Sound unit

Abstract

This utility model discloses a sound-generating unit, including a magnetic circuit assembly, a voice coil, a diaphragm assembly, a 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 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 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 voice coil includes a connected body and a lead wire. The diaphragm assembly includes an inner fixing part, an inner folded loop part, a transition part, an outer folded loop part, and an outer fixing part connected sequentially from the inside out. The inner fixing part is connected to the magnetic circuit assembly. The frame includes an inner mounting part, a connecting part, and an outer mounting part connected sequentially. This sound-generating unit 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 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, comprising a connected body and leads, wherein the body is located within 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] The frame includes an inner mounting part, a connecting part, and an outer mounting part connected in sequence. The inner mounting part is connected to the voice coil, and the outer mounting part is connected to the transition part.

[0010] The centering support includes an outer structural part, a cantilever part, a lifting part and an extension part connected in sequence. The extension part is fixed on the frame and has a solder pad for welding to the lead wire.

[0011] In one embodiment, the outer mounting portion of the frame has an extension arm extending toward the lower yoke, and the centering support further includes an inner structural portion fixedly connected to the extension arm, with the cantilever portion and the lifting portion connected through the inner structural portion.

[0012] In one embodiment, the extension arm is formed by bending a portion of the outer mounting portion.

[0013] 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.

[0014] In one embodiment, the extension is fixed to the outer mounting portion.

[0015] In one embodiment, the extension is provided with two pads, and the number of leads is two, with the two leads being soldered to the two pads one-to-one.

[0016] In one embodiment, there are two centering supports, and the two ends of the central magnetic structure are respectively provided with the centering supports. There are two leads, and the two leads are welded to the two centering supports one by one.

[0017] In one embodiment, the extension includes a first part and a second part connected together, the end of the first part away from the second part being connected to the lifting part, the pad being disposed on the second part, the first part being fixed to the outer mounting part, and the second part being fixed to the connecting part.

[0018] 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 voice coil, and the top wall portion being connected to the top surface of the voice coil.

[0019] In one embodiment, the bottom surface of the connecting portion is set higher than the bottom surface of the voice coil.

[0020] The beneficial effects of this invention are as follows: The sound-generating unit has a novel structure. During vibration, both the upper and lower parts of the voice coil move within the magnetic gap and do not exceed it. This improves the symmetry and flatness of the BL (Boundary Line) and the sensitivity of the sound-generating unit, thereby enhancing its acoustic performance. Furthermore, the large overall volume of the magnetic circuit components in this sound-generating unit and the long effective length of the voice coil within the magnetic gap significantly increase the BL value, further improving its performance. Additionally, the staggered arrangement of the voice coil and diaphragm assembly prevents the diaphragm assembly from occupying the upper portion of the voice coil. The square space allows the voice coil to vibrate with a larger amplitude while maintaining a slim profile, which helps to improve the loudness of the driver. In addition, the centering support has an extension fixed to the frame, which is soldered to the lead wire of the voice coil through the pads on the extension. Compared with the method of directly fixing the centering support to the voice coil, the centering support of this driver does not occupy too much horizontal and vertical space, allowing the side magnet structure to have more space to improve the B value of the driver. At the same time, it allows the voice coil to have a larger amplitude, further improving the performance of the driver. 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 schematic diagram of a portion of the structure 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 3.

[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;

[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. Lifting part; 65. Extension part; 651. First part; 652. Second part. 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 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. The magnetic gap surrounds the central magnetic structure 23 and is located between the upper yoke 21 and the lower yoke 22. The magnetic circuit assembly 2 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 magnetic gap. The lower part; 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 outer fixing part 35 is connected to the frame 1, and the inner fixing part 31 is connected to the magnetic circuit assembly 2. Preferably, the inner fixing part 31 is connected to the upper yoke 21. The material of the frame 4 can be magnesium-aluminum alloy, aluminum-magnesium alloy, etc. The frame 4 includes an inner mounting part 41, a connecting part 42 and an outer mounting part 43 connected sequentially. The inner mounting part 41 is connected to the body 51 of the voice coil 5, and the outer mounting part 43 is connected to the transition part 33. There are two centering supports 6. The two ends of the central magnetic structure 23 are respectively provided with centering supports 6. The centering supports 6 include an outer structure part 61, a cantilever part 62, a lifting part 64 and an extension part 65 connected sequentially. The extension part 65 is fixed on the frame 4 and has a solder pad for welding to the lead wire 52.

[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] To improve the stability of the connection between the frame 4 and the centering support 6, in this embodiment, the outer mounting portion 43 of the frame 4 has an extension arm 44 extending toward the lower yoke 22, and the centering support 6 further includes an inner structural portion 63 fixedly connected to the extension arm 44. The cantilever portion 62 and the lifting portion 64 are connected through the inner structural portion 63. In one or more embodiments, the extension arm 44 is formed by bending a portion of the outer mounting portion 43.

[0047] In some embodiments, the outer mounting portion 43 is generally in the shape of a ring frame. The overall ring frame shape of the outer mounting portion 43 facilitates the assembly with the diaphragm assembly 3 and also has higher structural strength. 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.

[0048] In one or more embodiments, the extension 65 is fixed to the external mounting portion 43. In this embodiment, the extension 65 of one centering support piece 6 is provided with two pads, and the number of leads 52 is two, with the two leads 52 being welded to the two pads one by one.

[0049] 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.

[0050] 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.

[0051] Example 2

[0052] like Figure 5 As shown, Embodiment 2 is a parallel technical solution to Embodiment 1. The difference between Embodiment 1 and Embodiment 2 is that the two centering support plates 6 in the sound-generating unit have the same structure, both of which have extensions 65. The two leads 52 of the voice coil 5 are welded one-to-one with the pads on the extensions 65 of the two centering support plates 6.

[0053] Example 3

[0054] like Figure 6 As shown, Embodiment 3 is a parallel technical solution to Embodiment 2. The difference between Embodiment 3 and Embodiment 2 is that the extension 65 includes a first part 651 and a second part 652 connected together. The end of the first part 651 away from the second part 652 is connected to the lifting part 64. The solder pad is provided on the second part 652. The first part 651 is fixed on the outer mounting part 43, and the second part 652 is fixed on the connecting part 42.

[0055] 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.

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