Motor and oral care device

Abstract

The embodiment of the utility model discloses a motor and oral care equipment. The motor comprises a stator and a circuit board, the stator comprises a stator shell and a stator core, a stator winding and a mounting bracket which are mounted in the stator shell, the stator winding is wound on the mounting bracket, the mounting bracket is connected with the stator core, and one end of the mounting bracket extends in the axial direction of the motor to form a mounting part. And the circuit board is positioned in the stator shell and is connected with the mounting part. According to the technical scheme, the size of the motor can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oral cleaning, in particular to a motor and an oral care device. BACKGROUND

[0002] At present, oral care devices, such as toothbrushes, usually adopt a servo motor as a driving member, which can allow the oral care device to have a larger cleaning angle. However, the length of the motor assembly in the related art is relatively long, and the size is relatively large, which affects the miniaturization design of the motor and the oral care device. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the present application provide a motor and an oral care device, aiming to reduce the size of the motor.

[0004] The first aspect of the embodiments of the present application provides a motor, which comprises:

[0005] a stator comprising a stator shell, a stator core, a stator winding, and a mounting bracket installed in the stator shell, the stator winding being wound around the mounting bracket, the mounting bracket being connected to the stator core, and one end of the mounting bracket extending along the axial direction of the motor to form a mounting portion; and

[0006] a circuit board located in the stator shell and connected to the mounting portion.

[0007] Optionally, the mounting bracket comprises:

[0008] a first bracket provided at one end of the stator along the axial direction of the motor; and

[0009] a second bracket provided at the other end of the stator along the axial direction of the motor and spaced apart from the first bracket;

[0010] wherein the mounting portion is provided on the side of the first bracket away from the second bracket.

[0011] Optionally, one of the mounting bracket and the circuit board is provided with a buckle, and the other is provided with a clamping groove, and the buckle is clamped in the clamping groove; and / or,

[0012] one of the mounting bracket and the circuit board is provided with a positioning protrusion, and the other is provided with a positioning groove, and the positioning protrusion is inserted into the positioning groove.

[0013] Optionally, the circuit board is provided with a clamping groove and a positioning groove, the mounting portion comprises an inner baffle and an outer baffle spaced apart along the radial direction of the motor, the inner baffle is closer to the central axis of the motor than the outer baffle, and a wire slot is defined between the inner baffle and the outer baffle;

[0014] At least one of the inner baffle and the outer baffle is provided with a buckle, and at least one of the inner baffle and the outer baffle is provided with a positioning protrusion, the buckle is clamped in the clamping groove, and the positioning protrusion penetrates the positioning groove.

[0015] Optionally, at least one of the inner baffle and the outer baffle is configured to form a stepped surface, the positioning protrusion protrudes from the stepped surface, and the part of the buckle penetrating the clamping groove and the stepped surface clamp two surfaces of the circuit board opposite in the axial direction of the motor.

[0016] Optionally, the number of stepped surfaces is at least two, and the at least two stepped surfaces are coplanarly arranged, and the at least two stepped surfaces are perpendicular to the axial direction of the motor.

[0017] Optionally, the outer baffle is provided with the stepped surface, and along the axial direction of the motor, the stepped surface is flush with the top surface of the inner baffle, or the stepped surface is closer to the circuit board than the top surface of the inner baffle.

[0018] Optionally, the part of the buckle penetrating the clamping groove is a clamping hook connected with the circuit board, and the clamping hook is located on the side of the buckle away from the winding groove; and / or,

[0019] The positioning protrusion has a hot melt part, and the hot melt part is hot melt connected with the circuit board.

[0020] Optionally, the buckle and the positioning protrusion are arranged on the outer baffle.

[0021] Optionally, along the axial direction of the motor, the length of the outer baffle is greater than the length of the inner baffle.

[0022] Optionally, along the radial direction of the motor, the outer baffle is arranged in a spaced manner with the stator shell.

[0023] Optionally, the number of the outer baffle and the inner baffle is at least two, at least two outer baffles are arranged in a spaced manner along the circumferential direction of the mounting portion, at least two inner baffles are arranged in a spaced manner along the circumferential direction of the mounting portion, and at least two outer baffles and at least two inner baffles are arranged in a one-to-one opposite manner.

[0024] The buckle and the positioning protrusion are arranged in a spaced manner along the circumferential direction of the mounting portion, and are arranged on at least two outer baffles, respectively.

[0025] Optionally, along the circumferential direction of the motor, the width of the outer baffle is less than the width of the inner baffle.

[0026] Optionally, the mounting bracket further comprises a winding portion connected to a side of the mounting portion away from the circuit board, the winding portion being provided with a wire receiving groove; the wire passing groove is in communication with the wire receiving groove, and the stator winding is wound around the wire passing groove and the wire receiving groove.

[0027] Optionally, the motor further comprises:

[0028] a rotor rotatably arranged inside the stator; and

[0029] a detection assembly comprising a magnetic induction piece and a magnetic piece, the magnetic induction piece being connected to the circuit board, and the magnetic piece being connected to the rotor.

[0030] Optionally, the mounting portion is provided with a buckle, the circuit board is provided with a clamping groove, the buckle is clamped in the clamping groove, and / or the mounting portion is provided with a positioning protrusion, the circuit board is provided with a positioning groove, and the positioning protrusion is arranged in the positioning groove.

[0031] In the above embodiment, the magnetic induction piece is closer to the central axis of the motor than the clamping groove and / or the positioning groove.

[0032] Another aspect of the embodiment of the present application provides an oral care device, the oral care device comprising:

[0033] a handle comprising the motor according to any one of the above embodiments; and

[0034] a care piece connected to the rotating shaft of the motor.

