Vibration exciter and electronic device

Abstract

The utility model 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 received in shell, vibrator subassembly is suspended in shell, including annular magnetic conductive plate, annular magnetic conductive plate inner surface opposite side is equipped with first magnet and second magnet;Stator subassembly includes coil and the support of coil fixed in shell, coil is located between first magnet and second magnet;Vibration exciter further includes FPC, FPC includes main part and bending part, main part and bending part are fixed on the outer surface of two adjacent side walls of shell, two first soldering pads are equipped on main part, two second soldering pads are equipped on bending part.The FPC of the vibration exciter and electronic equipment of the utility model embodiment is integrated structure, not only make full use of space, but also assembly welding is convenient, FPC's length can also be reduced, reduce cost.

Description

Technical Field

[0001] This utility model 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 have relatively complex structures, especially the FPC (Flexible Printed Circuit) part, which is particularly inconvenient to assemble. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a vibration exciter and electronic device that is easy to assemble with an FPC.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: On one hand, this utility model embodiment provides a vibration exciter, including a housing, an oscillator assembly and a stator assembly housed within the housing, wherein: The oscillator assembly is suspended inside the housing and includes an annular magnetic guide plate. A first magnet and a second magnet are provided on opposite sides of the inner surface of the annular magnetic guide plate. The stator assembly 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; The vibration exciter also includes an FPC, which includes a main body and a bent portion. The main body and the bent portion are fixed to the outer surfaces of two adjacent side walls of the housing. The main body is provided with two first pads, and the bent portion is provided with two second pads that are electrically connected to the leads of the coil.

[0006] In some embodiments of this invention, the size of the first pad is larger than the size of the second pad.

[0007] In some embodiments of this utility model, the elastic support includes a support body, an elastic arm, and a housing fixing part. The elastic arm is located at both ends of the support body along the vibration direction of the oscillator assembly, and the two ends of the elastic arm are respectively connected to the support body and the housing fixing part. The support body is fixed on the outer surface of the top or bottom wall of the annular magnetic plate. The housing fixing part is located on both sides of the oscillator assembly perpendicular to the vibration direction and is fixed to the housing. The planes of the support body, the elastic arm, and the housing fixing part are all perpendicular to each other.

[0008] In some embodiments of this utility model, the two ends of the elastic arm are smoothly connected to the support body and the housing fixing part, respectively. The elastic arm includes an S-section and a horizontal section. One end of the S-section is connected to the support body, and the other end is connected to one end of the horizontal section. The other end of the horizontal section is connected to the housing fixing part. And / or, the support body, elastic arm and housing fixing part are integrally formed.

[0009] In some embodiments of this utility model, along the vibration direction of the oscillator assembly, the inner surfaces of the housing near the wall of the support body are provided with limiting protrusions at both ends.

[0010] In some embodiments of this utility model, 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.

[0011] In some embodiments of this utility model, the first magnet and the second magnet each include at least six 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 three.

[0012] In some embodiments of this utility model, the annular magnetic plate includes a U-shaped first magnetic yoke and a flat 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. The two sidewalls of the first magnetic yoke are parallel to the vibration direction of the oscillator assembly.

[0013] In some embodiments of this utility model, the housing includes an upper shell, a middle shell, and a lower shell, and the bracket is provided with legs at the four corners, and the bracket is fixed to the middle shell by the legs.

[0014] In some embodiments of this utility model, the middle shell connects the two opposite sidewalls of the bracket, with the middle portion protruding outward to form an internal groove, and the groove forming inward recessed portions on both sides along the vibration direction.

[0015] In some embodiments of this utility model, a clearance opening is provided at the connection between the groove and the recessed portion.

[0016] On the other hand, this utility model embodiment provides an electronic device including the above-described vibration exciter.

