Motor module and electric toothbrush

Abstract

The utility model relates to the technical field of oral cavity cleaning, and discloses a motor module and an electric toothbrush, the motor module comprises a servo motor, an induction magnet and a Hall element, the servo motor comprises a stator and a rotor, one of the stator and the rotor is provided with a permanent magnet, the other one is provided with a coil winding, the coil winding is provided with a wire outlet end, and the Hall element is arranged on the induction magnet. The induction magnet is fixed to the rotor to rotate along with the rotor, the Hall element and the wire outlet end are located at the two opposite ends of the stator in the first direction respectively, the first direction is the extending direction of the rotating axis of the rotor, and the Hall element is used for detecting the magnetic field of the induction magnet so as to detect the current position of the rotor. According to the motor module and the electric toothbrush provided by the utility model, the Hall element and the leading-out terminal of the servo motor are respectively positioned at the two ends of the stator, so that the influence of electromagnetic interference of the leading-out terminal on the detection of the Hall element can be avoided, the detection precision of the Hall element is higher, and the current position of the rotor of the servo motor can be accurately detected.

Description

Technical Field

[0001] The utility model relates to the technical field of oral cleaning, in particular to a motor module and an electric toothbrush. Background Art

[0002] As people's awareness of hygiene increases, more and more people choose electric toothbrushes to clean their mouths. Electric toothbrushes use motors to drive the brush heads to vibrate at high frequencies, and use the vibrating brush heads to directly act on teeth, gaps between teeth, etc. to achieve the purpose of cleaning the mouth.

[0003] In the related art, in order to detect the motor, the Hall element is usually used to detect the induction magnet of the motor to determine the current position of the motor's rotor. However, the output line of the motor generates a magnetic field when it is turned on. The magnetic field generated by the output line will affect the Hall element's detection of the magnetic field of the induction magnet. The Hall element has low detection accuracy and cannot accurately detect the current position of the motor's rotor. Utility Model Content

[0004] The embodiment of the utility model discloses a motor module and an electric toothbrush. By locating the output terminals of the Hall element and the servo motor at the two ends of the stator respectively, the electromagnetic interference of the output terminals can be avoided from affecting the detection of the Hall element. The detection accuracy of the Hall element is high, and the current position of the rotor of the servo motor can be accurately detected.

[0005] In the first aspect, an embodiment of the utility model discloses a motor module, including a servo motor, an induction magnet and a Hall element, the servo motor including a stator and a rotor, one of the stator and the rotor is provided with a permanent magnet, and the other is provided with a coil winding, the coil winding has an output terminal, the induction magnet is fixed to the rotor to rotate with the rotor, the Hall element and the output terminal are respectively located at two opposite ends of the stator along a first direction, the first direction is the extension direction of the rotation axis of the rotor, and the Hall element is used to detect the magnetic field of the induction magnet to detect the current position of the rotor.

[0006] As an optional implementation, in an embodiment of the utility model, the stator has a first end and a second end arranged relatively to each other in the first direction, and the servo motor also includes a rotating shaft, one end of the rotating shaft is fixed to the rotor to rotate with the rotor, and the other end of the rotating shaft extends and protrudes from the first end, and one of the output terminal and the Hall element is located at the first end, and the other is located at the second end.

[0007] As an optional implementation, in an embodiment of the utility model, the induction magnet and the Hall element are located at the same end of the stator.

[0008] As an optional implementation, in an embodiment of the utility model, the main board has a first power connection portion and a second power connection portion, the first power connection portion and the second power connection portion are spaced apart along the extension direction of the main board, the first power connection portion is located at a position of the main board close to an end of the stator provided with the outlet terminal, and the first power connection portion is electrically connected to the outlet terminal, the second power connection portion is located at a position of the main board close to an end of the stator provided with the Hall element, and the second power connection portion is electrically connected to the Hall element.

[0009] As an optional implementation, in an embodiment of the utility model, the main board is arranged on a side of the bracket away from the stator, the bracket is provided with a first wire passing hole, and the outlet terminal is passed through the first wire passing hole to be electrically connected to the main board.

[0010] As an optional implementation, in an embodiment of the utility model, the main board is arranged on a side of the bracket facing away from the stator, the motor module also includes a flexible circuit board, the flexible circuit board includes a main body and a lead-out part, the main body is arranged at one end of the stator, the Hall element is arranged on the main body, the lead-out part is arranged on the main body, the lead-out part extends from a side of the bracket toward the stator, around the circumference of the bracket to a side of the bracket facing away from the stator, and is electrically connected to the main board.