[0035] Based on the above embodiment, in the technical solution of the present application, the mounting bracket is arranged in the stator housing, the mounting bracket is provided with a mounting portion, the circuit board is fixed in the stator housing through the mounting portion, so as to install the circuit board in the space inside the stator housing, thereby improving the space utilization rate of the stator housing; compared with the related art, the circuit board of the embodiment of the present application is directly fixed through the mounting bracket of the stator, without the need for additionally arranging a mounting seat, thereby reducing the number of parts, and the length of the motor can be prevented from being increased due to the additional mounting seat, so that the structure of the motor of the present application is more compact, the length is reduced, and the miniaturization design of the motor and the oral care device using the motor is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0037] Figure 1A schematic structural view of a motor in an embodiment of the present application;

[0038] Figure 2 A schematic structural view of a motor in an embodiment of the present application; Figure 1 A schematic structural view of a motor in an embodiment of the present application;

[0039] Figure 3 A schematic structural view of a motor in an embodiment of the present application; Figure 1 A schematic structural view of a motor in an embodiment of the present application;

[0040] Figure 4 A schematic structural view of a motor in an embodiment of the present application;

[0041] Figure 5 A schematic structural view of a motor in an embodiment of the present application; Figure 3 A schematic structural view of a motor in an embodiment of the present application;

[0042] Figure 6 A schematic structural view of a motor in an embodiment of the present application;

[0043] Figure 7 A schematic structural view of a motor in an embodiment of the present application;

[0044] Figure 8 A schematic structural view of a motor in an embodiment of the present application;

[0045] Figure 9 A schematic structural view of a motor in an embodiment of the present application;

[0046] Figure 10 A schematic structural view of a motor in an embodiment of the present application; Figure 9 A schematic structural view of a motor in an embodiment of the present application;

[0047] Reference signs: 100, motor; 101, driving assembly; 10, stator; 11, stator shell; 111, mounting cavity; 113, assembly opening; 13, mounting support; 13a, first support; 13b, second support; 131, mounting portion; 131a, wire passing groove; 1311, outer baffle; 1313, inner baffle; 1315, buckle; 1316, hook; 1317, positioning protrusion; 1319, step surface; 133, winding portion; 133a, wire receiving groove; 15, stator core; 17, stator winding; 30, rotor; 31, rotor core; 33, rotor magnetic member; 50, circuit board; 51, clamping groove; 53, positioning groove; 55, avoiding hole; 70, detection assembly; 71, magnetic induction member; 73, magnetic member; 80, rotating shaft; 90, end cover; 91, wire passing hole; 93, bearing; 200, wire. DETAILED DESCRIPTION

[0048] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0049] The oral care device can be an electric toothbrush, etc., comprising a handle and a care member. The handle comprises a motor and a partially exposed rotating shaft arranged in the handle, and the motor is used to drive the rotating shaft to rotate.

[0050] In combination Figures 1 to 3 , the motor 100 comprises a driving assembly 101, a circuit board 50 and a detection assembly 70. The driving assembly 101 is used to drive the rotating shaft 80 to rotate under the control of the circuit board 50, and the detection assembly 70 is used to detect the running state of the driving assembly 101. The care member is connected with the exposed part of the rotating shaft 80 and can rotate with the rotating shaft 80. The care member can be a brush head, which can realize the cleaning of the oral cavity by rotating with the rotating shaft 80.

[0051] Specifically, in the present application, the driving assembly 101 comprises a stator 10 and a rotor 30. The stator 10 is used to drive the rotor 30 to rotate and defines a rotating space. The rotor 30 is rotatably arranged in the rotating space and connected with the rotating shaft 80, so that the rotor 30 drives the rotating shaft 80 to rotate when the rotor 30 rotates.

[0052] As shown in Figure 3 , the stator 10 comprises a stator shell 11, a stator core 15 and a stator magnetic member. The rotor 30 comprises a rotor core 31 and a rotor magnetic member 33. The stator shell 11 is provided with a mounting cavity 111, the stator core 15 is arranged in the mounting cavity 111, and the stator magnetic member is connected with the stator core 15. The stator core 15 extends along the axial direction of the motor 100 and is arranged in a substantially cylindrical shape, thereby defining a rotating space in the middle part of the stator core 15. The rotor core 31 is rotatably arranged in the rotating space, and the rotor magnetic member 33 is connected with the rotor core 31. The rotating shaft 80 is connected with at least one of the rotor core 31 and the rotor magnetic member 33 to rotate with the rotor 30.

[0053] It should be noted that the axial direction of the motor 100 in the present application can be understood as the direction perpendicular to the rotation direction of the rotating shaft 80, and the motor 100 as a whole presents a long cylindrical structure. In some related technologies, the circuit board is arranged outside the stator shell, and the rotating shaft is exposed from one end of the stator shell, and the circuit board is usually arranged on the other end side of the stator shell away from the exposed part of the rotating shaft. For example, the related technology adopts a mounting seat connected to one end of the stator shell, and the circuit board is mounted on the mounting seat. It can be seen that the circuit board is arranged outside the stator shell, and the additional mounting seat and other structures will undoubtedly increase the occupied space of the motor, making the overall length of the motor in the axial direction larger, affecting the miniaturization design of the motor and the oral care device.

[0054] Therefore, please refer to Figure 3 and Figure 4 In the embodiment of the present application, the stator 10 further comprises a mounting bracket 13 installed in the stator shell 11. The mounting bracket 13 is arranged in the stator core 15, and the stator magnetic member is connected to the mounting bracket 13. Specifically, a plurality of mounting grooves are provided on the stator core 15, the mounting grooves are arranged at intervals along the circumference of the stator core 15, and are all connected to the rotating space in the middle of the stator core 15, and part of the mounting bracket 13 is arranged in the mounting groove. In some structure forms in which the stator magnetic member is the stator winding 17, the stator winding 17 is wound on the mounting bracket 13.

