Motor sleeve, motor assembly and electric toothbrush

Abstract

According to the motor sleeve, the motor assembly and the electric toothbrush, the motor sleeve comprises the supporting shell and the damping part formed on the inner wall of the supporting shell, the supporting shell is made of hard materials, the structural strength of the supporting shell can be guaranteed, and the functions of supporting and fixing the motor are achieved; the damping part has higher elasticity and / or flexibility relative to the supporting shell, so that the damping part can buffer the vibration of the motor and reduce noise to improve the use feeling of a user, and meanwhile, the motor sleeve is provided with a matching structure for mounting other parts of the electric toothbrush, so that the motor sleeve is convenient to mount, the stability of an internal structure can be enhanced, and the service life of the motor sleeve is prolonged. By means of the simple structure, multiple functions are achieved, and miniaturization of the electric toothbrush is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of oral cleaning tools, and specifically relates to a motor sleeve, a motor component and an electric toothbrush. Background Art

[0002] Toothbrushes are essential oral cleaning products in people's daily lives. With the improvement of people's living standards, electric toothbrushes have appeared to replace manual work. Electric toothbrushes can instantly break down toothpaste into fine foam. The vibration of the bristles can promote blood circulation in the mouth and have a massage effect on the gum tissue.

[0003] Electric toothbrushes are easy to use and have good cleaning effects. They are increasingly popular among consumers and favored by the market. Existing electric toothbrushes are generally composed of a toothbrush head and a toothbrush handle. The toothbrush handle has a built-in drive device and a power supply component. The output shaft of the drive device extends from the upper end of the toothbrush handle barrel and connects to the toothbrush head. The motor vibration drives the brush head to vibrate, further cleaning the teeth. However, when the user uses it, the vibration of the motor will be transmitted to the user's hand through the hand-held part of the toothbrush, and the vibration of the motor will also generate noise, which will interfere with the user and affect the user's experience. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a motor sleeve, a motor assembly and an electric toothbrush to improve the problem that when the user uses the existing electric toothbrush, the vibration of the motor will be transmitted to the user's hand through the hand-held part of the toothbrush, and the vibration of the motor will also generate noise, thereby interfering with the user and affecting the user's experience.

[0005] In order to solve at least part of the above problems, the utility model provides a motor sleeve, comprising:

[0006] A supporting shell is sleeved on the motor, and a containing space is formed in the supporting shell;

[0007] The shock absorbing part is formed on the inner wall of the supporting shell close to the motor and is located in the accommodating space. The supporting shell and the shock absorbing part are made of different materials. The shock absorbing part has higher elasticity and / or flexibility than the supporting shell, and the shock absorbing part contacts the motor.

[0008] The motor cover provided by the utility model has an accommodating space of a supporting shell for arranging a motor, and the supporting shell can ensure a high structural strength, play the role of supporting and fixing the motor, and when the motor cover and the motor are installed as a whole, since the supporting shell has good structural strength, it is also more convenient for the overall installation and disassembly of the motor cover and the motor; the shock absorbing part is located in the supporting shell, and has higher elasticity and / or flexibility than the supporting shell, so that when the motor vibrates, the shock absorbing part can prevent the transmission of vibration, absorb the energy generated by vibration, and can rebound relatively quickly, so that the motor cover can achieve the purpose of reducing vibration and reducing noise, thereby improving the user's experience; and since the shock absorbing part is formed on the supporting shell, this makes the supporting shell and the shock absorbing part have strong structural stability, and when the motor cover is absorbing shock, the shock absorbing part basically will not fall off compared with the prior art, and the motor cover combines good shock absorbing effect and high structural strength, which is also conducive to improving the service life of the product.

[0009] The utility model also provides a motor sleeve, comprising:

[0010] A supporting shell is sleeved on the motor, and a containing space is formed in the supporting shell;

[0011] The shock absorbing part is formed on the inner wall of the supporting shell close to the motor and is located in the accommodating space. The supporting shell and the shock absorbing part are made of different materials. The supporting shell has higher rigidity and / or hardness than the shock absorbing part, and the shock absorbing part contacts the motor.

[0012] The motor cover provided by the utility model has an accommodating space of a supporting shell for arranging a motor, and the supporting shell can ensure a high structural strength, play the role of supporting and fixing the motor, and when the motor cover and the motor are installed as a whole, since the supporting shell has a higher rigidity and / or hardness than the shock-absorbing part, it has a better structural strength, and is more convenient for the overall installation and disassembly of the motor cover and the motor; the shock-absorbing part is located in the supporting shell, so that when the motor vibrates, the shock-absorbing part can prevent the transmission of vibration, absorb the energy generated by vibration, and can rebound relatively quickly, so that the motor cover can achieve the purpose of reducing vibration and reducing noise, thereby improving the user's experience; and since the shock-absorbing part is formed on the supporting shell, this makes the supporting shell and the shock-absorbing part have a strong structural stability, and when the motor cover is shock-absorbing, the shock-absorbing part basically will not fall off compared with the prior art, and the motor cover combines a better shock-absorbing effect and a higher structural strength, which is also conducive to improving the service life of the product.

[0013] In one embodiment of the present invention, the shock absorbing portion includes an elastic protrusion, and the elastic protrusion contacts the motor.

[0014] With such a configuration, the elastic protrusion can better absorb and disperse vibration, can better buffer the vibration of the motor, and reduce noise, thereby improving the user experience.

[0015] In an embodiment of the present invention, there are multiple elastic protrusions, and at least some of the elastic protrusions extend along the axial direction of the support shell and / or the circumferential direction of the support shell.

[0016] Such arrangement, by extending at least part of the elastic protrusion along the axial and / or circumferential direction of the support shell, enables the shock absorbing part to reduce the axial and / or circumferential vibration of the motor, which is more conducive to comprehensively improving the shock absorption and noise reduction effects.

[0017] In one embodiment of the present invention, the arrangement density of the plurality of elastic protrusions along the axial direction is greater than the arrangement density along the circumferential direction.

[0018] With such a configuration, the arrangement density of the elastic protrusions along the axial and circumferential directions of the supporting shell is different, which is beneficial to accurately buffering the vibrations of the motor in different directions. When the motor of the electric toothbrush realizes the vibration of the brush head, the vibration is transmitted more in the axial direction, and the arrangement density of the elastic protrusions in the axial direction is relatively larger, which enhances the buffering of the axial vibration, thereby being more conducive to improving the shock absorption and noise reduction effects of the shock absorption part, and providing users with a better experience.

[0019] In one embodiment of the present invention, at least some of the elastic protrusions have different degrees of elasticity and / or flexibility.

