Oscillating vibration motor
By designing the rotor and stator assembly structures of the oscillating vibration motor, diversified vibration modes and a stronger vibration experience are achieved, solving the problem of the single vibration mode of existing vibration motors and improving vibration performance and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN AWA SEIMITSU ELECTRIC CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-19
AI Technical Summary
Existing vibration motors have a single vibration mode and insufficient vibration experience, which cannot meet the diverse application needs.
An oscillating vibration motor was designed, which uses an upper and lower shell to form an accommodating space containing a rotor assembly and a stator assembly. The rotor assembly includes an eccentric block, ball bearings and magnets. Through the cooperation of a flexible circuit board and coils, the eccentric rotation and composite vibration of the rotor assembly are realized.
It achieves diversified vibration modes and a stronger vibration experience, with good structural stability, improved vibration performance, and extended service life.
Smart Images
Figure CN224385324U_ABST
Abstract
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 vibration motors typically include patch-type columnar vibration motors or flat vibration motors. An eccentric hammer mounted on the shaft rotates at high speed under the driving force of the motor. However, patch-type columnar vibration motors have a single vibration mode, and the vibration experience obtained by customers is also relatively simple.
[0004] Therefore, it is necessary to provide a vibration motor with more diverse vibration modes and stronger vibration sensation. Utility Model Content
[0005] The purpose of this utility model is to provide a swing vibration motor with more diverse vibration modes and stronger vibration sensation. The specific technical solution is as follows:
[0006] A oscillating vibration motor includes an upper housing, a lower housing, a rotor assembly, and a stator assembly. The upper housing and the lower housing are fastened together to form an accommodating space. The rotor assembly and the stator assembly are fixedly spaced apart within the accommodating space. The upper housing is a flat cylindrical shape with one open end, including a bottom wall and side walls. The inner surface of the bottom wall is integrally stamped to form a first spring sheet and a first bearing fixing part. The side walls include a planar wall with two opposite sides on one side and an arc-shaped wall with two opposite sides on the other side. The inner surface of the planar wall is symmetrically provided with planar bosses. The stator assembly includes a flexible circuit board and two coils. The flexible circuit board is bonded and fixed to the inner surface of the lower housing. The coils are respectively limited to the planar bosses and bonded and fixed to the inner surface of the planar wall. The rotor assembly is spaced apart between the coils.
[0007] Preferably, the inner surface of the lower shell is integrally stamped to form the second spring sheet and the second bearing fixing part, corresponding to the first spring sheet and the first bearing fixing part; the planar wall is parallel to the planar boss, the first spring sheet and the second spring sheet respectively; the upper and lower sides of the rotor assembly abut against the first spring sheet and the second spring sheet respectively in the width direction.
[0008] Preferably, the first bearing fixing part and the second bearing fixing part are arranged symmetrically on top of each other and are eccentrically located on one side of the arc wall.
[0009] Preferably, the rotor assembly includes a fixed shaft, an eccentric block and ball bearings sleeved and fixed on the fixed shaft, and a magnet embedded in the eccentric block; there are two ball bearings spaced apart on the upper and lower sides of the eccentric block; the eccentric blocks are spaced apart between the planar bosses, and the magnets are correspondingly arranged with the coils.
[0010] Preferably, the ball bearing is adapted and fixed to the first bearing fixing part and the second bearing fixing part, respectively.
[0011] Preferably, the first and second spring sheets are arranged diagonally above and below each other and abut against the upper and lower sides in the direction of the width of the eccentric block.
[0012] Preferably, the eccentric block is in the shape of a cuboid, including a mounting hole extending through its width for embedding a magnet, a through hole extending through its height and located on one side edge for fitting the fixed shaft, and clearance notches located on the upper and lower sides of the through hole for accommodating the ball bearing.
[0013] Preferably, a gasket is provided between the ball bearing and the first bearing fixing part and the second bearing fixing part, respectively.
[0014] Preferably, the coil spacing is located between the projections of the first and second spring sheets in the width direction of the rotor assembly; the axial height of the first and second spring sheets is greater than the distance between the eccentric block and the bottom wall and the lower shell, respectively; the axial height of the first and second spring sheets is less than the sum of the thicknesses of the ball bearing and the washer.
