sound production unit

Abstract

The utility model discloses a sounding unit, including voice coil, magnetic circuit subassembly and shaping support piece, magnetic circuit subassembly includes yoke and respectively located on the center magnetic structure and side magnetic structure of yoke, and the magnetic gap that forms for voice coil activity between center magnetic structure and side magnetic structure, and center magnetic structure includes center hua si and the center magnetic steel of connecting yoke, and center hua si is located the top of center magnetic steel, and the bottom surface of magnetic circuit subassembly is equipped with blind hole, and blind hole is connected the bottom surface of yoke with the top surface of center magnetic steel, the shaping support piece includes the outer mounting portion, cantilever portion and inner mounting portion that are connected in proper order from outside to inside, and the outer mounting portion is connected voice coil, and the inner mounting portion is located between center magnetic steel and center hua si and is connected center magnetic steel and center hua si respectively, and the inner mounting portion is connected with extension arm, and the outer mounting portion is equipped with the inner soldering pad of electrically conducting with voice coil, and the exposed soldering pad of electrically conducting with inner soldering pad is equipped on extension arm, and the exposed soldering pad is located in blind hole.

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 a commonly used electroacoustic transducer that converts electrical energy into sound energy, the sound-generating unit plays an indispensable role in amplification systems. With the rapid development of consumer electronics products such as mobile phones and tablets, especially large wearable electronic devices such as AR / VR, the sound-generating unit, as an important component of these products, faces increasingly higher requirements in terms of performance and size.

[0003] To correct the deviation of the voice coil, a shaping support is installed inside the driver unit. However, the shaping support occupies the installation space of the side magnet structure, which reduces the overall volume of the side magnet structure and makes it more difficult to improve the performance of the driver unit. Utility Model Content

[0004] The technical problem to be 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] Voice coil;

[0007] A magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. A magnetic gap is formed between the central magnetic structure and the side magnetic structure to allow the voice coil to move. The central magnetic structure includes a central washer and a central magnet connected to the yoke. The central washer is located above the central magnet. A blind hole is provided in the bottom surface of the magnetic circuit assembly, and the blind hole connects the bottom surface of the yoke and the top surface of the central magnet.

[0008] A shaping support includes an outer mounting portion, a cantilever portion, and an inner mounting portion connected sequentially from the outside to the inside. The outer mounting portion is connected to the voice coil. The inner mounting portion is located between the center magnet and the center washer and is connected to the center magnet and the center washer respectively. The inner mounting portion is connected to an extension arm. The outer mounting portion is provided with an inner solder pad that is electrically connected to the voice coil. The extension arm is provided with an exposed solder pad that is electrically connected to the inner solder pad. The exposed solder pad is located inside the blind hole.

[0009] Furthermore, the region of the extension arm located within the blind hole is fixed to the bottom surface of the central washer.

[0010] Furthermore, the external mounting part is generally in the shape of a ring frame.

[0011] Furthermore, the blind hole is disposed in the central region of the central magnetic structure.

[0012] Furthermore, the inner mounting part is generally in the shape of a ring frame.

[0013] Furthermore, the inner mounting part is generally rectangular in shape, and at least one of the long axis side and the short axis side of the inner mounting part is connected to the cantilever part.

[0014] Furthermore, the edge magnetic structure is in the form of a continuous ring frame.

[0015] Furthermore, the edge magnetic structure includes multiple edge magnetic components, which are arranged in a ring-like shape, with adjacent edge magnetic components close to each other.

[0016] Furthermore, two adjacent edge magnetic components are in contact with each other.

[0017] Furthermore, the outer edge of the yoke has an upwardly bent vertical wall, the vertical wall being generally ring-shaped, and also includes a diaphragm assembly connected to the voice coil, the outer edge of the diaphragm assembly being connected to the vertical wall.

