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 the shell, the vibrator subassembly is suspended in the shell, including annular magnetic conductive plate, the inner surface opposite sides of the annular magnetic conductive plate are equipped with first magnet and second magnet;The stator subassembly includes coil and the support of the coil fixed to the shell, the coil is located between the first magnet and second magnet;Along the vibration direction of the vibrator subassembly, the two side walls of the annular magnetic conductive plate and the shell are equipped with elastic support for supporting the vibrator subassembly, and the two side walls of the annular magnetic conductive plate are equipped with avoiding step for avoiding the elastic support.The vibration exciter and electronic equipment of the embodiment of the application are small in noise.

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 that 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, but large vibration feeling products are prone to noise problems after assembly. SUMMARY

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

[0005] To solve the above technical problems, the technical solutions of the present application are as follows:

[0006] 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:

[0007] The vibrator assembly is suspended in the shell and comprises an annular magnetic conductive plate, the inner surface of the annular magnetic conductive plate is provided with a first magnet and a second magnet on opposite sides;

[0008] The stator assembly comprises a coil and a bracket for fixing the coil to the shell, and the coil is arranged between the first magnet and the second magnet;

[0009] Along the vibration direction of the vibrator assembly, elastic supports for supporting the vibrator assembly are arranged between the two side walls of the annular magnetic conductive plate and the shell, and the two side walls of the annular magnetic conductive plate are provided with avoiding steps for avoiding the elastic supports.

[0010] In some embodiments of the present application, the elastic supports are V-shaped elastic pieces, wherein:

[0011] One end of the V-shaped elastic piece is fixed to the annular magnetic conductive plate, and the other end is fixed to the shell;

[0012] And / or, the opening directions of the two V-shaped elastic pieces are opposite.

[0013] In some embodiments of the present invention, the avoidance step includes a first step located in the middle of the side wall of the annular magnetic plate and a second step away from the fixed end of the V-shaped spring piece, wherein the first step is higher than the second step.

[0014] 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.

[0015] In some embodiments of the present invention, the first magnet and the second magnet each include at least three magnets, the magnetic poles of adjacent magnets in the same magnet have opposite directions, the magnetic poles of opposite magnets in different magnets have the same direction, and the number of coils is at least two.

[0016] 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, the first magnet being fixed to the first magnetic yoke and the second magnet being fixed to the second magnetic yoke.

[0017] In some embodiments of the present invention, limiting protrusions are provided on both sides of the first magnetic yoke along the vibration direction of the oscillator assembly.

[0018] In some embodiments of the present invention, the housing includes an upper shell, a middle shell, and a lower shell, and the bracket includes a support plate for supporting the coil. The support plate is provided with bending plates on both sides perpendicular to the vibration direction, and the bending plates are fixedly connected to the middle shell.

[0019] In some embodiments of the present invention, the middle shell connects the two opposite sidewalls of the bracket, the middle portion of which protrudes outward to form an internal groove, and the groove forms an inwardly recessed first recess on both sides along the vibration direction, and the end of the bracket is disposed in the groove.

[0020] In some embodiments of the present invention, a clearance opening is provided at the connection between the groove and the first recess, the bent plate is fitted and fixed to the middle shell, and at least a portion of the bent plate is exposed from the clearance opening.

[0021] In some embodiments of the present invention, the vibration exciter further includes an FPC attached to the outer side of the middle shell. The FPC includes a main body and a bent portion. One end of the bent plate along the vibration direction is provided with a second recess on the side facing the shell. The end of the bent portion is attached to the second recess.

[0022] On the other hand, embodiments of the present invention provide an electronic device including the vibration exciter described above.

