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, and the vibrator assembly is suspended in the shell and comprises an annular magnetic conductive plate; a first magnet and a second magnet are arranged on two opposite sides of the inner surface of the annular magnetic conductive plate; the stator assembly comprises a coil and a bracket for fixing the coil on the shell, and the coil is arranged between the first magnet and the second magnet; in the vibration direction of the vibrator assembly, elastic supporting pieces used for supporting the vibrator assembly are arranged between the two side walls of the annular magnetic conductive plate and the shell, and avoiding steps used for avoiding the elastic supporting pieces are arranged on the two side walls of the annular magnetic conductive plate. The vibration exciter and the electronic equipment provided by the embodiment of the invention are low in noise.

Description

Technical Field

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

[0002] With the development of electronic technology, portable consumer electronic products are becoming more and more 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 notifications, message notifications, navigation notifications on mobile phones, vibration feedback on game consoles, etc.

[0003] In related technologies, linear vibration motors are the core components that provide tactile experience for consumer electronic products. In order to achieve better usage effects, large vibration motors have become the mainstream trend of product development in recent years. However, large vibration products are prone to noise problems after assembly. Summary of the Invention

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

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: In one aspect, an embodiment of the present invention provides a vibration exciter, comprising a housing, a vibrator assembly housed in the housing, and a stator assembly, wherein: The vibrator assembly is suspended in the housing and includes an annular magnetic conductive plate, and a first magnet and a second magnet are provided on opposite sides of the inner surface of the annular magnetic conductive plate; The stator assembly includes a coil and a bracket for fixing the coil to the housing, wherein the coil is arranged between the first magnet and the second magnet; Along the vibration direction of the vibrator assembly, elastic support members for supporting the vibrator assembly are provided between the two side walls of the annular magnetic conductive plate and the shell, and avoidance steps for avoiding the elastic support members are provided on the two side walls of the annular magnetic conductive plate.

[0006] In some embodiments of the present invention, the elastic support member is a V-shaped spring piece, wherein: One end of the V-shaped spring is fixed to the annular magnetic conductive plate, and the other end is fixed to the housing; And / or, the opening directions of the two V-shaped spring pieces are opposite.

[0007] 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 conductive plate and a second step away from the fixed end of the V-shaped spring sheet, and the first step is higher than the second step.

[0008] 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 vibrator assembly, and the magnetization directions of the first magnet and the second magnet are parallel to the axial direction of the coil.

[0009] 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 are in opposite directions, the magnetic poles of different magnets relative to each other are in the same direction, and the number of the coils is at least two.

[0010] In some embodiments of the present invention, 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.

[0011] 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 vibrator assembly.

[0012] In some embodiments of the present invention, the shell includes an upper shell, a middle shell and a lower shell, the bracket includes a support plate supporting the coil, the support plate is provided with bent plates along both sides perpendicular to the vibration direction, and the bent plates are fixedly connected to the middle shell.

[0013] In some embodiments of the present invention, the middle shell connects the two opposite side walls of the bracket, and the middle part thereof protrudes outward to form a groove located inside, and the groove forms a first concave portion concave inward on both sides along the vibration direction, and the end of the bracket is arranged in the groove.

[0014] In some embodiments of the present invention, a relief 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 relief opening.

[0015] In some embodiments of the present invention, the vibration exciter also includes an FPC attached to the outer side of the middle shell, the FPC includes a main body and a bending portion, and the bending plate has a second recessed portion at one end along the vibration direction facing the side of the shell, and the end of the bending portion is attached to the second recessed portion.

[0016] On the other hand, an embodiment of the present invention provides an electronic device including the above-mentioned vibration exciter.

[0017] The present invention has the following beneficial effects: The vibration exciter and electronic equipment of the embodiments of the present invention are as follows: the vibration exciter includes a shell, a vibrator assembly and a stator assembly accommodated in the shell, the vibrator assembly is suspended in the shell, and includes an annular magnetic conductive plate, and a first magnet and a second magnet are provided on opposite sides of the inner surface of the annular magnetic conductive plate, and a yoke cavity (i.e., the annular magnetic conductive plate) wraps the first magnet and the second magnet therein to limit magnetic leakage, and the use effect is good; along the vibration direction of the vibrator assembly, elastic support members for supporting the vibrator assembly are provided between the two side walls of the annular magnetic conductive plate and the shell. During the research process, the inventor found that during the vibration of the vibrator assembly, the elastic support members will contact with the two side walls of the annular magnetic conductive plate to generate noise. Therefore, in the present invention, avoidance steps are provided on the two side walls of the annular magnetic conductive plate. The avoidance steps can prevent the elastic support members from contacting with the annular magnetic conductive plate to generate noise during the vibration process, thereby reducing the noise of the entire vibration exciter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 An exploded structural diagram of a vibration exciter according to an embodiment of the present invention; Figure 2 A front cross-sectional view of a vibration exciter according to an embodiment of the present invention; Figure 3 is a top sectional view of a vibration exciter according to an embodiment of the present invention; Figure 4 Schematic diagram of the magnetic pole direction of the magnet in an embodiment of the present invention; Figure 5 for Figure 1 A three-dimensional structural diagram of the middle vibrator assembly and an additional elastic support member; Figure 6 for Figure 5 A three-dimensional structural diagram of the elastic support member; Figure 7 for Figure 5 A three-dimensional structural diagram of the second magnetic yoke; Figure 8 for Figure 1 Schematic diagram of the connection between the middle FPC, the middle shell and the bracket.

