sound production unit

Abstract

This utility model discloses a sound-generating unit, including a magnetic circuit assembly, a voice coil, and a centering support. The magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. The side magnetic structure is arranged around the central magnetic structure, and a magnetic gap is formed between the central magnetic structure and the side magnetic structure. The central magnetic structure includes a central magnet and a central washer located above the central magnet. The central magnet has a first through hole, and the yoke has a second through hole communicating with the first through hole. The voice coil is located in the magnetic gap. The centering support includes an outer fixing part, a cantilever part, an inner fixing part, and a bending part connected in sequence. The outer fixing part is fixedly connected to the voice coil and has an inner pad electrically connected to the voice coil. The inner fixing part is disposed between the central magnet and the central washer. The bending part is fixedly connected to the inner wall of the first through hole and has an outer pad electrically connected to the inner pad. This sound-generating unit improves performance without increasing the overall volume of the sound-generating unit.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic transducer 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 the sound amplifier system.

[0003] With the development of consumer electronics products such as mobile phones and tablets, the performance requirements for thinner and lighter sound units are getting higher and higher. The internal space of existing sound units is not used reasonably. Without increasing the size of the sound unit, the total volume of the magnetic circuit components cannot be set to be larger, which makes it difficult to improve the performance of the sound unit. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a lightweight and thin high-performance sound 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 a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. The side magnetic structure is arranged around the central magnetic structure, and a magnetic gap is formed between the central magnetic structure and the side magnetic structure. The central magnetic structure includes a central magnet and a central washer located above the central magnet. The central magnet is provided with a first through hole, and the yoke has a second through hole communicating with the first through hole.

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

[0008] A centering support includes an outer fixing part, a cantilever part, an inner fixing part, and a bending part connected in sequence. The outer fixing part is fixedly connected to the voice coil and has an inner pad electrically connected to the voice coil. The inner fixing part is located between the center magnet and the center washer. The bending part is fixedly connected to the inner wall of the first through hole and has an outer pad electrically connected to the inner pad.

[0009] Furthermore, the bottom surface of the inner fixing part is fixedly connected to the top surface of the central magnet, and the top surface of the inner fixing part is fixedly connected to the bottom surface of the central washer.

[0010] Furthermore, the outer fixing part is rectangular in shape, and the bottom surface of the voice coil is fixedly connected to the outer fixing part.

[0011] Furthermore, at least one set of opposite sides of the external fixing part is respectively connected to the cantilever part.

[0012] Furthermore, the bottom of the bent portion is fixedly connected to the inner wall of the second through hole.

[0013] Furthermore, the first through hole is located in the central region of the central magnet.

[0014] Furthermore, the edge magnetic structure includes an edge magnet and an edge washer. The bottom surface of the edge magnet is connected to the yoke, and the top surface of the edge magnet is connected to the edge washer. The edge magnet is a continuous and complete frame structure. Alternatively, the edge magnet includes multiple sub-magnets, which are arranged in a frame structure, with adjacent sub-magnets in contact with each other.

[0015] Furthermore, the yoke includes a body and a flange provided along the edge of the body. The second through hole, the central magnetic structure and the side magnetic structure are respectively provided on the body. The outer wall surface of the side magnetic structure is fixedly connected to the inner wall surface of the flange.

[0016] Furthermore, the edge magnet is bonded to the flange; and / or,

[0017] The edge wash is welded or bonded to the flange.

[0018] Furthermore, it also includes a diaphragm assembly that connects the voice coil and the flange.

[0019] The beneficial effects of this utility model are as follows: The sound-generating unit has a novel structure. The central magnetic structure is provided with a first through hole, and the outer solder pad of the centering support is located in the first through hole. There is no need to reserve space for the outer solder pad and cantilever on the outside of the voice coil, so that the total volume of the side magnetic structure can be set to be larger, thereby improving the BL value of the sound-generating unit. This achieves the goal of improving the performance of the sound-generating unit without increasing the overall volume of the sound-generating unit. Attached Figure Description

[0020] Figure 1 An exploded view of the sound-generating unit;

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

[0022] Figure 3 This is a schematic diagram of the sound-generating unit.

