Vibration exciter and electronic device

Abstract

The application discloses a kind of vibration exciter and electronic equipment, it is related to vibration device technical field, the vibration exciter includes shell, the vibrator subassembly and stator subassembly being housed in shell, vibrator subassembly is suspended in shell by elastic support piece, one of vibrator subassembly and stator subassembly includes magnetic circuit assembly, another includes coil assembly;Elastic support piece includes first fixed part, second fixed part and elastic arm, vibrator subassembly can vibrate along first direction, first fixed part and second fixed part are located the same side of vibrator subassembly along second direction;Two sides of vibrator subassembly along first direction are each equipped with elastic arm, elastic arm includes first curved part, second curved part and connecting part, the distance between the two ends of first curved part and second curved part away from connecting part is less than the distance between the two ends of first curved part and second curved part close to connecting part.The application can reduce noise, while it is beneficial to promote the vibration feeling of product at low frequency.

Description

Technical Field

[0001] This invention relates to the field of vibration device technology, and in particular to a vibration exciter and electronic device. Background Technology

[0002] With the development of electronic technology, portable consumer electronics products are becoming increasingly popular, such as mobile phones, handheld game consoles, navigation devices, or handheld multimedia entertainment devices. These electronic products generally use vibration motors for system feedback, such as incoming call alerts, message alerts, navigation alerts, and vibration feedback from game consoles.

[0003] In related technologies, linear vibration motors are core components that provide tactile experience in consumer electronics products. In order to achieve better performance, large vibration motors have become the mainstream trend in product development in recent years. However, large vibration products are prone to noise problems after assembly, and at the same time, they place higher demands on the spring sheet structure. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a vibration exciter and electronic device with low noise and good performance.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] On one hand, embodiments of the present invention provide a vibration exciter, including a housing, an oscillator assembly and a stator assembly housed within the housing, wherein:

[0007] The oscillator assembly is suspended in the housing by an elastic support member. One of the oscillator assembly and the stator assembly includes a magnetic circuit assembly, and the other includes a coil assembly.

[0008] The elastic support includes a first fixing part connected to the housing, a second fixing part connected to the oscillator assembly, and a spring arm connecting the first fixing part and the second fixing part. The oscillator assembly is capable of vibrating along a first direction. The first fixing part and the second fixing part are both located on the same side of the oscillator assembly along a second direction. The first direction and the second direction are perpendicular.

[0009] The oscillator assembly is provided with spring arms on both sides along the first direction. The plane of the spring arm is perpendicular to the first direction. The spring arm includes a first curved part connected to the first fixed part, a second curved part connected to the second fixed part, and a connecting part connecting the first curved part and the second curved part. The distance between the two ends of the first curved part and the second curved part away from the connecting part is less than the distance between the two ends of the first curved part and the second curved part close to the connecting part.

[0010] In some embodiments of the present invention, the height of the first fixing part is higher than the height of the second fixing part.

[0011] In some embodiments of the present invention, the first curved portion is connected to the first fixed portion through a first transition portion, the second curved portion is connected to the second fixed portion through a second transition portion, and the first curved portion and the second curved portion are symmetrically arranged.

[0012] In some embodiments of the present invention, the oscillator assembly has two spring arms on each side along the first direction, the two first curved portions of the two spring arms are close to each other and connected to the first fixing portion, and the two second curved portions of the two spring arms are far apart and connected to the second fixing portion.

[0013] In some embodiments of the present invention, the second fixing portions of the oscillator assembly are arranged in pairs along each side of the first direction and are respectively located on both sides of the first fixing portion along a third direction, the third direction being perpendicular to the first direction and the second direction. The side of the oscillator assembly connected to the second fixing portion is provided with a boss, and a receiving space is formed between the second fixing portions, the boss being located within the receiving space.

[0014] In some embodiments of the present invention, the oscillator assembly includes the magnetic circuit assembly, the magnetic circuit assembly includes an annular magnetic guide plate and a permanent magnet, the permanent magnet includes a first magnet and a second magnet, the first magnet and the second magnet are respectively disposed on opposite sides of the inner surface of the annular magnetic guide plate;

[0015] The stator assembly includes the coil assembly, which includes a coil and a bracket for fixing the coil to the housing, the coil being disposed between the first magnet and the second magnet.

