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 the magnetic cover also has a clearance opening for avoiding the inner mounting portion. The pressing edge connects to the clearance opening, and the bottom surface of the magnetic cover also has a mounting groove connecting to the clearance opening. The magnetic cover is visible along its thickness direction, and the mounting groove and the pressing edge have no overlapping area. The breathable insulating mesh includes a connected body and an extension. The body is located in the clearance opening, and the extension is located in the mounting groove and welded to the magnetic cover. The bottom surface of the magnetic cover no longer needs to have a pressing groove as a bonding position, and the mounting groove is misaligned with the pressing edge. Therefore, the presence of the mounting groove does not limit the depth of the pressing edge, allowing the pressing edge depth to be maximized. This allows for a larger lower vibration space for the voice coil, enabling the voice coil to vibrate more significantly, thereby improving the performance of the miniature loudspeaker.

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 the magnetic cover is also provided with a clearance opening for avoiding the inner mounting part. The pressing edge communicates with the clearance opening. The bottom surface of the magnetic cover is also provided with a mounting groove communicating with the clearance opening. When the magnetic cover is viewed along its thickness direction, the mounting groove and the pressing edge have no overlapping area.

[0010] A breathable insulating net, comprising a connected body and an extension, wherein the body is located in the clearance opening and the extension is located in the mounting groove and welded to the magnetic cover.

[0011] In one embodiment, the breathable insulating mesh is a metal structural component.

[0012] In one embodiment, the breathable insulating mesh is a stainless steel plate with air holes.

[0013] In one embodiment, the top surface of the body is coplanar with the top surface of the extension, and the bottom surface of the body is coplanar with the bottom surface of the extension.

[0014] In one embodiment, the thickness of the extension is less than or equal to the depth of the mounting groove.

[0015] In one embodiment, there are multiple mounting slots and multiple extensions, with each mounting slot corresponding to one extension, or at least one mounting slot accommodating multiple extensions.

[0016] In one embodiment, when the magnetic cover is viewed through the thickness direction, the inner and outer sides of the pressing edge are respectively provided with the mounting groove.

[0017] In one embodiment, when the magnetic cover is viewed along its thickness direction, the number of mounting grooves corresponding to the outer side of the pressing edge is multiple, and / or the number of mounting grooves corresponding to the inner side of the pressing edge is multiple.

[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 breathable insulation mesh is less than or equal to 0.3 mm.

[0020] The beneficial effects of this utility model are as follows: the bottom surface of the magnetic cover no longer needs to be provided with a pressure groove as a bonding position, and the mounting groove is misaligned with the pressure edge. Therefore, the existence of the mounting groove does not limit the depth of the pressure edge, so that the pressure edge depth can be maximized, thereby allowing the lower vibration space of the voice coil to be set larger, allowing the voice coil to vibrate more significantly, thereby improving the performance of the miniature speaker. Compared with bonding the breathable isolation mesh to the magnetic cover, the breathable isolation mesh and the magnetic cover are welded and fixed in this miniature speaker, resulting in higher bonding strength and more guaranteed processing precision, and allowing the miniature speaker to remain thin and light. The weld joint between the breathable isolation mesh and the magnetic cover is exposed, which facilitates the welding and fixing of the breathable isolation mesh and the magnetic cover. 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 partial exploded view of the miniature loudspeaker in Example 1;

[0024] Figure 3 This is a cross-sectional view of the miniature loudspeaker in Embodiment 1;

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

[0026] Figure 5 This is a perspective view of the magnetic cover in the miniature loudspeaker of Embodiment 1.

[0027] Explanation of icon numbers:

[0028] 1. Pot stand;

[0029] 2. Vibrating assembly; 21. Diaphragm assembly; 22. Voice coil;

[0030] 3. Magnetic circuit assembly; 31. Magnetic cover; 311. Pressing edge; 312. Clearance opening; 313. Mounting groove; 32. Central magnetic structure; 33. Side magnetic structure;

[0031] 4. Supporting components; 41. Internal mounting part; 42. Deformation part; 43. External mounting part;

[0032] 5. Breathable insulation net; 51. Main body; 52. Extension; 53. Air pores;

[0033] 6. Gap. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Example 1

[0041] Please refer to Figures 1 to 5 The first embodiment of this utility model is: a miniature loudspeaker, including a 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 are respectively connected to the frame 1;

[0042] 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;

[0043] 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.

[0044] 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.

