Vibration exciter and electronic apparatus

Abstract

The invention discloses a vibration exciter and electronic equipment, and relates to the technical field of vibration devices.The vibration exciter comprises a shell, a vibrator assembly and a stator assembly, the vibrator assembly and the stator assembly are contained in the shell, the vibrator assembly is suspended in the shell through an elastic supporting piece, and one of the vibrator assembly and the stator assembly comprises a magnetic circuit assembly; the other comprises a coil assembly; the elastic supporting piece comprises a first fixing part, a second fixing part and an elastic arm, the vibrator assembly can vibrate in the first direction, and the first fixing part and the second fixing part are located on the same side of the vibrator assembly in the second direction; elastic arms are arranged on the two sides, in the first direction, of the vibrator assembly, each elastic arm comprises a first bent part, a second bent part and a connecting part, and the distance between the two ends, away from the connecting part, of the first bent part and the second bent part is smaller than the distance between the two ends, close to the connecting part, of the first bent part and the second bent part. Noise can be reduced, and meanwhile the vibration sense of a product at low frequency can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vibration devices, in particular to a vibration exciter and electronic equipment. BACKGROUND

[0002] With the development of electronic technology, portable consumer electronic products are more and more popular, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices, etc. These electronic products generally use vibration motors for system feedback, such as incoming call prompts, information prompts, navigation prompts, and vibration feedback of game consoles.

[0003] In related technologies, linear vibration motors are the core components of consumer electronic products to provide tactile experience. In order to achieve better use effect, large vibration feeling motors have become the mainstream trend of product development in recent years. However, large vibration feeling products are prone to noise problems after assembly, and higher requirements are put forward for the structure of the elastic sheet. SUMMARY

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

[0005] To solve the above technical problems, the technical solutions of the present application are as follows: On the one hand, the present application provides a vibration exciter, comprising a shell, a vibrator assembly and a stator assembly accommodated in the shell, wherein: The vibrator assembly is suspended in the shell by an elastic support, one of the vibrator assembly and the stator assembly comprises a magnetic circuit assembly, and the other comprises a coil assembly; The elastic support comprises a first fixed part connected with the shell, a second fixed part connected with the vibrator assembly, and an elastic arm connecting the first fixed part and the second fixed part, the vibrator assembly can vibrate in a first direction, the first fixed part and the second fixed part are located on the same side of the vibrator assembly in a second direction, and the first direction and the second direction are perpendicular; Both sides of the vibrator assembly along the first direction are provided with the elastic arm, the plane where the elastic arm is located is perpendicular to the first direction, the elastic arm comprises a first curved part connected with the first fixed part, a second curved part connected with 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.

[0006] In some embodiments of the present application, the height of the first fixed part is higher than the height of the second fixed part.

[0007] In some embodiments of the present application, 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, and the first curved portion and the second curved portion are symmetrically arranged.

[0008] In some embodiments of the present application, the two elastic arms on each side of the first direction have two first curved portions close to each other and connected to the first fixed portion, and two second curved portions far away from each other and connected to the second fixed portion.

[0009] In some embodiments of the present application, the second fixed portions on each side of the first direction of the vibrator assembly are arranged in pairs and located on both sides of the first fixed portion along a third direction, the third direction being perpendicular to the first direction and the second direction, one side of the vibrator assembly connected to the second fixed portions is provided with a boss, and the second fixed portions form an accommodation space therebetween, and the boss is located in the accommodation space.

[0010] In some embodiments of the present application, the vibrator assembly comprises the magnetic circuit assembly, the magnetic circuit assembly comprises a ring-shaped magnetic conductive plate and permanent magnets, the permanent magnets comprise first magnets and second magnets, and the first magnets and the second magnets are respectively arranged on opposite sides of the inner surface of the ring-shaped magnetic conductive plate. The stator assembly comprises the coil assembly, the coil assembly comprises a coil and a bracket for fixing the coil to the shell, and the coil is arranged between the first magnets and the second magnets.

[0011] In some embodiments of the present application, the coil is attached to the bracket, the axis direction of the coil is perpendicular to the vibration direction of the vibrator assembly, and the magnetization directions of the first magnets and the second magnets are parallel to the axis direction of the coil.

