Loudspeaker module

Abstract

The utility model discloses a loudspeaker module, which comprises a module shell and a miniature loudspeaker monomer, a window is arranged on the module shell, and the internal space of the module shell is a rear cavity; the miniature loudspeaker single body is arranged at the window, the miniature loudspeaker single body comprises a frame, an annular magnetic structure, a central magnetic structure and a vibration assembly, and the annular magnetic structure is connected with the frame; the bottom of the central magnetic structure is fixedly connected with the inner surface of the module shell, a vertically-through magnetic gap is formed between the central magnetic structure and the annular magnetic structure, and the magnetic gap is communicated with the rear cavity; the vibration assembly comprises a vibrating diaphragm assembly and a voice coil which are connected, the vibrating diaphragm assembly is connected with the frame, and the voice coil is arranged corresponding to the magnetic gap. The loudspeaker module is novel in structure, the magnetic gaps of the miniature loudspeaker single bodies in the loudspeaker module are vertically through, the voice coil bottoming phenomenon is avoided, and the loudspeaker module can achieve high performance.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly relates to a speaker module. Background Art

[0002] Miniature speakers are widely used in portable electronic devices such as mobile phones, laptop computers, hearing aids, etc. With the rapid development of these portable electronic devices, people's requirements for the miniature electroacoustic devices they carry are getting higher and higher, and the miniature speakers in use are popularizing large-amplitude speakers or super-linear speakers.

[0003] However, with the thinning of portable electronic devices, the thickness of the speaker module is getting smaller and smaller, and its corresponding performance is attenuated to a certain extent. The thinner the miniature speaker unit in the speaker module, the more serious the shortage of the space from the voice coil to the yoke. During large-amplitude vibration, there may even be a phenomenon of the voice coil hitting the yoke (commonly known as voice coil bottoming), which undoubtedly hinders the development of large amplitude of the miniature speaker unit. If the voice coil is moved a certain distance away from the yoke, it will not only affect the performance of the miniature speaker unit, but also may cause the voice coil to jump out of the magnetic gap, resulting in problems such as excessive distortion of the miniature speaker unit and affecting the user experience of consumers. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a high-performance speaker module without the risk of voice coil bottoming.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a speaker module, comprising:

[0006] A module housing, on which there is a window, and the internal space of the module housing is a rear cavity;

[0007] A miniature speaker unit, which is arranged at the window, and the miniature speaker unit includes

[0008] A chassis;

[0009] A ring-shaped magnetic structure, which is connected to the chassis;

[0010] A central magnetic structure, the bottom of which is fixedly connected to the inner surface of the module housing, and a vertically penetrating magnetic gap is formed between the central magnetic structure and the ring-shaped magnetic structure, and the magnetic gap communicates with the rear cavity;

[0011] A vibration assembly, which includes a diaphragm assembly and a voice coil connected to each other, the diaphragm assembly is connected to the chassis, and the voice coil is arranged corresponding to the magnetic gap.

[0012] In one embodiment, the central magnetic structure includes a lower washer, a central magnet, and an upper washer that are connected in sequence from bottom to top, and the lower washer is fixedly connected to the module housing.

[0013] In one embodiment, a positioning groove for positioning the lower washer is provided on the inner surface of the module housing.

[0014] In one embodiment, the annular magnetic structure includes a yoke, side magnets, and side washers that are connected in sequence from bottom to top, the chassis is connected to the side washer and / or the side magnet, the yoke is arranged corresponding to the lower washer, and the side washer is arranged corresponding to the central washer.

[0015] In one embodiment, there is a gap between the bottom surface of the annular magnetic structure and the inner surface of the module housing, and the magnetic gap communicates with the rear cavity through the gap.

[0016] In one embodiment, an installation step is provided in the module housing around the opening window, the chassis is installed at the installation step, and the micro speaker unit closes one end of the opening window communicating with the rear cavity.

