Sound unit

Abstract

This utility model discloses a sound-generating unit, including a magnetic circuit assembly, a voice coil, a diaphragm assembly, a conductive frame, and a centering support. The magnetic circuit assembly includes an upper yoke, a lower yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the lower yoke. The upper yoke covers the central magnetic structure and the side magnetic structures. The central magnetic structure is located between the two oppositely disposed side magnetic structures. The magnetic circuit assembly has a magnetic gap surrounding the central magnetic structure and located between the upper and lower yokes. The magnetic circuit assembly has a first magnetic loop and a second magnetic loop with opposite directions. The first magnetic loop passes through the upper part of the magnetic gap, and the second magnetic loop passes through the lower part of the magnetic gap. The voice coil is located in the magnetic gap. The diaphragm assembly includes an inner fixed part, an inner folded loop part, a transition part, an outer folded loop part, and an outer fixed part connected sequentially from the inside to the outside. The inner fixed part is connected to the magnetic circuit assembly. This sound-generating unit has high acoustic performance.

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, but the performance requirements for sound units are getting higher and higher. Therefore, how to improve the performance of sound units under the constraint of product structure size has become the goal pursued by practitioners.

[0003] Existing sound units typically employ a single-sided magnetic circuit system, where the magnetic circuit assembly is designed at the bottom of the voice coil. However, when the voice coil vibrates upwards, it moves away from the magnetic gap, resulting in poor symmetry and flatness of the BL (Bottom Line). Furthermore, the fact that the voice coil only has a magnetic circuit assembly at one end significantly limits performance improvement. Additionally, the centering support connecting the voice coil occupies a considerable amount of space available for setting up the side magnetic structure, thus limiting the volume of the side magnetic structure. Moreover, the fact that the centering support connects to the bottom of the voice coil also prevents the voice coil's amplitude from increasing further. 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: a sound-generating unit, comprising:

[0006] A magnetic circuit assembly includes an upper yoke, a lower yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the lower yoke. The upper yoke covers the central magnetic structure and the side magnetic structures. The central magnetic structure is located between the two oppositely disposed side magnetic structures. The magnetic circuit assembly has a magnetic gap surrounding the central magnetic structure and located between the upper yoke and the lower yoke. The magnetic circuit assembly has a first magnetic loop and a second magnetic loop with opposite directions. The first magnetic loop passes through the upper part of the magnetic gap, and the second magnetic loop passes through the lower part of the magnetic gap.

[0007] A voice coil, wherein the voice coil is located in the magnetic gap;

[0008] A diaphragm assembly, comprising an inner fixing part, an inner folded ring part, a transition part, an outer folded ring part, and an outer fixing part connected sequentially from the inside to the outside, wherein the inner fixing part is connected to the magnetic circuit assembly;

[0009] A conductive frame, comprising an inner mounting portion, a connecting portion, an outer mounting portion, and an extension arm connected in sequence, wherein the inner mounting portion is connected to the voice coil, and the outer mounting portion is connected to the transition portion;

[0010] The centering support includes an outer structural part, a cantilever part, and an inner structural part connected in sequence. The inner structural part is fixedly connected to the extension arm, and the centering support is electrically connected to the voice coil through the conductive frame.

[0011] In one embodiment, the bottom end of the extension arm has a first protrusion that bends outward, and the inner structural portion has a second protrusion that bends outward toward a side closer to the outer structural portion, wherein the first protrusion and the second protrusion are welded together.

[0012] In one embodiment, the bottom end of the extension arm has a first protrusion that bends inward and extends inward, and the inner structural portion has a second protrusion that bends inward and extends away from the outer structural portion, wherein the first protrusion and the second protrusion are welded together.

[0013] In one embodiment, the conductive skeleton is a conductive structural component made of a conductive material.

[0014] In one embodiment, the edge magnetic structure is generally U-shaped, and a portion of the connecting part is located in the gap between the two edge magnetic structures.

[0015] In one embodiment, the voice coil includes a connected body and leads, the body being located in the magnetic gap, and the leads being welded to the conductive frame for electrical connection.