[0018] The beneficial effects of this invention are as follows: The shaping support plate in this sound-generating unit is located inside the voice coil, thus not occupying the installation space of the side magnetic structure. This allows for a larger overall volume of the side magnetic structure, increasing the magnetic field strength of the magnetic circuit components and improving the performance of the sound-generating unit. Since the magnetic utilization rate of the central region of the central magnetic structure is low, the blind hole's placement corresponding to the central region of the central magnetic structure minimizes the impact of the blind hole on the magnetic field strength of the sound-generating unit, allowing for more efficient use of the internal space of the sound-generating unit. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the sound-generating unit;

[0020] Figure 2 This is a cross-sectional view of the sound-generating unit;

[0021] Figure 3 This is a structural diagram of the internal structure of the sound-generating unit;

[0022] Figure 4 This is a schematic diagram of the structure of the shaping support in the sound-generating unit.

[0023] Label Explanation:

[0024] 1. Diaphragm assembly;

[0025] 2. Voice coil;

[0026] 3. Magnetic circuit assembly; 31. Yoke; 311. Vertical wall; 32. Central magnetic structure; 321. Central washer; 322. Central magnet; 33. Side magnetic structure; 34. Blind hole;

[0027] 4. Shaping support plate; 41. External mounting part; 42. Cantilever part; 43. Internal mounting part; 44. Extension arm; 45. Internal solder pad; 46. Exposed solder pad. Detailed Implementation

[0028] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0029] Please refer to Figures 1 to 4 The sound-generating unit includes a voice coil 2, a magnetic circuit assembly 3, and a shaping support 4. The magnetic circuit assembly 3 includes a yoke 31 and a central magnetic structure 32 and a side magnetic structure 33 respectively disposed on the yoke 31. A magnetic gap is formed between the central magnetic structure 32 and the side magnetic structure 33 to allow the voice coil 2 to move. The central magnetic structure 32 includes a central washer 321 and a central magnet 322 connecting the yoke 31. The central washer 321 is located above the central magnet 322. A blind hole 34 is provided in the bottom surface of the magnetic circuit assembly 3, and the blind hole 34 connects the bottom surface of the yoke 31 with the central magnet 322. Top surface; the shaping support 4 includes an outer mounting part 41, a cantilever part 42 and an inner mounting part 43 connected sequentially from the outside to the inside. The outer mounting part 41 is connected to the voice coil 2. The inner mounting part 43 is located between the center magnet 322 and the center washer 321 and is connected to the center magnet 322 and the center washer 321 respectively. The inner mounting part 43 is connected to an extension arm 44. The outer mounting part 41 is provided with an inner solder pad 45 that is electrically connected to the voice coil 2. The extension arm 44 is provided with an exposed solder pad 46 that is electrically connected to the inner solder pad 45. The exposed solder pad 46 is located in the blind hole 34.

[0030] As can be seen from the above description, the beneficial effects of this utility model are as follows: the shaping support 4 in this sound-generating unit is located inside the voice coil 2, and does not occupy the installation space of the side magnetic structure 33, so that the overall volume of the side magnetic structure 33 can be set to be larger, which is conducive to improving the performance of the sound-generating unit. Since the magnetic utilization rate of the central region of the central magnetic structure 32 is low, the blind hole 34 is set in the central region of the central magnetic structure 32, which can minimize the impact of the blind hole 34 on the magnetic field strength of the sound-generating unit, so that the internal space of the sound-generating unit can be more fully utilized.

[0031] Furthermore, the region of the extension arm 44 located within the blind hole 34 is fixed to the bottom surface of the central washer 321.

[0032] As can be seen from the above description, the sound-generating unit has strong structural stability and can form a stable electrical connection with an external power source.

[0033] Furthermore, the blind hole 34 is disposed in the central region of the central magnetic structure 32.

[0034] As can be seen from the above description, the blind hole 34 is set in the central region of the central magnetic structure 32 to minimize the impact of the blind hole 34 on the magnetic field strength of the sound unit, thereby ensuring the performance of the sound unit.

[0035] Furthermore, the external mounting part 41 is generally in the shape of a ring frame.

