Vibration device and electronic device

Abstract

The application provides a vibration device and an electronic device, the vibration device comprising two vibration motors vertically stacked, each vibration motor comprising a stator, an eccentric rotor and a limiting piece, the stator comprising a coil assembly, the coil assembly being formed with a cavity; the eccentric rotor comprising a rotating shaft and an eccentric wheel sleeved on the rotating shaft, the eccentric wheel comprising a magnetic assembly, the eccentric wheel being arranged in the cavity and being capable of rotating in the cavity; and the limiting piece being used to limit the rotating angle of the eccentric wheel. The vibration device is provided with two vibration motors vertically stacked, each vibration motor comprising an eccentric rotor, the eccentric rotor comprising an eccentric wheel, the eccentric wheel comprising a magnetic assembly, the accelerations generated by the two eccentric rotors during rotation and when the limiting piece is braked are asymmetrically distributed, and the effect is that the vibration device generates asymmetric vibration when working.

Description

Technical Field

[0001] This invention relates to the field of vibration device technology, and more particularly to a vibration device 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 vibrations they produce are symmetrically distributed and cannot produce asymmetrical vibrations (anisotropic vibrations).

[0003] Therefore, it is necessary to provide a new vibration device and electronic equipment 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 device and electronic device that aims to solve the technical problem that motors in the prior art cannot provide anisotropic vibration.

[0005] To achieve the above objectives, according to one aspect of the present invention, a vibration device is provided, comprising two vibration motors stacked vertically, each of the vibration motors comprising: The stator includes a coil assembly having a cavity; An eccentric mover, the eccentric mover including a rotating shaft and an eccentric wheel fitted on the rotating shaft, the eccentric wheel including a magnetic component, the eccentric wheel being disposed in the cavity and capable of rotating in the cavity; A limiting member is provided to limit the rotation angle of the eccentric wheel.

[0006] In one embodiment, the eccentric wheel has a notch, and the limiting member is disposed at the notch.

[0007] 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°.

[0008] In one embodiment, 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 simultaneously with the two corresponding limiting members.

[0009] In one embodiment, the center point of the two limiting members and the rotating shaft are projected vertically onto the same projection plane; on the projection plane, the line connecting the midpoint of the line connecting the two limiting members and the center point is defined as a line of symmetry, and the two limiting members are set in a mirror image relative to the line of symmetry.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] In one embodiment, the stator further includes a magnetic ring, and the coil assembly is disposed within the magnetic ring.

[0014] According to another aspect of the present invention, the present invention also provides an electronic device comprising a housing and a vibration device as described above disposed within the housing.

[0015] In the above scheme, the vibration device includes two vibration motors stacked vertically, each vibration motor including a coil assembly forming a cavity; an eccentric mover including a shaft and an eccentric wheel fitted onto the shaft, the eccentric wheel including a magnetic component, the eccentric wheel being disposed within the cavity and capable of rotating within the cavity; a limiting member is used to limit the rotation angle of the eccentric wheel. This invention, by setting two vertically stacked vibration motors, each including an eccentric mover, an eccentric wheel, and a magnetic component, achieves an asymmetrical distribution of acceleration generated by the two eccentric movers during rotation and when braking against the limiting member, resulting in asymmetrical vibration during the operation of the vibration device. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the structure of the vibration device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the vibration device according to an embodiment of the present invention, showing two vertically stacked vibration motors horizontally. Figure 3This is a schematic diagram of the structure of the vibration motor according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the vibration device rotating according to an embodiment of the present invention; Figure 5 for Figure 4 A force diagram of the vibrating device under certain conditions; Figure 6 This is a schematic diagram of the braking of the vibration device according to an embodiment of the present invention; Figure 7 for Figure 6 A force diagram of the vibrating device under certain conditions; Figure 8 This is a schematic diagram of the vibration device rotating in the reverse direction according to an embodiment of the present invention; Figure 9 for Figure 8 A force diagram of the vibrating device under certain conditions; Figure 10 This is a schematic diagram of the reverse braking of the vibration device according to an embodiment of the present invention; Figure 11 for Figure 10 A force diagram of the vibrating device under certain conditions; Figure 12 This is a waveform diagram of the input voltage signal and acceleration signal when the vibration device rotates according to an embodiment of the present invention; Figure 13 This is a schematic diagram of the exploded structure of the vibration motor according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the stator and eccentric mover of the vibration motor according to an embodiment of the present invention; Figure 15 This is a schematic diagram of the magnetic ring and eccentric mover of the vibration motor according to an embodiment of the present invention; Figure 16 This is a schematic diagram of the eccentric mover of the vibration motor according to an embodiment of the present invention; Figure 17 This is another structural schematic diagram of the stator and eccentric mover of the vibration motor according to an embodiment of the present invention; Figure 18 This is a cross-sectional structural diagram of the vibration motor according to an embodiment of the present invention.

