Low-frequency vibrating diaphragm assembly

Abstract

The utility model relates to a low-frequency vibrating diaphragm assembly, and belongs to the technical field of vibrating diaphragm manufacturing, the low-frequency vibrating diaphragm assembly comprises a low-frequency vibrating diaphragm and a vibrating diaphragm supporting structure, the low-frequency vibrating diaphragm comprises a central part, a folding ring part and an edge part, the periphery of the edge part is outwards provided with bosses at intervals, and the bosses are provided with through positioning holes; a mounting area is formed in the central area of the vibrating diaphragm supporting structure, a partition plate is arranged on the vibrating diaphragm supporting structure around the mounting area in a protruding mode, and containing grooves used for containing the bosses are formed in the partition plate at intervals; a positioning column is convexly arranged at a position, in the accommodating groove, on the vibrating diaphragm supporting structure; and a bonding surface for bonding and fixing the low-frequency vibrating diaphragm is formed between the partition plate and the edge of the mounting area. The mounting positions of the low-frequency vibrating diaphragm and the vibrating diaphragm supporting structure can be quickly matched, and the production efficiency is improved; meanwhile, the low-frequency vibrating diaphragm can be fixed through certain tensile force generated by the positioning columns, micro displacement and deformation of the low-frequency vibrating diaphragm in the bonding process are reduced, distortion is reduced, and the tone quality is improved.

Description

Technical Field

[0001] This application relates to the field of diaphragm manufacturing technology, and in particular to a low-frequency diaphragm assembly. Background Technology

[0002] The diaphragm is a core component in acoustic devices such as loudspeakers, microphones, and headphones. It is responsible for converting electrical signals into mechanical vibrations to produce sound. Low-frequency diaphragms are mainly used in scenarios where efficient reproduction or control of low-frequency sound waves is required. The structure of low-frequency diaphragms is specially designed based on the traditional diaphragm to take into account low-frequency characteristics (such as large amplitude, energy transfer efficiency, and long stroke).

[0003] Low-frequency diaphragm assemblies mainly consist of a low-frequency diaphragm made of elastic material and a diaphragm support structure for supporting the diaphragm. They may also include tuning weights for balancing or adjusting the frequency. The low-frequency diaphragm, diaphragm support structure, and tuning weights are generally fixed and coupled through precision assembly, adhesive, screws, or other methods to ensure vibration transmission efficiency and maintain the stability of the overall structure.

[0004] Currently, low-frequency diaphragm components can effectively optimize low-frequency response characteristics and improve the acoustic performance of products through the coordinated action of mass, elasticity, and damping. However, during the manufacturing process, the lack of an effective limiting structure between the low-frequency diaphragm and the diaphragm support structure often leads to assembly precision defects, resulting in low production efficiency and reduced yield (especially when the low-frequency diaphragm size is too large). Secondly, because the low-frequency diaphragm is made of soft rubber and has a certain weight, after the low-frequency diaphragm is glued to the diaphragm support structure, the low-frequency diaphragm will undergo micro-displacement and deformation during the curing process, causing an imbalance in the prestress distribution of the low-frequency diaphragm, thereby affecting the sound quality. Utility Model Content

[0005] In order to quickly match the position of the low-frequency diaphragm and the diaphragm support structure, improve production efficiency, reduce the micro-displacement and deformation of the low-frequency diaphragm after bonding, and improve sound quality, this application provides a low-frequency diaphragm assembly.

[0006] The low-frequency diaphragm assembly provided in this application adopts the following technical solution:

[0007] A low-frequency diaphragm assembly includes a low-frequency diaphragm made of elastic material and a diaphragm support structure for supporting the low-frequency diaphragm. The low-frequency diaphragm includes a central portion located in a central region, a folded ring portion surrounding and connected to the outer periphery of the central portion, and an edge portion surrounding and connected to the outer periphery of the folded ring portion. Bosses are spaced outwardly on the outer periphery of the edge portion, and through positioning holes are formed on the bosses in a direction perpendicular to the low-frequency diaphragm. The diaphragm support structure has a mounting area in the central region for mounting the low-frequency diaphragm. A partition plate protrudes from the diaphragm support structure around the mounting area, and receiving grooves for accommodating the bosses are spaced out on the partition plate. Positioning posts protrude from the diaphragm support structure at positions within the receiving grooves for inserting into the positioning holes. An adhesive surface for bonding and fixing the edge portion of the low-frequency diaphragm is formed between the partition plate and the edge of the mounting area.

