Electric-motor support, electric-motor module and electric toothbrush

Abstract

Disclosed in the embodiments of the present application are an electric-motor support, an electric-motor module and an electric toothbrush, wherein the electric-motor support is configured to be arranged on the electric-motor module, and the electric-motor support has a first surface facing the electric-motor module. The electric-motor support comprises: a rigid main body, which is a hard rubber member; and a shock absorption structure, which is a soft rubber member, wherein the shock absorption structure and the rigid main body are integrally formed by means of injection molding; and the shock absorption structure comprises a joining portion and a plurality of shock absorption protrusions arranged on the joining portion, the joining portion being connected to the rigid main body, the plurality of shock absorption protrusions being arranged at intervals, and the shock absorption protrusions protruding from the first surface. With such a configuration, it is possible to reduce assembly procedures and the assembly difficulty and ensure a good shock absorption effect.

Description

Motor bracket, motor module and electric toothbrush Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor bracket, a motor module and an electric toothbrush. Background Art

[0002] In related technology development, motor brackets are typically single-piece structures made of a single material, serving only to support and secure the motor. The bracket itself has poor vibration damping, requiring the use of additional damping pads, which increases assembly time and complexity. Furthermore, over time, vibrations can cause the pads to fall off the bracket, leading to a decrease in vibration damping effectiveness.

[0003] Application Contents

[0004] The main purpose of this application is to propose a motor bracket, a motor module and an electric toothbrush, aiming to ensure good shock absorption effect while solving the technical problems of traditional motor assembly processes with many steps and high assembly difficulty.

[0005] To achieve the above objectives, the present application proposes a motor bracket, which is used to be arranged on a motor module. The motor bracket has a first surface facing the motor module, and includes:

[0006] a rigid body, wherein the rigid body is a hard plastic part; and

[0007] The shock-absorbing structure is a soft rubber part, and the shock-absorbing structure is integrally injection-molded with the rigid body. The shock-absorbing structure includes a joint and a plurality of shock-absorbing protrusions arranged on the joint. The joint is connected to the rigid body, and the plurality of shock-absorbing protrusions are arranged at intervals, and the shock-absorbing protrusions protrude from the first surface.

[0008] Optionally, a glue containing groove is provided on the first surface, and the coupling portion is embedded in the glue containing groove.

[0009] Optionally, a side of the coupling portion facing away from the glue containing groove is flush with the first surface.

[0010] Optionally, the rigid body is cylindrical and has a glue injection hole at one end. The first surface is the inner wall surface of the rigid body. The glue containing groove includes a first groove. The first groove extends along the axial direction of the rigid body. One end of the first groove is connected to the glue injection hole. The width of the first groove gradually increases in the direction away from the glue injection hole.

[0011] Optionally, a limiting groove is further provided at the bottom of the glue containing groove, and a part of the coupling portion is embedded in the limiting groove.

[0012] Optionally, the rigid body has a first end face and a second end face arranged opposite to each other, the first surface connects the first end face and the second end face, the first end face is provided with a glue injection hole, and the glue injection hole is connected to the glue containing groove; the limiting groove passes through the second end face.

[0013] Optionally, the rigid body is cylindrical, the first surface is an inner wall surface of the rigid body, the glue containing groove includes a first groove and a second groove, the first groove extends along the axial direction of the rigid body, one end of the first groove is connected to the glue injection hole, the other end of the first groove is connected to the second groove, and the second groove extends along the circumference of the rigid body;

[0014] The limiting groove is provided in the second groove, and a length of the limiting groove along the circumference of the rigid body is equal to a length of the second groove along the circumference of the rigid body.

[0015] Optionally, the rigid body is cylindrical, and the shock-absorbing structure is arranged on the peripheral wall of the rigid body; the shock-absorbing structure includes a plurality of shock-absorbing segments, and the plurality of shock-absorbing segments are distributed at intervals along the circumference of the rigid body, and the shock-absorbing segments extend along the axial direction of the rigid body, and the shock-absorbing segments are provided with a plurality of shock-absorbing protrusions.

[0016] Optionally, the shock-absorbing structure further includes a connecting segment, which extends along the circumference of the rigid body and connects the plurality of shock-absorbing segments.

[0017] Optionally, the rigid body is provided with a plurality of glue injection holes, and the plurality of glue injection holes are distributed at intervals along the circumference of the rigid body, each of the glue injection holes corresponds to a shock-absorbing segment, one end of the shock-absorbing segment is located in the glue injection hole, and the other end of the shock-absorbing segment is connected to the connecting segment.