[0011] As an optional implementation, in an embodiment of the utility model, the bracket includes a first part and a second part, the first part and the second part are covered and connected to form a accommodating cavity, and the stator, the Hall element and the induction magnet are located in the accommodating cavity.

[0012] As an optional implementation, in an embodiment of the utility model, a first positioning portion is provided on the circumferential side of the stator, and a second positioning portion is provided on the bracket, and the second positioning portion is used to cooperate with the first positioning portion to position the stator and the bracket.

[0013] As an optional implementation, in an embodiment of the utility model, the motor module also includes a mounting base and a flexible circuit board, the mounting base is fixedly connected to one end of the stator, the flexible circuit board is arranged on a side of the mounting base away from the stator, and the Hall element is arranged on the flexible circuit board.

[0014] As an optional implementation, in an embodiment of the utility model, the servo motor also includes a rotating shaft, one end of the rotating shaft is fixed to the rotor to rotate with the rotor, the other end of the rotating shaft extends and protrudes from one end of the stator where the mounting seat is provided, and the rotating shaft passes through the mounting seat, the induction magnet is sleeved on the part of the rotating shaft located in the mounting seat, or the other end of the rotating shaft protrudes from one end of the stator away from the mounting seat.

[0015] As an optional implementation, in an embodiment of the utility model, the motor module also includes a reinforcement member, which is arranged on the side of the flexible circuit board away from the mounting base, and the reinforcement member is at least partially arranged corresponding to the Hall element, and the reinforcement member is used to increase the strength of the flexible circuit board.

[0016] As an optional implementation, in an embodiment of the utility model, the motor module also includes a bracket and a main board, the stator is arranged on the bracket, the main board is arranged on the bracket, the main board extends from one end of the stator to the other end to be electrically connected to the output terminal and the Hall element, a third positioning portion is provided on the peripheral side of the mounting seat, and the bracket is provided with a fourth positioning portion, and the fourth positioning portion is used to cooperate with the third positioning portion to position the mounting seat and the bracket.

[0017] As an optional embodiment, in an embodiment of the utility model, the servo motor also includes a rotating shaft, one end of the rotating shaft is fixed to the rotor to rotate with the rotor, one end of the stator is provided with a bearing hole and a second wire hole, the bearing hole is located on the end surface of one end of the stator, the bearing hole is provided with a bearing, the other end of the rotating shaft is connected to the bearing, and the second wire hole is located on the circumferential side of one end of the stator.

[0018] As an optional implementation, in an embodiment of the utility model, the servo motor also includes a rotating shaft, one end of the rotating shaft is fixed to the rotor to rotate with the rotor, the other end of the rotating shaft extends and protrudes from the stator, and the end of the rotating shaft protruding from the stator has a flat portion, the flat portion is used to install a brush head of an electric toothbrush, and the bristles of the brush head are oriented in the same direction as the first plane of the flat portion, and when the servo motor is in a reset state, the first plane is arranged parallel to the plane where the main board is located.

[0019] In a second aspect, an embodiment of the utility model discloses an electric toothbrush, comprising a handle, a brush head and the motor module of the first aspect, wherein the brush head is connected to the rotating shaft of the servo motor, and the motor module is arranged on the handle.

[0020] As an optional implementation, in the embodiment of the utility model, the motor module further comprises a housing, the housing is arranged on the handle, the stator is mounted on the housing, one end of the housing is sleeved with a sealing ring, and the sealing ring is abutted against the handle on the peripheral side away from the housing.

[0021] Compared with the prior art, the embodiments of the present invention have at least the following beneficial effects:

[0022] In the embodiment of the utility model, one of the permanent magnet and the coil winding is arranged on the stator of the servo motor, and the other is arranged on the rotor of the servo motor. The outlet end of the coil winding is used to electrically connect with the electric toothbrush. When the coil winding is energized, the rotor can rotate relative to the stator. Based on this, when the motor module is applied to the electric toothbrush, the servo motor can drive the brush head of the electric toothbrush to vibrate. At the same time, by locating the outlet ends of the Hall element and the servo motor at the two ends of the stator along the first direction respectively, the Hall element can detect the magnetic field of the induction magnet that rotates with the rotor, thereby detecting the current position of the rotor, and can avoid the influence of electromagnetic interference of the outlet end on the detection of the Hall element. The detection accuracy of the Hall element is high, and the current position of the rotor of the motor can be accurately detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this technical field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the structure of a motor module (with bracket omitted) disclosed in an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the decomposition mechanism of a motor module (with the bracket omitted) disclosed in an embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of the exploded structure of a motor module disclosed in an embodiment of the utility model;

[0027] Figure 4 It is a schematic diagram of the exploded structure of the bracket disclosed in the embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the exploded structure of the servo motor disclosed in the embodiment of the utility model;

[0029] Figure 6 It is a structural schematic diagram of an electric toothbrush disclosed in an embodiment of the utility model;

[0030] Figure 7 The utility model is a schematic diagram of the exploded structure of an electric toothbrush disclosed in an embodiment of the utility model.

