sound production unit

Abstract

The utility model discloses a sound unit, including magnetic circuit subassembly, the magnetic circuit subassembly includes side magnetic structure and by lower and upper sequentially connected lower yoke iron, center magnetic structure and upper yoke iron, the side magnetic structure includes by lower and upper sequentially connected lower side magnetic steel, side huasi and upper side magnetic steel, and upper side magnetic steel connects upper yoke iron, and lower side magnetic steel connects lower yoke iron, the lower part of lower side magnetic steel has the extension of extending towards the outside, and the top surface of extension is lower than or flush with the top surface of lower side magnetic steel setting. The sound unit in lower side magnetic steel has the extension of extending towards the outside, increases the total volume of magnetic steel under the premise of not influencing diaphragm subassembly lower vibration stroke, more fully utilizes the internal space of sound unit, is favorable to the promotion sound unit's BL value, further improves the performance of sound unit.

Description

Technical Field

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

[0002] As electronic devices such as mobile phones and tablets become smaller and thinner, the installation space left for sound units is getting smaller and smaller. However, at the same time, the performance requirements for sound units are getting higher and higher. How to improve the performance of sound units under the constraints of product structure and size has always been the research and development direction of practitioners.

[0003] Figure 1 A cross-sectional view of a sound-generating unit is shown. In this unit, both the central magnetic structure and the side magnetic structure have reverse magnets, which keeps the voice coil within the magnetic gap during vibration, increasing the BL value of the sound-generating unit. Compared with ordinary sound-generating units, its performance is improved to a certain extent. However, it does not make full use of the internal space of the sound-generating unit, and there is still room for further improvement. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a high-performance sound generating unit.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a sound-generating unit, including a magnetic circuit assembly, the magnetic circuit assembly including a side magnetic structure and a lower yoke, a central magnetic structure and an upper yoke connected in sequence from bottom to top, the side magnetic structure including a lower side magnet, a side washer and an upper side magnet connected in sequence from bottom to top, the upper side magnet is connected to the upper yoke, the lower magnet is connected to the lower yoke, the lower part of the lower side magnet has an extension portion extending outward, the top surface of the extension portion is lower than or flush with the top surface of the lower side magnet.

[0006] In one embodiment, the lower magnet and the extension are integrally formed into a single structure, or the lower magnet and the extension are separate structures.

[0007] In one embodiment, the outer side of the edge washer has a cover portion, the cover portion including a descending portion and an extension portion, the extension portion being connected to the top surface of the extension portion, and the descending portion connecting the extension portion to the edge washer.

[0008] In one embodiment, the top surface of the extension is lower than or flush with the top surface of the lower magnet.

[0009] In one embodiment, the descending portion is disposed near the outer wall of the lower magnet.

[0010] In one embodiment, the cover pressing part and the edge washer are integrally formed into a single structure, or the cover pressing part and the edge washer are separate structures.

[0011] In one embodiment, the device further includes a frame and a diaphragm assembly. The diaphragm assembly includes an inner fixing part, an inner folding ring part, a connecting part, an outer folding ring part, and an outer fixing part connected sequentially from the inside to the outside. The frame connects the outer fixing part to the lower yoke, and the inner fixing part connects to the magnetic circuit assembly.

[0012] In one embodiment, the inner fixing part is connected to the upper yoke.

[0013] In one embodiment, a portion of the inner fixing part is sandwiched between the upper yoke and the upper magnet.

[0014] In one embodiment, the system further includes a skeleton and a voice coil, the skeleton connecting the connecting portion and the voice coil, and a portion of the voice coil located between the central magnetic structure and the side magnetic structure.

