Linear vibration motor

Abstract

The utility model relates to the technical field of motors, and discloses a linear vibration motor, which comprises a shell assembly, a vibrator assembly, a magnetic conductive column and a stator assembly. The vibrator assembly is movably arranged in the shell assembly, and the vibrator assembly comprises annular magnetic steel; the magnetic conductive column is arranged in the center of the shell assembly; the stator assembly is fixed in the shell assembly and comprises an FPCB (Flexible Printed Circuit Board) and a coil; the FPCB is fixed on the housing assembly, and the coil is sleeved on the magnetic conductive column, so that the coil and the annular magnetic steel are kept concentric. The linear vibration motor provided by the utility model solves the problem that the vibration quantity of the motor is small because the concentricity between the coil and the magnetic steel cannot be ensured.

Description

Technical Field

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

[0002] Linear vibration motors are indispensable components in electronic products such as smart wearables, game controllers, mobile phones, tablets, and handheld game consoles. They provide tactile feedback to users, thus enhancing the user experience and strengthening the product's market competitiveness. A linear motor generally consists of a resonator and a stator. Vibration is generated through the interaction between the resonator and the stator, providing linear vibration. The resonator of a linear vibration motor typically uses a magnet or magnetic steel, while the stator typically uses an energized coil. Vibration is produced through the interaction between the electromagnetic force generated by the energized coil and the magnetic force of the magnet or magnetic steel.

[0003] Because existing coil assembly processes lack a positioning system, coils are typically installed with high precision using a magnetic yoke mechanism with a central shaft. The coil is then fixed to the base shell using adhesive. However, during this process, the adhesive is fluid, and the specialized jig easily becomes sticky, leading to errors in jig installation accuracy or even causing the coil to stick to the jig, significantly impacting installation efficiency. Furthermore, if a clamp is used to install the coil, other methods of positioning are required; otherwise, it is difficult to ensure the concentricity of the coil and magnet. Poor concentricity results in weak electromagnetic force, leading to low motor vibration and failing to meet the requirements of linear vibration motors.

[0004] Therefore, it is urgent to solve the problem of low motor vibration caused by the inability to guarantee the concentricity between the coil and the magnet. Utility Model Content

[0005] To address the shortcomings of the prior art, this invention provides a linear vibration motor that solves the problem of low motor vibration caused by the inability to guarantee the concentricity between the coil and the magnet.

[0006] The technical effect to be achieved by this utility model is realized through the following technical solution:

[0007] This utility model provides a linear vibration motor, comprising:

[0008] Housing assembly;

[0009] An oscillator assembly is movably disposed within a housing assembly, the oscillator assembly including a ring magnet;

[0010] A magnetic post is disposed at the center of the housing assembly; and

[0011] A stator assembly is fixed inside the housing assembly. The stator assembly includes an FPCB board and a coil. The FPCB board is fixed on the housing assembly, and the coil is sleeved on the magnetic post so that the coil and the annular magnet remain concentric.

[0012] In some implementations, the magnetic post is integrally formed at the center of the housing assembly.

[0013] In this implementation, the assembly efficiency of the overall structure is improved, the connection between the magnetic post and the housing assembly is made more stable, the overall structure is more compact, and concentricity is guaranteed.

[0014] In some implementations, a first mounting hole for mounting the magnetic post is provided at the center of the housing assembly.

[0015] In some implementations, the stator assembly further includes an annular magnetic sheet, which is sleeved on the magnetic post and abuts against the end of the coil away from the FPCB board.

[0016] In this implementation, the annular magnetic sheet is used to enhance the electromagnetic force of the coil, so that the electromagnetic force and magnetic field generated by the interaction between the coil and the annular magnet are greater and stronger, thereby enhancing the power of the linear vibration motor.

[0017] In some implementations, the housing assembly has a mounting position for mounting the FPCB board; the FPCB board has a second mounting hole corresponding to the first mounting hole, and the magnetic post passes through both the second mounting hole and the first mounting hole to be fixed on the housing assembly.

[0018] In this implementation, the mounting position on the housing assembly serves to limit the installation of the FPCB board, thereby facilitating the assembly between the FPCB board and the housing assembly and improving assembly efficiency.

