Miniature speaker

Abstract

This utility model discloses a miniature loudspeaker, including a voice coil, a support component, a magnetic cover, and a breathable insulating mesh. The support component has an inner mounting portion connected to the lower part of the voice coil. The top surface of the magnetic cover has a pressing edge for avoiding the voice coil and a clearance opening for avoiding the inner mounting portion, with the pressing edge connected to the clearance opening. The breathable insulating mesh is located in the clearance opening and includes a connected body and a folded edge, which is welded to the inner wall of the clearance opening. The bottom surface of the magnetic cover no longer needs a pressing groove as a bonding position, allowing the pressing edge depth to be maximized. This allows for a larger lower vibration space for the voice coil, enabling it to vibrate more significantly and thus improving the performance of the miniature loudspeaker. Only a pressing edge is needed on the magnetic cover, reducing a pressing process. Compared to bonding the breathable insulating mesh to the magnetic cover, the breathable insulating mesh is welded to the magnetic cover in this miniature loudspeaker, resulting in higher bonding strength and better processing precision, while also allowing the miniature loudspeaker to remain thin and lightweight.

Description

Technical Field

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

[0002] Miniature speakers are important acoustic components in portable electronic devices, used to convert electrical signals into sound signals; they are energy conversion devices. A speaker module consists of a module housing and a miniature speaker housed within the housing. With the miniaturization of electronic devices such as mobile phones, the installation space for miniature speakers is becoming increasingly limited. Therefore, more and more speaker modules are choosing to fill the rear cavity with sound-absorbing particles to increase the virtual rear cavity of the speaker module, thereby improving its acoustic performance.

[0003] To prevent sound-absorbing particles in the rear cavity from entering the miniature speaker, existing technology involves creating vents on the magnetic cover of the miniature speaker. A breathable insulating mesh is then attached to these vents to allow ventilation while isolating the sound-absorbing particles. However, attaching the breathable insulating mesh requires adhesive or glue, and the bottom surface of the magnetic cover has a groove along the edge of the vent as a bonding point, thus avoiding increasing the product's height.

[0004] This method of fixing the mesh fabric takes up a lot of space and limits the structural design of the magnet cover. As current miniature loudspeakers become thinner and lighter, in order to increase the lower vibration space of the voice coil (the distance between the voice coil and the magnet cover), a pressing edge is usually set on the top surface of the magnet cover corresponding to the voice coil position. Both the pressing groove and the pressing edge are stamped structures. However, when viewing the miniature loudspeaker from a top-down perspective, it can be seen that there is an overlapping area between the pressing edge and the pressing groove. The pressing groove limits the depth of the pressing edge, resulting in the pressing edge not being able to be set large enough, which in turn leads to a smaller lower vibration space of the voice coil in the miniature loudspeaker. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a miniature loudspeaker with a large space for vibration under the voice coil.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a miniature loudspeaker, comprising:

[0007] Voice coil;

[0008] A support component having an inner mounting portion connected to the lower part of the voice coil;

[0009] A magnetic cover, the top surface of which has a pressing edge for avoiding the voice coil and a clearance opening for avoiding the inner mounting part, the pressing edge communicating with the clearance opening;

[0010] A breathable insulating net is located in the clearance opening. The breathable insulating net includes a connected body and a folded edge, and the folded edge is welded to the inner wall of the clearance opening.

[0011] In one embodiment, the outer wall surface of the folded edge contacts the inner wall surface of the clearance opening.

[0012] In one embodiment, the breathable insulation net is a one-piece structure integrally processed.

[0013] In one embodiment, the bottom surface of the body is set higher than or flush with the bottom surface of the magnetic shield.

[0014] In one embodiment, when the microspeaker is viewed along its thickness direction, the voice coil and the folded edge have no overlapping area.

[0015] In one embodiment, the number of folded edges is multiple.

[0016] In one embodiment, the inner wall surface of the clearance opening includes a proximal wall surface and a distal wall surface, the proximal wall surface being close to the center of the miniature speaker, and the distal wall surface being far from the center of the miniature speaker, and the folded edge is welded to the proximal wall surface and the distal wall surface respectively.

[0017] In one embodiment, the folded edge is arranged in a circle along the edge of the body, and the top surface of the folded edge, corresponding to the area of ​​the pressing edge, is lower than or flush with the inner bottom surface of the pressing edge.

[0018] In one embodiment, the width of the gap between the edge of the body and the magnetic shield is less than or equal to the diameter of the air holes on the breathable insulating mesh.

[0019] In one embodiment, the thickness of the body is less than or equal to 0.3 mm.

