Swinging vibration motor

Abstract

The utility model relates to the technical field of swing vibration motors, and discloses a swing vibration motor, which comprises a rectangular shell with an opening at one end, a cover body, a stator assembly, a rotor assembly and a fixed shaft, the shell and the cover body are matched and buckled to form an accommodating space, the stator assembly, the rotor assembly and the fixed shaft are accommodated in the accommodating space, and the fixed shaft is arranged in the accommodating space. The stator assembly comprises a flexible circuit board and a coil, the fixed shaft and the flexible circuit board are fixed on the inner surface of the cover body, the coil is fixed on the inner surface of the shell, the whole rotor assembly is a cuboid, and the motor further comprises springback mechanisms fixedly arranged at the two ends of the short edge of the rotor assembly. The springback mechanism comprises a fixed part which is connected and fixed to the end face of the short edge of the rotor assembly and an elastic limiting part which bends and extends from one end of the fixed part to the long edges of the two sides of the rotor assembly. The swing vibration motor is novel in structure, more diversified vibration modes of the swing vibration motor can be realized, and the vibration sense is stronger.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration motors, and particularly relates to a swinging vibration motor. Background Art

[0002] With the development of electronic technology, portable consumer electronic products have gradually occupied the global consumer market, such as mobile phones, handheld game consoles, multimedia entertainment devices, etc. These electronic products generally use swinging vibration motors for haptic feedback, such as incoming call reminders on mobile phones, vibration feedback on game consoles, etc. If such a wide range of applications are to be satisfied, the requirements for the vibration performance of vibration motors are getting higher and higher.

[0003] Existing vibration motors usually have surface-mounted columnar vibration motors. The eccentric weights provided on the rotating shaft rotate at high speed under the driving force of the motor. However, the vibration mode of the surface-mounted columnar vibration motor is single, and the vibration feeling experience obtained by customers is also relatively single. Therefore, it is necessary to provide a vibration motor with more diverse vibration modes and stronger vibration feeling. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a swinging vibration motor with more diverse vibration modes and stronger vibration feeling, and its specific technical solution is as follows:

[0005] A swinging vibration motor includes a rectangular shell with one end open, a cover body, a stator assembly, a rotor assembly and a fixed shaft. The shell and the cover body are fitted and buckled to form an accommodating space. The stator assembly, the rotor assembly and the fixed shaft are accommodated in the accommodating space. The stator assembly includes a flexible circuit board and a coil. The fixed shaft and the flexible circuit board are fixed on the inner surface of the cover body, and the coil is fixed on the inner surface of the shell. The rotor assembly is integrally in a cuboid shape, and further includes a rebound mechanism fixedly arranged at both ends of the short side of the rotor assembly. The rebound mechanism includes a fixing part connected and fixed to the end face of the short side of the rotor assembly and an elastic limiting part bent and extending from one end of the fixing part to the two long sides of the rotor assembly.

[0006] Preferably, the rotor assembly includes a cuboid mass block, a magnet and a sliding bearing; a first mounting hole penetrating through its axial thickness is arranged at the central position of the mass block, and second mounting holes symmetrically located on both sides of the first mounting hole and penetrating through the axial thickness of the mass block; the sliding bearing is embedded in the first mounting hole, and the magnet is embedded in the second mounting hole.

[0007] Preferably, at least two fixing columns are integrally and symmetrically convexly provided on both short side end faces of the mass block.

[0008] Preferably, the rebound mechanism is a metal sheet structure formed by integral stamping, and the fixing part is provided with a third mounting hole corresponding to the fixing column.

[0009] Preferably, the axial height of the elastic limiting portion is less than or equal to the height of the fixing portion; the axial height of the fixing portion is less than or equal to the thickness of the mass block; the short side width of the mass block is greater than the width of the fixing portion.

[0010] Preferably, the housing includes a rectangular bottom wall and side walls that are bent and extended in the same direction from the four side edges of the bottom wall.

[0011] Preferably, two coils are provided and are respectively fixed to the inner walls of the long sides of the side walls diagonally opposite, and the coils are respectively adapted to the magnets.

