sound production unit

Abstract

This utility model discloses a sound-generating unit, including a body and a mesh cover. The body has a first through hole; the mesh cover is disposed on the body and has a second through hole. Along the depth direction of the first through hole, the first through hole and the second through hole are partially misaligned, and the overlapping area of ​​the first through hole and the second through hole forms a vent. Given that existing sound-generating units are limited by the stamping process, which prevents further reduction in the vent diameter and makes it difficult to balance the reduction of sound-absorbing particle size with reliable isolation, this sound-generating unit addresses this by partially misaligning the first through hole of the body and the second through hole of the mesh cover along the axial direction. This makes the vent formed by the overlapping of the two holes a slit-like channel. Its effective vent diameter is smaller than both the first and second through hole diameters, thus reliably blocking smaller sound-absorbing particles without exceeding the stamping limits, preventing them from entering the sound-generating unit and causing abnormal noise or failure.

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 first through hole;

[0007] A mesh cover, which is disposed on the body, and has a second through hole;

[0008] Along the depth direction of the first through hole, the first through hole and the second through hole are partially misaligned, and the overlapping area of ​​the first through hole and the second through hole forms a vent hole.

[0009] In one embodiment, the body has several ventilated areas, each ventilated area having multiple first through holes, and a first partition rib is formed between two adjacent first through holes.

[0010] In one embodiment, a plurality of the first through holes are arranged in at least one row.

[0011] In one embodiment, there are multiple mesh covers, each mesh cover corresponding to at least one of the ventilation zones.

[0012] In one embodiment, the mesh cover is provided in a one-to-one correspondence with the ventilation area.

[0013] In one embodiment, the mesh cover is provided with a plurality of second through holes, and a second partition rib is formed between two adjacent second through holes. Along the depth direction of the first through hole, the first partition rib and the second partition rib are partially or completely misaligned.

[0014] In one embodiment, along the depth direction of the first through hole, the edge of the first through hole obscures a portion of the second through hole; and / or, along the depth direction of the first through hole, the edge of the second through hole obscures a portion of the first through hole.

[0015] In one embodiment, the first through hole is located on the bottom surface, side surface, or the junction of the bottom surface and side surface of the body.

[0016] In one embodiment, the body has a magnetic shield, the first through hole is located on the magnetic shield, and the mesh cover is disposed on the magnetic shield.

[0017] In one embodiment, the bottom surface of the magnetic cover has a pressure groove, and the mesh cover is installed in the pressure groove.

[0018] The beneficial effects of this utility model are as follows:

[0019] Given the limitations of existing sound-generating units in terms of stamping processes, which prevent further reduction in the pore size and thus hinder the balance between reducing the particle size of sound-absorbing particles and ensuring reliable isolation, this sound-generating unit addresses this issue by partially misaligning the first through-hole in the main body and the second through-hole in the mesh cover along the axial direction. This creates a slit-like channel through which the two holes overlap, with an effective pore size smaller than both the first and second through-holes. This allows for reliable blocking of even smaller sound-absorbing particles without exceeding the stamping limits, preventing them from entering the sound-generating unit and causing abnormal noise or malfunction.

[0020] This sound unit allows for the placement of more and smaller sound-absorbing particles within the same rear cavity volume, significantly expanding the virtual rear cavity and reducing F0, thereby improving low-frequency sensitivity and listening experience. It does not require additional complex processes or expensive materials, combining cost advantages and manufacturing feasibility, and provides a practical and scalable solution for achieving better low-frequency acoustic performance in portable electronic devices. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a partial exploded view of the sound-generating unit in Embodiment 1;

[0023] Figure 2 This is a bottom view of the sound-generating unit in Embodiment 1;

[0024] Figure 3 For along Figure 2 Sectional view of line AA in the middle;

[0025] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0026] Figure 5 This is a cross-sectional view of the sound-generating unit in Embodiment 2.

