Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a frame, a magnetic circuit assembly, a voice coil, a centering disk and a diaphragm assembly, the magnetic circuit assembly comprises a yoke, a central magnetic structure and an edge magnetic structure, the central magnetic structure and the edge magnetic structure are respectively arranged on the yoke, the edge magnetic structure is arranged around the central magnetic structure, and a magnetic gap is formed between the edge magnetic structure and the central magnetic structure. The edge magnetic structure is provided with an opening communicated with the outer side and the magnetic gap; the voice coil is arranged corresponding to the magnetic gap; the centering support chip comprises an outer fixing part, a cantilever part, an inner fixing part and an extension part, the cantilever part is located on the outer side of the edge magnetic structure, one end of the cantilever part is connected with the outer fixing part, the outer fixing part is connected with the basin stand, one side of the other end of the cantilever part is connected with the inner fixing part, the other side of the other end of the cantilever part is connected with the extension part, and the inner fixing part extends into the opening part and is connected with the voice coil; the diaphragm assembly comprises a voice diaphragm and a dome, the voice diaphragm is connected with the dome and the basin stand, the dome is connected with the voice coil, and the dome is provided with a supporting arm connected with the extension part. The miniature loudspeaker is stable in structure and excellent in performance.

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 widely used in portable electronic devices such as mobile phones, laptops, and hearing aids. With the rapid development of these portable electronic devices, the requirements for the thickness of the miniature speakers used in them are becoming increasingly stringent. The smaller the thickness of the miniature speaker, the smaller the internal space, which undoubtedly leads to a smaller overall volume of the magnet, resulting in a certain degree of performance degradation of the miniature speaker.

[0003] Furthermore, in existing technologies, the centering supports of conventional superlinear miniature loudspeakers are located at the four corners of the voice coil. This necessitates reserving sufficient space for the side magnets of the miniature loudspeaker, resulting in a significant reduction in their volume and severely impacting the loudspeaker's performance. To address this issue, in some miniature loudspeakers, the majority of the cantilever portion of the centering support is located outside the side magnet structure. The inner fixing part of the centering support passes through the space reserved in the side magnet structure to connect to the voice coil. While this allows for a larger side magnet structure, the inner fixing part in this type of centering support is relatively slender, resulting in insufficient structural strength and reduced support for the vibrating components, thus affecting the structural stability of the miniature loudspeaker. Utility Model Content

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

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

[0006] Sink stand;

[0007] A magnetic circuit assembly, comprising a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke, the side magnetic structure being disposed around the central magnetic structure, a magnetic gap being formed between the side magnetic structure and the central magnetic structure, and the side magnetic structure having an opening communicating with its outer side and the magnetic gap;

[0008] A voice coil, wherein the voice coil is configured corresponding to the magnetic gap;

[0009] The centering support includes an outer fixing part, a cantilever part, an inner fixing part, and an extension part. The cantilever part is located outside the side magnet structure. One end of the cantilever part is connected to the outer fixing part, which is connected to the frame. One side of the other end of the cantilever part is connected to the inner fixing part, and the other side of the other end of the cantilever part is connected to the extension part. The inner fixing part extends into the mouth and is connected to the voice coil.

[0010] A diaphragm assembly, the diaphragm assembly including a diaphragm and a dome, the diaphragm connecting the dome to the frame, the dome connecting the voice coil, and the dome having a support arm connecting the extension.

[0011] In one embodiment, each of the internal fixing parts is connected to two symmetrically arranged cantilever parts.

[0012] In one embodiment, the cantilever is U-shaped.

[0013] In one embodiment, the edge magnetic structure includes two opposing edge magnetic portions, the edge magnetic portions being U-shaped, and the opening being formed between the ends of the two edge magnetic portions.

[0014] In one embodiment, the external fixing part is in the shape of a ring frame, and the cantilever part is connected to the opposite two sides of the external fixing part.

[0015] In one embodiment, the side magnet includes a side magnet and a side washer, the side magnet connecting the yoke and the side washer, and the side washer connecting the basin stand.

[0016] In one embodiment, the edge magnet is an integral structure, or the edge magnet is a composite structure composed of multiple sub-magnets.

[0017] In one embodiment, the edge washers in the two edge magnetic sections are connected by a connecting part to form an integral structure.

[0018] In one embodiment, the voice coil is racetrack-shaped, and the central magnetic structure, viewed from above, is waist-shaped.