[0020] The advantages of this invention are as follows: the bottom surface of the magnetic cover no longer needs to be provided with a pressing groove as a bonding position, which maximizes the pressing depth and allows for a larger lower vibration space for the voice coil, enabling the voice coil to vibrate more significantly and thus improving the performance of the miniature speaker; only a pressing edge needs to be provided on the magnetic cover, which helps to reduce a pressing process; compared with bonding the breathable isolation mesh to the magnetic cover, the breathable isolation mesh in this miniature speaker is welded to the magnetic cover, resulting in higher bonding strength and more guaranteed processing precision, while allowing the miniature speaker to remain thin and light. 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 schematic diagram of the overall structure of the miniature loudspeaker in Embodiment 1;

[0023] Figure 2 This is a cross-sectional view of the miniature loudspeaker in Embodiment 1;

[0024] Figure 3 This is a schematic diagram of a portion of the structure of the miniature loudspeaker in Embodiment 1;

[0025] Figure 4 for Figure 3 Exploded view of the structure shown;

[0026] Figure 5 This is a schematic diagram of a portion of the structure of the miniature loudspeaker in Embodiment 2;

[0027] Figure 6 for Figure 5 Exploded view of the structure shown.

[0028] Explanation of icon numbers:

[0029] 1. Pot stand;

[0030] 2. Vibrating assembly; 21. Diaphragm assembly; 22. Voice coil;

[0031] 3. Magnetic circuit assembly; 31. Magnetic cover; 311. Pressing edge; 312. Clearance opening; 3121. Near-end wall; 3122. Far-end wall; 32. Central magnetic structure; 33. Side magnetic structure;

[0032] 4. Supporting components; 41. Internal mounting part; 42. Deformation part; 43. External mounting part;

[0033] 5. Breathable insulation net; 51. Body; 52. Folded edge; 53. Air holes;

[0034] 6. Gap. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. 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 impossible to implement, 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.

[0040] 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.

[0041] Example 1

[0042] Please refer to Figures 1 to 4 The first embodiment of this utility model is: a miniature loudspeaker, including a basket frame 1, a vibration component 2, a magnetic circuit component 3, a support component 4 and a breathable isolation net 5, wherein the magnetic circuit component 3 and the vibration component 2 are respectively connected to the basket frame 1;

[0043] The vibration assembly 2 includes a connected diaphragm assembly 21 and a voice coil 22, wherein the diaphragm assembly 21 is connected to the frame 1;

[0044] The magnetic circuit assembly 3 includes a magnetic cover 31 and a central magnetic structure 32 and a side magnetic structure 33 respectively disposed on the magnetic cover 31. A magnetic gap is formed between the central magnetic structure 32 and the side magnetic structure 33 to allow the voice coil 22 to move.

[0045] The support component 4 includes an inner mounting part 41, a deformation part 42 and an outer mounting part 43 connected in sequence. The outer mounting part 43 is connected to the frame 1 and the inner mounting part 41 is connected to the lower part of the voice coil 22.

[0046] The top surface of the magnetic cover 31 has a pressing edge 311 for avoiding the voice coil 22 and an avoidance opening 312 for avoiding the inner mounting part 41. The pressing edge 311 corresponds to and connects to the magnetic gap, and the pressing edge 311 connects to the avoidance opening 312. The avoidance opening 312 is a through hole structure or a notch structure.

[0047] The breathable isolation net 5 is located in the avoidance opening 312. The breathable isolation net 5 includes a connected body 51 and a folded edge 52. The folded edge 52 is welded to the inner wall of the avoidance opening 312.

[0048] The breathable isolation net 5 is a metal structural component. In this embodiment, the breathable isolation net 5 is a stainless steel plate with air holes 53, and the air holes 53 are provided on the body 51. Preferably, the outer wall surface of the folded edge 52 is in contact with the inner wall surface of the clearance opening 312, which can improve the shaking phenomenon of the body 51 and help improve the stability of the connection between the breathable isolation net 5 and the magnetic cover 31.

[0049] To facilitate the processing and manufacturing of the breathable insulation net 5, it is preferable that the breathable insulation net 5 is a one-piece structure formed by integral processing. Optionally, the breathable insulation net 5 is formed by stamping from a single piece of metal sheet.

[0050] The thickness of the body 51 is less than or equal to 0.3 mm, such as 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, etc. In actual processing, the breathable isolation net 5 is formed by cutting, stamping and other processes from a metal plate with a thickness of less than or equal to 0.3 mm.

[0051] The bottom surface of the main body 51 is set higher than or flush with the bottom surface of the magnetic cover 31, and the main body 51 is as close as possible to the bottom end of the clearance opening 312, thereby ensuring that the inner mounting part 41 has sufficient downward vibration space.

