Support assembly of electric toothbrush and electric toothbrush

Abstract

In the bracket assembly and electric toothbrush disclosed in an embodiment of the present invention, the bracket assembly of the electric toothbrush comprises a bracket body and an elastic cushioning member; the bracket body comprises a main body portion and a connecting structure that are interconnected, a battery mounting box is formed inside the main body portion, and the connecting structure comprises an insertion connection matching portion; the elastic cushioning member comprises a mounting tube, a motor mounting cavity is formed inside the mounting tube, and the mounting tube comprises a motor cushioning portion; the motor cushioning portion and the insertion connection matching portion are inserted and connected in the axial direction of the mounting tube and fixed; the motor cushioning portion comprises a circumferential cushioning surface and an axial cushioning surface; the insertion connection matching portion comprises a circumferential matching surface and an axial matching surface, and the circumferential matching surface and the circumferential cushioning surface are connected and matched in the axial direction surrounding the mounting tube; and the axial matching surface and the axial cushioning surface are connected and matched in the axial direction of the mounting tube.

Description

Technology Field

[0001] The present invention relates to the field of electric toothbrush technology, and in particular to a bracket assembly for an electric toothbrush and an electric toothbrush. Background Technology

[0002] As people's living standards continue to improve, the usage and penetration rates of electric toothbrushes are also steadily increasing. The brush handle assembly of an electric toothbrush includes a case, a motor, a battery, and a mounting bracket capable of securing the motor and battery inside the case. During use, the motor shaft extending out of the case is connected to the brush head, the battery supplies power to the motor, and the brush head can vibrate through the motor's drive shaft.

[0003] To improve the assembly efficiency of the internal structure of the brush handle, current products generally connect the motor bracket and the battery bracket as a whole, making it convenient to secure the battery and motor to the mounting bracket, and allowing the entire assembly to extend into the case via the mounting bracket. However, since the motor's high-frequency vibrations are directly transmitted to the mounting bracket, a strong vibration sensation may be felt throughout the entire brush handle of the electric toothbrush.

[0004] In conventional technology, to reduce vibration, a rubber sleeve is installed on the outer surface of the motor, and the motor is mounted inside the motor bracket through the rubber sleeve. As a result, the motor sleeve only absorbs vibrations of the motor in the radial direction of the motor sleeve and cannot absorb vibrations of the motor felt in the axial direction, which leads to a problem of reduced overall shock absorption effect.

[0005] The foregoing description serves only to assist in understanding the technical method of the present invention and does not imply that the foregoing description constitutes prior art. Prior art literature

[65535] Chinese Published Patent Application CN 109980831 A Published Patent 10-2022-0072840 The problem to be solved

[0006] Based on the aforementioned problems, the present invention aims to solve the technical problem of reduced intense vibration sensation and shock absorption effect of an electric toothbrush by presenting a bracket assembly for an electric toothbrush. means of solving the problem

[0007] To realize the above-mentioned purpose, the bracket assembly of an electric toothbrush presented in the present invention comprises a bracket body and an elastic cushioning member, and

[0008] The above bracket body includes an interconnected main body and a connection structure, a battery mounting box is formed inside the main body, and the connection structure is provided with an insertion connection matching part;

[0009] The above elastic cushioning member includes a mounting tube, a motor mounting cavity is formed inside the mounting tube, and the mounting tube is provided with a motor cushioning part; the motor cushioning part and the insertion connection matching part are inserted and connected in the axial direction of the mounting tube to be fixed, thereby connecting the bracket body and the elastic cushioning member; and herein,

[0010] The motor damping member comprises a circumferential damping surface and an axial damping surface; the insertion connection matching member comprises a circumferential matching surface and an axial matching surface, wherein the circumferential matching surface and the circumferential damping surface are connected and matched in an axial direction surrounding the mounting tube; and the axial matching surface and the axial damping surface are connected and matched in the axial direction of the mounting tube.

[0011] In one embodiment, the insertion connection matching portion includes a plurality of insertion connection protrusions spaced apart along the circumferential direction of the mounting tube, and a first insertion connection groove is formed between two adjacent insertion connection protrusions; an axial matching surface is formed on the bottom wall of the first insertion connection groove and the end wall of the insertion connection protrusion; and a circumferential matching surface is formed on the side wall of the first insertion connection groove and the side wall of the insertion connection protrusion.

[0012] The motor damper includes a plurality of second insertion connection grooves installed on the end wall of the mounting tube facing the connection structure, wherein the plurality of second insertion connection grooves are spaced apart along the circumferential direction of the mounting tube, and the mounting tube forms a damping projection between two adjacent second insertion connection grooves; the axial damping surface is formed on the bottom wall of the second insertion connection groove and the end wall of the damping projection; and the circumferential damping surface is formed on the side wall of the second insertion connection groove and the side wall of the damping projection;

[0013] A plurality of the above-mentioned buffer protrusions correspond one by one and are inserted and connected to a plurality of the above-mentioned first insertion connection grooves and fixed; and a plurality of the above-mentioned insertion connection protrusions correspond one by one and are inserted and connected to a plurality of the above-mentioned second insertion connection grooves and fixed.

[0014] In one embodiment, the mounting tube further comprises an inner circumference wall, and the motor mounting cavity is formed surrounding the inner circumference wall, a plurality of the cushioning protrusions are located on the outer circumference wall of the inner circumference wall, and the inner circumference wall is embedded in the inner circumference of the insertion connection matching part.

[0015] In one embodiment, the connection structure further comprises a connection ring and a position limiting flange, wherein the connection ring is connected to one end of the insertion connection matching portion facing away from the mounting tube; the position limiting flange is connected to the inner wall surface of the connection ring; and the buffer projection protrudes from the edge of the inner perimeter wall facing the main body portion and can be installed embedded in the inner wall surface of the connection ring while being connected to the position limiting flange.

[0016] In one embodiment, a plurality of position-limiting protruding ribs extending along the axis of the mounting tube are installed on the inner wall surface of the inner perimeter wall, and the plurality of position-limiting protruding ribs are spaced apart and surround the circumferential direction of the inner perimeter wall, and the protruding height of the position-limiting protruding ribs is installed in a form that gradually decreases from the mounting tube toward one side of the main body part.

[0017] In one embodiment, a circumferential position limiting member is installed on the inner wall of the inner perimeter wall to limit the rotation of the motor around its axis.

[0018] In one embodiment, the width of at least some of the buffer protrusions in the circumferential direction of the mounting tube is greater than the width of the insertion connecting protrusions adjacent thereto in the circumferential direction of the connecting ring.

[0019] In one embodiment, the connection structure is connected to one end of the main body; the width of the cushioning projection is installed in a shape that gradually decreases toward one side of the main body in the circumferential direction of the mounting tube; and the width of the insertion connection projection is installed in a shape that gradually decreases toward one side of the main body in the circumferential direction of the mounting tube.

[0020] In one embodiment, in the circumferential direction of the connecting ring, the width of the cross-section of the cushioning projection facing the main body is greater than half the maximum width of the cushioning projection, and the width of the cross-section of the insertion connecting projection facing away from the main body is greater than half the maximum width of the insertion connecting projection.

