Double-mover actuator of lever-type elastic sheet and application of double-mover actuator

Abstract

The invention relates to the technical field of actuators, in particular to a double-rotor actuator of a lever-type elastic piece and application of the double-rotor actuator of the lever-type elastic piece, and the double-rotor actuator comprises the elastic piece, a peripheral supporting structure, a first rotor assembly and a second rotor assembly; the elastic piece comprises a central part, a peripheral part and a connecting supporting rod, the peripheral part of the elastic piece is fixedly connected with the peripheral supporting structure, the connecting supporting rod comprises an end point stress point A, a middle stress point B and an end point stress point O, the end point stress point A is located at the central part of the elastic piece, the middle stress point B is located at the peripheral part of the elastic piece, and the end point stress point O is located at the peripheral part of the elastic piece. The rotor assembly II is connected with a middle stress point B; the double-rotor structure generates two or more harmonic peaks; electromagnetic interaction force which is equal in magnitude and opposite in direction is generated between the first mover assembly and the second mover assembly, through the lever type stress relation, the central portion of the position A of an end point stress point or the peripheral portion of the position O of the end point stress point is pried up to output acting force outwards, and the mechanical relation forms the lever type stress relation. Therefore, the acting force of the central part of the end point stress point A or the peripheral part of the end point stress point O is increased, so that the actuating performance of the actuator is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bone conduction vibrators, and more specifically to a dual-movement actuator with a lever-type spring and its application. Background Art

[0002] Bone conduction earphone vibrators are a special type of vibrator used to transmit sound through bones instead of transmitting sound through the air. It uses bone conduction technology to transmit sound vibrations directly to the auditory system.

[0003] The application of bone conduction technology can be traced back to the 18th century, when Italian scientists first discovered the bone conduction phenomenon; in the early 20th century, bone conduction technology was used in hearing aids to help people with hearing loss; in the mid-to-late 20th century, with the development of electronic technology, bone conduction headphones began to enter the consumer market; today, as technology continues to mature, bone conduction headphones have been widely used in our daily lives.

[0004] Bone conduction headphones use vibrators in the headphones to convert electrical signals into mechanical vibrations. The vibrations are transmitted to the user's skull through the headphone contact points and then to the inner ear, bypassing the outer ear and middle ear. The inner ear converts the mechanical vibrations into nerve signals and transmits them to the brain, enabling the user to hear sounds.

[0005] In addition, bone conduction headphones do not seal the ear canal. Since sound is transmitted through the bones, the ear canal remains open, allowing users to hear ambient sounds at the same time. This makes them suitable for outdoor activities or when you need to pay attention to your surroundings. Wearing them for a long time does not cause discomfort or pressure in the ear canal, and can also provide a better listening experience for people with certain hearing impairments (such as damage to the middle or outer ear).

[0006] The design and application of bone conduction headphone vibrators combine the technologies of acoustics, materials science and ergonomics to provide a unique way of sound transmission that is suitable for a variety of application scenarios.

[0007] A dual-resonance oscillator is an oscillator with two primary resonant frequencies. When a system is driven by an external force at its natural frequency, it produces a vibration with maximum amplitude. This phenomenon is called resonance; resonance is a manifestation of resonance, meaning that a system produces maximum vibration response at one or more frequencies.

[0008] Traditional vibrators typically have a primary resonant frequency at which their response reaches its maximum. Dual-resonant vibrators, on the other hand, have two primary resonant frequencies, both of which reach significant values. These two frequencies are typically precisely controlled by design to meet specific application requirements.

[0009] Dual-resonance peak oscillators generally have the following advantages: dual-resonance peak oscillators can provide effective vibration response in a wider frequency range and are suitable for applications requiring multi-band response; different functions can be achieved at different frequencies, such as simultaneously processing high-frequency and low-frequency signals in audio equipment; by adjusting the structure and materials, the resonant frequency can be customized to meet specific needs; by adjusting the circuit components, the frequency can be easily adjusted to meet different needs.

[0010] In high-quality headphones and speakers, dual-resonance peak oscillators can provide richer sound quality and cover a wider frequency range; in sensors, they can be used to measure vibrations and sound waves in different frequency ranges and are widely used in industrial monitoring and scientific research; they can also be used to study the dynamic properties of composite materials and optimize structural design, as well as in certain hearing devices and diagnostic instruments, where dual-resonance peak oscillators can provide more accurate frequency response.

[0011] In the field of bone conduction audio devices and tactile feedback devices, existing bone conduction vibrator technology mostly uses a single-frequency vibration scheme. Although this solution has certain effects in specific low-frequency or high-frequency applications, it still has significant limitations in practical applications. For example, when using bone conduction headphones, traditional single-frequency vibrators often have difficulty achieving ideal frequency response at different frequencies, which can easily lead to unclear or distorted sound signal transmission. In addition, single-frequency vibrators are generally difficult to meet the requirements of audio equipment for clear transmission of multiple frequency bands. In particular, in scenarios where high and low frequencies need to be presented simultaneously, single-frequency vibrators cannot provide rich audio details, affecting the user experience.

[0012] In the application of tactile feedback devices, such as game controllers, smart cockpits, and virtual reality devices, traditional single-frequency vibrators face similar problems. Single-frequency vibration can only provide limited vibration feedback, making it difficult to give users a more realistic and delicate tactile experience. Especially in scenarios where multi-band feedback is required, such as simulating road vibrations or collision feedback in simulators, the performance of single-frequency vibrators is relatively weak and lacks a sense of layering. Tactile feedback devices can provide more realistic feedback effects at different frequencies and forces. However, existing devices cannot meet the requirements of fine feedback due to the lack of multi-band response capabilities.

[0013] At present, no patents related to dual-resonance peak oscillators have been retrieved, which shows that there is a lot of room for development in this area.

[0014] CN219499530U discloses a bone conduction vibrator. The bone conduction vibrator provided by the above-mentioned utility model patent includes a shell, a magnet is fixedly installed at the center position inside the shell, the inner wall of the shell is fixed with radiation-proof glass by an embedded manner, and the outer surface of the shell is coated with a layer of black radiation-proof paint. A gasket is installed above the magnet, a circuit board is fixed above the gasket by screws, a coil holder is fixed above the circuit board, the coil holder is fixed to the inner wall of the shell, a coil is fixed inside the coil holder, a fan-shaped plastic pad is fixed above the coil holder, a vibration plate is fixed inside the fan-shaped plastic pad, a top cover is fixed above the fan-shaped plastic pad, a wiring terminal is fixed above the top cover, and the top cover is tightly engaged with the shell. As a preferred technical solution of the utility model, the vibration plate has a frequency response range of 100-10kHz, involving bass, midrange, and treble, and an F0 resonance frequency of 160Hz.

[0015] CN214177558U discloses a bone conduction vibrator speaker and bone conduction vibrator. The bone conduction vibrator provided by this utility model patent includes a U-shaped iron, a magnetic circuit portion, and a bracket. The bracket is fixed to the U-shaped iron. The bracket has a functional step at the center, and a boss is provided on the functional step. The boss is fixed to the sound vibration plate and compressed by an inclined connecting member. The inclined connecting member includes an adapter and a fixing portion. The fixing portion is mounted on the boss to fix the sound vibration plate. The adapter portion is connected to a bone-touch vibration cover. The cover surface of the bone-touch vibration cover has the same inclination angle relative to its bottom plane. The bone conduction vibrator speaker of this utility model, based on a novel bracket and vibration component structure, achieves more complete audio energy transmission, better sound quality, and a better user experience.

[0016] The problems with existing solutions are as follows:

[0017] Natural frequency limitation: Single-harmonic peak oscillators mainly operate at a specific natural frequency, which limits their applicability in multi-band applications. When multiple frequency ranges need to be covered, single-harmonic peak oscillators often cannot meet the requirements.

[0018] Frequency tuning difficulty. Although the resonant frequency can be changed by adjusting the mass and spring stiffness, this tuning process is complex and difficult to control precisely, especially in dynamic applications.

[0019] To address these issues, researchers have begun exploring the design of dual-resonance peak oscillators in recent years to achieve multi-band resonant responses. The structural design of dual-resonance peak oscillators can usually produce significant resonance effects in both low-frequency and high-frequency bands, thereby improving the transmission efficiency of vibration and the restoration of audio. However, most current dual-resonance peak oscillator technologies are still in the experimental stage and are difficult to apply to large-scale audio equipment and tactile feedback devices. On the one hand, existing dual-resonance peak technologies require complex structural design and precise material processing, which is costly; on the other hand, many designs have difficulty in effectively controlling the vibration direction and frequency stability, resulting in poor practical application results. Summary of the Invention

[0020] The present invention is precisely aimed at the above-mentioned technical problems. The purpose of the present invention is to provide a dual-actuator actuator with a lever-type spring and its application. Through a unique scissor-type or lever-type force relationship and a closed magnetic circuit design, a resonant response in both low-frequency and high-frequency bands is achieved, which not only improves the vibration transmission efficiency, but also ensures the stability and ease of use of the device. This structure forms a closed magnetic field inside the vibrator, reducing electromagnetic interference and energy loss, making the vibrator's response in different frequency bands more uniform and accurate, and is particularly suitable for audio transmission and tactile feedback scenarios with multi-band requirements. Through this improvement, the present invention provides an efficient, stable and easy-to-mass-produce solution for multi-band bone conduction devices and precise tactile feedback devices, filling a gap in the existing technology.

[0021] To achieve the above-mentioned object, the present invention provides the following technical solution: a dual-mover actuator of a lever-type spring sheet, characterized in that it includes a spring sheet, a peripheral support structure, a first mover assembly, and a second mover assembly;

[0022] The spring piece includes a central portion, a peripheral portion and a connecting rod. The peripheral portion of the spring piece is fixedly connected to the peripheral support structure. The connecting rod includes an end force point A, the end force point A is located at the central portion of the spring piece, an intermediate force point B and an end force point O. The end force point O is located at the peripheral portion of the spring piece. The first movable component is connected to the end force point A or O, and the second movable component is connected to the intermediate force point B. The double movable component structure generates two or more resonance peaks.

[0023] Electromagnetic interaction forces of equal magnitude and opposite direction are generated between the mover assembly 1 and the mover assembly 2. Through a lever-type force relationship, the center part at the endpoint force point A or the peripheral part at O ​​is pried up to output the force externally. This mechanical relationship forms a lever-type force relationship, and the force at the center part at the endpoint force point A or the peripheral part at O ​​is increased, thereby improving the actuation performance of the actuator.

[0024] Preferably, if the dual-motor actuator transmits force to the actuator body through the peripheral part or the peripheral support structure, then the position of the vibrator output force is the peripheral part or the peripheral support structure. At this time, the center part at the end force point A and the middle force point B are connected to the actuator component one and the actuator component two respectively. At this time, the electromagnetic forces of the same magnitude and opposite directions at A and B form a lever relationship with the force of the peripheral part at O.

[0025] Preferably, if the dual-motor actuator transmits force to the actuator body through the middle part, the position of the vibrator output force is the middle part. At this time, the peripheral part at the end force point O and the middle force point B are connected to the mover component one and the mover component two respectively. At this time, the electromagnetic forces of the same magnitude and opposite directions at O ​​and B form a lever relationship with the force of the middle part at A.

[0026] Preferably, the connection points A, B and O are located on the extension line to form a lever-type force relationship, ensuring the movement relationship between the spring, movable subassembly 1, movable subassembly 2 and the peripheral support structure to ensure that the vibration moves in a lever-type motion manner.

