Diaphragm assembly and loudspeaker

Abstract

The application provides a vibrating diaphragm assembly and a loudspeaker, and relates to the technical field of loudspeakers. The vibrating diaphragm assembly comprises a vibrating diaphragm, a first folding ring and a second folding ring. The first folding ring is connected with an outer edge of the vibrating diaphragm, and the second folding ring is connected with the first folding ring and located on a side of the first folding ring away from the vibrating diaphragm. One of the first folding ring and the second folding ring is a foam folding ring, and the other is a rubber folding ring. In a low-temperature environment, although the rubber folding ring will harden, the foam folding ring can still maintain relatively stable performance, provide elastic restoring force to the vibrating diaphragm, keep the overall stiffness of the vibrating system stable, and maintain the resonance frequency change within a controllable range, which enables the loudspeaker to maintain stable low-frequency response and normal sound production function in a low-temperature environment. Thus, the working stability and reliability of the loudspeaker in a low-temperature environment can be improved under the condition of ensuring low cost, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of loudspeaker technology, and in particular to a diaphragm assembly 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 a loudspeaker is a relatively weak component in audio equipment, it is a crucial element for achieving optimal sound effects.

[0003] In related technologies, the vibration system of a loudspeaker includes a diaphragm, a voice coil, and a surround for supporting the diaphragm. The surround not only serves a suspension function but also adjusts the loudspeaker's low-frequency performance, total harmonic distortion, and other acoustic properties.

[0004] Currently, loudspeakers commonly use rubber (such as nitrile rubber) as the surround material. Rubber surrounds possess good elasticity, resilience, and durability at room temperature; however, their physical properties are significantly affected by temperature. In low-temperature environments, the rubber surround hardens due to its inherent physical properties, causing a significant change in the resonant frequency of the vibration system, thus leading to a deterioration in the loudspeaker's sound quality. In severe cases, it can even affect the normal operation and sound production of the loudspeaker. Utility Model Content

[0005] This application provides a diaphragm assembly and a loudspeaker, aiming to improve the problem of deteriorated sound quality or even difficulty in normal operation of the loudspeaker caused by the hardening of the rubber surround in low-temperature environments.

[0006] The specific technical solution is as follows: An embodiment of the first aspect of this application provides a diaphragm assembly. The diaphragm assembly includes: a diaphragm; a first folded ring and a second folded ring, wherein the first folded ring is connected to the outer edge of the diaphragm, and the second folded ring is connected to the first folded ring and located on the side of the first folded ring opposite to the diaphragm; wherein one of the first folded ring and the second folded ring is a foam folded ring, and the other is a rubber folded ring.

[0007] In this application, one of the first and second surrounds is a foam surround, and the other is a rubber surround. At room temperature, the first and second surrounds work together to control the smooth movement of the diaphragm, ensuring normal sound production from the speaker. At low temperatures, although the rubber surround hardens, the foam surround maintains relatively stable performance, providing elastic restoring force to the diaphragm, keeping the overall stiffness of the vibration system stable, and maintaining the resonant frequency variation within a controllable range. This allows the speaker to maintain a stable low-frequency response and normal sound production even at low temperatures. Therefore, while maintaining low cost, the speaker's operational stability and reliability at low temperatures can be improved, thus enhancing the user experience. Secondly, the combined surround structure of the first and second surrounds also helps reduce the speaker's total harmonic distortion, improving sound quality under normal conditions. Furthermore, it helps reduce the driving force requirement, thus improving the speaker's sensitivity. In addition, it helps address the insufficient mechanical strength of a single foam surround, thus improving the working durability and service life of the diaphragm assembly.

[0008] In some embodiments, the first fold is bonded to the diaphragm.

[0009] First, it helps improve the stability and reliability of the connection between the two components, which in turn improves the reliability and durability of the diaphragm assembly. Second, it facilitates the connection between the two components, simplifies the manufacturing process, and increases efficiency.

[0010] In some embodiments, the second fold ring and the first fold ring are bonded together.

[0011] First, it helps improve the stability and reliability of the connection between the two components, which in turn improves the reliability and durability of the diaphragm assembly. Second, it improves the ease of connection between the two components, simplifies the production process, increases efficiency, and reduces costs.