[0055] In the embodiment of the present application, the mounting bracket 13 is provided with a mounting portion 131 at one end in the axial direction of the motor 100, and the mounting portion 131 is also located in the stator shell 11, and the circuit board 50 is connected to the mounting portion 131. Please refer to Figure 3 , the mounting portion 131 is exposed at one end of the stator core 15 and extends along the axial direction of the motor 100, and the circuit board 50 is connected to the mounting portion 131 by one or more of clamping, screwing and bonding. From the above structure, the circuit board 50 is directly connected to the stator 10 and arranged in the stator shell 11.

[0056] In this way, in the technical solution of the present application, the mounting bracket 13 is arranged in the stator shell 11, the mounting bracket 13 is provided with the mounting portion 131, the circuit board 50 is fixed in the stator shell 11 through the mounting portion 131, so as to install the circuit board 50 in the space inside the stator shell 11, improve the space utilization rate of the stator shell 11, compared with the related art, the circuit board 50 of the embodiment of the present application is directly fixed through the mounting bracket 13 of the stator 10, without the need for additional mounting seat, reducing the number of parts, and avoiding the increase of the length of the motor 100 caused by the additional mounting seat, thereby making the structure of the motor 100 of the present application more compact, the length is reduced, which is conducive to the miniaturization design of the motor 100 and the oral care device applying the motor 100.

[0057] like Figures 4 to 7 As shown, in some embodiments, the mounting bracket 13 includes a first bracket 13a and a second bracket 13b, which are independently formed. The first bracket 13a is disposed at one end of the stator 10 along the axial direction of the motor 100, and the second bracket 13b is disposed at the other end of the stator 10 along the axial direction of the motor 100, and is spaced apart from the first bracket 13a. The stator magnetic component is connected to both the first bracket 13a and the second bracket 13b. The mounting portion 131 is disposed on the side of the first bracket 13a away from the second bracket 13b and is exposed outside the stator core 15. In these embodiments, the mounting portion 131 serves to fix the circuit board 50, and the mounting portion 131 is disposed on the first bracket 13a. The second bracket 13b does not require fixing the circuit board 50, therefore the second bracket 13b does not have a mounting portion 131. Since the mounting portion 131 extends along the axial direction of the motor 100 relative to the mounting bracket 13, and the mounting portion 131 is provided only on the first bracket 13a, instead of using a completely symmetrical first bracket 13a and second bracket 13b, it is possible to avoid excessive occupation of the internal space of the stator housing 11 and avoid increasing the length of the motor 100. In addition, the spaced-apart first bracket 13a and second bracket 13b, while serving to connect the stator magnetic components, can also save materials, reduce costs, and lighten the weight of the motor 100, which is beneficial for the lightweight design of the motor 100.

[0058] Of course, in some other embodiments of this application, the mounting bracket 13 may also adopt an integrally molded structural design to improve structural integrity. This application does not limit this.

[0059] For some stator magnetic components with a stator winding 17 structure, the mounting bracket 13 also includes a winding portion 133 connected to the side of the mounting portion 131 away from the circuit board 50. The winding portion 133 is disposed in the mounting groove and internally defines a wire receiving groove 133a. A portion of the stator winding 17 is located in the wire receiving groove 133a to improve the stability of the stator winding 17.

[0060] Regarding the mating relationship between the mounting part 131 and the circuit board 50, optionally, one of the mounting bracket 13 and the circuit board 50 is provided with a buckle 1315 and the other is provided with a slot 51. The buckle 1315 is engaged in the slot 51, thereby realizing the buckle 1315 connection between the mounting part 131 and the circuit board 50, which is convenient for disassembly and assembly. Alternatively, one of the mounting bracket 13 and the circuit board 50 is provided with a positioning protrusion 1317 and the other is provided with a positioning groove 53. The positioning protrusion 1317 passes through the positioning groove 53 to realize the positioning and mating of the mounting part 131 and the circuit board 50. This can realize the positioning of the circuit board 50 and the mounting part 131 during installation, improving installation efficiency and positioning accuracy.

[0061] Please refer to Figure 5 and Figure 6 In an embodiment of the present application, the circuit board 50 is provided with the clamping groove 51 and the positioning groove 53, and the mounting portion 131 is provided with the clamping buckle 1315 and the positioning protrusion 1317, the clamping buckle 1315 is clamped in the clamping groove 51, and the positioning protrusion 1317 is penetrated in the positioning groove 53.

[0062] Exemplarily, the mounting portion 131 includes the inner baffle 1313 and the outer baffle 1311 which are arranged along the radial direction of the motor 100, the inner baffle 1313 is closer to the central axis of the motor 100 than the outer baffle 1311, and the inner baffle 1313 and the outer baffle 1311 define the wire passing groove 131a. The wire passing groove 131a is communicated with the wire receiving groove 133a, the stator winding 17 is wound on the wire passing groove 131a and the wire receiving groove 133a, and the inner baffle 1313 and the outer baffle 1311 can guide and limit the wire 200 of the stator winding 17, which can not only improve the winding efficiency when winding, but also improve the stability of the stator winding 17.

