Micro-speaker

Abstract

The utility model discloses a micro loudspeaker, including magnetic circuit system, insulating boss, centering support piece and two voice coils, magnetic circuit system includes yoke, center magnetic structure and the side magnetic subassembly of setting around center magnetic structure, center magnetic structure and side magnetic subassembly are arranged on yoke respectively, and center magnetic structure includes two center magnetic subassembly, and center magnetic subassembly has the through hole of upper and lower through -and -through, and yoke has the via hole of communicating through -hole and outside, insulating boss is located at the via hole, and insulating boss is embedded with conducting part, and the partial area of conducting part is exposed on the bottom surface of yoke, and centering support piece includes first mounting portion, and the both ends of first mounting portion are correspondingly set to the hollow region of two voice coils, and first mounting portion is connected with the elevated portion corresponding to through -hole, and the elevated portion is connected with the cantilever portion in through -hole, and the cantilever portion is connected with the second mounting portion fixed on insulating boss. This micro loudspeaker has the advantage of high performance.

Description

Technical Field

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

[0002] With the widespread use of smartphones and other mobile electronic devices, the market demand for miniature speakers is constantly increasing.

[0003] Consumers expect higher performance from miniature speakers in mobile electronic devices. Conventional miniature speakers use a centering support structure. Specifically, a large space needs to be reserved around the miniature speaker to place the centering support. Consequently, the volume of the miniature speaker's side magnet assembly is reduced, resulting in a smaller magnetic flux. At the same time, the effective length of the voice coil corresponding to the magnetic gap is very limited, leading to a low BL value for the miniature speaker, which seriously affects its performance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a high-performance miniature loudspeaker.

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

[0006] A magnetic circuit system, comprising a yoke, a central magnetic structure, and a side magnetic assembly surrounding the central magnetic structure, wherein the central magnetic structure and the side magnetic assembly are respectively disposed on the yoke, the central magnetic structure comprising two sets of central magnetic assemblies, each central magnetic assembly having a through hole extending vertically, and the yoke having a through hole connecting the through hole to the outside.

[0007] An insulating boss is provided at the through hole, and a conductive element is embedded in the insulating boss. A portion of the conductive element is exposed on the bottom surface of the yoke.

[0008] Two voice coils are provided, and the two voice coils are configured one-to-one with the two sets of central magnetic components;

[0009] A centering support includes a first mounting portion, with its two ends respectively corresponding to the hollow areas of the two voice coils. The first mounting portion is connected to a support portion corresponding to the through hole, and the support portion is connected to a cantilever portion located within the through hole. The cantilever portion is connected to a second mounting portion fixed to the insulating boss. The second mounting portion has an outer solder pad that communicates with the conductive element, and the end of the first mounting portion has an inner solder pad that communicates with the outer solder pad. The inner solder pad communicates with the voice coil.

[0010] Furthermore, the first mounting section, the elevated section, the cantilever section, and the second mounting section are an integrated structure.

[0011] Furthermore, the two sets of central magnetic components are close to each other and their magnetic poles face opposite directions.

[0012] Furthermore, the edge magnetic assembly includes a first edge magnet, a second edge magnet, and a third edge magnet. The first edge magnets are respectively provided on opposite sides of the central magnetic structure. The magnetic poles of the first edge magnets located on both sides of the central magnetic structure are oriented in opposite directions, and the magnetic poles of the first edge magnets are oriented in opposite directions to the magnetic poles of the central magnetic assembly closest to them. The second edge magnets are respectively provided at both ends of one set of central magnetic assemblies, and the magnetic poles of the second edge magnets are oriented in opposite directions to the magnetic poles of the corresponding central magnetic assembly. The third edge magnets are respectively provided at both ends of another set of central magnetic assemblies, and the magnetic poles of the third edge magnets are oriented in opposite directions to the magnetic poles of the corresponding central magnetic assembly.

[0013] Furthermore, the edge magnet assembly also includes a ring-shaped washer, with the first, second, and third edge magnets respectively connected to the ring-shaped washer.

[0014] Furthermore, the top surface of the central magnetic component has a clearance groove corresponding to the inner pad.

