Exciter and electronic device

Abstract

This invention discloses an exciter and an electronic device. The exciter includes a housing, a stator assembly, a vibration assembly, and an adjustment assembly. The housing has a receiving cavity, and the stator assembly is housed within the receiving cavity. The vibration assembly includes a vibrating element and an elastic element. The vibrating element is suspended within the receiving cavity by the elastic element to vibrate under the drive of the energized stator assembly. The adjustment assembly is disposed within the receiving cavity and is used to clamp or release the elastic element to adjust the deformation length of the elastic element. This invention aims to provide an exciter capable of achieving dual-frequency unidirectional vibration.

Description

Technical Field

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

[0002] With the continuous development of technology, the related technologies of vibration actuators have gradually matured, and the number of consumer electronic products using vibration actuators is increasing, showing a trend of diversification. As a vibration actuator, the ability to realize multiple vibration modes within an effective space, providing a richer user experience, is inevitably the future trend of vibration actuator development. This also places higher demands on the performance and functionality of vibration actuators. However, most existing vibration actuators can only achieve unidirectional, single-frequency vibration, such as low-F0 or high-F0 vibration in the vertical direction, which is insufficient to meet the diverse needs of consumer electronic products. Summary of the Invention

[0003] The main objective of this invention is to provide an exciter and electronic device, specifically an exciter capable of achieving dual-frequency unidirectional vibration. This exciter not only fully utilizes available space in the dual-frequency unidirectional manner but also enables a dual-frequency unidirectional driver with large drive and strong vibration, providing consumers with a richer sensory experience.

[0004] To achieve the above objectives, the present invention proposes an exciter, the exciter comprising:

[0005] A housing having a receiving cavity;

[0006] A stator assembly, the stator assembly being housed within the housing cavity;

[0007] A vibration assembly, comprising a vibrating element and an elastic element, the vibrating element being suspended within the receiving cavity by the elastic element to vibrate under the drive of an energized stator assembly; and

[0008] An adjustment assembly is disposed within the receiving cavity and is used to clamp or release the elastic element to adjust the deformation length of the elastic element.

[0009] In one embodiment, the number of the adjusting components is less than or equal to the number of the elastic elements.

[0010] In one embodiment, the end of the elastic element connected to the housing is a fixed end, and the adjustment component is disposed adjacent to the fixed end.

[0011] In one embodiment, the side of the housing connected to the fixed end is the constraint side, the distance from the adjustment component to the constraint side is defined as d, and the length of the elastic element is defined as L;

[0012] d≤1 / 3L; or, d≤1 / 4L; or, d≤1 / 5L; or, d≤1 / 6L; or, d≤1 / 7L; or, d≤1 / 8L; or, d≤1 / 9L; or, d≤1 / 10L.

[0013] In one embodiment, the adjustment assembly includes two piezoelectric ceramic elements disposed within the receiving cavity. The two piezoelectric ceramic elements are arranged opposite to each other and spaced apart along the vibration direction of the vibrating element to form a deformation gap through which the elastic element passes.

[0014] The actuator has a first state in which the adjustment component is energized to close the deformation gap and a second state in which the adjustment component is not energized to open the deformation gap.

[0015] In the first state, the two piezoelectric ceramic components deform and move closer to each other to clamp the elastic component, so that the elastic component located between the piezoelectric ceramic component and the vibrating component deforms with the vibration of the vibrating component.

[0016] In the second state, the elastic element deforms in the deformation gap as the vibrating element vibrates.

[0017] In one embodiment, the height of the deformation gap in the second state is defined as h; h is greater than or equal to the maximum deformation displacement of the elastic element; or, h is greater than or equal to the maximum vibration displacement of the vibrating element;

[0018] And / or, the piezoelectric ceramic component is cylindrical or square;

[0019] And / or, the exciter further includes a displacement amplification structure, which is disposed within the receiving cavity, and the piezoelectric ceramic component is connected to the displacement amplification structure, which is used to amplify the deformation displacement of the piezoelectric ceramic component.

[0020] In one embodiment, the elastic element includes a plurality of elastic elements, which are spaced apart and evenly distributed along the periphery of the vibrating element, and the plurality of elastic elements are located in the same plane and perpendicular to the vibration direction of the vibrating element;

[0021] The adjustment components include multiple components, and each adjustment component is configured to correspond to one of the elastic elements.

[0022] In one embodiment, the elastic element includes a plurality of first elastic elements and a plurality of second elastic elements, each of the first elastic elements corresponding to a second elastic element, and arranged at intervals along the vibration direction of the vibrating element;

[0023] A plurality of first elastic elements are spaced apart and uniformly arranged along the periphery of the vibrating element, and the plurality of first elastic elements are located in the same plane and perpendicular to the vibration direction of the vibrating element;

[0024] A plurality of second elastic elements are spaced apart and uniformly arranged along the periphery of the vibrating element, and the plurality of second elastic elements are located in the same plane and perpendicular to the vibration direction of the vibrating element.

