Oscillating vibration motor

Abstract

The utility model discloses a swing vibration motor, including upper shell, apron, stator subassembly, rotor subassembly and fixed axle, upper shell and apron buckle and form the accommodation space, and rotor subassembly is spaced apart in the accommodation space in stator subassembly, and rotor subassembly includes vane shape balance weight, and the balance weight includes the integral casting forming's sector and handle portion, and the sector vertical embedding first magnet, and the handle portion horizontal embedding second magnet, and stator subassembly includes flexible circuit board, coil and two interval settings's polarity opposite's third magnet and fourth magnet, and coil and first magnet upper and lower interval corresponding arrangement, and the handle portion interval is located between third magnet and fourth magnet, and second magnet respectively with its corresponding third magnet and fourth magnet's opposite face magnetic pole is same, and through second magnet respectively with its corresponding third magnet and fourth magnet mutual repulsion forms the magnetic spring, to realize the reset of rotor subassembly.

Description

Technical Field

[0001] This utility model relates to the field of vibration motor technology, and in particular to an oscillating vibration motor. Background Technology

[0002] With the development of electronic technology, portable consumer electronics products have gradually occupied the global consumer market, such as mobile phones, handheld game consoles, and multimedia entertainment devices. These electronic products generally use vibration motors for haptic feedback, such as incoming call notifications on mobile phones and vibration feedback on game consoles. To meet the needs of such a wide range of applications, the vibration performance requirements for vibration motors are becoming increasingly stringent.

[0003] Existing oscillating vibration motors typically achieve rotor reset using traditional torsion springs or leaf springs. Traditional springs are mainly made of metal, have a simple structure, and are low in cost; however, after long-term use, they may experience metal fatigue, leading to problems such as relaxation deformation and fatigue fracture. Therefore, it is necessary to provide a vibration motor with a fast response speed and rotor reset without mechanical friction wear. Utility Model Content

[0004] The purpose of this utility model is to provide an oscillating vibration motor with no mechanical friction and wear and a fast response speed. The specific technical solution is as follows:

[0005] A oscillating vibration motor includes an upper housing, a cover plate, a stator assembly, a rotor assembly, and a fixed shaft. The upper housing and the cover plate are fastened together to form an accommodating space. The stator assembly and the fixed shaft are fixed to the cover plate. The rotor assembly is sleeved on the fixed shaft and rotates around it. The rotor assembly and the stator assembly are spaced apart within the accommodating space. The rotor assembly includes a blade-shaped balance block. The balance block includes an integrally cast fan-shaped portion and a handle portion. A first magnet is vertically embedded in the fan-shaped portion, and a second magnet is horizontally embedded in the handle portion. The stator assembly includes a flexible circuit board, a coil, and two spaced-apart third and fourth magnets with opposite polarities. The coil and the first magnet are vertically spaced and correspondingly arranged. The handle portion is spaced between the third and fourth magnets. The second magnet has the same magnetic poles on the opposite sides of its corresponding third and fourth magnets.

[0006] Preferably, the fan-shaped portion of the balance block vertically penetrates a first mounting hole through its thickness; the handle portion horizontally penetrates a second mounting hole through its width; and the connection position between the fan-shaped portion and the handle portion vertically penetrates a through hole through its thickness.

[0007] Preferably, the center line connecting the through hole, the first mounting hole, and the second mounting hole is on the same straight line, and the rotor assembly is symmetrically arranged with respect to the center line.

[0008] Preferably, the rotor assembly further includes a sliding bearing integrally cast in the through hole, the rotor assembly being sleeved on the fixed shaft via the sliding bearing, and the height of the sliding bearing being greater than the thickness of the balance block.

[0009] Preferably, the first magnet is embedded in the first mounting hole, and the height of the first magnet is equal to the thickness of the balance block.

[0010] Preferably, the second magnet is embedded in the second mounting hole, and the width of the second magnet is equal to the width of the handle.

[0011] Preferably, there are two coils.

[0012] Preferably, the cover plate includes a circular body and a support extending integrally from the body, a fixing part protruding from the center of the body, and the fixing shaft fixed in the fixing part.

[0013] Preferably, a sliding plate is provided between the upper shell and the fixed shaft.

[0014] Preferably, a shim is provided between the sliding bearing and the fixed part, and the shim is sleeved on the fixed shaft.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: by having the second magnet and its corresponding third and fourth magnets have the same magnetic poles on opposite sides to form mutually repulsive magnetic springs, the rotor assembly can be reset. This has the advantages of no mechanical friction and wear, no noise and long service life. At the same time, the magnetic spring has no hysteresis in its force and displacement curve, and the response speed is fast. Attached Figure Description

[0016] Figure 1 This is a 3D view of the assembly of a swing vibration motor.