[0031] Description of main reference numerals

[0032] 100, motor module; 10, servo motor; 11, stator; 11a, first end; 11b, second end; 11c, first positioning part; 11d, bearing hole; 11e, second wire hole; 12, rotor; 13, permanent magnet; 14, wire end; 15, shaft; 151, flat part; 151a, first plane; 16, bearing; 20, induction magnet; 30, Hall element; 40, bracket; 40a, first wire hole; 40b, second positioning part; 40c, fourth positioning part; 41, first part; 42, second part; 50, main board; 60, flexible circuit board; 61, main body; 62, lead-out part; 70, mounting seat; 70a, third positioning part; 80, reinforcement; 200, electric toothbrush; 201, handle; 202, brush head; 203, shell; 204, sealing ring; x, first direction. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0035] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0036] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0038] The utility model discloses a motor module and an electric toothbrush. By locating the output terminals of a Hall element and a servo motor at two ends of a stator respectively, the influence of electromagnetic interference of the output terminals on the detection of the Hall element can be avoided. The detection accuracy of the Hall element is high, and the current position of the rotor of the servo motor can be accurately detected.

[0039] Please also read Figure 1 and Figure 2 , is a structural schematic diagram of a motor module 100 provided by an embodiment of the utility model, the motor module 100 includes a servo motor 10, an induction magnet 20 and a Hall element 30, the servo motor 10 includes a stator 11 and a rotor 12, one of the stator 11 and the rotor 12 is provided with a permanent magnet 13, and the other is provided with a coil winding (not shown), the coil winding has an output terminal 14, the induction magnet 20 is fixed to the rotor 12 to rotate with the rotor 12, the Hall element 30 and the output terminal 14 are respectively located at two opposite ends of the stator 11 along a first direction x, the first direction x is the extension direction of the rotation axis of the rotor 12, and the Hall element 30 is used to detect the magnetic field of the induction magnet 20 to detect the current position of the rotor 12.

[0040] in, Figure 1 The Hall element 30 in FIG. 1 is shown by a dotted line, which only indicates that the Hall element 30 is located at one end of the stator. In fact, the Hall element 30 of this embodiment is blocked by other components of the motor module 100 .

[0041] In this embodiment, one of the permanent magnet 13 and the coil winding is arranged on the stator 11 of the servo motor 10, and the other is arranged on the rotor 12 of the servo motor 10. The outlet terminal 14 of the coil winding is used to be electrically connected to the electric toothbrush. When the coil winding is energized, the rotor 12 can rotate relative to the stator 11. Based on this, when the motor module 100 is applied to the electric toothbrush, the servo motor 10 can drive the brush head of the electric toothbrush to vibrate. At the same time, by locating the Hall element 30 and the outlet terminal 14 of the servo motor 10 at the two ends of the stator 11 along the first direction x, the Hall element 30 can detect the magnetic field of the induction magnet 20 that rotates with the rotor 12, thereby detecting the current position of the rotor 12, and can avoid the electromagnetic interference generated by the outlet terminal 14 from affecting the detection of the Hall element 30. The detection accuracy of the Hall element 30 is high, and the current position of the rotor 12 of the servo motor 10 can be accurately detected.

[0042] Exemplarily, the sensing magnet 20 and the Hall element 30 are located at the same end of the stator 11. In this way, by locating the sensing magnet and the Hall element 30 at the same end of the stator 11, the distance between the Hall element 30 and the sensing magnet 20 is small, and the Hall element 30 can better detect the magnetic field of the sensing magnet 20, thereby improving the detection accuracy of the Hall element 30.

[0043] In some other embodiments, the induction magnet 20 and the Hall element 30 may be located at different ends of the stator 11 , or the induction magnet 20 may be located in the middle of the stator 11 , which is not specifically limited in this embodiment.