[0015] Furthermore, the central magnetic assembly includes a central magnet and a central washer, the central magnet being located below the central washer, the central magnet connecting the yoke and the central washer, the depth of the clearance groove being less than the thickness of the central washer, or the depth of the clearance groove being equal to the thickness of the central washer, or the depth of the clearance groove being greater than the thickness of the central washer.

[0016] Furthermore, it also includes a diaphragm assembly, which includes a connected diaphragm and a dome, with the connection between the first mounting portion and the diaphragm assembly corresponding to the dome.

[0017] Furthermore, the first mounting part is fixed on the dome, the dome has a support arm, and the support arm is connected to one end of the cantilever part near the elevated part.

[0018] Furthermore, the dome has an opening, the support arm connects to the edge of the opening, and the diaphragm assembly also includes a sealing cover plate, which is disposed on the dome and closes the opening.

[0019] The beneficial effects of this utility model are as follows: The miniature loudspeaker adopts a dual voice coil architecture, which can effectively improve the performance of the sound-generating unit and at the same time help to improve the magnetic utilization rate of the central magnetic structure, thereby improving the BL value of the sound-generating unit; the centering support is centrally located and the cantilever part of the centering support is accommodated by a hole in the central magnetic assembly, so that there is no need to reserve space for the centering support on the periphery of the miniature loudspeaker, thereby allowing the periphery of the miniature loudspeaker to have more space to stack the side magnetic assembly, and at the same time, it can increase the effective line length of the voice coil in the magnetic gap, which is conducive to further improving the BL value of the miniature loudspeaker, enabling the miniature loudspeaker to achieve high performance. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of a miniature loudspeaker;

[0021] Figure 2 A schematic diagram of the overall structure of a miniature loudspeaker from another perspective;

[0022] Figure 3 A cross-sectional view of a miniature loudspeaker;

[0023] Figure 4 This is a schematic diagram of the internal structure of a miniature loudspeaker.

[0024] Figure 5 This is a schematic diagram of the diaphragm assembly of a miniature loudspeaker.

[0025] Figure 6 This is a schematic diagram of part of the structure of a miniature loudspeaker.

[0026] Label Explanation:

[0027] 1. Pot stand;

[0028] 2. Magnetic circuit system; 21. Yoke; 211. Through hole; 22. Central magnetic assembly; 221. Through hole; 222. Clearance groove; 23. Side magnetic assembly; 231. First side magnet; 232. Second side magnet; 233. Third side magnet; 234. Ring washer;

[0029] 3. Diaphragm assembly; 31. Diaphragm; 32. Dome; 321. Support arm; 33. Sealing cover;

[0030] 4. Insulating boss; 41. Conductive component;

[0031] 5. Centering support; 51. First mounting section; 52. Elevation section; 53. Cantilever section; 54. Second mounting section;

[0032] 6. Voice coil. Detailed Implementation

[0033] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0034] Please refer to Figures 1 to 6 Miniature loudspeakers, including:

[0035] Magnetic circuit system 2, the magnetic circuit system 2 includes a yoke 21, a central magnetic structure and a side magnetic component 23 arranged around the central magnetic structure. The central magnetic structure and the side magnetic component 23 are respectively arranged on the yoke 21. The central magnetic structure includes two sets of central magnetic components 22. The central magnetic component 22 has a through hole 221 that runs vertically through the yoke. The yoke 21 has a through hole 211 that connects the through hole 221 to the outside.

[0036] An insulating boss 4 is provided at the through hole 211. A conductive element 41 is embedded in the insulating boss 4, and a portion of the conductive element 41 is exposed on the bottom surface of the yoke 21.

[0037] Two voice coils 6 are provided, and the two voice coils 6 are configured one-to-one with the two sets of central magnetic components 22;

[0038] The centering support 5 includes a first mounting portion 51, with its two ends respectively corresponding to the hollow areas of the two voice coils 6. The first mounting portion 51 is connected to a support portion 52 corresponding to the through hole 221. The support portion 52 is connected to a cantilever portion 53 located within the through hole 221. The cantilever portion 53 is connected to a second mounting portion 54 fixed on the insulating boss 4. The second mounting portion 54 is provided with an outer solder pad that communicates with the conductive element 41. The end of the first mounting portion 51 is provided with an inner solder pad that communicates with the outer solder pad. The inner solder pad communicates with the voice coil 6.

