Motor and electric toothbrush

Abstract

The embodiment of the utility model provides a motor and an electric toothbrush. The motor comprises a motor body and a position detection device. The motor body 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 motor shell comprises a cylinder part and an end cover installed at any end of the cylinder part. The position detection device is installed at one end of the motor shell and comprises a first induction piece and a second induction piece, the first induction piece is directly or indirectly connected with an end cover at the end of the motor shell in an abutting mode so as to be matched with the end cover to be located and installed on the motor shaft, and the first induction piece can move along with the motor shaft. The second induction piece is arranged on the side, opposite to the end cover, of the first induction piece, and the second induction piece is used for being matched with the first induction piece so as to induce the movement position of the motor shaft. According to the position detection device, the first induction part and the end cover are abutted and matched for positioning, so that the positioning error of the first induction part in the axial direction of the motor shaft can be reduced, and the detection reliability of the position detection device is improved.

Description

Technical Field

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

[0002] An electric toothbrush is usually provided with a motor and a detection device, and the detection device can detect the movement position of the motor shaft of the motor, so as to control the movement of the brush head assembly of the electric toothbrush. In the related art, the detection device includes a detection member and a sensing member, and the sensing member is arranged on the motor shaft, and the detection member can cooperate with the sensing member to detect the rotation angle of the motor shaft. However, there are many structural parts of the motor. For example, in addition to the motor shaft, the motor also includes a motor housing, an end cover, a bearing and a loading member arranged on the motor shaft, etc. Since the end cover is positioned and installed on the barrel of the motor housing, the bearing is positioned and installed in the end cover, the loading member is installed on the motor shaft and positioned by the bearing, and the sensing member is positioned and installed on the loading member, therefore, in the axial direction of the motor shaft, the positioning error between the end cover and the barrel, the positioning error between the bearing and the end cover, the positioning error between the loading member and the bearing, and the positioning error between the sensing member and the loading member will accumulate into the final positioning error of the sensing member, resulting in a large error in the installation position of the sensing member in the axial direction of the motor shaft, which in turn leads to a large deviation in the cooperation with the detection member, and the problem of detection failure occurs. Utility Model Content

[0003] In view of the above problems, the present application provides a motor and an electric toothbrush, which can avoid the problem of large errors in the installation position of the sensing component in the axial direction of the motor shaft, resulting in large deviations in the cooperation with the detection component and detection failure.

[0004] The motor of the embodiment of the present application includes a motor body and a position detection device. The motor body 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, and the motor housing includes a barrel and an end cover installed on either end of the barrel. The position detection device is installed at one end of the motor housing, and the position detection device includes a first sensing member and a second sensing member, the first sensing member directly or indirectly abuts against the end cover at the end of the motor housing, so as to be installed on the motor shaft by cooperating with the end cover, the first sensing member can move with the motor shaft, the second sensing member is arranged on the side of the first sensing member opposite to the end cover, and the second sensing member is used to cooperate with the first sensing member to sense the moving position of the motor shaft.

[0005] In some embodiments, 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 second end of the barrel is closer to the load end of the motor than the first end of the barrel, 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 position detection device is arranged at the first end of the barrel, and the first induction member abuts against the first end cover.

[0006] In some embodiments, 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 second end of the barrel is closer to the load end of the motor than the first end of the barrel, 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 position detection device is arranged at the second end of the barrel, and the first induction member abuts against the second end cover.

[0007] 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.

[0008] In some embodiments, the first induction member is a magnetic member, the second induction member is a magnetic sensor, and the gasket is made of a magnetic isolation material.

[0009] In some embodiments, the first induction member is a magnetic member, the second induction member is a magnetic sensor, and at least a portion of the motor shaft for mounting the first induction member is made of magnetic isolation material.

[0010] In some embodiments, the first end cap and the barrel are separate structures, the second end cap and the barrel are integrally formed structures, the position detection device is disposed at the second end of the barrel, and the first sensing element abuts against the second end cap.

[0011] In some embodiments, the first end cap and the barrel are an integrally formed structure, the second end cap and the barrel are a separate structure, the position detection device is disposed at the first end of the barrel, and the first sensing element abuts against the first end cap.

[0012] In certain embodiments, the position detection device further includes a fixing component, wherein the fixing component is rigidly connected to the motor housing, and the second sensing element is rigidly mounted on the fixing component.

[0013] In some embodiments, the fixing assembly includes a positioning shell and a circuit board component, the positioning shell is rigidly connected to one end of the motor housing; the circuit board component is rigidly installed on one end of the positioning shell away from the motor housing, and the second sensing element is fixedly installed on the circuit board component.

[0014] In certain embodiments, the positioning shell and / or the motor shell are made of metal material, and the positioning shell is rigidly connected to the motor shell.

[0015] In some embodiments, the positioning shell is rigidly connected to the motor shell via a first fastener; the first fastener locks the motor shell and the positioning shell along the radial direction of the motor shaft.

[0016] In some embodiments, the positioning shell is rigidly connected to the motor shell via a first fastener; the first fastener locks the motor shell and the positioning shell along the axial direction of the motor shaft.

[0017] In some embodiments, the positioning shell is rigidly connected to the motor shell via a first fastener; and adhesive is provided between the first fastener and the motor shell.

[0018] In some embodiments, the positioning shell is rigidly connected to the motor shell via a first fastener; and adhesive is provided between the first fastener and the positioning shell.

[0019] 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 end cover, 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.

[0020] In some embodiments, the end cover is provided with a mounting groove, the mounting groove is recessed from a side of the end cover opposite to the first sensing component toward the first sensing component, and the bearing is disposed in the mounting groove.

[0021] In some embodiments, the motor body further includes a limit block, which is fixedly sleeved and connected to the motor shaft. The limit block is located on a side of the bearing away from the end cover and is spaced apart from the bearing.

[0022] In some embodiments, the motor body further includes a first washer and a second washer. The first washer is fixedly sleeved on the motor shaft and disposed on a side of the bearing away from the end cover, and the first washer is connected to the inner ring of the bearing; the second washer is fixedly sleeved on the motor shaft and located between the first washer and the limit block.

