Motor module and electric toothbrush

Abstract

The utility model relates to the technical field of oral cavity cleaning tools, and discloses a motor module and an electric toothbrush, the motor module comprises a servo motor, a first flexible circuit board and a reinforcer, the first flexible circuit board is provided with a Hall element, and the Hall element is used for detecting the magnetic field of an induced magnet of the servo motor so as to detect the current position of a rotor of the servo motor; the reinforcer is attached to the side, away from the Hall element, of the first flexible circuit board, at least part of the reinforcer corresponds to the Hall element, and the reinforcer is used for improving the strength of the first flexible circuit board. According to the motor module and the electric toothbrush, the strength of the first flexible circuit board is improved through the reinforcing piece, the situation that the relative positions of the Hall element and the induction magnet deviate due to deformation of the first flexible circuit board is avoided, the Hall element and the induction magnet can be kept parallel, and the service life of the motor module and the electric toothbrush is prolonged. The detection precision of the Hall element is high.

Description

Technical Field

[0001] The utility model relates to the technical field of oral cleaning tools, 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 servo 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 servo motor, a Hall element is usually set on the flexible circuit board, and the Hall element is used to detect the induction magnet of the servo motor to determine the current position of the rotor of the servo motor. However, when the Hall element is welded to the flexible circuit board, the flexible circuit board is deformed due to heat, and the relative position of the Hall element and the induction magnet shifts with the deformation of the flexible circuit board, resulting in the Hall element and the induction magnet being unable to remain parallel, and the detection accuracy of the Hall element is low. Utility Model Content

[0004] The embodiment of the utility model discloses a motor module and an electric toothbrush, which improves the strength of the first flexible circuit board by a reinforcing member to avoid the relative position shift of the Hall element and the induction magnet caused by the deformation of the first flexible circuit board. The Hall element and the induction magnet can remain parallel, and the detection accuracy of the Hall element is relatively high.

[0005] In a first aspect, an embodiment of the utility model discloses a motor module, comprising a servo motor, a first flexible circuit board and a reinforcement member, wherein the first flexible circuit board is provided with a Hall element, and the Hall element is used to detect the magnetic field of the induction magnet of the servo motor to detect the current position of the rotor of the servo motor, and the reinforcement member is attached to the side of the first flexible circuit board away from the Hall element, and the reinforcement member is at least partially arranged corresponding to the Hall element, and the reinforcement member is used to improve the strength of the first flexible circuit board.

[0006] As an optional implementation, in an embodiment of the utility model, the motor module further includes a wiring circuit electrically connected to the servo motor, and the wiring circuit is located on a side of the reinforcement member away from the first flexible circuit board.

[0007] As an optional implementation, in an embodiment of the utility model, the servo motor has a coil winding, and the coil winding has an output terminal, and the output terminal is bent and extended to a soldering point located on a side of the reinforcement away from the first flexible circuit board to be welded to the wiring circuit.

[0008] As an optional implementation, in an embodiment of the utility model, the motor module further includes a magnetic isolation layer, and the magnetic isolation layer is located between the wiring circuit and the Hall element.

[0009] As an optional implementation manner, in an embodiment of the utility model, the magnetic isolation layer includes a copper film and / or a magnetic isolation coating.

[0010] As an optional implementation, in an embodiment of the utility model, the motor module further includes a second flexible circuit board, the second flexible circuit board is attached to a side of the reinforcement member away from the first flexible circuit board, and the second flexible circuit board is provided with a wiring circuit electrically connected to the servo motor;

[0011] Alternatively, the reinforcement member includes a rigid circuit board, and a wiring circuit electrically connected to the servo motor is provided on a side of the rigid circuit board facing away from the first flexible circuit board.

[0012] As an optional implementation, in an embodiment of the utility model, the motor module further includes a first magnetic isolation layer, and the first magnetic isolation layer is arranged between the first flexible circuit board and the reinforcement.

[0013] As an optional implementation, in an embodiment of the utility model, the motor module also includes a second flexible circuit board and a second magnetic isolation layer, the second flexible circuit board is attached to the side of the reinforcement away from the first flexible circuit board, the second flexible circuit board is provided with a wiring circuit electrically connected to the servo motor, and the second magnetic isolation layer is arranged between the reinforcement and the second flexible circuit board.

[0014] As an optional implementation, in an embodiment of the utility model, the motor module also includes a wiring circuit electrically connected to the servo motor, and the wiring circuit is arranged on the first flexible circuit board.

[0015] As an optional implementation, in an embodiment of the utility model, the first flexible circuit board includes a main body and a lead-out portion, the main body is provided with the Hall element, the reinforcement is attached to the side of the main body facing away from the Hall element, the wiring circuit is electrically connected to the main body, the lead-out portion is connected to the main body, and the lead-out portion extends and protrudes from the reinforcement.

[0016] As an optional implementation, in the embodiment of the utility model, the spacing distance between the connection between the lead-out portion and the main body and the Hall element is d1, and d1≥1mm.

