Sound production unit

Abstract

The utility model discloses a sound production unit, which comprises a diaphragm assembly, a voice coil, a spacer, a support structure, two basins and two magnetic circuit assemblies, and at least one of the basins is provided with a sound outlet; the magnetic circuit assemblies are connected with the basin frames in a one-to-one correspondence manner, each magnetic circuit assembly is provided with a magnetic gap, each magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, and the magnetic gaps are arranged around the central magnetic structures; the two sides of the diaphragm assembly are respectively connected with a frame, and the center of the diaphragm assembly is provided with a hollow window. The voice coil is located at the hollow window and is connected with the diaphragm assembly, and the top end and the bottom end of the voice coil respectively extend into the two magnetic gaps; the spacer is arranged in the hollow area of the voice coil, the edge of the spacer is connected with the inner peripheral wall of the voice coil, the center of the spacer is provided with a window, and the window is provided with an auxiliary diaphragm; the supporting structure is connected with the auxiliary vibrating diaphragm and the two central magnetic structures so as to support the two central magnetic structures. The sounding unit is excellent in performance and stable in structure.

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, are widely used in people's daily lives. Among these mobile electronic devices, the sound unit is an essential component, and the quality of the sound emitted by the sound unit directly affects the user experience when using these mobile electronic devices.

[0003] Existing sound units typically employ a single-sided magnetic circuit assembly scheme, where the voice coil and magnetic circuit are located on one side of the diaphragm assembly. However, during operation, when the voice coil vibrates upwards, it moves away from the magnetic gap, resulting in poor symmetry and flatness of the BL (Body Blur), which also limits the reduction of distortion and the improvement of performance.

[0004] If a dual magnetic circuit design is adopted, the central magnetic structures in the two magnetic circuit components are suspended in the air when they are close to each other. In reliability drop tests, the central magnetic structures are prone to falling off. In other words, the dual magnetic circuit design has the problem of unstable sound unit structure.

[0005] The above background information is provided only to aid in understanding the inventive concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0006] The technical problem solved by this utility model is to provide a high-performance sound unit with a central magnetic structure that is not easily detached.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sound-generating unit, comprising:

[0008] Two basin stands, at least one of which is provided with a sound outlet;

[0009] Two magnetic circuit assemblies are connected to the basin frame in a one-to-one correspondence. Each magnetic circuit assembly has a magnetic gap and includes a yoke and a central magnetic structure disposed on the yoke. The magnetic gap is arranged around the central magnetic structure.

[0010] A diaphragm assembly, wherein the diaphragm assembly is connected to the frame on both sides, and the diaphragm assembly has a hollow window in the center;

[0011] A voice coil, located at the cutout window and connected to the diaphragm assembly, with its top and bottom ends extending into the two magnetic gaps respectively;

[0012] A spacer is provided in the hollow area of ​​the voice coil, the edge of the spacer is connected to the inner peripheral wall of the voice coil, and a window is provided in the center of the spacer, at which a secondary diaphragm is provided;

[0013] A support structure is provided, which connects the sub-diaphragm to the two central magnetic structures to support the two central magnetic structures.

[0014] In one embodiment, the sub-diaphragm includes an inner mounting portion, a deformation portion, and an outer mounting portion connected sequentially from the inside to the outside. The inner mounting portion is fixedly connected to the support structure, and the outer mounting portion is connected to the spacer.

[0015] In one embodiment, the inner mounting portion has a perforation through which the support structure passes.

[0016] In one embodiment, the support structure has a stepped portion, and the inner mounting portion is fixed to the stepped surface of the stepped portion.

[0017] In one embodiment, the central magnetic structure includes a central magnet and a central washer, the central magnet connecting the central washer and the yoke, the central washer located above the partition being the upper washer, the central washer located below the partition being the lower washer, and the support structure connecting the upper washer and the lower washer.

[0018] In one embodiment, the support structure includes an upper support body and a lower support body, the upper support body being connected to the upper washer, the lower support body being connected to the lower washer, and the upper support body and the lower support body being directly connected; or, the upper support body and the lower support body are respectively connected to the inner mounting part, and the upper support body and the lower support body are indirectly connected.

[0019] In one embodiment, the upper support and the upper washer are integrally formed as a single structure; and / or, the lower support and the lower washer are integrally formed as a single structure.

[0020] In one embodiment, the upper support is a solid structure or a hollow convex hull structure; the lower support is a solid structure or a hollow convex hull structure.

[0021] In one embodiment, the connection between the diaphragm assembly and the voice coil is located in the middle of the voice coil.

[0022] In one embodiment, the two magnetic circuit components are mirror-symmetric.