[0012] In some embodiments, the first fold and the second fold have the same radial width.

[0013] This configuration offers several advantages. First, the two folded rings can be designed using the same or similar cross-sectional profiles, which helps reduce design and development costs and timelines. Second, the identical radial width unifies the geometric reference, reducing the number of variable parameters when the two folded rings are vibrating, thus improving the design convenience and reducing complexity of the first and second folded rings. Furthermore, it also improves production consistency and efficiency.

[0014] In some embodiments, the first fold and the second fold have the same thickness.

[0015] This configuration has several advantages. First, it reduces the number of variable parameters when adjusting the vibration of the two folded rings, thus improving the ease of design and development of both rings and reducing design complexity and development cycle. Second, if the two folded rings have significantly different thicknesses, stress concentration will occur near the connection interface due to abrupt changes in stiffness. Setting them to have the same thickness also helps reduce the probability of premature failure at the connection interface due to stress concentration, thereby improving the reliability and durability of the diaphragm assembly.

[0016] In some embodiments, the first fold ring has a first protrusion extending circumferentially and a first connecting portion and a second connecting portion disposed on opposite sides of the first protrusion. The second fold ring has a second protrusion extending in the circumferential direction and a third connecting portion and a fourth connecting portion disposed on opposite sides of the second protrusion; The first connecting part is connected to the edge of the diaphragm, and the second connecting part is connected to the third connecting part.

[0017] The first and second protrusions provide elastic deformation and damping for the first and second surrounds, respectively, to meet acoustic performance requirements. The first connecting part connects the diaphragm and the first surround, the fourth connecting part connects the second surround and the frame, and the second and third connecting parts connect the second surround and the first surround. This arrangement improves the convenience and reliability of the connections between the various components, thereby enhancing the consistency and reliability of the loudspeaker.

[0018] In some embodiments, the first protrusion and the second protrusion have the same shape.

[0019] This configuration offers several advantages. First, it reduces the number of variable parameters required for acoustic tuning of the two folds, thereby improving the ease of design and development of both the first and second folds, and reducing design complexity and development cycle. Second, the two protrusions can be designed with the same or similar cross-sectional profiles, further reducing design and development costs and time. Additionally, it improves production consistency and efficiency.

[0020] In some embodiments, the first protrusion and the second protrusion have the same or opposite protrusion directions.

[0021] The above design allows for combinations of different protrusion directions of the first convex portion of the first folded ring and the second convex portion of the second folded ring, thereby altering the acoustic characteristics of the vibration wave propagating between the two folded rings. This arrangement enhances the flexibility and scalability of the first and second folded ring designs.

[0022] In some embodiments, both the first protrusion and the second protrusion protrude toward the side away from the diaphragm, or both the first protrusion and the second protrusion protrude toward the side closer to the diaphragm.

[0023] In this configuration, the first and second protrusions radiate in the same direction. Furthermore, this allows the speaker to maintain a stable low-frequency response and normal sound production even in low-temperature environments. Therefore, while maintaining low cost, the speaker's operational stability and reliability in low-temperature conditions can be improved, thereby enhancing the user experience.

[0024] In some embodiments, one of the first protrusion and the second protrusion protrudes toward the side away from the diaphragm, and the other protrudes toward the side closer to the diaphragm.

[0025] In this configuration, the first and second protrusions face opposite directions. This allows the speaker to maintain a stable low-frequency response and normal sound production even in low-temperature environments. Therefore, while maintaining low cost, the speaker's operational stability and reliability in low-temperature conditions can be improved, thereby enhancing the user experience.

[0026] An embodiment of the second aspect of this application provides a loudspeaker including the diaphragm assembly described in the first aspect.