[0017] This utility model has the following beneficial effects: The vibration exciter and electronic device of this utility model include a housing, an oscillator assembly and a stator assembly housed within the housing. The oscillator assembly is suspended within the housing and includes an annular magnetic guide plate. A first magnet and a second magnet are provided on opposite sides of the inner surface of the annular magnetic guide plate. A magnetic yoke cavity (i.e., the annular magnetic guide plate) encloses the first magnet and the second magnet to limit magnetic leakage, resulting in good performance. The vibration exciter includes an FPC, which includes a main body and a bent portion. The main body and the bent portion are fixed to the outer surfaces of two adjacent side walls of the housing. The main body has two first pads, and the bent portion has two second pads that are electrically connected to the leads of the coil. Thus, the two large pads (i.e., the first pads) of the FPC are on the outer surface of the side walls of the housing and are an integral structure, which not only ensures the relative positional accuracy but also ensures the firm fixation of the FPC. Moreover, only one FPC is needed to meet the electrical connection requirements, reducing costs. The two small pads (i.e., the second pads) of the FPC are also on the outer surface of the side walls of the housing, which not only makes full use of space but also facilitates assembly and welding and reduces the length of the FPC, further reducing costs. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an exploded structural diagram of the vibration exciter according to an embodiment of the present invention; Figure 2 This is a front sectional view of the vibration exciter according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the magnetic pole direction of the magnet in an embodiment of this utility model; Figure 4 for Figure 1 A three-dimensional structural diagram of the oscillator assembly is shown, with additional illustrations of the elastic support components. Figure 5 for Figure 4 3D structural diagram of the medium elastic support component; Figure 6 for Figure 1 Schematic diagram showing the connection relationship between the central oscillator assembly, the stator assembly, and the upper shell; Figure 7 for Figure 1 A schematic diagram showing the connection between the FPC and the housing.

[0019] Figure label: 1. Oscillator assembly; 11. First magnet; 12. Second magnet; 14. First yoke; 141. Sidewall; 15. Second yoke. 21. Coil; 22. Bracket; 221. Support leg. 3. Elastic support component; 31. Support body; 32. Elastic arm; 321. S-section; 322. Horizontal section; 33. Housing fixing part. 41. Upper shell; 411. Limiting protrusion; 42. Middle shell; 43. Lower shell; 421. Groove; 422. Recessed portion; 423. Clearance opening. 5. FPC, 51. Main body, 511. Large solder pad, 52. Bending section. 6. Stop block X, direction of vibration; N, north pole of the magnet; S, south pole of the magnet. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] On the one hand, embodiments of this utility model provide a vibration exciter, such as Figure 1-7 As shown, it includes a housing, an oscillator assembly 1 housed within the housing, a stator assembly, and an elastic support member 3 for supporting the oscillator assembly 1, wherein: The oscillator assembly 1 is suspended inside the housing and includes an annular magnetic guide plate. A first magnet 11 and a second magnet 12 are disposed on opposite sides of the inner surface of the annular magnetic guide plate. The stator assembly includes a coil 21 and a bracket 22 that fixes the coil 21 to the housing. The coil 21 is positioned between the first magnet 11 and the second magnet 12. The vibration exciter also includes an FPC 5, which includes a main body 51 and a bent portion 52. The main body 51 and the bent portion 52 are fixed to the outer surfaces of two adjacent sidewalls of the housing. The main body 51 has two first pads 511, and the bent portion 52 has two second pads (not shown) electrically connected to the leads of the coil. Furthermore, the size of the first pads 511 can be larger than the size of the second pads to facilitate electrical connection operations between the corresponding components.

[0022] In use, the two large pads (i.e., the first pads 511) on the main body 51 of the FPC 5 are electrically connected to the external circuit, and the two small pads (i.e., the second pads) on the bent part 52 are electrically connected to the leads at both ends of the coil 21. After the coil 21 of the stator assembly is energized, it interacts with the magnetic field generated by the first magnet 11 and the second magnet 12 of the oscillator assembly 1, causing the oscillator assembly 1 to move along the X direction under the support of the elastic support member 3 (e.g., ...). Figure 4(As shown); when the driving signal of coil 21 is an alternating signal, the oscillator assembly 1 is subjected to an alternating force, causing the oscillator assembly 1 to reciprocate along the X direction and generate vibration.