[0019] In some implementations, the oscillator assembly further includes a tower-shaped spring and an oscillator, the oscillator being sleeved on the annular magnet, one end of the tower-shaped spring elastically abutting against the housing assembly, and the other end elastically abutting against the annular magnet and the oscillator respectively.

[0020] In some implementations, a magnetic protrusion extends from the contact point between the vibrator and the tower-shaped spring.

[0021] In this implementation, the vibrator can be welded together with the tower-shaped spring through a magnetic guide boss. The magnetic guide boss has a ring structure and has a magnetic guiding effect, which can shield the magnetic field generated by the ring magnet inside the magnetic guide boss, so that the magnetic field generated by the ring magnet can fully generate magnetic force with the magnetic field generated by the coil.

[0022] In some implementations, the housing assembly includes a first housing and a second housing, the first housing and the second housing together forming an accommodating space for accommodating the oscillator assembly and the stator assembly, and the second housing is connected to the first housing.

[0023] In this implementation, the first and second housings protect the oscillator assembly and the stator assembly, preventing them from rubbing or wearing against external equipment during operation, thus improving the service life of the linear vibration motor.

[0024] In some implementations, the periphery of the second housing is provided with a slot, and the first housing extends with a snap-fit ​​portion for snapping into the slot.

[0025] In some implementations, the tower-shaped spring has a locking block extending from one end edge of the FPCB board for engaging with the slot.

[0026] In summary, this utility model has at least the following advantages:

[0027] The linear vibration motor provided by this utility model has a magnetic guide post at the center of the housing assembly, and the coil is sleeved on the magnetic guide post. This allows the coil to be fixed at the center of the housing assembly without the need for an auxiliary positioning system, simplifying the installation process. The magnetic guide post also has a magnetic guiding effect, guiding the annular magnet to maintain coaxiality with the coil, further ensuring the concentricity between the annular magnet and the coil, and also enhancing the magnetic field strength to increase the electromagnetic force. This results in a larger vibration and a more noticeable vibration of the linear vibration motor, solving the problem of small vibration caused by the inability to ensure the concentricity between the coil and the magnet. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the linear vibration motor in Example 1;

[0029] Figure 2 for Figure 1 A schematic cross-sectional view of the linear vibration motor is shown.

[0030] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the magnetic guide post integrally formed into the housing assembly.

[0031] Figure 4 for Figure 1 The diagram shows the structure of the housing assembly and the magnetic post.

[0032] Figure 5 for Figure 1 The diagram shows the structure of the annular magnetic sheet.

[0033] Figure 6 for Figure 5 A schematic cross-sectional view of the annular magnetic conductive sheet shown;

[0034] Figure 7 This is a schematic diagram of the FPCB board and housing assembly in Example 2;

[0035] Figure 8 for Figure 7 A cross-sectional schematic diagram of the FPCB board and housing assembly is shown;

[0036] Figure 9 This is a schematic diagram of the linear vibration motor in Example 2;

[0037] Figure 10 This is a schematic diagram of the oscillator assembly in the static state of Example 2;

[0038] Figure 11 for Figure 10 A schematic diagram showing the upward vibration state of the oscillator assembly;

[0039] Figure 12 for Figure 10 A schematic diagram showing the downward vibration state of the oscillator assembly;

[0040] Figure 13 for Figure 9 A schematic diagram of the linear vibration motor from another perspective;

[0041] Figure 14 for Figure 13 A schematic cross-sectional view of the linear vibration motor is shown.

[0042] Figure 15 This is a schematic diagram of the linear vibration motor in Example 3.

[0043] Marked in the image:

[0044] 1. Housing assembly; 11. First mounting hole; 12. Mounting position; 13. First housing; 131. Snap-fit ​​part; 14. Second housing; 141. Snap-fit ​​groove; 15. Accommodating space;

[0045] 2. Oscillator assembly; 21. Ring magnet; 211. Magnetic fluid; 22. Tower spring; 221. Locking block; 23. Oscillator; 231. Magnetic guide boss;

[0046] 3. Magnetic column;

[0047] 4. Stator assembly; 41. FPCB board; 411. Second mounting hole; 42. Coil; 43. Annular magnetic sheet. DETAILED DESCRIPTION

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of this utility model, not all embodiments.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0050] Example 1:

[0051] Please see the appendix Figures 1-5 The linear vibration motor of this utility model includes a housing assembly 1, an oscillator assembly 2, a magnetic guide column 3, and a stator assembly 4.

