Sound production unit

Abstract

The utility model discloses a sound production unit, which comprises a voice coil, a diaphragm assembly, 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 and are provided with magnetic gaps; the top end and the bottom end of the voice coil respectively extend into the two magnetic gaps; the vibrating diaphragm assembly comprises a voice diaphragm and a dome, the voice diaphragm comprises an inner fixing part, a folding ring part and an outer fixing part which are sequentially connected from inside to outside, the outer fixing part is connected with the basin frame, the inner fixing part is provided with a hollow window, the dome is connected with the inner fixing part and seals the hollow window, the dome is provided with a convex hull used for accommodating partial area of the voice coil, and the convex hull is fixedly connected with the voice coil. The sounding unit is novel and simple in structure and good in performance; the convex hulls on the spherical top can provide a larger bonding area for the voice coil, so that the structural stability of the sound production unit is improved, and the risk of separation of the voice coil and the diaphragm assembly is reduced.

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 voice coil, the top and bottom ends of which extend into the two magnetic gaps respectively;

[0009] A diaphragm assembly, comprising a diaphragm and a dome, the diaphragm comprising an inner fixing portion, a folded ring portion, and an outer fixing portion connected sequentially from the inside out, the outer fixing portion being connected to the frame, the inner fixing portion having a perforated window, the dome being connected to the inner fixing portion and closing the perforated window, the dome having a bulge for accommodating a portion of the voice coil, the bulge being fixedly connected to the voice coil.

[0010] In one embodiment, at least one of the inner wall surface, top surface, bottom surface and outer wall surface of the voice coil is fixedly connected to the convex hull.

[0011] In one embodiment, the convex hull is generally in the shape of a ring frame.

[0012] In one embodiment, the upper or lower portion of the voice coil is housed within the convex hull.

[0013] In one embodiment, the dome is positioned at the center of the voice coil.

[0014] In one embodiment, the two magnetic circuit components are mirror-symmetric.

[0015] In one embodiment, the external fixing part is fixedly connected to each of the two basin frames.

[0016] 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.

[0017] In one embodiment, a support assembly is also included, the support assembly connecting the voice coil and the frame.

[0018] In one embodiment, the support assembly includes a centering support sheet and / or a secondary membrane.

[0019] The beneficial effects of this utility model are as follows: The sound unit has a novel and simple 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 help improve the symmetry and flatness of the BL, reduce distortion, and thus improve the performance of the sound unit; the convex bulge on the dome can provide a larger bonding area for the voice coil, thereby improving the structural stability of the sound unit and reducing the risk of separation between the voice coil and the diaphragm assembly. 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 This is a cross-sectional view of the sound-generating unit according to Embodiment 1 of this utility model;

[0022] Figure 2 This is an exploded view of the sound-generating unit according to Embodiment 1 of this utility model;

[0023] Figure 3 This is a cross-sectional view of the dome in the sound-generating unit of Embodiment 1 of this utility model.

[0024] Explanation of icon numbers:

[0025] 1. Diaphragm assembly; 11. Diaphragm; 111. First part; 112. Second part; 12. Dome; 121. Convex hull;

[0026] 2. Voice coil;

[0027] 3. Sink stand; 31. Sound outlet;

[0028] 4. Magnetic circuit components; 41. Yoke; 42. Central magnetic structure; 43. Side magnetic structure;

[0029] 5. 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] Please refer to Figures 1 to 3 The first embodiment of this utility model is as follows: a sound-generating unit, including a voice coil 2, a diaphragm assembly 1, two frames 3, and two magnetic circuit assemblies 4, at least one of the frames 3 is provided with a sound outlet 31; the magnetic circuit assemblies 4 are connected to the frames 3 one-to-one, and the magnetic circuit assemblies 4 have magnetic gaps; the top and bottom ends of the voice coil 2 respectively extend into the two magnetic gaps; the diaphragm assembly 1 includes a diaphragm 11 and a dome 12, the diaphragm 11 is generally in the shape of a ring frame, 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 the frame 3, the inner fixing part has a hollow window, the dome 12 is connected to the inner fixing part and closes the hollow window, the dome 12 has a protrusion 121 for accommodating a part of the voice coil 2, the protrusion 121 is generally in the shape of a ring frame, and the protrusion 121 is fixedly connected to the voice coil 2.