[0021] In one embodiment, the elastic cushioning member further includes an elastic guide strip connected to the mounting tube, and the elastic guide strip is installed extending toward the main body portion along the axial direction of the mounting tube; the elastic guide strip is installed protruding from the outer wall of the main body portion while a portion of it is installed embedded, and a cushioning bump is installed on the outer wall surface of the elastic guide strip.

[0022] In one embodiment, at least two of the elastic guide strips are spaced apart in the circumferential direction of the mounting tube, and at least two of the buffer bumps are spaced apart in the direction in which the length extends on the elastic guide strips, and the buffer bumps surrounding the axis of the mounting tube are installed surrounding the outer wall of the elastic guide strips.

[0023] In one embodiment, the elastic guide strip forms a fitting groove between two adjacent buffer bumps, and a fitting projection matching the fitting groove is installed on the outer wall of the main body portion.

[0024] In one embodiment, the elastic cushioning member further comprises a first encirclement, a second encirclement, spaced apart from the axial direction of the mounting tube, and a connecting arm connected to the first encirclement and the second encirclement;

[0025] The first encirclement portion and the second encirclement portion extend along the circumferential direction of the main body portion, and the first encirclement portion, the second encirclement portion, and the connecting arm are embedded and installed in the main body portion;

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

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

[0028] In an electric toothbrush further presented in the present invention, the brush handle assembly comprises a case, a motor mounted inside the case, a battery, and a bracket assembly of the electric toothbrush described above; the lower end of the motor is mounted inside a motor mounting cavity in the bracket assembly of the electric toothbrush; and the battery is mounted inside a battery mounting box in the bracket assembly of the electric toothbrush. Effects of the invention

[0029] In the present invention, the bracket assembly of an electric toothbrush comprises a bracket body and an elastic cushioning member. The bracket body includes an interconnected main body and a connecting structure, a battery mounting compartment is formed inside the main body, and the connecting structure is provided with an insertion connection matching part. The elastic cushioning member includes a mounting tube, a motor mounting cavity is formed inside the mounting tube, and the mounting tube is provided with a motor cushioning part. The motor cushioning part and the insertion connection matching part are inserted and connected in the axial direction of the mounting tube to be fixed, thereby connecting the bracket body and the elastic cushioning member. In this manner, the bracket body capable of mounting a battery and the elastic cushioning member capable of mounting a motor are inserted and connected in the direction in which the motor axis extends, so that the elastic cushioning member facing the bracket body is elastically cushioned in the radial direction of the mounting tube, thereby ensuring shock absorption. At the same time, the bracket body and the elastic cushioning member are connected to form a whole, so that when assembled, the battery and the motor can be fixed together up to the bracket assembly, and the entire bracket assembly is assembled inside the brush handle case, thereby improving the mounting efficiency of the internal structure of the brush handle.

[0030] By providing a motor damping member with a circumferential damping surface and an axial damping surface, and an insertion connection matching member with a circumferential matching surface and an axial matching surface, the circumferential matching surface and the circumferential damping surface are connected and matched in the axial direction surrounding the mounting tube, so that the motor damping member is elastically deformed in the axial direction surrounding the mounting tube in opposition to the insertion connection matching member; and when the axial matching surface and the axial damping surface are connected and matched in the axial direction of the mounting tube, the motor damping member is elastically deformed in the axial direction of the mounting tube in opposition to the insertion connection matching member. In this manner, the elastic damping member capable of mounting a motor is fixedly connected to a bracket body capable of mounting a battery, and then can be elastically dampened and shock-mitigated in the axial direction of the motor shaft, the axial direction surrounding the motor shaft, and the radial direction of the motor shaft. Thus, the elastic damping member can realize multidimensional shock absorption by facing the bracket body, thereby effectively improving the shock-mitigation effect of the entire bracket assembly. Brief explanation of the drawing

[0031] In order to more clearly explain the technical methods of the embodiments in the present invention, the drawings to be used in the description of the embodiments are briefly introduced below, and it can be understood from the description below that the drawings are merely some embodiments of the present invention. A person skilled in the art can obtain other drawings based on the presented drawings under the premise that no creative labor was performed. FIG. 1 is a schematic diagram of a structure showing one embodiment of a bracket assembly in an electric toothbrush of the present invention. Figure 2 is a schematic diagram of the structure of the bracket assembly of Figure 1 viewed from a different angle. Figure 3 is a transverse cross-sectional view of the bracket assembly shown in Figure 2. Figure 4 is a longitudinal cross-sectional view of the bracket assembly shown in Figure 1. FIG. 5 is a schematic diagram of a structure showing one embodiment of an elastic cushioning member of the present invention. Figure 6 is a schematic diagram of the structure of the elastic cushioning member of Figure 5 viewed from a different angle. FIG. 7 is a schematic diagram of a structure showing one embodiment of a bracket body in the present invention. FIG. 8 is a schematic diagram of a structure showing one embodiment of an electric toothbrush in the present invention. FIG. 9 is a cross-sectional view showing the angle of the brush handle assembly in the electric toothbrush of FIG. 8. Figure 10 is a magnified view of point A in Figure 9. Specific details for implementing the invention

[0032] The following describes the technical methods of the embodiments of the present invention in detail and completely by combining the drawings of the embodiments. The described embodiments are merely partial embodiments of the present invention and do not constitute the entirety of the invention. All other embodiments obtained under the premise that a person skilled in the art has not performed creative labor based on the embodiments of the present invention fall within the scope of protection of the present invention. Furthermore, technical methods between each embodiment may be combined, but this must be based on the premise that a person skilled in the art can realize them. If the combination of technical methods results in mutual contradiction or cannot be realized, such combination of technical methods should be deemed not to exist and not to be included within the scope of protection required by the present invention.

[0033] In an embodiment of the present invention, when all directional indications (e.g., up, down, left, right, front, back...) are present, these directional indications are used only to describe the relative positional relationship, operating situation, etc., between each part in a specific state, and if the specific state changes, the directional indications are also changed accordingly.

[0034] Furthermore, in the embodiments of the present invention, if descriptions such as "first," "second," etc. are used, they are used merely for descriptive purposes and should not be understood as indicating or implying relative importance or implying a quantity of technical features. Accordingly, unless otherwise specified, the features of "first" and "second" explicitly or implicitly include one or more features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel plans, and in the case of "A and / or B," it means including plan A or plan B, or including a plan that satisfies both A and B simultaneously.

[0035] The present invention provides a bracket assembly for an electric toothbrush.

[0036] In an embodiment of the present invention, referring to FIGS. 1 to 4, the bracket assembly (100) of the electric toothbrush presented in the present invention includes a bracket body (110) and an elastic cushioning member (130). The bracket body (110) includes an interconnected main body portion (111) and a connection structure (114), and a battery (400) mounting box (112) is formed inside the main body portion (111), and the connection structure (114) is provided with an insertion connection matching portion (115). The elastic cushioning member (130) includes a mounting tube (131), and a motor mounting cavity (132) is formed inside the mounting tube (131), and the mounting tube (131) is provided with a motor cushioning portion (133); The motor buffer part (133) and the insertion connection matching part (115) can be connected to the bracket body (110) and the elastic buffer member (130) by being inserted and fixed in the axial direction of the mounting tube (131).