[0023] The vibration exciter of this utility model embodiment includes a housing, an oscillator assembly 1 housed within the housing, and a stator assembly. The oscillator assembly 1 is suspended within the housing and includes an annular magnetic guide plate. A first magnet 11 and a second magnet 12 are provided on opposite sides of the inner surface of the annular magnetic guide plate. A magnetic yoke cavity (i.e., the annular magnetic guide plate) encloses the first magnet 11 and the second magnet 12 to limit magnetic leakage, resulting in good performance. The vibration exciter includes an FPC 5, which includes a main body 51 and a bent portion 52. The main body 51 and the bent portion 52 are fixed to the outer surfaces of two adjacent sidewalls of the housing. The main body 51 has two first pads 511, and the bent portion 52 has two second pads electrically connected to the leads of the coil 21. Thus, the two large pads (i.e., the first pads 511) of the FPC 5 are integrally formed on the outer surface of the sidewalls of the housing, ensuring not only relative positional accuracy but also a secure fixation of the FPC 5. Furthermore, only one FPC is needed to meet the electrical connection requirements, reducing costs. The two small pads (i.e. the second pads) of the 5 are also on the outer surface of the side wall of the housing, which not only makes full use of the space, but also facilitates assembly and welding, and can reduce the length of the FPC and reduce costs.

[0024] like Figure 4-5 As shown, in some embodiments of this utility model, the elastic support 3 may include a support body 31, an elastic arm 32, and a housing fixing part 33. The elastic arm 32 is located at both ends of the support body 31 along the vibration direction of the oscillator assembly 1, and the two ends of the elastic arm 32 are respectively connected to the support body 31 and the housing fixing part 33. The support body 31 is fixed on the outer surface of the top or bottom wall of the annular magnetic plate, and the housing fixing part 33 is located on both sides of the oscillator assembly 1 perpendicular to the vibration direction and fixed to the housing (specifically, the inner surface of the middle shell 42). The planes in which the support body 31, the elastic arm 32, and the housing fixing part 33 are located are all perpendicular to each other.

[0025] In this way, the elastic arm 32 is located at both ends of the vibration direction of the oscillator assembly 1. The two ends of the elastic arm 32 are connected to the support body 31 and the housing fixing part 33 respectively. While fixing the elastic support 3, it can also retain the elasticity of the elastic support 3, effectively reducing the Y-direction displacement component of the oscillator assembly 1 during vibration and improving the reliability of the product. The planes of the support body 31, the elastic arm 32 and the housing fixing part 33 are all perpendicular to each other. This structure can strengthen the elasticity while being firmly fixed, and has a good performance.

[0026] Furthermore, the two ends of the elastic arm 32 can be smoothly connected to the support body 31 and the housing fixing part 33, respectively. The elastic arm 32 includes an S-segment 321 and a horizontal segment 322. One end of the S-segment 321 is connected to the support body 31, and the other end is connected to one end of the horizontal segment 322. The other end of the horizontal segment 322 is connected to the housing fixing part 33. In this way, the elastic effect of the elastic arm 32 is better. The number of elastic arms 32 at each end of the support body 31 along the vibration direction of the oscillator assembly 1 can be one or more. In the embodiment shown in the figure, there are two elastic arms 32 at each end of the support body 31, and correspondingly, there are two housing fixing parts 33 at each end of the support body 31.

[0027] The support body 31, elastic arm 32, and housing fixing part 33 can be integrally formed. In specific implementation, the elastic support 3 can be formed by multiple bending of sheet metal parts. Unlike the traditional double V-shaped spring sheet, the integrally formed elastic support 3 can be completed in one step during assembly, saving process costs. Moreover, 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 user experience.

