A vibrating motor

Abstract

The present invention relates to a vibration motor, which comprises a stator and a rotor rotatably arranged in the stator. A winding is provided in the stator. The rotor comprises a rotor seat and a first magnet arranged on the rotor seat. The first magnet is arranged in cooperation with the winding. The rotor seat is rotatably mounted on the stator. The vibration motor further comprises a plurality of second magnets cooperating with the first magnet. The second magnets are arranged around the central axis of the stator. One end of each second magnet is connected to the stator through a first elastic member, and the other end of each second magnet is connected to the stator through a second elastic member. The second magnets are movably mounted on the stator through the first elastic members and the second elastic members. After adopting the technical solution of the present invention, second magnets are added on the basis of the existing vibration motor. During the rotation of the first magnet, the first magnet interacts with the second magnets, driving the second magnets to compress and stretch the elastic members to achieve repeated movement, thereby generating a stronger vibration effect. The present invention has the advantage of simple structure.

Description

Technical Field

[0001] The present invention relates to a vibration motor. Background Art

[0002] Vibration motors are essential components for electronic products such as mobile phones, tablet computers, and electronic toys, providing tactile feedback to users. Currently, commonly used vibration motors include rotary eccentric motors, linear vibration motors, piezoelectric vibration motors, etc. Rotary eccentric motors adopt a rotary eccentric motor structure, which adds an unbalanced counterweight or eccentric wheel to the motor rotor and drives the rotor to rotate through a brush to generate vibration. According to their appearance structure, this type of vibration motor for mobile phones can be divided into two common structures: cylindrical and button-shaped. Linear vibration motors are composed of springs, mass blocks, permanent magnets, and coils. The working principle is to apply alternating current or pulsed current to the coil, causing the magnetic field generated by the coil to change continuously, so that the vibration unit makes reciprocating linear motion to generate vibration. Piezoelectric vibration motors use piezoelectric materials, with a weight installed on a thin sheet or thin disk, and utilize the characteristics of piezoelectric materials to contract or expand after being energized to drive the weight to reciprocate, thereby generating vibration.

[0003] Rotary eccentric motors have some defects, such as slow response time, high power consumption, poor structural stability, and short lifespan. Linear motors can only vibrate in specific directions (X, Y, Z), and the tactile feedback is relatively single. Piezoelectric vibration motors have a relatively high voltage level, it is difficult to generate sufficient vibration sensation and feedback effect at low voltage, and the process precision requirements are relatively high. There are still many technical difficulties to be overcome before commercialization.

[0004] In view of this, the inventor of this case conducted in-depth research on the above problems, and thus this case was born. Summary of the Invention

[0005] The purpose of the present invention is to provide a vibration motor with a simple structure and capable of multi-directional vibration.

[0006] To achieve the above purpose, the present invention adopts the following technical solution:

[0007] A vibration motor includes a stator and a rotor rotatably disposed in the stator. The stator is provided with windings. The rotor includes a rotor seat and a first magnet disposed on the rotor seat. The first magnet is arranged in cooperation with the windings. The rotor seat is rotatably mounted on the stator. The vibration motor further includes a plurality of second magnets cooperating with the first magnet. The second magnets are arranged around the central axis of the stator. One end of each second magnet is connected to the stator through a first elastic member, and the other end of each second magnet is connected to the stator through a second elastic member. The second magnets are movably mounted on the stator through the first elastic member and the second elastic member.

[0008] As a preferred embodiment of the present invention, the stator is provided with a mounting groove, the mounting groove having a first groove wall and a second groove wall arranged along the radial direction of the stator, the first elastic member being connected to the first groove wall, the second elastic member being connected to the second groove wall, and the second magnet being suspended in the mounting groove.

[0009] As a preferred embodiment of the present invention, both the first elastic member and the second elastic member are springs.

[0010] As a preferred embodiment of the present invention, there are eight second magnets, and the eight second magnets are evenly arranged along the circumferential direction of the stator.

[0011] As a preferred embodiment of the present invention, the stator includes a housing and a stator core disposed in the housing, the stator core being provided with a plurality of stator teeth arranged circumferentially, and the winding being wound around the stator teeth.