[0017] As an optional embodiment, in an embodiment of the utility model, the lead-out portion includes a first extension portion and a second extension portion, the first extension portion is arranged at the edge of the main body portion, and the first extension portion is extended along the main body portion toward the reinforcement, the second extension portion is bent and connected to the first extension portion, and the second extension portion is extended along the main body portion away from the reinforcement.

[0018] As an optional implementation, in the embodiment of the utility model, the projections of the wiring circuit and the Hall element on the first flexible circuit board are arranged at intervals, and the interval distance is d2, d2≥3mm.

[0019] As an optional implementation, in the embodiment of the utility model, the thickness of the reinforcement is t, t≥0.8mm.

[0020] As an optional implementation, in an embodiment of the utility model, the motor module also includes a mounting seat, one side of the mounting seat is arranged on the servo motor, the side of the mounting seat facing away from the servo motor has a support plane, and the side of the first flexible circuit board facing away from the reinforcement is arranged on the support plane.

[0021] As an optional implementation, in an embodiment of the utility model, the first flexible circuit board includes a first part and a second part arranged around the first part, the Hall element is arranged on the first part, the second part abuts against the supporting plane, and the reinforcement is attached to the first part and the second part on a side away from the Hall element;

[0022] The distance from the Hall element to the edge of the second part is d3, and d3≥1 mm.

[0023] As an optional implementation, in an embodiment of the utility model, the motor module also includes a fastener, which passes through the reinforcement and the first flexible circuit board in sequence and is connected to the mounting seat to press the reinforcement and the first flexible circuit board to the mounting seat, and the fastener is used to change the tightness of the reinforcement and the first flexible circuit board pressed to the mounting seat to adjust the relative angle between the Hall element and the servo motor.

[0024] As an optional implementation, in an embodiment of the utility model, the motor module includes two fasteners, and the two fasteners are spaced apart between the reinforcement and the first flexible circuit board. The first flexible circuit board is provided with two Hall elements, and the two Hall elements are symmetrically distributed on both sides of the line connecting the two fasteners.

[0025] As an optional implementation, in the embodiment of the utility model, the material of the mounting seat is hard metal.

[0026] As an optional implementation, in an embodiment of the utility model, the reinforcement member includes a hard circuit board, and the hard circuit board includes a first hard board and a second hard board, the first hard board is provided with a wiring circuit electrically connected to the servo motor, the second hard board is arranged on the side of the first hard board away from the wiring circuit, the second hard board is provided with a first shielding circuit, the first flexible circuit board is arranged on the side of the second hard board away from the first hard board, and the first flexible circuit board is electrically connected to the wiring circuit and the first shielding circuit.

[0027] As an optional implementation, in an embodiment of the utility model, the first flexible circuit board includes a first soft board and a second soft board, the first soft board is arranged on the side of the second hard board away from the first hard board, the first soft board is provided with a first Hall acquisition circuit and a first three-phase circuit, the first Hall acquisition circuit is used to collect the signal of the Hall element, the first three-phase circuit is electrically connected to the wiring circuit, the second soft board is arranged on the side of the first soft board away from the second hard board, the second soft board is provided with a second Hall acquisition circuit, a second three-phase circuit, a ground wire and a power line, two second Hall acquisition circuits are used to collect the signal of the Hall element, the second three-phase circuit is electrically connected to the wiring circuit, the ground wire is electrically connected to the first shielding circuit, and the power line is electrically connected to the Hall element.

[0028] As an optional implementation, in an embodiment of the utility model, the first flexible board is further provided with a second shielding circuit, and the second shielding circuit is electrically connected to the ground wire.

[0029] In the second aspect, an embodiment of the utility model discloses an electric toothbrush, comprising a handle, a brush head and the motor module disclosed in the first aspect, wherein the brush head is arranged on the handle, the motor module is arranged on the handle, and the servo motor is used to drive the brush head to vibrate.

[0030] Compared with the prior art, the embodiments of the present invention have at least the following beneficial effects:

[0031] In the embodiment of the utility model, a Hall element is arranged on the first flexible circuit board, and the Hall element is used to detect the magnetic field of the induction magnet of the servo motor to detect the current position of the rotor of the servo motor. At the same time, a reinforcing member is arranged on the side of the first flexible circuit board away from the Hall element, and at least part of the reinforcing member is arranged corresponding to the Hall element. In this way, the strength of the first flexible circuit board is improved by the reinforcing member, especially the strength of the part of the first flexible circuit board where the Hall element is arranged, so that the relative position of the Hall element and the induction magnet is prevented from shifting due to the deformation of the first flexible circuit board, and the Hall element and the induction magnet can be kept parallel, and the detection accuracy of the Hall element is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 This is a schematic diagram of the structure of a motor module disclosed in Embodiment 1 of the present utility model;

[0034] Figure 2 It is a schematic diagram of the exploded structure of the motor module disclosed in the first embodiment of the utility model;

[0035] Figure 3 It is a structural schematic diagram of the motor module (omitting the servo motor) disclosed in the first embodiment of the utility model;

[0036] Figure 4 This is a schematic diagram of the structure of the first flexible circuit board and the reinforcement member stacked in the first embodiment of the present utility model;

