Spring leaf and linear vibration motor

Abstract

The application belongs to the technical field of electronic products, and discloses a spring sheet and a linear vibration motor. The spring sheet comprises a first straight section, an intermediate section and a second straight section. One end of the first straight section can be connected to the inner side wall of a motor shell, the other end and one end of the intermediate section are connected at a first obtuse angle, the other end of the intermediate section and one end of the second straight section are connected at a second obtuse angle, the other end of the second straight section can be connected to the outer side wall of a mover assembly, and the opening of the first obtuse angle and the opening of the second obtuse angle are opposite to each other. The linear vibration motor comprises a motor shell, a stator assembly and a mover assembly, the stator assembly and the mover assembly are arranged in the motor shell, and the spring sheet is arranged on the mover assembly. Both ends of the mover assembly along a first direction are provided with at least one spring sheet. One end of the first straight section of the spring sheet is connected to the inner side wall of the motor shell, and the other end of the second straight section is connected to the outer side wall of the mover assembly. The application reduces the occupation of the internal space and improves the vibration stability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electronic products, and particularly relates to a spring sheet and a linear vibration motor. BACKGROUND

[0002] Electronic products such as smart phones and watches need to use a motor to provide a vibration feeling to the product, so that the user has a better product experience. Most linear vibration motors use a vibrator system composed of a spring, a mass block and a coil. When the excitation frequency is consistent with the frequency of the vibrator system, the maximum vibration feeling is generated, and the efficiency is improved through resonance effect.

[0003] At present, some existing linear vibration motors use V-shaped springs inside, for example, Chinese patent CN217883191U. The V-shaped spring needs to be bent a lot during manufacturing, which has certain difficulty in manufacturing process, and the V-shaped spring occupies a lot of internal space of the motor, wasting the space utilization rate of the product. Moreover, the elastic coefficient of the V-shaped spring is small, which is easy to produce large swing, causing unstable vibration of the linear vibration motor.

[0004] Therefore, there is an urgent need for a spring sheet and a linear vibration motor to solve the above technical problems. SUMMARY

[0005] The purpose of the application is to provide a spring sheet and a linear vibration motor to simplify the manufacturing process of the spring, reduce the occupation of the internal space of the motor, and improve the vibration stability of the linear vibration motor.

[0006] To achieve this purpose, the application adopts the following technical solutions:

[0007] The spring sheet comprises a first straight section, a middle section and a second straight section. One end of the first straight section can be connected to the inner side wall of the motor shell, the other end and one end of the middle section are connected at a first obtuse angle, the other end of the middle section and one end of the second straight section are connected at a second obtuse angle, and the other end of the second straight section can be connected to the outer side wall of the mover assembly. The opening of the first obtuse angle and the opening of the second obtuse angle are opposite in direction.

[0008] As a preferred technical solution of the above spring sheet, the middle section comprises a third straight section, a fourth straight section and a fifth straight section. One end of the third straight section is connected to the first straight section at the first obtuse angle, the other end is connected to one end of the fourth straight section at a third obtuse angle, the opening of the first obtuse angle and the opening of the third obtuse angle are opposite in direction, the other end of the fourth straight section is connected to one end of the fifth straight section at a fourth obtuse angle, the other end of the fifth straight section is connected to the second straight section at the second obtuse angle, and the opening of the fourth obtuse angle and the opening of the second obtuse angle are opposite in direction.

[0009] As a preferred technical scheme of the spring piece, a first arc segment is connected between the third straight segment and the fourth straight segment.

[0010] A second arc segment is connected between the fourth straight segment and the fifth straight segment.

[0011] As a preferred technical scheme of the spring piece, a third arc segment is connected between the first straight segment and the middle segment.

[0012] A fourth arc segment is connected between the second straight segment and the middle segment.

[0013] As a preferred technical scheme of the spring piece, opposite two sides of the middle segment are recessed to form width-reducing grooves.

[0014] As a preferred technical scheme of the spring piece, the spring piece is integrally formed.

[0015] A linear vibration motor includes a motor housing, a stator assembly and a mover assembly, the stator assembly and the mover assembly are arranged in the motor housing, and the spring piece is arranged on the mover assembly, one end of the first straight segment of the spring piece is connected to an inner side wall of the motor housing, and the other end of the second straight segment is connected to an outer side wall of the mover assembly.