[0044] Alternatively, if Figure 2As shown, the stator 11 has a first end 11a and a second end 11b which are arranged opposite to each other in a first direction x, and the servo motor 10 further includes a rotating shaft 15, one end of which is fixed to the rotor 12 so as to rotate with the rotor 12, and the other end of the rotating shaft 15 extends and protrudes from the first end 11a, and one of the outlet terminal 14 and the Hall element 30 is located at the first end 11a, and the other is located at the second end 11b. In this way, on the one hand, by fixing one end of the rotating shaft 15 to the rotor 12 so as to rotate with the rotor 12, and the other end of the rotating shaft 15 extends and protrudes from the first end 11a, the other end of the rotating shaft 15 can be used to connect with the brush head of the electric toothbrush, thereby driving the brush head of the electric toothbrush to vibrate. On the other hand, by locating one of the outlet terminal 14 and the Hall element 30 at the first end 11a and the other at the second end 11b, and utilizing the characteristic that the stator 11 has a larger size along the first direction x (the axial size of the stator 11 is usually larger than the radial size), the distance between the outlet terminal 14 and the Hall element 30 is made larger, so as to avoid the electromagnetic interference generated by the outlet terminal 14 affecting the detection of the Hall element 30. The detection accuracy of the Hall element 30 is high, and the current position of the rotor 12 of the motor can be accurately detected. In addition, while setting a larger distance between the outlet terminal 14 and the Hall element 30, the distance does not exceed the size of the stator 11 along the first direction x, so that the overall structure of the servo motor 10 can be kept compact, and the overall size of the motor module 100 can be avoided from being increased, which is conducive to the miniaturization design of the motor module 100. The motor module 100 can be applied to electric toothbrushes with smaller volumes.

[0045] That is, this embodiment provides two different positions. One is that the end of the outlet terminal 14 and the rotating shaft 15 protruding from the stator 11 is located at the first end 11a, and the Hall element 30 is located at the second end 11b. The other is that the end of the Hall element 30 and the rotating shaft 15 protruding from the stator 11 is located at the first end 11a, and the outlet terminal 14 is located at the second end 11b. The selection can be made according to actual conditions, and this embodiment does not make specific restrictions on this. Figure 2 , this embodiment takes the first method as an example.

[0046] In some embodiments, Figure 3 As shown, the motor module 100 also includes a bracket 40 and a main board 50, the stator 11 is arranged on the bracket 40, the main board 50 is arranged on the bracket 40, and the main board 50 extends from one end of the stator 11 to the other end to be electrically connected with the outlet terminal 14 and the Hall element 30. In this way, the stator 11 and the main board 50 are arranged by the bracket 40, so that the stator 11 and the main board 50 are assembled as one, and the overall structure of the motor module 100 is relatively compact and reliable, and the assembly difficulty is relatively low. In addition, the main board 50 extends from one end of the stator 11 to the other end, and the two ends of the main board 50 are respectively close to the outlet terminal 14 and the Hall element 30, which facilitates the electrical connection between the outlet terminal 14 and the Hall element 30 and the main board 50, and the wiring difficulty is relatively low, and the circuit is relatively simple.

[0047] Exemplarily, the main board 50 has a first power connection portion (not shown) and a second power connection portion (not shown), the first power connection portion and the second power connection portion are arranged at intervals along the extension direction of the main board 50, the first power connection portion is located at a position of the main board 50 close to the end of the stator 11 provided with the outlet terminal 14, and the first power connection portion is electrically connected to the outlet terminal 14, the second power connection portion is located at a position of the main board 50 close to the end of the stator 11 provided with the Hall element 30, and the second power connection portion is electrically connected to the Hall element 30. In this way, by the first power connection portion being located at a position of the main board 50 close to the end of the stator 11 provided with the outlet terminal, the distance between the outlet terminal 14 and the first power connection portion is small, which is convenient for the connection between the two, and the second power connection portion is located at a position of the main board 50 close to the end of the stator 11 provided with the Hall element 30, the distance between the Hall element 30 and the second power connection portion is small, which is convenient for the connection between the two, and the routing of the outlet terminal 14 and the Hall element 30 and the main board 50 can be shortened.

