Electric toothbrush with position detection function

Abstract

The embodiment of the utility model provides an electric toothbrush with a position detection function. The electric toothbrush comprises a support assembly and a motor. The motor comprises a motor body and a position detection device, the motor body is installed on the support assembly and comprises a motor shell and a motor shaft, the motor shaft is installed on the motor shell and can move relative to the motor shell, and the position detection device is arranged at one end of the motor shell and used for sensing the movement position of the motor shaft. And the motor main body and the position detection device are positioned and restrained by the same bracket assembly, so that the motor shell and the bracket assembly are in non-motion fit, and / or the position detection device and the bracket assembly are in non-motion fit. In the application, the relative constraint exists between the motor main body and the position detection device, so that the relative position between the motor main body and the position detection device can be prevented from changing in the operation process of the motor, that is, the relative position between the motor main body and the position detection device is ensured to be stable, and the detection reliability of the position detection device is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of oral care, and in particular to an electric toothbrush with a position detection function. Background Art

[0002] In the related art, an electric toothbrush is usually provided with a motor, which includes a motor body and a detection device, and the detection device can detect the movement position of the motor shaft of the motor body to control the movement of the brush head assembly of the electric toothbrush. Generally, the two ends of the motor are respectively matched with different structural parts to achieve installation and positioning. However, the two ends of the motor are matched with different structural parts, which easily leads to the lack of relative constraints on the two ends of the motor, which will cause the relative position of the two ends of the motor to be unstable, that is, the position stability between the motor body and the detection device is poor, which leads to the low accuracy of the detection device in detecting the movement position of the motor shaft. Utility Model Content

[0003] In view of the above problems, the present application provides an electric toothbrush with a position detection function, which can avoid the problem that the relative position of the two ends of the motor is unstable, resulting in low accuracy of the detection device in detecting the movement position of the motor shaft.

[0004] The electric toothbrush of the embodiment of the present application includes a bracket assembly and a motor. The motor includes a motor body and a position detection device, the motor body is installed on the bracket assembly, and includes a motor housing and a motor shaft, the motor shaft is installed on the motor housing and can move relative to the motor housing, the position detection device is arranged at one end of the motor housing, the position detection device is used to sense the moving position of the motor shaft, the motor body and the position detection device are positioned and constrained by the same bracket assembly, so that the motor housing and the bracket assembly form a non-moving fit, and / or the position detection device and the bracket assembly form a non-moving fit.

[0005] In some embodiments, the bracket assembly is formed with a bracket body and a cover body on an axial dividing interface, the bracket body is provided with a first accommodating groove, the cover body is provided with a second accommodating groove, the first accommodating groove and the second accommodating groove together form a positioning cavity, the motor is installed in the positioning cavity, and the cover body is rigidly connected to the bracket body so that the motor housing is fixed relative to the bracket assembly in the direction of rotation about the axis of the motor shaft, and / or the position detection device is fixed relative to the bracket assembly in the direction of rotation about the axis of the motor shaft, and the motor housing and the position detection device are both fixed relative to the bracket assembly in the axial direction of the motor shaft.

[0006] In some embodiments, the electric toothbrush also includes a limiting assembly, which includes a first limiting member and a second limiting member, one of the first limiting member and the second limiting member is arranged on the motor, and the other is arranged on the bracket assembly, and the first limiting member and the second limiting member cooperate to limit the relative rotation between the motor and the bracket assembly.

[0007] In some embodiments, the limiting assembly includes at least two, and the first limiting members of at least two of the limiting assemblies are both disposed on the motor housing.

[0008] In some embodiments, the first limiting members of at least two of the limiting assemblies are both disposed on the position detection device.

[0009] In some embodiments, a portion of the first limiting members in at least two of the limiting assemblies are disposed on the motor housing, and another portion of the first limiting members are disposed on the position detection device.

[0010] In some embodiments, in the axial direction of the motor shaft, the motor includes a first end and a second end relative to each other, one of the first limiting member and the second limiting member is arranged at the first end of the motor and / or the second end of the motor, and the other is arranged at a position of the bracket assembly corresponding to the first limiting member or the second limiting member on the motor, and the first limiting member cooperates with the second limiting member to form a non-rotating fit between the first end of the motor and the bracket assembly, and / or a non-rotating fit between the second end of the motor and the bracket assembly.

[0011] In some embodiments, the motor further comprises a first induction member, which is rigidly mounted on the motor shaft. The position detection device comprises a fixing assembly and a second induction member, wherein the fixing assembly is rigidly connected to one end of the motor housing; the second induction member is rigidly mounted on the fixing assembly, and the first induction member and the second induction member cooperate to sense the moving position of the motor shaft.

[0012] In some embodiments, the fixing assembly is rigidly connected to one end of the motor housing via a first fastener, and the first fastener locks the motor housing and the fixing assembly along the radial direction of the motor shaft.

[0013] In some embodiments, the fixing assembly is rigidly connected to one end of the motor housing via a first fastener, and the first fastener locks the motor housing and the fixing assembly along the axial direction of the motor shaft.

[0014] In some embodiments, the fixing assembly is rigidly connected to one end of the motor housing via a first fastener, and adhesive is provided between the first fastener and the motor housing.

[0015] In some embodiments, the fixing assembly is rigidly connected to one end of the motor housing via a first fastener, and adhesive is provided between the first fastener and the fixing assembly.

[0016] In some embodiments, the motor housing includes a barrel and an end cover, the end cover includes a first end cover and a second end cover, along the axis direction of the motor shaft, the barrel includes a first end and a second end opposite to each other, the first end cover is arranged at the first end of the barrel, the second end cover is arranged at the second end of the barrel, the first induction member is sleeved on the motor shaft and is located outside the motor housing. The fixing assembly is connected to the first end of the barrel, and the first induction member abuts against the first end cover.

[0017] In some embodiments, the motor housing includes a barrel and an end cover, the end cover includes a first end cover and a second end cover, along the axial direction of the motor shaft, the barrel includes a first end and a second end opposite to each other, the first end cover is arranged at the first end of the barrel, the second end cover is arranged at the second end of the barrel, the first induction member is sleeved on the motor shaft and is located outside the motor housing. The fixing assembly is connected to the second end of the barrel, and the first induction member abuts against the second end cover.

[0018] In certain embodiments, the motor body further includes a gasket, which is sleeved on the motor shaft, and the first induction member abuts against the end cover through the gasket.

[0019] In some embodiments, the first induction member is a magnetic member; the gasket is made of a magnetic-insulating material; and / or at least a portion of the motor shaft for mounting the first induction member is made of a magnetic-insulating material.

[0020] In some embodiments, the first end cover and the barrel are separate structures.

[0021] In some embodiments, the first end cover and the barrel are an integrally formed structure.

[0022] In some embodiments, the second end cover and the barrel are separate structures.

[0023] In some embodiments, the second end cover and the barrel are integrally formed.

[0024] In some embodiments, the motor body further includes an elastic member, which is sleeved on the motor shaft and located in the motor housing, and the elastic member is used to apply an elastic force to the motor shaft so that the first induction member abuts against the motor housing.

[0025] In some embodiments, the motor housing includes a first end and a second end relative to each other, and the first end of the motor housing is closer to the position detection device than the second end of the motor housing; the motor body also includes a first washer and a limit block, and the first washer is fixedly sleeved and connected to the motor shaft; the limit block is fixedly sleeved and connected to the motor shaft, and the limit block is located on the side of the first washer away from the first end of the motor housing, and the opposite ends of the elastic member are respectively abutted against the first washer and the limit block.

[0026] In some embodiments, the motor housing includes a first end and a second end opposite to each other, and the first end of the motor housing is closer to the position detection device than the second end of the motor housing; the motor body also includes a first washer, a stop block and a second washer. The first washer is fixedly sleeved and connected to the motor shaft; the stop block is fixedly sleeved and connected to the motor shaft, and the stop block is located on the side of the first washer away from the first end of the motor housing; the second washer is fixedly sleeved and connected to the motor shaft, and the second washer is located between the first washer and the stop block, and the opposite ends of the elastic member are respectively in contact with the first washer and the second washer.

