Motor assembly and electronic device

Abstract

Provided in the present invention are a motor assembly and an electronic device. The motor assembly comprises a housing, a limiting structure arranged in the housing and at least one motor; each motor comprises a stator and two eccentric rotors, the stator comprising a coil, each eccentric rotor comprising a rotating shaft and an eccentric wheel mounted on the rotating shaft, and the eccentric wheel comprising a permanent magnet. The limiting structure is used for abutting against the two eccentric wheels to limit the rotation angle of each eccentric wheel, and each two eccentric wheels and the corresponding coil are arranged on a same plane. The motor assembly can generate asymmetric vibration, and the thickness of the motor assembly is reduced, thereby meeting manufacturing requirements for miniaturization and convenience.

Description

Motor components and electronic equipment Technical Field

[0001] The present invention relates to the technical field of motor components, and in particular to a 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. The vibrations generated by the existing linear motor rotor when it reciprocates near the equilibrium position are symmetrically distributed and cannot produce asymmetric vibrations (anisotropic vibrations).

[0003] In view of this, it is necessary to provide a new 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 motor assembly and an electronic device, aiming to solve the technical problem in the prior art that motors cannot provide anisotropic vibration.

[0006] To achieve the above-mentioned purpose, according to one aspect of the present invention, the present invention provides a motor assembly, comprising a shell, a limiting structure arranged on the shell and at least one motor, each of the motors comprising a stator and two eccentric movers, the stator comprising a coil, each of the eccentric movers comprising a rotating shaft and an eccentric wheel mounted on the rotating shaft, the eccentric wheel comprising a permanent magnet, the limiting structure being used to abut against the eccentric wheel to limit the rotation angle of each eccentric wheel, and each two eccentric wheels and their corresponding coils being arranged on the same plane.

[0007] In one embodiment, the limiting structure includes a first limiting member and a second limiting member, and each eccentric wheel includes a first abutting surface and a second abutting surface, the first abutting surface is used to abut with the first limiting member, and the second abutting surface is used to abut with the second limiting member.

[0008] In one embodiment, the stator further includes a coil bracket mounted on the housing, the coil is sleeved on the coil bracket, and the second limiting members are formed at both ends of the coil bracket.

[0009] In one embodiment, the coil includes two sub-coils, and the two sub-coils are both mounted on the coil support.

[0010] In one embodiment, the coil support is made of a magnetic conductive material or a non-magnetic conductive material.

[0011] In one embodiment, the eccentric wheel is a permanent magnet wheel, the first abutting surface and the second abutting surface of each eccentric wheel have opposite magnetic poles, and the first abutting surfaces of the two eccentric wheels have opposite magnetic poles.

[0012] In one embodiment, the first limiting member and the second limiting member are arranged perpendicular to each other, the rotation angle and the reverse rotation angle of the eccentric wheel are both in the range of 0° to 90°, and the rotation directions of the two eccentric movers are opposite.

[0013] In one embodiment, the eccentric wheel is a semicircular wheel or a U-shaped wheel.

[0014] In one embodiment, the eccentric mover further includes a magnetic conductive ring, and the magnetic conductive ring is arranged on a side of the eccentric wheel away from the coil.

[0015] According to another aspect of the present invention, the present invention further provides an electronic device, comprising a housing and the motor assembly as described above disposed in the housing.

[0016] In the above embodiment, the motor assembly includes a housing, a retaining structure disposed within the housing, and at least one motor. Each motor includes a stator and two eccentric movers. The stator includes a coil. Each eccentric mover includes a rotating shaft and an eccentric wheel mounted on the rotating shaft. The eccentric wheel includes a permanent magnet. When the coil is energized, the magnetic field generated by the coil drives the eccentric wheel to rotate back and forth. The retaining structure is configured to abut against the two eccentric wheels to limit the rotation angle of each eccentric wheel. Each two eccentric wheels and their corresponding coils are disposed on the same plane. The retaining structure is configured to be disposed along the rotation path of the eccentric wheel to limit the rotation angle of the eccentric wheel. Each motor includes a stator and two eccentric movers. The stator includes a coil. The coil is electrically connected to an external power source and is capable of generating an induced magnetic field when energized. Specifically, the coil can be supplied with alternating current with a periodic current direction, so that when energized, the coil generates an induced magnetic field with a periodic magnetic pole direction. The permanent magnet can be inherently magnetic or can be magnetized prior to use, thereby generating magnetic poles at both ends of the permanent magnet. Based on the principle that like charges repel and opposite charges attract, by passing a current with varying direction through the coil, the eccentric wheel can be driven to rotate toward or away from the coil, thus enabling the eccentric wheel to rotate back and forth, generating asymmetric vibration. Furthermore, the present invention arranges both eccentric wheels and the coil on the same plane, designing components that occupy larger spaces on the same plane. Compared to technical solutions that stack the eccentric wheels or place the coil on top or bottom of the eccentric wheel, this reduces the thickness of the housing, thereby reducing the thickness of the entire motor assembly, meeting the requirements of miniaturization and convenience in manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] FIG1 is a schematic structural diagram of a motor assembly according to an embodiment of the present invention;