[0023] Label Explanation:

[0024] 1. Diaphragm assembly;

[0025] 2. Yoke; 21. Second through hole; 22. Body; 23. Flanged edge;

[0026] 3. Central magnetic structure; 31. Central magnet; 311. First through hole; 32. Central washer;

[0027] 4. Edge magnetic structure; 41. Edge magnet; 42. Edge washer;

[0028] 5. Voice coil;

[0029] 6. Centering support; 61. External fixation part; 62. Cantilever part; 63. Internal fixation part; 64. Bending part. Detailed Implementation

[0030] 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.

[0031] Please refer to Figures 1 to 3 The sound-generating unit includes a magnetic circuit assembly, a voice coil 5, and a centering support 6. The magnetic circuit assembly includes a yoke 2 and a central magnetic structure 3 and a side magnetic structure 4 respectively disposed on the yoke 2. The side magnetic structure 4 is arranged around the central magnetic structure 3, and a magnetic gap is formed between the central magnetic structure 3 and the side magnetic structure 4. The central magnetic structure 3 includes a central magnet 31 and a central washer 32 located above the central magnet 31. The central magnet 31 is provided with a first through hole 311, and the yoke 2 has a connection to the first through hole 311. The second through hole 21; the voice coil 5 is located in the magnetic gap; the centering support 6 includes an outer fixing part 61, a cantilever part 62, an inner fixing part 63 and a bending part 64 connected in sequence. The outer fixing part 61 is fixedly connected to the voice coil 5. The outer fixing part 61 has an inner solder pad that is electrically connected to the voice coil 5. The inner fixing part 63 is located between the central magnet 31 and the central washer 32. The bending part 64 is fixedly connected to the inner wall of the first through hole 311. The bending part 64 has an outer solder pad that is electrically connected to the inner solder pad.

[0032] As can be seen from the above description, the beneficial effects of this utility model are as follows: The sound-generating unit has a novel structure. The central magnetic structure 3 is provided with a first through hole 311, and the outer solder pad of the centering support plate 6 is located inside the first through hole 311. There is no need to reserve space for the outer solder pad and the cantilever part 62 on the outside of the voice coil 5, so that the total volume of the side magnetic structure 4 can be set to be larger, thereby improving the BL value of the sound-generating unit and achieving the goal of improving the performance of the sound-generating unit without increasing the outline volume of the sound-generating unit.

[0033] Furthermore, the bottom surface of the inner fixing part 63 is fixedly connected to the top surface of the central magnet 31, and the top surface of the inner fixing part 63 is fixedly connected to the bottom surface of the central washer 32.

[0034] As can be seen from the above description, the inner fixing part 63 is closely connected to the central magnetic structure 3, which helps to improve the structural stability of the sound unit.

[0035] Furthermore, the outer fixing part 61 is rectangular in shape, and the bottom surface of the voice coil 5 is fixedly connected to the outer fixing part 61.

[0036] As can be seen from the above description, the larger bonding surface between the centering support 6 and the voice coil 5 is beneficial to improving the stability of the connection between the centering support 6 and the voice coil 5.

[0037] Furthermore, at least one pair of opposite sides of the external fixing part 61 are respectively connected to the cantilever part 62.

[0038] As can be seen from the above description, the centering support 6 has a stable structure.

[0039] Furthermore, the bottom of the bent portion 64 is fixedly connected to the inner wall of the second through hole 21.

[0040] As can be seen from the above description, the bent part 64 is connected to both the central magnet 31 and the yoke 2, which helps to ensure the stability of the connection between the bent part 64 and the magnetic circuit assembly and improves the warping phenomenon of the bent part 64.

[0041] Furthermore, the first through hole 311 is located in the central region of the central magnet 31.

[0042] As can be seen from the above description, the magnetic utilization rate of the central region of the central magnet 31 is low. Placing the first through hole 311 in the central region of the central magnet 31 can effectively reduce the influence of the first through hole 311 on the magnetic field of the central magnet 31.