[0015] The beneficial effects of this utility model are as follows: the lower magnet in this sound unit has an extension portion extending outward, which increases the overall volume of the magnet without affecting the lower vibration stroke of the diaphragm assembly, making fuller use of the internal space of the sound unit, which is conducive to improving the BL value of the sound unit and further improving the performance of the sound unit. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a cross-sectional view of a sound-generating unit in the prior art;

[0018] Figure 2 This is an exploded view of the sound-generating unit according to Embodiment 1 of this utility model;

[0019] Figure 3 This is a cross-sectional view of the sound-generating unit according to Embodiment 1 of this utility model;

[0020] Figure 4 This is a cross-sectional view of the sound-generating unit in Embodiment 2 of this utility model.

[0021] Explanation of icon numbers:

[0022] 1. Pot stand;

[0023] 2. Magnetic circuit assembly; 21. Lower yoke; 22. Central magnetic structure; 221. Lower central magnet; 222. Central washer; 223. Upper central magnet; 23. Upper yoke; 24. Side magnetic structure; 241. Lower side magnet; 2411. Extension; 242. Side washer; 2421. Descending part; 2422. Extension part; 243. Upper side magnet;

[0024] 3. Diaphragm assembly; 31. Inner fixing part; 32. Inner folding ring part; 33. Connecting part; 34. Outer folding ring part; 35. Outer fixing part;

[0025] 4. Skeleton;

[0026] 5. Voice coil;

[0027] 6. Centering support. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Example 1

[0035] Please refer to Figure 2 and Figure 3 One embodiment of this utility model is a sound-generating unit, including a frame 1, a magnetic circuit assembly 2, a diaphragm assembly 3, a frame 4, and a voice coil 5. The magnetic circuit assembly 2 includes a side magnetic structure 24 and a lower yoke 21, a central magnetic structure 22, and an upper yoke 23 connected sequentially from bottom to top. The lower yoke 21 is connected to the frame 1. The central magnetic structure 22 includes a lower central magnet 221, a central washer 222, and an upper central magnet 223 connected sequentially from bottom to top. The bottom of the lower central magnet 221 is connected to the lower yoke 21, and the top of the upper central magnet 223 is connected to the upper yoke 23. The magnetic pole orientation of the lower central magnet 221 is opposite to that of the upper central magnet 223. The central magnetic structure 22 has corresponding magnetic poles on both sides. The side magnetic structure 24 forms a magnetic gap between the central magnetic structure 22 and the side magnetic structure 24, allowing the voice coil 5 to move. That is, a portion of the voice coil 5 is located between the central magnetic structure 22 and the side magnetic structure 24. The side magnetic structure 24 includes a lower side magnet 241, a side washer 242, and an upper side magnet 243 connected sequentially from bottom to top. The top of the upper side magnet 243 is connected to an upper yoke 23, and the bottom of the lower side magnet 241 is connected to a lower yoke 21. The magnetic pole orientation of the lower side magnet 241 is opposite to that of the upper side magnet 243. The lower part of the lower side magnet 241 has an extension 2411 extending outward. The top surface of the extension 2411 is lower than or flush with the top surface of the lower side magnet 241.

[0036] The diaphragm assembly 3 connects the frame 1 and the magnetic circuit assembly 2. Specifically, the diaphragm assembly 3 includes an inner fixing part 31, an inner folding ring part 32, a connecting part 33, an outer folding ring part 34, and an outer fixing part 35 connected sequentially from the inside to the outside. The frame 1 is connected to the outer fixing part 35, and the inner fixing part 31 is connected to the magnetic circuit assembly 2. In this embodiment, the inner fixing part 31 is connected to the upper yoke 23. In one or more embodiments, a portion of the inner fixing part 31 is sandwiched between the upper yoke 23 and the upper magnet 243.

[0037] The skeleton 4 connects the voice coil 5 and the connecting part 33. The connection between the skeleton 4 and the voice coil 5 is located on the outer side of the end of the central magnetic structure 22. Due to the presence of the skeleton 4, the voice coil 5 and the diaphragm assembly 3 can be misaligned, so that the upper part of the voice coil 5 can also be in the magnetic gap.