[0012] Preferably, damping sheets are provided at the four corners of the long side of the mass block corresponding to the inner wall of the long side of the side wall, and the damping sheet closer to the coil side is located between the coil and the inner wall of the short side of the side wall.

[0013] Preferably, the elastic limiting portion extends between the mass block and the damping sheet.

[0014] Preferably, the elastic limiting portion is provided in a V shape or a U shape.

[0015] Compared with the prior art, the utility model not only has a novel structure, but also can realize more diverse vibration modes of the swing vibration motor and has a stronger vibration feeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an exploded view of the structure of the first embodiment of the swing vibration motor.

[0017] Figure 2 is an exploded view of the rotor assembly and the resilience mechanism of the first embodiment.

[0018] Figure 3 is an assembled plan view of the rotor assembly, the coil, the damping sheet and the housing of the first embodiment.

[0019] Figure 4 is a cross-sectional view of the XY plane of the resilience mechanism of the second embodiment.

[0020] Wherein:

[0021] 1 - housing: 11 - side wall:

[0022] 2 - cover body; 20 - shaft fixing portion;

[0023] 3 - stator assembly; 30 - flexible circuit board; 31 - coil;

[0024] 4 - rotor assembly; 40 - mass block; 41 - magnet; 42 - sliding bearing;

[0025] 400 - First mounting hole; 401 - Second mounting hole; 402 - Fixed column;

[0026] 5 - Fixed shaft:

[0027] 6 - Spacer:

[0028] 7 - Slide piece;

[0029] 8 - Damping piece: 9 - Rebound mechanism; 90 - Fixed part; 900 - Third mounting hole; 91 - Elastic limiting part. Detailed implementation manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] The structure of a swing vibration motor according to the first embodiment of the present invention is as Figures 1 to 3 shown, including a rectangular housing 1 with an open end, a cover 2, a stator assembly 3, a rotor assembly 4, and a fixed shaft 5. The housing 1 and the cover 2 are fitted and fastened to form a receiving space (not marked). The stator assembly 3, the rotor assembly 4, and the fixed shaft 5 are accommodated in the receiving space. Among them, the X direction in the specification drawings is the horizontal long side direction of the swing vibration motor, the Y direction is the horizontal short side direction, and the Z direction is the axial height direction. The housing 1 includes a rectangular bottom wall (not marked) and side walls 11 bent and extended in the same direction from the four side edges of the bottom wall. The side walls 11 and the cover 2 are joined to form the receiving space. The stator assembly 3 includes a flexible circuit board 30 and a coil 31. One end of the flexible circuit board 3 is located in the receiving space, and the other end extends out of the receiving space to connect to an external power supply. The coil 31 is electrically connected to one end of the flexible circuit board 3 in the receiving space. The fixed shaft 5 and the flexible circuit board 30 are fixed on the inner surface of the cover 2, and the coil 31 is fixed on the inner surface of the housing 1. Specifically, a shaft fixing portion 20 protrudes from the central position of the cover 2, and the fixed shaft 5 is fixed in the shaft fixing portion 20 to enhance the bonding force between the fixed shaft 5 and the cover 2. The rotor assembly 4 is generally rectangular parallelepiped. Rebound mechanisms 9 are fixedly arranged at both ends of the short sides of the rotor assembly 4. The rebound mechanism 9 is a metal sheet structure formed by integral stamping. The rebound mechanism 9 includes a flat fixed portion 90 connected and fixed to the end faces of the two short sides of the rotor assembly 4 and elastic limiting portions 91 bent and extended from one end of the fixed portion 90 toward the two long sides of the rotor assembly 4, which are used for the limiting and rebounding of the rotor assembly 4.