[0023] The present invention has the following beneficial effects:

[0024] The vibration exciter and electronic device of this invention 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 disposed 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 and second magnets to limit magnetic leakage, resulting in good performance. Along the vibration direction of the oscillator assembly, elastic support members are provided between the side walls of the annular magnetic guide plate and the housing to support the oscillator assembly. During the research process, the inventors discovered that the elastic support members would contact the side walls of the annular magnetic guide plate during the vibration of the oscillator assembly, generating noise. Therefore, in this invention, avoidance steps are provided on the side walls of the annular magnetic guide plate. By avoiding the steps, the contact between the elastic support members and the annular magnetic guide plate during vibration can be prevented, thereby reducing the noise of the entire vibration exciter. Attached Figure Description

[0025] 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:

[0026] Figure 1 This is an exploded structural diagram of the vibration exciter according to an embodiment of the present invention;

[0027] Figure 2 This is a front sectional view of the vibration exciter according to an embodiment of the present invention;

[0028] Figure 3 This is a top sectional view of the vibration exciter according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the magnetic pole direction of the magnet in an embodiment of the present invention;

[0030] Figure 5 for Figure 1 A three-dimensional structural diagram of the oscillator assembly is shown, with additional illustration of the elastic support components;

[0031] Figure 6 for Figure 5 3D structural diagram of the intermediate elastic support component;

[0032] Figure 7 for Figure 5 A three-dimensional structural diagram of the second magnetic yoke;

[0033] Figure 8 for Figure 1 A schematic diagram showing the connection relationship between the FPC, the shell, and the support.

[0034] Figure label:

[0035] 1. Oscillator assembly; 11. First magnet; 12. Second magnet; 13. Clearance step; 131. First step; 132. Second step; 14. First yoke; 141. Limiting protrusion; 15. Second yoke; 151. Slot.

[0036] 21. Coil; 22. Bracket; 221. Support plate; 222. Bending plate; 2221. Second recess.

[0037] 3. Elastic support component; 31. Clearance groove;

[0038] 41. Upper shell; 411. Recessed groove; 42. Middle shell; 43. Lower shell; 421. Groove; 422. First recessed portion; 423. Clearance opening.

[0039] 5. FPC, 51. Main body, 511. Large solder pad, 52. Bending part, 521. Small solder pad.

[0040] 6. Stop block

[0041] X, direction of vibration; N, north pole of the magnet; S, south pole of the magnet. Detailed Implementation

[0042] 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.

[0043] On the one hand, embodiments of the present invention provide a vibration exciter, such as Figures 1-8 As shown, it includes a housing, an oscillator assembly 1 housed within the housing, and a stator assembly, wherein:

[0044] 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 provided on opposite sides of the inner surface of the annular magnetic guide plate. The stator assembly includes a coil 21 and a bracket 22 for fixing the coil 21 to the housing. The coil 21 is located between the first magnet 11 and the second magnet 12. Along the vibration direction of the oscillator assembly 1, elastic support members 3 for supporting the oscillator assembly 1 are provided between the two side walls of the annular magnetic guide plate and the housing. Avoidance steps 13 for avoiding the elastic support members 3 are provided on the two side walls of the annular magnetic guide plate.

[0045] In use, after the stator assembly coil 21 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 5(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.

[0046] The vibration exciter of this invention 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. Along the vibration direction of the oscillator assembly 1, elastic support members 3 are provided between the side walls of the annular magnetic guide plate and the housing to support the oscillator assembly 1. During the research process, the inventors discovered that during the vibration of the oscillator assembly 1, the elastic support members 3 would contact the side walls of the annular magnetic guide plate, generating noise. Therefore, in this invention, avoidance steps 13 are provided on the side walls of the annular magnetic guide plate. By avoiding the steps 13, the contact between the elastic support members 3 and the annular magnetic guide plate during vibration can be prevented, thereby reducing the noise of the entire vibration exciter.

[0047] like Figures 1-6 As shown, in some embodiments of the present invention, the elastic support 3 is a V-shaped spring sheet. One end of the V-shaped spring sheet is fixed to the annular magnetic plate, and the other end is fixed to the housing, so that the V-shaped spring sheet is more firmly fixed between the annular magnetic plate and the housing. The opening directions of the two V-shaped spring sheets are opposite. Thus, the two V-shaped spring sheets with opposite opening directions are centrally symmetrically arranged with respect to the center of the annular magnetic plate, which enables the annular magnetic plate to be stably suspended in the housing, and the supporting force is more uniform.