[0037] The motor buffer section (133) is provided with a circumferential buffer surface (134) and an axial buffer surface (135); the insertion connection matching section (115) is provided with a circumferential matching surface (116) and an axial matching surface (117), and the circumferential matching surface (116) and the circumferential buffer surface (134) are connected and matched in the axial direction surrounding the mounting tube (131); and the axial matching surface (117) and the axial buffer surface (135) are connected and matched in the axial direction of the mounting tube (131).

[0038] In this embodiment, the bracket body (110) may specifically be manufactured from plastic or other hard materials. The elastic cushioning member (130) may be manufactured entirely from an elastic material such as silicone or rubber. The main body portion (111) and the connecting structure (114) of the bracket body (110) may be installed by integral molding or by segmented molding, and optionally, the main body portion (111) and the connecting structure (114) may be installed by integral molding to improve structural strength. The connecting structure (114) may be connected to the end of the main body portion (111), or connected to a position near the middle or end of the main body portion (111), and may be selected and designed according to actual needs. Optionally, the connecting structure (114) is connected to the end of the main body portion (111) to improve the compactness of the structure.

[0039] A battery (400) mounting box (112) is formed in the main body (111), and generally, the battery (400) is mounted vertically inside the brush handle so that the diameter of the electric toothbrush brush handle can be reduced. The main body (111) and the battery (400) mounting box (112) together have a long strip shape that extends in the longitudinal direction. The shape of the main body (111) is varied; for example, the main body (111) may be a circular cylinder, a square cylinder, or a frame-shaped structure with half enclosed, and as long as the battery (400) mounting box (112) is formed so that the battery (400) can be fixed and mounted, the specific structure and shape of the main body (111) are not specifically limited here.

[0040] For better understanding, the motor mounting cavity (132) is used to mount the motor (300) by matching it to the bottom of the motor (300), and since the cross-sectional shape of the motor mounting cavity (132) can be appropriately adjusted according to the cross-sectional shape of the motor (300) selected by the electric toothbrush, it is not specifically limited here. Accordingly, the axis of the mounting tube (131) coincides with the extension direction of the motor axis (310) of the motor (300). The external contour shape of the cross-section of the mounting tube (131) can be installed as a circle, ellipse, square, etc. Since the cross-sectional shape of the outer case of the brush handle in the electric toothbrush is generally circular, in order for the mounting tube (131) to be mounted more effectively by matching it inside the outer case of the brush handle, preferably, the external contour shape of the cross-section of the mounting tube (131) is installed and appears as a circle.

[0041] The connection structure (114) of the bracket body (110) is provided with an insertion connection matching part (115), and this connection part is made of a hard material. The mounting tube (131) of the elastic cushioning member (130) is provided with a motor cushioning part (133), and this motor cushioning part (133) is made of an elastic material. The motor cushioning part (133) and the insertion connection matching part (115) are inserted and connected in the axial direction of the mounting tube (131) and fixed. In order to increase the connection stability of the two, the two are prevented from separating from each other in the radial direction of the mounting tube (131), and the matching surfaces of the motor cushioning part (133) and the insertion connection matching part (115) can be joined to each other or connected to the motor cushioning part (133) and the insertion connection matching part (115) through a secondary injection molding process. By matching the insertion connection matching part (115) and the motor buffer part (133) in the axial direction of the mounting tube (131), the bracket body (110) facing the elastic buffer member (130) can rotate along the axis surrounding the mounting tube (131) and restrict movement along the axis of the mounting tube (131). For understanding, when the insertion connection matching part (115) and the motor buffer part (133) are matched in the axial direction of the mounting tube (131), there are two situations as follows when the motor buffer part (133) is assembled in the radial direction facing the connection part. One is that the motor buffer part (133) and the insertion connection matching part (115) have a connecting surface that is matched to each other in the radial direction; Another case is that the motor buffer (133) and the insertion connection matching part (115) have a connection surface that is not connected in the radial direction of the mounting tube (131), that is, one of the motor buffer (133) and the insertion connection matching part (115) penetrates in the radial direction of the mounting tube (131). In both of the above cases, the motor buffer (133) facing the insertion connection matching part (115) can be buffered in the radial direction of the mounting tube (131) to mitigate the impact.

[0042] The motor damping section (133) is provided with a circumferential damping surface (134) and an axial damping surface (135). The number of circumferential damping surfaces (134) and axial damping surfaces (135) may be one or multiple, and is not specifically limited here. The number of circumferential matching surfaces (116) corresponds to the number of circumferential damping surfaces (134), and the number of axial damping surfaces (135) corresponds to the number of axial matching surfaces (117). The axial matching surface (117), axial buffering surface (135), circumferential matching surface (116), and circumferential buffering surface (134) may be one of a flat surface, an arched surface, or a combination of a flat surface and an arched surface, and by connecting the circumferential buffering surface (134) and the circumferential matching surface (116), the elastic buffering member can achieve elastic deformation along the axis surrounding the mounting tube (131), and by connecting the axial buffering surface (135) and the axial matching surface (117), the elastic buffering member can achieve elastic deformation along the axis surrounding the mounting tube (131).

[0043] The shapes of the motor damper (133) and the insertion connection matching part (115) vary, for example, one of the motor damper (133) and the insertion connection matching part (115) is a protruding structure, and the other is a concave groove open toward the protruding structure; of course, the motor damper (133) and the insertion connection matching part (115) may be a sawtooth structure that is mutually connected and matched. The circumferential damping surface (134) of the motor damper (133) and the circumferential matching surface (116) of the insertion connection matching part (115) are matched and connected in the axial direction of the mounting tube (131), that is, the motor damper (133) is elastically deformed in the axial direction of the mounting tube (131); Accordingly, the bracket body (110) and the elastic cushioning member (130) ensure that the axial direction of the mounting tube (131) is surrounded and position-limited, while the elastic cushioning member (130) is positioned opposite the bracket body (110) and surrounds the circumferential direction of the mounting tube (131) to provide elastic cushioning and shock relief. The axial cushioning surface (135) of the motor cushioning part (133) and the axial matching surface (117) of the insertion connection matching part (115) are matched and connected along the axial direction of the mounting tube (131), that is, the motor cushioning part (133) can be elastically deformed in the axial direction of the mounting tube (131). Accordingly, while ensuring that the bracket body (110) and the elastic cushioning member (130) are positionally limited in the axial direction of the mounting tube (131), the elastic cushioning member (130) is positioned opposite the bracket body (110) and can be elastically cushioned in the axial direction of the mounting tube (131) to mitigate shock.