[0020] With such an arrangement, in the path or space formed by the multiple elastic protrusions, different parts have different shock-absorbing effects. Therefore, when the structure of the electric toothbrush is designed, the vibration degree or amplitude of different parts of the motor will be different. By adjusting the elasticity and / or flexibility of the elastic protrusions of the corresponding parts, precise shock absorption can be achieved, and further better shock absorption effect can be achieved. Moreover, the use of the motor cover will no longer limit the design of the electric toothbrush, that is, there is no need to excessively consider the impact of vibration imbalance during design. Subsequently, the motor cover can achieve better shock absorption and noise reduction purposes, and the electric toothbrush has a high degree of design freedom.

[0021] In one embodiment of the utility model, the shock absorbing portion includes a strip portion, which extends along the axial direction of the support shell and is arranged on the inner wall of the support shell close to the motor, and at least part of the elastic protrusion is arranged on the strip portion.

[0022] In this way, by arranging a plurality of elastic protrusions on the strip portion extending along the axial direction of the support shell, the shock absorbing portion can reduce the vibration transmission in the axial direction of the motor, which is beneficial to improving the shock absorption and noise reduction effects.

[0023] In an embodiment of the present invention, there are multiple strip-shaped portions, and the multiple strip-shaped portions are arranged around the inner wall of the supporting shell.

[0024] In this way, by providing a plurality of strip-shaped portions arranged around the inner wall of the support shell, the shock absorbing and noise reducing effects of the shock absorbing portion are further improved in the circumferential direction of the support shell.

[0025] In an embodiment of the present invention, the shock absorbing portion further comprises an annular portion, which extends along the circumferential direction of the support shell and connects the strip portion, and at least part of the elastic protrusion is arranged on the annular portion.

[0026] In this way, by arranging the elastic protrusion on the annular portion extending along the circumferential direction of the support shell, the shock-absorbing portion can slow down the vibration transmission of the motor in the circumferential direction, which is beneficial to improving the shock absorption and noise reduction effects; and the annular portion is connected to the strip portion, the two can jointly perform buffering and noise reduction, and the overall stability of the noise reduction and buffering structure is also better.

[0027] In one embodiment of the utility model, one end of the support shell has an opening, and the opening allows the motor to extend into the support shell and contact the shock absorbing part; the annular part is located at one end of the support shell close to the opening.

[0028] With such an arrangement, during installation, it is only necessary to extend the end of the motor provided with the output shaft into the motor sleeve from the opening to achieve installation, which is conducive to the convenience of installation between the motor sleeve and the motor; at the same time, the annular portion is arranged at one end of the support shell close to the opening, so that when the motor is installed in the motor sleeve, the annular portion can increase the friction between the motor sleeve at the opening position and the motor, so as to ensure the stability of the connection between the motor sleeve and the motor.

[0029] In one embodiment of the present invention, at least part of the strip portion, the elastic protrusion, the support shell and the annular portion are integrally formed.

[0030] Such a configuration, by configuring at least a portion of the structure as an integrally formed structure, is beneficial to improving production efficiency and facilitating assembly, and is beneficial to improving the overall structural strength of the motor housing.

[0031] In an embodiment of the present invention, the shock absorbing portion comprises an annular portion, the annular portion extends along the circumferential direction of the support shell, and the annular portion is provided with an elastic protrusion.

[0032] In this way, by arranging the elastic protrusion on the annular portion extending along the circumferential direction of the support shell, the shock-absorbing portion can reduce the vibration transmission of the motor in the circumferential direction, which is beneficial to improving the shock-absorbing and noise-reducing effects.

[0033] In an embodiment of the present invention, there are multiple annular portions, and the multiple annular portions are arranged at intervals along the axial direction of the support shell.

[0034] In this way, by arranging a plurality of annular portions spaced apart along the axial direction of the support shell on the inner wall of the support shell, the shock absorbing and noise reducing effects of the shock absorbing portion can be further improved.

[0035] In one embodiment of the present invention, the annular portion, the elastic protrusion and at least a portion of the support shell are integrally formed.

[0036] Such arrangement, by arranging the annular portion, the elastic protrusion and at least a part of the structure of the supporting shell as an integrally formed structure, is conducive to improving production efficiency and facilitating assembly.

[0037] In one embodiment of the present invention, the supporting shell includes a first shell and a second shell, and the first shell is buckled with the second shell and covers the motor.

[0038] Such a configuration, in which the first shell and the second shell are fastened together to cover the motor, is conducive to better protecting the motor, and is also conducive to improving the shock absorption and noise reduction effects, and the first shell and the second shell are also more convenient to assemble with the motor.

[0039] In one embodiment of the present invention, the support housing covers at least one third of the axial length of the motor.

[0040] Such a configuration ensures that at least one-third of the motor's axial length is wrapped by the motor cover, so that the motor cover can provide sufficient support, shock absorption and noise reduction, save space, and meet the small space design under corresponding working conditions, which is further conducive to achieving the shock absorption and noise reduction effects while taking into account the reduction of volume.

[0041] In one embodiment of the utility model, a protrusion structure extending in the axial direction is arranged on an end surface of one end of the support shell, and an accommodating cavity is formed in the protrusion structure, and the accommodating cavity is used to accommodate a bearing of the motor.

[0042] With such arrangement, a protruding structure is formed on the end face of the support shell, and a receiving cavity for accommodating the bearing is formed inside the protruding structure to improve the stability of the motor output shaft. The sealing of the motor sleeve can be improved by sleeve-fitting a rubber sleeve on the protruding structure.

[0043] In one embodiment of the present invention, the protruding structure is provided with a through hole, and the through hole allows the output shaft of the motor to extend out.

[0044] In this way, a through hole that can only accommodate the output shaft is provided on the end surface of the motor sleeve, so as to reduce the exposure of the motor relative to the connection between the inside and the outside of the toothbrush, which is beneficial to improve the sealing performance.

[0045] In one embodiment of the utility model, along the circumference of the protrusion structure, a protrusion protruding outward along the circumferential direction of the protrusion structure is sleeved with an axle core rubber sleeve, and the axle core rubber sleeve cooperates with the protrusion to limit the position.

[0046] In this way, the protrusion is located at the periphery of the raised structure, and the protrusion protrudes outward more than the raised structure as a whole. When the shaft core rubber sleeve is mounted on the raised structure, part of the protrusion can prevent the shaft core rubber sleeve from circumferential rotation, making the connection between the shaft core rubber sleeve and the raised structure more stable, and also helping to improve the sealing effect.

[0047] In one embodiment of the utility model, a connection hole is also provided on the end surface of the support shell provided with the protruding structure, and the connection hole allows a threaded fastener to pass through and connect to the motor to fix the support shell and the motor.

[0048] With such arrangement, the threaded fastener is connected to the motor through the connecting hole, thereby achieving a stable connection between the motor sleeve and the motor as a whole. Screw glue can also be added to the threaded fastener to further prevent the threaded fastener from loosening due to motor vibration, so as to ensure the reliability of its connection.

