Sound production unit

Abstract

The utility model discloses a sound production unit, which comprises a yoke, a voice coil, a first side magnetic structure and two groups of central magnetic structures, and a magnetic conductive structure is convexly arranged on the yoke; 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 magnetic conduction structure is located in the gap; the two opposite sides of the voice coil are provided with inward concave parts, the inward concave parts are located in the gap, and the magnetic conductive structure is located between the two inward 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. According to the sound production unit, the effective length of the voice coil in a magnetic circuit system can be effectively increased without increasing the overall size, so that the BL value of the sound production unit is increased, the sensitivity of the sound production unit is improved, and the effect of improving the performance of a miniature loudspeaker is achieved; the magnetic conductive structure on the yoke can enable the magnetic circuit assembly to form a complete magnetic loop corresponding to the area near the inner concave part.

Description

Sound unit 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. Summary of the Invention

[0004] The technical problem solved by this utility model is to provide a small-volume 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, wherein a magnetically conductive structure is protruding on the yoke;

[0007] Two sets of central magnetic structures are disposed on the yoke iron, 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 magnetic conductive structure 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 magnetically conductive structure 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 region of the inner concave portion.

[0010] In one embodiment, the magnetically conductive structure is a solid boss.

[0011] In one embodiment, the magnetic conductive structure is a hollow convex bulge formed by stamping.

[0012] In one embodiment, the yoke has a window, and the magnetic conductive structure is a folded edge connecting the edge of the window.

[0013] In one embodiment, the magnetic conductive structure and the yoke are integrally formed.

[0014] In one embodiment, the magnetically conductive structure is welded to the yoke.

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

[0016] In one embodiment, the recess is located on the long side or the short side of the voice coil.

[0017] 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.

[0018] 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.

[0019] The beneficial effects of this utility model 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, improving the sensitivity of the sound-generating unit, and achieving the effect of improving the performance of the miniature loudspeaker; the magnetic conductive structure on the yoke can allow the magnetic circuit components to form a complete magnetic circuit corresponding to the area near the concave part. Attached Figure Description

[0020] 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.

[0021] Figure 1 is a cross-sectional view of the sound-generating unit of Embodiment 1;

[0022] Figure 2 is a schematic diagram of the structure of the sound-generating unit after the diaphragm assembly is hidden in Embodiment 1;

[0023] Figure 3 is an exploded view of the sound-generating unit of Embodiment 1;

[0024] Figure 4 is a cross-sectional view of the sound-generating unit in Embodiment 2;

[0025] Figure 5 is a cross-sectional view of the sound-generating unit of Embodiment 3.

[0026] Explanation of icon numbers:

[0027] 1. Pot stand;

[0028] 2. Diaphragm assembly;

[0029] 3. Voice coil; 31. Concave portion;

[0030] 4. Yoke; 41. Magnetic structure;

[0031] 5. Central magnetic structure;

[0032] 6. First side magnetic structure; 61. Extension;

[0033] 7. Second side magnetic structure;

[0034] 8. Stabilizing support. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Example 1

[0042] Referring to Figures 1 to 3, Embodiment 1 of this utility model is as follows: a sound-generating unit, including a frame 1, a vibration assembly, and a magnetic circuit assembly. The vibration assembly and the magnetic circuit assembly are fixedly connected to the frame 1. The vibration assembly includes a voice coil 3 and a diaphragm assembly 2 connecting the voice coil 3 and the frame 1. The magnetic circuit assembly includes a yoke 4, a first side magnetic structure 6 disposed on the yoke 4, and two sets of central magnetic structures 5 disposed on the yoke 4. A magnetically conductive structure 41 protrudes from the yoke 4. The two sets of central magnetic structures 5 are arranged opposite to each other, with a gap between them. The magnetically conductive structure 41 is located within the gap. The voice coil 3 has concave portions 31 on opposite sides, which are located within the gap. The magnetically conductive structure 41 is located between the two concave portions 31. The first side magnetic structure 6 has an extension 61 extending into the recessed area of ​​the concave portion 31.

[0043] 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.

[0044] The central magnetic structure 5 includes a central washer and a central magnet, the central magnet being located between the central washer and the yoke 4 and connecting the central washer and the yoke 4; the first side magnetic structure 6 includes a first side washer and a first side magnet, the first side magnet being located between the first side washer and the yoke 4 and connecting the first side washer and the yoke 4.

[0045] In this embodiment, the magnetically conductive structure 41 is a solid boss; the magnetically conductive structure 41 and the yoke 4 are integrally formed. In other embodiments, the magnetically conductive structure 41 and the yoke 4 can also be welded together.

[0046] 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.

[0047] In this embodiment, the sound-generating unit further includes a second side magnetic structure 7, 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 7 includes a second side washer and a second side magnet, with the second side magnet located between the second side washer and the yoke 4 and connecting the second side washer and the yoke 4. 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 4. That is, in other embodiments, the flange can be used to replace the second side magnetic structure 7. Optionally, the flange is perpendicular to the yoke 4.

[0048] In order to correct the deviation of the voice coil 3 and conduct the voice coil 3, in this embodiment, the sound generating unit further includes a centering support plate 8. The centering support plate 8 connects the voice coil 3 and the frame 1. The four corners of the frame 1 are respectively connected to the centering support plate 8. At least part of the centering support plate 8 is electrically connected to the voice coil 3.

[0049] Example 2

[0050] Please refer to Figure 4. Embodiment 2 of this utility model is a parallel technical solution to Embodiment 1. The difference between Embodiment 1 and Embodiment 2 is that the magnetic conductive structure 41 is a hollow convex hull formed by stamping, which makes it easier to process and manufacture the yoke 4 by using the hollow convex hull as the magnetic conductive structure 41.

[0051] Example 3

[0052] Please refer to Figure 5. Embodiment 3 of this utility model is a parallel technical solution to Embodiment 1. The difference between Embodiment 3 and Embodiment 1 is that the yoke 4 has a window, and the magnetic conductive structure 41 is a folded edge connecting the edge of the window. During the production process, the folded edge can be formed by stamping, stamping and stretching, or formed by other processes. Optionally, the folded edge is perpendicular to the yoke 4.

[0053] 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: The device includes a yoke with a protruding magnetically conductive structure; two sets of central magnetic structures disposed on the yoke, the two sets of central magnetic structures being arranged opposite each other with a gap between them, and the magnetically conductive structure located within the gap; a voice coil with concave portions on opposite sides, the concave portions being located within the gap, and the magnetically conductive structure located between the two concave portions; and a first side magnetic structure disposed on the yoke, the first side magnetic structure having an extension portion extending into the recessed area of ​​the concave portion.

2. The sound-generating unit according to claim 1, characterized in that: The magnetically conductive structure is a solid boss.

3. The sound-generating unit according to claim 1, characterized in that: The magnetically conductive structure is a hollow convex hull formed by stamping.

4. The sound-generating unit according to claim 1, characterized in that: The yoke is provided with a window, and the magnetic conductive structure is a folded edge connecting the edge of the window.

5. The sound-generating unit according to claim 1, characterized in that: The magnetic conductive structure and the yoke are integrally formed.

6. The sound-generating unit according to claim 1, characterized in that: The magnetically conductive structure is welded to the yoke.

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

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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