[0044] In the present invention, the bracket assembly (100) of the electric toothbrush comprises a bracket body (110) and an elastic cushioning member (130). The bracket body (110) includes a main body portion (111) and a connecting structure (114) that are interconnected. A battery (400) mounting box (112) is formed inside the main body portion (111). The connecting structure (114) is provided with an insertion connection matching portion (115). The elastic cushioning member (130) includes a mounting tube (131). A motor mounting cavity (132) is formed inside the mounting tube (131). The mounting tube (131) is provided with a motor cushioning portion (133). The motor cushioning portion (133) and the insertion connection matching portion (115) are inserted and connected in the axial direction of the mounting tube (131) to be fixed, thereby allowing the bracket body (110) and the elastic cushioning member (130) to be connected. In this way, a bracket body (110) capable of mounting a battery (400) and an elastic cushioning member capable of mounting a motor (300) are inserted and connected in the direction in which the motor shaft (310) extends, and an elastic cushioning member facing the bracket body (110) is elastically cushioned in the radial direction of the mounting tube (131) to ensure shock absorption. At the same time, the bracket body (110) and the elastic cushioning member are connected as a whole, so that when assembled, the battery (400) and the motor (300) can be fixed together to the bracket assembly (100), and the entire bracket assembly (100) is assembled inside the brush handle case, thereby improving the mounting efficiency of the internal structure of the brush handle.

[0045] By having the motor buffer (133) provided with a circumferential buffer surface (134) and an axial buffer surface (135), the insertion connection matching part (115) is provided with a circumferential matching surface (116) and an axial matching surface (117), and the circumferential matching surface (116) and the circumferential buffer surface (134) are connected and matched in the axial direction surrounding the mounting tube (131), so that the motor buffer (133) is elastically deformed in the axial direction of the mounting tube (131) facing the insertion connection matching part (115); and the axial matching surface (117) and the axial buffer surface (135) are connected and matched in the axial direction of the mounting tube (131), and the motor buffer (133) is elastically deformed in the axial direction of the mounting tube (131) facing the insertion connection matching part (115). In this way, the elastic cushioning member (130) capable of mounting the motor (300) is fixedly connected to the bracket body (110) capable of mounting the battery (400), and then elastically cushions and mitigates shock in the axial direction of the motor shaft (310), the axial direction surrounding the motor shaft (310), and the radial direction of the motor shaft (310). Thus, the elastic cushioning member (130) can be positioned opposite the bracket body (110) to realize multidimensional shock absorption, thereby effectively improving the shock mitigation effect of the entire bracket assembly (100).

[0046] In one embodiment, referring to FIGS. 1 to 7, the insertion connection matching portion (115) includes a plurality of insertion connection protrusions (118) spaced apart along the circumferential direction of the mounting tube (131), and a first insertion connection groove (119) is formed between two adjacent insertion connection protrusions (118); an axial matching surface (117) is formed on the bottom wall of the first insertion connection groove (119) and the end wall of the insertion connection protrusion (118); and a circumferential matching surface (116) is formed on the side wall of the first insertion connection groove (119) and the side wall of the insertion connection protrusion (118).

[0047] The motor buffer section (133) includes a plurality of second insertion connection grooves (136) installed on the end wall of a mounting tube (131) facing the connection structure (114), the plurality of second insertion connection grooves (136) are spaced apart along the circumferential direction of the mounting tube (131), and the mounting tube (131) forms a buffer projection (137) between two adjacent second insertion connection grooves (136); an axial buffer surface (135) is formed on the bottom wall of the second insertion connection groove (136) and the end wall of the buffer projection (137); and a circumferential buffer surface (134) is formed on the side wall of the second insertion connection groove (136) and the side wall of the buffer projection (137).

[0048] A plurality of buffer protrusions (137) are individually corresponding and inserted into and fixed to a plurality of first insertion connection grooves (119); and a plurality of insertion connection protrusions (118) are individually corresponding and inserted into and fixed to a plurality of second insertion connection grooves (136).

[0049] In this embodiment, to be understood, the bottom wall of the first insertion connection groove (119), the bottom wall of the second insertion connection groove (136), the end wall of the insertion connection projection (118), and the end wall of the cushioning projection (137) refer to wall surfaces along the axial direction of the mounting tube (131). The side wall of the first insertion connection groove (119), the side wall of the second insertion connection groove (136), the side wall of the cushioning projection (137), and the side wall of the insertion connection projection (118) refer to wall surfaces along the circumferential direction of the mounting tube (131). The shapes of the insertion connection projection (118) and the cushioning projection (137) can vary, such as toothed or arched plate shapes, and are not specifically limited here. The number of insertion connection projections (118) and cushioning projections (137) can be selected and designed according to actual needs and is not specifically limited here. The shape and width of the multiple insertion connection protrusions (118) may be the same or different, and may be selected and designed according to actual needs, so they are not specifically limited here. The multiple insertion connection protrusions (118) are spaced apart along the circumferential direction of the mounting tube (131), and the distance between two adjacent insertion connection protrusions (118) may be the same or different. To ensure stability when the insertion connection matching part (115) and the motor buffer part (133) are connected in the circumferential direction, the spacing between two adjacent insertion connection protrusions (118) may be the same. A first insertion connection groove (119) is formed between two adjacent insertion connection protrusions (118).

[0050] The motor buffer section (133) includes a plurality of second insertion connection grooves (136) spaced apart along the circumferential direction of the mounting tube (131), and the second mounting grooves are installed on the end wall of the mounting tube (131) facing the connection structure (114), so that the second mounting grooves are installed in an open shape toward the connection structure. The second mounting grooves may penetrate the inner and outer walls of the mounting tube (131), or only the inner or outer walls of the mounting tube (131), or may not penetrate the inner and outer walls of the mounting tube (131), so they are not specifically limited here. A buffer projection (137) is formed between two adjacent second insertion connection grooves (136); when mounted, a plurality of insertion connection projections (118) in the insertion connection matching section (115) correspond to each other and are inserted and connected to the plurality of second insertion connection grooves (136) of the motor buffer section (133) and fixed; A plurality of cushioning protrusions (137) of the motor cushioning part (133) correspond to each other and are inserted and connected to a plurality of first insertion connection grooves (119) of the insertion connection matching part (115) and fixed. In this way, the motor cushioning part (133) and the insertion connection matching part (115) are connected and matched to each other, so that the bracket body (110) and the elastic cushioning member (130) can be stably connected.

[0051] An axial matching surface (117) is formed on the bottom wall of the first insertion connection groove (119) and the end wall of the insertion connection projection (118), so that the insertion connection matching part (115) forms an axial matching surface (117) with a height intersecting in the circumferential direction of the mounting tube (131). An axial cushioning surface (135) is formed on the bottom wall of the second insertion connection groove (136) and the end wall of the cushioning projection (137), so that the motor cushioning part (133) forms an axial cushioning surface (135) with a height intersecting in the circumferential direction of the mounting tube (131). A circumferential cushioning surface (134) is formed on both side walls in the circumferential direction of the mounting tube (131) by the cushioning projection (137) and the second insertion connection groove (136) of the motor cushioning part (133), and a circumferential matching surface (116) is formed on both side walls in the circumferential direction of the mounting tube (131) by the first insertion connection groove (119) and the insertion connection projection (118) of the insertion connection matching part (115). In this way, when a plurality of cushioning protrusions (137) of the motor cushioning part (133) are matched to a plurality of first insertion connection grooves (119) of the insertion connection matching part (115), and a plurality of insertion connection protrusions (118) of the insertion connection matching part (115) are matched to a plurality of second insertion connection grooves (136) of the motor cushioning part (133), a plurality of axial cushioning surfaces (135) and axial matching surfaces (117) are matched to each other in the circumferential direction of the mounting tube (131), and a plurality of circumferential cushioning surfaces (134) and circumferential matching surfaces (116) are matched to each other.Compared to other structures, the occlusal force of the motor buffer (133) and the insertion connection matching part (115) can be effectively increased, so that the motor buffer (133) and the insertion connection matching part (115) can be connected more stably, and at the same time, the axial buffering area and the circumferential buffering area of ​​the motor buffer (133) and the insertion connection matching part (115) are effectively increased, so that the effect of the elastic buffering member (130) cushioning and shock-mitigating against the bracket body (110) is greatly improved, and the vibration and noise caused to the bracket assembly (100) by the vibration of the motor (300) can be eliminated to the maximum extent.