[0027] At room temperature, the first and second surrounds work together to control the smooth movement of the diaphragm, ensuring normal sound production from the speaker. At low temperatures, although the rubber surround hardens, the foam surround maintains relatively stable performance, providing elastic restoring force to the diaphragm and keeping the overall stiffness of the vibration system stable. This keeps the resonant frequency variation within a controllable range, allowing the speaker to maintain a stable low-frequency response and normal sound production even in low-temperature environments. Therefore, while maintaining low cost, this improves the speaker's operational stability and reliability in low-temperature environments, thus enhancing the user experience. Secondly, the combined surround structure of the first and second surrounds helps reduce the speaker's total harmonic distortion, improving sound quality under normal conditions. Furthermore, it reduces the driving force required, thus improving the speaker's sensitivity. Additionally, it addresses the issue of insufficient mechanical strength in a single foam surround, further improving the durability and lifespan of the diaphragm assembly.

[0028] In some embodiments, the device further includes a voice coil and a frame, wherein the voice coil and the diaphragm are disposed within the frame; The inner edge of the diaphragm is connected to the voice coil, and the end of the second surround away from the first surround is connected to the frame.

[0029] This configuration helps improve the reliability and stability of components such as the voice coil, diaphragm, first surround, and second surround. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a diaphragm assembly provided in an embodiment of this application; Figure 2 This is a cross-sectional structural schematic diagram of a diaphragm assembly provided in an embodiment of this application; Figure 3 A schematic cross-sectional view of a loudspeaker provided in one embodiment of this application; Figure 4 A schematic diagram of another cross-sectional structure of a loudspeaker provided in one embodiment of this application; Figure 5 A schematic cross-sectional view of a loudspeaker provided in one embodiment of this application; Figure 6 This is a schematic cross-sectional view of a loudspeaker provided in one embodiment of this application.

[0031] The annotations in the attached figures are explained as follows: 10. Speaker; 100. Diaphragm assembly; 110. Diaphragm; 111. Opening; 120. First fold ring; 121. First protrusion; 122. First connecting part; 123. Second connecting part; 130. Second fold ring; 131. Second protrusion; 132. Third connecting part; 133. Fourth connecting part. 200, voice coil; 300, dust cap; 500, basket frame; 600, centering support; 700, pole piece; 800, magnet; 900, U-shaped iron. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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 a loudspeaker is a relatively weak component in audio equipment, it is a crucial element for achieving optimal sound effects.

[0037] In related technologies, a loudspeaker's vibration system includes a diaphragm, a voice coil, and a surround to support the diaphragm. Currently, loudspeakers commonly use rubber (such as nitrile rubber) as the surround material. Rubber surrounds possess good elasticity, resilience, and durability at room temperature; however, their physical properties are significantly affected by temperature. At low temperatures, the rubber surround hardens due to its inherent physical properties, causing a significant change in the resonant frequency of the vibration system, thus leading to a deterioration in the loudspeaker's sound quality. In severe cases, it can even affect the loudspeaker's normal operation and sound production.

[0038] One solution to improve the reliability of loudspeakers in low-temperature environments is to use a special rubber compound with higher low-temperature resistance in the surround material. However, this often comes at the cost of a significant increase, with limited performance improvement. Another solution is to use a foam surround, which has better temperature stability and performs well in low-temperature environments. However, the mechanical strength and durability of a foam surround are inferior to those of a rubber surround, resulting in a significant reduction in the speaker's lifespan.

[0039] Based on the above problems, the applicant discovered through in-depth research that two different materials of folding rings can be set in series, one of which is a rubber folding ring and the other is a foam folding ring. This design has both the control force of the rubber folding ring and the easy drive and temperature stability of the foam folding ring.

[0040] Therefore, the applicant further developed the technical solution of the embodiments of this application. Specifically, this application proposes a diaphragm assembly, including a diaphragm, a first folded ring, and a second folded ring. The first folded ring is connected to the outer edge of the diaphragm, and the second folded ring is connected to the first folded ring and located on the side of the first folded ring away from the diaphragm. One of the first folded ring and the second folded ring is a foam folded ring, and the other is a rubber folded ring.

[0041] In the above solution, under normal temperature conditions, the first and second surrounds work together to control the smooth movement of the diaphragm and ensure normal sound production from the speaker. Under low temperature conditions, although the rubber surrounds harden, the foam surrounds maintain relatively stable performance, providing elastic restoring force to the diaphragm and keeping the overall stiffness of the vibration system stable. This keeps the resonant frequency variation within a controllable range, allowing the speaker to maintain a stable low-frequency response and normal sound production even in low-temperature environments. Therefore, while ensuring low cost, the speaker's operational stability and reliability in low-temperature environments can be improved, thereby enhancing the user experience.