[0023] In some embodiments, the motor body also includes an elastic member, which is sleeved on the motor shaft and located in the motor housing. The opposite ends of the elastic member are respectively abutted against the bearing and the limit block. 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.

[0024] In some embodiments, the motor body also includes an elastic member, which is disposed in the motor housing, one end of the elastic member is connected to the motor shaft, and the other end is matched with the motor housing, and the elastic member is used to apply the elastic force to the motor shaft so that the first induction member abuts against the motor housing.

[0025] In some embodiments, the first induction member is tightly matched with the motor shaft directly or indirectly.

[0026] In some embodiments, the first induction member is glued to the motor shaft directly or indirectly.

[0027] The electric toothbrush of the embodiment of the present application comprises a bracket assembly and a motor of any one of the above embodiments, wherein the motor is mounted on the bracket assembly.

[0028] In certain embodiments, the motor housing forms a non-moving fit with the bracket assembly; and / or, the fixing assembly of the position detection device forms a non-moving fit with the bracket assembly.

[0029] 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.

[0030] In some embodiments, the limiting assembly includes at least two; the first limiting members of at least two of the limiting assemblies are both disposed on the motor housing.

[0031] In some embodiments, the limiting components include at least two; and the first limiting members of at least two of the limiting components are both disposed on the position detection device.

[0032] In some embodiments, the limiting assembly includes at least two; in at least two of the limiting assemblies, a portion of the first limiting members are disposed on the motor housing, and another portion of the first limiting members are disposed on the position detection device.

[0033] 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.

[0034] In the motor and electric toothbrush of the embodiments of the present application, the position detection device includes a first sensing member and a second sensing member. The first sensing member directly or indirectly abuts against the end cover of the one end of the motor housing so as to be installed on the motor shaft by cooperating with the end cover. Therefore, compared with the electric toothbrush in the related art, the first sensing member can be directly cooperating with the end cover to achieve installation on the motor shaft, thereby preventing error accumulation due to multiple positioning between structural parts, thereby reducing the positioning error of the first sensing member in the axial direction of the motor shaft, and thus improving the reliability of the position detection device in detecting the motion position of the motor shaft.

[0035] 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

[0036] 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:

[0037] Figure 1 is a schematic diagram of the three-dimensional structure of a motor in some embodiments of the present application;

[0038] Figure 2 yes Figure 1 A three-dimensional exploded schematic diagram of the motor shown;

[0039] Figure 3 yes Figure 1 A schematic cross-sectional view of the motor shown;

[0040] Figure 4 yes Figure 3 The enlarged schematic diagram shown at IV in the middle;

[0041] Figure 5 is a schematic diagram of the three-dimensional structure of an electric toothbrush according to some embodiments of the present application;

[0042] Figure 6 yes Figure 5 A three-dimensional exploded schematic diagram of a part of the structure of the electric toothbrush shown;

[0043] Figure 7 yes Figure 5 A cross-sectional schematic diagram of an electric toothbrush is shown.

[0044] Description of main component symbols:

[0045] Electric toothbrush 1000;

[0046] Motor 100, first end 101, second end 103; bracket assembly 200; limiting assembly 300, first limiting member 310, second limiting member 320; brush head assembly 400;

[0047] Motor body 10, motor housing 11, barrel 111, first end 1111, second end 1113, end cover 112, first end cover 1121, second end cover 1123, mounting groove 1125, side wall 1127, bottom wall 1129, motor shaft 13, gasket 14, bearing 15, stopper 16, first washer 17, second washer 18, elastic member 19;

[0048] Position detection device 20 , first sensing element 21 , second sensing element 23 , fixing assembly 25 , positioning shell 251 , circuit board component 253 . DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] 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.

[0052] See also Figure 1 and Figure 2 The motor 100 of the embodiment of the present application includes a motor body 10 and a position detection device 20. The motor body 10 includes a motor housing 11 and a motor shaft 13. The motor shaft 13 is installed on the motor housing 11 and can move relative to the motor housing 11. The motor housing 11 includes a barrel 111 and an end cover 112 installed at either end of the barrel 111. The position detection device 20 is installed at one end of the motor housing 11. The position detection device 20 includes a first sensing member 21 and a second sensing member 23. The first sensing member 21 directly or indirectly abuts against the end cover 112 at the end of the motor housing 11, so as to be installed on the motor shaft 13 by cooperating with the end cover 112. The first sensing member 21 can move with the motor shaft 13. The second sensing member 23 is arranged on the side of the first sensing member 21 opposite to the end cover 112. The second sensing member 23 is used to cooperate with the first sensing member 21 to sense the moving position of the motor shaft 13.

[0053] In some embodiments, the motor 100 includes but is not limited to a linear motor, a rotary motor, and a bidirectional motor. In the case where the motor 100 is a linear motor, the position detection device 20 senses the movement position of the motor shaft 13, that is, the position detection device 20 detects the telescopic position of the motor shaft 13, and controls the brush head assembly 400 ( Figure 5 When the motor 100 is a rotary motor, the position detection device 20 senses the movement position of the motor shaft 13, that is, the position detection device 20 detects the rotation angle of the motor shaft 13, and controls the sweeping angle of the brush head assembly 400 according to the rotation angle of the motor shaft 13.

[0054] The material of the motor housing 11 includes but is not limited to metal materials or non-metal materials, wherein metal materials include but are not limited to aluminum, iron, steel or aluminum alloy, and non-metal materials include but are not limited to plastic. In one example, the motor housing 11 can be made of a combination of metal materials and non-metal materials, thereby making the structural strength of the motor housing 11 higher, preventing damage to the motor housing 11 during the operation of the motor 100, and improving the stability and reliability of the motor 100. In another example, the motor housing 11 can be made of a non-metal material, thereby making the weight of the motor housing 11 lighter, thereby facilitating the realization of the motor 100 and the electric toothbrush 1000 ( Figure 5 Lightweight.