[0019] Reference numerals: 1. Vibrator assembly, 11. First magnet, 12. Second magnet, 13. Avoidance step, 131. First step, 132. Second step, 14. First magnetic yoke, 141. Limiting protrusion, 15. Second magnetic yoke, 151. Slot, 21. Coil, 22. Bracket, 221. Support plate, 222. Bend plate, 2221. Second recessed portion, 3. Elastic support, 31. Avoidance groove, 41. Upper shell, 411. Recessed groove, 42. Middle shell, 43. Lower shell, 421. Groove, 422. First recessed portion, 423. Avoidance opening, 5. FPC, 51. Main body, 511. Large pad, 52. Bend, 521. Small pad, 6. Stopper, X, vibration direction, N, north pole of the magnet, S, south pole of the magnet. DETAILED DESCRIPTION

[0020] 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.

[0021] On the one hand, an embodiment of the present invention provides a vibration exciter, such as Figure 1-8 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 shell and includes an annular magnetic conductive plate, and a first magnet 11 and a second magnet 12 are provided on opposite sides of the inner surface of the annular magnetic conductive plate; the stator assembly includes a coil 21 and a bracket 22 for fixing the coil 21 to the shell, and the coil 21 is provided between the first magnet 11 and the second magnet 12; along the vibration direction of the vibrator assembly 1, elastic support members 3 for supporting the vibrator assembly 1 are provided between the two side walls of the annular magnetic conductive plate and the shell, and avoidance steps 13 are provided on the two side walls of the annular magnetic conductive plate to avoid the elastic support members 3.

[0022] When in use, 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 vibrator assembly 1, causing the vibrator assembly 1 to move along the X direction (such as Figure 5 As shown); when the driving electrical signal of the coil 21 is an alternating signal, the vibrator assembly 1 is subjected to an alternating force, causing the vibrator assembly 1 to reciprocate along the X direction, generating vibration.

[0023] The vibration exciter of an embodiment of the present invention includes a shell, a vibrator assembly 1 and a stator assembly accommodated in the shell. The vibrator assembly 1 is suspended in the shell and includes an annular magnetic conductive plate. A first magnet 11 and a second magnet 12 are provided on opposite sides of the inner surface of the annular magnetic conductive plate. The yoke cavity (i.e., the annular magnetic conductive plate) wraps the first magnet 11 and the second magnet 12 therein to limit magnetic leakage, and the use effect is good; along the vibration direction of the vibrator assembly 1, elastic support members 3 for supporting the vibrator assembly 1 are provided between the two side walls of the annular magnetic conductive plate and the shell. During the research process, the inventor found that during the vibration of the vibrator assembly 1, the elastic support member 3 will contact with the two side walls of the annular magnetic conductive plate to generate noise. Therefore, in the present invention, avoidance steps 13 are provided on the two side walls of the annular magnetic conductive plate. The avoidance steps 13 can prevent the elastic support member 3 from contacting with the annular magnetic conductive plate to generate noise during the vibration process, thereby reducing the noise of the entire vibration exciter.

[0024] like Figure 1-6 As shown, in some embodiments of the present invention, the elastic support member 3 is a V-shaped spring clip, one end of which is fixed to the annular magnetic plate and the other end is fixed to the housing, so that the V-shaped spring clip is more firmly fixed between the annular magnetic plate and the housing. The openings of the two V-shaped spring clips are in opposite directions. In this way, the two V-shaped spring clips with opposite openings are arranged symmetrically about the center of the annular magnetic plate, which can ensure that the annular magnetic plate is stably suspended in the housing and the supporting force is more uniform.