[0012] In some embodiments of the present application, the first magnets and the second magnets each comprise at least three magnetized portions, the magnetic pole directions of adjacent magnetized portions in the same magnet are opposite, the magnetic pole directions of opposite magnetized portions in different magnets are the same, and the number of coils is at least two.

[0013] In some embodiments of the present application, the ring-shaped magnetic conductive plate comprises a first flat yoke and a second U-shaped yoke connected by buckling, the first magnets are fixed to the first yoke, and the second magnets are fixed to the second yoke. And / or, the inner surface of the shell on both sides of the first direction is provided with a limiting protrusion.

[0014] In another aspect, the embodiments of the present application provide an electronic device comprising the above-described vibration exciter.

[0015] The present application has the following advantages: The vibration exciter and the electronic device of the embodiment of the present application, the elastic support of the vibration exciter comprises a first fixed part connected with the shell, a second fixed part connected with the vibrator assembly, and an elastic arm connecting the first fixed part and the second fixed part, and the first fixed part and the second fixed part are both located on the same side of the vibrator assembly along the second direction, so that the elastic support is convenient to connect the shell and the vibrator assembly; the elastic arm is located on both sides of the vibrator assembly along the first direction, the plane where the elastic arm is located is perpendicular to the first direction, the elastic arm is located on both sides of the vibrator assembly and does not contact the vibrator assembly and the shell, which can reduce the noise of the whole vibration exciter, effectively improve the nonlinearity of the K value of the product, and is beneficial to improve the vibration feeling of the product at low frequency; the elastic arm comprises a first bending part connected with the first fixed part, a second bending part connected with the second fixed part, and a connecting part connecting the first bending part and the second bending part, the distance between the two ends of the first bending part and the second bending part away from the connecting part is less than the distance between the two ends of the first bending part and the second bending part close to the connecting part, so that the elastic arm has sufficient extension distance, can disperse the load at the wide end, can concentrate the stress at the narrow end, enhances the vibration effect, and improves the vibration texture; in addition, unlike the traditional double-V-shaped elastic sheet, the integrally formed elastic support can be completed in one step during assembly, saves process cost, and the integrally formed elastic support can ensure high-precision vibration in the main direction, reduce the offset amount in other directions, and provide better experience. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which: Figure 1 It is an explosion structure diagram of the vibration exciter of the embodiment of the present application; Figure 2 It is a front cross-sectional view of the vibration exciter of the embodiment of the present application; Figure 3 It is a schematic diagram of the magnetic pole direction of the magnet in the embodiment of the present application; Figure 4 It is Figure 1 It is a three-dimensional structure diagram of the vibrator assembly and additionally shows the elastic support; Figure 5 It is Figure 4 It is a three-dimensional structure diagram of the elastic support in the embodiment of the present application; Figure 6 It is Figure 4 It is a side view structure diagram of the elastic support in the embodiment of the present application; Figure 7 It is Figure 1 It is a schematic diagram of the connection relationship between the FPC and the shell in the embodiment of the present application.

[0017] Reference signs: 1. Vibrator assembly, 10. Boss, 11. First magnet, 12. Second magnet, 14. First yoke, 15. Second yoke, 21. Coil, 22. Bracket, 221. Support plate, 222. Bending plate, 3. Elastic support member, 30. Accommodating space, 31. First fixing portion, 32. Second fixing portion, 33. Elastic arm, 331. First bending portion, 332. Second bending portion, 333. Connecting portion, 334. First transition portion, 335. Second transition portion, 41. Upper shell, 411. Limiting protrusion, 42. Middle shell, 421. Groove, 422. Concave portion, 423. Avoidance opening, 43. Lower shell, 5. FPC, 51. Main body, 52. Bending part, X, first direction, Z, second direction, Y, third direction, N, north pole of the magnet, S, south pole of the magnet. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0019] On the one hand, an embodiment of the present invention provides a vibration exciter, such as Figures 1-7 As shown, it includes a housing, a vibrator assembly 1 housed in the housing, and a stator assembly, wherein: The vibrator assembly 1 is suspended in the housing through an elastic support member 3 . One of the vibrator assembly 1 and the stator assembly includes a magnetic circuit assembly, and the other includes a coil assembly.