[0016] As a preferred technical scheme of the linear vibration motor, the spring piece connecting assembly includes a first welding piece and a second welding piece, the first straight segment is welded to the inner side wall of the motor housing through the first welding piece, and the second straight segment is welded to the outer side wall of the mover assembly through the second welding piece.

[0017] As a preferred technical scheme of the linear vibration motor, the spring piece connecting assembly further includes a first gasket and a second gasket, the first gasket is welded to a side of the first straight segment away from the first welding piece, and the second gasket is welded to a side of the second straight segment away from the second welding piece.

[0018] As a preferred technical scheme of the linear vibration motor, the mover assembly comprises a mass block, both ends of the mass block in a first direction are spring sheet matching portions, the spring sheet matching portion comprises, in sequence along a second direction perpendicular to the first direction, a welding recess, a first surface, a second surface, a third surface and a gasket avoiding recess, the welding recess is recessed towards a middle part of the mass block relative to the first surface, the second welding sheet is welded in the welding recess, one end of the first surface away from the welding recess extends obliquely towards the middle part of the mass block, and the other end is connected to one end of the second surface, the other end of the second surface extends obliquely towards the middle part of the mass block relative to the first surface, and the end is connected to one end of the third surface, the other end of the third surface extends along the second direction, and the gasket avoiding recess is recessed towards the middle part of the mass block relative to the third surface.

[0019] The beneficial effects of the present application are as follows:

[0020] The present application provides a spring sheet, which comprises a first straight section, an intermediate section and a second straight section connected in sequence, one end of the first straight section and the intermediate section is connected at a first obtuse angle, the other end of the intermediate section and the second straight section is connected at a second obtuse angle, the opening of the first obtuse angle and the opening of the second obtuse angle are opposite to each other, so that the spring sheet has an S-shaped structure and has a certain elasticity, since the included angles between the first straight section, the intermediate section and the second straight section are all obtuse angles, the bending angle of the spring sheet during manufacturing is small, the manufacturing process is simplified, and the space occupied by the spring sheet is small, which can reduce the occupation of the internal space of the motor, when the spring sheet is applied to the linear vibration motor, the first straight section can be connected to the inner side wall of the motor shell, and the second straight section is connected to the outer side wall of the mover assembly, the elastic coefficient of the spring sheet in the movement direction of the mover assembly is higher than that of the V-shaped spring in the prior art, thereby improving the vibration stability of the linear vibration motor.

[0021] The present application also provides a linear vibration motor comprising the above spring sheet, since the spring sheet is provided, the internal space utilization of the linear vibration motor is improved, and the vibration stability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and the drawings.

[0023] Figure 1 is an exploded view of the linear vibration motor provided by the embodiments of the present application;

[0024] Figure 2 is a top view of the linear vibration motor after the cover plate is removed according to an embodiment of the present application;

[0025] Figure 3 is a first perspective view of the spring sheet according to an embodiment of the present application;

[0026] Figure 4 is a second perspective view of the spring sheet according to an embodiment of the present application;

[0027] Figure 5 is a third perspective view of the spring sheet according to an embodiment of the present application;

[0028] Figure 6 is a structural schematic view of the mass according to an embodiment of the present application;

[0029] Figure 7 is an equivalent stress distribution diagram of the spring sheet in the linear vibration motor according to an embodiment of the present application.

[0030] In the drawings:

[0031] 1, spring sheet; 11, first straight section; 12, middle section; 121, third straight section; 122, fourth straight section; 123, fifth straight section; 124, first arc section; 125, second arc section; 126, width-reducing groove; 13, second straight section; 14, third arc section; 15, fourth arc section;

[0032] 21, bottom shell; 211, accommodating groove; 22, cover plate;

[0033] 3, mover assembly; 31, mass; 3111, welding recess; 3112, first surface; 3113, second surface; 3114, third surface; 3115, gasket avoiding recess; 32, permanent magnet; 321, magnetic pole; 322, non-magnetic block;

[0034] 4, stator assembly; 41, flexible circuit board; 42, upper coil; 43, upper pole piece; 44, lower coil; 45, lower pole piece;

[0035] 51, first welding sheet; 52, second welding sheet; 53, first gasket; 54, second gasket; 55, buffer block. DETAILED DESCRIPTION

[0036] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or like reference numerals in different drawings represent the same or like components or components having the same or similar functions. The embodiments described below are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0037] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "mounted" should be understood broadly, for example, it can be a mounted connection, or it can be a detachable connection, it can be a mechanical connection, or it can be an electrical connection, it can be a direct connection, or it can be an indirect connection through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the description of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first feature and the second feature are in direct contact, or that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] The technical scheme of the present application will be further illustrated below in conjunction with the drawings and through specific embodiments.