[0025] In practice, the V-shaped spring can be formed by multiple bending steps of sheet metal, saving manufacturing costs. The spring structure exhibits excellent linearity, with minimal variation in the K value with X-axis displacement, ensuring high-precision vibration in the primary direction and providing a superior tactile experience. The V-shaped spring can be secured (e.g., welded) to the annular magnetic plate and the housing (specifically, the subsequent middle housing 42) via stops 6, thereby firmly securing the V-shaped spring and providing a fixed constraint for the vibration system (vibrator assembly 1).

[0026] 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 conductive plate and a second step 132 away from the fixed end of the V-shaped spring clip, and the first step 131 is higher than the second step 132. Figure 7 In the illustrated embodiment, the leftmost end of the display surface is the fixed end of the V-shaped spring, that is, the display surface gradually decreases from left to right. In this way, the two-step design can better match the vibration characteristics of the V-shaped spring, further reducing the noise of the entire vibration exciter.

[0027] 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 vibrator assembly 1, and the magnetization directions of the first magnet 11 and the second magnet 12 are parallel to the axial direction of the coil 21. In a specific implementation, the coil 21 and the bracket 22 can be bonded together, and the bracket 22 can be welded to the housing.

[0028] like Figure 1-2 and Figure 4 As shown, in some embodiments of the present invention, the first magnet 11 and the second magnet 12 can each include at least three magnets. The magnetic poles of adjacent magnets in the same magnet are in opposite directions, while the magnetic poles of opposite magnets in different magnets are in the same direction. The number of coils 21 is at least two. In this way, multiple magnets and multiple coils not only achieve a multi-pole structure and improve control accuracy, but also enhance the uniformity and density of the magnetic field distribution, thereby reducing hysteresis and eddy current losses.

[0029] The annular magnetic conductive plate can take various structural forms readily conceivable to those skilled in the art, such as an integrated design. However, to facilitate assembly of components (such as magnets), in some embodiments of the present invention, the annular magnetic conductive plate includes a flat first magnetic yoke 14 and a U-shaped second magnetic yoke 15 that are snap-fitted (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. Thus, the first magnetic yoke 14, the second magnetic yoke 15, the first magnet 11, and the second magnet 12 constitute the vibrator assembly 1, which not only facilitates the installation of the first magnet 11 and the second magnet 12, but also facilitates the fabrication of the relief step 13. In specific implementations, the relief step 13 can be located on the sidewall of the second magnetic yoke 15.

[0030] like Figure 3-7 As shown, in some embodiments of the present invention, along the vibration direction of the vibrator assembly 1, two sides of the first magnetic yoke 14 may be provided with stopper protrusions 141 (protrusions) to limit drop. These stopper protrusions 141 prevent the V-shaped spring clip from overcompression and permanent deformation, thereby improving product reliability. In specific implementations, a clearance groove 31 may be provided in the middle of the V-shaped spring clip to avoid the stopper protrusion 141. Furthermore, to ensure the stability of the annular magnetic conductive plate, the sidewalls of the second magnetic yoke 15 may be provided with a retaining groove 151 that mates with the stopper protrusion 141.

[0031] like Figure 1-2 As shown, in some embodiments of the present invention, the housing may include an upper housing 41, a middle housing 42, and a lower housing 43. In specific implementations, the housing may be welded together by welding the upper housing 41, the middle housing 42, and the lower housing 43, or may be snap-fitted together by snap-fitting the upper housing 41, the middle housing 42, and the lower housing 43. In the embodiment shown in the figure, snap-fitting is employed, which facilitates assembly and provides a stable structure. Furthermore, one of the upper housing 41 and the lower housing 43 may be integrally formed with the middle housing 42.

[0032] like Figure 1 and Figure 8 As shown, in some embodiments of the present invention, the bracket 22 may include a support plate 221 that supports the coil 21. The support plate 221 may have bent plates 222 on either side perpendicular to the vibration direction. The bent plates 222 are fixedly connected to the middle shell 42 (specifically, by welding). This facilitates the installation and securement of the coil 21, and provides a more effective securement.

[0033] like Figure 3 As shown, in some embodiments of the present invention, the middle shell 42 connects to two opposing side walls of the bracket 22, and its middle portion can protrude outward to form an internal groove 421. The groove 421 has first indentations 422 formed on both sides along the vibration direction, which are recessed inward. The end of the bracket 22 is disposed within the groove 421. In this way, the first indentation 422 can reduce the product volume while ensuring that the coil 21 and the bracket 22 are of the same size.

[0034] like Figure 8 As shown, in some embodiments of the present invention, a clearance opening 423 may be provided at the junction of the groove 421 and the first recessed portion 422. The bent plate 222 is affixed to the middle shell 42, with at least a portion of the bent plate 222 exposed through the clearance opening 423. In this way, the clearance opening 423 facilitates connection of the leads of the coil 21 to the FPC 5.