[0019] In one embodiment, the support arm is provided with reinforcing ribs.

[0020] The beneficial effects of this utility model are as follows: the cantilever portion of the centering support is located on the outside of the side magnet structure, which allows the opening of the side magnet structure to be set to be relatively narrow and long, thereby increasing the overall volume of the side magnet structure and thus improving the performance of the miniature speaker; since the inner fixing part needs to be provided with a solder pad that is connected to the voice coil, the existence of the extension part provides a connection position for the support arm. The support arm connected to the extension part can strengthen the structural strength of the area near the inner fixing part of the centering support, reduce the risk of damage and tearing of the centering support, and help improve the structural stability of the miniature speaker. In addition, due to the setting of the support arm, the centering support can better support the diaphragm assembly, thereby improving the vibration intensity of the miniature speaker and further improving the performance of the miniature speaker. 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 cross-sectional view of the miniature loudspeaker according to Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of a portion of the structure of the miniature speaker according to Embodiment 1 of this utility model.

[0024] Explanation of icon numbers:

[0025] 1. Pot stand;

[0026] 2. Magnetic circuit assembly; 21. Yoke; 22. Central magnetic structure; 23. Side magnetic structure; 231. Side magnetic part; 2311. Side magnet; 2312. Side washer; 2313. Connecting part; 24. Mouth;

[0027] 3. Voice coil;

[0028] 4. Centering support; 41. External fixation part; 42. Cantilever part; 43. Internal fixation part; 44. Extension part;

[0029] 5. Diaphragm assembly; 51. Diaphragm; 52. Dome; 521. Body; 522. Support arm. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Example 1

[0037] Please refer to Figure 1 and Figure 2Embodiment 1 of this utility model is as follows: A miniature loudspeaker includes a frame 1, a magnetic circuit assembly 2, a voice coil 3, a centering support 4, and a diaphragm assembly 5. The magnetic circuit assembly 2 includes a yoke 21 and a central magnetic structure 22 and a side magnetic structure 23 respectively disposed on the yoke 21. The side magnetic structure 23 is arranged around the central magnetic structure 22, and a magnetic gap is formed between the side magnetic structure 23 and the central magnetic structure 22. The side magnetic structure 23 has an opening 24 communicating with its outer side and the magnetic gap. The centering support 4 includes an outer fixing part 41, a cantilever part 42, an inner fixing part 43, and an extension part 44. The cantilever part 42 is located outside the side magnetic structure 23, and one end of the cantilever part 42 is connected to the outer fixing part 41. The outer fixing part 41 is connected to the frame 1. One side of the other end of the cantilever 42 is connected to the inner fixing part 43, and the other side of the other end of the cantilever 42 is connected to the extension part 44. The inner fixing part 43 extends into the opening 24 and is connected to the voice coil 3. The outer fixing part 41, the cantilever 42, the inner fixing part 43 and the extension part 44 are integrally formed into a single structure. In this embodiment, the centering support 4 is an FPC board. The diaphragm assembly 5 includes a diaphragm 51 and a dome 52. The diaphragm 51 connects the dome 52 to the frame 1. The dome 52 connects to the voice coil 3. The voice coil 3 is set corresponding to the magnetic gap. The dome 52 has a support arm 522 that connects to the extension part 44. To improve the structural strength of the support arm 522 itself, the support arm 522 is provided with reinforcing ribs.

[0038] Specifically, the central area of ​​the diaphragm 51 is hollowed out, the dome 52 includes a connected body 521 and a support arm 522, the body 521 connects to the diaphragm 51 and covers the hollowed-out area of ​​the diaphragm 51, and the voice coil 3 is connected to the body 521. Preferably, the support arm 522 is formed by bending a portion of the body 521.

[0039] To balance the force on the centering support plate 4, each of the internal fixing parts 43 is connected to two symmetrically arranged cantilever parts 42. In this embodiment, the cantilever part 42 is U-shaped. In other embodiments, the cantilever part 42 may be in other shapes.

[0040] Specifically, the side magnetic structure 23 includes two oppositely arranged side magnetic parts 231, the side magnetic parts 231 are U-shaped, and the opening 24 is formed between the ends of the two side magnetic parts 231. That is, in this embodiment, the side magnetic structure 23 has two openings 24.