[0027] In some embodiments, one end of the elastic member is connected to the motor shaft, and the other end is connected to the motor housing, so that the elastic member applies the elastic force to the motor shaft.

[0028] In some embodiments, the motor body also includes a bearing, the bearing includes a bearing outer ring and a bearing inner ring, the bearing outer ring is fixedly disposed on the motor housing, the bearing inner ring is sleeved and installed on the motor shaft, and the bearing inner ring can rotate relative to the bearing outer ring together with the motor shaft.

[0029] In some embodiments, the first induction member is tightly matched with the motor shaft directly or indirectly.

[0030] In some embodiments, the first induction member is glued to the motor shaft directly or indirectly.

[0031] In some embodiments, the fixing assembly includes a fixing member and a circuit board component, the fixing member is rigidly connected to one end of the motor housing; the circuit board component is rigidly mounted on the end of the fixing member away from the motor housing, and the second sensing member is fixedly mounted on the circuit board component.

[0032] In certain embodiments, the fixing member and / or the motor housing are made of metal material, and the fixing member is rigidly connected to the motor housing.

[0033] In certain embodiments, the bracket assembly is rigidly connected to the motor housing.

[0034] In some embodiments, the bracket assembly is fixedly connected to the motor housing via a second fastener, and adhesive is provided between the second fastener and the bracket assembly.

[0035] In some embodiments, the bracket assembly is fixedly connected to the motor housing via a second fastener, and adhesive is provided between the second fastener and the motor housing.

[0036] In some embodiments, the electric toothbrush also includes a mounting plate, which is disposed between the motor housing and the bracket assembly. The second fastener passes through the bracket assembly and the mounting plate in sequence and is locked with the motor housing to fix the bracket assembly to the motor housing.

[0037] In the electric toothbrush with position detection function of the embodiment of the present application, the motor body and the position detection device are positioned and constrained by the same bracket assembly to form a non-moving fit between the motor housing and the bracket assembly, and / or a non-moving fit between the position detection device and the bracket assembly. Therefore, compared with the electric toothbrush in the related art, there is a relative constraint between the motor body and the position detection device, thereby preventing the relative position between the motor body and the position detection device from changing during the operation of the motor, that is, ensuring the relative position between the motor body and the position detection device is stable, thereby improving the reliability of the position detection device in detecting the motion position of the motor shaft.

[0038] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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:

[0040] Figure 1 is a schematic diagram of the three-dimensional structure of an electric toothbrush according to some embodiments of the present application;

[0041] Figure 2 yes Figure 1 A perspective exploded schematic diagram of an electric toothbrush shown;

[0042] Figure 3 yes Figure 1 A three-dimensional exploded schematic diagram of the electric toothbrush shown in another perspective;

[0043] Figure 4 yes Figure 1 A schematic cross-sectional view of an electric toothbrush shown;

[0044] Figure 5 yes Figure 1 The three-dimensional structural diagram of the motor in the electric toothbrush shown;

[0045] Figure 6 yes Figure 5 A three-dimensional exploded schematic diagram of the motor shown;

[0046] Figure 7 yes Figure 5 A schematic cross-sectional view of the motor shown;

[0047] Figure 8 yes Figure 7 The enlarged schematic diagram shown at position VIII in the middle.

[0048] Description of main component symbols:

[0049] Electric toothbrush 100;

[0050] The bracket assembly 10, the positioning cavity 101, the bracket body 11, the first receiving groove 111, the cover body 13, and the second receiving groove 131;

[0051] Motor 20, first end 201, second end 203, motor body 21, motor housing 211, barrel 2111, first end 2112, second end 2113, end cover 2114, first end cover 2115, second end cover 2116, mounting groove 2117, side wall 2118, bottom wall 2119, motor shaft 213, gasket 214, elastic member 215, first washer 216, stop block 217, second washer 218, bearing 219, position detection device 23, fixing assembly 231, fixing member 2311, circuit board component 2313, second induction member 233, first induction member 25;

[0052] The limiting component 30 , the first limiting member 31 , the second limiting member 33 ; the mounting plate 40 ; the brush head component 50 ; and the second fastening member 60 . DETAILED DESCRIPTION

[0053] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0054] In the description of the present application, it should be understood that the terms "thickness", "upper", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0055] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. In an example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection, or they can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.

[0056] See also Figure 1 and Figure 2 The electric toothbrush 100 of the embodiment of the present application includes a bracket assembly 10 and a motor 20. The motor 20 includes a motor body 21 and a position detection device 23. The motor body 21 is installed on the bracket assembly 10, and includes a motor housing 211 and a motor shaft 213. The motor shaft 213 is installed on the motor housing 211 and can move relative to the motor housing 211. The position detection device 23 is arranged at one end of the motor housing 211. The position detection device 23 is used to sense the moving position of the motor shaft 213. The motor body 21 and the position detection device 23 are positioned and constrained by the same bracket assembly 10, so that a non-moving fit is formed between the motor housing 211 and the bracket assembly 10, and / or a non-moving fit is formed between the position detection device 23 and the bracket assembly 10.

[0057] Among them, the bracket assembly 10 is a structure for loading the motor 20 and other components of the electric toothbrush 100 (such as batteries, etc.). The material of the bracket assembly 10 includes but is not limited to metal materials or non-metallic materials, wherein the metal materials include but are not limited to aluminum, iron, steel or aluminum alloy, etc., and the non-metallic materials include but are not limited to plastics, etc. In one example, the bracket assembly 10 can be made of a metal material and a non-metallic material, thereby making the structural strength of the bracket assembly 10 higher, preventing the bracket assembly 10 from being damaged during the operation of the electric toothbrush 100, and improving the stability and reliability of the electric toothbrush 100. In another example, the bracket assembly 10 can be made of a non-metallic material, thereby making the weight of the bracket assembly 10 lighter, which is conducive to achieving the lightweight of the electric toothbrush 100.

[0058] The electric toothbrush 100 may further include a brush head assembly 50, which is connected to the motor shaft 213. When the motor 20 is running stably, the motor 20 can drive the brush head assembly 50 to move through the motor shaft 213. The motor 20 includes but is not limited to a linear motor, a rotary motor, and a bidirectional motor. When the motor 20 is a linear motor, the position detection device 23 senses the movement position of the motor shaft 213, that is, the position detection device 23 detects the telescopic position of the motor shaft 213, and controls the movement of the brush head assembly 50 of the electric toothbrush 100 according to the telescopic position of the motor shaft 213; when the motor 20 is a rotary motor, the position detection device 23 senses the movement position of the motor shaft 213, that is, the position detection device 23 detects the rotation angle of the motor shaft 213, and controls the sweeping angle of the brush head assembly 50 according to the rotation angle of the motor shaft 213.

[0059] Specifically, in one embodiment, when the motor body 21 and the position detection device 23 are positioned and constrained by the same bracket assembly 10, a non-motion fit is formed between the motor housing 211 and the bracket assembly 10. In another embodiment, when the motor body 21 and the position detection device 23 are positioned and constrained by the same bracket assembly 10, a non-motion fit is formed between the position detection device 23 and the bracket assembly 10. In yet another embodiment, when the motor body 21 and the position detection device 23 are positioned and constrained by the same bracket assembly 10, a non-motion fit is formed between the motor housing 211 and the bracket assembly 10, and a non-motion fit is formed between the position detection device 23 and the bracket assembly 10.