[0015] Preferably, the upper and lower outer surfaces of the upper and lower shells are bonded and covered with dustproof sheets.
[0016] Compared with existing technologies, the swing vibration motor of this invention not only has a novel structure but also can achieve more diverse vibration modes and has a stronger vibration feel. Attached Figure Description
[0017] Figure 1 This is a three-dimensional view of the assembly of the swing vibration motor of this utility model.
[0018] Figure 2 It is along Figure 1 Cross-sectional view of line AA in the middle.
[0019] Figure 3 This is a three-dimensional bottom view of the upper shell.
[0020] Figure 4 This is an exploded view of the structure of the swing vibration motor of this utility model.
[0021] Figure 5 This is an exploded view of the rotor assembly.
[0022] in:
[0023] 1-Upper shell; 10-Bottom wall; 11-Side wall; 100-Boss; 110-First spring sheet; 111-First bearing fixing part; 2-Lower shell; 210-Second spring sheet; 211-Second bearing fixing part; 3-Rotor assembly; 30-Eccentric block; 31-Magnet; 32-Fixed shaft; 33-Ball bearing; 34-Shim; 300-Mounting hole; 301-Through hole; 302-Relief part; 4-Stator assembly; 40-Flexible circuit board; 41-Coil; 5-Dustproof sheet. Detailed Implementation
[0024] 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.
[0025] The structure of a swing vibration motor is as follows Figures 1 to 5 As shown, it includes an upper shell 1, a lower shell 2, a rotor assembly 3, and a stator assembly 4. The upper shell 1 and the lower shell 2 are fastened together to form an accommodating space (not shown). The rotor assembly 3 and the stator assembly 4 are fixedly spaced within the accommodating space.
[0026] The upper shell 1 is a flat cylindrical shape with one end open, including a bottom wall 10 and a side wall 11. The inner surface of the bottom wall 10 is integrally stamped to form a first spring sheet 110 and a first bearing fixing part 111. The first spring sheet 110 and the first bearing fixing part 111 are integrally stamped from the bottom wall 10 and protrude towards the accommodating space. The bottom wall 10 also forms process cuts (not shown). The side wall 11 includes a planar wall (not shown) with two opposite sides on one side and an arc wall (not shown) with two opposite sides on the other side. The inner surface of the planar wall is symmetrically provided with planar bosses 100.
[0027] The inner surface of the lower shell 2 is integrally stamped to form the second spring sheet 210 and the second bearing fixing part 211, corresponding to the first spring sheet 110 and the first bearing fixing part 111. The second spring sheet 210 and the second bearing fixing part 211 are integrally stamped from the lower shell 2 and protrude towards the accommodating space. The lower shell 2 also forms process cuts (not shown). In order to prevent external impurities from entering the accommodating space through the process cuts and affecting the performance of the vibration motor, dustproof sheets 5 are bonded and covered on the upper and lower outer surfaces of the upper shell 1 and the lower shell 2. The planar walls are parallel to the planar boss 100, the first spring plate 110, and the second spring plate 210, respectively. The upper and lower sides of the rotor assembly 3 in the width direction abut against the first spring plate 110 and the second spring plate 210, respectively, to limit the initial position of the rotor assembly 3. The diagonal arrangement of the first spring plate 110 and the second spring plate 210 is conducive to the uniform distribution of the rebound force, good structural stability, uniform rebound effect, and more convenient stamping and installation of the first spring plate 110 and the second spring plate 210. The first bearing fixing part 111 and the second bearing fixing part 211 are symmetrically arranged vertically and eccentrically located on one side of the arc wall. That is, the eccentric arrangement of the first bearing fixing part 111 and the second bearing fixing part 211 in the accommodating space can effectively utilize the internal accommodating space of the vibration motor, so that the center of mass and weight of the rotor assembly can be greatly improved to output a larger vibration.