[0036] Furthermore, the inner mounting portion 43 is generally in the shape of a ring frame.

[0037] As can be seen from the above description, the shaping support 4 is an integral structure, which is conducive to further simplifying the structure of the sound-generating unit.

[0038] Furthermore, the inner mounting portion 43 is generally rectangular, and at least one of the long axis side and the short axis side of the inner mounting portion 43 is connected to the cantilever portion 42.

[0039] As can be seen from the above description, the number and position of the cantilever section 42 can be set as needed, which helps to enrich the diversity of the shaping support 4.

[0040] Furthermore, the edge magnetic structure 33 is in the shape of a continuous ring frame.

[0041] As can be seen from the above description, the large overall volume of the edge magnetic structure 33 is beneficial for enhancing the magnetic field strength of the sound unit and improving the performance of the sound unit.

[0042] Furthermore, the edge magnetic structure 33 includes a plurality of edge magnetic components, which are arranged in a ring-like shape, with adjacent edge magnetic components close to each other.

[0043] As can be seen from the above description, there are various options for the specific construction of the edge magnetic structure 33, which helps to enrich the diversity of the sound generating unit.

[0044] Furthermore, two adjacent edge magnetic components are in contact with each other.

[0045] As can be seen from the above description, the large overall volume of the edge magnetic structure 33 is beneficial to improving the performance of the sound-generating unit.

[0046] Furthermore, the outer edge of the yoke 31 has an upwardly bent vertical wall 311, the vertical wall 311 is generally in the shape of a ring frame, and also includes a diaphragm assembly 1 connected to the voice coil 2, the outer edge of the diaphragm assembly 1 being connected to the vertical wall 311.

[0047] As can be seen from the above description, since the exposed solder pad 46 of the shaping support plate 4 is located inside the blind hole 34, there is no need to leave any space on the outside of the sound unit. Therefore, the vertical wall 311 can replace the frame in a ring to bond the diaphragm, saving the frame material, further simplifying the structure of the sound unit, facilitating the assembly and production of the sound unit, and helping to reduce the manufacturing cost of the sound unit.

[0048] Please refer to Figures 1 to 4 One embodiment of this utility model is as follows: a sound-generating unit, including a diaphragm assembly 1, a voice coil 2, a magnetic circuit assembly 3, and a shaping support 4. The magnetic circuit assembly 3 includes a yoke 31 and a central magnetic structure 32 and a side magnetic structure 33 respectively disposed on the yoke 31. A magnetic gap is formed between the central magnetic structure 32 and the side magnetic structure 33 for the voice coil 2 to move. The central magnetic structure 32 includes a central washer 321 and a central magnet 322 connecting the yoke 31. The central washer 321 is located above the central magnet 322. A blind hole 34 is provided in the bottom surface of the magnetic circuit assembly 3, and the blind hole 34 connects the bottom surface of the yoke 31 and the top surface of the central magnet 322. Preferably, the blind hole 34 is disposed in the central area of ​​the central magnetic structure 32. The outer edge of the yoke 31 has an upwardly bent vertical wall 311, and the vertical wall 311 is generally in the shape of a ring frame. The diaphragm assembly 1 is connected to the voice coil 2, and the outer edge of the diaphragm assembly 1 is connected to the vertical wall 311. The shaping support 4 includes an outer mounting part 41, a cantilever part 42, and an inner mounting part 43 connected sequentially from the outside to the inside. The outer mounting part 41 is connected to the voice coil 2. Preferably, the outer mounting part 41 is connected to the bottom surface of the voice coil 2. The inner mounting part 43 is located between the center magnet 322 and the center washer 321 and is connected to the center magnet 322 and the center washer 321 respectively. The inner mounting part 43 is connected to an extension arm 44. The outer mounting part 41 is provided with an inner solder pad 45 that is electrically connected to the voice coil 2. The extension arm 44 is provided with an exposed solder pad 46 that is electrically connected to the inner solder pad 45. The exposed solder pad 46 is located in the blind hole 34. Preferably, the area of ​​the extension arm 44 located in the blind hole 34 is fixed to the bottom surface of the center washer 321.

