Sound production unit

Abstract

The utility model discloses a sound production unit, which comprises a voice coil, a central magnetic structure and an edge magnetic structure, and two opposite sides of the voice coil are provided with inner concave parts; the whole center magnetic structure is H-shaped, the center magnetic structure comprises two groups of convex magnetic structures, and the two groups of convex magnetic structures are close to each other to form avoiding parts corresponding to the inner concave parts; and the edge magnetic structure corresponding to the inner concave part 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; moreover, the H-shaped central magnetic structure is formed by combining the two convex magnetic structures, so that the situations of deformation, breakage and the like of the H-shaped middle position due to insufficient strength are avoided, the waste of production raw materials of the sound production unit is reduced, and the service life of the sound production unit is ensured.

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 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 voice coil, wherein the opposite sides of the voice coil have concave portions;

[0007] The central magnetic structure is H-shaped and includes two sets of convex magnetic structures. The two sets of convex magnetic structures are close to each other to form a relief portion corresponding to the concave portion.

[0008] The edge magnetic structure, corresponding to the concave portion, has an extension extending into the recessed region of the concave portion.

[0009] In one embodiment, the two sets of convex magnetic structures are arranged symmetrically.

[0010] In one embodiment, the recesses on opposite sides of the voice coil are symmetrically arranged.

[0011] In one embodiment, the recess is located on the long side or the short side of the voice coil.

[0012] In one embodiment, a yoke is also included, wherein the central magnetic structure and the edge magnetic structure are respectively connected to the yoke.

[0013] In one embodiment, the convex magnetic structure includes a connected convex central magnet and a convex central washer, the convex central washer being located above the convex central magnet.

[0014] In one embodiment, the edge magnetic structure corresponding to the concave portion includes a connected convex edge magnet and a convex edge washer, the convex edge washer being located above the convex edge magnet.

[0015] In one embodiment, a basin stand is also included, with the side magnetic structure connected to the basin stand.

[0016] In one embodiment, a support member is also included, the support member connecting the voice coil and the frame.

[0017] In one embodiment, the system further includes a vibration assembly comprising a diaphragm assembly and a voice coil, the diaphragm assembly connecting the voice coil and the frame.

[0018] 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; moreover, the H-shaped central magnetic structure is composed of two convex magnetic structures, avoiding deformation and breakage due to insufficient strength in the middle of the H-shape, which helps reduce the waste of raw materials in the production of the sound-generating unit and ensures the service life of the sound-generating unit. Attached Figure Description

[0019] 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.

[0020] Figure 1 is a schematic diagram of the internal structure of the sound-generating unit in Embodiment 1 of this utility model;

[0021] Figure 2 is an exploded view of the sound-generating unit of Embodiment 1 of this utility model.

[0022] Explanation of icon numbers:

[0023] 1. Pot stand;

[0024] 2. Diaphragm assembly;

[0025] 3. Voice coil; 31. Concave portion;

[0026] 4. Yoke;

[0027] 5. Central magnetic structure; 51. Convex magnetic structure; 511. Convex central magnet; 512. Convex central washer; 52. Clearance section;

[0028] 6. Edge magnetic structure; 61. Extension; 62. Convex edge magnet; 63. Convex edge washer;

[0029] 7. Support components. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Example 1

[0037] Referring to Figures 1 and 2, Embodiment 1 of this utility model is as follows: A sound-generating unit includes a frame 1, a vibration assembly, and a magnetic circuit assembly. The vibration assembly includes a diaphragm assembly 2 and a voice coil 3. The diaphragm assembly 2 connects the voice coil 3 to the frame 1. The voice coil 3 has concave portions 31 on opposite sides. The magnetic circuit assembly includes a yoke 4 and a central magnetic structure 5 and a side magnetic structure 6 respectively connected to the yoke 4. The side magnetic structure 6 connects to the frame 1. A magnetic gap is formed between the central magnetic structure 5 and the side magnetic structure 6. A portion of the voice coil 3 is located in… Within the magnetic gap; the central magnetic structure 5 is H-shaped in general, and includes two sets of convex magnetic structures 51. The two sets of convex magnetic structures 51 are close to each other to form a relief portion 52 corresponding to the concave portion 31. Preferably, the two sets of convex magnetic structures 51 abut against each other. It is easy to understand that the relief portion 52 is the H-shaped notch. The side magnetic structure 6 corresponding to the concave portion 31 has an extension portion 61 that extends into the recessed area of ​​the concave portion 31. That is to say, the side magnetic structure 6 corresponding to the concave portion 31 is convex in general.