[0008] By adopting the above technical solution, positioning holes and positioning posts are set at corresponding positions on the low-frequency diaphragm and diaphragm support structure, and with the limiting effect of the partition plate, a nested fit is formed to assist in rapid alignment. This allows for quick matching of the installation positions of the low-frequency diaphragm and diaphragm support structure, improving production efficiency. Furthermore, the positioning posts can exert a certain tensile force to fix the low-frequency diaphragm, reducing micro-displacement and deformation of the low-frequency diaphragm during bonding, adjusting the effective mass distribution of the low-frequency diaphragm, ensuring stable center of gravity during vibration, avoiding off-axis oscillation (improving sound quality consistency), reducing distortion, and improving sound quality.

[0009] Optionally, the central region of the low-frequency diaphragm extends to a certain thickness on the side facing the low-frequency diaphragm, and the thickness of the central region is greater than the thickness of the edge region of the central region.

[0010] By adopting the above technical solution, increasing the thickness of the central region can moderately improve the rigidity of this part, reduce segmentation vibration, and increase high-frequency extension and stability.

[0011] Optionally, the low-frequency diaphragm assembly may also include a tuning weight for balancing or adjusting the frequency.

[0012] Optionally, the tuning counterweight is glued and fixed to the center of the front side of the low-frequency diaphragm.

[0013] Optionally, the front side of the low-frequency diaphragm forms a groove-shaped transition region between the edge region of the central part and the folded ring part; the outer periphery of the tuning counterweight extends towards the transition region with a folded edge, which is glued and fixed in the transition region.

[0014] By adopting the above technical solution, the tuning counterweight is an additional mass on the low-frequency diaphragm. It adjusts the acoustic performance of the acoustic device by changing the mass parameters of the low-frequency diaphragm, such as balancing the reaction force when the low-frequency diaphragm vibrates and reducing system distortion.

[0015] Optionally, an annular anti-overflow rib is provided on the bonding surface of the diaphragm support structure protruding towards the opposite side of the diaphragm support structure; a slot for inserting the anti-overflow rib is provided on the edge of the low-frequency diaphragm.

[0016] Optionally, an overflow groove is provided on the bonding surface of the diaphragm support structure facing the front of the diaphragm support structure; the anti-overflow rib is located on the outer side of the bonding surface, and the overflow groove is located on the inner side of the bonding surface.

[0017] By adopting the above technical solution, the inner overflow groove and the outer anti-overflow rib have a dual function. The overflow groove reserved in the structure guides the excess glue on the bonding surface to drain into the overflow groove, thereby ensuring that the bonding surface retains a reasonable amount of glue to maintain the bonding strength. The reserved anti-overflow rib covers the side of the bonding surface to prevent excess glue from overflowing from the outside and avoid causing poor appearance.

[0018] Optionally, the low-frequency diaphragm is made of silicone material.

[0019] Optionally, the low-frequency diaphragm is made of rubber material.

[0020] Optionally, there are six bosses and six corresponding receiving slots.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. First, by setting positioning holes and positioning posts at corresponding positions on the low-frequency diaphragm and diaphragm support structure, and with the limiting effect of the partition plate, a nested fit is formed to assist in rapid alignment. This allows for quick matching of the installation positions of the low-frequency diaphragm and diaphragm support structure, improving production efficiency. At the same time, the positioning posts can exert a certain tensile force to fix the low-frequency diaphragm, reducing micro-displacement and deformation of the low-frequency diaphragm during the bonding process, adjusting the effective mass distribution of the low-frequency diaphragm, ensuring the stability of the center of gravity during vibration, avoiding off-axis oscillation (improving sound quality consistency), reducing distortion, and improving sound quality.

[0023] 2. Secondly, the inner overflow groove and the outer anti-overflow rib serve a dual purpose. The overflow groove, which is pre-reserved in the structure, guides excess glue from the bonding surface to drain into the overflow groove, thereby ensuring that the bonding surface retains a reasonable amount of glue to maintain the bonding strength. The anti-overflow rib covers the side of the bonding surface to prevent excess glue from overflowing from the outside and avoid causing poor appearance. Attached Figure Description

[0024] Figure 1 This is a front structural schematic diagram of a low-frequency diaphragm assembly according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the reverse structure of a low-frequency diaphragm assembly according to an embodiment of this application;

[0026] Figure 3 This is an exploded view of the front structure of a low-frequency diaphragm assembly according to an embodiment of this application;

[0027] Figure 4 This is an exploded view of the reverse structure of a low-frequency diaphragm assembly according to an embodiment of this application;

[0028] Figure 5 This is a reverse structural cross-sectional view of a low-frequency diaphragm assembly according to an embodiment of this application;

[0029] Figure 6 yes Figure 5 Enlarged schematic diagram of part A in the middle.

[0030] Explanation of reference numerals in the attached drawings: 1. Low-frequency diaphragm; 11. Central part; 12. Folded ring part; 13. Edge part; 131. Boss; 1311. Positioning hole; 132. Slot; 14. Transition part; 2. Diaphragm support structure; 21. Mounting area; 22. Partition plate; 221. Receiving groove; 2211. Positioning post; 23. Adhesive surface; 231. Anti-overflow rib; 232. Glue overflow groove; 3. Tuning counterweight; 31. Folded edge. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 6 This application will be described in further detail.