[0038] To facilitate the manufacturing of the sound-generating unit, in this embodiment, the lower magnet 241 and the extension 2411 are integrally formed. In other embodiments, the lower magnet 241 and the extension 2411 can also be separate structures, in which case the extension 2411 and the lower magnet 241 are arranged close to each other.

[0039] In some embodiments, the sound-generating unit further includes a centering support 6, which connects the corner of the voice coil 5 to the frame 1.

[0040] Example 2

[0041] Please refer to Figure 4 Embodiment 2 of this utility model is a further improvement based on Embodiment 1. The difference from Embodiment 1 is that the outer side of the washer 242 has a cover portion, which includes a descending portion 2421 and an extension portion 2422. The extension portion 2422 is connected to the top surface of the extension portion 2411, and the descending portion 2421 connects the extension portion 2422 and the washer 242. The cover portion can guide the magnetic field lines of the extension portion 2411 towards the magnetic gap, thereby further improving the performance of the sound-generating unit.

[0042] To avoid the cover pressing part affecting the downward vibration stroke of the diaphragm assembly 3, the top surface of the extension 2422 is set lower than or flush with the top surface of the lower magnet 241.

[0043] Preferably, the descending part 2421 is disposed close to the outer wall of the lower magnet 241, and more preferably, the descending part 2421 is disposed in close contact with the outer wall of the lower magnet 241.

[0044] To facilitate the manufacturing of the sound-generating unit, in this embodiment, the cover pressing part and the edge washer 242 are integrally formed into a single structure. In other embodiments, the cover pressing part and the edge washer 242 can also be separate structures, in which case the cover pressing part and the edge washer 242 are in contact with each other.

[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 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 sound-generating unit, characterized in that: The system includes a magnetic circuit assembly comprising a side magnetic structure and a lower yoke, a central magnetic structure, and an upper yoke connected sequentially from bottom to top. The side magnetic structure comprises a lower side magnet, a side washer, and an upper side magnet connected sequentially from bottom to top. The upper side magnet is connected to the upper yoke, and the lower side magnet is connected to the lower yoke. The lower part of the lower side magnet has an extension extending outward, and the top surface of the extension is lower than or flush with the top surface of the lower side magnet.

2. The sound-generating unit according to claim 1, characterized in that: The lower magnet and the extension are integrally formed into a single structure, or the lower magnet and the extension are separate structures.

3. The sound-generating unit according to claim 1, characterized in that: The outer side of the edge washer has a cover portion, which includes a descending portion and an extension portion. The extension portion is connected to the top surface of the extension portion, and the descending portion connects the extension portion to the edge washer.

4. The sound-generating unit according to claim 3, characterized in that: The top surface of the extension is lower than or flush with the top surface of the lower magnet.

5. The sound-generating unit according to claim 3, characterized in that: The descending part is located near the outer wall of the lower magnet.

6. The sound-generating unit according to claim 3, characterized in that: The cover pressing part and the edge washer are integrally formed into a single structure, or the cover pressing part and the edge washer are separate structures.

7. The sound-generating unit according to claim 1, characterized in that: It also includes a frame and a diaphragm assembly. The diaphragm assembly includes an inner fixing part, an inner folding ring part, a connecting part, an outer folding ring part, and an outer fixing part connected in sequence from the inside to the outside. The frame connects the outer fixing part to the lower yoke, and the inner fixing part connects to the magnetic circuit assembly.

8. The sound-generating unit according to claim 7, characterized in that: The inner fixing part is connected to the upper yoke.

9. The sound-generating unit according to claim 8, characterized in that: A portion of the internal fixing part is sandwiched between the upper yoke and the upper magnet.

10. The sound-generating unit according to claim 7, characterized in that: It also includes a skeleton and a voice coil, the skeleton connecting the connecting part and the voice coil, and a portion of the voice coil located between the central magnetic structure and the side magnetic structure.

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