[0019] FIG2 is a schematic diagram of the three-dimensional structure of a motor assembly according to an embodiment of the present invention;

[0020] FIG3 is a schematic structural diagram of the rotation of two eccentric rotors of a motor assembly according to an embodiment of the present invention;

[0021] FIG4 is a schematic diagram of the resultant force acting on the housing of the motor assembly in the state shown in FIG3 ;

[0022] FIG5 is a schematic structural diagram of a motor assembly colliding with a second limiting member according to an embodiment of the present invention;

[0023] FIG6 is a schematic diagram of the resultant force acting on the housing of the motor assembly in the state shown in FIG5 ;

[0024] FIG7 is a schematic diagram of a structure in which two eccentric rotors of a motor assembly rotate in opposite directions according to an embodiment of the present invention;

[0025] FIG8 is a schematic diagram of the resultant force acting on the housing of the motor assembly in the state of FIG7 ;

[0026] FIG9 is a schematic structural diagram of a motor assembly colliding with a first limiting member according to an embodiment of the present invention;

[0027] FIG10 is a schematic diagram of the resultant force acting on the housing of the motor assembly in the state shown in FIG9 ;

[0028] FIG11 is a waveform diagram of an input voltage signal and an acceleration signal when the motor assembly rotates according to an embodiment of the present invention.

[0029] Description of labels:

[0030] 100. Motor assembly; 1. Eccentric mover; 11. Eccentric wheel; 111. First abutting surface; 112. Second abutting surface; 12. Rotating shaft; 13. Magnetic ring; 14. Connecting ring; 2. Stator; 21. Coil; 22. Coil bracket; 3. Housing; 4. First limit member; 5. Second limit member.

[0031] 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

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Referring to Figures 1 and 2, in order to clearly show the structure of the limiting structure and the motor, Figures 1 and 2 are structural schematic diagrams that hide the upper half of the shell 3. According to one aspect of the present invention, the present invention provides a motor assembly 100, including a shell 3, a limiting structure arranged on the shell 3 and at least one motor, each motor including a stator 2 and two eccentric movers 1, the stator 2 including a coil 21, each eccentric mover 1 including a rotating shaft 12 and an eccentric wheel 11 installed on the rotating shaft 12, the eccentric wheel 11 including a permanent magnet, the limiting structure is used to abut against the two eccentric wheels 11 to limit the rotation angle of each eccentric wheel 11, and every two eccentric wheels 11 and their corresponding coils 21 are arranged on the same plane.

