Sound attenuating assembly and loudspeaker

Abstract

The application provides a sound-absorbing assembly and a loudspeaker, and relates to the technical field of loudspeakers. The sound-absorbing assembly is used in a loudspeaker, the loudspeaker comprises a voice coil and a diaphragm connected to the outer wall of the voice coil, the diaphragm has an opening on the side away from the voice coil, and the sound-absorbing assembly comprises: a dust cap arranged in the opening, the edge of the dust cap is used to be connected to the diaphragm; and a sound-absorbing piece, the sound-absorbing piece is fixed to the surface of the side of the dust cap close to the voice coil, and the thickness of the central region of the sound-absorbing piece is greater than the thickness of the edge region of the sound-absorbing piece. The difference between the acoustic impedance of the edge region of the sound-absorbing piece and air is not too large, so that high-frequency sound waves that are easy to cause subjective sharpness can be transmitted into the sound-absorbing piece without significant reflection. The thickness of the central region of the sound-absorbing piece is relatively thick, and the high-frequency sound waves can be efficiently consumed inside the sound-absorbing piece. Therefore, the sound-absorbing effect of the sound-absorbing piece on high-frequency sound waves is improved, the problems of excessive prominence of high-frequency sound, sharp sound and thin sound quality of the loudspeaker are improved, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of loudspeaker technology, and in particular to a noise reduction component and a loudspeaker. Background Technology

[0002] A loudspeaker is a transducer that converts electrical signals into sound signals. Audio electrical energy, through electromagnetic, piezoelectric, or electrostatic effects, causes its cone or diaphragm to vibrate and resonate with the surrounding air, producing sound. Loudspeakers are widely used in automotive, home, and mobile devices, and their performance greatly affects sound quality. While the loudspeaker is the weakest component in an audio system, it is also one of the most crucial elements for achieving optimal sound quality.

[0003] In related technologies, due to size limitations, the high-frequency part of the speaker's sound is more prevalent, resulting in a sharp subjective listening experience and a thin sound effect, which in turn affects the user's experience. Utility Model Content

[0004] This application provides a noise reduction component and a loudspeaker, which aims to improve the problems of excessive high-frequency emphasis, sharp sound, and thin sound quality in loudspeakers.

[0005] The specific technical solution is as follows: An embodiment of the first aspect of this application provides a noise reduction assembly for a loudspeaker, the loudspeaker including a voice coil and a diaphragm connected to the outer wall of the voice coil, the diaphragm having an opening on a side opposite to the voice coil, the noise reduction assembly including: a dust cap disposed within the opening, the edge of the dust cap being used to connect with the diaphragm; and a sound-absorbing element fixed to the surface of the dust cap near the voice coil, the sound-absorbing element having a central region thickness greater than the edge region thickness.

[0006] In this application, the thickness of the sound-absorbing component is designed differently, with the acoustic impedance of the central region being greater than that of the edge region. This creates a natural acoustic impedance transition from the thinner edge (lower acoustic impedance, closer to air) to the thicker center (higher acoustic impedance), effectively reducing the probability of sound wave reflection from the surface of the sound-absorbing component. When sound waves from the diaphragm propagate to the sound-absorbing component, they reach different locations on its surface: the difference in acoustic impedance between the edge region and air is not too large, preventing abrupt changes, allowing high-frequency sound waves that easily cause a subjectively sharp sensation to be transmitted into the sound-absorbing component without significant reflection. Meanwhile, the thicker central region of the sound-absorbing component has stronger sound absorption performance, allowing high-frequency sound waves to be efficiently dissipated within the component. Therefore, this differentiated matching improves the absorption effect of the sound-absorbing component on high-frequency sound waves, mitigating the problems of excessive high-frequency emphasis, sharp sound, and thin sound quality in loudspeakers, thus enhancing the user experience.

[0007] In some embodiments, the thickness of the sound-absorbing element gradually decreases along the direction from the center of the sound-absorbing element to any edge.