[0055] One of the first sensing element 21 and the second sensing element 23 may be an electromagnetic sensor (such as a Hall sensor, etc.), a photoelectric sensor (such as a laser sensor, etc.), or an ultrasonic sensor, etc., and the other of the first sensing element 21 and the second sensing element 23 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, etc., so that the first sensing element 21 and the second sensing element 23 can cooperate to jointly detect the moving position of the motor shaft 13. For example, when the second sensing element 23 is a Hall sensor, the first sensing element 21 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 13, that is, the Hall sensor can detect the moving position of the motor shaft 13 according to the magnetic field of the magnetic element.

[0056] In some embodiments, the first induction member 21 is directly or indirectly tightly fitted with the motor shaft 13 and can rotate with the motor shaft 13. Specifically, in some embodiments, the first induction member 21 is directly or indirectly tightly fitted with the motor shaft 13, that is, the fitting clearance between the first induction member 21 and the motor shaft 13 is small, or even no clearance, so that the stability of the connection between the first induction member 21 and the motor shaft 13 can be improved, and the first induction member 21 can be prevented from loosening or falling off from the motor shaft 13 during the operation of the motor 100. Therefore, on the one hand, the distance between the first induction member 21 and the second induction member 23 can be ensured to be stable, and the accuracy of the position detection device 20 detecting the motion position of the motor shaft 13 can be improved; on the other hand, the first induction member 21 can be prevented from falling off from the motor shaft 13 and affecting the operation of the motor 100, thereby ensuring the stability and reliability of the operation of the motor 100.

[0057] In other embodiments, the first sensing member 21 is directly or indirectly bonded to the motor shaft 13 and can rotate with the motor shaft 13, thereby improving the stability of the connection between the first sensing member 21 and the motor shaft 13 and preventing the first sensing member 21 from loosening or falling off from the motor shaft 13 during the operation of the motor 100. On the one hand, this can ensure the stability of the distance between the first sensing member 21 and the second sensing member 23, and improve the accuracy of the position detection device 20 detecting the motion position of the motor shaft 13; on the other hand, it can prevent the first sensing member 21 from falling off the motor shaft 13 and affecting the normal operation of the motor 100, thereby ensuring the stability and reliability of the operation of the motor 100. It should be noted that in some embodiments, the adhesive used when bonding the first sensing member 21 to the motor shaft 13 can be chloroprene adhesive, polyurethane adhesive or 502 adhesive, etc., which is not limited here.

[0058] In some further embodiments, the first sensing member 21 is directly or indirectly tightly fitted with the motor shaft 13, and directly or indirectly glued together, and the first sensing member 21 can rotate together with the motor shaft 13, thereby further improving the stability of the connection between the first sensing member 21 and the motor shaft 13, ensuring the stability of the distance between the first sensing member 21 and the second sensing member 23, and improving the accuracy of the position detection device 20 in detecting the motion position of the motor shaft 13.

[0059] In the motor 100 of the embodiment of the present application, the position detection device 20 includes a first sensing member 21 and a second sensing member 23. The first sensing member 21 directly or indirectly abuts against the end cover 112 at the end of the motor housing 11 so as to be installed on the motor shaft 13 by cooperating and positioning with the end cover 112. Therefore, compared with the electric toothbrush in the related art, the first sensing member 21 abuts and cooperates with the end cover 112 to achieve installation on the motor shaft 13, thereby preventing error accumulation due to multiple positioning between structural members, thereby reducing the positioning error of the first sensing member 21 in the axial direction X of the motor shaft 13, preventing large errors in the cooperation between the first sensing member 21 and the second sensing member 23, and thereby improving the reliability of the position detection device 20 in detecting the motion position of the motor shaft 13.

[0060] In addition, in the related art, since the positioning error between the structural parts is not controllable, the accumulation of positioning errors between multiple structural parts in the axial direction of the motor shaft will also lead to low assembly consistency of motors in different electric toothbrushes. For example, in the axial direction of the motor shaft, the distances between the detection parts and the sensing parts in different electric toothbrushes are different, which will make it difficult to uniformly adjust the motors in different electric toothbrushes, affecting the production efficiency and production quality of the electric toothbrushes. In the embodiment of the present application, the abutment and matching positioning of the first sensing part 21 and the end cover 112 can reduce the positioning error of the first sensing part 21 in the axial direction X of the motor shaft 13, prevent the accumulation of errors due to multiple positioning between the structural parts, thereby improving the assembly consistency of the motor 100 in different electric toothbrushes 1000, ensuring that the distances between the first sensing part 21 and the second sensing part 23 in different electric toothbrushes 1000 are roughly the same, facilitating unified adjustment, and thus improving the production efficiency and production quality of the electric toothbrush 1000.

[0061] The motor 100 is further described below with reference to the accompanying drawings.

[0062] See also Figure 1 and Figure 2 In some embodiments, the end cover 112 includes a first end cover 1121 and a second end cover 1123. Along the axial direction of the motor shaft 13, the barrel 111 includes a first end 1111 and a second end 1113 opposite to each other. The second end 1113 of the barrel 111 is closer to the load end of the motor 100 than the first end 1111 of the barrel 111. The first end cover 1121 is disposed at the first end 1111 of the barrel 111, and the second end cover 1123 is disposed at the second end 1113 of the barrel 111. The first induction member 21 is sleeved on the motor shaft 13 and is located outside the motor housing 11. The position detection device 20 is connected to the first end 1111 of the barrel 111. The first end cover 1121 is connected with the end 1111, and the first sensing element 21 is abutted against the first end cover 1121. Therefore, the first sensing element 21 can be directly positioned and installed on the axial direction X of the motor shaft 13 through the first end cover 1121. Compared with the traditional electric toothbrush, the first sensing element 21 is positioned and installed less times, thereby preventing the accumulation of errors caused by multiple positioning, that is, reducing the positioning error of the first sensing element 21 on the axial direction X of the motor shaft 13, preventing large errors in the coordination between the first sensing element 21 and the second sensing element 23, thereby improving the reliability of the position detection device 20 in detecting the motion position of the motor shaft 13.