[0037] In the above embodiment, the eccentric 11 rotates about the rotating shaft 12. The center of rotation of the eccentric 11 is the center of the rotating shaft 12. The center of mass of the eccentric 11 and its center of rotation are not coincident, which can produce a vibration during rotation. The housing 3 forms a receiving cavity, within which a limiting structure and a motor are disposed. Specifically, the motor and limiting structure are both mounted on the inner wall of the housing 3. The limiting structure is disposed along the rotation path of the eccentric 11, configured to collide with the eccentric 11 and limit the rotation angle of the eccentric 11. Each motor includes a stator 2 and two eccentric movers 1. The stator 2 includes a coil 21. The coil 21 is electrically connected to an external power source and is capable of generating an induced magnetic field when energized. Specifically, a current with a periodically changing direction can be passed through the coil 21, such that the coil 21 generates an induced magnetic field with a periodically changing magnetic pole direction when energized. The permanent magnet can be inherently magnetic, or it can be magnetized prior to use, thereby generating magnetic poles at both ends of the permanent magnet. According to the principle that like poles repel and opposite poles attract, by passing a current with changing direction through the coil 21, the eccentric wheel 11 can be driven to rotate toward the coil 21 or away from the coil 21, so that the eccentric wheel 11 can rotate back and forth, generating asymmetric vibration. Of course, the number of eccentric movers 1 can also be set to four, six, eight, etc. in pairs. For example, when four eccentric movers 1 are provided, the number of motors is two, and the four eccentric movers 1 can all be provided on the same plane, that is, two motors are provided on the same plane; or the two motors can be stacked, that is, four eccentric motors 1 are stacked in pairs, and the provision of four eccentric movers 1 can produce a torsional effect. Moreover, when there are multiple motors, the number of limiting structures can also be set to multiple, with each motor provided on a corresponding limiting structure. In this embodiment, the two eccentric wheels 11 and the coil 21 of the same motor are arranged on the same plane, and the components that occupy a larger space are designed on the same plane. Compared with the technical solution of stacking the eccentric wheels 11 or arranging the coil 21 on the top or bottom of the eccentric wheel 11, the thickness of the shell 3 can be reduced, and the thickness of the entire motor assembly 100 is also reduced, which meets the production requirements of miniaturization and convenience.

[0038] It should be noted that after the permanent magnet is magnetized, coil 21 is energized to generate a magnetic field. This generated magnetic field interacts with the permanent magnet, driving the permanent magnet's motion. When the direction of the current in coil 21 reverses, the direction of the magnetic field generated by coil 21 also changes, driving the permanent magnet's motion in the opposite direction. This change in the direction of the current in coil 21, in turn, drives the eccentric wheel 11 to reciprocate.

[0039] 1 and 2 , in one embodiment, the limiting structure includes a first limiting member 4 and a second limiting member 5 , and each eccentric wheel 11 includes a first abutting surface 111 and a second abutting surface 112 . The first abutting surface 111 is configured to abut the first limiting member 4 , and the second abutting surface 112 is configured to abut the second limiting member 5 . When the first abutting surface 111 abuts the first limiting member 4 , that is, when the first abutting surface 111 hits the first limiting member 4 , the rotation of the eccentric wheel 11 stops, and the direction of the current is changed, causing the eccentric wheel 11 to rotate in the opposite direction. Similarly, when the second abutting surface 112 rotates to abut and collide with the second limiting member 5 , the rotation of the eccentric wheel 11 stops, and the direction of the current is changed, causing the eccentric wheel 11 to rotate in the opposite direction. It should be noted that during the rotation of the two eccentric wheels 11 , both eccentric wheels 11 may collide with the first limiting member 4 or the second limiting member 5 at the same time. The structures, shapes and sizes of the two eccentrics can be designed to be identical, and the two eccentrics can be arranged in a mirror-symmetrical manner. In this way, the first limiting member 4 and the second limiting member 5 respectively limit the forward rotation angle and the reverse rotation angle of the eccentric 11.

[0040] 1 and 2 , in one embodiment, the stator 2 further includes a coil support 22 mounted on the housing 3. The coil 21 is mounted on the coil support 22, and second stoppers 5 are formed at both ends of the coil support 22. The coil 21 can be directly fixed to the housing 3, or the coil support 22 can be mounted on the housing 3 and then mounted on the coil support 22. The second stoppers 5 are formed at both ends of the coil support 22. In other words, the coil support 22 not only serves to mount the coil 21, but also forms the second stoppers 5 at both ends to limit the rotation angle of the eccentric wheel 11.

[0041] In one embodiment, the coil 21 includes two sub-coils, both of which are mounted on a coil support 22. The coil support 22 includes second stoppers 5 at both ends and a connecting rod connecting the two second stoppers 5. The two sub-coils are respectively mounted on the connecting rod. Current with periodic direction changes is passed through each sub-coil to control the reciprocating motion of the corresponding eccentric wheel 11, thereby achieving the effect of independently controlling the two eccentric movers 1.

[0042] In one embodiment, coil support 22 is made of a magnetically conductive material or a non-magnetic material. Coil support 22 can be made of a magnetically conductive material so that when coil 21 is energized, it becomes magnetized, specifically generating magnetic poles in the same direction as those generated by energized coil 21, thereby enhancing the electromagnetic effect. Of course, in another embodiment, coil support 22 can also be made of a non-magnetic material, such as plastic, to eliminate static magnetostatic force.