[0017] Figure 2 This is an exploded view of the rotor assembly.

[0018] Figure 3 This is an exploded view of the structure of a swing vibration motor.

[0019] Figure 4 It is a three-dimensional view of the stator assembly and rotor assembly assembly.

[0020] Figure 5 It is along Figure 4 Cross-sectional view of the BB line.

[0021] in:

[0022] 1-Upper shell; 2-Cover plate; 20-Fixing part; 21-Support body; 3-Rotor assembly; 30-Balance block; 300-Through hole; 301-First mounting hole; 302-Second mounting hole; 31-First magnet; 32-Sliding bearing; 33-Second magnet; 4-Stator assembly; 40-Flexible circuit board; 41-Coil; 43-Third magnet; 44-Fourth magnet; 5-Fixing shaft; 6-Shim; 7-Sliding plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model discloses a swing vibration motor, such as Figures 1 to 5 As shown, the device includes an upper shell 1, a cover plate 2, a rotor assembly 3, a stator assembly 4, and a fixed shaft 5. The upper shell 1 is a cylinder with one open end and an accommodating space (not shown). The cover plate 2 includes a circular body (not shown) and a support body 21 integrally extending from the body. A fixing part 20 protrudes from the center of the body, and the fixed shaft 5 is fixed within the fixing part 20. The upper shell 1 and the cover plate 2 are fastened together to form a closed accommodating space. The stator assembly 4 and the fixed shaft 5 are fixed to the cover plate 2. The rotor assembly 3 is sleeved on the fixed shaft 5 and rotates around it. The rotor assembly 3 and the stator assembly 4 are spaced apart within the accommodating space. (Instruction manual attached) Figure 1 In this context, X represents the horizontal direction parallel to the cover plate 2, and Z represents the vertical direction of the motor parallel to the fixed shaft 5.

[0025] The rotor assembly 3 includes an integrally cast blade-shaped balance block 30, a first magnet 31, a sliding bearing 32, and a second magnet 33. The balance block 30 includes an integrally cast sector (not shown), a handle (not shown), a through hole 300 located at the connection between the sector and the handle, a first mounting hole 301 that vertically penetrates the thickness of the balance block, and a second mounting hole 302 that horizontally penetrates the width of the handle. The through hole 300 vertically penetrates the thickness of the balance block 30. The sliding bearing 32 is integrally cast in the through hole 300. The first magnet 31 is vertically embedded in the first mounting hole 301 of the sector. The second magnet 33 is horizontally embedded in the second mounting hole 302 of the handle. Specifically, the height of the first magnet 31 is equal to the thickness of the balance block 30 to prevent the first magnet 31 from protruding from the upper and lower surfaces of the balance block 30 and causing friction and collision with the upper shell 1 and the cover plate 2; the height of the sliding bearing 32 is greater than the thickness of the balance block 30 to prevent the upper and lower surfaces of the balance block 30 from directly rubbing and colliding with the upper shell 1 and the cover plate 2; the width of the second magnet 33 is equal to the width of the handle to prevent the second magnet 33 from protruding from the horizontal sides of the handle and directly rubbing and colliding with the third magnet 43 and the fourth magnet 44 on both sides; the rotor assembly 3 is sleeved on the fixed shaft 5 through the sliding bearing, and the horizontal width of the fan-shaped part is large. The width of the handle forms an eccentrically positioned balance block 30. When the rotor assembly 3 reciprocates around the fixed shaft 5, the eccentric balance block 30 generates vibration. The integrally cast rotor assembly 3 can improve production efficiency. Multiple parts can be assembled in the same process, avoiding dimensional errors and deformation caused by multiple processing, and improving the production yield of the rotor assembly 3. The center line connecting the through hole 300, the first mounting hole 301 and the second mounting hole 302 (not shown) is on the same straight line. The rotor assembly 3 is symmetrically arranged with respect to the center line, so that the rotor assembly 3 maintains balance during reciprocating motion, ensuring the stability of the vibration motor.

[0026] The stator assembly includes a flexible circuit board 40, a coil 41, and two spaced-apart third magnets 43 and fourth magnets 44 with opposite polarities. The flexible circuit board 40 includes a circular inner power terminal (not shown) and an outer power terminal (not shown) that extends integrally from the inner power terminal and provides an accommodating space. The coils 41 are fixedly mounted on the inner power terminals on the side away from the outer power terminals. The third magnets 43 and fourth magnets 44 are fixedly mounted on the inner power terminals on the side adjacent to the outer power terminals. The center of the inner power terminal has a cutout (not shown) to accommodate the fixing part 20. The height of the fixing part 20 is greater than the height of the coils 41.