[0052] Furthermore, as illustrated in FIGS. 1 to 6, the mounting tube (131) further comprises an inner circumferential wall (138), and a motor mounting cavity (132) is formed surrounding the inner circumferential wall (138), and a plurality of cushioning protrusions (137) are located on the outer wall of the inner circumferential wall (138), and the inner circumferential wall (138) is embedded in the inner circumferential of the insertion connection matching part (115).

[0053] In this embodiment, the mounting tube (131) further comprises an inner circumferential wall (138), and a motor mounting cavity (132) is formed surrounding the inner circumferential wall (138), so that the inner circumferential wall (138) is better bonded to the outer circumferential wall of the motor (300), the entire motor (300) is wrapped and shock is mitigated in the radial direction, and the motor (300) and the mounting tube (131) are stably assembled, while simultaneously enhancing the shock-mitigating effect of the entire elastic cushioning member (130). At the same time, by installing the inner circumferential wall (138), a plurality of cushioning protrusions (137) are located on the outer circumferential wall of the inner circumferential wall (138), and the inner circumferential wall (138) is embedded in the inner circumferential of the insertion connection matching part (115), so that the inner wall surface of a plurality of second insertion connection grooves (136) is formed on the outer wall surface of the inner circumferential wall (138). In this way, when a plurality of insertion connecting protrusions (118) are matched and connected to a plurality of second insertion connecting grooves (136), the inner wall surface of the insertion connecting protrusion (118) can be connected to the outer wall surface of the inner perimeter wall (138), so that the inner perimeter wall (138) radially restricts and cushions the insertion connecting protrusion (118), thereby further strengthening the radial connection between the motor cushioning part (133) and the insertion connecting matching part (115) and further enhancing the elastic cushioning effect.

[0054] Furthermore, referring to FIGS. 1 and FIGS. 7, the connection structure (114) further includes a connection ring (120) and a position limiting flange (121), the connection ring (120) is connected to one end of an insertion connection matching part (115) facing the mounting tube (131); the position limiting flange (121) is connected to the inner wall surface of the connection ring (120); and a cushioning projection (137) protrudes from the edge of the inner perimeter wall (138) facing the main body part (111) and can be embedded in the inner wall surface of the connection ring (120) and connected to the position limiting flange (121).

[0055] In this embodiment, the connecting ring (120) is used to connect a plurality of insertion connecting protrusions (118), and the bottom wall of the first insertion connecting groove (119) is formed on the end wall of the connecting ring (120) near the insertion connecting protrusion (118). To ensure structural strength, the connecting ring (120) may optionally be installed by integrally molding with the plurality of insertion connecting protrusions (118). The height of the connecting ring (120) may be selected and designed according to the connection strength required in the insertion connecting matching part (115). The shape of the position limiting flange (121) may vary, such as a circular ring, a wave shape, or an arc shape, so it is not specifically limited here. The position limiting flange (121) and the connecting ring (120) may be installed by integrally molding or by segmented molding, so they are not specifically limited here. When the edge of the inner circumferential wall (138) of the elastic cushioning member (130) facing the main body (111) is installed protruding from the cushioning projection (137), and a part of the inner circumferential wall (138) protruding from the cushioning projection (137) is connected to the inside of the connecting ring (120) so that the connecting ring (120) matches each other, the positional limitation and elastic cushioning area of ​​the elastic cushioning member (130) and the bracket body (110) in the radial direction of the mounting tube (131) can be increased, and thus the connection stability of the elastic cushioning member (130) and the bracket body (110) and the effect of elastic cushioning to mitigate shock can be further improved. By connecting the inner perimeter wall (138) of the elastic cushioning member (130) to the position limiting flange (121) of the connection structure (114), the matching of the elastic cushioning member (130) and the connection structure (114) is position limited in one direction in the axial direction, and in the other direction, the position limiting flange (121) provides sufficient support area and support force to the motor (300) and the elastic cushioning member (130), thereby ensuring the assembly effect of the entire device.

[0056] In one embodiment, as shown in FIGS. 1 to 6, a plurality of position-limiting protruding ribs (139) extending along the axis of the mounting tube (131) are installed on the inner wall surface of the inner perimeter wall (138), and the plurality of position-limiting protruding ribs (139) are spaced apart and installed around the circumferential direction of the inner perimeter wall (138), and the protruding height of the position-limiting protruding ribs (139) is installed in a form that gradually decreases from the mounting tube (131) toward one side of the main body part (111).

[0057] In this embodiment, optionally, a plurality of position-limiting ribs and an inner perimeter wall (138) are integrally molded and installed. The number of position-limiting protruding ribs (139) can be selected and designed according to actual needs. The distance between two adjacent position-limiting ribs may be the same or different. The motor (300) can be mounted inside the mounting tube (131) along the axial direction of the mounting tube (131); the plurality of position-limiting protruding ribs (139) extend along the axial line of the mounting tube (131), thereby allowing the motor (300) to be assembled more conveniently inside the mounting tube (131). The protrusion height of the position-limiting protruding rib (139) is installed in a form that gradually decreases from the mounting tube (131) toward one side of the main body part (111), thereby allowing the motor inside the mounting tube (131) to be mounted more smoothly in one direction, and in another direction, the frictional force between the motor (300) and the inner wall surface of the mounting tube (131) to be efficiently increased, so that the motor (300) and the mounting tube (131) can be assembled more firmly, effectively preventing the motor inside the mounting tube (131) from rotating around its axis, and at the same time, the outer wall of the motor (300) and the plurality of position-limiting protruding ribs (139) are in contact, so that the outer wall of the motor (300) and the inner wall surface of the inner perimeter wall (138) have a constant gap, so that the vibration of the motor (300) transmitted to the mounting tube (131) can be further reduced, so that the entire elastic cushioning member (130) is cushioned and has the effect of cushioning shock. It can be improved.