[0008] This design allows for a continuous, gradual change in acoustic impedance from the edge to the center of the sound-absorbing component, which helps to further reduce the probability of sound wave reflection on the surface of the component. Through this continuous change in acoustic impedance, high-frequency, harsh sound waves can be absorbed and efficiently dissipated, thereby further improving the absorption effect of the sound-absorbing component on high-frequency sound waves and addressing issues such as excessive high-frequency emphasis, sharp sound, and thin tone in loudspeakers.

[0009] In some embodiments, the surface of the sound-absorbing element facing away from the dust cap is a continuously curved surface that convexes outward.

[0010] This design creates an interface with continuously varying acoustic impedance on the outer surface of the sound-absorbing component. Because the surface is continuous, there are no abrupt changes, which helps to further reduce the probability of sound wave reflection from the surface of the sound-absorbing component. The continuous variation in acoustic impedance allows for the absorption and efficient dissipation of high-frequency, harsh sound waves, thereby further improving the absorption effect of the sound-absorbing component on high-frequency sound waves and addressing issues such as excessive high-frequency emphasis, sharp sound, and thin tone in loudspeakers.

[0011] In some embodiments, the sound-absorbing element is hemispherical, spherical, semi-ellipsoidal, saucer-shaped, or a parabolic rotating surface.

[0012] The aforementioned shapes all achieve a continuously varying acoustic impedance in the sound-absorbing component, thereby further improving its absorption of high-frequency sound waves and mitigating issues such as excessive high-frequency emphasis, sharp sound, and thin tone in loudspeakers. Furthermore, these shapes possess good structural strength and rigidity within a given volume, effectively resisting vibration and deformation. They are also relatively easy to manufacture using relevant processes, thus enhancing the reliability and stability of the sound-absorbing component, improving manufacturing convenience, and reducing production costs.

[0013] In some embodiments, the sound-absorbing element is connected to the dust cap via a first adhesive layer.

[0014] First, it helps improve the stability and reliability of the connection between the sound-absorbing components and the dust cap, which in turn improves the reliability and durability of the sound-absorbing assembly. Second, it facilitates the connection between the two, simplifies the production process, and increases efficiency.

[0015] In some embodiments, the dust cap is connected to the diaphragm via a second adhesive layer.

[0016] First, it helps improve the stability and reliability of the connection between the dust cap and the diaphragm, which in turn improves the reliability and durability of the loudspeaker. Second, it improves the ease of connection between the two, simplifies the manufacturing process, and increases efficiency.

[0017] In some embodiments, the dust cap protrudes toward the side closer to the sound-absorbing element; The edge of the dust cap overlaps with the diaphragm, and the width of the overlapping area is less than or equal to 5 mm and greater than or equal to 2 mm.

[0018] This design offers several advantages. First, it facilitates the connection between the dust cap and the diaphragm. Second, it ensures effective fixation between the dust cap and the diaphragm, enhancing the strength and reliability of their connection. Third, it avoids the problem of an excessively wide bonding area resulting in a small effective vibration area for the diaphragm, thus improving the efficiency of vibration energy transfer and enhancing the speaker's sensitivity and sound quality. Furthermore, it improves the consistency of the bonding, ensuring the uniformity and stability of the speaker's acoustic performance.

[0019] In some embodiments, along the direction from the sound-absorbing element to the dust cap, the projected area of ​​the sound-absorbing element accounts for 1%-5% of the projected area of ​​the dust cap.

[0020] This design offers several advantages. First, it ensures that the sound-absorbing component covers and acts on the core sound pressure area at the center of the dust cap. This area concentrates high-frequency sound waves, allowing the sound-absorbing component to precisely absorb harsh, high-frequency sounds. This helps to further improve the speaker's ability to produce excessively high frequencies, resulting in a sharp, thin sound and enhanced acoustic performance. Second, the sound-absorbing component is relatively small, making it compact and lightweight. This avoids adding extra load to the dust cap, reducing the probability of fatigue damage to the diaphragm and dust cap. Third, the sound-absorbing component does not excessively occupy the effective vibration area of ​​the diaphragm, thus improving the reliability and stability of the diaphragm's operation. Furthermore, it avoids problems such as volume attenuation and acoustic short circuits caused by large-area sound absorption, further improving the speaker's sound output efficiency.

[0021] In some embodiments, the sound-absorbing element is a porous sound-absorbing element.