[0039] As can be seen from the above description, the beneficial effects of this utility model are as follows: The micro loudspeaker adopts a dual voice coil 6 architecture, which can effectively improve the performance of the sound-generating unit and at the same time help to improve the magnetic utilization rate of the central magnetic structure, thereby improving the BL value of the sound-generating unit; the centering support plate 5 is centrally located and the cantilever portion 53 of the centering support plate 5 is accommodated by a hole in the central magnetic component 22, so that there is no need to reserve space for the centering support plate 5 on the periphery of the micro loudspeaker, thereby allowing the periphery of the micro loudspeaker to have more space to stack the side magnetic component 23, and at the same time, it can increase the effective line length of the voice coil 6 in the magnetic gap, which is conducive to further improving the BL value of the micro loudspeaker, enabling the micro loudspeaker to achieve high performance.

[0040] Furthermore, the first mounting part 51, the elevated part 52, the cantilever part 53, and the second mounting part 54 are an integral structure.

[0041] As can be seen from the above description, the first mounting part 51, the elevated part 52, the cantilever part 53 and the second mounting part 54 constitute the centering support 5, which can be an FPC board.

[0042] Furthermore, the two sets of central magnetic components 22 are close to each other and their magnetic poles face opposite directions.

[0043] Furthermore, the side magnetic assembly 23 includes a first side magnet 231, a second side magnet 232, and a third side magnet 233. The first side magnet 231 is respectively provided on opposite sides of the central magnetic structure. The magnetic poles of the first side magnets 231 located on both sides of the central magnetic structure are opposite in orientation, and the magnetic poles of the first side magnets 231 are opposite in orientation to the magnetic poles of the central magnetic assembly 22 adjacent to them. The two ends of one set of central magnetic assemblies 22 are respectively provided with the second side magnets 232, and the magnetic poles of the second side magnets 232 are opposite in orientation to the magnetic poles of the corresponding central magnetic assembly 22. The two ends of another set of central magnetic assemblies 22 are respectively provided with the third side magnets 233, and the magnetic poles of the third side magnets 233 are opposite in orientation to the magnetic poles of the corresponding central magnetic assembly 22.

[0044] Furthermore, the edge magnetic assembly 23 also includes an annular washer 234, with the first edge magnet 231, the second edge magnet 232 and the third edge magnet 233 respectively connected to the annular washer 234.

[0045] Furthermore, the top surface of the central magnetic component 22 has a clearance groove 222 corresponding to the inner pad.

[0046] As can be seen from the above description, the clearance groove 222 can prevent the centering support 5 from colliding with the welding point of the voice coil 6 and the center magnetic assembly 22.

[0047] Furthermore, the central magnetic assembly 22 includes a central magnet and a central washer, the central magnet being located below the central washer, the central magnet connecting the yoke 21 and the central washer, the depth of the clearance groove 222 being less than the thickness of the central washer, or the depth of the clearance groove 222 being equal to the thickness of the central washer, or the depth of the clearance groove 222 being greater than the thickness of the central washer.

[0048] As can be seen from the above description, the depth of the clearance groove 222 can be set as needed.

[0049] Furthermore, it also includes a diaphragm assembly 3, which includes a connected diaphragm 31 and a dome 32, and the connection between the first mounting part 51 and the diaphragm assembly 3 is provided corresponding to the dome 32.

[0050] As can be seen from the above description, the connection between the first mounting part 51 and the diaphragm assembly 3 is set to correspond to the dome 32, which allows the diaphragm assembly 3 to better support the centering support 5 and prevent deformation of the connection between the diaphragm assembly 3 and the first mounting part 51.

[0051] Furthermore, the first mounting part 51 is fixed on the dome 32, the dome 32 has a support arm 321, the support arm 321 is connected to one end of the cantilever part 53 near the elevated part 52.

[0052] As can be seen from the above description, the dome 32 can provide more support for the centering support plate 5, which helps to ensure the structural stability of the miniature loudspeaker.

[0053] Furthermore, the dome 32 has an opening, the support arm 321 connects to the edge of the opening, and the diaphragm assembly 3 also includes a sealing cover plate 33, which is disposed on the dome 32 and closes the opening.