[0012] As a preferred embodiment of the present invention, the housing includes a cylindrical body and a first end cover and a second end cover disposed at both axial ends of the cylindrical body, the stator core being installed in the cylindrical body, and the rotor seat being rotatably installed on the first end cover and the second end cover through a rotating shaft.

[0013] As a preferred embodiment of the present invention, both the first magnet and the second magnet are magnetic steels, there are a plurality of first magnets, and the plurality of first magnets are arranged circumferentially along the rotor seat.

[0014] As a preferred embodiment of the present invention, the sizes or magnetic properties of the second magnets are not all the same.

[0015] As a preferred embodiment of the present invention, the elastic coefficients of the first elastic members are not all the same, and the elastic coefficients of the second elastic members are not all the same.

[0016] After adopting the technical solution of the present invention, a second magnet is added on the basis of the existing vibration motor. Both ends of the second magnet are suspended in the stator through elastic members. After the winding in the stator is energized, the first magnet on the rotor rotates accordingly. During the rotation of the first magnet, it interacts with the second magnet, driving the second magnet to compress and stretch the elastic members to achieve repeated movements. The second magnet can vibrate several times when the rotor rotates one week, generating a stronger vibration effect. The present invention has the advantage of simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial exploded structural schematic diagram of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the present invention.

[0019] Figure 3 It is a schematic diagram of the mating structure of the rotor and the stator in the present invention.

[0020] Figure 4 This is a schematic structural view of the rotor and stator of the present invention at another angle.

[0021] Figure 5 This is a schematic structural view of the rotor of the present invention.

[0022] In the figure:

[0023] Rotor seat 10, first magnet 11

[0024] Rotating shaft 12, card slot 13

[0025] Bearing seat 14, bearing 15

[0026] Shell 21, first end cover 211

[0027] Second end cover 212, cylinder body 213

[0028] Stator iron core 22, stator teeth 23

[0029] Mounting groove 24, first groove wall 241

[0030] Second groove wall 242, second magnet 30

[0031] First elastic member 31, second elastic member 32 Detailed implementation manners

[0032] In order to further explain the technical solution of the present invention, the following will be elaborated in detail in combination with embodiments.

[0033] Refer to Figures 1 to 5 , a vibration motor, including a stator and a rotor rotatably arranged in the stator. A winding is provided in the stator, and the winding is connected to a power supply. Usually, the winding is connected to a circuit board, and the circuit board is then connected to an external power supply. The magnitude and direction of the winding current are controlled through the circuit board, and the magnetic field generated by the winding is used to drive the rotor to rotate. The rotor includes a rotor seat 10 and a first magnet 11 arranged on the rotor seat 10. Specifically, a card slot 13 is provided on the rotor seat 10, and the first magnet 11 is clamped in the card slot 13 and further fixed by an adhesive. The first magnet 11 is arranged in cooperation with the winding, and the rotor seat 10 is rotatably mounted on the stator, that is, the arrangement of the first magnet 11 enables the winding to drive the first magnet 11 to rotate when energized. These have been introduced in existing motors and will not be described in detail here.

[0034] In the present invention, it further includes a plurality of second magnets 30 that cooperate with the first magnet 11, that is, the first magnet 11 and the second magnet 30 can attract or repel each other. The second magnets 30 are arranged around the central axis of the stator. One end of the second magnet 30 is connected to the stator through a first elastic member 31, and the other end of the second magnet 30 is connected to the stator through a second elastic member 32. The second magnet 30 is movably mounted on the stator through the first elastic member 31 and the second elastic member 32.

[0035] As a preferred embodiment of the present invention, the stator is provided with a mounting groove 24. The mounting groove 24 is in the shape of a cuboid and has a first groove wall 241 and a second groove wall 242 arranged along the radial direction of the stator. The first elastic member 31 is connected to the first groove wall 241, and the second elastic member 32 is connected to the second groove wall 242. The second magnet 30 is suspended in the mounting groove 24, and the connection line of the first elastic member 31, the second magnet 30, and the second elastic member 32 is in the radial direction of the stator.

[0036] As a preferred embodiment of the present invention, both the first elastic member 31 and the second elastic member 32 are springs, and the ends of the springs can be fixed to the groove walls of the mounting groove 24 and the second magnet 30 by welding.