[0027] Preferably, viewed from the center outward, the movable subassembly 1 is inside, and the movable subassembly 2 is outside, or the movable subassembly 1 is outside, and the movable subassembly 2 is inside, and the peripheral support structure is fixedly connected to the outer ring of the spring piece to form an integral support structure; the movable subassembly 1, the movable subassembly 2, and the fixed peripheral support structure are fixedly connected to at least three locations of the spring piece, and gaps are left between the movable subassembly 1 and the movable subassembly 2, as well as between the movable subassembly 2 and the peripheral support structure, so that the movable subassembly can vibrate;

[0028] Preferably, the movable subassembly 1 and the movable subassembly 2 adopt any of the following structural relationships:

[0029] Method 1 is the magnetic coil parallel type: the mover assembly 1 is the magnet assembly, and the mover assembly 2 is the coil assembly;

[0030] The second method is the coil-magnetic parallel type: the first movable component is the coil component, and the second movable component is the magnet component;

[0031] The third method is the parallel connection of the moving iron and moving magnetic coil: the first moving component is the iron core component, and the second moving component is the magnetic coil component;

[0032] Method four is the moving iron and moving coil magnet parallel type: the moving component one is the iron core component, and the moving component two is the coil magnet component.

[0033] Preferably, the first movable component is a magnet component, and the second movable component is a coil component, wherein the magnet component includes a magnet fixedly connected to a conductive disk up and down; the coil component includes a yoke, symmetrically distributed coils and a magnetic conductive ring, forming a closed electromagnetic circuit to enhance the electromagnetic effect.

[0034] Preferably, the first mover assembly is a coil assembly, and the second mover assembly is a magnet assembly. The coil assembly includes symmetrically arranged coils, and the currents in the coils are in opposite directions to form a symmetrical electromagnetic field to enhance the stability of the vibration.

[0035] Preferably, the first movable component is an iron core, and the second movable component is a magnet coil component. The magnet coil component includes symmetrically distributed magnets and magnetic rings. The coil is attached to the yoke by gluing or other means to form a closed electromagnetic circuit. We call this method the moving iron and moving coil magnetic type.

[0036] Preferably, the first movable component is an iron core, and the second movable component is a magnet coil component. The magnet coil component includes symmetrically distributed coils and magnetic rings. The magnet is attached to the yoke by gluing or other means to form a closed electromagnetic circuit. We call this method the moving iron and moving magnet coil type.

[0037] Preferably, the spring piece includes a double-sided or single-sided structure, wherein the peripheral support structure can be a cylindrical support member or a fixed support member in other forms. The peripheral support structure encloses the spring piece and the movable subassembly therein to reduce external environmental interference and ensure stable operation of the vibrator.

[0038] Preferably, the spring pieces adopt a single-layer or multi-layer stacking structure to form multi-layer spring pieces to improve vibration efficiency and intensity, so that the vibration response effect in the double resonance peak state is more stable.

[0039] Preferably, the peripheral portion of the shrapnel is fixedly connected to the peripheral support structure and fixed by gluing, welding, riveting, etc., so as to improve the rigidity of the overall structure and ensure that the device remains stable during long-term vibration.

[0040] Preferably, it includes at least one magnetic action domain, which refers to a spatial region where magnetic interaction occurs under the action of an electromagnetic field, including an area where attraction or repulsion occurs between a permanent magnet and a magnetic conductor.

[0041] Preferably, the frequency response range is 20-20,000 Hz, with significant resonance peaks at both low and high frequencies, meeting the multi-band requirements of bone conduction audio devices and tactile feedback devices.

[0042] As a preference, the two spring coefficients k2 and k3 of the double-actuator actuator of the lever-type spring are related to the mass of the relevant components in the actuator and the two target resonant frequencies of the actuator.

[0043] As a preference, the connecting rod OB segment has a corresponding stiffness coefficient of ks1, the connecting rod BA segment has a corresponding stiffness coefficient of ks2, and the connection is the moving subassembly 2; the connecting rod OB segment and the moving subassembly 1, and the connecting rod BA segment and the moving subassembly 2 form two independent vibration subsystems, and the two vibration subsystems are connected to the peripheral support structure in series. The stiffness coefficient of the connecting rod BA segments on both sides of the first moving subassembly is k s1,1 and k s1,2 The stiffness coefficient of the connecting rod OB section on both sides of the second movable subassembly is k s2,1 and k s2,2 , the stiffness coefficient of the movable component is k r1 =k s1,1 +k s1,2 , the stiffness coefficient of the second movable component is k r2 =k s2,1 +k s2,2 , total shell mass m shell =m 外筒sleeve +m springs， For the sake of simplicity, it is assumed that the damping of the spring is very small, close to zero, and it is assumed that the electromagnetic force between the mover assembly 1 and the mover assembly 2 interacts with each other. The forces on the mover assembly 1 and the mover assembly 2 are F r1 and F r2 , according to Newton's third law, F r1 =-F r2 , m1=m shell =m 外筒sleeve +m springs , m2=m r1 , m3=m r2 , k s1＝ k2, k r2 =k3.

[0044] The application of the dual-actuator actuator of the lever-type shrapnel is suitable for bone conduction headphones, bone conduction glasses, wired headphones, wireless headphones, AR glasses, VR glasses, smart watches, smart bracelets, head-mounted devices, wearable devices, smart phones, game controllers, game headphones, game steering wheels, game pedals, mice, keyboards, touch screens, electrical control panels, touch devices, screen sound devices, vehicle-mounted tactile feedback devices, smart cockpits, game chairs, massage chairs, massagers, tactile feedback vests, tactile feedback gloves, tactile feedback belts, tactile feedback leg devices, auxiliary hearing aids, sleep aids or tactile feedback network interconnection devices.

[0045] The bone conduction vibrator fixing method provided by the present invention has the following beneficial effects:

[0046] The lever-type spring-type dual-actuator actuator of the present invention effectively solves the problems of single-band response and insufficient vibration efficiency mentioned in the background technology through collaborative innovation of structure and electromagnetic design, and provides a new technical solution for multi-band vibration and efficient audio and tactile transmission.

[0047] First, the first actuator is connected to the endpoint force point A or O, and the second actuator is connected to the middle force point B. The dual-acting structure generates two or more resonant peaks. Equal and opposite electromagnetic interaction forces are generated between the first and second actuators. Through a lever-type force relationship, the center of the endpoint force point A or the peripheral portion of the O is pried up to output the force. This mechanical relationship forms a lever-type force relationship, which increases the force of the center of the endpoint force point A or the peripheral portion of the O, thereby improving the actuation performance of the actuator. By introducing a lever-type force relationship into the shrapnel structure, the present invention enables the vibrator to achieve stable resonant peak response in two different frequency bands. This actuator capable of generating two or more resonant peaks breaks through the limitations of traditional single-frequency vibrators, enabling the vibrator to achieve effective vibration resonance at both low and high frequencies, thereby overcoming the shortcomings of the existing technology of insufficient single-band response. In the application of bone conduction audio equipment, this dual-band resonance characteristic significantly enhances the clarity and layering of audio transmission. Through this innovative design, the present invention successfully solves the demand for multi-band response in the background technology, making the audio device more accurate in sound reproduction and meeting the requirements of high-quality audio output.

[0048] In addition, the present invention further enhances the electromagnetic efficiency and vibration accuracy of the vibration system through the closed magnetic loop formed by the first magnetic conductive ring and the second magnetic conductive ring. This closed magnetic loop not only concentrates the magnetic force on the vibration area of ​​the shrapnel to ensure the efficient use of the magnetic field, but also reduces the ineffective dispersion of the electromagnetic force, greatly reducing the impact of electromagnetic interference on vibration transmission. In this way, the vibrator exhibits higher energy utilization efficiency during operation, which not only enhances the effect of vibration transmission, but also significantly reduces energy loss. This improvement is particularly important in bone conduction devices, because the reduction in energy loss directly means an extension of battery life. Users can get a longer period of high-quality audio experience when using wearable devices without the need for frequent charging, which greatly improves the portability and ease of use of the device.

[0049] It is worth mentioning that the closed magnetic loop design of the present invention performs particularly well in tactile feedback devices. The closed magnetic loop not only ensures that the magnetic field is concentrated on the vibration area, but also makes the vibration response more precise and rapid. For example, in the application scenarios of smart cockpits or game controllers, the vibrator can achieve precise control of vibration frequency and strength through a closed magnetic loop, providing users with highly layered tactile feedback. When the user is touching, the vibrator can quickly respond to different tactile demands, thereby simulating a real feedback experience. This precise control and stable response significantly improves the authenticity and immersion of the tactile feedback, effectively making up for the shortcomings of traditional single-frequency vibration feedback.

[0050] The multi-layer structure design of the present invention further reduces the overall volume of the vibrator, allowing the device to be miniaturized while maintaining high vibration efficiency. In portable devices such as bone conduction headphones and smart glasses, volume and weight have a direct impact on user experience. The multi-layer structure of the present invention not only reduces the space occupied by the device, but the synergistic vibration effect of the multi-layer structure also improves the response efficiency of the vibrator, making the vibration transmission effect more concentrated and clear. Therefore, users can enjoy a lightweight and comfortable experience when wearing it, and the use effect will not be affected by the excessive weight of the device.

[0051] In summary, the dual-actuator actuator of the present invention effectively solves the problems of single-frequency response and insufficient energy efficiency in the background technology with its innovative structural design and efficient magnetic circuit configuration. Through the unique design of the lever-type and scissor-type force-bearing structure, and the efficient use of the closed magnetic circuit, the present invention not only improves the expressiveness and response stability of multi-band vibrations, but also significantly extends the battery life and comfort of the device, allowing the device to exhibit excellent performance in audio transmission and tactile feedback. This design has shown obvious advantages in practical applications and has promoted the leapfrog development of bone conduction technology and tactile feedback technology.

[0052] The present invention proposes a dual-resonance peak oscillator with a lever-type spring. It has the following advantages:

[0053] 1. Multi-band response: With wide frequency coverage, the dual-resonance peak oscillator of the lever-type shrapnel can produce significant resonance at two or more different frequencies at the same time, providing a wider frequency response range, which enables better processing of high-frequency and low-frequency sounds and improves the overall sound quality; audio separation, through two or more resonance peak technology, can more clearly separate the sounds of different frequency bands, reduce distortion and interference, and improve audio clarity and detail performance.

[0054] 2. Reduce distortion: Balanced response, the dual resonance peak oscillator design of the lever-type shrapnel can balance the response of different frequencies, reduce the problem of a single frequency being too strong or too weak, and provide a more balanced sound output; reduce resonance distortion, by precisely controlling the two resonant frequencies, reduce unnecessary resonance distortion and improve the purity of the audio.

[0055] 3. Enhanced efficiency: Efficient vibration transmission. The design of the double-resonance peak oscillator of the lever-type spring can more efficiently transmit vibration energy, reduce energy loss, and improve the overall efficiency of the equipment; low power consumption. Since the vibrator can operate at its resonant frequency, the required driving power is lower, thereby reducing the power consumption of the equipment.

[0056] 4. Comfortable listening experience: Natural sound quality, the wide-band response and low-distortion characteristics of the dual-resonance peak oscillator of the lever-type shrapnel provide more natural sound quality, reduce auditory fatigue, and improve the user's auditory comfort; personalized adjustment, users can adjust the frequency response of the device according to personal preferences and usage scenarios to customize a personalized listening experience.