[0054] As can be seen from the above description, the support arm 321 has a simple forming method and is easy to process.

[0055] Please refer to Figures 1 to 6 The first embodiment of this utility model is a miniature loudspeaker, including a frame 1, a magnetic circuit system 2, a diaphragm assembly 3, an insulating boss 4, a centering support 5, and two voice coils 6. The magnetic circuit system 2 and the diaphragm assembly 3 are respectively connected to the frame 1. The magnetic circuit system 2 includes a yoke 21, a central magnetic structure, and a side magnetic assembly 23 arranged around the central magnetic structure. The central magnetic structure and the side magnetic assembly 23 are respectively disposed on the yoke 21. The central magnetic structure includes two sets of central magnetic assemblies 22. The central magnetic assembly 22 has a through hole 221 that runs vertically through the structure. The yoke 21 has a through hole 211 that connects the through hole 221 to the outside. The insulating boss 4 is disposed at the through hole 211. The insulating boss 4 has a conductive element 41 embedded in it. A portion of the conductive element 41 is exposed on the bottom surface of the yoke 21. The voice coil 6 is connected to the diaphragm assembly 3. The two voice coils 6 are respectively arranged in a one-to-one correspondence with the two sets of center magnetic assemblies 22. The centering support 5 includes a first mounting part 51. The two ends of the first mounting part 51 are respectively arranged in the hollow areas of the two voice coils 6. The first mounting part 51 is connected to a support part 52 corresponding to the through hole 221. The support part 52 is connected to a cantilever part 53 located in the through hole 221. The cantilever part 53 is connected to a second mounting part 54 fixed on the insulating boss 4. The second mounting part 54 is provided with an outer solder pad that is in communication with the conductive element 41. The end of the first mounting part 51 is provided with an inner solder pad that is in communication with the outer solder pad. The inner solder pad is in communication with the voice coil 6. The first mounting part 51, the support part 52, the cantilever part 53 and the second mounting part 54 are an integral structure.

[0056] In this embodiment, the two sets of central magnetic components 22 are close to each other and their magnetic poles face opposite directions, that is, the bottom of one set of central magnetic components 22 is the S pole and the bottom of the other set of central magnetic components 22 is the N pole.

[0057] In detail, the side magnetic assembly 23 includes a first side magnet 231, a second side magnet 232, and a third side magnet 233. The first side magnet 231 is respectively provided on opposite sides of the central magnetic structure. The magnetic poles of the first side magnets 231 located on both sides of the central magnetic structure are opposite in orientation, and the magnetic poles of the first side magnets 231 are opposite in orientation to the magnetic poles of the central magnetic assembly 22 adjacent to them. The two ends of one set of central magnetic assemblies 22 are respectively provided with the second side magnets 232, and the magnetic poles of the second side magnets 232 are opposite in orientation to the magnetic poles of the corresponding central magnetic assembly 22. The two ends of another set of central magnetic assemblies 22 are respectively provided with the third side magnets 233, and the magnetic poles of the third side magnets 233 are opposite in orientation to the magnetic poles of the corresponding central magnetic assembly 22.

[0058] The side magnetic assembly 23 also includes an annular washer 234. The first side magnet 231, the second side magnet 232 and the third side magnet 233 are respectively connected to the annular washer 234. The annular washer 234 is connected to the basin stand 1. In some embodiments, the annular washer 234 and the basin stand 1 are an integral structure formed by insert injection molding.

[0059] The top surface of the central magnetic component 22 has a relief groove 222 corresponding to the inner pad, the relief groove 222 being used to avoid the welding point between the inner pad and the lead wire of the voice coil 6.

[0060] In detail, the central magnetic assembly 22 includes a central magnet and a central washer. The central magnet is located below the central washer. The central magnet connects the yoke 21 and the central washer. The depth of the clearance groove 222 is less than the thickness of the central washer, or the depth of the clearance groove 222 is equal to the thickness of the central washer, or the depth of the clearance groove 222 is greater than the thickness of the central washer.

[0061] The diaphragm assembly 3 includes a connected diaphragm 31 and a dome 32. The connection between the first mounting part 51 and the diaphragm assembly 3 is provided corresponding to the dome 32. The outer edge of the diaphragm 31 is connected to the frame 1.

