Vibration motor assembly and electronic device

Abstract

The application provides a vibration motor assembly and an electronic device. The vibration motor assembly comprises a first motor set and a second motor set. The first motor set and the second motor set each comprise two vibration motors. The four vibration motors are arranged along the same plane. Each vibration motor comprises a stator, an eccentric rotor and a limiting piece. The stator comprises a coil assembly. The coil assembly is formed with a cavity. The eccentric rotor comprises a rotating shaft and an eccentric wheel sleeved on the rotating shaft. The eccentric wheel comprises a magnetic assembly. The eccentric wheel is arranged in the cavity and can rotate in the cavity. The limiting piece is used to limit the rotation angle of the eccentric wheel. The first motor set and the second motor set of the vibration motor assembly are controlled respectively, so that asymmetric rotation, i.e. different direction rotation, can be generated.

Description

Technical Field

[0001] This invention relates to the field of vibration motor assembly technology, and more particularly to a vibration motor assembly and electronic device. Background Technology

[0002] Vibratory motors are widely used in various industries. They are devices that convert electrical energy into mechanical energy. Most existing vibratory motors are linear motors. When they reciprocate near the equilibrium position, the rotation they produce is symmetrical and they cannot produce asymmetrical rotation (opposite rotation).

[0003] Therefore, it is necessary to provide a new vibration motor assembly and electronic device to solve or at least alleviate the above-mentioned technical defects. Summary of the Invention

[0004] The main objective of this invention is to provide a vibration motor assembly and electronic device, which aims to solve the technical problem that motors in the prior art cannot provide anisotropic rotation.

[0005] To achieve the above objectives, according to one aspect of the present invention, a vibration motor assembly is provided, comprising a first motor group and a second motor group, wherein both the first motor group and the second motor group include two vibration motors, and the four vibration motors are arranged along the same plane, each vibration motor comprising:

[0006] The stator includes a coil assembly having a cavity;

[0007] An eccentric mover includes a rotating shaft and an eccentric wheel fitted onto the rotating shaft. The eccentric wheel includes a magnetic component and is disposed within the cavity and is capable of rotating within the cavity. The centers of the rotating shafts of the four vibration motors are respectively located at the four vertices of a quadrilateral.

[0008] A limiting member is provided to limit the rotation angle of the eccentric wheel.

[0009] In one embodiment, the eccentric wheel has a notch, and the limiting member is disposed at the notch.

[0010] 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°.

[0011] In one embodiment, the eccentric wheel rotates in an angle range of 0° to 90°; in the first motor group, the two vibration motors rotate in the same direction, and the two vibration motors collide with the two corresponding limiting members simultaneously; in the second motor group, the two vibration motors rotate in the same direction, and the two vibration motors collide with the two corresponding limiting members simultaneously.

[0012] In one embodiment, in the first motor assembly, the two limiting members are centrally symmetrical about the midpoint of the line connecting the centers of the two rotating shafts; in the second motor assembly, the two limiting members are centrally symmetrical about the midpoint of the line connecting the centers of the two rotating shafts of the two vibration motors of the second motor assembly.

[0013] In one embodiment, the two vibration motors of the first motor group are a first motor and a second motor, and the two vibration motors of the second motor group are a third motor and a fourth motor. The first motor and the third motor are arranged adjacent to each other, and the second motor and the fourth motor are arranged adjacent to each other. With the perpendicular bisector of the line connecting the centers of the rotating shafts of the first motor and the third motor as the line of symmetry, the limiting members in the first motor group and the second motor group are arranged symmetrically.

[0014] In one embodiment, the magnetic component includes a magnetic conductor, a permanent magnet, and a mass block. The magnetic conductor is mounted on the rotating shaft, and the permanent magnet and the mass block are disposed on the outer periphery of the magnetic conductor.

[0015] In one embodiment, the permanent magnet includes two sub-magnets, which are evenly distributed at intervals along the outer periphery of the magnetic conductor and form two mounting slots. The mass block is one piece, which is disposed in one of the mounting slots.

[0016] In one embodiment, the limiting member includes a limiting block and a buffer member, the buffer member being disposed on the contact surface of the limiting block for contacting the eccentric wheel.

