Sound production unit

Abstract

The utility model discloses a sound production unit, which comprises a yoke, a voice coil, a first side magnetic structure, a centering disk and two groups of central magnetic structures, a fixed table is convexly arranged on the yoke, a conductive piece is arranged in the fixed table in a penetrating manner, and the conductive piece is provided with a conduction part exposed out of the sound production unit; the center magnetic structures are arranged on the yoke, the two center magnetic structures are oppositely arranged, a gap is formed between the two center magnetic structures, and the fixing table is located in the gap; the two opposite sides of the voice coil are provided with inner concave parts, the inner concave parts are located in the gap, and the fixing table is located between the two inner concave parts. The first edge magnetic structure is arranged on the yoke, and the first edge magnetic structure is provided with an extension part extending into the concave area of the inner concave part; the centering disk comprises an inner fixing part, a cantilever part, a lifting part and an outer fixing part which are connected in sequence, the inner fixing part is fixed on the fixing table and electrically conducted with the conductive piece, and the outer fixing part is fixed on the vibrating diaphragm assembly and electrically conducted with the voice coil. The sound production unit is good in acoustic 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] With the development of science and technology, portable electronic products such as mobile phones, handheld game consoles, navigation devices, and handheld multimedia entertainment devices play an indispensable role in people's daily lives. Among these portable electronic products, the sound unit is an essential component, and the quality of the sound unit directly affects the user experience when using these portable electronic products.

[0003] In related technologies, the space available for setting up sound-generating units inside portable electronic products is getting smaller and smaller, which limits the size of the magnetic circuit system in the sound-generating unit and makes it difficult to increase the BL value of the sound-generating unit, resulting in unsatisfactory acoustic performance of the sound-generating unit. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a sound-generating unit with good acoustic performance.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sound-generating unit, comprising:

[0006] A yoke, on which a fixed platform is protruding, and a conductive element is inserted inside the fixed platform, the conductive element having a conductive portion exposed to the sound-generating unit;

[0007] Two sets of central magnetic structures are provided on the yoke, the two sets of central magnetic structures are arranged opposite to each other, and there is a gap between the two sets of central magnetic structures. The fixed platform is located in the gap.

[0008] The voice coil has concave portions on opposite sides, the concave portions being located within the gap, and the fixed platform being located between the two concave portions;

[0009] A first side magnetic structure is disposed on the yoke, and the first side magnetic structure has an extension extending into the recessed area of ​​the inner concave portion;

[0010] Diaphragm assembly;

[0011] The centering support includes an inner fixing part, a cantilever part, a lifting part and an outer fixing part connected in sequence. The inner fixing part is fixed to the fixing platform and electrically connected to the conductive element. The outer fixing part is fixed to the diaphragm assembly and electrically connected to the voice coil.

[0012] In one embodiment, the cantilever portion is connected to both sides of the internal fixing portion.

[0013] In one embodiment, the centering support is a centrally symmetrical structure.

[0014] In one embodiment, the yoke has a window, and the fixing platform is embedded in the window.

[0015] In one embodiment, the voice coil has a planar symmetrical structure.

[0016] In one embodiment, the inner fixing part of the centering support is provided with an inner solder pad, which is electrically connected to the conductive element, and the outer fixing part is provided with an outer solder pad that is electrically connected to the inner solder pad, which is electrically connected to the voice coil.

[0017] In one embodiment, the system further includes an FPC board, wherein the centering support and the conductive element are respectively partial areas of the FPC board, and the fixing platform is provided with through holes for partial areas of the FPC board to pass through.

[0018] In one embodiment, the recess is located on the long side or the short side of the voice coil.

[0019] In one embodiment, a second side magnetic structure is further included, which is located outside the side of the voice coil where the concave portion is not provided.

[0020] In one embodiment, a flange is also included, which is located outside the side of the voice coil where the recess is not provided, and the flange is formed by bending a portion of the yoke.

