Vibration electric motor assembly and electronic device

Abstract

Provided in the present invention are a vibration electric motor assembly and an electronic device. The vibration electric motor assembly comprises two horizontally-arranged vibration electric motors. Each vibration electric motor comprises a stator, an eccentric rotor and a limiting member, wherein the stator comprises a coil assembly, the coil assembly forming a cavity; the eccentric rotor comprises a rotating shaft and an eccentric wheel sleeved on the rotating shaft, the eccentric wheel comprising a magnetic assembly, and being arranged in the cavity and being capable of rotating in the cavity; and the limiting member is configured to limit the angle of rotation of the eccentric wheel. The vibration electric motor assembly is provided with two horizontal vibration electric motors, wherein each vibration electric motor comprises an eccentric rotor, the eccentric rotor comprises an eccentric wheel, and the eccentric wheel comprises a magnetic assembly, and is arranged in the cavity and can rotate in the cavity. Acceleration generated when the two eccentric rotors rotate and are braked upon coming into contact with the limiting members is asymmetrically distributed, and thus asymmetric vibration is generated when the vibration electric motor assembly operates.

Description

Vibration motor components and electronic equipment Technical Field

[0001] The present invention relates to the technical field of vibration motor components, and in particular to a vibration motor component and electronic equipment. Background Art

[0002] Vibration motors are widely used in various industries. They are devices that convert electrical energy into mechanical energy. Most existing vibration motors are linear motor rotors. When they reciprocate near the equilibrium position, the vibration generated is symmetrically distributed and cannot produce asymmetric vibration (anisotropic vibration).

[0003] In view of this, it is necessary to provide a new vibration motor assembly and electronic equipment to solve or at least alleviate the above technical defects.

[0004] Summary of the Invention

[0005] The main purpose of the present invention is to provide a vibration motor assembly and an electronic device, aiming to solve the technical problem that the motor in the prior art cannot provide anisotropic vibration.

[0006] To achieve the above object, according to one aspect of the present invention, the present invention provides a vibration motor assembly, comprising two horizontally arranged vibration motors, each of the vibration motors comprising:

[0007] a stator, the stator including a coil assembly, the coil assembly forming a cavity;

[0008] an eccentric mover, the eccentric mover comprising a rotating shaft and an eccentric wheel mounted on the rotating shaft, the eccentric wheel comprising a magnetic component, the eccentric wheel being disposed in the cavity and being capable of rotating in the cavity;

[0009] A limiting member is used to limit the rotation angle of the eccentric wheel.

[0010] In one embodiment, the eccentric wheel is formed with a notch, and the limiting member is arranged at the notch.

[0011] In one embodiment, the limiting member is an arc segment, the notch is a fan-shaped notch, the center of the limiting member, the center of the fan-shaped notch, and the center of the rotating shaft are concentrically arranged, and the difference between the first central angle corresponding to the fan-shaped notch and the second central angle corresponding to the limiting member is 90°.

[0012] In one embodiment, the eccentric wheel rotates at an angle ranging from 0° to 90°; the two vibration motors rotate in opposite directions, and the two vibration motors collide with the two corresponding limit members simultaneously.

[0013] In one embodiment, a perpendicular midline of a line connecting the centers of the two rotating shafts is used as a symmetry line, and the two limiting members are arranged in a mirror image relative to the symmetry line.

[0014] In one embodiment, the magnetic assembly includes a magnetic conductive member and a permanent magnet. The magnetic conductive member is mounted on the rotating shaft, and the permanent magnet is unevenly distributed along the outer circumference of the magnetic conductive member.

[0015] In one embodiment, the magnetic assembly includes a magnetic conductive member, a permanent magnet, and a mass block. The magnetic conductive member is sleeved on the rotating shaft, and the permanent magnet and the mass block are arranged on the periphery of the magnetic conductive member.

[0016] In one embodiment, the permanent magnet includes two sub-magnets, which are evenly spaced along the periphery of the magnetic conductive member. The two sub-magnets are formed with two mounting grooves. The number of the mass block is one, and the mass block is arranged in one of the mounting grooves.

[0017] In one embodiment, the limiting member includes a limiting block and a buffer member, and the buffer member is provided on the abutting surface of the limiting block for abutting against the eccentric wheel.

[0018] According to another aspect of the present invention, the present invention further provides an electronic device, comprising a housing and the vibration motor assembly as described above disposed in the housing.