[0037] Figure 5 It is a structural schematic diagram of the first hard board disclosed in the first embodiment of the utility model;

[0038] Figure 6 It is a structural schematic diagram of the second hard board disclosed in the first embodiment of the utility model;

[0039] Figure 7 It is a structural schematic diagram of the first flexible board disclosed in the first embodiment of the utility model;

[0040] Figure 8 It is a structural schematic diagram of the second flexible board disclosed in the first embodiment of the utility model;

[0041] Fig. 9 yes Figure 4 A schematic structural diagram of another perspective of stacking the first flexible circuit board and the reinforcement member disclosed in the disclosure;

[0042] Fig.10 It is a cross-sectional structural schematic diagram of the motor module (omitting the servo motor) disclosed in the first embodiment of the utility model;

[0043] Fig.11 This is a schematic diagram of the structure of an electric toothbrush disclosed in Embodiment 2 of the present utility model;

[0044] Fig.12 It is a schematic diagram of the exploded structure of an electric toothbrush disclosed in Embodiment 2 of the present utility model.

[0045] Description of main reference numerals

[0046] 100, motor module; 10, servo motor; 11, outlet terminal; 20, first flexible circuit board; 20a, first part; 20b, second part; 21, main body; 22, lead-out part; 22a, first extension part; 22b, second extension part; 30, reinforcement; 31, first hard board; 32, second hard board; 32a, first shielding circuit; 33, first soft board; 33a, first Hall acquisition circuit; 33b, first three-phase circuit; 33c, second shielding circuit; 34, second soft board; 34a, second Hall acquisition circuit; 34b, second three-phase circuit; 34c, ground wire; 34d, power line; 40, Hall element; 50, wiring circuit; 60, second flexible circuit board; 71, first magnetic isolation layer; 72, second magnetic isolation layer; 80, mounting seat; 81, supporting plane; 90, fastener; 200, electric toothbrush; 201, handle. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] The utility model discloses a motor module and an electric toothbrush. The strength of a first flexible circuit board is improved by a reinforcing member, so as to avoid the relative position shift of a Hall element and an induction magnet caused by deformation of the first flexible circuit board. The Hall element and the induction magnet can remain parallel, and the detection accuracy of the Hall element is high.

[0053] Embodiment 1

[0054] Please also read Figures 1 to 3 , is a structural schematic diagram of a motor module 100 provided in a first embodiment of the utility model, the motor module 100 includes a servo motor 10, a first flexible circuit board 20 and a reinforcement member 30, the first flexible circuit board 20 is provided with a Hall element 40, the Hall element 40 is used to detect the magnetic field of the induction magnet of the servo motor 10, so as to detect the current position of the rotor of the servo motor 10, the reinforcement member 30 is attached to the side of the first flexible circuit board 20 away from the Hall element 40, and the reinforcement member 30 is at least partially arranged corresponding to the Hall element 40, and the reinforcement member 30 is used to improve the strength of the first flexible circuit board 20.

[0055] In this embodiment, the Hall element 40 is provided on the first flexible circuit board 20, and the Hall element 40 is used to detect the magnetic field of the induction magnet of the servo motor 10, so as to detect the current position of the rotor of the servo motor 10. At the same time, by providing a reinforcing member 30 on the side of the first flexible circuit board 20 away from the Hall element 40, and the reinforcing member 30 is at least partially provided corresponding to the Hall element 40, so that the strength of the first flexible circuit board 20 is improved by the reinforcing member 30, especially the strength of the part of the first flexible circuit board 20 provided with the Hall element 40, it is possible to avoid the relative position of the Hall element 40 and the induction magnet from being offset due to the deformation of the first flexible circuit board 20, the Hall element 40 and the induction magnet can be kept parallel, and the detection accuracy of the Hall element 40 is high.

[0056] In addition, the first flexible circuit board 20 is reinforced by the reinforcement member 30. When the first flexible circuit board 20 is installed on the servo motor 10, the reinforcement member 30 can flatten the first flexible circuit board 20 and be installed on the servo motor 10 together with the first flexible circuit board 20. There is no need to introduce additional intermediate parts to achieve the installation of the first flexible circuit board 20 and the servo motor 10, which reduces the overall size and improves the installation accuracy of the Hall element 40.

[0057] Preferably, if Figure 2 and Figure 3 As shown, the shape and size of the reinforcing member 30 match those of the first flexible circuit board 20 . The reinforcing member 30 can integrally reinforce various parts of the first flexible circuit board 20 , and the overall strength of the first flexible circuit board 20 is relatively high.

[0058] In some embodiments, Figure 1 and Figure 2 As shown, the motor module 100 further includes a wiring circuit 50 electrically connected to the servo motor 10, and the wiring circuit 50 is located on the side of the reinforcement 30 away from the first flexible circuit board 20. In this way, by locating the wiring circuit 50 on the side of the reinforcement 30 away from the first flexible circuit board 20, the wiring circuit 50 and the Hall element 40 are located on different sides of the reinforcement 30, and the electromagnetic interference generated when the wiring circuit 50 and the servo motor 10 are connected has little effect on the Hall element 40, thereby ensuring the detection accuracy of the Hall element 40.