[0016] In one embodiment, there are two centering supports and two conductive frames. The conductive frames are connected to the centering supports in a one-to-one correspondence and are conductive. The centering supports are respectively provided at both ends of the central magnetic structure. There are two leads, and the two leads are welded to the two conductive frames in a one-to-one correspondence.

[0017] In one embodiment, the inner mounting portion includes an outer wall portion and a top wall portion connected together, the outer wall portion being connected to the outer wall surface of the body, and the top wall portion being connected to the top surface of the body.

[0018] In one embodiment, the bottom surface of the connecting portion is set higher than the bottom surface of the main body.

[0019] In one embodiment, the height difference between the bottom surface of the connector and the bottom surface of the body is greater than or equal to the wire diameter of the lead wire.

[0020] The beneficial effects of this invention are as follows: The novel structure of this sound-generating unit ensures that during vibration, both the upper and lower parts of the voice coil move within the magnetic gap, without exceeding it. This improves the symmetry, flatness, and sensitivity of the black-and-white (BL) value, thereby enhancing the acoustic performance of the sound-generating unit. Furthermore, the large overall volume of the magnetic circuit components and the long effective length of the voice coil within the magnetic gap significantly increase the BL value, further improving the unit's performance. Additionally, the staggered arrangement of the voice coil and diaphragm assembly prevents the diaphragm from occupying space above the voice coil, allowing the voice coil to vibrate with greater amplitude while maintaining a slim profile, thus increasing the loudness of the sound-generating unit. Moreover, the centering support is electrically connected to the voice coil via a conductive frame, greatly reducing its structural size and minimizing its horizontal and vertical space occupation. This allows for greater space for the side magnetic structure to enhance the BL value, while also enabling the voice coil to have a larger amplitude, further improving the unit's performance. 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 an exploded view of the sound-generating unit in Embodiment 1;

[0023] Figure 2 A cross-sectional view of the sound-generating unit in Embodiment 1 Figure 1 ;

[0024] Figure 3 A cross-sectional view of the sound-generating unit in Embodiment 1 Figure 2 ;

[0025] Figure 4 This is a schematic diagram of a portion of the structure of the sound-generating unit in Embodiment 1;

[0026] Figure 5 This is a cross-sectional view of the sound-generating unit in Embodiment 2;

[0027] Figure 6 This is a schematic diagram of a portion of the sound-generating unit in Embodiment 2.

[0028] Explanation of icon numbers:

[0029] 1. Pot stand;

[0030] 2. Magnetic circuit assembly; 21. Upper yoke; 22. Lower yoke; 23. Central magnetic structure; 231. Lower central magnet; 232. Central washer; 233. Upper central magnet; 24. Side magnetic structure; 241. Lower side magnet; 242. Side washer; 243. Upper side magnet;

[0031] 3. Diaphragm assembly; 31. Inner fixing part; 32. Inner folding ring part; 33. Transition part; 34. Outer folding ring part; 35. Outer fixing part;

[0032] 4. Frame; 41. Inner mounting part; 411. Outer wall part; 412. Top wall part; 42. Connecting part; 43. Outer mounting part; 44. Extension arm; 45. First protrusion;

[0033] 5. Voice coil; 51. Body; 52. Lead wire;

[0034] 6. Centering support; 61. External structural part; 62. Cantilever part; 63. Internal structural part; 64. Second protrusion. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Furthermore, if the word "and / or" appears throughout the text, it means that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, 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.

[0040] 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.