[0028] like Figure 1-2 As shown, in some embodiments of this utility model, along the vibration direction of the oscillator assembly 1, the inner surface of the housing near the support body 31 has limiting protrusions 411 at both ends. The wall of the housing near the support body 31 is the top wall or bottom wall of the housing. In the embodiment shown in the figure, it is the top wall, that is, the upper shell 41 has limiting protrusions 411 at both ends. In specific implementation, the two sides of the upper shell 41 can be provided with recessed grooves / convex bulges to form limiting protrusions 411. The limiting protrusions 411 cooperate with the oscillator assembly 1 to limit the drop, improve the mechanical reliability of the product, and at the same time protect the elastic support 3.

[0029] In some embodiments of this utility model, the coil 21 is attached to the bracket 22, the axial direction of the coil 21 is perpendicular to the vibration direction of the oscillator assembly 1, and the magnetization direction of the first magnet 11 and the second magnet 12 is parallel to the axial direction of the coil 21. In specific implementation, the coil 21 and the bracket 22 can be bonded together, and the bracket 22 is welded and fixed to the shell.

[0030] like Figure 1-3 As shown, in some embodiments of this utility model, the first magnet 11 and the second magnet 12 may each include at least six magnetized portions. The magnetic pole directions of adjacent magnetized portions within the same magnet are opposite, while the magnetic pole directions of opposite magnetized portions within different magnets are the same. (It should be noted that...) Figure 3In this example, only the magnetic pole direction of the outer surface of a single magnet is shown; due to space limitations, the magnetic pole direction of the inner surface is not shown. There are at least three coils 21, each corresponding to four magnetization sections (two in the first magnet 11 and two in the second magnet 12). Thus, multiple magnets and multiple coils not only achieve a multi-pole structure, improving control precision, but also enhance the uniformity and density of the magnetic field distribution, thereby reducing hysteresis and eddy current losses. Furthermore, the three-coil structure, compared to traditional single-coil or double-coil structures, reduces coil height while maintaining the Ampere force, increasing the product's Z-axis space margin and fully utilizing the vibration space.

[0031] 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 this invention, the annular magnetic guide plate includes a U-shaped first magnetic yoke 14 and a flat second magnetic yoke 15 that are snap-fitted together (and can be further welded). The first magnet 11 is fixed to the first magnetic yoke 14, and the second magnet 12 is fixed to the second magnetic yoke 15. Thus, the first magnetic yoke 14, the second magnetic yoke 15, the first magnet 11, and the second magnet 12 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 first magnetic yoke 14 and the second magnetic yoke 15 are connected by a snap-fit ​​structure. Alternatively, the first magnetic yoke 14 and the second magnetic yoke 15 can also be connected by welding. Furthermore, the two sidewalls 141 of the first magnetic yoke 14 are parallel to the vibration direction of the oscillator assembly 1, thus providing sufficient lateral space for the installation of the three coils.

[0032] like Figure 1-2 and Figure 7 As shown, in some embodiments of this utility model, 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 them together. The embodiment shown in the figure uses snap-fitting, which facilitates assembly and ensures a stable structure. Furthermore, one of the upper shell 41 and lower shell 43 can be integrally formed with the middle shell 42 to reduce the number of parts.

[0033] In some embodiments of this utility model, the four corners of the bracket 22 may be provided with support legs 221, and the bracket 22 is fixed to the middle shell 42 by the support legs 221 (specifically, it can be achieved by welding). In this way, it is convenient to install and fix the coil 21, and the fixing effect is good.

[0034] In some embodiments of this utility model, the middle shell 42 connects to 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. This allows for a reduction in product volume by ensuring that the coil 21 and the support 22 are of the same size. An allowance opening 423 can be provided at the connection between the groove 421 and the recessed portion 422, facilitating the passage of the coil 21's leads to connect to the FPC 5.

[0035] On the other hand, this embodiment of the invention provides 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.