[0019] In the above scheme, the vibration motor assembly includes two horizontally arranged vibration motors, each vibration motor includes a stator, an eccentric mover and a limiter, the stator includes a coil assembly, and the coil assembly forms a cavity; the eccentric mover includes a rotating shaft and an eccentric wheel mounted on the rotating shaft, the eccentric wheel includes a magnetic assembly, the eccentric wheel is arranged in the cavity and can rotate in the cavity; the limiter is used to limit the rotation angle of the eccentric wheel. This invention sets two horizontal vibration motors, the vibration motors include eccentric movers, the eccentric movers include eccentric wheels, and the eccentric wheels include magnetic components. The accelerations generated by the two eccentric movers during rotation and when they encounter the limiter for braking are asymmetrically distributed, resulting in asymmetric vibrations when the vibration motor assembly is in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] FIG1 is a schematic structural diagram of a vibration motor assembly according to an embodiment of the present invention;

[0022] FIG2 is a schematic structural diagram of a vibration motor assembly according to an embodiment of the present invention (with the coil assembly hidden);

[0023] FIG3 is a schematic structural diagram of a vibration motor according to an embodiment of the present invention;

[0024] FIG4 is a schematic diagram of the rotation of a vibration motor assembly according to an embodiment of the present invention;

[0025] FIG5 is a schematic diagram of the force on the vibration motor assembly in the state of FIG4;

[0026] FIG6 is a schematic diagram of braking a vibration motor assembly according to an embodiment of the present invention;

[0027] FIG7 is a schematic diagram of the force on the vibration motor assembly in the state of FIG6;

[0028] FIG8 is a schematic diagram of a vibration motor assembly rotating in reverse according to an embodiment of the present invention;

[0029] FIG9 is a schematic diagram of the force on the vibration motor assembly in the state of FIG8;

[0030] FIG10 is a schematic diagram of reverse braking of a vibration motor assembly according to an embodiment of the present invention;

[0031] FIG11 is a schematic diagram of the force on the vibration motor assembly in the state of FIG10;

[0032] 12 is a waveform diagram of an input voltage signal and an acceleration signal when the vibration motor assembly rotates according to an embodiment of the present invention;

[0033] FIG13 is a schematic diagram of the exploded structure of a vibration motor according to an embodiment of the present invention;

[0034] FIG14 is a structural diagram of a stator and an eccentric mover of a vibration motor according to an embodiment of the present invention;

[0035] FIG15 is a schematic structural diagram of a magnetic conductive ring and an eccentric mover of a vibration motor according to an embodiment of the present invention;

[0036] FIG16 is a schematic structural diagram of an eccentric mover of a vibration motor according to an embodiment of the present invention;

[0037] FIG17 is another structural diagram of the stator and eccentric mover of the vibration motor according to an embodiment of the present invention;

[0038] FIG18 is a schematic cross-sectional view of the vibration motor according to an embodiment of the present invention.

[0039] Explanation of reference numerals: 100, vibration motor assembly; 10, vibration motor; 1, eccentric mover; 11, eccentric wheel; 112, magnetic assembly; 1121, permanent magnet; 11211, sub-magnet; 1122, mass block; 1123, magnetic member; 113, gap; 12, rotating shaft; 2, stator; 21, coil; 22, magnetic ring; 3, upper shell; 31, upper through hole; 4, lower shell; 41, lower through hole; 5, limit member.

[0040] The realization of the objectives, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0042] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.

[0044] Moreover, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] 1 , 2 and 13 to 15 , according to one aspect of the present invention, a vibration motor assembly 100 is provided, comprising two horizontally arranged vibration motors 10, each vibration motor 10 comprising a stator 2, an eccentric mover 1 and a limiter 5, the stator 2 comprising a coil 21 assembly, the coil 21 assembly forming a cavity; the eccentric mover 1 comprising a rotating shaft 12 and an eccentric wheel 11, the eccentric wheel 11 forming a notch 113, the eccentric wheel 11 comprising an eccentric wheel 11 fitted on the rotating shaft 12, the eccentric wheel 11 comprising a magnetic assembly 112, the eccentric wheel 11 being arranged in the cavity and being capable of rotating in the cavity; the limiter 5 is used to limit the rotation angle of the eccentric wheel 11.