[0043] Furthermore, the edge magnetic structure 4 includes an edge magnet 41 and an edge washer 42. The bottom surface of the edge magnet 41 is connected to the yoke 2, and the top surface of the edge magnet 41 is connected to the edge washer 42. The edge magnet 41 is a continuous and complete frame structure, or the edge magnet 41 includes multiple sub-magnets, and the multiple sub-magnets are arranged in a frame structure, with adjacent sub-magnets in contact with each other.

[0044] As can be seen from the above description, the overall volume of the edge magnet 41 can be set to be relatively large, which is conducive to enhancing the magnetic field strength of the sound unit, increasing the BL value of the sound unit, and thus improving the performance of the sound unit.

[0045] Furthermore, the yoke 2 includes a body 22 and a flange 23 disposed along the edge of the body 22. The second through hole 21, the central magnetic structure 3 and the side magnetic structure 4 are respectively disposed on the body 22. The outer wall surface of the side magnetic structure 4 is fixedly connected to the inner wall surface of the flange 23.

[0046] As can be seen from the above description, the fixed connection between the outer wall of the edge magnetic structure 4 and the inner wall of the flange 23 is beneficial to improving the structural stability of the magnetic circuit assembly.

[0047] Furthermore, the edge magnet 41 is bonded to the flange 23; and / or,

[0048] The edge washer 42 is welded or bonded to the flange 23.

[0049] As can be seen from the above description, there are multiple ways to connect the edge magnetic structure 4 and the flange 23, which helps to enrich the diversity of the sound-generating unit.

[0050] Furthermore, it also includes a diaphragm assembly 1, which connects the voice coil 5 and the flange 23.

[0051] As can be seen from the above description, the flange 23 can be used as a basin stand, saving the basin stand material and thus reducing the manufacturing cost of the sound unit.

[0052] Please refer to Figures 1 to 3 The first embodiment of this utility model is as follows: a sound-generating unit, including a diaphragm assembly 1, a magnetic circuit assembly, a voice coil 5, and a centering support 6. The magnetic circuit assembly includes a yoke 2 and a central magnetic structure 3 and a side magnetic structure 4 respectively disposed on the yoke 2. The side magnetic structure 4 is arranged around the central magnetic structure 3, and a magnetic gap is formed between the central magnetic structure 3 and the side magnetic structure 4. The voice coil 5 is located in the magnetic gap. The central magnetic structure 3 includes a central magnet 31 and a central washer 32 located above the central magnet 31. The central magnet 31 is provided with a first through hole 311, preferably the first through hole 311. 1 is located in the central region of the central magnet 31; the yoke 2 has a second through hole 21 that connects to the first through hole 311; the centering support 6 includes an outer fixing part 61, a cantilever part 62, an inner fixing part 63 and a bending part 64 connected in sequence, the outer fixing part 61 is fixedly connected to the voice coil 5, the outer fixing part 61 has an inner solder pad that is electrically connected to the voice coil 5, the inner fixing part 63 is located between the central magnet 31 and the central washer 32, the bending part 64 is fixedly connected to the inner wall of the first through hole 311, and the bending part 64 has an outer solder pad that is electrically connected to the inner solder pad.

[0053] In this embodiment, the yoke 2 includes a body 22 and a flange 23 disposed along the edge of the body 22. The second through hole 21, the central magnetic structure 3, and the side magnetic structure 4 are respectively disposed on the body 22. The diaphragm assembly 1 connects the voice coil 5 and the flange 23. Optionally, the flange 23 is formed by bending a portion of the body 22.

[0054] The bottom surface of the inner fixing part 63 is fixedly connected to the top surface of the central magnet 31, and the top surface of the inner fixing part 63 is fixedly connected to the bottom surface of the central washer 32. Optionally, the inner fixing part 63 is bonded to both the central magnet 31 and the central washer 32. In one or more embodiments, the area of ​​the top surface of the central magnet 31 not covered by the inner fixing part 63 is bonded to the bottom surface of the central washer 32, which can further improve the stability of the connection between the centering support 6 and the central magnetic structure 3.