[0021] The beneficial effects of this invention are as follows: This sound-generating unit can effectively increase the effective length of the voice coil in the magnetic circuit system without increasing the overall volume, thereby increasing the BL value of the sound-generating unit and improving its sensitivity, thus enhancing the performance of the miniature loudspeaker; by placing the centering support plate in the center, the four corners of the sound-generating unit no longer need to be equipped with centering supports, thereby allowing the overall volume of the side magnetic structure to be set larger, further increasing the BL value of the sound-generating unit and improving its performance. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is an exploded view of the sound-generating unit in Embodiment 1;

[0024] Figure 2 A cross-sectional view of the sound-generating unit in Embodiment 1 Figure 1 ;

[0025] Figure 3 A cross-sectional view of the sound-generating unit in Embodiment 1 Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the structure of the sound-generating unit after the diaphragm assembly is hidden in Embodiment 1;

[0027] Figure 5 This is a schematic diagram of a portion of the structure of the sound-generating unit in Embodiment 1;

[0028] Figure 6 This is a schematic diagram of the centering support plate in the sound-generating unit of Embodiment 1.

[0029] Explanation of icon numbers:

[0030] 1. Pot stand;

[0031] 2. Diaphragm assembly;

[0032] 3. Voice coil; 31. Concave portion;

[0033] 4. Magnetic circuit assembly; 41. Yoke; 42. Central magnetic structure; 43. First side magnetic structure; 431. Extension; 44. Second side magnetic structure;

[0034] 5. Centering support; 51. Internal fixation; 52. Cantilever; 53. Lifting section; 54. External fixation;

[0035] 6. Fixed platform;

[0036] 7. Conductive components. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Example 1

[0044] Please refer to Figures 1 to 6The first embodiment of this utility model is as follows: a sound-generating unit, including a frame 1 and a vibration assembly and a magnetic circuit assembly 4 respectively connected to the frame 1, with a centering support plate 5. The vibration assembly includes a voice coil 3 and a diaphragm assembly 2 respectively connected to the voice coil 3 and the frame 1. The magnetic circuit assembly 4 includes a yoke 41 and a central magnetic structure 42 and a first side magnetic structure 43 respectively disposed on the yoke 41. A fixing platform 6 protrudes from the yoke 41, and a conductive element 7 passes through the fixing platform 6. The conductive element 7 has a conductive portion exposed to the sound-generating unit, which is used to conduct external power. The central magnetic structure 42 consists of two sets, which are arranged opposite to each other. The fixed platform 6 is located within the gap; the voice coil 3 has concave portions 31 on opposite sides, the concave portions 31 are located within the gap, and the fixed platform 6 is located between the two concave portions 31; the first side magnetic structure 43 is disposed on the yoke 41, and the first side magnetic structure 43 has an extension portion 431 extending into the recessed area of ​​the concave portion 31; the centering support 5 includes an inner fixing portion 51, a cantilever portion 52, a lifting portion 53 and an outer fixing portion 54 connected in sequence, the inner fixing portion 51 is fixed on the fixed platform 6 and electrically connected to the conductive element 7, and the outer fixing portion 54 is fixed on the diaphragm assembly 2 and electrically connected to the voice coil 3.

[0045] To ensure a more balanced force on the vibration assembly, the cantilever portion 52 is connected to both sides of the inner fixing portion 51, and preferably the centering support 5 has a centrally symmetrical structure.

[0046] The voice coil 3 has a planar symmetrical structure, that is, the concave portions 31 on opposite sides of the voice coil 3 are arranged opposite each other.

[0047] The central magnetic structure 42 includes a central washer and a central magnet, the central magnet being located between the central washer and the yoke 41 and connecting the central washer and the yoke 41; the first side magnetic structure 43 includes a first side washer and a first side magnet, the first side magnet being located between the first side washer and the yoke 41 and connecting the first side washer and the yoke 41.

[0048] In some embodiments, the recess 31 is located on the long side of the voice coil 3; while in this embodiment, the recess 31 is located on the short side of the voice coil 3, specifically, the recess 31 is located in the middle region of the short side of the voice coil 3.