[0020] The elastic support member 3 includes a first fixing portion 31 connected to the shell, a second fixing portion 32 connected to the vibrator assembly 1, and an elastic arm 33 connecting the first fixing portion 31 and the second fixing portion 32. The vibrator assembly 1 can vibrate along a first direction (X direction). The first fixing portion 31 and the second fixing portion 32 are both located on the same side of the vibrator assembly 1 along the second direction (Z direction) (both on the upper side in the embodiment shown in the figure), and the first direction and the second direction are perpendicular.

[0021] The elastic arm 33 is arranged on both sides of the vibrator assembly 1 along the first direction, and the plane of the elastic arm 33 is perpendicular to the first direction. The elastic arm 33 comprises a first bending part 331 connected with the first fixed part 31, a second bending part 332 connected with the second fixed part 32, and a connecting part 333 connecting the first bending part 331 and the second bending part 332. The distance L1 between the two ends of the first bending part 331 and the second bending part 332 away from the connecting part 333 is smaller than the distance L2 between the two ends of the first bending part 331 and the second bending part 332 close to the connecting part 333. In a specific implementation, the elastic support 3 can be integrally formed by bending a metal plate.

[0022] In use, the coil assembly is energized to interact with the magnetic field generated by the magnetic circuit assembly. The elastic support 3 comprises a first fixed part 31 connected with the shell, a second fixed part 32 connected with the vibrator assembly 1, and an elastic arm 33 connecting the first fixed part 31 and the second fixed part 32. The vibrator assembly 1 vibrates along the first direction under the action of the elastic arm 33 (as shown in FIG. 2). Figure 4 When the driving electric signal of the coil assembly is an alternating signal, the vibrator assembly 1 is subjected to an alternating force, so that the vibrator assembly 1 reciprocates along the first direction to generate vibration.

[0023] The vibrator exciter provided by the embodiment of the present application comprises an elastic support 3, a coil assembly, and a vibrator assembly 1. The elastic support 3 comprises a first fixed part 31 connected with the shell, a second fixed part 32 connected with the vibrator assembly 1, and an elastic arm 33 connecting the first fixed part 31 and the second fixed part 32. The first fixed part 31 and the second fixed part 32 are located on the same side of the vibrator assembly 1 along the second direction. In this way, the elastic support 3 is connected with the shell and the vibrator assembly 1. The vibrator assembly 1 is provided with the elastic arm 33 on both sides along the first direction. The plane of the elastic arm 33 is perpendicular to the first direction. The elastic arm 33 is located on both sides of the vibrator assembly 1 and does not contact the vibrator assembly 1 and the shell, thereby reducing the noise of the entire vibrator exciter, effectively improving the nonlinearity of the K value of the product, and facilitating the improvement of the vibration sensation of the product at low frequencies. The elastic arm 33 comprises a first bending part 331 connected with the first fixed part 31, a second bending part 332 connected with the second fixed part 32, and a connecting part 333 connecting the first bending part 331 and the second bending part 332. The distance L1 between the two ends of the first bending part 331 and the second bending part 332 away from the connecting part 333 is smaller than the distance L2 between the two ends of the first bending part 331 and the second bending part 332 close to the connecting part 333. In this way, the elastic arm 33 has sufficient extension distance, can disperse the load at the wide end (L2), and can 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 elastic sheet, the integrally formed elastic support 3 can be completed in one step during assembly, thereby saving the process cost. The integrally formed elastic support 3 can ensure high-precision vibration in the main direction, reduce the offset in other directions, and provide a better experience.

[0024] As shown in the drawings, in some embodiments of the present application, the height of the first fixed part 31 is higher than the height of the second fixed part 32, so that the first fixed part 31 and the second fixed part 32 are fixed to the shell and the vibrator assembly 1 respectively, avoiding interference. Figures 1-6 In some embodiments of the present application, the first curved part 331 is connected to the first fixed part 31 through the first transition part 334, the second curved part 332 is connected to the second fixed part 32 through the second transition part 335, and the first curved part 331 and the second curved part 332 are symmetrically arranged. In specific implementation, the first transition part 334 and the second transition part 335 are at least partially arc-shaped. In this way, the connection between the curved part and the fixed part is realized through the transition part, which can effectively increase the elasticity and prolong the service life.

