Sound production unit

Abstract

The utility model discloses a sound production unit, which comprises a diaphragm assembly, a voice coil, a spacer, 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 basins in a one-to-one correspondence manner, and each magnetic circuit assembly is provided with a magnetic gap; the two sides of the vibrating diaphragm assembly are respectively connected with the basin stand, and the center of the vibrating 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, and the edge of the spacer is connected with the inner peripheral wall of the voice coil. The sound production unit is novel in structure, adopts a double-magnetic-circuit design, can fully utilize the front and rear cavity spaces of the sound production unit, increases the total volume of the magnetic steel, and improves the performance of the sound production unit; the structure of the single voice coil enables the sounding unit to be simpler in structure, facilitates the production of the sounding unit, and facilitates the control of the manufacturing cost of the sounding unit.

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. Utility Model Content

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

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

[0006] Two basin stands, at least one of which is provided with a sound outlet;

[0007] Two magnetic circuit assemblies are connected to the basin frame in a one-to-one correspondence, and the magnetic circuit assemblies have magnetic gaps;

[0008] 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;

[0009] 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;

[0010] A spacer is disposed in the hollow area of ​​the voice coil, and the edge of the spacer is connected to the inner peripheral wall of the voice coil.

[0011] In one embodiment, the connection between the diaphragm assembly and the voice coil is located in the middle of the voice coil.

[0012] In one embodiment, the two magnetic circuit components are mirror-symmetric.

[0013] In one embodiment, the diaphragm assembly includes a diaphragm that is generally ring-shaped, the diaphragm including an inner fixing part, a folded ring part and an outer fixing part connected sequentially from the inside to the outside, and the outer fixing part is connected to at least one of the frame.

[0014] In one embodiment, the external fixing part is fixedly connected to each of the two basin frames.

[0015] In one embodiment, the external fixing part includes a first part and a second part connected together, the first part being located between the two basin stands and connecting the two basin stands respectively, and the second part being connected to the outer peripheral wall of one of the basin stands.

[0016] In one embodiment, the diaphragm assembly further includes an annular center patch fixed to the inner fixing portion, the inner edge of the annular center patch being connected to the outer peripheral wall of the voice coil.

[0017] In one embodiment, the inner edge of the annular ring has a bent and extended first flange, which is fixedly connected to the outer peripheral wall of the voice coil.

[0018] In one embodiment, the edge of the spacer has a bent and extended second flange, which is fixedly connected to the inner peripheral wall of the voice coil.

[0019] In one embodiment, a support assembly is also included, the support assembly connecting the voice coil and the frame.

[0020] 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, and improve the performance of the sound unit; moreover, the single voice coil architecture can make the structure of the sound unit simpler, facilitate the production and manufacturing of the sound unit, and help control the manufacturing cost of the sound unit. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a cross-sectional view of the sound-generating unit according to Embodiment 1 of this utility model;

[0023] Figure 2 This is an exploded view of the sound-generating unit according to Embodiment 1 of this utility model;

[0024] Figure 3 This is a cross-sectional view of the first sound-generating unit in Embodiment 2 of this utility model;

[0025] Figure 4 This is a cross-sectional view of the second type of sound-generating unit in Embodiment 2 of this utility model;

[0026] Figure 5 This is a cross-sectional view of the third sound-generating unit in Embodiment 2 of this utility model.

[0027] Explanation of icon numbers:

[0028] 1. Diaphragm assembly; 11. Diaphragm; 111. First part; 112. Second part; 12. Annular center patch; 121. First flange;

[0029] 2. Voice coil;

[0030] 3. Spacer; 31. Second flange;

[0031] 4. Sink stand; 41. Sound outlet;

[0032] 5. Magnetic circuit assembly; 51. Yoke; 52. Central magnetic structure; 53. Side magnetic structure;

[0033] 6. Support components. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Example 1

[0041] Please refer to Figure 1 and Figure 2 One embodiment of this utility model is as follows: a sound-generating unit, including a diaphragm assembly 1, a voice coil 2, a spacer 3, 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 to the frames 4 in a one-to-one correspondence, and the magnetic circuit assemblies 5 have magnetic gaps; the frames 4 are respectively 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, specifically, the inner edge of the diaphragm assembly 1 is connected to the outer peripheral wall of the voice coil 2; the spacer 3 is disposed in the hollow area of ​​the voice coil 2, and the edge of the spacer 3 is connected to the inner peripheral wall of the voice coil 2.

[0042] 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.

[0043] As a preferred embodiment, the two magnetic circuit components 5 are arranged in a mirror-symmetric manner, which can reduce distortion to a greater extent, improve the symmetry and flatness of the BL, and thus enhance the performance of the sound-generating unit to a greater extent.

[0044] The magnetic circuit assembly 5 includes a yoke 51 and a central magnetic structure 52 and a side magnetic structure 53 respectively disposed on the yoke 51. A magnetic gap is formed between the central magnetic structure 52 and the side magnetic structure 53. In the two magnetic circuit assemblies 5, the magnetic poles of the central magnetic structure 52 face opposite directions. Specifically, the central magnetic structure 52 includes a central magnet and a central washer, with the central magnet connecting the central washer to the yoke 51; the side magnetic structure 53 includes a side magnet and a side washer, with the side magnet connecting the side washer to the yoke 51. In specific products, the flange of the yoke 51 can also be used to replace at least part of the side magnetic structure 53.