[0040] As shown in Figure 1 and Figure 2 The present embodiment provides a linear vibration motor, which comprises a motor housing, a stator assembly 4 and a mover assembly 3, the stator assembly 4 and the mover assembly 3 are arranged in the motor housing, and the linear vibration motor further comprises at least two spring sheets 1, both ends of the mover assembly 3 along a first direction are provided with at least one spring sheet 1, one end of the spring sheet 1 is connected to the inner side wall of the motor housing, and the other end is connected to the outer side wall of the mover assembly 3.

[0041] Specifically, the motor housing comprises a bottom shell 21 and a cover plate 22, the bottom shell 21 is provided with a containing groove 211, the mover assembly 3, the spring sheet 1 and part of the stator assembly 4 are contained in the containing groove 211, and the cover plate 22 covers the slot of the containing groove 211. Specifically, the bottom shell 21 and the cover plate 22 are covered along a third direction perpendicular to the first direction.

[0042] Specifically, the stator assembly 4 comprises a flexible circuit board 41, an upper coil 42, an upper pole piece 43, a lower coil 44 and a lower pole piece 45, the upper pole piece 43 is welded on the inner wall of the cover plate 22, the upper coil 42 is fixed on the upper pole piece 43 by using glue, the lower pole piece 45 is welded on the inner bottom wall of the bottom shell 21, and the lower coil 44 is fixed on the lower pole piece 45 by using glue. The upper coil 42 and the lower coil 44 are both in electrical communication with the circuit of the flexible circuit board 41 by using resistance welding.

[0043] More specifically, the mover assembly 3 comprises a mass block 31 and a permanent magnet 32, the mass block 31 is provided with a through slot, the permanent magnet 32 is fixed in the through slot of the mass block 31 by using glue, the permanent magnet 32 comprises two magnetic poles 321 and a non-magnetic block 322 arranged between the two magnetic poles 321, the two magnetic poles 321 are opposite in polarity and are formed by a magnetizing process, and the non-magnetic block 322 has no magnetism. An upper coil 42 and a lower coil 44 are arranged on opposite sides of the permanent magnet 32 along the third direction. In operation, an external circuit supplies alternating current to the upper coil 42 and the lower coil 44 through the flexible circuit board 41, so that the magnetic field directions of the upper coil 42 and the lower coil 44 change with the current direction, and an acting force is generated on the permanent magnet 32, thereby causing the mover assembly 3 to make a reciprocating motion. When the reciprocating motion frequency reaches a resonance frequency, the maximum vibration is achieved.

[0044] Specifically, the spring sheet 1 provided by the embodiment comprises a first straight section 11, an intermediate section 12 and a second straight section 13, one end of the first straight section 11 is connectable to an inner side wall of a motor housing, the other end and one end of the intermediate section 12 are connected at a first obtuse angle, the other end of the intermediate section 12 and one end of the second straight section 13 are connected at a second obtuse angle, and the other end of the second straight section 13 is connectable to an outer side wall of the mover assembly 3, and the openings of the first obtuse angle and the second obtuse angle are opposite in direction.

[0045] In the embodiment, the first straight section 11 is connected to the inner side wall of the bottom shell 21, and the second straight section 13 is connected to the outer side wall of the mass block 31.

[0046] The spring sheet 1 provided by the embodiment comprises a first straight section 11, an intermediate section 12 and a second straight section 13 connected in sequence, one end of the first straight section 11 and one end of the intermediate section 12 are connected at a first obtuse angle, the other end of the intermediate section 12 and the second straight section 13 are connected at a second obtuse angle, the openings of the first obtuse angle and the second obtuse angle are opposite in direction, so that the spring sheet 1 has an S-shaped structure and has a certain elasticity, the bending angles of the first straight section 11, the intermediate section 12 and the second straight section 13 are obtuse angles, so that the bending angles of the spring sheet 1 are small in manufacturing, the manufacturing process is simplified, the spring sheet 1 occupies a small space, the internal space of the motor is reduced, the first straight section 11 is connected to the inner side wall of the motor housing, the second straight section 13 is connected to the outer side wall of the mover assembly 3, and the spring sheet 1 has a higher elastic coefficient in the movement direction (the first direction) of the mover assembly 3 than the V-shaped spring in the prior art, thereby improving the vibration stability of the linear vibration motor.