[0018] Optionally, the shock absorbing structure includes a plurality of connecting segments, which are spaced apart along the circumference of the rigid body, and each connecting segment connects a different plurality of shock absorbing segments.

[0019] Optionally, the plurality of shock-absorbing segments are evenly distributed along the circumference of the rigid body, each shock-absorbing segment is provided with a plurality of shock-absorbing protrusions, and the plurality of shock-absorbing protrusions located in the same shock-absorbing segment are evenly distributed along the axial direction of the rigid body.

[0020] The present application also provides a motor module, including:

[0021] A motor module, the motor module comprising a motor housing, a stator and a rotor, the motor housing having a receiving cavity, the stator and the rotor being disposed in the receiving cavity; and

[0022] A motor bracket is arranged on the outside of the motor shell, the rigid body is fixed to the motor shell, and the shock-absorbing protrusion faces the outer surface of the motor shell.

[0023] Optionally, the shock-absorbing protrusion abuts against the outer surface of the motor housing; or,

[0024] The motor module further includes a shock-absorbing sleeve. The motor housing, the shock-absorbing sleeve and the motor bracket are sequentially arranged inside and outside each other. The shock-absorbing sleeve abuts against the motor housing and the shock-absorbing protrusion respectively.

[0025] The present application also provides an electric toothbrush, comprising:

[0026] a handle comprising a housing defining a mounting cavity; and

[0027] A motor module is arranged in the installation cavity, and the motor bracket is fixed to the shell.

[0028] The technical solution of the present application combines the rigid body and the shock-absorbing structure by integral injection molding, with a high degree of integration, which not only effectively plays a shock-absorbing role but also prevents the shock-absorbing structure from falling off the rigid body after long-term use. At the same time, the integral injection molding method is easy to process, eliminating the assembly process, and the direct injection molding has high precision, a simple and compact structure, which can avoid vibration caused by assembly errors and further reduce noise. Furthermore, the assembly efficiency of the overall structure is high, which can further reduce costs. In addition, by forming a shock-absorbing protrusion on the shock-absorbing structure, the shock-absorbing protrusion protrudes from the surface of the rigid body, and the shock-absorbing protrusion points to the vibration source (such as the motor module) and can contact the vibration source, avoiding direct contact between the vibration source and the rigid body, thereby preventing the vibration generated by the vibration source from being directly transmitted to the rigid body and causing the rigid body to vibrate together. The two adjacent shock-absorbing protrusions are spaced apart, and the spacing can provide space for the deformation of the shock-absorbing protrusion. When the shock-absorbing protrusion is squeezed by the vibration from the vibration source, the shock-absorbing protrusion deforms toward the spacing to absorb and release most of the vibration; at the same time, the spacing can also be used as a sound-absorbing cavity to absorb some noise. Therefore, the formation of multiple shock-absorbing protrusions has a better shock-absorbing effect than the shock-absorbing method of an overall plane form. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] FIG1 is a schematic structural diagram of a motor bracket according to an embodiment of the present application;

[0031] FIG2 is a schematic cross-sectional view of the motor bracket in FIG1 ;

[0032] FIG3 is an exploded schematic diagram of the motor bracket in FIG1 ;

[0033] FIG4 is a schematic structural diagram of the rigid body in FIG1 ;

[0034] FIG5 is another cross-sectional schematic diagram of the motor bracket in FIG1 ;

[0035] FIG6 is an enlarged schematic diagram of point A in FIG5 ;

[0036] FIG7 is a schematic cross-sectional view of the rigid body in FIG1 ;

[0037] FIG8 is an enlarged schematic diagram of point B in FIG7;

[0038] FIG9 is a schematic plan view of the rigid body in FIG4 ;

[0039] FIG10 is a schematic structural diagram of a motor module according to an embodiment of the present application;

[0040] FIG11 is a schematic cross-sectional view of the motor module in FIG10 ;

[0041] FIG12 is an enlarged schematic diagram of point C in FIG11;

[0042] FIG13 is a partially enlarged schematic diagram of a motor module in another embodiment of the present application;

[0043] FIG14 is a schematic structural diagram of the motor housing in FIG10 ;

[0044] FIG15 is a schematic structural diagram of an electric toothbrush in an embodiment of the present application;

[0045] FIG16 is a partial cross-sectional schematic diagram of the electric toothbrush in FIG15 .

[0046] Description of Figure Numbers: DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] It should be noted that, in the description of this application, if the terms "first", "second", etc. appear, "first" and "second" are only used to facilitate the description of different components or names, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" appears in the full text, its meaning is to include three parallel solutions. Taking "A and / or B as an example", it includes Solution A, Solution B, or solutions that meet both A and B.