[0063] It should be noted that please combine Figure 5In some embodiments, the load end of the motor 100 refers to the end of the motor 100 that bears the external load during operation. In the embodiment of the present application, the load end of the motor 100 may be the end of the motor shaft 13 connected to the external mechanism (such as the brush head assembly 400, etc.), wherein when the motor shaft 13 moves relative to the motor housing 11, the motor shaft 13 can drive the external mechanism connected thereto to move.

[0064] In other embodiments, the position detection device 20 is connected to the second end 1113 of the barrel 111, and the first sensing element 21 is in contact with the second end cover 1123. As a result, the first sensing element 21 can be directly positioned and installed on the axial direction X of the motor shaft 13 through the second end cover 1123. Compared with traditional electric toothbrushes, the first sensing element 21 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 21 on the axial direction X of the motor shaft 13, preventing large errors in the coordination between the first sensing element 21 and the second sensing element 23, and thereby improving the reliability of the position detection device 20 in detecting the motion position of the motor shaft 13.

[0065] Please combine Figure 3 In some embodiments, the motor body 10 further includes a gasket 14 , which is sleeved on the motor shaft 13 , and the first induction element 21 abuts against the end cover 112 through the gasket 14 .

[0066] Specifically, in some embodiments, when the position detection device 20 is connected to the first end 1111 of the barrel 111, the first sensing element 21 can abut against the first end cover 1121 through the gasket 14; when the position detection device 20 is connected to the second end 1113 of the barrel 111, the first sensing element 21 can abut against the second end cover 1123 through the gasket 14. The provision of the gasket 14 can reduce the friction between the first sensing element 21 and the end cover 112 when the first sensing element 21 moves relative to the motor housing 11 along with the motor shaft 13, thereby reducing the possibility of friction damage to the first sensing element 21 and improving the stability and reliability of the position detection device 20.

[0067] Since there are magnets and coils in the motor 100, if the first induction component 21 is a magnetic component, the magnetic field of the magnet or the magnetic field generated when the coil is energized may affect the magnetism of the first induction component 21, thereby affecting the accuracy of the position detection device 20 detecting the motion position of the motor shaft 13. In the embodiment of the present application, the first induction component 21 is a magnetic component, the second induction component 23 is a magnetic sensor, and the gasket 14 is made of a magnetic isolation material. Therefore, the gasket 14 can block the magnetic field, thereby preventing the magnetic field of the magnet in the motor 100 or the magnetic field generated when the coil is energized from affecting the magnetism of the first induction component 21, thereby ensuring the accuracy of the position detection device 20 detecting the motion position of the motor shaft 13. 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 14 is made of materials such as aluminum or copper.

[0068] In some embodiments, the first sensing member 21 is a magnetic member, the second sensing member 23 is a magnetic sensor, and at least a portion of the motor shaft 13 used to mount the first sensing member 21 is made of magnetic isolation material. This can prevent the magnetic field of the magnet in the motor 100 or the magnetic field generated when the coil is energized from being transmitted along the motor shaft 13 to the first sensing member 21, causing the magnetism of the first sensing member 21 to be affected, thereby improving the accuracy of the position detection device 20 in detecting the motion position of the motor shaft 13.

[0069] See also Figure 2 and Figure 3 In some embodiments, the first end cover 1121 and the barrel 111 are a split structure, the second end cover 1123 and the barrel 111 are an integrally formed structure, the position detection device 20 is arranged at the second end 1113 of the barrel 111, and the first sensing element 21 is in contact with the second end cover 1123. Therefore, compared with the second end cover 1123 needing to be installed and matched with the barrel 111, that is, compared with the second end cover 1123 and the barrel 111 being a split structure, the integrally formed structure can avoid positioning errors when the second end cover 1123 and the barrel 111 are installed, thereby further reducing the positioning error of the first sensing element 21 when it is positioned and installed by the second end cover 1123, thereby improving the stability and reliability of the cooperation between the first sensing element 21 and the second sensing element 23, and ensuring the detection accuracy of the position detection device 20.

[0070] In some embodiments, the first end cap 1121 and the barrel 111 may be connected together in a detachable manner, including but not limited to a snap connection or a threaded connection, etc. In other embodiments, the first end cap 1121 and the barrel 111 may be connected together in a non-detachable manner, including but not limited to bonding or welding, riveting, etc.

[0071] In other embodiments, the first end cap 1121 and the barrel 111 are an integrally formed structure, the second end cap 1123 and the barrel 111 are a split structure, the position detection device 20 is arranged at the first end 1111 of the barrel 111, and the first sensing element 21 abuts against the first end cap 1121. Therefore, compared with the first end cap 1121 needing to be installed and coordinated with the barrel 111, that is, compared with the first end cap 1121 and the barrel 111 being a split structure, the integrally formed structure can avoid positioning errors when the first end cap 1121 and the barrel 111 are installed, thereby further reducing the positioning error of the first sensing element 21 when it is positioned and installed through the first end cap 1121, thereby improving the stability and reliability of the coordination between the first sensing element 21 and the second sensing element 23, and ensuring the detection accuracy of the position detection device 20.

[0072] In some embodiments, the second end cap 1123 and the barrel 111 may be connected together in a detachable manner, including but not limited to a snap connection or a threaded connection, etc. In other embodiments, the second end cap 1123 and the barrel 111 may be connected together in a non-detachable manner, including but not limited to bonding, riveting or welding, etc.

[0073] It is understandable that, in the embodiment of the present application, the arrangement of the motor housing 11 may include: the first end cover 1121 and the barrel 111 are split structures, and the second end cover 1123 and the barrel 111 are split structures; or, the first end cover 1121 and the barrel 111 are an integrally formed structure, and the second end cover 1123 and the barrel 111 are an integrally formed structure; or, the first end cover 1121 and the barrel 111 are split structures, and the second end cover 1123 and the barrel 111 are an integrally formed structure; or, the first end cover 1121 and the barrel 111 are an integrally formed structure, and the second end cover 1123 and the barrel 111 are split structures. In any arrangement of the motor housing 11, the first induction element 21 may abut against one of the first end cover 1121 and the second end cover 1123.

