sound production unit

Abstract

The utility model discloses a sound unit, including magnetic circuit subassembly, voice coil, diaphragm subassembly and skeleton, magnetic circuit subassembly includes upper yoke iron, lower yoke iron and respectively located on the center magnetic structure and the side magnetic structure of lower yoke iron, upper yoke iron cover is established on center magnetic structure and side magnetic structure, magnetic circuit subassembly has the first magnetic loop and the second magnetic loop of opposite direction, first magnetic loop passes through the upper portion of magnetic gap, and second magnetic loop passes through the lower portion of magnetic gap, voice coil is located in magnetic gap, diaphragm subassembly includes by inside and outside the inside fixed part, inside ring part, transition part, outside ring part and outside fixed part that link in proper order, inside fixed part is connected magnetic circuit subassembly, skeleton includes inside installation part, connecting part and outside installation part, and inside installation part is whole and presents ring frame shape, and inside installation part connects the top surface or bottom surface of voice coil, and the both ends of inside installation part are connected with connecting part respectively, and outside installation part connects transition part and connecting part. This sound unit has high performance and is not easy to drop the ring.

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 reserved for the sound unit is getting smaller and smaller, but the performance requirements for the sound unit are getting higher and higher. Existing sound units usually adopt a bottom magnetic circuit system solution, that is, the bottom end of the voice coil is located in the magnetic gap of the magnetic circuit component. However, when the voice coil vibrates upward, it will move away from the magnetic gap, resulting in poor symmetry and flatness of the BL. At the same time, there is only a magnetic circuit at one end of the voice coil, which greatly limits the performance improvement.

[0003] Based on this, the industry has introduced an upper and lower anti-magnetic circuit solution, which ensures that the voice coil is always in the magnetic gap when the sound unit is working, thereby improving the performance of the sound unit. The driving force of the voice coil in this solution is very strong, which requires the voice coil and the frame to have a strong bonding force, otherwise the voice coil may fall off. However, since the voice coil is in the magnetic gap for a large area, the area available for the voice coil to be bonded to the frame is small. As a result, in existing products, the frame and voice coil are fixed at two points, which poses a risk of voice coil falling off. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a high-performance sound unit that is less prone to coil dropout.

[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, a voice coil, a diaphragm assembly, and a frame. 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 structure. 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 magnetic circuit has a first magnetic circuit passing through the upper part of the magnetic gap and a second magnetic circuit passing through the lower part of the magnetic gap; the voice coil is located in the magnetic gap; the diaphragm assembly includes 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, and 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, the inner mounting part is generally ring-shaped, the inner mounting part is connected to the top or bottom surface of the voice coil, the two ends of the inner mounting part are respectively connected to the connecting part, and the outer mounting part is connected to the transition part and the connecting part.

[0006] In one embodiment, the connecting portion includes a first arm and a second arm connected together, the end of the first arm away from the second arm being connected to the outer mounting portion, and the end of the second arm away from the first arm being connected to the inner mounting portion.

[0007] In one embodiment, the connecting portion further includes a third arm, which connects the inner mounting portion and the second arm. The second arm is indirectly connected to the inner mounting portion through the third arm, and the side of the third arm near the voice coil is bonded and fixed to the voice coil.

[0008] In one embodiment, the first arm and the third arm are respectively perpendicular to the second arm.

[0009] In one embodiment, the inner mounting portion is located above the voice coil, the inner mounting portion is connected to the top surface of the voice coil, and the first arm and the third arm are located on the same side of the second arm.

[0010] In one embodiment, the inner mounting portion is located below the voice coil, the inner mounting portion is connected to the bottom surface of the voice coil, and the first arm and the third arm are located on opposite sides of the second arm.

[0011] In one embodiment, the frame further includes a reinforcing arm that connects the third arm to the two connecting portions.

[0012] In one embodiment, the top edge of the reinforcing arm is connected to the outer edge of the inner mounting portion.

[0013] In one embodiment, the reinforcing arm is bonded and fixed to the voice coil on the side closest to the voice coil.

[0014] In one embodiment, the number of reinforcing arms is two, and the two reinforcing arms are arranged opposite to each other.

