Swinging vibration motor

Abstract

The utility model relates to the technical field of vibration motors, and discloses a swing vibration motor, which comprises a shell, a cover body, a stator assembly, a rotor assembly and a fixed shaft, the shell and the cover body are 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 electrically connected with the flexible circuit board, 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 arranged on the fixing shaft in a sleeving mode and rotates around the fixing shaft, the rotor assembly comprises a support which is integrally formed in a punching mode, and the support comprises a square body and four springback parts which are bent and extend from the edges of the two sides of the four corners of the body to form the four spaced and symmetrical springback parts. 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 swing 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 vibration motors for tactile feedback, such as incoming call notifications on mobile phones, vibration feedback on game consoles, etc. To meet such a wide range of applications, the requirements for the vibration performance of vibration motors are getting higher and higher.

[0003] Existing vibration motors usually include surface-mounted columnar vibration motors or flat 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 swing vibration motor with more diverse vibration modes and stronger vibration feeling, and its specific technical solution is as follows:

[0005] A swing vibration motor includes a housing, a cover, a stator assembly, a rotor assembly, and a fixed shaft. The housing and the cover are 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 electrically connected to the flexible circuit board. The fixed shaft and the flexible circuit board are fixed on the inner surface of the cover, and the coil is fixed on the inner surface of the housing. The rotor assembly is sleeved on the fixed shaft and rotates around it. The rotor assembly includes a bracket formed by integral stamping. The bracket includes a square body and four spaced and symmetrically rebounding portions bent and extended from the two side edges of the four corners of the body.

[0006] Preferably, the rotor assembly further includes a mass block adapted to the shape of the body, a first mounting hole penetrating the center position of the mass block, second mounting holes symmetrically located on both sides of the first mounting hole and penetrating the mass block, a sliding bearing embedded in the first mounting hole, and a magnet embedded in the second mounting hole. The body is provided with a third mounting hole corresponding to the first mounting hole and penetrating through it.

[0007] Preferably, the mass block is connected and fixed to the upper surface of the body. The rebounding portions protrude towards the side of the mass block, and the mass block is located between the rebounding portions. The mass block and the bracket are fixed on the sliding bearing.

[0008] Preferably, the resilient portion is arranged in a V shape, a U shape or an S shape.

[0009] Preferably, the axial height of the resilient portion is less than or equal to the thickness of the mass block; the axial thickness of the sliding bearing is greater than the thickness of the mass block; the axial thickness of the magnet is equal to the thickness of the mass block; the fixed shaft protrudes from the end face of the sliding bearing toward one side of the housing.

[0010] Preferably, the housing includes a square bottom wall and side walls perpendicularly bent and extended in the same direction from the four side edges of the bottom wall; a circular limiting portion protrudes from the central position of the inner surface of the bottom wall.

[0011] Preferably, two coils are provided and are adapted to the magnet; the coils are fixed to the inner surface of the side wall and are symmetrically located at the diagonal corners of the housing.

[0012] Preferably, a damping member is provided on the inner surface of the side wall corresponding to the resilient portion.

[0013] Preferably, the fixed shaft is limited within the limiting portion, a circular sliding piece is provided between the limiting portion and the fixed shaft, and the area of the sliding piece is larger than the end area of the sliding bearing.

[0014] Preferably, a fixing portion protrudes from the center of the cover body, the fixed shaft is fixed within the fixing portion, and a gasket is provided between the fixing portion and the sliding bearing.

[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 swing vibration motor of the utility model.

[0017] Figure 2 is a cross-sectional view of the swing vibration motor of the utility model in the plane where the Y-Z direction is located.

[0018] Figure 3 is an exploded view of the structure of the swing vibration motor of the utility model with the cover plate and the flexible circuit board removed.

[0019] Figure 4A is a cross-sectional view of the swing vibration motor of the utility model in the plane where the X-Y direction is located in the initial state.

[0020] Figure 4B is the actuation state diagram of 4A.

[0021] Wherein:

[0022] 1 - housing; 10 - bottom wall; 11 - side wall; 100 - limiting portion;

[0023] 2 - Cover body; 20 - Fixed part;

[0024] 3 - Stator assembly; 30 - Flexible circuit board; 31 - Coil;

[0025] 4 - Rotor assembly; 40 - Mass block; 400 - First mounting hole; 401 - Second mounting hole;

[0026] 41 - Magnet; 42 - Sliding bearing;

[0027] 43 - Bracket; 430 - Body; 431 - Rebound part; 432 - Third mounting hole;

[0028] 5 - Fixed shaft;

[0029] 6 - Spacer;

[0030] 7 - Slide piece;

[0031] 8 - Damping member. Detailed implementation manner

[0032] 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.

