sound production unit

Abstract

The utility model discloses a sound unit, including body and mesh cover, be equipped with through -hole on the body, the mesh cover is located the part area of through -hole on the body and covers, the mesh cover includes at least one first baffle, the rim of first baffle is equipped with first gap, and the first gap intercommunication through -hole forms first air hole. This sound unit can more effectively isolate small particle size sound absorption particle, and the dual needs of process feasibility and acoustic performance promotion are taken into account.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular to a sound generating unit. Background Technology

[0002] Sound generator units are widely used in portable electronic devices such as mobile phones, laptops, and hearing aids. Current sound generator unit designs generally use a diaphragm as a vibrating component to drive air to produce sound. Due to the limited volume of the rear cavity of the sound generator module, the low-frequency response of existing sound generator modules is insufficient, resulting in poor listening experience. To solve this problem, the industry usually fills the rear cavity of the sound generator module with sound-absorbing particles to increase the virtual rear cavity, thereby reducing the F0 and improving low-frequency sensitivity.

[0003] With the same rear cavity volume, the smaller the particle size of the sound-absorbing particles, the more sound-absorbing particles can be poured into the rear cavity, and the larger the total surface area of ​​the sound-absorbing particles poured into the rear cavity, thus significantly increasing the virtual rear cavity and reducing F0. Reducing the particle size of the sound-absorbing particles requires a reduction in the aperture of the vent holes in the mesh cover on the magnetic cover of the sound-generating unit; otherwise, the sound-absorbing particles could pass through the vent holes and enter the interior of the sound-generating unit, affecting its normal sound production. However, due to limitations in stamping technology, it is currently impossible to stamp out vent holes of smaller size, which undoubtedly limits the reduction in the particle size of the sound-absorbing particles. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a sound-generating unit that can more effectively isolate small-diameter sound-absorbing particles.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sound-generating unit, comprising:

[0006] The body has a through hole;

[0007] A mesh cover is disposed on the body and covers a portion of the through hole. The mesh cover includes at least one first baffle, the edge of which is provided with a first notch, which communicates with the through hole to form a first vent hole.

[0008] In one embodiment, the mesh cover includes a plurality of first baffles arranged in a row.

[0009] In one embodiment, two first baffles that are close to each other are in contact with each other, and the openings of the first notches on each of the first baffles face the same direction.

[0010] In one embodiment, the mesh cover further includes a plurality of second baffles arranged in a row, the edges of the second baffles having second notches, the second notches communicating with the through holes to form second ventilation holes.

[0011] In one embodiment, the first baffle and the second baffle in the mesh cover are staggered, and the opening of the first notch on the first baffle is aligned with the opening of the second notch on the adjacent second baffle, so that the side of the first vent hole is connected to the side of the second vent hole.

[0012] In one embodiment, the first baffle in the mesh is mirror-symmetrical to the second baffle adjacent to it.

[0013] In one embodiment, there are multiple through holes, and each through hole is provided with a corresponding mesh cover.

[0014] In one embodiment, the through hole is located on the bottom surface, side surface, or the junction of the bottom surface and side surface of the body.

[0015] In one embodiment, the body has a magnetic shield, the through hole is located on the magnetic shield, and the mesh cover is disposed on the magnetic shield.

[0016] In one embodiment, the bottom surface of the magnetic cover has a pressure groove, and the mesh cover is installed in the pressure groove.

[0017] The beneficial effects of this utility model are as follows:

[0018] Given the limitations of existing sound-generating units in terms of stamping processes, which restrict the reduction of pore size and the resulting contradiction between reducing the particle size of sound-absorbing particles and ensuring reliable isolation, this sound-generating unit addresses this issue by stacking a mesh cover over the through-hole area of ​​the main body, partially covering the through-hole with at least one first baffle, and then creating a first notch along the edge of the first baffle. This first notch, together with the through-hole, forms a first vent. This approach maintains the small notch size achievable through stamping on a macroscopic level while transforming the effective ventilation channel of the vent from a directly formed circular cross-section to a narrow slit-like cross-section combining a notch and a through-hole on a microscopic level. The projected area of ​​the slit cross-section perpendicular to the airflow direction is significantly smaller than the area of ​​a circular hole that can be stamped under the same process, yet it can maintain a considerable amount of air permeability. Thus, without breaking the limits of existing stamping processes, the vent holes physically isolate the sound-absorbing particles with smaller particle sizes, allowing the rear cavity of the sound-generating module to be filled with sound-absorbing particles with smaller particle sizes and larger specific surface areas. The virtual rear cavity volume is thus expanded, F0 is further reduced, and low-frequency sensitivity is significantly improved. Ultimately, without increasing the overall thickness and cost, the low-frequency sound of portable electronic devices is improved, taking into account both the feasibility of the process and the improvement of acoustic performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a partial exploded view of the sound-generating unit in Embodiment 1;