[0025] In one embodiment, the adjustment components include a plurality of components, at least one of the adjustment components is disposed corresponding to a first elastic element, and at least one of the adjustment components is disposed corresponding to a second elastic element.

[0026] In one embodiment, the elastic element is a spring sheet structure;

[0027] And / or, the stator assembly includes coils;

[0028] And / or, the vibrating element includes a magnet.

[0029] The present invention also proposes an electronic device comprising the exciter described above.

[0030] The exciter of this invention utilizes a housing cavity within its casing to mount, fix, and protect the stator assembly and the vibration assembly. The stator assembly is housed within this cavity, and the vibrating element of the vibration assembly is suspended within it by an elastic element. This allows the vibrating element to vibrate under the drive of the energized stator assembly, causing the elastic element to undergo elastic deformation and ensuring effective vibration. Simultaneously, an adjustment component within the housing cavity clamps or releases the elastic element, adjusting its deformation length. When clamped, the elastic element's deformation length is shortened, resulting in resonance at a high F0 value. When released, the elastic element's deformation length is longer, leading to resonance at a low F0 value. By altering the length of the elastic element through the adjustment component, the exciter's frequency is changed, achieving resonance at both low and high frequencies. This unidirectional vibration at two frequencies effectively utilizes space, improves magnetic field utilization, and features a simple assembly process and low product cost. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the exciter in a second state according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the exciter in a first state according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the exciter structure in another embodiment of the present invention;

[0035] Figure 4 This is a top view of the exciter in another embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the exciter structure in another embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the exciter in a non-operating state according to an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the exciter in a second state according to an embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of the exciter in a first state according to an embodiment of the present invention.

[0040] Explanation of icon numbers:

[0041] label name label name 100 exciter 321 Fixed end 1 case 322 First elastic element 11 Containment cavity 323 Second elastic element 2 stator assembly 4 Adjustment components 3 Vibration Components 41 piezoelectric ceramic components 31 vibrating components 42 Deformation gap 32 elastic element

[0042] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] 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.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0045] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0046] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0047] With the continuous development of technology, the related technologies of vibration actuators have gradually matured, and the number of consumer electronic products using vibration actuators is increasing, showing a trend of diversification. As a vibration actuator, the ability to realize multiple vibration modes within an effective space, providing a richer user experience, is inevitably the future trend of vibration actuator development. This also places higher demands on the performance and functionality of vibration actuators. However, most existing vibration actuators can only achieve unidirectional, single-frequency vibration, such as low-F0 or high-F0 vibration in the vertical direction, which is insufficient to meet the diverse needs of consumer electronic products.

[0048] To address the aforementioned technical problems, this invention proposes an exciter 100, which aims to enable the exciter 100 to achieve vibration at two frequencies in a single direction, thereby making effective use of space, improving magnetic field utilization, and having a simple assembly process and low product cost, thus achieving vibration in more directions to meet the diverse needs of consumer electronics products.

[0049] Understandably, the exciter 100 proposed in this invention can be applied to electronic devices (including consumer electronic products), which may be, but are not limited to, mobile phones, laptops, tablets, personal digital assistants (PDAs), e-book readers, MP3 (Moving Picture Experts Group Audio Layer III) players, MP4 (Moving Picture Experts Group Audio Layer IV) players, wearable devices, navigators, handheld game consoles, etc.

[0050] The specific structure of the exciter 100 proposed in this invention will be described below in a specific embodiment, taking the horizontal placement of the exciter 100 as an example:

[0051] Please refer to the reference. Figures 1 to 8As shown, in this embodiment of the invention, the exciter 100 includes a housing 1, a stator assembly 2, a vibration assembly 3, and an adjustment assembly 4. The housing 1 has a receiving cavity 11, the stator assembly 2 is received in the receiving cavity 11, the vibration assembly 3 includes a vibrating element 31 and an elastic element 32, the vibrating element 31 is suspended in the receiving cavity 11 by the elastic element 32 to vibrate under the drive of the energized stator assembly 2, and the adjustment assembly 4 is disposed in the receiving cavity 11. The adjustment assembly 4 is used to clamp or release the elastic element 32 to adjust the deformation length of the elastic element 32.

[0052] In this embodiment, the housing 1 is used to install, fix, and protect components such as the stator assembly 2, the vibration assembly 3, and the adjustment assembly 4, that is, to provide an installation base for components such as the stator assembly 2, the vibration assembly 3, and the adjustment assembly 4. It can be understood that the housing 1 is generally rectangular, so that its internal receiving cavity 11 has a top wall, a bottom wall, a left side wall, a right side wall, a rear side wall, and a front side wall.

[0053] Understandably, the stator assembly 2 can be a coil or a similar structure. In this embodiment, the coil of the stator assembly 2 is wound with wire and is generally a hollow cylindrical structure, with the two ends of the cylindrical structure being the two ends of the coil. The coil is housed within the housing cavity 11, and its axis extends along the arrangement direction of the left and right walls of the housing cavity 11, i.e., the axis of the coil is horizontal. The left end of the coil is fixed to the left wall of the housing cavity 11, and the right end of the coil faces the right wall of the housing cavity 11. The vibration assembly 3 is housed within the housing cavity 11 and is located between the coil and the right wall of the housing cavity 11. Alternatively, the stator assembly 2 may have two coils, symmetrically arranged on opposite sides of the vibration assembly 3.

