Motor and electric toothbrush

Abstract

The utility model discloses a motor and an electric toothbrush. The motor comprises a shell, a motor shaft and a translation driving assembly. The motor shaft is at least partially arranged in the shell. The translation driving assembly comprises a first stator and a first rotor, the first stator is installed in the shell and fixed relative to the shell, the first stator comprises a first coil and a first magnetic part, the first coil is connected with the first magnetic part, the first rotor is installed in the shell and fixedly installed on the motor shaft, the first rotor comprises a second magnetic part, and the second magnetic part is connected with the first coil. In the direction perpendicular to the axis of the motor shaft, at least part of the second magnetic piece corresponds to the first magnetic piece, a magnetic field generated by energization of the first coil and a magnetic field generated by the second magnetic piece are mutually coupled to generate translation driving force, and when the energization direction of the first coil changes, the second magnetic piece drives the motor shaft to do reciprocating translation along the axis of the motor shaft. And under the condition that the first coil is powered off, the magnetic attraction force between the first magnetic piece and the second magnetic piece drives the motor shaft to reset.

Description

Technical Field

[0001] The present application relates to the technical field of electric toothbrushes, and more specifically, to a motor and an electric toothbrush. Background Art

[0002] At present, the application of electric toothbrushes has become more and more widespread. Electric toothbrushes use the rapid rotation or vibration of the motor core to make the brush head vibrate at high frequency, instantly breaking down the toothpaste into fine foam, which is inserted into the teeth to clean. At the same time, the vibration of the bristles can promote blood circulation in the oral cavity and have a massage effect on the gum tissue. The current motor can realize the rotation and telescopic movement of the motor shaft. The motor shaft can drive the brush head to rotate and telescope, so that the brush head can clean the oral cavity in an all-round way. When the motor shaft is in telescopic movement, the motor shaft needs to be reset. However, the current reset structure of the motor shaft is relatively complex and has a large volume, which is not conducive to the miniaturization of the motor. Utility Model Content

[0003] The embodiments of the present application provide a motor and an electric toothbrush, which are at least used to solve the problem that the current motor shaft reset structure is relatively complex and has a large volume.

[0004] The motor of the embodiment of the present application includes a housing, a motor shaft and a translational drive assembly. The motor shaft is at least partially arranged in the housing. The translational drive assembly includes a first stator and a first mover, the first stator is installed in the housing and fixed relative to the housing, the first stator includes a first coil and a first magnetic member, the first coil is connected to the first magnetic member, the first mover is installed in the housing and fixedly installed on the motor shaft, the first mover includes a second magnetic member, in the direction perpendicular to the axis of the motor shaft, at least part of the second magnetic member corresponds to the first magnetic member, the magnetic field generated by the first coil being energized and the magnetic field generated by the second magnetic member are coupled to each other to generate a translational drive force, when the energization direction of the first coil changes, the second magnetic member drives the motor shaft to reciprocate and translate along the axis of the motor shaft, when the first coil is de-energized, the magnetic attraction between the first magnetic member and the second magnetic member drives the motor shaft to reset.

[0005] In some embodiments, the shell includes a first end and a second end relative to each other, and the translational drive assembly is installed on the first end of the shell; the motor also includes a shock absorber, which is fixedly mounted on the motor shaft and located between the first mover and the first end of the shell.

[0006] In some embodiments, the first magnetic members include two, and in the axial direction of the motor shaft, the two first magnetic members are respectively disposed at opposite ends of the first coil.

[0007] In some embodiments, there is one second magnetic member, which is sleeved on the motor shaft, and in the axial direction perpendicular to the motor shaft, at least a portion of one second magnetic member corresponds to the first magnetic member.

[0008] In some embodiments, the first magnetic parts include two, and the two first magnetic parts are arranged at opposite ends of the first coil in the axial direction of the motor shaft; the second magnetic parts include two, and the two second magnetic parts are both sleeved on the motor shaft, and the first mover also includes an iron core, and the iron core is sleeved on the motor shaft. In the axial direction of the motor shaft, the two second magnetic parts are respectively located at opposite ends of the iron core and correspond to the two first magnetic parts respectively.

[0009] In some embodiments, the second magnetic member is a single body structure.

[0010] In some embodiments, the second magnetic member includes a plurality of magnetic tiles, and the plurality of magnetic tiles are distributed along the circumference of the motor shaft.

[0011] In some embodiments, the motor further includes a limit assembly, which is installed in the housing and fixed relative to the housing, and is connected to an end of the first stator, and is used to limit the position of the first stator in the axial direction of the motor shaft.

[0012] In some embodiments, the shell includes a first end and a second end relative to each other, and the translational drive assembly is installed on the first end of the shell; the limiting assembly includes a first limiting member, and the first limiting member is arranged between the first end of the shell and the first stator, or the first limiting member is arranged between the first stator and the second end of the shell.

[0013] In some embodiments, the shell includes a first end and a second end relative to each other, and the translational drive assembly is installed on the first end of the shell; the limiting assembly includes a first limiting member and a second limiting member, the first limiting member is arranged between the first end and the first stator, and the second limiting member is arranged between the first stator and the second end of the shell.

[0014] In some embodiments, the first stator further includes a cushion block, which is fixedly installed in the housing, and the cushion block and the limiting assembly together limit the position of the first magnetic component in the axial direction of the motor shaft.

[0015] In some embodiments, the motor further includes a limiting component, which is mounted on the motor shaft and connected to an end of the first mover, and is used to limit a position of the first mover in an axial direction of the motor shaft.

[0016] In some embodiments, the shell includes a first end and a second end relative to each other, the translation drive assembly is installed on the first end of the shell, the first mover includes a first end and a second end relative to each other, and the first end of the first mover is closer to the first end of the shell than the second end of the first mover; the limiting assembly includes a first limiting member, and the first limiting member is connected to the first end of the first mover.

[0017] In some embodiments, the shell includes a first end and a second end relative to each other, the translation drive assembly is installed on the first end of the shell, the first mover includes a first end and a second end relative to each other, and the first end of the first mover is closer to the first end of the shell than the second end of the first mover; the limiting assembly includes a first limiting member and a second limiting member, the first limiting member is connected to the first end of the first mover, and the second limiting member is connected to the second end of the first mover.

[0018] In some embodiments, the shell includes a first end and a second end relative to each other, and the translational drive assembly is installed at the first end of the shell; the motor also includes a rotational drive assembly, and the rotational drive assembly and the translational drive assembly are arranged in sequence in the axial direction of the motor shaft, and the rotational drive assembly is installed at the second end of the shell, and the rotational drive assembly includes a second stator and a second mover, the second stator is installed in the shell, and the shell is relatively fixed, the second mover is installed in the shell and fixedly installed on the motor shaft, the magnetic field generated by the second stator when it is energized and the magnetic field generated by the second mover are coupled with each other to generate a rotational driving force, and when the energization direction of the second stator changes, the second mover drives the motor shaft to rotate forward and reverse around the axis of the motor shaft.

