Loudspeaker voice coil diaphragm structure

Abstract

The loudspeaker voice coil diaphragm structure provided by the invention has the characteristics that the diaphragm is laminated after being formed in a split manner, and the voice coil framework and the diaphragm are integrally formed, and the complete diaphragm is decomposed into at least two separated diaphragms for forming, so that the requirement on the ductility of a single material is effectively reduced, the process problem of large-angle stretching is avoided, and the production efficiency is improved. A reinforcing structure is naturally formed at the fitting part; the voice coil framework and the vibrating diaphragm body are integrally formed, so that a glue bonding interface is eliminated, the connection reliability and the structural strength are improved, and the vibration quality is reduced; by designing the specific included angle between the skeleton and the neck of the vibrating diaphragm, the vibrating diaphragm assembly with the integrated skeleton is ensured to be smooth and accurate in signal transmission motion in a magnetic circuit. According to the structure, many performance and reliability bottlenecks caused by difficult material forming and a bonding process in a traditional design are fundamentally overcome, and the power bearing capacity, the acoustic performance and the long-term stability of the loudspeaker are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of loudspeakers, and in particular to a loudspeaker voice coil diaphragm structure. Background Technology

[0002] As a core electroacoustic conversion device that converts electrical energy into sound energy, the performance of a loudspeaker directly affects the sound quality, power handling capacity, and lifespan of audio equipment. With the rapid development of consumer electronics, car audio, and professional audio industries, the market demands higher power, lower distortion, longer lifespan, and smaller size from loudspeakers. The diaphragm, as a key component in loudspeaker sound production, has crucial structural and material properties. In traditional loudspeaker design, the diaphragm and the voice coil driving it are typically separate structures, meaning the diaphragm and voice coil frame are manufactured separately and then bonded together using adhesives. This separate bonding process is feasible in small tweeters due to their lightweight structure, but its inherent drawbacks become increasingly apparent in mid-bass speakers that need to withstand higher power and greater mechanical stress.

[0003] Existing problems include: First, most high-performance diaphragm materials (such as special pulp, polymer composites, and metal alloys) have poor ductility, making it impossible to achieve integrated molding of the diaphragm and the complex three-dimensional voice coil skeleton using traditional stamping and stretching processes; forced molding can easily lead to material tearing or uneven thickness in certain areas. Second, when using materials such as pulp for molding, it is difficult to precisely control the thickness of complex-shaped parts with high dimensional accuracy requirements, such as the voice coil skeleton. Furthermore, the voice coil moves like a piston within the narrow magnetic gap of the magnetic circuit system, demanding extremely high dimensional consistency and dynamic balance from the skeleton, making separate manufacturing a necessary compromise to ensure precision. Third, the area of ​​raw materials available for molding the voice coil skeleton is severely limited due to the size of the opening in the center of the speaker diaphragm. Even when using materials with good ductility, their dimensions are insufficient to form a voice coil skeleton of sufficient length, which greatly restricts integrated design and magnetic circuit optimization. The separate adhesive structure itself also has many inherent drawbacks: the adhesive layer adds extra mass, affecting the speaker's transient response and sensitivity; the adhesive may age and fail under long-term vibration and temperature and humidity changes, causing the voice coil and diaphragm to separate and resulting in speaker failure; the presence of the adhesive interface also introduces nonlinear distortion, affecting sound quality.

[0004] Therefore, there is an urgent need in this field for a loudspeaker structure solution that can fundamentally overcome the limitations of materials and processes and achieve reliable and precise integrated molding of the diaphragm and voice coil frame, in order to solve the problems of poor reliability, large added mass, limited performance and difficulty in adapting to high-power applications that exist in traditional separate bonding designs. Summary of the Invention

[0005] The purpose of this invention is to provide a loudspeaker voice coil diaphragm structure to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a loudspeaker voice coil diaphragm structure, including a diaphragm body and a voice coil body. The diaphragm body includes at least two separate diaphragms, which are bonded together to form a complete diaphragm. The voice coil body includes a voice coil skeleton, which is integrally formed with the diaphragm body, and the included angle between the voice coil skeleton and the diaphragm body at the connection point is 75-173°.

[0007] Preferably, adjacent separate diaphragms are integrally bonded together by adding an external complete diaphragm.

[0008] Preferably, the voice coil skeletons are only attached to the portion close to the separated diaphragm, while the remaining portions are not attached and are naturally enclosed.

[0009] Preferably, the joints between two adjacent voice coil frames and between two adjacent separate diaphragms have an interlaced toothed structure.