[0017] In one embodiment, the diaphragm assembly includes a sounding film, and the sounding film includes an inner fixing portion, a folding ring portion, and an outer fixing portion that are connected in sequence from inside to outside, and the outer fixing portion is connected to the chassis.

[0018] In one embodiment, the outer fixing portion is connected to the installation step.

[0019] In one embodiment, the chassis is indirectly connected to the installation step through the outer fixing portion.

[0020] In one embodiment, the diaphragm assembly further includes a dome provided on the inner fixing portion.

[0021] The beneficial effects of the present utility model are as follows:

[0022] The structure of this speaker module is novel. In this speaker module, the magnetic gap of the micro speaker unit penetrates up and down, and there is no yoke blocking below the voice coil. Therefore, even when the micro speaker unit works at a large amplitude, the voice coil will not bottom out, enabling the speaker module to achieve high performance.

[0023] The overall thickness of this speaker module is relatively thin, which is particularly suitable for portable electronic devices with limited installation space. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1 Cross-section of the speaker module according to Embodiment 1 of the present invention Figure 1 ;

[0026] Figure 2 Cross-section of the speaker module according to Embodiment 1 of the present invention Figure 2 。

[0027] Explanation of the reference numerals in the drawings:

[0028] 10. Module housing; 101. Window opening; 102. Rear cavity; 103. Gap; 104. Positioning groove; 105. Mounting step;

[0029] 20. Micro speaker unit;

[0030] 1. Basin frame;

[0031] 2. Ring-shaped magnetic structure; 21. Yoke; 22. Side magnet; 23. Side washer;

[0032] 3. Central magnetic structure; 31. Lower washer; 32. Central magnet; 33. Upper washer;

[0033] 4. Vibration assembly; 41. Sound film; 411. Inner fixing part; 412. Folded ring part; 413. Outer fixing part; 42. Voice coil; 43. Dome;

[0034] 5. Magnetic gap. Detailed implementation manners

[0035] The realization of the purpose, functional features and advantages of the present invention will be further described in conjunction with the embodiments with reference to the drawings.

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0037] It should be noted that if there are directional indications involved in the embodiments of the present utility model, such as up, down, left, right, front, back..., the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0039] In addition, the meaning of "and / or" that appears throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution, or the solution, or the solution that satisfies both simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0040] In this application, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] Embodiment 1

[0042] Please refer to Figure 1 and Figure 2, Embodiment 1 of the present utility model is: a speaker module, including a module housing 10 and a micro speaker unit 20. There is a window 101 on the module housing 10, and the internal space of the module housing 10 is a rear cavity 102; the micro speaker unit 20 is arranged at the window 101. The micro speaker unit 20 includes a chassis 1, an annular magnetic structure 2, a central magnetic structure 3 and a vibration assembly 4. The annular magnetic structure 2 is connected to the chassis 1; the bottom of the central magnetic structure 3 is fixedly connected to the inner surface of the module housing 10. A vertically penetrating magnetic gap 5 is formed between the central magnetic structure 3 and the annular magnetic structure 2, and the magnetic gap 5 communicates with the rear cavity 102. Specifically, there is a gap 103 between the bottom surface of the annular magnetic structure 2 and the inner surface of the module housing 10, and the magnetic gap 5 communicates with the rear cavity 102 through the gap 103; the vibration assembly 4 includes a connected diaphragm assembly and voice coil 42. The diaphragm assembly is connected to the chassis 1, and the voice coil 42 is arranged corresponding to the magnetic gap 5.

[0043] The central magnetic structure 3 includes a lower washer 31, a central magnet 32 and an upper washer 33 connected in sequence from bottom to top. The lower washer 31 is fixedly connected to the module housing 10. To facilitate the positioning and installation of the central magnetic structure 3 and the module housing 10, a positioning groove 104 for positioning the lower washer 31 is provided on the inner surface of the module housing 10.