[0048] In practice, the V-shaped spring can be formed by multiple bending of sheet metal parts, saving manufacturing costs. The spring has good structural linearity, and the K value changes little with the X-direction displacement, which can ensure high-precision vibration in the main direction and provide a better tactile experience. The V-shaped spring can be fixed (e.g., welded) to the annular magnetic plate and the shell (specifically, the subsequent middle shell 42) by the stop 6 to securely fix the V-shaped spring and at the same time provide fixed constraints for the vibration system (oscillator assembly 1).

[0049] like Figure 3 and Figure 5 Especially Figure 7 As shown, in some embodiments of the present invention, the avoidance step 13 may include a first step 131 located in the middle of the side wall of the annular magnetic plate and a second step 132 away from the fixed end of the V-shaped spring piece, wherein the first step 131 is higher than the second step 132. Figure 7 In the illustrated embodiment, the leftmost end of the shown surface is the fixed end of the V-shaped spring, meaning that the shown surface decreases sequentially from left to right. This two-step design better matches the vibration characteristics of the V-shaped spring, further reducing the noise of the entire vibration exciter.

[0050] In some embodiments of the present invention, 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 implementations, the coil 21 and the bracket 22 can be bonded together, and the bracket 22 is welded and fixed to the housing.

[0051] like Figures 1-2 and Figure 4 As shown, in some embodiments of the present invention, the first magnet 11 and the second magnet 12 may each include at least three magnets, with adjacent magnets in the same magnet having opposite magnetic pole directions, and opposite magnets in different magnets having the same magnetic pole direction. The number of coils 21 is at least two. In this way, multiple magnets and multiple coils can not only realize a multi-pole structure and improve control accuracy, but also improve the uniformity and density of the magnetic field distribution, thereby reducing hysteresis and eddy current losses.

[0052] 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 (and may 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. In this way, the first magnetic yoke 14, the second magnetic yoke 15, the first magnet 11, and the second magnet 12 constitute the oscillator assembly 1, which not only facilitates the installation of the first magnet 11 and the second magnet 12, but also facilitates the processing of the step 13. In a specific implementation, the step 13 can be located on the side wall of the second magnetic yoke 15.

[0053] like Figures 3-7 As shown, in some embodiments of the present invention, limiting protrusions 141 (protrusions) may be provided on both sides of the first magnetic yoke 14 along the vibration direction of the oscillator assembly 1 for drop limiting. The limiting protrusions 141 can prevent the V-shaped spring from being over-compressed and causing permanent deformation, thereby improving the reliability of the product. In a specific implementation, the middle part of the V-shaped spring may be provided with a relief groove 31 for avoiding the limiting protrusions 141. In addition, in order to keep the annular magnetic plate firm, the side wall of the second magnetic yoke 15 may be provided with a slot 151 that cooperates with the limiting protrusions 141.

[0054] like Figures 1-2As 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. Furthermore, one of the upper shell 41 and lower shell 43 may be integrally formed with the middle shell 42.

[0055] like Figure 1 and Figure 8 As shown, in some embodiments of the present invention, the bracket 22 may include a support plate 221 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, this can be achieved by welding). This facilitates the installation and fixing of the coil 21, and the fixing effect is good.

[0056] like Figure 3 As 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 first recesses 422 on both sides along the vibration direction, and the end of the support 22 is located within the groove 421. Thus, while ensuring that the coil 21 and the support 22 are of the same size, the recesses on both sides can reduce the product volume.

[0057] like Figure 8 As shown, in some embodiments of the present invention, a clearance opening 423 may be provided at the connection between the groove 421 and the first recess 422, and the bent plate 222 is fitted and fixed to the middle shell 42, with at least a portion of the bent plate 222 exposed from the clearance opening 423. In this way, the clearance opening 423 can facilitate the connection of the coil 21 lead wire to the FPC 5.