[0046] The vibration motor 10 first magnetizes the magnetic component 112 and then energizes the coil 21 component. The eccentric wheel includes the magnetic component 112. The coil 21 applies a torque to the eccentric wheel 11, driving the eccentric wheel 11 and thus causing the eccentric mover 1 to rotate. The eccentric mover 1 includes a rotating shaft 12 and an eccentric wheel 11 mounted on the rotating shaft 12. The eccentric wheel 11 includes the magnetic component 112. When the coil 21 is energized, the eccentric wheel 11 is subjected to torque and rotates. The eccentric mover 1 can take many forms: for example, the eccentric wheel 11 is a circular disc with uniform mass, but the central axis of the rotating shaft 12 is offset from the center of the eccentric wheel 11; or the rotation center of the eccentric wheel 11 is the axis of the rotating shaft 12, but the eccentric wheel 11 is not a circular disc with uniform mass distribution, such as an elliptical disc. In short, the center of mass and the rotation center of the eccentric wheel 11 are not at the same point. This embodiment sets two horizontal vibration motors 10, which include an eccentric mover 1, and the eccentric mover 1 includes an eccentric wheel 11. The center of mass of the eccentric mover 1 is not at the center of the rotating shaft 12. The accelerations generated by the two eccentric movers 11 during rotation and when they encounter the limit member 5 for braking are asymmetrically distributed. The effect is that the vibration motor assembly 100 generates asymmetric vibrations when it is working. In addition, since the eccentric mover 1 is an eccentric structure, it will have a sense of vibration when it rotates. Compared with the prior art that requires an additional eccentric block to be added to the rotating shaft 12, this embodiment can generate a sense of vibration by improving the structure of the eccentric wheel 11, which is beneficial to increasing the motor speed and reducing energy consumption.

[0047] 2 and 3 , in one embodiment, the eccentric wheel 11 is formed with a notch 113, and a limiting member 5 is provided at the notch. Specifically, the notch 113 can be a fan-shaped notch. By providing a notch 113 on the eccentric wheel 11, an irregularly structured eccentric wheel 11 is obtained, so that the center of mass of the eccentric wheel 11 does not coincide with its center of rotation, and a vibration can be generated during rotation. It can also reduce the mass of the eccentric wheel 11, which is beneficial to further increase the speed of the motor 100 and reduce energy consumption. At the same time, the two sides of the notch 113 stop rotating after hitting the limiting member 5, thereby limiting the rotation angle of the eccentric wheel 11.

[0048] Referring to Figure 2, in one embodiment, the stator 2 includes a magnetic ring 22, within which the coil assembly is disposed. The magnetic ring 22, also known as a yoke, is made of stacked silicon steel sheets and is evenly and symmetrically arranged around the coil assembly to prevent leakage magnetic flux from spreading outward.

[0049] In one embodiment, the eccentric 11 rotates in an angle range of 0° to 90°; the two vibration motors 10 rotate in opposite directions, and the two vibration motors 10 collide with the two corresponding limiters 5 simultaneously. The eccentric 11 rotates in an angle range of 0° to 90°. Assuming that the eccentric 11 is initially in contact with the limiters 5, the eccentric 11 collides with the limiters 5 every 90° of rotation and then rotates in the opposite direction. The two vibration motors 10 have the same structure, with equal rotational speed and torque, but rotate in opposite directions. The opposite rotational directions of the two vibration motors 10 mean that one vibration motor 10 rotates clockwise while the other rotates counterclockwise. It is not the case that both vibration motors 10 rotate clockwise or counterclockwise at the same time, and both vibration motors 10 collide with the corresponding limiters 5 at the same time. Referring to Figures 6 and 7, the collision force is generated simultaneously, and the braking forces of the two vibration motors 10's rotors cancel each other out, eliminating the centrifugal force.

[0050] With reference to Figures 1 and 2, in one embodiment, the perpendicular midline of the line connecting the centers of the two rotating shafts 12 is used as the line of symmetry, and the two limiting members 5 are arranged in mirror images relative to the line of symmetry. The center of the rotating shaft 12 is also the rotation center of the eccentric wheel 11. The centers of the two rotating shafts 12 are connected to form a line segment, which is the line connecting the centers of the rotating shafts 12. The perpendicular midline of this line segment is the perpendicular bisector. The two limiting members 5 are arranged in mirror images relative to the perpendicular midline. With reference to Figures 4 to 7, the limiting members 5 are arranged in mirror images so that when the two eccentric movers 1 rotate and hit the limiting members 5, the x-direction components generated in the large direction can cancel each other out, leaving only the y-direction components.