[0057] 5. Enhanced interactivity: Accurate feedback. In sensors and interactive devices, the dual-resonance peak oscillator of the lever-type shrapnel can provide more accurate vibration feedback and enhance the interactive experience. Intelligent control, combined with intelligent algorithms, can automatically adjust the frequency response according to the environment and usage, thereby improving the intelligence level of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a schematic diagram of the force analysis structure of the lever type structure of the present invention;

[0059] Figure 2 A cross-sectional view of a double-resonance peak oscillator of a lever-type spring with parallel magnetic coils according to the present invention;

[0060] Figure 3-6 It is a schematic structural diagram of the lever-type spring piece of the present invention;

[0061] Figure 7 It is a schematic diagram of the motion of the double-resonance peak oscillator of the lever-type spring of the present invention;

[0062] Figure 8 This is a diagram of the movement points of the lever-type spring element of the present invention;

[0063] Figure 9 This is a deformation diagram of the lever-type spring element of the present invention's double-resonance peak oscillator;

[0064] Figure 10 It is a schematic structural diagram of a double-resonance peak oscillator of a lever-type spring with parallel magnetic coils according to the present invention;

[0065] Figure 11It is a schematic diagram of the structure of a double-resonance peak oscillator of a lever-type spring with coil-magnetic parallel connection;

[0066] Figure 12 It is a schematic diagram of the structure of a double-resonance peak oscillator with a lever-type spring and a moving iron and a moving magnetic coil in parallel;

[0067] Figure 13 It is a schematic diagram of the structure of a double-resonance peak oscillator with a lever-type spring and a moving iron and moving coil magnetic parallel connection;

[0068] Figure 14-15 It is a schematic diagram of the explosion structure of the double-resonance peak oscillator of the lever-type shrapnel of the present invention;

[0069] Figure 16 It is a structural schematic diagram of the outer cylinder of the present invention;

[0070] Figure 17 This is the standard view of the double-resonance peak oscillator of the lever-type spring in the simulation assembly in Abaqus;

[0071] Figure 18 The top view of the double-resonance peak oscillator of the lever-type spring is simulated in Abaqus;

[0072] Figure 19 This is the main view of the dual-resonance peak oscillator of the lever-type spring in the simulation assembly in Abaqus;

[0073] Figure 20 This is the mesh diagram of the double-resonance peak oscillator of the lever-type spring in Abaqus simulation;

[0074] Figure 21-22 This is the simulation result diagram of the double-resonance peak oscillator of the lever-type spring in Abaqus;

[0075] Figure 23-24 This is the actual test effect diagram of the double-resonance peak oscillator of the lever-type shrapnel;

[0076] Figure 25 1 is a schematic structural diagram of a double-actuator actuator with a lever-type spring according to Example 13 of the present invention; Figure 26 This is a force analysis diagram of the lever-type spring piece of the present invention; Figures 27-28 The vibration model of a double-spring shrapnel oscillator; Figures 29-30 The vibration model of the oscillator of two double-spring domes; Figure 31 is the frequency response curve of the single vibration subsystem of the present invention; Figure 32 This is the frequency response curve of the dual vibration subsystem of the present invention. DETAILED DESCRIPTION

[0077] To further illustrate the technical means and effectiveness of the present invention in achieving its intended objectives, the following detailed description is provided with reference to the accompanying drawings and preferred embodiments. In the following description, references to "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0078] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0079] Example 1

[0080] Please refer to Figure 1-2 The present invention relates to a dual-motor actuator with a lever-type spring, comprising a spring 1, a peripheral support structure 2 (such as an outer cylinder), a first mover assembly 3, and a second mover assembly 4. The spring 1 can be a double-sided or single-sided structure. The double-sided structure means that there is a spring 2 at each end of the outer cylinder, while the single-sided structure means that there is a spring 1 at only one end of the outer cylinder. The spring is used to transmit vibration. The outer ring of the spring 1 is connected to a fixed peripheral support structure 2 (such as an outer cylinder), and the peripheral support structure 2 is used to support and fix the spring 1. The design of this structure ensures the stability of the vibrator during vibration, enabling it to produce significant resonance peaks in both the high-frequency and low-frequency ranges.

[0081] The spring piece 1 includes a central portion, a peripheral portion and a connecting rod. The peripheral portion of the spring piece 1 is fixedly connected to the peripheral support structure 2. The connecting rod includes an end force point A, which is located at the central portion of the spring piece, an intermediate force point B and an end force point O. The end force point O is located at the peripheral portion of the spring piece. The first movable component is connected to the end force point A or O, and the second movable component is connected to the intermediate force point B. The double movable component structure generates two or more resonance peaks.

[0082] Electromagnetic interaction forces of equal magnitude and opposite direction are generated between the mover assembly 1 3 and the mover assembly 2 4. Through a lever-type force relationship, the central part at the end point force point A or the peripheral part at O ​​is pried up to output the force to the outside. This mechanical relationship forms a lever-type force relationship, and the force at the central part at the end point force point A or the peripheral part at O ​​is increased, thereby improving the actuation performance of the actuator.

[0083] If the dual-actuator actuator transmits force to the actuator body through the peripheral part or the peripheral support structure, then the position where the vibrator outputs force is the peripheral part or the peripheral support structure. At this time, the center part at the end force point A and the middle force point B are connected to the actuator component 1 3 and the actuator component 2 4 respectively. At this time, the electromagnetic forces of the same magnitude and opposite directions at A and B form a lever relationship with the force of the peripheral part at O.

[0084] If the dual-actuator actuator transmits force to the actuator body through the middle part, then the position where the vibrator outputs force is the middle part. At this time, the peripheral part at the end force point O and the middle force point B are connected to the actuator component 1 3 and the actuator component 2 4 respectively. At this time, the electromagnetic forces of the same magnitude and opposite directions at O ​​and B form a lever relationship with the force of the middle part at A.

[0085] In the present invention, the peripheral support structure 2, movable subassembly 1 3, movable subassembly 2 4, and spring 1 are fixedly connected at at least two points. The rational layout of these connection points ensures that movable subassembly 1 3 and movable subassembly 2 4 maintain appropriate force relationships between the spring and the peripheral support structure during vibration. Appropriate gaps are maintained between movable subassembly 1 3 and movable subassembly 2 4, and between movable subassembly 2 4 and the peripheral support structure 2, providing space for the movable subassemblies to vibrate freely and avoiding energy loss due to structural contact during vibration.

[0086] Electromagnetic forces interact between mover assembly 1 3 and mover assembly 2 4. Mover assembly 1 3 is subject to the force of mover assembly 2 4, while mover assembly 2 4 is also subject to the reaction force of mover assembly 1 3. The forces acting on both components are equal in magnitude and opposite in direction. This force distribution design ensures that the mover assemblies maintain equilibrium during vibration, avoiding unnecessary vibration shifts and enabling the entire oscillator system to maintain a stable resonant state across different frequency bands.

[0087] Please refer to Figure 1 Through the rational design of the connection points and support structure, the connection between the mover assembly and the spring forms a lever-like force relationship. Specifically, assuming that the connection point of mover assembly 1 3 is point A, the connection point of mover assembly 2 4 is point B, and the fixed connection point between the outer ring of the spring and the peripheral support structure is point O, based on the positional relationship of these connection points, if point O lies on the extension line of A and B, a lever-like force relationship is formed. This combination of force distribution enables the oscillator to produce a significant resonant peak response in both frequency bands.

[0088] Example 2

[0089] like Figure 3-4As shown, according to one embodiment of the present invention, a spring clip 1 comprises a central portion 1A, a peripheral portion 1B, a connecting rod 1C, an inner tube connection point 1D, and a through-hole 1E. Central portion 1A is used to connect to movable assembly 1 3, and methods such as welding, gluing, or riveting can be used to ensure a secure connection between the spring clip and movable assembly. Connecting rod 1C is used to connect to movable assembly 2 4, and methods such as welding, gluing, or riveting can be used to ensure a secure connection between the spring clip 1 and movable assembly. Peripheral portion 1B is fixedly connected to the peripheral support structure 2 (such as the outer tube), providing overall support for the spring clip 1 and forming a supporting portion for the spring clip 1, ensuring that it does not deviate or loosen during vibration. Inner tube connection point 1D is fixedly connected to the inner tube, and methods such as welding, gluing, or riveting can be used to ensure a secure connection between the spring clip 1 and the inner tube. The present invention provides a more stable connection method, with the inner tube connection point connecting to the inner tube and the peripheral portion connecting to the outer tube. This method does not require drilling holes in the connecting rod, greatly improving assembly stability and practical production convenience. The connection between the inner tube connection point and the peripheral portion 1B is stronger, so that F1 (the second resonance frequency resonance peak) provides a wider bandwidth.

[0090] Example 3

[0091] like Figure 5-6 As shown, according to one embodiment of the present invention, a spring fragment 1 comprises a central portion 1A, a peripheral portion 1B, a connecting rod 1C, an inner cylinder connection point 1D, a through-hole 1E, and a connecting rod 2 1F. Central portion 1A is used to connect to movable assembly 1 3, and welding, gluing, or riveting can be used to ensure a secure connection between the spring fragment 1 and movable assembly 3. Peripheral portion 1B is fixedly connected to an external support structure 2 (e.g., an outer cylinder), providing overall support for the spring fragment 1 and forming the supporting portion of the spring fragment 1, ensuring that it does not deflect or loosen during vibration.

[0092] Connecting rod 1C connects the central portion 1A to the peripheral portion 1B, providing symmetrical elastic support during vibrator operation. The design of connecting rod 1C and connecting rod 2 1F ensures that the spring plate maintains balance during Z-axis vibration, avoiding vibration instability caused by asymmetrical support. Preferably, connecting rod 2 1F also features a central connection point 1G for connecting to the inner cylinder and securing it to the bracket below, enhancing the stability of the overall structure.

[0093] The vibration frequency can be adjusted by adjusting the length or material of the connecting support rod 1C and the connecting support rod 2 1F. For example, if the length of the connecting support rod 1C and the connecting support rod 2 1F is shortened, the vibration frequency is higher, and if the length of the connecting support rod 1C and the connecting support rod 2 1F is lengthened, the vibration frequency is lower. It can be flexibly adjusted according to needs.

[0094] Example 4

[0095] like Figure 7-9 The figure shows the basic motion of a dual-actuator actuator using a lever-type spring element, according to one embodiment of the present invention. Specifically, the spring element's center, point A, connects to mover assembly 1 (3); the central connection point, point B, connects to mover assembly 2 (4); and the peripheral portion, point O, connects to the peripheral support structure (e.g., an outer cylinder). Connecting rod 1C connects points A, B, and O, forming a specific force-bearing structure during vibration.

[0096] When movable subassembly 1 3 and movable subassembly 2 4 vibrate, point A moves upward while point B moves downward, simultaneously driving point O to vibrate at its supporting position. Conversely, when point A moves downward, point B moves upward, also causing point O to vibrate. Furthermore, the forces exerted by movable subassembly 1 and movable subassembly 2 are opposite and of equal magnitude. When point A moves upward, point B moves downward, driving point O to move. When point A moves downward and point B moves upward, this drives point O to move, creating a lever-like force relationship to generate force and vibration. When the force direction is reversed, the force response is also reversed. Because this force relationship exhibits a lever effect, the vibrator can convert force and vibration during vibration, thereby achieving dual-resonance peak characteristics. This design ensures that the force response changes accordingly when the vibration direction changes, ensuring that the vibrator's resonance effect is fully realized in both high- and low-frequency ranges.

[0097] In the embodiments of the present invention, four main design methods for the movable element components are described: Method 1 is the magnetic coil parallel type, and Method 2 is the coil magnet parallel type. Specifically, the magnetic coil parallel type means that movable element 1 (3) is a magnet component, while movable element 2 (4) is a coil component; the coil magnet parallel type means that movable element 1 (3) is a coil component, while movable element 2 (4) is a magnet component; Method 3 is the moving iron and moving magnet coil parallel type, where movable element 1 is an iron core component and movable element 2 is a magnetic coil component; Method 4 is the moving iron and moving magnet parallel type, where movable element 1 is an iron core component and movable element 2 is a coil magnet component.