[0038] The upper or lower part of the voice coil 2 is housed in the convex shroud 121. The convex shroud 121 has a concave cross-section. At least one of the inner wall surface, top surface, bottom surface, and outer wall surface of the voice coil 2 is fixedly connected to the convex shroud 121. When the upper part of the voice coil 2 is housed in the convex shroud 121, the top surface of the voice coil 2 can be fixedly connected to the convex shroud 121. When the lower part of the voice coil 2 is housed in the convex shroud 121, the bottom surface of the voice coil 2 can be fixedly connected to the convex shroud 121.

[0039] The dome 12 is positioned in the middle of the voice coil 2. In other words, 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.

[0040] As a preferred embodiment, the two magnetic circuit components 4 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 improve the performance of the sound generating unit to a greater extent.

[0041] The magnetic circuit assembly 4 includes a yoke 41 and a central magnetic structure 42 and a side magnetic structure 43 respectively disposed on the yoke 41. A magnetic gap is formed between the central magnetic structure 42 and the side magnetic structure 43. In the two magnetic circuit assemblies 4, the magnetic poles of the central magnetic structure 42 face opposite directions. Specifically, the central magnetic structure 42 includes a central magnet and a central washer, with the central magnet connecting the central washer to the yoke 41; the side magnetic structure 43 includes a side magnet and a side washer, with the side magnet connecting the side washer to the yoke 41. In specific products, the flange of the yoke 41 can also be used to replace at least part of the side magnetic structure 43.

[0042] Preferably, the external fixing part is fixedly connected to each of the two basin frames 3. In this embodiment, the external fixing part includes a first part 111 and a second part 112 connected together. The first part 111 is located between the two basin frames 3 and is connected to the two basin frames 3 respectively. The second part 112 is connected to the outer peripheral wall of one of the basin frames 3. The presence of the second part 112 can increase the bonding and fixing area of ​​the diaphragm 11, reduce the risk of the external fixing part detaching from the basin frame 3, and improve the structural stability of the sound-generating unit.

[0043] 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 5, which connects the voice coil 2 and the frame 3, and includes a centering support and / or a secondary diaphragm.

[0044] 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 voice coil, the top and bottom ends of which extend into the two magnetic gaps respectively; A diaphragm assembly, comprising a diaphragm and a dome, the diaphragm comprising an inner fixing portion, a folded ring portion, and an outer fixing portion connected sequentially from the inside out, the outer fixing portion being connected to the frame, the inner fixing portion having a perforated window, the dome being connected to the inner fixing portion and closing the perforated window, the dome having a bulge for accommodating a portion of the voice coil, the bulge being fixedly connected to the voice coil.

2. The sound-generating unit according to claim 1, characterized in that: At least one of the inner wall surface, top surface, bottom surface, and outer wall surface of the voice coil is fixedly connected to the convex hull.

3. The sound-generating unit according to claim 1, characterized in that: The convex hull is generally in the shape of a ring frame.

4. The sound-generating unit according to claim 1, characterized in that: The upper or lower part of the voice coil is housed in the convex hull.

5. The sound-generating unit according to claim 1, characterized in that: The dome is positioned at the center of the voice coil.

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

7. The sound-generating unit according to claim 1, characterized in that: The external fixing parts are respectively fixedly connected to the two basin frames.

8. The sound-generating unit according to claim 7, 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.

9. 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.

10. The sound-generating unit according to claim 9, characterized in that: The support assembly includes a centering support sheet and / or a secondary membrane.

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