[0059] For example, Figure 2 and Figure 3As shown, the servo motor 10 has a coil winding (not shown), and the coil winding has an outlet terminal 11, and the outlet terminal 11 is bent and extended to a soldering point located on a side of the reinforcement member 30 away from the first flexible circuit board 20, so as to be soldered to the wiring circuit 50. In this way, the outlet terminal 11 of the coil winding is bent and extended to the side of the reinforcement member 30 away from the first flexible circuit board 20, and the outlet terminal 11 can be soldered to the wiring circuit 50 at the soldering point, so as to achieve electrical conduction between the outlet terminal 11 and the wiring circuit 50, and the soldering position (i.e., soldering point) of the outlet terminal 11 and the wiring circuit 50 is located on a different side of the reinforcement member 30 from the Hall element 40, so as to avoid the soldering point formed by the soldering and the heat generated by the soldering from causing the first flexible circuit board 20 to deform, resulting in the relative position of the Hall element 40 and the induction magnet to shift, and the Hall element 40 and the induction magnet can be kept parallel, and the detection accuracy of the Hall element 40 is high.

[0060] In order to arrange the wiring circuit 50 on the side of the reinforcement member 30 away from the first flexible circuit board 20, the present embodiment adopts the circuit board as the carrier of the wiring circuit 50, and the specific method may include:

[0061] As an optional implementation, Figure 4 As shown, the motor module 100 further includes a second flexible circuit board 60, which is attached to the side of the reinforcement member 30 away from the first flexible circuit board 20, and the second flexible circuit board 60 is provided with a wiring line 50 electrically connected to the servo motor 10. In this way, by arranging the second flexible circuit board 60 on the side of the reinforcement member 30 away from the first flexible circuit board 20, and using the second flexible circuit board 60 to arrange the wiring line 50, the wiring line 50 can be electrically connected to the outlet terminal 11 of the servo motor 10, and the reinforcement member 30 can simultaneously improve the strength of the first flexible circuit board 20 and the second flexible circuit board 60.

[0062] As another optional implementation, Figure 3 As shown, the reinforcement member 30 includes a rigid circuit board, and a wiring line 50 electrically connected to the servo motor 10 is provided on the side of the rigid circuit board away from the first flexible circuit board 20. In this way, on the one hand, the wiring line 50 is provided by the rigid circuit board, and the wiring line 50 can be electrically connected to the outlet terminal 11 of the servo motor 10. On the other hand, the rigid circuit board is used to reinforce the first flexible circuit board 20, and no other reinforcement structure is required to be provided, and the rigid circuit board is used to achieve structural reuse.

[0063] Exemplarily, when a first flexible circuit board 20 and a hard circuit board are used, the two can be combined as a hard-soft board, and specifically can include a first hard board 31, a second hard board 32, a first soft board 33 and a second soft board 34 stacked in sequence.

[0064] like Figure 5As shown, the first hard board 31 is provided with a wiring circuit 50 , and the wiring circuit 50 is electrically connected to the output terminal 11 of the servo motor 10 .

[0065] like Figure 6 As shown, the second hard board 32 is provided with a first shielding circuit 32 a, and the first shielding circuit 32 a is used to shield the electromagnetic interference generated by the wiring circuit 50 to avoid affecting the Hall element 40.

[0066] like Figure 7 As shown, the first flexible board 33 is provided with two first Hall acquisition circuits 33a, a first three-phase circuit 33b, and a second shielding circuit 33c.

[0067] like Figure 8 As shown, the second flexible board 34 is provided with two second Hall acquisition circuits 34 a , a second three-phase circuit 34 b , a ground line 34 c , and a power line 34 d , and the second flexible board 34 is provided with a Hall element 40 .

[0068] Among them, the first three-phase line 33b and the second three-phase line 34b are both electrically connected to the wiring line 50, have strong overcurrent capacity, and are suitable for the servo motor 10 with higher power in this embodiment. Similarly, the first Hall acquisition line 33a and the second Hall acquisition line 34a are used to simultaneously collect signals of two Hall elements 40, and the overcurrent capacity is strong and the signal acquisition accuracy is high. The first shielding line 32a and the second shielding line 33c are connected through the ground wire 34c, and the first shielding line 32a and the second shielding line 33c are grounded, so that the first shielding line 32a and the second shielding line 33c can block the electromagnetic interference generated by the wiring line 50, thereby improving the detection accuracy of the Hall element 40. The power line 34d is electrically connected to the Hall element 40, and the power line 34d is used to power the Hall element.

[0069] In order to further reduce the influence of electromagnetic interference generated when the wiring circuit 50 and the servo motor 10 are turned on the Hall element 40, the motor module 100 of this embodiment further includes a magnetic isolation layer, which is located between the wiring circuit 50 and the Hall element 40. In this way, the magnetic isolation effect of the magnetic isolation layer can be used to block electromagnetic interference and reduce the influence of electromagnetic interference on the Hall element 40.

[0070] Optionally, the magnetic isolation layer includes a copper film and / or a magnetic isolation coating. Thus, different magnetic isolation layers can be selected according to actual conditions, and this embodiment does not specifically limit this.