[0021] Figure 2 This is a bottom view of the sound-generating unit in Embodiment 1;

[0022] Figure 3 For along Figure 2 Sectional view of line AA in the middle;

[0023] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0024] Figure 5 This is a partial area of ​​a cross-sectional view of the sound-generating unit in Embodiment 2;

[0025] Figure 6 This is a bottom view of the mesh cover in the sound-generating unit of Embodiment 2.

[0026] Explanation of icon numbers:

[0027] 1. Body; 11. Frame; 12. Diaphragm assembly; 13. Magnetic cover; 131. Through hole; 132. Pressure groove; 14. Side magnetic assembly;

[0028] 2. Net cover; 21. First baffle; 211. First opening; 22. Second baffle; 221. Second opening;

[0029] 3. First vent;

[0030] 4. Second vent. Detailed Implementation

[0031] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0035] Furthermore, if the meaning of "and / or" in the entire text is to include three parallel solutions, taking "and A / or B" as an example, it includes solution A, solution B, and a solution that simultaneously satisfies both A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] Example 1

[0038] Please refer to Figures 1 to 4 One embodiment of this utility model is: a sound-generating unit, including a body 1 and a mesh cover 2. The body 1 is provided with a through hole 131, which is located on the bottom surface, side surface, or the junction of the bottom surface and side surface of the body 1. The mesh cover 2 is disposed on the body 1 and covers a part of the through hole 131. The mesh cover 2 includes at least one first baffle 21. The edge of the first baffle 21 is provided with a first notch 211, which communicates with the through hole 131 to form a first vent hole 3.

[0039] Specifically, the body 1 includes a voice coil, a frame 11, and a magnetic circuit assembly and a diaphragm assembly 12 respectively connected to the frame 11. The voice coil is connected to the diaphragm assembly 12. The magnetic circuit assembly includes a magnetic cover 13 and a center magnetic assembly and a side magnetic assembly 14 respectively disposed on the magnetic cover 13. A magnetic gap is formed between the center magnetic assembly and the side magnetic assembly 14 for the voice coil to move. The center magnetic assembly includes a center magnet and a center washer. The center magnet is connected to the center washer and the magnetic cover 13. The side magnetic assembly 14 includes a side magnet and a side washer. The side magnet is connected to the side washer and the magnetic cover 13. In some embodiments, the side washer is connected to the frame 11.

[0040] When the through hole 131 is located on the side of the body 1, the through hole 131 is located on the basin frame 11, the side magnetic assembly 14, or the magnetic cover 13 with a flange; when the through hole 131 is located on the bottom surface of the body 1, the through hole 131 is located on the magnetic cover 13; when the through hole 131 is located at the junction of the bottom surface and the side surface of the body 1, the through hole 131 is located on the magnetic cover 13 with a flange. It should be noted that this description only reveals some feasible ways of setting the through hole 131, and does not mean that the through hole 131 can only have the settings listed above.

[0041] In one or more embodiments, the number of through holes 131 is multiple, and each through hole 131 is correspondingly provided with the mesh cover 2. In this embodiment, the magnetic cover 13 is flat and does not have flanges. The through holes 131 are located on the magnetic cover 13, and the mesh cover 2 is provided on the magnetic cover 13. The four corner areas of the magnetic cover 13 are respectively provided with the through holes 131.

[0042] In detail, the mesh cover 2 includes a plurality of first baffles 21, and the plurality of first baffles 21 are arranged in a row, that is, a single through hole 131 can divide into a plurality of first ventilation holes 3.