[0074] See also Figures 1 to 3 In some embodiments, the position detection device 20 further includes a fixing component 25 , the fixing component 25 is rigidly connected to the motor housing 11 , and the second sensing element 23 is rigidly mounted on the fixing component 25 .

[0075] Specifically, in some embodiments, the fixing component 25 is rigidly connected to the motor housing 11, that is, the fixing component 25 and the motor housing 11 are relatively fixed; correspondingly, the second sensing member 23 is rigidly installed on the fixing component 25, that is, the second sensing member 23 and the fixing component 25 are relatively fixed. In addition, it can be seen from the above that the first sensing member 21 abuts against the end cover 112 so as to be installed on the motor shaft 13 by cooperating with the end cover 112. Thus, the first sensing member 21 and the second sensing member 23 are both positioned by the motor housing 11, so as to ensure the accuracy of the cooperation of the first sensing member 21 and the second sensing member 23 in the axial direction X of the motor shaft 13, thereby ensuring the stability and reliability of the cooperation between the first sensing member 21 and the second sensing member 23, and improving the detection accuracy of the position detection device 20.

[0076] In some embodiments, the fixing assembly 25 includes a positioning shell 251 and a circuit board component 253. The positioning shell 251 is rigidly connected to one end of the motor housing 11; the circuit board component 253 is rigidly installed on the end of the positioning shell 251 away from the motor housing 11, and the second sensor 23 is fixedly installed on the circuit board component 253.

[0077] Specifically, in some embodiments, when the second sensing member 23 cooperates with the first sensing member 21 to detect the movement position of the motor shaft 13, the circuit board component 253 can control the movement of the motor shaft 13 according to the detection result. For example, when the second sensing member 23 cooperates with the first sensing member 21 to detect the rotation angle of the motor shaft 13, the circuit board component 253 can control the rotation of the motor shaft 13 according to the detected rotation angle to achieve the brush head assembly 500 ( Figure 5 Control of the brushing angle).

[0078] In some embodiments, the positioning shell 251 and / or the motor shell 11 are made of metal material, and the positioning shell 251 is rigidly connected to the motor shell 11. It should be noted that in some embodiments, the metal material includes but is not limited to iron, stainless steel, aluminum or copper.

[0079] Among them, the positioning shell 251 and / or the motor shell 11 are made of metal materials, so that the structural strength of the positioning shell 251 and / or the motor shell 11 can be improved, the possibility of damage to the positioning shell 251 or the motor shell 11 can be reduced, the service life of the positioning shell 251 and the motor shell 11 can be extended, and the normal operation of the motor 100 can be ensured. In addition, the positioning shell 251 and the motor shell 11 are rigidly connected, thereby improving the stability of the connection between the positioning shell 251 and the motor shell 11, ensuring the accuracy of the cooperation between the second induction member 23 and the first induction member 21 in the axial direction X of the motor shaft 13, and thus improving the reliability of the position detection device 20 for detecting the motion position of the motor shaft 13.

[0080] In some embodiments, the positioning shell 251 is rigidly connected to the motor shell 11 through a first fastener; the first fastener locks the motor shell 11 and the positioning shell 251 along the radial direction of the motor shaft 13; and / or the first fastener locks the motor shell 11 and the positioning shell 251 along the axial direction X of the motor shaft 13. Among them, the provision of the first fastener can improve the connection strength between the positioning shell 251 and the motor shell 11, and improve the stability of the connection between the positioning shell 251 and the motor shell 11. It should be noted that, in some embodiments, the first fastener can be a bolt or a screw, etc.

[0081] Furthermore, in some embodiments, adhesive is provided between the first fastener and the motor housing 11. The provision of adhesive can further enhance the connection strength between the first fastener and the motor housing 11, prevent the first fastener and the motor housing 11 from loosening or falling off during the operation of the motor 100, thereby enhancing the stability of the connection between the positioning housing 251 and the motor housing 11.

[0082] In some embodiments, adhesive is provided between the first fastener and the positioning shell 251. The provision of adhesive can improve the connection strength between the first fastener and the positioning shell 251, prevent the first fastener and the positioning shell 251 from loosening or falling off during the operation of the motor 100, thereby improving the stability of the connection between the positioning shell 251 and the motor housing 11.

[0083] See also Figure 2 and Figure 3 In some embodiments, the motor body 10 further includes a bearing 15, and the bearing 15 includes a bearing outer ring and a bearing inner ring. The bearing outer ring is fixedly arranged on the end cover 112, and the bearing inner ring is sleeved and installed on the motor shaft 13. The bearing inner ring can rotate relative to the bearing outer ring together with the motor shaft 13. Among them, the setting of the bearing 15 can reduce the friction between the motor shaft 13 and the motor housing 11, and avoid the motor shaft 13 directly contacting the motor housing 11, resulting in excessive friction between the motor shaft 13 and the motor housing 11, 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 bearing 15 includes but is not limited to rolling bearings, sliding bearings, spherical bearings, and oil-containing bearings.

[0084] In some embodiments, the end cover 112 is provided with a mounting groove 1125 , which is recessed from a side of the end cover 112 opposite to the first sensing element 21 toward the first sensing element 21 , and the bearing 15 is disposed in the mounting groove 1125 .

[0085] Specifically, in certain embodiments, when the position detection device 20 is connected to the first end 1111 of the barrel 111, the mounting groove 1125 is recessed from the side of the first end cover 1121 opposite to the second end cover 1123 toward a direction away from the second end cover 1123, the bearing 15 is disposed in the mounting groove 1125, and the outer ring of the bearing is relatively fixed to the side wall 1127 of the mounting groove 1125; when the position detection device 20 is connected to the second end 1113 of the barrel 111, the mounting groove 1125 is recessed from the side of the second end cover 1123 opposite to the first end cover 1121 toward a direction away from the first end cover 1121, the bearing 15 is disposed in the mounting groove 1125, and the outer ring of the bearing is relatively fixed to the side wall 1127 of the mounting groove 1125. Among them, the setting of the installation groove 1125 can facilitate the positioning and installation of the bearing 15 on the one hand. For example, when the bearing 15 abuts against the bottom wall 1129 of the installation groove 1125, it can be determined that the bearing 15 is installed in place, thereby improving the assembly efficiency of the motor 100; on the other hand, it can avoid interference between the bearing 15 and other components in the motor housing 11, thereby ensuring the normal operation of the motor 100.