[0023] The beneficial effects of this utility model are as follows: The sound unit has a novel structure and adopts a dual magnetic circuit design, which can make full use of the front and rear cavity space of the sound unit, increase the total volume of the magnet, improve the symmetry and flatness of the BL, reduce distortion, and thus improve the performance of the sound unit; the support structure can effectively support the central magnetic structure in the two magnetic circuit components, thereby preventing the central magnetic structure from falling off and improving the structural stability of the sound unit; the setting of the secondary diaphragm allows the support structure to not affect the vibration of the spacer with the voice coil. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a cross-sectional view of the sound-generating unit according to Embodiment 1 of this utility model;

[0026] Figure 2 This is a cross-sectional view of the sound-generating unit according to Embodiment 2 of this utility model;

[0027] Figure 3 This is a cross-sectional view of the sound-generating unit according to Embodiment 3 of this utility model;

[0028] Figure 4 This is a cross-sectional view of the sound-generating unit according to Embodiment 4 of this utility model;

[0029] Figure 5 This is a cross-sectional view of the sound-generating unit of Embodiment 5 of this utility model.

[0030] Explanation of icon numbers:

[0031] 1. Diaphragm assembly;

[0032] 2. Voice coil;

[0033] 3. Spacing sheet;

[0034] 4. Sink stand; 41. Sound outlet;

[0035] 5. Magnetic circuit assembly; 51. Yoke; 52. Central magnetic structure; 53. Side magnetic structure; 55. Upper washer; 56. Lower washer;

[0036] 6. Supporting structure; 61. Upper support; 62. Lower support;

[0037] 7. Secondary diaphragm; 71. Internal mounting part; 72. Deformation part; 73. External mounting part. Detailed Implementation

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] Example 1

[0045] Please refer to Figure 1The first embodiment of this utility model is as follows: a sound-generating unit, including a diaphragm assembly 1, a voice coil 2, a spacer 3, a support structure 6, two frames 4, and two magnetic circuit assemblies 5, at least one of the frames 4 having a sound outlet 41; the magnetic circuit assemblies 5 are connected one-to-one with the frames 4, the magnetic circuit assemblies 5 have magnetic gaps, the magnetic circuit assemblies 5 include a yoke 51 and a central magnetic structure 52 and a side magnetic structure 53 respectively disposed on the yoke 51, the magnetic gap being formed between the central magnetic structure 52 and the side magnetic structure 53, that is, the magnetic gap surrounds the central magnetic structure 52. The diaphragm assembly 1 is configured such that the frame 4 is connected to both sides of the diaphragm assembly 1, and a hollow window is provided in the center of the diaphragm assembly 1; the voice coil 2 is located at the hollow window and connected to the diaphragm assembly 1, and the top and bottom ends of the voice coil 2 extend into the two magnetic gaps respectively; the spacer 3 is located in the hollow area of ​​the voice coil 2, the edge of the spacer 3 is connected to the inner peripheral wall of the voice coil 2, and a window is provided in the center of the spacer 3, at which a secondary diaphragm 7 is provided; the support structure 6 connects the secondary diaphragm 7 to the two central magnetic structures 52 respectively to support the two central magnetic structures 52.

[0046] The sub-diaphragm 7 includes an inner mounting part 71, a deformation part 72, and an outer mounting part 73 connected sequentially from the inside to the outside. The inner mounting part 71 is fixedly connected to the support structure 6, and the outer mounting part 73 is connected to the partition plate 3.

[0047] The connection between the diaphragm assembly 1 and the voice coil 2 is located in the middle of the voice coil 2. That is, the upper and lower regions of the voice coil 2 are symmetrical about the horizontal cross-section of the middle of the sound-generating unit. This can reduce distortion, improve the symmetry and flatness of the BL, and further enhance the performance of the sound-generating unit.

[0048] In one or more embodiments, the two magnetic circuit components 5 are arranged in a mirror-symmetric manner, which can further reduce distortion, improve BL symmetry and flatness, and thus further enhance the performance of the sound-generating unit.

[0049] The central magnetic structure 52 includes a central magnet and a central washer. The central magnet connects the central washer and the yoke 51. The central washer located above the partition 3 is the upper washer 55, and the central washer located below the partition 3 is the lower washer 56. The support structure 6 connects the upper washer 55 and the lower washer 56.

[0050] The support structure 6 includes an upper support body 61 and a lower support body 62. The upper support body 61 is connected to the upper washer 55, and the lower support body 62 is connected to the lower washer 56. The upper support body 61 and the lower support body 62 are directly connected. At this time, the inner mounting part 71 has a through hole for the support structure 6 to pass through.

[0051] To increase the bonding area between the support structure 6 and the inner mounting portion 71, the support structure 6 may optionally have a stepped portion, with the inner mounting portion 71 fixed to the stepped surface of the stepped portion. In some embodiments, the stepped portion may be located at the interface between the upper support body 61 and the lower support body 62. In this case, preferably, the bottom surface of the upper support body 61 is fixedly connected to the top surface of the inner mounting portion 71, and the lower support body 62 is fixedly connected to the bottom surface of the inner mounting portion 71. This can further improve the stability of the connection between the sub-diaphragm 7 and the support structure 6.