[0043] In one or more embodiments, the mesh cover 2 further includes a plurality of second baffles 22 arranged in a row. Each second baffle 22 has a second notch 221 along its edge, which connects to the through hole 131 to form a second vent 4. In other words, a single through hole 131 can divide into multiple first vent 3s. In this embodiment, the first baffles 21 and second baffles 22 in the mesh cover 2 are staggered. The opening of the first notch 211 on the first baffle 21 aligns with the opening of the second notch 221 on the adjacent second baffle 22, so that the side of the first vent 3 communicates with the side of the second vent 4. This communication forms a larger diameter vent hole, ensuring smooth airflow to the inside and outside of the sound-generating unit and blocking small-diameter sound-absorbing particles.

[0044] It should be noted that, Figure 4 The dotted lines are only for more clearly identifying the first vent 3 and the second vent 4; the actual product does not have lines corresponding to these dotted lines.

[0045] The shape of the first notch 211 can be semi-circular, semi-elliptical, or polygonal. Similarly, the shape of the first notch 211 can be semi-circular, semi-elliptical, or polygonal. The shape of the first notch 211 and the shape of the second notch 221 can be the same or different, and can be set as needed. In this embodiment, both the first notch 211 and the second notch 221 are rectangular.

[0046] In a preferred embodiment, the first baffle 21 and the adjacent second baffle 22 in the mesh cover 2 are mirror-symmetrical, that is, the first baffle 21 and the second baffle 22 have the same structure and belong to the same material. This can save the mold opening cost of stamping mold and the storage cost of material.

[0047] The mesh cover 2 is made of plastic or metal. When the mesh cover 2 is made of plastic, it is bonded or heat-fused to the body 1. When the mesh cover 2 is made of metal, it is welded or bonded to the body 1.

[0048] To keep the sound-generating unit thin, the bottom surface of the magnetic cover 13 has a pressure groove 132, and the mesh cover 2 is installed in the pressure groove 132.

[0049] The thickness of the mesh cover 2 can be designed differently depending on the size of the sound-generating unit product. Preferably, the thickness of the mesh cover 2 is 0.05mm-0.5mm. In this embodiment, the thickness of the mesh cover 2 is 0.1mm.

[0050] Example 2

[0051] Please refer to Figure 5 and Figure 6 Embodiment 2 of this utility model is a parallel technical solution to Embodiment 1. The difference between Embodiment 1 and Embodiment 2 is that in this embodiment, the two first baffles 21 that are close to each other in the mesh cover 2 of the sound-emitting unit are in contact with each other, and the openings of the first notches 211 on each of the first baffles 21 face the same direction. That is, the mesh cover 2 does not have a second baffle like in Embodiment 1.

[0052] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A sound-generating unit, characterized in that: include The body has a through hole; A mesh cover is disposed on the body and covers a portion of the through hole. The mesh cover includes at least one first baffle, the edge of which is provided with a first notch, which communicates with the through hole to form a first vent hole.

2. The sound-generating unit according to claim 1, characterized in that: The mesh cover includes a plurality of first baffles, and the plurality of first baffles are arranged in a row.

3. The sound-generating unit according to claim 2, characterized in that: Two first baffles that are close to each other come into contact with each other, and the openings of the first notches on each first baffle face the same direction.

4. The sound-generating unit according to claim 2, characterized in that: The mesh cover also includes multiple second baffles, which are arranged in a row. The edges of the second baffles are provided with second notches, which are connected to the through holes to form second ventilation holes.

5. The sound-generating unit according to claim 4, characterized in that: In the mesh cover, the first baffle and the second baffle are staggered, and the opening of the first notch on the first baffle is aligned with the opening of the second notch on the adjacent second baffle, so that the side of the first vent hole is connected to the side of the second vent hole.

6. The sound-generating unit according to claim 5, characterized in that: The first baffle in the mesh is mirror-symmetrical to the second baffle adjacent to it.

7. The sound-generating unit according to claim 1, characterized in that: The number of through holes is multiple, and each through hole is provided with a corresponding mesh cover.

8. The sound-generating unit according to claim 1, characterized in that: The through hole is located on the bottom surface, side surface, or the junction of the bottom surface and side surface of the body.

9. The sound-generating unit according to claim 1, characterized in that: The body has a magnetic cover, the through hole is located on the magnetic cover, and the mesh cover is provided on the magnetic cover.

10. The sound-generating unit according to claim 9, characterized in that: The bottom surface of the magnetic cover has a pressure groove, and the mesh cover is installed in the pressure groove.

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