[0025] In some embodiments of the present application, there are two elastic arms 33 on each side of the vibrator assembly 1 along the first direction, the two first curved parts 331 of the two elastic arms 33 are close to each other and connected to the first fixed part 31, and the two second curved parts 332 of the two elastic arms 33 are away from each other and connected to the second fixed part 32. In this way, two elastic arms 33 are arranged on each side, and after adopting this specific arrangement (the two first curved parts 331 are close to each other, and the two second curved parts 332 are away from each other), the elastic arms 33 do not overlap each other, which not only can further increase the elasticity and enhance the vibration effect, but also can ensure that the vibrator assembly 1 is uniformly stressed during vibration and suppresses stray vibration in the non-main direction (Y direction, Z direction).

[0026] In some embodiments of the present application, the second fixed part 32 on each side of the vibrator assembly 1 along the first direction is arranged in pairs and located on both sides of the first fixed part 31 along the third direction (Y direction), and the third direction is perpendicular to the first direction and the second direction. The side of the vibrator assembly 1 connected to the second fixed part 32 is provided with a boss 10, the second fixed part 32 forms an accommodating space 30 therebetween, and the boss 10 is located in the accommodating space 30. In this way, the boss 10 is located in the accommodating space 30, which can realize quick positioning and installation of the elastic support 3 and improve production efficiency.

[0027] In some embodiments of the present application, the vibrator assembly 1 comprises a magnetic circuit assembly, the magnetic circuit assembly comprises a ring-shaped magnetic conducting plate and a permanent magnet, the permanent magnet comprises a first magnet 11 and a second magnet 12, and the first magnet 11 and the second magnet 12 are respectively arranged on opposite sides of the inner surface of the ring-shaped magnetic conducting plate; the stator assembly comprises a coil assembly, the coil assembly comprises a coil 21 and a bracket 22 for fixing the coil 21 to the shell, and the coil 21 is arranged between the first magnet 11 and the second magnet 12. In this way, the ring-shaped magnetic conducting plate wraps the first magnet 11 and the second magnet 12 therein for limiting magnetic leakage, and the use effect is good.

[0028] In some embodiments of the present application, the vibrator assembly 1 comprises a magnetic circuit assembly, the magnetic circuit assembly comprises a ring-shaped magnetic conducting plate and a permanent magnet, the permanent magnet comprises a first magnet 11 and a second magnet 12, and the first magnet 11 and the second magnet 12 are respectively arranged on opposite sides of the inner surface of the ring-shaped magnetic conducting plate; the stator assembly comprises a coil assembly, the coil assembly comprises a coil 21 and a bracket 22 for fixing the coil 21 to the shell, and the coil 21 is arranged between the first magnet 11 and the second magnet 12. In this way, the ring-shaped magnetic conducting plate wraps the first magnet 11 and the second magnet 12 therein for limiting magnetic leakage, and the use effect is good.

[0029] The annular magnetic conductive plate can be of various structural forms, such as an integral design, but in some embodiments of the present application, the annular magnetic conductive plate comprises a first flat magnetic yoke 14 and a second U-shaped magnetic yoke 15 connected by snap fit, the first magnetic body 11 is fixed to the first magnetic yoke 14, and the second magnetic body 12 is fixed to the second magnetic yoke 15. In this way, the first magnetic body 11, the second magnetic body 12, the first magnetic yoke 14 and the second magnetic yoke 15 together form the vibrator assembly 1, facilitating the installation of the first magnetic body 11 and the second magnetic body 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, so that the overall strength and firmness can be maintained. In addition, the first magnetic yoke 14 and the second magnetic yoke 15 can also be connected by clamping, facilitating installation and disassembly.

[0030] In some embodiments of the present application, the inner surface of the housing on both sides in the first direction can be provided with a limiting protrusion 411. In the embodiment shown in the figure, the upper housing 41 is provided with a limiting protrusion 411 on both sides in the first direction, and in specific implementation, the middle part of the two sides of the upper housing 41 can be provided with a recessed groove / convexity to form the limiting protrusion 411, which cooperates with the vibrator assembly 1 to limit the drop and improve the mechanical reliability of the product, and also protects the elastic support 3.

[0031] In some embodiments of the present application, the coil 21 can be attached to the bracket 22, the axis direction of the coil 21 is perpendicular to the vibration direction of the vibrator assembly 1, and the magnetization direction of the first magnetic body 11 and the second magnetic body 12 is parallel to the axis direction of the coil 21. In specific implementation, the coil 21 and the bracket 22 can be integrally bonded, and are welded and fixed with the housing.