[0017] According to another aspect of the present invention, the present invention also provides an electronic device comprising a housing and a vibration motor assembly as described above disposed within the housing.

[0018] In the above scheme, the vibration motor assembly includes a first motor group and a second motor group, each of which includes two vibration motors. The four vibration motors are arranged along the same plane. Each vibration motor includes a stator, an eccentric mover, and a limiting member. The stator includes a coil assembly with a cavity. The eccentric mover includes a shaft and an eccentric wheel fitted onto the shaft. The eccentric wheel includes a magnetic component and is located within the cavity, allowing it to rotate within the cavity. The centers of the shafts of the four vibration motors are located at the four vertices of a quadrilateral. The limiting member restricts the rotation angle of the eccentric wheel. This invention, by setting four horizontally oriented vibration motors, divided into two groups, each group including two vibration motors, and because each vibration motor includes an eccentric mover, and the eccentric mover includes an eccentric wheel, and the center of mass of the eccentric mover is not at the center of the shaft, allows the first and second motor groups to be controlled separately, resulting in asymmetrical rotation, i.e., anisotropic rotation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the vibration motor assembly according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the vibration motor assembly (hidden coil assembly) according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the vibration motor according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the first motor unit of the vibration motor assembly rotating to braking according to an embodiment of the present invention;

[0024] Figure 5 for Figure 4 A schematic diagram of the forces acting on the vibration motor assembly under the specified conditions;

[0025] Figure 6 This is a schematic diagram of the first motor group of the vibration motor assembly in an embodiment of the present invention rotating in the reverse direction to brake;

[0026] Figure 7 for Figure 6 A schematic diagram of the forces acting on the vibration motor assembly under the specified conditions;

[0027] Figure 8This is a schematic diagram of the second motor unit of the vibration motor assembly rotating to braking according to an embodiment of the present invention;

[0028] Figure 9 for Figure 8 A schematic diagram of the forces acting on the vibration motor assembly under the specified conditions;

[0029] Figure 10 This is a schematic diagram of the second motor group of the vibration motor assembly in an embodiment of the present invention rotating in the opposite direction to braking;

[0030] Figure 11 for Figure 10 A schematic diagram of the forces acting on the vibration motor assembly under the specified conditions;

[0031] Figure 12 This is a schematic diagram of the exploded structure of the vibration motor according to an embodiment of the present invention;

[0032] Figure 13 This is a schematic diagram of the stator and eccentric mover of the vibration motor according to an embodiment of the present invention;

[0033] Figure 14 This is a schematic diagram of the magnetic ring and eccentric mover of the vibration motor according to an embodiment of the present invention;

[0034] Figure 15 This is a schematic diagram of the eccentric mover of the vibration motor according to an embodiment of the present invention;

[0035] Figure 16 This is another structural schematic diagram of the stator and eccentric mover of the vibration motor according to an embodiment of the present invention;

[0036] Figure 17 This is a cross-sectional structural diagram of the vibration motor according to an embodiment of the present invention.

[0037] Label Explanation:

[0038] 100. Vibration motor assembly; 110. First motor group; 120. Second motor group; 10. Vibration motor; 101. First motor; 102. Second motor; 103. Third motor; 104. Fourth motor; 1. Eccentric mover; 11. Eccentric wheel; 112. Magnetic assembly; 1121. Permanent magnet; 11211. Sub-magnet; 1122. Mass block; 1123. Magnetic guide; 113. Notch; 12. Rotating shaft; 2. Stator; 21. Coil; 22. Magnetic guide ring; 3. Upper shell; 31. Upper through hole; 4. Lower shell; 41. Lower through hole; 5. Limiting component.

[0039] The realization of the objective, functional characteristics and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that all directional indicators (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0043] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0044] Reference Figure 1 , Figure 2 , Figures 13-15 According to one aspect of the present invention, a vibration motor assembly 100 is provided, comprising a first motor group 110 and a second motor group 120. Both the first motor group 110 and the second motor group 120 include two vibration motors 10, and the four vibration motors 10 are arranged along the same plane. Each vibration motor 10 includes a stator 2, an eccentric mover 1, and a limiting member 5. The stator 2 includes a coil 21 assembly, which forms a cavity. The eccentric mover 1 includes a rotating shaft 12 and an eccentric wheel 11, which forms a notch 113. The eccentric wheel 11 includes a rotating shaft 12 fitted onto the rotating shaft 12, and the eccentric wheel 11 includes a magnetic component 112. The eccentric wheel 11 is disposed within the cavity and is rotatable within the cavity. The centers of the rotating shafts 12 of the four vibration motors 10 are respectively located at the four vertices of a quadrilateral. The limiting member 5 is used to limit the rotation angle of the eccentric wheel 11.