[0054] In this embodiment, the vibration assembly 3 includes a vibrating element 31 and an elastic element 32. The vibrating element 31 is suspended within the receiving cavity 11 by the elastic element 32 to vibrate under the drive of the energized stator assembly 2. Optionally, the vibrating element 31 may be a magnet, which is housed within the receiving cavity 11 and located between the two coils. It is understood that the magnetization direction of the magnet may be parallel, perpendicular, or inclined relative to the axis of the coil.

[0055] Understandably, to enable the exciter 100 to vibrate in multiple directions and meet the diverse needs of consumer electronics products, the magnetization direction of the magnet is inclined relative to the coil axis in several specific forms: the magnetization direction is inclined to the upper left; the magnetization direction is inclined to the lower left; the magnetization direction is inclined to the upper right; and the magnetization direction is inclined to the lower right. In other words, the magnetization direction of the magnet is neither parallel to, nor coincident with, nor perpendicular to the coil axis. Or, the magnetization direction of the magnet is also inclined relative to the winding plane of the coil.

[0056] When the coil is energized, the current flows through the magnetic field of the magnet, causing the coil to experience an Ampere force. Since the coil is fixed to the housing 1, and the vibrating element 31, including the magnet, is suspended within the receiving cavity 11, the vibrating element 31, including the magnet, experiences a reaction force from the Ampere force, causing it to vibrate. Because the magnetization direction of the magnet is inclined relative to the axis of the coil, the reaction force of the Ampere force on the magnet is also inclined relative to the axis of the coil, causing the vibration of the vibrating element 31, including the magnet, to occur in a direction inclined relative to the axis of the coil.

[0057] Furthermore, when the input signal in the control coil causes the component of the vibration frequency of the vibrating element 31, including the magnet, in the direction of the coil axis to reach the natural vibration frequency of the elastic element 32 in the direction of the coil axis, the vibrating element 31, including the magnet, will only vibrate in the direction of the coil axis, for example, only vibrate left and right in the horizontal direction. Conversely, when the input signal in the control coil causes the component of the vibration frequency of the vibrating element 31, including the magnet, in the direction perpendicular to the coil axis to reach the natural vibration frequency of the elastic element 32 in the direction perpendicular to the coil axis, the vibrating element 31, including the magnet, will only vibrate in the direction perpendicular to the coil axis, for example, only vibrate up and down in the vertical direction.

[0058] This allows the exciter 100 to vibrate in two mutually perpendicular directions under different signal drives, enabling it to vibrate in more directions to meet the diverse needs of consumer electronics. Furthermore, suspending the vibrating element 31 using a planar elastic element 32 makes the vibration of the vibrating element 31 more stable in different directions, thus providing users with a better tactile experience.

[0059] It should be noted that the housing 1 is mainly formed by the combination of an upper shell and a lower shell. In this embodiment, the upper shell includes a top plate and two side plates located on the left and right sides respectively, and the lower shell includes a bottom plate and two side plates located on the front and rear sides respectively. The top plate and the bottom plate are arranged opposite to each other, and the four side plates are arranged around the top plate and the bottom plate in sequence, thereby forming a receiving cavity 11. It can be understood that the arrangement of the upper shell and the lower shell facilitates the assembly and disassembly of the housing 1, thereby facilitating the assembly of the stator assembly 2, the vibrating element 31, the elastic element 32, etc.

[0060] To further enable the exciter 100 to achieve dual-frequency vibration and fully utilize the available space while achieving dual-frequency unidirectional vibration, thus realizing a dual-frequency unidirectional actuator with large drive and strong vibration, providing consumers with a richer sensory experience, this embodiment adds an adjustment component 4. By using the adjustment component 4 to clamp or release the elastic element 32, the deformation length of the elastic element 32 can be adjusted. When the adjustment component 4 clamps the elastic element 32, the deformation length of the elastic element 32 can be shortened, causing the vibrating element 31 to resonate at a high F0. When the adjustment component 4 releases the elastic element 32, the deformation length of the elastic element 32 is longer, causing the vibrating element 31 to resonate at a low F0. By changing the length of the elastic element 32 using the adjustment component 4, the frequency of the exciter 100 can be changed, achieving resonance at both low and high frequencies. This unidirectional dual-frequency vibration effectively utilizes space, improves magnetic field utilization, and simplifies the assembly process, resulting in low product cost.

[0061] It should be noted that the adjustment component 4 can be a deformable structure, such as a piezoelectric ceramic structure. Of course, it can also be a clamping structure that can clamp or release the elastic element 32, and this is not limited here.