[0098] like Figure 10 As shown, method one is the parallel-coil design. This design uses the magnetic force of the magnet assembly and the current of the coil assembly to form an electromagnetic force, enabling the mover assembly to produce significant resonance at the dual-resonance peak frequency. This design optimizes the utilization efficiency of electromagnetic energy, allowing the vibrator to maintain a stable vibration response at different frequencies. In the parallel-coil design, the interaction between the coil assembly and the magnet assembly is optimized through the design of the magnetic ring and yoke, which further improves the vibration efficiency and resonance characteristics.

[0099] In an embodiment of the present invention, a dual-motor actuator of a lever-type spring piece includes: a spring piece 1 (a double-sided spring piece), a fixed peripheral support structure 2, a mover assembly 3 and a mover assembly 2 4; viewed from the center outward, the mover assembly 1 3 is inside, the mover assembly 2 4 is outside, and the peripheral support structure 2 is fixedly connected to the outer ring of the spring piece 1 to form an overall support structure; the mover assembly 1 3, the mover assembly 2 4, the fixed peripheral support structure 2 and at least three positions of the spring piece 1 are fixedly connected, and gaps are left between the mover assembly 1 3 and the mover assembly 2 4 and between the mover assembly 2 4 and the peripheral support structure 2 to allow the mover assembly to vibrate; wherein, an interaction force is generated between the mover assembly 1 3 and the mover assembly 2 4, and the force applied to the mover assembly 1 3 is equal in magnitude and opposite in direction to the force applied to the mover assembly 2 4; this mechanical relationship forms a lever-type force relationship, thereby generating two significant resonance peaks.

[0100] In this embodiment of the present invention, viewed from the center outward, the magnet assembly is internal and the coil assembly is external. Mover assembly 1 3 is the magnet assembly, and mover assembly 2 4 is the coil assembly. The magnet assembly comprises a magnet 7, a first guide disk 10, and a second guide disk 11. The upper portion of the magnet 7 is fixedly connected to the first guide disk 10, and the lower portion is fixedly connected to the second guide disk 11, forming a structure that concentrates the magnetic field. The design of the upper and lower symmetrical guide disks effectively concentrates the magnetic lines of force in the vibration area, reducing magnetic field leakage and improving electromagnetic efficiency.

[0101] The coil assembly is formed by combining a yoke 12 with symmetrically arranged coils 13 and a magnetic ring 14. The yoke 12 is fixed to the inner cylinder 6, which is fixedly connected to the inner cylinder connection point 1D of the spring 1, forming a closed electromagnetic circuit. When current passes through the coil, the yoke 12 concentrates the magnetic field, and the magnetic ring 14 ensures that the magnetic field is evenly distributed between the mover assembly and the magnet assembly. In this way, mover assembly 1 3 and mover assembly 2 4 can vibrate along a specific direction of the spring 1 under the drive of the electromagnetic force, ensuring that the vibrator achieves dual resonance peaks within the set frequency range.

[0102] Example 6

[0103] like Figure 11 As shown, the second method is the coil-magnet parallel type. This design uses the magnetic force of the magnet assembly and the current of the coil assembly to form an electromagnetic force, enabling the mover assembly to produce significant resonance at the dual-resonance peak frequency. This design optimizes the utilization efficiency of electromagnetic energy, allowing the vibrator to maintain a stable vibration response at different frequencies. In the coil-magnet parallel design, the interaction between the coil assembly and the magnet assembly is optimized through the design of the magnetic ring and yoke, which further improves the vibration efficiency and resonance characteristics.

[0104] In an embodiment of the present invention, a dual-motor actuator of a lever-type spring piece includes: a spring piece 1 (a double-sided spring piece), a fixed peripheral support structure 2, a mover assembly 3 and a mover assembly 2 4; viewed from the center outward, the mover assembly 1 3 is inside, the mover assembly 2 4 is outside, and the peripheral support structure 2 is fixedly connected to the outer ring of the spring piece 1 to form an overall support structure; the mover assembly 1 3, the mover assembly 2 4, the fixed peripheral support structure 2 and at least three positions of the spring piece 1 are fixedly connected, and gaps are left between the mover assembly 1 3 and the mover assembly 2 4 and between the mover assembly 2 4 and the peripheral support structure 2 to allow the mover assembly to vibrate; wherein, an interaction force is generated between the mover assembly 1 3 and the mover assembly 2 4, and the force applied to the mover assembly 1 3 is equal in magnitude and opposite in direction to the force applied to the mover assembly 2 4; this mechanical relationship forms a lever-type force relationship, thereby generating two significant resonance peaks.

[0105] In this embodiment of the present invention, viewed from the center outward, the coil assembly is located inside and the magnet assembly is located outside. Mover assembly 1 3 is the coil assembly, and mover assembly 2 4 is the magnet assembly. The coil assembly comprises a coil 13, a first conductive disk 10, and a second conductive disk 11. The upper portion of coil 7 is fixedly connected to the first conductive disk 10, and the lower portion is fixedly connected to the second conductive disk 11, forming a structure that concentrates the magnetic field. The design of the upper and lower conductive disks effectively concentrates the magnetic lines of force in the vibration area, reducing magnetic field leakage and improving electromagnetic efficiency.

[0106] The magnet assembly is formed by combining a yoke 12 with symmetrically arranged magnets 7. The yoke 12 is fixed to the inner cylinder 6, which is fixedly connected to the inner cylinder connection point 1D of the spring 1, forming a closed electromagnetic circuit. When current flows through the coil, the yoke 12 concentrates the magnetic field. This allows the first and second mover assemblies 3 and 4 to vibrate along a specific direction of the spring 1 under the electromagnetic force, ensuring that the vibrators achieve dual resonance peaks within the set frequency range.

[0107] Example 7

[0108] like Figure 12 As shown, method three is a parallel moving-iron and moving-magnetic-coil design, where mover assembly 1 (3) is the core assembly and mover assembly 2 (4) is the magnetic coil assembly. The parallel moving-iron and moving-magnetic-coil design creates an electromagnetic force through the magnetic force of the magnetic coil assembly and the current of the coil assembly, enabling the mover assembly to produce significant resonance at the dual-resonance peak frequency. This design optimizes the utilization efficiency of electromagnetic energy, allowing the vibrator to maintain a stable vibration response at different frequencies. For the parallel moving-iron and moving-magnetic-coil design, the interaction between the magnetic coil assembly and the core assembly is optimized through the design of the magnetic ring and yoke, further concentrating the electromagnetic force and improving vibration efficiency and resonance characteristics.

[0109] In an embodiment of the present invention, a dual-motor actuator of a lever-type spring piece includes: a spring piece 1 (a double-sided spring piece), a fixed peripheral support structure 2, a mover assembly 3 and a mover assembly 2 4; viewed from the center outward, the mover assembly 1 3 is inside, the mover assembly 2 4 is outside, and the peripheral support structure 2 is fixedly connected to the outer ring of the spring piece 1 to form an overall support structure; the mover assembly 1 3, the mover assembly 2 4, the fixed peripheral support structure 2 and at least three positions of the spring piece 1 are fixedly connected, and gaps are left between the mover assembly 1 3 and the mover assembly 2 4 and between the mover assembly 2 4 and the peripheral support structure 2 to allow the mover assembly to vibrate; wherein, an interaction force is generated between the mover assembly 1 3 and the mover assembly 2 4, and the force applied to the mover assembly 1 3 is equal in magnitude and opposite in direction to the force applied to the mover assembly 2 4; this mechanical relationship forms a lever-type force relationship, thereby generating two significant resonance peaks.

[0110] In this embodiment of the present invention, viewed from the center outward, the core assembly is located inside and the magnetic coil assembly is located outside. Mover assembly 1 3 is the core assembly, and mover assembly 2 4 is the magnetic coil assembly. The core assembly includes an iron core, the ends of which are fixedly connected to the central portion 1A of the spring 1. The vertically symmetrical design of the magnetic ring 14 effectively concentrates magnetic lines of force in the vibration area, reducing magnetic field leakage and improving electromagnetic efficiency.

[0111] The magnetic coil assembly is obtained by combining a yoke 12 with symmetrically arranged coils 13 and a magnetic ring 14. Magnet 7 is fixed to the inner side of yoke 12, wherein yoke 12 is fixed to inner cylinder 6, and inner cylinder 6 is fixedly connected to the inner cylinder connection point 1D of spring 1, forming a closed electromagnetic circuit. When current passes through the coil, yoke 12 concentrates the magnetic field and ensures the uniform distribution of the magnetic field between the mover assembly and the magnet assembly through magnetic ring 14. In this way, mover assembly 1 3 and mover assembly 2 4 can vibrate along the specific direction of spring 1 under the drive of electromagnetic force, ensuring that the vibrator achieves dual resonance peaks within the set frequency range.

[0112] Example 8

[0113] like Figure 13 As shown, method four is a parallel moving-iron and moving-coil magnetic type, where the first moving element is the core assembly and the second moving element is the coil magnetic assembly. The parallel moving-iron and moving-coil magnetic design forms an electromagnetic force through the magnetic force of the coil assembly and the current of the coil assembly, enabling the moving element assembly to produce significant resonance at the dual-resonance peak frequency. This design optimizes the utilization efficiency of electromagnetic energy, allowing the vibrator to maintain a stable vibration response at different frequencies. For the parallel moving-iron and moving-coil magnetic type, the interaction between the coil magnetic assembly and the core assembly is optimized through the design of the magnetic ring and yoke, making the electromagnetic force more concentrated, further improving the vibration efficiency and resonance characteristics.

[0114] In an embodiment of the present invention, a dual-motor actuator of a lever-type spring piece includes: a spring piece 1 (a double-sided spring piece), a fixed peripheral support structure 2, a mover assembly 3 and a mover assembly 2 4; viewed from the center outward, the mover assembly 1 3 is inside, the mover assembly 2 4 is outside, and the peripheral support structure 2 is fixedly connected to the outer ring of the spring piece 1 to form an overall support structure; the mover assembly 1 3, the mover assembly 2 4, the fixed peripheral support structure 2 and at least three positions of the spring piece 1 are fixedly connected, and gaps are left between the mover assembly 1 3 and the mover assembly 2 4 and between the mover assembly 2 4 and the peripheral support structure 2 to allow the mover assembly to vibrate; wherein, an interaction force is generated between the mover assembly 1 3 and the mover assembly 2 4, and the force applied to the mover assembly 1 3 is equal in magnitude and opposite in direction to the force applied to the mover assembly 2 4; this mechanical relationship forms a lever-type force relationship, thereby generating two significant resonance peaks.

[0115] In this embodiment of the present invention, viewed from the center outward, the core assembly is located inside, and the coil magnetic assembly is located outside. Mover assembly 1 3 is the core assembly, and mover assembly 2 4 is the coil magnetic assembly. The core assembly includes an iron core, the ends of which are fixedly connected to the central portion 1A of the spring 1. The vertically symmetrical conductive disk design effectively concentrates magnetic lines of force in the vibration area, reducing magnetic field leakage and improving electromagnetic efficiency.

[0116] The coil magnet assembly is obtained by combining a yoke 12 with symmetrically arranged magnets 7 and a magnetic ring 14. The coil 13 is fixed to the inner side of the yoke 12, wherein the yoke 12 is fixed to the inner cylinder 6, and the inner cylinder 6 is fixedly connected to the inner cylinder connection point 1D of the spring 1, forming a closed electromagnetic circuit. When current passes through the coil, the yoke 12 concentrates the magnetic field and ensures that the magnetic field is evenly distributed through the magnetic ring 14. In this way, the movable subassembly 3 and the movable subassembly 4 can vibrate along the specific direction of the spring 1 under the drive of the electromagnetic force, ensuring that the vibrator achieves dual resonance peaks within the set frequency range.