[0045] The vibration motor 10 first magnetizes the magnetic component 112, then energizes the coil 21 assembly. The eccentric wheel includes the magnetic component 112, and 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 fitted onto the rotating shaft 12. The eccentric wheel 11 includes the magnetic component 112, and after the coil 21 is energized, the eccentric wheel 11 will rotate under torque. The eccentric mover 1 can take various forms: for example, the eccentric wheel 11 is a disk 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 disk with uniform mass distribution, such as an elliptical disk. In short, the center of mass and the rotation center of the eccentric wheel 11 are not at the same point. This embodiment uses four horizontally positioned vibration motors 10, divided into two groups, each group consisting of two motors 10. Each vibration motor 10 includes an eccentric mover 1, which in turn includes an eccentric wheel 11. The center of mass of the eccentric mover 1 is not located at the center of the rotating shaft 12. The first motor group 110 and the second motor group 120 are controlled independently, enabling asymmetrical rotation, i.e., anisotropic rotation. Furthermore, because the eccentric mover 1 has an eccentric structure, it generates vibration during rotation. Compared to the prior art, which requires adding an additional eccentric block to the rotating shaft 12, this embodiment generates vibration simply by improving the structure of the eccentric wheel 11, which is beneficial for increasing motor speed and reducing energy consumption.

[0046] Reference Figure 3 In one embodiment, the eccentric wheel 11 has 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 irregular structure eccentric wheel 11 is obtained, so that the center of mass of the eccentric wheel 11 does not coincide with its rotation center, which can generate vibration when rotating. 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 rotation stops when the two sides of the notch 113 touch the limiting member 5, thereby limiting the rotation angle of the eccentric wheel 11.

[0047] Reference Figure 13 In one embodiment, the stator 2 includes a magnetic ring 22, and the coil assembly is disposed within the magnetic ring 22. The magnetic ring 22, also known as a magnetic yoke, is a yoke iron made of stacked silicon steel sheets. It is evenly and symmetrically distributed around the coil assembly to constrain the outward diffusion of leakage magnetic flux.

[0048] Reference Figure 4 , Figure 6 , Figure 8 and Figure 10In one embodiment, the eccentric wheel 11 rotates in an angle range of 0° to 90°. In the first motor group 110, the two vibration motors 10 rotate in the same direction, and both vibration motors 10 collide with their respective corresponding limiting members 5 simultaneously. In the second motor group 120, the two vibration motors 10 rotate in the same direction, and both vibration motors 10 collide with their respective corresponding limiting members 5 simultaneously. The eccentric wheel 11 rotates in an angle range of 0° to 90°, and the eccentric wheel 11 collides with the limiting member 5 every 90° of rotation, and then rotates in the opposite direction. In a specific embodiment, in the first motor group 110, the two limiting members 5 are centrally symmetrical about the midpoint of the line connecting the centers of the two rotating shafts 12; in the second motor group 120, the two limiting members 5 are centrally symmetrical about the midpoint of the line connecting the centers of the two rotating shafts 12 of the two vibration motors 10 in the second motor group 120. "Same rotation direction" means that the two vibration motors 10 rotate clockwise or counterclockwise simultaneously. By driving different motor groups to move in different directions of rotation, the vibration motor assembly 100 has at least four motion states:

[0049] State 1, counter-clockwise rotation state, the first motor unit 110 is... Figure 2 The state shown moves to Figure 4 The process of the state will Figure 2 The state shown is considered the initial state of the vibration motor assembly 100, and the first motor group 110 consists of... Figure 2 The state moves to Figure 4 The state shown is referenced. Figure 2 , Figure 2 The two motors on the left are the first motor group 110, and the two motors on the right are the second motor group 120. The first motor group 110 and the second motor group 120 can be controlled independently. Assume... Figure 2 The initial position is the middle position. The two vibration motors 10 of the first motor group 110 are controlled to rotate counterclockwise simultaneously. During rotation, the y-axis force generated by the vibration motors 10 cancels each other out, leaving only the x-axis component, creating the sensation of counterclockwise rotation, until the position is reached. Figure 4 The location shown; refer to Figure 4 and Figure 5 Exercise to Figure 4 When the eccentric wheel 11 collides with the limiting member 5, the centrifugal force disappears, leaving only the braking forces F1 and F2. F1 and F2 are not collinear, and the points of application of the forces are different, resulting in a counterclockwise rotation.

[0050] State 2, no rotational sensation, the first motor unit 110 is... Figure 4 The state moves to Figure 6 In the process shown, when the two vibration motors 10 of the first motor group 110 encounter the limit member 5, they are driven to rotate in the opposite direction, i.e., clockwise. At this time, refer to Figure 7 During rotation, the x-axis force generated by the two vibrating motors 10 cancels each other out, and the y-axis force also cancels each other out, resulting in no sensation of rotation or translation until the motion reaches... Figure 6 The location shown; refer to Figure 6 and Figure 7 Exercise to Figure 6 When the eccentric wheel 11 collides with the limiting member 5, the centrifugal force disappears, leaving only the braking forces F1 and F2. F1 and F2 are equal in magnitude and opposite in direction, canceling each other out, so there is no feeling of rotation or translation.

[0051] State 3, clockwise rotation state, the second motor unit 120 is... Figure 2 The state shown moves to Figure 8 The process of the state will Figure 2 The state shown is considered the initial state of the vibration motor assembly 100, and the second motor group 120 is composed of... Figure 2 The state moves to Figure 8 The state shown is referenced. Figure 2 , Figure 2 The two motors on the left are the first motor group 110, and the two motors on the right are the second motor group 120. The first motor group 110 and the second motor group 120 can be controlled independently. Assume... Figure 2 The initial position of the second motor group 120 on the right is used to control the two vibration motors 10 of the second motor group 120 to rotate clockwise simultaneously, as shown in the reference. Figure 9 During the rotation, the y-axis components of the two vibrating motors 10 cancel each other out, leaving only the x-axis component, creating a clockwise rotation sensation until the motion reaches... Figure 8 The location shown; refer to Figure 8 and Figure 9 Exercise to Figure 8 When the eccentric wheel 11 collides with the limiting member 5, the centrifugal force disappears, leaving only the braking forces F3 and F4. F3 and F4 are not collinear, and the points of application of the forces are different, resulting in a clockwise rotation sensation.

[0052] State 4, no rotational sensation, first motor unit 110 is Figure 8 The state moves to Figure 10 In the process shown, when the two vibration motors 10 of the second motor group 120 encounter the limit member 5, they are driven to rotate in the opposite direction, i.e., counterclockwise. (Refer to...) Figure 11 At this point, the x-axis components of the forces generated by the two vibrating motors 10 during rotation cancel each other out, and the y-axis components also cancel each other out, resulting in no sensation of rotation or translation. (Refer to...) Figure 10 and Figure 11 Exercise to Figure 10When the eccentric wheel 11 collides with the limiting member 5, the centrifugal force disappears, leaving only the braking forces F3 and F4. F3 and F4 are equal in magnitude and opposite in direction, canceling each other out, so there is no feeling of rotation or translation.

[0053] In summary, if only the two vibrating motors 10 of the first motor group 110 on the left are driven counterclockwise, a counterclockwise rotation sensation can be produced; if the two vibrating motors 10 of the first motor group 110 on the left are driven in the opposite direction, there is no sensation of rotation or translation. Similarly, if only the two vibrating motors 10 of the second motor group 120 on the right are driven clockwise, a clockwise rotation sensation can be produced; if the two vibrating motors 10 of the second motor group 120 on the right are driven in the opposite direction, there is no sensation of rotation or translation. Since the vibrating motor 10 includes an eccentric mover 1, and the eccentric mover 1 includes an eccentric wheel 11, and the center of mass of the eccentric mover 1 is not at the center of the rotating shaft 12, the first motor group 110 and the second motor group 120 can be controlled separately, resulting in asymmetrical rotation, i.e., anisotropic rotation.