[0019] In some embodiments, the second stator includes a second coil, the second mover includes a third magnetic component, the third magnetic component is fixedly connected to the motor shaft, the second coil surrounds the second mover, the magnetic field generated by the second coil being energized is coupled with the magnetic field of the third magnetic component to generate the rotational driving force, and when the energization direction of the second coil changes, the direction of the rotational driving force also changes, and the motor shaft is driven to rotate forward and reverse around the axis of the motor shaft through the third magnetic component.

[0020] In some embodiments, the motor also includes a first bearing and a second bearing. In the direction from the first end of the shell to the second end of the shell, the first bearing, the translational drive assembly, the rotational drive assembly and the second bearing are arranged in sequence, and the first bearing, the translational drive assembly, the rotational drive assembly and the second bearing are all sleeved on the motor shaft.

[0021] The electric toothbrush according to the embodiment of the present application includes the motor described in the above embodiment.

[0022] In the motor and electric toothbrush of the embodiment of the present application, the magnetic field generated by the first coil being energized and the magnetic field generated by the second magnetic part are coupled to each other to generate a translational driving force. When the energizing direction of the first coil changes, the second magnetic part drives the motor shaft to move back and forth along the axis of the motor shaft. When the first coil is de-energized, the magnetic attraction between the first magnetic part and the second magnetic part drives the motor shaft to reset. The present application uses the magnetic force between the first magnetic part and the second magnetic part to reset the motor shaft. The reset structure of the motor shaft is relatively simple, and the volume of the first magnetic part and the second magnetic part is small, so the volume of the motor is small, which is conducive to miniaturization of the motor.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 is a three-dimensional schematic diagram of a motor according to certain embodiments of the present application;

[0026] Figure 2 yes Figure 1 A cross-sectional schematic diagram of a motor;

[0027] Figure 3 yes Figure 1 A three-dimensional schematic diagram of the motor;

[0028] Figure 4 It is a three-dimensional schematic diagram of an electric toothbrush according to certain embodiments of the present application.

[0029] Description of main component symbols:

[0030] 1000, electric toothbrush; 100, motor; 300, brush handle; 500, brush head; 10, shell; 11, first end of shell; 13, second end of shell; 20, motor shaft; 30, translation drive assembly; 31, first stator; 311, first coil; 313, first magnetic member; 315, cushion block; 33, first mover; 331, second magnetic member; 333, iron core; 335, first end of first mover; 337, second end of first mover; 40, shock absorbing member; 50, limit assembly; 51, first limit member; 53, second limit member; 60, first bearing; 70, limit assembly; 71, first limit member; 73, second limit member; 80, second bearing; 90, rotation drive assembly; 91, second stator; 93, second mover. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship.

[0033] The orientations or positional relationships shown in the drawings are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0038] At present, the application of electric toothbrushes has become more and more widespread. Electric toothbrushes make the brush head vibrate at high frequency through the rapid rotation or vibration of the motor core, which instantly breaks down the toothpaste into fine foam and extends into the teeth to clean. At the same time, the vibration of the bristles can promote blood circulation in the oral cavity and have a massage effect on the gum tissue. The current motor can realize the rotation and telescopic movement of the motor shaft. The motor shaft can drive the brush head to rotate and retract, so that the brush head can clean the oral cavity in an all-round way. When the motor shaft is in telescopic movement, the motor shaft needs to be reset. However, the current reset structure of the motor shaft is relatively complex and has a large size, which is not conducive to the miniaturization of the motor. In order to solve this problem, the embodiment of the present application provides a motor 100( Figure 1 ) and electric toothbrush 1000 ( Figure 4 shown).

[0039] See also Figure 1 and Figure 2The motor 100 of the embodiment of the present application includes a housing 10, a motor shaft 20 and a translation drive assembly 30. The motor shaft 20 is at least partially disposed in the housing 10. The translational drive assembly 30 includes a first stator 31 and a first mover 33. The first stator 31 is installed in the housing 10 and is relatively fixed to the housing 10. The first stator 31 includes a first coil 311 and a first magnetic member 313. The first coil 311 is connected to the first magnetic member 313. The first mover 33 is installed in the housing 10 and fixedly installed on the motor shaft 20. The first mover 33 includes a second magnetic member 331. In the axial direction X perpendicular to the motor shaft 20, at least a portion of the second magnetic member 331 corresponds to the first magnetic member 313. The magnetic field generated by the first coil 311 being energized and the magnetic field generated by the second magnetic member 331 are coupled with each other to generate a translational driving force. When the energization direction of the first coil 311 changes, the second magnetic member 331 drives the motor shaft 20 to reciprocate along the axis of the motor shaft 20. When the first coil 311 is powered off, the magnetic attraction between the first magnetic member 313 and the second magnetic member 331 drives the motor shaft 20 to reset.

[0040] Specifically, please combine Figure 4 The motor 100 of the present application is applied to an electric toothbrush 1000, and the motor 100 is used to drive the brush head 500 of the electric toothbrush 1000 to vibrate, so that the electric toothbrush 1000 can clean the oral cavity. Among them, the electric toothbrush 1000 is a device for cleaning the oral cavity. The electric toothbrush 1000 includes a detachable brush handle 300 and a brush head 500. The brush handle 300 is a structure for the user to hold. The motor 100 is installed in the housing 10 of the brush handle 300, and the motor 100 is one of the components constituting the brush handle 300. Functional modules such as a control area and an interactive area can be set on the surface of the brush handle 300 to facilitate the user to operate and use various functions of the electric toothbrush 1000. The brush handle 300 is generally a cylindrical structure so that the user's grip feels more comfortable. Preferably, the brush handle 300 may also have an anti-slip structure to prevent the electric toothbrush 1000 from slipping from the hand during use. The brush head 500 is a structure for cleaning teeth by vibration. The brush head 500 is connected to the motor 100 in the brush handle 300, and the motor 100 is used to drive the brush head 500 to vibrate. During the process of brushing teeth, the brush head 500 can instantly break down the toothpaste into foam through high-frequency vibration, and can deeply clean the tooth surface and the gaps between teeth to achieve a better cleaning effect.