[0022] Porous sound-absorbing components combine sound absorption and air permeability, exhibiting good absorption of high-frequency sound waves without hindering their normal propagation. This helps to improve the performance of loudspeakers while maintaining sound output efficiency, addressing issues such as excessive high-frequency emphasis, sharp sound, and thin tone. Furthermore, the good flexibility and machinability of porous sound-absorbing components enhance the ease of processing and reduce manufacturing costs.

[0023] An embodiment of the second aspect of this application provides a loudspeaker including a voice coil, a diaphragm, and the noise-reducing assembly described in the first aspect, wherein the inner edge of the diaphragm is connected to the outer wall of the voice coil, the diaphragm has an opening on a side opposite to the voice coil, a dust cap is disposed in the opening, and the edge of the dust cap is bonded to the diaphragm.

[0024] The loudspeaker in this embodiment uses the sound-absorbing component described in the first aspect. The difference between the acoustic impedance of the edge region of the sound-absorbing element and the air is not excessive, and no abrupt change occurs, allowing high-frequency sound waves that easily cause a subjectively sharp sensation to be transmitted to the sound-absorbing element without significant reflection. Meanwhile, the central region of the sound-absorbing element is thicker, resulting in stronger sound absorption performance, and high-frequency sound waves can be efficiently dissipated within the sound-absorbing element. Therefore, through differentiated matching, the absorption effect of the sound-absorbing element on high-frequency sound waves is improved, mitigating the problems of excessive high-frequency emphasis, sharp sound, and thin sound quality in loudspeakers, thereby enhancing the user experience.

[0025] In some embodiments, the device further includes a frame, the voice coil is disposed within the frame, and the outer edge of the diaphragm is connected to the frame.

[0026] The speaker basket is a rigid load-bearing structure that provides a mounting base for other components. By incorporating a basket, the reliability and stability of components such as the voice coil and diaphragm can be improved. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a loudspeaker provided in one embodiment of this application; Figure 2 This is an exploded view of a portion of the structure of a loudspeaker provided in an embodiment of this application; Figure 3 An exploded view of a portion of the structure of a loudspeaker provided in an embodiment of this application; Figure 4 A cross-sectional structural diagram of a loudspeaker (without the frame) provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a noise reduction assembly provided in an embodiment of this application; Figure 6 This is a partially enlarged structural diagram of a noise reduction component provided in an embodiment of this application.

[0028] The annotations in the attached figures are explained as follows: 10. Speaker; 100. Noise-absorbing component; 110. Dust cap; 120. Sound-absorbing component; 121. First adhesive layer; 200, Voice coil; 300, Diaphragm; 301, Opening; 400, Wire; 500, Frame; 600, Centering support; 700, Electrode; 800, Magnet; 900, U-shaped iron. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] A loudspeaker is a transducer that converts electrical signals into sound signals. Audio electrical energy, through electromagnetic, piezoelectric, or electrostatic effects, causes its cone or diaphragm to vibrate and resonate with the surrounding air, producing sound. Loudspeakers are widely used in automotive, home, and mobile devices, and their performance greatly affects sound quality. While the loudspeaker is the weakest component in an audio system, it is also one of the most crucial elements for achieving optimal sound quality.

[0034] In related technologies, due to size limitations, the high-frequency part of the speaker's sound is more prevalent, resulting in a sharp subjective listening experience and a thin sound effect, which affects the user's experience.

[0035] A common solution to address the issue of excessive high-frequency frequencies in loudspeakers is to incorporate sound-absorbing cotton within the speaker to absorb sharp, high-frequency sound waves. However, conventional sound-absorbing cotton is typically of uniform thickness, resulting in a significant difference in acoustic impedance compared to air. This creates a drastic change in acoustic impedance on the cotton's surface. This abrupt change causes most high-frequency sound waves to be directly reflected back to the diaphragm, not only minimizing the improvement in high-frequency sharpness but also potentially causing the reflected sound waves to superimpose and interfere with the original sound waves radiated by the diaphragm, further deteriorating sound quality.

[0036] Based on the above problems, the applicant discovered through in-depth research that the thickness of the sound-absorbing cotton can be differentiated to improve the problem of abrupt changes in acoustic impedance between air and sound-absorbing cotton, thereby effectively absorbing high-frequency noise.