[0028] The stator assembly 4 includes a flexible circuit board 40 and two coils 41. The flexible circuit board 40 is bonded and fixed to the inner surface of the lower shell 2. The coils 41 are respectively confined to the planar bosses 100 and bonded and fixed to the inner surface of the planar wall. The rotor assembly 3 is spaced between the coils 41. The distances between the two sides of the rotor assembly 3 and the coils 41 are equal, and the distances between the planar wall and the first spring sheet 110 and the second spring sheet 210 are equal. The spacing between the coils 41 is greater than the spacing between the first spring sheet 110 and the second spring sheet 210. The spacing between the planar bosses 100 is greater than the spacing between the coils 41, ensuring the symmetry of the width of the rotor assembly 3, thereby making the structure of the vibration motor more stable.
[0029] The rotor assembly 3 includes a fixed shaft 32, an eccentric block 30 sleeved and fixed on the fixed shaft 32, a ball bearing 33, and a magnet 31 embedded in the eccentric block 30. The eccentric block 30 is generally rectangular, including a mounting hole 300 through its width for embedding a magnet 31, a through hole 301 through its height and located on one side edge for mounting a fixed shaft 33, and clearance notches 302 located on the upper and lower sides of the through hole 301 for accommodating ball bearings 33. The magnet 31 is a bipolar magnet. There are two ball bearings 33 spaced apart on the upper and lower sides of the eccentric block 30. The eccentric blocks 30 are spaced apart between the planar bosses 100. The magnets 31 are correspondingly arranged with coils 41. The arrangement of two coils 41 helps to enhance the magnetic field strength, thereby improving the response time of the vibration motor. The ball bearings 33 are respectively adapted and fixed to the first bearing fixing part 111 and the second bearing fixing part 211. The upper and lower surfaces of the two ball bearings 33 are flush with the upper and lower surfaces of the upper shell 1 and the lower shell 2, respectively, to ensure that the dustproof sheet 5 can better and more completely adhere to and cover the upper and lower surfaces of the upper shell 1 and the lower shell 2. The first and second spring plates 110 and 210, which are diagonally arranged vertically, abut against the upper and lower sides of the eccentric block 30 in the width direction. Preferably, a shim 34 is provided between the ball bearing 33 and the first bearing fixing part 111 and the second bearing fixing part 211, respectively, to prevent the ball bearing 33 from being severely worn and generating noise due to the reciprocating rotation of the rotor assembly 3, thereby improving the service life and vibration performance of the vibration motor. The coil 41 is spaced between the projections of the first spring plate 110 and the second spring plate 210 in the width direction of the rotor assembly 3. The axial height of the first spring plate 110 and the second spring plate 210 is greater than the distance between the eccentric block 30 and the bottom wall 10 and the lower shell 2, respectively. The axial height of the first spring plate 110 and the second spring plate 210 is less than the sum of the thicknesses of the ball bearing 33 and the washer 34, thereby preventing the first spring plate 110 and the second spring plate 210 from extending into the magnetic field between the magnet 31 and the coil 41 and thus blocking the magnetic lines of force. Only the first spring plate 110 and the second spring plate 210 limit the rotor assembly 3 to be maintained at or restored to its initial position.
[0030] The working principle of the swing vibration motor of this utility model is as follows:
[0031] like Figure 2 As shown, when coil 41 is not energized, magnet 31, which has both N and S poles, is symmetrically positioned between coil 41 by the first spring plate 110 and the second spring plate 210. When coil 41 is energized, it generates a magnetic field, causing the S poles of both coils 41 to attract the N pole on one side of magnet 31 in its initial position, thus driving rotor assembly 3 to rotate clockwise (as shown). Figure 2(As indicated by the arrow in the figure); when the rotor assembly 3 is detected by an external device (not shown) to reach the displacement peak, the current direction of the coil 41 is switched so that the two coils 41 form S poles respectively, which attract the S pole on the other side of the magnet 31 in the initial position, pushing the rotor assembly 3 to rotate counterclockwise, thereby generating vibration by the rotor assembly 3 reciprocating around the fixed shaft 33. When the coil 41 is de-energized, the rotor assembly 3 returns to the initial position by the rebound force of the first rebound piece 110 and the second rebound piece 210 on both sides.