[0063] In the embodiment, at least one of the inner baffle 1313 and the outer baffle 1311 is provided with the clamping buckle 1315, and at least one of the inner baffle 1313 and the outer baffle 1311 is provided with the positioning protrusion 1317, the clamping buckle 1315 is clamped in the clamping groove 51, and the positioning protrusion 1317 is penetrated in the positioning groove 53. It can be understood that the clamping buckle 1315 and the positioning protrusion 1317 can be both arranged on the inner baffle 1313, or both arranged on the outer baffle 1311, or the positioning protrusion 1317 is arranged on the inner baffle 1313 and the clamping buckle 1315 is arranged on the outer baffle 1311, or the positioning protrusion 1317 is arranged on the outer baffle 1311 and the clamping buckle 1315 is arranged on the inner baffle 1313, which is not limited in the embodiment of the present application. In this way, in the embodiment, the positioning protrusion 1317 of the mounting portion 131 is matched with the positioning groove 53 on the circuit board 50, which is convenient for installation and positioning, improves the installation efficiency and the position accuracy of the circuit board 50, and the clamping buckle 1315 of the mounting portion 131 is matched with the clamping groove 51 on the circuit board 50, which makes the disassembly and assembly of the circuit board 50 on the mounting portion 131 more convenient and improves the disassembly and assembly efficiency. Moreover, in the embodiment, the cooperation of the clamping buckle 1315 and the clamping groove 51 and the cooperation of the positioning protrusion 1317 and the positioning groove 53 can realize the fixation of the circuit board 50 on the mounting portion 131 in the circumferential direction and the axial direction of the motor 100, which improves the stability of the circuit board 50.

[0064] It can be understood that in other embodiments of the application, the positioning groove 53 and the clamping groove 51 can also be arranged on the mounting portion 131, and the positioning protrusion 1317 and the clamping buckle 1315 can also be arranged on the circuit board 50, and the fixing connection of the circuit board 50 and the mounting portion 131 can also be achieved. In the above embodiment of the application, the circuit board 50 is provided with the clamping groove 51 and the positioning groove 53, and the mounting portion 131 is provided with the clamping buckle 1315 and the positioning protrusion 1317, so that the complexity of the circuit board 50 can be reduced, and the molding of the mounting bracket 13 and the circuit board 50 is facilitated. The following will continue to explain and describe the structure that the circuit board 50 is provided with the clamping groove 51 and the positioning groove 53, and the mounting portion 131 is provided with the clamping buckle 1315 and the positioning protrusion 1317.

[0065] Please refer to Figure 6 and Figure 7 In an embodiment, the number of the outer baffles 1311 and the number of the inner baffles 1313 are both at least two, the at least two outer baffles 1311 are arranged at intervals along the circumference of the mounting portion 131, the at least two inner baffles 1313 are arranged at intervals along the circumference of the mounting portion 131, and the at least two outer baffles 1311 and the at least two inner baffles 1313 are arranged one by one opposite to each other, and the clamping buckle 1315 and the positioning protrusion 1317 are arranged at intervals along the circumference of the mounting portion 131. Among them, the plurality of interval arranged outer baffles 1311 and the plurality of interval arranged inner baffles 1313 not only facilitate the molding of the clamping buckle 1315 and the positioning protrusion 1317, but also can reduce the material and reduce the weight of the motor 100. It is worth mentioning that the mounting portion 131 can also be provided with a single annular outer baffle 1311 and a single annular inner baffle 1313, and the embodiments of the application do not limit this.

[0066] In some examples, the clamping buckle 1315 and the positioning protrusion 1317 are both arranged on the outer baffle 1311. For example, the clamping buckle 1315 and the positioning protrusion 1317 are arranged on different outer baffles 1311, and further, the number of the clamping buckles 1315 and the number of the positioning protrusions 1317 are both multiple, the plurality of clamping buckles 1315 and the plurality of positioning protrusions 1317 are arranged alternately along the circumference of the mounting portion 131, and correspondingly, the plurality of clamping grooves 51 and the plurality of positioning grooves 53 on the circuit board 50 are also arranged alternately along the circumference of the circuit board 50, so that the uniformity of the clamping and positioning cooperation of the circuit board 50 and the mounting portion 131 can be improved, thereby improving the structural stability. In addition, since the wire 200 of the stator winding 17 is easy to contact with the inner baffle 1313 when winding the stator winding 17, arranging the clamping buckle 1315 and the positioning protrusion 1317 on the outer baffle 1311 can effectively avoid the interference of the clamping buckle 1315 and the positioning protrusion 1317 with the winding process, ensure smooth winding, and avoid damaging the wire 200.

[0067] Further, along the radial direction of the motor 100, the outer baffle 1311 is spaced apart from the stator housing 11, avoiding interference between the stator core 15 and the mounting bracket 13 during installation into the stator housing 11, improving the smoothness of assembly.

[0068] In embodiments where the number of outer baffles 1311 and inner baffles 1313 is at least two, along the axial direction of the motor 100, the length h2 of the outer baffle 1311 is greater than the length h1 of the inner baffle 1313. In these embodiments, the buckle 1315 and the positioning protrusion 1317 are both provided on the outer baffle 1311, which makes the length of the outer baffle 1311 greater. On the one hand, this makes the buckle 1315 and the positioning protrusion 1317 farther away from the winding slot along the axial direction of the motor 100, avoiding interference between the buckle 1315 and the positioning protrusion 1317 and the wire 200 during winding, thereby avoiding wire breakage and paint wear. On the other hand, the longer outer baffle 1311 has better deformation ability and better elasticity, which can adaptively and elastically adjust during installation, absorb manufacturing tolerances, improve the connection stability of the circuit board 50 and the mounting portion 131, and help maintain the circuit board 50 level.

[0069] Further, along the circumferential direction of the motor 100, the width d2 of the outer baffle 1311 is less than the width d1 of the inner baffle, thereby further increasing the deformation ability of the outer baffle 1311 and further improving the elasticity of the outer baffle 1311, thereby improving the ability of the outer baffle 1311 to absorb manufacturing tolerances and improving the compatibility of the mounting portion 131.

