferential direction of the mounting cylinder is gradually reduced away from the main body part.

9. The holder assembly of the electric toothbrush according to claim 8, wherein a width of an end surface of the buffer projection facing the main body portion in a circumferential direction of the mounting cylinder is greater than half a maximum width of the buffer projection, and a width of an end surface of the insertion projection facing away from the main body portion is greater than half a maximum width of the insertion projection.

10. The bracket assembly of the electric toothbrush according to any one of claims 1 to 6, wherein the elastic buffer member further comprises an elastic guide connected to the mounting cylinder, the elastic guide extending toward the main body portion in an axial direction of the mounting cylinder; the elastic guide strip part is embedded and protrudes out of the outer peripheral wall of the main body part, and a buffering convex hull is arranged on the outer wall surface of the elastic guide strip.

11. The power toothbrush holder assembly of claim 10, wherein said mounting cylinder is circumferentially spaced apart with at least two of said resilient conductive strips, said resilient conductive strips being longitudinally spaced apart with at least two of said buffer projections, said buffer projections being disposed about an axis of said mounting cylinder about an outer peripheral wall of said resilient conductive strips.

12. The holder assembly of claim 11, wherein the elastic guide bar is formed with an insertion groove between adjacent two of the buffer protrusions, and an outer circumferential wall of the main body portion is provided with an insertion protrusion adapted to the insertion groove.

13. The holder assembly for an electric toothbrush according to claim 11 wherein the elastic buffer member further comprises first enclosing portions, second enclosing portions, and connecting arms connecting the first enclosing portions and the second enclosing portions, which are arranged at intervals in an axial direction of the mounting cylinder;

the first enclosing part and the second enclosing part extend along the circumferential direction of the main body part, and the first enclosing part, the second enclosing part and the connecting arm are embedded in the main body part;

at least one of the first enclosing part and the second enclosing part is connected with a plurality of elastic conducting bars.

14. The powered toothbrush holder assembly of claim 1, wherein said holder body is integrally injection molded with said resilient cushioning member.

15. An electric toothbrush comprising a handle assembly including a housing, a motor mounted within the housing, a battery and a bracket assembly of the electric toothbrush of any one of claims 1 to 14; the lower end of the motor is arranged in a motor mounting cavity of the bracket component of the electric toothbrush; the battery is mounted in a battery mounting bin of a bracket assembly of the electric toothbrush.