[0051] Referring to Figure 3, in one embodiment, the limiting member 5 is an arc segment, the notch 113 is a fan-shaped notch 113, the center of the limiting member 5, the center of the fan-shaped notch 113, and the center of the rotating shaft 12 are concentrically arranged, and the difference between the first central angle corresponding to the fan-shaped notch 113 and the second central angle corresponding to the limiting member 5 is 90°. The limiting member 5 is an arc segment, the center of the circle corresponding to the arc, the center of the circle corresponding to the fan-shaped notch 113, and the center of the rotating shaft 12 coincide, the first central angle corresponding to the fan-shaped notch 113 is shown in Figure 3 a, and the second central angle corresponding to the limiting member 5 is shown in Figure 3 b, and the difference between a and b is 90°, so that the eccentric wheel 11 can only rotate within the range of 0° to 90°.

[0052] To clearly describe the implementation of the present invention, the technical solutions and beneficial effects of the present invention are described below with reference to the accompanying drawings:

[0053] The vibration motor assembly 100 includes two horizontally arranged vibration motors 10, each vibration motor 10 includes a stator 2, an eccentric mover 1 and a limiter 5, the stator 2 includes a magnetic ring 22 and a coil 21 component installed in the magnetic ring 22, and the coil 21 component forms a cavity; the eccentric mover 1 includes a rotating shaft 12 and an eccentric wheel 11, the eccentric wheel 11 is formed with a notch 113, and the eccentric wheel 11 includes a magnetic member 1123 sleeved on the rotating shaft 12 and a magnetic member connected to the magnetic member 1123. Component 112, the eccentric wheel 11 is arranged in the cavity and can rotate in the cavity, the rotation angle range of the eccentric wheel 11 is 0° to 90°, the rotation directions of the two vibration motors 10 are opposite, and the eccentric wheel 11 includes a permanent magnet 1121 and a mass block 1122; the limiter 5 is arranged at the notch 113 to limit the rotation angle of the eccentric wheel 11, the two limiters 5 are mirror-imaged relative to the symmetry line, and the two vibration motors 10 collide with the two corresponding limiters 5 at the same time.

[0054] Referring to Figures 4 to 11 , F1 represents centrifugal force, F2 represents braking force, Ftotal represents the resultant force acting on the vibration motor assembly 100, and the direction of the rotation arrow represents the rotation direction of the vibration motor 100. It should be noted that the magnetic conductive member 1123 and the magnetic assembly 112 are symmetrically distributed relative to the center of the rotating shaft, and since the mass block 1122 is generally large in mass, it is assumed that the center of mass is on the mass block 1122. When analyzing the force applied, the points selected are points on the mass block 1122. Specifically:

[0055] Referring to Figures 4 and 5, the vibration motor 10 on the left in Figure 4 rotates counterclockwise, while the vibration motor 10 on the right rotates clockwise. Figure 5 shows a schematic diagram of the resultant force acting on the vibration motor assembly 100 during rotation. After the rotation begins, the x-components of the torque and centrifugal force acting on the two stators 2 are equal in magnitude and opposite in direction, canceling each other out, leaving only the y-component of the centrifugal force. It should be noted that the thick curved arrow in Figure 5 indicates the direction of the torque acting on the stator 2. According to the law of action and reaction, the direction of the torque acting on the stator 2 is opposite to that of the mover 1. Since the stator 2 is fixed to the housing, it can also be the torque acting on the housing.

[0056] 6 and 7 , FIG6 shows that the eccentric wheel 11 brakes and collides with the limit member 5 after rotating 90°, and FIG7 shows a schematic diagram of the resultant force acting on the vibration motor assembly 100 when the collision occurs. At this time, the centrifugal forces of the two vibration motors 10 movers disappear, and the braking forces F2 of the two vibration motors 10 movers have the same direction, and the resultant force F is in the -y direction.

[0057] Referring to Figures 8 and 9, Figure 8 shows a schematic diagram of the reverse rotation of the eccentric wheel 11 after braking, wherein the vibration motor 10 on the left rotates clockwise and the vibration motor 10 on the right rotates counterclockwise. Figure 9 shows a schematic diagram of the resultant force acting on the reverse rotating vibration motor assembly 100. At this time, the x-components of the torque and centrifugal force acting on the two stators 2 are equal in magnitude and opposite in direction and cancel each other out, leaving only the y-component. It should be noted that the thick curved arrow in Figure 9 indicates the direction of the torque acting on the stator 2. According to the law of action and reaction, the direction of the torque acting on the stator 2 is opposite to that of the mover 1. Since the stator 2 is fixed to the housing, it can also be the torque acting on the housing.