[0117] In summary, the present invention achieves dual-band resonance characteristics through a rational structural design, including the double-sided or single-sided structure of the spring 1, the fixed connection between the movable components and the peripheral support structure, the spacing between the movable components, and the lever-type and scissor-type force relationship. This innovative design provides a more efficient and stable vibration solution for bone conduction audio devices and tactile feedback devices, with significant advantages in optimizing audio transmission and tactile feedback.

[0118] In an embodiment of the present invention, the spring 1 can be a single-layer or multi-layer stacked structure to achieve improved vibration efficiency. The multi-layer stacked spring 1 enhances the response strength of the vibrator through the interaction of multiple elastic layers within a limited space, significantly improving the vibration transmission efficiency. The multi-layer design not only increases the elastic modulus of the spring, but also expands the vibration frequency response range, making it suitable for audio devices or tactile feedback devices with different frequencies.

[0119] In a multilayer structure, each layer of springs 1 resonates at different frequencies, creating a synergistic effect, enhancing the dual resonance peaks at both low and high frequencies. This multilayered spring design is suitable for devices requiring high performance across multiple audio frequency bands, such as bone conduction headphones and VR / AR devices, ensuring clear audio transmission and stable tactile feedback. This multilayered design also enhances vibration performance while miniaturizing the device, making it ideal for portable applications.

[0120] In an embodiment of the present invention, the first mover assembly is a magnet assembly. This magnet assembly comprises a magnet 7, a first guide disk 10, and a second guide disk 11. The design of the magnet assembly ensures that the magnetic field is evenly distributed due to the fixed action of the upper and lower guide disks, forming a concentrated magnetic field path, thereby maximizing the utilization of the magnetic force. Specifically, the upper portion of the magnet 7 is fixedly connected to the first guide disk, and the lower portion is fixedly connected to the second guide disk. This ensures that the magnetic lines of force are concentrated in the desired vibration area, reducing magnetic field dispersion and improving electromagnetic conversion efficiency.

[0121] In this design, the precise arrangement of the magnet assembly concentrates the magnetic force near the connection point between the mover assembly and the spring, thereby making the transmission of vibration more stable. This vertically symmetrical design of the magnet assembly ensures that there is no offset during the vibration process, thereby improving the stability of the dual resonance peaks at different frequencies. Preferably, the magnets in the magnet assembly can be made of a high-permeability material such as neodymium iron boron to ensure the strength of the magnetic force, thereby improving the overall vibration effect.

[0122] In an embodiment of the present invention, the second mover assembly in the present invention can be a coil assembly. The design of the coil assembly includes a symmetrically distributed upper and lower coil structure, a magnetic ring and a yoke. The yoke, as the closed structural core of the magnetic field, can concentrate and guide the magnetic field so that the electromagnetic force generated by the coil is concentrated in the direction of movement of the mover assembly. Specifically, the yoke is located at the center of the coil, and the upper and lower coils are symmetrically distributed around the yoke and are respectively connected to the magnetic ring to form a closed magnetic circuit.

[0123] In this design, when current passes through the coil, the magnetic force is distributed along the magnetic ring, which concentrates the electromagnetic force and enhances the vibration transmission efficiency of the coil assembly. The yoke material is preferably a soft magnetic material with high magnetic permeability, such as silicon steel sheet or nickel-based alloy, to improve the concentration effect of the magnetic field, thereby improving vibration efficiency and response speed. Such a coil assembly design is particularly suitable for application scenarios with a wide vibration frequency range, enabling the device to obtain good resonant response in multiple frequency bands, ensuring the efficient realization of the vibrator's dual resonance peak characteristics.

[0124] In embodiments of the present invention, the peripheral support structure can be cylindrical or in other shapes that provide stable support. The peripheral support structure is designed to surround the spring and mover assembly, providing fixed support and protection, thereby reducing the impact of external factors such as air resistance and environmental vibration on the vibrator's operation. The cylindrical support structure effectively encloses the vibration area, concentrating the vibration direction and path, thereby improving vibration transmission efficiency.

[0125] The cylindrical design of the peripheral support structure not only protects the internal shrapnel and actuator components from external interference, but also provides a relatively closed vibration space, effectively reducing energy leakage and improving the resonance efficiency of the dual resonance peaks. This cylindrical design also improves the device's impact resistance, ensuring structural stability and functional reliability during prolonged vibration. It is particularly suitable for devices with high vibration requirements and requiring long-term stable operation, such as bone conduction headphones, smart watches, and VR headsets.

[0126] Example 9

[0127] Please refer to Figure 14-15 , a dual-motor actuator of a lever-type spring piece, comprising: spring pieces 1 and 14 (double-sided spring pieces), a fixed peripheral support structure 6, a mover assembly 1 and a mover assembly 2; viewed from the center outward, the mover assembly 1 is inside, the mover assembly 2 is outside, and the peripheral support structure 6 is fixedly connected to the outer ring of the spring piece 1 to form an integral support structure; the mover assembly 1, the mover assembly 2, the fixed peripheral support structure 6 are fixedly connected to at least three positions of the spring pieces 1 and 14, and gaps are left between the mover assembly 1 and the mover assembly 2, as well as between the mover assembly 2 and the peripheral support structure 6, so that the mover assembly can vibrate; wherein, an interaction force is generated between the mover assembly 1 and the mover assembly 2, and the force applied to the mover assembly 1 is equal to the force applied to the mover assembly 2 in magnitude and opposite in direction; this mechanical relationship forms a lever-type force relationship, thereby generating two significant resonance peaks.

[0128] In the embodiment of the present invention, viewed from the center outward, the coil assembly is outside and the magnet assembly is inside, the first mover assembly is the magnet assembly, and the second mover assembly is the coil assembly.

[0129] In an embodiment of the present invention, the specific structures of the mover assembly 1 and the mover assembly 2 are as follows: it is assumed that the mover assembly 1 and the mover assembly 2 are respectively a magnet assembly and a coil assembly, wherein the magnet assembly comprises a magnet 7 and conductive magnetic disks 3 and 12 symmetrically fixed above and below, the upper part of the magnet 7 is fixedly connected to the conductive magnetic disk 3, and the lower part is fixedly connected to the conductive magnetic disk 12 to form an efficient magnetic force conduction structure; the coil assembly comprises a yoke 8 and coils 5 and 10 symmetrically distributed above and below, the upper part of the yoke 8 is connected to the coil 5, and the lower part is connected to the coil 10, at the same time, the upper part of the coil 5 is fixedly connected to the magnetic conductive ring 4, and the lower part of the coil 10 is fixedly connected to the magnetic conductive ring 11. These components are all fixed in the inner cylinder 9 to form a complete vibration system.

[0130] The design of inner cylinder 9 ensures the stable fixation of all movable components. Positioning plates 2 and 13 are fixedly connected to the top and bottom of the inner cylinder, respectively, further ensuring the overall structural strength of the assembly. Springs 1 and 14 are connected to movable components 1 and 2 via at least one connection point and secured within the outer cylinder 6 of the peripheral support structure, effectively controlling the gaps and vibration free space between the movable components.

[0131] In this structural configuration, a gap is left between mover assemblies 1 and 2, and between mover assemblies 2 and the surrounding support structure, providing the necessary free movement space for dual-resonance peak vibration. The gap design allows vibration to proceed smoothly without external interference, avoiding direct collision and friction with the structure, while ensuring the efficient realization of the oscillator's dual-band resonance characteristics.

[0132] In summary, the present invention ensures that the vibrator produces significant resonance at both low and high frequencies through the design of a multi-layered spring structure, the layout of the magnets and coils in the actuator assembly, the cylindrical design of the peripheral support structure, and precise gap control. This design not only improves the device's vibration transmission efficiency but also significantly enhances the stability and response speed of the dual resonance peaks.

[0133] In an embodiment of the present invention, the various components of the mover assembly are fixedly connected by glue or welding to ensure that the assembly remains stable and does not loosen during vibration. Specifically, the connection between the magnet 7 and the conductive magnetic disk 3 and the conductive magnetic disk 12 can be achieved by high-strength glue or welding, thereby avoiding the displacement of the magnet assembly caused by vibration. The connection between the yoke 8 and the coils 5 and 10 is also made by glue to ensure that the electromagnetic force can act stably on the coils. The coil 5 and the magnetic ring 4, and the coil 10 and the magnetic ring 11 are also fixed with glue to ensure the effective conduction of magnetic and electromagnetic forces.

[0134] In addition, each component in the coil assembly, such as the yoke, the magnetic ring and the coil, is fixedly connected to the inner cylinder 9 to form an integral support system. The fixed connection between the inner cylinder 9 and the positioning plate 2 and the positioning plate 13 can be made by glue or welding, so that the overall structure of the vibrator is more solid. The connection between the outer cylinder 6 of the peripheral support structure and the springs 1, 14 and 11 is fixed by glue or welding, so as to achieve a tight combination between the mover assembly 1 and the mover assembly 2, the springs and the peripheral support structure. Through this integrated fixing method, the dual-motor actuator of the present invention can maintain an efficient and stable vibration response at different operating frequencies and adapt to long-term working requirements.

[0135] Please refer to Figure 16 In an embodiment of the present invention, a flexible printed circuit board (FPC) is attached to the inner surface of the peripheral support structure. The flexible circuit board provides a stable power input and electromagnetic signal control path for the coil assembly by printing a conductive circuit on its surface. The design of the FPC not only makes the welding of coils 5 and 10 more convenient, but also reduces the space occupation problem that may be caused by cable connection. The FPC can be directly connected to the mover assembly one and the mover assembly two, and provides a stable current input to the coil assembly through a precisely designed circuit, ensuring a uniform distribution of the electromagnetic force. The opening method of the outer cylinder 2 can make it easier to lead the FPC wire out of the inner cylinder, which is more convenient for actual production.

[0136] The flexible printed circuit board (FPC) fits snugly onto the inner surface of the outer cylinder, making the entire electrical connection structure more compact and efficient, effectively reducing the risk of failure due to loose connections during device vibration. Furthermore, the FPC design is highly customizable, allowing the layout of the conductive circuit to be adjusted according to specific application scenarios, providing flexible circuit solutions for a variety of bone conduction devices and haptic feedback devices.

[0137] In this embodiment of the present invention, the wires of coils 5 and 10 are routed through pre-defined through-holes in the outer and inner cylinders 6 and 9, and then soldered to the positive and negative terminals of the FPC. This design streamlines the flow of current from the FPC to the coil assembly, reducing current loss caused by loose soldering or uneven resistance. The pre-defined through-holes in the outer and inner cylinders allow the wires to be routed to the FPC via the shortest possible path, making the overall electrical transmission path more efficient.

[0138] Soldering the positive and negative terminals of the FPC ensures stable current input and maintains electrical connection stability even at vibrations of varying frequencies, avoiding the vibration-induced poor connections associated with traditional cable connections. This design significantly improves the stability of the vibrator, particularly in high-frequency vibration scenarios, ensuring consistent current input and electromagnetic field force changes, thereby enhancing the vibrator's vibration accuracy.

[0139] In this embodiment of the present invention, the outer cylinder 6 of the peripheral support structure has a diameter of 4 mm, the inner cylinder 9 has a diameter of 12.3 mm, and the vertical distance between the springs 1 and 11 is 6 mm, meaning the overall thickness of the vibrator is 6 mm. This structural design achieves miniaturization while maintaining the vibrator's functionality, making it suitable for space- and weight-sensitive wearable devices such as bone conduction headphones and smartwatches.