[0041] The motor 100 includes but is not limited to a linear motor 100, a rotary motor 100, and a composite motor 100. Wherein, when the motor 100 is a linear motor 100, the motor shaft 20 can reciprocate along the axis direction X of the motor shaft 20 relative to the housing 10. At least part of the motor shaft 20 extends from the housing 10, and the brush head 500 is connected to one end of the motor shaft 20 extending from the housing 10. The motor shaft 20 can drive the brush head 500 to reciprocate along the axis direction X of the motor shaft 20, so that the brush head 500 can produce an axial vibration effect, and the brush head 500 has a better cleaning effect on the oral cavity. When the motor 100 is a rotary motor 100, the motor shaft 20 can rotate forward and reverse around the axis of the motor shaft 20 relative to the housing 10, so that the motor shaft 20 can drive the brush head 500 to rotate forward and reverse around the axis of the motor shaft 20, and the brush head 500 can produce a circumferential vibration effect, and the brush head 500 has a better cleaning effect on the oral cavity. In the case where the motor 100 is a composite motor 100, on the one hand, the motor shaft 20 can reciprocate along the axial direction X of the motor shaft 20 relative to the housing 10, so that the motor shaft 20 can drive the brush head 500 to reciprocate along the axial direction X of the motor shaft 20, and the brush head 500 can produce an axial vibration effect. On the other hand, the motor shaft 20 can also rotate forward and reverse around the axis of the motor shaft 20 relative to the housing 10, so that the motor shaft 20 can drive the brush head 500 to rotate forward and reverse around the axis of the motor shaft 20, and the brush head 500 can also produce a circumferential vibration effect. In this way, the motor shaft 20 can drive the brush head 500 to perform axial and circumferential composite vibrations, the brush head 500 can achieve all-round cleaning of the oral cavity, and the cleaning effect of the electric toothbrush 1000 is better. The motor 100 of the embodiment of the present application is a composite motor 100.

[0042] See also Figures 1 to 3 The housing 10 is used to install the motor shaft 20, the first stator 31 and the first mover 33 and other components. The housing 10 can protect the components installed inside. The housing 10 includes a first end and a second end opposite to each other. When the brush handle 300 is connected to the brush head 500, the first end 11 of the housing 10 is closer to the brush head 500 than the second end 13 of the housing 10. The material of the housing 10 includes but is not limited to metal materials or non-metal materials, wherein the metal materials include but are not limited to aluminum, iron, steel or aluminum alloy, and the non-metal materials include but are not limited to plastics. In one example, the housing 10 can be made of metal materials and non-metal materials, thereby making the structural strength of the housing 10 higher, preventing the housing 10 from being damaged during the operation of the motor 100, and improving the stability and reliability of the motor 100. In another example, the housing 10 can be made of non-metal materials, thereby making the weight of the housing 10 lighter, which is conducive to achieving the lightness of the motor 100 and the electric toothbrush 1000.

[0043] See also Figure 2 and Figure 3The translation drive assembly 30 is a structure for driving the motor shaft 20 to reciprocate relative to the housing 10 along the axial direction X of the motor shaft 20. The translation drive assembly 30 is installed in the housing 10 and is located at the first end 11 of the housing 10. The motor shaft 20 includes a first end and a second end opposite to each other. The first end of the motor shaft 20 extends from the first end 11 of the housing 10, and the brush head 500 is connected to the first end of the motor shaft 20. The reciprocating translation of the motor shaft 20 along the axial direction X of the motor shaft 20 means that the motor shaft 20 moves from the second end 13 of the housing 10 to the first end 11 of the housing 10 relative to the initial position, that is, the first end of the motor shaft 20 moves in the axial direction X of the motor shaft 20 away from the first end 11 of the housing 10. Thereafter, the motor shaft 20 moves again in the direction from the first end 11 of the housing 10 to the second end 13 of the housing 10, that is, the first end of the motor shaft 20 moves in the axial direction X of the motor shaft 20 close to the first end 11 of the housing 10. Thus, the motor shaft 20 can drive the brush head 500 to reciprocate along the axial direction X of the motor shaft 20, and the brush head 500 can produce an axial vibration effect. The initial position here refers to: the position of the motor shaft 20 relative to the housing 10 when the motor shaft 20 does not move or rotate. At this time, the brush head 500 is also in the original position (the position of the brush head 500 relative to the brush handle 300 when the brush head 500 does not move or rotate). Exemplarily, after the motor shaft 20 moves 3mm from the second end 13 of the housing 10 to the first end 11 of the housing 10 relative to the initial position, the motor shaft 20 moves 3mm from the first end 11 of the housing 10 to the second end 13 of the housing 10 relative to the initial position. By repeatedly moving in this way, the motor shaft 20 can realize reciprocating translation along the axial direction X of the motor shaft 20, and the motor shaft 20 can drive the brush head 500 to vibrate in the axial direction.

[0044] See also Figure 2 and Figure 3, the first stator 31 is fixed relative to the housing 10, and the first mover 33 can move relative to the housing 10. The first stator 31 cooperates with the first mover 33 so that the first mover 33 can drive the motor shaft 20 to move back and forth relative to the housing 10. The first coil 311 can generate a magnetic field when it is energized, and the second magnetic member 331 itself is magnetic. The magnetic field of the first coil 311 interacts with the magnetic field of the second magnetic member 331 to generate a driving force. The driving force can drive the second magnetic member 331 to move along the axial direction X of the motor shaft 20. Since the second magnetic member 331 is fixedly connected to the motor shaft 20, the second magnetic member 331 can drive the motor shaft 20 to move along the axial direction X of the motor shaft 20. When the direction of the current in the first coil 311 changes, the direction of the magnetic field of the first coil 311 will change. Exemplarily, when the first coil 311 is supplied with current in the first direction, the driving force generated by the interaction between the magnetic field of the first coil 311 and the magnetic field of the second magnetic member 331 can cause the second magnetic member 331 to drive the motor shaft 20 to move in the direction from the second end 13 of the housing 10 to the first end 11 of the housing 10. When the first coil 311 is supplied with current in the second direction, the driving force generated by the interaction between the magnetic field of the first coil 311 and the magnetic field of the second magnetic member 331 can cause the second magnetic member 331 to drive the motor shaft 20 to move in the direction from the first end 11 of the housing 10 to the second end 13 of the housing 10. The first direction is opposite to the second direction. In this way, by changing the direction of power supply of the first coil 311, the first coil 311 can form an alternating magnetic field, and the second magnetic member 331 can achieve reciprocating movement in the magnetic field, so that the motor shaft 20 can reciprocate and translate along the axial direction X of the motor shaft 20.

[0045] The first mover 33 of the present application is sleeved on the motor shaft 20, and the first stator 31 surrounds the first mover 33. On the one hand, with such a design, the arrangement of the components in the motor 100 is relatively compact, thereby saving a certain amount of installation space, and the motor 100 is relatively small in size, which is conducive to the miniaturization of the electric toothbrush 1000. On the other hand, the first stator 31 surrounds the first mover 33, so that the second magnetic member 331 can be completely located in the magnetic field of the first coil 311, and the first coil 311 and the second magnetic member 331 cooperate well.

[0046] See also Figure 2 and Figure 3In the related art, the resetting of the motor shaft 20 needs to be realized by using an elastic seat, which has a complex structure and a large volume, so that the volume of the motor 100 is large, which is not conducive to the miniaturization of the electric toothbrush 1000. The present application uses the magnetic attraction between the first magnetic member 313 and the second magnetic member 331 to reset the electrode shaft. When the first magnetic member 313 and the second magnetic member attract each other to reset the electrode shaft to the initial position, the resetting structure of the motor shaft 20 is relatively simple and the assembly is relatively simple. In addition, the volume of the first magnetic member 313 and the second magnetic member 331 is relatively small, so that the volume of the motor 100 is relatively small, which is conducive to the miniaturization of the electric toothbrush 1000.

