A moving coil microphone and device

Abstract

This application discloses a dynamic microphone core and device. The dynamic microphone core includes a housing, a magnetic field supply component, a diaphragm assembly, and a limiting component. The diaphragm assembly is configured in conjunction with the magnetic field supply component to achieve acoustic-to-electrical conversion. The housing has a groove. The magnetic field supply component is disposed within the groove and is spaced from the inner wall of the groove. The limiting component is disposed on the diaphragm assembly and located within the gap between the magnetic field supply component and the groove. The limiting component is used to suppress vibration fluctuations of the diaphragm assembly. By setting the limiting component between the groove and the magnetic field supply component, the limiting component is connected to the diaphragm assembly and can adaptively adjust according to the vibration amplitude and frequency of the diaphragm assembly, shortening the decay time of excess vibration, effectively suppressing excess diaphragm vibration, and avoiding noise generated by non-target vibration. Thus, it can simultaneously achieve a clean and clear sound effect while maintaining the response sensitivity of the diaphragm assembly and the stability of the voice coil, meeting the needs of high-end audio applications.

Description

Technical Field

[0001] This application relates to the field of electroacoustic conversion equipment technology, and in particular to a dynamic microphone core and device. Background Technology

[0002] The dynamic microphone core is the core component that converts sound into electrical signals by vibrating in a magnetic field through the cooperation of the voice coil and the diaphragm. There is still room for improvement in the diaphragm structure design of related technologies. This is mainly because if the diaphragm is designed to be too heavy and lacks rigidity, it will result in low vibration sensitivity, poor high-frequency response, and a muffled, unclear sound. Conversely, if the diaphragm is designed to be too light, it is prone to generating excessive vibrations and introducing noise. Therefore, the diaphragm structures in related technologies are difficult to meet the requirements of scenarios with high sound quality. Utility Model Content

[0003] This application proposes a dynamic microphone core to effectively solve the technical problem that the diaphragm response sensitivity and voice coil working stability cannot be simultaneously achieved in related technologies.

[0004] This application also proposes a device including the aforementioned dynamic microphone core.

[0005] A first aspect of this application provides a dynamic microphone core, including: a housing, a magnetic field providing component, a diaphragm assembly, and a limiting component;

[0006] The diaphragm assembly is configured in conjunction with the magnetic field providing assembly and is used to achieve acoustic-to-electric conversion.

[0007] The housing has a groove;

[0008] The magnetic field providing component is disposed within the groove and is spaced apart from the inner wall of the groove;

[0009] The limiting component is disposed on the diaphragm assembly and located within the gap between the magnetic field providing component and the groove, and the limiting component is used to suppress the vibration fluctuation of the diaphragm assembly.

[0010] Furthermore, the limiting component is a damping ring, which is located within the groove and surrounds the magnetic field to provide the outer periphery of the component.

[0011] Furthermore, at least a portion of the damping ring is made of an elastic material.

[0012] Furthermore, the limiting component is connected to the diaphragm assembly by adhesive bonding.

[0013] Furthermore, the housing is provided with a U-shaped iron component, the groove is formed on the U-shaped iron component, the magnetic field providing component is disposed on the U-shaped iron component and located in the groove, and the limiting component is located between the groove and the magnetic field providing component.

[0014] Furthermore, the magnetic field providing component includes a magnet component and a magnetically conductive component, the magnet component being located within the groove, and the magnetically conductive component being connected to the side surface of the magnet component closest to the diaphragm assembly.

[0015] Furthermore, the magnet component includes a plurality of symmetrically arranged permanent magnets.

[0016] Furthermore, the magnet component includes a magnetic yoke and a magnetic pole structure, the permanent magnet is configured as a fan-shaped structure, the permanent magnet is uniformly distributed circumferentially within the magnetic yoke, and the magnetic pole structure is configured in conjunction with the permanent magnet and is used to guide the direction of the magnetic field.

[0017] Furthermore, the permanent magnet is made of neodymium iron boron material;

[0018] And / or, the magnetic pole structure is made of a soft magnetic material.

[0019] As can be seen from the above technical solutions, the embodiments of this application have at least the following beneficial effects: by setting a limiting component between the groove and the magnetic field providing component, the limiting component is connected to the diaphragm component and can be adaptively adjusted according to the vibration amplitude and frequency of the diaphragm component, so that the decay time of the excess vibration is shortened, the excess vibration of the diaphragm is effectively suppressed, and the noise generated by non-target vibration is avoided. Thus, it is possible to achieve a clean and clear sound effect while simultaneously improving the response sensitivity of the diaphragm component and the stability of the voice coil, thereby meeting the needs of high-end audio applications.