[0032] A low-frequency diaphragm assembly, as described above Figure 1 , Figure 2 It includes a low-frequency diaphragm 1 made of elastic material and a diaphragm support structure 2 for supporting the low-frequency diaphragm 1.

[0033] Combination Figure 2 , Figure 3 The low-frequency diaphragm 1 is made of silicone, rubber or other similar materials, and has a lower resonant frequency F0. It has lower nonlinear distortion at the same sound pressure level and performs well in low frequencies.

[0034] The low-frequency diaphragm 1 has a plate-like overall shape and can be designed using a diaphragm support or an integrated housing. It includes a central portion 11 located in the central region, a folded ring portion 12 surrounding and connected to the outer periphery of the central portion 11, and an edge portion 13 surrounding and connected to the outer periphery of the folded ring portion 12. The outer periphery of the edge portion 13 is provided with protrusions 131 spaced outwards. There are four, six, or eight protrusions 131 located on both sides of the protrusions 131. A through positioning hole 1311 is formed on the protrusions 131 in a direction perpendicular to the low-frequency diaphragm 1.

[0035] The diaphragm support structure 2 is plate-shaped, with a mounting area 21 in the central region for mounting the low-frequency diaphragm 1. The mounting area 21 facilitates the assembly and alignment of the low-frequency diaphragm 1 and can also partially reduce the weight of the diaphragm support structure 2. On the reverse side of the diaphragm support structure 2, a partition 22 protrudes around the mounting area 21, and receiving grooves 221 for accommodating bosses 131 are provided at intervals on the partition 22. Positioning posts 2211 protrude from the diaphragm support structure 2 at positions in the receiving grooves 221 for inserting into positioning holes 1311. An adhesive surface 23 is formed between the edges of the partition 22 and the mounting area 21 for bonding and fixing the edge portion 13 of the low-frequency diaphragm 1.

[0036] With the above setup, positioning holes 1311 and positioning posts 2211 are respectively set at corresponding positions on the low-frequency diaphragm 1 and the diaphragm support structure 2. In addition, the limiting effect of the partition plate 22 forms a nested fit, which helps to quickly match the installation positions of the low-frequency diaphragm 1 and the diaphragm support structure 2, improving production efficiency. At the same time, the positioning posts 2211 can generate a certain tensile force to fix the low-frequency diaphragm 1, reduce the micro-displacement and deformation of the low-frequency diaphragm 1 during the bonding process, adjust the effective mass distribution of the low-frequency diaphragm 1, ensure the stability of the center of gravity during vibration, avoid off-axis oscillation (improving sound quality consistency), reduce distortion, and improve sound quality.

[0037] In the central region 11 of the low-frequency diaphragm 1, a certain thickness extends from the central region towards the positive direction of the low-frequency diaphragm 1, and the thickness of the central region 11 is greater than the thickness of the edge region of the central region 11. Increasing the thickness of the central region 11 can moderately improve the rigidity of this part; if the low-frequency diaphragm 1 is both large and thin, its strength is too low, and it will exhibit uneven vibration at high frequencies, also known as split vibration, which leads to an increase in the antiphase component, thereby affecting high-frequency fidelity. Therefore, moderately increasing the rigidity of the low-frequency diaphragm 1 can reduce split vibration and increase high-frequency extension and stability.

[0038] Based on the thickening treatment of the central region of the central portion 11; a groove-shaped transition portion 14 is formed on the front side of the low-frequency diaphragm 1 between the edge region of the central portion 11 and the folded ring portion 12; a low-frequency diaphragm assembly also includes a tuning counterweight 3 for balancing or adjusting the frequency, the tuning counterweight 3 being glued and fixed to the central portion 11 on the front side of the low-frequency diaphragm 1, and the outer periphery of the tuning counterweight 3 extending toward the transition portion 14 having a folded edge 31, the folded edge 31 being glued and fixed in the transition portion 14. The tuning counterweight 3 can be made of metal sheet, and the tuning counterweight 3 is an additional mass on the low-frequency diaphragm 1. Its main function is to adjust the acoustic performance of the acoustic device by changing the mass parameters of the low-frequency diaphragm 1, such as balancing the reaction force when the low-frequency diaphragm 1 vibrates and reducing system distortion.

[0039] Combination Figure 5 , Figure 6In actual production, the current dispensing process is difficult to control precisely. During the bonding process after dispensing, the low-frequency diaphragm 1 and the diaphragm support structure 2 are prone to glue overflow, which leads to problems such as appearance and production defects. In addition, the excess glue cannot be effectively discharged, resulting in an excessively thick glue layer. The peel strength deterioration trend will increase exponentially, leading to a decrease in adhesion durability.