[0060] Among them, a non-moving fit is formed between the motor housing 211 and the bracket assembly 10, that is, the motor housing 211 is fixed relative to the bracket assembly 10 in the direction of rotation with the axis of the motor shaft 213 as the axis; and / or, the motor housing 211 is fixed relative to the bracket assembly 10 in the axial direction X of the motor shaft 213; accordingly, a non-moving fit is formed between the position detection device 23 and the bracket assembly 10, that is, the position detection device 23 is fixed relative to the bracket assembly 10 in the direction of rotation with the axis of the motor shaft 213 as the axis; and / or, the position detection device 23 is fixed relative to the bracket assembly 10 in the axial direction X of the motor shaft 213, thereby forming a non-moving fit between the motor housing 211 and the bracket assembly 10. , a non-motion fit is formed between the position detection device 23 and the bracket assembly 10, which can improve the stability of the installation of the motor 20 on the bracket assembly 10, and prevent the relative position between the motor housing 211 and the position detection device 23 from changing during the operation of the motor 20, that is, prevent the distance between the motor housing 211 and the position detection device 23 in the axial direction X of the motor shaft 213, the radial direction of the motor shaft 213 or other directions from changing, thereby ensuring the relative position stability of the motor body 21 and the position detection device 23, thereby improving the reliability of the position detection device 23 in detecting the motion position of the motor shaft 213, and ensuring the effectiveness of the position detection device 23 in controlling the motion of the motor shaft 213.

[0061] The motor body 21 and the position detection device 23 are positioned and constrained by the same bracket assembly 10, that is, the motor body 21 and the position detection device 23 can be positioned and constrained by an integral bracket assembly 10. Therefore, compared with the two ends of the motor being respectively matched with different structural members to achieve installation and positioning, there is a relative constraint between the motor body 21 and the position detection device 23 in this embodiment, so that the position stability between the motor body 21 and the position detection device 23 can be improved, thereby improving the accuracy of the position detection device 23 detecting the motion position of the motor shaft 213. It should be noted that in some embodiments, the bracket assembly 10 may include only one structural member, that is, the bracket assembly 10 is made by an integrated molding process, so that the motor body 21 and the position detection device 23 are positioned and constrained by the same bracket assembly 10; or, the bracket assembly 10 includes at least two structural members, and the two structural members can be connected together to form an integral structure, so that the motor body 21 and the position detection device 23 are positioned and constrained by the same bracket assembly 10.

[0062] In the electric toothbrush 100 of the embodiment of the present application, the motor body 21 and the position detection device 23 are positioned and constrained by the same bracket assembly 10, so that a non-moving fit is formed between the motor housing 211 and the bracket assembly 10, and / or a non-moving fit is formed between the position detection device 23 and the bracket assembly 10. Therefore, compared with the electric toothbrush in the related art, there is a relative constraint between the motor body 21 and the position detection device 23, thereby preventing the relative position between the motor body 21 and the position detection device 23 from changing during the operation of the motor 20, that is, ensuring the relative position between the motor body 21 and the position detection device 23 is stable, thereby improving the reliability of the position detection device 23 detecting the moving position of the motor shaft 213.

[0063] In addition, in the related art, the two ends of the motor are respectively matched with different structural parts to achieve installation and positioning. Therefore, during the assembly of the motor, the two ends of the motor need to be matched with different structural parts in turn. However, due to the influence of assembly errors, positioning errors are easily generated between the two ends of the motor and the structural parts, and the positioning errors will cumulatively affect the installation and positioning of the motor. Therefore, when the motor is running, the motor is easily affected by vibration and produces shaking or displacement, affecting the normal operation of the electric toothbrush. In the embodiment of the present application, the motor body 21 and the position detection device 23 are positioned and constrained by the same bracket assembly 10, thereby preventing the motor 20 from being positioned multiple times with the structural parts and causing large errors, thereby improving the stability of the motor 20 installed on the bracket assembly 10 and ensuring the normal operation of the electric toothbrush 100.

[0064] The electric toothbrush 100 is further described below with reference to the accompanying drawings.

[0065] See also Figure 2 and Figure 3 In some embodiments, the bracket assembly 10 is formed with a bracket body 11 and a cover body 13 on the axial interface, the bracket body 11 is provided with a first receiving groove 111, and the cover body 13 is provided with a second receiving groove 131, the first receiving groove 111 and the second receiving groove 131 together form a positioning cavity 101, the motor 20 is installed in the positioning cavity 101, and the cover body 13 is rigidly connected to the bracket body 11, so that the motor housing 211 is fixed relative to the bracket assembly 10 in the direction of rotation with the axis of the motor shaft 213 as the axis, and / or the position detection device 23 is fixed relative to the bracket assembly 10 in the direction of rotation with the axis of the motor shaft 213 as the axis, and the motor housing 211 and the position detection device 23 are both fixed relative to the bracket assembly 10 in the axial direction of the motor shaft 213. Among them, the arrangement of the bracket body 11 and the cover body 13 can facilitate the assembly of the motor 20 in the bracket assembly 10 in the radial direction of the motor shaft 213, which is conducive to processing automation and improves the assembly efficiency of the electric toothbrush 100.

[0066] Specifically, in some embodiments, the first receiving groove 111 may be recessed from the side of the support body 11 opposite to the cover body 13 in a direction away from the cover body 13, and the second receiving groove 131 may be recessed from the side of the cover body 13 opposite to the support body 11 in a direction away from the support body 11. Wherein, when the support body 11 is connected to the cover body 13, the support body 11 and the cover body 13 can form a whole, the first receiving groove 111 and the second receiving groove 131 are opposite to each other to form a positioning cavity 101 together, and the positioning cavity 101 can accommodate the motor 20 and limit the position of the motor 20, thereby reducing the shaking of the motor 20 in the support assembly 10. It should be noted that, in some embodiments, the support body 11 and the cover body 13 can be connected by snap connection, threaded connection, bonding or welding. The threaded connection between the support body 11 and the cover body 13 can be: the support body 11 is connected to the cover body 13 by a fastener (such as a bolt or a screw, etc.). It can be understood that the fastener may include at least one, and the fastener may connect the bracket body 11 and the cover body 13 along the radial direction of the motor shaft 213 .

[0067] It can be understood that, in some embodiments, when the motor 20 is installed in the positioning cavity 101, the motor 20 may only cooperate with the bracket body 11 to fix the position of the motor housing 211 and / or the position detection device 23 relative to the bracket assembly 10. In other embodiments, when the motor 20 is installed in the positioning cavity 101, the motor 20 may only cooperate with the cover body 13 to fix the position of the motor housing 211 and / or the position detection device 23 relative to the bracket assembly 10. In still other embodiments, when the motor 20 is installed in the positioning cavity 101, the motor 20 may cooperate with both the bracket body 11 and the cover body 13 to fix the position of the motor housing 211 and / or the position detection device 23 relative to the bracket assembly 10.

[0068] Exemplarily, the assembly steps between the motor 20 and the bracket assembly 10 may be: first, place the motor 20 in the first receiving groove 111 so that the motor housing 211 and / or the position detection device 23 cooperate with the bracket body 11; then, connect the cover body 13 and the bracket body 11 so that the bracket body 11 and the cover body 13 are combined to form a whole, so that the assembly between the motor 20 and the bracket assembly 10 can be achieved. It should be noted that the above-mentioned assembly steps between the motor 20 and the bracket assembly 10 are only exemplary. In other embodiments, the assembly steps between the motor 20 and the bracket assembly 10 can also be in other forms, which are not illustrated one by one here.

[0069] Please continue reading Figure 2 and Figure 3In some embodiments, the bracket assembly 10 is rigidly connected to the motor housing 211. Specifically, the bracket assembly 10 is rigidly connected to the motor housing 211, that is, the relative position between the bracket assembly 10 and the motor housing 211 is fixed. At this time, the motor housing 211 can neither rotate relative to the bracket assembly 10 nor move relative to the bracket assembly 10. On the one hand, this makes the connection between the motor housing 211 and the bracket assembly 10 more secure; on the other hand, it can ensure that the relative position between the motor housing 211 and the position detection device 23 is fixed, thereby improving the accuracy of the position detection device 23 in detecting the motion position of the motor shaft 213.

