Miniature speaker

Abstract

This utility model discloses a miniature loudspeaker, including a frame, a spider, and a magnetic circuit assembly. The spider includes an inner mounting part, a deformation part, and an outer mounting part connected sequentially from the inside out. The outer mounting part and the frame insert are injection molded into an integral structure. The magnetic circuit assembly includes a yoke with a flange, which is fixedly connected to the inner mounting part. This miniature loudspeaker has a novel structure. By injection molding the outer mounting part of the spider and the frame insert into an integral structure and fixing the flange of the yoke to the inner mounting part of the spider, the bonding strength between the spider and the frame is ensured, while the magnetic circuit assembly can be elastically suspended relative to the frame by means of the deformation part of the spider. When the miniature loudspeaker is working, the reaction force generated by the large-scale vibration of the diaphragm driven by the voice coil drives the magnetic circuit assembly to move synchronously in the opposite direction, thereby transforming the unidirectional impact originally concentrated on the frame into bidirectional canceling internal stress, avoiding the whole-machine resonance caused by the rigid fixation of the magnetic circuit in traditional structures.

Description

Technical Field

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

[0002] Currently, mobile devices such as smartphones and tablets enrich people's lives. Electroacoustic transducers, as audio devices, play an indispensable role in various mobile devices. As consumers' demands for sound loudness increase, designers are correspondingly raising the performance requirements for electroacoustic transducers. When a miniature speaker is powered on, an audio current flows through the voice coil (coil) in a magnetic field, generating a magnetic field that varies with the audio current. This magnetic field interacts with the magnetic field of the permanent magnet, causing the voice coil to vibrate axially to produce sound. From the amplitude of 0.2mm in traditional miniature speakers to 0.65mm or more in master-level miniature speakers, the larger the amplitude of the diaphragm, the more intense the vibration (jitter) of the miniature speaker itself becomes, resulting in higher background noise or distortion. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a novel miniature loudspeaker with low self-vibration.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a miniature loudspeaker, comprising: Sink stand; The spring includes an inner mounting part, a deformation part and an outer mounting part connected sequentially from the inside to the outside. The outer mounting part and the frame insert are injection molded into an integral structure. A magnetic circuit assembly, comprising a yoke with a flange, the flange being fixedly connected to an inner mounting portion.

[0005] Furthermore, at least two of the top surface, outer wall surface, and two side surfaces of the flange are fixedly connected to the inner mounting part.

[0006] Furthermore, the top surface, outer wall surface, and two sides of the flange are all fixedly connected to the inner mounting part.

[0007] Furthermore, the spring wave is a metal structural component.

[0008] Furthermore, the inner mounting part is welded to the flange.

[0009] Furthermore, the deformable part includes two symmetrically arranged cantilever arms, each cantilever arm having at least one bending region.

[0010] Furthermore, the inner mounting part includes a vertical plate connected to the outer wall surface of the flange, the vertical plate is provided with a clearance opening, and the end of the deformable part away from the outer mounting part is connected to the edge of the clearance opening.

[0011] Furthermore, the end of the upright plate is bent inward to form a first side plate, which is connected to the side of the flange.

[0012] Furthermore, the top of the upright plate is bent inward to form a top plate, which is connected to the top surface of the flange.

[0013] Furthermore, the end of the top plate is bent downward to form a second side plate, which is connected to the side of the flange.

[0014] The beneficial effects of this utility model are as follows: This miniature loudspeaker has a novel structure. It integrates the outer mounting part of the spider and the frame insert into a single structure by injection molding, and fixes the flange of the yoke to the inner mounting part of the spider. While ensuring the bonding strength between the spider and the frame, the magnetic circuit assembly can be elastically suspended relative to the frame by means of the deformation part of the spider. When the miniature loudspeaker is working, the reaction force generated by the large-scale vibration of the diaphragm driven by the voice coil will drive the magnetic circuit assembly to move synchronously in the opposite direction. This transforms the unidirectional impact originally concentrated on the frame into bidirectional canceling internal stress, avoiding the whole-machine resonance caused by the rigid fixation of the magnetic circuit in the traditional structure. This significantly reduces the jitter and background noise of the miniature loudspeaker itself and effectively suppresses the distortion phenomenon under large amplitude. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a miniature loudspeaker; Figure 2 A schematic diagram of the overall structure of a miniature loudspeaker from another perspective; Figure 3 A cross-sectional view of a miniature loudspeaker; Figure 4 A schematic diagram of part of the structure of a miniature loudspeaker; Figure 5 A schematic diagram of the structure of a spider in a miniature loudspeaker; Label Explanation: 1. Pot stand; 2. Magnetic circuit assembly; 21. Yoke; 211. Flanged edge; 22. Central magnetic assembly; 221. Central magnet; 222. Central washer; 3. Vibrating assembly; 31. Voice coil; 32. Diaphragm assembly; 4. Spring; 41. Internal mounting part; 411. Vertical plate; 4111. Clearance opening; 412. First side plate; 413. Top plate; 42. Deformation part; 421. Cantilever; 4211. Bending area; 43. External mounting part. Detailed Implementation

[0016] 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.