[0048] Optionally, the main board 50 is arranged on the side of the bracket 40 away from the stator 11, the bracket 40 is provided with a first wire hole 40a, and the outlet terminal 14 is passed through the first wire hole 40a to be electrically connected to the main board 50. In this way, on the one hand, by setting the main board 50 and the stator 11 on the bracket 40, and using the bracket 40 to separate the main board 50 and the stator 11 on both sides, the overall structure of the motor module 100 is relatively compact, and when the motor module 100 is applied to an electric toothbrush, the main board 50 located on the side of the bracket 40 away from the stator 11 is close to the handle housing of the electric toothbrush, which is convenient for setting a button on the main board 50 to connect with the button cap set on the housing, or to connect with the display screen / touch screen set on the housing, and the wiring difficulty is relatively low. On the other hand, by providing a first wire passing hole 40a on the bracket 40, the wire terminal 14 can directly pass through the first wire passing hole 40a from the side of the bracket 40 facing the stator 11 and extend to the side of the bracket 40 away from the stator 11, so as to facilitate electrical connection with the main board 50 located on the side of the bracket 40 away from the stator 11. The wire terminal 14 does not need to be detoured, which shortens the routing of the wire terminal 14 and reduces the risk of damage to the wire terminal 14.

[0049] In some embodiments, Figure 2 and Figure 3As shown, the motor module 100 further includes a flexible circuit board 60, and the flexible circuit board 60 includes a main body 61 and a lead-out portion 62. The main body 61 is arranged at one end of the stator 11, the Hall element 30 is arranged at the main body 61, and the lead-out portion 62 is arranged at the main body 61. The lead-out portion 62 extends from the side of the bracket 40 toward the stator 11 around the circumference of the bracket 40 to the side of the bracket 40 away from the stator 11, and is electrically connected to the main board 50. In this way, on the one hand, the main body 61 of the flexible circuit board 60 is arranged at one end of the stator 11, and the Hall element 30 is arranged at the main body 61, so that the Hall element 30 is electrically connected to the flexible circuit board 60, and the Hall element 30 is located at one end of the stator 11, and is electrically connected to the main board 50 by using the lead-out portion 62, so that the electrical conduction between the Hall element 30 and the main board 50 is realized. On the other hand, the lead-out portion 62 can utilize the flexible and bendable characteristics of the flexible circuit board 60 to extend from the side of the bracket 40 toward the stator 11 around the direct circumferential side to the side of the bracket 40 away from the stator 11, thereby connecting the lead-out portion 62 to the main board 50, and the routing length of the lead-out portion 62 is relatively short.

[0050] For example, Figure 4 As shown, the bracket 40 includes a first part 41 and a second part 42, and the first part 41 and the second part 42 are covered and connected to form a receiving cavity, and the stator 11, the Hall element 30 and the induction magnet 20 are located in the receiving cavity. In this way, on the one hand, by covering and connecting the first part 41 and the second part 42, a receiving cavity can be formed between the first part 41 and the second part 42, and the receiving cavity is used to receive components such as the stator 11, the Hall element 30 and the induction magnet 20, and the first part 41 and the second part 42 can protect the components in the receiving cavity. On the other hand, by covering or disassembling the first part 41 and the second part 42, the assembly and disassembly of the stator 11, the Hall element 30 and the induction magnet 20 can be realized, and the assembly difficulty is low, which is convenient for repairing and replacing the components in the receiving cavity.

[0051] Alternatively, if Figure 2 and Figure 4 As shown, the circumferential side of the stator 11 is provided with a first positioning portion 11c, and the bracket 40 is provided with a second positioning portion 40b, and the second positioning portion 40b is used to cooperate with the first positioning portion 11c to position the stator 11 and the bracket 40. In this way, during assembly, the first positioning portion 11c and the second positioning portion 40b can be used to cooperate and connect to pre-position the stator 11 and the bracket 40, thereby improving the assembly accuracy of the stator 11 and the bracket 40 and reducing the assembly difficulty. Moreover, after the assembly is completed, the stator 11 and the bracket 40 can be positioned by cooperating with the first positioning portion 11c and the second positioning portion 40b, thereby preventing the stator 11 from shaking or even deviating from the position relative to the bracket 40, thereby improving the reliability of the assembly of the stator 11 and the bracket 40.

[0052] Exemplarily, one of the first positioning portion 11c and the second positioning portion 40b is a groove, and the other is a protrusion.

[0053] In some embodiments, refer again to Figure 1 and Figure 2 The motor module 100 further includes a mounting seat 70, the mounting seat 70 is fixedly connected to one end of the stator 11, the flexible circuit board 60 is arranged on the side of the mounting seat 70 away from the stator 11, and the Hall element 30 is arranged on the flexible circuit board 60. In this way, by arranging the mounting seat 70 at one end of the stator 11 and using the mounting seat 70 to arrange the flexible circuit board 60, the servo motor 10 and the flexible circuit board 60 are connected to form an integral structure, thereby realizing the assembly of the motor module 100.