[0058] 10 and 11 , FIG10 shows that the eccentric wheel 11 rotates 90° in the reverse direction after braking and then returns to the initial position, causing braking and colliding with the limit member 5 , and FIG11 shows a schematic diagram of the resultant force applied to the vibration motor assembly 100 when braking occurs during reverse rotation. At this time, the braking forces of the two vibration motors 10 movers cancel each other out and the centrifugal force disappears.

[0059] Because the rotor 1 is eccentric, the vibration generated during rotation and braking is asymmetric. Specifically, see Figure 12 . Curve A in Figure 12 represents the electrical signal input to the motor, and Curve B in Figure 12 represents the acceleration signal collected by the acceleration sensor from the vibration motor assembly 100. The horizontal axis represents time, the vertical axis on the left represents the input voltage, and the vertical axis on the right represents the acceleration. It can be seen that the absolute values ​​of the electrical signals input to the motor are essentially the same, but the acceleration values ​​of the vibration motor assembly 100 are different. The waveform of the acceleration signal exhibits an asymmetric distribution. Therefore, the vibration motor assembly 100 generates asymmetric vibration.

[0060] In one embodiment, the magnetic assembly 112 may include only a magnetic member 1123 and a permanent magnet 1121. The magnetic member 1123 is mounted on the rotating shaft 12, and the permanent magnets 1121 are unevenly distributed along the outer circumference of the magnetic member 1123. The outer circumference of the magnetic member 1123 refers to the entire circumference surrounding the magnetic member 1123. The uneven distribution of the permanent magnets 1121 on the outer circumference of the magnetic member 1123 has two meanings: first, there is only one permanent magnet 1121, and one permanent magnet 1121 does not form a complete circle. Therefore, the mass distribution of the eccentric wheel 11 is uneven, and the rotation center of the eccentric wheel 11 does not coincide with the center of mass of the eccentric wheel 11. Second, the permanent magnet 1121 includes multiple sub-magnets 11211, which are spaced apart and arranged on the outer circumference of the magnetic member 1123. The multiple sub-magnets 11211 are unevenly distributed along the outer circumference of the magnetic member 1123. If the sub-magnets 11211 are uniformly spaced along the periphery of the magnetic member 1123, the rotation center of the eccentric wheel 11 will coincide with the center of mass of the eccentric wheel 11, preventing the effective vibration. Therefore, multiple sub-magnets 11211 are unevenly spaced along the periphery of the magnetic member 1123.

[0061] Of course, in another embodiment, the mass and size of the iron of each sub-magnet 11211 can also be different. In this case, even if the sub-magnets 11211 are evenly spaced, the rotation center of the eccentric 11 will not coincide with the center of mass of the eccentric 11, and the eccentric mover 1 will still produce a vibration when rotating.

[0062] It should be noted that the magnetic conductive member 1123 can be formed by stacking iron sheets or silicon steel sheets, which can play a connecting and magnetic conductive role. The coil 21 assembly can include a frame and a coil 21 wound on the frame. The frame is installed on the magnetic conductive ring 22 to provide support for the winding of the coil 21, and the frame forms a cavity for the eccentric wheel 11 to rotate. Of course, it is also possible to simply not set up a frame, use enameled wire to wind the coil 21 on the mold, and then use high-temperature glue to shape the coil 21, and form a cavity for the eccentric wheel 11 to rotate in the coil 21. The number of coil 21 assemblies can be two, and the two coil 21 assemblies are arranged at intervals. The rotating shaft 12 passes through the gap between the two coils 21 and can rotate freely.

[0063] 16 , in one embodiment, the magnetic assembly 112 may include a magnetic member 1123, a permanent magnet 1121, and a mass 1122. The magnetic member 1123 is mounted on the rotating shaft 12, and the permanent magnet 1121 and the mass 1122 are arranged on the periphery of the magnetic member 1123. The mass 1122 is generally made of a material with a higher density, such as lead or tungsten alloy. The density of the mass 1122 is much greater than that of the permanent magnet 1121. When the size is set, the mass of the mass 1122 will also be set to be larger than that of the permanent magnet 1121. By setting the mass 1122, the sense of vibration can be increased.