[0062] In one embodiment, the adjustment assembly 4 includes two piezoelectric ceramic elements 41 disposed in the receiving cavity 11. The two piezoelectric ceramic elements 41 are arranged opposite to each other and spaced apart along the vibration direction of the vibrating element 31 to form a deformation gap 42 through which the elastic element 32 passes.

[0063] Understandably, the exciter 100 has a first state in which the adjustment component 4 is energized to close the deformation gap 42 and a second state in which the adjustment component 4 is not energized to open the deformation gap 42; in the first state, the two piezoelectric ceramic elements 41 deform and move closer to each other to clamp the elastic element 32, so that the elastic element 32 located between the piezoelectric ceramic element 41 and the vibrating element 31 deforms with the vibration of the vibrating element 31; in the second state, the elastic element 32 deforms in the deformation gap 42 with the vibration of the vibrating element 31.

[0064] When a direct current is applied to the piezoelectric ceramic component 41, it will exhibit expansion and contraction displacement, and will return to normal after the power is turned off. When the piezoelectric ceramic component 41 is not working, the end of the elastic component 32 away from the vibrating component 31 is fixed to the inner wall of the housing 1, so that the elastic component 32 adjacent to the inner wall of the housing 1 is constrained to the inner wall of the housing 1. At this time, the arm length of the elastic component 32 is relatively large, and the vibrating component 31 resonates at a low F0 (e.g., Figure 7(As shown); After the piezoelectric ceramic component 41 is powered by DC, the piezoelectric ceramic component 41 expands and contracts, causing the two piezoelectric ceramic components 41 to deform and move closer together to clamp the elastic component 32. This causes the elastic component 32, located between the piezoelectric ceramic component 41 and the vibrating component 31, to deform with the vibration of the vibrating component 31. That is, the connecting end of the elastic component 32 is constrained between the two piezoelectric ceramic components 41, thereby reducing the arm length of the elastic component 32. Thus, the vibrating component 31 resonates at a high F0 (e.g., Figure 8 (As shown).

[0065] In this embodiment, the exciter 100 adds an adjustment component 4 composed of a piezoelectric ceramic component 41 to the traditional vibration exciter, so that the traditional vibration exciter can only achieve vibration of a single frequency in a single direction during vibration, and its function is relatively simple, while the exciter 100 of the present invention can achieve vibration of two frequencies in a single direction.

[0066] It should be noted that the inverse piezoelectric effect of the piezoelectric ceramic component 41 is utilized. When energized, the piezoelectric ceramic component 41 deforms or experiences mechanical stress, causing the two piezoelectric ceramic components 41 to deform and move closer together to clamp the elastic component 32. At this time, the connecting end of the elastic component 32 is constrained between the two piezoelectric ceramic components 41, thereby reducing the arm length of the elastic component 32. Thus, the vibrating component 31 resonates at a high F0 position (e.g., ...). Figure 8 (As shown). Therefore, the exciter 100 provides stable excitation output in both the low-to-mid frequency range and the high frequency range, improving the full-frequency sound performance of electronic devices when applied to them. Optionally, when the exciter 100 is operating, the piezoelectric ceramic element 41 receives signals greater than 5kHz to compensate for the high-frequency performance of the exciter 100.

[0067] Therefore, it can be understood that the piezoelectric ceramic component 41 exhibits piston-like motion at low frequencies, but due to its small displacement, its low-frequency output capability is weak. However, at high frequencies, the piezoelectric ceramic component 41 transitions to segmented vibration, at which point a larger excitation output can be achieved. Optionally, the piezoelectric ceramic component 41 is made of piezoelectric ceramic material, including one of PZT, lead metaniobate, PbTiO3, BaTiO3, and BNT.

[0068] In this embodiment, by providing piezoelectric ceramic elements 41 between the two ends of the elastic element 32, the inverse piezoelectric effect of the piezoelectric ceramic elements 41 is utilized. That is, when energized, the piezoelectric ceramic elements 41 can generate deformation or mechanical stress, causing the two piezoelectric ceramic elements 41 to deform and move closer to each other to clamp the elastic element 32. At this time, the connecting end of the elastic element 32 will be constrained between the two piezoelectric ceramic elements 41, thereby reducing the arm length of the elastic element 32. In this way, the vibrating element 31 resonates at a high F0 (e.g., Figure 8(As shown). It is understandable that the piezoelectric ceramic component 41 exhibits piston motion at low frequencies, but due to the small displacement, its low-frequency output capability is weak. However, at high frequencies, the piezoelectric ceramic component 41 transitions to segmented vibration, at which point a larger excitation output can be achieved.

[0069] Traditional exciters are limited in high-frequency performance due to the weight and size of the stator assembly 2. By incorporating a piezoelectric ceramic element 41 in the elastic element 32, the piezoelectric ceramic element 41 receives signals greater than 5kHz during exciter 100 operation, compensating for the high-frequency limitations of the exciter 100. Therefore, the exciter 100 provides stable excitation output in both low-frequency and mid-to-high-frequency ranges, improving the full-frequency sound performance of electronic devices. It is understandable that AC signals can be applied to both the coil and the piezoelectric ceramic element 41, allowing for selective control of the current signal input based on the application scenario of the electronic device.