[0017] Please refer to Figures 1 to 3 The miniature loudspeaker includes a frame 1, a spider 4, and a magnetic circuit assembly 2. The spider 4 includes an inner mounting part 41, a deformable part 42, and an outer mounting part 43 connected sequentially from the inside to the outside. The outer mounting part 43 and the frame 1 are injection molded into an integral structure. The magnetic circuit assembly 2 includes a yoke 21 with a flange 211, which is fixedly connected to the inner mounting part 41.

[0018] As can be seen from the above description, the beneficial effects of this utility model are as follows: This miniature loudspeaker has a novel structure. It integrates the outer mounting part 43 of the spring wave 4 with the insert of the frame 1 by injection molding, and fixes the flange 211 of the yoke 21 with the inner mounting part 41 of the spring wave 4. While ensuring the bonding strength between the spring wave 4 and the frame 1, the magnetic circuit assembly 2 can be elastically suspended relative to the frame 1 by means of the deformation part 42 of the spring wave 4. When the miniature loudspeaker is working, the reaction force generated by the large vibration of the diaphragm driven by the voice coil 31 will drive the magnetic circuit assembly 2 to move synchronously in the opposite direction, thereby transforming the unidirectional impact originally concentrated on the frame 1 into bidirectional canceling internal stress. This avoids the whole-machine resonance caused by the rigid fixation of the magnetic circuit in the traditional structure, significantly reduces the jitter and background noise of the miniature loudspeaker itself, and effectively suppresses the distortion phenomenon under large amplitude.

[0019] Please refer to Figures 2 to 4 Furthermore, at least two of the top surface, outer wall surface, and two side surfaces of the flange 211 are fixedly connected to the inner mounting part 41.

[0020] Furthermore, the top surface, outer wall surface, and two side surfaces of the flange 211 are all fixedly connected to the inner mounting part 41.

[0021] As can be seen from the above description, the large contact area between the flange 211 and the inner mounting part 41 is beneficial to improving the stability of the connection between the inner mounting part 41 and the flange 211, thereby making the micro speaker structure more stable and reducing the risk of separation between the magnetic circuit assembly 2 and the spider 4.

[0022] Furthermore, the elastic wave 4 is a metal structural component.

[0023] As can be seen from the above description, the metal material of the Spinner 4 is durable and helps to extend the service life of the miniature speaker.

[0024] Furthermore, the inner mounting part 41 is welded to the flange 211.

[0025] As can be seen from the above description, welding the inner mounting part 41 to the flange 211 can effectively reduce the risk of separation between the spring 4 and the flange 211.

[0026] Please refer to Figures 4 to 5 Furthermore, the deformable part 42 includes two symmetrically arranged cantilever 421, each cantilever 421 having at least one bending region 4211.

[0027] As can be seen from the above description, the two symmetrically arranged cantilevers 421 can make the flange 211 more evenly stressed, and the bending area 4211 of the cantilevers 421 can ensure that the cantilevers 421 have sufficient deformation margin.

[0028] Please refer to Figure 5 Furthermore, the inner mounting part 41 includes a vertical plate 411 connected to the outer wall surface of the flange 211, the vertical plate 411 is provided with a clearance opening 4111, and the end of the deformable part 42 away from the outer mounting part 43 is connected to the edge of the clearance opening 4111.

[0029] As can be seen from the above description, the clearance opening 4111 is provided on the upright plate 411 and the connection between the deformable part 42 and the upright plate 411 is located at the edge of the clearance opening 4111. This not only facilitates the processing and manufacturing of the spring wave 4, but also ensures that the upright plate 411 and the flange 211 have a large bonding area.

[0030] Please refer to Figure 5 Furthermore, the end of the upright plate 411 is bent inward to form a first side plate 412, and the first side plate 412 is connected to the side of the flange 211.

[0031] As can be seen from the above description, the presence of the first side plate 412 further increases the contact area between the inner mounting part 41 and the flange 211, thereby reducing the risk of separation between the magnetic circuit assembly 2 and the spring wave 4.

[0032] Please refer to Figure 5 Furthermore, the top of the upright plate 411 is bent inward to form a top plate 413, and the top plate 413 is connected to the top surface of the flange 211.

[0033] As can be seen from the above description, the presence of the top plate 413 further increases the contact area between the inner mounting part 41 and the flange 211, thereby reducing the risk of separation between the magnetic circuit assembly 2 and the spring wave 4.

[0034] Furthermore, the end of the top plate 413 is bent downward to form a second side plate, which is connected to the side of the flange 211.

[0035] As can be seen from the above description, the presence of the second side plate can increase the contact area between the inner mounting part 41 and the flange 211, thereby reducing the risk of separation between the magnetic circuit assembly 2 and the spring wave 4.

[0036] One embodiment of this utility model is a miniature speaker, which can be applied to electronic devices that can emit sound, such as mobile phones, watches, tablets, and AR glasses.

