A vibrating motor

Abstract

The utility model provides a kind of vibration motor, including shell, vibrator subassembly suspended in shell, elastic support connected in vibrator subassembly and shell, stator subassembly fixed in shell;Vibrator subassembly includes mass block connected to elastic support;Elastic support includes the first connecting arm fixed with mass block, the second connecting arm fixed with shell and the elastic arm connecting the first connecting arm and the second connecting arm, the side of the first connecting arm away from mass block is equipped with soldering piece, the outer periphery of mass block is equipped with boss for being fixed with the first connecting arm, soldering piece includes the first side edge close to elastic arm, boss includes the second side edge close to elastic arm, the projection contour line of second side edge at least partially falls into mass block along the projection contour line of first direction, the projection contour line of first side edge and the projection contour line of second side edge are staggered distribution along the first direction, and first direction is parallel to the thickness direction of first connecting arm. The service life of vibration motor can be effectively improved by the implementation of the application scheme.

Description

Technical Field

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

[0002] With the development of electronic technology, the demand for mobile electronic products is increasing. These electronic products use vibration motors to provide system vibration feedback, such as call notifications, message notifications, and vibration feedback in games.

[0003] In related technologies, vibration motors typically include a housing, an oscillator housed within the housing, a stator, and an elastic support. The oscillator comprises a mass block and a magnetic circuit assembly. The elastic support connects the housing and the oscillator to support its reciprocating motion; the stator drives the oscillator to vibrate. However, in these vibration motors, the elastic support is welded to the mass block using welding plates. After prolonged operation, the elastic support is prone to breakage, causing the vibration motor to malfunction. Therefore, the lifespan of vibration motors needs improvement. Utility Model Content

[0004] The purpose of this invention is to provide a vibration motor that addresses the issue of insufficient lifespan in related technologies.

[0005] The technical solution of this utility model is as follows: A vibration motor is provided, including a housing, an oscillator assembly suspended within the housing, an elastic bracket connecting the oscillator assembly and the housing, and a stator assembly fixed within the housing for driving the oscillator assembly to vibrate. The oscillator assembly includes a mass block connected to the elastic bracket. The elastic bracket includes a first connecting arm fixed to the mass block, a second connecting arm fixed to the housing, and an elastic arm connecting the first connecting arm and the second connecting arm. A welding piece is provided on the side of the first connecting arm facing away from the mass block. A boss is provided on the outer periphery of the mass block. The first connecting arm is fixed to the boss. The welding piece includes a first side near the elastic arm. The boss includes a second side near the elastic arm. The projection contour line of the second side along a first direction at least partially falls into the mass block, and the projection contour lines of the first side and the second side are misaligned along the first direction, which is parallel to the thickness direction of the first connecting arm.

[0006] Furthermore, the projected contour line along the first side of the first direction at least partially falls within the mass block.

[0007] Furthermore, the first side is either an arc edge or a straight edge.

[0008] Furthermore, in a second direction parallel to the width direction of the first connecting arm, the second side gradually approaches the elastic arm from the edge toward the center.

[0009] Furthermore, the second side includes a middle portion and inclined portions connected to opposite ends of the middle portion along a second direction, with each inclined portion gradually moving away from the elastic arm from one end connected to the middle portion to the other end.

[0010] Furthermore, a receiving cavity is provided inside the mass block, and the oscillator assembly also includes a magnetic circuit structure fixed to the mass block inside the receiving cavity; the stator assembly extends at least partially into the receiving cavity and is spaced apart from the magnetic circuit structure; the stator assembly includes a solenoid fixed to the bottom side of the housing, a coil wound around the outer periphery of the solenoid, and an FPC fixed to the housing and electrically connected to the coil.

[0011] Furthermore, a protective layer is provided on the outer periphery of the solenoid.