[0043] 3 , in one embodiment, the eccentric wheel 11 is a permanent magnet wheel, and the first abutting surface 111 and the second abutting surface 112 of each eccentric wheel 11 have opposite magnetic pole polarities, and the first abutting surfaces 111 of the two eccentric wheels 11 have opposite magnetic pole polarities. The eccentric wheel 11 is a permanent magnet wheel, and the permanent magnet wheel includes a first abutting surface 111 that abuts the first stopper 4 and a second abutting surface 112 that abuts the second stopper 5. The first abutting surface 111 and the second abutting surface 112 have opposite magnetic pole polarities. Furthermore, the first abutting surfaces 111 of the two eccentric wheels 11 have opposite magnetic pole polarities, and the second abutting surfaces 112 of the two eccentric wheels 11 also have opposite magnetic pole polarities. Because the coil 21 generates induced magnetic poles with opposite polarities at both ends after being energized, the polarities of the two second abutting surfaces 112 need to be opposite in order for the magnetic poles at both ends of the coil 21 to simultaneously exert an attractive force or a repulsive force on the two eccentrics 11, causing the two eccentrics 11 to simultaneously move toward or away from the second limiting member 5. As shown in Figure 3, the polarity of the first abutting surface 111 of the left eccentric 11 is the N pole, and the polarity of the second abutting surface 112 is the S pole. The polarity of the first abutting surface 111 of the right eccentric 11 is the S pole, and the polarity of the second abutting surface 112 is the N pole. The left end of the coil 21 is the N pole, and the right end of the coil 21 is the S pole. The induced magnetic poles generated by the coil 21 simultaneously attract the two eccentrics 11 to rotate toward the coil 21.

[0044] In one embodiment, the first limit member 4 and the second limit member 5 are arranged perpendicular to each other, the rotation angle and the reverse rotation angle range of the eccentric 11 are both 0° to 90°, and the rotation directions of the two eccentric movers 1 are opposite. The maximum rotation angle of the eccentric 11 referred to here is 90°. After colliding with the first limit member 4 and stopping after rotating 90°, it can be reversely rotated 90° and collided with the second limit member 5 again and stopped. The two eccentrics 11 have the same structure, the same rotation speed and torque, but opposite rotation directions. The opposite rotation directions of the two eccentrics 11 mean that one eccentric 11 rotates clockwise and the other eccentric 11 rotates counterclockwise. The two eccentrics 11 will not rotate clockwise or counterclockwise at the same time.

[0045] In one embodiment, the eccentric wheel 11 is a semicircular wheel or a U-shaped wheel. The shape of the eccentric wheel 11 can be various, and can be a semicircular wheel or a U-shaped wheel. Those skilled in the art can configure it according to actual needs. Those skilled in the art will understand that when the maximum rotation angle of the eccentric wheel 11 is required to be 90°, the structure of the eccentric wheel 11 needs to be specifically configured according to the shape of the limiting structure. For example, when the first limiting member 4 and the second limiting member 5 are perpendicular, a semicircular wheel or a U-shaped wheel is generally used.

[0046] In one embodiment, the eccentric mover 1 further includes a magnetic ring 13, which is arranged on the side of the eccentric wheel 11 away from the coil 21. The magnetic ring 13 can be distributed around the periphery of the eccentric wheel 11, as shown in Figure 1. When the eccentric wheel 11 is a semicircular wheel, the magnetic ring 13 can be arranged on the arc surface of the semicircular wheel. Of course, when the eccentric wheel 11 is a U-shaped wheel, the magnetic ring 13 can be arranged on the arc surface of the U-shaped wheel to avoid collision with the first limit member 4 or the second limit member 5. The design of the magnetic ring 13 can increase the eccentric effect and thus enhance the sense of vibration. At the same time, the magnetic ring 13 is generally made of cold-pressed steel plate, and can also play a role in magnetic isolation to avoid mutual interference between the two eccentric movers 1.