[0070] Understandably, the center of the piezoelectric ceramic component 41 is concentric with the center of the coil, and the area occupied by the piezoelectric ceramic component 41 is greater than 30% of the area of ​​the elastic component 32 to ensure the stability of the vibration system. That is, the projected area of ​​the piezoelectric ceramic component 41 on the elastic component 32 is greater than 30% of the area of ​​the elastic component 32. Optionally, the piezoelectric ceramic component 41 is a plate-shaped or sheet-shaped structure.

[0071] The exciter 100 of the present invention utilizes a receiving cavity 11 within the housing 1 to mount, fix, and protect the stator assembly 2 and the vibration assembly 3. By housing the stator assembly 2 within the receiving cavity 11 and suspending the vibrating element 31 of the vibration assembly 3 within the receiving cavity 11 via an elastic element 32, the vibrating element 31 can vibrate under the drive of the energized stator assembly 2, thereby causing the elastic element 32 to undergo elastic deformation and ensuring the vibration effect of the vibrating element 31. Simultaneously, an adjustment group is provided within the receiving cavity 11. Component 4, such that the two piezoelectric ceramic components 41 of the adjusting assembly 4 are arranged opposite each other and spaced apart along the vibration direction of the vibrating component 31, to form a deformation gap 42 through which the elastic component 32 passes. Utilizing the inverse piezoelectric effect of the piezoelectric ceramic components 41, that is, when energized, the piezoelectric ceramic components 41 can generate deformation or mechanical stress, thereby causing the two piezoelectric ceramic components 41 to deform and move closer to each other to clamp the elastic component 32 within the deformation gap 42. This shortens the deformation length of the elastic component 32, thereby causing the vibrating component 31 to resonate at a high F0 (e.g., Figure 8 (As shown); When the power is off, the two piezoelectric ceramic components 41 return to normal, that is, when the two piezoelectric ceramic components 41 are not working, the deformation length of the elastic component 32 is relatively long, causing the vibrating component 31 to resonate at a low F0 position (as shown). Figure 7As shown, by using the two piezoelectric ceramic parts 42 of the adjustment component 4 to change the length of the elastic part 32, the frequency of the exciter 100 is changed, achieving resonance at both low and high frequencies. In this way, the space is effectively utilized, the magnetic field utilization rate is improved, and the assembly process is simple and the product cost is low.

[0072] In one embodiment of the exciter 100 of the present invention, coils and magnets are defined as driving components. Two sets of driving components are provided, and the two sets of driving components are mirror-image arranged along the axial direction of the coils. It can be understood that the first set of coils and magnets is mirror-symmetrically arranged with the second set of coils and magnets in the left-right direction. That is, a coil is fixed on each of the left and right walls of the receiving cavity 11, and the axes of the two coils are horizontally arranged and coincidentally aligned. Two or four magnets are arranged between the two coils, for example: a first magnet on the left and a first magnet on the right, respectively. Alternatively, a first magnet on the left, a second magnet on the left, a first magnet on the right, and a second magnet on the right, respectively. The first and second magnets on the left are arranged side-by-side vertically, and the first and second magnets on the right are arranged side-by-side vertically.

[0073] At this time, the left and right sides of the exciter 100 are mirror symmetrical structures, and the vibrating element 31 can simultaneously obtain driving forces from the left and right sides, thereby improving the vibration performance of the vibrating element 31.

[0074] In one embodiment of the exciter 100 of the present invention, the vibrating member 31 further includes a mass block, one side surface of the mass block is disposed facing the end face of the free end of the coil, and a mounting groove is formed on the surface of the mass block facing the end face of the free end of the coil, and the magnet is received in the mounting groove.

[0075] At this time, by configuring a mass block in the vibrating element 31, the mass of the vibrating element 31 can be increased, thereby improving the vibration performance of the vibrating element 31.

[0076] In this embodiment, a mass block is suspended between two coils. A mounting groove is formed on the surface of the mass block facing the left coil, and the left magnet and the right magnet are both housed in the mounting groove. At the same time, a mounting groove is also formed on the surface of the mass block facing the right coil, and the right magnet and the right magnet are both housed in the mounting groove.

[0077] Understandably, the arrangement of housing the magnet in the mounting slot is beneficial to the miniaturization of the vibrating element 31 and the exciter 100.

[0078] In one embodiment, to further achieve unidirectional dual-frequency vibration of the exciter 100, the number of adjustment components 4 is less than or equal to the number of elastic elements 32. It is understood that at least one elastic element 32 corresponds to two piezoelectric ceramic elements 41. Optionally, there may be multiple elastic elements 32, with each multiple elastic element 32 corresponding to a multiple adjustment components 4.

[0079] In order to ensure that the piezoelectric ceramic component 41 of the adjustment component 4 can deform smoothly and tighten the elastic component 32 when energized, in one embodiment, such as Figures 1 to 7 As shown, the end of the elastic element 32 connected to the housing 1 is the fixed end 321, and the adjustment component 4 is arranged adjacent to the fixed end 321.