[0016] In some embodiments of the present invention, the coil is attached to the bracket, the axial direction of the coil is perpendicular to the vibration direction of the oscillator assembly, and the magnetization directions of the first magnet and the second magnet are parallel to the axial direction of the coil.

[0017] In some embodiments of the present invention, the first magnet and the second magnet each include at least three magnetized parts, the magnetic pole directions of adjacent magnetized parts in the same magnet are opposite, the magnetic pole directions of opposite magnetized parts in different magnets are the same, and the number of coils is at least two.

[0018] In some embodiments of the present invention, the annular magnetic plate includes a flat first magnetic yoke and a U-shaped second magnetic yoke that are fastened together, wherein the first magnet is fixed to the first magnetic yoke and the second magnet is fixed to the second magnetic yoke;

[0019] And / or, the housing has limiting protrusions on both inner surfaces along the first direction.

[0020] On the other hand, embodiments of the present invention provide an electronic device including the vibration exciter described above.

[0021] The present invention has the following beneficial effects:

[0022] The vibration exciter and electronic device of this invention include an elastic support member in the vibration exciter comprising a first fixing part connected to the housing, a second fixing part connected to the oscillator assembly, and a spring arm connecting the first fixing part and the second fixing part. Both the first fixing part and the second fixing part are located on the same side of the oscillator assembly along a second direction, thus facilitating the connection between the elastic support member and the housing and the oscillator assembly. Spring arms are provided on both sides of the oscillator assembly along the first direction, with the plane of the spring arms perpendicular to the first direction. The spring arms are located on both sides of the oscillator assembly and do not contact the oscillator assembly or the housing, which reduces the noise of the entire vibration exciter, effectively improves the nonlinearity of the product's K-value, and helps improve the vibration sensation of the product at low frequencies. The spring arm includes a first fixing part connected to the first fixing part. The first curved portion is connected, the second curved portion is connected to the second fixed portion, and the connecting portion connects the first curved portion and the second curved portion. The distance between the two ends of the first curved portion and the second curved portion away from the connecting portion is smaller than the distance between the two ends of the first curved portion and the second curved portion near the connecting portion. As a result, the elastic arm has sufficient extension distance, which can distribute the load at the wide end and concentrate the stress at the narrow end, thereby enhancing the vibration effect and improving the vibration quality. In addition, unlike the traditional double V-shaped spring sheet, the one-piece molded elastic support can be completed in one step during assembly, saving manufacturing costs. Moreover, the one-piece molded elastic support can ensure high-precision vibration in the main direction and reduce the offset in other directions, providing a better user experience. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is an exploded structural diagram of the vibration exciter according to an embodiment of the present invention;

[0025] Figure 2 This is a front sectional view of the vibration exciter according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the magnetic pole direction of the magnet in an embodiment of the present invention;

[0027] Figure 4 for Figure 1 A three-dimensional structural diagram of the oscillator assembly is shown, with additional illustration of the elastic support components;

[0028] Figure 5 for Figure 4 3D structural diagram of the medium elastic support component;

[0029] Figure 6 for Figure 4 Side view of the intermediate elastic support component;

[0030] Figure 7 for Figure 1 A schematic diagram showing the connection between the FPC and the shell.

[0031] Figure label:

[0032] 1. Oscillator assembly; 10. Boss; 11. First magnet; 12. Second magnet; 14. First yoke; 15. Second yoke.

[0033] 21. Coil; 22. Bracket; 221. Support plate; 222. Bending plate.

[0034] 3. Elastic support member; 30. Accommodating space; 31. First fixing part; 32. Second fixing part; 33. Spring arm; 331. First bending part; 332. Second bending part; 333. Connecting part; 334. First transition part; 335. Second transition part.

[0035] 41. Upper shell; 411. Limiting protrusion; 42. Middle shell; 421. Groove; 422. Recessed portion; 423. Clearance opening; 43. Lower shell.

[0036] 5. FPC, 51. Main body, 52. Bending section,

[0037] X, the first direction; Z, the second direction; Y, the third direction; N, the north pole of the magnet; S, the south pole of the magnet. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] On the one hand, embodiments of the present invention provide a vibration exciter, such as Figure 1-7 As shown, it includes a housing, an oscillator assembly 1 housed within the housing, and a stator assembly, wherein:

[0040] The oscillator assembly 1 is suspended in the housing by the elastic support 3. One of the oscillator assembly 1 and the stator assembly includes a magnetic circuit assembly and the other includes a coil assembly.