[0047] When the motor shaft 20 is in the initial position, at least part of the second magnetic member 331 corresponds to the first magnetic member 313 in the axial direction X perpendicular to the motor shaft 20. The second magnetic member 331 has different magnetic properties from the corresponding first magnetic member 313, so that a magnetic attraction can be generated between the first magnetic member 313 and the second magnetic member 331. When the first coil 311 is powered off, the magnetic field of the first coil 311 disappears, so that the second magnetic member 331 can no longer drive the motor shaft 20 to move back and forth together. At this time, the magnetic attraction between the first magnetic member 313 and the second magnetic member 331 can drive the motor shaft 20 to reset to the initial position. Among them, the magnetic attraction between the first magnetic member 313 and the second magnetic member 331 is less than the driving force formed by the coupling of the magnetic field of the first coil 311 and the magnetic field of the second magnetic member 331. When the motor shaft 20 does not need to drive the brush head 500 to reciprocate, the first magnetic member 313 and the second magnetic member 331 attract each other, so that the motor shaft 20 drives the brush head 500 to reset to the initial position. When the motor shaft 20 drives the brush head 500 to reset to the initial position, it can ensure that the brush head 500 can return to a fixed original position after each use. In this way, the user can more conveniently control the position of the brush head 500 when using it next time, thereby improving the stability and comfort of using the electric toothbrush 1000. In addition, when the motor 100 is not running, the motor shaft 20 can be stably in the initial position, which can prevent the motor shaft 20 from shaking relative to the housing 10, and the overall structural stability of the motor 100 is relatively high.

[0048] Exemplarily, when both the first magnetic member 313 and the second magnetic member 331 are single-pole magnetic members, in one example, the magnetic pole of the first magnetic member 313 is an S pole, and the magnetic pole of the second magnetic member 331 corresponding to the first magnetic member 313 is an N pole. In another example, the magnetic pole of the first magnetic member 313 is an N pole, and the magnetic pole of the second magnetic member 331 corresponding to the first magnetic member 313 is an S pole. When both the first magnetic member 313 and the second magnetic member 331 are dual-pole magnetic members, in one example, the magnetic pole of the second magnetic member 331 on the side close to the first end 11 of the shell 10 is an S pole, and the magnetic pole of the second magnetic member 331 on the side away from the first end 11 of the shell 10 is an N pole. At this time, the magnetic pole of the first magnetic member 313 on the side close to the first end 11 of the shell 10 is an N pole, and the magnetic pole of the second magnetic member 331 on the side away from the first end 11 of the shell 10 is an S pole. In another example, the magnetic pole of the second magnetic member 331 on the side close to the first end 11 of the housing 10 is an N pole, and the magnetic pole of the second magnetic member 331 on the side away from the first end 11 of the housing 10 is an S pole. In this case, the magnetic pole of the first magnetic member 313 on the side close to the first end 11 of the housing 10 is an S pole, and the magnetic pole of the second magnetic member 331 on the side away from the first end 11 of the housing 10 is an N pole.

[0049] In the motor 100 of the embodiment of the present application, the magnetic field generated by the first coil 311 being energized and the magnetic field generated by the second magnetic member 331 are coupled to each other to generate a translational driving force. When the energizing direction of the first coil 311 changes, the second magnetic member 331 drives the motor shaft 20 to reciprocate and translate along the axis of the motor shaft 20. When the first coil 311 is de-energized, the magnetic attraction between the first magnetic member 313 and the second magnetic member 331 drives the motor shaft 20 to reset. The present application uses the magnetic attraction between the first magnetic member 313 and the second magnetic member 331 to reset the motor shaft 20. The reset structure of the motor shaft 20 is relatively simple, and the volume of the first magnetic member 313 and the second magnetic member 331 is relatively small, so that the volume of the motor 100 is relatively small, which is conducive to miniaturization of the motor 100.

[0050] The motor 100 is further described below with reference to the accompanying drawings.

[0051] See also Figure 2 and Figure 3In some embodiments, the motor 100 also includes a rotation drive component 90. The rotation drive component 90 and the translation drive component 30 are arranged in sequence in the axial direction X of the motor shaft 20. The rotation drive component 90 is installed at the second end 13 of the shell 10. The rotation drive component 90 includes a second stator 91 and a second mover 93. The second stator 91 is installed in the shell 10 and is relatively fixed to the shell 10. The second mover 93 is installed in the shell 10 and fixedly installed on the motor shaft 20. The magnetic field generated by the power supply of the second stator 91 and the magnetic field generated by the second mover 93 are coupled with each other to generate a rotation driving force. When the power supply direction of the second stator 91 changes, the second mover 93 drives the motor shaft 20 to rotate forward and reverse around the axis of the motor shaft 20.

[0052] Specifically, in some embodiments, the second stator 91 includes a second coil, the second mover 93 includes a third magnetic component, the third magnetic component is fixedly connected to the motor shaft 20, the second coil surrounds the second mover 93, and the magnetic field generated by the second coil being energized is coupled with the magnetic field of the third magnetic component to generate a rotational driving force. When the power-on direction of the second coil changes, the direction of the rotational driving force also changes, and the motor shaft 20 is driven to rotate forward and reverse around the axis of the motor shaft 20 through the third magnetic component.

[0053] Among them, the rotation drive assembly 90 is a structure for driving the motor shaft 20 to rotate forward and reversely around the axis of the motor shaft 20 relative to the housing 10. The rotation drive assembly 90 is installed in the housing 10 and is located at the second end 13 of the housing 10. The forward and reverse rotation of the motor shaft 20 around the axis of the motor shaft 20 means that the motor shaft 20 rotates clockwise around the axis of the motor shaft 20 at a certain angle relative to the initial position, and thereafter, the motor shaft 20 rotates counterclockwise around the axis of the motor shaft 20 at a certain angle relative to the initial position. As a result, the motor shaft 20 can drive the brush head 500 to rotate forward and reversely around the axis of the motor shaft 20, and the brush head 500 can produce a circumferential vibration effect. Exemplarily, after the motor shaft 20 rotates 3° clockwise around the axis of the motor shaft 20 relative to the initial position, the motor shaft 20 rotates 3° counterclockwise around the axis of the motor shaft 20 relative to the initial position. By rotating repeatedly in this way, the motor shaft 20 can realize forward and reverse rotation around the axis of the motor shaft 20, and the motor shaft 20 can drive the brush head 500 to vibrate in the circumferential direction.