[0071] Exemplarily, the motor module 100 further includes a first magnetic isolation layer 71, which is disposed between the first flexible circuit board 20 and the reinforcement member 30. In this way, the first magnetic isolation layer 71 between the first flexible circuit board 20 and the reinforcement member 30 can separate the Hall element 40 and the wiring circuit 50 on both sides of the first magnetic isolation layer 71, thereby utilizing the magnetic isolation effect of the first magnetic isolation layer 71 to block the electromagnetic interference generated by the wiring circuit 50, thereby reducing the influence of the electromagnetic interference on the Hall element 40.

[0072] In this embodiment, the second flexible circuit board 60 is attached to the side of the reinforcement member 30 away from the first flexible circuit board 20 as an example, and the motor module 100 further includes a second magnetic isolation layer 72, and the second magnetic isolation layer 72 is arranged between the reinforcement member 30 and the second flexible circuit board 60. In this way, the second magnetic isolation layer 72 located between the second flexible circuit board 60 and the reinforcement member 30 can separate the Hall element 40 and the wiring circuit 50 on both sides of the second magnetic isolation layer 72, so as to utilize the magnetic isolation effect of the second magnetic isolation layer 72 to block the electromagnetic interference generated by the wiring circuit 50, and reduce the influence of the electromagnetic interference on the Hall element 40.

[0073] That is, this embodiment can double-block the electromagnetic interference generated by the wiring circuit 50 through the first magnetic isolation layer 71 and the second magnetic isolation layer 72 , thereby minimizing the influence of the electromagnetic interference on the Hall element 40 and improving the detection accuracy of the Hall element 40 .

[0074] In some embodiments, Fig. 9 As shown, the projection interval between the wiring circuit 50 and the Hall element 40 on the first flexible circuit board 20 is set, and the interval distance is d2, d2 ≥ 3mm. In this way, by setting the interval distance d2 to a larger size of d2 ≥ 3mm, the distance between the wiring circuit 50 and the Hall element 40 in the horizontal direction (the plane where the reinforcement 30 is located) is relatively far, which can reduce the influence of the electromagnetic interference generated when the wiring circuit 50 and the servo motor 10 are turned on to the Hall element 40, and improve the detection accuracy of the Hall element 40. The interval distance d2 can be 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4mm, 4.2mm, etc., which is not specifically limited in this embodiment.

[0075] For example, Figure 4As shown, the thickness of the reinforcement 30 is t, t≥0.8mm. In this way, by setting the thickness t of the reinforcement 30 to a larger size of t≥0.8mm, the distance between the wiring circuit 50 and the Hall element 40 in the vertical direction (the thickness direction of the reinforcement 30) is relatively far, which can reduce the influence of the electromagnetic interference generated when the wiring circuit 50 and the servo motor 10 are turned on to the Hall element 40, and improve the detection accuracy of the Hall element 40. In addition, the thickness t of the reinforcement 30 is relatively large, which can improve the reinforcement effect of the reinforcement 30 on the first flexible circuit board 20 and the second flexible circuit board 60, and the overall structural strength of the motor module 100 is relatively high. And the thickness t of the reinforcement 30 can be 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc., which is not specifically limited in this embodiment.

[0076] That is, this embodiment reduces the influence of electromagnetic interference generated when the wiring circuit 50 and the servo motor 10 are turned on the Hall element 40 by setting a magnetic isolation layer and controlling the distance between the Hall element 40 and the wiring circuit 50, so that the detection accuracy of the Hall element 40 is better.

[0077] In some other embodiments, the motor module 100 further includes a wiring circuit 50 electrically connected to the servo motor 10, and the wiring circuit 50 is disposed on the first flexible circuit board 20. In this way, by arranging the Hall element 40 and the wiring circuit 50 on the first flexible circuit board 20, the wiring of the motor module 100 can be simplified and the overall volume can be reduced.

[0078] In some embodiments, Figure 3 As shown, the first flexible circuit board 20 includes a main body 21 and a lead-out portion 22, the main body 21 is provided with a Hall element 40, a reinforcement member 30 is attached to the side of the main body 21 away from the Hall element 40, a wiring circuit 50 is electrically connected to the main body 21, and the lead-out portion 22 is connected to the main body 21, and the lead-out portion 22 extends and protrudes from the reinforcement member 30. In this way, the Hall element 40 is arranged on the main body 21, the wiring circuit 50 is electrically connected to the main body 21, and the lead-out portion 22 can realize the Hall element 40 and the wiring circuit 50 being jointly led out and used for electrical connection with the electric toothbrush, thereby simplifying the wiring of the motor module 100.