[0012] Furthermore, the winding plane of the coil is perpendicular to the vibration direction of the oscillator assembly. The magnetic circuit structure includes a first magnet group arranged on one side of the coil along the vibration direction of the oscillator assembly and a second magnet group arranged on the other side of the coil along the vibration direction of the oscillator assembly. The first magnet group and the second magnet group are symmetrically arranged. Both the first magnet group and the second magnet group include multiple magnetized regions arranged sequentially along the vibration direction. The magnetization direction of the magnetized regions is perpendicular to the vibration direction. The magnetization directions of two adjacent magnetized regions are opposite. The magnetization directions of the magnetized regions that are opposite in position in the first magnet group and the second magnet group are opposite.

[0013] Furthermore, the magnetic circuit structure also includes a first magnetic guide plate attached to the first magnet group and a second magnetic guide plate attached to the second magnet group. The first magnetic guide plate is located on the side of the first magnet group away from the second magnet group, and the second magnetic guide plate is located on the side of the second magnet group away from the first magnet group.

[0014] Furthermore, the outer periphery of the mass block is provided with a clearance groove, and the stator assembly also includes a limiting block fixed inside the housing and corresponding to the clearance groove. The limiting block is used to move relative to the clearance groove during the vibration of the mass block to limit the displacement stroke of the mass block.

[0015] The beneficial effects of this utility model are as follows: the first connecting arm of the elastic bracket is connected and fixed to the boss, and a welding piece is provided on the side of the first connecting arm away from the boss. The welding piece has a first side near the elastic arm, and the boss has a second side near the elastic arm. The projection contour line of the second side along the thickness direction of the first connecting arm at least partially falls into the mass block. The projection contour lines of the first side and the second side are staggered along the thickness direction of the first connecting arm. This structural design can achieve stress transfer through the first side and the second side at different positions, avoiding stress concentration at the end of the first connecting arm when it swings. This reduces the probability of the first connecting arm of the elastic bracket breaking, improves the vibration performance and service life of the elastic bracket, and also improves the overall vibration performance and service life of the vibration motor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the vibration motor in an embodiment of this utility model; Figure 2 This is an exploded view of the vibration motor in an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of the vibration motor after the upper shell is removed in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structural connection of the mass block, welding sheet, and elastic support in an embodiment of this utility model; Figure 5 This is a schematic diagram of the overall structure of the mass block in an embodiment of this utility model; Figure 6 This is a schematic diagram of the magnetic circuit structure of the magnet in the embodiment of this utility model.

[0017] In the accompanying drawings, the reference numerals denote: 1. Housing; 11. Upper housing; 12. Base plate; 2. Oscillator assembly; 21. Mass block; 211. Receiving cavity; 212. First side surface; 213. Second side surface; 214. Transition surface; 215. Boss; 2151. Second side edge; 2151a. Middle part; 2151b. Inclined edge; 2152. First protrusion; 2153. Second protrusion; 216. Mounting groove; 217. Clearance groove; 22. Magnetic circuit structure; 221. First magnet assembly; a. First magnetization area; b. 1. Second magnetization area; c. Third magnetization area; 222. First magnetic guide plate; 223. Second magnet assembly; d. Fourth magnetization area; e. Fifth magnetization area; f. Sixth magnetization area; 224. Second magnetic guide plate; 3. Stator assembly; 31. Solenoid; 311. Protective layer; 32. Coil; 33. FPC; 34. Limiting block; 4. Elastic bracket; 41. First connecting arm; 42. Elastic arm; 43. Second connecting arm; 44. Welding sheet; 441. First side; 5. Damping component; 51. Fixing part; 52. Main body. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the protection scope of this utility model.

