sound production unit

Abstract

The utility model discloses a sound unit, including magnetic circuit subassembly and voice coil subassembly, the magnetic circuit subassembly includes upper magnetic cover, lower magnetic cover and respectively connect the center magnetic structure, intermediate magnetic structure and side magnetic structure of lower magnetic cover, the both sides of center magnetic structure are equipped with intermediate magnetic structure respectively, the outside of intermediate magnetic structure is equipped with side magnetic structure, the top of center magnetic structure, intermediate magnetic structure and side magnetic structure all with upper magnetic cover fixed connection, the first magnetic gap is formed between intermediate magnetic structure with side magnetic structure, the second magnetic gap is formed between center magnetic structure with intermediate magnetic structure, the voice coil subassembly includes first voice coil and the second voice coil in first voice coil, first voice coil is in first magnetic gap, the second magnetic gap is in second magnetic gap. This sound 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. However, at the same time, the performance requirements for sound units are getting higher and higher. How to improve the performance of sound units under the constraints of product structure and size has always been the research and development direction of practitioners. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a high-performance sound generating unit.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sound-generating unit, comprising:

[0005] A magnetic circuit assembly includes an upper magnetic cover, a lower magnetic cover, and a central magnetic structure, an intermediate magnetic structure, and a side magnetic structure respectively connected to the lower magnetic cover. The intermediate magnetic structure is provided on both sides of the central magnetic structure, and the side magnetic structure is provided on the outer side of the intermediate magnetic structure. The tops of the central magnetic structure, the intermediate magnetic structure, and the side magnetic structure are all fixedly connected to the upper magnetic cover. A first magnetic gap is formed between the intermediate magnetic structure and the side magnetic structure, and a second magnetic gap is formed between the central magnetic structure and the intermediate magnetic structure.

[0006] A voice coil assembly, comprising a first voice coil and a second voice coil located within the first voice coil, wherein the first voice coil is movable within a first magnetic gap, and the second magnetic gap is movable within a second magnetic gap.

[0007] In one embodiment, the two ends of the second voice coil are respectively connected to the inner wall surface of the first voice coil.

[0008] In one embodiment, the device further includes a frame, a skeleton, and a ring-shaped diaphragm assembly. The inner edge of the diaphragm assembly is connected to the magnetic circuit assembly, and the outer edge of the diaphragm assembly is connected to the frame. The frame is connected to the lower magnetic cover, and the skeleton connects the diaphragm assembly and the voice coil assembly.

[0009] In one embodiment, the diaphragm assembly includes an inner fixing part, an inner folded ring part, a connecting part, an outer folded ring part, and an outer fixing part connected sequentially from the inside to the outside. The inner fixing part is connected to the magnetic circuit assembly, the outer fixing part is connected to the frame, and the frame is connected to the connecting part.

[0010] In one embodiment, the inner fixing part is connected to the upper magnetic cover.

[0011] In one embodiment, a portion of the inner fixing portion is sandwiched between the upper magnetic cover and the side magnetic structure.

[0012] In one embodiment, the frame includes an inner mounting part, a raised part, and an outer mounting part connected in sequence, the outer mounting part being connected to the connecting part, and the inner mounting part being connected to the voice coil assembly.

[0013] In one embodiment, the inner mounting portion is connected to both the first voice coil and the second voice coil; or, the inner mounting portion is connected only to the first voice coil.

[0014] In one embodiment, a centering support is further included, the centering support connecting the frame and the voice coil assembly, the voice coil assembly being connected in series or in parallel through the centering support.

[0015] In one embodiment, the central magnetic structure includes a lower central magnet, a central washer, and an upper central magnet connected sequentially from bottom to top; the intermediate magnetic structure includes a lower intermediate magnet, a central washer, and an upper intermediate magnet connected sequentially from bottom to top; and the side magnetic structure includes a lower side magnet, a side washer, and an upper side magnet connected sequentially from bottom to top. The lower central magnet, lower intermediate magnet, and lower side magnet are respectively connected to the lower magnetic cover, and the upper central magnet, upper intermediate magnet, and upper side magnet are respectively connected to the upper magnetic cover.