[0020] A second aspect of this application provides a device including a dynamic microphone core as described in the first aspect of this application.

[0021] It is easy to understand that the device in the second aspect embodiment of this application has the same technical effects as the dynamic microphone in the first aspect embodiment, and therefore will not be described again.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a cross-sectional view of a dynamic microphone core provided in one embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure of a dynamic microphone core provided in one embodiment of this application;

[0026] Figure 3 An exploded view of a dynamic microphone core provided in one embodiment of this application;

[0027] Figure 4 This is a schematic diagram of a diaphragm assembly and a limiting component provided in one embodiment of this application.

[0028] Figure label:

[0029] 100. Shell;

[0030] 200. Magnetic field providing component; 210. Magnet component; 220. Magnetic guiding component;

[0031] 300. U-shaped iron component; 310. Groove;

[0032] 400. Diaphragm assembly;

[0033] 500. Limiting components. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] See Figures 1 to 4 As shown, an embodiment of the first aspect of this application discloses a dynamic microphone core, including a housing 100, a magnetic field providing component 200, a diaphragm component 400, and a limiting component 500.

[0036] The diaphragm assembly 400 is configured in conjunction with the magnetic field providing assembly 200 to achieve acoustic-electric conversion; the housing 100 has a groove 310; the magnetic field providing assembly 200 is disposed in the groove 310 and there is a gap between it and the inner wall of the groove 310; the limiting member 500 is disposed on the diaphragm assembly 400 and located in the gap between the magnetic field providing assembly 200 and the groove 310, and the limiting member 500 is used to suppress the vibration fluctuation of the diaphragm assembly 400.

[0037] In the embodiments of this application, a limiting component 500 is provided between the groove 310 and the magnetic field providing component 200. The limiting component 500 is connected to the diaphragm assembly 400 and can be adaptively adjusted according to the vibration amplitude and frequency of the diaphragm assembly 400. This shortens the decay time of excess vibration, effectively suppresses excess vibration of the diaphragm, and avoids noise generated by non-target vibration. Thus, it can simultaneously achieve the technical effect of clean and clear sound while maintaining the response sensitivity of the diaphragm assembly 400 and the stability of the voice coil, meeting the needs of high-end audio applications.

[0038] Understandably, exemplarily, the diaphragm assembly 400 includes a diaphragm and a voice coil. The magnetic field providing assembly 200 provides a magnetic field. The diaphragm responds to external sound and drives the voice coil to move in the magnetic field, thereby generating an electrical signal corresponding to the sound through electromagnetic induction, achieving sound-to-electric conversion. In some embodiments, the diaphragm is a key sound-generating component of the dynamic microphone core. When external sound causes air vibration, the diaphragm vibrates accordingly, driving the voice coil to move in the magnetic field, converting sound energy into mechanical energy, and then into electrical energy through electromagnetic induction. It is the starting point of sound-to-electric conversion, and its material, thickness, etc., affect the sensitivity and sound quality of sound pickup and conversion.

[0039] In some embodiments, the housing 100 has a groove 310, and the magnetic field providing component 200 is disposed in the groove 310, so that the diaphragm assembly 400 realizes sound-to-electric conversion based on the magnetic field provided by the magnetic field providing component 200 when vibrating. On this basis, a limiting component 500 is provided on the diaphragm assembly 400 and placed between the groove 310 and the magnetic field providing component 200. The limiting component 500 can adaptively adjust between the groove 310 and the magnetic field providing component 200 according to the vibration amplitude and frequency of the diaphragm, effectively suppressing the excessive vibration of the diaphragm and ensuring the noise suppression effect.

[0040] Furthermore, the limiting component 500 is used to suppress the vibration fluctuations of the diaphragm assembly 400, which can be understood as suppressing the excessive vibrations of the diaphragm assembly 400, including but not limited to low-frequency resonance or high-frequency flutter, so that the dynamic microphone core of this application embodiment can be applied to professional audio equipment with high sound quality requirements.