[0027] The assembly steps of the swing vibration motor of this utility model are as follows: first, fix the fixed shaft 5 on the fixed part 20 of the cover 2; then fix the stator assembly 4 on the cover 2; then put the rotor assembly 3 on the fixed shaft 5; finally, fasten and weld the upper shell 1 and the cover 2 together.

[0028] The coil 41 of the assembled swing vibration motor is vertically spaced and correspondingly positioned to the first magnet 31. The handle is positioned between the third magnet 43 and the fourth magnet 44. The second magnet 32, horizontally embedded in the handle, has the same magnetic poles on its opposite surfaces as its corresponding third magnet 43 and fourth magnet 44, forming a repulsive magnetic spring. This swing vibration motor generates a magnetic field by switching the current direction of the two input coils 41, which attracts and repels the second magnet 32, causing the rotor assembly 3 to rotate reciprocally. Vibration is generated by the eccentric balance block 30. When the coils 41 are not energized or are de-energized, the second magnet 32, with the same magnetic poles on its opposite surfaces as its corresponding third magnet 43 and fourth magnet 44, generates a repulsive force, allowing the rotor assembly 3 to remain in its initial centered position and to reset. The magnetic spring has advantages such as no mechanical friction or wear, no noise, and long lifespan. Furthermore, theoretically, the magnetic spring exhibits no hysteresis in its force-displacement curve, resulting in a fast reset response. Preferably, a sliding plate 7 is provided between the upper shell 1 and the fixed shaft 5 to prevent collision and friction between the sliding bearing 32 and the upper shell 1, thereby preventing noise generation and wear of the rotor assembly 3; a shim 6 is provided between the sliding bearing 32 and the fixed part 20, and the shim 6 is sleeved on the fixed shaft 5 to adjust the height of the distance between the rotor assembly 3 and the stator assembly, while preventing collision and friction between the sliding bearing 32 and the fixed part 20, preventing noise generation and wear of the rotor assembly 3, thereby improving the service life of the rotor assembly 3 and ensuring the vibration performance of the vibration motor.

[0029] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "horizontal direction", "vertical direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A oscillating vibration motor, comprising an upper housing, a cover plate, a stator assembly, a rotor assembly, and a fixed shaft, wherein the upper housing and the cover plate are fastened together to form an accommodating space, the stator assembly and the fixed shaft are fixed to the cover plate, the rotor assembly is sleeved on the fixed shaft and rotates around it, and the rotor assembly and the stator assembly are spaced apart within the accommodating space, characterized in that, The rotor assembly includes a blade-shaped balance block, which includes an integrally cast fan-shaped portion and a handle portion. A first magnet is vertically embedded in the fan-shaped portion, and a second magnet is horizontally embedded in the handle portion. The stator assembly includes a flexible circuit board, a coil, and two spaced-apart third and fourth magnets with opposite polarities. The coil and the first magnet are vertically spaced and correspondingly arranged. The handle portion is spaced between the third and fourth magnets. The second magnet has the same magnetic poles on the opposite sides of its corresponding third and fourth magnets.

2. The oscillating vibration motor according to claim 1, characterized in that, The fan-shaped portion of the balance block has a first mounting hole that extends vertically through its thickness; the handle has a second mounting hole that extends horizontally through its width; and the connection point between the fan-shaped portion and the handle has a through hole that extends vertically through its thickness.

3. The oscillating vibration motor according to claim 2, characterized in that, The center line connecting the through hole, the first magnet, and the second magnet is on the same straight line, and the rotor assembly is symmetrically arranged with respect to the center line.

4. The oscillating vibration motor according to claim 3, characterized in that, The rotor assembly also includes a sliding bearing integrally cast into the through hole. The rotor assembly is sleeved on the fixed shaft through the sliding bearing, and the height of the sliding bearing is greater than the thickness of the balance block.

5. The oscillating vibration motor according to claim 3, characterized in that, The first magnet is embedded in the first mounting hole, and the height of the first magnet is equal to the thickness of the balance block.

6. The oscillating vibration motor according to claim 3, characterized in that, The second magnet is embedded in the second mounting hole, and the width of the second magnet is equal to the width of the handle.

7. The oscillating vibration motor according to claim 1, characterized in that, There are two coils.

8. The oscillating vibration motor according to claim 7, characterized in that, The cover plate includes a circular body and a support extending integrally from the body. A fixing part protrudes from the center of the body, and the fixing shaft is fixed inside the fixing part.

9. The oscillating vibration motor according to claim 8, characterized in that, A sliding plate is provided between the upper shell and the fixed shaft.

10. The oscillating vibration motor according to claim 9, characterized in that, A shim is provided between the sliding bearing and the fixed part, and the shim is sleeved on the fixed shaft.

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