[0058] In one embodiment, referring again to FIGS. 1 to 6, a circumferential position limiting part (140) is installed on the inner wall of the inner perimeter wall (138) to limit the rotation of the motor (300) around its axis. The circumferential position limiting part (140) may be a position limiting projection or a position fixing groove. Only one circumferential position limiting part (140) may be installed, or a plurality of circumferential position limiting parts (140) may be spaced apart and installed around the circumferential direction of the inner perimeter wall (138). The plurality of circumferential position limiting parts (140) may be entirely position limiting projections or position fixing grooves, or partially position limiting projections or position fixing grooves, and are not specifically limited here. A circumferential position limiting part (140) is installed on the inner wall of the inner perimeter wall (138), and a circumferential matching part is installed on the circumferential position limiting part (140) corresponding to the motor (300) mounting seat. A circumferential position limiting part (140) is installed on the inner wall of the inner perimeter wall (138), and after the motor (300) is mounted inside the mounting tube (131), the circumferential position limiting part (140) is matched to the circumferential matching part on the motor (300) mounting seat, thereby limiting the motor (300) from rotating around its axis.

[0059] In one embodiment, as shown in FIGS. 1 to 3, the width of at least some buffer protrusions (137) in the circumferential direction of the mounting tube (131) is greater than the width of the insertion connection protrusions (118) adjacent thereto in the circumferential direction of the mounting tube (131).

[0060] In this embodiment, understandably, the cushioning projection (137) can be elastically deformed to act as an elastic cushion, and the insertion connecting projection (118) is made of a hard material to act as a support. Since the width of at least some of the cushioning projections (137) in the circumferential direction of the mounting tube (131) is greater than the width of the insertion connecting projections (118) adjacent to it on the connecting ring (120), the structural strength of the cushioning projections (137) can be increased, so that when the cushioning projections (137) receive a large impact force, the problem of difficulty in recovery due to excessive deformation does not occur, thereby improving the service life of the entire bracket assembly (100) and ensuring product quality.

[0061] In one embodiment, referring to FIGS. 1 to 7, a connecting structure (114) is connected to one end of the main body part (111); the width of the cushioning projection (137) is installed in a shape that gradually decreases toward the main body part (111) in the circumferential direction of the mounting tube (131); and the width of the insertion connecting projection (118) is installed in a shape that gradually decreases toward the main body part (111) in the circumferential direction of the mounting tube (131).

[0062] In this embodiment, the width of the cushioning projection (137) is installed in a shape that gradually decreases toward the main body portion (111) in the circumferential direction of the mounting tube (131), and the width of the insertion connecting projection (118) is installed in a shape that gradually decreases toward the main body portion (111), that is, the cushioning projection (137) and the insertion connecting projection (118) have a conical structure with a wide bottom portion and a narrow top portion. Accordingly, by guiding the connection of the two in one direction, the connection matching between the plurality of cushioning projections (137) and the first insertion connecting groove (119), and between the plurality of insertion connecting projections (118) and the second insertion connecting groove (136) can be made easier; In another aspect, the connection strength of the cushioning protrusion (137) in the mounting tube (131) and the connection strength of the insertion connection protrusion in the connecting ring (120) can be ensured, thereby preventing the cushioning protrusion (137) and the insertion connection protrusion (118) from becoming disconnected due to excessive vibration or long-term use.

[0063] Furthermore, in the circumferential direction of the mounting tube (131), the width of the cross-section of the cushioning projection (137) facing the main body (111) is greater than half the maximum width of the cushioning projection (137), and the width of the cross-section of the insertion connection projection (118) facing away from the main body (111) is greater than half the maximum width of the insertion connection projection (118).

[0064] In this embodiment, to be understood, the cross-section of the cushioning projection (137) facing the main body (111) is an axial cushioning surface (135), and the cross-section of the insertion connecting projection (118) facing away from the main body (111) is an axial matching surface (117). If the width of the cross-section of the cushioning projection (137) facing the main body (111) is smaller than half the maximum width of the cushioning projection (137), the width of the cross-section of the insertion connecting projection (118) facing away from the main body (111) is smaller than half the maximum width of the insertion connecting projection (118), so the widths of the axial cushioning surface (135) and the axial matching surface (117) become excessively small, and the connection area between the two is very small. Therefore, the ends of the insertion connection projection (118) and the cushioning projection (137) are easily deformed, making it difficult for the bracket body (110) and the elastic cushioning member (130) to withstand excessively large impact forces in the axial direction of the mounting tube (131). If the cross-sectional width of the cushioning projection (137) facing away from the main body (111) is greater than half the maximum width of the cushioning projection (137), and the cross-sectional width of the insertion connection projection (118) facing away from the main body (111) is greater than half the maximum width of the insertion connection projection (118), then the area of ​​the cushioning projection (137) and the insertion connection projection (118) that match in the axial direction of the mounting tube (131) becomes sufficiently large, so that the ends of the cushioning projection (137) and the insertion connection projection (118) are not easily deformed, and thus the impact force that the bracket body (110) and the elastic cushioning member (130) can withstand in the axial direction of the mounting tube (131) becomes greater. Accordingly, the entire bracket assembly (100) can be cushioned in the axial direction of the mounting tube (131), and the effect of shock absorption can be improved.

[0065] In one embodiment, as illustrated in FIGS. 1 to 3, FIGS. 5 to 7, FIGS. 9, and FIGS. 10, the elastic cushioning member (130) further includes an elastic guide strip (150) connected to a mounting tube (131), and the elastic guide strip (150) is installed extending toward the main body portion (111) along the axial direction of the mounting tube (131); the elastic guide strip (150) is installed protruding from the outer wall of the main body portion (111) while being partially embedded, and a cushioning bump (151) is installed on the outer wall surface of the elastic guide strip (150).

[0066] In this embodiment, to ensure connection strength, optionally, the elastic guide strip (150) and the mounting tube (131) are integrally molded and installed, and the cushioning bump (151) and the elastic guide strip (150) are integrally molded and installed. The number of elastic guide strips (150) may be one, two, or more than two. When the number of elastic guide strips (150) is multiple, the multiple elastic guide strips (150) may be spaced apart along the circumferential direction of the mounting tube (131). The number of cushioning bumps (151) may be one, or multiple spaced apart according to the length of the elastic guide strip (150). Accordingly, since the elastic guide strip (150) is installed with a portion embedded and protruding from the outer wall of the main body (111), it prevents the elastic guide strip (150) from floating in the air, thereby ensuring stability when the elastic guide strip (150) and the main body (111) are connected. Since the elastic guide strip (150) protrudes from the outer wall of the main body (111), a cushioning bump (151) is installed on the outer wall surface of the elastic guide strip (150). When the bracket assembly (100) is mounted inside the case of the brush handle, the entire brush assembly (100) comes into contact with the outer case of the brush handle through the cushioning bump (151), effectively cushioning the bracket body (110) and the outer case of the brush handle, thereby further reducing vibrations transmitted from the entire bracket assembly (100) to the brush handle.

[0067] Furthermore, at least two elastic guide strips (150) are spaced apart along the circumferential direction of the mounting tube (131), and at least two buffer bumps (151) are spaced apart along the elastic guide strips (150) in the direction of length extension, and the buffer bumps (151) surrounding the axis of the mounting tube (131) are installed surrounding the outer wall of the elastic guide strips (150).