[0032] As shown in Figures 1-3 In some embodiments of the present application, the first magnetic body 11 and the second magnetic body 12 can each comprise at least three magnetized parts, the magnetic pole directions of adjacent magnetized parts in the same magnetic body are opposite, the magnetic pole directions of opposite magnetized parts in different magnetic bodies are the same, and the number of coils 21 is at least two. In this way, the multiple magnetized parts and multiple coils not only realize the multi-pole structure and improve the control accuracy, but also improve the uniformity and density of the magnetic field distribution, thereby reducing the hysteresis and eddy current loss.

[0033] As shown in Figures 1-2As shown, in some embodiments of the present application, the shell can include an upper shell 41, a middle shell 42 and a lower shell 43. In actual implementation, the shell can be formed integrally by welding the upper shell 41, the middle shell 42 and the lower shell 43, or can be formed integrally by clamping the upper shell 41, the middle shell 42 and the lower shell 43. In the embodiment shown in the figure, the shell is clamped. In this way, the shell is convenient to assemble and has a stable structure. In the embodiment shown in the figure, the first fixing portion 31 is welded to the upper shell 41, and the limiting protrusion 411 is also arranged on the upper shell 41. Further, 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.

[0034] In some embodiments of the present application, the bracket 22 can include a support plate 221 supporting the coil 21, and the support plate 221 is provided with a bending plate 222 on both sides perpendicular to the vibration direction, and the bending plate 222 is fixedly connected to the middle shell 42 (and can be fixedly connected by welding). In this way, the coil 21 is convenient to install and fix, and has good fixing effect.

[0035] As shown in Figure 1 and Figure 7 In some embodiments of the present application, the middle shell 42 is connected to two opposite side walls of the bracket 22, and the middle part can be outwardly protruding to form a recess 421 inside. The recess 421 is provided with a recessed portion 422 inwardly recessed on both sides along the vibration direction, and the end of the bracket 22 is arranged in the recess 421. In this way, the product volume can be reduced under the condition that the size and specifications of the coil 21 and the bracket 22 are the same.

[0036] In some embodiments of the present application, the vibration exciter can include a FPC 5 (Flexible Printed Circuit) fixed to the outer side wall of the middle shell 42, the FPC 5 including a main body part 51 and bending parts 52 located on both sides of the main body part 51, that is, the FPC 5 is fixed to three adjacent side walls of the middle shell 42, so that the FPC 5 has good fixing firmness and is convenient for connecting external circuits. In specific implementation, the main body part 51 can be provided with a large solder pad (position shown by "+" and "-" symbols in the figure) to be electrically connected with the external circuit, and the end of the bending part 52 can be provided with a small solder pad to be electrically connected with the lead of the coil 21. In order to facilitate the connection of the lead of the coil 21 with the small solder pad, the recess 421 and the recessed part 422 can be provided with a clearance 423. The large solder pad of the FPC 5 is in an integral structure on the side of the middle frame to ensure the relative position accuracy, and only one FPC 5 is needed to realize the electrical connection requirement, thereby reducing the cost, and the small solder pad is on both sides to facilitate the order of the beginning and end of the coil 21, the operation space is large, and the resistance of the FPC 5 is reduced. In the embodiment shown in the figure, the coil 21 and the bracket 22 are bonded as a whole, the bracket 22 is welded with the middle shell 42, the upper shell 41 and the lower shell 43 are welded, and then the FPC 5 is pasted on the middle shell 42 to form a stator assembly. Moreover, the recessed part 422 provides a clear mounting area for the end of the bending part 52 of the FPC 5, avoids the FPC 5 from being offset or warped during assembly or use, so that the FPC 5 has good fixing firmness and is convenient for connecting the lead of the coil 21.

[0037] On the other hand, the embodiments of the present application provide an electronic device including the vibration exciter described above. The structure of the vibration exciter is the same as above, and will not be described here. The electronic device can include a mobile phone, a game console, etc.