[0037] Therefore, the applicant further developed the technical solution of the embodiments of this application. Specifically, this application proposes a noise reduction assembly for a loudspeaker, the loudspeaker including a voice coil and a diaphragm connected to the outer wall of the voice coil, the diaphragm having an opening on the side opposite to the voice coil, the noise reduction assembly including a dust cap and a sound-absorbing component, the dust cap being disposed in the opening, the edge of the dust cap being used to connect with the diaphragm; the sound-absorbing component being fixed to the surface of the dust cap near the voice coil, the thickness of the central region of the sound-absorbing component being greater than the thickness of the edge region of the sound-absorbing component.

[0038] In the above scheme, the thickness of the sound-absorbing component is designed differently, with the acoustic impedance of the central region being greater than that of the edge region. This creates a natural acoustic impedance transition from the thinner edge (lower acoustic impedance, closer to air) to the thicker center (higher acoustic impedance), effectively reducing the probability of sound wave reflection from the surface of the sound-absorbing component. When sound waves from the diaphragm propagate to the sound-absorbing component, they reach different positions on its surface: the difference in acoustic impedance between the edge region and air is not too large, preventing abrupt changes, allowing high-frequency sound waves that easily cause a subjectively sharp sound to be transmitted into the sound-absorbing component without significant reflection. Meanwhile, the thicker central region of the sound-absorbing component has stronger sound absorption performance, allowing high-frequency sound waves to be efficiently dissipated within the component. Therefore, through differentiated matching, the absorption effect of the sound-absorbing component on high-frequency sound waves is improved, mitigating the problems of excessive high-frequency emphasis, sharp sound, and thin sound quality in loudspeakers, thus enhancing the user experience.

[0039] The above is the core idea of ​​this application. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] like Figures 1 to 6 As shown, in a first aspect, this application provides a noise reduction assembly 100 for a loudspeaker 10. The loudspeaker 10 includes a voice coil 200 and a diaphragm 300 connected to the outer wall of the voice coil 200. The diaphragm 300 has an opening 301 on the side opposite to the voice coil 200. The noise reduction assembly 100 includes a dust cap 110 and a sound-absorbing component 120. The dust cap 110 is disposed in the opening 301, and the edge of the dust cap 110 is used to connect with the diaphragm 300. The sound-absorbing component 120 is fixed to the surface of the dust cap 110 near the voice coil 200, and the thickness of the central region of the sound-absorbing component 120 is greater than the thickness of the edge region of the sound-absorbing component 120.

[0041] The loudspeaker 10 includes a voice coil 200 and a diaphragm 300 connected to the outer wall of the voice coil 200. The voice coil 200 is the core component of the loudspeaker 10 that converts electrical energy into mechanical energy. It is typically constructed from a skeleton wound with copper wire and is essentially an electromagnet. The voice coil 200 is connected to a wire 400, which supplies current to the voice coil 200. When an audio current passes through it, the voice coil 200 generates a magnetic field that changes with the current. This changing magnetic field interacts with the fixed magnetic field of the magnetic circuit system inside the loudspeaker, driving the voice coil 200 to reciprocate.

[0042] The diaphragm 300 is connected to the outer wall of the voice coil 200. When the voice coil 200 reciprocates, it directly drives the diaphragm 300 to vibrate. The diaphragm 300 generates sound waves by pushing air, and is the direct source of sound. The voice coil 200 and the diaphragm 300 work together; the former provides power, and the latter converts the power into sound.

[0043] The diaphragm 300 can be made of flexible materials such as paper, plastic, or carbon fiber; for example, the diaphragm 300 can be a paper cone. The side of the diaphragm 300 facing away from the voice coil 200 has an opening 301. On the one hand, the opening 301 is used to guide sound waves to radiate outward, reducing the resistance to the movement of the diaphragm 300 and the split vibration. On the other hand, the opening 301 can provide installation space for the dust cap 110 of the noise reduction assembly 100, blocking dust, impurities, etc. from entering the magnetic gap and voice coil area inside the speaker, preventing component wear or short circuit.