[0044] The annular magnetic structure 2 includes a yoke 21, a side magnet 22 and a side washer 23 connected in sequence from bottom to top. The chassis 1 is connected to the side washer 23 and / or the side magnet 22. The yoke 21 is arranged corresponding to the lower washer 31, and the side washer 23 is arranged corresponding to the central washer.

[0045] To facilitate the positioning and installation of the chassis 1 and the module housing 10, there is an installation step 105 arranged around the window 101 in the module housing 10. The chassis 1 is installed at the installation step 105. The micro speaker unit 20 closes one end of the window 101 communicating with the rear cavity 102, that is, a part of the diaphragm assembly of the micro speaker unit 20 is exposed from the window 101 to the outside of the module housing 10.

[0046] The diaphragm assembly includes a diaphragm 41. The diaphragm 41 includes an inner fixing part 411, a folding part 412 and an outer fixing part 413 connected in sequence from inside to outside. The outer fixing part 413 is connected to the chassis 1. Preferably, the outer fixing part 413 is connected to the installation step 105.

[0047] In this embodiment, the basin frame 1 is indirectly connected to the mounting step 105 through the external fixing portion 413. In other embodiments, the basin frame 1 and the external fixing portion 413 may also be adhesively fixed to the mounting step 105 simultaneously.

[0048] To improve the rigidity of the diaphragm assembly and thus the acoustic performance of the speaker module, optionally, the diaphragm assembly further includes a dome 43 disposed on the internal fixing portion 411. In a specific product, a window may be provided in the central region of the internal fixing portion 411 to reduce the manufacturing consumables of the sound film 41 and the overall weight of the vibration assembly 4. At this time, the dome 43 closes the window.

[0049] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A speaker module, characterized in that: including a module housing, on which there is a window, and the internal space of the module housing is a rear cavity; a micro speaker unit, which is arranged at the window, and the micro speaker unit includes a chassis; a ring-shaped magnetic structure, which is connected to the chassis; a central magnetic structure, the bottom of which is fixedly connected to the inner surface of the module housing, and a vertically through magnetic gap is formed between the central magnetic structure and the ring-shaped magnetic structure, and the magnetic gap communicates with the rear cavity; a vibration assembly, which includes a diaphragm assembly and a voice coil connected to each other, the diaphragm assembly is connected to the chassis, and the voice coil is arranged corresponding to the magnetic gap.

2. The speaker module according to claim 1, wherein: The central magnetic structure includes a lower washer, a central magnet and an upper washer connected in sequence from bottom to top, and the lower washer is fixedly connected to the module housing.

3. The loudspeaker module according to claim 2, wherein: The inner surface of the module housing is provided with a positioning groove for positioning the lower washer.

4. The loudspeaker module according to claim 2, wherein: The ring-shaped magnetic structure includes a yoke, a side magnet and a side washer connected in sequence from bottom to top, the chassis is connected to the side washer and / or the side magnet, the yoke is arranged corresponding to the lower washer, and the side washer is arranged corresponding to the central washer.

5. The loudspeaker module according to claim 1, wherein: There is a gap between the bottom surface of the ring-shaped magnetic structure and the inner surface of the module housing, and the magnetic gap communicates with the rear cavity through the gap.

6. The loudspeaker module according to claim 1, wherein: There is an installation step around the window in the module housing, the chassis is installed at the installation step, and the micro speaker unit closes one end of the window communicating with the rear cavity.

7. The loudspeaker module according to claim 6, wherein: The diaphragm assembly includes a sound film, and the sound film includes an inner fixing part, a folding ring part and an outer fixing part connected in sequence from inside to outside, and the outer fixing part is connected to the chassis.

8. The loudspeaker module according to claim 7, wherein: The outer fixing part is connected to the installation step.

9. The loudspeaker module according to claim 8, wherein: The chassis is indirectly connected to the installation step through the outer fixing part.

10. The speaker module according to claim 7, wherein: The diaphragm assembly further includes a dome arranged on the inner fixing part.

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