[0052] In this regard, please combine Figure 1 and Figure 2 , Figure 1 and Figure 2 The diagram illustrates the structural relationship between the annular magnet 21 and the coil 42 in this embodiment of the present invention. Specifically, the oscillator assembly 2 is movably disposed within the housing assembly 1, and the oscillator assembly 2 includes the annular magnet 21; the magnetic guide post 3 is disposed at the center of the housing assembly 1; the stator assembly 4 is fixed within the housing assembly 1, and the stator assembly 4 includes an FPCB board 41 and a coil 42; the FPCB board 41 is fixed on the housing assembly 1, and the coil 42 is sleeved on the magnetic guide post 3 so that the coil 42 and the annular magnet 21 remain concentric.

[0053] In this embodiment, the annular magnet 21 is a permanent magnet, capable of generating a stable magnetic field. The coil 42, when energized, generates electromagnetic force, which interacts with the magnetic force of the annular magnet 21 to achieve a vibration effect. Since the magnetic guide post 3 is located at the center of the housing assembly 1, and the coil 42 is sleeved on the magnetic guide post 3, the coil 42 is positioned at the center of the housing assembly 1. That is, the magnetic guide post 3 fixes the coil 42 at the center of the housing assembly 1 and has a magnetic guiding function, guiding the annular magnet 21 and the coil 42 to maintain coaxiality, further ensuring the concentricity between the annular magnet 21 and the coil 42. Simultaneously, it enhances the magnetic field strength, increasing the electromagnetic force generated by the interaction between the annular magnet 21 and the coil 42, thereby increasing the vibration amplitude of the linear vibration motor and providing a more noticeable tactile sensation for the user. It can be understood that the magnetic guide post 3 also simplifies the assembly of the coil 42, avoiding the problem of friction between the annular magnet 21 and the inner wall of the housing assembly 1 due to installation errors, which could affect the normal operation of the linear vibration motor. No external auxiliary positioning system is required, simplifying the assembly process and ensuring a high yield rate.

[0054] The aforementioned linear vibration motor, with a magnetic post 3 at the center of the housing assembly 1 and the coil 42 sleeved on the magnetic post 3, allows the coil 42 to be fixed at the center of the housing assembly 1 without the need for an auxiliary positioning system, simplifying the installation process. Furthermore, the magnetic post 3 provides magnetic guidance, ensuring the coaxiality of the annular magnet 21 and the coil 42, further guaranteeing the concentricity between the annular magnet 21 and the coil 42. It also enhances the magnetic field strength, increasing the electromagnetic force, thereby increasing the vibration amplitude and making the vibration sensation of the linear vibration motor more pronounced. This solves the problem of low motor vibration amplitude caused by the inability to guarantee the concentricity between the coil 42 and the magnet.

[0055] In some preferred embodiments, please refer to Figure 3 , Figure 3 The illustration shows that in this embodiment of the invention, the magnetic guide post 3 is integrally formed into the housing assembly 1. Specifically, the magnetic guide post 3 is integrally formed at the center of the housing assembly 1. This improves the assembly efficiency of the overall structure, makes the connection between the magnetic guide post 3 and the housing assembly 1 more stable, and results in a more compact overall structure while ensuring concentricity. Furthermore, the magnetic guide post 3 is formed by stretching the housing assembly 1 from the outside in, reducing the amount of material used in production and thus lowering production costs.

[0056] In some preferred embodiments, please refer to Figure 4 , Figure 4The diagram illustrates the structural relationship between the magnetic guide post 3 and the housing assembly 1 in this embodiment of the invention. Specifically, a first mounting hole 11 for mounting the magnetic guide post 3 is provided at the center of the housing assembly 1. The magnetic guide post 3 is mounted in the first mounting hole 11 at the center of the housing assembly 1, facilitating the installation and / or disassembly of the magnetic guide post 3 and the housing assembly 1 while ensuring concentricity. When the magnetic guide post 3 and / or the housing assembly 1 of the linear vibration motor are damaged, timely replacement of the magnetic guide post 3 and / or the housing assembly 1 is facilitated, improving maintenance efficiency. Preferably, the magnetic guide post 3 and the housing assembly 1 can be assembled by welding, embedding, screwing, etc. In this embodiment of the invention, the magnetic guide post 3 and the housing assembly 1 are welded together.