[0044] The noise reduction assembly 100 includes a dust cap 110 and a sound-absorbing component 120. As mentioned above, the dust cap 110 is disposed within the opening of the diaphragm 300 and is fixedly connected to the diaphragm 300. In addition, the dust cap 110 also serves to supplement the structural strength of the diaphragm 300.

[0045] The sound-absorbing component 120 is fixed to the surface of the dust cap 110 near the voice coil 200. Specifically, the sound-absorbing component 120 is located at the center of the dust cap 110. The sound-absorbing component 120 adopts a non-uniform thickness design, which has the characteristics of being thicker in the central area and thinner at the edge area. The thickness refers to the dimension of the sound-absorbing component 120 in the direction perpendicular to the surface of the dust cap 110.

[0046] The central and edge regions are defined based on the thickness distribution of the sound-absorbing component 120. Specifically, the central region refers to the central portion of the sound-absorbing component 120 with the maximum thickness or a relatively high thickness, while the edge region refers to the annular portion of the sound-absorbing component 120 with a thickness significantly less than the central region, surrounding it. This division can be clearly defined geometrically. For example, based on radial dimensions, viewed from the direction of the sound-absorbing component 120 towards the dust cap 110, with the geometric center of the sound-absorbing component 120 as the reference point, the area within a radius R is defined as the central region, and the annular region outside the radius R is defined as the edge region; or, for example, based on projected area, viewed from the direction of the sound-absorbing component 120 towards the dust cap 110, with the geometric center of the sound-absorbing component 120 as the reference point, the central region, which accounts for a predetermined percentage of the total projected area of ​​the sound-absorbing component 120, is defined as the central region, and the remaining annular region is defined as the edge region, and so on. The specific values ​​of the percentage and radius R can be flexibly set according to the actual situation such as the speaker size (e.g., diaphragm size, dust cap size, etc.) and acoustic design goals. Optionally, in one embodiment, R can be 0.2 to 0.7 times the maximum radial dimension of the sound-absorbing element 120, and the percentage can be, for example, 20% to 70% of the total projected area of ​​the sound-absorbing element 120. Of course, it can also be other ranges, which are not limited in this application.

[0047] The acoustic impedance of the sound-absorbing component 120 is positively correlated with its thickness. Under the same conditions of material, density, and structure, the greater the thickness, the higher the acoustic impedance and the stronger the sound absorption performance.

[0048] In related technologies, a uniformly thick sound-absorbing component creates a drastic change in acoustic impedance between itself and the air, leading to the direct reflection of a large number of high-frequency sound waves. However, in this application, the thickness of the central and edge regions of the sound-absorbing component 120 is designed differently, with the acoustic impedance of the central region being greater than that of the edge region. This creates a natural acoustic impedance transition from the thinner edge (lower acoustic impedance, closer to air) to the thicker center (higher acoustic impedance), effectively reducing the probability of sound wave reflection on the surface of the sound-absorbing component 120. When sound waves from the diaphragm 300 propagate to the sound-absorbing component 120, they reach different locations on its surface: the difference in acoustic impedance between the edge region and the air is not too large, preventing abrupt changes, allowing high-frequency sound waves that easily cause a subjectively sharp sensation to be transmitted into the sound-absorbing component 120 without significant reflection. Meanwhile, the thicker central region of the sound-absorbing component 120 has stronger sound absorption performance, allowing high-frequency sound waves to be efficiently dissipated within the component. Therefore, by using differentiated matching, it is beneficial to improve the absorption effect of the sound-absorbing component 120 on high-frequency sound waves, improve the problem of excessive high-frequency prominence, sharp sound, and thin sound quality of the speaker, and thus improve the user experience.

[0049] like Figures 1 to 5 As shown, in some embodiments, the thickness of the sound-absorbing element 120 gradually decreases along the direction from the center of the sound-absorbing element 120 to any edge.

[0050] This embodiment proposes a preferred solution for the sound-absorbing component 120 to be thicker at the center and thinner at the edges. The thickness of the sound-absorbing component 120 gradually decreases from the center outwards. This design allows for a continuous gradual change in acoustic impedance from the edge to the center, which helps to further reduce the probability of sound wave reflection on the surface of the sound-absorbing component 120. Through the continuous change in acoustic impedance, high-frequency harsh sound waves can be absorbed and efficiently dissipated, thereby further improving the absorption effect of the sound-absorbing component 120 on high-frequency sound waves and further improving the problems of excessive high-frequency prominence, sharp sound, and thin sound quality of loudspeakers.