[0015] The beneficial effects of this invention are as follows: In this sound-generating unit, the voice coil is located entirely within the magnetic gap, significantly improving the symmetry and flatness of the BL (Body Blur) and achieving high performance of the sound-generating unit. At the same time, by setting the inner mounting part of the frame into a ring shape and making it fit and fix the entire top or bottom surface of the voice coil, the traditional two-point fixing between the voice coil and the frame is transformed into continuous ring support. This allows for uniform stress distribution when the voice coil is subjected to strong driving force from the upper and lower anti-magnetic circuits, effectively suppressing the phenomenon of coil drop, and taking into account both the structural stability and acoustic performance improvement requirements of the sound-generating 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 an exploded view of the sound-generating unit in Embodiment 1;

[0018] Figure 2 A cross-sectional view of the sound-generating unit in Embodiment 1 Figure 1 ;

[0019] Figure 3 A cross-sectional view of the sound-generating unit in Embodiment 1 Figure 2 ;

[0020] Figure 4 This is a schematic diagram of the voice coil and frame in the sound-generating unit of Embodiment 1;

[0021] Figure 5 This is a cross-sectional view of the sound-generating unit in Embodiment 2;

[0022] Figure 6 A cross-sectional view of a sound-generating unit in Embodiment 3 Figure 1 ;

[0023] Figure 7 A cross-sectional view of a sound-generating unit in Embodiment 3 Figure 2 ;

[0024] Figure 8 This is a schematic diagram of the voice coil and frame in a sound-generating unit according to Embodiment 3;

[0025] Figure 9 This is a cross-sectional view of another sound-generating unit in Embodiment 3;

[0026] Figure 10 This is a schematic diagram of the voice coil and frame in another sound-generating unit of Embodiment 3.

[0027] Explanation of icon numbers:

[0028] 1. Pot stand;

[0029] 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; 25. Magnetic gap;

[0030] 3. Voice coil;

[0031] 4. Diaphragm assembly; 41. Inner fixing part; 42. Inner folding ring part; 43. Transition part; 44. Outer folding ring part; 45. Outer fixing part;

[0032] 5. Frame; 51. Internal mounting part; 52. Connecting part; 521. First arm; 522. Second arm; 523. Third arm; 524. Reinforcing arm; 53. External mounting part;

[0033] 6. Centering support. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Example 1

[0041] Please refer to Figures 1 to 4 The first embodiment of this utility model is as follows: a sound-generating unit, including a frame 1, a magnetic circuit assembly 2, a voice coil 3, a diaphragm assembly 4, and a frame 5. 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 25, which 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 25, and the second magnetic loop passes through the magnetic gap 25. The lower part of 5; the voice coil 3 is located in the magnetic gap 25; the diaphragm assembly 4 includes an inner fixing part 41, an inner folded ring part 42, a transition part 43, an outer folded ring part 44 and an outer fixing part 45 connected sequentially from the inside to the outside, the outer fixing part 45 is connected to the frame 1, the inner fixing part 41 is connected to the magnetic circuit assembly 2, preferably the inner fixing part 41 is connected to the upper yoke 21; the frame 5 includes an inner mounting part 51, a connecting part 52 and an outer mounting part 53, the inner mounting part 51 is generally in the shape of a ring frame, the inner mounting part 51 is connected to the top or bottom surface of the voice coil 3, the two ends of the inner mounting part 51 are respectively connected to the connecting part 52, the outer mounting part 53 is connected to the transition part 43 and the connecting part 52, specifically, the inner mounting part 51 is bonded and fixed to the voice coil 3, the inner mounting part 51 and the voice coil 3 form a ring frame-shaped bonding area.

[0042] 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 voice coil 3 is aligned or approximately aligned with the central washer 232, that is, when the sound-generating unit is not working, the voice coil 3 is centered within the magnetic gap 25 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.

[0043] The side magnetic structure 24 is provided corresponding to the long side of the central magnetic structure 23, and the connecting part 52 is located outside the end of the central magnetic structure 23.

[0044] The connecting part 52 includes a first arm 521 and a second arm 522 connected together. The end of the first arm 521 away from the second arm 522 is connected to the outer mounting part 53, and the end of the second arm 522 away from the first arm 521 is connected to the inner mounting part 51. Specifically, the first arm 521 is located on the side of the outer mounting part 53 away from the transition part 43, that is, below the outer mounting part 53. The function of the first arm 521 is to increase the distance between the inner folding ring part 42 and the second arm 522, thereby preventing the second arm 522 from colliding with the inner folding ring part 42 when the sound unit is working.

[0045] In at least some embodiments, the connecting portion 52 further includes a third arm 523, which connects the inner mounting portion 51 and the second arm 522. The second arm 522 is indirectly connected to the inner mounting portion 51 through the third arm 523. The side of the third arm 523 closest to the voice coil 3 is bonded and fixed to the voice coil 3. The third arm 523 bonded and fixed to the voice coil 3 not only improves the structural strength of the connecting portion 52 itself, but also further increases the bonding area between the frame 5 and the voice coil 3, thereby improving the stability of the connection between the two and reducing the risk of the sound unit falling off to a greater extent.

[0046] Optionally, the first arm 521 and the third arm 523 are perpendicular to the second arm 522.