[0057] In some more preferred embodiments, please refer to Figure 5 and Figure 6 , Figure 5 and Figure 6 The diagram illustrates the structural relationship between the annular magnetic sheet 43, the magnetic post 3, and the coil 42 in this embodiment of the invention. Specifically, the stator assembly 4 further includes the annular magnetic sheet 43, which is sleeved on the magnetic post 3 and abuts against the end of the coil 42 facing away from the FPCB board 41. The annular magnetic sheet 43 is used to enhance the electromagnetic force of the coil 42, so that the electromagnetic force and magnetic field generated by the interaction between the coil 42 and the annular magnet 21 are greater and stronger, thereby enhancing the power of the linear vibration motor. Preferably, the annular magnetic sheet 43 and the coil 42 can be connected together by adhesive dispensing, so that the annular magnetic sheet 43 is fixed to the end of the coil 42 facing away from the FPCB board 41, further ensuring concentricity and avoiding the problem of poor concentricity between the annular magnetic sheet 43 and the coil 42 affecting the magnetic conduction effect.

[0058] Example 2:

[0059] The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the linear vibration motor of this utility model. Please refer to the appendix. Figures 7-14 .

[0060] In this regard, please combine Figure 7 and Figure 8 , Figure 7 and Figure 8 The diagram illustrates the structural relationship between the FPCB board 41 and the housing assembly 1 in this embodiment of the present invention. Specifically, the housing assembly 1 has a mounting position 12 for mounting the FPCB board 41; the FPCB board 41 has a second mounting hole 411 corresponding to the first mounting hole 11, and the magnetic post 3 passes through both the second mounting hole 411 and the first mounting hole 11 to be fixed on the housing assembly 1.

[0061] In this embodiment, the mounting position 12 on the housing assembly 1 serves to limit the installation of the FPCB board 41, thereby facilitating the assembly of the FPCB board 41 and the housing assembly 1 and improving assembly efficiency. Furthermore, the magnetic post 3 passes through both the second mounting hole 411 and the first mounting hole 11, making the connection between the FPCB board 41 and the housing assembly 1 more stable while ensuring the concentricity between them and improving the overall structural reliability. Preferably, the FPCB board 41 is connected to the housing assembly 1 by dispensing adhesive, making the connection between the FPCB board 41 and the housing assembly 1 more secure and preventing loosening.

[0062] In some preferred embodiments, please refer to Figure 9 , Figure 9 The diagram illustrates the structural relationship between the oscillator assembly 2 and the stator assembly 4 in this embodiment of the invention. Specifically, the oscillator assembly 2 further includes a tower-shaped spring 22 and an oscillator 23. The oscillator 23 is sleeved on the annular magnet 21. One end of the tower-shaped spring 22 elastically abuts against the housing assembly 1, and the other end elastically abuts against both the annular magnet 21 and the oscillator 23. The tower-shaped spring 22 elastically supports the annular magnet 21 and the oscillator 23, making the vibration of the annular magnet 21 and the oscillator 23 more pronounced. This increases the mass and kinetic energy of the oscillator assembly 2 during vibration, thereby increasing the kinetic energy of the linear vibration motor and enhancing the tactile experience provided to the user during operation. Preferably, the oscillator 23 can be a heavy annular structure, such as a steel block structure. Adhesive can be applied to the inside of the oscillator 23 to bond the oscillator 23 and the annular magnet 21 together, thereby enhancing the stability and reliability of the oscillator assembly 2.

[0063] Further, please see Figure 10 In some embodiments, the inner surface of the annular magnet 21 and / or the side near the housing assembly 1 is coated with a magnetic fluid 211 to generate damping to balance the displacement distance of the vibrator 23, thereby reducing noise while the linear vibration motor stops vibrating quickly.

[0064] Furthermore, please see Figures 10-12 , Figures 10-12The diagram illustrates the positional relationship between the oscillator assembly 2 and the annular magnetic sheet 43 in different states in this embodiment of the invention. Specifically, in the stationary state, the middle section of the annular magnet 21 is parallel to the middle section of the annular magnetic sheet 43; in the vibrating state, when the oscillator assembly 2 moves upward, the end of the annular magnet 21 connected to the tower-shaped spring 22 is parallel to the end of the annular magnetic sheet 43 connected to the coil 42; when moving downward, the end of the annular magnet 21 away from the tower-shaped spring 22 is parallel to the end of the annular magnetic sheet 43 away from the coil 42. This design results in a compact structure with a large vibration amplitude, more noticeable vibration, and thus improved reliability of the linear vibration motor.