[0041] The elastic support 3 includes a first fixing part 31 connected to the housing, a second fixing part 32 connected to the oscillator assembly 1, and a spring arm 33 connecting the first fixing part 31 and the second fixing part 32. The oscillator assembly 1 can vibrate along a first direction (X direction). The first fixing part 31 and the second fixing part 32 are both located on the same side of the oscillator assembly 1 along a second direction (Z direction) (both are on the upper side in the embodiment shown in the figure). The first direction and the second direction are perpendicular.

[0042] The oscillator assembly 1 has spring arms 33 on both sides along the first direction. The plane of the spring arms 33 is perpendicular to the first direction. The spring arms 33 include a first curved portion 331 connected to the first fixed portion 31, a second curved portion 332 connected to the second fixed portion 32, and a connecting portion 333 connecting the first curved portion 331 and the second curved portion 332. The distance L1 between the two ends of the first curved portion 331 and the second curved portion 332 away from the connecting portion 333 is less than the distance L2 between the two ends of the first curved portion 331 and the second curved portion 332 near the connecting portion 333. In a specific implementation, the elastic support member 3 can be integrally formed by bending a sheet metal part.

[0043] In use, after the coil assembly is energized, it interacts with the magnetic field generated by the magnetic circuit assembly. The elastic support 3 includes a first fixing part 31 connected to the housing, a second fixing part 32 connected to the oscillator assembly 1, and a spring arm 33 connecting the first fixing part 31 and the second fixing part 32. Under the action of the spring arm 33, the oscillator assembly 1 vibrates along a first direction (e.g., Figure 4 (As shown); when the driving electrical signal of the coil assembly is an alternating signal, the oscillator assembly 1 is subjected to an alternating force, causing the oscillator assembly 1 to reciprocate along the first direction and generate vibration.

[0044] The vibration exciter of this embodiment includes an elastic support 3 comprising a first fixing part 31 connected to the housing, a second fixing part 32 connected to the oscillator assembly 1, and a spring arm 33 connecting the first fixing part 31 and the second fixing part 32. The first fixing part 31 and the second fixing part 32 are both located on the same side of the oscillator assembly 1 along the second direction, thus facilitating the connection between the elastic support 3 and the housing. The oscillator assembly 1 has spring arms 33 on both sides along the first direction. The plane of the spring arms 33 is perpendicular to the first direction. The spring arms 33 are located on both sides of the oscillator assembly 1 and do not contact the oscillator assembly 1 or the housing, which reduces the noise of the entire vibration exciter, effectively improves the nonlinearity of the product's K-value, and helps improve the vibration sensation of the product at low frequencies. The spring arm 33 includes a first bending part 331 connected to the first fixing part 31, a second bending part 32 connected to the second fixing part 31, and a second bending part 33 connected to the first fixing part 31. The second curved portion 332 connected to the fixed portion 32, and the connecting portion 333 connecting the first curved portion 331 and the second curved portion 332, the distance L1 between the two ends of the first curved portion 331 and the second curved portion 332 away from the connecting portion 333 is smaller than the distance L2 between the two ends of the first curved portion 331 and the second curved portion 332 near the connecting portion 333. As a result, the elastic arm 33 has a sufficient extension distance, which can distribute the load at the wide end (L2) and concentrate the stress at the narrow end (L1), thereby enhancing the vibration effect and improving the vibration quality. In addition, unlike the traditional double V-shaped spring sheet, the one-piece molded elastic support 3 can be completed in one step during assembly, saving manufacturing costs. Moreover, the one-piece molded elastic support 3 can ensure high-precision vibration in the main direction and reduce the offset in other directions, providing a better user experience.

[0045] like Figure 1-6 As shown, in some embodiments of the present invention, the height of the first fixing part 31 is higher than the height of the second fixing part 32. Thus, due to the height difference, it is convenient to fix the first fixing part 31 and the second fixing part 32 to the housing and the oscillator assembly 1 respectively, avoiding interference.

[0046] In some embodiments of the present invention, the first curved portion 331 is connected to the first fixed portion 31 via a first transition portion 334, and the second curved portion 332 is connected to the second fixed portion 32 via a second transition portion 335, with the first curved portion 331 and the second curved portion 332 arranged symmetrically. In specific implementations, the first transition portion 334 and the second transition portion 335 are at least partially arc-shaped. This connection between the curved portion and the fixed portion via the transition portion effectively increases elasticity and extends service life.