[0070] Exemplarily, the bracket assembly 10 is fixedly connected to the motor housing 211 via the second fastener 60. The second fastener 60 can improve the connection strength between the second fastener 60 and the motor housing 211, and improve the stability of the connection between the second fastener 60 and the motor housing 211. It should be noted that, in some embodiments, the second fastener 60 may include but is not limited to bolts or screws, etc.; the first fastener 60 can connect the bracket assembly 10 and the motor housing 211 along the axial direction X of the motor shaft 213.

[0071] Furthermore, in some embodiments, adhesive is provided between the second fastener 60 and the bracket assembly 10. The provision of adhesive can improve the connection strength between the second fastener 60 and the bracket assembly 10, prevent the second fastener 60 and the bracket assembly 10 from loosening or falling off during the operation of the motor 20, thereby improving the stability of the connection between the bracket assembly 10 and the motor housing 211.

[0072] Glue is provided between the second fastener 60 and the motor housing 211. The provision of the glue can improve the connection strength between the second fastener 60 and the motor housing 211, prevent the second fastener 60 and the motor housing 211 from loosening or falling off during the operation of the motor 20, thereby improving the stability of the connection between the bracket assembly 10 and the motor housing 211.

[0073] In some embodiments, the electric toothbrush 100 also includes a mounting plate 40, which is disposed between the motor housing 211 and the bracket assembly 10. The second fastener 60 passes through the bracket assembly 10 and the mounting plate 40 in sequence and is locked with the motor housing 211 to fix the bracket assembly 10 to the motor housing 211.

[0074] Specifically, in some embodiments, the mounting plate 40 can be disposed at one end of the motor housing 211 close to the brush head assembly 50 and located in the positioning cavity 101. The mounting plate 40 can ensure that the motor 20 is accurately mounted on the bracket assembly 10, thereby improving the stability of the motor 20 mounted on the bracket assembly 10; on the other hand, the vibration generated when the motor 20 is running can be transmitted to the bracket assembly 10, thereby dispersing and reducing the influence of the vibration on the motor 20 itself, and ensuring the relative position stability between the motor body 21 and the position detection device 23.

[0075] See also Figure 2 and Figure 4 In some embodiments, the electric toothbrush 100 also includes a limiting component 30, which includes a first limiting member 31 and a second limiting member 33. One of the first limiting member 31 and the second limiting member 33 is disposed on the motor 20, and the other is disposed on the bracket assembly 10. The first limiting member 31 and the second limiting member 33 cooperate to limit the relative rotation between the motor 20 and the bracket assembly 10.

[0076] Specifically, in some embodiments, one of the first limiting member 31 and the second limiting member 33 may be disposed on the motor body 21 and / or the position detection device 23, and the other may be disposed on the bracket assembly 10 at a position corresponding to the first limiting member 31 or the second limiting member 33 on the motor 20, whereby the first limiting member 31 and the second limiting member 33 may cooperate to jointly limit the relative rotation between the motor 20 and the bracket assembly 10, thereby improving the relative position stability between the motor body 21 and the position detection device 23, and ensuring the reliability of the position detection device 23 detecting the motion position of the motor shaft 213. Exemplarily, in the case where the first limiting member 31 is disposed on the motor 20 and the second limiting member 33 is disposed on the bracket assembly 10, the first limiting member 31 may be a protrusion, that is, the protrusion is disposed on the motor body 21 and / or the position detection device 23, and accordingly, the second limiting member 33 may be a groove, and the protrusion cooperates with the groove to jointly limit the relative rotation between the motor 20 and the bracket assembly 10.

[0077] In some embodiments, the limiting assembly 30 includes at least two, and the first limiting members 31 of at least two limiting assemblies 30 are both disposed on the motor housing 211. Among them, the second limiting members 33 of at least two limiting assemblies 30 are both disposed at positions of the bracket assembly 10 corresponding to the first limiting members 31 on the motor housing 211, and the first limiting member 31 and the second limiting member 33 cooperate to limit the relative rotation between the motor housing 211 and the bracket assembly 10. It is understood that in other embodiments, the second limiting members 33 of at least two limiting assemblies 30 can also be disposed on the motor housing 211, and the first limiting members 31 of at least two limiting assemblies 30 can be disposed at positions of the bracket assembly 10 corresponding to the second limiting members 33 on the motor housing 211.

[0078] In other embodiments, the first limiting members 31 of at least two limiting assemblies 30 are both disposed on the position detection device 23. Among them, the second limiting members 33 of at least two limiting assemblies 30 are both disposed on the bracket assembly 10 at positions corresponding to the first limiting members 31 on the position detection device 23, and the first limiting member 31 and the second limiting member 33 cooperate to limit the relative rotation between the position detection device 23 and the bracket assembly 10. It is understandable that in other embodiments, the second limiting members 33 of at least two limiting assemblies 30 can also be disposed on the position detection device 23, and the first limiting members 31 of at least two limiting assemblies 30 can be disposed on the bracket assembly 10 at positions corresponding to the second limiting members 33 on the position detection device 23.

[0079] In some further embodiments, a portion of the first limiting members 31 of at least two limiting assemblies 30 are disposed on the motor housing 211, and another portion of the first limiting members 31 are disposed on the position detection device 23. Among them, a portion of the second limiting members 33 of at least two limiting assemblies 30 are disposed at a position of the bracket assembly 10 corresponding to the first limiting member 31 on the motor housing 211, and another portion of the second limiting members 33 are disposed at a position of the bracket assembly 10 corresponding to the first limiting member 31 on the position detection device 23, and the first limiting member 31 and the second limiting member 33 cooperate to limit the relative rotation between the motor 20 and the bracket assembly 10. It is understandable that in other embodiments, a portion of the second limiting members 33 of at least two limiting assemblies 30 may be disposed on the motor housing 211, and another portion of the second limiting members 33 may be disposed on the position detection device 23. Among them, a part of the first limiting members 31 of at least two limiting assemblies 30 is arranged at a position of the bracket assembly 10 corresponding to the second limiting member 33 on the motor housing 211, and another part of the first limiting member 31 is arranged at a position of the bracket assembly 10 corresponding to the second limiting member 33 on the position detection device 23.

[0080] Please combine Figure 4In some embodiments, in the axial direction of the motor shaft 213, the motor 20 includes a first end 201 and a second end 203 relative to each other, one of the first limiting member 31 and the second limiting member 33 is arranged at the first end 201 of the motor 20 and / or the second end 203 of the motor 20, and the other is arranged at a position of the bracket assembly 10 corresponding to the first limiting member 31 or the second limiting member 33 on the motor 20, and the first limiting member 31 cooperates with the second limiting member 33 to form a non-rotating fit between the first end 201 of the motor 20 and the bracket assembly 10, and / or a non-rotating fit between the second end 203 of the motor 20 and the bracket assembly 10.

[0081] In one example, one of the first limiting member 31 and the second limiting member 33 is disposed at the first end 201 of the motor 20, and the other is disposed at a position of the bracket assembly 10 corresponding to the first limiting member 31 or the second limiting member 33 on the motor 20. In another example, one of the first limiting member 31 and the second limiting member 33 is disposed at the second end 203 of the motor 20, and the other is disposed at a position of the bracket assembly 10 corresponding to the first limiting member 31 or the second limiting member 33 on the motor 20. In another example, one of the first limiting member 31 and the second limiting member 33 is arranged at the first end 201 of the motor 20 and the second end 203 of the motor 20, and the other is arranged at a position of the bracket assembly 10 corresponding to the first limiting member 31 or the second limiting member 33 on the motor 20. As a result, the restraining force on the motor 20 is more uniform, which can further improve the stability of the installation of the motor 20 in the bracket assembly 10, prevent the relative position between the motor housing 211 and the position detection device 23 from changing during the operation of the motor 20, thereby improving the reliability of the position detection device 23 in detecting the motion position of the motor shaft 213, and improving the effectiveness of the position detection device 23 in controlling the motion of the motor shaft 213.