[0047] Specifically, as shown in FIG. 1, the spring sheet 1 is connected to the inner side wall of the motor housing and the outer side wall of the mover assembly 3, and the spring sheet 1 is arranged in the motor housing. Figures 3 to 5As shown, the intermediate segment 12 includes a third straight segment 121, a fourth straight segment 122, and a fifth straight segment 123. One end of the third straight segment 121 is connected to the first straight segment 11 at a first obtuse angle, and the other end is connected to one end of the fourth straight segment 122 at a third obtuse angle. The openings of the first and third obtuse angles face opposite directions. The other end of the fourth straight segment 122 is connected to one end of the fifth straight segment 123 at a fourth obtuse angle, and the other end of the fifth straight segment 123 is connected to the second straight segment 13 at a second obtuse angle. The openings of the fourth and second obtuse angles face opposite directions. This arrangement increases the bending structure in the spring sheet 1, and since all the bends in the bending structure are obtuse angles, it ensures that the spring sheet 1 occupies less space and further improves the elastic coefficient of the spring sheet 1, thereby further improving the vibration stability of the linear vibration motor.

[0048] More specifically, a first arc segment 124 connects the third straight segment 121 and the fourth straight segment 122; a second arc segment 125 connects the fourth straight segment 122 and the fifth straight segment 123. The arrangement of the first arc segment 124 and the second arc segment 125 ensures a smooth transition at the included angle, which helps to ensure structural strength and facilitates bending and shaping.

[0049] More specifically, a third arc segment 14 connects the first straight segment 11 and the middle segment 12; a fourth arc segment 15 connects the second straight segment 13 and the middle segment 12. The arrangement of the third arc segment 14 and the fourth arc segment 15 ensures a smooth transition at the included angle, which helps to ensure structural strength and facilitates bending.

[0050] Specifically, the two opposite sides of the middle section 12 are recessed towards the center to form a widening groove 126. The widening groove 126 reduces the width of part of the middle section 12, so that the stress at both ends of the spring sheet 1 is distributed to the middle part to ensure that the stress at both ends is equal.

[0051] More specifically, the inner wall of the narrowing groove 126 is an arc-shaped surface. The arc-shaped surface makes the width of the middle section 12 gradually decrease, avoiding excessive stress concentration that could affect the elastic coefficient of the spring sheet 1.

[0052] Specifically, the spring sheet 1 is a one-piece molded structure, which is easy to process, not easy to break, and has a long service life.

[0053] Specifically, in this embodiment, such as Figure 1 As shown, a spring plate 1 is provided at both ends of the moving part assembly 3 along the first direction. One end of the first straight section 11 of the spring plate 1 is connected to the inner side wall of the bottom shell 21, and the other end of the second straight section 13 is connected to the outer side wall of the mass block 31.

[0054] Specifically, such as Figure 2As shown, the linear vibration motor provided by the embodiment further comprises a spring sheet connecting assembly, the spring sheet connecting assembly comprises a first welding sheet 51 and a second welding sheet 52, the first straight section 11 is welded to the inner side wall of the motor shell through the first welding sheet 51, and the second straight section 13 is welded to the outer side wall of the mover assembly 3 through the second welding sheet 52. The first welding sheet 51 realizes welding of the first straight section 11 and the motor shell, and the second welding sheet 52 realizes welding of the second straight section 13 and the mover assembly 3.

[0055] More specifically, the spring sheet connecting assembly further comprises a first gasket 53 and a second gasket 54, the first gasket 53 is welded to a side of the first straight section 11 away from the first welding sheet 51, and the second gasket 54 is welded to a side of the second straight section 13 away from the second welding sheet 52, the first gasket 53 and the second gasket 54 are arranged to limit the moving distance of the spring sheet 1 in the first direction, so as to avoid collision between the spring sheet 1 and the inner side wall of the motor shell and the outer side wall of the mover assembly 3.