[0047] In one embodiment, the eccentric mover 1 further includes a connecting ring 14, which is mounted on the rotating shaft 12 and to which the eccentric wheel 11 is connected. The connecting ring 14 is rotatable about the rotating shaft 12. Compared with being directly connected to the rotating shaft 12, the connection area of ​​the eccentric wheel 11 to the connecting ring 14 can be increased, thereby improving the reliability of the connection.

[0048] In one embodiment, the surfaces of the first and second stoppers 4, 5 are provided with a buffer member, which is a rubber or foam layer. The buffer member is disposed on the contact surfaces of the first and second stoppers 4, 5 that abut the eccentric wheel 11. The first and second stoppers 4, 5 can be made of metal to increase strength. The buffer member is used to reduce noise, cushion impact forces, and prevent damage. Specifically, the buffer member can be made of foam or rubber.

[0049] To clearly describe the implementation of the present invention, the main technical solutions and beneficial effects of the present invention are described as follows with reference to the accompanying drawings:

[0050] 1 and 3 , assuming that FIG1 shows the initial state of the eccentric 11, the first abutting surface 111 of the left eccentric 11 is the N pole, and the second abutting surface 112 of the left eccentric 11 is the S pole. The first abutting surface 111 of the right eccentric 11 is the S pole, and the second abutting surface 112 of the right eccentric 11 is the N pole. When current is applied to the coil 21, an induced magnetic field is generated, which is equivalent to the left side of the coil 21 being the N pole and the right side of the coil 21 being the S pole. According to the principle of opposite poles attracting, the N pole on the left side of the coil 21 will attract the S pole of the left eccentric 11 to rotate toward the coil 21, and the S pole on the right side of the coil 21 will attract the N pole of the right eccentric 11 to move toward the coil 21. The rotation directions of the left and right eccentrics 11 are shown by arrows A in FIG3 . At this time, the centrifugal force is shown by F1 in FIG3 , and the left and right directions are shown as marked in FIG3 . Referring to Figure 4, Figure 4 is a schematic diagram of the resultant force applied to the housing 3 of the motor assembly 100 in the state of Figure 3, wherein the curved arrows H represent the torques generated by the two eccentric wheels 11 to the housing 3 respectively, and the two torque forces are equal in magnitude and opposite in direction, and cancel each other out; the components of the two centrifugal forces F1 in the x-direction are equal in magnitude and opposite in direction, and cancel each other out; the components of the two centrifugal forces F1 in the y-direction are equal in magnitude and in the same direction, forming a resultant force Fn, and the direction of the resultant force is the positive y-direction.

[0051] Referring to Figures 5 and 6, Figure 5 illustrates a schematic diagram of the structure of motor assembly 100 according to an embodiment of the present invention when it collides with second stopper 5; Figure 6 illustrates the resultant force acting on housing 3 of motor assembly 100 in the state shown in Figure 5. When eccentric wheel 11 continues to rotate from the state shown in Figure 3, it collides with second stopper 5. The centrifugal force at the moment of collision disappears, generating a braking force as shown by F2 in Figure 5. Referring to Figure 6, the two braking forces are equal in magnitude and direction, forming a resultant force Fn. At this point, a person holding the device can feel a strong vibration in the negative y direction.

[0052] Referring to Figures 7 and 8, Figure 7 is a schematic diagram of the structure of the two eccentric rotors of the motor assembly 100 of the embodiment of the present invention rotating in opposite directions; Figure 8 is a schematic diagram of the resultant force applied to the housing 3 of the motor assembly 100 in the state of Figure 7; when the eccentric wheel 11 collides with the second limiter 5, the current direction of the coil 21 is changed, and a reverse current is applied. At this time, the induced magnetic field generated by the coil 21 after power is applied is reversed, which is equivalent to the S pole on the left side of the coil 21 and the N pole on the right side of the coil 21, but the magnetic pole directions of the two eccentric wheels 11 remain unchanged. According to the principle that like polarities repel, the S pole on the left side of the coil 21 will drive the S pole of the left eccentric wheel 11 to rotate away from the coil 21, and the N pole on the right side of the coil 21 will drive the N pole of the right eccentric wheel 11 to move away from the coil 21. The rotation directions of the left eccentric wheel 11 and the right eccentric wheel 11 are shown by arrows A in Figure 7, and the centrifugal force at this time is shown by F1 in Figure 7. Referring to Figure 8, the curved arrows H in Figure 8 represent the torques generated by the two eccentric wheels 11 to the housing 3 respectively. The two torque forces are equal in magnitude and opposite in direction and cancel each other out. The components of the two centrifugal forces F1 in the x-direction are equal in magnitude and opposite in direction and cancel each other out. The components of the two centrifugal forces F1 in the y-direction are equal in magnitude and in the same direction, forming a resultant force Fn, and the direction of the resultant force is the positive y-direction.