[0082] See also Figure 5 and Figure 6 In some embodiments, the motor 20 further includes a first induction member 25, which is rigidly mounted on the motor shaft 213. The position detection device 23 includes a fixing assembly 231 and a second induction member 233, wherein the fixing assembly 231 is rigidly connected to one end of the motor housing 211; the second induction member 233 is rigidly mounted on the fixing assembly 231, and the first induction member 25 and the second induction member 233 cooperate to sense the moving position of the motor shaft 213.

[0083] Specifically, in some embodiments, the fixing component 231 is rigidly connected to the motor housing 211, that is, the fixing component 231 and the motor housing 211 are relatively fixed; accordingly, the second sensing member 233 is rigidly installed on the fixing component 231, that is, the second sensing member 233 and the fixing component 231 are relatively fixed. In addition, as can be seen from the above, the motor shaft 213 is installed on the motor housing 211 and can move relative to the motor housing 211. Therefore, the first sensing member 25 and the second sensing member 233 can both be positioned by the motor housing 211, thereby ensuring the stability and reliability of the cooperation between the first sensing member 25 and the second sensing member 233, thereby improving the detection accuracy of the position detection device 23.

[0084] Among them, one of the first sensing element 25 and the second sensing element 233 may be an electromagnetic sensor (such as a Hall sensor, etc.), a photoelectric sensor (such as a laser sensor, etc.) or an ultrasonic sensor, and the other of the first sensing element 25 and the second sensing element 233 may be a component that can cooperate with an electromagnetic sensor (such as a Hall sensor, etc.), a photoelectric sensor (such as a laser sensor, etc.) or an ultrasonic sensor, so that the first sensing element 25 and the second sensing element 233 can cooperate to jointly detect the moving position of the motor shaft 213. For example, when the second sensing element 233 is a Hall sensor, the first sensing element 25 may be a magnetic element, and the Hall sensor can cooperate with the magnetic element to jointly detect the moving position of the motor shaft 213, that is, the Hall sensor can detect the moving position of the motor shaft 213 according to the magnetic field of the magnetic element.

[0085] In some embodiments, the first induction member 25 is directly or indirectly tightly matched with the motor shaft 213, so that the first induction member 25 can be rigidly mounted on the motor shaft 213. Specifically, in some embodiments, the first induction member 25 is directly or indirectly tightly matched with the motor shaft 213, that is, the matching clearance between the first induction member 25 and the motor shaft 213 is small, or even no clearance, so that the stability of the connection between the first induction member 25 and the motor shaft 213 can be improved, and the first induction member 25 can be prevented from loosening or falling off from the motor shaft 213 during the operation of the motor 20. Therefore, on the one hand, the distance between the first induction member 25 and the second induction member 233 can be ensured to be stable, and the accuracy of the position detection device 23 detecting the motion position of the motor shaft 213 can be improved; on the other hand, the first induction member 25 can be prevented from falling off from the motor shaft 213 and affecting the operation of the motor 20, thereby ensuring the stability and reliability of the operation of the motor 20.

[0086] In other embodiments, the first induction member 25 is directly or indirectly glued to the motor shaft 213, so that the first induction member 25 can be rigidly mounted on the motor shaft 213, thereby improving the stability of the connection between the first induction member 25 and the motor shaft 213, preventing the first induction member 25 from loosening or falling off from the motor shaft 213 during the operation of the motor 20, and thus, on the one hand, ensuring the stability of the distance between the first induction member 25 and the second induction member 233, improving the accuracy of the position detection device 23 detecting the motion position of the motor shaft 213; on the other hand, preventing the first induction member 25 from falling off from the motor shaft 213 and affecting the normal operation of the motor 20, ensuring the stability and reliability of the operation of the motor 20. It should be noted that, in some embodiments, the adhesive used when gluing the first induction member 25 to the motor shaft 213 can be chloroprene adhesive, polyurethane adhesive or glue, etc., which is not limited here.

[0087] In some further embodiments, the first sensing member 25 is directly or indirectly tightly fitted with the motor shaft 213, and directly or indirectly glued, so that the first sensing member 25 can be rigidly mounted on the motor shaft 213, thereby further improving the stability of the connection between the first sensing member 25 and the motor shaft 213, ensuring the stability of the distance between the first sensing member 25 and the second sensing member 233, and improving the accuracy of the position detection device 23 in detecting the motion position of the motor shaft 213.

[0088] See also Figure 5 and Figure 6 In some embodiments, the fixing assembly 231 is rigidly connected to one end of the motor housing 211 through a first fastener (not shown), and the first fastener locks the motor housing 211 and the fixing assembly 231 along the radial direction of the motor shaft 213; and / or the first fastener locks the motor housing 211 and the fixing assembly 231 along the axial direction X of the motor shaft 213. The provision of the first fastener can improve the connection strength between the fixing assembly 231 and the motor housing 211, and improve the stability of the connection between the fixing assembly 231 and the motor housing 211. It should be noted that, in some embodiments, the first fastener can be a bolt or a screw, etc.

[0089] Furthermore, in some embodiments, adhesive is provided between the first fastener and the motor housing 211. The provision of adhesive can improve the connection strength between the first fastener and the motor housing 211, prevent the first fastener and the motor housing 211 from loosening or falling off during the operation of the motor 20, thereby improving the stability of the connection between the fixing assembly 231 and the motor housing 211.

[0090] Glue is provided between the first fastener and the fixing assembly 231. The provision of the glue can improve the connection strength between the first fastener and the fixing assembly 231, prevent the first fastener and the fixing assembly 231 from loosening or falling off during the operation of the motor 20, thereby improving the stability of the connection between the fixing assembly 231 and the motor housing 211.

[0091] In some embodiments, the fixing assembly 231 includes a fixing member 2311 and a circuit board component 2313, wherein the fixing member 2311 is rigidly connected to one end of the motor housing 211; the circuit board component 2313 is rigidly mounted on one end of the fixing member 2311 away from the motor housing 211, and the second induction member 233 is fixedly mounted on the circuit board component 2313. It can be understood that the fixing assembly 231 described in the above embodiment is rigidly connected to one end of the motor housing 211 through the first fastener, which can be: the fixing member 2311 is rigidly connected to one end of the motor housing 211 through the first fastener.

[0092] Specifically, in some embodiments, when the second sensing member 233 cooperates with the first sensing member 25 to detect the movement position of the motor shaft 213, the circuit board component 2313 can control the movement of the motor shaft 213 according to the detection result. For example, when the second sensing member 233 cooperates with the first sensing member 25 to detect the rotation angle of the motor shaft 213, the circuit board component 2313 can control the rotation of the motor shaft 213 according to the detected rotation angle, so as to achieve the brush head assembly 50 ( Figure 1 Control of the brushing angle).

[0093] In some embodiments, the fixing member 2311 and / or the motor housing 211 are made of metal material, and the fixing member 2311 is rigidly connected to the motor housing 211. It should be noted that in some embodiments, the metal material includes but is not limited to iron, stainless steel, aluminum or copper.

[0094] Among them, the fixing member 2311 and / or the motor housing 211 are made of metal materials, so that the structural strength of the fixing member 2311 and / or the motor housing 211 can be improved, the possibility of damage to the fixing member 2311 and the motor housing 211 can be reduced, the service life of the fixing member 2311 and the motor housing 211 can be extended, and the normal operation of the motor 20 can be ensured. In addition, the fixing member 2311 and the motor housing 211 are rigidly connected, thereby improving the stability of the connection between the fixing member 2311 and the motor housing 211, ensuring the stability of the relative position of the second sensing member 233 and the first sensing member 25 on the axial direction X of the motor shaft 213, and thus improving the reliability of the position detection device 23 detecting the motion position of the motor shaft 213.