[0018] Label Explanation: 100. Vibration device; 10. Vibration 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.

[0019] 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

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Reference Figure 1 , Figure 2 as well as Figures 13-15 It should be noted that, for the convenience of explaining the rotational action and force of the vibratory motor 10, the vertically stacked vibratory motors 10 are shown in a horizontal orientation. Figure 2 The left side of the middle section represents the upper vibratory motor 10 among two stacked vibratory motors 10. Figure 2The right side of the image shows the lower of two stacked vibration motors 10. According to one aspect of the present invention, a vibration device 100 is provided, comprising two vibration motors 10 stacked vertically. 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 with a cavity. The eccentric mover 1 includes a rotating shaft 12 and an eccentric wheel 11 with a notch 113. The eccentric wheel 11 includes a rotating shaft 12 fitted onto the rotating shaft 12 and includes a magnetic component 112. The eccentric wheel 11 is disposed within the cavity and is rotatable within the cavity. The limiting member 5 is used to limit the rotation angle of the eccentric wheel 11.

[0025] The vibration motor 10 first magnetizes the magnetic component 112. 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 fitted onto the rotating shaft 12. The eccentric wheel 11 includes the magnetic component 112. When 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 employs two vertically stacked vibration motors 10, each including an eccentric mover 1 and 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 acceleration generated by the two eccentric movers 1 during rotation and when they stop upon encountering the limiting member 5 is asymmetrically distributed, resulting in asymmetrical vibration when the vibration device 100 operates. Furthermore, because the eccentric mover 1 has an eccentric structure, it inherently generates vibration during rotation. Compared to the prior art which requires adding an extra 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.

[0026] Reference Figure 2 and 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.

[0027] Reference Figure 2 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.

[0028] In one embodiment, the eccentric wheel 11 rotates within an angle range of 0° to 90°; the two vibration motors 10 rotate in opposite directions, and both vibration motors 10 collide with their respective corresponding limiting members 5 simultaneously. The eccentric wheel 11 rotates within an angle range of 0° to 90°, colliding with the limiting member 5 every 90° of rotation, and then rotating in the opposite direction. The two vibration motors 10 have identical structures, with equal rotational speeds and torques, but rotate in opposite directions. This means that one vibration motor 10 rotates clockwise while the other rotates counterclockwise; both motors 10 will not rotate clockwise or counterclockwise simultaneously, and the collisions between the two vibration motors 10 and their corresponding limiting members 5 occur at the same time. (Refer to...) Figure 6 and Figure 7 The braking forces of the two vibrating motors cancel each other out, and the centrifugal force disappears.

[0029] Reference Figure 1 and Figure 2 In one embodiment, the center points of the two limiting members 5 and the rotating shaft 12 are projected vertically onto the same projection plane. On the projection plane, the line connecting the midpoint of the line connecting the two limiting members 5 and the center point is defined as a line of symmetry, and the two limiting members 5 are mirror images of the line of symmetry. Because the two vibrating motors 10 are stacked vertically, their center points coincide, which is the rotation center of the eccentric wheel 11. On the projection plane, the two center points coincide and have one central projection, while the two limiting members 5 have two projections. The center points of the two projections can be selected, and the center points and central projections can be connected to form a line of symmetry. The projections of the two limiting members 5 are mirror images of the line of symmetry. (Refer to...) Figure 4 and Figure 5 The relative positions of the two limiting members 5 are defined in this way so that the two eccentric movers 1 can collide with their respective limiting members 5 at the same time.