[0064] In one embodiment, the permanent magnet 1121 includes multiple sub-magnets 11211, which are evenly spaced along the periphery of the magnetic conductive member 1123. A mounting slot capable of accommodating a mass block 1122 is formed between two adjacent sub-magnets 11211. The number of mounting slots is multiple, and the mass blocks 1122 are unevenly distributed within the multiple mounting slots. The uniform spacing of the multiple sub-magnets 11211 is intended to ensure uniform torque is applied to the eccentric 11 in all directions. Mounting slots are formed between adjacent sub-magnets 11211, and the number of mounting slots is the same as the number of sub-magnets 11211. The number of mass blocks 1122 may be one or more, with at most one mass block 1122 disposed in each mounting slot. The uneven distribution of the mass blocks 1122 within the multiple mounting slots is because a uniform distribution would cause the center of mass of the eccentric 11 to be at its own rotational center, preventing a satisfactory vibration effect.

[0065] Referring to Figures 14-16, in one embodiment, there are two sub-magnets 11211 and one mass block 1122. The mass block 1122 is disposed in two mounting slots formed between the two sub-magnets 11211, and the mass block 1122 is disposed in one of the mounting slots formed between the two sub-magnets 11211. The two sub-magnets 11211 are spaced apart to form two mounting slots, and the mass block 1122 is disposed in one of the mounting slots. This results in an uneven mass distribution of the eccentric wheel 11, and the center of mass of the eccentric wheel 11 does not coincide with the center of rotation of the eccentric wheel 11, forming an eccentric structure that can generate a sense of vibration. This embodiment achieves the ideal sense of vibration with a minimum number of sub-magnets 11211 and mass blocks 1122, and is simple to manufacture and easy to install. It should be noted that the one mounting slot of the two mounting slots where the mass block 1122 is not disposed is the notch 113 of the eccentric wheel 11 mentioned above. In a specific embodiment, both sides of the mass block 1122 are respectively in contact with the two sub-magnets 11211 , and the connection strength between the mass block 1122 and the two sub-magnets 11211 is higher.

[0066] Referring to Figure 17 , in one embodiment, the vibration motor assembly 100 further includes a stopper 5 disposed at the notch 113 to limit the rotation angle of the eccentric 11. This stopper 5 restricts the vibration motor assembly 100 to a limited range of rotation, constituting an oscillating motor. The number of stoppers 5 can be one or two, and two stoppers 5 can be spaced apart to limit the position of the eccentric 11 from either side of the notch 113.

[0067] In one embodiment, the limiting member 5 includes a limiting block and a buffer. The buffer is disposed on the contact surface of the limiting block that contacts the eccentric wheel 11. The limiting block can be made of metal to increase strength and provide support, while the buffer is used to reduce noise and cushion impact forces. Specifically, the buffer is a rubber layer or a foam layer. The buffer can be made of foam or rubber material.

[0068] Referring to Figure 13, Figure 13 shows a schematic diagram of each vibration motor 10 including an upper shell 3 and a lower shell 4. In one embodiment, the vibration motor 10 further includes an upper shell 3 and a lower shell 4. The upper shell 3 covers the top surface of the magnetic ring 22, and the lower shell 4 covers the bottom surface of the magnetic ring 22. The upper shell 3 is formed with an upper through hole 31 for mounting a stopper 5, and the lower shell 4 is formed with a lower through hole 41 for mounting a stopper 5. The upper through hole 31 and the lower through hole 41 are arranged opposite each other, and the stopper 5 can be mounted on the upper through hole 31 and the lower through hole 41 by a snap-fit ​​connection. Of course, in other embodiments, the stopper 5 can also be mounted on the magnetic ring 22. Of course, four vibration motors 10 can also be placed together in the accommodating cavity formed by the upper and lower shells using a single upper shell and a single lower shell.