[0049] Please refer to Figures 1 to 3. The embodiment of the present application provides a motor bracket 10. The motor bracket 10 is used to be set on the motor module to fix the motor module to other structures, thereby preventing the motor module from shaking at will. The motor bracket 10 has a first surface 111 facing the motor module. The motor bracket 10 includes: a rigid body 11 and a shock-absorbing structure 12. The rigid body 11 is a hard plastic part; the shock-absorbing structure 12 is a soft plastic part. The shock-absorbing structure 12 and the rigid body 11 are integrally injection-molded. The shock-absorbing structure 12 includes a joint 121 and a plurality of shock-absorbing protrusions 122 provided on the joint 121. The joint 121 is connected to the rigid body 11. The plurality of shock-absorbing protrusions 122 are arranged at intervals, and the shock-absorbing protrusions 122 protrude from the joint 121 and the first surface 111 of the rigid body 11.

[0050] In the embodiment of the present application, the rigid body 11 and the shock absorbing structure 12 are combined together by integral injection molding, and the degree of combination is high, which not only effectively plays a shock absorbing role, but also the shock absorbing structure 12 will not fall off the rigid body 11 after long-term use. At the same time, the one-piece injection molding method is convenient to process, eliminating the assembly process, and the precision of direct injection molding is high, the structure is simple and compact, and the vibration caused by assembly errors can be avoided, further reducing noise. Furthermore, the assembly efficiency of the overall structure is high, which can further reduce costs. Furthermore, by forming a shock absorbing protrusion 122 on the shock absorbing structure 12, the shock absorbing protrusion 122 protrudes from the surface of the rigid body 11, and the shock absorbing protrusion 122 points to the vibration source (such as the motor housing 20) and can contact the vibration source, avoiding direct contact between the vibration source and the rigid body 11, thereby avoiding the vibration generated by the vibration source from being directly transmitted to the rigid body 11 and causing the rigid body 11 to vibrate together. Furthermore, the spacing between adjacent damping protrusions 122 provides space for deformation. When the damping protrusions 122 are subjected to vibration from a vibration source (e.g., the motor housing 20), the damping protrusions 122 deform toward the spacing, absorbing and releasing most of the vibration. Furthermore, the spacing also serves as a sound-absorbing cavity, absorbing some of the noise. Therefore, forming multiple damping protrusions 122 provides a better damping effect than a single, flat surface.

[0051] The rigid body 11 and the shock-absorbing structure 12 are both made of plastic. The rigid body 11 has greater rigidity and strength than the shock-absorbing structure 12. The rigid body 11 serves as the main component and plays a supporting and fixing role; the shock-absorbing structure 12 has lower rigidity, is relatively soft, has better elasticity, and plays a better shock-absorbing function.

[0052] Optionally, the rigid body 11 can be made of materials such as ABS (acrylonitrile butadiene styrene), PC (polycarbonate), and PA (polyamide). The shock-absorbing structure 12 can be made of TPU (thermoplastic polyurethane) or silicone. In some specific embodiments, considering the molding temperature and sequence, the rigid body 11 is injection molded first, and then the shock-absorbing structure 12 is integrally injection molded on the rigid body 11. Therefore, the shock-absorbing structure 12 can be made of TPU with a lower melting point to avoid the melting point of the shock-absorbing structure 12 being too high, which may cause the rigid body 11 to melt.

[0053] Please refer to Figures 3 and 4 . In order to further improve the adhesion of the shock-absorbing structure 12 to the rigid body 11 and reduce the risk of the two falling off, in some embodiments, the rigid body 11 has a first surface 111, the first surface 111 is provided with a glue-receiving groove 112, the coupling portion 121 is disposed in the glue-receiving groove 112, and the shock-absorbing protrusion 122 protrudes from the first surface 111. Therefore, the coupling portion 121 is embedded in the glue-receiving groove 112, and the coupling portion 121 fills the glue-receiving groove 112, forming a mutually interlocking structure. This can increase the contact area, i.e., the connection area, between the coupling portion 121 and the rigid body 11, thereby achieving a better connection effect and more stable adhesion of the coupling portion 121 to the rigid body 11.

[0054] Optionally, the side of the coupling portion 121 facing away from the adhesive groove 112 is flush with the first surface 111, and the coupling portion 121 does not protrude from the first surface 111, thereby reducing the risk of the coupling portion 121 being detached from the rigid body 11 due to collision with other structures. The side of the coupling portion 121 facing away from the adhesive groove 112 refers to the side of the coupling portion 121 facing the notch.