[0041] Optionally, the external fixing part 41 is in the shape of a ring frame, and in this case, the cantilever part 42 is connected to the opposite two sides of the external fixing part 41.

[0042] The side magnet 231 includes a side magnet 2311 and a side washer 2312. The side magnet 2311 connects the yoke 21 and the side washer 2312. The side washer 2312 connects the basin stand 1. In this embodiment, the side magnet 2311 is an integral structure. In other embodiments, the side magnet 2311 can also be a combined structure composed of multiple sub-magnets. In this case, the multiple sub-magnets are close to each other to form a U-shape.

[0043] To facilitate the production and assembly of the miniature loudspeaker, the two side washer 2312 in the two side magnets 231 are connected as a single unit via connecting parts 2313. In other words, the two side washer 2312 and the two connecting parts 2313 form a ring frame structure. Preferably, this ring frame structure is injection molded as a single unit with the frame 1. In this embodiment, the external fixing part 41 is indirectly connected to the frame 1 via the ring frame structure.

[0044] In the prior art, the voice coil 3 is often rectangular. Due to the influence of the production stretching process, the dimensional accuracy deviation of the four corners of the voice coil 3 is relatively large. Therefore, the corners of the central magnetic structure 22 of the micro loudspeaker need to be avoided to a certain extent, so that the volume of the central magnetic structure 22 cannot be maximized. In this embodiment, the voice coil 3 is racetrack shaped. Compared with the rectangular frame voice coil 3, the racetrack-shaped voice coil 3 has a higher degree of dimensional control, which helps to reduce the avoidance of the voice coil 3 by the central magnetic structure 22, thereby saving the internal space of the micro loudspeaker and allowing the overall volume of the magnetic circuit assembly 2 of the micro loudspeaker to be set larger, so as to further improve the performance of the micro loudspeaker. Correspondingly, the central magnetic structure 22 is waist-shaped when viewed from above.

[0045] 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 micro speaker, characterized by: The application relates to a loudspeaker, which comprises a frame, a magnetic circuit assembly, a voice coil, a centering support sheet and a diaphragm assembly. The magnetic circuit assembly comprises a yoke, a center magnetic structure and an edge magnetic structure arranged on the yoke respectively, the edge magnetic structure is arranged around the center magnetic structure, a magnetic gap is formed between the edge magnetic structure and the center magnetic structure, the edge magnetic structure has a port communicating with the outside and the magnetic gap. The voice coil is arranged corresponding to the magnetic gap. The centering support sheet comprises an outer fixing part, a cantilever part, an inner fixing part and an extension part, the cantilever part is located outside the edge magnetic structure, one end of the cantilever part is connected with the outer fixing part, the outer fixing part is connected with the frame, one side of the other end of the cantilever part is connected with the inner fixing part, the other side of the other end of the cantilever part is connected with the extension part, the inner fixing part extends into the port and is connected with the voice coil. The diaphragm assembly comprises a diaphragm and a dome, the dome is connected with the frame, the dome is connected with the voice coil, and the dome has a support arm connected with the extension part. Each inner fixing part is connected with two cantilever parts arranged symmetrically.

2. The microspeaker of claim 1, wherein: The cantilever part is in U shape.

3. The microspeaker of claim 2, wherein: The edge magnetic structure comprises two oppositely arranged edge magnetic parts, the edge magnetic part is in concave shape, and the port is formed between the end parts of the two edge magnetic parts.

4. The micro speaker of claim 1, wherein: The outer fixing part is in ring frame shape, and the opposite sides of the outer fixing part are respectively connected with the cantilever parts.

5. The microspeaker of claim 4, wherein: The edge magnetic part comprises an edge magnetic steel and an edge Halsier, the edge magnetic steel is connected with the yoke and the edge Halsier, and the edge Halsier is connected with the frame.

6. The microspeaker of claim 4, wherein: The edge magnetic steel is in integral structure, or the edge magnetic steel is in combined structure combined by a plurality of sub-magnetic steels.

7. The microspeaker of claim 6, wherein: The edge Halsiers in the two edge magnetic parts are connected as an integral structure through a connecting part.

8. The microspeaker of claim 6, wherein: The voice coil is in runway shape, and the center magnetic structure is in waist shape in the overhead state.

9. The microspeaker of claim 1, wherein: The support arm is provided with a reinforcing concave rib.

10. The microspeaker of claim 1, wherein: ​

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