[0019] In the description of this utility model, it should be understood that the terms "width", "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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 element 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.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Example: like Figure 1-6 As shown, in this embodiment, the vibration motor includes a housing 1, a vibrator assembly 2 suspended within the housing 1, an elastic support 4 connecting the vibrator assembly 2 and the housing 1, and a stator assembly 3 fixed within the housing 1 for driving the vibrator assembly 2 to vibrate. The vibrator assembly 2 includes a mass block 21 connected to the elastic support 4. The elastic support 4 includes a first connecting arm 41 fixed to the mass block 21, a second connecting arm 43 fixed to the housing 1, and an elastic arm 42 connecting the first connecting arm 41 and the second connecting arm 43. The first connecting arm 41 is positioned away from the mass block 21. A welding piece 44 is also provided on one side, and a boss 215 is provided on the outer periphery of the mass block 21. The first connecting arm 41 is fixed to the boss 215. The welding piece 44 includes a first side 441 close to the elastic arm 42, and the boss 215 includes a second side 2151 close to the elastic arm 42. The projection outline of the second side 2151 along the first direction at least partially falls into the mass block 21, and the projection outline of the first side 441 and the projection outline of the second side 2151 are misaligned along the first direction. The first direction is parallel to the thickness direction of the first connecting arm 41.

[0022] Specifically, a boss 215 is provided to fix the first connecting arm 41 of the elastic bracket 4, and a welding piece 44 is provided on the side of the first connecting arm 41 away from the boss 215. The welding piece 44 has a first side 441 close to the elastic arm 42, and the boss 215 has a second side 2151 close to the elastic arm 42. The projection outline of the second side 2151 along the thickness direction of the first connecting arm 41 at least partially falls into the mass block 21. The projection outlines of the first side 441 and the second side 2151 along the thickness direction of the first connecting arm 41 are staggered. Based on this structural design, when the vibration motor is working, stress transfer can be achieved at different positions through the first side 441 and the second side 2151, respectively, to avoid stress concentration at the end of the first connecting arm 41 when it swings. This reduces the probability of the first connecting arm 41 of the elastic bracket 4 being broken, improves the vibration performance and service life of the elastic bracket 4, and also improves the overall vibration performance and service life of the vibration motor. In some specific embodiments, a welding piece 44 is also provided on the side of the second connecting arm 43 away from the housing 1. The second connecting arm 43 can be fixed to the inner wall of the housing 1 by the welding piece 44, thereby ensuring the connection stability between the second connecting arm 43 and the housing 1.

[0023] like Figure 2-4 As shown, in this embodiment, along the first direction, i.e. the thickness direction of the first connecting arm 41, the projected outline of the first side 441 at least partially falls within the mass block 21. That is, along the thickness direction of the first connecting arm 41, the projected outer outline of the mass block 21, the projected outline of the first side 441, and the projected outline of the second side 2151 do not coincide. During the process of the oscillator assembly 2 vibrating and deforming the elastic support 4, stress transfer can be achieved in the mass block 21 at the positions of the first connecting arm 41 corresponding to the first side 441, the positions corresponding to the second side 2151, and the positions corresponding to the corners of the mass block 21, thereby further improving the service life of the elastic support 4.

[0024] In this embodiment, the first side 441 is an arc edge or a straight edge; preferably, the first side 441 can be an arc edge, which can effectively avoid stress peaks at the first side 441 when stress is transmitted from the first connecting arm 41.

[0025] Furthermore, such as Figure 2-5As shown, in this embodiment, the first side 441 can be a straight edge, and the projection outline of the second side 2151 along the first direction is located between the projection outline of the first side 441 and the projection outline of the elastic arm 42. The boss 215 includes a first protrusion 2152 disposed on the outer periphery of the mass block 21 and a second protrusion 2153 connected to the first protrusion 2152 and facing the side of the elastic arm 42. The second side 2151 is located on the side of the second protrusion 2153 facing away from the first protrusion 2152. The projection of the first protrusion 2152 along the first direction coincides with the projection of the solder sheet 44 along the first direction, while the projection of the second protrusion 2153 along the first direction does not coincide with the projection of the solder sheet 44 along the first direction. That is, the distance from the first side 441 to the elastic arm 42 is greater than the minimum distance from the second side 2151 to the elastic arm 42, so that the second side 2151 and the first side 441 are staggered along the vibration direction, thereby stress transfer can be achieved through the first side 441 and the second side 2151 at different positions, thus improving the service life of the first connecting arm 41.