[0055] The shape of the adhesive groove 112 matches the shock-absorbing structure 12 and is designed according to the shape of the shock-absorbing structure 12 to be formed. Therefore, when the shock-absorbing structure 12 is designed to be elongated, the adhesive groove 112 is also designed to be elongated; when the shock-absorbing structure 12 is designed to be annular, the adhesive groove 112 is also designed to be elongated. A specific shape of the adhesive groove 112 (including the first groove 1121 and the second groove 1122) will be described in detail in the following embodiments.

[0056] In some embodiments, the rigid body 11 is cylindrical and has a glue injection hole 113 at one end. The first surface 111 is the inner wall surface of the rigid body 11. The glue holding groove 112 includes a first groove 1121. The first groove 1121 extends along the axial direction of the rigid body 11, and one end of the first groove 1121 is connected to the glue injection hole 113. Therefore, the shock-absorbing structure 12 filled in the first groove 1121 is in the shape of an elongated strip extending in the axial direction of the rigid body 11. When glue is injected from the glue injection hole 113, the glue flows along the length direction of the first groove 1121 without turning, and has good flow performance. Optionally, the width D1 of the first groove 1121 gradually increases in the direction away from the glue injection hole 113, so that the glue can be guided along the flow direction of the glue, which is conducive to the glue flowing to the far end of the glue injection hole 113, facilitating the glue to fill the first groove 1121 more quickly. The width of the first groove 1121 refers to the width along the circumference of the rigid body 11.

[0057] In some embodiments, the glue containing groove 112 also includes a second groove 1122, one end of the first groove 1121 is connected to the glue injection hole 113, and the other end of the first groove 1121 is connected to the second groove 1122, and the second groove 1122 extends along the circumference of the rigid body 11, so the second groove 1122 is set at an end away from the glue injection hole 113. Each second groove 1122 is connected to multiple first grooves 1121. In the shock-absorbing structure 12 formed by the first grooves 1121 and the second grooves 1122, multiple shock-absorbing segments 1221 are simultaneously connected to a connecting segment 1222. The connecting segment 1222 realizes the connection of multiple shock-absorbing segments 1221 to form an overall structure. This not only generates mutually restraining limiting forces between the multiple shock-absorbing segments 1221 and between the shock-absorbing segments 1221 and the connecting segment 1222, thereby reducing the risk of the shock-absorbing structure 12 falling off the rigid body 11; it also allows the rubber to flow from the multiple first grooves 1121 and then converge into the second groove 1122. The rubber is buffered to a certain extent in the second groove 1122, and will not accumulate at the bottom of the first groove 1121 to cause excessive wall thickness. Furthermore, the second groove 1122 serves as a converging groove for the rubber flowing out of the multiple first grooves 1121. The rubber flowing out of the first groove 1121 naturally flows into the second groove 1122 and gradually diverts to both sides in the circumferential direction. Basically, there is no need for excessively large and rapid turns, which is also conducive to the smooth flow of the rubber.

[0058] Optionally, the width D2 of the second groove 1122 is consistent at all locations, so the width of the connecting section 1222 is also consistent at all locations. In this embodiment, the width of the second groove 1122 refers to the width along the axial direction of the rigid body 11 .

[0059] Please refer to Figures 5 to 8. Furthermore, a limiting groove 114 is provided at the bottom of the glue-containing groove 112, and a portion of the coupling portion 121 is embedded in the limiting groove 114. In this embodiment, the glue-containing groove 112 has a notch on the first surface 111, and the bottom of the glue-containing groove 112 refers to the side facing the notch. At the position where the limiting groove 114 is provided, the glue-containing groove 112 and the limiting groove 114 are superimposed in the notch direction and have a greater depth; at the position where only the glue-containing groove 112 is provided, the glue-containing groove 112 has a smaller depth. The coupling portion 121 fills both the glue-containing groove 112 and the limiting groove 114, and the coupling portion 121 and the limiting groove 114 form a mutually interlocking structure. The portion of the coupling portion 121 in the limiting groove 114 serves as a limiting protrusion 123. The limiting protrusion 123 is equivalent to a rivet, which anchors the shock-absorbing structure 12 and the rigid body 11 to enhance the matching stability of the two.

[0060] The number of the limiting grooves 114 can be one or more, and the shape of the limiting grooves 114 can be a small circular groove, a small square hole, a long groove, an arc groove, etc. The limiting grooves 114 can be distributed at various positions of the glue receiving groove 112, such as a position close to the glue injection hole 113, a position far away from the glue injection hole 113, etc.