[0080] Understandably, the side of the housing 1 connected to the fixed end 321 is the constraint side. The distance from the adjusting component 4 to the constraint side is defined as d, and the length of the elastic element 32 is defined as L; d≤1 / 3L; or, d≤1 / 4L; or, d≤1 / 5L; or, d≤1 / 6L; or, d≤1 / 7L; or, d≤1 / 8L; or, d≤1 / 9L; or, d≤1 / 10L. This setting ensures the deformation capability and constraint capability of the piezoelectric ceramic component 41.

[0081] In one embodiment, the height of the deformation gap 42 in the second state is defined as h; h is greater than or equal to the maximum deformation displacement of the elastic element 32; or, h is greater than or equal to the maximum vibration displacement of the vibrating element 31. It can be understood that by limiting the height h of the deformation gap 42 in the second state, it is ensured that the setting of the adjustment component 4 does not affect the deformation of the elastic element 32 with the vibration of the vibrating element 31.

[0082] In one embodiment, the elastic element 32 includes a plurality of elastic elements 32, which are spaced apart and evenly distributed along the periphery of the vibrating element 31, and the plurality of elastic elements 32 are located on the same plane and perpendicular to the vibration direction of the vibrating element 31; the adjustment component 4 includes a plurality of adjustment components 4, each adjustment component 4 being correspondingly provided with an elastic element 32.

[0083] In this embodiment, as Figure 3 and Figure 4 As shown, the arrangement of multiple elastic elements 32 not only provides support between the sidewall of the receiving cavity 11 and the mass block or vibrating element 31, but also buffers and supports the horizontal vibration of the vibrating element 31. This not only improves the stability of the vibrating element 31 during vibration, but also reduces the amount of displacement of the vibrating element 31 during vibration.

[0084] Optionally, the elastic element 32 is a multi-segment bent spring sheet with two ends. The arrangement of the end of the elastic element 32 facing the mass block and inserted into the assembly groove not only improves the connection stability between the first elastic element 32 and the mass block, enhancing the reliability of the elastic element 32, but also helps reduce the distance between the mass block and the coil, facilitating the miniaturization of the exciter 100 and improving the fit between the coil and the magnet, thereby enhancing the vibration performance of the vibrating element 31.

[0085] like Figure 3 As shown, there are two elastic elements 32, which are disposed on opposite sides of the vibrating element 31. There are also two adjusting components 4, which are arranged in a one-to-one correspondence with the two elastic elements 32. Figure 4 As shown, there are four elastic elements 32 and four adjustment components 4, with each adjustment component 4 corresponding to one elastic element 32.

[0086] In another embodiment, such as Figure 5 As shown, the elastic element 32 includes a plurality of first elastic elements 322 and a plurality of second elastic elements 323. Each first elastic element 322 corresponds to a second elastic element 323 and is spaced apart along the vibration direction of the vibrating element 31. The plurality of first elastic elements 322 are spaced apart and uniformly arranged along the periphery of the vibrating element 31, and the plurality of first elastic elements 322 are located in the same plane and are perpendicular to the vibration direction of the vibrating element 31. The plurality of second elastic elements 323 are spaced apart and uniformly arranged along the periphery of the vibrating element 31, and the plurality of second elastic elements 323 are located in the same plane and are perpendicular to the vibration direction of the vibrating element 31.

[0087] Understandably, the surface of the mass block facing the free end of the coil is also provided with a first assembly groove spaced apart from the mounting groove. One end of the first elastic member 322 is inserted into the first assembly groove and connected to the mass block, while the other end extends along the axial direction of the coil toward the cavity wall of the receiving cavity 11 and is connected to the housing 1.

[0088] In this embodiment, the first elastic element 322 is a multi-segment bent spring sheet with two ends. The first elastic element 322 is configured such that its stretching and deformation direction is parallel to the axis of the coil, that is, the first elastic element 322 is supported between the left side wall of the receiving cavity 11 and the mass block, and is used to buffer and support the vibration of the vibrating element 31 in the horizontal direction. In this way, not only can the stability of the vibrating element 31 during vibration be improved, but also the offset of the vibrating element 31 during vibration be reduced.

[0089] Furthermore, the arrangement of the first elastic element 322 having one end facing the mass block inserted into the first assembly groove not only improves the connection stability between the first elastic element 322 and the mass block and enhances the reliability of the first elastic element 322, but also helps to reduce the distance between the mass block and the coil, which is beneficial for miniaturization of the exciter 100 and for the cooperation between the coil and the magnet, thereby improving the vibration performance of the vibrating element 31.

[0090] Furthermore, a second mounting groove is provided on the surface of the mass block facing the free end of the coil, which is spaced apart from the mounting groove. The mounting groove is located between the first mounting groove and the second mounting groove. One end of the second elastic member 323 is inserted into the second mounting groove and connected to the mass block, while the other end extends along the axial direction of the coil toward the cavity wall of the receiving cavity 11 and is connected to the housing 1.