[0032] In this invention, the rotor assembly 3 vibrates sinusoidally, with a 90-degree phase difference between displacement and velocity. When the displacement reaches its maximum value (displacement peak), the velocity is zero; when the displacement is zero, the velocity reaches its maximum value (velocity peak). Therefore, the velocity peak usually occurs before the displacement reaches its maximum value. In this invention, the oscillating vibration motor obtains the displacement peak of the rotor assembly 3 by precisely setting the resonant frequency (fo±Δf) of the rotor assembly 3. This value can be detected and obtained by an external device. When the rotor assembly 3 reaches its displacement peak, i.e., when the velocity reaches its maximum value, switching the direction of the magnetic field force can maintain the continuity of the oscillating energy of the rotor assembly 3, thereby obtaining the strongest vibration of the oscillating vibration motor of this invention.
[0033] 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.
[0034] 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 lower housing, a rotor assembly, and a stator assembly, wherein the upper housing and the lower housing are fastened together to form an accommodating space, and the rotor assembly and the stator assembly are fixedly positioned vertically within the accommodating space, characterized in that: The upper shell is a flat cylindrical shape with one end open, including a bottom wall and side walls. The inner surface of the bottom wall is integrally stamped to form a first spring sheet and a first bearing fixing part. The side wall includes a planar wall with two opposite sides on one side and an arc wall with two opposite sides on the other side. The inner surface of the planar wall is symmetrically provided with planar bosses. The stator assembly includes a flexible circuit board and two coils. The flexible circuit board is bonded and fixed to the inner surface of the lower shell. The coils are respectively limited to the planar bosses and bonded and fixed to the inner surface of the planar wall. The rotor assembly is spaced between the coils.
2. The wobble vibration motor according to claim 1, characterized by The inner surface of the lower shell is integrally stamped to form the second spring sheet and the second bearing fixing part, corresponding to the first spring sheet and the first bearing fixing part; the planar wall is parallel to the planar boss, the first spring sheet and the second spring sheet respectively; the upper and lower sides of the rotor assembly abut against the first spring sheet and the second spring sheet respectively in the width direction.
3. The wobble vibration motor according to claim 2, characterized by The first bearing fixing part and the second bearing fixing part are symmetrically arranged vertically and are eccentrically located on one side of the arc wall.
4. The wobble vibration motor according to claim 3, characterized by The rotor assembly includes a fixed shaft, an eccentric block and ball bearings sleeved and fixed on the fixed shaft, and a magnet embedded in the eccentric block; there are two ball bearings spaced apart on the upper and lower sides of the eccentric block; the eccentric blocks are spaced apart between the planar bosses, and the magnets are correspondingly arranged with the coils.
5. The wobble vibration motor according to claim 4, wherein The ball bearings are respectively adapted and fixed to the first bearing fixing part and the second bearing fixing part.
6. The wobble vibration motor according to claim 5, characterized by The first and second spring sheets are arranged diagonally above and below each other and abut against the upper and lower sides of the eccentric block in the width direction.
7. The wobble vibration motor according to claim 6, characterized by The eccentric block is generally rectangular and includes a mounting hole through its width for embedding a magnet, a through hole through its height and located on one side edge for fitting the fixed shaft, and clearance notches located on the upper and lower sides of the through hole for accommodating the ball bearing.
8. The wobble vibration motor according to claim 7, characterized by Gaskets are provided between the ball bearing and the first bearing fixing part and the second bearing fixing part, respectively.
9. The wobble vibration motor according to claim 8, characterized by The coil spacing is located between the projections of the first and second spring sheets in the width direction of the rotor assembly; the axial height of the first and second spring sheets is greater than the distance between the eccentric block and the bottom wall and the lower shell, respectively; the axial height of the first and second spring sheets is less than the sum of the thicknesses of the ball bearing and the gasket.
10. The wobble vibration motor of claim 1, wherein The upper and lower outer surfaces of the upper and lower shells are bonded and covered with dustproof sheets.