[0061] In some embodiments, the rigid body 11 has a first end face 115 and a second end face 116 disposed opposite to each other. A first surface 111 connects the first end face 115 and the second end face 116. The first end face 115 is provided with a glue injection hole 113, which is connected to a glue receiving groove 112. A limiting groove 114 extends through the second end face 116. When the shock-absorbing structure 12 is integrally injection-molded on the rigid body 11, the glue forming the shock-absorbing structure 12 is injected from the glue injection hole 113 and flows along the first surface 111. Alternatively, when a glue receiving groove 112 is provided on the first surface 111, the glue flows along the glue receiving groove 112 on the first surface 111. When the glue cools, the shock-absorbing structure 12 is ultimately formed.

[0062] In this embodiment, the glue holding groove 112 extends from the first end face 115 to the second end face 116, and the limiting groove 114 passes through the second end face 116. Therefore, it can be seen that the limiting groove 114 is set away from the glue injection hole 113, and the limiting groove 114 forms a notch groove. Therefore, the limiting groove 114 can also be used as a glue sealing groove and as the parting surface between the fixed mold and the movable mold. When the shock-absorbing structure 12 is embedded in the limiting groove 114, the shock-absorbing structure 12 forms a limiting protrusion 123, which acts like a hook and can hook the groove wall of the limiting groove 114, limiting the movement of the shock-absorbing structure 12 from the second end face 116 to the first end face 115.

[0063] Optionally, the limiting groove 114 is arranged in the second groove 1122, and the length of the limiting groove 114 along the circumference of the rigid body 11 is equal to the length of the second groove 1122 along the circumference of the rigid body 11, and the two ends of the limiting groove 114 along the circumference of the rigid body 11 are flush with the two ends of the second groove 1122 along the circumference of the rigid body 11. After such an arrangement, the rubber material flowing out from the side of the second groove 1122 away from the first groove 1121 can directly enter the sealing groove without changing direction, which is conducive to the flow of the rubber material, reduces the risk of burrs, etc., and allows the side of the connecting section 1222 away from the shock-absorbing section 1221 to be used as a parting surface. Of course, the length of the limiting groove 114 can also be less than the length of the second groove 1122. In other embodiments, the limiting groove 114 is arranged in the first groove 1121. In this embodiment, the circumferential length of the rigid body 11 refers to the circumferential length of the connecting segment 1222 . As shown in FIG. 1 , the chord length L represents the circumferential length of the connecting segment 1222 .

[0064] When the rigid body 11 is cylindrical, an annular groove may be provided on the inner peripheral wall of the rigid body 11 , and a portion of the annular groove constitutes the second groove 1122 , thereby facilitating processing.

[0065] In the embodiment of the present application, the rigid body 11 can be cylindrical, annular, disc-shaped, sheet-shaped, or plate-shaped, and can be specifically designed based on factors such as the shape of the motor housing 20, the location of the motor bracket 10 on the motor housing 20, or the location where shock absorption is required. In some embodiments, the rigid body 11 is cylindrical, and the shock absorption structure 12 is disposed on the peripheral wall of the rigid body 11. For example, depending on the relative position of the rigid body 11 and the motor housing 20, the shock absorption structure 12 can be disposed on the inner peripheral wall or the outer peripheral wall of the rigid body 11.

[0066] Referring again to Figures 1 to 3 , in some embodiments, the shock-absorbing structure 12 includes a plurality of shock-absorbing segments 1221 spaced apart along the circumference of the rigid body 11. The shock-absorbing segments 1221 extend axially along the rigid body 11 and are provided with a plurality of shock-absorbing protrusions 122. If the entire inner circumferential wall of the rigid body 11 were covered entirely by the shock-absorbing structure 12, the flow range of the rubber would be too large, resulting in poor rubber fluidity, making it difficult to form a joint 121 with uniform wall thickness. This could even lead to uneven rubber or no rubber filling in locations far from the injection hole 113. In this embodiment, the shock-absorbing structure 12 is divided into a plurality of spaced apart shock-absorbing segments 1221, so that the shock-absorbing structure 12 does not completely cover the circumferential wall of the rigid body 11. This results in a relatively small flow range for the rubber, resulting in better fluidity. At the same time, the plurality of shock-absorbing sections 1221 are distributed at intervals along the circumference of the rigid body 11 , so that they can have a good shock-absorbing effect on the motor housing 20 at different positions in the circumference, effectively preventing the vibration of the motor housing 20 from being transmitted outward.