[0026] Furthermore, such as Figure 4 and 5 As shown, in this embodiment, in the second direction parallel to the width direction of the first connecting arm 41, the second side 2151 gradually approaches the elastic arm 42 from its edge towards its center. In this embodiment, both the first and second directions are perpendicular to the vibration direction of the oscillator assembly 2, and the first direction, the second direction, and the vibration direction are mutually perpendicular. The side of the second protrusion 2153 away from the first protrusion 2152 is non-planar, and the center of the side of the second protrusion 2153 away from the first protrusion 2152 protrudes towards the elastic arm 42. This design helps to increase the stress contact points between the first connecting arm 41 and the boss 215, thereby better dispersing stress.

[0027] Furthermore, in this embodiment, the second side 2151 includes a middle portion 2151a and inclined portions 2151b connected to opposite ends of the middle portion 2151a along a second direction. Each inclined portion 2151b gradually moves away from the elastic arm 42 from one end connected to the middle portion 2151a to the other end. Making the second side 2151 a multi-segment structure can further disperse the stress concentration points in the contact area between the boss 215 and the first connecting arm 41, allowing the stress on the first connecting arm 41 to be distributed and transmitted smoothly, minimizing the stress concentration effect and improving the fatigue life of the elastic support 4. It is understood that in some specific embodiments, the middle portion 2151a and the inclined portions 2151b can be either planar or curved surfaces, and this is not limited. In other embodiments, the second side 2151 can also be designed as an arc-shaped surface protruding towards the elastic arm 42, and this is not limited.

[0028] In this embodiment, two elastic supports 4 are symmetrically arranged around the outer periphery of the mass block 21. The elastic supports 4 are arranged around the outer periphery of the ends of the mass block 21, and the first connecting arm 41 and the corresponding second connecting arm 43 are located on opposite sides of the mass block 21. While ensuring sufficient restoring force for the oscillator assembly 2, this also improves the utilization rate of the assembly space within the housing 1, thereby allowing the vibration motor to be made more compact and refined. Specifically, the first connecting arm 41, the elastic arm 42, and the second connecting arm 43 form a semi-enclosed elastic frame. The two elastic frames are respectively arranged around the two ends of the mass block 21. Thus, regardless of whether the mass block 21 is displaced in the vibration direction or deflected in a direction perpendicular to the vibration direction, the elastic supports 4 can provide sufficient support and restoring force to ensure that the oscillator assembly 2 can be reset after movement.

[0029] like Figure 4 and 5 As shown, in this embodiment, the mass block 21 includes a first side surface 212 with a boss 215, a second side surface 213 perpendicular to the first side surface 212, and a transition surface 214 connecting the first side surface 212 and the second side surface 213. That is, the connection between adjacent sides of the mass block 21 in this embodiment is a rounded corner structure, which can effectively prevent stress concentration at the corresponding corner when the elastic support 4 contacts the corner of the mass block 21, thereby effectively reducing the probability of the elastic support being directly broken and improving the service life of the elastic support 4 and the vibration motor.

[0030] like Figure 2 and 3 As shown, in this embodiment, a receiving cavity 211 is provided inside the mass block 21, and the magnetic circuit structure 22 is fixed to the mass block 21 inside the receiving cavity 211; the stator assembly 3 extends at least partially into the receiving cavity 211 and is spaced apart from the magnetic circuit structure 22; the stator assembly 3 includes a solenoid 31 fixed to the bottom side of the housing 1, a coil 32 wound around the outer periphery of the solenoid 31, and an FPC 33 fixed to the housing 1 and electrically connected to the coil 32, with the coil 32 spaced apart from the magnetic circuit structure 22.

[0031] Specifically, FPC33 is electrically connected to coil 32. When coil 32 is energized, coil 32 and magnetic circuit structure 22 can generate driving force under the action of alternating current, thereby driving mass block 21 and magnetic circuit structure 22 to move along the vibration direction. At the same time, elastic support 4 deforms and generates restoring force. When the driving direction changes, the restoring force of elastic support 4 can assist mass block 21 to move in the opposite direction, forming stable reciprocating vibration, and finally transmitting the vibration to the outside through housing 1. In this embodiment, housing 1 includes bottom plate 12 and upper shell 11. Vibrator assembly 2, stator assembly 3, elastic support 4, etc. are all fixed in the accommodating space formed by upper shell 11 and bottom plate 12.