[0037] Please refer to Figures 1 to 3 The miniature loudspeaker includes a frame 1, a magnetic circuit assembly 2, a resonating assembly 3, and a spider 4. The frame 1 is a plastic structural component. The resonating assembly 3 includes a voice coil 31 and a diaphragm assembly 32 connecting the voice coil 31 and the frame 1. The magnetic circuit assembly 2 includes a yoke 21 and a central magnetic assembly 22 disposed on the yoke 21. The central magnetic assembly 22 includes a central magnet 221 and a central washer 222 located above the central magnet 221. The central magnet 221 is connected to the yoke. 21 and the center washer 222, the yoke 21 is rectangular, the four sides of the yoke 21 each have an upwardly bent flange 211, the center magnetic assembly 22 and the flange 211 form a magnetic gap for the voice coil 31 to move; the spring 4 includes an inner mounting part 41, a deformation part 42 and an outer mounting part 43 connected in sequence from the inside to the outside, the outer mounting part 43 and the frame 1 insert are injection molded into an integral structure, and the flange 211 is fixedly connected to the inner mounting part 41.

[0038] In the magnetic circuit assembly 2, the flange 211 is used as a magnetic guiding structure and forms a magnetic circuit through the magnetic gap with the central magnetic assembly 22. Compared with setting the side magnetic assembly, the overall volume of the miniature speaker is effectively reduced, so that the miniature speaker can be well adapted to narrow installation environments, thus adapting to increasingly compact electronic products.

[0039] Please refer to Figures 2 to 5 To ensure the structural stability of the miniature speaker, at least two of the top surface, outer wall surface, and two side surfaces of the flange 211 are fixedly connected to the inner mounting portion 41. In this embodiment, the top surface, outer wall surface, and two side surfaces of the flange 211 are all fixedly connected to the inner mounting portion 41.

[0040] Please refer to Figures 3 to 5In detail, the inner mounting part 41 includes a vertical plate 411 connected to the outer wall surface of the flange 211. The vertical plate 411 has a clearance opening 4111. The end of the deformable part 42 away from the outer mounting part 43 is connected to the edge of the clearance opening 4111. The end of the vertical plate 411 is bent inward to form a first side plate 412, which is connected to the side surface of the flange 211. The top of the vertical plate 411 is bent inward to form a top plate 413, which is connected to the top surface of the flange 211. This allows the top surface, outer wall surface, and two side surfaces of the flange 211 to be fixedly connected to the inner mounting part 41. In other embodiments, the end of the top plate 413 is bent downward to form a second side plate, which is also connected to the side surface of the flange 211. In this case, the first side plate 412 is not necessary.

[0041] More specifically, the spring wave 4 is a metal structural component, and the upright plate 411, top plate 413, first side plate 412 and second side plate can be formed by bending process.

[0042] In this embodiment, the inner mounting part 41 is glued to the flange 211. In other embodiments, the inner mounting part 41 is welded to the flange 211.

[0043] Please refer to Figure 5 In one or more embodiments, the deformation part 42 is a single-arm structure. In order to balance the force on the flange 211, in this embodiment, the deformation part 42 includes two symmetrically arranged cantilever arms 421. The cantilever arms 421 have at least one bending area 4211. Optionally, the cantilever arms 421 are S-shaped.

[0044] 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 Sink stand; The spring includes an inner mounting part, a deformation part and an outer mounting part connected sequentially from the inside to the outside. The outer mounting part and the frame insert are injection molded into an integral structure. A magnetic circuit assembly, comprising a yoke with a flange, the flange being fixedly connected to an inner mounting portion.

2. The miniature loudspeaker according to claim 1, characterized in that, At least two of the four components of the flange—the top surface, the outer wall surface, and the two side surfaces—are fixedly connected to the inner mounting portion.

3. The miniature loudspeaker according to claim 2, characterized in that, The top surface, outer wall surface, and two sides of the flange are all fixedly connected to the inner mounting part.

4. The miniature loudspeaker according to claim 1, characterized in that, The elastic wave is a metal structural component.

5. The miniature loudspeaker according to claim 4, characterized in that, The internal mounting part is welded to the flange.

6. The miniature loudspeaker according to claim 1, characterized in that, The deformable part includes two symmetrically arranged cantilever arms, each cantilever arm having at least one bending zone.

7. The miniature loudspeaker according to claim 1, characterized in that, The inner mounting part includes a vertical plate that connects to the outer wall surface of the flange, and the vertical plate is provided with a clearance opening. The end of the deformable part away from the outer mounting part is connected to the edge of the clearance opening.

8. The miniature loudspeaker according to claim 7, characterized in that, The end of the upright plate is bent inward to form a first side plate, and the first side plate is connected to the side of the flange.

9. The miniature loudspeaker according to claim 7, characterized in that, The top of the upright plate is bent inward to form a top plate, which is connected to the top surface of the flange.

10. The miniature loudspeaker according to claim 9, characterized in that, The top plate is bent downward at one end to form a second side plate, which is connected to the side of the flange.

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