[0068] In this embodiment, when at least two elastic guide strips (150) are spaced apart in the circumferential direction of the mounting tube (131), the mounting tube (131) and the bracket body (110) are elastically connected to the brush handle case through cushioning bumps (151) on both sides in the circumferential direction. This ensures that the force received by cushioning between the entire bracket assembly (100) and the brush handle case is uniformly guaranteed, thereby cushioning the entire structure and improving the shock absorption effect. By spaced at least two cushioning bumps (151) in the direction of length extension on the elastic guide strip (150), the elastic cushioning area and cushioning effect between the bracket assembly (100) and the brush handle case can be further increased. The cushioning bumps (151) are installed to surround the outer wall of the elastic guide strip (150) by surrounding the axis of the mounting tube (131), that is, the outer wall surface of the cushioning bumps (151) protrudes from the corresponding perimeter side wall of the elastic guide strip (150). Accordingly, when the elastic guide strip (150) and the guide groove of the brush handle case are matched, the periphery of the elastic guide strip (150) is connected and matched through the cushioning bump (151) and the inner wall surface of the guide groove, so that the bracket body (110) in the radial and circumferential directions can be cushioned and shock-reducing, thereby improving the overall shock-reducing effect.

[0069] In one embodiment, referring again to FIGS. 1 to 3, FIGS. 5 to 7, FIGS. 9, and FIGS. 10, the elastic guide strip (150) forms a fitting groove (152) between two adjacent cushioning bumps (151), and a fitting projection (113) that matches the fitting groove (152) is installed on the outer wall of the main body part (111). In this way, the effect of cushioning and shock mitigation is ensured, while the elastic guide strip (150) and the main body part (111) can be connected more firmly. Optionally, the elastic guide strip (150) and the main body part (111) are injection molded integrally and installed.

[0070] Based on the above-described embodiment in which at least two elastic guide strips (150) are spaced apart in the circumferential direction of the mounting tube (131), furthermore, as shown in FIGS. 1, 4, 5, and 6, the elastic cushioning member (130) further comprises a first encirclement (161), a second encirclement (162) spaced apart in the axial direction of the mounting tube (131), and a connecting arm (163) connected to the first encirclement (161) and the second encirclement (162);

[0071] The first encirclement section (161) and the second encirclement section (162) extend along the circumferential direction of the main body section (111), and the first encirclement section (161), the second encirclement section (162), and the connecting arm (163) are embedded and installed in the main body section (111);

[0072] At least one of the first encirclement section (161) and the second encirclement section (162) is connected to a plurality of elastic guide strips (150).

[0073] In this embodiment, to ensure structural strength, optionally, a first encirclement (161), a second encirclement (162), and a connecting arm (163) are integrally molded with the mounting tube (131) and installed. To allow for convenient attachment and detachment of the battery (400), the first encirclement (161) and the second encirclement (162) are installed in a ring-shaped structure with half of them enclosed. The connecting arm (163) can connect the middle of the first encirclement (161) and the second encirclement (162) by extending the mounting tube (131) along the axis. When at least one of the first encirclement (161) and the second encirclement (162) is connected to a plurality of elastic guide strips (150), the plurality of elastic guide strips (150) are supported in one direction, and in the other direction, the overall structure of the entire elastic cushioning member (130) becomes more compact and stable. Through the first encirclement part (161), the second encirclement part (162), and the connecting arm (163), the first encirclement part (161), the second encirclement part (162), and the connecting arm (163) are embedded in the main body part (111), so that in one direction, the connection area between the entire elastic cushioning member (130) and the main body part (111) can be effectively increased, so that the elastic cushioning member (130) and the main body part (111) are connected at various angles, thereby ensuring the connection effect between the two, and in another direction, the elastic cushioning member (130) is elastically cushioned and matched with the connection structure (114) of the bracket body (110) through the mounting tube (131), and the elastic cushioning member (130) is elastically matched with the main body part (111) of the bracket body (110) through the first encirclement part (161), the second encirclement part (162), and the connecting arm (163). When cushioning is matched, the elastic cushioning connection area between the elastic cushioning member (130) and the bracket body (110) is increased overall, so that the entire bracket assembly (100) of the electric toothbrush is cushioned and the shock-absorbing effect can be further improved.

[0074] Furthermore, the bracket body (110) and the elastic cushioning member (130) are injection molded as a single unit. Specifically, a secondary injection process is adopted to injection mold the elastic cushioning member (130) and connect it to the rigid bracket body (110). When the bracket body (110) and the elastic cushioning member (130) are injection molded as a single unit, the precision of the connection between the bracket body (110) and the elastic cushioning member (130) can be ensured, and since the overall connection strength is improved, the effect of cushioning the entire unit and mitigating shock can be efficiently realized.

[0075] In the electric toothbrush further presented in the present invention, with reference to FIGS. 8 to 10, the electric toothbrush comprises a brush handle assembly (10), the brush handle assembly (10) comprises a case, a motor (300) mounted inside the case, a battery (400), and a bracket assembly (100) of the electric toothbrush, the specific structure of the bracket assembly (100) of the electric toothbrush refers to the above-described embodiment, the lower end of the motor (300) is mounted inside a motor mounting cavity (132) in the bracket assembly (100) of the electric toothbrush; the battery (400) is mounted inside a battery (400) mounting box (112) in the bracket assembly (100) of the electric toothbrush; and since the electric toothbrush of the present invention adopts the entire technical method of all the above-described embodiments, all beneficial effects obtained by the technical method having at least the above-described embodiments are not explained here in detail. The specific structure of the motor (300) and battery (400) can be referenced from existing designs, so it is not specifically limited here. Specifically, the brush handle assembly (10) further includes a control assembly, and the motor (300) and battery (400) are electrically connected through the control assembly. The electric toothbrush further includes a brush head assembly (20), and the motor shaft (310) of the brush head assembly (20) and the brush handle assembly (10) are detachably connected. The specific structure of the brush head assembly (20) and the detachable connection method of the brush head assembly and the motor shaft (310) can be referenced from existing designs, so they are not mentioned again here.

[0076] As described above, each embodiment is used solely to illustrate the technical solution of the present invention and is not limited thereto. A person skilled in the art should understand that, even with reference to the detailed description of the present invention provided by each of the embodiments described above, the technical solution described in each embodiment may still be modified or equivalent substitutions may be made for some of the technical features. Furthermore, such modifications or substitutions do not deviate from the spirit and scope of the technical solution of each embodiment of the present invention. Explanation of the symbols

[0077] 10: Brush handle assembly 120: Connecting ring 140: Circumference direction position restriction section 100: Bracket Assembly 121: Position limiting flange 150: Elastic guide strip 110: Bracket body 130: Elastic cushioning member 151: Bump 111: Main body part 131: Mounting tube 152: Insertion groove 112: Battery installed 132: Motor mounting cavity 161: 1st Siege Unit 113: Insertable protrusion 133: Motor buffer 162: 2nd Siege Unit 114: Connection Structure 134: Circumferential buffer surface 163: Connecting arm 115: Insertion connection matching section 135: Axial buffer surface 200: Case 116: Circumferential matching surface 136: Second insertion connection groove 300: Motor 117: Axial matching surface 137: Buffer protrusion 310: Motor shaft 118: Insertion connection protrusion 138: Inner perimeter wall 400: Battery 119: First insertion connection groove 139: Position-limiting protruding rib 20: Brush head assembly The realization of the objectives, functional features, and advantages of the present invention can be described in detail by combining embodiments and referring to the drawings.