[0049] In one embodiment of the present invention, at least two clamping parts arranged opposite to each other are arranged on the outer side wall of the supporting shell, and the clamping parts are used to clamp the circuit board.

[0050] In this way, at least two clamping parts arranged opposite to each other are arranged to clamp the circuit board at two different sides, thereby achieving relative fixation of the circuit board.

[0051] In one embodiment of the present invention, at least a portion of the support housing is provided with a plane portion, and the plane portion is used for placing the circuit board.

[0052] In this way, by setting a partial area of ​​the outer wall of the supporting shell as a plane, the circuit board is placed on the plane portion, which is conducive to the stable fixation of the circuit board. The clamping parts are located on both sides of the plane portion to clamp the circuit board on two different sides to fix the circuit board.

[0053] In one embodiment of the present invention, at least one heat dissipation opening is disposed on the outer side wall of the supporting shell.

[0054] In this way, by arranging the heat dissipation opening on the outer side wall, the heat dissipation of the motor is facilitated through the heat dissipation opening, so as to avoid the motor temperature being too high, and to ensure its safety and reliability.

[0055] The utility model further provides a motor assembly, comprising a motor and a motor sleeve as in any one of the above embodiments, wherein the motor sleeve is arranged outside the motor.

[0056] The motor assembly provided by the utility model installs the motor at least partially in the motor sleeve, thereby achieving the purpose of reducing vibration and noise, thereby improving the user's experience.

[0057] The utility model also provides an electric toothbrush, comprising:

[0058] Handle housing;

[0059] A motor is installed in the handle housing, and the motor includes a main body and an output shaft;

[0060] As in any one of the above embodiments, the motor sleeve is arranged outside the motor;

[0061] The brush head is connected to the part of the output shaft located outside the handle housing.

[0062] The electric toothbrush provided by the utility model installs the motor part inside the supporting shell. The supporting shell can ensure its structural strength and play the role of supporting and fixing the motor. The shock absorbing part is formed on the inner wall of the supporting shell and arranged around the outer wall of the motor. At the same time, the elastic property of the shock absorbing part is utilized to buffer the vibration of the motor and reduce noise, so as to reduce the vibration transmitted to the handle shell, thereby reducing the vibration of the user when holding the handle shell, so as to improve the user's experience of use. In addition, by providing the above-mentioned motor cover, the electric toothbrush has good structural stability, which is conducive to the long-term use of the electric toothbrush.

[0063] In one embodiment of the utility model, a receiving cavity is formed in the protruding structure of the motor sleeve, and the receiving cavity is used to receive the bearing of the motor;

[0064] When the motor sleeve is mounted on the motor, the top wall of the motor abuts against the top wall of the motor sleeve where the raised structure is located, and there is a gap between the bearing of the motor and the top wall of the raised structure.

[0065] With such arrangement, during the installation of the motor, the top wall of the motor contacts the top wall of the motor sleeve first, while there is a gap between the motor bearing and the top wall of the raised structure, which makes the top wall of the motor and the top wall of the motor sleeve the first contact surfaces. When the motor and the motor sleeve are installed, there will be no problem of uneven connection surface caused by the motor bearing abutting against the raised structure, thereby improving the stability of the connection between the motor and the motor sleeve; and the motor bearing is arranged not to abut against the raised structure, which can reduce the contact area between the bearing and the support shell, thereby improving the stability of the motor during operation.

[0066] In one embodiment of the present invention, the motor comprises an annular metal piece, and the annular metal piece abuts against a top wall of the motor sleeve where the protruding structure is located.

[0067] With such arrangement, when the threaded fasteners fasten the motor sleeve to the motor, the annular metal piece increases the threaded connection distance of the threaded fasteners, so that the motor and the motor sleeve are fixed more reliably and with better stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0069] Figure 1 The utility model is a schematic diagram of the structure of an electric toothbrush in one embodiment.

[0070] Figure 2 The utility model is a partial cross-sectional structural schematic diagram of an electric toothbrush in one embodiment.

[0071] Figure 3 The figure is a schematic diagram of the matching structure between the motor sleeve and the motor in one embodiment of the utility model.

[0072] Figure 4 The figure is a schematic diagram of the matching structure between the motor cover and the circuit board in one embodiment of the utility model.

[0073] Figure 5 The utility model is a front view schematic diagram of a motor sleeve in one embodiment.

[0074] Figure 6 The utility model is a schematic structural diagram of the shock absorbing part in the motor sleeve in one embodiment.

[0075] Description of labels:

[0076] 100. Electric toothbrush; 10. Handle housing; 20. Motor; 21. Main body; 22. Output shaft; 23. Bearing; 24. Ring-shaped metal part; 30. Motor sleeve; 31. Support housing; 311. Protruding structure; 313. Shaft core rubber sleeve; 317. Clamping part; 318. Plane part; 32. Shock-absorbing part; 321. Ring-shaped part; 322. Strip part; 33. Elastic protrusion; 301. End face; 302. Threaded fastener; 304. Heat dissipation port; 305. Avoidance port; 307. First notch; 40. Circuit board. DETAILED DESCRIPTION

[0077] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0078] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0079] See also Figures 1 to 6As shown, the utility model proposes a motor sleeve, a motor assembly and an electric toothbrush to improve the problem that when the user uses the existing electric toothbrush, the vibration of the motor will be transmitted to the user's hand through the hand-held part of the toothbrush, and the vibration of the motor will also generate noise, thereby interfering with the user and affecting the user's experience. The motor sleeve 30 includes a support shell 31 and a shock absorbing part 32. The support shell 31 is sleeved on the outside of the motor 20, specifically on the outside of the main body 21 of the motor 20, and a accommodating space is formed in the support shell 31. The shock absorbing part 32 is formed on the inner wall of the support shell 31 and is located in the accommodating space. For example, the shock absorbing part 32 can be integrally formed with the support shell 31 by injection molding to be formed on the inner wall of the support shell 31. Of course, the shock absorbing part 32 can also be integrally formed with the support shell 31 by hot pressing, compression molding, rubber coating, etc., so that the shock absorbing part 32 is formed on the inner wall of the support shell 31. The shock absorbing part 32 is made of a different material from the supporting shell 31. The shock absorbing part 32 has higher elasticity and / or flexibility than the supporting shell 31, that is, the shock absorbing part 32 has higher elasticity, or higher flexibility, or higher elasticity and flexibility than the supporting shell 31, and the shock absorbing part 32 contacts the motor 20. The accommodating space of the supporting shell 31 of the motor cover 30 is used to set the motor 20. The supporting shell 31 can ensure a high structural strength, play a role in supporting and fixing the motor 20, and when the motor cover 30 and the motor 20 are installed as a whole, since the supporting shell 31 has a good structural strength, it is also more convenient to install and disassemble the motor cover 30 and the motor 20 as a whole. The shock absorbing part 32 is located in the supporting shell 31, and has higher elasticity and / or flexibility than the supporting shell 31, so that when the motor 20 vibrates, the shock absorbing part 32 can prevent the transmission of vibration, absorb the energy generated by the vibration, and can rebound relatively quickly, so that the motor cover 30 can achieve the purpose of reducing vibration and reducing noise, thereby improving the user's experience; and because the shock absorbing part 32 is formed on the inner wall of the supporting shell 31, the supporting shell 31 and the shock absorbing part 32 have a strong structural stability. When the motor cover 30 is shock absorbing, the shock absorbing part 32 will basically not fall off compared with the prior art. The motor cover 30 combines a good shock absorbing effect and a high structural strength, which is also conducive to improving the service life of the product.