[0095] See also Figure 6 and Figure 7In some embodiments, the motor housing 211 includes a barrel 2111 and an end cover 2114, the end cover 2114 includes a first end cover 2115 and a second end cover 2116, along the axial direction of the motor shaft 213, the barrel 2111 includes a first end 2112 and a second end 2113 opposite to each other, the first end cover 2115 is disposed at the first end 2112 of the barrel 2111, the second end cover 2116 is disposed at the second end 2113 of the barrel 2111, and the first induction member 25 is sleeved on the motor shaft 213 and is located outside the motor housing 211. The fixing assembly 231 is connected to the first end 2112 of the barrel 2111, and the first sensing element 25 is in contact with the first end cover 2115. As a result, the first sensing element 25 can be directly positioned and installed on the axial direction X of the motor shaft 213 through the first end cover 2115. Compared with traditional electric toothbrushes, the first sensing element 25 is positioned and installed less frequently, thereby preventing error accumulation caused by multiple positioning, that is, reducing the positioning error of the first sensing element 25 on the axial direction X of the motor shaft 213, ensuring the stability of the cooperation between the first sensing element 25 and the second sensing element 233, and thereby improving the reliability of the position detection device 23 in detecting the motion position of the motor shaft 213.

[0096] In other embodiments, the fixing assembly 231 is connected to the second end 2113 of the barrel 2111, and the first sensing member 25 is in contact with the second end cover 2116, so that the first sensing member 25 can be directly positioned and installed on the axial direction X of the motor shaft 213 through the second end cover 2116. Compared with traditional electric toothbrushes, the first sensing member 25 is positioned and installed less frequently, thereby preventing error accumulation caused by multiple positioning, that is, reducing the positioning error of the first sensing member 25 on the axial direction X of the motor shaft 213, ensuring the stability of the cooperation between the first sensing member 25 and the second sensing member 233, and thereby improving the reliability of the position detection device 23 in detecting the motion position of the motor shaft 213.

[0097] Please continue reading Figure 6 and Figure 7 In some embodiments, the motor body 21 further includes a gasket 214 , which is sleeved on the motor shaft 213 , and the first induction element 25 abuts against the end cover 2114 through the gasket 214 .

[0098] Specifically, in some embodiments, when the position detection device 23 is connected to the first end 2112 of the barrel 2111, the first sensor 25 can abut against the first end cover 2115 through the gasket 214; when the position detection device 23 is connected to the second end 2113 of the barrel 2111, the first sensor 25 can abut against the second end cover 2116 through the gasket 214. The provision of the gasket 214 can reduce the friction between the first sensor 25 and the end cover 2114 when the first sensor 25 moves relative to the motor housing 211 along with the motor shaft 213, thereby reducing the possibility of friction damage to the first sensor 25 or the end cover 2114, extending the service life of the first sensor 25, and improving the stability and reliability of the position detection device 23.

[0099] Since there are magnets and coils in the motor 20, if the first induction member 25 is a magnetic member, the magnetic field of the magnet or the magnetic field generated when the coil is energized may affect the magnetism of the first induction member 25, thereby affecting the accuracy of the position detection device 23 detecting the motion position of the motor shaft 213. In the embodiment of the present application, the first induction member 25 is a magnetic member; the gasket 214 is made of a magnetic isolation material, so that the gasket 214 can block the magnetic field, thereby preventing the magnetic field of the magnet in the motor 20 or the magnetic field generated when the coil is energized from affecting the magnetism of the first induction member 25, thereby ensuring the accuracy of the position detection device 23 detecting the motion position of the motor shaft 213.

[0100] It should be noted that, in some embodiments, the magnetic isolation material includes but is not limited to aluminum or copper, that is, the gasket 214 is made of aluminum or copper. It is understandable that, in other embodiments, the material of the gasket 214 can also be plastic or rubber. Among them, plastic includes but is not limited to polytetrafluoroethylene (PTFE), nylon or polyurethane, etc.; rubber includes but is not limited to natural rubber, nitrile rubber or chloroprene rubber, etc.

[0101] In some embodiments, the first sensing member 25 is a magnetic member, and at least a portion of the motor shaft 213 used to mount the first sensing member 25 is made of magnetic isolation material. This can prevent the magnetic field of the magnet in the motor 20 or the magnetic field generated when the coil is energized from being transmitted along the motor shaft 213 to the first sensing member 25, causing the magnetism of the first sensing member 25 to be affected, thereby improving the accuracy of the position detection device 23 in detecting the motion position of the motor shaft 213.

[0102] In some embodiments, the first end cap 2115 and the barrel 2111 are split structures, which can facilitate the repair or replacement of the components inside the motor housing 211 (including but not limited to the rotor and the stator, etc.). For example, in the case where the components inside the motor housing 211 are damaged, the split structure can facilitate the disassembly of the motor housing 211 to repair or replace the components inside the motor housing 211, thereby ensuring the normal operation of the motor 20. In one example, the first end cap 2115 and the barrel 2111 can be combined together in a detachable connection method, and the detachable connection method includes but is not limited to a snap connection or a threaded connection. In another example, the first end cap 2115 and the barrel 2111 can be combined together in a non-detachable connection method, and the non-detachable connection method includes but is not limited to bonding or welding.

[0103] In other embodiments, the first end cap 2115 and the barrel 2111 are an integrally formed structure. Thus, when the position detection device 23 is connected to the first end 2112 of the barrel 2111, compared with the need for the first end cap 2115 to be installed and coordinated with the barrel 2111, that is, compared with the first end cap 2115 and the barrel 2111 being a separate structure, the integrally formed structure can avoid positioning errors when the first end cap 2115 and the barrel 2111 are installed, thereby further reducing the positioning error of the first sensing element 25 when it is positioned and installed through the first end cap 2115, thereby improving the stability and reliability of the coordination between the first sensing element 25 and the second sensing element 233, and ensuring the detection accuracy of the position detection device 23.

[0104] In some embodiments, the second end cap 2116 and the barrel 2111 are split structures, which can facilitate the repair or replacement of the components inside the motor housing 211. For example, when the components inside the motor housing 211 are damaged, the split structure can facilitate the disassembly of the motor housing 211 to repair or replace the components inside the motor housing 211, thereby ensuring the normal operation of the motor 20. In one example, the second end cap 2116 and the barrel 2111 can be combined together in a detachable connection manner, and the detachable connection manner includes but is not limited to a snap connection or a threaded connection. In another example, the second end cap 2116 and the barrel 2111 can be combined together in a non-detachable connection manner, and the non-detachable connection manner includes but is not limited to bonding or welding.

[0105] In other embodiments, the second end cap 2116 and the barrel 2111 are an integrally formed structure. Thus, when the position detection device 23 is connected to the second end 2113 of the barrel 2111, compared with the need for the second end cap 2116 to be installed and coordinated with the barrel 2111, that is, compared with the second end cap 2116 and the barrel 2111 being a separate structure, the integrally formed structure can avoid positioning errors when the second end cap 2116 and the barrel 2111 are installed, thereby further reducing the positioning error of the first sensing element 25 when it is positioned and installed through the second end cap 2116, thereby improving the stability and reliability of the coordination between the first sensing element 25 and the second sensing element 233, and ensuring the detection accuracy of the position detection device 23.

[0106] It can be understood that, in the embodiment of the present application, the arrangement of the motor housing 211 may include: the first end cover 2115 and the barrel 2111 are split structures, and the second end cover 2116 and the barrel 2111 are split structures; or, the first end cover 2115 and the barrel 2111 are an integrally formed structure, and the second end cover 2116 and the barrel 2111 are an integrally formed structure; or, the first end cover 2115 and the barrel 2111 are split structures, and the second end cover 2116 and the barrel 2111 are an integrally formed structure; or, the first end cover 2115 and the barrel 2111 are split structures, and the second end cover 2116 and the barrel 2111 are integrally formed structures.