[0140] This miniaturized design of the vibrator provides efficient support for multi-band vibration. The 4mm outer cylinder diameter ensures that the peripheral support structure tightly surrounds the mover assembly and spring, protecting the internal structure from external environmental influences while effectively reducing energy loss. The diameter design of the inner cylinder and the outer cylinder form a cavity, providing sufficient vibration space, allowing mover assemblies 1 and 2 to achieve stable resonance in the dual resonant frequency bands. The thickness design also ensures the concentration of the vibration path, improving the transmission efficiency of the vibration signal.

[0141] In an embodiment of the present invention, the first and second mover assemblies are arranged in a staggered, interlocking pattern, such that the closed curves of the coil's main magnetic field lines and the magnet's main magnetic field lines alternately pass through the mover assembly and stator assembly, respectively. The magnet assembly is positioned internally and the coil assembly externally, creating a parallel magnetic coil structure. This staggered arrangement effectively enhances the closure effect of the magnetic field, allowing the magnetic force to act more concentratedly on the vibration area within the closed loop.

[0142] In this design, the magnets and coils in the actuator assembly are spatially alternating, achieving efficient electromagnetic conversion through alternating closed paths of magnetic field lines. This optimized closed magnetic path reduces electromagnetic field leakage during vibration, making the transmission of vibration signals more concentrated and efficient. This parallel magnetic coil structure, when used in bone conduction devices and haptic feedback devices, can effectively improve the accuracy and response speed of multi-band vibration, providing users with a clearer audio experience and realistic tactile feedback.

[0143] In summary, this invention achieves tight fixation of the actuator assembly, efficient electrical connection of the FPC (flexible printed circuit board), configuration of device miniaturization structural parameters, and optimization of the closed magnetic field path through multi-level structural optimization. These designs not only enhance the vibration efficiency and stability of the dual-resonance peaks, but also ensure the reliability and durability of the device under long-term, high-frequency vibration, further expanding the vibrator's applicability in a variety of application scenarios.

[0144] Example 10

[0145] In embodiments of the present invention, the number and arrangement of magnet and coil assemblies can be further optimized to form a multi-circuit magnetic domain structure, enhancing the vibrator's magnetic field. This design allows the magnets and coils to be symmetrically arranged to form closed main magnetic lines of force within the magnetic field, reducing the magnetic resistance of the magnetic circuit and effectively improving the efficiency of magnetic force transmission.

[0146] When the number of magnets in the mover assembly (N 磁 When it is greater than 1, the polarity of the opposing end faces of adjacent magnets is the same, which creates a synergistic effect between adjacent magnets during magnetic circuit closure, further enhancing the force of the magnetic domain. Furthermore, to reduce the effects of magnetic resistance in the magnetic circuit, magnetically conductive materials, such as yokes and magnetic outer cylinders, can be added around the magnet and coil assemblies to form a combined magnetic conductive structure. This combined structure optimizes the magnetic circuit of the permanent magnets and electromagnets, reduces the impact of magnetic force dispersion on vibration efficiency, and enables the vibrator to maintain efficient vibration response in both low-frequency and high-frequency resonance states.

[0147] The first and second mover components are arranged in a concave-convex staggered manner, and the closed curve of the main magnetic force lines of the coil and the closed curve of the main magnetic force lines of the magnet alternately pass through the mover component and the mover component 2 respectively; the magnet is inside and the coil is outside, which is a magnetic coil parallel type; the magnet is outside and the coil is inside, which is a coil magnet parallel type;

[0148] The double resonance peak oscillator of the lever-type spring, (N 磁 ,N 圈 )=(i,i+1)*n;(N 磁 ,N 圈 ) is written in the order from the center radially outward, with the magnet inside and the coil outside; Nmagnet: the number of magnets; Ncoils: the number of coils; i ranges from 1 to 100; n is a natural number, n = 1, 2, 3...;

[0149] When the number of permanent magnets N is greater than 1, the polarity of the two opposite end faces of adjacent permanent magnets is the same, either both N poles or both S poles. Furthermore, assuming that multiple permanent magnets are arranged symmetrically, the corresponding sizes and magnetic parameters of the symmetrical permanent magnets are the same.

[0150] When the number of coils N is greater than 1, the current directions in adjacent coils must be opposite. In this way, for the electromagnetic field formed by the two adjacent coils, the magnetic field polarity of the two adjacent end faces is the same, either both are N poles or both are S poles. And assuming that the multiple coils are arranged symmetrically, the size and current values ​​of the symmetrical coils are the same. In order to reduce the magnetic resistance of the permanent magnet magnetic circuit and the electromagnet magnetic circuit, a magnetic conductor combination structure is generally designed to minimize the magnetic resistance of the magnetic circuit formed by the permanent magnet and the electromagnet. The magnetic conductor combination structure refers to the combination of the yoke and the coil.

[0151] Including but not limited to, for example, the permanent magnets in the magnet assembly are isolated by magnetic conductors; yokes are used around the coils and magnets, or a magnetic outer cylinder is used for the outer shell, so that the magnetic resistance of the magnetic circuit formed by the permanent magnets and the magnetic circuit formed by the electromagnets are as small as possible.

[0152] In an embodiment of the present invention, the vibrator includes at least one magnetic field. A magnetic field, a spatial region where magnetic interaction occurs under the action of an electromagnetic field, is a key feature of the present invention. This field can be composed of the spatial region between a permanent magnet and a magnetized body, achieving efficient magnetic field closure through the attractive or repulsive forces generated by electromagnetic interaction. This field improves the efficiency of magnetic force utilization during vibration by concentrating the magnetic field.

[0153] The magnetic field can be designed to include multiple magnetic regions, formed by combining multiple permanent magnets and magnetic conductors. The magnetically enclosed area within the magnetic field can be the space between the permanent magnets and the magnetic conductors, or the area between the magnetized magnetic conductors. This spatial design creates a stable magnetic interaction between the components within the magnetic field, effectively improving the response efficiency of the dual-actuator actuator at different frequencies, making vibration transmission more stable and reducing energy loss.

[0154] In an embodiment of the present invention, the frequency response range of the spring is designed to be 20 to 20,000 Hz, accommodating a wide range of applications across bass, midrange, and treble. During the implementation of the present invention, finite element simulation analysis (e.g., using Abaqus software) revealed that the first resonant frequency of the oscillator is 510 Hz, and the second resonant frequency is 2135 Hz. These frequencies are located in the low-frequency and high-frequency regions, respectively, ensuring that the oscillator achieves significant resonance across different frequency bands.

[0155] This dual-band design is suitable for a variety of audio and haptic feedback device applications, delivering excellent vibration penetration in low-frequency bands while providing clear and detailed feedback in high-frequency bands. This wide frequency response range enhances the vibrator's adaptability in a variety of environments, such as providing clear audio transmission in bone conduction headphones and a more realistic touch experience in haptic feedback devices. Through precise control of the frequency response range, the vibrator can provide excellent performance in multiple application scenarios.

[0156] Example 11

[0157] The dual-actuator actuator of the lever-type shrapnel of the present invention can be applied to various audio and tactile feedback devices, including but not limited to bone conduction headphones, bone conduction glasses, wired headphones, wireless headphones, AR glasses, VR glasses, smart watches, smart bracelets and other wearable devices. These devices have high requirements for vibration effects, especially the need to cover a wide frequency band of low and high frequencies at the same time. Through the dual resonance peak characteristics of the present invention, the high-precision requirements of these devices in audio transmission and tactile feedback can be met. The working principle of these devices is based on bone conduction technology, which transmits sound signals directly to the user's skull through the vibration of the vibrator, thereby transmitting sound to the inner ear, allowing the user to hear the audio signal without occupying the ear canal.

[0158] The dual-actuator actuator of the lever-type spring of the present invention can be applied to various terminal devices such as AR glasses, VR glasses, smart phones, touch screens, gaming devices, and wearable devices to enhance the user experience of audio and touch.

[0159] For example, in bone conduction headphones, the vibrator is set inside the headphone shell, and when the headphones are worn, the vibrator contacts the user's skull. When the vibrator vibrates at the dual resonance peak frequency, the vibration is transmitted to the bones through a scissor-type or lever-type force relationship. The dual resonance peak characteristic of the vibrator ensures that sound signals of different frequencies can be effectively transmitted, thereby improving the clarity and realism of the audio. In addition, the vibrator of bone conduction headphones is usually designed to fit tightly against the bone behind the ear or the temple, transmitting audio through an optimized vibration frequency and reducing the possibility of sound leakage. This design is very suitable for outdoor applications or applications that require environmental awareness, such as sports, cycling, and driving.

[0160] Since the frequency response range of the vibrator covers a wide frequency range from bass to treble, the present invention can provide clearer and more stable sound transmission effects in audio transmission devices; in tactile feedback devices, it can provide users with multi-level tactile feedback. Especially in VR / AR environments, this enhancement of tactile realism significantly improves the user's immersive experience.

[0161] The dual-actuator actuator with a lever-type spring can be further applied to touch screens, smart cockpits, gaming devices, medical equipment, game controllers, touch-sensitive devices, screen sound generators, in-vehicle tactile feedback devices, massage equipment, and tactile feedback network interconnection devices. The core of tactile feedback devices lies in providing precise vibration feedback through vibrators, giving users a more realistic tactile experience during interaction.

[0162] These devices require not only multi-band vibration feedback but also miniaturization, high precision, and long-term stability. Through the innovative dual-resonance peak structure and multiple magnetic domain design of this invention, the vibrator can deliver outstanding performance in these diverse application scenarios.

[0163] In touch-screen devices, the vibrator of the present invention can provide users with more realistic tactile feedback, accurately simulating changes in different materials or touch sensations. In smart cockpits, the vibrator can provide drivers or passengers with tactile feedback of different road conditions. In gaming devices, particularly game controllers, steering wheels, and pedals, the vibrator of the present invention can provide players with a rich tactile feedback experience through its low- and high-frequency resonance characteristics. Furthermore, the application of the present invention in medical devices can provide more sensitive tactile feedback, for example, improving the realism and precision of operations in virtual surgical simulators.

[0164] According to another embodiment, the vibrator of the present invention is used in bone conduction audio equipment to achieve bone conduction transmission of sound signals. For example, in the application of a bone conduction smart bracelet, the vibrator is embedded in the bracelet's strap. When the bracelet contacts the wearer's wrist bones, the vibrations are transmitted through the bones to the auditory system, thereby achieving covert transmission of audio signals. This design is particularly suitable for military or security scenarios, allowing users to clearly receive audio information in noisy environments while keeping their ear canals open to pay attention to their surroundings.

[0165] According to another embodiment, the vibrator of the present invention is applied to a tactile feedback device to realize a vibration feedback function. For example, in an in-vehicle tactile feedback system, the vibrator is embedded in the driver's seat or steering wheel. When the vehicle encounters a bumpy road or an emergency while driving, the vibrator generates corresponding vibration feedback to alert the driver. In an intelligent massage device, the vibrator can be used to provide vibration massage at different frequencies to relieve muscle fatigue and soreness. In particular, through a dual-resonance peak structure, high-frequency vibration can be used to relax muscles while low-frequency vibration can be used for deep massage, thereby enhancing the massage effect.

[0166] These applications expand the present invention's diverse applications in bone conduction audio devices and tactile feedback devices. Through rational structural design and magnetic force control, the present invention's lever-type spring-type dual-actuator actuator can adapt to a variety of complex applications, providing a highly efficient solution for audio transmission and vibration feedback.

[0167] For example, in a game controller, a vibrator is installed inside the controller. When the game generates specific events (such as collisions or explosions), the vibrator vibrates at different frequencies. Through a dual-resonance peak structure, high-frequency vibrations can be used to simulate the impact of explosions, while low-frequency vibrations can be used to simulate ground vibrations, giving users a more immersive experience. In smart cockpit applications, the vibrator can be installed in the seat. When the vehicle brakes suddenly or the road is uneven, the vibrator vibrates to alert the driver, simulating actual road feel feedback and enhancing the driving experience.