[0033] The structure of a swing vibration motor is as Figures 1 to 3 shown, including a square housing 1 with an open end, a plate - shaped cover body 2, a stator assembly 3, a rotor assembly 4, and a fixed shaft 5. Among them, the housing 1 includes a square bottom wall 10 and side walls 11 that are perpendicularly bent and extended in the same direction from the four - side edges of the bottom wall 10; a circular limiting portion 100 protrudes from the central position of the inner surface of the bottom wall 10, and the limiting portion 100 forms a groove - like shape; the side walls 11 are adapted to the cover body 2, and the housing 1 and the cover body 2 are snapped together to form an accommodation space (not marked), and the fixed shaft 5 is fixed on the inner surface of the cover body 2; the rotor assembly 4 is sleeved on the fixed shaft 5 and rotates around it; the stator assembly 3, the rotor assembly 4, and the fixed shaft 5 are accommodated in the accommodation space. Among them, the X - direction is the horizontal length direction of the swing vibration motor, the Y - direction is the horizontal width direction, and the Z - direction is the axial height direction.

[0034] The rotor assembly 4 includes a bracket 43 formed by integral stamping, a mass 40 fixed on the bracket 43, and a magnet 41 and a sliding bearing 42 embedded in the mass 40; wherein, the bracket 43 includes a square plate-shaped body 430 and four spaced and symmetrically rebounding portions 431 formed by bending and extending in the same direction from the two side edges at the four corners of the body 430. When the swinging vibration motor is not powered on, the rebounding portions 431 are used to maintain the rotor assembly 4 in the initial state; the shape of the mass 40 is adapted to the body 430, the mass 40 is fixed on the upper surface of the body 430, and the mass 40 and the bracket 43 are both fixed on the sliding bearing 42; the rebounding portions 431 are arranged in a V shape, a U shape or an S shape, and the rebounding portions 431 protrude towards the side of the mass 40, so that the mass 40 is located between the rebounding portions 431; a first mounting hole 400 is formed through the center position of the mass 40, second mounting holes 401 symmetrically located on both sides of the first mounting hole 400 and passing through the mass 40, a sliding bearing 42 embedded in the first mounting hole 400, and a magnet 41 embedded in the second mounting hole 401; a third mounting hole 432 is formed through the position of the body 430 corresponding to the first mounting hole 400; preferably, the axial thickness of the sliding bearing 42 is greater than the thickness of the mass 40 to prevent the mass 40 from hitting the housing 1 and the cover 2 during the reciprocating rotation, preventing noise generation and ensuring the service life of the housing 1 and the cover 2; the axial thickness of the magnet 41 is equal to the thickness of the mass 40 to ensure that the magnet 41 is fully embedded in the mass 40 and does not affect the magnetic field effect of the swinging vibration motor; the free end of the fixed shaft 5 on the side towards the housing 1 protrudes from the end face of the sliding bearing 42 and cooperates with the limiting portion 100 of the housing 1. The limiting portion 100 is provided corresponding to the fixed shaft 5, so that the free end of the fixed shaft 5 is limited in the housing 1, thereby ensuring the vibration stability of the swinging vibration motor. Preferably, a circular sliding piece 7 is provided between the limiting portion 100 and the fixed shaft 5, and the area of the sliding piece 7 is greater than the end area of the sliding bearing 42 to prevent the sliding bearing 42 from rubbing against the inner surface of the bottom wall 10 during the reciprocating rotation of the mass 40; the axial height of the rebounding portion 431 is less than or equal to the thickness of the mass 40 to prevent the rebounding portion 431 from rubbing against the inner surfaces of the bottom wall 10 and the cover 2 during the reciprocating rotation of the mass 40, preventing noise generation and ensuring the service life of the rebounding portion 431, the housing 1 and the cover 2; a damping member 8 is provided on the inner surface of the side wall 11 corresponding to the rebounding portion 431. The damping member 8 is made of an elastic material with a buffering effect, which helps the rebounding of the rebounding portion 431 and plays a buffering role, preventing the rebounding portion 431 from directly hitting the side wall 11 during the reciprocating rotation of the mass 40, preventing noise generation and ensuring that the rebounding portion 431 and the housing 1 are not easily deformed, thereby improving the vibration performance of the swinging vibration motor as a whole.

[0035] The stator assembly 3 includes a flexible circuit board 30 and a coil 31 electrically connected to the flexible circuit board 30. The flexible circuit board 30 is fixed on the inner surface of the cover body 2, and the coil 31 is fixed on the inner surface of the side wall 11 of the shell 1; the coil 31 is set in two and is adapted to the position of the magnet 41; the coil 31 is fixed to the inner surfaces of the two opposite side walls 11 and is symmetrically located at the diagonal corners of the shell 1.