[0042] 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.

[0043] like Figures 1 to 6 As shown, in a first aspect, embodiments of this application provide a diaphragm assembly 100. The diaphragm assembly 100 includes a diaphragm 110, a first folded ring 120, and a second folded ring 130. The first folded ring 120 is connected to the outer edge of the diaphragm 110, and the second folded ring 130 is connected to the first folded ring 120 and located on the side of the first folded ring 120 away from the diaphragm 110. One of the first folded ring 120 and the second folded ring 130 is a foam folded ring, and the other is a rubber folded ring.

[0044] The diaphragm assembly 100 includes a diaphragm 110, a first surround 120, and a second surround 130. The diaphragm 110 is the direct sound source, used to convert the mechanical vibration of the voice coil 200 into sound wave radiation. The diaphragm 110 can be made of flexible materials such as paper, plastic, or carbon fiber; for example, the diaphragm 110 can be a paper cone. The side of the diaphragm 110 facing away from the voice coil 200 has an opening 111. On one hand, the opening 111 guides the sound waves outward, reducing the resistance to the movement of the diaphragm 110 and reducing its vibration. On the other hand, the opening 111 provides installation space for the dust cap 300, which prevents dust, impurities, etc., from entering the magnetic gap area inside the speaker, preventing component wear or short circuits.

[0045] The first folding ring 120 is directly connected to the diaphragm 110, and the second folding ring 130 is connected to the outside of the first folding ring 120, forming a series structure. That is, this application changes one folding ring in the related technology to two folding rings connected in series. The first folding ring 120 and the second folding ring 130 work together to suspend and support the diaphragm 110, guide and control its reciprocating motion, and jointly bear the vibration stress. Together, they serve as elastic support components for the loudspeaker 10, and their composite compliance determines the resonant frequency, low-frequency performance, etc. of the vibration system. In addition, the first folding ring 120 and the second folding ring 130 can also assist the centering support plate 600 in radially positioning the diaphragm 110 and the voice coil 200, keeping the voice coil 200 in the center of the magnetic gap without eccentricity.

[0046] Furthermore, in this application, one of the first fold ring 120 and the second fold ring 130 is a foam fold ring, and the other is a rubber fold ring. Rubber has the advantages of high elasticity, high mechanical strength, and high durability, but its elastic modulus (stiffness) is significantly affected by temperature, with hardness increasing sharply and compliance decreasing at low temperatures. In contrast, foam has better temperature stability than rubber, and its compliance change at low temperatures is much smaller than that of rubber.

[0047] Based on the above structure, under normal temperature conditions, the first surround 120 and the second surround 130 work together to control the smooth movement of the diaphragm 110, ensuring normal sound production of the speaker 10. Under low temperature conditions, although the rubber surround will harden, the foam surround can still maintain relatively stable performance, providing elastic restoring force to the diaphragm 110, keeping the overall stiffness of the vibration system stable, and maintaining the resonant frequency variation within a controllable range. This allows the speaker 10 to maintain a stable low-frequency response and normal sound production function even in low-temperature environments. Therefore, while ensuring low cost, the operational stability and reliability of the speaker 10 in low-temperature environments can be improved, thereby enhancing the user experience.

[0048] Secondly, the first surround 120 and the second surround 130 constitute a combined surround structure. Under normal circumstances, the rubber surround provides the main elastic restoring force, ensuring that the diaphragm 110 is subject to good control and low distortion; while the foam surround, due to its high internal damping characteristics, can absorb unnecessary vibration energy from the diaphragm 110 and the two surrounds, suppressing split vibration and harmful resonance. This also helps to reduce the total harmonic distortion of the speaker 10 and improve the sound quality performance of the speaker 10 under normal conditions.

[0049] Furthermore, the combination of foam surrounds and rubber surrounds can reduce the overall dynamic stiffness of the vibration system, thereby reducing the driving force requirement and further improving the sensitivity of the speaker 10.