[0041] In some embodiments, the limiting component 500 can be optimized by adjusting its structure, hardness and thickness through an acoustic testing system, thereby improving its performance in adaptively adjusting according to the vibration amplitude and frequency of the diaphragm assembly 400, shortening the decay time of excess vibration and improving noise suppression.

[0042] The following will combine Figures 1 to 4 The dynamic microphone core disclosed in the embodiments of this application will be explained and described in detail.

[0043] It should be understood that in order for the limiting component 500 to have better adaptive adjustment performance based on the vibration amplitude and frequency of the diaphragm assembly 400, the structural design of the limiting component 500 is the key to achieving the above functions.

[0044] In this regard, in some embodiments of this application, reference is made to Figure 1 and Figure 4 The limiting component 500 is a damping ring, located within the groove 310 and surrounding the magnetic field to provide the outer periphery of the component 200. It can be understood that, on the one hand, setting the limiting component 500 as a ring structure allows it to better conform to the vibration amplitude and frequency characteristics of the diaphragm, improving its adaptive performance; on the other hand, setting the limiting component 500 as a damping structure reduces the impact of excessive vibration on the acoustic-electric conversion, further purifying the sound output, enhancing the clean and pure sound characteristics, and also to some extent reducing the impact of external vibration on the dynamic microphone core, thus improving sound quality.

[0045] In some embodiments, the center lines of the damping ring, diaphragm assembly 400, magnetic field providing assembly 200, and groove 310 coincide. This uniformly purifies the sound output and enhances the clean, unadulterated sound characteristics. Specifically, the diaphragm assembly 400 and magnetic field providing assembly 200 are configured as rotating structures, and the structural components forming the groove 310 are also configured as rotating structures, thereby facilitating the alignment of the center lines to achieve better sound quality enhancement.

[0046] In some embodiments, at least a portion of the damping ring is made of an elastic material. It is understood that the damping effect is achieved through material properties, thereby meeting functional requirements while optimizing the structural design. The damping ring may be made of elastic materials, including but not limited to silicone rubber, with optimized hardness and thickness to shorten the decay time of unwanted vibrations and improve noise suppression.

[0047] Furthermore, the limiting component 500 is connected to the diaphragm assembly 400 by adhesive bonding. Understandably, precisely attaching the elastic damping ring to the diaphragm assembly 400 using specialized adhesive not only facilitates assembly but also minimizes the impact on the diaphragm assembly 400's functionality. This precise design and assembly of each component effectively enhances noise suppression.

[0048] In some embodiments of this application, reference is made to Figure 1 and Figure 3The housing 100 contains a U-shaped iron component 300, with a groove 310 formed on the U-shaped iron component 300. A magnetic field providing component 200 is disposed on the U-shaped iron component 300 and located within the groove 310. A limiting component 500 is located between the groove 310 and the magnetic field providing component 200. It is understood that the U-shaped iron component 300 is used to cooperate with the magnetic field providing component 200 to form a magnetic circuit system and create a stable magnetic field environment. The U-shaped iron component 300 typically has a groove 310 for accommodating the magnetic field providing component 200; therefore, by limiting the limiting component 500 through this groove 310, the limiting component 500 can effectively suppress excessive vibration of the diaphragm.

[0049] In other embodiments, the groove 310 is formed on the housing 100, the magnetic field providing component 200 is disposed on the U-iron component 300, the U-iron component 300 is located in the groove 310 of the housing 100, and the limiting component 500 is located between the groove 310 and the U-iron component 300. This can also achieve the effect of adaptive adjustment according to the vibration amplitude and frequency of the diaphragm, effectively suppressing the excessive vibration of the diaphragm.

[0050] Exemplarily, in some embodiments, reference is made to Figure 3 The magnetic field providing component 200 includes a magnet component 210 and a magnetic conductive component 220. The magnet component 210 is located in the groove 310, and the magnetic conductive component 220 is connected to the side surface of the magnet component 210 near the diaphragm assembly 400.