[0047] In this embodiment, the inner mounting part 51 is located above the voice coil 3, the inner mounting part 51 is connected to the top surface of the voice coil 3, and the first arm 521 and the third arm 523 are located on the same side of the second arm 522.

[0048] In some embodiments, the sound-generating unit further includes a centering support 6 connecting the frame 1 and the voice coil 3. The centering support 6 is used to correct the deviation of the voice coil 3. In this embodiment, the voice coil 3 is connected to an external power source through the centering support 6.

[0049] Example 2

[0050] Please refer to Figure 5 The second embodiment of this utility model is a parallel technical solution to the first embodiment. The difference between the two embodiments is that the inner mounting part 51 is located below the voice coil 3. At this time, the inner mounting part 51 is connected to the bottom surface of the voice coil 3, and the first arm 521 and the third arm 523 are located on opposite sides of the second arm 522.

[0051] It is easy to understand that in actual products, the connecting part 52 may not have the third arm 523. In this case, the second arm 522 and the inner mounting part 51 are on the same horizontal plane, and the second arm 522 is directly connected to the inner mounting part 51.

[0052] Example 3

[0053] Please refer to Figures 6 to 10 The third embodiment of this utility model is a further improvement on the skeleton 5 based on the first embodiment. The difference from the first embodiment is that the skeleton 5 also includes a reinforcing arm 524. The reinforcing arm 524 connects the third arm 523 of the two connecting parts 52. The reinforcing arm 524 connecting the third arm 523 of the two connecting parts 52 can improve the structural strength of the skeleton 5 itself, reduce the risk of deformation of the skeleton 5, and facilitate the manufacturing and transportation of the skeleton 5.

[0054] Preferably, the top edge of the reinforcing arm 524 is connected to the outer edge of the inner mounting part 51, which can further improve the structural strength of the frame 5 itself.

[0055] In some embodiments, the reinforcing arm 524 is bonded and fixed to the voice coil 3 on the side closest to the voice coil 3, which can increase the bonding area between the frame 5 and the voice coil 3 to a greater extent and further reduce the risk of the voice coil 3 falling off.

[0056] In this embodiment, there are two reinforcing arms 524, which are arranged opposite to each other. That is, the reinforcing arms 524 are connected to both sides of the same third arm 523.

[0057] In one or more embodiments, the height of the reinforcing arm 524 is equal to the height of the third arm 523, which facilitates the processing and shaping of the frame 5 and the control of its dimensions.

[0058] When the third arm 523 is positioned above the second arm 522, the reinforcing arm 524 is close to the upper part of the voice coil 3, such as... Figure 7 and Figure 8 As shown; when the third arm 523 is located below the second arm 522, the reinforcing arm 524 is close to the lower part of the voice coil 3, as shown. Figure 9 and Figure 10 As shown.

[0059] 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: 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; The frame includes an inner mounting part, a connecting part, and an outer mounting part. The inner mounting part is generally in the shape of a ring frame. The inner mounting part is connected to the top or bottom surface of the voice coil. The two ends of the inner mounting part are respectively connected to the connecting part. The outer mounting part is connected to the transition part and the connecting part.

2. The sound-generating unit according to claim 1, characterized in that: The connecting part includes a first arm and a second arm connected together. The end of the first arm away from the second arm is connected to the outer mounting part, and the end of the second arm away from the first arm is connected to the inner mounting part.

3. The sound-generating unit according to claim 2, characterized in that: The connecting part further includes a third arm, which connects the inner mounting part and the second arm. The second arm is indirectly connected to the inner mounting part through the third arm, and the side of the third arm near the voice coil is bonded and fixed to the voice coil.

4. The sound-generating unit according to claim 3, characterized in that: The first arm and the third arm are perpendicular to the second arm, respectively.

5. The sound-generating unit according to claim 3, characterized in that: The inner mounting portion is located above the voice coil and is connected to the top surface of the voice coil. The first arm and the third arm are located on the same side of the second arm.

6. The sound-generating unit according to claim 3, characterized in that: The inner mounting portion is located below the voice coil and is connected to the bottom surface of the voice coil. The first arm and the third arm are located on opposite sides of the second arm.

7. The sound-generating unit according to claim 3, characterized in that: The frame also includes a reinforcing arm that connects the third arm to the two connecting portions.

8. The sound-generating unit according to claim 7, characterized in that: The top edge of the reinforcing arm connects to the outer edge of the inner mounting portion.

9. The sound-generating unit according to claim 7, characterized in that: The reinforcing arm is bonded and fixed to the voice coil on the side closest to the voice coil.

10. The sound-generating unit according to claim 7, characterized in that: The number of reinforcing arms is two, and the two reinforcing arms are arranged opposite to each other.

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