[0079] Exemplarily, the lead-out portion 22 includes a first extension portion 22a and a second extension portion 22b, the first extension portion 22a is arranged at the edge of the main body portion 21, and the first extension portion 22a is extended along the main body portion 21 toward the reinforcement 30, the second extension portion 22b is bent and connected to the first extension portion 22a, and the second extension portion 22b is extended along the main body portion 21 in a direction away from the reinforcement 30. In this way, the first extension portion 22a is extended along the direction of the main body 21 toward the reinforcement 30, and the shear force generated at the connection between the first extension portion 22a and the main body 21 is toward the reinforcement 30. The bending force will not cause the first extension portion 22a to drive the main body 21 to be torn from the reinforcement 30, but can make the main body 21 pressed against the reinforcement 30. The second extension portion 22b is extended along the direction of the main body 21 away from the reinforcement 30. The shear force generated at the connection between the second extension portion 22b and the first extension portion 22a is far away from the main body 21, and has less impact on the main body 21, resulting in a lower risk of the main body 21 being torn from the reinforcement 30.

[0080] Alternatively, if Figure 4 As shown, the spacing distance between the connection between the lead-out portion 22 and the main body 21 and the Hall element 40 is d1, and d1≥1mm. In this way, considering that the lead-out portion 22 is used for electrical connection with the electric toothbrush, it is usually necessary to bend and extend it, especially to bend at the connection between the lead-out portion 22 and the main body, if the spacing distance d1 between the connection between the lead-out portion 22 and the main body 21 and the Hall element 40 is less than 1mm, then the spacing distance d1 is small, and when the above connection is bent, the main body 21 undergoes a slight deformation, and this deformation will cause the relative position of the Hall element 40 and the induction magnet to shift. Therefore, the spacing distance d1 between the connection between the lead-out portion 22 and the main body 21 and the Hall element 40 can be d1≥1mm, which can avoid the main body 21 from slightly deforming as the lead-out portion 22 is bent and extended, resulting in the relative position of the Hall element 40 and the induction magnet shifting, and the Hall element 40 and the induction magnet can remain parallel, and the detection accuracy of the Hall element 40 is high. The spacing distance d1 between the connection between the lead-out portion 22 and the main body 21 and the Hall element 40 may be 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, etc., which is not specifically limited in this embodiment.

[0081] In some embodiments, refer again to Figure 1 and Figure 2The motor module 100 further includes a mounting seat 80, one side of which is arranged on the servo motor 10, and a side of the mounting seat 80 which is away from the servo motor 10 has a support plane 81, and a side of the first flexible circuit board 20 which is away from the reinforcement 30 is arranged on the support plane 81. In this way, on the one hand, by arranging the mounting seat 80 on the servo motor 10 and using the support plane 81 of the mounting seat 80 to set the first flexible circuit board 20, the servo motor 10 is connected with the first flexible circuit board 20 and the reinforcement 30 to form an integral structure, thereby realizing the assembly of the motor module 100. On the other hand, after the first flexible circuit board 20 is arranged on the support plane 81, the flatness of the support plane 81 is high, so that the influence of the installation error on the Hall element 40 can be reduced, so that the Hall element 40 can be kept parallel to the induction magnet, and the detection accuracy of the Hall element 40 is high.

[0082] Exemplarily, the mounting base 80 is made of hard metal. In this way, the mounting base 80 has a high strength, and when the first flexible circuit board 20 and the reinforcement member 30 are mounted on the mounting base 80, the force exerted on the mounting base 80 will not cause the mounting base 80 to deform, which can avoid the situation where the Hall element 40 and the induction magnet cannot maintain parallelism, thereby ensuring the detection accuracy of the Hall element 40.

[0083] In some other embodiments, the mounting base 80 may also be made of hard plastic or other materials with high strength to prevent deformation due to force, which may cause the Hall element 40 to be unable to remain parallel to the sensing magnet. This embodiment does not make any specific limitation to this.

[0084] In some embodiments, Fig.10 As shown, the first flexible circuit board 20 includes a first part 20a and a second part 20b arranged around the first part 20a, the Hall element 40 is arranged on the first part 20a, the second part 20b is abutted against the support plane 81, the reinforcing member 30 is attached to the first part 20a and the second part 20b on the side away from the Hall element 40, and the distance from the Hall element 40 to the edge of the second part 20b is d3, d3 ≥ 1mm. In this way, by the abutment of the second part 20b with the support plane 81, the second part 20b and the support plane 81 are squeezed against each other and easily deformed, and the deformation of the second part 20b has little effect on the first part 20a, and the Hall element 40 is arranged on the first part 20a, and the distance d3 from the position of the Hall element 40 to the edge of the second part 20b is ≥ 1mm, which is relatively far away from the second part 20b, which can reduce the influence of the deformation of the second part 20b on the position of the Hall element 40, and avoid the situation that the Hall element 40 and the induction magnet cannot be kept parallel. Furthermore, the distance d3 from the Hall element 40 to the edge of the second portion 20 b may be 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.4 mm, etc., which is not specifically limited in this embodiment.