[0052] In this embodiment, the upper support 61 and the lower support 62 are both solid structures. In other embodiments, the upper support 61 can be a hollow convex hull structure, and similarly, the lower support 62 can also be a hollow convex hull structure.

[0053] Example 2

[0054] Please refer to Figure 2 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 upper support 61 and the lower support 62 are integrally formed structures.

[0055] Example 3

[0056] Please refer to Figure 3 The third embodiment of this utility model is a parallel technical solution to the first embodiment. The difference between the third and the first embodiment is that no through hole is provided on the inner mounting part 71, the upper support body 61 is located above the inner mounting part 71, the lower support body 62 is located below the inner mounting part 71, and the upper support body 61 and the lower support body 62 are respectively connected to the inner mounting part 71. That is to say, the upper support body 61 and the lower support body 62 are indirectly connected through the inner mounting part 71.

[0057] Example 4

[0058] Please refer to Figure 4 Embodiment 4 of this utility model is a parallel technical solution to Embodiment 1, but differs from Embodiment 1 in that: the upper support 61 and the upper washer 55 are integrally formed; and / or, the lower support 62 and the lower washer 56 are integrally formed. This can enhance the magnetic conductivity of the upper washer 55 and / or the lower washer 56, and at the same time, it can reduce the number of assembly parts of the sound unit, facilitating the assembly and production of the sound unit.

[0059] In this embodiment, the upper support 61 and the upper washer 55 are integrally formed, while the lower support 62 and the lower washer 56 are separate structures. In other embodiments, the lower support 62 and the lower washer 56 can also be integrally formed, while the upper support 61 and the upper washer 55 can be separate structures. Of course, in another embodiment, it is also possible for the upper support 61 and the upper washer 55 to be integrally formed, and for the lower support 62 and the lower washer 56 to be integrally formed.

[0060] Example 5

[0061] Please refer to Figure 5 Embodiment 5 of this utility model is a parallel technical solution to Embodiment 4, differing from Embodiment 4 in that: the upper support 61 is a hollow convex hull structure, while the lower support 62 is a solid structure. In other embodiments, it is also possible for the lower support 62 to be a hollow convex hull structure and the upper support 61 to be a solid structure; of course, in another embodiment, it is also possible for both the upper support 61 and the lower support 62 to be hollow convex hull structures.

[0062] 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 Two basin stands, at least one of which is provided with a sound outlet; Two magnetic circuit assemblies are connected to the basin frame in a one-to-one correspondence. Each magnetic circuit assembly has a magnetic gap and includes a yoke and a central magnetic structure disposed on the yoke. The magnetic gap is arranged around the central magnetic structure. A diaphragm assembly, wherein the diaphragm assembly is connected to the frame on both sides, and the diaphragm assembly has a hollow window in the center; A voice coil, located at the cutout window and connected to the diaphragm assembly, with its top and bottom ends extending into the two magnetic gaps respectively; A spacer is provided in the hollow area of ​​the voice coil, the edge of the spacer is connected to the inner peripheral wall of the voice coil, and a window is provided in the center of the spacer, at which a secondary diaphragm is provided; A support structure is provided, which connects the sub-diaphragm to the two central magnetic structures to support the two central magnetic structures.

2. The sound-generating unit according to claim 1, characterized in that: The sub-diaphragm includes an inner mounting part, a deformation part, and an outer mounting part connected sequentially from the inside to the outside. The inner mounting part is fixedly connected to the support structure, and the outer mounting part is connected to the spacer.

3. The sound-generating unit according to claim 2, characterized in that: The internal mounting portion has a perforation through which the support structure passes.

4. The sound-generating unit according to claim 3, characterized in that: The support structure has a stepped portion, and the internal mounting portion is fixed to the stepped surface of the stepped portion.

5. The sound-generating unit according to claim 2, characterized in that: The central magnetic structure includes a central magnet and a central washer. The central magnet connects the central washer and the yoke. The central washer located above the partition is the upper washer, and the central washer located below the partition is the lower washer. The support structure connects the upper washer and the lower washer.

6. The sound-generating unit according to claim 5, characterized in that: The support structure includes an upper support body and a lower support body. The upper support body is connected to the upper washer, and the lower support body is connected to the lower washer. Alternatively, the upper support body and the lower support body are respectively connected to the inner mounting part, and the upper support body and the lower support body are indirectly connected.

7. The sound-generating unit according to claim 6, characterized in that: The upper support and the upper washer are integrally formed as a single structure; and / or, the lower support and the lower washer are integrally formed as a single structure.

8. The sound-generating unit according to claim 6, characterized in that: The upper support is a solid structure or a hollow convex hull structure; the lower support is a solid structure or a hollow convex hull structure.

9. The sound-generating unit according to claim 1, characterized in that: The connection between the diaphragm assembly and the voice coil is located in the middle of the voice coil.

10. The sound-generating unit according to claim 1, characterized in that: The two magnetic circuit components are mirror-symmetric.

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