[0054] Reference Figure 3 In one embodiment, the limiting member 5 is an arc segment, and 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. 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, and 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 difference between the first central angle corresponding to the fan-shaped notch 113 and the second central angle is... Figure 3 As shown in Figure a, the second central angle corresponding to the limiting member 5 is as follows: Figure 3 As shown in b, the difference between a and b is 90°, which means that the eccentric wheel 11 can only rotate within the range of 0° to 90°.

[0055] In one embodiment, the quadrilateral is a square. The four vibration motors 10 are located at the four vertices of the square, that is, the vibration motors 10 are arranged in a 2*2 array. This symmetrical design can effectively cancel out the unwanted force components when the vibration motors 10 of the first motor group 110 and the second motor group 120 rotate.

[0056] In one embodiment, the two vibration motors 10 of the first motor group 110 are a first motor 101 and a second motor 102, and the two vibration motors 10 of the second motor group 120 are a third motor 103 and a fourth motor 104. The first motor 101 and the third motor 103 are arranged adjacent to each other, and the second motor 102 and the fourth motor 104 are arranged adjacent to each other. The limiting members in the first and second motor groups are symmetrically arranged with the perpendicular bisector of the line connecting the centers of the shafts of the first and third motors as the line of symmetry. This design also allows for simultaneous reverse driving of the first motor 101 and the third motor 103, or simultaneously reverse driving of the second motor 102 and the fourth motor 104, thus generating asymmetrical vibration.

[0057] In one embodiment, the magnetic component 112 may consist only of a magnetic conductor 1123 and a permanent magnet 1121. The magnetic conductor 1123 is mounted on the rotating shaft 12, and the permanent magnets 1121 are non-uniformly distributed along the outer periphery of the magnetic conductor 1123. The outer periphery of the magnetic conductor 1123 refers to the entire circumference surrounding the magnetic conductor 1123. The non-uniform distribution of the permanent magnets 1121 along the outer periphery of the magnetic conductor 1123 has two meanings: First, the number of permanent magnets 1121 is one piece, and one permanent magnet 1121 is not a complete circle, thus causing the mass distribution of the eccentric wheel 11 to be 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 on the outer periphery of the magnetic conductor 1123 and are non-uniformly distributed along the outer periphery of the magnetic conductor 1123. When the sub-magnets 11211 are of the same size and mass, if the sub-magnets 11211 are evenly distributed along the outer periphery of the magnetic conductor 1123, the rotation center of the eccentric wheel 11 will coincide with the center of mass of the eccentric wheel 11, and a good vibration effect cannot be generated. Therefore, multiple sub-magnets 11211 need to be non-uniformly distributed along the outer periphery of the magnetic conductor 1123.

[0058] Of course, in another embodiment, the mass and size of each of the individual magnets 11211 can also be different. In this case, even if the individual magnets 11211 are evenly distributed, the rotation center of the eccentric wheel 11 will not coincide with the center of mass of the eccentric wheel 11, and the eccentric mover 1 will still produce a vibration when it rotates.

[0059] It should be noted that the magnetic conductive element 1123 can be formed by stacking iron sheets or silicon steel sheets, serving both a connecting and magnetic guiding function. The coil 21 assembly can include a coil frame and a coil 21 wound on the coil frame. The coil frame is mounted on the magnetic ring 22 to provide support for the winding of the coil 21, and the coil frame forms a cavity for the eccentric wheel 11 to rotate. Alternatively, the coil frame can be omitted, and enameled wire can be wound into a coil 21 on a mold, then shaped with high-temperature adhesive to form the coil 21, with a cavity formed inside the coil 21 for the eccentric wheel 11 to rotate. There can be two coil assemblies, spaced apart, with the rotating shaft 12 passing through the gap between the two coils 21 and able to rotate freely.