[0067] Furthermore, the shock-absorbing structure 12 also includes a connecting section 1222 , which extends along the circumference of the rigid body 11 and connects multiple shock-absorbing sections 1221 , so that the multiple shock-absorbing sections 1221 can be connected to form a whole, which is beneficial to the fixation of the shock-absorbing sections 1221 .

[0068] Optionally, the shock-absorbing structure 12 includes a plurality of connecting segments 1222, which are spaced apart along the circumference of the rigid body 11, with each connecting segment 1222 connecting to a different plurality of shock-absorbing segments 1221. Thus, two adjacent connecting segments 1222 are effectively cut off, shortening the flow path of the rubber material and facilitating the formation of a regularly shaped shock-absorbing structure 12.

[0069] In some specific embodiments, the shock absorbing structure 12 includes two connecting segments 1222 and four shock absorbing segments 1221 , wherein two shock absorbing segments 1221 are connected to the same connecting segment 1222 , and the other two shock absorbing segments 1221 are connected to another connecting segment 1222 .

[0070] With reference to FIG9 , in some embodiments, the rigid body 11 is provided with a plurality of glue injection holes 113 spaced apart along the circumference of the rigid body 11. Each glue injection hole 113 corresponds to a shock absorbing segment 1221. One end of the shock absorbing segment 1221 is located within the glue injection hole 113, and the other end of the shock absorbing segment 1221 is connected to the connecting segment 1222. Therefore, the shock absorbing segments 1221 do not share a glue injection hole 113. The flow path of the glue entering through a single glue injection hole 113 is relatively short, shortening the overall molding time and facilitating consistent temperature maintenance at all locations of the glue, thereby forming a uniformly shaped shock absorbing structure 12. Furthermore, because the glue injection hole 113 is located at one end of the shock absorbing segment 1221 in its longitudinal direction, the glue entering through the glue injection hole 113 flows directly along the length of the shock absorbing segment 1221 without changing its flow direction.

[0071] In some embodiments, multiple shock-absorbing segments 1221 are evenly distributed along the circumference of the rigid body 11. Each shock-absorbing segment 1221 is provided with multiple shock-absorbing protrusions 122. The multiple shock-absorbing protrusions 122 located in the same shock-absorbing segment 1221 are evenly distributed along the axial direction of the rigid body 11. Therefore, the shock-absorbing protrusions 122 are evenly distributed in both the circumferential and axial directions of the rigid body 11. The shock-absorbing protrusions 122 can exert a stable and uniform force on the motor housing 20, so that the motor housing 20 is evenly stressed, the motor housing 20 is maintained in a predetermined position, and the risk of the motor housing 20 deviating from the predetermined position is reduced.

[0072] Taking four shock-absorbing segments 1221 as an example, the angle between any two adjacent shock-absorbing segments 1221 is 90°, so the four shock-absorbing segments 1221 are evenly distributed around the rigid body 11 .

[0073] The shock-absorbing protrusion 122 may be in a hemispherical, cylindrical, conical, or other shape, and its shape is not limited.

[0074] Please refer to Figures 10 to 14. An embodiment of the present application also provides a motor module 100, which includes: a motor module and a motor bracket 10. The motor module includes a motor housing 20, a stator 31 and a rotor 32. The motor housing 20 has a receiving cavity 21, and the stator 31 and the rotor 32 are arranged in the receiving cavity 21. The motor bracket 10 is arranged on the outside of the motor housing 20, the rigid body 11 is fixed to the motor housing 20, and the shock-absorbing protrusion 122 faces the outer surface of the motor housing 20.

[0075] When the coils of stator 31 are energized, they generate a magnetic field that drives rotor 32 to rotate. Rotating rotor 32 is prone to vibration, which in turn causes vibration in surrounding structures. Since rotor 32 is located within motor housing 20, motor housing 20 acts as a vibration source. Therefore, by positioning motor bracket 10 outside motor housing 20, with shock-absorbing protrusions 122 facing the outer surface of motor housing 20, motor housing 20 is separated from rigid body 11, reducing the transmission of vibration from motor housing 20 to motor bracket 10.

[0076] As shown in FIG. 12 , in some embodiments, the shock-absorbing protrusion 122 directly abuts against the outer surface of the motor housing 20 to limit the outer surface of the motor housing 20 from contacting the rigid body 11 .