[0010] Preferably, a reinforcing bonding protrusion is provided at the bonding area between two adjacent voice coil skeletons. The outer dimensions of the reinforcing bonding protrusion are larger than the diameter of the voice coil body, and it extends from the connection point between the voice coil skeleton and the diaphragm body to the winding position on the voice coil skeleton.

[0011] Preferably, the enhanced bonding protrusion is one of the following: an upright fin, an extension of the voice coil skeleton in the same shape, an external patch, or an external complete voice coil skeleton.

[0012] Preferably, the magnetic gap at the outer magnetic guide plate of the enhanced bonding protrusion is larger than the magnetic gap at the non-bonded area.

[0013] Preferably, the cross-section of the voice coil body is elliptical, and the contact point is located at the end of the major axis of the ellipse.

[0014] The present invention also provides an application of a loudspeaker voice coil diaphragm structure in electroacoustic transducers.

[0015] The present invention achieves the following beneficial technical effects compared to the prior art: This invention provides a loudspeaker voice coil diaphragm structure characterized by diaphragm segmentation followed by bonding, and an integral molding of the voice coil frame and diaphragm. By decomposing the complete diaphragm into at least two separate diaphragm segments for molding, the requirements for the ductility of individual materials are effectively reduced, avoiding the technological challenges of large-angle stretching, and allowing the bonding area to naturally form a reinforcing structure. The integral molding of the voice coil frame and diaphragm body eliminates the glue interface, improving connection reliability and structural strength, and reducing vibration mass. By designing a specific angle between the frame and the diaphragm neck, the smooth and precise movement of the diaphragm assembly with the integrated frame in the magnetic circuit is ensured. This structure fundamentally overcomes many performance and reliability bottlenecks caused by the difficulties in material molding and bonding processes in traditional designs, significantly improving the loudspeaker's power handling capacity, acoustic performance, and long-term stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional view of the loudspeaker voice coil diaphragm structure provided by the present invention; Figure 2 This is a cross-sectional view of the speaker voice coil diaphragm structure being bonded together, provided by the present invention. Figure 3 This is a cross-sectional view of the overall bonding of the loudspeaker voice coil diaphragm structure provided by the present invention; Figure 4 This is a cross-sectional view of the overall bonding within the speaker voice coil diaphragm structure provided by the present invention; Figure 5 This is a schematic diagram of the interlaced tooth structure in the speaker voice coil diaphragm structure provided by the present invention. Figure 6 This is a schematic diagram of the elliptical voice coil structure in the loudspeaker voice coil diaphragm structure provided by the present invention. Detailed Implementation

[0018] Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for 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 the invention.

[0019] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The purpose of this invention is to provide a loudspeaker voice coil diaphragm structure that addresses the problems of poor reliability, large added mass, and performance limitations caused by difficulties in material molding inherent in traditional split-type adhesive structures. The core of this structure lies in decomposing the complete diaphragm into multiple separate components, molding them, and then assembling them, achieving integrated manufacturing of the diaphragm and voice coil frame.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1: Please see Figure 1 , 2This diagram shows a cross-sectional view of a basic embodiment of the loudspeaker voice coil diaphragm structure of the present invention. The loudspeaker voice coil diaphragm structure mainly includes a diaphragm body 1 and a voice coil body 2. The diaphragm body 1 is composed of at least two separate diaphragms 11. These separate diaphragms 11 are independently molded and then assembled into a complete, functional diaphragm through a specific bonding method. This piecewise molding method significantly reduces the requirements for the ductility of individual diaphragm components, enabling the manufacture of complex-shaped diaphragm components even from pulp and certain polymer composite materials that are difficult to stretch deeply, through a relatively simple molding process. In particular, it solves the problem of directly and integrally molding the voice coil skeleton in the central neck region of the diaphragm.

[0024] Specifically, the voice coil body 2 includes a voice coil skeleton 21, which is integrally formed with the diaphragm body 1. Specifically, when manufacturing each separate diaphragm 11, its corresponding voice coil skeleton 21 is also formed simultaneously, thus creating a continuous whole in terms of material, completely eliminating the adhesive connection interface between the voice coil skeleton and the diaphragm in traditional structures. This not only improves the reliability and strength of the structure and avoids the risk of glue aging and failure, but also reduces the mass of the vibration system, which is beneficial for improving the sensitivity and transient response of the loudspeaker. The voice coil skeleton 21 extends from the neck region of the diaphragm body 1, and the included angle α at the connection point is designed to be between 75 degrees and 173 degrees. This preferred angle range ensures the efficiency of vibration energy transfer from the voice coil to the diaphragm while also taking into account the spatial layout requirements within the magnetic circuit system.