[0036] The electronic device of this utility model embodiment includes a vibration exciter. The vibration exciter includes a housing, a transducer assembly 1 housed within the housing, and a stator assembly. The transducer assembly 1 is suspended within the housing and includes an annular magnetic guide plate. A first magnet 11 and a second magnet 12 are provided on opposite sides of the inner surface of the annular magnetic guide plate. A magnetic yoke cavity (i.e., the annular magnetic guide plate) encloses the first magnet 11 and the second magnet 12 to limit magnetic leakage, resulting in good performance. The vibration exciter also includes an FPC 5, which includes a main body 51 and a bent portion 52. The main body 51 and the bent portion 52 are fixed to the outer surfaces of two adjacent sidewalls of the housing. The main body 51 has two first pads 511, and the bent portion 52 has two second pads electrically connected to the leads of the coil 21. Thus, the two large pads (i.e., the first pads 511) of the FPC 5 are integrally formed on the outer surface of the sidewalls of the housing, ensuring not only relative positional accuracy but also secure fixation of the FPC 5. Furthermore, only one FPC is needed to meet electrical connection requirements, reducing costs. The two small pads (i.e. the second pads) of the 5 are also on the outer surface of the side wall of the housing, which not only makes full use of the space, but also facilitates assembly and welding, and can reduce the length of the FPC and reduce costs.

[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0039] 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 present 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.

[0040] Although embodiments of the present 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 present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vibration exciter, characterized in that, It includes a housing, an oscillator assembly and a stator assembly housed within the housing, and an elastic support for supporting the oscillator assembly, wherein: The oscillator assembly is suspended inside the housing and includes an annular magnetic guide plate. A first magnet and a second magnet are provided on opposite sides of the inner surface of the annular magnetic guide plate. The stator assembly 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; The vibration exciter also includes an FPC, which includes a main body and a bent portion. The main body and the bent portion are fixed to the outer surfaces of two adjacent side walls of the housing. The main body is provided with two first pads, and the bent portion is provided with two second pads that are electrically connected to the leads of the coil.

2. The vibration exciter according to claim 1, characterized in that, The size of the first pad is larger than the size of the second pad.

3. The vibration exciter according to claim 1, characterized in that, The elastic support includes a support body, elastic arms, and a housing fixing part. The elastic arms are located at both ends of the support body along the vibration direction of the oscillator assembly, and the two ends of the elastic arms are respectively connected to the support body and the housing fixing part. The support body is fixed on the outer surface of the top or bottom wall of the annular magnetic plate. The housing fixing part is located on both sides of the oscillator assembly perpendicular to the vibration direction and is fixed to the housing. The planes of the support body, the elastic arm, and the housing fixing part are all perpendicular to each other.

4. The vibration exciter according to claim 3, characterized in that, The two ends of the elastic arm are smoothly connected to the support body and the housing fixing part, respectively. The elastic arm includes an S-section and a horizontal section. One end of the S-section is connected to the support body, and the other end is connected to one end of the horizontal section. The other end of the horizontal section is connected to the housing fixing part. And / or, the support body, elastic arm and housing fixing part are integrally formed.

5. The vibration exciter according to claim 3, characterized in that, Along the vibration direction of the oscillator assembly, the inner surface of the housing near the wall of the support body is provided with limiting protrusions at both ends.

6. The vibration exciter according to claim 1, 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.

7. The vibration exciter according to claim 6, characterized in that, The first magnet and the second magnet each include at least six 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 three.

8. The vibration exciter according to claim 7, characterized in that, The annular magnetic guide plate includes a U-shaped first magnetic yoke and a flat 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. The two sidewalls of the first magnetic yoke are parallel to the vibration direction of the oscillator assembly.

9. The vibration exciter according to claim 1, characterized in that, The housing includes an upper shell, a middle shell, and a lower shell. The support has legs at its four corners, and the support is fixed to the middle shell by the legs.

10. The vibration exciter according to claim 9, characterized in that, The middle shell connects the two opposite sidewalls of the support, with the middle portion protruding outward to form an internal groove, and the groove forming inward recesses on both sides along the vibration direction.

11. The vibration exciter according to claim 10, characterized in that, An avoidance opening is provided at the connection between the groove and the recessed portion.

12. An electronic device, characterized in that, Includes the vibration exciter according to any one of claims 1-11.

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