Claims

Claim 1 A bracket assembly for an electric toothbrush comprises: a bracket body including an interconnected main body and a connecting structure, wherein a battery mounting housing is formed inside the main body and the connecting structure has an insertion connection matching part; and an elastic cushioning member that can be connected to the bracket body by being inserted and fixed in the axial direction of the mounting tube, wherein the mounting tube has a motor mounting cavity formed inside the mounting tube, the mounting tube has a motor cushioning part, and the motor cushioning part and the insertion connection matching part are inserted and connected in the axial direction of the mounting tube and fixed thereto; wherein, the motor cushioning part has a circumferential cushioning surface and an axial cushioning surface; the insertion connection matching part has a circumferential matching surface and an axial matching surface, and the circumferential matching surface and the circumferential cushioning surface are closely connected in the axial direction surrounding the mounting tube; and the axial matching surface and the axial cushioning surface are closely connected in the axial direction of the mounting tube. Claim 2 In claim 1, the insertion connection matching portion includes a plurality of insertion connection protrusions spaced apart along the circumferential direction of the mounting tube, and a first insertion connection groove is formed between two adjacent insertion connection protrusions; an axial matching surface is formed on the bottom wall of the first insertion connection groove and the end wall of the insertion connection protrusion; and a circumferential matching surface is formed on the side wall of the first insertion connection groove and the side wall of the insertion connection protrusion; the motor damping portion includes a plurality of second insertion connection grooves installed on the end wall of the mounting tube facing the connection structure, and the plurality of second insertion connection grooves are spaced apart along the circumferential direction of the mounting tube, and the mounting tube forms a damping protrusion between two adjacent second insertion connection grooves; and an axial damping surface is formed on the bottom wall of the second insertion connection groove and the end wall of the damping protrusion. A bracket assembly for an electric toothbrush characterized in that a circumferential cushioning surface is formed on the side wall of the second insertion connection groove and the side wall of the cushioning projection; a plurality of cushioning projections correspond to each other and are inserted and connected to a plurality of first insertion connection grooves and fixed; and a plurality of insertion connection projections correspond to each other and are inserted and connected to a plurality of second insertion connection grooves and fixed. Claim 3 A bracket assembly for an electric toothbrush according to paragraph 2, wherein the mounting tube further comprises an inner circumferential wall, the motor mounting cavity is formed surrounding the inner circumferential wall, a plurality of cushioning protrusions are located on the outer circumferential wall of the inner circumferential wall, and the inner circumferential wall is embedded and installed in the inner circumferential of the insertion connection matching part. Claim 4 A bracket assembly for an electric toothbrush according to claim 3, wherein the connection structure further comprises a connection ring and a position limiting flange, wherein the connection ring is connected to one end of the insertion connection matching portion facing the mounting tube; the position limiting flange is connected to the inner wall surface of the connection ring; and the buffer projection protrudes from the edge of the inner perimeter wall facing the main body portion and can be embedded and installed on the inner wall surface of the connection ring, and is connected to the position limiting flange. Claim 5 A bracket assembly for an electric toothbrush according to claim 3, wherein a plurality of position-limiting protruding ribs extending along the axis of the mounting tube are installed on the inner wall surface of the inner perimeter wall, the plurality of position-limiting protruding ribs are spaced apart and installed around the circumferential direction of the inner perimeter wall, and the protruding height of the position-limiting protruding ribs is installed in a form that gradually decreases from the mounting tube toward one side of the main body part. Claim 6 A bracket assembly for an electric toothbrush according to claim 3, characterized in that a circumferential position limiting part is installed on the inner wall of the inner perimeter wall to limit the rotation of the motor around its axis. Claim 7 A bracket assembly for an electric toothbrush, characterized in that, in any one of claims 2 to 6, the width of at least some of the cushioning protrusions in the circumferential direction of the mounting tube is greater than the width of the insertion connecting protrusions adjacent thereto in the circumferential direction of the mounting tube. Claim 8 A bracket assembly for an electric toothbrush, characterized in that, in any one of claims 2 to 6, the connecting structure is connected to one end of the main body part; the width of the cushioning projection in the circumferential direction of the mounting tube is installed in a form that gradually decreases toward one side of the main body part; and the width of the insertion connecting projection in the circumferential direction of the mounting tube is installed in a form that gradually decreases toward one side of the main body part. Claim 9 A bracket assembly for an electric toothbrush according to claim 8, characterized in that, in the circumferential direction of the mounting tube, the width of the cross-section of the cushioning projection facing the main body is greater than half the maximum width of the cushioning projection, and the width of the cross-section of the insertion connecting projection facing away from the main body is greater than half the maximum width of the insertion connecting projection. Claim 10 A bracket assembly for an electric toothbrush according to any one of claims 1 to 6, wherein the elastic cushioning member further comprises an elastic guide strip connected to the mounting tube, and the elastic guide strip is installed extending toward the main body portion along the axial direction of the mounting tube; and the elastic guide strip is installed protruding from the outer wall of the main body portion while being partially embedded, and a cushioning bump is installed on the outer wall surface of the elastic guide strip. Claim 11 A bracket assembly for an electric toothbrush according to claim 10, wherein at least two elastic guide strips are spaced apart in the circumferential direction of the mounting tube, at least two cushioning bumps are spaced apart in the elastic guide strips in the direction in which their lengths extend, and the cushioning bumps surrounding the axis of the mounting tube are installed surrounding the outer wall of the elastic guide strips. Claim 12 A bracket assembly for an electric toothbrush according to claim 11, wherein the elastic guide strip forms a fitting groove between two adjacent buffer bumps, and a fitting projection matching the fitting groove is installed on the outer wall of the main body portion. Claim 13 A bracket assembly for an electric toothbrush according to claim 11, wherein the elastic cushioning member further comprises a first encirclement, a second encirclement, and a connecting arm connected to the first encirclement and the second encirclement, which are spaced apart in the axial direction of the mounting tube; wherein the first encirclement and the second encirclement extend along the circumferential direction of the main body, and the first encirclement, the second encirclement, and the connecting arm are embedded in the main body; and wherein at least one of the first encirclement and the second encirclement is connected to a plurality of elastic guide strips. Claim 14 A bracket assembly for an electric toothbrush according to claim 1, characterized in that the bracket body and the elastic cushioning member are integrally injection molded. Claim 15 An electric toothbrush comprising a brush handle assembly, wherein the brush handle assembly comprises a case, a motor mounted inside the case, a battery, and a bracket assembly of the electric toothbrush according to any one of claims 1 to 6; wherein the lower end of the motor is mounted inside a motor mounting cavity in the bracket assembly of the electric toothbrush; and wherein the battery is mounted inside a battery mounting housing in the bracket assembly of the electric toothbrush.

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