[0086] Please refer again Figure 2 and Figure 3 In some embodiments, the motor body 10 further includes a stopper 16, which is fixedly sleeved and connected to the motor shaft 13. The stopper 16 is located on the side of the bearing 15 away from the end cover 112 and is spaced from the bearing 15. Specifically, in some embodiments, when the motor shaft 13 moves relative to the motor housing 11, the stopper 16 can move relative to the motor housing 11 along with the motor shaft 13. For example, when the motor shaft 13 rotates relative to the motor housing 11, the stopper 16 can rotate relative to the motor housing 11 along with the motor shaft 13.

[0087] In some embodiments, the motor body 10 also includes an elastic member 19, which is sleeved on the motor shaft 13 and located in the motor housing 11. The opposite ends of the elastic member 19 are respectively abutted against the bearing 15 and the limit block 16. The elastic member 19 is used to apply an elastic force to the motor shaft 13 so that the first induction member 21 is abutted against the motor housing 11.

[0088] Specifically, in some embodiments, when the position detection device 20 is connected to the first end 1111 of the barrel 111, the elastic member 19 can apply an elastic force to the motor shaft 13 through the limit block 16, and the elastic force can move the motor shaft 13 in the direction from the first end cover 1121 to the second end cover 1123, so that the first sensing member 21 abuts against the first end cover 1121; when the position detection device 20 is connected to the second end 1113 of the barrel 111, the elastic member 19 can apply an elastic force to the motor shaft 13 through the limit block 16, and the elastic force can move the motor shaft 13 in the direction from the first end cover 1121 to the second end cover 1123, so that the first sensing member 21 abuts against the first end cover 1121; The shaft 13 moves in the direction from the second end cover 1123 to the first end cover 1121 so that the first sensing element 21 abuts against the second end cover 1123. Thus, the setting of the elastic element 19 can ensure that the first sensing element 21 is fixed in the axial direction X of the motor shaft 13 (parallel to the direction from the first end cover 1121 to the second end cover 1123; or the direction from the second end cover 1123 to the first end cover 1121), thereby ensuring that the position of the first sensing element 21 between the second sensing element 23 in the axial direction X of the motor shaft 13 is stable, thereby ensuring the reliability of the position detection device 20 in detecting the motion position of the motor shaft 13.

[0089] Furthermore, in some embodiments, the motor body 10 further includes a first washer 17 and a second washer 18. The first washer 17 is fixedly sleeved on the motor shaft 13 and is disposed on the side of the bearing 15 away from the end cover 112, and the first washer 17 is connected to the inner ring of the bearing; the second washer 18 is fixedly sleeved on the motor shaft 13 and is located between the first washer 17 and the stop block 16.

[0090] Specifically, in some embodiments, when the motor shaft 13 rotates relative to the motor housing 11, the first washer 17 and the second washer 18 can rotate relative to the motor housing 11 together with the motor shaft 13. The opposite ends of the elastic member 19 are respectively in contact with the first washer 17 and the second washer 18. When the position detection device 20 is connected to the first end 1111 of the barrel 111, the elastic member 19 can apply an elastic force to the motor shaft 13 through the second washer 18, so that the first induction member 21 is in contact with the first end cover 1121; when the position detection device 20 is connected to the second end 1113 of the barrel 111, the elastic member 19 can apply an elastic force to the motor shaft 13 through the second washer 18, so that the first induction member 21 is in contact with the second end cover 1123. The provision of the first washer 17 and the second washer 18 can reduce the friction between the elastic member 19 and the bearing 15 and the stop block 16, thereby reducing the possibility of damage to the elastic member 19, the bearing 15 and the stop block 16, and ensuring the normal operation of the motor 100.

[0091] It should be noted that, in some embodiments, the materials of the first gasket 17 and the second gasket 18 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.

[0092] In other embodiments, the motor body 10 further includes an elastic member 19, which is disposed in the motor housing 11, one end of the elastic member 19 is connected to the motor shaft 13, and the other end is matched with the motor housing 11, and the elastic member 19 is used to apply an elastic force to the motor shaft 13 so that the first induction member 21 abuts against the motor housing 11. It should be noted that, in some embodiments, the elastic member 19 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.

[0093] Exemplarily, the elastic member 19 may be a compression spring, which is always in a compressed state and applies an elastic force to the motor shaft 13 so that the first induction member 21 abuts against the motor housing 11 . Among them, when the position detection device 20 is connected to the first end 1111 of the barrel 111, one end of the elastic member 19 is connected to the motor shaft 13, and the other end is connected to the first end cover 1121, and the elastic member 19 is in a compressed state, thereby, the elastic member 19 can apply an elastic force to the motor shaft 13 that moves along the direction from the first end cover 1121 to the second end cover 1123, so that the first sensing member 21 abuts against the first end cover 1121; when the position detection device 20 is connected to the second end 1113 of the barrel 111, one end of the elastic member 19 is connected to the motor shaft 13, and the other end is connected to the second end cover 1123, and the elastic member 19 is in a compressed state, thereby, the elastic member 19 can apply an elastic force to the motor shaft 13 that moves along the direction from the second end cover 1123 to the first end cover 1121, so that the first sensing member 21 abuts against the second end cover 1123.

[0094] See also Figure 2 and Figure 5 The electric toothbrush 1000 of the embodiment of the present application includes a bracket assembly 200 and a motor 100 of any of the above embodiments, and the motor 100 is installed on the bracket assembly 200.