[0041] Example 1

[0042] Please refer to Figures 1 to 4The first embodiment of this utility model is as follows: a sound-generating unit, including a frame 1, a magnetic circuit assembly 2, a diaphragm assembly 3, a conductive frame 4, a voice coil 5, and a centering support 6. The magnetic circuit assembly 2 is fixedly connected to the frame 1. The magnetic circuit assembly 2 includes an upper yoke 21, a lower yoke 22, and a central magnetic structure 23 and a side magnetic structure 24 respectively disposed on the lower yoke 22. The upper yoke 21 covers the central magnetic structure 23 and the side magnetic structure 24. The central magnetic structure 23 is located between the two oppositely disposed side magnetic structures 24. The magnetic circuit assembly 2 has a magnetic gap. The voice coil 5 includes a connected body 51 and a lead wire 52. The body 51 is located in the magnetic gap, which surrounds the central magnetic structure 23. The magnetic gap is located between the upper yoke 21 and the lower yoke 22. The magnetic circuit assembly 2 has a first magnetic circuit and a second magnetic circuit with opposite directions. The first magnetic circuit passes through the upper part of the magnetic gap, and the second magnetic circuit passes through the lower part of the magnetic gap. The diaphragm assembly 3 includes an inner fixing part 31, an inner folded ring part 32, a transition part 33, an outer folded ring part 34, and an outer fixing part 35 connected sequentially from the inside to the outside. The fixing part 35 connects to the frame 1, and the inner fixing part 31 connects to the magnetic circuit assembly 2. Preferably, the inner fixing part 31 connects to the upper yoke 21. The conductive frame 4 is a conductive structural component made of conductive material. The material of the conductive frame 4 can be aluminum or its alloys. The conductive frame 4 includes an inner mounting part 41, a connecting part 42, an outer mounting part 43, and an extension arm 44 connected in sequence. The inner mounting part 41 connects to the body 51 of the voice coil 5, and the outer mounting part 43 connects to the transition part 33. There are two centering supports 6, and the center magnetic junction... The two ends of the structure 23 are respectively provided with the centering support plate 6. The centering support plate 6 includes an outer structure part 61, a cantilever part 62 and an inner structure part 63 connected in sequence. The inner structure part 63 is fixedly connected to the extension arm 44. The centering support plate 6 is electrically connected to the voice coil 5 through the conductive frame 4. Specifically, there are two conductive frames 4. The conductive frames 4 are connected to the centering support plate 6 one by one and are electrically connected. There are two leads 52. The two leads 52 are welded to the two conductive frames 4 one by one to achieve electrical connection.

[0043] The inner mounting portion 41 is bonded and fixed to the voice coil 5. In one embodiment, the inner mounting portion 41 includes an outer wall portion 411 and a top wall portion 412 connected together. The outer wall portion 411 is connected to the outer wall surface of the voice coil 5, and the top wall portion 412 is connected to the top surface of the voice coil 5. This can increase the bonding area between the voice coil 5 and the inner mounting portion 41, thereby improving the structural stability of the sound-generating unit.

[0044] The central magnetic structure 23 includes a lower central magnet 231, a central washer 232, and an upper central magnet 233 connected sequentially from bottom to top; 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. Preferably, when the sound-generating unit is not working, the middle part of the body 51 of the voice coil 5 is aligned or approximately aligned with the central washer 232, that is, when the sound-generating unit is not working, the voice coil 5 is centered within the magnetic gap in the thickness direction of the sound-generating unit. It is easy to understand that the upper yoke 21, the upper side magnet 243, and the upper central magnet 233 near the upper side magnet 243 constitute the first magnetic circuit, and the lower yoke 22, the lower side magnet 241, and the lower central magnet 231 near the lower side magnet 241 constitute the second magnetic circuit.

[0045] The side magnetic structure 24 is arranged on the long side of the central magnetic structure 23. In order to improve the B value of the sound-generating unit, the side magnetic structure 24 is preferably U-shaped. The connecting part 42 is located on the outside of the end of the central magnetic structure 23, and a part of the connecting part 42 is located in the gap between the two side magnetic structures 24.

[0046] In this embodiment, the connection between the extension arm 44 and the outer mounting portion 43 is located at the outer edge of the outer mounting portion 43.

[0047] In one or more embodiments, the extension arm 44 is bonded and fixed to the inner structural portion 63. In this embodiment, the bottom end of the extension arm 44 has a first protrusion 45 that bends outward, and the inner structural portion 63 has a second protrusion 64 that bends and extends toward the side closer to the outer structural portion 61. The first protrusion 45 and the second protrusion 64 are welded and connected.