[0047] In some embodiments of the present invention, the oscillator assembly 1 has two spring arms 33 on each side along the first direction. The two first curved portions 331 of the two spring arms 33 are close to each other and connected to the first fixed portion 31, while the two second curved portions 332 of the two spring arms 33 are far apart and connected to the second fixed portion 32. In this way, with two spring arms 33 on each side and this specific arrangement (the two first curved portions 331 are close to each other and the two second curved portions 332 are far apart), the spring arms 33 will not overlap each other. This not only further increases the elasticity and enhances the vibration effect, but also ensures that the oscillator assembly 1 is subjected to uniform force during vibration and suppresses stray vibrations in non-primary directions (Y direction, Z direction).

[0048] In some embodiments of the present invention, the second fixing portions 32 on each side of the oscillator assembly 1 along the first direction are arranged in pairs and are respectively located on both sides of the first fixing portion 31 along the third direction (Y direction). The third direction is perpendicular to the first direction and the second direction. A boss 10 is provided on the side of the oscillator assembly 1 connected to the second fixing portion 32. A receiving space 30 is formed between the second fixing portions 32, and the boss 10 is located within the receiving space 30. In this way, the boss 10 is located within the receiving space 30, which enables the rapid positioning and installation of the elastic support member 3 and improves production efficiency.

[0049] In some embodiments of the present invention, the oscillator assembly 1 includes a magnetic circuit assembly, which includes an annular magnetic guide plate and permanent magnets. The permanent magnets include a first magnet 11 and a second magnet 12, which are respectively disposed on opposite sides of the inner surface of the annular magnetic guide plate. The stator assembly includes a coil assembly, which includes a coil 21 and a bracket 22 for fixing the coil 21 to the housing. The coil 21 is disposed between the first magnet 11 and the second magnet 12. In this way, the annular magnetic guide plate encloses the first magnet 11 and the second magnet 12, thereby limiting magnetic leakage and achieving good performance.

[0050] The annular magnetic guide plate can take various structural forms readily conceived by those skilled in the art, such as an integral design. However, to facilitate the assembly of components (such as magnets), in some embodiments of the present invention, the annular magnetic guide plate includes a flat first magnetic yoke 14 and a U-shaped second magnetic yoke 15 that are snap-fitted together. A first magnet 11 is fixed to the first magnetic yoke 14, and a second magnet 12 is fixed to the second magnetic yoke 15. Thus, the first magnet 11, the second magnet 12, the first magnetic yoke 14, and the second magnetic yoke 15 together constitute the oscillator assembly 1, facilitating the installation of the first magnet 11 and the second magnet 12. In the embodiment shown in the figure, the boss 10 is located on the upper surface of the first magnetic yoke 14; the first magnetic yoke 14 and the second magnetic yoke 15 are connected by welding, thus maintaining overall strength and robustness. Furthermore, the first magnetic yoke 14 and the second magnetic yoke 15 can also be connected by snap-fit ​​for easy installation and disassembly.

[0051] In some embodiments of the present invention, limiting protrusions 411 may be provided on the inner surfaces of both sides of the housing along the first direction. In the embodiment shown in the figure, that is, the upper shell 41 is provided with limiting protrusions 411 on both sides along the first direction. In specific implementation, the middle of both sides of the upper shell 41 may be provided with recessed grooves / convex bulges to form limiting protrusions 411. The limiting protrusions 411 cooperate with the vibrator assembly 1 for drop limiting, improving the mechanical reliability of the product, and also protecting the elastic support member 3.

[0052] In some embodiments of the present invention, the coil 21 can be attached to the bracket 22, with the axial direction of the coil 21 perpendicular to the vibration direction of the oscillator assembly 1, and the magnetization direction of the first magnet 11 and the second magnet 12 parallel to the axial direction of the coil 21. In specific implementations, the coil 21 and the bracket 22 can be bonded together and welded to the housing for fixation.

[0053] like Figure 1-3 As shown, in some embodiments of the present invention, the first magnet 11 and the second magnet 12 may each include at least three magnetized sections. Adjacent magnetized sections within the same magnet have opposite magnetic pole directions, while opposite magnetized sections within different magnets have the same magnetic pole direction. The number of coils 21 is at least two. Thus, multiple magnetized sections and multiple coils not only achieve a multi-pole structure and improve control precision, but also enhance the uniformity and density of the magnetic field distribution, thereby reducing hysteresis and eddy current losses.