[0091] In this embodiment, the first assembly slot, the mounting slot, and the second assembly slot are arranged sequentially from front to back. Specifically, the first elastic element 322 is positioned in front of the coil, and the second elastic element 323 is positioned behind the coil. Furthermore, the second elastic element 323 is also a multi-segment bent spring sheet with two ends. The second elastic element 323 is also arranged so that its stretching and deformation direction is parallel to the axis of the coil. That is, the second elastic element 323 is supported between the left side wall of the receiving cavity 11 and the mass block, used to buffer and support the horizontal vibration of the vibrating element 31. This not only improves the stability of the vibrating element 31 during vibration but also reduces the amount of displacement during vibration.

[0092] Furthermore, the "one in front and one behind" configuration of the first elastic element 322 and the second elastic element 323 can further improve the stability of the vibrating element 31 during vibration and reduce the offset of the vibrating element 31 during vibration. Alternatively, the "one up and one down" configuration of the first elastic element 322 and the second elastic element 323 can further improve the stability of the vibrating element 31 during vibration and reduce the offset of the vibrating element 31 during vibration.

[0093] That is, the upper first elastic element 322 is supported between the top wall of the receiving cavity 11 and the upper surface of the mass block, and is used to buffer and support the vertical vibration of the vibrating element 31. This not only improves the stability of the vibrating element 31 during vibration, but also reduces the amount of displacement during vibration. The lower second elastic element 323 is supported between the bottom wall of the receiving cavity 11 and the lower surface of the mass block, and is also used to buffer and support the vertical vibration of the vibrating element 31. This not only improves the stability of the vibrating element 31 during vibration, but also reduces the amount of displacement during vibration. Furthermore, the "one above the other" configuration of the two elastic elements 32 ensures that the buffering and support obtained by the vibrating element 31 in the vertical direction is bidirectional, which can further improve the stability of the vibrating element 31 during vibration, thereby further improving the vibration performance of the vibrating element 31.

[0094] Furthermore, the first elastic element 322 and the second elastic element 323 are defined as auxiliary components. The auxiliary components are provided in two sets: one set of the auxiliary components is provided between the surface of the mass block facing the free end face of the coil and the cavity wall of the receiving cavity 11, and another set of the auxiliary components is provided between the surface of the mass block away from the free end face of the coil and the cavity wall of the receiving cavity 11.

[0095] In this embodiment, the first set of first elastic elements 322 and second elastic elements 323 are mirror-symmetrically arranged with the second set of first elastic elements 322 and second elastic elements 323 in the left-right direction. That is, an auxiliary spring is provided before and after the left coil, and an auxiliary spring is provided before and after the right coil. The four springs are respectively supported on the four corners of the mass block. At this time, the vibration element 31 obtains bidirectional buffering and support in the horizontal direction, which can further improve the stability of the vibration element 31 during vibration and further improve the vibration performance of the vibration element 31.

[0096] Furthermore, it should be noted that both elastic elements 32 are planar structures, exhibiting smaller offset in the non-vibration direction compared to other elastic elements; and they experience lower stress during vibration, preventing bending and thus improving the reliability of the exciter 100. Additionally, the planar structure of the main elastic element simplifies manufacturing and assembly, optimizing the cost of the exciter 100 and avoiding resource waste.

[0097] In practical applications, the connection between the elastic element 32 and the cavity wall of the receiving cavity 11 can be achieved by a stop block, and the connection between the elastic element 32 and the mass block can also be achieved by a stop block. Specifically, the connection between the stop block and the cavity wall of the receiving cavity 11 can be achieved by, for example, adhesive bonding, and the connection between the stop block and the mass block can also be achieved by, for example, adhesive bonding.

[0098] In one embodiment, such as Figure 5As shown, the adjustment component 4 includes multiple components, at least one adjustment component 4 is correspondingly disposed with a first elastic element 322, and at least one adjustment component 4 is correspondingly disposed with a second elastic element 323. Optionally, multiple first elastic elements 322 are correspondingly disposed with multiple adjustment components 4 one-to-one, and multiple second elastic elements 323 are correspondingly disposed with multiple adjustment components 4 one-to-one.

[0099] In this embodiment, the piezoelectric ceramic component 41 is cylindrical or square, that is, the surface of the piezoelectric ceramic component 41 that contacts and clamps the elastic component 32 is circular or square, which is not limited here. Optionally, the elastic component 32 is a spring sheet structure.

[0100] Of course, to further increase the deformation displacement of the piezoelectric ceramic component 41 under energized conditions, the exciter 100 also includes a displacement amplification structure. This displacement amplification structure is located within the receiving cavity 11, and the piezoelectric ceramic component 41 is connected to it. The displacement amplification structure amplifies the deformation displacement of the piezoelectric ceramic component 41. Understandably, the displacement amplification structure can refer to existing technical structures, and will not be elaborated upon here. Optionally, the maximum vibration displacement of the vibrating component 31 is 0.4 mm to 1 mm.