[0168] According to another embodiment, the vibrator in the tactile feedback device has an adjustable dual-resonance peak frequency to accommodate different types of vibration feedback needs. For example, in medical rehabilitation equipment, the vibrator's frequency can be adjusted to the vibration range that the user is comfortable with, providing a gentle yet effective massage vibration. Preferably, the control system adjusts the vibrator's electromagnetic field to achieve dynamic vibration frequency adjustment to suit different user needs.

[0169] The present invention has specific applications in audio devices and tactile feedback devices. For example, bone conduction headphones utilize the characteristics of the dual-actuator actuator to transmit sound signals to the auditory system through the bones, thus avoiding the closure of the ear canal. In tactile feedback devices such as game controllers or smart cockpits, the dual-resonance peak characteristics provide high-precision vibration feedback, achieving a more immersive user experience.

[0170] These applications expand the present invention's diverse applications in bone conduction audio devices and tactile feedback devices. Through rational structural design and magnetic force control, the present invention's lever-type spring-type dual-actuator actuator can adapt to a variety of complex applications, providing a highly efficient solution for audio transmission and vibration feedback.

[0171] The present invention has specific applications in audio devices and tactile feedback devices. For example, bone conduction headphones utilize the characteristics of the dual-actuator actuator to transmit sound signals to the auditory system through the bones, thus avoiding the closure of the ear canal. In tactile feedback devices such as game controllers or smart cockpits, the dual-resonance peak characteristics provide high-precision vibration feedback, achieving a more immersive user experience.

[0172] The dual-actuator actuator of the lever-type spring of the present invention achieves a wide-band, high-sensitivity vibration response through a scissor-type or lever-type force relationship, a specific magnet and coil design, and optimization of electromagnetic action, and can adapt to a variety of application scenarios.

[0173] The dual-actuator actuator of the lever-type spring of the present invention achieves a wide-band, high-sensitivity vibration response through a scissor-type or lever-type force relationship, a specific magnet and coil design, and optimization of electromagnetic action, and can adapt to a variety of application scenarios.

[0174] In summary, this invention optimizes the magnetic domain configuration of the actuator assembly, expands the magnetic field, and precisely controls the frequency response range, resulting in a highly adaptable dual-actuator actuator solution for broad application in audio and tactile feedback. Through its innovative design of multi-band resonance and efficient electromagnetic field, this vibrator has broad potential for improving user experience and device performance.

[0175] The principle of the present invention is to use the shrapnel 1 to cause bone resonance at a certain vibration frequency, thereby achieving the effect of listening and converting the audio signal into mechanical vibration. The vibrator of the earphones usually directly contacts the user's skull, and the mechanical vibration generated by the vibrator is transmitted to the skull through the contact surface. The skull transmits the mechanical vibration to the inner ear, directly affecting the fluid in the cochlea, bypassing the outer ear and middle ear. The mechanical vibration generated by bone conduction causes the fluid in the cochlea to vibrate, causing the hair cells on the basilar membrane to vibrate. The hair cells convert these mechanical vibrations into electrical signals. These converted electrical signals are transmitted to the auditory cortex of the brain through the auditory nerve, where they are decoded and processed and ultimately recognized as sound.

[0176] Example 12

[0177] like Figure 17-24 As shown, a series of simulations and physical tests were performed on the double-resonance peak oscillator of the lever-type spring of the present invention in Abaqus.

[0178] like Figure 21 and 23 As shown in the figure, the two resonance peaks can be adjusted to obtain different bandwidths. The figure shows that the first peak is at 480 and the second peak is at 2344. The actual machine test found that the first peak appears at 649 and the second peak appears at around 2000. This is related to the actual assembly method and material. If the Young's modulus of the actual shrapnel is high, the first peak will appear later. Figure 22 and 24 As shown in the figure, the first peak is at 448 and the second peak is at 3950. In the actual machine test, the first peak appears at 282 and the second peak appears at around 3500. These examples are intended to explain that we can customize the range of the desired double peak appearance (20-20KHz) according to our needs, not just limited to a certain area.

[0179] Example 13

[0180] like Figure 25 As shown, in an embodiment of the present invention, in an embodiment of the present invention, a double-moving sub-actuator actuator of a lever-type spring piece includes: a spring piece 1 (a double-sided spring piece), a fixed peripheral support structure 2, a moving sub-assembly 3 and a moving sub-assembly 4; viewed from the center outward, the moving sub-assembly 3 is inside, the moving sub-assembly 4 is outside, and the peripheral support structure 2 is fixedly connected to the outer ring of the spring piece 1 to form an integral support structure; the moving sub-assembly 3, the moving sub-assembly 4, and the fixed peripheral support structure 2 are fixedly connected to at least three locations of the spring piece 1, and gaps are left between the moving sub-assembly 3 and the moving sub-assembly 4, as well as between the moving sub-assembly 4 and the peripheral support structure 2, so that the moving sub-assembly can vibrate;

[0181] The first mover assembly 3 is a magnet assembly, and the second mover assembly 4 is a coil assembly. The magnet assembly includes a magnet 7, a first guide disk 10, and a second guide disk 11. The upper portion of the magnet 7 is fixedly connected to the first guide disk 10, and the lower portion is fixedly connected to the second guide disk 11, forming a structure that concentrates the magnetic field. The design of the upper and lower symmetrical guide disks effectively concentrates the magnetic lines of force in the vibration area, reducing magnetic field leakage and improving electromagnetic efficiency.

[0182] The coil assembly is formed by combining a yoke 12 with symmetrically arranged coils 13 and a magnetic ring 14. The yoke 12 is fixed to the inner cylinder 6, which is fixedly connected to the inner cylinder connection point 1D of the spring 1, forming a closed electromagnetic circuit. When current passes through the coil, the yoke 12 concentrates the magnetic field, and the magnetic ring 14 ensures that the magnetic field is evenly distributed between the mover assembly and the magnet assembly. In this way, mover assembly 1 3 and mover assembly 2 4 can vibrate along a specific direction of the spring 1 under the drive of the electromagnetic force, ensuring that the vibrator achieves dual resonance peaks within the set frequency range.

[0183] An intermediate support rod 15 is fixedly provided in the middle position of the shrapnel 1. The purpose of the intermediate support rod 15 is to transmit force to the earphone head or other actuating body by connecting with the middle part. Then the position where the vibrator outputs force is the middle part. This output method can effectively reduce the total loss of force in the transmission process, and more efficiently transmit force to the earphone head to generate greater thrust. It is a very meaningful method and is suitable for a variety of application scenarios.

[0184] The purpose of the middle support rod 15 is to transmit force to the earphone headphone through its connection to the middle portion. Therefore, the vibrator's output force is located in the middle portion. In this case, the peripheral portion at the endpoint force point O and the middle force point B are connected to the mover assembly 1 3 and mover assembly 2 4, respectively. The electromagnetic forces at O ​​and B, which are equal in magnitude and opposite in direction, form a lever relationship with the force applied to the middle portion at A.

[0185] Example 14

[0186] like Figure 26-32 Double-acting oscillator vibration model, lever type

[0187] 1) Single-sided (double-spring dome) vibrator

[0188] A single-sided (double-spring) vibrator has a lever-type double-spring transmission limb on only one side of the vibrator along the Z axis. The lever-type double-spring transmission limb is equivalent to two springs, arranged in sequence from the outer cylinder toward the center: a transmission limb corresponding to spring 1, and a transmission limb corresponding to spring 2. A bone conduction vibrator design with a lever-type double-spring transmission limb connected to a dual-movement element has two sets of movement components, with two springs connecting each set.

[0189] like Figure 26As shown in the figure, it is assumed that spring 1 (corresponding to the OB segment of the vibration transmitting limb, with a corresponding spring constant of ks1) is connected to the assumed movable component 1, and spring 2 (corresponding to the BA segment of the vibration transmitting limb, with a corresponding spring constant of ks2) is connected to the assumed movable component 2. Spring 1 + movable component 1, and spring 2 + movable component 2, form two independent vibration subsystems, which are connected to the outer cylinder of the vibrator in series.

[0190] Assume that from the outer cylinder radially toward the center, there are rotator assembly 1 and rotator assembly 2. The corresponding double spring shrapnel parts are spring 1 and spring 2. Assume that the mass of rotator assembly 1 (rotator 1) is m r1 , rotator2 mass m r2 The spring constant of the spring 1 connected to the movable component 1 is k s1 The spring constant of the spring 2 connected to the movable component 2 is k s2 In addition, assuming that the mass of the oscillator shell is m shell =m 外筒sleeve +m 弹簧片spring .

[0191] For simplicity, it is assumed that the damping of the spring is very small, close to zero. Assume that the electromagnetic force between the mover assembly 1 (magnet) and the mover assembly 2 (coil) interacts with each other, and the forces on the mover assembly 1 and the mover assembly 2 are F and F, respectively. r1 and F r2 , according to Newton's third law, F r1 =-F r2

[0192] The vibration model of a single-sided (double-spring shrapnel) oscillator can be Figures 27-28 describe:

[0193] 2) Double-sided (double-spring) vibrator

[0194] A double-sided (double-spring) vibrator has a lever-type double-spring transmission limb on each side of the vibrator along the Z axis. The lever-type double-spring transmission limb is equivalent to two springs, arranged in sequence from the outer cylinder toward the center, with a transmission limb group corresponding to spring 1 and a transmission limb group corresponding to spring 2. A bone conduction vibrator design with a lever-type double-spring transmission limb connected to two actuators means there are two sets of actuator assemblies, with two springs connecting each set.

[0195] like Figure 26 As shown, it is assumed that spring 1 (corresponding to the OB segment of the vibration transmitting limb, the corresponding stiffness coefficient is k s1 ) is connected to the movable component 1, spring 2 (corresponding to the BA segment of the vibration transmitting limb, the corresponding stiffness coefficient is k s2) is assumed to be connected to the mover assembly 2. Spring 1 + mover 1, and spring 2 + mover 2, constitute two independent vibration subsystems, and the two vibration subsystems are connected to the outer cylinder of the vibrator in series.

[0196] like Figures 29-30 As shown, it is assumed that from the radial direction of the outer cylinder to the center of the circle, there are rotator assembly 1 and rotator assembly 2. The corresponding double spring shrapnel parts are spring 1 and spring 2. Assume that the mass of rotator assembly 1 (rotator 1) is m r1 , rotator2 mass m r2 The spring stiffness coefficient of the springs on both sides of the mover assembly 1 is k s1,1 and k s1,2 The spring stiffness coefficient of the springs on both sides of the mover assembly 2 is k s2,1 and k s2,2 The stiffness coefficient of the moving component 1 is k r1 =k s1,1 +k s1,2 , the stiffness coefficient of the movable component 2 is k r2 =k s2,1 +k s2,2 In addition, the total shell mass m shell =m 外筒sleeve +m 弹簧片spring .

[0197] For simplicity, it is assumed that the damping of the spring is very small, close to zero. Assume that the electromagnetic force between the mover assembly 1 and the mover assembly 2 interacts with each other, and the forces on the mover 1 and mover 2 are F r1 and F r2 , according to Newton's third law, F r1 =-F r2

[0198] Advantages of double-acting oscillators:

[0199] Single-moving oscillator -> single-vibration subsystem, the system has only one resonant frequency point, and its frequency response curve is as follows Figure 31 .

[0200] f low is the low-frequency cutoff frequency of the frequency response curve, f high It is the high frequency cutoff frequency of the frequency response curve, and the bandwidth is BW=f high -f low From the frequency response curve, we can see that the bandwidth of a single moving oscillator is limited to the vicinity of the resonant frequency.