[0056] In the embodiment, the first gasket 53 is welded to the first welding sheet 51, and the second gasket 54 is welded to the second welding sheet 52. Such arrangement improves the firmness of the connection between the first straight section 11 and the motor shell and the firmness of the connection between the second straight section 13 and the mover assembly 3.

[0057] Further specifically, the first welding sheet 51 is welded to the bottom wall of the bottom shell 21, which further improves the firmness of the fixation of the first straight section 11.

[0058] Specifically, a side of the second gasket 54 away from the second straight section 13 is provided with a buffer block 55. The buffer block 55 plays a buffering role when the mover assembly 3 moves close to the inner side wall of the bottom shell 21.

[0059] Optionally, the buffer block 55 can be a rubber block, a silica gel block, a spring structure, etc., as long as it has an elastic structure. In the embodiment, the buffer block 55 is a rubber block and is fixed to the second gasket 54 by glue.

[0060] Specifically, as shown in FIG. 4, the buffer block 55 is fixed to the second gasket 54 by glue. Figure 1 and Figure 6As shown, the two end portions of the mass block 31 of the mover assembly 3 along the first direction are spring sheet matching portions, which include a welding recess portion 3111, a first surface 3112, a second surface 3113, a third surface 3114 and a gasket avoiding recess portion 3115 arranged in sequence along a second direction perpendicular to the first direction, the first direction, the second direction and the third direction are perpendicular to each other, the welding recess portion 3111 is recessed towards the middle portion of the mass block 31 relative to the first surface 3112, and a second welding sheet 52 is welded therein, one end of the first surface 3112 away from the welding recess portion 3111 extends obliquely towards the middle portion of the mass block 31, and the other end is connected to one end of the second surface 3113, the other end of the second surface 3113 extends obliquely towards the middle portion of the mass block 31 relative to the first surface 3112, and the end portion is connected to one end of the third surface 3114, the other end of the third surface 3114 extends along the second direction, and the gasket avoiding recess portion 3115 is recessed towards the middle portion of the mass block 31 relative to the third surface 3114. In this way, the area surrounded by the mass block 31 and the inner side wall of the bottom shell 21 is more suitable for the active deformation of the spring sheet 1, and the gasket avoiding recess portion 3115 is used to avoid the first gasket 53.

[0061] Specifically, as shown in Figure 2 and Figure 6 , the shape of the side wall of the bottom shell 21 at both ends along the first direction is basically the same as that of the spring sheet matching portion of the mass block 31. Specifically, the side wall of the bottom shell 21 at both ends along the first direction includes a first straight section, an inclined section and a second straight section arranged in sequence along the second direction, the first straight section extends along the second direction and is spaced apart and directly opposite to the welding recess portion 3111 and the first surface 3112 of the mass block 31 in the first direction, the inclined section is arranged in parallel with the second surface 3113, the second straight section extends along the second direction and is spaced apart and directly opposite to the third surface 3114 and the gasket avoiding recess portion 3115 in the first direction, the first welding sheet 51 is welded to the inner wall of the second straight section, and the first gasket 53 is welded to the side of the first straight section 11 away from the first welding sheet 51, so that the first gasket 53 is directly opposite to the gasket avoiding recess portion 3115 in the first direction, and when the mass block 31 vibrates in the first direction, the first gasket 53 can move into the gasket avoiding recess portion 3115, that is, the gasket avoiding recess portion 3115 plays a role in avoiding the first gasket 53. The structure of the bottom shell 21 not only adapts to the active deformation of the spring sheet 1, but also reduces the overall size of the motor housing, further reducing the space occupation.

[0062] The linear vibration motor provided by the present embodiment is subjected to finite element simulation vibration, and compared with the V-shaped spring motor in the prior art, the simulation data list is as follows:

[0063] The X direction, Y direction and Z direction in the following list respectively refer to the first direction, second direction and third direction in the embodiment.

[0064]

[0065] From the simulation data, the advantages of the linear vibration motor of the embodiment are obvious. First, the spring sheet 1 in the embodiment is a single-layer structure, and its motion mode is relatively simple and stable, which can save more motor space, increase the volume of the mass block 31, improve the vibration feeling, and reduce the overall volume of the linear vibration motor. Second, the Kx of the embodiment is smaller, which can save the power consumed by the linear vibration motor. The Ky and Kz of the embodiment are larger, which can suppress unnecessary modes when the linear vibration motor vibrates in the X direction.