[0080] See also Figure 2 , Figures 5 and 6As shown, the damping part 32 includes an elastic protrusion 33, which contacts the motor 20. For example, the elastic protrusion 33 and the main body 21 of the motor 20 are interference fit, and the elastic protrusion 33 can better absorb and disperse the vibration generated by the motor 20, so that the damping part 32 can better buffer the vibration of the motor 20 and reduce noise, thereby improving the user's experience. In this embodiment, the number of elastic protrusions 33 is set to be multiple, and at least part of the elastic protrusions 33 extend along the axial direction of the support shell 31, and at least part of the elastic protrusions 33 extend along the circumferential direction of the support shell 31, so that the damping part 32 can reduce the vibration of the motor 20 in the axial and circumferential directions, which is more conducive to comprehensively improving the effect of damping and noise reduction. It can be understood that in other embodiments, the number of elastic protrusions 33 can be set to be multiple, and at least part of the elastic protrusions 33 extend along the axial direction of the support shell 31, so that the damping part 32 can reduce the vibration of the motor 20 in the axial direction, which is more conducive to improving the effect of damping and noise reduction. It can also be understood that, in some other embodiments, the number of the elastic protrusions 33 is set to be multiple, and at least part of the elastic protrusions 33 extend along the circumferential direction of the support shell 31, so that the shock absorbing part 32 can reduce the circumferential vibration of the motor 20, which is more conducive to improving the shock absorption and noise reduction effects.

[0081] See also Figure 2 , Figures 5 and 6 As shown, the arrangement density of the plurality of elastic protrusions 33 in the axial direction is greater than that in the circumferential direction, which is beneficial to accurately buffer the vibrations of the motor 20 in different directions. When the motor 20 of the electric toothbrush 100 realizes the vibration of the brush head, the vibration is transmitted more in the axial direction, and the arrangement density of the elastic protrusions 33 in the axial direction is relatively larger to enhance the buffering of the axial vibration, thereby being more beneficial to improving the shock absorption and noise reduction effects of the shock absorbing part 32, and providing a better user experience. Furthermore, the elasticity and / or flexibility of at least some of the elastic protrusions 33 are set to be different, so that in the path or space formed by multiple elastic protrusions 33, different parts have different shock-absorbing effects. Therefore, when the structure of the electric toothbrush 100 is designed, the vibration degree or amplitude of different parts of the motor 20 is different. By adjusting the elasticity and / or flexibility of the corresponding parts of the elastic protrusions 33, precise shock absorption can be achieved, and further better shock absorption effect can be achieved; and the use of the motor cover 30 will make the design of the electric toothbrush 100 no longer restricted, that is, there is no need to excessively consider the impact of vibration imbalance during design, and the motor cover 30 can subsequently achieve better shock absorption and noise reduction purposes, thereby making the electric toothbrush 100 have a higher degree of design freedom.

[0082] See also Figure 2 , Figures 5 and 6As shown, in this embodiment, the shock absorbing part 32 includes a strip part 322, which extends along the axial direction of the support shell 31 and is arranged on the inner wall of the support shell 31 close to the motor 20, and at least part of the elastic protrusion 33 is arranged on the strip part, so that the strip part 322 can effectively reduce the vibration transmission in the axial direction of the motor 20, which is conducive to improving the shock absorption and noise reduction effects. Further, the number of the strip parts 322 can be set to multiple, and multiple strip parts 322 are annular on the inner wall of the support shell 31, that is, multiple strip parts 322 are arranged at intervals along the circumference of the support shell 31, so as to further improve the shock absorption and noise reduction effects of the shock absorbing part 32 in the circumference of the support shell 31. It is understandable that the arrangement density of the elastic protrusions 33 along the axial direction of the support shell 31 can be adjusted by adjusting the number of the elastic protrusions 33 on the strip portion 322, and the arrangement density of the elastic protrusions 33 along the circumferential direction of the support shell 31 can be adjusted by adjusting the number of the strip portions 322, the spacing distance between the strip portions 322, etc. It is also understandable that the elasticity and / or flexibility of the elastic protrusions 33 on the same strip portion 322 can be designed to be different, and the elasticity and / or flexibility of the elastic protrusions 33 on different strip portions 322 can also be designed to be different, so that in the path or space formed by multiple elastic protrusions 33, different parts have different shock absorption effects, so that precise shock absorption can be achieved.

[0083] See also Figure 2 , Figures 5 and 6 As shown, in this embodiment, the shock absorbing portion 32 further includes an annular portion 321, which extends along the circumferential direction of the support shell 31 and is connected to the strip portion 322, and at least part of the elastic protrusion 33 is arranged on the annular portion 321, so that the annular portion 321 can effectively reduce the vibration transmission of the motor 20 in the circumferential direction, which is conducive to improving the shock absorption and noise reduction effect. The annular portion 321 is connected to the strip portion 322, so that the two can jointly perform buffering and noise reduction, thereby making the overall noise reduction and buffering structure more stable. It should be noted that at least part of the strip portion 322, the elastic protrusion 33, the support shell 31 and the annular portion 321 are integrally formed. For example, the strip portion and the elastic protrusion 33 can be set as an integrally formed structure, or the strip portion 322, the annular portion 321 and the support shell 31 can be set as an integrally formed structure, or the strip portion 322, the elastic protrusion 33, the annular portion 321 and the support shell 31 can be set as an integrally formed structure. By setting at least part of the structure as an integrally formed structure, it is beneficial to improve production efficiency and facilitate assembly, and it is beneficial to improve the overall structural strength of the motor cover 30.

[0084] See also Figure 2 , Figures 5 and 6As shown, in this embodiment, one end of the support shell 31 has an opening, and the opening allows the motor 20 to extend into the support shell 31 and contact the shock absorbing portion 32, so that when the motor sleeve 30 and the motor 20 are installed, it is only necessary to extend the end of the motor 20 provided with the output shaft 22 from the opening into the motor sleeve 30 to achieve installation, which is conducive to the convenience of installation between the motor sleeve 30 and the motor 20. Further, the annular portion 321 is provided at one end of the support shell 31 close to the opening, for example, the annular portion 321 is located on the inner wall of one end of the support shell 31 where the opening is provided, so that when the motor sleeve 30 is sleeved with the motor 20, the annular portion 321 can increase the friction between the motor sleeve 30 at the position of the opening and the motor 20, so as to ensure the stability of the connection between the motor sleeve 30 and the motor 20.