[0060] Reference Figure 15 In one embodiment, the magnetic component 112 may include a magnetic conductor 1123, a permanent magnet 1121, and a mass block 1122. The magnetic conductor 1123 is mounted on the rotating shaft 12, and the permanent magnet 1121 and the mass block 1122 are disposed on the outer periphery of the magnetic conductor 1123. The mass block 1122 is generally made of a high-density material, such as lead or tungsten alloy. The density of the mass block 1122 is much greater than that of the permanent magnet 1121, and its mass is also set to be larger than that of the permanent magnet 1121. By setting the mass block 1122, the vibration can be increased.

[0061] In one embodiment, the permanent magnet 1121 includes multiple sub-magnets 11211, which are evenly distributed along the outer periphery of the magnetic conductor 1123. A mounting groove capable of accommodating a mass block 1122 is formed between adjacent sub-magnets 11211. The number of mounting grooves is multiple, and the mass blocks 1122 are non-uniformly distributed within these grooves. The evenly distributed sub-magnets 11211 ensure that the eccentric wheel 11 experiences uniform torque in all directions. The mounting grooves formed between adjacent sub-magnets 11211 are the same as the number of sub-magnets 11211. The number of mass blocks 1122 may be one or multiple, with a maximum of one mass block 1122 placed in each mounting groove. The non-uniform distribution of the mass blocks 1122 within the multiple mounting grooves is because a uniform distribution would cause the center of mass of the eccentric wheel 11 to be at its own rotational center, failing to produce a satisfactory vibration.

[0062] Reference Figures 13-15In one embodiment, there are two sub-magnets 11211 and one mass block 1122. The mass block 1122 is disposed in one of the two mounting slots formed by the two sub-magnets 11211. The two sub-magnets 11211 are spaced apart to form the two mounting slots, and the mass block 1122 is only installed 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 vibration. This embodiment achieves the ideal vibration effect 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 mounting slot in which the mass block 1122 is not disposed is the notch 113 of the eccentric wheel 11 mentioned above. In one specific embodiment, the two sides of the mass block 1122 abut against two sub-magnets 11211 respectively, thereby increasing the connection strength between the mass block 1122 and the two sub-magnets 11211.

[0063] Reference Figure 16 In one embodiment, the vibration motor assembly 100 further includes a limiting member 5, which is disposed at the notch 113 to limit the rotation angle of the eccentric wheel 11. The limiting member 5 ensures that the vibration motor assembly 100 can only swing within a limited angle, thus becoming an oscillating motor. The number of limiting members 5 can be one or two. When there are two limiting members 5, they can be arranged at intervals to limit the eccentric wheel 11 from both sides of the notch 113 respectively.

[0064] In one embodiment, the limiting member 5 includes a limiting block and a buffer member, the buffer member being disposed on the contact surface of the limiting block for abutting against the eccentric wheel 11. The limiting block may be made of metal material, serving to improve strength and provide support, while the buffer member is used to reduce noise and buffer impact force. Specifically, the buffer member is a rubber layer or a foam layer. The buffer member may be made of foam or rubber material.

[0065] Reference Figure 12 , Figure 12This diagram illustrates that each vibration motor 10 includes 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 has an upper through hole 31 for mounting a limiting member 5, and the lower shell 4 has a lower through hole 41 for mounting the limiting member 5. The upper through hole 31 and the lower through hole 41 are positioned opposite each other, and the limiting member 5 can be mounted on the upper through hole 31 and the lower through hole 41 by snap-fit. Of course, in other embodiments, the limiting member 5 can also be mounted on the magnetic ring 22. Alternatively, four vibration motors 10 can be housed together in the receiving cavity formed by the upper shell 3 and the lower shell 4 using one upper shell 3 and one lower shell 4.

[0066] It should be noted that the rotation principle of the vibration motor assembly 100 is prior art; however, to clearly illustrate the implementation of this application, a specific embodiment is used to explain the principle of the vibration motor assembly 100 as follows. Figure 17 As shown, 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 shaft 12 and an eccentric wheel 11. The eccentric wheel 11 includes a magnetic guide 1123 fitted onto the shaft 12 and a permanent magnet 1121. The permanent magnet 1121 includes two sub-magnets 11211 evenly and symmetrically disposed around the outer periphery of the magnetic guide 1123. A mass block 1122 is disposed in one of the mounting slots formed by the two sub-permanent magnets 1121, and the other mounting slot forms a notch 113 in the eccentric wheel 11. First, the two sub-magnets 11211 can be magnetized, with the magnetization directions of the two magnets 11211 being consistent, such as... Figure 17 The middle arrow indicates that the magnetization is performed horizontally to the left, and the energization of coil 21 is as follows: Figure 17 As shown in the diagram, "*" indicates that the current direction is perpendicular to the paper and inwards, and "." indicates that the current direction is perpendicular to the paper and outwards. 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 made to rotate continuously around the axis. This device can convert electrical energy into rotational mechanical energy. It has a simple structure, and because the eccentric mover 1 is an eccentric structure, it has its own vibration when rotating.