[0065] In some more preferred embodiments, please refer to Figure 13 and Figure 14 , Figure 13 and Figure 14 The diagram illustrates the structural relationship between the magnetically conductive boss 231 and the tower-shaped spring 22 in this embodiment of the invention. Specifically, a magnetically conductive boss 231 extends from the contact point between the vibrator 23 and the tower-shaped spring 22. This allows the vibrator 23 to be welded together with the tower-shaped spring 22 via the magnetically conductive boss 231. Furthermore, the magnetically conductive boss 231 has a ring-shaped structure and a magnetically conductive effect, which can shield the magnetic field generated by the annular magnet 21 within the inner side of the magnetically conductive boss 231, allowing the magnetic field generated by the annular magnet 21 to fully interact with the magnetic field generated by the coil 42 to generate magnetic force.

[0066] It is understandable that in the existing technology, a magnetic yoke needs to be set between the vibrator 23 and the tower spring 22 to weld the vibrator 23 and the tower spring 22 together. It is conceivable that when welding the vibrator 23, the magnetic yoke and the tower spring 22 together, the welding of the three components is prone to causing misalignment during assembly, which in turn leads to defects such as a small vibration amount of the linear vibration motor. However, using a magnetic guide boss 231 integrally formed with the vibrator 23 to replace the magnetic yoke achieves the effect of the magnetic yoke while reducing the number of assembly components, optimizing the assembly process and reducing costs, and ensuring concentricity.

[0067] Example 3:

[0068] The difference between this embodiment and Embodiment 2 is that this embodiment further optimizes the structure of the linear vibration motor of this utility model. Please refer to the appendix. Figure 15 .

[0069] Please see below. Figure 15 , Figure 15 The diagram illustrates the structural relationship between the first housing 13 and the second housing 14 in an embodiment of the present invention. Specifically, the housing assembly 1 includes the first housing 13 and the second housing 14, which together form an accommodating space 15 for accommodating the oscillator assembly 2 and the stator assembly 4. The second housing 14 is connected to the first housing 13.

[0070] In this embodiment, the first housing 13 and the second housing 14 protect the oscillator assembly 2 and the stator assembly 4, preventing them from rubbing or wearing against external equipment during operation, thus improving the service life of the linear vibration motor. At the same time, when the linear vibration motor fails, the first housing 13 and / or the second housing 14 can be disassembled for repair or replacement of internal components, improving maintenance efficiency.

[0071] In some preferred embodiments, the second housing 14 has a slot 141 around its periphery, and the first housing 13 extends with a snap-fit ​​portion 131 for snapping into the slot 141. This allows the first housing 13 to snap onto the second housing 14, thereby improving the connection stability of the overall structure and facilitating the assembly and disassembly of the first housing 13 and the second housing 14. Of course, the first housing 13 is not limited to snapping onto the second housing 14; they can also be connected together by welding, embedding, or other methods.

[0072] In some more preferred embodiments, the edge of the end of the tower spring 22 that abuts against the FPCB board 41 extends with a locking block 221 for engaging with the locking slot 141. This makes the connection between the tower spring 22 and the second housing 14 more secure, and the locking slot 141 acts as a limiter, so that the tower spring 22 is fixed on the second housing 14 and the FPCB board 41 respectively, improving the overall structural reliability.