[0077] Alternatively, as shown in FIG13 , in other embodiments, the motor module 100 further includes a shock-absorbing sleeve 40. The motor housing 20, the shock-absorbing sleeve 40, and the motor bracket 10 are sequentially arranged inside and outside each other, with the shock-absorbing sleeve 40 respectively contacting the motor housing 20 and the shock-absorbing protrusion 122. Specifically, the vibration of the motor housing 20 is first transmitted to the shock-absorbing sleeve 40. After being damped by the shock-absorbing sleeve 40, the remaining vibration and noise are transmitted to the shock-absorbing structure 12 and are buffered and absorbed by the shock-absorbing structure 12. The simultaneous provision of the shock-absorbing sleeve 40 and the shock-absorbing structure 12 achieves a dual shock-absorbing effect, effectively preventing the transmission of vibration.

[0078] The shock-absorbing sleeve 40 can be made of a material with good shock-absorbing effect, such as silicone, rubber, or TPU.

[0079] Please refer to Figures 15 and 16. An embodiment of the present application also provides an electric toothbrush, which includes a handle 200 and a brush head 300 connected to one end of the handle 200. The handle 200 is used for the user to hold and is usually in the shape of a long strip. The whole can be cylindrical or flat.

[0080] The handle 200 includes a housing 201 having a mounting cavity formed therein. The motor module 100 is disposed in the mounting cavity, and the motor bracket 10 is fixed to the housing 201. The specific structure of the motor module 100 is described in the above embodiment and will not be described again here.

[0081] The rigid body 11 of the motor bracket 10 fixes the motor housing 20 to the outer shell 201 to prevent the motor housing 20 from moving relative to the outer shell 201 , thereby keeping the motor shaft 50 passing through the motor housing 20 at a predetermined position of the brush head 300 .

[0082] Optionally, the rigid body 11 and the motor housing 20 are fixed by screws or snaps.

[0083] Furthermore, the rigid body 11 is provided with an anti-rotation rib 117, and the inner surface of the housing 201 or the buffer structure 400 ( FIG. 16 ) is provided with an anti-rotation groove (not shown). The anti-rotation rib 117 is inserted into the anti-rotation groove to prevent the rigid body 11 from rotating relative to the housing 201, thereby securing the motor bracket 10 relative to the housing 201. Furthermore, one end of the motor module 100 abuts against the inner surface of the housing 201, and the other end of the motor module 100 abuts against the housing 201 via the motor bracket 10. The other end of the motor module 100 is also restricted from rotating by the cooperation of the anti-rotation rib and the anti-rotation groove, thereby securing the motor bracket 10 to the housing 201.

[0084] Furthermore, the motor module 100 also includes a motor shaft 50, which is fixed to the rotor 32 and can rotate with the rotor 32. The motor housing 20 is provided with an axial hole 22. The motor shaft 50 passes through the motor housing 20 from the axial hole 22 and is connected to the brush head 300, thereby driving the brush head 300 to rotate or swing.

[0085] Referring again to Figures 3, 14, and 16, in some embodiments, the rigid body 11 and the motor housing 20 each have a stepped cylindrical shape. The rigid body 11 includes a first large cylindrical section 118 and a first small cylindrical section 119. The first large cylindrical section 118 is longer than the first small cylindrical section 119. The motor housing 20 includes a second large cylindrical section 23 and a second small cylindrical section 24. The first large cylindrical section 118 is sleeved outside the second large cylindrical section 23, and the first small cylindrical section 119 is sleeved outside the second small cylindrical section 24. The first small cylindrical section 119 abuts against the housing 201 via a buffer structure 400, and the shock-absorbing structure 12 is disposed on the first large cylindrical section 118. In this embodiment, one end of the motor bracket 10 abuts against the housing 201 via the buffer structure 400. Therefore, even if vibrations of the motor housing 20 are transmitted from the second small cylindrical section 24, they are absorbed by the buffer structure 400 there, preventing the vibrations from being transmitted to the housing 201. The damping structure 12 is provided in other areas not covered by the buffer structure 400 to absorb vibrations transmitted from the second large cylinder section 23. Furthermore, the damping structure 12 is provided in an area with a longer length and a larger diameter, and surrounds the second large cylinder section 23, thereby substantially reducing the transmission of vibrations there.

[0086] In the above description, the first end surface 115 connects the first large barrel section 118 and the first small barrel section 119 .