[0054] See also Figure 2 and Figure 3, the second stator 91 cooperates with the second mover 93 so that the second mover 93 can drive the motor shaft 20 to rotate forward and reverse relative to the housing 10. The second coil can generate a magnetic field when it is energized, and the third magnetic member itself is magnetic. The magnetic field of the second coil interacts with the magnetic field of the third magnetic member to generate a driving force. The driving force can drive the third magnetic member to rotate forward and reverse around the axis of the motor shaft 20. Since the third magnetic member is fixedly connected to the motor shaft 20, the third magnetic member can drive the motor shaft 20 to rotate forward and reverse around the axis of the motor shaft 20. When the direction of the current in the second coil changes, the direction of the magnetic field of the second coil will change. Exemplarily, when the second coil is passed through a current in the third direction, the driving force generated by the interaction between the magnetic field of the second coil and the magnetic field of the third magnetic member can cause the third magnetic member to drive the motor shaft 20 to rotate clockwise around the axis of the motor shaft 20. When the second coil is passed through a current in the fourth direction, the driving force generated by the interaction between the magnetic field of the second coil and the magnetic field of the third magnetic member can cause the third magnetic member to drive the motor shaft 20 to rotate counterclockwise around the axis of the motor shaft 20. The third direction is opposite to the fourth direction. In this way, by changing the direction of power supply to the second coil, an alternating magnetic field can be formed in the second coil, and the third magnetic member can rotate forward and reverse in the magnetic field, so that the motor shaft 20 rotates forward and reverse around the axis of the motor shaft 20 .

[0055] In one embodiment, the translation drive assembly 30 and the rotation drive assembly 90 are controlled by a controller. When the electric toothbrush 1000 is started, the translation drive assembly 30 and the rotation drive assembly 90 are started at the same time. At this time, while the motor shaft 20 reciprocates along the axis of the motor shaft 20, the motor shaft 20 can also rotate forward and reverse around the axis of the motor shaft 20, so that the brush head 500 can simultaneously achieve axial vibration and circumferential vibration, and the brush head 500 can clean the oral cavity in all directions.

[0056] In another embodiment, the translation drive assembly 30 and the rotation drive assembly 90 are controlled by two controllers respectively. In one example, when the electric toothbrush 1000 is started, the translation drive assembly 30 can be controlled to start. At this time, the motor shaft 20 can drive the brush head 500 to achieve vibration in the axial direction. In another example, when the electric toothbrush 1000 is started, the rotation drive assembly 90 can be controlled to start. At this time, the motor shaft 20 can drive the brush head 500 to achieve vibration in the circumferential direction. In another example, when the electric toothbrush 1000 is started, the rotation drive assembly 90 and the translation drive assembly 30 can be controlled to start at the same time. When the translation drive assembly 30 and the rotation drive assembly 90 are controlled by two controllers respectively, the control of the translation drive assembly 30 and the rotation drive assembly 90 is more flexible and can meet the needs of users in different situations.

[0057] See also Figure 2 and Figure 3In some embodiments, the motor 100 also includes a first bearing 60 and a second bearing 80. In the direction from the first end 11 of the shell 10 to the second end 13 of the shell 10, the first bearing 60, the translational drive assembly 30, the rotational drive assembly 90 and the second bearing 80 are arranged in sequence, and the first bearing 60, the translational drive assembly 30, the rotational drive assembly 90 and the second bearing 80 are all sleeved on the motor shaft 20.

[0058] The first bearing 60 includes a bearing outer ring and a bearing inner ring, and the second bearing 80 includes a bearing outer ring and a bearing inner ring. The bearing outer ring of the first bearing 60 is fixedly connected to the first end 11 of the housing 10, and the bearing outer ring of the second bearing 80 is fixedly connected to the second end 13 of the housing 10. The bearing inner ring of the first bearing 60 is sleeved and installed on the first end of the motor shaft 20, and the bearing inner ring of the second bearing 80 is sleeved and installed on the second end of the motor shaft 20. The bearing inner ring can rotate relative to the bearing outer ring together with the motor shaft 20. The arrangement of the first bearing 60 and the second bearing 80 can reduce the friction between the motor shaft 20 and the housing 10, and avoid the motor shaft 20 directly contacting the housing 10 when the motor shaft 20 rotates around the axis of the motor shaft 20, resulting in excessive friction between the motor shaft 20 and the housing 10, thereby reducing the energy loss generated during the operation of the motor 100 and ensuring the operation efficiency of the motor 100. It should be noted that, in some embodiments, the first bearing 60 includes but is not limited to rolling bearings, sliding bearings, spherical bearings and oil-containing bearings, and the second bearing 80 includes but is not limited to rolling bearings, sliding bearings, spherical bearings and oil-containing bearings.

[0059] When the motor shaft 20 moves from the second end 13 of the housing 10 to the first end 11 of the housing 10, the first mover 33 sleeved on the motor shaft 20 will have the risk of contacting the first bearing 60. When the first mover 33 contacts the first bearing 60, the first mover 33 will transfer the vibration force of the motor shaft 20 to the first bearing 60, and the first bearing 60 will transfer the vibration to the housing 10. When the vibration force of the housing 10 is large, when the user uses the electric toothbrush 1000, the vibration force of the motor 100 will be transmitted from the housing 10 of the brush handle 300 to the user's hand, so that the user will feel a large vibration force, and the user's experience is poor. In addition, when the vibration force of the housing 10 is large, it may also affect the stability of the connection between the motor 100 and the housing 10 of the brush handle 300. In addition, when the housing 10 vibrates greatly, the noise generated by the motor 100 is large, and the user's experience is poor.

[0060] See also Figure 2 and Figure 3In some embodiments, the motor 100 further includes a shock absorber 40, which is fixedly mounted on the motor shaft 20 and located between the first mover 33 and the first end 11 of the housing 10. Specifically, the shock absorber 40 is fixedly sleeved on the motor shaft 20 and located between the first mover 33 and the first bearing 60. When the motor shaft 20 reciprocates along the axial direction X of the motor shaft 20, the shock absorber 40 is used to absorb the vibration force transmitted from the motor shaft 20 to the housing 10, so as to reduce the vibration transmitted to the housing 10 when the motor shaft 20 moves, thereby reducing the noise when the motor 100 is working. The material of the shock absorber 40 includes but is not limited to rubber, latex, polyurethane foam, and ethylene-vinyl acetate copolymer materials.

[0061] The present application sets a shock absorber 40 between the first mover 33 and the first bearing 60. The shock absorber 40 can reduce the vibration force transmitted from the first mover 33 to the first bearing 60, so that the vibration force on the housing 10 is small. When the user uses the electric toothbrush 1000, the vibration force of the brush handle 300 is small, and the noise generated by the motor 100 is also small, so that the user will not feel a large vibration force, nor will he hear a lot of noise, and the user experience is good. The stability of the connection between the motor 100 and the housing 10 of the brush handle 300 is also good, which can prevent the motor 100 from shaking inside the housing 10 of the brush handle 300. In addition, the shock absorber 40 is sleeved on the motor shaft 20, the installation of the shock absorber 40 is relatively simple, and the volume of the shock absorber 40 is relatively small, so the volume of the motor 100 is relatively small, which is conducive to the miniaturization of the electric toothbrush 1000.