[0040] Therefore, an annular anti-overflow rib 231 is provided on the bonding surface 23 of the diaphragm support structure 2, protruding towards the reverse side of the diaphragm support structure 2; correspondingly, a slot 132 for inserting the anti-overflow rib 231 is provided on the edge portion 13 of the low-frequency diaphragm 1; furthermore, an overflow groove 232 is provided on the bonding surface 23 of the diaphragm support structure 2, facing the front side of the diaphragm support structure 2; the anti-overflow rib 231 is located on the outer side of the bonding surface 23, and the overflow groove 232 is located on the inner side of the bonding surface 23.

[0041] With the above-mentioned configuration, the inner overflow groove 232 and the outer anti-overflow rib 231 serve a dual purpose. The overflow groove 232, which is pre-reserved in the structure, guides excess glue from the bonding surface 23 to drain into the overflow groove 232, thereby ensuring that the bonding surface 23 retains a reasonable amount of glue to maintain the bonding strength. The anti-overflow rib 231, which is pre-reserved, covers the side of the bonding surface 23 to prevent excess glue from overflowing from the outside and avoid causing poor appearance.

[0042] In summary, this application, through the above-mentioned settings, significantly improves the production efficiency of the low-frequency diaphragm 1 component, ensures bonding quality, improves sound quality, and avoids problems such as poor appearance caused by glue overflow.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-frequency diaphragm assembly, comprising a low-frequency diaphragm (1) of elastic material and a diaphragm support structure (2) for supporting the low-frequency diaphragm (1), characterized in that: The low-frequency diaphragm (1) includes a central portion (11) located in the central region, a folded ring portion (12) surrounding and connected to the outer periphery of the central portion (11), and an edge portion (13) surrounding and connected to the outer periphery of the folded ring portion (12). The edge portion (13) has protrusions (131) spaced outward on its outer periphery, and a through positioning hole (1311) is formed on the protrusion (131) in a direction perpendicular to the low-frequency diaphragm (1). The diaphragm support structure (2) has a mounting area for mounting the low-frequency diaphragm (1) in the central region. (21) A partition (22) is provided protruding around the mounting area (21) on the diaphragm support structure (2), and a receiving groove (221) for accommodating the boss (131) is provided at intervals on the partition (22); a positioning post (2211) for inserting into the positioning hole (1311) is provided protruding at the position in the receiving groove (221) on the diaphragm support structure (2); an adhesive surface (23) for bonding and fixing the edge (13) of the low frequency diaphragm (1) is formed between the edge of the partition (22) and the mounting area (21).

2. The low-frequency diaphragm assembly according to claim 1, characterized in that: The central region of the central part (11) of the low-frequency diaphragm (1) extends to a certain thickness on the side facing the low-frequency diaphragm (1), and the thickness of the central region of the central part (11) is greater than the thickness of the edge region of the central part (11).

3. A low-frequency diaphragm assembly according to claim 2, characterized in that: The low-frequency diaphragm (1) assembly also includes a tuning counterweight (3) for balancing or adjusting the frequency.

4. A low-frequency diaphragm assembly according to claim 3, characterized in that: The tuning counterweight (3) is glued and fixed to the center (11) of the front side of the low-frequency diaphragm (1).

5. A low-frequency diaphragm assembly according to claim 4, characterized in that: The front of the low-frequency diaphragm (1) forms a groove-shaped transition section (14) between the edge region of the central part (11) and the folded ring part (12); the outer periphery of the tuning counterweight (3) extends toward the transition section (14) with a folded edge (31), and the folded edge (31) is glued and fixed in the transition section (14).

6. A low-frequency diaphragm assembly according to claim 1, characterized in that: An annular anti-overflow rib (231) is provided on the bonding surface (23) of the diaphragm support structure (2) protruding towards the opposite side of the diaphragm support structure (2); a slot (132) for inserting the anti-overflow rib (231) is provided on the edge (13) of the low-frequency diaphragm (1).

7. A low-frequency diaphragm assembly according to claim 5, characterized in that: An overflow groove (232) is provided on the bonding surface (23) of the diaphragm support structure (2) facing the front of the diaphragm support structure (2); the anti-overflow rib (231) is located on the outside of the bonding surface (23), and the overflow groove (232) is located on the inside of the bonding surface (23).

8. A low-frequency diaphragm assembly according to claim 1, characterized in that: The low-frequency diaphragm (1) is made of silicone material.

9. A low-frequency diaphragm assembly according to claim 1, characterized in that: The low-frequency diaphragm (1) is made of rubber material.

10. A low-frequency diaphragm assembly according to claim 1, characterized in that: There are six bosses (131) and six corresponding receiving slots (221).

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