[0070] Please refer to Figure 5 and Figure 7 In a specific embodiment, one end of the buckle 1315 is fixed, and the other end has a hook 1316, which is a hook-shaped structure protruding towards the side of the buckle 1315. The clamping groove 51 is a groove structure penetrating along the thickness direction of the circuit board 50. In this embodiment, the thickness direction of the circuit board 50 is parallel to the axial direction of the motor 100. When the buckle 1315 is matched with the clamping groove 51, the part of the buckle 1315 that penetrates out of the clamping groove 51 is the hook, which connects the circuit board 50. The hook 1316 can limit the movement of the circuit board 50 along the axial direction of the motor 100, and the one-to-one matching of the buckle 1315 and the clamping groove 51 can also limit the movement of the circuit board 50 relative to the mounting portion 131 along the circumferential direction of the motor 100, making it easy to disassemble while improving the connection stability of the circuit board 50.

[0071] Further, the hook 1316 is located on the side of the buckle 1315 away from the winding slot, further avoiding interference between the hook 1316 and the wire 200 during winding, thereby avoiding wire breakage and paint wear.

[0072] For the positioning protrusion 1317, the positioning protrusion 1317 and the buckle 1315 can be arranged on different outer baffles 1311. Alternatively, the positioning protrusion 1317 can be in the shape of a long strip extending in the axial direction of the motor 100, and the positioning groove 53 is a groove structure on the circuit board 50 corresponding to the cross-sectional shape of the positioning protrusion 1317. For example, the cross-sectional shape of the positioning protrusion 1317 is rectangular, and the positioning groove 53 is a rectangular groove to reduce or avoid the loosening of the positioning protrusion 1317 in the positioning groove 53. The positioning groove 53 can also be a groove structure extending through the thickness of the circuit board 50, and the positioning protrusion 1317 partially penetrates the positioning groove 53.

[0073] Further, the positioning protrusion 1317 is provided with a hot melt portion, and the hot melt portion is hot melt connected with the circuit board 50. For example, the hot melt portion is the part of the positioning protrusion 1317 located in the positioning groove 53. During installation, hot melt adhesive is filled between the hot melt portion and the groove wall of the positioning groove 53 to fixedly connect the positioning protrusion 1317 with the circuit board 50, improve the connection tightness of the circuit board 50 with the mounting portion 131, and improve the connection reliability.

[0074] Please continue to refer to Figure 5 and Figure 7 In some embodiments, at least one of the inner baffle 1313 and the outer baffle 1311 is configured to form a step surface 1319, the buckle 1315 penetrates the card groove 51, and the buckle 1315 and the step surface 1319 clamp the two surfaces of the circuit board 50 opposite in the axial direction of the motor 100 to sufficiently limit the movement of the circuit board 50 relative to the mounting portion 131 in the axial direction of the motor 100, thereby improving the stability of the circuit board 50.

[0075] The number of step surfaces 1319 is at least two. The at least two step surfaces 1319 can be arranged on the inner baffle 1313, on the outer baffle 1311, or on both the inner baffle 1313 and the outer baffle 1311. In this embodiment, the number of step surfaces 1319 is not limited. The at least two step surfaces 1319 are coplanar, and the at least two step surfaces 1319 are perpendicular to the axial direction of the motor 100. In this way, the circuit board 50 placed on the at least two step surfaces 1319 can remain horizontal, maintaining sufficient contact area between the circuit board 50 and the step surface 1319, improving the stability of the circuit board 50, and avoiding the circuit board 50 from being tilted, thereby maintaining the perpendicularity between the circuit board 50 and the rotating shaft 80, and avoiding the interference between the circuit board 50 and the rotating shaft 80.

[0076] In an embodiment, the step surface 1319 is arranged on the outer baffle 1311, and in the axial direction of the motor 100, the step surface 1319 is flush with the top surface of the inner baffle 1313, or the step surface 1319 is closer to the circuit board 50 than the top surface of the inner baffle 1313. In this way, the inner baffle 1313 can be prevented from lifting the circuit board 50, causing instability of the circuit board 50.

[0077] Optionally, in the structure form that the positioning protrusion 1317 is arranged on the outer baffle 1311, the step surface 1319 and the positioning protrusion 1317 can be arranged on the same outer baffle 1311, and the positioning protrusion 1317 protrudes from the step surface 1319. In combination Figure 7 , the positioning protrusion 1317 is located in the middle of the outer baffle 1311, and the two step surfaces 1319 are formed on the two sides of the positioning protrusion 1317. In this way, the positioning protrusion 1317 and the step surface 1319 are integrated on the same outer baffle 1311, which simplifies the structure of the mounting portion 131 and makes the overall structure of the mounting portion 131 and the circuit board 50 more compact, which is conducive to reducing the size of the motor 100. Of course, the step surface 1319 and the positioning protrusion 1317 can also be arranged on different outer baffles 1311, which is not limited herein.

[0078] After the circuit board 50 is installed, the stator winding 17 is electrically connected with the circuit board 50, and under the control of the circuit board 50, the rotor 30 rotates relative to the stator 10. The detection assembly 70 is used for detecting the rotation state of the rotor 30. In the related art, the detection element in the detection assembly is installed on the circuit board, and the circuit board is installed on the mounting seat. Due to the error of the circuit board installed on the mounting seat and the error of the mounting seat connected with the stator shell, the cumulative error is large, the detection element is not accurately aligned, the detection error is large, and the subsequent calibration work is difficult.