[0051] like Figures 1 to 5 As shown, in some embodiments, the surface of the sound-absorbing element 120 facing away from the dust cap 110 is a continuously convex curved surface. A continuously curved surface is a surface that is continuous at every point, without cracks or breaks.

[0052] This embodiment defines the surface shape of the sound-absorbing component 120 on the side opposite to the dust cap 110 as a continuously convex curved surface, thus forming an interface with continuously varying acoustic impedance on the outer surface of the sound-absorbing component 120. Because the curved surface is continuous, there are no abrupt surface changes, which helps to further reduce the probability of sound wave reflection on the surface of the sound-absorbing component 120. Through the continuous change in acoustic impedance, high-frequency harsh sound waves can be absorbed and efficiently dissipated, thereby further improving the absorption effect of the sound-absorbing component 120 on high-frequency sound waves and further improving the problems of excessively prominent high frequencies, sharp sound, and thin sound quality in loudspeakers.

[0053] In some embodiments, the sound-absorbing element 120 is hemispherical, spherical, semi-ellipsoidal, saucer-shaped, or a parabolic rotating surface.

[0054] This embodiment further defines the specific shape of the sound-absorbing element 120. All of the above shapes can achieve a continuously varying acoustic impedance for the sound-absorbing element 120, thereby further improving the absorption effect of the sound-absorbing element 120 on high-frequency sound waves and further improving the problems of excessive high-frequency emphasis, sharp sound, and thin sound quality in loudspeakers.

[0055] In addition, the above-mentioned shapes have good structural strength and rigidity under a given volume, which can effectively resist vibration deformation. They are also relatively easy to manufacture through relevant processes, which not only helps to improve the reliability and stability of the sound-absorbing component 120, but also helps to improve the convenience of manufacturing the sound-absorbing component 120 and reduce the manufacturing cost.

[0056] like Figure 5 and Figure 6 As shown, in some embodiments, the sound-absorbing element 120 is connected to the dust cap 110 via a first adhesive layer 121.

[0057] Using an adhesive bonding process to achieve a fixed connection between the sound-absorbing component 120 and the dust cap 110 has several advantages. First, it improves the stability and reliability of the connection between the sound-absorbing component 120 and the dust cap 110, thereby improving the reliability and durability of the sound-absorbing assembly 100. Second, it facilitates the connection between the two components, simplifies the manufacturing process, and increases efficiency. Optionally, the first adhesive layer 121 can be, for example, epoxy resin or acrylic adhesive.

[0058] Of course, alternatively, the sound-absorbing component 120 can also be fixedly connected to the dust cap 110 in other ways, such as by ultrasonic welding, hot pressing, or insert injection molding. This application does not limit this.

[0059] In some embodiments, the dust cap 110 is connected to the diaphragm 300 via a second adhesive layer (not shown).

[0060] Using an adhesive bonding process to achieve a fixed connection between the dust cap 110 and the diaphragm 300 has several advantages. First, it improves the stability and reliability of the connection between the dust cap 110 and the diaphragm 300, thereby enhancing the reliability and durability of the speaker 10. Second, it facilitates the connection process, simplifies manufacturing, and increases efficiency. Optionally, the second adhesive layer can be, for example, epoxy resin or acrylic adhesive.

[0061] Of course, alternatively, the dust cap 110 can also be fixedly connected to the diaphragm 300 in other ways, such as by hot pressing, integral molding, etc., and this application does not limit this.

[0062] like Figures 1 to 4 As shown, in some embodiments, the dust cap 110 protrudes toward the side closer to the sound-absorbing member 120, and the edge of the dust cap 110 overlaps with the diaphragm 300 in an overlapping area H, the width of the overlapping area H being less than or equal to 5 mm and greater than or equal to 2 mm.