[0073] In the production and assembly process of the linear vibration motor of this utility model, the magnetic guide post 3 and the first housing 13 are first poured into the vibratory feeder. The feeding mechanism of the vibratory feeder is used to install the magnetic guide post 3 at the center of the first housing 13 and laser welding is performed. It can be understood that in this step, a stretching process can be used to stretch the bottom of the first housing 13 from the inside to the outside to form the magnetic guide post 3. The welded first housing 13 is then installed on a special fixture for the attachment of the FPCB board 41. Specifically, the second mounting hole 411 of the FPCB board 41 is aligned with the magnetic guide post 3 and slowly lowered to ensure that the FPCB board 41 and the inner bottom wall of the first housing 13 are completely adhered. Then, it flows into the next process for pressure holding and glue application. After completion, the coil 42 is installed. Specifically, the material pick clamps the outer wall of the coil 42, aligns the inner diameter of the coil 42 with the magnetic post 3, and slowly lowers it to connect the coil 42 to the FPCB board 41. Then, glue is applied to the end of the coil 42 facing away from the FPCB board 41 and flows into the next process to install the annular magnetic sheet 43. Specifically, the material pick clamps the outer wall of the annular magnetic sheet 43, aligns the inner diameter of the annular magnetic sheet 43 with the magnetic post 3, and slowly lowers it to bond the annular magnetic post 3 to the coil 42 and cure it. This ensures the concentricity between the coil 42 and the magnetic post 3, thereby ensuring the concentricity between the coil 42 and the annular magnet 21. The subsequent installation of the oscillator assembly 2 is existing technology and will not be described in detail here.

[0074] The linear vibration motor of this invention features a magnetic post 3 at the center of the housing assembly 1, with the coil 42 sleeved on the magnetic post 3. This allows the coil 42 to be fixed at the center of the housing assembly 1 without the need for an auxiliary positioning system, simplifying the installation process. Furthermore, the magnetic post 3 provides magnetic guidance, ensuring the coaxiality of the annular magnet 21 and the coil 42, further guaranteeing their concentricity. It also enhances the magnetic field strength, increasing the electromagnetic force and resulting in a larger vibration amplitude and more pronounced vibration sensation. This solves the problem of low motor vibration caused by the inability to guarantee the concentricity between the coil 42 and the magnet.

[0075] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0076] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0077] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0078] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0079] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A linear vibration motor, characterized in that, include: Housing assembly (1); The oscillator assembly (2) is movably disposed within the housing assembly (1), and the oscillator assembly (2) includes an annular magnet (21). The magnetic post (3) is disposed at the center of the housing assembly (1); and The stator assembly (4) is fixed inside the housing assembly (1). The stator assembly (4) includes an FPCB board (41) and a coil (42). The FPCB board (41) is fixed on the housing assembly (1), and the coil (42) is sleeved on the magnetic post (3) so that the coil (42) and the annular magnet (21) remain concentric.

2. The linear vibration motor according to claim 1, characterized in that, The magnetic column (3) is integrally formed at the center of the housing assembly (1).

3. The linear vibration motor according to claim 1, characterized in that, The housing assembly (1) has a first mounting hole (11) at its center for mounting the magnetic post (3).

4. The linear vibration motor according to claim 1, characterized in that, The stator assembly (4) further includes an annular magnetic sheet (43), which is sleeved on the magnetic post (3) and abuts against the end of the coil (42) away from the FPCB board (41).

5. The linear vibration motor according to claim 3, characterized in that, The housing assembly (1) has a mounting position (12) for mounting the FPCB board (41); the FPCB board (41) has a second mounting hole (411) corresponding to the first mounting hole (11), and the magnetic post (3) passes through the second mounting hole (411) and the first mounting hole (11) to be fixed on the housing assembly (1).

6. The linear vibration motor according to claim 1, characterized in that, The oscillator assembly (2) further includes a tower spring (22) and an oscillator (23). The oscillator (23) is sleeved on the annular magnet (21). One end of the tower spring (22) elastically abuts against the housing assembly (1), and the other end elastically abuts against the annular magnet (21) and the oscillator (23) respectively.

7. The linear vibration motor according to claim 6, characterized in that, A magnetic protrusion (231) extends from the contact point between the vibrator (23) and the tower-shaped spring (22).

8. The linear vibration motor according to claim 6, characterized in that, The housing assembly (1) includes a first housing (13) and a second housing (14). The first housing (13) and the second housing (14) together form an accommodating space (15) for accommodating the oscillator assembly (2) and the stator assembly (4). The second housing (14) is connected to the first housing (13).

9. The linear vibration motor according to claim 8, characterized in that, The second housing (14) has a slot (141) on its periphery, and the first housing (13) extends to have a snap-fit ​​portion (131) for snapping into the slot (141).

10. The linear vibration motor according to claim 9, characterized in that, The tower-shaped spring (22) has a locking block (221) extending from one end edge of the first housing (13) for engaging in the slot (141).

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