[0045] The diaphragm assembly 1 includes a ring-shaped diaphragm 11. The diaphragm 11 includes an inner fixing part, a folded ring part, and an outer fixing part connected sequentially from the inside to the outside. The outer fixing part is connected to at least one of the frame frames 4, preferably the outer fixing part is fixedly connected to two frame frames 4 respectively. In this embodiment, the outer fixing part includes a first part 111 and a second part 112 connected together. The first part 111 is located between the two frame frames 4 and is connected to the two frame frames 4 respectively. The second part 112 is connected to the outer peripheral wall of one frame frame 4. The presence of the second part 112 can increase the bonding and fixing area of ​​the diaphragm 11, reduce the risk of the outer fixing part detaching from the frame frame 4, and improve the structural stability of the sound-generating unit.

[0046] The diaphragm assembly 1 also includes an annular center patch 12, which is fixed to the inner fixing part. The inner edge of the annular center patch 12 is connected to the outer peripheral wall of the voice coil 2. The annular center patch 12 can improve the structural strength of the inner fixing part. When the sound-generating unit does not have the annular center patch 12, it is also possible for the inner edge of the inner fixing part to be directly connected to the voice coil 2.

[0047] As a preferred embodiment, the annular center patch 12 is aligned with the spacer 3, and the material of the spacer 3 and the annular center patch 12 can be the same or different.

[0048] To correct the deviation of the voice coil 2 and improve the performance of the sound-generating unit to a greater extent, the sound-generating unit may optionally include a support component 6, which connects the voice coil 2 and the frame 4, and includes a centering support and / or a secondary diaphragm.

[0049] Example 2

[0050] Please refer to Figures 3 to 5Embodiment 2 of this utility model is a further improvement on Embodiment 1. The difference from Embodiment 1 is that the inner edge of the annular center patch 12 has a bent and extended first flange 121. The first flange 121 is fixedly connected to the outer peripheral wall of the voice coil 2. Optionally, the first flange 121 is bonded and fixed to the voice coil 2. The setting of the first flange 121 can improve the stability of the connection between the diaphragm assembly 1 and the voice coil 2 and reduce the risk of separation between the annular center patch 12 and the voice coil 2.

[0051] The first flange 121 can be bent towards the top of the voice coil 2 or towards the bottom of the voice coil 2, depending on the specific configuration.

[0052] Similarly, to improve the stability of the connection between the spacer 3 and the voice coil 2 and reduce the risk of separation between the spacer 3 and the voice coil 2, the edge of the spacer 3 has a bent and extended second flange 31. The second flange 31 is fixedly connected to the inner peripheral wall of the voice coil 2. Optionally, the second flange 31 is bonded to the voice coil 2. The second flange 31 can be bent towards the top of the voice coil 2 or towards the bottom of the voice coil 2, depending on the specific configuration.

[0053] It is easy to understand that the first flange 121 and the second flange 31 can both be bent and extended downwards simultaneously (e.g. Figure 3 As shown), it can also bend and extend in the opposite direction (as shown). Figure 4 As shown), it can also bend and extend upwards simultaneously (as shown). Figure 5 (As shown).

[0054] It should be noted that in actual products, the first flange 121 and the second flange 31 can exist simultaneously, or only the first flange 121 can exist without the second flange 31, or only the second flange 31 can exist without the first flange 121.

[0055] 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, and the magnetic circuit assemblies have magnetic gaps; 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 disposed in the hollow area of ​​the voice coil, and the edge of the spacer is connected to the inner peripheral wall of the voice coil.

2. 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.

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

4. The sound-generating unit according to claim 1, characterized in that: The diaphragm assembly includes a ring-shaped diaphragm, which includes an inner fixing part, a folded ring part, and an outer fixing part connected sequentially from the inside to the outside. The outer fixing part is connected to at least one of the frame frames.

5. The sound-generating unit according to claim 4, characterized in that: The external fixing parts are respectively fixedly connected to the two basin frames.

6. The sound-generating unit according to claim 4, characterized in that: The external fixing part includes a first part and a second part connected together. The first part is located between the two basin stands and is connected to the two basin stands respectively. The second part is connected to the outer peripheral wall of one of the basin stands.

7. The sound-generating unit according to claim 4, characterized in that: The diaphragm assembly also includes an annular center patch, which is fixed to the inner fixing part, and the inner edge of the annular center patch is connected to the outer peripheral wall of the voice coil.

8. The sound-generating unit according to claim 7, characterized in that: The inner edge of the ring has a bent and extended first flange, which is fixedly connected to the outer peripheral wall of the voice coil.

9. The sound-generating unit according to claim 1, characterized in that: The edge of the partition has a bent and extended second flange, which is fixedly connected to the inner peripheral wall of the voice coil.

10. The sound-generating unit according to claim 1, characterized in that: It also includes a support assembly that connects the voice coil to the frame.

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