[0025] In a more specific embodiment, the bonding between adjacent separated diaphragms 11 can take various forms. Please refer to... Figure 3 , 4 In this embodiment, the separate diaphragms 11 are bonded together by a complete diaphragm. It should be understood that the complete diaphragm can be bonded to the inner ring or the outer ring. As long as the bonding between the separate diaphragms can be achieved, it is within the protection scope of this application.

[0026] Furthermore, such as Figure 5 As shown, the joints between two adjacent voice coil frames 21 and between two adjacent separate diaphragms 11 are staggered tooth-like structures.

[0027] Furthermore, after the diaphragm and voice coil frame 21 are assembled, a voice coil wire 22 is wound around the tail end of the voice coil frame 21 (i.e. the end away from the diaphragm) to complete the final fabrication of the voice coil body 2.

[0028] Furthermore, a reinforcing bonding protrusion is provided at the joint between two adjacent voice coil skeletons 21. The outer dimensions of the reinforcing bonding protrusion are larger than the diameter of the voice coil body, and it extends from the connection point between the voice coil skeleton 21 and the diaphragm body 1 to the winding position on the voice coil skeleton. The connection between the parts of the voice coil skeleton 21 can be consistent with the bonding method of the diaphragm, or different methods can be used according to actual needs. For example, in some embodiments, no additional bonding treatment is required between the voice coil skeletons. Instead, after the diaphragm is assembled and closed, it naturally forms a complete cylindrical shape or other desired shape, which we call "natural enclosure without bonding".

[0029] Furthermore, the magnetic gap at the outer magnetic guide plate of the enhanced bonding magnetic circuit is greater than the magnetic gap at the non-bonded area.

[0030] Furthermore, such as Figure 6 As shown, in other embodiments, the cross-section of the diaphragm body 1 and the voice coil body 2 after being enclosed is elliptical, and the fitting position is at the end of the major axis of the ellipse. This can also achieve the above effect, and the shape is more flexible and varied.

[0031] In summary, this invention, through innovative segmented molding and assembly design, cleverly circumvents the stringent requirements of traditional one-piece molding processes on material ductility, and successfully achieves a glue-free integrated structure for the diaphragm and voice coil frame. This not only significantly improves the product's reliability and acoustic performance, but also opens up new avenues for manufacturing high-performance loudspeakers using a wider variety of material systems.

[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] It should be noted that the components mentioned in the above embodiments are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0034] This invention has used specific examples to illustrate its principles and implementation methods. The above descriptions of the embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A loudspeaker voice coil diaphragm structure, comprising a diaphragm body and a voice coil body, characterized in that, The diaphragm body includes at least two separate diaphragms, which are bonded together to form a complete diaphragm; the voice coil body includes a voice coil skeleton, which is integrally formed with the diaphragm body, and the angle between the voice coil skeleton and the diaphragm body at the connection point is 75-173°.

2. The loudspeaker voice coil diaphragm structure according to claim 1, characterized in that, The adjacent separate diaphragms are bonded together by adding an external complete diaphragm.

3. The loudspeaker voice coil diaphragm structure according to claim 2, characterized in that, The voice coil frames are only attached to each other near the separated diaphragm, while the rest are not attached and are naturally enclosed.

4. The loudspeaker voice coil diaphragm structure according to claim 3, characterized in that, The joints between two adjacent voice coil frames and between two adjacent separate diaphragms have an interlaced toothed structure.

5. The loudspeaker voice coil diaphragm structure according to claim 1, characterized in that, The fitting area between two adjacent voice coil skeletons is provided with a reinforcing fitting protrusion. The outer dimensions of the reinforcing fitting protrusion are larger than the diameter of the voice coil body, and it extends from the connection between the voice coil skeleton and the diaphragm body to the winding position on the voice coil skeleton.

6. The loudspeaker voice coil diaphragm structure according to claim 5, characterized in that, The enhanced bonding protrusion is one of the following: standing up the fins, extending the voice coil skeleton in the same shape, adding an external patch, or adding a complete voice coil skeleton.

7. The loudspeaker voice coil diaphragm structure according to claim 1, characterized in that, The magnetic gap at the outer magnetic guide plate of the enhanced bonding protrusion is larger than the magnetic gap at the non-bonded area.

8. The loudspeaker voice coil diaphragm structure according to claim 1, characterized in that, The voice coil body has an elliptical cross-section, and the contact point is located at the end of the major axis of the ellipse.

9. The application of the loudspeaker voice coil diaphragm structure according to any one of claims 1-8, characterized in that, It is used in electroacoustic transducers.

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