[0054] According to the record of this embodiment, optionally, this embodiment provides two different position modes, one is that the output terminal 14 and the end of the rotating shaft 15 protruding from the stator 11 are located at the first end 11a, and the Hall element 30 is located at the second end 11b; the other is that the Hall element 30 and the end of the rotating shaft 15 protruding from the stator 11 are located at the first end 11a, and the output terminal 14 is located at the second end 11b.

[0055] Taking the second method as an example, one end of the rotating shaft 15 is fixed to the rotor 12 to rotate with the rotor 12, and the other end of the rotating shaft 15 extends and protrudes from one end (first end 11a) of the stator 11 provided with a mounting seat 70, then the rotating shaft 15 passes through the mounting seat 70, and the induction magnet 20 is sleeved on the portion of the rotating shaft 15 located in the mounting seat 70. In this way, the Hall element 30 is arranged on the flexible circuit board 60 on the mounting seat 70, and can detect the induction magnet 20 in the mounting seat 70 at a relatively close distance, thereby improving the detection accuracy. In addition, the rotating shaft 15 passes through the mounting seat 70, which facilitates the connection between the rotating shaft 15 and the brush head of the electric toothbrush, driving the brush head to vibrate.

[0056] In some embodiments, Figure 1 and Figure 2 As shown, the motor module 100 further includes a reinforcing member 80, which is disposed on the side of the flexible circuit board 60 away from the mounting seat 70, and the reinforcing member 80 is at least partially disposed corresponding to the Hall element 30, and the reinforcing member 80 is used to improve the strength of the flexible circuit board 60. In this way, by disposing the reinforcing member 80 on the side of the flexible circuit board 60 away from the mounting seat 70, and at least partially disposed corresponding to the Hall element 30, the strength of the flexible circuit board 60 is improved by using the reinforcing member 80, especially the strength of the part of the flexible circuit board 60 where the Hall element 30 is disposed, so that the relative position of the Hall element 30 and the induction magnet 20 can be prevented from being offset due to the deformation of the flexible circuit board 60, the Hall element 30 and the induction magnet 20 can be kept parallel, and the detection accuracy of the Hall element 30 is high.

[0057] Alternatively, if Figure 2 and Figure 4 As shown, the third positioning portion 70a is provided on the peripheral side of the mounting seat 70, and the bracket 40 is provided with a fourth positioning portion 40c, and the fourth positioning portion 40c is used to cooperate with the third positioning portion 70a to position the mounting seat 70 and the bracket 40. In this way, during assembly, the third positioning portion 70a and the fourth positioning portion 40c can be used to cooperate and connect to pre-position the mounting seat 70 and the bracket 40, thereby improving the assembly accuracy of the mounting seat 70 and the bracket 40 and reducing the assembly difficulty. Moreover, after the assembly is completed, the mounting seat 70 and the bracket 40 can be positioned by the third positioning portion 70a and the fourth positioning portion 40c, preventing the mounting seat 70 from shaking or even deviating from the bracket 40 relative to the bracket 40, thereby improving the reliability of the assembly of the mounting seat 70 and the bracket 40.

[0058] Exemplarily, one of the third positioning portion 70a and the fourth positioning portion 40c is a groove, and the other is a protrusion.

[0059] Alternatively, if Figure 5 As shown, a bearing hole 11d and a second wire-passing hole 11e are provided at one end of the stator 11, the bearing hole 11d is located at the end surface of one end of the stator 11, the bearing hole 11d is provided with a bearing 16, the other end of the rotating shaft 15 is connected to the bearing 16, and the second wire-passing hole 11e is located at the peripheral side of one end of the stator 11. In this way, by locating the second wire-passing hole 11e and the bearing hole 11d at the end surface and the peripheral side of one end of the stator 11, respectively, interference between the outlet terminal 14 and the rotating shaft 15 can be avoided.

[0060] In some embodiments, the end of the rotating shaft 15 protruding from the stator 11 has a flat portion 151, and the flat portion 151 is used to install the brush head of the electric toothbrush, and the bristles of the brush head are oriented in the same direction as the first plane 151a of the flat portion 151. When the servo motor 10 is in the reset state, the first plane 151a is arranged parallel to the plane where the main board 50 is located. In this way, by providing the flat portion 151 at the end of the rotating shaft 15 protruding from the stator 11, the flat portion 151 is connected to the brush head to improve the connection strength between the rotating shaft 15 and the brush head, and ensure the reliability of the rotating shaft 15 driving the brush head to vibrate. In addition, when the servo motor 10 is in the reset state, the first plane 151a of the flat portion 151 is parallel to the plane where the main board 50 is located. When the user uses the electric toothbrush to clean the oral cavity, the plane where the main board 50 is located is roughly parallel to the teeth, and the bristles of the brush head can face the user's teeth, which is convenient for the user to clean the teeth.