[0016] 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 assembly move within the magnetic gap and do not exceed it. This improves the sensitivity of the sound-generating unit's BL value, symmetry, and flatness, thereby enhancing its acoustic performance. Furthermore, the staggered connection between the voice coil assembly and the diaphragm assembly prevents the diaphragm assembly from occupying the space above the voice coil assembly. This allows the voice coil to vibrate with a larger amplitude while maintaining a slim profile, thus increasing the loudness of the sound-generating unit. Additionally, the use of an inner and outer dual voice coil architecture effectively improves the magnetic utilization rate of the magnetic circuit assembly, further enhancing the BL value of the sound-generating unit and maximizing its performance. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is an exploded view of the sound-generating unit according to Embodiment 1 of this utility model;

[0019] Figure 2 A cross-sectional view of the sound-generating unit of Embodiment 1 of this utility model. Figure 1 ;

[0020] Figure 3 A cross-sectional view of the sound-generating unit of Embodiment 1 of this utility model. Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the voice coil assembly in the sound-generating unit according to Embodiment 1 of this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the sound-generating unit in Embodiment 1 of this utility model. Figure 1 ;

[0023] Figure 6 This is a schematic diagram of the internal structure of the sound-generating unit in Embodiment 1 of this utility model. Figure 2 .

[0024] Explanation of icon numbers:

[0025] 1. Pot stand;

[0026] 2. Magnetic circuit assembly; 21. Upper magnetic cover; 22. Lower magnetic cover; 23. Central magnetic structure; 24. Middle magnetic structure; 25. Side magnetic structure;

[0027] 3. Voice coil assembly; 31. First voice coil; 32. Second voice coil;

[0028] 4. Frame; 41. Internal mounting part; 42. Elevation part; 43. External mounting part;

[0029] 5. Diaphragm assembly; 51. Inner fixing part; 52. Inner folding ring part; 53. Connecting part; 54. Outer folding ring part; 55. Outer fixing part;

[0030] 6. Centering support. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, 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.

[0036] 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.

[0037] Example 1

[0038] Please refer to Figures 1 to 6 The first embodiment of this utility model is: a sound generating unit, including a frame 1, a magnetic circuit assembly 2, a voice coil assembly 3, a skeleton 4, and a ring-shaped diaphragm assembly 5;

[0039] The magnetic circuit assembly 2 includes an upper magnetic cover 21, a lower magnetic cover 22, and a central magnetic structure 23, an intermediate magnetic structure 24, and a side magnetic structure 25 respectively connected to the lower magnetic cover 22. The frame 1 is connected to the lower magnetic cover 22. The intermediate magnetic structure 24 is provided on both sides of the central magnetic structure 23, and the side magnetic structure 25 is provided on the outer side of the intermediate magnetic structure 24. The tops of the central magnetic structure 23, the intermediate magnetic structure 24, and the side magnetic structure 25 are all fixedly connected to the upper magnetic cover 21. A first magnetic gap is formed between the intermediate magnetic structure 24 and the side magnetic structure 25, and a second magnetic gap is formed between the central magnetic structure 23 and the intermediate magnetic structure 24.

[0040] The voice coil assembly 3 includes a first voice coil 31 and a second voice coil 32 located in the hollow region of the first voice coil 31. The first voice coil 31 is movable within the first magnetic gap, and the second magnetic gap is movable within the second magnetic gap. In some embodiments, there is a gap between the end of the first voice coil 31 and the second voice coil 32. To improve the structural stability of the overall structure of the sound-generating unit, it is preferable that both ends of the second voice coil 32 are respectively connected to the inner wall surface of the first voice coil 31, for example, by adhesive bonding.

[0041] The inner edge of the diaphragm assembly 5 is connected to the magnetic circuit assembly 2, and the outer edge of the diaphragm assembly 5 is connected to the frame 1. The frame 4 connects the diaphragm assembly 5 and the voice coil assembly 3. Specifically, the diaphragm assembly 5 includes an inner fixing part 51, an inner folding ring part 52, a connecting part 53, an outer folding ring part 54, and an outer fixing part 55 connected sequentially from the inside to the outside. The inner fixing part 51 is connected to the magnetic circuit assembly 2, the outer fixing part 55 is connected to the frame 1, and the frame 4 is connected to the connecting part 53.

[0042] In one or more embodiments, the inner fixing part 51 is connected to the upper magnetic cover 21. To improve the structural stability of the sound-generating unit, a portion of the inner fixing part 51 is sandwiched between the upper magnetic cover 21 and the side magnetic structure 25.

[0043] The frame 4 includes an inner mounting part 41, a raised part 42, and an outer mounting part 43 connected in sequence. The outer mounting part 43 is connected to the connecting part 53, and the inner mounting part 41 is connected to the voice coil assembly 3. In one or more embodiments, the inner mounting part 41 is connected to both the first voice coil 31 and the second voice coil 32; however, in this embodiment, the inner mounting part 41 is only connected to the first voice coil 31. Specifically, the frame 4 has four inner mounting parts 41, and the four inner mounting parts 41 are connected one-to-one to the four corners of the first voice coil 31.