[0079] Therefore, please combine Figures 8 to 10 , in some embodiments of the present application, the circuit board 50 is arranged in the stator shell 11, and the detection assembly 70 includes a magnetic induction piece 71 and a magnetic piece 73. The magnetic induction piece 71 is connected with the circuit board 50, the circuit board 50 is connected with the stator 10, the magnetic piece 73 is connected with the rotor 30, and the magnetic induction piece 71 and the magnetic piece 73 are arranged in a spaced manner and are used for sensing the magnetic field of the magnetic piece 73. In this way, when the rotor 30 rotates, the magnetic induction piece 71 remains stationary, and the magnetic piece 73 relatively rotates. That is, the magnetic induction piece 71 and the magnetic piece 73 can relatively rotate, the magnetic induction piece 71 detects the position, rotation angle and other information of the rotor 30 by sensing the change of the magnetic field, so as to control the motor 100.

[0080] It can be understood that in the embodiments of the present application, the circuit board 50 and the detection assembly 70 are arranged in the stator shell 11, the magnetic induction piece 71 is arranged on the circuit board 50, and the circuit board 50 and the magnetic piece 73 are directly connected with the stator 10 and the rotor 30 respectively, without the need to additionally arrange a mounting seat to install the circuit board 50. In this way, not only the number of parts can be reduced and the length of the motor 100 can be reduced, but also the assembly error of the circuit board 50 can be reduced, the alignment of the magnetic induction piece 71 and the magnetic piece 73 is more accurate, the calibration difficulty is reduced, thereby saving cost and improving the detection accuracy of the detection assembly 70 on the state of the rotor 30.

[0081] Specifically, in combination with Figure 8 and Figure 9 , the circuit board 50 is connected to the mounting bracket 13, and is provided with a clearance hole 55 in the middle part. The rotor magnetic member 33 is arranged on the outer periphery of the rotor core 31, and the magnetic member 73 is connected to the rotor magnetic member 33. The rotor core 31 is connected to the rotating shaft 80, and optionally, part of the rotor core 31 can be integrated with the rotating shaft 80. The rotor core 31 (the rotating shaft 80) is arranged through the clearance hole 55. The inner diameter of the clearance hole 55 is larger than the outer diameter of the rotor core 31. The hole wall of the clearance hole 55 is arranged in a spaced manner with the rotor core 31, so as to avoid the influence of the circuit board 50 on the rotation of the electronic core.

[0082] Optionally, the magnetic induction member 71 is a Hall element, and the magnetic member 73 is a magnet. The Hall element detects the movement position of the rotor 30 by sensing the magnetic field strength of the magnet.

[0083] Please continue to refer to Figure 8 In some embodiments, the magnetic member 73 is arranged at one end of the rotor magnetic member 33 close to the circuit board 50, so as to shorten the distance between the magnetic member 73 and the magnetic induction member 71, and facilitate the detection of the magnetic induction member 71. In one embodiment, the magnetic member 73 is arranged in a ring shape and is sleeved on the outer periphery of the rotating shaft 80. In this way, the stator 10 drives the rotation of the rotor magnetic member 33, and the magnetic member 73 rotates with the rotor magnetic member 33. The magnetic member 73 serves as the basis for the detection of the magnetic induction member 71 and does not play a transmission role, and the structure is simple and effective. Optionally, the magnetic member 73 is bonded to the end side of the rotor magnetic member 33 close to the circuit board 50. In this way, the connection between the magnetic member 73 and the rotor magnetic member 33 is improved, and the assembly of the magnetic member 73 is facilitated. Of course, in other embodiments, the magnetic member 73 can also be an integral component with the rotor magnetic member 33. The position, angle and other information of the rotor 30 are determined by the magnetic field of the integral structure of the magnetic member 73 and the rotor magnetic member 33 through the detection of the magnetic induction member 71.

[0084] In the embodiments of the present application, the projection of the magnetic member 73 coincides with the projection of the rotor magnetic member 33, or the projection of the magnetic member 73 is located in the projection of the rotor magnetic member 33 along the axial direction of the motor 100. That is, in the projection of the magnetic member 73 and the rotor magnetic member 33 along the axial direction of the motor 100, the outer contour of the magnetic member 73 is not greater than the outer contour of the rotor magnetic member 33. Since the air gap between the stator magnetic member and the rotor magnetic member 33 is small, if the size of the magnetic member 73 is too large, the magnetic member 73 may be scraped with the stator 10 during the rotation of the rotor 30 relative to the stator 10, which affects the normal movement of the motor 100. The embodiments of the present application limit the size of the magnetic member 73 to ensure the normal operation of the motor 100 and avoid interference.

[0085] Further, please refer to Figure 9In the embodiment of the present application, along the axial direction of the motor 100, the magnetic member 73 is closer to the magnetic induction member 71 than the stator magnetic member, so that the magnetic field of the stator magnetic member can be reduced to interfere with the magnetic induction member 71, and the magnetic induction member 71 can focus on detecting the magnetic field change of the magnetic member 73, so as to ensure the detection accuracy of the detection assembly 70.

[0086] In some embodiments, the magnetic induction member 71 and the magnetic member 73 are respectively arranged on the two sides of the circuit board 50. That is, the magnetic induction member 71 is arranged on the side of the circuit board 50 away from the magnetic member 73. It can be seen that the side of the circuit board 50 close to the magnetic member 73 is provided with the rotor core 31, the rotor magnetic member 33, the stator magnetic member, and the mounting bracket 13 and other structures, and the distance between the circuit board 50 and these structures is limited. Arranging the magnetic induction member 71 on the side of the circuit board 50 close to the magnetic member 73 not only has limited space, but also the magnetic induction member 71 is easy to interfere with the rotor core 31, the mounting bracket 13 and other structures, causing displacement or damage of the magnetic induction member 71, and the magnetic induction member 71 is more susceptible to the magnetic field interference of the stator magnetic member. In contrast, the side of the circuit board 50 away from the magnetic member 73 has fewer structures and a smoother surface. Arranging the magnetic induction member 71 on the side of the circuit board 50 away from the magnetic member 73 can avoid interference between the magnetic induction member 71 and other structures, and can also make the magnetic member 73 away from the stator magnetic member, further reducing the interference of the stator magnetic member on the magnetic induction member 71.