[0061] The embodiment of the utility model provides a motor module 100, wherein one of the permanent magnet 13 and the coil winding is arranged on the stator 11 of the servo motor 10, and the other is arranged on the rotor 12 of the servo motor 10, and the outlet terminal 14 of the coil winding is used to be electrically connected to the electric toothbrush, and the coil winding is energized to make the rotor 12 rotate relative to the stator 11. Based on this, when the motor module 100 is applied to the electric toothbrush, the servo motor 10 can drive the brush head of the electric toothbrush to vibrate. At the same time, by locating the Hall element 30 and the outlet terminal 14 of the servo motor 10 at the two ends of the stator 11 along the first direction x, respectively, the Hall element 30 can detect the magnetic field of the induction magnet 20 rotating with the rotor 12, thereby detecting the current position of the rotor 12, and can avoid the electromagnetic interference generated by the outlet terminal 14 from affecting the detection of the Hall element 30, and the detection accuracy of the Hall element 30 is high, and the current position of the rotor 12 of the servo motor 10 can be accurately detected.

[0062] Please also read Figure 6 and Figure 7 , is a schematic structural diagram of an electric toothbrush 200 provided in an embodiment of the utility model. The electric toothbrush 200 includes a handle 201, a brush head 202 and a motor module 100. The brush head 202 is connected to the rotating shaft 15 of the servo motor, and the motor module 100 is arranged on the handle 201.

[0063] In this embodiment, the servo motor shaft 15 is connected to the brush head 202, and the servo motor can drive the brush head 202 to vibrate through the shaft 15, so that the user can clean the oral cavity. In addition, the motor module 100 of the embodiment has a high detection accuracy of the Hall element, which can accurately detect the current position of the motor rotor.

[0064] Exemplarily, the motor module 100 further includes a housing 203, the housing 203 is provided on the handle 201, the stator is mounted on the housing 203, a sealing ring 204 is sleeved on one end of the housing 203, and the side of the sealing ring 204 facing away from the housing 203 abuts against the handle 201. In this way, the sealing ring 204 is used to seal, so that foreign matter such as water and dust can be prevented from entering the handle 201 from the connection between the housing 203 and the handle 201, causing the servo motor in the handle 201 to short-circuit or be damaged.

[0065] Optionally, the housing 203 may be a bracket of the motor module 100 of the embodiment, or the housing 203 and the bracket are different components, which is not specifically limited in this embodiment.

[0066] The embodiment of the utility model provides an electric toothbrush 200, in which the Hall element of the motor module 100 has high detection accuracy and can accurately detect the current position of the rotor of the motor.

[0067] The above is a detailed introduction to a motor module and an electric toothbrush disclosed in the embodiment of the present invention. This article uses individual examples to illustrate the principle and implementation method of the present invention. The description of the above embodiments is only used to help understand the motor module and electric toothbrush of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In addition, the above-mentioned specific implementation methods can be combined or selected. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A motor module, characterized in that: include: A servo motor, the servo motor comprising a stator and a rotor, one of the stator and the rotor being provided with a permanent magnet, and the other being provided with a coil winding, wherein the coil winding has an outlet terminal; an induction magnet, wherein the induction magnet is fixed to the rotor so as to rotate along with the rotor; as well as A Hall element, wherein the Hall element and the output terminal are respectively located at two opposite ends of the stator along a first direction, wherein the first direction is the extension direction of the rotation axis of the rotor, and the Hall element is used to detect the magnetic field of the induction magnet to detect the current position of the rotor.

2. The motor module according to claim 1, characterized in that: The stator has a first end and a second end which are arranged opposite to each other in the first direction. The servo motor also includes a rotating shaft, one end of which is fixed to the rotor to rotate with the rotor, and the other end of the rotating shaft extends out of the first end. One of the output terminal and the Hall element is located at the first end, and the other is located at the second end.

3. The motor module according to claim 1, characterized in that: The induction magnet and the Hall element are located at the same end of the stator.

4. The motor module according to claim 1, characterized in that: The motor module also includes a bracket and a main board. The stator is arranged on the bracket, and the main board is arranged on the bracket. The main board extends from one end of the stator to the other end to be electrically connected to the output terminal and the Hall element.