[0085] In another embodiment, the shock absorbing part 32 includes a plurality of annular parts 321, each of which extends along the circumferential direction of the support shell 31, and an elastic protrusion 33 is arranged on the annular part 321, and the plurality of annular parts 321 are arranged at intervals along the axial direction of the support shell 31 to further enhance the shock absorption and noise reduction effects of the shock absorbing part. It is understandable that when the shock absorbing part 32 includes a plurality of annular parts 321, an elastic protrusion 33 is arranged on the annular part 321, and the arrangement density of the elastic protrusion 33 along the axial direction and the circumferential direction of the support shell 31 is different, for example, by adjusting the number of elastic protrusions 33 on the annular part 321 to adjust the arrangement density of the elastic protrusion 33 along the circumferential direction of the support shell 31, or by adjusting the number of annular parts 321, the spacing distance between the annular parts 321, etc. to adjust the arrangement density of the elastic protrusion 33 along the axial direction of the support shell 31. It can also be understood that the elasticity and / or flexibility of the elastic protrusions 33 on the same annular portion 321 can be designed to be different, and the elasticity and / or flexibility of the elastic protrusions 33 on different annular portions 321 can also be designed to be different, so that in the path or space formed by multiple elastic protrusions 33, the shock absorption effects of different parts are different, so that precise shock absorption can be achieved. The annular portion, the elastic protrusions 33 and at least part of the support shell 31 are integrally formed. For example, the annular portion 321 and the elastic protrusions 33 can be set as an integrally formed structure, and the annular portion 321 and the support shell 31 can also be set as an integrally formed structure. The elastic protrusions 33, the annular portion 321 and the support shell 31 can also be set as an integrally formed structure, so that by setting at least part of the structure as an integrally formed structure, it is beneficial to improve production efficiency and facilitate assembly, and it is beneficial to improve the overall structural strength of the motor cover 30.

[0086] See also Figure 2 , Figures 5 and 6As shown, an example is taken in which one end of the supporting shell 31 in the motor sleeve 30 has an opening, and the motor sleeve 30 is at least sleeved on a partial area along the axial length of the motor 20: the shock absorbing portion 32 includes an annular portion 321 and a plurality of strip portions 322, and the annular portion 321 is arranged at the opening at one end of the motor sleeve 30, so that when the motor sleeve 30 is sleeved on the motor 20, the annular portion 321 can increase the friction between the motor sleeve opening position and the motor 20 to ensure the stability of the connection between the motor sleeve 30 and the motor 20. The strip portion 322 extends axially along the support shell 31 and is formed on the inner wall of the support shell 31. A plurality of strip portions 322 are arranged at intervals along the circumference of the support shell 31. The strip portion 322 is, for example, configured as soft rubber or other elastic structure, which is arranged around the outer side of the motor 20. By distributing a plurality of axially extending strip portions 322 in the support shell 31 in the circumferential spacing direction, the shock absorbing and noise reduction effects of the shock absorbing portion 32 are further improved in the circumferential direction of the support shell 31.

[0087] See also Figure 2 , Figures 5 and 6 As shown, a plurality of elastic protrusions 33 are arranged on the strip portion 322, for example, the plurality of elastic protrusions 33 are arranged at intervals along the length direction of the strip portion 322, so that the vibration transmission in the axial direction of the motor 20 can be slowed down, which is beneficial to improving the effect of shock absorption and noise reduction. The elastic protrusion 33 is a soft rubber or other elastic structure, which is integrally formed with the strip portion 322. The number of the strip portion 322 is, for example, set to four, one end of the strip portion 322 is fixedly connected to the side of the annular portion 321, and is located on the same side of the annular portion 321, and the four strip portions 322 are spaced apart along the circumferential direction of the support shell 31, so that the vibration transmission in the axial direction of the motor 20 can be slowed down, which is beneficial to improving the effect of shock absorption and noise reduction. Of course, the number of the strip portions 322 can also be set to other numbers or distributed on the inner wall of the support shell 31 in other distribution modes. The annular portion 321 and the strip portion 322 are an integrally formed structure, for example, they can be integrally formed by injection molding, which is beneficial to improving production efficiency and facilitating assembly.

[0088] Taking the case where one end of the support shell 31 in the motor sleeve 30 has an opening and the motor sleeve 30 is at least sleeved on a partial area of ​​the motor 20 along the axial length as an example, the shock absorbing portion 32 includes a plurality of annular portions 321, which are arranged on the inner wall of the support shell 31 at intervals along the axial direction of the support shell 31 to improve the shock absorption and noise reduction effects of the motor sleeve 30. Furthermore, along the circumference of the annular portion 321, a plurality of elastic protrusions 33 are arranged on the annular portion 321 at intervals. By arranging the elastic protrusions 33 on the annular portion 321 extending along the circumferential direction of the support shell 31, the shock absorbing portion 32 can slow down the vibration transmission of the motor 20 in the circumferential direction, which is conducive to improving the shock absorption and noise reduction effects.

[0089] In some other embodiments, the support shell 31 in the motor sleeve 30 is configured to include a first shell and a second shell, and the first shell and the second shell are buckled to cover the motor 20 as an example for explanation: the support shell 31 includes two half shells formed by radial cross-section of the support shell 31, and the two half shells are respectively the first shell and the second shell. At this time, the structure of the first shell and the second shell is the same or similar to the structure of the support shell 31 with an opening at one end described in the above embodiment, and the inner walls of the first shell and the second shell 32 are both formed with a shock absorbing part 32, and the structure of the shock absorbing part 32 is the same or similar to the structure of the shock absorbing part 32 described in the above embodiment. It should be noted that the first shell and the second shell are inserted into the motor 20 from both ends of the axial direction of the motor 20 and buckled to cover the motor 20, and the output shaft 22 of the running motor 20 extends out.

[0090] Of course, the support housing 31 can also be configured to include a first housing and a second housing that are divided into two halves along the axial direction thereof, and the first housing and the second housing are fixedly connected to form a housing space that allows the output shaft 22 of the motor 20 to extend at one end and is closed at the other end. In this case, the first housing and the second housing can be buckled along both radial sides of the motor 20 to cover the motor 20. Preferably, the first housing and the second housing are symmetrical structures, which are fixedly connected to cover the motor 20, and only allow the output shaft 22 of the motor 20 to extend, which is conducive to improving its sealing performance, and the two half housings are also more convenient to assemble with the motor 20, which is conducive to improving the convenience of assembly.