[0032] In this embodiment, a protective layer 311 is provided on the outer periphery of the solenoid 31. The protective layer 311 can be a polymer material sprayed on the outer periphery of the solenoid 31. The protective layer 311 can prevent the enameled wire outside the coil 32 from being punctured, thus protecting the coil 32 and further improving the service life of the vibration motor. In some specific embodiments, the material of the protective layer 311 can be Parylene, a polymer of paraxylene, which can provide good protection for the coil 32 and improve the service life and reliability of the vibration motor in harsh environments.

[0033] In this embodiment, the magnetic circuit structure 22 is provided with multiple magnet groups, which are symmetrically distributed outside the coil 32. That is, the magnetic circuit structure 22 in this embodiment is provided with multiple magnet groups, and the magnetic field generated by the energized coil 32 can interact with each magnet group simultaneously, thereby generating a larger electromagnetic driving force under the same current, which significantly improves the vibration intensity and efficiency of the motor. In a preferred embodiment, two magnet groups can be provided, which are distributed on opposite sides outside the coil 32 along a direction perpendicular to the vibration direction. Of course, in other embodiments, the magnetic circuit structure 22 can also be provided with three, four or more magnet groups, which is not limited here.

[0034] Further, in this embodiment, the winding plane of the coil 32 is perpendicular to the vibration direction of the oscillator assembly 2. The magnetic circuit structure 22 includes a first magnet group 221 disposed on one side of the coil 32 along the vibration direction of the oscillator assembly 2 and a second magnet group 223 disposed on the other side of the coil 32 along the vibration direction of the oscillator assembly 2. The first magnet group 221 and the second magnet group 223 are symmetrically arranged. Both the first magnet group 221 and the second magnet group 223 include multiple magnetized regions arranged sequentially along the vibration direction. The magnetization direction of the magnetized regions is perpendicular to the vibration direction. The magnetization directions of two adjacent magnetized regions are opposite. The magnetization directions of the magnetized regions in the first magnet group 221 and the second magnet group 223 that are opposite in position are also opposite. Figure 6As shown, in some specific embodiments, the first magnet group 221 includes a first magnetized region a, a second magnetized region b, and a third magnetized region c arranged in sequence, and the second magnet group 223 includes a fourth magnetized region d, a fifth magnetized region e, and a sixth magnetized region f arranged in sequence; wherein, the magnetization direction of the first magnetized region a is opposite to the magnetization direction of the second magnetized region b, and the magnetization direction of the first magnetized region a is the same as the magnetization direction of the third magnetized region c; the magnetization direction of the fourth magnetized region d is opposite to the magnetization direction of the fifth magnetized region e, and the magnetization direction of the fourth magnetized region d is the same as the magnetization direction of the sixth magnetized region f; the magnetization direction of the first magnetized region a is opposite to the magnetization direction of the fourth magnetized region d, the magnetization direction of the second magnetized region b is opposite to the magnetization direction of the fifth magnetized region e, and the magnetization direction of the third magnetized region c is opposite to the magnetization direction of the sixth magnetized region f. For example, the side of the first magnetized region a, the third magnetized region c, the fourth magnetized region d, and the sixth magnetized region f that is away from the coil 32 can be the S pole, and the side of the second magnetized region b and the fifth magnetized region e that is away from the coil 32 can be the N pole.

[0035] It is understood that in this embodiment, the first magnet group 221 can be formed by splicing multiple magnets or by magnetizing a single magnet in multiple segments. Similarly, the second magnet group 223 can be formed by splicing multiple magnets or by magnetizing a single magnet in multiple segments; no limitation is imposed here. Preferably, both the first magnet group 221 and the second magnet group 223 are obtained by magnetizing a single magnet in segments. Magnetizing the magnets in segments before assembling them with the mass block 21 simplifies the assembly process and reduces production costs. In this embodiment, both the first magnet group 221 and the second magnet group 223 are three-pole magnetization circuits. Of course, in some other embodiments, the first magnet group 221 and the second magnet group 223 can also be five-pole magnetization circuits; no limitation is imposed here.