[0030] Reference Figure 3In 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°.

[0031] To clearly describe the implementation of the present invention, the technical solution and beneficial effects of the present invention will be explained below in conjunction with the accompanying drawings: The vibration device 100 includes two vertically stacked vibration motors 10. Each vibration motor 10 includes a stator 2, an eccentric mover 1, and a limiting member 5. The stator 2 includes a magnetic ring 22 and a coil 21 assembly installed within the magnetic ring 22. The coil 21 assembly forms a cavity. The eccentric mover 1 includes a rotating shaft 12 and an eccentric wheel 11. The eccentric wheel 11 forms a notch 113. The eccentric wheel 11 includes a magnetic guide 1123 fitted onto the rotating shaft 12 and a magnetic component 112 connected to the magnetic guide 1123. The eccentric wheel 11 is disposed within the cavity and can rotate within the cavity. The angle range is 0°~90°, the two vibration motors 10 rotate in opposite directions, the eccentric wheel 11 includes a permanent magnet 1121 and a mass block 1122; the limiting member 5 is set at the notch 113 to limit the rotation angle of the eccentric wheel 11, and the center point of the two limiting members 5 and the rotating shaft 12 are projected onto the same projection plane in the vertical direction; on the projection plane, the line connecting the midpoint and the center point of the two limiting members 5 is defined as the line of symmetry, the two limiting members 5 are set in a mirror image with respect to the line of symmetry, and the two vibration motors 10 collide with the two corresponding limiting members 5 at the same time.

[0032] Reference Figures 4-11 It should be noted that, for the convenience of explaining the rotational action of the vibratory motor 10 and the force applied to it, the two vertically stacked vibratory motors 10 are shown as if they were arranged in a horizontal direction. Figure 4 , Figure 6 , Figure 8 , Figure 10 The left side of the middle section represents the upper vibratory motor 10 among two stacked vibratory motors 10. Figure 4 , Figure 6 , Figure 8 , Figure 10The right side of the diagram represents the lower of two stacked vibratory motors 10. F1 represents centrifugal force, F2 represents braking force, Fnet represents the net force acting on the vibratory device 100, and the direction of the rotating arrow indicates the rotation direction of the vibratory motor 10. It should be noted that the magnetic conductor 1123 and magnetic assembly 112 are symmetrically distributed relative to the center of the rotating shaft 12, and since the mass block 1122 generally has a large mass, its center of mass is assumed to be on the mass block 1122. Therefore, the point on the mass block 1122 is selected as the force point when analyzing the force. Specifically: Reference Figure 4 and Figure 5 , Figure 4 The left-hand vibrating motor 10 represents the uppermost vibrating motor 10 in the stacked arrangement, which rotates counterclockwise; the right-hand vibrating motor 10 represents the lowermost vibrating motor 10 in the stacked arrangement, which rotates clockwise. Figure 5 This diagram illustrates the resultant force acting on the vibrating device 100 during rotation. After 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... Figure 5 The thick curved arrow indicates the direction of the torque acting on stator 2. According to the law of action and reaction, the direction of the torque acting on stator 2 is opposite to the direction of the rotor 1. Since stator 2 is fixed to the housing, the torque could also be the torque acting on the housing.

[0033] Reference Figure 6 and Figure 7 , Figure 6 This indicates that after the eccentric wheel 11 rotates 90°, it brakes and collides with the limiting component 5. Figure 7 This diagram illustrates the resultant force acting on the vibration device 100 when a collision occurs. At this time, the centrifugal force of the two moving parts of the two vibration motors 10 disappears, the braking force F2 of the two moving parts of the two vibration motors 10 is in the same direction, and the resultant force F is in the -y direction.