[0035] 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. The bent plate 222 of the bracket 22 is provided with a second recessed portion 2221 on one side facing the shell along the vibration direction. The end of the bent portion 52 is attached to the second recessed portion 2221. In a specific implementation, a large solder pad 511 may be provided on the main body 51 to electrically connect to an external circuit, and a small solder pad 521 may be provided on the end of the bent portion 52 to electrically connect to the lead of the coil 21. The large solder pad 511 is an integrated structure on the middle frame side to ensure relative position accuracy. In addition, the FPC 5 fully utilizes the space on the side of the middle frame, which is convenient for assembly and welding, reducing the length of the FPC 5 and reducing costs. In the illustrated embodiment, the coil 21 is bonded to the bracket 22 as a single piece and welded to the middle housing 42. The upper and lower housings 41 and 43 are then welded, and the FPC 5 is affixed to the middle housing 42 to complete the stator assembly. This second recessed portion 2221 provides a clear mounting area for the end of the bent portion 52 of the FPC 5, preventing the FPC 5 from shifting or tilting during assembly or use. This ensures a secure fit for the FPC 5 and facilitates connection to the leads of the coil 21. Furthermore, this prevents the leads of the coil 21 and the small solder pads 521 of the FPC 5 from protruding from the housing after being secured to the bent plate 222, thereby preventing scratches or compression on the small solder pads 521 of the FPC 5 and the leads of the coil 21.

[0036] On the other hand, an embodiment of the present invention provides an electronic device including the above-mentioned vibration exciter. The structure of the vibration exciter is the same as above and will not be described in detail here.

[0037] An electronic device according to an embodiment of the present invention includes a vibration exciter, which includes a shell, a vibrator assembly 1 and a stator assembly accommodated in the shell. The vibrator assembly 1 is suspended in the shell and includes an annular magnetic conductive plate. A first magnet 11 and a second magnet 12 are provided on opposite sides of the inner surface of the annular magnetic conductive plate. The yoke cavity (i.e., the annular magnetic conductive plate) wraps the first magnet 11 and the second magnet 12 therein to limit magnetic leakage, and the use effect is good; along the vibration direction of the vibrator assembly 1, elastic support members 3 for supporting the vibrator assembly 1 are provided between the two side walls of the annular magnetic conductive plate and the shell. During the research process, the inventor found that during the vibration of the vibrator assembly 1, the elastic support member 3 will contact with the two side walls of the annular magnetic conductive plate to generate noise. Therefore, in the present invention, avoidance steps 13 are provided on the two side walls of the annular magnetic conductive plate. The avoidance steps 13 can prevent the elastic support member 3 from contacting with the annular magnetic conductive plate to generate noise during the vibration process, thereby reducing the noise of the entire vibration exciter.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses 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 any one or more embodiments or examples.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention 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 and includes an annular magnetic conductive plate, and a first magnet and a second magnet are provided on opposite sides of the inner surface of the annular magnetic conductive plate; The stator assembly includes a coil and a bracket for fixing the coil to the housing, wherein the coil is arranged between the first magnet and the second magnet; Along the vibration direction of the vibrator assembly, elastic support members for supporting the vibrator assembly are provided between the two side walls of the annular magnetic conductive plate and the shell, and avoidance steps for avoiding the elastic support members are provided on the two side walls of the annular magnetic conductive plate.

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

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 conductive plate and a second step away from the fixed end of the V-shaped elastic sheet, and 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, 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.

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 in opposite directions, and the magnetic poles of magnets relative to each other in different magnets are in the same direction, and the number of the coils is at least two.

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

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 vibrator assembly.

8. The vibration exciter according to any one of claims 1 to 5, characterized in that: The shell includes an upper shell, a middle shell and a lower shell. The bracket includes a support plate supporting the coil. The support plate is provided with bending plates along two sides perpendicular to the vibration direction. The bending plates are fixedly connected to the middle shell.

9. The vibration exciter according to claim 8, characterized in that The middle shell connects two opposite side walls of the bracket, and the middle part thereof protrudes outward to form a groove located inside. The groove forms a first concave portion concave inward on both sides along the vibration direction, and the end of the bracket is arranged in the groove.

10. The vibration exciter according to claim 9, characterized in that A relief opening is provided at the connection between the groove and the first concave 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 relief opening.

11. The vibration exciter according to claim 8, characterized in that The vibration exciter also includes an FPC attached to the outside of the middle shell, the FPC includes a main body and a bending portion, and a second recessed portion is provided on one side of the bending plate along the vibration direction facing the shell, and the end of the bending portion is attached to the second recessed portion.

12. An electronic device, characterized in that: The invention comprises the vibration exciter according to any one of claims 1 to 11.

Images