[0069] It should be noted that the rotation principle of the vibration motor 10 is prior art, but to clearly illustrate the implementation of the present application, the principle of the vibration motor assembly 100 is described below using a specific embodiment. As shown in Figure 18, the vibration motor assembly 100 includes a stator 2 and an eccentric mover 1. The stator 2 includes a magnetic ring 22 and two coils 21 disposed within the magnetic ring 22. The eccentric mover 1 includes a rotating shaft 12 and an eccentric wheel 11. The eccentric wheel 11 includes a magnetic member 1123 and a permanent magnet 1121 mounted on the rotating shaft 12. The permanent magnet 1121 includes two sub-magnets 11211 uniformly and symmetrically disposed on the outer periphery of the magnetic member 1123. A mass 1122 is disposed in one of the mounting slots formed by the two sub-permanent magnets 1121. The other mounting slot forms the notch 113 of the eccentric wheel 11. First, the two sub-magnets 11211 can be magnetized. The magnetization direction of the two sub-magnets 11211 is consistent. As shown by the arrow in Figure 18, horizontal left magnetization is adopted. The coil 21 is energized in the direction shown in Figure 18, where "*" indicates that the current direction is perpendicular to the paper surface inward, and "." indicates that the current direction is perpendicular to the paper surface outward. According to Ampere's law, the eccentric mover 1 can generate a clockwise torque, that is, the eccentric mover 1 will rotate clockwise. By controlling the direction of the current in the coil 21, the vibration motor assembly 100 can be continuously rotated around the axis; the device can be used to convert electrical energy into rotational mechanical energy. The structure is simple. Since the eccentric mover 1 is an eccentric structure, it has a vibration feeling when rotating.

[0070] According to another aspect of the present invention, an electronic device is provided, comprising a housing and a vibration motor assembly 100 as described above, disposed within the housing. Because the electronic device incorporates all technical solutions of all embodiments of the vibration motor assembly 100 described above, it possesses all the beneficial effects of all of the aforementioned technical solutions, which are not detailed here. The electronic device may be a mobile phone, a game controller, or the like.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and do not limit the patent scope of the present invention. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that under the technical concept of the present invention, the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; or directly / indirectly applied to other related technical fields, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A vibration motor assembly, characterized in that: It comprises two horizontally arranged vibration motors, each of which comprises: a stator, the stator comprising a coil assembly, the coil assembly forming a cavity; An eccentric mover, the eccentric mover comprising a rotating shaft and an eccentric wheel sleeved on the rotating shaft, the eccentric wheel comprising a magnetic component, and the eccentric wheel is disposed in the cavity and can rotate in the cavity; A limiting member, wherein the limiting member is used to limit the rotation angle of the eccentric wheel.

2. The vibration motor assembly according to claim 1, characterized in that: The eccentric wheel is formed with a notch, and the limiting member is arranged at the notch.

3. The vibration motor assembly according to claim 2, characterized in that: The limiting member is an arc segment, the notch is a fan-shaped notch, the center of the limiting member, the center of the fan-shaped notch, and the center of the rotating shaft are concentrically arranged, and the difference between the first center angle corresponding to the fan-shaped notch and the second center angle corresponding to the limiting member is 90°.

4. The vibration motor assembly according to claim 1, characterized in that: The eccentric wheel rotates in an angle range of 0° to 90°; the two vibration motors rotate in opposite directions, and the two vibration motors collide with the two corresponding limit members simultaneously.

5. The vibration motor assembly according to claim 4, characterized in that: The perpendicular midline of the center line connecting the two rotating shafts is taken as the symmetry line, and the two limiting members are arranged in a mirror image relative to the symmetry line.

6. The vibration motor assembly according to any one of claims 1 to 5, characterized in that: The magnetic assembly comprises a magnetic conductive part and a permanent magnet. The magnetic conductive part is sleeved on the rotating shaft, and the permanent magnet is unevenly distributed along the outer circumference of the magnetic conductive part.

7. The vibration motor assembly according to any one of claims 1 to 5, characterized in that: The magnetic assembly comprises a magnetic conductive part, a permanent magnet and a mass block. The magnetic conductive part is sleeved on the rotating shaft, and the permanent magnet and the mass block are arranged on the outer periphery of the magnetic conductive part.

8. The vibration motor assembly according to claim 7, characterized in that: The permanent magnet includes two sub-magnets, the two sub-magnets are evenly distributed along the outer circumference of the magnetic conductive member, the two sub-magnets are formed with two mounting grooves, the number of the mass block is one, and the mass block is arranged in one of the mounting grooves.

9. The vibration motor assembly according to any one of claims 1 to 5, characterized in that: The limiting component includes a limiting block and a buffer component, and the buffer component is arranged on the abutting surface of the limiting block for abutting against the eccentric wheel.

10. An electronic device, characterized in that: The electronic device comprises a housing and a vibration motor assembly according to any one of claims 1 to 9 disposed in the housing.

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