[0063] The dust cap 110 is a bowl-shaped structure that protrudes toward the sound-absorbing component 120. This shape is adapted to the shape of the opening 301 of the diaphragm 300, thereby improving the ease of connection between the dust cap 110 and the diaphragm 300.

[0064] Furthermore, the aforementioned overlapping area H is the bonding area between the dust cap 110 and the diaphragm 300. Controlling the width of this bonding area within the range of 2mm-5mm firstly ensures effective fixation between the dust cap 110 and the diaphragm 300, improving the strength and reliability of their connection. Secondly, it avoids the problem of an excessively wide bonding area resulting in a small effective vibration area for the diaphragm 300, thus improving the efficiency of vibration energy transmission and enhancing the speaker's sensitivity and sound quality. Additionally, it improves the consistency of the bonding, thereby ensuring the uniformity and stability of the speaker 10's acoustic performance.

[0065] like Figure 5 As shown, in some embodiments, along the direction from the sound-absorbing element 120 to the dust cap 110, the projected area of ​​the sound-absorbing element 120 accounts for 1%-5% of the projected area of ​​the dust cap 110.

[0066] This configuration has several advantages. First, it ensures that the sound-absorbing component 120 covers and acts on the core sound pressure area at the center of the dust cap 110. High-frequency sound waves are concentrated in this area, allowing the sound-absorbing component 120 to precisely absorb harsh high-frequency sound waves. This helps to further improve the speaker's excessive high-frequency emphasis, sharp sound, and thin tone, thus enhancing the sound output and acoustic performance. Second, the sound-absorbing component 120 has a small footprint, resulting in a small size and light weight. This avoids adding extra load to the dust cap 110, reducing the probability of fatigue damage to the diaphragm 300 and the dust cap 110. Third, the sound-absorbing component 120 does not excessively occupy the effective vibration area of ​​the diaphragm 300, thereby improving the reliability and stability of the diaphragm 300. Furthermore, it avoids problems such as volume attenuation and acoustic short circuits caused by the large area of ​​sound absorption by the sound-absorbing component 120, further improving the sound output efficiency of the speaker 10.

[0067] In some embodiments, the sound-absorbing component 120 is a porous sound-absorbing component. A porous sound-absorbing component refers to a component with a continuous three-dimensional pore structure, which dissipates the sound wave energy through friction with the pore walls, air viscosity damping, and thermal conduction after the sound wave enters the pores, thereby achieving the sound absorption function. Specifically, the sound-absorbing component 120 can be, for example, sound-absorbing cotton, polyester fiber cotton, polyurethane foam, etc.

[0068] Porous sound-absorbing components combine sound absorption and air permeability, exhibiting good absorption of high-frequency sound waves without hindering their normal propagation. This helps to improve the problem of excessively prominent high frequencies, sharp sound, and thin tone in loudspeakers while maintaining sound output efficiency. Furthermore, the good flexibility and machinability of porous sound-absorbing components enhance the ease of processing and reduce manufacturing costs.

[0069] like Figures 1 to 4 As shown, in a second aspect, this application provides a loudspeaker 10. The loudspeaker 10 includes a voice coil 200, a diaphragm 300, and a noise reduction assembly 100 as described in the first aspect. The inner edge of the diaphragm 300 is connected to the outer wall of the voice coil 200. The diaphragm 300 has an opening 301 on the side opposite to the voice coil 200. A dust cap 110 is disposed in the opening 301, and the edge of the dust cap 110 is bonded to the diaphragm 300.

[0070] The loudspeaker 10 in this embodiment uses the sound-absorbing component 100 described in the first aspect. The difference between the acoustic impedance of the edge region of the sound-absorbing element 120 and the air is not excessive, and no abrupt change occurs. This allows high-frequency sound waves that easily cause a subjectively sharp sensation to be transmitted to the sound-absorbing element 120 without significant reflection. The central region of the sound-absorbing element 120 is thicker and has stronger sound absorption performance, allowing high-frequency sound waves to be efficiently dissipated within the sound-absorbing element 120. Therefore, through differentiated matching, the absorption effect of the sound-absorbing element 120 on high-frequency sound waves is improved, mitigating the problems of excessive high-frequency emphasis, sharp sound, and thin sound quality in the loudspeaker, thereby improving the user experience.