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A motor bracket, used for being arranged on a motor module, the motor bracket having a first surface facing the motor module, characterized in that: The motor bracket comprises: A rigid body, wherein the rigid body is a hard plastic part; and The shock absorbing structure is a soft rubber part, the shock absorbing structure and the rigid body are integrally injection molded, the shock absorbing structure includes a joint and a plurality of shock absorbing protrusions arranged on the joint, the joint is connected to the rigid body, the plurality of shock absorbing protrusions are arranged at intervals, and the shock absorbing protrusions protrude from the first surface.

2. The motor bracket according to claim 1, characterized in that: The first surface is provided with a glue containing groove, and the combining portion is embedded in the glue containing groove.

3. The motor bracket according to claim 2, characterized in that: A side of the combining portion facing away from the adhesive containing groove is flush with the first surface.

4. The motor bracket according to claim 2, characterized in that: The rigid body is cylindrical and has a glue injection hole at one end. The first surface is the inner wall surface of the rigid body. The glue containing groove includes a first groove. The first groove extends along the axial direction of the rigid body. One end of the first groove is connected to the glue injection hole. The width of the first groove gradually increases in the direction away from the glue injection hole.

5. The motor bracket according to claim 2, characterized in that: A limiting groove is also provided at the bottom of the glue containing groove, and a part of the combining portion is embedded in the limiting groove.

6. The motor bracket according to claim 5, characterized in that: The rigid body has a first end face and a second end face that are arranged opposite to each other, the first surface connects the first end face and the second end face, the first end face is provided with a glue injection hole, and the glue injection hole is connected to the glue containing groove; the limiting groove runs through the second end face.

7. The motor bracket according to claim 6, characterized in that: The rigid body is cylindrical, the first surface is the inner wall surface of the rigid body, the glue containing groove includes a first groove and a second groove, the first groove extends along the axial direction of the rigid body, one end of the first groove is connected to the glue injection hole, the other end of the first groove is connected to the second groove, and the second groove extends along the circumferential direction of the rigid body; The limiting groove is arranged in the second groove, and the length of the limiting groove along the circumference of the rigid body is equal to the length of the second groove along the circumference of the rigid body.

8. The motor bracket according to any one of claims 1 to 7, characterized in that: The rigid body is cylindrical, and the shock-absorbing structure is arranged on the peripheral wall of the rigid body; the shock-absorbing structure includes a plurality of shock-absorbing segments, and the plurality of shock-absorbing segments are distributed at intervals along the circumference of the rigid body, and the shock-absorbing segments extend along the axial direction of the rigid body, and the shock-absorbing segments are provided with a plurality of shock-absorbing protrusions.

9. The motor bracket according to claim 8, characterized in that: The shock absorbing structure further includes a connecting segment, which extends along the circumference of the rigid body and connects a plurality of the shock absorbing segments.

10. The motor bracket according to claim 9, characterized in that: The rigid body is provided with a plurality of glue injection holes, which are spaced apart along the circumference of the rigid body, each of the glue injection holes corresponds to a shock absorbing segment, one end of the shock absorbing segment is located in the glue injection hole, and the other end of the shock absorbing segment is connected to the connecting segment.

11. The motor bracket according to claim 9, characterized in that: The shock absorbing structure comprises a plurality of connecting segments, wherein the connecting segments are distributed at intervals along the circumference of the rigid body, and each of the connecting segments connects different plurality of shock absorbing segments.

12. The motor bracket according to claim 8, characterized in that: The plurality of shock absorbing sections are evenly distributed along the circumference of the rigid body, each of the shock absorbing sections is provided with a plurality of shock absorbing protrusions, and the plurality of shock absorbing protrusions located in the same shock absorbing section are evenly distributed along the axial direction of the rigid body.

13. A motor module, characterized in that: include: A motor module, the motor module comprising a motor housing, a stator and a rotor, the motor housing having a receiving cavity, the stator and the rotor being arranged in the receiving cavity; as well as, The motor bracket according to any one of claims 1 to 12, wherein the motor bracket is arranged on the outside of the motor housing, the rigid body is fixed to the motor housing, and the shock-absorbing protrusion faces the outer surface of the motor housing.

14. The motor module according to claim 13, characterized in that: The shock-absorbing protrusion abuts against the outer surface of the motor housing; or, The motor module also includes a shock-absorbing sleeve. The motor housing, the shock-absorbing sleeve and the motor bracket are sequentially arranged inside and outside each other. The shock-absorbing sleeve abuts against the motor housing and the shock-absorbing protrusion respectively.

15. An electric toothbrush, characterized in that: include: A handle, the handle comprising a housing, the housing forming a mounting cavity; as well as, The motor module as described in claim 13 or 14, wherein the motor module is arranged in the mounting cavity, and the motor bracket is fixed to the housing.

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