[0054] like Figure 1-2 As shown, in some embodiments of the present invention, the housing may include an upper shell 41, a middle shell 42, and a lower shell 43. Specifically, the housing can be integrally formed by welding the upper shell 41, middle shell 42, and lower shell 43, or by snap-fitting the upper shell 41, middle shell 42, and lower shell 43 together. The embodiment shown in the figure uses snap-fitting, which facilitates assembly and ensures a stable structure. In the embodiment shown in the figure, the first fixing part 31 is welded to the upper shell 41, and the limiting protrusion 411 is also provided on the upper shell 41. Furthermore, one of the upper shell 41 and the lower shell 43 can be integrally formed with the middle shell 42 to reduce the number of parts.

[0055] In some embodiments of the present invention, the bracket 22 may include a support plate 221 for supporting the coil 21. The support plate 221 has bent plates 222 on both sides perpendicular to the vibration direction, and the bent plates 222 are fixedly connected to the middle shell 42 (specifically, they can be welded to achieve a close fit). This facilitates the installation and fixation of the coil 21, and the fixing effect is good.

[0056] like Figure 1 and Figure 7As shown, in some embodiments of the present invention, the middle shell 42 connects two opposite sidewalls of the support 22, and its middle portion can protrude outward to form an internal groove 421. The groove 421 has inwardly recessed portions 422 on both sides along the vibration direction, and the end of the support 22 is disposed within the groove 421. In this way, while ensuring that the coil 21 and the support 22 are of the same size, the recessed portions 422 on both sides can reduce the product volume.

[0057] In some embodiments of the present invention, the vibration exciter may include an FPC 5 (Flexible Printed Circuit) fixed to the outer wall of the middle shell 42. The FPC 5 includes a main body 51 and bent portions 52 located on both sides of the main body 51. That is, the FPC 5 is fixed to three adjacent side walls of the middle shell 42, thus ensuring good fixation of the FPC 5 and facilitating connection to external circuits. In specific implementations, the main body 51 may be provided with large solder pads (indicated by the symbols "+" and "-" in the figure) for electrical connection to external circuits, and the end of the bent portion 52 may be provided with small solder pads for electrical connection to the leads of the coil 21. To facilitate the connection of the leads of the coil 21 to the small solder pads, a clearance opening 423 may be provided at the connection between the groove 421 and the recessed portion 422. The large pads of the FPC5 are integrated into a single structure on the middle frame side to ensure relative positional accuracy. This allows for electrical connection requirements to be met with just one FPC5, reducing costs. The smaller pads on both sides facilitate the alignment of the start and end wires of the coil 21, providing ample operating space and reducing the resistance of the FPC5. In the embodiment shown in the figure, the coil 21 is bonded to the bracket 22 as a single unit. After the bracket 22 is welded to the middle shell 42, the upper shell 41 and lower shell 43 are welded on. The FPC5 is then glued to the middle shell 42 to form the stator assembly. Furthermore, the recessed portion 422 provides a clearly defined mounting area for the end of the bent portion 52 of the FPC5, preventing the FPC5 from shifting or warping during assembly or use, ensuring a secure fixation and facilitating the connection of the coil 21 leads.

[0058] On the other hand, embodiments of the present invention provide an electronic device including the aforementioned vibration exciter. The structure of the vibration exciter is the same as described above, and will not be repeated here. The electronic device may include mobile phones, game consoles, etc.

[0059] The electronic device of this invention includes a vibration exciter. The elastic support 3 in the vibration exciter includes a first fixing part 31 connected to a housing, a second fixing part 32 connected to a vibrator assembly 1, and a spring arm 33 connecting the first fixing part 31 and the second fixing part 32. The first fixing part 31 and the second fixing part 32 are both located on the same side of the vibrator assembly 1 along a second direction, thus facilitating the connection between the elastic support 3 and the housing and the vibrator assembly 1. The vibrator assembly 1 has spring arms 33 on both sides along the first direction. The plane of the spring arms 33 is perpendicular to the first direction. The spring arms 33 are located on both sides of the vibrator assembly 1 and do not contact the vibrator assembly 1 or the housing, which can reduce the noise of the entire vibration exciter, effectively improve the nonlinearity of the product's K-value, and help improve the product's vibration sensation at low frequencies. The spring arm 33 includes a first bending part 3 connected to the first fixing part 31. 31. The second curved portion 332 connected to the second fixed portion 32, and the connecting portion 333 connecting the first curved portion 331 and the second curved portion 332, the distance L1 between the two ends of the first curved portion 331 and the second curved portion 332 away from the connecting portion 333 is less than the distance L2 between the two ends of the first curved portion 331 and the second curved portion 332 near the connecting portion 333. Thus, the elastic arm 33 has sufficient extension distance, which can distribute the load at the wide end (L2) and concentrate the stress at the narrow end (L1), thereby enhancing the vibration effect and improving the vibration quality. In addition, unlike the traditional double V-shaped spring sheet, the one-piece molded elastic support 3 can be completed in one step during assembly, saving process costs. Moreover, the one-piece molded elastic support 3 can ensure high-precision vibration in the main direction and reduce the offset in other directions, providing a better user experience.