[0091] It is understood that when the support shell 31 is set as the first shell and the second shell divided axially, the damping part 32 is also divided into two half-damper parts. Preferably, the two half-damper parts are set as symmetrical structures, which are respectively arranged in the first shell and the second shell. The half-damper part includes a plurality of strip parts extending along the axial direction of the shell, and the plurality of strip parts are arranged at intervals along the circumference of the first shell or the second shell; it is understood that the half-damper part can also be set to include a plurality of semi-annular parts extending along the circumference of the shell, and the plurality of semi-annular parts are arranged at intervals along the axial direction on the inner wall of the first shell or the second shell. When the first shell and the second shell are fixedly connected, the two semi-annular parts form a complete annular part; it is also understood that the half-damper part can also be set to include a strip part and a semi-annular part, and the plurality of strip parts are arranged at intervals along the circumference of the first shell and the second shell on the inner wall thereof, and the plurality of semi-annular parts are arranged at intervals along the axial direction on the inner wall of the first shell and the second shell. The outer side of the motor 20 is wrapped with the damping part 32, which is more conducive to buffering the vibration of the motor 20 and reducing noise. It should be noted that the strip portion and the annular portion formed by the two semi-annular portions have the same or similar structures as the strip portion and the annular portion described in the above embodiments.

[0092] It can be understood that by snapping the first shell and the second shell together to cover the motor 20, it is beneficial to better protect the motor 20, and it is also beneficial to improve the shock absorption and noise reduction effects, and the first shell and the second shell are also more convenient to assemble with the motor 20.

[0093] See also Figure 2 , Figures 5 and 6 As shown, the support shell 31 is a hard rubber part, the shock absorbing part 32 is a soft rubber part, and the support shell 31 and the shock absorbing part 32 are an integral injection molding structure. The soft rubber and the hard rubber are fixed together by injection molding, which is conducive to improving production efficiency, so that it can avoid the errors caused by assembling the support shell 31 and the shock absorbing part 32 as separate parts, and the relatively soft characteristics of the soft rubber can buffer the vibration of the motor and reduce noise, and the structural strength of the hard rubber can also play a supporting and fixing role. Of course, in some other embodiments, the support shell 31 and the shock absorbing part 32 can be set as two separate parts. In this case, a plurality of grooves (not shown) are provided on the inner wall of the support shell 31 to accommodate the installation strip part. A first notch 307 is provided on the shell wall at one end of the opening of the support shell 31. Correspondingly, a second notch 3211 is also provided at a corresponding position of the annular part provided near the opening of the support shell 31. When the first notch 307 and the second notch 3211 correspond to each other, the support shell 31 and the shock absorbing part 32 are installed, making it easy to identify whether the installation is completed, and further facilitating the operation. It should be noted that on the inner wall of the motor cover 30, the transition part between the soft rubber and the hard rubber is basically smoothly transitioned to further improve the noise reduction and shock absorption effect.

[0094] See also Figure 2 , Figures 5 and 6 As shown, a protrusion structure 311 extending along its axial direction is provided on one end surface 301 of the support shell 31. For example, the protrusion structure 311 is a circular protrusion structure. An accommodating cavity is formed in the protrusion structure 311 to accommodate the bearing 23, thereby improving the stability of the motor output. A core rubber sleeve 313 is also sleeved on the raised structure 311, and the core rubber sleeve 313 is located between the handle housing 10 and the raised structure 311. Since the output shaft 22 of the motor 20 needs to pass through the end of the handle housing 10 to extend to the outside of the handle housing 10 and thus be connected to the brush head, there is a certain gap at the position where the output shaft 22 passes through the handle housing 10. When the core rubber sleeve 313 is sleeved on the raised structure 311, the core rubber sleeve 313 is located between the handle housing 10 and the raised structure 311, and partially wraps the output shaft 22 of the motor 20, so as to improve the sealing effect between the handle housing 10, the motor sleeve 30 and the output shaft 22, and prevent water and other liquids from entering the interior of the motor 20, thereby ensuring its safety and reliability.

[0095] See also Figure 2 , Figures 5 and 6 As shown, a through hole is provided on the end surface 301 of the support shell 31 on which the protruding structure 311 is provided, and the through hole is used to accommodate the output shaft 22 of the motor 20 to extend, that is, the end of the motor sleeve 30 on which the protruding structure 311 is provided is only provided with a through hole for accommodating the output shaft 22 to pass through, so as to reduce the exposure of the motor 20 relative to the connection between the inside and the outside of the toothbrush, which is beneficial to improve the overall sealing of the motor relative to the external environment.

[0096] See also Figure 2 , Figures 5 and 6 As shown, along the circumference of the protruding structure 311, a plurality of outwardly protruding bumps (not shown) are arranged on the outer circumference of the protruding structure 311. When the shaft core rubber sleeve 313 is sleeved on the protruding structure 311, a limit can be generated between the bump and the shaft core rubber sleeve 313 to limit the circumferential rotation of the shaft core rubber sleeve 313. Specifically, the bump is located at the periphery of the protruding structure 311. Along its radial direction, the bump as a whole protrudes more outward than the outer circumferential surface of the protruding structure 311, so that when the shaft core rubber sleeve 313 is sleeved on the protruding structure 311, part of the bump can prevent the circumferential rotation of the shaft core rubber sleeve 313, so that the connection between the shaft core rubber sleeve 313 and the protruding structure 311 is more stable, which is beneficial to improving the sealing effect.

[0097] See also Figure 2 , Figures 5 and 6 As shown, when the motor cover 30 is sleeved on the motor 20, the motor cover 30 is fixedly connected to the motor 20 by the threaded fastener 302. Specifically, a connection hole is provided on the end surface 301 of the support housing 31 provided with the protruding structure 311, and the threaded fastener 302 passes through the connection hole and is threadedly connected to the main body 21 of the motor 20 to achieve a solid connection between the motor cover 30 and the motor 20 as a whole. Furthermore, screw glue can be added to the threaded fastener 302 to further prevent the threaded fastener 302 from loosening due to the vibration of the motor 20, thereby ensuring the reliability of its connection.

[0098] See also Figure 2 , Figures 5 and 6As shown, since the threaded fastener 302 is located on the end face 301 of the support shell 31, the existence of the protruding structure 311 may affect the installation of the threaded fastener 302, for example, interfere with the threaded fastener 302 and affect the fastening connection between the motor sleeve 30 and the motor 20. Therefore, an avoidance groove (not shown) is provided on the outer circumferential surface of the protruding structure 311. The avoidance groove is formed by being recessed radially inwardly along the protruding structure 311, and the avoidance groove corresponds to the connecting hole one by one to avoid each threaded fastener 302. The avoidance groove is provided to avoid the threaded fastener 302 connecting the motor sleeve 30 and the motor 20. The avoidance groove can also facilitate the disassembly and assembly operations of the shaft core rubber sleeve 313, thereby improving the assembly efficiency.