[0062] See also Figure 2 and Figure 3 In some embodiments, the first magnetic member 313 includes two first magnetic members 313, and in the axial direction X of the motor shaft 20, the two first magnetic members 313 are respectively arranged at opposite ends of the first coil 311. The first magnetic member 313 is fixedly mounted on the housing 10. When the two first magnetic members 313 are respectively arranged at opposite ends of the first coil 311, the first magnetic member 313 not only cooperates with the second magnetic member 331 to reset the electrode shaft, but also is used to clamp the first coil 311 together to limit the first coil 311, thereby avoiding the problem of displacement of the first coil 311 when the motor 100 is running and vibrating.

[0063] See also Figure 2 and Figure 3 In some embodiments, there is one second magnetic member 331, which is sleeved on the motor shaft 20, and in the axial direction X perpendicular to the motor shaft 20, at least part of one second magnetic member 331 corresponds to the first magnetic member 313. In this case, the number of second magnetic members 331 is small, and the assembly of the motor 100 is relatively simple.

[0064] The first coil 311 includes a first end and a second end opposite to each other, and the first end of the first coil 311 is closer to the first end 11 of the housing 10 than the second end of the first coil 311. The two first magnetic members 313 are respectively arranged at the first end and the second end of the first coil 311. In the axial direction X perpendicular to the motor shaft 20, at least part of the second magnetic member 331 corresponds to both first magnetic members 313, that is, the second magnetic member 331 has a longer length in the axial direction X of the motor shaft 20, and the first mover 33 may only include the second magnetic member 331. The magnetic poles of the opposite ends of the second magnetic member 331 are different. After the first coil 311 is powered off, that is, the motor shaft 20 stops reciprocating and translating along the axial direction X of the motor shaft 20, the first magnetic member 313 arranged at the first end of the first coil 311 attracts one end of the second magnetic member 331, and the first magnetic member 313 arranged at the second end of the first coil 311 attracts the other end of the second magnetic member 331, thereby resetting the electrode shaft to the initial position. The motor shaft 20 is subjected to two magnetic forces during the resetting process, and under the action of the two magnetic forces, the motor shaft 20 can be effectively reset to the initial position. In addition, when the motor 100 is not running, the motor shaft 20 can be stably located at the initial position under the action of the two magnetic forces, which can prevent the motor shaft 20 from shaking relative to the housing 10, and the overall structural stability of the motor 100 is relatively high.

[0065] See also Figure 2 and Figure 3 In other embodiments, the second magnetic member 331 includes two, and the two second magnetic members 331 are both sleeved on the motor shaft 20. The first mover 33 also includes an iron core 333, and the iron core 333 is sleeved on the motor shaft 20. In the axial direction X of the motor shaft 20, the two second magnetic members 331 are respectively located at opposite ends of the iron core 333 and correspond to the two first magnetic members 313. In this case, the second magnetic member 331 uses less material, which can save material cost.

[0066] The iron core 333 includes a first end and a second end opposite to each other, and the first end of the iron core 333 is closer to the first end 11 of the housing 10 than the second end of the iron core 333. The two second magnetic members 331 are respectively located at the first end and the second end of the iron core 333. When the motor shaft 20 is in the initial position, in the axial direction X perpendicular to the motor shaft 20, at least a portion of the second magnetic member 331 located at the first end of the iron core 333 corresponds to the first magnetic member 313 located at the first end of the first coil 311, and at least a portion of the second magnetic member 331 located at the second end of the iron core 333 corresponds to the first magnetic member 313 located at the second end of the first coil 311. After the first coil 311 is powered off, that is, the motor shaft 20 stops reciprocating along the axial direction X of the motor shaft 20, the second magnetic member 331 located at the first end of the iron core 333 is attracted to the first magnetic member 313 located at the first end of the first coil 311, and the second magnetic member 331 located at the second end of the iron core 333 is attracted to the first magnetic member 313 located at the second end of the first coil 311, so as to reset the electrode shaft. The motor shaft 20 is subjected to two magnetic attraction forces during the resetting process, and under the action of the two magnetic forces, the motor shaft 20 can be effectively reset to the initial position. In addition, when the motor 100 is not running, the motor shaft 20 can be stably located at the initial position under the action of the two magnetic attraction forces, which can prevent the motor shaft 20 from shaking relative to the housing 10, and the overall structural stability of the motor 100 is relatively high.

[0067] The iron core 333 is used to position the two second magnetic parts 331 so that the two second magnetic parts 331 can correspond to the two first magnetic parts 313 respectively when the first coil 311 is not energized, so that the motor shaft 20 can be stably in the initial position. When the first coil 311 is energized, the iron core 333 can also be used to enhance the magnetic field of the first coil 311 so that when the magnetic field of the first coil 311 is coupled with the magnetic field of the second magnetic part 331, the motor shaft 20 can obtain sufficient driving force, which can effectively drive the motor shaft 20 to reciprocate and translate along the axial direction X of the motor shaft 20. The first mover 33 of the embodiment of the present application includes an iron core 333 and two second magnetic parts 331.

[0068] See also Figure 2 and Figure 3 In some embodiments, the second magnetic member 331 is a single body structure. In this case, the assembly of the second magnetic member 331 is relatively simple, and the second magnetic member 331 can be directly sleeved on the motor shaft 20. In other embodiments, the second magnetic member 331 includes a plurality of magnetic tiles, and the plurality of magnetic tiles are distributed along the circumference of the motor shaft 20.

[0069] See also Figure 2 and Figure 3Furthermore, in some embodiments, the motor 100 also includes a limit assembly 50, which is installed in the housing 10 and fixed relative to the housing 10. The limit assembly 50 is connected to the end of the first stator 31, and the limit assembly 50 is used to limit the position of the first stator 31 in the axial direction X of the motor shaft 20.

[0070] Among them, the limit assembly 50 is used to fill the gap between the first stator 31 and the housing 10 in the axial direction X of the motor shaft 20, so that the first stator 31 is stably installed in the housing 10, which can prevent the first stator 31 from shaking relative to the housing 10, and the overall structural stability of the motor 100 is relatively high. When the first stator 31 is stably installed in the housing 10, the first coil 311 is fixed relative to the housing 10. When the first coil 311 is energized, the magnetic field formed by the first coil 311 is relatively stable, so that the driving force received by the motor shaft 20 is relatively stable. The first magnetic member 313 is also fixed relative to the housing 10. When the first coil 311 is powered off, the first magnetic member 313 and the second magnetic member 331 attract each other, which can accurately reset the motor shaft 20 to the initial position (if the first magnetic member 313 moves relative to the housing 10, after the first magnetic member 313 and the second magnetic member 331 attract each other, the position of the motor shaft 20 may no longer be the initial position).

[0071] See also Figure 2 and Figure 3 Specifically, in some embodiments, the limit assembly 50 includes a first limit member 51, and the first limit member 51 is disposed between the first end 11 of the shell 10 and the first stator 31, or the first limit member 51 is disposed between the first stator 31 and the second end 13 of the shell 10.