[0085] In some embodiments, the motor module 100 further includes a fastener 90, which passes through the reinforcement member 30 and the first flexible circuit board 20 in sequence and is connected to the mounting seat 80 to press the reinforcement member 30 and the first flexible circuit board 20 to the mounting seat 80. The fastener 90 is used to change the tightness of the reinforcement member 30 and the first flexible circuit board 20 pressed to the mounting seat 80 to adjust the relative angle between the Hall element 40 and the servo motor 10. In this way, the reinforcement member 30 and the first flexible circuit board 20 are pressed to the mounting seat 80 by the fastener 90, and the first flexible circuit board 20 can be deformed by the force applied to it. The fastener 90 can increase or decrease the tightness, change the thickness of the first flexible circuit board 20 corresponding to the position of the fastener 90, so that the first flexible circuit board 20 and the reinforcement member 30 are tilted as a whole, and then the relative angle between the Hall element 40 and the servo motor 10 is adjusted, so that the Hall element 40 can be kept parallel to the induction magnet.

[0086] For example, when the second flexible circuit board 60 is provided on the side of the reinforcement 30 away from the first flexible circuit board 20, the fastener 90 also penetrates the second flexible circuit board 60, and presses the second flexible circuit board 60, the reinforcement 30 and the first flexible circuit board 20 together to the mounting seat 80. In this way, the second flexible circuit board 60 can be deformed by the force, and the thickness of the second flexible circuit board 60 corresponding to the position of the fastener 90 is changed. The fastener 90 has better operability to adjust the relative angle between the Hall element 40 and the servo motor 10 by changing the tightness, and the adjustment range is wider.

[0087] Optionally, the fastener 90 may be a bolt, a screw, etc., which is not specifically limited in this embodiment.

[0088] Exemplarily, the motor module 100 includes two fasteners 90, which are spaced apart between the reinforcement 30 and the first flexible circuit board 20. The first flexible circuit board 20 is provided with two Hall elements 40, which are symmetrically distributed on both sides of the line connecting the two fasteners 90. In this way, when the two fasteners 90 press the first flexible circuit board 20 and the reinforcement 30 against the mounting seat 80, the force exerted on the first flexible circuit board 20 causes the position of the first flexible circuit board 20 corresponding to the fasteners 90 to deform. By symmetrically distributing the two Hall elements 40 on both sides of the line connecting the two fasteners 90, the deformation of the position of the first flexible circuit board 20 corresponding to the two fasteners 90 has the same effect on the two Hall elements 40, which can reduce the influence on the relative angle between the Hall element 40 and the servo motor 10.

[0089] The first embodiment of the utility model provides a motor module 100, in which a Hall element 40 is arranged on a first flexible circuit board 20, and the Hall element 40 is used to detect the magnetic field of the induction magnet of the servo motor 10, so as to detect the current position of the rotor of the servo motor 10. At the same time, by arranging a reinforcing member 30 on the side of the first flexible circuit board 20 away from the Hall element 40, and at least a part of the reinforcing member 30 is arranged corresponding to the Hall element 40, the reinforcing member 30 is used to improve the strength of the first flexible circuit board 20, especially to improve the strength of the part of the first flexible circuit board 20 where the Hall element 40 is arranged, so that the relative position of the Hall element 40 and the induction magnet is prevented from shifting due to the deformation of the first flexible circuit board 20, the Hall element 40 and the induction magnet can be kept parallel, and the detection accuracy of the Hall element 40 is high.

[0090] Embodiment 2

[0091] Please also read Fig.11 and Fig.12 , is a schematic diagram of the structure of an electric toothbrush 200 provided in Embodiment 2 of the present invention, the electric toothbrush 200 comprises a handle 201, a brush head (not shown) and the motor module 100 of Embodiment 1, the brush head is arranged on the handle 201, the motor module 100 is arranged on the handle, and the servo motor is used to drive the brush head to vibrate.

[0092] The second embodiment of the present invention provides an electric toothbrush 200, in which the Hall element and the induction magnet can be kept parallel, and the detection accuracy of the Hall element is relatively high.

[0093] 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: Servo motor; A first flexible circuit board, wherein the first flexible circuit board is provided with a Hall element, and the Hall element is used to detect the magnetic field of the induction magnet of the servo motor to detect the current position of the rotor of the servo motor; as well as A reinforcing member, wherein the reinforcing member is attached to a side of the first flexible circuit board away from the Hall element, and the reinforcing member is at least partially arranged corresponding to the Hall element, and the reinforcing member is used to improve the strength of the first flexible circuit board.

2. The motor module according to claim 1, characterized in that: The motor module further includes a wiring circuit electrically connected to the servo motor, and the wiring circuit is located on a side of the reinforcement member away from the first flexible circuit board.

3. The motor module according to claim 2, characterized in that: The servo motor has a coil winding, and the coil winding has an outlet terminal. The outlet terminal is bent and extended to a welding point located on a side of the reinforcement away from the first flexible circuit board to be welded with the wiring line.

4. The motor module according to claim 2, characterized in that: The motor module also includes a magnetic isolation layer, and the magnetic isolation layer is located between the wiring line and the Hall element.

5. The motor module according to claim 4, characterized in that: The magnetic isolation layer includes a copper film and / or a magnetic isolation coating.

6. The motor module according to claim 1, characterized in that: The motor module further includes a second flexible circuit board, which is attached to a side of the reinforcement member away from the first flexible circuit board, and the second flexible circuit board is provided with a wiring circuit electrically connected to the servo motor; Alternatively, the reinforcement member includes a rigid circuit board, and a wiring circuit electrically connected to the servo motor is provided on a side of the rigid circuit board facing away from the first flexible circuit board.