[0095] In the electric toothbrush 1000 of the embodiment of the present application, the position detection device 20 includes a first sensor 21 and a second sensor 23. The first sensor 21 directly or indirectly abuts against the end cover 112 at the end of the motor housing 11 so as to be installed on the motor shaft 13 by cooperating with the end cover 112. Therefore, compared with the electric toothbrush in the related art, the first sensor 21 can be directly cooperating with the end cover 112 to achieve installation on the motor shaft 13, thereby preventing error accumulation due to multiple positioning between structural parts, thereby reducing the positioning error of the first sensor 21 in the axial direction X of the motor shaft 13, and thereby improving the reliability of the position detection device 20 in detecting the motion position of the motor shaft 13.

[0096] See also Figure 2 and Figure 5 In some embodiments, the motor housing 11 forms a non-moving fit with the bracket assembly 200; and / or the fixing assembly 25 of the position detection device 20 forms a non-moving fit with the bracket assembly 200.

[0097] Specifically, in some embodiments, the motor housing 11 forms a non-moving fit with the bracket assembly 200, that is, the motor housing 11 is fixed relative to the bracket assembly 200 in the direction of rotation around the axis of the motor shaft 13, and / or the motor housing 11 is fixed relative to the bracket assembly 200 in the axial direction X of the motor shaft 13; accordingly, the fixing assembly 25 forms a non-moving fit with the bracket assembly 200, that is, the fixing assembly 25 is fixed relative to the bracket assembly 200 in the direction of rotation around the axis of the motor shaft 13, and / or the fixing assembly 25 is fixed relative to the bracket assembly 200 in the axial direction X of the motor shaft 13, thereby preventing the relative position between the motor housing 11 and the position detection device 20 from changing during the operation of the motor 100, thereby improving the reliability of the position detection device 20 detecting the motion position of the motor shaft 13, and ensuring the effectiveness of the position detection device 20 controlling the motion of the motor shaft 13.

[0098] Please combine Figure 6 and Figure 7 In some embodiments, the electric toothbrush 1000 also includes a limiting component 300, which includes a first limiting member 310 and a second limiting member 320. One of the first limiting member 310 and the second limiting member 320 is disposed on the motor 100, and the other is disposed on the bracket assembly 200. The first limiting member 310 and the second limiting member 320 cooperate to limit the relative rotation between the motor 100 and the bracket assembly 200.

[0099] Specifically, in some embodiments, one of the first limiting member 310 and the second limiting member 320 may be disposed on the motor body 10 and / or the position detection device 20, and the other may be disposed at a position of the bracket assembly 200 corresponding to the first limiting member 310 or the second limiting member 320 on the motor 100, whereby the first limiting member 310 and the second limiting member 320 can cooperate to jointly limit the relative rotation between the motor 100 and the bracket assembly 200.

[0100] Exemplarily, when the first limiting member 310 is disposed on the motor 100 and the second limiting member 320 is disposed on the bracket assembly 200, the first limiting member 310 may be a protrusion, that is, the protrusion is disposed on the motor body 10 and / or the position detection device 20, and accordingly, the second limiting member 320 may be a groove, and the protrusion and the groove cooperate to jointly limit the relative rotation between the motor 100 and the bracket assembly 200.

[0101] In some embodiments, the limiting assembly 300 includes at least two, and the first limiting members 310 of at least two limiting assemblies 300 are both disposed on the motor housing 11. Among them, the second limiting members 320 of at least two limiting assemblies 300 are both disposed at positions of the bracket assembly 200 corresponding to the first limiting members 310 on the motor housing 11, and the first limiting member 310 and the second limiting member 320 cooperate to limit the relative rotation between the motor housing 11 and the bracket assembly 200. It can be understood that the second limiting members 320 of at least two limiting assemblies 300 can also be disposed on the motor housing 11, and the first limiting members 310 of at least two limiting assemblies 300 can be disposed at positions of the bracket assembly 200 corresponding to the first limiting members 310 on the motor housing 11.

[0102] In other embodiments, the limiting assembly 300 includes at least two, and the first limiting members 310 of at least two limiting assemblies 300 are both disposed on the position detection device 20. Among them, the second limiting members 320 of at least two limiting assemblies 300 are both disposed at positions of the bracket assembly 200 corresponding to the first limiting members 310 on the position detection device 20, and the first limiting member 310 and the second limiting member 320 cooperate to limit the relative rotation between the position detection device 20 and the bracket assembly 200. It can be understood that the second limiting members 320 of at least two limiting assemblies 300 can also be disposed on the position detection device 20, and the first limiting members 310 of at least two limiting assemblies 300 can be disposed at positions of the bracket assembly 200 corresponding to the first limiting members 310 on the position detection device 20.

[0103] In some further embodiments, the limiting assembly 300 includes at least two, a portion of the first limiting members 310 of the at least two limiting assemblies 300 is disposed on the motor housing 11, and another portion of the first limiting members 310 is disposed on the position detection device 20. Among them, a portion of the second limiting members 320 of the at least two limiting assemblies 300 is disposed at a position of the bracket assembly 200 corresponding to the first limiting member 310 on the motor housing 11, and another portion of the second limiting members 320 is disposed at a position of the bracket assembly 200 corresponding to the first limiting member 310 on the position detection device 20, and the first limiting member 310 and the second limiting member 320 cooperate to limit the relative rotation between the motor 100 and the bracket assembly 200. It is understandable that a portion of the second limiting members 320 of the at least two limiting assemblies 300 can also be disposed on the motor housing 11, and another portion of the second limiting members 320 can be disposed on the position detection device 20. Among them, a part of the first limiting members 310 in at least two limiting assemblies 300 is arranged at a position of the bracket assembly 200 corresponding to the first limiting member 310 on the motor housing 11, and another part of the first limiting member 310 is arranged at a position of the bracket assembly 200 corresponding to the first limiting member 310 on the position detection device 20.