[0051] Understandably, the U-shaped iron component 300 provides the magnetic field foundation for the voice coil's movement and influences the magnetic field strength and distribution, ensuring that the voice coil can effectively cut magnetic field lines during vibration, thus achieving electroacoustic conversion. The magnet component 210 provides a stable static magnetic field in the magnetic circuit system and is the core of the system. Working in conjunction with the U-shaped iron component 300 and the magnetic guide component 220, it forms a strong and suitable magnetic field in the air gap region where the voice coil is located. When the voice coil vibrates and cuts magnetic field lines, it generates an electrical signal based on the principle of electromagnetic induction, which is the key magnetic field source for achieving electroacoustic conversion. The magnetic guide component 220 works with the U-shaped iron component 300 and the magnet component 210 to optimize the magnetic circuit, making the magnetic field more concentrated and evenly distributed in the voice coil's working air gap, improving magnetic field utilization, ensuring that the voice coil stably and efficiently cuts magnetic field lines during vibration, and improving the efficiency of electroacoustic conversion and sound quality. Specifically, the magnetic guide component 220 can be a commonly used magnetic guide component such as a washer.

[0052] In related technologies, there is a problem of signal distortion caused by poor magnetic field uniformity due to unreasonable magnetic circuit system design. To address this, in some embodiments of this application, the magnet component 210 includes multiple symmetrically arranged permanent magnets, thereby improving the uniformity of the magnetic field.

[0053] Furthermore, the magnet component 210 includes a yoke and a pole structure. The permanent magnets are arranged in a fan-shaped structure, uniformly distributed circumferentially within the yoke. The pole structure works in conjunction with the permanent magnets to guide the direction of the magnetic field. It can be understood that by using a symmetrical layout of multiple magnets, with multiple fan-shaped permanent magnets uniformly distributed circumferentially within the yoke, and in conjunction with a precision-machined pole structure, the uniformity of the magnetic field within the magnetic gap is significantly improved. A uniform magnetic field environment ensures the stability of the strength at which the voice coil cuts magnetic field lines during vibration, reducing electrical signal distortion caused by magnetic field fluctuations. This guarantees signal purity from the source of sound-to-electrical conversion, effectively avoiding sound distortion and laying the foundation for clean sound output.

[0054] Furthermore, the magnetic field source is provided by the inherent magnetic poles of the permanent magnet, and the magnetic pole structure or magnetic conductive component 220 is used to guide, concentrate or change the direction of the magnetic field so that the magnetic field is distributed as needed, such as a uniform magnetic field, a radiating magnetic field, a rotating magnetic field, etc.

[0055] In some embodiments, the magnetic pole structure and the permanent magnet are combined in ways including, but not limited to, the permanent magnet + magnetic column and the magnetic yoke forming a radial magnetic field, which interacts with the coil to generate vibration and produce sound.

[0056] In some embodiments, the permanent magnet is made of neodymium iron boron material. Using a neodymium iron boron permanent magnet with high magnetic energy product as a magnetic source can ensure the stability of the magnetic field environment.

[0057] In some embodiments, the magnetic pole structure is made of soft magnetic material, and the use of soft magnetic material with high magnetic permeability helps to form an efficient magnetic circuit.

[0058] In one specific embodiment, the magnetic circuit system of this application uses neodymium iron boron permanent magnets, cut into sector-shaped units. Multiple sector-shaped permanent magnets are uniformly distributed and fixed circumferentially within the magnetic yoke using precision positioning fixtures, ensuring that the magnetic field uniformity within the magnetic gaps is within the error range. The magnetic poles are made of soft magnetic materials with high permeability (such as pure iron), which, after precision machining, cooperate with the permanent magnets to form a highly efficient magnetic circuit.

[0059] In some embodiments of this application, to avoid unstable resistance due to rough voice coil winding, a high-precision automated winding process is used to achieve high-density, uniform winding, ensuring the stability of the voice coil resistance and reducing signal loss and fluctuations during electroacoustic conversion. It is understood that a CNC winding machine is used to wind the voice coil, controlling wire diameter tolerance and winding density uniformity. An elastic damping ring is placed between the diaphragm and the microphone housing, and the hardness and thickness of the damping ring are adjusted using an acoustic testing system to shorten the decay time of excess vibrations and improve noise suppression.

[0060] The dynamic microphone core of this application is described in detail below with a specific embodiment. It should be noted that the following embodiment is merely an exemplary description and should not be construed as limiting the embodiments of this application.

[0061] See Figures 1 to 4 As shown, the dynamic microphone core of this embodiment improves magnetic field uniformity, diaphragm response sensitivity, and voice coil working stability through innovative design of the magnetic circuit system, diaphragm, voice coil, and damping structure, effectively suppressing noise and achieving a clean and clear sound effect to meet the needs of high-end audio applications.