[0027] Explanation of icon numbers:

[0028] 1. Body; 11. Sink frame; 12. Diaphragm assembly; 13. Magnetic cover; 131. First through hole; 132. Ventilation zone; 133. First partition rib; 134. Pressure groove; 14. Side magnetic assembly;

[0029] 2. Mesh cover; 21. Second through hole; 22. Second dividing rib;

[0030] 3. Ventilation holes. 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 as follows: a sound-generating unit includes a body 1 and a mesh cover 2. The body 1 has a first 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 has a second through hole 21. Along the depth direction of the first through hole 131, the first through hole 131 and the second through hole 21 are partially misaligned, and the overlapping area of ​​the first through hole 131 and the second through hole 21 forms a vent hole 3. It is easy to understand that the depth direction of the first through hole 131 is the through direction of the first through hole 131. Projecting the sound-generating unit along the depth direction of the first through hole 131, the vent hole 3 is the area where the first through hole 131 and the second through hole 21 overlap. Figure 4 The area between the two dashed lines shown.

[0039] In one or more embodiments, along the depth direction of the first through hole 131, the edge of the first through hole 131 blocks a portion of the second through hole 21; and / or, along the depth direction of the first through hole 131, the edge of the second through hole 21 blocks a portion of the first through hole 131.

[0040] 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.

[0041] When the first through hole 131 is located on the side of the body 1, the first 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 first through hole 131 is located on the bottom surface of the body 1, the first through hole 131 is located on the magnetic cover 13; when the first through hole 131 is located at the junction of the bottom surface and the side surface of the body 1, the first 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 first through hole 131, and does not mean that the first through hole 131 only has the settings listed above.

[0042] In this embodiment, the magnetic cover 13 is flat and does not have a flange. The first through hole 131 is located on the magnetic cover 13, and the mesh cover 2 is disposed on the magnetic cover 13.

[0043] The body 1 has a plurality of breathable zones 132, each breathable zone 132 having a plurality of first through holes 131, and a first separating rib 133 being formed between two adjacent first through holes 131; in the breathable zone 132, the plurality of first through holes 131 are arranged in at least one row.

[0044] The number of mesh covers 2 is multiple, and each mesh cover 2 corresponds to at least one of the ventilation areas 132. In some embodiments, the mesh covers 2 and the ventilation areas 132 are arranged in a one-to-one correspondence. In this embodiment, the four corners of the magnetic cover 13 each have a ventilation area 132, and each ventilation area 132 has a corresponding mesh cover 2.

[0045] Optionally, the mesh cover 2 is provided with a plurality of second through holes 21, and a second separating rib 22 is formed between two adjacent second through holes 21. Along the depth direction of the first through hole 131, the first separating rib 133 and the second separating rib 22 are partially misaligned.

[0046] The shape of the first through hole 131 can be circular, elliptical or polygonal. Similarly, the shape of the second through hole 21 can be circular, elliptical or polygonal. The shape of the first through hole 131 and the shape of the second through hole 21 can be the same or different. The specific shape can be set as needed. In this embodiment, both the first through hole 131 and the second through hole 21 are rectangular holes.

[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 134, and the mesh cover 2 is installed in the pressure groove 134.

[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 The second embodiment of this utility model is a parallel technical solution to the first embodiment. The difference between the two embodiments is that the first partition rib 133 and the second partition rib 22 are completely misaligned along the depth direction of the first through hole 131.

[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 first through hole; A mesh cover, which is disposed on the body, and has a second through hole; Along the depth direction of the first through hole, the first through hole and the second through hole are partially misaligned, and the overlapping area of ​​the first through hole and the second through hole forms a vent hole.

2. The sound-generating unit according to claim 1, characterized in that: The body has several ventilated areas, each ventilated area having multiple first through holes, and a first partition rib is formed between two adjacent first through holes.

3. The sound-generating unit according to claim 2, characterized in that: The number of first through holes is arranged in at least one row.

4. The sound-generating unit according to claim 2, characterized in that: The number of mesh covers is multiple, and each mesh cover is provided corresponding to at least one of the ventilation zones.

5. The sound-generating unit according to claim 3, characterized in that: The mesh cover is set one-to-one with the ventilation zone.

6. The sound-generating unit according to claim 2, characterized in that: The mesh cover is provided with a plurality of second through holes, and a second partition rib is formed between two adjacent second through holes. Along the depth direction of the first through hole, the first partition rib and the second partition rib are partially or completely misaligned.

7. The sound-generating unit according to claim 1, characterized in that: Along the depth direction of the first through hole, the edge of the first through hole obscures a portion of the second through hole; and / or, along the depth direction of the first through hole, the edge of the second through hole obscures a portion of the first through hole.

8. The sound-generating unit according to claim 1, characterized in that: The first 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 first through hole is located on the magnetic cover, and the mesh cover is disposed 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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