[0049] In detail, the yoke 41 has a window, and the fixing platform 6 is embedded in the window. In one or more embodiments, the fixing platform 6 is made of insulating material, the conductive element 7 is a metal structural component, the inner fixing part 51 of the centering support 5 has an inner solder pad, the inner solder pad is electrically connected to the conductive element 7, and the outer fixing part 54 has an outer solder pad, which is electrically connected to the inner solder pad and the voice coil 3. In other embodiments, the sound-generating unit also includes an FPC board, the centering support 5 and the conductive element 7 are respectively part areas of the FPC board. In this case, the centering support 5 and the conductive element 7 are integrally formed structures. The fixing platform 6 has a through hole for part areas of the FPC board to pass through. That is to say, in this case, the FPC board directly leads out the sound-generating unit to be electrically connected to an external power source.

[0050] In this embodiment, the sound-generating unit further includes a second side magnetic structure 44, which is located on the outer side of the voice coil 3 where the concave portion 31 is not provided. The second side magnetic structure 44 includes a second side washer and a second side magnet, with the second side magnet located between the second side washer and the yoke 41 and connecting the second side washer and the yoke 41. In other embodiments, the sound-generating unit further includes a flange, which is located on the outer side of the voice coil 3 where the concave portion 31 is not provided. The flange is formed by bending a portion of the yoke 41. That is, in other embodiments, the flange can be used to replace the second side magnetic structure 44. Optionally, the flange is perpendicular to the yoke 41.

[0051] 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 inventive concept of this utility model and the contents of this utility model specification and drawings, 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 yoke, on which a fixed platform is protruding, and a conductive element is inserted inside the fixed platform, the conductive element having a conductive portion exposed to the sound-generating unit; Two sets of central magnetic structures are provided on the yoke, the two sets of central magnetic structures are arranged opposite to each other, and there is a gap between the two sets of central magnetic structures. The fixed platform is located in the gap. The voice coil has concave portions on opposite sides, the concave portions being located within the gap, and the fixed platform being located between the two concave portions; A first side magnetic structure is disposed on the yoke, and the first side magnetic structure has an extension extending into the recessed area of ​​the inner concave portion; Diaphragm assembly; The centering support includes an inner fixing part, a cantilever part, a lifting part and an outer fixing part connected in sequence. The inner fixing part is fixed to the fixing platform and electrically connected to the conductive element. The outer fixing part is fixed to the diaphragm assembly and electrically connected to the voice coil.

2. The sound-generating unit according to claim 1, characterized in that: The cantilever portion is connected to both sides of the internal fixation portion.

3. The sound-generating unit according to claim 2, characterized in that: The centering support has a centrally symmetrical structure.

4. The sound-generating unit according to claim 1, characterized in that: The yoke is provided with a window, and the fixing platform is embedded in the window.

5. The sound-generating unit according to claim 1, characterized in that: The voice coil has a planar symmetrical structure.

6. The sound-generating unit according to claim 1, characterized in that: The inner fixing part of the centering support is provided with an inner solder pad, which is electrically connected to the conductive component. The outer fixing part is provided with an outer solder pad that is electrically connected to the inner solder pad and is electrically connected to the voice coil.

7. The sound-generating unit according to claim 1, characterized in that: It also includes an FPC board, wherein the centering support and the conductive component are respectively part of the FPC board, and the fixing platform is provided with through holes for part of the FPC board to pass through.

8. The sound-generating unit according to claim 1, characterized in that: The recessed portion is located on the long or short side of the voice coil.

9. The sound-generating unit according to claim 1, characterized in that: It also includes a second side magnetic structure, which is located on the outside of the side of the voice coil where the concave portion is not provided.

10. The sound-generating unit according to claim 1, characterized in that: It also includes a flange, which is located on the outside of the side of the voice coil where the concave portion is not provided, and the flange is formed by bending a portion of the yoke.

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