[0038] The electronic device of the embodiment of the application comprises a vibration exciter, the elastic support 3 in the vibration exciter comprises a first fixed part 31 connected with the shell, a second fixed part 32 connected with the vibrator assembly 1, and an elastic arm 33 connecting the first fixed part 31 and the second fixed part 32, and the first fixed part 31 and the second fixed part 32 are both located on the same side of the vibrator assembly 1 along the second direction, so that the elastic support 3 is convenient to connect the shell and the vibrator assembly 1; the elastic arm 33 is arranged on both sides of the vibrator assembly 1 along the first direction, the plane where the elastic arm 33 is located is perpendicular to the first direction, the elastic arm 33 is located on both sides of the vibrator assembly 1 and does not contact the vibrator assembly 1 and the shell, which can reduce the noise of the whole vibration exciter, effectively improve the nonlinearity of the product K value, and is beneficial to improving the vibration feeling of the product at low frequency; the elastic arm 33 comprises a first curved part 331 connected with the first fixed part 31, a second curved part 332 connected with the second fixed part 32, and a connecting part 333 connecting the first curved part 331 and the second curved part 332, the distance L1 between the two ends of the first curved part 331 and the second curved part 332 away from the connecting part 333 is less than the distance L2 between the two ends of the first curved part 331 and the second curved part 332 close to the connecting part 333, so that the elastic arm 33 has sufficient extension distance, can disperse the load at the wide end (L2), can concentrate the stress at the narrow end (L1), enhances the vibration effect, and improves the vibration texture; in addition, unlike the traditional double-V-shaped elastic sheet, the integrally formed elastic support 3 can be completed in one step during assembly, saves process cost, and the integrally formed elastic support 3 can ensure high-precision vibration in the main direction, reduce the offset amount in other directions, and provide better experience.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the features defined as "first" and "second" can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0040] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two components. 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.

[0041] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A vibration exciter, characterized in that: The invention comprises a housing, a vibrator assembly and a stator assembly accommodated in the housing, wherein: The vibrator assembly is suspended in the housing through an elastic support member, and one of the vibrator assembly and the stator assembly includes a magnetic circuit assembly, and the other includes a coil assembly; The elastic support member includes a first fixing portion connected to the housing, a second fixing portion connected to the vibrator assembly, and an elastic arm connecting the first fixing portion and the second fixing portion, the vibrator assembly is capable of vibrating along a first direction, the first fixing portion and the second fixing portion are both located on the same side of the vibrator assembly along a second direction, and the first direction and the second direction are perpendicular; The vibrator assembly is provided with elastic arms on both sides along the first direction, the plane where the elastic arms are located is perpendicular to the first direction, the elastic arm includes a first bent portion connected to the first fixed portion, a second bent portion connected to the second fixed portion, and a connecting portion connecting the first bent portion and the second bent portion, and the distance between the two ends of the first bent portion and the second bent portion away from the connecting portion is smaller than the distance between the two ends of the first bent portion and the second bent portion close to the connecting portion.

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

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

4. The vibration exciter according to claim 1, characterized in that The vibrator assembly has two elastic arms on each side along the first direction, the two first bent portions of the two elastic arms are close to each other and connected to the first fixed portion, and the two second bent portions of the two elastic arms are far away from each other and connected to the second fixed portion.

5. The vibration exciter according to claim 4, characterized in that The second fixing parts of the vibrator assembly on each side along the first direction are arranged in pairs and are respectively located on both sides of the first fixing part along the third direction. The third direction is perpendicular to the first direction and the second direction. A boss is provided on one side of the vibrator assembly connected to the second fixing part. 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 vibrator assembly includes the magnetic circuit assembly, the magnetic circuit assembly includes an annular magnetic conductive plate and a permanent magnet, the permanent magnet includes a first magnet and a second magnet, and the first magnet and the second magnet are respectively arranged on opposite sides of the inner surface of the annular magnetic conductive plate; The stator assembly includes the coil assembly, which includes a coil and a bracket for fixing the coil to the housing. The coil is 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, the axial direction of the coil is perpendicular to the vibration direction of the vibrator assembly, and 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 pole directions of adjacent magnetized parts in the same magnet are opposite, and the magnetic pole directions of relative magnetized parts in different magnets are the same, and the number of the coils is at least two.

9. The vibration exciter according to claim 6, characterized in that The annular magnetic conductive plate includes a flat first magnetic yoke and a U-shaped second magnetic yoke that are snap-connected, the first magnet is fixed to the first magnetic yoke, and the second magnet is fixed to the second magnetic yoke; And / or, limiting protrusions are provided on the inner surfaces of both sides of the shell along the first direction.

10. An electronic device, characterized in that: The invention comprises the vibration exciter according to any one of claims 1 to 9.

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