[0036] A fixing portion 20 is convexly provided in the center of the cover body 2, and one end of the fixing shaft 5 is fixed in the fixing portion 20; a gasket 6 is provided between the fixing portion 20 and the sliding bearing 42 to adjust the axial clearance of the rotor assembly 4 in the accommodating space and prevent the sliding bearing 42 from generating friction with the fixing portion 20 of the cover body 2 during the reciprocating rotation of the mass block 40, thereby preventing noise and ensuring the service life of the cover body 2.

[0037] The working principle of the swing vibration motor of the utility model is as follows:

[0038] The swing vibration motor uses square wave current. During the current switching process, the magnetic field generated by the coil 31 being energized attracts and repels the magnet 41, causing the rotor assembly 4 to reciprocate and output vibration. The rebound parts 431 located at the four corners of the mass block 40 stop and limit the rotation of the rotor assembly 4 and provide rebound force to restore the rotor assembly 4 to its initial state.

[0039] When the coil 31 is not energized, Figure 4A As shown, the rotor assembly 4 is maintained at the middle initial position of the accommodating space by the rebound portions 431 at its four corners;

[0040] When the coil 31 is energized, Figure 4B As shown, the magnet 41 and the coil 31 attract each other, and the rotor assembly 4 starts to rotate. When the rebound portion 431 located at the diagonal of the rotor assembly 4 touches the damping member 8 adjacent to 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 rebound portion 431, the rotor assembly 4 is rebounded and rotates. Based on this working principle, when the rebound portion 431 located at the other diagonal of the rotor assembly 4 touches the damping member 8 far away from the adjacent coil 31, the current direction is switched, and the magnet 41 and the coil 31 attract each other. During the process of mutual attraction and repulsion between the magnet 41 and the coil 31, the rotor assembly 4 reciprocates, and the setting of the mass block 40 generates strong vibration, allowing the user to feel very high-quality vibration feedback.

[0041] It should be noted that, in the description of the present invention, the terms "up", "down", "front", "back", "left", "horizontal direction", "vertical direction" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A swing vibration motor, comprising a housing, a cover, a stator assembly, a rotor assembly and a fixed shaft, wherein the housing and the cover are buckled to form a receiving space, and the stator assembly, the rotor assembly and the fixed shaft are received in the receiving space, characterized in that: The stator assembly includes a flexible circuit board and a coil electrically connected to the flexible circuit board, the fixed shaft and the flexible circuit board are fixed to the inner surface of the cover body, and the coil is fixed to the inner surface of the shell; the rotor assembly is sleeved on the fixed shaft and rotates around it, and the rotor assembly includes an integrally stamped bracket, and the bracket includes a square body and four spaced and symmetrical rebound parts bent and extended from the two side edges of the four corners of the body.

2. The swing vibration motor according to claim 1, characterized in that: The rotor assembly also includes a mass block adapted to the shape of the main body, a first mounting hole passing through the center of the mass block, second mounting holes symmetrically located on both sides of the first mounting hole and passing through the mass block, a sliding bearing embedded in the first mounting hole, and a magnet embedded in the second mounting hole; a third mounting hole is arranged on the main body corresponding to the first mounting hole.

3. The swing vibration motor according to claim 2, characterized in that: The mass block is connected and fixed to the upper surface of the body, the rebound portion is protruded toward one side of the mass block, and the mass block is located between the rebound portions; the mass block and the bracket are fixed on the sliding bearing.

4. The swing vibration motor according to claim 3, characterized in that: The rebound portion is configured to be V-shaped, U-shaped or S-shaped.

5. The swing vibration motor according to claim 4, characterized in that: The axial height of the rebound portion is less than or equal to the thickness of the mass block; the axial thickness of the sliding bearing is greater than the thickness of the mass block; the axial thickness of the magnet is equal to the thickness of the mass block; the fixed shaft protrudes from the end face of the sliding bearing toward one side of the housing.

6. The swing vibration motor according to claim 5, characterized in that: The shell comprises a square bottom wall and side walls extending vertically from four side edges of the bottom wall in the same direction; an annular limiting portion is protruded at the central position of the inner surface of the bottom wall.

7. The swing vibration motor according to claim 6, characterized in that: The coils are provided in two numbers and are adapted to the magnets; the coils are fixed to the inner surface of the side wall and are symmetrically located at diagonally opposite corners of the shell.

8. The swing vibration motor according to claim 7, characterized in that: A damping member is disposed on the inner surface of the side wall corresponding to the rebound portion.

9. The swing vibration motor according to claim 8, characterized in that: The fixed shaft is limited in the limiting portion, and a circular sliding piece is provided between the limiting portion and the fixed shaft, and the area of ​​the sliding piece is larger than the end area of ​​the sliding bearing.

10. The swing vibration motor according to claim 9, characterized in that: A fixing part is protruded at the center of the cover body, the fixing shaft is fixed in the fixing part, and a gasket is arranged between the fixing part and the sliding bearing.

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