[0067] According to another aspect of the present invention, the present invention also provides an electronic device, which includes a housing and a vibration motor assembly 100 as described above disposed within the housing. Since the electronic device incorporates all the technical solutions of all embodiments of the vibration motor assembly 100 described above, it possesses all the beneficial effects brought by all the above technical solutions, which will not be elaborated upon here. The above-described electronic device may be a mobile phone or a game controller, etc.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit the patent scope of this invention. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that, under the technical concept of this invention, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; or they can be directly / indirectly applied to other related technical fields. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A vibration motor assembly, characterized in that, The system includes a first motor group and a second motor group, each of which includes two vibration motors. The four vibration motors are arranged along the same plane, and each vibration motor includes: The stator includes a coil assembly having a cavity; An eccentric mover includes a rotating shaft and an eccentric wheel fitted onto the rotating shaft. The eccentric wheel includes a magnetic component and is disposed within the cavity and is capable of rotating within the cavity. The centers of the rotating shafts of the four vibration motors are respectively located at the four vertices of a quadrilateral. A limiting member, the limiting member being used to limit the rotation angle of the eccentric wheel; The eccentric wheel has a notch, and the limiting member is disposed at the notch; The limiting component is an arc segment, and the notch is a fan-shaped notch. The center of the limiting component, the center of the fan-shaped notch, and the center of the rotating shaft are concentrically arranged. The difference between the first central angle corresponding to the fan-shaped notch and the second central angle corresponding to the limiting component is 90°.

2. The vibration motor assembly according to claim 1, characterized in that, The eccentric wheel rotates in an angle range of 0° to 90°; in the first motor group, the two vibration motors rotate in the same direction and collide with the two corresponding limiting members simultaneously; in the second motor group, the two vibration motors rotate in the same direction and collide with the two corresponding limiting members simultaneously.

3. The vibration motor assembly according to claim 2, characterized in that, In the first motor assembly, the two limiting members are centrally symmetrical about the midpoint of the line connecting the centers of the two rotating shafts; in the second motor assembly, the two limiting members are centrally symmetrical about the midpoint of the line connecting the centers of the two rotating shafts of the two vibration motors in the second motor assembly.

4. The vibration motor assembly according to claim 1, characterized in that, The two vibration motors in the first motor group are the first motor and the second motor, and the two vibration motors in the second motor group are the third motor and the fourth motor. The first motor and the third motor are arranged adjacent to each other, and the second motor and the fourth motor are arranged adjacent to each other. With the perpendicular bisector of the line connecting the centers of the shafts of the first motor and the third motor as the line of symmetry, the limiting members in the first motor group and the limiting members in the second motor group are arranged symmetrically.

5. The vibration motor assembly according to any one of claims 1 to 4, characterized in that, The magnetic component includes a magnetic conductor, a permanent magnet, and a mass block. The magnetic conductor is mounted on the rotating shaft, and the permanent magnet and the mass block are disposed on the outer periphery of the magnetic conductor.

6. The vibration motor assembly according to claim 5, characterized in that, The permanent magnet includes two sub-magnets, which are evenly distributed along the outer periphery of the magnetic conductor and form two mounting slots. The mass block is one piece, which is disposed in one of the mounting slots.

7. The vibration motor assembly according to any one of claims 1 to 4, characterized in that, The limiting component includes a limiting block and a buffer component, wherein the buffer component is disposed on the contact surface of the limiting block for contacting the eccentric wheel.

8. An electronic device, characterized in that, The electronic device includes a housing and a vibration motor assembly as described in any one of claims 1 to 7 disposed within the housing.

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