[0087] Further, the magnetic induction member 71 is closer to the central axis of the motor 100 than the clamping groove 51 and / or the positioning groove 53. In an embodiment, the circuit board 50 is provided with the clamping groove 51 and the positioning groove 53, which are used in cooperation with the clamping buckle 1315 and the positioning protrusion 1317 of the mounting bracket 13. The clamping buckle 1315 and the positioning protrusion 1317 of the mounting bracket 13 are arranged on the outer baffle 1311, that is, the clamping groove 51 and the positioning groove 53 are arranged close to the outer periphery of the circuit board 50. Please refer again to Figure 5 The magnetic member 73 is connected to the rotor magnetic member 33, and the projection of the magnetic member 73 on the circuit board 50 is closer to the center of the circuit board 50. The present embodiment makes the magnetic induction member 71 closer to the central axis of the motor 100, that is, the distance between the magnetic induction member 71 and the magnetic member 73 is shortened, so that the detection is more accurate.

[0088] In the embodiment of the present application, along the axial direction of the motor 100, the circuit board 50 and the magnetic member 73 are arranged at intervals, and the projection of the magnetic induction member 71 at least partially overlaps the projection of the magnetic member 73, so that the position of the magnetic induction member 71 and the magnetic member 73 can be aligned, the distance between the magnetic induction member 71 and the magnetic member 73 is further shortened, and the magnetic field decay of the magnetic member 73 is avoided to affect the detection accuracy.

[0089] In combination with the foregoing embodiments, to further ensure detection accuracy, at least one of the inner baffle 1313 and the outer baffle 1311 of the mounting portion 131 is configured with a stepped surface 1319, the buckle 1315 penetrates the clamping groove 51, and the buckle 1315 and the stepped surface 1319 clamp the two surfaces of the circuit board 50 opposite in the axial direction of the motor 100, so as to sufficiently limit the movement of the circuit board 50 in the axial direction of the motor 100 relative to the mounting portion 131, and improve the stability of the circuit board 50. Optionally, the number of stepped surfaces 1319 is at least two, and the at least two stepped surfaces 1319 can be arranged on the inner baffle 1313, or on the outer baffle 1311, or on both the inner baffle 1313 and the outer baffle 1311. The present embodiment does not make any limitation here. Among them, the at least two stepped surfaces 1319 are coplanar, and the at least two stepped surfaces 1319 are perpendicular to the axial direction of the motor 100. In this way, the circuit board 50 placed on the at least two stepped surfaces 1319 can be kept horizontal, improving the stability of the circuit board 50 and avoiding the circuit board 50 from being skewed, so as to maintain the parallel relationship between the magnetic induction piece 71 and the magnetic piece 73 on the circuit board 50, reduce errors, and ensure detection accuracy.

[0090] Please refer to Figure 2 , Figure 9 and Figure 10 In some embodiments, the stator housing 11 is provided with an assembly opening 113 communicating with the mounting cavity 111. The assembly opening 113 can be optionally arranged at one end of the stator housing 11 away from the exposed part of the rotating shaft 80. The stator core 15, the stator magnetic piece, the rotor core 31, and the rotor magnetic piece 33 are installed into the mounting cavity 111 through the assembly opening 113. The motor 100 further comprises an end cover 90 connected to the stator housing 11 and shielding at least part of the assembly opening 113 to prevent the devices in the mounting cavity 111 from falling out of the assembly opening 113.

[0091] Optionally, the end cover 90 is a metal piece. Of course, the end cover 90 can also be made of other materials with sufficient structural strength, and the present embodiment does not make any limitation thereon. One end of the rotating shaft 80 is connected to the end cover 90 through a bearing 93. The metal end cover 90 is hard and has high structural strength, which can provide sufficient structural support when the rotor 30 rotates, so that the rotor 30 is not easy to deviate in the radial direction of the motor 100, thereby reducing errors and improving the detection accuracy of the detection assembly 70.

[0092] In combination with Figure 10In an embodiment, the distance between the end cover 90 and the magnetic induction piece 71 along the axial direction of the motor 100 is L, which satisfies the relationship: L≤5mm. It can be understood that if the distance L between the end cover 90 and the magnetic induction piece 71 is greater than 5mm, the space between the end cover 90 and the magnetic induction piece 71 is too large, which undoubtedly increases the overall length of the motor 100, which is not conducive to the miniaturization design of the motor 100. Therefore, the embodiment limits the distance L between the end cover 90 and the magnetic induction piece 71 to be ≤5mm, which can reduce the size of the motor 100, and L can be selected as 3mm, 4mm, 5mm, etc.

[0093] The circuit board 50 is electrically connected to the main controller of the oral care device through the lead wire 200. In the embodiment of the application, the side of the circuit board 50 facing the end cover 90 is provided with a terminal, and the end cover 90 is provided with a wire hole 91 communicating with the outside and the mounting cavity 111. The wire hole 91 and the terminal are arranged opposite to each other in the axial direction of the motor 100. The lead wire 200 enters the mounting cavity 111 through the wire hole 91 of the end cover 90 and is connected to the terminal. In this way, the embodiment of the application does not need to open a hole on the stator shell 11 for the lead wire 200 to pass through, which simplifies the structure of the stator shell 11 and facilitates production and manufacturing. Moreover, the wire hole 91 and the terminal are opposite to each other, and the lead wire 200 does not need to be bent, so that the lead wire 200 is relatively short and the material cost is saved.