5. The motor module according to claim 4, characterized in that: The main board has a first power connection portion and a second power connection portion, the first power connection portion and the second power connection portion are arranged at intervals along the extension direction of the main board, the first power connection portion is located at a position of the main board close to an end of the stator provided with the outlet terminal, and the first power connection portion is electrically connected to the outlet terminal, the second power connection portion is located at a position of the main board close to an end of the stator provided with the Hall element, and the second power connection portion is electrically connected to the Hall element.

6. The motor module according to claim 4, characterized in that: The main board is arranged on a side of the bracket away from the stator, the bracket is provided with a first wire-passing hole, and the outlet terminal is passed through the first wire-passing hole to be electrically connected with the main board.

7. The motor module according to claim 4, characterized in that: The main board is arranged on a side of the bracket facing away from the stator. The motor module also includes a flexible circuit board, which includes a main body and a lead-out part. The main body is arranged at one end of the stator, the Hall element is arranged on the main body, and the lead-out part is arranged on the main body. The lead-out part extends from a side of the bracket toward the stator, around the circumference of the bracket to a side of the bracket facing away from the stator, and is electrically connected to the main board.

8. The motor module according to any one of claims 4 to 7, characterized in that: The bracket comprises a first part and a second part, the first part and the second part are covered and connected to form a containing cavity, and the stator, the Hall element and the induction magnet are located in the containing cavity.

9. The motor module according to any one of claims 4 to 7, characterized in that: A first positioning portion is provided on the circumferential side of the stator, and a second positioning portion is provided on the bracket. The second positioning portion is used to cooperate with the first positioning portion to position the stator and the bracket.

10. The motor module according to claim 1, characterized in that: The motor module also includes a mounting seat and a flexible circuit board. The mounting seat is fixedly connected to one end of the stator. The flexible circuit board is arranged on a side of the mounting seat away from the stator. The Hall element is arranged on the flexible circuit board.

11. The motor module according to claim 10, characterized in that: The servo motor also includes a rotating shaft, one end of which is fixed to the rotor to rotate with the rotor, the other end of the rotating shaft extends and protrudes from one end of the stator where the mounting seat is provided, and the rotating shaft passes through the mounting seat, the induction magnet is sleeved on the part of the rotating shaft located in the mounting seat, or the other end of the rotating shaft protrudes from one end of the stator away from the mounting seat.

12. The motor module according to claim 10, characterized in that: The motor module also includes a reinforcement member, which is arranged on a side of the flexible circuit board away from the mounting seat, and at least a portion of the reinforcement member is arranged corresponding to the Hall element, and the reinforcement member is used to improve the strength of the flexible circuit board.

13. The motor module according to claim 10, characterized in that: The motor module also includes a bracket and a main board, the stator is arranged on the bracket, the main board is arranged on the bracket, the main board extends from one end of the stator to the other end to be electrically connected to the output terminal and the Hall element, a third positioning portion is provided on the peripheral side of the mounting seat, and the bracket is provided with a fourth positioning portion, and the fourth positioning portion is used to cooperate with the third positioning portion to position the mounting seat and the bracket.

14. The motor module according to claim 1, characterized in that: The servo motor also includes a rotating shaft, one end of which is fixed to the rotor to rotate with the rotor, one end of the stator is provided with a bearing hole and a second wire hole, the bearing hole is located on the end surface of one end of the stator, the bearing hole is provided with a bearing, the other end of the rotating shaft is connected to the bearing, and the second wire hole is located on the circumferential side of one end of the stator.

15. The motor module according to claim 4, characterized in that: The servo motor also includes a rotating shaft, one end of which is fixed to the rotor to rotate with the rotor, and the other end of the rotating shaft extends and protrudes from the stator, and the end of the rotating shaft protruding from the stator has a flat portion, and the flat portion is used to install a brush head of an electric toothbrush, and the bristles of the brush head are oriented in the same direction as the first plane of the flat portion. When the servo motor is in a reset state, the first plane is arranged parallel to the plane where the main board is located.

16. An electric toothbrush, characterized in that: It comprises a handle, a brush head and a motor module as claimed in any one of claims 1 to 15, wherein the brush head is connected to the rotating shaft of the servo motor, and the motor module is arranged on the handle.

17. The electric toothbrush according to claim 16, characterized in that: The motor module also includes a shell, which is arranged on the handle, and the stator is installed on the shell. A sealing ring is sleeved on one end of the shell, and the peripheral side of the sealing ring facing away from the shell abuts against the handle.

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