[0201] Double-acting oscillator->double-vibration subsystem, the system has two resonant frequency points, and its frequency response curve is as follows Figure 32 :

[0202] The dotted lines are the frequency response curves of oscillator subsystem 1 and oscillator subsystem 2 respectively; the solid line is the frequency response curve of the dual oscillator subsystem.

[0203] f low is the low-frequency cutoff frequency of the frequency response curve, f high It is the high frequency cutoff frequency of the frequency response curve, and the bandwidth is BW=f high -f low As can be seen from the frequency response curve, the dual-moving oscillator greatly broadens the system's bandwidth. Because the dual-moving oscillator has two resonant frequencies, its bandwidth is much wider than that of a single-moving oscillator with a single resonant frequency.

[0204] Modeling and solving of the vibration system of double-moving oscillators:

[0205] According to the above system modeling (see the derivation in Chapter 3, let c1 = c2 = c3 = c4 = 0, and let k1 = k4 = 0), the vibration equation of the double oscillator can be obtained as follows (see Chapter 4):

[0206] Dynamic equations based on force analysis of the vibration system:

[0207]

[0208] The general formula obtained by sorting out the above formula is as follows:

[0209]

[0210] in:

[0211]

[0212]

[0213]

[0214]

[0215] make

[0216] where f r is the electromagnetic interaction force between the mover components.

[0217] The vibration equation of the double-moving oscillator is converted into the frequency domain, and the equation for solving its resonant frequency is:

[0218] m1m2m3*ω 4 -(k2m2m3+(k2+k3)m1m3+k3m1m2)*ω 2 +k2k3(m1+m2+m3)=0

[0219] or:

[0220]

[0221] or:

[0222] m1m2m3*ω 4 -((m1+m2)k2m3+(m2+m3)k3m1)*ω 2 +k2k3(m1+m2+m3)=0

[0223] or:

[0224]

[0225] The above is a quadratic equation with two solutions:

[0226]

[0227] In other form:

[0228]

[0229] or:

[0230]

[0231] The transformations are:

[0232]

[0233] The target resonant frequency is ω t1 and ω t2 , then to select the spring coefficients k2 and k3, you can solve them according to the following equation.

[0234] For a quadratic equation, assume there are two roots, namely ω t1 and ω t2 :

[0235] m1m2m3*ω 4 -((m1+m2)k2m3+(m2+m3)k3m1)*ω 2 +k2k3(m1+m2+m3)=0

[0236]

[0237] Thus:

[0238]

[0239] Expressing k3 in terms of k2 gives:

[0240]

[0241] Solving the above quadratic equation, we can find the stiffness coefficient k2:

[0242]

[0243] Substitute into the formula again and find k3

[0244]

[0245] The above shows and describes the basic principles and main features of the present invention as well as the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary examples, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the present invention should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0246] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A double-actuator actuator with a lever-type spring, characterized in that: It includes a spring piece, a peripheral support structure, a mover assembly 1 and a mover assembly 2; The spring piece includes a central portion, a peripheral portion and a connecting rod. The peripheral portion of the spring piece is fixedly connected to the peripheral support structure. The connecting rod includes an end force point A, the end force point A is located at the central portion of the spring piece, an intermediate force point B and an end force point O. The end force point O is located at the peripheral portion of the spring piece. The first movable component is connected to the end force point A or O, and the second movable component is connected to the intermediate force point B. The double movable component structure generates two or more resonance peaks. Electromagnetic interaction forces of equal magnitude and opposite direction are generated between the mover assembly 1 and the mover assembly 2. Through a lever-type force relationship, the center part at the endpoint force point A or the peripheral part at O ​​is pried up to output the force externally. This mechanical relationship forms a lever-type force relationship, and the force at the center part at the endpoint force point A or the peripheral part at O ​​is increased, thereby improving the actuation performance of the actuator.

2. The double-actuator actuator of the lever-type spring according to claim 1, characterized in that: If the dual-motor actuator transmits force to the actuator body through the peripheral part or the peripheral support structure, then the position where the vibrator outputs force is the peripheral part or the peripheral support structure. At this time, the center part at the end force point A and the middle force point B are connected to the mover component one and the mover component two respectively. At this time, the electromagnetic forces of the same magnitude and opposite directions at A and B form a lever relationship with the force of the peripheral part at O.

3. The double-actuator actuator of the lever-type spring according to claim 1, characterized in that: If the dual-actuator actuator transmits force to the actuator body through the middle part, then the position where the vibrator outputs force is the middle part. At this time, the peripheral part at the end force point O and the middle force point B are connected to the actuator component one and the actuator component two respectively. At this time, the electromagnetic forces of the same magnitude and opposite directions at O ​​and B form a lever relationship with the force of the middle part at A.

4. The double-actuator actuator of the lever-type spring according to claim 1, characterized in that: The connection points A, B and O are located on the extension line to form a lever-type force relationship, ensuring the movement relationship between the spring, the mover assembly 1, the mover assembly 2 and the peripheral support structure, so as to ensure that the vibration moves in a lever-type motion manner.

5. The double-actuator actuator of the lever-type spring according to claim 1, characterized in that: Looking outward from the center, the movable sub-assembly 1 is inside and the movable sub-assembly 2 is outside, or the movable sub-assembly 1 is outside and the movable sub-assembly 2 is inside. The peripheral support structure is fixedly connected to the outer ring of the spring to form an overall support structure; the movable sub-assembly 1, the movable sub-assembly 2, and the fixed peripheral support structure are fixedly connected to at least three positions of the spring, and gaps are left between the movable sub-assembly 1 and the movable sub-assembly 2, as well as between the movable sub-assembly 2 and the peripheral support structure, so that the movable sub-assembly can vibrate.

6. The double-actuator actuator of the lever-type spring according to claim 1, characterized in that: The structural relationship between the mover assembly 1 and the mover assembly 2 adopts any of the following forms: Method 1 is the magnetic coil parallel type: the mover assembly 1 is the magnet assembly, and the mover assembly 2 is the coil assembly; The second method is the coil-magnetic parallel type: the first movable component is the coil component, and the second movable component is the magnet component; The third method is the parallel connection of the moving iron and moving magnetic coil: the first moving component is the iron core component, and the second moving component is the magnetic coil component; Method four is the moving iron and moving coil magnet parallel type: the moving component one is the iron core component, and the moving component two is the coil magnet component.

7. The dual-mover actuator of the lever-type spring according to claim 6, wherein the first mover component is a magnet component, and the second mover component is a coil component, the magnet component includes a magnet fixedly connected to a conductive disk up and down; the coil component includes a yoke, symmetrically distributed coils and a magnetic conductive ring, forming a closed electromagnetic circuit to enhance the electromagnetic effect.

8. The double-actuator actuator of the lever-type spring according to claim 6, characterized in that: The first movable component is a coil component, and the second movable component is a magnet component. The coil component includes symmetrically arranged coils, and the currents in the coils are in opposite directions to form a symmetrical electromagnetic field to enhance the stability of the vibration.

9. The double-actuator actuator of the lever-type spring according to claim 6, characterized in that: The first movable component is the iron core, and the second movable component is the magnet coil component. The magnet coil component includes symmetrically distributed magnets and magnetic rings. The coil is attached to the yoke by gluing or other means to form a closed electromagnetic circuit. We call this method the moving iron and moving coil magnetic type.

10. The double-actuator actuator of the lever-type spring according to claim 6, characterized in that: The first movable component is an iron core, and the second movable component is a magnet coil component. The magnet coil component includes symmetrically distributed coils and magnetic rings. The magnet is attached to the yoke by gluing or other means to form a closed electromagnetic circuit. We call this method the moving iron and moving magnet coil type.

11. The double-actuator actuator of the lever-type spring according to claim 1, characterized in that: The spring piece includes a double-sided or single-sided structure, wherein the peripheral support structure can be a cylindrical support member or a fixed support member in other forms. The peripheral support structure encloses the spring piece and the movable subassembly therein to reduce external environmental interference and ensure stable operation of the vibrator.

12. The dual-actuator actuator of the lever-type spring sheet according to claim 1, wherein the spring sheet adopts a single-layer or multi-layer stacking structure to form a multi-layer spring sheet to improve vibration efficiency and intensity, making the vibration response effect more stable in the double resonance peak state.

13. The double-actuator actuator of the lever-type spring according to claim 1, characterized in that: The peripheral portion of the shrapnel is fixedly connected to the peripheral support structure and fixed by gluing, welding or riveting to improve the rigidity of the overall structure and ensure that the equipment remains stable during long-term vibration.

14. The double-actuator actuator of the lever-type spring according to claim 1, characterized in that: It includes at least one magnetic action domain, which refers to the spatial region where magnetic interaction occurs under the action of the electromagnetic field, including the area where the attraction or repulsion between the permanent magnet and the magnetic conductor occurs.

15. The double-actuator actuator of the lever-type spring according to claim 1, characterized in that: The frequency response range is 20-20,000 Hz, with significant resonance peaks at both low and high frequencies, meeting the multi-band requirements of bone conduction audio devices and tactile feedback devices.

16. The double-actuator actuator of the lever-type spring according to claim 1, characterized in that: The two spring coefficients k2 and k3 of the spring of the double-actuator actuator of the lever-type spring are related to the mass of the relevant components in the actuator and the two target resonant frequencies of the actuator.

17. The double-actuator actuator of the lever-type spring according to claim 16, characterized in that: The relationship between the two spring coefficients k2 and k3 of the lever-type spring-type double-actuator actuator, the mass of the relevant components in the actuator, and the two target resonant frequencies of the actuator is as follows: in, m1=m shell =m 外筒sleeve +m springs ,m2=m r1 ,m3=m r2 ,k s1 =k2,k r2 =k3, The physical meanings of the variables in the above formula are explained as follows: Connecting the support rod OB segment, the corresponding stiffness coefficient is k s1 , connect the movable component 1, connect the support rod BA section, the corresponding stiffness coefficient is k s2 , connected to form the second movable subassembly; connecting the support rod OB segment and the movable subassembly, and connecting the support rod BA segment and the movable subassembly, forming two independent vibration subsystems, the two vibration subsystems are connected to the peripheral support structure in series, and the stiffness coefficient of the connecting support rod BA segment on both sides of the first movable subassembly is k s1,1 and k s1,2 The stiffness coefficient of the connecting rod OB section on both sides of the second movable subassembly is k s2,1 and k s2,2 , the stiffness coefficient of the movable component is k r1 =k s1,1 +k s1,2 , the stiffness coefficient of the second moving component is k r2 =k s2,1 +k s2,2 , total shell mass m shell =m 外筒sleeve +m springs， For the sake of simplicity, it is assumed that the damping of the spring is very small, close to zero, and it is assumed that the electromagnetic force between the mover assembly 1 and the mover assembly 2 interacts with each other. The forces on the mover assembly 1 and the mover assembly 2 are F r1 and F r2 , according to Newton's third law, F r1 =-F r2 , m1=m shell =m 外筒sleeve +m springs， m2=m r1 m3=m r2 k s1＝ k2 k r2 =k3。 18. An application of a double-actuator actuator of a lever-type spring as claimed in any one of claims 1 to 17, characterized in that: Suitable for bone conduction headphones, bone conduction glasses, wired headphones, wireless headphones, AR glasses, VR glasses, smart watches, smart bracelets, head-mounted devices, wearable devices, smart phones, game controllers, gaming headsets, gaming steering wheels, gaming pedals, mice, keyboards, touch screens, electrical control panels, touch devices, screen sound devices, vehicle-mounted tactile feedback devices, smart cockpits, gaming chairs, massage chairs, massagers, tactile feedback vests, tactile feedback gloves, tactile feedback belts, tactile feedback leg devices, assistive hearing aids, sleep aids or tactile feedback network interconnection devices.

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