[0107] In some embodiments, the motor body 21 further includes an elastic member 215, which is sleeved on the motor shaft 213 and located in the motor housing 211. The elastic member 215 is used to apply an elastic force to the motor shaft 213 so that the first sensing member 25 abuts against the motor housing 211. The setting of the elastic member 215 can prevent the first sensing member 25 from moving relative to the motor housing 211 in the axial direction X of the motor shaft 213 during the operation of the motor 20, thereby ensuring the stability of the relative position of the first sensing member 25 and the second sensing member 233, and improving the accuracy of the position detection device 23 detecting the motion position of the motor shaft 213. It should be noted that in some embodiments, the elastic member 215 may include but is not limited to a spring (including but not limited to a tension spring, a compression spring or a torsion spring, etc.), a rubber member or a silicone member, etc.

[0108] In some embodiments, the motor housing 211 includes a first end and a second end opposite to each other, and the first end of the motor housing 211 is closer to the position detection device 23 than the second end of the motor housing 211. The motor body 21 also includes a first washer 216 and a stopper 217, wherein the first washer 216 is fixedly sleeved and connected to the motor shaft 213; the stopper 217 is fixedly sleeved and connected to the motor shaft 213, and the stopper 217 is located on a side of the first washer 216 away from the first end of the motor housing 211, and opposite ends of the elastic member 215 are respectively in contact with the first washer 216 and the stopper 217.

[0109] Specifically, in some embodiments, when the position detection device 23 is connected to the first end 2112 of the barrel 2111, the elastic member 215 can apply an elastic force to the motor shaft 213 through the limit block 217, and the elastic force can move the motor shaft 213 in the direction from the first end cover 2115 to the second end cover 2116, so that the first sensing member 25 abuts against the first end cover 2115; when the position detection device 23 is connected to the second end 2113 of the barrel 2111, the elastic member 215 can apply an elastic force to the motor shaft 213 through the limit block 217, and the elastic force can move the motor shaft 213 in the direction from the first end cover 2115 to the second end cover 2116, so that the first sensing member 25 abuts against the first end cover 2115. The motor shaft 213 can be moved in the direction from the second end cover 2116 to the first end cover 2115 by applying force, so that the first sensing member 25 abuts against the second end cover 2116. Thus, the setting of the elastic member 215 can ensure that the first sensing member 25 is fixed in the axial direction X of the motor shaft 213 (parallel to the direction from the first end cover 2115 to the second end cover 2116; or the direction from the second end cover 2116 to the first end cover 2115), thereby ensuring the stability of the cooperation between the first sensing member 25 and the second sensing member 233, and further ensuring the reliability of the position detection device 23 in detecting the movement position of the motor shaft 213.

[0110] Furthermore, in some embodiments, the motor body 21 further includes a second washer 218. The second washer 218 is fixedly sleeved and connected to the motor shaft 213, and the second washer 218 is located between the first washer 216 and the limit block 217, and the opposite ends of the elastic member 215 are respectively in contact with the first washer 216 and the second washer 218.

[0111] Specifically, in some embodiments, when the motor shaft 213 rotates relative to the motor housing 211, the first washer 216 and the second washer 218 can rotate relative to the motor housing 211 together with the motor shaft 213. The opposite ends of the elastic member 215 are respectively in contact with the first washer 216 and the second washer 218. When the position detection device 23 is connected to the first end 2112 of the barrel 2111, the elastic member 215 can apply an elastic force to the motor shaft 213 through the second washer 218, so that the first sensing member 25 is in contact with the first end cover 2115; when the position detection device 23 is connected to the second end 2113 of the barrel 2111, the elastic member 215 can apply an elastic force to the motor shaft 213 through the second washer 218, so that the first sensing member 25 is in contact with the second end cover 2116. The provision of the first washer 216 and the second washer 218 can reduce the friction between the elastic member 215 and the bearing 219 and the limit block 217 , thereby reducing the possibility of damage to the elastic member 215 , the bearing 219 and the limit block 217 , thereby ensuring the normal operation of the motor 20 .

[0112] It should be noted that, in some embodiments, the materials of the first gasket 216 and the second gasket 218 may include but are not limited to metal, plastic or rubber, etc. Among them, metal includes but is not limited to aluminum, copper or stainless steel, etc.; plastic includes but is not limited to polytetrafluoroethylene (PTFE), nylon or polyurethane, etc.; rubber includes but is not limited to natural rubber, nitrile rubber or chloroprene rubber, etc.

[0113] In other embodiments, one end of the elastic member 215 is connected to the motor shaft 213 , and the other end is connected to the motor housing 211 , so that the elastic member 215 applies an elastic force to the motor shaft 213 .

[0114] Exemplarily, the elastic member 215 may be a compression spring, which is always in a compressed state and applies an elastic force to the motor shaft 213 so that the first induction member 25 abuts against the motor housing 211 . Among them, when the position detection device 23 is connected to the first end 2112 of the barrel 2111, one end of the elastic member 215 is connected to the motor shaft 213, and the other end is connected to the first end cover 2115, and the elastic member 215 is in a compressed state, thereby, the elastic member 215 can apply an elastic force to the motor shaft 213 that moves along the direction from the first end cover 2115 to the second end cover 2116, so that the first sensing member 25 abuts against the first end cover 2115; when the position detection device 23 is connected to the second end 2113 of the barrel 2111, one end of the elastic member 215 is connected to the motor shaft 213, and the other end is connected to the second end cover 2116, and the elastic member 215 is in a compressed state, thereby, the elastic member 215 can apply an elastic force to the motor shaft 213 that moves along the direction from the second end cover 2116 to the first end cover 2115, so that the first sensing member 25 abuts against the second end cover 2116.

[0115] See also Figure 6 and Figure 7 In some embodiments, the motor body 21 further includes a bearing 219, and the bearing 219 includes a bearing outer ring and a bearing inner ring. The bearing outer ring is fixedly arranged on the motor housing 211, and the bearing inner ring is sleeved and installed on the motor shaft 213. The bearing inner ring can rotate relative to the bearing outer ring together with the motor shaft 213. Among them, the setting of the bearing 219 can reduce the friction between the motor shaft 213 and the motor housing 211, and avoid the motor shaft 213 directly contacting the motor housing 211, resulting in excessive friction between the motor shaft 213 and the motor housing 211, thereby reducing the energy loss generated during the operation of the motor 20 and ensuring the operation efficiency of the motor 20. It should be noted that, in some embodiments, the bearing 219 includes but is not limited to rolling bearings, sliding bearings, spherical bearings, and oil-containing bearings.

[0116] In some embodiments, the end cover 2114 is provided with a mounting groove 2117 , which is recessed from a side of the end cover 2114 opposite to the first sensing element 25 toward the first sensing element 25 , and the bearing 219 is disposed in the mounting groove 2117 .

[0117] Specifically, please combine Figure 8 In certain embodiments, when the position detection device 23 is connected to the first end 2112 of the barrel 2111, the mounting groove 2117 is recessed from the side of the first end cover 2115 opposite to the second end cover 2116 toward a direction away from the second end cover 2116, the bearing 219 is disposed in the mounting groove 2117, and the outer ring of the bearing is relatively fixed to the side wall 2118 of the mounting groove 2117; when the position detection device 23 is connected to the second end 2113 of the barrel 2111, the mounting groove 2117 is recessed from the side of the second end cover 2116 opposite to the first end cover 2115 toward a direction away from the first end cover 2115, the bearing 219 is disposed in the mounting groove 2117, and the outer ring of the bearing is relatively fixed to the side wall 2118 of the mounting groove 2117. Among them, the setting of the installation groove 2117 can facilitate the positioning and installation of the bearing 219 on the one hand. For example, when the bearing 219 abuts against the bottom wall 2119 of the installation groove 2117, it can be determined that the bearing 219 is installed in place, thereby improving the assembly efficiency of the motor 20; on the other hand, it can avoid interference between the bearing 219 and other components in the motor housing 211, thereby ensuring the normal operation of the motor 20.