[0050] Furthermore, the first fold ring 120 and the second fold ring 130, through a series connection, can achieve optimized distribution of mechanical stress. The rubber fold ring bears the main alternating mechanical stress, which helps to improve the insufficient mechanical strength of a single foam fold ring, and further improves the working durability and service life of the diaphragm assembly 100.

[0051] like Figures 1 to 6 As shown, in some embodiments, the first fold 120 is bonded to the diaphragm 110.

[0052] Using an adhesive bonding process has several advantages. First, it improves the stability and reliability of the connection between the two components, thereby enhancing the reliability and durability of the diaphragm assembly 100. Second, it simplifies the connection process, making the manufacturing process easier and increasing efficiency. Optionally, epoxy resin adhesives, acrylic adhesives, or similar materials can be used for bonding.

[0053] like Figure 5 and Figure 6 As shown, in some embodiments, the second fold 130 and the first fold 120 are bonded together.

[0054] The use of adhesive bonding has several advantages. First, it improves the stability and reliability of the connection between the two components, thereby enhancing the reliability and durability of the diaphragm assembly 100. Second, it simplifies the connection process, reduces production efficiency, and lowers costs. Optionally, epoxy resin adhesives, acrylic adhesives, or similar materials can be used for bonding.

[0055] Of course, in other embodiments, the connection between the first fold 120 and the second fold 130 can also be achieved in other ways, such as by ultrasonic welding, hot melting, secondary molding (such as insert molding), etc. This application does not limit this.

[0056] like Figures 3 to 6 As shown, in some embodiments, the first fold 120 and the second fold 130 have the same radial width.

[0057] Radial width refers to the length from the inner edge to the outer edge of the fold.

[0058] This configuration offers several advantages. First, the two folded rings can be designed with the same or similar cross-sectional profiles, which helps reduce design and development costs and timelines. Second, the identical radial width unifies the geometric reference, reducing the number of variable parameters when the two folded rings are vibrating together. This also improves the design convenience of the first folded ring 120 and the second folded ring 130, reducing design complexity. Furthermore, it improves production consistency and efficiency.

[0059] like Figures 3 to 6 As shown, in some embodiments, the first fold 120 and the second fold 130 have the same thickness. The thickness of the fold is one of the determining factors of its stiffness.

[0060] This configuration, firstly, reduces the number of variable parameters when the two folded rings are used for vibration tuning, thereby improving the ease of design and development of the first folded ring 120 and the second folded ring 130, and reducing design complexity and development cycle. Secondly, if the two folded rings have significantly different thicknesses, stress concentration will occur near the connection interface due to abrupt changes in stiffness. Setting them to have the same thickness also helps reduce the probability of premature failure at the connection interface due to stress concentration, thus improving the reliability and durability of the diaphragm assembly 100.

[0061] like Figures 2 to 6 As shown, in some embodiments, the first folding ring 120 has a first protrusion 121 extending circumferentially thereon and a first connecting portion 122 and a second connecting portion 123 disposed on opposite sides of the first protrusion 121. The second folding ring 130 has a second protrusion 131 extending circumferentially thereon and a third connecting portion 132 and a fourth connecting portion 133 disposed on opposite sides of the second protrusion 131. The first connecting portion 122 is connected to the edge of the diaphragm 110, and the second connecting portion 123 is connected to the third connecting portion 132.

[0062] This embodiment presents the specific structures of the first folded ring 120 and the second folded ring 130, wherein the first protrusion 121 and the second protrusion 131 provide elastic deformation and damping for the first folded ring 120 and the second folded ring 130, respectively, to meet the acoustic performance requirements; the first connecting part 122 is used to realize the connection between the diaphragm 110 and the first folded ring 120, the fourth connecting part 133 is used to realize the connection between the second folded ring 130 and the frame 500, and the second connecting part 123 and the third connecting part 132 are used to realize the connection between the second folded ring 130 and the first folded ring 120.

[0063] This configuration improves the convenience and reliability of the connections between the various components, thereby enhancing the consistency and reliability of the speaker 10.

[0064] In addition, each connecting part can provide an installation base for the fixed connection, which also helps to reduce the assembly difficulty and improve the assembly efficiency.