[0101] In one embodiment of the exciter 100 of the present invention, the stator assembly 2 further includes a magnetic guide plate, and the end of the coil facing away from the magnet is fixed to the cavity wall of the receiving cavity 11 through the magnetic guide plate.

[0102] In this embodiment, two magnetic plates are configured, one on the left and one on the right. The left magnetic plate is fixed to the left side wall of the receiving cavity 11, and the coil on the left is fixed to the surface of the magnetic plate facing away from the left side wall of the receiving cavity 11. Similarly, the right magnetic plate is fixed to the right side wall of the receiving cavity 11, and the coil on the right is fixed to the surface of the magnetic plate facing away from the right side wall of the receiving cavity 11.

[0103] At this point, it is understandable that by arranging a magnetic plate on the outside of the coil's outward-facing end, the diffusion and leakage of the magnetic field can be reduced, the driving force of the vibrating element 31 can be increased, and the vibration performance of the vibrating element 31 can be improved.

[0104] The present invention also proposes an electronic device including the exciter 100 described above. The specific structure of the exciter 100 is as described in the foregoing embodiments. Since the present electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0105] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An exciter, characterized in that, The exciter includes: A housing having a receiving cavity; A stator assembly, the stator assembly being housed within the housing cavity; A vibration assembly, comprising a vibrating element and an elastic element, the vibrating element being suspended within the receiving cavity by the elastic element to vibrate under the drive of an energized stator assembly; and An adjustment assembly is disposed within the receiving cavity and is used to clamp or release the elastic element to adjust the deformation length of the elastic element. The adjustment assembly includes two piezoelectric ceramic elements disposed within the receiving cavity. The two piezoelectric ceramic elements are arranged opposite to each other and spaced apart along the vibration direction of the vibrating element to form a deformation gap through which the elastic element passes. The actuator has a first state in which the adjustment component is energized to close the deformation gap and a second state in which the adjustment component is not energized to open the deformation gap; In the first state, the two piezoelectric ceramic components deform and move closer to each other to clamp the elastic component, so that the elastic component located between the piezoelectric ceramic component and the vibrating component deforms with the vibration of the vibrating component. In the second state, the elastic element deforms in the deformation gap as the vibrating element vibrates.

2. The exciter according to claim 1, characterized in that, The number of the adjustment components is less than or equal to the number of the elastic elements.

3. The exciter according to claim 1, characterized in that, The end of the elastic element connected to the housing is a fixed end, and the adjustment component is disposed adjacent to the fixed end.

4. The exciter according to claim 3, characterized in that, The side of the housing connected to the fixed end is the constraint side. The distance from the adjustment component to the constraint side is defined as d, and the length of the elastic element is defined as L. d≤1 / 3L; or d≤1 / 4L; or d≤1 / 5L; or d≤1 / 6L; Alternatively, d ≤ 1 / 7 L; or d ≤ 1 / 8 L; or d ≤ 1 / 9 L; or d ≤ 1 / 10 L.

5. The exciter according to claim 1, characterized in that, The height of the deformation gap in the second state is defined as h; h is greater than or equal to the maximum deformation displacement of the elastic element; or h is greater than or equal to the maximum vibration displacement of the vibrating element. And / or, the piezoelectric ceramic component is cylindrical or square; And / or, the exciter further includes a displacement amplification structure, which is disposed within the receiving cavity, and the piezoelectric ceramic component is connected to the displacement amplification structure, which is used to amplify the deformation displacement of the piezoelectric ceramic component.

6. The exciter according to any one of claims 1 to 5, characterized in that, The elastic element includes a plurality of elastic elements, which are spaced apart and evenly distributed along the periphery of the vibrating element, and the plurality of elastic elements are located in the same plane and perpendicular to the vibration direction of the vibrating element. The adjustment components include multiple components, and each adjustment component is correspondingly provided with one of the elastic elements.

7. The exciter according to any one of claims 1 to 5, characterized in that, The elastic element includes a plurality of first elastic elements and a plurality of second elastic elements, each of the first elastic elements corresponding to a second elastic element, and arranged at intervals along the vibration direction of the vibrating element; A plurality of first elastic elements are spaced apart and uniformly arranged along the periphery of the vibrating element, and the plurality of first elastic elements are located in the same plane and perpendicular to the vibration direction of the vibrating element; A plurality of second elastic elements are spaced apart and uniformly arranged along the periphery of the vibrating element, and the plurality of second elastic elements are located in the same plane and perpendicular to the vibration direction of the vibrating element.

8. The exciter according to claim 7, characterized in that, The adjustment components include multiple components, at least one of which is correspondingly disposed with a first elastic element, and at least one of which is correspondingly disposed with a second elastic element.

9. The exciter according to claim 1, characterized in that, The elastic element is a spring sheet structure; And / or, the stator assembly includes coils; And / or, the vibrating element includes a magnet.

10. An electronic device, characterized in that, The electronic device includes an exciter as claimed in any one of claims 1 to 9.

Images