[0036] In this embodiment, the magnetic circuit structure 22 further includes a first magnetic guide plate 222 attached to the first magnet group 221 and a second magnetic guide plate 224 attached to the second magnet group 223. The first magnetic guide plate 222 is disposed on the side of the first magnet group 221 away from the second magnet group 223, and the second magnetic guide plate 224 is disposed on the side of the second magnet group 223 away from the first magnet group 221. The first magnet group 221 and the second magnet group 223 can interact with the energized coil 32 to generate electromagnetic driving force. The first magnetic guide plate 222 can efficiently converge and guide the magnetic field lines of the first magnet group 221 to the area corresponding to the coil 32, and the second magnetic guide plate 224 can efficiently converge and guide the magnetic field lines of the second magnet group 223 to the area corresponding to the coil 32, making the magnetic field more concentrated and more uniform, and making the start-up and stop actions of the vibration motor faster and cleaner.

[0037] like Figure 2 , 3 As shown in Figure 5, in this embodiment, a clearance groove 217 is provided on the outer periphery of the mass block 21. The stator assembly 3 also includes a limiting block 34 fixed inside the housing 1. The limiting block 34 is used to move relative to the clearance groove 217 during the vibration of the mass block 21 to limit the displacement stroke of the mass block 21. Through the cooperation between the limiting block 34 and the clearance groove 217, excessive displacement of the mass block 21 during movement can be effectively prevented, improving the stability of the vibration motor. In some specific embodiments, the clearance groove 217 can be provided on various sides of the outer periphery of the mass block 21. Correspondingly, the limiting block 34 can also be installed in various parts of the housing 1 corresponding to the clearance groove 217, thereby preventing excessive displacement of the mass block 21 in the corresponding direction.

[0038] It is understood that in some embodiments, the clearance groove 217 may not be provided. That is, the limiting block 34 is installed inside the housing 1, and when the mass block 21 moves to the corresponding position, the outer wall of the mass block 21 directly contacts the limiting block 34, thereby limiting the further movement of the mass block 21. Preferably, by designing the clearance groove 217, the clearance groove 217 cooperates with the limiting block 34 to achieve impact limiting. The mass block 21 can be made larger within the same volume of the housing 1, thereby improving the vibration of the vibration motor and improving the accuracy of limiting the mass block 21.

[0039] Furthermore, in some embodiments, two limiting blocks 34 are provided, distributed at opposite ends of the mass block 21 along the vibration direction of the mass block 21. Corresponding clearance grooves 217 are respectively opened at opposite ends of the outer periphery of the mass block 21 for each limiting block 34. With the clearance grooves 217 distributed at opposite ends of the mass block 21 along the vibration direction, and the limiting blocks 34 fixed inside the housing 1 and extending into the clearance grooves 217: when the mass block 21 moves to its limit in one direction, the inner wall of one clearance groove 217 contacts the corresponding limiting block 34; when the mass block 21 moves to its limit in the other direction, the inner wall of the other clearance groove 217 contacts the other limiting block 34. This achieves bidirectional rigid limiting in the vibration direction, precisely stopping overtravel displacement and improving the working performance of the vibration motor.

[0040] In this embodiment, a damping element 5 is also provided between the mass block 21 and the elastic arm 42. The presence of the damping element 5 can effectively absorb impact energy, avoid direct friction and wear between components, thereby extending the service life of the limiting block 34, the mass block 21, and the elastic support 4, and reducing the probability of motor failure due to structural damage.