7. The motor module according to claim 6, characterized in that: The motor module further includes a first magnetic isolation layer, which is arranged between the first flexible circuit board and the reinforcement.

8. The motor module according to claim 1, characterized in that: The motor module also includes a second flexible circuit board and a second magnetic isolation layer. The second flexible circuit board is attached to a side of the reinforcement member facing away from the first flexible circuit board. The second flexible circuit board is provided with a wiring circuit electrically connected to the servo motor. The second magnetic isolation layer is arranged between the reinforcement member and the second flexible circuit board.

9. The motor module according to claim 1, characterized in that: The motor module also includes a wiring circuit electrically connected to the servo motor, and the wiring circuit is arranged on the first flexible circuit board.

10. The motor module according to any one of claims 2 to 9, characterized in that: The first flexible circuit board includes a main body and a lead-out part, the main body is provided with the Hall element, the reinforcement is attached to the side of the main body facing away from the Hall element, the wiring line is electrically connected to the main body, the lead-out part is connected to the main body, and the lead-out part extends and protrudes from the reinforcement.

11. The motor module according to claim 10, characterized in that: The spacing distance between the connection point between the lead-out portion and the main body portion and the Hall element is d1, and d1≥1mm.

12. The motor module according to claim 10, characterized in that: The lead-out portion includes a first extension portion and a second extension portion, wherein the first extension portion is arranged at the edge of the main body portion and extends along the main body portion toward the reinforcement member, and the second extension portion is bent and connected to the first extension portion and extends along the main body portion away from the reinforcement member.

13. The motor module according to any one of claims 2 to 9, characterized in that: The projections of the wiring circuit and the Hall element on the first flexible circuit board are arranged at intervals, and the interval distance is d2, d2≥3mm.

14. The motor module according to any one of claims 1 to 9, characterized in that: The thickness of the reinforcement is t, t≥0.8 mm.

15. The motor module according to any one of claims 1 to 9, characterized in that: The motor module also includes a mounting seat, one side of the mounting seat is arranged on the servo motor, the side of the mounting seat facing away from the servo motor has a supporting plane, and the side of the first flexible circuit board facing away from the reinforcement is arranged on the supporting plane.

16. The motor module according to claim 15, characterized in that: The first flexible circuit board includes a first part and a second part arranged around the first part, the Hall element is arranged on the first part, the second part is abutted against the supporting plane, and the reinforcing member is attached to a side of the first part and the second part away from the Hall element; The distance from the Hall element to the edge of the second part is d3, and d3≥1 mm.

17. The motor module according to claim 15, characterized in that: The motor module also includes a fastener, which passes through the reinforcement and the first flexible circuit board in sequence and is connected to the mounting seat to press the reinforcement and the first flexible circuit board against the mounting seat. The fastener is used to change the tightness of the reinforcement and the first flexible circuit board pressed against the mounting seat to adjust the relative angle between the Hall element and the servo motor.

18. The motor module according to claim 17, characterized in that: The motor module includes two fasteners, which are spaced apart between the reinforcement and the first flexible circuit board. The first flexible circuit board is provided with two Hall elements, which are symmetrically distributed on both sides of the line connecting the two fasteners.

19. The motor module according to claim 15, characterized in that: The material of the mounting seat is hard metal.

20. The motor module according to claim 1, characterized in that: The reinforcement member includes a hard circuit board, and the hard circuit board includes a first hard board and a second hard board, the first hard board is provided with a wiring circuit electrically connected to the servo motor, the second hard board is arranged on a side of the first hard board away from the wiring circuit, the second hard board is provided with a first shielding circuit, the first flexible circuit board is arranged on a side of the second hard board away from the first hard board, and the first flexible circuit board is electrically connected to the wiring circuit and the first shielding circuit.

21. The motor module according to claim 20, characterized in that: The first flexible circuit board includes a first soft board and a second soft board, the first soft board is arranged on the side of the second hard board away from the first hard board, the first soft board is provided with a first Hall acquisition circuit and a first three-phase circuit, the first Hall acquisition circuit is used to collect the signal of the Hall element, the first three-phase circuit is electrically connected to the wiring circuit, the second soft board is arranged on the side of the first soft board away from the second hard board, the second soft board is provided with a second Hall acquisition circuit, a second three-phase circuit, a ground wire and a power line, the second Hall acquisition circuit is used to collect the signal of the Hall element, the second three-phase circuit is electrically connected to the wiring circuit, the ground wire is electrically connected to the first shielding circuit, and the power line is electrically connected to the Hall element.

22. The motor module according to claim 21, characterized in that: The first flexible board is also provided with a second shielding circuit, and the second shielding circuit is electrically connected to the ground wire.

23. An electric toothbrush, characterized in that: It comprises a handle, a brush head and a motor module as described in any one of claims 1 to 22, wherein the brush head is arranged on the handle, the motor module is arranged on the handle, and the servo motor is used to drive the brush head to vibrate.

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