[0053] Referring to Figures 9 and 10, Figure 9 is a schematic diagram of the structure of the motor assembly 100 according to an embodiment of the present invention when it collides with the first stopper 4; Figure 10 is a schematic diagram of the resultant force acting on the housing 3 of the motor assembly 100 in the state shown in Figure 9. When the eccentric wheel 11 continues to rotate from the state shown in Figure 7, it collides with the first stopper 4. The centrifugal force at the moment of collision disappears, and the braking force generated is shown as F2 in Figure 9. Referring to Figure 10, the two braking forces are equal in magnitude and opposite in direction, canceling each other out, resulting in no or minimal vibration.

[0054] Because it is an eccentric rotor 11, the vibration generated during the rotation and braking process is asymmetric vibration. Specifically, please refer to Figure 11. Curve A in Figure 11 represents the electrical signal input by the motor, and curve B in Figure 11 represents the acceleration signal collected by the acceleration sensor for the motor component 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 value of the electrical signal input by the motor is basically the same, but the acceleration value of the motor component 100 is different. The waveform of the acceleration signal is asymmetric. Therefore, it can be said that the motor component 100 generates asymmetric vibration.

[0055] In summary, the motor assembly 100 can generate asymmetric vibration, and by arranging the two eccentric wheels 11 and the coil 21 on the same plane, the thickness of the motor assembly 100 can be reduced.

[0056] According to another aspect of the present invention, an electronic device is provided, comprising a housing and a motor assembly 100 as described above, disposed within the housing. Because the electronic device incorporates all technical solutions of all embodiments of the motor assembly 100 described above, it possesses all the beneficial effects of all of the aforementioned technical solutions, and thus will not be further detailed here. The electronic device may be, for example, a mobile phone or a game controller.

[0057] 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 motor assembly, characterized in that: It includes a shell, a limiting structure arranged on the shell and at least one motor, each of the motors includes a stator and two eccentric movers, the stator includes a coil, each of the eccentric movers includes a rotating shaft and an eccentric wheel installed on the rotating shaft, the eccentric wheel includes a permanent magnet, the limiting structure is used to abut against the eccentric wheel to limit the rotation angle of each eccentric wheel, and every two eccentric wheels and their corresponding coils are arranged on the same plane.

2. The motor assembly according to claim 1, characterized in that: The limiting structure includes a first limiting member and a second limiting member, and each of the eccentric wheels includes a first abutting surface and a second abutting surface, the first abutting surface is used to abut against the first limiting member, and the second abutting surface is used to abut against the second limiting member.

3. The motor assembly according to claim 2, characterized in that: The stator further comprises a coil support mounted on the housing, the coil is sleeved on the coil support, and both ends of the coil support form the second limiting member.

4. The motor assembly according to claim 3, characterized in that: The coil includes two sub-coils, and the two sub-coils are both installed on the coil support.

5. The motor assembly according to claim 3, characterized in that: The coil support is made of a magnetic conductive material or a non-magnetic conductive material.

6. The motor assembly according to claim 2, characterized in that: The eccentric wheel is a permanent magnet wheel, the first abutting surface and the second abutting surface of each eccentric wheel have opposite magnetic pole polarities, and the first abutting surfaces of the two eccentric wheels have opposite magnetic pole polarities.

7. The motor assembly according to claim 2, characterized in that: The first limiting member and the second limiting member are arranged perpendicular to each other, the rotation angle and the reverse rotation angle of the eccentric wheel are both in the range of 0° to 90°, and the rotation directions of the two eccentric movers are opposite.

8. The motor assembly according to any one of claims 1 to 7, characterized in that: The eccentric wheel is a semicircular wheel or a U-shaped wheel.

9. The motor assembly according to any one of claims 1 to 7, characterized in that: The eccentric mover also includes a magnetic conductive ring, and the magnetic conductive ring is arranged on a side of the eccentric wheel away from the coil.

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

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