[0062] The magnetic circuit system uses high-energy-product neodymium iron boron permanent magnets as the magnetic source. Through a symmetrical multi-magnet layout (such as multiple fan-shaped permanent magnets evenly distributed circumferentially within the yoke) and a precision-machined magnetic pole structure, the uniformity of the magnetic field within the magnetic gap is significantly improved. This uniform magnetic field environment ensures the stability of the voice coil's cutting of magnetic field lines during vibration, reducing electrical signal distortion caused by magnetic field fluctuations. This guarantees signal purity from the source of sound-to-electrical conversion, effectively avoiding sound distortion and laying the foundation for clean sound output.

[0063] The voice coil employs a high-precision automated winding process to achieve high-density, uniform winding, ensuring the stability of the voice coil resistance and reducing signal loss and fluctuations during the electroacoustic conversion process.

[0064] Meanwhile, an adaptive damping structure is added inside the dynamic microphone core, such as an elastic damping ring (made of elastic materials such as silicone rubber, with optimized hardness and thickness) between the diaphragm and the microphone core shell. This damping ring can adaptively adjust according to the vibration amplitude and frequency of the diaphragm, effectively suppressing unnecessary diaphragm vibrations (such as low-frequency resonance or high-frequency flutter), avoiding noise generated by these non-target vibrations, further purifying the sound output, and enhancing the clean and impurity-free characteristics of the sound.

[0065] Through the above structural optimization, the optimization of the magnetic circuit system reduces signal distortion and improves sound purity; the improvement of the voice coil and damping structure suppresses noise and ensures clean sound, thereby enabling the dynamic microphone core of this application embodiment to provide users with a clean, clear and high-fidelity sound acquisition experience.

[0066] The second aspect of this application discloses a device, which may be a professional microphone, recording equipment, or other devices related to professional recording, high-quality sound reinforcement, etc. The device includes: a dynamic microphone core according to the first aspect of this application.

[0067] It is easy to understand that the device in the second aspect embodiment of this application has the same technical effects as the dynamic microphone in the first aspect embodiment, and therefore will not be described again.

[0068] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0069] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more. It should be noted that the term "and / or" used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Similarly, at least one of A or B can also represent: A alone, A and B simultaneously, or B alone.

[0070] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0071] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A dynamic microphone core, characterized in that, include: Housing, magnetic field supply components, diaphragm assembly, and limiting components; The diaphragm assembly is configured in conjunction with the magnetic field providing assembly and is used to achieve acoustic-to-electric conversion. The housing has a groove; The magnetic field providing component is disposed within the groove and is spaced apart from the inner wall of the groove; The limiting component is disposed on the diaphragm assembly and located within the gap between the magnetic field providing component and the groove, and the limiting component is used to suppress the vibration fluctuation of the diaphragm assembly.

2. The dynamic microphone core according to claim 1, characterized in that: The limiting component is a damping ring, which is located within the groove and surrounds the magnetic field to provide the outer periphery of the component.

3. The dynamic microphone core according to claim 2, characterized in that: At least a portion of the damping ring is made of an elastic material.

4. The dynamic microphone core according to claim 1, characterized in that: The limiting component is connected to the diaphragm assembly by adhesive bonding.

5. The dynamic microphone core according to claim 1, characterized in that: The housing contains a U-shaped iron component, the groove is formed on the U-shaped iron component, the magnetic field providing component is disposed on the U-shaped iron component and located in the groove, and the limiting component is located between the groove and the magnetic field providing component.

6. The dynamic microphone core according to claim 1 or 5, characterized in that: The magnetic field providing component includes a magnet component and a magnetic guide component. The magnet component is located within the groove, and the magnetic guide component is connected to the side surface of the magnet component closest to the diaphragm assembly.

7. The dynamic microphone core according to claim 6, characterized in that: The magnet component includes multiple permanent magnets arranged in a symmetrical layout.

8. The dynamic microphone core according to claim 7, characterized in that: The magnet component includes a yoke and a magnetic pole structure. The permanent magnet is configured as a fan-shaped structure and is uniformly distributed circumferentially within the yoke. The magnetic pole structure is configured in conjunction with the permanent magnet and is used to guide the direction of the magnetic field.

9. The dynamic microphone core according to claim 8, characterized in that: The permanent magnet is made of neodymium iron boron material; And / or, the magnetic pole structure is made of a soft magnetic material.

10. A device, characterized in that, include: The dynamic microphone core as described in any one of claims 1 to 9.

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