[0065] like Figures 2 to 6 As shown, in some embodiments, the first protrusion 121 and the second protrusion 131 have the same shape.

[0066] Having the same shape means that the two have the same profile curve in the cross section in the thickness direction. For example, they can be semi-circular, arc-shaped, etc.

[0067] The shape of the convex portion is a decisive factor in the deformation state and compliance parameters of the folded ring under stress. This design, firstly, reduces the number of variable parameters when acoustically matching the two folded rings, thereby improving the ease of design and development of the first folded ring 120 and the second folded ring 130, reducing design complexity and development cycle. Secondly, the two convex portions can be designed with the same or similar cross-sectional profiles, which helps reduce design and development costs and cycles. Furthermore, it also improves production consistency and efficiency.

[0068] like Figures 3 to 6 As shown, in some embodiments, the first protrusion 121 and the second protrusion 131 have the same or opposite protrusion directions.

[0069] The direction of the protrusions affects acoustic properties such as mechanical compliance and distortion control of a single surround. The protrusion directions of the first protrusion 121 and the second protrusion 131 can be the same or opposite. When they are the same, the double-convex design can superimpose compliance, allowing the diaphragm 110 to produce a larger amplitude; the double-concave design can superimpose lateral stiffness, suppressing lateral wobble of the diaphragm 110 and reducing mid-high frequency distortion. Conversely, the combination of concave and convex designs can improve the mid-frequency valley phenomenon caused by resonance in the surround itself, thus improving sound quality.

[0070] Through the above design, it is possible to achieve combinations of different protrusion directions for the first protrusion 121 of the first folded ring 120 and the second protrusion 131 of the second folded ring 130, thereby changing the acoustic characteristics of the vibration wave transmitted between the two folded rings. This arrangement is beneficial to improving the flexibility and scalability of the design of the first folded ring 120 and the second folded ring 130.

[0071] It is understandable that the protrusion direction of the first protrusion 121 and the second protrusion 131 can be flexibly designed according to the application scenario, performance requirements, etc.

[0072] Specifically, in some embodiments, both the first protrusion 121 and the second protrusion 131 protrude toward the side opposite to the diaphragm 110. Alternatively, both the first protrusion 121 and the second protrusion 131 protrude toward the side closer to the diaphragm 110. In this case, the protrusion directions of the first protrusion 121 and the second protrusion 131 are the same.

[0073] For example, in some embodiments, one of the first protrusion 121 and the second protrusion 131 protrudes toward the side away from the diaphragm 110, and the other protrudes toward the side closer to the diaphragm 110. In this case, the protrusion directions of the first protrusion 121 and the second protrusion 131 are opposite.

[0074] Through the different combinations of designs described above, the speaker 10 can maintain a stable low-frequency response and normal sound production function in low-temperature environments. Therefore, while ensuring low cost, the operational stability and reliability of the speaker 10 in low-temperature environments can be improved, thereby enhancing the user experience.

[0075] like Figures 3 to 6 As shown, in a second aspect, embodiments of this application provide a loudspeaker 10, including the diaphragm assembly 100 described in the first aspect.

[0076] The loudspeaker 10 of this embodiment uses the diaphragm assembly 100 described in the first aspect. The diaphragm assembly 100 includes a diaphragm 110, a first surround 120, and a second surround 130. One of the first surround 120 and the second surround 130 is a foam surround, and the other is a rubber surround. At room temperature, the first surround 120 and the second surround 130 work together to control the smooth movement of the diaphragm 110, ensuring that the loudspeaker 10 can produce sound normally. At low temperatures, although the rubber surround hardens, the foam surround maintains relatively stable performance, providing elastic restoring force to the diaphragm 110, keeping the overall stiffness of the vibration system relatively stable, and maintaining the resonant frequency variation within a controllable range. This allows the loudspeaker 10 to maintain a stable low-frequency response and normal sound production function even at low temperatures. Therefore, while ensuring low cost, the operational stability and reliability of the loudspeaker 10 in low-temperature environments can be improved, thereby enhancing the user experience.