[0062] The first mounting part 51 is fixed to the dome 32, which has a support arm 321 connected to one end of the cantilever part 53 near the elevated part 52. In this embodiment, the dome 32 has a window, the support arm 321 is connected to the edge of the window, and the diaphragm assembly 3 further includes a sealing cover plate 33, which is disposed on the dome 32 and closes the window. Optionally, the support arm 321 is provided with reinforcing ribs.

[0063] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A miniature loudspeaker, characterized in that, include A magnetic circuit system, comprising a yoke, a central magnetic structure, and a side magnetic assembly surrounding the central magnetic structure, wherein the central magnetic structure and the side magnetic assembly are respectively disposed on the yoke, the central magnetic structure comprising two sets of central magnetic assemblies, each central magnetic assembly having a through hole extending vertically, and the yoke having a through hole connecting the through hole to the outside. An insulating boss is provided at the through hole, and a conductive element is embedded in the insulating boss. A portion of the conductive element is exposed on the bottom surface of the yoke. Two voice coils are provided, and the two voice coils are configured one-to-one with the two sets of central magnetic components; A centering support includes a first mounting portion, with its two ends respectively corresponding to the hollow areas of the two voice coils. The first mounting portion is connected to a support portion corresponding to the through hole, and the support portion is connected to a cantilever portion located within the through hole. The cantilever portion is connected to a second mounting portion fixed to the insulating boss. The second mounting portion has an outer solder pad that communicates with the conductive element, and the end of the first mounting portion has an inner solder pad that communicates with the outer solder pad. The inner solder pad communicates with the voice coil.

2. The miniature loudspeaker according to claim 1, characterized in that, The first mounting section, the elevated section, the cantilever section, and the second mounting section are an integrated structure.

3. The miniature loudspeaker according to claim 1, characterized in that, The two sets of central magnetic components are close to each other and their magnetic poles face opposite directions.

4. The miniature loudspeaker according to claim 3, characterized in that, The side magnetic assembly includes a first side magnet, a second side magnet, and a third side magnet. The first side magnets are respectively provided on opposite sides of the central magnetic structure. The magnetic poles of the first side magnets located on both sides of the central magnetic structure are oriented in opposite directions, and the magnetic poles of the first side magnets are oriented in opposite directions to the magnetic poles of the central magnetic assembly closest to them. The second side magnets are respectively provided at both ends of one set of central magnetic assemblies, and the magnetic poles of the second side magnets are oriented in opposite directions to the magnetic poles of the corresponding central magnetic assembly. The third side magnets are respectively provided at both ends of another set of central magnetic assemblies, and the magnetic poles of the third side magnets are oriented in opposite directions to the magnetic poles of the corresponding central magnetic assembly.

5. The miniature loudspeaker according to claim 4, characterized in that, The edge magnet assembly also includes a ring-shaped washer, and the first edge magnet, the second edge magnet, and the third edge magnet are respectively connected to the ring-shaped washer.

6. The miniature loudspeaker according to claim 1, characterized in that, The top surface of the central magnetic component has a clearance groove corresponding to the inner pad.

7. The miniature loudspeaker according to claim 6, characterized in that, The central magnetic assembly includes a central magnet and a central washer. The central magnet is located below the central washer and connects the yoke to the central washer. The depth of the clearance groove is less than the thickness of the central washer, or the depth of the clearance groove is equal to the thickness of the central washer, or the depth of the clearance groove is greater than the thickness of the central washer.

8. The miniature loudspeaker according to claim 1, characterized in that, It also includes a diaphragm assembly, which includes a connected diaphragm and a dome, and the connection between the first mounting portion and the diaphragm assembly is provided corresponding to the dome.

9. The miniature loudspeaker according to claim 8, characterized in that, The first mounting part is fixed on the dome, the dome has a support arm, and the support arm is connected to one end of the cantilever part near the elevated part.

10. The miniature loudspeaker according to claim 9, characterized in that, The dome has an opening, the support arm connects to the edge of the opening, and the diaphragm assembly also includes a sealing cover plate, which is disposed on the dome and closes the opening.

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