[0044] The sound-generating unit also includes a centering bracket 6, which connects the frame 1 and the voice coil assembly 3. The voice coil assembly 3 is connected in series or in parallel through the centering bracket 6. In this embodiment, the inner mounting part 41 connects the voice coil assembly 3 at the connection between the first voice coil 31 and the second voice coil 32, thereby allowing the centering bracket 6 to be more easily electrically connected to the first voice coil 31 and the second voice coil 32.

[0045] The central magnetic structure 23 includes a lower central magnet, a central washer, and an upper central magnet connected sequentially from bottom to top. The intermediate magnetic structure 24 includes a lower intermediate magnet, a central washer, and an upper intermediate magnet connected sequentially from bottom to top. The side magnetic structure 25 includes a lower side magnet, a side washer, and an upper side magnet connected sequentially from bottom to top. The lower central magnet, lower intermediate magnet, and lower side magnet are respectively connected to the lower magnetic cover 22. The upper central magnet, upper intermediate magnet, and upper side magnet are respectively connected to the upper magnetic cover 21. The lower central magnet and the upper central magnet have opposite magnetic pole orientations. The lower intermediate magnet and the upper intermediate magnet have opposite magnetic pole orientations. The lower side magnet and the upper side magnet have opposite magnetic pole orientations. The upper central magnet and the upper intermediate magnet have opposite magnetic pole orientations. The upper intermediate magnet and the upper side magnet have opposite magnetic pole orientations.

[0046] 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 magnetic cover, a lower magnetic cover, and a central magnetic structure, an intermediate magnetic structure, and a side magnetic structure respectively connected to the lower magnetic cover. The intermediate magnetic structure is provided on both sides of the central magnetic structure, and the side magnetic structure is provided on the outer side of the intermediate magnetic structure. The tops of the central magnetic structure, the intermediate magnetic structure, and the side magnetic structure are all fixedly connected to the upper magnetic cover. A first magnetic gap is formed between the intermediate magnetic structure and the side magnetic structure, and a second magnetic gap is formed between the central magnetic structure and the intermediate magnetic structure. A voice coil assembly, comprising a first voice coil and a second voice coil located within the first voice coil, wherein the first voice coil is movable within a first magnetic gap, and the second magnetic gap is movable within a second magnetic gap.

2. The sound-generating unit according to claim 1, characterized in that: The two ends of the second voice coil are respectively connected to the inner wall surface of the first voice coil.

3. The sound-generating unit according to claim 1, characterized in that: It also includes a frame, a skeleton, and a ring-shaped diaphragm assembly. The inner edge of the diaphragm assembly is connected to the magnetic circuit assembly, and the outer edge of the diaphragm assembly is connected to the frame. The frame is connected to the lower magnetic cover, and the skeleton connects the diaphragm assembly and the voice coil assembly.

4. The sound-generating unit according to claim 3, characterized in that: The diaphragm assembly includes an inner fixing part, an inner folding ring part, a connecting part, an outer folding ring part, and an outer fixing part connected sequentially from the inside to the outside. The inner fixing part is connected to the magnetic circuit assembly, the outer fixing part is connected to the frame, and the frame is connected to the connecting part.

5. The sound-generating unit according to claim 4, characterized in that: The inner fixing part is connected to the upper magnetic cover.

6. The sound-generating unit according to claim 5, characterized in that: A portion of the inner fixing part is sandwiched between the upper magnetic cover and the side magnetic structure.

7. The sound-generating unit according to claim 4, characterized in that: The frame includes an inner mounting part, a raised part, and an outer mounting part connected in sequence. The outer mounting part is connected to the connecting part, and the inner mounting part is connected to the voice coil assembly.

8. The sound-generating unit according to claim 7, characterized in that: The inner mounting portion is connected to both the first voice coil and the second voice coil; or, the inner mounting portion is connected only to the first voice coil.

9. The sound-generating unit according to claim 3, characterized in that: It also includes a centering support, which connects the frame and the voice coil assembly, and the voice coil assembly is connected in series or in parallel through the centering support.

10. The sound-generating unit according to claim 1, characterized in that: The central magnetic structure includes a lower central magnet, a central washer, and an upper central magnet connected sequentially from bottom to top. The intermediate magnetic structure includes a lower intermediate magnet, a central washer, and an upper intermediate magnet connected sequentially from bottom to top. The side magnetic structure includes a lower side magnet, a side washer, and an upper side magnet connected sequentially from bottom to top. The lower central magnet, lower intermediate magnet, and lower side magnet are respectively connected to the lower magnetic cover. The upper central magnet, upper intermediate magnet, and upper side magnet are respectively connected to the upper magnetic cover.

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