[0118] In the description of this specification, the descriptions with reference to the terms "certain embodiments", "in an example", "exemplarily", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0119] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electric toothbrush with a position detection function, characterized in that: include: Bracket assembly; and A motor, wherein the motor comprises a motor body and a position detection device, wherein the motor body is mounted on the bracket assembly and comprises a motor housing and a motor shaft, wherein the motor shaft is mounted on the motor housing and can move relative to the motor housing, wherein the position detection device is disposed at one end of the motor housing, wherein the position detection device is used to sense the moving position of the motor shaft, wherein the motor body and the position detection device are positioned and constrained by the same bracket assembly so that a non-moving fit is formed between the motor housing and the bracket assembly, and / or a non-moving fit is formed between the position detection device and the bracket assembly.

2. The electric toothbrush according to claim 1, characterized in that: The bracket assembly is formed with a bracket body and a cover body on an axial dividing interface, the bracket body is provided with a first accommodating groove, the cover body is provided with a second accommodating groove, the first accommodating groove and the second accommodating groove together form a positioning cavity, the motor is installed in the positioning cavity, and the cover body is rigidly connected to the bracket body so that the motor housing is fixed relative to the bracket assembly in the direction of rotation with the axis of the motor shaft as the axis, and / or the position detection device is fixed relative to the bracket assembly in the direction of rotation with the axis of the motor shaft as the axis, and the motor housing and the position detection device are both fixed relative to the bracket assembly in the axial direction of the motor shaft.

3. The electric toothbrush according to claim 1, characterized in that: The electric toothbrush also includes: A limiting component, the limiting component includes a first limiting member and a second limiting member, one of the first limiting member and the second limiting member is arranged on the motor, and the other is arranged on the bracket assembly, the first limiting member and the second limiting member cooperate to limit the relative rotation between the motor and the bracket assembly.

4. The electric toothbrush according to claim 3, characterized in that: The limiting components include at least two; The first limiting members of at least two of the limiting assemblies are both arranged on the motor housing; or The first limiting members of at least two of the limiting assemblies are both arranged on the position detection device; or A portion of the first limiting members in at least two of the limiting assemblies is arranged on the motor housing, and another portion of the first limiting members is arranged on the position detection device.

5. The electric toothbrush according to claim 3, characterized in that: In the axial direction of the motor shaft, the motor includes a first end and a second end relative to each other, one of the first limiting member and the second limiting member is arranged at the first end of the motor and / or the second end of the motor, and the other is arranged at a position of the bracket assembly corresponding to the first limiting member or the second limiting member on the motor, and the first limiting member cooperates with the second limiting member to form a non-rotating fit between the first end of the motor and the bracket assembly, and / or a non-rotating fit between the second end of the motor and the bracket assembly.

6. The electric toothbrush according to any one of claims 1 to 5, characterized in that: The motor further comprises a first induction member, which is rigidly mounted on the motor shaft; the position detection device comprises: A fixing assembly, the fixing assembly being rigidly connected to one end of the motor housing; and The second induction member is rigidly mounted on the fixing assembly, and the first induction member and the second induction member cooperate to sense the moving position of the motor shaft.

7. The electric toothbrush according to claim 6, characterized in that: The fixing assembly is rigidly connected to one end of the motor housing through a first fastener. The first fastener locks the motor housing and the fixing assembly along the radial direction of the motor shaft; or, The first fastener locks the motor housing and the fixing assembly along the axial direction of the motor shaft; and / or Adhesive is provided between the first fastener and the motor housing; and / or Adhesive is provided between the first fastener and the fixing assembly.

8. The electric toothbrush according to claim 6, characterized in that: The motor housing comprises a barrel and an end cover, wherein the end cover comprises a first end cover and a second end cover, and along the axial direction of the motor shaft, the barrel comprises a first end and a second end opposite to each other, the first end cover is arranged at the first end of the barrel, and the second end cover is arranged at the second end of the barrel, and the first induction member is sleeved on the motor shaft and located outside the motor housing; The fixing assembly is connected to the first end of the barrel, and the first sensing element is in contact with the first end cover; or The fixing assembly is connected to the second end of the barrel, and the first sensing element is in contact with the second end cover.

9. The electric toothbrush according to claim 8, characterized in that: The motor body further comprises a gasket, which is sleeved on the motor shaft, and the first induction member is in contact with the end cover via the gasket.

10. The electric toothbrush according to claim 9, characterized in that: The first induction member is a magnetic member; The gasket is made of magnetic isolation material; and / or At least a portion of the motor shaft for mounting the first induction element is made of magnetic isolation material.

11. The electric toothbrush according to claim 8, characterized in that: The first end cover and the barrel are separate structures; or The first end cover and the barrel are an integrally formed structure; or The second end cover and the barrel are separate structures; or The second end cover and the barrel are integrally formed.

12. The electric toothbrush according to claim 8, characterized in that: The motor body also includes: An elastic member is sleeved on the motor shaft and located in the motor housing. The elastic member is used to apply an elastic force to the motor shaft so that the first induction member abuts against the motor housing.

13. The electric toothbrush according to claim 12, characterized in that: The motor housing comprises a first end and a second end opposite to each other, wherein the first end of the motor housing is closer to the position detection device than the second end of the motor housing; the motor body further comprises: A first washer, the first washer is fixedly sleeved and connected to the motor shaft; and A limit block is fixedly sleeved and connected to the motor shaft, the limit block is located on a side of the first end of the first washer away from the motor housing, and opposite ends of the elastic member are respectively in contact with the first washer and the limit block.

14. The electric toothbrush according to claim 12, characterized in that: The motor housing comprises a first end and a second end opposite to each other, wherein the first end of the motor housing is closer to the position detection device than the second end of the motor housing; the motor body further comprises: A first washer, the first washer is fixedly sleeved and connected to the motor shaft; a limit block, wherein the limit block is fixedly sleeved and connected to the motor shaft, and the limit block is located on a side of the first washer that is away from the first end of the motor housing; and The second washer is fixedly sleeved and connected to the motor shaft, the second washer is located between the first washer and the limit block, and the opposite ends of the elastic member are respectively in contact with the first washer and the second washer.

15. The electric toothbrush according to claim 12, characterized in that: One end of the elastic member is connected to the motor shaft, and the other end is connected to the motor housing, so that the elastic member applies the elastic force to the motor shaft.

16. The electric toothbrush according to claim 1, characterized in that The motor body also includes: The bearing comprises a bearing outer ring and a bearing inner ring, wherein the bearing outer ring is fixedly arranged on the motor housing, and the bearing inner ring is sleeved and installed on the motor shaft, and the bearing inner ring can rotate relative to the bearing outer ring together with the motor shaft.

17. The electric toothbrush according to claim 6, characterized in that: The first induction member is tightly matched with the motor shaft directly or indirectly; and / or The first induction member is glued to the motor shaft directly or indirectly.

18. The electric toothbrush according to claim 6, characterized in that The fixing assembly comprises: A fixing member, the fixing member being rigidly connected to one end of the motor housing; and A circuit board component is rigidly mounted on an end of the fixing component away from the motor housing, and the second induction component is fixedly mounted on the circuit board component.

19. The electric toothbrush according to claim 18, characterized in that The fixing member and / or the motor housing are made of metal material, and the fixing member is rigidly connected to the motor housing.

20. The electric toothbrush according to claim 1, characterized in that The bracket assembly is rigidly connected to the motor housing.

21. The electric toothbrush according to claim 20, characterized in that The bracket assembly is fixedly connected to the motor housing via a second fastener; Adhesive is provided between the second fastener and the bracket assembly; and / or Adhesive is provided between the second fastener and the motor housing.

22. The electric toothbrush according to claim 21, characterized in that The electric toothbrush also includes: A mounting plate is disposed between the motor housing and the bracket assembly, and a second fastener passes through the bracket assembly and the mounting plate in sequence and is locked with the motor housing to fix the bracket assembly to the motor housing.

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