[0071] like Figures 1 to 4 As shown, in some embodiments, the loudspeaker 10 further includes a frame 500, a voice coil 200 disposed within the frame 500, and the outer edge of the diaphragm 300 connected to the frame 500.

[0072] The speaker frame 500 is a rigid load-bearing structure for the loudspeaker 10, providing a mounting base for other components. By setting up the speaker frame 500, the reliability and stability of components such as the voice coil 200 and the diaphragm 300 can be improved.

[0073] Optionally, such as 1 to Figure 4 As shown, the loudspeaker 10 also includes a centering support plate 600, a pole piece 700, a magnet 800, and a U-shaped iron 900.

[0074] The centering support 600, also known as a spider, is used to limit the radial displacement of the voice coil 200 and ensure its axial free vibration. The magnetic circuit system of the loudspeaker 10 is mainly composed of pole piece 700, magnet 800 and U-shaped iron 900. The pole piece 700 is also known as a magnetic core, the magnet 800 is also known as a magnet, and the U-shaped iron 900 is also known as a magnetic cup.

[0075] The pole piece 700 and the magnet 800 are housed within the U-shaped iron 900 and are coaxially assembled. An annular air gap is formed between the annular sidewall of the U-shaped iron 900 and the outer circumferential surface of the pole piece 700. The lower end of the voice coil 200 is vertically inserted into this air gap without contacting the pole piece 700 or the U-shaped iron 900. The static magnetic field provided by the magnet 800 is guided by the pole piece 700 and transformed into a uniform radial magnetic field within the air gap. The magnetic lines of force are then guided back to the magnet 800 by the U-shaped iron 900, forming a closed magnetic circuit. This closed magnetic circuit drives the voice coil 200 to reciprocate.

[0076] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A noise reduction assembly for a loudspeaker, the loudspeaker comprising a voice coil and a diaphragm connected to an outer wall of the voice coil, the diaphragm having an opening opposite to the voice coil, characterized in that, The noise reduction assembly includes: A dust cap is disposed within the opening, and the edge of the dust cap is used for connection with the diaphragm; and A sound-absorbing component is fixed to the surface of the dust cap near the voice coil, and the thickness of the central region of the sound-absorbing component is greater than the thickness of the edge region of the sound-absorbing component.

2. The noise reduction assembly according to claim 1, characterized in that, The thickness of the sound-absorbing element gradually decreases along the direction from the center of the sound-absorbing element to any edge.

3. The noise reduction assembly according to claim 1, characterized in that, The surface of the sound-absorbing component facing away from the dust cap is a continuous curved surface that bulges outward.

4. The noise reduction assembly according to claim 1, characterized in that, The sound-absorbing component is hemispherical, spherical, semi-ellipsoidal, saucer-shaped, or a parabolic rotating surface.

5. The noise reduction assembly according to claim 1, characterized in that, The sound-absorbing component is connected to the dust cap through a first adhesive layer; And / or, the dust cap is connected to the diaphragm via a second adhesive layer.

6. The noise reduction assembly according to claim 1, characterized in that, The dust cap protrudes towards the side closest to the sound-absorbing component; The edge of the dust cap overlaps with the diaphragm, and the width of the overlapping area is less than or equal to 5 mm and greater than or equal to 2 mm.

7. The noise reduction assembly according to claim 1, characterized in that, Along the direction from the sound-absorbing element to the dust cap, the projected area of ​​the sound-absorbing element accounts for 1%-5% of the projected area of ​​the dust cap.

8. The noise reduction assembly according to claim 1, characterized in that, The sound-absorbing component is a porous sound-absorbing component.

9. A loudspeaker, characterized in that, The device includes a voice coil, a diaphragm, and a noise reduction assembly as described in any one of claims 1-8, wherein the inner edge of the diaphragm is connected to the outer wall of the voice coil, the diaphragm has an opening on the side opposite to the voice coil, a dust cap is disposed in the opening, and the edge of the dust cap is bonded to the diaphragm.

10. The loudspeaker according to claim 9, characterized in that, It also includes a frame, the voice coil is disposed inside the frame, and the outer edge of the diaphragm is connected to the frame.

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