[0099] See also Figure 2 , Figures 5 and 6 As shown, the accommodating cavity formed in the protruding structure 311 is used to accommodate the bearing 23 of the motor 20. When the motor sleeve 30 is sleeved with the motor 20, the top wall of the motor 20 abuts against the top wall where the protruding structure 311 of the motor sleeve 30 is located, that is, the top wall of the motor 20 abuts against the end face 301 of the motor sleeve 30, and there is a gap between the bearing 23 of the motor 20 and the top wall of the protruding structure 311, so that during the installation process of the motor 20, the top wall of the motor 20 contacts the top wall of the motor sleeve 30 first, and the bearing 23 of the motor 20 contacts the protruding structure 311. 1, which makes the top wall of the motor 20 and the top wall of the motor cover 30 the first contact surface. When the motor 20 and the motor cover 30 are installed, there will be no problem of uneven connection surface caused by the bearing 23 of the motor 20 abutting against the protruding structure 311, thereby improving the stability of the connection between the motor 20 and the motor cover 30; and the bearing 23 of the motor 20 is set not to abut against the protruding structure 311, which can reduce the contact area between the bearing 23 and the support shell 31, thereby improving the stability of the motor 20 during operation. The motor 20 also includes an annular metal part 24, which abuts against the top wall where the protruding structure 311 of the motor sleeve 30 is located, that is, the annular metal part 24 abuts against the end face 301 of the motor sleeve 30, and the threaded fastener 302 passes through the connecting hole and the annular metal part 24 in sequence, and is threadedly connected to the motor 20, so that when the threaded fastener 302 fastens the motor sleeve 30 to the motor 20, the annular metal part 24 increases the threaded connection distance of the threaded fastener 302, so that the fixation between the motor 20 and the motor sleeve 30 is more reliable and has better stability.

[0100] See also Figure 2 , Figures 3 to 6As shown, at least two clamping parts 317 arranged opposite to each other are arranged on the outer wall of the support shell 31, and the clamping parts 317 are used to clamp the circuit board 40, so as to achieve relative fixation of the circuit board 40. For example, the circuit board 40 is a long strip-shaped circuit board, and the circuit board 40 is at least partially installed on the outer wall of the motor cover 30. The circuit board 40 is clamped on two different sides of the long strip-shaped circuit board through two clamping parts 317 arranged opposite to each other, so as to achieve relative fixation of the circuit board 40. Further, a plane part 318 is arranged on at least part of the support shell 31, and the plane part 318 is used to place the circuit board 40. Specifically, the clamping parts 317 are located on both sides of the plane part 318. The circuit board 40 is placed on the plane part 318, and is clamped on two different sides of the circuit board 40 through the clamping parts 317 located on both sides of the plane part 318 to achieve fixation. The plane part 318 is conducive to the fixation of the circuit board 40. Of course, in some other embodiments, in order to enhance the stability of the circuit board 40 , the number of the clamping portions 317 may be greater than two, as long as at least two different sides of the circuit board 40 can be clamped and fixed.

[0101] See also Figure 2 , Figures 5 and 6 As shown, at least one heat dissipation port 304 is provided on the outer wall of the support shell 31, and the heat dissipation port 304 is conducive to the heat dissipation of the motor 20 to avoid the motor temperature being too high, which is conducive to ensuring its safety and reliability. In the present embodiment, the heat dissipation port 304 is rectangular and is located at the plane portion 318. In other embodiments, the heat dissipation port 304 may also be of other shapes, and the specific position and number can be designed as needed. Correspondingly, a avoidance port 305 is provided on the shock absorbing portion 32 on the inner side of the support shell 31, and the avoidance port 305 is arranged corresponding to the heat dissipation port 304 to avoid the heat dissipation port 304, thereby avoiding the shock absorbing portion 32 from blocking or covering the heat dissipation port 304, thereby avoiding affecting the heat dissipation of the motor 20.

[0102] See also Figure 2 , Figures 5 and 6 As shown, in this embodiment, along the axial direction of the motor 20, the support housing 31 is at least sleeved over one-third of the axial length of the motor 20, and by ensuring that at least one-third of the axial length of the motor 20 is wrapped by the motor housing 30, the motor housing 30 can play a sufficient supporting, shock absorbing and noise reducing role, and save space, meet the small space design under the corresponding working conditions, and further facilitate the reduction of volume while meeting the shock absorbing and noise reducing effects. In some other embodiments, the support housing 31 is at least sleeved over one-half of the axial length of the main body 21 to further enhance the supporting role of the motor housing 30 on the motor 20 and the shock absorbing and noise reducing role.

[0103] See also Figure 2 , Figures 5 and 6As shown, the utility model further proposes a motor cover 30, which includes a support shell 31 and a shock absorbing part 32. The support shell 31 is sleeved on the motor 20, and an accommodating space is formed in the support shell 31. The shock absorbing part 32 is formed on the inner wall of the support shell 31 close to the motor 20 and is located in the accommodating space. The support shell 31 and the shock absorbing part 32 are made of different materials. The support shell 31 has higher stiffness and / or hardness than the shock absorbing part 32, and the shock absorbing part 32 contacts the motor 20. The accommodating space of the support shell 31 of the motor cover 30 is used to set the motor 20. The support shell 31 can ensure a high structural strength, play the role of supporting and fixing the motor 20, and when the motor cover 30 and the motor 20 are installed as a whole, the support shell 31 has a higher rigidity and / or hardness than the shock absorbing part 32, that is, the support shell 31 has a higher rigidity, or has a higher hardness, or has a higher rigidity and hardness than the shock absorbing part 32, so that it has better structural strength and is more convenient for the overall installation and disassembly of the motor cover 30 and the motor 20; the shock absorbing part 32 is located at the support In the housing 31, when the motor 20 vibrates, the shock absorbing part 32 can prevent the transmission of vibration, absorb the energy generated by the vibration, and can rebound relatively quickly, so that the motor cover 30 can achieve the purpose of reducing the vibration and reducing noise, and improve the user's experience; and because the shock absorbing part 32 is formed on the inner wall of the supporting housing 31, the supporting housing 31 and the shock absorbing part 32 have a strong structural stability. When the motor cover 30 is damped, the shock absorbing part 32 will basically not fall off compared to the prior art. The motor cover 30 combines a good shock absorbing effect and a high structural strength, which is also conducive to improving the service life of the product. It can be understood that the structure of the shock absorbing part 32 is the same or similar to the structure of the shock absorbing part 32 described in the above embodiment.

[0104] See also Figures 1 to 6 As shown, the utility model also proposes a motor assembly, which includes a motor 20 and a motor cover 30, and the motor cover 30 is sleeved outside the motor 20. It should be noted that the structure of the motor cover 30 is the same or similar to that of the motor cover 30 described in the above embodiment, and in order to avoid repetition, it will not be repeated here. It can be understood that the motor assembly provided by the utility model installs the motor 20 at least partially in the motor cover 30, so as to achieve the purpose of reducing vibration and reducing noise, thereby improving the user's experience.