[0072] In one example, the first stopper 51 is disposed between the first end 11 of the housing 10 and the first stator 31. In this case, the first stopper 51 is used to fill the gap between the first stator 31 and the first end 11 of the housing 10, and the first stopper 51 is used to limit the movement of the first stator 31 in the direction from the second end 13 of the housing 10 to the first end 11 of the housing 10. In another example, the first stopper 51 is disposed between the first stator 31 and the second end 13 of the housing 10, and in the case where the motor 100 includes a rotation drive assembly, the first stopper 51 is disposed between the first stator 31 and the rotation drive assembly. In this case, the first stopper 51 is used to fill the gap between the first stator 31 and the rotation drive assembly, and the first stopper 51 is used to limit the movement of the first stator 31 in the direction from the first end 11 of the housing 10 to the second end 13 of the housing 10. In the case where the stopper assembly 50 includes the first stopper 51, the structure of the stopper assembly 50 is relatively simple, the installation of the stopper assembly 50 is relatively simple, and the material cost can be saved.

[0073] In other embodiments, the limiting assembly 50 includes a first limiting member 51 and a second limiting member 53 , wherein the first limiting member 51 is disposed between the first end and the first stator 31 , and the second limiting member 53 is disposed between the first stator 31 and the second end 13 of the housing 10 .

[0074] Specifically, the first stopper 51 is used to fill the gap between the first stator 31 and the first end 11 of the housing 10, and the first stopper 51 is used to limit the movement of the first stator 31 in the direction from the second end 13 of the housing 10 to the first end 11 of the housing 10. The second stopper 53 is used to fill the gap between the first stator 31 and the rotation drive assembly, and the second stopper 53 is used to limit the movement of the first stator 31 in the direction from the first end 11 of the housing 10 to the second end 13 of the housing 10. In the case where the stopper assembly 50 includes the first stopper 51 and the second stopper 53, the stopper assembly 50 has a better limiting effect on the first stator 31, and the first stator 31 can be stably installed in the housing 10, which can effectively prevent the first stator 31 from shaking relative to the housing 10. The stopper assembly 50 of the embodiment of the present application includes the first stopper 51 and the second stopper 53.

[0075] See also Figure 2 and Figure 3 In some embodiments, the first stator 31 further includes a spacer block 315 , which is fixedly installed in the housing 10 , and the spacer block 315 and the limiting assembly 50 jointly limit the position of the first magnetic component 313 in the axial direction X of the motor shaft 20 .

[0076] The pad 315 is disposed around the first coil 311, and the pad 315 is located between the two first magnetic members 313, and the opposite sides of the pad 315 are respectively in contact with the two first magnetic members 313. The pad 315 and the first stopper 51 jointly clamp the first magnetic member 313 at the first end of the first coil 311, so that the first magnetic member 313 at the first end of the first coil 311 can be fixed relative to the housing 10, and the first magnetic member 313 is prevented from moving relative to the housing 10 in the axial direction X of the motor shaft 20. The pad 315 and the second stopper 53 jointly clamp the first magnetic member 313 at the second end of the first coil 311, so that the first magnetic member 313 can be fixed relative to the housing 10, and the first magnetic member 313 is prevented from moving relative to the housing 10 in the axial direction X of the motor shaft 20.

[0077] See also Figure 2 and Figure 3 Furthermore, in some embodiments, the motor 100 also includes a limiting component 70, which is installed on the motor shaft 20 and connected to the end of the first mover 33, and the limiting component 70 is used to limit the position of the first mover 33 in the axial direction X of the motor shaft 20.

[0078] The limiting assembly 70 is fixedly sleeved on the motor shaft 20, and the limiting assembly 70 is used to limit the first mover 33 from moving relative to the motor shaft 20 along the axial direction X of the motor shaft 20, so that the first mover 33 can be fixed relative to the motor shaft 20. When the first mover 33 is fixed relative to the motor shaft 20, the second magnetic member 331 is fixed relative to the motor shaft 20, so that when the second magnetic member 331 is subjected to a driving force, the second magnetic member 331 can effectively drive the motor shaft 20 to reciprocate relative to the housing 10 (if the second magnetic member 331 moves relative to the motor shaft 20, when the second magnetic member 331 is subjected to a driving force, the second magnetic member 331 may not be able to drive the motor shaft 20 to move together).

[0079] See also Figure 2 and Figure 3 Specifically, in some embodiments, the first mover 33 includes a first end and a second end opposite to each other, and the first end 335 of the first mover 33 is closer to the first end 11 of the housing 10 than the second end 337 of the first mover 33. The limiting assembly 70 includes a first limiting member 71, and the first limiting member 71 is connected to the first end 335 of the first mover 33. Among them, the first limiting member 71 is arranged at the first end 335 of the first mover 33, and the first limiting member 71 is used to limit the movement of the first mover 33 relative to the motor shaft 20 along the direction from the second end 13 of the housing 10 to the first end 11 of the housing 10. At this time, the limiting assembly 70 has a simple structure, the limiting assembly 70 is relatively easy to install, and the material cost can be saved. The shock absorber 40 is arranged between the first limiting member 71 and the first bearing 60, and the shock absorber 40 is used to reduce the vibration force transmitted from the motor shaft 20 to the housing 10.

[0080] See also Figure 2 and Figure 3 In other embodiments, the limiting assembly 70 includes a first limiting member 71 and a second limiting member 73 , wherein the first limiting member 71 is connected to the first end 335 of the first mover 33 , and the second limiting member 73 is connected to the second end 337 of the first mover 33 .

[0081] The first limiting member 71 is provided at the first end 335 of the first mover 33, and the first limiting member 71 is used to limit the movement of the first mover 33 relative to the motor shaft 20 along the direction from the second end 13 of the housing 10 to the first end 11 of the housing 10. The second limiting member 73 is provided at the second end 337 of the first mover 33, and the second limiting member 73 is used to limit the movement of the first mover 33 relative to the motor shaft 20 along the direction from the first end 11 of the housing 10 to the second end 13 of the housing 10. In the case where the limiting assembly 70 includes the first limiting member 71 and the second limiting member 73, the limiting assembly 70 has a better limiting effect on the first mover 33, and the first mover 33 can be stably connected to the motor shaft 20, which can effectively prevent the first mover 33 from moving relative to the motor shaft 20. In addition, in the case where the first limiting member 71 and the second limiting member 73 jointly clamp the first mover 33, the connection between the two second magnetic members 331 and the iron core 333 is relatively tight, and no other connection structure is required between the two second magnetic members 331 and the iron core 333, and the structure of the first mover 33 is relatively simple. The limiting assembly 70 according to the embodiment of the present application includes a first limiting member 71 and a second limiting member 73 .

[0082] See also Figure 4 , the electric toothbrush 1000 of the embodiment of the present application includes the motor 100 of the above embodiment.