[0077] Secondly, the first surround 120 and the second surround 130 form a combined surround structure, which also helps to reduce the total harmonic distortion of the speaker 10 and improve the sound quality performance of the speaker 10 under normal conditions.

[0078] Furthermore, it also helps to reduce the driving force requirement, which in turn helps to improve the sensitivity of the speaker 10.

[0079] In addition, it helps to improve the problem of insufficient mechanical strength of a single foam surround, which in turn helps to improve the working durability and service life of the speaker 10.

[0080] like Figures 3 to 6 As shown, in some embodiments, the loudspeaker 10 further includes a voice coil 200 and a frame 500. The voice coil 200 and the diaphragm 110 are disposed within the frame 500. The inner edge of the diaphragm 110 is connected to the voice coil 200. The end of the second surround 130 away from the first surround 120 is connected to the frame 500.

[0081] 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. When an audio current passes through the voice coil 200, it generates a magnetic field that changes with the current. This changing magnetic field interacts with the fixed magnetic field of the magnetic circuit system within the loudspeaker 10, driving the voice coil 200 to reciprocate. The diaphragm 110 is connected to the outer wall of the voice coil 200. When the voice coil 200 reciprocates, it directly drives the diaphragm 110 to vibrate, and the diaphragm 110 generates sound waves by pushing air.

[0082] The speaker frame 500 is a rigid load-bearing structure for the loudspeaker 10 and can provide 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, diaphragm 110, first surround 120, and second surround 130 can be improved.

[0083] Optionally, such as 3 to Figure 6 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.

[0084] The centering support 600 is used to limit the radial displacement of the voice coil 200, ensuring its free vibration along the axial direction. The centering support 600, the first surround 120, and the second surround 130 together constitute the suspension system of the loudspeaker 10.

[0085] The magnetic circuit system of the loudspeaker 10 is primarily composed of pole piece 700, magnet 800, and U-shaped iron 900. The pole piece 700 and 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 inserted into this air gap without contacting either 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. This magnetic field is 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 in reciprocating motion.

[0086] 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 diaphragm assembly, characterized in that, include: Diaphragm; A first folded ring and a second folded ring, wherein the first folded ring is connected to the outer edge of the diaphragm, and the second folded ring is connected to the first folded ring and located on the side of the first folded ring away from the diaphragm; Of the two folds, one is a foam fold and the other is a rubber fold.

2. The diaphragm assembly according to claim 1, characterized in that, The first folded ring is bonded to the diaphragm; And / or, the second fold ring and the first fold ring are bonded together.

3. The diaphragm assembly according to claim 1, characterized in that, The first fold and the second fold have the same radial width; And / or, the first fold and the second fold have the same thickness.

4. The diaphragm assembly according to claim 1, characterized in that, The first fold ring has a first protrusion extending circumferentially and a first connecting portion and a second connecting portion disposed on opposite sides of the first protrusion. The second fold ring has a second protrusion extending in the circumferential direction and a third connecting portion and a fourth connecting portion disposed on opposite sides of the second protrusion; The first connecting part is connected to the edge of the diaphragm, and the second connecting part is connected to the third connecting part.

5. The diaphragm assembly according to claim 4, characterized in that, The first protrusion and the second protrusion have the same shape.

6. The diaphragm assembly according to claim 4, characterized in that, The first protrusion and the second protrusion have the same or opposite protrusion directions.

7. The diaphragm assembly according to claim 6, characterized in that, Both the first protrusion and the second protrusion protrude toward the side away from the diaphragm, or both the first protrusion and the second protrusion protrude toward the side closer to the diaphragm.

8. The diaphragm assembly according to claim 6, characterized in that, One of the first protrusion and the second protrusion protrudes toward the side away from the diaphragm, and the other protrudes toward the side closer to the diaphragm.

9. A loudspeaker, characterized in that, Includes the diaphragm assembly as described in any one of claims 1 to 8.

10. The loudspeaker according to claim 9, characterized in that, It also includes a voice coil and a frame, wherein the voice coil and the diaphragm are disposed within the frame; The inner edge of the diaphragm is connected to the voice coil, and the end of the second surround away from the first surround is connected to the frame.

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