[0032] The rotor assembly 4 includes a cuboid mass block 40, a magnet 41, and a sliding bearing 42; a first mounting hole 400 penetrating through its axial thickness is provided at the central position of the mass block 40, and second mounting holes 401 symmetrically located on both sides of the first mounting hole 400 and penetrating through the axial thickness of the mass block 40; the sliding bearing 42 is embedded in the first mounting hole 400, and the rotor assembly 4 rotates around the fixed shaft 5 between the sliding bearings 42. The axial ends of the sliding bearings 42 protrude from the upper and lower surfaces of the mass block 40 to prevent the mass block 40 from rubbing against the housing 1 and the cover 2 during the rotation of the rotor assembly 4, and to avoid the swing vibration motor generating noise and affecting its service life. The magnet 41 is embedded in the second mounting hole 401, and the upper and lower side surfaces of the magnet 41 are flush with the upper and lower surfaces of the mass block 40 to ensure the symmetry of the magnetic circuit and the magnetic field saturation of the swing vibration motor. Preferably, at least two fixing columns 403 are integrally protruded from the short side end faces on both sides of the mass block 40, and the fixing part 90 of the return spring mechanism 9 is correspondingly provided with a third mounting hole 900 for the fixing columns 403. The mass block 40 and the return spring mechanism 9 are fixed by inserting the fixing columns 403 into the third mounting holes 900 and welding; the axial height of the elastic limiting part 91 is less than or equal to the height of the fixing part 90 to ensure the resilience of the elastic limiting part 91; the axial height of the fixing part 90 is less than or equal to the thickness of the mass block 49. At the same time, the short side width of the mass block 40 is greater than the width of the fixing part 90 to prevent the return spring mechanism 9 from rubbing against the housing 1 and the cover 2 during the rotation of the rotor assembly 4, prevent the return spring mechanism 9 from deforming, and avoid the swing vibration motor generating noise, thereby optimizing the service life and vibration performance of the swing vibration motor.

[0033] The coils 31 of the stator assembly 3 are provided in two and are respectively fixed to the inner walls diagonally opposite to the long sides of the side wall 11. The coils 31 are respectively adapted to the magnets 41, so as to realize the mutual attraction and repulsion between the magnetic fields generated by the energization of the coils 31 and the magnets 41, thereby enabling the reciprocating rotation of the rotor assembly 4. Preferably, a sliding piece 7 is provided on the upper end surface of the sliding bearing 42, and the sliding piece 7 is located between the fixed shaft 5 and the bottom wall 10 to avoid direct friction between the sliding bearing 42 and the bottom wall 1O and ensure the service life of the sliding bearing 42. A gasket 6 is provided between the lower end surface of the sliding bearing 42 and the shaft fixing part 20 to adjust the axial clearance of the rotor assembly 4 on the fixed shaft 5 and avoid direct friction between the sliding bearing 42 and the shaft fixing part 20 of the cover 2 to ensure the service life of the sliding bearing 42. The settings of the gasket 6 and the sliding piece 7 can jointly optimize the vibration performance of the swing vibration motor; damping sheets 8 are provided at the four corner positions of the long sides of the mass block 40 corresponding to the long side inner wall of the side wall 11. The damping sheets 8 can prevent the elastic limiting part 91 from directly hitting the side wall and causing the deformation of the return spring mechanism 9; the damping sheet 8 on one side of the coil 31 is located between the coil 31 and the short side inner wall of the side wall 11, and the elastic limiting part 91 is bent and extended between the mass block 40 and the damping sheet 8 to realize the limiting and rebounding effects of the return spring mechanism 9 on the rotor assembly 4 between the two long side walls 11 of the housing 1.

[0034] In the second embodiment of the present utility model for the rebound mechanism 9 of the swing vibration motor, on the basis of the first embodiment, the elastic limiting portion 91 is set to be V-shaped or U-shaped to increase the elasticity of the elastic limiting portion 91, and the resilience of the rebound mechanism 9 can be optimized.

[0035] The working principle of a swing vibration motor of the present utility model is as follows:

[0036] The swing vibration motor uses a square-wave current. During the process of switching the current, the magnetic field generated by the energized coil 31 and the magnet 41 attract and repel each other, causing the rotor assembly 4 to rotate reciprocally to output a vibration sensation; the elastic limiting portions 91 located at the four corners of the mass block 40 stop and limit the rotation of the rotor assembly 4 and provide a resilience to restore the initial state of the rotor assembly 4.