[0058] like Figure 3 and Figure 8As shown, in some embodiments of the present invention, the vibration exciter may further include an FPC 5 (Flexible Printed Circuit) attached to the outside of the middle shell 42. The FPC 5 includes a main body 51 and a bent portion 52. One end of the bent plate 222 of the bracket 22 facing the shell along the vibration direction is provided with a second recess 2221, and the end of the bent portion 52 is attached to the second recess 2221. In specific implementation, a large solder pad 511 may be provided on the main body 51 for electrical connection with external circuits, and a small solder pad 521 may be provided at the end of the bent portion 52 for electrical connection with the leads of the coil 21. The large solder pad 511 is an integral structure on the middle frame side to ensure relative positional accuracy, and the FPC 5 makes full use of space on the middle frame side, which facilitates assembly and welding, reduces the length of the FPC 5, and lowers costs. In the embodiment shown in the figure, the coil 21 is bonded to the bracket 22 as a whole, and after being welded to the middle shell 42, the upper shell 41 and the lower shell 43 are welded, and then the FPC 5 is pasted onto the middle shell 42 to form the stator assembly. In this way, the second recess 2221 provides a clear installation area for the end of the bent portion 52 of the FPC 5, avoiding the FPC 5 from shifting or tilting during assembly or use, so that the FPC 5 is firmly fixed and it is easy to connect the lead wire of the coil 21; at the same time, it prevents the lead wire of the coil 21 from protruding from the outer shell after being fixed to the small pad 521 of the FPC 5 on the bending plate 222, thereby avoiding scratching or squeezing the small pad 521 of the FPC 5 and the lead wire of the coil 21.

[0059] On the other hand, embodiments of the present invention 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 repeated here.

[0060] The electronic device of this invention includes a vibration exciter. The vibration exciter 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. Along the vibration direction of the oscillator assembly 1, elastic support members 3 are provided between the side walls of the annular magnetic guide plate and the housing to support the oscillator assembly 1. During the research process, the inventors discovered that during the vibration of the oscillator assembly 1, the elastic support members 3 would contact the side walls of the annular magnetic guide plate, generating noise. Therefore, in this invention, avoidance steps 13 are provided on the side walls of the annular magnetic guide plate. By avoiding the steps 13, the contact between the elastic support members 3 and the annular magnetic guide plate during vibration can be prevented, thereby reducing the noise of the entire vibration exciter.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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 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; Along the vibration direction of the oscillator assembly, elastic support members for supporting the oscillator assembly are provided between the two side walls of the annular magnetic guide plate and the housing, and the two side walls of the annular magnetic guide plate are provided with avoidance steps to avoid the elastic support members. The housing includes an upper shell, a middle shell, and a lower shell. The bracket includes a support plate that supports the coil. The support plate has bending plates on both sides perpendicular to the vibration direction. The bending plates are fixedly connected to the middle shell. The middle shell connects the two opposite sidewalls of the bracket, with the middle part protruding outward to form an internal groove. The groove forms an inwardly recessed first recess on both sides along the vibration direction, and the end of the bracket is located in the groove. An avoidance opening is provided at the connection between the groove and the first recessed portion, the bent plate is fitted and fixed to the middle shell, and at least a portion of the bent plate is exposed from the avoidance opening; The vibration exciter also includes an FPC attached to the outside of the middle shell. The FPC includes a main body and a bent portion. One end of the bent plate along the vibration direction is provided with a second recess on the side facing the shell. The end of the bent portion is attached to the second recess.

2. The vibration exciter according to claim 1, characterized in that, The elastic support is a V-shaped spring sheet, wherein: One end of the V-shaped spring is fixed to the annular magnetic plate, and the other end is fixed to the housing; And / or, the openings of the two V-shaped springs are in opposite directions.

3. The vibration exciter according to claim 2, characterized in that, The avoidance step includes a first step located in the middle of the side wall of the annular magnetic plate and a second step away from the fixed end of the V-shaped spring piece, wherein the first step is higher than the second step.

4. 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.

5. The vibration exciter according to claim 4, characterized in that, The first magnet and the second magnet each include at least three magnets. The magnetic poles of adjacent magnets in the same magnet are opposite in direction, while the magnetic poles of magnets in different magnets are in the same direction. The number of coils is at least two.

6. The vibration exciter according to any one of claims 1-5, 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.

7. The vibration exciter according to claim 6, characterized in that, Limiting protrusions are provided on both sides of the first magnetic yoke along the vibration direction of the oscillator assembly.

8. An electronic device, characterized in that, Includes the vibration exciter as described in any one of claims 1-7.

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