[0048] In a preferred embodiment, the bottom surface of the connecting portion 42 is higher than the bottom surface of the voice coil 5. More preferably, the height difference between the bottom surface of the connecting portion 42 and the bottom surface of the voice coil 5 is greater than or equal to the diameter of the lead wire 52.

[0049] To improve the wobbling phenomenon of the lead wire 52, in some embodiments, the lead wire 52 is fixedly connected to the skeleton 4, and the specific connection method can be bonding, etc.

[0050] Example 2

[0051] Please refer to Figure 5 and Figure 6 This second embodiment is a parallel technical solution to the first embodiment. The difference between the two embodiments is that the bottom end of the extension arm 44 has a first protrusion 45 that bends and extends inward, and the inner structure part 63 has a second protrusion 64 that bends and extends away from the outer structure part 61. The first protrusion 45 and the second protrusion 64 are welded and connected.

[0052] 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 emitting unit, characterized by: include A magnetic circuit assembly includes an upper yoke, a lower yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the lower yoke. The upper yoke covers the central magnetic structure and the side magnetic structures. The central magnetic structure is located between the two oppositely disposed side magnetic structures. The magnetic circuit assembly has a magnetic gap surrounding the central magnetic structure and located between the upper yoke and the lower yoke. The magnetic circuit assembly has a first magnetic loop and a second magnetic loop with opposite directions. The first magnetic loop passes through the upper part of the magnetic gap, and the second magnetic loop passes through the lower part of the magnetic gap. A voice coil, wherein the voice coil is located in the magnetic gap; A diaphragm assembly, comprising an inner fixing part, an inner folded ring part, a transition part, an outer folded ring part, and an outer fixing part connected sequentially from the inside to the outside, wherein the inner fixing part is connected to the magnetic circuit assembly; A conductive frame, comprising an inner mounting portion, a connecting portion, an outer mounting portion, and an extension arm connected in sequence, wherein the inner mounting portion is connected to the voice coil, and the outer mounting portion is connected to the transition portion; The centering support includes an outer structural part, a cantilever part, and an inner structural part connected in sequence. The inner structural part is fixedly connected to the extension arm, and the centering support is electrically connected to the voice coil through the conductive frame.

2. The sound producing unit of claim 1, wherein: The bottom end of the extension arm has a first protrusion that bends outward, and the inner structural part has a second protrusion that bends outward toward the side closer to the outer structural part. The first protrusion and the second protrusion are welded and connected.

3. The sound producing unit of claim 1, wherein: The bottom end of the extension arm has a first protrusion that bends inward and extends inward, and the inner structural part has a second protrusion that bends inward and extends away from the outer structural part. The first protrusion and the second protrusion are welded and connected.

4. The sound producing unit of claim 1, wherein: The conductive skeleton is a conductive structural component made of conductive material.

5. The sound producing unit of claim 1, wherein: The edge magnetic structure is generally U-shaped, and a portion of the connecting part is located in the gap between the two edge magnetic structures.

6. The sound producing unit of claim 1, wherein: The voice coil includes a connected body and leads. The body is located in the magnetic gap, and the leads are welded to the conductive frame for conduction.

7. The sound producing unit of claim 6, wherein: The centering support plate and the conductive skeleton are each two. The conductive skeleton and the centering support plate are connected and conductive in a one-to-one correspondence. The centering support plate is provided at both ends of the central magnetic structure. There are two leads. The two leads are welded to the two conductive skeletons in a one-to-one correspondence.

8. The sound producing unit of claim 6, wherein: The inner mounting portion includes an outer wall portion and a top wall portion connected together. The outer wall portion is connected to the outer wall surface of the body, and the top wall portion is connected to the top surface of the body.

9. The sound producing unit of claim 6, wherein: The bottom surface of the connecting part is set higher than the bottom surface of the main body.

10. The sound producing unit of claim 9, wherein: The height difference between the bottom surface of the connecting part and the bottom surface of the body is greater than or equal to the diameter of the lead wire.

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