[0052] The number of the clearance openings 312 and the number of the breathable isolation nets 5 are both multiple, and they are arranged in a one-to-one correspondence. In this embodiment, the voice coil 22 is rectangular, and the number of the support components 4 is four. The inner mounting parts 41 of the four support components 4 are respectively connected to the four corners of the voice coil 22. That is to say, the clearance openings 312 are respectively provided at the four corners of the rectangular frame-shaped pressing edge 311.

[0053] In order to form multiple welding points, thereby improving the connection stability between the magnetic cover 31 and the breathable isolation net 5 and improving the problem of poor bonding strength between the breathable isolation net 5 and the magnetic cover 31 in local areas, preferably, the number of the folded edges 52 is multiple, and the multiple folded edges 52 are arranged far apart from each other.

[0054] The inner wall surface of the clearance opening 312 includes a proximal wall surface 3121 and a distal wall surface 3122. The proximal wall surface 3121 is close to the center of the miniature speaker, and the distal wall surface 3122 is far from the center of the miniature speaker. The proximal wall surface 3121 and the distal wall surface 3122 are respectively welded with the flanges 52. In this embodiment, the body 51 is connected with three flanges 52. One flange 52 is welded to the proximal wall surface 3121, and the other two flanges 52 are welded to the distal wall surface 3122.

[0055] In one or more embodiments, when viewed through the micro-speaker along its thickness direction, the voice coil 22 and the folded edge 52 have no overlapping area. This prevents the voice coil 22 from colliding with the folded edge 52 during downward vibration.

[0056] A speaker module includes a module housing and a miniature speaker disposed within the module housing. The miniature speaker divides the internal space of the module housing into a front cavity and a rear cavity. The rear cavity is filled with sound-absorbing particles. The diameter of the pores 53 on the body 51 is smaller than the particle size of the sound-absorbing particles. The width of the gap 6 between the edge of the body 51 and the magnetic cover 31 is less than or equal to the diameter of the pores 53 on the breathable isolation mesh 5. It should be noted that the pores 53 on the breathable isolation mesh 5 themselves serve to allow air to pass through and isolate the sound-absorbing particles. Ensuring that the width of the gap 6 between the edge of the body 51 and the magnetic cover 31 is less than or equal to the diameter of the pores 53 on the breathable isolation mesh 5 ensures that sound-absorbing particles will not enter the miniature speaker through the gap 6 between the edge of the body 51 and the magnetic cover 31, thus preventing the miniature speaker from producing normal sound.

[0057] Example 2

[0058] Please refer to Figure 5 and Figure 6The second embodiment of this utility model is a parallel technical solution to the first embodiment. The difference between the second and the first embodiment is that the folded edge 52 on the breathable isolation net 5 is arranged in a circle along the edge of the body 51. The top surface of the folded edge 52 is lower than or flush with the inner bottom surface of the pressing edge 311 in the area corresponding to the pressing edge 311. The inner bottom surface of the pressing edge 311 is higher than or flush with the top surface of the pressing edge 311, which can prevent the voice coil from colliding with the folded edge 52.

[0059] 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 contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A microspeaker, characterized by: include Voice coil; A support component having an inner mounting portion connected to the lower part of the voice coil; A magnetic cover, the top surface of which has a pressing edge for avoiding the voice coil and a clearance opening for avoiding the inner mounting part, the pressing edge communicating with the clearance opening; A breathable insulating net is located in the clearance opening. The breathable insulating net includes a connected body and a folded edge, and the folded edge is welded to the inner wall of the clearance opening.

2. The microspeaker of claim 1, wherein: The outer wall surface of the folded edge contacts the inner wall surface of the clearance opening.

3. The micro speaker of claim 1, wherein: The breathable insulation net is a one-piece structure manufactured in one piece.

4. The miniature loudspeaker according to claim 1, characterized in that: The bottom surface of the main body is set higher than or flush with the bottom surface of the magnetic cover.

5. The microspeaker of claim 1, wherein: Viewing the micro-speaker through its thickness direction, the voice coil and the folded edge show no overlapping area.

6. The microspeaker of claim 1, wherein: The number of folded edges is multiple.

7. The microspeaker of claim 6, wherein: The inner wall of the clearance opening includes a proximal wall and a distal wall. The proximal wall is close to the center of the miniature speaker, and the distal wall is far from the center of the miniature speaker. The proximal wall and the distal wall are respectively welded with the folded edge.

8. The microspeaker of claim 1, wherein: The folded edge is arranged in a circle along the edge of the body, and the top surface of the folded edge is lower than or flush with the inner bottom surface of the pressing edge in the area corresponding to the pressing edge.

9. The microspeaker of claim 1, wherein: The width of the gap between the edge of the body and the magnetic cover is less than or equal to the diameter of the air holes on the breathable insulation net.

10. The miniature loudspeaker according to claim 1, characterized in that: The thickness of the body is less than or equal to 0.3 mm.

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