[0037] As a preferred embodiment of the present invention, there are eight second magnets 30, and the eight second magnets 30 are evenly arranged along the circumferential direction of the stator.

[0038] As a preferred embodiment of the present invention, the stator includes a housing 21 and a stator core 22 disposed in the housing 21. The stator core 22 is installed on the housing 21 by interference fit. The stator core 22 is provided with a plurality of stator teeth 23 arranged along the circumferential direction, and the winding is wound around the stator teeth 23.

[0039] As a preferred embodiment of the present invention, the housing 21 includes a cylinder 213 and a first end cover 211 and a second end cover 212 disposed at both axial ends of the cylinder 213. The cylinder 213 is in a cylindrical shape. The stator core 22 is installed in the cylinder 213, and the rotor seat 10 is rotatably installed on the first end cover 211 and the second end cover 212 through a rotating shaft 12, and can be specifically locked to the cylinder 213 by screws. Bearing seats 14 are provided on both the first end cover 211 and the second end cover 212, and corresponding bearings 15 are provided at the ends of the rotating shaft 12.

[0040] As a preferred embodiment of the present invention, both the first magnet 11 and the second magnet 30 are magnetic steels. There are a plurality of first magnets 11, and the plurality of first magnets 11 are arranged along the circumferential direction of the rotor seat 10.

[0041] As a preferred embodiment of the present invention, the sizes or magnetic properties of the second magnets 30 are not all the same, so that the second magnets 30 are differentially arranged to form various vibration effects.

[0042] As a preferred embodiment of the present invention, the elastic coefficients of the first elastic members 31 are not all the same, and the elastic coefficients of the second elastic members 32 are not all the same, so that the second magnets 30 can be differentially arranged to enrich the tactile experience.

[0043] The product form of the present invention is not limited to the embodiments of this case. Any person who makes appropriate changes or modifications to it with a similar idea should be regarded as not departing from the patent scope of the present invention.

Claims

1. A vibration motor, comprising a stator and a rotor rotatably disposed in the stator. A winding is provided in the stator. The rotor includes a rotor seat and a first magnet disposed on the rotor seat. The first magnet is arranged in cooperation with the winding. The rotor seat is rotatably mounted on the stator, and is characterized in that: It further includes a plurality of second magnets cooperating with the first magnet. The second magnets are arranged around the central axis of the stator. One end of each second magnet is connected to the stator through a first elastic member, and the other end of each second magnet is connected to the stator through a second elastic member. The second magnets are movably mounted on the stator through the first elastic members and the second elastic members.

2. The vibrating motor according to claim 1, characterized in that: An installation groove is provided on the stator. The installation groove has a first groove wall and a second groove wall arranged along the radial direction of the stator. The first elastic member is connected to the first groove wall, and the second elastic member is connected to the second groove wall. The second magnets are suspended in the installation groove.

3. A vibration motor as claimed in claim 2, characterized in that: Both the first elastic member and the second elastic member are springs.

4. The vibrating motor according to claim 3, wherein: There are eight second magnets, and the eight second magnets are evenly arranged along the circumferential direction of the stator.

5. A vibration motor according to claim 4, characterized in that: The stator includes a housing and a stator core arranged in the housing. A plurality of stator teeth arranged along the circumferential direction are provided on the stator core, and the windings are wound around the stator teeth.

6. The vibration motor according to claim 5, wherein: The housing includes a cylinder body, a first end cover and a second end cover arranged at both axial ends of the cylinder body. The stator core is installed in the cylinder body, and the rotor seat is rotatably mounted on the first end cover and the second end cover through a rotating shaft.

7. The vibrating motor according to claim 6, wherein: Both the first magnet and the second magnet are permanent magnets. There are a plurality of first magnets, and the plurality of first magnets are arranged along the circumferential direction of the rotor seat.

8. A vibration motor as claimed in claim 7, wherein: The sizes or magnetic properties of the second magnets are not all the same.

9. A vibration motor according to claim 8, characterized in that: The elastic coefficients of the first elastic members are not all the same, and the elastic coefficients of the second elastic members are not all the same.

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