[0041] Furthermore, in some embodiments, the outer periphery of the mass block 21 is provided with a mounting groove 216 communicating with the clearance groove 217; the damping member 5 includes a fixing part 51 embedded in the mounting groove 216 and a main body part 52 connected to the fixing part 51, the main body part 52 being sandwiched between the outer periphery of the mass block 21 and the elastic arm 42. Through the cooperation between the mounting groove 216 and the fixing part 51, the assembly stability between the damping member 5 and the mass block 21 can be fully ensured. The volume of the main body part 52 can be larger than that of the fixing part 51, that is, the side of the main body part 52 connected to the fixing part 51 can abut against the outer wall of the mass block 21, and the side of the main body part 52 away from the fixing part 51 can abut against the elastic arm 42 of the elastic bracket 4; and the main body part 52 can be configured to fit the shape of the elastic bracket 4, thereby effectively improving the damping effect of the oscillator assembly 2.

[0042] The above are merely embodiments of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A vibration motor, characterized in that, The device includes a housing, an oscillator assembly suspended within the housing, an elastic support connecting the oscillator assembly and the housing, and a stator assembly fixed within the housing for driving the oscillator assembly to vibrate. The oscillator assembly includes a mass block connected to the elastic support. The elastic support includes a first connecting arm fixed to the mass block, a second connecting arm fixed to the housing, and an elastic arm connecting the first connecting arm and the second connecting arm. A welding piece is provided on the side of the first connecting arm facing away from the mass block. A boss is provided on the outer periphery of the mass block. The first connecting arm is fixed to the boss. The welding piece includes a first side near the elastic arm. The boss includes a second side near the elastic arm. The projected contour line of the second side along a first direction at least partially falls into the mass block, and the projected contour lines of the first side and the second side are misaligned along the first direction, which is parallel to the thickness direction of the first connecting arm.

2. The vibration motor according to claim 1, characterized in that, The projected contour line of the first side along the first direction at least partially falls within the mass block.

3. The vibration motor according to claim 2, characterized in that, The first side is either an arc edge or a straight edge.

4. The vibration motor according to claim 3, characterized in that, In a second direction parallel to the width direction of the first connecting arm, the second side gradually approaches the elastic arm from the edge toward the center.

5. The vibration motor according to claim 4, characterized in that, The second side includes a middle portion and oblique portions connected to opposite ends of the middle portion along the second direction, with each oblique portion gradually moving away from the elastic arm from one end connected to the middle portion to the other end.

6. The vibration motor according to claim 1, characterized in that, The mass block has a receiving cavity, and the oscillator assembly also includes a magnetic circuit structure fixed to the mass block within the receiving cavity; the stator assembly extends at least partially into the receiving cavity and is spaced apart from the magnetic circuit structure; the stator assembly includes a solenoid fixed to the housing, a coil wound around the outer periphery of the solenoid, and an FPC fixed to the housing and electrically connected to the coil.

7. The vibration motor according to claim 6, characterized in that, The outer periphery of the solenoid is provided with a protective layer.

8. The vibration motor according to claim 6, characterized in that, The winding plane of the coil is perpendicular to the vibration direction of the oscillator assembly. The magnetic circuit structure includes a first magnet group disposed on one side of the coil along the vibration direction of the oscillator assembly and a second magnet group disposed on the other side of the coil along the vibration direction of the oscillator assembly. The first magnet group and the second magnet group are symmetrically arranged. Both the first magnet group and the second magnet group include a plurality of magnetized regions arranged sequentially along the vibration direction. The magnetization direction of the magnetized regions is perpendicular to the vibration direction. The magnetization directions of two adjacent magnetized regions are opposite. The magnetization directions of the magnetized regions in the first magnet group and the second magnet group that are opposite in position are opposite.

9. The vibration motor according to claim 8, characterized in that, The magnetic circuit structure further includes a first magnetic guide plate attached to the first magnet group and a second magnetic guide plate attached to the second magnet group. The first magnetic guide plate is disposed on the side of the first magnet group away from the second magnet group, and the second magnetic guide plate is disposed on the side of the second magnet group away from the first magnet group.

10. The vibration motor according to claim 1, characterized in that, The mass block has a clearance groove on its outer periphery. The stator assembly also includes a limiting block fixed inside the housing and corresponding to the clearance groove. The limiting block is used to move relative to the clearance groove during the vibration of the mass block to limit the displacement stroke of the mass block.

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