[0038] To ensure the acoustic performance of the sound-generating unit, it is preferable that two sets of convex magnetic structures 51 are symmetrically arranged. Specifically, each convex magnetic structure 51 includes a connected convex central magnet 511 and a convex central washer 512, with the central washer 512 located above the central magnet 511. The central magnet 511 is connected to the yoke 4. The side magnetic structure 6 corresponding to the concave portion 31 includes a connected convex side magnet 62 and a convex side washer 63, with the side washer 63 located above the side magnet 62. Moreover, compared to using two convex magnetic structures 51 of different sizes in the central magnetic structure 5, the use of two sets of convex magnetic structures 51 of the same size in this embodiment also has the advantage of convenient manufacturing.

[0039] The concave portions 31 on opposite sides of the voice coil 3 are symmetrically arranged, which allows the driving force borne by the voice coil 3 to be more balanced, thus ensuring the acoustic performance of the sound-generating unit to a greater extent.

[0040] In this embodiment, the concave portion 31 is located on the short side of the voice coil 3, and a side magnetic structure 6 is also provided on the outer side of the long side of the voice coil 3. Since the long side of the voice coil 3 does not have the concave portion 31, the side magnetic structure 6 located on the outer side of the long side of the voice coil 3 is elongated. In other embodiments, it is also feasible to replace the side magnetic structure 6 located on the outer side of the long side of the voice coil 3 with a flange formed by bending a portion of the yoke 4.

[0041] In other embodiments, it is also acceptable for the recess 31 to be located on the long side of the voice coil 3.

[0042] In one or more embodiments, the sound-generating unit further includes a support member 7, which connects the voice coil 3 to the frame 1. The support member 7 is used to correct the deviation of the voice coil 3, thereby improving the acoustic performance of the sound-generating unit. The support member 7 includes a diaphragm and / or the voice coil 3.

[0043] 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: It includes a voice coil with concave portions on opposite sides; a central magnetic structure, which is H-shaped and includes two sets of convex magnetic structures that are close to each other to form a clearance portion corresponding to the concave portion; and a side magnetic structure, which has 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 two sets of convex magnetic structures are symmetrically arranged.

3. The sound-generating unit according to claim 1, characterized in that: The concave portions on opposite sides of the voice coil are symmetrically arranged.

4. 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.

5. The sound-generating unit according to claim 1, characterized in that: It also includes a yoke, wherein the central magnetic structure and the side magnetic structure are respectively connected to the yoke.

6. The sound-generating unit according to claim 1, characterized in that: The convex magnetic structure includes a connected convex central magnet and a convex central washer, with the convex central washer located above the convex central magnet.

7. The sound-generating unit according to claim 1, characterized in that: The edge magnetic structure corresponding to the concave portion includes a connected convex edge magnet and a convex edge washer, with the convex edge washer located above the convex edge magnet.

8. The sound-generating unit according to claim 1, characterized in that: It also includes a basin stand, and the side magnetic structure is connected to the basin stand.

9. The sound-generating unit according to claim 8, characterized in that: It also includes a support component that connects the voice coil to the frame.

10. The sound-generating unit according to claim 8, characterized in that: It also includes a vibration assembly, which includes a diaphragm assembly and a voice coil, the diaphragm assembly connecting the voice coil and the frame.

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