[0104] In some embodiments, in the axial direction X of the motor shaft 13, the motor 100 includes a first end 101 and a second end 103 relative to each other, one of the first limiting member 310 and the second limiting member 320 is arranged at the first end 101 of the motor 100 and / or the second end 103 of the motor 100, and the other is arranged at a position of the bracket assembly 200 corresponding to the first limiting member 310 or the second limiting member 320 on the motor 100, and the first limiting member 310 cooperates with the second limiting member 320 to form a non-rotating fit between the first end 101 of the motor 100 and the bracket assembly 200, and / or a non-rotating fit between the second end 103 of the motor 100 and the bracket assembly 200.

[0105] In one example, one of the first limiting member 310 and the second limiting member 320 is disposed at the first end 101 of the motor 100, and the other is disposed at a position of the bracket assembly 200 corresponding to the first limiting member 310 or the second limiting member 320 on the motor 100. In another example, one of the first limiting member 310 and the second limiting member 320 is disposed at the second end 103 of the motor 100, and the other is disposed at a position of the bracket assembly 200 corresponding to the first limiting member 310 or the second limiting member 320 on the motor 100. In another example, one of the first limiting member 310 and the second limiting member 320 is arranged at the first end 101 of the motor 100 and the second end 103 of the motor 100, and the other is arranged at a position of the bracket assembly 200 corresponding to the first limiting member 310 or the second limiting member 320 on the motor 100. As a result, the restraining force on the motor 100 is more uniform, which can further improve the stability of the installation of the motor 100 in the bracket assembly 200, prevent the relative position between the motor housing 11 and the position detection device 20 from changing during the operation of the motor 100, thereby improving the reliability of the position detection device 20 for detecting the motion position of the motor shaft 13, and ensuring the effectiveness of the position detection device 20 for controlling the motion of the motor shaft 13.

[0106] 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.

[0107] 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. A motor, characterized in that: include: A motor body, the motor body comprising a motor housing and a motor shaft, the motor shaft being mounted on the motor housing and being able to move relative to the motor housing, the motor housing comprising a barrel and an end cover mounted on either end of the barrel; and A position detection device, the position detection device is installed at one end of the motor housing, the position detection device includes a first sensing member and a second sensing member, the first sensing member directly or indirectly abuts against the end cover of the one end of the motor housing, so as to be installed on the motor shaft by cooperating with the end cover, the first sensing member can move with the motor shaft, the second sensing member is arranged on the side of the first sensing member opposite to the end cover, and the second sensing member is used to cooperate with the first sensing member to sense the moving position of the motor shaft.

2. The motor according to claim 1, characterized in that The end cover includes a first end cover and a second end cover. Along the axial direction of the motor shaft, the barrel portion includes a first end and a second end opposite to each other. The second end of the barrel portion is closer to the load end of the motor than the first end of the barrel portion. The first end cover is arranged at the first end of the barrel portion, and the second end cover is arranged at the second end of the barrel portion. The first induction member is sleeved on the motor shaft and is located outside the motor housing. The position detection device is disposed at the first end of the barrel, and the first sensing element is in contact with the first end cover; or The position detection device is arranged at the second end of the barrel, and the first sensing element is in contact with the second end cover.

3. The motor according to claim 2, 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.

4. The motor according to claim 3, characterized in that The first induction element is a magnetic element, and the second induction element is a magnetic sensor; 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.

5. The motor according to claim 2, characterized in that: The first end cover and the barrel are separate structures, the second end cover and the barrel are integrally formed structures, the position detection device is arranged at the second end of the barrel, and the first sensing element is in contact with the second end cover; or The first end cover and the barrel are an integrally formed structure, the second end cover and the barrel are a separate structure, the position detection device is arranged at the first end of the barrel, and the first sensing element abuts against the first end cover.

6. The motor according to claim 1, characterized in that The position detection device further comprises a fixing component, wherein the fixing component is rigidly connected to the motor housing, and the second induction component is rigidly mounted on the fixing component.

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

8. The motor according to claim 7, characterized in that The positioning shell and / or the motor shell are made of metal material, and the positioning shell is rigidly connected to the motor shell.

9. The motor according to claim 8, characterized in that The positioning housing is rigidly connected to the motor housing via a first fastener; The first fastener locks the motor housing and the positioning housing along the radial direction of the motor shaft; and / or The first fastener locks the motor housing and the positioning housing 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 positioning shell.

10. The motor 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 end cover, 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.

11. The motor according to claim 10, characterized in that The end cover is provided with a mounting groove, the mounting groove is recessed from a side of the end cover opposite to the first sensing component toward the first sensing component, and the bearing is arranged in the mounting groove.

12. The motor according to claim 10, characterized in that The motor body also includes: A limit block is fixedly sleeved and connected to the motor shaft. The limit block is located on a side of the bearing away from the end cover and is spaced from the bearing.

13. The motor according to claim 12, characterized in that The motor body also includes: a first washer, the first washer being fixedly sleeved on the motor shaft and disposed on a side of the bearing away from the end cover, the first washer being connected to an inner ring of the bearing; and The second washer is fixedly sleeved on the motor shaft and is located between the first washer and the limiting block.

14. The motor according to claim 12, characterized in that The motor body also includes: An elastic member, wherein the elastic member is sleeved on the motor shaft and is located in the motor housing, wherein opposite ends of the elastic member are respectively abutted against the bearing and the limit block, 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.

15. The motor according to claim 1, characterized in that The motor body also includes: An elastic member is arranged in the motor housing, one end of the elastic member is connected to the motor shaft, and the other end is matched with 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.

16. The motor according to claim 1, 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.

17. An electric toothbrush, characterized in that: include: Bracket assembly; and The motor described in any one of claims 1 to 16 is mounted on the bracket assembly.

18. The electric toothbrush according to claim 17, characterized in that The motor housing forms a non-moving fit with the bracket assembly; and / or The fixing assembly of the position detection device forms a non-moving fit with the bracket assembly.

19. The electric toothbrush according to claim 18, 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.

20. The electric toothbrush according to claim 19, 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.

21. The electric toothbrush according to claim 19, 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.

Images