[0037] When the coil 31 is not energized, the rotor assembly 4 is held at the initial middle position of the accommodation space by the elastic limiting portions 91 at its four corners:

[0038] When the coil 31 is energized, the magnet 41 and the coil 31 attract each other, and the rotor assembly 4 starts to rotate. When the elastic limiting portions 91 located diagonally on the rotor assembly 4 touch the damping piece 8 near the coil 31, the current direction is switched, and the magnet 41 and the coil 31 repel each other. Coupled with the elastic collision of the elastic limiting portion 91, the rotor assembly 4 is rebounded and rotated back; according to this working principle, when the elastic limiting portion 91 located at the other diagonal of the rotor assembly 4 touches the damping piece 8 far from the coil 31, the current direction is switched, and the magnet 41 and the coil 31 become attractive; during the process of attraction and repulsion between the magnet 41 and the coil 31, the rotor assembly 4 rotates reciprocally, and the setting of the mass block 40 generates a strong vibration, allowing the user to feel a very high-quality vibration feedback.

[0039] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "horizontal direction", "vertical direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0040] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A swing vibration motor, comprising a rectangular shell with an opening at one end, a cover, a stator assembly, a rotor assembly and a fixed shaft, wherein the shell and the cover are adapted to be buckled to form an accommodation space, wherein the stator assembly, the rotor assembly and the fixed shaft are accommodated in the accommodation space, wherein the stator assembly comprises a flexible circuit board and a coil, wherein the fixed shaft and the flexible circuit board are fixed on the inner surface of the cover, wherein the coil is fixed on the inner surface of the shell, wherein the rotor assembly is a rectangular parallelepiped as a whole, and wherein: It also includes a rebound mechanism fixedly arranged at both ends of the short side of the rotor assembly, and the rebound mechanism includes a fixing part connected and fixed to the end surface of the short side of the rotor assembly and an elastic limiting part bent and extended from one end of the fixing part to the long sides of both sides of the rotor assembly.

2. The swing vibration motor according to claim 1, characterized in that: The rotor assembly includes a rectangular mass block, a magnet and a sliding bearing; a first mounting hole is provided at the center of the mass block and penetrates its axial thickness, and second mounting holes are symmetrically located on both sides of the first mounting hole and penetrate the axial thickness of the mass block; the sliding bearing is embedded in the first mounting hole, and the magnet is embedded in the second mounting hole.

3. The swing vibration motor according to claim 2, characterized in that: At least two fixing columns are symmetrically protruded from the short side end surfaces of both sides of the mass block.

4. The swing vibration motor according to claim 3, characterized in that: The rebound mechanism is an integrally stamped sheet metal structure, and the fixing portion is adapted to be provided with a third mounting hole corresponding to the fixing column.

5. The swing vibration motor according to claim 4, characterized in that: The axial height of the elastic limiting portion is less than or equal to the height of the fixing portion; the axial height of the fixing portion is less than or equal to the thickness of the mass block; and the short side width of the mass block is greater than the width of the fixing portion.

6. The swing vibration motor according to claim 5, characterized in that: The shell comprises a rectangular bottom wall and side walls which are bent and extended in the same direction from four side edges of the bottom wall.

7. The swing vibration motor according to claim 6, characterized in that: The coils are provided in two pieces and are respectively fixed to the inner walls obliquely opposite to the long sides of the side walls, and the coils are respectively matched with the magnets.

8. The swing vibration motor according to claim 7, characterized in that: Damping plates are arranged on the inner wall of the long side of the side wall corresponding to the four corners of the long side of the mass block, and the damping plate close to the coil is located between the coil and the inner wall of the short side of the side wall.

9. The swing vibration motor according to claim 8, characterized in that: The elastic limiting portion extends and is located between the mass block and the damping sheet.

10. The swing vibration motor according to claim 1, characterized in that: The elastic limiting portion is configured to be V-shaped or U-shaped.

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