Sound production unit

Abstract

The utility model discloses a sound production unit, which comprises a diaphragm assembly, a voice coil, a spacer, an annular sealing cover, 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 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, and the edge of the spacer is connected with the inner peripheral wall of the voice coil; the annular sealing cover comprises an outer side part, an accommodating part and an inner side part which are connected in sequence, the accommodating part accommodates partial area of the voice coil and is fixedly connected with the voice coil, the outer side part is in sealed connection with the diaphragm assembly, and the inner side part is in sealed connection with the spacer. The sound production unit is excellent in performance; the arrangement of the annular sealing cover can improve the structural stability of the sound production unit and reduce the risk of separation of the voice coil and the diaphragm assembly / spacer.

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 hollowed-out window, 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] An annular sealing cover includes an outer portion, a receiving portion, and an inner portion connected in sequence. The receiving portion receives a portion of the voice coil and is fixedly connected to the voice coil. The outer portion is sealed to the diaphragm assembly, and the inner portion is sealed to the spacer.

[0012] In one embodiment, the receiving portion has a U-shaped cross-section, and at least one of the top surface, bottom surface, inner wall surface, and outer wall surface of the voice coil is fixedly connected to the receiving portion.

[0013] In one embodiment, the diaphragm assembly is positioned corresponding to the center of the voice coil.

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

[0015] 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.

[0016] In one embodiment, the external fixing part is fixedly connected to each of the two basin frames.

[0017] 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.

[0018] In one embodiment, the diaphragm assembly further includes an annular center patch, which is fixed to the inner fixing portion, and the outer portion is directly or indirectly connected to the annular center patch.

[0019] In one embodiment, the inner edge of the ring is connected to the outer peripheral wall of the voice coil.

[0020] In one embodiment, a support assembly is also included, the support assembly connecting the voice coil and the frame.

[0021] 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 setting of the annular sealing cover can improve the structural stability of the sound unit and reduce the risk of separation between the voice coil and the diaphragm assembly / spacing. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a cross-sectional view of the sound-generating unit according to Embodiment 1 of this utility model;

[0024] Figure 2 This is an exploded view of the sound-generating unit according to Embodiment 1 of this utility model;

[0025] Figure 3 This is a cross-sectional view of the sealing cover in the sound-generating unit of Embodiment 1 of this utility model.

[0026] Explanation of icon numbers:

[0027] 1. Diaphragm assembly; 11. Diaphragm; 111. First part; 112. Second part; 12. Annular center patch;

[0028] 2. Voice coil;

[0029] 3. Spacing sheet;

[0030] 4. Sink stand; 41. Sound outlet;

[0031] 5. Magnetic circuit assembly; 51. Yoke; 52. Central magnetic structure; 53. Side magnetic structure;

[0032] 6. Annular sealing cover; 61. Outer side; 62. Receiving part; 63. Inner side;

[0033] 7. 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 Figures 1 to 3 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, an annular sealing cover 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, and the magnetic circuit assemblies 5 have magnetic gaps; the two sides of the diaphragm assembly 1 are respectively connected to the frames 4, and the center of the diaphragm assembly 1 has a hollow window; the voice coil 2 is located at the hollow window, 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, and the edge of the spacer 3 is connected to the inner peripheral wall of the voice coil 2; the annular sealing cover 6 is generally in the shape of an annular frame, and the annular sealing cover 6 includes an outer part 61, a receiving part 62 and an inner part 63 connected in sequence. The receiving part 62 receives a part of the voice coil 2 and is fixedly connected to the voice coil 2. The outer part 61 is sealed to the diaphragm assembly 1, and the inner part 63 is sealed to the spacer 3. It is easy to understand that the receiving part 62 can receive either the bottom or the top of the voice coil 2.

[0042] The receiving part 62 has a concave cross-section, and at least one of the top surface, bottom surface, inner wall surface and outer wall surface of the voice coil 2 is fixedly connected to the receiving part 62.

[0043] The diaphragm assembly 1 is positioned 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] In one embodiment, the diaphragm assembly 1 further includes an annular center patch 12, which is fixed to the inner fixing part. The outer part 61 is directly or indirectly connected to the annular center patch 12, and the annular center patch 12 can improve the structural strength of the inner fixing part.

[0048] Optionally, the inner edge of the annular center patch 12 is connected to the outer peripheral wall of the voice coil 2. When the sound-generating unit does not have the annular center patch 12, the inner edge of the inner fixing part can also be directly connected to the voice coil 2.

[0049] 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.

[0050] 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 7, which connects the voice coil 2 and the frame 4, and includes a centering support and / or a secondary diaphragm.

[0051] 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 hollowed-out window, 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; An annular sealing cover includes an outer portion, a receiving portion, and an inner portion connected in sequence. The receiving portion receives a portion of the voice coil and is fixedly connected to the voice coil. The outer portion is sealed to the diaphragm assembly, and the inner portion is sealed to the spacer.

2. The sound-generating unit according to claim 1, characterized in that: The cross-section of the receiving part is U-shaped, and at least one of the top surface, bottom surface, inner wall surface and outer wall surface of the voice coil is fixedly connected to the receiving part.

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

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

5. 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.

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

7. The sound-generating unit according to claim 6, 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.

8. The sound-generating unit according to claim 5, characterized in that: The diaphragm assembly also includes an annular center patch, which is fixed to the inner fixing part, and the outer part is directly or indirectly connected to the annular center patch.

9. The sound-generating unit according to claim 8, characterized in that: The inner edge of the ring is connected to the outer 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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