[0060] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vibration exciter, characterized in that, Includes a housing, an oscillator assembly housed within the housing, and a stator assembly, wherein: The oscillator assembly is suspended in the housing by an elastic support member. One of the oscillator assembly and the stator assembly includes a magnetic circuit assembly, and the other includes a coil assembly. The elastic support includes a first fixing part connected to the housing, a second fixing part connected to the oscillator assembly, and a spring arm connecting the first fixing part and the second fixing part. The oscillator assembly is capable of vibrating along a first direction. The first fixing part and the second fixing part are both located on the same side of the oscillator assembly along a second direction. The first direction and the second direction are perpendicular. The oscillator assembly is provided with spring arms on both sides along the first direction. The plane of the spring arm is perpendicular to the first direction. The spring arm includes a first curved part connected to the first fixed part, a second curved part connected to the second fixed part, and a connecting part connecting the first curved part and the second curved part. The distance between the two ends of the first curved part and the second curved part away from the connecting part is less than the distance between the two ends of the first curved part and the second curved part close to the connecting part.

2. The vibration exciter according to claim 1, characterized in that, The height of the first fixing part is higher than the height of the second fixing part.

3. The vibration exciter according to claim 1, characterized in that, The first curved portion is connected to the first fixed portion through a first transition portion, and the second curved portion is connected to the second fixed portion through a second transition portion. The first curved portion and the second curved portion are arranged symmetrically.

4. The vibration exciter according to claim 1, characterized in that, The oscillator assembly has two spring arms on each side along the first direction. The two first curved portions of the two spring arms are close to each other and connected to the first fixing portion, while the two second curved portions of the two spring arms are far apart and connected to the second fixing portion.

5. The vibration exciter according to claim 4, characterized in that, The second fixing parts of the oscillator assembly are arranged in pairs along each side of the first direction and are respectively located on both sides of the first fixing part along a third direction. The third direction is perpendicular to the first direction and the second direction. The side of the oscillator assembly connected to the second fixing part is provided with a boss. An accommodating space is formed between the second fixing parts, and the boss is located in the accommodating space.

6. The vibration exciter according to claim 1, characterized in that, The oscillator assembly includes the magnetic circuit assembly, which includes an annular magnetic guide plate and a permanent magnet. The permanent magnet includes a first magnet and a second magnet, which are respectively disposed on opposite sides of the inner surface of the annular magnetic guide plate. The stator assembly includes the coil assembly, which includes a coil and a bracket for fixing the coil to the housing, the coil being disposed between the first magnet and the second magnet.

7. The vibration exciter according to claim 6, characterized in that, The coil is attached to the bracket, and the axial direction of the coil is perpendicular to the vibration direction of the oscillator assembly. The magnetization directions of the first magnet and the second magnet are parallel to the axial direction of the coil.

8. The vibration exciter according to claim 7, characterized in that, The first magnet and the second magnet each include at least three magnetized parts. The magnetic poles of adjacent magnetized parts in the same magnet have opposite directions, while the magnetic poles of opposite magnetized parts in different magnets have the same direction. The number of coils is at least two.

9. The vibration exciter according to claim 6, characterized in that, The annular magnetic plate includes a flat first magnetic yoke and a U-shaped second magnetic yoke that are fastened together. The first magnet is fixed to the first magnetic yoke, and the second magnet is fixed to the second magnetic yoke. And / or, the housing has limiting protrusions on both inner surfaces along the first direction.

10. An electronic device, characterized in that, Includes the vibration exciter as described in any one of claims 1-9.

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