[0066] Figure 7 The equivalent stress distribution diagrams of the two spring sheets 1 of the linear vibration motor of the embodiment when the X direction displacement is 0.8mm are obtained through finite element simulation, and it can be seen from the diagram that the equivalent stress on the two ends of the spring sheet 1 is relatively average.

[0067] Obviously, the above embodiment of the application is only an example for clear illustration of the application, and is not a limitation on the embodiments of the application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the claims of the application.

Claims

1. A spring sheet, characterized in that, It includes a first straight section (11), a middle section (12), and a second straight section (13). One end of the first straight section (11) can be connected to the inner wall of the motor housing, and the other end is connected to one end of the middle section (12) at a first obtuse angle. The other end of the middle section (12) is connected to one end of the second straight section (13) at a second obtuse angle. The other end of the second straight section (13) can be connected to the outer wall of the mover assembly (3). The openings of the first obtuse angle and the second obtuse angle face opposite directions. The intermediate segment (12) includes a third straight segment (121), a fourth straight segment (122), and a fifth straight segment (123). One end of the third straight segment (121) is connected to the first straight segment (11) at a first obtuse angle, and the other end is connected to one end of the fourth straight segment (122) at a third obtuse angle. The openings of the first and third obtuse angles face opposite directions. The other end of the fourth straight segment (122) is connected to one end of the fifth straight segment (123) at a fourth obtuse angle, and the other end of the fifth straight segment (123) is connected to the second straight segment (13) at a second obtuse angle. The openings of the fourth and second obtuse angles face opposite directions. A first arc segment (124) connects the third straight segment (121) and the fourth straight segment (122). A second arc segment (125) connects the fourth straight segment (122) and the fifth straight segment (123).

2. The spring sheet according to claim 1, characterized in that, A third arc segment (14) connects the first straight segment (11) and the middle segment (12). A fourth arc segment (15) connects the second straight segment (13) and the middle segment (12).

3. The spring sheet according to claim 1, characterized in that, The two opposite sides of the middle section (12) are recessed towards the center to form a widening groove (126).

4. The spring sheet according to any one of claims 1-3, characterized in that, The spring sheet (1) is a one-piece molded structure.

5. A linear vibration motor, comprising a motor housing, a stator assembly (4), and a mover assembly (3), wherein the stator assembly (4) and the mover assembly (3) are both disposed within the motor housing, characterized in that, It also includes at least two spring plates (1) as described in any one of claims 1-4, wherein at least one spring plate (1) is provided at both ends of the mover assembly (3) along the first direction, one end of the first straight section (11) of the spring plate (1) is connected to the inner side wall of the motor housing, and the other end of the second straight section (13) is connected to the outer side wall of the mover assembly (3).

6. The linear vibration motor according to claim 5, characterized in that, It also includes a spring plate connecting assembly, which includes a first welding piece (51) and a second welding piece (52). The first straight section (11) is welded to the inner wall of the motor housing through the first welding piece (51), and the second straight section (13) is welded to the outer wall of the mover assembly (3) through the second welding piece (52).

7. The linear vibration motor according to claim 6, characterized in that, The spring sheet connection assembly further includes a first gasket (53) and a second gasket (54), wherein the first gasket (53) is welded to the side of the first straight section (11) opposite to the first welded piece (51), and the second gasket (54) is welded to the side of the second straight section (13) opposite to the second welded piece (52).

8. The linear vibration motor according to claim 6, characterized in that, The moving part assembly (3) includes a mass block (31), the two ends of which along the first direction are spring plate mating parts. The spring plate mating parts include a welding recess (3111), a first surface (3112), a second surface (3113), a third surface (3114), and a gasket clearance recess (3115) arranged sequentially along a second direction perpendicular to the first direction. The welding recess (3111) is recessed towards the center of the mass block (31) relative to the first surface (3112), and a second welding piece (52) is welded therein. The first surface (3112) One end of the weld recess (3111) extends obliquely toward the center of the mass block (31) away from the weld recess (3111), and the other end is connected to one end of the second surface (3113). The other end of the second surface (3113) extends obliquely toward the center of the mass block (31) relative to the first surface (3112), and the end of the second surface (3114) is connected to one end of the third surface (3114). The other end of the third surface (3114) extends along the second direction. The gasket clearance recess (3115) is recessed toward the center of the mass block (31) relative to the third surface (3114).

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