[0055] To improve the stability of the connection between the external fixing part 61 and the voice coil 5, the external fixing part 61 is rectangular in shape, and the bottom surface of the voice coil 5 is fixedly connected to the external fixing part 61. In this embodiment, the bottom surface of the voice coil 5 is bonded to the external fixing part 61.

[0056] Preferably, at least one pair of opposite sides of the external fixing part 61 are respectively connected to the cantilever part 62. In this embodiment, the four sides of the external fixing part 61 are respectively connected to the cantilever part 62, and the force on the centering support 6 is distributed, which helps to extend the service life of the centering support 6.

[0057] In one or more embodiments, the bottom of the bent portion 64 is fixedly connected to the inner wall of the second through hole 21.

[0058] The edge magnetic structure 4 includes an edge magnet 41 and an edge washer 42. The bottom surface of the edge magnet 41 is connected to the yoke 2, and the top surface of the edge magnet 41 is connected to the edge washer 42. In this embodiment, the edge magnet 41 is a continuous and complete frame structure. In other embodiments, the edge magnet 41 includes multiple sub-magnets, which are arranged in a frame structure, with adjacent sub-magnets in contact with each other.

[0059] Optionally, the outer wall surface of the edge magnetic structure 4 is fixedly connected to the inner wall surface of the flange 23. Specifically, the edge magnet 41 is bonded to the flange 23; and / or, the edge washer 42 is welded or bonded to the flange 23.

[0060] 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 A magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. The side magnetic structure is arranged around the central magnetic structure, and a magnetic gap is formed between the central magnetic structure and the side magnetic structure. The central magnetic structure includes a central magnet and a central washer located above the central magnet. The central magnet is provided with a first through hole, and the yoke has a second through hole communicating with the first through hole. A voice coil located in the magnetic gap; A centering support includes an outer fixing part, a cantilever part, an inner fixing part, and a bending part connected in sequence. The outer fixing part is fixedly connected to the voice coil and has an inner pad electrically connected to the voice coil. The inner fixing part is located between the center magnet and the center washer. The bending part is fixedly connected to the inner wall of the first through hole and has an outer pad electrically connected to the inner pad.

2. The sound-generating unit according to claim 1, characterized in that, The bottom surface of the inner fixing part is fixedly connected to the top surface of the central magnet, and the top surface of the inner fixing part is fixedly connected to the bottom surface of the central washer.

3. The sound-generating unit according to claim 1, characterized in that, The external fixing part is rectangular in shape, and the bottom surface of the voice coil is fixedly connected to the external fixing part.

4. The sound-generating unit according to claim 3, characterized in that, The external fixing part is connected to the cantilever part by at least one set of opposite sides.

5. The sound-generating unit according to claim 1, characterized in that, The bottom of the bent portion is fixedly connected to the inner wall of the second through hole.

6. The sound-generating unit according to claim 1, characterized in that, The first through hole is located in the central region of the central magnet.

7. The sound-generating unit according to claim 1, characterized in that, The edge magnetic structure includes an edge magnet and an edge washer. The bottom surface of the edge magnet is connected to the yoke, and the top surface of the edge magnet is connected to the edge washer. The edge magnet is a continuous and complete frame structure. Alternatively, the edge magnet includes multiple sub-magnets, which are arranged in a frame structure, with adjacent sub-magnets in contact with each other.

8. The sound-generating unit according to claim 7, characterized in that, The yoke includes a body and a flange provided along the edge of the body. The second through hole, the central magnetic structure and the side magnetic structure are respectively provided on the body. The outer wall surface of the side magnetic structure is fixedly connected to the inner wall surface of the flange.

9. The sound-generating unit according to claim 8, characterized in that, The edge magnet is bonded to the flange; and / or The edge wash is welded or bonded to the flange.

10. The sound-generating unit according to claim 8, characterized in that, It also includes a diaphragm assembly that connects the voice coil and the flange.

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