[0034] Reference Figure 8 and Figure 9 , Figure 8 This diagram illustrates the eccentric wheel 11 rotating in the opposite direction after braking. The left vibratory motor 10 rotates clockwise, while the right vibratory motor 10 rotates counter-clockwise. Figure 9 This diagram illustrates the resultant force acting on the counter-rotating vibration device 100. At this point, 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 the y-component. It should be noted that... Figure 9 The thick curved arrow indicates the direction of the torque acting on stator 2. According to the law of action and reaction, the direction of the torque acting on stator 2 is opposite to the direction of the rotor 1. Since stator 2 is fixed to the housing, the torque could also be the torque acting on the housing.

[0035] Reference Figure 10 and Figure 11 , Figure 10 This indicates that after the eccentric wheel 11 is braked, it rotates 90° in the opposite direction and returns to its initial position, during which it brakes and collides with the limiting member 5. Figure 11 This diagram illustrates the resultant force acting on the vibrating device 100 when braking occurs during reverse rotation. At this time, the braking forces of the two vibrating motors 10 cancel each other out, and the centrifugal force disappears.

[0036] Because it is an eccentric mover 1, the vibration generated during rotation and braking is asymmetric. See [reference needed] for details. Figure 12 , Figure 12 The A-curve represents the electrical signal input to the motor. Figure 12 The B-curve represents the acceleration signal collected by the accelerometer from the vibration device 100. The horizontal axis represents time, the left vertical axis represents the input voltage, and the right vertical axis represents the acceleration. It can be seen that the absolute values ​​of the electrical signals input to the motor are basically the same, but the acceleration values ​​of the vibration device 100 are different. The waveform of the acceleration signal exhibits an asymmetrical distribution; therefore, it can be said that the vibration device 100 produces asymmetrical vibration.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Reference Figure 16 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.

[0041] 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.

[0042] Reference Figures 14-16In 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.

[0043] Reference Figure 17 In one embodiment, the vibration device 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 device 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.

[0044] 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.

[0045] Reference Figure 13 , Figure 13This 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.

[0046] It should be noted that the rotation principle of the vibration motor 10 is existing technology, but in order to clearly illustrate the implementation method of this application, a specific embodiment is used to explain the principle of the vibration device 100 as follows. Figure 18 As shown, the vibration device 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 18 The middle arrow indicates that the magnetization is performed horizontally to the left, and the energization of coil 21 is as follows: Figure 18 As shown in the middle direction, where " "" 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 device 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. Since the eccentric mover 1 is an eccentric structure, it has its own vibration when rotating.

[0047] According to another aspect of the present invention, the present invention also provides an electronic device, which includes a housing and a vibration device 100 as described above disposed within the housing. Since the electronic device includes all the technical solutions of all embodiments of the vibration device 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-mentioned electronic device may be a mobile phone or a game controller, etc.

[0048] 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 device, characterized in that, It includes two vibration motors stacked vertically, each vibration motor comprising: The stator includes a coil assembly having a cavity; An eccentric mover, the eccentric mover including a rotating shaft and an eccentric wheel fitted on the rotating shaft, the eccentric wheel including a magnetic component, the eccentric wheel being disposed in the cavity and capable of rotating in the cavity; A limiting member is used to limit the rotation angle of the eccentric wheel. The center point of the two limiting members and the rotating shaft are projected onto the same projection plane in the vertical direction. On the projection plane, the line connecting the midpoint of the line connecting the two limiting members and the center point is defined as a line of symmetry. The two limiting members are set in a mirror image with respect to the line of symmetry. 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 simultaneously with their respective corresponding limiting members.

2. The vibration device according to claim 1, characterized in that, The eccentric wheel has a notch, and the limiting member is disposed at the notch.

3. The vibration device according to claim 2, characterized in that, 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°.

4. The vibration device according to any one of claims 1 to 3, 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.

5. The vibration device according to claim 4, 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.

6. The vibration device according to any one of claims 1 to 3, 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.

7. The vibration device according to any one of claims 1 to 3, characterized in that, The stator also includes a magnetic ring, and the coil assembly is disposed within the magnetic ring.

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

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