[0105] See also Figures 1 to 6As shown, the utility model also proposes an electric toothbrush 100, which includes a handle housing 10, a motor 20, a motor sleeve 30 and a brush head. The motor 20 includes a main body 21 and an output shaft 22. The motor sleeve 30 is sleeved on the outside of the main body 21 of the motor 20 and installed inside the handle housing 10. The output shaft 22 passes through the end surface 301 of the motor sleeve 30 and the handle housing 10 in sequence to extend to the outside of the handle housing 10. The brush head is connected to the part of the output shaft 22 located outside the handle housing 10. The brush head is driven to vibrate by the motor 20 to achieve cleaning of the teeth. The motor sleeve 30 plays a role in supporting and fixing the motor 20, and the motor sleeve 30 can play a role in reducing the vibration transmitted to the handle housing 10, thereby reducing the vibration of the user when holding the handle housing 10, so as to improve the user's experience and play a role in reducing vibration and noise, which is conducive to improving the user's experience. It should be noted that the structure of the motor sleeve 30 is the same or similar to that of the motor sleeve 30 described in the above embodiment. In order to avoid repetition, it will not be repeated here. It can be understood that the electric toothbrush 100 provided by the utility model installs part of the motor 20 inside the supporting shell 31. The supporting shell 31 can ensure its structural strength and play the role of supporting and fixing the motor 20. The shock absorbing part 32 is formed on the inner wall of the supporting shell 31 and arranged around the outer wall of the motor 20. At the same time, the elastic property of the shock absorbing part 32 is utilized to buffer the vibration of the motor 20 and reduce noise, so as to reduce the vibration transmitted to the handle shell 10, thereby reducing the vibration of the user when holding the handle shell 10, so as to improve the user's experience. In addition, by setting the above-mentioned motor cover 30, the electric toothbrush 100 has good structural stability, which is conducive to the long-term use of the electric toothbrush 100.

[0106] The utility model proposes a motor sleeve, a motor assembly and an electric toothbrush, wherein the motor part is installed inside the support shell, the support shell is made of hard material, which can ensure its structural strength, and play the role of supporting and fixing the motor. The shock-absorbing part is formed on the inner wall of the support shell and arranged around the outer wall of the motor. At the same time, the shock-absorbing part and the elastic protrusion have elastic characteristics to buffer the vibration of the motor and reduce noise, so as to reduce the vibration transmitted to the handle shell, thereby reducing the vibration of the user when holding the handle shell, so as to improve the user's use experience. At the same time, the motor sleeve can be easily installed, strengthen the stability of the internal structure, realize multiple functions through a simple structure, and is conducive to the miniaturization of the electric toothbrush.

[0107] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope involved in the present application is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the concept of the utility model, such as a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

[0108] Except for the technical features described in the specification, the other technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present utility model, the other technical features will not be described in detail here.

Claims

1. A motor cover, characterized in that: include: A support shell is sleeved on the motor, and a receiving space is formed in the support shell; The shock absorbing part is formed on the inner wall of the supporting shell close to the motor and is located in the accommodating space. The supporting shell and the shock absorbing part are made of different materials. The shock absorbing part has higher elasticity and / or flexibility than the supporting shell, and the shock absorbing part contacts the motor.

2. A motor cover, characterized in that: include: A support shell is sleeved on the motor, and a receiving space is formed in the support shell; The shock absorbing part is formed on the inner wall of the support shell close to the motor and is located in the accommodating space. The support shell and the shock absorbing part are made of different materials. The support shell has higher rigidity and / or hardness than the shock absorbing part, and the shock absorbing part contacts the motor.

3. The motor cover according to claim 1 or 2, characterized in that: The shock absorbing portion includes an elastic protrusion, the elastic protrusion contacts the motor, there are multiple elastic protrusions, and at least part of the elastic protrusions extend along the axial direction of the support shell and / or the circumferential direction of the support shell.

4. The motor cover according to claim 3, characterized in that: The arrangement density of the plurality of elastic protrusions in the axial direction is greater than the arrangement density in the circumferential direction.

5. The motor cover according to claim 3, characterized in that: At least some of the elastic protrusions have different degrees of elasticity and / or flexibility.

6. The motor cover according to claim 3, characterized in that: The elastic protrusion and the supporting shell are integrally formed.

7. The motor cover according to claim 1 or 2, characterized in that: The supporting shell includes a first shell and a second shell, and the first shell is buckled with the second shell and covers the motor.

8. The motor cover according to claim 1 or 2, characterized in that: The support shell covers at least one third of the motor's axial length.

9. The motor cover according to claim 1 or 2, characterized in that: A protruding structure extending in the axial direction is arranged on an end surface of one end of the support shell, and a receiving cavity is formed in the protruding structure, and the receiving cavity is used to receive a bearing of the motor.

10. The motor cover according to claim 9, characterized in that: The protruding structure is provided with a through hole, and the through hole allows the output shaft of the motor to extend out.

11. The motor cover according to claim 9, characterized in that: A connecting hole is also provided on the end surface of the support shell provided with the protruding structure, and the connecting hole allows a threaded fastener to pass through and connect to the motor, so as to fix the support shell and the motor.

12. The motor cover according to claim 1 or 2, characterized in that: At least two clamping parts arranged opposite to each other are arranged on the outer side wall of the supporting shell, and the clamping parts are used for clamping the circuit board.

13. The motor cover according to claim 12, characterized in that: At least a portion of the support shell is provided with a plane portion, and the plane portion is used for placing a circuit board.

14. The motor cover according to claim 1 or 2, characterized in that: At least one heat dissipation opening is arranged on the outer side wall of the supporting shell.

15. A motor assembly, characterized in that: include: A motor and a motor cover as claimed in any one of claims 1 to 14, wherein the motor cover is arranged outside the motor.

16. An electric toothbrush, characterized in that: include: Handle housing; A motor, which is installed in the handle housing, and the motor includes a main body and an output shaft; The motor sleeve according to any one of claims 1 to 14, wherein the motor sleeve is arranged outside the motor; A brush head is connected to the portion of the output shaft located outside the handle housing.

17. The electric toothbrush according to claim 16, characterized in that: A receiving cavity is formed in the raised structure of the motor sleeve, and the receiving cavity is used to receive the bearing of the motor; When the motor sleeve is sleeved with the motor, the top wall of the motor abuts against the top wall of the motor sleeve where the protruding structure is located, and there is a gap between the bearing of the motor and the top wall of the protruding structure.

18. The electric toothbrush according to claim 17, characterized in that The motor comprises an annular metal piece, and the annular metal piece abuts against a top wall of the motor sleeve where the protruding structure is located.

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