[0094] It can be understood that the magnetic piece 73 is located on the side of the circuit board 50 away from the end cover 90, so that the magnetic piece 73 and the lead wire 200 connected to the terminal are spaced apart, avoiding the wear of the lead wire 200 by the magnetic piece 73. It is worth mentioning that the side of the circuit board 50 away from the magnetic piece 73 is also provided with a connection terminal. In the structure in which the stator magnetic piece is the stator winding 17, the power connection end of the wire harness of the stator winding 17 passes through the circuit board 50 and is electrically connected to the connection terminal. It can be seen that the connection terminal is also arranged on the side of the circuit board 50 facing the end cover 90, that is, the connection terminal can be exposed through the assembly opening 113, which facilitates welding operation and improves assembly efficiency.

[0095] The above is the explanation and description of the specific structure of the motor 100 according to the embodiment of the application. It can be understood that the oral care device according to the embodiment of the application adopts all the schemes of the above-mentioned embodiments, and therefore has all the effects mentioned above, which will not be described in detail here.

[0096] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration and cannot be understood as a limitation on the present application, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0097] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electric machine characterized in that, The application relates to a motor stator and a circuit board. The stator comprises a stator shell, a stator core, a stator winding, a mounting bracket, and a mounting portion. The stator winding is arranged on the mounting bracket.

2. The electric machine of claim 1, wherein, The mounting bracket is connected to the stator core. One end of the mounting bracket extends along the motor axis to form the mounting portion. The circuit board is arranged in the stator shell and connected to the mounting portion. The mounting bracket comprises a first bracket and a second bracket.

3. The electric machine of claim 1, wherein, The first bracket is arranged at one end of the stator along the motor axis. The second bracket is arranged at the other end of the stator along the motor axis and spaced from the first bracket.

4. The electric machine of claim 1, wherein, The mounting portion is arranged on the side of the first bracket away from the second bracket. One of the mounting bracket and the circuit board is provided with a buckle, and the other is provided with a clamping groove.

5. The electric machine of claim 4, wherein, One of the mounting bracket and the circuit board is provided with a positioning protrusion, and the other is provided with a positioning groove.

6. The electric machine of claim 5, wherein, The circuit board is provided with a clamping groove and a positioning groove.

7. The electric machine of claim 5, wherein, The mounting portion comprises an inner baffle and an outer baffle arranged along the motor radial direction.

8. The electric machine of claim 4, wherein, The inner baffle is closer to the central axis of the motor than the outer baffle. The inner baffle and the outer baffle define a wire slot therebetween.

9. The electric machine of claim 4, wherein, At least one of the inner baffle and the outer baffle is provided with a buckle.

10. The electric machine of claim 9, wherein, The buckle is arranged in the clamping groove.

11. The electric machine of claim 9, wherein, At least one of the inner baffle and the outer baffle is provided with a positioning protrusion.

12. The electric machine of claim 4, wherein, The positioning protrusion is arranged in the positioning groove. The number of the step surfaces is at least two.

13. The electric machine of claim 12, wherein, The at least two step surfaces are coplanar. The at least two step surfaces are perpendicular to the motor axis. The outer baffle is provided with the step surface. The step surface is flush with the top surface of the inner baffle, or the step surface is closer to the circuit board than the top surface of the inner baffle. The part of the buckle protruding out of the clamping groove is a clamping hook connected to the circuit board. The clamping hook is arranged on the side of the buckle away from the wire slot. The positioning protrusion is provided with a hot melt portion. The hot melt portion is hot melt connected to the circuit board. The buckle and the positioning protrusion are arranged on the outer baffle. The length of the outer baffle is greater than the length of the inner baffle along the motor axis. The outer baffle is arranged in the stator shell along the motor radial direction. The number of the outer baffles and the number of the inner baffles are both at least two. The at least two outer baffles are arranged along the circumference of the mounting portion. The at least two inner baffles are arranged along the circumference of the mounting portion. The at least two outer baffles are arranged opposite to the at least two inner baffles. The buckle and the positioning protrusion are arranged along the circumference of the mounting portion and arranged on the at least two outer baffles. The width of the outer baffle is less than the width of the inner baffle along the circumference of the motor.

14. The electric machine of any one of claims 4 to 13, wherein, The mounting bracket further comprises a winding part connected to the side of the mounting part away from the circuit board, and the winding part is provided with a wire receiving groove; The wire passing groove is communicated with the wire receiving groove, and the stator winding is wound around the wire passing groove and the wire receiving groove.

15. The electric machine of any one of claims 1 to 13, wherein, The motor further comprises: a rotor rotatably arranged inside the stator; and a detection assembly comprising a magnetic induction part and a magnetic part, wherein the magnetic induction part is connected to the circuit board, and the magnetic part is connected to the rotor.

16. The electric machine of claim 15, wherein, The mounting part is provided with a buckle, the circuit board is provided with a clamping groove, the buckle is clamped in the clamping groove, and / or the mounting part is provided with a positioning protrusion, the circuit board is provided with a positioning groove, and the positioning protrusion is clamped in the positioning groove. The magnetic induction part is closer to the central axis of the motor than the clamping groove and / or the positioning groove.

17. An oral care device characterized by, The handle comprises: a handle comprising the motor as claimed in any one of claims 1 to 16; and a care part connected to the motor shaft of the motor. ​

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