[0049] In one or more embodiments, the outer mounting portion 41 is generally in the shape of a ring frame, and the inner pad 45 is located at the corner of the outer mounting portion 41.

[0050] In some embodiments, the inner mounting portion 43 is generally ring-shaped; optionally, the inner mounting portion 43 is generally rectangular. At least one of the major axis and minor axis of the inner mounting portion 43 is connected to the cantilever portion 42. In this embodiment, the major axis and minor axis of the inner mounting portion 43 are respectively connected to the cantilever portion 42. As a preferred embodiment, the shaping support 4 has a planar symmetrical structure or a central symmetrical structure.

[0051] Preferably, the edge magnetic structure 33 is in the shape of a continuous ring frame. In this embodiment, the edge magnetic structure 33 includes an annular edge magnet and an annular washer. The annular edge magnet is an integral structural component, and the annular washer is an integral structural component. This not only allows the overall volume of the edge magnetic structure 33 to be larger, but also reduces the number of assembly parts of the sound unit, making it easier to assemble and produce the sound unit.

[0052] In other embodiments, the edge magnetic structure 33 includes a plurality of edge magnetic components, which are arranged in a ring-like shape, with adjacent edge magnetic components close to each other. In this case, it is preferable that adjacent edge magnetic components are in contact with each other; specifically, at least one end face of one edge magnetic component contacts the side wall of another adjacent edge magnetic component.

[0053] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sound-generating unit, characterized in that, include Voice coil; A magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. A magnetic gap is formed between the central magnetic structure and the side magnetic structure to allow the voice coil to move. The central magnetic structure includes a central washer and a central magnet connected to the yoke. The central washer is located above the central magnet. A blind hole is provided in the bottom surface of the magnetic circuit assembly, and the blind hole connects the bottom surface of the yoke and the top surface of the central magnet. A shaping support includes an outer mounting portion, a cantilever portion, and an inner mounting portion connected sequentially from the outside to the inside. The outer mounting portion is connected to the voice coil. The inner mounting portion is located between the center magnet and the center washer and is connected to the center magnet and the center washer respectively. The inner mounting portion is connected to an extension arm. The outer mounting portion is provided with an inner solder pad that is electrically connected to the voice coil. The extension arm is provided with an exposed solder pad that is electrically connected to the inner solder pad. The exposed solder pad is located inside the blind hole.

2. The sound-generating unit according to claim 1, characterized in that, The area of ​​the extension arm located within the blind hole is fixed to the bottom surface of the central washer.

3. The sound-generating unit according to claim 1, characterized in that, The external mounting part is generally in the shape of a ring frame.

4. The sound-generating unit according to claim 1, characterized in that, The blind hole is located in the central region of the central magnetic structure.

5. The sound-generating unit according to claim 1, characterized in that, The internal mounting section is generally in the shape of a ring frame.

6. The sound-generating unit according to claim 5, characterized in that, The inner mounting part is generally rectangular, and at least one of the long axis side and the short axis side of the inner mounting part is connected to the cantilever part.

7. The sound-generating unit according to claim 1, characterized in that, The edge magnetic structure is in the shape of a continuous ring frame.

8. The sound-generating unit according to claim 1, characterized in that, The edge magnetic structure includes multiple edge magnetic components, which are arranged in a ring-like shape with adjacent edge magnetic components close to each other.

9. The sound-generating unit according to claim 8, characterized in that, The two adjacent edge magnetic components are in contact with each other.

10. The sound-generating unit according to claim 1, characterized in that, The outer edge of the yoke has an upwardly curved vertical wall, which is generally in the shape of a ring frame. It also includes a diaphragm assembly that connects to the voice coil, with the outer edge of the diaphragm assembly connected to the vertical wall.

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