[0083] In the motor 100 and electric toothbrush 1000 of the embodiment of the present application, the magnetic field generated by the first coil 311 being energized and the magnetic field generated by the second magnetic member 331 are coupled to each other to generate a translational driving force. When the energizing direction of the first coil 311 changes, the second magnetic member 331 drives the motor shaft 20 to reciprocate and translate along the axis of the motor shaft 20. When the first coil 311 is de-energized, the magnetic attraction between the first magnetic member 313 and the second magnetic member 331 drives the motor shaft 20 to reset. The present application uses the magnetic force between the first magnetic member 313 and the second magnetic member 331 to reset the motor shaft 20. The reset structure of the motor shaft 20 is relatively simple, and the volume of the first magnetic member 313 and the second magnetic member 331 is relatively small, so that the volume of the motor 100 is relatively small, which is conducive to miniaturization of the motor 100.

[0084] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. At the same time, other implementation methods can be derived from the above-mentioned embodiments, so that structural and logical replacements and changes can be made without departing from the scope of this disclosure.

[0085] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A motor, characterized in that: include: case; a motor shaft, wherein the motor shaft is at least partially disposed in the housing; and A translational drive component, the translational drive component includes a first stator and a first mover, the first stator is installed in the shell and fixed relative to the shell, the first stator includes a first coil and a first magnetic part, the first coil is connected to the first magnetic part, the first mover is installed in the shell and fixedly installed on the motor shaft, the first mover includes a second magnetic part, in the axial direction perpendicular to the motor shaft, at least part of the second magnetic part corresponds to the first magnetic part, the magnetic field generated by the first coil being energized and the magnetic field generated by the second magnetic part are coupled with each other to generate a translational drive force, when the energization direction of the first coil changes, the second magnetic part drives the motor shaft to reciprocate along the axis of the motor shaft, when the first coil is powered off, the magnetic attraction between the first magnetic part and the second magnetic part drives the motor shaft to reset.

2. The motor according to claim 1, characterized in that The shell includes a first end and a second end opposite to each other, and the translational drive assembly is installed on the first end of the shell; the motor also includes a shock absorber, which is fixedly installed on the motor shaft and located between the first mover and the first end of the shell.

3. The motor according to claim 1, characterized in that The first magnetic members include two. In the axial direction of the motor shaft, the two first magnetic members are respectively arranged at opposite ends of the first coil.

4. The motor according to claim 1, characterized in that There is one second magnetic member, which is sleeved on the motor shaft. In the axial direction perpendicular to the motor shaft, at least a portion of one second magnetic member corresponds to the first magnetic member.

5. The motor according to claim 1, characterized in that The first magnetic parts include two, and in the axial direction of the motor shaft, the two first magnetic parts are arranged at the opposite ends of the first coil; the second magnetic parts include two, and the two second magnetic parts are both sleeved on the motor shaft. The first mover also includes an iron core, and the iron core is sleeved on the motor shaft. In the axial direction of the motor shaft, the two second magnetic parts are respectively located at the opposite ends of the iron core, and correspond to the two first magnetic parts respectively.

6. The motor according to claim 1, characterized in that The second magnetic member is a single body structure; or The second magnetic component includes a plurality of magnetic tiles, and the plurality of magnetic tiles are distributed along the circumference of the motor shaft.

7. The motor according to claim 1, characterized in that The motor further comprises a limit assembly, which is installed in the housing and fixed relative to the housing, and is connected to an end of the first stator, and is used to limit the position of the first stator in the axial direction of the motor shaft.

8. The motor according to claim 7, characterized in that The shell includes a first end and a second end opposite to each other, and the translational drive assembly is installed on the first end of the shell; the limiting assembly includes a first limiting member, and the first limiting member is arranged between the first end of the shell and the first stator, or the first limiting member is arranged between the first stator and the second end of the shell.

9. The motor according to claim 7, characterized in that The shell includes a first end and a second end opposite to each other, and the translational drive assembly is installed on the first end of the shell; the limiting assembly includes a first limiting member and a second limiting member, the first limiting member is arranged between the first end and the first stator, and the second limiting member is arranged between the first stator and the second end of the shell.

10. The motor according to claim 7, characterized in that The first stator further includes a cushion block, which is fixedly installed in the housing. The cushion block and the limiting assembly together limit the position of the first magnetic component in the axial direction of the motor shaft.

11. The motor according to claim 1, characterized in that The motor further comprises a limiting assembly, wherein the limiting assembly is mounted on the motor shaft and connected to an end of the first mover, and the limiting assembly is used to limit a position of the first mover in an axial direction of the motor shaft.

12. The motor according to claim 11, characterized in that The shell includes a first end and a second end relative to each other, the translation drive assembly is installed on the first end of the shell, the first mover includes a first end and a second end relative to each other, and the first end of the first mover is closer to the first end of the shell than the second end of the first mover; the limiting assembly includes a first limiting member, and the first limiting member is connected to the first end of the first mover.

13. The motor according to claim 11, characterized in that The shell includes a first end and a second end relative to each other, the translation drive assembly is installed on the first end of the shell, the first mover includes a first end and a second end relative to each other, and the first end of the first mover is closer to the first end of the shell than the second end of the first mover; the limiting assembly includes a first limiting member and a second limiting member, the first limiting member is connected to the first end of the first mover, and the second limiting member is connected to the second end of the first mover.

14. The motor according to claim 1, characterized in that The housing comprises a first end and a second end opposite to each other, and the translation drive assembly is mounted on the first end of the housing; the motor further comprises: A rotation drive component, the rotation drive component and the translation drive component are arranged in sequence in the axial direction of the motor shaft, the rotation drive component is installed at the second end of the shell, the rotation drive component includes a second stator and a second mover, the second stator is installed in the shell, and the shell is relatively fixed, the second mover is installed in the shell and fixedly installed on the motor shaft, the magnetic field generated by the second stator when it is energized and the magnetic field generated by the second mover are coupled with each other to generate a rotation drive force, and when the energization direction of the second stator changes, the second mover drives the motor shaft to rotate forward and reverse around the axis of the motor shaft.

15. The motor according to claim 14, characterized in that The second stator includes a second coil, and the second mover includes a third magnetic part. The third magnetic part is fixedly connected to the motor shaft. The second coil surrounds the second mover. The magnetic field generated by the second coil being energized is coupled with the magnetic field of the third magnetic part to generate the rotational driving force. When the energization direction of the second coil changes, the direction of the rotational driving force also changes, and the motor shaft is driven to rotate forward and reverse around the axis of the motor shaft through the third magnetic part.

16. The motor according to claim 14, characterized in that The motor also includes a first bearing and a second bearing. In the direction from the first end of the shell to the second end of the shell, the first bearing, the translational drive assembly, the rotational drive assembly and the second bearing are arranged in sequence, and the first bearing, the translational drive assembly, the rotational drive assembly and the second bearing are all sleeved on the motor shaft.

17. An electric toothbrush, characterized in that: A motor comprising any one of claims 1-16.

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