[0045] The magnetic cover 31 is provided with a clearance opening 312 for avoiding the inner mounting part 41. The top surface of the magnetic cover 31 has a pressing edge 311 for avoiding the voice coil 22. The pressing edge 311 corresponds to and connects to the magnetic gap. The pressing edge 311 connects to the clearance opening 312. The clearance opening 312 is a through hole structure or a notch structure. The bottom surface of the magnetic cover 31 is also provided with a mounting groove 313 that connects to the clearance opening 312. When the magnetic cover 31 is viewed along its thickness direction, there is no overlapping area between the mounting groove 313 and the pressing edge 311.

[0046] The breathable isolation net 5 includes a connected body 51 and an extension 52. The body 51 is located in the clearance opening 312, and the extension 52 is located in the mounting groove 313 and welded to the magnetic cover 31. The extension 52 is formed by extending outward from the edge of the body 51.

[0047] 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. The thickness of the breathable isolation net 5 is less than or equal to 0.3mm, such as 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, etc.

[0048] To facilitate the processing and manufacturing of the breathable insulation net 5, in this embodiment, the top surface of the main body 51 is coplanar with the top surface of the extension 52, and the bottom surface of the main body 51 is coplanar with the bottom surface of the extension 52.

[0049] Preferably, the thickness of the extension 52 is less than or equal to the depth of the mounting groove 313, that is, in the miniature speaker, the extension 52 will not protrude relative to the bottom surface of the magnetic cover 31, thereby increasing the cross-sectional height of the miniature speaker.

[0050] The number of mounting slots 313 near the clearance opening 312 is multiple, and correspondingly, the number of extensions 52 of the breathable isolation net 5 is also multiple. Each mounting slot 313 corresponds one-to-one with an extension 52, or at least one mounting slot 313 accommodates multiple extensions 52. The multiple extensions 52 of the breathable isolation net 5 allow for multi-point welding between the breathable isolation net 5 and the magnetic cover 31, which helps improve the stability of the connection between the breathable isolation net 5 and the magnetic cover 31.

[0051] 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.

[0052] Viewing the magnetic cover 31 through its thickness direction, the inner and outer sides of the pressing edge 311 are respectively provided with mounting grooves 313. Correspondingly, the body 51 is connected to the inner and outer sides of the pressing edge 311 with extensions 52 respectively. The multiple extensions 52 on the breathable isolation net 5 are arranged far apart from each other, which allows the breathable isolation net 5 to achieve a more stable connection with the magnetic cover 31 and improves the local area lifting phenomenon of the breathable isolation net 5.

[0053] Viewing the magnetic cover 31 along its thickness direction, multiple mounting grooves 313 are found on the outer side of the pressing edge 311, and / or multiple mounting grooves 313 are found on the inner side of the pressing edge 311. In this embodiment, because the total length of the inner edge of the body 51 is short, while the total length of the outer edge of the body 51 is long, there is one mounting groove 313 on the inner side of the pressing edge 311, and two mounting grooves 313 on the outer side of the pressing edge 311.

[0054] 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 breathable isolation mesh 5 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.

[0055] 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: The voice coil is connected to a lower portion of the support member. The magnetic cover has a top surface with a pressing edge for avoiding the voice coil, and an avoiding opening for avoiding the inner mounting portion. The magnetic cover has a bottom surface with a mounting groove communicating with the avoiding opening. The air-permeable isolation net includes a body and an extension portion. The air-permeable isolation net is a metal structure.

2. The microspeaker of claim 1, wherein: The air-permeable isolation net is a stainless steel plate with air holes.

3. The microspeaker of claim 2, wherein: The top surface of the body is coplanar with the top surface of the extension portion.

4. The micro speaker of claim 1, wherein: The thickness of the extension portion is less than or equal to the depth of the mounting groove.

5. The microspeaker of claim 1, wherein: The number of the mounting grooves corresponds to the number of the extension portions.

6. The microspeaker of claim 1, wherein: The inner side and the outer side of the pressing edge correspond to the mounting grooves.

7. The microspeaker of claim 6, wherein: The number of the mounting grooves corresponding to the outer side of the pressing edge is multiple, and / or the number of the mounting grooves corresponding to the inner side of the pressing edge is multiple.

8. The microspeaker of claim 7, wherein: 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 air-permeable isolation net.

9. The microspeaker of claim 1, wherein: The thickness of the air-permeable isolation net is less than or equal to 0.3 mm.

10. The microspeaker of claim 1, wherein: ​

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